Change etcd_host to etcd_address in QEMU driver, add etcd_host and etcd aliases for convenience

2021-07-09 02:12:43 +03:00
149 changed files with 1879 additions and 11525 deletions
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@ -2,6 +2,6 @@ cmake_minimum_required(VERSION 2.8)
 project(vitastor)
-set(VERSION "0.6.10")
+set(VERSION "0.6.4")
 add_subdirectory(src)
--- a/README-ru.md
+++ b/README-ru.md
@ -40,7 +40,7 @@ Vitastor на данный момент находится в статусе п
 - Драйвер диска для QEMU (собирается вне дерева исходников QEMU)
 - Драйвер диска для утилиты тестирования производительности fio (также собирается вне дерева исходников fio)
 - NBD-прокси для монтирования образов ядром ("блочное устройство в режиме пользователя")
- Утилита для удаления образов/инодов (vitastor-cli rm-data)
+- Утилита удаления образов/инодов (vitastor-rm)
 - Пакеты для Debian и CentOS
 - Статистика операций ввода/вывода и занятого места в разрезе инодов
 - Именование инодов через хранение их метаданных в etcd
@ -48,17 +48,12 @@ Vitastor на данный момент находится в статусе п
 - Сглаживание производительности случайной записи в SSD+HDD конфигурациях
 - Поддержка RDMA/RoCEv2 через libibverbs
 - CSI-плагин для Kubernetes
 - Базовая поддержка OpenStack: драйвер Cinder, патчи для Nova и libvirt
 - Слияние снапшотов (vitastor-cli {snap-rm,flatten,merge})
 - Консольный интерфейс для управления образами (vitastor-cli {ls,create,modify})
 - Плагин для Proxmox
 ## Планы развития
 - Поддержка удаления снапшотов (слияния слоёв)
 - Более корректные скрипты разметки дисков и автоматического запуска OSD
 - Другие инструменты администрирования
- Плагины для OpenNebula и других облачных систем
+- Плагины для OpenStack, OpenNebula, Proxmox и других облачных систем
 - iSCSI-прокси
 - Более быстрое переключение при отказах
 - Фоновая проверка целостности без контрольных сумм (сверка реплик)
@ -375,7 +370,7 @@ Vitastor с однопоточной NBD прокси на том же стен
 - Установите gcc и g++ 8.x или новее.
 - Склонируйте данный репозиторий с подмодулями: `git clone https://yourcmc.ru/git/vitalif/vitastor/`.
 - Желательно пересобрать QEMU с патчем, который делает необязательным запуск через LD_PRELOAD.
-  См `patches/qemu-*.*-vitastor.patch` - выберите версию, наиболее близкую вашей версии QEMU.
+  См `qemu-*.*-vitastor.patch` - выберите версию, наиболее близкую вашей версии QEMU.
 - Установите QEMU 3.0 или новее, возьмите исходные коды установленного пакета, начните его пересборку,
  через некоторое время остановите её и скопируйте следующие заголовки:
   - `<qemu>/include` &rarr; `<vitastor>/qemu/include`
@ -404,21 +399,12 @@ Vitastor с однопоточной NBD прокси на том же стен
  в этом случае пострадает.
 - Быстрая сеть, минимум 10 гбит/с
 - Для наилучшей производительности нужно отключить энергосбережение CPU: `cpupower idle-set -D 0 && cpupower frequency-set -g performance`.
- На хостах мониторов:
+- Пропишите нужные вам значения вверху файлов `/usr/lib/vitastor/mon/make-units.sh` и `/usr/lib/vitastor/mon/make-osd.sh`.
  - Пропишите нужные вам значения в файле `/usr/lib/vitastor/mon/make-units.sh`
 - Создайте юниты systemd для etcd и мониторов: `/usr/lib/vitastor/mon/make-units.sh`
- Пропишите etcd_address и osd_network в `/etc/vitastor/vitastor.conf`. Например:
+- Создайте юниты для OSD: `/usr/lib/vitastor/mon/make-osd.sh /dev/disk/by-partuuid/XXX [/dev/disk/by-partuuid/YYY ...]`
-  ```
+- Вы можете поменять параметры OSD в юнитах systemd. Смысл некоторых параметров:
  {
    "etcd_address": ["10.200.1.10:2379","10.200.1.11:2379","10.200.1.12:2379"],
    "osd_network": "10.200.1.0/24"
  }
  ```
 - Создайте юниты systemd для OSD: `/usr/lib/vitastor/make-osd.sh /dev/disk/by-partuuid/XXX [/dev/disk/by-partuuid/YYY ...]`
 - Вы можете менять параметры OSD в юнитах systemd или в `vitastor.conf`. Смысл некоторых параметров:
  - `disable_data_fsync 1` - отключает fsync, используется с SSD с конденсаторами.
  - `immediate_commit all` - используется с SSD с конденсаторами.
    Внимание: если установлено, также нужно установить его в то же значение в etcd в /vitastor/config/global
  - `disable_device_lock 1` - отключает блокировку файла устройства, нужно, только если вы запускаете
    несколько OSD на одном блочном устройстве.
  - `flusher_count 256` - "flusher" - микропоток, удаляющий старые данные из журнала.
@ -503,10 +489,10 @@ qemu-system-x86_64 -enable-kvm -m 1024
 ### Удалить образ
-Используйте утилиту vitastor-cli rm-data. Например:
+Используйте утилиту vitastor-rm. Например:
 ```
-vitastor-cli rm-data --etcd_address 10.115.0.10:2379/v3 --pool 1 --inode 1 --parallel_osds 16 --iodepth 32
+vitastor-rm --etcd_address 10.115.0.10:2379/v3 --pool 1 --inode 1 --parallel_osds 16 --iodepth 32
 ```
 ### NBD
@ -538,75 +524,6 @@ for i in ./???-*.yaml; do kubectl apply -f $i; done
 После этого вы сможете создавать PersistentVolume. Пример смотрите в файле [csi/deploy/example-pvc.yaml](csi/deploy/example-pvc.yaml).
 ### OpenStack
 Чтобы подключить Vitastor к OpenStack:
 - Установите пакеты vitastor-client, libvirt и QEMU из DEB или RPM репозитория Vitastor
 - Примените патч `patches/nova-21.diff` или `patches/nova-23.diff` к вашей инсталляции Nova.
  nova-21.diff подходит для Nova 21-22, nova-23.diff подходит для Nova 23-24.
 - Скопируйте `patches/cinder-vitastor.py` в инсталляцию Cinder как `cinder/volume/drivers/vitastor.py`
 - Создайте тип томов в cinder.conf (см. ниже)
 - Обязательно заблокируйте доступ от виртуальных машин к сети Vitastor (OSD и etcd), т.к. Vitastor (пока) не поддерживает аутентификацию
 - Перезапустите Cinder и Nova
 Пример конфигурации Cinder:
 ```
 [DEFAULT]
 enabled_backends = lvmdriver-1, vitastor-testcluster
 # ...
 [vitastor-testcluster]
 volume_driver = cinder.volume.drivers.vitastor.VitastorDriver
 volume_backend_name = vitastor-testcluster
 image_volume_cache_enabled = True
 volume_clear = none
 vitastor_etcd_address = 192.168.7.2:2379
 vitastor_etcd_prefix =
 vitastor_config_path = /etc/vitastor/vitastor.conf
 vitastor_pool_id = 1
 image_upload_use_cinder_backend = True
 ```
 Чтобы помещать в Vitastor Glance-образы, нужно использовать
 [https://docs.openstack.org/cinder/pike/admin/blockstorage-volume-backed-image.html](образы на основе томов Cinder),
 однако, поддержка этой функции ещё не проверялась.
 ### Proxmox
 Чтобы подключить Vitastor к Proxmox Virtual Environment (поддерживаются версии 6.4 и 7.1):
 - Добавьте соответствующий Debian-репозиторий Vitastor в sources.list на хостах Proxmox
  (buster для 6.4, bullseye для 7.1)
 - Установите пакеты vitastor-client, pve-qemu-kvm, pve-storage-vitastor (* или см. сноску) из репозитория Vitastor
 - Определите тип хранилища в `/etc/pve/storage.cfg` (см. ниже)
 - Обязательно заблокируйте доступ от виртуальных машин к сети Vitastor (OSD и etcd), т.к. Vitastor (пока) не поддерживает аутентификацию
 - Перезапустите демон Proxmox: `systemctl restart pvedaemon`
 Пример `/etc/pve/storage.cfg` (единственная обязательная опция - vitastor_pool, все остальные
 перечислены внизу для понимания значений по умолчанию):
 ```
 vitastor: vitastor
    # Пул, в который будут помещаться образы дисков
    vitastor_pool testpool
    # Путь к файлу конфигурации
    vitastor_config_path /etc/vitastor/vitastor.conf
    # Адрес(а) etcd, нужны, только если не указаны в vitastor.conf
    vitastor_etcd_address 192.168.7.2:2379/v3
    # Префикс ключей метаданных в etcd
    vitastor_etcd_prefix /vitastor
    # Префикс имён образов
    vitastor_prefix pve/
    # Монтировать образы через NBD прокси, через ядро (нужно только для контейнеров)
    vitastor_nbd 0
 ```
 \* Примечание: вместо установки пакета pve-storage-vitastor вы можете вручную скопировать файл
 [patches/PVE_VitastorPlugin.pm](patches/PVE_VitastorPlugin.pm) на хосты Proxmox как
 `/usr/share/perl5/PVE/Storage/Custom/VitastorPlugin.pm`.
 ## Известные проблемы
 - Запросы удаления объектов могут в данный момент приводить к "неполным" объектам в EC-пулах,
--- a/README.md
+++ b/README.md
@ -34,7 +34,7 @@ breaking changes in the future. However, the following is implemented:
 - QEMU driver (built out-of-tree)
 - Loadable fio engine for benchmarks (also built out-of-tree)
 - NBD proxy for kernel mounts
- Inode removal tool (vitastor-cli rm-data)
+- Inode removal tool (vitastor-rm)
 - Packaging for Debian and CentOS
 - Per-inode I/O and space usage statistics
 - Inode metadata storage in etcd
@ -42,17 +42,12 @@ breaking changes in the future. However, the following is implemented:
 - Write throttling to smooth random write workloads in SSD+HDD configurations
 - RDMA/RoCEv2 support via libibverbs
 - CSI plugin for Kubernetes
 - Basic OpenStack support: Cinder driver, Nova and libvirt patches
 - Snapshot merge tool (vitastor-cli {snap-rm,flatten,merge})
 - Image management CLI (vitastor-cli {ls,create,modify})
 - Proxmox storage plugin
 ## Roadmap
 - Snapshot deletion (layer merge) support
 - Better OSD creation and auto-start tools
 - Other administrative tools
- Plugins for OpenNebula, Proxmox and other cloud systems
+- Plugins for OpenStack, OpenNebula, Proxmox and other cloud systems
 - iSCSI proxy
 - Faster failover
 - Scrubbing without checksums (verification of replicas)
@ -343,7 +338,7 @@ Vitastor with single-thread NBD on the same hardware:
      * For QEMU 2.0+: `<qemu>/qapi-types.h` &rarr; `<vitastor>/qemu/b/qemu/qapi-types.h`
   - `config-host.h` and `qapi` are required because they contain generated headers
 - You can also rebuild QEMU with a patch that makes LD_PRELOAD unnecessary to load vitastor driver.
-  See `patches/qemu-*.*-vitastor.patch`.
+  See `qemu-*.*-vitastor.patch`.
 - Install fio 3.7 or later, get its source and symlink it into `<vitastor>/fio`.
 - Build & install Vitastor with `mkdir build && cd build && cmake .. && make -j8 && make install`.
  Pay attention to the `QEMU_PLUGINDIR` cmake option - it must be set to `qemu-kvm` on RHEL.
@ -357,21 +352,13 @@ and calculate disk offsets almost by hand. This will be fixed in near future.
  with lazy fsync, but prepare for inferior single-thread latency.
 - Get a fast network (at least 10 Gbit/s).
 - Disable CPU powersaving: `cpupower idle-set -D 0 && cpupower frequency-set -g performance`.
- On the monitor hosts:
+- Check `/usr/lib/vitastor/mon/make-units.sh` and `/usr/lib/vitastor/mon/make-osd.sh` and
-  - Edit variables at the top of `/usr/lib/vitastor/mon/make-units.sh` to desired values.
+  put desired values into the variables at the top of these files.
 - Create systemd units for the monitor and etcd: `/usr/lib/vitastor/mon/make-units.sh`
 - Put etcd_address and osd_network into `/etc/vitastor/vitastor.conf`. Example:
  ```
  {
    "etcd_address": ["10.200.1.10:2379","10.200.1.11:2379","10.200.1.12:2379"],
    "osd_network": "10.200.1.0/24"
  }
  ```
 - Create systemd units for your OSDs: `/usr/lib/vitastor/mon/make-osd.sh /dev/disk/by-partuuid/XXX [/dev/disk/by-partuuid/YYY ...]`
- You can change OSD configuration in units or in `vitastor.conf`. Notable configuration variables:
+- You can edit the units and change OSD configuration. Notable configuration variables:
  - `disable_data_fsync 1` - only safe with server-grade drives with capacitors.
  - `immediate_commit all` - use this if all your drives are server-grade.
    If all OSDs have it set to all then you should also put the same value in etcd into /vitastor/config/global
  - `disable_device_lock 1` - only required if you run multiple OSDs on one block device.
  - `flusher_count 256` - flusher is a micro-thread that removes old data from the journal.
    You don't have to worry about this parameter anymore, 256 is enough.
@ -454,10 +441,10 @@ just like in qemu-img.
 ### Remove inode
-Use vitastor-rm / vitastor-cli rm-data. For example:
+Use vitastor-rm. For example:
 ```
-vitastor-cli rm-data --etcd_address 10.115.0.10:2379/v3 --pool 1 --inode 1 --parallel_osds 16 --iodepth 32
+vitastor-rm --etcd_address 10.115.0.10:2379/v3 --pool 1 --inode 1 --parallel_osds 16 --iodepth 32
 ```
 ### NBD
@ -487,73 +474,6 @@ for i in ./???-*.yaml; do kubectl apply -f $i; done
 After that you'll be able to create PersistentVolumes. See example in [csi/deploy/example-pvc.yaml](csi/deploy/example-pvc.yaml).
 ### OpenStack
 To enable Vitastor support in an OpenStack installation:
 - Install vitastor-client, patched QEMU and libvirt packages from Vitastor DEB or RPM repository
 - Use `patches/nova-21.diff` or `patches/nova-23.diff` to patch your Nova installation.
  Patch 21 fits Nova 21-22, patch 23 fits Nova 23-24.
 - Install `patches/cinder-vitastor.py` as `..../cinder/volume/drivers/vitastor.py`
 - Define a volume type in cinder.conf (see below)
 - Block network access from VMs to Vitastor network (to OSDs and etcd), because Vitastor doesn't support authentication (yet)
 - Restart Cinder and Nova
 Cinder volume type configuration example:
 ```
 [DEFAULT]
 enabled_backends = lvmdriver-1, vitastor-testcluster
 # ...
 [vitastor-testcluster]
 volume_driver = cinder.volume.drivers.vitastor.VitastorDriver
 volume_backend_name = vitastor-testcluster
 image_volume_cache_enabled = True
 volume_clear = none
 vitastor_etcd_address = 192.168.7.2:2379
 vitastor_etcd_prefix =
 vitastor_config_path = /etc/vitastor/vitastor.conf
 vitastor_pool_id = 1
 image_upload_use_cinder_backend = True
 ```
 To put Glance images in Vitastor, use [https://docs.openstack.org/cinder/pike/admin/blockstorage-volume-backed-image.html](volume-backed images),
 although the support has not been verified yet.
 ### Proxmox
 To enable Vitastor support in Proxmox Virtual Environment (6.4 and 7.1 are supported):
 - Add the corresponding Vitastor Debian repository into sources.list on Proxmox hosts
  (buster for 6.4, bullseye for 7.1)
 - Install vitastor-client, pve-qemu-kvm, pve-storage-vitastor (* or see note) packages from Vitastor repository
 - Define storage in `/etc/pve/storage.cfg` (see below)
 - Block network access from VMs to Vitastor network (to OSDs and etcd), because Vitastor doesn't support authentication (yet)
 - Restart pvedaemon: `systemctl restart pvedaemon`
 `/etc/pve/storage.cfg` example (the only required option is vitastor_pool, all others
 are listed below with their default values):
 ```
 vitastor: vitastor
    # pool to put new images into
    vitastor_pool testpool
    # path to the configuration file
    vitastor_config_path /etc/vitastor/vitastor.conf
    # etcd address(es), required only if missing in the configuration file
    vitastor_etcd_address 192.168.7.2:2379/v3
    # prefix for keys in etcd
    vitastor_etcd_prefix /vitastor
    # prefix for images
    vitastor_prefix pve/
    # use NBD mounter (only required for containers)
    vitastor_nbd 0
 ```
 \* Note: you can also manually copy [patches/PVE_VitastorPlugin.pm](patches/PVE_VitastorPlugin.pm) to Proxmox hosts
 as `/usr/share/perl5/PVE/Storage/Custom/VitastorPlugin.pm` instead of installing pve-storage-vitastor.
 ## Known Problems
 - Object deletion requests may currently lead to 'incomplete' objects in EC pools
--- a/cinder-driver/libvirt-5.0-vitastor.diff
+++ b/cinder-driver/libvirt-5.0-vitastor.diff
@ -1,4 +1,4 @@
-commit 7f01510ef207940b07fac4f5fc8b9f1580b443aa
+commit bd283191b3e7a4c6d1c100d3d96e348a1ebffe55
 Author: Vitaliy Filippov <vitalif@yourcmc.ru>
 Date:   Sun Jun 27 12:52:40 2021 +0300
@ -65,38 +65,10 @@ index 4bf2b5f..dbc011b 100644
 int                     virConnectListAllStoragePools(virConnectPtr conn,
 diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
-index 222bb8c..2c30c55 100644
+index 222bb8c..685d255 100644
 --- a/src/conf/domain_conf.c
 +++ b/src/conf/domain_conf.c
-@@ -4667,8 +4667,7 @@ virDomainDeviceDefPostParseCommon(virDomainDeviceDefPtr dev,
+@@ -8653,6 +8653,10 @@ virDomainDiskSourceNetworkParse(xmlNodePtr node,
     if (dev->type == VIR_DOMAIN_DEVICE_DISK) {
         virDomainDiskDefPtr disk = dev->data.disk;
 -        /* internal snapshots and config files are currently supported
 -         * only with rbd: */
 +        /* internal snapshots are currently supported only with rbd: */
         if (virStorageSourceGetActualType(disk->src) != VIR_STORAGE_TYPE_NETWORK &&
             disk->src->protocol != VIR_STORAGE_NET_PROTOCOL_RBD) {
             if (disk->src->snapshot) {
@@ -4677,11 +4676,15 @@ virDomainDeviceDefPostParseCommon(virDomainDeviceDefPtr dev,
                                  "only with 'rbd' disks"));
                 return -1;
             }
 -
 +        }
 +        /* config files are currently supported only with rbd and vitastor: */
 +        if (virStorageSourceGetActualType(disk->src) != VIR_STORAGE_TYPE_NETWORK &&
 +            disk->src->protocol != VIR_STORAGE_NET_PROTOCOL_RBD &&
 +            disk->src->protocol != VIR_STORAGE_NET_PROTOCOL_VITASTOR) {
             if (disk->src->configFile) {
                 virReportError(VIR_ERR_XML_ERROR, "%s",
                                _("<config> element is currently supported "
 -                                 "only with 'rbd' disks"));
 +                                 "only with 'rbd' and 'vitastor' disks"));
                 return -1;
             }
         }
@@ -8653,6 +8656,10 @@ virDomainDiskSourceNetworkParse(xmlNodePtr node,
         goto cleanup;
     }
@ -107,7 +79,7 @@ index 222bb8c..2c30c55 100644
     if ((haveTLS = virXMLPropString(node, "tls")) &&
         (src->haveTLS = virTristateBoolTypeFromString(haveTLS)) <= 0) {
         virReportError(VIR_ERR_XML_ERROR,
-@@ -23849,6 +23856,10 @@ virDomainDiskSourceFormatNetwork(virBufferPtr attrBuf,
+@@ -23849,6 +23853,10 @@ virDomainDiskSourceFormatNetwork(virBufferPtr attrBuf,
     virBufferEscapeString(attrBuf, " name='%s'", path ? path : src->path);
@ -118,7 +90,7 @@ index 222bb8c..2c30c55 100644
     VIR_FREE(path);
     if (src->haveTLS != VIR_TRISTATE_BOOL_ABSENT &&
-@@ -30930,6 +30941,7 @@ virDomainDiskTranslateSourcePool(virDomainDiskDefPtr def)
+@@ -30930,6 +30938,7 @@ virDomainDiskTranslateSourcePool(virDomainDiskDefPtr def)
     case VIR_STORAGE_POOL_MPATH:
     case VIR_STORAGE_POOL_RBD:
@ -244,7 +216,7 @@ index 73e988a..ab7bb81 100644
     case VIR_STORAGE_NET_PROTOCOL_NONE:
         virReportError(VIR_ERR_NO_SUPPORT,
 diff --git a/src/qemu/qemu_block.c b/src/qemu/qemu_block.c
-index cbf0aa4..f0ca9e7 100644
+index cbf0aa4..096700d 100644
 --- a/src/qemu/qemu_block.c
 +++ b/src/qemu/qemu_block.c
@@ -959,6 +959,42 @@ qemuBlockStorageSourceGetRBDProps(virStorageSourcePtr src)
@ -273,9 +245,9 @@ index cbf0aa4..f0ca9e7 100644
 +
 +    if (virJSONValueObjectCreate(&ret,
 +                                 "s:driver", "vitastor",
-+                                 "S:etcd-host", etcd,
+                                 "S:etcd_host", etcd,
-+                                 "S:etcd-prefix", src->relPath,
+                                 "S:etcd_prefix", src->relPath,
-+                                 "S:config-path", src->configFile,
+                                 "S:config_path", src->configFile,
 +                                 "s:image", src->path,
 +                                 NULL) < 0)
 +        goto cleanup;
@ -303,7 +275,7 @@ index cbf0aa4..f0ca9e7 100644
             if (!(fileprops = qemuBlockStorageSourceGetSheepdogProps(src)))
                 return NULL;
 diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
-index 822d5f8..abec34e 100644
+index 822d5f8..e375cef 100644
 --- a/src/qemu/qemu_command.c
 +++ b/src/qemu/qemu_command.c
@@ -975,6 +975,43 @@ qemuBuildNetworkDriveStr(virStorageSourcePtr src,
@ -321,7 +293,7 @@ index 822d5f8..abec34e 100644
 +            virBufferStrcat(&buf, "vitastor:image=", src->path, NULL);
 +
 +            if (src->nhosts > 0) {
-+                virBufferAddLit(&buf, ":etcd-host=");
+                virBufferAddLit(&buf, ":etcd_host=");
 +                for (i = 0; i < src->nhosts; i++) {
 +                    if (i)
 +                        virBufferAddLit(&buf, ",");
@ -339,10 +311,10 @@ index 822d5f8..abec34e 100644
 +            }
 +
 +            if (src->configFile)
-+                virBufferEscape(&buf, '\\', ":", ":config-path=%s", src->configFile);
+                virBufferEscape(&buf, '\\', ":", ":config_path=%s", src->configFile);
 +
 +            if (src->relPath)
-+                virBufferEscape(&buf, '\\', ":", ":etcd-prefix=%s", src->relPath);
+                virBufferEscape(&buf, '\\', ":", ":etcd_prefix=%s", src->relPath);
 +
 +            ret = virBufferContentAndReset(&buf);
 +            break;
@ -415,7 +387,7 @@ index 4a13e90..33301c7 100644
             ignore_value(VIR_STRDUP(stable_path, data->path));
             break;
 diff --git a/src/util/virstoragefile.c b/src/util/virstoragefile.c
-index bd4b027..8454906 100644
+index bd4b027..b323cd6 100644
 --- a/src/util/virstoragefile.c
 +++ b/src/util/virstoragefile.c
@@ -84,7 +84,8 @@ VIR_ENUM_IMPL(virStorageNetProtocol, VIR_STORAGE_NET_PROTOCOL_LAST,
@ -466,16 +438,16 @@ index bd4b027..8454906 100644
 +        if (STRPREFIX(p, "image=")) {
 +            if (VIR_STRDUP(src->path, p + strlen("image=")) < 0)
 +                return -1;
-+        } else if (STRPREFIX(p, "etcd-prefix=")) {
+        } else if (STRPREFIX(p, "etcd_prefix=")) {
-+            if (VIR_STRDUP(src->relPath, p + strlen("etcd-prefix=")) < 0)
+            if (VIR_STRDUP(src->relPath, p + strlen("etcd_prefix=")) < 0)
 +                return -1;
-+        } else if (STRPREFIX(p, "config-path=")) {
+        } else if (STRPREFIX(p, "config_file=")) {
-+            if (VIR_STRDUP(src->configFile, p + strlen("config-path=")) < 0)
+            if (VIR_STRDUP(src->configFile, p + strlen("config_file=")) < 0)
 +                return -1;
-+        } else if (STRPREFIX(p, "etcd-host=")) {
+        } else if (STRPREFIX(p, "etcd_host=")) {
 +            char *h, *sep;
 +
-+            h = p + strlen("etcd-host=");
+            h = p + strlen("etcd_host=");
 +            while (h < e) {
 +                for (sep = h; sep < e; ++sep) {
 +                    if (*sep == '\\' && (sep[1] == ',' ||
@ -535,8 +507,8 @@ index bd4b027..8454906 100644
 +{
 +    const char *filename;
 +    const char *image = virJSONValueObjectGetString(json, "image");
-+    const char *conf = virJSONValueObjectGetString(json, "config-path");
+    const char *conf = virJSONValueObjectGetString(json, "config_path");
-+    const char *etcd_prefix = virJSONValueObjectGetString(json, "etcd-prefix");
+    const char *etcd_prefix = virJSONValueObjectGetString(json, "etcd_prefix");
 +    virJSONValuePtr servers = virJSONValueObjectGetArray(json, "server");
 +    size_t nservers;
 +    size_t i;
--- a/cinder-driver/libvirt-7.0-vitastor.diff
+++ b/cinder-driver/libvirt-7.0-vitastor.diff
@ -1,4 +1,4 @@
-commit 4e74c622884e2585b2cfcdf322fbd2bff6de41ca
+commit 41cdfe8317d98f70aadedfdbb381effed2641bdd
 Author: Vitaliy Filippov <vitalif@yourcmc.ru>
 Date:   Fri Jul 9 01:31:57 2021 +0300
@ -65,38 +65,10 @@ index 089e1e0..d7e7ef4 100644
 int                     virConnectListAllStoragePools(virConnectPtr conn,
 diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
-index 01b7187..645c758 100644
+index 01b7187..c6e9702 100644
 --- a/src/conf/domain_conf.c
 +++ b/src/conf/domain_conf.c
-@@ -5230,8 +5230,7 @@ virDomainDiskDefPostParse(virDomainDiskDefPtr disk,
+@@ -8261,7 +8261,8 @@ virDomainDiskSourceNetworkParse(xmlNodePtr node,
                           const virDomainDef *def,
                           virDomainXMLOptionPtr xmlopt)
 {
 -    /* internal snapshots and config files are currently supported
 -     * only with rbd: */
 +    /* internal snapshots are currently supported only with rbd: */
     if (virStorageSourceGetActualType(disk->src) != VIR_STORAGE_TYPE_NETWORK &&
         disk->src->protocol != VIR_STORAGE_NET_PROTOCOL_RBD) {
         if (disk->src->snapshot) {
@@ -5240,11 +5239,15 @@ virDomainDiskDefPostParse(virDomainDiskDefPtr disk,
                              "only with 'rbd' disks"));
             return -1;
         }
 -
 +    }
 +    /* config files are currently supported only with rbd and vitastor: */
 +    if (virStorageSourceGetActualType(disk->src) != VIR_STORAGE_TYPE_NETWORK &&
 +        disk->src->protocol != VIR_STORAGE_NET_PROTOCOL_RBD &&
 +        disk->src->protocol != VIR_STORAGE_NET_PROTOCOL_VITASTOR) {
         if (disk->src->configFile) {
             virReportError(VIR_ERR_XML_ERROR, "%s",
                            _("<config> element is currently supported "
 -                             "only with 'rbd' disks"));
 +                             "only with 'rbd' and 'vitastor' disks"));
             return -1;
         }
     }
@@ -8261,7 +8264,8 @@ virDomainDiskSourceNetworkParse(xmlNodePtr node,
     src->configFile = virXPathString("string(./config/@file)", ctxt);
     if (src->protocol == VIR_STORAGE_NET_PROTOCOL_HTTP ||
@ -106,7 +78,7 @@ index 01b7187..645c758 100644
         src->query = virXMLPropString(node, "query");
     if (virDomainStorageNetworkParseHosts(node, ctxt, &src->hosts, &src->nhosts) < 0)
-@@ -31392,6 +31396,7 @@ virDomainStorageSourceTranslateSourcePool(virStorageSourcePtr src,
+@@ -31392,6 +31393,7 @@ virDomainStorageSourceTranslateSourcePool(virStorageSourcePtr src,
     case VIR_STORAGE_POOL_MPATH:
     case VIR_STORAGE_POOL_RBD:
@ -244,7 +216,7 @@ index 17b93d0..c5a0084 100644
     case VIR_STORAGE_NET_PROTOCOL_NONE:
         virReportError(VIR_ERR_NO_SUPPORT,
 diff --git a/src/qemu/qemu_block.c b/src/qemu/qemu_block.c
-index f9c6da2..d837a05 100644
+index f9c6da2..922dde5 100644
 --- a/src/qemu/qemu_block.c
 +++ b/src/qemu/qemu_block.c
@@ -938,6 +938,38 @@ qemuBlockStorageSourceGetRBDProps(virStorageSourcePtr src,
@ -272,9 +244,9 @@ index f9c6da2..d837a05 100644
 +    }
 +
 +    if (virJSONValueObjectCreate(&ret,
-+                                 "S:etcd-host", etcd,
+                                 "S:etcd_host", etcd,
-+                                 "S:etcd-prefix", src->query,
+                                 "S:etcd_prefix", src->query,
-+                                 "S:config-path", src->configFile,
+                                 "S:config_path", src->configFile,
 +                                 "s:image", src->path,
 +                                 NULL) < 0)
 +        return NULL;
@ -321,7 +293,7 @@ index f9c6da2..d837a05 100644
             driver = "sheepdog";
             if (!(location = qemuBlockStorageSourceGetSheepdogProps(src)))
 diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
-index 6f970a3..4c03fb8 100644
+index 6f970a3..10b39ca 100644
 --- a/src/qemu/qemu_command.c
 +++ b/src/qemu/qemu_command.c
@@ -1034,6 +1034,43 @@ qemuBuildNetworkDriveStr(virStorageSourcePtr src,
@ -339,7 +311,7 @@ index 6f970a3..4c03fb8 100644
 +            virBufferStrcat(&buf, "vitastor:image=", src->path, NULL);
 +
 +            if (src->nhosts > 0) {
-+                virBufferAddLit(&buf, ":etcd-host=");
+                virBufferAddLit(&buf, ":etcd_host=");
 +                for (i = 0; i < src->nhosts; i++) {
 +                    if (i)
 +                        virBufferAddLit(&buf, ",");
@ -357,10 +329,10 @@ index 6f970a3..4c03fb8 100644
 +            }
 +
 +            if (src->configFile)
-+                virBufferEscape(&buf, '\\', ":", ":config-path=%s", src->configFile);
+                virBufferEscape(&buf, '\\', ":", ":config_path=%s", src->configFile);
 +
 +            if (src->query)
-+                virBufferEscape(&buf, '\\', ":", ":etcd-prefix=%s", src->query);
+                virBufferEscape(&buf, '\\', ":", ":etcd_prefix=%s", src->query);
 +
 +            ret = virBufferContentAndReset(&buf);
 +            break;
@ -443,7 +415,7 @@ index 29c4c86..a27ad94 100644
     case VIR_STORAGE_POOL_LOGICAL:
     case VIR_STORAGE_POOL_DISK:
 diff --git a/src/util/virstoragefile.c b/src/util/virstoragefile.c
-index 0d3c2af..edb7f9e 100644
+index 0d3c2af..36e3afc 100644
 --- a/src/util/virstoragefile.c
 +++ b/src/util/virstoragefile.c
@@ -91,6 +91,7 @@ VIR_ENUM_IMPL(virStorageNetProtocol,
@ -490,14 +462,14 @@ index 0d3c2af..edb7f9e 100644
 +
 +        if (STRPREFIX(p, "image=")) {
 +            src->path = g_strdup(p + strlen("image="));
-+        } else if (STRPREFIX(p, "etcd-prefix=")) {
+        } else if (STRPREFIX(p, "etcd_prefix=")) {
-+            src->query = g_strdup(p + strlen("etcd-prefix="));
+            src->query = g_strdup(p + strlen("etcd_prefix="));
-+        } else if (STRPREFIX(p, "config-path=")) {
+        } else if (STRPREFIX(p, "config_file=")) {
-+            src->configFile = g_strdup(p + strlen("config-path="));
+            src->configFile = g_strdup(p + strlen("config_file="));
-+        } else if (STRPREFIX(p, "etcd-host=")) {
+        } else if (STRPREFIX(p, "etcd_host=")) {
 +            char *h, *sep;
 +
-+            h = p + strlen("etcd-host=");
+            h = p + strlen("etcd_host=");
 +            while (h < e) {
 +                for (sep = h; sep < e; ++sep) {
 +                    if (*sep == '\\' && (sep[1] == ',' ||
@ -554,8 +526,8 @@ index 0d3c2af..edb7f9e 100644
 +{
 +    const char *filename;
 +    const char *image = virJSONValueObjectGetString(json, "image");
-+    const char *conf = virJSONValueObjectGetString(json, "config-path");
+    const char *conf = virJSONValueObjectGetString(json, "config_path");
-+    const char *etcd_prefix = virJSONValueObjectGetString(json, "etcd-prefix");
+    const char *etcd_prefix = virJSONValueObjectGetString(json, "etcd_prefix");
 +    virJSONValuePtr servers = virJSONValueObjectGetArray(json, "server");
 +    size_t nservers;
 +    size_t i;
--- a/cinder-driver/libvirt-7.5-vitastor.diff
+++ b/cinder-driver/libvirt-7.5-vitastor.diff
@ -1,4 +1,4 @@
-commit c97d7f2bfb7798f0d68bdba2646245dcfb940efa
+commit c6e1958a1b4974828e8e5852beb252ce6594e670
 Author: Vitaliy Filippov <vitalif@yourcmc.ru>
 Date:   Mon Jun 28 01:20:19 2021 +0300
@ -86,37 +86,6 @@ index d78f846..f7222e3 100644
     case VIR_STORAGE_POOL_SHEEPDOG:
     case VIR_STORAGE_POOL_GLUSTER:
     case VIR_STORAGE_POOL_LAST:
 diff --git a/src/conf/domain_validate.c b/src/conf/domain_validate.c
 index 2124d25..6acc6fa 100644
 --- a/src/conf/domain_validate.c
 +++ b/src/conf/domain_validate.c
@@ -470,7 +470,7 @@ virDomainDiskDefValidateSourceChainOne(const virStorageSource *src)
         }
     }
 -    /* internal snapshots and config files are currently supported only with rbd: */
 +    /* internal snapshots are currently supported only with rbd: */
     if (virStorageSourceGetActualType(src) != VIR_STORAGE_TYPE_NETWORK &&
         src->protocol != VIR_STORAGE_NET_PROTOCOL_RBD) {
         if (src->snapshot) {
@@ -479,11 +479,15 @@ virDomainDiskDefValidateSourceChainOne(const virStorageSource *src)
                              "only with 'rbd' disks"));
             return -1;
         }
 -
 +    }
 +    /* config files are currently supported only with rbd and vitastor: */
 +    if (virStorageSourceGetActualType(src) != VIR_STORAGE_TYPE_NETWORK &&
 +        src->protocol != VIR_STORAGE_NET_PROTOCOL_RBD &&
 +        src->protocol != VIR_STORAGE_NET_PROTOCOL_VITASTOR) {
         if (src->configFile) {
             virReportError(VIR_ERR_XML_ERROR, "%s",
                            _("<config> element is currently supported "
 -                             "only with 'rbd' disks"));
 +                             "only with 'rbd' and 'vitastor' disks"));
             return -1;
         }
     }
 diff --git a/src/conf/storage_conf.c b/src/conf/storage_conf.c
 index 2aa9a3d..166ca1f 100644
 --- a/src/conf/storage_conf.c
@ -279,7 +248,7 @@ index c0905b0..c172378 100644
     case VIR_STORAGE_NET_PROTOCOL_NONE:
         virReportError(VIR_ERR_NO_SUPPORT,
 diff --git a/src/qemu/qemu_block.c b/src/qemu/qemu_block.c
-index 6627d04..f769d24 100644
+index 6627d04..c33f428 100644
 --- a/src/qemu/qemu_block.c
 +++ b/src/qemu/qemu_block.c
@@ -928,6 +928,38 @@ qemuBlockStorageSourceGetRBDProps(virStorageSource *src,
@ -307,9 +276,9 @@ index 6627d04..f769d24 100644
 +    }
 +
 +    if (virJSONValueObjectCreate(&ret,
-+                                 "S:etcd-host", etcd,
+                                 "S:etcd_host", etcd,
-+                                 "S:etcd-prefix", src->query,
+                                 "S:etcd_prefix", src->query,
-+                                 "S:config-path", src->configFile,
+                                 "S:config_path", src->configFile,
 +                                 "s:image", src->path,
 +                                 NULL) < 0)
 +        return NULL;
@ -356,7 +325,7 @@ index 6627d04..f769d24 100644
             driver = "sheepdog";
             if (!(location = qemuBlockStorageSourceGetSheepdogProps(src)))
 diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
-index ea51369..d714597 100644
+index ea51369..8258632 100644
 --- a/src/qemu/qemu_command.c
 +++ b/src/qemu/qemu_command.c
@@ -1074,6 +1074,43 @@ qemuBuildNetworkDriveStr(virStorageSource *src,
@ -374,7 +343,7 @@ index ea51369..d714597 100644
 +            virBufferStrcat(&buf, "vitastor:image=", src->path, NULL);
 +
 +            if (src->nhosts > 0) {
-+                virBufferAddLit(&buf, ":etcd-host=");
+                virBufferAddLit(&buf, ":etcd_host=");
 +                for (i = 0; i < src->nhosts; i++) {
 +                    if (i)
 +                        virBufferAddLit(&buf, ",");
@ -392,10 +361,10 @@ index ea51369..d714597 100644
 +            }
 +
 +            if (src->configFile)
-+                virBufferEscape(&buf, '\\', ":", ":config-path=%s", src->configFile);
+                virBufferEscape(&buf, '\\', ":", ":config_path=%s", src->configFile);
 +
 +            if (src->query)
-+                virBufferEscape(&buf, '\\', ":", ":etcd-prefix=%s", src->query);
+                virBufferEscape(&buf, '\\', ":", ":etcd_prefix=%s", src->query);
 +
 +            ret = virBufferContentAndReset(&buf);
 +            break;
@ -466,7 +435,7 @@ index c2ff4b8..70d0689 100644
         case VIR_STORAGE_POOL_ZFS:
         case VIR_STORAGE_POOL_LAST:
 diff --git a/src/storage_file/storage_source_backingstore.c b/src/storage_file/storage_source_backingstore.c
-index e48ae72..2017ccc 100644
+index e48ae72..d7a9b72 100644
 --- a/src/storage_file/storage_source_backingstore.c
 +++ b/src/storage_file/storage_source_backingstore.c
@@ -284,6 +284,75 @@ virStorageSourceParseRBDColonString(const char *rbdstr,
@ -505,14 +474,14 @@ index e48ae72..2017ccc 100644
 +
 +        if (STRPREFIX(p, "image=")) {
 +            src->path = g_strdup(p + strlen("image="));
-+        } else if (STRPREFIX(p, "etcd-prefix=")) {
+        } else if (STRPREFIX(p, "etcd_prefix=")) {
-+            src->query = g_strdup(p + strlen("etcd-prefix="));
+            src->query = g_strdup(p + strlen("etcd_prefix="));
-+        } else if (STRPREFIX(p, "config-path=")) {
+        } else if (STRPREFIX(p, "config_file=")) {
-+            src->configFile = g_strdup(p + strlen("config-path="));
+            src->configFile = g_strdup(p + strlen("config_file="));
-+        } else if (STRPREFIX(p, "etcd-host=")) {
+        } else if (STRPREFIX(p, "etcd_host=")) {
 +            char *h, *sep;
 +
-+            h = p + strlen("etcd-host=");
+            h = p + strlen("etcd_host=");
 +            while (h < e) {
 +                for (sep = h; sep < e; ++sep) {
 +                    if (*sep == '\\' && (sep[1] == ',' ||
@ -569,8 +538,8 @@ index e48ae72..2017ccc 100644
 +{
 +    const char *filename;
 +    const char *image = virJSONValueObjectGetString(json, "image");
-+    const char *conf = virJSONValueObjectGetString(json, "config-path");
+    const char *conf = virJSONValueObjectGetString(json, "config_path");
-+    const char *etcd_prefix = virJSONValueObjectGetString(json, "etcd-prefix");
+    const char *etcd_prefix = virJSONValueObjectGetString(json, "etcd_prefix");
 +    virJSONValue *servers = virJSONValueObjectGetArray(json, "server");
 +    size_t nservers;
 +    size_t i;
--- a/cinder-driver/libvirt-example.xml
+++ b/cinder-driver/libvirt-example.xml
@ -15,10 +15,9 @@
      <target dev='vda' bus='virtio' />
      <driver name='qemu' type='raw' />
      <!-- name is Vitastor image name -->
      <!-- query (optional) is Vitastor's etcd_prefix -->
      <source protocol='vitastor' name='debian9' query='/vitastor'>
      <!-- config (optional) is the path to Vitastor's configuration file -->
-        <config file='/etc/vitastor/vitastor.conf' />
+      <!-- query (optional) is Vitastor's etcd_prefix -->
      <source protocol='vitastor' name='debian9' query='/vitastor' config='/etc/vitastor/vitastor.conf'>
        <!-- hosts = etcd addresses -->
        <host name='192.168.7.2' port='2379' />
      </source>
--- a/csi/.dockerignore
+++ b/csi/.dockerignore
@ -1,2 +1,3 @@
 vitastor-csi
 go.sum
 Dockerfile
--- a/csi/Dockerfile
+++ b/csi/Dockerfile
@ -1,7 +1,7 @@
 # Compile stage
 FROM golang:buster AS build
-ADD go.sum go.mod /app/
+ADD go.mod /app/
 RUN cd /app; CGO_ENABLED=1 GOOS=linux GOARCH=amd64 go mod download -x
 ADD . /app
 RUN perl -i -e '$/ = undef; while(<>) { s/\n\s*(\{\s*\n)/$1\n/g; s/\}(\s*\n\s*)else\b/$1} else/g; print; }' `find /app -name '*.go'`
--- a/csi/Makefile
+++ b/csi/Makefile
@ -1,4 +1,4 @@
-VERSION ?= v0.6.10
+VERSION ?= v0.6.4
 all: build push
--- a/csi/deploy/004-csi-nodeplugin.yaml
+++ b/csi/deploy/004-csi-nodeplugin.yaml
@ -49,7 +49,7 @@ spec:
            capabilities:
              add: ["SYS_ADMIN"]
            allowPrivilegeEscalation: true
-          image: vitalif/vitastor-csi:v0.6.10
+          image: vitalif/vitastor-csi:v0.6.4
          args:
            - "--node=$(NODE_ID)"
            - "--endpoint=$(CSI_ENDPOINT)"
--- a/csi/deploy/007-csi-provisioner.yaml
+++ b/csi/deploy/007-csi-provisioner.yaml
@ -116,7 +116,7 @@ spec:
            privileged: true
            capabilities:
              add: ["SYS_ADMIN"]
-          image: vitalif/vitastor-csi:v0.6.10
+          image: vitalif/vitastor-csi:v0.6.4
          args:
            - "--node=$(NODE_ID)"
            - "--endpoint=$(CSI_ENDPOINT)"
--- a/csi/go.sum
+++ b/csi/go.sum
@ -1,448 +0,0 @@
 cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
 cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU=
 cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU=
 cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY=
 cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc=
 cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0=
 cloud.google.com/go v0.51.0/go.mod h1:hWtGJ6gnXH+KgDv+V0zFGDvpi07n3z8ZNj3T1RW0Gcw=
 cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o=
 cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7TKLgZqpHYE=
 cloud.google.com/go/pubsub v1.0.1/go.mod h1:R0Gpsv3s54REJCy4fxDixWD93lHJMoZTyQ2kNxGRt3I=
 cloud.google.com/go/storage v1.0.0/go.mod h1:IhtSnM/ZTZV8YYJWCY8RULGVqBDmpoyjwiyrjsg+URw=
 dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
 github.com/Azure/go-ansiterm v0.0.0-20170929234023-d6e3b3328b78/go.mod h1:LmzpDX56iTiv29bbRTIsUNlaFfuhWRQBWjQdVyAevI8=
 github.com/Azure/go-autorest/autorest v0.9.0/go.mod h1:xyHB1BMZT0cuDHU7I0+g046+BFDTQ8rEZB0s4Yfa6bI=
 github.com/Azure/go-autorest/autorest v0.9.6/go.mod h1:/FALq9T/kS7b5J5qsQ+RSTUdAmGFqi0vUdVNNx8q630=
 github.com/Azure/go-autorest/autorest/adal v0.5.0/go.mod h1:8Z9fGy2MpX0PvDjB1pEgQTmVqjGhiHBW7RJJEciWzS0=
 github.com/Azure/go-autorest/autorest/adal v0.8.2/go.mod h1:ZjhuQClTqx435SRJ2iMlOxPYt3d2C/T/7TiQCVZSn3Q=
 github.com/Azure/go-autorest/autorest/date v0.1.0/go.mod h1:plvfp3oPSKwf2DNjlBjWF/7vwR+cUD/ELuzDCXwHUVA=
 github.com/Azure/go-autorest/autorest/date v0.2.0/go.mod h1:vcORJHLJEh643/Ioh9+vPmf1Ij9AEBM5FuBIXLmIy0g=
 github.com/Azure/go-autorest/autorest/mocks v0.1.0/go.mod h1:OTyCOPRA2IgIlWxVYxBee2F5Gr4kF2zd2J5cFRaIDN0=
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 google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
 google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=
 google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQJ+fmap5saPgwCLgHXTUD7jkjRqWcaiX5VyM=
 google.golang.org/protobuf v1.20.1-0.20200309200217-e05f789c0967/go.mod h1:A+miEFZTKqfCUM6K7xSMQL9OKL/b6hQv+e19PK+JZNE=
 google.golang.org/protobuf v1.21.0/go.mod h1:47Nbq4nVaFHyn7ilMalzfO3qCViNmqZ2kzikPIcrTAo=
 google.golang.org/protobuf v1.22.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
 google.golang.org/protobuf v1.23.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
 google.golang.org/protobuf v1.23.1-0.20200526195155-81db48ad09cc/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
 google.golang.org/protobuf v1.24.0 h1:UhZDfRO8JRQru4/+LlLE0BRKGF8L+PICnvYZmx/fEGA=
 google.golang.org/protobuf v1.24.0/go.mod h1:r/3tXBNzIEhYS9I1OUVjXDlt8tc493IdKGjtUeSXeh4=
 gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 h1:YR8cESwS4TdDjEe65xsg0ogRM/Nc3DYOhEAlW+xobZo=
 gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
 gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
 gopkg.in/inf.v0 v0.9.1/go.mod h1:cWUDdTG/fYaXco+Dcufb5Vnc6Gp2YChqWtbxRZE0mXw=
 gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
 gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.3/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.5/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.8 h1:obN1ZagJSUGI0Ek/LBmuj4SNLPfIny3KsKFopxRdj10=
 gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
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 gotest.tools/v3 v3.0.2/go.mod h1:3SzNCllyD9/Y+b5r9JIKQ474KzkZyqLqEfYqMsX94Bk=
 honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190106161140-3f1c8253044a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190418001031-e561f6794a2a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
 k8s.io/api v0.19.0/go.mod h1:I1K45XlvTrDjmj5LoM5LuP/KYrhWbjUKT/SoPG0qTjw=
 k8s.io/apimachinery v0.19.0/go.mod h1:DnPGDnARWFvYa3pMHgSxtbZb7gpzzAZ1pTfaUNDVlmA=
 k8s.io/client-go v0.19.0/go.mod h1:H9E/VT95blcFQnlyShFgnFT9ZnJOAceiUHM3MlRC+mU=
 k8s.io/component-base v0.19.0/go.mod h1:dKsY8BxkA+9dZIAh2aWJLL/UdASFDNtGYTCItL4LM7Y=
 k8s.io/gengo v0.0.0-20200413195148-3a45101e95ac/go.mod h1:ezvh/TsK7cY6rbqRK0oQQ8IAqLxYwwyPxAX1Pzy0ii0=
 k8s.io/klog v1.0.0 h1:Pt+yjF5aB1xDSVbau4VsWe+dQNzA0qv1LlXdC2dF6Q8=
 k8s.io/klog v1.0.0/go.mod h1:4Bi6QPql/J/LkTDqv7R/cd3hPo4k2DG6Ptcz060Ez5I=
 k8s.io/klog/v2 v2.0.0/go.mod h1:PBfzABfn139FHAV07az/IF9Wp1bkk3vpT2XSJ76fSDE=
 k8s.io/klog/v2 v2.2.0 h1:XRvcwJozkgZ1UQJmfMGpvRthQHOvihEhYtDfAaxMz/A=
 k8s.io/klog/v2 v2.2.0/go.mod h1:Od+F08eJP+W3HUb4pSrPpgp9DGU4GzlpG/TmITuYh/Y=
 k8s.io/kube-openapi v0.0.0-20200805222855-6aeccd4b50c6/go.mod h1:UuqjUnNftUyPE5H64/qeyjQoUZhGpeFDVdxjTeEVN2o=
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 k8s.io/utils v0.0.0-20210305010621-2afb4311ab10 h1:u5rPykqiCpL+LBfjRkXvnK71gOgIdmq3eHUEkPrbeTI=
 k8s.io/utils v0.0.0-20210305010621-2afb4311ab10/go.mod h1:jPW/WVKK9YHAvNhRxK0md/EJ228hCsBRufyofKtW8HA=
 rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=
 sigs.k8s.io/structured-merge-diff/v4 v4.0.1/go.mod h1:bJZC9H9iH24zzfZ/41RGcq60oK1F7G282QMXDPYydCw=
 sigs.k8s.io/yaml v1.1.0/go.mod h1:UJmg0vDUVViEyp3mgSv9WPwZCDxu4rQW1olrI1uml+o=
 sigs.k8s.io/yaml v1.2.0 h1:kr/MCeFWJWTwyaHoR9c8EjH9OumOmoF9YGiZd7lFm/Q=
 sigs.k8s.io/yaml v1.2.0/go.mod h1:yfXDCHCao9+ENCvLSE62v9VSji2MKu5jeNfTrofGhJc=
--- a/csi/src/config.go
+++ b/csi/src/config.go
@ -5,7 +5,7 @@ package vitastor
 const (
    vitastorCSIDriverName    = "csi.vitastor.io"
-    vitastorCSIDriverVersion = "0.6.10"
+    vitastorCSIDriverVersion = "0.6.4"
 )
 // Config struct fills the parameters of request or user input
--- a/csi/src/controllerserver.go
+++ b/csi/src/controllerserver.go
@ -354,9 +354,9 @@ func (cs *ControllerServer) DeleteVolume(ctx context.Context, req *csi.DeleteVol
        return nil, status.Error(codes.Internal, "invalid "+inodeCfgKey+" key in etcd: "+err.Error())
    }
-    // Delete inode data by invoking vitastor-cli
+    // Delete inode data by invoking vitastor-rm
    args := []string{
-        "rm-data", "--etcd_address", strings.Join(etcdUrl, ","),
+        "--etcd_address", strings.Join(etcdUrl, ","),
        "--pool", fmt.Sprintf("%d", idx.PoolId),
        "--inode", fmt.Sprintf("%d", idx.Id),
    }
@ -364,7 +364,7 @@ func (cs *ControllerServer) DeleteVolume(ctx context.Context, req *csi.DeleteVol
    {
        args = append(args, "--config_path", ctxVars["configPath"])
    }
-    c := exec.Command("/usr/bin/vitastor-cli", args...)
+    c := exec.Command("/usr/bin/vitastor-rm", args...)
    var stderr bytes.Buffer
    c.Stdout = nil
    c.Stderr = &stderr
@ -372,7 +372,7 @@ func (cs *ControllerServer) DeleteVolume(ctx context.Context, req *csi.DeleteVol
    stderrStr := string(stderr.Bytes())
    if (err != nil)
    {
-        klog.Errorf("vitastor-cli rm-data failed: %s, status %s\n", stderrStr, err)
+        klog.Errorf("vitastor-rm failed: %s, status %s\n", stderrStr, err)
        return nil, status.Error(codes.Internal, stderrStr+" (status "+err.Error()+")")
    }
--- a/debian/build-vitastor-bullseye.sh
+++ b/debian/build-vitastor-bullseye.sh
@ -1,7 +1,7 @@
 #!/bin/bash
-cat < vitastor.Dockerfile > ../Dockerfile
+sed 's/$REL/bullseye/g' < vitastor.Dockerfile > ../Dockerfile
 cd ..
 mkdir -p packages
-sudo podman build --build-arg REL=bullseye -v `pwd`/packages:/root/packages -f Dockerfile .
+sudo podman build -v `pwd`/packages:/root/packages -f Dockerfile .
 rm Dockerfile
--- a/debian/build-vitastor-buster.sh
+++ b/debian/build-vitastor-buster.sh
@ -1,7 +1,7 @@
 #!/bin/bash
-cat < vitastor.Dockerfile > ../Dockerfile
+sed 's/$REL/buster/g' < vitastor.Dockerfile > ../Dockerfile
 cd ..
 mkdir -p packages
-sudo podman build --build-arg REL=buster -v `pwd`/packages:/root/packages -f Dockerfile .
+sudo podman build -v `pwd`/packages:/root/packages -f Dockerfile .
 rm Dockerfile
--- a/debian/changelog
+++ b/debian/changelog
@ -1,4 +1,4 @@
-vitastor (0.6.10-1) unstable; urgency=medium
+vitastor (0.6.4-1) unstable; urgency=medium
  * RDMA support
  * Bugfixes
--- a/debian/control
+++ b/debian/control
@ -9,47 +9,9 @@ Rules-Requires-Root: no
 Package: vitastor
 Architecture: amd64
-Depends: vitastor-osd, vitastor-mon, vitastor-client, vitastor-client-dev, vitastor-fio
+Depends: ${shlibs:Depends}, ${misc:Depends}, fio (= ${dep:fio}), qemu (= ${dep:qemu}), nodejs (>= 10), node-sprintf-js, node-ws (>= 7), libjerasure2, lp-solve
 Description: Vitastor, a fast software-defined clustered block storage
 Vitastor is a small, simple and fast clustered block storage (storage for VM drives),
 architecturally similar to Ceph which means strong consistency, primary-replication,
 symmetric clustering and automatic data distribution over any number of drives of any
 size with configurable redundancy (replication or erasure codes/XOR).
 Package: vitastor-osd
 Architecture: amd64
 Depends: ${shlibs:Depends}, ${misc:Depends}, vitastor-client (= ${binary:Version})
 Description: Vitastor, a fast software-defined clustered block storage - object storage daemon
 Vitastor object storage daemon, i.e. server program that stores data.
 Package: vitastor-mon
 Architecture: amd64
 Depends: ${misc:Depends}, nodejs (>= 10), node-sprintf-js, node-ws (>= 7), lp-solve
 Description: Vitastor, a fast software-defined clustered block storage - monitor
 Vitastor monitor, i.e. server program responsible for watching cluster state and
 scheduling cluster-level operations.
 Package: vitastor-client
 Architecture: amd64
 Depends: ${shlibs:Depends}, ${misc:Depends}
 Description: Vitastor, a fast software-defined clustered block storage - client
 Vitastor client library and command-line interface.
 Package: vitastor-client-dev
 Section: devel
 Architecture: amd64
 Depends: ${misc:Depends}, vitastor-client (= ${binary:Version})
 Description: Vitastor, a fast software-defined clustered block storage - development files
 Vitastor library headers for development.
 Package: vitastor-fio
 Architecture: amd64
 Depends: ${shlibs:Depends}, ${misc:Depends}, vitastor-client (= ${binary:Version}), fio (= ${dep:fio})
 Description: Vitastor, a fast software-defined clustered block storage - fio drivers
 Vitastor fio drivers for benchmarking.
 Package: pve-storage-vitastor
 Architecture: amd64
 Depends: ${shlibs:Depends}, ${misc:Depends}, vitastor-client (= ${binary:Version})
 Description: Vitastor Proxmox Virtual Environment storage plugin
 Vitastor storage plugin for Proxmox Virtual Environment.
--- a/debian/fio_version
+++ b/debian/fio_version
@ -1 +0,0 @@
 dep:fio=3.16-1
--- a/debian/install
+++ b/debian/install
@ -1,4 +1,3 @@
 VNPL-1.1.txt usr/share/doc/vitastor
 GPL-2.0.txt usr/share/doc/vitastor
-README.md usr/share/doc/vitastor
+mon usr/lib/vitastor
 README-ru.md usr/share/doc/vitastor
--- a/debian/libvirt.Dockerfile
+++ b/debian/libvirt.Dockerfile
@ -1,40 +0,0 @@
 # Build patched libvirt for Debian Buster or Bullseye/Sid inside a container
 # cd ..; podman build --build-arg REL=bullseye -v `pwd`/packages:/root/packages -f debian/libvirt.Dockerfile .
 ARG REL=
 FROM debian:$REL
 ARG REL=
 WORKDIR /root
 RUN if [ "$REL" = "buster" -o "$REL" = "bullseye" ]; then \
        echo "deb http://deb.debian.org/debian $REL-backports main" >> /etc/apt/sources.list; \
        echo >> /etc/apt/preferences; \
        echo 'Package: *' >> /etc/apt/preferences; \
        echo "Pin: release a=$REL-backports" >> /etc/apt/preferences; \
        echo 'Pin-Priority: 500' >> /etc/apt/preferences; \
    fi; \
    grep '^deb ' /etc/apt/sources.list | perl -pe 's/^deb/deb-src/' >> /etc/apt/sources.list; \
    echo 'APT::Install-Recommends false;' >> /etc/apt/apt.conf; \
    echo 'APT::Install-Suggests false;' >> /etc/apt/apt.conf
 RUN apt-get update; apt-get -y install devscripts
 RUN apt-get -y build-dep libvirt0
 RUN apt-get -y install libglusterfs-dev
 RUN apt-get --download-only source libvirt
 ADD patches/libvirt-5.0-vitastor.diff patches/libvirt-7.0-vitastor.diff patches/libvirt-7.5-vitastor.diff patches/libvirt-7.6-vitastor.diff /root
 RUN set -e; \
    mkdir -p /root/packages/libvirt-$REL; \
    rm -rf /root/packages/libvirt-$REL/*; \
    cd /root/packages/libvirt-$REL; \
    dpkg-source -x /root/libvirt*.dsc; \
    D=$(ls -d libvirt-*/); \
    V=$(ls -d libvirt-*/ | perl -pe 's/libvirt-(\d+\.\d+).*/$1/'); \
    cp /root/libvirt-$V-vitastor.diff $D/debian/patches; \
    echo libvirt-$V-vitastor.diff >> $D/debian/patches/series; \
    cd $D; \
    V=$(head -n1 debian/changelog | perl -pe 's/^.*\((.*?)(~bpo[\d\+]*)?(\+deb[u\d]+)?\).*$/$1/')+vitastor2; \
    DEBEMAIL="Vitaliy Filippov <vitalif@yourcmc.ru>" dch -D $REL -v $V 'Add Vitastor support'; \
    DEB_BUILD_OPTIONS=nocheck dpkg-buildpackage --jobs=auto -sa; \
    rm -rf /root/packages/libvirt-$REL/$D
--- a/debian/patched-qemu.Dockerfile
+++ b/debian/patched-qemu.Dockerfile
@ -1,17 +1,15 @@
 # Build patched QEMU for Debian Buster or Bullseye/Sid inside a container
 # cd ..; podman build --build-arg REL=bullseye -v `pwd`/packages:/root/packages -f debian/patched-qemu.Dockerfile .
 ARG REL=
 FROM debian:$REL
 ARG REL=
 WORKDIR /root
-RUN if [ "$REL" = "buster" -o "$REL" = "bullseye" ]; then \
+RUN if [ "$REL" = "buster" ]; then \
-        echo "deb http://deb.debian.org/debian $REL-backports main" >> /etc/apt/sources.list; \
+        echo 'deb http://deb.debian.org/debian buster-backports main' >> /etc/apt/sources.list; \
        echo >> /etc/apt/preferences; \
        echo 'Package: *' >> /etc/apt/preferences; \
-        echo "Pin: release a=$REL-backports" >> /etc/apt/preferences; \
+        echo 'Pin: release a=buster-backports' >> /etc/apt/preferences; \
        echo 'Pin-Priority: 500' >> /etc/apt/preferences; \
    fi; \
    grep '^deb ' /etc/apt/sources.list | perl -pe 's/^deb/deb-src/' >> /etc/apt/sources.list; \
@ -21,41 +19,26 @@ RUN if [ "$REL" = "buster" -o "$REL" = "bullseye" ]; then \
 RUN apt-get update
 RUN apt-get -y install qemu fio liburing1 liburing-dev libgoogle-perftools-dev devscripts
 RUN apt-get -y build-dep qemu
-# To build a custom version
+RUN apt-get -y build-dep fio
 #RUN cp /root/packages/qemu-orig/* /root
 RUN apt-get --download-only source qemu
 RUN apt-get --download-only source fio
-ADD patches/qemu-5.0-vitastor.patch patches/qemu-5.1-vitastor.patch patches/qemu-6.1-vitastor.patch src/qemu_driver.c /root/vitastor/patches/
+ADD qemu-5.0-vitastor.patch qemu-5.1-vitastor.patch /root/vitastor/
 RUN set -e; \
    apt-get install -y wget; \
    wget -q -O /etc/apt/trusted.gpg.d/vitastor.gpg https://vitastor.io/debian/pubkey.gpg; \
    (echo deb http://vitastor.io/debian $REL main > /etc/apt/sources.list.d/vitastor.list); \
    (echo "APT::Install-Recommends false;" > /etc/apt/apt.conf) && \
    apt-get update; \
    apt-get install -y vitastor-client vitastor-client-dev quilt; \
    mkdir -p /root/packages/qemu-$REL; \
    rm -rf /root/packages/qemu-$REL/*; \
    cd /root/packages/qemu-$REL; \
    dpkg-source -x /root/qemu*.dsc; \
-    if ls -d /root/packages/qemu-$REL/qemu-5.0*; then \
+    if [ -d /root/packages/qemu-$REL/qemu-5.0 ]; then \
-        D=$(ls -d /root/packages/qemu-$REL/qemu-5.0*); \
+        cp /root/vitastor/qemu-5.0-vitastor.patch /root/packages/qemu-$REL/qemu-5.0/debian/patches; \
-        cp /root/vitastor/patches/qemu-5.0-vitastor.patch $D/debian/patches; \
+        echo qemu-5.0-vitastor.patch >> /root/packages/qemu-$REL/qemu-5.0/debian/patches/series; \
        echo qemu-5.0-vitastor.patch >> $D/debian/patches/series; \
    elif ls /root/packages/qemu-$REL/qemu-6.1*; then \
        D=$(ls -d /root/packages/qemu-$REL/qemu-6.1*); \
        cp /root/vitastor/patches/qemu-6.1-vitastor.patch $D/debian/patches; \
        echo qemu-6.1-vitastor.patch >> $D/debian/patches/series; \
    else \
-        cp /root/vitastor/patches/qemu-5.1-vitastor.patch /root/packages/qemu-$REL/qemu-*/debian/patches; \
+        cp /root/vitastor/qemu-5.1-vitastor.patch /root/packages/qemu-$REL/qemu-*/debian/patches; \
        P=`ls -d /root/packages/qemu-$REL/qemu-*/debian/patches`; \
        echo qemu-5.1-vitastor.patch >> $P/series; \
    fi; \
    cd /root/packages/qemu-$REL/qemu-*/; \
    quilt push -a; \
    quilt add block/vitastor.c; \
    cp /root/vitastor/patches/qemu_driver.c block/vitastor.c; \
    quilt refresh; \
    V=$(head -n1 debian/changelog | perl -pe 's/^.*\((.*?)(~bpo[\d\+]*)?\).*$/$1/')+vitastor1; \
-    DEBEMAIL="Vitaliy Filippov <vitalif@yourcmc.ru>" dch -D $REL -v $V 'Plug Vitastor block driver'; \
+    DEBFULLNAME="Vitaliy Filippov <vitalif@yourcmc.ru>" dch -D $REL -v $V 'Plug Vitastor block driver'; \
    DEB_BUILD_OPTIONS=nocheck dpkg-buildpackage --jobs=auto -sa; \
    rm -rf /root/packages/qemu-$REL/qemu-*/
--- a/debian/pve-storage-vitastor.install
+++ b/debian/pve-storage-vitastor.install
@ -1 +0,0 @@
 patches/PVE_VitastorPlugin.pm usr/share/perl5/PVE/Storage/Custom/VitastorPlugin.pm
--- a/debian/raw.h
+++ b/debian/raw.h
@ -1,19 +0,0 @@
 /* Removed in Linux 5.14 */
 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
 #ifndef __LINUX_RAW_H
 #define __LINUX_RAW_H
 #include <linux/types.h>
 #define RAW_SETBIND	_IO( 0xac, 0 )
 #define RAW_GETBIND	_IO( 0xac, 1 )
 struct raw_config_request 
 {
 	int	raw_minor;
 	__u64	block_major;
 	__u64	block_minor;
 };
 #endif /* __LINUX_RAW_H */
--- a/debian/rules
+++ b/debian/rules
@ -5,6 +5,5 @@ export DH_VERBOSE = 1
 	dh $@
 override_dh_installdeb:
-	cat debian/fio_version >> debian/vitastor-fio.substvars
+	cat debian/substvars >> debian/vitastor.substvars
 	[ -f debian/qemu_version ] && (cat debian/qemu_version >> debian/vitastor-qemu.substvars) || true
 	dh_installdeb
--- a/debian/substvars
+++ b/debian/substvars
@ -0,0 +1,2 @@
 dep:fio=3.16-1
 dep:qemu=1:5.1+dfsg-4+vitastor1
--- a/debian/vitastor-client-dev.install
+++ b/debian/vitastor-client-dev.install
@ -1,2 +0,0 @@
 usr/include
 usr/lib/*/pkgconfig
--- a/debian/vitastor-client.install
+++ b/debian/vitastor-client.install
@ -1,6 +0,0 @@
 usr/bin/vita
 usr/bin/vitastor-cli
 usr/bin/vitastor-rm
 usr/bin/vitastor-nbd
 usr/lib/*/libvitastor*.so*
 mon/make-osd.sh /usr/lib/vitastor
--- a/debian/vitastor-fio.install
+++ b/debian/vitastor-fio.install
@ -1 +0,0 @@
 usr/lib/*/libfio*.so*
--- a/debian/vitastor-mon.install
+++ b/debian/vitastor-mon.install
@ -1 +0,0 @@
 mon usr/lib/vitastor
--- a/debian/vitastor-osd.install
+++ b/debian/vitastor-osd.install
@ -1,2 +0,0 @@
 usr/bin/vitastor-osd
 usr/bin/vitastor-dump-journal
--- a/debian/vitastor.Dockerfile
+++ b/debian/vitastor.Dockerfile
@ -1,17 +1,15 @@
 # Build Vitastor packages for Debian Buster or Bullseye/Sid inside a container
 # cd ..; podman build --build-arg REL=bullseye -v `pwd`/packages:/root/packages -f debian/vitastor.Dockerfile .
 ARG REL=
 FROM debian:$REL
 ARG REL=
 WORKDIR /root
-RUN if [ "$REL" = "buster" -o "$REL" = "bullseye" ]; then \
+RUN if [ "$REL" = "buster" ]; then \
-        echo "deb http://deb.debian.org/debian $REL-backports main" >> /etc/apt/sources.list; \
+        echo 'deb http://deb.debian.org/debian buster-backports main' >> /etc/apt/sources.list; \
        echo >> /etc/apt/preferences; \
        echo 'Package: *' >> /etc/apt/preferences; \
-        echo "Pin: release a=$REL-backports" >> /etc/apt/preferences; \
+        echo 'Pin: release a=buster-backports' >> /etc/apt/preferences; \
        echo 'Pin-Priority: 500' >> /etc/apt/preferences; \
    fi; \
    grep '^deb ' /etc/apt/sources.list | perl -pe 's/^deb/deb-src/' >> /etc/apt/sources.list; \
@ -19,8 +17,10 @@ RUN if [ "$REL" = "buster" -o "$REL" = "bullseye" ]; then \
    echo 'APT::Install-Suggests false;' >> /etc/apt/apt.conf
 RUN apt-get update
-RUN apt-get -y install fio liburing1 liburing-dev libgoogle-perftools-dev devscripts
+RUN apt-get -y install qemu fio liburing1 liburing-dev libgoogle-perftools-dev devscripts
 RUN apt-get -y build-dep qemu
 RUN apt-get -y build-dep fio
 RUN apt-get --download-only source qemu
 RUN apt-get --download-only source fio
 RUN apt-get update && apt-get -y install libjerasure-dev cmake libibverbs-dev
@ -30,25 +30,37 @@ RUN set -e -x; \
    cd /root/fio-build/; \
    rm -rf /root/fio-build/*; \
    dpkg-source -x /root/fio*.dsc; \
    cd /root/packages/qemu-$REL/; \
    rm -rf qemu*/; \
    dpkg-source -x qemu*.dsc; \
    cd /root/packages/qemu-$REL/qemu*/; \
    debian/rules b/configure-stamp; \
    cd b/qemu; \
    make -j8 qapi/qapi-builtin-types.h; \
    mkdir -p /root/packages/vitastor-$REL; \
    rm -rf /root/packages/vitastor-$REL/*; \
    cd /root/packages/vitastor-$REL; \
-    cp -r /root/vitastor vitastor-0.6.10; \
+    cp -r /root/vitastor vitastor-0.6.4; \
-    cd vitastor-0.6.10; \
+    ln -s /root/packages/qemu-$REL/qemu-*/ vitastor-0.6.4/qemu; \
-    ln -s /root/fio-build/fio-*/ ./fio; \
+    ln -s /root/fio-build/fio-*/ vitastor-0.6.4/fio; \
    cd vitastor-0.6.4; \
    FIO=$(head -n1 fio/debian/changelog | perl -pe 's/^.*\((.*?)\).*$/$1/'); \
-    ls /usr/include/linux/raw.h || cp ./debian/raw.h /usr/include/linux/raw.h; \
+    QEMU=$(head -n1 qemu/debian/changelog | perl -pe 's/^.*\((.*?)\).*$/$1/'); \
    sh copy-qemu-includes.sh; \
    sh copy-fio-includes.sh; \
-    rm fio; \
+    rm qemu fio; \
    mkdir -p a b debian/patches; \
    mv qemu-copy b/qemu; \
    mv fio-copy b/fio; \
-    diff -NaurpbB a b > debian/patches/fio-headers.patch || true; \
+    diff -NaurpbB a b > debian/patches/qemu-fio-headers.patch || true; \
-    echo fio-headers.patch >> debian/patches/series; \
+    echo qemu-fio-headers.patch >> debian/patches/series; \
    rm -rf a b; \
-    echo "dep:fio=$FIO" > debian/fio_version; \
+    rm -rf /root/packages/qemu-$REL/qemu*/; \
    echo "dep:fio=$FIO" > debian/substvars; \
    echo "dep:qemu=$QEMU" >> debian/substvars; \
    cd /root/packages/vitastor-$REL; \
-    tar --sort=name --mtime='2020-01-01' --owner=0 --group=0 --exclude=debian -cJf vitastor_0.6.10.orig.tar.xz vitastor-0.6.10; \
+    tar --sort=name --mtime='2020-01-01' --owner=0 --group=0 --exclude=debian -cJf vitastor_0.6.4.orig.tar.xz vitastor-0.6.4; \
-    cd vitastor-0.6.10; \
+    cd vitastor-0.6.4; \
    V=$(head -n1 debian/changelog | perl -pe 's/^.*\((.*?)\).*$/$1/'); \
    DEBFULLNAME="Vitaliy Filippov <vitalif@yourcmc.ru>" dch -D $REL -v "$V""$REL" "Rebuild for $REL"; \
    DEB_BUILD_OPTIONS=nocheck dpkg-buildpackage --jobs=auto -sa; \
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@ -1,9 +0,0 @@
 # Build Docker image with Vitastor packages
 FROM debian:bullseye
 ADD vitastor.list /etc/apt/sources.list.d
 ADD vitastor.gpg /etc/apt/trusted.gpg.d
 ADD vitastor.pref /etc/apt/preferences.d
 ADD apt.conf /etc/apt/
 RUN apt-get update && apt-get -y install vitastor qemu-system-x86 qemu-system-common && apt-get clean
--- a/docker/apt.conf
+++ b/docker/apt.conf
@ -1 +0,0 @@
 APT::Install-Recommends false;
--- a/docker/vitastor.gpg
+++ b/docker/vitastor.gpg
--- a/docker/vitastor.list
+++ b/docker/vitastor.list
@ -1 +0,0 @@
 deb http://vitastor.io/debian bullseye main
--- a/docker/vitastor.pref
+++ b/docker/vitastor.pref
@ -1,3 +0,0 @@
 Package: *
 Pin: origin "vitastor.io"
 Pin-Priority: 1000
--- a/2
+++ b/2
@ -1 +1 @@
-Subproject commit 55363fc2653b8802637a3d2e73a06839a72c585d
+Subproject commit 97f06cb20c1e136fd37d58fb40f57dd8f8a3a4a7
--- a/mon/lp-optimizer.js
+++ b/mon/lp-optimizer.js
@ -50,7 +50,7 @@ async function lp_solve(text)
    return { score, vars };
 }
-async function optimize_initial({ osd_tree, pg_count, pg_size = 3, pg_minsize = 2, max_combinations = 10000, parity_space = 1, round_robin = false })
+async function optimize_initial({ osd_tree, pg_count, pg_size = 3, pg_minsize = 2, max_combinations = 10000, parity_space = 1 })
 {
    if (!pg_count || !osd_tree)
    {
@ -92,7 +92,7 @@ async function optimize_initial({ osd_tree, pg_count, pg_size = 3, pg_minsize =
        console.log(lp);
        throw new Error('Problem is infeasible or unbounded - is it a bug?');
    }
-    const int_pgs = make_int_pgs(lp_result.vars, pg_count, round_robin);
+    const int_pgs = make_int_pgs(lp_result.vars, pg_count);
    const eff = pg_list_space_efficiency(int_pgs, all_weights, pg_minsize, parity_space);
    const res = {
        score: lp_result.score,
@ -115,7 +115,7 @@ function shuffle(array)
    }
 }
-function make_int_pgs(weights, pg_count, round_robin)
+function make_int_pgs(weights, pg_count)
 {
    const total_weight = Object.values(weights).reduce((a, c) => Number(a) + Number(c), 0);
    let int_pgs = [];
@ -123,15 +123,10 @@ function make_int_pgs(weights, pg_count, round_robin)
    let weight_left = total_weight;
    for (const pg_name in weights)
    {
        let cur_pg = pg_name.substr(3).split('_');
        let n = Math.round(weights[pg_name] / weight_left * pg_left);
        for (let i = 0; i < n; i++)
        {
-            int_pgs.push([ ...cur_pg ]);
+            int_pgs.push(pg_name.substr(3).split('_'));
            if (round_robin)
            {
                cur_pg.push(cur_pg.shift());
            }
        }
        weight_left -= weights[pg_name];
        pg_left -= n;
@ -293,6 +288,11 @@ async function optimize_change({ prev_pgs: prev_int_pgs, osd_tree, pg_size = 3,
    lp += 'max: '+all_pg_names.map(pg_name => (
        prev_weights[pg_name] ? `${pg_size+1}*add_${pg_name} - ${pg_size+1}*del_${pg_name}` : `${pg_size+1-move_weights[pg_name]}*${pg_name}`
    )).join(' + ')+';\n';
    lp += all_pg_names
        .map(pg_name => (prev_weights[pg_name] ? `add_${pg_name} - del_${pg_name}` : `${pg_name}`))
        .join(' + ')+' = '+(pg_count
            - Object.keys(prev_weights).reduce((a, old_pg_name) => (a + (all_pgs_hash[old_pg_name] ? prev_weights[old_pg_name] : 0)), 0)
        )+';\n';
    for (const osd in pg_per_osd)
    {
        if (osd !== NO_OSD)
--- a/mon/make-osd.sh
+++ b/mon/make-osd.sh
@ -4,25 +4,36 @@
 # Copyright (c) Vitaliy Filippov, 2019+
 # License: MIT
-# USAGE:
+# USAGE: ./make-osd.sh /dev/disk/by-partuuid/xxx [ /dev/disk/by-partuuid/yyy]...
-# 1) Put etcd_address and osd_network into /etc/vitastor/vitastor.conf. Example:
+
-#    {
+IP_SUBSTR="10.200.1."
-#        "etcd_address":["http://10.200.1.10:2379/v3","http://10.200.1.11:2379/v3","http://10.200.1.12:2379/v3"],
+ETCD_HOSTS="etcd0=http://10.200.1.10:2380,etcd1=http://10.200.1.11:2380,etcd2=http://10.200.1.12:2380"
 #        "osd_network":"10.200.1.0/24"
 #    }
 # 2) Run ./make-osd.sh /dev/disk/by-partuuid/xxx [ /dev/disk/by-partuuid/yyy]...
 set -e -x
 IP=`ip -json a s | jq -r '.[].addr_info[] | select(.local | startswith("'$IP_SUBSTR'")) | .local'`
 [ "$IP" != "" ] || exit 1
 ETCD_MON=$(echo $ETCD_HOSTS | perl -pe 's/:2380/:2379/g; s/etcd\d*=//g;')
 D=`dirname $0`
 # Create OSDs on all passed devices
 OSD_NUM=1
 for DEV in $*; do
-OSD_NUM=$(vitastor-cli alloc-osd)
+# Ugly :) -> node.js rework pending
 while true; do
    ST=$(etcdctl --endpoints="$ETCD_MON" get --print-value-only /vitastor/osd/stats/$OSD_NUM)
    if [ "$ST" = "" ]; then
        break
    fi
    OSD_NUM=$((OSD_NUM+1))
 done
 etcdctl --endpoints="$ETCD_MON" put /vitastor/osd/stats/$OSD_NUM '{}'
 echo Creating OSD $OSD_NUM on $DEV
-OPT=$(vitastor-cli simple-offsets --format options $DEV | tr '\n' ' ')
+OPT=`node $D/simple-offsets.js --device $DEV --format options | tr '\n' ' '`
-META=$(vitastor-cli simple-offsets --format json $DEV | jq .data_offset)
+META=`echo $OPT | grep -Po '(?<=data_offset )\d+'`
 dd if=/dev/zero of=$DEV bs=1048576 count=$(((META+1048575)/1048576)) oflag=direct
 cat >/etc/systemd/system/vitastor-osd$OSD_NUM.service <<EOF
@ -37,6 +48,8 @@ LimitNOFILE=1048576
 LimitNPROC=1048576
 LimitMEMLOCK=infinity
 ExecStart=/usr/bin/vitastor-osd \\
    --etcd_address $IP:2379/v3 \\
    --bind_address $IP \\
    --osd_num $OSD_NUM \\
    --disable_data_fsync 1 \\
    --immediate_commit all \\
--- a/mon/mon-main.js
+++ b/mon/mon-main.js
@ -9,18 +9,17 @@ const options = {};
 for (let i = 2; i < process.argv.length; i++)
 {
-    if (process.argv[i] === '-h' || process.argv[i] === '--help')
+    if (process.argv[i].substr(0, 2) == '--')
    {
        console.error('USAGE: '+process.argv[0]+' '+process.argv[1]+' [--verbose 1]'+
            ' [--etcd_address "http://127.0.0.1:2379,..."] [--config_file /etc/vitastor/vitastor.conf]'+
            ' [--etcd_prefix "/vitastor"] [--etcd_start_timeout 5]');
        process.exit();
    }
    else if (process.argv[i].substr(0, 2) == '--')
    {
        options[process.argv[i].substr(2)] = process.argv[i+1];
        i++;
    }
 }
-new Mon(options).start().catch(e => { console.error(e); process.exit(1); });
+if (!options.etcd_url)
 {
    console.error('USAGE: '+process.argv[0]+' '+process.argv[1]+' --etcd_url "http://127.0.0.1:2379,..." --etcd_prefix "/vitastor" --etcd_start_timeout 5 [--verbose 1]');
    process.exit();
 }
 new Mon(options).start().catch(e => { console.error(e); process.exit(); });
--- a/mon/mon.js
+++ b/mon/mon.js
@ -1,7 +1,6 @@
 // Copyright (c) Vitaliy Filippov, 2019+
 // License: VNPL-1.1 (see README.md for details)
 const fs = require('fs');
 const http = require('http');
 const crypto = require('crypto');
 const os = require('os');
@ -34,10 +33,8 @@ const etcd_allow = new RegExp('^'+[
    'pg/state/[1-9]\\d*/[1-9]\\d*',
    'pg/stats/[1-9]\\d*/[1-9]\\d*',
    'pg/history/[1-9]\\d*/[1-9]\\d*',
    'pool/stats/[1-9]\\d*',
    'history/last_clean_pgs',
    'inode/stats/[1-9]\\d*/[1-9]\\d*',
    'pool/stats/[1-9]\\d*',
    'stats',
    'index/image/.*',
    'index/maxid/[1-9]\\d*',
@ -84,13 +81,11 @@ const etcd_tree = {
            osd_ping_timeout: 5, // seconds. min: 1
            up_wait_retry_interval: 500, // ms. min: 50
            // osd
-            etcd_report_interval: 5,
+            etcd_report_interval: 30, // min: 10
            run_primary: true,
            osd_network: null, // "192.168.7.0/24" or an array of masks
            bind_address: "0.0.0.0",
            bind_port: 0,
            autosync_interval: 5,
            autosync_writes: 128,
            client_queue_depth: 128, // unused
            recovery_queue_depth: 4,
            recovery_sync_batch: 16,
@ -234,7 +229,7 @@ const etcd_tree = {
            /* <pool_id>: {
                <pg_id>: {
                    primary: osd_num_t,
-                    state: ("starting"|"peering"|"peered"|"incomplete"|"active"|"repeering"|"stopping"|"offline"|
+                    state: ("starting"|"peering"|"incomplete"|"active"|"repeering"|"stopping"|"offline"|
                        "degraded"|"has_incomplete"|"has_degraded"|"has_misplaced"|"has_unclean"|
                        "has_invalid"|"left_on_dead")[],
                }
@ -267,9 +262,9 @@ const etcd_tree = {
            /* <pool_id>: {
                <inode_t>: {
                    raw_used: uint64_t, // raw used bytes on OSDs
-                    read: { count: uint64_t, usec: uint64_t, bytes: uint64_t, bps: uint64_t, iops: uint64_t, lat: uint64_t },
+                    read: { count: uint64_t, usec: uint64_t, bytes: uint64_t },
-                    write: { count: uint64_t, usec: uint64_t, bytes: uint64_t, bps: uint64_t, iops: uint64_t, lat: uint64_t },
+                    write: { count: uint64_t, usec: uint64_t, bytes: uint64_t },
-                    delete: { count: uint64_t, usec: uint64_t, bytes: uint64_t, bps: uint64_t, iops: uint64_t, lat: uint64_t },
+                    delete: { count: uint64_t, usec: uint64_t, bytes: uint64_t },
                },
            }, */
        },
@ -286,14 +281,14 @@ const etcd_tree = {
    },
    stats: {
        /* op_stats: {
-            <string>: { count: uint64_t, usec: uint64_t, bytes: uint64_t, bps: uint64_t, iops: uint64_t, lat: uint64_t },
+            <string>: { count: uint64_t, usec: uint64_t, bytes: uint64_t },
        },
        subop_stats: {
-            <string>: { count: uint64_t, usec: uint64_t, iops: uint64_t, lat: uint64_t },
+            <string>: { count: uint64_t, usec: uint64_t },
        },
        recovery_stats: {
-            degraded: { count: uint64_t, bytes: uint64_t, bps: uint64_t, iops: uint64_t },
+            degraded: { count: uint64_t, bytes: uint64_t },
-            misplaced: { count: uint64_t, bytes: uint64_t, bps: uint64_t, iops: uint64_t },
+            misplaced: { count: uint64_t, bytes: uint64_t },
        },
        object_counts: {
            object: uint64_t,
@ -324,53 +319,22 @@ class Mon
 {
    constructor(config)
    {
-        this.die = (e) => this._die(e);
+        // FIXME: Maybe prefer local etcd
-        if (fs.existsSync(config.config_path||'/etc/vitastor/vitastor.conf'))
+        this.etcd_urls = [];
        for (let url of config.etcd_url.split(/,/))
        {
-            config = {
+            let scheme = 'http';
-                ...JSON.parse(fs.readFileSync(config.config_path||'/etc/vitastor/vitastor.conf', { encoding: 'utf-8' })),
+            url = url.trim().replace(/^(https?):\/\//, (m, m1) => { scheme = m1; return ''; });
-                ...config,
+            if (!/\/[^\/]/.exec(url))
-            };
+                url += '/v3';
            this.etcd_urls.push(scheme+'://'+url);
        }
        this.parse_etcd_addresses(config.etcd_address||config.etcd_url);
        this.verbose = config.verbose || 0;
        this.initConfig = config;
        this.config = {};
        this.etcd_prefix = config.etcd_prefix || '/vitastor';
        this.etcd_prefix = this.etcd_prefix.replace(/\/\/+/g, '/').replace(/^\/?(.*[^\/])\/?$/, '/$1');
        this.etcd_start_timeout = (config.etcd_start_timeout || 5) * 1000;
        this.state = JSON.parse(JSON.stringify(this.constructor.etcd_tree));
        this.signals_set = false;
        this.on_stop_cb = () => this.on_stop(0).catch(console.error);
    }
    parse_etcd_addresses(addrs)
    {
        const is_local_ip = this.local_ips(true).reduce((a, c) => { a[c] = true; return a; }, {});
        this.etcd_local = [];
        this.etcd_urls = [];
        this.selected_etcd_url = null;
        this.etcd_urls_to_try = [];
        if (!(addrs instanceof Array))
            addrs = addrs ? (''+(addrs||'')).split(/,/) : [];
        if (!addrs.length)
        {
            console.error('Vitastor etcd address(es) not specified. Please set on the command line or in the config file');
            process.exit(1);
        }
        for (let url of addrs)
        {
            let scheme = 'http';
            url = url.trim().replace(/^(https?):\/\//, (m, m1) => { scheme = m1; return ''; });
            const slash = url.indexOf('/');
            const colon = url.indexOf(':');
            const is_local = is_local_ip[colon >= 0 ? url.substr(0, colon) : (slash >= 0 ? url.substr(0, slash) : url)];
            url = scheme+'://'+(slash >= 0 ? url : url+'/v3');
            if (is_local)
                this.etcd_local.push(url);
            else
                this.etcd_urls.push(url);
        }
    }
    async start()
@ -380,18 +344,7 @@ class Mon
        await this.become_master();
        await this.load_cluster_state();
        await this.start_watcher(this.config.etcd_mon_retries);
        for (const pool_id in this.state.config.pools)
        {
            if (!this.state.pool.stats[pool_id] ||
                !this.state.pool.stats[pool_id].pg_real_size)
            {
                // Generate missing data in etcd
                this.state.config.pgs.hash = null;
                break;
            }
        }
        await this.recheck_pgs();
        this.schedule_update_stats();
    }
    async load_config()
@ -433,6 +386,11 @@ class Mon
        {
            this.config.mon_stats_timeout = 100;
        }
        this.config.mon_stats_interval = Number(this.config.mon_stats_interval) || 5000;
        if (this.config.mon_stats_interval < 100)
        {
            this.config.mon_stats_interval = 100;
        }
        // After this number of seconds, a dead OSD will be removed from PG distribution
        this.config.osd_out_time = Number(this.config.osd_out_time) || 0;
        if (!this.config.osd_out_time)
@ -441,31 +399,6 @@ class Mon
        }
    }
    pick_next_etcd()
    {
        if (this.selected_etcd_url)
            return this.selected_etcd_url;
        if (!this.etcd_urls_to_try || !this.etcd_urls_to_try.length)
        {
            this.etcd_urls_to_try = [ ...this.etcd_local ];
            const others = [ ...this.etcd_urls ];
            while (others.length)
            {
                const url = others.splice(0|(others.length*Math.random()), 1);
                this.etcd_urls_to_try.push(url[0]);
            }
        }
        this.selected_etcd_url = this.etcd_urls_to_try.shift();
        return this.selected_etcd_url;
    }
    restart_watcher(cur_addr)
    {
        if (this.selected_etcd_url == cur_addr)
            this.selected_etcd_url = null;
        this.start_watcher(this.config.etcd_mon_retries).catch(this.die);
    }
    async start_watcher(retries)
    {
        let retry = 0;
@ -475,8 +408,7 @@ class Mon
        }
        while (retries < 0 || retry < retries)
        {
-            const cur_addr = this.pick_next_etcd();
+            const base = 'ws'+this.etcd_urls[Math.floor(Math.random()*this.etcd_urls.length)].substr(4);
            const base = 'ws'+cur_addr.substr(4);
            const ok = await new Promise((ok, no) =>
            {
                const timer_id = setTimeout(() =>
@ -499,9 +431,9 @@ class Mon
                });
            });
            if (ok)
            {
                break;
-            if (this.selected_etcd_url == cur_addr)
+            }
                this.selected_etcd_url = null;
            this.ws = null;
            retry++;
        }
@ -509,8 +441,6 @@ class Mon
        {
            this.die('Failed to open etcd watch websocket');
        }
        const cur_addr = this.selected_etcd_url;
        this.ws.on('error', () => this.restart_watcher(cur_addr));
        this.ws.send(JSON.stringify({
            create_request: {
                key: b64(this.etcd_prefix+'/'),
@ -530,25 +460,12 @@ class Mon
            catch (e)
            {
            }
-            if (!data || !data.result)
+            if (!data || !data.result || !data.result.events)
            {
-                console.error('Unknown message received from watch websocket: '+msg);
+                if (!data || !data.result || !data.result.watch_id)
                {
                    console.error('Garbage received from watch websocket: '+msg);
                }
            else if (data.result.canceled)
            {
                // etcd watch canceled
                if (data.result.compact_revision)
                {
                    // we may miss events if we proceed
                    console.error('Revisions before '+data.result.compact_revision+' were compacted by etcd, exiting');
                    this.on_stop(1);
                }
                console.error('Watch canceled by etcd, reason: '+data.result.cancel_reason+', exiting');
                this.on_stop(1);
            }
            else if (data.result.created)
            {
                // etcd watch created
            }
            else
            {
@ -581,7 +498,7 @@ class Mon
                }
                if (pg_states_changed)
                {
-                    this.save_last_clean().catch(this.die);
+                    this.save_last_clean().catch(console.error);
                }
                if (stats_changed)
                {
@ -636,7 +553,7 @@ class Mon
        const max_ttl = this.config.etcd_mon_ttl + this.config.etcd_mon_timeout/1000*this.config.etcd_mon_retries;
        const res = await this.etcd_call('/lease/grant', { TTL: max_ttl }, this.config.etcd_mon_timeout, -1);
        this.etcd_lease_id = res.ID;
-        this.lease_timer = setInterval(async () =>
+        setInterval(async () =>
        {
            const res = await this.etcd_call('/lease/keepalive', { ID: this.etcd_lease_id }, this.config.etcd_mon_timeout, this.config.etcd_mon_retries);
            if (!res.result.TTL)
@ -644,19 +561,6 @@ class Mon
                this.die('Lease expired');
            }
        }, this.config.etcd_mon_timeout);
        if (!this.signals_set)
        {
            process.on('SIGINT', this.on_stop_cb);
            process.on('SIGTERM', this.on_stop_cb);
            this.signals_set = true;
        }
    }
    async on_stop(status)
    {
        clearInterval(this.lease_timer);
        await this.etcd_call('/lease/revoke', { ID: this.etcd_lease_id }, this.config.etcd_mon_timeout, this.config.etcd_mon_retries);
        process.exit(status);
    }
    async become_master()
@ -709,13 +613,10 @@ class Mon
        for (const node_id in this.state.config.node_placement||{})
        {
            const node_cfg = this.state.config.node_placement[node_id];
-            if (/^\d+$/.exec(node_id))
+            if (!node_id || /^\d/.exec(node_id) ||
                !node_cfg.level || !levels[node_cfg.level])
            {
-                node_cfg.level = 'osd';
+                // All nodes must have non-empty non-numeric IDs and valid levels
            }
            if (!node_id || !node_cfg.level || !levels[node_cfg.level])
            {
                // All nodes must have non-empty IDs and valid levels
                continue;
            }
            tree[node_id] = { id: node_id, level: node_cfg.level, parent: node_cfg.parent, children: [] };
@ -748,10 +649,10 @@ class Mon
                        .reduce((a, c) => { a[c] = true; return a; }, {});
                }
                delete tree[osd_num].children;
-                if (!tree[stat.host])
+                if (!tree[tree[osd_num].parent])
                {
-                    tree[stat.host] = {
+                    tree[tree[osd_num].parent] = {
-                        id: stat.host,
+                        id: tree[osd_num].parent,
                        level: 'host',
                        parent: null,
                        children: [],
@ -1097,7 +998,6 @@ class Mon
                    pg_size: pool_cfg.pg_size,
                    pg_minsize: pool_cfg.pg_minsize,
                    max_combinations: pool_cfg.max_osd_combinations,
                    round_robin: pool_cfg.scheme != 'replicated',
                };
                let optimize_result;
                if (old_pg_count > 0)
@ -1159,9 +1059,7 @@ class Mon
                this.state.pool.stats[pool_id] = {
                    used_raw_tb: (this.state.pool.stats[pool_id]||{}).used_raw_tb || 0,
                    total_raw_tb: optimize_result.space,
-                    pg_real_size: pg_effsize,
+                    raw_to_usable: pg_effsize / (pool_cfg.pg_size - (pool_cfg.parity_chunks||0)),
                    raw_to_usable: pg_effsize / (pool_cfg.scheme === 'replicated'
                        ? 1 : (pool_cfg.pg_size - (pool_cfg.parity_chunks||0))),
                    space_efficiency: optimize_result.space/(optimize_result.total_space||1),
                };
                etcd_request.success.push({ requestPut: {
@ -1270,11 +1168,11 @@ class Mon
        this.recheck_timer = setTimeout(() =>
        {
            this.recheck_timer = null;
-            this.recheck_pgs().catch(this.die);
+            this.recheck_pgs().catch(console.error);
        }, this.config.mon_change_timeout || 1000);
    }
-    sum_op_stats(timestamp, prev_stats)
+    sum_op_stats()
    {
        const op_stats = {}, subop_stats = {}, recovery_stats = {};
        for (const osd in this.state.osd.stats)
@ -1300,29 +1198,6 @@ class Mon
                recovery_stats[op].bytes += BigInt(st.recovery_stats[op].bytes||0);
            }
        }
        if (prev_stats && prev_stats.timestamp >= timestamp)
        {
            prev_stats = null;
        }
        const tm = prev_stats ? BigInt(timestamp - prev_stats.timestamp) : 0;
        for (const op in op_stats)
        {
            op_stats[op].bps = prev_stats ? (op_stats[op].bytes - prev_stats.op_stats[op].bytes) * 1000n / tm : 0;
            op_stats[op].iops = prev_stats ? (op_stats[op].count - prev_stats.op_stats[op].count) * 1000n / tm : 0;
            op_stats[op].lat = prev_stats ? (op_stats[op].usec - prev_stats.op_stats[op].usec)
                / ((op_stats[op].count - prev_stats.op_stats[op].count) || 1n) : 0;
        }
        for (const op in subop_stats)
        {
            subop_stats[op].iops = prev_stats ? (subop_stats[op].count - prev_stats.subop_stats[op].count) * 1000n / tm : 0;
            subop_stats[op].lat = prev_stats ? (subop_stats[op].usec - prev_stats.subop_stats[op].usec)
                / ((subop_stats[op].count - prev_stats.subop_stats[op].count) || 1n) : 0;
        }
        for (const op in recovery_stats)
        {
            recovery_stats[op].bps = prev_stats ? (recovery_stats[op].bytes - prev_stats.recovery_stats[op].bytes) * 1000n / tm : 0;
            recovery_stats[op].iops = prev_stats ? (recovery_stats[op].count - prev_stats.recovery_stats[op].count) * 1000n / tm : 0;
        }
        return { op_stats, subop_stats, recovery_stats };
    }
@ -1349,7 +1224,7 @@ class Mon
        return object_counts;
    }
-    sum_inode_stats(prev_stats, timestamp, prev_timestamp)
+    sum_inode_stats()
    {
        const inode_stats = {};
        const inode_stub = () => ({
@ -1358,10 +1233,8 @@ class Mon
            write: { count: 0n, usec: 0n, bytes: 0n },
            delete: { count: 0n, usec: 0n, bytes: 0n },
        });
        const seen_pools = {};
        for (const pool_id in this.state.config.pools)
        {
            seen_pools[pool_id] = true;
            this.state.pool.stats[pool_id] = this.state.pool.stats[pool_id] || {};
            this.state.pool.stats[pool_id].used_raw_tb = 0n;
        }
@ -1369,12 +1242,7 @@ class Mon
        {
            for (const pool_id in this.state.osd.space[osd_num])
            {
-                this.state.pool.stats[pool_id] = this.state.pool.stats[pool_id] || {};
+                this.state.pool.stats[pool_id] = this.state.pool.stats[pool_id] || { used_raw_tb: 0n };
                if (!seen_pools[pool_id])
                {
                    this.state.pool.stats[pool_id].used_raw_tb = 0n;
                    seen_pools[pool_id] = true;
                }
                inode_stats[pool_id] = inode_stats[pool_id] || {};
                for (const inode_num in this.state.osd.space[osd_num][pool_id])
                {
@ -1385,7 +1253,7 @@ class Mon
                }
            }
        }
-        for (const pool_id in seen_pools)
+        for (const pool_id in this.state.config.pools)
        {
            const used = this.state.pool.stats[pool_id].used_raw_tb;
            this.state.pool.stats[pool_id].used_raw_tb = Number(used)/1024/1024/1024/1024;
@ -1408,39 +1276,43 @@ class Mon
                }
            }
        }
        if (prev_stats && prev_timestamp >= timestamp)
        {
            prev_stats = null;
        }
        const tm = prev_stats ? BigInt(timestamp - prev_timestamp) : 0;
        for (const pool_id in inode_stats)
        {
            for (const inode_num in inode_stats[pool_id])
            {
                let nonzero = inode_stats[pool_id][inode_num].raw_used > 0;
                for (const op of [ 'read', 'write', 'delete' ])
                {
                    const op_st = inode_stats[pool_id][inode_num][op];
                    const prev_st = prev_stats && prev_stats[pool_id] && prev_stats[pool_id][inode_num] && prev_stats[pool_id][inode_num][op];
                    op_st.bps = prev_st ? (op_st.bytes - prev_st.bytes) * 1000n / tm : 0;
                    op_st.iops = prev_st ? (op_st.count - prev_st.count) * 1000n / tm : 0;
                    op_st.lat = prev_st ? (op_st.usec - prev_st.usec) / ((op_st.count - prev_st.count) || 1n) : 0;
                    if (op_st.bps > 0 || op_st.iops > 0 || op_st.lat > 0)
                        nonzero = true;
                }
                if (!nonzero && (!this.state.config.inode[pool_id] || !this.state.config.inode[pool_id][inode_num]))
                {
                    // Deleted inode (no data, no I/O, no config)
                    delete inode_stats[pool_id][inode_num];
                }
            }
        }
        return inode_stats;
    }
    fix_stat_overflows(obj, scratch)
    {
        for (const k in obj)
        {
            if (typeof obj[k] == 'bigint')
            {
                if (obj[k] >= 0x10000000000000000n)
                {
                    if (scratch[k])
                    {
                        for (const k2 in scratch)
                        {
                            obj[k2] -= scratch[k2];
                            scratch[k2] = 0n;
                        }
                    }
                    else
                    {
                        for (const k2 in obj)
                        {
                            scratch[k2] = obj[k2];
                        }
                    }
                }
            }
            else if (typeof obj[k] == 'object')
            {
                this.fix_stat_overflows(obj[k], scratch[k] = (scratch[k] || {}));
            }
        }
    }
    serialize_bigints(obj)
    {
        obj = { ...obj };
        for (const k in obj)
        {
            if (typeof obj[k] == 'bigint')
@ -1449,26 +1321,22 @@ class Mon
            }
            else if (typeof obj[k] == 'object')
            {
-                obj[k] = this.serialize_bigints(obj[k]);
+                this.serialize_bigints(obj[k]);
            }
        }
        return obj;
    }
    async update_total_stats()
    {
        const txn = [];
-        const timestamp = Date.now();
+        const stats = this.sum_op_stats();
        const object_counts = this.sum_object_counts();
-        let stats = this.sum_op_stats(timestamp, this.prev_stats);
+        const inode_stats = this.sum_inode_stats();
-        let inode_stats = this.sum_inode_stats(
+        this.fix_stat_overflows(stats, (this.prev_stats = this.prev_stats || {}));
-            this.prev_stats ? this.prev_stats.inode_stats : null,
+        this.fix_stat_overflows(inode_stats, (this.prev_inode_stats = this.prev_inode_stats || {}));
            timestamp, this.prev_stats ? this.prev_stats.timestamp : null
        );
        this.prev_stats = { timestamp, ...stats, inode_stats };
        stats.object_counts = object_counts;
-        stats = this.serialize_bigints(stats);
+        this.serialize_bigints(stats);
-        inode_stats = this.serialize_bigints(inode_stats);
+        this.serialize_bigints(inode_stats);
        txn.push({ requestPut: { key: b64(this.etcd_prefix+'/stats'), value: b64(JSON.stringify(stats)) } });
        for (const pool_id in inode_stats)
        {
@ -1480,25 +1348,11 @@ class Mon
                } });
            }
        }
        for (const pool_id in this.state.inode.stats)
        {
            for (const inode_num in this.state.inode.stats[pool_id])
            {
                if (!inode_stats[pool_id] || !inode_stats[pool_id][inode_num])
                {
                    txn.push({ requestDeleteRange: {
                        key: b64(this.etcd_prefix+'/inode/stats/'+pool_id+'/'+inode_num),
                    } });
                }
            }
        }
        for (const pool_id in this.state.pool.stats)
        {
            const pool_stats = { ...this.state.pool.stats[pool_id] };
            this.serialize_bigints(pool_stats);
            txn.push({ requestPut: {
                key: b64(this.etcd_prefix+'/pool/stats/'+pool_id),
-                value: b64(JSON.stringify(pool_stats)),
+                value: b64(JSON.stringify(this.state.pool.stats[pool_id])),
            } });
        }
        if (txn.length)
@ -1511,13 +1365,20 @@ class Mon
    {
        if (this.stats_timer)
        {
-            return;
+            clearTimeout(this.stats_timer);
            this.stats_timer = null;
        }
        let sleep = (this.stats_update_next||0) - Date.now();
        if (sleep < this.config.mon_stats_timeout)
        {
            sleep = this.config.mon_stats_timeout;
        }
        this.stats_timer = setTimeout(() =>
        {
            this.stats_timer = null;
            this.stats_update_next = Date.now() + this.config.mon_stats_interval;
            this.update_total_stats().catch(console.error);
-        }, this.config.mon_stats_timeout);
+        }, sleep);
    }
    parse_kv(kv)
@ -1557,7 +1418,7 @@ class Mon
        cur[key_parts[key_parts.length-1]] = kv.value;
        if (key === 'config/global')
        {
-            this.config = { ...this.initConfig, ...this.state.config.global };
+            this.config = this.state.config.global;
            this.check_config();
            for (const osd_num in this.state.osd.stats)
            {
@ -1594,15 +1455,12 @@ class Mon
        }
        while (retries < 0 || retry < retries)
        {
-            retry++;
+            const base = this.etcd_urls[Math.floor(Math.random()*this.etcd_urls.length)];
            const base = this.pick_next_etcd();
            const res = await POST(base+path, body, timeout);
            if (res.error)
            {
-                if (this.selected_etcd_url == base)
+                console.error('etcd returned error: '+res.error);
-                    this.selected_etcd_url = null;
+                break;
                console.error('failed to query etcd: '+res.error);
                continue;
            }
            if (res.json)
            {
@ -1611,20 +1469,26 @@ class Mon
                    console.error('etcd returned error: '+res.json.error);
                    break;
                }
                if (this.etcd_urls.length > 1)
                {
                    // Stick to the same etcd for the rest of calls
                    this.etcd_urls = [ base ];
                }
                return res.json;
            }
            retry++;
        }
        this.die();
    }
-    _die(err)
+    die(err)
    {
        // In fact we can just try to rejoin
        console.error(new Error(err || 'Cluster connection failed'));
        process.exit(1);
    }
-    local_ips(all)
+    local_ips()
    {
        const ips = [];
        const ifaces = os.networkInterfaces();
@ -1632,7 +1496,7 @@ class Mon
        {
            for (const iface of ifaces[ifname])
            {
-                if (iface.family == 'IPv4' && !iface.internal || all)
+                if (iface.family == 'IPv4' && !iface.internal)
                {
                    ips.push(iface.address);
                }
--- a/mon/test-optimize-unfeasible.js
+++ b/mon/test-optimize-unfeasible.js
@ -1,33 +0,0 @@
 // Copyright (c) Vitaliy Filippov, 2019+
 // License: VNPL-1.1 (see README.md for details)
 const LPOptimizer = require('./lp-optimizer.js');
 const osd_tree = {
    100: {
        1: 0.1,
        2: 0.1,
        3: 0.1,
    },
    200: {
        4: 0.1,
        5: 0.1,
        6: 0.1,
    },
 };
 async function run()
 {
    let res;
    console.log('256 PGs, 3+3 OSDs, size=2');
    res = await LPOptimizer.optimize_initial({ osd_tree, pg_size: 2, pg_count: 256 });
    LPOptimizer.print_change_stats(res, false);
    // Should NOT fail with the "unfeasible or unbounded" exception
    console.log('\nRemoving osd.2');
    delete osd_tree[100][2];
    res = await LPOptimizer.optimize_change({ prev_pgs: res.int_pgs, osd_tree, pg_size: 2 });
    LPOptimizer.print_change_stats(res, false);
 }
 run().catch(console.error);
--- a/patches/PVE_VitastorPlugin.pm
+++ b/patches/PVE_VitastorPlugin.pm
@ -1,503 +0,0 @@
 # Install as /usr/share/perl5/PVE/Storage/Custom/VitastorPlugin.pm
 # Proxmox Vitastor Driver
 # Copyright (c) Vitaliy Filippov, 2021+
 # License: VNPL-1.1 or GNU AGPLv3.0
 package PVE::Storage::Custom::VitastorPlugin;
 use strict;
 use warnings;
 use JSON;
 use PVE::Storage::Plugin;
 use PVE::Tools qw(run_command);
 use base qw(PVE::Storage::Plugin);
 sub api
 {
    # Trick it :)
    return PVE::Storage->APIVER;
 }
 sub run_cli
 {
    my ($scfg, $cmd, %args) = @_;
    my $retval;
    my $stderr = '';
    my $errmsg = $args{errmsg} ? $args{errmsg}.": " : "vitastor-cli error: ";
    my $json = delete $args{json};
    $json = 1 if !defined $json;
    my $binary = delete $args{binary};
    $binary = '/usr/bin/vitastor-cli' if !defined $binary;
    if (!exists($args{errfunc}))
    {
        $args{errfunc} = sub
        {
            my $line = shift;
            print STDERR $line;
            *STDERR->flush();
            $stderr .= $line;
        };
    }
    if (!exists($args{outfunc}))
    {
        $retval = '';
        $args{outfunc} = sub { $retval .= shift };
        if ($json)
        {
            unshift @$cmd, '--json';
        }
    }
    if ($scfg->{vitastor_etcd_address})
    {
        unshift @$cmd, '--etcd_address', $scfg->{vitastor_etcd_address};
    }
    if ($scfg->{vitastor_config_path})
    {
        unshift @$cmd, '--config_path', $scfg->{vitastor_config_path};
    }
    unshift @$cmd, $binary;
    eval { run_command($cmd, %args); };
    if (my $err = $@)
    {
        die "Error invoking vitastor-cli: $err";
    }
    if (defined $retval)
    {
        # untaint
        $retval =~ /^(.*)$/s;
        if ($json)
        {
            eval { $retval = JSON::decode_json($1); };
            if ($@)
            {
                die "vitastor-cli returned bad JSON: $@";
            }
        }
        else
        {
            $retval = $1;
        }
    }
    return $retval;
 }
 # Configuration
 sub type
 {
    return 'vitastor';
 }
 sub plugindata
 {
    return {
        content => [ { images => 1, rootdir => 1 }, { images => 1 } ],
    };
 }
 sub properties
 {
    return {
        vitastor_etcd_address => {
            description => 'IP address(es) of etcd.',
            type => 'string',
            format => 'pve-storage-portal-dns-list',
        },
        vitastor_etcd_prefix => {
            description => 'Prefix for Vitastor etcd metadata',
            type => 'string',
        },
        vitastor_config_path => {
            description => 'Path to Vitastor configuration file',
            type => 'string',
        },
        vitastor_prefix => {
            description => 'Image name prefix',
            type => 'string',
        },
        vitastor_pool => {
            description => 'Default pool to use for images',
            type => 'string',
        },
        vitastor_nbd => {
            description => 'Use kernel NBD devices (slower)',
            type => 'boolean',
        },
    };
 }
 sub options
 {
    return {
        nodes => { optional => 1 },
        disable => { optional => 1 },
        vitastor_etcd_address => { optional => 1},
        vitastor_etcd_prefix => { optional => 1 },
        vitastor_config_path => { optional => 1 },
        vitastor_prefix => { optional => 1 },
        vitastor_pool => {},
        vitastor_nbd => { optional => 1 },
    };
 }
 # Storage implementation
 sub parse_volname
 {
    my ($class, $volname) = @_;
    if ($volname =~ m/^((base-(\d+)-\S+)\/)?((?:(base)|(vm))-(\d+)-\S+)$/)
    {
        # ($vtype, $name, $vmid, $basename, $basevmid, $isBase, $format)
        return ('images', $4, $7, $2, $3, $5, 'raw');
    }
    die "unable to parse vitastor volume name '$volname'\n";
 }
 sub _qemu_option
 {
    my ($k, $v) = @_;
    if (defined $v && $v ne "")
    {
        $v =~ s/:/\\:/gso;
        return ":$k=$v";
    }
    return "";
 }
 sub path
 {
    my ($class, $scfg, $volname, $storeid, $snapname) = @_;
    my $prefix = defined $scfg->{vitastor_prefix} ? $scfg->{vitastor_prefix} : 'pve/';
    my ($vtype, $name, $vmid) = $class->parse_volname($volname);
    $name .= '@'.$snapname if $snapname;
    if ($scfg->{vitastor_nbd})
    {
        my $mapped = run_cli($scfg, [ 'ls' ], binary => '/usr/bin/vitastor-nbd');
        my ($kerneldev) = grep { $mapped->{$_}->{image} eq $prefix.$name } keys %$mapped;
        die "Image not mapped via NBD" if !$kerneldev;
        return ($kerneldev, $vmid, $vtype);
    }
    my $path = "vitastor";
    $path .= _qemu_option('config_path', $scfg->{vitastor_config_path});
    # FIXME This is the only exception: etcd_address -> etcd_host for qemu
    $path .= _qemu_option('etcd_host', $scfg->{vitastor_etcd_address});
    $path .= _qemu_option('etcd_prefix', $scfg->{vitastor_etcd_prefix});
    $path .= _qemu_option('image', $prefix.$name);
    return ($path, $vmid, $vtype);
 }
 sub _find_free_diskname
 {
    my ($class, $storeid, $scfg, $vmid, $fmt, $add_fmt_suffix) = @_;
    my $list = _process_list($scfg, $storeid, run_cli($scfg, [ 'ls' ]));
    $list = [ map { $_->{name} } @$list ];
    return PVE::Storage::Plugin::get_next_vm_diskname($list, $storeid, $vmid, undef, $scfg);
 }
 # Used only in "Create Template" and, in fact, converts a VM into a template
 # As a consequence, this is always invoked with the VM powered off
 # So we just rename vm-xxx to base-xxx and make it a readonly base layer
 sub create_base
 {
    my ($class, $storeid, $scfg, $volname) = @_;
    my $prefix = defined $scfg->{vitastor_prefix} ? $scfg->{vitastor_prefix} : 'pve/';
    my ($vtype, $name, $vmid, $basename, $basevmid, $isBase) = $class->parse_volname($volname);
    die "create_base not possible with base image\n" if $isBase;
    my $info = _process_list($scfg, $storeid, run_cli($scfg, [ 'ls', $prefix.$name ]))->[0];
    die "image $name does not exist\n" if !$info;
    die "volname '$volname' contains wrong information about parent {$info->{parent}} $basename\n"
        if $basename && (!$info->{parent} || $info->{parent} ne $basename);
    my $newname = $name;
    $newname =~ s/^vm-/base-/;
    my $newvolname = $basename ? "$basename/$newname" : "$newname";
    run_cli($scfg, [ 'modify', '--rename', $prefix.$newname, '--readonly', $prefix.$name ], json => 0);
    return $newvolname;
 }
 sub clone_image
 {
    my ($class, $scfg, $storeid, $volname, $vmid, $snapname) = @_;
    my $prefix = defined $scfg->{vitastor_prefix} ? $scfg->{vitastor_prefix} : 'pve/';
    my $snap = '';
    $snap = '@'.$snapname if length $snapname;
    my ($vtype, $basename, $basevmid, undef, undef, $isBase) = $class->parse_volname($volname);
    die "$volname is not a base image and snapname is not provided\n" if !$isBase && !length($snapname);
    my $name = $class->find_free_diskname($storeid, $scfg, $vmid);
    warn "clone $volname: $basename snapname $snap to $name\n";
    my $newvol = "$basename/$name";
    $newvol = $name if length($snapname);
    run_cli($scfg, [ 'create', '--parent', $prefix.$basename.$snap, $prefix.$name ], json => 0);
    return $newvol;
 }
 sub alloc_image
 {
    # $size is in kb in this method
    my ($class, $storeid, $scfg, $vmid, $fmt, $name, $size) = @_;
    my $prefix = defined $scfg->{vitastor_prefix} ? $scfg->{vitastor_prefix} : 'pve/';
    die "illegal name '$name' - should be 'vm-$vmid-*'\n" if $name && $name !~ m/^vm-$vmid-/;
    $name = $class->find_free_diskname($storeid, $scfg, $vmid) if !$name;
    run_cli($scfg, [ 'create', '--size', (int(($size+3)/4)*4).'k', '--pool', $scfg->{vitastor_pool}, $prefix.$name ], json => 0);
    return $name;
 }
 sub free_image
 {
    my ($class, $storeid, $scfg, $volname, $isBase) = @_;
    my $prefix = defined $scfg->{vitastor_prefix} ? $scfg->{vitastor_prefix} : 'pve/';
    my ($vtype, $name, $vmid, undef, undef, undef) = $class->parse_volname($volname);
    $class->deactivate_volume($storeid, $scfg, $volname);
    my $full_list = run_cli($scfg, [ 'ls', '-l' ]);
    my $list = _process_list($scfg, $storeid, $full_list);
    # Remove image and all its snapshots
    my $rm_names = {
        map { ($prefix.$_->{name} => 1) }
        grep { $_->{name} eq $name || substr($_->{name}, 0, length($name)+1) eq ($name.'@') }
        @$list
    };
    my $children = [ grep { $_->{parent_name} && $rm_names->{$_->{parent_name}} } @$full_list ];
    die "Image has children: ".join(', ', map {
        substr($_->{name}, 0, length $prefix) eq $prefix
            ? substr($_->name, length $prefix)
            : $_->{name}
    } @$children)."\n" if @$children;
    my $to_remove = [ grep { $rm_names->{$_->{name}} } @$full_list ];
    for my $rmi (@$to_remove)
    {
        run_cli($scfg, [ 'rm-data', '--pool', $rmi->{pool_id}, '--inode', $rmi->{inode_num} ], json => 0);
    }
    for my $rmi (@$to_remove)
    {
        run_cli($scfg, [ 'rm', $rmi->{name} ], json => 0);
    }
    return undef;
 }
 sub _process_list
 {
    my ($scfg, $storeid, $result) = @_;
    my $prefix = defined $scfg->{vitastor_prefix} ? $scfg->{vitastor_prefix} : 'pve/';
    my $list = [];
    foreach my $el (@$result)
    {
        next if !$el->{name} || length($prefix) && substr($el->{name}, 0, length $prefix) ne $prefix;
        my $name = substr($el->{name}, length $prefix);
        next if $name =~ /@/;
        my ($owner) = $name =~ /^(?:vm|base)-(\d+)-/s;
        next if !defined $owner;
        my $parent = !defined $el->{parent_name}
            ? undef
            : ($prefix eq '' || substr($el->{parent_name}, 0, length $prefix) eq $prefix
                ? substr($el->{parent_name}, length $prefix) : '');
        my $volid = $parent && $parent =~ /^(base-\d+-\S+)$/s
            ? "$storeid:$1/$name" : "$storeid:$name";
        push @$list, {
            format => 'raw',
            volid => $volid,
            name => $name,
            size => $el->{size},
            parent => $parent,
            vmid => $owner,
        };
    }
    return $list;
 }
 sub list_images
 {
    my ($class, $storeid, $scfg, $vmid, $vollist, $cache) = @_;
    my $list = _process_list($scfg, $storeid, run_cli($scfg, [ 'ls', '-l' ]));
    if ($vollist)
    {
        my $h = { map { ($_ => 1) } @$vollist };
        $list = [ grep { $h->{$_->{volid}} } @$list ]
    }
    elsif (defined $vmid)
    {
        $list = [ grep { $_->{vmid} eq $vmid } @$list ];
    }
    return $list;
 }
 sub status
 {
    my ($class, $storeid, $scfg, $cache) = @_;
    my $stats = [ grep { $_->{name} eq $scfg->{vitastor_pool} } @{ run_cli($scfg, [ 'df' ]) } ]->[0];
    my $free = $stats ? $stats->{max_available} : 0;
    my $used = $stats ? $stats->{used_raw}/($stats->{raw_to_usable}||1) : 0;
    my $total = $free+$used;
    my $active = $stats ? 1 : 0;
    return ($total, $free, $used, $active);
 }
 sub activate_storage
 {
    my ($class, $storeid, $scfg, $cache) = @_;
    return 1;
 }
 sub deactivate_storage
 {
    my ($class, $storeid, $scfg, $cache) = @_;
    return 1;
 }
 sub map_volume
 {
    my ($class, $storeid, $scfg, $volname, $snapname) = @_;
    my $prefix = defined $scfg->{vitastor_prefix} ? $scfg->{vitastor_prefix} : 'pve/';
    my ($vtype, $img_name, $vmid) = $class->parse_volname($volname);
    my $name = $img_name;
    $name .= '@'.$snapname if $snapname;
    my $mapped = run_cli($scfg, [ 'ls' ], binary => '/usr/bin/vitastor-nbd');
    my ($kerneldev) = grep { $mapped->{$_}->{image} eq $prefix.$name } keys %$mapped;
    return $kerneldev if $kerneldev && -b $kerneldev; # already mapped
    $kerneldev = run_cli($scfg, [ 'map', '--image', $prefix.$name ], binary => '/usr/bin/vitastor-nbd', json => 0);
    return $kerneldev;
 }
 sub unmap_volume
 {
    my ($class, $storeid, $scfg, $volname, $snapname) = @_;
    my $prefix = defined $scfg->{vitastor_prefix} ? $scfg->{vitastor_prefix} : 'pve/';
    return 1 if !$scfg->{vitastor_nbd};
    my ($vtype, $name, $vmid) = $class->parse_volname($volname);
    $name .= '@'.$snapname if $snapname;
    my $mapped = run_cli($scfg, [ 'ls' ], binary => '/usr/bin/vitastor-nbd');
    my ($kerneldev) = grep { $mapped->{$_}->{image} eq $prefix.$name } keys %$mapped;
    if ($kerneldev && -b $kerneldev)
    {
        run_cli($scfg, [ 'unmap', $kerneldev ], binary => '/usr/bin/vitastor-nbd', json => 0);
    }
    return 1;
 }
 sub activate_volume
 {
    my ($class, $storeid, $scfg, $volname, $snapname, $cache) = @_;
    $class->map_volume($storeid, $scfg, $volname, $snapname) if $scfg->{vitastor_nbd};
    return 1;
 }
 sub deactivate_volume
 {
    my ($class, $storeid, $scfg, $volname, $snapname, $cache) = @_;
    $class->unmap_volume($storeid, $scfg, $volname, $snapname);
    return 1;
 }
 sub volume_size_info
 {
    my ($class, $scfg, $storeid, $volname, $timeout) = @_;
    my $prefix = defined $scfg->{vitastor_prefix} ? $scfg->{vitastor_prefix} : 'pve/';
    my ($vtype, $name, $vmid) = $class->parse_volname($volname);
    my $info = _process_list($scfg, $storeid, run_cli($scfg, [ 'ls', $prefix.$name ]))->[0];
    #return wantarray ? ($size, $format, $used, $parent, $st->ctime) : $size;
    return $info->{size};
 }
 sub volume_resize
 {
    my ($class, $scfg, $storeid, $volname, $size, $running) = @_;
    my $prefix = defined $scfg->{vitastor_prefix} ? $scfg->{vitastor_prefix} : 'pve/';
    my ($vtype, $name, $vmid) = $class->parse_volname($volname);
    # $size is in bytes in this method
    run_cli($scfg, [ 'modify', '--resize', (int(($size+4095)/4096)*4).'k', $prefix.$name ], json => 0);
    return undef;
 }
 sub volume_snapshot
 {
    my ($class, $scfg, $storeid, $volname, $snap) = @_;
    my $prefix = defined $scfg->{vitastor_prefix} ? $scfg->{vitastor_prefix} : 'pve/';
    my ($vtype, $name, $vmid) = $class->parse_volname($volname);
    run_cli($scfg, [ 'create', '--snapshot', $snap, $prefix.$name ], json => 0);
    return undef;
 }
 sub volume_snapshot_rollback
 {
    my ($class, $scfg, $storeid, $volname, $snap) = @_;
    my $prefix = defined $scfg->{vitastor_prefix} ? $scfg->{vitastor_prefix} : 'pve/';
    my ($vtype, $name, $vmid) = $class->parse_volname($volname);
    run_cli($scfg, [ 'rm', $prefix.$name ], json => 0);
    run_cli($scfg, [ 'create', '--parent', $prefix.$name.'@'.$snap, $prefix.$name ], json => 0);
    return undef;
 }
 sub volume_snapshot_delete
 {
    my ($class, $scfg, $storeid, $volname, $snap, $running) = @_;
    my $prefix = defined $scfg->{vitastor_prefix} ? $scfg->{vitastor_prefix} : 'pve/';
    my ($vtype, $name, $vmid) = $class->parse_volname($volname);
    run_cli($scfg, [ 'rm', $prefix.$name.'@'.$snap ], json => 0);
    return undef;
 }
 sub volume_snapshot_needs_fsfreeze
 {
    return 1;
 }
 sub volume_has_feature
 {
    my ($class, $scfg, $feature, $storeid, $volname, $snapname, $running) = @_;
    my $features = {
        snapshot => { current => 1, snap => 1 },
        clone => { base => 1, snap => 1 },
        template => { current => 1 },
        copy => { base => 1, current => 1, snap => 1 },
        sparseinit => { base => 1, current => 1 },
        rename => { current => 1 },
    };
    my ($vtype, $name, $vmid, $basename, $basevmid, $isBase) = $class->parse_volname($volname);
    my $key = undef;
    if ($snapname)
    {
        $key = 'snap';
    }
    else
    {
        $key = $isBase ? 'base' : 'current';
    }
    return 1 if $features->{$feature}->{$key};
    return undef;
 }
 sub rename_volume
 {
    my ($class, $scfg, $storeid, $source_volname, $target_vmid, $target_volname) = @_;
    my $prefix = defined $scfg->{vitastor_prefix} ? $scfg->{vitastor_prefix} : 'pve/';
    my (undef, $source_image, $source_vmid, $base_name, $base_vmid, undef, $format) =
        $class->parse_volname($source_volname);
    $target_volname = $class->find_free_diskname($storeid, $scfg, $target_vmid, $format) if !$target_volname;
    run_cli($scfg, [ 'modify', '--rename', $prefix.$target_volname, $prefix.$source_image ], json => 0);
    $base_name = $base_name ? "${base_name}/" : '';
    return "${storeid}:${base_name}${target_volname}";
 }
 1;
--- a/patches/cinder-vitastor.py
+++ b/patches/cinder-vitastor.py
@ -1,964 +0,0 @@
 # Workaround:
 # 461: allow to create volume from snapshot
 # 527: adjust iodepth for faster deletion
 # 591: add failure case when creating a volume 
 # Vitastor Driver for OpenStack Cinder
 #
 # --------------------------------------------
 # Install as cinder/volume/drivers/vitastor.py
 # --------------------------------------------
 #
 # Copyright 2020 Vitaliy Filippov
 #
 # Licensed under the Apache License, Version 2.0 (the "License"); you may
 # not use this file except in compliance with the License. You may obtain
 # a copy of the License at
 #
 # http://www.apache.org/licenses/LICENSE-2.0
 #
 # Unless required by applicable law or agreed to in writing, software
 # distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 # License for the specific language governing permissions and limitations
 # under the License.
 """Cinder Vitastor Driver"""
 import binascii
 import base64
 import errno
 import json
 import math
 import os
 import tempfile
 from castellan import key_manager
 from oslo_config import cfg
 from oslo_log import log as logging
 from oslo_service import loopingcall
 from oslo_concurrency import processutils
 from oslo_utils import encodeutils
 from oslo_utils import excutils
 from oslo_utils import fileutils
 from oslo_utils import units
 import six
 from six.moves.urllib import request
 from cinder import exception
 from cinder.i18n import _
 from cinder.image import image_utils
 from cinder import interface
 from cinder import objects
 from cinder.objects import fields
 from cinder import utils
 from cinder.volume import configuration
 from cinder.volume import driver
 from cinder.volume import volume_utils
 VERSION = '0.6.10'
 LOG = logging.getLogger(__name__)
 VITASTOR_OPTS = [
    cfg.StrOpt(
        'vitastor_config_path',
        default='/etc/vitastor/vitastor.conf',
        help='Vitastor configuration file path'
    ),
    cfg.StrOpt(
        'vitastor_etcd_address',
        default='',
        help='Vitastor etcd address(es)'),
    cfg.StrOpt(
        'vitastor_etcd_prefix',
        default='/vitastor',
        help='Vitastor etcd prefix'
    ),
    cfg.StrOpt(
        'vitastor_pool_id',
        default='',
        help='Vitastor pool ID to use for volumes'
    ),
    # FIXME exclusive_cinder_pool ?
 ]
 CONF = cfg.CONF
 CONF.register_opts(VITASTOR_OPTS, group = configuration.SHARED_CONF_GROUP)
 class VitastorDriverException(exception.VolumeDriverException):
    message = _("Vitastor Cinder driver failure: %(reason)s")
@interface.volumedriver
 class VitastorDriver(driver.CloneableImageVD,
    driver.ManageableVD, driver.ManageableSnapshotsVD,
    driver.BaseVD):
    """Implements Vitastor volume commands."""
    cfg = {}
    _etcd_urls = []
    def __init__(self, active_backend_id = None, *args, **kwargs):
        super(VitastorDriver, self).__init__(*args, **kwargs)
        self.configuration.append_config_values(VITASTOR_OPTS)
    @classmethod
    def get_driver_options(cls):
        additional_opts = cls._get_oslo_driver_opts(
            'reserved_percentage',
            'max_over_subscription_ratio',
            'volume_dd_blocksize'
        )
        return VITASTOR_OPTS + additional_opts
    def do_setup(self, context):
        """Performs initialization steps that could raise exceptions."""
        super(VitastorDriver, self).do_setup(context)
        # Make sure configuration is in UTF-8
        for attr in [ 'config_path', 'etcd_address', 'etcd_prefix', 'pool_id' ]:
            val = self.configuration.safe_get('vitastor_'+attr)
            if val is not None:
                self.cfg[attr] = utils.convert_str(val)
        self.cfg = self._load_config(self.cfg)
    def _load_config(self, cfg):
        # Try to load configuration file
        try:
            f = open(cfg['config_path'] or '/etc/vitastor/vitastor.conf')
            conf = json.loads(f.read())
            f.close()
            for k in conf:
                cfg[k] = cfg.get(k, conf[k])
        except:
            pass
        if isinstance(cfg['etcd_address'], str):
            cfg['etcd_address'] = cfg['etcd_address'].split(',')
        # Sanitize etcd URLs
        for i, etcd_url in enumerate(cfg['etcd_address']):
            ssl = False
            if etcd_url.lower().startswith('http://'):
                etcd_url = etcd_url[7:]
            elif etcd_url.lower().startswith('https://'):
                etcd_url = etcd_url[8:]
                ssl = True
            if etcd_url.find('/') < 0:
                etcd_url += '/v3'
            if ssl:
                etcd_url = 'https://'+etcd_url
            else:
                etcd_url = 'http://'+etcd_url
            cfg['etcd_address'][i] = etcd_url
        return cfg
    def check_for_setup_error(self):
        """Returns an error if prerequisites aren't met."""
    def _encode_etcd_key(self, key):
        if not isinstance(key, bytes):
            key = str(key).encode('utf-8')
        return base64.b64encode(self.cfg['etcd_prefix'].encode('utf-8')+b'/'+key).decode('utf-8')
    def _encode_etcd_value(self, value):
        if not isinstance(value, bytes):
            value = str(value).encode('utf-8')
        return base64.b64encode(value).decode('utf-8')
    def _encode_etcd_requests(self, obj):
        for v in obj:
            for rt in v:
                if 'key' in v[rt]:
                    v[rt]['key'] = self._encode_etcd_key(v[rt]['key'])
                if 'range_end' in v[rt]:
                    v[rt]['range_end'] = self._encode_etcd_key(v[rt]['range_end'])
                if 'value' in v[rt]:
                    v[rt]['value'] = self._encode_etcd_value(v[rt]['value'])
    def _etcd_txn(self, params):
        if 'compare' in params:
            for v in params['compare']:
                if 'key' in v:
                    v['key'] = self._encode_etcd_key(v['key'])
        if 'failure' in params:
            self._encode_etcd_requests(params['failure'])
        if 'success' in params:
            self._encode_etcd_requests(params['success'])
        body = json.dumps(params).encode('utf-8')
        headers = {
            'Content-Type': 'application/json'
        }
        err = None
        for etcd_url in self.cfg['etcd_address']:
            try:
                resp = request.urlopen(request.Request(etcd_url+'/kv/txn', body, headers), timeout = 5)
                data = json.loads(resp.read())
                if 'responses' not in data:
                    data['responses'] = []
                for i, resp in enumerate(data['responses']):
                    if 'response_range' in resp:
                        if 'kvs' not in resp['response_range']:
                            resp['response_range']['kvs'] = []
                        for kv in resp['response_range']['kvs']:
                            kv['key'] = base64.b64decode(kv['key'].encode('utf-8')).decode('utf-8')
                            if kv['key'].startswith(self.cfg['etcd_prefix']+'/'):
                                kv['key'] = kv['key'][len(self.cfg['etcd_prefix'])+1 : ]
                            kv['value'] = json.loads(base64.b64decode(kv['value'].encode('utf-8')))
                    if len(resp.keys()) != 1:
                        LOG.exception('unknown responses['+str(i)+'] format: '+json.dumps(resp))
                    else:
                        resp = data['responses'][i] = resp[list(resp.keys())[0]]
                return data
            except Exception as e:
                LOG.exception('error calling etcd transaction: '+body.decode('utf-8')+'\nerror: '+str(e))
                err = e
        raise err
    def _etcd_foreach(self, prefix, add_fn):
        total = 0
        batch = 1000
        begin = prefix+'/'
        while True:
            resp = self._etcd_txn({ 'success': [
                { 'request_range': {
                    'key': begin,
                    'range_end': prefix+'0',
                    'limit': batch+1,
                } },
            ] })
            i = 0
            while i < batch and i < len(resp['responses'][0]['kvs']):
                kv = resp['responses'][0]['kvs'][i]
                add_fn(kv)
                i += 1
            if len(resp['responses'][0]['kvs']) <= batch:
                break
            begin = resp['responses'][0]['kvs'][batch]['key']
        return total
    def _update_volume_stats(self):
        location_info = json.dumps({
            'config': self.configuration.vitastor_config_path,
            'etcd_address': self.configuration.vitastor_etcd_address,
            'etcd_prefix': self.configuration.vitastor_etcd_prefix,
            'pool_id': self.configuration.vitastor_pool_id,
        })
        stats = {
            'vendor_name': 'Vitastor',
            'driver_version': self.VERSION,
            'storage_protocol': 'vitastor',
            'total_capacity_gb': 'unknown',
            'free_capacity_gb': 'unknown',
            # FIXME check if safe_get is required
            'reserved_percentage': self.configuration.safe_get('reserved_percentage'),
            'multiattach': True,
            'thin_provisioning_support': True,
            'max_over_subscription_ratio': self.configuration.safe_get('max_over_subscription_ratio'),
            'location_info': location_info,
            'backend_state': 'down',
            'volume_backend_name': self.configuration.safe_get('volume_backend_name') or 'vitastor',
            'replication_enabled': False,
        }
        try:
            pool_stats = self._etcd_txn({ 'success': [
                { 'request_range': { 'key': 'pool/stats/'+str(self.cfg['pool_id']) } }
            ] })
            total_provisioned = 0
            def add_total(kv):
                nonlocal total_provisioned
                if kv['key'].find('@') >= 0:
                    total_provisioned += kv['value']['size']
            self._etcd_foreach('config/inode/'+str(self.cfg['pool_id']), lambda kv: add_total(kv))
            stats['provisioned_capacity_gb'] = round(total_provisioned/1024.0/1024.0/1024.0, 2)
            pool_stats = pool_stats['responses'][0]['kvs']
            if len(pool_stats):
                pool_stats = pool_stats[0]['value']
                stats['free_capacity_gb'] = round(1024.0*(pool_stats['total_raw_tb']-pool_stats['used_raw_tb'])/pool_stats['raw_to_usable'], 2)
                stats['total_capacity_gb'] = round(1024.0*pool_stats['total_raw_tb'], 2)
            stats['backend_state'] = 'up'
        except Exception as e:
            # just log and return unknown capacities
            LOG.exception('error getting vitastor pool stats: '+str(e))
        self._stats = stats
    def get_volume_stats(self, refresh=False):
        """Get volume stats.
        If 'refresh' is True, run update the stats first.
        """
        if not self._stats or refresh:
            self._update_volume_stats()
        return self._stats
    def _next_id(self, resp):
        if len(resp['kvs']) == 0:
            return (1, 0)
        else:
            return (1 + resp['kvs'][0]['value'], resp['kvs'][0]['mod_revision'])
    def create_volume(self, volume):
        """Creates a logical volume."""
        size = int(volume.size) * units.Gi
        # FIXME: Check if convert_str is really required
        vol_name = utils.convert_str(volume.name)
        if vol_name.find('@') >= 0 or vol_name.find('/') >= 0:
            raise exception.VolumeBackendAPIException(data = '@ and / are forbidden in volume and snapshot names')
        LOG.debug("creating volume '%s'", vol_name)
        self._create_image(vol_name, { 'size': size })
        if volume.encryption_key_id:
            self._create_encrypted_volume(volume, volume.obj_context)
        volume_update = {}
        return volume_update
    def _create_encrypted_volume(self, volume, context):
        """Create a new LUKS encrypted image directly in Vitastor."""
        vol_name = utils.convert_str(volume.name)
        f, opts = self._encrypt_opts(volume, context)
        # FIXME: Check if it works at all :-)
        self._execute(
            'qemu-img', 'convert', '-f', 'luks', *opts,
            'vitastor:image='+vol_name.replace(':', '\\:')+self._qemu_args(),
            '%sM' % (volume.size * 1024)
        )
        f.close()
    def _encrypt_opts(self, volume, context):
        encryption = volume_utils.check_encryption_provider(self.db, volume, context)
        # Fetch the key associated with the volume and decode the passphrase
        keymgr = key_manager.API(CONF)
        key = keymgr.get(context, encryption['encryption_key_id'])
        passphrase = binascii.hexlify(key.get_encoded()).decode('utf-8')
        # Decode the dm-crypt style cipher spec into something qemu-img can use
        cipher_spec = image_utils.decode_cipher(encryption['cipher'], encryption['key_size'])
        tmp_dir = volume_utils.image_conversion_dir()
        f = tempfile.NamedTemporaryFile(prefix = 'luks_', dir = tmp_dir)
        f.write(passphrase)
        f.flush()
        return (f, [
            '--object', 'secret,id=luks_sec,format=raw,file=%(passfile)s' % {'passfile': f.name},
            '-o', 'key-secret=luks_sec,cipher-alg=%(cipher_alg)s,cipher-mode=%(cipher_mode)s,ivgen-alg=%(ivgen_alg)s' % cipher_spec,
        ])
    def create_snapshot(self, snapshot):
        """Creates a volume snapshot."""
        vol_name = utils.convert_str(snapshot.volume_name)
        snap_name = utils.convert_str(snapshot.name)
        if snap_name.find('@') >= 0 or snap_name.find('/') >= 0:
            raise exception.VolumeBackendAPIException(data = '@ and / are forbidden in volume and snapshot names')
        self._create_snapshot(vol_name, vol_name+'@'+snap_name)
    def snapshot_revert_use_temp_snapshot(self):
        """Disable the use of a temporary snapshot on revert."""
        return False
    def revert_to_snapshot(self, context, volume, snapshot):
        """Revert a volume to a given snapshot."""
        # FIXME Delete the image, then recreate it from the snapshot
    def delete_snapshot(self, snapshot):
        """Deletes a snapshot."""
        vol_name = utils.convert_str(snapshot.volume_name)
        snap_name = utils.convert_str(snapshot.name)
        # Find the snapshot
        resp = self._etcd_txn({ 'success': [
            { 'request_range': { 'key': 'index/image/'+vol_name+'@'+snap_name } },
        ] })
        if len(resp['responses'][0]['kvs']) == 0:
            raise exception.SnapshotNotFound(snapshot_id = snap_name)
        inode_id = int(resp['responses'][0]['kvs'][0]['value']['id'])
        pool_id = int(resp['responses'][0]['kvs'][0]['value']['pool_id'])
        parents = {}
        parents[(pool_id << 48) | (inode_id & 0xffffffffffff)] = True
        # Check if there are child volumes
        children = self._child_count(parents)
        if children > 0:
            raise exception.SnapshotIsBusy(snapshot_name = snap_name)
        # FIXME: We can't delete snapshots because we can't merge layers yet
        raise exception.VolumeBackendAPIException(data = 'Snapshot delete (layer merge) is not implemented yet')
    def _child_count(self, parents):
        children = 0
        def add_child(kv):
            nonlocal children
            children += self._check_parent(kv, parents)
        self._etcd_foreach('config/inode', lambda kv: add_child(kv))
        return children
    def _check_parent(self, kv, parents):
        if 'parent_id' not in kv['value']:
            return 0
        parent_id = kv['value']['parent_id']
        _, _, pool_id, inode_id = kv['key'].split('/')
        parent_pool_id = pool_id
        if 'parent_pool_id' in kv['value'] and kv['value']['parent_pool_id']:
            parent_pool_id = kv['value']['parent_pool_id']
        inode = (int(pool_id) << 48) | (int(inode_id) & 0xffffffffffff)
        parent = (int(parent_pool_id) << 48) | (int(parent_id) & 0xffffffffffff)
        if parent in parents and inode not in parents:
            return 1
        return 0
    def create_cloned_volume(self, volume, src_vref):
        """Create a cloned volume from another volume."""
        size = int(volume.size) * units.Gi
        src_name = utils.convert_str(src_vref.name)
        dest_name = utils.convert_str(volume.name)
        if dest_name.find('@') >= 0 or dest_name.find('/') >= 0:
            raise exception.VolumeBackendAPIException(data = '@ and / are forbidden in volume and snapshot names')
        # FIXME Do full copy if requested (cfg.disable_clone)
        if src_vref.admin_metadata.get('readonly') == 'True':
            # source volume is a volume-image cache entry or other readonly volume
            # clone without intermediate snapshot
            src = self._get_image(src_name)
            LOG.debug("creating image '%s' from '%s'", dest_name, src_name)
            new_cfg = self._create_image(dest_name, {
                'size': size,
                'parent_id': src['idx']['id'],
                'parent_pool_id': src['idx']['pool_id'],
            })
            return {}
        clone_snap = "%s@%s.clone_snap" % (src_name, dest_name)
        make_img = True
        if (volume.display_name and
            volume.display_name.startswith('image-') and
            src_vref.project_id != volume.project_id):
            # idiotic openstack creates image-volume cache entries
            # as clones of normal VM volumes... :-X prevent it :-D
            clone_snap = dest_name
            make_img = False
        LOG.debug("creating layer '%s' under '%s'", clone_snap, src_name)
        new_cfg = self._create_snapshot(src_name, clone_snap, True)
        if make_img:
            # Then create a clone from it
            new_cfg = self._create_image(dest_name, {
                'size': size,
                'parent_id': new_cfg['parent_id'],
                'parent_pool_id': new_cfg['parent_pool_id'],
            })
        return {}
    def create_volume_from_snapshot(self, volume, snapshot):
        """Creates a cloned volume from an existing snapshot."""
        vol_name = utils.convert_str(volume.name)
        snap_name = utils.convert_str(snapshot.name)
        snap = self._get_image("volume-"+snapshot.volume_id+'@'+snap_name)
        if not snap:
            raise exception.SnapshotNotFound(snapshot_id = snap_name)
        snap_inode_id = int(resp['responses'][0]['kvs'][0]['value']['id'])
        snap_pool_id = int(resp['responses'][0]['kvs'][0]['value']['pool_id'])
        size = snap['cfg']['size']
        if int(volume.size):
            size = int(volume.size) * units.Gi
        new_cfg = self._create_image(vol_name, {
            'size': size,
            'parent_id': snap['idx']['id'],
            'parent_pool_id': snap['idx']['pool_id'],
        })
        return {}
    def _vitastor_args(self):
        args = []
        for k in [ 'config_path', 'etcd_address', 'etcd_prefix' ]:
            v = self.configuration.safe_get('vitastor_'+k)
            if v:
                args.extend(['--'+k, v])
        return args
    def _qemu_args(self):
        args = ''
        for k in [ 'config_path', 'etcd_address', 'etcd_prefix' ]:
            v = self.configuration.safe_get('vitastor_'+k)
            kk = k
            if kk == 'etcd_address':
                # FIXME use etcd_address in qemu driver
                kk = 'etcd_host'
            if v:
                args += ':'+kk.replace('_', '-')+'='+v.replace(':', '\\:')
        return args
    def delete_volume(self, volume):
        """Deletes a logical volume."""
        vol_name = utils.convert_str(volume.name)
        # Find the volume and all its snapshots
        range_end = b'index/image/' + vol_name.encode('utf-8')
        range_end = range_end[0 : len(range_end)-1] + six.int2byte(range_end[len(range_end)-1] + 1)
        resp = self._etcd_txn({ 'success': [
            { 'request_range': { 'key': 'index/image/'+vol_name, 'range_end': range_end } },
        ] })
        if len(resp['responses'][0]['kvs']) == 0:
            # already deleted
            LOG.info("volume %s no longer exists in backend", vol_name)
            return
        layers = resp['responses'][0]['kvs']
        layer_ids = {}
        for kv in layers:
            inode_id = int(kv['value']['id'])
            pool_id = int(kv['value']['pool_id'])
            inode_pool_id = (pool_id << 48) | (inode_id & 0xffffffffffff)
            layer_ids[inode_pool_id] = True
        # Check if the volume has clones and raise 'busy' if so
        children = self._child_count(layer_ids)
        if children > 0:
            raise exception.VolumeIsBusy(volume_name = vol_name)
        # Clear data
        for kv in layers:
            args = [
                'vitastor-cli', 'rm-data', '--pool', str(kv['value']['pool_id']),
                '--inode', str(kv['value']['id']), '--iodepth', '4', '--progress', '0',
                *(self._vitastor_args())
            ]
            try:
                self._execute(*args)
            except processutils.ProcessExecutionError as exc:
                LOG.error("Failed to remove layer "+kv['key']+": "+exc)
                raise exception.VolumeBackendAPIException(data = exc.stderr)
        # Delete all layers from etcd
        requests = []
        for kv in layers:
            requests.append({ 'request_delete_range': { 'key': kv['key'] } })
            requests.append({ 'request_delete_range': { 'key': 'config/inode/'+str(kv['value']['pool_id'])+'/'+str(kv['value']['id']) } })
        self._etcd_txn({ 'success': requests })
    def retype(self, context, volume, new_type, diff, host):
        """Change extra type specifications for a volume."""
        # FIXME Maybe (in the future) support multiple pools as different types
        return True, {}
    def ensure_export(self, context, volume):
        """Synchronously recreates an export for a logical volume."""
        pass
    def create_export(self, context, volume, connector):
        """Exports the volume."""
        pass
    def remove_export(self, context, volume):
        """Removes an export for a logical volume."""
        pass
    def _create_image(self, vol_name, cfg):
        pool_s = str(self.cfg['pool_id'])
        image_id = 0
        while image_id == 0:
            # check if the image already exists and find a free ID
            resp = self._etcd_txn({ 'success': [
                { 'request_range': { 'key': 'index/image/'+vol_name } },
                { 'request_range': { 'key': 'index/maxid/'+pool_s } },
            ] })
            if len(resp['responses'][0]['kvs']) > 0:
                # already exists
                raise exception.VolumeBackendAPIException(data = 'Volume '+vol_name+' already exists')
            image_id, id_mod = self._next_id(resp['responses'][1])
            # try to create the image
            resp = self._etcd_txn({ 'compare': [
                { 'target': 'MOD', 'mod_revision': id_mod, 'key': 'index/maxid/'+pool_s },
                { 'target': 'VERSION', 'version': 0, 'key': 'index/image/'+vol_name },
                { 'target': 'VERSION', 'version': 0, 'key': 'config/inode/'+pool_s+'/'+str(image_id) },
            ], 'success': [
                { 'request_put': { 'key': 'index/maxid/'+pool_s, 'value': image_id } },
                { 'request_put': { 'key': 'index/image/'+vol_name, 'value': json.dumps({
                    'id': image_id, 'pool_id': self.cfg['pool_id']
                }) } },
                { 'request_put': { 'key': 'config/inode/'+pool_s+'/'+str(image_id), 'value': json.dumps({
                    **cfg, 'name': vol_name,
                }) } },
            ], 'failure': [
                { 'request_put': { 'key': 'index/maxid/'+pool_s, 'value': image_id } },
            ] })
            if not resp.get('succeeded'):
                # repeat
                image_id = 0
    def _create_snapshot(self, vol_name, snap_vol_name, allow_existing = False):
        while True:
            # check if the image already exists and snapshot doesn't
            resp = self._etcd_txn({ 'success': [
                { 'request_range': { 'key': 'index/image/'+vol_name } },
                { 'request_range': { 'key': 'index/image/'+snap_vol_name } },
            ] })
            if len(resp['responses'][0]['kvs']) == 0:
                raise exception.VolumeBackendAPIException(data = 'Volume '+vol_name+' does not exist')
            if len(resp['responses'][1]['kvs']) > 0:
                if allow_existing:
                    snap_idx = resp['responses'][1]['kvs'][0]['value']
                    resp = self._etcd_txn({ 'success': [
                        { 'request_range': { 'key': 'config/inode/'+str(snap_idx['pool_id'])+'/'+str(snap_idx['id']) } },
                    ] })
                    if len(resp['responses'][0]['kvs']) == 0:
                        raise exception.VolumeBackendAPIException(data =
                            'Volume '+snap_vol_name+' is already indexed, but does not exist'
                        )
                    return resp['responses'][0]['kvs'][0]['value']
                raise exception.VolumeBackendAPIException(
                    data = 'Volume '+snap_vol_name+' already exists'
                )
            vol_idx = resp['responses'][0]['kvs'][0]['value']
            vol_idx_mod = resp['responses'][0]['kvs'][0]['mod_revision']
            # get image inode config and find a new ID
            resp = self._etcd_txn({ 'success': [
                { 'request_range': { 'key': 'config/inode/'+str(vol_idx['pool_id'])+'/'+str(vol_idx['id']) } },
                { 'request_range': { 'key': 'index/maxid/'+str(self.cfg['pool_id']) } },
            ] })
            if len(resp['responses'][0]['kvs']) == 0:
                raise exception.VolumeBackendAPIException(data = 'Volume '+vol_name+' does not exist')
            vol_cfg = resp['responses'][0]['kvs'][0]['value']
            vol_mod = resp['responses'][0]['kvs'][0]['mod_revision']
            new_id, id_mod = self._next_id(resp['responses'][1])
            # try to redirect image to the new inode
            new_cfg = {
                **vol_cfg, 'name': vol_name, 'parent_id': vol_idx['id'], 'parent_pool_id': vol_idx['pool_id']
            }
            resp = self._etcd_txn({ 'compare': [
                { 'target': 'MOD', 'mod_revision': vol_idx_mod, 'key': 'index/image/'+vol_name },
                { 'target': 'MOD', 'mod_revision': vol_mod, 'key': 'config/inode/'+str(vol_idx['pool_id'])+'/'+str(vol_idx['id']) },
                { 'target': 'MOD', 'mod_revision': id_mod, 'key': 'index/maxid/'+str(self.cfg['pool_id']) },
                { 'target': 'VERSION', 'version': 0, 'key': 'index/image/'+snap_vol_name },
                { 'target': 'VERSION', 'version': 0, 'key': 'config/inode/'+str(self.cfg['pool_id'])+'/'+str(new_id) },
            ], 'success': [
                { 'request_put': { 'key': 'index/maxid/'+str(self.cfg['pool_id']), 'value': new_id } },
                { 'request_put': { 'key': 'index/image/'+vol_name, 'value': json.dumps({
                    'id': new_id, 'pool_id': self.cfg['pool_id']
                }) } },
                { 'request_put': { 'key': 'config/inode/'+str(self.cfg['pool_id'])+'/'+str(new_id), 'value': json.dumps(new_cfg) } },
                { 'request_put': { 'key': 'index/image/'+snap_vol_name, 'value': json.dumps({
                    'id': vol_idx['id'], 'pool_id': vol_idx['pool_id']
                }) } },
                { 'request_put': { 'key': 'config/inode/'+str(vol_idx['pool_id'])+'/'+str(vol_idx['id']), 'value': json.dumps({
                    **vol_cfg, 'name': snap_vol_name, 'readonly': True
                }) } }
            ] })
            if resp.get('succeeded'):
                return new_cfg
    def initialize_connection(self, volume, connector):
        data = {
            'driver_volume_type': 'vitastor',
            'data': {
                'config_path': self.configuration.vitastor_config_path,
                'etcd_address': self.configuration.vitastor_etcd_address,
                'etcd_prefix': self.configuration.vitastor_etcd_prefix,
                'name': volume.name,
                'logical_block_size': '512',
                'physical_block_size': '4096',
            }
        }
        LOG.debug('connection data: %s', data)
        return data
    def terminate_connection(self, volume, connector, **kwargs):
        pass
    def clone_image(self, context, volume, image_location, image_meta, image_service):
        if image_location:
            # Note: image_location[0] is glance image direct_url.
            # image_location[1] contains the list of all locations (including
            # direct_url) or None if show_multiple_locations is False in
            # glance configuration.
            if image_location[1]:
                url_locations = [location['url'] for location in image_location[1]]
            else:
                url_locations = [image_location[0]]
            # iterate all locations to look for a cloneable one.
            for url_location in url_locations:
                if url_location and url_location.startswith('cinder://'):
                    # The idea is to use cinder://<volume-id> Glance volumes as base images
                    base_vol = self.db.volume_get(context, url_location[len('cinder://') : ])
                    if not base_vol or base_vol.volume_type_id != volume.volume_type_id:
                        continue
                    size = int(volume.size) * units.Gi
                    dest_name = utils.convert_str(volume.name)
                    # Find or create the base snapshot
                    snap_cfg = self._create_snapshot(base_vol.name, base_vol.name+'@.clone_snap', True)
                    # Then create a clone from it
                    new_cfg = self._create_image(dest_name, {
                        'size': size,
                        'parent_id': snap_cfg['parent_id'],
                        'parent_pool_id': snap_cfg['parent_pool_id'],
                    })
                    return ({}, True)
        return ({}, False)
    def copy_image_to_encrypted_volume(self, context, volume, image_service, image_id):
        self.copy_image_to_volume(context, volume, image_service, image_id, encrypted = True)
    def copy_image_to_volume(self, context, volume, image_service, image_id, encrypted = False):
        tmp_dir = volume_utils.image_conversion_dir()
        with tempfile.NamedTemporaryFile(dir = tmp_dir) as tmp:
            image_utils.fetch_to_raw(
                context, image_service, image_id, tmp.name,
                self.configuration.volume_dd_blocksize, size = volume.size
            )
            out_format = [ '-O', 'raw' ]
            if encrypted:
                key_file, opts = self._encrypt_opts(volume, context)
                out_format = [ '-O', 'luks', *opts ]
            dest_name = utils.convert_str(volume.name)
            self._try_execute(
                'qemu-img', 'convert', '-f', 'raw', tmp.name, *out_format,
                'vitastor:image='+dest_name.replace(':', '\\:')+self._qemu_args()
            )
            if encrypted:
                key_file.close()
    def copy_volume_to_image(self, context, volume, image_service, image_meta):
        tmp_dir = volume_utils.image_conversion_dir()
        tmp_file = os.path.join(tmp_dir, volume.name + '-' + image_meta['id'])
        with fileutils.remove_path_on_error(tmp_file):
            vol_name = utils.convert_str(volume.name)
            self._try_execute(
                'qemu-img', 'convert', '-f', 'raw',
                'vitastor:image='+vol_name.replace(':', '\\:')+self._qemu_args(),
                '-O', 'raw', tmp_file
            )
            # FIXME: Copy directly if the destination image is also in Vitastor
            volume_utils.upload_volume(context, image_service, image_meta, tmp_file, volume)
        os.unlink(tmp_file)
    def _get_image(self, vol_name):
        # find the image
        resp = self._etcd_txn({ 'success': [
            { 'request_range': { 'key': 'index/image/'+vol_name } },
        ] })
        if len(resp['responses'][0]['kvs']) == 0:
            return None
        vol_idx = resp['responses'][0]['kvs'][0]['value']
        vol_idx_mod = resp['responses'][0]['kvs'][0]['mod_revision']
        # get image inode config
        resp = self._etcd_txn({ 'success': [
            { 'request_range': { 'key': 'config/inode/'+str(vol_idx['pool_id'])+'/'+str(vol_idx['id']) } },
        ] })
        if len(resp['responses'][0]['kvs']) == 0:
            return None
        vol_cfg = resp['responses'][0]['kvs'][0]['value']
        vol_cfg_mod = resp['responses'][0]['kvs'][0]['mod_revision']
        return {
            'cfg': vol_cfg,
            'cfg_mod': vol_cfg_mod,
            'idx': vol_idx,
            'idx_mod': vol_idx_mod,
        }
    def extend_volume(self, volume, new_size):
        """Extend an existing volume."""
        vol_name = utils.convert_str(volume.name)
        while True:
            vol = self._get_image(vol_name)
            if not vol:
                raise exception.VolumeBackendAPIException(data = 'Volume '+vol_name+' does not exist')
            # change size
            size = int(new_size) * units.Gi
            if size == vol['cfg']['size']:
                break
            resp = self._etcd_txn({ 'compare': [ {
                'target': 'MOD',
                'mod_revision': vol['cfg_mod'],
                'key': 'config/inode/'+str(vol['idx']['pool_id'])+'/'+str(vol['idx']['id']),
            } ], 'success': [
                { 'request_put': {
                    'key': 'config/inode/'+str(vol['idx']['pool_id'])+'/'+str(vol['idx']['id']),
                    'value': json.dumps({ **vol['cfg'], 'size': size }),
                } },
            ] })
            if resp.get('succeeded'):
                break
        LOG.debug(
            "Extend volume from %(old_size)s GB to %(new_size)s GB.",
            {'old_size': volume.size, 'new_size': new_size}
        )
    def _add_manageable_volume(self, kv, manageable_volumes, cinder_ids):
        cfg = kv['value']
        if kv['key'].find('@') >= 0:
            # snapshot
            return
        image_id = volume_utils.extract_id_from_volume_name(cfg['name'])
        image_info = {
            'reference': {'source-name': image_name},
            'size': int(math.ceil(float(cfg['size']) / units.Gi)),
            'cinder_id': None,
            'extra_info': None,
        }
        if image_id in cinder_ids:
            image_info['cinder_id'] = image_id
            image_info['safe_to_manage'] = False
            image_info['reason_not_safe'] = 'already managed'
        else:
            image_info['safe_to_manage'] = True
            image_info['reason_not_safe'] = None
        manageable_volumes.append(image_info)
    def get_manageable_volumes(self, cinder_volumes, marker, limit, offset, sort_keys, sort_dirs):
        manageable_volumes = []
        cinder_ids = [resource['id'] for resource in cinder_volumes]
        # List all volumes
        # FIXME: It's possible to use pagination in our case, but.. do we want it?
        self._etcd_foreach('config/inode/'+str(self.cfg['pool_id']),
            lambda kv: self._add_manageable_volume(kv, manageable_volumes, cinder_ids))
        return volume_utils.paginate_entries_list(
            manageable_volumes, marker, limit, offset, sort_keys, sort_dirs)
    def _get_existing_name(existing_ref):
        if not isinstance(existing_ref, dict):
            existing_ref = {"source-name": existing_ref}
        if 'source-name' not in existing_ref:
            reason = _('Reference must contain source-name element.')
            raise exception.ManageExistingInvalidReference(existing_ref=existing_ref, reason=reason)
        src_name = utils.convert_str(existing_ref['source-name'])
        if not src_name:
            reason = _('Reference must contain source-name element.')
            raise exception.ManageExistingInvalidReference(existing_ref=existing_ref, reason=reason)
        return src_name
    def manage_existing_get_size(self, volume, existing_ref):
        """Return size of an existing image for manage_existing.
        :param volume: volume ref info to be set
        :param existing_ref: {'source-name': <image name>}
        """
        src_name = self._get_existing_name(existing_ref)
        vol = self._get_image(src_name)
        if not vol:
            raise exception.VolumeBackendAPIException(data = 'Volume '+src_name+' does not exist')
        return int(math.ceil(float(vol['cfg']['size']) / units.Gi))
    def manage_existing(self, volume, existing_ref):
        """Manages an existing image.
        Renames the image name to match the expected name for the volume.
        :param volume: volume ref info to be set
        :param existing_ref: {'source-name': <image name>}
        """
        from_name = self._get_existing_name(existing_ref)
        to_name = utils.convert_str(volume.name)
        self._rename(from_name, to_name)
    def _rename(self, from_name, to_name):
        while True:
            vol = self._get_image(from_name)
            if not vol:
                raise exception.VolumeBackendAPIException(data = 'Volume '+from_name+' does not exist')
            to = self._get_image(to_name)
            if to:
                raise exception.VolumeBackendAPIException(data = 'Volume '+to_name+' already exists')
            resp = self._etcd_txn({ 'compare': [
                { 'target': 'MOD', 'mod_revision': vol['idx_mod'], 'key': 'index/image/'+vol['cfg']['name'] },
                { 'target': 'MOD', 'mod_revision': vol['cfg_mod'], 'key': 'config/inode/'+str(vol['idx']['pool_id'])+'/'+str(vol['idx']['id']) },
                { 'target': 'VERSION', 'version': 0, 'key': 'index/image/'+to_name },
            ], 'success': [
                { 'request_delete_range': { 'key': 'index/image/'+vol['cfg']['name'] } },
                { 'request_put': { 'key': 'index/image/'+to_name, 'value': json.dumps(vol['idx']) } },
                { 'request_put': { 'key': 'config/inode/'+str(vol['idx']['pool_id'])+'/'+str(vol['idx']['id']),
                    'value': json.dumps({ **vol['cfg'], 'name': to_name }) } },
            ] })
            if resp.get('succeeded'):
                break
    def unmanage(self, volume):
        pass
    def _add_manageable_snapshot(self, kv, manageable_snapshots, cinder_ids):
        cfg = kv['value']
        dog = kv['key'].find('@')
        if dog < 0:
            # snapshot
            return
        image_name = kv['key'][0 : dog]
        snap_name = kv['key'][dog+1 : ]
        snapshot_id = volume_utils.extract_id_from_snapshot_name(snap_name)
        snapshot_info = {
            'reference': {'source-name': snap_name},
            'size': int(math.ceil(float(cfg['size']) / units.Gi)),
            'cinder_id': None,
            'extra_info': None,
            'safe_to_manage': False,
            'reason_not_safe': None,
            'source_reference': {'source-name': image_name}
        }
        if snapshot_id in cinder_ids:
            # Exclude snapshots already managed.
            snapshot_info['reason_not_safe'] = ('already managed')
            snapshot_info['cinder_id'] = snapshot_id
        elif snap_name.endswith('.clone_snap'):
            # Exclude clone snapshot.
            snapshot_info['reason_not_safe'] = ('used for clone snap')
        else:
            snapshot_info['safe_to_manage'] = True
        manageable_snapshots.append(snapshot_info)
    def get_manageable_snapshots(self, cinder_snapshots, marker, limit, offset, sort_keys, sort_dirs):
        """List manageable snapshots in Vitastor."""
        manageable_snapshots = []
        cinder_snapshot_ids = [resource['id'] for resource in cinder_snapshots]
        # List all volumes
        # FIXME: It's possible to use pagination in our case, but.. do we want it?
        self._etcd_foreach('config/inode/'+str(self.cfg['pool_id']),
            lambda kv: self._add_manageable_volume(kv, manageable_snapshots, cinder_snapshot_ids))
        return volume_utils.paginate_entries_list(
            manageable_snapshots, marker, limit, offset, sort_keys, sort_dirs)
    def manage_existing_snapshot_get_size(self, snapshot, existing_ref):
        """Return size of an existing image for manage_existing.
        :param snapshot: snapshot ref info to be set
        :param existing_ref: {'source-name': <name of snapshot>}
        """
        vol_name = utils.convert_str(snapshot.volume_name)
        snap_name = self._get_existing_name(existing_ref)
        vol = self._get_image(vol_name+'@'+snap_name)
        if not vol:
            raise exception.ManageExistingInvalidReference(
                existing_ref=snapshot_name, reason='Specified snapshot does not exist.'
            )
        return int(math.ceil(float(vol['cfg']['size']) / units.Gi))
    def manage_existing_snapshot(self, snapshot, existing_ref):
        """Manages an existing snapshot.
        Renames the snapshot name to match the expected name for the snapshot.
        Error checking done by manage_existing_get_size is not repeated.
        :param snapshot: snapshot ref info to be set
        :param existing_ref: {'source-name': <name of snapshot>}
        """
        vol_name = utils.convert_str(snapshot.volume_name)
        snap_name = self._get_existing_name(existing_ref)
        from_name = vol_name+'@'+snap_name
        to_name = vol_name+'@'+utils.convert_str(snapshot.name)
        self._rename(from_name, to_name)
    def unmanage_snapshot(self, snapshot):
        """Removes the specified snapshot from Cinder management."""
        pass
    def _dumps(self, obj):
        return json.dumps(obj, separators=(',', ':'), sort_keys=True)
--- a/patches/devstack-local.conf
+++ b/patches/devstack-local.conf
@ -1,23 +0,0 @@
 # Devstack configuration for bridged networking
 [[local|localrc]]
 ADMIN_PASSWORD=secret
 DATABASE_PASSWORD=$ADMIN_PASSWORD
 RABBIT_PASSWORD=$ADMIN_PASSWORD
 SERVICE_PASSWORD=$ADMIN_PASSWORD
 HOST_IP=10.0.2.15
 Q_USE_SECGROUP=True
 FLOATING_RANGE="10.0.2.0/24"
 IPV4_ADDRS_SAFE_TO_USE="10.0.5.0/24"
 Q_FLOATING_ALLOCATION_POOL=start=10.0.2.50,end=10.0.2.100
 PUBLIC_NETWORK_GATEWAY=10.0.2.2
 PUBLIC_INTERFACE=ens3
 Q_USE_PROVIDERNET_FOR_PUBLIC=True
 Q_AGENT=linuxbridge
 Q_ML2_PLUGIN_MECHANISM_DRIVERS=linuxbridge
 LB_PHYSICAL_INTERFACE=ens3
 PUBLIC_PHYSICAL_NETWORK=default
 LB_INTERFACE_MAPPINGS=default:ens3
 Q_SERVICE_PLUGIN_CLASSES=
 Q_ML2_PLUGIN_TYPE_DRIVERS=flat
 Q_ML2_PLUGIN_EXT_DRIVERS=
--- a/patches/libvirt-7.6-vitastor.diff
+++ b/patches/libvirt-7.6-vitastor.diff
@ -1,692 +0,0 @@
 commit c97d7f2bfb7798f0d68bdba2646245dcfb940efa
 Author: Vitaliy Filippov <vitalif@yourcmc.ru>
 Date:   Mon Jun 28 01:20:19 2021 +0300
    Add Vitastor support
 Index: libvirt-7.6.0/docs/schemas/domaincommon.rng
 ===================================================================
 --- libvirt-7.6.0.orig/docs/schemas/domaincommon.rng
 +++ libvirt-7.6.0/docs/schemas/domaincommon.rng
@@ -1877,6 +1877,35 @@
     </element>
   </define>
 +  <define name="diskSourceNetworkProtocolVitastor">
 +    <element name="source">
 +      <interleave>
 +        <attribute name="protocol">
 +          <value>vitastor</value>
 +        </attribute>
 +        <ref name="diskSourceCommon"/>
 +        <optional>
 +          <attribute name="name"/>
 +        </optional>
 +        <optional>
 +          <attribute name="query"/>
 +        </optional>
 +        <zeroOrMore>
 +          <ref name="diskSourceNetworkHost"/>
 +        </zeroOrMore>
 +        <optional>
 +          <element name="config">
 +            <attribute name="file">
 +              <ref name="absFilePath"/>
 +            </attribute>
 +            <empty/>
 +          </element>
 +        </optional>
 +        <empty/>
 +      </interleave>
 +    </element>
 +  </define>
 +
   <define name="diskSourceNetworkProtocolISCSI">
     <element name="source">
       <attribute name="protocol">
@@ -2133,6 +2162,7 @@
       <ref name="diskSourceNetworkProtocolSimple"/>
       <ref name="diskSourceNetworkProtocolVxHS"/>
       <ref name="diskSourceNetworkProtocolNFS"/>
 +      <ref name="diskSourceNetworkProtocolVitastor"/>
     </choice>
   </define>
 Index: libvirt-7.6.0/include/libvirt/libvirt-storage.h
 ===================================================================
 --- libvirt-7.6.0.orig/include/libvirt/libvirt-storage.h
 +++ libvirt-7.6.0/include/libvirt/libvirt-storage.h
@@ -245,6 +245,7 @@ typedef enum {
     VIR_CONNECT_LIST_STORAGE_POOLS_ZFS           = 1 << 17,
     VIR_CONNECT_LIST_STORAGE_POOLS_VSTORAGE      = 1 << 18,
     VIR_CONNECT_LIST_STORAGE_POOLS_ISCSI_DIRECT  = 1 << 19,
 +    VIR_CONNECT_LIST_STORAGE_POOLS_VITASTOR      = 1 << 20,
 } virConnectListAllStoragePoolsFlags;
 int                     virConnectListAllStoragePools(virConnectPtr conn,
 Index: libvirt-7.6.0/src/conf/domain_conf.c
 ===================================================================
 --- libvirt-7.6.0.orig/src/conf/domain_conf.c
 +++ libvirt-7.6.0/src/conf/domain_conf.c
@@ -8268,7 +8268,8 @@ virDomainDiskSourceNetworkParse(xmlNodeP
     src->configFile = virXPathString("string(./config/@file)", ctxt);
     if (src->protocol == VIR_STORAGE_NET_PROTOCOL_HTTP ||
 -        src->protocol == VIR_STORAGE_NET_PROTOCOL_HTTPS)
 +        src->protocol == VIR_STORAGE_NET_PROTOCOL_HTTPS ||
 +        src->protocol == VIR_STORAGE_NET_PROTOCOL_VITASTOR)
         src->query = virXMLPropString(node, "query");
     if (virDomainStorageNetworkParseHosts(node, ctxt, &src->hosts, &src->nhosts) < 0)
@@ -30831,6 +30832,7 @@ virDomainStorageSourceTranslateSourcePoo
     case VIR_STORAGE_POOL_MPATH:
     case VIR_STORAGE_POOL_RBD:
 +    case VIR_STORAGE_POOL_VITASTOR:
     case VIR_STORAGE_POOL_SHEEPDOG:
     case VIR_STORAGE_POOL_GLUSTER:
     case VIR_STORAGE_POOL_LAST:
 Index: libvirt-7.6.0/src/conf/domain_validate.c
 ===================================================================
 --- libvirt-7.6.0.orig/src/conf/domain_validate.c
 +++ libvirt-7.6.0/src/conf/domain_validate.c
@@ -470,7 +470,7 @@ virDomainDiskDefValidateSourceChainOne(c
         }
     }
 -    /* internal snapshots and config files are currently supported only with rbd: */
 +    /* internal snapshots are currently supported only with rbd: */
     if (virStorageSourceGetActualType(src) != VIR_STORAGE_TYPE_NETWORK &&
         src->protocol != VIR_STORAGE_NET_PROTOCOL_RBD) {
         if (src->snapshot) {
@@ -479,11 +479,15 @@ virDomainDiskDefValidateSourceChainOne(c
                              "only with 'rbd' disks"));
             return -1;
         }
 -
 +    }
 +    /* config files are currently supported only with rbd and vitastor: */
 +    if (virStorageSourceGetActualType(src) != VIR_STORAGE_TYPE_NETWORK &&
 +        src->protocol != VIR_STORAGE_NET_PROTOCOL_RBD &&
 +        src->protocol != VIR_STORAGE_NET_PROTOCOL_VITASTOR) {
         if (src->configFile) {
             virReportError(VIR_ERR_XML_ERROR, "%s",
                            _("<config> element is currently supported "
 -                             "only with 'rbd' disks"));
 +                             "only with 'rbd' and 'vitastor' disks"));
             return -1;
         }
     }
 Index: libvirt-7.6.0/src/conf/storage_conf.c
 ===================================================================
 --- libvirt-7.6.0.orig/src/conf/storage_conf.c
 +++ libvirt-7.6.0/src/conf/storage_conf.c
@@ -60,7 +60,7 @@ VIR_ENUM_IMPL(virStoragePool,
               "logical", "disk", "iscsi",
               "iscsi-direct", "scsi", "mpath",
               "rbd", "sheepdog", "gluster",
 -              "zfs", "vstorage",
 +              "zfs", "vstorage", "vitastor",
 );
 VIR_ENUM_IMPL(virStoragePoolFormatFileSystem,
@@ -246,6 +246,18 @@ static virStoragePoolTypeInfo poolTypeIn
           .formatToString = virStorageFileFormatTypeToString,
       }
     },
 +    {.poolType = VIR_STORAGE_POOL_VITASTOR,
 +     .poolOptions = {
 +         .flags = (VIR_STORAGE_POOL_SOURCE_HOST |
 +                   VIR_STORAGE_POOL_SOURCE_NETWORK |
 +                   VIR_STORAGE_POOL_SOURCE_NAME),
 +      },
 +      .volOptions = {
 +          .defaultFormat = VIR_STORAGE_FILE_RAW,
 +          .formatFromString = virStorageVolumeFormatFromString,
 +          .formatToString = virStorageFileFormatTypeToString,
 +      }
 +    },
     {.poolType = VIR_STORAGE_POOL_SHEEPDOG,
      .poolOptions = {
          .flags = (VIR_STORAGE_POOL_SOURCE_HOST |
@@ -546,6 +558,11 @@ virStoragePoolDefParseSource(xmlXPathCon
                        _("element 'name' is mandatory for RBD pool"));
         return -1;
     }
 +    if (pool_type == VIR_STORAGE_POOL_VITASTOR && source->name == NULL) {
 +        virReportError(VIR_ERR_XML_ERROR, "%s",
 +                       _("element 'name' is mandatory for Vitastor pool"));
 +        return -1;
 +    }
     if (options->formatFromString) {
         g_autofree char *format = NULL;
@@ -1182,6 +1199,7 @@ virStoragePoolDefFormatBuf(virBuffer *bu
     /* RBD, Sheepdog, Gluster and Iscsi-direct devices are not local block devs nor
      * files, so they don't have a target */
     if (def->type != VIR_STORAGE_POOL_RBD &&
 +        def->type != VIR_STORAGE_POOL_VITASTOR &&
         def->type != VIR_STORAGE_POOL_SHEEPDOG &&
         def->type != VIR_STORAGE_POOL_GLUSTER &&
         def->type != VIR_STORAGE_POOL_ISCSI_DIRECT) {
 Index: libvirt-7.6.0/src/conf/storage_conf.h
 ===================================================================
 --- libvirt-7.6.0.orig/src/conf/storage_conf.h
 +++ libvirt-7.6.0/src/conf/storage_conf.h
@@ -106,6 +106,7 @@ typedef enum {
     VIR_STORAGE_POOL_GLUSTER,  /* Gluster device */
     VIR_STORAGE_POOL_ZFS,      /* ZFS */
     VIR_STORAGE_POOL_VSTORAGE, /* Virtuozzo Storage */
 +    VIR_STORAGE_POOL_VITASTOR, /* Vitastor */
     VIR_STORAGE_POOL_LAST,
 } virStoragePoolType;
@@ -465,6 +466,7 @@ VIR_ENUM_DECL(virStoragePartedFs);
                  VIR_CONNECT_LIST_STORAGE_POOLS_SCSI     | \
                  VIR_CONNECT_LIST_STORAGE_POOLS_MPATH    | \
                  VIR_CONNECT_LIST_STORAGE_POOLS_RBD      | \
 +                 VIR_CONNECT_LIST_STORAGE_POOLS_VITASTOR | \
                  VIR_CONNECT_LIST_STORAGE_POOLS_SHEEPDOG | \
                  VIR_CONNECT_LIST_STORAGE_POOLS_GLUSTER  | \
                  VIR_CONNECT_LIST_STORAGE_POOLS_ZFS      | \
 Index: libvirt-7.6.0/src/conf/storage_source_conf.c
 ===================================================================
 --- libvirt-7.6.0.orig/src/conf/storage_source_conf.c
 +++ libvirt-7.6.0/src/conf/storage_source_conf.c
@@ -85,6 +85,7 @@ VIR_ENUM_IMPL(virStorageNetProtocol,
               "ssh",
               "vxhs",
               "nfs",
 +              "vitastor",
 );
@@ -1262,6 +1263,7 @@ virStorageSourceNetworkDefaultPort(virSt
         case VIR_STORAGE_NET_PROTOCOL_GLUSTER:
             return 24007;
 +        case VIR_STORAGE_NET_PROTOCOL_VITASTOR:
         case VIR_STORAGE_NET_PROTOCOL_RBD:
             /* we don't provide a default for RBD */
             return 0;
 Index: libvirt-7.6.0/src/conf/storage_source_conf.h
 ===================================================================
 --- libvirt-7.6.0.orig/src/conf/storage_source_conf.h
 +++ libvirt-7.6.0/src/conf/storage_source_conf.h
@@ -127,6 +127,7 @@ typedef enum {
     VIR_STORAGE_NET_PROTOCOL_SSH,
     VIR_STORAGE_NET_PROTOCOL_VXHS,
     VIR_STORAGE_NET_PROTOCOL_NFS,
 +    VIR_STORAGE_NET_PROTOCOL_VITASTOR,
     VIR_STORAGE_NET_PROTOCOL_LAST
 } virStorageNetProtocol;
 Index: libvirt-7.6.0/src/conf/virstorageobj.c
 ===================================================================
 --- libvirt-7.6.0.orig/src/conf/virstorageobj.c
 +++ libvirt-7.6.0/src/conf/virstorageobj.c
@@ -1481,6 +1481,7 @@ virStoragePoolObjSourceFindDuplicateCb(c
             return 1;
         break;
 +    case VIR_STORAGE_POOL_VITASTOR:
     case VIR_STORAGE_POOL_RBD:
     case VIR_STORAGE_POOL_LAST:
         break;
@@ -1980,6 +1981,8 @@ virStoragePoolObjMatch(virStoragePoolObj
                (obj->def->type == VIR_STORAGE_POOL_MPATH))   ||
               (MATCH(VIR_CONNECT_LIST_STORAGE_POOLS_RBD) &&
                (obj->def->type == VIR_STORAGE_POOL_RBD))     ||
 +              (MATCH(VIR_CONNECT_LIST_STORAGE_POOLS_VITASTOR) &&
 +               (obj->def->type == VIR_STORAGE_POOL_VITASTOR)) ||
               (MATCH(VIR_CONNECT_LIST_STORAGE_POOLS_SHEEPDOG) &&
                (obj->def->type == VIR_STORAGE_POOL_SHEEPDOG)) ||
               (MATCH(VIR_CONNECT_LIST_STORAGE_POOLS_GLUSTER) &&
 Index: libvirt-7.6.0/src/libvirt-storage.c
 ===================================================================
 --- libvirt-7.6.0.orig/src/libvirt-storage.c
 +++ libvirt-7.6.0/src/libvirt-storage.c
@@ -92,6 +92,7 @@ virStoragePoolGetConnect(virStoragePoolP
  * VIR_CONNECT_LIST_STORAGE_POOLS_SCSI
  * VIR_CONNECT_LIST_STORAGE_POOLS_MPATH
  * VIR_CONNECT_LIST_STORAGE_POOLS_RBD
 + * VIR_CONNECT_LIST_STORAGE_POOLS_VITASTOR
  * VIR_CONNECT_LIST_STORAGE_POOLS_SHEEPDOG
  * VIR_CONNECT_LIST_STORAGE_POOLS_GLUSTER
  * VIR_CONNECT_LIST_STORAGE_POOLS_ZFS
 Index: libvirt-7.6.0/src/libxl/libxl_conf.c
 ===================================================================
 --- libvirt-7.6.0.orig/src/libxl/libxl_conf.c
 +++ libvirt-7.6.0/src/libxl/libxl_conf.c
@@ -972,6 +972,7 @@ libxlMakeNetworkDiskSrcStr(virStorageSou
     case VIR_STORAGE_NET_PROTOCOL_SSH:
     case VIR_STORAGE_NET_PROTOCOL_VXHS:
     case VIR_STORAGE_NET_PROTOCOL_NFS:
 +    case VIR_STORAGE_NET_PROTOCOL_VITASTOR:
     case VIR_STORAGE_NET_PROTOCOL_LAST:
     case VIR_STORAGE_NET_PROTOCOL_NONE:
         virReportError(VIR_ERR_NO_SUPPORT,
 Index: libvirt-7.6.0/src/libxl/xen_xl.c
 ===================================================================
 --- libvirt-7.6.0.orig/src/libxl/xen_xl.c
 +++ libvirt-7.6.0/src/libxl/xen_xl.c
@@ -1540,6 +1540,7 @@ xenFormatXLDiskSrcNet(virStorageSource *
     case VIR_STORAGE_NET_PROTOCOL_SSH:
     case VIR_STORAGE_NET_PROTOCOL_VXHS:
     case VIR_STORAGE_NET_PROTOCOL_NFS:
 +    case VIR_STORAGE_NET_PROTOCOL_VITASTOR:
     case VIR_STORAGE_NET_PROTOCOL_LAST:
     case VIR_STORAGE_NET_PROTOCOL_NONE:
         virReportError(VIR_ERR_NO_SUPPORT,
 Index: libvirt-7.6.0/src/qemu/qemu_block.c
 ===================================================================
 --- libvirt-7.6.0.orig/src/qemu/qemu_block.c
 +++ libvirt-7.6.0/src/qemu/qemu_block.c
@@ -916,6 +916,38 @@ qemuBlockStorageSourceGetRBDProps(virSto
 static virJSONValue *
 +qemuBlockStorageSourceGetVitastorProps(virStorageSource *src)
 +{
 +    virJSONValue *ret = NULL;
 +    virStorageNetHostDef *host;
 +    size_t i;
 +    g_auto(virBuffer) buf = VIR_BUFFER_INITIALIZER;
 +    g_autofree char *etcd = NULL;
 +
 +    for (i = 0; i < src->nhosts; i++) {
 +        host = src->hosts + i;
 +        if ((virStorageNetHostTransport)host->transport != VIR_STORAGE_NET_HOST_TRANS_TCP) {
 +            return NULL;
 +        }
 +        virBufferAsprintf(&buf, i > 0 ? ",%s:%u" : "%s:%u", host->name, host->port);
 +    }
 +    if (src->nhosts > 0) {
 +        etcd = virBufferContentAndReset(&buf);
 +    }
 +
 +    if (virJSONValueObjectCreate(&ret,
 +                                 "S:etcd-host", etcd,
 +                                 "S:etcd-prefix", src->query,
 +                                 "S:config-path", src->configFile,
 +                                 "s:image", src->path,
 +                                 NULL) < 0)
 +        return NULL;
 +
 +    return ret;
 +}
 +
 +
 +static virJSONValue *
 qemuBlockStorageSourceGetSheepdogProps(virStorageSource *src)
 {
     g_autoptr(virJSONValue) serverprops = NULL;
@@ -1205,6 +1237,12 @@ qemuBlockStorageSourceGetBackendProps(vi
                 return NULL;
             break;
 +        case VIR_STORAGE_NET_PROTOCOL_VITASTOR:
 +            driver = "vitastor";
 +            if (!(fileprops = qemuBlockStorageSourceGetVitastorProps(src)))
 +                return NULL;
 +            break;
 +
         case VIR_STORAGE_NET_PROTOCOL_SHEEPDOG:
             driver = "sheepdog";
             if (!(fileprops = qemuBlockStorageSourceGetSheepdogProps(src)))
@@ -2219,6 +2257,7 @@ qemuBlockGetBackingStoreString(virStorag
             case VIR_STORAGE_NET_PROTOCOL_SHEEPDOG:
             case VIR_STORAGE_NET_PROTOCOL_RBD:
 +            case VIR_STORAGE_NET_PROTOCOL_VITASTOR:
             case VIR_STORAGE_NET_PROTOCOL_VXHS:
             case VIR_STORAGE_NET_PROTOCOL_NFS:
             case VIR_STORAGE_NET_PROTOCOL_SSH:
@@ -2596,6 +2635,12 @@ qemuBlockStorageSourceCreateGetStoragePr
                 return -1;
             break;
 +        case VIR_STORAGE_NET_PROTOCOL_VITASTOR:
 +            driver = "vitastor";
 +            if (!(location = qemuBlockStorageSourceGetVitastorProps(src)))
 +                return -1;
 +            break;
 +
         case VIR_STORAGE_NET_PROTOCOL_SHEEPDOG:
             driver = "sheepdog";
             if (!(location = qemuBlockStorageSourceGetSheepdogProps(src)))
 Index: libvirt-7.6.0/src/qemu/qemu_command.c
 ===================================================================
 --- libvirt-7.6.0.orig/src/qemu/qemu_command.c
 +++ libvirt-7.6.0/src/qemu/qemu_command.c
@@ -1074,6 +1074,43 @@ qemuBuildNetworkDriveStr(virStorageSourc
             ret = virBufferContentAndReset(&buf);
             break;
 +        case VIR_STORAGE_NET_PROTOCOL_VITASTOR:
 +            if (strchr(src->path, ':')) {
 +                virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
 +                               _("':' not allowed in Vitastor source volume name '%s'"),
 +                               src->path);
 +                return NULL;
 +            }
 +
 +            virBufferStrcat(&buf, "vitastor:image=", src->path, NULL);
 +
 +            if (src->nhosts > 0) {
 +                virBufferAddLit(&buf, ":etcd-host=");
 +                for (i = 0; i < src->nhosts; i++) {
 +                    if (i)
 +                        virBufferAddLit(&buf, ",");
 +
 +                    /* assume host containing : is ipv6 */
 +                    if (strchr(src->hosts[i].name, ':'))
 +                        virBufferEscape(&buf, '\\', ":", "[%s]",
 +                                        src->hosts[i].name);
 +                    else
 +                        virBufferAsprintf(&buf, "%s", src->hosts[i].name);
 +
 +                    if (src->hosts[i].port)
 +                        virBufferAsprintf(&buf, "\\:%u", src->hosts[i].port);
 +                }
 +            }
 +
 +            if (src->configFile)
 +                virBufferEscape(&buf, '\\', ":", ":config-path=%s", src->configFile);
 +
 +            if (src->query)
 +                virBufferEscape(&buf, '\\', ":", ":etcd-prefix=%s", src->query);
 +
 +            ret = virBufferContentAndReset(&buf);
 +            break;
 +
         case VIR_STORAGE_NET_PROTOCOL_VXHS:
             virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
                            _("VxHS protocol does not support URI syntax"));
 Index: libvirt-7.6.0/src/qemu/qemu_domain.c
 ===================================================================
 --- libvirt-7.6.0.orig/src/qemu/qemu_domain.c
 +++ libvirt-7.6.0/src/qemu/qemu_domain.c
@@ -4900,7 +4900,8 @@ qemuDomainValidateStorageSource(virStora
     if (src->query &&
         (actualType != VIR_STORAGE_TYPE_NETWORK ||
          (src->protocol != VIR_STORAGE_NET_PROTOCOL_HTTPS &&
 -          src->protocol != VIR_STORAGE_NET_PROTOCOL_HTTP))) {
 +          src->protocol != VIR_STORAGE_NET_PROTOCOL_HTTP &&
 +          src->protocol != VIR_STORAGE_NET_PROTOCOL_VITASTOR))) {
         virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
                        _("query is supported only with HTTP(S) protocols"));
         return -1;
@@ -10102,6 +10103,7 @@ qemuDomainPrepareStorageSourceTLS(virSto
         break;
     case VIR_STORAGE_NET_PROTOCOL_RBD:
 +    case VIR_STORAGE_NET_PROTOCOL_VITASTOR:
     case VIR_STORAGE_NET_PROTOCOL_SHEEPDOG:
     case VIR_STORAGE_NET_PROTOCOL_GLUSTER:
     case VIR_STORAGE_NET_PROTOCOL_ISCSI:
 Index: libvirt-7.6.0/src/qemu/qemu_snapshot.c
 ===================================================================
 --- libvirt-7.6.0.orig/src/qemu/qemu_snapshot.c
 +++ libvirt-7.6.0/src/qemu/qemu_snapshot.c
@@ -402,6 +402,7 @@ qemuSnapshotPrepareDiskExternalInactive(
         case VIR_STORAGE_NET_PROTOCOL_NONE:
         case VIR_STORAGE_NET_PROTOCOL_NBD:
         case VIR_STORAGE_NET_PROTOCOL_RBD:
 +        case VIR_STORAGE_NET_PROTOCOL_VITASTOR:
         case VIR_STORAGE_NET_PROTOCOL_SHEEPDOG:
         case VIR_STORAGE_NET_PROTOCOL_GLUSTER:
         case VIR_STORAGE_NET_PROTOCOL_ISCSI:
@@ -494,6 +495,7 @@ qemuSnapshotPrepareDiskExternalActive(vi
         case VIR_STORAGE_NET_PROTOCOL_NONE:
         case VIR_STORAGE_NET_PROTOCOL_NBD:
         case VIR_STORAGE_NET_PROTOCOL_RBD:
 +        case VIR_STORAGE_NET_PROTOCOL_VITASTOR:
         case VIR_STORAGE_NET_PROTOCOL_SHEEPDOG:
         case VIR_STORAGE_NET_PROTOCOL_ISCSI:
         case VIR_STORAGE_NET_PROTOCOL_HTTP:
@@ -647,6 +649,7 @@ qemuSnapshotPrepareDiskInternal(virDomai
         case VIR_STORAGE_NET_PROTOCOL_NONE:
         case VIR_STORAGE_NET_PROTOCOL_NBD:
         case VIR_STORAGE_NET_PROTOCOL_RBD:
 +        case VIR_STORAGE_NET_PROTOCOL_VITASTOR:
         case VIR_STORAGE_NET_PROTOCOL_SHEEPDOG:
         case VIR_STORAGE_NET_PROTOCOL_GLUSTER:
         case VIR_STORAGE_NET_PROTOCOL_ISCSI:
 Index: libvirt-7.6.0/src/storage/storage_driver.c
 ===================================================================
 --- libvirt-7.6.0.orig/src/storage/storage_driver.c
 +++ libvirt-7.6.0/src/storage/storage_driver.c
@@ -1644,6 +1644,7 @@ storageVolLookupByPathCallback(virStorag
         case VIR_STORAGE_POOL_GLUSTER:
         case VIR_STORAGE_POOL_RBD:
 +        case VIR_STORAGE_POOL_VITASTOR:
         case VIR_STORAGE_POOL_SHEEPDOG:
         case VIR_STORAGE_POOL_ZFS:
         case VIR_STORAGE_POOL_LAST:
 Index: libvirt-7.6.0/src/storage_file/storage_source_backingstore.c
 ===================================================================
 --- libvirt-7.6.0.orig/src/storage_file/storage_source_backingstore.c
 +++ libvirt-7.6.0/src/storage_file/storage_source_backingstore.c
@@ -285,6 +285,75 @@ virStorageSourceParseRBDColonString(cons
 static int
 +virStorageSourceParseVitastorColonString(const char *colonstr,
 +                                         virStorageSource *src)
 +{
 +    char *p, *e, *next;
 +    g_autofree char *options = NULL;
 +
 +    /* optionally skip the "vitastor:" prefix if provided */
 +    if (STRPREFIX(colonstr, "vitastor:"))
 +        colonstr += strlen("vitastor:");
 +
 +    options = g_strdup(colonstr);
 +
 +    p = options;
 +    while (*p) {
 +        /* find : delimiter or end of string */
 +        for (e = p; *e && *e != ':'; ++e) {
 +            if (*e == '\\') {
 +                e++;
 +                if (*e == '\0')
 +                    break;
 +            }
 +        }
 +        if (*e == '\0') {
 +            next = e;    /* last kv pair */
 +        } else {
 +            next = e + 1;
 +            *e = '\0';
 +        }
 +
 +        if (STRPREFIX(p, "image=")) {
 +            src->path = g_strdup(p + strlen("image="));
 +        } else if (STRPREFIX(p, "etcd-prefix=")) {
 +            src->query = g_strdup(p + strlen("etcd-prefix="));
 +        } else if (STRPREFIX(p, "config-path=")) {
 +            src->configFile = g_strdup(p + strlen("config-path="));
 +        } else if (STRPREFIX(p, "etcd-host=")) {
 +            char *h, *sep;
 +
 +            h = p + strlen("etcd-host=");
 +            while (h < e) {
 +                for (sep = h; sep < e; ++sep) {
 +                    if (*sep == '\\' && (sep[1] == ',' ||
 +                                         sep[1] == ';' ||
 +                                         sep[1] == ' ')) {
 +                        *sep = '\0';
 +                        sep += 2;
 +                        break;
 +                    }
 +                }
 +
 +                if (virStorageSourceRBDAddHost(src, h) < 0)
 +                    return -1;
 +
 +                h = sep;
 +            }
 +        }
 +
 +        p = next;
 +    }
 +
 +    if (!src->path) {
 +        return -1;
 +    }
 +
 +    return 0;
 +}
 +
 +
 +static int
 virStorageSourceParseNBDColonString(const char *nbdstr,
                                     virStorageSource *src)
 {
@@ -396,6 +465,11 @@ virStorageSourceParseBackingColon(virSto
             return -1;
         break;
 +    case VIR_STORAGE_NET_PROTOCOL_VITASTOR:
 +        if (virStorageSourceParseVitastorColonString(path, src) < 0)
 +            return -1;
 +        break;
 +
     case VIR_STORAGE_NET_PROTOCOL_SHEEPDOG:
     case VIR_STORAGE_NET_PROTOCOL_LAST:
     case VIR_STORAGE_NET_PROTOCOL_NONE:
@@ -985,6 +1059,54 @@ virStorageSourceParseBackingJSONRBD(virS
 }
 static int
 +virStorageSourceParseBackingJSONVitastor(virStorageSource *src,
 +                                         virJSONValue *json,
 +                                         const char *jsonstr G_GNUC_UNUSED,
 +                                         int opaque G_GNUC_UNUSED)
 +{
 +    const char *filename;
 +    const char *image = virJSONValueObjectGetString(json, "image");
 +    const char *conf = virJSONValueObjectGetString(json, "config-path");
 +    const char *etcd_prefix = virJSONValueObjectGetString(json, "etcd-prefix");
 +    virJSONValue *servers = virJSONValueObjectGetArray(json, "server");
 +    size_t nservers;
 +    size_t i;
 +
 +    src->type = VIR_STORAGE_TYPE_NETWORK;
 +    src->protocol = VIR_STORAGE_NET_PROTOCOL_VITASTOR;
 +
 +    /* legacy syntax passed via 'filename' option */
 +    if ((filename = virJSONValueObjectGetString(json, "filename")))
 +        return virStorageSourceParseVitastorColonString(filename, src);
 +
 +    if (!image) {
 +        virReportError(VIR_ERR_INVALID_ARG, "%s",
 +                       _("missing image name in Vitastor backing volume "
 +                         "JSON specification"));
 +        return -1;
 +    }
 +
 +    src->path = g_strdup(image);
 +    src->configFile = g_strdup(conf);
 +    src->query = g_strdup(etcd_prefix);
 +
 +    if (servers) {
 +        nservers = virJSONValueArraySize(servers);
 +
 +        src->hosts = g_new0(virStorageNetHostDef, nservers);
 +        src->nhosts = nservers;
 +
 +        for (i = 0; i < nservers; i++) {
 +            if (virStorageSourceParseBackingJSONInetSocketAddress(src->hosts + i,
 +                                                                  virJSONValueArrayGet(servers, i)) < 0)
 +                return -1;
 +        }
 +    }
 +
 +    return 0;
 +}
 +
 +static int
 virStorageSourceParseBackingJSONRaw(virStorageSource *src,
                                     virJSONValue *json,
                                     const char *jsonstr,
@@ -1162,6 +1284,7 @@ static const struct virStorageSourceJSON
     {"sheepdog", false, virStorageSourceParseBackingJSONSheepdog, 0},
     {"ssh", false, virStorageSourceParseBackingJSONSSH, 0},
     {"rbd", false, virStorageSourceParseBackingJSONRBD, 0},
 +    {"vitastor", false, virStorageSourceParseBackingJSONVitastor, 0},
     {"raw", true, virStorageSourceParseBackingJSONRaw, 0},
     {"nfs", false, virStorageSourceParseBackingJSONNFS, 0},
     {"vxhs", false, virStorageSourceParseBackingJSONVxHS, 0},
 Index: libvirt-7.6.0/src/test/test_driver.c
 ===================================================================
 --- libvirt-7.6.0.orig/src/test/test_driver.c
 +++ libvirt-7.6.0/src/test/test_driver.c
@@ -7193,6 +7193,7 @@ testStorageVolumeTypeForPool(int pooltyp
     case VIR_STORAGE_POOL_ISCSI_DIRECT:
     case VIR_STORAGE_POOL_GLUSTER:
     case VIR_STORAGE_POOL_RBD:
 +    case VIR_STORAGE_POOL_VITASTOR:
         return VIR_STORAGE_VOL_NETWORK;
     case VIR_STORAGE_POOL_LOGICAL:
     case VIR_STORAGE_POOL_DISK:
 Index: libvirt-7.6.0/tests/storagepoolcapsschemadata/poolcaps-fs.xml
 ===================================================================
 --- libvirt-7.6.0.orig/tests/storagepoolcapsschemadata/poolcaps-fs.xml
 +++ libvirt-7.6.0/tests/storagepoolcapsschemadata/poolcaps-fs.xml
@@ -204,4 +204,11 @@
       </enum>
     </volOptions>
   </pool>
 +  <pool type='vitastor' supported='no'>
 +    <volOptions>
 +      <defaultFormat type='raw'/>
 +      <enum name='targetFormatType'>
 +      </enum>
 +    </volOptions>
 +  </pool>
 </storagepoolCapabilities>
 Index: libvirt-7.6.0/tests/storagepoolcapsschemadata/poolcaps-full.xml
 ===================================================================
 --- libvirt-7.6.0.orig/tests/storagepoolcapsschemadata/poolcaps-full.xml
 +++ libvirt-7.6.0/tests/storagepoolcapsschemadata/poolcaps-full.xml
@@ -204,4 +204,11 @@
       </enum>
     </volOptions>
   </pool>
 +  <pool type='vitastor' supported='yes'>
 +    <volOptions>
 +      <defaultFormat type='raw'/>
 +      <enum name='targetFormatType'>
 +      </enum>
 +    </volOptions>
 +  </pool>
 </storagepoolCapabilities>
 Index: libvirt-7.6.0/tests/storagepoolxml2argvtest.c
 ===================================================================
 --- libvirt-7.6.0.orig/tests/storagepoolxml2argvtest.c
 +++ libvirt-7.6.0/tests/storagepoolxml2argvtest.c
@@ -68,6 +68,7 @@ testCompareXMLToArgvFiles(bool shouldFai
     case VIR_STORAGE_POOL_GLUSTER:
     case VIR_STORAGE_POOL_ZFS:
     case VIR_STORAGE_POOL_VSTORAGE:
 +    case VIR_STORAGE_POOL_VITASTOR:
     case VIR_STORAGE_POOL_LAST:
     default:
         VIR_TEST_DEBUG("pool type '%s' has no xml2argv test", defTypeStr);
 Index: libvirt-7.6.0/tools/virsh-pool.c
 ===================================================================
 --- libvirt-7.6.0.orig/tools/virsh-pool.c
 +++ libvirt-7.6.0/tools/virsh-pool.c
@@ -1231,6 +1231,9 @@ cmdPoolList(vshControl *ctl, const vshCm
             case VIR_STORAGE_POOL_VSTORAGE:
                 flags |= VIR_CONNECT_LIST_STORAGE_POOLS_VSTORAGE;
                 break;
 +            case VIR_STORAGE_POOL_VITASTOR:
 +                flags |= VIR_CONNECT_LIST_STORAGE_POOLS_VITASTOR;
 +                break;
             case VIR_STORAGE_POOL_LAST:
                 break;
             }
--- a/patches/nova-21.diff
+++ b/patches/nova-21.diff
@ -1,288 +0,0 @@
 diff --git a/nova/virt/image/model.py b/nova/virt/image/model.py
 index 971f7e9c07..ec3fca72cb 100644
 --- a/nova/virt/image/model.py
 +++ b/nova/virt/image/model.py
@@ -129,3 +129,22 @@ class RBDImage(Image):
         self.user = user
         self.password = password
         self.servers = servers
 +
 +
 +class VitastorImage(Image):
 +    """Class for images in a remote Vitastor cluster"""
 +
 +    def __init__(self, name, etcd_address = None, etcd_prefix = None, config_path = None):
 +        """Create a new Vitastor image object
 +
 +        :param name: name of the image
 +        :param etcd_address: etcd URL(s) (optional)
 +        :param etcd_prefix: etcd prefix (optional)
 +        :param config_path: path to the configuration (optional)
 +        """
 +        super(VitastorImage, self).__init__(FORMAT_RAW)
 +
 +        self.name = name
 +        self.etcd_address = etcd_address
 +        self.etcd_prefix = etcd_prefix
 +        self.config_path = config_path
 diff --git a/nova/virt/images.py b/nova/virt/images.py
 index 5358f3766a..ebe3d6effb 100644
 --- a/nova/virt/images.py
 +++ b/nova/virt/images.py
@@ -41,7 +41,7 @@ IMAGE_API = glance.API()
 def qemu_img_info(path, format=None):
     """Return an object containing the parsed output from qemu-img info."""
 -    if not os.path.exists(path) and not path.startswith('rbd:'):
 +    if not os.path.exists(path) and not path.startswith('rbd:') and not path.startswith('vitastor:'):
         raise exception.DiskNotFound(location=path)
     info = nova.privsep.qemu.unprivileged_qemu_img_info(path, format=format)
@@ -50,7 +50,7 @@ def qemu_img_info(path, format=None):
 def privileged_qemu_img_info(path, format=None, output_format='json'):
     """Return an object containing the parsed output from qemu-img info."""
 -    if not os.path.exists(path) and not path.startswith('rbd:'):
 +    if not os.path.exists(path) and not path.startswith('rbd:') and not path.startswith('vitastor:'):
         raise exception.DiskNotFound(location=path)
     info = nova.privsep.qemu.privileged_qemu_img_info(path, format=format)
 diff --git a/nova/virt/libvirt/config.py b/nova/virt/libvirt/config.py
 index ea525648b3..d7aa798954 100644
 --- a/nova/virt/libvirt/config.py
 +++ b/nova/virt/libvirt/config.py
@@ -1005,6 +1005,8 @@ class LibvirtConfigGuestDisk(LibvirtConfigGuestDevice):
         self.driver_iommu = False
         self.source_path = None
         self.source_protocol = None
 +        self.source_query = None
 +        self.source_config = None
         self.source_name = None
         self.source_hosts = []
         self.source_ports = []
@@ -1133,6 +1135,10 @@ class LibvirtConfigGuestDisk(LibvirtConfigGuestDevice):
             source = etree.Element("source", protocol=self.source_protocol)
             if self.source_name is not None:
                 source.set('name', self.source_name)
 +            if self.source_query is not None:
 +                source.set('query', self.source_query)
 +            if self.source_config is not None:
 +                source.append(etree.Element('config', file=self.source_config))
             hosts_info = zip(self.source_hosts, self.source_ports)
             for name, port in hosts_info:
                 host = etree.Element('host', name=name)
 diff --git a/nova/virt/libvirt/driver.py b/nova/virt/libvirt/driver.py
 index fbd033690a..74dc59ce87 100644
 --- a/nova/virt/libvirt/driver.py
 +++ b/nova/virt/libvirt/driver.py
@@ -180,6 +180,7 @@ libvirt_volume_drivers = [
     'local=nova.virt.libvirt.volume.volume.LibvirtVolumeDriver',
     'fake=nova.virt.libvirt.volume.volume.LibvirtFakeVolumeDriver',
     'rbd=nova.virt.libvirt.volume.net.LibvirtNetVolumeDriver',
 +    'vitastor=nova.virt.libvirt.volume.vitastor.LibvirtVitastorVolumeDriver',
     'nfs=nova.virt.libvirt.volume.nfs.LibvirtNFSVolumeDriver',
     'smbfs=nova.virt.libvirt.volume.smbfs.LibvirtSMBFSVolumeDriver',
     'fibre_channel='
@@ -287,10 +288,10 @@ class LibvirtDriver(driver.ComputeDriver):
         # This prevents the risk of one test setting a capability
         # which bleeds over into other tests.
 -        # LVM and RBD require raw images. If we are not configured to
 +        # LVM, RBD, Vitastor require raw images. If we are not configured to
         # force convert images into raw format, then we _require_ raw
         # images only.
 -        raw_only = ('rbd', 'lvm')
 +        raw_only = ('rbd', 'lvm', 'vitastor')
         requires_raw_image = (CONF.libvirt.images_type in raw_only and
                               not CONF.force_raw_images)
         requires_ploop_image = CONF.libvirt.virt_type == 'parallels'
@@ -703,12 +704,12 @@ class LibvirtDriver(driver.ComputeDriver):
         # Some imagebackends are only able to import raw disk images,
         # and will fail if given any other format. See the bug
         # https://bugs.launchpad.net/nova/+bug/1816686 for more details.
 -        if CONF.libvirt.images_type in ('rbd',):
 +        if CONF.libvirt.images_type in ('rbd', 'vitastor'):
             if not CONF.force_raw_images:
                 msg = _("'[DEFAULT]/force_raw_images = False' is not "
 -                        "allowed with '[libvirt]/images_type = rbd'. "
 +                        "allowed with '[libvirt]/images_type = rbd' or 'vitastor'. "
                         "Please check the two configs and if you really "
 -                        "do want to use rbd as images_type, set "
 +                        "do want to use rbd or vitastor as images_type, set "
                         "force_raw_images to True.")
                 raise exception.InvalidConfiguration(msg)
@@ -2165,6 +2166,16 @@ class LibvirtDriver(driver.ComputeDriver):
                     if connection_info['data'].get('auth_enabled'):
                         username = connection_info['data']['auth_username']
                         path = f"rbd:{volume_name}:id={username}"
 +                elif connection_info['driver_volume_type'] == 'vitastor':
 +                    volume_name = connection_info['data']['name']
 +                    path = 'vitastor:image='+volume_name.replace(':', '\\:')
 +                    for k in [ 'config_path', 'etcd_address', 'etcd_prefix' ]:
 +                        if k in connection_info['data']:
 +                            kk = k
 +                            if kk == 'etcd_address':
 +                                # FIXME use etcd_address in qemu driver
 +                                kk = 'etcd_host'
 +                            path += ":"+kk.replace('_', '-')+"="+connection_info['data'][k].replace(':', '\\:')
                 else:
                     path = 'unknown'
                     raise exception.DiskNotFound(location='unknown')
@@ -2440,8 +2451,8 @@ class LibvirtDriver(driver.ComputeDriver):
         image_format = CONF.libvirt.snapshot_image_format or source_type
 -        # NOTE(bfilippov): save lvm and rbd as raw
 -        if image_format == 'lvm' or image_format == 'rbd':
 +        # NOTE(bfilippov): save lvm and rbd and vitastor as raw
 +        if image_format == 'lvm' or image_format == 'rbd' or image_format == 'vitastor':
             image_format = 'raw'
         metadata = self._create_snapshot_metadata(instance.image_meta,
@@ -2512,7 +2523,7 @@ class LibvirtDriver(driver.ComputeDriver):
                               expected_state=task_states.IMAGE_UPLOADING)
             # TODO(nic): possibly abstract this out to the root_disk
 -            if source_type == 'rbd' and live_snapshot:
 +            if (source_type == 'rbd' or source_type == 'vitastor') and live_snapshot:
                 # Standard snapshot uses qemu-img convert from RBD which is
                 # not safe to run with live_snapshot.
                 live_snapshot = False
@@ -3715,7 +3726,7 @@ class LibvirtDriver(driver.ComputeDriver):
         # cleanup rescue volume
         lvm.remove_volumes([lvmdisk for lvmdisk in self._lvm_disks(instance)
                                 if lvmdisk.endswith('.rescue')])
 -        if CONF.libvirt.images_type == 'rbd':
 +        if CONF.libvirt.images_type == 'rbd' or CONF.libvirt.images_type == 'vitastor':
             filter_fn = lambda disk: (disk.startswith(instance.uuid) and
                                       disk.endswith('.rescue'))
             rbd_utils.RBDDriver().cleanup_volumes(filter_fn)
@@ -3972,6 +3983,8 @@ class LibvirtDriver(driver.ComputeDriver):
         # TODO(mikal): there is a bug here if images_type has
         # changed since creation of the instance, but I am pretty
         # sure that this bug already exists.
 +        if CONF.libvirt.images_type == 'vitastor':
 +            return 'vitastor'
         return 'rbd' if CONF.libvirt.images_type == 'rbd' else 'raw'
     @staticmethod
@@ -4370,10 +4383,10 @@ class LibvirtDriver(driver.ComputeDriver):
                 finally:
                     # NOTE(mikal): if the config drive was imported into RBD,
                     # then we no longer need the local copy
 -                    if CONF.libvirt.images_type == 'rbd':
 +                    if CONF.libvirt.images_type == 'rbd' or CONF.libvirt.images_type == 'vitastor':
                         LOG.info('Deleting local config drive %(path)s '
 -                                 'because it was imported into RBD.',
 -                                 {'path': config_disk_local_path},
 +                                 'because it was imported into %(type).',
 +                                 {'path': config_disk_local_path, 'type': CONF.libvirt.images_type},
                                  instance=instance)
                         os.unlink(config_disk_local_path)
 diff --git a/nova/virt/libvirt/utils.py b/nova/virt/libvirt/utils.py
 index c1dc34daf4..263965912f 100644
 --- a/nova/virt/libvirt/utils.py
 +++ b/nova/virt/libvirt/utils.py
@@ -399,6 +399,10 @@ def find_disk(guest: libvirt_guest.Guest) -> ty.Tuple[str, ty.Optional[str]]:
             disk_path = disk.source_name
             if disk_path:
                 disk_path = 'rbd:' + disk_path
 +        elif not disk_path and disk.source_protocol == 'vitastor':
 +            disk_path = disk.source_name
 +            if disk_path:
 +                disk_path = 'vitastor:' + disk_path
     if not disk_path:
         raise RuntimeError(_("Can't retrieve root device path "
@@ -417,6 +421,8 @@ def get_disk_type_from_path(path: str) -> ty.Optional[str]:
         return 'lvm'
     elif path.startswith('rbd:'):
         return 'rbd'
 +    elif path.startswith('vitastor:'):
 +        return 'vitastor'
     elif (os.path.isdir(path) and
           os.path.exists(os.path.join(path, "DiskDescriptor.xml"))):
         return 'ploop'
 diff --git a/nova/virt/libvirt/volume/vitastor.py b/nova/virt/libvirt/volume/vitastor.py
 new file mode 100644
 index 0000000000..0256df62c1
 --- /dev/null
 +++ b/nova/virt/libvirt/volume/vitastor.py
@@ -0,0 +1,75 @@
 +# Copyright (c) 2021+, Vitaliy Filippov <vitalif@yourcmc.ru>
 +#
 +#    Licensed under the Apache License, Version 2.0 (the "License"); you may
 +#    not use this file except in compliance with the License. You may obtain
 +#    a copy of the License at
 +#
 +#         http://www.apache.org/licenses/LICENSE-2.0
 +#
 +#    Unless required by applicable law or agreed to in writing, software
 +#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 +#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 +#    License for the specific language governing permissions and limitations
 +#    under the License.
 +
 +from os_brick import exception as os_brick_exception
 +from os_brick import initiator
 +from os_brick.initiator import connector
 +from oslo_log import log as logging
 +
 +import nova.conf
 +from nova import utils
 +from nova.virt.libvirt.volume import volume as libvirt_volume
 +
 +
 +CONF = nova.conf.CONF
 +LOG = logging.getLogger(__name__)
 +
 +
 +class LibvirtVitastorVolumeDriver(libvirt_volume.LibvirtBaseVolumeDriver):
 +    """Driver to attach Vitastor volumes to libvirt."""
 +    def __init__(self, host):
 +        super(LibvirtVitastorVolumeDriver, self).__init__(host, is_block_dev=False)
 +
 +    def connect_volume(self, connection_info, instance):
 +        pass
 +
 +    def disconnect_volume(self, connection_info, instance):
 +        pass
 +
 +    def get_config(self, connection_info, disk_info):
 +        """Returns xml for libvirt."""
 +        conf = super(LibvirtVitastorVolumeDriver, self).get_config(connection_info, disk_info)
 +        conf.source_type = 'network'
 +        conf.source_protocol = 'vitastor'
 +        conf.source_name = connection_info['data'].get('name')
 +        conf.source_query = connection_info['data'].get('etcd_prefix') or None
 +        conf.source_config = connection_info['data'].get('config_path') or None
 +        conf.source_hosts = []
 +        conf.source_ports = []
 +        addresses = connection_info['data'].get('etcd_address', '')
 +        if addresses:
 +            if not isinstance(addresses, list):
 +                addresses = addresses.split(',')
 +            for addr in addresses:
 +                if addr.startswith('https://'):
 +                    raise NotImplementedError('Vitastor block driver does not support SSL for etcd communication yet')
 +                if addr.startswith('http://'):
 +                    addr = addr[7:]
 +                addr = addr.rstrip('/')
 +                if addr.endswith('/v3'):
 +                    addr = addr[0:-3]
 +                p = addr.find('/')
 +                if p > 0:
 +                    raise NotImplementedError('libvirt does not support custom URL paths for Vitastor etcd yet. Use /etc/vitastor/vitastor.conf')
 +                p = addr.find(':')
 +                port = '2379'
 +                if p > 0:
 +                    port = addr[p+1:]
 +                    addr = addr[0:p]
 +                conf.source_hosts.append(addr)
 +                conf.source_ports.append(port)
 +        return conf
 +
 +    def extend_volume(self, connection_info, instance, requested_size):
 +        raise NotImplementedError
--- a/patches/nova-23.diff
+++ b/patches/nova-23.diff
@ -1,288 +0,0 @@
 diff --git a/nova/virt/image/model.py b/nova/virt/image/model.py
 index 971f7e9c07..ec3fca72cb 100644
 --- a/nova/virt/image/model.py
 +++ b/nova/virt/image/model.py
@@ -129,3 +129,22 @@ class RBDImage(Image):
         self.user = user
         self.password = password
         self.servers = servers
 +
 +
 +class VitastorImage(Image):
 +    """Class for images in a remote Vitastor cluster"""
 +
 +    def __init__(self, name, etcd_address = None, etcd_prefix = None, config_path = None):
 +        """Create a new Vitastor image object
 +
 +        :param name: name of the image
 +        :param etcd_address: etcd URL(s) (optional)
 +        :param etcd_prefix: etcd prefix (optional)
 +        :param config_path: path to the configuration (optional)
 +        """
 +        super(VitastorImage, self).__init__(FORMAT_RAW)
 +
 +        self.name = name
 +        self.etcd_address = etcd_address
 +        self.etcd_prefix = etcd_prefix
 +        self.config_path = config_path
 diff --git a/nova/virt/images.py b/nova/virt/images.py
 index 5358f3766a..ebe3d6effb 100644
 --- a/nova/virt/images.py
 +++ b/nova/virt/images.py
@@ -41,7 +41,7 @@ IMAGE_API = glance.API()
 def qemu_img_info(path, format=None):
     """Return an object containing the parsed output from qemu-img info."""
 -    if not os.path.exists(path) and not path.startswith('rbd:'):
 +    if not os.path.exists(path) and not path.startswith('rbd:') and not path.startswith('vitastor:'):
         raise exception.DiskNotFound(location=path)
     info = nova.privsep.qemu.unprivileged_qemu_img_info(path, format=format)
@@ -50,7 +50,7 @@ def qemu_img_info(path, format=None):
 def privileged_qemu_img_info(path, format=None, output_format='json'):
     """Return an object containing the parsed output from qemu-img info."""
 -    if not os.path.exists(path) and not path.startswith('rbd:'):
 +    if not os.path.exists(path) and not path.startswith('rbd:') and not path.startswith('vitastor:'):
         raise exception.DiskNotFound(location=path)
     info = nova.privsep.qemu.privileged_qemu_img_info(path, format=format)
 diff --git a/nova/virt/libvirt/config.py b/nova/virt/libvirt/config.py
 index f9475776b3..a2e18aab67 100644
 --- a/nova/virt/libvirt/config.py
 +++ b/nova/virt/libvirt/config.py
@@ -1060,6 +1060,8 @@ class LibvirtConfigGuestDisk(LibvirtConfigGuestDevice):
         self.driver_iommu = False
         self.source_path = None
         self.source_protocol = None
 +        self.source_query = None
 +        self.source_config = None
         self.source_name = None
         self.source_hosts = []
         self.source_ports = []
@@ -1189,6 +1191,10 @@ class LibvirtConfigGuestDisk(LibvirtConfigGuestDevice):
             source = etree.Element("source", protocol=self.source_protocol)
             if self.source_name is not None:
                 source.set('name', self.source_name)
 +            if self.source_query is not None:
 +                source.set('query', self.source_query)
 +            if self.source_config is not None:
 +                source.append(etree.Element('config', file=self.source_config))
             hosts_info = zip(self.source_hosts, self.source_ports)
             for name, port in hosts_info:
                 host = etree.Element('host', name=name)
 diff --git a/nova/virt/libvirt/driver.py b/nova/virt/libvirt/driver.py
 index 391231c527..f38faa1608 100644
 --- a/nova/virt/libvirt/driver.py
 +++ b/nova/virt/libvirt/driver.py
@@ -179,6 +179,7 @@ VOLUME_DRIVERS = {
     'local': 'nova.virt.libvirt.volume.volume.LibvirtVolumeDriver',
     'fake': 'nova.virt.libvirt.volume.volume.LibvirtFakeVolumeDriver',
     'rbd': 'nova.virt.libvirt.volume.net.LibvirtNetVolumeDriver',
 +    'vitastor': 'nova.virt.libvirt.volume.vitastor.LibvirtVitastorVolumeDriver',
     'nfs': 'nova.virt.libvirt.volume.nfs.LibvirtNFSVolumeDriver',
     'smbfs': 'nova.virt.libvirt.volume.smbfs.LibvirtSMBFSVolumeDriver',
     'fibre_channel': 'nova.virt.libvirt.volume.fibrechannel.LibvirtFibreChannelVolumeDriver',  # noqa:E501
@@ -385,10 +386,10 @@ class LibvirtDriver(driver.ComputeDriver):
         # This prevents the risk of one test setting a capability
         # which bleeds over into other tests.
 -        # LVM and RBD require raw images. If we are not configured to
 +        # LVM, RBD, Vitastor require raw images. If we are not configured to
         # force convert images into raw format, then we _require_ raw
         # images only.
 -        raw_only = ('rbd', 'lvm')
 +        raw_only = ('rbd', 'lvm', 'vitastor')
         requires_raw_image = (CONF.libvirt.images_type in raw_only and
                               not CONF.force_raw_images)
         requires_ploop_image = CONF.libvirt.virt_type == 'parallels'
@@ -775,12 +776,12 @@ class LibvirtDriver(driver.ComputeDriver):
         # Some imagebackends are only able to import raw disk images,
         # and will fail if given any other format. See the bug
         # https://bugs.launchpad.net/nova/+bug/1816686 for more details.
 -        if CONF.libvirt.images_type in ('rbd',):
 +        if CONF.libvirt.images_type in ('rbd', 'vitastor'):
             if not CONF.force_raw_images:
                 msg = _("'[DEFAULT]/force_raw_images = False' is not "
 -                        "allowed with '[libvirt]/images_type = rbd'. "
 +                        "allowed with '[libvirt]/images_type = rbd' or 'vitastor'. "
                         "Please check the two configs and if you really "
 -                        "do want to use rbd as images_type, set "
 +                        "do want to use rbd or vitastor as images_type, set "
                         "force_raw_images to True.")
                 raise exception.InvalidConfiguration(msg)
@@ -2603,6 +2604,16 @@ class LibvirtDriver(driver.ComputeDriver):
                     if connection_info['data'].get('auth_enabled'):
                         username = connection_info['data']['auth_username']
                         path = f"rbd:{volume_name}:id={username}"
 +                elif connection_info['driver_volume_type'] == 'vitastor':
 +                    volume_name = connection_info['data']['name']
 +                    path = 'vitastor:image='+volume_name.replace(':', '\\:')
 +                    for k in [ 'config_path', 'etcd_address', 'etcd_prefix' ]:
 +                        if k in connection_info['data']:
 +                            kk = k
 +                            if kk == 'etcd_address':
 +                                # FIXME use etcd_address in qemu driver
 +                                kk = 'etcd_host'
 +                            path += ":"+kk.replace('_', '-')+"="+connection_info['data'][k].replace(':', '\\:')
                 else:
                     path = 'unknown'
                     raise exception.DiskNotFound(location='unknown')
@@ -2827,8 +2838,8 @@ class LibvirtDriver(driver.ComputeDriver):
         image_format = CONF.libvirt.snapshot_image_format or source_type
 -        # NOTE(bfilippov): save lvm and rbd as raw
 -        if image_format == 'lvm' or image_format == 'rbd':
 +        # NOTE(bfilippov): save lvm and rbd and vitastor as raw
 +        if image_format == 'lvm' or image_format == 'rbd' or image_format == 'vitastor':
             image_format = 'raw'
         metadata = self._create_snapshot_metadata(instance.image_meta,
@@ -2899,7 +2910,7 @@ class LibvirtDriver(driver.ComputeDriver):
                               expected_state=task_states.IMAGE_UPLOADING)
             # TODO(nic): possibly abstract this out to the root_disk
 -            if source_type == 'rbd' and live_snapshot:
 +            if (source_type == 'rbd' or source_type == 'vitastor') and live_snapshot:
                 # Standard snapshot uses qemu-img convert from RBD which is
                 # not safe to run with live_snapshot.
                 live_snapshot = False
@@ -4099,7 +4110,7 @@ class LibvirtDriver(driver.ComputeDriver):
         # cleanup rescue volume
         lvm.remove_volumes([lvmdisk for lvmdisk in self._lvm_disks(instance)
                                 if lvmdisk.endswith('.rescue')])
 -        if CONF.libvirt.images_type == 'rbd':
 +        if CONF.libvirt.images_type == 'rbd' or CONF.libvirt.images_type == 'vitastor':
             filter_fn = lambda disk: (disk.startswith(instance.uuid) and
                                       disk.endswith('.rescue'))
             rbd_utils.RBDDriver().cleanup_volumes(filter_fn)
@@ -4356,6 +4367,8 @@ class LibvirtDriver(driver.ComputeDriver):
         # TODO(mikal): there is a bug here if images_type has
         # changed since creation of the instance, but I am pretty
         # sure that this bug already exists.
 +        if CONF.libvirt.images_type == 'vitastor':
 +            return 'vitastor'
         return 'rbd' if CONF.libvirt.images_type == 'rbd' else 'raw'
     @staticmethod
@@ -4764,10 +4777,10 @@ class LibvirtDriver(driver.ComputeDriver):
                 finally:
                     # NOTE(mikal): if the config drive was imported into RBD,
                     # then we no longer need the local copy
 -                    if CONF.libvirt.images_type == 'rbd':
 +                    if CONF.libvirt.images_type == 'rbd' or CONF.libvirt.images_type == 'vitastor':
                         LOG.info('Deleting local config drive %(path)s '
 -                                 'because it was imported into RBD.',
 -                                 {'path': config_disk_local_path},
 +                                 'because it was imported into %(type).',
 +                                 {'path': config_disk_local_path, 'type': CONF.libvirt.images_type},
                                  instance=instance)
                         os.unlink(config_disk_local_path)
 diff --git a/nova/virt/libvirt/utils.py b/nova/virt/libvirt/utils.py
 index da2a6e8b8a..52c02e72f1 100644
 --- a/nova/virt/libvirt/utils.py
 +++ b/nova/virt/libvirt/utils.py
@@ -340,6 +340,10 @@ def find_disk(guest: libvirt_guest.Guest) -> ty.Tuple[str, ty.Optional[str]]:
             disk_path = disk.source_name
             if disk_path:
                 disk_path = 'rbd:' + disk_path
 +        elif not disk_path and disk.source_protocol == 'vitastor':
 +            disk_path = disk.source_name
 +            if disk_path:
 +                disk_path = 'vitastor:' + disk_path
     if not disk_path:
         raise RuntimeError(_("Can't retrieve root device path "
@@ -354,6 +358,8 @@ def get_disk_type_from_path(path: str) -> ty.Optional[str]:
         return 'lvm'
     elif path.startswith('rbd:'):
         return 'rbd'
 +    elif path.startswith('vitastor:'):
 +        return 'vitastor'
     elif (os.path.isdir(path) and
           os.path.exists(os.path.join(path, "DiskDescriptor.xml"))):
         return 'ploop'
 diff --git a/nova/virt/libvirt/volume/vitastor.py b/nova/virt/libvirt/volume/vitastor.py
 new file mode 100644
 index 0000000000..0256df62c1
 --- /dev/null
 +++ b/nova/virt/libvirt/volume/vitastor.py
@@ -0,0 +1,75 @@
 +# Copyright (c) 2021+, Vitaliy Filippov <vitalif@yourcmc.ru>
 +#
 +#    Licensed under the Apache License, Version 2.0 (the "License"); you may
 +#    not use this file except in compliance with the License. You may obtain
 +#    a copy of the License at
 +#
 +#         http://www.apache.org/licenses/LICENSE-2.0
 +#
 +#    Unless required by applicable law or agreed to in writing, software
 +#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 +#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 +#    License for the specific language governing permissions and limitations
 +#    under the License.
 +
 +from os_brick import exception as os_brick_exception
 +from os_brick import initiator
 +from os_brick.initiator import connector
 +from oslo_log import log as logging
 +
 +import nova.conf
 +from nova import utils
 +from nova.virt.libvirt.volume import volume as libvirt_volume
 +
 +
 +CONF = nova.conf.CONF
 +LOG = logging.getLogger(__name__)
 +
 +
 +class LibvirtVitastorVolumeDriver(libvirt_volume.LibvirtBaseVolumeDriver):
 +    """Driver to attach Vitastor volumes to libvirt."""
 +    def __init__(self, host):
 +        super(LibvirtVitastorVolumeDriver, self).__init__(host, is_block_dev=False)
 +
 +    def connect_volume(self, connection_info, instance):
 +        pass
 +
 +    def disconnect_volume(self, connection_info, instance):
 +        pass
 +
 +    def get_config(self, connection_info, disk_info):
 +        """Returns xml for libvirt."""
 +        conf = super(LibvirtVitastorVolumeDriver, self).get_config(connection_info, disk_info)
 +        conf.source_type = 'network'
 +        conf.source_protocol = 'vitastor'
 +        conf.source_name = connection_info['data'].get('name')
 +        conf.source_query = connection_info['data'].get('etcd_prefix') or None
 +        conf.source_config = connection_info['data'].get('config_path') or None
 +        conf.source_hosts = []
 +        conf.source_ports = []
 +        addresses = connection_info['data'].get('etcd_address', '')
 +        if addresses:
 +            if not isinstance(addresses, list):
 +                addresses = addresses.split(',')
 +            for addr in addresses:
 +                if addr.startswith('https://'):
 +                    raise NotImplementedError('Vitastor block driver does not support SSL for etcd communication yet')
 +                if addr.startswith('http://'):
 +                    addr = addr[7:]
 +                addr = addr.rstrip('/')
 +                if addr.endswith('/v3'):
 +                    addr = addr[0:-3]
 +                p = addr.find('/')
 +                if p > 0:
 +                    raise NotImplementedError('libvirt does not support custom URL paths for Vitastor etcd yet. Use /etc/vitastor/vitastor.conf')
 +                p = addr.find(':')
 +                port = '2379'
 +                if p > 0:
 +                    port = addr[p+1:]
 +                    addr = addr[0:p]
 +                conf.source_hosts.append(addr)
 +                conf.source_ports.append(port)
 +        return conf
 +
 +    def extend_volume(self, connection_info, instance, requested_size):
 +        raise NotImplementedError
--- a/patches/pve-qemu-5.1-vitastor.patch
+++ b/patches/pve-qemu-5.1-vitastor.patch
@ -1,175 +0,0 @@
 Index: pve-qemu-kvm-5.1.0/qapi/block-core.json
 ===================================================================
 --- pve-qemu-kvm-5.1.0.orig/qapi/block-core.json
 +++ pve-qemu-kvm-5.1.0/qapi/block-core.json
@@ -3041,7 +3041,7 @@
             'luks', 'nbd', 'nfs', 'null-aio', 'null-co', 'nvme', 'parallels',
             'qcow', 'qcow2', 'qed', 'quorum', 'raw', 'rbd',
             { 'name': 'replication', 'if': 'defined(CONFIG_REPLICATION)' },
 -            'sheepdog', 'pbs',
 +            'sheepdog', 'pbs', 'vitastor',
             'ssh', 'throttle', 'vdi', 'vhdx', 'vmdk', 'vpc', 'vvfat' ] }
 ##
@@ -3889,6 +3889,28 @@
             '*tag': 'str' } }
 ##
 +# @BlockdevOptionsVitastor:
 +#
 +# Driver specific block device options for vitastor
 +#
 +# @image:       Image name
 +# @inode:       Inode number
 +# @pool:        Pool ID
 +# @size:        Desired image size in bytes
 +# @config-path: Path to Vitastor configuration
 +# @etcd-host:   etcd connection address(es)
 +# @etcd-prefix: etcd key/value prefix
 +##
 +{ 'struct': 'BlockdevOptionsVitastor',
 +  'data': { '*inode': 'uint64',
 +            '*pool': 'uint64',
 +            '*size': 'uint64',
 +            '*image': 'str',
 +            '*config-path': 'str',
 +            '*etcd-host': 'str',
 +            '*etcd-prefix': 'str' } }
 +
 +##
 # @ReplicationMode:
 #
 # An enumeration of replication modes.
@@ -4234,6 +4256,7 @@
       'replication': { 'type': 'BlockdevOptionsReplication',
                        'if': 'defined(CONFIG_REPLICATION)' },
       'sheepdog':   'BlockdevOptionsSheepdog',
 +      'vitastor':   'BlockdevOptionsVitastor',
       'ssh':        'BlockdevOptionsSsh',
       'throttle':   'BlockdevOptionsThrottle',
       'vdi':        'BlockdevOptionsGenericFormat',
@@ -4623,6 +4646,17 @@
             '*cluster-size' :   'size' } }
 ##
 +# @BlockdevCreateOptionsVitastor:
 +#
 +# Driver specific image creation options for Vitastor.
 +#
 +# @size: Size of the virtual disk in bytes
 +##
 +{ 'struct': 'BlockdevCreateOptionsVitastor',
 +  'data': { 'location':         'BlockdevOptionsVitastor',
 +            'size':             'size' } }
 +
 +##
 # @BlockdevVmdkSubformat:
 #
 # Subformat options for VMDK images
@@ -4884,6 +4918,7 @@
       'qed':            'BlockdevCreateOptionsQed',
       'rbd':            'BlockdevCreateOptionsRbd',
       'sheepdog':       'BlockdevCreateOptionsSheepdog',
 +      'vitastor':       'BlockdevCreateOptionsVitastor',
       'ssh':            'BlockdevCreateOptionsSsh',
       'vdi':            'BlockdevCreateOptionsVdi',
       'vhdx':           'BlockdevCreateOptionsVhdx',
 Index: pve-qemu-kvm-5.1.0/configure
 ===================================================================
 --- pve-qemu-kvm-5.1.0.orig/configure
 +++ pve-qemu-kvm-5.1.0/configure
@@ -446,6 +446,7 @@ trace_backends="log"
 trace_file="trace"
 spice=""
 rbd=""
 +vitastor=""
 smartcard=""
 libusb=""
 usb_redir=""
@@ -1383,6 +1384,10 @@ for opt do
   ;;
   --enable-rbd) rbd="yes"
   ;;
 +  --disable-vitastor) vitastor="no"
 +  ;;
 +  --enable-vitastor) vitastor="yes"
 +  ;;
   --disable-xfsctl) xfs="no"
   ;;
   --enable-xfsctl) xfs="yes"
@@ -1901,6 +1906,7 @@ disabled with --disable-FEATURE, default
   vhost-vdpa      vhost-vdpa kernel backend support
   spice           spice
   rbd             rados block device (rbd)
 +  vitastor        vitastor block device
   libiscsi        iscsi support
   libnfs          nfs support
   smartcard       smartcard support (libcacard)
@@ -4234,6 +4240,27 @@ EOF
 fi
 ##########################################
 +# vitastor probe
 +if test "$vitastor" != "no" ; then
 +  cat > $TMPC <<EOF
 +#include <vitastor_c.h>
 +int main(void) {
 +  vitastor_c_create_qemu(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
 +  return 0;
 +}
 +EOF
 +  vitastor_libs="-lvitastor_client"
 +  if compile_prog "" "$vitastor_libs" ; then
 +    vitastor=yes
 +  else
 +    if test "$vitastor" = "yes" ; then
 +      feature_not_found "vitastor block device" "Install vitastor-client-dev"
 +    fi
 +    vitastor=no
 +  fi
 +fi
 +
 +##########################################
 # libssh probe
 if test "$libssh" != "no" ; then
   if $pkg_config --exists libssh; then
@@ -6969,6 +6996,7 @@ echo "Trace output file $trace_file-<pid
 fi
 echo "spice support     $spice $(echo_version $spice $spice_protocol_version/$spice_server_version)"
 echo "rbd support       $rbd"
 +echo "vitastor support  $vitastor"
 echo "xfsctl support    $xfs"
 echo "smartcard support $smartcard"
 echo "libusb            $libusb"
@@ -7644,6 +7672,10 @@ if test "$rbd" = "yes" ; then
   echo "RBD_CFLAGS=$rbd_cflags" >> $config_host_mak
   echo "RBD_LIBS=$rbd_libs" >> $config_host_mak
 fi
 +if test "$vitastor" = "yes" ; then
 +  echo "CONFIG_VITASTOR=y" >> $config_host_mak
 +  echo "VITASTOR_LIBS=$vitastor_libs" >> $config_host_mak
 +fi
 echo "CONFIG_COROUTINE_BACKEND=$coroutine" >> $config_host_mak
 if test "$coroutine_pool" = "yes" ; then
 Index: pve-qemu-kvm-5.1.0/block/Makefile.objs
 ===================================================================
 --- pve-qemu-kvm-5.1.0.orig/block/Makefile.objs
 +++ pve-qemu-kvm-5.1.0/block/Makefile.objs
@@ -32,6 +32,7 @@ block-obj-$(if $(CONFIG_LIBISCSI),y,n) +
 block-obj-$(CONFIG_LIBNFS) += nfs.o
 block-obj-$(CONFIG_CURL) += curl.o
 block-obj-$(CONFIG_RBD) += rbd.o
 +block-obj-$(CONFIG_VITASTOR) += vitastor.o
 block-obj-$(CONFIG_GLUSTERFS) += gluster.o
 block-obj-$(CONFIG_LIBSSH) += ssh.o
 block-obj-y += backup-dump.o
@@ -61,6 +62,8 @@ curl.o-cflags      := $(CURL_CFLAGS)
 curl.o-libs        := $(CURL_LIBS)
 rbd.o-cflags       := $(RBD_CFLAGS)
 rbd.o-libs         := $(RBD_LIBS)
 +vitastor.o-cflags  := $(VITASTOR_CFLAGS)
 +vitastor.o-libs    := $(VITASTOR_LIBS)
 gluster.o-cflags   := $(GLUSTERFS_CFLAGS)
 gluster.o-libs     := $(GLUSTERFS_LIBS)
 ssh.o-cflags       := $(LIBSSH_CFLAGS)
--- a/patches/pve-qemu-5.2-vitastor.patch
+++ b/patches/pve-qemu-5.2-vitastor.patch
@ -1,181 +0,0 @@
 Index: pve-qemu-kvm-5.2.0/qapi/block-core.json
 ===================================================================
 --- pve-qemu-kvm-5.2.0.orig/qapi/block-core.json
 +++ pve-qemu-kvm-5.2.0/qapi/block-core.json
@@ -3076,7 +3076,7 @@
             'luks', 'nbd', 'nfs', 'null-aio', 'null-co', 'nvme', 'parallels',
             'qcow', 'qcow2', 'qed', 'quorum', 'raw', 'rbd',
             { 'name': 'replication', 'if': 'defined(CONFIG_REPLICATION)' },
 -            'sheepdog', 'pbs',
 +            'sheepdog', 'pbs', 'vitastor',
             'ssh', 'throttle', 'vdi', 'vhdx', 'vmdk', 'vpc', 'vvfat' ] }
 ##
@@ -3924,6 +3924,28 @@
             '*tag': 'str' } }
 ##
 +# @BlockdevOptionsVitastor:
 +#
 +# Driver specific block device options for vitastor
 +#
 +# @image:       Image name
 +# @inode:       Inode number
 +# @pool:        Pool ID
 +# @size:        Desired image size in bytes
 +# @config-path: Path to Vitastor configuration
 +# @etcd-host:   etcd connection address(es)
 +# @etcd-prefix: etcd key/value prefix
 +##
 +{ 'struct': 'BlockdevOptionsVitastor',
 +  'data': { '*inode': 'uint64',
 +            '*pool': 'uint64',
 +            '*size': 'uint64',
 +            '*image': 'str',
 +            '*config-path': 'str',
 +            '*etcd-host': 'str',
 +            '*etcd-prefix': 'str' } }
 +
 +##
 # @ReplicationMode:
 #
 # An enumeration of replication modes.
@@ -4272,6 +4294,7 @@
       'replication': { 'type': 'BlockdevOptionsReplication',
                        'if': 'defined(CONFIG_REPLICATION)' },
       'sheepdog':   'BlockdevOptionsSheepdog',
 +      'vitastor':   'BlockdevOptionsVitastor',
       'ssh':        'BlockdevOptionsSsh',
       'throttle':   'BlockdevOptionsThrottle',
       'vdi':        'BlockdevOptionsGenericFormat',
@@ -4662,6 +4685,17 @@
             '*cluster-size' :   'size' } }
 ##
 +# @BlockdevCreateOptionsVitastor:
 +#
 +# Driver specific image creation options for Vitastor.
 +#
 +# @size: Size of the virtual disk in bytes
 +##
 +{ 'struct': 'BlockdevCreateOptionsVitastor',
 +  'data': { 'location':         'BlockdevOptionsVitastor',
 +            'size':             'size' } }
 +
 +##
 # @BlockdevVmdkSubformat:
 #
 # Subformat options for VMDK images
@@ -4923,6 +4957,7 @@
       'qed':            'BlockdevCreateOptionsQed',
       'rbd':            'BlockdevCreateOptionsRbd',
       'sheepdog':       'BlockdevCreateOptionsSheepdog',
 +      'vitastor':       'BlockdevCreateOptionsVitastor',
       'ssh':            'BlockdevCreateOptionsSsh',
       'vdi':            'BlockdevCreateOptionsVdi',
       'vhdx':           'BlockdevCreateOptionsVhdx',
 Index: pve-qemu-kvm-5.2.0/block/meson.build
 ===================================================================
 --- pve-qemu-kvm-5.2.0.orig/block/meson.build
 +++ pve-qemu-kvm-5.2.0/block/meson.build
@@ -89,6 +89,7 @@ foreach m : [
   ['CONFIG_LIBNFS', 'nfs', libnfs, 'nfs.c'],
   ['CONFIG_LIBSSH', 'ssh', libssh, 'ssh.c'],
   ['CONFIG_RBD', 'rbd', rbd, 'rbd.c'],
 +  ['CONFIG_VITASTOR', 'vitastor', vitastor, 'vitastor.c'],
 ]
   if config_host.has_key(m[0])
     if enable_modules
 Index: pve-qemu-kvm-5.2.0/configure
 ===================================================================
 --- pve-qemu-kvm-5.2.0.orig/configure
 +++ pve-qemu-kvm-5.2.0/configure
@@ -372,6 +372,7 @@ trace_backends="log"
 trace_file="trace"
 spice=""
 rbd=""
 +vitastor=""
 smartcard=""
 u2f="auto"
 libusb=""
@@ -1264,6 +1265,10 @@ for opt do
   ;;
   --enable-rbd) rbd="yes"
   ;;
 +  --disable-vitastor) vitastor="no"
 +  ;;
 +  --enable-vitastor) vitastor="yes"
 +  ;;
   --disable-xfsctl) xfs="no"
   ;;
   --enable-xfsctl) xfs="yes"
@@ -1807,6 +1812,7 @@ disabled with --disable-FEATURE, default
   vhost-vdpa      vhost-vdpa kernel backend support
   spice           spice
   rbd             rados block device (rbd)
 +  vitastor        vitastor block device
   libiscsi        iscsi support
   libnfs          nfs support
   smartcard       smartcard support (libcacard)
@@ -3700,6 +3706,27 @@ EOF
 fi
 ##########################################
 +# vitastor probe
 +if test "$vitastor" != "no" ; then
 +  cat > $TMPC <<EOF
 +#include <vitastor_c.h>
 +int main(void) {
 +  vitastor_c_create_qemu(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
 +  return 0;
 +}
 +EOF
 +  vitastor_libs="-lvitastor_client"
 +  if compile_prog "" "$vitastor_libs" ; then
 +    vitastor=yes
 +  else
 +    if test "$vitastor" = "yes" ; then
 +      feature_not_found "vitastor block device" "Install vitastor-client-dev"
 +    fi
 +    vitastor=no
 +  fi
 +fi
 +
 +##########################################
 # libssh probe
 if test "$libssh" != "no" ; then
   if $pkg_config --exists libssh; then
@@ -6437,6 +6464,10 @@ if test "$rbd" = "yes" ; then
   echo "CONFIG_RBD=y" >> $config_host_mak
   echo "RBD_LIBS=$rbd_libs" >> $config_host_mak
 fi
 +if test "$vitastor" = "yes" ; then
 +  echo "CONFIG_VITASTOR=y" >> $config_host_mak
 +  echo "VITASTOR_LIBS=$vitastor_libs" >> $config_host_mak
 +fi
 echo "CONFIG_COROUTINE_BACKEND=$coroutine" >> $config_host_mak
 if test "$coroutine_pool" = "yes" ; then
 Index: pve-qemu-kvm-5.2.0/meson.build
 ===================================================================
 --- pve-qemu-kvm-5.2.0.orig/meson.build
 +++ pve-qemu-kvm-5.2.0/meson.build
@@ -596,6 +596,10 @@ rbd = not_found
 if 'CONFIG_RBD' in config_host
   rbd = declare_dependency(link_args: config_host['RBD_LIBS'].split())
 endif
 +vitastor = not_found
 +if 'CONFIG_VITASTOR' in config_host
 +  vitastor = declare_dependency(link_args: config_host['VITASTOR_LIBS'].split())
 +endif
 glusterfs = not_found
 if 'CONFIG_GLUSTERFS' in config_host
   glusterfs = declare_dependency(compile_args: config_host['GLUSTERFS_CFLAGS'].split(),
@@ -2151,6 +2155,7 @@ endif
 # TODO: add back protocol and server version
 summary_info += {'spice support':     config_host.has_key('CONFIG_SPICE')}
 summary_info += {'rbd support':       config_host.has_key('CONFIG_RBD')}
 +summary_info += {'vitastor support':  config_host.has_key('CONFIG_VITASTOR')}
 summary_info += {'xfsctl support':    config_host.has_key('CONFIG_XFS')}
 summary_info += {'smartcard support': config_host.has_key('CONFIG_SMARTCARD')}
 summary_info += {'U2F support':       u2f.found()}
--- a/patches/pve-qemu-6.1-vitastor.patch
+++ b/patches/pve-qemu-6.1-vitastor.patch
@ -1,188 +0,0 @@
 Index: pve-qemu-kvm-6.1.0/qapi/block-core.json
 ===================================================================
 --- pve-qemu-kvm-6.1.0.orig/qapi/block-core.json
 +++ pve-qemu-kvm-6.1.0/qapi/block-core.json
@@ -3084,7 +3084,7 @@
             'preallocate', 'qcow', 'qcow2', 'qed', 'quorum', 'raw', 'rbd',
             { 'name': 'replication', 'if': 'defined(CONFIG_REPLICATION)' },
             'pbs',
 -            'ssh', 'throttle', 'vdi', 'vhdx', 'vmdk', 'vpc', 'vvfat' ] }
 +            'ssh', 'throttle', 'vdi', 'vhdx', 'vitastor', 'vmdk', 'vpc', 'vvfat' ] }
 ##
 # @BlockdevOptionsFile:
@@ -4020,6 +4020,28 @@
             '*server': ['InetSocketAddressBase'] } }
 ##
 +# @BlockdevOptionsVitastor:
 +#
 +# Driver specific block device options for vitastor
 +#
 +# @image:       Image name
 +# @inode:       Inode number
 +# @pool:        Pool ID
 +# @size:        Desired image size in bytes
 +# @config-path: Path to Vitastor configuration
 +# @etcd-host:   etcd connection address(es)
 +# @etcd-prefix: etcd key/value prefix
 +##
 +{ 'struct': 'BlockdevOptionsVitastor',
 +  'data': { '*inode': 'uint64',
 +            '*pool': 'uint64',
 +            '*size': 'uint64',
 +            '*image': 'str',
 +            '*config-path': 'str',
 +            '*etcd-host': 'str',
 +            '*etcd-prefix': 'str' } }
 +
 +##
 # @ReplicationMode:
 #
 # An enumeration of replication modes.
@@ -4392,6 +4414,7 @@
       'throttle':   'BlockdevOptionsThrottle',
       'vdi':        'BlockdevOptionsGenericFormat',
       'vhdx':       'BlockdevOptionsGenericFormat',
 +      'vitastor':   'BlockdevOptionsVitastor',
       'vmdk':       'BlockdevOptionsGenericCOWFormat',
       'vpc':        'BlockdevOptionsGenericFormat',
       'vvfat':      'BlockdevOptionsVVFAT'
@@ -4782,6 +4805,17 @@
             '*encrypt' :        'RbdEncryptionCreateOptions' } }
 ##
 +# @BlockdevCreateOptionsVitastor:
 +#
 +# Driver specific image creation options for Vitastor.
 +#
 +# @size: Size of the virtual disk in bytes
 +##
 +{ 'struct': 'BlockdevCreateOptionsVitastor',
 +  'data': { 'location':         'BlockdevOptionsVitastor',
 +            'size':             'size' } }
 +
 +##
 # @BlockdevVmdkSubformat:
 #
 # Subformat options for VMDK images
@@ -4977,6 +5011,7 @@
       'ssh':            'BlockdevCreateOptionsSsh',
       'vdi':            'BlockdevCreateOptionsVdi',
       'vhdx':           'BlockdevCreateOptionsVhdx',
 +      'vitastor':       'BlockdevCreateOptionsVitastor',
       'vmdk':           'BlockdevCreateOptionsVmdk',
       'vpc':            'BlockdevCreateOptionsVpc'
   } }
 Index: pve-qemu-kvm-6.1.0/block/meson.build
 ===================================================================
 --- pve-qemu-kvm-6.1.0.orig/block/meson.build
 +++ pve-qemu-kvm-6.1.0/block/meson.build
@@ -91,6 +91,7 @@ foreach m : [
   [libnfs, 'nfs', files('nfs.c')],
   [libssh, 'ssh', files('ssh.c')],
   [rbd, 'rbd', files('rbd.c')],
 +  [vitastor, 'vitastor', files('vitastor.c')],
 ]
   if m[0].found()
     module_ss = ss.source_set()
 Index: pve-qemu-kvm-6.1.0/configure
 ===================================================================
 --- pve-qemu-kvm-6.1.0.orig/configure
 +++ pve-qemu-kvm-6.1.0/configure
@@ -375,6 +375,7 @@ trace_file="trace"
 spice="$default_feature"
 spice_protocol="auto"
 rbd="auto"
 +vitastor="auto"
 smartcard="auto"
 u2f="auto"
 libusb="auto"
@@ -1293,6 +1294,10 @@ for opt do
   ;;
   --enable-rbd) rbd="enabled"
   ;;
 +  --disable-vitastor) vitastor="disabled"
 +  ;;
 +  --enable-vitastor) vitastor="enabled"
 +  ;;
   --disable-xfsctl) xfs="no"
   ;;
   --enable-xfsctl) xfs="yes"
@@ -1921,6 +1926,7 @@ disabled with --disable-FEATURE, default
   spice           spice
   spice-protocol  spice-protocol
   rbd             rados block device (rbd)
 +  vitastor        vitastor block device
   libiscsi        iscsi support
   libnfs          nfs support
   smartcard       smartcard support (libcacard)
@@ -5211,7 +5217,7 @@ if test "$skip_meson" = no; then
         -Dcapstone=$capstone -Dslirp=$slirp -Dfdt=$fdt -Dbrlapi=$brlapi \
         -Dcurl=$curl -Dglusterfs=$glusterfs -Dbzip2=$bzip2 -Dlibiscsi=$libiscsi \
         -Dlibnfs=$libnfs -Diconv=$iconv -Dcurses=$curses -Dlibudev=$libudev\
 -        -Drbd=$rbd -Dlzo=$lzo -Dsnappy=$snappy -Dlzfse=$lzfse -Dlibxml2=$libxml2 \
 +        -Drbd=$rbd -Dvitastor=$vitastor -Dlzo=$lzo -Dsnappy=$snappy -Dlzfse=$lzfse -Dlibxml2=$libxml2 \
         -Dlibdaxctl=$libdaxctl -Dlibpmem=$libpmem -Dlinux_io_uring=$linux_io_uring \
         -Dgnutls=$gnutls -Dnettle=$nettle -Dgcrypt=$gcrypt -Dauth_pam=$auth_pam \
         -Dzstd=$zstd -Dseccomp=$seccomp -Dvirtfs=$virtfs -Dcap_ng=$cap_ng \
 Index: pve-qemu-kvm-6.1.0/meson.build
 ===================================================================
 --- pve-qemu-kvm-6.1.0.orig/meson.build
 +++ pve-qemu-kvm-6.1.0/meson.build
@@ -729,6 +729,26 @@ if not get_option('rbd').auto() or have_
   endif
 endif
 +vitastor = not_found
 +if not get_option('vitastor').auto() or have_block
 +  libvitastor_client = cc.find_library('vitastor_client', has_headers: ['vitastor_c.h'],
 +    required: get_option('vitastor'), kwargs: static_kwargs)
 +  if libvitastor_client.found()
 +    if cc.links('''
 +      #include <vitastor_c.h>
 +      int main(void) {
 +        vitastor_c_create_qemu(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
 +        return 0;
 +      }''', dependencies: libvitastor_client)
 +      vitastor = declare_dependency(dependencies: libvitastor_client)
 +    elif get_option('vitastor').enabled()
 +      error('could not link libvitastor_client')
 +    else
 +      warning('could not link libvitastor_client, disabling')
 +    endif
 +  endif
 +endif
 +
 glusterfs = not_found
 glusterfs_ftruncate_has_stat = false
 glusterfs_iocb_has_stat = false
@@ -1268,6 +1288,7 @@ config_host_data.set('CONFIG_LIBNFS', li
 config_host_data.set('CONFIG_LINUX_IO_URING', linux_io_uring.found())
 config_host_data.set('CONFIG_LIBPMEM', libpmem.found())
 config_host_data.set('CONFIG_RBD', rbd.found())
 +config_host_data.set('CONFIG_VITASTOR', vitastor.found())
 config_host_data.set('CONFIG_SDL', sdl.found())
 config_host_data.set('CONFIG_SDL_IMAGE', sdl_image.found())
 config_host_data.set('CONFIG_SECCOMP', seccomp.found())
@@ -3087,6 +3108,7 @@ summary_info += {'bpf support': libbpf.f
 # TODO: add back protocol and server version
 summary_info += {'spice support':     config_host.has_key('CONFIG_SPICE')}
 summary_info += {'rbd support':       rbd.found()}
 +summary_info += {'vitastor support':  vitastor.found()}
 summary_info += {'xfsctl support':    config_host.has_key('CONFIG_XFS')}
 summary_info += {'smartcard support': cacard.found()}
 summary_info += {'U2F support':       u2f.found()}
 Index: pve-qemu-kvm-6.1.0/meson_options.txt
 ===================================================================
 --- pve-qemu-kvm-6.1.0.orig/meson_options.txt
 +++ pve-qemu-kvm-6.1.0/meson_options.txt
@@ -102,6 +102,8 @@ option('lzo', type : 'feature', value :
        description: 'lzo compression support')
 option('rbd', type : 'feature', value : 'auto',
        description: 'Ceph block device driver')
 +option('vitastor', type : 'feature', value : 'auto',
 +       description: 'Vitastor block device driver')
 option('gtk', type : 'feature', value : 'auto',
        description: 'GTK+ user interface')
 option('sdl', type : 'feature', value : 'auto',
--- a/patches/qemu-3.1-vitastor.patch
+++ b/patches/qemu-3.1-vitastor.patch
@ -1,176 +0,0 @@
 diff --git a/block/Makefile.objs b/block/Makefile.objs
 index 46d585cfd0..62222f25fe 100644
 --- a/block/Makefile.objs
 +++ b/block/Makefile.objs
@@ -29,6 +29,7 @@ block-obj-$(if $(CONFIG_LIBISCSI),y,n) += iscsi-opts.o
 block-obj-$(CONFIG_LIBNFS) += nfs.o
 block-obj-$(CONFIG_CURL) += curl.o
 block-obj-$(CONFIG_RBD) += rbd.o
 +block-obj-$(CONFIG_VITASTOR) += vitastor.o
 block-obj-$(CONFIG_GLUSTERFS) += gluster.o
 block-obj-$(CONFIG_VXHS) += vxhs.o
 block-obj-$(CONFIG_LIBSSH2) += ssh.o
@@ -49,6 +50,8 @@ curl.o-cflags      := $(CURL_CFLAGS)
 curl.o-libs        := $(CURL_LIBS)
 rbd.o-cflags       := $(RBD_CFLAGS)
 rbd.o-libs         := $(RBD_LIBS)
 +vitastor.o-cflags  := $(VITASTOR_CFLAGS)
 +vitastor.o-libs    := $(VITASTOR_LIBS)
 gluster.o-cflags   := $(GLUSTERFS_CFLAGS)
 gluster.o-libs     := $(GLUSTERFS_LIBS)
 vxhs.o-libs        := $(VXHS_LIBS)
 diff --git a/configure b/configure
 index 1c9f6090e8..25ef89c33a 100755
 --- a/configure
 +++ b/configure
@@ -422,6 +422,7 @@ trace_backends="log"
 trace_file="trace"
 spice=""
 rbd=""
 +vitastor=""
 smartcard=""
 libusb=""
 usb_redir=""
@@ -1282,6 +1283,10 @@ for opt do
   ;;
   --enable-rbd) rbd="yes"
   ;;
 +  --disable-vitastor) vitastor="no"
 +  ;;
 +  --enable-vitastor) vitastor="yes"
 +  ;;
   --disable-xfsctl) xfs="no"
   ;;
   --enable-xfsctl) xfs="yes"
@@ -1737,6 +1742,7 @@ disabled with --disable-FEATURE, default is enabled if available:
   vhost-crypto    vhost-crypto acceleration support
   spice           spice
   rbd             rados block device (rbd)
 +  vitastor        vitastor block device
   libiscsi        iscsi support
   libnfs          nfs support
   smartcard       smartcard support (libcacard)
@@ -3722,6 +3728,27 @@ EOF
   fi
 fi
 +##########################################
 +# vitastor probe
 +if test "$vitastor" != "no" ; then
 +  cat > $TMPC <<EOF
 +#include <vitastor_c.h>
 +int main(void) {
 +  vitastor_c_create_qemu(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
 +  return 0;
 +}
 +EOF
 +  vitastor_libs="-lvitastor_client"
 +  if compile_prog "" "$vitastor_libs" ; then
 +    vitastor=yes
 +  else
 +    if test "$vitastor" = "yes" ; then
 +      feature_not_found "vitastor block device" "Install vitastor-client-dev"
 +    fi
 +    vitastor=no
 +  fi
 +fi
 +
 ##########################################
 # libssh2 probe
 min_libssh2_version=1.2.8
@@ -6109,6 +6136,7 @@ echo "Trace output file $trace_file-<pid>"
 fi
 echo "spice support     $spice $(echo_version $spice $spice_protocol_version/$spice_server_version)"
 echo "rbd support       $rbd"
 +echo "vitastor support  $vitastor"
 echo "xfsctl support    $xfs"
 echo "smartcard support $smartcard"
 echo "libusb            $libusb"
@@ -6694,6 +6722,11 @@ if test "$rbd" = "yes" ; then
   echo "RBD_CFLAGS=$rbd_cflags" >> $config_host_mak
   echo "RBD_LIBS=$rbd_libs" >> $config_host_mak
 fi
 +if test "$vitastor" = "yes" ; then
 +  echo "CONFIG_VITASTOR=m" >> $config_host_mak
 +  echo "VITASTOR_CFLAGS=$vitastor_cflags" >> $config_host_mak
 +  echo "VITASTOR_LIBS=$vitastor_libs" >> $config_host_mak
 +fi
 echo "CONFIG_COROUTINE_BACKEND=$coroutine" >> $config_host_mak
 if test "$coroutine_pool" = "yes" ; then
 diff --git a/qapi/block-core.json b/qapi/block-core.json
 index d4fe710836..dbad3327b3 100644
 --- a/qapi/block-core.json
 +++ b/qapi/block-core.json
@@ -2617,7 +2617,7 @@
 ##
 { 'enum': 'BlockdevDriver',
   'data': [ 'blkdebug', 'blklogwrites', 'blkverify', 'bochs', 'cloop',
 -            'copy-on-read', 'dmg', 'file', 'ftp', 'ftps', 'gluster',
 +            'copy-on-read', 'dmg', 'file', 'ftp', 'ftps', 'gluster', 'vitastor',
             'host_cdrom', 'host_device', 'http', 'https', 'iscsi', 'luks',
             'nbd', 'nfs', 'null-aio', 'null-co', 'nvme', 'parallels', 'qcow',
             'qcow2', 'qed', 'quorum', 'raw', 'rbd', 'replication', 'sheepdog',
@@ -3366,6 +3366,28 @@
             '*snap-id': 'uint32',
             '*tag': 'str' } }
 +##
 +# @BlockdevOptionsVitastor:
 +#
 +# Driver specific block device options for vitastor
 +#
 +# @image:       Image name
 +# @inode:       Inode number
 +# @pool:        Pool ID
 +# @size:        Desired image size in bytes
 +# @config-path: Path to Vitastor configuration
 +# @etcd-host:   etcd connection address(es)
 +# @etcd-prefix: etcd key/value prefix
 +##
 +{ 'struct': 'BlockdevOptionsVitastor',
 +  'data': { '*inode': 'uint64',
 +            '*pool': 'uint64',
 +            '*size': 'uint64',
 +            '*image': 'str',
 +            '*config-path': 'str',
 +            '*etcd-host': 'str',
 +            '*etcd-prefix': 'str' } }
 +
 ##
 # @ReplicationMode:
 #
@@ -3713,6 +3735,7 @@
       'rbd':        'BlockdevOptionsRbd',
       'replication':'BlockdevOptionsReplication',
       'sheepdog':   'BlockdevOptionsSheepdog',
 +      'vitastor':   'BlockdevOptionsVitastor',
       'ssh':        'BlockdevOptionsSsh',
       'throttle':   'BlockdevOptionsThrottle',
       'vdi':        'BlockdevOptionsGenericFormat',
@@ -4157,6 +4180,17 @@
             '*subformat':           'BlockdevVhdxSubformat',
             '*block-state-zero':    'bool' } }
 +##
 +# @BlockdevCreateOptionsVitastor:
 +#
 +# Driver specific image creation options for Vitastor.
 +#
 +# @size: Size of the virtual disk in bytes
 +##
 +{ 'struct': 'BlockdevCreateOptionsVitastor',
 +  'data': { 'location':         'BlockdevOptionsVitastor',
 +            'size':             'size' } }
 +
 ##
 # @BlockdevVpcSubformat:
 #
@@ -4212,6 +4246,7 @@
       'qed':            'BlockdevCreateOptionsQed',
       'rbd':            'BlockdevCreateOptionsRbd',
       'sheepdog':       'BlockdevCreateOptionsSheepdog',
 +      'vitastor':       'BlockdevCreateOptionsVitastor',
       'ssh':            'BlockdevCreateOptionsSsh',
       'vdi':            'BlockdevCreateOptionsVdi',
       'vhdx':           'BlockdevCreateOptionsVhdx',
--- a/patches/qemu-4.2-vitastor.patch
+++ b/patches/qemu-4.2-vitastor.patch
@ -1,173 +0,0 @@
 diff -NaurpbB qemu-4.2.0/block/Makefile.objs qemu-4.2.0-vitastor/block/Makefile.objs
 --- qemu-4.2.0/block/Makefile.objs	2019-12-12 18:20:47.000000000 +0000
 +++ qemu-4.2.0-vitastor/block/Makefile.objs	2021-12-01 21:28:47.342341760 +0000
@@ -29,6 +29,7 @@ block-obj-$(if $(CONFIG_LIBISCSI),y,n) +
 block-obj-$(CONFIG_LIBNFS) += nfs.o
 block-obj-$(CONFIG_CURL) += curl.o
 block-obj-$(CONFIG_RBD) += rbd.o
 +block-obj-$(CONFIG_VITASTOR) += vitastor.o
 block-obj-$(CONFIG_GLUSTERFS) += gluster.o
 block-obj-$(CONFIG_VXHS) += vxhs.o
 block-obj-$(CONFIG_LIBSSH) += ssh.o
@@ -53,6 +54,8 @@ curl.o-cflags      := $(CURL_CFLAGS)
 curl.o-libs        := $(CURL_LIBS)
 rbd.o-cflags       := $(RBD_CFLAGS)
 rbd.o-libs         := $(RBD_LIBS)
 +vitastor.o-cflags  := $(VITASTOR_CFLAGS)
 +vitastor.o-libs    := $(VITASTOR_LIBS)
 gluster.o-cflags   := $(GLUSTERFS_CFLAGS)
 gluster.o-libs     := $(GLUSTERFS_LIBS)
 vxhs.o-libs        := $(VXHS_LIBS)
 diff -NaurpbB qemu-4.2.0/configure qemu-4.2.0-vitastor/configure
 --- qemu-4.2.0/configure	2019-12-12 18:20:47.000000000 +0000
 +++ qemu-4.2.0-vitastor/configure	2021-12-01 21:30:24.605237562 +0000
@@ -435,6 +435,7 @@ trace_backends="log"
 trace_file="trace"
 spice=""
 rbd=""
 +vitastor=""
 smartcard=""
 libusb=""
 usb_redir=""
@@ -1312,6 +1313,10 @@ for opt do
   ;;
   --enable-rbd) rbd="yes"
   ;;
 +  --disable-vitastor) vitastor="no"
 +  ;;
 +  --enable-vitastor) vitastor="yes"
 +  ;;
   --disable-xfsctl) xfs="no"
   ;;
   --enable-xfsctl) xfs="yes"
@@ -1782,6 +1787,7 @@ disabled with --disable-FEATURE, default
   vhost-user      vhost-user backend support
   spice           spice
   rbd             rados block device (rbd)
 +  vitastor        vitastor block device
   libiscsi        iscsi support
   libnfs          nfs support
   smartcard       smartcard support (libcacard)
@@ -3980,6 +3986,27 @@ EOF
 fi
 ##########################################
 +# vitastor probe
 +if test "$vitastor" != "no" ; then
 +  cat > $TMPC <<EOF
 +#include <vitastor_c.h>
 +int main(void) {
 +  vitastor_c_create_qemu(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
 +  return 0;
 +}
 +EOF
 +  vitastor_libs="-lvitastor_client"
 +  if compile_prog "" "$vitastor_libs" ; then
 +    vitastor=yes
 +  else
 +    if test "$vitastor" = "yes" ; then
 +      feature_not_found "vitastor block device" "Install vitastor-client-dev"
 +    fi
 +    vitastor=no
 +  fi
 +fi
 +
 +##########################################
 # libssh probe
 if test "$libssh" != "no" ; then
   if $pkg_config --exists libssh; then
@@ -6549,6 +6576,7 @@ echo "Trace output file $trace_file-<pid
 fi
 echo "spice support     $spice $(echo_version $spice $spice_protocol_version/$spice_server_version)"
 echo "rbd support       $rbd"
 +echo "vitastor support  $vitastor"
 echo "xfsctl support    $xfs"
 echo "smartcard support $smartcard"
 echo "libusb            $libusb"
@@ -7182,6 +7210,11 @@ if test "$rbd" = "yes" ; then
   echo "RBD_CFLAGS=$rbd_cflags" >> $config_host_mak
   echo "RBD_LIBS=$rbd_libs" >> $config_host_mak
 fi
 +if test "$vitastor" = "yes" ; then
 +  echo "CONFIG_VITASTOR=m" >> $config_host_mak
 +  echo "VITASTOR_CFLAGS=$vitastor_cflags" >> $config_host_mak
 +  echo "VITASTOR_LIBS=$vitastor_libs" >> $config_host_mak
 +fi
 echo "CONFIG_COROUTINE_BACKEND=$coroutine" >> $config_host_mak
 if test "$coroutine_pool" = "yes" ; then
 diff -NaurpbB qemu-4.2.0/qapi/block-core.json qemu-4.2.0-vitastor/qapi/block-core.json
 --- qemu-4.2.0/qapi/block-core.json	2019-12-12 18:20:48.000000000 +0000
 +++ qemu-4.2.0-vitastor/qapi/block-core.json	2021-12-01 21:27:49.213574396 +0000
@@ -2894,7 +2894,7 @@
             'nbd', 'nfs', 'null-aio', 'null-co', 'nvme', 'parallels', 'qcow',
             'qcow2', 'qed', 'quorum', 'raw', 'rbd',
             { 'name': 'replication', 'if': 'defined(CONFIG_REPLICATION)' },
 -            'sheepdog',
 +            'sheepdog', 'vitastor',
             'ssh', 'throttle', 'vdi', 'vhdx', 'vmdk', 'vpc', 'vvfat', 'vxhs' ] }
 ##
@@ -3712,6 +3712,28 @@
             '*tag': 'str' } }
 ##
 +# @BlockdevOptionsVitastor:
 +#
 +# Driver specific block device options for vitastor
 +#
 +# @image:       Image name
 +# @inode:       Inode number
 +# @pool:        Pool ID
 +# @size:        Desired image size in bytes
 +# @config-path: Path to Vitastor configuration
 +# @etcd-host:   etcd connection address(es)
 +# @etcd-prefix: etcd key/value prefix
 +##
 +{ 'struct': 'BlockdevOptionsVitastor',
 +  'data': { '*inode': 'uint64',
 +            '*pool': 'uint64',
 +            '*size': 'uint64',
 +            '*image': 'str',
 +            '*config-path': 'str',
 +            '*etcd-host': 'str',
 +            '*etcd-prefix': 'str' } }
 +
 +##
 # @ReplicationMode:
 #
 # An enumeration of replication modes.
@@ -4071,6 +4093,7 @@
       'replication': { 'type': 'BlockdevOptionsReplication',
                        'if': 'defined(CONFIG_REPLICATION)' },
       'sheepdog':   'BlockdevOptionsSheepdog',
 +      'vitastor':   'BlockdevOptionsVitastor',
       'ssh':        'BlockdevOptionsSsh',
       'throttle':   'BlockdevOptionsThrottle',
       'vdi':        'BlockdevOptionsGenericFormat',
@@ -4441,6 +4464,17 @@
             '*cluster-size' :   'size' } }
 ##
 +# @BlockdevCreateOptionsVitastor:
 +#
 +# Driver specific image creation options for Vitastor.
 +#
 +# @size: Size of the virtual disk in bytes
 +##
 +{ 'struct': 'BlockdevCreateOptionsVitastor',
 +  'data': { 'location':         'BlockdevOptionsVitastor',
 +            'size':             'size' } }
 +
 +##
 # @BlockdevVmdkSubformat:
 #
 # Subformat options for VMDK images
@@ -4702,6 +4736,7 @@
       'qed':            'BlockdevCreateOptionsQed',
       'rbd':            'BlockdevCreateOptionsRbd',
       'sheepdog':       'BlockdevCreateOptionsSheepdog',
 +      'vitastor':       'BlockdevCreateOptionsVitastor',
       'ssh':            'BlockdevCreateOptionsSsh',
       'vdi':            'BlockdevCreateOptionsVdi',
       'vhdx':           'BlockdevCreateOptionsVhdx',
--- a/patches/qemu-5.0-vitastor.patch
+++ b/patches/qemu-5.0-vitastor.patch
@ -1,176 +0,0 @@
 diff --git a/block/Makefile.objs b/block/Makefile.objs
 index 3635b6b4c1..6cdf6df6ff 100644
 --- a/block/Makefile.objs
 +++ b/block/Makefile.objs
@@ -30,6 +30,7 @@ block-obj-$(if $(CONFIG_LIBISCSI),y,n) += iscsi-opts.o
 block-obj-$(CONFIG_LIBNFS) += nfs.o
 block-obj-$(CONFIG_CURL) += curl.o
 block-obj-$(CONFIG_RBD) += rbd.o
 +block-obj-$(CONFIG_VITASTOR) += vitastor.o
 block-obj-$(CONFIG_GLUSTERFS) += gluster.o
 block-obj-$(CONFIG_VXHS) += vxhs.o
 block-obj-$(CONFIG_LIBSSH) += ssh.o
@@ -58,6 +59,8 @@ curl.o-cflags      := $(CURL_CFLAGS)
 curl.o-libs        := $(CURL_LIBS)
 rbd.o-cflags       := $(RBD_CFLAGS)
 rbd.o-libs         := $(RBD_LIBS)
 +vitastor.o-cflags  := $(VITASTOR_CFLAGS)
 +vitastor.o-libs    := $(VITASTOR_LIBS)
 gluster.o-cflags   := $(GLUSTERFS_CFLAGS)
 gluster.o-libs     := $(GLUSTERFS_LIBS)
 vxhs.o-libs        := $(VXHS_LIBS)
 diff --git a/configure b/configure
 index 23b5e93752..7400cb9546 100755
 --- a/configure
 +++ b/configure
@@ -438,6 +438,7 @@ trace_backends="log"
 trace_file="trace"
 spice=""
 rbd=""
 +vitastor=""
 smartcard=""
 libusb=""
 usb_redir=""
@@ -1355,6 +1356,10 @@ for opt do
   ;;
   --enable-rbd) rbd="yes"
   ;;
 +  --disable-vitastor) vitastor="no"
 +  ;;
 +  --enable-vitastor) vitastor="yes"
 +  ;;
   --disable-xfsctl) xfs="no"
   ;;
   --enable-xfsctl) xfs="yes"
@@ -1848,6 +1853,7 @@ disabled with --disable-FEATURE, default is enabled if available:
   vhost-user      vhost-user backend support
   spice           spice
   rbd             rados block device (rbd)
 +  vitastor        vitastor block device
   libiscsi        iscsi support
   libnfs          nfs support
   smartcard       smartcard support (libcacard)
@@ -4088,6 +4094,27 @@ EOF
   fi
 fi
 +##########################################
 +# vitastor probe
 +if test "$vitastor" != "no" ; then
 +  cat > $TMPC <<EOF
 +#include <vitastor_c.h>
 +int main(void) {
 +  vitastor_c_create_qemu(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
 +  return 0;
 +}
 +EOF
 +  vitastor_libs="-lvitastor_client"
 +  if compile_prog "" "$vitastor_libs" ; then
 +    vitastor=yes
 +  else
 +    if test "$vitastor" = "yes" ; then
 +      feature_not_found "vitastor block device" "Install vitastor-client-dev"
 +    fi
 +    vitastor=no
 +  fi
 +fi
 +
 ##########################################
 # libssh probe
 if test "$libssh" != "no" ; then
@@ -6679,6 +6706,7 @@ echo "Trace output file $trace_file-<pid>"
 fi
 echo "spice support     $spice $(echo_version $spice $spice_protocol_version/$spice_server_version)"
 echo "rbd support       $rbd"
 +echo "vitastor support  $vitastor"
 echo "xfsctl support    $xfs"
 echo "smartcard support $smartcard"
 echo "libusb            $libusb"
@@ -7329,6 +7357,11 @@ if test "$rbd" = "yes" ; then
   echo "RBD_CFLAGS=$rbd_cflags" >> $config_host_mak
   echo "RBD_LIBS=$rbd_libs" >> $config_host_mak
 fi
 +if test "$vitastor" = "yes" ; then
 +  echo "CONFIG_VITASTOR=m" >> $config_host_mak
 +  echo "VITASTOR_CFLAGS=$vitastor_cflags" >> $config_host_mak
 +  echo "VITASTOR_LIBS=$vitastor_libs" >> $config_host_mak
 +fi
 echo "CONFIG_COROUTINE_BACKEND=$coroutine" >> $config_host_mak
 if test "$coroutine_pool" = "yes" ; then
 diff --git a/qapi/block-core.json b/qapi/block-core.json
 index 943df1926a..c4f23230a3 100644
 --- a/qapi/block-core.json
 +++ b/qapi/block-core.json
@@ -2798,7 +2798,7 @@
             'luks', 'nbd', 'nfs', 'null-aio', 'null-co', 'nvme', 'parallels',
             'qcow', 'qcow2', 'qed', 'quorum', 'raw', 'rbd',
             { 'name': 'replication', 'if': 'defined(CONFIG_REPLICATION)' },
 -            'sheepdog',
 +            'sheepdog', 'vitastor',
             'ssh', 'throttle', 'vdi', 'vhdx', 'vmdk', 'vpc', 'vvfat', 'vxhs' ] }
 ##
@@ -3634,6 +3634,28 @@
             '*snap-id': 'uint32',
             '*tag': 'str' } }
 +##
 +# @BlockdevOptionsVitastor:
 +#
 +# Driver specific block device options for vitastor
 +#
 +# @image:       Image name
 +# @inode:       Inode number
 +# @pool:        Pool ID
 +# @size:        Desired image size in bytes
 +# @config-path: Path to Vitastor configuration
 +# @etcd-host:   etcd connection address(es)
 +# @etcd-prefix: etcd key/value prefix
 +##
 +{ 'struct': 'BlockdevOptionsVitastor',
 +  'data': { '*inode': 'uint64',
 +            '*pool': 'uint64',
 +            '*size': 'uint64',
 +            '*image': 'str',
 +            '*config-path': 'str',
 +            '*etcd-host': 'str',
 +            '*etcd-prefix': 'str' } }
 +
 ##
 # @ReplicationMode:
 #
@@ -3995,6 +4017,7 @@
       'replication': { 'type': 'BlockdevOptionsReplication',
                        'if': 'defined(CONFIG_REPLICATION)' },
       'sheepdog':   'BlockdevOptionsSheepdog',
 +      'vitastor':   'BlockdevOptionsVitastor',
       'ssh':        'BlockdevOptionsSsh',
       'throttle':   'BlockdevOptionsThrottle',
       'vdi':        'BlockdevOptionsGenericFormat',
@@ -4364,6 +4387,17 @@
             'size':             'size',
             '*cluster-size' :   'size' } }
 +##
 +# @BlockdevCreateOptionsVitastor:
 +#
 +# Driver specific image creation options for Vitastor.
 +#
 +# @size: Size of the virtual disk in bytes
 +##
 +{ 'struct': 'BlockdevCreateOptionsVitastor',
 +  'data': { 'location':         'BlockdevOptionsVitastor',
 +            'size':             'size' } }
 +
 ##
 # @BlockdevVmdkSubformat:
 #
@@ -4626,6 +4660,7 @@
       'qed':            'BlockdevCreateOptionsQed',
       'rbd':            'BlockdevCreateOptionsRbd',
       'sheepdog':       'BlockdevCreateOptionsSheepdog',
 +      'vitastor':       'BlockdevCreateOptionsVitastor',
       'ssh':            'BlockdevCreateOptionsSsh',
       'vdi':            'BlockdevCreateOptionsVdi',
       'vhdx':           'BlockdevCreateOptionsVhdx',
--- a/patches/qemu-5.1-vitastor.patch
+++ b/patches/qemu-5.1-vitastor.patch
@ -1,181 +0,0 @@
 Index: qemu-5.2+dfsg/qapi/block-core.json
 ===================================================================
 --- qemu-5.2+dfsg.orig/qapi/block-core.json
 +++ qemu-5.2+dfsg/qapi/block-core.json
@@ -2831,7 +2831,7 @@
             'luks', 'nbd', 'nfs', 'null-aio', 'null-co', 'nvme', 'parallels',
             'qcow', 'qcow2', 'qed', 'quorum', 'raw', 'rbd',
             { 'name': 'replication', 'if': 'defined(CONFIG_REPLICATION)' },
 -            'sheepdog',
 +            'sheepdog', 'vitastor',
             'ssh', 'throttle', 'vdi', 'vhdx', 'vmdk', 'vpc', 'vvfat' ] }
 ##
@@ -3668,6 +3668,28 @@
             '*tag': 'str' } }
 ##
 +# @BlockdevOptionsVitastor:
 +#
 +# Driver specific block device options for vitastor
 +#
 +# @image:       Image name
 +# @inode:       Inode number
 +# @pool:        Pool ID
 +# @size:        Desired image size in bytes
 +# @config-path: Path to Vitastor configuration
 +# @etcd-host:   etcd connection address(es)
 +# @etcd-prefix: etcd key/value prefix
 +##
 +{ 'struct': 'BlockdevOptionsVitastor',
 +  'data': { '*inode': 'uint64',
 +            '*pool': 'uint64',
 +            '*size': 'uint64',
 +            '*image': 'str',
 +            '*config-path': 'str',
 +            '*etcd-host': 'str',
 +            '*etcd-prefix': 'str' } }
 +
 +##
 # @ReplicationMode:
 #
 # An enumeration of replication modes.
@@ -4015,6 +4037,7 @@
       'replication': { 'type': 'BlockdevOptionsReplication',
                        'if': 'defined(CONFIG_REPLICATION)' },
       'sheepdog':   'BlockdevOptionsSheepdog',
 +      'vitastor':   'BlockdevOptionsVitastor',
       'ssh':        'BlockdevOptionsSsh',
       'throttle':   'BlockdevOptionsThrottle',
       'vdi':        'BlockdevOptionsGenericFormat',
@@ -4404,6 +4427,17 @@
             '*cluster-size' :   'size' } }
 ##
 +# @BlockdevCreateOptionsVitastor:
 +#
 +# Driver specific image creation options for Vitastor.
 +#
 +# @size: Size of the virtual disk in bytes
 +##
 +{ 'struct': 'BlockdevCreateOptionsVitastor',
 +  'data': { 'location':         'BlockdevOptionsVitastor',
 +            'size':             'size' } }
 +
 +##
 # @BlockdevVmdkSubformat:
 #
 # Subformat options for VMDK images
@@ -4665,6 +4699,7 @@
       'qed':            'BlockdevCreateOptionsQed',
       'rbd':            'BlockdevCreateOptionsRbd',
       'sheepdog':       'BlockdevCreateOptionsSheepdog',
 +      'vitastor':       'BlockdevCreateOptionsVitastor',
       'ssh':            'BlockdevCreateOptionsSsh',
       'vdi':            'BlockdevCreateOptionsVdi',
       'vhdx':           'BlockdevCreateOptionsVhdx',
 Index: qemu-5.2+dfsg/block/meson.build
 ===================================================================
 --- qemu-5.2+dfsg.orig/block/meson.build
 +++ qemu-5.2+dfsg/block/meson.build
@@ -76,6 +76,7 @@ foreach m : [
   ['CONFIG_LIBNFS', 'nfs', libnfs, 'nfs.c'],
   ['CONFIG_LIBSSH', 'ssh', libssh, 'ssh.c'],
   ['CONFIG_RBD', 'rbd', rbd, 'rbd.c'],
 +  ['CONFIG_VITASTOR', 'vitastor', vitastor, 'vitastor.c'],
 ]
   if config_host.has_key(m[0])
     if enable_modules
 Index: qemu-5.2+dfsg/configure
 ===================================================================
 --- qemu-5.2+dfsg.orig/configure
 +++ qemu-5.2+dfsg/configure
@@ -372,6 +372,7 @@ trace_backends="log"
 trace_file="trace"
 spice=""
 rbd=""
 +vitastor=""
 smartcard=""
 u2f="auto"
 libusb=""
@@ -1263,6 +1264,10 @@ for opt do
   ;;
   --enable-rbd) rbd="yes"
   ;;
 +  --disable-vitastor) vitastor="no"
 +  ;;
 +  --enable-vitastor) vitastor="yes"
 +  ;;
   --disable-xfsctl) xfs="no"
   ;;
   --enable-xfsctl) xfs="yes"
@@ -1827,6 +1832,7 @@ disabled with --disable-FEATURE, default
   vhost-vdpa      vhost-vdpa kernel backend support
   spice           spice
   rbd             rados block device (rbd)
 +  vitastor        vitastor block device
   libiscsi        iscsi support
   libnfs          nfs support
   smartcard       smartcard support (libcacard)
@@ -3719,6 +3725,27 @@ EOF
 fi
 ##########################################
 +# vitastor probe
 +if test "$vitastor" != "no" ; then
 +  cat > $TMPC <<EOF
 +#include <vitastor_c.h>
 +int main(void) {
 +  vitastor_c_create_qemu(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
 +  return 0;
 +}
 +EOF
 +  vitastor_libs="-lvitastor_client"
 +  if compile_prog "" "$vitastor_libs" ; then
 +    vitastor=yes
 +  else
 +    if test "$vitastor" = "yes" ; then
 +      feature_not_found "vitastor block device" "Install vitastor-client-dev"
 +    fi
 +    vitastor=no
 +  fi
 +fi
 +
 +##########################################
 # libssh probe
 if test "$libssh" != "no" ; then
   if $pkg_config --exists libssh; then
@@ -6456,6 +6483,10 @@ if test "$rbd" = "yes" ; then
   echo "CONFIG_RBD=y" >> $config_host_mak
   echo "RBD_LIBS=$rbd_libs" >> $config_host_mak
 fi
 +if test "$vitastor" = "yes" ; then
 +  echo "CONFIG_VITASTOR=y" >> $config_host_mak
 +  echo "VITASTOR_LIBS=$vitastor_libs" >> $config_host_mak
 +fi
 echo "CONFIG_COROUTINE_BACKEND=$coroutine" >> $config_host_mak
 if test "$coroutine_pool" = "yes" ; then
 Index: qemu-5.2+dfsg/meson.build
 ===================================================================
 --- qemu-5.2+dfsg.orig/meson.build
 +++ qemu-5.2+dfsg/meson.build
@@ -596,6 +596,10 @@ rbd = not_found
 if 'CONFIG_RBD' in config_host
   rbd = declare_dependency(link_args: config_host['RBD_LIBS'].split())
 endif
 +vitastor = not_found
 +if 'CONFIG_VITASTOR' in config_host
 +  vitastor = declare_dependency(link_args: config_host['VITASTOR_LIBS'].split())
 +endif
 glusterfs = not_found
 if 'CONFIG_GLUSTERFS' in config_host
   glusterfs = declare_dependency(compile_args: config_host['GLUSTERFS_CFLAGS'].split(),
@@ -2145,6 +2149,7 @@ endif
 # TODO: add back protocol and server version
 summary_info += {'spice support':     config_host.has_key('CONFIG_SPICE')}
 summary_info += {'rbd support':       config_host.has_key('CONFIG_RBD')}
 +summary_info += {'vitastor support':  config_host.has_key('CONFIG_VITASTOR')}
 summary_info += {'xfsctl support':    config_host.has_key('CONFIG_XFS')}
 summary_info += {'smartcard support': config_host.has_key('CONFIG_SMARTCARD')}
 summary_info += {'U2F support':       u2f.found()}
--- a/patches/qemu-6.0-vitastor.patch
+++ b/patches/qemu-6.0-vitastor.patch
@ -1,188 +0,0 @@
 diff --git a/block/meson.build b/block/meson.build
 index d21990ec95..385ac37732 100644
 --- a/block/meson.build
 +++ b/block/meson.build
@@ -78,6 +78,7 @@ foreach m : [
   [libnfs, 'nfs', libnfs, 'nfs.c'],
   [libssh, 'ssh', libssh, 'ssh.c'],
   [rbd, 'rbd', rbd, 'rbd.c'],
 +  [vitastor, 'vitastor', vitastor, 'vitastor.c'],
 ]
   if m[0].found()
     if enable_modules
 diff --git a/configure b/configure
 index c77f7b1020..5f534e8484 100755
 --- a/configure
 +++ b/configure
@@ -389,6 +389,7 @@ trace_backends="log"
 trace_file="trace"
 spice="$default_feature"
 rbd="auto"
 +vitastor="auto"
 smartcard="$default_feature"
 u2f="auto"
 libusb="$default_feature"
@@ -1280,6 +1281,10 @@ for opt do
   ;;
   --enable-rbd) rbd="enabled"
   ;;
 +  --disable-vitastor) vitastor="disabled"
 +  ;;
 +  --enable-vitastor) vitastor="enabled"
 +  ;;
   --disable-xfsctl) xfs="no"
   ;;
   --enable-xfsctl) xfs="yes"
@@ -1867,6 +1872,7 @@ disabled with --disable-FEATURE, default is enabled if available
   vhost-vdpa      vhost-vdpa kernel backend support
   spice           spice
   rbd             rados block device (rbd)
 +  vitastor        vitastor block device
   libiscsi        iscsi support
   libnfs          nfs support
   smartcard       smartcard support (libcacard)
@@ -6423,7 +6429,7 @@ NINJA=$ninja $meson setup \
         -Dcapstone=$capstone -Dslirp=$slirp -Dfdt=$fdt -Dbrlapi=$brlapi \
         -Dcurl=$curl -Dglusterfs=$glusterfs -Dbzip2=$bzip2 -Dlibiscsi=$libiscsi \
         -Dlibnfs=$libnfs -Diconv=$iconv -Dcurses=$curses -Dlibudev=$libudev\
 -        -Drbd=$rbd -Dlzo=$lzo -Dsnappy=$snappy -Dlzfse=$lzfse \
 +        -Drbd=$rbd -Dvitastor=$vitastor -Dlzo=$lzo -Dsnappy=$snappy -Dlzfse=$lzfse \
         -Dzstd=$zstd -Dseccomp=$seccomp -Dvirtfs=$virtfs -Dcap_ng=$cap_ng \
         -Dattr=$attr -Ddefault_devices=$default_devices \
         -Ddocs=$docs -Dsphinx_build=$sphinx_build -Dinstall_blobs=$blobs \
 diff --git a/meson.build b/meson.build
 index c6f4b0cf5e..3dc7f7b463 100644
 --- a/meson.build
 +++ b/meson.build
@@ -720,6 +720,26 @@ if not get_option('rbd').auto() or have_block
   endif
 endif
 +vitastor = not_found
 +if not get_option('vitastor').auto() or have_block
 +  libvitastor_client = cc.find_library('vitastor_client', has_headers: ['vitastor_c.h'],
 +    required: get_option('vitastor'), kwargs: static_kwargs)
 +  if libvitastor_client.found()
 +    if cc.links('''
 +      #include <vitastor_c.h>
 +      int main(void) {
 +        vitastor_c_create_qemu(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
 +        return 0;
 +      }''', dependencies: libvitastor_client)
 +      vitastor = declare_dependency(dependencies: libvitastor_client)
 +    elif get_option('vitastor').enabled()
 +      error('could not link libvitastor_client')
 +    else
 +      warning('could not link libvitastor_client, disabling')
 +    endif
 +  endif
 +endif
 +
 glusterfs = not_found
 glusterfs_ftruncate_has_stat = false
 glusterfs_iocb_has_stat = false
@@ -1118,6 +1138,7 @@ config_host_data.set('CONFIG_LIBCAP_NG', libcap_ng.found())
 config_host_data.set('CONFIG_LIBISCSI', libiscsi.found())
 config_host_data.set('CONFIG_LIBNFS', libnfs.found())
 config_host_data.set('CONFIG_RBD', rbd.found())
 +config_host_data.set('CONFIG_VITASTOR', vitastor.found())
 config_host_data.set('CONFIG_SDL', sdl.found())
 config_host_data.set('CONFIG_SDL_IMAGE', sdl_image.found())
 config_host_data.set('CONFIG_SECCOMP', seccomp.found())
@@ -2683,6 +2704,7 @@ summary_info += {'libcap-ng support': libcap_ng.found()}
 # TODO: add back protocol and server version
 summary_info += {'spice support':     config_host.has_key('CONFIG_SPICE')}
 summary_info += {'rbd support':       rbd.found()}
 +summary_info += {'vitastor support':  vitastor.found()}
 summary_info += {'xfsctl support':    config_host.has_key('CONFIG_XFS')}
 summary_info += {'smartcard support': config_host.has_key('CONFIG_SMARTCARD')}
 summary_info += {'U2F support':       u2f.found()}
 diff --git a/meson_options.txt b/meson_options.txt
 index 9734019995..bc93963b27 100644
 --- a/meson_options.txt
 +++ b/meson_options.txt
@@ -80,6 +80,8 @@ option('lzo', type : 'feature', value : 'auto',
        description: 'lzo compression support')
 option('rbd', type : 'feature', value : 'auto',
        description: 'Ceph block device driver')
 +option('vitastor', type : 'feature', value : 'auto',
 +       description: 'Vitastor block device driver')
 option('gtk', type : 'feature', value : 'auto',
        description: 'GTK+ user interface')
 option('sdl', type : 'feature', value : 'auto',
 diff --git a/qapi/block-core.json b/qapi/block-core.json
 index 6d227924d0..d14b29aa43 100644
 --- a/qapi/block-core.json
 +++ b/qapi/block-core.json
@@ -2819,7 +2819,7 @@
             'preallocate', 'qcow', 'qcow2', 'qed', 'quorum', 'raw', 'rbd',
             { 'name': 'replication', 'if': 'defined(CONFIG_REPLICATION)' },
             'sheepdog',
 -            'ssh', 'throttle', 'vdi', 'vhdx', 'vmdk', 'vpc', 'vvfat' ] }
 +            'ssh', 'throttle', 'vdi', 'vhdx', 'vitastor', 'vmdk', 'vpc', 'vvfat' ] }
 ##
 # @BlockdevOptionsFile:
@@ -3671,6 +3671,28 @@
             '*snap-id': 'uint32',
             '*tag': 'str' } }
 +##
 +# @BlockdevOptionsVitastor:
 +#
 +# Driver specific block device options for vitastor
 +#
 +# @image:       Image name
 +# @inode:       Inode number
 +# @pool:        Pool ID
 +# @size:        Desired image size in bytes
 +# @config-path: Path to Vitastor configuration
 +# @etcd-host:   etcd connection address(es)
 +# @etcd-prefix: etcd key/value prefix
 +##
 +{ 'struct': 'BlockdevOptionsVitastor',
 +  'data': { '*inode': 'uint64',
 +            '*pool': 'uint64',
 +            '*size': 'uint64',
 +            '*image': 'str',
 +            '*config-path': 'str',
 +            '*etcd-host': 'str',
 +            '*etcd-prefix': 'str' } }
 +
 ##
 # @ReplicationMode:
 #
@@ -4042,6 +4064,7 @@
       'throttle':   'BlockdevOptionsThrottle',
       'vdi':        'BlockdevOptionsGenericFormat',
       'vhdx':       'BlockdevOptionsGenericFormat',
 +      'vitastor':   'BlockdevOptionsVitastor',
       'vmdk':       'BlockdevOptionsGenericCOWFormat',
       'vpc':        'BlockdevOptionsGenericFormat',
       'vvfat':      'BlockdevOptionsVVFAT'
@@ -4426,6 +4449,17 @@
             'size':             'size',
             '*cluster-size' :   'size' } }
 +##
 +# @BlockdevCreateOptionsVitastor:
 +#
 +# Driver specific image creation options for Vitastor.
 +#
 +# @size: Size of the virtual disk in bytes
 +##
 +{ 'struct': 'BlockdevCreateOptionsVitastor',
 +  'data': { 'location':         'BlockdevOptionsVitastor',
 +            'size':             'size' } }
 +
 ##
 # @BlockdevVmdkSubformat:
 #
@@ -4691,6 +4725,7 @@
       'ssh':            'BlockdevCreateOptionsSsh',
       'vdi':            'BlockdevCreateOptionsVdi',
       'vhdx':           'BlockdevCreateOptionsVhdx',
 +      'vitastor':       'BlockdevCreateOptionsVitastor',
       'vmdk':           'BlockdevCreateOptionsVmdk',
       'vpc':            'BlockdevCreateOptionsVpc'
   } }
--- a/patches/qemu-6.1-vitastor.patch
+++ b/patches/qemu-6.1-vitastor.patch
@ -1,188 +0,0 @@
 Index: qemu-6.1+dfsg/qapi/block-core.json
 ===================================================================
 --- qemu-6.1+dfsg.orig/qapi/block-core.json
 +++ qemu-6.1+dfsg/qapi/block-core.json
@@ -2838,7 +2838,7 @@
             'luks', 'nbd', 'nfs', 'null-aio', 'null-co', 'nvme', 'parallels',
             'preallocate', 'qcow', 'qcow2', 'qed', 'quorum', 'raw', 'rbd',
             { 'name': 'replication', 'if': 'defined(CONFIG_REPLICATION)' },
 -            'ssh', 'throttle', 'vdi', 'vhdx', 'vmdk', 'vpc', 'vvfat' ] }
 +            'ssh', 'throttle', 'vdi', 'vhdx', 'vitastor', 'vmdk', 'vpc', 'vvfat' ] }
 ##
 # @BlockdevOptionsFile:
@@ -3763,6 +3763,28 @@
             '*server': ['InetSocketAddressBase'] } }
 ##
 +# @BlockdevOptionsVitastor:
 +#
 +# Driver specific block device options for vitastor
 +#
 +# @image:       Image name
 +# @inode:       Inode number
 +# @pool:        Pool ID
 +# @size:        Desired image size in bytes
 +# @config-path: Path to Vitastor configuration
 +# @etcd-host:   etcd connection address(es)
 +# @etcd-prefix: etcd key/value prefix
 +##
 +{ 'struct': 'BlockdevOptionsVitastor',
 +  'data': { '*inode': 'uint64',
 +            '*pool': 'uint64',
 +            '*size': 'uint64',
 +            '*image': 'str',
 +            '*config-path': 'str',
 +            '*etcd-host': 'str',
 +            '*etcd-prefix': 'str' } }
 +
 +##
 # @ReplicationMode:
 #
 # An enumeration of replication modes.
@@ -4134,6 +4156,7 @@
       'throttle':   'BlockdevOptionsThrottle',
       'vdi':        'BlockdevOptionsGenericFormat',
       'vhdx':       'BlockdevOptionsGenericFormat',
 +      'vitastor':   'BlockdevOptionsVitastor',
       'vmdk':       'BlockdevOptionsGenericCOWFormat',
       'vpc':        'BlockdevOptionsGenericFormat',
       'vvfat':      'BlockdevOptionsVVFAT'
@@ -4523,6 +4546,17 @@
             '*encrypt' :        'RbdEncryptionCreateOptions' } }
 ##
 +# @BlockdevCreateOptionsVitastor:
 +#
 +# Driver specific image creation options for Vitastor.
 +#
 +# @size: Size of the virtual disk in bytes
 +##
 +{ 'struct': 'BlockdevCreateOptionsVitastor',
 +  'data': { 'location':         'BlockdevOptionsVitastor',
 +            'size':             'size' } }
 +
 +##
 # @BlockdevVmdkSubformat:
 #
 # Subformat options for VMDK images
@@ -4718,6 +4752,7 @@
       'ssh':            'BlockdevCreateOptionsSsh',
       'vdi':            'BlockdevCreateOptionsVdi',
       'vhdx':           'BlockdevCreateOptionsVhdx',
 +      'vitastor':       'BlockdevCreateOptionsVitastor',
       'vmdk':           'BlockdevCreateOptionsVmdk',
       'vpc':            'BlockdevCreateOptionsVpc'
   } }
 Index: qemu-6.1+dfsg/block/meson.build
 ===================================================================
 --- qemu-6.1+dfsg.orig/block/meson.build
 +++ qemu-6.1+dfsg/block/meson.build
@@ -78,6 +78,7 @@ foreach m : [
   [libnfs, 'nfs', files('nfs.c')],
   [libssh, 'ssh', files('ssh.c')],
   [rbd, 'rbd', files('rbd.c')],
 +  [vitastor, 'vitastor', files('vitastor.c')],
 ]
   if m[0].found()
     module_ss = ss.source_set()
 Index: qemu-6.1+dfsg/configure
 ===================================================================
 --- qemu-6.1+dfsg.orig/configure
 +++ qemu-6.1+dfsg/configure
@@ -375,6 +375,7 @@ trace_file="trace"
 spice="$default_feature"
 spice_protocol="auto"
 rbd="auto"
 +vitastor="auto"
 smartcard="auto"
 u2f="auto"
 libusb="auto"
@@ -1292,6 +1293,10 @@ for opt do
   ;;
   --enable-rbd) rbd="enabled"
   ;;
 +  --disable-vitastor) vitastor="disabled"
 +  ;;
 +  --enable-vitastor) vitastor="enabled"
 +  ;;
   --disable-xfsctl) xfs="no"
   ;;
   --enable-xfsctl) xfs="yes"
@@ -1916,6 +1921,7 @@ disabled with --disable-FEATURE, default
   spice           spice
   spice-protocol  spice-protocol
   rbd             rados block device (rbd)
 +  vitastor        vitastor block device
   libiscsi        iscsi support
   libnfs          nfs support
   smartcard       smartcard support (libcacard)
@@ -5202,7 +5208,7 @@ if test "$skip_meson" = no; then
         -Dcapstone=$capstone -Dslirp=$slirp -Dfdt=$fdt -Dbrlapi=$brlapi \
         -Dcurl=$curl -Dglusterfs=$glusterfs -Dbzip2=$bzip2 -Dlibiscsi=$libiscsi \
         -Dlibnfs=$libnfs -Diconv=$iconv -Dcurses=$curses -Dlibudev=$libudev\
 -        -Drbd=$rbd -Dlzo=$lzo -Dsnappy=$snappy -Dlzfse=$lzfse -Dlibxml2=$libxml2 \
 +        -Drbd=$rbd -Dvitastor=$vitastor -Dlzo=$lzo -Dsnappy=$snappy -Dlzfse=$lzfse -Dlibxml2=$libxml2 \
         -Dlibdaxctl=$libdaxctl -Dlibpmem=$libpmem -Dlinux_io_uring=$linux_io_uring \
         -Dgnutls=$gnutls -Dnettle=$nettle -Dgcrypt=$gcrypt -Dauth_pam=$auth_pam \
         -Dzstd=$zstd -Dseccomp=$seccomp -Dvirtfs=$virtfs -Dcap_ng=$cap_ng \
 Index: qemu-6.1+dfsg/meson.build
 ===================================================================
 --- qemu-6.1+dfsg.orig/meson.build
 +++ qemu-6.1+dfsg/meson.build
@@ -729,6 +729,26 @@ if not get_option('rbd').auto() or have_
   endif
 endif
 +vitastor = not_found
 +if not get_option('vitastor').auto() or have_block
 +  libvitastor_client = cc.find_library('vitastor_client', has_headers: ['vitastor_c.h'],
 +    required: get_option('vitastor'), kwargs: static_kwargs)
 +  if libvitastor_client.found()
 +    if cc.links('''
 +      #include <vitastor_c.h>
 +      int main(void) {
 +        vitastor_c_create_qemu(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
 +        return 0;
 +      }''', dependencies: libvitastor_client)
 +      vitastor = declare_dependency(dependencies: libvitastor_client)
 +    elif get_option('vitastor').enabled()
 +      error('could not link libvitastor_client')
 +    else
 +      warning('could not link libvitastor_client, disabling')
 +    endif
 +  endif
 +endif
 +
 glusterfs = not_found
 glusterfs_ftruncate_has_stat = false
 glusterfs_iocb_has_stat = false
@@ -1264,6 +1284,7 @@ config_host_data.set('CONFIG_LIBNFS', li
 config_host_data.set('CONFIG_LINUX_IO_URING', linux_io_uring.found())
 config_host_data.set('CONFIG_LIBPMEM', libpmem.found())
 config_host_data.set('CONFIG_RBD', rbd.found())
 +config_host_data.set('CONFIG_VITASTOR', vitastor.found())
 config_host_data.set('CONFIG_SDL', sdl.found())
 config_host_data.set('CONFIG_SDL_IMAGE', sdl_image.found())
 config_host_data.set('CONFIG_SECCOMP', seccomp.found())
@@ -3075,6 +3096,7 @@ summary_info += {'bpf support': libbpf.f
 # TODO: add back protocol and server version
 summary_info += {'spice support':     config_host.has_key('CONFIG_SPICE')}
 summary_info += {'rbd support':       rbd.found()}
 +summary_info += {'vitastor support':  vitastor.found()}
 summary_info += {'xfsctl support':    config_host.has_key('CONFIG_XFS')}
 summary_info += {'smartcard support': cacard.found()}
 summary_info += {'U2F support':       u2f.found()}
 Index: qemu-6.1+dfsg/meson_options.txt
 ===================================================================
 --- qemu-6.1+dfsg.orig/meson_options.txt
 +++ qemu-6.1+dfsg/meson_options.txt
@@ -102,6 +102,8 @@ option('lzo', type : 'feature', value :
        description: 'lzo compression support')
 option('rbd', type : 'feature', value : 'auto',
        description: 'Ceph block device driver')
 +option('vitastor', type : 'feature', value : 'auto',
 +       description: 'Vitastor block device driver')
 option('gtk', type : 'feature', value : 'auto',
        description: 'GTK+ user interface')
 option('sdl', type : 'feature', value : 'auto',
--- a/patches/qemu-make-patches.sh
+++ b/patches/qemu-make-patches.sh
@ -1,15 +0,0 @@
 #!/bin/bash
 # QEMU patches don't include the `block/vitastor.c` file to not duplicate it in sources
 # Run this script to append its creation to all QEMU patches
 DIR=$(dirname $0)
 for i in "$DIR"/qemu-*-vitastor.patch "$DIR"/pve-qemu-*-vitastor.patch; do
    if ! grep -qP '^\+\+\+ .*block/vitastor\.c' $i; then
        echo 'Index: a/block/vitastor.c' >> $i
        echo '===================================================================' >> $i
        echo '--- /dev/null' >> $i
        echo '+++ a/block/vitastor.c' >> $i
        echo '@@ -0,0 +1,'$(wc -l "$DIR"/../src/qemu_driver.c)' @@' >> $i
        cat "$DIR"/../src/qemu_driver.c | sed 's/^/+/' >> $i
    fi
 done
--- a/qemu-3.1-vitastor.patch
+++ b/qemu-3.1-vitastor.patch
@ -0,0 +1,88 @@
 Index: qemu-3.1+dfsg/qapi/block-core.json
 ===================================================================
 --- qemu-3.1+dfsg.orig/qapi/block-core.json
 +++ qemu-3.1+dfsg/qapi/block-core.json
@@ -2617,7 +2617,7 @@
 ##
 { 'enum': 'BlockdevDriver',
   'data': [ 'blkdebug', 'blklogwrites', 'blkverify', 'bochs', 'cloop',
 -            'copy-on-read', 'dmg', 'file', 'ftp', 'ftps', 'gluster',
 +            'copy-on-read', 'dmg', 'file', 'ftp', 'ftps', 'gluster', 'vitastor',
             'host_cdrom', 'host_device', 'http', 'https', 'iscsi', 'luks',
             'nbd', 'nfs', 'null-aio', 'null-co', 'nvme', 'parallels', 'qcow',
             'qcow2', 'qed', 'quorum', 'raw', 'rbd', 'replication', 'sheepdog',
@@ -3367,6 +3367,28 @@
             '*tag': 'str' } }
 ##
 +# @BlockdevOptionsVitastor:
 +#
 +# Driver specific block device options for vitastor
 +#
 +# @image:       Image name
 +# @inode:       Inode number
 +# @pool:        Pool ID
 +# @size:        Desired image size in bytes
 +# @config_path: Path to Vitastor configuration
 +# @etcd_address: etcd connection address(es)
 +# @etcd_prefix: etcd key/value prefix
 +##
 +{ 'struct': 'BlockdevOptionsVitastor',
 +  'data': { '*inode': 'uint64',
 +            '*pool': 'uint64',
 +            '*size': 'uint64',
 +            '*image': 'str',
 +            '*config_path': 'str',
 +            '*etcd_address': 'str',
 +            '*etcd_prefix': 'str' } }
 +
 +##
 # @ReplicationMode:
 #
 # An enumeration of replication modes.
@@ -3713,6 +3731,7 @@
       'rbd':        'BlockdevOptionsRbd',
       'replication':'BlockdevOptionsReplication',
       'sheepdog':   'BlockdevOptionsSheepdog',
 +      'vitastor':   'BlockdevOptionsVitastor',
       'ssh':        'BlockdevOptionsSsh',
       'throttle':   'BlockdevOptionsThrottle',
       'vdi':        'BlockdevOptionsGenericFormat',
@@ -4158,6 +4177,17 @@
             '*block-state-zero':    'bool' } }
 ##
 +# @BlockdevCreateOptionsVitastor:
 +#
 +# Driver specific image creation options for Vitastor.
 +#
 +# @size: Size of the virtual disk in bytes
 +##
 +{ 'struct': 'BlockdevCreateOptionsVitastor',
 +  'data': { 'location':         'BlockdevOptionsVitastor',
 +            'size':             'size' } }
 +
 +##
 # @BlockdevVpcSubformat:
 #
 # @dynamic: Growing image file
@@ -4212,6 +4242,7 @@
       'qed':            'BlockdevCreateOptionsQed',
       'rbd':            'BlockdevCreateOptionsRbd',
       'sheepdog':       'BlockdevCreateOptionsSheepdog',
 +      'vitastor':       'BlockdevCreateOptionsVitastor',
       'ssh':            'BlockdevCreateOptionsSsh',
       'vdi':            'BlockdevCreateOptionsVdi',
       'vhdx':           'BlockdevCreateOptionsVhdx',
 Index: qemu-3.1+dfsg/scripts/modules/module_block.py
 ===================================================================
 --- qemu-3.1+dfsg.orig/scripts/modules/module_block.py
 +++ qemu-3.1+dfsg/scripts/modules/module_block.py
@@ -88,6 +88,7 @@ def print_bottom(fheader):
 output_file = sys.argv[1]
 with open(output_file, 'w') as fheader:
     print_top(fheader)
 +    add_module(fheader, "vitastor", "vitastor", "vitastor")
     for filename in sys.argv[2:]:
         if os.path.isfile(filename):
--- a/qemu-4.2-vitastor.patch
+++ b/qemu-4.2-vitastor.patch
@ -0,0 +1,88 @@
 Index: qemu/qapi/block-core.json
 ===================================================================
 --- qemu.orig/qapi/block-core.json	2020-11-07 22:57:38.932613674 +0000
 +++ qemu.orig/qapi/block-core.json	2020-11-07 22:59:49.890722862 +0000
@@ -2907,7 +2907,7 @@
             'nbd', 'nfs', 'null-aio', 'null-co', 'nvme', 'parallels', 'qcow',
             'qcow2', 'qed', 'quorum', 'raw', 'rbd',
             { 'name': 'replication', 'if': 'defined(CONFIG_REPLICATION)' },
 -            'sheepdog',
 +            'sheepdog', 'vitastor',
             'ssh', 'throttle', 'vdi', 'vhdx', 'vmdk', 'vpc', 'vvfat', 'vxhs' ] }
 ##
@@ -3725,6 +3725,28 @@
             '*tag': 'str' } }
 ##
 +# @BlockdevOptionsVitastor:
 +#
 +# Driver specific block device options for vitastor
 +#
 +# @image:       Image name
 +# @inode:       Inode number
 +# @pool:        Pool ID
 +# @size:        Desired image size in bytes
 +# @config_path: Path to Vitastor configuration
 +# @etcd_address: etcd connection address(es)
 +# @etcd_prefix: etcd key/value prefix
 +##
 +{ 'struct': 'BlockdevOptionsVitastor',
 +  'data': { '*inode': 'uint64',
 +            '*pool': 'uint64',
 +            '*size': 'uint64',
 +            '*image': 'str',
 +            '*config_path': 'str',
 +            '*etcd_address': 'str',
 +            '*etcd_prefix': 'str' } }
 +
 +##
 # @ReplicationMode:
 #
 # An enumeration of replication modes.
@@ -4084,6 +4102,7 @@
       'replication': { 'type': 'BlockdevOptionsReplication',
                        'if': 'defined(CONFIG_REPLICATION)' },
       'sheepdog':   'BlockdevOptionsSheepdog',
 +      'vitastor':   'BlockdevOptionsVitastor',
       'ssh':        'BlockdevOptionsSsh',
       'throttle':   'BlockdevOptionsThrottle',
       'vdi':        'BlockdevOptionsGenericFormat',
@@ -4461,6 +4480,17 @@
             '*cluster-size' :   'size' } }
 ##
 +# @BlockdevCreateOptionsVitastor:
 +#
 +# Driver specific image creation options for Vitastor.
 +#
 +# @size: Size of the virtual disk in bytes
 +##
 +{ 'struct': 'BlockdevCreateOptionsVitastor',
 +  'data': { 'location':         'BlockdevOptionsVitastor',
 +            'size':             'size' } }
 +
 +##
 # @BlockdevVmdkSubformat:
 #
 # Subformat options for VMDK images
@@ -4722,6 +4752,7 @@
       'qed':            'BlockdevCreateOptionsQed',
       'rbd':            'BlockdevCreateOptionsRbd',
       'sheepdog':       'BlockdevCreateOptionsSheepdog',
 +      'vitastor':       'BlockdevCreateOptionsVitastor',
       'ssh':            'BlockdevCreateOptionsSsh',
       'vdi':            'BlockdevCreateOptionsVdi',
       'vhdx':           'BlockdevCreateOptionsVhdx',
 Index: qemu/scripts/modules/module_block.py
 ===================================================================
 --- qemu.orig/scripts/modules/module_block.py	2020-11-07 22:57:38.936613739 +0000
 +++ qemu/scripts/modules/module_block.py	2020-11-07 22:59:49.890722862 +0000
@@ -86,6 +86,7 @@ def print_bottom(fheader):
 output_file = sys.argv[1]
 with open(output_file, 'w') as fheader:
     print_top(fheader)
 +    add_module(fheader, "vitastor", "vitastor", "vitastor")
     for filename in sys.argv[2:]:
         if os.path.isfile(filename):
--- a/qemu-5.0-vitastor.patch
+++ b/qemu-5.0-vitastor.patch
@ -0,0 +1,88 @@
 Index: qemu/qapi/block-core.json
 ===================================================================
 --- qemu.orig/qapi/block-core.json
 +++ qemu/qapi/block-core.json
@@ -2798,7 +2798,7 @@
             'luks', 'nbd', 'nfs', 'null-aio', 'null-co', 'nvme', 'parallels',
             'qcow', 'qcow2', 'qed', 'quorum', 'raw', 'rbd',
             { 'name': 'replication', 'if': 'defined(CONFIG_REPLICATION)' },
 -            'sheepdog',
 +            'sheepdog', 'vitastor',
             'ssh', 'throttle', 'vdi', 'vhdx', 'vmdk', 'vpc', 'vvfat', 'vxhs' ] }
 ##
@@ -3635,6 +3635,28 @@
             '*tag': 'str' } }
 ##
 +# @BlockdevOptionsVitastor:
 +#
 +# Driver specific block device options for vitastor
 +#
 +# @image:       Image name
 +# @inode:       Inode number
 +# @pool:        Pool ID
 +# @size:        Desired image size in bytes
 +# @config_path: Path to Vitastor configuration
 +# @etcd_address: etcd connection address(es)
 +# @etcd_prefix: etcd key/value prefix
 +##
 +{ 'struct': 'BlockdevOptionsVitastor',
 +  'data': { '*inode': 'uint64',
 +            '*pool': 'uint64',
 +            '*size': 'uint64',
 +            '*image': 'str',
 +            '*config_path': 'str',
 +            '*etcd_address': 'str',
 +            '*etcd_prefix': 'str' } }
 +
 +##
 # @ReplicationMode:
 #
 # An enumeration of replication modes.
@@ -3995,6 +4013,7 @@
       'replication': { 'type': 'BlockdevOptionsReplication',
                        'if': 'defined(CONFIG_REPLICATION)' },
       'sheepdog':   'BlockdevOptionsSheepdog',
 +      'vitastor':   'BlockdevOptionsVitastor',
       'ssh':        'BlockdevOptionsSsh',
       'throttle':   'BlockdevOptionsThrottle',
       'vdi':        'BlockdevOptionsGenericFormat',
@@ -4365,6 +4384,17 @@
             '*cluster-size' :   'size' } }
 ##
 +# @BlockdevCreateOptionsVitastor:
 +#
 +# Driver specific image creation options for Vitastor.
 +#
 +# @size: Size of the virtual disk in bytes
 +##
 +{ 'struct': 'BlockdevCreateOptionsVitastor',
 +  'data': { 'location':         'BlockdevOptionsVitastor',
 +            'size':             'size' } }
 +
 +##
 # @BlockdevVmdkSubformat:
 #
 # Subformat options for VMDK images
@@ -4626,6 +4656,7 @@
       'qed':            'BlockdevCreateOptionsQed',
       'rbd':            'BlockdevCreateOptionsRbd',
       'sheepdog':       'BlockdevCreateOptionsSheepdog',
 +      'vitastor':       'BlockdevCreateOptionsVitastor',
       'ssh':            'BlockdevCreateOptionsSsh',
       'vdi':            'BlockdevCreateOptionsVdi',
       'vhdx':           'BlockdevCreateOptionsVhdx',
 Index: qemu/scripts/modules/module_block.py
 ===================================================================
 --- qemu.orig/scripts/modules/module_block.py
 +++ qemu/scripts/modules/module_block.py
@@ -85,6 +85,7 @@ def print_bottom(fheader):
 output_file = sys.argv[1]
 with open(output_file, 'w') as fheader:
     print_top(fheader)
 +    add_module(fheader, "vitastor", "vitastor", "vitastor")
     for filename in sys.argv[2:]:
         if os.path.isfile(filename):
--- a/qemu-5.1-vitastor.patch
+++ b/qemu-5.1-vitastor.patch
@ -0,0 +1,88 @@
 Index: qemu-5.1+dfsg/qapi/block-core.json
 ===================================================================
 --- qemu-5.1+dfsg.orig/qapi/block-core.json
 +++ qemu-5.1+dfsg/qapi/block-core.json
@@ -2807,7 +2807,7 @@
             'luks', 'nbd', 'nfs', 'null-aio', 'null-co', 'nvme', 'parallels',
             'qcow', 'qcow2', 'qed', 'quorum', 'raw', 'rbd',
             { 'name': 'replication', 'if': 'defined(CONFIG_REPLICATION)' },
 -            'sheepdog',
 +            'sheepdog', 'vitastor',
             'ssh', 'throttle', 'vdi', 'vhdx', 'vmdk', 'vpc', 'vvfat' ] }
 ##
@@ -3644,6 +3644,28 @@
             '*tag': 'str' } }
 ##
 +# @BlockdevOptionsVitastor:
 +#
 +# Driver specific block device options for vitastor
 +#
 +# @image:       Image name
 +# @inode:       Inode number
 +# @pool:        Pool ID
 +# @size:        Desired image size in bytes
 +# @config_path: Path to Vitastor configuration
 +# @etcd_address: etcd connection address(es)
 +# @etcd_prefix: etcd key/value prefix
 +##
 +{ 'struct': 'BlockdevOptionsVitastor',
 +  'data': { '*inode': 'uint64',
 +            '*pool': 'uint64',
 +            '*size': 'uint64',
 +            '*image': 'str',
 +            '*config_path': 'str',
 +            '*etcd_address': 'str',
 +            '*etcd_prefix': 'str' } }
 +
 +##
 # @ReplicationMode:
 #
 # An enumeration of replication modes.
@@ -3988,6 +4006,7 @@
       'replication': { 'type': 'BlockdevOptionsReplication',
                        'if': 'defined(CONFIG_REPLICATION)' },
       'sheepdog':   'BlockdevOptionsSheepdog',
 +      'vitastor':   'BlockdevOptionsVitastor',
       'ssh':        'BlockdevOptionsSsh',
       'throttle':   'BlockdevOptionsThrottle',
       'vdi':        'BlockdevOptionsGenericFormat',
@@ -4376,6 +4395,17 @@
             '*cluster-size' :   'size' } }
 ##
 +# @BlockdevCreateOptionsVitastor:
 +#
 +# Driver specific image creation options for Vitastor.
 +#
 +# @size: Size of the virtual disk in bytes
 +##
 +{ 'struct': 'BlockdevCreateOptionsVitastor',
 +  'data': { 'location':         'BlockdevOptionsVitastor',
 +            'size':             'size' } }
 +
 +##
 # @BlockdevVmdkSubformat:
 #
 # Subformat options for VMDK images
@@ -4637,6 +4667,7 @@
       'qed':            'BlockdevCreateOptionsQed',
       'rbd':            'BlockdevCreateOptionsRbd',
       'sheepdog':       'BlockdevCreateOptionsSheepdog',
 +      'vitastor':       'BlockdevCreateOptionsVitastor',
       'ssh':            'BlockdevCreateOptionsSsh',
       'vdi':            'BlockdevCreateOptionsVdi',
       'vhdx':           'BlockdevCreateOptionsVhdx',
 Index: qemu-5.1+dfsg/scripts/modules/module_block.py
 ===================================================================
 --- qemu-5.1+dfsg.orig/scripts/modules/module_block.py
 +++ qemu-5.1+dfsg/scripts/modules/module_block.py
@@ -86,6 +86,7 @@ if __name__ == '__main__':
     output_file = sys.argv[1]
     with open(output_file, 'w') as fheader:
         print_top(fheader)
 +        add_module(fheader, "vitastor", "vitastor", "vitastor")
         for filename in sys.argv[2:]:
             if os.path.isfile(filename):
--- a/rpm/build-tarball.sh
+++ b/rpm/build-tarball.sh
@ -1,5 +1,5 @@
 #!/bin/bash
-# Vitastor depends on QEMU and/or FIO headers, but QEMU and FIO don't have -devel packages
+# Vitastor depends on QEMU and FIO headers, but QEMU and FIO don't have -devel packages
 # So we have to copy their headers into the source tarball
 set -e
@ -18,11 +18,34 @@ else
 fi
 cd ~/rpmbuild/SPECS
 rpmbuild -bp fio.spec
 perl -i -pe 's/^make V=1/exit 0; make V=1/' qemu*.spec
 rpmbuild -bc qemu*.spec
 perl -i -pe 's/^exit 0; make V=1/make V=1/' qemu*.spec
 cd ~/rpmbuild/BUILD/qemu*/
 rm -rf $VITASTOR/qemu $VITASTOR/fio
 mkdir -p $VITASTOR/qemu/b/qemu
 make -j8 config-host.h
 cp config-host.h $VITASTOR/qemu/b/qemu
 cp -r include $VITASTOR/qemu
 if [ -f qapi-schema.json ]; then
    # QEMU 2.0
    make qapi-types.h
    cp qapi-types.h $VITASTOR/qemu/b/qemu
 else
    # QEMU 3.0+
    make qapi
    cp -r qapi $VITASTOR/qemu/b/qemu
 fi
 cd $VITASTOR
 sh copy-qemu-includes.sh
 rm -rf qemu
 mv qemu-copy qemu
 ln -s ~/rpmbuild/BUILD/fio*/ fio
 sh copy-fio-includes.sh
 rm fio
 mv fio-copy fio
 FIO=`rpm -qi fio | perl -e 'while(<>) { /^Epoch[\s:]+(\S+)/ && print "$1:"; /^Version[\s:]+(\S+)/ && print $1; /^Release[\s:]+(\S+)/ && print "-$1"; }'`
 QEMU=`rpm -qi qemu qemu-kvm | perl -e 'while(<>) { /^Epoch[\s:]+(\S+)/ && print "$1:"; /^Version[\s:]+(\S+)/ && print $1; /^Release[\s:]+(\S+)/ && print "-$1"; }'`
 perl -i -pe 's/(Requires:\s*fio)([^\n]+)?/$1 = '$FIO'/' $VITASTOR/rpm/vitastor-el$EL.spec
-tar --transform 's#^#vitastor-0.6.10/#' --exclude 'rpm/*.rpm' -czf $VITASTOR/../vitastor-0.6.10$(rpm --eval '%dist').tar.gz *
+perl -i -pe 's/(Requires:\s*qemu(?:-kvm)?)([^\n]+)?/$1 = '$QEMU'/' $VITASTOR/rpm/vitastor-el$EL.spec
 tar --transform 's#^#vitastor-0.6.4/#' --exclude 'rpm/*.rpm' -czf $VITASTOR/../vitastor-0.6.4$(rpm --eval '%dist').tar.gz *
--- a/rpm/qemu-el8.Dockerfile
+++ b/rpm/qemu-el8.Dockerfile
@ -1,6 +1,3 @@
 # This is an attempt to automatically build patched RPM specs
 # More or less broken, better use *.spec.patch for now (and copy src/qemu_driver.c to SOURCES/qemu-vitastor.c)
 # Build packages for CentOS 8 inside a container
 # cd ..; podman build -t qemu-el8 -v `pwd`/packages:/root/packages -f rpm/qemu-el8.Dockerfile .
@ -14,7 +11,7 @@ RUN rm -rf /var/lib/dnf/*; dnf download --disablerepo='*' --enablerepo='centos-a
 RUN rpm --nomd5 -i qemu*.src.rpm
 RUN cd ~/rpmbuild/SPECS && dnf builddep -y --enablerepo=PowerTools --spec qemu-kvm.spec
-ADD patches/qemu-*-vitastor.patch /root/vitastor/patches/
+ADD qemu-*-vitastor.patch /root/vitastor/
 RUN set -e; \
    mkdir -p /root/packages/qemu-el8; \
@ -28,7 +25,7 @@ RUN set -e; \
    echo "Patch$((PN+1)): qemu-4.2-vitastor.patch" >> qemu-kvm.spec; \
    tail -n +2 xx01 >> qemu-kvm.spec; \
    perl -i -pe 's/(^Release:\s*\d+)/$1.vitastor/' qemu-kvm.spec; \
-    cp /root/vitastor/patches/qemu-4.2-vitastor.patch ~/rpmbuild/SOURCES; \
+    cp /root/vitastor/qemu-4.2-vitastor.patch ~/rpmbuild/SOURCES; \
    rpmbuild --nocheck -ba qemu-kvm.spec; \
    cp ~/rpmbuild/RPMS/*/*qemu* /root/packages/qemu-el8/; \
    cp ~/rpmbuild/SRPMS/*qemu* /root/packages/qemu-el8/
--- a/rpm/qemu-kvm-4.2-el8.spec.patch
+++ b/rpm/qemu-kvm-4.2-el8.spec.patch
@ -1,112 +0,0 @@
 --- qemu-kvm.spec.orig	2021-12-01 22:10:58.967935539 +0000
 +++ qemu-kvm.spec	2021-12-01 22:14:38.530117175 +0000
@@ -57,6 +57,7 @@ Requires: %{name}-block-gluster = %{epoc
 %endif                                                           \
 Requires: %{name}-block-iscsi = %{epoch}:%{version}-%{release}   \
 Requires: %{name}-block-rbd = %{epoch}:%{version}-%{release}     \
 +Requires: %{name}-block-vitastor = %{epoch}:%{version}-%{release}\
 Requires: %{name}-block-ssh = %{epoch}:%{version}-%{release}
 # Macro to properly setup RHEL/RHEV conflict handling
@@ -67,7 +68,7 @@ Obsoletes: %1-rhev
 Summary: QEMU is a machine emulator and virtualizer
 Name: qemu-kvm
 Version: 4.2.0
 -Release: 29%{?dist}.6
 +Release: 32.vitastor%{?dist}.6
 # Epoch because we pushed a qemu-1.0 package. AIUI this can't ever be dropped
 Epoch: 15
 License: GPLv2 and GPLv2+ and CC-BY
@@ -102,6 +103,7 @@ Source33: qemu-pr-helper.socket
 Source34: 81-kvm-rhel.rules
 Source35: udev-kvm-check.c
 Source36: README.tests
 +Source37: qemu-vitastor.c
 Patch0005: 0005-Initial-redhat-build.patch
@@ -825,6 +827,7 @@ Patch331: kvm-Drop-bogus-IPv6-messages.p
 Patch333: kvm-virtiofsd-Whitelist-fchmod.patch
 # For bz#1883869 - virtiofsd core dump in KATA Container [rhel-8.2.1.z]
 Patch334: kvm-virtiofsd-avoid-proc-self-fd-tempdir.patch
 +Patch335: qemu-4.2-vitastor.patch
 BuildRequires: wget
 BuildRequires: rpm-build
@@ -861,6 +864,7 @@ BuildRequires: libcurl-devel
 BuildRequires: libssh-devel
 BuildRequires: librados-devel
 BuildRequires: librbd-devel
 +BuildRequires: vitastor-client-devel
 %if %{have_gluster}
 # For gluster block driver
 BuildRequires: glusterfs-api-devel
@@ -1095,6 +1099,14 @@ Install this package if you want to acce
 using the rbd protocol.
 +%package  block-vitastor
 +Summary: QEMU Vitastor block driver
 +Requires: %{name}-common%{?_isa} = %{epoch}:%{version}-%{release}
 +
 +%description block-vitastor
 +This package provides the additional Vitastor block driver for QEMU.
 +
 +
 %package  block-ssh
 Summary: QEMU SSH block driver
 Requires: %{name}-common%{?_isa} = %{epoch}:%{version}-%{release}
@@ -1109,6 +1121,7 @@ the Secure Shell (SSH) protocol.
 %prep
 %setup -n qemu-%{version}
 %autopatch -p1
 +cp %{SOURCE37} ./block/vitastor.c
 %build
 %global buildarch %{kvm_target}-softmmu
@@ -1116,7 +1129,7 @@ the Secure Shell (SSH) protocol.
 # --build-id option is used for giving info to the debug packages.
 buildldflags="VL_LDFLAGS=-Wl,--build-id"
 -%global block_drivers_list qcow2,raw,file,host_device,nbd,iscsi,rbd,blkdebug,luks,null-co,nvme,copy-on-read,throttle
 +%global block_drivers_list qcow2,raw,file,host_device,nbd,iscsi,rbd,vitastor,blkdebug,luks,null-co,nvme,copy-on-read,throttle
 %if 0%{have_gluster}
     %global block_drivers_list %{block_drivers_list},gluster
@@ -1131,7 +1144,7 @@ buildldflags="VL_LDFLAGS=-Wl,--build-id"
  --docdir="%{qemudocdir}" \
  --libexecdir="%{_libexecdir}" \
  --extra-ldflags="-Wl,--build-id -Wl,-z,relro -Wl,-z,now" \
 - --extra-cflags="%{optflags}" \
 + --extra-cflags="%{optflags} -DRHEL_BDRV_CO_TRUNCATE_FLAGS" \
  --with-pkgversion="%{name}-%{version}-%{release}" \
  --with-confsuffix=/"%{name}" \
  --firmwarepath=%{_prefix}/share/qemu-firmware \
@@ -1152,6 +1165,7 @@ buildldflags="VL_LDFLAGS=-Wl,--build-id"
   --disable-numa \
 %endif
   --enable-rbd \
 +  --enable-vitastor \
 %if 0%{have_librdma}
   --enable-rdma \
 %else
@@ -1192,9 +1206,7 @@ buildldflags="VL_LDFLAGS=-Wl,--build-id"
 %endif
   --python=%{__python3} \
   --target-list="%{buildarch}" \
 -  --block-drv-rw-whitelist=%{block_drivers_list} \
   --audio-drv-list= \
 -  --block-drv-ro-whitelist=vmdk,vhdx,vpc,https,ssh \
   --with-coroutine=ucontext \
   --tls-priority=NORMAL \
   --disable-bluez \
@@ -1750,6 +1762,9 @@ useradd -r -u 107 -g qemu -G kvm -d / -s
 %files block-rbd
 %{_libdir}/qemu-kvm/block-rbd.so
 +%files block-vitastor
 +%{_libdir}/qemu-kvm/block-vitastor.so
 +
 %files block-ssh
 %{_libdir}/qemu-kvm/block-ssh.so
--- a/rpm/qemu-kvm-6.0-el8.spec.patch
+++ b/rpm/qemu-kvm-6.0-el8.spec.patch
@ -1,103 +0,0 @@
 --- qemu-kvm_6.0.spec.orig	2021-10-22 13:22:07.000000000 +0000
 +++ qemu-kvm_6.0.spec	2021-12-01 22:43:26.095508618 +0000
@@ -67,6 +67,7 @@ Requires: %{name}-hw-usbredir = %{epoch}
 %endif                                                           \
 Requires: %{name}-block-iscsi = %{epoch}:%{version}-%{release}   \
 Requires: %{name}-block-rbd = %{epoch}:%{version}-%{release}     \
 +Requires: %{name}-block-vitastor = %{epoch}:%{version}-%{release}\
 Requires: %{name}-block-ssh = %{epoch}:%{version}-%{release}
 # Macro to properly setup RHEL/RHEV conflict handling
@@ -77,7 +78,7 @@ Obsoletes: %1-rhev <= %{epoch}:%{version
 Summary: QEMU is a machine emulator and virtualizer
 Name: qemu-kvm
 Version: 6.0.0
 -Release: 33%{?dist}
 +Release: 33.vitastor%{?dist}
 # Epoch because we pushed a qemu-1.0 package. AIUI this can't ever be dropped
 Epoch: 15
 License: GPLv2 and GPLv2+ and CC-BY
@@ -112,6 +113,7 @@ Source33: qemu-pr-helper.socket
 Source34: 81-kvm-rhel.rules
 Source35: udev-kvm-check.c
 Source36: README.tests
 +Source37: qemu-vitastor.c
 Patch0001: 0001-redhat-Adding-slirp-to-the-exploded-tree.patch
@@ -342,6 +344,7 @@ Patch109: kvm-virtio-balloon-Fix-page-po
 Patch110: kvm-virtio-net-fix-use-after-unmap-free-for-sg.patch
 # For bz#1999141 - migration fails with: "qemu-kvm: get_pci_config_device: Bad config data: i=0x9a read: 3 device: 2 cmask: ff wmask: 0 w1cmask:0"
 Patch111: kvm-Fix-virtio-net-pci-vectors-compat.patch
 +Patch112: qemu-6.0-vitastor.patch
 BuildRequires: wget
 BuildRequires: rpm-build
@@ -379,6 +382,7 @@ BuildRequires: libcurl-devel
 BuildRequires: libssh-devel
 BuildRequires: librados-devel
 BuildRequires: librbd-devel
 +BuildRequires: vitastor-client-devel
 %if %{have_gluster}
 # For gluster block driver
 BuildRequires: glusterfs-api-devel
@@ -625,6 +629,14 @@ Install this package if you want to acce
 using the rbd protocol.
 +%package  block-vitastor
 +Summary: QEMU Vitastor block driver
 +Requires: %{name}-common%{?_isa} = %{epoch}:%{version}-%{release}
 +
 +%description block-vitastor
 +This package provides the additional Vitastor block driver for QEMU.
 +
 +
 %package  block-ssh
 Summary: QEMU SSH block driver
 Requires: %{name}-common%{?_isa} = %{epoch}:%{version}-%{release}
@@ -678,6 +690,7 @@ This package provides usbredir support.
 rm -fr slirp
 mkdir slirp
 %autopatch -p1
 +cp %{SOURCE37} ./block/vitastor.c
 %global qemu_kvm_build qemu_kvm_build
 %global qemu_kiwi_build qemu_kiwi_src/build
@@ -701,7 +714,7 @@ mkdir -p %{qemu_kvm_build}
 # --build-id option is used for giving info to the debug packages.
 buildldflags="VL_LDFLAGS=-Wl,--build-id"
 -%global block_drivers_list qcow2,raw,file,host_device,nbd,iscsi,rbd,blkdebug,luks,null-co,nvme,copy-on-read,throttle
 +%global block_drivers_list qcow2,raw,file,host_device,nbd,iscsi,rbd,vitastor,blkdebug,luks,null-co,nvme,copy-on-read,throttle
 %if 0%{have_gluster}
     %global block_drivers_list %{block_drivers_list},gluster
@@ -894,6 +907,7 @@ pushd %{qemu_kvm_build}
 %endif
   --enable-pie \
   --enable-rbd \
 +  --enable-vitastor \
 %if 0%{have_librdma}
   --enable-rdma \
 %endif
@@ -977,9 +991,7 @@ find ../default-configs -name "*-rh-devi
   --firmwarepath=%{_prefix}/share/qemu-firmware \
   --meson="%{__meson}" \
   --target-list="%{buildarch}" \
 -  --block-drv-rw-whitelist=%{block_drivers_list} \
   --audio-drv-list= \
 -  --block-drv-ro-whitelist=vmdk,vhdx,vpc,https,ssh \
   --with-coroutine=ucontext \
   --with-git=git \
   --tls-priority=@QEMU,SYSTEM \
@@ -1584,6 +1596,9 @@ sh %{_sysconfdir}/sysconfig/modules/kvm.
 %files block-rbd
 %{_libdir}/qemu-kvm/block-rbd.so
 +%files block-vitastor
 +%{_libdir}/qemu-kvm/block-vitastor.so
 +
 %files block-ssh
 %{_libdir}/qemu-kvm/block-ssh.so
--- a/rpm/qemu-kvm-4.2-el7.spec.patch
+++ b/rpm/qemu-kvm-4.2-el7.spec.patch
@ -1,5 +1,5 @@
 --- qemu-kvm.spec.orig	2020-11-09 23:41:03.000000000 +0000
-+++ qemu-kvm.spec	2021-12-01 21:53:30.895747529 +0000
+++ qemu-kvm.spec	2020-12-06 10:44:24.207640963 +0000
@@ -2,7 +2,7 @@
 %global SLOF_gittagcommit 899d9883
@ -9,24 +9,25 @@
 %global have_opengl   1
 %global have_fdt      0
 %global have_gluster  1
-@@ -57,6 +57,7 @@ Requires: %{name}-block-gluster = %{epoc
+@@ -56,7 +56,7 @@ Requires: %{name}-block-curl = %{epoch}:
 Requires: %{name}-block-gluster = %{epoch}:%{version}-%{release} \
 %endif                                                           \
 Requires: %{name}-block-iscsi = %{epoch}:%{version}-%{release}   \
- Requires: %{name}-block-rbd = %{epoch}:%{version}-%{release}     \
+-Requires: %{name}-block-rbd = %{epoch}:%{version}-%{release}     \
-+Requires: %{name}-block-vitastor = %{epoch}:%{version}-%{release}\
+#Requires: %{name}-block-rbd = %{epoch}:%{version}-%{release}     \
 Requires: %{name}-block-ssh = %{epoch}:%{version}-%{release}
 # Macro to properly setup RHEL/RHEV conflict handling
-@@ -67,7 +68,7 @@ Obsoletes: %1-rhev
+@@ -67,7 +67,7 @@ Obsoletes: %1-rhev
 Summary: QEMU is a machine emulator and virtualizer
 Name: qemu-kvm
 Version: 4.2.0
 -Release: 29.vitastor%{?dist}.6
-+Release: 32.vitastor%{?dist}.6
+Release: 30.vitastor%{?dist}.6
 # Epoch because we pushed a qemu-1.0 package. AIUI this can't ever be dropped
 Epoch: 15
 License: GPLv2 and GPLv2+ and CC-BY
-@@ -99,9 +100,10 @@ Source30: kvm-s390x.conf
+@@ -99,8 +99,8 @@ Source30: kvm-s390x.conf
 Source31: kvm-x86.conf
 Source32: qemu-pr-helper.service
 Source33: qemu-pr-helper.socket
@ -35,11 +36,9 @@
 +#Source34: 81-kvm-rhel.rules
 +#Source35: udev-kvm-check.c
 Source36: README.tests
 +Source37: qemu-vitastor.c
- Patch0005: 0005-Initial-redhat-build.patch
+@@ -825,7 +825,9 @@ Patch331: kvm-Drop-bogus-IPv6-messages.p
@@ -825,7 +827,9 @@ Patch331: kvm-Drop-bogus-IPv6-messages.p
 Patch333: kvm-virtiofsd-Whitelist-fchmod.patch
 # For bz#1883869 - virtiofsd core dump in KATA Container [rhel-8.2.1.z]
 Patch334: kvm-virtiofsd-avoid-proc-self-fd-tempdir.patch
@ -50,7 +49,7 @@
 BuildRequires: wget
 BuildRequires: rpm-build
-@@ -842,7 +846,8 @@ BuildRequires: pciutils-devel
+@@ -842,7 +844,8 @@ BuildRequires: pciutils-devel
 BuildRequires: libiscsi-devel
 BuildRequires: ncurses-devel
 BuildRequires: libattr-devel
@ -60,7 +59,7 @@
 %if %{have_usbredir}
 BuildRequires: usbredir-devel >= 0.7.1
 %endif
-@@ -856,12 +861,13 @@ BuildRequires: virglrenderer-devel
+@@ -856,12 +859,12 @@ BuildRequires: virglrenderer-devel
 # For smartcard NSS support
 BuildRequires: nss-devel
 %endif
@ -71,13 +70,12 @@
 BuildRequires: libssh-devel
 -BuildRequires: librados-devel
 -BuildRequires: librbd-devel
-+BuildRequires: librados2-devel
+#BuildRequires: librados-devel
-+BuildRequires: librbd1-devel
+#BuildRequires: librbd-devel
 +BuildRequires: vitastor-client-devel
 %if %{have_gluster}
 # For gluster block driver
 BuildRequires: glusterfs-api-devel
-@@ -955,25 +961,25 @@ hardware for a full system such as a PC
+@@ -955,25 +958,25 @@ hardware for a full system such as a PC
 %package -n qemu-kvm-core
 Summary: qemu-kvm core components
@ -107,35 +105,38 @@
 # For compressed guest memory dumps
 Requires: lzo snappy
 %if %{have_kvm_setup}
-@@ -1096,6 +1102,14 @@ Install this package if you want to acce
+@@ -1085,15 +1088,15 @@ This package provides the additional iSC
- using the rbd protocol.
+ Install this package if you want to access iSCSI volumes.
 -%package  block-rbd
 -Summary: QEMU Ceph/RBD block driver
 -Requires: %{name}-common%{?_isa} = %{epoch}:%{version}-%{release}
 -
 -%description block-rbd
 -This package provides the additional Ceph/RBD block driver for QEMU.
 -
 -Install this package if you want to access remote Ceph volumes
 -using the rbd protocol.
 +#%package  block-rbd
 +#Summary: QEMU Ceph/RBD block driver
 +#Requires: %{name}-common%{?_isa} = %{epoch}:%{version}-%{release}
 +#
 +#%description block-rbd
 +#This package provides the additional Ceph/RBD block driver for QEMU.
 +#
 +#Install this package if you want to access remote Ceph volumes
 +#using the rbd protocol.
 +%package  block-vitastor
 +Summary: QEMU Vitastor block driver
 +Requires: %{name}-common%{?_isa} = %{epoch}:%{version}-%{release}
 +
 +%description block-vitastor
 +This package provides the additional Vitastor block driver for QEMU.
 +
 +
 %package  block-ssh
- Summary: QEMU SSH block driver
+@@ -1117,12 +1120,14 @@ the Secure Shell (SSH) protocol.
 Requires: %{name}-common%{?_isa} = %{epoch}:%{version}-%{release}
@@ -1110,6 +1124,7 @@ the Secure Shell (SSH) protocol.
 %prep
 %setup -n qemu-%{version}
 %autopatch -p1
 +cp %{SOURCE37} ./block/vitastor.c
 %build
 %global buildarch %{kvm_target}-softmmu
@@ -1117,12 +1132,13 @@ the Secure Shell (SSH) protocol.
 # --build-id option is used for giving info to the debug packages.
 buildldflags="VL_LDFLAGS=-Wl,--build-id"
 -%global block_drivers_list qcow2,raw,file,host_device,nbd,iscsi,rbd,blkdebug,luks,null-co,nvme,copy-on-read,throttle
-+%global block_drivers_list qcow2,raw,file,host_device,nbd,iscsi,rbd,vitastor,blkdebug,luks,null-co,nvme,copy-on-read,throttle
+#%global block_drivers_list qcow2,raw,file,host_device,nbd,iscsi,rbd,blkdebug,luks,null-co,nvme,copy-on-read,throttle
 +%global block_drivers_list qcow2,raw,file,host_device,nbd,iscsi,blkdebug,luks,null-co,nvme,copy-on-read,throttle
 %if 0%{have_gluster}
     %global block_drivers_list %{block_drivers_list},gluster
@ -145,20 +146,12 @@
 ./configure  \
  --prefix="%{_prefix}" \
  --libdir="%{_libdir}" \
-@@ -1132,7 +1148,7 @@ buildldflags="VL_LDFLAGS=-Wl,--build-id"
+@@ -1152,15 +1157,15 @@ buildldflags="VL_LDFLAGS=-Wl,--build-id"
-  --docdir="%{qemudocdir}" \
+ %else
  --libexecdir="%{_libexecdir}" \
  --extra-ldflags="-Wl,--build-id -Wl,-z,relro -Wl,-z,now" \
 - --extra-cflags="%{optflags}" \
 + --extra-cflags="%{optflags} -DRHEL_BDRV_CO_TRUNCATE_FLAGS" \
  --with-pkgversion="%{name}-%{version}-%{release}" \
  --with-confsuffix=/"%{name}" \
  --firmwarepath=%{_prefix}/share/qemu-firmware \
@@ -1153,14 +1169,15 @@ buildldflags="VL_LDFLAGS=-Wl,--build-id"
   --disable-numa \
 %endif
-   --enable-rbd \
+-  --enable-rbd \
-+  --enable-vitastor \
+  --disable-rbd \
 %if 0%{have_librdma}
   --enable-rdma \
 %else
@ -172,7 +165,7 @@
   --enable-spice \
   --enable-smartcard \
   --enable-virglrenderer \
-@@ -1179,7 +1196,7 @@ buildldflags="VL_LDFLAGS=-Wl,--build-id"
+@@ -1179,7 +1184,7 @@ buildldflags="VL_LDFLAGS=-Wl,--build-id"
 %else
   --disable-usb-redir \
 %endif
@ -181,7 +174,7 @@
 %ifarch x86_64
   --enable-libpmem \
 %else
-@@ -1193,9 +1210,7 @@ buildldflags="VL_LDFLAGS=-Wl,--build-id"
+@@ -1193,9 +1198,7 @@ buildldflags="VL_LDFLAGS=-Wl,--build-id"
 %endif
   --python=%{__python3} \
   --target-list="%{buildarch}" \
@ -191,7 +184,7 @@
   --with-coroutine=ucontext \
   --tls-priority=NORMAL \
   --disable-bluez \
-@@ -1262,7 +1277,7 @@ buildldflags="VL_LDFLAGS=-Wl,--build-id"
+@@ -1262,7 +1265,7 @@ buildldflags="VL_LDFLAGS=-Wl,--build-id"
   --disable-sanitizers \
   --disable-hvf \
   --disable-whpx \
@ -200,7 +193,7 @@
   --disable-membarrier \
   --disable-vhost-crypto \
   --disable-libxml2 \
-@@ -1308,7 +1323,7 @@ make V=1 %{?_smp_mflags} $buildldflags
+@@ -1308,7 +1311,7 @@ make V=1 %{?_smp_mflags} $buildldflags
 cp -a %{kvm_target}-softmmu/qemu-system-%{kvm_target} qemu-kvm
 gcc %{SOURCE6} $RPM_OPT_FLAGS $RPM_LD_FLAGS -o ksmctl
@ -209,7 +202,7 @@
 %install
 %define _udevdir %(pkg-config --variable=udevdir udev)
-@@ -1343,8 +1358,8 @@ mkdir -p $RPM_BUILD_ROOT%{testsdir}/test
+@@ -1343,8 +1346,8 @@ mkdir -p $RPM_BUILD_ROOT%{testsdir}/test
 mkdir -p $RPM_BUILD_ROOT%{testsdir}/tests/qemu-iotests
 mkdir -p $RPM_BUILD_ROOT%{testsdir}/scripts/qmp
@ -220,7 +213,7 @@
 install -m 0644 scripts/dump-guest-memory.py \
                 $RPM_BUILD_ROOT%{_datadir}/%{name}
-@@ -1562,6 +1577,8 @@ rm -rf $RPM_BUILD_ROOT%{qemudocdir}/inte
+@@ -1562,6 +1565,8 @@ rm -rf $RPM_BUILD_ROOT%{qemudocdir}/inte
 # Remove spec
 rm -rf $RPM_BUILD_ROOT%{qemudocdir}/specs
@ -229,7 +222,7 @@
 %check
 export DIFF=diff; make check V=1
-@@ -1645,8 +1662,8 @@ useradd -r -u 107 -g qemu -G kvm -d / -s
+@@ -1645,8 +1650,8 @@ useradd -r -u 107 -g qemu -G kvm -d / -s
 %config(noreplace) %{_sysconfdir}/sysconfig/ksm
 %{_unitdir}/ksmtuned.service
 %{_sbindir}/ksmtuned
@ -240,7 +233,7 @@
 %ghost %{_sysconfdir}/kvm
 %config(noreplace) %{_sysconfdir}/ksmtuned.conf
 %dir %{_sysconfdir}/%{name}
-@@ -1711,8 +1728,8 @@ useradd -r -u 107 -g qemu -G kvm -d / -s
+@@ -1711,8 +1716,8 @@ useradd -r -u 107 -g qemu -G kvm -d / -s
 %{_libexecdir}/vhost-user-gpu
 %{_datadir}/%{name}/vhost-user/50-qemu-gpu.json
 %endif
@ -251,13 +244,14 @@
 %files -n qemu-img
 %defattr(-,root,root)
-@@ -1751,6 +1768,9 @@ useradd -r -u 107 -g qemu -G kvm -d / -s
+@@ -1748,8 +1753,8 @@ useradd -r -u 107 -g qemu -G kvm -d / -s
- %files block-rbd
+ %files block-iscsi
- %{_libdir}/qemu-kvm/block-rbd.so
+ %{_libdir}/qemu-kvm/block-iscsi.so
 -%files block-rbd
 -%{_libdir}/qemu-kvm/block-rbd.so
 +#%files block-rbd
 +#%{_libdir}/qemu-kvm/block-rbd.so
 +%files block-vitastor
 +%{_libdir}/qemu-kvm/block-vitastor.so
 +
 %files block-ssh
 %{_libdir}/qemu-kvm/block-ssh.so
--- a/rpm/qemu-kvm.spec.patch
+++ b/rpm/qemu-kvm.spec.patch
@ -0,0 +1,29 @@
 --- qemu-kvm.spec	2020-12-05 13:13:54.388623517 +0000
 +++ qemu-kvm.spec	2020-12-05 13:13:58.728696598 +0000
@@ -67,7 +67,7 @@ Obsoletes: %1-rhev
 Summary: QEMU is a machine emulator and virtualizer
 Name: qemu-kvm
 Version: 4.2.0
 -Release: 29%{?dist}.6
 +Release: 29.vitastor%{?dist}.6
 # Epoch because we pushed a qemu-1.0 package. AIUI this can't ever be dropped
 Epoch: 15
 License: GPLv2 and GPLv2+ and CC-BY
@@ -825,6 +825,7 @@ Patch331: kvm-Drop-bogus-IPv6-messages.p
 Patch333: kvm-virtiofsd-Whitelist-fchmod.patch
 # For bz#1883869 - virtiofsd core dump in KATA Container [rhel-8.2.1.z]
 Patch334: kvm-virtiofsd-avoid-proc-self-fd-tempdir.patch
 +Patch335: qemu-4.2-vitastor.patch
 BuildRequires: wget
 BuildRequires: rpm-build
@@ -1192,9 +1193,7 @@ buildldflags="VL_LDFLAGS=-Wl,--build-id"
 %endif
   --python=%{__python3} \
   --target-list="%{buildarch}" \
 -  --block-drv-rw-whitelist=%{block_drivers_list} \
   --audio-drv-list= \
 -  --block-drv-ro-whitelist=vmdk,vhdx,vpc,https,ssh \
   --with-coroutine=ucontext \
   --tls-priority=NORMAL \
   --disable-bluez \
--- a/rpm/vitastor-el7.Dockerfile
+++ b/rpm/vitastor-el7.Dockerfile
@ -9,11 +9,15 @@ WORKDIR /root
 RUN rm -f /etc/yum.repos.d/CentOS-Media.repo
 RUN yum -y --enablerepo=extras install centos-release-scl epel-release yum-utils rpm-build
 RUN yum -y install https://vitastor.io/rpms/centos/7/vitastor-release-1.0-1.el7.noarch.rpm
-RUN yum -y install devtoolset-9-gcc-c++ devtoolset-9-libatomic-devel gcc make cmake gperftools-devel fio rh-nodejs12 jerasure-devel gf-complete-devel rdma-core-devel
+RUN yum -y install devtoolset-9-gcc-c++ devtoolset-9-libatomic-devel gperftools-devel qemu-kvm fio rh-nodejs12 jerasure-devel gf-complete-devel
 RUN yumdownloader --disablerepo=centos-sclo-rh --source qemu-kvm
 RUN yumdownloader --disablerepo=centos-sclo-rh --source fio
 RUN rpm --nomd5 -i qemu*.src.rpm
 RUN rpm --nomd5 -i fio*.src.rpm
 RUN rm -f /etc/yum.repos.d/CentOS-Media.repo
-RUN cd ~/rpmbuild/SPECS && yum-builddep -y fio.spec
+RUN cd ~/rpmbuild/SPECS && yum-builddep -y --enablerepo='*' --disablerepo=centos-sclo-rh --disablerepo=centos-sclo-rh-source --disablerepo=centos-sclo-sclo-testing qemu-kvm.spec
 RUN cd ~/rpmbuild/SPECS && yum-builddep -y --enablerepo='*' --disablerepo=centos-sclo-rh --disablerepo=centos-sclo-rh-source --disablerepo=centos-sclo-sclo-testing fio.spec
 RUN yum -y install rdma-core-devel
 ADD https://vitastor.io/rpms/liburing-el7/liburing-0.7-2.el7.src.rpm /root
@ -34,7 +38,7 @@ ADD . /root/vitastor
 RUN set -e; \
    cd /root/vitastor/rpm; \
    sh build-tarball.sh; \
-    cp /root/vitastor-0.6.10.el7.tar.gz ~/rpmbuild/SOURCES; \
+    cp /root/vitastor-0.6.4.el7.tar.gz ~/rpmbuild/SOURCES; \
    cp vitastor-el7.spec ~/rpmbuild/SPECS/vitastor.spec; \
    cd ~/rpmbuild/SPECS/; \
    rpmbuild -ba vitastor.spec; \
--- a/rpm/vitastor-el7.spec
+++ b/rpm/vitastor-el7.spec
@ -1,11 +1,11 @@
 Name:           vitastor
-Version:        0.6.10
+Version:        0.6.4
 Release:        1%{?dist}
 Summary:        Vitastor, a fast software-defined clustered block storage
 License:        Vitastor Network Public License 1.1
 URL:            https://vitastor.io/
-Source0:        vitastor-0.6.10.el7.tar.gz
+Source0:        vitastor-0.6.4.el7.tar.gz
 BuildRequires:  liburing-devel >= 0.6
 BuildRequires:  gperftools-devel
@ -16,11 +16,13 @@ BuildRequires:  jerasure-devel
 BuildRequires:  gf-complete-devel
 BuildRequires:  libibverbs-devel
 BuildRequires:  cmake
-Requires:       vitastor-osd = %{version}-%{release}
+Requires:       fio = 3.7-1.el7
-Requires:       vitastor-mon = %{version}-%{release}
+Requires:       qemu-kvm = 2.0.0-1.el7.6
-Requires:       vitastor-client = %{version}-%{release}
+Requires:       rh-nodejs12
-Requires:       vitastor-client-devel = %{version}-%{release}
+Requires:       rh-nodejs12-npm
-Requires:       vitastor-fio = %{version}-%{release}
+Requires:       liburing >= 0.6
 Requires:       libJerasure2
 Requires:       lpsolve
 %description
 Vitastor is a small, simple and fast clustered block storage (storage for VM drives),
@ -29,66 +31,13 @@ symmetric clustering and automatic data distribution over any number of drives o
 size with configurable redundancy (replication or erasure codes/XOR).
 %package -n vitastor-osd
 Summary:        Vitastor - OSD
 Requires:       libJerasure2
 Requires:       liburing >= 0.6
 Requires:       vitastor-client = %{version}-%{release}
 %description -n vitastor-osd
 Vitastor object storage daemon, i.e. server program that stores data.
 %package -n vitastor-mon
 Summary:        Vitastor - monitor
 Requires:       rh-nodejs12
 Requires:       rh-nodejs12-npm
 Requires:       lpsolve
 %description -n vitastor-mon
 Vitastor monitor, i.e. server program responsible for watching cluster state and
 scheduling cluster-level operations.
 %package -n vitastor-client
 Summary:        Vitastor - client
 Requires:       liburing >= 0.6
 %description -n vitastor-client
 Vitastor client library and command-line interface.
 %package -n vitastor-client-devel
 Summary:        Vitastor - development files
 Group:          Development/Libraries
 Requires:       vitastor-client = %{version}-%{release}
 %description -n vitastor-client-devel
 Vitastor library headers for development.
 %package -n vitastor-fio
 Summary:        Vitastor - fio drivers
 Group:          Development/Libraries
 Requires:       vitastor-client = %{version}-%{release}
 Requires:       fio = 3.7-1.el7
 %description -n vitastor-fio
 Vitastor fio drivers for benchmarking.
 %prep
 %setup -q
 %build
 . /opt/rh/devtoolset-9/enable
-%cmake .
+%cmake . -DQEMU_PLUGINDIR=qemu-kvm
 %make_build
@ -100,42 +49,23 @@ cd mon
 npm install
 cd ..
 mkdir -p %buildroot/usr/lib/vitastor
-cp mon/make-osd.sh %buildroot/usr/lib/vitastor
+cp -r mon %buildroot/usr/lib/vitastor/mon
 cp -r mon %buildroot/usr/lib/vitastor
 %files
-%doc GPL-2.0.txt VNPL-1.1.txt README.md README-ru.md
+%doc
 %files -n vitastor-osd
 %_bindir/vitastor-osd
 %_bindir/vitastor-dump-journal
 %files -n vitastor-mon
 /usr/lib/vitastor/mon
 %files -n vitastor-client
 %_bindir/vitastor-nbd
-%_bindir/vitastor-cli
+%_bindir/vitastor-osd
 %_bindir/vitastor-rm
-%_bindir/vita
+%_libdir/qemu-kvm/block-vitastor.so
 %_libdir/libvitastor_blk.so*
 %_libdir/libvitastor_client.so*
 /usr/lib/vitastor/make-osd.sh
 %files -n vitastor-client-devel
 %_includedir/vitastor_c.h
 %_libdir/pkgconfig
 %files -n vitastor-fio
 %_libdir/libfio_vitastor.so
 %_libdir/libfio_vitastor_blk.so
 %_libdir/libfio_vitastor_sec.so
 %_libdir/libvitastor_blk.so*
 %_libdir/libvitastor_client.so*
 %_includedir/vitastor_c.h
 /usr/lib/vitastor
 %changelog
--- a/rpm/vitastor-el8.Dockerfile
+++ b/rpm/vitastor-el8.Dockerfile
@ -8,11 +8,14 @@ WORKDIR /root
 RUN rm -f /etc/yum.repos.d/CentOS-Media.repo
 RUN dnf -y install centos-release-advanced-virtualization epel-release dnf-plugins-core
 RUN yum -y install https://vitastor.io/rpms/centos/8/vitastor-release-1.0-1.el8.noarch.rpm
-RUN dnf -y install gcc-toolset-9 gcc-toolset-9-gcc-c++ gperftools-devel \
+RUN dnf --enablerepo='centos-advanced-virtualization' -y install gcc-toolset-9 gcc-toolset-9-gcc-c++ gperftools-devel qemu-kvm fio nodejs rpm-build jerasure-devel gf-complete-devel
-    fio nodejs rpm-build jerasure-devel gf-complete-devel libibverbs-devel libarchive cmake
+RUN rm -rf /var/lib/dnf/*; dnf download --disablerepo='*' --enablerepo='vitastor' --source qemu-kvm
 RUN dnf download --source fio
 RUN rpm --nomd5 -i qemu*.src.rpm
 RUN rpm --nomd5 -i fio*.src.rpm
-RUN cd ~/rpmbuild/SPECS && dnf builddep -y --enablerepo=powertools --spec fio.spec
+RUN cd ~/rpmbuild/SPECS && dnf builddep -y --enablerepo=powertools --spec qemu-kvm.spec
 RUN cd ~/rpmbuild/SPECS && dnf builddep -y --enablerepo=powertools --spec fio.spec && dnf install -y cmake
 RUN yum -y install libibverbs-devel
 ADD https://vitastor.io/rpms/liburing-el7/liburing-0.7-2.el7.src.rpm /root
@ -26,14 +29,14 @@ RUN set -e; \
    cp ~/rpmbuild/RPMS/*/liburing* /root/packages/liburing-el8/; \
    cp ~/rpmbuild/SRPMS/liburing* /root/packages/liburing-el8/
-RUN rpm -i `ls /root/packages/liburing-el8/liburing-*.x86_64.rpm | grep -v debug`
+RUN rpm -i `ls /root/packages/liburing-el7/liburing-*.x86_64.rpm | grep -v debug`
 ADD . /root/vitastor
 RUN set -e; \
    cd /root/vitastor/rpm; \
    sh build-tarball.sh; \
-    cp /root/vitastor-0.6.10.el8.tar.gz ~/rpmbuild/SOURCES; \
+    cp /root/vitastor-0.6.4.el8.tar.gz ~/rpmbuild/SOURCES; \
    cp vitastor-el8.spec ~/rpmbuild/SPECS/vitastor.spec; \
    cd ~/rpmbuild/SPECS/; \
    rpmbuild -ba vitastor.spec; \
--- a/rpm/vitastor-el8.spec
+++ b/rpm/vitastor-el8.spec
@ -1,11 +1,11 @@
 Name:           vitastor
-Version:        0.6.10
+Version:        0.6.4
 Release:        1%{?dist}
 Summary:        Vitastor, a fast software-defined clustered block storage
 License:        Vitastor Network Public License 1.1
 URL:            https://vitastor.io/
-Source0:        vitastor-0.6.10.el8.tar.gz
+Source0:        vitastor-0.6.4.el8.tar.gz
 BuildRequires:  liburing-devel >= 0.6
 BuildRequires:  gperftools-devel
@ -15,11 +15,12 @@ BuildRequires:  jerasure-devel
 BuildRequires:  gf-complete-devel
 BuildRequires:  libibverbs-devel
 BuildRequires:  cmake
-Requires:       vitastor-osd = %{version}-%{release}
+Requires:       fio = 3.7-3.el8
-Requires:       vitastor-mon = %{version}-%{release}
+Requires:       qemu-kvm = 4.2.0-29.el8.6
-Requires:       vitastor-client = %{version}-%{release}
+Requires:       nodejs >= 10
-Requires:       vitastor-client-devel = %{version}-%{release}
+Requires:       liburing >= 0.6
-Requires:       vitastor-fio = %{version}-%{release}
+Requires:       libJerasure2
 Requires:       lpsolve
 %description
 Vitastor is a small, simple and fast clustered block storage (storage for VM drives),
@ -28,65 +29,13 @@ symmetric clustering and automatic data distribution over any number of drives o
 size with configurable redundancy (replication or erasure codes/XOR).
 %package -n vitastor-osd
 Summary:        Vitastor - OSD
 Requires:       libJerasure2
 Requires:       liburing >= 0.6
 Requires:       vitastor-client = %{version}-%{release}
 %description -n vitastor-osd
 Vitastor object storage daemon, i.e. server program that stores data.
 %package -n vitastor-mon
 Summary:        Vitastor - monitor
 Requires:       nodejs >= 10
 Requires:       lpsolve
 %description -n vitastor-mon
 Vitastor monitor, i.e. server program responsible for watching cluster state and
 scheduling cluster-level operations.
 %package -n vitastor-client
 Summary:        Vitastor - client
 Requires:       liburing >= 0.6
 %description -n vitastor-client
 Vitastor client library and command-line interface.
 %package -n vitastor-client-devel
 Summary:        Vitastor - development files
 Group:          Development/Libraries
 Requires:       vitastor-client = %{version}-%{release}
 %description -n vitastor-client-devel
 Vitastor library headers for development.
 %package -n vitastor-fio
 Summary:        Vitastor - fio drivers
 Group:          Development/Libraries
 Requires:       vitastor-client = %{version}-%{release}
 Requires:       fio = 3.7-3.el8
 %description -n vitastor-fio
 Vitastor fio drivers for benchmarking.
 %prep
 %setup -q
 %build
 . /opt/rh/gcc-toolset-9/enable
-%cmake .
+%cmake . -DQEMU_PLUGINDIR=qemu-kvm
 %make_build
@ -97,42 +46,23 @@ cd mon
 npm install
 cd ..
 mkdir -p %buildroot/usr/lib/vitastor
 cp mon/make-osd.sh %buildroot/usr/lib/vitastor
 cp -r mon %buildroot/usr/lib/vitastor
 %files
-%doc GPL-2.0.txt VNPL-1.1.txt README.md README-ru.md
+%doc
 %files -n vitastor-osd
 %_bindir/vitastor-osd
 %_bindir/vitastor-dump-journal
 %files -n vitastor-mon
 /usr/lib/vitastor/mon
 %files -n vitastor-client
 %_bindir/vitastor-nbd
-%_bindir/vitastor-cli
+%_bindir/vitastor-osd
 %_bindir/vitastor-rm
-%_bindir/vita
+%_libdir/qemu-kvm/block-vitastor.so
 %_libdir/libvitastor_blk.so*
 %_libdir/libvitastor_client.so*
 /usr/lib/vitastor/make-osd.sh
 %files -n vitastor-client-devel
 %_includedir/vitastor_c.h
 %_libdir/pkgconfig
 %files -n vitastor-fio
 %_libdir/libfio_vitastor.so
 %_libdir/libfio_vitastor_blk.so
 %_libdir/libfio_vitastor_sec.so
 %_libdir/libvitastor_blk.so*
 %_libdir/libvitastor_client.so*
 %_includedir/vitastor_c.h
 /usr/lib/vitastor
 %changelog
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@ -4,7 +4,7 @@ project(vitastor)
 include(GNUInstallDirs)
-set(WITH_QEMU false CACHE BOOL "Build QEMU driver inside Vitastor source tree")
+set(WITH_QEMU true CACHE BOOL "Build QEMU driver")
 set(WITH_FIO true CACHE BOOL "Build FIO driver")
 set(QEMU_PLUGINDIR qemu CACHE STRING "QEMU plugin directory suffix (qemu-kvm on RHEL)")
 set(WITH_ASAN false CACHE BOOL "Build with AddressSanitizer")
@ -15,8 +15,8 @@ if("${CMAKE_INSTALL_PREFIX}" MATCHES "^/usr/local/?$")
 	set(CMAKE_INSTALL_RPATH "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_LIBDIR}")
 endif()
-add_definitions(-DVERSION="0.6.10")
+add_definitions(-DVERSION="0.6.4")
-add_definitions(-Wall -Wno-sign-compare -Wno-comment -Wno-parentheses -Wno-pointer-arith -fdiagnostics-color=always -I ${CMAKE_SOURCE_DIR}/src)
+add_definitions(-Wall -Wno-sign-compare -Wno-comment -Wno-parentheses -Wno-pointer-arith -I ${CMAKE_SOURCE_DIR}/src)
 if (${WITH_ASAN})
 	add_definitions(-fsanitize=address -fno-omit-frame-pointer)
 	add_link_options(-fsanitize=address -fno-omit-frame-pointer)
@ -36,11 +36,6 @@ string(REGEX REPLACE "([\\/\\-]D) *NDEBUG" "" CMAKE_C_FLAGS_RELEASE "${CMAKE_C_F
 string(REGEX REPLACE "([\\/\\-]D) *NDEBUG" "" CMAKE_C_FLAGS_MINSIZEREL "${CMAKE_C_FLAGS_MINSIZEREL}")
 string(REGEX REPLACE "([\\/\\-]D) *NDEBUG" "" CMAKE_C_FLAGS_RELWITHDEBINFO "${CMAKE_C_FLAGS_RELWITHDEBINFO}")
 macro(install_symlink filepath sympath)
 	install(CODE "execute_process(COMMAND ${CMAKE_COMMAND} -E create_symlink ${filepath} \$ENV{DESTDIR}${sympath})")
 	install(CODE "message(\"-- Created symlink: ${sympath} -> ${filepath}\")")
 endmacro(install_symlink)
 find_package(PkgConfig)
 pkg_check_modules(LIBURING REQUIRED liburing)
 if (${WITH_QEMU})
@ -88,8 +83,8 @@ if (IBVERBS_LIBRARIES)
 	set(MSGR_RDMA "msgr_rdma.cpp")
 endif (IBVERBS_LIBRARIES)
 add_library(vitastor_common STATIC
-	epoll_manager.cpp etcd_state_client.cpp messenger.cpp addr_util.cpp
+	epoll_manager.cpp etcd_state_client.cpp
-	msgr_stop.cpp msgr_op.cpp msgr_send.cpp msgr_receive.cpp ringloop.cpp ../json11/json11.cpp
+	messenger.cpp msgr_stop.cpp msgr_op.cpp msgr_send.cpp msgr_receive.cpp ringloop.cpp ../json11/json11.cpp
 	http_client.cpp osd_ops.cpp pg_states.cpp timerfd_manager.cpp base64.cpp ${MSGR_RDMA}
 )
 target_compile_options(vitastor_common PUBLIC -fPIC)
@ -112,7 +107,6 @@ if (${WITH_FIO})
 	add_library(fio_vitastor_sec SHARED
 		fio_sec_osd.cpp
 		rw_blocking.cpp
 		addr_util.cpp
 	)
 	target_link_libraries(fio_vitastor_sec
 		tcmalloc_minimal
@ -122,7 +116,6 @@ endif (${WITH_FIO})
 # libvitastor_client.so
 add_library(vitastor_client SHARED
 	cluster_client.cpp
 	cluster_client_list.cpp
 	vitastor_c.cpp
 )
 set_target_properties(vitastor_client PROPERTIES PUBLIC_HEADER "vitastor_c.h")
@ -152,15 +145,13 @@ target_link_libraries(vitastor-nbd
 	vitastor_client
 )
-# vitastor-cli
+# vitastor-rm
-add_executable(vitastor-cli
+add_executable(vitastor-rm
-	cli.cpp cli_alloc_osd.cpp cli_simple_offsets.cpp cli_df.cpp
+	rm_inode.cpp
 	cli_ls.cpp cli_create.cpp cli_modify.cpp cli_flatten.cpp cli_merge.cpp cli_rm.cpp cli_snap_rm.cpp
 )
-target_link_libraries(vitastor-cli
+target_link_libraries(vitastor-rm
 	vitastor_client
 )
 configure_file(vitastor.pc.in vitastor.pc @ONLY)
 # vitastor-dump-journal
 add_executable(vitastor-dump-journal
@ -172,7 +163,6 @@ if (${WITH_QEMU})
 	add_library(qemu_vitastor SHARED
 		qemu_driver.c
 	)
 	target_compile_options(qemu_vitastor PUBLIC -DVITASTOR_SOURCE_TREE)
 	target_include_directories(qemu_vitastor PUBLIC
 		../qemu/b/qemu
 		../qemu/include
@ -190,11 +180,11 @@ endif (${WITH_QEMU})
 ### Test stubs
 # stub_osd, stub_bench, osd_test
-add_executable(stub_osd stub_osd.cpp rw_blocking.cpp addr_util.cpp)
+add_executable(stub_osd stub_osd.cpp rw_blocking.cpp)
 target_link_libraries(stub_osd tcmalloc_minimal)
-add_executable(stub_bench stub_bench.cpp rw_blocking.cpp addr_util.cpp)
+add_executable(stub_bench stub_bench.cpp rw_blocking.cpp)
 target_link_libraries(stub_bench tcmalloc_minimal)
-add_executable(osd_test osd_test.cpp rw_blocking.cpp addr_util.cpp)
+add_executable(osd_test osd_test.cpp rw_blocking.cpp)
 target_link_libraries(osd_test tcmalloc_minimal)
 # osd_rmw_test
@ -230,7 +220,7 @@ target_link_libraries(test_cas
 # test_cluster_client
 add_executable(test_cluster_client
 	test_cluster_client.cpp
-	pg_states.cpp osd_ops.cpp cluster_client.cpp cluster_client_list.cpp msgr_op.cpp mock/messenger.cpp msgr_stop.cpp
+	pg_states.cpp osd_ops.cpp cluster_client.cpp msgr_op.cpp mock/messenger.cpp msgr_stop.cpp
 	etcd_state_client.cpp timerfd_manager.cpp ../json11/json11.cpp
 )
 target_compile_definitions(test_cluster_client PUBLIC -D__MOCK__)
@ -244,15 +234,12 @@ target_include_directories(test_cluster_client PUBLIC ${CMAKE_SOURCE_DIR}/src/mo
 ### Install
-install(TARGETS vitastor-osd vitastor-dump-journal vitastor-nbd vitastor-cli RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})
+install(TARGETS vitastor-osd vitastor-dump-journal vitastor-nbd vitastor-rm RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})
 install_symlink(vitastor-cli ${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_BINDIR}/vitastor-rm)
 install_symlink(vitastor-cli ${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_BINDIR}/vita)
 install(
 	TARGETS vitastor_blk vitastor_client
 	LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
 	PUBLIC_HEADER DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
 )
 install(FILES ${CMAKE_CURRENT_BINARY_DIR}/vitastor.pc DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig)
 if (${WITH_FIO})
 	install(TARGETS fio_vitastor fio_vitastor_blk fio_vitastor_sec LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR})
 endif (${WITH_FIO})
--- a/src/addr_util.cpp
+++ b/src/addr_util.cpp
@ -1,60 +0,0 @@
 #include <arpa/inet.h>
 #include <string.h>
 #include <stdio.h>
 #include <stdexcept>
 #include "addr_util.h"
 bool string_to_addr(std::string str, bool parse_port, int default_port, struct sockaddr *addr)
 {
    if (parse_port)
    {
        int p = str.rfind(':');
        if (p != std::string::npos && !(str.length() > 0 && str[p-1] == ']')) // "[ipv6]" which contains ':'
        {
            char null_byte = 0;
            int n = sscanf(str.c_str()+p+1, "%d%c", &default_port, &null_byte);
            if (n != 1 || default_port >= 0x10000)
                return false;
            str = str.substr(0, p);
        }
    }
    if (inet_pton(AF_INET, str.c_str(), &((struct sockaddr_in*)addr)->sin_addr) == 1)
    {
        addr->sa_family = AF_INET;
        ((struct sockaddr_in*)addr)->sin_port = htons(default_port);
        return true;
    }
    if (str.length() >= 2 && str[0] == '[' && str[str.length()-1] == ']')
        str = str.substr(1, str.length()-2);
    if (inet_pton(AF_INET6, str.c_str(), &((struct sockaddr_in6*)addr)->sin6_addr) == 1)
    {
        addr->sa_family = AF_INET6;
        ((struct sockaddr_in6*)addr)->sin6_port = htons(default_port);
        return true;
    }
    return false;
 }
 std::string addr_to_string(const sockaddr &addr)
 {
    char peer_str[256];
    bool ok = false;
    int port;
    if (addr.sa_family == AF_INET)
    {
        ok = !!inet_ntop(AF_INET, &((sockaddr_in*)&addr)->sin_addr, peer_str, 256);
        port = ntohs(((sockaddr_in*)&addr)->sin_port);
    }
    else if (addr.sa_family == AF_INET6)
    {
        ok = !!inet_ntop(AF_INET6, &((sockaddr_in6*)&addr)->sin6_addr, peer_str, 256);
        port = ntohs(((sockaddr_in6*)&addr)->sin6_port);
    }
    else
        throw std::runtime_error("Unknown address family "+std::to_string(addr.sa_family));
    if (!ok)
        throw std::runtime_error(std::string("inet_ntop: ") + strerror(errno));
    return std::string(peer_str)+":"+std::to_string(port);
 }
--- a/src/addr_util.h
+++ b/src/addr_util.h
@ -1,7 +0,0 @@
 #pragma once
 #include <sys/socket.h>
 #include <string>
 bool string_to_addr(std::string str, bool parse_port, int default_port, struct sockaddr *addr);
 std::string addr_to_string(const sockaddr &addr);
--- a/src/blockstore.cpp
+++ b/src/blockstore.cpp
@ -48,11 +48,6 @@ std::map<uint64_t, uint64_t> & blockstore_t::get_inode_space_stats()
    return impl->inode_space_stats;
 }
 void blockstore_t::dump_diagnostics()
 {
    return impl->dump_diagnostics();
 }
 uint32_t blockstore_t::get_block_size()
 {
    return impl->get_block_size();
@ -68,11 +63,6 @@ uint64_t blockstore_t::get_free_block_count()
    return impl->get_free_block_count();
 }
 uint64_t blockstore_t::get_journal_size()
 {
    return impl->get_journal_size();
 }
 uint32_t blockstore_t::get_bitmap_granularity()
 {
    return impl->get_bitmap_granularity();
--- a/src/blockstore.h
+++ b/src/blockstore.h
@ -186,15 +186,10 @@ public:
    // Get per-inode space usage statistics
    std::map<uint64_t, uint64_t> & get_inode_space_stats();
    // Print diagnostics to stdout
    void dump_diagnostics();
    // FIXME rename to object_size
    uint32_t get_block_size();
    uint64_t get_block_count();
    uint64_t get_free_block_count();
    uint64_t get_journal_size();
    uint32_t get_bitmap_granularity();
 };
--- a/src/blockstore_flush.cpp
+++ b/src/blockstore_flush.cpp
@ -182,75 +182,6 @@ void journal_flusher_t::release_trim()
    trim_wanted--;
 }
 void journal_flusher_t::dump_diagnostics()
 {
    const char *unflushable_type = "";
    obj_ver_id unflushable = { 0 };
    // Try to find out if there is a flushable object for information
    for (object_id cur_oid: flush_queue)
    {
        obj_ver_id cur = { .oid = cur_oid, .version = flush_versions[cur_oid] };
        auto dirty_end = bs->dirty_db.find(cur);
        if (dirty_end == bs->dirty_db.end())
        {
            // Already flushed
            continue;
        }
        auto repeat_it = sync_to_repeat.find(cur.oid);
        if (repeat_it != sync_to_repeat.end())
        {
            // Someone is already flushing it
            unflushable_type = "locked,";
            unflushable = cur;
            break;
        }
        if (dirty_end->second.journal_sector >= bs->journal.dirty_start &&
            (bs->journal.dirty_start >= bs->journal.used_start ||
            dirty_end->second.journal_sector < bs->journal.used_start))
        {
            // Object is more recent than possible to flush
            bool found = try_find_older(dirty_end, cur);
            if (!found)
            {
                unflushable_type = "dirty,";
                unflushable = cur;
                break;
            }
        }
        unflushable_type = "ok,";
        unflushable = cur;
        break;
    }
    printf(
        "Flusher: queued=%ld first=%s%lx:%lx trim_wanted=%d dequeuing=%d trimming=%d cur=%d target=%d active=%d syncing=%d\n",
        flush_queue.size(), unflushable_type, unflushable.oid.inode, unflushable.oid.stripe,
        trim_wanted, dequeuing, trimming, cur_flusher_count, target_flusher_count,
        active_flushers, syncing_flushers
    );
 }
 bool journal_flusher_t::try_find_older(std::map<obj_ver_id, dirty_entry>::iterator & dirty_end, obj_ver_id & cur)
 {
    bool found = false;
    while (dirty_end != bs->dirty_db.begin())
    {
        dirty_end--;
        if (dirty_end->first.oid != cur.oid)
        {
            break;
        }
        if (!(dirty_end->second.journal_sector >= bs->journal.dirty_start &&
            (bs->journal.dirty_start >= bs->journal.used_start ||
            dirty_end->second.journal_sector < bs->journal.used_start)))
        {
            found = true;
            cur.version = dirty_end->first.version;
            break;
        }
    }
    return found;
 }
 #define await_sqe(label) \
    resume_##label:\
        sqe = bs->get_sqe();\
@ -355,15 +286,30 @@ stop_flusher:
            // And it may even block writes if we don't flush the older version
            // (if it's in the beginning of the journal)...
            // So first try to find an older version of the same object to flush.
-            bool found = flusher->try_find_older(dirty_end, cur);
+            bool found = false;
            while (dirty_end != bs->dirty_db.begin())
            {
                dirty_end--;
                if (dirty_end->first.oid != cur.oid)
                {
                    break;
                }
                if (!(dirty_end->second.journal_sector >= bs->journal.dirty_start &&
                    (bs->journal.dirty_start >= bs->journal.used_start ||
                    dirty_end->second.journal_sector < bs->journal.used_start)))
                {
                    found = true;
                    cur.version = dirty_end->first.version;
                    break;
                }
            }
            if (!found)
            {
                // Try other objects
                flusher->sync_to_repeat.erase(cur.oid);
                int search_left = flusher->flush_queue.size() - 1;
 #ifdef BLOCKSTORE_DEBUG
-                printf("Flusher overran writers (%lx:%lx v%lu, dirty_start=%08lx) - searching for older flushes (%d left)\n",
+                printf("Flusher overran writers (dirty_start=%08lx) - searching for older flushes (%d left)\n", bs->journal.dirty_start, search_left);
                    cur.oid.inode, cur.oid.stripe, cur.version, bs->journal.dirty_start, search_left);
 #endif
                while (search_left > 0)
                {
@ -386,12 +332,7 @@ stop_flusher:
                        else
                        {
                            repeat_it = flusher->sync_to_repeat.find(cur.oid);
-                            if (repeat_it != flusher->sync_to_repeat.end())
+                            if (repeat_it == flusher->sync_to_repeat.end())
                            {
                                if (repeat_it->second < cur.version)
                                    repeat_it->second = cur.version;
                            }
                            else
                            {
                                flusher->sync_to_repeat[cur.oid] = 0;
                                break;
@ -547,9 +488,8 @@ resume_1:
            clean_disk_entry *new_entry = (clean_disk_entry*)(meta_new.buf + meta_new.pos*bs->clean_entry_size);
            if (new_entry->oid.inode != 0 && new_entry->oid != cur.oid)
            {
-                printf("Fatal error (metadata corruption or bug): tried to delete metadata entry %lu (%lx:%lx v%lu) while deleting %lx:%lx\n",
+                printf("Fatal error (metadata corruption or bug): tried to delete metadata entry %lu (%lx:%lx) while deleting %lx:%lx\n",
-                    clean_loc >> bs->block_order, new_entry->oid.inode, new_entry->oid.stripe,
+                    clean_loc >> bs->block_order, new_entry->oid.inode, new_entry->oid.stripe, cur.oid.inode, cur.oid.stripe);
                    new_entry->version, cur.oid.inode, cur.oid.stripe);
                exit(1);
            }
            // zero out new metadata entry
@ -560,9 +500,8 @@ resume_1:
            clean_disk_entry *new_entry = (clean_disk_entry*)(meta_new.buf + meta_new.pos*bs->clean_entry_size);
            if (new_entry->oid.inode != 0 && new_entry->oid != cur.oid)
            {
-                printf("Fatal error (metadata corruption or bug): tried to overwrite non-zero metadata entry %lu (%lx:%lx v%lu) with %lx:%lx v%lu\n",
+                printf("Fatal error (metadata corruption or bug): tried to overwrite non-zero metadata entry %lu (%lx:%lx) with %lx:%lx\n",
-                    clean_loc >> bs->block_order, new_entry->oid.inode, new_entry->oid.stripe, new_entry->version,
+                    clean_loc >> bs->block_order, new_entry->oid.inode, new_entry->oid.stripe, cur.oid.inode, cur.oid.stripe);
                    cur.oid.inode, cur.oid.stripe, cur.version);
                exit(1);
            }
            new_entry->oid = cur.oid;
@ -745,15 +684,12 @@ bool journal_flusher_co::scan_dirty(int wait_base)
                offset = dirty_it->second.offset;
                end_offset = dirty_it->second.offset + dirty_it->second.len;
                it = v.begin();
-                while (end_offset > offset)
+                while (1)
                {
                    for (; it != v.end(); it++)
-                        if (it->offset+it->len > offset)
+                        if (it->offset >= offset)
                            break;
-                    // If all items end before offset or if the found item starts after end_offset, just insert the buffer
+                    if (it == v.end() || it->offset > offset && it->len > 0)
                    // If (offset < it->offset < end_offset) insert (offset..it->offset) part
                    // If (it->offset <= offset <= it->offset+it->len) then just skip to it->offset+it->len
                    if (it == v.end() || it->offset > offset)
                    {
                        submit_offset = dirty_it->second.location + offset - dirty_it->second.offset;
                        submit_len = it == v.end() || it->offset >= end_offset ? end_offset-offset : it->offset-offset;
@ -777,7 +713,7 @@ bool journal_flusher_co::scan_dirty(int wait_base)
                        }
                    }
                    offset = it->offset+it->len;
-                    if (it == v.end())
+                    if (it == v.end() || offset >= end_offset)
                        break;
                }
            }
--- a/src/blockstore_flush.h
+++ b/src/blockstore_flush.h
@ -97,9 +97,6 @@ class journal_flusher_t
    std::map<uint64_t, meta_sector_t> meta_sectors;
    std::deque<object_id> flush_queue;
    std::map<object_id, uint64_t> flush_versions;
    bool try_find_older(std::map<obj_ver_id, dirty_entry>::iterator & dirty_end, obj_ver_id & cur);
 public:
    journal_flusher_t(blockstore_impl_t *bs);
    ~journal_flusher_t();
@ -111,5 +108,4 @@ public:
    void enqueue_flush(obj_ver_id oid);
    void unshift_flush(obj_ver_id oid, bool force);
    void remove_flush(object_id oid);
    void dump_diagnostics();
 };
--- a/src/blockstore_impl.cpp
+++ b/src/blockstore_impl.cpp
@ -235,12 +235,6 @@ void blockstore_impl_t::loop()
        {
            throw std::runtime_error(std::string("io_uring_submit: ") + strerror(-ret));
        }
        for (auto s: journal.submitting_sectors)
        {
            // Mark journal sector writes as submitted
            journal.sector_info[s].submit_id = 0;
        }
        journal.submitting_sectors.clear();
        if ((initial_ring_space - ringloop->space_left()) > 0)
        {
            live = true;
@ -601,9 +595,3 @@ void blockstore_impl_t::process_list(blockstore_op_t *op)
    op->buf = stable;
    FINISH_OP(op);
 }
 void blockstore_impl_t::dump_diagnostics()
 {
    journal.dump_diagnostics();
    flusher->dump_diagnostics();
 }
--- a/src/blockstore_impl.h
+++ b/src/blockstore_impl.h
@ -54,14 +54,6 @@
 #define IS_BIG_WRITE(st) (((st) & 0x0F) == BS_ST_BIG_WRITE)
 #define IS_DELETE(st) (((st) & 0x0F) == BS_ST_DELETE)
 #define BS_SUBMIT_CHECK_SQES(n) \
    if (ringloop->space_left() < (n))\
    {\
        /* Pause until there are more requests available */\
        PRIV(op)->wait_for = WAIT_SQE;\
        return 0;\
    }
 #define BS_SUBMIT_GET_SQE(sqe, data) \
    BS_SUBMIT_GET_ONLY_SQE(sqe); \
    struct ring_data_t *data = ((ring_data_t*)sqe->user_data)
@ -178,7 +170,7 @@ struct blockstore_op_private_t
    std::vector<fulfill_read_t> read_vec;
    // Sync, write
-    int min_flushed_journal_sector, max_flushed_journal_sector;
+    uint64_t min_flushed_journal_sector, max_flushed_journal_sector;
    // Write
    struct iovec iov_zerofill[3];
@ -259,7 +251,6 @@ class blockstore_impl_t
    int data_fd;
    uint64_t meta_size, meta_area, meta_len;
    uint64_t data_size, data_len;
    uint64_t data_device_sect, meta_device_sect, journal_device_sect;
    void *metadata_buffer = NULL;
@ -291,10 +282,6 @@ class blockstore_impl_t
    void open_journal();
    uint8_t* get_clean_entry_bitmap(uint64_t block_loc, int offset);
    // Journaling
    void prepare_journal_sector_write(int sector, blockstore_op_t *op);
    void handle_journal_write(ring_data_t *data, uint64_t flush_id);
    // Asynchronous init
    int initialized;
    int metadata_buf_size;
@ -322,18 +309,21 @@ class blockstore_impl_t
    // Sync
    int continue_sync(blockstore_op_t *op, bool queue_has_in_progress_sync);
    void handle_sync_event(ring_data_t *data, blockstore_op_t *op);
    void ack_sync(blockstore_op_t *op);
    // Stabilize
    int dequeue_stable(blockstore_op_t *op);
    int continue_stable(blockstore_op_t *op);
    void mark_stable(const obj_ver_id & ov, bool forget_dirty = false);
    void handle_stable_event(ring_data_t *data, blockstore_op_t *op);
    void stabilize_object(object_id oid, uint64_t max_ver);
    // Rollback
    int dequeue_rollback(blockstore_op_t *op);
    int continue_rollback(blockstore_op_t *op);
    void mark_rolled_back(const obj_ver_id & ov);
    void handle_rollback_event(ring_data_t *data, blockstore_op_t *op);
    void erase_dirty(blockstore_dirty_db_t::iterator dirty_start, blockstore_dirty_db_t::iterator dirty_end, uint64_t clean_loc);
    // List
@ -371,12 +361,8 @@ public:
    // Space usage statistics
    std::map<uint64_t, uint64_t> inode_space_stats;
    // Print diagnostics to stdout
    void dump_diagnostics();
    inline uint32_t get_block_size() { return block_size; }
    inline uint64_t get_block_count() { return block_count; }
    inline uint64_t get_free_block_count() { return data_alloc->get_free_count(); }
    inline uint32_t get_bitmap_granularity() { return disk_alignment; }
    inline uint64_t get_journal_size() { return journal.len; }
 };
--- a/src/blockstore_journal.cpp
+++ b/src/blockstore_journal.cpp
@ -153,74 +153,23 @@ journal_entry* prefill_single_journal_entry(journal_t & journal, uint16_t type,
    return je;
 }
-void blockstore_impl_t::prepare_journal_sector_write(int cur_sector, blockstore_op_t *op)
+void prepare_journal_sector_write(journal_t & journal, int cur_sector, io_uring_sqe *sqe, std::function<void(ring_data_t*)> cb)
 {
-    // Don't submit the same sector twice in the same batch
+    journal.sector_info[cur_sector].dirty = false;
    if (!journal.sector_info[cur_sector].submit_id)
    {
        io_uring_sqe *sqe = get_sqe();
        // Caller must ensure availability of an SQE
        assert(sqe != NULL);
        ring_data_t *data = ((ring_data_t*)sqe->user_data);
    journal.sector_info[cur_sector].written = true;
        journal.sector_info[cur_sector].submit_id = ++journal.submit_id;
        journal.submitting_sectors.push_back(cur_sector);
    journal.sector_info[cur_sector].flush_count++;
    ring_data_t *data = ((ring_data_t*)sqe->user_data);
    data->iov = (struct iovec){
        (journal.inmemory
            ? journal.buffer + journal.sector_info[cur_sector].offset
            : journal.sector_buf + journal.block_size*cur_sector),
        journal.block_size
    };
-        data->callback = [this, flush_id = journal.submit_id](ring_data_t *data) { handle_journal_write(data, flush_id); };
+    data->callback = cb;
    my_uring_prep_writev(
        sqe, journal.fd, &data->iov, 1, journal.offset + journal.sector_info[cur_sector].offset
    );
 }
    journal.sector_info[cur_sector].dirty = false;
    // But always remember that this operation has to wait until this exact journal write is finished
    journal.flushing_ops.insert((pending_journaling_t){
        .flush_id = journal.sector_info[cur_sector].submit_id,
        .sector = cur_sector,
        .op = op,
    });
    auto priv = PRIV(op);
    priv->pending_ops++;
    if (!priv->min_flushed_journal_sector)
        priv->min_flushed_journal_sector = 1+cur_sector;
    priv->max_flushed_journal_sector = 1+cur_sector;
 }
 void blockstore_impl_t::handle_journal_write(ring_data_t *data, uint64_t flush_id)
 {
    live = true;
    if (data->res != data->iov.iov_len)
    {
        // FIXME: our state becomes corrupted after a write error. maybe do something better than just die
        throw std::runtime_error(
            "journal write failed ("+std::to_string(data->res)+" != "+std::to_string(data->iov.iov_len)+
            "). in-memory state is corrupted. AAAAAAAaaaaaaaaa!!!111"
        );
    }
    auto fl_it = journal.flushing_ops.upper_bound((pending_journaling_t){ .flush_id = flush_id });
    if (fl_it != journal.flushing_ops.end() && fl_it->flush_id == flush_id)
    {
        journal.sector_info[fl_it->sector].flush_count--;
    }
    while (fl_it != journal.flushing_ops.end() && fl_it->flush_id == flush_id)
    {
        auto priv = PRIV(fl_it->op);
        priv->pending_ops--;
        assert(priv->pending_ops >= 0);
        if (priv->pending_ops == 0)
        {
            release_journal_sectors(fl_it->op);
            priv->op_state++;
            ringloop->wakeup();
        }
        journal.flushing_ops.erase(fl_it++);
    }
 }
 journal_t::~journal_t()
 {
@ -269,19 +218,3 @@ uint64_t journal_t::get_trim_pos()
    // Can't trim journal
    return used_start;
 }
 void journal_t::dump_diagnostics()
 {
    auto journal_used_it = used_sectors.lower_bound(used_start);
    if (journal_used_it == used_sectors.end())
    {
        // Journal is cleared to its end, restart from the beginning
        journal_used_it = used_sectors.begin();
    }
    printf(
        "Journal: used_start=%08lx next_free=%08lx dirty_start=%08lx trim_to=%08lx trim_to_refs=%ld\n",
        used_start, next_free, dirty_start,
        journal_used_it == used_sectors.end() ? 0 : journal_used_it->first,
        journal_used_it == used_sectors.end() ? 0 : journal_used_it->second
    );
 }
--- a/src/blockstore_journal.h
+++ b/src/blockstore_journal.h
@ -4,7 +4,6 @@
 #pragma once
 #include "crc32c.h"
 #include <set>
 #define MIN_JOURNAL_SIZE 4*1024*1024
 #define JOURNAL_MAGIC 0x4A33
@ -146,21 +145,8 @@ struct journal_sector_info_t
    uint64_t flush_count;
    bool written;
    bool dirty;
    uint64_t submit_id;
 };
 struct pending_journaling_t
 {
    uint64_t flush_id;
    int sector;
    blockstore_op_t *op;
 };
 inline bool operator < (const pending_journaling_t & a, const pending_journaling_t & b)
 {
    return a.flush_id < b.flush_id || a.flush_id == b.flush_id && a.op < b.op;
 }
 struct journal_t
 {
    int fd;
@ -186,9 +172,6 @@ struct journal_t
    bool no_same_sector_overwrites = false;
    int cur_sector = 0;
    int in_sector_pos = 0;
    std::vector<int> submitting_sectors;
    std::set<pending_journaling_t> flushing_ops;
    uint64_t submit_id = 0;
    // Used sector map
    // May use ~ 80 MB per 1 GB of used journal space in the worst case
@ -197,7 +180,6 @@ struct journal_t
    ~journal_t();
    bool trim();
    uint64_t get_trim_pos();
    void dump_diagnostics();
    inline bool entry_fits(int size)
    {
        return !(block_size - in_sector_pos < size ||
@ -217,3 +199,5 @@ struct blockstore_journal_check_t
 };
 journal_entry* prefill_single_journal_entry(journal_t & journal, uint16_t type, uint32_t size);
 void prepare_journal_sector_write(journal_t & journal, int sector, io_uring_sqe *sqe, std::function<void(ring_data_t*)> cb);
--- a/src/blockstore_open.cpp
+++ b/src/blockstore_open.cpp
@ -295,9 +295,9 @@ void blockstore_impl_t::calc_lengths()
    }
 }
-static void check_size(int fd, uint64_t *size, uint64_t *sectsize, std::string name)
+void check_size(int fd, uint64_t *size, std::string name)
 {
-    int sect;
+    int sectsize;
    struct stat st;
    if (fstat(fd, &st) < 0)
    {
@ -306,21 +306,14 @@ static void check_size(int fd, uint64_t *size, uint64_t *sectsize, std::string n
    if (S_ISREG(st.st_mode))
    {
        *size = st.st_size;
        if (sectsize)
        {
            *sectsize = st.st_blksize;
        }
    }
    else if (S_ISBLK(st.st_mode))
    {
-        if (ioctl(fd, BLKGETSIZE64, size) < 0 ||
+        if (ioctl(fd, BLKSSZGET, &sectsize) < 0 ||
-            ioctl(fd, BLKSSZGET, &sect) < 0)
+            ioctl(fd, BLKGETSIZE64, size) < 0 ||
            sectsize != 512)
        {
-            throw std::runtime_error("failed to get "+name+" size or block size: "+strerror(errno));
+            throw std::runtime_error(name+" sector is not equal to 512 bytes");
        }
        if (sectsize)
        {
            *sectsize = sect;
        }
    }
    else
@ -336,14 +329,7 @@ void blockstore_impl_t::open_data()
    {
        throw std::runtime_error("Failed to open data device");
    }
-    check_size(data_fd, &data_size, &data_device_sect, "data device");
+    check_size(data_fd, &data_size, "data device");
    if (disk_alignment % data_device_sect)
    {
        throw std::runtime_error(
            "disk_alignment ("+std::to_string(disk_alignment)+
            ") is not a multiple of data device sector size ("+std::to_string(data_device_sect)+")"
        );
    }
    if (data_offset >= data_size)
    {
        throw std::runtime_error("data_offset exceeds device size = "+std::to_string(data_size));
@ -364,7 +350,7 @@ void blockstore_impl_t::open_meta()
        {
            throw std::runtime_error("Failed to open metadata device");
        }
-        check_size(meta_fd, &meta_size, &meta_device_sect, "metadata device");
+        check_size(meta_fd, &meta_size, "metadata device");
        if (meta_offset >= meta_size)
        {
            throw std::runtime_error("meta_offset exceeds device size = "+std::to_string(meta_size));
@ -377,20 +363,12 @@ void blockstore_impl_t::open_meta()
    else
    {
        meta_fd = data_fd;
        meta_device_sect = data_device_sect;
        meta_size = 0;
        if (meta_offset >= data_size)
        {
            throw std::runtime_error("meta_offset exceeds device size = "+std::to_string(data_size));
        }
    }
    if (meta_block_size % meta_device_sect)
    {
        throw std::runtime_error(
            "meta_block_size ("+std::to_string(meta_block_size)+
            ") is not a multiple of data device sector size ("+std::to_string(meta_device_sect)+")"
        );
    }
 }
 void blockstore_impl_t::open_journal()
@ -402,7 +380,7 @@ void blockstore_impl_t::open_journal()
        {
            throw std::runtime_error("Failed to open journal device");
        }
-        check_size(journal.fd, &journal.device_size, &journal_device_sect, "journal device");
+        check_size(journal.fd, &journal.device_size, "journal device");
        if (!disable_flock && flock(journal.fd, LOCK_EX|LOCK_NB) != 0)
        {
            throw std::runtime_error(std::string("Failed to lock journal device: ") + strerror(errno));
@ -411,7 +389,6 @@ void blockstore_impl_t::open_journal()
    else
    {
        journal.fd = meta_fd;
        journal_device_sect = meta_device_sect;
        journal.device_size = 0;
        if (journal.offset >= data_size)
        {
@ -429,11 +406,4 @@ void blockstore_impl_t::open_journal()
        if (!journal.sector_buf)
            throw std::bad_alloc();
    }
    if (journal_block_size % journal_device_sect)
    {
        throw std::runtime_error(
            "journal_block_size ("+std::to_string(journal_block_size)+
            ") is not a multiple of journal device sector size ("+std::to_string(journal_device_sect)+")"
        );
    }
 }
--- a/src/blockstore_rollback.cpp
+++ b/src/blockstore_rollback.cpp
@ -74,17 +74,24 @@ skip_ov:
    {
        return 0;
    }
-    // There is sufficient space. Check SQEs
+    // There is sufficient space. Get SQEs
-    BS_SUBMIT_CHECK_SQES(space_check.sectors_to_write);
+    struct io_uring_sqe *sqe[space_check.sectors_to_write];
    for (i = 0; i < space_check.sectors_to_write; i++)
    {
        BS_SUBMIT_GET_SQE_DECL(sqe[i]);
    }
    // Prepare and submit journal entries
-    int s = 0;
+    auto cb = [this, op](ring_data_t *data) { handle_rollback_event(data, op); };
    int s = 0, cur_sector = -1;
    for (i = 0, v = (obj_ver_id*)op->buf; i < op->len; i++, v++)
    {
        if (!journal.entry_fits(sizeof(journal_entry_rollback)) &&
            journal.sector_info[journal.cur_sector].dirty)
        {
-            prepare_journal_sector_write(journal.cur_sector, op);
+            if (cur_sector == -1)
-            s++;
+                PRIV(op)->min_flushed_journal_sector = 1 + journal.cur_sector;
            prepare_journal_sector_write(journal, journal.cur_sector, sqe[s++], cb);
            cur_sector = journal.cur_sector;
        }
        journal_entry_rollback *je = (journal_entry_rollback*)
            prefill_single_journal_entry(journal, JE_ROLLBACK, sizeof(journal_entry_rollback));
@ -93,9 +100,12 @@ skip_ov:
        je->crc32 = je_crc32((journal_entry*)je);
        journal.crc32_last = je->crc32;
    }
-    prepare_journal_sector_write(journal.cur_sector, op);
+    prepare_journal_sector_write(journal, journal.cur_sector, sqe[s++], cb);
    s++;
    assert(s == space_check.sectors_to_write);
    if (cur_sector == -1)
        PRIV(op)->min_flushed_journal_sector = 1 + journal.cur_sector;
    PRIV(op)->max_flushed_journal_sector = 1 + journal.cur_sector;
    PRIV(op)->pending_ops = s;
    PRIV(op)->op_state = 1;
    return 1;
 }
@ -104,23 +114,30 @@ int blockstore_impl_t::continue_rollback(blockstore_op_t *op)
 {
    if (PRIV(op)->op_state == 2)
        goto resume_2;
-    else if (PRIV(op)->op_state == 4)
+    else if (PRIV(op)->op_state == 3)
-        goto resume_4;
+        goto resume_3;
    else if (PRIV(op)->op_state == 5)
        goto resume_5;
    else
        return 1;
 resume_2:
    // Release used journal sectors
    release_journal_sectors(op);
 resume_3:
    if (!disable_journal_fsync)
    {
-        BS_SUBMIT_GET_SQE(sqe, data);
+        io_uring_sqe *sqe;
        BS_SUBMIT_GET_SQE_DECL(sqe);
        ring_data_t *data = ((ring_data_t*)sqe->user_data);
        my_uring_prep_fsync(sqe, journal.fd, IORING_FSYNC_DATASYNC);
        data->iov = { 0 };
-        data->callback = [this, op](ring_data_t *data) { handle_write_event(data, op); };
+        data->callback = [this, op](ring_data_t *data) { handle_rollback_event(data, op); };
        PRIV(op)->min_flushed_journal_sector = PRIV(op)->max_flushed_journal_sector = 0;
        PRIV(op)->pending_ops = 1;
-        PRIV(op)->op_state = 3;
+        PRIV(op)->op_state = 4;
        return 1;
    }
-resume_4:
+resume_5:
    obj_ver_id* v;
    int i;
    for (i = 0, v = (obj_ver_id*)op->buf; i < op->len; i++, v++)
@ -179,6 +196,24 @@ void blockstore_impl_t::mark_rolled_back(const obj_ver_id & ov)
    }
 }
 void blockstore_impl_t::handle_rollback_event(ring_data_t *data, blockstore_op_t *op)
 {
    live = true;
    if (data->res != data->iov.iov_len)
    {
        throw std::runtime_error(
            "write operation failed ("+std::to_string(data->res)+" != "+std::to_string(data->iov.iov_len)+
            "). in-memory state is corrupted. AAAAAAAaaaaaaaaa!!!111"
        );
    }
    PRIV(op)->pending_ops--;
    if (PRIV(op)->pending_ops == 0)
    {
        PRIV(op)->op_state++;
        ringloop->wakeup();
    }
 }
 void blockstore_impl_t::erase_dirty(blockstore_dirty_db_t::iterator dirty_start, blockstore_dirty_db_t::iterator dirty_end, uint64_t clean_loc)
 {
    if (dirty_end == dirty_start)
--- a/src/blockstore_stable.cpp
+++ b/src/blockstore_stable.cpp
@ -97,18 +97,25 @@ int blockstore_impl_t::dequeue_stable(blockstore_op_t *op)
    {
        return 0;
    }
-    // There is sufficient space. Check SQEs
+    // There is sufficient space. Get SQEs
-    BS_SUBMIT_CHECK_SQES(space_check.sectors_to_write);
+    struct io_uring_sqe *sqe[space_check.sectors_to_write];
    for (i = 0; i < space_check.sectors_to_write; i++)
    {
        BS_SUBMIT_GET_SQE_DECL(sqe[i]);
    }
    // Prepare and submit journal entries
-    int s = 0;
+    auto cb = [this, op](ring_data_t *data) { handle_stable_event(data, op); };
    int s = 0, cur_sector = -1;
    for (i = 0, v = (obj_ver_id*)op->buf; i < op->len; i++, v++)
    {
        // FIXME: Only stabilize versions that aren't stable yet
        if (!journal.entry_fits(sizeof(journal_entry_stable)) &&
            journal.sector_info[journal.cur_sector].dirty)
        {
-            prepare_journal_sector_write(journal.cur_sector, op);
+            if (cur_sector == -1)
-            s++;
+                PRIV(op)->min_flushed_journal_sector = 1 + journal.cur_sector;
            prepare_journal_sector_write(journal, journal.cur_sector, sqe[s++], cb);
            cur_sector = journal.cur_sector;
        }
        journal_entry_stable *je = (journal_entry_stable*)
            prefill_single_journal_entry(journal, JE_STABLE, sizeof(journal_entry_stable));
@ -117,9 +124,12 @@ int blockstore_impl_t::dequeue_stable(blockstore_op_t *op)
        je->crc32 = je_crc32((journal_entry*)je);
        journal.crc32_last = je->crc32;
    }
-    prepare_journal_sector_write(journal.cur_sector, op);
+    prepare_journal_sector_write(journal, journal.cur_sector, sqe[s++], cb);
    s++;
    assert(s == space_check.sectors_to_write);
    if (cur_sector == -1)
        PRIV(op)->min_flushed_journal_sector = 1 + journal.cur_sector;
    PRIV(op)->max_flushed_journal_sector = 1 + journal.cur_sector;
    PRIV(op)->pending_ops = s;
    PRIV(op)->op_state = 1;
    return 1;
 }
@ -128,23 +138,30 @@ int blockstore_impl_t::continue_stable(blockstore_op_t *op)
 {
    if (PRIV(op)->op_state == 2)
        goto resume_2;
-    else if (PRIV(op)->op_state == 4)
+    else if (PRIV(op)->op_state == 3)
-        goto resume_4;
+        goto resume_3;
    else if (PRIV(op)->op_state == 5)
        goto resume_5;
    else
        return 1;
 resume_2:
    // Release used journal sectors
    release_journal_sectors(op);
 resume_3:
    if (!disable_journal_fsync)
    {
-        BS_SUBMIT_GET_SQE(sqe, data);
+        io_uring_sqe *sqe;
        BS_SUBMIT_GET_SQE_DECL(sqe);
        ring_data_t *data = ((ring_data_t*)sqe->user_data);
        my_uring_prep_fsync(sqe, journal.fd, IORING_FSYNC_DATASYNC);
        data->iov = { 0 };
-        data->callback = [this, op](ring_data_t *data) { handle_write_event(data, op); };
+        data->callback = [this, op](ring_data_t *data) { handle_stable_event(data, op); };
        PRIV(op)->min_flushed_journal_sector = PRIV(op)->max_flushed_journal_sector = 0;
        PRIV(op)->pending_ops = 1;
-        PRIV(op)->op_state = 3;
+        PRIV(op)->op_state = 4;
        return 1;
    }
-resume_4:
+resume_5:
    // Mark dirty_db entries as stable, acknowledge op completion
    obj_ver_id* v;
    int i;
@ -240,3 +257,21 @@ void blockstore_impl_t::mark_stable(const obj_ver_id & v, bool forget_dirty)
        unstable_writes.erase(unstab_it);
    }
 }
 void blockstore_impl_t::handle_stable_event(ring_data_t *data, blockstore_op_t *op)
 {
    live = true;
    if (data->res != data->iov.iov_len)
    {
        throw std::runtime_error(
            "write operation failed ("+std::to_string(data->res)+" != "+std::to_string(data->iov.iov_len)+
            "). in-memory state is corrupted. AAAAAAAaaaaaaaaa!!!111"
        );
    }
    PRIV(op)->pending_ops--;
    if (PRIV(op)->pending_ops == 0)
    {
        PRIV(op)->op_state++;
        ringloop->wakeup();
    }
 }
--- a/src/blockstore_sync.cpp
+++ b/src/blockstore_sync.cpp
@ -44,8 +44,10 @@ int blockstore_impl_t::continue_sync(blockstore_op_t *op, bool queue_has_in_prog
        if (journal.sector_info[journal.cur_sector].dirty)
        {
            // Write out the last journal sector if it happens to be dirty
-            BS_SUBMIT_CHECK_SQES(1);
+            BS_SUBMIT_GET_ONLY_SQE(sqe);
-            prepare_journal_sector_write(journal.cur_sector, op);
+            prepare_journal_sector_write(journal, journal.cur_sector, sqe, [this, op](ring_data_t *data) { handle_sync_event(data, op); });
            PRIV(op)->min_flushed_journal_sector = PRIV(op)->max_flushed_journal_sector = 1 + journal.cur_sector;
            PRIV(op)->pending_ops = 1;
            PRIV(op)->op_state = SYNC_JOURNAL_WRITE_SENT;
            return 1;
        }
@ -62,7 +64,7 @@ int blockstore_impl_t::continue_sync(blockstore_op_t *op, bool queue_has_in_prog
            BS_SUBMIT_GET_SQE(sqe, data);
            my_uring_prep_fsync(sqe, data_fd, IORING_FSYNC_DATASYNC);
            data->iov = { 0 };
-            data->callback = [this, op](ring_data_t *data) { handle_write_event(data, op); };
+            data->callback = [this, op](ring_data_t *data) { handle_sync_event(data, op); };
            PRIV(op)->min_flushed_journal_sector = PRIV(op)->max_flushed_journal_sector = 0;
            PRIV(op)->pending_ops = 1;
            PRIV(op)->op_state = SYNC_DATA_SYNC_SENT;
@ -83,18 +85,24 @@ int blockstore_impl_t::continue_sync(blockstore_op_t *op, bool queue_has_in_prog
        {
            return 0;
        }
-        // Check SQEs. Don't bother about merging, submit each journal sector as a separate request
+        // Get SQEs. Don't bother about merging, submit each journal sector as a separate request
-        BS_SUBMIT_CHECK_SQES(space_check.sectors_to_write);
+        struct io_uring_sqe *sqe[space_check.sectors_to_write];
        for (int i = 0; i < space_check.sectors_to_write; i++)
        {
            BS_SUBMIT_GET_SQE_DECL(sqe[i]);
        }
        // Prepare and submit journal entries
        auto it = PRIV(op)->sync_big_writes.begin();
-        int s = 0;
+        int s = 0, cur_sector = -1;
        while (it != PRIV(op)->sync_big_writes.end())
        {
            if (!journal.entry_fits(sizeof(journal_entry_big_write) + clean_entry_bitmap_size) &&
                journal.sector_info[journal.cur_sector].dirty)
            {
-                prepare_journal_sector_write(journal.cur_sector, op);
+                if (cur_sector == -1)
-                s++;
+                    PRIV(op)->min_flushed_journal_sector = 1 + journal.cur_sector;
                prepare_journal_sector_write(journal, journal.cur_sector, sqe[s++], [this, op](ring_data_t *data) { handle_sync_event(data, op); });
                cur_sector = journal.cur_sector;
            }
            auto & dirty_entry = dirty_db.at(*it);
            journal_entry_big_write *je = (journal_entry_big_write*)prefill_single_journal_entry(
@ -121,9 +129,12 @@ int blockstore_impl_t::continue_sync(blockstore_op_t *op, bool queue_has_in_prog
            journal.crc32_last = je->crc32;
            it++;
        }
-        prepare_journal_sector_write(journal.cur_sector, op);
+        prepare_journal_sector_write(journal, journal.cur_sector, sqe[s++], [this, op](ring_data_t *data) { handle_sync_event(data, op); });
        s++;
        assert(s == space_check.sectors_to_write);
        if (cur_sector == -1)
            PRIV(op)->min_flushed_journal_sector = 1 + journal.cur_sector;
        PRIV(op)->max_flushed_journal_sector = 1 + journal.cur_sector;
        PRIV(op)->pending_ops = s;
        PRIV(op)->op_state = SYNC_JOURNAL_WRITE_SENT;
        return 1;
    }
@ -134,7 +145,7 @@ int blockstore_impl_t::continue_sync(blockstore_op_t *op, bool queue_has_in_prog
            BS_SUBMIT_GET_SQE(sqe, data);
            my_uring_prep_fsync(sqe, journal.fd, IORING_FSYNC_DATASYNC);
            data->iov = { 0 };
-            data->callback = [this, op](ring_data_t *data) { handle_write_event(data, op); };
+            data->callback = [this, op](ring_data_t *data) { handle_sync_event(data, op); };
            PRIV(op)->min_flushed_journal_sector = PRIV(op)->max_flushed_journal_sector = 0;
            PRIV(op)->pending_ops = 1;
            PRIV(op)->op_state = SYNC_JOURNAL_SYNC_SENT;
@ -153,6 +164,42 @@ int blockstore_impl_t::continue_sync(blockstore_op_t *op, bool queue_has_in_prog
    return 1;
 }
 void blockstore_impl_t::handle_sync_event(ring_data_t *data, blockstore_op_t *op)
 {
    live = true;
    if (data->res != data->iov.iov_len)
    {
        throw std::runtime_error(
            "write operation failed ("+std::to_string(data->res)+" != "+std::to_string(data->iov.iov_len)+
            "). in-memory state is corrupted. AAAAAAAaaaaaaaaa!!!111"
        );
    }
    PRIV(op)->pending_ops--;
    if (PRIV(op)->pending_ops == 0)
    {
        // Release used journal sectors
        release_journal_sectors(op);
        // Handle states
        if (PRIV(op)->op_state == SYNC_DATA_SYNC_SENT)
        {
            PRIV(op)->op_state = SYNC_DATA_SYNC_DONE;
        }
        else if (PRIV(op)->op_state == SYNC_JOURNAL_WRITE_SENT)
        {
            PRIV(op)->op_state = SYNC_JOURNAL_WRITE_DONE;
        }
        else if (PRIV(op)->op_state == SYNC_JOURNAL_SYNC_SENT)
        {
            PRIV(op)->op_state = SYNC_DONE;
        }
        else
        {
            throw std::runtime_error("BUG: unexpected sync op state");
        }
        ringloop->wakeup();
    }
 }
 void blockstore_impl_t::ack_sync(blockstore_op_t *op)
 {
    // Handle states
--- a/src/blockstore_write.cpp
+++ b/src/blockstore_write.cpp
@ -268,8 +268,8 @@ int blockstore_impl_t::dequeue_write(blockstore_op_t *op)
            cancel_all_writes(op, dirty_it, -ENOSPC);
            return 2;
        }
        BS_SUBMIT_GET_SQE(sqe, data);
        write_iodepth++;
        BS_SUBMIT_GET_SQE(sqe, data);
        dirty_it->second.location = loc << block_order;
        dirty_it->second.state = (dirty_it->second.state & ~BS_ST_WORKFLOW_MASK) | BS_ST_SUBMITTED;
 #ifdef BLOCKSTORE_DEBUG
@ -324,21 +324,29 @@ int blockstore_impl_t::dequeue_write(blockstore_op_t *op)
        {
            return 0;
        }
        // There is sufficient space. Check SQE(s)
        BS_SUBMIT_CHECK_SQES(
            // Write current journal sector only if it's dirty and full, or in the immediate_commit mode
            (immediate_commit != IMMEDIATE_NONE ||
                !journal.entry_fits(sizeof(journal_entry_small_write) + clean_entry_bitmap_size) ? 1 : 0) +
            (op->len > 0 ? 1 : 0)
        );
        write_iodepth++;
        // There is sufficient space. Get SQE(s)
        struct io_uring_sqe *sqe1 = NULL;
        if (immediate_commit != IMMEDIATE_NONE ||
            !journal.entry_fits(sizeof(journal_entry_small_write) + clean_entry_bitmap_size))
        {
            // Write current journal sector only if it's dirty and full, or in the immediate_commit mode
            BS_SUBMIT_GET_SQE_DECL(sqe1);
        }
        struct io_uring_sqe *sqe2 = NULL;
        if (op->len > 0)
        {
            BS_SUBMIT_GET_SQE_DECL(sqe2);
        }
        // Got SQEs. Prepare previous journal sector write if required
        auto cb = [this, op](ring_data_t *data) { handle_write_event(data, op); };
        if (immediate_commit == IMMEDIATE_NONE)
        {
-            if (!journal.entry_fits(sizeof(journal_entry_small_write) + clean_entry_bitmap_size))
+            if (sqe1)
            {
-                prepare_journal_sector_write(journal.cur_sector, op);
+                prepare_journal_sector_write(journal, journal.cur_sector, sqe1, cb);
                PRIV(op)->min_flushed_journal_sector = PRIV(op)->max_flushed_journal_sector = 1 + journal.cur_sector;
                PRIV(op)->pending_ops++;
            }
            else
            {
@ -372,7 +380,9 @@ int blockstore_impl_t::dequeue_write(blockstore_op_t *op)
        journal.crc32_last = je->crc32;
        if (immediate_commit != IMMEDIATE_NONE)
        {
-            prepare_journal_sector_write(journal.cur_sector, op);
+            prepare_journal_sector_write(journal, journal.cur_sector, sqe1, cb);
            PRIV(op)->min_flushed_journal_sector = PRIV(op)->max_flushed_journal_sector = 1 + journal.cur_sector;
            PRIV(op)->pending_ops++;
        }
        if (op->len > 0)
        {
@ -382,7 +392,7 @@ int blockstore_impl_t::dequeue_write(blockstore_op_t *op)
                // Copy data
                memcpy(journal.buffer + journal.next_free, op->buf, op->len);
            }
-            BS_SUBMIT_GET_SQE(sqe2, data2);
+            ring_data_t *data2 = ((ring_data_t*)sqe2->user_data);
            data2->iov = (struct iovec){ op->buf, op->len };
            data2->callback = cb;
            my_uring_prep_writev(
@ -431,12 +441,13 @@ int blockstore_impl_t::continue_write(blockstore_op_t *op)
 resume_2:
    // Only for the immediate_commit mode: prepare and submit big_write journal entry
    {
        BS_SUBMIT_CHECK_SQES(1);
        auto dirty_it = dirty_db.find((obj_ver_id){
            .oid = op->oid,
            .version = op->version,
        });
        assert(dirty_it != dirty_db.end());
        io_uring_sqe *sqe = NULL;
        BS_SUBMIT_GET_SQE_DECL(sqe);
        journal_entry_big_write *je = (journal_entry_big_write*)prefill_single_journal_entry(
            journal, op->opcode == BS_OP_WRITE_STABLE ? JE_BIG_WRITE_INSTANT : JE_BIG_WRITE,
            sizeof(journal_entry_big_write) + clean_entry_bitmap_size
@ -458,21 +469,24 @@ resume_2:
        memcpy((void*)(je+1), (clean_entry_bitmap_size > sizeof(void*) ? dirty_it->second.bitmap : &dirty_it->second.bitmap), clean_entry_bitmap_size);
        je->crc32 = je_crc32((journal_entry*)je);
        journal.crc32_last = je->crc32;
-        prepare_journal_sector_write(journal.cur_sector, op);
+        prepare_journal_sector_write(journal, journal.cur_sector, sqe,
            [this, op](ring_data_t *data) { handle_write_event(data, op); });
        PRIV(op)->min_flushed_journal_sector = PRIV(op)->max_flushed_journal_sector = 1 + journal.cur_sector;
        PRIV(op)->pending_ops = 1;
        PRIV(op)->op_state = 3;
        return 1;
    }
 resume_4:
    // Switch object state
 #ifdef BLOCKSTORE_DEBUG
    printf("Ack write %lx:%lx v%lu = state 0x%x\n", op->oid.inode, op->oid.stripe, op->version, dirty_it->second.state);
 #endif
    {
        auto dirty_it = dirty_db.find((obj_ver_id){
            .oid = op->oid,
            .version = op->version,
        });
        assert(dirty_it != dirty_db.end());
 #ifdef BLOCKSTORE_DEBUG
        printf("Ack write %lx:%lx v%lu = state 0x%x\n", op->oid.inode, op->oid.stripe, op->version, dirty_it->second.state);
 #endif
        bool is_big = (dirty_it->second.state & BS_ST_TYPE_MASK) == BS_ST_BIG_WRITE;
        bool imm = is_big ? (immediate_commit == IMMEDIATE_ALL) : (immediate_commit != IMMEDIATE_NONE);
        if (imm)
@ -573,7 +587,6 @@ void blockstore_impl_t::handle_write_event(ring_data_t *data, blockstore_op_t *o
        );
    }
    PRIV(op)->pending_ops--;
    assert(PRIV(op)->pending_ops >= 0);
    if (PRIV(op)->pending_ops == 0)
    {
        release_journal_sectors(op);
@ -591,6 +604,7 @@ void blockstore_impl_t::release_journal_sectors(blockstore_op_t *op)
        uint64_t s = PRIV(op)->min_flushed_journal_sector;
        while (1)
        {
            journal.sector_info[s-1].flush_count--;
            if (s != (1+journal.cur_sector) && journal.sector_info[s-1].flush_count == 0)
            {
                // We know for sure that we won't write into this sector anymore
@ -630,19 +644,23 @@ int blockstore_impl_t::dequeue_del(blockstore_op_t *op)
        return 0;
    }
    write_iodepth++;
-    // Write current journal sector only if it's dirty and full, or in the immediate_commit mode
+    io_uring_sqe *sqe = NULL;
-    BS_SUBMIT_CHECK_SQES(
+    if (immediate_commit != IMMEDIATE_NONE ||
        (immediate_commit != IMMEDIATE_NONE ||
        (journal_block_size - journal.in_sector_pos) < sizeof(journal_entry_del) &&
-            journal.sector_info[journal.cur_sector].dirty) ? 1 : 0
+        journal.sector_info[journal.cur_sector].dirty)
-    );
+    {
        // Write current journal sector only if it's dirty and full, or in the immediate_commit mode
        BS_SUBMIT_GET_SQE_DECL(sqe);
    }
    auto cb = [this, op](ring_data_t *data) { handle_write_event(data, op); };
    // Prepare journal sector write
    if (immediate_commit == IMMEDIATE_NONE)
    {
-        if ((journal_block_size - journal.in_sector_pos) < sizeof(journal_entry_del) &&
+        if (sqe)
            journal.sector_info[journal.cur_sector].dirty)
        {
-            prepare_journal_sector_write(journal.cur_sector, op);
+            prepare_journal_sector_write(journal, journal.cur_sector, sqe, cb);
            PRIV(op)->min_flushed_journal_sector = PRIV(op)->max_flushed_journal_sector = 1 + journal.cur_sector;
            PRIV(op)->pending_ops++;
        }
        else
        {
@ -669,7 +687,9 @@ int blockstore_impl_t::dequeue_del(blockstore_op_t *op)
    dirty_it->second.state = BS_ST_DELETE | BS_ST_SUBMITTED;
    if (immediate_commit != IMMEDIATE_NONE)
    {
-        prepare_journal_sector_write(journal.cur_sector, op);
+        prepare_journal_sector_write(journal, journal.cur_sector, sqe, cb);
        PRIV(op)->min_flushed_journal_sector = PRIV(op)->max_flushed_journal_sector = 1 + journal.cur_sector;
        PRIV(op)->pending_ops++;
    }
    if (!PRIV(op)->pending_ops)
    {
--- a/src/cli.cpp
+++ b/src/cli.cpp
@ -1,362 +0,0 @@
 // Copyright (c) Vitaliy Filippov, 2019+
 // License: VNPL-1.1 (see README.md for details)
 /**
 * CLI tool
 * Currently can (a) remove inodes and (b) merge snapshot/clone layers
 */
 #include <vector>
 #include <algorithm>
 #include "cli.h"
 #include "epoll_manager.h"
 #include "cluster_client.h"
 #include "pg_states.h"
 #include "base64.h"
 static const char *exe_name = NULL;
 json11::Json::object cli_tool_t::parse_args(int narg, const char *args[])
 {
    json11::Json::object cfg;
    json11::Json::array cmd;
    cfg["progress"] = "1";
    for (int i = 1; i < narg; i++)
    {
        if (!strcmp(args[i], "-h") || !strcmp(args[i], "--help"))
        {
            help();
        }
        else if (args[i][0] == '-' && args[i][1] == 'l')
        {
            cfg["long"] = "1";
        }
        else if (args[i][0] == '-' && args[i][1] == 'n')
        {
            cfg["count"] = args[++i];
        }
        else if (args[i][0] == '-' && args[i][1] == 'p')
        {
            cfg["pool"] = args[++i];
        }
        else if (args[i][0] == '-' && args[i][1] == 's')
        {
            cfg["size"] = args[++i];
        }
        else if (args[i][0] == '-' && args[i][1] == 'r')
        {
            cfg["reverse"] = "1";
        }
        else if (args[i][0] == '-' && args[i][1] == 'f')
        {
            cfg["force"] = "1";
        }
        else if (args[i][0] == '-' && args[i][1] == '-')
        {
            const char *opt = args[i]+2;
            cfg[opt] = i == narg-1 || !strcmp(opt, "json") || !strcmp(opt, "wait-list") ||
                !strcmp(opt, "long") || !strcmp(opt, "del") || !strcmp(opt, "no-color") ||
                !strcmp(opt, "readonly") || !strcmp(opt, "readwrite") ||
                !strcmp(opt, "force") || !strcmp(opt, "reverse") ||
                !strcmp(opt, "writers-stopped") && strcmp("1", args[i+1]) != 0
                ? "1" : args[++i];
        }
        else
        {
            cmd.push_back(std::string(args[i]));
        }
    }
    if (!cmd.size())
    {
        std::string exe(exe_name);
        if (exe.size() >= 11 && exe.substr(exe.size()-11) == "vitastor-rm")
        {
            cmd.push_back("rm-data");
        }
    }
    cfg["command"] = cmd;
    return cfg;
 }
 void cli_tool_t::help()
 {
    printf(
        "Vitastor command-line tool\n"
        "(c) Vitaliy Filippov, 2019+ (VNPL-1.1)\n"
        "\n"
        "USAGE:\n"
        "%s df\n"
        "  Show pool space statistics\n"
        "\n"
        "%s ls [-l] [-p POOL] [--sort FIELD] [-r] [-n N] [<glob> ...]\n"
        "  List images (only matching <glob> patterns if passed).\n"
        "  -p|--pool POOL  Filter images by pool ID or name\n"
        "  -l|--long       Also report allocated size and I/O statistics\n"
        "  --del           Also include delete operation statistics\n"
        "  --sort FIELD    Sort by specified field (name, size, used_size, <read|write|delete>_<iops|bps|lat|queue>)\n"
        "  -r|--reverse    Sort in descending order\n"
        "  -n|--count N    Only list first N items\n"
        "\n"
        "%s create -s|--size <size> [-p|--pool <id|name>] [--parent <parent_name>[@<snapshot>]] <name>\n"
        "  Create an image. You may use K/M/G/T suffixes for <size>. If --parent is specified,\n"
        "  a copy-on-write image clone is created. Parent must be a snapshot (readonly image).\n"
        "  Pool must be specified if there is more than one pool.\n"
        "\n"
        "%s create --snapshot <snapshot> [-p|--pool <id|name>] <image>\n"
        "%s snap-create [-p|--pool <id|name>] <image>@<snapshot>\n"
        "  Create a snapshot of image <name>. May be used live if only a single writer is active.\n"
        "\n"
        "%s modify <name> [--rename <new-name>] [--resize <size>] [--readonly | --readwrite] [-f|--force]\n"
        "  Rename, resize image or change its readonly status. Images with children can't be made read-write.\n"
        "  If the new size is smaller than the old size, extra data will be purged.\n"
        "  You should resize file system in the image, if present, before shrinking it.\n"
        "  -f|--force  Proceed with shrinking or setting readwrite flag even if the image has children.\n"
        "\n"
        "%s rm <from> [<to>] [--writers-stopped]\n"
        "  Remove <from> or all layers between <from> and <to> (<to> must be a child of <from>),\n"
        "  rebasing all their children accordingly. --writers-stopped allows merging to be a bit\n"
        "  more effective in case of a single 'slim' read-write child and 'fat' removed parent:\n"
        "  the child is merged into parent and parent is renamed to child in that case.\n"
        "  In other cases parent layers are always merged into children.\n"
        "\n"
        "%s flatten <layer>\n"
        "  Flatten a layer, i.e. merge data and detach it from parents.\n"
        "\n"
        "%s rm-data --pool <pool> --inode <inode> [--wait-list] [--min-offset <offset>]\n"
        "  Remove inode data without changing metadata.\n"
        "  --wait-list   Retrieve full objects listings before starting to remove objects.\n"
        "                Requires more memory, but allows to show correct removal progress.\n"
        "  --min-offset  Purge only data starting with specified offset.\n"
        "\n"
        "%s merge-data <from> <to> [--target <target>]\n"
        "  Merge layer data without changing metadata. Merge <from>..<to> to <target>.\n"
        "  <to> must be a child of <from> and <target> may be one of the layers between\n"
        "  <from> and <to>, including <from> and <to>.\n"
        "\n"
        "%s alloc-osd\n"
        "  Allocate a new OSD number and reserve it by creating empty /osd/stats/<n> key.\n"
        "%s simple-offsets <device>\n"
        "  Calculate offsets for simple&stupid (no superblock) OSD deployment. Options:\n"
        "  --object_size 128k       Set blockstore block size\n"
        "  --bitmap_granularity 4k  Set bitmap granularity\n"
        "  --journal_size 16M       Set journal size\n"
        "  --device_block_size 4k   Set device block size\n"
        "  --journal_offset 0       Set journal offset\n"
        "  --device_size 0          Set device size\n"
        "  --format text            Result format: json, options, env, or text\n"
        "\n"
        "GLOBAL OPTIONS:\n"
        "  --etcd_address <etcd_address>\n"
        "  --iodepth N         Send N operations in parallel to each OSD when possible (default 32)\n"
        "  --parallel_osds M   Work with M osds in parallel when possible (default 4)\n"
        "  --progress 1|0      Report progress (default 1)\n"
        "  --cas 1|0           Use online CAS writes when possible (default auto)\n"
        "  --no-color          Disable colored output\n"
        "  --json              JSON output\n"
        ,
        exe_name, exe_name, exe_name, exe_name, exe_name, exe_name,
        exe_name, exe_name, exe_name, exe_name, exe_name, exe_name
    );
    exit(0);
 }
 void cli_tool_t::change_parent(inode_t cur, inode_t new_parent)
 {
    auto cur_cfg_it = cli->st_cli.inode_config.find(cur);
    if (cur_cfg_it == cli->st_cli.inode_config.end())
    {
        fprintf(stderr, "Inode 0x%lx disappeared\n", cur);
        exit(1);
    }
    inode_config_t new_cfg = cur_cfg_it->second;
    std::string cur_name = new_cfg.name;
    std::string cur_cfg_key = base64_encode(cli->st_cli.etcd_prefix+
        "/config/inode/"+std::to_string(INODE_POOL(cur))+
        "/"+std::to_string(INODE_NO_POOL(cur)));
    new_cfg.parent_id = new_parent;
    json11::Json::object cur_cfg_json = cli->st_cli.serialize_inode_cfg(&new_cfg);
    waiting++;
    cli->st_cli.etcd_txn(json11::Json::object {
        { "compare", json11::Json::array {
            json11::Json::object {
                { "target", "MOD" },
                { "key", cur_cfg_key },
                { "result", "LESS" },
                { "mod_revision", new_cfg.mod_revision+1 },
            },
        } },
        { "success", json11::Json::array {
            json11::Json::object {
                { "request_put", json11::Json::object {
                    { "key", cur_cfg_key },
                    { "value", base64_encode(json11::Json(cur_cfg_json).dump()) },
                } }
            },
        } },
    }, ETCD_SLOW_TIMEOUT, [this, new_parent, cur, cur_name](std::string err, json11::Json res)
    {
        if (err != "")
        {
            fprintf(stderr, "Error changing parent of %s: %s\n", cur_name.c_str(), err.c_str());
            exit(1);
        }
        if (!res["succeeded"].bool_value())
        {
            fprintf(stderr, "Inode %s was modified during snapshot deletion\n", cur_name.c_str());
            exit(1);
        }
        if (new_parent)
        {
            auto new_parent_it = cli->st_cli.inode_config.find(new_parent);
            std::string new_parent_name = new_parent_it != cli->st_cli.inode_config.end()
                ? new_parent_it->second.name : "<unknown>";
            printf(
                "Parent of layer %s (inode %lu in pool %u) changed to %s (inode %lu in pool %u)\n",
                cur_name.c_str(), INODE_NO_POOL(cur), INODE_POOL(cur),
                new_parent_name.c_str(), INODE_NO_POOL(new_parent), INODE_POOL(new_parent)
            );
        }
        else
        {
            printf(
                "Parent of layer %s (inode %lu in pool %u) detached\n",
                cur_name.c_str(), INODE_NO_POOL(cur), INODE_POOL(cur)
            );
        }
        waiting--;
        ringloop->wakeup();
    });
 }
 inode_config_t* cli_tool_t::get_inode_cfg(const std::string & name)
 {
    for (auto & ic: cli->st_cli.inode_config)
    {
        if (ic.second.name == name)
        {
            return &ic.second;
        }
    }
    fprintf(stderr, "Layer %s not found\n", name.c_str());
    exit(1);
 }
 void cli_tool_t::run(json11::Json cfg)
 {
    json11::Json::array cmd = cfg["command"].array_items();
    if (!cmd.size())
    {
        fprintf(stderr, "command is missing\n");
        exit(1);
    }
    else if (cmd[0] == "df")
    {
        // Show pool space stats
        action_cb = start_df(cfg);
    }
    else if (cmd[0] == "ls")
    {
        // List images
        action_cb = start_ls(cfg);
    }
    else if (cmd[0] == "create" || cmd[0] == "snap-create")
    {
        // Create image/snapshot
        action_cb = start_create(cfg);
    }
    else if (cmd[0] == "modify")
    {
        // Modify image
        action_cb = start_modify(cfg);
    }
    else if (cmd[0] == "rm-data")
    {
        // Delete inode data
        action_cb = start_rm(cfg);
    }
    else if (cmd[0] == "merge-data")
    {
        // Merge layer data without affecting metadata
        action_cb = start_merge(cfg);
    }
    else if (cmd[0] == "flatten")
    {
        // Merge layer data without affecting metadata
        action_cb = start_flatten(cfg);
    }
    else if (cmd[0] == "rm")
    {
        // Remove multiple snapshots and rebase their children
        action_cb = start_snap_rm(cfg);
    }
    else if (cmd[0] == "alloc-osd")
    {
        // Allocate a new OSD number
        action_cb = start_alloc_osd(cfg);
    }
    else if (cmd[0] == "simple-offsets")
    {
        // Calculate offsets for simple & stupid OSD deployment without superblock
        action_cb = simple_offsets(cfg);
    }
    else
    {
        fprintf(stderr, "unknown command: %s\n", cmd[0].string_value().c_str());
        exit(1);
    }
    if (action_cb == NULL)
    {
        return;
    }
    color = !cfg["no-color"].bool_value();
    json_output = cfg["json"].bool_value();
    iodepth = cfg["iodepth"].uint64_value();
    if (!iodepth)
        iodepth = 32;
    parallel_osds = cfg["parallel_osds"].uint64_value();
    if (!parallel_osds)
        parallel_osds = 4;
    log_level = cfg["log_level"].int64_value();
    progress = cfg["progress"].uint64_value() ? true : false;
    list_first = cfg["wait-list"].uint64_value() ? true : false;
    // Create client
    ringloop = new ring_loop_t(512);
    epmgr = new epoll_manager_t(ringloop);
    cli = new cluster_client_t(ringloop, epmgr->tfd, cfg);
    cli->on_ready([this]()
    {
        // Initialize job
        consumer.loop = [this]()
        {
            if (action_cb != NULL)
            {
                bool done = action_cb();
                if (done)
                {
                    action_cb = NULL;
                }
            }
            ringloop->submit();
        };
        ringloop->register_consumer(&consumer);
        consumer.loop();
    });
    // Loop until it completes
    while (action_cb != NULL)
    {
        ringloop->loop();
        if (action_cb != NULL)
            ringloop->wait();
    }
 }
 int main(int narg, const char *args[])
 {
    setvbuf(stdout, NULL, _IONBF, 0);
    setvbuf(stderr, NULL, _IONBF, 0);
    exe_name = args[0];
    cli_tool_t *p = new cli_tool_t();
    p->run(cli_tool_t::parse_args(narg, args));
    return 0;
 }
--- a/src/cli.h
+++ b/src/cli.h
@ -1,75 +0,0 @@
 // Copyright (c) Vitaliy Filippov, 2019+
 // License: VNPL-1.1 (see README.md for details)
 // Common CLI tool header
 #pragma once
 #include "json11/json11.hpp"
 #include "object_id.h"
 #include "ringloop.h"
 #include <functional>
 struct rm_inode_t;
 struct snap_merger_t;
 struct snap_flattener_t;
 struct snap_remover_t;
 class epoll_manager_t;
 class cluster_client_t;
 struct inode_config_t;
 class cli_tool_t
 {
 public:
    uint64_t iodepth = 0, parallel_osds = 0;
    bool progress = true;
    bool list_first = false;
    bool json_output = false;
    int log_level = 0;
    bool color = false;
    ring_loop_t *ringloop = NULL;
    epoll_manager_t *epmgr = NULL;
    cluster_client_t *cli = NULL;
    int waiting = 0;
    ring_consumer_t consumer;
    std::function<bool(void)> action_cb;
    void run(json11::Json cfg);
    void change_parent(inode_t cur, inode_t new_parent);
    inode_config_t* get_inode_cfg(const std::string & name);
    static json11::Json::object parse_args(int narg, const char *args[]);
    static void help();
    friend struct rm_inode_t;
    friend struct snap_merger_t;
    friend struct snap_flattener_t;
    friend struct snap_remover_t;
    std::function<bool(void)> start_df(json11::Json);
    std::function<bool(void)> start_ls(json11::Json);
    std::function<bool(void)> start_create(json11::Json);
    std::function<bool(void)> start_modify(json11::Json);
    std::function<bool(void)> start_rm(json11::Json);
    std::function<bool(void)> start_merge(json11::Json);
    std::function<bool(void)> start_flatten(json11::Json);
    std::function<bool(void)> start_snap_rm(json11::Json);
    std::function<bool(void)> start_alloc_osd(json11::Json cfg, uint64_t *out = NULL);
    std::function<bool(void)> simple_offsets(json11::Json cfg);
 };
 uint64_t parse_size(std::string size_str);
 std::string print_table(json11::Json items, json11::Json header, bool use_esc);
 std::string format_size(uint64_t size);
 std::string format_lat(uint64_t lat);
 std::string format_q(double depth);
 bool stupid_glob(const std::string str, const std::string glob);
--- a/src/cli_alloc_osd.cpp
+++ b/src/cli_alloc_osd.cpp
@ -1,141 +0,0 @@
 // Copyright (c) Vitaliy Filippov, 2019+
 // License: VNPL-1.1 (see README.md for details)
 #include <ctype.h>
 #include "cli.h"
 #include "cluster_client.h"
 #include "base64.h"
 #include <algorithm>
 // Safely allocate an OSD number
 struct alloc_osd_t
 {
    cli_tool_t *parent;
    json11::Json result;
    uint64_t new_id = 1;
    int state = 0;
    bool is_done()
    {
        return state == 100;
    }
    void loop()
    {
        if (state == 1)
            goto resume_1;
        do
        {
            etcd_txn(json11::Json::object {
                { "compare", json11::Json::array {
                    json11::Json::object {
                        { "target", "VERSION" },
                        { "version", 0 },
                        { "key", base64_encode(
                            parent->cli->st_cli.etcd_prefix+"/osd/stats/"+std::to_string(new_id)
                        ) },
                    },
                } },
                { "success", json11::Json::array {
                    json11::Json::object {
                        { "request_put", json11::Json::object {
                            { "key", base64_encode(
                                parent->cli->st_cli.etcd_prefix+"/osd/stats/"+std::to_string(new_id)
                            ) },
                            { "value", base64_encode("{}") },
                        } },
                    },
                } },
                { "failure", json11::Json::array {
                    json11::Json::object {
                        { "request_range", json11::Json::object {
                            { "key", base64_encode(parent->cli->st_cli.etcd_prefix+"/osd/stats/") },
                            { "range_end", base64_encode(parent->cli->st_cli.etcd_prefix+"/osd/stats0") },
                            { "keys_only", true },
                        } },
                    },
                } },
            });
        resume_1:
            state = 1;
            if (parent->waiting > 0)
                return;
            if (!result["succeeded"].bool_value())
            {
                std::vector<osd_num_t> used;
                for (auto kv: result["responses"][0]["response_range"]["kvs"].array_items())
                {
                    std::string key = base64_decode(kv["key"].string_value());
                    osd_num_t cur_osd;
                    char null_byte = 0;
                    sscanf(key.c_str() + parent->cli->st_cli.etcd_prefix.length(), "/osd/stats/%lu%c", &cur_osd, &null_byte);
                    if (!cur_osd || null_byte != 0)
                    {
                        fprintf(stderr, "Invalid key in etcd: %s\n", key.c_str());
                        continue;
                    }
                    used.push_back(cur_osd);
                }
                std::sort(used.begin(), used.end());
                if (used[used.size()-1] == used.size())
                {
                    new_id = used.size()+1;
                }
                else
                {
                    int s = 0, e = used.size();
                    while (e > s+1)
                    {
                        int c = (s+e)/2;
                        if (used[c] == c+1)
                            s = c;
                        else
                            e = c;
                    }
                    new_id = used[e-1]+1;
                }
            }
        } while (!result["succeeded"].bool_value());
        state = 100;
    }
    void etcd_txn(json11::Json txn)
    {
        parent->waiting++;
        parent->cli->st_cli.etcd_txn(txn, ETCD_SLOW_TIMEOUT, [this](std::string err, json11::Json res)
        {
            parent->waiting--;
            if (err != "")
            {
                fprintf(stderr, "Error reading from etcd: %s\n", err.c_str());
                exit(1);
            }
            this->result = res;
            parent->ringloop->wakeup();
        });
    }
 };
 std::function<bool(void)> cli_tool_t::start_alloc_osd(json11::Json cfg, uint64_t *out)
 {
    json11::Json::array cmd = cfg["command"].array_items();
    auto alloc_osd = new alloc_osd_t();
    alloc_osd->parent = this;
    return [alloc_osd, out]()
    {
        alloc_osd->loop();
        if (alloc_osd->is_done())
        {
            if (out)
                *out = alloc_osd->new_id;
            else if (alloc_osd->new_id)
                printf("%lu\n", alloc_osd->new_id);
            delete alloc_osd;
            return true;
        }
        return false;
    };
 }
--- a/src/cli_create.cpp
+++ b/src/cli_create.cpp
@ -1,553 +0,0 @@
 // Copyright (c) Vitaliy Filippov, 2019+
 // License: VNPL-1.1 (see README.md for details)
 #include <ctype.h>
 #include "cli.h"
 #include "cluster_client.h"
 #include "base64.h"
 // Create an image, snapshot or clone
 //
 // Snapshot creation performs a etcd transaction which:
 // - Checks that the image exists
 // - Checks that the snapshot doesn't exist
 // - Renames the inode to a new name with snapshot (say, testimg -> testimg@0)
 // - Sets the readonly flag for the old inode
 // - Creates a new inode with the same name pointing to the old inode as parent
 // - Adjusts /index/image/*
 //
 // The same algorithm can be easily implemented in any other language or even via etcdctl,
 // however we have it here for completeness
 struct image_creator_t
 {
    cli_tool_t *parent;
    pool_id_t new_pool_id = 0;
    std::string new_pool_name;
    std::string image_name, new_snap, new_parent;
    uint64_t size;
    pool_id_t old_pool_id = 0;
    inode_t new_parent_id = 0;
    inode_t new_id = 0, old_id = 0;
    uint64_t max_id_mod_rev = 0, cfg_mod_rev = 0, idx_mod_rev = 0;
    json11::Json result;
    int state = 0;
    bool is_done()
    {
        return state == 100;
    }
    void loop()
    {
        if (state >= 1)
            goto resume_1;
        if (new_pool_id)
        {
            auto & pools = parent->cli->st_cli.pool_config;
            if (pools.find(new_pool_id) == pools.end())
            {
                fprintf(stderr, "Pool %u does not exist\n", new_pool_id);
                exit(1);
            }
        }
        else if (new_pool_name != "")
        {
            for (auto & ic: parent->cli->st_cli.pool_config)
            {
                if (ic.second.name == new_pool_name)
                {
                    new_pool_id = ic.first;
                    break;
                }
            }
            if (!new_pool_id)
            {
                fprintf(stderr, "Pool %s does not exist\n", new_pool_name.c_str());
                exit(1);
            }
        }
        else if (parent->cli->st_cli.pool_config.size() == 1)
        {
            auto it = parent->cli->st_cli.pool_config.begin();
            new_pool_id = it->first;
        }
        state = 1;
    resume_1:
        if (new_snap == "")
            create_image();
        else
            create_snapshot();
    }
    void create_image()
    {
        if (state == 2)
            goto resume_2;
        else if (state == 3)
            goto resume_3;
        for (auto & ic: parent->cli->st_cli.inode_config)
        {
            if (ic.second.name == image_name)
            {
                fprintf(stderr, "Image %s already exists\n", image_name.c_str());
                exit(1);
            }
            if (ic.second.name == new_parent)
            {
                new_parent_id = ic.second.num;
                if (!new_pool_id)
                {
                    new_pool_id = INODE_POOL(ic.second.num);
                }
                if (!size)
                {
                    size = ic.second.size;
                }
            }
        }
        if (new_parent != "" && !new_parent_id)
        {
            fprintf(stderr, "Parent image not found\n");
            exit(1);
        }
        if (!new_pool_id)
        {
            fprintf(stderr, "Pool name or ID is missing\n");
            exit(1);
        }
        if (!size)
        {
            fprintf(stderr, "Image size is missing\n");
            exit(1);
        }
        do
        {
            etcd_txn(json11::Json::object {
                { "success", json11::Json::array { get_next_id() } }
            });
            state = 2;
 resume_2:
            if (parent->waiting > 0)
                return;
            extract_next_id(result["responses"][0]);
            attempt_create();
            state = 3;
 resume_3:
            if (parent->waiting > 0)
                return;
            if (!result["succeeded"].bool_value() &&
                result["responses"][0]["response_range"]["kvs"].array_items().size() > 0)
            {
                fprintf(stderr, "Image %s already exists\n", image_name.c_str());
                exit(1);
            }
        } while (!result["succeeded"].bool_value());
        if (parent->progress)
        {
            printf("Image %s created\n", image_name.c_str());
        }
        state = 100;
    }
    void create_snapshot()
    {
        if (state == 2)
            goto resume_2;
        else if (state == 3)
            goto resume_3;
        else if (state == 4)
            goto resume_4;
        for (auto & ic: parent->cli->st_cli.inode_config)
        {
            if (ic.second.name == image_name+"@"+new_snap)
            {
                fprintf(stderr, "Snapshot %s@%s already exists\n", image_name.c_str(), new_snap.c_str());
                exit(1);
            }
        }
        if (new_parent != "")
        {
            fprintf(stderr, "--parent can't be used with snapshots\n");
            exit(1);
        }
        do
        {
            // In addition to next_id, get: size, old_id, old_pool_id, new_parent, cfg_mod_rev, idx_mod_rev
 resume_2:
 resume_3:
            get_image_details();
            if (parent->waiting > 0)
                return;
            if (!old_id)
            {
                fprintf(stderr, "Image %s does not exist\n", image_name.c_str());
                exit(1);
            }
            if (!new_pool_id)
            {
                // Create snapshot in the same pool by default
                new_pool_id = old_pool_id;
            }
            attempt_create();
            state = 4;
 resume_4:
            if (parent->waiting > 0)
                return;
            if (!result["succeeded"].bool_value() &&
                result["responses"][0]["response_range"]["kvs"].array_items().size() > 0)
            {
                fprintf(stderr, "Snapshot %s@%s already exists\n", image_name.c_str(), new_snap.c_str());
                exit(1);
            }
        } while (!result["succeeded"].bool_value());
        if (parent->progress)
        {
            printf("Snapshot %s@%s created\n", image_name.c_str(), new_snap.c_str());
        }
        state = 100;
    }
    json11::Json::object get_next_id()
    {
        return json11::Json::object {
            { "request_range", json11::Json::object {
                { "key", base64_encode(
                    parent->cli->st_cli.etcd_prefix+"/index/maxid/"+std::to_string(new_pool_id)
                ) },
            } },
        };
    }
    void extract_next_id(json11::Json response)
    {
        new_id = 1;
        max_id_mod_rev = 0;
        if (response["response_range"]["kvs"].array_items().size() > 0)
        {
            auto kv = parent->cli->st_cli.parse_etcd_kv(response["response_range"]["kvs"][0]);
            new_id = 1+INODE_NO_POOL(kv.value.uint64_value());
            max_id_mod_rev = kv.mod_revision;
        }
        auto ino_it = parent->cli->st_cli.inode_config.lower_bound(INODE_WITH_POOL(new_pool_id, 0));
        if (ino_it != parent->cli->st_cli.inode_config.begin())
        {
            ino_it--;
            if (INODE_POOL(ino_it->first) == new_pool_id && new_id < 1+INODE_NO_POOL(ino_it->first))
                new_id = 1+INODE_NO_POOL(ino_it->first);
        }
    }
    void get_image_details()
    {
        if (state == 2)
            goto resume_2;
        else if (state == 3)
            goto resume_3;
        etcd_txn(json11::Json::object { { "success", json11::Json::array {
            get_next_id(),
            json11::Json::object {
                { "request_range", json11::Json::object {
                    { "key", base64_encode(
                        parent->cli->st_cli.etcd_prefix+"/index/image/"+image_name
                    ) },
                } },
            },
        } } });
        state = 2;
 resume_2:
        if (parent->waiting > 0)
            return;
        extract_next_id(result["responses"][0]);
        old_id = 0;
        old_pool_id = 0;
        cfg_mod_rev = idx_mod_rev = 0;
        if (result["responses"][1]["response_range"]["kvs"].array_items().size() == 0)
        {
            for (auto & ic: parent->cli->st_cli.inode_config)
            {
                if (ic.second.name == image_name)
                {
                    old_id = INODE_NO_POOL(ic.first);
                    old_pool_id = INODE_POOL(ic.first);
                    size = ic.second.size;
                    new_parent_id = ic.second.parent_id;
                    cfg_mod_rev = ic.second.mod_revision;
                    break;
                }
            }
        }
        else
        {
            // FIXME: Parse kvs in etcd_state_client automatically
            {
                auto kv = parent->cli->st_cli.parse_etcd_kv(result["responses"][1]["response_range"]["kvs"][0]);
                old_id = INODE_NO_POOL(kv.value["id"].uint64_value());
                old_pool_id = (pool_id_t)kv.value["pool_id"].uint64_value();
                idx_mod_rev = kv.mod_revision;
                if (!old_id || !old_pool_id || old_pool_id >= POOL_ID_MAX)
                {
                    fprintf(stderr, "Invalid pool or inode ID in etcd key %s\n", kv.key.c_str());
                    exit(1);
                }
            }
            etcd_txn(json11::Json::object {
                { "success", json11::Json::array {
                    json11::Json::object {
                        { "request_range", json11::Json::object {
                            { "key", base64_encode(
                                parent->cli->st_cli.etcd_prefix+"/config/inode/"+
                                std::to_string(old_pool_id)+"/"+std::to_string(old_id)
                            ) },
                        } },
                    },
                } },
            });
            state = 3;
 resume_3:
            if (parent->waiting > 0)
                return;
            {
                auto kv = parent->cli->st_cli.parse_etcd_kv(result["responses"][0]["response_range"]["kvs"][0]);
                size = kv.value["size"].uint64_value();
                new_parent_id = kv.value["parent_id"].uint64_value();
                uint64_t parent_pool_id = kv.value["parent_pool_id"].uint64_value();
                if (new_parent_id)
                {
                    new_parent_id = INODE_WITH_POOL(parent_pool_id ? parent_pool_id : old_pool_id, new_parent_id);
                }
                cfg_mod_rev = kv.mod_revision;
            }
        }
    }
    void attempt_create()
    {
        inode_config_t new_cfg = {
            .num = INODE_WITH_POOL(new_pool_id, new_id),
            .name = image_name,
            .size = size,
            .parent_id = (new_snap != "" ? INODE_WITH_POOL(old_pool_id, old_id) : new_parent_id),
            .readonly = false,
        };
        json11::Json::array checks = json11::Json::array {
            json11::Json::object {
                { "target", "VERSION" },
                { "version", 0 },
                { "key", base64_encode(
                    parent->cli->st_cli.etcd_prefix+"/config/inode/"+
                    std::to_string(new_pool_id)+"/"+std::to_string(new_id)
                ) },
            },
            json11::Json::object {
                { "target", "VERSION" },
                { "version", 0 },
                { "key", base64_encode(
                    parent->cli->st_cli.etcd_prefix+"/index/image/"+image_name+
                    (new_snap != "" ? "@"+new_snap : "")
                ) },
            },
            json11::Json::object {
                { "target", "MOD" },
                { "mod_revision", max_id_mod_rev },
                { "key", base64_encode(parent->cli->st_cli.etcd_prefix+"/index/maxid/"+std::to_string(new_pool_id)) },
            },
        };
        json11::Json::array success = json11::Json::array {
            json11::Json::object {
                { "request_put", json11::Json::object {
                    { "key", base64_encode(
                        parent->cli->st_cli.etcd_prefix+"/config/inode/"+
                        std::to_string(new_pool_id)+"/"+std::to_string(new_id)
                    ) },
                    { "value", base64_encode(
                        json11::Json(parent->cli->st_cli.serialize_inode_cfg(&new_cfg)).dump()
                    ) },
                } },
            },
            json11::Json::object {
                { "request_put", json11::Json::object {
                    { "key", base64_encode(parent->cli->st_cli.etcd_prefix+"/index/image/"+image_name) },
                    { "value", base64_encode(json11::Json(json11::Json::object{
                        { "id", new_id },
                        { "pool_id", (uint64_t)new_pool_id },
                    }).dump()) },
                } },
            },
            json11::Json::object {
                { "request_put", json11::Json::object {
                    { "key", base64_encode(
                        parent->cli->st_cli.etcd_prefix+"/index/maxid/"+
                        std::to_string(new_pool_id)
                    ) },
                    { "value", base64_encode(std::to_string(new_id)) }
                } },
            },
        };
        json11::Json::array failure = json11::Json::array {
            json11::Json::object {
                { "request_range", json11::Json::object {
                    { "key", base64_encode(
                        parent->cli->st_cli.etcd_prefix+"/index/image/"+
                        image_name+(new_snap != "" ? "@"+new_snap : "")
                    ) },
                } },
            },
        };
        if (new_snap != "")
        {
            inode_config_t snap_cfg = {
                .num = INODE_WITH_POOL(old_pool_id, old_id),
                .name = image_name+"@"+new_snap,
                .size = size,
                .parent_id = new_parent_id,
                .readonly = true,
            };
            checks.push_back(json11::Json::object {
                { "target", "MOD" },
                { "mod_revision", cfg_mod_rev },
                { "key", base64_encode(
                    parent->cli->st_cli.etcd_prefix+"/config/inode/"+
                    std::to_string(old_pool_id)+"/"+std::to_string(old_id)
                ) },
            });
            checks.push_back(json11::Json::object {
                { "target", "MOD" },
                { "mod_revision", idx_mod_rev },
                { "key", base64_encode(parent->cli->st_cli.etcd_prefix+"/index/image/"+image_name) }
            });
            success.push_back(json11::Json::object {
                { "request_put", json11::Json::object {
                    { "key", base64_encode(
                        parent->cli->st_cli.etcd_prefix+"/config/inode/"+
                        std::to_string(old_pool_id)+"/"+std::to_string(old_id)
                    ) },
                    { "value", base64_encode(
                        json11::Json(parent->cli->st_cli.serialize_inode_cfg(&snap_cfg)).dump()
                    ) },
                } },
            });
            success.push_back(json11::Json::object {
                { "request_put", json11::Json::object {
                    { "key", base64_encode(parent->cli->st_cli.etcd_prefix+"/index/image/"+image_name+"@"+new_snap) },
                    { "value", base64_encode(json11::Json(json11::Json::object{
                        { "id", old_id },
                        { "pool_id", (uint64_t)old_pool_id },
                    }).dump()) },
                } },
            });
        };
        etcd_txn(json11::Json::object {
            { "compare", checks },
            { "success", success },
            { "failure", failure },
        });
    }
    void etcd_txn(json11::Json txn)
    {
        parent->waiting++;
        parent->cli->st_cli.etcd_txn(txn, ETCD_SLOW_TIMEOUT, [this](std::string err, json11::Json res)
        {
            parent->waiting--;
            if (err != "")
            {
                fprintf(stderr, "Error reading from etcd: %s\n", err.c_str());
                exit(1);
            }
            this->result = res;
            parent->ringloop->wakeup();
        });
    }
 };
 uint64_t parse_size(std::string size_str)
 {
    if (!size_str.length())
    {
        return 0;
    }
    uint64_t mul = 1;
    char type_char = tolower(size_str[size_str.length()-1]);
    if (type_char == 'k' || type_char == 'm' || type_char == 'g' || type_char == 't')
    {
        if (type_char == 'k')
            mul = 1l<<10;
        else if (type_char == 'm')
            mul = 1l<<20;
        else if (type_char == 'g')
            mul = 1l<<30;
        else /*if (type_char == 't')*/
            mul = 1l<<40;
        size_str = size_str.substr(0, size_str.length()-1);
    }
    uint64_t size = json11::Json(size_str).uint64_value() * mul;
    if (size == 0 && size_str != "0" && (size_str != "" || mul != 1))
    {
        fprintf(stderr, "Invalid syntax for size: %s\n", size_str.c_str());
        exit(1);
    }
    return size;
 }
 std::function<bool(void)> cli_tool_t::start_create(json11::Json cfg)
 {
    json11::Json::array cmd = cfg["command"].array_items();
    auto image_creator = new image_creator_t();
    image_creator->parent = this;
    image_creator->image_name = cmd.size() > 1 ? cmd[1].string_value() : "";
    image_creator->new_pool_id = cfg["pool"].uint64_value();
    image_creator->new_pool_name = cfg["pool"].string_value();
    if (cfg["snapshot"].string_value() != "")
    {
        image_creator->new_snap = cfg["snapshot"].string_value();
    }
    else if (cmd[0] == "snap-create")
    {
        int p = image_creator->image_name.find('@');
        if (p == std::string::npos || p == image_creator->image_name.length()-1)
        {
            fprintf(stderr, "Please specify new snapshot name after @\n");
            exit(1);
        }
        image_creator->new_snap = image_creator->image_name.substr(p + 1);
        image_creator->image_name = image_creator->image_name.substr(0, p);
    }
    image_creator->new_parent = cfg["parent"].string_value();
    if (cfg["size"].string_value() != "")
    {
        image_creator->size = parse_size(cfg["size"].string_value());
        if (image_creator->size % 4096)
        {
            fprintf(stderr, "Size should be a multiple of 4096\n");
            exit(1);
        }
        if (image_creator->new_snap != "")
        {
            fprintf(stderr, "--size can't be specified for snapshots\n");
            exit(1);
        }
    }
    if (image_creator->image_name == "")
    {
        fprintf(stderr, "Image name is missing\n");
        exit(1);
    }
    if (image_creator->image_name.find('@') != std::string::npos)
    {
        fprintf(stderr, "Image name can't contain @ character\n");
        exit(1);
    }
    return [image_creator]()
    {
        image_creator->loop();
        if (image_creator->is_done())
        {
            delete image_creator;
            return true;
        }
        return false;
    };
 }
--- a/src/cli_df.cpp
+++ b/src/cli_df.cpp
@ -1,229 +0,0 @@
 // Copyright (c) Vitaliy Filippov, 2019+
 // License: VNPL-1.1 (see README.md for details)
 #include "cli.h"
 #include "cluster_client.h"
 #include "base64.h"
 // List pools with space statistics
 struct pool_lister_t
 {
    cli_tool_t *parent;
    int state = 0;
    json11::Json space_info;
    std::map<pool_id_t, json11::Json::object> pool_stats;
    bool is_done()
    {
        return state == 100;
    }
    void get_stats()
    {
        if (state == 1)
            goto resume_1;
        // Space statistics - pool/stats/<pool>
        parent->waiting++;
        parent->cli->st_cli.etcd_txn(json11::Json::object {
            { "success", json11::Json::array {
                json11::Json::object {
                    { "request_range", json11::Json::object {
                        { "key", base64_encode(
                            parent->cli->st_cli.etcd_prefix+"/pool/stats/"
                        ) },
                        { "range_end", base64_encode(
                            parent->cli->st_cli.etcd_prefix+"/pool/stats0"
                        ) },
                    } },
                },
                json11::Json::object {
                    { "request_range", json11::Json::object {
                        { "key", base64_encode(
                            parent->cli->st_cli.etcd_prefix+"/osd/stats/"
                        ) },
                        { "range_end", base64_encode(
                            parent->cli->st_cli.etcd_prefix+"/osd/stats0"
                        ) },
                    } },
                },
            } },
        }, ETCD_SLOW_TIMEOUT, [this](std::string err, json11::Json res)
        {
            parent->waiting--;
            if (err != "")
            {
                fprintf(stderr, "Error reading from etcd: %s\n", err.c_str());
                exit(1);
            }
            space_info = res;
            parent->ringloop->wakeup();
        });
        state = 1;
 resume_1:
        if (parent->waiting > 0)
            return;
        std::map<pool_id_t, uint64_t> osd_free;
        for (auto & kv_item: space_info["responses"][0]["response_range"]["kvs"].array_items())
        {
            auto kv = parent->cli->st_cli.parse_etcd_kv(kv_item);
            // pool ID
            pool_id_t pool_id;
            char null_byte = 0;
            sscanf(kv.key.substr(parent->cli->st_cli.etcd_prefix.length()).c_str(), "/pool/stats/%u%c", &pool_id, &null_byte);
            if (!pool_id || pool_id >= POOL_ID_MAX || null_byte != 0)
            {
                fprintf(stderr, "Invalid key in etcd: %s\n", kv.key.c_str());
                continue;
            }
            // pool/stats/<N>
            pool_stats[pool_id] = kv.value.object_items();
        }
        for (auto & kv_item: space_info["responses"][1]["response_range"]["kvs"].array_items())
        {
            auto kv = parent->cli->st_cli.parse_etcd_kv(kv_item);
            // osd ID
            osd_num_t osd_num;
            char null_byte = 0;
            sscanf(kv.key.substr(parent->cli->st_cli.etcd_prefix.length()).c_str(), "/osd/stats/%lu%c", &osd_num, &null_byte);
            if (!osd_num || osd_num >= POOL_ID_MAX || null_byte != 0)
            {
                fprintf(stderr, "Invalid key in etcd: %s\n", kv.key.c_str());
                continue;
            }
            // osd/stats/<N>::free
            osd_free[osd_num] = kv.value["free"].uint64_value();
        }
        // Calculate max_avail for each pool
        for (auto & pp: parent->cli->st_cli.pool_config)
        {
            auto & pool_cfg = pp.second;
            uint64_t pool_avail = UINT64_MAX;
            std::map<osd_num_t, uint64_t> pg_per_osd;
            for (auto & pgp: pool_cfg.pg_config)
            {
                for (auto pg_osd: pgp.second.target_set)
                {
                    if (pg_osd != 0)
                    {
                        pg_per_osd[pg_osd]++;
                    }
                }
            }
            for (auto pg_per_pair: pg_per_osd)
            {
                uint64_t pg_free = osd_free[pg_per_pair.first] * pool_cfg.pg_count / pg_per_pair.second;
                if (pool_avail > pg_free)
                {
                    pool_avail = pg_free;
                }
            }
            if (pool_cfg.scheme != POOL_SCHEME_REPLICATED)
            {
                pool_avail = pool_avail * (pool_cfg.pg_size - pool_cfg.parity_chunks) / pool_stats[pool_cfg.id]["pg_real_size"].uint64_value();
            }
            pool_stats[pool_cfg.id] = json11::Json::object {
                { "name", pool_cfg.name },
                { "pg_count", pool_cfg.pg_count },
                { "scheme", pool_cfg.scheme == POOL_SCHEME_REPLICATED ? "replicated" : "jerasure" },
                { "scheme_name", pool_cfg.scheme == POOL_SCHEME_REPLICATED
                    ? std::to_string(pool_cfg.pg_size)+"/"+std::to_string(pool_cfg.pg_minsize)
                    : "EC "+std::to_string(pool_cfg.pg_size-pool_cfg.parity_chunks)+"+"+std::to_string(pool_cfg.parity_chunks) },
                { "used_raw", (uint64_t)(pool_stats[pool_cfg.id]["used_raw_tb"].number_value() * (1l<<40)) },
                { "total_raw", (uint64_t)(pool_stats[pool_cfg.id]["total_raw_tb"].number_value() * (1l<<40)) },
                { "max_available", pool_avail },
                { "raw_to_usable", pool_stats[pool_cfg.id]["raw_to_usable"].number_value() },
                { "space_efficiency", pool_stats[pool_cfg.id]["space_efficiency"].number_value() },
                { "pg_real_size", pool_stats[pool_cfg.id]["pg_real_size"].uint64_value() },
                { "failure_domain", pool_cfg.failure_domain },
            };
        }
    }
    json11::Json::array to_list()
    {
        json11::Json::array list;
        for (auto & kv: pool_stats)
        {
            list.push_back(kv.second);
        }
        return list;
    }
    void loop()
    {
        get_stats();
        if (parent->waiting > 0)
            return;
        if (parent->json_output)
        {
            // JSON output
            printf("%s\n", json11::Json(to_list()).dump().c_str());
            state = 100;
            return;
        }
        // Table output: name, scheme_name, pg_count, total, used, max_avail, used%, efficiency
        json11::Json::array cols;
        cols.push_back(json11::Json::object{
            { "key", "name" },
            { "title", "NAME" },
        });
        cols.push_back(json11::Json::object{
            { "key", "scheme_name" },
            { "title", "SCHEME" },
        });
        cols.push_back(json11::Json::object{
            { "key", "pg_count" },
            { "title", "PGS" },
        });
        cols.push_back(json11::Json::object{
            { "key", "total_fmt" },
            { "title", "TOTAL" },
        });
        cols.push_back(json11::Json::object{
            { "key", "used_fmt" },
            { "title", "USED" },
        });
        cols.push_back(json11::Json::object{
            { "key", "max_avail_fmt" },
            { "title", "AVAILABLE" },
        });
        cols.push_back(json11::Json::object{
            { "key", "used_pct" },
            { "title", "USED%" },
        });
        cols.push_back(json11::Json::object{
            { "key", "eff_fmt" },
            { "title", "EFFICIENCY" },
        });
        json11::Json::array list;
        for (auto & kv: pool_stats)
        {
            kv.second["total_fmt"] = format_size(kv.second["total_raw"].uint64_value() / kv.second["raw_to_usable"].number_value());
            kv.second["used_fmt"] = format_size(kv.second["used_raw"].uint64_value() / kv.second["raw_to_usable"].number_value());
            kv.second["max_avail_fmt"] = format_size(kv.second["max_available"].uint64_value());
            kv.second["used_pct"] = format_q(100 - 100*kv.second["max_available"].uint64_value() *
                kv.second["raw_to_usable"].number_value() / kv.second["total_raw"].uint64_value())+"%";
            kv.second["eff_fmt"] = format_q(kv.second["space_efficiency"].number_value()*100)+"%";
        }
        printf("%s", print_table(to_list(), cols, parent->color).c_str());
        state = 100;
    }
 };
 std::function<bool(void)> cli_tool_t::start_df(json11::Json cfg)
 {
    json11::Json::array cmd = cfg["command"].array_items();
    auto lister = new pool_lister_t();
    lister->parent = this;
    return [lister]()
    {
        lister->loop();
        if (lister->is_done())
        {
            delete lister;
            return true;
        }
        return false;
    };
 }
--- a/src/cli_flatten.cpp
+++ b/src/cli_flatten.cpp
@ -1,124 +0,0 @@
 // Copyright (c) Vitaliy Filippov, 2019+
 // License: VNPL-1.1 (see README.md for details)
 #include "cli.h"
 #include "cluster_client.h"
 // Flatten a layer: merge all parents into a layer and break the connection completely
 struct snap_flattener_t
 {
    cli_tool_t *parent;
    // target to flatten
    std::string target_name;
    // writers are stopped, we can safely change writable layers
    bool writers_stopped = false;
    // use CAS writes (0 = never, 1 = auto, 2 = always)
    int use_cas = 1;
    // interval between fsyncs
    int fsync_interval = 128;
    std::string top_parent_name;
    inode_t target_id = 0;
    int state = 0;
    std::function<bool(void)> merger_cb;
    void get_merge_parents()
    {
        // Get all parents of target
        inode_config_t *target_cfg = parent->get_inode_cfg(target_name);
        target_id = target_cfg->num;
        std::vector<inode_t> chain_list;
        inode_config_t *cur = target_cfg;
        chain_list.push_back(cur->num);
        while (cur->parent_id != 0 && cur->parent_id != target_cfg->num)
        {
            auto it = parent->cli->st_cli.inode_config.find(cur->parent_id);
            if (it == parent->cli->st_cli.inode_config.end())
            {
                fprintf(stderr, "Parent inode of layer %s (id %ld) not found\n", cur->name.c_str(), cur->parent_id);
                exit(1);
            }
            cur = &it->second;
            chain_list.push_back(cur->num);
        }
        if (cur->parent_id != 0)
        {
            fprintf(stderr, "Layer %s has a loop in parents\n", target_name.c_str());
            exit(1);
        }
        top_parent_name = cur->name;
    }
    bool is_done()
    {
        return state == 5;
    }
    void loop()
    {
        if (state == 1)
            goto resume_1;
        else if (state == 2)
            goto resume_2;
        else if (state == 3)
            goto resume_3;
        // Get parent layers
        get_merge_parents();
        // Start merger
        merger_cb = parent->start_merge(json11::Json::object {
            { "command", json11::Json::array{ "merge-data", top_parent_name, target_name } },
            { "target", target_name },
            { "delete-source", false },
            { "cas", use_cas },
            { "fsync-interval", fsync_interval },
        });
        // Wait for it
 resume_1:
        while (!merger_cb())
        {
            state = 1;
            return;
        }
        merger_cb = NULL;
        // Change parent
        parent->change_parent(target_id, 0);
        // Wait for it to complete
        state = 2;
 resume_2:
        if (parent->waiting > 0)
            return;
        state = 3;
 resume_3:
        // Done
        return;
    }
 };
 std::function<bool(void)> cli_tool_t::start_flatten(json11::Json cfg)
 {
    json11::Json::array cmd = cfg["command"].array_items();
    auto flattener = new snap_flattener_t();
    flattener->parent = this;
    flattener->target_name = cmd.size() > 1 ? cmd[1].string_value() : "";
    if (flattener->target_name == "")
    {
        fprintf(stderr, "Layer to flatten argument is missing\n");
        exit(1);
    }
    flattener->fsync_interval = cfg["fsync-interval"].uint64_value();
    if (!flattener->fsync_interval)
        flattener->fsync_interval = 128;
    if (!cfg["cas"].is_null())
        flattener->use_cas = cfg["cas"].uint64_value() ? 2 : 0;
    return [flattener]()
    {
        flattener->loop();
        if (flattener->is_done())
        {
            delete flattener;
            return true;
        }
        return false;
    };
 }
--- a/src/cli_ls.cpp
+++ b/src/cli_ls.cpp
@ -1,582 +0,0 @@
 // Copyright (c) Vitaliy Filippov, 2019+
 // License: VNPL-1.1 (see README.md for details)
 #include <algorithm>
 #include "cli.h"
 #include "cluster_client.h"
 #include "base64.h"
 // List existing images
 //
 // Again, you can just look into etcd, but this console tool incapsulates it
 struct image_lister_t
 {
    cli_tool_t *parent;
    pool_id_t list_pool_id = 0;
    std::string list_pool_name;
    std::string sort_field;
    std::set<std::string> only_names;
    bool reverse = false;
    int max_count = 0;
    bool show_stats = false, show_delete = false;
    int state = 0;
    std::map<inode_t, json11::Json::object> stats;
    json11::Json space_info;
    bool is_done()
    {
        return state == 100;
    }
    void get_list()
    {
        if (list_pool_name != "")
        {
            for (auto & ic: parent->cli->st_cli.pool_config)
            {
                if (ic.second.name == list_pool_name)
                {
                    list_pool_id = ic.first;
                    break;
                }
            }
            if (!list_pool_id)
            {
                fprintf(stderr, "Pool %s does not exist\n", list_pool_name.c_str());
                exit(1);
            }
        }
        for (auto & ic: parent->cli->st_cli.inode_config)
        {
            if (list_pool_id && INODE_POOL(ic.second.num) != list_pool_id)
            {
                continue;
            }
            auto & pool_cfg = parent->cli->st_cli.pool_config.at(INODE_POOL(ic.second.num));
            auto item = json11::Json::object {
                { "name", ic.second.name },
                { "size", ic.second.size },
                { "used_size", 0 },
                { "readonly", ic.second.readonly },
                { "pool_id", (uint64_t)INODE_POOL(ic.second.num) },
                { "pool_name", pool_cfg.name },
                { "inode_num", INODE_NO_POOL(ic.second.num) },
                { "inode_id", ic.second.num },
            };
            if (ic.second.parent_id)
            {
                auto p_it = parent->cli->st_cli.inode_config.find(ic.second.parent_id);
                item["parent_name"] = p_it != parent->cli->st_cli.inode_config.end()
                    ? p_it->second.name : "";
                item["parent_pool_id"] = (uint64_t)INODE_POOL(ic.second.parent_id);
                item["parent_inode_num"] = INODE_NO_POOL(ic.second.parent_id);
            }
            stats[ic.second.num] = item;
        }
    }
    void get_stats()
    {
        if (state == 1)
            goto resume_1;
        // Space statistics
        // inode/stats/<pool>/<inode>::raw_used divided by pool/stats/<pool>::pg_real_size
        // multiplied by 1 or number of data drives
        parent->waiting++;
        parent->cli->st_cli.etcd_txn(json11::Json::object {
            { "success", json11::Json::array {
                json11::Json::object {
                    { "request_range", json11::Json::object {
                        { "key", base64_encode(
                            parent->cli->st_cli.etcd_prefix+"/pool/stats"+
                            (list_pool_id ? "/"+std::to_string(list_pool_id) : "")+"/"
                        ) },
                        { "range_end", base64_encode(
                            parent->cli->st_cli.etcd_prefix+"/pool/stats"+
                            (list_pool_id ? "/"+std::to_string(list_pool_id) : "")+"0"
                        ) },
                    } },
                },
                json11::Json::object {
                    { "request_range", json11::Json::object {
                        { "key", base64_encode(
                            parent->cli->st_cli.etcd_prefix+"/inode/stats"+
                            (list_pool_id ? "/"+std::to_string(list_pool_id) : "")+"/"
                        ) },
                        { "range_end", base64_encode(
                            parent->cli->st_cli.etcd_prefix+"/inode/stats"+
                            (list_pool_id ? "/"+std::to_string(list_pool_id) : "")+"0"
                        ) },
                    } },
                },
            } },
        }, ETCD_SLOW_TIMEOUT, [this](std::string err, json11::Json res)
        {
            parent->waiting--;
            if (err != "")
            {
                fprintf(stderr, "Error reading from etcd: %s\n", err.c_str());
                exit(1);
            }
            space_info = res;
            parent->ringloop->wakeup();
        });
        state = 1;
 resume_1:
        if (parent->waiting > 0)
            return;
        std::map<pool_id_t, uint64_t> pool_pg_real_size;
        for (auto & kv_item: space_info["responses"][0]["response_range"]["kvs"].array_items())
        {
            auto kv = parent->cli->st_cli.parse_etcd_kv(kv_item);
            // pool ID
            pool_id_t pool_id;
            char null_byte = 0;
            sscanf(kv.key.substr(parent->cli->st_cli.etcd_prefix.length()).c_str(), "/pool/stats/%u%c", &pool_id, &null_byte);
            if (!pool_id || pool_id >= POOL_ID_MAX || null_byte != 0)
            {
                fprintf(stderr, "Invalid key in etcd: %s\n", kv.key.c_str());
                continue;
            }
            // pg_real_size
            pool_pg_real_size[pool_id] = kv.value["pg_real_size"].uint64_value();
        }
        for (auto & kv_item: space_info["responses"][1]["response_range"]["kvs"].array_items())
        {
            auto kv = parent->cli->st_cli.parse_etcd_kv(kv_item);
            // pool ID & inode number
            pool_id_t pool_id;
            inode_t only_inode_num;
            char null_byte = 0;
            sscanf(kv.key.substr(parent->cli->st_cli.etcd_prefix.length()).c_str(),
                "/inode/stats/%u/%lu%c", &pool_id, &only_inode_num, &null_byte);
            if (!pool_id || pool_id >= POOL_ID_MAX || INODE_POOL(only_inode_num) != 0 || null_byte != 0)
            {
                fprintf(stderr, "Invalid key in etcd: %s\n", kv.key.c_str());
                continue;
            }
            inode_t inode_num = INODE_WITH_POOL(pool_id, only_inode_num);
            uint64_t used_size = kv.value["raw_used"].uint64_value();
            // save stats
            auto pool_it = parent->cli->st_cli.pool_config.find(pool_id);
            if (pool_it != parent->cli->st_cli.pool_config.end())
            {
                auto & pool_cfg = pool_it->second;
                used_size = used_size / pool_pg_real_size[pool_id]
                    * (pool_cfg.scheme == POOL_SCHEME_REPLICATED ? 1 : pool_cfg.pg_size-pool_cfg.parity_chunks);
            }
            auto stat_it = stats.find(inode_num);
            if (stat_it == stats.end())
            {
                stats[inode_num] = json11::Json::object {
                    { "name", "Pool:"+std::to_string(pool_id)+",ID:"+std::to_string(only_inode_num) },
                    { "size", 0 },
                    { "readonly", false },
                    { "pool_id", (uint64_t)INODE_POOL(inode_num) },
                    { "pool_name", pool_it == parent->cli->st_cli.pool_config.end()
                        ? (pool_it->second.name == "" ? "<Unnamed>" : pool_it->second.name) : "?" },
                    { "inode_num", INODE_NO_POOL(inode_num) },
                    { "inode_id", inode_num },
                };
                stat_it = stats.find(inode_num);
            }
            stat_it->second["used_size"] = used_size;
            stat_it->second["read_iops"] = kv.value["read"]["iops"];
            stat_it->second["read_bps"] = kv.value["read"]["bps"];
            stat_it->second["read_lat"] = kv.value["read"]["lat"];
            stat_it->second["read_queue"] = kv.value["read"]["iops"].number_value() * kv.value["read"]["lat"].number_value() / 1000000;
            stat_it->second["write_iops"] = kv.value["write"]["iops"];
            stat_it->second["write_bps"] = kv.value["write"]["bps"];
            stat_it->second["write_lat"] = kv.value["write"]["lat"];
            stat_it->second["write_queue"] = kv.value["write"]["iops"].number_value() * kv.value["write"]["lat"].number_value() / 1000000;
            stat_it->second["delete_iops"] = kv.value["delete"]["iops"];
            stat_it->second["delete_bps"] = kv.value["delete"]["bps"];
            stat_it->second["delete_lat"] = kv.value["delete"]["lat"];
            stat_it->second["delete_queue"] = kv.value["delete"]["iops"].number_value() * kv.value["delete"]["lat"].number_value() / 1000000;
        }
    }
    json11::Json::array to_list()
    {
        json11::Json::array list;
        for (auto & kv: stats)
        {
            if (!only_names.size())
            {
                list.push_back(kv.second);
            }
            else
            {
                for (auto glob: only_names)
                {
                    if (stupid_glob(kv.second["name"].string_value(), glob))
                    {
                        list.push_back(kv.second);
                        break;
                    }
                }
            }
        }
        if (sort_field == "name" || sort_field == "pool_name")
        {
            std::sort(list.begin(), list.end(), [this](json11::Json a, json11::Json b)
            {
                auto av = a[sort_field].as_string();
                auto bv = b[sort_field].as_string();
                return reverse ? av > bv : av < bv;
            });
        }
        else
        {
            std::sort(list.begin(), list.end(), [this](json11::Json a, json11::Json b)
            {
                auto av = a[sort_field].number_value();
                auto bv = b[sort_field].number_value();
                return reverse ? av > bv : av < bv;
            });
        }
        if (max_count > 0 && list.size() > max_count)
        {
            list.resize(max_count);
        }
        return list;
    }
    void loop()
    {
        if (state == 1)
            goto resume_1;
        get_list();
        if (show_stats)
        {
 resume_1:
            get_stats();
            if (parent->waiting > 0)
                return;
        }
        if (parent->json_output)
        {
            // JSON output
            printf("%s\n", json11::Json(to_list()).dump().c_str());
            state = 100;
            return;
        }
        // Table output: name, size_fmt, [used_size_fmt], ro, parent_name
        json11::Json::array cols;
        cols.push_back(json11::Json::object{
            { "key", "name" },
            { "title", "NAME" },
        });
        if (!list_pool_id)
        {
            cols.push_back(json11::Json::object{
                { "key", "pool_name" },
                { "title", "POOL" },
            });
        }
        cols.push_back(json11::Json::object{
            { "key", "size_fmt" },
            { "title", "SIZE" },
        });
        if (show_stats)
        {
            cols.push_back(json11::Json::object{
                { "key", "used_size_fmt" },
                { "title", "USED" },
            });
            cols.push_back(json11::Json::object{
                { "key", "read_bw" },
                { "title", "READ" },
            });
            cols.push_back(json11::Json::object{
                { "key", "read_iops" },
                { "title", "IOPS" },
            });
            cols.push_back(json11::Json::object{
                { "key", "read_q" },
                { "title", "QUEUE" },
            });
            cols.push_back(json11::Json::object{
                { "key", "read_lat_f" },
                { "title", "LAT" },
            });
            cols.push_back(json11::Json::object{
                { "key", "write_bw" },
                { "title", "WRITE" },
            });
            cols.push_back(json11::Json::object{
                { "key", "write_iops" },
                { "title", "IOPS" },
            });
            cols.push_back(json11::Json::object{
                { "key", "write_q" },
                { "title", "QUEUE" },
            });
            cols.push_back(json11::Json::object{
                { "key", "write_lat_f" },
                { "title", "LAT" },
            });
            if (show_delete)
            {
                cols.push_back(json11::Json::object{
                    { "key", "delete_bw" },
                    { "title", "DEL" },
                });
                cols.push_back(json11::Json::object{
                    { "key", "delete_iops" },
                    { "title", "IOPS" },
                });
                cols.push_back(json11::Json::object{
                    { "key", "delete_q" },
                    { "title", "QUEUE" },
                });
                cols.push_back(json11::Json::object{
                    { "key", "delete_lat_f" },
                    { "title", "LAT" },
                });
            }
        }
        cols.push_back(json11::Json::object{
            { "key", "ro" },
            { "title", "FLAGS" },
            { "right", true },
        });
        cols.push_back(json11::Json::object{
            { "key", "parent_name" },
            { "title", "PARENT" },
        });
        json11::Json::array list;
        for (auto & kv: stats)
        {
            if (show_stats)
            {
                kv.second["used_size_fmt"] = format_size(kv.second["used_size"].uint64_value());
                kv.second["read_bw"] = format_size(kv.second["read_bps"].uint64_value())+"/s";
                kv.second["write_bw"] = format_size(kv.second["write_bps"].uint64_value())+"/s";
                kv.second["delete_bw"] = format_size(kv.second["delete_bps"].uint64_value())+"/s";
                kv.second["read_iops"] = format_q(kv.second["read_iops"].number_value());
                kv.second["write_iops"] = format_q(kv.second["write_iops"].number_value());
                kv.second["delete_iops"] = format_q(kv.second["delete_iops"].number_value());
                kv.second["read_lat_f"] = format_lat(kv.second["read_lat"].uint64_value());
                kv.second["write_lat_f"] = format_lat(kv.second["write_lat"].uint64_value());
                kv.second["delete_lat_f"] = format_lat(kv.second["delete_lat"].uint64_value());
                kv.second["read_q"] = format_q(kv.second["read_queue"].number_value());
                kv.second["write_q"] = format_q(kv.second["write_queue"].number_value());
                kv.second["delete_q"] = format_q(kv.second["delete_queue"].number_value());
            }
            kv.second["size_fmt"] = format_size(kv.second["size"].uint64_value());
            kv.second["ro"] = kv.second["readonly"].bool_value() ? "RO" : "-";
        }
        printf("%s", print_table(to_list(), cols, parent->color).c_str());
        state = 100;
    }
 };
 std::string print_table(json11::Json items, json11::Json header, bool use_esc)
 {
    std::vector<int> sizes;
    for (int i = 0; i < header.array_items().size(); i++)
    {
        sizes.push_back(header[i]["title"].string_value().length());
    }
    for (auto & item: items.array_items())
    {
        for (int i = 0; i < header.array_items().size(); i++)
        {
            int l = item[header[i]["key"].string_value()].as_string().length();
            sizes[i] = sizes[i] < l ? l : sizes[i];
        }
    }
    std::string str = use_esc ? "\033[1m" : "";
    for (int i = 0; i < header.array_items().size(); i++)
    {
        if (i > 0)
        {
            // Separator
            str += "  ";
        }
        int pad = sizes[i]-header[i]["title"].string_value().length();
        if (header[i]["right"].bool_value())
        {
            // Align right
            for (int j = 0; j < pad; j++)
                str += ' ';
            str += header[i]["title"].string_value();
        }
        else
        {
            // Align left
            str += header[i]["title"].string_value();
            for (int j = 0; j < pad; j++)
                str += ' ';
        }
    }
    if (use_esc)
        str += "\033[0m";
    str += "\n";
    for (auto & item: items.array_items())
    {
        for (int i = 0; i < header.array_items().size(); i++)
        {
            if (i > 0)
            {
                // Separator
                str += "  ";
            }
            int pad = sizes[i] - item[header[i]["key"].string_value()].as_string().length();
            if (header[i]["right"].bool_value())
            {
                // Align right
                for (int j = 0; j < pad; j++)
                    str += ' ';
                str += item[header[i]["key"].string_value()].as_string();
            }
            else
            {
                // Align left
                str += item[header[i]["key"].string_value()].as_string();
                for (int j = 0; j < pad; j++)
                    str += ' ';
            }
        }
        str += "\n";
    }
    return str;
 }
 static uint64_t size_thresh[] = { 1024l*1024*1024*1024, 1024l*1024*1024, 1024l*1024, 1024, 0 };
 static const char *size_unit = "TGMKB";
 std::string format_size(uint64_t size)
 {
    char buf[256];
    for (int i = 0; i < sizeof(size_thresh)/sizeof(size_thresh[0]); i++)
    {
        if (size >= size_thresh[i] || i >= sizeof(size_thresh)/sizeof(size_thresh[0])-1)
        {
            double value = size_thresh[i] ? (double)size/size_thresh[i] : size;
            int l = snprintf(buf, sizeof(buf), "%.1f", value);
            assert(l < sizeof(buf)-2);
            if (buf[l-1] == '0')
                l -= 2;
            buf[l] = ' ';
            buf[l+1] = size_unit[i];
            buf[l+2] = 0;
            break;
        }
    }
    return std::string(buf);
 }
 std::string format_lat(uint64_t lat)
 {
    char buf[256];
    int l = 0;
    if (lat < 100)
        l = snprintf(buf, sizeof(buf), "%lu us", lat);
    else if (lat < 500000)
        l = snprintf(buf, sizeof(buf), "%.2f ms", (double)lat/1000);
    else
        l = snprintf(buf, sizeof(buf), "%.2f s", (double)lat/1000000);
    assert(l < sizeof(buf));
    return std::string(buf);
 }
 std::string format_q(double depth)
 {
    char buf[256];
    int l = snprintf(buf, sizeof(buf), "%.2f", depth);
    assert(l < sizeof(buf));
    if (buf[l-1] == '0')
        l--;
    if (buf[l-1] == '0')
        l -= 2;
    buf[l] = 0;
    return std::string(buf);
 }
 struct glob_stack_t
 {
    int glob_pos;
    int str_pos;
 };
 // Yes I know I could do it by translating the pattern to std::regex O:-)
 bool stupid_glob(const std::string str, const std::string glob)
 {
    std::vector<glob_stack_t> wildcards;
    int pos = 0, gp = 0;
    bool m;
 back:
    while (true)
    {
        if (gp >= glob.length())
        {
            if (pos >= str.length())
                return true;
            m = false;
        }
        else if (glob[gp] == '*')
        {
            wildcards.push_back((glob_stack_t){ .glob_pos = ++gp, .str_pos = pos });
            continue;
        }
        else if (glob[gp] == '?')
            m = pos < str.size();
        else
        {
            if (glob[gp] == '\\' && gp < glob.length()-1)
                gp++;
            m = pos < str.size() && str[pos] == glob[gp];
        }
        if (!m)
        {
            while (wildcards.size() > 0)
            {
                // Backtrack
                pos = (++wildcards[wildcards.size()-1].str_pos);
                if (pos > str.size())
                    wildcards.pop_back();
                else
                {
                    gp = wildcards[wildcards.size()-1].glob_pos;
                    goto back;
                }
            }
            return false;
        }
        pos++;
        gp++;
    }
    return true;
 }
 std::function<bool(void)> cli_tool_t::start_ls(json11::Json cfg)
 {
    json11::Json::array cmd = cfg["command"].array_items();
    auto lister = new image_lister_t();
    lister->parent = this;
    lister->list_pool_id = cfg["pool"].uint64_value();
    lister->list_pool_name = lister->list_pool_id ? "" : cfg["pool"].as_string();
    lister->show_stats = cfg["long"].bool_value();
    lister->show_delete = cfg["del"].bool_value();
    lister->sort_field = cfg["sort"].string_value();
    lister->reverse = cfg["reverse"].bool_value();
    lister->max_count = cfg["count"].uint64_value();
    for (int i = 1; i < cmd.size(); i++)
    {
        lister->only_names.insert(cmd[i].string_value());
    }
    return [lister]()
    {
        lister->loop();
        if (lister->is_done())
        {
            delete lister;
            return true;
        }
        return false;
    };
 }
--- a/src/cli_merge.cpp
+++ b/src/cli_merge.cpp
@ -1,583 +0,0 @@
 // Copyright (c) Vitaliy Filippov, 2019+
 // License: VNPL-1.1 (see README.md for details)
 #include "cli.h"
 #include "cluster_client.h"
 #include "cpp-btree/safe_btree_set.h"
 struct snap_rw_op_t
 {
    uint64_t offset = 0;
    void *buf = NULL;
    cluster_op_t op;
    int todo = 0;
    uint32_t start = 0, end = 0;
 };
 // Layer merge is the base for multiple operations:
 // 1) Delete snapshot "up" = merge child layer into the parent layer, remove the child
 //    and rename the parent to the child
 // 2) Delete snapshot "down" = merge parent layer into the child layer and remove the parent
 // 3) Flatten image = merge parent layers into the child layer and break the connection
 struct snap_merger_t
 {
    cli_tool_t *parent;
    // -- CONFIGURATION --
    // merge from..to into target (target may be one of from..to)
    std::string from_name, to_name, target_name;
    // inode=>rank (bigger rank means child layers)
    std::map<inode_t,int> sources;
    // delete merged source inode data during merge
    bool delete_source = false;
    // use CAS writes (0 = never, 1 = auto, 2 = always)
    int use_cas = 1;
    // don't necessarily delete source data, but perform checks as if we were to do it
    bool check_delete_source = false;
    // interval between fsyncs
    int fsync_interval = 128;
    // -- STATE --
    inode_t target;
    int target_rank;
    bool inside_continue = false;
    int state = 0;
    int lists_todo = 0;
    uint64_t target_block_size = 0;
    btree::safe_btree_set<uint64_t> merge_offsets;
    btree::safe_btree_set<uint64_t>::iterator oit;
    std::map<inode_t, std::vector<uint64_t>> layer_lists;
    std::map<inode_t, uint64_t> layer_block_size;
    std::map<inode_t, uint64_t> layer_list_pos;
    int in_flight = 0;
    uint64_t last_fsync_offset = 0;
    uint64_t last_written_offset = 0;
    int deleted_unsynced = 0;
    uint64_t processed = 0, to_process = 0;
    void start_merge()
    {
        check_delete_source = delete_source || check_delete_source;
        inode_config_t *from_cfg = parent->get_inode_cfg(from_name);
        inode_config_t *to_cfg = parent->get_inode_cfg(to_name);
        inode_config_t *target_cfg = target_name == "" ? from_cfg : parent->get_inode_cfg(target_name);
        if (to_cfg->num == from_cfg->num)
        {
            fprintf(stderr, "Only one layer specified, nothing to merge\n");
            exit(1);
        }
        // Check that to_cfg is actually a child of from_cfg and target_cfg is somewhere between them
        std::vector<inode_t> chain_list;
        inode_config_t *cur = to_cfg;
        chain_list.push_back(cur->num);
        layer_block_size[cur->num] = get_block_size(cur->num);
        while (cur->parent_id != from_cfg->num &&
            cur->parent_id != to_cfg->num &&
            cur->parent_id != 0)
        {
            auto it = parent->cli->st_cli.inode_config.find(cur->parent_id);
            if (it == parent->cli->st_cli.inode_config.end())
            {
                fprintf(stderr, "Parent inode of layer %s (id %ld) not found\n", cur->name.c_str(), cur->parent_id);
                exit(1);
            }
            cur = &it->second;
            chain_list.push_back(cur->num);
            layer_block_size[cur->num] = get_block_size(cur->num);
        }
        if (cur->parent_id != from_cfg->num)
        {
            fprintf(stderr, "Layer %s is not a child of %s\n", to_name.c_str(), from_name.c_str());
            exit(1);
        }
        chain_list.push_back(from_cfg->num);
        layer_block_size[from_cfg->num] = get_block_size(from_cfg->num);
        int i = chain_list.size()-1;
        for (inode_t item: chain_list)
        {
            sources[item] = i--;
        }
        if (sources.find(target_cfg->num) == sources.end())
        {
            fprintf(stderr, "Layer %s is not between %s and %s\n", target_name.c_str(), to_name.c_str(), from_name.c_str());
            exit(1);
        }
        target = target_cfg->num;
        target_rank = sources.at(target);
        int to_rank = sources.at(to_cfg->num);
        bool to_has_children = false;
        // Check that there are no other inodes dependent on altered layers
        //
        // 1) everything between <target> and <to> except <to> is not allowed
        //    to have children other than <to> if <to> is a child of <target>:
        //
        //    <target> - <layer 3> - <to>
        //            \- <layer 4> <--------X--------- NOT ALLOWED
        //
        // 2) everything between <from> and <target>, except <target>, is not allowed
        //    to have children other than <target> if sources are to be deleted after merging:
        //
        //    <from> - <layer 1> - <target> - <to>
        //          \- <layer 2> <---------X-------- NOT ALLOWED
        for (auto & ic: parent->cli->st_cli.inode_config)
        {
            auto it = sources.find(ic.second.num);
            if (it == sources.end() && ic.second.parent_id != 0)
            {
                it = sources.find(ic.second.parent_id);
                if (it != sources.end())
                {
                    int parent_rank = it->second;
                    if (parent_rank < to_rank && (parent_rank >= target_rank || check_delete_source))
                    {
                        fprintf(
                            stderr, "Layers at or above %s, but below %s are not allowed"
                                " to have other children, but %s is a child of %s\n",
                            (check_delete_source ? from_name.c_str() : target_name.c_str()),
                            to_name.c_str(), ic.second.name.c_str(),
                            parent->cli->st_cli.inode_config.at(ic.second.parent_id).name.c_str()
                        );
                        exit(1);
                    }
                    if (parent_rank >= to_rank)
                    {
                        to_has_children = true;
                    }
                }
            }
        }
        if ((target_rank < to_rank || to_has_children) && use_cas == 1)
        {
            // <to> has children itself, no need for CAS
            use_cas = 0;
        }
        sources.erase(target);
        printf(
            "Merging %ld layer(s) into target %s%s (inode %lu in pool %u)\n",
            sources.size(), target_cfg->name.c_str(),
            use_cas ? " online (with CAS)" : "", INODE_NO_POOL(target), INODE_POOL(target)
        );
        target_block_size = get_block_size(target);
    }
    uint64_t get_block_size(inode_t inode)
    {
        auto & pool_cfg = parent->cli->st_cli.pool_config.at(INODE_POOL(inode));
        uint64_t pg_data_size = (pool_cfg.scheme == POOL_SCHEME_REPLICATED ? 1 : pool_cfg.pg_size-pool_cfg.parity_chunks);
        return parent->cli->get_bs_block_size() * pg_data_size;
    }
    void continue_merge_reent()
    {
        if (!inside_continue)
        {
            inside_continue = true;
            continue_merge();
            inside_continue = false;
        }
    }
    bool is_done()
    {
        return state == 6;
    }
    void continue_merge()
    {
        if (state == 1)
            goto resume_1;
        else if (state == 2)
            goto resume_2;
        else if (state == 3)
            goto resume_3;
        else if (state == 4)
            goto resume_4;
        else if (state == 5)
            goto resume_5;
        else if (state == 6)
            goto resume_6;
        // Get parents and so on
        start_merge();
        // First list lower layers
        list_layers(true);
        state = 1;
    resume_1:
        while (lists_todo > 0)
        {
            // Wait for lists
            return;
        }
        if (merge_offsets.size() > 0)
        {
            state = 2;
            oit = merge_offsets.begin();
            processed = 0;
            to_process = merge_offsets.size();
    resume_2:
            // Then remove blocks already filled in target by issuing zero-length reads and checking bitmaps
            while (in_flight < parent->iodepth*parent->parallel_osds && oit != merge_offsets.end())
            {
                in_flight++;
                check_if_full(*oit);
                oit++;
                processed++;
                if (parent->progress && !(processed % 128))
                {
                    printf("\rFiltering target blocks: %lu/%lu", processed, to_process);
                }
            }
            if (in_flight > 0 || oit != merge_offsets.end())
            {
                // Wait until reads finish
                return;
            }
            if (parent->progress)
            {
                printf("\r%lu full blocks of target filtered out\n", to_process-merge_offsets.size());
            }
        }
        state = 3;
    resume_3:
        // Then list upper layers
        list_layers(false);
        state = 4;
    resume_4:
        while (lists_todo > 0)
        {
            // Wait for lists
            return;
        }
        state = 5;
        processed = 0;
        to_process = merge_offsets.size();
        oit = merge_offsets.begin();
    resume_5:
        // Now read, overwrite and optionally delete offsets one by one
        while (in_flight < parent->iodepth*parent->parallel_osds && oit != merge_offsets.end())
        {
            in_flight++;
            read_and_write(*oit);
            oit++;
            processed++;
            if (parent->progress && !(processed % 128))
            {
                printf("\rOverwriting blocks: %lu/%lu", processed, to_process);
            }
        }
        if (in_flight > 0 || oit != merge_offsets.end())
        {
            // Wait until overwrites finish
            return;
        }
        if (parent->progress)
        {
            printf("\rOverwriting blocks: %lu/%lu\n", to_process, to_process);
        }
        // Done
        printf("Done, layers from %s to %s merged into %s\n", from_name.c_str(), to_name.c_str(), target_name.c_str());
        state = 6;
    resume_6:
        return;
    }
    void list_layers(bool lower)
    {
        for (auto & sp: sources)
        {
            inode_t src = sp.first;
            if (lower ? (sp.second < target_rank) : (sp.second > target_rank))
            {
                lists_todo++;
                inode_list_t* lst = parent->cli->list_inode_start(src, [this, src](
                    inode_list_t *lst, std::set<object_id>&& objects, pg_num_t pg_num, osd_num_t primary_osd, int status)
                {
                    uint64_t layer_block = layer_block_size.at(src);
                    for (object_id obj: objects)
                    {
                        merge_offsets.insert(obj.stripe - obj.stripe % target_block_size);
                        for (int i = target_block_size; i < layer_block; i += target_block_size)
                        {
                            merge_offsets.insert(obj.stripe - obj.stripe % target_block_size + i);
                        }
                    }
                    if (delete_source)
                    {
                        // Also store individual lists
                        auto & layer_list = layer_lists[src];
                        int pos = layer_list.size();
                        layer_list.resize(pos + objects.size());
                        for (object_id obj: objects)
                        {
                            layer_list[pos++] = obj.stripe;
                        }
                    }
                    if (status & INODE_LIST_DONE)
                    {
                        auto & name = parent->cli->st_cli.inode_config.at(src).name;
                        printf("Got listing of layer %s (inode %lu in pool %u)\n", name.c_str(), INODE_NO_POOL(src), INODE_POOL(src));
                        if (delete_source)
                        {
                            // Sort the inode listing
                            std::sort(layer_lists[src].begin(), layer_lists[src].end());
                        }
                        lists_todo--;
                        continue_merge_reent();
                    }
                    else
                    {
                        parent->cli->list_inode_next(lst, 1);
                    }
                });
                parent->cli->list_inode_next(lst, parent->parallel_osds);
            }
        }
    }
    // Check if <offset> is fully written in <target> and remove it from merge_offsets if so
    void check_if_full(uint64_t offset)
    {
        cluster_op_t *op = new cluster_op_t;
        op->opcode = OSD_OP_READ_BITMAP;
        op->inode = target;
        op->offset = offset;
        op->len = 0;
        op->callback = [this](cluster_op_t *op)
        {
            if (op->retval < 0)
            {
                fprintf(stderr, "error reading target bitmap at offset %lx: %s\n", op->offset, strerror(-op->retval));
            }
            else
            {
                uint64_t bitmap_bytes = target_block_size/parent->cli->get_bs_bitmap_granularity()/8;
                int i;
                for (i = 0; i < bitmap_bytes; i++)
                {
                    if (((uint8_t*)op->bitmap_buf)[i] != 0xff)
                    {
                        break;
                    }
                }
                if (i == bitmap_bytes)
                {
                    // full
                    merge_offsets.erase(op->offset);
                }
            }
            delete op;
            in_flight--;
            continue_merge_reent();
        };
        parent->cli->execute(op);
    }
    // Read <offset> from <to>, write it to <target> and optionally delete it
    // from all layers except <target> after fsync'ing
    void read_and_write(uint64_t offset)
    {
        snap_rw_op_t *rwo = new snap_rw_op_t;
        // Initialize counter to 1 to later allow write_subop() to return immediately
        // (even though it shouldn't really do that)
        rwo->todo = 1;
        rwo->buf = malloc(target_block_size);
        rwo->offset = offset;
        rwo_read(rwo);
    }
    void rwo_read(snap_rw_op_t *rwo)
    {
        cluster_op_t *op = &rwo->op;
        op->opcode = OSD_OP_READ;
        op->inode = target;
        op->offset = rwo->offset;
        op->len = target_block_size;
        op->iov.push_back(rwo->buf, target_block_size);
        op->callback = [this, rwo](cluster_op_t *op)
        {
            if (op->retval != op->len)
            {
                fprintf(stderr, "error reading target at offset %lx: %s\n", op->offset, strerror(-op->retval));
                exit(1);
            }
            next_write(rwo);
        };
        parent->cli->execute(op);
    }
    void next_write(snap_rw_op_t *rwo)
    {
        // Write each non-empty range using an individual operation
        // FIXME: Allow to use single write with "holes" (OSDs don't allow it yet)
        uint32_t gran = parent->cli->get_bs_bitmap_granularity();
        uint64_t bitmap_size = target_block_size / gran;
        while (rwo->end < bitmap_size)
        {
            auto bit = ((*(uint8_t*)(rwo->op.bitmap_buf + (rwo->end >> 3))) & (1 << (rwo->end & 0x7)));
            if (!bit)
            {
                if (rwo->end > rwo->start)
                {
                    // write start->end
                    rwo->todo++;
                    write_subop(rwo, rwo->start*gran, rwo->end*gran, use_cas ? 1+rwo->op.version : 0);
                    rwo->start = rwo->end;
                    if (use_cas)
                    {
                        // Submit one by one if using CAS writes
                        return;
                    }
                }
                rwo->start = rwo->end = rwo->end+1;
            }
            else
            {
                rwo->end++;
            }
        }
        if (rwo->end > rwo->start)
        {
            // write start->end
            rwo->todo++;
            write_subop(rwo, rwo->start*gran, rwo->end*gran, use_cas ? 1+rwo->op.version : 0);
            rwo->start = rwo->end;
            if (use_cas)
            {
                return;
            }
        }
        rwo->todo--;
        // Just in case, if everything is done
        autofree_op(rwo);
    }
    void write_subop(snap_rw_op_t *rwo, uint32_t start, uint32_t end, uint64_t version)
    {
        cluster_op_t *subop = new cluster_op_t;
        subop->opcode = OSD_OP_WRITE;
        subop->inode = target;
        subop->offset = rwo->offset+start;
        subop->len = end-start;
        subop->version = version;
        subop->flags = OSD_OP_IGNORE_READONLY;
        subop->iov.push_back(rwo->buf+start, end-start);
        subop->callback = [this, rwo](cluster_op_t *subop)
        {
            rwo->todo--;
            if (subop->retval != subop->len)
            {
                if (use_cas && subop->retval == -EINTR)
                {
                    // CAS failure - reread and repeat optimistically
                    rwo->start = subop->offset - rwo->offset;
                    rwo_read(rwo);
                    delete subop;
                    return;
                }
                fprintf(stderr, "error writing target at offset %lx: %s\n", subop->offset, strerror(-subop->retval));
                exit(1);
            }
            // Increment CAS version
            rwo->op.version++;
            if (use_cas)
                next_write(rwo);
            else
                autofree_op(rwo);
            delete subop;
        };
        parent->cli->execute(subop);
    }
    void delete_offset(inode_t inode_num, uint64_t offset)
    {
        cluster_op_t *subop = new cluster_op_t;
        subop->opcode = OSD_OP_DELETE;
        subop->inode = inode_num;
        subop->offset = offset;
        subop->len = 0;
        subop->flags = OSD_OP_IGNORE_READONLY;
        subop->callback = [this](cluster_op_t *subop)
        {
            if (subop->retval != 0)
            {
                fprintf(stderr, "error deleting from layer 0x%lx at offset %lx: %s", subop->inode, subop->offset, strerror(-subop->retval));
            }
            delete subop;
        };
        parent->cli->execute(subop);
    }
    void autofree_op(snap_rw_op_t *rwo)
    {
        if (!rwo->todo)
        {
            if (last_written_offset < rwo->op.offset+target_block_size)
            {
                last_written_offset = rwo->op.offset+target_block_size;
            }
            if (delete_source)
            {
                deleted_unsynced++;
                if (deleted_unsynced >= fsync_interval)
                {
                    uint64_t from = last_fsync_offset, to = last_written_offset;
                    cluster_op_t *subop = new cluster_op_t;
                    subop->opcode = OSD_OP_SYNC;
                    subop->callback = [this, from, to](cluster_op_t *subop)
                    {
                        delete subop;
                        // We can now delete source data between <from> and <to>
                        // But to do this we have to keep all object lists in memory :-(
                        for (auto & lp: layer_list_pos)
                        {
                            auto & layer_list = layer_lists.at(lp.first);
                            uint64_t layer_block = layer_block_size.at(lp.first);
                            int cur_pos = lp.second;
                            while (cur_pos < layer_list.size() && layer_list[cur_pos]+layer_block < to)
                            {
                                delete_offset(lp.first, layer_list[cur_pos]);
                                cur_pos++;
                            }
                            lp.second = cur_pos;
                        }
                    };
                    parent->cli->execute(subop);
                }
            }
            free(rwo->buf);
            delete rwo;
            in_flight--;
            continue_merge_reent();
        }
    }
 };
 std::function<bool(void)> cli_tool_t::start_merge(json11::Json cfg)
 {
    json11::Json::array cmd = cfg["command"].array_items();
    auto merger = new snap_merger_t();
    merger->parent = this;
    merger->from_name = cmd.size() > 1 ? cmd[1].string_value() : "";
    merger->to_name = cmd.size() > 2 ? cmd[2].string_value() : "";
    merger->target_name = cfg["target"].string_value();
    if (merger->from_name == "" || merger->to_name == "")
    {
        fprintf(stderr, "Beginning or end of the merge sequence is missing\n");
        exit(1);
    }
    merger->delete_source = cfg["delete-source"].string_value() != "";
    merger->fsync_interval = cfg["fsync-interval"].uint64_value();
    if (!merger->fsync_interval)
        merger->fsync_interval = 128;
    if (!cfg["cas"].is_null())
        merger->use_cas = cfg["cas"].uint64_value() ? 2 : 0;
    return [merger]()
    {
        merger->continue_merge_reent();
        if (merger->is_done())
        {
            delete merger;
            return true;
        }
        return false;
    };
 }
--- a/src/cli_modify.cpp
+++ b/src/cli_modify.cpp
@ -1,236 +0,0 @@
 // Copyright (c) Vitaliy Filippov, 2019+
 // License: VNPL-1.1 (see README.md for details)
 #include "cli.h"
 #include "cluster_client.h"
 #include "base64.h"
 // Rename, resize image (and purge extra data on shrink) or change its readonly status
 struct image_changer_t
 {
    cli_tool_t *parent;
    std::string image_name;
    std::string new_name;
    uint64_t new_size = 0;
    bool set_readonly = false, set_readwrite = false, force = false;
    // interval between fsyncs
    int fsync_interval = 128;
    uint64_t inode_num = 0;
    inode_config_t cfg;
    json11::Json::array checks, success;
    bool has_children = false;
    int state = 0;
    std::function<bool(void)> cb;
    bool is_done()
    {
        return state == 100;
    }
    void loop()
    {
        if (state == 1)
            goto resume_1;
        else if (state == 2)
            goto resume_2;
        for (auto & ic: parent->cli->st_cli.inode_config)
        {
            if (ic.second.name == image_name)
            {
                inode_num = ic.first;
                cfg = ic.second;
                break;
            }
            if (new_name != "" && ic.second.name == new_name)
            {
                fprintf(stderr, "Image %s already exists\n", new_name.c_str());
                exit(1);
            }
        }
        if (!inode_num)
        {
            fprintf(stderr, "Image %s does not exist\n", image_name.c_str());
            exit(1);
        }
        for (auto & ic: parent->cli->st_cli.inode_config)
        {
            if (ic.second.parent_id == inode_num)
            {
                has_children = true;
                break;
            }
        }
        if ((!set_readwrite || !cfg.readonly) &&
            (!set_readonly || cfg.readonly) &&
            (!new_size || cfg.size == new_size) &&
            (new_name == "" || new_name == image_name))
        {
            printf("No change\n");
            state = 100;
            return;
        }
        if (new_size != 0)
        {
            if (cfg.size >= new_size)
            {
                // Check confirmation when trimming an image with children
                if (has_children && !force)
                {
                    fprintf(stderr, "Image %s has children. Refusing to shrink it without --force\n", image_name.c_str());
                    exit(1);
                }
                // Shrink the image first
                cb = parent->start_rm(json11::Json::object {
                    { "inode", INODE_NO_POOL(inode_num) },
                    { "pool", (uint64_t)INODE_POOL(inode_num) },
                    { "fsync-interval", fsync_interval },
                    { "min-offset", new_size },
                });
 resume_1:
                while (!cb())
                {
                    state = 1;
                    return;
                }
                cb = NULL;
            }
            cfg.size = new_size;
        }
        if (set_readonly)
        {
            cfg.readonly = true;
        }
        if (set_readwrite)
        {
            cfg.readonly = false;
            // Check confirmation when making an image with children read-write
            if (has_children && !force)
            {
                fprintf(stderr, "Image %s has children. Refusing to make it read-write without --force\n", image_name.c_str());
                exit(1);
            }
        }
        if (new_name != "")
        {
            cfg.name = new_name;
        }
        {
            std::string cur_cfg_key = base64_encode(parent->cli->st_cli.etcd_prefix+
                "/config/inode/"+std::to_string(INODE_POOL(inode_num))+
                "/"+std::to_string(INODE_NO_POOL(inode_num)));
            checks.push_back(json11::Json::object {
                { "target", "MOD" },
                { "key", cur_cfg_key },
                { "result", "LESS" },
                { "mod_revision", cfg.mod_revision+1 },
            });
            success.push_back(json11::Json::object {
                { "request_put", json11::Json::object {
                    { "key", cur_cfg_key },
                    { "value", base64_encode(json11::Json(
                        parent->cli->st_cli.serialize_inode_cfg(&cfg)
                    ).dump()) },
                } }
            });
        }
        if (new_name != "")
        {
            std::string old_idx_key = base64_encode(
                parent->cli->st_cli.etcd_prefix+"/index/image/"+image_name
            );
            std::string new_idx_key = base64_encode(
                parent->cli->st_cli.etcd_prefix+"/index/image/"+new_name
            );
            checks.push_back(json11::Json::object {
                { "target", "MOD" },
                { "key", old_idx_key },
                { "result", "LESS" },
                { "mod_revision", cfg.mod_revision+1 },
            });
            checks.push_back(json11::Json::object {
                { "target", "VERSION" },
                { "version", 0 },
                { "key", new_idx_key },
            });
            success.push_back(json11::Json::object {
                { "request_delete_range", json11::Json::object {
                    { "key", old_idx_key },
                } }
            });
            success.push_back(json11::Json::object {
                { "request_put", json11::Json::object {
                    { "key", new_idx_key },
                    { "value", base64_encode(json11::Json(json11::Json::object{
                        { "id", INODE_NO_POOL(inode_num) },
                        { "pool_id", (uint64_t)INODE_POOL(inode_num) },
                    }).dump()) },
                } }
            });
        }
        parent->waiting++;
        parent->cli->st_cli.etcd_txn(json11::Json::object {
            { "compare", checks },
            { "success", success },
        }, ETCD_SLOW_TIMEOUT, [this](std::string err, json11::Json res)
        {
            if (err != "")
            {
                fprintf(stderr, "Error changing %s: %s\n", image_name.c_str(), err.c_str());
                exit(1);
            }
            if (!res["succeeded"].bool_value())
            {
                fprintf(stderr, "Image %s was modified by someone else, please repeat your request\n", image_name.c_str());
                exit(1);
            }
            parent->waiting--;
            parent->ringloop->wakeup();
        });
        state = 2;
 resume_2:
        if (parent->waiting > 0)
            return;
        printf("Image %s modified\n", image_name.c_str());
        state = 100;
    }
 };
 std::function<bool(void)> cli_tool_t::start_modify(json11::Json cfg)
 {
    json11::Json::array cmd = cfg["command"].array_items();
    auto changer = new image_changer_t();
    changer->parent = this;
    changer->image_name = cmd.size() > 1 ? cmd[1].string_value() : "";
    if (changer->image_name == "")
    {
        fprintf(stderr, "Image name is missing\n");
        exit(1);
    }
    changer->new_name = cfg["rename"].string_value();
    changer->new_size = parse_size(cfg["resize"].string_value());
    if (changer->new_size != 0 && (changer->new_size % 4096))
    {
        fprintf(stderr, "Image size should be a multiple of 4096\n");
        exit(1);
    }
    changer->force = cfg["force"].bool_value();
    changer->set_readonly = cfg["readonly"].bool_value();
    changer->set_readwrite = cfg["readwrite"].bool_value();
    changer->fsync_interval = cfg["fsync-interval"].uint64_value();
    if (!changer->fsync_interval)
        changer->fsync_interval = 128;
    // FIXME Check that the image doesn't have children when shrinking
    return [changer]()
    {
        changer->loop();
        if (changer->is_done())
        {
            delete changer;
            return true;
        }
        return false;
    };
 }
--- a/src/cli_rm.cpp
+++ b/src/cli_rm.cpp
@ -1,213 +0,0 @@
 // Copyright (c) Vitaliy Filippov, 2019+
 // License: VNPL-1.1 (see README.md for details)
 #include "cli.h"
 #include "cluster_client.h"
 #define RM_LISTING 1
 #define RM_REMOVING 2
 #define RM_END 3
 struct rm_pg_t
 {
    pg_num_t pg_num;
    osd_num_t rm_osd_num;
    std::set<object_id> objects;
    std::set<object_id>::iterator obj_pos;
    uint64_t obj_count = 0, obj_done = 0;
    int state = 0;
    int in_flight = 0;
 };
 struct rm_inode_t
 {
    uint64_t inode = 0;
    pool_id_t pool_id = 0;
    uint64_t min_offset = 0;
    cli_tool_t *parent = NULL;
    inode_list_t *lister = NULL;
    std::vector<rm_pg_t*> lists;
    uint64_t total_count = 0, total_done = 0, total_prev_pct = 0;
    uint64_t pgs_to_list = 0;
    bool lists_done = false;
    int state = 0;
    void start_delete()
    {
        lister = parent->cli->list_inode_start(inode, [this](inode_list_t *lst,
            std::set<object_id>&& objects, pg_num_t pg_num, osd_num_t primary_osd, int status)
        {
            rm_pg_t *rm = new rm_pg_t((rm_pg_t){
                .pg_num = pg_num,
                .rm_osd_num = primary_osd,
                .objects = objects,
                .obj_count = objects.size(),
                .obj_done = 0,
            });
            if (min_offset == 0)
            {
                total_count += objects.size();
            }
            else
            {
                for (object_id oid: objects)
                {
                    if (oid.stripe >= min_offset)
                    {
                        total_count++;
                    }
                }
            }
            rm->obj_pos = rm->objects.begin();
            lists.push_back(rm);
            if (parent->list_first)
            {
                parent->cli->list_inode_next(lister, 1);
            }
            if (status & INODE_LIST_DONE)
            {
                lists_done = true;
            }
            pgs_to_list--;
            continue_delete();
        });
        if (!lister)
        {
            fprintf(stderr, "Failed to list inode %lu from pool %u objects\n", INODE_NO_POOL(inode), INODE_POOL(inode));
            exit(1);
        }
        pgs_to_list = parent->cli->list_pg_count(lister);
        parent->cli->list_inode_next(lister, parent->parallel_osds);
    }
    void send_ops(rm_pg_t *cur_list)
    {
        if (parent->cli->msgr.osd_peer_fds.find(cur_list->rm_osd_num) ==
            parent->cli->msgr.osd_peer_fds.end())
        {
            // Initiate connection
            parent->cli->msgr.connect_peer(cur_list->rm_osd_num, parent->cli->st_cli.peer_states[cur_list->rm_osd_num]);
            return;
        }
        while (cur_list->in_flight < parent->iodepth && cur_list->obj_pos != cur_list->objects.end())
        {
            if (cur_list->obj_pos->stripe >= min_offset)
            {
                osd_op_t *op = new osd_op_t();
                op->op_type = OSD_OP_OUT;
                op->peer_fd = parent->cli->msgr.osd_peer_fds[cur_list->rm_osd_num];
                op->req = (osd_any_op_t){
                    .rw = {
                        .header = {
                            .magic = SECONDARY_OSD_OP_MAGIC,
                            .id = parent->cli->next_op_id(),
                            .opcode = OSD_OP_DELETE,
                        },
                        .inode = cur_list->obj_pos->inode,
                        .offset = cur_list->obj_pos->stripe,
                        .len = 0,
                    },
                };
                op->callback = [this, cur_list](osd_op_t *op)
                {
                    cur_list->in_flight--;
                    if (op->reply.hdr.retval < 0)
                    {
                        fprintf(stderr, "Failed to remove object %lx:%lx from PG %u (OSD %lu) (retval=%ld)\n",
                            op->req.rw.inode, op->req.rw.offset,
                            cur_list->pg_num, cur_list->rm_osd_num, op->reply.hdr.retval);
                    }
                    delete op;
                    cur_list->obj_done++;
                    total_done++;
                    continue_delete();
                };
                cur_list->in_flight++;
                parent->cli->msgr.outbox_push(op);
            }
            cur_list->obj_pos++;
        }
    }
    void continue_delete()
    {
        if (parent->list_first && !lists_done)
        {
            return;
        }
        for (int i = 0; i < lists.size(); i++)
        {
            if (!lists[i]->in_flight && lists[i]->obj_pos == lists[i]->objects.end())
            {
                delete lists[i];
                lists.erase(lists.begin()+i, lists.begin()+i+1);
                i--;
                if (!lists_done)
                {
                    parent->cli->list_inode_next(lister, 1);
                }
            }
            else
            {
                send_ops(lists[i]);
            }
        }
        if (parent->progress && total_count > 0 && total_done*1000/total_count != total_prev_pct)
        {
            printf("\rRemoved %lu/%lu objects, %lu more PGs to list...", total_done, total_count, pgs_to_list);
            total_prev_pct = total_done*1000/total_count;
        }
        if (lists_done && !lists.size())
        {
            printf("Done, inode %lu in pool %u data removed\n", INODE_NO_POOL(inode), pool_id);
            state = 2;
        }
    }
    bool loop()
    {
        if (state == 0)
        {
            start_delete();
            state = 1;
        }
        else if (state == 1)
        {
            continue_delete();
        }
        else if (state == 2)
        {
            return true;
        }
        return false;
    }
 };
 std::function<bool(void)> cli_tool_t::start_rm(json11::Json cfg)
 {
    auto remover = new rm_inode_t();
    remover->parent = this;
    remover->inode = cfg["inode"].uint64_value();
    remover->pool_id = cfg["pool"].uint64_value();
    if (remover->pool_id)
    {
        remover->inode = (remover->inode & ((1l << (64-POOL_ID_BITS)) - 1)) | (((uint64_t)remover->pool_id) << (64-POOL_ID_BITS));
    }
    remover->pool_id = INODE_POOL(remover->inode);
    if (!remover->pool_id)
    {
        fprintf(stderr, "pool is missing\n");
        exit(1);
    }
    remover->min_offset = cfg["min-offset"].uint64_value();
    return [remover]()
    {
        if (remover->loop())
        {
            delete remover;
            return true;
        }
        return false;
    };
 }
--- a/Show More
+++ b/Show More
`@ -1,4 +1,4 @@`
	`VERSION ?= v0.6.10`	`VERSION ?= v0.6.4`

	`all: build push`	`all: build push`
		`@ -1 +0,0 @@`
			`patches/PVE_VitastorPlugin.pm usr/share/perl5/PVE/Storage/Custom/VitastorPlugin.pm`
		`@ -0,0 +1,2 @@`
							`dep:fio=3.16-1`
							`dep:qemu=1:5.1+dfsg-4+vitastor1`
		`@ -1,2 +0,0 @@`
			`usr/bin/vitastor-osd`
			`usr/bin/vitastor-dump-journal`
		`@ -1 +1 @@`
			`Subproject commit 55363fc2653b8802637a3d2e73a06839a72c585d`				`Subproject commit 97f06cb20c1e136fd37d58fb40f57dd8f8a3a4a7`