Double-check for double-alloc bugs

- Implement a storage plugin for Proxmox. Now you can use Vitastor with Proxmox!
- Implement `vitastor-cli df` (pool space usage statistics) command
- Add glob pattern support for `vitastor-cli ls`
- Fix several bugs in other CLI commands (resize, create --parent, modify --readonly)
- Use 512 byte logical block size in QEMU driver by default (and thus don't require to set it in QEMU options)

CMakeLists.txt

@@ -2,6 +2,6 @@ cmake_minimum_required(VERSION 2.8)
 
 project(vitastor)
 
-set(VERSION "0.6.6")
+set(VERSION "0.6.10")
 
 add_subdirectory(src)

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)
+- Утилита для удаления образов/инодов (vitastor-cli rm-data)
 - Пакеты для Debian и CentOS
 - Статистика операций ввода/вывода и занятого места в разрезе инодов
 - Именование инодов через хранение их метаданных в etcd
@@ -50,13 +50,15 @@ Vitastor на данный момент находится в статусе п
 - 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, Proxmox и других облачных систем
+- Плагины для OpenNebula и других облачных систем
 - iSCSI-прокси
 - Более быстрое переключение при отказах
 - Фоновая проверка целостности без контрольных сумм (сверка реплик)
@@ -402,12 +404,21 @@ 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`.
-- Пропишите нужные вам значения вверху файлов `/usr/lib/vitastor/mon/make-units.sh` и `/usr/lib/vitastor/mon/make-osd.sh`.
-- Создайте юниты systemd для etcd и мониторов: `/usr/lib/vitastor/mon/make-units.sh`
-- 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:
+- На хостах мониторов:
+  - 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:
+  ```
+  {
+    "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.
@@ -492,10 +503,10 @@ qemu-system-x86_64 -enable-kvm -m 1024
 
 ### Удалить образ
 
-Используйте утилиту vitastor-cli rm. Например:
+Используйте утилиту vitastor-cli rm-data. Например:
 
 ```
-vitastor-cli rm --etcd_address 10.115.0.10:2379/v3 --pool 1 --inode 1 --parallel_osds 16 --iodepth 32
+vitastor-cli rm-data --etcd_address 10.115.0.10:2379/v3 --pool 1 --inode 1 --parallel_osds 16 --iodepth 32
 ```
 
 ### NBD
@@ -527,6 +538,75 @@ 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,

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)
+- Inode removal tool (vitastor-cli rm-data)
 - Packaging for Debian and CentOS
 - Per-inode I/O and space usage statistics
 - Inode metadata storage in etcd
@@ -44,6 +44,8 @@ breaking changes in the future. However, the following is implemented:
 - 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
 
@@ -355,13 +357,21 @@ 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`.
-- Check `/usr/lib/vitastor/mon/make-units.sh` and `/usr/lib/vitastor/mon/make-osd.sh` and
-  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`
+- On the monitor hosts:
+  - Edit variables at the top of `/usr/lib/vitastor/mon/make-units.sh` to desired values.
+  - 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 edit the units and change OSD configuration. Notable configuration variables:
+- You can change OSD configuration in units or in `vitastor.conf`. 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.
@@ -444,10 +454,10 @@ just like in qemu-img.
 
 ### Remove inode
 
-Use vitastor-rm. For example:
+Use vitastor-rm / vitastor-cli rm-data. For example:
 
 ```
-vitastor-rm --etcd_address 10.115.0.10:2379/v3 --pool 1 --inode 1 --parallel_osds 16 --iodepth 32
+vitastor-cli rm-data --etcd_address 10.115.0.10:2379/v3 --pool 1 --inode 1 --parallel_osds 16 --iodepth 32
 ```
 
 ### NBD
@@ -477,6 +487,73 @@ 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

csi/.dockerignore

@@ -1,3 +1,2 @@
 vitastor-csi
-go.sum
 Dockerfile

csi/Dockerfile

@@ -1,7 +1,7 @@
 # Compile stage
 FROM golang:buster AS build
 
-ADD go.mod /app/
+ADD go.sum 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'`

csi/Makefile

@@ -1,4 +1,4 @@
-VERSION ?= v0.6.6
+VERSION ?= v0.6.10
 
 all: build push
 

csi/deploy/004-csi-nodeplugin.yaml

@@ -49,7 +49,7 @@ spec:
             capabilities:
               add: ["SYS_ADMIN"]
             allowPrivilegeEscalation: true
-          image: vitalif/vitastor-csi:v0.6.6
+          image: vitalif/vitastor-csi:v0.6.10
           args:
             - "--node=$(NODE_ID)"
             - "--endpoint=$(CSI_ENDPOINT)"

csi/deploy/007-csi-provisioner.yaml

@@ -116,7 +116,7 @@ spec:
             privileged: true
             capabilities:
               add: ["SYS_ADMIN"]
-          image: vitalif/vitastor-csi:v0.6.6
+          image: vitalif/vitastor-csi:v0.6.10
           args:
             - "--node=$(NODE_ID)"
             - "--endpoint=$(CSI_ENDPOINT)"

csi/go.sum

@@ -0,0 +1,448 @@
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+cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc=
+cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0=
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+cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o=
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+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=
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csi/src/config.go

@@ -5,7 +5,7 @@ package vitastor
 
 const (
     vitastorCSIDriverName    = "csi.vitastor.io"
-    vitastorCSIDriverVersion = "0.6.6"
+    vitastorCSIDriverVersion = "0.6.10"
 )
 
 // Config struct fills the parameters of request or user input

csi/src/controllerserver.go

@@ -356,7 +356,7 @@ func (cs *ControllerServer) DeleteVolume(ctx context.Context, req *csi.DeleteVol
 
     // Delete inode data by invoking vitastor-cli
     args := []string{
-        "rm", "--etcd_address", strings.Join(etcdUrl, ","),
+        "rm-data", "--etcd_address", strings.Join(etcdUrl, ","),
         "--pool", fmt.Sprintf("%d", idx.PoolId),
         "--inode", fmt.Sprintf("%d", idx.Id),
     }
@@ -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 failed: %s, status %s\n", stderrStr, err)
+        klog.Errorf("vitastor-cli rm-data failed: %s, status %s\n", stderrStr, err)
         return nil, status.Error(codes.Internal, stderrStr+" (status "+err.Error()+")")
     }
 

debian/build-vitastor-bullseye.sh

@@ -1,7 +1,7 @@
 #!/bin/bash
 
-sed 's/$REL/bullseye/g' < vitastor.Dockerfile > ../Dockerfile
+cat < vitastor.Dockerfile > ../Dockerfile
 cd ..
 mkdir -p packages
-sudo podman build -v `pwd`/packages:/root/packages -f Dockerfile .
+sudo podman build --build-arg REL=bullseye -v `pwd`/packages:/root/packages -f Dockerfile .
 rm Dockerfile

debian/build-vitastor-buster.sh

@@ -1,7 +1,7 @@
 #!/bin/bash
 
-sed 's/$REL/buster/g' < vitastor.Dockerfile > ../Dockerfile
+cat < vitastor.Dockerfile > ../Dockerfile
 cd ..
 mkdir -p packages
-sudo podman build -v `pwd`/packages:/root/packages -f Dockerfile .
+sudo podman build --build-arg REL=buster -v `pwd`/packages:/root/packages -f Dockerfile .
 rm Dockerfile

debian/changelog

@@ -1,4 +1,4 @@
-vitastor (0.6.6-1) unstable; urgency=medium
+vitastor (0.6.10-1) unstable; urgency=medium
 
   * RDMA support
   * Bugfixes

debian/control

@@ -9,9 +9,47 @@ Rules-Requires-Root: no
 
 Package: vitastor
 Architecture: amd64
-Depends: ${shlibs:Depends}, ${misc:Depends}, fio (= ${dep:fio}), qemu (= ${dep:qemu}), nodejs (>= 10), node-sprintf-js, node-ws (>= 7), libjerasure2, lp-solve
+Depends: vitastor-osd, vitastor-mon, vitastor-client, vitastor-client-dev, vitastor-fio
 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.

debian/fio_version

@@ -0,0 +1 @@
+dep:fio=3.16-1

debian/install

@@ -1,3 +1,4 @@
 VNPL-1.1.txt usr/share/doc/vitastor
 GPL-2.0.txt usr/share/doc/vitastor
-mon usr/lib/vitastor
+README.md usr/share/doc/vitastor
+README-ru.md usr/share/doc/vitastor

debian/libvirt.Dockerfile

@@ -0,0 +1,40 @@
+# 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

debian/patched-qemu.Dockerfile

@@ -1,20 +1,18 @@
 # 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 [ "$REL" = "buster" ]; then \
-        echo 'deb http://deb.debian.org/debian buster-backports main' >> /etc/apt/sources.list; \
+RUN if [ "$REL" = "buster" -o "$REL" = "bullseye" ]; then \
+        echo "deb http://deb.debian.org/debian $REL-backports main" >> /etc/apt/sources.list; \
         echo >> /etc/apt/preferences; \
         echo 'Package: *' >> /etc/apt/preferences; \
-        echo 'Pin: release a=buster-backports' >> /etc/apt/preferences; \
+        echo "Pin: release a=$REL-backports" >> /etc/apt/preferences; \
         echo 'Pin-Priority: 500' >> /etc/apt/preferences; \
-        echo >> /etc/apt/preferences; \
-        echo 'Package: libglvnd* libgles* libglx* libgl1 libegl* libopengl* mesa*' >> /etc/apt/preferences; \
-        echo 'Pin: release a=buster-backports' >> /etc/apt/preferences; \
-        echo 'Pin-Priority: 50' >> /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; \
@@ -23,28 +21,41 @@ RUN if [ "$REL" = "buster" ]; 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
-RUN apt-get -y build-dep fio
 # To build a custom version
 #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 /root/vitastor/patches/
+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/
 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 [ -d /root/packages/qemu-$REL/qemu-5.0 ]; then \
-        cp /root/vitastor/patches/qemu-5.0-vitastor.patch /root/packages/qemu-$REL/qemu-5.0/debian/patches; \
-        echo qemu-5.0-vitastor.patch >> /root/packages/qemu-$REL/qemu-5.0/debian/patches/series; \
+    if ls -d /root/packages/qemu-$REL/qemu-5.0*; then \
+        D=$(ls -d /root/packages/qemu-$REL/qemu-5.0*); \
+        cp /root/vitastor/patches/qemu-5.0-vitastor.patch $D/debian/patches; \
+        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; \
         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; \
-    DEBFULLNAME="Vitaliy Filippov <vitalif@yourcmc.ru>" dch -D $REL -v $V 'Plug Vitastor block driver'; \
+    DEBEMAIL="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-*/

debian/pve-storage-vitastor.install

@@ -0,0 +1 @@
+patches/PVE_VitastorPlugin.pm usr/share/perl5/PVE/Storage/Custom/VitastorPlugin.pm

debian/raw.h

@@ -0,0 +1,19 @@
+/* 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 */

debian/rules

@@ -5,5 +5,6 @@ export DH_VERBOSE = 1
 	dh $@
 
 override_dh_installdeb:
-	cat debian/substvars >> debian/vitastor.substvars
+	cat debian/fio_version >> debian/vitastor-fio.substvars
+	[ -f debian/qemu_version ] && (cat debian/qemu_version >> debian/vitastor-qemu.substvars) || true
 	dh_installdeb

debian/substvars

@@ -1,2 +0,0 @@
-dep:fio=3.16-1
-dep:qemu=1:5.1+dfsg-4+vitastor1

debian/vitastor-client-dev.install

@@ -0,0 +1,2 @@
+usr/include
+usr/lib/*/pkgconfig

debian/vitastor-client.install

@@ -0,0 +1,6 @@
+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

debian/vitastor-fio.install

@@ -0,0 +1 @@
+usr/lib/*/libfio*.so*

debian/vitastor-mon.install

@@ -0,0 +1 @@
+mon usr/lib/vitastor

debian/vitastor-osd.install

@@ -0,0 +1,2 @@
+usr/bin/vitastor-osd
+usr/bin/vitastor-dump-journal

debian/vitastor.Dockerfile

@@ -1,15 +1,17 @@
 # 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 [ "$REL" = "buster" ]; then \
-        echo 'deb http://deb.debian.org/debian buster-backports main' >> /etc/apt/sources.list; \
+RUN if [ "$REL" = "buster" -o "$REL" = "bullseye" ]; then \
+        echo "deb http://deb.debian.org/debian $REL-backports main" >> /etc/apt/sources.list; \
         echo >> /etc/apt/preferences; \
         echo 'Package: *' >> /etc/apt/preferences; \
-        echo 'Pin: release a=buster-backports' >> /etc/apt/preferences; \
+        echo "Pin: release a=$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; \
@@ -17,10 +19,8 @@ RUN if [ "$REL" = "buster" ]; then \
     echo 'APT::Install-Suggests false;' >> /etc/apt/apt.conf
 
 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
+RUN apt-get -y install fio liburing1 liburing-dev libgoogle-perftools-dev devscripts
 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
 
@@ -30,37 +30,25 @@ 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-$REL; \
-    cp -r /root/vitastor vitastor-0.6.6; \
-    ln -s /root/packages/qemu-$REL/qemu-*/ vitastor-0.6.6/qemu; \
-    ln -s /root/fio-build/fio-*/ vitastor-0.6.6/fio; \
-    cd vitastor-0.6.6; \
+    cp -r /root/vitastor vitastor-0.6.10; \
+    cd vitastor-0.6.10; \
+    ln -s /root/fio-build/fio-*/ ./fio; \
     FIO=$(head -n1 fio/debian/changelog | perl -pe 's/^.*\((.*?)\).*$/$1/'); \
-    QEMU=$(head -n1 qemu/debian/changelog | perl -pe 's/^.*\((.*?)\).*$/$1/'); \
-    sh copy-qemu-includes.sh; \
+    ls /usr/include/linux/raw.h || cp ./debian/raw.h /usr/include/linux/raw.h; \
     sh copy-fio-includes.sh; \
-    rm qemu fio; \
+    rm fio; \
     mkdir -p a b debian/patches; \
-    mv qemu-copy b/qemu; \
     mv fio-copy b/fio; \
-    diff -NaurpbB a b > debian/patches/qemu-fio-headers.patch || true; \
-    echo qemu-fio-headers.patch >> debian/patches/series; \
+    diff -NaurpbB a b > debian/patches/fio-headers.patch || true; \
+    echo fio-headers.patch >> debian/patches/series; \
     rm -rf a b; \
-    rm -rf /root/packages/qemu-$REL/qemu*/; \
-    echo "dep:fio=$FIO" > debian/substvars; \
-    echo "dep:qemu=$QEMU" >> debian/substvars; \
+    echo "dep:fio=$FIO" > debian/fio_version; \
     cd /root/packages/vitastor-$REL; \
-    tar --sort=name --mtime='2020-01-01' --owner=0 --group=0 --exclude=debian -cJf vitastor_0.6.6.orig.tar.xz vitastor-0.6.6; \
-    cd vitastor-0.6.6; \
+    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; \
+    cd vitastor-0.6.10; \
     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; \

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 })
+async function optimize_initial({ osd_tree, pg_count, pg_size = 3, pg_minsize = 2, max_combinations = 10000, parity_space = 1, round_robin = false })
 {
     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);
+    const int_pgs = make_int_pgs(lp_result.vars, pg_count, round_robin);
     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)
+function make_int_pgs(weights, pg_count, round_robin)
 {
     const total_weight = Object.values(weights).reduce((a, c) => Number(a) + Number(c), 0);
     let int_pgs = [];
@@ -123,10 +123,15 @@ function make_int_pgs(weights, pg_count)
     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(pg_name.substr(3).split('_'));
+            int_pgs.push([ ...cur_pg ]);
+            if (round_robin)
+            {
+                cur_pg.push(cur_pg.shift());
+            }
         }
         weight_left -= weights[pg_name];
         pg_left -= n;
@@ -288,11 +293,6 @@ 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)

mon/make-osd.sh

@@ -4,36 +4,25 @@
 # Copyright (c) Vitaliy Filippov, 2019+
 # License: MIT
 
-# USAGE: ./make-osd.sh /dev/disk/by-partuuid/xxx [ /dev/disk/by-partuuid/yyy]...
-
-IP_SUBSTR="10.200.1."
-ETCD_HOSTS="etcd0=http://10.200.1.10:2380,etcd1=http://10.200.1.11:2380,etcd2=http://10.200.1.12:2380"
+# USAGE:
+# 1) Put etcd_address and osd_network into /etc/vitastor/vitastor.conf. Example:
+#    {
+#        "etcd_address":["http://10.200.1.10:2379/v3","http://10.200.1.11:2379/v3","http://10.200.1.12:2379/v3"],
+#        "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
 
-# 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/$OSD_NUM '{}'
+OSD_NUM=$(vitastor-cli alloc-osd)
 
 echo Creating OSD $OSD_NUM on $DEV
 
-OPT=`node $D/simple-offsets.js --device $DEV --format options | tr '\n' ' '`
-META=`echo $OPT | grep -Po '(?<=data_offset )\d+'`
+OPT=$(vitastor-cli simple-offsets --format options $DEV | tr '\n' ' ')
+META=$(vitastor-cli simple-offsets --format json $DEV | jq .data_offset)
 dd if=/dev/zero of=$DEV bs=1048576 count=$(((META+1048575)/1048576)) oflag=direct
 
 cat >/etc/systemd/system/vitastor-osd$OSD_NUM.service <<EOF
@@ -48,8 +37,6 @@ 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 \\

mon/mon-main.js

@@ -9,17 +9,18 @@ const options = {};
 
 for (let i = 2; i < process.argv.length; i++)
 {
-    if (process.argv[i].substr(0, 2) == '--')
+    if (process.argv[i] === '-h' || process.argv[i] === '--help')
+    {
+        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++;
     }
 }
 
-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(); });
+new Mon(options).start().catch(e => { console.error(e); process.exit(1); });

mon/mon.js

@@ -1,6 +1,7 @@
 // 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');
@@ -33,8 +34,10 @@ 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*',
@@ -81,11 +84,13 @@ const etcd_tree = {
             osd_ping_timeout: 5, // seconds. min: 1
             up_wait_retry_interval: 500, // ms. min: 50
             // osd
-            etcd_report_interval: 30, // min: 10
+            etcd_report_interval: 5,
             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,
@@ -229,7 +234,7 @@ const etcd_tree = {
             /* <pool_id>: {
                 <pg_id>: {
                     primary: osd_num_t,
-                    state: ("starting"|"peering"|"incomplete"|"active"|"repeering"|"stopping"|"offline"|
+                    state: ("starting"|"peering"|"peered"|"incomplete"|"active"|"repeering"|"stopping"|"offline"|
                         "degraded"|"has_incomplete"|"has_degraded"|"has_misplaced"|"has_unclean"|
                         "has_invalid"|"left_on_dead")[],
                 }
@@ -262,9 +267,9 @@ 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 },
-                    write: { count: uint64_t, usec: uint64_t, bytes: uint64_t },
-                    delete: { count: uint64_t, usec: uint64_t, bytes: uint64_t },
+                    read: { 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, bps: uint64_t, iops: uint64_t, lat: uint64_t },
+                    delete: { count: uint64_t, usec: uint64_t, bytes: uint64_t, bps: uint64_t, iops: uint64_t, lat: uint64_t },
                 },
             }, */
         },
@@ -281,14 +286,14 @@ const etcd_tree = {
     },
     stats: {
         /* op_stats: {
-            <string>: { count: uint64_t, usec: uint64_t, bytes: uint64_t },
+            <string>: { count: uint64_t, usec: uint64_t, bytes: uint64_t, bps: uint64_t, iops: uint64_t, lat: uint64_t },
         },
         subop_stats: {
-            <string>: { count: uint64_t, usec: uint64_t },
+            <string>: { count: uint64_t, usec: uint64_t, iops: uint64_t, lat: uint64_t },
         },
         recovery_stats: {
-            degraded: { count: uint64_t, bytes: uint64_t },
-            misplaced: { count: uint64_t, bytes: uint64_t },
+            degraded: { count: uint64_t, bytes: uint64_t, bps: uint64_t, iops: uint64_t },
+            misplaced: { count: uint64_t, bytes: uint64_t, bps: uint64_t, iops: uint64_t },
         },
         object_counts: {
             object: uint64_t,
@@ -319,22 +324,53 @@ class Mon
 {
     constructor(config)
     {
-        // FIXME: Maybe prefer local etcd
-        this.etcd_urls = [];
-        for (let url of config.etcd_url.split(/,/))
+        this.die = (e) => this._die(e);
+        if (fs.existsSync(config.config_path||'/etc/vitastor/vitastor.conf'))
         {
-            let scheme = 'http';
-            url = url.trim().replace(/^(https?):\/\//, (m, m1) => { scheme = m1; return ''; });
-            if (!/\/[^\/]/.exec(url))
-                url += '/v3';
-            this.etcd_urls.push(scheme+'://'+url);
+            config = {
+                ...JSON.parse(fs.readFileSync(config.config_path||'/etc/vitastor/vitastor.conf', { encoding: 'utf-8' })),
+                ...config,
+            };
         }
+        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()
@@ -344,7 +380,18 @@ 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()
@@ -386,11 +433,6 @@ 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)
@@ -399,6 +441,31 @@ 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;
@@ -408,7 +475,8 @@ class Mon
         }
         while (retries < 0 || retry < retries)
         {
-            const base = 'ws'+this.etcd_urls[Math.floor(Math.random()*this.etcd_urls.length)].substr(4);
+            const cur_addr = this.pick_next_etcd();
+            const base = 'ws'+cur_addr.substr(4);
             const ok = await new Promise((ok, no) =>
             {
                 const timer_id = setTimeout(() =>
@@ -431,9 +499,9 @@ class Mon
                 });
             });
             if (ok)
-            {
                 break;
-            }
+            if (this.selected_etcd_url == cur_addr)
+                this.selected_etcd_url = null;
             this.ws = null;
             retry++;
         }
@@ -441,6 +509,8 @@ 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+'/'),
@@ -460,12 +530,25 @@ class Mon
             catch (e)
             {
             }
-            if (!data || !data.result || !data.result.events)
+            if (!data || !data.result)
             {
-                if (!data || !data.result || !data.result.watch_id)
+                console.error('Unknown message received from watch websocket: '+msg);
+            }
+            else if (data.result.canceled)
+            {
+                // etcd watch canceled
+                if (data.result.compact_revision)
                 {
-                    console.error('Garbage received from watch websocket: '+msg);
+                    // 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
             {
@@ -498,7 +581,7 @@ class Mon
                 }
                 if (pg_states_changed)
                 {
-                    this.save_last_clean().catch(console.error);
+                    this.save_last_clean().catch(this.die);
                 }
                 if (stats_changed)
                 {
@@ -553,7 +636,7 @@ 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;
-        setInterval(async () =>
+        this.lease_timer = 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)
@@ -561,6 +644,19 @@ 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()
@@ -613,10 +709,13 @@ class Mon
         for (const node_id in this.state.config.node_placement||{})
         {
             const node_cfg = this.state.config.node_placement[node_id];
-            if (!node_id || /^\d/.exec(node_id) ||
-                !node_cfg.level || !levels[node_cfg.level])
+            if (/^\d+$/.exec(node_id))
             {
-                // All nodes must have non-empty non-numeric IDs and valid levels
+                node_cfg.level = 'osd';
+            }
+            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: [] };
@@ -649,10 +748,10 @@ class Mon
                         .reduce((a, c) => { a[c] = true; return a; }, {});
                 }
                 delete tree[osd_num].children;
-                if (!tree[tree[osd_num].parent])
+                if (!tree[stat.host])
                 {
-                    tree[tree[osd_num].parent] = {
-                        id: tree[osd_num].parent,
+                    tree[stat.host] = {
+                        id: stat.host,
                         level: 'host',
                         parent: null,
                         children: [],
@@ -998,6 +1097,7 @@ 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)
@@ -1059,7 +1159,9 @@ 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,
-                    raw_to_usable: pg_effsize / (pool_cfg.pg_size - (pool_cfg.parity_chunks||0)),
+                    pg_real_size: pg_effsize,
+                    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: {
@@ -1168,11 +1270,11 @@ class Mon
         this.recheck_timer = setTimeout(() =>
         {
             this.recheck_timer = null;
-            this.recheck_pgs().catch(console.error);
+            this.recheck_pgs().catch(this.die);
         }, this.config.mon_change_timeout || 1000);
     }
 
-    sum_op_stats()
+    sum_op_stats(timestamp, prev_stats)
     {
         const op_stats = {}, subop_stats = {}, recovery_stats = {};
         for (const osd in this.state.osd.stats)
@@ -1198,6 +1300,29 @@ 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 };
     }
 
@@ -1224,7 +1349,7 @@ class Mon
         return object_counts;
     }
 
-    sum_inode_stats()
+    sum_inode_stats(prev_stats, timestamp, prev_timestamp)
     {
         const inode_stats = {};
         const inode_stub = () => ({
@@ -1233,8 +1358,10 @@ 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;
         }
@@ -1242,7 +1369,12 @@ 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] || { used_raw_tb: 0n };
+                this.state.pool.stats[pool_id] = this.state.pool.stats[pool_id] || {};
+                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])
                 {
@@ -1253,7 +1385,7 @@ class Mon
                 }
             }
         }
-        for (const pool_id in this.state.config.pools)
+        for (const pool_id in seen_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;
@@ -1276,43 +1408,39 @@ class Mon
                 }
             }
         }
-        return inode_stats;
-    }
-
-    fix_stat_overflows(obj, scratch)
-    {
-        for (const k in obj)
+        if (prev_stats && prev_timestamp >= timestamp)
         {
-            if (typeof obj[k] == 'bigint')
+            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])
             {
-                if (obj[k] >= 0x10000000000000000n)
+                let nonzero = inode_stats[pool_id][inode_num].raw_used > 0;
+                for (const op of [ 'read', 'write', 'delete' ])
                 {
-                    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];
-                        }
-                    }
+                    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];
                 }
             }
-            else if (typeof obj[k] == 'object')
-            {
-                this.fix_stat_overflows(obj[k], scratch[k] = (scratch[k] || {}));
-            }
         }
+        return inode_stats;
     }
 
     serialize_bigints(obj)
     {
+        obj = { ...obj };
         for (const k in obj)
         {
             if (typeof obj[k] == 'bigint')
@@ -1321,22 +1449,26 @@ class Mon
             }
             else if (typeof obj[k] == 'object')
             {
-                this.serialize_bigints(obj[k]);
+                obj[k] = this.serialize_bigints(obj[k]);
             }
         }
+        return obj;
     }
 
     async update_total_stats()
     {
         const txn = [];
-        const stats = this.sum_op_stats();
+        const timestamp = Date.now();
         const object_counts = this.sum_object_counts();
-        const inode_stats = this.sum_inode_stats();
-        this.fix_stat_overflows(stats, (this.prev_stats = this.prev_stats || {}));
-        this.fix_stat_overflows(inode_stats, (this.prev_inode_stats = this.prev_inode_stats || {}));
+        let stats = this.sum_op_stats(timestamp, this.prev_stats);
+        let inode_stats = this.sum_inode_stats(
+            this.prev_stats ? this.prev_stats.inode_stats : null,
+            timestamp, this.prev_stats ? this.prev_stats.timestamp : null
+        );
+        this.prev_stats = { timestamp, ...stats, inode_stats };
         stats.object_counts = object_counts;
-        this.serialize_bigints(stats);
-        this.serialize_bigints(inode_stats);
+        stats = this.serialize_bigints(stats);
+        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)
         {
@@ -1348,11 +1480,25 @@ 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(this.state.pool.stats[pool_id])),
+                value: b64(JSON.stringify(pool_stats)),
             } });
         }
         if (txn.length)
@@ -1365,20 +1511,13 @@ class Mon
     {
         if (this.stats_timer)
         {
-            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;
+            return;
         }
         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);
-        }, sleep);
+        }, this.config.mon_stats_timeout);
     }
 
     parse_kv(kv)
@@ -1418,7 +1557,7 @@ class Mon
         cur[key_parts[key_parts.length-1]] = kv.value;
         if (key === 'config/global')
         {
-            this.config = this.state.config.global;
+            this.config = { ...this.initConfig, ...this.state.config.global };
             this.check_config();
             for (const osd_num in this.state.osd.stats)
             {
@@ -1455,12 +1594,15 @@ class Mon
         }
         while (retries < 0 || retry < retries)
         {
-            const base = this.etcd_urls[Math.floor(Math.random()*this.etcd_urls.length)];
+            retry++;
+            const base = this.pick_next_etcd();
             const res = await POST(base+path, body, timeout);
             if (res.error)
             {
-                console.error('etcd returned error: '+res.error);
-                break;
+                if (this.selected_etcd_url == base)
+                    this.selected_etcd_url = null;
+                console.error('failed to query etcd: '+res.error);
+                continue;
             }
             if (res.json)
             {
@@ -1469,26 +1611,20 @@ 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()
+    local_ips(all)
     {
         const ips = [];
         const ifaces = os.networkInterfaces();
@@ -1496,7 +1632,7 @@ class Mon
         {
             for (const iface of ifaces[ifname])
             {
-                if (iface.family == 'IPv4' && !iface.internal)
+                if (iface.family == 'IPv4' && !iface.internal || all)
                 {
                     ips.push(iface.address);
                 }

mon/test-optimize-unfeasible.js

@@ -0,0 +1,33 @@
+// 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);

patches/PVE_VitastorPlugin.pm

@@ -0,0 +1,503 @@
+# 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;

patches/cinder-vitastor.py

@@ -50,7 +50,7 @@ from cinder.volume import configuration
 from cinder.volume import driver
 from cinder.volume import volume_utils
 
-VERSION = '0.6.6'
+VERSION = '0.6.10'
 
 LOG = logging.getLogger(__name__)
 
@@ -266,7 +266,7 @@ class VitastorDriver(driver.CloneableImageVD,
             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]
+                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'
@@ -275,6 +275,15 @@ class VitastorDriver(driver.CloneableImageVD,
             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:
@@ -480,7 +489,7 @@ class VitastorDriver(driver.CloneableImageVD,
                 # FIXME use etcd_address in qemu driver
                 kk = 'etcd_host'
             if v:
-                args += ':'+kk+'='+v.replace(':', '\\:')
+                args += ':'+kk.replace('_', '-')+'='+v.replace(':', '\\:')
         return args
 
     def delete_volume(self, volume):
@@ -514,7 +523,7 @@ class VitastorDriver(driver.CloneableImageVD,
         # Clear data
         for kv in layers:
             args = [
-                'vitastor-cli', 'rm', '--pool', str(kv['value']['pool_id']),
+                'vitastor-cli', 'rm-data', '--pool', str(kv['value']['pool_id']),
                 '--inode', str(kv['value']['id']), '--progress', '0',
                 *(self._vitastor_args())
             ]
@@ -649,8 +658,8 @@ class VitastorDriver(driver.CloneableImageVD,
                 '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,
+                'logical_block_size': '512',
+                'physical_block_size': '4096',
             }
         }
         LOG.debug('connection data: %s', data)

patches/libvirt-5.0-vitastor.diff

@@ -1,4 +1,4 @@
-commit bd283191b3e7a4c6d1c100d3d96e348a1ebffe55
+commit 7f01510ef207940b07fac4f5fc8b9f1580b443aa
 Author: Vitaliy Filippov <vitalif@yourcmc.ru>
 Date:   Sun Jun 27 12:52:40 2021 +0300
 
@@ -65,10 +65,38 @@ index 4bf2b5f..dbc011b 100644
  
  int                     virConnectListAllStoragePools(virConnectPtr conn,
 diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
-index 222bb8c..685d255 100644
+index 222bb8c..2c30c55 100644
 --- a/src/conf/domain_conf.c
 +++ b/src/conf/domain_conf.c
-@@ -8653,6 +8653,10 @@ virDomainDiskSourceNetworkParse(xmlNodePtr node,
+@@ -4667,8 +4667,7 @@ virDomainDeviceDefPostParseCommon(virDomainDeviceDefPtr dev,
+     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;
      }
  
@@ -79,7 +107,7 @@ index 222bb8c..685d255 100644
      if ((haveTLS = virXMLPropString(node, "tls")) &&
          (src->haveTLS = virTristateBoolTypeFromString(haveTLS)) <= 0) {
          virReportError(VIR_ERR_XML_ERROR,
-@@ -23849,6 +23853,10 @@ virDomainDiskSourceFormatNetwork(virBufferPtr attrBuf,
+@@ -23849,6 +23856,10 @@ virDomainDiskSourceFormatNetwork(virBufferPtr attrBuf,
  
      virBufferEscapeString(attrBuf, " name='%s'", path ? path : src->path);
  
@@ -90,7 +118,7 @@ index 222bb8c..685d255 100644
      VIR_FREE(path);
  
      if (src->haveTLS != VIR_TRISTATE_BOOL_ABSENT &&
-@@ -30930,6 +30938,7 @@ virDomainDiskTranslateSourcePool(virDomainDiskDefPtr def)
+@@ -30930,6 +30941,7 @@ virDomainDiskTranslateSourcePool(virDomainDiskDefPtr def)
  
      case VIR_STORAGE_POOL_MPATH:
      case VIR_STORAGE_POOL_RBD:
@@ -216,7 +244,7 @@ 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..096700d 100644
+index cbf0aa4..f0ca9e7 100644
 --- a/src/qemu/qemu_block.c
 +++ b/src/qemu/qemu_block.c
 @@ -959,6 +959,42 @@ qemuBlockStorageSourceGetRBDProps(virStorageSourcePtr src)
@@ -245,9 +273,9 @@ index cbf0aa4..096700d 100644
 +
 +    if (virJSONValueObjectCreate(&ret,
 +                                 "s:driver", "vitastor",
-+                                 "S:etcd_host", etcd,
-+                                 "S:etcd_prefix", src->relPath,
-+                                 "S:config_path", src->configFile,
++                                 "S:etcd-host", etcd,
++                                 "S:etcd-prefix", src->relPath,
++                                 "S:config-path", src->configFile,
 +                                 "s:image", src->path,
 +                                 NULL) < 0)
 +        goto cleanup;
@@ -275,7 +303,7 @@ index cbf0aa4..096700d 100644
              if (!(fileprops = qemuBlockStorageSourceGetSheepdogProps(src)))
                  return NULL;
 diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
-index 822d5f8..e375cef 100644
+index 822d5f8..abec34e 100644
 --- a/src/qemu/qemu_command.c
 +++ b/src/qemu/qemu_command.c
 @@ -975,6 +975,43 @@ qemuBuildNetworkDriveStr(virStorageSourcePtr src,
@@ -293,7 +321,7 @@ index 822d5f8..e375cef 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, ",");
@@ -311,10 +339,10 @@ index 822d5f8..e375cef 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;
@@ -387,7 +415,7 @@ 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..b323cd6 100644
+index bd4b027..8454906 100644
 --- a/src/util/virstoragefile.c
 +++ b/src/util/virstoragefile.c
 @@ -84,7 +84,8 @@ VIR_ENUM_IMPL(virStorageNetProtocol, VIR_STORAGE_NET_PROTOCOL_LAST,
@@ -438,16 +466,16 @@ index bd4b027..b323cd6 100644
 +        if (STRPREFIX(p, "image=")) {
 +            if (VIR_STRDUP(src->path, p + strlen("image=")) < 0)
 +                return -1;
-+        } else if (STRPREFIX(p, "etcd_prefix=")) {
-+            if (VIR_STRDUP(src->relPath, p + strlen("etcd_prefix=")) < 0)
++        } else if (STRPREFIX(p, "etcd-prefix=")) {
++            if (VIR_STRDUP(src->relPath, p + strlen("etcd-prefix=")) < 0)
 +                return -1;
-+        } else if (STRPREFIX(p, "config_file=")) {
-+            if (VIR_STRDUP(src->configFile, p + strlen("config_file=")) < 0)
++        } else if (STRPREFIX(p, "config-path=")) {
++            if (VIR_STRDUP(src->configFile, p + strlen("config-path=")) < 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] == ',' ||
@@ -507,8 +535,8 @@ index bd4b027..b323cd6 100644
 +{
 +    const char *filename;
 +    const char *image = virJSONValueObjectGetString(json, "image");
-+    const char *conf = virJSONValueObjectGetString(json, "config_path");
-+    const char *etcd_prefix = virJSONValueObjectGetString(json, "etcd_prefix");
++    const char *conf = virJSONValueObjectGetString(json, "config-path");
++    const char *etcd_prefix = virJSONValueObjectGetString(json, "etcd-prefix");
 +    virJSONValuePtr servers = virJSONValueObjectGetArray(json, "server");
 +    size_t nservers;
 +    size_t i;

patches/libvirt-7.0-vitastor.diff

@@ -1,4 +1,4 @@
-commit 41cdfe8317d98f70aadedfdbb381effed2641bdd
+commit 4e74c622884e2585b2cfcdf322fbd2bff6de41ca
 Author: Vitaliy Filippov <vitalif@yourcmc.ru>
 Date:   Fri Jul 9 01:31:57 2021 +0300
 
@@ -65,10 +65,38 @@ index 089e1e0..d7e7ef4 100644
  
  int                     virConnectListAllStoragePools(virConnectPtr conn,
 diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
-index 01b7187..c6e9702 100644
+index 01b7187..645c758 100644
 --- a/src/conf/domain_conf.c
 +++ b/src/conf/domain_conf.c
-@@ -8261,7 +8261,8 @@ virDomainDiskSourceNetworkParse(xmlNodePtr node,
+@@ -5230,8 +5230,7 @@ virDomainDiskDefPostParse(virDomainDiskDefPtr disk,
+                           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 ||
@@ -78,7 +106,7 @@ index 01b7187..c6e9702 100644
          src->query = virXMLPropString(node, "query");
  
      if (virDomainStorageNetworkParseHosts(node, ctxt, &src->hosts, &src->nhosts) < 0)
-@@ -31392,6 +31393,7 @@ virDomainStorageSourceTranslateSourcePool(virStorageSourcePtr src,
+@@ -31392,6 +31396,7 @@ virDomainStorageSourceTranslateSourcePool(virStorageSourcePtr src,
  
      case VIR_STORAGE_POOL_MPATH:
      case VIR_STORAGE_POOL_RBD:
@@ -216,7 +244,7 @@ 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..922dde5 100644
+index f9c6da2..d837a05 100644
 --- a/src/qemu/qemu_block.c
 +++ b/src/qemu/qemu_block.c
 @@ -938,6 +938,38 @@ qemuBlockStorageSourceGetRBDProps(virStorageSourcePtr src,
@@ -244,9 +272,9 @@ index f9c6da2..922dde5 100644
 +    }
 +
 +    if (virJSONValueObjectCreate(&ret,
-+                                 "S:etcd_host", etcd,
-+                                 "S:etcd_prefix", src->query,
-+                                 "S:config_path", src->configFile,
++                                 "S:etcd-host", etcd,
++                                 "S:etcd-prefix", src->query,
++                                 "S:config-path", src->configFile,
 +                                 "s:image", src->path,
 +                                 NULL) < 0)
 +        return NULL;
@@ -293,7 +321,7 @@ index f9c6da2..922dde5 100644
              driver = "sheepdog";
              if (!(location = qemuBlockStorageSourceGetSheepdogProps(src)))
 diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
-index 6f970a3..10b39ca 100644
+index 6f970a3..4c03fb8 100644
 --- a/src/qemu/qemu_command.c
 +++ b/src/qemu/qemu_command.c
 @@ -1034,6 +1034,43 @@ qemuBuildNetworkDriveStr(virStorageSourcePtr src,
@@ -311,7 +339,7 @@ index 6f970a3..10b39ca 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, ",");
@@ -329,10 +357,10 @@ index 6f970a3..10b39ca 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;
@@ -415,7 +443,7 @@ 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..36e3afc 100644
+index 0d3c2af..edb7f9e 100644
 --- a/src/util/virstoragefile.c
 +++ b/src/util/virstoragefile.c
 @@ -91,6 +91,7 @@ VIR_ENUM_IMPL(virStorageNetProtocol,
@@ -462,14 +490,14 @@ index 0d3c2af..36e3afc 100644
 +
 +        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_file=")) {
-+            src->configFile = g_strdup(p + strlen("config_file="));
-+        } else if (STRPREFIX(p, "etcd_host=")) {
++        } 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=");
++            h = p + strlen("etcd-host=");
 +            while (h < e) {
 +                for (sep = h; sep < e; ++sep) {
 +                    if (*sep == '\\' && (sep[1] == ',' ||
@@ -526,8 +554,8 @@ index 0d3c2af..36e3afc 100644
 +{
 +    const char *filename;
 +    const char *image = virJSONValueObjectGetString(json, "image");
-+    const char *conf = virJSONValueObjectGetString(json, "config_path");
-+    const char *etcd_prefix = virJSONValueObjectGetString(json, "etcd_prefix");
++    const char *conf = virJSONValueObjectGetString(json, "config-path");
++    const char *etcd_prefix = virJSONValueObjectGetString(json, "etcd-prefix");
 +    virJSONValuePtr servers = virJSONValueObjectGetArray(json, "server");
 +    size_t nservers;
 +    size_t i;

patches/libvirt-7.5-vitastor.diff

@@ -1,4 +1,4 @@
-commit c6e1958a1b4974828e8e5852beb252ce6594e670
+commit c97d7f2bfb7798f0d68bdba2646245dcfb940efa
 Author: Vitaliy Filippov <vitalif@yourcmc.ru>
 Date:   Mon Jun 28 01:20:19 2021 +0300
 
@@ -86,6 +86,37 @@ 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
@@ -248,7 +279,7 @@ 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..c33f428 100644
+index 6627d04..f769d24 100644
 --- a/src/qemu/qemu_block.c
 +++ b/src/qemu/qemu_block.c
 @@ -928,6 +928,38 @@ qemuBlockStorageSourceGetRBDProps(virStorageSource *src,
@@ -276,9 +307,9 @@ index 6627d04..c33f428 100644
 +    }
 +
 +    if (virJSONValueObjectCreate(&ret,
-+                                 "S:etcd_host", etcd,
-+                                 "S:etcd_prefix", src->query,
-+                                 "S:config_path", src->configFile,
++                                 "S:etcd-host", etcd,
++                                 "S:etcd-prefix", src->query,
++                                 "S:config-path", src->configFile,
 +                                 "s:image", src->path,
 +                                 NULL) < 0)
 +        return NULL;
@@ -325,7 +356,7 @@ index 6627d04..c33f428 100644
              driver = "sheepdog";
              if (!(location = qemuBlockStorageSourceGetSheepdogProps(src)))
 diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
-index ea51369..8258632 100644
+index ea51369..d714597 100644
 --- a/src/qemu/qemu_command.c
 +++ b/src/qemu/qemu_command.c
 @@ -1074,6 +1074,43 @@ qemuBuildNetworkDriveStr(virStorageSource *src,
@@ -343,7 +374,7 @@ index ea51369..8258632 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, ",");
@@ -361,10 +392,10 @@ index ea51369..8258632 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;
@@ -435,7 +466,7 @@ 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..d7a9b72 100644
+index e48ae72..2017ccc 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,
@@ -474,14 +505,14 @@ index e48ae72..d7a9b72 100644
 +
 +        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_file=")) {
-+            src->configFile = g_strdup(p + strlen("config_file="));
-+        } else if (STRPREFIX(p, "etcd_host=")) {
++        } 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=");
++            h = p + strlen("etcd-host=");
 +            while (h < e) {
 +                for (sep = h; sep < e; ++sep) {
 +                    if (*sep == '\\' && (sep[1] == ',' ||
@@ -538,8 +569,8 @@ index e48ae72..d7a9b72 100644
 +{
 +    const char *filename;
 +    const char *image = virJSONValueObjectGetString(json, "image");
-+    const char *conf = virJSONValueObjectGetString(json, "config_path");
-+    const char *etcd_prefix = virJSONValueObjectGetString(json, "etcd_prefix");
++    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;

patches/libvirt-7.6-vitastor.diff

@@ -0,0 +1,692 @@
+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;
+             }

patches/libvirt-example.xml

@@ -15,9 +15,10 @@
       <target dev='vda' bus='virtio' />
       <driver name='qemu' type='raw' />
       <!-- name is Vitastor image name -->
-      <!-- config (optional) is the path to Vitastor's configuration file -->
       <!-- query (optional) is Vitastor's etcd_prefix -->
-      <source protocol='vitastor' name='debian9' query='/vitastor' config='/etc/vitastor/vitastor.conf'>
+      <source protocol='vitastor' name='debian9' query='/vitastor'>
+        <!-- config (optional) is the path to Vitastor's configuration file -->
+        <config file='/etc/vitastor/vitastor.conf' />
         <!-- hosts = etcd addresses -->
         <host name='192.168.7.2' port='2379' />
       </source>

patches/nova-21.diff

@@ -0,0 +1,288 @@
+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

patches/nova-23.diff

@@ -1,5 +1,5 @@
 diff --git a/nova/virt/image/model.py b/nova/virt/image/model.py
-index 971f7e9c07..70ed70d5e2 100644
+index 971f7e9c07..ec3fca72cb 100644
 --- a/nova/virt/image/model.py
 +++ b/nova/virt/image/model.py
 @@ -129,3 +129,22 @@ class RBDImage(Image):
@@ -19,7 +19,7 @@ index 971f7e9c07..70ed70d5e2 100644
 +        :param etcd_prefix: etcd prefix (optional)
 +        :param config_path: path to the configuration (optional)
 +        """
-+        super(RBDImage, self).__init__(FORMAT_RAW)
++        super(VitastorImage, self).__init__(FORMAT_RAW)
 +
 +        self.name = name
 +        self.etcd_address = etcd_address
@@ -48,7 +48,7 @@ index 5358f3766a..ebe3d6effb 100644
  
      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..51573fe41d 100644
+index f9475776b3..a2e18aab67 100644
 --- a/nova/virt/libvirt/config.py
 +++ b/nova/virt/libvirt/config.py
 @@ -1060,6 +1060,8 @@ class LibvirtConfigGuestDisk(LibvirtConfigGuestDevice):
@@ -60,18 +60,19 @@ index f9475776b3..51573fe41d 100644
          self.source_name = None
          self.source_hosts = []
          self.source_ports = []
-@@ -1186,7 +1188,8 @@ class LibvirtConfigGuestDisk(LibvirtConfigGuestDevice):
-         elif self.source_type == "mount":
-             dev.append(etree.Element("source", dir=self.source_path))
-         elif self.source_type == "network" and self.source_protocol:
--            source = etree.Element("source", protocol=self.source_protocol)
-+            source = etree.Element("source", protocol=self.source_protocol,
-+                query=self.source_query, config=self.source_config)
+@@ -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..34dc60dcdd 100644
+index 391231c527..f38faa1608 100644
 --- a/nova/virt/libvirt/driver.py
 +++ b/nova/virt/libvirt/driver.py
 @@ -179,6 +179,7 @@ VOLUME_DRIVERS = {
@@ -124,7 +125,7 @@ index 391231c527..34dc60dcdd 100644
 +                            if kk == 'etcd_address':
 +                                # FIXME use etcd_address in qemu driver
 +                                kk = 'etcd_host'
-+                            path += ":"+kk+"="+connection_info['data'][k].replace(':', '\\:')
++                            path += ":"+kk.replace('_', '-')+"="+connection_info['data'][k].replace(':', '\\:')
                  else:
                      path = 'unknown'
                      raise exception.DiskNotFound(location='unknown')

patches/pve-qemu-5.1-vitastor.patch

@@ -0,0 +1,175 @@
+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)

patches/pve-qemu-5.2-vitastor.patch

@@ -0,0 +1,181 @@
+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()}

patches/pve-qemu-6.1-vitastor.patch

@@ -0,0 +1,188 @@
+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',

patches/qemu-3.1-vitastor.patch

@@ -1,7 +1,107 @@
-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
+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',
@@ -11,10 +111,11 @@ Index: qemu-3.1+dfsg/qapi/block-core.json
              '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 @@
+@@ -3366,6 +3366,28 @@
+             '*snap-id': 'uint32',
              '*tag': 'str' } }
  
- ##
++##
 +# @BlockdevOptionsVitastor:
 +#
 +# Driver specific block device options for vitastor
@@ -23,24 +124,23 @@ Index: qemu-3.1+dfsg/qapi/block-core.json
 +# @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
++# @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' } }
++            '*config-path': 'str',
++            '*etcd-host': 'str',
++            '*etcd-prefix': 'str' } }
 +
-+##
+ ##
  # @ReplicationMode:
  #
- # An enumeration of replication modes.
-@@ -3713,6 +3731,7 @@
+@@ -3713,6 +3735,7 @@
        'rbd':        'BlockdevOptionsRbd',
        'replication':'BlockdevOptionsReplication',
        'sheepdog':   'BlockdevOptionsSheepdog',
@@ -48,10 +148,11 @@ Index: qemu-3.1+dfsg/qapi/block-core.json
        'ssh':        'BlockdevOptionsSsh',
        'throttle':   'BlockdevOptionsThrottle',
        'vdi':        'BlockdevOptionsGenericFormat',
-@@ -4158,6 +4177,17 @@
+@@ -4157,6 +4180,17 @@
+             '*subformat':           'BlockdevVhdxSubformat',
              '*block-state-zero':    'bool' } }
  
- ##
++##
 +# @BlockdevCreateOptionsVitastor:
 +#
 +# Driver specific image creation options for Vitastor.
@@ -62,11 +163,10 @@ Index: qemu-3.1+dfsg/qapi/block-core.json
 +  'data': { 'location':         'BlockdevOptionsVitastor',
 +            'size':             'size' } }
 +
-+##
+ ##
  # @BlockdevVpcSubformat:
  #
- # @dynamic: Growing image file
-@@ -4212,6 +4242,7 @@
+@@ -4212,6 +4246,7 @@
        'qed':            'BlockdevCreateOptionsQed',
        'rbd':            'BlockdevCreateOptionsRbd',
        'sheepdog':       'BlockdevCreateOptionsSheepdog',
@@ -74,15 +174,3 @@ Index: qemu-3.1+dfsg/qapi/block-core.json
        '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):

patches/qemu-4.2-vitastor.patch

@@ -1,8 +1,105 @@
-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 @@
+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)' },
@@ -11,7 +108,7 @@ Index: qemu/qapi/block-core.json
              'ssh', 'throttle', 'vdi', 'vhdx', 'vmdk', 'vpc', 'vvfat', 'vxhs' ] }
  
  ##
-@@ -3725,6 +3725,28 @@
+@@ -3712,6 +3712,28 @@
              '*tag': 'str' } }
  
  ##
@@ -23,24 +120,24 @@ Index: qemu/qapi/block-core.json
 +# @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
++# @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' } }
++            '*config-path': 'str',
++            '*etcd-host': 'str',
++            '*etcd-prefix': 'str' } }
 +
 +##
  # @ReplicationMode:
  #
  # An enumeration of replication modes.
-@@ -4084,6 +4102,7 @@
+@@ -4071,6 +4093,7 @@
        'replication': { 'type': 'BlockdevOptionsReplication',
                         'if': 'defined(CONFIG_REPLICATION)' },
        'sheepdog':   'BlockdevOptionsSheepdog',
@@ -48,7 +145,7 @@ Index: qemu/qapi/block-core.json
        'ssh':        'BlockdevOptionsSsh',
        'throttle':   'BlockdevOptionsThrottle',
        'vdi':        'BlockdevOptionsGenericFormat',
-@@ -4461,6 +4480,17 @@
+@@ -4441,6 +4464,17 @@
              '*cluster-size' :   'size' } }
  
  ##
@@ -66,7 +163,7 @@ Index: qemu/qapi/block-core.json
  # @BlockdevVmdkSubformat:
  #
  # Subformat options for VMDK images
-@@ -4722,6 +4752,7 @@
+@@ -4702,6 +4736,7 @@
        'qed':            'BlockdevCreateOptionsQed',
        'rbd':            'BlockdevCreateOptionsRbd',
        'sheepdog':       'BlockdevCreateOptionsSheepdog',
@@ -74,15 +171,3 @@ Index: qemu/qapi/block-core.json
        '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):

patches/qemu-5.0-vitastor.patch

@@ -1,7 +1,107 @@
-Index: qemu/qapi/block-core.json
-===================================================================
---- qemu.orig/qapi/block-core.json
-+++ qemu/qapi/block-core.json
+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',
@@ -11,10 +111,11 @@ Index: qemu/qapi/block-core.json
              'ssh', 'throttle', 'vdi', 'vhdx', 'vmdk', 'vpc', 'vvfat', 'vxhs' ] }
  
  ##
-@@ -3635,6 +3635,28 @@
+@@ -3634,6 +3634,28 @@
+             '*snap-id': 'uint32',
              '*tag': 'str' } }
  
- ##
++##
 +# @BlockdevOptionsVitastor:
 +#
 +# Driver specific block device options for vitastor
@@ -23,24 +124,23 @@ Index: qemu/qapi/block-core.json
 +# @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
++# @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' } }
++            '*config-path': 'str',
++            '*etcd-host': 'str',
++            '*etcd-prefix': 'str' } }
 +
-+##
+ ##
  # @ReplicationMode:
  #
- # An enumeration of replication modes.
-@@ -3995,6 +4013,7 @@
+@@ -3995,6 +4017,7 @@
        'replication': { 'type': 'BlockdevOptionsReplication',
                         'if': 'defined(CONFIG_REPLICATION)' },
        'sheepdog':   'BlockdevOptionsSheepdog',
@@ -48,10 +148,11 @@ Index: qemu/qapi/block-core.json
        'ssh':        'BlockdevOptionsSsh',
        'throttle':   'BlockdevOptionsThrottle',
        'vdi':        'BlockdevOptionsGenericFormat',
-@@ -4365,6 +4384,17 @@
+@@ -4364,6 +4387,17 @@
+             'size':             'size',
              '*cluster-size' :   'size' } }
  
- ##
++##
 +# @BlockdevCreateOptionsVitastor:
 +#
 +# Driver specific image creation options for Vitastor.
@@ -62,11 +163,10 @@ Index: qemu/qapi/block-core.json
 +  'data': { 'location':         'BlockdevOptionsVitastor',
 +            'size':             'size' } }
 +
-+##
+ ##
  # @BlockdevVmdkSubformat:
  #
- # Subformat options for VMDK images
-@@ -4626,6 +4656,7 @@
+@@ -4626,6 +4660,7 @@
        'qed':            'BlockdevCreateOptionsQed',
        'rbd':            'BlockdevCreateOptionsRbd',
        'sheepdog':       'BlockdevCreateOptionsSheepdog',
@@ -74,15 +174,3 @@ Index: qemu/qapi/block-core.json
        '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):

patches/qemu-5.1-vitastor.patch

@@ -1,8 +1,8 @@
-Index: qemu-5.1+dfsg/qapi/block-core.json
+Index: qemu-5.2+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 @@
+--- 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)' },
@@ -11,7 +11,7 @@ Index: qemu-5.1+dfsg/qapi/block-core.json
              'ssh', 'throttle', 'vdi', 'vhdx', 'vmdk', 'vpc', 'vvfat' ] }
  
  ##
-@@ -3644,6 +3644,28 @@
+@@ -3668,6 +3668,28 @@
              '*tag': 'str' } }
  
  ##
@@ -23,24 +23,24 @@ Index: qemu-5.1+dfsg/qapi/block-core.json
 +# @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
++# @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' } }
++            '*config-path': 'str',
++            '*etcd-host': 'str',
++            '*etcd-prefix': 'str' } }
 +
 +##
  # @ReplicationMode:
  #
  # An enumeration of replication modes.
-@@ -3988,6 +4006,7 @@
+@@ -4015,6 +4037,7 @@
        'replication': { 'type': 'BlockdevOptionsReplication',
                         'if': 'defined(CONFIG_REPLICATION)' },
        'sheepdog':   'BlockdevOptionsSheepdog',
@@ -48,7 +48,7 @@ Index: qemu-5.1+dfsg/qapi/block-core.json
        'ssh':        'BlockdevOptionsSsh',
        'throttle':   'BlockdevOptionsThrottle',
        'vdi':        'BlockdevOptionsGenericFormat',
-@@ -4376,6 +4395,17 @@
+@@ -4404,6 +4427,17 @@
              '*cluster-size' :   'size' } }
  
  ##
@@ -66,7 +66,7 @@ Index: qemu-5.1+dfsg/qapi/block-core.json
  # @BlockdevVmdkSubformat:
  #
  # Subformat options for VMDK images
-@@ -4637,6 +4667,7 @@
+@@ -4665,6 +4699,7 @@
        'qed':            'BlockdevCreateOptionsQed',
        'rbd':            'BlockdevCreateOptionsRbd',
        'sheepdog':       'BlockdevCreateOptionsSheepdog',
@@ -74,15 +74,108 @@ Index: qemu-5.1+dfsg/qapi/block-core.json
        'ssh':            'BlockdevCreateOptionsSsh',
        'vdi':            'BlockdevCreateOptionsVdi',
        'vhdx':           'BlockdevCreateOptionsVhdx',
-Index: qemu-5.1+dfsg/scripts/modules/module_block.py
+Index: qemu-5.2+dfsg/block/meson.build
 ===================================================================
---- 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")
+--- 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
  
-         for filename in sys.argv[2:]:
-             if os.path.isfile(filename):
+ ##########################################
++# 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()}

patches/qemu-6.0-vitastor.patch

@@ -0,0 +1,188 @@
+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'
+   } }

patches/qemu-6.1-vitastor.patch

@@ -0,0 +1,188 @@
+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',

patches/qemu-make-patches.sh

@@ -0,0 +1,15 @@
+#!/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

rpm/build-tarball.sh

@@ -1,5 +1,5 @@
 #!/bin/bash
-# Vitastor depends on QEMU and FIO headers, but QEMU and FIO don't have -devel packages
+# Vitastor depends on QEMU and/or FIO headers, but QEMU and FIO don't have -devel packages
 # So we have to copy their headers into the source tarball
 
 set -e
@@ -18,34 +18,11 @@ 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
-perl -i -pe 's/(Requires:\s*qemu(?:-kvm)?)([^\n]+)?/$1 = '$QEMU'/' $VITASTOR/rpm/vitastor-el$EL.spec
-tar --transform 's#^#vitastor-0.6.6/#' --exclude 'rpm/*.rpm' -czf $VITASTOR/../vitastor-0.6.6$(rpm --eval '%dist').tar.gz *
+tar --transform 's#^#vitastor-0.6.10/#' --exclude 'rpm/*.rpm' -czf $VITASTOR/../vitastor-0.6.10$(rpm --eval '%dist').tar.gz *

rpm/qemu-el8.Dockerfile

@@ -1,3 +1,6 @@
+# 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 .
 

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	2020-12-06 10:44:24.207640963 +0000
++++ qemu-kvm.spec	2021-12-01 21:53:30.895747529 +0000
 @@ -2,7 +2,7 @@
  %global SLOF_gittagcommit 899d9883
  
@@ -9,25 +9,24 @@
  %global have_opengl   1
  %global have_fdt      0
  %global have_gluster  1
-@@ -56,7 +56,7 @@ Requires: %{name}-block-curl = %{epoch}:
- Requires: %{name}-block-gluster = %{epoch}:%{version}-%{release} \
+@@ -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-rbd = %{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 +67,7 @@ Obsoletes: %1-rhev
+@@ -67,7 +68,7 @@ Obsoletes: %1-rhev
  Summary: QEMU is a machine emulator and virtualizer
  Name: qemu-kvm
  Version: 4.2.0
 -Release: 29.vitastor%{?dist}.6
-+Release: 30.vitastor%{?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
-@@ -99,8 +99,8 @@ Source30: kvm-s390x.conf
+@@ -99,9 +100,10 @@ Source30: kvm-s390x.conf
  Source31: kvm-x86.conf
  Source32: qemu-pr-helper.service
  Source33: qemu-pr-helper.socket
@@ -36,9 +35,11 @@
 +#Source34: 81-kvm-rhel.rules
 +#Source35: udev-kvm-check.c
  Source36: README.tests
++Source37: qemu-vitastor.c
  
  
-@@ -825,7 +825,9 @@ Patch331: kvm-Drop-bogus-IPv6-messages.p
+ Patch0005: 0005-Initial-redhat-build.patch
+@@ -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
@@ -49,7 +50,7 @@
  
  BuildRequires: wget
  BuildRequires: rpm-build
-@@ -842,7 +844,8 @@ BuildRequires: pciutils-devel
+@@ -842,7 +846,8 @@ BuildRequires: pciutils-devel
  BuildRequires: libiscsi-devel
  BuildRequires: ncurses-devel
  BuildRequires: libattr-devel
@@ -59,7 +60,7 @@
  %if %{have_usbredir}
  BuildRequires: usbredir-devel >= 0.7.1
  %endif
-@@ -856,12 +859,12 @@ BuildRequires: virglrenderer-devel
+@@ -856,12 +861,13 @@ BuildRequires: virglrenderer-devel
  # For smartcard NSS support
  BuildRequires: nss-devel
  %endif
@@ -70,12 +71,13 @@
  BuildRequires: libssh-devel
 -BuildRequires: librados-devel
 -BuildRequires: librbd-devel
-+#BuildRequires: librados-devel
-+#BuildRequires: librbd-devel
++BuildRequires: librados2-devel
++BuildRequires: librbd1-devel
++BuildRequires: vitastor-client-devel
  %if %{have_gluster}
  # For gluster block driver
  BuildRequires: glusterfs-api-devel
-@@ -955,25 +958,25 @@ hardware for a full system such as a PC
+@@ -955,25 +961,25 @@ hardware for a full system such as a PC
  
  %package -n qemu-kvm-core
  Summary: qemu-kvm core components
@@ -105,38 +107,35 @@
  # For compressed guest memory dumps
  Requires: lzo snappy
  %if %{have_kvm_setup}
-@@ -1085,15 +1088,15 @@ This package provides the additional iSC
- 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.
+@@ -1096,6 +1102,14 @@ 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
-@@ -1117,12 +1120,14 @@ the Secure Shell (SSH) protocol.
+ Summary: QEMU SSH block driver
+ 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,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
++%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
@@ -146,12 +145,20 @@
  ./configure  \
   --prefix="%{_prefix}" \
   --libdir="%{_libdir}" \
-@@ -1152,15 +1157,15 @@ buildldflags="VL_LDFLAGS=-Wl,--build-id"
- %else
+@@ -1132,7 +1148,7 @@ 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 \
+@@ -1153,14 +1169,15 @@ buildldflags="VL_LDFLAGS=-Wl,--build-id"
    --disable-numa \
  %endif
--  --enable-rbd \
-+  --disable-rbd \
+   --enable-rbd \
++  --enable-vitastor \
  %if 0%{have_librdma}
    --enable-rdma \
  %else
@@ -165,7 +172,7 @@
    --enable-spice \
    --enable-smartcard \
    --enable-virglrenderer \
-@@ -1179,7 +1184,7 @@ buildldflags="VL_LDFLAGS=-Wl,--build-id"
+@@ -1179,7 +1196,7 @@ buildldflags="VL_LDFLAGS=-Wl,--build-id"
  %else
    --disable-usb-redir \
  %endif
@@ -174,7 +181,7 @@
  %ifarch x86_64
    --enable-libpmem \
  %else
-@@ -1193,9 +1198,7 @@ buildldflags="VL_LDFLAGS=-Wl,--build-id"
+@@ -1193,9 +1210,7 @@ buildldflags="VL_LDFLAGS=-Wl,--build-id"
  %endif
    --python=%{__python3} \
    --target-list="%{buildarch}" \
@@ -184,7 +191,7 @@
    --with-coroutine=ucontext \
    --tls-priority=NORMAL \
    --disable-bluez \
-@@ -1262,7 +1265,7 @@ buildldflags="VL_LDFLAGS=-Wl,--build-id"
+@@ -1262,7 +1277,7 @@ buildldflags="VL_LDFLAGS=-Wl,--build-id"
    --disable-sanitizers \
    --disable-hvf \
    --disable-whpx \
@@ -193,7 +200,7 @@
    --disable-membarrier \
    --disable-vhost-crypto \
    --disable-libxml2 \
-@@ -1308,7 +1311,7 @@ make V=1 %{?_smp_mflags} $buildldflags
+@@ -1308,7 +1323,7 @@ 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
@@ -202,7 +209,7 @@
  
  %install
  %define _udevdir %(pkg-config --variable=udevdir udev)
-@@ -1343,8 +1346,8 @@ mkdir -p $RPM_BUILD_ROOT%{testsdir}/test
+@@ -1343,8 +1358,8 @@ mkdir -p $RPM_BUILD_ROOT%{testsdir}/test
  mkdir -p $RPM_BUILD_ROOT%{testsdir}/tests/qemu-iotests
  mkdir -p $RPM_BUILD_ROOT%{testsdir}/scripts/qmp
  
@@ -213,7 +220,7 @@
  
  install -m 0644 scripts/dump-guest-memory.py \
                  $RPM_BUILD_ROOT%{_datadir}/%{name}
-@@ -1562,6 +1565,8 @@ rm -rf $RPM_BUILD_ROOT%{qemudocdir}/inte
+@@ -1562,6 +1577,8 @@ rm -rf $RPM_BUILD_ROOT%{qemudocdir}/inte
  # Remove spec
  rm -rf $RPM_BUILD_ROOT%{qemudocdir}/specs
  
@@ -222,7 +229,7 @@
  %check
  export DIFF=diff; make check V=1
  
-@@ -1645,8 +1650,8 @@ useradd -r -u 107 -g qemu -G kvm -d / -s
+@@ -1645,8 +1662,8 @@ useradd -r -u 107 -g qemu -G kvm -d / -s
  %config(noreplace) %{_sysconfdir}/sysconfig/ksm
  %{_unitdir}/ksmtuned.service
  %{_sbindir}/ksmtuned
@@ -233,7 +240,7 @@
  %ghost %{_sysconfdir}/kvm
  %config(noreplace) %{_sysconfdir}/ksmtuned.conf
  %dir %{_sysconfdir}/%{name}
-@@ -1711,8 +1716,8 @@ useradd -r -u 107 -g qemu -G kvm -d / -s
+@@ -1711,8 +1728,8 @@ useradd -r -u 107 -g qemu -G kvm -d / -s
  %{_libexecdir}/vhost-user-gpu
  %{_datadir}/%{name}/vhost-user/50-qemu-gpu.json
  %endif
@@ -244,14 +251,13 @@
  
  %files -n qemu-img
  %defattr(-,root,root)
-@@ -1748,8 +1753,8 @@ useradd -r -u 107 -g qemu -G kvm -d / -s
- %files block-iscsi
- %{_libdir}/qemu-kvm/block-iscsi.so
- 
--%files block-rbd
--%{_libdir}/qemu-kvm/block-rbd.so
-+#%files block-rbd
-+#%{_libdir}/qemu-kvm/block-rbd.so
+@@ -1751,6 +1768,9 @@ 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
+ 

rpm/qemu-kvm-4.2-el8.spec.patch

@@ -0,0 +1,112 @@
+--- 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
+ 

rpm/qemu-kvm-6.0-el8.spec.patch

@@ -0,0 +1,103 @@
+--- 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
+ 

rpm/qemu-kvm.spec.patch

@@ -1,29 +0,0 @@
---- 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 \

rpm/vitastor-el7.Dockerfile

@@ -9,15 +9,11 @@ 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 gperftools-devel qemu-kvm fio rh-nodejs12 jerasure-devel gf-complete-devel
-RUN yumdownloader --disablerepo=centos-sclo-rh --source qemu-kvm
+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 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 qemu-kvm.spec
 RUN cd ~/rpmbuild/SPECS && yum-builddep -y fio.spec
-RUN yum -y install rdma-core-devel
 
 ADD https://vitastor.io/rpms/liburing-el7/liburing-0.7-2.el7.src.rpm /root
 
@@ -38,7 +34,7 @@ ADD . /root/vitastor
 RUN set -e; \
     cd /root/vitastor/rpm; \
     sh build-tarball.sh; \
-    cp /root/vitastor-0.6.6.el7.tar.gz ~/rpmbuild/SOURCES; \
+    cp /root/vitastor-0.6.10.el7.tar.gz ~/rpmbuild/SOURCES; \
     cp vitastor-el7.spec ~/rpmbuild/SPECS/vitastor.spec; \
     cd ~/rpmbuild/SPECS/; \
     rpmbuild -ba vitastor.spec; \

rpm/vitastor-el7.spec

@@ -1,11 +1,11 @@
 Name:           vitastor
-Version:        0.6.6
+Version:        0.6.10
 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-0.6.6.el7.tar.gz
+Source0:        vitastor-0.6.10.el7.tar.gz
 
 BuildRequires:  liburing-devel >= 0.6
 BuildRequires:  gperftools-devel
@@ -16,13 +16,11 @@ BuildRequires:  jerasure-devel
 BuildRequires:  gf-complete-devel
 BuildRequires:  libibverbs-devel
 BuildRequires:  cmake
-Requires:       fio = 3.7-1.el7
-Requires:       qemu-kvm = 2.0.0-1.el7.6
-Requires:       rh-nodejs12
-Requires:       rh-nodejs12-npm
-Requires:       liburing >= 0.6
-Requires:       libJerasure2
-Requires:       lpsolve
+Requires:       vitastor-osd = %{version}-%{release}
+Requires:       vitastor-mon = %{version}-%{release}
+Requires:       vitastor-client = %{version}-%{release}
+Requires:       vitastor-client-devel = %{version}-%{release}
+Requires:       vitastor-fio = %{version}-%{release}
 
 %description
 Vitastor is a small, simple and fast clustered block storage (storage for VM drives),
@@ -31,13 +29,66 @@ 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 . -DQEMU_PLUGINDIR=qemu-kvm
+%cmake .
 %make_build
 
 
@@ -49,24 +100,42 @@ cd mon
 npm install
 cd ..
 mkdir -p %buildroot/usr/lib/vitastor
-cp -r mon %buildroot/usr/lib/vitastor/mon
+cp mon/make-osd.sh %buildroot/usr/lib/vitastor
+cp -r mon %buildroot/usr/lib/vitastor
 
 
 %files
-%doc
-%_bindir/vitastor-dump-journal
-%_bindir/vitastor-nbd
+%doc GPL-2.0.txt VNPL-1.1.txt README.md README-ru.md
+
+
+%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-rm
-%_libdir/qemu-kvm/block-vitastor.so
+%_bindir/vita
+%_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

rpm/vitastor-el8.Dockerfile

@@ -8,14 +8,11 @@ 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 --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
-RUN rm -rf /var/lib/dnf/*; dnf download --disablerepo='*' --enablerepo='vitastor' --source qemu-kvm
+RUN dnf -y install gcc-toolset-9 gcc-toolset-9-gcc-c++ gperftools-devel \
+    fio nodejs rpm-build jerasure-devel gf-complete-devel libibverbs-devel libarchive cmake
 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 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 libarchive
+RUN cd ~/rpmbuild/SPECS && dnf builddep -y --enablerepo=powertools --spec fio.spec
 
 ADD https://vitastor.io/rpms/liburing-el7/liburing-0.7-2.el7.src.rpm /root
 
@@ -29,14 +26,14 @@ 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-el7/liburing-*.x86_64.rpm | grep -v debug`
+RUN rpm -i `ls /root/packages/liburing-el8/liburing-*.x86_64.rpm | grep -v debug`
 
 ADD . /root/vitastor
 
 RUN set -e; \
     cd /root/vitastor/rpm; \
     sh build-tarball.sh; \
-    cp /root/vitastor-0.6.6.el8.tar.gz ~/rpmbuild/SOURCES; \
+    cp /root/vitastor-0.6.10.el8.tar.gz ~/rpmbuild/SOURCES; \
     cp vitastor-el8.spec ~/rpmbuild/SPECS/vitastor.spec; \
     cd ~/rpmbuild/SPECS/; \
     rpmbuild -ba vitastor.spec; \

rpm/vitastor-el8.spec

@@ -1,11 +1,11 @@
 Name:           vitastor
-Version:        0.6.6
+Version:        0.6.10
 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-0.6.6.el8.tar.gz
+Source0:        vitastor-0.6.10.el8.tar.gz
 
 BuildRequires:  liburing-devel >= 0.6
 BuildRequires:  gperftools-devel
@@ -15,12 +15,11 @@ BuildRequires:  jerasure-devel
 BuildRequires:  gf-complete-devel
 BuildRequires:  libibverbs-devel
 BuildRequires:  cmake
-Requires:       fio = 3.7-3.el8
-Requires:       qemu-kvm = 4.2.0-29.el8.6
-Requires:       nodejs >= 10
-Requires:       liburing >= 0.6
-Requires:       libJerasure2
-Requires:       lpsolve
+Requires:       vitastor-osd = %{version}-%{release}
+Requires:       vitastor-mon = %{version}-%{release}
+Requires:       vitastor-client = %{version}-%{release}
+Requires:       vitastor-client-devel = %{version}-%{release}
+Requires:       vitastor-fio = %{version}-%{release}
 
 %description
 Vitastor is a small, simple and fast clustered block storage (storage for VM drives),
@@ -29,13 +28,65 @@ 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 . -DQEMU_PLUGINDIR=qemu-kvm
+%cmake .
 %make_build
 
 
@@ -46,24 +97,42 @@ 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
-%_bindir/vitastor-dump-journal
-%_bindir/vitastor-nbd
+%doc GPL-2.0.txt VNPL-1.1.txt README.md README-ru.md
+
+
+%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-rm
-%_libdir/qemu-kvm/block-vitastor.so
+%_bindir/vita
+%_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

src/CMakeLists.txt

@@ -4,7 +4,7 @@ project(vitastor)
 
 include(GNUInstallDirs)
 
-set(WITH_QEMU true CACHE BOOL "Build QEMU driver")
+set(WITH_QEMU false CACHE BOOL "Build QEMU driver inside Vitastor source tree")
 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")
@@ -15,7 +15,7 @@ if("${CMAKE_INSTALL_PREFIX}" MATCHES "^/usr/local/?$")
 	set(CMAKE_INSTALL_RPATH "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_LIBDIR}")
 endif()
 
-add_definitions(-DVERSION="0.6.6")
+add_definitions(-DVERSION="0.6.10")
 add_definitions(-Wall -Wno-sign-compare -Wno-comment -Wno-parentheses -Wno-pointer-arith -fdiagnostics-color=always -I ${CMAKE_SOURCE_DIR}/src)
 if (${WITH_ASAN})
 	add_definitions(-fsanitize=address -fno-omit-frame-pointer)
@@ -37,7 +37,7 @@ string(REGEX REPLACE "([\\/\\-]D) *NDEBUG" "" CMAKE_C_FLAGS_MINSIZEREL "${CMAKE_
 string(REGEX REPLACE "([\\/\\-]D) *NDEBUG" "" CMAKE_C_FLAGS_RELWITHDEBINFO "${CMAKE_C_FLAGS_RELWITHDEBINFO}")
 
 macro(install_symlink filepath sympath)
-	install(CODE "execute_process(COMMAND ${CMAKE_COMMAND} -E create_symlink ${filepath} ${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)
 
@@ -153,11 +153,13 @@ target_link_libraries(vitastor-nbd
 
 # vitastor-cli
 add_executable(vitastor-cli
-	cli.cpp cli_flatten.cpp cli_merge.cpp cli_rm.cpp cli_snap_rm.cpp
+	cli.cpp cli_alloc_osd.cpp cli_simple_offsets.cpp cli_df.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
 	vitastor_client
 )
+configure_file(vitastor.pc.in vitastor.pc @ONLY)
 
 # vitastor-dump-journal
 add_executable(vitastor-dump-journal
@@ -169,6 +171,7 @@ 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
@@ -241,12 +244,14 @@ 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 ${CMAKE_INSTALL_BINDIR})
-install_symlink(${CMAKE_INSTALL_BINDIR}/vitastor-rm vitastor-cli)
+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})

src/blockstore.cpp

@@ -68,6 +68,11 @@ 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();

src/blockstore.h

@@ -194,5 +194,7 @@ public:
     uint64_t get_block_count();
     uint64_t get_free_block_count();
 
+    uint64_t get_journal_size();
+
     uint32_t get_bitmap_granularity();
 };

src/blockstore_flush.cpp

@@ -547,8 +547,9 @@ 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) while deleting %lx:%lx\n",
-                    clean_loc >> bs->block_order, new_entry->oid.inode, new_entry->oid.stripe, cur.oid.inode, cur.oid.stripe);
+                printf("Fatal error (metadata corruption or bug): tried to delete metadata entry %lu (%lx:%lx v%lu) while deleting %lx:%lx\n",
+                    clean_loc >> bs->block_order, new_entry->oid.inode, new_entry->oid.stripe,
+                    new_entry->version, cur.oid.inode, cur.oid.stripe);
                 exit(1);
             }
             // zero out new metadata entry
@@ -559,8 +560,9 @@ 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) with %lx:%lx\n",
-                    clean_loc >> bs->block_order, new_entry->oid.inode, new_entry->oid.stripe, cur.oid.inode, cur.oid.stripe);
+                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",
+                    clean_loc >> bs->block_order, new_entry->oid.inode, new_entry->oid.stripe, new_entry->version,
+                    cur.oid.inode, cur.oid.stripe, cur.version);
                 exit(1);
             }
             new_entry->oid = cur.oid;
@@ -743,12 +745,15 @@ 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 (1)
+                while (end_offset > offset)
                 {
                     for (; it != v.end(); it++)
-                        if (it->offset >= offset)
+                        if (it->offset+it->len > offset)
                             break;
-                    if (it == v.end() || it->offset > offset && it->len > 0)
+                    // If all items end before offset or if the found item starts after end_offset, just insert the buffer
+                    // 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;
@@ -772,7 +777,7 @@ bool journal_flusher_co::scan_dirty(int wait_base)
                         }
                     }
                     offset = it->offset+it->len;
-                    if (it == v.end() || offset >= end_offset)
+                    if (it == v.end())
                         break;
                 }
             }

src/blockstore_impl.h

@@ -251,6 +251,7 @@ 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;
 
@@ -368,4 +369,5 @@ public:
     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; }
 };

src/blockstore_open.cpp

@@ -295,9 +295,9 @@ void blockstore_impl_t::calc_lengths()
     }
 }
 
-void check_size(int fd, uint64_t *size, std::string name)
+static void check_size(int fd, uint64_t *size, uint64_t *sectsize, std::string name)
 {
-    int sectsize;
+    int sect;
     struct stat st;
     if (fstat(fd, &st) < 0)
     {
@@ -309,11 +309,14 @@ void check_size(int fd, uint64_t *size, std::string name)
     }
     else if (S_ISBLK(st.st_mode))
     {
-        if (ioctl(fd, BLKSSZGET, &sectsize) < 0 ||
-            ioctl(fd, BLKGETSIZE64, size) < 0 ||
-            sectsize != 512)
+        if (ioctl(fd, BLKGETSIZE64, size) < 0 ||
+            ioctl(fd, BLKSSZGET, &sect) < 0)
         {
-            throw std::runtime_error(name+" sector is not equal to 512 bytes");
+            throw std::runtime_error("failed to get "+name+" size or block size: "+strerror(errno));
+        }
+        if (sectsize)
+        {
+            *sectsize = sect;
         }
     }
     else
@@ -329,7 +332,14 @@ void blockstore_impl_t::open_data()
     {
         throw std::runtime_error("Failed to open data device");
     }
-    check_size(data_fd, &data_size, "data device");
+    check_size(data_fd, &data_size, &data_device_sect, "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));
@@ -350,7 +360,7 @@ void blockstore_impl_t::open_meta()
         {
             throw std::runtime_error("Failed to open metadata device");
         }
-        check_size(meta_fd, &meta_size, "metadata device");
+        check_size(meta_fd, &meta_size, &meta_device_sect, "metadata device");
         if (meta_offset >= meta_size)
         {
             throw std::runtime_error("meta_offset exceeds device size = "+std::to_string(meta_size));
@@ -363,12 +373,20 @@ 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()
@@ -380,7 +398,7 @@ void blockstore_impl_t::open_journal()
         {
             throw std::runtime_error("Failed to open journal device");
         }
-        check_size(journal.fd, &journal.device_size, "journal device");
+        check_size(journal.fd, &journal.device_size, &journal_device_sect, "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));
@@ -389,6 +407,7 @@ 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)
         {
@@ -406,4 +425,11 @@ 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)+")"
+        );
+    }
 }

src/blockstore_write.cpp

@@ -268,6 +268,16 @@ int blockstore_impl_t::dequeue_write(blockstore_op_t *op)
             cancel_all_writes(op, dirty_it, -ENOSPC);
             return 2;
         }
+#ifndef NDEBUG
+        // Double-check to not overwrite anything if easily possible
+        if (inmemory_meta)
+        {
+            uint64_t sector = (loc / (meta_block_size / clean_entry_size)) * meta_block_size;
+            uint64_t pos = (loc % (meta_block_size / clean_entry_size));
+            clean_disk_entry *meta_entry = (clean_disk_entry*)(metadata_buffer + sector + pos*clean_entry_size);
+            assert(!meta_entry->oid.inode);
+        }
+#endif
         write_iodepth++;
         BS_SUBMIT_GET_SQE(sqe, data);
         dirty_it->second.location = loc << block_order;

src/cli.cpp

@@ -28,10 +28,39 @@ json11::Json::object cli_tool_t::parse_args(int narg, const char *args[])
         {
             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] = !strcmp(opt, "json") || !strcmp(opt, "wait-list") || i == narg-1 ? "1" : args[++i];
+            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
         {
@@ -41,7 +70,7 @@ json11::Json::object cli_tool_t::parse_args(int narg, const char *args[])
     if (!cmd.size())
     {
         std::string exe(exe_name);
-        if (exe.substr(exe.size()-11) == "vitastor-rm")
+        if (exe.size() >= 11 && exe.substr(exe.size()-11) == "vitastor-rm")
         {
             cmd.push_back("rm-data");
         }
@@ -54,35 +83,80 @@ void cli_tool_t::help()
 {
     printf(
         "Vitastor command-line tool\n"
-        "(c) Vitaliy Filippov, 2019+ (VNPL-1.1)\n\n"
-        "USAGE:\n"
-        "%s rm-data [OPTIONS] --pool <pool> --inode <inode> [--wait-list]\n"
-        "  Remove inode data without changing metadata.\n"
-        "  --wait-list means first retrieve objects listings and then remove it.\n"
-        "  --wait-list requires more memory, but allows to show correct stats.\n"
+        "(c) Vitaliy Filippov, 2019+ (VNPL-1.1)\n"
         "\n"
-        "%s merge-data [OPTIONS] <from> <to> [--target <target>]\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 flatten [OPTIONS] <layer>\n"
-        "  Flatten a layer, i.e. merge data and detach it from parents\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"
-        "%s rm [OPTIONS] <from> [<to>] [--writers-stopped 1]\n"
-        "  Remove <from> or all layers between <from> and <to> (<to> must be a child of <from>),\n"
-        "  rebasing all their children accordingly. One of deleted parents may be renamed to one\n"
-        "  of children \"to be rebased\", but only if that child itself is readonly or if\n"
-        "  --writers-stopped 1 is specified\n"
-        "\n"
-        "OPTIONS (global):\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, exe_name, exe_name, exe_name, exe_name
     );
     exit(0);
 }
@@ -176,6 +250,26 @@ void cli_tool_t::run(json11::Json cfg)
         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
@@ -196,11 +290,23 @@ void cli_tool_t::run(json11::Json cfg)
         // 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);
     }
+    color = !cfg["no-color"].bool_value();
+    json_output = cfg["json"].bool_value();
     iodepth = cfg["iodepth"].uint64_value();
     if (!iodepth)
         iodepth = 32;
@@ -236,7 +342,8 @@ void cli_tool_t::run(json11::Json cfg)
     while (action_cb != NULL)
     {
         ringloop->loop();
-        ringloop->wait();
+        if (action_cb != NULL)
+            ringloop->wait();
     }
 }
 

src/cli.h

@@ -25,8 +25,9 @@ public:
     uint64_t iodepth = 0, parallel_osds = 0;
     bool progress = true;
     bool list_first = false;
+    bool json_output = false;
     int log_level = 0;
-    int mode = 0;
+    bool color = false;
 
     ring_loop_t *ringloop = NULL;
     epoll_manager_t *epmgr = NULL;
@@ -49,8 +50,26 @@ public:
     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);

src/cli_alloc_osd.cpp

@@ -0,0 +1,141 @@
+// 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;
+    };
+}

src/cli_create.cpp

@@ -0,0 +1,553 @@
+// 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;
+    };
+}

src/cli_df.cpp

@@ -0,0 +1,229 @@
+// 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;
+    };
+}

src/cli_ls.cpp

@@ -0,0 +1,582 @@
+// 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;
+    };
+}

src/cli_modify.cpp

@@ -0,0 +1,236 @@
+// 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;
+    };
+}

src/cli_rm.cpp

@@ -14,7 +14,7 @@ struct rm_pg_t
     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, obj_prev_done = 0;
+    uint64_t obj_count = 0, obj_done = 0;
     int state = 0;
     int in_flight = 0;
 };
@@ -23,6 +23,7 @@ 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;
@@ -43,8 +44,21 @@ struct rm_inode_t
                 .objects = objects,
                 .obj_count = objects.size(),
                 .obj_done = 0,
-                .obj_prev_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)
@@ -78,38 +92,41 @@ struct rm_inode_t
         }
         while (cur_list->in_flight < parent->iodepth && cur_list->obj_pos != cur_list->objects.end())
         {
-            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)
+            if (cur_list->obj_pos->stripe >= min_offset)
             {
-                cur_list->in_flight--;
-                if (op->reply.hdr.retval < 0)
+                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)
                 {
-                    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--;
+                    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++;
-            cur_list->in_flight++;
-            parent->cli->msgr.outbox_push(op);
         }
     }
 
@@ -183,6 +200,7 @@ std::function<bool(void)> cli_tool_t::start_rm(json11::Json cfg)
         fprintf(stderr, "pool is missing\n");
         exit(1);
     }
+    remover->min_offset = cfg["min-offset"].uint64_value();
     return [remover]()
     {
         if (remover->loop())

src/cli_simple_offsets.cpp

@@ -0,0 +1,143 @@
+// Copyright (c) Vitaliy Filippov, 2019+
+// License: VNPL-1.1 (see README.md for details)
+
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <ctype.h>
+#include <unistd.h>
+#include "cli.h"
+#include "cluster_client.h"
+#include "base64.h"
+
+// Calculate offsets for a block device and print OSD command line parameters
+std::function<bool(void)> cli_tool_t::simple_offsets(json11::Json cfg)
+{
+    std::string device = cfg["command"][1].string_value();
+    uint64_t object_size = parse_size(cfg["object_size"].string_value());
+    uint64_t bitmap_granularity = parse_size(cfg["bitmap_granularity"].string_value());
+    uint64_t journal_size = parse_size(cfg["journal_size"].string_value());
+    uint64_t device_block_size = parse_size(cfg["device_block_size"].string_value());
+    uint64_t journal_offset = parse_size(cfg["journal_offset"].string_value());
+    uint64_t device_size = parse_size(cfg["device_size"].string_value());
+    std::string format = cfg["format"].string_value();
+    if (json_output)
+        format = "json";
+    if (!object_size)
+        object_size = DEFAULT_BLOCK_SIZE;
+    if (!bitmap_granularity)
+        bitmap_granularity = DEFAULT_BITMAP_GRANULARITY;
+    if (!journal_size)
+        journal_size = 16*1024*1024;
+    if (!device_block_size)
+        device_block_size = 4096;
+    uint64_t orig_device_size = device_size;
+    if (!device_size)
+    {
+        struct stat st;
+        if (stat(device.c_str(), &st) < 0)
+        {
+            fprintf(stderr, "Can't stat %s: %s\n", device.c_str(), strerror(errno));
+            exit(1);
+        }
+        if (S_ISBLK(st.st_mode))
+        {
+            int fd = open(device.c_str(), O_DIRECT|O_RDONLY);
+            if (fd < 0 || ioctl(fd, BLKGETSIZE64, &device_size) < 0)
+            {
+                fprintf(stderr, "Failed to get device size for %s: %s\n", device.c_str(), strerror(errno));
+                exit(1);
+            }
+            close(fd);
+            if (st.st_blksize < device_block_size)
+            {
+                fprintf(
+                    stderr, "Warning: %s reports %lu byte blocks, but we use %lu."
+                    " Set --device_block_size=%lu if you're sure it works well with %lu byte blocks.\n",
+                    device.c_str(), st.st_blksize, device_block_size, st.st_blksize, st.st_blksize
+                );
+            }
+        }
+        else if (S_ISREG(st.st_mode))
+        {
+            device_size = st.st_size;
+        }
+        else
+        {
+            fprintf(stderr, "%s is neither a block device nor a regular file\n", device.c_str());
+            exit(1);
+        }
+    }
+    if (!device_size)
+    {
+        fprintf(stderr, "Failed to get device size for %s\n", device.c_str());
+        exit(1);
+    }
+    if (device_block_size < 512 || device_block_size > 1048576 ||
+        device_block_size & (device_block_size-1) != 0)
+    {
+        fprintf(stderr, "Invalid device block size specified: %lu\n", device_block_size);
+        exit(1);
+    }
+    if (object_size < device_block_size || object_size > MAX_BLOCK_SIZE ||
+        object_size & (object_size-1) != 0)
+    {
+        fprintf(stderr, "Invalid object size specified: %lu\n", object_size);
+        exit(1);
+    }
+    if (bitmap_granularity < device_block_size || bitmap_granularity > object_size ||
+        bitmap_granularity & (bitmap_granularity-1) != 0)
+    {
+        fprintf(stderr, "Invalid bitmap granularity specified: %lu\n", bitmap_granularity);
+        exit(1);
+    }
+    journal_offset = ((journal_offset+device_block_size-1)/device_block_size)*device_block_size;
+    uint64_t meta_offset = journal_offset + ((journal_size+device_block_size-1)/device_block_size)*device_block_size;
+    uint64_t entries_per_block = (device_block_size / (24 + 2*object_size/bitmap_granularity/8));
+    uint64_t object_count = ((device_size-meta_offset)/object_size);
+    uint64_t meta_size = (1 + (object_count+entries_per_block-1)/entries_per_block) * device_block_size;
+    uint64_t data_offset = meta_offset + meta_size;
+    if (format == "json")
+    {
+        // JSON
+        printf("%s\n", json11::Json(json11::Json::object {
+            { "meta_block_size", device_block_size },
+            { "journal_block_size", device_block_size },
+            { "data_size", device_size-data_offset },
+            { "data_device", device },
+            { "journal_offset", journal_offset },
+            { "meta_offset", meta_offset },
+            { "data_offset", data_offset },
+        }).dump().c_str());
+    }
+    else if (format == "env")
+    {
+        // Env
+        printf(
+            "meta_block_size=%lu\njournal_block_size=%lu\ndata_size=%lu\n"
+            "data_device=%s\njournal_offset=%lu\nmeta_offset=%lu\ndata_offset=%lu\n",
+            device_block_size, device_block_size, device_size-data_offset,
+            device.c_str(), journal_offset, meta_offset, data_offset
+        );
+    }
+    else
+    {
+        // OSD command-line options
+        if (format != "options")
+        {
+            fprintf(stderr, "Metadata size: %s\nOptions for the OSD:\n", format_size(meta_size).c_str());
+        }
+        if (device_block_size != 4096)
+        {
+            printf("--meta_block_size %lu\n--journal_block_size %lu\n", device_block_size, device_block_size);
+        }
+        if (orig_device_size)
+        {
+            printf("--data_size %lu\n", device_size-data_offset);
+        }
+        printf(
+            "--data_device %s\n--journal_offset %lu\n--meta_offset %lu\n--data_offset %lu\n",
+            device.c_str(), journal_offset, meta_offset, data_offset
+        );
+    }
+    return NULL;
+}

src/cli_snap_rm.cpp

@@ -1,6 +1,7 @@
 // Copyright (c) Vitaliy Filippov, 2019+
 // License: VNPL-1.1 (see README.md for details)
 
+#include <fcntl.h>
 #include "cli.h"
 #include "cluster_client.h"
 #include "base64.h"
@@ -467,6 +468,8 @@ resume_9:
                     { "request_delete_range", json11::Json::object {
                         { "key", cur_cfg_key },
                     } },
+                },
+                json11::Json::object {
                     { "request_delete_range", json11::Json::object {
                         { "key", base64_encode(parent->cli->st_cli.etcd_prefix+"/index/image/"+cur_name) },
                     } },

src/cluster_client.cpp

@@ -64,6 +64,7 @@ cluster_client_t::cluster_client_t(ring_loop_t *ringloop, timerfd_manager_t *tfd
     st_cli.on_change_osd_state_hook = [this](uint64_t peer_osd) { on_change_osd_state_hook(peer_osd); };
     st_cli.on_change_hook = [this](std::map<std::string, etcd_kv_t> & changes) { on_change_hook(changes); };
     st_cli.on_load_pgs_hook = [this](bool success) { on_load_pgs_hook(success); };
+    st_cli.on_reload_hook = [this]() { st_cli.load_global_config(); };
 
     st_cli.parse_config(config);
     st_cli.load_global_config();

src/etcd_state_client.cpp

@@ -17,6 +17,11 @@ etcd_state_client_t::~etcd_state_client_t()
     }
     watches.clear();
     etcd_watches_initialised = -1;
+    if (ws_keepalive_timer >= 0)
+    {
+        tfd->clear_timer(ws_keepalive_timer);
+        ws_keepalive_timer = -1;
+    }
 #ifndef __MOCK__
     if (etcd_watch_ws)
     {
@@ -50,12 +55,13 @@ void etcd_state_client_t::etcd_txn(json11::Json txn, int timeout, std::function<
 
 void etcd_state_client_t::etcd_call(std::string api, json11::Json payload, int timeout, std::function<void(std::string, json11::Json)> callback)
 {
-    if (!etcd_addresses.size())
+    if (!etcd_addresses.size() && !etcd_local.size())
     {
         fprintf(stderr, "etcd_address is missing in Vitastor configuration\n");
         exit(1);
     }
-    std::string etcd_address = etcd_addresses[rand() % etcd_addresses.size()];
+    pick_next_etcd();
+    std::string etcd_address = selected_etcd_address;
     std::string etcd_api_path;
     int pos = etcd_address.find('/');
     if (pos >= 0)
@@ -70,7 +76,12 @@ void etcd_state_client_t::etcd_call(std::string api, json11::Json payload, int t
         "Content-Length: "+std::to_string(req.size())+"\r\n"
         "Connection: close\r\n"
         "\r\n"+req;
-    http_request_json(tfd, etcd_address, req, timeout, callback);
+    http_request_json(tfd, etcd_address, req, timeout, [this, cur_addr = selected_etcd_address, callback](std::string err, json11::Json data)
+    {
+        if (err != "" && cur_addr == selected_etcd_address)
+            selected_etcd_address = "";
+        callback(err, data);
+    });
 }
 
 void etcd_state_client_t::add_etcd_url(std::string addr)
@@ -84,9 +95,30 @@ void etcd_state_client_t::add_etcd_url(std::string addr)
             fprintf(stderr, "HTTPS is unsupported for etcd. Either use plain HTTP or setup a local proxy for etcd interaction\n");
             exit(1);
         }
-        if (addr.find('/') == std::string::npos)
+        if (!local_ips.size())
+            local_ips = getifaddr_list();
+        std::string check_addr;
+        int pos = addr.find('/');
+        int pos2 = addr.find(':');
+        if (pos2 >= 0)
+            check_addr = addr.substr(0, pos2);
+        else if (pos >= 0)
+            check_addr = addr.substr(0, pos);
+        else
+            check_addr = addr;
+        if (pos == std::string::npos)
             addr += "/v3";
-        this->etcd_addresses.push_back(addr);
+        int i;
+        for (i = 0; i < local_ips.size(); i++)
+        {
+            if (local_ips[i] == check_addr)
+            {
+                this->etcd_local.push_back(addr);
+                break;
+            }
+        }
+        if (i >= local_ips.size())
+            this->etcd_addresses.push_back(addr);
     }
 }
 
@@ -125,14 +157,38 @@ void etcd_state_client_t::parse_config(const json11::Json & config)
     this->log_level = config["log_level"].int64_value();
 }
 
+void etcd_state_client_t::pick_next_etcd()
+{
+    if (selected_etcd_address != "")
+        return;
+    if (addresses_to_try.size() == 0)
+    {
+        // Prefer local etcd, if any
+        for (int i = 0; i < etcd_local.size(); i++)
+            addresses_to_try.push_back(etcd_local[i]);
+        std::vector<int> ns;
+        for (int i = 0; i < etcd_addresses.size(); i++)
+            ns.push_back(i);
+        while (ns.size())
+        {
+            int i = rand() % ns.size();
+            addresses_to_try.push_back(etcd_addresses[ns[i]]);
+            ns.erase(ns.begin()+i, ns.begin()+i+1);
+        }
+    }
+    selected_etcd_address = addresses_to_try[0];
+    addresses_to_try.erase(addresses_to_try.begin(), addresses_to_try.begin()+1);
+}
+
 void etcd_state_client_t::start_etcd_watcher()
 {
-    if (!etcd_addresses.size())
+    if (!etcd_addresses.size() && !etcd_local.size())
     {
         fprintf(stderr, "etcd_address is missing in Vitastor configuration\n");
         exit(1);
     }
-    std::string etcd_address = etcd_addresses[rand() % etcd_addresses.size()];
+    pick_next_etcd();
+    std::string etcd_address = selected_etcd_address;
     std::string etcd_api_path;
     int pos = etcd_address.find('/');
     if (pos >= 0)
@@ -141,10 +197,18 @@ void etcd_state_client_t::start_etcd_watcher()
         etcd_address = etcd_address.substr(0, pos);
     }
     etcd_watches_initialised = 0;
-    etcd_watch_ws = open_websocket(tfd, etcd_address, etcd_api_path+"/watch", ETCD_SLOW_TIMEOUT, [this](const http_response_t *msg)
+    ws_alive = 1;
+    if (etcd_watch_ws)
+    {
+        etcd_watch_ws->close();
+        etcd_watch_ws = NULL;
+    }
+    etcd_watch_ws = open_websocket(tfd, etcd_address, etcd_api_path+"/watch", ETCD_SLOW_TIMEOUT,
+        [this, cur_addr = selected_etcd_address](const http_response_t *msg)
     {
         if (msg->body.length())
         {
+            ws_alive = 1;
             std::string json_err;
             json11::Json data = json11::Json::parse(msg->body, json_err);
             if (json_err != "")
@@ -157,9 +221,39 @@ void etcd_state_client_t::start_etcd_watcher()
                 {
                     etcd_watches_initialised++;
                 }
+                if (data["result"]["canceled"].bool_value())
+                {
+                    // etcd watch canceled, maybe because the revision was compacted
+                    if (data["result"]["compact_revision"].uint64_value())
+                    {
+                        // we may miss events if we proceed
+                        // so we should restart from the beginning if we can
+                        if (on_reload_hook != NULL)
+                        {
+                            fprintf(stderr, "Revisions before %lu were compacted by etcd, reloading state\n",
+                                data["result"]["compact_revision"].uint64_value());
+                            etcd_watch_ws->close();
+                            etcd_watch_ws = NULL;
+                            etcd_watch_revision = 0;
+                            on_reload_hook();
+                        }
+                        else
+                        {
+                            fprintf(stderr, "Revisions before %lu were compacted by etcd, exiting\n",
+                                data["result"]["compact_revision"].uint64_value());
+                            exit(1);
+                        }
+                    }
+                    else
+                    {
+                        fprintf(stderr, "Watch canceled by etcd, reason: %s, exiting\n", data["result"]["cancel_reason"].string_value().c_str());
+                        exit(1);
+                    }
+                }
                 if (etcd_watches_initialised == 4)
                 {
-                    etcd_watch_revision = data["result"]["header"]["revision"].uint64_value();
+                    etcd_watch_revision = data["result"]["header"]["revision"].uint64_value()+1;
+                    addresses_to_try.clear();
                 }
                 // First gather all changes into a hash to remove multiple overwrites
                 std::map<std::string, etcd_kv_t> changes;
@@ -188,11 +282,15 @@ void etcd_state_client_t::start_etcd_watcher()
         }
         if (msg->eof)
         {
+            if (cur_addr == selected_etcd_address)
+            {
+                selected_etcd_address = "";
+            }
             etcd_watch_ws = NULL;
             if (etcd_watches_initialised == 0)
             {
-                // Connection not established, retry in <ETCD_SLOW_TIMEOUT>
-                tfd->set_timer(ETCD_SLOW_TIMEOUT, false, [this](int)
+                // Connection not established, retry in <ETCD_QUICK_TIMEOUT>
+                tfd->set_timer(ETCD_QUICK_TIMEOUT, false, [this](int)
                 {
                     start_etcd_watcher();
                 });
@@ -208,7 +306,7 @@ void etcd_state_client_t::start_etcd_watcher()
         { "create_request", json11::Json::object {
             { "key", base64_encode(etcd_prefix+"/config/") },
             { "range_end", base64_encode(etcd_prefix+"/config0") },
-            { "start_revision", etcd_watch_revision+1 },
+            { "start_revision", etcd_watch_revision },
             { "watch_id", ETCD_CONFIG_WATCH_ID },
             { "progress_notify", true },
         } }
@@ -217,7 +315,7 @@ void etcd_state_client_t::start_etcd_watcher()
         { "create_request", json11::Json::object {
             { "key", base64_encode(etcd_prefix+"/osd/state/") },
             { "range_end", base64_encode(etcd_prefix+"/osd/state0") },
-            { "start_revision", etcd_watch_revision+1 },
+            { "start_revision", etcd_watch_revision },
             { "watch_id", ETCD_OSD_STATE_WATCH_ID },
             { "progress_notify", true },
         } }
@@ -226,7 +324,7 @@ void etcd_state_client_t::start_etcd_watcher()
         { "create_request", json11::Json::object {
             { "key", base64_encode(etcd_prefix+"/pg/state/") },
             { "range_end", base64_encode(etcd_prefix+"/pg/state0") },
-            { "start_revision", etcd_watch_revision+1 },
+            { "start_revision", etcd_watch_revision },
             { "watch_id", ETCD_PG_STATE_WATCH_ID },
             { "progress_notify", true },
         } }
@@ -235,11 +333,34 @@ void etcd_state_client_t::start_etcd_watcher()
         { "create_request", json11::Json::object {
             { "key", base64_encode(etcd_prefix+"/pg/history/") },
             { "range_end", base64_encode(etcd_prefix+"/pg/history0") },
-            { "start_revision", etcd_watch_revision+1 },
+            { "start_revision", etcd_watch_revision },
             { "watch_id", ETCD_PG_HISTORY_WATCH_ID },
             { "progress_notify", true },
         } }
     }).dump());
+    if (ws_keepalive_timer < 0)
+    {
+        ws_keepalive_timer = tfd->set_timer(ETCD_KEEPALIVE_TIMEOUT, true, [this](int)
+        {
+            if (!etcd_watch_ws)
+            {
+                // Do nothing
+            }
+            else if (!ws_alive)
+            {
+                etcd_watch_ws->close();
+                etcd_watch_ws = NULL;
+                start_etcd_watcher();
+            }
+            else
+            {
+                ws_alive = 0;
+                etcd_watch_ws->post_message(WS_TEXT, json11::Json(json11::Json::object {
+                    { "progress_request", json11::Json::object { } }
+                }).dump());
+            }
+        });
+    }
 }
 
 void etcd_state_client_t::load_global_config()
@@ -337,7 +458,7 @@ void etcd_state_client_t::load_pgs()
         }
         if (!etcd_watch_revision)
         {
-            etcd_watch_revision = data["header"]["revision"].uint64_value();
+            etcd_watch_revision = data["header"]["revision"].uint64_value()+1;
         }
         for (auto & res: data["responses"].array_items())
         {
@@ -766,7 +887,7 @@ void etcd_state_client_t::close_watch(inode_watch_t* watch)
     delete watch;
 }
 
-json11::Json::object & etcd_state_client_t::serialize_inode_cfg(inode_config_t *cfg)
+json11::Json::object etcd_state_client_t::serialize_inode_cfg(inode_config_t *cfg)
 {
     json11::Json::object new_cfg = json11::Json::object {
         { "name", cfg->name },
@@ -784,3 +905,8 @@ json11::Json::object & etcd_state_client_t::serialize_inode_cfg(inode_config_t *
     }
     return new_cfg;
 }
+
+int etcd_state_client_t::address_count()
+{
+    return etcd_addresses.size() + etcd_local.size();
+}

src/etcd_state_client.h

@@ -15,6 +15,7 @@
 #define MAX_ETCD_ATTEMPTS 5
 #define ETCD_SLOW_TIMEOUT 5000
 #define ETCD_QUICK_TIMEOUT 1000
+#define ETCD_KEEPALIVE_TIMEOUT 30000
 
 #define DEFAULT_BLOCK_SIZE 128*1024
 
@@ -75,12 +76,19 @@ struct websocket_t;
 struct etcd_state_client_t
 {
 protected:
+    std::vector<std::string> local_ips;
+    std::vector<std::string> etcd_addresses;
+    std::vector<std::string> etcd_local;
+    std::string selected_etcd_address;
+    std::vector<std::string> addresses_to_try;
     std::vector<inode_watch_t*> watches;
     websocket_t *etcd_watch_ws = NULL;
+    int ws_keepalive_timer = -1;
+    int ws_alive = 0;
     uint64_t bs_block_size = DEFAULT_BLOCK_SIZE;
     void add_etcd_url(std::string);
+    void pick_next_etcd();
 public:
-    std::vector<std::string> etcd_addresses;
     std::string etcd_prefix;
     int log_level = 0;
     timerfd_manager_t *tfd = NULL;
@@ -98,8 +106,9 @@ public:
     std::function<void(bool)> on_load_pgs_hook;
     std::function<void(pool_id_t, pg_num_t)> on_change_pg_history_hook;
     std::function<void(osd_num_t)> on_change_osd_state_hook;
+    std::function<void()> on_reload_hook;
 
-    json11::Json::object & serialize_inode_cfg(inode_config_t *cfg);
+    json11::Json::object serialize_inode_cfg(inode_config_t *cfg);
     etcd_kv_t parse_etcd_kv(const json11::Json & kv_json);
     void etcd_call(std::string api, json11::Json payload, int timeout, std::function<void(std::string, json11::Json)> callback);
     void etcd_txn(json11::Json txn, int timeout, std::function<void(std::string, json11::Json)> callback);
@@ -110,5 +119,6 @@ public:
     void parse_config(const json11::Json & config);
     inode_watch_t* watch_inode(std::string name);
     void close_watch(inode_watch_t* watch);
+    int address_count();
     ~etcd_state_client_t();
 };

src/http_client.cpp

@@ -451,7 +451,11 @@ bool http_co_t::handle_read()
         }
         if (want_streaming && parsed.body.size() > 0)
         {
-            callback(&parsed);
+            if (!ended)
+            {
+                // Don't deliver additional events after close()
+                callback(&parsed);
+            }
             parsed.body = "";
         }
     }
@@ -459,7 +463,11 @@ bool http_co_t::handle_read()
     {
         while (ws_parse_frame(response, parsed.ws_msg_type, parsed.body))
         {
-            callback(&parsed);
+            if (!ended)
+            {
+                // Don't deliver additional events after close()
+                callback(&parsed);
+            }
             parsed.body = "";
         }
     }
@@ -621,8 +629,82 @@ static bool ws_parse_frame(std::string & buf, int & type, std::string & res)
     return true;
 }
 
-std::vector<std::string> getifaddr_list(bool include_v6)
+static bool cidr_match(const in_addr &addr, const in_addr &net, uint8_t bits)
 {
+    if (bits == 0)
+    {
+        // C99 6.5.7 (3): u32 << 32 is undefined behaviour
+        return true;
+    }
+    return !((addr.s_addr ^ net.s_addr) & htonl(0xFFFFFFFFu << (32 - bits)));
+}
+
+static bool cidr6_match(const in6_addr &address, const in6_addr &network, uint8_t bits)
+{
+    const uint32_t *a = address.s6_addr32;
+    const uint32_t *n = network.s6_addr32;
+    int bits_whole, bits_incomplete;
+    bits_whole = bits >> 5;         // number of whole u32
+    bits_incomplete = bits & 0x1F;  // number of bits in incomplete u32
+    if (bits_whole && memcmp(a, n, bits_whole << 2))
+        return false;
+    if (bits_incomplete)
+    {
+        uint32_t mask = htonl((0xFFFFFFFFu) << (32 - bits_incomplete));
+        if ((a[bits_whole] ^ n[bits_whole]) & mask)
+            return false;
+    }
+    return true;
+}
+
+struct addr_mask_t
+{
+    sa_family_t family;
+    in_addr ipv4;
+    in6_addr ipv6;
+    uint8_t bits;
+};
+
+std::vector<std::string> getifaddr_list(json11::Json mask_cfg, bool include_v6)
+{
+    std::vector<addr_mask_t> masks;
+    if (mask_cfg.is_string())
+    {
+        mask_cfg = json11::Json::array{ mask_cfg };
+    }
+    for (auto mask_json: mask_cfg.array_items())
+    {
+        std::string mask = mask_json.string_value();
+        unsigned bits = 0;
+        int p = mask.find('/');
+        if (p != std::string::npos)
+        {
+            char null_byte = 0;
+            if (sscanf(mask.c_str()+p+1, "%u%c", &bits, &null_byte) != 1 || bits > 128)
+            {
+                throw std::runtime_error((include_v6 ? "Invalid IPv4 address mask: " : "Invalid IP address mask: ") + mask);
+            }
+            mask = mask.substr(0, p);
+        }
+        in_addr ipv4;
+        in6_addr ipv6;
+        if (inet_pton(AF_INET, mask.c_str(), &ipv4) == 1)
+        {
+            if (bits > 32)
+            {
+                throw std::runtime_error((include_v6 ? "Invalid IPv4 address mask: " : "Invalid IP address mask: ") + mask);
+            }
+            masks.push_back((addr_mask_t){ .family = AF_INET, .ipv4 = ipv4, .bits = (uint8_t)bits });
+        }
+        else if (include_v6 && inet_pton(AF_INET6, mask.c_str(), &ipv6) == 1)
+        {
+            masks.push_back((addr_mask_t){ .family = AF_INET6, .ipv6 = ipv6, .bits = (uint8_t)bits });
+        }
+        else
+        {
+            throw std::runtime_error((include_v6 ? "Invalid IPv4 address mask: " : "Invalid IP address mask: ") + mask);
+        }
+    }
     std::vector<std::string> addresses;
     ifaddrs *list, *ifa;
     if (getifaddrs(&list) == -1)
@@ -641,9 +723,30 @@ std::vector<std::string> getifaddr_list(bool include_v6)
         {
             void *addr_ptr;
             if (family == AF_INET)
+            {
                 addr_ptr = &((sockaddr_in *)ifa->ifa_addr)->sin_addr;
+            }
             else
+            {
                 addr_ptr = &((sockaddr_in6 *)ifa->ifa_addr)->sin6_addr;
+            }
+            if (masks.size() > 0)
+            {
+                int i;
+                for (i = 0; i < masks.size(); i++)
+                {
+                    if (masks[i].family == family && (family == AF_INET
+                        ? cidr_match(*(in_addr*)addr_ptr, masks[i].ipv4, masks[i].bits)
+                        : cidr6_match(*(in6_addr*)addr_ptr, masks[i].ipv6, masks[i].bits)))
+                    {
+                        break;
+                    }
+                }
+                if (i >= masks.size())
+                {
+                    continue;
+                }
+            }
             char addr[INET6_ADDRSTRLEN];
             if (!inet_ntop(family, addr_ptr, addr, INET6_ADDRSTRLEN))
             {

src/http_client.h

@@ -45,7 +45,7 @@ struct websocket_t
 
 void parse_http_headers(std::string & res, http_response_t *parsed);
 
-std::vector<std::string> getifaddr_list(bool include_v6 = false);
+std::vector<std::string> getifaddr_list(json11::Json mask_cfg = json11::Json(), bool include_v6 = false);
 
 uint64_t stoull_full(const std::string & str, int base = 10);
 

src/messenger.cpp

@@ -17,11 +17,12 @@ void osd_messenger_t::init()
     {
         rdma_context = msgr_rdma_context_t::create(
             rdma_device != "" ? rdma_device.c_str() : NULL,
-            rdma_port_num, rdma_gid_index, rdma_mtu
+            rdma_port_num, rdma_gid_index, rdma_mtu, log_level
         );
         if (!rdma_context)
         {
-            fprintf(stderr, "[OSD %lu] Couldn't initialize RDMA, proceeding with TCP only\n", osd_num);
+            if (log_level > 0)
+                fprintf(stderr, "[OSD %lu] Couldn't initialize RDMA, proceeding with TCP only\n", osd_num);
         }
         else
         {
@@ -146,13 +147,13 @@ void osd_messenger_t::parse_config(const json11::Json & config)
         this->rdma_max_sge = 128;
     this->rdma_max_send = config["rdma_max_send"].uint64_value();
     if (!this->rdma_max_send)
-        this->rdma_max_send = 32;
+        this->rdma_max_send = 1;
     this->rdma_max_recv = config["rdma_max_recv"].uint64_value();
     if (!this->rdma_max_recv)
-        this->rdma_max_recv = 8;
+        this->rdma_max_recv = 128;
     this->rdma_max_msg = config["rdma_max_msg"].uint64_value();
     if (!this->rdma_max_msg || this->rdma_max_msg > 128*1024*1024)
-        this->rdma_max_msg = 1024*1024;
+        this->rdma_max_msg = 129*1024;
 #endif
     this->receive_buffer_size = (uint32_t)config["tcp_header_buffer_size"].uint64_value();
     if (!this->receive_buffer_size || this->receive_buffer_size > 1024*1024*1024)

src/messenger.h

@@ -133,7 +133,7 @@ protected:
     std::string rdma_device;
     uint64_t rdma_port_num = 1, rdma_gid_index = 0, rdma_mtu = 0;
     msgr_rdma_context_t *rdma_context = NULL;
-    uint64_t rdma_max_sge = 0, rdma_max_send = 0, rdma_max_recv = 8;
+    uint64_t rdma_max_sge = 0, rdma_max_send = 0, rdma_max_recv = 0;
     uint64_t rdma_max_msg = 0;
 #endif
 

src/msgr_rdma.cpp

@@ -51,7 +51,7 @@ msgr_rdma_connection_t::~msgr_rdma_connection_t()
             free(b);
 }
 
-msgr_rdma_context_t *msgr_rdma_context_t::create(const char *ib_devname, uint8_t ib_port, uint8_t gid_index, uint32_t mtu)
+msgr_rdma_context_t *msgr_rdma_context_t::create(const char *ib_devname, uint8_t ib_port, uint8_t gid_index, uint32_t mtu, int log_level)
 {
     int res;
     ibv_device **dev_list = NULL;
@@ -62,7 +62,13 @@ msgr_rdma_context_t *msgr_rdma_context_t::create(const char *ib_devname, uint8_t
     dev_list = ibv_get_device_list(NULL);
     if (!dev_list)
     {
-        fprintf(stderr, "Failed to get RDMA device list: %s\n", strerror(errno));
+        if (errno == -ENOSYS || errno == ENOSYS)
+        {
+            if (log_level > 0)
+                fprintf(stderr, "No RDMA devices found (RDMA device list returned ENOSYS)\n");
+        }
+        else
+            fprintf(stderr, "Failed to get RDMA device list: %s\n", strerror(errno));
         goto cleanup;
     }
     if (!ib_devname)
@@ -70,7 +76,8 @@ msgr_rdma_context_t *msgr_rdma_context_t::create(const char *ib_devname, uint8_t
         ctx->dev = *dev_list;
         if (!ctx->dev)
         {
-            fprintf(stderr, "No RDMA devices found\n");
+            if (log_level > 0)
+                fprintf(stderr, "No RDMA devices found\n");
             goto cleanup;
         }
     }

src/msgr_rdma.h

@@ -35,7 +35,7 @@ struct msgr_rdma_context_t
     int max_cqe = 0;
     int used_max_cqe = 0;
 
-    static msgr_rdma_context_t *create(const char *ib_devname, uint8_t ib_port, uint8_t gid_index, uint32_t mtu);
+    static msgr_rdma_context_t *create(const char *ib_devname, uint8_t ib_port, uint8_t gid_index, uint32_t mtu, int log_level);
     ~msgr_rdma_context_t();
 };
 

src/nbd_proxy.cpp

@@ -100,7 +100,7 @@ public:
             }
             unmap(cfg["dev_num"].uint64_value());
         }
-        else if (cfg["command"] == "list" || cfg["command"] == "list-mapped")
+        else if (cfg["command"] == "ls" || cfg["command"] == "list" || cfg["command"] == "list-mapped")
         {
             auto mapped = list_mapped();
             print_mapped(mapped, !cfg["json"].is_null());
@@ -119,7 +119,7 @@ public:
             "USAGE:\n"
             "  %s map [--etcd_address <etcd_address>] (--image <image> | --pool <pool> --inode <inode> --size <size in bytes>)\n"
             "  %s unmap /dev/nbd0\n"
-            "  %s list [--json]\n",
+            "  %s ls [--json]\n",
             exe_name, exe_name, exe_name
         );
         exit(0);
@@ -402,7 +402,7 @@ public:
                 printf("%s\n", dev.first.c_str());
                 for (auto & k: dev.second.object_items())
                 {
-                    printf("%s: %s\n", k.first.c_str(), k.second.string_value().c_str());
+                    printf("%s: %s\n", k.first.c_str(), k.second.as_string().c_str());
                 }
                 printf("\n");
             }

src/osd.cpp

@@ -45,6 +45,12 @@ osd_t::osd_t(const json11::Json & config, ring_loop_t *ringloop)
     // FIXME: Create Blockstore from on-disk superblock config and check it against the OSD cluster config
     auto bs_cfg = json_to_bs(this->config);
     this->bs = new blockstore_t(bs_cfg, ringloop, tfd);
+    {
+        // Autosync based on the number of unstable writes to prevent stalls due to insufficient journal space
+        uint64_t max_autosync = bs->get_journal_size() / bs->get_block_size() / 2;
+        if (autosync_writes > max_autosync)
+            autosync_writes = max_autosync;
+    }
 
     this->tfd->set_timer(print_stats_interval*1000, true, [this](int timer_id)
     {
@@ -104,7 +110,7 @@ void osd_t::parse_config(const json11::Json & config)
     log_level = config["log_level"].uint64_value();
     etcd_report_interval = config["etcd_report_interval"].uint64_value();
     if (etcd_report_interval <= 0)
-        etcd_report_interval = 30;
+        etcd_report_interval = 5;
     readonly = config["readonly"] == "true" || config["readonly"] == "1" || config["readonly"] == "yes";
     run_primary = config["run_primary"] != "false" && config["run_primary"] != "0" && config["run_primary"] != "no";
     no_rebalance = config["no_rebalance"] == "true" || config["no_rebalance"] == "1" || config["no_rebalance"] == "yes";
@@ -123,6 +129,11 @@ void osd_t::parse_config(const json11::Json & config)
         if (autosync_interval > MAX_AUTOSYNC_INTERVAL)
             autosync_interval = DEFAULT_AUTOSYNC_INTERVAL;
     }
+    if (!config["autosync_writes"].is_null())
+    {
+        // Allow to set it to 0
+        autosync_writes = config["autosync_writes"].uint64_value();
+    }
     if (!config["client_queue_depth"].is_null())
     {
         client_queue_depth = config["client_queue_depth"].uint64_value();
@@ -153,6 +164,34 @@ void osd_t::bind_socket()
     int enable = 1;
     setsockopt(listen_fd, SOL_SOCKET, SO_REUSEADDR, &enable, sizeof(enable));
 
+    if (config["osd_network"].is_string() ||
+        config["osd_network"].is_array())
+    {
+        std::vector<std::string> mask;
+        if (config["osd_network"].is_string())
+            mask.push_back(config["osd_network"].string_value());
+        else
+            for (auto v: config["osd_network"].array_items())
+                mask.push_back(v.string_value());
+        auto matched_addrs = getifaddr_list(mask, false);
+        if (matched_addrs.size() > 1)
+        {
+            fprintf(stderr, "More than 1 address matches requested network(s): %s\n", json11::Json(matched_addrs).dump().c_str());
+            force_stop(1);
+        }
+        if (!matched_addrs.size())
+        {
+            std::string nets;
+            for (auto v: mask)
+                nets += (nets == "" ? v : ","+v);
+            fprintf(stderr, "Addresses matching osd_network(s) %s not found\n", nets.c_str());
+            force_stop(1);
+        }
+        bind_address = matched_addrs[0];
+    }
+
+    // FIXME Support multiple listening sockets
+
     sockaddr_in addr;
     int r;
     if ((r = inet_pton(AF_INET, bind_address.c_str(), &addr.sin_addr)) != 1)

src/osd.h

@@ -35,6 +35,7 @@
 
 #define MAX_AUTOSYNC_INTERVAL 3600
 #define DEFAULT_AUTOSYNC_INTERVAL 5
+#define DEFAULT_AUTOSYNC_WRITES 128
 #define MAX_RECOVERY_QUEUE 2048
 #define DEFAULT_RECOVERY_QUEUE 4
 #define DEFAULT_RECOVERY_BATCH 16
@@ -93,7 +94,7 @@ class osd_t
     // config
 
     json11::Json::object config;
-    int etcd_report_interval = 30;
+    int etcd_report_interval = 5;
 
     bool readonly = false;
     osd_num_t osd_num = 1; // OSD numbers start with 1
@@ -108,7 +109,8 @@ class osd_t
     int print_stats_interval = 3;
     int slow_log_interval = 10;
     int immediate_commit = IMMEDIATE_NONE;
-    int autosync_interval = DEFAULT_AUTOSYNC_INTERVAL; // sync every 5 seconds
+    int autosync_interval = DEFAULT_AUTOSYNC_INTERVAL; // "emergency" sync every 5 seconds
+    int autosync_writes = DEFAULT_AUTOSYNC_WRITES;
     int recovery_queue_depth = DEFAULT_RECOVERY_QUEUE;
     int recovery_sync_batch = DEFAULT_RECOVERY_BATCH;
     int log_level = 0;
@@ -140,6 +142,7 @@ class osd_t
     osd_op_t *autosync_op = NULL;
 
     // Unstable writes
+    uint64_t unstable_write_count = 0;
     std::map<osd_object_id_t, uint64_t> unstable_writes;
     std::deque<osd_op_t*> syncs_in_progress;
 

src/osd_cluster.cpp

@@ -15,7 +15,7 @@
 //   Peer connection is lost -> Reload connection data -> Try to reconnect
 void osd_t::init_cluster()
 {
-    if (!st_cli.etcd_addresses.size())
+    if (!st_cli.address_count())
     {
         if (run_primary)
         {
@@ -615,7 +615,7 @@ void osd_t::apply_pg_config()
                 }
                 if (currently_taken)
                 {
-                    if (pg_it->second.state & (PG_ACTIVE | PG_INCOMPLETE | PG_PEERING | PG_REPEERING))
+                    if (pg_it->second.state & (PG_ACTIVE | PG_INCOMPLETE | PG_PEERING | PG_REPEERING | PG_PEERED))
                     {
                         if (pg_it->second.target_set == pg_cfg.target_set)
                         {
@@ -703,13 +703,19 @@ void osd_t::apply_pg_config()
     this->pg_config_applied = all_applied;
 }
 
+struct reporting_pg_t
+{
+    pool_pg_num_t pool_pg_num;
+    bool history_changed;
+};
+
 void osd_t::report_pg_states()
 {
-    if (etcd_reporting_pg_state || !this->pg_state_dirty.size() || !st_cli.etcd_addresses.size())
+    if (etcd_reporting_pg_state || !this->pg_state_dirty.size() || !st_cli.address_count())
     {
         return;
     }
-    std::vector<std::pair<pool_pg_num_t,bool>> reporting_pgs;
+    std::vector<reporting_pg_t> reporting_pgs;
     json11::Json::array checks;
     json11::Json::array success;
     json11::Json::array failure;
@@ -721,7 +727,7 @@ void osd_t::report_pg_states()
             continue;
         }
         auto & pg = pg_it->second;
-        reporting_pgs.push_back({ *it, pg.history_changed });
+        reporting_pgs.push_back((reporting_pg_t){ *it, pg.history_changed });
         std::string state_key_base64 = base64_encode(st_cli.etcd_prefix+"/pg/state/"+std::to_string(pg.pool_id)+"/"+std::to_string(pg.pg_num));
         bool pg_state_exists = false;
         if (pg.state != PG_STARTING)
@@ -827,10 +833,10 @@ void osd_t::report_pg_states()
             // One of PG state updates failed, put dirty flags back
             for (auto pp: reporting_pgs)
             {
-                this->pg_state_dirty.insert(pp.first);
-                if (pp.second)
+                this->pg_state_dirty.insert(pp.pool_pg_num);
+                if (pp.history_changed)
                 {
-                    auto pg_it = this->pgs.find(pp.first);
+                    auto pg_it = this->pgs.find(pp.pool_pg_num);
                     if (pg_it != this->pgs.end())
                     {
                         pg_it->second.history_changed = true;
@@ -839,10 +845,10 @@ void osd_t::report_pg_states()
             }
             for (auto & res: data["responses"].array_items())
             {
-                if (res["kvs"].array_items().size())
+                if (res["response_range"]["kvs"].array_items().size())
                 {
-                    auto kv = st_cli.parse_etcd_kv(res["kvs"][0]);
-                    if (kv.key.substr(st_cli.etcd_prefix.length()+10) == st_cli.etcd_prefix+"/pg/state/")
+                    auto kv = st_cli.parse_etcd_kv(res["response_range"]["kvs"][0]);
+                    if (kv.key.substr(0, st_cli.etcd_prefix.length()+10) == st_cli.etcd_prefix+"/pg/state/")
                     {
                         pool_id_t pool_id = 0;
                         pg_num_t pg_num = 0;
@@ -870,17 +876,27 @@ void osd_t::report_pg_states()
             // Success. We'll get our changes back via the watcher and react to them
             for (auto pp: reporting_pgs)
             {
-                auto pg_it = this->pgs.find(pp.first);
+                auto pg_it = this->pgs.find(pp.pool_pg_num);
                 if (pg_it != this->pgs.end() &&
-                    pg_it->second.state == PG_OFFLINE &&
-                    pg_state_dirty.find(pp.first) == pg_state_dirty.end())
+                    pg_state_dirty.find(pp.pool_pg_num) == pg_state_dirty.end())
                 {
-                    // Forget offline PGs after reporting their state
-                    if (pg_it->second.scheme == POOL_SCHEME_JERASURE)
+                    if (pg_it->second.state == PG_OFFLINE)
                     {
-                        use_jerasure(pg_it->second.pg_size, pg_it->second.pg_data_size, false);
+                        // Forget offline PGs after reporting their state
+                        // (if the state wasn't changed again)
+                        if (pg_it->second.scheme == POOL_SCHEME_JERASURE)
+                        {
+                            use_jerasure(pg_it->second.pg_size, pg_it->second.pg_data_size, false);
+                        }
+                        this->pgs.erase(pg_it);
+                    }
+                    else if (pg_it->second.state & PG_PEERED)
+                    {
+                        // Activate PG after PG PEERED state is reported along with history
+                        // (if the state wasn't changed again)
+                        pg_it->second.state = pg_it->second.state & ~PG_PEERED | PG_ACTIVE;
+                        report_pg_state(pg_it->second);
                     }
-                    this->pgs.erase(pg_it);
                 }
             }
             // Push other PG state updates, if any

src/osd_peering.cpp

@@ -37,6 +37,10 @@ void osd_t::handle_peers()
                     still = true;
                 }
             }
+            else if (p.second.state & PG_PEERED)
+            {
+                still = true;
+            }
         }
         if (!still)
         {
@@ -57,6 +61,10 @@ void osd_t::handle_peers()
                 }
                 still = true;
             }
+            else if (p.second.state & PG_PEERED)
+            {
+                still = true;
+            }
         }
         if (!still)
         {
@@ -79,7 +87,7 @@ void osd_t::repeer_pgs(osd_num_t peer_osd)
     {
         auto & pg = p.second;
         bool repeer = false;
-        if (pg.state & (PG_PEERING | PG_ACTIVE | PG_INCOMPLETE))
+        if (pg.state & (PG_PEERING | PG_PEERED | PG_ACTIVE | PG_INCOMPLETE))
         {
             for (osd_num_t pg_osd: pg.all_peers)
             {
@@ -186,6 +194,24 @@ void osd_t::start_pg_peering(pg_t & pg)
             });
         }
     }
+    if (pg.pg_cursize < pg.pg_minsize)
+    {
+        pg.state = PG_INCOMPLETE;
+        report_pg_state(pg);
+        return;
+    }
+    std::set<osd_num_t> cur_peers;
+    for (auto pg_osd: pg.all_peers)
+    {
+        if (pg_osd == this->osd_num || msgr.osd_peer_fds.find(pg_osd) != msgr.osd_peer_fds.end())
+        {
+            cur_peers.insert(pg_osd);
+        }
+        else if (msgr.wanted_peers.find(pg_osd) == msgr.wanted_peers.end())
+        {
+            msgr.connect_peer(pg_osd, st_cli.peer_states[pg_osd]);
+        }
+    }
     if (pg.target_history.size())
     {
         // Refuse to start PG if no peers are available from any of the historical OSD sets
@@ -214,24 +240,6 @@ void osd_t::start_pg_peering(pg_t & pg)
             }
         }
     }
-    if (pg.pg_cursize < pg.pg_minsize)
-    {
-        pg.state = PG_INCOMPLETE;
-        report_pg_state(pg);
-        return;
-    }
-    std::set<osd_num_t> cur_peers;
-    for (auto pg_osd: pg.all_peers)
-    {
-        if (pg_osd == this->osd_num || msgr.osd_peer_fds.find(pg_osd) != msgr.osd_peer_fds.end())
-        {
-            cur_peers.insert(pg_osd);
-        }
-        else if (msgr.wanted_peers.find(pg_osd) == msgr.wanted_peers.end())
-        {
-            msgr.connect_peer(pg_osd, st_cli.peer_states[pg_osd]);
-        }
-    }
     pg.cur_peers.insert(pg.cur_peers.begin(), cur_peers.begin(), cur_peers.end());
     if (pg.peering_state)
     {

src/osd_peering_pg.cpp

@@ -86,9 +86,24 @@ void pg_obj_state_check_t::walk()
     }
     if (pg->pg_cursize < pg->pg_size)
     {
-        pg->state |= PG_DEGRADED;
+        // Report PG history and activate
+        pg->state |= PG_DEGRADED | PG_PEERED;
+        std::vector<osd_num_t> history_set;
+        for (auto peer_osd: pg->cur_set)
+        {
+            if (peer_osd != 0)
+            {
+                history_set.push_back(peer_osd);
+            }
+        }
+        pg->target_history.push_back(history_set);
+        pg->history_changed = true;
+    }
+    else
+    {
+        // Just activate
+        pg->state |= PG_ACTIVE;
     }
-    pg->state |= PG_ACTIVE;
     if (pg->state == PG_ACTIVE && pg->cur_peers.size() < pg->all_peers.size())
     {
         pg->state |= PG_LEFT_ON_DEAD;
@@ -430,10 +445,11 @@ void pg_t::calc_object_states(int log_level)
 void pg_t::print_state()
 {
     printf(
-        "[PG %u/%u] is %s%s%s%s%s%s%s%s%s%s%s%s%s%s (%lu objects)\n", pool_id, pg_num,
+        "[PG %u/%u] is %s%s%s%s%s%s%s%s%s%s%s%s%s%s%s (%lu objects)\n", pool_id, pg_num,
         (state & PG_STARTING) ? "starting" : "",
         (state & PG_OFFLINE) ? "offline" : "",
         (state & PG_PEERING) ? "peering" : "",
+        (state & PG_PEERED) ? "peered" : "",
         (state & PG_INCOMPLETE) ? "incomplete" : "",
         (state & PG_ACTIVE) ? "active" : "",
         (state & PG_REPEERING) ? "repeering" : "",

src/osd_primary_subops.cpp

@@ -5,8 +5,6 @@
 
 void osd_t::autosync()
 {
-    // FIXME Autosync based on the number of unstable writes to prevent
-    // "journal_sector_buffer_count is too low for this batch" errors
     if (immediate_commit != IMMEDIATE_ALL && !autosync_op)
     {
         autosync_op = new osd_op_t();

src/osd_primary_write.cpp

@@ -274,6 +274,11 @@ continue_others:
     }
     // finish_op would invalidate next_it if it cleared pg.write_queue, but it doesn't do that :)
     finish_op(cur_op, cur_op->reply.hdr.retval);
+    if (unstable_write_count >= autosync_writes)
+    {
+        unstable_write_count = 0;
+        autosync();
+    }
     if (next_op)
     {
         // Continue next write to the same object
@@ -353,6 +358,7 @@ resume_7:
     else
     {
 lazy:
+        unstable_write_count++;
         if (op_data->scheme != POOL_SCHEME_REPLICATED)
         {
             // Remember version as unstable for EC/XOR

src/pg_states.cpp

@@ -3,11 +3,12 @@
 
 #include "pg_states.h"
 
-const int pg_state_bit_count = 15;
+const int pg_state_bit_count = 16;
 
-const int pg_state_bits[15] = {
+const int pg_state_bits[16] = {
     PG_STARTING,
     PG_PEERING,
+    PG_PEERED,
     PG_INCOMPLETE,
     PG_ACTIVE,
     PG_REPEERING,
@@ -22,9 +23,10 @@ const int pg_state_bits[15] = {
     PG_LEFT_ON_DEAD,
 };
 
-const char *pg_state_names[15] = {
+const char *pg_state_names[16] = {
     "starting",
     "peering",
+    "peered",
     "incomplete",
     "active",
     "repeering",

src/pg_states.h

@@ -4,23 +4,27 @@
 #pragma once
 
 // Placement group states
-// STARTING -> [acquire lock] -> PEERING -> INCOMPLETE|ACTIVE -> STOPPING -> OFFLINE -> [release lock]
+// STARTING -> [acquire lock] -> PEERING -> PEERED
+// PEERED -> [report history if required!] -> INCOMPLETE|ACTIVE
+// ACTIVE -> REPEERING -> PEERING
+// ACTIVE -> STOPPING -> OFFLINE -> [release lock]
 // Exactly one of these:
 #define PG_STARTING (1<<0)
 #define PG_PEERING (1<<1)
-#define PG_INCOMPLETE (1<<2)
-#define PG_ACTIVE (1<<3)
-#define PG_REPEERING (1<<4)
-#define PG_STOPPING (1<<5)
-#define PG_OFFLINE (1<<6)
+#define PG_PEERED (1<<2)
+#define PG_INCOMPLETE (1<<3)
+#define PG_ACTIVE (1<<4)
+#define PG_REPEERING (1<<5)
+#define PG_STOPPING (1<<6)
+#define PG_OFFLINE (1<<7)
 // Plus any of these:
-#define PG_DEGRADED (1<<7)
-#define PG_HAS_INCOMPLETE (1<<8)
-#define PG_HAS_DEGRADED (1<<9)
-#define PG_HAS_MISPLACED (1<<10)
-#define PG_HAS_UNCLEAN (1<<11)
-#define PG_HAS_INVALID (1<<12)
-#define PG_LEFT_ON_DEAD (1<<13)
+#define PG_DEGRADED (1<<8)
+#define PG_HAS_INCOMPLETE (1<<9)
+#define PG_HAS_DEGRADED (1<<10)
+#define PG_HAS_MISPLACED (1<<11)
+#define PG_HAS_UNCLEAN (1<<12)
+#define PG_HAS_INVALID (1<<13)
+#define PG_LEFT_ON_DEAD (1<<14)
 
 // Lower bits that represent object role (EC 0/1/2... or always 0 with replication)
 // 12 bits is a safe default that doesn't depend on pg_stripe_size or pg_block_size