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Author SHA1 Message Date
Vitaliy Filippov c414a90abc TRACE 2020-05-28 12:41:08 +03:00
Vitaliy Filippov 36fe7d394b EPOLLLT 2020-05-28 12:41:08 +03:00
Vitaliy Filippov 540137dd23 Submit 2020-05-28 12:41:08 +03:00
216 changed files with 7412 additions and 28464 deletions

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.git
build
packages
mon/node_modules
*.o
*.so
osd
stub_osd
stub_uring_osd
stub_bench
osd_test
dump_journal
nbd_proxy
rm_inode
fio
qemu
rpm/*.Dockerfile
debian/*.Dockerfile
Dockerfile

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.gitignore vendored
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*.o
*.so
package-lock.json
fio
qemu
osd
stub_osd
stub_uring_osd
stub_bench
osd_test
osd_peering_pg_test
dump_journal
nbd_proxy
rm_inode
test_allocator
test_blockstore
test_shit
osd_rmw_test

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.gitmodules vendored
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[submodule "cpp-btree"]
path = cpp-btree
url = ../cpp-btree.git
[submodule "json11"]
path = json11
url = ../json11.git

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cmake_minimum_required(VERSION 2.8)
project(vitastor)
set(VERSION "0.6.5")
add_subdirectory(src)

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GNU GENERAL PUBLIC LICENSE
Version 2, June 1991
Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
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0. This License applies to any program or other work which contains
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How to Apply These Terms to Your New Programs
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convey the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This program is free software; you can redistribute it and/or modify
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This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
Also add information on how to contact you by electronic and paper mail.
If the program is interactive, make it output a short notice like this
when it starts in an interactive mode:
Gnomovision version 69, Copyright (C) year name of author
Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, the commands you use may
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mouse-clicks or menu items--whatever suits your program.
You should also get your employer (if you work as a programmer) or your
school, if any, to sign a "copyright disclaimer" for the program, if
necessary. Here is a sample; alter the names:
Yoyodyne, Inc., hereby disclaims all copyright interest in the program
`Gnomovision' (which makes passes at compilers) written by James Hacker.
<signature of Ty Coon>, 1 April 1989
Ty Coon, President of Vice
This General Public License does not permit incorporating your program into
proprietary programs. If your program is a subroutine library, you may
consider it more useful to permit linking proprietary applications with the
library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License.

27
LICENSE
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Copyright (c) Vitaliy Filippov (vitalif [at] yourcmc.ru), 2019+
All server-side code (OSD, Monitor and so on) is licensed under the terms of
Vitastor Network Public License 1.1 (VNPL 1.1), a copyleft license based on
GNU GPLv3.0 with the additional "Network Interaction" clause which requires
opensourcing all programs directly or indirectly interacting with Vitastor
through a computer network and expressly designed to be used in conjunction
with it ("Proxy Programs"). Proxy Programs may be made public not only under
the terms of the same license, but also under the terms of any GPL-Compatible
Free Software License, as listed by the Free Software Foundation.
This is a stricter copyleft license than the Affero GPL.
Please note that VNPL doesn't require you to open the code of proprietary
software running inside a VM if it's not specially designed to be used with
Vitastor.
Basically, you can't use the software in a proprietary environment to provide
its functionality to users without opensourcing all intermediary components
standing between the user and Vitastor or purchasing a commercial license
from the author 😀.
Client libraries (cluster_client and so on) are dual-licensed under the same
VNPL 1.1 and also GNU GPL 2.0 or later to allow for compatibility with GPLed
software like QEMU and fio.
You can find the full text of VNPL-1.1 in the file [VNPL-1.1.txt](VNPL-1.1.txt).
GPL 2.0 is also included in this repository as [GPL-2.0.txt](GPL-2.0.txt).

90
Makefile Normal file
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BLOCKSTORE_OBJS := allocator.o blockstore.o blockstore_impl.o blockstore_init.o blockstore_open.o blockstore_journal.o blockstore_read.o \
blockstore_write.o blockstore_sync.o blockstore_stable.o blockstore_rollback.o blockstore_flush.o crc32c.o ringloop.o
# -fsanitize=address
CXXFLAGS := -g -O3 -Wall -Wno-sign-compare -Wno-comment -Wno-parentheses -Wno-pointer-arith -fPIC -fdiagnostics-color=always
all: $(BLOCKSTORE_OBJS) libfio_blockstore.so osd libfio_sec_osd.so stub_osd stub_bench osd_test dump_journal
clean:
rm -f *.o
crc32c.o: crc32c.c
g++ $(CXXFLAGS) -c -o $@ $<
json11.o: json11/json11.cpp
g++ $(CXXFLAGS) -c -o json11.o json11/json11.cpp
allocator.o: allocator.cpp allocator.h
g++ $(CXXFLAGS) -c -o $@ $<
ringloop.o: ringloop.cpp ringloop.h
g++ $(CXXFLAGS) -c -o $@ $<
timerfd_interval.o: timerfd_interval.cpp timerfd_interval.h ringloop.h
g++ $(CXXFLAGS) -c -o $@ $<
timerfd_manager.o: timerfd_manager.cpp timerfd_manager.h ringloop.h
g++ $(CXXFLAGS) -c -o $@ $<
%.o: %.cpp allocator.h blockstore_flush.h blockstore.h blockstore_impl.h blockstore_init.h blockstore_journal.h crc32c.h ringloop.h object_id.h
g++ $(CXXFLAGS) -c -o $@ $<
dump_journal: dump_journal.cpp crc32c.o blockstore_journal.h
g++ $(CXXFLAGS) -o $@ $< crc32c.o
libblockstore.so: $(BLOCKSTORE_OBJS)
g++ $(CXXFLAGS) -o libblockstore.so -shared $(BLOCKSTORE_OBJS) -ltcmalloc_minimal -luring
libfio_blockstore.so: ./libblockstore.so fio_engine.cpp json11.o
g++ $(CXXFLAGS) -shared -o libfio_blockstore.so fio_engine.cpp json11.o ./libblockstore.so -ltcmalloc_minimal -luring
OSD_OBJS := osd.o osd_secondary.o osd_receive.o osd_send.o osd_peering.o osd_flush.o osd_peering_pg.o \
osd_primary.o osd_primary_subops.o etcd_state_client.o cluster_client.o osd_cluster.o http_client.o pg_states.o \
osd_rmw.o json11.o base64.o timerfd_manager.o
base64.o: base64.cpp base64.h
g++ $(CXXFLAGS) -c -o $@ $<
osd_secondary.o: osd_secondary.cpp osd.h osd_ops.h ringloop.h
g++ $(CXXFLAGS) -c -o $@ $<
osd_receive.o: osd_receive.cpp osd.h osd_ops.h ringloop.h
g++ $(CXXFLAGS) -c -o $@ $<
osd_send.o: osd_send.cpp osd.h osd_ops.h ringloop.h
g++ $(CXXFLAGS) -c -o $@ $<
osd_peering.o: osd_peering.cpp osd.h osd_ops.h osd_peering_pg.h ringloop.h
g++ $(CXXFLAGS) -c -o $@ $<
osd_cluster.o: osd_cluster.cpp osd.h osd_ops.h ringloop.h
g++ $(CXXFLAGS) -c -o $@ $<
http_client.o: http_client.cpp http_client.h
g++ $(CXXFLAGS) -c -o $@ $<
etcd_state_client.o: etcd_state_client.cpp etcd_state_client.h http_client.h pg_states.h
g++ $(CXXFLAGS) -c -o $@ $<
cluster_client.o: cluster_client.cpp cluster_client.h osd_ops.h timerfd_manager.h ringloop.h
g++ $(CXXFLAGS) -c -o $@ $<
osd_flush.o: osd_flush.cpp osd.h osd_ops.h osd_peering_pg.h ringloop.h
g++ $(CXXFLAGS) -c -o $@ $<
osd_peering_pg.o: osd_peering_pg.cpp object_id.h osd_peering_pg.h pg_states.h
g++ $(CXXFLAGS) -c -o $@ $<
pg_states.o: pg_states.cpp pg_states.h
g++ $(CXXFLAGS) -c -o $@ $<
osd_rmw.o: osd_rmw.cpp osd_rmw.h xor.h
g++ $(CXXFLAGS) -c -o $@ $<
osd_rmw_test: osd_rmw_test.cpp osd_rmw.cpp osd_rmw.h xor.h
g++ $(CXXFLAGS) -o $@ $<
osd_primary.o: osd_primary.cpp osd_primary.h osd_rmw.h osd.h osd_ops.h osd_peering_pg.h xor.h ringloop.h
g++ $(CXXFLAGS) -c -o $@ $<
osd_primary_subops.o: osd_primary_subops.cpp osd_primary.h osd_rmw.h osd.h osd_ops.h osd_peering_pg.h xor.h ringloop.h
g++ $(CXXFLAGS) -c -o $@ $<
osd.o: osd.cpp osd.h http_client.h osd_ops.h osd_peering_pg.h ringloop.h
g++ $(CXXFLAGS) -c -o $@ $<
osd: ./libblockstore.so osd_main.cpp osd.h osd_ops.h $(OSD_OBJS)
g++ $(CXXFLAGS) -o osd osd_main.cpp $(OSD_OBJS) ./libblockstore.so -ltcmalloc_minimal -luring
stub_osd: stub_osd.cpp osd_ops.h rw_blocking.o
g++ $(CXXFLAGS) -o stub_osd stub_osd.cpp rw_blocking.o -ltcmalloc_minimal
stub_bench: stub_bench.cpp osd_ops.h rw_blocking.o
g++ $(CXXFLAGS) -o stub_bench stub_bench.cpp rw_blocking.o -ltcmalloc_minimal
rw_blocking.o: rw_blocking.cpp rw_blocking.h
g++ $(CXXFLAGS) -c -o $@ $<
osd_test: osd_test.cpp osd_ops.h rw_blocking.o
g++ $(CXXFLAGS) -o osd_test osd_test.cpp rw_blocking.o -ltcmalloc_minimal
osd_peering_pg_test: osd_peering_pg_test.cpp osd_peering_pg.o
g++ $(CXXFLAGS) -o $@ $< osd_peering_pg.o -ltcmalloc_minimal
libfio_sec_osd.so: fio_sec_osd.cpp osd_ops.h rw_blocking.o
g++ $(CXXFLAGS) -ltcmalloc_minimal -shared -o libfio_sec_osd.so fio_sec_osd.cpp rw_blocking.o -luring
test_blockstore: ./libblockstore.so test_blockstore.cpp timerfd_interval.o
g++ $(CXXFLAGS) -o test_blockstore test_blockstore.cpp timerfd_interval.o ./libblockstore.so -ltcmalloc_minimal -luring
test: test.cpp osd_peering_pg.o
g++ $(CXXFLAGS) -o test test.cpp osd_peering_pg.o -luring -lm
test_allocator: test_allocator.cpp allocator.o
g++ $(CXXFLAGS) -o test_allocator test_allocator.cpp allocator.o

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## Vitastor
[Read English version](README.md)
## Идея
Я всего лишь хочу сделать качественную блочную SDS!
Vitastor - распределённая блочная SDS, прямой аналог Ceph RBD и внутренних СХД популярных
облачных провайдеров. Однако, в отличие от них, Vitastor быстрый и при этом простой.
Только пока маленький :-).
Архитектурная схожесть с Ceph означает заложенную на уровне алгоритмов записи строгую консистентность,
репликацию через первичный OSD, симметричную кластеризацию без единой точки отказа
и автоматическое распределение данных по любому числу дисков любого размера с настраиваемыми схемами
избыточности - репликацией или с произвольными кодами коррекции ошибок.
## Возможности
Vitastor на данный момент находится в статусе предварительного выпуска, расширенные
возможности пока отсутствуют, а в будущих версиях вероятны "ломающие" изменения.
Однако следующее уже реализовано:
- Базовая часть - надёжное кластерное блочное хранилище без единой точки отказа
- Производительность ;-D
- Несколько схем отказоустойчивости: репликация, XOR n+1 (1 диск чётности), коды коррекции ошибок
Рида-Соломона на основе библиотеки jerasure с любым числом дисков данных и чётности в группе
- Конфигурация через простые человекочитаемые JSON-структуры в etcd
- Автоматическое распределение данных по OSD, с поддержкой:
- Математической оптимизации для лучшей равномерности распределения и минимизации перемещений данных
- Нескольких пулов с разными схемами избыточности
- Дерева распределения, выбора OSD по тегам / классам устройств (только SSD, только HDD) и по поддереву
- Настраиваемых доменов отказа (диск/сервер/стойка и т.п.)
- Восстановление деградированных блоков
- Ребаланс, то есть перемещение данных между OSD (дисками)
- Поддержка "ленивого" fsync (fsync не на каждую операцию)
- Сбор статистики ввода/вывода в etcd
- Клиентская библиотека режима пользователя для ввода/вывода
- 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 удаления образов/инодов (vitastor-rm)
- Пакеты для Debian и CentOS
- Статистика операций ввода/вывода и занятого места в разрезе инодов
- Именование инодов через хранение их метаданных в etcd
- Снапшоты и copy-on-write клоны
- Сглаживание производительности случайной записи в SSD+HDD конфигурациях
- Поддержка RDMA/RoCEv2 через libibverbs
- CSI-плагин для Kubernetes
- Базовая поддержка OpenStack: драйвер Cinder, патчи для Nova и libvirt
## 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
- iSCSI-прокси
- Более быстрое переключение при отказах
- Фоновая проверка целостности без контрольных сумм (сверка реплик)
- Контрольные суммы
- Поддержка SSD-кэширования (tiered storage)
- Поддержка NVDIMM
- Web-интерфейс
- Возможно, сжатие
- Возможно, поддержка кэширования данных через системный page cache
## Архитектура
Так же, как и в Ceph, в Vitastor:
- Есть пулы (pools), PG, OSD, мониторы, домены отказа, дерево распределения (аналог crush-дерева).
- Образы делятся на блоки фиксированного размера (объекты), и эти объекты распределяются по OSD.
- У OSD есть журнал и метаданные и они тоже могут размещаться на отдельных быстрых дисках.
- Все операции записи тоже транзакционны. В Vitastor, правда, есть режим отложенного/ленивого fsync
(коммита), в котором fsync не вызывается на каждую операцию записи, что делает его более
пригодным для использования на "плохих" (десктопных) SSD. Однако все операции записи
в любом случае атомарны.
- Клиентская библиотека тоже старается ждать восстановления после любого отказа кластера, то есть,
вы тоже можете перезагрузить хоть весь кластер разом, и клиенты только на время зависнут,
но не отключатся.
Некоторые базовые термины для тех, кто не знаком с Ceph:
- OSD (Object Storage Daemon) - процесс, который хранит данные на одном диске и обрабатывает
запросы чтения/записи от клиентов.
- Пул (Pool) - контейнер для данных, имеющих одну и ту же схему избыточности и правила распределения по OSD.
- PG (Placement Group) - группа объектов, хранимых на одном и том же наборе реплик (OSD).
Несколько PG могут храниться на одном и том же наборе реплик, но объекты одной PG
в норме не хранятся на разных наборах OSD.
- Монитор - демон, хранящий состояние кластера.
- Домен отказа (Failure Domain) - группа OSD, которым вы разрешаете "упасть" всем вместе.
Иными словами, это группа OSD, в которые СХД не помещает разные копии одного и того же
блока данных. Например, если домен отказа - сервер, то на двух дисках одного сервера
никогда не окажется 2 и более копий одного и того же блока данных, а значит, даже
если в этом сервере откажут все диски, это будет равносильно потере только 1 копии
любого блока данных.
- Дерево распределения (Placement Tree / CRUSH Tree) - иерархическая группировка OSD
в узлы, которые далее можно использовать как домены отказа. То есть, диск (OSD) входит в
сервер, сервер входит в стойку, стойка входит в ряд, ряд в датацентр и т.п.
Чем Vitastor отличается от Ceph:
- Vitastor в первую очередь сфокусирован на SSD. Также Vitastor, вероятно, должен неплохо работать
с комбинацией SSD и HDD через bcache, а в будущем, возможно, будут добавлены и нативные способы
оптимизации под SSD+HDD. Однако хранилище на основе одних лишь жёстких дисков, вообще без SSD,
не в приоритете, поэтому оптимизации под этот кейс могут вообще не состояться.
- OSD Vitastor однопоточный и всегда таким останется, так как это самый оптимальный способ работы.
Если вам не хватает 1 ядра на 1 диск, просто делите диск на разделы и запускайте на нём несколько OSD.
Но, скорее всего, вам хватит и 1 ядра - Vitastor не так прожорлив к ресурсам CPU, как Ceph.
- Журнал и метаданные всегда размещаются в памяти, благодаря чему никогда не тратится лишнее время
на чтение метаданных с диска. Размер метаданных линейно зависит от размера диска и блока данных,
который задаётся в конфигурации кластера и по умолчанию составляет 128 КБ. С блоком 128 КБ метаданные
занимают примерно 512 МБ памяти на 1 ТБ дискового пространства (и это всё равно меньше, чем нужно Ceph-у).
Журнал вообще не должен быть большим, например, тесты производительности в данном документе проводились
с журналом размером всего 16 МБ. Большой журнал, вероятно, даже вреден, т.к. "грязные" записи (записи,
не сброшенные из журнала) тоже занимают память и могут немного замедлять работу.
- В Vitastor нет внутреннего copy-on-write. Я считаю, что реализация CoW-хранилища гораздо сложнее,
поэтому сложнее добиться устойчиво хороших результатов. Возможно, в один прекрасный день
я придумаю красивый алгоритм для CoW-хранилища, но пока нет - внутреннего CoW в Vitastor не будет.
Всё это не относится к "внешнему" CoW (снапшотам и клонам).
- Базовый слой Vitastor - простое блочное хранилище с блоками фиксированного размера, а не сложное
объектное хранилище с расширенными возможностями, как в Ceph (RADOS).
- В Vitastor есть режим "ленивых fsync", в котором OSD группирует запросы записи перед сбросом их
на диск, что позволяет получить лучшую производительность с дешёвыми настольными SSD без конденсаторов
("Advanced Power Loss Protection" / "Capacitor-Based Power Loss Protection").
Тем не менее, такой режим всё равно медленнее использования нормальных серверных SSD и мгновенного
fsync, так как приводит к дополнительным операциям передачи данных по сети, поэтому рекомендуется
всё-таки использовать хорошие серверные диски, тем более, стоят они почти так же, как десктопные.
- PG эфемерны. Это означает, что они не хранятся на дисках и существуют только в памяти работающих OSD.
- Процессы восстановления оперируют отдельными объектами, а не целыми PG.
- PGLOG-ов нет.
- "Мониторы" не хранят данные. Конфигурация и состояние кластера хранятся в etcd в простых человекочитаемых
JSON-структурах. Мониторы Vitastor только следят за состоянием кластера и управляют перемещением данных.
В этом смысле монитор Vitastor не является критичным компонентом системы и больше похож на Ceph-овский
менеджер (MGR). Монитор Vitastor написан на node.js.
- Распределение PG не основано на консистентных хешах. Вместо этого все маппинги PG хранятся прямо в etcd
(ибо нет никакой проблемы сохранить несколько сотен-тысяч записей в памяти, а не считать каждый раз хеши).
Перераспределение PG по OSD выполняется через математическую оптимизацию,
а конкретно, сведение задачи к ЛП (задаче линейного программирования) и решение оной с помощью утилиты
lp_solve. Такой подход позволяет обычно выравнивать распределение места почти идеально - равномерность
обычно составляет 96-99%, в отличие от Ceph, где на голом CRUSH-е без балансировщика обычно выходит 80-90%.
Также это позволяет минимизировать объём перемещения данных и случайность связей между OSD, а также менять
распределение вручную, не боясь сломать логику перебалансировки. В таком подходе есть и потенциальный
недостаток - есть предположение, что в очень большом кластере он может сломаться - однако вплоть до
нескольких сотен OSD подход точно работает нормально. Ну и, собственно, при необходимости легко
реализовать и консистентные хеши.
- Отдельный слой, подобный слою "CRUSH-правил", отсутствует. Вы настраиваете схемы отказоустойчивости,
домены отказа и правила выбора OSD напрямую в конфигурации пулов.
## Понимание сути производительности систем хранения
Вкратце: для быстрой хранилки задержки важнее, чем пиковые iops-ы.
Лучшая возможная задержка достигается при тестировании в 1 поток с глубиной очереди 1,
что приблизительно означает минимально нагруженное состояние кластера. В данном случае
IOPS = 1/задержка. Ни числом серверов, ни дисков, ни серверных процессов/потоков
задержка не масштабируется... Она зависит только от того, насколько быстро один
серверный процесс (и клиент) обрабатывают одну операцию.
Почему задержки важны? Потому, что некоторые приложения *не могут* использовать глубину
очереди больше 1, ибо их задача не параллелизуется. Важный пример - это все СУБД
с поддержкой консистентности (ACID), потому что все они обеспечивают её через
журналирование, а журналы пишутся последовательно и с fsync() после каждой операции.
fsync, кстати - это ещё одна очень важная вещь, про которую почти всегда забывают в тестах.
Смысл в том, что все современные диски имеют кэши/буферы записи и не гарантируют, что
данные реально физически записываются на носитель до того, как вы делаете fsync(),
который транслируется в команду сброса кэша операционной системой.
Дешёвые SSD для настольных ПК и ноутбуков очень быстрые без fsync - NVMe диски, например,
могут обработать порядка 80000 операций записи в секунду с глубиной очереди 1 без fsync.
Однако с fsync, когда они реально вынуждены писать каждый блок данных во флеш-память,
они выжимают лишь 1000-2000 операций записи в секунду (число практически постоянное
для всех моделей SSD).
Серверные SSD часто имеют суперконденсаторы, работающие как встроенный источник
бесперебойного питания и дающие дискам успеть сбросить их DRAM-кэш в постоянную
флеш-память при отключении питания. Благодаря этому диски с чистой совестью
*игнорируют fsync*, так как точно знают, что данные из кэша доедут до постоянной
памяти.
Все наиболее известные программные СХД, например, Ceph и внутренние СХД, используемые
такими облачными провайдерами, как Amazon, Google, Яндекс, медленные в смысле задержки.
В лучшем случае они дают задержки от 0.3мс на чтение и 0.6мс на запись 4 КБ блоками
даже при условии использования наилучшего возможного железа.
И это в эпоху SSD, когда вы можете пойти на рынок и купить там SSD, задержка которого
на чтение будет 0.1мс, а на запись - 0.04мс, за 100$ или даже дешевле.
Когда мне нужно быстро протестировать производительность дисковой подсистемы, я
использую следующие 6 команд, с небольшими вариациями:
- Линейная запись:
`fio -ioengine=libaio -direct=1 -invalidate=1 -name=test -bs=4M -iodepth=32 -rw=write -runtime=60 -filename=/dev/sdX`
- Линейное чтение:
`fio -ioengine=libaio -direct=1 -invalidate=1 -name=test -bs=4M -iodepth=32 -rw=read -runtime=60 -filename=/dev/sdX`
- Запись в 1 поток (T1Q1):
`fio -ioengine=libaio -direct=1 -invalidate=1 -name=test -bs=4k -iodepth=1 -fsync=1 -rw=randwrite -runtime=60 -filename=/dev/sdX`
- Чтение в 1 поток (T1Q1):
`fio -ioengine=libaio -direct=1 -invalidate=1 -name=test -bs=4k -iodepth=1 -rw=randread -runtime=60 -filename=/dev/sdX`
- Параллельная запись (numjobs используется, когда 1 ядро CPU не может насытить диск):
`fio -ioengine=libaio -direct=1 -invalidate=1 -name=test -bs=4k -iodepth=128 [-numjobs=4 -group_reporting] -rw=randwrite -runtime=60 -filename=/dev/sdX`
- Параллельное чтение (numjobs - аналогично):
`fio -ioengine=libaio -direct=1 -invalidate=1 -name=test -bs=4k -iodepth=128 [-numjobs=4 -group_reporting] -rw=randread -runtime=60 -filename=/dev/sdX`
## Теоретическая максимальная производительность Vitastor
При использовании репликации:
- Задержка чтения в 1 поток (T1Q1): 1 сетевой RTT + 1 чтение с диска.
- Запись+fsync в 1 поток:
- С мгновенным сбросом: 2 RTT + 1 запись.
- С отложенным ("ленивым") сбросом: 4 RTT + 1 запись + 1 fsync.
- Параллельное чтение: сумма IOPS всех дисков либо производительность сети, если в сеть упрётся раньше.
- Параллельная запись: сумма IOPS всех дисков / число реплик / WA либо производительность сети, если в сеть упрётся раньше.
При использовании кодов коррекции ошибок (EC):
- Задержка чтения в 1 поток (T1Q1): 1.5 RTT + 1 чтение.
- Запись+fsync в 1 поток:
- С мгновенным сбросом: 3.5 RTT + 1 чтение + 2 записи.
- С отложенным ("ленивым") сбросом: 5.5 RTT + 1 чтение + 2 записи + 2 fsync.
- Под 0.5 на самом деле подразумевается (k-1)/k, где k - число дисков данных,
что означает, что дополнительное обращение по сети не нужно, когда операция
чтения обслуживается локально.
- Параллельное чтение: сумма IOPS всех дисков либо производительность сети, если в сеть упрётся раньше.
- Параллельная запись: сумма IOPS всех дисков / общее число дисков данных и чётности / WA либо производительность сети, если в сеть упрётся раньше.
Примечание: IOPS дисков в данном случае надо брать в смешанном режиме чтения/записи в пропорции, аналогичной формулам выше.
WA (мультипликатор записи) для 4 КБ блоков в Vitastor обычно составляет 3-5:
1. Запись метаданных в журнал
2. Запись блока данных в журнал
3. Запись метаданных в БД
4. Ещё одна запись метаданных в журнал при использовании EC
5. Запись блока данных на диск данных
Если вы найдёте SSD, хорошо работающий с 512-байтными блоками данных (Optane?),
то 1, 3 и 4 можно снизить до 512 байт (1/8 от размера данных) и получить WA всего 2.375.
Кроме того, WA снижается при использовании отложенного/ленивого сброса при параллельной
нагрузке, т.к. блоки журнала записываются на диск только когда они заполняются или явным
образом запрашивается fsync.
## Пример сравнения с Ceph
Железо - 4 сервера, в каждом:
- 6x SATA SSD Intel D3-4510 3.84 TB
- 2x Xeon Gold 6242 (16 cores @ 2.8 GHz)
- 384 GB RAM
- 1x 25 GbE сетевая карта (Mellanox ConnectX-4 LX), подключённая к свитчу Juniper QFX5200
Экономия энергии CPU отключена. В тестах и Vitastor, и Ceph развёрнуто по 2 OSD на 1 SSD.
Все результаты ниже относятся к случайной нагрузке 4 КБ блоками (если явно не указано обратное).
Производительность голых дисков:
- T1Q1 запись ~27000 iops (задержка ~0.037ms)
- T1Q1 чтение ~9800 iops (задержка ~0.101ms)
- T1Q32 запись ~60000 iops
- T1Q32 чтение ~81700 iops
Ceph 15.2.4 (Bluestore):
- T1Q1 запись ~1000 iops (задержка ~1ms)
- T1Q1 чтение ~1750 iops (задержка ~0.57ms)
- T8Q64 запись ~100000 iops, потребление CPU процессами OSD около 40 ядер на каждом сервере
- T8Q64 чтение ~480000 iops, потребление CPU процессами OSD около 40 ядер на каждом сервере
Тесты в 8 потоков проводились на 8 400GB RBD образах со всех хостов (с каждого хоста запускалось 2 процесса fio).
Это нужно потому, что в Ceph несколько RBD-клиентов, пишущих в 1 образ, очень сильно замедляются.
Настройки RocksDB и Bluestore в Ceph не менялись, единственным изменением было отключение cephx_sign_messages.
На самом деле, результаты теста не такие уж и плохие для Ceph (могло быть хуже).
Собственно говоря, эти серверы как раз хорошо сбалансированы для Ceph - 6 SATA SSD как раз
утилизируют 25-гигабитную сеть, а без 2 мощных процессоров Ceph-у бы не хватило ядер,
чтобы выдать пристойный результат. Собственно, что и показывает жор 40 ядер в процессе
параллельного теста.
Vitastor:
- T1Q1 запись: 7087 iops (задержка 0.14ms)
- T1Q1 чтение: 6838 iops (задержка 0.145ms)
- T2Q64 запись: 162000 iops, потребление CPU - 3 ядра на каждом сервере
- T8Q64 чтение: 895000 iops, потребление CPU - 4 ядра на каждом сервере
- Линейная запись (4M T1Q32): 2800 МБ/с
- Линейное чтение (4M T1Q32): 1500 МБ/с
Тест на чтение в 8 потоков проводился на 1 большом образе (3.2 ТБ) со всех хостов (опять же, по 2 fio с каждого).
В Vitastor никакой разницы между 1 образом и 8-ю нет. Естественно, примерно 1/4 запросов чтения
в такой конфигурации, как и в тестах Ceph выше, обслуживалась с локальной машины. Если проводить
тест так, чтобы все операции всегда обращались к первичным OSD по сети - тест сильнее упирался
в сеть и результат составлял примерно 689000 iops.
Настройки Vitastor: `--disable_data_fsync true --immediate_commit all --flusher_count 8
--disk_alignment 4096 --journal_block_size 4096 --meta_block_size 4096
--journal_no_same_sector_overwrites true --journal_sector_buffer_count 1024
--journal_size 16777216`.
### EC/XOR 2+1
Vitastor:
- T1Q1 запись: 2808 iops (задержка ~0.355ms)
- T1Q1 чтение: 6190 iops (задержка ~0.16ms)
- T2Q64 запись: 85500 iops, потребление CPU - 3.4 ядра на каждом сервере
- T8Q64 чтение: 812000 iops, потребление CPU - 4.7 ядра на каждом сервере
- Линейная запись (4M T1Q32): 3200 МБ/с
- Линейное чтение (4M T1Q32): 1800 МБ/с
Ceph:
- T1Q1 запись: 730 iops (задержка ~1.37ms latency)
- T1Q1 чтение: 1500 iops с холодным кэшем метаданных (задержка ~0.66ms), 2300 iops через 2 минуты прогрева (задержка ~0.435ms)
- T4Q128 запись (4 RBD images): 45300 iops, потребление CPU - 30 ядер на каждом сервере
- T8Q64 чтение (4 RBD images): 278600 iops, потребление CPU - 40 ядер на каждом сервере
- Линейная запись (4M T1Q32): 1950 МБ/с в пустой образ, 2500 МБ/с в заполненный образ
- Линейное чтение (4M T1Q32): 2400 МБ/с
### NBD
NBD расшифровывается как "сетевое блочное устройство", но на самом деле оно также
работает просто как аналог FUSE для блочных устройств, то есть, представляет собой
"блочное устройство в пространстве пользователя".
NBD - на данный момент единственный способ монтировать Vitastor ядром Linux.
NBD немного снижает производительность, так как приводит к дополнительным копированиям
данных между ядром и пространством пользователя. Тем не менее, способ достаточно оптимален,
а производительность случайного доступа вообще затрагивается слабо.
Vitastor с однопоточной NBD прокси на том же стенде:
- T1Q1 запись: 6000 iops (задержка 0.166ms)
- T1Q1 чтение: 5518 iops (задержка 0.18ms)
- T1Q128 запись: 94400 iops
- T1Q128 чтение: 103000 iops
- Линейная запись (4M T1Q128): 1266 МБ/с (в сравнении с 2800 МБ/с через fio)
- Линейное чтение (4M T1Q128): 975 МБ/с (в сравнении с 1500 МБ/с через fio)
## Установка
### Debian
- Добавьте ключ репозитория Vitastor:
`wget -q -O - https://vitastor.io/debian/pubkey | sudo apt-key add -`
- Добавьте репозиторий Vitastor в /etc/apt/sources.list:
- Debian 11 (Bullseye/Sid): `deb https://vitastor.io/debian bullseye main`
- Debian 10 (Buster): `deb https://vitastor.io/debian buster main`
- Для Debian 10 (Buster) также включите репозиторий backports:
`deb http://deb.debian.org/debian buster-backports main`
- Установите пакеты: `apt update; apt install vitastor lp-solve etcd linux-image-amd64 qemu`
### CentOS
- Добавьте в систему репозиторий Vitastor:
- CentOS 7: `yum install https://vitastor.io/rpms/centos/7/vitastor-release-1.0-1.el7.noarch.rpm`
- CentOS 8: `dnf install https://vitastor.io/rpms/centos/8/vitastor-release-1.0-1.el8.noarch.rpm`
- Включите EPEL: `yum/dnf install epel-release`
- Включите дополнительные репозитории CentOS:
- CentOS 7: `yum install centos-release-scl`
- CentOS 8: `dnf install centos-release-advanced-virtualization`
- Включите elrepo-kernel:
- CentOS 7: `yum install https://www.elrepo.org/elrepo-release-7.el7.elrepo.noarch.rpm`
- CentOS 8: `dnf install https://www.elrepo.org/elrepo-release-8.el8.elrepo.noarch.rpm`
- Установите пакеты: `yum/dnf install vitastor lpsolve etcd kernel-ml qemu-kvm`
### Установка из исходников
- Установите ядро 5.4 или более новое, для поддержки io_uring. Желательно 5.8 или даже новее,
так как в 5.4 есть как минимум 1 известный баг, ведущий к зависанию с io_uring и контроллером HP SmartArray.
- Установите liburing 0.4 или более новый и его заголовки.
- Установите lp_solve.
- Установите etcd, версии не ниже 3.4.15. Более ранние версии работать не будут из-за различных багов,
например [#12402](https://github.com/etcd-io/etcd/pull/12402). Также вы можете взять версию 3.4.13 с
этим конкретным исправлением из ветки release-3.4 репозитория https://github.com/vitalif/etcd/.
- Установите node.js 10 или новее.
- Установите gcc и g++ 8.x или новее.
- Склонируйте данный репозиторий с подмодулями: `git clone https://yourcmc.ru/git/vitalif/vitastor/`.
- Желательно пересобрать QEMU с патчем, который делает необязательным запуск через LD_PRELOAD.
См `patches/qemu-*.*-vitastor.patch` - выберите версию, наиболее близкую вашей версии QEMU.
- Установите QEMU 3.0 или новее, возьмите исходные коды установленного пакета, начните его пересборку,
через некоторое время остановите её и скопируйте следующие заголовки:
- `<qemu>/include` &rarr; `<vitastor>/qemu/include`
- Debian:
* Берите qemu из основного репозитория
* `<qemu>/b/qemu/config-host.h` &rarr; `<vitastor>/qemu/b/qemu/config-host.h`
* `<qemu>/b/qemu/qapi` &rarr; `<vitastor>/qemu/b/qemu/qapi`
- CentOS 8:
* Берите qemu из репозитория Advanced-Virtualization. Чтобы включить его, запустите
`yum install centos-release-advanced-virtualization.noarch` и далее `yum install qemu`
* `<qemu>/config-host.h` &rarr; `<vitastor>/qemu/b/qemu/config-host.h`
* Для QEMU 3.0+: `<qemu>/qapi` &rarr; `<vitastor>/qemu/b/qemu/qapi`
* Для QEMU 2.0+: `<qemu>/qapi-types.h` &rarr; `<vitastor>/qemu/b/qemu/qapi-types.h`
- `config-host.h` и `qapi` нужны, т.к. в них содержатся автогенерируемые заголовки
- Установите fio 3.7 или новее, возьмите исходники пакета и сделайте на них симлинк с `<vitastor>/fio`.
- Соберите и установите Vitastor командой `mkdir build && cd build && cmake .. && make -j8 && make install`.
Обратите внимание на переменную cmake `QEMU_PLUGINDIR` - под RHEL её нужно установить равной `qemu-kvm`.
## Запуск
Внимание: процедура пока что достаточно нетривиальная, задавать конфигурацию и смещения
на диске нужно почти вручную. Это будет исправлено в ближайшем будущем.
- Желательны SATA SSD или NVMe диски с конденсаторами (серверные SSD). Можно использовать и
десктопные SSD, включив режим отложенного fsync, но производительность однопоточной записи
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:
- `disable_data_fsync 1` - отключает fsync, используется с SSD с конденсаторами.
- `immediate_commit all` - используется с SSD с конденсаторами.
- `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.
Не волнуйтесь об этой настройке, 256 теперь достаточно практически всегда.
- `disk_alignment`, `journal_block_size`, `meta_block_size` следует установить равными размеру
внутреннего блока SSD. Это почти всегда 4096.
- `journal_no_same_sector_overwrites true` запрещает перезапись одного и того же сектора журнала подряд
много раз в процессе записи. Большинство (99%) SSD не нуждаются в данной опции. Однако выяснилось, что
диски, используемые на одном из тестовых стендов - Intel D3-S4510 - очень сильно не любят такую
перезапись, и для них была добавлена эта опция. Когда данный режим включён, также нужно поднимать
значение `journal_sector_buffer_count`, так как иначе Vitastor не хватит буферов для записи в журнал.
- Запустите все etcd: `systemctl start etcd`
- Создайте глобальную конфигурацию в etcd: `etcdctl --endpoints=... put /vitastor/config/global '{"immediate_commit":"all"}'`
(если все ваши диски - серверные с конденсаторами).
- Создайте пулы: `etcdctl --endpoints=... put /vitastor/config/pools '{"1":{"name":"testpool","scheme":"replicated","pg_size":2,"pg_minsize":1,"pg_count":256,"failure_domain":"host"}}'`.
Для jerasure EC-пулов конфигурация должна выглядеть так: `2:{"name":"ecpool","scheme":"jerasure","pg_size":4,"parity_chunks":2,"pg_minsize":2,"pg_count":256,"failure_domain":"host"}`.
- Запустите все OSD: `systemctl start vitastor.target`
- Ваш кластер должен быть готов - один из мониторов должен уже сконфигурировать PG, а OSD должны запустить их.
- Вы можете проверить состояние PG прямо в etcd: `etcdctl --endpoints=... get --prefix /vitastor/pg/state`. Все PG должны быть 'active'.
### Задать имя образу
```
etcdctl --endpoints=<etcd> put /vitastor/config/inode/<pool>/<inode> '{"name":"<name>","size":<size>[,"parent_id":<parent_inode_number>][,"readonly":true]}'
```
Например:
```
etcdctl --endpoints=http://10.115.0.10:2379/v3 put /vitastor/config/inode/1/1 '{"name":"testimg","size":2147483648}'
```
Если вы зададите parent_id, то образ станет CoW-клоном, т.е. все новые запросы записи пойдут в новый инод, а запросы
чтения будут проверять сначала его, а потом родительские слои по цепочке вверх. Чтобы случайно не перезаписать данные
в родительском слое, вы можете переключить его в режим "только чтение", добавив флаг `"readonly":true` в его запись
метаданных. В таком случае родительский образ становится просто снапшотом.
Таким образом, для создания снапшота вам нужно просто переименовать предыдущий inode (например, из testimg в testimg@0),
сделать его readonly и создать новый слой с исходным именем образа (testimg), ссылающийся на только что переименованный
в качестве родительского.
### Запуск тестов с fio
Пример команды для запуска тестов:
```
fio -thread -ioengine=libfio_vitastor.so -name=test -bs=4M -direct=1 -iodepth=16 -rw=write -etcd=10.115.0.10:2379/v3 -image=testimg
```
Если вы не хотите обращаться к образу по имени, вместо `-image=testimg` можно указать номер пула, номер инода и размер:
`-pool=1 -inode=1 -size=400G`.
### Загрузить образ диска ВМ в/из Vitastor
Используйте qemu-img и строку `vitastor:etcd_host=<HOST>:image=<IMAGE>` в качестве имени файла диска. Например:
```
qemu-img convert -f qcow2 debian10.qcow2 -p -O raw 'vitastor:etcd_host=10.115.0.10\:2379/v3:image=testimg'
```
Обратите внимание, что если вы используете немодифицированный QEMU, потребуется установить переменную окружения
`LD_PRELOAD=/usr/lib/x86_64-linux-gnu/qemu/block-vitastor.so`.
Если вы не хотите обращаться к образу по имени, вместо `:image=<IMAGE>` можно указать номер пула, номер инода и размер:
`:pool=<POOL>:inode=<INODE>:size=<SIZE>`.
### Запустить ВМ
Для запуска QEMU используйте опцию `-drive file=vitastor:etcd_host=<HOST>:image=<IMAGE>` (аналогично qemu-img)
и физический размер блока 4 KB.
Например:
```
qemu-system-x86_64 -enable-kvm -m 1024
-drive 'file=vitastor:etcd_host=10.115.0.10\:2379/v3:image=testimg',format=raw,if=none,id=drive-virtio-disk0,cache=none
-device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x5,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1,write-cache=off,physical_block_size=4096,logical_block_size=512
-vnc 0.0.0.0:0
```
Обращение по номерам (`:pool=<POOL>:inode=<INODE>:size=<SIZE>` вместо `:image=<IMAGE>`) работает аналогично qemu-img.
### Удалить образ
Используйте утилиту vitastor-rm. Например:
```
vitastor-rm --etcd_address 10.115.0.10:2379/v3 --pool 1 --inode 1 --parallel_osds 16 --iodepth 32
```
### NBD
Чтобы создать локальное блочное устройство, используйте NBD. Например:
```
vitastor-nbd map --etcd_address 10.115.0.10:2379/v3 --image testimg
```
Команда напечатает название устройства вида /dev/nbd0, которое потом можно будет форматировать
и использовать как обычное блочное устройство.
Для обращения по номеру инода, аналогично другим командам, можно использовать опции
`--pool <POOL> --inode <INODE> --size <SIZE>` вместо `--image testimg`.
### Kubernetes
У Vitastor есть CSI-плагин для Kubernetes, поддерживающий RWO-тома.
Для установки возьмите манифесты из директории [csi/deploy/](csi/deploy/), поместите
вашу конфигурацию подключения к Vitastor в [csi/deploy/001-csi-config-map.yaml](001-csi-config-map.yaml),
настройте StorageClass в [csi/deploy/009-storage-class.yaml](009-storage-class.yaml)
и примените все `NNN-*.yaml` к вашей инсталляции Kubernetes.
```
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).
## Известные проблемы
- Запросы удаления объектов могут в данный момент приводить к "неполным" объектам в EC-пулах,
если в процессе удаления произойдут отказы OSD или серверов, потому что правильная обработка
запросов удаления в кластере должна быть "трёхфазной", а это пока не реализовано. Если вы
столкнётесь с такой ситуацией, просто повторите запрос удаления.
## Принципы реализации
- Я люблю архитектурно простые решения. Vitastor проектируется именно так и я намерен
и далее следовать данному принципу.
- Если вы пришли сюда за идеальным кодом на C++, вы, вероятно, не по адресу. "Общепринятые"
практики написания C++ кода меня не очень волнуют, так как зачастую, опять-таки, ведут к
излишним усложнениям и код получается красивый... но медленный.
- По той же причине в коде иногда можно встретить велосипеды типа собственного упрощённого
HTTP-клиента для работы с etcd. Зато эти велосипеды маленькие и компактные и не требуют
использования десятка внешних библиотек.
- node.js для монитора - не случайный выбор. Он очень быстрый, имеет встроенную событийную
машину, приятный нейтральный C-подобный язык программирования и развитую инфраструктуру.
## Автор и лицензия
Автор: Виталий Филиппов (vitalif [at] yourcmc.ru), 2019+
Заходите в Telegram-чат Vitastor: https://t.me/vitastor
Лицензия: VNPL 1.1 на серверный код и двойная VNPL 1.1 + GPL 2.0+ на клиентский.
VNPL - "сетевой копилефт", собственная свободная копилефт-лицензия
Vitastor Network Public License 1.1, основанная на GNU GPL 3.0 с дополнительным
условием "Сетевого взаимодействия", требующим распространять все программы,
специально разработанные для использования вместе с Vitastor и взаимодействующие
с ним по сети, под лицензией VNPL или под любой другой свободной лицензией.
Идея VNPL - расширение действия копилефта не только на модули, явным образом
связываемые с кодом Vitastor, но также на модули, оформленные в виде микросервисов
и взаимодействующие с ним по сети.
Таким образом, если вы хотите построить на основе Vitastor сервис, содержаший
компоненты с закрытым кодом, взаимодействующие с Vitastor, вам нужна коммерческая
лицензия от автора 😀.
На Windows и любое другое ПО, не разработанное *специально* для использования
вместе с Vitastor, никакие ограничения не накладываются.
Клиентские библиотеки распространяются на условиях двойной лицензии VNPL 1.0
и также на условиях GNU GPL 2.0 или более поздней версии. Так сделано в целях
совместимости с таким ПО, как QEMU и fio.
Вы можете найти полный текст VNPL 1.1 в файле [VNPL-1.1.txt](VNPL-1.1.txt),
а GPL 2.0 в файле [GPL-2.0.txt](GPL-2.0.txt).

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## Vitastor
[Читать на русском](README-ru.md)
## The Idea
Make Software-Defined Block Storage Great Again.
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).
## Features
Vitastor is currently a pre-release, a lot of features are missing and you can still expect
breaking changes in the future. However, the following is implemented:
- Basic part: highly-available block storage with symmetric clustering and no SPOF
- Performance ;-D
- Multiple redundancy schemes: Replication, XOR n+1, Reed-Solomon erasure codes
based on jerasure library with any number of data and parity drives in a group
- Configuration via simple JSON data structures in etcd
- Automatic data distribution over OSDs, with support for:
- Mathematical optimization for better uniformity and less data movement
- Multiple pools
- Placement tree, OSD selection by tags (device classes) and placement root
- Configurable failure domains
- Recovery of degraded blocks
- Rebalancing (data movement between OSDs)
- Lazy fsync support
- I/O statistics reporting to etcd
- Generic user-space client library
- 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-rm)
- Packaging for Debian and CentOS
- Per-inode I/O and space usage statistics
- Inode metadata storage in etcd
- Snapshots and copy-on-write image clones
- Write throttling to smooth random write workloads in SSD+HDD configurations
- RDMA/RoCEv2 support via libibverbs
- CSI plugin for Kubernetes
- Basic OpenStack support: Cinder driver, Nova and libvirt patches
## Roadmap
- Snapshot deletion (layer merge) support
- Better OSD creation and auto-start tools
- Other administrative tools
- Plugins for OpenNebula, Proxmox and other cloud systems
- iSCSI proxy
- Faster failover
- Scrubbing without checksums (verification of replicas)
- Checksums
- Tiered storage
- NVDIMM support
- Web GUI
- Compression (possibly)
- Read caching using system page cache (possibly)
## Architecture
Similarities:
- Just like Ceph, Vitastor has Pools, PGs, OSDs, Monitors, Failure Domains, Placement Tree.
- Just like Ceph, Vitastor is transactional (even though there's a "lazy fsync mode" which
doesn't implicitly flush every operation to disks).
- OSDs also have journal and metadata and they can also be put on separate drives.
- Just like in Ceph, client library attempts to recover from any cluster failure so
you can basically reboot the whole cluster and only pause, but not crash, your clients
(I consider this a bug if the client crashes in that case).
Some basic terms for people not familiar with Ceph:
- OSD (Object Storage Daemon) is a process that stores data and serves read/write requests.
- PG (Placement Group) is a container for data that (normally) shares the same replicas.
- Pool is a container for data that has the same redundancy scheme and placement rules.
- Monitor is a separate daemon that watches cluster state and handles failures.
- Failure Domain is a group of OSDs that you allow to fail. It's "host" by default.
- Placement Tree groups OSDs in a hierarchy to later split them into Failure Domains.
Architectural differences from Ceph:
- Vitastor's primary focus is on SSDs. Proper SSD+HDD optimizations may be added in the future, though.
- Vitastor OSD is (and will always be) single-threaded. If you want to dedicate more than 1 core
per drive you should run multiple OSDs each on a different partition of the drive.
Vitastor isn't CPU-hungry though (as opposed to Ceph), so 1 core is sufficient in a lot of cases.
- Metadata and journal are always kept in memory. Metadata size depends linearly on drive capacity
and data store block size which is 128 KB by default. With 128 KB blocks metadata should occupy
around 512 MB per 1 TB (which is still less than Ceph wants). Journal doesn't have to be big,
the example test below was conducted with only 16 MB journal. A big journal is probably even
harmful as dirty write metadata also take some memory.
- Vitastor storage layer doesn't have internal copy-on-write or redirect-write. I know that maybe
it's possible to create a good copy-on-write storage, but it's much harder and makes performance
less deterministic, so CoW isn't used in Vitastor.
- The basic layer of Vitastor is block storage with fixed-size blocks, not object storage with
rich semantics like in Ceph (RADOS).
- There's a "lazy fsync" mode which allows to batch writes before flushing them to the disk.
This allows to use Vitastor with desktop SSDs, but still lowers performance due to additional
network roundtrips, so use server SSDs with capacitor-based power loss protection
("Advanced Power Loss Protection") for best performance.
- PGs are ephemeral. This means that they aren't stored on data disks and only exist in memory
while OSDs are running.
- Recovery process is per-object (per-block), not per-PG. Also there are no PGLOGs.
- Monitors don't store data. Cluster configuration and state is stored in etcd in simple human-readable
JSON structures. Monitors only watch cluster state and handle data movement.
Thus Vitastor's Monitor isn't a critical component of the system and is more similar to Ceph's Manager.
Vitastor's Monitor is implemented in node.js.
- PG distribution isn't based on consistent hashes. All PG mappings are stored in etcd.
Rebalancing PGs between OSDs is done by mathematical optimization - data distribution problem
is reduced to a linear programming problem and solved by lp_solve. This allows for almost
perfect (96-99% uniformity compared to Ceph's 80-90%) data distribution in most cases, ability
to map PGs by hand without breaking rebalancing logic, reduced OSD peer-to-peer communication
(on average, OSDs have fewer peers) and less data movement. It also probably has a drawback -
this method may fail in very large clusters, but up to several hundreds of OSDs it's perfectly fine.
It's also easy to add consistent hashes in the future if something proves their necessity.
- There's no separate CRUSH layer. You select pool redundancy scheme, placement root, failure domain
and so on directly in pool configuration.
## Understanding Storage Performance
The most important thing for fast storage is latency, not parallel iops.
The best possible latency is achieved with one thread and queue depth of 1 which basically means
"client load as low as possible". In this case IOPS = 1/latency, and this number doesn't
scale with number of servers, drives, server processes or threads and so on.
Single-threaded IOPS and latency numbers only depend on *how fast a single daemon is*.
Why is it important? It's important because some of the applications *can't* use
queue depth greater than 1 because their task isn't parallelizable. A notable example
is any ACID DBMS because all of them write their WALs sequentially with fsync()s.
fsync, by the way, is another important thing often missing in benchmarks. The point is
that drives have cache buffers and don't guarantee that your data is actually persisted
until you call fsync() which is translated to a FLUSH CACHE command by the OS.
Desktop SSDs are very fast without fsync - NVMes, for example, can process ~80000 write
operations per second with queue depth of 1 without fsync - but they're really slow with
fsync because they have to actually write data to flash chips when you call fsync. Typical
number is around 1000-2000 iops with fsync.
Server SSDs often have supercapacitors that act as a built-in UPS and allow the drive
to flush its DRAM cache to the persistent flash storage when a power loss occurs.
This makes them perform equally well with and without fsync. This feature is called
"Advanced Power Loss Protection" by Intel; other vendors either call it similarly
or directly as "Full Capacitor-Based Power Loss Protection".
All software-defined storages that I currently know are slow in terms of latency.
Notable examples are Ceph and internal SDSes used by cloud providers like Amazon, Google,
Yandex and so on. They're all slow and can only reach ~0.3ms read and ~0.6ms 4 KB write latency
with best-in-slot hardware.
And that's in the SSD era when you can buy an SSD that has ~0.04ms latency for 100 $.
I use the following 6 commands with small variations to benchmark any storage:
- Linear write:
`fio -ioengine=libaio -direct=1 -invalidate=1 -name=test -bs=4M -iodepth=32 -rw=write -runtime=60 -filename=/dev/sdX`
- Linear read:
`fio -ioengine=libaio -direct=1 -invalidate=1 -name=test -bs=4M -iodepth=32 -rw=read -runtime=60 -filename=/dev/sdX`
- Random write latency (T1Q1, this hurts storages the most):
`fio -ioengine=libaio -direct=1 -invalidate=1 -name=test -bs=4k -iodepth=1 -fsync=1 -rw=randwrite -runtime=60 -filename=/dev/sdX`
- Random read latency (T1Q1):
`fio -ioengine=libaio -direct=1 -invalidate=1 -name=test -bs=4k -iodepth=1 -rw=randread -runtime=60 -filename=/dev/sdX`
- Parallel write iops (use numjobs if a single CPU core is insufficient to saturate the load):
`fio -ioengine=libaio -direct=1 -invalidate=1 -name=test -bs=4k -iodepth=128 [-numjobs=4 -group_reporting] -rw=randwrite -runtime=60 -filename=/dev/sdX`
- Parallel read iops (use numjobs if a single CPU core is insufficient to saturate the load):
`fio -ioengine=libaio -direct=1 -invalidate=1 -name=test -bs=4k -iodepth=128 [-numjobs=4 -group_reporting] -rw=randread -runtime=60 -filename=/dev/sdX`
## Vitastor's Theoretical Maximum Random Access Performance
Replicated setups:
- Single-threaded (T1Q1) read latency: 1 network roundtrip + 1 disk read.
- Single-threaded write+fsync latency:
- With immediate commit: 2 network roundtrips + 1 disk write.
- With lazy commit: 4 network roundtrips + 1 disk write + 1 disk flush.
- Saturated parallel read iops: min(network bandwidth, sum(disk read iops)).
- Saturated parallel write iops: min(network bandwidth, sum(disk write iops / number of replicas / write amplification)).
EC/XOR setups:
- Single-threaded (T1Q1) read latency: 1.5 network roundtrips + 1 disk read.
- Single-threaded write+fsync latency:
- With immediate commit: 3.5 network roundtrips + 1 disk read + 2 disk writes.
- With lazy commit: 5.5 network roundtrips + 1 disk read + 2 disk writes + 2 disk fsyncs.
- 0.5 in actually (k-1)/k which means that an additional roundtrip doesn't happen when
the read sub-operation can be served locally.
- Saturated parallel read iops: min(network bandwidth, sum(disk read iops)).
- Saturated parallel write iops: min(network bandwidth, sum(disk write iops * number of data drives / (number of data + parity drives) / write amplification)).
In fact, you should put disk write iops under the condition of ~10% reads / ~90% writes in this formula.
Write amplification for 4 KB blocks is usually 3-5 in Vitastor:
1. Journal block write
2. Journal data write
3. Metadata block write
4. Another journal block write for EC/XOR setups
5. Data block write
If you manage to get an SSD which handles 512 byte blocks well (Optane?) you may
lower 1, 3 and 4 to 512 bytes (1/8 of data size) and get WA as low as 2.375.
Lazy fsync also reduces WA for parallel workloads because journal blocks are only
written when they fill up or fsync is requested.
## Example Comparison with Ceph
Hardware configuration: 4 nodes, each with:
- 6x SATA SSD Intel D3-4510 3.84 TB
- 2x Xeon Gold 6242 (16 cores @ 2.8 GHz)
- 384 GB RAM
- 1x 25 GbE network interface (Mellanox ConnectX-4 LX), connected to a Juniper QFX5200 switch
CPU powersaving was disabled. Both Vitastor and Ceph were configured with 2 OSDs per 1 SSD.
All of the results below apply to 4 KB blocks and random access (unless indicated otherwise).
Raw drive performance:
- T1Q1 write ~27000 iops (~0.037ms latency)
- T1Q1 read ~9800 iops (~0.101ms latency)
- T1Q32 write ~60000 iops
- T1Q32 read ~81700 iops
Ceph 15.2.4 (Bluestore):
- T1Q1 write ~1000 iops (~1ms latency)
- T1Q1 read ~1750 iops (~0.57ms latency)
- T8Q64 write ~100000 iops, total CPU usage by OSDs about 40 virtual cores on each node
- T8Q64 read ~480000 iops, total CPU usage by OSDs about 40 virtual cores on each node
T8Q64 tests were conducted over 8 400GB RBD images from all hosts (every host was running 2 instances of fio).
This is because Ceph has performance penalties related to running multiple clients over a single RBD image.
cephx_sign_messages was set to false during tests, RocksDB and Bluestore settings were left at defaults.
In fact, not that bad for Ceph. These servers are an example of well-balanced Ceph nodes.
However, CPU usage and I/O latency were through the roof, as usual.
Vitastor:
- T1Q1 write: 7087 iops (0.14ms latency)
- T1Q1 read: 6838 iops (0.145ms latency)
- T2Q64 write: 162000 iops, total CPU usage by OSDs about 3 virtual cores on each node
- T8Q64 read: 895000 iops, total CPU usage by OSDs about 4 virtual cores on each node
- Linear write (4M T1Q32): 2800 MB/s
- Linear read (4M T1Q32): 1500 MB/s
T8Q64 read test was conducted over 1 larger inode (3.2T) from all hosts (every host was running 2 instances of fio).
Vitastor has no performance penalties related to running multiple clients over a single inode.
If conducted from one node with all primary OSDs moved to other nodes the result was slightly lower (689000 iops),
this is because all operations resulted in network roundtrips between the client and the primary OSD.
When fio was colocated with OSDs (like in Ceph benchmarks above), 1/4 of the read workload actually
used the loopback network.
Vitastor was configured with: `--disable_data_fsync true --immediate_commit all --flusher_count 8
--disk_alignment 4096 --journal_block_size 4096 --meta_block_size 4096
--journal_no_same_sector_overwrites true --journal_sector_buffer_count 1024
--journal_size 16777216`.
### EC/XOR 2+1
Vitastor:
- T1Q1 write: 2808 iops (~0.355ms latency)
- T1Q1 read: 6190 iops (~0.16ms latency)
- T2Q64 write: 85500 iops, total CPU usage by OSDs about 3.4 virtual cores on each node
- T8Q64 read: 812000 iops, total CPU usage by OSDs about 4.7 virtual cores on each node
- Linear write (4M T1Q32): 3200 MB/s
- Linear read (4M T1Q32): 1800 MB/s
Ceph:
- T1Q1 write: 730 iops (~1.37ms latency)
- T1Q1 read: 1500 iops with cold cache (~0.66ms latency), 2300 iops after 2 minute metadata cache warmup (~0.435ms latency)
- T4Q128 write (4 RBD images): 45300 iops, total CPU usage by OSDs about 30 virtual cores on each node
- T8Q64 read (4 RBD images): 278600 iops, total CPU usage by OSDs about 40 virtual cores on each node
- Linear write (4M T1Q32): 1950 MB/s before preallocation, 2500 MB/s after preallocation
- Linear read (4M T1Q32): 2400 MB/s
### NBD
NBD is currently required to mount Vitastor via kernel, but it imposes additional overhead
due to additional copying between the kernel and userspace. This mostly hurts linear
bandwidth, not iops.
Vitastor with single-thread NBD on the same hardware:
- T1Q1 write: 6000 iops (0.166ms latency)
- T1Q1 read: 5518 iops (0.18ms latency)
- T1Q128 write: 94400 iops
- T1Q128 read: 103000 iops
- Linear write (4M T1Q128): 1266 MB/s (compared to 2800 MB/s via fio)
- Linear read (4M T1Q128): 975 MB/s (compared to 1500 MB/s via fio)
## Installation
### Debian
- Trust Vitastor package signing key:
`wget -q -O - https://vitastor.io/debian/pubkey | sudo apt-key add -`
- Add Vitastor package repository to your /etc/apt/sources.list:
- Debian 11 (Bullseye/Sid): `deb https://vitastor.io/debian bullseye main`
- Debian 10 (Buster): `deb https://vitastor.io/debian buster main`
- For Debian 10 (Buster) also enable backports repository:
`deb http://deb.debian.org/debian buster-backports main`
- Install packages: `apt update; apt install vitastor lp-solve etcd linux-image-amd64 qemu`
### CentOS
- Add Vitastor package repository:
- CentOS 7: `yum install https://vitastor.io/rpms/centos/7/vitastor-release-1.0-1.el7.noarch.rpm`
- CentOS 8: `dnf install https://vitastor.io/rpms/centos/8/vitastor-release-1.0-1.el8.noarch.rpm`
- Enable EPEL: `yum/dnf install epel-release`
- Enable additional CentOS repositories:
- CentOS 7: `yum install centos-release-scl`
- CentOS 8: `dnf install centos-release-advanced-virtualization`
- Enable elrepo-kernel:
- CentOS 7: `yum install https://www.elrepo.org/elrepo-release-7.el7.elrepo.noarch.rpm`
- CentOS 8: `dnf install https://www.elrepo.org/elrepo-release-8.el8.elrepo.noarch.rpm`
- Install packages: `yum/dnf install vitastor lpsolve etcd kernel-ml qemu-kvm`
### Building from Source
- Install Linux kernel 5.4 or newer, for io_uring support. 5.8 or later is highly recommended because
there is at least one known io_uring hang with 5.4 and an HP SmartArray controller.
- Install liburing 0.4 or newer and its headers.
- Install lp_solve.
- Install etcd, at least version 3.4.15. Earlier versions won't work because of various bugs,
for example [#12402](https://github.com/etcd-io/etcd/pull/12402). You can also take 3.4.13
with this specific fix from here: https://github.com/vitalif/etcd/, branch release-3.4.
- Install node.js 10 or newer.
- Install gcc and g++ 8.x or newer.
- Clone https://yourcmc.ru/git/vitalif/vitastor/ with submodules.
- Install QEMU 3.0+, get its source, begin to build it, stop the build and copy headers:
- `<qemu>/include` &rarr; `<vitastor>/qemu/include`
- Debian:
* Use qemu packages from the main repository
* `<qemu>/b/qemu/config-host.h` &rarr; `<vitastor>/qemu/b/qemu/config-host.h`
* `<qemu>/b/qemu/qapi` &rarr; `<vitastor>/qemu/b/qemu/qapi`
- CentOS 8:
* Use qemu packages from the Advanced-Virtualization repository. To enable it, run
`yum install centos-release-advanced-virtualization.noarch` and then `yum install qemu`
* `<qemu>/config-host.h` &rarr; `<vitastor>/qemu/b/qemu/config-host.h`
* For QEMU 3.0+: `<qemu>/qapi` &rarr; `<vitastor>/qemu/b/qemu/qapi`
* For QEMU 2.0+: `<qemu>/qapi-types.h` &rarr; `<vitastor>/qemu/b/qemu/qapi-types.h`
- `config-host.h` and `qapi` are required because they contain generated headers
- You can also rebuild QEMU with a patch that makes LD_PRELOAD unnecessary to load vitastor driver.
See `patches/qemu-*.*-vitastor.patch`.
- Install fio 3.7 or later, get its source and symlink it into `<vitastor>/fio`.
- Build & install Vitastor with `mkdir build && cd build && cmake .. && make -j8 && make install`.
Pay attention to the `QEMU_PLUGINDIR` cmake option - it must be set to `qemu-kvm` on RHEL.
## Running
Please note that startup procedure isn't currently simple - you specify configuration
and calculate disk offsets almost by hand. This will be fixed in near future.
- Get some SATA or NVMe SSDs with capacitors (server-grade drives). You can use desktop SSDs
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`
- 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:
- `disable_data_fsync 1` - only safe with server-grade drives with capacitors.
- `immediate_commit all` - use this if all your drives are server-grade.
- `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.
- `disk_alignment`, `journal_block_size`, `meta_block_size` should be set to the internal
block size of your SSDs which is 4096 on most drives.
- `journal_no_same_sector_overwrites true` prevents multiple overwrites of the same journal sector.
Most (99%) SSDs don't need this option. But Intel D3-4510 does because it doesn't like when you
overwrite the same sector twice in a short period of time. The setting forces Vitastor to never
overwrite the same journal sector twice in a row which makes D3-4510 almost happy. Not totally
happy, because overwrites of the same block can still happen in the metadata area... When this
setting is set, it is also required to raise `journal_sector_buffer_count` setting, which is the
number of dirty journal sectors that may be written to at the same time.
- `systemctl start vitastor.target` everywhere.
- Create global configuration in etcd: `etcdctl --endpoints=... put /vitastor/config/global '{"immediate_commit":"all"}'`
(if all your drives have capacitors).
- Create pool configuration in etcd: `etcdctl --endpoints=... put /vitastor/config/pools '{"1":{"name":"testpool","scheme":"replicated","pg_size":2,"pg_minsize":1,"pg_count":256,"failure_domain":"host"}}'`.
For jerasure pools the configuration should look like the following: `2:{"name":"ecpool","scheme":"jerasure","pg_size":4,"parity_chunks":2,"pg_minsize":2,"pg_count":256,"failure_domain":"host"}`.
- At this point, one of the monitors will configure PGs and OSDs will start them.
- You can check PG states with `etcdctl --endpoints=... get --prefix /vitastor/pg/state`. All PGs should become 'active'.
### Name an image
```
etcdctl --endpoints=<etcd> put /vitastor/config/inode/<pool>/<inode> '{"name":"<name>","size":<size>[,"parent_id":<parent_inode_number>][,"readonly":true]}'
```
For example:
```
etcdctl --endpoints=http://10.115.0.10:2379/v3 put /vitastor/config/inode/1/1 '{"name":"testimg","size":2147483648}'
```
If you specify parent_id the image becomes a CoW clone. I.e. all writes go to the new inode and reads first check it
and then upper layers. You can then make parent readonly by updating its entry with `"readonly":true` for safety and
basically treat it as a snapshot.
So to create a snapshot you basically rename the previous upper layer (for example from testimg to testimg@0), make it readonly
and create a new top layer with the original name (testimg) and the previous one as a parent.
### Run fio benchmarks
fio command example:
```
fio -thread -ioengine=libfio_vitastor.so -name=test -bs=4M -direct=1 -iodepth=16 -rw=write -etcd=10.115.0.10:2379/v3 -image=testimg
```
If you don't want to access your image by name, you can specify pool number, inode number and size
(`-pool=1 -inode=1 -size=400G`) instead of the image name (`-image=testimg`).
### Upload VM image
Use qemu-img and `vitastor:etcd_host=<HOST>:image=<IMAGE>` disk filename. For example:
```
qemu-img convert -f qcow2 debian10.qcow2 -p -O raw 'vitastor:etcd_host=10.115.0.10\:2379/v3:image=testimg'
```
Note that the command requires to be run with `LD_PRELOAD=/usr/lib/x86_64-linux-gnu/qemu/block-vitastor.so qemu-img ...`
if you use unmodified QEMU.
You can also specify `:pool=<POOL>:inode=<INODE>:size=<SIZE>` instead of `:image=<IMAGE>`
if you don't want to use inode metadata.
### Start a VM
Run QEMU with `-drive file=vitastor:etcd_host=<HOST>:image=<IMAGE>` and use 4 KB physical block size.
For example:
```
qemu-system-x86_64 -enable-kvm -m 1024
-drive 'file=vitastor:etcd_host=10.115.0.10\:2379/v3:image=testimg',format=raw,if=none,id=drive-virtio-disk0,cache=none
-device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x5,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1,write-cache=off,physical_block_size=4096,logical_block_size=512
-vnc 0.0.0.0:0
```
You can also specify `:pool=<POOL>:inode=<INODE>:size=<SIZE>` instead of `:image=<IMAGE>`,
just like in qemu-img.
### Remove inode
Use vitastor-rm. For example:
```
vitastor-rm --etcd_address 10.115.0.10:2379/v3 --pool 1 --inode 1 --parallel_osds 16 --iodepth 32
```
### NBD
To create a local block device for a Vitastor image, use NBD. For example:
```
vitastor-nbd map --etcd_address 10.115.0.10:2379/v3 --image testimg
```
It will output the device name, like /dev/nbd0 which you can then format and mount as a normal block device.
Again, you can use `--pool <POOL> --inode <INODE> --size <SIZE>` insteaf of `--image <IMAGE>` if you want.
### Kubernetes
Vitastor has a CSI plugin for Kubernetes which supports RWO volumes.
To deploy it, take manifests from [csi/deploy/](csi/deploy/) directory, put your
Vitastor configuration in [csi/deploy/001-csi-config-map.yaml](001-csi-config-map.yaml),
configure storage class in [csi/deploy/009-storage-class.yaml](009-storage-class.yaml)
and apply all `NNN-*.yaml` manifests to your Kubernetes installation:
```
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).
## Known Problems
- Object deletion requests may currently lead to 'incomplete' objects in EC pools
if your OSDs crash during deletion because proper handling of object cleanup
in a cluster should be "three-phase" and it's currently not implemented.
Just repeat the removal request again in this case.
## Implementation Principles
- I like architecturally simple solutions. Vitastor is and will always be designed
exactly like that.
- I also like reinventing the wheel to some extent, like writing my own HTTP client
for etcd interaction instead of using prebuilt libraries, because in this case
I'm confident about what my code does and what it doesn't do.
- I don't care about C++ "best practices" like RAII or proper inheritance or usage of
smart pointers or whatever and I don't intend to change my mind, so if you're here
looking for ideal reference C++ code, this probably isn't the right place.
- I like node.js better than any other dynamically-typed language interpreter
because it's faster than any other interpreter in the world, has neutral C-like
syntax and built-in event loop. That's why Monitor is implemented in node.js.
## Author and License
Copyright (c) Vitaliy Filippov (vitalif [at] yourcmc.ru), 2019+
Join Vitastor Telegram Chat: https://t.me/vitastor
All server-side code (OSD, Monitor and so on) is licensed under the terms of
Vitastor Network Public License 1.1 (VNPL 1.1), a copyleft license based on
GNU GPLv3.0 with the additional "Network Interaction" clause which requires
opensourcing all programs directly or indirectly interacting with Vitastor
through a computer network and expressly designed to be used in conjunction
with it ("Proxy Programs"). Proxy Programs may be made public not only under
the terms of the same license, but also under the terms of any GPL-Compatible
Free Software License, as listed by the Free Software Foundation.
This is a stricter copyleft license than the Affero GPL.
Please note that VNPL doesn't require you to open the code of proprietary
software running inside a VM if it's not specially designed to be used with
Vitastor.
Basically, you can't use the software in a proprietary environment to provide
its functionality to users without opensourcing all intermediary components
standing between the user and Vitastor or purchasing a commercial license
from the author 😀.
Client libraries (cluster_client and so on) are dual-licensed under the same
VNPL 1.1 and also GNU GPL 2.0 or later to allow for compatibility with GPLed
software like QEMU and fio.
You can find the full text of VNPL-1.1 in the file [VNPL-1.1.txt](VNPL-1.1.txt).
GPL 2.0 is also included in this repository as [GPL-2.0.txt](GPL-2.0.txt).

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@ -1,648 +0,0 @@
VITASTOR NETWORK PUBLIC LICENSE
Version 1.1, 6 February 2021
Copyright (C) 2021 Vitaliy Filippov <vitalif@yourcmc.ru>
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
Preamble
The Vitastor Network Public License is a free, copyleft license for
software and other kinds of works, specifically designed to ensure
cooperation with the community in the case of network server software.
The licenses for most software and other practical works are designed
to take away your freedom to share and change the works. By contrast,
GNU General Public Licenses and Vitastor Network Public License are
intended to guarantee your freedom to share and change all versions
of a program--to make sure it remains free software for all its users.
When we speak of free software, we are referring to freedom, not
price. GNU General Public Licenses and Vitastor Network Public License
are designed to make sure that you have the freedom to distribute copies
of free software (and charge for them if you wish), that you receive
source code or can get it if you want it, that you can change the software
or use pieces of it in new free programs, and that you know you can do these
things.
Developers that use GNU General Public Licenses and Vitastor
Network Public License protect your rights with two steps:
(1) assert copyright on the software, and (2) offer
you this License which gives you legal permission to copy, distribute
and/or modify the software.
A secondary benefit of defending all users' freedom is that
improvements made in alternate versions of the program, if they
receive widespread use, become available for other developers to
incorporate. Many developers of free software are heartened and
encouraged by the resulting cooperation. However, in the case of
software used on network servers, this result may fail to come about.
The GNU General Public License permits making a modified version and
letting the public access it on a server without ever releasing its
source code to the public. Even the GNU Affero General Public License
permits running a modified version in a closed environment where
public users only interact with it through a closed-source proxy, again,
without making the program and the proxy available to the public
for free.
The Vitastor Network Public License is designed specifically to
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END OF TERMS AND CONDITIONS
How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
state the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This program is free software: you can redistribute it and/or modify
it under the terms of the Vitastor Network Public License as published by
the Vitastor Author, either version 1 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
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Vitastor Network Public License for more details.
Also add information on how to contact you by electronic and paper mail.
If your software can interact with users remotely through a computer
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get its source. For example, if your program is a web application, its
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of the code. There are many ways you could offer source, and different
solutions will be better for different programs; see section 13 for the
specific requirements.

View File

@ -1,6 +1,3 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
#include <stdexcept>
#include "allocator.h"
@ -13,19 +10,19 @@ allocator::allocator(uint64_t blocks)
{
throw std::invalid_argument("blocks");
}
uint64_t p2 = 1;
total = 0;
uint64_t p2 = 1, total = 1;
while (p2 * 64 < blocks)
{
total += p2;
p2 = p2 * 64;
total += p2;
}
total -= p2;
total += (blocks+63) / 64;
mask = new uint64_t[total];
mask = new uint64_t[2 + total];
size = free = blocks;
last_one_mask = (blocks % 64) == 0
? UINT64_MAX
: ((1l << (blocks % 64)) - 1);
: ~(UINT64_MAX << (64 - blocks % 64));
for (uint64_t i = 0; i < total; i++)
{
mask[i] = 0;
@ -37,21 +34,6 @@ allocator::~allocator()
delete[] mask;
}
bool allocator::get(uint64_t addr)
{
if (addr >= size)
{
return false;
}
uint64_t p2 = 1, offset = 0;
while (p2 * 64 < size)
{
offset += p2;
p2 = p2 * 64;
}
return ((mask[offset + addr/64] >> (addr % 64)) & 1);
}
void allocator::set(uint64_t addr, bool value)
{
if (addr >= size)
@ -114,10 +96,6 @@ uint64_t allocator::find_free()
uint64_t p2 = 1, offset = 0, addr = 0, f, i;
while (p2 < size)
{
if (offset+addr >= total)
{
return UINT64_MAX;
}
uint64_t m = mask[offset + addr];
for (i = 0, f = 1; i < 64; i++, f <<= 1)
{
@ -132,6 +110,11 @@ uint64_t allocator::find_free()
return UINT64_MAX;
}
addr = (addr * 64) | i;
if (addr >= size)
{
// No space
return UINT64_MAX;
}
offset += p2;
p2 = p2 * 64;
}
@ -142,35 +125,3 @@ uint64_t allocator::get_free_count()
{
return free;
}
void bitmap_set(void *bitmap, uint64_t start, uint64_t len, uint64_t bitmap_granularity)
{
if (start == 0)
{
if (len == 32*bitmap_granularity)
{
*((uint32_t*)bitmap) = UINT32_MAX;
return;
}
else if (len == 64*bitmap_granularity)
{
*((uint64_t*)bitmap) = UINT64_MAX;
return;
}
}
unsigned bit_start = start / bitmap_granularity;
unsigned bit_end = ((start + len) + bitmap_granularity - 1) / bitmap_granularity;
while (bit_start < bit_end)
{
if (!(bit_start & 7) && bit_end >= bit_start+8)
{
((uint8_t*)bitmap)[bit_start / 8] = UINT8_MAX;
bit_start += 8;
}
else
{
((uint8_t*)bitmap)[bit_start / 8] |= 1 << (bit_start % 8);
bit_start++;
}
}
}

View File

@ -1,6 +1,3 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
#pragma once
#include <stdint.h>
@ -8,7 +5,6 @@
// Hierarchical bitmap allocator
class allocator
{
uint64_t total;
uint64_t size;
uint64_t free;
uint64_t last_one_mask;
@ -16,10 +12,7 @@ class allocator
public:
allocator(uint64_t blocks);
~allocator();
bool get(uint64_t addr);
void set(uint64_t addr, bool value);
uint64_t find_free();
uint64_t get_free_count();
};
void bitmap_set(void *bitmap, uint64_t start, uint64_t len, uint64_t bitmap_granularity);

View File

@ -1,6 +1,3 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
#include "base64.h"
std::string base64_encode(const std::string &in)

View File

@ -1,6 +1,3 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
#pragma once
#include <string>

View File

@ -1,11 +1,8 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
#include "blockstore_impl.h"
blockstore_t::blockstore_t(blockstore_config_t & config, ring_loop_t *ringloop, timerfd_manager_t *tfd)
blockstore_t::blockstore_t(blockstore_config_t & config, ring_loop_t *ringloop)
{
impl = new blockstore_impl_t(config, ringloop, tfd);
impl = new blockstore_impl_t(config, ringloop);
}
blockstore_t::~blockstore_t()
@ -35,17 +32,17 @@ bool blockstore_t::is_safe_to_stop()
void blockstore_t::enqueue_op(blockstore_op_t *op)
{
impl->enqueue_op(op);
impl->enqueue_op(op, false);
}
int blockstore_t::read_bitmap(object_id oid, uint64_t target_version, void *bitmap, uint64_t *result_version)
void blockstore_t::enqueue_op_first(blockstore_op_t *op)
{
return impl->read_bitmap(oid, target_version, bitmap, result_version);
impl->enqueue_op(op, true);
}
std::map<uint64_t, uint64_t> & blockstore_t::get_inode_space_stats()
std::unordered_map<object_id, uint64_t> & blockstore_t::get_unstable_writes()
{
return impl->inode_space_stats;
return impl->unstable_writes;
}
uint32_t blockstore_t::get_block_size()
@ -63,7 +60,7 @@ uint64_t blockstore_t::get_free_block_count()
return impl->get_free_block_count();
}
uint32_t blockstore_t::get_bitmap_granularity()
uint32_t blockstore_t::get_disk_alignment()
{
return impl->get_bitmap_granularity();
return impl->get_disk_alignment();
}

View File

@ -1,6 +1,3 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
#pragma once
#ifndef _LARGEFILE64_SOURCE
@ -9,14 +6,12 @@
#include <stdint.h>
#include <string>
#include <map>
#include <unordered_map>
#include <functional>
#include "object_id.h"
#include "ringloop.h"
#include "timerfd_manager.h"
// Memory alignment for direct I/O (usually 512 bytes)
// All other alignments must be a multiple of this one
@ -28,19 +23,17 @@
#define DEFAULT_ORDER 17
#define MIN_BLOCK_SIZE 4*1024
#define MAX_BLOCK_SIZE 128*1024*1024
#define DEFAULT_BITMAP_GRANULARITY 4096
#define BS_OP_MIN 1
#define BS_OP_READ 1
#define BS_OP_WRITE 2
#define BS_OP_WRITE_STABLE 3
#define BS_OP_SYNC 4
#define BS_OP_STABLE 5
#define BS_OP_DELETE 6
#define BS_OP_LIST 7
#define BS_OP_ROLLBACK 8
#define BS_OP_SYNC_STAB_ALL 9
#define BS_OP_MAX 9
#define BS_OP_SYNC 3
#define BS_OP_STABLE 4
#define BS_OP_DELETE 5
#define BS_OP_LIST 6
#define BS_OP_ROLLBACK 7
#define BS_OP_SYNC_STAB_ALL 8
#define BS_OP_MAX 8
#define BS_OP_PRIVATE_DATA_SIZE 256
@ -48,9 +41,9 @@
Blockstore opcode documentation:
## BS_OP_READ / BS_OP_WRITE / BS_OP_WRITE_STABLE
## BS_OP_READ / BS_OP_WRITE
Read or write object data. WRITE_STABLE writes a version that doesn't require marking as stable.
Read or write object data.
Input:
- oid = requested object
@ -66,8 +59,6 @@ Input:
- offset, len = offset and length within object. length may be zero, in that case
read operation only returns the version / write operation only bumps the version
- buf = pre-allocated buffer for data (read) / with data (write). may be NULL if len == 0.
- bitmap = pointer to the new 'external' object bitmap data. Its part which is respective to the
write request is copied into the metadata area bitwise and stored there.
Output:
- retval = number of bytes actually read/written or negative error number (-EINVAL or -ENOSPC)
@ -122,8 +113,6 @@ Input:
- oid.stripe = PG alignment
- len = PG count or 0 to list all objects
- offset = PG number
- oid.inode = min inode number or 0 to list all inodes
- version = max inode number or 0 to list all inodes
Output:
- retval = total obj_ver_id count
@ -145,7 +134,6 @@ struct blockstore_op_t
uint32_t offset;
uint32_t len;
void *buf;
void *bitmap;
int retval;
uint8_t private_data[BS_OP_PRIVATE_DATA_SIZE];
@ -159,7 +147,7 @@ class blockstore_t
{
blockstore_impl_t *impl;
public:
blockstore_t(blockstore_config_t & config, ring_loop_t *ringloop, timerfd_manager_t *tfd);
blockstore_t(blockstore_config_t & config, ring_loop_t *ringloop);
~blockstore_t();
// Event loop
@ -180,16 +168,17 @@ public:
// Submission
void enqueue_op(blockstore_op_t *op);
// Simplified synchronous operation: get object bitmap & current version
int read_bitmap(object_id oid, uint64_t target_version, void *bitmap, uint64_t *result_version = NULL);
// Insert operation into the beginning of the queue
// Intended for the OSD syncer "thread" to be able to stabilize something when the journal is full
void enqueue_op_first(blockstore_op_t *op);
// Get per-inode space usage statistics
std::map<uint64_t, uint64_t> & get_inode_space_stats();
// Unstable writes are added here (map of object_id -> version)
std::unordered_map<object_id, uint64_t> & get_unstable_writes();
// FIXME rename to object_size
uint32_t get_block_size();
uint64_t get_block_count();
uint64_t get_free_block_count();
uint32_t get_bitmap_granularity();
uint32_t get_disk_alignment();
};

View File

@ -1,27 +1,18 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
#include "blockstore_impl.h"
journal_flusher_t::journal_flusher_t(blockstore_impl_t *bs)
journal_flusher_t::journal_flusher_t(int flusher_count, blockstore_impl_t *bs)
{
this->bs = bs;
this->max_flusher_count = bs->max_flusher_count;
this->min_flusher_count = bs->min_flusher_count;
this->cur_flusher_count = bs->min_flusher_count;
this->target_flusher_count = bs->min_flusher_count;
this->flusher_count = flusher_count;
dequeuing = false;
trimming = false;
active_flushers = 0;
syncing_flushers = 0;
// FIXME: allow to configure flusher_start_threshold and journal_trim_interval
flusher_start_threshold = bs->journal_block_size / sizeof(journal_entry_stable);
journal_trim_interval = 512;
journal_trim_counter = bs->journal.flush_journal ? 1 : 0;
trim_wanted = bs->journal.flush_journal ? 1 : 0;
journal_superblock = bs->journal.inmemory ? bs->journal.buffer : memalign_or_die(MEM_ALIGNMENT, bs->journal_block_size);
co = new journal_flusher_co[max_flusher_count];
for (int i = 0; i < max_flusher_count; i++)
sync_threshold = bs->journal_block_size / sizeof(journal_entry_stable);
journal_trim_interval = sync_threshold;
journal_trim_counter = 0;
journal_superblock = bs->journal.inmemory ? bs->journal.buffer : memalign(MEM_ALIGNMENT, bs->journal_block_size);
co = new journal_flusher_co[flusher_count];
for (int i = 0; i < flusher_count; i++)
{
co[i].bs = bs;
co[i].flusher = this;
@ -71,31 +62,14 @@ bool journal_flusher_t::is_active()
void journal_flusher_t::loop()
{
target_flusher_count = bs->write_iodepth*2;
if (target_flusher_count < min_flusher_count)
target_flusher_count = min_flusher_count;
else if (target_flusher_count > max_flusher_count)
target_flusher_count = max_flusher_count;
if (target_flusher_count > cur_flusher_count)
cur_flusher_count = target_flusher_count;
else if (target_flusher_count < cur_flusher_count)
for (int i = 0; (active_flushers > 0 || dequeuing) && i < flusher_count; i++)
{
while (target_flusher_count < cur_flusher_count)
{
if (co[cur_flusher_count-1].wait_state)
break;
cur_flusher_count--;
}
}
for (int i = 0; (active_flushers > 0 || dequeuing) && i < cur_flusher_count; i++)
co[i].loop();
}
}
void journal_flusher_t::enqueue_flush(obj_ver_id ov)
{
#ifdef BLOCKSTORE_DEBUG
printf("enqueue_flush %lx:%lx v%lu\n", ov.oid.inode, ov.oid.stripe, ov.version);
#endif
auto it = flush_versions.find(ov.oid);
if (it != flush_versions.end())
{
@ -107,18 +81,15 @@ void journal_flusher_t::enqueue_flush(obj_ver_id ov)
flush_versions[ov.oid] = ov.version;
flush_queue.push_back(ov.oid);
}
if (!dequeuing && (flush_queue.size() >= flusher_start_threshold || trim_wanted > 0))
if (!dequeuing && flush_queue.size() >= sync_threshold)
{
dequeuing = true;
bs->ringloop->wakeup();
}
}
void journal_flusher_t::unshift_flush(obj_ver_id ov, bool force)
void journal_flusher_t::unshift_flush(obj_ver_id ov)
{
#ifdef BLOCKSTORE_DEBUG
printf("unshift_flush %lx:%lx v%lu\n", ov.oid.inode, ov.oid.stripe, ov.version);
#endif
auto it = flush_versions.find(ov.oid);
if (it != flush_versions.end())
{
@ -128,62 +99,28 @@ void journal_flusher_t::unshift_flush(obj_ver_id ov, bool force)
else
{
flush_versions[ov.oid] = ov.version;
if (!force)
flush_queue.push_front(ov.oid);
}
if (force)
flush_queue.push_front(ov.oid);
if (force || !dequeuing && (flush_queue.size() >= flusher_start_threshold || trim_wanted > 0))
if (!dequeuing && flush_queue.size() >= sync_threshold)
{
dequeuing = true;
bs->ringloop->wakeup();
}
}
void journal_flusher_t::remove_flush(object_id oid)
{
#ifdef BLOCKSTORE_DEBUG
printf("undo_flush %lx:%lx\n", oid.inode, oid.stripe);
#endif
auto v_it = flush_versions.find(oid);
if (v_it != flush_versions.end())
{
flush_versions.erase(v_it);
for (auto q_it = flush_queue.begin(); q_it != flush_queue.end(); q_it++)
{
if (*q_it == oid)
{
flush_queue.erase(q_it);
break;
}
}
}
}
void journal_flusher_t::request_trim()
void journal_flusher_t::force_start()
{
dequeuing = true;
trim_wanted++;
bs->ringloop->wakeup();
}
void journal_flusher_t::mark_trim_possible()
{
if (trim_wanted > 0)
{
dequeuing = true;
journal_trim_counter++;
bs->ringloop->wakeup();
}
}
void journal_flusher_t::release_trim()
{
trim_wanted--;
}
#define await_sqe(label) \
resume_##label:\
{\
timespec now;\
clock_gettime(CLOCK_REALTIME, &now);\
printf("get_sqe %s %d %ld.%06ld\n", __FILE__, __LINE__, now.tv_sec, now.tv_nsec/1000);\
}\
sqe = bs->get_sqe();\
if (!sqe)\
{\
@ -231,23 +168,9 @@ bool journal_flusher_co::loop()
goto resume_17;
else if (wait_state == 18)
goto resume_18;
else if (wait_state == 19)
goto resume_19;
else if (wait_state == 20)
goto resume_20;
else if (wait_state == 21)
goto resume_21;
resume_0:
if (flusher->flush_queue.size() < flusher->min_flusher_count && !flusher->trim_wanted ||
!flusher->flush_queue.size() || !flusher->dequeuing)
if (!flusher->flush_queue.size() || !flusher->dequeuing)
{
stop_flusher:
if (flusher->trim_wanted > 0 && flusher->journal_trim_counter > 0)
{
// Attempt forced trim
flusher->active_flushers++;
goto trim_journal;
}
flusher->dequeuing = false;
wait_state = 0;
return true;
@ -259,11 +182,21 @@ stop_flusher:
dirty_end = bs->dirty_db.find(cur);
if (dirty_end != bs->dirty_db.end())
{
if (dirty_end->second.journal_sector >= bs->journal.dirty_start &&
(bs->journal.dirty_start >= bs->journal.used_start ||
dirty_end->second.journal_sector < bs->journal.used_start))
{
// We can't flush journal sectors that are still written to
flusher->enqueue_flush(cur);
flusher->dequeuing = false;
wait_state = 0;
return true;
}
repeat_it = flusher->sync_to_repeat.find(cur.oid);
if (repeat_it != flusher->sync_to_repeat.end())
{
#ifdef BLOCKSTORE_DEBUG
printf("Postpone %lx:%lx v%lu\n", cur.oid.inode, cur.oid.stripe, cur.version);
printf("Postpone %lu:%lu v%lu\n", cur.oid.inode, cur.oid.stripe, cur.version);
#endif
// We don't flush different parts of history of the same object in parallel
// So we check if someone is already flushing this object
@ -276,110 +209,42 @@ stop_flusher:
}
else
flusher->sync_to_repeat[cur.oid] = 0;
if (dirty_end->second.journal_sector >= bs->journal.dirty_start &&
(bs->journal.dirty_start >= bs->journal.used_start ||
dirty_end->second.journal_sector < bs->journal.used_start))
{
flusher->enqueue_flush(cur);
// We can't flush journal sectors that are still written to
// However, as we group flushes by oid, current oid may have older writes to flush!
// And it may even block writes if we don't flush the older version
// (if it's in the beginning of the journal)...
// So first try to find an older version of the same object to flush.
bool found = false;
while (dirty_end != bs->dirty_db.begin())
{
dirty_end--;
if (dirty_end->first.oid != cur.oid)
{
break;
}
if (!(dirty_end->second.journal_sector >= bs->journal.dirty_start &&
(bs->journal.dirty_start >= bs->journal.used_start ||
dirty_end->second.journal_sector < bs->journal.used_start)))
{
found = true;
cur.version = dirty_end->first.version;
break;
}
}
if (!found)
{
// Try other objects
flusher->sync_to_repeat.erase(cur.oid);
int search_left = flusher->flush_queue.size() - 1;
#ifdef BLOCKSTORE_DEBUG
printf("Flusher overran writers (dirty_start=%08lx) - searching for older flushes (%d left)\n", bs->journal.dirty_start, search_left);
#endif
while (search_left > 0)
{
cur.oid = flusher->flush_queue.front();
cur.version = flusher->flush_versions[cur.oid];
flusher->flush_queue.pop_front();
flusher->flush_versions.erase(cur.oid);
dirty_end = bs->dirty_db.find(cur);
if (dirty_end != bs->dirty_db.end())
{
if (dirty_end->second.journal_sector >= bs->journal.dirty_start &&
(bs->journal.dirty_start >= bs->journal.used_start ||
dirty_end->second.journal_sector < bs->journal.used_start))
{
#ifdef BLOCKSTORE_DEBUG
printf("Write %lx:%lx v%lu is too new: offset=%08lx\n", cur.oid.inode, cur.oid.stripe, cur.version, dirty_end->second.journal_sector);
#endif
flusher->enqueue_flush(cur);
}
else
{
repeat_it = flusher->sync_to_repeat.find(cur.oid);
if (repeat_it == flusher->sync_to_repeat.end())
{
flusher->sync_to_repeat[cur.oid] = 0;
break;
}
}
}
search_left--;
}
if (search_left <= 0)
{
#ifdef BLOCKSTORE_DEBUG
printf("No older flushes, stopping\n");
#endif
goto stop_flusher;
}
}
}
#ifdef BLOCKSTORE_DEBUG
printf("Flushing %lx:%lx v%lu\n", cur.oid.inode, cur.oid.stripe, cur.version);
printf("Flushing %lu:%lu v%lu\n", cur.oid.inode, cur.oid.stripe, cur.version);
#endif
flusher->active_flushers++;
resume_1:
// Find it in clean_db
clean_it = bs->clean_db.find(cur.oid);
old_clean_loc = (clean_it != bs->clean_db.end() ? clean_it->second.location : UINT64_MAX);
// Scan dirty versions of the object
if (!scan_dirty(1))
{
wait_state += 1;
return false;
}
// Writes and deletes shouldn't happen at the same time
assert(!has_writes || !has_delete);
if (!has_writes && !has_delete || has_delete && old_clean_loc == UINT64_MAX)
if (copy_count == 0 && clean_loc == UINT64_MAX && !has_delete && !has_empty)
{
// Nothing to flush
bs->erase_dirty(dirty_start, std::next(dirty_end), clean_loc);
goto release_oid;
flusher->active_flushers--;
repeat_it = flusher->sync_to_repeat.find(cur.oid);
if (repeat_it != flusher->sync_to_repeat.end() && repeat_it->second > cur.version)
{
// Requeue version
flusher->unshift_flush({ .oid = cur.oid, .version = repeat_it->second });
}
flusher->sync_to_repeat.erase(repeat_it);
wait_state = 0;
goto resume_0;
}
// Find it in clean_db
clean_it = bs->clean_db.find(cur.oid);
old_clean_loc = (clean_it != bs->clean_db.end() ? clean_it->second.location : UINT64_MAX);
if (clean_loc == UINT64_MAX)
{
if (old_clean_loc == UINT64_MAX)
if (copy_count > 0 && has_delete || old_clean_loc == UINT64_MAX)
{
// Object not allocated. This is a bug.
char err[1024];
snprintf(
err, 1024, "BUG: Object %lx:%lx v%lu that we are trying to flush is not allocated on the data device",
err, 1024, "BUG: Object %lu:%lu v%lu that we are trying to flush is not allocated on the data device",
cur.oid.inode, cur.oid.stripe, cur.version
);
throw std::runtime_error(err);
@ -428,18 +293,18 @@ resume_1:
{
new_clean_bitmap = (bs->inmemory_meta
? meta_new.buf + meta_new.pos*bs->clean_entry_size + sizeof(clean_disk_entry)
: bs->clean_bitmap + (clean_loc >> bs->block_order)*(2*bs->clean_entry_bitmap_size));
: bs->clean_bitmap + (clean_loc >> bs->block_order)*bs->clean_entry_bitmap_size);
if (clean_init_bitmap)
{
memset(new_clean_bitmap, 0, bs->clean_entry_bitmap_size);
bitmap_set(new_clean_bitmap, clean_bitmap_offset, clean_bitmap_len, bs->bitmap_granularity);
bitmap_set(new_clean_bitmap, clean_bitmap_offset, clean_bitmap_len);
}
}
for (it = v.begin(); it != v.end(); it++)
{
if (new_clean_bitmap)
{
bitmap_set(new_clean_bitmap, it->offset, it->len, bs->bitmap_granularity);
bitmap_set(new_clean_bitmap, it->offset, it->len);
}
await_sqe(4);
data->iov = (struct iovec){ it->buf, (size_t)it->len };
@ -473,7 +338,6 @@ resume_1:
wait_state = 5;
return false;
}
// zero out old metadata entry
memset(meta_old.buf + meta_old.pos*bs->clean_entry_size, 0, bs->clean_entry_size);
await_sqe(15);
data->iov = (struct iovec){ meta_old.buf, bs->meta_block_size };
@ -485,37 +349,18 @@ resume_1:
}
if (has_delete)
{
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);
exit(1);
}
// zero out new metadata entry
memset(meta_new.buf + meta_new.pos*bs->clean_entry_size, 0, bs->clean_entry_size);
}
else
{
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);
exit(1);
}
assert(new_entry->oid.inode == 0 || new_entry->oid == cur.oid);
new_entry->oid = cur.oid;
new_entry->version = cur.version;
if (!bs->inmemory_meta)
{
memcpy(&new_entry->bitmap, new_clean_bitmap, bs->clean_entry_bitmap_size);
}
// copy latest external bitmap/attributes
if (bs->clean_entry_bitmap_size)
{
void *bmp_ptr = bs->clean_entry_bitmap_size > sizeof(void*) ? dirty_end->second.bitmap : &dirty_end->second.bitmap;
memcpy((void*)(new_entry+1) + bs->clean_entry_bitmap_size, bmp_ptr, bs->clean_entry_bitmap_size);
}
}
await_sqe(6);
data->iov = (struct iovec){ meta_new.buf, bs->meta_block_size };
@ -565,35 +410,13 @@ resume_1:
}
// Update clean_db and dirty_db, free old data locations
update_clean_db();
#ifdef BLOCKSTORE_DEBUG
printf("Flushed %lx:%lx v%lu (%d copies, wr:%d, del:%d), %ld left\n", cur.oid.inode, cur.oid.stripe, cur.version,
copy_count, has_writes, has_delete, flusher->flush_queue.size());
#endif
release_oid:
repeat_it = flusher->sync_to_repeat.find(cur.oid);
if (repeat_it != flusher->sync_to_repeat.end() && repeat_it->second > cur.version)
{
// Requeue version
flusher->unshift_flush({ .oid = cur.oid, .version = repeat_it->second }, false);
}
flusher->sync_to_repeat.erase(repeat_it);
trim_journal:
// Clear unused part of the journal every <journal_trim_interval> flushes
if (!((++flusher->journal_trim_counter) % flusher->journal_trim_interval) || flusher->trim_wanted > 0)
if (!((++flusher->journal_trim_counter) % flusher->journal_trim_interval))
{
flusher->journal_trim_counter = 0;
new_trim_pos = bs->journal.get_trim_pos();
if (new_trim_pos != bs->journal.used_start)
if (bs->journal.trim())
{
resume_19:
// Wait for other coroutines trimming the journal, if any
if (flusher->trimming)
{
wait_state = 19;
return false;
}
flusher->trimming = true;
// First update journal "superblock" and only then update <used_start> in memory
// Update journal "superblock"
await_sqe(12);
*((journal_entry_start*)flusher->journal_superblock) = {
.crc32 = 0,
@ -601,8 +424,7 @@ resume_1:
.type = JE_START,
.size = sizeof(journal_entry_start),
.reserved = 0,
.journal_start = new_trim_pos,
.version = JOURNAL_VERSION,
.journal_start = bs->journal.used_start,
};
((journal_entry_start*)flusher->journal_superblock)->crc32 = je_crc32((journal_entry*)flusher->journal_superblock);
data->iov = (struct iovec){ flusher->journal_superblock, bs->journal_block_size };
@ -615,34 +437,20 @@ resume_1:
wait_state = 13;
return false;
}
if (!bs->disable_journal_fsync)
{
await_sqe(20);
my_uring_prep_fsync(sqe, bs->journal.fd, IORING_FSYNC_DATASYNC);
data->iov = { 0 };
data->callback = simple_callback_w;
resume_21:
if (wait_count > 0)
{
wait_state = 21;
return false;
}
}
bs->journal.used_start = new_trim_pos;
#ifdef BLOCKSTORE_DEBUG
printf("Journal trimmed to %08lx (next_free=%08lx)\n", bs->journal.used_start, bs->journal.next_free);
#endif
flusher->trimming = false;
}
if (bs->journal.flush_journal && !flusher->flush_queue.size())
{
assert(bs->journal.used_start == bs->journal.next_free);
printf("Journal flushed\n");
exit(0);
}
}
// All done
#ifdef BLOCKSTORE_DEBUG
printf("Flushed %lu:%lu v%lu\n", cur.oid.inode, cur.oid.stripe, cur.version);
#endif
flusher->active_flushers--;
repeat_it = flusher->sync_to_repeat.find(cur.oid);
if (repeat_it != flusher->sync_to_repeat.end() && repeat_it->second > cur.version)
{
// Requeue version
flusher->unshift_flush({ .oid = cur.oid, .version = repeat_it->second });
}
flusher->sync_to_repeat.erase(repeat_it);
wait_state = 0;
goto resume_0;
}
@ -661,25 +469,19 @@ bool journal_flusher_co::scan_dirty(int wait_base)
copy_count = 0;
clean_loc = UINT64_MAX;
has_delete = false;
has_writes = false;
has_empty = false;
skip_copy = false;
clean_init_bitmap = false;
while (1)
{
if (!IS_STABLE(dirty_it->second.state))
{
char err[1024];
snprintf(
err, 1024, "BUG: Unexpected dirty_entry %lx:%lx v%lu unstable state during flush: 0x%x",
dirty_it->first.oid.inode, dirty_it->first.oid.stripe, dirty_it->first.version, dirty_it->second.state
);
throw std::runtime_error(err);
}
else if (IS_JOURNAL(dirty_it->second.state) && !skip_copy)
if (dirty_it->second.state == ST_J_STABLE && !skip_copy)
{
// First we submit all reads
has_writes = true;
if (dirty_it->second.len != 0)
if (dirty_it->second.len == 0)
{
has_empty = true;
}
else
{
offset = dirty_it->second.offset;
end_offset = dirty_it->second.offset + dirty_it->second.len;
@ -693,18 +495,18 @@ bool journal_flusher_co::scan_dirty(int wait_base)
{
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;
it = v.insert(it, (copy_buffer_t){ .offset = offset, .len = submit_len, .buf = memalign_or_die(MEM_ALIGNMENT, submit_len) });
it = v.insert(it, (copy_buffer_t){ .offset = offset, .len = submit_len, .buf = memalign(MEM_ALIGNMENT, submit_len) });
copy_count++;
if (bs->journal.inmemory)
{
// Take it from memory
memcpy(it->buf, bs->journal.buffer + submit_offset, submit_len);
memcpy(v.back().buf, bs->journal.buffer + submit_offset, submit_len);
}
else
{
// Read it from disk
await_sqe(0);
data->iov = (struct iovec){ it->buf, (size_t)submit_len };
data->iov = (struct iovec){ v.back().buf, (size_t)submit_len };
data->callback = simple_callback_r;
my_uring_prep_readv(
sqe, bs->journal.fd, &data->iov, 1, bs->journal.offset + submit_offset
@ -718,22 +520,30 @@ bool journal_flusher_co::scan_dirty(int wait_base)
}
}
}
else if (IS_BIG_WRITE(dirty_it->second.state) && !skip_copy)
else if (dirty_it->second.state == ST_D_STABLE && !skip_copy)
{
// There is an unflushed big write. Copy small writes in its position
has_writes = true;
clean_loc = dirty_it->second.location;
clean_init_bitmap = true;
clean_bitmap_offset = dirty_it->second.offset;
clean_bitmap_len = dirty_it->second.len;
skip_copy = true;
}
else if (IS_DELETE(dirty_it->second.state) && !skip_copy)
else if (dirty_it->second.state == ST_DEL_STABLE && !skip_copy)
{
// There is an unflushed delete
has_delete = true;
skip_copy = true;
}
else if (!IS_STABLE(dirty_it->second.state))
{
char err[1024];
snprintf(
err, 1024, "BUG: Unexpected dirty_entry %lu:%lu v%lu state during flush: %d",
dirty_it->first.oid.inode, dirty_it->first.oid.stripe, dirty_it->first.version, dirty_it->second.state
);
throw std::runtime_error(err);
}
dirty_start = dirty_it;
if (dirty_it == bs->dirty_db.begin())
{
@ -769,7 +579,7 @@ bool journal_flusher_co::modify_meta_read(uint64_t meta_loc, flusher_meta_write_
if (wr.it == flusher->meta_sectors.end())
{
// Not in memory yet, read it
wr.buf = memalign_or_die(MEM_ALIGNMENT, bs->meta_block_size);
wr.buf = memalign(MEM_ALIGNMENT, bs->meta_block_size);
wr.it = flusher->meta_sectors.emplace(wr.sector, (meta_sector_t){
.offset = wr.sector,
.len = bs->meta_block_size,
@ -799,10 +609,7 @@ void journal_flusher_co::update_clean_db()
if (old_clean_loc != UINT64_MAX && old_clean_loc != clean_loc)
{
#ifdef BLOCKSTORE_DEBUG
printf("Free block %lu from %lx:%lx v%lu (new location is %lu)\n",
old_clean_loc >> bs->block_order,
cur.oid.inode, cur.oid.stripe, cur.version,
clean_loc >> bs->block_order);
printf("Free block %lu\n", old_clean_loc >> bs->block_order);
#endif
bs->data_alloc->set(old_clean_loc >> bs->block_order, false);
}
@ -810,11 +617,6 @@ void journal_flusher_co::update_clean_db()
{
auto clean_it = bs->clean_db.find(cur.oid);
bs->clean_db.erase(clean_it);
#ifdef BLOCKSTORE_DEBUG
printf("Free block %lu from %lx:%lx v%lu (delete)\n",
clean_loc >> bs->block_order,
cur.oid.inode, cur.oid.stripe, cur.version);
#endif
bs->data_alloc->set(clean_loc >> bs->block_order, false);
clean_loc = UINT64_MAX;
}
@ -836,7 +638,7 @@ bool journal_flusher_co::fsync_batch(bool fsync_meta, int wait_base)
goto resume_1;
else if (wait_state == wait_base+2)
goto resume_2;
if (!(fsync_meta ? bs->disable_meta_fsync : bs->disable_data_fsync))
if (!(fsync_meta ? bs->disable_meta_fsync : bs->disable_journal_fsync))
{
cur_sync = flusher->syncs.end();
while (cur_sync != flusher->syncs.begin())
@ -855,10 +657,7 @@ bool journal_flusher_co::fsync_batch(bool fsync_meta, int wait_base)
sync_found:
cur_sync->ready_count++;
flusher->syncing_flushers++;
resume_1:
if (!cur_sync->state)
{
if (flusher->syncing_flushers >= flusher->cur_flusher_count || !flusher->flush_queue.size())
if (flusher->syncing_flushers >= flusher->flusher_count || !flusher->flush_queue.size())
{
// Sync batch is ready. Do it.
await_sqe(0);
@ -867,23 +666,23 @@ bool journal_flusher_co::fsync_batch(bool fsync_meta, int wait_base)
my_uring_prep_fsync(sqe, fsync_meta ? bs->meta_fd : bs->data_fd, IORING_FSYNC_DATASYNC);
cur_sync->state = 1;
wait_count++;
resume_2:
resume_1:
if (wait_count > 0)
{
wait_state = 2;
wait_state = 1;
return false;
}
// Sync completed. All previous coroutines waiting for it must be resumed
cur_sync->state = 2;
bs->ringloop->wakeup();
}
else
{
// Wait until someone else sends and completes a sync.
wait_state = 1;
resume_2:
if (!cur_sync->state)
{
wait_state = 2;
return false;
}
}
flusher->syncing_flushers--;
cur_sync->ready_count--;
if (cur_sync->ready_count == 0)
@ -893,3 +692,35 @@ bool journal_flusher_co::fsync_batch(bool fsync_meta, int wait_base)
}
return true;
}
void journal_flusher_co::bitmap_set(void *bitmap, uint64_t start, uint64_t len)
{
if (start == 0)
{
if (len == 32*bs->bitmap_granularity)
{
*((uint32_t*)bitmap) = UINT32_MAX;
return;
}
else if (len == 64*bs->bitmap_granularity)
{
*((uint64_t*)bitmap) = UINT64_MAX;
return;
}
}
unsigned bit_start = start / bs->bitmap_granularity;
unsigned bit_end = ((start + len) + bs->bitmap_granularity - 1) / bs->bitmap_granularity;
while (bit_start < bit_end)
{
if (!(bit_start & 7) && bit_end >= bit_start+8)
{
((uint8_t*)bitmap)[bit_start / 8] = UINT8_MAX;
bit_start += 8;
}
else
{
((uint8_t*)bitmap)[bit_start / 8] |= 1 << (bit_start % 8);
bit_start++;
}
}
}

View File

@ -1,6 +1,3 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
struct copy_buffer_t
{
uint64_t offset, len;
@ -48,7 +45,7 @@ class journal_flusher_co
std::map<object_id, uint64_t>::iterator repeat_it;
std::function<void(ring_data_t*)> simple_callback_r, simple_callback_w;
bool skip_copy, has_delete, has_writes;
bool skip_copy, has_delete, has_empty;
blockstore_clean_db_t::iterator clean_it;
std::vector<copy_buffer_t> v;
std::vector<copy_buffer_t>::iterator it;
@ -59,8 +56,6 @@ class journal_flusher_co
uint64_t clean_bitmap_offset, clean_bitmap_len;
void *new_clean_bitmap;
uint64_t new_trim_pos;
// local: scan_dirty()
uint64_t offset, end_offset, submit_offset, submit_len;
@ -69,6 +64,7 @@ class journal_flusher_co
bool modify_meta_read(uint64_t meta_loc, flusher_meta_write_t &wr, int wait_base);
void update_clean_db();
bool fsync_batch(bool fsync_meta, int wait_base);
void bitmap_set(void *bitmap, uint64_t start, uint64_t len);
public:
journal_flusher_co();
bool loop();
@ -77,16 +73,14 @@ public:
// Journal flusher itself
class journal_flusher_t
{
int trim_wanted = 0;
bool dequeuing;
int min_flusher_count, max_flusher_count, cur_flusher_count, target_flusher_count;
int flusher_start_threshold;
int flusher_count;
int sync_threshold;
journal_flusher_co *co;
blockstore_impl_t *bs;
friend class journal_flusher_co;
int journal_trim_counter, journal_trim_interval;
bool trimming;
void* journal_superblock;
int active_flushers;
@ -98,14 +92,11 @@ class journal_flusher_t
std::deque<object_id> flush_queue;
std::map<object_id, uint64_t> flush_versions;
public:
journal_flusher_t(blockstore_impl_t *bs);
journal_flusher_t(int flusher_count, blockstore_impl_t *bs);
~journal_flusher_t();
void loop();
bool is_active();
void mark_trim_possible();
void request_trim();
void release_trim();
void force_start();
void enqueue_flush(obj_ver_id oid);
void unshift_flush(obj_ver_id oid, bool force);
void remove_flush(object_id oid);
void unshift_flush(obj_ver_id oid);
};

View File

@ -1,19 +1,15 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
#include "blockstore_impl.h"
blockstore_impl_t::blockstore_impl_t(blockstore_config_t & config, ring_loop_t *ringloop, timerfd_manager_t *tfd)
blockstore_impl_t::blockstore_impl_t(blockstore_config_t & config, ring_loop_t *ringloop)
{
assert(sizeof(blockstore_op_private_t) <= BS_OP_PRIVATE_DATA_SIZE);
this->tfd = tfd;
this->ringloop = ringloop;
ring_consumer.loop = [this]() { loop(); };
ringloop->register_consumer(&ring_consumer);
initialized = 0;
zero_object = (uint8_t*)memalign(MEM_ALIGNMENT, block_size);
data_fd = meta_fd = journal.fd = -1;
parse_config(config);
zero_object = (uint8_t*)memalign_or_die(MEM_ALIGNMENT, block_size);
try
{
open_data();
@ -32,7 +28,7 @@ blockstore_impl_t::blockstore_impl_t(blockstore_config_t & config, ring_loop_t *
close(journal.fd);
throw;
}
flusher = new journal_flusher_t(this);
flusher = new journal_flusher_t(flusher_count, this);
}
blockstore_impl_t::~blockstore_impl_t()
@ -93,49 +89,54 @@ void blockstore_impl_t::loop()
{
delete journal_init_reader;
journal_init_reader = NULL;
if (journal.flush_journal)
initialized = 3;
else
initialized = 10;
ringloop->wakeup();
}
}
if (initialized == 3)
{
if (readonly)
{
printf("Can't flush the journal in readonly mode\n");
exit(1);
}
flusher->loop();
ringloop->submit();
}
}
else
{
// try to submit ops
unsigned initial_ring_space = ringloop->space_left();
// has_writes == 0 - no writes before the current queue item
// has_writes == 1 - some writes in progress
// has_writes == 2 - tried to submit some writes, but failed
int has_writes = 0, op_idx = 0, new_idx = 0;
for (; op_idx < submit_queue.size(); op_idx++, new_idx++)
// FIXME: rework this "sync polling"
auto cur_sync = in_progress_syncs.begin();
while (cur_sync != in_progress_syncs.end())
{
auto op = submit_queue[op_idx];
submit_queue[new_idx] = op;
if (continue_sync(*cur_sync) != 2)
{
// List is unmodified
cur_sync++;
}
else
{
cur_sync = in_progress_syncs.begin();
}
}
auto cur = submit_queue.begin();
int has_writes = 0;
while (cur != submit_queue.end())
{
auto op_ptr = cur;
auto op = *(cur++);
// FIXME: This needs some simplification
// Writes should not block reads if the ring is not full and reads don't depend on them
// In all other cases we should stop submission
if (PRIV(op)->wait_for)
{
check_wait(op);
#ifdef BLOCKSTORE_DEBUG
if (PRIV(op)->wait_for)
{
printf("still waiting for %d\n", PRIV(op)->wait_for);
}
#endif
if (PRIV(op)->wait_for == WAIT_SQE)
{
break;
}
else if (PRIV(op)->wait_for)
{
if (op->opcode == BS_OP_WRITE || op->opcode == BS_OP_WRITE_STABLE || op->opcode == BS_OP_DELETE)
if (op->opcode == BS_OP_WRITE || op->opcode == BS_OP_DELETE)
{
has_writes = 2;
}
@ -144,33 +145,20 @@ void blockstore_impl_t::loop()
}
unsigned ring_space = ringloop->space_left();
unsigned prev_sqe_pos = ringloop->save();
// 0 = can't submit
// 1 = in progress
// 2 = can be removed from queue
int wr_st = 0;
bool dequeue_op = false;
if (op->opcode == BS_OP_READ)
{
wr_st = dequeue_read(op);
dequeue_op = dequeue_read(op);
}
else if (op->opcode == BS_OP_WRITE || op->opcode == BS_OP_WRITE_STABLE)
else if (op->opcode == BS_OP_WRITE || op->opcode == BS_OP_DELETE)
{
if (has_writes == 2)
{
// Some writes already could not be submitted
continue;
// Some writes could not be submitted
break;
}
wr_st = dequeue_write(op);
has_writes = wr_st > 0 ? 1 : 2;
}
else if (op->opcode == BS_OP_DELETE)
{
if (has_writes == 2)
{
// Some writes already could not be submitted
continue;
}
wr_st = dequeue_del(op);
has_writes = wr_st > 0 ? 1 : 2;
dequeue_op = dequeue_write(op);
has_writes = dequeue_op ? 1 : 2;
}
else if (op->opcode == BS_OP_SYNC)
{
@ -183,31 +171,43 @@ void blockstore_impl_t::loop()
// Can't submit SYNC before previous writes
continue;
}
wr_st = continue_sync(op, false);
if (wr_st != 2)
{
has_writes = wr_st > 0 ? 1 : 2;
}
dequeue_op = dequeue_sync(op);
}
else if (op->opcode == BS_OP_STABLE)
{
wr_st = dequeue_stable(op);
if (has_writes == 2)
{
// Don't submit additional flushes before completing previous LISTs
break;
}
dequeue_op = dequeue_stable(op);
}
else if (op->opcode == BS_OP_ROLLBACK)
{
wr_st = dequeue_rollback(op);
if (has_writes == 2)
{
// Don't submit additional flushes before completing previous LISTs
break;
}
dequeue_op = dequeue_rollback(op);
}
else if (op->opcode == BS_OP_LIST)
{
// LIST doesn't need to be blocked by previous modifications
process_list(op);
wr_st = 2;
}
if (wr_st == 2)
// Block LIST operation by previous modifications,
// so it always returns a consistent state snapshot
if (has_writes == 2 || inflight_writes > 0)
has_writes = 2;
else
{
new_idx--;
process_list(op);
dequeue_op = true;
}
if (wr_st == 0)
}
if (dequeue_op)
{
submit_queue.erase(op_ptr);
}
else
{
ringloop->restore(prev_sqe_pos);
if (PRIV(op)->wait_for == WAIT_SQE)
@ -218,14 +218,6 @@ void blockstore_impl_t::loop()
}
}
}
if (op_idx != new_idx)
{
while (op_idx < submit_queue.size())
{
submit_queue[new_idx++] = submit_queue[op_idx++];
}
submit_queue.resize(new_idx);
}
if (!readonly)
{
flusher->loop();
@ -248,7 +240,7 @@ bool blockstore_impl_t::is_safe_to_stop()
{
// It's safe to stop blockstore when there are no in-flight operations,
// no in-progress syncs and flusher isn't doing anything
if (submit_queue.size() > 0 || !readonly && flusher->is_active())
if (submit_queue.size() > 0 || in_progress_syncs.size() > 0 || !readonly && flusher->is_active())
{
return false;
}
@ -279,9 +271,6 @@ void blockstore_impl_t::check_wait(blockstore_op_t *op)
if (ringloop->space_left() < PRIV(op)->wait_detail)
{
// stop submission if there's still no free space
#ifdef BLOCKSTORE_DEBUG
printf("Still waiting for %lu SQE(s)\n", PRIV(op)->wait_detail);
#endif
return;
}
PRIV(op)->wait_for = 0;
@ -291,35 +280,25 @@ void blockstore_impl_t::check_wait(blockstore_op_t *op)
if (journal.used_start == PRIV(op)->wait_detail)
{
// do not submit
#ifdef BLOCKSTORE_DEBUG
printf("Still waiting to flush journal offset %08lx\n", PRIV(op)->wait_detail);
#endif
return;
}
flusher->release_trim();
PRIV(op)->wait_for = 0;
}
else if (PRIV(op)->wait_for == WAIT_JOURNAL_BUFFER)
{
int next = ((journal.cur_sector + 1) % journal.sector_count);
if (journal.sector_info[next].flush_count > 0 ||
if (journal.sector_info[next].usage_count > 0 ||
journal.sector_info[next].dirty)
{
// do not submit
#ifdef BLOCKSTORE_DEBUG
printf("Still waiting for a journal buffer\n");
#endif
return;
}
PRIV(op)->wait_for = 0;
}
else if (PRIV(op)->wait_for == WAIT_FREE)
{
if (!data_alloc->get_free_count() && flusher->is_active())
if (!data_alloc->get_free_count() && !flusher->is_active())
{
#ifdef BLOCKSTORE_DEBUG
printf("Still waiting for free space on the data device\n");
#endif
return;
}
PRIV(op)->wait_for = 0;
@ -330,15 +309,16 @@ void blockstore_impl_t::check_wait(blockstore_op_t *op)
}
}
void blockstore_impl_t::enqueue_op(blockstore_op_t *op)
void blockstore_impl_t::enqueue_op(blockstore_op_t *op, bool first)
{
if (op->opcode < BS_OP_MIN || op->opcode > BS_OP_MAX ||
((op->opcode == BS_OP_READ || op->opcode == BS_OP_WRITE || op->opcode == BS_OP_WRITE_STABLE) && (
((op->opcode == BS_OP_READ || op->opcode == BS_OP_WRITE) && (
op->offset >= block_size ||
op->len > block_size-op->offset ||
(op->len % disk_alignment)
)) ||
readonly && op->opcode != BS_OP_READ && op->opcode != BS_OP_LIST)
readonly && op->opcode != BS_OP_READ && op->opcode != BS_OP_LIST ||
first && op->opcode == BS_OP_WRITE)
{
// Basic verification not passed
op->retval = -EINVAL;
@ -383,215 +363,109 @@ void blockstore_impl_t::enqueue_op(blockstore_op_t *op)
}
};
}
if ((op->opcode == BS_OP_WRITE || op->opcode == BS_OP_WRITE_STABLE || op->opcode == BS_OP_DELETE) && !enqueue_write(op))
if (op->opcode == BS_OP_WRITE && !enqueue_write(op))
{
std::function<void (blockstore_op_t*)>(op->callback)(op);
return;
}
if (op->opcode == BS_OP_SYNC && immediate_commit == IMMEDIATE_ALL)
{
op->retval = 0;
std::function<void (blockstore_op_t*)>(op->callback)(op);
return;
}
// Call constructor without allocating memory. We'll call destructor before returning op back
new ((void*)op->private_data) blockstore_op_private_t;
PRIV(op)->wait_for = 0;
PRIV(op)->op_state = 0;
PRIV(op)->pending_ops = 0;
if (!first)
{
submit_queue.push_back(op);
ringloop->wakeup();
}
static bool replace_stable(object_id oid, uint64_t version, int search_start, int search_end, obj_ver_id* list)
{
while (search_start < search_end)
{
int pos = search_start+(search_end-search_start)/2;
if (oid < list[pos].oid)
{
search_end = pos;
}
else if (list[pos].oid < oid)
{
search_start = pos+1;
}
else
{
list[pos].version = version;
return true;
submit_queue.push_front(op);
}
}
return false;
ringloop->wakeup();
}
void blockstore_impl_t::process_list(blockstore_op_t *op)
{
// Count objects
uint32_t list_pg = op->offset;
uint32_t pg_count = op->len;
uint64_t pg_stripe_size = op->oid.stripe;
uint64_t min_inode = op->oid.inode;
uint64_t max_inode = op->version;
// Check PG
if (pg_count != 0 && (pg_stripe_size < MIN_BLOCK_SIZE || list_pg >= pg_count))
{
op->retval = -EINVAL;
FINISH_OP(op);
return;
}
// Copy clean_db entries (sorted)
int stable_count = 0, stable_alloc = clean_db.size() / (pg_count ? pg_count : 1);
obj_ver_id *stable = (obj_ver_id*)malloc(sizeof(obj_ver_id) * stable_alloc);
if (!stable)
uint64_t stable_count = 0;
if (pg_count > 0)
{
for (auto it = clean_db.begin(); it != clean_db.end(); it++)
{
uint32_t pg = (it->first.inode + it->first.stripe / pg_stripe_size) % pg_count;
if (pg == list_pg)
{
stable_count++;
}
}
}
else
{
stable_count = clean_db.size();
}
uint64_t total_count = stable_count;
for (auto it = dirty_db.begin(); it != dirty_db.end(); it++)
{
if (!pg_count || ((it->first.oid.inode + it->first.oid.stripe / pg_stripe_size) % pg_count) == list_pg)
{
if (IS_STABLE(it->second.state))
{
stable_count++;
}
total_count++;
}
}
// Allocate memory
op->version = stable_count;
op->retval = total_count;
op->buf = malloc(sizeof(obj_ver_id) * total_count);
if (!op->buf)
{
op->retval = -ENOMEM;
FINISH_OP(op);
return;
}
obj_ver_id *vers = (obj_ver_id*)op->buf;
int i = 0;
for (auto it = clean_db.begin(); it != clean_db.end(); it++)
{
auto clean_it = clean_db.begin(), clean_end = clean_db.end();
if ((min_inode != 0 || max_inode != 0) && min_inode <= max_inode)
if (!pg_count || ((it->first.inode + it->first.stripe / pg_stripe_size) % pg_count) == list_pg)
{
clean_it = clean_db.lower_bound({
.inode = min_inode,
.stripe = 0,
});
clean_end = clean_db.upper_bound({
.inode = max_inode,
.stripe = UINT64_MAX,
});
}
for (; clean_it != clean_end; clean_it++)
{
if (!pg_count || ((clean_it->first.stripe / pg_stripe_size) % pg_count) == list_pg) // like map_to_pg()
{
if (stable_count >= stable_alloc)
{
stable_alloc += 32768;
stable = (obj_ver_id*)realloc(stable, sizeof(obj_ver_id) * stable_alloc);
if (!stable)
{
op->retval = -ENOMEM;
FINISH_OP(op);
return;
}
}
stable[stable_count++] = {
.oid = clean_it->first,
.version = clean_it->second.version,
vers[i++] = {
.oid = it->first,
.version = it->second.version,
};
}
}
}
int clean_stable_count = stable_count;
// Copy dirty_db entries (sorted, too)
int unstable_count = 0, unstable_alloc = 0;
obj_ver_id *unstable = NULL;
int j = stable_count;
for (auto it = dirty_db.begin(); it != dirty_db.end(); it++)
{
auto dirty_it = dirty_db.begin(), dirty_end = dirty_db.end();
if ((min_inode != 0 || max_inode != 0) && min_inode <= max_inode)
if (!pg_count || ((it->first.oid.inode + it->first.oid.stripe / pg_stripe_size) % pg_count) == list_pg)
{
dirty_it = dirty_db.lower_bound({
.oid = {
.inode = min_inode,
.stripe = 0,
},
.version = 0,
});
dirty_end = dirty_db.upper_bound({
.oid = {
.inode = max_inode,
.stripe = UINT64_MAX,
},
.version = UINT64_MAX,
});
}
for (; dirty_it != dirty_end; dirty_it++)
if (IS_STABLE(it->second.state))
{
if (!pg_count || ((dirty_it->first.oid.stripe / pg_stripe_size) % pg_count) == list_pg) // like map_to_pg()
{
if (IS_DELETE(dirty_it->second.state))
{
// Deletions are always stable, so try to zero out two possible entries
if (!replace_stable(dirty_it->first.oid, 0, 0, clean_stable_count, stable))
{
replace_stable(dirty_it->first.oid, 0, clean_stable_count, stable_count, stable);
}
}
else if (IS_STABLE(dirty_it->second.state))
{
// First try to replace a clean stable version in the first part of the list
if (!replace_stable(dirty_it->first.oid, dirty_it->first.version, 0, clean_stable_count, stable))
{
// Then try to replace the last dirty stable version in the second part of the list
if (stable_count > 0 && stable[stable_count-1].oid == dirty_it->first.oid)
{
stable[stable_count-1].version = dirty_it->first.version;
vers[i++] = it->first;
}
else
{
if (stable_count >= stable_alloc)
{
stable_alloc += 32768;
stable = (obj_ver_id*)realloc(stable, sizeof(obj_ver_id) * stable_alloc);
if (!stable)
{
if (unstable)
free(unstable);
op->retval = -ENOMEM;
FINISH_OP(op);
return;
}
}
stable[stable_count++] = dirty_it->first;
vers[j++] = it->first;
}
}
}
else
{
if (unstable_count >= unstable_alloc)
{
unstable_alloc += 32768;
unstable = (obj_ver_id*)realloc(unstable, sizeof(obj_ver_id) * unstable_alloc);
if (!unstable)
{
if (stable)
free(stable);
op->retval = -ENOMEM;
FINISH_OP(op);
return;
}
}
unstable[unstable_count++] = dirty_it->first;
}
}
}
}
// Remove zeroed out stable entries
int j = 0;
for (int i = 0; i < stable_count; i++)
{
if (stable[i].version != 0)
{
stable[j++] = stable[i];
}
}
stable_count = j;
if (stable_count+unstable_count > stable_alloc)
{
stable_alloc = stable_count+unstable_count;
stable = (obj_ver_id*)realloc(stable, sizeof(obj_ver_id) * stable_alloc);
if (!stable)
{
if (unstable)
free(unstable);
op->retval = -ENOMEM;
FINISH_OP(op);
return;
}
}
// Copy unstable entries
for (int i = 0; i < unstable_count; i++)
{
stable[j++] = unstable[i];
}
free(unstable);
op->version = stable_count;
op->retval = stable_count+unstable_count;
op->buf = stable;
FINISH_OP(op);
}

View File

@ -1,6 +1,3 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
#pragma once
#include "blockstore.h"
@ -9,8 +6,8 @@
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <time.h>
#include <unistd.h>
#include <malloc.h>
#include <linux/fs.h>
#include <vector>
@ -20,45 +17,56 @@
#include "cpp-btree/btree_map.h"
#include "malloc_or_die.h"
#include "allocator.h"
//#define BLOCKSTORE_DEBUG
// States are not stored on disk. Instead, they're deduced from the journal
// FIXME: Rename to BS_ST_*
#define BS_ST_SMALL_WRITE 0x01
#define BS_ST_BIG_WRITE 0x02
#define BS_ST_DELETE 0x03
#define ST_J_WAIT_BIG 1
#define ST_J_IN_FLIGHT 2
#define ST_J_SUBMITTED 3
#define ST_J_WRITTEN 4
#define ST_J_SYNCED 5
#define ST_J_STABLE 6
#define BS_ST_WAIT_DEL 0x10
#define BS_ST_WAIT_BIG 0x20
#define BS_ST_IN_FLIGHT 0x30
#define BS_ST_SUBMITTED 0x40
#define BS_ST_WRITTEN 0x50
#define BS_ST_SYNCED 0x60
#define BS_ST_STABLE 0x70
#define ST_D_IN_FLIGHT 15
#define ST_D_SUBMITTED 16
#define ST_D_WRITTEN 17
#define ST_D_SYNCED 20
#define ST_D_STABLE 21
#define BS_ST_INSTANT 0x100
#define ST_DEL_IN_FLIGHT 31
#define ST_DEL_SUBMITTED 32
#define ST_DEL_WRITTEN 33
#define ST_DEL_SYNCED 34
#define ST_DEL_STABLE 35
#define ST_CURRENT 48
#define IMMEDIATE_NONE 0
#define IMMEDIATE_SMALL 1
#define IMMEDIATE_ALL 2
#define BS_ST_TYPE_MASK 0x0F
#define BS_ST_WORKFLOW_MASK 0xF0
#define IS_IN_FLIGHT(st) (((st) & 0xF0) <= BS_ST_SUBMITTED)
#define IS_STABLE(st) (((st) & 0xF0) == BS_ST_STABLE)
#define IS_SYNCED(st) (((st) & 0xF0) >= BS_ST_SYNCED)
#define IS_JOURNAL(st) (((st) & 0x0F) == BS_ST_SMALL_WRITE)
#define IS_BIG_WRITE(st) (((st) & 0x0F) == BS_ST_BIG_WRITE)
#define IS_DELETE(st) (((st) & 0x0F) == BS_ST_DELETE)
#define IS_IN_FLIGHT(st) (st == ST_J_WAIT_BIG || st == ST_J_IN_FLIGHT || st == ST_D_IN_FLIGHT || st == ST_DEL_IN_FLIGHT || st == ST_J_SUBMITTED || st == ST_D_SUBMITTED || st == ST_DEL_SUBMITTED)
#define IS_STABLE(st) (st == ST_J_STABLE || st == ST_D_STABLE || st == ST_DEL_STABLE || st == ST_CURRENT)
#define IS_SYNCED(st) (IS_STABLE(st) || st == ST_J_SYNCED || st == ST_D_SYNCED || st == ST_DEL_SYNCED)
#define IS_JOURNAL(st) (st >= ST_J_WAIT_BIG && st <= ST_J_STABLE)
#define IS_BIG_WRITE(st) (st >= ST_D_IN_FLIGHT && st <= ST_D_STABLE)
#define IS_DELETE(st) (st >= ST_DEL_IN_FLIGHT && st <= ST_DEL_STABLE)
#define IS_UNSYNCED(st) (st >= ST_J_WAIT_BIG && st <= ST_J_WRITTEN || st >= ST_D_IN_FLIGHT && st <= ST_D_WRITTEN|| st >= ST_DEL_IN_FLIGHT && st <= ST_DEL_WRITTEN)
#define BS_SUBMIT_GET_SQE(sqe, data) \
BS_SUBMIT_GET_ONLY_SQE(sqe); \
struct ring_data_t *data = ((ring_data_t*)sqe->user_data)
#define BS_SUBMIT_GET_ONLY_SQE(sqe) \
{\
timespec now;\
clock_gettime(CLOCK_REALTIME, &now);\
printf("get_sqe %s %d %ld.%06ld\n", __FILE__, __LINE__, now.tv_sec, now.tv_nsec/1000);\
}\
struct io_uring_sqe *sqe = get_sqe();\
if (!sqe)\
{\
@ -68,6 +76,11 @@
}
#define BS_SUBMIT_GET_SQE_DECL(sqe) \
{\
timespec now;\
clock_gettime(CLOCK_REALTIME, &now);\
printf("get_sqe %s %d %ld.%06ld\n", __FILE__, __LINE__, now.tv_sec, now.tv_nsec/1000);\
}\
sqe = get_sqe();\
if (!sqe)\
{\
@ -78,25 +91,7 @@
#include "blockstore_journal.h"
// "VITAstor"
#define BLOCKSTORE_META_MAGIC 0x726F747341544956l
#define BLOCKSTORE_META_VERSION 1
// metadata header (superblock)
// FIXME: After adding the OSD superblock, add a key to metadata
// and journal headers to check if they belong to the same OSD
struct __attribute__((__packed__)) blockstore_meta_header_t
{
uint64_t zero;
uint64_t magic;
uint64_t version;
uint32_t meta_block_size;
uint32_t data_block_size;
uint32_t bitmap_granularity;
};
// 32 bytes = 24 bytes + block bitmap (4 bytes by default) + external attributes (also bitmap, 4 bytes by default)
// per "clean" entry on disk with fixed metadata tables
// 24 bytes + block bitmap per "clean" entry on disk with fixed metadata tables
// FIXME: maybe add crc32's to metadata
struct __attribute__((__packed__)) clean_disk_entry
{
@ -112,7 +107,7 @@ struct __attribute__((__packed__)) clean_entry
uint64_t location;
};
// 64 = 24 + 40 bytes per dirty entry in memory (obj_ver_id => dirty_entry)
// 56 = 24 + 32 bytes per dirty entry in memory (obj_ver_id => dirty_entry)
struct __attribute__((__packed__)) dirty_entry
{
uint32_t state;
@ -121,7 +116,6 @@ struct __attribute__((__packed__)) dirty_entry
uint32_t offset; // data offset within object (stripe)
uint32_t len; // data length
uint64_t journal_sector; // journal sector used for this entry
void* bitmap; // either external bitmap itself when it fits, or a pointer to it when it doesn't
};
// - Sync must be submitted after previous writes/deletes (not before!)
@ -174,13 +168,12 @@ struct blockstore_op_private_t
// Write
struct iovec iov_zerofill[3];
// Warning: must not have a default value here because it's written to before calling constructor in blockstore_write.cpp O_o
uint64_t real_version;
timespec tv_begin;
// Sync
std::vector<obj_ver_id> sync_big_writes, sync_small_writes;
int sync_small_checked, sync_big_checked;
std::list<blockstore_op_t*>::iterator in_progress_ptr;
int prev_sync_count;
};
// https://github.com/algorithm-ninja/cpp-btree
@ -218,18 +211,7 @@ class blockstore_impl_t
// Suitable only for server SSDs with capacitors, requires disabled data and journal fsyncs
int immediate_commit = IMMEDIATE_NONE;
bool inmemory_meta = false;
// Maximum and minimum flusher count
unsigned max_flusher_count, min_flusher_count;
// Maximum queue depth
unsigned max_write_iodepth = 128;
// Enable small (journaled) write throttling, useful for the SSD+HDD case
bool throttle_small_writes = false;
// Target data device iops, bandwidth and parallelism for throttling (100/100/1 is the default for HDD)
int throttle_target_iops = 100;
int throttle_target_mbs = 100;
int throttle_target_parallelism = 1;
// Minimum difference in microseconds between target and real execution times to throttle the response
int throttle_threshold_us = 50;
int flusher_count;
/******* END OF OPTIONS *******/
struct ring_consumer_t ring_consumer;
@ -237,9 +219,9 @@ class blockstore_impl_t
blockstore_clean_db_t clean_db;
uint8_t *clean_bitmap = NULL;
blockstore_dirty_db_t dirty_db;
std::vector<blockstore_op_t*> submit_queue;
std::list<blockstore_op_t*> submit_queue; // FIXME: funny thing is that vector is better here
std::vector<obj_ver_id> unsynced_big_writes, unsynced_small_writes;
int unsynced_big_write_count = 0;
std::list<blockstore_op_t*> in_progress_syncs; // ...and probably here, too
allocator *data_alloc = NULL;
uint8_t *zero_object;
@ -256,11 +238,10 @@ class blockstore_impl_t
struct journal_t journal;
journal_flusher_t *flusher;
int write_iodepth = 0;
bool live = false, queue_stall = false;
ring_loop_t *ringloop;
timerfd_manager_t *tfd;
int inflight_writes = 0;
bool stop_sync_submitted;
@ -280,7 +261,6 @@ class blockstore_impl_t
void open_data();
void open_meta();
void open_journal();
uint8_t* get_clean_entry_bitmap(uint64_t block_loc, int offset);
// Asynchronous init
int initialized;
@ -300,7 +280,6 @@ class blockstore_impl_t
// Write
bool enqueue_write(blockstore_op_t *op);
void cancel_all_writes(blockstore_op_t *op, blockstore_dirty_db_t::iterator dirty_it, int retval);
int dequeue_write(blockstore_op_t *op);
int dequeue_del(blockstore_op_t *op);
int continue_write(blockstore_op_t *op);
@ -308,21 +287,21 @@ class blockstore_impl_t
void handle_write_event(ring_data_t *data, blockstore_op_t *op);
// Sync
int continue_sync(blockstore_op_t *op, bool queue_has_in_progress_sync);
int dequeue_sync(blockstore_op_t *op);
void handle_sync_event(ring_data_t *data, blockstore_op_t *op);
void ack_sync(blockstore_op_t *op);
int continue_sync(blockstore_op_t *op);
void ack_one_sync(blockstore_op_t *op);
int ack_sync(blockstore_op_t *op);
// Stabilize
int dequeue_stable(blockstore_op_t *op);
int continue_stable(blockstore_op_t *op);
void mark_stable(const obj_ver_id & ov, bool forget_dirty = false);
void handle_stable_event(ring_data_t *data, blockstore_op_t *op);
void stabilize_object(object_id oid, uint64_t max_ver);
// Rollback
int dequeue_rollback(blockstore_op_t *op);
int continue_rollback(blockstore_op_t *op);
void mark_rolled_back(const obj_ver_id & ov);
void handle_rollback_event(ring_data_t *data, blockstore_op_t *op);
void erase_dirty(blockstore_dirty_db_t::iterator dirty_start, blockstore_dirty_db_t::iterator dirty_end, uint64_t clean_loc);
@ -331,7 +310,7 @@ class blockstore_impl_t
public:
blockstore_impl_t(blockstore_config_t & config, ring_loop_t *ringloop, timerfd_manager_t *tfd);
blockstore_impl_t(blockstore_config_t & config, ring_loop_t *ringloop);
~blockstore_impl_t();
// Event loop
@ -350,19 +329,13 @@ public:
bool is_stalled();
// Submission
void enqueue_op(blockstore_op_t *op);
// Simplified synchronous operation: get object bitmap & current version
int read_bitmap(object_id oid, uint64_t target_version, void *bitmap, uint64_t *result_version = NULL);
void enqueue_op(blockstore_op_t *op, bool first = false);
// Unstable writes are added here (map of object_id -> version)
std::unordered_map<object_id, uint64_t> unstable_writes;
// Space usage statistics
std::map<uint64_t, uint64_t> inode_space_stats;
inline uint32_t get_block_size() { return block_size; }
inline uint64_t get_block_count() { return block_count; }
inline uint64_t get_free_block_count() { return data_alloc->get_free_count(); }
inline uint32_t get_bitmap_granularity() { return disk_alignment; }
inline uint32_t get_disk_alignment() { return disk_alignment; }
};

View File

@ -1,22 +1,5 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
#include "blockstore_impl.h"
#define GET_SQE() \
sqe = bs->get_sqe();\
if (!sqe)\
throw std::runtime_error("io_uring is full during initialization");\
data = ((ring_data_t*)sqe->user_data)
static bool iszero(uint64_t *buf, int len)
{
for (int i = 0; i < len; i++)
if (buf[i] != 0)
return false;
return true;
}
blockstore_init_meta::blockstore_init_meta(blockstore_impl_t *bs)
{
this->bs = bs;
@ -24,7 +7,7 @@ blockstore_init_meta::blockstore_init_meta(blockstore_impl_t *bs)
void blockstore_init_meta::handle_event(ring_data_t *data)
{
if (data->res < 0)
if (data->res <= 0)
{
throw std::runtime_error(
std::string("read metadata failed at offset ") + std::to_string(metadata_read) +
@ -42,12 +25,6 @@ int blockstore_init_meta::loop()
{
if (wait_state == 1)
goto resume_1;
else if (wait_state == 2)
goto resume_2;
else if (wait_state == 3)
goto resume_3;
else if (wait_state == 4)
goto resume_4;
printf("Reading blockstore metadata\n");
if (bs->inmemory_meta)
metadata_buffer = bs->metadata_buffer;
@ -55,98 +32,22 @@ int blockstore_init_meta::loop()
metadata_buffer = memalign(MEM_ALIGNMENT, 2*bs->metadata_buf_size);
if (!metadata_buffer)
throw std::runtime_error("Failed to allocate metadata read buffer");
// Read superblock
GET_SQE();
data->iov = { metadata_buffer, bs->meta_block_size };
data->callback = [this](ring_data_t *data) { handle_event(data); };
my_uring_prep_readv(sqe, bs->meta_fd, &data->iov, 1, bs->meta_offset);
bs->ringloop->submit();
submitted = 1;
while (1)
{
resume_1:
if (submitted)
{
wait_state = 1;
return 1;
}
if (iszero((uint64_t*)metadata_buffer, bs->meta_block_size / sizeof(uint64_t)))
{
{
blockstore_meta_header_t *hdr = (blockstore_meta_header_t *)metadata_buffer;
hdr->zero = 0;
hdr->magic = BLOCKSTORE_META_MAGIC;
hdr->version = BLOCKSTORE_META_VERSION;
hdr->meta_block_size = bs->meta_block_size;
hdr->data_block_size = bs->block_size;
hdr->bitmap_granularity = bs->bitmap_granularity;
}
if (bs->readonly)
{
printf("Skipping metadata initialization because blockstore is readonly\n");
}
else
{
printf("Initializing metadata area\n");
GET_SQE();
data->iov = (struct iovec){ metadata_buffer, bs->meta_block_size };
data->callback = [this](ring_data_t *data) { handle_event(data); };
my_uring_prep_writev(sqe, bs->meta_fd, &data->iov, 1, bs->meta_offset);
bs->ringloop->submit();
submitted = 1;
resume_3:
if (submitted > 0)
{
wait_state = 3;
return 1;
}
zero_on_init = true;
}
}
else
{
blockstore_meta_header_t *hdr = (blockstore_meta_header_t *)metadata_buffer;
if (hdr->zero != 0 ||
hdr->magic != BLOCKSTORE_META_MAGIC ||
hdr->version != BLOCKSTORE_META_VERSION)
{
printf(
"Metadata is corrupt or old version.\n"
" If this is a new OSD please zero out the metadata area before starting it.\n"
" If you need to upgrade from 0.5.x please request it via the issue tracker.\n"
);
exit(1);
}
if (hdr->meta_block_size != bs->meta_block_size ||
hdr->data_block_size != bs->block_size ||
hdr->bitmap_granularity != bs->bitmap_granularity)
{
printf(
"Configuration stored in metadata superblock"
" (meta_block_size=%u, data_block_size=%u, bitmap_granularity=%u)"
" differs from OSD configuration (%lu/%u/%lu).\n",
hdr->meta_block_size, hdr->data_block_size, hdr->bitmap_granularity,
bs->meta_block_size, bs->block_size, bs->bitmap_granularity
);
exit(1);
}
}
// Skip superblock
bs->meta_offset += bs->meta_block_size;
prev_done = 0;
done_len = 0;
done_pos = 0;
metadata_read = 0;
// Read the rest of the metadata
while (1)
{
resume_2:
if (submitted)
{
wait_state = 2;
return 1;
}
if (metadata_read < bs->meta_len)
{
GET_SQE();
sqe = bs->get_sqe();
if (!sqe)
{
throw std::runtime_error("io_uring is full while trying to read metadata");
}
data = ((ring_data_t*)sqe->user_data);
data->iov = {
metadata_buffer + (bs->inmemory_meta
? metadata_read
@ -154,14 +55,7 @@ resume_1:
bs->meta_len - metadata_read > bs->metadata_buf_size ? bs->metadata_buf_size : bs->meta_len - metadata_read,
};
data->callback = [this](ring_data_t *data) { handle_event(data); };
if (!zero_on_init)
my_uring_prep_readv(sqe, bs->meta_fd, &data->iov, 1, bs->meta_offset + metadata_read);
else
{
// Fill metadata with zeroes
memset(data->iov.iov_base, 0, data->iov.iov_len);
my_uring_prep_writev(sqe, bs->meta_fd, &data->iov, 1, bs->meta_offset + metadata_read);
}
bs->ringloop->submit();
submitted = (prev == 1 ? 2 : 1);
prev = submitted;
@ -193,21 +87,6 @@ resume_1:
free(metadata_buffer);
metadata_buffer = NULL;
}
if (zero_on_init && !bs->disable_meta_fsync)
{
GET_SQE();
my_uring_prep_fsync(sqe, bs->meta_fd, IORING_FSYNC_DATASYNC);
data->iov = { 0 };
data->callback = [this](ring_data_t *data) { handle_event(data); };
submitted = 1;
bs->ringloop->submit();
resume_4:
if (submitted > 0)
{
wait_state = 4;
return 1;
}
}
return 0;
}
@ -218,7 +97,7 @@ void blockstore_init_meta::handle_entries(void* entries, unsigned count, int blo
clean_disk_entry *entry = (clean_disk_entry*)(entries + i*bs->clean_entry_size);
if (!bs->inmemory_meta && bs->clean_entry_bitmap_size)
{
memcpy(bs->clean_bitmap + (done_cnt+i)*2*bs->clean_entry_bitmap_size, &entry->bitmap, 2*bs->clean_entry_bitmap_size);
memcpy(bs->clean_bitmap + (done_cnt+i)*bs->clean_entry_bitmap_size, &entry->bitmap, bs->clean_entry_bitmap_size);
}
if (entry->oid.inode > 0)
{
@ -229,20 +108,13 @@ void blockstore_init_meta::handle_entries(void* entries, unsigned count, int blo
{
// free the previous block
#ifdef BLOCKSTORE_DEBUG
printf("Free block %lu from %lx:%lx v%lu (new location is %lu)\n",
clean_it->second.location >> block_order,
clean_it->first.inode, clean_it->first.stripe, clean_it->second.version,
done_cnt+i);
printf("Free block %lu\n", clean_it->second.location >> bs->block_order);
#endif
bs->data_alloc->set(clean_it->second.location >> block_order, false);
}
else
{
bs->inode_space_stats[entry->oid.inode] += bs->block_size;
}
entries_loaded++;
#ifdef BLOCKSTORE_DEBUG
printf("Allocate block (clean entry) %lu: %lx:%lx v%lu\n", done_cnt+i, entry->oid.inode, entry->oid.stripe, entry->version);
printf("Allocate block (clean entry) %lu: %lu:%lu v%lu\n", done_cnt+i, entry->oid.inode, entry->oid.stripe, entry->version);
#endif
bs->data_alloc->set(done_cnt+i, true);
bs->clean_db[entry->oid] = (struct clean_entry){
@ -253,7 +125,7 @@ void blockstore_init_meta::handle_entries(void* entries, unsigned count, int blo
else
{
#ifdef BLOCKSTORE_DEBUG
printf("Old clean entry %lu: %lx:%lx v%lu\n", done_cnt+i, entry->oid.inode, entry->oid.stripe, entry->version);
printf("Old clean entry %lu: %lu:%lu v%lu\n", done_cnt+i, entry->oid.inode, entry->oid.stripe, entry->version);
#endif
}
}
@ -274,6 +146,14 @@ blockstore_init_journal::blockstore_init_journal(blockstore_impl_t *bs)
};
}
bool iszero(uint64_t *buf, int len)
{
for (int i = 0; i < len; i++)
if (buf[i] != 0)
return false;
return true;
}
void blockstore_init_journal::handle_event(ring_data_t *data1)
{
if (data1->res <= 0)
@ -298,6 +178,12 @@ void blockstore_init_journal::handle_event(ring_data_t *data1)
submitted_buf = NULL;
}
#define GET_SQE() \
sqe = bs->get_sqe();\
if (!sqe)\
throw std::runtime_error("io_uring is full while trying to read journal");\
data = ((ring_data_t*)sqe->user_data)
int blockstore_init_journal::loop()
{
if (wait_state == 1)
@ -316,7 +202,11 @@ int blockstore_init_journal::loop()
goto resume_7;
printf("Reading blockstore journal\n");
if (!bs->journal.inmemory)
submitted_buf = memalign_or_die(MEM_ALIGNMENT, 2*bs->journal.block_size);
{
submitted_buf = memalign(MEM_ALIGNMENT, 2*bs->journal.block_size);
if (!submitted_buf)
throw std::bad_alloc();
}
else
submitted_buf = bs->journal.buffer;
// Read first block of the journal
@ -335,7 +225,7 @@ resume_1:
wait_state = 1;
return 1;
}
if (iszero((uint64_t*)submitted_buf, bs->journal.block_size / sizeof(uint64_t)))
if (iszero((uint64_t*)submitted_buf, 3))
{
// Journal is empty
// FIXME handle this wrapping to journal_block_size better (maybe)
@ -350,7 +240,6 @@ resume_1:
.size = sizeof(journal_entry_start),
.reserved = 0,
.journal_start = bs->journal.block_size,
.version = JOURNAL_VERSION,
};
((journal_entry_start*)submitted_buf)->crc32 = je_crc32((journal_entry*)submitted_buf);
if (bs->readonly)
@ -401,21 +290,11 @@ resume_1:
je_start = (journal_entry_start*)submitted_buf;
if (je_start->magic != JOURNAL_MAGIC ||
je_start->type != JE_START ||
je_crc32((journal_entry*)je_start) != je_start->crc32 ||
je_start->size != sizeof(journal_entry_start) && je_start->size != JE_START_LEGACY_SIZE)
je_start->size != sizeof(journal_entry_start) ||
je_crc32((journal_entry*)je_start) != je_start->crc32)
{
// Entry is corrupt
fprintf(stderr, "First entry of the journal is corrupt\n");
exit(1);
}
if (je_start->size == JE_START_LEGACY_SIZE || je_start->version != JOURNAL_VERSION)
{
fprintf(
stderr, "The code only supports journal version %d, but it is %lu on disk."
" Please use the previous version to flush the journal before upgrading OSD\n",
JOURNAL_VERSION, je_start->size == JE_START_LEGACY_SIZE ? 0 : je_start->version
);
exit(1);
throw std::runtime_error("first entry of the journal is corrupt");
}
next_free = journal_pos = bs->journal.used_start = je_start->journal_start;
if (!bs->journal.inmemory)
@ -438,7 +317,7 @@ resume_1:
if (journal_pos < bs->journal.used_start)
end = bs->journal.used_start;
if (!bs->journal.inmemory)
submitted_buf = memalign_or_die(MEM_ALIGNMENT, JOURNAL_BUFFER_SIZE);
submitted_buf = memalign(MEM_ALIGNMENT, JOURNAL_BUFFER_SIZE);
else
submitted_buf = bs->journal.buffer + journal_pos;
data->iov = {
@ -521,22 +400,11 @@ resume_1:
}
}
}
for (auto ov: double_allocs)
{
auto dirty_it = bs->dirty_db.find(ov);
if (dirty_it != bs->dirty_db.end() &&
IS_BIG_WRITE(dirty_it->second.state) &&
dirty_it->second.location == UINT64_MAX)
{
printf("Fatal error (bug): %lx:%lx v%lu big_write journal_entry was allocated over another object\n",
dirty_it->first.oid.inode, dirty_it->first.oid.stripe, dirty_it->first.version);
exit(1);
}
}
bs->flusher->mark_trim_possible();
// Trim journal on start so we don't stall when all entries are older
bs->journal.trim();
bs->journal.dirty_start = bs->journal.next_free;
printf(
"Journal entries loaded: %lu, free journal space: %lu bytes (%08lx..%08lx is used), free blocks: %lu / %lu\n",
"Journal entries loaded: %lu, free journal space: %lu bytes (%lu..%lu is used), free blocks: %lu / %lu\n",
entries_loaded,
(bs->journal.next_free >= bs->journal.used_start
? bs->journal.len-bs->journal.block_size - (bs->journal.next_free-bs->journal.used_start)
@ -586,15 +454,10 @@ int blockstore_init_journal::handle_journal_part(void *buf, uint64_t done_pos, u
break;
}
}
if (je->type == JE_SMALL_WRITE || je->type == JE_SMALL_WRITE_INSTANT)
if (je->type == JE_SMALL_WRITE)
{
#ifdef BLOCKSTORE_DEBUG
printf(
"je_small_write%s oid=%lx:%lx ver=%lu offset=%u len=%u\n",
je->type == JE_SMALL_WRITE_INSTANT ? "_instant" : "",
je->small_write.oid.inode, je->small_write.oid.stripe, je->small_write.version,
je->small_write.offset, je->small_write.len
);
printf("je_small_write oid=%lu:%lu ver=%lu offset=%u len=%u\n", je->small_write.oid.inode, je->small_write.oid.stripe, je->small_write.version, je->small_write.offset, je->small_write.len);
#endif
// oid, version, offset, len
uint64_t prev_free = next_free;
@ -612,7 +475,7 @@ int blockstore_init_journal::handle_journal_part(void *buf, uint64_t done_pos, u
if (location != je->small_write.data_offset)
{
char err[1024];
snprintf(err, 1024, "BUG: calculated journal data offset (%08lx) != stored journal data offset (%08lx)", location, je->small_write.data_offset);
snprintf(err, 1024, "BUG: calculated journal data offset (%lu) != stored journal data offset (%lu)", location, je->small_write.data_offset);
throw std::runtime_error(err);
}
uint32_t data_crc32 = 0;
@ -664,77 +527,27 @@ int blockstore_init_journal::handle_journal_part(void *buf, uint64_t done_pos, u
.oid = je->small_write.oid,
.version = je->small_write.version,
};
void *bmp = NULL;
void *bmp_from = (void*)je + sizeof(journal_entry_small_write);
if (bs->clean_entry_bitmap_size <= sizeof(void*))
{
memcpy(&bmp, bmp_from, bs->clean_entry_bitmap_size);
}
else
{
// FIXME Using large blockstore objects will result in a lot of small
// allocations for entry bitmaps. This can only be fixed by using
// a patched map with dynamic entry size, but not the btree_map,
// because it doesn't keep iterators valid all the time.
bmp = malloc_or_die(bs->clean_entry_bitmap_size);
memcpy(bmp, bmp_from, bs->clean_entry_bitmap_size);
}
bs->dirty_db.emplace(ov, (dirty_entry){
.state = (BS_ST_SMALL_WRITE | BS_ST_SYNCED),
.state = ST_J_SYNCED,
.flags = 0,
.location = location,
.offset = je->small_write.offset,
.len = je->small_write.len,
.journal_sector = proc_pos,
.bitmap = bmp,
});
bs->journal.used_sectors[proc_pos]++;
#ifdef BLOCKSTORE_DEBUG
printf(
"journal offset %08lx is used by %lx:%lx v%lu (%lu refs)\n",
proc_pos, ov.oid.inode, ov.oid.stripe, ov.version, bs->journal.used_sectors[proc_pos]
);
printf("journal offset %lu is used by %lu:%lu v%lu\n", proc_pos, ov.oid.inode, ov.oid.stripe, ov.version);
#endif
auto & unstab = bs->unstable_writes[ov.oid];
unstab = unstab < ov.version ? ov.version : unstab;
if (je->type == JE_SMALL_WRITE_INSTANT)
{
bs->mark_stable(ov, true);
}
}
}
else if (je->type == JE_BIG_WRITE || je->type == JE_BIG_WRITE_INSTANT)
else if (je->type == JE_BIG_WRITE)
{
#ifdef BLOCKSTORE_DEBUG
printf(
"je_big_write%s oid=%lx:%lx ver=%lu loc=%lu\n",
je->type == JE_BIG_WRITE_INSTANT ? "_instant" : "",
je->big_write.oid.inode, je->big_write.oid.stripe, je->big_write.version, je->big_write.location >> bs->block_order
);
printf("je_big_write oid=%lu:%lu ver=%lu loc=%lu\n", je->big_write.oid.inode, je->big_write.oid.stripe, je->big_write.version, je->big_write.location);
#endif
auto dirty_it = bs->dirty_db.upper_bound((obj_ver_id){
.oid = je->big_write.oid,
.version = UINT64_MAX,
});
if (dirty_it != bs->dirty_db.begin() && bs->dirty_db.size() > 0)
{
dirty_it--;
if (dirty_it->first.oid == je->big_write.oid &&
dirty_it->first.version >= je->big_write.version &&
(dirty_it->second.state & BS_ST_TYPE_MASK) == BS_ST_DELETE)
{
// It is allowed to overwrite a deleted object with a
// version number smaller than deletion version number,
// because the presence of a BIG_WRITE entry means that
// its data and metadata are already flushed.
// We don't know if newer versions are flushed, but
// the previous delete definitely is.
// So we forget previous dirty entries, but retain the clean one.
// This feature is required for writes happening shortly
// after deletes.
erase_dirty_object(dirty_it);
}
}
auto clean_it = bs->clean_db.find(je->big_write.oid);
if (clean_it == bs->clean_db.end() ||
clean_it->second.version < je->big_write.version)
@ -744,121 +557,124 @@ int blockstore_init_journal::handle_journal_part(void *buf, uint64_t done_pos, u
.oid = je->big_write.oid,
.version = je->big_write.version,
};
void *bmp = NULL;
void *bmp_from = (void*)je + sizeof(journal_entry_big_write);
if (bs->clean_entry_bitmap_size <= sizeof(void*))
{
memcpy(&bmp, bmp_from, bs->clean_entry_bitmap_size);
}
else
{
// FIXME Using large blockstore objects will result in a lot of small
// allocations for entry bitmaps. This can only be fixed by using
// a patched map with dynamic entry size, but not the btree_map,
// because it doesn't keep iterators valid all the time.
bmp = malloc_or_die(bs->clean_entry_bitmap_size);
memcpy(bmp, bmp_from, bs->clean_entry_bitmap_size);
}
auto dirty_it = bs->dirty_db.emplace(ov, (dirty_entry){
.state = (BS_ST_BIG_WRITE | BS_ST_SYNCED),
bs->dirty_db.emplace(ov, (dirty_entry){
.state = ST_D_SYNCED,
.flags = 0,
.location = je->big_write.location,
.offset = je->big_write.offset,
.len = je->big_write.len,
.journal_sector = proc_pos,
.bitmap = bmp,
}).first;
if (bs->data_alloc->get(je->big_write.location >> bs->block_order))
{
// This is probably a big_write that's already flushed and freed, but it may
// also indicate a bug. So we remember such entries and recheck them afterwards.
// If it's not a bug they won't be present after reading the whole journal.
dirty_it->second.location = UINT64_MAX;
double_allocs.push_back(ov);
}
else
{
});
#ifdef BLOCKSTORE_DEBUG
printf(
"Allocate block (journal) %lu: %lx:%lx v%lu\n",
je->big_write.location >> bs->block_order,
ov.oid.inode, ov.oid.stripe, ov.version
);
printf("Allocate block %lu\n", je->big_write.location >> bs->block_order);
#endif
bs->data_alloc->set(je->big_write.location >> bs->block_order, true);
}
bs->journal.used_sectors[proc_pos]++;
#ifdef BLOCKSTORE_DEBUG
printf(
"journal offset %08lx is used by %lx:%lx v%lu (%lu refs)\n",
proc_pos, ov.oid.inode, ov.oid.stripe, ov.version, bs->journal.used_sectors[proc_pos]
);
#endif
auto & unstab = bs->unstable_writes[ov.oid];
unstab = unstab < ov.version ? ov.version : unstab;
if (je->type == JE_BIG_WRITE_INSTANT)
{
bs->mark_stable(ov, true);
}
}
}
else if (je->type == JE_STABLE)
{
#ifdef BLOCKSTORE_DEBUG
printf("je_stable oid=%lx:%lx ver=%lu\n", je->stable.oid.inode, je->stable.oid.stripe, je->stable.version);
printf("je_stable oid=%lu:%lu ver=%lu\n", je->stable.oid.inode, je->stable.oid.stripe, je->stable.version);
#endif
// oid, version
obj_ver_id ov = {
.oid = je->stable.oid,
.version = je->stable.version,
};
bs->mark_stable(ov, true);
auto it = bs->dirty_db.find(ov);
if (it == bs->dirty_db.end())
{
// journal contains a legitimate STABLE entry for a non-existing dirty write
// this probably means that journal was trimmed between WRITE and STABLE entries
// skip it
}
else
{
while (1)
{
it->second.state = (it->second.state == ST_D_SYNCED
? ST_D_STABLE
: (it->second.state == ST_DEL_SYNCED ? ST_DEL_STABLE : ST_J_STABLE));
if (it == bs->dirty_db.begin())
break;
it--;
if (it->first.oid != ov.oid || IS_STABLE(it->second.state))
break;
}
bs->flusher->enqueue_flush(ov);
}
auto unstab_it = bs->unstable_writes.find(ov.oid);
if (unstab_it != bs->unstable_writes.end() && unstab_it->second <= ov.version)
{
bs->unstable_writes.erase(unstab_it);
}
}
else if (je->type == JE_ROLLBACK)
{
#ifdef BLOCKSTORE_DEBUG
printf("je_rollback oid=%lx:%lx ver=%lu\n", je->rollback.oid.inode, je->rollback.oid.stripe, je->rollback.version);
printf("je_rollback oid=%lu:%lu ver=%lu\n", je->rollback.oid.inode, je->rollback.oid.stripe, je->rollback.version);
#endif
// rollback dirty writes of <oid> up to <version>
obj_ver_id ov = {
auto it = bs->dirty_db.lower_bound((obj_ver_id){
.oid = je->rollback.oid,
.version = je->rollback.version,
};
bs->mark_rolled_back(ov);
.version = UINT64_MAX,
});
if (it != bs->dirty_db.begin())
{
uint64_t max_unstable = 0;
auto rm_start = it;
auto rm_end = it;
it--;
while (it->first.oid == je->rollback.oid &&
it->first.version > je->rollback.version &&
!IS_IN_FLIGHT(it->second.state) &&
!IS_STABLE(it->second.state))
{
if (it->first.oid != je->rollback.oid)
break;
else if (it->first.version <= je->rollback.version)
{
if (!IS_STABLE(it->second.state))
max_unstable = it->first.version;
break;
}
else if (IS_STABLE(it->second.state))
break;
// Remove entry
rm_start = it;
if (it == bs->dirty_db.begin())
break;
it--;
}
if (rm_start != rm_end)
{
bs->erase_dirty(rm_start, rm_end, UINT64_MAX);
}
auto unstab_it = bs->unstable_writes.find(je->rollback.oid);
if (unstab_it != bs->unstable_writes.end())
{
if (max_unstable == 0)
bs->unstable_writes.erase(unstab_it);
else
unstab_it->second = max_unstable;
}
}
}
else if (je->type == JE_DELETE)
{
#ifdef BLOCKSTORE_DEBUG
printf("je_delete oid=%lx:%lx ver=%lu\n", je->del.oid.inode, je->del.oid.stripe, je->del.version);
printf("je_delete oid=%lu:%lu ver=%lu\n", je->del.oid.inode, je->del.oid.stripe, je->del.version);
#endif
bool dirty_exists = false;
auto dirty_it = bs->dirty_db.upper_bound((obj_ver_id){
.oid = je->del.oid,
.version = UINT64_MAX,
});
if (dirty_it != bs->dirty_db.begin())
{
dirty_it--;
dirty_exists = dirty_it->first.oid == je->del.oid;
}
auto clean_it = bs->clean_db.find(je->del.oid);
bool clean_exists = (clean_it != bs->clean_db.end() &&
clean_it->second.version < je->del.version);
if (!clean_exists && dirty_exists)
{
// Clean entry doesn't exist. This means that the delete is already flushed.
// So we must not flush this object anymore.
erase_dirty_object(dirty_it);
}
else if (clean_exists || dirty_exists)
{
// oid, version
obj_ver_id ov = {
.oid = je->del.oid,
.version = je->del.version,
};
bs->dirty_db.emplace(ov, (dirty_entry){
.state = (BS_ST_DELETE | BS_ST_SYNCED),
.state = ST_DEL_SYNCED,
.flags = 0,
.location = 0,
.offset = 0,
@ -866,11 +682,6 @@ int blockstore_init_journal::handle_journal_part(void *buf, uint64_t done_pos, u
.journal_sector = proc_pos,
});
bs->journal.used_sectors[proc_pos]++;
// Deletions are treated as immediately stable, because
// "2-phase commit" (write->stabilize) isn't sufficient for them anyway
bs->mark_stable(ov, true);
}
// Ignore delete if neither preceding dirty entries nor the clean one are present
}
started = true;
pos += je->size;
@ -881,35 +692,3 @@ int blockstore_init_journal::handle_journal_part(void *buf, uint64_t done_pos, u
bs->journal.next_free = next_free;
return 1;
}
void blockstore_init_journal::erase_dirty_object(blockstore_dirty_db_t::iterator dirty_it)
{
auto oid = dirty_it->first.oid;
bool exists = !IS_DELETE(dirty_it->second.state);
auto dirty_end = dirty_it;
dirty_end++;
while (1)
{
if (dirty_it == bs->dirty_db.begin())
{
break;
}
dirty_it--;
if (dirty_it->first.oid != oid)
{
dirty_it++;
break;
}
}
auto clean_it = bs->clean_db.find(oid);
uint64_t clean_loc = clean_it != bs->clean_db.end()
? clean_it->second.location : UINT64_MAX;
if (exists && clean_loc == UINT64_MAX)
{
bs->inode_space_stats[oid.inode] -= bs->block_size;
}
bs->erase_dirty(dirty_it, dirty_end, clean_loc);
// Remove it from the flusher's queue, too
// Otherwise it may end up referring to a small unstable write after reading the rest of the journal
bs->flusher->remove_flush(oid);
}

View File

@ -1,13 +1,9 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
#pragma once
class blockstore_init_meta
{
blockstore_impl_t *bs;
int wait_state = 0, wait_count = 0;
bool zero_on_init = false;
void *metadata_buffer = NULL;
uint64_t metadata_read = 0;
int prev = 0, prev_done = 0, done_len = 0, submitted = 0;
@ -37,7 +33,6 @@ class blockstore_init_journal
bool started = false;
uint64_t next_free;
std::vector<bs_init_journal_done> done;
std::vector<obj_ver_id> double_allocs;
uint64_t journal_pos = 0;
uint64_t continue_pos = 0;
void *init_write_buf = NULL;
@ -50,7 +45,6 @@ class blockstore_init_journal
std::function<void(ring_data_t*)> simple_callback;
int handle_journal_part(void *buf, uint64_t done_pos, uint64_t len);
void handle_event(ring_data_t *data);
void erase_dirty_object(blockstore_dirty_db_t::iterator dirty_it);
public:
blockstore_init_journal(blockstore_impl_t* bs);
int loop();

View File

@ -1,12 +1,9 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
#include "blockstore_impl.h"
blockstore_journal_check_t::blockstore_journal_check_t(blockstore_impl_t *bs)
{
this->bs = bs;
sectors_to_write = 0;
sectors_required = 0;
next_pos = bs->journal.next_free;
next_sector = bs->journal.cur_sector;
first_sector = -1;
@ -20,26 +17,21 @@ int blockstore_journal_check_t::check_available(blockstore_op_t *op, int entries
int required = entries_required;
while (1)
{
int fits = bs->journal.no_same_sector_overwrites && next_pos == bs->journal.next_free && bs->journal.sector_info[next_sector].written
? 0
: (bs->journal.block_size - next_in_pos) / size;
int fits = (bs->journal.block_size - next_in_pos) / size;
if (fits > 0)
{
if (fits > required)
{
fits = required;
}
if (first_sector == -1)
{
first_sector = next_sector;
}
required -= fits;
next_in_pos += fits * size;
sectors_to_write++;
sectors_required++;
}
else if (bs->journal.sector_info[next_sector].dirty)
{
sectors_to_write++;
// sectors_required is more like "sectors to write"
sectors_required++;
}
if (required <= 0)
{
@ -62,7 +54,7 @@ int blockstore_journal_check_t::check_available(blockstore_op_t *op, int entries
" is too small for a batch of "+std::to_string(entries_required)+" entries of "+std::to_string(size)+" bytes"
);
}
if (bs->journal.sector_info[next_sector].flush_count > 0 ||
if (bs->journal.sector_info[next_sector].usage_count > 0 ||
bs->journal.sector_info[next_sector].dirty)
{
// No memory buffer available. Wait for it.
@ -74,18 +66,17 @@ int blockstore_journal_check_t::check_available(blockstore_op_t *op, int entries
dirty++;
used++;
}
if (bs->journal.sector_info[i].flush_count > 0)
if (bs->journal.sector_info[i].usage_count > 0)
{
used++;
}
}
// In fact, it's even more rare than "ran out of journal space", so print a warning
printf(
"Ran out of journal sector buffers: %d/%lu buffers used (%d dirty), next buffer (%ld)"
" is %s and flushed %lu times. Consider increasing \'journal_sector_buffer_count\'\n",
"Ran out of journal sector buffers: %d/%lu buffers used (%d dirty), next buffer (%ld) is %s and flushed %lu times\n",
used, bs->journal.sector_count, dirty, next_sector,
bs->journal.sector_info[next_sector].dirty ? "dirty" : "not dirty",
bs->journal.sector_info[next_sector].flush_count
bs->journal.sector_info[next_sector].usage_count
);
PRIV(op)->wait_for = WAIT_JOURNAL_BUFFER;
return 0;
@ -104,11 +95,13 @@ int blockstore_journal_check_t::check_available(blockstore_op_t *op, int entries
{
// No space in the journal. Wait until used_start changes.
printf(
"Ran out of journal space (used_start=%08lx, next_free=%08lx, dirty_start=%08lx)\n",
bs->journal.used_start, bs->journal.next_free, bs->journal.dirty_start
"Ran out of journal space (free space: %lu bytes)\n",
(bs->journal.next_free >= bs->journal.used_start
? bs->journal.len-bs->journal.block_size - (bs->journal.next_free-bs->journal.used_start)
: bs->journal.used_start - bs->journal.next_free)
);
PRIV(op)->wait_for = WAIT_JOURNAL;
bs->flusher->request_trim();
bs->flusher->force_start();
PRIV(op)->wait_detail = bs->journal.used_start;
return 0;
}
@ -117,21 +110,20 @@ int blockstore_journal_check_t::check_available(blockstore_op_t *op, int entries
journal_entry* prefill_single_journal_entry(journal_t & journal, uint16_t type, uint32_t size)
{
if (!journal.entry_fits(size))
if (journal.block_size - journal.in_sector_pos < size)
{
assert(!journal.sector_info[journal.cur_sector].dirty);
// Move to the next journal sector
if (journal.sector_info[journal.cur_sector].flush_count > 0)
if (journal.sector_info[journal.cur_sector].usage_count > 0)
{
// Also select next sector buffer in memory
journal.cur_sector = ((journal.cur_sector + 1) % journal.sector_count);
assert(!journal.sector_info[journal.cur_sector].flush_count);
assert(!journal.sector_info[journal.cur_sector].usage_count);
}
else
{
journal.dirty_start = journal.next_free;
}
journal.sector_info[journal.cur_sector].written = false;
journal.sector_info[journal.cur_sector].offset = journal.next_free;
journal.in_sector_pos = 0;
journal.next_free = (journal.next_free+journal.block_size) < journal.len ? journal.next_free + journal.block_size : journal.block_size;
@ -156,8 +148,7 @@ journal_entry* prefill_single_journal_entry(journal_t & journal, uint16_t type,
void prepare_journal_sector_write(journal_t & journal, int cur_sector, io_uring_sqe *sqe, std::function<void(ring_data_t*)> cb)
{
journal.sector_info[cur_sector].dirty = false;
journal.sector_info[cur_sector].written = true;
journal.sector_info[cur_sector].flush_count++;
journal.sector_info[cur_sector].usage_count++;
ring_data_t *data = ((ring_data_t*)sqe->user_data);
data->iov = (struct iovec){
(journal.inmemory
@ -184,13 +175,13 @@ journal_t::~journal_t()
buffer = NULL;
}
uint64_t journal_t::get_trim_pos()
bool journal_t::trim()
{
auto journal_used_it = used_sectors.lower_bound(used_start);
#ifdef BLOCKSTORE_DEBUG
printf(
"Trimming journal (used_start=%08lx, next_free=%08lx, dirty_start=%08lx, new_start=%08lx, new_refcount=%ld)\n",
used_start, next_free, dirty_start,
"Trimming journal (used_start=%08lx, next_free=%08lx, first_used=%08lx, usage_count=%08lx)\n",
used_start, next_free,
journal_used_it == used_sectors.end() ? 0 : journal_used_it->first,
journal_used_it == used_sectors.end() ? 0 : journal_used_it->second
);
@ -202,19 +193,26 @@ uint64_t journal_t::get_trim_pos()
if (journal_used_it == used_sectors.end())
{
// Journal is empty
return next_free;
used_start = next_free;
}
else
{
// next_free does not need updating during trim
return journal_used_it->first;
used_start = journal_used_it->first;
// next_free does not need updating here
}
}
else if (journal_used_it->first > used_start)
{
// Journal is cleared up to <journal_used_it>
return journal_used_it->first;
used_start = journal_used_it->first;
}
else
{
// Can't trim journal
return used_start;
return false;
}
#ifdef BLOCKSTORE_DEBUG
printf("Journal trimmed to %08lx (next_free=%08lx)\n", used_start, next_free);
#endif
return true;
}

View File

@ -1,18 +1,12 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
#pragma once
#include "crc32c.h"
#define MIN_JOURNAL_SIZE 4*1024*1024
#define JOURNAL_MAGIC 0x4A33
#define JOURNAL_VERSION 1
#define JOURNAL_BUFFER_SIZE 4*1024*1024
// We reserve some extra space for future stabilize requests during writes
// FIXME: This value should be dynamic i.e. Blockstore ideally shouldn't allow
// writing more than can be stabilized afterwards
#define JOURNAL_STABILIZE_RESERVATION 65536
// Journal entries
@ -25,9 +19,7 @@
#define JE_STABLE 0x04
#define JE_DELETE 0x05
#define JE_ROLLBACK 0x06
#define JE_SMALL_WRITE_INSTANT 0x07
#define JE_BIG_WRITE_INSTANT 0x08
#define JE_MAX 0x08
#define JE_MAX 0x06
// crc32c comes first to ease calculation and is equal to crc32()
struct __attribute__((__packed__)) journal_entry_start
@ -38,9 +30,7 @@ struct __attribute__((__packed__)) journal_entry_start
uint32_t size;
uint32_t reserved;
uint64_t journal_start;
uint64_t version;
};
#define JE_START_LEGACY_SIZE 24
struct __attribute__((__packed__)) journal_entry_small_write
{
@ -57,9 +47,6 @@ struct __attribute__((__packed__)) journal_entry_small_write
// data_offset is its offset within journal
uint64_t data_offset;
uint32_t crc32_data;
// small_write and big_write entries are followed by the "external" bitmap
// its size is dynamic and included in journal entry's <size> field
uint8_t bitmap[];
};
struct __attribute__((__packed__)) journal_entry_big_write
@ -74,9 +61,6 @@ struct __attribute__((__packed__)) journal_entry_big_write
uint32_t offset;
uint32_t len;
uint64_t location;
// small_write and big_write entries are followed by the "external" bitmap
// its size is dynamic and included in journal entry's <size> field
uint8_t bitmap[];
};
struct __attribute__((__packed__)) journal_entry_stable
@ -142,8 +126,7 @@ inline uint32_t je_crc32(journal_entry *je)
struct journal_sector_info_t
{
uint64_t offset;
uint64_t flush_count;
bool written;
uint64_t usage_count;
bool dirty;
};
@ -152,7 +135,6 @@ struct journal_t
int fd;
uint64_t device_size;
bool inmemory = false;
bool flush_journal = false;
void *buffer = NULL;
uint64_t block_size;
@ -169,7 +151,6 @@ struct journal_t
void *sector_buf = NULL;
journal_sector_info_t *sector_info = NULL;
uint64_t sector_count;
bool no_same_sector_overwrites = false;
int cur_sector = 0;
int in_sector_pos = 0;
@ -179,19 +160,13 @@ struct journal_t
~journal_t();
bool trim();
uint64_t get_trim_pos();
inline bool entry_fits(int size)
{
return !(block_size - in_sector_pos < size ||
no_same_sector_overwrites && sector_info[cur_sector].written);
}
};
struct blockstore_journal_check_t
{
blockstore_impl_t *bs;
uint64_t next_pos, next_sector, next_in_pos;
int sectors_to_write, first_sector;
int sectors_required, first_sector;
bool right_dir; // writing to the end or the beginning of the ring buffer
blockstore_journal_check_t(blockstore_impl_t *bs);

View File

@ -1,6 +1,3 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
#include <sys/file.h>
#include "blockstore_impl.h"
@ -42,11 +39,6 @@ void blockstore_impl_t::parse_config(blockstore_config_t & config)
{
disable_flock = true;
}
if (config["flush_journal"] == "true" || config["flush_journal"] == "1" || config["flush_journal"] == "yes")
{
// Only flush journal and exit
journal.flush_journal = true;
}
if (config["immediate_commit"] == "all")
{
immediate_commit = IMMEDIATE_ALL;
@ -67,23 +59,12 @@ void blockstore_impl_t::parse_config(blockstore_config_t & config)
journal_device = config["journal_device"];
journal.offset = strtoull(config["journal_offset"].c_str(), NULL, 10);
journal.sector_count = strtoull(config["journal_sector_buffer_count"].c_str(), NULL, 10);
journal.no_same_sector_overwrites = config["journal_no_same_sector_overwrites"] == "true" ||
config["journal_no_same_sector_overwrites"] == "1" || config["journal_no_same_sector_overwrites"] == "yes";
journal.inmemory = config["inmemory_journal"] != "false";
disk_alignment = strtoull(config["disk_alignment"].c_str(), NULL, 10);
journal_block_size = strtoull(config["journal_block_size"].c_str(), NULL, 10);
meta_block_size = strtoull(config["meta_block_size"].c_str(), NULL, 10);
bitmap_granularity = strtoull(config["bitmap_granularity"].c_str(), NULL, 10);
max_flusher_count = strtoull(config["max_flusher_count"].c_str(), NULL, 10);
if (!max_flusher_count)
max_flusher_count = strtoull(config["flusher_count"].c_str(), NULL, 10);
min_flusher_count = strtoull(config["min_flusher_count"].c_str(), NULL, 10);
max_write_iodepth = strtoull(config["max_write_iodepth"].c_str(), NULL, 10);
throttle_small_writes = config["throttle_small_writes"] == "true" || config["throttle_small_writes"] == "1" || config["throttle_small_writes"] == "yes";
throttle_target_iops = strtoull(config["throttle_target_iops"].c_str(), NULL, 10);
throttle_target_mbs = strtoull(config["throttle_target_mbs"].c_str(), NULL, 10);
throttle_target_parallelism = strtoull(config["throttle_target_parallelism"].c_str(), NULL, 10);
throttle_threshold_us = strtoull(config["throttle_threshold_us"].c_str(), NULL, 10);
flusher_count = strtoull(config["flusher_count"].c_str(), NULL, 10);
// Validate
if (!block_size)
{
@ -93,17 +74,9 @@ void blockstore_impl_t::parse_config(blockstore_config_t & config)
{
throw std::runtime_error("Bad block size");
}
if (!max_flusher_count)
if (!flusher_count)
{
max_flusher_count = 256;
}
if (!min_flusher_count || journal.flush_journal)
{
min_flusher_count = 1;
}
if (!max_write_iodepth)
{
max_write_iodepth = 128;
flusher_count = 32;
}
if (!disk_alignment)
{
@ -111,7 +84,7 @@ void blockstore_impl_t::parse_config(blockstore_config_t & config)
}
else if (disk_alignment % MEM_ALIGNMENT)
{
throw std::runtime_error("disk_alignment must be a multiple of "+std::to_string(MEM_ALIGNMENT));
throw std::runtime_error("disk_alingment must be a multiple of "+std::to_string(MEM_ALIGNMENT));
}
if (!journal_block_size)
{
@ -135,7 +108,7 @@ void blockstore_impl_t::parse_config(blockstore_config_t & config)
}
if (!bitmap_granularity)
{
bitmap_granularity = DEFAULT_BITMAP_GRANULARITY;
bitmap_granularity = 4096;
}
else if (bitmap_granularity % disk_alignment)
{
@ -185,25 +158,9 @@ void blockstore_impl_t::parse_config(blockstore_config_t & config)
{
throw std::runtime_error("immediate_commit=all requires disable_journal_fsync and disable_data_fsync");
}
if (!throttle_target_iops)
{
throttle_target_iops = 100;
}
if (!throttle_target_mbs)
{
throttle_target_mbs = 100;
}
if (!throttle_target_parallelism)
{
throttle_target_parallelism = 1;
}
if (!throttle_threshold_us)
{
throttle_threshold_us = 50;
}
// init some fields
clean_entry_bitmap_size = block_size / bitmap_granularity / 8;
clean_entry_size = sizeof(clean_disk_entry) + 2*clean_entry_bitmap_size;
clean_entry_size = sizeof(clean_disk_entry) + clean_entry_bitmap_size;
journal.block_size = journal_block_size;
journal.next_free = journal_block_size;
journal.used_start = journal_block_size;
@ -257,7 +214,7 @@ void blockstore_impl_t::calc_lengths()
}
// required metadata size
block_count = data_len / block_size;
meta_len = (1 + (block_count - 1 + meta_block_size / clean_entry_size) / (meta_block_size / clean_entry_size)) * meta_block_size;
meta_len = ((block_count - 1 + meta_block_size / clean_entry_size) / (meta_block_size / clean_entry_size)) * meta_block_size;
if (meta_area < meta_len)
{
throw std::runtime_error("Metadata area is too small, need at least "+std::to_string(meta_len)+" bytes");
@ -270,7 +227,7 @@ void blockstore_impl_t::calc_lengths()
}
else if (clean_entry_bitmap_size)
{
clean_bitmap = (uint8_t*)malloc(block_count * 2*clean_entry_bitmap_size);
clean_bitmap = (uint8_t*)malloc(block_count * clean_entry_bitmap_size);
if (!clean_bitmap)
throw std::runtime_error("Failed to allocate memory for the metadata sparse write bitmap");
}

View File

@ -1,6 +1,3 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
#include "blockstore_impl.h"
int blockstore_impl_t::fulfill_read_push(blockstore_op_t *op, void *buf, uint64_t offset, uint64_t len,
@ -40,7 +37,6 @@ int blockstore_impl_t::fulfill_read_push(blockstore_op_t *op, void *buf, uint64_
return 1;
}
// FIXME I've seen a bug here so I want some tests
int blockstore_impl_t::fulfill_read(blockstore_op_t *read_op, uint64_t &fulfilled, uint32_t item_start, uint32_t item_end,
uint32_t item_state, uint64_t item_version, uint64_t item_location)
{
@ -53,20 +49,8 @@ int blockstore_impl_t::fulfill_read(blockstore_op_t *read_op, uint64_t &fulfille
while (1)
{
for (; it != PRIV(read_op)->read_vec.end(); it++)
{
if (it->offset >= cur_start)
{
break;
}
else if (it->offset + it->len > cur_start)
{
cur_start = it->offset + it->len;
if (cur_start >= item_end)
{
goto endwhile;
}
}
}
if (it == PRIV(read_op)->read_vec.end() || it->offset > cur_start)
{
fulfill_read_t el = {
@ -85,30 +69,12 @@ int blockstore_impl_t::fulfill_read(blockstore_op_t *read_op, uint64_t &fulfille
}
cur_start = it->offset + it->len;
if (it == PRIV(read_op)->read_vec.end() || cur_start >= item_end)
{
break;
}
}
}
endwhile:
return 1;
}
uint8_t* blockstore_impl_t::get_clean_entry_bitmap(uint64_t block_loc, int offset)
{
uint8_t *clean_entry_bitmap;
uint64_t meta_loc = block_loc >> block_order;
if (inmemory_meta)
{
uint64_t sector = (meta_loc / (meta_block_size / clean_entry_size)) * meta_block_size;
uint64_t pos = (meta_loc % (meta_block_size / clean_entry_size));
clean_entry_bitmap = (uint8_t*)(metadata_buffer + sector + pos*clean_entry_size + sizeof(clean_disk_entry) + offset);
}
else
clean_entry_bitmap = (uint8_t*)(clean_bitmap + meta_loc*2*clean_entry_bitmap_size + offset);
return clean_entry_bitmap;
}
int blockstore_impl_t::dequeue_read(blockstore_op_t *read_op)
{
auto clean_it = clean_db.find(read_op->oid);
@ -127,7 +93,7 @@ int blockstore_impl_t::dequeue_read(blockstore_op_t *read_op)
read_op->version = 0;
read_op->retval = read_op->len;
FINISH_OP(read_op);
return 2;
return 1;
}
uint64_t fulfilled = 0;
PRIV(read_op)->pending_ops = 0;
@ -149,11 +115,6 @@ int blockstore_impl_t::dequeue_read(blockstore_op_t *read_op)
if (!result_version)
{
result_version = dirty_it->first.version;
if (read_op->bitmap)
{
void *bmp_ptr = (clean_entry_bitmap_size > sizeof(void*) ? dirty_it->second.bitmap : &dirty_it->second.bitmap);
memcpy(read_op->bitmap, bmp_ptr, clean_entry_bitmap_size);
}
}
if (!fulfill_read(read_op, fulfilled, dirty.offset, dirty.offset + dirty.len,
dirty.state, dirty_it->first.version, dirty.location + (IS_JOURNAL(dirty.state) ? 0 : dirty.offset)))
@ -175,17 +136,12 @@ int blockstore_impl_t::dequeue_read(blockstore_op_t *read_op)
if (!result_version)
{
result_version = clean_it->second.version;
if (read_op->bitmap)
{
void *bmp_ptr = get_clean_entry_bitmap(clean_it->second.location, clean_entry_bitmap_size);
memcpy(read_op->bitmap, bmp_ptr, clean_entry_bitmap_size);
}
}
if (fulfilled < read_op->len)
{
if (!clean_entry_bitmap_size)
{
if (!fulfill_read(read_op, fulfilled, 0, block_size, (BS_ST_BIG_WRITE | BS_ST_STABLE), 0, clean_it->second.location))
if (!fulfill_read(read_op, fulfilled, 0, block_size, ST_CURRENT, 0, clean_it->second.location))
{
// need to wait. undo added requests, don't dequeue op
PRIV(read_op)->read_vec.clear();
@ -194,7 +150,18 @@ int blockstore_impl_t::dequeue_read(blockstore_op_t *read_op)
}
else
{
uint8_t *clean_entry_bitmap = get_clean_entry_bitmap(clean_it->second.location, 0);
uint64_t meta_loc = clean_it->second.location >> block_order;
uint8_t *clean_entry_bitmap;
if (inmemory_meta)
{
uint64_t sector = (meta_loc / (meta_block_size / clean_entry_size)) * meta_block_size;
uint64_t pos = (meta_loc % (meta_block_size / clean_entry_size));
clean_entry_bitmap = (uint8_t*)(metadata_buffer + sector + pos*clean_entry_size + sizeof(clean_disk_entry));
}
else
{
clean_entry_bitmap = (uint8_t*)(clean_bitmap + meta_loc*clean_entry_bitmap_size);
}
uint64_t bmp_start = 0, bmp_end = 0, bmp_size = block_size/bitmap_granularity;
while (bmp_start < bmp_size)
{
@ -205,8 +172,8 @@ int blockstore_impl_t::dequeue_read(blockstore_op_t *read_op)
if (bmp_end > bmp_start)
{
// fill with zeroes
assert(fulfill_read(read_op, fulfilled, bmp_start * bitmap_granularity,
bmp_end * bitmap_granularity, (BS_ST_DELETE | BS_ST_STABLE), 0, 0));
fulfill_read(read_op, fulfilled, bmp_start * bitmap_granularity,
bmp_end * bitmap_granularity, ST_DEL_STABLE, 0, 0);
}
bmp_start = bmp_end;
while (clean_entry_bitmap[bmp_end >> 3] & (1 << (bmp_end & 0x7)) && bmp_end < bmp_size)
@ -216,8 +183,7 @@ int blockstore_impl_t::dequeue_read(blockstore_op_t *read_op)
if (bmp_end > bmp_start)
{
if (!fulfill_read(read_op, fulfilled, bmp_start * bitmap_granularity,
bmp_end * bitmap_granularity, (BS_ST_BIG_WRITE | BS_ST_STABLE), 0,
clean_it->second.location + bmp_start * bitmap_granularity))
bmp_end * bitmap_granularity, ST_CURRENT, 0, clean_it->second.location + bmp_start * bitmap_granularity))
{
// need to wait. undo added requests, don't dequeue op
PRIV(read_op)->read_vec.clear();
@ -232,7 +198,7 @@ int blockstore_impl_t::dequeue_read(blockstore_op_t *read_op)
else if (fulfilled < read_op->len)
{
// fill remaining parts with zeroes
assert(fulfill_read(read_op, fulfilled, 0, block_size, (BS_ST_DELETE | BS_ST_STABLE), 0, 0));
fulfill_read(read_op, fulfilled, 0, block_size, ST_DEL_STABLE, 0, 0);
}
assert(fulfilled == read_op->len);
read_op->version = result_version;
@ -246,10 +212,10 @@ int blockstore_impl_t::dequeue_read(blockstore_op_t *read_op)
}
read_op->retval = read_op->len;
FINISH_OP(read_op);
return 2;
return 1;
}
read_op->retval = 0;
return 2;
return 1;
}
void blockstore_impl_t::handle_read_event(ring_data_t *data, blockstore_op_t *op)
@ -268,50 +234,3 @@ void blockstore_impl_t::handle_read_event(ring_data_t *data, blockstore_op_t *op
FINISH_OP(op);
}
}
int blockstore_impl_t::read_bitmap(object_id oid, uint64_t target_version, void *bitmap, uint64_t *result_version)
{
auto dirty_it = dirty_db.upper_bound((obj_ver_id){
.oid = oid,
.version = UINT64_MAX,
});
if (dirty_it != dirty_db.begin())
dirty_it--;
if (dirty_it != dirty_db.end())
{
while (dirty_it->first.oid == oid)
{
if (target_version >= dirty_it->first.version)
{
if (result_version)
*result_version = dirty_it->first.version;
if (bitmap)
{
void *bmp_ptr = (clean_entry_bitmap_size > sizeof(void*) ? dirty_it->second.bitmap : &dirty_it->second.bitmap);
memcpy(bitmap, bmp_ptr, clean_entry_bitmap_size);
}
return 0;
}
if (dirty_it == dirty_db.begin())
break;
dirty_it--;
}
}
auto clean_it = clean_db.find(oid);
if (clean_it != clean_db.end())
{
if (result_version)
*result_version = clean_it->second.version;
if (bitmap)
{
void *bmp_ptr = get_clean_entry_bitmap(clean_it->second.location, clean_entry_bitmap_size);
memcpy(bitmap, bmp_ptr, clean_entry_bitmap_size);
}
return 0;
}
if (result_version)
*result_version = 0;
if (bitmap)
memset(bitmap, 0, clean_entry_bitmap_size);
return -ENOENT;
}

View File

@ -1,6 +1,3 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
#include "blockstore_impl.h"
int blockstore_impl_t::dequeue_rollback(blockstore_op_t *op)
@ -9,14 +6,10 @@ int blockstore_impl_t::dequeue_rollback(blockstore_op_t *op)
{
return continue_rollback(op);
}
obj_ver_id *v, *nv;
obj_ver_id* v;
int i, todo = op->len;
for (i = 0, v = (obj_ver_id*)op->buf, nv = (obj_ver_id*)op->buf; i < op->len; i++, v++, nv++)
for (i = 0, v = (obj_ver_id*)op->buf; i < op->len; i++, v++)
{
if (nv != v)
{
*nv = *v;
}
// Check that there are some versions greater than v->version (which may be zero),
// check that they're unstable, synced, and not currently written to
auto dirty_it = dirty_db.lower_bound((obj_ver_id){
@ -25,32 +18,31 @@ int blockstore_impl_t::dequeue_rollback(blockstore_op_t *op)
});
if (dirty_it == dirty_db.begin())
{
skip_ov:
// Already rolled back, skip this object version
todo--;
nv--;
continue;
if (v->version == 0)
{
// Already rolled back
// FIXME Skip this object version
}
bad_op:
op->retval = -ENOENT;
FINISH_OP(op);
return 1;
}
else
{
dirty_it--;
if (dirty_it->first.oid != v->oid || dirty_it->first.version < v->version)
{
goto skip_ov;
goto bad_op;
}
while (dirty_it->first.oid == v->oid && dirty_it->first.version > v->version)
{
if (IS_IN_FLIGHT(dirty_it->second.state))
{
// Object write is still in progress. Wait until the write request completes
return 0;
}
else if (!IS_SYNCED(dirty_it->second.state) ||
if (!IS_SYNCED(dirty_it->second.state) ||
IS_STABLE(dirty_it->second.state))
{
op->retval = -EBUSY;
FINISH_OP(op);
return 2;
return 1;
}
if (dirty_it == dirty_db.begin())
{
@ -60,14 +52,6 @@ skip_ov:
}
}
}
op->len = todo;
if (!todo)
{
// Already rolled back
op->retval = 0;
FINISH_OP(op);
return 2;
}
// Check journal space
blockstore_journal_check_t space_check(this);
if (!space_check.check_available(op, todo, sizeof(journal_entry_rollback), 0))
@ -75,38 +59,70 @@ skip_ov:
return 0;
}
// There is sufficient space. Get SQEs
struct io_uring_sqe *sqe[space_check.sectors_to_write];
for (i = 0; i < space_check.sectors_to_write; i++)
struct io_uring_sqe *sqe[space_check.sectors_required];
for (i = 0; i < space_check.sectors_required; i++)
{
BS_SUBMIT_GET_SQE_DECL(sqe[i]);
}
// Prepare and submit journal entries
auto cb = [this, op](ring_data_t *data) { handle_rollback_event(data, op); };
int s = 0, cur_sector = -1;
for (i = 0, v = (obj_ver_id*)op->buf; i < op->len; i++, v++)
{
if (!journal.entry_fits(sizeof(journal_entry_rollback)) &&
if ((journal_block_size - journal.in_sector_pos) < sizeof(journal_entry_rollback) &&
journal.sector_info[journal.cur_sector].dirty)
{
if (cur_sector == -1)
PRIV(op)->min_flushed_journal_sector = 1 + journal.cur_sector;
prepare_journal_sector_write(journal, journal.cur_sector, sqe[s++], cb);
cur_sector = journal.cur_sector;
prepare_journal_sector_write(journal, cur_sector, sqe[s++], cb);
}
for (i = 0, v = (obj_ver_id*)op->buf; i < op->len; i++, v++)
{
// FIXME This is here only for the purpose of tracking unstable_writes. Remove if not required
// FIXME ...aaaand this is similar to blockstore_init.cpp - maybe dedup it?
auto dirty_it = dirty_db.lower_bound((obj_ver_id){
.oid = v->oid,
.version = UINT64_MAX,
});
uint64_t max_unstable = 0;
while (dirty_it != dirty_db.begin())
{
dirty_it--;
if (dirty_it->first.oid != v->oid)
break;
else if (dirty_it->first.version <= v->version)
{
if (!IS_STABLE(dirty_it->second.state))
max_unstable = dirty_it->first.version;
break;
}
}
auto unstab_it = unstable_writes.find(v->oid);
if (unstab_it != unstable_writes.end())
{
if (max_unstable == 0)
unstable_writes.erase(unstab_it);
else
unstab_it->second = max_unstable;
}
journal_entry_rollback *je = (journal_entry_rollback*)
prefill_single_journal_entry(journal, JE_ROLLBACK, sizeof(journal_entry_rollback));
journal.sector_info[journal.cur_sector].dirty = false;
je->oid = v->oid;
je->version = v->version;
je->crc32 = je_crc32((journal_entry*)je);
journal.crc32_last = je->crc32;
}
prepare_journal_sector_write(journal, journal.cur_sector, sqe[s++], cb);
assert(s == space_check.sectors_to_write);
if (cur_sector != journal.cur_sector)
{
if (cur_sector == -1)
PRIV(op)->min_flushed_journal_sector = 1 + journal.cur_sector;
cur_sector = journal.cur_sector;
prepare_journal_sector_write(journal, cur_sector, sqe[s++], cb);
}
}
PRIV(op)->max_flushed_journal_sector = 1 + journal.cur_sector;
PRIV(op)->pending_ops = s;
PRIV(op)->op_state = 1;
inflight_writes++;
return 1;
}
@ -126,8 +142,11 @@ resume_2:
resume_3:
if (!disable_journal_fsync)
{
io_uring_sqe *sqe;
BS_SUBMIT_GET_SQE_DECL(sqe);
io_uring_sqe *sqe = get_sqe();
if (!sqe)
{
return 0;
}
ring_data_t *data = ((ring_data_t*)sqe->user_data);
my_uring_prep_fsync(sqe, journal.fd, IORING_FSYNC_DATASYNC);
data->iov = { 0 };
@ -142,58 +161,33 @@ resume_5:
int i;
for (i = 0, v = (obj_ver_id*)op->buf; i < op->len; i++, v++)
{
mark_rolled_back(*v);
// Erase dirty_db entries
auto rm_end = dirty_db.lower_bound((obj_ver_id){
.oid = v->oid,
.version = UINT64_MAX,
});
auto rm_start = rm_end;
assert(rm_start != dirty_db.begin());
rm_start--;
while (1)
{
if (rm_start->first.oid != v->oid || rm_start->first.version <= v->version)
{
rm_start++;
break;
}
flusher->mark_trim_possible();
if (rm_start == dirty_db.begin())
break;
rm_start--;
}
erase_dirty(rm_start, rm_end, UINT64_MAX);
}
journal.trim();
inflight_writes--;
// Acknowledge op
op->retval = 0;
FINISH_OP(op);
return 2;
}
void blockstore_impl_t::mark_rolled_back(const obj_ver_id & ov)
{
auto it = dirty_db.lower_bound((obj_ver_id){
.oid = ov.oid,
.version = UINT64_MAX,
});
if (it != dirty_db.begin())
{
uint64_t max_unstable = 0;
auto rm_start = it;
auto rm_end = it;
it--;
while (1)
{
if (it->first.oid != ov.oid)
break;
else if (it->first.version <= ov.version)
{
if (!IS_STABLE(it->second.state))
max_unstable = it->first.version;
break;
}
else if (IS_IN_FLIGHT(it->second.state) || IS_STABLE(it->second.state))
break;
// Remove entry
rm_start = it;
if (it == dirty_db.begin())
break;
it--;
}
if (rm_start != rm_end)
{
erase_dirty(rm_start, rm_end, UINT64_MAX);
auto unstab_it = unstable_writes.find(ov.oid);
if (unstab_it != unstable_writes.end())
{
if (max_unstable == 0)
unstable_writes.erase(unstab_it);
else
unstab_it->second = max_unstable;
}
}
}
return 1;
}
void blockstore_impl_t::handle_rollback_event(ring_data_t *data, blockstore_op_t *op)
@ -201,6 +195,7 @@ void blockstore_impl_t::handle_rollback_event(ring_data_t *data, blockstore_op_t
live = true;
if (data->res != data->iov.iov_len)
{
inflight_writes--;
throw std::runtime_error(
"write operation failed ("+std::to_string(data->res)+" != "+std::to_string(data->iov.iov_len)+
"). in-memory state is corrupted. AAAAAAAaaaaaaaaa!!!111"
@ -210,74 +205,35 @@ void blockstore_impl_t::handle_rollback_event(ring_data_t *data, blockstore_op_t
if (PRIV(op)->pending_ops == 0)
{
PRIV(op)->op_state++;
ringloop->wakeup();
if (!continue_rollback(op))
{
submit_queue.push_front(op);
}
}
}
void blockstore_impl_t::erase_dirty(blockstore_dirty_db_t::iterator dirty_start, blockstore_dirty_db_t::iterator dirty_end, uint64_t clean_loc)
{
if (dirty_end == dirty_start)
{
return;
}
auto dirty_it = dirty_end;
while (dirty_it != dirty_start)
{
dirty_it--;
if (IS_DELETE(dirty_it->second.state))
{
object_id oid = dirty_it->first.oid;
#ifdef BLOCKSTORE_DEBUG
printf("Unblock writes-after-delete %lx:%lx v%lx\n", oid.inode, oid.stripe, dirty_it->first.version);
#endif
dirty_it = dirty_end;
// Unblock operations blocked by delete flushing
uint32_t next_state = BS_ST_IN_FLIGHT;
while (dirty_it != dirty_db.end() && dirty_it->first.oid == oid)
{
if ((dirty_it->second.state & BS_ST_WORKFLOW_MASK) == BS_ST_WAIT_DEL)
{
dirty_it->second.state = (dirty_it->second.state & ~BS_ST_WORKFLOW_MASK) | next_state;
if (IS_BIG_WRITE(dirty_it->second.state))
{
next_state = BS_ST_WAIT_BIG;
}
}
dirty_it++;
}
dirty_it = dirty_end;
dirty_it--;
}
while (1)
{
if (IS_BIG_WRITE(dirty_it->second.state) && dirty_it->second.location != clean_loc &&
dirty_it->second.location != UINT64_MAX)
if (IS_BIG_WRITE(dirty_it->second.state) && dirty_it->second.location != clean_loc)
{
#ifdef BLOCKSTORE_DEBUG
printf("Free block %lu from %lx:%lx v%lu\n", dirty_it->second.location >> block_order,
dirty_it->first.oid.inode, dirty_it->first.oid.stripe, dirty_it->first.version);
printf("Free block %lu\n", dirty_it->second.location >> block_order);
#endif
data_alloc->set(dirty_it->second.location >> block_order, false);
}
int used = --journal.used_sectors[dirty_it->second.journal_sector];
#ifdef BLOCKSTORE_DEBUG
printf(
"remove usage of journal offset %08lx by %lx:%lx v%lu (%d refs)\n", dirty_it->second.journal_sector,
dirty_it->first.oid.inode, dirty_it->first.oid.stripe, dirty_it->first.version, used
);
printf("remove usage of journal offset %lu by %lu:%lu v%lu\n", dirty_it->second.journal_sector,
dirty_it->first.oid.inode, dirty_it->first.oid.stripe, dirty_it->first.version);
#endif
int used = --journal.used_sectors[dirty_it->second.journal_sector];
if (used == 0)
{
journal.used_sectors.erase(dirty_it->second.journal_sector);
}
if (clean_entry_bitmap_size > sizeof(void*))
{
free(dirty_it->second.bitmap);
dirty_it->second.bitmap = NULL;
}
if (dirty_it == dirty_start)
{
break;
}
dirty_it--;
}
dirty_db.erase(dirty_start, dirty_end);
}

View File

@ -1,6 +1,3 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
#include "blockstore_impl.h"
// Stabilize small write:
@ -60,24 +57,19 @@ int blockstore_impl_t::dequeue_stable(blockstore_op_t *op)
// No such object version
op->retval = -ENOENT;
FINISH_OP(op);
return 2;
return 1;
}
else
{
// Already stable
}
}
else if (IS_IN_FLIGHT(dirty_it->second.state))
{
// Object write is still in progress. Wait until the write request completes
return 0;
}
else if (!IS_SYNCED(dirty_it->second.state))
else if (IS_UNSYNCED(dirty_it->second.state))
{
// Object not synced yet. Caller must sync it first
op->retval = -EBUSY;
FINISH_OP(op);
return 2;
return 1;
}
else if (!IS_STABLE(dirty_it->second.state))
{
@ -89,7 +81,7 @@ int blockstore_impl_t::dequeue_stable(blockstore_op_t *op)
// Already stable
op->retval = 0;
FINISH_OP(op);
return 2;
return 1;
}
// Check journal space
blockstore_journal_check_t space_check(this);
@ -98,39 +90,50 @@ int blockstore_impl_t::dequeue_stable(blockstore_op_t *op)
return 0;
}
// There is sufficient space. Get SQEs
struct io_uring_sqe *sqe[space_check.sectors_to_write];
for (i = 0; i < space_check.sectors_to_write; i++)
struct io_uring_sqe *sqe[space_check.sectors_required];
for (i = 0; i < space_check.sectors_required; i++)
{
BS_SUBMIT_GET_SQE_DECL(sqe[i]);
}
// Prepare and submit journal entries
auto cb = [this, op](ring_data_t *data) { handle_stable_event(data, op); };
int s = 0, cur_sector = -1;
for (i = 0, v = (obj_ver_id*)op->buf; i < op->len; i++, v++)
{
// FIXME: Only stabilize versions that aren't stable yet
if (!journal.entry_fits(sizeof(journal_entry_stable)) &&
if ((journal_block_size - journal.in_sector_pos) < sizeof(journal_entry_stable) &&
journal.sector_info[journal.cur_sector].dirty)
{
if (cur_sector == -1)
PRIV(op)->min_flushed_journal_sector = 1 + journal.cur_sector;
prepare_journal_sector_write(journal, journal.cur_sector, sqe[s++], cb);
cur_sector = journal.cur_sector;
prepare_journal_sector_write(journal, cur_sector, sqe[s++], cb);
}
for (i = 0, v = (obj_ver_id*)op->buf; i < op->len; i++, v++)
{
// FIXME: Only stabilize versions that aren't stable yet
auto unstab_it = unstable_writes.find(v->oid);
if (unstab_it != unstable_writes.end() &&
unstab_it->second <= v->version)
{
unstable_writes.erase(unstab_it);
}
journal_entry_stable *je = (journal_entry_stable*)
prefill_single_journal_entry(journal, JE_STABLE, sizeof(journal_entry_stable));
journal.sector_info[journal.cur_sector].dirty = false;
je->oid = v->oid;
je->version = v->version;
je->crc32 = je_crc32((journal_entry*)je);
journal.crc32_last = je->crc32;
}
prepare_journal_sector_write(journal, journal.cur_sector, sqe[s++], cb);
assert(s == space_check.sectors_to_write);
if (cur_sector != journal.cur_sector)
{
if (cur_sector == -1)
PRIV(op)->min_flushed_journal_sector = 1 + journal.cur_sector;
cur_sector = journal.cur_sector;
prepare_journal_sector_write(journal, cur_sector, sqe[s++], cb);
}
}
PRIV(op)->max_flushed_journal_sector = 1 + journal.cur_sector;
PRIV(op)->pending_ops = s;
PRIV(op)->op_state = 1;
inflight_writes++;
return 1;
}
@ -150,8 +153,16 @@ resume_2:
resume_3:
if (!disable_journal_fsync)
{
io_uring_sqe *sqe;
BS_SUBMIT_GET_SQE_DECL(sqe);
{
timespec now;
clock_gettime(CLOCK_REALTIME, &now);
printf("get_sqe %s %d %ld.%06ld\n", __FILE__, __LINE__, now.tv_sec, now.tv_nsec/1000);
}
io_uring_sqe *sqe = get_sqe();
if (!sqe)
{
return 0;
}
ring_data_t *data = ((ring_data_t*)sqe->user_data);
my_uring_prep_fsync(sqe, journal.fd, IORING_FSYNC_DATASYNC);
data->iov = { 0 };
@ -168,94 +179,48 @@ resume_5:
for (i = 0, v = (obj_ver_id*)op->buf; i < op->len; i++, v++)
{
// Mark all dirty_db entries up to op->version as stable
#ifdef BLOCKSTORE_DEBUG
printf("Stabilize %lx:%lx v%lu\n", v->oid.inode, v->oid.stripe, v->version);
#endif
mark_stable(*v);
}
// Acknowledge op
op->retval = 0;
FINISH_OP(op);
return 2;
}
void blockstore_impl_t::mark_stable(const obj_ver_id & v, bool forget_dirty)
{
auto dirty_it = dirty_db.find(v);
auto dirty_it = dirty_db.find(*v);
if (dirty_it != dirty_db.end())
{
while (1)
{
bool was_stable = IS_STABLE(dirty_it->second.state);
if ((dirty_it->second.state & BS_ST_WORKFLOW_MASK) == BS_ST_SYNCED)
if (dirty_it->second.state == ST_J_SYNCED)
{
dirty_it->second.state = (dirty_it->second.state & ~BS_ST_WORKFLOW_MASK) | BS_ST_STABLE;
// Allocations and deletions are counted when they're stabilized
if (IS_BIG_WRITE(dirty_it->second.state))
{
int exists = -1;
if (dirty_it != dirty_db.begin())
{
auto prev_it = dirty_it;
prev_it--;
if (prev_it->first.oid == v.oid)
{
exists = IS_DELETE(prev_it->second.state) ? 0 : 1;
dirty_it->second.state = ST_J_STABLE;
}
}
if (exists == -1)
else if (dirty_it->second.state == ST_D_SYNCED)
{
auto clean_it = clean_db.find(v.oid);
exists = clean_it != clean_db.end() ? 1 : 0;
dirty_it->second.state = ST_D_STABLE;
}
if (!exists)
else if (dirty_it->second.state == ST_DEL_SYNCED)
{
inode_space_stats[dirty_it->first.oid.inode] += block_size;
dirty_it->second.state = ST_DEL_STABLE;
}
}
else if (IS_DELETE(dirty_it->second.state))
else if (IS_STABLE(dirty_it->second.state))
{
inode_space_stats[dirty_it->first.oid.inode] -= block_size;
}
}
if (forget_dirty && (IS_BIG_WRITE(dirty_it->second.state) ||
IS_DELETE(dirty_it->second.state)))
{
// Big write overrides all previous dirty entries
auto erase_end = dirty_it;
while (dirty_it != dirty_db.begin())
{
dirty_it--;
if (dirty_it->first.oid != v.oid)
{
dirty_it++;
break;
}
}
auto clean_it = clean_db.find(v.oid);
uint64_t clean_loc = clean_it != clean_db.end()
? clean_it->second.location : UINT64_MAX;
erase_dirty(dirty_it, erase_end, clean_loc);
break;
}
if (was_stable || dirty_it == dirty_db.begin())
if (dirty_it == dirty_db.begin())
{
break;
}
dirty_it--;
if (dirty_it->first.oid != v.oid)
if (dirty_it->first.oid != v->oid)
{
break;
}
}
flusher->enqueue_flush(v);
#ifdef BLOCKSTORE_DEBUG
printf("enqueue_flush %lu:%lu v%lu\n", v->oid.inode, v->oid.stripe, v->version);
#endif
flusher->enqueue_flush(*v);
}
auto unstab_it = unstable_writes.find(v.oid);
if (unstab_it != unstable_writes.end() &&
unstab_it->second <= v.version)
{
unstable_writes.erase(unstab_it);
}
inflight_writes--;
// Acknowledge op
op->retval = 0;
FINISH_OP(op);
return 1;
}
void blockstore_impl_t::handle_stable_event(ring_data_t *data, blockstore_op_t *op)
@ -263,6 +228,7 @@ void blockstore_impl_t::handle_stable_event(ring_data_t *data, blockstore_op_t *
live = true;
if (data->res != data->iov.iov_len)
{
inflight_writes--;
throw std::runtime_error(
"write operation failed ("+std::to_string(data->res)+" != "+std::to_string(data->iov.iov_len)+
"). in-memory state is corrupted. AAAAAAAaaaaaaaaa!!!111"
@ -272,6 +238,9 @@ void blockstore_impl_t::handle_stable_event(ring_data_t *data, blockstore_op_t *
if (PRIV(op)->pending_ops == 0)
{
PRIV(op)->op_state++;
ringloop->wakeup();
if (!continue_stable(op))
{
submit_queue.push_front(op);
}
}
}

View File

@ -1,6 +1,3 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
#include "blockstore_impl.h"
#define SYNC_HAS_SMALL 1
@ -12,19 +9,11 @@
#define SYNC_JOURNAL_SYNC_SENT 7
#define SYNC_DONE 8
int blockstore_impl_t::continue_sync(blockstore_op_t *op, bool queue_has_in_progress_sync)
int blockstore_impl_t::dequeue_sync(blockstore_op_t *op)
{
if (immediate_commit == IMMEDIATE_ALL)
{
// We can return immediately because sync is only dequeued after all previous writes
op->retval = 0;
FINISH_OP(op);
return 2;
}
if (PRIV(op)->op_state == 0)
{
stop_sync_submitted = false;
unsynced_big_write_count -= unsynced_big_writes.size();
PRIV(op)->sync_big_writes.swap(unsynced_big_writes);
PRIV(op)->sync_small_writes.swap(unsynced_small_writes);
PRIV(op)->sync_small_checked = 0;
@ -37,15 +26,34 @@ int blockstore_impl_t::continue_sync(blockstore_op_t *op, bool queue_has_in_prog
PRIV(op)->op_state = SYNC_HAS_SMALL;
else
PRIV(op)->op_state = SYNC_DONE;
// Always add sync to in_progress_syncs because we clear unsynced_big_writes and unsynced_small_writes
PRIV(op)->prev_sync_count = in_progress_syncs.size();
PRIV(op)->in_progress_ptr = in_progress_syncs.insert(in_progress_syncs.end(), op);
}
continue_sync(op);
// Always dequeue because we always add syncs to in_progress_syncs
return 1;
}
int blockstore_impl_t::continue_sync(blockstore_op_t *op)
{
auto cb = [this, op](ring_data_t *data) { handle_sync_event(data, op); };
if (PRIV(op)->op_state == SYNC_HAS_SMALL)
{
// No big writes, just fsync the journal
for (; PRIV(op)->sync_small_checked < PRIV(op)->sync_small_writes.size(); PRIV(op)->sync_small_checked++)
{
if (IS_IN_FLIGHT(dirty_db[PRIV(op)->sync_small_writes[PRIV(op)->sync_small_checked]].state))
{
// Wait for small inflight writes to complete
return 0;
}
}
if (journal.sector_info[journal.cur_sector].dirty)
{
// Write out the last journal sector if it happens to be dirty
BS_SUBMIT_GET_ONLY_SQE(sqe);
prepare_journal_sector_write(journal, journal.cur_sector, sqe, [this, op](ring_data_t *data) { handle_sync_event(data, op); });
prepare_journal_sector_write(journal, journal.cur_sector, sqe, cb);
PRIV(op)->min_flushed_journal_sector = PRIV(op)->max_flushed_journal_sector = 1 + journal.cur_sector;
PRIV(op)->pending_ops = 1;
PRIV(op)->op_state = SYNC_JOURNAL_WRITE_SENT;
@ -58,13 +66,21 @@ int blockstore_impl_t::continue_sync(blockstore_op_t *op, bool queue_has_in_prog
}
if (PRIV(op)->op_state == SYNC_HAS_BIG)
{
for (; PRIV(op)->sync_big_checked < PRIV(op)->sync_big_writes.size(); PRIV(op)->sync_big_checked++)
{
if (IS_IN_FLIGHT(dirty_db[PRIV(op)->sync_big_writes[PRIV(op)->sync_big_checked]].state))
{
// Wait for big inflight writes to complete
return 0;
}
}
// 1st step: fsync data
if (!disable_data_fsync)
{
BS_SUBMIT_GET_SQE(sqe, data);
my_uring_prep_fsync(sqe, data_fd, IORING_FSYNC_DATASYNC);
data->iov = { 0 };
data->callback = [this, op](ring_data_t *data) { handle_sync_event(data, op); };
data->callback = cb;
PRIV(op)->min_flushed_journal_sector = PRIV(op)->max_flushed_journal_sector = 0;
PRIV(op)->pending_ops = 1;
PRIV(op)->op_state = SYNC_DATA_SYNC_SENT;
@ -77,62 +93,64 @@ int blockstore_impl_t::continue_sync(blockstore_op_t *op, bool queue_has_in_prog
}
if (PRIV(op)->op_state == SYNC_DATA_SYNC_DONE)
{
for (; PRIV(op)->sync_small_checked < PRIV(op)->sync_small_writes.size(); PRIV(op)->sync_small_checked++)
{
if (IS_IN_FLIGHT(dirty_db[PRIV(op)->sync_small_writes[PRIV(op)->sync_small_checked]].state))
{
// Wait for small inflight writes to complete
return 0;
}
}
// 2nd step: Data device is synced, prepare & write journal entries
// Check space in the journal and journal memory buffers
blockstore_journal_check_t space_check(this);
if (!space_check.check_available(op, PRIV(op)->sync_big_writes.size(),
sizeof(journal_entry_big_write) + clean_entry_bitmap_size, JOURNAL_STABILIZE_RESERVATION))
if (!space_check.check_available(op, PRIV(op)->sync_big_writes.size(), sizeof(journal_entry_big_write), 0))
{
return 0;
}
// Get SQEs. Don't bother about merging, submit each journal sector as a separate request
struct io_uring_sqe *sqe[space_check.sectors_to_write];
for (int i = 0; i < space_check.sectors_to_write; i++)
struct io_uring_sqe *sqe[space_check.sectors_required];
for (int i = 0; i < space_check.sectors_required; i++)
{
BS_SUBMIT_GET_SQE_DECL(sqe[i]);
}
// Prepare and submit journal entries
auto it = PRIV(op)->sync_big_writes.begin();
int s = 0, cur_sector = -1;
while (it != PRIV(op)->sync_big_writes.end())
{
if (!journal.entry_fits(sizeof(journal_entry_big_write) + clean_entry_bitmap_size) &&
if ((journal_block_size - journal.in_sector_pos) < sizeof(journal_entry_big_write) &&
journal.sector_info[journal.cur_sector].dirty)
{
if (cur_sector == -1)
PRIV(op)->min_flushed_journal_sector = 1 + journal.cur_sector;
prepare_journal_sector_write(journal, journal.cur_sector, sqe[s++], [this, op](ring_data_t *data) { handle_sync_event(data, op); });
cur_sector = journal.cur_sector;
prepare_journal_sector_write(journal, cur_sector, sqe[s++], cb);
}
auto & dirty_entry = dirty_db.at(*it);
journal_entry_big_write *je = (journal_entry_big_write*)prefill_single_journal_entry(
journal, (dirty_entry.state & BS_ST_INSTANT) ? JE_BIG_WRITE_INSTANT : JE_BIG_WRITE,
sizeof(journal_entry_big_write) + clean_entry_bitmap_size
);
dirty_entry.journal_sector = journal.sector_info[journal.cur_sector].offset;
while (it != PRIV(op)->sync_big_writes.end())
{
journal_entry_big_write *je = (journal_entry_big_write*)
prefill_single_journal_entry(journal, JE_BIG_WRITE, sizeof(journal_entry_big_write));
dirty_db[*it].journal_sector = journal.sector_info[journal.cur_sector].offset;
journal.sector_info[journal.cur_sector].dirty = false;
journal.used_sectors[journal.sector_info[journal.cur_sector].offset]++;
#ifdef BLOCKSTORE_DEBUG
printf(
"journal offset %08lx is used by %lx:%lx v%lu (%lu refs)\n",
dirty_entry.journal_sector, it->oid.inode, it->oid.stripe, it->version,
journal.used_sectors[journal.sector_info[journal.cur_sector].offset]
);
printf("journal offset %lu is used by %lu:%lu v%lu\n", dirty_db[*it].journal_sector, it->oid.inode, it->oid.stripe, it->version);
#endif
je->oid = it->oid;
je->version = it->version;
je->offset = dirty_entry.offset;
je->len = dirty_entry.len;
je->location = dirty_entry.location;
memcpy((void*)(je+1), (clean_entry_bitmap_size > sizeof(void*)
? dirty_entry.bitmap : &dirty_entry.bitmap), clean_entry_bitmap_size);
je->offset = dirty_db[*it].offset;
je->len = dirty_db[*it].len;
je->location = dirty_db[*it].location;
je->crc32 = je_crc32((journal_entry*)je);
journal.crc32_last = je->crc32;
it++;
}
prepare_journal_sector_write(journal, journal.cur_sector, sqe[s++], [this, op](ring_data_t *data) { handle_sync_event(data, op); });
assert(s == space_check.sectors_to_write);
if (cur_sector != journal.cur_sector)
{
if (cur_sector == -1)
PRIV(op)->min_flushed_journal_sector = 1 + journal.cur_sector;
cur_sector = journal.cur_sector;
prepare_journal_sector_write(journal, cur_sector, sqe[s++], cb);
}
}
PRIV(op)->max_flushed_journal_sector = 1 + journal.cur_sector;
PRIV(op)->pending_ops = s;
PRIV(op)->op_state = SYNC_JOURNAL_WRITE_SENT;
@ -145,8 +163,7 @@ int blockstore_impl_t::continue_sync(blockstore_op_t *op, bool queue_has_in_prog
BS_SUBMIT_GET_SQE(sqe, data);
my_uring_prep_fsync(sqe, journal.fd, IORING_FSYNC_DATASYNC);
data->iov = { 0 };
data->callback = [this, op](ring_data_t *data) { handle_sync_event(data, op); };
PRIV(op)->min_flushed_journal_sector = PRIV(op)->max_flushed_journal_sector = 0;
data->callback = cb;
PRIV(op)->pending_ops = 1;
PRIV(op)->op_state = SYNC_JOURNAL_SYNC_SENT;
return 1;
@ -156,10 +173,9 @@ int blockstore_impl_t::continue_sync(blockstore_op_t *op, bool queue_has_in_prog
PRIV(op)->op_state = SYNC_DONE;
}
}
if (PRIV(op)->op_state == SYNC_DONE && !queue_has_in_progress_sync)
if (PRIV(op)->op_state == SYNC_DONE)
{
ack_sync(op);
return 2;
return ack_sync(op);
}
return 1;
}
@ -191,37 +207,59 @@ void blockstore_impl_t::handle_sync_event(ring_data_t *data, blockstore_op_t *op
else if (PRIV(op)->op_state == SYNC_JOURNAL_SYNC_SENT)
{
PRIV(op)->op_state = SYNC_DONE;
ack_sync(op);
}
else
{
throw std::runtime_error("BUG: unexpected sync op state");
}
ringloop->wakeup();
}
}
void blockstore_impl_t::ack_sync(blockstore_op_t *op)
int blockstore_impl_t::ack_sync(blockstore_op_t *op)
{
if (PRIV(op)->op_state == SYNC_DONE && PRIV(op)->prev_sync_count == 0)
{
// Remove dependency of subsequent syncs
auto it = PRIV(op)->in_progress_ptr;
int done_syncs = 1;
++it;
// Acknowledge sync
ack_one_sync(op);
while (it != in_progress_syncs.end())
{
auto & next_sync = *it++;
PRIV(next_sync)->prev_sync_count -= done_syncs;
if (PRIV(next_sync)->prev_sync_count == 0 && PRIV(next_sync)->op_state == SYNC_DONE)
{
done_syncs++;
// Acknowledge next_sync
ack_one_sync(next_sync);
}
}
return 2;
}
return 0;
}
void blockstore_impl_t::ack_one_sync(blockstore_op_t *op)
{
// Handle states
for (auto it = PRIV(op)->sync_big_writes.begin(); it != PRIV(op)->sync_big_writes.end(); it++)
{
#ifdef BLOCKSTORE_DEBUG
printf("Ack sync big %lx:%lx v%lu\n", it->oid.inode, it->oid.stripe, it->version);
printf("Ack sync big %lu:%lu v%lu\n", it->oid.inode, it->oid.stripe, it->version);
#endif
auto & unstab = unstable_writes[it->oid];
unstab = unstab < it->version ? it->version : unstab;
auto dirty_it = dirty_db.find(*it);
dirty_it->second.state = ((dirty_it->second.state & ~BS_ST_WORKFLOW_MASK) | BS_ST_SYNCED);
if (dirty_it->second.state & BS_ST_INSTANT)
{
mark_stable(dirty_it->first);
}
dirty_it->second.state = ST_D_SYNCED;
dirty_it++;
while (dirty_it != dirty_db.end() && dirty_it->first.oid == it->oid)
{
if ((dirty_it->second.state & BS_ST_WORKFLOW_MASK) == BS_ST_WAIT_BIG)
if (dirty_it->second.state == ST_J_WAIT_BIG)
{
dirty_it->second.state = (dirty_it->second.state & ~BS_ST_WORKFLOW_MASK) | BS_ST_IN_FLIGHT;
dirty_it->second.state = ST_J_IN_FLIGHT;
}
dirty_it++;
}
@ -229,25 +267,13 @@ void blockstore_impl_t::ack_sync(blockstore_op_t *op)
for (auto it = PRIV(op)->sync_small_writes.begin(); it != PRIV(op)->sync_small_writes.end(); it++)
{
#ifdef BLOCKSTORE_DEBUG
printf("Ack sync small %lx:%lx v%lu\n", it->oid.inode, it->oid.stripe, it->version);
printf("Ack sync small %lu:%lu v%lu\n", it->oid.inode, it->oid.stripe, it->version);
#endif
auto & unstab = unstable_writes[it->oid];
unstab = unstab < it->version ? it->version : unstab;
if (dirty_db[*it].state == (BS_ST_DELETE | BS_ST_WRITTEN))
{
dirty_db[*it].state = (BS_ST_DELETE | BS_ST_SYNCED);
// Deletions are treated as immediately stable
mark_stable(*it);
}
else /* (BS_ST_INSTANT?) | BS_ST_SMALL_WRITE | BS_ST_WRITTEN */
{
dirty_db[*it].state = (dirty_db[*it].state & ~BS_ST_WORKFLOW_MASK) | BS_ST_SYNCED;
if (dirty_db[*it].state & BS_ST_INSTANT)
{
mark_stable(*it);
}
}
dirty_db[*it].state = dirty_db[*it].state == ST_DEL_WRITTEN ? ST_DEL_SYNCED : ST_J_SYNCED;
}
in_progress_syncs.erase(PRIV(op)->in_progress_ptr);
op->retval = 0;
FINISH_OP(op);
}

498
blockstore_write.cpp Normal file
View File

@ -0,0 +1,498 @@
#include "blockstore_impl.h"
bool blockstore_impl_t::enqueue_write(blockstore_op_t *op)
{
// Check or assign version number
bool found = false, deleted = false, is_del = (op->opcode == BS_OP_DELETE);
bool is_inflight_big = false;
uint64_t version = 1;
if (dirty_db.size() > 0)
{
auto dirty_it = dirty_db.upper_bound((obj_ver_id){
.oid = op->oid,
.version = UINT64_MAX,
});
dirty_it--; // segfaults when dirty_db is empty
if (dirty_it != dirty_db.end() && dirty_it->first.oid == op->oid)
{
found = true;
version = dirty_it->first.version + 1;
deleted = IS_DELETE(dirty_it->second.state);
is_inflight_big = dirty_it->second.state >= ST_D_IN_FLIGHT &&
dirty_it->second.state < ST_D_SYNCED ||
dirty_it->second.state == ST_J_WAIT_BIG;
}
}
if (!found)
{
auto clean_it = clean_db.find(op->oid);
if (clean_it != clean_db.end())
{
version = clean_it->second.version + 1;
}
else
{
deleted = true;
}
}
if (op->version == 0)
{
op->version = version;
}
else if (op->version < version)
{
// Invalid version requested
op->retval = -EEXIST;
return false;
}
if (deleted && is_del)
{
// Already deleted
op->retval = 0;
return false;
}
if (is_inflight_big && !is_del && !deleted && op->len < block_size &&
immediate_commit != IMMEDIATE_ALL)
{
// Issue an additional sync so that the previous big write can reach the journal
blockstore_op_t *sync_op = new blockstore_op_t;
sync_op->opcode = BS_OP_SYNC;
sync_op->callback = [this, op](blockstore_op_t *sync_op)
{
delete sync_op;
};
enqueue_op(sync_op);
}
#ifdef BLOCKSTORE_DEBUG
if (is_del)
printf("Delete %lu:%lu v%lu\n", op->oid.inode, op->oid.stripe, op->version);
else
printf("Write %lu:%lu v%lu offset=%u len=%u\n", op->oid.inode, op->oid.stripe, op->version, op->offset, op->len);
#endif
// No strict need to add it into dirty_db here, it's just left
// from the previous implementation where reads waited for writes
dirty_db.emplace((obj_ver_id){
.oid = op->oid,
.version = op->version,
}, (dirty_entry){
.state = (uint32_t)(
is_del
? ST_DEL_IN_FLIGHT
: (op->len == block_size || deleted ? ST_D_IN_FLIGHT : (is_inflight_big ? ST_J_WAIT_BIG : ST_J_IN_FLIGHT))
),
.flags = 0,
.location = 0,
.offset = is_del ? 0 : op->offset,
.len = is_del ? 0 : op->len,
.journal_sector = 0,
});
return true;
}
// First step of the write algorithm: dequeue operation and submit initial write(s)
int blockstore_impl_t::dequeue_write(blockstore_op_t *op)
{
if (PRIV(op)->op_state)
{
return continue_write(op);
}
auto dirty_it = dirty_db.find((obj_ver_id){
.oid = op->oid,
.version = op->version,
});
if (dirty_it->second.state == ST_J_WAIT_BIG)
{
return 0;
}
else if (dirty_it->second.state == ST_D_IN_FLIGHT)
{
blockstore_journal_check_t space_check(this);
if (!space_check.check_available(op, unsynced_big_writes.size() + 1, sizeof(journal_entry_big_write), JOURNAL_STABILIZE_RESERVATION))
{
return 0;
}
// Big (redirect) write
uint64_t loc = data_alloc->find_free();
if (loc == UINT64_MAX)
{
// no space
if (flusher->is_active())
{
// hope that some space will be available after flush
PRIV(op)->wait_for = WAIT_FREE;
return 0;
}
op->retval = -ENOSPC;
FINISH_OP(op);
return 1;
}
BS_SUBMIT_GET_SQE(sqe, data);
dirty_it->second.location = loc << block_order;
dirty_it->second.state = ST_D_SUBMITTED;
#ifdef BLOCKSTORE_DEBUG
printf("Allocate block %lu\n", loc);
#endif
data_alloc->set(loc, true);
uint64_t stripe_offset = (op->offset % bitmap_granularity);
uint64_t stripe_end = (op->offset + op->len) % bitmap_granularity;
// Zero fill up to bitmap_granularity
int vcnt = 0;
if (stripe_offset)
{
PRIV(op)->iov_zerofill[vcnt++] = (struct iovec){ zero_object, stripe_offset };
}
PRIV(op)->iov_zerofill[vcnt++] = (struct iovec){ op->buf, op->len };
if (stripe_end)
{
stripe_end = bitmap_granularity - stripe_end;
PRIV(op)->iov_zerofill[vcnt++] = (struct iovec){ zero_object, stripe_end };
}
data->iov.iov_len = op->len + stripe_offset + stripe_end; // to check it in the callback
data->callback = [this, op](ring_data_t *data) { handle_write_event(data, op); };
my_uring_prep_writev(
sqe, data_fd, PRIV(op)->iov_zerofill, vcnt, data_offset + (loc << block_order) + op->offset - stripe_offset
);
PRIV(op)->pending_ops = 1;
PRIV(op)->min_flushed_journal_sector = PRIV(op)->max_flushed_journal_sector = 0;
if (immediate_commit != IMMEDIATE_ALL)
{
// Remember big write as unsynced
unsynced_big_writes.push_back((obj_ver_id){
.oid = op->oid,
.version = op->version,
});
PRIV(op)->op_state = 3;
}
else
{
PRIV(op)->op_state = 1;
}
}
else
{
// Small (journaled) write
// First check if the journal has sufficient space
blockstore_journal_check_t space_check(this);
if (unsynced_big_writes.size() && !space_check.check_available(op, unsynced_big_writes.size(), sizeof(journal_entry_big_write), 0)
|| !space_check.check_available(op, 1, sizeof(journal_entry_small_write), op->len + JOURNAL_STABILIZE_RESERVATION))
{
return 0;
}
// There is sufficient space. Get SQE(s)
struct io_uring_sqe *sqe1 = NULL;
if (immediate_commit != IMMEDIATE_NONE ||
(journal_block_size - journal.in_sector_pos) < sizeof(journal_entry_small_write) &&
journal.sector_info[journal.cur_sector].dirty)
{
// Write current journal sector only if it's dirty and full, or in the immediate_commit mode
BS_SUBMIT_GET_SQE_DECL(sqe1);
}
struct io_uring_sqe *sqe2 = NULL;
if (op->len > 0)
{
BS_SUBMIT_GET_SQE_DECL(sqe2);
}
// Got SQEs. Prepare previous journal sector write if required
auto cb = [this, op](ring_data_t *data) { handle_write_event(data, op); };
if (immediate_commit == IMMEDIATE_NONE)
{
if (sqe1)
{
prepare_journal_sector_write(journal, journal.cur_sector, sqe1, cb);
PRIV(op)->min_flushed_journal_sector = PRIV(op)->max_flushed_journal_sector = 1 + journal.cur_sector;
PRIV(op)->pending_ops++;
}
else
{
PRIV(op)->min_flushed_journal_sector = PRIV(op)->max_flushed_journal_sector = 0;
}
}
// Then pre-fill journal entry
journal_entry_small_write *je = (journal_entry_small_write*)
prefill_single_journal_entry(journal, JE_SMALL_WRITE, sizeof(journal_entry_small_write));
dirty_it->second.journal_sector = journal.sector_info[journal.cur_sector].offset;
journal.used_sectors[journal.sector_info[journal.cur_sector].offset]++;
#ifdef BLOCKSTORE_DEBUG
printf("journal offset %lu is used by %lu:%lu v%lu\n", dirty_it->second.journal_sector, dirty_it->first.oid.inode, dirty_it->first.oid.stripe, dirty_it->first.version);
#endif
// Figure out where data will be
journal.next_free = (journal.next_free + op->len) <= journal.len ? journal.next_free : journal_block_size;
je->oid = op->oid;
je->version = op->version;
je->offset = op->offset;
je->len = op->len;
je->data_offset = journal.next_free;
je->crc32_data = crc32c(0, op->buf, op->len);
je->crc32 = je_crc32((journal_entry*)je);
journal.crc32_last = je->crc32;
if (immediate_commit != IMMEDIATE_NONE)
{
prepare_journal_sector_write(journal, journal.cur_sector, sqe1, cb);
PRIV(op)->min_flushed_journal_sector = PRIV(op)->max_flushed_journal_sector = 1 + journal.cur_sector;
PRIV(op)->pending_ops++;
}
if (op->len > 0)
{
// Prepare journal data write
if (journal.inmemory)
{
// Copy data
memcpy(journal.buffer + journal.next_free, op->buf, op->len);
}
ring_data_t *data2 = ((ring_data_t*)sqe2->user_data);
data2->iov = (struct iovec){ op->buf, op->len };
data2->callback = cb;
my_uring_prep_writev(
sqe2, journal.fd, &data2->iov, 1, journal.offset + journal.next_free
);
PRIV(op)->pending_ops++;
}
else
{
// Zero-length overwrite. Allowed to bump object version in EC placement groups without actually writing data
}
dirty_it->second.location = journal.next_free;
dirty_it->second.state = ST_J_SUBMITTED;
journal.next_free += op->len;
if (journal.next_free >= journal.len)
{
journal.next_free = journal_block_size;
}
if (immediate_commit == IMMEDIATE_NONE)
{
// Remember small write as unsynced
unsynced_small_writes.push_back((obj_ver_id){
.oid = op->oid,
.version = op->version,
});
}
if (!PRIV(op)->pending_ops)
{
PRIV(op)->op_state = 4;
continue_write(op);
}
else
{
PRIV(op)->op_state = 3;
}
}
inflight_writes++;
return 1;
}
int blockstore_impl_t::continue_write(blockstore_op_t *op)
{
io_uring_sqe *sqe = NULL;
journal_entry_big_write *je;
auto dirty_it = dirty_db.find((obj_ver_id){
.oid = op->oid,
.version = op->version,
});
if (PRIV(op)->op_state == 2)
goto resume_2;
else if (PRIV(op)->op_state == 4)
goto resume_4;
else
return 1;
resume_2:
// Only for the immediate_commit mode: prepare and submit big_write journal entry
{
timespec now;
clock_gettime(CLOCK_REALTIME, &now);
printf("get_sqe %s %d %ld.%06ld\n", __FILE__, __LINE__, now.tv_sec, now.tv_nsec/1000);
}
sqe = get_sqe();
if (!sqe)
{
return 0;
}
je = (journal_entry_big_write*)prefill_single_journal_entry(journal, JE_BIG_WRITE, sizeof(journal_entry_big_write));
dirty_it->second.journal_sector = journal.sector_info[journal.cur_sector].offset;
journal.sector_info[journal.cur_sector].dirty = false;
journal.used_sectors[journal.sector_info[journal.cur_sector].offset]++;
#ifdef BLOCKSTORE_DEBUG
printf("journal offset %lu is used by %lu:%lu v%lu\n", journal.sector_info[journal.cur_sector].offset, op->oid.inode, op->oid.stripe, op->version);
#endif
je->oid = op->oid;
je->version = op->version;
je->offset = op->offset;
je->len = op->len;
je->location = dirty_it->second.location;
je->crc32 = je_crc32((journal_entry*)je);
journal.crc32_last = je->crc32;
prepare_journal_sector_write(journal, journal.cur_sector, sqe,
[this, op](ring_data_t *data) { handle_write_event(data, op); });
PRIV(op)->min_flushed_journal_sector = PRIV(op)->max_flushed_journal_sector = 1 + journal.cur_sector;
PRIV(op)->pending_ops = 1;
PRIV(op)->op_state = 3;
return 1;
resume_4:
// Switch object state
{
timespec now;
clock_gettime(CLOCK_REALTIME, &now);
printf("write_done %s %d %ld.%06ld\n", __FILE__, __LINE__, now.tv_sec, now.tv_nsec/1000);
}
#ifdef BLOCKSTORE_DEBUG
printf("Ack write %lu:%lu v%lu = %d\n", op->oid.inode, op->oid.stripe, op->version, dirty_it->second.state);
#endif
bool imm = dirty_it->second.state == ST_D_SUBMITTED
? (immediate_commit == IMMEDIATE_ALL)
: (immediate_commit != IMMEDIATE_NONE);
if (imm)
{
auto & unstab = unstable_writes[op->oid];
unstab = unstab < op->version ? op->version : unstab;
}
if (dirty_it->second.state == ST_J_SUBMITTED)
{
dirty_it->second.state = imm ? ST_J_SYNCED : ST_J_WRITTEN;
}
else if (dirty_it->second.state == ST_D_SUBMITTED)
{
dirty_it->second.state = imm ? ST_D_SYNCED : ST_D_WRITTEN;
}
else if (dirty_it->second.state == ST_DEL_SUBMITTED)
{
dirty_it->second.state = imm ? ST_DEL_SYNCED : ST_DEL_WRITTEN;
}
if (immediate_commit == IMMEDIATE_ALL)
{
dirty_it++;
while (dirty_it != dirty_db.end() && dirty_it->first.oid == op->oid)
{
if (dirty_it->second.state == ST_J_WAIT_BIG)
{
dirty_it->second.state = ST_J_IN_FLIGHT;
}
dirty_it++;
}
}
inflight_writes--;
// Acknowledge write
op->retval = op->len;
FINISH_OP(op);
return 1;
}
void blockstore_impl_t::handle_write_event(ring_data_t *data, blockstore_op_t *op)
{
live = true;
if (data->res != data->iov.iov_len)
{
inflight_writes--;
// FIXME: our state becomes corrupted after a write error. maybe do something better than just die
throw std::runtime_error(
"write operation failed ("+std::to_string(data->res)+" != "+std::to_string(data->iov.iov_len)+
"). in-memory state is corrupted. AAAAAAAaaaaaaaaa!!!111"
);
}
PRIV(op)->pending_ops--;
if (PRIV(op)->pending_ops == 0)
{
release_journal_sectors(op);
PRIV(op)->op_state++;
if (!continue_write(op))
{
submit_queue.push_front(op);
}
}
}
void blockstore_impl_t::release_journal_sectors(blockstore_op_t *op)
{
// Release flushed journal sectors
if (PRIV(op)->min_flushed_journal_sector > 0 &&
PRIV(op)->max_flushed_journal_sector > 0)
{
uint64_t s = PRIV(op)->min_flushed_journal_sector;
while (1)
{
journal.sector_info[s-1].usage_count--;
if (s != (1+journal.cur_sector) && journal.sector_info[s-1].usage_count == 0)
{
// We know for sure that we won't write into this sector anymore
uint64_t new_ds = journal.sector_info[s-1].offset + journal.block_size;
if ((journal.dirty_start + (journal.dirty_start >= journal.used_start ? 0 : journal.len)) <
(new_ds + (new_ds >= journal.used_start ? 0 : journal.len)))
{
journal.dirty_start = new_ds;
}
}
if (s == PRIV(op)->max_flushed_journal_sector)
break;
s = 1 + s % journal.sector_count;
}
PRIV(op)->min_flushed_journal_sector = PRIV(op)->max_flushed_journal_sector = 0;
}
}
int blockstore_impl_t::dequeue_del(blockstore_op_t *op)
{
auto dirty_it = dirty_db.find((obj_ver_id){
.oid = op->oid,
.version = op->version,
});
blockstore_journal_check_t space_check(this);
if (!space_check.check_available(op, 1, sizeof(journal_entry_del), 0))
{
return 0;
}
io_uring_sqe *sqe = NULL;
if (immediate_commit != IMMEDIATE_NONE ||
(journal_block_size - journal.in_sector_pos) < sizeof(journal_entry_del) &&
journal.sector_info[journal.cur_sector].dirty)
{
// Write current journal sector only if it's dirty and full, or in the immediate_commit mode
BS_SUBMIT_GET_SQE_DECL(sqe);
}
auto cb = [this, op](ring_data_t *data) { handle_write_event(data, op); };
// Prepare journal sector write
if (immediate_commit == IMMEDIATE_NONE)
{
if (sqe)
{
prepare_journal_sector_write(journal, journal.cur_sector, sqe, cb);
PRIV(op)->min_flushed_journal_sector = PRIV(op)->max_flushed_journal_sector = 1 + journal.cur_sector;
PRIV(op)->pending_ops++;
}
else
{
PRIV(op)->min_flushed_journal_sector = PRIV(op)->max_flushed_journal_sector = 0;
}
}
// Pre-fill journal entry
journal_entry_del *je = (journal_entry_del*)
prefill_single_journal_entry(journal, JE_DELETE, sizeof(struct journal_entry_del));
dirty_it->second.journal_sector = journal.sector_info[journal.cur_sector].offset;
journal.used_sectors[journal.sector_info[journal.cur_sector].offset]++;
#ifdef BLOCKSTORE_DEBUG
printf("journal offset %lu is used by %lu:%lu v%lu\n", dirty_it->second.journal_sector, dirty_it->first.oid.inode, dirty_it->first.oid.stripe, dirty_it->first.version);
#endif
je->oid = op->oid;
je->version = op->version;
je->crc32 = je_crc32((journal_entry*)je);
journal.crc32_last = je->crc32;
dirty_it->second.state = ST_DEL_SUBMITTED;
if (immediate_commit != IMMEDIATE_NONE)
{
prepare_journal_sector_write(journal, journal.cur_sector, sqe, cb);
PRIV(op)->min_flushed_journal_sector = PRIV(op)->max_flushed_journal_sector = 1 + journal.cur_sector;
PRIV(op)->pending_ops++;
// Remember small write as unsynced
unsynced_small_writes.push_back((obj_ver_id){
.oid = op->oid,
.version = op->version,
});
}
if (!PRIV(op)->pending_ops)
{
PRIV(op)->op_state = 4;
continue_write(op);
}
else
{
PRIV(op)->op_state = 3;
}
return 1;
}

357
cluster_client.cpp Normal file
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#include <unistd.h>
#include <fcntl.h>
#include <sys/socket.h>
#include <sys/epoll.h>
#include <netinet/tcp.h>
#include "cluster_client.h"
osd_op_t::~osd_op_t()
{
assert(!bs_op);
if (op_data)
{
free(op_data);
}
if (rmw_buf)
{
free(rmw_buf);
}
if (buf)
{
// Note: reusing osd_op_t WILL currently lead to memory leaks
// So we don't reuse it, but free it every time
free(buf);
}
}
void cluster_client_t::connect_peer(uint64_t peer_osd, json11::Json address_list, int port)
{
if (wanted_peers.find(peer_osd) == wanted_peers.end())
{
wanted_peers[peer_osd] = (osd_wanted_peer_t){
.address_list = address_list,
.port = port,
};
}
else
{
wanted_peers[peer_osd].address_list = address_list;
wanted_peers[peer_osd].port = port;
}
wanted_peers[peer_osd].address_changed = true;
if (!wanted_peers[peer_osd].connecting &&
(time(NULL) - wanted_peers[peer_osd].last_connect_attempt) >= peer_connect_interval)
{
try_connect_peer(peer_osd);
}
}
void cluster_client_t::try_connect_peer(uint64_t peer_osd)
{
auto wp_it = wanted_peers.find(peer_osd);
if (wp_it == wanted_peers.end())
{
return;
}
if (osd_peer_fds.find(peer_osd) != osd_peer_fds.end())
{
wanted_peers.erase(peer_osd);
return;
}
auto & wp = wp_it->second;
if (wp.address_index >= wp.address_list.array_items().size())
{
return;
}
wp.cur_addr = wp.address_list[wp.address_index].string_value();
wp.cur_port = wp.port;
try_connect_peer_addr(peer_osd, wp.cur_addr.c_str(), wp.cur_port);
}
void cluster_client_t::try_connect_peer_addr(osd_num_t peer_osd, const char *peer_host, int peer_port)
{
struct sockaddr_in addr;
int r;
if ((r = inet_pton(AF_INET, peer_host, &addr.sin_addr)) != 1)
{
on_connect_peer(peer_osd, -EINVAL);
return;
}
addr.sin_family = AF_INET;
addr.sin_port = htons(peer_port ? peer_port : 11203);
int peer_fd = socket(AF_INET, SOCK_STREAM, 0);
if (peer_fd < 0)
{
on_connect_peer(peer_osd, -errno);
return;
}
fcntl(peer_fd, F_SETFL, fcntl(peer_fd, F_GETFL, 0) | O_NONBLOCK);
int timeout_id = -1;
if (peer_connect_timeout > 0)
{
timeout_id = tfd->set_timer(1000*peer_connect_timeout, false, [this, peer_fd](int timer_id)
{
osd_num_t peer_osd = clients[peer_fd].osd_num;
stop_client(peer_fd);
on_connect_peer(peer_osd, -EIO);
return;
});
}
r = connect(peer_fd, (sockaddr*)&addr, sizeof(addr));
if (r < 0 && errno != EINPROGRESS)
{
close(peer_fd);
on_connect_peer(peer_osd, -errno);
return;
}
assert(peer_osd != this->osd_num);
clients[peer_fd] = (osd_client_t){
.peer_addr = addr,
.peer_port = peer_port,
.peer_fd = peer_fd,
.peer_state = PEER_CONNECTING,
.connect_timeout_id = timeout_id,
.osd_num = peer_osd,
.in_buf = malloc(receive_buffer_size),
};
tfd->set_fd_handler(peer_fd, true, [this](int peer_fd, int epoll_events)
{
// Either OUT (connected) or HUP
handle_connect_epoll(peer_fd);
});
}
void cluster_client_t::handle_connect_epoll(int peer_fd)
{
auto & cl = clients[peer_fd];
if (cl.connect_timeout_id >= 0)
{
tfd->clear_timer(cl.connect_timeout_id);
cl.connect_timeout_id = -1;
}
osd_num_t peer_osd = cl.osd_num;
int result = 0;
socklen_t result_len = sizeof(result);
if (getsockopt(peer_fd, SOL_SOCKET, SO_ERROR, &result, &result_len) < 0)
{
result = errno;
}
if (result != 0)
{
stop_client(peer_fd);
on_connect_peer(peer_osd, -result);
return;
}
int one = 1;
setsockopt(peer_fd, SOL_TCP, TCP_NODELAY, &one, sizeof(one));
cl.peer_state = PEER_CONNECTED;
tfd->set_fd_handler(peer_fd, false, [this](int peer_fd, int epoll_events)
{
handle_peer_epoll(peer_fd, epoll_events);
});
// Check OSD number
check_peer_config(cl);
}
void cluster_client_t::handle_peer_epoll(int peer_fd, int epoll_events)
{
// Mark client as ready (i.e. some data is available)
if (epoll_events & EPOLLRDHUP)
{
// Stop client
printf("[OSD %lu] client %d disconnected\n", this->osd_num, peer_fd);
stop_client(peer_fd);
}
else if (epoll_events & EPOLLIN)
{
// Mark client as ready (i.e. some data is available)
auto & cl = clients[peer_fd];
cl.read_ready++;
if (cl.read_ready == 1)
{
read_ready_clients.push_back(cl.peer_fd);
ringloop->wakeup();
}
}
}
void cluster_client_t::on_connect_peer(osd_num_t peer_osd, int peer_fd)
{
auto & wp = wanted_peers.at(peer_osd);
wp.connecting = false;
if (peer_fd < 0)
{
printf("Failed to connect to peer OSD %lu address %s port %d: %s\n", peer_osd, wp.cur_addr.c_str(), wp.cur_port, strerror(-peer_fd));
if (wp.address_changed)
{
wp.address_changed = false;
wp.address_index = 0;
try_connect_peer(peer_osd);
}
else if (wp.address_index < wp.address_list.array_items().size()-1)
{
// Try other addresses
wp.address_index++;
try_connect_peer(peer_osd);
}
else
{
// Retry again in <peer_connect_interval> seconds
wp.last_connect_attempt = time(NULL);
wp.address_index = 0;
tfd->set_timer(1000*peer_connect_interval, false, [this, peer_osd](int)
{
try_connect_peer(peer_osd);
});
}
return;
}
printf("Connected with peer OSD %lu (fd %d)\n", peer_osd, peer_fd);
wanted_peers.erase(peer_osd);
repeer_pgs(peer_osd);
}
void cluster_client_t::check_peer_config(osd_client_t & cl)
{
osd_op_t *op = new osd_op_t();
op->op_type = OSD_OP_OUT;
op->send_list.push_back(op->req.buf, OSD_PACKET_SIZE);
op->peer_fd = cl.peer_fd;
op->req = {
.show_conf = {
.header = {
.magic = SECONDARY_OSD_OP_MAGIC,
.id = this->next_subop_id++,
.opcode = OSD_OP_SHOW_CONFIG,
},
},
};
op->callback = [this](osd_op_t *op)
{
osd_client_t & cl = clients[op->peer_fd];
std::string json_err;
json11::Json config;
bool err = false;
if (op->reply.hdr.retval < 0)
{
err = true;
printf("Failed to get config from OSD %lu (retval=%ld), disconnecting peer\n", cl.osd_num, op->reply.hdr.retval);
}
else
{
config = json11::Json::parse(std::string((char*)op->buf), json_err);
if (json_err != "")
{
err = true;
printf("Failed to get config from OSD %lu: bad JSON: %s, disconnecting peer\n", cl.osd_num, json_err.c_str());
}
else if (config["osd_num"].uint64_value() != cl.osd_num)
{
err = true;
printf("Connected to OSD %lu instead of OSD %lu, peer state is outdated, disconnecting peer\n", config["osd_num"].uint64_value(), cl.osd_num);
on_connect_peer(cl.osd_num, -1);
}
}
if (err)
{
stop_client(op->peer_fd);
delete op;
return;
}
osd_peer_fds[cl.osd_num] = cl.peer_fd;
on_connect_peer(cl.osd_num, cl.peer_fd);
delete op;
};
outbox_push(op);
}
void cluster_client_t::cancel_osd_ops(osd_client_t & cl)
{
for (auto p: cl.sent_ops)
{
cancel_out_op(p.second);
}
cl.sent_ops.clear();
for (auto op: cl.outbox)
{
cancel_out_op(op);
}
cl.outbox.clear();
if (cl.write_op)
{
cancel_out_op(cl.write_op);
cl.write_op = NULL;
}
}
void cluster_client_t::cancel_out_op(osd_op_t *op)
{
op->reply.hdr.magic = SECONDARY_OSD_REPLY_MAGIC;
op->reply.hdr.id = op->req.hdr.id;
op->reply.hdr.opcode = op->req.hdr.opcode;
op->reply.hdr.retval = -EPIPE;
// Copy lambda to be unaffected by `delete op`
std::function<void(osd_op_t*)>(op->callback)(op);
}
void cluster_client_t::stop_client(int peer_fd)
{
assert(peer_fd != 0);
auto it = clients.find(peer_fd);
if (it == clients.end())
{
return;
}
uint64_t repeer_osd = 0;
osd_client_t cl = it->second;
if (cl.peer_state == PEER_CONNECTED)
{
if (cl.osd_num)
{
// Reload configuration from etcd when the connection is dropped
printf("[OSD %lu] Stopping client %d (OSD peer %lu)\n", osd_num, peer_fd, cl.osd_num);
repeer_osd = cl.osd_num;
}
else
{
printf("[OSD %lu] Stopping client %d (regular client)\n", osd_num, peer_fd);
}
}
clients.erase(it);
tfd->set_fd_handler(peer_fd, false, NULL);
if (cl.osd_num)
{
osd_peer_fds.erase(cl.osd_num);
// Cancel outbound operations
cancel_osd_ops(cl);
}
if (cl.read_op)
{
delete cl.read_op;
cl.read_op = NULL;
}
for (auto rit = read_ready_clients.begin(); rit != read_ready_clients.end(); rit++)
{
if (*rit == peer_fd)
{
read_ready_clients.erase(rit);
break;
}
}
for (auto wit = write_ready_clients.begin(); wit != write_ready_clients.end(); wit++)
{
if (*wit == peer_fd)
{
write_ready_clients.erase(wit);
break;
}
}
free(cl.in_buf);
assert(peer_fd != 0);
close(peer_fd);
if (repeer_osd)
{
repeer_pgs(repeer_osd);
}
}

209
cluster_client.h Normal file
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#pragma once
#include <sys/types.h>
#include <stdint.h>
#include <arpa/inet.h>
#include <malloc.h>
#include <set>
#include <map>
#include <deque>
#include <vector>
#include "json11/json11.hpp"
#include "osd_ops.h"
#include "timerfd_manager.h"
#include "ringloop.h"
#define OSD_OP_IN 0
#define OSD_OP_OUT 1
#define CL_READ_HDR 1
#define CL_READ_DATA 2
#define CL_READ_REPLY_DATA 3
#define CL_WRITE_READY 1
#define CL_WRITE_REPLY 2
#define MAX_EPOLL_EVENTS 64
#define OSD_OP_INLINE_BUF_COUNT 16
#define PEER_CONNECTING 1
#define PEER_CONNECTED 2
struct osd_op_buf_list_t
{
int count = 0, alloc = 0, sent = 0;
iovec *buf = NULL;
iovec inline_buf[OSD_OP_INLINE_BUF_COUNT];
~osd_op_buf_list_t()
{
if (buf && buf != inline_buf)
{
free(buf);
}
}
inline iovec* get_iovec()
{
return (buf ? buf : inline_buf) + sent;
}
inline int get_size()
{
return count - sent;
}
inline void push_back(void *nbuf, size_t len)
{
if (count >= alloc)
{
if (!alloc)
{
alloc = OSD_OP_INLINE_BUF_COUNT;
buf = inline_buf;
}
else if (buf == inline_buf)
{
int old = alloc;
alloc = ((alloc/16)*16 + 1);
buf = (iovec*)malloc(sizeof(iovec) * alloc);
memcpy(buf, inline_buf, sizeof(iovec)*old);
}
else
{
alloc = ((alloc/16)*16 + 1);
buf = (iovec*)realloc(buf, sizeof(iovec) * alloc);
}
}
buf[count++] = { .iov_base = nbuf, .iov_len = len };
}
};
struct blockstore_op_t;
struct osd_primary_op_data_t;
struct osd_op_t
{
timespec tv_begin;
uint64_t op_type = OSD_OP_IN;
int peer_fd;
osd_any_op_t req;
osd_any_reply_t reply;
blockstore_op_t *bs_op = NULL;
void *buf = NULL;
void *rmw_buf = NULL;
osd_primary_op_data_t* op_data = NULL;
std::function<void(osd_op_t*)> callback;
osd_op_buf_list_t send_list;
~osd_op_t();
};
struct osd_client_t
{
sockaddr_in peer_addr;
int peer_port;
int peer_fd;
int peer_state;
int connect_timeout_id = -1;
osd_num_t osd_num = 0;
void *in_buf = NULL;
// Read state
int read_ready = 0;
osd_op_t *read_op = NULL;
int read_reply_id = 0;
iovec read_iov;
msghdr read_msg;
void *read_buf = NULL;
int read_remaining = 0;
int read_state = 0;
// Outbound operations sent to this peer
std::map<int, osd_op_t*> sent_ops;
// Outbound messages (replies or requests)
std::deque<osd_op_t*> outbox;
// PGs dirtied by this client's primary-writes (FIXME to drop the connection)
std::set<pg_num_t> dirty_pgs;
// Write state
osd_op_t *write_op = NULL;
msghdr write_msg;
int write_state = 0;
};
struct osd_wanted_peer_t
{
json11::Json address_list;
int port;
time_t last_connect_attempt;
bool connecting, address_changed;
int address_index;
std::string cur_addr;
int cur_port;
};
struct osd_op_stats_t
{
uint64_t op_stat_sum[OSD_OP_MAX+1] = { 0 };
uint64_t op_stat_count[OSD_OP_MAX+1] = { 0 };
uint64_t op_stat_bytes[OSD_OP_MAX+1] = { 0 };
uint64_t subop_stat_sum[OSD_OP_MAX+1] = { 0 };
uint64_t subop_stat_count[OSD_OP_MAX+1] = { 0 };
};
struct cluster_client_t
{
timerfd_manager_t *tfd;
ring_loop_t *ringloop;
// osd_num_t is only for logging and asserts
osd_num_t osd_num;
int receive_buffer_size = 9000;
int peer_connect_interval = 5;
int peer_connect_timeout = 5;
int log_level = 0;
std::map<osd_num_t, osd_wanted_peer_t> wanted_peers;
std::map<uint64_t, int> osd_peer_fds;
uint64_t next_subop_id = 1;
std::map<int, osd_client_t> clients;
std::vector<int> read_ready_clients;
std::vector<int> write_ready_clients;
// op statistics
osd_op_stats_t stats;
// public
void connect_peer(uint64_t osd_num, json11::Json address_list, int port);
void stop_client(int peer_fd);
void outbox_push(osd_op_t *cur_op);
std::function<void(osd_op_t*)> exec_op;
std::function<void(osd_num_t)> repeer_pgs;
// private
void try_connect_peer(uint64_t osd_num);
void try_connect_peer_addr(osd_num_t peer_osd, const char *peer_host, int peer_port);
void handle_connect_epoll(int peer_fd);
void handle_peer_epoll(int peer_fd, int epoll_events);
void on_connect_peer(osd_num_t peer_osd, int peer_fd);
void check_peer_config(osd_client_t & cl);
void cancel_osd_ops(osd_client_t & cl);
void cancel_out_op(osd_op_t *op);
bool try_send(osd_client_t & cl);
void send_replies();
void handle_send(ring_data_t *data, int peer_fd);
void read_requests();
void handle_read(ring_data_t *data, int peer_fd);
void handle_finished_read(osd_client_t & cl);
void handle_op_hdr(osd_client_t *cl);
void handle_reply_hdr(osd_client_t *cl);
};

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@ -1,13 +0,0 @@
#!/bin/bash
gcc -I. -E -o fio_headers.i src/fio_headers.h
rm -rf fio-copy
for i in `grep -Po 'fio/[^"]+' fio_headers.i | sort | uniq`; do
j=${i##fio/}
p=$(dirname $j)
mkdir -p fio-copy/$p
cp $i fio-copy/$j
done
rm fio_headers.i

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@ -1,18 +0,0 @@
#!/bin/bash
#cd qemu
#debian/rules b/configure-stamp
#cd b/qemu; make qapi
gcc -I qemu/b/qemu `pkg-config glib-2.0 --cflags` \
-I qemu/include -E -o qemu_driver.i src/qemu_driver.c
rm -rf qemu-copy
for i in `grep -Po 'qemu/[^"]+' qemu_driver.i | sort | uniq`; do
j=${i##qemu/}
p=$(dirname $j)
mkdir -p qemu-copy/$p
cp $i qemu-copy/$j
done
rm qemu_driver.i

@ -1 +0,0 @@
Subproject commit 5dc108754ad40d3b1d024f9bd7cca0595ef1a1db

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@ -8,10 +8,4 @@
// unsigned __int64 _mm_crc32_u64 (unsigned __int64 crc, unsigned __int64 v)
// unsigned int _mm_crc32_u8 (unsigned int crc, unsigned char v)
#ifdef __cplusplus
extern "C" {
#endif
uint32_t crc32c(uint32_t crc, const void *buf, size_t len);
#ifdef __cplusplus
};
#endif

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@ -1,3 +0,0 @@
vitastor-csi
go.sum
Dockerfile

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@ -1,32 +0,0 @@
# Compile stage
FROM golang:buster AS build
ADD go.mod /app/
RUN cd /app; CGO_ENABLED=1 GOOS=linux GOARCH=amd64 go mod download -x
ADD . /app
RUN perl -i -e '$/ = undef; while(<>) { s/\n\s*(\{\s*\n)/$1\n/g; s/\}(\s*\n\s*)else\b/$1} else/g; print; }' `find /app -name '*.go'`
RUN cd /app; CGO_ENABLED=1 GOOS=linux GOARCH=amd64 go build -o vitastor-csi
# Final stage
FROM debian:buster
LABEL maintainers="Vitaliy Filippov <vitalif@yourcmc.ru>"
LABEL description="Vitastor CSI Driver"
ENV NODE_ID=""
ENV CSI_ENDPOINT=""
RUN apt-get update && \
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 buster main > /etc/apt/sources.list.d/vitastor.list) && \
(echo deb http://deb.debian.org/debian buster-backports main > /etc/apt/sources.list.d/backports.list) && \
(echo "APT::Install-Recommends false;" > /etc/apt/apt.conf) && \
apt-get update && \
apt-get install -y e2fsprogs xfsprogs vitastor kmod && \
apt-get clean && \
(echo options nbd nbds_max=128 > /etc/modprobe.d/nbd.conf)
COPY --from=build /app/vitastor-csi /bin/
ENTRYPOINT ["/bin/vitastor-csi"]

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@ -1,9 +0,0 @@
VERSION ?= v0.6.5
all: build push
build:
@docker build --rm -t vitalif/vitastor-csi:$(VERSION) .
push:
@docker push vitalif/vitastor-csi:$(VERSION)

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@ -1,5 +0,0 @@
---
apiVersion: v1
kind: Namespace
metadata:
name: vitastor-system

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@ -1,9 +0,0 @@
---
apiVersion: v1
kind: ConfigMap
data:
vitastor.conf: |-
{"etcd_address":"http://192.168.7.2:2379","etcd_prefix":"/vitastor"}
metadata:
namespace: vitastor-system
name: vitastor-config

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@ -1,37 +0,0 @@
---
apiVersion: v1
kind: ServiceAccount
metadata:
namespace: vitastor-system
name: vitastor-csi-nodeplugin
---
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1
metadata:
namespace: vitastor-system
name: vitastor-csi-nodeplugin
rules:
- apiGroups: [""]
resources: ["nodes"]
verbs: ["get"]
# allow to read Vault Token and connection options from the Tenants namespace
- apiGroups: [""]
resources: ["secrets"]
verbs: ["get"]
- apiGroups: [""]
resources: ["configmaps"]
verbs: ["get"]
---
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:
namespace: vitastor-system
name: vitastor-csi-nodeplugin
subjects:
- kind: ServiceAccount
name: vitastor-csi-nodeplugin
namespace: vitastor-system
roleRef:
kind: ClusterRole
name: vitastor-csi-nodeplugin
apiGroup: rbac.authorization.k8s.io

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@ -1,72 +0,0 @@
---
apiVersion: policy/v1beta1
kind: PodSecurityPolicy
metadata:
namespace: vitastor-system
name: vitastor-csi-nodeplugin-psp
spec:
allowPrivilegeEscalation: true
allowedCapabilities:
- 'SYS_ADMIN'
fsGroup:
rule: RunAsAny
privileged: true
hostNetwork: true
hostPID: true
runAsUser:
rule: RunAsAny
seLinux:
rule: RunAsAny
supplementalGroups:
rule: RunAsAny
volumes:
- 'configMap'
- 'emptyDir'
- 'projected'
- 'secret'
- 'downwardAPI'
- 'hostPath'
allowedHostPaths:
- pathPrefix: '/dev'
readOnly: false
- pathPrefix: '/run/mount'
readOnly: false
- pathPrefix: '/sys'
readOnly: false
- pathPrefix: '/lib/modules'
readOnly: true
- pathPrefix: '/var/lib/kubelet/pods'
readOnly: false
- pathPrefix: '/var/lib/kubelet/plugins/csi.vitastor.io'
readOnly: false
- pathPrefix: '/var/lib/kubelet/plugins_registry'
readOnly: false
- pathPrefix: '/var/lib/kubelet/plugins'
readOnly: false
---
kind: Role
apiVersion: rbac.authorization.k8s.io/v1
metadata:
namespace: vitastor-system
name: vitastor-csi-nodeplugin-psp
rules:
- apiGroups: ['policy']
resources: ['podsecuritypolicies']
verbs: ['use']
resourceNames: ['vitastor-csi-nodeplugin-psp']
---
kind: RoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:
namespace: vitastor-system
name: vitastor-csi-nodeplugin-psp
subjects:
- kind: ServiceAccount
name: vitastor-csi-nodeplugin
namespace: vitastor-system
roleRef:
kind: Role
name: vitastor-csi-nodeplugin-psp
apiGroup: rbac.authorization.k8s.io

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@ -1,140 +0,0 @@
---
kind: DaemonSet
apiVersion: apps/v1
metadata:
namespace: vitastor-system
name: csi-vitastor
spec:
selector:
matchLabels:
app: csi-vitastor
template:
metadata:
namespace: vitastor-system
labels:
app: csi-vitastor
spec:
serviceAccountName: vitastor-csi-nodeplugin
hostNetwork: true
hostPID: true
priorityClassName: system-node-critical
# to use e.g. Rook orchestrated cluster, and mons' FQDN is
# resolved through k8s service, set dns policy to cluster first
dnsPolicy: ClusterFirstWithHostNet
containers:
- name: driver-registrar
# This is necessary only for systems with SELinux, where
# non-privileged sidecar containers cannot access unix domain socket
# created by privileged CSI driver container.
securityContext:
privileged: true
image: k8s.gcr.io/sig-storage/csi-node-driver-registrar:v2.2.0
args:
- "--v=5"
- "--csi-address=/csi/csi.sock"
- "--kubelet-registration-path=/var/lib/kubelet/plugins/csi.vitastor.io/csi.sock"
env:
- name: KUBE_NODE_NAME
valueFrom:
fieldRef:
fieldPath: spec.nodeName
volumeMounts:
- name: socket-dir
mountPath: /csi
- name: registration-dir
mountPath: /registration
- name: csi-vitastor
securityContext:
privileged: true
capabilities:
add: ["SYS_ADMIN"]
allowPrivilegeEscalation: true
image: vitalif/vitastor-csi:v0.6.5
args:
- "--node=$(NODE_ID)"
- "--endpoint=$(CSI_ENDPOINT)"
env:
- name: NODE_ID
valueFrom:
fieldRef:
fieldPath: spec.nodeName
- name: CSI_ENDPOINT
value: unix:///csi/csi.sock
imagePullPolicy: "IfNotPresent"
ports:
- containerPort: 9898
name: healthz
protocol: TCP
livenessProbe:
failureThreshold: 5
httpGet:
path: /healthz
port: healthz
initialDelaySeconds: 10
timeoutSeconds: 3
periodSeconds: 2
volumeMounts:
- name: socket-dir
mountPath: /csi
- mountPath: /dev
name: host-dev
- mountPath: /sys
name: host-sys
- mountPath: /run/mount
name: host-mount
- mountPath: /lib/modules
name: lib-modules
readOnly: true
- name: vitastor-config
mountPath: /etc/vitastor
- name: plugin-dir
mountPath: /var/lib/kubelet/plugins
mountPropagation: "Bidirectional"
- name: mountpoint-dir
mountPath: /var/lib/kubelet/pods
mountPropagation: "Bidirectional"
- name: liveness-probe
securityContext:
privileged: true
image: quay.io/k8scsi/livenessprobe:v1.1.0
args:
- "--csi-address=$(CSI_ENDPOINT)"
- "--health-port=9898"
env:
- name: CSI_ENDPOINT
value: unix://csi/csi.sock
volumeMounts:
- mountPath: /csi
name: socket-dir
volumes:
- name: socket-dir
hostPath:
path: /var/lib/kubelet/plugins/csi.vitastor.io
type: DirectoryOrCreate
- name: plugin-dir
hostPath:
path: /var/lib/kubelet/plugins
type: Directory
- name: mountpoint-dir
hostPath:
path: /var/lib/kubelet/pods
type: DirectoryOrCreate
- name: registration-dir
hostPath:
path: /var/lib/kubelet/plugins_registry/
type: Directory
- name: host-dev
hostPath:
path: /dev
- name: host-sys
hostPath:
path: /sys
- name: host-mount
hostPath:
path: /run/mount
- name: lib-modules
hostPath:
path: /lib/modules
- name: vitastor-config
configMap:
name: vitastor-config

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@ -1,102 +0,0 @@
---
apiVersion: v1
kind: ServiceAccount
metadata:
namespace: vitastor-system
name: vitastor-csi-provisioner
---
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1
metadata:
namespace: vitastor-system
name: vitastor-external-provisioner-runner
rules:
- apiGroups: [""]
resources: ["nodes"]
verbs: ["get", "list", "watch"]
- apiGroups: [""]
resources: ["secrets"]
verbs: ["get", "list", "watch"]
- apiGroups: [""]
resources: ["events"]
verbs: ["list", "watch", "create", "update", "patch"]
- apiGroups: [""]
resources: ["persistentvolumes"]
verbs: ["get", "list", "watch", "create", "update", "delete", "patch"]
- apiGroups: [""]
resources: ["persistentvolumeclaims"]
verbs: ["get", "list", "watch", "update"]
- apiGroups: [""]
resources: ["persistentvolumeclaims/status"]
verbs: ["update", "patch"]
- apiGroups: ["storage.k8s.io"]
resources: ["storageclasses"]
verbs: ["get", "list", "watch"]
- apiGroups: ["snapshot.storage.k8s.io"]
resources: ["volumesnapshots"]
verbs: ["get", "list"]
- apiGroups: ["snapshot.storage.k8s.io"]
resources: ["volumesnapshotcontents"]
verbs: ["create", "get", "list", "watch", "update", "delete"]
- apiGroups: ["snapshot.storage.k8s.io"]
resources: ["volumesnapshotclasses"]
verbs: ["get", "list", "watch"]
- apiGroups: ["storage.k8s.io"]
resources: ["volumeattachments"]
verbs: ["get", "list", "watch", "update", "patch"]
- apiGroups: ["storage.k8s.io"]
resources: ["volumeattachments/status"]
verbs: ["patch"]
- apiGroups: ["storage.k8s.io"]
resources: ["csinodes"]
verbs: ["get", "list", "watch"]
- apiGroups: ["snapshot.storage.k8s.io"]
resources: ["volumesnapshotcontents/status"]
verbs: ["update"]
- apiGroups: [""]
resources: ["configmaps"]
verbs: ["get"]
---
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:
namespace: vitastor-system
name: vitastor-csi-provisioner-role
subjects:
- kind: ServiceAccount
name: vitastor-csi-provisioner
namespace: vitastor-system
roleRef:
kind: ClusterRole
name: vitastor-external-provisioner-runner
apiGroup: rbac.authorization.k8s.io
---
kind: Role
apiVersion: rbac.authorization.k8s.io/v1
metadata:
namespace: vitastor-system
name: vitastor-external-provisioner-cfg
rules:
- apiGroups: [""]
resources: ["configmaps"]
verbs: ["get", "list", "watch", "create", "update", "delete"]
- apiGroups: ["coordination.k8s.io"]
resources: ["leases"]
verbs: ["get", "watch", "list", "delete", "update", "create"]
---
kind: RoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:
name: vitastor-csi-provisioner-role-cfg
namespace: vitastor-system
subjects:
- kind: ServiceAccount
name: vitastor-csi-provisioner
namespace: vitastor-system
roleRef:
kind: Role
name: vitastor-external-provisioner-cfg
apiGroup: rbac.authorization.k8s.io

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@ -1,60 +0,0 @@
---
apiVersion: policy/v1beta1
kind: PodSecurityPolicy
metadata:
namespace: vitastor-system
name: vitastor-csi-provisioner-psp
spec:
allowPrivilegeEscalation: true
allowedCapabilities:
- 'SYS_ADMIN'
fsGroup:
rule: RunAsAny
privileged: true
runAsUser:
rule: RunAsAny
seLinux:
rule: RunAsAny
supplementalGroups:
rule: RunAsAny
volumes:
- 'configMap'
- 'emptyDir'
- 'projected'
- 'secret'
- 'downwardAPI'
- 'hostPath'
allowedHostPaths:
- pathPrefix: '/dev'
readOnly: false
- pathPrefix: '/sys'
readOnly: false
- pathPrefix: '/lib/modules'
readOnly: true
---
kind: Role
apiVersion: rbac.authorization.k8s.io/v1
metadata:
namespace: vitastor-system
name: vitastor-csi-provisioner-psp
rules:
- apiGroups: ['policy']
resources: ['podsecuritypolicies']
verbs: ['use']
resourceNames: ['vitastor-csi-provisioner-psp']
---
kind: RoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:
name: vitastor-csi-provisioner-psp
namespace: vitastor-system
subjects:
- kind: ServiceAccount
name: vitastor-csi-provisioner
namespace: vitastor-system
roleRef:
kind: Role
name: vitastor-csi-provisioner-psp
apiGroup: rbac.authorization.k8s.io

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@ -1,159 +0,0 @@
---
kind: Service
apiVersion: v1
metadata:
namespace: vitastor-system
name: csi-vitastor-provisioner
labels:
app: csi-metrics
spec:
selector:
app: csi-vitastor-provisioner
ports:
- name: http-metrics
port: 8080
protocol: TCP
targetPort: 8680
---
kind: Deployment
apiVersion: apps/v1
metadata:
namespace: vitastor-system
name: csi-vitastor-provisioner
spec:
replicas: 3
selector:
matchLabels:
app: csi-vitastor-provisioner
template:
metadata:
namespace: vitastor-system
labels:
app: csi-vitastor-provisioner
spec:
affinity:
podAntiAffinity:
requiredDuringSchedulingIgnoredDuringExecution:
- labelSelector:
matchExpressions:
- key: app
operator: In
values:
- csi-vitastor-provisioner
topologyKey: "kubernetes.io/hostname"
serviceAccountName: vitastor-csi-provisioner
priorityClassName: system-cluster-critical
containers:
- name: csi-provisioner
image: k8s.gcr.io/sig-storage/csi-provisioner:v2.2.0
args:
- "--csi-address=$(ADDRESS)"
- "--v=5"
- "--timeout=150s"
- "--retry-interval-start=500ms"
- "--leader-election=true"
# set it to true to use topology based provisioning
- "--feature-gates=Topology=false"
# if fstype is not specified in storageclass, ext4 is default
- "--default-fstype=ext4"
- "--extra-create-metadata=true"
env:
- name: ADDRESS
value: unix:///csi/csi-provisioner.sock
imagePullPolicy: "IfNotPresent"
volumeMounts:
- name: socket-dir
mountPath: /csi
- name: csi-snapshotter
image: k8s.gcr.io/sig-storage/csi-snapshotter:v4.0.0
args:
- "--csi-address=$(ADDRESS)"
- "--v=5"
- "--timeout=150s"
- "--leader-election=true"
env:
- name: ADDRESS
value: unix:///csi/csi-provisioner.sock
imagePullPolicy: "IfNotPresent"
securityContext:
privileged: true
volumeMounts:
- name: socket-dir
mountPath: /csi
- name: csi-attacher
image: k8s.gcr.io/sig-storage/csi-attacher:v3.1.0
args:
- "--v=5"
- "--csi-address=$(ADDRESS)"
- "--leader-election=true"
- "--retry-interval-start=500ms"
env:
- name: ADDRESS
value: /csi/csi-provisioner.sock
imagePullPolicy: "IfNotPresent"
volumeMounts:
- name: socket-dir
mountPath: /csi
- name: csi-resizer
image: k8s.gcr.io/sig-storage/csi-resizer:v1.1.0
args:
- "--csi-address=$(ADDRESS)"
- "--v=5"
- "--timeout=150s"
- "--leader-election"
- "--retry-interval-start=500ms"
- "--handle-volume-inuse-error=false"
env:
- name: ADDRESS
value: unix:///csi/csi-provisioner.sock
imagePullPolicy: "IfNotPresent"
volumeMounts:
- name: socket-dir
mountPath: /csi
- name: csi-vitastor
securityContext:
privileged: true
capabilities:
add: ["SYS_ADMIN"]
image: vitalif/vitastor-csi:v0.6.5
args:
- "--node=$(NODE_ID)"
- "--endpoint=$(CSI_ENDPOINT)"
env:
- name: NODE_ID
valueFrom:
fieldRef:
fieldPath: spec.nodeName
- name: CSI_ENDPOINT
value: unix:///csi/csi-provisioner.sock
imagePullPolicy: "IfNotPresent"
volumeMounts:
- name: socket-dir
mountPath: /csi
- mountPath: /dev
name: host-dev
- mountPath: /sys
name: host-sys
- mountPath: /lib/modules
name: lib-modules
readOnly: true
- name: vitastor-config
mountPath: /etc/vitastor
volumes:
- name: host-dev
hostPath:
path: /dev
- name: host-sys
hostPath:
path: /sys
- name: lib-modules
hostPath:
path: /lib/modules
- name: socket-dir
emptyDir: {
medium: "Memory"
}
- name: vitastor-config
configMap:
name: vitastor-config

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@ -1,11 +0,0 @@
---
# if Kubernetes version is less than 1.18 change
# apiVersion to storage.k8s.io/v1betav1
apiVersion: storage.k8s.io/v1
kind: CSIDriver
metadata:
namespace: vitastor-system
name: csi.vitastor.io
spec:
attachRequired: true
podInfoOnMount: false

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@ -1,19 +0,0 @@
---
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
namespace: vitastor-system
name: vitastor
annotations:
storageclass.kubernetes.io/is-default-class: "true"
provisioner: csi.vitastor.io
volumeBindingMode: Immediate
parameters:
etcdVolumePrefix: ""
poolId: "1"
# you can choose other configuration file if you have it in the config map
#configPath: "/etc/vitastor/vitastor.conf"
# you can also specify etcdUrl here, maybe to connect to another Vitastor cluster
# multiple etcdUrls may be specified, delimited by comma
#etcdUrl: "http://192.168.7.2:2379"
#etcdPrefix: "/vitastor"

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@ -1,12 +0,0 @@
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
name: test-vitastor-pvc
spec:
storageClassName: vitastor
accessModes:
- ReadWriteOnce
resources:
requests:
storage: 10Gi

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@ -1,35 +0,0 @@
module vitastor.io/csi
go 1.15
require (
github.com/container-storage-interface/spec v1.4.0
github.com/coreos/bbolt v0.0.0-00010101000000-000000000000 // indirect
github.com/coreos/etcd v3.3.25+incompatible // indirect
github.com/coreos/go-semver v0.3.0 // indirect
github.com/coreos/go-systemd v0.0.0-20191104093116-d3cd4ed1dbcf // indirect
github.com/coreos/pkg v0.0.0-20180928190104-399ea9e2e55f // indirect
github.com/dustin/go-humanize v1.0.0 // indirect
github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b
github.com/gorilla/websocket v1.4.2 // indirect
github.com/grpc-ecosystem/go-grpc-middleware v1.3.0 // indirect
github.com/grpc-ecosystem/go-grpc-prometheus v1.2.0 // indirect
github.com/grpc-ecosystem/grpc-gateway v1.16.0 // indirect
github.com/jonboulle/clockwork v0.2.2 // indirect
github.com/kubernetes-csi/csi-lib-utils v0.9.1
github.com/soheilhy/cmux v0.1.5 // indirect
github.com/tmc/grpc-websocket-proxy v0.0.0-20201229170055-e5319fda7802 // indirect
github.com/xiang90/probing v0.0.0-20190116061207-43a291ad63a2 // indirect
go.etcd.io/bbolt v0.0.0-00010101000000-000000000000 // indirect
go.etcd.io/etcd v3.3.25+incompatible
golang.org/x/net v0.0.0-20201202161906-c7110b5ffcbb
google.golang.org/grpc v1.33.1
k8s.io/klog v1.0.0
k8s.io/utils v0.0.0-20210305010621-2afb4311ab10
)
replace github.com/coreos/bbolt => go.etcd.io/bbolt v1.3.5
replace go.etcd.io/bbolt => github.com/coreos/bbolt v1.3.5
replace google.golang.org/grpc => google.golang.org/grpc v1.25.1

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@ -1,22 +0,0 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 or GNU GPL-2.0+ (see README.md for details)
package vitastor
const (
vitastorCSIDriverName = "csi.vitastor.io"
vitastorCSIDriverVersion = "0.6.5"
)
// Config struct fills the parameters of request or user input
type Config struct
{
Endpoint string
NodeID string
}
// NewConfig returns config struct to initialize new driver
func NewConfig() *Config
{
return &Config{}
}

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@ -1,530 +0,0 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 or GNU GPL-2.0+ (see README.md for details)
package vitastor
import (
"context"
"encoding/json"
"strings"
"bytes"
"strconv"
"time"
"fmt"
"os"
"os/exec"
"io/ioutil"
"github.com/kubernetes-csi/csi-lib-utils/protosanitizer"
"k8s.io/klog"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
"go.etcd.io/etcd/clientv3"
"github.com/container-storage-interface/spec/lib/go/csi"
)
const (
KB int64 = 1024
MB int64 = 1024 * KB
GB int64 = 1024 * MB
TB int64 = 1024 * GB
ETCD_TIMEOUT time.Duration = 15*time.Second
)
type InodeIndex struct
{
Id uint64 `json:"id"`
PoolId uint64 `json:"pool_id"`
}
type InodeConfig struct
{
Name string `json:"name"`
Size uint64 `json:"size,omitempty"`
ParentPool uint64 `json:"parent_pool,omitempty"`
ParentId uint64 `json:"parent_id,omitempty"`
Readonly bool `json:"readonly,omitempty"`
}
type ControllerServer struct
{
*Driver
}
// NewControllerServer create new instance controller
func NewControllerServer(driver *Driver) *ControllerServer
{
return &ControllerServer{
Driver: driver,
}
}
func GetConnectionParams(params map[string]string) (map[string]string, []string, string)
{
ctxVars := make(map[string]string)
configPath := params["configPath"]
if (configPath == "")
{
configPath = "/etc/vitastor/vitastor.conf"
}
else
{
ctxVars["configPath"] = configPath
}
config := make(map[string]interface{})
if configFD, err := os.Open(configPath); err == nil
{
defer configFD.Close()
data, _ := ioutil.ReadAll(configFD)
json.Unmarshal(data, &config)
}
// Try to load prefix & etcd URL from the config
var etcdUrl []string
if (params["etcdUrl"] != "")
{
ctxVars["etcdUrl"] = params["etcdUrl"]
etcdUrl = strings.Split(params["etcdUrl"], ",")
}
if (len(etcdUrl) == 0)
{
switch config["etcd_address"].(type)
{
case string:
etcdUrl = strings.Split(config["etcd_address"].(string), ",")
case []string:
etcdUrl = config["etcd_address"].([]string)
}
}
etcdPrefix := params["etcdPrefix"]
if (etcdPrefix == "")
{
etcdPrefix, _ = config["etcd_prefix"].(string)
if (etcdPrefix == "")
{
etcdPrefix = "/vitastor"
}
}
else
{
ctxVars["etcdPrefix"] = etcdPrefix
}
return ctxVars, etcdUrl, etcdPrefix
}
// Create the volume
func (cs *ControllerServer) CreateVolume(ctx context.Context, req *csi.CreateVolumeRequest) (*csi.CreateVolumeResponse, error)
{
klog.Infof("received controller create volume request %+v", protosanitizer.StripSecrets(req))
if (req == nil)
{
return nil, status.Errorf(codes.InvalidArgument, "request cannot be empty")
}
if (req.GetName() == "")
{
return nil, status.Error(codes.InvalidArgument, "name is a required field")
}
volumeCapabilities := req.GetVolumeCapabilities()
if (volumeCapabilities == nil)
{
return nil, status.Error(codes.InvalidArgument, "volume capabilities is a required field")
}
etcdVolumePrefix := req.Parameters["etcdVolumePrefix"]
poolId, _ := strconv.ParseUint(req.Parameters["poolId"], 10, 64)
if (poolId == 0)
{
return nil, status.Error(codes.InvalidArgument, "poolId is missing in storage class configuration")
}
volName := etcdVolumePrefix + req.GetName()
volSize := 1 * GB
if capRange := req.GetCapacityRange(); capRange != nil
{
volSize = ((capRange.GetRequiredBytes() + MB - 1) / MB) * MB
}
// FIXME: The following should PROBABLY be implemented externally in a management tool
ctxVars, etcdUrl, etcdPrefix := GetConnectionParams(req.Parameters)
if (len(etcdUrl) == 0)
{
return nil, status.Error(codes.InvalidArgument, "no etcdUrl in storage class configuration and no etcd_address in vitastor.conf")
}
// Connect to etcd
cli, err := clientv3.New(clientv3.Config{
DialTimeout: ETCD_TIMEOUT,
Endpoints: etcdUrl,
})
if (err != nil)
{
return nil, status.Error(codes.Internal, "failed to connect to etcd at "+strings.Join(etcdUrl, ",")+": "+err.Error())
}
defer cli.Close()
var imageId uint64 = 0
for
{
// Check if the image exists
ctx, cancel := context.WithTimeout(context.Background(), ETCD_TIMEOUT)
resp, err := cli.Get(ctx, etcdPrefix+"/index/image/"+volName)
cancel()
if (err != nil)
{
return nil, status.Error(codes.Internal, "failed to read key from etcd: "+err.Error())
}
if (len(resp.Kvs) > 0)
{
kv := resp.Kvs[0]
var v InodeIndex
err := json.Unmarshal(kv.Value, &v)
if (err != nil)
{
return nil, status.Error(codes.Internal, "invalid /index/image/"+volName+" key in etcd: "+err.Error())
}
poolId = v.PoolId
imageId = v.Id
inodeCfgKey := fmt.Sprintf("/config/inode/%d/%d", poolId, imageId)
ctx, cancel := context.WithTimeout(context.Background(), ETCD_TIMEOUT)
resp, err := cli.Get(ctx, etcdPrefix+inodeCfgKey)
cancel()
if (err != nil)
{
return nil, status.Error(codes.Internal, "failed to read key from etcd: "+err.Error())
}
if (len(resp.Kvs) == 0)
{
return nil, status.Error(codes.Internal, "missing "+inodeCfgKey+" key in etcd")
}
var inodeCfg InodeConfig
err = json.Unmarshal(resp.Kvs[0].Value, &inodeCfg)
if (err != nil)
{
return nil, status.Error(codes.Internal, "invalid "+inodeCfgKey+" key in etcd: "+err.Error())
}
if (inodeCfg.Size < uint64(volSize))
{
return nil, status.Error(codes.Internal, "image "+volName+" is already created, but size is less than expected")
}
}
else
{
// Find a free ID
// Create image metadata in a transaction verifying that the image doesn't exist yet AND ID is still free
maxIdKey := fmt.Sprintf("%s/index/maxid/%d", etcdPrefix, poolId)
ctx, cancel := context.WithTimeout(context.Background(), ETCD_TIMEOUT)
resp, err := cli.Get(ctx, maxIdKey)
cancel()
if (err != nil)
{
return nil, status.Error(codes.Internal, "failed to read key from etcd: "+err.Error())
}
var modRev int64
var nextId uint64
if (len(resp.Kvs) > 0)
{
var err error
nextId, err = strconv.ParseUint(string(resp.Kvs[0].Value), 10, 64)
if (err != nil)
{
return nil, status.Error(codes.Internal, maxIdKey+" contains invalid ID")
}
modRev = resp.Kvs[0].ModRevision
nextId++
}
else
{
nextId = 1
}
inodeIdxJson, _ := json.Marshal(InodeIndex{
Id: nextId,
PoolId: poolId,
})
inodeCfgJson, _ := json.Marshal(InodeConfig{
Name: volName,
Size: uint64(volSize),
})
ctx, cancel = context.WithTimeout(context.Background(), ETCD_TIMEOUT)
txnResp, err := cli.Txn(ctx).If(
clientv3.Compare(clientv3.ModRevision(fmt.Sprintf("%s/index/maxid/%d", etcdPrefix, poolId)), "=", modRev),
clientv3.Compare(clientv3.CreateRevision(fmt.Sprintf("%s/index/image/%s", etcdPrefix, volName)), "=", 0),
clientv3.Compare(clientv3.CreateRevision(fmt.Sprintf("%s/config/inode/%d/%d", etcdPrefix, poolId, nextId)), "=", 0),
).Then(
clientv3.OpPut(fmt.Sprintf("%s/index/maxid/%d", etcdPrefix, poolId), fmt.Sprintf("%d", nextId)),
clientv3.OpPut(fmt.Sprintf("%s/index/image/%s", etcdPrefix, volName), string(inodeIdxJson)),
clientv3.OpPut(fmt.Sprintf("%s/config/inode/%d/%d", etcdPrefix, poolId, nextId), string(inodeCfgJson)),
).Commit()
cancel()
if (err != nil)
{
return nil, status.Error(codes.Internal, "failed to commit transaction in etcd: "+err.Error())
}
if (txnResp.Succeeded)
{
imageId = nextId
break
}
// Start over if the transaction fails
}
}
ctxVars["name"] = volName
volumeIdJson, _ := json.Marshal(ctxVars)
return &csi.CreateVolumeResponse{
Volume: &csi.Volume{
// Ugly, but VolumeContext isn't passed to DeleteVolume :-(
VolumeId: string(volumeIdJson),
CapacityBytes: volSize,
},
}, nil
}
// DeleteVolume deletes the given volume
func (cs *ControllerServer) DeleteVolume(ctx context.Context, req *csi.DeleteVolumeRequest) (*csi.DeleteVolumeResponse, error)
{
klog.Infof("received controller delete volume request %+v", protosanitizer.StripSecrets(req))
if (req == nil)
{
return nil, status.Error(codes.InvalidArgument, "request cannot be empty")
}
ctxVars := make(map[string]string)
err := json.Unmarshal([]byte(req.VolumeId), &ctxVars)
if (err != nil)
{
return nil, status.Error(codes.Internal, "volume ID not in JSON format")
}
volName := ctxVars["name"]
_, etcdUrl, etcdPrefix := GetConnectionParams(ctxVars)
if (len(etcdUrl) == 0)
{
return nil, status.Error(codes.InvalidArgument, "no etcdUrl in storage class configuration and no etcd_address in vitastor.conf")
}
cli, err := clientv3.New(clientv3.Config{
DialTimeout: ETCD_TIMEOUT,
Endpoints: etcdUrl,
})
if (err != nil)
{
return nil, status.Error(codes.Internal, "failed to connect to etcd at "+strings.Join(etcdUrl, ",")+": "+err.Error())
}
defer cli.Close()
// Find inode by name
ctx, cancel := context.WithTimeout(context.Background(), ETCD_TIMEOUT)
resp, err := cli.Get(ctx, etcdPrefix+"/index/image/"+volName)
cancel()
if (err != nil)
{
return nil, status.Error(codes.Internal, "failed to read key from etcd: "+err.Error())
}
if (len(resp.Kvs) == 0)
{
return nil, status.Error(codes.NotFound, "volume "+volName+" does not exist")
}
var idx InodeIndex
err = json.Unmarshal(resp.Kvs[0].Value, &idx)
if (err != nil)
{
return nil, status.Error(codes.Internal, "invalid /index/image/"+volName+" key in etcd: "+err.Error())
}
// Get inode config
inodeCfgKey := fmt.Sprintf("%s/config/inode/%d/%d", etcdPrefix, idx.PoolId, idx.Id)
ctx, cancel = context.WithTimeout(context.Background(), ETCD_TIMEOUT)
resp, err = cli.Get(ctx, inodeCfgKey)
cancel()
if (err != nil)
{
return nil, status.Error(codes.Internal, "failed to read key from etcd: "+err.Error())
}
if (len(resp.Kvs) == 0)
{
return nil, status.Error(codes.NotFound, "volume "+volName+" does not exist")
}
var inodeCfg InodeConfig
err = json.Unmarshal(resp.Kvs[0].Value, &inodeCfg)
if (err != nil)
{
return nil, status.Error(codes.Internal, "invalid "+inodeCfgKey+" key in etcd: "+err.Error())
}
// Delete inode data by invoking vitastor-rm
args := []string{
"--etcd_address", strings.Join(etcdUrl, ","),
"--pool", fmt.Sprintf("%d", idx.PoolId),
"--inode", fmt.Sprintf("%d", idx.Id),
}
if (ctxVars["configPath"] != "")
{
args = append(args, "--config_path", ctxVars["configPath"])
}
c := exec.Command("/usr/bin/vitastor-rm", args...)
var stderr bytes.Buffer
c.Stdout = nil
c.Stderr = &stderr
err = c.Run()
stderrStr := string(stderr.Bytes())
if (err != nil)
{
klog.Errorf("vitastor-rm failed: %s, status %s\n", stderrStr, err)
return nil, status.Error(codes.Internal, stderrStr+" (status "+err.Error()+")")
}
// Delete inode config in etcd
ctx, cancel = context.WithTimeout(context.Background(), ETCD_TIMEOUT)
txnResp, err := cli.Txn(ctx).Then(
clientv3.OpDelete(fmt.Sprintf("%s/index/image/%s", etcdPrefix, volName)),
clientv3.OpDelete(fmt.Sprintf("%s/config/inode/%d/%d", etcdPrefix, idx.PoolId, idx.Id)),
).Commit()
cancel()
if (err != nil)
{
return nil, status.Error(codes.Internal, "failed to delete keys in etcd: "+err.Error())
}
if (!txnResp.Succeeded)
{
return nil, status.Error(codes.Internal, "failed to delete keys in etcd: transaction failed")
}
return &csi.DeleteVolumeResponse{}, nil
}
// ControllerPublishVolume return Unimplemented error
func (cs *ControllerServer) ControllerPublishVolume(ctx context.Context, req *csi.ControllerPublishVolumeRequest) (*csi.ControllerPublishVolumeResponse, error)
{
return nil, status.Error(codes.Unimplemented, "")
}
// ControllerUnpublishVolume return Unimplemented error
func (cs *ControllerServer) ControllerUnpublishVolume(ctx context.Context, req *csi.ControllerUnpublishVolumeRequest) (*csi.ControllerUnpublishVolumeResponse, error)
{
return nil, status.Error(codes.Unimplemented, "")
}
// ValidateVolumeCapabilities checks whether the volume capabilities requested are supported.
func (cs *ControllerServer) ValidateVolumeCapabilities(ctx context.Context, req *csi.ValidateVolumeCapabilitiesRequest) (*csi.ValidateVolumeCapabilitiesResponse, error)
{
klog.Infof("received controller validate volume capability request %+v", protosanitizer.StripSecrets(req))
if (req == nil)
{
return nil, status.Errorf(codes.InvalidArgument, "request is nil")
}
volumeID := req.GetVolumeId()
if (volumeID == "")
{
return nil, status.Error(codes.InvalidArgument, "volumeId is nil")
}
volumeCapabilities := req.GetVolumeCapabilities()
if (volumeCapabilities == nil)
{
return nil, status.Error(codes.InvalidArgument, "volumeCapabilities is nil")
}
var volumeCapabilityAccessModes []*csi.VolumeCapability_AccessMode
for _, mode := range []csi.VolumeCapability_AccessMode_Mode{
csi.VolumeCapability_AccessMode_SINGLE_NODE_WRITER,
csi.VolumeCapability_AccessMode_MULTI_NODE_MULTI_WRITER,
} {
volumeCapabilityAccessModes = append(volumeCapabilityAccessModes, &csi.VolumeCapability_AccessMode{Mode: mode})
}
capabilitySupport := false
for _, capability := range volumeCapabilities
{
for _, volumeCapabilityAccessMode := range volumeCapabilityAccessModes
{
if (volumeCapabilityAccessMode.Mode == capability.AccessMode.Mode)
{
capabilitySupport = true
}
}
}
if (!capabilitySupport)
{
return nil, status.Errorf(codes.NotFound, "%v not supported", req.GetVolumeCapabilities())
}
return &csi.ValidateVolumeCapabilitiesResponse{
Confirmed: &csi.ValidateVolumeCapabilitiesResponse_Confirmed{
VolumeCapabilities: req.VolumeCapabilities,
},
}, nil
}
// ListVolumes returns a list of volumes
func (cs *ControllerServer) ListVolumes(ctx context.Context, req *csi.ListVolumesRequest) (*csi.ListVolumesResponse, error)
{
return nil, status.Error(codes.Unimplemented, "")
}
// GetCapacity returns the capacity of the storage pool
func (cs *ControllerServer) GetCapacity(ctx context.Context, req *csi.GetCapacityRequest) (*csi.GetCapacityResponse, error)
{
return nil, status.Error(codes.Unimplemented, "")
}
// ControllerGetCapabilities returns the capabilities of the controller service.
func (cs *ControllerServer) ControllerGetCapabilities(ctx context.Context, req *csi.ControllerGetCapabilitiesRequest) (*csi.ControllerGetCapabilitiesResponse, error)
{
functionControllerServerCapabilities := func(cap csi.ControllerServiceCapability_RPC_Type) *csi.ControllerServiceCapability
{
return &csi.ControllerServiceCapability{
Type: &csi.ControllerServiceCapability_Rpc{
Rpc: &csi.ControllerServiceCapability_RPC{
Type: cap,
},
},
}
}
var controllerServerCapabilities []*csi.ControllerServiceCapability
for _, capability := range []csi.ControllerServiceCapability_RPC_Type{
csi.ControllerServiceCapability_RPC_CREATE_DELETE_VOLUME,
csi.ControllerServiceCapability_RPC_LIST_VOLUMES,
csi.ControllerServiceCapability_RPC_EXPAND_VOLUME,
csi.ControllerServiceCapability_RPC_CREATE_DELETE_SNAPSHOT,
} {
controllerServerCapabilities = append(controllerServerCapabilities, functionControllerServerCapabilities(capability))
}
return &csi.ControllerGetCapabilitiesResponse{
Capabilities: controllerServerCapabilities,
}, nil
}
// CreateSnapshot create snapshot of an existing PV
func (cs *ControllerServer) CreateSnapshot(ctx context.Context, req *csi.CreateSnapshotRequest) (*csi.CreateSnapshotResponse, error)
{
return nil, status.Error(codes.Unimplemented, "")
}
// DeleteSnapshot delete provided snapshot of a PV
func (cs *ControllerServer) DeleteSnapshot(ctx context.Context, req *csi.DeleteSnapshotRequest) (*csi.DeleteSnapshotResponse, error)
{
return nil, status.Error(codes.Unimplemented, "")
}
// ListSnapshots list the snapshots of a PV
func (cs *ControllerServer) ListSnapshots(ctx context.Context, req *csi.ListSnapshotsRequest) (*csi.ListSnapshotsResponse, error)
{
return nil, status.Error(codes.Unimplemented, "")
}
// ControllerExpandVolume resizes a volume
func (cs *ControllerServer) ControllerExpandVolume(ctx context.Context, req *csi.ControllerExpandVolumeRequest) (*csi.ControllerExpandVolumeResponse, error)
{
return nil, status.Error(codes.Unimplemented, "")
}
// ControllerGetVolume get volume info
func (cs *ControllerServer) ControllerGetVolume(ctx context.Context, req *csi.ControllerGetVolumeRequest) (*csi.ControllerGetVolumeResponse, error)
{
return nil, status.Error(codes.Unimplemented, "")
}

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@ -1,137 +0,0 @@
/*
Copyright 2017 The Kubernetes Authors.
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.
*/
package vitastor
import (
"fmt"
"net"
"os"
"strings"
"sync"
"github.com/golang/glog"
"golang.org/x/net/context"
"google.golang.org/grpc"
"github.com/container-storage-interface/spec/lib/go/csi"
"github.com/kubernetes-csi/csi-lib-utils/protosanitizer"
)
// Defines Non blocking GRPC server interfaces
type NonBlockingGRPCServer interface {
// Start services at the endpoint
Start(endpoint string, ids csi.IdentityServer, cs csi.ControllerServer, ns csi.NodeServer)
// Waits for the service to stop
Wait()
// Stops the service gracefully
Stop()
// Stops the service forcefully
ForceStop()
}
func NewNonBlockingGRPCServer() NonBlockingGRPCServer {
return &nonBlockingGRPCServer{}
}
// NonBlocking server
type nonBlockingGRPCServer struct {
wg sync.WaitGroup
server *grpc.Server
}
func (s *nonBlockingGRPCServer) Start(endpoint string, ids csi.IdentityServer, cs csi.ControllerServer, ns csi.NodeServer) {
s.wg.Add(1)
go s.serve(endpoint, ids, cs, ns)
return
}
func (s *nonBlockingGRPCServer) Wait() {
s.wg.Wait()
}
func (s *nonBlockingGRPCServer) Stop() {
s.server.GracefulStop()
}
func (s *nonBlockingGRPCServer) ForceStop() {
s.server.Stop()
}
func (s *nonBlockingGRPCServer) serve(endpoint string, ids csi.IdentityServer, cs csi.ControllerServer, ns csi.NodeServer) {
proto, addr, err := ParseEndpoint(endpoint)
if err != nil {
glog.Fatal(err.Error())
}
if proto == "unix" {
addr = "/" + addr
if err := os.Remove(addr); err != nil && !os.IsNotExist(err) {
glog.Fatalf("Failed to remove %s, error: %s", addr, err.Error())
}
}
listener, err := net.Listen(proto, addr)
if err != nil {
glog.Fatalf("Failed to listen: %v", err)
}
opts := []grpc.ServerOption{
grpc.UnaryInterceptor(logGRPC),
}
server := grpc.NewServer(opts...)
s.server = server
if ids != nil {
csi.RegisterIdentityServer(server, ids)
}
if cs != nil {
csi.RegisterControllerServer(server, cs)
}
if ns != nil {
csi.RegisterNodeServer(server, ns)
}
glog.Infof("Listening for connections on address: %#v", listener.Addr())
server.Serve(listener)
}
func ParseEndpoint(ep string) (string, string, error) {
if strings.HasPrefix(strings.ToLower(ep), "unix://") || strings.HasPrefix(strings.ToLower(ep), "tcp://") {
s := strings.SplitN(ep, "://", 2)
if s[1] != "" {
return s[0], s[1], nil
}
}
return "", "", fmt.Errorf("Invalid endpoint: %v", ep)
}
func logGRPC(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (interface{}, error) {
glog.V(3).Infof("GRPC call: %s", info.FullMethod)
glog.V(5).Infof("GRPC request: %s", protosanitizer.StripSecrets(req))
resp, err := handler(ctx, req)
if err != nil {
glog.Errorf("GRPC error: %v", err)
} else {
glog.V(5).Infof("GRPC response: %s", protosanitizer.StripSecrets(resp))
}
return resp, err
}

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@ -1,60 +0,0 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 or GNU GPL-2.0+ (see README.md for details)
package vitastor
import (
"context"
"github.com/kubernetes-csi/csi-lib-utils/protosanitizer"
"k8s.io/klog"
"github.com/container-storage-interface/spec/lib/go/csi"
)
// IdentityServer struct of Vitastor CSI driver with supported methods of CSI identity server spec.
type IdentityServer struct
{
*Driver
}
// NewIdentityServer create new instance identity
func NewIdentityServer(driver *Driver) *IdentityServer
{
return &IdentityServer{
Driver: driver,
}
}
// GetPluginInfo returns metadata of the plugin
func (is *IdentityServer) GetPluginInfo(ctx context.Context, req *csi.GetPluginInfoRequest) (*csi.GetPluginInfoResponse, error)
{
klog.Infof("received identity plugin info request %+v", protosanitizer.StripSecrets(req))
return &csi.GetPluginInfoResponse{
Name: vitastorCSIDriverName,
VendorVersion: vitastorCSIDriverVersion,
}, nil
}
// GetPluginCapabilities returns available capabilities of the plugin
func (is *IdentityServer) GetPluginCapabilities(ctx context.Context, req *csi.GetPluginCapabilitiesRequest) (*csi.GetPluginCapabilitiesResponse, error)
{
klog.Infof("received identity plugin capabilities request %+v", protosanitizer.StripSecrets(req))
return &csi.GetPluginCapabilitiesResponse{
Capabilities: []*csi.PluginCapability{
{
Type: &csi.PluginCapability_Service_{
Service: &csi.PluginCapability_Service{
Type: csi.PluginCapability_Service_CONTROLLER_SERVICE,
},
},
},
},
}, nil
}
// Probe returns the health and readiness of the plugin
func (is *IdentityServer) Probe(ctx context.Context, req *csi.ProbeRequest) (*csi.ProbeResponse, error)
{
return &csi.ProbeResponse{}, nil
}

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@ -1,279 +0,0 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 or GNU GPL-2.0+ (see README.md for details)
package vitastor
import (
"context"
"os"
"os/exec"
"encoding/json"
"strings"
"bytes"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
"k8s.io/utils/mount"
utilexec "k8s.io/utils/exec"
"github.com/container-storage-interface/spec/lib/go/csi"
"github.com/kubernetes-csi/csi-lib-utils/protosanitizer"
"k8s.io/klog"
)
// NodeServer struct of Vitastor CSI driver with supported methods of CSI node server spec.
type NodeServer struct
{
*Driver
mounter mount.Interface
}
// NewNodeServer create new instance node
func NewNodeServer(driver *Driver) *NodeServer
{
return &NodeServer{
Driver: driver,
mounter: mount.New(""),
}
}
// NodeStageVolume mounts the volume to a staging path on the node.
func (ns *NodeServer) NodeStageVolume(ctx context.Context, req *csi.NodeStageVolumeRequest) (*csi.NodeStageVolumeResponse, error)
{
return &csi.NodeStageVolumeResponse{}, nil
}
// NodeUnstageVolume unstages the volume from the staging path
func (ns *NodeServer) NodeUnstageVolume(ctx context.Context, req *csi.NodeUnstageVolumeRequest) (*csi.NodeUnstageVolumeResponse, error)
{
return &csi.NodeUnstageVolumeResponse{}, nil
}
func Contains(list []string, s string) bool
{
for i := 0; i < len(list); i++
{
if (list[i] == s)
{
return true
}
}
return false
}
// NodePublishVolume mounts the volume mounted to the staging path to the target path
func (ns *NodeServer) NodePublishVolume(ctx context.Context, req *csi.NodePublishVolumeRequest) (*csi.NodePublishVolumeResponse, error)
{
klog.Infof("received node publish volume request %+v", protosanitizer.StripSecrets(req))
targetPath := req.GetTargetPath()
// Check that it's not already mounted
free, error := mount.IsNotMountPoint(ns.mounter, targetPath)
if (error != nil)
{
if (os.IsNotExist(error))
{
error := os.MkdirAll(targetPath, 0777)
if (error != nil)
{
return nil, status.Error(codes.Internal, error.Error())
}
free = true
}
else
{
return nil, status.Error(codes.Internal, error.Error())
}
}
if (!free)
{
return &csi.NodePublishVolumeResponse{}, nil
}
ctxVars := make(map[string]string)
err := json.Unmarshal([]byte(req.VolumeId), &ctxVars)
if (err != nil)
{
return nil, status.Error(codes.Internal, "volume ID not in JSON format")
}
volName := ctxVars["name"]
_, etcdUrl, etcdPrefix := GetConnectionParams(ctxVars)
if (len(etcdUrl) == 0)
{
return nil, status.Error(codes.InvalidArgument, "no etcdUrl in storage class configuration and no etcd_address in vitastor.conf")
}
// Map NBD device
// FIXME: Check if already mapped
args := []string{
"map", "--etcd_address", strings.Join(etcdUrl, ","),
"--etcd_prefix", etcdPrefix,
"--image", volName,
};
if (ctxVars["configPath"] != "")
{
args = append(args, "--config_path", ctxVars["configPath"])
}
if (req.GetReadonly())
{
args = append(args, "--readonly", "1")
}
c := exec.Command("/usr/bin/vitastor-nbd", args...)
var stdout, stderr bytes.Buffer
c.Stdout, c.Stderr = &stdout, &stderr
err = c.Run()
stdoutStr, stderrStr := string(stdout.Bytes()), string(stderr.Bytes())
if (err != nil)
{
klog.Errorf("vitastor-nbd map failed: %s, status %s\n", stdoutStr+stderrStr, err)
return nil, status.Error(codes.Internal, stdoutStr+stderrStr+" (status "+err.Error()+")")
}
devicePath := strings.TrimSpace(stdoutStr)
// Check existing format
diskMounter := &mount.SafeFormatAndMount{Interface: ns.mounter, Exec: utilexec.New()}
existingFormat, err := diskMounter.GetDiskFormat(devicePath)
if (err != nil)
{
klog.Errorf("failed to get disk format for path %s, error: %v", err)
// unmap NBD device
unmapOut, unmapErr := exec.Command("/usr/bin/vitastor-nbd", "unmap", devicePath).CombinedOutput()
if (unmapErr != nil)
{
klog.Errorf("failed to unmap NBD device %s: %s, error: %v", devicePath, unmapOut, unmapErr)
}
return nil, err
}
// Format the device (ext4 or xfs)
fsType := req.GetVolumeCapability().GetMount().GetFsType()
isBlock := req.GetVolumeCapability().GetBlock() != nil
opt := req.GetVolumeCapability().GetMount().GetMountFlags()
opt = append(opt, "_netdev")
if ((req.VolumeCapability.AccessMode.Mode == csi.VolumeCapability_AccessMode_MULTI_NODE_READER_ONLY ||
req.VolumeCapability.AccessMode.Mode == csi.VolumeCapability_AccessMode_SINGLE_NODE_READER_ONLY) &&
!Contains(opt, "ro"))
{
opt = append(opt, "ro")
}
if (fsType == "xfs")
{
opt = append(opt, "nouuid")
}
readOnly := Contains(opt, "ro")
if (existingFormat == "" && !readOnly)
{
args := []string{}
switch fsType
{
case "ext4":
args = []string{"-m0", "-Enodiscard,lazy_itable_init=1,lazy_journal_init=1", devicePath}
case "xfs":
args = []string{"-K", devicePath}
}
if (len(args) > 0)
{
cmdOut, cmdErr := diskMounter.Exec.Command("mkfs."+fsType, args...).CombinedOutput()
if (cmdErr != nil)
{
klog.Errorf("failed to run mkfs error: %v, output: %v", cmdErr, string(cmdOut))
// unmap NBD device
unmapOut, unmapErr := exec.Command("/usr/bin/vitastor-nbd", "unmap", devicePath).CombinedOutput()
if (unmapErr != nil)
{
klog.Errorf("failed to unmap NBD device %s: %s, error: %v", devicePath, unmapOut, unmapErr)
}
return nil, status.Error(codes.Internal, cmdErr.Error())
}
}
}
if (isBlock)
{
opt = append(opt, "bind")
err = diskMounter.Mount(devicePath, targetPath, fsType, opt)
}
else
{
err = diskMounter.FormatAndMount(devicePath, targetPath, fsType, opt)
}
if (err != nil)
{
klog.Errorf(
"failed to mount device path (%s) to path (%s) for volume (%s) error: %s",
devicePath, targetPath, volName, err,
)
// unmap NBD device
unmapOut, unmapErr := exec.Command("/usr/bin/vitastor-nbd", "unmap", devicePath).CombinedOutput()
if (unmapErr != nil)
{
klog.Errorf("failed to unmap NBD device %s: %s, error: %v", devicePath, unmapOut, unmapErr)
}
return nil, status.Error(codes.Internal, err.Error())
}
return &csi.NodePublishVolumeResponse{}, nil
}
// NodeUnpublishVolume unmounts the volume from the target path
func (ns *NodeServer) NodeUnpublishVolume(ctx context.Context, req *csi.NodeUnpublishVolumeRequest) (*csi.NodeUnpublishVolumeResponse, error)
{
klog.Infof("received node unpublish volume request %+v", protosanitizer.StripSecrets(req))
targetPath := req.GetTargetPath()
devicePath, refCount, err := mount.GetDeviceNameFromMount(ns.mounter, targetPath)
if (err != nil)
{
if (os.IsNotExist(err))
{
return nil, status.Error(codes.NotFound, "Target path not found")
}
return nil, status.Error(codes.Internal, err.Error())
}
if (devicePath == "")
{
return nil, status.Error(codes.NotFound, "Volume not mounted")
}
// unmount
err = mount.CleanupMountPoint(targetPath, ns.mounter, false)
if (err != nil)
{
return nil, status.Error(codes.Internal, err.Error())
}
// unmap NBD device
if (refCount == 1)
{
unmapOut, unmapErr := exec.Command("/usr/bin/vitastor-nbd", "unmap", devicePath).CombinedOutput()
if (unmapErr != nil)
{
klog.Errorf("failed to unmap NBD device %s: %s, error: %v", devicePath, unmapOut, unmapErr)
}
}
return &csi.NodeUnpublishVolumeResponse{}, nil
}
// NodeGetVolumeStats returns volume capacity statistics available for the volume
func (ns *NodeServer) NodeGetVolumeStats(ctx context.Context, req *csi.NodeGetVolumeStatsRequest) (*csi.NodeGetVolumeStatsResponse, error)
{
return nil, status.Error(codes.Unimplemented, "")
}
// NodeExpandVolume expanding the file system on the node
func (ns *NodeServer) NodeExpandVolume(ctx context.Context, req *csi.NodeExpandVolumeRequest) (*csi.NodeExpandVolumeResponse, error)
{
return nil, status.Error(codes.Unimplemented, "")
}
// NodeGetCapabilities returns the supported capabilities of the node server
func (ns *NodeServer) NodeGetCapabilities(ctx context.Context, req *csi.NodeGetCapabilitiesRequest) (*csi.NodeGetCapabilitiesResponse, error)
{
return &csi.NodeGetCapabilitiesResponse{}, nil
}
// NodeGetInfo returns NodeGetInfoResponse for CO.
func (ns *NodeServer) NodeGetInfo(ctx context.Context, req *csi.NodeGetInfoRequest) (*csi.NodeGetInfoResponse, error)
{
klog.Infof("received node get info request %+v", protosanitizer.StripSecrets(req))
return &csi.NodeGetInfoResponse{
NodeId: ns.NodeID,
}, nil
}

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@ -1,36 +0,0 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 or GNU GPL-2.0+ (see README.md for details)
package vitastor
import (
"k8s.io/klog"
)
type Driver struct
{
*Config
}
// NewDriver create new instance driver
func NewDriver(config *Config) (*Driver, error)
{
if (config == nil)
{
klog.Errorf("Vitastor CSI driver initialization failed")
return nil, nil
}
driver := &Driver{
Config: config,
}
klog.Infof("Vitastor CSI driver initialized")
return driver, nil
}
// Start server
func (driver *Driver) Run()
{
server := NewNonBlockingGRPCServer()
server.Start(driver.Endpoint, NewIdentityServer(driver), NewControllerServer(driver), NewNodeServer(driver))
server.Wait()
}

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@ -1,39 +0,0 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 or GNU GPL-2.0+ (see README.md for details)
package main
import (
"flag"
"fmt"
"os"
"k8s.io/klog"
"vitastor.io/csi/src"
)
func main()
{
var config = vitastor.NewConfig()
flag.StringVar(&config.Endpoint, "endpoint", "", "CSI endpoint")
flag.StringVar(&config.NodeID, "node", "", "Node ID")
flag.Parse()
if (config.Endpoint == "")
{
config.Endpoint = os.Getenv("CSI_ENDPOINT")
}
if (config.NodeID == "")
{
config.NodeID = os.Getenv("NODE_ID")
}
if (config.Endpoint == "" && config.NodeID == "")
{
fmt.Fprintf(os.Stderr, "Please set -endpoint and -node / CSI_ENDPOINT & NODE_ID env vars\n")
os.Exit(1)
}
drv, err := vitastor.NewDriver(config)
if (err != nil)
{
klog.Fatalln(err)
}
drv.Run()
}

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@ -1,7 +0,0 @@
#!/bin/bash
sed 's/$REL/bullseye/g' < vitastor.Dockerfile > ../Dockerfile
cd ..
mkdir -p packages
sudo podman build -v `pwd`/packages:/root/packages -f Dockerfile .
rm Dockerfile

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@ -1,7 +0,0 @@
#!/bin/bash
sed 's/$REL/buster/g' < vitastor.Dockerfile > ../Dockerfile
cd ..
mkdir -p packages
sudo podman build -v `pwd`/packages:/root/packages -f Dockerfile .
rm Dockerfile

27
debian/changelog vendored
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@ -1,27 +0,0 @@
vitastor (0.6.5-1) unstable; urgency=medium
* RDMA support
* Bugfixes
-- Vitaliy Filippov <vitalif@yourcmc.ru> Sat, 01 May 2021 18:46:10 +0300
vitastor (0.6.0-1) unstable; urgency=medium
* Snapshots and Copy-on-Write clones
* Image metadata in etcd (name, size)
* Image I/O and space statistics in etcd
* Write throttling for smoothing random write workloads in SSD+HDD configurations
-- Vitaliy Filippov <vitalif@yourcmc.ru> Sun, 11 Apr 2021 00:49:18 +0300
vitastor (0.5.1-1) unstable; urgency=medium
* Add jerasure support
-- Vitaliy Filippov <vitalif@yourcmc.ru> Sat, 05 Dec 2020 17:02:26 +0300
vitastor (0.5-1) unstable; urgency=medium
* First packaging for Debian
-- Vitaliy Filippov <vitalif@yourcmc.ru> Thu, 05 Nov 2020 02:20:59 +0300

1
debian/compat vendored
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@ -1 +0,0 @@
13

17
debian/control vendored
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@ -1,17 +0,0 @@
Source: vitastor
Section: admin
Priority: optional
Maintainer: Vitaliy Filippov <vitalif@yourcmc.ru>
Build-Depends: debhelper, liburing-dev (>= 0.6), g++ (>= 8), libstdc++6 (>= 8), linux-libc-dev, libgoogle-perftools-dev, libjerasure-dev, libgf-complete-dev, libibverbs-dev
Standards-Version: 4.5.0
Homepage: https://vitastor.io/
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
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).

21
debian/copyright vendored
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@ -1,21 +0,0 @@
Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: vitastor
Upstream-Contact: Vitaliy Filippov <vitalif@yourcmc.ru>
Source: https://vitastor.io
Files: *
Copyright: 2019+ Vitaliy Filippov <vitalif@yourcmc.ru>
License: Multiple licenses VNPL-1.1 and/or GPL-2.0+
All server-side code (OSD, Monitor and so on) is licensed under the terms of
Vitastor Network Public License 1.1 (VNPL 1.1), a copyleft license based on
GNU GPLv3.0 with the additional "Network Interaction" clause which requires
opensourcing all programs directly or indirectly interacting with Vitastor
through a computer network and expressly designed to be used in conjunction
with it ("Proxy Programs"). Proxy Programs may be made public not only under
the terms of the same license, but also under the terms of any GPL-Compatible
Free Software License, as listed by the Free Software Foundation.
This is a stricter copyleft license than the Affero GPL.
.
Client libraries (cluster_client and so on) are dual-licensed under the same
VNPL 1.1 and also GNU GPL 2.0 or later to allow for compatibility with GPLed
software like QEMU and fio.

3
debian/install vendored
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@ -1,3 +0,0 @@
VNPL-1.1.txt usr/share/doc/vitastor
GPL-2.0.txt usr/share/doc/vitastor
mon usr/lib/vitastor

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@ -1,50 +0,0 @@
# 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 .
FROM debian:$REL
WORKDIR /root
RUN if [ "$REL" = "buster" ]; then \
echo 'deb http://deb.debian.org/debian buster-backports main' >> /etc/apt/sources.list; \
echo >> /etc/apt/preferences; \
echo 'Package: *' >> /etc/apt/preferences; \
echo 'Pin: release a=buster-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; \
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 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/
RUN set -e; \
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; \
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-*/; \
V=$(head -n1 debian/changelog | perl -pe 's/^.*\((.*?)(~bpo[\d\+]*)?\).*$/$1/')+vitastor1; \
DEBFULLNAME="Vitaliy Filippov <vitalif@yourcmc.ru>" dch -D $REL -v $V 'Plug Vitastor block driver'; \
DEB_BUILD_OPTIONS=nocheck dpkg-buildpackage --jobs=auto -sa; \
rm -rf /root/packages/qemu-$REL/qemu-*/

9
debian/rules vendored
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@ -1,9 +0,0 @@
#!/usr/bin/make -f
export DH_VERBOSE = 1
%:
dh $@
override_dh_installdeb:
cat debian/substvars >> debian/vitastor.substvars
dh_installdeb

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@ -1 +0,0 @@
3.0 (quilt)

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

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@ -1,67 +0,0 @@
# 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 .
FROM debian:$REL
WORKDIR /root
RUN if [ "$REL" = "buster" ]; then \
echo 'deb http://deb.debian.org/debian buster-backports main' >> /etc/apt/sources.list; \
echo >> /etc/apt/preferences; \
echo 'Package: *' >> /etc/apt/preferences; \
echo 'Pin: release a=buster-backports' >> /etc/apt/preferences; \
echo 'Pin-Priority: 500' >> /etc/apt/preferences; \
fi; \
grep '^deb ' /etc/apt/sources.list | perl -pe 's/^deb/deb-src/' >> /etc/apt/sources.list; \
echo 'APT::Install-Recommends false;' >> /etc/apt/apt.conf; \
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 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
ADD . /root/vitastor
RUN set -e -x; \
mkdir -p /root/fio-build/; \
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-$REL; \
cp -r /root/vitastor vitastor-0.6.5; \
ln -s /root/packages/qemu-$REL/qemu-*/ vitastor-0.6.5/qemu; \
ln -s /root/fio-build/fio-*/ vitastor-0.6.5/fio; \
cd vitastor-0.6.5; \
FIO=$(head -n1 fio/debian/changelog | perl -pe 's/^.*\((.*?)\).*$/$1/'); \
QEMU=$(head -n1 qemu/debian/changelog | perl -pe 's/^.*\((.*?)\).*$/$1/'); \
sh copy-qemu-includes.sh; \
sh copy-fio-includes.sh; \
rm qemu fio; \
mkdir -p a b debian/patches; \
mv qemu-copy b/qemu; \
mv fio-copy b/fio; \
diff -NaurpbB a b > debian/patches/qemu-fio-headers.patch || true; \
echo qemu-fio-headers.patch >> debian/patches/series; \
rm -rf a b; \
rm -rf /root/packages/qemu-$REL/qemu*/; \
echo "dep:fio=$FIO" > debian/substvars; \
echo "dep:qemu=$QEMU" >> debian/substvars; \
cd /root/packages/vitastor-$REL; \
tar --sort=name --mtime='2020-01-01' --owner=0 --group=0 --exclude=debian -cJf vitastor_0.6.5.orig.tar.xz vitastor-0.6.5; \
cd vitastor-0.6.5; \
V=$(head -n1 debian/changelog | perl -pe 's/^.*\((.*?)\).*$/$1/'); \
DEBFULLNAME="Vitaliy Filippov <vitalif@yourcmc.ru>" dch -D $REL -v "$V""$REL" "Rebuild for $REL"; \
DEB_BUILD_OPTIONS=nocheck dpkg-buildpackage --jobs=auto -sa; \
rm -rf /root/packages/vitastor-$REL/vitastor-*/

165
dump_journal.cpp Normal file
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#define _LARGEFILE64_SOURCE
#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdint.h>
#include <malloc.h>
#include <linux/fs.h>
#include <string.h>
#include <errno.h>
#include <assert.h>
#include <stdio.h>
#include "blockstore_impl.h"
#include "crc32c.h"
struct journal_dump_t
{
char *journal_device;
uint32_t journal_block;
uint64_t journal_offset;
uint64_t journal_len;
uint64_t journal_pos;
int fd;
void dump_block(void *buf);
};
int main(int argc, char *argv[])
{
if (argc < 5)
{
printf("USAGE: %s <journal_file> <journal_block_size> <offset> <size>\n", argv[0]);
return 1;
}
journal_dump_t self;
self.journal_device = argv[1];
self.journal_block = strtoul(argv[2], NULL, 10);
self.journal_offset = strtoull(argv[3], NULL, 10);
self.journal_len = strtoull(argv[4], NULL, 10);
if (self.journal_block < MEM_ALIGNMENT || (self.journal_block % MEM_ALIGNMENT) ||
self.journal_block > 128*1024)
{
printf("Invalid journal block size\n");
return 1;
}
self.fd = open(self.journal_device, O_DIRECT|O_RDONLY);
if (self.fd == -1)
{
printf("Failed to open journal\n");
return 1;
}
void *data = memalign(MEM_ALIGNMENT, self.journal_block);
self.journal_pos = 0;
while (self.journal_pos < self.journal_len)
{
int r = pread(self.fd, data, self.journal_block, self.journal_offset+self.journal_pos);
assert(r == self.journal_block);
uint64_t s;
for (s = 0; s < self.journal_block; s += 8)
{
if (*((uint64_t*)(data+s)) != 0)
break;
}
if (s == self.journal_block)
{
printf("offset %08lx: zeroes\n", self.journal_pos);
self.journal_pos += self.journal_block;
}
else if (((journal_entry*)data)->magic == JOURNAL_MAGIC)
{
printf("offset %08lx:\n", self.journal_pos);
self.dump_block(data);
}
else
{
printf("offset %08lx: no magic in the beginning, looks like random data (pattern=%lx)\n", self.journal_pos, *((uint64_t*)data));
self.journal_pos += self.journal_block;
}
}
free(data);
close(self.fd);
return 0;
}
void journal_dump_t::dump_block(void *buf)
{
uint32_t pos = 0;
journal_pos += journal_block;
int entry = 0;
bool wrapped = false;
while (pos < journal_block)
{
journal_entry *je = (journal_entry*)(buf + pos);
if (je->magic != JOURNAL_MAGIC || je->type < JE_START || je->type > JE_DELETE)
{
break;
}
const char *crc32_valid = je_crc32(je) == je->crc32 ? "(valid)" : "(invalid)";
printf("entry % 3d: crc32=%08x %s prev=%08x ", entry, je->crc32, crc32_valid, je->crc32_prev);
if (je->type == JE_START)
{
printf("je_start start=%08lx\n", je->start.journal_start);
}
else if (je->type == JE_SMALL_WRITE)
{
printf(
"je_small_write oid=%lu:%lu ver=%lu offset=%u len=%u loc=%08lx",
je->small_write.oid.inode, je->small_write.oid.stripe,
je->small_write.version, je->small_write.offset, je->small_write.len,
je->small_write.data_offset
);
if (journal_pos + je->small_write.len > journal_len)
{
// data continues from the beginning of the journal
journal_pos = journal_block;
wrapped = true;
}
if (journal_pos != je->small_write.data_offset)
{
printf(" (mismatched, calculated = %lu)", journal_pos);
}
journal_pos += je->small_write.len;
if (journal_pos >= journal_len)
{
journal_pos = journal_block;
wrapped = true;
}
uint32_t data_crc32 = 0;
void *data = memalign(MEM_ALIGNMENT, je->small_write.len);
assert(pread(fd, data, je->small_write.len, journal_offset+je->small_write.data_offset) == je->small_write.len);
data_crc32 = crc32c(0, data, je->small_write.len);
free(data);
printf(
" data_crc32=%08x%s", je->small_write.crc32_data,
(data_crc32 != je->small_write.crc32_data) ? " (invalid)" : " (valid)"
);
printf("\n");
}
else if (je->type == JE_BIG_WRITE)
{
printf("je_big_write oid=%lu:%lu ver=%lu loc=%08lx\n", je->big_write.oid.inode, je->big_write.oid.stripe, je->big_write.version, je->big_write.location);
}
else if (je->type == JE_STABLE)
{
printf("je_stable oid=%lu:%lu ver=%lu\n", je->stable.oid.inode, je->stable.oid.stripe, je->stable.version);
}
else if (je->type == JE_ROLLBACK)
{
printf("je_rollback oid=%lu:%lu ver=%lu\n", je->rollback.oid.inode, je->rollback.oid.stripe, je->rollback.version);
}
else if (je->type == JE_DELETE)
{
printf("je_delete oid=%lu:%lu ver=%lu\n", je->del.oid.inode, je->del.oid.stripe, je->del.version);
}
pos += je->size;
entry++;
}
if (wrapped)
{
journal_pos = journal_len;
}
}

374
etcd_state_client.cpp Normal file
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#include "osd_ops.h"
#include "pg_states.h"
#include "etcd_state_client.h"
#include "http_client.h"
#include "base64.h"
json_kv_t etcd_state_client_t::parse_etcd_kv(const json11::Json & kv_json)
{
json_kv_t kv;
kv.key = base64_decode(kv_json["key"].string_value());
std::string json_err, json_text = base64_decode(kv_json["value"].string_value());
kv.value = json_text == "" ? json11::Json() : json11::Json::parse(json_text, json_err);
if (json_err != "")
{
printf("Bad JSON in etcd key %s: %s (value: %s)\n", kv.key.c_str(), json_err.c_str(), json_text.c_str());
kv.key = "";
}
return kv;
}
void etcd_state_client_t::etcd_txn(json11::Json txn, int timeout, std::function<void(std::string, json11::Json)> callback)
{
etcd_call("/kv/txn", txn, timeout, callback);
}
void etcd_state_client_t::etcd_call(std::string api, json11::Json payload, int timeout, std::function<void(std::string, json11::Json)> callback)
{
std::string etcd_address = etcd_addresses[rand() % etcd_addresses.size()];
std::string etcd_api_path;
int pos = etcd_address.find('/');
if (pos >= 0)
{
etcd_api_path = etcd_address.substr(pos);
etcd_address = etcd_address.substr(0, pos);
}
std::string req = payload.dump();
req = "POST "+etcd_api_path+api+" HTTP/1.1\r\n"
"Host: "+etcd_address+"\r\n"
"Content-Type: application/json\r\n"
"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);
}
void etcd_state_client_t::start_etcd_watcher()
{
std::string etcd_address = etcd_addresses[rand() % etcd_addresses.size()];
std::string etcd_api_path;
int pos = etcd_address.find('/');
if (pos >= 0)
{
etcd_api_path = etcd_address.substr(pos);
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)
{
if (msg->body.length())
{
std::string json_err;
json11::Json data = json11::Json::parse(msg->body, json_err);
if (json_err != "")
{
printf("Bad JSON in etcd event: %s, ignoring event\n", json_err.c_str());
}
else
{
if (data["result"]["created"].bool_value())
{
etcd_watches_initialised++;
}
if (etcd_watches_initialised == 4)
{
etcd_watch_revision = data["result"]["header"]["revision"].uint64_value();
}
// First gather all changes into a hash to remove multiple overwrites
json11::Json::object changes;
for (auto & ev: data["result"]["events"].array_items())
{
auto kv = parse_etcd_kv(ev["kv"]);
if (kv.key != "")
{
changes[kv.key] = kv.value;
}
}
for (auto & kv: changes)
{
if (this->log_level > 0)
{
printf("Incoming event: %s -> %s\n", kv.first.c_str(), kv.second.dump().c_str());
}
parse_state(kv.first, kv.second);
}
// React to changes
on_change_hook(changes);
}
}
if (msg->eof)
{
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)
{
start_etcd_watcher();
});
}
else
{
// Connection was live, retry immediately
start_etcd_watcher();
}
}
});
etcd_watch_ws->post_message(WS_TEXT, json11::Json(json11::Json::object {
{ "create_request", json11::Json::object {
{ "key", base64_encode(etcd_prefix+"/config/") },
{ "range_end", base64_encode(etcd_prefix+"/config0") },
{ "start_revision", etcd_watch_revision+1 },
{ "watch_id", ETCD_CONFIG_WATCH_ID },
} }
}).dump());
etcd_watch_ws->post_message(WS_TEXT, json11::Json(json11::Json::object {
{ "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 },
{ "watch_id", ETCD_OSD_STATE_WATCH_ID },
} }
}).dump());
etcd_watch_ws->post_message(WS_TEXT, json11::Json(json11::Json::object {
{ "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 },
{ "watch_id", ETCD_PG_STATE_WATCH_ID },
} }
}).dump());
etcd_watch_ws->post_message(WS_TEXT, json11::Json(json11::Json::object {
{ "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 },
{ "watch_id", ETCD_PG_HISTORY_WATCH_ID },
} }
}).dump());
}
void etcd_state_client_t::load_global_config()
{
etcd_call("/kv/range", json11::Json::object {
{ "key", base64_encode(etcd_prefix+"/config/global") }
}, ETCD_SLOW_TIMEOUT, [this](std::string err, json11::Json data)
{
if (err != "")
{
printf("Error reading OSD configuration from etcd: %s\n", err.c_str());
tfd->set_timer(ETCD_SLOW_TIMEOUT, false, [this](int timer_id)
{
load_global_config();
});
return;
}
if (!etcd_watch_revision)
{
etcd_watch_revision = data["header"]["revision"].uint64_value();
}
json11::Json::object global_config;
if (data["kvs"].array_items().size() > 0)
{
auto kv = parse_etcd_kv(data["kvs"][0]);
if (kv.value.is_object())
{
global_config = kv.value.object_items();
}
}
on_load_config_hook(global_config);
});
}
void etcd_state_client_t::load_pgs()
{
json11::Json::array txn = {
json11::Json::object {
{ "request_range", json11::Json::object {
{ "key", base64_encode(etcd_prefix+"/config/pgs") },
} }
},
json11::Json::object {
{ "request_range", json11::Json::object {
{ "key", base64_encode(etcd_prefix+"/pg/history/") },
{ "range_end", base64_encode(etcd_prefix+"/pg/history0") },
} }
},
json11::Json::object {
{ "request_range", json11::Json::object {
{ "key", base64_encode(etcd_prefix+"/pg/state/") },
{ "range_end", base64_encode(etcd_prefix+"/pg/state0") },
} }
},
json11::Json::object {
{ "request_range", json11::Json::object {
{ "key", base64_encode(etcd_prefix+"/osd/state/") },
{ "range_end", base64_encode(etcd_prefix+"/osd/state0") },
} }
},
};
json11::Json::object req = { { "success", txn } };
json11::Json checks = load_pgs_checks_hook();
if (checks.array_items().size() > 0)
{
req["compare"] = checks;
}
etcd_txn(req, ETCD_SLOW_TIMEOUT, [this](std::string err, json11::Json data)
{
if (err != "")
{
printf("Error loading PGs from etcd: %s\n", err.c_str());
tfd->set_timer(ETCD_SLOW_TIMEOUT, false, [this](int timer_id)
{
load_pgs();
});
return;
}
if (!data["succeeded"].bool_value())
{
on_load_pgs_hook(false);
return;
}
for (auto & res: data["responses"].array_items())
{
for (auto & kv_json: res["response_range"]["kvs"].array_items())
{
auto kv = parse_etcd_kv(kv_json);
parse_state(kv.key, kv.value);
}
}
on_load_pgs_hook(true);
});
}
void etcd_state_client_t::parse_state(const std::string & key, const json11::Json & value)
{
if (key == etcd_prefix+"/config/pgs")
{
for (auto & pg_item: this->pg_config)
{
pg_item.second.exists = false;
}
for (auto & pg_item: value["items"].object_items())
{
pg_num_t pg_num = stoull_full(pg_item.first);
if (!pg_num)
{
printf("Bad key in PG configuration: %s (must be a number), skipped\n", pg_item.first.c_str());
continue;
}
this->pg_config[pg_num].exists = true;
this->pg_config[pg_num].pause = pg_item.second["pause"].bool_value();
this->pg_config[pg_num].primary = pg_item.second["primary"].uint64_value();
this->pg_config[pg_num].target_set.clear();
for (auto pg_osd: pg_item.second["osd_set"].array_items())
{
this->pg_config[pg_num].target_set.push_back(pg_osd.uint64_value());
}
if (this->pg_config[pg_num].target_set.size() != 3)
{
printf("Bad PG %u config format: incorrect osd_set = %s\n", pg_num, pg_item.second["osd_set"].dump().c_str());
this->pg_config[pg_num].target_set.resize(3);
this->pg_config[pg_num].pause = true;
}
}
}
else if (key.substr(0, etcd_prefix.length()+12) == etcd_prefix+"/pg/history/")
{
// <etcd_prefix>/pg/history/%d
pg_num_t pg_num = stoull_full(key.substr(etcd_prefix.length()+12));
if (!pg_num)
{
printf("Bad etcd key %s, ignoring\n", key.c_str());
}
else
{
auto & pg_cfg = this->pg_config[pg_num];
pg_cfg.target_history.clear();
pg_cfg.all_peers.clear();
// Refuse to start PG if any set of the <osd_sets> has no live OSDs
for (auto hist_item: value["osd_sets"].array_items())
{
std::vector<osd_num_t> history_set;
for (auto pg_osd: hist_item.array_items())
{
history_set.push_back(pg_osd.uint64_value());
}
pg_cfg.target_history.push_back(history_set);
}
// Include these additional OSDs when peering the PG
for (auto pg_osd: value["all_peers"].array_items())
{
pg_cfg.all_peers.push_back(pg_osd.uint64_value());
}
}
}
else if (key.substr(0, etcd_prefix.length()+10) == etcd_prefix+"/pg/state/")
{
// <etcd_prefix>/pg/state/%d
pg_num_t pg_num = stoull_full(key.substr(etcd_prefix.length()+10));
if (!pg_num)
{
printf("Bad etcd key %s, ignoring\n", key.c_str());
}
else if (value.is_null())
{
this->pg_config[pg_num].cur_primary = 0;
this->pg_config[pg_num].cur_state = 0;
}
else
{
osd_num_t cur_primary = value["primary"].uint64_value();
int state = 0;
for (auto & e: value["state"].array_items())
{
int i;
for (i = 0; i < pg_state_bit_count; i++)
{
if (e.string_value() == pg_state_names[i])
{
state = state | pg_state_bits[i];
break;
}
}
if (i >= pg_state_bit_count)
{
printf("Unexpected PG %u state keyword in etcd: %s\n", pg_num, e.dump().c_str());
return;
}
}
if (!cur_primary || !value["state"].is_array() || !state ||
(state & PG_OFFLINE) && state != PG_OFFLINE ||
(state & PG_PEERING) && state != PG_PEERING ||
(state & PG_INCOMPLETE) && state != PG_INCOMPLETE)
{
printf("Unexpected PG %u state in etcd: primary=%lu, state=%s\n", pg_num, cur_primary, value["state"].dump().c_str());
return;
}
this->pg_config[pg_num].cur_primary = cur_primary;
this->pg_config[pg_num].cur_state = state;
}
}
else if (key.substr(0, etcd_prefix.length()+11) == etcd_prefix+"/osd/state/")
{
// <etcd_prefix>/osd/state/%d
osd_num_t peer_osd = std::stoull(key.substr(etcd_prefix.length()+11));
if (peer_osd > 0)
{
if (value.is_object() && value["state"] == "up" &&
value["addresses"].is_array() &&
value["port"].int64_value() > 0 && value["port"].int64_value() < 65536)
{
this->peer_states[peer_osd] = value;
}
else
{
this->peer_states.erase(peer_osd);
}
if (on_change_osd_state_hook != NULL)
{
on_change_osd_state_hook(peer_osd);
}
}
}
}

59
etcd_state_client.h Normal file
View File

@ -0,0 +1,59 @@
#pragma once
#include "http_client.h"
#include "timerfd_manager.h"
#define ETCD_CONFIG_WATCH_ID 1
#define ETCD_PG_STATE_WATCH_ID 2
#define ETCD_PG_HISTORY_WATCH_ID 3
#define ETCD_OSD_STATE_WATCH_ID 4
#define MAX_ETCD_ATTEMPTS 5
#define ETCD_SLOW_TIMEOUT 5000
#define ETCD_QUICK_TIMEOUT 1000
struct pg_config_t
{
bool exists;
osd_num_t primary;
std::vector<osd_num_t> target_set;
std::vector<std::vector<osd_num_t>> target_history;
std::vector<osd_num_t> all_peers;
bool pause;
osd_num_t cur_primary;
int cur_state;
};
struct json_kv_t
{
std::string key;
json11::Json value;
};
struct etcd_state_client_t
{
std::vector<std::string> etcd_addresses;
std::string etcd_prefix;
int log_level = 0;
timerfd_manager_t *tfd = NULL;
int etcd_watches_initialised = 0;
uint64_t etcd_watch_revision = 0;
websocket_t *etcd_watch_ws = NULL;
std::map<pg_num_t, pg_config_t> pg_config;
std::map<osd_num_t, json11::Json> peer_states;
std::function<void(json11::Json::object &)> on_change_hook;
std::function<void(json11::Json::object &)> on_load_config_hook;
std::function<json11::Json()> load_pgs_checks_hook;
std::function<void(bool)> on_load_pgs_hook;
std::function<void(uint64_t)> on_change_osd_state_hook;
json_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);
void start_etcd_watcher();
void load_global_config();
void load_pgs();
void parse_state(const std::string & key, const json11::Json & value);
};

View File

@ -1,6 +1,3 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
// FIO engine to test Blockstore
//
// Initialize storage for tests:
@ -25,15 +22,18 @@
// -bs_config='{"data_device":"./test_data.bin"}' -size=1000M
#include "blockstore.h"
#include "epoll_manager.h"
#include "fio_headers.h"
extern "C" {
#define CONFIG_HAVE_GETTID
#define CONFIG_PWRITEV2
#include "fio/fio.h"
#include "fio/optgroup.h"
}
#include "json11/json11.hpp"
struct bs_data
{
blockstore_t *bs;
epoll_manager_t *epmgr;
ring_loop_t *ringloop;
/* The list of completed io_u structs. */
std::vector<io_u*> completed;
@ -106,7 +106,6 @@ static void bs_cleanup(struct thread_data *td)
}
safe:
delete bsd->bs;
delete bsd->epmgr;
delete bsd->ringloop;
delete bsd;
}
@ -132,8 +131,7 @@ static int bs_init(struct thread_data *td)
}
}
bsd->ringloop = new ring_loop_t(512);
bsd->epmgr = new epoll_manager_t(bsd->ringloop);
bsd->bs = new blockstore_t(config, bsd->ringloop, bsd->epmgr->tfd);
bsd->bs = new blockstore_t(config, bsd->ringloop);
while (1)
{
bsd->ringloop->loop();
@ -292,7 +290,7 @@ static int bs_invalidate(struct thread_data *td, struct fio_file *f)
}
struct ioengine_ops ioengine = {
.name = "vitastor_blockstore",
.name = "microceph_blockstore",
.version = FIO_IOOPS_VERSION,
.flags = FIO_MEMALIGN | FIO_DISKLESSIO | FIO_NOEXTEND,
.setup = bs_setup,

View File

@ -1,6 +1,3 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 or GNU GPL-2.0+ (see README.md for details)
// FIO engine to test Blockstore through Secondary OSD interface
//
// Prepare storage like in fio_engine.cpp, then start OSD with ./osd, then test it
@ -8,7 +5,7 @@
// Random write:
//
// fio -thread -ioengine=./libfio_sec_osd.so -name=test -bs=4k -direct=1 -fsync=16 -iodepth=16 -rw=randwrite \
// -host=127.0.0.1 -port=11203 [-block_size_order=17] [-single_primary=1] -size=1000M
// -host=127.0.0.1 -port=11203 [-single_primary=1] -size=1000M
//
// Linear write:
//
@ -30,7 +27,12 @@
#include "rw_blocking.h"
#include "osd_ops.h"
#include "fio_headers.h"
extern "C" {
#define CONFIG_HAVE_GETTID
#define CONFIG_PWRITEV2
#include "fio/fio.h"
#include "fio/optgroup.h"
}
struct sec_data
{
@ -51,7 +53,6 @@ struct sec_options
int port = 0;
int single_primary = 0;
int trace = 0;
int block_order = 17;
};
static struct fio_option options[] = {
@ -73,15 +74,6 @@ static struct fio_option options[] = {
.category = FIO_OPT_C_ENGINE,
.group = FIO_OPT_G_FILENAME,
},
{
.name = "block_size_order",
.lname = "Blockstore block size order",
.type = FIO_OPT_INT,
.off1 = offsetof(struct sec_options, block_order),
.help = "Blockstore block size order (size = 2^order)",
.category = FIO_OPT_C_ENGINE,
.group = FIO_OPT_G_FILENAME,
},
{
.name = "single_primary",
.lname = "Single Primary",
@ -140,7 +132,6 @@ static void sec_cleanup(struct thread_data *td)
if (bsd)
{
close(bsd->connect_fd);
delete bsd;
}
}
@ -149,8 +140,6 @@ static int sec_init(struct thread_data *td)
{
sec_options *o = (sec_options*)td->eo;
sec_data *bsd = (sec_data*)td->io_ops_data;
bsd->block_order = o->block_order == 0 ? 17 : o->block_order;
bsd->block_size = 1 << o->block_order;
struct sockaddr_in addr;
int r;
@ -204,7 +193,7 @@ static enum fio_q_status sec_queue(struct thread_data *td, struct io_u *io)
case DDIR_READ:
if (!opt->single_primary)
{
op.hdr.opcode = OSD_OP_SEC_READ;
op.hdr.opcode = OSD_OP_SECONDARY_READ;
op.sec_rw.oid = {
.inode = 1,
.stripe = io->offset >> bsd->block_order,
@ -225,7 +214,7 @@ static enum fio_q_status sec_queue(struct thread_data *td, struct io_u *io)
case DDIR_WRITE:
if (!opt->single_primary)
{
op.hdr.opcode = OSD_OP_SEC_WRITE;
op.hdr.opcode = OSD_OP_SECONDARY_WRITE;
op.sec_rw.oid = {
.inode = 1,
.stripe = io->offset >> bsd->block_order,
@ -313,7 +302,6 @@ static int sec_getevents(struct thread_data *td, unsigned int min, unsigned int
exit(1);
}
io_u* io = it->second;
bsd->queue.erase(it);
if (io->ddir == DDIR_READ)
{
if (reply.hdr.retval != io->xfer_buflen)
@ -381,7 +369,7 @@ static int sec_invalidate(struct thread_data *td, struct fio_file *f)
}
struct ioengine_ops ioengine = {
.name = "vitastor_secondary_osd",
.name = "microceph_secondary_osd",
.version = FIO_IOOPS_VERSION,
.flags = FIO_MEMALIGN | FIO_DISKLESSIO | FIO_NOEXTEND,
.setup = sec_setup,

View File

@ -1,6 +1,3 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 or GNU GPL-2.0+ (see README.md for details)
#include <netinet/tcp.h>
#include <sys/epoll.h>
@ -13,8 +10,6 @@
#include <fcntl.h>
#include <string.h>
#include <stdexcept>
#include "json11/json11.hpp"
#include "http_client.h"
#include "timerfd_manager.h"
@ -22,6 +17,7 @@
#define READ_BUFFER_SIZE 9000
static int extract_port(std::string & host);
static std::string strtolower(const std::string & in);
static std::string trim(const std::string & in);
static std::string ws_format_frame(int type, uint64_t size);
static bool ws_parse_frame(std::string & buf, int & type, std::string & res);
@ -54,15 +50,8 @@ struct http_co_t
websocket_t ws;
int onstack = 0;
bool ended = false;
~http_co_t();
inline void stackin() { onstack++; }
inline void stackout() { onstack--; if (!onstack && ended) end(); }
inline void end() { ended = true; if (!onstack) { delete this; } }
void start_connection();
void handle_events();
void handle_connect_result();
void submit_read();
void submit_send();
@ -148,7 +137,7 @@ void websocket_t::post_message(int type, const std::string & msg)
void websocket_t::close()
{
co->end();
delete co;
}
http_co_t::~http_co_t()
@ -184,15 +173,14 @@ http_co_t::~http_co_t()
void http_co_t::start_connection()
{
stackin();
int port = extract_port(host);
struct sockaddr_in addr;
int r;
if ((r = inet_pton(AF_INET, host.c_str(), &addr.sin_addr)) != 1)
{
parsed.error_code = ENXIO;
stackout();
end();
// FIXME 'delete this' is ugly...
delete this;
return;
}
addr.sin_family = AF_INET;
@ -201,8 +189,7 @@ void http_co_t::start_connection()
if (peer_fd < 0)
{
parsed.error_code = errno;
stackout();
end();
delete this;
return;
}
fcntl(peer_fd, F_SETFL, fcntl(peer_fd, F_GETFL, 0) | O_NONBLOCK);
@ -214,57 +201,30 @@ void http_co_t::start_connection()
{
parsed.error_code = ETIME;
}
end();
delete this;
});
}
tfd->set_fd_handler(peer_fd, true, [this](int peer_fd, int epoll_events)
{
this->epoll_events |= epoll_events;
handle_connect_result();
});
epoll_events = 0;
// Finally call connect
r = ::connect(peer_fd, (sockaddr*)&addr, sizeof(addr));
if (r < 0 && errno != EINPROGRESS)
{
parsed.error_code = errno;
stackout();
end();
delete this;
return;
}
tfd->set_fd_handler(peer_fd, true, [this](int peer_fd, int epoll_events)
{
this->epoll_events |= epoll_events;
handle_events();
});
state = HTTP_CO_CONNECTING;
stackout();
}
void http_co_t::handle_events()
{
stackin();
while (epoll_events)
{
if (state == HTTP_CO_CONNECTING)
{
handle_connect_result();
}
else
{
epoll_events &= ~EPOLLOUT;
if (epoll_events & EPOLLIN)
{
submit_read();
}
else if (epoll_events & (EPOLLRDHUP|EPOLLERR))
{
end();
break;
}
}
}
stackout();
}
void http_co_t::handle_connect_result()
{
stackin();
if (epoll_events & (EPOLLOUT | EPOLLERR))
{
int result = 0;
socklen_t result_len = sizeof(result);
if (getsockopt(peer_fd, SOL_SOCKET, SO_ERROR, &result, &result_len) < 0)
@ -274,8 +234,7 @@ void http_co_t::handle_connect_result()
if (result != 0)
{
parsed.error_code = result;
stackout();
end();
delete this;
return;
}
int one = 1;
@ -283,17 +242,28 @@ void http_co_t::handle_connect_result()
tfd->set_fd_handler(peer_fd, false, [this](int peer_fd, int epoll_events)
{
this->epoll_events |= epoll_events;
handle_events();
if (this->epoll_events & EPOLLIN)
{
submit_read();
}
else if (this->epoll_events & (EPOLLRDHUP|EPOLLERR))
{
delete this;
}
});
state = HTTP_CO_SENDING_REQUEST;
submit_send();
stackout();
}
else
{
delete this;
}
}
void http_co_t::submit_read()
{
stackin();
int res;
again:
if (rbuf.size() != READ_BUFFER_SIZE)
{
rbuf.resize(READ_BUFFER_SIZE);
@ -301,6 +271,7 @@ void http_co_t::submit_read()
read_iov = { .iov_base = rbuf.data(), .iov_len = READ_BUFFER_SIZE };
read_msg.msg_iov = &read_iov;
read_msg.msg_iovlen = 1;
epoll_events = epoll_events & ~EPOLLIN;
res = recvmsg(peer_fd, &read_msg, 0);
if (res < 0)
{
@ -308,26 +279,31 @@ void http_co_t::submit_read()
}
if (res == -EAGAIN)
{
epoll_events = epoll_events & ~EPOLLIN;
res = 0;
}
else if (res <= 0)
if (res < 0)
{
// < 0 means error, 0 means EOF
if (!res)
epoll_events = epoll_events & ~EPOLLIN;
end();
delete this;
return;
}
else
{
response += std::string(rbuf.data(), res);
handle_read();
if (res == READ_BUFFER_SIZE)
{
goto again;
}
if (!handle_read())
{
return;
}
if (res < READ_BUFFER_SIZE && (epoll_events & (EPOLLRDHUP|EPOLLERR)))
{
delete this;
return;
}
stackout();
}
void http_co_t::submit_send()
{
stackin();
int res;
again:
if (sent < request.size())
@ -335,7 +311,7 @@ again:
send_iov = (iovec){ .iov_base = (void*)(request.c_str()+sent), .iov_len = request.size()-sent };
send_msg.msg_iov = &send_iov;
send_msg.msg_iovlen = 1;
res = sendmsg(peer_fd, &send_msg, MSG_NOSIGNAL);
res = sendmsg(peer_fd, &send_msg, 0);
if (res < 0)
{
res = -errno;
@ -346,17 +322,14 @@ again:
}
else if (res < 0)
{
stackout();
end();
delete this;
return;
}
sent += res;
if (state == HTTP_CO_SENDING_REQUEST)
{
if (sent >= request.size())
{
state = HTTP_CO_REQUEST_SENT;
}
else
goto again;
}
@ -367,12 +340,10 @@ again:
goto again;
}
}
stackout();
}
bool http_co_t::handle_read()
{
stackin();
if (state == HTTP_CO_REQUEST_SENT)
{
int pos = response.find("\r\n\r\n");
@ -407,8 +378,7 @@ bool http_co_t::handle_read()
if (!target_response_size)
{
// Sorry, unsupported response
stackout();
end();
delete this;
return false;
}
}
@ -416,8 +386,7 @@ bool http_co_t::handle_read()
}
if (state == HTTP_CO_HEADERS_RECEIVED && target_response_size > 0 && response.size() >= target_response_size)
{
stackout();
end();
delete this;
return false;
}
if (state == HTTP_CO_CHUNKED && response.size() > 0)
@ -445,8 +414,7 @@ bool http_co_t::handle_read()
}
if (parsed.eof)
{
stackout();
end();
delete this;
return false;
}
if (want_streaming && parsed.body.size() > 0)
@ -463,13 +431,11 @@ bool http_co_t::handle_read()
parsed.body = "";
}
}
stackout();
return true;
}
void http_co_t::post_message(int type, const std::string & msg)
{
stackin();
if (state == HTTP_CO_WEBSOCKET)
{
request += ws_format_frame(type, msg.size());
@ -481,7 +447,6 @@ void http_co_t::post_message(int type, const std::string & msg)
ws_outbox += ws_format_frame(type, msg.size());
ws_outbox += msg;
}
stackout();
}
uint64_t stoull_full(const std::string & str, int base)
@ -672,7 +637,7 @@ static int extract_port(std::string & host)
return port;
}
std::string strtolower(const std::string & in)
static std::string strtolower(const std::string & in)
{
std::string s = in;
for (int i = 0; i < s.length(); i++)

View File

@ -1,6 +1,3 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 or GNU GPL-2.0+ (see README.md for details)
#pragma once
#include <string>
#include <vector>
@ -49,8 +46,6 @@ std::vector<std::string> getifaddr_list(bool include_v6 = false);
uint64_t stoull_full(const std::string & str, int base = 10);
std::string strtolower(const std::string & in);
void http_request(timerfd_manager_t *tfd, const std::string & host, const std::string & request,
const http_options_t & options, std::function<void(const http_response_t *response)> callback);

1
json11

@ -1 +0,0 @@
Subproject commit 97f06cb20c1e136fd37d58fb40f57dd8f8a3a4a7

48
lambda_size.cpp Normal file
View File

@ -0,0 +1,48 @@
#include <iostream>
#include <functional>
#include <array>
#include <cstdlib> // for malloc() and free()
using namespace std;
// replace operator new and delete to log allocations
void* operator new(std::size_t n)
{
cout << "Allocating " << n << " bytes" << endl;
return malloc(n);
}
void operator delete(void* p) throw()
{
free(p);
}
class test
{
public:
std::string s;
void a(std::function<void()> & f, const char *str)
{
auto l = [this, str]() { cout << str << " ? " << s << " from this\n"; };
cout << "Assigning lambda3 of size " << sizeof(l) << endl;
f = l;
}
};
int main()
{
std::array<char, 16> arr1;
auto lambda1 = [arr1](){};
cout << "Assigning lambda1 of size " << sizeof(lambda1) << endl;
std::function<void()> f1 = lambda1;
std::array<char, 17> arr2;
auto lambda2 = [arr2](){};
cout << "Assigning lambda2 of size " << sizeof(lambda2) << endl;
std::function<void()> f2 = lambda2;
test t;
std::function<void()> f3;
t.s = "str";
t.a(f3, "huyambda");
f3();
}

View File

@ -1,6 +1,3 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
// Data distribution optimizer using linear programming (lp_solve)
const child_process = require('child_process');
@ -28,7 +25,7 @@ async function lp_solve(text)
let vars = {};
for (const line of stdout.split(/\n/))
{
let m = /^(^Value of objective function: (-?[\d\.]+)|Actual values of the variables:)\s*$/.exec(line);
let m = /^(^Value of objective function: ([\d\.]+)|Actual values of the variables:)\s*$/.exec(line);
if (m)
{
if (m[2])
@ -50,34 +47,34 @@ 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, max_combinations)
{
if (!pg_count || !osd_tree)
{
return null;
}
max_combinations = max_combinations || 10000;
const all_weights = Object.assign({}, ...Object.values(osd_tree));
const total_weight = Object.values(all_weights).reduce((a, c) => Number(a) + Number(c), 0);
const all_pgs = Object.values(random_combinations(osd_tree, pg_size, max_combinations, parity_space > 1));
let all_pgs = all_combinations(osd_tree, null, true);
if (all_pgs.length > max_combinations)
{
const prob = max_combinations/all_pgs.length;
all_pgs = all_pgs.filter(pg => Math.random() < prob);
}
const pg_per_osd = {};
for (const pg of all_pgs)
{
for (let i = 0; i < pg.length; i++)
for (const osd of pg)
{
const osd = pg[i];
pg_per_osd[osd] = pg_per_osd[osd] || [];
pg_per_osd[osd].push((i >= pg_minsize ? parity_space+'*' : '')+"pg_"+pg.join("_"));
pg_per_osd[osd].push("pg_"+pg.join("_"));
}
}
const pg_effsize = Math.min(pg_minsize, Object.keys(osd_tree).length)
+ Math.max(0, Math.min(pg_size, Object.keys(osd_tree).length) - pg_minsize) * parity_space;
const pg_size = Math.min(Object.keys(osd_tree).length, 3);
let lp = '';
lp += "max: "+all_pgs.map(pg => 'pg_'+pg.join('_')).join(' + ')+";\n";
for (const osd in pg_per_osd)
{
if (osd !== NO_OSD)
{
let osd_pg_count = all_weights[osd]/total_weight*pg_effsize*pg_count;
let osd_pg_count = all_weights[osd]/total_weight*pg_size*pg_count;
lp += pg_per_osd[osd].join(' + ')+' <= '+osd_pg_count+';\n';
}
}
@ -89,30 +86,11 @@ async function optimize_initial({ osd_tree, pg_count, pg_size = 3, pg_minsize =
const lp_result = await lp_solve(lp);
if (!lp_result)
{
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 eff = pg_list_space_efficiency(int_pgs, all_weights, pg_minsize, parity_space);
const res = {
score: lp_result.score,
weights: lp_result.vars,
int_pgs,
space: eff * pg_effsize,
total_space: total_weight,
};
return res;
}
function shuffle(array)
{
for (let i = array.length - 1, j, x; i > 0; i--)
{
j = Math.floor(Math.random() * (i + 1));
x = array[i];
array[i] = array[j];
array[j] = x;
}
const eff = pg_list_space_efficiency(int_pgs, all_weights);
return { score: lp_result.score, weights: lp_result.vars, int_pgs, space: eff*pg_size, total_space: total_weight };
}
function make_int_pgs(weights, pg_count)
@ -131,122 +109,14 @@ function make_int_pgs(weights, pg_count)
weight_left -= weights[pg_name];
pg_left -= n;
}
shuffle(int_pgs);
return int_pgs;
}
function calc_intersect_weights(pg_size, pg_count, prev_weights, all_pgs)
{
const move_weights = {};
if ((1 << pg_size) < pg_count)
{
const intersect = {};
for (const pg_name in prev_weights)
{
const pg = pg_name.substr(3).split(/_/);
for (let omit = 1; omit < (1 << pg_size); omit++)
{
let pg_omit = [ ...pg ];
let intersect_count = pg_size;
for (let i = 0; i < pg_size; i++)
{
if (omit & (1 << i))
{
pg_omit[i] = '';
intersect_count--;
}
}
pg_omit = pg_omit.join(':');
intersect[pg_omit] = Math.max(intersect[pg_omit] || 0, intersect_count);
}
}
for (const pg of all_pgs)
{
let max_int = 0;
for (let omit = 1; omit < (1 << pg_size); omit++)
{
let pg_omit = [ ...pg ];
for (let i = 0; i < pg_size; i++)
{
if (omit & (1 << i))
{
pg_omit[i] = '';
}
}
pg_omit = pg_omit.join(':');
max_int = Math.max(max_int, intersect[pg_omit] || 0);
}
move_weights['pg_'+pg.join('_')] = pg_size-max_int;
}
}
else
{
const prev_pg_hashed = Object.keys(prev_weights).map(pg_name => pg_name.substr(3).split(/_/).reduce((a, c) => { a[c] = 1; return a; }, {}));
for (const pg of all_pgs)
{
if (!prev_weights['pg_'+pg.join('_')])
{
let max_int = 0;
for (const prev_hash in prev_pg_hashed)
{
const intersect_count = pg.reduce((a, osd) => a + (prev_hash[osd] ? 1 : 0), 0);
if (max_int < intersect_count)
{
max_int = intersect_count;
if (max_int >= pg_size)
{
break;
}
}
}
move_weights['pg_'+pg.join('_')] = pg_size-max_int;
}
}
}
return move_weights;
}
function add_valid_previous(osd_tree, prev_weights, all_pgs)
{
// Add previous combinations that are still valid
const hosts = Object.keys(osd_tree).sort();
const host_per_osd = {};
for (const host in osd_tree)
{
for (const osd in osd_tree[host])
{
host_per_osd[osd] = host;
}
}
skip_pg: for (const pg_name in prev_weights)
{
const seen_hosts = {};
const pg = pg_name.substr(3).split(/_/);
for (const osd of pg)
{
if (!host_per_osd[osd] || seen_hosts[host_per_osd[osd]])
{
continue skip_pg;
}
seen_hosts[host_per_osd[osd]] = true;
}
if (!all_pgs[pg_name])
{
all_pgs[pg_name] = pg;
}
}
}
// Try to minimize data movement
async function optimize_change({ prev_pgs: prev_int_pgs, osd_tree, pg_size = 3, pg_minsize = 2, max_combinations = 10000, parity_space = 1 })
async function optimize_change(prev_int_pgs, osd_tree, max_combinations)
{
if (!osd_tree)
{
return null;
}
// FIXME: use parity_chunks with parity_space instead of pg_minsize
const pg_effsize = Math.min(pg_minsize, Object.keys(osd_tree).length)
+ Math.max(0, Math.min(pg_size, Object.keys(osd_tree).length) - pg_minsize) * parity_space;
max_combinations = max_combinations || 10000;
const pg_size = Math.min(Object.keys(osd_tree).length, 3);
const pg_count = prev_int_pgs.length;
const prev_weights = {};
const prev_pg_per_osd = {};
@ -254,55 +124,70 @@ async function optimize_change({ prev_pgs: prev_int_pgs, osd_tree, pg_size = 3,
{
const pg_name = 'pg_'+pg.join('_');
prev_weights[pg_name] = (prev_weights[pg_name]||0) + 1;
for (let i = 0; i < pg.length; i++)
for (const osd of pg)
{
const osd = pg[i];
prev_pg_per_osd[osd] = prev_pg_per_osd[osd] || [];
prev_pg_per_osd[osd].push([ pg_name, (i >= pg_minsize ? parity_space : 1) ]);
prev_pg_per_osd[osd].push(pg_name);
}
}
// Get all combinations
let all_pgs = random_combinations(osd_tree, pg_size, max_combinations, parity_space > 1);
add_valid_previous(osd_tree, prev_weights, all_pgs);
all_pgs = Object.values(all_pgs);
let all_pgs = all_combinations(osd_tree, null, true);
if (all_pgs.length > max_combinations)
{
const intersecting = all_pgs.filter(pg => prev_weights['pg_'+pg.join('_')]);
if (intersecting.length > max_combinations)
{
const prob = max_combinations/intersecting.length;
all_pgs = intersecting.filter(pg => Math.random() < prob);
}
else
{
const prob = (max_combinations-intersecting.length)/all_pgs.length;
all_pgs = all_pgs.filter(pg => Math.random() < prob || prev_weights['pg_'+pg.join('_')]);
}
}
const pg_per_osd = {};
for (const pg of all_pgs)
{
const pg_name = 'pg_'+pg.join('_');
for (let i = 0; i < pg.length; i++)
for (const osd of pg)
{
const osd = pg[i];
pg_per_osd[osd] = pg_per_osd[osd] || [];
pg_per_osd[osd].push([ pg_name, (i >= pg_minsize ? parity_space : 1) ]);
pg_per_osd[osd].push(pg_name);
}
}
// Penalize PGs based on their similarity to old PGs
const move_weights = calc_intersect_weights(pg_size, pg_count, prev_weights, all_pgs);
const intersect = {};
for (const pg_name in prev_weights)
{
const pg = pg_name.substr(3).split(/_/);
intersect[pg[0]+'::'] = intersect[':'+pg[1]+':'] = intersect['::'+pg[2]] = 2;
intersect[pg[0]+'::'+pg[2]] = intersect[':'+pg[1]+':'+pg[2]] = intersect[pg[0]+':'+pg[1]+':'] = 1;
}
const move_weights = {};
for (const pg of all_pgs)
{
move_weights['pg_'+pg.join('_')] =
intersect[pg[0]+'::'+pg[2]] || intersect[':'+pg[1]+':'+pg[2]] || intersect[pg[0]+':'+pg[1]+':'] ||
intersect[pg[0]+'::'] || intersect[':'+pg[1]+':'] || intersect['::'+pg[2]] ||
3;
}
// Calculate total weight - old PG weights
const all_pg_names = all_pgs.map(pg => 'pg_'+pg.join('_'));
const all_pgs_hash = all_pg_names.reduce((a, c) => { a[c] = true; return a; }, {});
const all_weights = Object.assign({}, ...Object.values(osd_tree));
const total_weight = Object.values(all_weights).reduce((a, c) => Number(a) + Number(c), 0);
// Generate the LP problem
let lp = '';
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}`
prev_weights[pg_name] ? `${4-move_weights[pg_name]}*add_${pg_name} - 4*del_${pg_name}` : `${4-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)
{
const osd_sum = (pg_per_osd[osd]||[]).map(([ pg_name, space ]) => (
prev_weights[pg_name] ? `${space} * add_${pg_name} - ${space} * del_${pg_name}` : `${space} * ${pg_name}`
)).join(' + ');
const rm_osd_pg_count = (prev_pg_per_osd[osd]||[])
.reduce((a, [ old_pg_name, space ]) => (a + (all_pgs_hash[old_pg_name] ? space : 0)), 0);
const osd_pg_count = all_weights[osd]*pg_effsize/total_weight*pg_count - rm_osd_pg_count;
const osd_sum = (pg_per_osd[osd]||[]).map(pg_name => prev_weights[pg_name] ? `add_${pg_name} - del_${pg_name}` : pg_name).join(' + ');
const rm_osd_pg_count = (prev_pg_per_osd[osd]||[]).filter(old_pg_name => move_weights[old_pg_name]).length;
let osd_pg_count = all_weights[osd]*3/total_weight*pg_count - rm_osd_pg_count;
lp += osd_sum + ' <= ' + osd_pg_count + ';\n';
}
}
@ -336,7 +221,7 @@ async function optimize_change({ prev_pgs: prev_int_pgs, osd_tree, pg_size = 3,
const weights = { ...prev_weights };
for (const k in prev_weights)
{
if (!all_pgs_hash[k])
if (!move_weights[k])
{
delete weights[k];
}
@ -351,7 +236,7 @@ async function optimize_change({ prev_pgs: prev_int_pgs, osd_tree, pg_size = 3,
{
weights[k.substr(4)] = (weights[k.substr(4)] || 0) - Number(lp_result.vars[k]);
}
else if (k.substr(0, 3) === 'pg_')
else
{
weights[k] = Number(lp_result.vars[k]);
}
@ -373,7 +258,7 @@ async function optimize_change({ prev_pgs: prev_int_pgs, osd_tree, pg_size = 3,
{
differs++;
}
for (let j = 0; j < pg_size; j++)
for (let j = 0; j < 3; j++)
{
if (new_pgs[i][j] != prev_int_pgs[i][j])
{
@ -388,7 +273,7 @@ async function optimize_change({ prev_pgs: prev_int_pgs, osd_tree, pg_size = 3,
int_pgs: new_pgs,
differs,
osd_differs,
space: pg_effsize * pg_list_space_efficiency(new_pgs, all_weights, pg_minsize, parity_space),
space: pg_size * pg_list_space_efficiency(new_pgs, all_weights),
total_space: total_weight,
};
}
@ -506,112 +391,27 @@ function extract_osds(osd_tree, levels, osd_level, osds = {})
return osds;
}
// ordered = don't treat (x,y) and (y,x) as equal
function random_combinations(osd_tree, pg_size, count, ordered)
{
let seed = 0x5f020e43;
let rng = () =>
{
seed ^= seed << 13;
seed ^= seed >> 17;
seed ^= seed << 5;
return seed + 2147483648;
};
const hosts = Object.keys(osd_tree).sort();
const osds = Object.keys(osd_tree).reduce((a, c) => { a[c] = Object.keys(osd_tree[c]).sort(); return a; }, {});
const r = {};
// Generate random combinations including each OSD at least once
for (let h = 0; h < hosts.length; h++)
{
for (let o = 0; o < osds[hosts[h]].length; o++)
{
const pg = [ osds[hosts[h]][o] ];
const cur_hosts = [ ...hosts ];
cur_hosts.splice(h, 1);
for (let i = 1; i < pg_size && i < hosts.length; i++)
{
const next_host = rng() % cur_hosts.length;
const next_osd = rng() % osds[cur_hosts[next_host]].length;
pg.push(osds[cur_hosts[next_host]][next_osd]);
cur_hosts.splice(next_host, 1);
}
const cyclic_pgs = [ pg ];
if (ordered)
{
for (let i = 1; i < pg.size; i++)
{
cyclic_pgs.push([ ...pg.slice(i), ...pg.slice(0, i) ]);
}
}
for (const pg of cyclic_pgs)
{
while (pg.length < pg_size)
{
pg.push(NO_OSD);
}
r['pg_'+pg.join('_')] = pg;
}
}
}
// Generate purely random combinations
while (count > 0)
{
let host_idx = [];
const cur_hosts = [ ...hosts.map((h, i) => i) ];
const max_hosts = pg_size < hosts.length ? pg_size : hosts.length;
if (ordered)
{
for (let i = 0; i < max_hosts; i++)
{
const r = rng() % cur_hosts.length;
host_idx[i] = cur_hosts[r];
cur_hosts.splice(r, 1);
}
}
else
{
for (let i = 0; i < max_hosts; i++)
{
const r = rng() % (cur_hosts.length - (max_hosts - i - 1));
host_idx[i] = cur_hosts[r];
cur_hosts.splice(0, r+1);
}
}
let pg = host_idx.map(h => osds[hosts[h]][rng() % osds[hosts[h]].length]);
while (pg.length < pg_size)
{
pg.push(NO_OSD);
}
r['pg_'+pg.join('_')] = pg;
count--;
}
return r;
}
// Super-stupid algorithm. Given the current OSD tree, generate all possible OSD combinations
// FIXME: support different pg_sizes, not just 3
// osd_tree = { failure_domain1: { osd1: size1, ... }, ... }
// ordered = return combinations without duplicates having different order
function all_combinations(osd_tree, pg_size, ordered, count)
function all_combinations(osd_tree, count, ordered)
{
const hosts = Object.keys(osd_tree).sort();
const osds = Object.keys(osd_tree).reduce((a, c) => { a[c] = Object.keys(osd_tree[c]).sort(); return a; }, {});
while (hosts.length < pg_size)
while (hosts.length < 3)
{
osds[NO_OSD] = [ NO_OSD ];
hosts.push(NO_OSD);
}
let host_idx = [];
let osd_idx = [];
for (let i = 0; i < pg_size; i++)
{
host_idx.push(i);
osd_idx.push(0);
}
let host_idx = [ 0, 1, 2 ];
let osd_idx = [ 0, 0, 0 ];
const r = [];
while (!count || count < 0 || r.length < count)
{
let inc;
if (host_idx[2] != host_idx[1] && host_idx[2] != host_idx[0] && host_idx[1] != host_idx[0])
{
r.push(host_idx.map((hi, i) => osds[hosts[hi]][osd_idx[i]]));
let inc = pg_size-1;
inc = 2;
while (inc >= 0)
{
osd_idx[inc]++;
@ -625,39 +425,33 @@ function all_combinations(osd_tree, pg_size, ordered, count)
break;
}
}
if (inc < 0)
{
// no osds left in the current host combination, select the next one
inc = pg_size-1;
same_again: while (inc >= 0)
{
host_idx[inc]++;
for (let prev_host = 0; prev_host < inc; prev_host++)
{
if (host_idx[prev_host] == host_idx[inc])
{
continue same_again;
}
}
if (host_idx[inc] < (ordered ? hosts.length-(pg_size-1-inc) : hosts.length))
{
while ((++inc) < pg_size)
{
host_idx[inc] = (ordered ? host_idx[inc-1]+1 : 0);
}
break;
}
else
{
inc--;
}
inc = -1;
}
if (inc < 0)
{
// no osds left in current host combination, select the next one
osd_idx = [ 0, 0, 0 ];
host_idx[2]++;
if (host_idx[2] >= hosts.length)
{
host_idx[1]++;
host_idx[2] = ordered ? host_idx[1]+1 : 0;
if ((ordered ? host_idx[2] : host_idx[1]) >= hosts.length)
{
host_idx[0]++;
host_idx[1] = ordered ? host_idx[0]+1 : 0;
host_idx[2] = ordered ? host_idx[1]+1 : 0;
if ((ordered ? host_idx[2] : host_idx[0]) >= hosts.length)
{
break;
}
}
}
}
}
return r;
}
@ -674,15 +468,14 @@ function pg_weights_space_efficiency(weights, pg_count, osd_sizes)
return pg_per_osd_space_efficiency(per_osd, pg_count, osd_sizes);
}
function pg_list_space_efficiency(pgs, osd_sizes, pg_minsize, parity_space)
function pg_list_space_efficiency(pgs, osd_sizes)
{
const per_osd = {};
for (const pg of pgs)
{
for (let i = 0; i < pg.length; i++)
for (const osd of pg)
{
const osd = pg[i];
per_osd[osd] = (per_osd[osd]||0) + (i >= pg_minsize ? (parity_space||1) : 1);
per_osd[osd] = (per_osd[osd]||0) + 1;
}
}
return pg_per_osd_space_efficiency(per_osd, pgs.length, osd_sizes);
@ -724,6 +517,5 @@ module.exports = {
lp_solve,
make_int_pgs,
align_pgs,
random_combinations,
all_combinations,
};

7
mon/mon-main.js → lp/mon-main.js Executable file → Normal file
View File

@ -1,8 +1,5 @@
#!/usr/bin/node
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
const Mon = require('./mon.js');
const options = {};
@ -18,8 +15,8 @@ for (let i = 2; i < process.argv.length; 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]');
console.error('USAGE: '+process.argv[0]+' '+process.argv[1]+' --etcd_url "http://127.0.0.1:2379,..." --etcd_prefix "/rage" --etcd_start_timeout 5');
process.exit();
}
new Mon(options).start().catch(e => { console.error(e); process.exit(); });
new Mon(options).start();

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const http = require('http');
const os = require('os');
const WebSocket = require('ws');
const LPOptimizer = require('./lp-optimizer.js');
const stableStringify = require('./stable-stringify.js');
class Mon
{
static etcd_tree = {
config: {
global: null,
/* placement_tree = {
levels: { datacenter: 1, rack: 2, host: 3, osd: 4, ... },
nodes: { host1: { level: 'host', parent: 'rack1' }, ... },
failure_domain: 'host',
} */
placement_tree: null,
osd: {},
pgs: {},
},
osd: {
state: {},
stats: {},
},
mon: {
master: null,
},
pg: {
change_stamp: null,
state: {},
stats: {},
history: {},
},
}
constructor(config)
{
// FIXME: Maybe prefer local etcd
this.etcd_urls = [];
for (let url of config.etcd_url.split(/,/))
{
let scheme = 'http';
url = url.trim().replace(/^(https?):\/\//, (m, m1) => { scheme = m1; return ''; });
if (!/\/[^\/]/.exec(url))
url += '/v3';
this.etcd_urls.push(scheme+'://'+url);
}
this.etcd_prefix = config.etcd_prefix || '/rage';
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(Mon.etcd_tree));
}
async start()
{
await this.load_config();
await this.get_lease();
await this.become_master();
await this.load_cluster_state();
await this.start_watcher();
await this.recheck_pgs();
}
async load_config()
{
const res = await this.etcd_call('/txn', { success: [
{ requestRange: { key: b64(this.etcd_prefix+'/config/global') } }
] }, this.etcd_start_timeout, -1);
this.parse_kv(res.responses[0].response_range.kvs[0]);
this.check_config();
}
check_config()
{
this.config.etcd_mon_timeout = Number(this.config.etcd_mon_timeout) || 0;
if (this.config.etcd_mon_timeout <= 0)
{
this.config.etcd_mon_timeout = 1000;
}
this.config.etcd_mon_retries = Number(this.config.etcd_mon_retries) || 5;
if (this.config.etcd_mon_retries < 0)
{
this.config.etcd_mon_retries = 0;
}
this.config.mon_change_timeout = Number(this.config.mon_change_timeout) || 1000;
if (this.config.mon_change_timeout < 100)
{
this.config.mon_change_timeout = 100;
}
this.config.mon_stats_timeout = Number(this.config.mon_stats_timeout) || 1000;
if (this.config.mon_stats_timeout < 100)
{
this.config.mon_stats_timeout = 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)
{
this.config.osd_out_time = 30*60; // 30 minutes by default
}
this.config.max_osd_combinations = Number(this.config.max_osd_combinations) || 10000;
if (this.config.max_osd_combinations < 100)
{
this.config.max_osd_combinations = 100;
}
}
async start_watcher(retries)
{
let retry = 0;
if (retries >= 0 && retries < 1)
{
retries = 1;
}
while (retries < 0 || retry < retries)
{
const base = 'ws'+this.etcd_urls[Math.floor(Math.random()*this.etcd_urls.length)].substr(4);
const ok = await new Promise((ok, no) =>
{
const timer_id = setTimeout(() =>
{
this.ws.close();
ok(false);
}, timeout);
this.ws = new WebSocket(base+'/watch');
this.ws.on('open', () =>
{
if (timer_id)
clearTimeout(timer_id);
ok(true);
});
});
if (!ok)
{
this.ws = null;
}
retry++;
}
if (!this.ws)
{
this.die('Failed to open etcd watch websocket');
}
this.ws.send(JSON.stringify({
create_request: {
key: b64(this.etcd_prefix+'/'),
range_end: b64(this.etcd_prefix+'0'),
start_revision: ''+this.etcd_watch_revision,
watch_id: 1,
},
}));
this.ws.on('message', (msg) =>
{
let data;
try
{
data = JSON.parse(msg);
}
catch (e)
{
}
if (!data || !data.result || !data.result.events)
{
console.error('Garbage received from watch websocket: '+msg);
}
else
{
let stats_changed = false, changed = false;
console.log('Revision '+data.result.header.revision+' events: ');
for (const e of data.result.events)
{
this.parse_kv(e.kv);
const key = e.kv.key.substr(this.etcd_prefix.length);
if (key.substr(0, 11) == '/osd/stats/' || key.substr(0, 10) == '/pg/stats/')
{
stats_changed = true;
}
else if (key != '/stats')
{
changed = true;
}
console.log(e);
}
if (stats_changed)
{
this.schedule_update_stats();
}
if (changed)
{
this.schedule_recheck();
}
}
});
}
async get_lease()
{
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, this.config.etcd_mon_retries);
this.etcd_lease_id = res.ID;
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)
{
this.die('Lease expired');
}
}, config.etcd_mon_timeout);
}
async become_master()
{
const state = { ip: this.local_ips() };
while (1)
{
const res = await this.etcd_call('/txn', {
compare: [ { target: 'CREATE', create_revision: 0, key: b64(this.etcd_prefix+'/mon/master') } ],
success: [ { key: b64(this.etcd_prefix+'/mon/master'), value: b64(JSON.stringify(state)), lease: ''+this.etcd_lease_id } ],
}, this.etcd_start_timeout, 0);
if (!res.succeeded)
{
await new Promise(ok => setTimeout(ok, this.etcd_start_timeout));
}
}
}
async load_cluster_state()
{
const res = await this.etcd_call('/txn', { success: [
{ requestRange: { key: b64(this.etcd_prefix+'/'), range_end: b64(this.etcd_prefix+'0') } },
] }, this.etcd_start_timeout, -1);
this.etcd_watch_revision = BigInt(res.header.revision)+BigInt(1);
const data = JSON.parse(JSON.stringify(Mon.etcd_tree));
for (const response of res.responses)
{
for (const kv of response.response_range.kvs)
{
this.parse_kv(kv);
}
}
this.state = data;
}
all_osds()
{
return Object.keys(this.state.osd.stats);
}
get_osd_tree()
{
this.state.config.placement_tree = this.state.config.placement_tree||{};
const levels = this.state.config.placement_tree.levels||{};
levels.host = levels.host || 100;
levels.osd = levels.osd || 101;
const tree = { '': { children: [] } };
for (const node_id in this.state.config.placement_tree.nodes||{})
{
const node_cfg = this.state.config.placement_tree.nodes[node_id];
if (!node_id || /^\d/.exec(node_id) ||
!node_cfg.level || !levels[node_cfg.level])
{
// All nodes must have non-empty non-numeric IDs and valid levels
continue;
}
tree[node_id] = { id: node_id, level: node_cfg.level, parent: node_cfg.parent, children: [] };
}
// This requires monitor system time to be in sync with OSD system times (at least to some extent)
const down_time = Date.now()/1000 - this.config.osd_out_time;
for (const osd_num of this.all_osds().sort((a, b) => a - b))
{
const stat = this.state.osd.stats[osd_num];
if (stat.size && (this.state.osd.state[osd_num] || Number(stat.time) >= down_time))
{
// Numeric IDs are reserved for OSDs
const reweight = this.state.config.osd[osd_num] && Number(this.state.config.osd[osd_num].reweight) || 1;
tree[osd_num] = tree[osd_num] || { id: osd_num, parent: stat.host };
tree[osd_num].level = 'osd';
tree[osd_num].size = reweight * stat.size / 1024 / 1024 / 1024 / 1024; // terabytes
delete tree[osd_num].children;
}
}
for (const node_id in tree)
{
if (node_id === '')
{
continue;
}
const node_cfg = tree[node_id];
const node_level = levels[node_cfg.level] || node_cfg.level;
let parent_level = node_cfg.parent && tree[node_cfg.parent] && tree[node_cfg.parent].children
&& tree[node_cfg.parent].level;
parent_level = parent_level ? (levels[parent_level] || parent_level) : null;
// Parent's level must be less than child's; OSDs must be leaves
const parent = parent_level && parent_level < node_level ? tree[node_cfg.parent] : '';
tree[parent].children.push(tree[node_id]);
delete node_cfg.parent;
}
return LPOptimizer.flatten_tree(tree[''].children, levels, this.state.config.failure_domain, 'osd');
}
async stop_all_pgs()
{
let has_online = false, paused = true;
for (const pg in this.state.config.pgs.items||{})
{
const cur_state = ((this.state.pg.state[pg]||{}).state||[]).join(',');
if (cur_state != '' && cur_state != 'offline')
{
has_online = true;
}
if (!this.state.config.pgs.items[pg].pause)
{
paused = false;
}
}
if (!paused)
{
console.log('Stopping all PGs before changing PG count');
const new_cfg = JSON.parse(JSON.stringify(this.state.config.pgs));
for (const pg in new_cfg.items)
{
new_cfg.items[pg].pause = true;
}
// Check that no OSDs change their state before we pause PGs
// Doing this we make sure that OSDs don't wake up in the middle of our "transaction"
// and can't see the old PG configuration
const checks = [];
for (const osd_num of this.all_osds())
{
const key = b64(this.etcd_prefix+'/osd/state/'+osd_num);
checks.push({ key, target: 'MOD', result: 'LESS', mod_revision: ''+this.etcd_watch_revision });
}
const res = await this.etcd_call('/txn', {
compare: [
{ key: b64(this.etcd_prefix+'/mon/master'), target: 'LEASE', lease: ''+this.etcd_lease_id },
{ key: b64(this.etcd_prefix+'/config/pgs'), target: 'MOD', mod_revision: ''+this.etcd_watch_revision, result: 'LESS' },
...checks,
],
success: [
{ requestPut: { key: b64(this.etcd_prefix+'/config/pgs'), value: b64(JSON.stringify(new_cfg)) } },
],
}, this.config.etcd_mon_timeout, 0);
if (!res.succeeded)
{
return false;
}
this.state.config.pgs = new_cfg;
}
return !has_online;
}
scale_pg_count(prev_pgs, pg_history, new_pg_count)
{
const old_pg_count = prev_pgs.length;
// Add all possibly intersecting PGs into the history of new PGs
if (!(new_pg_count % old_pg_count))
{
// New PG count is a multiple of the old PG count
const mul = (new_pg_count / old_pg_count);
for (let i = 0; i < new_pg_count; i++)
{
const old_i = Math.floor(new_pg_count / mul);
pg_history[i] = JSON.parse(JSON.stringify(this.state.pg.history[1+old_i]));
}
}
else if (!(old_pg_count % new_pg_count))
{
// Old PG count is a multiple of the new PG count
const mul = (old_pg_count / new_pg_count);
for (let i = 0; i < new_pg_count; i++)
{
pg_history[i] = {
osd_sets: [],
all_peers: [],
};
for (let j = 0; j < mul; j++)
{
pg_history[i].osd_sets.push(prev_pgs[i*mul]);
const hist = this.state.pg.history[1+i*mul+j];
if (hist && hist.osd_sets && hist.osd_sets.length)
{
Array.prototype.push.apply(pg_history[i].osd_sets, hist.osd_sets);
}
if (hist && hist.all_peers && hist.all_peers.length)
{
Array.prototype.push.apply(pg_history[i].all_peers, hist.all_peers);
}
}
}
}
else
{
// Any PG may intersect with any PG after non-multiple PG count change
// So, merge ALL PGs history
let all_sets = {};
let all_peers = {};
for (const pg of prev_pgs)
{
all_sets[pg.join(' ')] = pg;
}
for (const pg in this.state.pg.history)
{
const hist = this.state.pg.history[pg];
if (hist && hist.osd_sets)
{
for (const pg of hist.osd_sets)
{
all_sets[pg.join(' ')] = pg;
}
}
if (hist && hist.all_peers)
{
for (const osd_num of hist.all_peers)
{
all_peers[osd_num] = Number(osd_num);
}
}
}
all_sets = Object.values(all_sets);
all_peers = Object.values(all_peers);
for (let i = 0; i < new_pg_count; i++)
{
pg_history[i] = { osd_sets: all_sets, all_peers };
}
}
// Mark history keys for removed PGs as removed
for (let i = new_pg_count; i < old_pg_count; i++)
{
pg_history[i] = null;
}
if (old_pg_count < new_pg_count)
{
for (let i = new_pg_count-1; i >= 0; i--)
{
prev_pgs[i] = prev_pgs[Math.floor(i/new_pg_count*old_pg_count)];
}
}
else if (old_pg_count > new_pg_count)
{
for (let i = 0; i < new_pg_count; i++)
{
prev_pgs[i] = prev_pgs[Math.round(i/new_pg_count*old_pg_count)];
}
prev_pgs.splice(new_pg_count, old_pg_count-new_pg_count);
}
}
async save_new_pgs(prev_pgs, new_pgs, pg_history, tree_hash)
{
const txn = [], checks = [];
const pg_items = {};
new_pgs.map((osd_set, i) =>
{
osd_set = osd_set.map(osd_num => osd_num === LPOptimizer.NO_OSD ? 0 : osd_num);
const alive_set = osd_set.filter(osd_num => osd_num);
pg_items[i+1] = {
osd_set,
primary: alive_set.length ? alive_set[Math.floor(Math.random()*alive_set.length)] : 0,
};
if (prev_pgs[i] && prev_pgs[i].join(' ') != osd_set.join(' '))
{
pg_history[i] = pg_history[i] || {};
pg_history[i].osd_sets = pg_history[i].osd_sets || [];
pg_history[i].osd_sets.push(prev_pgs[i]);
}
});
for (let i = 0; i < new_pgs.length || i < prev_pgs.length; i++)
{
checks.push({
key: b64(this.etcd_prefix+'/pg/history/'+(i+1)),
target: 'MOD',
mod_revision: ''+this.etcd_watch_revision,
result: 'LESS',
});
if (pg_history[i])
{
txn.push({
requestPut: {
key: b64(this.etcd_prefix+'/pg/history/'+(i+1)),
value: b64(JSON.stringify(pg_history[i])),
},
});
}
else
{
txn.push({
requestDeleteRange: {
key: b64(this.etcd_prefix+'/pg/history/'+(i+1)),
},
});
}
}
this.state.config.pgs = {
hash: tree_hash,
items: pg_items,
};
const res = await this.etcd_call('/txn', {
compare: [
{ key: b64(this.etcd_prefix+'/mon/master'), target: 'LEASE', lease: ''+this.etcd_lease_id },
{ key: b64(this.etcd_prefix+'/config/pgs'), target: 'MOD', mod_revision: ''+this.etcd_watch_revision, result: 'LESS' },
...checks,
],
success: [
{ requestPut: { key: b64(this.etcd_prefix+'/config/pgs'), value: b64(JSON.stringify(this.state.config.pgs)) } },
...txn,
],
}, this.config.etcd_mon_timeout, 0);
return res.succeeded;
}
async recheck_pgs()
{
// Take configuration and state, check it against the stored configuration hash
// Recalculate PGs and save them to etcd if the configuration is changed
const tree_cfg = {
osd_tree: this.get_osd_tree(),
pg_count: this.config.pg_count || Object.keys(this.state.config.pgs.items||{}).length || 128,
max_osd_combinations: this.config.max_osd_combinations,
};
const tree_hash = sha1hex(stableStringify(tree_cfg));
if (this.state.config.pgs.hash != tree_hash)
{
// Something has changed
const prev_pgs = [];
for (const pg in this.state.config.pgs.items||{})
{
prev_pgs[pg-1] = this.state.config.pgs.items[pg].osd_set;
}
const pg_history = [];
const old_pg_count = prev_pgs.length;
let optimize_result;
if (old_pg_count > 0)
{
if (old_pg_count != tree_cfg.pg_count)
{
// PG count changed. Need to bring all PGs down.
if (!await this.stop_all_pgs())
{
this.schedule_recheck();
return;
}
this.scale_pg_count(prev_pgs, pg_history, new_pg_count);
}
optimize_result = await LPOptimizer.optimize_change(prev_pgs, tree_cfg.osd_tree, tree_cfg.max_osd_combinations);
}
else
{
optimize_result = await LPOptimizer.optimize_initial(tree_cfg.osd_tree, tree_cfg.pg_count, tree_cfg.max_osd_combinations);
}
if (!await this.save_new_pgs(prev_pgs, optimize_result.int_pgs, pg_history, tree_hash))
{
console.log('Someone changed PG configuration while we also tried to change it. Retrying in '+this.config.mon_change_timeout+' ms');
this.schedule_recheck();
return;
}
console.log('PG configuration successfully changed');
if (old_pg_count != optimize_result.int_pgs.length)
{
console.log(`PG count changed from: ${old_pg_count} to ${optimize_result.int_pgs.length}`);
}
LPOptimizer.print_change_stats(optimize_result);
}
}
schedule_recheck()
{
if (this.recheck_timer)
{
clearTimeout(this.recheck_timer);
this.recheck_timer = null;
}
this.recheck_timer = setTimeout(() =>
{
this.recheck_timer = null;
this.recheck_pgs().catch(console.error);
}, this.config.mon_change_timeout || 1000);
}
sum_stats()
{
let overflow = false;
this.prev_stats = this.prev_stats || { op_stats: {}, subop_stats: {}, recovery_stats: {} };
const op_stats = {}, subop_stats = {}, recovery_stats = {};
for (const osd in this.state.osd.stats)
{
const st = this.state.osd.stats[osd];
for (const op in st.op_stats||{})
{
op_stats[op] = op_stats[op] || { count: 0n, usec: 0n, bytes: 0n };
op_stats[op].count += BigInt(st.op_stats.count||0);
op_stats[op].usec += BigInt(st.op_stats.usec||0);
op_stats[op].bytes += BigInt(st.op_stats.bytes||0);
}
for (const op in st.subop_stats||{})
{
subop_stats[op] = subop_stats[op] || { count: 0n, usec: 0n };
subop_stats[op].count += BigInt(st.subop_stats.count||0);
subop_stats[op].usec += BigInt(st.subop_stats.usec||0);
}
for (const op in st.recovery_stats||{})
{
recovery_stats[op] = recovery_stats[op] || { count: 0n, bytes: 0n };
recovery_stats[op].count += BigInt(st.recovery_stats.count||0);
recovery_stats[op].bytes += BigInt(st.recovery_stats.bytes||0);
}
}
for (const op in op_stats)
{
if (op_stats[op].count >= 0x10000000000000000n)
{
if (!this.prev_stats.op_stats[op])
{
overflow = true;
}
else
{
op_stats[op].count -= this.prev_stats.op_stats[op].count;
op_stats[op].usec -= this.prev_stats.op_stats[op].usec;
op_stats[op].bytes -= this.prev_stats.op_stats[op].bytes;
}
}
}
for (const op in subop_stats)
{
if (subop_stats[op].count >= 0x10000000000000000n)
{
if (!this.prev_stats.subop_stats[op])
{
overflow = true;
}
else
{
subop_stats[op].count -= this.prev_stats.subop_stats[op].count;
subop_stats[op].usec -= this.prev_stats.subop_stats[op].usec;
}
}
}
for (const op in recovery_stats)
{
if (recovery_stats[op].count >= 0x10000000000000000n)
{
if (!this.prev_stats.recovery_stats[op])
{
overflow = true;
}
else
{
recovery_stats[op].count -= this.prev_stats.recovery_stats[op].count;
recovery_stats[op].bytes -= this.prev_stats.recovery_stats[op].bytes;
}
}
}
const object_counts = { object: 0n, clean: 0n, misplaced: 0n, degraded: 0n, incomplete: 0n };
for (const pg_num in this.state.pg.stats)
{
const st = this.state.pg.stats[pg_num];
for (const k in object_counts)
{
if (st[k+'_count'])
{
object_counts[k] += BigInt(st[k+'_count']);
}
}
}
return (this.prev_stats = { overflow, op_stats, subop_stats, recovery_stats, object_counts });
}
async update_total_stats()
{
const stats = this.sum_stats();
if (!stats.overflow)
{
// Convert to strings, serialize and save
const ser = {};
for (const st of [ 'op_stats', 'subop_stats', 'recovery_stats' ])
{
ser[st] = {};
for (const op in stats[st])
{
ser[st][op] = {};
for (const k in stats[st][op])
{
ser[st][op][k] = ''+stats[st][op][k];
}
}
}
ser.object_counts = {};
for (const k in stats.object_counts)
{
ser.object_counts[k] = ''+stats.object_counts[k];
}
await this.etcd_call('/txn', {
success: [ { requestPut: { key: b64(this.etcd_prefix+'/stats'), value: b64(JSON.stringify(ser)) } } ],
}, this.config.etcd_mon_timeout, 0);
}
}
schedule_update_stats()
{
if (this.stats_timer)
{
clearTimeout(this.stats_timer);
this.stats_timer = null;
}
this.stats_timer = setTimeout(() =>
{
this.stats_timer = null;
this.update_total_stats().catch(console.error);
}, this.config.mon_stats_timeout || 1000);
}
parse_kv(kv)
{
if (!kv || !kv.key)
{
return;
}
kv.key = de64(kv.key);
kv.value = kv.value ? JSON.parse(de64(kv.value)) : null;
const key = kv.key.substr(this.etcd_prefix.length).replace(/^\/+/, '').split('/');
const cur = this.state, orig = Mon.etcd_tree;
for (let i = 0; i < key.length-1; i++)
{
if (!orig[key[i]])
{
console.log('Bad key in etcd: '+kv.key+' = '+kv.value);
return;
}
orig = orig[key[i]];
cur = (cur[key[i]] = cur[key[i]] || {});
}
if (orig[key.length-1])
{
console.log('Bad key in etcd: '+kv.key+' = '+kv.value);
return;
}
cur[key[key.length-1]] = kv.value;
if (key.join('/') === 'config/global')
{
this.state.config.global = this.state.config.global || {};
this.config = this.state.config.global;
this.check_config();
}
}
async etcd_call(path, body, timeout, retries)
{
let retry = 0;
if (retries >= 0 && retries < 1)
{
retries = 1;
}
while (retries < 0 || retry < retries)
{
const base = this.etcd_urls[Math.floor(Math.random()*this.etcd_urls.length)];
const res = await POST(base+path, body, timeout);
if (res.json)
{
if (res.json.error)
{
console.log('etcd returned error: '+res.json.error);
break;
}
return res.json;
}
retry++;
}
this.die();
}
die(err)
{
// In fact we can just try to rejoin
console.fatal(err || 'Cluster connection failed');
process.exit(1);
}
local_ips()
{
const ips = [];
const ifaces = os.networkInterfaces();
for (const ifname in ifaces)
{
for (const iface of ifaces[ifname])
{
if (iface.family == 'IPv4' && !iface.internal)
{
ips.push(iface.address);
}
}
}
return ips;
}
}
function POST(url, body, timeout)
{
return new Promise((ok, no) =>
{
const body_text = Buffer.from(JSON.stringify(body));
let timer_id = timeout > 0 ? setTimeout(() =>
{
if (req)
req.abort();
req = null;
ok({ error: 'timeout' });
}, timeout) : null;
let req = http.request(url, { method: 'POST', headers: {
'Content-Type': 'application/json',
'Content-Length': body_text,
} }, (res) =>
{
if (!req)
{
return;
}
clearTimeout(timer_id);
if (res.statusCode != 200)
{
ok({ error: res.statusCode, response: res });
return;
}
let res_body = '';
res.setEncoding('utf8');
res.on('data', chunk => { res_body += chunk });
res.on('end', () =>
{
try
{
res_body = JSON.parse(res_body);
ok({ response: res, json: res_body });
}
catch (e)
{
ok({ error: e, response: res, body: res_body });
}
});
});
req.write(body_text);
req.end();
});
}
function b64(str)
{
return Buffer.from(str).toString('base64');
}
function de64(str)
{
return Buffer.from(str, 'base64').toString();
}
function sha1hex(str)
{
const hash = crypto.createHash('sha1');
hash.update(str);
return hash.digest('hex');
}

View File

@ -1,15 +1,14 @@
{
"name": "vitastor-mon",
"name": "rage-mon",
"version": "1.0.0",
"description": "Vitastor SDS monitor service",
"main": "mon-main.js",
"description": "RAGE storage monitor service",
"main": "mon.js",
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1"
},
"author": "Vitaliy Filippov",
"license": "UNLICENSED",
"dependencies": {
"sprintf-js": "^1.1.2",
"ws": "^7.2.5"
}
}

View File

@ -1,6 +1,3 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
const LPOptimizer = require('./lp-optimizer.js');
const crush_tree = [
@ -43,31 +40,31 @@ async function run()
{
const cur_tree = {};
console.log('Empty tree:');
let res = await LPOptimizer.optimize_initial({ osd_tree: cur_tree, pg_size: 3, pg_count: 256 });
let res = await LPOptimizer.optimize_initial(cur_tree, 256);
LPOptimizer.print_change_stats(res, false);
console.log('\nAdding 1st failure domain:');
cur_tree['dom1'] = osd_tree['dom1'];
res = await LPOptimizer.optimize_change({ prev_pgs: res.int_pgs, osd_tree: cur_tree, pg_size: 3 });
res = await LPOptimizer.optimize_change(res.int_pgs, cur_tree);
LPOptimizer.print_change_stats(res, false);
console.log('\nAdding 2nd failure domain:');
cur_tree['dom2'] = osd_tree['dom2'];
res = await LPOptimizer.optimize_change({ prev_pgs: res.int_pgs, osd_tree: cur_tree, pg_size: 3 });
res = await LPOptimizer.optimize_change(res.int_pgs, cur_tree);
LPOptimizer.print_change_stats(res, false);
console.log('\nAdding 3rd failure domain:');
cur_tree['dom3'] = osd_tree['dom3'];
res = await LPOptimizer.optimize_change({ prev_pgs: res.int_pgs, osd_tree: cur_tree, pg_size: 3 });
res = await LPOptimizer.optimize_change(res.int_pgs, cur_tree);
LPOptimizer.print_change_stats(res, false);
console.log('\nRemoving 3rd failure domain:');
delete cur_tree['dom3'];
res = await LPOptimizer.optimize_change({ prev_pgs: res.int_pgs, osd_tree: cur_tree, pg_size: 3 });
res = await LPOptimizer.optimize_change(res.int_pgs, cur_tree);
LPOptimizer.print_change_stats(res, false);
console.log('\nRemoving 2nd failure domain:');
delete cur_tree['dom2'];
res = await LPOptimizer.optimize_change({ prev_pgs: res.int_pgs, osd_tree: cur_tree, pg_size: 3 });
res = await LPOptimizer.optimize_change(res.int_pgs, cur_tree);
LPOptimizer.print_change_stats(res, false);
console.log('\nRemoving 1st failure domain:');
delete cur_tree['dom1'];
res = await LPOptimizer.optimize_change({ prev_pgs: res.int_pgs, osd_tree: cur_tree, pg_size: 3 });
res = await LPOptimizer.optimize_change(res.int_pgs, cur_tree);
LPOptimizer.print_change_stats(res, false);
}

View File

@ -1,6 +1,3 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
const LPOptimizer = require('./lp-optimizer.js');
const osd_tree = {
@ -78,37 +75,19 @@ const crush_tree = [
async function run()
{
let res;
// Test: add 1 OSD of almost the same size. Ideal data movement could be 1/12 = 8.33%. Actual is ~13%
// Space efficiency is ~99% in all cases.
console.log('256 PGs, size=2');
res = await LPOptimizer.optimize_initial({ osd_tree, pg_size: 2, pg_count: 256 });
// Space efficiency is ~99.5% in both cases.
let res = await LPOptimizer.optimize_initial(osd_tree, 256);
LPOptimizer.print_change_stats(res, false);
console.log('\nAdding osd.8');
console.log('adding osd.8');
osd_tree[500][8] = 3.58589;
res = await LPOptimizer.optimize_change({ prev_pgs: res.int_pgs, osd_tree, pg_size: 2 });
res = await LPOptimizer.optimize_change(res.int_pgs, osd_tree);
LPOptimizer.print_change_stats(res, false);
console.log('\nRemoving osd.8');
console.log('removing osd.8');
delete osd_tree[500][8];
res = await LPOptimizer.optimize_change({ prev_pgs: res.int_pgs, osd_tree, pg_size: 2 });
res = await LPOptimizer.optimize_change(res.int_pgs, osd_tree);
LPOptimizer.print_change_stats(res, false);
console.log('\n256 PGs, size=3');
res = await LPOptimizer.optimize_initial({ osd_tree, pg_size: 3, pg_count: 256 });
LPOptimizer.print_change_stats(res, false);
console.log('\nAdding osd.8');
osd_tree[500][8] = 3.58589;
res = await LPOptimizer.optimize_change({ prev_pgs: res.int_pgs, osd_tree, pg_size: 3 });
LPOptimizer.print_change_stats(res, false);
console.log('\nRemoving osd.8');
delete osd_tree[500][8];
res = await LPOptimizer.optimize_change({ prev_pgs: res.int_pgs, osd_tree, pg_size: 3 });
LPOptimizer.print_change_stats(res, false);
console.log('\n256 PGs, size=3, failure domain=rack');
res = await LPOptimizer.optimize_initial({ osd_tree: LPOptimizer.flatten_tree(crush_tree, {}, 1, 3), pg_size: 3, pg_count: 256 });
res = await LPOptimizer.optimize_initial(LPOptimizer.flatten_tree(crush_tree, {}, 1, 3), 256);
LPOptimizer.print_change_stats(res, false);
}

View File

@ -1,104 +0,0 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
module.exports = {
scale_pg_count,
};
function add_pg_history(new_pg_history, new_pg, prev_pgs, prev_pg_history, old_pg)
{
if (!new_pg_history[new_pg])
{
new_pg_history[new_pg] = {
osd_sets: {},
all_peers: {},
epoch: 0,
};
}
const nh = new_pg_history[new_pg], oh = prev_pg_history[old_pg];
nh.osd_sets[prev_pgs[old_pg].join(' ')] = prev_pgs[old_pg];
if (oh && oh.osd_sets && oh.osd_sets.length)
{
for (const pg of oh.osd_sets)
{
nh.osd_sets[pg.join(' ')] = pg;
}
}
if (oh && oh.all_peers && oh.all_peers.length)
{
for (const osd_num of oh.all_peers)
{
nh.all_peers[osd_num] = Number(osd_num);
}
}
if (oh && oh.epoch)
{
nh.epoch = nh.epoch < oh.epoch ? oh.epoch : nh.epoch;
}
}
function finish_pg_history(merged_history)
{
merged_history.osd_sets = Object.values(merged_history.osd_sets);
merged_history.all_peers = Object.values(merged_history.all_peers);
}
function scale_pg_count(prev_pgs, prev_pg_history, new_pg_history, new_pg_count)
{
const old_pg_count = prev_pgs.length;
// Add all possibly intersecting PGs to the history of new PGs
if (!(new_pg_count % old_pg_count))
{
// New PG count is a multiple of old PG count
for (let i = 0; i < new_pg_count; i++)
{
add_pg_history(new_pg_history, i, prev_pgs, prev_pg_history, i % old_pg_count);
finish_pg_history(new_pg_history[i]);
}
}
else if (!(old_pg_count % new_pg_count))
{
// Old PG count is a multiple of the new PG count
const mul = (old_pg_count / new_pg_count);
for (let i = 0; i < new_pg_count; i++)
{
for (let j = 0; j < mul; j++)
{
add_pg_history(new_pg_history, i, prev_pgs, prev_pg_history, i+j*new_pg_count);
}
finish_pg_history(new_pg_history[i]);
}
}
else
{
// Any PG may intersect with any PG after non-multiple PG count change
// So, merge ALL PGs history
let merged_history = {};
for (let i = 0; i < old_pg_count; i++)
{
add_pg_history(merged_history, 1, prev_pgs, prev_pg_history, i);
}
finish_pg_history(merged_history[1]);
for (let i = 0; i < new_pg_count; i++)
{
new_pg_history[i] = { ...merged_history[1] };
}
}
// Mark history keys for removed PGs as removed
for (let i = new_pg_count; i < old_pg_count; i++)
{
new_pg_history[i] = null;
}
// Just for the lp_solve optimizer - pick a "previous" PG for each "new" one
if (old_pg_count < new_pg_count)
{
for (let i = old_pg_count; i < new_pg_count; i++)
{
prev_pgs[i] = prev_pgs[i % old_pg_count];
}
}
else if (old_pg_count > new_pg_count)
{
prev_pgs.splice(new_pg_count, old_pg_count-new_pg_count);
}
}

View File

@ -1,89 +0,0 @@
// Functions to calculate Annualized Failure Rate of your cluster
// if you know AFR of your drives, number of drives, expected rebalance time
// and replication factor
// License: VNPL-1.1 (see https://yourcmc.ru/git/vitalif/vitastor/src/branch/master/README.md for details) or AGPL-3.0
// Author: Vitaliy Filippov, 2020+
module.exports = {
cluster_afr_fullmesh,
failure_rate_fullmesh,
cluster_afr,
c_n_k,
};
/******** "FULL MESH": ASSUME EACH OSD COMMUNICATES WITH ALL OTHER OSDS ********/
// Estimate AFR of the cluster
// n - number of drives
// afr - annualized failure rate of a single drive
// l - expected rebalance time in days after a single drive failure
// k - replication factor / number of drives that must fail at the same time for the cluster to fail
function cluster_afr_fullmesh(n, afr, l, k)
{
return 1 - (1 - afr * failure_rate_fullmesh(n-(k-1), afr*l/365, k-1)) ** (n-(k-1));
}
// Probability of at least <f> failures in a cluster with <n> drives with AFR=<a>
function failure_rate_fullmesh(n, a, f)
{
if (f <= 0)
{
return (1-a)**n;
}
let p = 1;
for (let i = 0; i < f; i++)
{
p -= c_n_k(n, i) * (1-a)**(n-i) * a**i;
}
return p;
}
/******** PGS: EACH OSD ONLY COMMUNICATES WITH <pgs> OTHER OSDs ********/
// <n> hosts of <m> drives of <capacity> GB, each able to backfill at <speed> GB/s,
// <k> replicas, <pgs> unique peer PGs per OSD (~50 for 100 PG-per-OSD in a big cluster)
//
// For each of n*m drives: P(drive fails in a year) * P(any of its peers fail in <l*365> next days).
// More peers per OSD increase rebalance speed (more drives work together to resilver) if you
// let them finish rebalance BEFORE replacing the failed drive (degraded_replacement=false).
// At the same time, more peers per OSD increase probability of any of them to fail!
// osd_rm=true means that failed OSDs' data is rebalanced over all other hosts,
// not over the same host as it's in Ceph by default (dead OSDs are marked 'out').
//
// Probability of all except one drives in a replica group to fail is (AFR^(k-1)).
// So with <x> PGs it becomes ~ (x * (AFR*L/365)^(k-1)). Interesting but reasonable consequence
// is that, with k=2, total failure rate doesn't depend on number of peers per OSD,
// because it gets increased linearly by increased number of peers to fail
// and decreased linearly by reduced rebalance time.
function cluster_afr({ n_hosts, n_drives, afr_drive, afr_host, capacity, speed, ec, ec_data, ec_parity, replicas, pgs = 1, osd_rm, degraded_replacement, down_out_interval = 600 })
{
const pg_size = (ec ? ec_data+ec_parity : replicas);
pgs = Math.min(pgs, (n_hosts-1)*n_drives/(pg_size-1));
const host_pgs = Math.min(pgs*n_drives, (n_hosts-1)*n_drives/(pg_size-1));
const resilver_disk = n_drives == 1 || osd_rm ? pgs : (n_drives-1);
const disk_heal_time = (down_out_interval + capacity/(degraded_replacement ? 1 : resilver_disk)/speed)/86400/365;
const host_heal_time = (down_out_interval + n_drives*capacity/pgs/speed)/86400/365;
const disk_heal_fail = ((afr_drive+afr_host/n_drives)*disk_heal_time);
const host_heal_fail = ((afr_drive+afr_host/n_drives)*host_heal_time);
const disk_pg_fail = ec
? failure_rate_fullmesh(ec_data+ec_parity-1, disk_heal_fail, ec_parity)
: disk_heal_fail**(replicas-1);
const host_pg_fail = ec
? failure_rate_fullmesh(ec_data+ec_parity-1, host_heal_fail, ec_parity)
: host_heal_fail**(replicas-1);
return 1 - ((1 - afr_drive * (1-(1-disk_pg_fail)**pgs)) ** (n_hosts*n_drives))
* ((1 - afr_host * (1-(1-host_pg_fail)**host_pgs)) ** n_hosts);
}
/******** UTILITY ********/
// Combination count
function c_n_k(n, k)
{
let r = 1;
for (let i = 0; i < k; i++)
{
r *= (n-i) / (i+1);
}
return r;
}

View File

@ -1,28 +0,0 @@
const { sprintf } = require('sprintf-js');
const { cluster_afr } = require('./afr.js');
print_cluster_afr({ n_hosts: 4, n_drives: 6, afr_drive: 0.03, afr_host: 0.05, capacity: 4000, speed: 0.1, replicas: 2 });
print_cluster_afr({ n_hosts: 4, n_drives: 3, afr_drive: 0.03, afr_host: 0, capacity: 4000, speed: 0.1, replicas: 2 });
print_cluster_afr({ n_hosts: 4, n_drives: 3, afr_drive: 0.03, afr_host: 0.05, capacity: 4000, speed: 0.1, replicas: 2 });
print_cluster_afr({ n_hosts: 4, n_drives: 3, afr_drive: 0.03, afr_host: 0, capacity: 4000, speed: 0.1, ec: true, ec_data: 2, ec_parity: 1 });
print_cluster_afr({ n_hosts: 4, n_drives: 3, afr_drive: 0.03, afr_host: 0.05, capacity: 4000, speed: 0.1, ec: true, ec_data: 2, ec_parity: 1 });
print_cluster_afr({ n_hosts: 10, n_drives: 10, afr_drive: 0.1, afr_host: 0, capacity: 8000, speed: 0.02, replicas: 2 });
print_cluster_afr({ n_hosts: 10, n_drives: 10, afr_drive: 0.1, afr_host: 0.05, capacity: 8000, speed: 0.02, replicas: 2 });
print_cluster_afr({ n_hosts: 10, n_drives: 10, afr_drive: 0.1, afr_host: 0, capacity: 8000, speed: 0.02, replicas: 3 });
print_cluster_afr({ n_hosts: 10, n_drives: 10, afr_drive: 0.1, afr_host: 0.05, capacity: 8000, speed: 0.02, replicas: 3 });
print_cluster_afr({ n_hosts: 10, n_drives: 10, afr_drive: 0.1, afr_host: 0, capacity: 8000, speed: 0.02, replicas: 3, pgs: 100 });
print_cluster_afr({ n_hosts: 10, n_drives: 10, afr_drive: 0.1, afr_host: 0.05, capacity: 8000, speed: 0.02, replicas: 3, pgs: 100 });
print_cluster_afr({ n_hosts: 10, n_drives: 10, afr_drive: 0.1, afr_host: 0.05, capacity: 8000, speed: 0.02, replicas: 3, pgs: 100, degraded_replacement: 1 });
function print_cluster_afr(config)
{
console.log(
`${config.n_hosts} nodes with ${config.n_drives} ${sprintf("%.1f", config.capacity/1000)}TB drives`+
`, capable to backfill at ${sprintf("%.1f", config.speed*1000)} MB/s, drive AFR ${sprintf("%.1f", config.afr_drive*100)}%`+
(config.afr_host ? `, host AFR ${sprintf("%.1f", config.afr_host*100)}%` : '')+
(config.ec ? `, EC ${config.ec_data}+${config.ec_parity}` : `, ${config.replicas} replicas`)+
`, ${config.pgs||1} PG per OSD`+
(config.degraded_replacement ? `\n...and you don't let the rebalance finish before replacing drives` : '')
);
console.log('-> '+sprintf("%.7f%%", 100*cluster_afr(config))+'\n');
}

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@ -1,75 +0,0 @@
#!/bin/bash
# Very simple systemd unit generator for vitastor-osd services
# Not the final solution yet, mostly for tests
# 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"
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 '{}'
echo Creating OSD $OSD_NUM on $DEV
OPT=`node $D/simple-offsets.js --device $DEV --format options | tr '\n' ' '`
META=`echo $OPT | grep -Po '(?<=data_offset )\d+'`
dd if=/dev/zero of=$DEV bs=1048576 count=$(((META+1048575)/1048576)) oflag=direct
cat >/etc/systemd/system/vitastor-osd$OSD_NUM.service <<EOF
[Unit]
Description=Vitastor object storage daemon osd.$OSD_NUM
After=network-online.target local-fs.target time-sync.target
Wants=network-online.target local-fs.target time-sync.target
PartOf=vitastor.target
[Service]
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 \\
--disk_alignment 4096 --journal_block_size 4096 --meta_block_size 4096 \\
--journal_no_same_sector_overwrites true \\
--journal_sector_buffer_count 1024 \\
$OPT
WorkingDirectory=/
ExecStartPre=+chown vitastor:vitastor $DEV
User=vitastor
PrivateTmp=false
TasksMax=infinity
Restart=always
StartLimitInterval=0
RestartSec=10
[Install]
WantedBy=vitastor.target
EOF
systemctl enable vitastor-osd$OSD_NUM
done

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@ -1,86 +0,0 @@
#!/bin/bash
# Very simple systemd unit generator for etcd & vitastor-mon services
# Not the final solution yet, mostly for tests
# Copyright (c) Vitaliy Filippov, 2019+
# License: MIT
# USAGE: ./make-units.sh
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"
# determine IP
IP=`ip -json a s | jq -r '.[].addr_info[] | select(.local | startswith("'$IP_SUBSTR'")) | .local'`
[ "$IP" != "" ] || exit 1
ETCD_NUM=${ETCD_HOSTS/$IP*/}
[ "$ETCD_NUM" != "$ETCD_HOSTS" ] || exit 1
ETCD_NUM=$(echo $ETCD_NUM | tr -d -c , | wc -c)
# etcd
useradd etcd
mkdir -p /var/lib/etcd$ETCD_NUM.etcd
cat >/etc/systemd/system/etcd.service <<EOF
[Unit]
Description=etcd for vitastor
After=network-online.target local-fs.target time-sync.target
Wants=network-online.target local-fs.target time-sync.target
[Service]
Restart=always
ExecStart=/usr/local/bin/etcd -name etcd$ETCD_NUM --data-dir /var/lib/etcd$ETCD_NUM.etcd \\
--advertise-client-urls http://$IP:2379 --listen-client-urls http://$IP:2379 \\
--initial-advertise-peer-urls http://$IP:2380 --listen-peer-urls http://$IP:2380 \\
--initial-cluster-token vitastor-etcd-1 --initial-cluster $ETCD_HOSTS \\
--initial-cluster-state new --max-txn-ops=100000 --max-request-bytes=104857600 \\
--auto-compaction-retention=10 --auto-compaction-mode=revision
WorkingDirectory=/var/lib/etcd$ETCD_NUM.etcd
ExecStartPre=+chown -R etcd /var/lib/etcd$ETCD_NUM.etcd
User=etcd
PrivateTmp=false
TasksMax=infinity
Restart=always
StartLimitInterval=0
RestartSec=10
[Install]
WantedBy=local.target
EOF
systemctl daemon-reload
systemctl enable etcd
systemctl start etcd
useradd vitastor
chmod 755 /root
# Vitastor target
cat >/etc/systemd/system/vitastor.target <<EOF
[Unit]
Description=vitastor target
[Install]
WantedBy=multi-user.target
EOF
# Monitor unit
ETCD_MON=$(echo $ETCD_HOSTS | perl -pe 's/:2380/:2379/g; s/etcd\d*=//g;')
cat >/etc/systemd/system/vitastor-mon.service <<EOF
[Unit]
Description=Vitastor monitor
After=network-online.target local-fs.target time-sync.target
Wants=network-online.target local-fs.target time-sync.target
[Service]
Restart=always
ExecStart=node /usr/lib/vitastor/mon/mon-main.js --etcd_url '$ETCD_MON' --etcd_prefix '/vitastor' --etcd_start_timeout 5
WorkingDirectory=/
User=vitastor
PrivateTmp=false
TasksMax=infinity
Restart=always
StartLimitInterval=0
RestartSec=10
[Install]
WantedBy=vitastor.target
EOF

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@ -1,23 +0,0 @@
const fsp = require('fs').promises;
async function merge(file1, file2, out)
{
if (!out)
{
console.error('USAGE: nodejs merge.js layer1 layer2 output');
process.exit();
}
const layer1 = await fsp.readFile(file1);
const layer2 = await fsp.readFile(file2);
const zero = Buffer.alloc(4096);
for (let i = 0; i < layer2.length; i += 4096)
{
if (zero.compare(layer2, i, i+4096) != 0)
{
layer2.copy(layer1, i, i, i+4096);
}
}
await fsp.writeFile(out, layer1);
}
merge(process.argv[2], process.argv[3], process.argv[4]);

1577
mon/mon.js

File diff suppressed because it is too large Load Diff

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@ -1,96 +0,0 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: MIT
// Simple tool to calculate journal and metadata offsets for a single device
// Will be replaced by smarter tools in the future
const fs = require('fs').promises;
const child_process = require('child_process');
async function run()
{
const options = {
object_size: 128*1024,
bitmap_granularity: 4096,
journal_size: 16*1024*1024,
device_block_size: 4096,
journal_offset: 0,
device_size: 0,
format: 'text',
};
for (let i = 2; i < process.argv.length; i++)
{
if (process.argv[i].substr(0, 2) == '--')
{
options[process.argv[i].substr(2)] = process.argv[i+1];
i++;
}
}
if (!options.device)
{
process.stderr.write('USAGE: nodejs '+process.argv[1]+' --device /dev/sdXXX\n');
process.exit(1);
}
options.device_size = Number(options.device_size);
let device_size = options.device_size;
if (!device_size)
{
const st = await fs.stat(options.device);
options.device_block_size = st.blksize;
if (st.isBlockDevice())
device_size = Number(await system("/sbin/blockdev --getsize64 "+options.device))
else
device_size = st.size;
}
if (!device_size)
{
process.stderr.write('Failed to get device size\n');
process.exit(1);
}
options.journal_offset = Math.ceil(options.journal_offset/options.device_block_size)*options.device_block_size;
const meta_offset = options.journal_offset + Math.ceil(options.journal_size/options.device_block_size)*options.device_block_size;
const entries_per_block = Math.floor(options.device_block_size / (24 + 2*options.object_size/options.bitmap_granularity/8));
const object_count = Math.floor((device_size-meta_offset)/options.object_size);
const meta_size = Math.ceil(1 + object_count / entries_per_block) * options.device_block_size;
const data_offset = meta_offset + meta_size;
const meta_size_fmt = (meta_size > 1024*1024*1024 ? Math.round(meta_size/1024/1024/1024*100)/100+" GB"
: Math.round(meta_size/1024/1024*100)/100+" MB");
if (options.format == 'text' || options.format == 'options')
{
if (options.format == 'text')
{
process.stderr.write(
`Metadata size: ${meta_size_fmt}\n`+
`Options for the OSD:\n`
);
}
process.stdout.write(
(options.device_block_size != 4096 ?
` --meta_block_size ${options.device}\n`+
` --journal_block-size ${options.device}\n` : '')+
` --data_device ${options.device}\n`+
` --journal_offset ${options.journal_offset}\n`+
` --meta_offset ${meta_offset}\n`+
` --data_offset ${data_offset}\n`+
(options.device_size ? ` --data_size ${device_size-data_offset}\n` : '')
);
}
else if (options.format == 'env')
{
process.stdout.write(
`journal_offset=${options.journal_offset}\n`+
`meta_offset=${meta_offset}\n`+
`data_offset=${data_offset}\n`+
`data_size=${device_size-data_offset}\n`
);
}
else
process.stdout.write('Unknown format: '+options.format);
}
function system(cmd)
{
return new Promise((ok, no) => child_process.exec(cmd, { maxBuffer: 64*1024*1024 }, (err, stdout, stderr) => (err ? no(err.message) : ok(stdout))));
}
run().catch(err => { console.error(err); process.exit(1); });

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@ -1,78 +0,0 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: MIT
function stableStringify(obj, opts)
{
if (!opts)
opts = {};
if (typeof opts === 'function')
opts = { cmp: opts };
let space = opts.space || '';
if (typeof space === 'number')
space = Array(space+1).join(' ');
const cycles = (typeof opts.cycles === 'boolean') ? opts.cycles : false;
const cmp = opts.cmp && (function (f)
{
return function (node)
{
return function (a, b)
{
let aobj = { key: a, value: node[a] };
let bobj = { key: b, value: node[b] };
return f(aobj, bobj);
};
};
})(opts.cmp);
const seen = new Map();
return (function stringify (parent, key, node, level)
{
const indent = space ? ('\n' + new Array(level + 1).join(space)) : '';
const colonSeparator = space ? ': ' : ':';
if (node === undefined)
{
return;
}
if (typeof node !== 'object' || node === null)
{
return JSON.stringify(node);
}
if (node instanceof Array)
{
const out = [];
for (let i = 0; i < node.length; i++)
{
const item = stringify(node, i, node[i], level+1) || JSON.stringify(null);
out.push(indent + space + item);
}
return '[' + out.join(',') + indent + ']';
}
else
{
if (seen.has(node))
{
if (cycles)
return JSON.stringify('__cycle__');
throw new TypeError('Converting circular structure to JSON');
}
else
seen.set(node, true);
const keys = Object.keys(node).sort(cmp && cmp(node));
const out = [];
for (let i = 0; i < keys.length; i++)
{
const key = keys[i];
const value = stringify(node, key, node[key], level+1);
if (!value)
continue;
const keyValue = JSON.stringify(key)
+ colonSeparator
+ value;
out.push(indent + space + keyValue);
}
seen.delete(node);
return '{' + out.join(',') + indent + '}';
}
})({ '': obj }, '', obj, 0);
}
module.exports = stableStringify;

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@ -1,130 +0,0 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
// Interesting real-world example coming from Ceph with EC and compression enabled.
// EC parity chunks can't be compressed as efficiently as data chunks,
// thus they occupy more space (2.26x more space) in OSD object stores.
// This leads to really uneven OSD fill ratio in Ceph even when PGs are perfectly balanced.
// But we support this case with the "parity_space" parameter in optimize_initial()/optimize_change().
const LPOptimizer = require('./lp-optimizer.js');
const osd_tree = {
ripper5: {
osd0: 3.493144989013672,
osd1: 3.493144989013672,
osd2: 3.454082489013672,
osd12: 3.461894989013672,
},
ripper7: {
osd4: 3.638690948486328,
osd5: 3.638690948486328,
osd6: 3.638690948486328,
},
ripper4: {
osd9: 3.4609375,
osd10: 3.4609375,
osd11: 3.4609375,
},
ripper6: {
osd3: 3.5849609375,
osd7: 3.5859336853027344,
osd8: 3.638690948486328,
osd13: 3.461894989013672
},
};
const prev_pgs = [[12,7,5],[6,11,12],[3,6,9],[10,0,5],[2,5,13],[9,8,6],[3,4,12],[7,4,12],[12,11,13],[13,6,0],[4,13,10],[9,7,6],[7,10,0],[10,8,0],[3,10,2],[3,0,4],[6,13,0],[13,10,0],[13,10,5],[8,11,6],[3,9,2],[2,8,5],[8,9,5],[3,12,11],[0,7,4],[13,11,1],[11,3,12],[12,8,10],[7,5,12],[2,13,5],[7,11,0],[13,2,6],[0,6,8],[13,1,6],[0,13,4],[0,8,10],[4,10,0],[8,12,4],[8,12,9],[12,7,4],[13,9,5],[3,2,11],[1,9,7],[1,8,5],[5,12,9],[3,5,12],[2,8,10],[0,8,4],[1,4,11],[7,10,2],[12,13,5],[3,1,11],[7,1,4],[4,12,8],[7,0,9],[11,1,8],[3,0,5],[11,13,0],[1,13,5],[12,7,10],[12,8,4],[11,13,5],[0,11,6],[2,11,3],[13,1,11],[2,7,10],[7,10,12],[7,12,10],[12,11,5],[13,12,10],[2,3,9],[4,3,9],[13,2,5],[7,12,6],[12,10,13],[9,8,1],[13,1,5],[9,5,12],[5,11,7],[6,2,9],[8,11,6],[12,5,8],[6,13,1],[7,6,11],[2,3,6],[8,5,9],[1,13,6],[9,3,2],[7,11,1],[3,10,1],[0,11,7],[3,0,5],[1,3,6],[6,0,9],[3,11,4],[8,10,2],[13,1,9],[12,6,9],[3,12,9],[12,8,9],[7,5,0],[8,12,5],[0,11,3],[12,11,13],[0,7,11],[0,3,10],[1,3,11],[2,7,11],[13,2,6],[9,12,13],[8,2,4],[0,7,4],[5,13,0],[13,12,9],[1,9,8],[0,10,3],[3,5,10],[7,12,9],[2,13,4],[12,7,5],[9,2,7],[3,2,9],[6,2,7],[3,1,9],[4,3,2],[5,3,11],[0,7,6],[1,6,13],[7,10,2],[12,4,8],[13,12,6],[7,5,11],[6,2,3],[2,7,6],[2,3,10],[2,7,10],[11,12,6],[0,13,5],[10,2,4],[13,0,11],[7,0,6],[8,9,4],[8,4,11],[7,11,2],[3,4,2],[6,1,3],[7,2,11],[8,9,4],[11,4,8],[10,3,1],[2,10,13],[1,7,11],[13,11,12],[2,6,9],[10,0,13],[7,10,4],[0,11,13],[13,10,1],[7,5,0],[7,12,10],[3,1,4],[7,1,5],[3,11,5],[7,5,0],[1,3,5],[10,5,12],[0,3,9],[7,1,11],[11,8,12],[3,6,2],[7,12,9],[7,11,12],[4,11,3],[0,11,13],[13,2,5],[1,5,8],[0,11,8],[3,5,1],[11,0,6],[3,11,2],[11,8,12],[4,1,3],[10,13,4],[13,9,6],[2,3,10],[12,7,9],[10,0,4],[10,13,2],[3,11,1],[7,2,9],[1,7,4],[13,1,4],[7,0,6],[5,3,9],[10,0,7],[0,7,10],[3,6,10],[13,0,5],[8,4,1],[3,1,10],[2,10,13],[13,0,5],[13,10,2],[12,7,9],[6,8,10],[6,1,8],[10,8,1],[13,5,0],[5,11,3],[7,6,1],[8,5,9],[2,13,11],[10,12,4],[13,4,1],[2,13,4],[11,7,0],[2,9,7],[1,7,6],[8,0,4],[8,1,9],[7,10,12],[13,9,6],[7,6,11],[13,0,4],[1,8,4],[3,12,5],[10,3,1],[10,2,13],[2,4,8],[6,2,3],[3,0,10],[6,7,12],[8,12,5],[3,0,6],[13,12,10],[11,3,6],[9,0,13],[10,0,6],[7,5,2],[1,3,11],[7,10,2],[2,9,8],[11,13,12],[0,8,4],[8,12,11],[6,0,3],[1,13,4],[11,8,2],[12,3,6],[4,7,1],[7,6,12],[3,10,6],[0,10,7],[8,9,1],[0,10,6],[8,10,1]]
.map(pg => pg.map(n => 'osd'+n));
const by_osd = {};
for (let i = 0; i < prev_pgs.length; i++)
{
for (let j = 0; j < prev_pgs[i].length; j++)
{
by_osd[prev_pgs[i][j]] = by_osd[prev_pgs[i][j]] || [];
by_osd[prev_pgs[i][j]][j] = (by_osd[prev_pgs[i][j]][j] || 0) + 1;
}
}
/*
This set of PGs was balanced by hand, by heavily tuning OSD weights in Ceph:
{
osd0: 4.2,
osd1: 3.5,
osd2: 3.45409,
osd3: 4.5,
osd4: 1.4,
osd5: 1.4,
osd6: 1.75,
osd7: 4.5,
osd8: 4.4,
osd9: 2.2,
osd10: 2.7,
osd11: 2,
osd12: 3.4,
osd13: 3.4,
}
EC+compression is a nightmare in Ceph, yeah :))
To calculate the average ratio between data chunks and parity chunks we
calculate the number of PG chunks for each chunk role for each OSD:
{
osd12: [ 18, 22, 17 ],
osd7: [ 35, 22, 8 ],
osd5: [ 6, 17, 27 ],
osd6: [ 13, 12, 28 ],
osd11: [ 13, 26, 20 ],
osd3: [ 30, 20, 10 ],
osd9: [ 8, 12, 26 ],
osd10: [ 15, 23, 20 ],
osd0: [ 22, 22, 14 ],
osd2: [ 22, 16, 16 ],
osd13: [ 29, 19, 13 ],
osd8: [ 20, 18, 12 ],
osd4: [ 8, 10, 28 ],
osd1: [ 17, 17, 17 ]
}
And now we can pick a pair of OSDs and determine the ratio by solving the following:
osd5 = 23*X + 27*Y = 3249728140
osd13 = 48*X + 13*Y = 2991675992
=>
osd5 - 27/13*osd13 = 23*X - 27/13*48*X = -76.6923076923077*X = -2963752766.46154
=>
X = 38644720.1243731
Y = (osd5-23*X)/27 = 87440725.0792377
Y/X = 2.26268232239284 ~= 2.26
Which means that parity chunks are compressed ~2.26 times worse than data chunks.
Fine, let's try to optimize for it.
*/
async function run()
{
const all_weights = Object.assign({}, ...Object.values(osd_tree));
const total_weight = Object.values(all_weights).reduce((a, c) => Number(a) + Number(c), 0);
const eff = LPOptimizer.pg_list_space_efficiency(prev_pgs, all_weights, 2, 2.26);
const orig = eff*4.26 / total_weight;
console.log('Original efficiency was: '+Math.round(orig*10000)/100+' %');
let prev = await LPOptimizer.optimize_initial({ osd_tree, pg_size: 3, pg_count: 256, parity_space: 2.26 });
LPOptimizer.print_change_stats(prev);
let next = await LPOptimizer.optimize_change({ prev_pgs, osd_tree, pg_size: 3, max_combinations: 10000, parity_space: 2.26 });
LPOptimizer.print_change_stats(next);
}
run().catch(console.error);

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@ -1,25 +0,0 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
const LPOptimizer = require('./lp-optimizer.js');
async function run()
{
const osd_tree = { a: { 1: 1 }, b: { 2: 1 }, c: { 3: 1 } };
let res;
console.log('16 PGs, size=3');
res = await LPOptimizer.optimize_initial({ osd_tree, pg_size: 3, pg_count: 16 });
LPOptimizer.print_change_stats(res, false);
console.log('\nReduce PG size to 2');
res = await LPOptimizer.optimize_change({ prev_pgs: res.int_pgs.map(pg => pg.slice(0, 2)), osd_tree, pg_size: 2 });
LPOptimizer.print_change_stats(res, false);
console.log('\nRemove OSD 3');
delete osd_tree['c'];
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);

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@ -1,19 +1,14 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 or GNU GPL-2.0+ (see README.md for details)
#pragma once
#include <stdint.h>
#include <functional>
typedef uint64_t inode_t;
// 16 bytes per object/stripe id
// stripe = (start of the parity stripe + peer role)
// i.e. for example (256KB + one of 0,1,2)
struct __attribute__((__packed__)) object_id
{
inode_t inode;
uint64_t inode;
uint64_t stripe;
};

471
osd.cpp Normal file
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@ -0,0 +1,471 @@
#include <sys/socket.h>
#include <sys/epoll.h>
#include <sys/poll.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <arpa/inet.h>
#include "osd.h"
const char* osd_op_names[] = {
"",
"read",
"write",
"sync",
"stabilize",
"rollback",
"delete",
"sync_stab_all",
"list",
"show_config",
"primary_read",
"primary_write",
"primary_sync",
"primary_delete",
};
osd_t::osd_t(blockstore_config_t & config, blockstore_t *bs, ring_loop_t *ringloop)
{
this->config = config;
this->bs = bs;
this->ringloop = ringloop;
this->bs_block_size = bs->get_block_size();
// FIXME: use bitmap granularity instead
this->bs_disk_alignment = bs->get_disk_alignment();
parse_config(config);
epoll_fd = epoll_create(1);
if (epoll_fd < 0)
{
throw std::runtime_error(std::string("epoll_create: ") + strerror(errno));
}
this->tfd = new timerfd_manager_t([this](int fd, bool out, std::function<void(int, int)> handler) { set_fd_handler(fd, out, handler); });
this->tfd->set_timer(print_stats_interval*1000, true, [this](int timer_id)
{
print_stats();
});
c_cli.tfd = this->tfd;
c_cli.ringloop = this->ringloop;
c_cli.exec_op = [this](osd_op_t *op) { exec_op(op); };
c_cli.repeer_pgs = [this](osd_num_t peer_osd) { repeer_pgs(peer_osd); };
init_cluster();
consumer.loop = [this]() { loop(); };
ringloop->register_consumer(&consumer);
}
osd_t::~osd_t()
{
if (tfd)
{
delete tfd;
tfd = NULL;
}
ringloop->unregister_consumer(&consumer);
close(epoll_fd);
close(listen_fd);
}
void osd_t::parse_config(blockstore_config_t & config)
{
int pos;
// Initial startup configuration
{
std::string ea = config["etcd_address"];
while (1)
{
pos = ea.find(',');
std::string addr = pos >= 0 ? ea.substr(0, pos) : ea;
if (addr.length() > 0)
{
if (addr.find('/') < 0)
addr += "/v3";
st_cli.etcd_addresses.push_back(addr);
}
if (pos >= 0)
ea = ea.substr(pos+1);
else
break;
}
}
st_cli.etcd_prefix = config["etcd_prefix"];
if (st_cli.etcd_prefix == "")
st_cli.etcd_prefix = "/microceph";
etcd_report_interval = strtoull(config["etcd_report_interval"].c_str(), NULL, 10);
if (etcd_report_interval <= 0)
etcd_report_interval = 30;
osd_num = strtoull(config["osd_num"].c_str(), NULL, 10);
if (!osd_num)
throw std::runtime_error("osd_num is required in the configuration");
c_cli.osd_num = osd_num;
run_primary = config["run_primary"] != "false" && config["run_primary"] != "0" && config["run_primary"] != "no";
// Cluster configuration
bind_address = config["bind_address"];
if (bind_address == "")
bind_address = "0.0.0.0";
bind_port = stoull_full(config["bind_port"]);
if (bind_port <= 0 || bind_port > 65535)
bind_port = 0;
if (config["immediate_commit"] == "all")
immediate_commit = IMMEDIATE_ALL;
else if (config["immediate_commit"] == "small")
immediate_commit = IMMEDIATE_SMALL;
if (config.find("autosync_interval") != config.end())
{
autosync_interval = strtoull(config["autosync_interval"].c_str(), NULL, 10);
if (autosync_interval > MAX_AUTOSYNC_INTERVAL)
autosync_interval = DEFAULT_AUTOSYNC_INTERVAL;
}
if (config.find("client_queue_depth") != config.end())
{
client_queue_depth = strtoull(config["client_queue_depth"].c_str(), NULL, 10);
if (client_queue_depth < 128)
client_queue_depth = 128;
}
if (config.find("pg_stripe_size") != config.end())
{
pg_stripe_size = strtoull(config["pg_stripe_size"].c_str(), NULL, 10);
if (!pg_stripe_size || !bs_block_size || pg_stripe_size < bs_block_size || (pg_stripe_size % bs_block_size) != 0)
pg_stripe_size = DEFAULT_PG_STRIPE_SIZE;
}
recovery_queue_depth = strtoull(config["recovery_queue_depth"].c_str(), NULL, 10);
if (recovery_queue_depth < 1 || recovery_queue_depth > MAX_RECOVERY_QUEUE)
recovery_queue_depth = DEFAULT_RECOVERY_QUEUE;
if (config["readonly"] == "true" || config["readonly"] == "1" || config["readonly"] == "yes")
readonly = true;
print_stats_interval = strtoull(config["print_stats_interval"].c_str(), NULL, 10);
if (!print_stats_interval)
print_stats_interval = 3;
c_cli.peer_connect_interval = strtoull(config["peer_connect_interval"].c_str(), NULL, 10);
if (!c_cli.peer_connect_interval)
c_cli.peer_connect_interval = 5;
c_cli.peer_connect_timeout = strtoull(config["peer_connect_timeout"].c_str(), NULL, 10);
if (!c_cli.peer_connect_timeout)
c_cli.peer_connect_timeout = 5;
log_level = strtoull(config["log_level"].c_str(), NULL, 10);
st_cli.log_level = log_level;
c_cli.log_level = log_level;
}
void osd_t::bind_socket()
{
listen_fd = socket(AF_INET, SOCK_STREAM, 0);
if (listen_fd < 0)
{
throw std::runtime_error(std::string("socket: ") + strerror(errno));
}
int enable = 1;
setsockopt(listen_fd, SOL_SOCKET, SO_REUSEADDR, &enable, sizeof(enable));
sockaddr_in addr;
int r;
if ((r = inet_pton(AF_INET, bind_address.c_str(), &addr.sin_addr)) != 1)
{
close(listen_fd);
throw std::runtime_error("bind address "+bind_address+(r == 0 ? " is not valid" : ": no ipv4 support"));
}
addr.sin_family = AF_INET;
addr.sin_port = htons(bind_port);
if (bind(listen_fd, (sockaddr*)&addr, sizeof(addr)) < 0)
{
close(listen_fd);
throw std::runtime_error(std::string("bind: ") + strerror(errno));
}
if (bind_port == 0)
{
socklen_t len = sizeof(addr);
if (getsockname(listen_fd, (sockaddr *)&addr, &len) == -1)
{
close(listen_fd);
throw std::runtime_error(std::string("getsockname: ") + strerror(errno));
}
listening_port = ntohs(addr.sin_port);
}
else
{
listening_port = bind_port;
}
if (listen(listen_fd, listen_backlog) < 0)
{
close(listen_fd);
throw std::runtime_error(std::string("listen: ") + strerror(errno));
}
fcntl(listen_fd, F_SETFL, fcntl(listen_fd, F_GETFL, 0) | O_NONBLOCK);
epoll_event ev;
ev.data.fd = listen_fd;
ev.events = EPOLLIN;
if (epoll_ctl(epoll_fd, EPOLL_CTL_ADD, listen_fd, &ev) < 0)
{
close(listen_fd);
close(epoll_fd);
throw std::runtime_error(std::string("epoll_ctl: ") + strerror(errno));
}
}
bool osd_t::shutdown()
{
stopping = true;
if (inflight_ops > 0)
{
return false;
}
return bs->is_safe_to_stop();
}
void osd_t::loop()
{
if (!wait_state)
{
handle_epoll_events();
wait_state = 1;
}
handle_peers();
c_cli.read_requests();
c_cli.send_replies();
ringloop->submit();
}
void osd_t::set_fd_handler(int fd, bool out, std::function<void(int, int)> handler)
{
if (handler != NULL)
{
bool exists = epoll_handlers.find(fd) != epoll_handlers.end();
epoll_event ev;
ev.data.fd = fd;
ev.events = EPOLLIN | (out ? EPOLLOUT : 0) | EPOLLRDHUP;
if (epoll_ctl(epoll_fd, exists ? EPOLL_CTL_MOD : EPOLL_CTL_ADD, fd, &ev) < 0)
{
throw std::runtime_error(std::string("epoll_ctl: ") + strerror(errno));
}
epoll_handlers[fd] = handler;
}
else
{
if (epoll_ctl(epoll_fd, EPOLL_CTL_DEL, fd, NULL) < 0 && errno != ENOENT)
{
throw std::runtime_error(std::string("epoll_ctl: ") + strerror(errno));
}
epoll_handlers.erase(fd);
}
}
void osd_t::handle_epoll_events()
{
wait_state = 0;
{
timespec now;
clock_gettime(CLOCK_REALTIME, &now);
printf("get_sqe %s %d %ld.%06ld\n", __FILE__, __LINE__, now.tv_sec, now.tv_nsec/1000);
}
io_uring_sqe *sqe = ringloop->get_sqe();
if (!sqe)
{
return;
}
wait_state = 1;
ring_data_t *data = ((ring_data_t*)sqe->user_data);
my_uring_prep_poll_add(sqe, epoll_fd, POLLIN);
data->callback = [this](ring_data_t *data)
{
if (data->res < 0)
{
throw std::runtime_error(std::string("epoll failed: ") + strerror(-data->res));
}
handle_epoll_events();
};
int nfds;
epoll_event events[MAX_EPOLL_EVENTS];
restart:
nfds = epoll_wait(epoll_fd, events, MAX_EPOLL_EVENTS, 0);
for (int i = 0; i < nfds; i++)
{
if (events[i].data.fd == listen_fd)
{
// Accept new connections
sockaddr_in addr;
socklen_t peer_addr_size = sizeof(addr);
int peer_fd;
while ((peer_fd = accept(listen_fd, (sockaddr*)&addr, &peer_addr_size)) >= 0)
{
assert(peer_fd != 0);
char peer_str[256];
printf("[OSD %lu] new client %d: connection from %s port %d\n", this->osd_num, peer_fd,
inet_ntop(AF_INET, &addr.sin_addr, peer_str, 256), ntohs(addr.sin_port));
fcntl(peer_fd, F_SETFL, fcntl(listen_fd, F_GETFL, 0) | O_NONBLOCK);
int one = 1;
setsockopt(peer_fd, SOL_TCP, TCP_NODELAY, &one, sizeof(one));
c_cli.clients[peer_fd] = {
.peer_addr = addr,
.peer_port = ntohs(addr.sin_port),
.peer_fd = peer_fd,
.peer_state = PEER_CONNECTED,
.in_buf = malloc(c_cli.receive_buffer_size),
};
// Add FD to epoll
set_fd_handler(peer_fd, false, [this](int peer_fd, int epoll_events)
{
c_cli.handle_peer_epoll(peer_fd, epoll_events);
});
// Try to accept next connection
peer_addr_size = sizeof(addr);
}
if (peer_fd == -1 && errno != EAGAIN)
{
throw std::runtime_error(std::string("accept: ") + strerror(errno));
}
}
else
{
auto & cb = epoll_handlers[events[i].data.fd];
cb(events[i].data.fd, events[i].events);
}
}
printf("%d events\n", nfds);
if (nfds == MAX_EPOLL_EVENTS)
{
goto restart;
}
}
void osd_t::exec_op(osd_op_t *cur_op)
{
clock_gettime(CLOCK_REALTIME, &cur_op->tv_begin);
if (stopping)
{
// Throw operation away
delete cur_op;
return;
}
inflight_ops++;
cur_op->send_list.push_back(cur_op->reply.buf, OSD_PACKET_SIZE);
if (cur_op->req.hdr.magic != SECONDARY_OSD_OP_MAGIC ||
cur_op->req.hdr.opcode < OSD_OP_MIN || cur_op->req.hdr.opcode > OSD_OP_MAX ||
(cur_op->req.hdr.opcode == OSD_OP_SECONDARY_READ || cur_op->req.hdr.opcode == OSD_OP_SECONDARY_WRITE) &&
(cur_op->req.sec_rw.len > OSD_RW_MAX || cur_op->req.sec_rw.len % bs_disk_alignment || cur_op->req.sec_rw.offset % bs_disk_alignment) ||
(cur_op->req.hdr.opcode == OSD_OP_READ || cur_op->req.hdr.opcode == OSD_OP_WRITE || cur_op->req.hdr.opcode == OSD_OP_DELETE) &&
(cur_op->req.rw.len > OSD_RW_MAX || cur_op->req.rw.len % bs_disk_alignment || cur_op->req.rw.offset % bs_disk_alignment))
{
// Bad command
finish_op(cur_op, -EINVAL);
return;
}
if (readonly &&
cur_op->req.hdr.opcode != OSD_OP_SECONDARY_READ &&
cur_op->req.hdr.opcode != OSD_OP_SECONDARY_LIST &&
cur_op->req.hdr.opcode != OSD_OP_READ &&
cur_op->req.hdr.opcode != OSD_OP_SHOW_CONFIG)
{
// Readonly mode
finish_op(cur_op, -EROFS);
return;
}
if (cur_op->req.hdr.opcode == OSD_OP_TEST_SYNC_STAB_ALL)
{
exec_sync_stab_all(cur_op);
}
else if (cur_op->req.hdr.opcode == OSD_OP_SHOW_CONFIG)
{
exec_show_config(cur_op);
}
else if (cur_op->req.hdr.opcode == OSD_OP_READ)
{
continue_primary_read(cur_op);
}
else if (cur_op->req.hdr.opcode == OSD_OP_WRITE)
{
continue_primary_write(cur_op);
}
else if (cur_op->req.hdr.opcode == OSD_OP_SYNC)
{
continue_primary_sync(cur_op);
}
else if (cur_op->req.hdr.opcode == OSD_OP_DELETE)
{
continue_primary_del(cur_op);
}
else
{
exec_secondary(cur_op);
}
}
void osd_t::reset_stats()
{
c_cli.stats = { 0 };
prev_stats = { 0 };
memset(recovery_stat_count, 0, sizeof(recovery_stat_count));
memset(recovery_stat_bytes, 0, sizeof(recovery_stat_bytes));
}
void osd_t::print_stats()
{
for (int i = 0; i <= OSD_OP_MAX; i++)
{
if (c_cli.stats.op_stat_count[i] != prev_stats.op_stat_count[i])
{
uint64_t avg = (c_cli.stats.op_stat_sum[i] - prev_stats.op_stat_sum[i])/(c_cli.stats.op_stat_count[i] - prev_stats.op_stat_count[i]);
uint64_t bw = (c_cli.stats.op_stat_bytes[i] - prev_stats.op_stat_bytes[i]) / print_stats_interval;
if (c_cli.stats.op_stat_bytes[i] != 0)
{
printf(
"[OSD %lu] avg latency for op %d (%s): %lu us, B/W: %.2f %s\n", osd_num, i, osd_op_names[i], avg,
(bw > 1024*1024*1024 ? bw/1024.0/1024/1024 : (bw > 1024*1024 ? bw/1024.0/1024 : bw/1024.0)),
(bw > 1024*1024*1024 ? "GB/s" : (bw > 1024*1024 ? "MB/s" : "KB/s"))
);
}
else
{
printf("[OSD %lu] avg latency for op %d (%s): %lu us\n", osd_num, i, osd_op_names[i], avg);
}
prev_stats.op_stat_count[i] = c_cli.stats.op_stat_count[i];
prev_stats.op_stat_sum[i] = c_cli.stats.op_stat_sum[i];
prev_stats.op_stat_bytes[i] = c_cli.stats.op_stat_bytes[i];
}
}
for (int i = 0; i <= OSD_OP_MAX; i++)
{
if (c_cli.stats.subop_stat_count[i] != prev_stats.subop_stat_count[i])
{
uint64_t avg = (c_cli.stats.subop_stat_sum[i] - prev_stats.subop_stat_sum[i])/(c_cli.stats.subop_stat_count[i] - prev_stats.subop_stat_count[i]);
printf("[OSD %lu] avg latency for subop %d (%s): %ld us\n", osd_num, i, osd_op_names[i], avg);
prev_stats.subop_stat_count[i] = c_cli.stats.subop_stat_count[i];
prev_stats.subop_stat_sum[i] = c_cli.stats.subop_stat_sum[i];
}
}
for (int i = 0; i < 2; i++)
{
if (recovery_stat_count[0][i] != recovery_stat_count[1][i])
{
uint64_t bw = (recovery_stat_bytes[0][i] - recovery_stat_bytes[1][i]) / print_stats_interval;
printf(
"[OSD %lu] %s recovery: %.1f op/s, B/W: %.2f %s\n", osd_num, recovery_stat_names[i],
(recovery_stat_count[0][i] - recovery_stat_count[1][i]) * 1.0 / print_stats_interval,
(bw > 1024*1024*1024 ? bw/1024.0/1024/1024 : (bw > 1024*1024 ? bw/1024.0/1024 : bw/1024.0)),
(bw > 1024*1024*1024 ? "GB/s" : (bw > 1024*1024 ? "MB/s" : "KB/s"))
);
recovery_stat_count[1][i] = recovery_stat_count[0][i];
recovery_stat_bytes[1][i] = recovery_stat_bytes[0][i];
}
}
if (incomplete_objects > 0)
{
printf("[OSD %lu] %lu object(s) incomplete\n", osd_num, incomplete_objects);
}
if (degraded_objects > 0)
{
printf("[OSD %lu] %lu object(s) degraded\n", osd_num, degraded_objects);
}
if (misplaced_objects > 0)
{
printf("[OSD %lu] %lu object(s) misplaced\n", osd_num, misplaced_objects);
}
}

View File

@ -1,6 +1,3 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
#pragma once
#include <sys/types.h>
@ -19,9 +16,8 @@
#include "blockstore.h"
#include "ringloop.h"
#include "timerfd_manager.h"
#include "epoll_manager.h"
#include "osd_peering_pg.h"
#include "messenger.h"
#include "cluster_client.h"
#include "etcd_state_client.h"
#define OSD_LOADING_PGS 0x01
@ -37,10 +33,12 @@
#define DEFAULT_AUTOSYNC_INTERVAL 5
#define MAX_RECOVERY_QUEUE 2048
#define DEFAULT_RECOVERY_QUEUE 4
#define DEFAULT_RECOVERY_BATCH 16
#define DEFAULT_PG_STRIPE_SIZE 4*1024*1024 // 4 MB by default
//#define OSD_STUB
extern const char* osd_op_names[];
struct osd_object_id_t
{
osd_num_t osd_num;
@ -51,92 +49,53 @@ struct osd_recovery_op_t
{
int st = 0;
bool degraded = false;
pg_num_t pg_num = 0;
object_id oid = { 0 };
osd_op_t *osd_op = NULL;
};
// Posted as /osd/inodestats/$osd, then accumulated by the monitor
#define INODE_STATS_READ 0
#define INODE_STATS_WRITE 1
#define INODE_STATS_DELETE 2
struct inode_stats_t
{
uint64_t op_sum[3] = { 0 };
uint64_t op_count[3] = { 0 };
uint64_t op_bytes[3] = { 0 };
};
struct bitmap_request_t
{
osd_num_t osd_num;
object_id oid;
uint64_t version;
void *bmp_buf;
};
inline bool operator < (const bitmap_request_t & a, const bitmap_request_t & b)
{
return a.osd_num < b.osd_num || a.osd_num == b.osd_num && a.oid < b.oid;
}
struct osd_chain_read_t
{
int chain_pos;
inode_t inode;
uint32_t offset, len;
};
struct osd_rmw_stripe_t;
class osd_t
{
// config
json11::Json::object config;
blockstore_config_t config;
int etcd_report_interval = 30;
bool readonly = false;
osd_num_t osd_num = 1; // OSD numbers start with 1
bool run_primary = false;
bool no_rebalance = false;
bool no_recovery = false;
std::string bind_address;
int bind_port, listen_backlog;
// FIXME: Implement client queue depth limit
int client_queue_depth = 128;
bool allow_test_ops = false;
bool allow_test_ops = true;
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 recovery_queue_depth = DEFAULT_RECOVERY_QUEUE;
int recovery_sync_batch = DEFAULT_RECOVERY_BATCH;
int log_level = 0;
// cluster state
etcd_state_client_t st_cli;
osd_messenger_t msgr;
cluster_client_t c_cli;
int etcd_failed_attempts = 0;
std::string etcd_lease_id;
json11::Json self_state;
bool loading_peer_config = false;
std::set<pool_pg_num_t> pg_state_dirty;
std::set<pg_num_t> pg_state_dirty;
bool pg_config_applied = false;
bool etcd_reporting_pg_state = false;
bool etcd_reporting_stats = false;
// peers and PGs
std::map<pool_id_t, pg_num_t> pg_counts;
std::map<pool_pg_num_t, pg_t> pgs;
std::set<pool_pg_num_t> dirty_pgs;
std::set<osd_num_t> dirty_osds;
int copies_to_delete_after_sync_count = 0;
std::map<pg_num_t, pg_t> pgs;
std::set<pg_num_t> dirty_pgs;
uint64_t misplaced_objects = 0, degraded_objects = 0, incomplete_objects = 0;
int peering_state = 0;
unsigned pg_count = 0;
std::map<object_id, osd_recovery_op_t> recovery_ops;
int recovery_done = 0;
osd_op_t *autosync_op = NULL;
// Unstable writes
@ -148,30 +107,29 @@ class osd_t
bool stopping = false;
int inflight_ops = 0;
blockstore_t *bs;
void *zero_buffer = NULL;
uint64_t zero_buffer_size = 0;
uint32_t bs_block_size, bs_bitmap_granularity, clean_entry_bitmap_size;
uint32_t bs_block_size, bs_disk_alignment;
uint64_t pg_stripe_size = DEFAULT_PG_STRIPE_SIZE;
ring_loop_t *ringloop;
timerfd_manager_t *tfd = NULL;
epoll_manager_t *epmgr = NULL;
int wait_state = 0;
int epoll_fd = 0;
int listening_port = 0;
int listen_fd = 0;
ring_consumer_t consumer;
std::map<int, std::function<void(int, int)>> epoll_handlers;
// op statistics
osd_op_stats_t prev_stats;
std::map<uint64_t, inode_stats_t> inode_stats;
const char* recovery_stat_names[2] = { "degraded", "misplaced" };
uint64_t recovery_stat_count[2][2] = { 0 };
uint64_t recovery_stat_bytes[2][2] = { 0 };
// cluster connection
void parse_config(const json11::Json & config);
void parse_config(blockstore_config_t & config);
void init_cluster();
void on_change_osd_state_hook(osd_num_t peer_osd);
void on_change_pg_history_hook(pool_id_t pool_id, pg_num_t pg_num);
void on_change_etcd_state_hook(std::map<std::string, etcd_kv_t> & changes);
void on_change_osd_state_hook(uint64_t osd_num);
void on_change_etcd_state_hook(json11::Json::object & changes);
void on_load_config_hook(json11::Json::object & changes);
json11::Json on_load_pgs_checks_hook();
void on_load_pgs_hook(bool success);
@ -181,7 +139,6 @@ class osd_t
void create_osd_state();
void renew_lease();
void print_stats();
void print_slow();
void reset_stats();
json11::Json get_statistics();
void report_statistics();
@ -192,23 +149,24 @@ class osd_t
// event loop, socket read/write
void loop();
void set_fd_handler(int fd, bool out, std::function<void(int, int)> handler);
void handle_epoll_events();
// peer handling (primary OSD logic)
void parse_test_peer(std::string peer);
void handle_peers();
void repeer_pgs(osd_num_t osd_num);
void start_pg_peering(pg_t & pg);
void start_pg_peering(pg_num_t pg_num);
void submit_sync_and_list_subop(osd_num_t role_osd, pg_peering_state_t *ps);
void submit_list_subop(osd_num_t role_osd, pg_peering_state_t *ps);
void discard_list_subop(osd_op_t *list_op);
bool stop_pg(pg_t & pg);
void reset_pg(pg_t & pg);
bool stop_pg(pg_num_t pg_num);
void finish_stop_pg(pg_t & pg);
// flushing, recovery and backfill
void submit_pg_flush_ops(pg_t & pg);
void handle_flush_op(bool rollback, pool_id_t pool_id, pg_num_t pg_num, pg_flush_batch_t *fb, osd_num_t peer_osd, int retval);
void submit_flush_op(pool_id_t pool_id, pg_num_t pg_num, pg_flush_batch_t *fb, bool rollback, osd_num_t peer_osd, int count, obj_ver_id *data);
void submit_pg_flush_ops(pg_num_t pg_num);
void handle_flush_op(bool rollback, pg_num_t pg_num, pg_flush_batch_t *fb, osd_num_t peer_osd, int retval);
void submit_flush_op(pg_num_t pg_num, pg_flush_batch_t *fb, bool rollback, osd_num_t peer_osd, int count, obj_ver_id *data);
bool pick_next_recovery(osd_recovery_op_t &op);
void submit_recovery_op(osd_recovery_op_t *op);
bool continue_recovery();
@ -229,46 +187,27 @@ class osd_t
bool prepare_primary_rw(osd_op_t *cur_op);
void continue_primary_read(osd_op_t *cur_op);
void continue_primary_write(osd_op_t *cur_op);
void cancel_primary_write(osd_op_t *cur_op);
void continue_primary_sync(osd_op_t *cur_op);
void continue_primary_del(osd_op_t *cur_op);
bool check_write_queue(osd_op_t *cur_op, pg_t & pg);
void remove_object_from_state(object_id & oid, pg_osd_set_state_t *object_state, pg_t &pg);
void free_object_state(pg_t & pg, pg_osd_set_state_t **object_state);
bool remember_unstable_write(osd_op_t *cur_op, pg_t & pg, pg_osd_set_t & loc_set, int base_state);
void handle_primary_subop(osd_op_t *subop, osd_op_t *cur_op);
bool finalize_primary_write(osd_op_t *cur_op, pg_t & pg, pg_osd_set_t & loc_set, int base_state);
void handle_primary_subop(uint64_t opcode, osd_op_t *cur_op, int retval, int expected, uint64_t version);
void handle_primary_bs_subop(osd_op_t *subop);
void add_bs_subop_stats(osd_op_t *subop);
void pg_cancel_write_queue(pg_t & pg, osd_op_t *first_op, object_id oid, int retval);
void submit_primary_subops(int submit_type, uint64_t op_version, const uint64_t* osd_set, osd_op_t *cur_op);
int submit_primary_subop_batch(int submit_type, inode_t inode, uint64_t op_version,
osd_rmw_stripe_t *stripes, const uint64_t* osd_set, osd_op_t *cur_op, int subop_idx, int zero_read);
void submit_primary_del_subops(osd_op_t *cur_op, uint64_t *cur_set, uint64_t set_size, pg_osd_set_t & loc_set);
void submit_primary_del_batch(osd_op_t *cur_op, obj_ver_osd_t *chunks_to_delete, int chunks_to_delete_count);
int submit_primary_sync_subops(osd_op_t *cur_op);
void pg_cancel_write_queue(pg_t & pg, object_id oid, int retval);
void submit_primary_subops(int submit_type, int read_pg_size, const uint64_t* osd_set, osd_op_t *cur_op);
void submit_primary_del_subops(osd_op_t *cur_op, uint64_t *cur_set, pg_osd_set_t & loc_set);
void submit_primary_sync_subops(osd_op_t *cur_op);
void submit_primary_stab_subops(osd_op_t *cur_op);
uint64_t* get_object_osd_set(pg_t &pg, object_id &oid, uint64_t *def, pg_osd_set_state_t **object_state);
void continue_chained_read(osd_op_t *cur_op);
int submit_chained_read_requests(pg_t & pg, osd_op_t *cur_op);
void send_chained_read_results(pg_t & pg, osd_op_t *cur_op);
std::vector<osd_chain_read_t> collect_chained_read_requests(osd_op_t *cur_op);
int collect_bitmap_requests(osd_op_t *cur_op, pg_t & pg, std::vector<bitmap_request_t> & bitmap_requests);
int submit_bitmap_subops(osd_op_t *cur_op, pg_t & pg);
int read_bitmaps(osd_op_t *cur_op, pg_t & pg, int base_state);
inline pg_num_t map_to_pg(object_id oid, uint64_t pg_stripe_size)
inline pg_num_t map_to_pg(object_id oid)
{
uint64_t pg_count = pg_counts[INODE_POOL(oid.inode)];
if (!pg_count)
pg_count = 1;
return (oid.stripe / pg_stripe_size) % pg_count + 1;
return (oid.inode + oid.stripe / pg_stripe_size) % pg_count + 1;
}
public:
osd_t(const json11::Json & config, ring_loop_t *ringloop);
osd_t(blockstore_config_t & config, blockstore_t *bs, ring_loop_t *ringloop);
~osd_t();
void force_stop(int exitcode);
bool shutdown();

Some files were not shown because too many files have changed in this diff Show More