Trace I/O operations (SQEs, recvmsg/sendmsg, uring_submit)

.dockerignore

@@ -1,19 +0,0 @@
-.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

.gitignore

@@ -1,18 +0,0 @@
-*.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

.gitmodules

@@ -1,6 +0,0 @@
-[submodule "cpp-btree"]
-	path = cpp-btree
-	url = ../cpp-btree.git
-[submodule "json11"]
-	path = json11
-	url = ../json11.git

CMakeLists.txt

@@ -1,7 +0,0 @@
-cmake_minimum_required(VERSION 2.8)
-
-project(vitastor)
-
-set(VERSION "0.6.17")
-
-add_subdirectory(src)

GPL-2.0.txt

@@ -1,339 +0,0 @@
-                    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.
-
-                            Preamble
-
-  The licenses for most software are designed to take away your
-freedom to share and change it.  By contrast, the GNU General Public
-License is intended to guarantee your freedom to share and change free
-software--to make sure the software is free for all its users.  This
-General Public License applies to most of the Free Software
-Foundation's software and to any other program whose authors commit to
-using it.  (Some other Free Software Foundation software is covered by
-the GNU Lesser General Public License instead.)  You can apply it to
-your programs, too.
-
-  When we speak of free software, we are referring to freedom, not
-price.  Our General Public Licenses are designed to make sure that you
-have the freedom to distribute copies of free software (and charge for
-this service 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.
-
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-modification follow.
-
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-   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
-
-  0. This License applies to any program or other work which contains
-a notice placed by the copyright holder saying it may be distributed
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-    Copyright (C) <year>  <name of author>
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-    it under the terms of the GNU General Public License as published by
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-    but WITHOUT ANY WARRANTY; without even the implied warranty of
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-library.  If this is what you want to do, use the GNU Lesser General
-Public License instead of this License.

LICENSE

@@ -1,27 +0,0 @@
-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).

Make-gen.pl

@@ -0,0 +1,46 @@
+#!/usr/bin/perl
+
+use strict;
+
+my $deps = {};
+for my $line (split /\n/, `grep '^#include "' *.cpp *.h`)
+{
+    if ($line =~ /^([^:]+):\#include "([^"]+)"/s)
+    {
+        $deps->{$1}->{$2} = 1;
+    }
+}
+
+my $added;
+do
+{
+    $added = 0;
+    for my $file (keys %$deps)
+    {
+        for my $dep (keys %{$deps->{$file}})
+        {
+            if ($deps->{$dep})
+            {
+                for my $subdep (keys %{$deps->{$dep}})
+                {
+                    if (!$deps->{$file}->{$subdep})
+                    {
+                        $added = 1;
+                        $deps->{$file}->{$subdep} = 1;
+                    }
+                }
+            }
+        }
+    }
+} while ($added);
+
+for my $file (sort keys %$deps)
+{
+    if ($file =~ /\.cpp$/)
+    {
+        my $obj = $file;
+        $obj =~ s/\.cpp$/.o/s;
+        print "$obj: $file ".join(" ", sort keys %{$deps->{$file}})."\n";
+        print "\tg++ \$(CXXFLAGS) -c -o \$\@ \$\<\n";
+    }
+}

Makefile

@@ -0,0 +1,153 @@
+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: libfio_blockstore.so osd libfio_sec_osd.so libfio_cluster.so stub_osd stub_uring_osd stub_bench osd_test dump_journal
+clean:
+	rm -f *.o
+
+dump_journal: dump_journal.cpp crc32c.o blockstore_journal.h
+	g++ $(CXXFLAGS) -o $@ $< crc32c.o
+
+libblockstore.so: $(BLOCKSTORE_OBJS)
+	g++ $(CXXFLAGS) -o $@ -shared $(BLOCKSTORE_OBJS) -ltcmalloc_minimal -luring
+libfio_blockstore.so: ./libblockstore.so fio_engine.o json11.o
+	g++ $(CXXFLAGS) -shared -o $@ fio_engine.o json11.o ./libblockstore.so -ltcmalloc_minimal -luring
+
+OSD_OBJS := osd.o osd_secondary.o msgr_receive.o msgr_send.o osd_peering.o osd_flush.o osd_peering_pg.o \
+	osd_primary.o osd_primary_subops.o etcd_state_client.o messenger.o osd_cluster.o http_client.o pg_states.o \
+	osd_rmw.o json11.o base64.o timerfd_manager.o
+osd: ./libblockstore.so osd_main.cpp osd.h osd_ops.h $(OSD_OBJS)
+	g++ $(CXXFLAGS) -o $@ osd_main.cpp $(OSD_OBJS) ./libblockstore.so -ltcmalloc_minimal -luring
+
+stub_osd: stub_osd.o rw_blocking.o
+	g++ $(CXXFLAGS) -o $@ stub_osd.o rw_blocking.o -ltcmalloc_minimal
+
+STUB_URING_OSD_OBJS := stub_uring_osd.o epoll_manager.o messenger.o msgr_send.o msgr_receive.o ringloop.o timerfd_manager.o json11.o
+stub_uring_osd: $(STUB_URING_OSD_OBJS)
+	g++ $(CXXFLAGS) -o $@ -ltcmalloc_minimal $(STUB_URING_OSD_OBJS) -luring
+stub_bench: stub_bench.cpp osd_ops.h rw_blocking.o
+	g++ $(CXXFLAGS) -o $@ stub_bench.cpp rw_blocking.o -ltcmalloc_minimal
+osd_test: osd_test.cpp osd_ops.h rw_blocking.o
+	g++ $(CXXFLAGS) -o $@ 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.o rw_blocking.o
+	g++ $(CXXFLAGS) -ltcmalloc_minimal -shared -o $@ fio_sec_osd.o rw_blocking.o
+
+FIO_CLUSTER_OBJS := fio_cluster.o cluster_client.o epoll_manager.o etcd_state_client.o \
+	messenger.o msgr_send.o msgr_receive.o ringloop.o json11.o http_client.o pg_states.o timerfd_manager.o base64.o
+libfio_cluster.so: $(FIO_CLUSTER_OBJS)
+	g++ $(CXXFLAGS) -ltcmalloc_minimal -shared -o $@ $(FIO_CLUSTER_OBJS) -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
+
+crc32c.o: crc32c.c crc32c.h
+	g++ $(CXXFLAGS) -c -o $@ $<
+json11.o: json11/json11.cpp
+	g++ $(CXXFLAGS) -c -o json11.o json11/json11.cpp
+
+# Autogenerated
+
+allocator.o: allocator.cpp allocator.h
+	g++ $(CXXFLAGS) -c -o $@ $<
+base64.o: base64.cpp base64.h
+	g++ $(CXXFLAGS) -c -o $@ $<
+blockstore.o: blockstore.cpp allocator.h blockstore.h blockstore_flush.h blockstore_impl.h blockstore_init.h blockstore_journal.h cpp-btree/btree_map.h crc32c.h object_id.h ringloop.h
+	g++ $(CXXFLAGS) -c -o $@ $<
+blockstore_flush.o: blockstore_flush.cpp allocator.h blockstore.h blockstore_flush.h blockstore_impl.h blockstore_init.h blockstore_journal.h cpp-btree/btree_map.h crc32c.h object_id.h ringloop.h
+	g++ $(CXXFLAGS) -c -o $@ $<
+blockstore_impl.o: blockstore_impl.cpp allocator.h blockstore.h blockstore_flush.h blockstore_impl.h blockstore_init.h blockstore_journal.h cpp-btree/btree_map.h crc32c.h object_id.h ringloop.h
+	g++ $(CXXFLAGS) -c -o $@ $<
+blockstore_init.o: blockstore_init.cpp allocator.h blockstore.h blockstore_flush.h blockstore_impl.h blockstore_init.h blockstore_journal.h cpp-btree/btree_map.h crc32c.h object_id.h ringloop.h
+	g++ $(CXXFLAGS) -c -o $@ $<
+blockstore_journal.o: blockstore_journal.cpp allocator.h blockstore.h blockstore_flush.h blockstore_impl.h blockstore_init.h blockstore_journal.h cpp-btree/btree_map.h crc32c.h object_id.h ringloop.h
+	g++ $(CXXFLAGS) -c -o $@ $<
+blockstore_open.o: blockstore_open.cpp allocator.h blockstore.h blockstore_flush.h blockstore_impl.h blockstore_init.h blockstore_journal.h cpp-btree/btree_map.h crc32c.h object_id.h ringloop.h
+	g++ $(CXXFLAGS) -c -o $@ $<
+blockstore_read.o: blockstore_read.cpp allocator.h blockstore.h blockstore_flush.h blockstore_impl.h blockstore_init.h blockstore_journal.h cpp-btree/btree_map.h crc32c.h object_id.h ringloop.h
+	g++ $(CXXFLAGS) -c -o $@ $<
+blockstore_rollback.o: blockstore_rollback.cpp allocator.h blockstore.h blockstore_flush.h blockstore_impl.h blockstore_init.h blockstore_journal.h cpp-btree/btree_map.h crc32c.h object_id.h ringloop.h
+	g++ $(CXXFLAGS) -c -o $@ $<
+blockstore_stable.o: blockstore_stable.cpp allocator.h blockstore.h blockstore_flush.h blockstore_impl.h blockstore_init.h blockstore_journal.h cpp-btree/btree_map.h crc32c.h object_id.h ringloop.h
+	g++ $(CXXFLAGS) -c -o $@ $<
+blockstore_sync.o: blockstore_sync.cpp allocator.h blockstore.h blockstore_flush.h blockstore_impl.h blockstore_init.h blockstore_journal.h cpp-btree/btree_map.h crc32c.h object_id.h ringloop.h
+	g++ $(CXXFLAGS) -c -o $@ $<
+blockstore_write.o: blockstore_write.cpp allocator.h blockstore.h blockstore_flush.h blockstore_impl.h blockstore_init.h blockstore_journal.h cpp-btree/btree_map.h crc32c.h object_id.h ringloop.h
+	g++ $(CXXFLAGS) -c -o $@ $<
+cluster_client.o: cluster_client.cpp cluster_client.h etcd_state_client.h http_client.h json11/json11.hpp messenger.h object_id.h osd_id.h osd_ops.h ringloop.h timerfd_manager.h
+	g++ $(CXXFLAGS) -c -o $@ $<
+dump_journal.o: dump_journal.cpp allocator.h blockstore.h blockstore_flush.h blockstore_impl.h blockstore_init.h blockstore_journal.h cpp-btree/btree_map.h crc32c.h object_id.h ringloop.h
+	g++ $(CXXFLAGS) -c -o $@ $<
+epoll_manager.o: epoll_manager.cpp epoll_manager.h ringloop.h timerfd_manager.h
+	g++ $(CXXFLAGS) -c -o $@ $<
+etcd_state_client.o: etcd_state_client.cpp base64.h etcd_state_client.h http_client.h json11/json11.hpp object_id.h osd_id.h osd_ops.h pg_states.h timerfd_manager.h
+	g++ $(CXXFLAGS) -c -o $@ $<
+fio_cluster.o: fio_cluster.cpp cluster_client.h epoll_manager.h etcd_state_client.h fio/fio.h fio/optgroup.h http_client.h json11/json11.hpp messenger.h object_id.h osd_id.h osd_ops.h ringloop.h timerfd_manager.h
+	g++ $(CXXFLAGS) -c -o $@ $<
+fio_engine.o: fio_engine.cpp blockstore.h fio/fio.h fio/optgroup.h json11/json11.hpp object_id.h ringloop.h
+	g++ $(CXXFLAGS) -c -o $@ $<
+fio_sec_osd.o: fio_sec_osd.cpp fio/fio.h fio/optgroup.h object_id.h osd_id.h osd_ops.h rw_blocking.h
+	g++ $(CXXFLAGS) -c -o $@ $<
+http_client.o: http_client.cpp http_client.h json11/json11.hpp timerfd_manager.h
+	g++ $(CXXFLAGS) -c -o $@ $<
+messenger.o: messenger.cpp json11/json11.hpp messenger.h object_id.h osd_id.h osd_ops.h ringloop.h timerfd_manager.h
+	g++ $(CXXFLAGS) -c -o $@ $<
+msgr_receive.o: msgr_receive.cpp json11/json11.hpp messenger.h object_id.h osd_id.h osd_ops.h ringloop.h timerfd_manager.h
+	g++ $(CXXFLAGS) -c -o $@ $<
+msgr_send.o: msgr_send.cpp json11/json11.hpp messenger.h object_id.h osd_id.h osd_ops.h ringloop.h timerfd_manager.h
+	g++ $(CXXFLAGS) -c -o $@ $<
+osd.o: osd.cpp blockstore.h cpp-btree/btree_map.h etcd_state_client.h http_client.h json11/json11.hpp messenger.h object_id.h osd.h osd_id.h osd_ops.h osd_peering_pg.h pg_states.h ringloop.h timerfd_manager.h
+	g++ $(CXXFLAGS) -c -o $@ $<
+osd_cluster.o: osd_cluster.cpp base64.h blockstore.h cpp-btree/btree_map.h etcd_state_client.h http_client.h json11/json11.hpp messenger.h object_id.h osd.h osd_id.h osd_ops.h osd_peering_pg.h pg_states.h ringloop.h timerfd_manager.h
+	g++ $(CXXFLAGS) -c -o $@ $<
+osd_flush.o: osd_flush.cpp blockstore.h cpp-btree/btree_map.h etcd_state_client.h http_client.h json11/json11.hpp messenger.h object_id.h osd.h osd_id.h osd_ops.h osd_peering_pg.h pg_states.h ringloop.h timerfd_manager.h
+	g++ $(CXXFLAGS) -c -o $@ $<
+osd_main.o: osd_main.cpp blockstore.h cpp-btree/btree_map.h etcd_state_client.h http_client.h json11/json11.hpp messenger.h object_id.h osd.h osd_id.h osd_ops.h osd_peering_pg.h pg_states.h ringloop.h timerfd_manager.h
+	g++ $(CXXFLAGS) -c -o $@ $<
+osd_peering.o: osd_peering.cpp base64.h blockstore.h cpp-btree/btree_map.h etcd_state_client.h http_client.h json11/json11.hpp messenger.h object_id.h osd.h osd_id.h osd_ops.h osd_peering_pg.h pg_states.h ringloop.h timerfd_manager.h
+	g++ $(CXXFLAGS) -c -o $@ $<
+osd_peering_pg.o: osd_peering_pg.cpp cpp-btree/btree_map.h object_id.h osd_id.h osd_ops.h osd_peering_pg.h pg_states.h
+	g++ $(CXXFLAGS) -c -o $@ $<
+osd_peering_pg_test.o: osd_peering_pg_test.cpp cpp-btree/btree_map.h object_id.h osd_id.h osd_ops.h osd_peering_pg.h pg_states.h
+	g++ $(CXXFLAGS) -c -o $@ $<
+osd_primary.o: osd_primary.cpp blockstore.h cpp-btree/btree_map.h etcd_state_client.h http_client.h json11/json11.hpp messenger.h object_id.h osd.h osd_id.h osd_ops.h osd_peering_pg.h osd_primary.h osd_rmw.h pg_states.h ringloop.h timerfd_manager.h
+	g++ $(CXXFLAGS) -c -o $@ $<
+osd_primary_subops.o: osd_primary_subops.cpp blockstore.h cpp-btree/btree_map.h etcd_state_client.h http_client.h json11/json11.hpp messenger.h object_id.h osd.h osd_id.h osd_ops.h osd_peering_pg.h osd_primary.h osd_rmw.h pg_states.h ringloop.h timerfd_manager.h
+	g++ $(CXXFLAGS) -c -o $@ $<
+osd_rmw.o: osd_rmw.cpp object_id.h osd_id.h osd_rmw.h xor.h
+	g++ $(CXXFLAGS) -c -o $@ $<
+osd_rmw_test.o: osd_rmw_test.cpp object_id.h osd_id.h osd_rmw.cpp osd_rmw.h test_pattern.h xor.h
+	g++ $(CXXFLAGS) -c -o $@ $<
+osd_secondary.o: osd_secondary.cpp blockstore.h cpp-btree/btree_map.h etcd_state_client.h http_client.h json11/json11.hpp messenger.h object_id.h osd.h osd_id.h osd_ops.h osd_peering_pg.h pg_states.h ringloop.h timerfd_manager.h
+	g++ $(CXXFLAGS) -c -o $@ $<
+osd_test.o: osd_test.cpp object_id.h osd_id.h osd_ops.h rw_blocking.h test_pattern.h
+	g++ $(CXXFLAGS) -c -o $@ $<
+pg_states.o: pg_states.cpp pg_states.h
+	g++ $(CXXFLAGS) -c -o $@ $<
+ringloop.o: ringloop.cpp ringloop.h
+	g++ $(CXXFLAGS) -c -o $@ $<
+rw_blocking.o: rw_blocking.cpp rw_blocking.h
+	g++ $(CXXFLAGS) -c -o $@ $<
+stub_bench.o: stub_bench.cpp object_id.h osd_id.h osd_ops.h rw_blocking.h
+	g++ $(CXXFLAGS) -c -o $@ $<
+stub_osd.o: stub_osd.cpp object_id.h osd_id.h osd_ops.h rw_blocking.h
+	g++ $(CXXFLAGS) -c -o $@ $<
+stub_uring_osd.o: stub_uring_osd.cpp epoll_manager.h json11/json11.hpp messenger.h object_id.h osd_id.h osd_ops.h ringloop.h timerfd_manager.h
+	g++ $(CXXFLAGS) -c -o $@ $<
+test.o: test.cpp allocator.h blockstore.h blockstore_flush.h blockstore_impl.h blockstore_init.h blockstore_journal.h cpp-btree/btree_map.h crc32c.h object_id.h osd_id.h osd_ops.h osd_peering_pg.h pg_states.h ringloop.h
+	g++ $(CXXFLAGS) -c -o $@ $<
+test_allocator.o: test_allocator.cpp allocator.h
+	g++ $(CXXFLAGS) -c -o $@ $<
+test_blockstore.o: test_blockstore.cpp blockstore.h object_id.h ringloop.h timerfd_interval.h
+	g++ $(CXXFLAGS) -c -o $@ $<
+timerfd_interval.o: timerfd_interval.cpp ringloop.h timerfd_interval.h
+	g++ $(CXXFLAGS) -c -o $@ $<
+timerfd_manager.o: timerfd_manager.cpp timerfd_manager.h
+	g++ $(CXXFLAGS) -c -o $@ $<

README-ru.md

@@ -1,100 +0,0 @@
-## Vitastor
-
-[Read English version](README.md)
-
-## Идея
-
-Вернём былую скорость кластерному блочному хранилищу!
-
-Vitastor - распределённая блочная SDS (программная СХД), прямой аналог Ceph RBD и
-внутренних СХД популярных облачных провайдеров. Однако, в отличие от них, Vitastor
-быстрый и при этом простой. Только пока маленький :-).
-
-Vitastor архитектурно похож на Ceph, что означает атомарность и 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.
-
-Vitastor нацелен на SSD и SSD+HDD кластеры с как минимум 10 Гбит/с сетью, поддерживает
-TCP и RDMA и на хорошем железе может достигать задержки 4 КБ чтения и записи на уровне ~0.1 мс,
-что примерно в 10 раз быстрее, чем Ceph и другие популярные программные СХД.
-
-Vitastor поддерживает QEMU-драйвер, протоколы NBD и NFS, драйверы OpenStack, Proxmox, Kubernetes.
-Другие драйверы могут также быть легко реализованы.
-
-Подробности смотрите в документации по ссылкам ниже.
-
-## Презентации и записи докладов
-
-- DevOpsConf'2021: презентация ([на русском](https://vitastor.io/presentation/devopsconf/devopsconf.html),
-  [на английском](https://vitastor.io/presentation/devopsconf/devopsconf_en.html)),
-  [видео](https://vitastor.io/presentation/devopsconf/talk.webm)
-- Highload'2022: презентация ([на русском](https://vitastor.io/presentation/highload/highload.html)),
-  [видео](https://vitastor.io/presentation/highload/talk.webm)
-
-## Документация
-
-- Введение
-  - [Быстрый старт](docs/intro/quickstart.ru.md)
-  - [Возможности](docs/intro/features.ru.md)
-  - [Архитектура](docs/intro/architecture.ru.md)
-  - [Автор и лицензия](docs/intro/author.ru.md)
-- Установка
-  - [Пакеты](docs/installation/packages.ru.md)
-  - [Proxmox](docs/installation/proxmox.ru.md)
-  - [OpenStack](docs/installation/openstack.ru.md)
-  - [Kubernetes CSI](docs/installation/kubernetes.ru.md)
-  - [Сборка из исходных кодов](docs/installation/source.ru.md)
-- Конфигурация
-  - [Обзор](docs/config.ru.md)
-  - Параметры
-    - [Общие](docs/config/common.ru.md)
-    - [Сетевые](docs/config/network.ru.md)
-    - [Глобальные дисковые параметры](docs/config/layout-cluster.ru.md)
-    - [Дисковые параметры OSD](docs/config/layout-osd.ru.md)
-    - [Прочие параметры OSD](docs/config/osd.ru.md)
-    - [Параметры мониторов](docs/config/monitor.ru.md)
-  - [Настройки пулов](docs/config/pool.ru.md)
-  - [Метаданные образов в etcd](docs/config/inode.ru.md)
-- Использование
-  - [vitastor-cli](docs/usage/cli.ru.md) (консольный интерфейс)
-  - [fio](docs/usage/fio.ru.md) для тестов производительности
-  - [NBD](docs/usage/nbd.ru.md) для монтирования ядром
-  - [QEMU и qemu-img](docs/usage/qemu.ru.md)
-  - [NFS](docs/usage/nfs.ru.md)-прокси для VMWare и подобных
-- Производительность
-  - [Понимание сути производительности](docs/performance/understanding.ru.md)
-  - [Теоретический максимум](docs/performance/theoretical.ru.md)
-  - [Пример сравнения с Ceph](docs/performance/comparison1.ru.md)
-
-## 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).

README.md

@@ -1,100 +0,0 @@
-# Vitastor
-
-[Читать на русском](README-ru.md)
-
-## The Idea
-
-Make Clustered Block Storage Fast Again.
-
-Vitastor is a distributed block SDS, direct replacement of Ceph RBD and internal SDS's
-of public clouds. However, in contrast to them, Vitastor is fast and simple at the same time.
-The only thing is it's slightly young :-).
-
-Vitastor is 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).
-
-Vitastor targets SSD and SSD+HDD clusters with at least 10 Gbit/s network, supports
-TCP and RDMA and may achieve 4 KB read and write latency as low as ~0.1 ms
-with proper hardware which is ~10 times faster than other popular SDS's like Ceph
-or internal systems of public clouds.
-
-Vitastor supports QEMU, NBD, NFS protocols, OpenStack, Proxmox, Kubernetes drivers.
-More drivers may be created easily.
-
-Read more details below in the documentation.
-
-## Talks and presentations
-
-- DevOpsConf'2021: presentation ([in Russian](https://vitastor.io/presentation/devopsconf/devopsconf.html),
-  [in English](https://vitastor.io/presentation/devopsconf/devopsconf_en.html)),
-  [video](https://vitastor.io/presentation/devopsconf/talk.webm)
-- Highload'2022: presentation ([in Russian](https://vitastor.io/presentation/highload/highload.html)),
-  [video](https://vitastor.io/presentation/highload/talk.webm)
-
-## Documentation
-
-- Introduction
-  - [Quick Start](docs/intro/quickstart.en.md)
-  - [Features](docs/intro/features.en.md)
-  - [Architecture](docs/intro/architecture.en.md)
-  - [Author and license](docs/intro/author.en.md)
-- Installation
-  - [Packages](docs/installation/packages.en.md)
-  - [Proxmox](docs/installation/proxmox.en.md)
-  - [OpenStack](docs/installation/openstack.en.md)
-  - [Kubernetes CSI](docs/installation/kubernetes.en.md)
-  - [Building from Source](docs/installation/source.en.md)
-- Configuration
-  - [Overview](docs/config.en.md)
-  - Parameter Reference
-    - [Common](docs/config/common.en.md)
-    - [Network](docs/config/network.en.md)
-    - [Global Disk Layout](docs/config/layout-cluster.en.md)
-    - [OSD Disk Layout](docs/config/layout-osd.en.md)
-    - [OSD Runtime Parameters](docs/config/osd.en.md)
-    - [Monitor](docs/config/monitor.en.md)
-  - [Pool configuration](docs/config/pool.en.md)
-  - [Image metadata in etcd](docs/config/inode.en.md)
-- Usage
-  - [vitastor-cli](docs/usage/cli.en.md) (command-line interface)
-  - [fio](docs/usage/fio.en.md) for benchmarks
-  - [NBD](docs/usage/nbd.en.md) for kernel mounts
-  - [QEMU and qemu-img](docs/usage/qemu.en.md)
-  - [NFS](docs/usage/nfs.en.md) emulator for VMWare and similar
-- Performance
-  - [Understanding storage performance](docs/performance/understanding.en.md)
-  - [Theoretical performance](docs/performance/theoretical.en.md)
-  - [Example comparison with Ceph](docs/performance/comparison1.en.md)
-
-## 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).

VNPL-1.1.txt

@@ -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
-ensure that, in such cases, the modified program and the proxy stays
-available to the community. It requires the operator of a network server to
-provide the source code of the original program and all other programs
-communicating with it running there to the users of that server.
-Therefore, public use of a modified version, on a server accessible
-directly or indirectly to the public, gives the public access to the source
-code of the modified version.
-
-  The precise terms and conditions for copying, distribution and
-modification follow.
-
-                       TERMS AND CONDITIONS
-
-  0. Definitions.
-
-  "This License" refers to version 1 of the Vitastor Network Public License.
-
-  "Copyright" also means copyright-like laws that apply to other kinds of
-works, such as semiconductor masks.
-
-  "The Program" refers to any copyrightable work licensed under this
-License.  Each licensee is addressed as "you".  "Licensees" and
-"recipients" may be individuals or organizations.
-
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allocator.cpp

@@ -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
-        : (((uint64_t)1 << (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)
@@ -79,7 +61,7 @@ void allocator::set(uint64_t addr, bool value)
             }
             if (value)
             {
-                mask[last] = mask[last] | ((uint64_t)1 << bit);
+                mask[last] = mask[last] | (1l << bit);
                 if (mask[last] != (!is_last || cur_addr/64 < size/64
                     ? UINT64_MAX : last_one_mask))
                 {
@@ -88,7 +70,7 @@ void allocator::set(uint64_t addr, bool value)
             }
             else
             {
-                mask[last] = mask[last] & ~((uint64_t)1 << bit);
+                mask[last] = mask[last] & ~(1l << bit);
             }
             is_last = false;
             if (p2 > 1)
@@ -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++;
-        }
-    }
-}

allocator.h

@@ -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);

base64.cpp

@@ -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)

base64.h

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

blockstore.cpp

@@ -0,0 +1,66 @@
+#include "blockstore_impl.h"
+
+blockstore_t::blockstore_t(blockstore_config_t & config, ring_loop_t *ringloop)
+{
+    impl = new blockstore_impl_t(config, ringloop);
+}
+
+blockstore_t::~blockstore_t()
+{
+    delete impl;
+}
+
+void blockstore_t::loop()
+{
+    impl->loop();
+}
+
+bool blockstore_t::is_started()
+{
+    return impl->is_started();
+}
+
+bool blockstore_t::is_stalled()
+{
+    return impl->is_stalled();
+}
+
+bool blockstore_t::is_safe_to_stop()
+{
+    return impl->is_safe_to_stop();
+}
+
+void blockstore_t::enqueue_op(blockstore_op_t *op)
+{
+    impl->enqueue_op(op, false);
+}
+
+void blockstore_t::enqueue_op_first(blockstore_op_t *op)
+{
+    impl->enqueue_op(op, true);
+}
+
+std::unordered_map<object_id, uint64_t> & blockstore_t::get_unstable_writes()
+{
+    return impl->unstable_writes;
+}
+
+uint32_t blockstore_t::get_block_size()
+{
+    return impl->get_block_size();
+}
+
+uint64_t blockstore_t::get_block_count()
+{
+    return impl->get_block_count();
+}
+
+uint64_t blockstore_t::get_free_block_count()
+{
+    return impl->get_free_block_count();
+}
+
+uint32_t blockstore_t::get_disk_alignment()
+{
+    return impl->get_disk_alignment();
+}

blockstore.h

@@ -1,6 +1,3 @@
-// Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.1 (see README.md for details)
-
 #pragma once
 
 #ifndef _LARGEFILE64_SOURCE
@@ -9,38 +6,34 @@
 
 #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
 #ifndef MEM_ALIGNMENT
-#define MEM_ALIGNMENT 4096
+#define MEM_ALIGNMENT 512
 #endif
 
 // Default block size is 128 KB, current allowed range is 4K - 128M
 #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
@@ -180,21 +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();
-
-    // Print diagnostics to stdout
-    void dump_diagnostics();
+    // 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();
 
-    uint64_t get_journal_size();
-
-    uint32_t get_bitmap_granularity();
+    uint32_t get_disk_alignment();
 };

blockstore_flush.cpp

@@ -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++)
+    journal_trim_interval = flusher_start_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;
@@ -42,6 +33,12 @@ journal_flusher_co::journal_flusher_co()
             );
         }
         wait_count--;
+        if (!wait_count)
+        {
+            timespec now;
+            clock_gettime(CLOCK_REALTIME, &now);
+            printf("finished %s %d %ld.%06ld\n", __FILE__, __LINE__, now.tv_sec, now.tv_nsec/1000);
+        }
     };
     simple_callback_w = [this](ring_data_t* data)
     {
@@ -54,6 +51,12 @@ journal_flusher_co::journal_flusher_co()
             );
         }
         wait_count--;
+        if (!wait_count)
+        {
+            timespec now;
+            clock_gettime(CLOCK_REALTIME, &now);
+            printf("finished %s %d %ld.%06ld\n", __FILE__, __LINE__, now.tv_sec, now.tv_nsec/1000);
+        }
     };
 }
 
@@ -71,31 +74,14 @@ 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 +93,15 @@ 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() >= flusher_start_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())
     {
@@ -128,38 +111,15 @@ 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() >= flusher_start_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()
 {
     dequeuing = true;
@@ -167,92 +127,18 @@ void journal_flusher_t::request_trim()
     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--;
 }
 
-void journal_flusher_t::dump_diagnostics()
-{
-    const char *unflushable_type = "";
-    obj_ver_id unflushable = {};
-    // Try to find out if there is a flushable object for information
-    for (object_id cur_oid: flush_queue)
-    {
-        obj_ver_id cur = { .oid = cur_oid, .version = flush_versions[cur_oid] };
-        auto dirty_end = bs->dirty_db.find(cur);
-        if (dirty_end == bs->dirty_db.end())
-        {
-            // Already flushed
-            continue;
-        }
-        auto repeat_it = sync_to_repeat.find(cur.oid);
-        if (repeat_it != sync_to_repeat.end())
-        {
-            // Someone is already flushing it
-            unflushable_type = "locked,";
-            unflushable = cur;
-            break;
-        }
-        if (dirty_end->second.journal_sector >= bs->journal.dirty_start &&
-            (bs->journal.dirty_start >= bs->journal.used_start ||
-            dirty_end->second.journal_sector < bs->journal.used_start))
-        {
-            // Object is more recent than possible to flush
-            bool found = try_find_older(dirty_end, cur);
-            if (!found)
-            {
-                unflushable_type = "dirty,";
-                unflushable = cur;
-                break;
-            }
-        }
-        unflushable_type = "ok,";
-        unflushable = cur;
-        break;
-    }
-    printf(
-        "Flusher: queued=%ld first=%s%lx:%lx trim_wanted=%d dequeuing=%d trimming=%d cur=%d target=%d active=%d syncing=%d\n",
-        flush_queue.size(), unflushable_type, unflushable.oid.inode, unflushable.oid.stripe,
-        trim_wanted, dequeuing, trimming, cur_flusher_count, target_flusher_count,
-        active_flushers, syncing_flushers
-    );
-}
-
-bool journal_flusher_t::try_find_older(std::map<obj_ver_id, dirty_entry>::iterator & dirty_end, obj_ver_id & cur)
-{
-    bool found = false;
-    while (dirty_end != bs->dirty_db.begin())
-    {
-        dirty_end--;
-        if (dirty_end->first.oid != cur.oid)
-        {
-            break;
-        }
-        if (!(dirty_end->second.journal_sector >= bs->journal.dirty_start &&
-            (bs->journal.dirty_start >= bs->journal.used_start ||
-            dirty_end->second.journal_sector < bs->journal.used_start)))
-        {
-            found = true;
-            cur.version = dirty_end->first.version;
-            break;
-        }
-    }
-    return found;
-}
-
 #define await_sqe(label) \
     resume_##label:\
+        {\
+            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)\
         {\
@@ -300,23 +186,9 @@ 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;
@@ -328,23 +200,6 @@ stop_flusher:
     dirty_end = bs->dirty_db.find(cur);
     if (dirty_end != bs->dirty_db.end())
     {
-        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);
-#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
-            // In that case we set sync_to_repeat and pick another object
-            // Another coroutine will see it and re-queue the object after it finishes
-            if (repeat_it->second < cur.version)
-                repeat_it->second = cur.version;
-            wait_state = 0;
-            goto resume_0;
-        }
-        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))
@@ -355,15 +210,29 @@ stop_flusher:
             // And it may even block writes if we don't flush the older version
             // (if it's in the beginning of the journal)...
             // So first try to find an older version of the same object to flush.
-            bool found = flusher->try_find_older(dirty_end, cur);
+            bool found = false;
+            while (dirty_end != bs->dirty_db.begin())
+            {
+                dirty_end--;
+                if (dirty_end->first.oid != cur.oid)
+                {
+                    break;
+                }
+                if (!(dirty_end->second.journal_sector >= bs->journal.dirty_start &&
+                    (bs->journal.dirty_start >= bs->journal.used_start ||
+                    dirty_end->second.journal_sector < bs->journal.used_start)))
+                {
+                    found = true;
+                    cur.version = dirty_end->first.version;
+                    break;
+                }
+            }
             if (!found)
             {
                 // Try other objects
-                flusher->sync_to_repeat.erase(cur.oid);
                 int search_left = flusher->flush_queue.size() - 1;
 #ifdef BLOCKSTORE_DEBUG
-                printf("Flusher overran writers (%lx:%lx v%lu, dirty_start=%08lx) - searching for older flushes (%d left)\n",
-                    cur.oid.inode, cur.oid.stripe, cur.version, bs->journal.dirty_start, search_left);
+                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)
                 {
@@ -379,23 +248,13 @@ stop_flusher:
                             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);
+                            printf("Write %lu:%lu 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())
-                            {
-                                if (repeat_it->second < cur.version)
-                                    repeat_it->second = cur.version;
-                            }
-                            else
-                            {
-                                flusher->sync_to_repeat[cur.oid] = 0;
-                                break;
-                            }
+                            break;
                         }
                     }
                     search_left--;
@@ -405,21 +264,37 @@ stop_flusher:
 #ifdef BLOCKSTORE_DEBUG
                     printf("No older flushes, stopping\n");
 #endif
-                    goto stop_flusher;
+                    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("Flushing %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
+            // In that case we set sync_to_repeat and pick another object
+            // Another coroutine will see it and re-queue the object after it finishes
+            if (repeat_it->second < cur.version)
+                repeat_it->second = cur.version;
+            wait_state = 0;
+            goto resume_0;
+        }
+        else
+            flusher->sync_to_repeat[cur.oid] = 0;
+#ifdef BLOCKSTORE_DEBUG
+        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
-        {
-            auto & clean_db = bs->clean_db_shard(cur.oid);
-            auto clean_it = clean_db.find(cur.oid);
-            old_clean_loc = (clean_it != clean_db.end() ? clean_it->second.location : UINT64_MAX);
-        }
+        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))
         {
@@ -427,12 +302,12 @@ resume_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)
+        assert(!(copy_count > 0 || has_writes) || !has_delete);
+        if (copy_count == 0 && !has_writes && !has_delete || has_delete && old_clean_loc == UINT64_MAX)
         {
             // Nothing to flush
             bs->erase_dirty(dirty_start, std::next(dirty_end), clean_loc);
-            goto release_oid;
+            goto trim_journal;
         }
         if (clean_loc == UINT64_MAX)
         {
@@ -441,7 +316,7 @@ resume_1:
                 // 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);
@@ -489,19 +364,19 @@ resume_1:
         if (bs->clean_entry_bitmap_size)
         {
             new_clean_bitmap = (bs->inmemory_meta
-                ? (uint8_t*)meta_new.buf + meta_new.pos*bs->clean_entry_size + sizeof(clean_disk_entry)
-                : (uint8_t*)bs->clean_bitmap + (clean_loc >> bs->block_order)*(2*bs->clean_entry_bitmap_size));
+                ? meta_new.buf + meta_new.pos*bs->clean_entry_size + sizeof(clean_disk_entry)
+                : 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 };
@@ -535,8 +410,7 @@ resume_1:
                 wait_state = 5;
                 return false;
             }
-            // zero out old metadata entry
-            memset((uint8_t*)meta_old.buf + meta_old.pos*bs->clean_entry_size, 0, bs->clean_entry_size);
+            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 };
             data->callback = simple_callback_w;
@@ -547,39 +421,18 @@ resume_1:
         }
         if (has_delete)
         {
-            clean_disk_entry *new_entry = (clean_disk_entry*)((uint8_t*)meta_new.buf + meta_new.pos*bs->clean_entry_size);
-            if (new_entry->oid.inode != 0 && new_entry->oid != cur.oid)
-            {
-                printf("Fatal error (metadata corruption or bug): tried to delete metadata entry %lu (%lx:%lx v%lu) while deleting %lx:%lx\n",
-                    clean_loc >> bs->block_order, new_entry->oid.inode, new_entry->oid.stripe,
-                    new_entry->version, cur.oid.inode, cur.oid.stripe);
-                exit(1);
-            }
-            // zero out new metadata entry
-            memset((uint8_t*)meta_new.buf + meta_new.pos*bs->clean_entry_size, 0, bs->clean_entry_size);
+            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*)((uint8_t*)meta_new.buf + meta_new.pos*bs->clean_entry_size);
-            if (new_entry->oid.inode != 0 && new_entry->oid != cur.oid)
-            {
-                printf("Fatal error (metadata corruption or bug): tried to overwrite non-zero metadata entry %lu (%lx:%lx v%lu) with %lx:%lx v%lu\n",
-                    clean_loc >> bs->block_order, new_entry->oid.inode, new_entry->oid.stripe, new_entry->version,
-                    cur.oid.inode, cur.oid.stripe, cur.version);
-                exit(1);
-            }
+            clean_disk_entry *new_entry = (clean_disk_entry*)(meta_new.buf + meta_new.pos*bs->clean_entry_size);
+            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((uint8_t*)(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 };
@@ -629,35 +482,14 @@ 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)
         {
             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,
@@ -665,8 +497,7 @@ 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 };
@@ -679,34 +510,20 @@ 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 (%ld left)\n", cur.oid.inode, cur.oid.stripe, cur.version, flusher->flush_queue.size());
+#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;
     }
@@ -730,16 +547,7 @@ bool journal_flusher_co::scan_dirty(int wait_base)
     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;
@@ -748,30 +556,27 @@ bool journal_flusher_co::scan_dirty(int wait_base)
                 offset = dirty_it->second.offset;
                 end_offset = dirty_it->second.offset + dirty_it->second.len;
                 it = v.begin();
-                while (end_offset > offset)
+                while (1)
                 {
                     for (; it != v.end(); it++)
-                        if (it->offset+it->len > offset)
+                        if (it->offset >= offset)
                             break;
-                    // If all items end before offset or if the found item starts after end_offset, just insert the buffer
-                    // If (offset < it->offset < end_offset) insert (offset..it->offset) part
-                    // If (it->offset <= offset <= it->offset+it->len) then just skip to it->offset+it->len
-                    if (it == v.end() || it->offset > offset)
+                    if (it == v.end() || it->offset > offset && it->len > 0)
                     {
                         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, (uint8_t*)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
@@ -780,12 +585,12 @@ bool journal_flusher_co::scan_dirty(int wait_base)
                         }
                     }
                     offset = it->offset+it->len;
-                    if (it == v.end())
+                    if (it == v.end() || offset >= end_offset)
                         break;
                 }
             }
         }
-        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;
@@ -795,12 +600,21 @@ bool journal_flusher_co::scan_dirty(int wait_base)
             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())
         {
@@ -829,14 +643,14 @@ bool journal_flusher_co::modify_meta_read(uint64_t meta_loc, flusher_meta_write_
     wr.pos = ((meta_loc >> bs->block_order) % (bs->meta_block_size / bs->clean_entry_size));
     if (bs->inmemory_meta)
     {
-        wr.buf = (uint8_t*)bs->metadata_buffer + wr.sector;
+        wr.buf = bs->metadata_buffer + wr.sector;
         return true;
     }
     wr.it = flusher->meta_sectors.find(wr.sector);
     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,
@@ -866,29 +680,20 @@ 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);
     }
-    auto & clean_db = bs->clean_db_shard(cur.oid);
     if (has_delete)
     {
-        auto clean_it = clean_db.find(cur.oid);
-        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
+        auto clean_it = bs->clean_db.find(cur.oid);
+        bs->clean_db.erase(clean_it);
         bs->data_alloc->set(clean_loc >> bs->block_order, false);
         clean_loc = UINT64_MAX;
     }
     else
     {
-        clean_db[cur.oid] = {
+        bs->clean_db[cur.oid] = {
             .version = cur.version,
             .location = clean_loc,
         };
@@ -904,7 +709,7 @@ 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())
@@ -923,34 +728,31 @@ 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->flusher_count || !flusher->flush_queue.size())
         {
-            if (flusher->syncing_flushers >= flusher->cur_flusher_count || !flusher->flush_queue.size())
+            // Sync batch is ready. Do it.
+            await_sqe(0);
+            data->iov = { 0 };
+            data->callback = simple_callback_w;
+            my_uring_prep_fsync(sqe, fsync_meta ? bs->meta_fd : bs->data_fd, IORING_FSYNC_DATASYNC);
+            cur_sync->state = 1;
+            wait_count++;
+        resume_1:
+            if (wait_count > 0)
             {
-                // Sync batch is ready. Do it.
-                await_sqe(0);
-                data->iov = { 0 };
-                data->callback = simple_callback_w;
-                my_uring_prep_fsync(sqe, fsync_meta ? bs->meta_fd : bs->data_fd, IORING_FSYNC_DATASYNC);
-                cur_sync->state = 1;
-                wait_count++;
-            resume_2:
-                if (wait_count > 0)
-                {
-                    wait_state = 2;
-                    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;
                 return false;
             }
+            // Sync completed. All previous coroutines waiting for it must be resumed
+            cur_sync->state = 2;
+            bs->ringloop->wakeup();
+        }
+        // Wait until someone else sends and completes a sync.
+    resume_2:
+        if (!cur_sync->state)
+        {
+            wait_state = 2;
+            return false;
         }
         flusher->syncing_flushers--;
         cur_sync->ready_count--;
@@ -961,3 +763,35 @@ 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++;
+        }
+    }
+}

blockstore_flush.h

@@ -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;
@@ -49,6 +46,7 @@ class journal_flusher_co
     std::function<void(ring_data_t*)> simple_callback_r, simple_callback_w;
 
     bool skip_copy, has_delete, has_writes;
+    blockstore_clean_db_t::iterator clean_it;
     std::vector<copy_buffer_t> v;
     std::vector<copy_buffer_t>::iterator it;
     int copy_count;
@@ -58,8 +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;
 
@@ -68,6 +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();
@@ -78,14 +75,13 @@ 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_count;
     int flusher_start_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;
@@ -96,19 +92,13 @@ class journal_flusher_t
     std::map<uint64_t, meta_sector_t> meta_sectors;
     std::deque<object_id> flush_queue;
     std::map<object_id, uint64_t> flush_versions;
-
-    bool try_find_older(std::map<obj_ver_id, dirty_entry>::iterator & dirty_end, obj_ver_id & cur);
-
 public:
-    journal_flusher_t(blockstore_impl_t *bs);
+    journal_flusher_t(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 enqueue_flush(obj_ver_id oid);
-    void unshift_flush(obj_ver_id oid, bool force);
-    void remove_flush(object_id oid);
-    void dump_diagnostics();
+    void unshift_flush(obj_ver_id oid);
 };

blockstore_impl.cpp

@@ -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()
@@ -93,36 +89,35 @@ void blockstore_impl_t::loop()
             {
                 delete journal_init_reader;
                 journal_init_reader = NULL;
-                if (journal.flush_journal)
-                    initialized = 3;
-                else
-                    initialized = 10;
+                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, done_lists = 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
@@ -135,41 +130,39 @@ void blockstore_impl_t::loop()
                 }
                 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;
                     }
                     continue;
                 }
             }
+            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)
             {
                 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;
+                dequeue_op = dequeue_write(op);
+                has_writes = dequeue_op ? 1 : 2;
             }
             else if (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_del(op);
-                has_writes = wr_st > 0 ? 1 : 2;
+                dequeue_op = dequeue_del(op);
+                has_writes = dequeue_op ? 1 : 2;
             }
             else if (op->opcode == BS_OP_SYNC)
             {
@@ -182,53 +175,53 @@ 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 have to be blocked by previous modifications
-                // But don't do a lot of LISTs at once, because they're blocking and potentially slow
-                if (single_tick_list_limit <= 0 || done_lists < single_tick_list_limit)
+                // 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
                 {
                     process_list(op);
-                    done_lists++;
-                    wr_st = 2;
+                    dequeue_op = true;
                 }
             }
-            if (wr_st == 2)
+            if (dequeue_op)
             {
-                new_idx--;
+                submit_queue.erase(op_ptr);
             }
-            if (wr_st == 0)
+            else
             {
                 ringloop->restore(prev_sqe_pos);
                 if (PRIV(op)->wait_for == WAIT_SQE)
                 {
+                    PRIV(op)->wait_detail = 1 + ring_space;
                     // ring is full, stop submission
                     break;
                 }
             }
         }
-        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();
@@ -238,12 +231,6 @@ void blockstore_impl_t::loop()
         {
             throw std::runtime_error(std::string("io_uring_submit: ") + strerror(-ret));
         }
-        for (auto s: journal.submitting_sectors)
-        {
-            // Mark journal sector writes as submitted
-            journal.sector_info[s].submit_id = 0;
-        }
-        journal.submitting_sectors.clear();
         if ((initial_ring_space - ringloop->space_left()) > 0)
         {
             live = true;
@@ -257,7 +244,7 @@ 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;
     }
@@ -285,7 +272,7 @@ void blockstore_impl_t::check_wait(blockstore_op_t *op)
 {
     if (PRIV(op)->wait_for == WAIT_SQE)
     {
-        if (ringloop->sqes_left() < PRIV(op)->wait_detail)
+        if (ringloop->space_left() < PRIV(op)->wait_detail)
         {
             // stop submission if there's still no free space
 #ifdef BLOCKSTORE_DEBUG
@@ -311,7 +298,7 @@ void blockstore_impl_t::check_wait(blockstore_op_t *op)
     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
@@ -324,7 +311,7 @@ void blockstore_impl_t::check_wait(blockstore_op_t *op)
     }
     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");
@@ -339,15 +326,16 @@ 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;
@@ -375,7 +363,7 @@ void blockstore_impl_t::enqueue_op(blockstore_op_t *op)
                     };
                 }
                 unstable_writes.clear();
-                op->callback = [old_callback](blockstore_op_t *op)
+                op->callback = [this, old_callback](blockstore_op_t *op)
                 {
                     obj_ver_id *vers = (obj_ver_id*)op->buf;
                     delete[] vers;
@@ -392,17 +380,30 @@ 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 || op->opcode == BS_OP_DELETE) && !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;
-    submit_queue.push_back(op);
+    if (!first)
+    {
+        submit_queue.push_back(op);
+    }
+    else
+    {
+        submit_queue.push_front(op);
+    }
     ringloop->wakeup();
 }
 
@@ -428,104 +429,20 @@ static bool replace_stable(object_id oid, uint64_t version, int search_start, in
     return false;
 }
 
-blockstore_clean_db_t& blockstore_impl_t::clean_db_shard(object_id oid)
-{
-    uint64_t pg_num = 0;
-    uint64_t pool_id = (oid.inode >> (64-POOL_ID_BITS));
-    auto sh_it = clean_db_settings.find(pool_id);
-    if (sh_it != clean_db_settings.end())
-    {
-        // like map_to_pg()
-        pg_num = (oid.stripe / sh_it->second.pg_stripe_size) % sh_it->second.pg_count + 1;
-    }
-    return clean_db_shards[(pool_id << (64-POOL_ID_BITS)) | pg_num];
-}
-
-void blockstore_impl_t::reshard_clean_db(pool_id_t pool, uint32_t pg_count, uint32_t pg_stripe_size)
-{
-    uint64_t pool_id = (uint64_t)pool;
-    std::map<pool_pg_id_t, blockstore_clean_db_t> new_shards;
-    auto sh_it = clean_db_shards.lower_bound((pool_id << (64-POOL_ID_BITS)));
-    while (sh_it != clean_db_shards.end() &&
-        (sh_it->first >> (64-POOL_ID_BITS)) == pool_id)
-    {
-        for (auto & pair: sh_it->second)
-        {
-            // like map_to_pg()
-            uint64_t pg_num = (pair.first.stripe / pg_stripe_size) % pg_count + 1;
-            uint64_t shard_id = (pool_id << (64-POOL_ID_BITS)) | pg_num;
-            new_shards[shard_id][pair.first] = pair.second;
-        }
-        clean_db_shards.erase(sh_it++);
-    }
-    for (sh_it = new_shards.begin(); sh_it != new_shards.end(); sh_it++)
-    {
-        auto & to = clean_db_shards[sh_it->first];
-        to.swap(sh_it->second);
-    }
-    clean_db_settings[pool_id] = (pool_shard_settings_t){
-        .pg_count = pg_count,
-        .pg_stripe_size = pg_stripe_size,
-    };
-}
-
 void blockstore_impl_t::process_list(blockstore_op_t *op)
 {
-    uint32_t list_pg = op->offset+1;
+    // Check PG
+    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))
+    if (pg_count != 0 && (pg_stripe_size < MIN_BLOCK_SIZE || list_pg >= pg_count))
     {
         op->retval = -EINVAL;
         FINISH_OP(op);
         return;
     }
-    // Check if the DB needs resharding
-    // (we don't know about PGs from the beginning, we only create "shards" here)
-    uint64_t first_shard = 0, last_shard = UINT64_MAX;
-    if (min_inode != 0 &&
-        // Check if min_inode == max_inode == pool_id<<N, i.e. this is a pool listing
-        (min_inode >> (64-POOL_ID_BITS)) == (max_inode >> (64-POOL_ID_BITS)))
-    {
-        pool_id_t pool_id = (min_inode >> (64-POOL_ID_BITS));
-        if (pg_count > 1)
-        {
-            // Per-pg listing
-            auto sh_it = clean_db_settings.find(pool_id);
-            if (sh_it == clean_db_settings.end() ||
-                sh_it->second.pg_count != pg_count ||
-                sh_it->second.pg_stripe_size != pg_stripe_size)
-            {
-                reshard_clean_db(pool_id, pg_count, pg_stripe_size);
-            }
-            first_shard = last_shard = ((uint64_t)pool_id << (64-POOL_ID_BITS)) | list_pg;
-        }
-        else
-        {
-            // Per-pool listing
-            first_shard = ((uint64_t)pool_id << (64-POOL_ID_BITS));
-            last_shard = ((uint64_t)(pool_id+1) << (64-POOL_ID_BITS)) - 1;
-        }
-    }
-    // Copy clean_db entries
-    int stable_count = 0, stable_alloc = 0;
-    if (min_inode != max_inode)
-    {
-        for (auto shard_it = clean_db_shards.lower_bound(first_shard);
-            shard_it != clean_db_shards.end() && shard_it->first <= last_shard;
-            shard_it++)
-        {
-            auto & clean_db = shard_it->second;
-            stable_alloc += clean_db.size();
-        }
-    }
-    else
-    {
-        stable_alloc = 32768;
-    }
+    // 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)
     {
@@ -533,28 +450,13 @@ void blockstore_impl_t::process_list(blockstore_op_t *op)
         FINISH_OP(op);
         return;
     }
-    for (auto shard_it = clean_db_shards.lower_bound(first_shard);
-        shard_it != clean_db_shards.end() && shard_it->first <= last_shard;
-        shard_it++)
+    for (auto it = clean_db.begin(); it != clean_db.end(); it++)
     {
-        auto & clean_db = shard_it->second;
-        auto clean_it = clean_db.begin(), clean_end = clean_db.end();
-        if ((min_inode != 0 || max_inode != 0) && min_inode <= max_inode)
-        {
-            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 || ((it->first.inode + it->first.stripe / pg_stripe_size) % pg_count) == list_pg)
         {
             if (stable_count >= stable_alloc)
             {
-                stable_alloc *= 2;
+                stable_alloc += 32768;
                 stable = (obj_ver_id*)realloc(stable, sizeof(obj_ver_id) * stable_alloc);
                 if (!stable)
                 {
@@ -564,97 +466,72 @@ void blockstore_impl_t::process_list(blockstore_op_t *op)
                 }
             }
             stable[stable_count++] = {
-                .oid = clean_it->first,
-                .version = clean_it->second.version,
+                .oid = it->first,
+                .version = it->second.version,
             };
         }
     }
-    if (first_shard != last_shard)
-    {
-        // If that's not a per-PG listing, sort clean entries
-        std::sort(stable, stable+stable_count);
-    }
     int clean_stable_count = stable_count;
     // Copy dirty_db entries (sorted, too)
     int unstable_count = 0, unstable_alloc = 0;
     obj_ver_id *unstable = NULL;
+    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 (!pg_count || ((dirty_it->first.oid.stripe / pg_stripe_size) % pg_count + 1) == list_pg) // like map_to_pg()
+            if (IS_DELETE(it->second.state))
             {
-                if (IS_DELETE(dirty_it->second.state))
+                // Deletions are always stable, so try to zero out two possible entries
+                if (!replace_stable(it->first.oid, 0, 0, clean_stable_count, stable))
                 {
-                    // 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);
-                    }
+                    replace_stable(it->first.oid, 0, clean_stable_count, stable_count, stable);
                 }
-                else if (IS_STABLE(dirty_it->second.state))
+            }
+            else if (IS_STABLE(it->second.state))
+            {
+                // First try to replace a clean stable version in the first part of the list
+                if (!replace_stable(it->first.oid, it->first.version, 0, clean_stable_count, stable))
                 {
-                    // 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[stable_count-1].oid == it->first.oid)
                     {
-                        // 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 = it->first.version;
+                    }
+                    else
+                    {
+                        if (stable_count >= stable_alloc)
                         {
-                            stable[stable_count-1].version = dirty_it->first.version;
-                        }
-                        else
-                        {
-                            if (stable_count >= stable_alloc)
+                            stable_alloc += 32768;
+                            stable = (obj_ver_id*)realloc(stable, sizeof(obj_ver_id) * stable_alloc);
+                            if (!stable)
                             {
-                                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;
-                                }
+                                if (unstable)
+                                    free(unstable);
+                                op->retval = -ENOMEM;
+                                FINISH_OP(op);
+                                return;
                             }
-                            stable[stable_count++] = dirty_it->first;
                         }
+                        stable[stable_count++] = it->first;
                     }
                 }
-                else
+            }
+            else
+            {
+                if (unstable_count >= unstable_alloc)
                 {
-                    if (unstable_count >= unstable_alloc)
+                    unstable_alloc += 32768;
+                    unstable = (obj_ver_id*)realloc(unstable, sizeof(obj_ver_id) * unstable_alloc);
+                    if (!unstable)
                     {
-                        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;
-                        }
+                        if (stable)
+                            free(stable);
+                        op->retval = -ENOMEM;
+                        FINISH_OP(op);
+                        return;
                     }
-                    unstable[unstable_count++] = dirty_it->first;
                 }
+                unstable[unstable_count++] = it->first;
             }
         }
     }
@@ -692,9 +569,3 @@ void blockstore_impl_t::process_list(blockstore_op_t *op)
     op->buf = stable;
     FINISH_OP(op);
 }
-
-void blockstore_impl_t::dump_diagnostics()
-{
-    journal.dump_diagnostics();
-    flusher->dump_diagnostics();
-}

blockstore_impl.h

@@ -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>
@@ -20,94 +17,81 @@
 
 #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 BS_SUBMIT_CHECK_SQES(n) \
-    if (ringloop->sqes_left() < (n))\
-    {\
-        /* Pause until there are more requests available */\
-        PRIV(op)->wait_detail = (n);\
-        PRIV(op)->wait_for = WAIT_SQE;\
-        return 0;\
-    }
+#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)\
     {\
         /* Pause until there are more requests available */\
-        PRIV(op)->wait_detail = 1;\
         PRIV(op)->wait_for = WAIT_SQE;\
         return 0;\
     }
 
 #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)\
     {\
         /* Pause until there are more requests available */\
-        PRIV(op)->wait_detail = 1;\
         PRIV(op)->wait_for = WAIT_SQE;\
         return 0;\
     }
 
 #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
 {
@@ -123,7 +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;
@@ -132,7 +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!)
@@ -181,17 +164,16 @@ struct blockstore_op_private_t
     std::vector<fulfill_read_t> read_vec;
 
     // Sync, write
-    int min_flushed_journal_sector, max_flushed_journal_sector;
+    uint64_t min_flushed_journal_sector, max_flushed_journal_sector;
 
     // Write
     struct iovec iov_zerofill[3];
-    // 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
@@ -204,17 +186,6 @@ typedef std::map<obj_ver_id, dirty_entry> blockstore_dirty_db_t;
 
 #include "blockstore_flush.h"
 
-typedef uint32_t pool_id_t;
-typedef uint64_t pool_pg_id_t;
-
-#define POOL_ID_BITS 16
-
-struct pool_shard_settings_t
-{
-    uint32_t pg_count;
-    uint32_t pg_stripe_size;
-};
-
 class blockstore_impl_t
 {
     /******* OPTIONS *******/
@@ -240,31 +211,17 @@ 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;
-    // Maximum number of LIST operations to be processed between
-    int single_tick_list_limit = 1;
+    int flusher_count;
     /******* END OF OPTIONS *******/
 
     struct ring_consumer_t ring_consumer;
 
-    std::map<pool_id_t, pool_shard_settings_t> clean_db_settings;
-    std::map<pool_pg_id_t, blockstore_clean_db_t> clean_db_shards;
+    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;
 
@@ -276,17 +233,15 @@ class blockstore_impl_t
     int data_fd;
     uint64_t meta_size, meta_area, meta_len;
     uint64_t data_size, data_len;
-    uint64_t data_device_sect, meta_device_sect, journal_device_sect;
 
     void *metadata_buffer = NULL;
 
     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;
 
@@ -297,7 +252,7 @@ class blockstore_impl_t
 
     friend class blockstore_init_meta;
     friend class blockstore_init_journal;
-    friend struct blockstore_journal_check_t;
+    friend class blockstore_journal_check_t;
     friend class journal_flusher_t;
     friend class journal_flusher_co;
 
@@ -306,14 +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);
-
-    blockstore_clean_db_t& clean_db_shard(object_id oid);
-    void reshard_clean_db(pool_id_t pool_id, uint32_t pg_count, uint32_t pg_stripe_size);
-
-    // Journaling
-    void prepare_journal_sector_write(int sector, blockstore_op_t *op);
-    void handle_journal_write(ring_data_t *data, uint64_t flush_id);
 
     // Asynchronous init
     int initialized;
@@ -333,7 +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);
@@ -341,19 +287,24 @@ 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);
-    void ack_sync(blockstore_op_t *op);
+    int dequeue_sync(blockstore_op_t *op);
+    void handle_sync_event(ring_data_t *data, 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 mark_stable(const obj_ver_id & ov);
+    void handle_stable_event(ring_data_t *data, blockstore_op_t *op);
     void stabilize_object(object_id oid, uint64_t max_ver);
 
     // Rollback
     int dequeue_rollback(blockstore_op_t *op);
     int continue_rollback(blockstore_op_t *op);
     void mark_rolled_back(const obj_ver_id & ov);
+    void handle_rollback_event(ring_data_t *data, blockstore_op_t *op);
     void erase_dirty(blockstore_dirty_db_t::iterator dirty_start, blockstore_dirty_db_t::iterator dirty_end, uint64_t clean_loc);
 
     // List
@@ -361,7 +312,7 @@ 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
@@ -380,23 +331,13 @@ 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;
-
-    // Print diagnostics to stdout
-    void dump_diagnostics();
-
     inline uint32_t get_block_size() { return block_size; }
     inline uint64_t get_block_count() { return block_count; }
     inline uint64_t get_free_block_count() { return data_alloc->get_free_count(); }
-    inline uint32_t get_bitmap_granularity() { return disk_alignment; }
-    inline uint64_t get_journal_size() { return journal.len; }
+    inline uint32_t get_disk_alignment() { return disk_alignment; }
 };

blockstore_init.cpp

@@ -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;
@@ -55,114 +32,30 @@ 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;
-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;
-    bs->meta_len -= 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:
+    resume_1:
         if (submitted)
         {
-            wait_state = 2;
+            wait_state = 1;
             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 = {
-                (uint8_t*)metadata_buffer + (bs->inmemory_meta
+                metadata_buffer + (bs->inmemory_meta
                     ? metadata_read
                     : (prev == 1 ? bs->metadata_buf_size : 0)),
                 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);
-            }
+            my_uring_prep_readv(sqe, bs->meta_fd, &data->iov, 1, bs->meta_offset + metadata_read);
             bs->ringloop->submit();
             submitted = (prev == 1 ? 2 : 1);
             prev = submitted;
@@ -170,13 +63,13 @@ resume_1:
         if (prev_done)
         {
             void *done_buf = bs->inmemory_meta
-                ? ((uint8_t*)metadata_buffer + done_pos)
-                : ((uint8_t*)metadata_buffer + (prev_done == 2 ? bs->metadata_buf_size : 0));
+                ? (metadata_buffer + done_pos)
+                : (metadata_buffer + (prev_done == 2 ? bs->metadata_buf_size : 0));
             unsigned count = bs->meta_block_size / bs->clean_entry_size;
             for (int sector = 0; sector < done_len; sector += bs->meta_block_size)
             {
                 // handle <count> entries
-                handle_entries((uint8_t*)done_buf + sector, count, bs->block_order);
+                handle_entries(done_buf + sector, count, bs->block_order);
                 done_cnt += count;
             }
             prev_done = 0;
@@ -194,21 +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;
 }
 
@@ -216,38 +94,30 @@ void blockstore_init_meta::handle_entries(void* entries, unsigned count, int blo
 {
     for (unsigned i = 0; i < count; i++)
     {
-        clean_disk_entry *entry = (clean_disk_entry*)((uint8_t*)entries + i*bs->clean_entry_size);
+        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)
         {
-            auto & clean_db = bs->clean_db_shard(entry->oid);
-            auto clean_it = clean_db.find(entry->oid);
-            if (clean_it == clean_db.end() || clean_it->second.version < entry->version)
+            auto clean_it = bs->clean_db.find(entry->oid);
+            if (clean_it == bs->clean_db.end() || clean_it->second.version < entry->version)
             {
-                if (clean_it != clean_db.end())
+                if (clean_it != bs->clean_db.end())
                 {
                     // 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);
-                clean_db[entry->oid] = (struct clean_entry){
+                bs->clean_db[entry->oid] = (struct clean_entry){
                     .version = entry->version,
                     .location = (done_cnt+i) << block_order,
                 };
@@ -255,7 +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
             }
         }
@@ -276,6 +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)
@@ -300,6 +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)
@@ -318,7 +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
@@ -337,7 +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)
@@ -352,7 +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)
@@ -403,21 +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)
@@ -440,9 +317,9 @@ 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 = (uint8_t*)bs->journal.buffer + journal_pos;
+                    submitted_buf = bs->journal.buffer + journal_pos;
                 data->iov = {
                     submitted_buf,
                     end - journal_pos < JOURNAL_BUFFER_SIZE ? end - journal_pos : JOURNAL_BUFFER_SIZE,
@@ -523,19 +400,8 @@ 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",
@@ -572,7 +438,7 @@ int blockstore_init_journal::handle_journal_part(void *buf, uint64_t done_pos, u
     resume:
         while (pos < bs->journal.block_size)
         {
-            journal_entry *je = (journal_entry*)((uint8_t*)buf + proc_pos - done_pos + pos);
+            journal_entry *je = (journal_entry*)(buf + proc_pos - done_pos + pos);
             if (je->magic != JOURNAL_MAGIC || je_crc32(je) != je->crc32 ||
                 je->type < JE_MIN || je->type > JE_MAX || started && je->crc32_prev != crc32_last)
             {
@@ -588,15 +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;
@@ -621,7 +482,7 @@ int blockstore_init_journal::handle_journal_part(void *buf, uint64_t done_pos, u
                 if (location >= done_pos && location+je->small_write.len <= done_pos+len)
                 {
                     // data is within this buffer
-                    data_crc32 = crc32c(0, (uint8_t*)buf + location - done_pos, je->small_write.len);
+                    data_crc32 = crc32c(0, buf + location - done_pos, je->small_write.len);
                 }
                 else
                 {
@@ -636,7 +497,7 @@ int blockstore_init_journal::handle_journal_part(void *buf, uint64_t done_pos, u
                                 ? location+je->small_write.len : done[i].pos+done[i].len);
                             uint64_t part_begin = (location < done[i].pos ? done[i].pos : location);
                             covered += part_end - part_begin;
-                            data_crc32 = crc32c(data_crc32, (uint8_t*)done[i].buf + part_begin - done[i].pos, part_end - part_begin);
+                            data_crc32 = crc32c(data_crc32, done[i].buf + part_begin - done[i].pos, part_end - part_begin);
                         }
                     }
                     if (covered < je->small_write.len)
@@ -652,95 +513,46 @@ int blockstore_init_journal::handle_journal_part(void *buf, uint64_t done_pos, u
                     // interesting thing is that we must clear the corrupt entry if we're not readonly,
                     // because we don't write next entries in the same journal block
                     printf("Journal entry data is corrupt (data crc32 %x != %x)\n", data_crc32, je->small_write.crc32_data);
-                    memset((uint8_t*)buf + proc_pos - done_pos + pos, 0, bs->journal.block_size - pos);
+                    memset(buf + proc_pos - done_pos + pos, 0, bs->journal.block_size - pos);
                     bs->journal.next_free = prev_free;
-                    init_write_buf = (uint8_t*)buf + proc_pos - done_pos;
+                    init_write_buf = buf + proc_pos - done_pos;
                     init_write_sector = proc_pos;
                     return 0;
                 }
-                auto & clean_db = bs->clean_db_shard(je->small_write.oid);
-                auto clean_it = clean_db.find(je->small_write.oid);
-                if (clean_it == clean_db.end() ||
+                auto clean_it = bs->clean_db.find(je->small_write.oid);
+                if (clean_it == bs->clean_db.end() ||
                     clean_it->second.version < je->small_write.version)
                 {
                     obj_ver_id ov = {
                         .oid = je->small_write.oid,
                         .version = je->small_write.version,
                     };
-                    void *bmp = NULL;
-                    void *bmp_from = (uint8_t*)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",
+                        "journal offset %08lx is used by %lu:%lu 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_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_db = bs->clean_db_shard(je->big_write.oid);
-                auto clean_it = clean_db.find(je->big_write.oid);
-                if (clean_it == clean_db.end() ||
+                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)
                 {
                     // oid, version, block
@@ -748,80 +560,39 @@ 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 = (uint8_t*)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->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);
+                bs->mark_stable(ov);
             }
             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 = {
@@ -833,29 +604,11 @@ int blockstore_init_journal::handle_journal_part(void *buf, uint64_t done_pos, u
             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_db = bs->clean_db_shard(je->del.oid);
-                auto clean_it = clean_db.find(je->del.oid);
-                bool clean_exists = (clean_it != 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)
+                auto clean_it = bs->clean_db.find(je->del.oid);
+                if (clean_it == bs->clean_db.end() ||
+                    clean_it->second.version < je->del.version)
                 {
                     // oid, version
                     obj_ver_id ov = {
@@ -863,7 +616,7 @@ int blockstore_init_journal::handle_journal_part(void *buf, uint64_t done_pos, u
                         .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,
@@ -873,9 +626,8 @@ int blockstore_init_journal::handle_journal_part(void *buf, uint64_t done_pos, u
                     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);
+                    bs->mark_stable(ov);
                 }
-                // Ignore delete if neither preceding dirty entries nor the clean one are present
             }
             started = true;
             pos += je->size;
@@ -886,36 +638,3 @@ 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_db = bs->clean_db_shard(oid);
-    auto clean_it = clean_db.find(oid);
-    uint64_t clean_loc = clean_it != 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);
-}

blockstore_init.h

@@ -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;
-    bool zero_on_init = false;
+    int wait_state = 0, wait_count = 0;
     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();

blockstore_journal.cpp

@@ -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;
@@ -96,8 +87,7 @@ int blockstore_journal_check_t::check_available(blockstore_op_t *op, int entries
         next_pos = next_pos + data_after;
         if (next_pos > bs->journal.len)
         {
-            if (right_dir)
-                next_pos = bs->journal.block_size + data_after;
+            next_pos = bs->journal.block_size + data_after;
             right_dir = false;
         }
     }
@@ -105,8 +95,10 @@ 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();
@@ -118,32 +110,31 @@ 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;
         memset(journal.inmemory
-            ? (uint8_t*)journal.buffer + journal.sector_info[journal.cur_sector].offset
-            : (uint8_t*)journal.sector_buf + journal.block_size*journal.cur_sector, 0, journal.block_size);
+            ? journal.buffer + journal.sector_info[journal.cur_sector].offset
+            : journal.sector_buf + journal.block_size*journal.cur_sector, 0, journal.block_size);
     }
     journal_entry *je = (struct journal_entry*)(
         (journal.inmemory
-            ? (uint8_t*)journal.buffer + journal.sector_info[journal.cur_sector].offset
-            : (uint8_t*)journal.sector_buf + journal.block_size*journal.cur_sector) + journal.in_sector_pos
+            ? journal.buffer + journal.sector_info[journal.cur_sector].offset
+            : journal.sector_buf + journal.block_size*journal.cur_sector) + journal.in_sector_pos
     );
     journal.in_sector_pos += size;
     je->magic = JOURNAL_MAGIC;
@@ -154,73 +145,21 @@ journal_entry* prefill_single_journal_entry(journal_t & journal, uint16_t type,
     return je;
 }
 
-void blockstore_impl_t::prepare_journal_sector_write(int cur_sector, blockstore_op_t *op)
+void prepare_journal_sector_write(journal_t & journal, int cur_sector, io_uring_sqe *sqe, std::function<void(ring_data_t*)> cb)
 {
-    // Don't submit the same sector twice in the same batch
-    if (!journal.sector_info[cur_sector].submit_id)
-    {
-        io_uring_sqe *sqe = get_sqe();
-        // Caller must ensure availability of an SQE
-        assert(sqe != NULL);
-        ring_data_t *data = ((ring_data_t*)sqe->user_data);
-        journal.sector_info[cur_sector].written = true;
-        journal.sector_info[cur_sector].submit_id = ++journal.submit_id;
-        journal.submitting_sectors.push_back(cur_sector);
-        journal.sector_info[cur_sector].flush_count++;
-        data->iov = (struct iovec){
-            (journal.inmemory
-                ? (uint8_t*)journal.buffer + journal.sector_info[cur_sector].offset
-                : (uint8_t*)journal.sector_buf + journal.block_size*cur_sector),
-            journal.block_size
-        };
-        data->callback = [this, flush_id = journal.submit_id](ring_data_t *data) { handle_journal_write(data, flush_id); };
-        my_uring_prep_writev(
-            sqe, journal.fd, &data->iov, 1, journal.offset + journal.sector_info[cur_sector].offset
-        );
-    }
     journal.sector_info[cur_sector].dirty = false;
-    // But always remember that this operation has to wait until this exact journal write is finished
-    journal.flushing_ops.insert((pending_journaling_t){
-        .flush_id = journal.sector_info[cur_sector].submit_id,
-        .sector = cur_sector,
-        .op = op,
-    });
-    auto priv = PRIV(op);
-    priv->pending_ops++;
-    if (!priv->min_flushed_journal_sector)
-        priv->min_flushed_journal_sector = 1+cur_sector;
-    priv->max_flushed_journal_sector = 1+cur_sector;
-}
-
-void blockstore_impl_t::handle_journal_write(ring_data_t *data, uint64_t flush_id)
-{
-    live = true;
-    if (data->res != data->iov.iov_len)
-    {
-        // FIXME: our state becomes corrupted after a write error. maybe do something better than just die
-        throw std::runtime_error(
-            "journal write failed ("+std::to_string(data->res)+" != "+std::to_string(data->iov.iov_len)+
-            "). in-memory state is corrupted. AAAAAAAaaaaaaaaa!!!111"
-        );
-    }
-    auto fl_it = journal.flushing_ops.upper_bound((pending_journaling_t){ .flush_id = flush_id });
-    if (fl_it != journal.flushing_ops.end() && fl_it->flush_id == flush_id)
-    {
-        journal.sector_info[fl_it->sector].flush_count--;
-    }
-    while (fl_it != journal.flushing_ops.end() && fl_it->flush_id == flush_id)
-    {
-        auto priv = PRIV(fl_it->op);
-        priv->pending_ops--;
-        assert(priv->pending_ops >= 0);
-        if (priv->pending_ops == 0)
-        {
-            release_journal_sectors(fl_it->op);
-            priv->op_state++;
-            ringloop->wakeup();
-        }
-        journal.flushing_ops.erase(fl_it++);
-    }
+    journal.sector_info[cur_sector].usage_count++;
+    ring_data_t *data = ((ring_data_t*)sqe->user_data);
+    data->iov = (struct iovec){
+        (journal.inmemory
+            ? journal.buffer + journal.sector_info[cur_sector].offset
+            : journal.sector_buf + journal.block_size*cur_sector),
+        journal.block_size
+    };
+    data->callback = cb;
+    my_uring_prep_writev(
+        sqe, journal.fd, &data->iov, 1, journal.offset + journal.sector_info[cur_sector].offset
+    );
 }
 
 journal_t::~journal_t()
@@ -236,7 +175,7 @@ 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
@@ -254,35 +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;
     }
-    // Can't trim journal
-    return used_start;
-}
-
-void journal_t::dump_diagnostics()
-{
-    auto journal_used_it = used_sectors.lower_bound(used_start);
-    if (journal_used_it == used_sectors.end())
+    else
     {
-        // Journal is cleared to its end, restart from the beginning
-        journal_used_it = used_sectors.begin();
+        // Can't trim journal
+        return false;
     }
-    printf(
-        "Journal: used_start=%08lx next_free=%08lx dirty_start=%08lx trim_to=%08lx trim_to_refs=%ld\n",
-        used_start, next_free, dirty_start,
-        journal_used_it == used_sectors.end() ? 0 : journal_used_it->first,
-        journal_used_it == used_sectors.end() ? 0 : journal_used_it->second
-    );
+#ifdef BLOCKSTORE_DEBUG
+    printf("Journal trimmed to %08lx (next_free=%08lx)\n", used_start, next_free);
+#endif
+    return true;
 }

blockstore_journal.h

@@ -1,19 +1,12 @@
-// Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.1 (see README.md for details)
-
 #pragma once
 
 #include "crc32c.h"
-#include <set>
 
 #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
@@ -26,9 +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
@@ -39,9 +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
 {
@@ -58,9 +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
@@ -75,9 +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
@@ -143,30 +126,15 @@ 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;
-    uint64_t submit_id;
 };
 
-struct pending_journaling_t
-{
-    uint64_t flush_id;
-    int sector;
-    blockstore_op_t *op;
-};
-
-inline bool operator < (const pending_journaling_t & a, const pending_journaling_t & b)
-{
-    return a.flush_id < b.flush_id || a.flush_id == b.flush_id && a.op < b.op;
-}
-
 struct journal_t
 {
     int fd;
     uint64_t device_size;
     bool inmemory = false;
-    bool flush_journal = false;
     void *buffer = NULL;
 
     uint64_t block_size;
@@ -183,12 +151,8 @@ 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;
-    std::vector<int> submitting_sectors;
-    std::set<pending_journaling_t> flushing_ops;
-    uint64_t submit_id = 0;
 
     // Used sector map
     // May use ~ 80 MB per 1 GB of used journal space in the worst case
@@ -196,20 +160,13 @@ struct journal_t
 
     ~journal_t();
     bool trim();
-    uint64_t get_trim_pos();
-    void dump_diagnostics();
-    inline bool entry_fits(int size)
-    {
-        return !(block_size - in_sector_pos < size ||
-            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);
@@ -217,3 +174,5 @@ struct blockstore_journal_check_t
 };
 
 journal_entry* prefill_single_journal_entry(journal_t & journal, uint16_t type, uint32_t size);
+
+void prepare_journal_sector_write(journal_t & journal, int sector, io_uring_sqe *sqe, std::function<void(ring_data_t*)> cb);

blockstore_open.cpp

@@ -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");
     }
@@ -295,9 +252,9 @@ void blockstore_impl_t::calc_lengths()
     }
 }
 
-static void check_size(int fd, uint64_t *size, uint64_t *sectsize, std::string name)
+void check_size(int fd, uint64_t *size, std::string name)
 {
-    int sect;
+    int sectsize;
     struct stat st;
     if (fstat(fd, &st) < 0)
     {
@@ -306,21 +263,14 @@ static void check_size(int fd, uint64_t *size, uint64_t *sectsize, std::string n
     if (S_ISREG(st.st_mode))
     {
         *size = st.st_size;
-        if (sectsize)
-        {
-            *sectsize = st.st_blksize;
-        }
     }
     else if (S_ISBLK(st.st_mode))
     {
-        if (ioctl(fd, BLKGETSIZE64, size) < 0 ||
-            ioctl(fd, BLKSSZGET, &sect) < 0)
+        if (ioctl(fd, BLKSSZGET, &sectsize) < 0 ||
+            ioctl(fd, BLKGETSIZE64, size) < 0 ||
+            sectsize != 512)
         {
-            throw std::runtime_error("failed to get "+name+" size or block size: "+strerror(errno));
-        }
-        if (sectsize)
-        {
-            *sectsize = sect;
+            throw std::runtime_error(name+" sector is not equal to 512 bytes");
         }
     }
     else
@@ -336,14 +286,7 @@ void blockstore_impl_t::open_data()
     {
         throw std::runtime_error("Failed to open data device");
     }
-    check_size(data_fd, &data_size, &data_device_sect, "data device");
-    if (disk_alignment % data_device_sect)
-    {
-        throw std::runtime_error(
-            "disk_alignment ("+std::to_string(disk_alignment)+
-            ") is not a multiple of data device sector size ("+std::to_string(data_device_sect)+")"
-        );
-    }
+    check_size(data_fd, &data_size, "data device");
     if (data_offset >= data_size)
     {
         throw std::runtime_error("data_offset exceeds device size = "+std::to_string(data_size));
@@ -364,7 +307,7 @@ void blockstore_impl_t::open_meta()
         {
             throw std::runtime_error("Failed to open metadata device");
         }
-        check_size(meta_fd, &meta_size, &meta_device_sect, "metadata device");
+        check_size(meta_fd, &meta_size, "metadata device");
         if (meta_offset >= meta_size)
         {
             throw std::runtime_error("meta_offset exceeds device size = "+std::to_string(meta_size));
@@ -377,20 +320,12 @@ void blockstore_impl_t::open_meta()
     else
     {
         meta_fd = data_fd;
-        meta_device_sect = data_device_sect;
         meta_size = 0;
         if (meta_offset >= data_size)
         {
             throw std::runtime_error("meta_offset exceeds device size = "+std::to_string(data_size));
         }
     }
-    if (meta_block_size % meta_device_sect)
-    {
-        throw std::runtime_error(
-            "meta_block_size ("+std::to_string(meta_block_size)+
-            ") is not a multiple of data device sector size ("+std::to_string(meta_device_sect)+")"
-        );
-    }
 }
 
 void blockstore_impl_t::open_journal()
@@ -402,7 +337,7 @@ void blockstore_impl_t::open_journal()
         {
             throw std::runtime_error("Failed to open journal device");
         }
-        check_size(journal.fd, &journal.device_size, &journal_device_sect, "journal device");
+        check_size(journal.fd, &journal.device_size, "journal device");
         if (!disable_flock && flock(journal.fd, LOCK_EX|LOCK_NB) != 0)
         {
             throw std::runtime_error(std::string("Failed to lock journal device: ") + strerror(errno));
@@ -411,7 +346,6 @@ void blockstore_impl_t::open_journal()
     else
     {
         journal.fd = meta_fd;
-        journal_device_sect = meta_device_sect;
         journal.device_size = 0;
         if (journal.offset >= data_size)
         {
@@ -429,11 +363,4 @@ void blockstore_impl_t::open_journal()
         if (!journal.sector_buf)
             throw std::bad_alloc();
     }
-    if (journal_block_size % journal_device_sect)
-    {
-        throw std::runtime_error(
-            "journal_block_size ("+std::to_string(journal_block_size)+
-            ") is not a multiple of journal device sector size ("+std::to_string(journal_device_sect)+")"
-        );
-    }
 }

blockstore_read.cpp

@@ -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,
@@ -24,7 +21,7 @@ int blockstore_impl_t::fulfill_read_push(blockstore_op_t *op, void *buf, uint64_
     }
     if (journal.inmemory && IS_JOURNAL(item_state))
     {
-        memcpy(buf, (uint8_t*)journal.buffer + offset, len);
+        memcpy(buf, journal.buffer + offset, len);
         return 1;
     }
     BS_SUBMIT_GET_SQE(sqe, data);
@@ -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 = {
@@ -75,7 +59,7 @@ int blockstore_impl_t::fulfill_read(blockstore_op_t *read_op, uint64_t &fulfille
                 };
                 it = PRIV(read_op)->read_vec.insert(it, el);
                 if (!fulfill_read_push(read_op,
-                    (uint8_t*)read_op->buf + el.offset - read_op->offset,
+                    read_op->buf + el.offset - read_op->offset,
                     item_location + el.offset - item_start,
                     el.len, item_state, item_version))
                 {
@@ -85,33 +69,14 @@ 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_db = clean_db_shard(read_op->oid);
     auto clean_it = clean_db.find(read_op->oid);
     auto dirty_it = dirty_db.upper_bound((obj_ver_id){
         .oid = read_op->oid,
@@ -128,7 +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;
@@ -150,11 +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)))
@@ -176,17 +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();
@@ -195,7 +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)
                 {
@@ -206,8 +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)
@@ -217,8 +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();
@@ -233,7 +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;
@@ -247,10 +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)
@@ -269,51 +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_db = clean_db_shard(oid);
-    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;
-}

blockstore_rollback.cpp

@@ -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())
                 {
@@ -60,43 +52,50 @@ 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))
     {
         return 0;
     }
-    // There is sufficient space. Check SQEs
-    BS_SUBMIT_CHECK_SQES(space_check.sectors_to_write);
+    // There is sufficient space. Get SQEs
+    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
-    int s = 0;
+    auto cb = [this, op](ring_data_t *data) { handle_rollback_event(data, op); };
+    int s = 0, cur_sector = -1;
+    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;
+        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++)
     {
-        if (!journal.entry_fits(sizeof(journal_entry_rollback)) &&
-            journal.sector_info[journal.cur_sector].dirty)
-        {
-            prepare_journal_sector_write(journal.cur_sector, op);
-            s++;
-        }
         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;
+        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);
+        }
     }
-    prepare_journal_sector_write(journal.cur_sector, op);
-    s++;
-    assert(s == space_check.sectors_to_write);
+    PRIV(op)->max_flushed_journal_sector = 1 + journal.cur_sector;
+    PRIV(op)->pending_ops = s;
     PRIV(op)->op_state = 1;
+    inflight_writes++;
     return 1;
 }
 
@@ -104,34 +103,45 @@ int blockstore_impl_t::continue_rollback(blockstore_op_t *op)
 {
     if (PRIV(op)->op_state == 2)
         goto resume_2;
-    else if (PRIV(op)->op_state == 4)
-        goto resume_4;
+    else if (PRIV(op)->op_state == 3)
+        goto resume_3;
+    else if (PRIV(op)->op_state == 5)
+        goto resume_5;
     else
         return 1;
 resume_2:
+    // Release used journal sectors
+    release_journal_sectors(op);
+resume_3:
     if (!disable_journal_fsync)
     {
-        BS_SUBMIT_GET_SQE(sqe, data);
+        io_uring_sqe *sqe = 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 };
-        data->callback = [this, op](ring_data_t *data) { handle_write_event(data, op); };
+        data->callback = [this, op](ring_data_t *data) { handle_rollback_event(data, op); };
         PRIV(op)->min_flushed_journal_sector = PRIV(op)->max_flushed_journal_sector = 0;
         PRIV(op)->pending_ops = 1;
-        PRIV(op)->op_state = 3;
+        PRIV(op)->op_state = 4;
         return 1;
     }
-resume_4:
+resume_5:
     obj_ver_id* v;
     int i;
     for (i = 0, v = (obj_ver_id*)op->buf; i < op->len; i++, v++)
     {
         mark_rolled_back(*v);
     }
-    flusher->mark_trim_possible();
+    journal.trim();
+    inflight_writes--;
     // Acknowledge op
     op->retval = 0;
     FINISH_OP(op);
-    return 2;
+    return 1;
 }
 
 void blockstore_impl_t::mark_rolled_back(const obj_ver_id & ov)
@@ -146,7 +156,10 @@ void blockstore_impl_t::mark_rolled_back(const obj_ver_id & ov)
         auto rm_start = it;
         auto rm_end = it;
         it--;
-        while (1)
+        while (it->first.oid == ov.oid &&
+            it->first.version > ov.version &&
+            !IS_IN_FLIGHT(it->second.state) &&
+            !IS_STABLE(it->second.state))
         {
             if (it->first.oid != ov.oid)
                 break;
@@ -156,7 +169,7 @@ void blockstore_impl_t::mark_rolled_back(const obj_ver_id & ov)
                     max_unstable = it->first.version;
                 break;
             }
-            else if (IS_IN_FLIGHT(it->second.state) || IS_STABLE(it->second.state))
+            else if (IS_STABLE(it->second.state))
                 break;
             // Remove entry
             rm_start = it;
@@ -167,65 +180,57 @@ void blockstore_impl_t::mark_rolled_back(const obj_ver_id & ov)
         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;
-            }
+        }
+        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;
+        }
+    }
+}
+
+void blockstore_impl_t::handle_rollback_event(ring_data_t *data, blockstore_op_t *op)
+{
+    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"
+        );
+    }
+    PRIV(op)->pending_ops--;
+    if (PRIV(op)->pending_ops == 0)
+    {
+        PRIV(op)->op_state++;
+        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;
-    dirty_it--;
-    if (IS_DELETE(dirty_it->second.state))
+    while (dirty_it != dirty_start)
     {
-        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,
+            "remove usage of journal offset %08lx by %lu:%lu 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
         );
 #endif
@@ -233,16 +238,6 @@ void blockstore_impl_t::erase_dirty(blockstore_dirty_db_t::iterator dirty_start,
         {
             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);
 }

blockstore_stable.cpp

@@ -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:
@@ -54,31 +51,25 @@ int blockstore_impl_t::dequeue_stable(blockstore_op_t *op)
         auto dirty_it = dirty_db.find(*v);
         if (dirty_it == dirty_db.end())
         {
-            auto & clean_db = clean_db_shard(v->oid);
             auto clean_it = clean_db.find(v->oid);
             if (clean_it == clean_db.end() || clean_it->second.version < v->version)
             {
                 // 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))
         {
@@ -90,7 +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);
@@ -98,30 +89,45 @@ int blockstore_impl_t::dequeue_stable(blockstore_op_t *op)
     {
         return 0;
     }
-    // There is sufficient space. Check SQEs
-    BS_SUBMIT_CHECK_SQES(space_check.sectors_to_write);
+    // There is sufficient space. Get SQEs
+    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
-    int s = 0;
+    auto cb = [this, op](ring_data_t *data) { handle_stable_event(data, op); };
+    int s = 0, cur_sector = -1;
+    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;
+        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
-        if (!journal.entry_fits(sizeof(journal_entry_stable)) &&
-            journal.sector_info[journal.cur_sector].dirty)
-        {
-            prepare_journal_sector_write(journal.cur_sector, op);
-            s++;
-        }
         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;
+        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);
+        }
     }
-    prepare_journal_sector_write(journal.cur_sector, op);
-    s++;
-    assert(s == space_check.sectors_to_write);
+    PRIV(op)->max_flushed_journal_sector = 1 + journal.cur_sector;
+    PRIV(op)->pending_ops = s;
     PRIV(op)->op_state = 1;
+    inflight_writes++;
     return 1;
 }
 
@@ -129,102 +135,77 @@ int blockstore_impl_t::continue_stable(blockstore_op_t *op)
 {
     if (PRIV(op)->op_state == 2)
         goto resume_2;
-    else if (PRIV(op)->op_state == 4)
-        goto resume_4;
+    else if (PRIV(op)->op_state == 3)
+        goto resume_3;
+    else if (PRIV(op)->op_state == 5)
+        goto resume_5;
     else
         return 1;
 resume_2:
+    // Release used journal sectors
+    release_journal_sectors(op);
+resume_3:
     if (!disable_journal_fsync)
     {
-        BS_SUBMIT_GET_SQE(sqe, data);
+        {
+            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 };
-        data->callback = [this, op](ring_data_t *data) { handle_write_event(data, op); };
+        data->callback = [this, op](ring_data_t *data) { handle_stable_event(data, op); };
         PRIV(op)->min_flushed_journal_sector = PRIV(op)->max_flushed_journal_sector = 0;
         PRIV(op)->pending_ops = 1;
-        PRIV(op)->op_state = 3;
+        PRIV(op)->op_state = 4;
         return 1;
     }
-resume_4:
+resume_5:
     // Mark dirty_db entries as stable, acknowledge op completion
     obj_ver_id* v;
     int i;
     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);
     }
+    inflight_writes--;
     // Acknowledge op
     op->retval = 0;
     FINISH_OP(op);
-    return 2;
+    return 1;
 }
 
-void blockstore_impl_t::mark_stable(const obj_ver_id & v, bool forget_dirty)
+void blockstore_impl_t::mark_stable(const obj_ver_id & 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;
-                        }
-                    }
-                    if (exists == -1)
-                    {
-                        auto & clean_db = clean_db_shard(v.oid);
-                        auto clean_it = clean_db.find(v.oid);
-                        exists = clean_it != clean_db.end() ? 1 : 0;
-                    }
-                    if (!exists)
-                    {
-                        inode_space_stats[dirty_it->first.oid.inode] += block_size;
-                    }
-                }
-                else if (IS_DELETE(dirty_it->second.state))
-                {
-                    inode_space_stats[dirty_it->first.oid.inode] -= block_size;
-                }
+                dirty_it->second.state = ST_J_STABLE;
             }
-            if (forget_dirty && (IS_BIG_WRITE(dirty_it->second.state) ||
-                IS_DELETE(dirty_it->second.state)))
+            else if (dirty_it->second.state == ST_D_SYNCED)
+            {
+                dirty_it->second.state = ST_D_STABLE;
+            }
+            else if (dirty_it->second.state == ST_DEL_SYNCED)
+            {
+                dirty_it->second.state = ST_DEL_STABLE;
+            }
+            else if (IS_STABLE(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_db = clean_db_shard(v.oid);
-                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;
             }
@@ -234,6 +215,9 @@ void blockstore_impl_t::mark_stable(const obj_ver_id & v, bool forget_dirty)
                 break;
             }
         }
+#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);
@@ -243,3 +227,30 @@ void blockstore_impl_t::mark_stable(const obj_ver_id & v, bool forget_dirty)
         unstable_writes.erase(unstab_it);
     }
 }
+
+void blockstore_impl_t::handle_stable_event(ring_data_t *data, blockstore_op_t *op)
+{
+    live = true;
+    if (data->res != data->iov.iov_len)
+    {
+        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"
+        );
+    }
+    PRIV(op)->pending_ops--;
+    if (PRIV(op)->pending_ops == 0)
+    {
+        {
+            timespec now;
+            clock_gettime(CLOCK_REALTIME, &now);
+            printf("finished %s %d %ld.%06ld\n", __FILE__, __LINE__, now.tv_sec, now.tv_nsec/1000);
+        }
+        PRIV(op)->op_state++;
+        if (!continue_stable(op))
+        {
+            submit_queue.push_front(op);
+        }
+    }
+}

blockstore_sync.cpp

@@ -0,0 +1,292 @@
+#include "blockstore_impl.h"
+
+#define SYNC_HAS_SMALL 1
+#define SYNC_HAS_BIG 2
+#define SYNC_DATA_SYNC_SENT 3
+#define SYNC_DATA_SYNC_DONE 4
+#define SYNC_JOURNAL_WRITE_SENT 5
+#define SYNC_JOURNAL_WRITE_DONE 6
+#define SYNC_JOURNAL_SYNC_SENT 7
+#define SYNC_DONE 8
+
+int blockstore_impl_t::dequeue_sync(blockstore_op_t *op)
+{
+    if (PRIV(op)->op_state == 0)
+    {
+        stop_sync_submitted = false;
+        PRIV(op)->sync_big_writes.swap(unsynced_big_writes);
+        PRIV(op)->sync_small_writes.swap(unsynced_small_writes);
+        PRIV(op)->sync_small_checked = 0;
+        PRIV(op)->sync_big_checked = 0;
+        unsynced_big_writes.clear();
+        unsynced_small_writes.clear();
+        if (PRIV(op)->sync_big_writes.size() > 0)
+            PRIV(op)->op_state = SYNC_HAS_BIG;
+        else if (PRIV(op)->sync_small_writes.size() > 0)
+            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, 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;
+            return 1;
+        }
+        else
+        {
+            PRIV(op)->op_state = SYNC_JOURNAL_WRITE_DONE;
+        }
+    }
+    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 = 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;
+            return 1;
+        }
+        else
+        {
+            PRIV(op)->op_state = SYNC_DATA_SYNC_DONE;
+        }
+    }
+    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), 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_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;
+        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;
+            cur_sector = journal.cur_sector;
+            prepare_journal_sector_write(journal, cur_sector, sqe[s++], cb);
+        }
+        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 %lu:%lu v%lu (%lu refs)\n",
+                dirty_db[*it].journal_sector, it->oid.inode, it->oid.stripe, it->version,
+                journal.used_sectors[journal.sector_info[journal.cur_sector].offset]
+            );
+#endif
+            je->oid = it->oid;
+            je->version = it->version;
+            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++;
+            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;
+        return 1;
+    }
+    if (PRIV(op)->op_state == SYNC_JOURNAL_WRITE_DONE)
+    {
+        if (!disable_journal_fsync)
+        {
+            BS_SUBMIT_GET_SQE(sqe, data);
+            my_uring_prep_fsync(sqe, journal.fd, IORING_FSYNC_DATASYNC);
+            data->iov = { 0 };
+            data->callback = cb;
+            PRIV(op)->pending_ops = 1;
+            PRIV(op)->op_state = SYNC_JOURNAL_SYNC_SENT;
+            return 1;
+        }
+        else
+        {
+            PRIV(op)->op_state = SYNC_DONE;
+        }
+    }
+    if (PRIV(op)->op_state == SYNC_DONE)
+    {
+        return ack_sync(op);
+    }
+    return 1;
+}
+
+void blockstore_impl_t::handle_sync_event(ring_data_t *data, blockstore_op_t *op)
+{
+    live = true;
+    if (data->res != data->iov.iov_len)
+    {
+        throw std::runtime_error(
+            "write operation failed ("+std::to_string(data->res)+" != "+std::to_string(data->iov.iov_len)+
+            "). in-memory state is corrupted. AAAAAAAaaaaaaaaa!!!111"
+        );
+    }
+    PRIV(op)->pending_ops--;
+    if (PRIV(op)->pending_ops == 0)
+    {
+        // Release used journal sectors
+        release_journal_sectors(op);
+        // Handle states
+        if (PRIV(op)->op_state == SYNC_DATA_SYNC_SENT)
+        {
+            PRIV(op)->op_state = SYNC_DATA_SYNC_DONE;
+        }
+        else if (PRIV(op)->op_state == SYNC_JOURNAL_WRITE_SENT)
+        {
+            PRIV(op)->op_state = SYNC_JOURNAL_WRITE_DONE;
+        }
+        else if (PRIV(op)->op_state == SYNC_JOURNAL_SYNC_SENT)
+        {
+            PRIV(op)->op_state = SYNC_DONE;
+            ack_sync(op);
+        }
+        else
+        {
+            throw std::runtime_error("BUG: unexpected sync op state");
+        }
+    }
+}
+
+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 %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 = ST_D_SYNCED;
+        dirty_it++;
+        while (dirty_it != dirty_db.end() && dirty_it->first.oid == it->oid)
+        {
+            if (dirty_it->second.state == ST_J_WAIT_BIG)
+            {
+                dirty_it->second.state = ST_J_IN_FLIGHT;
+            }
+            dirty_it++;
+        }
+    }
+    for (auto it = PRIV(op)->sync_small_writes.begin(); it != PRIV(op)->sync_small_writes.end(); it++)
+    {
+#ifdef BLOCKSTORE_DEBUG
+        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 == ST_DEL_WRITTEN)
+        {
+            dirty_db[*it].state = ST_DEL_SYNCED;
+            // Deletions are treated as immediately stable
+            mark_stable(*it);
+        }
+        else /* == ST_J_WRITTEN */
+        {
+            dirty_db[*it].state = ST_J_SYNCED;
+        }
+    }
+    in_progress_syncs.erase(PRIV(op)->in_progress_ptr);
+    op->retval = 0;
+    FINISH_OP(op);
+}

blockstore_write.cpp

@@ -0,0 +1,522 @@
+#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,
+    });
+    assert(dirty_it != dirty_db.end());
+    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 %08lx is used by %lu:%lu v%lu (%lu refs)\n",
+            dirty_it->second.journal_sector, dirty_it->first.oid.inode, dirty_it->first.oid.stripe, dirty_it->first.version,
+            journal.used_sectors[journal.sector_info[journal.cur_sector].offset]
+        );
+#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,
+    });
+    assert(dirty_it != dirty_db.end());
+    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 %08lx is used by %lu:%lu v%lu (%lu refs)\n",
+        journal.sector_info[journal.cur_sector].offset, op->oid.inode, op->oid.stripe, op->version,
+        journal.used_sectors[journal.sector_info[journal.cur_sector].offset]
+    );
+#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 (imm)
+        {
+            // Deletions are treated as immediately stable
+            mark_stable(dirty_it->first);
+        }
+    }
+    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 (new_ds >= journal.len)
+                {
+                    new_ds = 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,
+    });
+    assert(dirty_it != dirty_db.end());
+    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 %08lx is used by %lu:%lu v%lu (%lu refs)\n",
+        dirty_it->second.journal_sector, dirty_it->first.oid.inode, dirty_it->first.oid.stripe, dirty_it->first.version,
+        journal.used_sectors[journal.sector_info[journal.cur_sector].offset]
+    );
+#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;
+}

cluster_client.cpp

@@ -0,0 +1,349 @@
+#include "cluster_client.h"
+
+cluster_client_t::cluster_client_t(ring_loop_t *ringloop, timerfd_manager_t *tfd, json11::Json & config)
+{
+    this->ringloop = ringloop;
+    this->tfd = tfd;
+
+    msgr.tfd = tfd;
+    msgr.ringloop = ringloop;
+    msgr.repeer_pgs = [this](osd_num_t peer_osd)
+    {
+        // peer_osd just connected or dropped connection
+        if (msgr.osd_peer_fds.find(peer_osd) != msgr.osd_peer_fds.end())
+        {
+            // really connected :)
+            continue_ops();
+        }
+    };
+
+    st_cli.tfd = tfd;
+    st_cli.on_load_config_hook = [this](json11::Json::object & cfg) { on_load_config_hook(cfg); };
+    st_cli.on_change_osd_state_hook = [this](uint64_t peer_osd) { on_change_osd_state_hook(peer_osd); };
+    st_cli.on_change_hook = [this](json11::Json::object & changes) { on_change_hook(changes); };
+    st_cli.on_load_pgs_hook = [this](bool success) { on_load_pgs_hook(success); };
+
+    log_level = config["log_level"].int64_value();
+    st_cli.parse_config(config);
+    st_cli.load_global_config();
+}
+
+void cluster_client_t::continue_ops()
+{
+    for (auto op_it = unsent_ops.begin(); op_it != unsent_ops.end(); )
+    {
+        cluster_op_t *op = *op_it;
+        if (op->needs_reslice && !op->sent_count)
+        {
+            op->parts.clear();
+            op->done_count = 0;
+            op->needs_reslice = false;
+        }
+        if (!op->parts.size())
+        {
+            unsent_ops.erase(op_it++);
+            execute(op);
+            continue;
+        }
+        if (!op->needs_reslice)
+        {
+            for (auto & op_part: op->parts)
+            {
+                if (!op_part.sent && !op_part.done)
+                {
+                    try_send(op, &op_part);
+                }
+            }
+            if (op->sent_count == op->parts.size() - op->done_count)
+            {
+                unsent_ops.erase(op_it++);
+                sent_ops.insert(op);
+            }
+            else
+                op_it++;
+        }
+        else
+            op_it++;
+    }
+}
+
+static uint32_t is_power_of_two(uint64_t value)
+{
+    uint32_t l = 0;
+    while (value > 1)
+    {
+        if (value & 1)
+        {
+            return 64;
+        }
+        value = value >> 1;
+        l++;
+    }
+    return l;
+}
+
+void cluster_client_t::on_load_config_hook(json11::Json::object & config)
+{
+    bs_block_size = config["block_size"].uint64_value();
+    bs_disk_alignment = config["disk_alignment"].uint64_value();
+    bs_bitmap_granularity = config["bitmap_granularity"].uint64_value();
+    if (!bs_block_size)
+        bs_block_size = DEFAULT_BLOCK_SIZE;
+    if (!bs_disk_alignment)
+        bs_disk_alignment = DEFAULT_DISK_ALIGNMENT;
+    if (!bs_bitmap_granularity)
+        bs_bitmap_granularity = DEFAULT_BITMAP_GRANULARITY;
+    {
+        uint32_t block_order;
+        if ((block_order = is_power_of_two(bs_block_size)) >= 64 || bs_block_size < MIN_BLOCK_SIZE || bs_block_size >= MAX_BLOCK_SIZE)
+            throw std::runtime_error("Bad block size");
+    }
+    if (config.find("pg_stripe_size") != config.end())
+    {
+        pg_stripe_size = config["pg_stripe_size"].uint64_value();
+        if (!pg_stripe_size)
+            pg_stripe_size = DEFAULT_PG_STRIPE_SIZE;
+    }
+    if (config["immediate_commit"] == "all")
+    {
+        // Cluster-wide immediate_commit mode
+        immediate_commit = true;
+    }
+    msgr.peer_connect_interval = config["peer_connect_interval"].uint64_value();
+    if (!msgr.peer_connect_interval)
+        msgr.peer_connect_interval = DEFAULT_PEER_CONNECT_INTERVAL;
+    msgr.peer_connect_timeout = config["peer_connect_timeout"].uint64_value();
+    if (!msgr.peer_connect_timeout)
+        msgr.peer_connect_timeout = DEFAULT_PEER_CONNECT_TIMEOUT;
+}
+
+void cluster_client_t::on_load_pgs_hook(bool success)
+{
+    if (success)
+    {
+        pg_count = st_cli.pg_config.size();
+        continue_ops();
+    }
+}
+
+void cluster_client_t::on_change_hook(json11::Json::object & changes)
+{
+    if (pg_count != st_cli.pg_config.size())
+    {
+        // At this point, all operations should be suspended
+        // And they need to be resliced!
+        for (auto op: unsent_ops)
+        {
+            op->needs_reslice = true;
+        }
+        for (auto op: sent_ops)
+        {
+            op->needs_reslice = true;
+        }
+        pg_count = st_cli.pg_config.size();
+    }
+    continue_ops();
+}
+
+void cluster_client_t::on_change_osd_state_hook(uint64_t peer_osd)
+{
+    if (msgr.wanted_peers.find(peer_osd) != msgr.wanted_peers.end())
+    {
+        msgr.connect_peer(peer_osd, st_cli.peer_states[peer_osd]);
+    }
+}
+
+// FIXME: Implement OSD_OP_SYNC for immediate_commit == false
+void cluster_client_t::execute(cluster_op_t *op)
+{
+    if (op->opcode == OSD_OP_SYNC && immediate_commit)
+    {
+        // Syncs are not required in the immediate_commit mode
+        op->retval = 0;
+        std::function<void(cluster_op_t*)>(op->callback)(op);
+        return;
+    }
+    if (op->opcode != OSD_OP_READ && op->opcode != OSD_OP_OUT || !op->inode || !op->len ||
+        op->offset % bs_disk_alignment || op->len % bs_disk_alignment)
+    {
+        op->retval = -EINVAL;
+        std::function<void(cluster_op_t*)>(op->callback)(op);
+        return;
+    }
+    if (!pg_stripe_size)
+    {
+        // Config is not loaded yet
+        unsent_ops.insert(op);
+        return;
+    }
+    if (op->opcode == OSD_OP_WRITE && !immediate_commit)
+    {
+        // Copy operation
+        cluster_op_t *op_copy = new cluster_op_t();
+        op_copy->opcode = op->opcode;
+        op_copy->inode = op->inode;
+        op_copy->offset = op->offset;
+        op_copy->len = op->len;
+        op_copy->buf = malloc(op->len);
+        memcpy(op_copy->buf, op->buf, op->len);
+        unsynced_ops.push_back(op_copy);
+        unsynced_bytes += op->len;
+        if (inmemory_commit)
+        {
+            // Immediately acknowledge write and continue with the copy
+            op->retval = op->len;
+            std::function<void(cluster_op_t*)>(op->callback)(op);
+            op = op_copy;
+        }
+        if (unsynced_bytes >= inmemory_dirty_limit)
+        {
+            // Push an extra SYNC operation
+        }
+    }
+    // Slice the request into individual object stripe requests
+    // Primary OSDs still operate individual stripes, but their size is multiplied by PG minsize in case of EC
+    uint64_t pg_block_size = bs_block_size * pg_part_count;
+    uint64_t first_stripe = (op->offset / pg_block_size) * pg_block_size;
+    uint64_t last_stripe = ((op->offset + op->len + pg_block_size - 1) / pg_block_size - 1) * pg_block_size;
+    int part_count = 0;
+    for (uint64_t stripe = first_stripe; stripe <= last_stripe; stripe += pg_block_size)
+    {
+        if (op->offset < (stripe+pg_block_size) && (op->offset+op->len) > stripe)
+        {
+            part_count++;
+        }
+    }
+    op->parts.resize(part_count);
+    bool resend = false;
+    int i = 0;
+    for (uint64_t stripe = first_stripe; stripe <= last_stripe; stripe += pg_block_size)
+    {
+        uint64_t stripe_end = stripe + pg_block_size;
+        if (op->offset < stripe_end && (op->offset+op->len) > stripe)
+        {
+            pg_num_t pg_num = (op->inode + stripe/pg_stripe_size) % pg_count + 1;
+            op->parts[i] = {
+                .parent = op,
+                .offset = op->offset < stripe ? stripe : op->offset,
+                .len = (uint32_t)((op->offset+op->len) > stripe_end ? pg_block_size : op->offset+op->len-stripe),
+                .pg_num = pg_num,
+                .buf = op->buf + (op->offset < stripe ? stripe-op->offset : 0),
+                .sent = false,
+                .done = false,
+            };
+            if (!try_send(op, &op->parts[i]))
+            {
+                // Part needs to be sent later
+                resend = true;
+            }
+            i++;
+        }
+    }
+    if (resend)
+    {
+        unsent_ops.insert(op);
+    }
+    else
+    {
+        sent_ops.insert(op);
+    }
+}
+
+bool cluster_client_t::try_send(cluster_op_t *op, cluster_op_part_t *part)
+{
+    auto pg_it = st_cli.pg_config.find(part->pg_num);
+    if (pg_it != st_cli.pg_config.end() &&
+        !pg_it->second.pause && pg_it->second.cur_primary)
+    {
+        osd_num_t primary_osd = pg_it->second.cur_primary;
+        auto peer_it = msgr.osd_peer_fds.find(primary_osd);
+        if (peer_it != msgr.osd_peer_fds.end())
+        {
+            int peer_fd = peer_it->second;
+            part->osd_num = primary_osd;
+            part->sent = true;
+            op->sent_count++;
+            part->op = {
+                .op_type = OSD_OP_OUT,
+                .peer_fd = peer_fd,
+                .req = { .rw = {
+                    .header = {
+                        .magic = SECONDARY_OSD_OP_MAGIC,
+                        .id = op_id++,
+                        .opcode = op->opcode,
+                    },
+                    .inode = op->inode,
+                    .offset = part->offset,
+                    .len = part->len,
+                } },
+                .callback = [this, part](osd_op_t *op_part)
+                {
+                    handle_op_part(part);
+                },
+            };
+            part->op.send_list.push_back(part->op.req.buf, OSD_PACKET_SIZE);
+            if (op->opcode == OSD_OP_WRITE)
+            {
+                part->op.send_list.push_back(part->buf, part->len);
+            }
+            else
+            {
+                part->op.buf = part->buf;
+            }
+            msgr.outbox_push(&part->op);
+            return true;
+        }
+        else if (msgr.wanted_peers.find(primary_osd) == msgr.wanted_peers.end())
+        {
+            msgr.connect_peer(primary_osd, st_cli.peer_states[primary_osd]);
+        }
+    }
+    return false;
+}
+
+void cluster_client_t::handle_op_part(cluster_op_part_t *part)
+{
+    cluster_op_t *op = part->parent;
+    part->sent = false;
+    op->sent_count--;
+    part->op.buf = NULL;
+    if (part->op.reply.hdr.retval != part->op.req.rw.len)
+    {
+        // Operation failed, retry
+        printf(
+            "Operation part failed on OSD %lu: retval=%ld (expected %u), reconnecting\n",
+            part->osd_num, part->op.reply.hdr.retval, part->op.req.rw.len
+        );
+        msgr.stop_client(part->op.peer_fd);
+        if (op->sent_count == op->parts.size() - op->done_count - 1)
+        {
+            // Resend later when OSDs come up
+            // FIXME: Check for different types of errors
+            // FIXME: Repeat operations after a small timeout, for the case when OSD is coming up
+            sent_ops.erase(op);
+            unsent_ops.insert(op);
+        }
+        if (op->sent_count == 0 && op->needs_reslice)
+        {
+            // PG count has changed, reslice the operation
+            unsent_ops.erase(op);
+            op->parts.clear();
+            op->done_count = 0;
+            op->needs_reslice = false;
+            execute(op);
+        }
+    }
+    else
+    {
+        // OK
+        part->done = true;
+        op->done_count++;
+        if (op->done_count >= op->parts.size())
+        {
+            // Finished!
+            sent_ops.erase(op);
+            op->retval = op->len;
+            std::function<void(cluster_op_t*)>(op->callback)(op);
+        }
+    }
+}

cluster_client.h

@@ -0,0 +1,80 @@
+#pragma once
+
+#include "messenger.h"
+#include "etcd_state_client.h"
+
+#define MIN_BLOCK_SIZE 4*1024
+#define MAX_BLOCK_SIZE 128*1024*1024
+#define DEFAULT_BLOCK_SIZE 128*1024
+#define DEFAULT_PG_STRIPE_SIZE 4*1024*1024
+#define DEFAULT_DISK_ALIGNMENT 4096
+#define DEFAULT_BITMAP_GRANULARITY 4096
+
+struct cluster_op_t;
+
+struct cluster_op_part_t
+{
+    cluster_op_t *parent;
+    uint64_t offset;
+    uint32_t len;
+    pg_num_t pg_num;
+    osd_num_t osd_num;
+    void *buf;
+    bool sent;
+    bool done;
+    osd_op_t op;
+};
+
+struct cluster_op_t
+{
+    uint64_t opcode; // OSD_OP_READ, OSD_OP_WRITE, OSD_OP_SYNC
+    uint64_t inode;
+    uint64_t offset;
+    uint64_t len;
+    int retval;
+    void *buf;
+    std::function<void(cluster_op_t*)> callback;
+protected:
+    bool needs_reslice = false;
+    int sent_count = 0, done_count = 0;
+    std::vector<cluster_op_part_t> parts;
+    friend class cluster_client_t;
+};
+
+class cluster_client_t
+{
+    timerfd_manager_t *tfd;
+    ring_loop_t *ringloop;
+
+    uint64_t pg_part_count = 2;
+    uint64_t pg_stripe_size = 0;
+    uint64_t bs_block_size = 0;
+    uint64_t bs_disk_alignment = 0;
+    uint64_t bs_bitmap_granularity = 0;
+    uint64_t pg_count = 0;
+    bool immediate_commit = false;
+    bool inmemory_commit = false;
+    uint64_t inmemory_dirty_limit = 32*1024*1024;
+    int log_level;
+
+    uint64_t op_id = 1;
+    etcd_state_client_t st_cli;
+    osd_messenger_t msgr;
+    std::set<cluster_op_t*> sent_ops, unsent_ops;
+    // unsynced operations are copied in memory to allow replay when cluster isn't in the immediate_commit mode
+    std::vector<cluster_op_t*> unsynced_ops;
+    uint64_t unsynced_bytes = 0;
+
+public:
+    cluster_client_t(ring_loop_t *ringloop, timerfd_manager_t *tfd, json11::Json & config);
+    void execute(cluster_op_t *op);
+
+protected:
+    void continue_ops();
+    void on_load_config_hook(json11::Json::object & cfg);
+    void on_load_pgs_hook(bool success);
+    void on_change_hook(json11::Json::object & changes);
+    void on_change_osd_state_hook(uint64_t peer_osd);
+    bool try_send(cluster_op_t *op, cluster_op_part_t *part);
+    void handle_op_part(cluster_op_part_t *part);
+};

copy-fio-includes.sh

@@ -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

copy-qemu-includes.sh

@@ -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

cpp-btree

@@ -1 +0,0 @@
-Subproject commit 45e6d1f13196a0824e2089a586c53b9de0283f17

crc32c.h

@@ -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

csi/.dockerignore

@@ -1,2 +0,0 @@
-vitastor-csi
-Dockerfile

csi/Dockerfile

@@ -1,32 +0,0 @@
-# Compile stage
-FROM golang:buster AS build
-
-ADD go.sum go.mod /app/
-RUN cd /app; CGO_ENABLED=1 GOOS=linux GOARCH=amd64 go mod download -x
-ADD . /app
-RUN perl -i -e '$/ = undef; while(<>) { s/\n\s*(\{\s*\n)/$1\n/g; s/\}(\s*\n\s*)else\b/$1} else/g; print; }' `find /app -name '*.go'`
-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"]

csi/Makefile

@@ -1,9 +0,0 @@
-VERSION ?= v0.6.17
-
-all: build push
-
-build:
-	@docker build --rm -t vitalif/vitastor-csi:$(VERSION) .
-
-push:
-	@docker push vitalif/vitastor-csi:$(VERSION)

csi/deploy/000-csi-namespace.yaml

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

csi/deploy/001-csi-config-map.yaml

@@ -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

csi/deploy/002-csi-nodeplugin-rbac.yaml

@@ -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

csi/deploy/003-csi-nodeplugin-psp.yaml

@@ -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

csi/deploy/004-csi-nodeplugin.yaml

@@ -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:v0.6.17
-          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

csi/deploy/005-csi-provisioner-rbac.yaml

@@ -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

csi/deploy/006-csi-provisioner-psp.yaml

@@ -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

csi/deploy/007-csi-provisioner.yaml

@@ -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:v0.6.17
-          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

csi/deploy/008-csi-driver.yaml

@@ -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

csi/deploy/009-storage-class.yaml

@@ -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"

csi/deploy/example-pvc-block.yaml

@@ -1,13 +0,0 @@
----
-apiVersion: v1
-kind: PersistentVolumeClaim
-metadata:
-  name: test-vitastor-pvc-block
-spec:
-  storageClassName: vitastor
-  volumeMode: Block
-  accessModes:
-    - ReadWriteMany
-  resources:
-    requests:
-      storage: 10Gi

csi/deploy/example-pvc.yaml

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

csi/deploy/example-test-pod-block.yaml

@@ -1,17 +0,0 @@
-apiVersion: v1
-kind: Pod
-metadata:
-  name: vitastor-test-block-pvc
-  namespace: default
-spec:
-  containers:
-  - name: vitastor-test-block-pvc
-    image: nginx
-    volumeDevices:
-      - name: data
-        devicePath: /dev/xvda
-  volumes:
-  - name: data
-    persistentVolumeClaim:
-      claimName: test-vitastor-pvc-block
-      readOnly: false

csi/deploy/example-test-pod.yaml

@@ -1,17 +0,0 @@
-apiVersion: v1
-kind: Pod
-metadata:
-  name: vitastor-test-nginx
-  namespace: default
-spec:
-  containers:
-   - name: vitastor-test-nginx
-     image: nginx
-     volumeMounts:
-       - mountPath: /usr/share/nginx/html/s3
-         name: data
-  volumes:
-   - name: data
-     persistentVolumeClaim:
-       claimName: test-vitastor-pvc
-       readOnly: false

csi/go.mod

@@ -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

csi/go.sum

@@ -1,448 +0,0 @@
-cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
-cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU=
-cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU=
-cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY=
-cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc=
-cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0=
-cloud.google.com/go v0.51.0/go.mod h1:hWtGJ6gnXH+KgDv+V0zFGDvpi07n3z8ZNj3T1RW0Gcw=
-cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o=
-cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7TKLgZqpHYE=
-cloud.google.com/go/pubsub v1.0.1/go.mod h1:R0Gpsv3s54REJCy4fxDixWD93lHJMoZTyQ2kNxGRt3I=
-cloud.google.com/go/storage v1.0.0/go.mod h1:IhtSnM/ZTZV8YYJWCY8RULGVqBDmpoyjwiyrjsg+URw=
-dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
-github.com/Azure/go-ansiterm v0.0.0-20170929234023-d6e3b3328b78/go.mod h1:LmzpDX56iTiv29bbRTIsUNlaFfuhWRQBWjQdVyAevI8=
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csi/src/config.go

@@ -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 = "0.6.17"
-)
-
-// 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{}
-}

csi/src/controllerserver.go

@@ -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-cli
-    args := []string{
-        "rm-data", "--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-cli", args...)
-    var stderr bytes.Buffer
-    c.Stdout = nil
-    c.Stderr = &stderr
-    err = c.Run()
-    stderrStr := string(stderr.Bytes())
-    if (err != nil)
-    {
-        klog.Errorf("vitastor-cli rm-data 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, "")
-}

csi/src/grpc.go

@@ -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
-}

csi/src/identityserver.go

@@ -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
-}

csi/src/nodeserver.go

@@ -1,293 +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()
-    isBlock := req.GetVolumeCapability().GetBlock() != nil
-
-    // Check that it's not already mounted
-    _, error := mount.IsNotMountPoint(ns.mounter, targetPath)
-    if (error != nil)
-    {
-        if (os.IsNotExist(error))
-        {
-            if (isBlock)
-            {
-                pathFile, err := os.OpenFile(targetPath, os.O_CREATE|os.O_RDWR, 0o600)
-                if (err != nil)
-                {
-                    klog.Errorf("failed to create block device mount target %s with error: %v", targetPath, err)
-                    return nil, status.Error(codes.Internal, err.Error())
-                }
-                err = pathFile.Close()
-                if (err != nil)
-                {
-                    klog.Errorf("failed to close %s with error: %v", targetPath, err)
-                    return nil, status.Error(codes.Internal, err.Error())
-                }
-            }
-            else
-            {
-                err := os.MkdirAll(targetPath, 0777)
-                if (err != nil)
-                {
-                    klog.Errorf("failed to create fs mount target %s with error: %v", targetPath, err)
-                    return nil, status.Error(codes.Internal, err.Error())
-                }
-            }
-        }
-        else
-        {
-            return nil, status.Error(codes.Internal, error.Error())
-        }
-    }
-
-    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()
-    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
-}

csi/src/server.go

@@ -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()
-}

csi/vitastor-csi.go

@@ -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()
-}

debian/build-vitastor-bullseye.sh

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

debian/build-vitastor-buster.sh

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

debian/changelog

@@ -1,27 +0,0 @@
-vitastor (0.6.17-1) 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

debian/compat

@@ -1 +0,0 @@
-13

debian/control

@@ -1,55 +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: vitastor-osd, vitastor-mon, vitastor-client, vitastor-client-dev, vitastor-fio
-Description: Vitastor, a fast software-defined clustered block storage
- Vitastor is a small, simple and fast clustered block storage (storage for VM drives),
- architecturally similar to Ceph which means strong consistency, primary-replication,
- symmetric clustering and automatic data distribution over any number of drives of any
- size with configurable redundancy (replication or erasure codes/XOR).
-
-Package: vitastor-osd
-Architecture: amd64
-Depends: ${shlibs:Depends}, ${misc:Depends}, vitastor-client (= ${binary:Version})
-Description: Vitastor, a fast software-defined clustered block storage - object storage daemon
- Vitastor object storage daemon, i.e. server program that stores data.
-
-Package: vitastor-mon
-Architecture: amd64
-Depends: ${misc:Depends}, nodejs (>= 10), node-sprintf-js, node-ws (>= 7), lp-solve
-Description: Vitastor, a fast software-defined clustered block storage - monitor
- Vitastor monitor, i.e. server program responsible for watching cluster state and
- scheduling cluster-level operations.
-
-Package: vitastor-client
-Architecture: amd64
-Depends: ${shlibs:Depends}, ${misc:Depends}
-Description: Vitastor, a fast software-defined clustered block storage - client
- Vitastor client library and command-line interface.
-
-Package: vitastor-client-dev
-Section: devel
-Architecture: amd64
-Depends: ${misc:Depends}, vitastor-client (= ${binary:Version})
-Description: Vitastor, a fast software-defined clustered block storage - development files
- Vitastor library headers for development.
-
-Package: vitastor-fio
-Architecture: amd64
-Depends: ${shlibs:Depends}, ${misc:Depends}, vitastor-client (= ${binary:Version}), fio (= ${dep:fio})
-Description: Vitastor, a fast software-defined clustered block storage - fio drivers
- Vitastor fio drivers for benchmarking.
-
-Package: pve-storage-vitastor
-Architecture: amd64
-Depends: ${shlibs:Depends}, ${misc:Depends}, vitastor-client (= ${binary:Version})
-Description: Vitastor Proxmox Virtual Environment storage plugin
- Vitastor storage plugin for Proxmox Virtual Environment.

debian/copyright

@@ -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.

debian/fio_version

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

debian/install

@@ -1,4 +0,0 @@
-VNPL-1.1.txt usr/share/doc/vitastor
-GPL-2.0.txt usr/share/doc/vitastor
-README.md usr/share/doc/vitastor
-README-ru.md usr/share/doc/vitastor

debian/libvirt.Dockerfile

@@ -1,40 +0,0 @@
-# Build patched libvirt for Debian Buster or Bullseye/Sid inside a container
-# cd ..; podman build --build-arg REL=bullseye -v `pwd`/packages:/root/packages -f debian/libvirt.Dockerfile .
-
-ARG REL=
-FROM debian:$REL
-ARG REL=
-
-WORKDIR /root
-
-RUN if [ "$REL" = "buster" -o "$REL" = "bullseye" ]; then \
-        echo "deb http://deb.debian.org/debian $REL-backports main" >> /etc/apt/sources.list; \
-        echo >> /etc/apt/preferences; \
-        echo 'Package: *' >> /etc/apt/preferences; \
-        echo "Pin: release a=$REL-backports" >> /etc/apt/preferences; \
-        echo 'Pin-Priority: 500' >> /etc/apt/preferences; \
-    fi; \
-    grep '^deb ' /etc/apt/sources.list | perl -pe 's/^deb/deb-src/' >> /etc/apt/sources.list; \
-    echo 'APT::Install-Recommends false;' >> /etc/apt/apt.conf; \
-    echo 'APT::Install-Suggests false;' >> /etc/apt/apt.conf
-
-RUN apt-get update; apt-get -y install devscripts
-RUN apt-get -y build-dep libvirt0
-RUN apt-get -y install libglusterfs-dev
-RUN apt-get --download-only source libvirt
-
-ADD patches/libvirt-5.0-vitastor.diff patches/libvirt-7.0-vitastor.diff patches/libvirt-7.5-vitastor.diff patches/libvirt-7.6-vitastor.diff /root
-RUN set -e; \
-    mkdir -p /root/packages/libvirt-$REL; \
-    rm -rf /root/packages/libvirt-$REL/*; \
-    cd /root/packages/libvirt-$REL; \
-    dpkg-source -x /root/libvirt*.dsc; \
-    D=$(ls -d libvirt-*/); \
-    V=$(ls -d libvirt-*/ | perl -pe 's/libvirt-(\d+\.\d+).*/$1/'); \
-    cp /root/libvirt-$V-vitastor.diff $D/debian/patches; \
-    echo libvirt-$V-vitastor.diff >> $D/debian/patches/series; \
-    cd $D; \
-    V=$(head -n1 debian/changelog | perl -pe 's/^.*\((.*?)(~bpo[\d\+]*)?(\+deb[u\d]+)?\).*$/$1/')+vitastor2; \
-    DEBEMAIL="Vitaliy Filippov <vitalif@yourcmc.ru>" dch -D $REL -v $V 'Add Vitastor support'; \
-    DEB_BUILD_OPTIONS=nocheck dpkg-buildpackage --jobs=auto -sa; \
-    rm -rf /root/packages/libvirt-$REL/$D

debian/patched-qemu.Dockerfile

@@ -1,61 +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 .
-
-ARG REL=
-FROM debian:$REL
-ARG REL=
-
-WORKDIR /root
-
-RUN if [ "$REL" = "buster" -o "$REL" = "bullseye" ]; then \
-        echo "deb http://deb.debian.org/debian $REL-backports main" >> /etc/apt/sources.list; \
-        echo >> /etc/apt/preferences; \
-        echo 'Package: *' >> /etc/apt/preferences; \
-        echo "Pin: release a=$REL-backports" >> /etc/apt/preferences; \
-        echo 'Pin-Priority: 500' >> /etc/apt/preferences; \
-    fi; \
-    grep '^deb ' /etc/apt/sources.list | perl -pe 's/^deb/deb-src/' >> /etc/apt/sources.list; \
-    echo 'APT::Install-Recommends false;' >> /etc/apt/apt.conf; \
-    echo 'APT::Install-Suggests false;' >> /etc/apt/apt.conf
-
-RUN apt-get update
-RUN apt-get -y install qemu fio liburing1 liburing-dev libgoogle-perftools-dev devscripts
-RUN apt-get -y build-dep qemu
-# To build a custom version
-#RUN cp /root/packages/qemu-orig/* /root
-RUN apt-get --download-only source qemu
-
-ADD patches/qemu-5.0-vitastor.patch patches/qemu-5.1-vitastor.patch patches/qemu-6.1-vitastor.patch src/qemu_driver.c /root/vitastor/patches/
-RUN set -e; \
-    apt-get install -y wget; \
-    wget -q -O /etc/apt/trusted.gpg.d/vitastor.gpg https://vitastor.io/debian/pubkey.gpg; \
-    (echo deb http://vitastor.io/debian $REL main > /etc/apt/sources.list.d/vitastor.list); \
-    (echo "APT::Install-Recommends false;" > /etc/apt/apt.conf) && \
-    apt-get update; \
-    apt-get install -y vitastor-client vitastor-client-dev quilt; \
-    mkdir -p /root/packages/qemu-$REL; \
-    rm -rf /root/packages/qemu-$REL/*; \
-    cd /root/packages/qemu-$REL; \
-    dpkg-source -x /root/qemu*.dsc; \
-    if ls -d /root/packages/qemu-$REL/qemu-5.0*; then \
-        D=$(ls -d /root/packages/qemu-$REL/qemu-5.0*); \
-        cp /root/vitastor/patches/qemu-5.0-vitastor.patch $D/debian/patches; \
-        echo qemu-5.0-vitastor.patch >> $D/debian/patches/series; \
-    elif ls /root/packages/qemu-$REL/qemu-6.1*; then \
-        D=$(ls -d /root/packages/qemu-$REL/qemu-6.1*); \
-        cp /root/vitastor/patches/qemu-6.1-vitastor.patch $D/debian/patches; \
-        echo qemu-6.1-vitastor.patch >> $D/debian/patches/series; \
-    else \
-        cp /root/vitastor/patches/qemu-5.1-vitastor.patch /root/packages/qemu-$REL/qemu-*/debian/patches; \
-        P=`ls -d /root/packages/qemu-$REL/qemu-*/debian/patches`; \
-        echo qemu-5.1-vitastor.patch >> $P/series; \
-    fi; \
-    cd /root/packages/qemu-$REL/qemu-*/; \
-    quilt push -a; \
-    quilt add block/vitastor.c; \
-    cp /root/vitastor/patches/qemu_driver.c block/vitastor.c; \
-    quilt refresh; \
-    V=$(head -n1 debian/changelog | perl -pe 's/^.*\((.*?)(~bpo[\d\+]*)?\).*$/$1/')+vitastor1; \
-    DEBEMAIL="Vitaliy Filippov <vitalif@yourcmc.ru>" dch -D $REL -v $V 'Plug Vitastor block driver'; \
-    DEB_BUILD_OPTIONS=nocheck dpkg-buildpackage --jobs=auto -sa; \
-    rm -rf /root/packages/qemu-$REL/qemu-*/

debian/pve-storage-vitastor.install

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

debian/raw.h

@@ -1,19 +0,0 @@
-/* Removed in Linux 5.14 */
-
-/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
-#ifndef __LINUX_RAW_H
-#define __LINUX_RAW_H
-
-#include <linux/types.h>
-
-#define RAW_SETBIND	_IO( 0xac, 0 )
-#define RAW_GETBIND	_IO( 0xac, 1 )
-
-struct raw_config_request 
-{
-	int	raw_minor;
-	__u64	block_major;
-	__u64	block_minor;
-};
-
-#endif /* __LINUX_RAW_H */

debian/rules

@@ -1,10 +0,0 @@
-#!/usr/bin/make -f
-export DH_VERBOSE = 1
-
-%:
-	dh $@
-
-override_dh_installdeb:
-	cat debian/fio_version >> debian/vitastor-fio.substvars
-	[ -f debian/qemu_version ] && (cat debian/qemu_version >> debian/vitastor-qemu.substvars) || true
-	dh_installdeb

debian/source/format

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

debian/vitastor-client-dev.install

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

debian/vitastor-client.install

@@ -1,7 +0,0 @@
-usr/bin/vita
-usr/bin/vitastor-cli
-usr/bin/vitastor-rm
-usr/bin/vitastor-nbd
-usr/bin/vitastor-nfs
-usr/lib/*/libvitastor*.so*
-mon/make-osd.sh /usr/lib/vitastor

debian/vitastor-fio.install

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

debian/vitastor-mon.install

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

debian/vitastor-osd.install

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

debian/vitastor.Dockerfile

@@ -1,55 +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 .
-
-ARG REL=
-FROM debian:$REL
-ARG REL=
-
-WORKDIR /root
-
-RUN if [ "$REL" = "buster" -o "$REL" = "bullseye" ]; then \
-        echo "deb http://deb.debian.org/debian $REL-backports main" >> /etc/apt/sources.list; \
-        echo >> /etc/apt/preferences; \
-        echo 'Package: *' >> /etc/apt/preferences; \
-        echo "Pin: release a=$REL-backports" >> /etc/apt/preferences; \
-        echo 'Pin-Priority: 500' >> /etc/apt/preferences; \
-    fi; \
-    grep '^deb ' /etc/apt/sources.list | perl -pe 's/^deb/deb-src/' >> /etc/apt/sources.list; \
-    echo 'APT::Install-Recommends false;' >> /etc/apt/apt.conf; \
-    echo 'APT::Install-Suggests false;' >> /etc/apt/apt.conf
-
-RUN apt-get update
-RUN apt-get -y install fio liburing1 liburing-dev libgoogle-perftools-dev devscripts
-RUN apt-get -y build-dep fio
-RUN apt-get --download-only source 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; \
-    mkdir -p /root/packages/vitastor-$REL; \
-    rm -rf /root/packages/vitastor-$REL/*; \
-    cd /root/packages/vitastor-$REL; \
-    cp -r /root/vitastor vitastor-0.6.17; \
-    cd vitastor-0.6.17; \
-    ln -s /root/fio-build/fio-*/ ./fio; \
-    FIO=$(head -n1 fio/debian/changelog | perl -pe 's/^.*\((.*?)\).*$/$1/'); \
-    ls /usr/include/linux/raw.h || cp ./debian/raw.h /usr/include/linux/raw.h; \
-    sh copy-fio-includes.sh; \
-    rm fio; \
-    mkdir -p a b debian/patches; \
-    mv fio-copy b/fio; \
-    diff -NaurpbB a b > debian/patches/fio-headers.patch || true; \
-    echo fio-headers.patch >> debian/patches/series; \
-    rm -rf a b; \
-    echo "dep:fio=$FIO" > debian/fio_version; \
-    cd /root/packages/vitastor-$REL; \
-    tar --sort=name --mtime='2020-01-01' --owner=0 --group=0 --exclude=debian -cJf vitastor_0.6.17.orig.tar.xz vitastor-0.6.17; \
-    cd vitastor-0.6.17; \
-    V=$(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-*/

docker/Dockerfile

@@ -1,9 +0,0 @@
-# Build Docker image with Vitastor packages
-
-FROM debian:bullseye
-
-ADD vitastor.list /etc/apt/sources.list.d
-ADD vitastor.gpg /etc/apt/trusted.gpg.d
-ADD vitastor.pref /etc/apt/preferences.d
-ADD apt.conf /etc/apt/
-RUN apt-get update && apt-get -y install vitastor qemu-system-x86 qemu-system-common && apt-get clean

docker/apt.conf

@@ -1 +0,0 @@
-APT::Install-Recommends false;

docker/vitastor.list

@@ -1 +0,0 @@
-deb http://vitastor.io/debian bullseye main

docker/vitastor.pref

@@ -1,3 +0,0 @@
-Package: *
-Pin: origin "vitastor.io"
-Pin-Priority: 1000

docs/config.en.md

@@ -1,37 +0,0 @@
-[Documentation](../README.md#documentation) → Configuration Reference
-
------
-
-[Читать на русском](config.ru.md)
-
-# Configuration Reference
-
-Vitastor configuration consists of:
-- [Configuration parameters (key-value)](#parameter-reference)
-- [Pool configuration](config/pool.en.md)
-- [OSD placement tree configuration](config/pool.en.md#placement-tree)
-- [Separate OSD settings](config/pool.en.md#osd-settings)
-- [Inode configuration](config/inode.en.md) i.e. image metadata like name, size and parent reference
-
-Configuration parameters can be set in 3 places:
-- Configuration file (`/etc/vitastor/vitastor.conf` or other path)
-- etcd key `/vitastor/config/global`. Most variables can be set there, but etcd
-  connection parameters should obviously be set in the configuration file.
-- Command line of Vitastor components: OSD, mon, fio and QEMU options,
-  OpenStack/Proxmox/etc configuration. The latter doesn't allow to set all
-  variables directly, but it allows to override the configuration file and
-  set everything you need inside it.
-
-In the future, additional configuration methods may be added:
-- OSD superblock which will, by design, contain parameters related to the disk
-  layout and to one specific OSD.
-- OSD-specific keys in etcd like `/vitastor/config/osd/<number>`.
-
-## Parameter Reference
-
-- [Common](config/common.en.md)
-- [Network](config/network.en.md)
-- [Global Disk Layout](config/layout-cluster.en.md)
-- [OSD Disk Layout](config/layout-osd.en.md)
-- [OSD Runtime Parameters](config/osd.en.md)
-- [Monitor](config/monitor.en.md)

docs/config.ru.md

@@ -1,39 +0,0 @@
-[Документация](../README-ru.md#документация) → Конфигурация Vitastor
-
------
-
-[Read in English](config.en.md)
-
-# Конфигурация Vitastor
-
-Конфигурация Vitastor состоит из:
-- [Параметров (ключ-значение)](#список-параметров)
-- [Настроек пулов](config/pool.ru.md)
-- [Настроек дерева OSD](config/pool.ru.md#дерево-размещения)
-- [Настроек отдельных OSD](config/pool.ru.md#настройки-osd)
-- [Настроек инодов](config/inode.ru.md), т.е. метаданных образов, таких, как имя, размер и ссылки на
-  родительский образ
-
-Параметры конфигурации могут задаваться в 3 местах:
-- Файле конфигурации (`/etc/vitastor/vitastor.conf` или по другому пути)
-- Ключе в etcd `/vitastor/config/global`. Большая часть параметров может
-  задаваться там, кроме, естественно, самих параметров соединения с etcd,
-  которые должны задаваться в файле конфигурации
-- В командной строке компонентов Vitastor: OSD, монитора, опциях fio и QEMU,
-  настроек OpenStack, Proxmox и т.п. Последние, как правило, не включают полный
-  набор параметров напрямую, но разрешают определить путь к файлу конфигурации
-  и задать любые параметры в нём.
-
-В будущем также могут быть добавлены другие способы конфигурации:
-- Суперблок OSD, в котором будут храниться параметры OSD, связанные с дисковым
-  форматом и с этим конкретным OSD.
-- OSD-специфичные ключи в etcd типа `/vitastor/config/osd/<номер>`.
-
-## Список параметров
-
-- [Общие](config/common.ru.md)
-- [Сеть](config/network.ru.md)
-- [Глобальные дисковые параметры](config/layout-cluster.ru.md)
-- [Дисковые параметры OSD](config/layout-osd.ru.md)
-- [Прочие параметры OSD](config/osd.ru.md)
-- [Параметры мониторов](config/monitor.ru.md)

docs/config/common.en.md

@@ -1,46 +0,0 @@
-[Documentation](../../README.md#documentation) → [Configuration](../config.en.md) → Common Parameters
-
------
-
-[Читать на русском](common.ru.md)
-
-# Common Parameters
-
-These are the most common parameters which apply to all components of Vitastor.
-
-- [config_path](#config_path)
-- [etcd_address](#etcd_address)
-- [etcd_prefix](#etcd_prefix)
-- [log_level](#log_level)
-
-## config_path
-
-- Type: string
-- Default: /etc/vitastor/vitastor.conf
-
-Path to the JSON configuration file. Configuration file is optional,
-a non-existing configuration file does not prevent Vitastor from
-running if required parameters are specified.
-
-## etcd_address
-
-- Type: string or array of strings
-
-etcd connection endpoint(s). Multiple endpoints may be delimited by "," or
-specified in a JSON array `["10.0.115.10:2379/v3","10.0.115.11:2379/v3"]`.
-Note that https is not supported for etcd connections yet.
-
-## etcd_prefix
-
-- Type: string
-- Default: /vitastor
-
-Prefix for all keys in etcd used by Vitastor. You can change prefix and, for
-example, use a single etcd cluster for multiple Vitastor clusters.
-
-## log_level
-
-- Type: integer
-- Default: 0
-
-Log level. Raise if you want more verbose output.

docs/config/common.ru.md

@@ -1,45 +0,0 @@
-[Документация](../../README-ru.md#документация) → [Конфигурация](../config.ru.md) → Общие параметры
-
------
-
-[Read in English](common.en.md)
-
-# Общие параметры
-
-Это наиболее общие параметры, используемые всеми компонентами Vitastor.
-
-- [config_path](#config_path)
-- [etcd_address](#etcd_address)
-- [etcd_prefix](#etcd_prefix)
-- [log_level](#log_level)
-
-## config_path
-
-- Тип: строка
-- Значение по умолчанию: /etc/vitastor/vitastor.conf
-
-Путь к файлу конфигурации в формате JSON. Файл конфигурации необязателен,
-без него Vitastor тоже будет работать, если переданы необходимые параметры.
-
-## etcd_address
-
-- Тип: строка или массив строк
-
-Адрес(а) подключения к etcd. Несколько адресов могут разделяться запятой
-или указываться в виде JSON-массива `["10.0.115.10:2379/v3","10.0.115.11:2379/v3"]`.
-
-## etcd_prefix
-
-- Тип: строка
-- Значение по умолчанию: /vitastor
-
-Префикс для ключей etcd, которые использует Vitastor. Вы можете задать другой
-префикс, например, чтобы запустить несколько кластеров Vitastor с одним
-кластером etcd.
-
-## log_level
-
-- Тип: целое число
-- Значение по умолчанию: 0
-
-Уровень логгирования. Повысьте, если хотите более подробный вывод.

docs/config/inode.en.md

@@ -1,32 +0,0 @@
-[Documentation](../../README.md#documentation) → [Configuration](../config.en.md) → Image metadata in etcd
-
------
-
-[Читать на русском](inode.ru.md)
-
-# Image metadata in etcd
-
-Image list is stored in etcd in `/vitastor/config/inode/<pool>/<inode>` keys.
-
-You can even create images manually:
-
-```
-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.
-
-vitastor-cli, K8s, OpenStack and other drivers also store the reverse mapping in `/vitastor/index/image/<name>` keys
-in JSON format: `{"id":<inode>,"pool_id":<pool>}` and ID counters in `/vitastor/index/maxid/<pool>` as numbers
-to simplify ID generation.

docs/config/inode.ru.md

@@ -1,34 +0,0 @@
-[Документация](../../README-ru.md#документация) → [Конфигурация](../config.ru.md) → Метаданные образов в etcd
-
------
-
-[Read in English](inode.en.md)
-
-# Метаданные образов в etcd
-
-Список образов хранится в etcd в ключах `/vitastor/config/inode/<pool>/<inode>`.
-
-Вы можете даже создавать образы вручную:
-
-```
-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.
-
-vitastor-cli и драйвера K8s, OpenStack и т.п. также хранят обратный маппинг в ключах `/vitastor/index/image/<name>`
-в JSON-формате: `{"id":<inode>,"pool_id":<pool>}` и счётчики ID `/vitastor/index/maxid/<pool>` в виде просто чисел
-для упрощения генерации ID новых образов.

docs/config/layout-cluster.en.md

@@ -1,124 +0,0 @@
-[Documentation](../../README.md#documentation) → [Configuration](../config.en.md) → Cluster-Wide Disk Layout Parameters
-
------
-
-[Читать на русском](layout-cluster.ru.md)
-
-# Cluster-Wide Disk Layout Parameters
-
-These parameters apply to clients and OSDs, are fixed at the moment of OSD drive
-initialization and can't be changed after it without losing data.
-
-- [block_size](#block_size)
-- [bitmap_granularity](#bitmap_granularity)
-- [immediate_commit](#immediate_commit)
-- [client_dirty_limit](#client_dirty_limit)
-
-## block_size
-
-- Type: integer
-- Default: 131072
-
-Size of objects (data blocks) into which all physical and virtual drives are
-subdivided in Vitastor. One of current main settings in Vitastor, affects
-memory usage, write amplification and I/O load distribution effectiveness.
-
-Recommended default block size is 128 KB for SSD and 4 MB for HDD. In fact,
-it's possible to use 4 MB for SSD too - it will lower memory usage, but
-may increase average WA and reduce linear performance.
-
-OSDs with different block sizes (for example, SSD and SSD+HDD OSDs) can
-currently coexist in one etcd instance only within separate Vitastor
-clusters with different etcd_prefix'es.
-
-Also block size can't be changed after OSD initialization without losing
-data.
-
-You must always specify block_size in etcd in /vitastor/config/global if
-you change it so all clients can know about it.
-
-OSD memory usage is roughly (SIZE / BLOCK * 68 bytes) which is roughly
-544 MB per 1 TB of used disk space with the default 128 KB block size.
-
-## bitmap_granularity
-
-- Type: integer
-- Default: 4096
-
-Required virtual disk write alignment ("sector size"). Must be a multiple
-of disk_alignment. It's called bitmap granularity because Vitastor tracks
-an allocation bitmap for each object containing 2 bits per each
-(bitmap_granularity) bytes.
-
-This parameter can't be changed after OSD initialization without losing
-data. Also it's fixed for the whole Vitastor cluster i.e. two different
-values can't be used in a single Vitastor cluster.
-
-Clients MUST be aware of this parameter value, so put it into etcd key
-/vitastor/config/global if you change it for any reason.
-
-## immediate_commit
-
-- Type: string
-- Default: false
-
-Another parameter which is really important for performance.
-
-Desktop SSDs are very fast (100000+ iops) for simple random writes
-without cache flush. However, they are really slow (only around 1000 iops)
-if you try to fsync() each write, that is, when you want to guarantee that
-each change gets immediately persisted to the physical media.
-
-Server-grade SSDs with "Advanced/Enhanced Power Loss Protection" or with
-"Supercapacitor-based Power Loss Protection", on the other hand, are equally
-fast with and without fsync because their cache is protected from sudden
-power loss by a built-in supercapacitor-based "UPS".
-
-Some software-defined storage systems always fsync each write and thus are
-really slow when used with desktop SSDs. Vitastor, however, can also
-efficiently utilize desktop SSDs by postponing fsync until the client calls
-it explicitly.
-
-This is what this parameter regulates. When it's set to "all" the whole
-Vitastor cluster commits each change to disks immediately and clients just
-ignore fsyncs because they know for sure that they're unneeded. This reduces
-the amount of network roundtrips performed by clients and improves
-performance. So it's always better to use server grade SSDs with
-supercapacitors even with Vitastor, especially given that they cost only
-a bit more than desktop models.
-
-There is also a common SATA SSD (and HDD too!) firmware bug (or feature)
-that makes server SSDs which have supercapacitors slow with fsync. To check
-if your SSDs are affected, compare benchmark results from `fio -name=test
--ioengine=libaio -direct=1 -bs=4k -rw=randwrite -iodepth=1` with and without
-`-fsync=1`. Results should be the same. If fsync=1 result is worse you can
-try to work around this bug by "disabling" drive write-back cache by running
-`hdparm -W 0 /dev/sdXX` or `echo write through > /sys/block/sdXX/device/scsi_disk/*/cache_type`
-(IMPORTANT: don't mistake it with `/sys/block/sdXX/queue/write_cache` - it's
-unsafe to change by hand). The same may apply to newer HDDs with internal
-SSD cache or "media-cache" - for example, a lot of Seagate EXOS drives have
-it (they have internal SSD cache even though it's not stated in datasheets).
-
-This parameter must be set both in etcd in /vitastor/config/global and in
-OSD command line or configuration. Setting it to "all" or "small" requires
-enabling disable_journal_fsync and disable_meta_fsync, setting it to "all"
-also requires enabling disable_data_fsync.
-
-TLDR: For optimal performance, set immediate_commit to "all" if you only use
-SSDs with supercapacitor-based power loss protection (nonvolatile
-write-through cache) for both data and journals in the whole Vitastor
-cluster. Set it to "small" if you only use such SSDs for journals. Leave
-empty if your drives have write-back cache.
-
-## client_dirty_limit
-
-- Type: integer
-- Default: 33554432
-
-Without immediate_commit=all this parameter sets the limit of "dirty"
-(not committed by fsync) data allowed by the client before forcing an
-additional fsync and committing the data. Also note that the client always
-holds a copy of uncommitted data in memory so this setting also affects
-RAM usage of clients.
-
-This parameter doesn't affect OSDs themselves.

docs/config/layout-cluster.ru.md

@@ -1,134 +0,0 @@
-[Документация](../../README-ru.md#документация) → [Конфигурация](../config.ru.md) → Дисковые параметры уровня кластера
-
------
-
-[Read in English](layout-cluster.en.md)
-
-# Дисковые параметры уровня кластера
-
-Данные параметры используются клиентами и OSD, задаются в момент инициализации
-диска OSD и не могут быть изменены после этого без потери данных.
-
-- [block_size](#block_size)
-- [bitmap_granularity](#bitmap_granularity)
-- [immediate_commit](#immediate_commit)
-- [client_dirty_limit](#client_dirty_limit)
-
-## block_size
-
-- Тип: целое число
-- Значение по умолчанию: 131072
-
-Размер объектов (блоков данных), на которые делятся физические и виртуальные
-диски в Vitastor. Одна из ключевых на данный момент настроек, влияет на
-потребление памяти, объём избыточной записи (write amplification) и
-эффективность распределения нагрузки по OSD.
-
-Рекомендуемые по умолчанию размеры блока - 128 килобайт для SSD и 4
-мегабайта для HDD. В принципе, для SSD можно тоже использовать 4 мегабайта,
-это понизит использование памяти, но ухудшит распределение нагрузки и в
-среднем увеличит WA.
-
-OSD с разными размерами блока (например, SSD и SSD+HDD OSD) на данный
-момент могут сосуществовать в рамках одного etcd только в виде двух независимых
-кластеров Vitastor с разными etcd_prefix.
-
-Также размер блока нельзя менять после инициализации OSD без потери данных.
-
-Если вы меняете размер блока, обязательно прописывайте его в etcd в
-/vitastor/config/global, дабы все клиенты его знали.
-
-Потребление памяти OSD составляет примерно (РАЗМЕР / БЛОК * 68 байт),
-т.е. примерно 544 МБ памяти на 1 ТБ занятого места на диске при
-стандартном 128 КБ блоке.
-
-## bitmap_granularity
-
-- Тип: целое число
-- Значение по умолчанию: 4096
-
-Требуемое выравнивание записи на виртуальные диски (размер их "сектора").
-Должен быть кратен disk_alignment. Называется гранулярностью битовой карты
-потому, что Vitastor хранит битовую карту для каждого объекта, содержащую
-по 2 бита на каждые (bitmap_granularity) байт.
-
-Данный параметр нельзя менять после инициализации OSD без потери данных.
-Также он фиксирован для всего кластера Vitastor, т.е. разные значения
-не могут сосуществовать в одном кластере.
-
-Клиенты ДОЛЖНЫ знать правильное значение этого параметра, так что если вы
-его меняете, обязательно прописывайте изменённое значение в etcd в ключ
-/vitastor/config/global.
-
-## immediate_commit
-
-- Тип: строка
-- Значение по умолчанию: false
-
-Ещё один важный для производительности параметр.
-
-Модели SSD для настольных компьютеров очень быстрые (100000+ операций в
-секунду) при простой случайной записи без сбросов кэша. Однако они очень
-медленные (всего порядка 1000 iops), если вы пытаетесь сбрасывать кэш после
-каждой записи, то есть, если вы пытаетесь гарантировать, что каждое
-изменение физически записывается в энергонезависимую память.
-
-С другой стороны, серверные SSD с конденсаторами - функцией, называемой
-"Advanced/Enhanced Power Loss Protection" или просто "Supercapacitor-based
-Power Loss Protection" - одинаково быстрые и со сбросом кэша, и без
-него, потому что их кэш защищён от потери питания встроенным "источником
-бесперебойного питания" на основе суперконденсаторов и на самом деле они
-его никогда не сбрасывают.
-
-Некоторые программные СХД всегда сбрасывают кэши дисков при каждой записи
-и поэтому работают очень медленно с настольными SSD. Vitastor, однако, может
-откладывать fsync до явного его вызова со стороны клиента и таким образом
-эффективно утилизировать настольные SSD.
-
-Данный параметр влияет как раз на это. Когда он установлен в значение "all",
-весь кластер Vitastor мгновенно фиксирует каждое изменение на физические
-носители и клиенты могут просто игнорировать запросы fsync, т.к. они точно
-знают, что fsync-и не нужны. Это уменьшает число необходимых обращений к OSD
-по сети и улучшает производительность. Поэтому даже с Vitastor лучше всегда
-использовать только серверные модели SSD с суперконденсаторами, особенно
-учитывая то, что стоят они ненамного дороже настольных.
-
-Также в прошивках SATA SSD (и даже HDD!) очень часто встречается либо баг,
-либо просто особенность логики, из-за которой серверные SSD, имеющие
-конденсаторы и защиту от потери питания, всё равно медленно работают с
-fsync. Чтобы понять, подвержены ли этой проблеме ваши SSD, сравните
-результаты тестов `fio -name=test -ioengine=libaio -direct=1 -bs=4k
--rw=randwrite -iodepth=1` без и с опцией `-fsync=1`. Результаты должны
-быть одинаковые. Если результат с `fsync=1` хуже, вы можете попробовать
-обойти проблему, "отключив" кэш записи диска командой `hdparm -W 0 /dev/sdXX`
-либо `echo write through > /sys/block/sdXX/device/scsi_disk/*/cache_type`
-(ВАЖНО: не перепутайте с `/sys/block/sdXX/queue/write_cache` - этот параметр
-менять руками небезопасно). Такая же проблема может встречаться и в новых
-HDD-дисках с внутренним SSD или "медиа" кэшем - например, она встречается во
-многих дисках Seagate EXOS (у них есть внутренний SSD-кэш, хотя это и не
-указано в спецификациях).
-
-Данный параметр нужно указывать и в etcd в /vitastor/config/global, и в
-командной строке или конфигурации OSD. Значения "all" и "small" требуют
-включения disable_journal_fsync и disable_meta_fsync, значение "all" также
-требует включения disable_data_fsync.
-
-Итого, вкратце: для оптимальной производительности установите
-immediate_commit в значение "all", если вы используете в кластере только SSD
-с суперконденсаторами и для данных, и для журналов. Если вы используете
-такие SSD для всех журналов, но не для данных - можете установить параметр
-в "small". Если и какие-то из дисков журналов имеют волатильный кэш записи -
-оставьте параметр пустым.
-
-## client_dirty_limit
-
-- Тип: целое число
-- Значение по умолчанию: 33554432
-
-При работе без immediate_commit=all - это лимит объёма "грязных" (не
-зафиксированных fsync-ом) данных, при достижении которого клиент будет
-принудительно вызывать fsync и фиксировать данные. Также стоит иметь в виду,
-что в этом случае до момента fsync клиент хранит копию незафиксированных
-данных в памяти, то есть, настройка влияет на потребление памяти клиентами.
-
-Параметр не влияет на сами OSD.

docs/config/layout-osd.en.md

@@ -1,176 +0,0 @@
-[Documentation](../../README.md#documentation) → [Configuration](../config.en.md) → OSD Disk Layout Parameters
-
------
-
-[Читать на русском](layout-osd.ru.md)
-
-# OSD Disk Layout Parameters
-
-These parameters apply to OSDs, are fixed at the moment of OSD drive
-initialization and can't be changed after it without losing data.
-
-- [data_device](#data_device)
-- [meta_device](#meta_device)
-- [journal_device](#journal_device)
-- [journal_offset](#journal_offset)
-- [journal_size](#journal_size)
-- [meta_offset](#meta_offset)
-- [data_offset](#data_offset)
-- [data_size](#data_size)
-- [meta_block_size](#meta_block_size)
-- [journal_block_size](#journal_block_size)
-- [disable_data_fsync](#disable_data_fsync)
-- [disable_meta_fsync](#disable_meta_fsync)
-- [disable_journal_fsync](#disable_journal_fsync)
-- [disable_device_lock](#disable_device_lock)
-- [disk_alignment](#disk_alignment)
-
-## data_device
-
-- Type: string
-
-Path to the block device to use for data. It's highly recommendded to use
-stable paths for all device names: `/dev/disk/by-partuuid/xxx...` instead
-of just `/dev/sda` or `/dev/nvme0n1` to not mess up after server restart.
-Files can also be used instead of block devices, but this is implemented
-only for testing purposes and not for production.
-
-## meta_device
-
-- Type: string
-
-Path to the block device to use for the metadata. Metadata must be on a fast
-SSD or performance will suffer. If this option is skipped, `data_device` is
-used for the metadata.
-
-## journal_device
-
-- Type: string
-
-Path to the block device to use for the journal. Journal must be on a fast
-SSD or performance will suffer. If this option is skipped, `meta_device` is
-used for the journal, and if it's also empty, journal is put on
-`data_device`. It's almost always fine to put metadata and journal on the
-same device, in this case you only need to set `meta_device`.
-
-## journal_offset
-
-- Type: integer
-- Default: 0
-
-Offset on the device in bytes where the journal is stored.
-
-## journal_size
-
-- Type: integer
-
-Journal size in bytes. By default, all available space between journal_offset
-and data_offset, meta_offset or the end of the journal device is used.
-Large journals aren't needed in SSD-only setups, 32 MB is always enough.
-In SSD+HDD setups it is beneficial to use larger journals (for example, 1 GB)
-and enable [throttle_small_writes](osd.en.md#throttle_small_writes).
-
-## meta_offset
-
-- Type: integer
-- Default: 0
-
-Offset on the device in bytes where the metadata area is stored.
-Again, set it to something if you colocate metadata with journal or data.
-
-## data_offset
-
-- Type: integer
-- Default: 0
-
-Offset on the device in bytes where the data area is stored.
-Again, set it to something if you colocate data with journal or metadata.
-
-## data_size
-
-- Type: integer
-
-Data area size in bytes. By default, the whole data device up to the end
-will be used for the data area, but you can restrict it if you want to use
-a smaller part. Note that there is no option to set metadata area size -
-it's derived from the data area size.
-
-## meta_block_size
-
-- Type: integer
-- Default: 4096
-
-Physical block size of the metadata device. 4096 for most current
-HDDs and SSDs.
-
-## journal_block_size
-
-- Type: integer
-- Default: 4096
-
-Physical block size of the journal device. Must be a multiple of
-`disk_alignment`. 4096 for most current HDDs and SSDs.
-
-## disable_data_fsync
-
-- Type: boolean
-- Default: false
-
-Do not issue fsyncs to the data device, i.e. do not flush its cache.
-Safe ONLY if your data device has write-through cache. If you disable
-the cache yourself using `hdparm` or `scsi_disk/cache_type` then make sure
-that the cache disable command is run every time before starting Vitastor
-OSD, for example, in the systemd unit. See also `immediate_commit` option
-for the instructions to disable cache and how to benefit from it.
-
-## disable_meta_fsync
-
-- Type: boolean
-- Default: false
-
-Same as disable_data_fsync, but for the metadata device. If the metadata
-device is not set or if the data device is used for the metadata the option
-is ignored and disable_data_fsync value is used instead of it.
-
-## disable_journal_fsync
-
-- Type: boolean
-- Default: false
-
-Same as disable_data_fsync, but for the journal device. If the journal
-device is not set or if the metadata device is used for the journal the
-option is ignored and disable_meta_fsync value is used instead of it. If
-the same device is used for data, metadata and journal the option is also
-ignored and disable_data_fsync value is used instead of it.
-
-## disable_device_lock
-
-- Type: boolean
-- Default: false
-
-Do not lock data, metadata and journal block devices exclusively with
-flock(). Though it's not recommended, but you can use it you want to run
-multiple OSD with a single device and different offsets, without using
-partitions.
-
-## disk_alignment
-
-- Type: integer
-- Default: 4096
-
-Required physical disk write alignment. Most current SSD and HDD drives
-use 4 KB physical sectors even if they report 512 byte logical sector
-size, so 4 KB is a good default setting.
-
-Note, however, that physical sector size also affects WA, because with block
-devices it's impossible to write anything smaller than a block. So, when
-Vitastor has to write a single metadata entry that's only about 32 bytes in
-size, it actually has to write the whole 4 KB sector.
-
-Because of this it can actually be beneficial to use SSDs which work well
-with 512 byte sectors and use 512 byte disk_alignment, journal_block_size
-and meta_block_size. But the only SSD that may fit into this category is
-Intel Optane (probably, not tested yet).
-
-Clients don't need to be aware of disk_alignment, so it's not required to
-put a modified value into etcd key /vitastor/config/global.

docs/config/layout-osd.ru.md

@@ -1,185 +0,0 @@
-[Документация](../../README-ru.md#документация) → [Конфигурация](../config.ru.md) → Дисковые параметры OSD
-
------
-
-[Read in English](layout-osd.en.md)
-
-# Дисковые параметры OSD
-
-Данные параметры используются только OSD и, также как и общекластерные
-дисковые параметры, задаются в момент инициализации дисков OSD и не могут быть
-изменены после этого без потери данных.
-
-- [data_device](#data_device)
-- [meta_device](#meta_device)
-- [journal_device](#journal_device)
-- [journal_offset](#journal_offset)
-- [journal_size](#journal_size)
-- [meta_offset](#meta_offset)
-- [data_offset](#data_offset)
-- [data_size](#data_size)
-- [meta_block_size](#meta_block_size)
-- [journal_block_size](#journal_block_size)
-- [disable_data_fsync](#disable_data_fsync)
-- [disable_meta_fsync](#disable_meta_fsync)
-- [disable_journal_fsync](#disable_journal_fsync)
-- [disable_device_lock](#disable_device_lock)
-- [disk_alignment](#disk_alignment)
-
-## data_device
-
-- Тип: строка
-
-Путь к диску (блочному устройству) для хранения данных. Крайне рекомендуется
-использовать стабильные пути: `/dev/disk/by-partuuid/xxx...` вместо простых
-`/dev/sda` или `/dev/nvme0n1`, чтобы пути не могли спутаться после
-перезагрузки сервера. Также вместо блочных устройств можно указывать файлы,
-но это реализовано только для тестирования, а не для боевой среды.
-
-## meta_device
-
-- Тип: строка
-
-Путь к диску метаданных. Метаданные должны располагаться на быстром
-SSD-диске, иначе производительность пострадает. Если эта опция не указана,
-для метаданных используется `data_device`.
-
-## journal_device
-
-- Тип: строка
-
-Путь к диску журнала. Журнал должен располагаться на быстром SSD-диске,
-иначе производительность пострадает. Если эта опция не указана,
-для журнала используется `meta_device`, если же пуста и она, журнал
-располагается на `data_device`. Нормально располагать журнал и метаданные
-на одном устройстве, в этом случае достаточно указать только `meta_device`.
-
-## journal_offset
-
-- Тип: целое число
-- Значение по умолчанию: 0
-
-Смещение на устройстве в байтах, по которому располагается журнал.
-
-## journal_size
-
-- Тип: целое число
-
-Размер журнала в байтах. По умолчанию для журнала используется всё доступное
-место между journal_offset и data_offset, meta_offset или концом диска.
-В SSD-кластерах большие журналы не нужны, достаточно 32 МБ. В гибридных
-(SSD+HDD) кластерах осмысленно использовать больший размер журнал (например, 1 ГБ)
-и включить [throttle_small_writes](osd.ru.md#throttle_small_writes).
-
-## meta_offset
-
-- Тип: целое число
-- Значение по умолчанию: 0
-
-Смещение на устройстве в байтах, по которому располагаются метаданные.
-Эту опцию нужно задать, если метаданные у вас хранятся на том же
-устройстве, что данные или журнал.
-
-## data_offset
-
-- Тип: целое число
-- Значение по умолчанию: 0
-
-Смещение на устройстве в байтах, по которому располагаются данные.
-Эту опцию нужно задать, если данные у вас хранятся на том же
-устройстве, что метаданные или журнал.
-
-## data_size
-
-- Тип: целое число
-
-Размер области данных в байтах. По умолчанию под данные будет использована
-вся доступная область устройства данных до конца устройства, но вы можете
-использовать эту опцию, чтобы ограничить её меньшим размером. Заметьте, что
-опции размера области метаданных нет - она вычисляется из размера области
-данных автоматически.
-
-## meta_block_size
-
-- Тип: целое число
-- Значение по умолчанию: 4096
-
-Размер физического блока устройства метаданных. 4096 для большинства
-современных SSD и HDD.
-
-## journal_block_size
-
-- Тип: целое число
-- Значение по умолчанию: 4096
-
-Размер физического блока устройства журнала. Должен быть кратен
-`disk_alignment`. 4096 для большинства современных SSD и HDD.
-
-## disable_data_fsync
-
-- Тип: булево (да/нет)
-- Значение по умолчанию: false
-
-Не отправлять fsync-и устройству данных, т.е. не сбрасывать его кэш.
-Безопасно, ТОЛЬКО если ваше устройство данных имеет кэш со сквозной
-записью (write-through). Если вы отключаете кэш через `hdparm` или
-`scsi_disk/cache_type`, то удостоверьтесь, что команда отключения кэша
-выполняется перед каждым запуском Vitastor OSD, например, в systemd unit-е.
-Смотрите также опцию `immediate_commit` для инструкций по отключению кэша
-и о том, как из этого извлечь выгоду.
-
-## disable_meta_fsync
-
-- Тип: булево (да/нет)
-- Значение по умолчанию: false
-
-То же, что disable_data_fsync, но для устройства метаданных. Если устройство
-метаданных не задано или если оно равно устройству данных, значение опции
-игнорируется и вместо него используется значение опции disable_data_fsync.
-
-## disable_journal_fsync
-
-- Тип: булево (да/нет)
-- Значение по умолчанию: false
-
-То же, что disable_data_fsync, но для устройства журнала. Если устройство
-журнала не задано или если оно равно устройству метаданных, значение опции
-игнорируется и вместо него используется значение опции disable_meta_fsync.
-Если одно и то же устройство используется и под данные, и под журнал, и под
-метаданные - значение опции также игнорируется и вместо него используется
-значение опции disable_data_fsync.
-
-## disable_device_lock
-
-- Тип: булево (да/нет)
-- Значение по умолчанию: false
-
-Не блокировать устройства данных, метаданных и журнала от открытия их
-другими OSD с помощью flock(). Так делать не рекомендуется, но теоретически
-вы можете это использовать, чтобы запускать несколько OSD на одном
-устройстве с разными смещениями и без использования разделов.
-
-## disk_alignment
-
-- Тип: целое число
-- Значение по умолчанию: 4096
-
-Требуемое выравнивание записи на физические диски. Почти все современные
-SSD и HDD диски используют 4 КБ физические секторы, даже если показывают
-логический размер сектора 512 байт, поэтому 4 КБ - хорошее значение по
-умолчанию.
-
-Однако стоит понимать, что физический размер сектора тоже влияет на
-избыточную запись (WA), потому что ничего меньше блока (сектора) на блочное
-устройство записать невозможно. Таким образом, когда Vitastor-у нужно
-записать на диск всего лишь одну 32-байтную запись метаданных, фактически
-приходится перезаписывать 4 КБ сектор целиком.
-
-Поэтому, на самом деле, может быть выгодно найти SSD, хорошо работающие с
-меньшими, 512-байтными, блоками и использовать 512-байтные disk_alignment,
-journal_block_size и meta_block_size. Однако единственные SSD, которые
-теоретически могут попасть в эту категорию - это Intel Optane (но и это
-пока не проверялось автором).
-
-Клиентам не обязательно знать про disk_alignment, так что помещать значение
-этого параметра в etcd в /vitastor/config/global не нужно.

docs/config/monitor.en.md

@@ -1,79 +0,0 @@
-[Documentation](../../README.md#documentation) → [Configuration](../config.en.md) → Monitor Parameters
-
------
-
-[Читать на русском](monitor.ru.md)
-
-# Monitor Parameters
-
-These parameters only apply to Monitors.
-
-- [etcd_mon_ttl](#etcd_mon_ttl)
-- [etcd_mon_timeout](#etcd_mon_timeout)
-- [etcd_mon_retries](#etcd_mon_retries)
-- [mon_change_timeout](#mon_change_timeout)
-- [mon_stats_timeout](#mon_stats_timeout)
-- [osd_out_time](#osd_out_time)
-- [placement_levels](#placement_levels)
-
-## etcd_mon_ttl
-
-- Type: seconds
-- Default: 30
-- Minimum: 10
-
-Monitor etcd lease refresh interval in seconds
-
-## etcd_mon_timeout
-
-- Type: milliseconds
-- Default: 1000
-
-etcd request timeout used by monitor
-
-## etcd_mon_retries
-
-- Type: integer
-- Default: 5
-
-Maximum number of attempts for one monitor etcd request
-
-## mon_change_timeout
-
-- Type: milliseconds
-- Default: 1000
-- Minimum: 100
-
-Optimistic retry interval for monitor etcd modification requests
-
-## mon_stats_timeout
-
-- Type: milliseconds
-- Default: 1000
-- Minimum: 100
-
-Interval for monitor to wait before updating aggregated statistics in
-etcd after receiving OSD statistics updates
-
-## osd_out_time
-
-- Type: seconds
-- Default: 600
-
-Time after which a failed OSD is removed from the data distribution.
-I.e. time which the monitor waits before attempting to restore data
-redundancy using other OSDs.
-
-## placement_levels
-
-- Type: json
-- Default: `{"host":100,"osd":101}`
-
-Levels for the placement tree. You can define arbitrary tree levels by
-defining them in this parameter. The configuration parameter value should
-contain a JSON object with level names as keys and integer priorities as
-values.  Smaller priority means higher level in tree. For example,
-"datacenter" should have smaller priority than "osd". "host" and "osd"
-levels are always predefined and can't be removed. If one of them is not
-present in the configuration, then it is defined with the default priority
-(100 for "host", 101 for "osd").