Implement actual client operation cancel

- Blockstores
  - Add more asynchrony to the chaos test to uncover more issues...
  - ...and fix them (~6 in the old store, ~9 in the new store)
  - Fix size check for journal_offset when sharing meta device (thanks Changwei Ye)
- Network layer
  - Correctly handle out-of-order zero-copy notifications (rare but possible in theory)
  - Fix double checksumming of header in proto_checksums=full mode
  - Add rxbounce option for Windows guests with TCP and enabled checksums
  - Close stopped peer sockets early to prevent hung zerocopy notifications and slow failover (~15 min instead of ~10 sec)
- OSD
  - Do not die on local blockstore modification errors (irrelevant since added write error handling)
- CSI
  - Fix VitastorFS NFS daemon lifecycle (thanks Dmitry Naumov)
  - Use a newer qemu-storage-daemon in CSI
- vitastor-cli
  - Add `dd` opool option
  - Fix `rm` with "inverse" optimisation incorrectly removing layer data before rename
    possibly leading to incorrect reads from child images during removal of an older-than-latest snapshot
  - Fix a possible hang in `merge` and derived commands (`rm`, `flatten`)
  - Fix mistakes in the `serve` OpenAPI spec (thanks Stepan Rabotkin)
  - Fix possible segfaults in `serve` due to invalid request parsing (thanks Vincent Schweiger)
  - Fix `serve` no-HTTPS mode (thanks both :))
- Build
  - Fix non-x86 builds failing due to unsupported xxhash x86dispatch
  - Forcibly enable assertions in all builds to remove build profile dependency
  - Fix QEMU driver build with QEMU < 10.2

.gitea/workflows/buildenv.Dockerfile

@@ -23,7 +23,7 @@ RUN apt-get update
 RUN apt-get -y install etcd qemu-system-x86 qemu-block-extra qemu-utils fio libasan8 \
     libgoogle-perftools-dev devscripts libjerasure-dev cmake libibverbs-dev libisal-dev
 RUN apt-get -y build-dep fio qemu=`dpkg -s qemu-system-x86|grep ^Version:|awk '{print $2}'`
-RUN apt-get update && apt-get -y install jq lp-solve sudo nfs-common fdisk parted libc-ares-dev udev
+RUN apt-get update && apt-get -y install jq lp-solve sudo nfs-common fdisk parted libc-ares-dev udev iproute2
 RUN apt-get --download-only source fio qemu=`dpkg -s qemu-system-x86|grep ^Version:|awk '{print $2}'`
 
 RUN set -ex; \

.gitea/workflows/test.yml

@@ -62,8 +62,13 @@ jobs:
     needs: build
     container: ${{env.TEST_IMAGE}}:${{github.sha}}
     steps:
-    # leak sanitizer sometimes crashes
-    - run: cd /root/vitastor/build && ASAN_OPTIONS=detect_leaks=0 make -j16 test
+    - name: Run tests
+      id: test
+      run: cd /root/vitastor/build && make -j16 build_tests test
+    - name: Print logs
+      if: always() && steps.test.outcome == 'failure'
+      run: |
+        cat /root/vitastor/build/Testing/Temporary/LastTest.log
 
   npm_lint:
     runs-on: ubuntu-latest
@@ -162,6 +167,24 @@ jobs:
           echo ""
         done
 
+  test_change_pg_minsize:
+    runs-on: ubuntu-latest
+    needs: build
+    container: ${{env.TEST_IMAGE}}:${{github.sha}}
+    steps:
+    - name: Run test
+      id: test
+      timeout-minutes: 3
+      run: /root/vitastor/tests/test_change_pg_minsize.sh
+    - name: Print logs
+      if: always() && steps.test.outcome == 'failure'
+      run: |
+        for i in /root/vitastor/testdata/*.log /root/vitastor/testdata/*.txt; do
+          echo "-------- $i --------"
+          cat $i
+          echo ""
+        done
+
   test_change_pg_size:
     runs-on: ubuntu-latest
     needs: build
@@ -288,6 +311,42 @@ jobs:
           echo ""
         done
 
+  test_img_online_resize:
+    runs-on: ubuntu-latest
+    needs: build
+    container: ${{env.TEST_IMAGE}}:${{github.sha}}
+    steps:
+    - name: Run test
+      id: test
+      timeout-minutes: 3
+      run: /root/vitastor/tests/test_img_online_resize.sh
+    - name: Print logs
+      if: always() && steps.test.outcome == 'failure'
+      run: |
+        for i in /root/vitastor/testdata/*.log /root/vitastor/testdata/*.txt; do
+          echo "-------- $i --------"
+          cat $i
+          echo ""
+        done
+
+  test_no_uring:
+    runs-on: ubuntu-latest
+    needs: build
+    container: ${{env.TEST_IMAGE}}:${{github.sha}}
+    steps:
+    - name: Run test
+      id: test
+      timeout-minutes: 3
+      run: /root/vitastor/tests/test_no_uring.sh
+    - name: Print logs
+      if: always() && steps.test.outcome == 'failure'
+      run: |
+        for i in /root/vitastor/testdata/*.log /root/vitastor/testdata/*.txt; do
+          echo "-------- $i --------"
+          cat $i
+          echo ""
+        done
+
   test_interrupted_rebalance:
     runs-on: ubuntu-latest
     needs: build
@@ -360,6 +419,78 @@ jobs:
           echo ""
         done
 
+  test_dump_load:
+    runs-on: ubuntu-latest
+    needs: build
+    container: ${{env.TEST_IMAGE}}:${{github.sha}}
+    steps:
+    - name: Run test
+      id: test
+      timeout-minutes: 3
+      run: /root/vitastor/tests/test_dump_load.sh
+    - name: Print logs
+      if: always() && steps.test.outcome == 'failure'
+      run: |
+        for i in /root/vitastor/testdata/*.log /root/vitastor/testdata/*.txt; do
+          echo "-------- $i --------"
+          cat $i
+          echo ""
+        done
+
+  test_dump_load_32k:
+    runs-on: ubuntu-latest
+    needs: build
+    container: ${{env.TEST_IMAGE}}:${{github.sha}}
+    steps:
+    - name: Run test
+      id: test
+      timeout-minutes: 3
+      run: TEST_NAME=32k OSD_ARGS="--data_csum_type crc32c --csum_block_size 32k" OFFSET_ARGS="$OSD_ARGS" /root/vitastor/tests/test_dump_load.sh
+    - name: Print logs
+      if: always() && steps.test.outcome == 'failure'
+      run: |
+        for i in /root/vitastor/testdata/*.log /root/vitastor/testdata/*.txt; do
+          echo "-------- $i --------"
+          cat $i
+          echo ""
+        done
+
+  test_old_dump_load:
+    runs-on: ubuntu-latest
+    needs: build
+    container: ${{env.TEST_IMAGE}}:${{github.sha}}
+    steps:
+    - name: Run test
+      id: test
+      timeout-minutes: 3
+      run: OLD=1 /root/vitastor/tests/test_dump_load.sh
+    - name: Print logs
+      if: always() && steps.test.outcome == 'failure'
+      run: |
+        for i in /root/vitastor/testdata/*.log /root/vitastor/testdata/*.txt; do
+          echo "-------- $i --------"
+          cat $i
+          echo ""
+        done
+
+  test_dump_load_old_32k:
+    runs-on: ubuntu-latest
+    needs: build
+    container: ${{env.TEST_IMAGE}}:${{github.sha}}
+    steps:
+    - name: Run test
+      id: test
+      timeout-minutes: 3
+      run: TEST_NAME=old_32k OLD=1 OSD_ARGS="--data_csum_type crc32c --csum_block_size 32k" OFFSET_ARGS="$OSD_ARGS" /root/vitastor/tests/test_dump_load.sh
+    - name: Print logs
+      if: always() && steps.test.outcome == 'failure'
+      run: |
+        for i in /root/vitastor/testdata/*.log /root/vitastor/testdata/*.txt; do
+          echo "-------- $i --------"
+          cat $i
+          echo ""
+        done
+
   test_old_interrupted_rebalance:
     runs-on: ubuntu-latest
     needs: build
@@ -720,6 +851,24 @@ jobs:
           echo ""
         done
 
+  test_snapshot_chain_enc_gcm:
+    runs-on: ubuntu-latest
+    needs: build
+    container: ${{env.TEST_IMAGE}}:${{github.sha}}
+    steps:
+    - name: Run test
+      id: test
+      timeout-minutes: 3
+      run: TEST_NAME=enc_gcm ENCRYPTED=1 VITASTOR_CFG=',"proto_checksums":"gcm"' /root/vitastor/tests/test_snapshot_chain.sh
+    - name: Print logs
+      if: always() && steps.test.outcome == 'failure'
+      run: |
+        for i in /root/vitastor/testdata/*.log /root/vitastor/testdata/*.txt; do
+          echo "-------- $i --------"
+          cat $i
+          echo ""
+        done
+
   test_old_snapshot_chain:
     runs-on: ubuntu-latest
     needs: build
@@ -1278,6 +1427,24 @@ jobs:
           echo ""
         done
 
+  test_heal_ec_rdma:
+    runs-on: ubuntu-latest
+    needs: build
+    container: ${{env.TEST_IMAGE}}:${{github.sha}}
+    steps:
+    - name: Run test
+      id: test
+      timeout-minutes: 10
+      run: TEST_NAME=ec_rdma RDMA=1 SCHEME=ec /root/vitastor/tests/test_heal.sh
+    - name: Print logs
+      if: always() && steps.test.outcome == 'failure'
+      run: |
+        for i in /root/vitastor/testdata/*.log /root/vitastor/testdata/*.txt; do
+          echo "-------- $i --------"
+          cat $i
+          echo ""
+        done
+
   test_checksum:
     runs-on: ubuntu-latest
     needs: build
@@ -1548,6 +1715,24 @@ jobs:
           echo ""
         done
 
+  test_resize_last:
+    runs-on: ubuntu-latest
+    needs: build
+    container: ${{env.TEST_IMAGE}}:${{github.sha}}
+    steps:
+    - name: Run test
+      id: test
+      timeout-minutes: 3
+      run: /root/vitastor/tests/test_resize_last.sh
+    - name: Print logs
+      if: always() && steps.test.outcome == 'failure'
+      run: |
+        for i in /root/vitastor/testdata/*.log /root/vitastor/testdata/*.txt; do
+          echo "-------- $i --------"
+          cat $i
+          echo ""
+        done
+
   test_resize_auto:
     runs-on: ubuntu-latest
     needs: build
@@ -1584,6 +1769,24 @@ jobs:
           echo ""
         done
 
+  test_old_resize_last:
+    runs-on: ubuntu-latest
+    needs: build
+    container: ${{env.TEST_IMAGE}}:${{github.sha}}
+    steps:
+    - name: Run test
+      id: test
+      timeout-minutes: 3
+      run: OLD=1 /root/vitastor/tests/test_resize_last.sh
+    - name: Print logs
+      if: always() && steps.test.outcome == 'failure'
+      run: |
+        for i in /root/vitastor/testdata/*.log /root/vitastor/testdata/*.txt; do
+          echo "-------- $i --------"
+          cat $i
+          echo ""
+        done
+
   test_old_resize_auto:
     runs-on: ubuntu-latest
     needs: build
@@ -2142,6 +2345,24 @@ jobs:
           echo ""
         done
 
+  test_nfs_long_readdir:
+    runs-on: ubuntu-latest
+    needs: build
+    container: ${{env.TEST_IMAGE}}:${{github.sha}}
+    steps:
+    - name: Run test
+      id: test
+      timeout-minutes: 3
+      run: /root/vitastor/tests/test_nfs_long_readdir.sh
+    - name: Print logs
+      if: always() && steps.test.outcome == 'failure'
+      run: |
+        for i in /root/vitastor/testdata/*.log /root/vitastor/testdata/*.txt; do
+          echo "-------- $i --------"
+          cat $i
+          echo ""
+        done
+
   test_write_encrypted:
     runs-on: ubuntu-latest
     needs: build

CMakeLists.txt

@@ -1,20 +1,20 @@
-cmake_minimum_required(VERSION 2.8.12)
+cmake_minimum_required(VERSION 2.8...3.30)
 
 project(vitastor)
 
-set(VITASTOR_VERSION "3.0.5")
+set(VITASTOR_VERSION "3.2.1")
 
 include(CTest)
 
 add_custom_target(build_tests)
-add_custom_target(test
-	COMMAND
-	echo leak:tcmalloc > ${CMAKE_CURRENT_BINARY_DIR}/lsan-suppress.txt &&
-	env LSAN_OPTIONS=suppressions=${CMAKE_CURRENT_BINARY_DIR}/lsan-suppress.txt ${CMAKE_CTEST_COMMAND}
+set_property(TEST PROPERTY ENVIRONMENT LSAN_OPTIONS=suppressions=${CMAKE_CURRENT_BINARY_DIR}/lsan-suppress.txt)
+add_test(gen_lsan_suppress
+    ${CMAKE_COMMAND} -E echo leak:tcmalloc > "${CMAKE_CURRENT_BINARY_DIR}/lsan-suppress.txt"
 )
+set_tests_properties(gen_lsan_suppress PROPERTIES FIXTURES_SETUP f_lsan_suppress)
+set_property(TEST PROPERTY FIXTURES_REQUIRED f_lsan_suppress)
 # make -j16 -C ../../build test_heap && ../../build/src/test/test_heap
 # make -j16 -C ../../build test_heap && rm -f $(find ../../build -name '*.gcda') && ctest -V -T test -T coverage -R heap --test-dir ../../build && (cd ../../build; gcovr -f ../src --html --html-nested -o coverage/index.html; cd ../src/test)
 # make -j16 -C ../../build test_blockstore && rm -f $(find ../../build -name '*.gcda') && ctest -V -T test -T coverage -R blockstore --test-dir ../../build && (cd ../../build; gcovr -f ../src --html --html-nested -o coverage/index.html; cd ../src/test)
 # kcov --include-path=../../../src ../../kcov ./test_blockstore
-add_dependencies(test build_tests)
 add_subdirectory(src)

README-ru.md

@@ -73,6 +73,7 @@ Vitastor поддерживает QEMU-драйвер, протоколы UBLK,
   - [NBD](docs/usage/nbd.ru.md) - старый интерфейс для монтирования ядром
   - [QEMU, qemu-img и VDUSE](docs/usage/qemu.ru.md)
   - [NFS](docs/usage/nfs.ru.md) кластерная файловая система и псевдо-ФС прокси
+  - [Безопасность](docs/usage/security.ru.md)
   - [Администрирование](docs/usage/admin.ru.md)
 - Производительность
   - [Понимание сути производительности](docs/performance/understanding.ru.md)

README.md

@@ -73,6 +73,7 @@ Read more details in the documentation. You can start from here: [Quick Start](d
   - [NBD](docs/usage/nbd.en.md) - old interface for kernel mounts
   - [QEMU, qemu-img and VDUSE](docs/usage/qemu.en.md)
   - [NFS](docs/usage/nfs.en.md) clustered file system and pseudo-FS proxy
+  - [Security](docs/usage/security.en.md)
   - [Administration](docs/usage/admin.en.md)
 - Performance
   - [Understanding storage performance](docs/performance/understanding.en.md)

csi/Dockerfile

@@ -37,8 +37,8 @@ RUN (echo deb http://vitastor.io/debian trixie main > /etc/apt/sources.list.d/vi
     wget -q -O /etc/apt/trusted.gpg.d/vitastor.gpg https://vitastor.io/debian/pubkey.gpg && \
     apt-get update && \
     apt-get install -y vitastor-client ibverbs-providers && \
-    wget https://vitastor.io/archive/qemu/qemu-trixie-10.0.2%2Bds-2%2Bvitastor1/qemu-utils_10.0.2%2Bds-2%2Bvitastor1_amd64.deb && \
-    wget https://vitastor.io/archive/qemu/qemu-trixie-10.0.2%2Bds-2%2Bvitastor1/qemu-block-extra_10.0.2%2Bds-2%2Bvitastor1_amd64.deb && \
+    wget https://vitastor.io/archive/qemu/qemu-trixie-10.0.11%2Bds-0%2Bdeb13u1%2Bvitastor2/qemu-utils_10.0.11%2Bds-0%2Bdeb13u1%2Bvitastor2_amd64.deb && \
+    wget https://vitastor.io/archive/qemu/qemu-trixie-10.0.11%2Bds-0%2Bdeb13u1%2Bvitastor2/qemu-block-extra_10.0.11%2Bds-0%2Bdeb13u1%2Bvitastor2_amd64.deb && \
     dpkg -x qemu-utils*.deb tmp1 && \
     dpkg -x qemu-block-extra*.deb tmp1 && \
     cp -a tmp1/usr/bin/qemu-storage-daemon /usr/bin/ && \

csi/Dockerfile.local

@@ -25,8 +25,8 @@ RUN apt-get update && \
         # NFS mount dependencies
         nfs-common netbase \
         # dependencies of qemu-storage-daemon
-        libnuma1 liburing2 libglib2.0-0 libfuse3-3 libaio1 libzstd1 libnettle8 \
-        libgmp10 libhogweed6 libp11-kit0 libidn2-0 libunistring2 libtasn1-6 libpcre2-8-0 libffi8 && \
+        libaio1t64 libc6 libfuse3-4 libglib2.0-0t64 libgmp10 libgnutls30t64 \
+        libhogweed6t64 libnettle8t64 libnuma1 libselinux1 liburing2 libzstd1 zlib1g && \
     apt-get clean && \
     (echo options nbd nbds_max=128 > /etc/modprobe.d/nbd.conf)
 
@@ -36,8 +36,8 @@ ADD deb /deb
 
 RUN apt-get update && \
     apt-get -y install /deb/vitastor-client_*.deb && \
-    wget https://vitastor.io/archive/qemu/qemu-trixie-9.2.2%2Bds-1%2Bvitastor4/qemu-utils_9.2.2%2Bds-1%2Bvitastor4_amd64.deb && \
-    wget https://vitastor.io/archive/qemu/qemu-trixie-9.2.2%2Bds-1%2Bvitastor4/qemu-block-extra_9.2.2%2Bds-1%2Bvitastor4_amd64.deb && \
+    wget https://vitastor.io/archive/qemu/qemu-trixie-10.0.11%2Bds-0%2Bdeb13u1%2Bvitastor2/qemu-utils_10.0.11%2Bds-0%2Bdeb13u1%2Bvitastor2_amd64.deb && \
+    wget https://vitastor.io/archive/qemu/qemu-trixie-10.0.11%2Bds-0%2Bdeb13u1%2Bvitastor2/qemu-block-extra_10.0.11%2Bds-0%2Bdeb13u1%2Bvitastor2_amd64.deb && \
     dpkg -x qemu-utils*.deb tmp1 && \
     dpkg -x qemu-block-extra*.deb tmp1 && \
     cp -a tmp1/usr/bin/qemu-storage-daemon /usr/bin/ && \

csi/Makefile

@@ -1,4 +1,4 @@
-VITASTOR_VERSION ?= v3.0.5
+VITASTOR_VERSION ?= v3.2.1
 
 all: build push
 

csi/deploy/004-csi-nodeplugin.yaml

@@ -49,7 +49,7 @@ spec:
             capabilities:
               add: ["SYS_ADMIN"]
             allowPrivilegeEscalation: true
-          image: vitalif/vitastor-csi:v3.0.5
+          image: vitalif/vitastor-csi:v3.2.1
           args:
             - "--node=$(NODE_ID)"
             - "--endpoint=$(CSI_ENDPOINT)"

csi/deploy/007-csi-provisioner.yaml

@@ -87,7 +87,7 @@ spec:
             - name: socket-dir
               mountPath: /csi
         - name: csi-attacher
-          image: k8s.gcr.io/sig-storage/csi-attacher:v3.1.0
+          image: k8s.gcr.io/sig-storage/csi-attacher:v3.2.1
           args:
             - "--v=5"
             - "--csi-address=$(ADDRESS)"
@@ -121,7 +121,7 @@ spec:
             privileged: true
             capabilities:
               add: ["SYS_ADMIN"]
-          image: vitalif/vitastor-csi:v3.0.5
+          image: vitalif/vitastor-csi:v3.2.1
           args:
             - "--node=$(NODE_ID)"
             - "--endpoint=$(CSI_ENDPOINT)"

csi/go.mod

@@ -7,6 +7,7 @@ require (
 	github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b
 	github.com/kubernetes-csi/csi-lib-utils v0.9.1
 	golang.org/x/net v0.7.0
+	golang.org/x/sys v0.5.0 // indirect
 	golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 // indirect
 	google.golang.org/grpc v1.33.1
 	google.golang.org/protobuf v1.24.0

csi/src/config.go

@@ -5,7 +5,7 @@ package vitastor
 
 const (
     vitastorCSIDriverName    = "csi.vitastor.io"
-    vitastorCSIDriverVersion = "3.0.5"
+    vitastorCSIDriverVersion = "3.2.1"
 )
 
 // Config struct fills the parameters of request or user input

csi/src/controllerserver.go

@@ -8,7 +8,6 @@ import (
     "encoding/json"
     "fmt"
     "strings"
-    "time"
     "os"
     "io/ioutil"
 
@@ -27,7 +26,6 @@ const (
     MB int64 = 1024 * KB
     GB int64 = 1024 * MB
     TB int64 = 1024 * GB
-    ETCD_TIMEOUT time.Duration = 15*time.Second
 )
 
 type InodeIndex struct
@@ -687,7 +685,7 @@ func (cs *ControllerServer) ControllerExpandVolume(ctx context.Context, req *csi
 
     return &csi.ControllerExpandVolumeResponse{
         CapacityBytes: int64(inodeCfg[0].Size),
-        NodeExpansionRequired: false,
+        NodeExpansionRequired: true,
     }, nil
 }
 

csi/src/nodeserver.go

@@ -96,18 +96,16 @@ func NewNodeServer(driver *Driver) *NodeServer
     {
         ns.restoreUblkDaemons()
     }
-    if (ns.method == MOUNT_VDUSE || ns.method == MOUNT_UBLK)
+    ns.restoreNfsDaemons()
+    dur, err := time.ParseDuration(os.Getenv("RESTART_INTERVAL"))
+    if (err != nil)
     {
-        dur, err := time.ParseDuration(os.Getenv("RESTART_INTERVAL"))
-        if (err != nil)
-        {
-            dur = 10 * time.Second
-        }
-        ns.restartInterval = dur
-        if (ns.restartInterval != time.Duration(0))
-        {
-            go ns.restarter()
-        }
+        dur = 10 * time.Second
+    }
+    ns.restartInterval = dur
+    if (ns.restartInterval != time.Duration(0))
+    {
+        go ns.restarter()
     }
     return ns
 }
@@ -134,10 +132,8 @@ func (ns *NodeServer) unlockVolume(lockId string)
 
 func (ns *NodeServer) restarter()
 {
-    // Restart dead VDUSE daemons at regular intervals
-    // Otherwise volume I/O may hang in case of a qemu-storage-daemon crash
-    // Moreover, it may lead to a kernel panic of the kernel is configured to
-    // panic on hung tasks
+    // Restart dead storage daemons at regular intervals. Otherwise volume I/O
+    // may hang and may even lead to a kernel panic if panic_on_hung_task is set.
     ticker := time.NewTicker(ns.restartInterval)
     defer ticker.Stop()
     for
@@ -151,6 +147,7 @@ func (ns *NodeServer) restarter()
         {
             ns.restoreUblkDaemons()
         }
+        ns.restoreNfsDaemons()
     }
 }
 
@@ -329,15 +326,10 @@ func (ns *NodeServer) restoreNfsDaemons()
     {
         return
     }
-    activeNFS, err := ns.listActiveNFS()
-    if (err != nil)
-    {
-        return
-    }
     // Check all state files and try to restore active mounts
     for _, stateFile := range stateFiles
     {
-        ns.checkNfsState(stateFile, activeNFS)
+        ns.checkNfsState(stateFile)
     }
 }
 
@@ -363,24 +355,43 @@ func (ns *NodeServer) readNfsState(stateFile string, allowNotExists bool) (*NfsS
     return &state, nil
 }
 
-func (ns *NodeServer) checkNfsState(stateFile string, activeNfs map[int][]string)
+func (ns *NodeServer) checkNfsState(stateFile string)
 {
-    // Read state file
+    // Read state file to determine the lock ID
     state, err := ns.readNfsState(stateFile, false)
     if (err != nil)
     {
         return
     }
     // Lock FS
-    ns.lockVolume(state.ConfigPath+":fs:"+state.FsName)
-    defer ns.unlockVolume(state.ConfigPath+":fs:"+state.FsName)
-    // Check if NFS at this port is still mounted
+    lockId := state.ConfigPath+":fs:"+state.FsName
+    ns.lockVolume(lockId)
+    defer ns.unlockVolume(lockId)
+    // Recheck state and mounts under the lock: publish/unpublish may have changed
+    // both while this recovery attempt was waiting for the lock.
+    state, err = ns.readNfsState(stateFile, true)
+    if (err != nil || state == nil)
+    {
+        return
+    }
+    activeNfs, err := ns.listActiveNFS()
+    if (err != nil)
+    {
+        return
+    }
     pidFile := ns.stateDir + filepath.Base(stateFile)
     pidFile = pidFile[0:len(pidFile)-5] + ".pid"
     if (len(activeNfs[state.Port]) == 0)
     {
-        // this is a stale state file, remove it
+        // This is a stale state file. Remove the root staging mount before
+        // stopping the daemon, otherwise a dead hidden NFS mount may remain.
         klog.Warningf("state file %v contains stale mount at port %d, removing it", stateFile, state.Port)
+        err = mount.CleanupMountPoint(state.Path, ns.mounter, false)
+        if (err != nil)
+        {
+            klog.Errorf("failed to unmount stale NFS mount %v: %v", state.Path, err)
+            return
+        }
         ns.stopNFS(stateFile, pidFile)
         return
     }
@@ -400,6 +411,7 @@ func (ns *NodeServer) checkNfsState(stateFile string, activeNfs map[int][]string
             "--pidfile", pidFile,
             "--bind", "127.0.0.1",
             "--port", fmt.Sprintf("%d", state.Port),
+            "--config_path", state.ConfigPath,
             "--fs", state.FsName,
             "--pool", state.Pool,
             "--portmap", "0",
@@ -725,6 +737,7 @@ func (ns *NodeServer) mountNFS(ctxVars map[string]string) (string, error)
         "--pidfile", pidFile,
         "--bind", "127.0.0.1",
         "--port", "auto",
+        "--config_path", state.ConfigPath,
         "--fs", state.FsName,
         "--pool", state.Pool,
         "--portmap", "0",
@@ -754,7 +767,7 @@ func (ns *NodeServer) mountNFS(ctxVars map[string]string) (string, error)
     // Mount NFS
     _, _, err = system(
         "mount", "-t", "nfs", "127.0.0.1:/", state.Path,
-        "-o", fmt.Sprintf("port=%d,mountport=%d,nfsvers=3,soft,nolock,tcp", port, port),
+        "-o", fmt.Sprintf("port=%d,mountport=%d,nfsvers=3,soft,sync,nolock,tcp", port, port),
     )
     if (err != nil)
     {
@@ -815,26 +828,38 @@ func (ns *NodeServer) listActiveNFS() (map[int][]string, error)
         klog.Errorf("failed to list mounts: %v", err)
         return nil, err
     }
+    return collectActiveNFS(mounts), nil
+}
+
+func collectActiveNFS(mounts []mount.MountInfo) map[int][]string
+{
     activeNFS := make(map[int][]string)
-    for _, mount := range mounts
+    for _, mnt := range mounts
     {
-        // Volume mounts always refer to subpaths
-        if (mount.FsType == "nfs" && mount.Root != "/")
+        // Only count PVC subdirectory mounts, not the root staging mount. Newer
+        // kernels expose the subdirectory in Source while older ones expose it
+        // in Root. The staging mount may also be visible through several bind
+        // aliases in the CSI container, so its mount point isn't a reliable
+        // discriminator.
+        if (mnt.FsType != "nfs" || !strings.HasPrefix(mnt.Source, "127.0.0.1:/") ||
+            (mnt.Source == "127.0.0.1:/" && mnt.Root == "/"))
         {
-            for _, opt := range mount.MountOptions
+            continue
+        }
+        // NFS-specific options, including port, are per-superblock options.
+        for _, opt := range mnt.SuperOptions
+        {
+            if (strings.HasPrefix(opt, "port="))
             {
-                if (strings.HasPrefix(opt, "port="))
+                port64, err := strconv.ParseUint(opt[5:], 10, 16)
+                if (err == nil)
                 {
-                    port64, err := strconv.ParseUint(opt[5:], 10, 16)
-                    if (err == nil)
-                    {
-                        activeNFS[int(port64)] = append(activeNFS[int(port64)], mount.MountPoint)
-                    }
+                    activeNFS[int(port64)] = append(activeNFS[int(port64)], mnt.MountPoint)
                 }
             }
         }
     }
-    return activeNFS, nil
+    return activeNFS
 }
 
 // NodePublishVolume mounts the volume mounted to the staging path to the target path
@@ -1030,10 +1055,131 @@ func (ns *NodeServer) NodeGetVolumeStats(ctx context.Context, req *csi.NodeGetVo
     return nil, status.Error(codes.Unimplemented, "")
 }
 
-// NodeExpandVolume expanding the file system on the node
+// NodeExpandVolume expands the block device and, for filesystem volumes, the filesystem on the node
 func (ns *NodeServer) NodeExpandVolume(ctx context.Context, req *csi.NodeExpandVolumeRequest) (*csi.NodeExpandVolumeResponse, error)
 {
-    return nil, status.Error(codes.Unimplemented, "")
+    klog.Infof("received node expand volume request %+v", protosanitizer.StripSecrets(req))
+    if (req == nil)
+    {
+        return nil, status.Error(codes.InvalidArgument, "request cannot be empty")
+    }
+    if (req.VolumeId == "")
+    {
+        return nil, status.Error(codes.InvalidArgument, "VolumeId is required")
+    }
+
+    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"]
+
+    if (ctxVars["vitastorfs"] != "")
+    {
+        // VitastorFS CSI volumes are NFS-backed and currently don't have per-volume quotas to resize here.
+        return &csi.NodeExpandVolumeResponse{CapacityBytes: req.GetCapacityRange().GetRequiredBytes()}, nil
+    }
+
+    ns.lockVolume(ctxVars["configPath"]+":block:"+volName)
+    defer ns.unlockVolume(ctxVars["configPath"]+":block:"+volName)
+
+    targetPath := req.GetStagingTargetPath()
+    if (targetPath == "")
+    {
+        targetPath = req.GetVolumePath()
+    }
+    if (targetPath == "")
+    {
+        return nil, status.Error(codes.InvalidArgument, "VolumePath or StagingTargetPath is required")
+    }
+
+    devicePath, err := GetDeviceNameFromMount(targetPath)
+    if (err != nil)
+    {
+        if (os.IsNotExist(err))
+        {
+            return nil, status.Error(codes.NotFound, "Target path not found")
+        }
+        return nil, err
+    }
+    if (devicePath == "")
+    {
+        return nil, status.Errorf(codes.NotFound, "%s is not a mountpoint", targetPath)
+    }
+    if (devicePath[0] != '/')
+    {
+        return nil, status.Errorf(codes.Internal, "failed to resolve device for %s: %s", targetPath, devicePath)
+    }
+    if (len(devicePath) < 5 || devicePath[0:5] != "/dev/")
+    {
+        // NodeExpandVolume may be called with the published target path. For block volumes it is
+        // usually a bind mount of the staging target, so resolve one more mount layer if needed.
+        var realDevicePath string
+        realDevicePath, err = GetDeviceNameFromMount(devicePath)
+        if (err == nil && realDevicePath != "")
+        {
+            devicePath = realDevicePath
+        }
+    }
+
+    // All newest Vitastor driver versions (nbd, ublk and vduse) support online resize.
+    // So all we need to do is just wait a bit until the device is resized by the driver.
+    requiredBytes := req.GetCapacityRange().GetRequiredBytes()
+    if (requiredBytes > 0)
+    {
+        timeout := 30
+        var actualSize uint64
+        var err error
+        for i := 0; i < timeout && actualSize < uint64(requiredBytes); i++
+        {
+            actualSize, err = GetBlockDeviceSize(devicePath)
+            if (err != nil)
+            {
+                return nil, err
+            }
+            time.Sleep(1 * time.Second)
+        }
+        if (actualSize < uint64(requiredBytes))
+        {
+            return nil, status.Errorf(codes.NotFound, "Failed to wait for online resize of %s to %v bytes: actual size is still %v after %v seconds",
+                devicePath, requiredBytes, actualSize, timeout)
+        }
+    }
+
+    isBlock := req.GetVolumeCapability().GetBlock() != nil
+    if (isBlock)
+    {
+        return &csi.NodeExpandVolumeResponse{CapacityBytes: requiredBytes}, nil
+    }
+
+    diskMounter := &mount.SafeFormatAndMount{Interface: ns.mounter, Exec: utilexec.New()}
+    fsType := req.GetVolumeCapability().GetMount().GetFsType()
+    if (fsType == "")
+    {
+        fsType, err = diskMounter.GetDiskFormat(devicePath)
+        if (err != nil)
+        {
+            return nil, err
+        }
+    }
+
+    switch (fsType)
+    {
+        case "ext4":
+            _, err = systemCombined("resize2fs", devicePath)
+        case "xfs":
+            _, err = systemCombined("xfs_growfs", targetPath)
+        default:
+            return nil, status.Errorf(codes.InvalidArgument, "unsupported filesystem for resize: %s", fsType)
+    }
+    if (err != nil)
+    {
+        return nil, err
+    }
+
+    return &csi.NodeExpandVolumeResponse{CapacityBytes: requiredBytes}, nil
 }
 
 // NodeGetCapabilities returns the supported capabilities of the node server
@@ -1048,6 +1194,13 @@ func (ns *NodeServer) NodeGetCapabilities(ctx context.Context, req *csi.NodeGetC
                     },
                 },
             },
+            &csi.NodeServiceCapability{
+                Type: &csi.NodeServiceCapability_Rpc{
+                    Rpc: &csi.NodeServiceCapability_RPC{
+                        Type: csi.NodeServiceCapability_RPC_EXPAND_VOLUME,
+                    },
+                },
+            },
         },
     }, nil
 }

csi/src/nodeserver_test.go

@@ -0,0 +1,73 @@
+// Copyright (c) Vitaliy Filippov, 2019+
+// License: VNPL-1.1 or GNU GPL-2.0+ (see README.md for details)
+
+package vitastor
+
+import (
+    "reflect"
+    "testing"
+
+    "k8s.io/utils/mount"
+)
+
+func TestCollectActiveNFS(t *testing.T)
+{
+    mounts := []mount.MountInfo{
+        {
+            Root:         "/",
+            Source:       "127.0.0.1:/",
+            MountPoint:   "/var/lib/kubelet/plugins/csi.vitastor.io/nfs/hash",
+            FsType:       "nfs",
+            MountOptions: []string{"rw", "relatime"},
+            SuperOptions: []string{"rw", "vers=3", "port=45059"},
+        },
+        {
+            // This is how NFS subdirectory bind mounts appear on Linux 6.19:
+            // Root is still / and the subdirectory is only visible in Source.
+            Root:         "/",
+            Source:       "127.0.0.1:/pvc-one",
+            MountPoint:   "/var/lib/kubelet/pods/pod-one/volumes/kubernetes.io~csi/pvc-one/mount",
+            FsType:       "nfs",
+            MountOptions: []string{"rw", "relatime"},
+            SuperOptions: []string{"rw", "vers=3", "port=45059"},
+        },
+        {
+            Root:         "/",
+            Source:       "127.0.0.1:/pvc-two",
+            MountPoint:   "/var/lib/kubelet/pods/pod-two/volumes/kubernetes.io~csi/pvc-two/mount",
+            FsType:       "nfs",
+            MountOptions: []string{"rw", "relatime"},
+            SuperOptions: []string{"rw", "vers=3", "port=45059"},
+        },
+        {
+            // Older kernels expose the bind-mounted subdirectory in Root.
+            Root:         "/pvc-three",
+            Source:       "127.0.0.1:/",
+            MountPoint:   "/var/lib/kubelet/pods/pod-three/volumes/kubernetes.io~csi/pvc-three/mount",
+            FsType:       "nfs",
+            MountOptions: []string{"rw", "relatime"},
+            SuperOptions: []string{"rw", "vers=3", "port=45059"},
+        },
+        {
+            Root:         "/",
+            Source:       "server:/other",
+            MountPoint:   "/mnt/other",
+            FsType:       "nfs",
+            MountOptions: []string{"rw"},
+            SuperOptions: []string{"rw", "port=2049"},
+        },
+    }
+
+    got := collectActiveNFS(mounts)
+    want := map[int][]string{
+        45059: {
+            "/var/lib/kubelet/pods/pod-one/volumes/kubernetes.io~csi/pvc-one/mount",
+            "/var/lib/kubelet/pods/pod-two/volumes/kubernetes.io~csi/pvc-two/mount",
+            "/var/lib/kubelet/pods/pod-three/volumes/kubernetes.io~csi/pvc-three/mount",
+        },
+    }
+    if (!reflect.DeepEqual(got, want))
+    {
+        t.Fatalf("unexpected active NFS mounts: got %#v, want %#v", got, want)
+    }
+}

csi/src/utils.go

@@ -20,6 +20,7 @@ import (
 
     "google.golang.org/grpc/codes"
     "google.golang.org/grpc/status"
+    "golang.org/x/sys/unix"
 )
 
 type MountMethod int
@@ -519,3 +520,22 @@ func GetDeviceNameFromMount(mountPath string) (string, error)
 
     return device, nil
 }
+
+func GetBlockDeviceSize(devicePath string) (uint64, error)
+{
+    file, err := os.Open(devicePath)
+    if (err != nil)
+    {
+        return 0, err
+    }
+    defer file.Close()
+
+    // BLKGETSIZE64 returns the size in bytes as a uint64/int64
+    size, err := unix.IoctlGetInt(int(file.Fd()), unix.BLKGETSIZE64)
+    if (err != nil)
+    {
+        return 0, fmt.Errorf("ioctl BLKGETSIZE64 failed: %w", err)
+    }
+
+    return uint64(size), nil
+}

debian/changelog

@@ -1,4 +1,4 @@
-vitastor (3.0.5-1) unstable; urgency=medium
+vitastor (3.2.1-1) unstable; urgency=medium
 
   * Bugfixes
 

debian/rules

@@ -11,6 +11,7 @@ override_dh_install:
 	cp -v node-binding/package.json node-binding/index.js node-binding/addon.cc node-binding/addon.h node-binding/client.cc node-binding/client.h debian/tmp/usr/lib/x86_64-linux-gnu/nodejs/vitastor
 	cp -v node-binding/build/Release/addon.node debian/tmp/usr/lib/x86_64-linux-gnu/nodejs/vitastor/build/Release
 	dh_install
+	cd debian/vitastor-mon/usr/lib/vitastor/mon && npm install --production
 
 override_dh_installdeb:
 	cat debian/fio_version >> debian/vitastor-fio.substvars

debian/vitastor-build.sh

@@ -37,14 +37,8 @@ rm -rf a b
 
 echo "dep:fio=$FIO" > debian/fio_version
 
-cd /root/vitastor/packages/vitastor-$REL/vitastor-$VER
-mkdir mon/node_modules
-cd mon/node_modules
-curl -s https://git.yourcmc.ru/vitalif/antietcd/archive/master.tar.gz | tar -zx
-curl -s https://git.yourcmc.ru/vitalif/tinyraft/archive/master.tar.gz | tar -zx
-
 cd /root/vitastor/packages/vitastor-$REL
-if [[ "$REL" = "trixie" && -e ../vitastor-bookworm/vitastor_$VER.orig.tar.xz ]]; then
+if [[ ( "$REL" = "trixie" || "$REL" = "resolute" ) && -e ../vitastor-bookworm/vitastor_$VER.orig.tar.xz ]]; then
     # Fucking shit, archives differ between bookworm (xz 5.4.1) and trixie (xz 5.8.1)
     cp ../vitastor-bookworm/vitastor_$VER.orig.tar.xz .
 else

debian/vitastor-buildenv.Dockerfile

@@ -14,18 +14,18 @@ WORKDIR /root
 RUN set -e -x; \
     if [ "$REL" = "buster" ]; then \
         perl -i -pe 's/deb.debian.org/archive.debian.org/' /etc/apt/sources.list; \
-        apt-get update; \
-        apt-get -y install wget; \
-        wget https://vitastor.io/debian/pubkey.gpg -O /etc/apt/trusted.gpg.d/vitastor.gpg; \
-        echo "deb https://vitastor.io/debian $REL main" >> /etc/apt/sources.list; \
     fi; \
+    apt-get update; \
+    apt-get -y install wget; \
+    wget https://vitastor.io/debian/pubkey.gpg -O /etc/apt/trusted.gpg.d/vitastor.gpg; \
+    echo "deb https://vitastor.io/debian $REL main" >> /etc/apt/sources.list; \
     grep '^deb ' /etc/apt/sources.list | perl -pe 's/^deb/deb-src/' >> /etc/apt/sources.list; \
     perl -i -pe 's/Types: deb$/Types: deb deb-src/' /etc/apt/sources.list.d/*.sources || true; \
     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 fio libgoogle-perftools-dev devscripts libjerasure-dev cmake libc-ares-dev \
-        libibverbs-dev librdmacm-dev libisal-dev libnl-3-dev libnl-genl-3-dev curl nodejs npm node-nan node-bindings && \
+    apt-get -y install fio libgoogle-perftools-dev devscripts libjerasure-dev cmake libc-ares-dev libisal-crypto-dev \
+        libibverbs-dev librdmacm-dev libisal-dev libnl-3-dev libnl-genl-3-dev libssl-dev curl nodejs npm node-nan node-bindings && \
     apt-get -y build-dep fio && \
     apt-get --download-only source fio

debian/vitastor-client.install

@@ -4,6 +4,8 @@ usr/bin/vitastor-rm
 usr/bin/vitastor-nbd
 usr/bin/vitastor-ublk
 usr/bin/vitastor-nfs
+usr/sbin/mount.vitastorfs
+usr/sbin/mount.vitastorblk
 usr/bin/vitastor-kv
 usr/bin/vitastor-kv-stress
 usr/lib/*/libvitastor*.so*

docker/Makefile

@@ -1,4 +1,4 @@
-VITASTOR_VERSION ?= v3.0.5
+VITASTOR_VERSION ?= v3.2.1
 
 all: build push
 

docker/etc/systemd/system/vitastor-etcd.service

@@ -12,12 +12,7 @@ EnvironmentFile=/etc/vitastor/etcd.conf
 SyslogIdentifier=etcd
 ExecStart=bash -c 'docker run --rm -i -v /var/lib/vitastor/etcd:/data \
     --log-driver none --network host $CONTAINER_OPTIONS --name vitastor-etcd \
-    $ETCD_IMAGE /usr/local/bin/etcd --name "$ETCD_NAME" --data-dir /data \
-    --snapshot-count 10000 --advertise-client-urls http://$ETCD_IP:2379 --listen-client-urls http://$ETCD_IP:2379 \
-    --initial-advertise-peer-urls http://$ETCD_IP:2380 --listen-peer-urls http://$ETCD_IP:2380 \
-    --initial-cluster-token vitastor-etcd-1 --initial-cluster "$ETCD_INITIAL_CLUSTER" \
-    --initial-cluster-state new --max-txn-ops=100000 --max-request-bytes=104857600 \
-    --auto-compaction-retention=10 --auto-compaction-mode=revision'
+    $ETCD_IMAGE /usr/local/bin/etcd --data-dir /data
 ExecStop=docker stop vitastor-etcd
 Restart=always
 StartLimitInterval=0

docker/etc/vitastor/docker.conf

@@ -4,7 +4,7 @@
 #
 
 # Desired Vitastor version
-VITASTOR_VERSION=v3.0.5
+VITASTOR_VERSION=v3.2.1
 
 # Additional arguments for all containers
 # For example, you may want to specify a custom logging driver here

docker/etc/vitastor/etcd.conf

@@ -1,4 +1 @@
 ETCD_IMAGE=quay.io/coreos/etcd:v3.5.18
-ETCD_NAME=""
-ETCD_IP=""
-ETCD_INITIAL_CLUSTER=""

docs/config/monitor.en.md

@@ -50,6 +50,9 @@ or antietcd_data_dir options). All other antietcd parameters
 cluster, cluster_key, persist_filter, stale_read can also be set in
 Vitastor configuration with `antietcd_` prefix.
 
+See also: [antietcd_cert](security.en.md#antietcd_cert),
+[antietcd_key](security.en.md#antietcd_key) and [etcd_proxy](security.en.md#etcd_proxyurls).
+
 You can dump/load data to or from antietcd using Antietcd `anticli` tool:
 
 ```

docs/config/monitor.ru.md

@@ -50,6 +50,9 @@ antietcd_data_file или antietcd_data_dir). Все остальные пара
 node_id, cluster, cluster_key, persist_filter, stale_read также можно задавать
 в конфигурации Vitastor с префиксом `antietcd_`.
 
+Смотрите также настройки [antietcd_cert](security.ru.md#antietcd_cert),
+[antietcd_key](security.ru.md#antietcd_key) и [etcd_proxy](security.ru.md#etcd_proxyurls).
+
 Вы можете выгружать/загружать данные в или из antietcd с помощью его инструмента
 `anticli`:
 

docs/config/network.en.md

@@ -33,6 +33,7 @@ between clients, OSDs and etcd.
 - [etcd_ws_keepalive_interval](#etcd_ws_keepalive_interval)
 - [etcd_min_reload_interval](#etcd_min_reload_interval)
 - [tcp_header_buffer_size](#tcp_header_buffer_size)
+- [rxbounce](#rxbounce)
 - [min_zerocopy_send_size](#min_zerocopy_send_size)
 - [use_sync_send_recv](#use_sync_send_recv)
 
@@ -303,6 +304,21 @@ is received without an additional copy. You can try to play with this
 parameter and see how it affects random iops and linear bandwidth if you
 want.
 
+## rxbounce
+
+- Type: boolean
+- Default: false
+- Can be changed online: yes
+
+Receive all TCP data into an intermediate buffer before copying to the actual
+destination. Enabling this option is required for Windows guests if you use TCP
+and [security.en.md#proto_checksums](proto_checksums) because Windows uses a
+shared system-wide 'dummy page' to skip unneeded blocks during reads and breaks
+checksum verification with it when data copy is avoided. rxbounce is only needed
+when you use TCP and don't use transport encryption (AES-GCM); it's not required
+with RDMA or with GCM encryption because both always copy data anyway (yes, RDMA
+isn't actually zerocopy in Vitastor).
+
 ## min_zerocopy_send_size
 
 - Type: integer

docs/config/network.ru.md

@@ -33,6 +33,7 @@
 - [etcd_ws_keepalive_interval](#etcd_ws_keepalive_interval)
 - [etcd_min_reload_interval](#etcd_min_reload_interval)
 - [tcp_header_buffer_size](#tcp_header_buffer_size)
+- [rxbounce](#rxbounce)
 - [min_zerocopy_send_size](#min_zerocopy_send_size)
 - [use_sync_send_recv](#use_sync_send_recv)
 
@@ -310,6 +311,22 @@ Vitastor содержат 128-байтные заголовки, за котор
 поменять этот параметр и посмотреть, как он влияет на производительность
 случайного и линейного доступа.
 
+## rxbounce
+
+- Тип: булево (да/нет)
+- Значение по умолчанию: false
+- Можно менять на лету: да
+
+Принимать все данные по TCP в промежуточный буфер и потом копировать их в
+буфер клиента (ВМ). Это нужно для гостевых ОС Windows с TCP и включёнными
+[security.ru.md#proto_checksums](proto_checksums), потому что Windows использует
+одну разделяемую общесистемную страницу-заглушку для пропуска ненужных блоков
+при чтении и ломает проверку контрольных сумм, если данные не копируются лишний
+раз. Опция rxbounce нужна только если вы используете TCP и не используете
+транспортное шифрование (AES-GCM); с RDMA или шифрованием опция не нужна, так
+как в этом случае данные копируются всегда (да, RDMA в Vitastor на самом деле
+не zero-copy).
+
 ## min_zerocopy_send_size
 
 - Тип: целое число

docs/config/osd.en.md

@@ -70,6 +70,7 @@ with an OSD restart or, for some of them, even without restarting by updating co
 - [use_atomic_flag](#use_atomic_flag)
 - [pg_reshard_chunk_size](#pg_reshard_chunk_size)
 - [pg_reshard_chunk_pause_ms](#pg_reshard_chunk_pause_ms)
+- [gc_on_start](#gc_on_start)
 
 ## bind_address
 
@@ -753,3 +754,9 @@ This option sets the maximum number of object is a chunk. Moving 100k objects us
 - Default: 100
 
 This option sets the interval between handling two PG count change chunks.
+
+## gc_on_start
+
+- Type: boolean
+
+Forcibly clean all garbage entries in the new store on every OSD restart.

docs/config/osd.ru.md

@@ -71,6 +71,7 @@
 - [use_atomic_flag](#use_atomic_flag)
 - [pg_reshard_chunk_size](#pg_reshard_chunk_size)
 - [pg_reshard_chunk_pause_ms](#pg_reshard_chunk_pause_ms)
+- [gc_on_start](#gc_on_start)
 
 ## bind_address
 
@@ -793,3 +794,9 @@ pg_minsize OSD во время переключений, что может по
 - Значение по умолчанию: 100
 
 Данная опция задаёт интервал между обработкой двух порций изменения числа PG пулов.
+
+## gc_on_start
+
+- Тип: булево (да/нет)
+
+Принудительно очищать все мусорные записи в новом хранилище при каждом запуске OSD.

docs/config/security.en.md

@@ -10,13 +10,37 @@ These parameters affect your Vitastor installation security and apply to OSDs, m
 
 Most of them can be set in /etc/vitastor/vitastor.conf and in etcd, but don't support online modification.
 
+All certificate and private key parameters mentioned may contain a path to a PEM file or just
+a PEM string with certificate or a private key. In the latter case, the string must begin with
+"-----BEGIN CERTIFICATE-----" or "-----BEGIN PRIVATE KEY-----".
+
+- [use_perms](#use_perms)
+- [cert](#cert)
+- [pkey](#pkey)
+- [etcd_ca](#etcd_ca)
+- [client_ca](#client_ca)
+- [admin_ca](#admin_ca)
+- [osd_ca](#osd_ca)
+- [mon_ca](#mon_ca)
+- [antietcd_cert](#antietcd_cert)
+- [antietcd_key](#antietcd_key)
+- [etcd_proxy.urls](#etcd_proxyurls)
+- [etcd_proxy.cert](#etcd_proxycert)
+- [etcd_proxy.key](#etcd_proxykey)
+- [etcd_proxy.ca](#etcd_proxyca)
+- [osd_cert](#osd_cert)
+- [osd_pkey](#osd_pkey)
+- [api_cert](#api_cert)
+- [api_pkey](#api_pkey)
 - [etcd_client_cert](#etcd_client_cert)
 - [etcd_client_key](#etcd_client_key)
-- [etcd_ca](#etcd_ca)
 - [osd_etcd_client_cert](#osd_etcd_client_cert)
 - [osd_etcd_client_key](#osd_etcd_client_key)
 - [mon_etcd_client_cert](#mon_etcd_client_cert)
 - [mon_etcd_client_key](#mon_etcd_client_key)
+- [proto_checksums](#proto_checksums)
+- [force_proto_checksums](#force_proto_checksums)
+- [max_cipher_pool_size](#max_cipher_pool_size)
 - [vault_url](#vault_url)
 - [vault_secret_api_path](#vault_secret_api_path)
 - [vault_client_cert](#vault_client_cert)
@@ -25,54 +49,201 @@ Most of them can be set in /etc/vitastor/vitastor.conf and in etcd, but don't su
 - [vault_timeout_ms](#vault_timeout_ms)
 - [vault_error_timeout_sec](#vault_error_timeout_sec)
 - [vault_refresh_leeway_sec](#vault_refresh_leeway_sec)
-- [max_aes_xts_pool_size](#max_aes_xts_pool_size)
 
-## etcd_client_cert
+## use_perms
+
+- Type: boolean
+- Default: false
+
+Enable client permissions in a Vitastor cluster, including Antietcd built into the Monitor.
+Requires configured encryption. Also note that separate Antietcd requires separate configuration
+to use permissions (see [security documentation](../usage/security.en.md) for details).
+
+## cert
 
 - Type: string
 
-Client TLS certificate to use for Vitastor client (not OSD and not monitor)
-etcd https connections. May be path to a file or just a PEM string with certificate.
-In the latter case, string must begin with "-----BEGIN CERTIFICATE-----".
+Client certificate of the current Vitastor user. Required for Vitastor protocol encryption.
+Must be signed with [client_ca](#client_ca). Also used as the client certificate for etcd/Antietcd
+connections by default.
 
-## etcd_client_key
+## pkey
 
 - Type: string
 
-Private key for etcd_client_cert (also a file or a PEM string).
+Private key of the current Vitastor user.
 
 ## etcd_ca
 
 - Type: string
 
-Trusted TLS CA to verify etcd server certificate. May be path to a file,
-directory or just a PEM string with certificate.
+Trusted TLS CA to verify etcd server certificate. Or just the etcd server's
+certificate itself - it's fine to use it for etcd_ca.
+
+## client_ca
+
+- Type: string
+
+Trusted TLS CA to verify Vitastor client certificates.
+Mandatory for Vitastor protocol encryption.
+
+## admin_ca
+
+- Type: string
+
+Trusted TLS CA to verify Vitastor administrator certificates.
+
+## osd_ca
+
+- Type: string
+
+Trusted TLS CA to verify Vitastor OSD certificates. Also mandatory for Vitastor protocol
+encryption. Must be different from client_ca. May be equal to osd_cert - different OSDs
+don't require separate certificates at the moment because their permissions don't differ.
+
+## mon_ca
+
+- Type: string
+
+Trusted TLS CA to verify Vitastor Monitor certificates. Used only for separate Antietcd,
+not required when a monitor built-in Antietcd is used. May be equal to mon_client_etcd_cert.
+
+## antietcd_cert
+
+- Type: string
+
+Server TLS certificate for Antietcd built into the Monitor.
+
+## antietcd_key
+
+- Type: string
+
+Private key for antietcd_cert.
+
+## etcd_proxy.urls
+
+- Type: string or array of strings
+
+etcd URLs for Antietcd etcd proxy mode.
+See [Mon as Etcd proxy](../usage/security.en.md#mon-as-etcd-proxy) for details.
+
+## etcd_proxy.cert
+
+- Type: string
+
+Client certificate for Antietcd connections to etcd in proxy mode.
+
+## etcd_proxy.key
+
+- Type: string
+
+Private key for etcd_proxy.cert.
+
+## etcd_proxy.ca
+
+- Type: string
+
+Trusted TLS CA to verify etcd server certificate when connecting to it from Antietcd.
+
+## osd_cert
+
+- Type: string
+
+Vitastor OSD server certificate. Required for Vitastor protocol encryption. May be equal
+to [osd_ca](#osd_ca) - all OSDs share the same permission set for now. Also used as the client
+certificate for connections from OSD to etcd/Antietcd by default.
+
+## osd_pkey
+
+- Type: string
+
+Private key for osd_cert.
+
+## api_cert
+
+- Type: string
+
+Server TLS certificate for [vitastor-cli serve](../usage/cli.en.md#serve) API server.
+
+## api_pkey
+
+- Type: string
+
+Private key for api_cert.
+
+## etcd_client_cert
+
+- Type: string
+
+Client TLS certificate to use for connections from Vitastor clients to etcd/Antietcd if you don't want
+to use the common client certificate [cert](#cert).
+
+## etcd_client_key
+
+- Type: string
+
+Private key for etcd_client_cert.
 
 ## osd_etcd_client_cert
 
 - Type: string
 
-Same as [etcd_client_cert](#etcd_client_cert), but only for OSDs.
-OSDs, clients and monitors should have different permissions, so they should
-use different certificates.
+Client TLS certificate to use for connections from Vitastor OSDs to etcd/Antietcd if you don't want
+to use the common OSD certificate [osd_cert](#osd_cert).
 
 ## osd_etcd_client_key
 
 - Type: string
 
-Same as [etcd_client_key](#etcd_client_key), but only for OSDs.
+Private key for osd_etcd_client_cert.
 
 ## mon_etcd_client_cert
 
 - Type: string
 
-Same as [etcd_client_cert](#etcd_client_cert), but only for Vitastor monitors.
+Client TLS certificate to use for connections from Vitastor Monitors to etcd/Antietcd - required
+if you don't use the built-in Antietcd. In case you use it Monitor has direct access to Antietcd data
+and doesn't require any connection.
 
 ## mon_etcd_client_key
 
 - Type: string
 
-Same as [etcd_client_key](#etcd_client_key), but only for Vitastor monitors.
+Private key for mon_etcd_client_cert.
+
+## proto_checksums
+
+- Type: string
+- Default: payload
+
+One of "full", "payload", "gcm", "none":
+- "full" means calculate and verify transport level checksums from the full message data
+  including the header - recommended for unencrypted setups.
+- "payload" enables checksums only for the actual read/write data, but skips them for message
+  headers - recommended for encrypted setups because headers are already protected by AES-GCM.
+- "gcm" disables checksums and enables AES-GCM encryption of the whole messages including headers
+  and data - AES-GCM already includes MAC which is actually a stronger checksum. This option is
+  slower and is only recommended for untrusted networks.
+- "none" disables transport level checksums at all.
+
+## force_proto_checksums
+
+- Type: string
+
+To allow older clients to connect to a Vitastor cluster with enabled checksums, Vitastor OSDs
+allow clients to downgrade their proto_checksums by default. force_proto_checksums sets the
+minimum security level allowed for connecting clients. When encryption is disabled, default
+force_proto_checksums is none and clients without checksums are allowed. With enabled
+encryption, force_proto_checksums becomes "payload" by default to block unauthenticated data
+on the transport level.
+
+## max_cipher_pool_size
+
+- Type: integer
+- Default: 256
+
+Maximum number of OpenSSL cipher contexts cached in OSD memory, counted separately
+for each cipher and for encryption/decryption. Probably doesn't require modification.
 
 ## vault_url
 
@@ -103,14 +274,14 @@ Vault v1 secret API mount path to use.
 
 - Type: string
 
-Client TLS certificate to use for Vault connections. Just like [etcd_client_cert](#etcd_client_cert),
-may be path to a file or just a certificate in PEM string.
+Client TLS certificate to use for Vault connections if you don't want to use the common Vitastor
+client certificate [cert](#cert) which is also used for Vault connections by default.
 
 ## vault_client_key
 
 - Type: string
 
-Private key for vault_client_cert (also a file or a PEM string).
+Private key for the vault_client_cert certificate.
 
 ## vault_ca
 
@@ -140,11 +311,3 @@ Time (in seconds) to wait before retrying after receiving an error from Vault.
 
 Extra time (in seconds) before real Vault token lease_timeout to refresh it, just
 in case of system clock drift.
-
-## max_aes_xts_pool_size
-
-- Type: integer
-- Default: 256
-
-Maximum number of OpenSSL encryption contexts cached in OSD memory. Probably
-doesn't require modification.

docs/config/security.ru.md

@@ -12,13 +12,37 @@ OSD, мониторами и клиентами.
 Большая их часть может задаваться в /etc/vitastor/vitastor.conf и в etcd, но не
 поддерживает онлайн-изменение.
 
+Все параметры сертификатов и закрытых ключей могут быть путём к файлу или просто
+строкой с сертификатом в формате PEM. В последнем случае строка должна начинаться с
+"-----BEGIN CERTIFICATE-----" или "-----BEGIN PRIVATE KEY-----".
+
+- [use_perms](#use_perms)
+- [cert](#cert)
+- [pkey](#pkey)
+- [etcd_ca](#etcd_ca)
+- [client_ca](#client_ca)
+- [admin_ca](#admin_ca)
+- [osd_ca](#osd_ca)
+- [mon_ca](#mon_ca)
+- [antietcd_cert](#antietcd_cert)
+- [antietcd_key](#antietcd_key)
+- [etcd_proxy.urls](#etcd_proxyurls)
+- [etcd_proxy.cert](#etcd_proxycert)
+- [etcd_proxy.key](#etcd_proxykey)
+- [etcd_proxy.ca](#etcd_proxyca)
+- [osd_cert](#osd_cert)
+- [osd_pkey](#osd_pkey)
+- [api_cert](#api_cert)
+- [api_pkey](#api_pkey)
 - [etcd_client_cert](#etcd_client_cert)
 - [etcd_client_key](#etcd_client_key)
-- [etcd_ca](#etcd_ca)
 - [osd_etcd_client_cert](#osd_etcd_client_cert)
 - [osd_etcd_client_key](#osd_etcd_client_key)
 - [mon_etcd_client_cert](#mon_etcd_client_cert)
 - [mon_etcd_client_key](#mon_etcd_client_key)
+- [proto_checksums](#proto_checksums)
+- [force_proto_checksums](#force_proto_checksums)
+- [max_cipher_pool_size](#max_cipher_pool_size)
 - [vault_url](#vault_url)
 - [vault_secret_api_path](#vault_secret_api_path)
 - [vault_client_cert](#vault_client_cert)
@@ -27,56 +51,205 @@ OSD, мониторами и клиентами.
 - [vault_timeout_ms](#vault_timeout_ms)
 - [vault_error_timeout_sec](#vault_error_timeout_sec)
 - [vault_refresh_leeway_sec](#vault_refresh_leeway_sec)
-- [max_aes_xts_pool_size](#max_aes_xts_pool_size)
 
-## etcd_client_cert
+## use_perms
+
+- Тип: булево (да/нет)
+- Значение по умолчанию: false
+
+Включает клиентские привилегии в кластере Vitastor, в том числе во встроенном в мониторе Antietcd.
+Требует настроенного шифрования протокола. Также обратите внимание, что отдельно установленный Antietcd
+требует отдельной настройки привилегий (подробности смотрите в [документации безопасности](../usage/security.ru.md)).
+
+## cert
 
 - Тип: строка
 
-Клиентский TLS сертификат для https-подключений к etcd для клиентов Vitastor
-(не OSD и не мониторов). Может быть путём к файлу или просто строкой с
-сертификатом в формате PEM. В последнем случае строка должна начинаться с
-"-----BEGIN CERTIFICATE-----".
+Клиентский сертификат текущего пользователя Vitastor. Требуется для шифрования протокола Vitastor.
+Должен быть подписан [client_ca](#client_ca). Также по умолчанию используется как клиентский
+сертификат для подключения к etcd/Antietcd и Vault.
 
-## etcd_client_key
+## pkey
 
 - Тип: строка
 
-Закрытый ключ для сертификата etcd_client_cert (также путь к файлу или PEM строка).
+Закрытый ключ текущего пользователя Vitastor.
 
 ## etcd_ca
 
 - Тип: строка
 
 Доверенный корневой TLS-сертификат для проверки сертификата сервера etcd.
-Может быть путём к файлу, директории или просто строкой с сертификатом в
-формате PEM.
+Либо же просто сам сертификат сервера etcd - его можно использовать как etcd_ca.
+
+## client_ca
+
+- Тип: строка
+
+Доверенный TLS-сертификат для проверки сертификатов клиентов Vitastor.
+Требуется для шифрования протокола Vitastor.
+
+## admin_ca
+
+- Тип: строка
+
+Доверенный TLS-сертификат для проверки сертификатов администраторов Vitastor.
+
+## osd_ca
+
+- Тип: строка
+
+Доверенный TLS-сертификат для проверки сертификатов OSD Vitastor. Также обязателен
+для шифрования протокола Vitastor. Должен отличаться от client_ca. Может быть равен
+osd_cert - разные OSD не требуют разных сертификатов, потому что на данный момент
+привилегии разных OSD никак не отличаются.
+
+## mon_ca
+
+- Тип: строка
+
+Доверенный TLS-сертификат для проверки сертификатов мониторов Vitastor. Используется
+только отдельно установленным Antietcd, не требуется при использовании встроенного в монитор
+Antietcd. Может быть равен mon_client_etcd_cert.
+
+## antietcd_cert
+
+- Тип: строка
+
+Серверный TLS-сертификат для Antietcd, встроенного в монитор.
+
+## antietcd_key
+
+- Тип: строка
+
+Закрытый ключ для сертификата antietcd_cert.
+
+## etcd_proxy.urls
+
+- Тип: строка или массив строк
+
+Адреса etcd для режима Antietcd etcd-прокси.
+Смотрите подробности в разделе [Mon в роли Etcd proxy](../usage/security.ru.md#mon-в-роли-etcd-proxy).
+
+## etcd_proxy.cert
+
+- Тип: строка
+
+Клиентский сертификат для подключений от Antietcd к etcd в режиме прокси.
+
+## etcd_proxy.key
+
+- Тип: строка
+
+Закрытый ключ для сертификата etcd_proxy.cert.
+
+## etcd_proxy.ca
+
+- Тип: строка
+
+Доверенный TLS-сертификат для проверки сертификата сервера etcd при подключениях от Antietcd.
+
+## osd_cert
+
+- Тип: строка
+
+Сертификат сервера Vitastor OSD. Требуется для шифрования протокола Vitastor. Может быть равен
+[osd_ca](#osd_ca) - все OSD на данный момент имеют одинаковые привилегии. Также по умолчанию
+используется как клиентский сертификат для подключения от OSD к etcd/Antietcd.
+
+## osd_pkey
+
+- Тип: строка
+
+Закрытый ключ для сертификата osd_cert.
+
+## api_cert
+
+- Тип: строка
+
+Серверный TLS-сертификат для API-сервера [vitastor-cli serve](../usage/cli.ru.md#serve).
+
+## api_pkey
+
+- Тип: строка
+
+Закрытый ключ для сертификата api_cert.
+
+## etcd_client_cert
+
+- Тип: строка
+
+Клиентский TLS сертификат для подключений от клиентов Vitastor к etcd/Antietcd, если вы не хотите
+использовать общий клиентский сертификат [cert](#cert).
+
+## etcd_client_key
+
+- Тип: строка
+
+Закрытый ключ для сертификата etcd_client_cert.
 
 ## osd_etcd_client_cert
 
 - Тип: строка
 
-Аналогично [etcd_client_cert](#etcd_client_cert), но только для OSD.
-OSD, клиенты и мониторы должны иметь разные привилегии, поэтому они должны
-использовать разные сертификаты.
+Клиентский TLS сертификат для подключений от Vitastor OSD к etcd/Antietcd, если вы не хотите
+использовать общий сертификат OSD [osd_cert](#osd_cert).
 
 ## osd_etcd_client_key
 
 - Тип: строка
 
-Аналогично [etcd_client_key](#etcd_client_key), но только для OSD.
+Закрытый ключ для сертификата osd_etcd_client_cert.
 
 ## mon_etcd_client_cert
 
 - Тип: строка
 
-Аналогично [etcd_client_cert](#etcd_client_cert), но только для мониторов Vitastor.
+Клиентский TLS сертификат для подключений от мониторов Vitastor к etcd/Antietcd - требуется, если
+вы не используете встроенный в монитор Antietcd. Если вы используете его, то монитор и так имеет
+прямой доступ к данным Antietcd и не требует никаких соединений.
 
 ## mon_etcd_client_key
 
 - Тип: строка
 
-Аналогично [etcd_client_key](#etcd_client_key), но только для мониторов Vitastor.
+Закрытый ключ для сертификата mon_etcd_client_cert.
+
+## proto_checksums
+
+- Тип: строка
+- Значение по умолчанию: payload
+
+Одно из значений "full", "payload", "gcm" и "none":
+- "full" означает расчёт и проверку контрольных сумм на транспортном уровне от полных сообщений,
+  включая их заголовки и данные - рекомендуется для кластеров без шифрования.
+- "payload" включает контрольные суммы только для данных сообщений, но пропускает заголовки -
+  такая настройка рекомендуется для кластеров с включённым шифрованием, потому что в них заголовки
+  и так защищены шифрованием AES-GCM.
+- "gcm" отключает контрольные суммы и включает шифрование полных сообщений включая заголовки и
+  данные - AES-GCM уже включает в себя MAC, который по сути является криптостойкой контрольной
+  суммой. Такая настройка медленнее и рекомендуется только для недоверенных сетей.
+- "none" полностью отключает контрольные суммы на транспортном уровне.
+
+## force_proto_checksums
+
+- Тип: строка
+
+Чтобы старые клиенты Vitastor могли подключаться к кластеру с включёнными контрольными
+суммами, Vitastor OSD по умолчанию разрешают клиентам отключать контрольные суммы
+данных (proto_checksums). Настройка force_proto_checksums задаёт минимальный уровень
+безопасности, разрешённый для подключающихся клиентов. Когда шифрование отключено,
+force_proto_checksums по умолчанию равно none и подключения клиентов без контрольных
+сумм разрешаются. При включённом шифровании значение по умолчанию force_proto_checksums
+становится "payload", чтобы блокировать подключения с неаутентифицированными данными.
+
+## max_cipher_pool_size
+
+- Тип: целое число
+- Значение по умолчанию: 256
+
+Максимальное количество кэшируемых в памяти OSD контекстов шифра OpenSSL, учитываемое
+отдельно для каждого шифра и для шифрования и расшифровки. Вряд ли требует изменения.
 
 ## vault_url
 
@@ -106,14 +279,14 @@ OSD, клиенты и мониторы должны иметь разные п
 
 - Тип: строка
 
-Клиентский TLS сертификат для подключений к Vault. Как и [etcd_client_cert](#etcd_client_cert),
-может быть путём к файлу или просто PEM-строкой с сертификатом.
+Клиентский TLS сертификат для подключений к Vault на тот случай, если вы не хотите использовать
+общий сертификат клиента Vitastor [cert](#cert), используемый для подключений к Vault по умолчанию.
 
 ## vault_client_key
 
 - Тип: строка
 
-Закрытый ключ для сертификата vault_client_cert (также путь к файлу или PEM строка).
+Закрытый ключ для сертификата vault_client_cert.
 
 ## vault_ca
 
@@ -144,11 +317,3 @@ OSD, клиенты и мониторы должны иметь разные п
 
 Зазор времени (в секундах), чтобы обновлять токены Vault чуть раньше их реального
 lease_timeout, на случай "ухода" системных часов.
-
-## max_aes_xts_pool_size
-
-- Тип: целое число
-- Значение по умолчанию: 256
-
-Максимальное количество кэшируемых в памяти OSD контекстов шифрования OpenSSL.
-Вряд ли требует изменения.

docs/config/src/included.en.md

@@ -66,6 +66,8 @@
 
 {{../../usage/nfs.en.md}}
 
+{{../../usage/security.en.md}}
+
 {{../../usage/admin.en.md}}
 
 ## Performance

docs/config/src/included.ru.md

@@ -66,6 +66,8 @@
 
 {{../../usage/nfs.ru.md}}
 
+{{../../usage/security.ru.md}}
+
 {{../../usage/admin.ru.md}}
 
 ## Производительность

docs/config/src/make.js

@@ -64,7 +64,7 @@ for (const file of params_files)
         let out = '\n';
         for (const c of cfg)
         {
-            out += `\n- [${c.name}](#${c.name})`;
+            out += `\n- [${c.name}](#${c.name.replace(/\./g, '')})`;
         }
         for (const c of cfg)
         {

docs/config/src/monitor.yml

@@ -21,6 +21,9 @@
     cluster, cluster_key, persist_filter, stale_read can also be set in
     Vitastor configuration with `antietcd_` prefix.
 
+    See also: [antietcd_cert](security.en.md#antietcd_cert),
+    [antietcd_key](security.en.md#antietcd_key) and [etcd_proxy](security.en.md#etcd_proxyurls).
+
     You can dump/load data to or from antietcd using Antietcd `anticli` tool:
 
     ```
@@ -47,6 +50,9 @@
     node_id, cluster, cluster_key, persist_filter, stale_read также можно задавать
     в конфигурации Vitastor с префиксом `antietcd_`.
 
+    Смотрите также настройки [antietcd_cert](security.ru.md#antietcd_cert),
+    [antietcd_key](security.ru.md#antietcd_key) и [etcd_proxy](security.ru.md#etcd_proxyurls).
+
     Вы можете выгружать/загружать данные в или из antietcd с помощью его инструмента
     `anticli`:
 

docs/config/src/network.yml

@@ -358,6 +358,29 @@
     параметра читается без дополнительного копирования. Вы можете попробовать
     поменять этот параметр и посмотреть, как он влияет на производительность
     случайного и линейного доступа.
+- name: rxbounce
+  type: bool
+  default: false
+  online: true
+  info: |
+    Receive all TCP data into an intermediate buffer before copying to the actual
+    destination. Enabling this option is required for Windows guests if you use TCP
+    and [security.en.md#proto_checksums](proto_checksums) because Windows uses a
+    shared system-wide 'dummy page' to skip unneeded blocks during reads and breaks
+    checksum verification with it when data copy is avoided. rxbounce is only needed
+    when you use TCP and don't use transport encryption (AES-GCM); it's not required
+    with RDMA or with GCM encryption because both always copy data anyway (yes, RDMA
+    isn't actually zerocopy in Vitastor).
+  info_ru: |
+    Принимать все данные по TCP в промежуточный буфер и потом копировать их в
+    буфер клиента (ВМ). Это нужно для гостевых ОС Windows с TCP и включёнными
+    [security.ru.md#proto_checksums](proto_checksums), потому что Windows использует
+    одну разделяемую общесистемную страницу-заглушку для пропуска ненужных блоков
+    при чтении и ломает проверку контрольных сумм, если данные не копируются лишний
+    раз. Опция rxbounce нужна только если вы используете TCP и не используете
+    транспортное шифрование (AES-GCM); с RDMA или шифрованием опция не нужна, так
+    как в этом случае данные копируются всегда (да, RDMA в Vitastor на самом деле
+    не zero-copy).
 - name: min_zerocopy_send_size
   type: int
   default: 32768

docs/config/src/osd.yml

@@ -938,3 +938,7 @@
     This option sets the interval between handling two PG count change chunks.
   info_ru: |
     Данная опция задаёт интервал между обработкой двух порций изменения числа PG пулов.
+- name: gc_on_start
+  type: bool
+  info: Forcibly clean all garbage entries in the new store on every OSD restart.
+  info_ru: Принудительно очищать все мусорные записи в новом хранилище при каждом запуске OSD.

docs/config/src/security.en.md

@@ -3,3 +3,7 @@
 These parameters affect your Vitastor installation security and apply to OSDs, monitors and clients.
 
 Most of them can be set in /etc/vitastor/vitastor.conf and in etcd, but don't support online modification.
+
+All certificate and private key parameters mentioned may contain a path to a PEM file or just
+a PEM string with certificate or a private key. In the latter case, the string must begin with
+"-----BEGIN CERTIFICATE-----" or "-----BEGIN PRIVATE KEY-----".

docs/config/src/security.ru.md

@@ -5,3 +5,7 @@ OSD, мониторами и клиентами.
 
 Большая их часть может задаваться в /etc/vitastor/vitastor.conf и в etcd, но не
 поддерживает онлайн-изменение.
+
+Все параметры сертификатов и закрытых ключей могут быть путём к файлу или просто
+строкой с сертификатом в формате PEM. В последнем случае строка должна начинаться с
+"-----BEGIN CERTIFICATE-----" или "-----BEGIN PRIVATE KEY-----".

docs/config/src/security.yml

@@ -1,49 +1,209 @@
-- name: etcd_client_cert
+- name: use_perms
+  type: bool
+  default: false
+  info: |
+    Enable client permissions in a Vitastor cluster, including Antietcd built into the Monitor.
+    Requires configured encryption. Also note that separate Antietcd requires separate configuration
+    to use permissions (see [security documentation](../usage/security.en.md) for details).
+  info_ru: |
+    Включает клиентские привилегии в кластере Vitastor, в том числе во встроенном в мониторе Antietcd.
+    Требует настроенного шифрования протокола. Также обратите внимание, что отдельно установленный Antietcd
+    требует отдельной настройки привилегий (подробности смотрите в [документации безопасности](../usage/security.ru.md)).
+- name: cert
   type: string
   info: |
-    Client TLS certificate to use for Vitastor client (not OSD and not monitor)
-    etcd https connections. May be path to a file or just a PEM string with certificate.
-    In the latter case, string must begin with "-----BEGIN CERTIFICATE-----".
+    Client certificate of the current Vitastor user. Required for Vitastor protocol encryption.
+    Must be signed with [client_ca](#client_ca). Also used as the client certificate for etcd/Antietcd
+    connections by default.
   info_ru: |
-    Клиентский TLS сертификат для https-подключений к etcd для клиентов Vitastor
-    (не OSD и не мониторов). Может быть путём к файлу или просто строкой с
-    сертификатом в формате PEM. В последнем случае строка должна начинаться с
-    "-----BEGIN CERTIFICATE-----".
-- name: etcd_client_key
+    Клиентский сертификат текущего пользователя Vitastor. Требуется для шифрования протокола Vitastor.
+    Должен быть подписан [client_ca](#client_ca). Также по умолчанию используется как клиентский
+    сертификат для подключения к etcd/Antietcd и Vault.
+- name: pkey
   type: string
-  info: Private key for etcd_client_cert (also a file or a PEM string).
-  info_ru: Закрытый ключ для сертификата etcd_client_cert (также путь к файлу или PEM строка).
+  info: Private key of the current Vitastor user.
+  info_ru: Закрытый ключ текущего пользователя Vitastor.
 - name: etcd_ca
   type: string
   info: |
-    Trusted TLS CA to verify etcd server certificate. May be path to a file,
-    directory or just a PEM string with certificate.
+    Trusted TLS CA to verify etcd server certificate. Or just the etcd server's
+    certificate itself - it's fine to use it for etcd_ca.
   info_ru: |
     Доверенный корневой TLS-сертификат для проверки сертификата сервера etcd.
-    Может быть путём к файлу, директории или просто строкой с сертификатом в
-    формате PEM.
+    Либо же просто сам сертификат сервера etcd - его можно использовать как etcd_ca.
+- name: client_ca
+  type: string
+  info: |
+    Trusted TLS CA to verify Vitastor client certificates.
+    Mandatory for Vitastor protocol encryption.
+  info_ru: |
+    Доверенный TLS-сертификат для проверки сертификатов клиентов Vitastor.
+    Требуется для шифрования протокола Vitastor.
+- name: admin_ca
+  type: string
+  info: |
+    Trusted TLS CA to verify Vitastor administrator certificates.
+  info_ru: |
+    Доверенный TLS-сертификат для проверки сертификатов администраторов Vitastor.
+- name: osd_ca
+  type: string
+  info: |
+    Trusted TLS CA to verify Vitastor OSD certificates. Also mandatory for Vitastor protocol
+    encryption. Must be different from client_ca. May be equal to osd_cert - different OSDs
+    don't require separate certificates at the moment because their permissions don't differ.
+  info_ru: |
+    Доверенный TLS-сертификат для проверки сертификатов OSD Vitastor. Также обязателен
+    для шифрования протокола Vitastor. Должен отличаться от client_ca. Может быть равен
+    osd_cert - разные OSD не требуют разных сертификатов, потому что на данный момент
+    привилегии разных OSD никак не отличаются.
+- name: mon_ca
+  type: string
+  info: |
+    Trusted TLS CA to verify Vitastor Monitor certificates. Used only for separate Antietcd,
+    not required when a monitor built-in Antietcd is used. May be equal to mon_client_etcd_cert.
+  info_ru: |
+    Доверенный TLS-сертификат для проверки сертификатов мониторов Vitastor. Используется
+    только отдельно установленным Antietcd, не требуется при использовании встроенного в монитор
+    Antietcd. Может быть равен mon_client_etcd_cert.
+- name: antietcd_cert
+  type: string
+  info: Server TLS certificate for Antietcd built into the Monitor.
+  info_ru: Серверный TLS-сертификат для Antietcd, встроенного в монитор.
+- name: antietcd_key
+  type: string
+  info: Private key for antietcd_cert.
+  info_ru: Закрытый ключ для сертификата antietcd_cert.
+- name: etcd_proxy.urls
+  type: string or array of strings
+  type_ru: строка или массив строк
+  info: |
+    etcd URLs for Antietcd etcd proxy mode.
+    See [Mon as Etcd proxy](../usage/security.en.md#mon-as-etcd-proxy) for details.
+  info_ru: |
+    Адреса etcd для режима Antietcd etcd-прокси.
+    Смотрите подробности в разделе [Mon в роли Etcd proxy](../usage/security.ru.md#mon-в-роли-etcd-proxy).
+- name: etcd_proxy.cert
+  type: string
+  info: Client certificate for Antietcd connections to etcd in proxy mode.
+  info_ru: Клиентский сертификат для подключений от Antietcd к etcd в режиме прокси.
+- name: etcd_proxy.key
+  type: string
+  info: Private key for etcd_proxy.cert.
+  info_ru: Закрытый ключ для сертификата etcd_proxy.cert.
+- name: etcd_proxy.ca
+  type: string
+  info: Trusted TLS CA to verify etcd server certificate when connecting to it from Antietcd.
+  info_ru: Доверенный TLS-сертификат для проверки сертификата сервера etcd при подключениях от Antietcd.
+- name: osd_cert
+  type: string
+  info: |
+    Vitastor OSD server certificate. Required for Vitastor protocol encryption. May be equal
+    to [osd_ca](#osd_ca) - all OSDs share the same permission set for now. Also used as the client
+    certificate for connections from OSD to etcd/Antietcd by default.
+  info_ru: |
+    Сертификат сервера Vitastor OSD. Требуется для шифрования протокола Vitastor. Может быть равен
+    [osd_ca](#osd_ca) - все OSD на данный момент имеют одинаковые привилегии. Также по умолчанию
+    используется как клиентский сертификат для подключения от OSD к etcd/Antietcd.
+- name: osd_pkey
+  type: string
+  info: Private key for osd_cert.
+  info_ru: Закрытый ключ для сертификата osd_cert.
+- name: api_cert
+  type: string
+  info: Server TLS certificate for [vitastor-cli serve](../usage/cli.en.md#serve) API server.
+  info_ru: Серверный TLS-сертификат для API-сервера [vitastor-cli serve](../usage/cli.ru.md#serve).
+- name: api_pkey
+  type: string
+  info: Private key for api_cert.
+  info_ru: Закрытый ключ для сертификата api_cert.
+- name: etcd_client_cert
+  type: string
+  info: |
+    Client TLS certificate to use for connections from Vitastor clients to etcd/Antietcd if you don't want
+    to use the common client certificate [cert](#cert).
+  info_ru: |
+    Клиентский TLS сертификат для подключений от клиентов Vitastor к etcd/Antietcd, если вы не хотите
+    использовать общий клиентский сертификат [cert](#cert).
+- name: etcd_client_key
+  type: string
+  info: Private key for etcd_client_cert.
+  info_ru: Закрытый ключ для сертификата etcd_client_cert.
 - name: osd_etcd_client_cert
   type: string
   info: |
-    Same as [etcd_client_cert](#etcd_client_cert), but only for OSDs.
-    OSDs, clients and monitors should have different permissions, so they should
-    use different certificates.
+    Client TLS certificate to use for connections from Vitastor OSDs to etcd/Antietcd if you don't want
+    to use the common OSD certificate [osd_cert](#osd_cert).
   info_ru: |
-    Аналогично [etcd_client_cert](#etcd_client_cert), но только для OSD.
-    OSD, клиенты и мониторы должны иметь разные привилегии, поэтому они должны
-    использовать разные сертификаты.
+    Клиентский TLS сертификат для подключений от Vitastor OSD к etcd/Antietcd, если вы не хотите
+    использовать общий сертификат OSD [osd_cert](#osd_cert).
 - name: osd_etcd_client_key
   type: string
-  info: Same as [etcd_client_key](#etcd_client_key), but only for OSDs.
-  info_ru: Аналогично [etcd_client_key](#etcd_client_key), но только для OSD.
+  info: Private key for osd_etcd_client_cert.
+  info_ru: Закрытый ключ для сертификата osd_etcd_client_cert.
 - name: mon_etcd_client_cert
   type: string
-  info: Same as [etcd_client_cert](#etcd_client_cert), but only for Vitastor monitors.
-  info_ru: Аналогично [etcd_client_cert](#etcd_client_cert), но только для мониторов Vitastor.
+  info: |
+    Client TLS certificate to use for connections from Vitastor Monitors to etcd/Antietcd - required
+    if you don't use the built-in Antietcd. In case you use it Monitor has direct access to Antietcd data
+    and doesn't require any connection.
+  info_ru: |
+    Клиентский TLS сертификат для подключений от мониторов Vitastor к etcd/Antietcd - требуется, если
+    вы не используете встроенный в монитор Antietcd. Если вы используете его, то монитор и так имеет
+    прямой доступ к данным Antietcd и не требует никаких соединений.
 - name: mon_etcd_client_key
   type: string
-  info: Same as [etcd_client_key](#etcd_client_key), but only for Vitastor monitors.
-  info_ru: Аналогично [etcd_client_key](#etcd_client_key), но только для мониторов Vitastor.
+  info: Private key for mon_etcd_client_cert.
+  info_ru: Закрытый ключ для сертификата mon_etcd_client_cert.
+- name: proto_checksums
+  type: string
+  default: payload
+  info: |
+    One of "full", "payload", "gcm", "none":
+    - "full" means calculate and verify transport level checksums from the full message data
+      including the header - recommended for unencrypted setups.
+    - "payload" enables checksums only for the actual read/write data, but skips them for message
+      headers - recommended for encrypted setups because headers are already protected by AES-GCM.
+    - "gcm" disables checksums and enables AES-GCM encryption of the whole messages including headers
+      and data - AES-GCM already includes MAC which is actually a stronger checksum. This option is
+      slower and is only recommended for untrusted networks.
+    - "none" disables transport level checksums at all.
+  info_ru: |
+    Одно из значений "full", "payload", "gcm" и "none":
+    - "full" означает расчёт и проверку контрольных сумм на транспортном уровне от полных сообщений,
+      включая их заголовки и данные - рекомендуется для кластеров без шифрования.
+    - "payload" включает контрольные суммы только для данных сообщений, но пропускает заголовки -
+      такая настройка рекомендуется для кластеров с включённым шифрованием, потому что в них заголовки
+      и так защищены шифрованием AES-GCM.
+    - "gcm" отключает контрольные суммы и включает шифрование полных сообщений включая заголовки и
+      данные - AES-GCM уже включает в себя MAC, который по сути является криптостойкой контрольной
+      суммой. Такая настройка медленнее и рекомендуется только для недоверенных сетей.
+    - "none" полностью отключает контрольные суммы на транспортном уровне.
+- name: force_proto_checksums
+  type: string
+  info: |
+    To allow older clients to connect to a Vitastor cluster with enabled checksums, Vitastor OSDs
+    allow clients to downgrade their proto_checksums by default. force_proto_checksums sets the
+    minimum security level allowed for connecting clients. When encryption is disabled, default
+    force_proto_checksums is none and clients without checksums are allowed. With enabled
+    encryption, force_proto_checksums becomes "payload" by default to block unauthenticated data
+    on the transport level.
+  info_ru: |
+    Чтобы старые клиенты Vitastor могли подключаться к кластеру с включёнными контрольными
+    суммами, Vitastor OSD по умолчанию разрешают клиентам отключать контрольные суммы
+    данных (proto_checksums). Настройка force_proto_checksums задаёт минимальный уровень
+    безопасности, разрешённый для подключающихся клиентов. Когда шифрование отключено,
+    force_proto_checksums по умолчанию равно none и подключения клиентов без контрольных
+    сумм разрешаются. При включённом шифровании значение по умолчанию force_proto_checksums
+    становится "payload", чтобы блокировать подключения с неаутентифицированными данными.
+- name: max_cipher_pool_size
+  type: int
+  default: 256
+  info: |
+    Maximum number of OpenSSL cipher contexts cached in OSD memory, counted separately
+    for each cipher and for encryption/decryption. Probably doesn't require modification.
+  info_ru: |
+    Максимальное количество кэшируемых в памяти OSD контекстов шифра OpenSSL, учитываемое
+    отдельно для каждого шифра и для шифрования и расшифровки. Вряд ли требует изменения.
 - name: vault_url
   type: string
   info: |
@@ -81,15 +241,15 @@
 - name: vault_client_cert
   type: string
   info: |
-    Client TLS certificate to use for Vault connections. Just like [etcd_client_cert](#etcd_client_cert),
-    may be path to a file or just a certificate in PEM string.
+    Client TLS certificate to use for Vault connections if you don't want to use the common Vitastor
+    client certificate [cert](#cert) which is also used for Vault connections by default.
   info_ru: |
-    Клиентский TLS сертификат для подключений к Vault. Как и [etcd_client_cert](#etcd_client_cert),
-    может быть путём к файлу или просто PEM-строкой с сертификатом.
+    Клиентский TLS сертификат для подключений к Vault на тот случай, если вы не хотите использовать
+    общий сертификат клиента Vitastor [cert](#cert), используемый для подключений к Vault по умолчанию.
 - name: vault_client_key
   type: string
-  info: Private key for vault_client_cert (also a file or a PEM string).
-  info_ru: Закрытый ключ для сертификата vault_client_cert (также путь к файлу или PEM строка).
+  info: Private key for the vault_client_cert certificate.
+  info_ru: Закрытый ключ для сертификата vault_client_cert.
 - name: vault_ca
   type: string
   info: |
@@ -120,12 +280,3 @@
   info_ru: |
     Зазор времени (в секундах), чтобы обновлять токены Vault чуть раньше их реального
     lease_timeout, на случай "ухода" системных часов.
-- name: max_aes_xts_pool_size
-  type: int
-  default: 256
-  info: |
-    Maximum number of OpenSSL encryption contexts cached in OSD memory. Probably
-    doesn't require modification.
-  info_ru: |
-    Максимальное количество кэшируемых в памяти OSD контекстов шифрования OpenSSL.
-    Вряд ли требует изменения.

docs/installation/docker.en.md

@@ -26,9 +26,9 @@ at Vitastor Kubernetes operator: https://github.com/Antilles7227/vitastor-operat
 The instruction is very simple.
 
 1. Download a Docker image of the desired version: \
-   `docker pull vitalif/vitastor:v3.0.5`
+   `docker pull vitalif/vitastor:v3.2.1`
 2. Install scripts to the host system: \
-   `docker run --rm -it -v /etc:/host-etc -v /usr/bin:/host-bin vitalif/vitastor:v3.0.5 install.sh`
+   `docker run --rm -it -v /etc:/host-etc -v /usr/bin:/host-bin vitalif/vitastor:v3.2.1 install.sh`
 3. Reload udev rules: \
    `udevadm control --reload-rules`
 4. Enable the vitastor-host service: \

docs/installation/docker.ru.md

@@ -25,9 +25,9 @@ Vitastor можно установить в Docker/Podman. При этом etcd,
 Инструкция по установке максимально простая.
 
 1. Скачайте Docker-образ желаемой версии: \
-   `docker pull vitalif/vitastor:v3.0.5`
+   `docker pull vitalif/vitastor:v3.2.1`
 2. Установите скрипты в хост-систему командой: \
-   `docker run --rm -it -v /etc:/host-etc -v /usr/bin:/host-bin vitalif/vitastor:v3.0.5 install.sh`
+   `docker run --rm -it -v /etc:/host-etc -v /usr/bin:/host-bin vitalif/vitastor:v3.2.1 install.sh`
 3. Перезагрузите правила udev: \
    `udevadm control --reload-rules`
 4. Включите сервис vitastor-host: \

docs/installation/packages.en.md

@@ -14,11 +14,9 @@
   - Debian 13 (Trixie/Sid): `deb https://vitastor.io/debian trixie main`
   - Debian 12 (Bookworm): `deb https://vitastor.io/debian bookworm main`
   - Debian 11 (Bullseye): `deb https://vitastor.io/debian bullseye main`
-  - Debian 10 (Buster): `deb https://vitastor.io/debian buster main`
-  - Ubuntu 22.04 (Jammy): `deb https://vitastor.io/debian jammy main`
+  - Ubuntu 26.04 (Resolute): `deb https://vitastor.io/debian resolute main`
   - Ubuntu 24.04 (Noble): `deb https://vitastor.io/debian noble main`
-  - Add `-oldstable` to bookworm/bullseye/buster in this line to install the last
-    stable version from 0.9.x branch instead of 1.x
+  - Ubuntu 22.04 (Jammy): `deb https://vitastor.io/debian jammy main`
 - To always prefer vitastor-patched QEMU and Libvirt versions, add the following to `/etc/apt/preferences`:
   ```
   Package: *
@@ -30,17 +28,14 @@
 ## CentOS
 
 - Add Vitastor package repository:
-  - CentOS 7: `yum install https://vitastor.io/rpms/centos/7/vitastor-release.rpm`
   - CentOS 8: `dnf install https://vitastor.io/rpms/centos/8/vitastor-release.rpm`
   - AlmaLinux 9 and other RHEL 9 clones (Rocky, Oracle...): `dnf install https://vitastor.io/rpms/centos/9/vitastor-release.rpm`
   - AlmaLinux 10 and other RHEL 10 clones: `dnf install https://vitastor.io/rpms/centos/10/vitastor-release.rpm`
 - Enable EPEL: `yum/dnf install epel-release`
 - Enable additional CentOS repositories:
-  - CentOS 7: `yum install centos-release-scl`
   - CentOS 8: `dnf install centos-release-advanced-virtualization`
   - RHEL 9/10 clones: not required
 - Enable elrepo-kernel:
-  - CentOS 7: `yum install https://www.elrepo.org/elrepo-release-7.el7.elrepo.noarch.rpm`
   - CentOS 8: `dnf install https://www.elrepo.org/elrepo-release-8.el8.elrepo.noarch.rpm`
   - RHEL 9 clones: `dnf install https://www.elrepo.org/elrepo-release-9.el9.elrepo.noarch.rpm`
   - RHEL 10 clones: not required

docs/installation/packages.ru.md

@@ -14,11 +14,9 @@
   - Debian 13 (Trixie/Sid): `deb https://vitastor.io/debian trixie main`
   - Debian 12 (Bookworm): `deb https://vitastor.io/debian bookworm main`
   - Debian 11 (Bullseye): `deb https://vitastor.io/debian bullseye main`
-  - Debian 10 (Buster): `deb https://vitastor.io/debian buster main`
-  - Ubuntu 22.04 (Jammy): `deb https://vitastor.io/debian jammy main`
+  - Ubuntu 26.04 (Resolute): `deb https://vitastor.io/debian resolute main`
   - Ubuntu 24.04 (Noble): `deb https://vitastor.io/debian noble main`
-  - Добавьте `-oldstable` к слову bookworm/bullseye/buster в этой строке, чтобы
-    установить последнюю стабильную версию из ветки 0.9.x вместо 1.x
+  - Ubuntu 22.04 (Jammy): `deb https://vitastor.io/debian jammy main`
 - Чтобы всегда предпочитались версии пакетов QEMU и Libvirt с патчами Vitastor, добавьте в `/etc/apt/preferences`:
   ```
   Package: *
@@ -30,17 +28,14 @@
 ## CentOS
 
 - Добавьте в систему репозиторий Vitastor:
-  - CentOS 7: `yum install https://vitastor.io/rpms/centos/7/vitastor-release.rpm`
   - CentOS 8: `dnf install https://vitastor.io/rpms/centos/8/vitastor-release.rpm`
   - AlmaLinux 9 и другие клоны RHEL 9 (Rocky, Oracle...): `dnf install https://vitastor.io/rpms/centos/9/vitastor-release.rpm`
   - AlmaLinux 10 и другие клоны RHEL 10: `dnf install https://vitastor.io/rpms/centos/10/vitastor-release.rpm`
 - Включите EPEL: `yum/dnf install epel-release`
 - Включите дополнительные репозитории CentOS:
-  - CentOS 7: `yum install centos-release-scl`
   - CentOS 8: `dnf install centos-release-advanced-virtualization`
   - Клоны RHEL 9/10: не нужно
 - Включите elrepo-kernel:
-  - CentOS 7: `yum install https://www.elrepo.org/elrepo-release-7.el7.elrepo.noarch.rpm`
   - CentOS 8: `dnf install https://www.elrepo.org/elrepo-release-8.el8.elrepo.noarch.rpm`
   - Клоны RHEL 9: `dnf install https://www.elrepo.org/elrepo-release-9.el9.elrepo.noarch.rpm`
   - Клоны RHEL 10: не нужно

docs/installation/proxmox.en.md

@@ -6,10 +6,10 @@
 
 # Proxmox VE
 
-To enable Vitastor support in Proxmox Virtual Environment (6.4-9.x are supported):
+To enable Vitastor support in Proxmox Virtual Environment (7.x-9.x are supported):
 
 - Add the corresponding Vitastor Debian repository into sources.list on Proxmox hosts:
-  trixie for 9.0+, bookworm for 8.1+, pve8.0 for 8.0, bullseye for 7.4, pve7.3 for 7.3, pve7.2 for 7.2, pve7.1 for 7.1, buster for 6.4
+  trixie for 9.0+, bookworm for 8.1+, pve8.0 for 8.0, bullseye for 7.4, pve7.3 for 7.3, pve7.2 for 7.2, pve7.1 for 7.1
 - Install vitastor-client, pve-qemu-kvm, pve-storage-vitastor (* or see note) packages from Vitastor repository
 - Define storage in `/etc/pve/storage.cfg` (see below)
 - Block network access from VMs to Vitastor network (to OSDs and etcd),

docs/installation/proxmox.ru.md

@@ -6,10 +6,10 @@
 
 # Proxmox VE
 
-Чтобы подключить Vitastor к Proxmox Virtual Environment (поддерживаются версии 6.4-9.x):
+Чтобы подключить Vitastor к Proxmox Virtual Environment (поддерживаются версии 7.x-9.x):
 
 - Добавьте соответствующий Debian-репозиторий Vitastor в sources.list на хостах Proxmox:
-  trixie для 9.0+, bookworm для 8.1+, pve8.0 для 8.0, bullseye для 7.4, pve7.3 для 7.3, pve7.2 для 7.2, pve7.1 для 7.1, buster для 6.4
+  trixie для 9.0+, bookworm для 8.1+, pve8.0 для 8.0, bullseye для 7.4, pve7.3 для 7.3, pve7.2 для 7.2, pve7.1 для 7.1
 - Установите пакеты vitastor-client, pve-qemu-kvm, pve-storage-vitastor (* или см. сноску) из репозитория Vitastor
 - Определите тип хранилища в `/etc/pve/storage.cfg` (см. ниже)
 - Обязательно заблокируйте доступ от виртуальных машин к сети Vitastor (OSD и etcd), т.к. Vitastor (пока) не поддерживает аутентификацию

docs/installation/source.en.md

@@ -17,7 +17,6 @@
 - CMake
 - jerasure, c-ares headers and libraries
 - ISA-L, libibverbs, librdmacm, libnl3 headers and libraries (optional)
-- tcmalloc (google-perftools-dev)
 
 ## Basic instructions
 

docs/installation/source.ru.md

@@ -17,7 +17,6 @@
 - CMake
 - Заголовки и библиотеки jerasure, c-ares
 - Опционально - заголовки и библиотеки ISA-L, libibverbs, librdmacm, libnl3
-- tcmalloc (google-perftools-dev)
 
 ## Базовая инструкция
 

docs/intro/features.en.md

@@ -41,8 +41,8 @@
 - [Built-in Prometheus metric exporter](../config/monitor.en.md#enable_prometheus)
 - [NFS RDMA support](../usage/nfs.en.md#rdma) (probably also usable for GPUDirect)
 - [S3](../installation/s3.en.md)
-- [TLS support for etcd connections](../config/security.en.md)
-- [AES-256-XTS image encryption](../usage/cli.en.md#create) and [Vault support](../config/security.en.md#vault_url) for key storage
+- [Full transport encryption and access control](../usage/security.en.md)
+- [AES-256-XTS end-to-end image encryption](../usage/security.en.md#end-to-end-image-data-encryption-aes-xts) with [Vault support](../usage/security.en.md#vaultopenbao-setup) for key storage
 
 ## Plugins and tools
 

docs/intro/features.ru.md

@@ -43,8 +43,8 @@
 - [Встроенный Prometheus-экспортер метрик](../config/monitor.ru.md#enable_prometheus)
 - [Поддержка NFS RDMA](../usage/nfs.ru.md#rdma) (вероятно, также подходящая для GPUDirect)
 - [S3](../installation/s3.ru.md)
-- [Поддержка TLS-соединений с etcd](../config/security.ru.md)
-- [AES-256-XTS шифрование данных](../usage/cli.ru.md#create) и [поддержка Vault](../config/security.ru.md#vault_url) для хранения ключей
+- [Полное транспортное шифрование и контроль доступа](../usage/security.ru.md)
+- [AES-256-XTS сквозное шифрование данных](../usage/security.ru.md#сквозное-шифрование-данных-образов-aes-xts) с [поддержкой Vault](../usage/security.ru.md#настройка-vaultopenbao) для хранения ключей
 
 ## Драйверы и инструменты
 

docs/intro/quickstart.en.md

@@ -41,12 +41,16 @@
 ## Configure monitors
 
 On the monitor hosts:
-- Put identical etcd_address into `/etc/vitastor/vitastor.conf`. Example:
+- Create minimal configuration in `/etc/vitastor/vitastor.conf`:
   ```
   {
-    "etcd_address": ["10.200.1.10:2379","10.200.1.11:2379","10.200.1.12:2379"]
+    "etcd_address": ["http://10.200.1.10:2379","http://10.200.1.11:2379","http://10.200.1.12:2379"],
+    "osd_network": "10.200.1.0/24",
+    "use_perms": false
   }
   ```
+- Note that you can enable encryption by using `https://` and `use_perms` option.
+  [Details](security.en.md#quick-setup) about encryption setup with make-etcd.
 - Create systemd units for etcd by running: `/usr/lib/vitastor/mon/make-etcd`
   Or, if you installed Vitastor in Docker, run `systemctl start vitastor-host; docker exec vitastor make-etcd`.
 - Start etcd and monitors: `systemctl enable --now vitastor-etcd vitastor-mon`

docs/intro/quickstart.ru.md

@@ -41,25 +41,23 @@
 ## Настройте мониторы
 
 На хостах, выделенных под мониторы:
-- Пропишите одинаковые etcd_address в `/etc/vitastor/vitastor.conf`. Например:
+- Создайте минимальную конфигурацию в `/etc/vitastor/vitastor.conf`:
   ```
   {
-    "etcd_address": ["10.200.1.10:2379","10.200.1.11:2379","10.200.1.12:2379"]
+    "etcd_address": ["http://10.200.1.10:2379","http://10.200.1.11:2379","http://10.200.1.12:2379"],
+    "osd_network": "10.200.1.0/24",
+    "use_perms": false
   }
   ```
+- Обратите внимание, что с помощью схемы `https://` и опции `use_perms` можно включить шифрование.
+  [Подробно](security.ru.md#быстрая-настройка) о настройке шифрования через make-etcd.
 - Инициализируйте сервисы etcd, запустив `/usr/lib/vitastor/mon/make-etcd`.\
   Либо, если вы установили Vitastor в Docker, запустите `systemctl start vitastor-host; docker exec vitastor make-etcd`.
 - Запустите etcd и мониторы: `systemctl enable --now vitastor-etcd vitastor-mon`
 
 ## Настройте OSD
 
-- Пропишите etcd_address и [osd_network](../config/network.ru.md#osd_network) в `/etc/vitastor/vitastor.conf`. Например:
-  ```
-  {
-    "etcd_address": ["10.200.1.10:2379","10.200.1.11:2379","10.200.1.12:2379"],
-    "osd_network": "10.200.1.0/24"
-  }
-  ```
+- Создайте/скопируйте с узлов с мониторами файл конфигурации `/etc/vitastor/vitastor.conf`.
 - Инициализуйте OSD:
   - Только SSD или только HDD: `vitastor-disk prepare /dev/sdXXX [/dev/sdYYY ...]`.
     Если вы используете десктопные SSD без конденсаторов, добавьте опцию `--disable_data_fsync off`,

docs/usage/cli.en.md

@@ -33,6 +33,11 @@ It supports the following commands:
 - [modify-pool](#modify-pool)
 - [ls-pools](#ls-pools)
 - [rm-pool](#rm-pool)
+- [ls-user](#ls-user)
+- [modify-user](#modify-user)
+- [rm-user](#rm-user)
+- [serve](#serve)
+- [cpubench](#cpubench)
 
 Global options:
 
@@ -107,6 +112,7 @@ Options:
 --sort FIELD    Sort by specified field (name, size, used_size, <read|write|delete>_<iops|bps|lat|queue>)
 -r|--reverse    Sort in descending order
 -n|--count N    Only list first N items
+--ids ID1,ID2   Only list images with specified full IDs
 --tree          Show image snapshot/clone tree
 ```
 
@@ -136,6 +142,10 @@ Create an image. Options:
 * `--enc-key random` - Generate a new random AES-256-XTS encryption key for the new image.
 * `--enc-key HEX` - Set a specified AES-256-XTS key (64 bytes in hex) for the new image.
 * `--enc-key vault:ID` - Use an encryption key from an external Vault secret with specified ID.
+* `--owner USERNAME` - Set image owner. The default owner is the current user taken from the
+  CN of the TLS certificate used to connect to the cluster.
+* `--owner-group NAME` - Set image owner group. Users in this group get full access to the image.
+* `--reader-group NAME` - Set image reader group. Users in this group get read-only access to the image.
 
 ```
 vitastor-cli create --snapshot <snapshot> [OPTIONS] <image>
@@ -165,6 +175,9 @@ You should resize file system in the image, if present, before shrinking it.
 * `-f|--force` - Proceed with shrinking or setting readwrite flag even if the image has children.
 * `--down-ok` - Proceed with shrinking even if some data will be left on unavailable OSDs.
 * `--enc-key HEX` - Change image encryption key (allowed only with `--force`).
+* `--owner USERNAME` - Change image owner.
+* `--owner-group NAME` - Change image owner group name.
+* `--reader-group NAME` - Change image reader group name.
 
 ## dd
 
@@ -183,6 +196,7 @@ Options can be specified in classic dd style (`key=value`) or like usual (`--key
 | `iimg=<image>`  | Copy from Vitastor image `<image>`                                      |
 | `if=<file>`     | Copy from file `<file>`                                                 |
 | `oimg=<image>`  | Copy to Vitastor image `<image>`                                        |
+| `opool=<pool>`  | Pool to create output image if it doesn't exist                         |
 | `of=<file>`     | Copy to file `<file>`                                                   |
 | `bs=1M`         | Set copy block size                                                     |
 | `count=N`       | Copy only N input blocks. If N ends in B it counts bytes, not blocks    |
@@ -420,6 +434,7 @@ Optional parameters:
 | `--used_for_app s3:<name>`     | Mark pool as used for S3 location with name `<name>`                       |
 | `--pg_stripe_size <number>`    | Increase object grouping stripe                                            |
 | `--max_osd_combinations 10000` | Maximum number of random combinations for LP solver input                  |
+| `--creator_group <group>`      | User group allowed to create images in this pool                           |
 | `--wait`                       | Wait for the new pool to come online                                       |
 | `-f` or `--force`              | Do not check that cluster has enough OSDs to create the pool               |
 
@@ -439,8 +454,9 @@ Modify an existing pool. Modifiable parameters:
 
 ```
 [-s|--pg_size <number>] [--pg_minsize <number>] [-n|--pg_count <count>]
-[--failure_domain <level>] [--root_node <node>] [--osd_tags <tags>] [--no_inode_stats 0|1]
+[--failure_domain <level>] [--root_node <node>] [--osd_tags <tags>] [--used_for_app <type>:<name>]
 [--max_osd_combinations <number>] [--primary_affinity_tags <tags>] [--scrub_interval <time>]
+[--level_placement <rules>] [--raw_placement <rules>] [--creator_group <group>]
 ```
 
 Non-modifiable parameters (changing them WILL lead to data loss):
@@ -468,7 +484,7 @@ Remove a pool. Refuses to remove pools with images without `--force`.
 
 ## ls-pools
 
-`vitastor-cli ls-pools|pool-ls|ls-pool|pools [-l] [--detail] [--sort FIELD] [-r] [-n N] [--stats] [<glob> ...]`
+`vitastor-cli ls-pools|pool-ls|ls-pool|pools [-l] [--detail] [--sort FIELD] [-r] [-n N] [<glob> ...]`
 
 List pools (only matching <glob> patterns if passed).
 
@@ -479,3 +495,77 @@ List pools (only matching <glob> patterns if passed).
 | `--sort FIELD`       | Sort by specified field (see fields in --json output) |
 | `-r` or `--reverse`  | Sort in descending order                              |
 | `-n` or `--count N`  | Only list first N items                               |
+
+## ls-user
+
+`vitastor-cli ls-users|user-ls|ls-user|list-users [<name> ...]`
+
+List users. If names are passed, only list users with those names. User names must
+match CN (Common Name) of TLS client certificates used to connect to the cluster.
+
+See [Users and access rights](security.en.md#users-and-access-rights) for details on
+the Vitastor authorization model.
+
+## modify-user
+
+`vitastor-cli modify-user --groups <group1,group2,...> <username>`
+
+Create or update a user with the given name (matching TLS certificate CN).
+
+Options:
+
+* `--groups GROUPS` - Set user's groups (comma-separated). Groups are used together with
+  `--owner-group` / `--reader-group` fields of images and `--creator_group` of the pool to
+  authorize operations. Pass an empty string to clear the groups.
+
+## rm-user
+
+`vitastor-cli rm-user|remove-user|delete-user <username>`
+
+Remove a user.
+
+## serve
+
+`vitastor-cli serve`
+
+Start an HTTP server that handles vitastor-cli commands over a REST API in JSON format.
+
+Options:
+
+| <!-- -->              | <!-- -->                                                                      |
+|-----------------------|-------------------------------------------------------------------------------|
+| `--bind_address ADDR` | Server IP address(es), separated by space. Default is `127.0.0.1`.            |
+| `--port 8080`         | Server port. Default is `8080`.                                               |
+| `--api_cert FILE`     | Server TLS certificate.                                                       |
+| `--api_pkey FILE`     | Private key for `--api_cert`.                                                 |
+| `--cert FILE`         | Administrator or client certificate used by the server to access the cluster. |
+| `--pkey FILE`         | Private key for `--cert`.                                                     |
+
+When `api_cert`/`api_pkey` are set the server operates in HTTPS mode. If `client_ca`
+is also set (in configuration or on the command line), connecting clients are authenticated by their
+TLS certificates. When [use_perms](../config/security.en.md#use_perms) is enabled, HTTPS with client
+authentication is mandatory and per-user permissions are enforced. For regular clients the server only
+allows operations on images that the user owns or has group access to; all other operations require
+administrator privileges.
+
+The vitastor-cli process itself must be authenticated as an admin user (its own client
+[cert](../config/security.en.md#cert) must be signed with [admin_ca](../config/security.en.md#admin_ca))
+to be able to serve all requests.
+
+`vitastor-cli serve` exposes a full OpenAPI specification at `/openapi` endpoint.
+Start the server and check it out for the information about available API methods.
+
+See also [Security in Vitastor](security.en.md) for the full picture of how authentication
+and authorization work.
+
+## cpubench
+
+`vitastor-cli cpubench [--json]`
+
+Run CPU crypto performance tests: AES-256-GCM, AES-256-XTS and xxhash3. This benchmark
+does not connect to the cluster — it only measures encryption/hashing speed locally.
+
+Specify `--json` to get the output as machine-readable JSON.
+
+See [Encryption performance](security.en.md#encryption-performance) for example results
+on modern and older CPUs.

docs/usage/cli.ru.md

@@ -34,6 +34,11 @@ vitastor-cli - интерфейс командной строки для адм
 - [modify-pool](#modify-pool)
 - [ls-pools](#ls-pools)
 - [rm-pool](#rm-pool)
+- [ls-user](#ls-user)
+- [modify-user](#modify-user)
+- [rm-user](#rm-user)
+- [serve](#serve)
+- [cpubench](#cpubench)
 
 Глобальные опции:
 
@@ -109,6 +114,7 @@ kaveri    2/1     32   0 B      10 G    0 B        100%    0%
 --sort FIELD    Сортировать по заданному полю (name, size, used_size, <read|write|delete>_<iops|bps|lat|queue>)
 -r|--reverse    Сортировать в обратном порядке
 -n|--count N    Показывать только первые N записей
+--ids ID1,ID2   Показывать только образы с заданными полными ID
 --tree          Вывести снапшоты и клоны в виде дерева
 ```
 
@@ -138,6 +144,12 @@ bench-kaveri         kaveri    10 G  10 G    0 B/s  0     0      0 us  0 B/s  0
 * `--enc-key random` - Сгенерировать случайный ключ шифрования AES-256-XTS для нового образа.
 * `--enc-key HEX` - Установить заданный ключ AES-256-XTS (64 байта в hex) для нового образа.
 * `--enc-key vault:ID` - Использовать ключ из внешнего секрета с заданным ID из Vault.
+* `--owner USERNAME` - Задать владельца образа. По умолчанию владельцем становится текущий
+  пользователь, определяемый по CN TLS-сертификата, используемого для подключения к кластеру.
+* `--owner-group NAME` - Задать группу владельцев образа. Пользователи из этой группы получают
+  полный доступ к образу.
+* `--reader-group NAME` - Задать группу читателей образа. Пользователи из этой группы получают
+  доступ к образу только на чтение.
 
 ```
 vitastor-cli create --snapshot <snapshot> [ОПЦИИ] <image>
@@ -170,6 +182,9 @@ vitastor-cli snap-create [ОПЦИИ] <image>@<snapshot>
 * `-f|--force` - Разрешить уменьшение или перевод в чтение-запись образа, у которого есть клоны.
 * `--down-ok` - Разрешить уменьшение, даже если часть данных останется неудалённой на недоступных OSD.
 * `--enc-key HEX` - Изменить ключ шифрования образа (разрешено только с `--force`).
+* `--owner USERNAME` - Изменить владельца образа.
+* `--owner-group NAME` - Изменить имя группы владельцев образа.
+* `--reader-group NAME` - Изменить имя группы читателей образа.
 
 ## dd
 
@@ -188,6 +203,7 @@ vitastor-cli dd [iimg=<image> | if=<file>] [oimg=<image> | of=<file>] [bs=1M] \
 | `iimg=<image>`  | Копировать из образа Vitastor `<image>`                                 |
 | `if=<file>`     | Копировать из файла `<file>`                                            |
 | `oimg=<image>`  | Копировать в образ Vitastor `<image>`                                   |
+| `opool=<pool>`  | Пул для создания выходного образа, если он не существует                |
 | `of=<file>`     | Копировать в файл `<file>`                                              |
 | `bs=1M`         | Задать размер блока копирования                                         |
 | `count=N`       | Копировать не более N блоков. Если N заканчивается на B - то N байт.    |
@@ -435,6 +451,7 @@ OSD  PARENT            UP    SIZE  USED%    TAGS          WEIGHT  BLOCK  BITMAP
 | `--scrub_interval <time>`      | Включить скрабы с заданным интервалом времени (число + единица s/m/h/d/M/y) |
 | `--pg_stripe_size <number>`    | Увеличить блок группировки объектов по PG                                  |
 | `--max_osd_combinations 10000` | Максимальное число случайных комбинаций OSD для ЛП-солвера                 |
+| `--creator_group <group>`      | Группа пользователей, которым разрешено создавать образы в данном пуле     |
 | `--wait`                       | Подождать, пока новый пул будет активирован                                |
 | `-f` или `--force`             | Не проверять, что в кластере достаточно доменов отказа для создания пула   |
 
@@ -454,8 +471,9 @@ OSD  PARENT            UP    SIZE  USED%    TAGS          WEIGHT  BLOCK  BITMAP
 
 ```
 [-s|--pg_size <number>] [--pg_minsize <number>] [-n|--pg_count <count>]
-[--failure_domain <level>] [--root_node <node>] [--osd_tags <tags>]
+[--failure_domain <level>] [--root_node <node>] [--osd_tags <tags>] [--used_for_app <type>:<name>]
 [--max_osd_combinations <number>] [--primary_affinity_tags <tags>] [--scrub_interval <time>]
+[--level_placement <rules>] [--raw_placement <rules>] [--creator_group <group>]
 ```
 
 Неизменяемые параметры (их изменение ПРИВЕДЁТ к потере данных):
@@ -483,7 +501,7 @@ OSD  PARENT            UP    SIZE  USED%    TAGS          WEIGHT  BLOCK  BITMAP
 
 ## ls-pools
 
-`vitastor-cli ls-pools|pool-ls|ls-pool|pools [-l] [--detail] [--sort FIELD] [-r] [-n N] [--stats] [<glob> ...]`
+`vitastor-cli ls-pools|pool-ls|ls-pool|pools [-l] [--detail] [--sort FIELD] [-r] [-n N] [<glob> ...]`
 
 Показать список пулов. Если передан(ы) шаблон(ы) `<glob>`, то только с именами,
 соответствующими одному из шаблонов (стандартные ФС-шаблоны с * и ?).
@@ -495,3 +513,79 @@ OSD  PARENT            UP    SIZE  USED%    TAGS          WEIGHT  BLOCK  BITMAP
 | `--sort FIELD`        | Сортировать по заданному полю (поля см. в выводе с --json) |
 | `-r` или `--reverse`  | Сортировать в обратном порядке                             |
 | `-n` или `--count N`  | Выводить только первые N записей                           |
+
+## ls-user
+
+`vitastor-cli ls-users|user-ls|ls-user|list-users [<name> ...]`
+
+Показать список пользователей. Если переданы имена, показать только пользователей с указанными
+именами. Имена пользователей должны совпадать с CN (Common Name) TLS-сертификатов
+клиентов, используемых для подключения к кластеру.
+
+Подробнее о модели авторизации в Vitastor см. в разделе
+[Пользователи и права доступа](security.ru.md#пользователи-и-права-доступа).
+
+## modify-user
+
+`vitastor-cli modify-user --groups <group1,group2,...> <username>`
+
+Создать или изменить пользователя с указанным именем (совпадающим с CN TLS-сертификата).
+
+Опции:
+
+* `--groups GROUPS` - Задать группы пользователя (через запятую). Группы используются
+  вместе с полями `owner-group` / `reader-group` образов и полем `--creator_group` пулов
+  для авторизации операций. Пустая строка очищает список групп.
+
+## rm-user
+
+`vitastor-cli rm-user|remove-user|delete-user <username>`
+
+Удалить пользователя.
+
+## serve
+
+`vitastor-cli serve`
+
+Запустить HTTP-сервер, обрабатывающий команды vitastor-cli через REST API в формате JSON.
+
+Опции:
+
+| <!-- -->              | <!-- -->                                                                         |
+|-----------------------|----------------------------------------------------------------------------------|
+| `--bind_address ADDR` | IP-адрес(а) сервера через пробел. По умолчанию `127.0.0.1`.                      |
+| `--port 8080`         | Порт сервера. По умолчанию `8080`.                                               |
+| `--api_cert FILE`     | TLS-сертификат сервера.                                                          |
+| `--api_pkey FILE`     | Закрытый ключ для сертификата `--api_cert`.                                      |
+| `--cert FILE`         | Сертификат администратора/клиента, используемый сервером для доступа к кластеру. |
+| `--pkey FILE`         | Закрытый ключ для сертификата `--cert`.                                          |
+
+Если заданы `api_cert`/`api_pkey`, сервер работает в режиме HTTPS. Если дополнительно
+задан `client_ca` (в файле конфигурации или в командной строке), подключающиеся клиенты аутентифицируются
+по своим TLS-сертификатам. Если включена опция [use_perms](../config/security.ru.md#use_perms), HTTPS с
+аутентификацией клиентов обязателен, и права доступа проверяются для каждого пользователя. Обычным клиентам
+сервер разрешает только операции с образами, которыми они владеют или к которым имеют доступ через группы;
+остальные операции разрешены только администраторам.
+
+Сам процесс vitastor-cli при этом должен использовать сертификат администратора ([cert](../config/security.en.md#cert),
+подписанный [admin_ca](../config/security.en.md#admin_ca)), чтобы иметь возможность обслуживать
+все виды запросов.
+
+`vitastor-cli serve` выставляет полную OpenAPI-спецификацию по адресу `/openapi`.
+Запустите сервер и посмотрите её для подробной информации о доступных методах API.
+
+Смотрите также подробную информацию о том, как устроены аутентификация и авторизация:
+[Безопасность в Vitastor](security.ru.md).
+
+## cpubench
+
+`vitastor-cli cpubench [--json]`
+
+Запустить тесты производительности CPU для криптографических операций: AES-256-GCM,
+AES-256-XTS и xxhash3. Эта команда не обращается к кластеру — она только замеряет
+скорость шифрования/хеширования локально.
+
+Укажите опцию `--json`, чтобы получить вывод в машиночитаемом JSON-формате.
+
+Примеры вывода на современных и старых процессорах см. в разделе
+[Производительность шифрования](security.ru.md#производительность-шифрования).

docs/usage/nfs.en.md

@@ -8,15 +8,27 @@
 
 Vitastor has two file system implementations. Both can be used via `vitastor-nfs`.
 
-Commands:
-- [mount](#mount)
-- [start](#start)
-- [upgrade](#upgrade)
-- [defrag](#defrag)
-
 ⚠️ Important: follow the instructions from [Linux NFS write size](#linux-nfs-write-size)
 for optimal Vitastor NFS performance if you use EC and HDD and mount your NFS from Linux.
 
+- [Pseudo-FS](#pseudo-fs)
+- [VitastorFS](#vitastorfs)
+  - [Supported POSIX features](#supported-posix-features)
+  - [Limitations](#limitations)
+- [Linux NFS](#linux-nfs)
+  - [Sync vs async safety](#sync-vs-async-safety)
+  - [Linux NFS readahead](#linux-nfs-readahead)
+  - [Linux NFS write size](#linux-nfs-write-size)
+  - [Horizontal scaling](#horizontal-scaling)
+- [RDMA](#rdma)
+- [Commands](#commands)
+  - [mount](#mount)
+  - [start](#start)
+  - [upgrade](#upgrade)
+  - [defrag](#defrag)
+- [Mounting from /etc/fstab](#mounting-from-etc-fstab)
+- [Common options](#common-options)
+
 ## Pseudo-FS
 
 Simplified pseudo-FS proxy is used for file-based image access emulation. It's not
@@ -42,7 +54,7 @@ vitastor-nfs start --block --etcd_address 192.168.5.10:2379 --portmap 0 --port 2
 To mount the FS exported by this server, run:
 
 ```
-mount server:/ /mnt/ -o port=2050,mountport=2050,nfsvers=3,soft,nolock,tcp
+mount server:/ /mnt/ -o port=2050,mountport=2050,nfsvers=3,soft,sync,nolock,tcp
 ```
 
 ## VitastorFS
@@ -105,7 +117,57 @@ Other notable missing features which should be addressed in the future:
   in the DB. The FS is implemented is such way that this garbage doesn't affect its
   function, but having a tool to clean it up still seems a right thing to do.
 
-## Linux NFS write size
+## Linux NFS
+
+Linux NFS client has some specific features of behaviour important for Vitastor:
+
+### Sync vs async safety
+
+Linux NFS has 2 options which affect the mount mode: **soft/hard** and **sync/async**.
+
+**⚠️ Warning: soft,async mode is dangerous and may lead to data loss!**
+
+How these options work:
+
+- In the **hard** mode all requests to the server are retried infinitely. If the NFS server becomes
+  unavailable, it becomes impossible to unmount the FS until you reboot the client host.
+- In the **soft** each request is only tried 2 times (default **retrans** option value for TCP connections).
+  In this case, unmounting a dead FS is possible.
+- In the **sync** mode all modification requests are sent to the server immediately. This is slower,
+  but allows the client to see all errors if they happen.
+- In the **async** mode, modification requests are accumulated and sent to the server in the background
+  mode in parallel. It is faster, but it can hide write errors from the client. Instead of receiving an
+  error from a write operation, the client will only get an error when he closes the file (unsuccessful
+  close() call). Another problem is that there's no convenient way to set write parallelism for NFS, so
+  the client can overload the server.
+
+That's exactly why **soft,async** is dangerous. When a large file is copied, the server is easily overwhelmed
+with write requests and starts to respond slowly. Write requests time out, soft mode retries them only 1 time
+and discards them, which results in parts of the file being lost.
+
+So to recap: always use either **soft,sync** mode, or **hard,async**. By default, `vitastor-nfs mount` uses
+**soft,sync** if mode options are not specified.
+
+### Linux NFS readahead
+
+By default, Linux uses rather small readahead value of 128 KB for NFS mounts.
+
+For simple reading/copuing of files it's way too low because it stops VitastorFS from
+using parallel reads.
+
+However, you can increase readahead. You have 3 options:
+
+1. Use the built-in `vitastor-nfs mount --readahead <SIZE>` option (for example, `--readahead 2M`).
+2. Edit `[nfsrahead]` section in `/etc/nfs.conf` - add `nfs=2048` in it (global setting for all NFS 3.0 mounts).
+3. Manually with the following command: \
+   `echo 2048 > /sys/class/bdi/$(findmnt -no MAJ:MIN /mnt/nfs 2>/dev/null | tr -d ' ')/read_ahead_kb`
+
+Here, `2048` is the desired readahead in KB, and `/mnt/nfs` is your FS mountpoint.
+
+You can easily see 2x-3x linear read improvement after you increase the parameter, so we
+really urge you to try increasing it!
+
+### Linux NFS write size
 
 Linux NFS client (nfs/nfsv3/nfsv4 kernel modules) has a hard-coded maximum I/O size,
 currently set to 1 MB - see `rsize` and `wsize` in [man 5 nfs](https://linux.die.net/man/5/nfs).
@@ -161,7 +223,7 @@ modprobe nfsv3
 After these (not much complicated 🙂) manipulations NFS begins to be mounted
 with new wsize and rsize by default and it fixes Vitastor-NFS linear write performance.
 
-## Horizontal scaling
+### Horizontal scaling
 
 Linux NFS 3.0 client doesn't support built-in scaling or failover, i.e. you can't
 specify multiple server addresses when mounting the FS.
@@ -200,6 +262,7 @@ Use regular `umount <MOUNTPOINT>` to unmount the FS.
 The server will be automatically stopped when the FS is unmounted.
 
 - `-o|--options <OPT>` - Pass additional NFS mount options (ex.: -o async).
+- `--readahead <SIZE>` - Set Linux FS readahead to `<SIZE>`. Default is 128 KB, larger values increase sequential read speed (for example, try `--readahead 2M`).
 
 ### start
 
@@ -249,6 +312,31 @@ Options:
 | `--include-empty`          | Include old and empty volumes; make sure to restart NFS servers before using it |
 | `--no-rm`                  | Move, but do not delete data                                            |
 
+## Mounting from /etc/fstab
+
+Vitastor packages include mount helpers for `/etc/fstab`: **/usr/sbin/mount.vitastorfs** and **/usr/sbin/mount.vitastorblk**.
+
+Both are simple symbolic links to `vitastor-nfs` and allow to handle `mount` calls correctly.
+
+Example `/etc/fstab` entries:
+
+```
+myfs /S vitastorfs pool=fspool,readahead=2M,--etcd_address=10.0.2.15:2379,soft,sync 0 0
+none /mnt/vitastor-block vitastorblk pool=ecpool 0 0
+```
+
+When you run `mount /S`, the helper is called internally and starts VitastorFS.
+Helper call syntax is:
+
+```
+mount.vitastorfs <FSNAME> <MOUNTPOINT> -o <OPTS>
+```
+
+`<OPTS>` is comma-separated and includes all mount options from fstab. You can include
+both Vitastor and NFS mount options in it. An option is treated as an NFS option if it
+does not start with `--`, `pool=`, `readahead=` or if it doesn't contain `=` or `_`.
+Other options are treated as Vitastor options.
+
 ## Common options
 
 | <!-- -->           | <!-- -->                                                 |
@@ -262,3 +350,4 @@ Options:
 | `--logfile <FILE>` | log to the specified file                                |
 | `--enforce 1`      | enforce permissions at the server side (no by default)   |
 | `--foreground 1`   | stay in foreground, do not daemonize                     |
+| `--trace`          | trace all NFS requests                                   |

docs/usage/nfs.ru.md

@@ -8,15 +8,27 @@
 
 В Vitastor есть две реализации файловой системы. Обе используются через `vitastor-nfs`.
 
-Команды:
-- [mount](#mount)
-- [start](#start)
-- [upgrade](#upgrade)
-- [defrag](#defrag)
-
 ⚠️ Важно: для оптимальной производительности Vitastor NFS в Linux при использовании
 HDD и EC (erasure кодов) выполните инструкции из раздела [Размер записи Linux NFS](#размер-записи-linux-nfs).
 
+- [Псевдо-ФС](#псевдо-фс)
+- [VitastorFS](#vitastorfs)
+  - [Поддерживаемые функции POSIX](#поддерживаемые-функции-posix)
+  - [Ограничения](#ограничения)
+- [NFS в Linux](#nfs-в-linux)
+  - [Безопасность режимов sync и async](#безопасность-режимов-sync-и-async)
+  - [Упреждающее чтение Linux NFS](#упреждающее-чтение-linux-nfs)
+  - [Размер записи Linux NFS](#размер-записи-linux-nfs)
+  - [Горизонтальное масштабирование](#горизонтальное-масштабирование)
+- [RDMA](#rdma)
+- [Команды](#команды)
+  - [mount](#mount)
+  - [start](#start)
+  - [upgrade](#upgrade)
+  - [defrag](#defrag)
+- [Монтирование из /etc/fstab](#монтирование-из-etc-fstab)
+- [Общие опции](#общие-опции)
+
 ## Псевдо-ФС
 
 Упрощённая реализация псевдо-ФС используется для эмуляции файлового доступа к блочным
@@ -42,7 +54,7 @@ vitastor-nfs start --block --etcd_address 192.168.5.10:2379 --portmap 0 --port 2
 Примонтировать ФС, запущенную с такими опциями, можно следующей командой:
 
 ```
-mount server:/ /mnt/ -o port=2050,mountport=2050,nfsvers=3,soft,nolock,tcp
+mount server:/ /mnt/ -o port=2050,mountport=2050,nfsvers=3,soft,sync,nolock,tcp
 ```
 
 ## VitastorFS
@@ -109,7 +121,58 @@ JSON-формате :-). Для инспекции содержимого БД
   записи. ФС устроена так, что на работу они не влияют, но для порядка и их стоит
   уметь подчищать.
 
-## Размер записи Linux NFS
+## NFS в Linux
+
+NFS в Linux имеет некоторые важные для Vitastor особенности поведения:
+
+### Безопасность режимов sync и async
+
+В Linux NFS есть 2 опции, влияющие на режим монтирования: **soft/hard** и **sync/async**.
+
+**⚠️ Внимание: сочетание soft,async опасно и может приводить к потере данных!**
+
+Логика работы опций:
+
+- В режиме **hard** все запросы к серверу повторяются бесконечно. Если NFS-сервер становится недоступен,
+  отмонтировать ФС становится невозможно до перезагрузки клиентской машины.
+- В режиме **soft** каждый запрос повторяется только 2 раза (значение опции **retrans** по умолчанию для
+  TCP соединений). В этом случае отмонтировать умершую ФС можно.
+- В режиме **sync** все запросы изменения отправляются на сервер сразу. Это медленнее, но зато любую
+  ошибку записи клиент видит сразу.
+- В режиме **async** запросы изменения накапливаются и отправляются на сервер в фоновом режиме, параллельно.
+  Это быстрее, но ошибки записи могут быть незаметны для клиента и вместо ошибки записи клиент может
+  получить ошибку в момент закрытия файла (вызова close()). Помимо этого, в NFS нет нормального способа
+  регулировать параллелизм записи, поэтому клиент может легко перегружать сервер большим количеством команд.
+
+Именно поэтому режим **soft,async** опасен. При копировании любого большого файла сервер перегружается и
+начинает медленно отвечать. Команды записи заканчиваются таймаутом, soft режим делает 1 повторную попытку,
+после чего забывает команды совсем. Часть блоков файла оказывается просто потерянной.
+
+Резюме: всегда используйте либо режим **soft,sync**, либо **hard,async**. Если опции `vitastor-nfs mount`
+не указаны, режим по умолчанию - **soft,sync**.
+
+### Упреждающее чтение Linux NFS
+
+По умолчанию Linux использует довольно небольшой размер упреждающего чтения для
+файловых систем NFS - 128 КБ.
+
+Для простого чтения/копирования файлов его не достаточно, потому что оно мешает VitastorFS
+нормально утилизировать параллелизм чтения.
+
+Однако, вы можете увеличить эту настройку целыми 3 способами:
+
+1. Встроенной опцией `vitastor-nfs mount --readahead <SIZE>` (например, `--readahead 2M`).
+2. Добавив в секцию `[nfsrahead]` файла конфигурации `/etc/nfs.conf` строку `nfs=2048` (глобальная
+   настройка для всех NFS 3.0 точек монтирования).
+3. Вручную следующей командой: \
+   `echo 2048 > /sys/class/bdi/$(findmnt -no MAJ:MIN /mnt/nfs 2>/dev/null | tr -d ' ')/read_ahead_kb`
+
+Здесь `2048` - размер readahead, а `/mnt/nfs` - путь к вашей ФС.
+
+После увеличения параметра скорость линейного чтения легко может увеличиться в 2-3 раза, так что
+советуем обязательно попробовать!
+
+### Размер записи Linux NFS
 
 Клиент Linux NFS (модули ядра nfs/nfsv3/nfsv4) имеет фиксированный в коде максимальный
 размер запроса ввода-вывода, равный 1 МБ - см. `rsize` и `wsize` в [man 5 nfs](https://linux.die.net/man/5/nfs).
@@ -169,7 +232,7 @@ modprobe nfsv3
 монтироваться с новыми wsize и rsize, и производительность линейной записи в Vitastor-NFS
 исправляется.
 
-## Горизонтальное масштабирование
+### Горизонтальное масштабирование
 
 Клиент Linux NFS 3.0 не поддерживает встроенное масштабирование или отказоустойчивость.
 То есть, вы не можете задать несколько адресов серверов при монтировании ФС.
@@ -209,6 +272,9 @@ VitastorFS из GPUDirect.
 Сервер автоматически останавливается при отмонтировании ФС.
 
 - `-o|--options <OPT>` - Передать дополнительные опции монтирования NFS (пример: -o async).
+- `--readahead <SIZE>` - Устанавливает размер упреждающей записи ФС Linux в `<SIZE>`.
+  Значение по умолчанию 128 KB, бОльшие значения значительно улучшают скорость линейного чтения.
+  Попробуйте, например, `--readahead 2M`.
 
 ### start
 
@@ -261,6 +327,32 @@ VitastorFS из GPUDirect.
 | `--include-empty`          | Дефрагментировать старые и пустые тома; обязательно перезапустите NFS-сервера после использования этой опции |
 | `--no-rm`                  | Перемещать, но не удалять данные                                        |
 
+## Монтирование из /etc/fstab
+
+Пакеты Vitastor включают хелперы для монтирования из `/etc/fstab`: **/usr/sbin/mount.vitastorfs** и **/usr/sbin/mount.vitastorblk**.
+
+Оба являются простыми символическими ссылками на `vitastor-nfs` и дают возможность
+корректно обрабатывать вызовы монтирования утилитой `mount`.
+
+Примеры записей `/etc/fstab`:
+
+```
+myfs /S vitastorfs pool=fspool,readahead=2M,--etcd_address=10.0.2.15:2379,soft,sync 0 0
+none /mnt/vitastor-block vitastorblk pool=ecpool 0 0
+```
+
+Когда вы запускаете `mount /S`, внутри вызывается хелпер и запускает VitastorFS.
+Синтаксис вызова самого хелпера:
+
+```
+mount.vitastorfs <FSNAME> <MOUNTPOINT> -o <OPTS>
+```
+
+`<OPTS>` - это набор опций, разделённых запятой, и в нём передаются все опции
+монтирования из fstab. В него можно включать и опции Vitastor, и опции NFS. Опция
+считается опцией NFS, если она не начинается с `--`, `pool=` и `readahead=`, а также
+если она не содержит `=` или `_`. Все прочие опции считаются опциями Vitastor.
+
 ## Общие опции
 
 | <!-- -->           | <!-- -->                                                |
@@ -274,3 +366,4 @@ VitastorFS из GPUDirect.
 | `--logfile <FILE>` | записывать логи в заданный файл                         |
 | `--enforce 1`      | проверять права доступа на стороне сервера (по умолчанию нет) |
 | `--foreground 1`   | не уходить в фон после запуска                          |
+| `--trace`          | логгировать все запросы NFS                             |

docs/usage/security.en.md

@@ -0,0 +1,665 @@
+[Documentation](../../README.md#documentation) → Usage → Security in Vitastor
+
+-----
+
+[Читать на русском](security.ru.md)
+
+# Security in Vitastor
+
+- [Overview](#overview)
+- [Quick setup](#quick-setup)
+- Principles of operation
+  - [etcd transport encryption (TLS)](#etcd-transport-encryption-tls)
+  - [OSD transport encryption (AES-GCM)](#osd-transport-encryption-aes-gcm)
+  - [End-to-end image data encryption (AES-XTS)](#end-to-end-image-data-encryption-aes-xts)
+  - [Certificate-based authentication](#certificate-based-authentication)
+  - [Users and access rights](#users-and-access-rights)
+  - [etcd privileges](#etcd-privileges)
+- Manual setup
+  - [Configuring OSD transport encryption](#configuring-osd-transport-encryption)
+  - etcd/Antietcd setup options
+    - [Mon with embedded Antietcd](#mon-with-embedded-antietcd)
+    - [Mon as an Etcd proxy](#mon-as-an-etcd-proxy)
+    - [Mon with a separate Antietcd Proxy](#mon-with-a-separate-antietcd-proxy)
+    - [Standalone Antietcd without etcd](#standalone-antietcd-without-etcd)
+  - [Vault/OpenBao setup](#vaultopenbao-setup)
+    - [Vault setup example](#vault-setup-example)
+- Lists of allowed operations
+  - [etcd data access rights](#etcd-data-access-rights)
+  - [OSD data access rights](#osd-data-access-rights)
+  - [API access rights](#api-access-rights)
+- [Encryption performance](#encryption-performance)
+
+## Overview
+
+Starting from version 3.1.0, Vitastor provides full data protection:
+control plane protection (etcd), data plane protection (OSDs), and end-to-end data encryption.
+
+- Control plane protection:
+  - etcd transport encryption (TLS)
+  - Authentication via client TLS (X.509) certificates
+  - Access control of clients to etcd data
+- Data plane protection:
+  - Full AES-GCM encryption of OSD transport (similar to TLS, but faster)
+  - Alternatively, AES-GCM encryption of just operation headers with data checksums using a secret "salt"
+  - Authentication via client TLS (X.509) certificates
+  - Access control of clients on the OSD side
+- End-to-end encryption:
+  - Data is encrypted using AES-XTS on the client side, the Vitastor cluster has no access to plaintext data
+  - AES-XTS keys can be stored in etcd or in an external Vault/OpenBao
+
+All features are optional and disabled in the simplest configuration. By default, only
+transport-level data checksums ([proto_checksums](../config/security.en.md#proto_checksums)=payload)
+are enabled for clients that support them (>= 3.1.0). For older clients, connections
+without data checksums are allowed by default ([force_proto_checksums](../config/security.en.md#force_proto_checksums) is empty).
+
+For a quick setup, jump to the [Quick setup](#quick-setup) section.
+
+Descriptions of all security-related parameters can be found [here](../config/security.en.md).
+
+## Quick setup
+
+For a quick setup, use the `/usr/lib/vitastor/mon/make-etcd` script:
+
+1. Log in to the node where the first monitor and etcd will be located.
+2. Create `/etc/vitastor/vitastor.conf` with minimal parameters: etcd_address,
+   osd_network and, if you want to enable privileges, use_perms (note `https://`
+   in etcd addresses):
+   ```
+   {
+       "etcd_address": ["https://10.0.0.10:2379","https://10.0.0.11:2379","https://10.0.0.12:2379"],
+       "osd_network": "10.0.0.0/24",
+       "use_perms": true
+   }
+   ```
+3. Run `/usr/lib/vitastor/mon/make-etcd` without parameters or with the `--antietcd-only`
+   parameter if you want to initialize the cluster with Antietcd only, without etcd.
+4. The script will generate all necessary certificates and offer to copy them to the other
+   monitor nodes. Root ssh access to these nodes is required to do it, so agree if it's
+   available.
+5. If you don't have root ssh access from the first node to other nodes, copy configuration
+   manually (vitastor.conf and all certificates/keys, except CA `*_ca.key`) and call
+   `/usr/lib/vitastor/mon/make-etcd` on every node.
+
+After that, you can proceed with OSD initialization.
+
+If you want to understand the setup in more detail, read the [Principles of operation](#principles-of-operation)
+and [Manual setup](#manual-setup) sections below.
+
+## Principles of operation
+
+### etcd transport encryption (TLS)
+
+Possible setups:
+- Without encryption (http)
+- With encryption (https)
+- With encryption and client certificate authentication. Either the same certificate
+  used for authentication on the OSD side (`cert`+`pkey` / `osd_cert`+`osd_pkey`)
+  is used, or a separately specified certificate (`etcd_client_cert`+`etcd_client_key`).
+
+### OSD transport encryption (AES-GCM)
+
+Possible setups:
+- Unencrypted transport without checksums: `proto_checksums=none`.
+- Unencrypted transport with data checksums: `proto_checksums=payload` (may be omitted,
+  this is the default value). It's allowed to disable checksums on the client side, or
+  use an older client that does not support checksums. If you want to block connections
+  from clients without checksums, use the option `force_proto_checksums=payload`.
+- Header-only encryption with data checksums: activated when the options
+  `cert`, `pkey`, `osd_ca` are set on the client side and `osd_cert`, `osd_pkey`, `osd_ca`, `client_ca`
+  on the OSD side, with `proto_checksums=payload`. In this mode, disabling checksums on the client
+  side is forbidden by default, i.e. `force_proto_checksums=payload` is used.
+- Full transport encryption of all traffic: same as the previous option, but with `proto_checksums=gcm`.
+  In this case, clients are by default allowed to downgrade to checksums only, but this
+  can also be forbidden via `force_proto_checksums=gcm`. This is the slowest setup and
+  it's only recommended for insecure (public) networks. In particular, full traffic
+  encryption together with end-to-end AES-XTS image encryption encrypts data twice.
+
+Encryption uses the AES-256-GCM algorithm and a custom simplified key exchange protocol,
+fully analogous to TLS 1.3 ECDHE.
+
+### End-to-end image data encryption (AES-XTS)
+
+The Vitastor client supports encrypting each image's data with its own key. In this case,
+data is encrypted by the client before sending it to OSDs and OSDs can't see it in plain.
+The encryption key can be changed when cloning/creating image snapshots. For example,
+you can make a base VM image (say, Debian Linux) unencrypted, but have encrypted client VM
+images inheriting from it.
+
+Image encryption keys can be stored in etcd or in an external Vault. In the latter case,
+etcd only stores key IDs and Vitastor cluster can't decrypt the data at all. To use
+Vault, create an image with the `--enc_key vault:ID` option, specify vault_url and vault_ca
+options in the configuration, create accounts for all clients in Vault, and grant them access
+to the required v1 secrets.
+
+Once again, if AES-XTS is used together with full traffic encryption (`proto_checksums=gcm`),
+image data is encrypted twice — first with AES-XTS, and then with AES-GCM. Use it only if
+you are completely paranoid :-).
+
+### Certificate-based authentication
+
+When encryption is enabled, Vitastor clients, OSDs, and monitors authenticate via certificates
+for both etcd (Antietcd) and OSD connections.
+
+Separate certificates must be used for OSDs and monitors — either self-signed, or signed
+by separate CAs (`osd_ca` and `mon_ca`). All OSDs can use the same certificate, and all
+monitors can also use the same certificate, since the privileges of different OSDs or
+different monitors do not differ (theoretically, one could differentiate OSD certificates
+by pool, but there has been no need for this so far).
+
+Also, a monitor certificate may not be needed at all if Antietcd is embedded into the monitor
+itself. In this case, the monitor already has access to all etcd data directly in memory.
+
+### Users and access rights
+
+When transport encryption is disabled, Vitastor operates without access control, i.e.,
+any cluster client has full access to both the management layer and the data layer. This
+option is suitable for dedicated trusted storage networks.
+
+When OSD transport encryption is enabled (at least for headers), you can enable access
+control by turning on the `use_perms=true` option. When this option is enabled, each user
+(and even an OSD or a monitor) can perform only operations allowed for him.
+
+Each user, administrator, OSD or monitor must have their own certificate signed by a specific
+root certificate:
+- `client_ca` for regular users. Common Name of the certificate must be equal to the user's
+  name. Regular users can only read and modify explicitly permitted images and can't modify
+  cluster state.
+- `admin_ca` for administrators. Administrators can read and modify all images, and also
+  adminster the cluster: view overall statistics and status, create and delete OSDs, etc.
+  Common Name is not checked for admin users.
+- `osd_ca` for OSDs and `mon_ca` for monitors (if Antietcd runs separately). OSDs and monitors
+  also have distinct permission sets.
+
+User privileges for regular users are stored in etcd data and currently consist of only
+one property in `/vitastor/config/user/<name>`:
+- `groups` - List of group names the user is a member of.
+
+Images have the following properties:
+- Owner (`owner`) — the user name that is allowed to both read and modify the image
+- Owner group (`owner_group`) — the owner group name
+- Reader group (`reader_group`) — the name of the group of users allowed to read the image
+
+And there is also a property on the pool:
+- Creator group (`creator_group`) — the name of the group of users allowed to create images in the pool
+
+For the list of allowed operations on image data on the OSD side, see the
+[OSD data access rights](#osd-data-access-rights) section.
+
+### etcd privileges
+
+etcd privileges are implemented through Antietcd in all modes of operation.
+
+Built-in etcd privileges are not supported due to numerous inconveniences:
+- Certificate-based authentication does not work at all in etcd's REST interface,
+- Privileges are stored separately from k/v data and cannot participate in transactions,
+- Only the administrator (root) can change privileges,
+- There is no support for filtering range read responses by privileges.
+
+If etcd is used, Antietcd acts as a filtering proxy and can be embedded in the Vitastor
+monitor or run separately. In this case, etcd must allow incoming connections only from
+Antietcd, and all other components must connect to Antietcd.
+
+If Antietcd runs as a part of the Vitastor monitor, it is sufficient to enable the option
+`use_perms=true` and set the required certificates. If Antietcd is run separately, privileges
+have to be enabled separately using Antietcd options. For more details on the setup, see
+the [etcd/Antietcd setup options](#etcdantietcd-setup-options) section.
+
+For the list of allowed operations with etcd data, see the
+[etcd data access rights](#etcd-data-access-rights) section.
+
+## Manual setup
+
+### Configuring OSD transport encryption
+
+You need 3 certificates: one for OSDs, one for signing client certificates and one for
+signing administrator certificates. For OSDs, you can use a self-signed certificate (osd_ca.crt)
+or a separate certificate (osd.crt) signed by a trusted osd_ca.crt certificate. For clients,
+you must use separate certificates signed by a common CA certificate (client_ca.crt). One more
+CA certificate (admin_ca.crt) is required for signing administrator certificates.
+
+Add to the Vitastor configuration on OSD servers:
+- use_perms: true
+- osd_ca: osd_ca.crt
+- client_ca: client_ca.crt
+- admin_ca: admin_ca.crt
+- osd_cert: osd_ca.crt
+- osd_pkey: osd_ca.key
+
+On the client side:
+- use_perms: true
+- cert: client.crt
+- pkey: client.key
+
+### etcd/Antietcd setup options
+
+The following configuration options are available:
+
+#### Mon with embedded Antietcd
+
+The simplest option. Apart from OSD certificates, you only need 1 certificate for Antietcd (antietcd.crt).
+
+Vitastor settings (`/etc/vitastor/vitastor.conf`):
+- etcd_address: [ "http://mon1:2379", ... ] (addresses of your monitors with port 2379)
+- use_perms: true
+- use_antietcd: true
+- antietcd_cert: antietcd.crt
+- antietcd_key: antietcd.key
+- etcd_ca: antietcd.crt
+- osd_ca: osd_ca.crt
+- client_ca: client_ca.crt
+- admin_ca: admin_ca.crt
+
+#### Mon as an Etcd proxy
+
+If you want to enable privileges, but stay on etcd, you can use etcd proxy mode.
+
+You will need 2 separate certificates: one for etcd (etcd.crt) and one for antietcd (antietcd.crt).
+The etcd client port must be different from the standard 2379 — for example, you can pick 2381.
+
+Vitastor settings:
+- etcd_address: [ "http://mon1:2379", ... ] (addresses of your monitors with port 2379)
+- use_perms: true
+- use_antietcd: true
+- etcd_proxy:
+  ```
+  {
+    "urls": [ "http://mon1:2381", ... ], // addresses of your etcd with port 2381
+    "cert": "antietcd.crt",
+    "key": "antietcd.key",
+    "ca": "etcd.crt"
+  }
+  ```
+- antietcd_cert: antietcd.crt
+- antietcd_key: antietcd.key
+- etcd_ca: antietcd.crt
+- osd_ca: osd_ca.crt
+- client_ca: client_ca.crt
+- admin_ca: admin_ca.crt
+
+etcd command-line options:
+```
+--advertise-client-urls=https://<ADDRESS>:2381 --listen-client-urls=https://<ADDRESS>:2381 \
+--client-cert-auth --cert-file=etcd.crt --key-file=etcd.key --trusted-ca-file=antietcd.crt \
+--peer-client-cert-auth --peer-cert-file=etcd.crt --peer-key-file=etcd.key --peer-trusted-ca-file=etcd.crt
+```
+
+#### Mon with a separate Antietcd Proxy
+
+If in addition to the previous option you want to offload Vitastor monitor's tasks from Antietcd,
+you can run it separately.
+
+Similar to the previous option, 2 certificates are needed: one for etcd and one for antietcd,
+plus a separate certificate for the monitor.
+
+Vitastor settings:
+- etcd_address: [ "http://mon1:2379", ... ] (addresses of your monitors with port 2379)
+- use_perms: true
+- use_antietcd: false
+- etcd_ca: antietcd.crt
+- osd_ca: osd_ca.crt
+- client_ca: client_ca.crt
+- admin_ca: admin_ca.crt
+- mon_etcd_client_cert: mon_ca.crt
+- mon_etcd_client_key: mon_ca.key
+
+Antietcd command-line options:
+```
+--port 2379 --cert /etc/vitastor/antietcd.crt --key /etc/vitastor/antietcd.key \
+--client_cert_auth 1 --auth_filter /usr/lib/vitastor/mon/vitastor_auth_filter.js \
+--ca /etc/vitastor/client_ca.crt --admin_ca /etc/vitastor/admin_ca.crt \
+--osd_ca /etc/vitastor/osd_ca.crt --mon_ca /etc/vitastor/mon_ca.crt \
+--etcd_proxy url1,url2,... --etcd_ca /etc/vitastor/etcd.crt \
+--etcd_cert /etc/vitastor/antietcd.crt --etcd_key /etc/vitastor/antietcd.key
+```
+
+etcd command-line options (same as in the previous option):
+```
+--advertise-client-urls=https://<ADDRESS>:2381 --listen-client-urls=https://<ADDRESS>:2381 \
+--client-cert-auth --cert-file=etcd.crt --key-file=etcd.key --trusted-ca-file=antietcd.crt \
+--peer-client-cert-auth --peer-cert-file=etcd.crt --peer-key-file=etcd.key --peer-trusted-ca-file=etcd.crt
+```
+
+#### Standalone Antietcd without etcd
+
+Same as the previous option, but etcd and its certificate are not needed:
+
+Vitastor settings (same as in the previous option):
+- etcd_address: [ "http://mon1:2379", ... ] (addresses of your monitors with port 2379)
+- use_perms: true
+- use_antietcd: false
+- etcd_ca: antietcd.crt
+- osd_ca: osd_ca.crt
+- client_ca: client_ca.crt
+- admin_ca: admin_ca.crt
+- mon_etcd_client_cert: mon_ca.crt
+- mon_etcd_client_key: mon_ca.key
+
+Antietcd command-line options:
+```
+--port 2379 --cert /etc/vitastor/antietcd.crt --key /etc/vitastor/antietcd.key \
+--client_cert_auth 1 --auth_filter /usr/lib/vitastor/mon/vitastor_auth_filter.js \
+--ca /etc/vitastor/client_ca.crt --admin_ca /etc/vitastor/admin_ca.crt \
+--osd_ca /etc/vitastor/osd_ca.crt --mon_ca /etc/vitastor/mon_ca.crt \
+--persist_filter /usr/lib/vitastor/mon/vitastor_persist_filter.js
+```
+
+### Vault/OpenBao setup
+
+To use Vault, each client that needs to get image keys from Vault needs a Vault account.
+Vitastor only supports client certificate-based authentication, so all client certificates
+(`cert`+`pkey`) must be registered in Vault, and they must be granted access to the
+corresponding secrets (v1 secrets API is supported).
+
+The required format of a Vault secret is a single `key` field as a hexadecimal string.
+The AES-256-XTS algorithm is used, so the key length is 64 bytes, i.e., the string must
+consist of 128 hexadecimal digits.
+
+To connect to Vault, set the following settings in Vitastor.conf:
+- `vault_url` — Vault address (e.g., `https://vault:8200`)
+- `vault_ca` — Vault's own certificate
+
+After that, if you create an image (`vitastor-cli create`) with the option `--enc_key vault:<ID>`,
+Vitastor clients will first contact Vault to obtain a token at `/v1/auth/cert/login`,
+and then request the actual secret from Vault at `/v1/secret/<ID>`.
+
+#### Vault setup example
+
+Step-by-step instructions for setting up a test Vault using OpenBao as an example:
+
+1. If TLS is not yet configured, generate a self-signed TLS certificate for Vault:
+   ```
+   openssl req -days 3650 -x509 -addext basicConstraints=critical,CA:TRUE,pathlen:1 --addext subjectAltName=DNS:vault \
+       -new -newkey rsa:4096 -nodes -keyout /etc/openbao/vault.key -out /etc/openbao/vault.crt
+   ```
+   Configure it in `/etc/openbao/openbao.hcl`:
+   ```
+   listener "tcp" {
+       address       = "0.0.0.0:8200"
+       tls_cert_file = "/etc/openbao/vault.crt"
+       tls_key_file  = "/etc/openbao/vault.key"
+   }
+   ```
+   And restart OpenBao (`systemctl restart openbao`).
+2. Copy Vault's TLS certificate for Vitastor:
+   ```
+   cp /etc/openbao/vault.crt /etc/vitastor/vault.crt
+   ```
+   Transfer it to all client nodes and specify it in `/etc/vitastor/vitastor.conf`:
+   ```
+   {
+       ...
+       "vault_url": "http://vault:8200",
+       "vault_ca": "/etc/vitastor/vault.crt"
+   }
+   ```
+3. Check Vault status:
+   ```
+   bao status -ca-cert /etc/openbao/vault.crt -address=https://vault:8200
+   ```
+4. Initialize Vault in test mode from 1 node (with 1 key share):
+   ```
+   bao operator init -n 1 -t 1 -ca-cert /etc/openbao/vault.crt -address=https://vault:8200
+   ```
+5. Unseal Vault:
+   ```
+   bao operator unseal -ca-cert /etc/openbao/vault.crt -address=https://vault:8200
+   ```
+6. Enable certificate-based authentication:
+   ```
+   bao auth enable -ca-cert /etc/openbao/vault.crt -address=https://vault:8200 cert
+   ```
+7. Enable v1 secrets:
+   ```
+   bao secrets enable -ca-cert /etc/openbao/vault.crt -address=https://vault:8200 -path=secret kv-v1
+   ```
+8. Create a test secret:
+   ```
+   bao kv put -ca-cert /etc/openbao/vault.crt -address=https://vault:8200 secret/vitastor/testimg3 key=$(openssl rand -hex 64)
+   ```
+9. Generate a signed certificate for a Vitastor user (on a machine where you have `client_ca.crt` and `client_ca.key`):
+   ```
+   openssl req -subj '/CN=testimg3' -nodes -new -keyout testimg3.key -out testimg3.csr
+   openssl x509 -req -days 3650 -CA client_ca.crt -CAkey client_ca.key -CAcreateserial -in testimg3.csr -out testimg3.crt
+   rm testimg3.csr
+   ```
+10. Create a user in Vault and grant it access to the secret:
+    ```
+    cat >testimg3.policy <<EOF
+    path "/secret/vitastor/testimg3" {
+        capabilities = ["read"]
+    }
+    EOF
+
+    bao policy write -ca-cert /etc/openbao/vault.crt -address=https://vault:8200 testimg3 testimg3.policy
+
+    bao write -ca-cert /etc/openbao/vault.crt -address=https://vault:8200 auth/cert/certs/testimg3 \
+        certificate=@testimg3.crt display_name=testimg3 token_ttl=24h token_policies=testimg3
+    ```
+11. Test access to the secret:
+    ```
+    curl --cacert /etc/vitastor/vault.crt --cert testimg3.crt --key testimg3.key \
+        --json '{}' https://vault:8200/v1/auth/cert/login
+    ```
+    A token will be printed, substitute it into the following request:
+    ```
+    curl --cacert /etc/vitastor/vault.crt --cert testimg3.crt --key testimg3.key \
+        -H 'X-Vault-Token: <RECEIVED TOKEN>' https://vault:8200/v1/secret/vitastor/testimg3
+    ```
+12. Create an image in Vitastor with the given secret (as an administrator or someone who
+    has the right to create images in your pool):
+    ```
+    vitastor-cli create -s 100G --enc_key vault:vitastor/testimg3 --owner testimg3 testimg3
+    ```
+13. Test access to the image as user testimg3:
+    ```
+    vitastor-cli --cert testimg3.crt --pkey testimg3.key dd if=/dev/urandom oimg=testimg3 bs=1M count=100
+    ```
+
+## Lists of allowed operations
+
+### etcd data access rights
+
+Below, all key names are given without the common prefix `/vitastor`.
+
+Allowed operations with keys in Antietcd for regular users:
+- Read-only:
+  - Always allowed:
+    - `/config/global`
+    - `/config/node_placement`
+    - `/config/pools`
+    - `/pg/config`
+    - `/osd/state/*`
+    - `/pg/state/*`
+    - `/index/maxid/*`
+  - For images [readable by the user](#users-and-access-rights):
+    - `/config/inode/*`
+    - `/index/image/*`
+    - `/inode/stats/*`
+- Read and write:
+  - For pools in which the user can create images:
+    - `/index/maxid/*`
+  - For images owned by the user:
+    - `/config/inode/*`
+    - `/index/image/*`
+
+Allowed operations with keys in Antietcd for administrators:
+- Read:
+  - `/stats`
+  - `/mon/*`
+  - `/pg/*`
+  - `/pgstats/*`
+  - `/inode/stats/*`
+  - `/pool/stats/*`
+- Read and write:
+  - `/config/*`
+  - `/osd/*`
+  - `/index/*`
+  - `/pg/config`
+  - `/pg/history/*`
+  - `/stats`
+  - `/history/last_clean_pgs`
+
+Allowed operations with keys in etcd for OSDs:
+- Read:
+  - `/pg/config`
+  - `/config/*`
+- Read and write:
+  - `/osd/*`
+  - `/pg/state/*`
+  - `/pg/history/*`
+  - `/pgstats/*`
+
+Allowed operations with keys in etcd for monitors:
+- Read:
+  - `/config/*`
+  - `/osd/*`
+  - `/pgstats/*`
+- Read and write:
+  - `/pg/config`
+  - `/stats`
+  - `/history/last_clean_pgs`
+  - `/mon/*`
+  - `/pg/history/*`
+  - `/pg/stats/*`
+  - `/pgstats/*`
+  - `/inode/stats/*`
+  - `/pool/stats/*`
+
+### OSD data access rights
+
+When the `use_perms` option and encryption are enabled, OSDs authenticate clients via
+certificates and allow each client only what is allowed by the access control model.
+
+Client operations:
+- READ — allowed for images the user has read access to.
+- WRITE, DELETE, SCRUB — allowed for images the user has write access to.
+- SYNC — the operation is not tied to an image and is always allowed.
+- DESCRIBE — the operation is allowed only for administrators (used by the commands
+  `vitastor-cli describe` and `fix`).
+- PING — the operation is always allowed.
+- SHOW_CONFIG — the operation is always allowed, however, if the client presents
+  itself as an OSD in it, then it is verified that it uses a certificate signed by `osd_ca`.
+- SEC_LIST (listing) — allowed for other OSDs and administrators with any parameters,
+  and for regular clients only allowed for requests limited to an image the user has
+  read access to.
+
+Cluster operations — allowed only for other OSDs:
+- SEC_READ
+- SEC_WRITE
+- SEC_WRITE_STABLE
+- SEC_SYNC
+- SEC_STABILIZE
+- SEC_ROLLBACK
+- SEC_DELETE
+- SEC_READ_BMP
+- SEC_LOCK
+
+### API access rights
+
+[vitastor-cli serve](../usage/cli.en.md#serve) also supports client authentication
+via certificates. Only certificates signed by `client_ca` are accepted. A separate
+certificate `api_cert` with the key `api_pkey` is used as the server certificate.
+
+For `vitastor-cli serve` to work correctly, it must use a certificate of an administrator
+(`cert`+`pkey` signed by `admin_ca`) to access Vitastor and serve all requests correctly.
+
+Regular users (with `client_ca`-signed certificates), when accessing the API, are only
+allowed operations on images available to them either for reading (for read-only operations)
+or for writing (for modification):
+
+- image/list — for images the user can read.
+- image/create — for pools in which the user is allowed to create images, or for
+  creating snapshots of images owned by the user.
+- image/delete, image/flatten, image/modify — for images owned by the user.
+
+All other operations are allowed only for administrators.
+
+## Encryption performance
+
+You may wonder — how fast is all this wonderful encryption?
+
+The answer is — it depends heavily on the CPU. On modern processors (with AVX512 with VAES
+support) it is very fast — AES encryption speed can reach 10-20 GB/s and above. This
+primarily concerns the CPU of client machines, because end-to-end encryption is performed
+entirely on the client, and even though transport encryption runs both on clients and OSDs,
+each client has only one thread, while there are many OSDs on the server side.
+
+On older processors, the speed is noticeably worse — for example, on a Xeon E5 v4 it is
+only 3 GB/s.
+
+You can evaluate the performance of your processors using the `vitastor-cli cpubench` command.
+
+Example output (💪 AMD EPYC 9575F):
+
+```
+$ vitastor-cli cpubench
+Vitastor transport encryption benchmark (AES-256-GCM, AES-256-XTS and xxhash3)
+
+Warmup...
+
+No transport encryption, data checksums enabled, e2e unencrypted image
+xxhash3 1 M block... 209000 iterations in 2001 ms = 104447.78 MB/s
+xxhash3 4 K block... 37000000 iterations in 2022 ms = 71479.35 MB/s
+
+Header encryption with payload checksums, e2e unencrypted image
+AES-256-GCM encrypt header + xxhash3 1 M block... 210000 iterations in 2015 ms = 104218.36 MB/s
+AES-256-GCM encrypt header + xxhash3 4 K block... 26000000 iterations in 2073 ms = 48993.01 MB/s
+
+Full transport encryption, e2e unencrypted image
+AES-256-GCM encrypt header and 1 M block... 54000 iterations in 2000 ms = 27000.00 MB/s
+AES-256-GCM encrypt header and 4 K block... 11700000 iterations in 2014 ms = 22692.71 MB/s
+
+No transport encryption, no checksums, e2e encrypted image
+AES-256-XTS encrypt 1 M block... 50000 iterations in 2039 ms = 24521.82 MB/s
+AES-256-XTS encrypt 4 K block... 12600000 iterations in 2009 ms = 24499.13 MB/s
+
+No transport encryption, e2e encrypted image, data checksums enabled
+AES-256-XTS encrypt + xxhash3 1 M block... 40000 iterations in 2013 ms = 19870.84 MB/s
+AES-256-XTS encrypt + xxhash3 4 K block... 10200000 iterations in 2011 ms = 19812.90 MB/s
+
+Header encryption with payload checksums, e2e encrypted image
+AES-256-GCM encrypt header + AES-256-XTS encrypt + xxhash3 1 M block... 40000 iterations in 2014 ms = 19860.97 MB/s
+AES-256-GCM encrypt header + AES-256-XTS encrypt + xxhash3 4 K block... 8700000 iterations in 2011 ms = 16899.24 MB/s
+
+Full transport encryption, e2e encrypted image
+AES-256-XTS + AES-256-GCM encrypt 1 M block... 26000 iterations in 2062 ms = 12609.12 MB/s
+AES-256-XTS + AES-256-GCM encrypt 4 K block... 6300000 iterations in 2006 ms = 12267.88 MB/s
+```
+
+And here is Xeon E5-2680v4:
+
+```
+$ vitastor-cli cpubench
+Vitastor transport encryption benchmark (AES-256-GCM, AES-256-XTS and xxhash3)
+
+Warmup...
+
+No transport encryption, data checksums enabled, e2e unencrypted image
+xxhash3 1 M block... 62000 iterations in 2021 ms = 30677.88 MB/s
+xxhash3 4 K block... 12400000 iterations in 2006 ms = 24146.31 MB/s
+
+Header encryption with payload checksums, e2e unencrypted image
+AES-256-GCM encrypt header + xxhash3 1 M block... 62000 iterations in 2027 ms = 30587.07 MB/s
+AES-256-GCM encrypt header + xxhash3 4 K block... 6800000 iterations in 2011 ms = 13208.60 MB/s
+
+Full transport encryption, e2e unencrypted image
+AES-256-GCM encrypt header and 1 M block... 7000 iterations in 2317 ms = 3021.15 MB/s
+AES-256-GCM encrypt header and 4 K block... 1500000 iterations in 2102 ms = 2787.52 MB/s
+
+No transport encryption, no checksums, e2e encrypted image
+AES-256-XTS encrypt 1 M block... 7000 iterations in 2317 ms = 3021.15 MB/s
+AES-256-XTS encrypt 4 K block... 1600000 iterations in 2088 ms = 2993.30 MB/s
+
+No transport encryption, e2e encrypted image, data checksums enabled
+AES-256-XTS encrypt + xxhash3 1 M block... 6000 iterations in 2188 ms = 2742.23 MB/s
+AES-256-XTS encrypt + xxhash3 4 K block... 1400000 iterations in 2053 ms = 2663.78 MB/s
+
+Header encryption with payload checksums, e2e encrypted image
+AES-256-GCM encrypt header + AES-256-XTS encrypt + xxhash3 1 M block... 6000 iterations in 2190 ms = 2739.73 MB/s
+AES-256-GCM encrypt header + AES-256-XTS encrypt + xxhash3 4 K block... 1300000 iterations in 2101 ms = 2417.00 MB/s
+
+Full transport encryption, e2e encrypted image
+AES-256-XTS + AES-256-GCM encrypt 1 M block... 4000 iterations in 2666 ms = 1500.38 MB/s
+AES-256-XTS + AES-256-GCM encrypt 4 K block... 800000 iterations in 2113 ms = 1478.94 MB/s
+```

docs/usage/security.ru.md

@@ -0,0 +1,670 @@
+[Документация](../../README-ru.md#документация) → Использование → Безопасность в Vitastor
+
+-----
+
+[Read in English](security.en.md)
+
+# Безопасность в Vitastor
+
+- [Обзор](#обзор)
+- [Быстрая настройка](#быстрая-настройка)
+- Принципы работы
+  - [Шифрование соединений с etcd (TLS)](#шифрование-соединений-с-etcd-tls)
+  - [Шифрование соединений с OSD (AES-GCM)](#шифрование-соединений-с-osd-aes-gcm)
+  - [Сквозное шифрование данных образов (AES-XTS)](#сквозное-шифрование-данных-образов-aes-xts)
+  - [Аутентификация по сертификатам](#аутентификация-по-сертификатам)
+  - [Пользователи и права доступа](#пользователи-и-права-доступа)
+  - [Привилегии etcd](#привилегии-etcd)
+- Ручная настройка
+  - [Настройка шифрования соединений OSD](#настройка-шифрования-соединений-osd)
+  - Варианты настройки etcd/Antietcd
+    - [Mon со встроенным Antietcd](#mon-со-встроенным-antietcd)
+    - [Mon в роли Etcd proxy](#mon-в-роли-etcd-proxy)
+    - [Mon с отдельным Antietcd Proxy](#mon-с-отдельным-antietcd-proxy)
+    - [Отдельный Antietcd без etcd](#отдельный-antietcd-без-etcd)
+  - [Настройка Vault/OpenBao](#настройка-vaultopenbao)
+    - [Пример настройки Vault](#пример-настройки-vault)
+- Списки разрешённых операций
+  - [Права доступа к данным etcd](#права-доступа-к-данным-etcd)
+  - [Права доступа к данным OSD](#права-доступа-к-данным-osd)
+  - [Права доступа к API](#права-доступа-к-api)
+- [Производительность шифрования](#производительность-шифрования)
+
+## Обзор
+
+Начиная с версии 3.1.0, Vitastor предоставляет полную защиту данных: защиту слоя
+управления (etcd), защиту слоя данных (OSD) и сквозное шифрование данных.
+
+- Защита слоя управления:
+  - Шифрование соединений с etcd (TLS)
+  - Аутентификация по клиентским TLS (X.509) сертификатам
+  - Контроль доступа клиентов к данным etcd
+- Защита слоя данных:
+  - Либо полное AES-GCM шифрование соединений с OSD (аналогично TLS, но быстрее)
+  - Либо шифрование AES-GCM только заголовков команд с контрольными суммами данных с секретной "солью"
+  - Аутентификация по клиентским TLS (X.509) сертификатам
+  - Контроль доступа клиентов на стороне OSD
+- Сквозное шифрование:
+  - Данные шифруются AES-XTS на стороне клиента, кластер Vitastor не имеет доступа к открытым данным
+  - Ключи AES-XTS могут храниться в etcd или во внешнем Vault/OpenBao
+
+Все функции опциональны и в простейшем варианте настройки выключены. По умолчанию включены
+только контрольные суммы данных на транспортном уровне ([proto_checksums](../config/security.ru.md#proto_checksums)=payload) для
+поддерживающих их клиентов (>= 3.1.0). Для более старых клиентов по умолчанию разрешены
+соединения без контрольных сумм данных ([force_proto_checksums](../config/security.ru.md#force_proto_checksums) пусто).
+
+Для быстрой настройки перейдите к разделу [Быстрая настройка](#быстрая-настройка).
+
+Описания всех параметров, связанных с безопасностью, читайте [здесь](../config/security.ru.md).
+
+## Быстрая настройка
+
+Для быстрой настройки используйте скрипт `/usr/lib/vitastor/mon/make-etcd`:
+
+1. Зайдите на узел, на котором будет располагаться первый монитор и etcd.
+2. Создайте там минимальный `/etc/vitastor/vitastor.conf` с параметрами etcd_address,
+   osd_network и, если хотите включить привилегии - use_perms (обратите внимание на `https://`
+   в адресах etcd):
+   ```
+   {
+       "etcd_address": ["https://10.0.0.10:2379","https://10.0.0.11:2379","https://10.0.0.12:2379"],
+       "osd_network": "10.0.0.0/24",
+       "use_perms": true
+   }
+   ```
+3. Запустите `/usr/lib/vitastor/mon/make-etcd` без параметров или с параметром `--antietcd-only`,
+   если хотите инициализировать кластер только с Antietcd без etcd.
+4. Скрипт сгенерирует все необходимые сертификаты и предложит скопировать их на остальные узлы
+   мониторов. Для этого нужен root ssh доступ к этим узлам. Если он есть - соглашайтесь, скрипт
+   автоматически скопирует конфигурацию и инициализирует все etcd и мониторы.
+5. Если root ssh доступа с первого узла на остальные узлы мониторов нет - скопируйте на них конфигурацию
+   вручную (vitastor.conf и все сертификаты и ключи, кроме ключей CA `*_ca.key`) и повторите на каждом
+   узле вызов `/usr/lib/vitastor/mon/make-etcd`.
+
+После этого можете переходить к инициализации OSD.
+
+Если хотите разобраться в настройке подробнее, читайте далее разделы [Принципы работы](#принципы-работы)
+и [Ручная настройка](#ручная-настройка).
+
+## Принципы работы
+
+### Шифрование соединений с etcd (TLS)
+
+Варианты настройки:
+- Без шифрования (http)
+- С шифрованием (https)
+- С шифрованием и аутентификацией по клиентским сертификатам. Используется либо тот
+  же сертификат, что используется для аутентификации на стороне OSD (`cert`+`pkey` / `osd_cert`+`osd_pkey`),
+  либо отдельно указанный сертификат (`etcd_client_cert`+`etcd_client_key`)
+
+### Шифрование соединений с OSD (AES-GCM)
+
+Варианты настройки:
+- Без шифрования и без контрольных сумм: `proto_checksums=none`.
+- Без шифрования, с контрольными суммами данных: `proto_checksums=payload` (можно не указывать,
+  т.к. это значение по умолчанию). При этом контрольные суммы можно отключить на стороне
+  клиента и можно использовать более старые версии клиента, не поддерживающие контрольные суммы.
+  Если нужно запретить подключение клиентов без контрольных сумм, можно использовать опцию
+  `force_proto_checksums=payload`.
+- С шифрованием заголовков и контрольными суммами данных: активируется при установленных опциях
+  `cert`, `pkey`, `osd_ca` на стороне клиента и `osd_cert`, `osd_pkey`, `osd_ca`, `client_ca`
+  на стороне OSD, при `proto_checksums=payload`. При этом по умолчанию запрещается
+  отключение контрольных сумм на уровне клиента, то есть используется `force_proto_checksums=payload`.
+- С полным шифрованием всего трафика: аналогично прошлому варианту, но с `proto_checksums=gcm`.
+  Клиенту при этом по умолчанию разрешается понизить уровень защиты до контрольных сумм, но
+  это тоже можно запретить через `force_proto_checksums=gcm`. Данный вариант самый медленный и
+  рекомендуется только для небезопасных (публичных) сетей. В том числе потому, что при использовании
+  и полного шифрования трафика, и сквозного шифрования образов AES-XTS, данные шифруются дважды.
+
+Для шифрования используется алгоритм AES-256-GCM и собственный упрощённый протокол согласования
+ключей, полностью аналогичный TLS 1.3 ECDHE.
+
+### Сквозное шифрование данных образов (AES-XTS)
+
+Клиент Vitastor поддерживает шифрование данных каждого образа своим ключом. В этом случае на OSD
+уходят уже зашифрованные данные и сами OSD не видят исходные данные клиента. При этом ключ можно
+менять при клонировании/создании снимков образов. Например, можно сделать базовый образ ВМ
+(условный Debian Linux) нешифрованным, но наследовать от него шифрованные образы клиентских ВМ.
+
+Ключи шифрования образов могут храниться либо в etcd, либо во внешнем Vault. Во втором случае
+в etcd хранятся только ID ключей, а Vitastor вообще не имеет доступа к данным образов. Для
+использования Vault нужно создать образ с опцией `--enc_key vault:ID`, в конфигурации указать
+опции vault_url и vault_ca, создать всем клиентам учётные записи в Vault и дать им доступ
+к требуемым секретам v1.
+
+Ещё раз повторимся, что если AES-XTS используется с полным шифрованием трафика (`proto_checksums=gcm`),
+то данные образов шифруются дважды - сначала AES-XTS, а потом AES-GCM. Можете использовать,
+только если вы совсем параноик :-).
+
+### Аутентификация по сертификатам
+
+При включённом шифровании клиенты, OSD и мониторы Vitastor аутентифицируются по сертификатам
+как при соединениях с etcd (Antietcd), так и с OSD.
+
+Для OSD и мониторов должны использоваться отдельные сертификаты - либо самоподписанные, либо
+подписанные отдельными CA (`osd_ca` и `mon_ca`). При этом все OSD могут использовать один и
+тот же сертификат и все мониторы тоже могут использовать один и тот же сертификат, так как
+привилегии разных OSD или разных мониторов ничем не отличаются (теоретически можно было бы
+сделать разграничение сертификатов OSD по пулам, но пока что такой необходимости не было).
+
+Также сертификат монитора может быть вообще не нужен, если Antietcd встраивается в сам монитор.
+В этом случае монитор и так имеет доступ ко всем данным etcd прямо в памяти.
+
+### Пользователи и права доступа
+
+При отключённом шифровании трафика Vitastor работает без контроля доступа, то есть,
+любой клиент кластера имеет полный доступ как к слою управлению, так и к слою данных. Такой
+вариант подходит для выделенных доверенных сетей хранения.
+
+При включённом шифровании трафика OSD (хотя бы заголовков) есть возможность задействовать
+контроль доступа, включив опцию `use_perms=true`. При включённой опции каждый пользователь
+(и даже OSD и монитор) может выполнять только те операции, которые ему разрешены.
+
+Каждый обычный пользователь, администратор, OSD или монитор должен иметь свой сертификат,
+подписанный отдельным корневым сертификатом:
+- Для обычных пользователей - `client_ca`. Common Name сертификата при этом должен быть равен
+  имени пользователя. Обычные пользователи могут только читать и модифицировать явным образом
+  разрешённые им образы и не могут менять общее состояние кластера.
+- Для администраторов - `admin_ca`. Администраторы могут читать и модифицировать все образы,
+  а также администрировать кластер: смотреть общую статистику и состояние, создавать и удалять
+  OSD и так далее.
+- Для OSD - `osd_ca`, для мониторов - `mon_ca` (если Antietcd запускаются отдельно от мониторов).
+  OSD и мониторы тоже имеют свои наборы разрешённых операций.
+
+Настройки привилегий для обычных пользователей хранятся в etcd и на данный момент состоят
+всего из одного свойства в ключах `/vitastor/config/user/<имя>`:
+- `groups` - Список имён групп, членом которых пользователь является.
+
+У образов есть следующие свойства:
+- Владелец (`owner`) - имя пользователя, которому разрешено и читать, и менять образ
+- Группа владельцев (`owner_group`) - имя группы владельцев
+- Группа читателей (`reader_group`) - имя группы пользователей, которым разрешено читать образ
+
+И также есть свойство у пула:
+- Группа создателей (`creator_group`) - имя группы пользователей, которым разрешено создавать образы в пуле
+
+Перечень разрешённых операций с данными образов на стороне OSD смотрите в разделе
+[Права доступа к данным OSD](#права-доступа-к-данным-osd).
+
+### Привилегии etcd
+
+Привилегии etcd реализуются через Antietcd во всех режимах работы.
+
+Встроенные привилегии etcd не поддерживаются по причине их многочисленных неудобств:
+- Аутентификация по сертификатам вообще не работает в REST интерфейсе etcd,
+- Привилегии хранятся отдельно от k/v данных и не могут участвовать в транзакциях,
+- Менять привилегии может только администратор (root),
+- Нет поддержки фильтрации диапазонных ответов чтения по привилегиям.
+
+Если используется etcd, то Antietcd выступает в роли фильтрующего прокси, при этом он
+может быть встроен в монитор Vitastor или запущен отдельно. В этом случае etcd должен
+разрешать входящие подключения только от Antietcd, а все остальные компоненты должны
+соединяться с Antietcd.
+
+Если Antietcd запускается в составе монитора Vitastor, то достаточно включить опцию
+`use_perms=true` и задать нужные сертификаты. Если Antietcd запускается отдельно, то
+привилегии нужно включать отдельно опциями Antietcd. Подробнее о настройке смотрите
+раздел [Варианты настройки etcd/Antietcd](#варианты-настройки-etcdantietcd).
+
+Перечень разрешённых операций с данными etcd смотрите в разделе
+[Права доступа к данным etcd](#права-доступа-к-данным-etcd).
+
+## Ручная настройка
+
+### Настройка шифрования соединений OSD
+
+Вам нужно 3 сертификата: один для OSD и по одному для подписи сертификатов клиентов и администраторов.
+Для OSD можно использовать самоподписанный сертификат (osd_ca.crt) или отдельный сертификат (osd.crt),
+подписанный доверенным сертификатом osd_ca.crt. Для клиентов нужно использовать отдельные
+сертификаты, подписанные общим доверенным (client_ca.crt), для администраторов - отдельным доверенным
+(admin_ca.crt).
+
+В конфигурацию Vitastor на серверах OSD нужно добавить:
+- use_perms: true
+- osd_ca: osd_ca.crt
+- client_ca: client_ca.crt
+- admin_ca: admin_ca.crt
+- osd_cert: osd_ca.crt
+- osd_pkey: osd_ca.key
+
+На стороне клиентов:
+- use_perms: true
+- osd_ca: osd_ca.crt
+- cert: client.crt
+- pkey: client.key
+
+### Варианты настройки etcd/Antietcd
+
+Доступны следующие варианты настройки:
+
+#### Mon со встроенным Antietcd
+
+Самый простой вариант. Кроме сертификатов OSD вам нужен всего 1 сертификат для Antietcd (antietcd.crt).
+
+Настройки Vitastor (`/etc/vitastor/vitastor.conf`):
+- etcd_address: [ "http://mon1:2379", ... ] (адреса ваших мониторов с портом 2379)
+- use_perms: true
+- use_antietcd: true
+- antietcd_cert: antietcd.crt
+- antietcd_key: antietcd.key
+- etcd_ca: antietcd.crt
+- osd_ca: osd_ca.crt
+- client_ca: client_ca.crt
+- admin_ca: admin_ca.crt
+
+#### Mon в роли Etcd proxy
+
+Если вы хотите включить привилегии, но остаться на etcd, можно задействовать режим etcd proxy.
+
+Вам понадобится 2 отдельных сертификата: один для etcd (etcd.crt) и один для antietcd (antietcd.crt).
+Клиентский порт etcd должен отличаться от стандартного 2379, например, можно выбрать 2381.
+
+Настройки Vitastor:
+- etcd_address: [ "http://mon1:2379", ... ] (адреса ваших мониторов с портом 2379)
+- use_perms: true
+- use_antietcd: true
+- etcd_proxy:
+  ```
+  {
+    "urls": [ "http://mon1:2381", ... ], // адреса ваших etcd с портом 2381
+    "cert": "antietcd.crt",
+    "key": "antietcd.key",
+    "ca": "etcd.crt"
+  }
+  ```
+- antietcd_cert: antietcd.crt
+- antietcd_key: antietcd.key
+- etcd_ca: antietcd.crt
+- osd_ca: osd_ca.crt
+- client_ca: client_ca.crt
+- admin_ca: admin_ca.crt
+
+Опции командной строки etcd:
+```
+--advertise-client-urls=https://<АДРЕС>:2381 --listen-client-urls=https://<АДРЕС>:2381 \
+--client-cert-auth --cert-file=etcd.crt --key-file=etcd.key --trusted-ca-file=antietcd.crt \
+--peer-client-cert-auth --peer-cert-file=etcd.crt --peer-key-file=etcd.key --peer-trusted-ca-file=etcd.crt
+```
+
+#### Mon с отдельным Antietcd Proxy
+
+Если в дополнение к предыдущему варианту вы хотите разгрузить Antietcd от задач монитора Vitastor,
+можно запустить его отдельно.
+
+Аналогично предыдущему варианту нужно 2 сертификата: один для etcd и один для antietcd, плюс понадобится
+отдельный сертификат для монитора.
+
+Настройки Vitastor:
+- etcd_address: [ "http://mon1:2379", ... ] (адреса ваших мониторов с портом 2379)
+- use_perms: true
+- use_antietcd: false
+- etcd_ca: antietcd.crt
+- osd_ca: osd_ca.crt
+- client_ca: client_ca.crt
+- admin_ca: admin_ca.crt
+- mon_etcd_client_cert: mon_ca.crt
+- mon_etcd_client_key: mon_ca.key
+
+Опции командной строки Antietcd:
+```
+--port 2379 --cert /etc/vitastor/antietcd.crt --key /etc/vitastor/antietcd.key \
+--client_cert_auth 1 --auth_filter /usr/lib/vitastor/mon/vitastor_auth_filter.js \
+--ca /etc/vitastor/client_ca.crt --admin_ca /etc/vitastor/admin_ca.crt \
+--osd_ca /etc/vitastor/osd_ca.crt --mon_ca /etc/vitastor/mon_ca.crt \
+--etcd_proxy url1,url2,... --etcd_ca /etc/vitastor/etcd.crt \
+--etcd_cert /etc/vitastor/antietcd.crt --etcd_key /etc/vitastor/antietcd.key
+```
+
+Опции командной строки etcd (не отличаются от предыдущего варианта):
+```
+--advertise-client-urls=https://<АДРЕС>:2381 --listen-client-urls=https://<АДРЕС>:2381 \
+--client-cert-auth --cert-file=etcd.crt --key-file=etcd.key --trusted-ca-file=antietcd.crt \
+--peer-client-cert-auth --peer-cert-file=etcd.crt --peer-key-file=etcd.key --peer-trusted-ca-file=etcd.crt
+```
+
+#### Отдельный Antietcd без etcd
+
+Аналогично предыдущему варианту, но etcd и его сертификат не нужны:
+
+Настройки Vitastor (не отличаются от предыдущего варианта):
+- etcd_address: [ "http://mon1:2379", ... ] (адреса ваших мониторов с портом 2379)
+- use_perms: true
+- use_antietcd: false
+- etcd_ca: antietcd.crt
+- osd_ca: osd_ca.crt
+- client_ca: client_ca.crt
+- admin_ca: admin_ca.crt
+- mon_etcd_client_cert: mon_ca.crt
+- mon_etcd_client_key: mon_ca.key
+
+Опции командной строки Antietcd:
+```
+--port 2379 --cert /etc/vitastor/antietcd.crt --key /etc/vitastor/antietcd.key \
+--client_cert_auth 1 --auth_filter /usr/lib/vitastor/mon/vitastor_auth_filter.js \
+--ca /etc/vitastor/client_ca.crt --admin_ca /etc/vitastor/admin_ca.crt \
+--osd_ca /etc/vitastor/osd_ca.crt --mon_ca /etc/vitastor/mon_ca.crt \
+--persist_filter /usr/lib/vitastor/mon/vitastor_persist_filter.js
+```
+
+### Настройка Vault/OpenBao
+
+Для использования Vault каждому клиенту, который будет получать из Vault ключи
+образов, нужна учётная запись в Vault. Vitastor поддерживает только аутентификацию
+по клиентским сертификатам, так что все сертификаты клиентов (`cert`+`pkey`) должны
+быть зарегистрированы в Vault и им должен быть дан доступ к соответствующим секретам
+(поддерживается API секретов v1).
+
+Требуемый формат секрета Vault - одно поле `key` в формате шестнадцатеричной строки.
+Используется алгоритм AES-256-XTS, так что длина ключа - 64 байта, то есть строка
+должна состоять из 128 шестнадцатеричных цифр.
+
+Для подключения Vault включите следующие настройки в Vitastor.conf:
+- `vault_url` - адрес Vault (например, `https://vault:8200`)
+- `vault_ca` - сертификат самого Vault
+
+После этого, если создать образ (`vitastor-cli create`) с опцией `--enc_key vault:<ID>`,
+то для получения ключа клиенты Vitastor сначала обратятся к Vault для получения токена
+по адресу `/v1/auth/cert/login`, а потом запросят из Vault сам секрет по адресу `/v1/secret/<ID>`.
+
+#### Пример настройки Vault
+
+Пошаговая инструкция для настройки тестового Vault на примере OpenBao:
+
+1. Если ещё не настроен TLS, генерируем самоподписанный TLS сертификат для Vault:
+   ```
+   openssl req -days 3650 -x509 -addext basicConstraints=critical,CA:TRUE,pathlen:1 --addext subjectAltName=DNS:vault \
+       -new -newkey rsa:4096 -nodes -keyout /etc/openbao/vault.key -out /etc/openbao/vault.crt
+   ```
+   Настраиваем его в `/etc/openbao/openbao.hcl`:
+   ```
+   listener "tcp" {
+       address       = "0.0.0.0:8200"
+       tls_cert_file = "/etc/openbao/vault.crt"
+       tls_key_file  = "/etc/openbao/vault.key"
+   }
+   ```
+   И перезапускаем OpenBao (`systemctl restart openbao`).
+2. Копируем TLS сертификат Vault для Vitastor:
+   ```
+   cp /etc/openbao/vault.crt /etc/vitastor/vault.crt
+   ```
+   Переносим его на все клиентские ноды и прописываем в `/etc/vitastor/vitastor.conf`:
+   ```
+   {
+       ...
+       "vault_url": "http://vault:8200",
+       "vault_ca": "/etc/vitastor/vault.crt"
+   }
+   ```
+3. Проверяем статус Vault:
+   ```
+   bao status -ca-cert /etc/openbao/vault.crt -address=https://vault:8200
+   ```
+4. Инициализируем Vault в тестовом режиме из 1 ноды (с 1 частью ключа):
+   ```
+   bao operator init -n 1 -t 1 -ca-cert /etc/openbao/vault.crt -address=https://vault:8200
+   ```
+5. Разблокируем Vault:
+   ```
+   bao operator unseal -ca-cert /etc/openbao/vault.crt -address=https://vault:8200
+   ```
+6. Включаем аутентификацию по сертификатам:
+   ```
+   bao auth enable -ca-cert /etc/openbao/vault.crt -address=https://vault:8200 cert
+   ```
+7. Включаем секреты v1:
+   ```
+   bao secrets enable -ca-cert /etc/openbao/vault.crt -address=https://vault:8200 -path=secret kv-v1
+   ```
+8. Создаём тестовый секрет:
+   ```
+   bao kv put -ca-cert /etc/openbao/vault.crt -address=https://vault:8200 secret/vitastor/testimg3 key=$(openssl rand -hex 64)
+   ```
+9. Генерируем подписанный сертификат для пользователя Vitastor (там, где у вас есть `client_ca.crt` и `client_ca.key`):
+   ```
+   openssl req -subj '/CN=testimg3' -nodes -new -keyout testimg3.key -out testimg3.csr
+   openssl x509 -req -days 3650 -CA client_ca.crt -CAkey client_ca.key -CAcreateserial -in testimg3.csr -out testimg3.crt
+   rm testimg3.csr
+   ```
+10. Создаём пользователя в Vault и даём ему доступ к секрету:
+    ```
+    cat >testimg3.policy <<EOF
+    path "/secret/vitastor/testimg3" {
+        capabilities = ["read"]
+    }
+    EOF
+
+    bao policy write -ca-cert /etc/openbao/vault.crt -address=https://vault:8200 testimg3 testimg3.policy
+
+    bao write -ca-cert /etc/openbao/vault.crt -address=https://vault:8200 auth/cert/certs/testimg3 \
+        certificate=@testimg3.crt display_name=testimg3 token_ttl=24h token_policies=testimg3
+    ```
+11. Тестируем доступ к секрету:
+    ```
+    curl --cacert /etc/vitastor/vault.crt --cert testimg3.crt --key testimg3.key \
+        --json '{}' https://vault:8200/v1/auth/cert/login
+    ```
+    Будет выведен токен, подставляем его в следующий запрос:
+    ```
+    curl --cacert /etc/vitastor/vault.crt --cert testimg3.crt --key testimg3.key \
+        -H 'X-Vault-Token: <ПОЛУЧЕННЫЙ ТОКЕН>' https://vault:8200/v1/secret/vitastor/testimg3
+    ```
+12. Создаём образ в Vitastor с заданным секретом (от имени администратора или того, кто имеет
+    право создавать образы в вашем пуле):
+    ```
+    vitastor-cli create -s 100G --enc_key vault:vitastor/testimg3 --owner testimg3 testimg3
+    ```
+13. Тестируем доступ к образу от имени пользователя testimg3:
+    ```
+    vitastor-cli --cert testimg3.crt --pkey testimg3.key dd if=/dev/urandom oimg=testimg3 bs=1M count=100
+    ```
+
+## Списки разрешённых операций
+
+### Права доступа к данным etcd
+
+Ниже все названия ключей приведены без общего префикса `/vitastor`.
+
+Разрешённые операции с ключами в Antietcd для обычных пользователей:
+- Только чтение:
+  - Разрешено всегда:
+    - `/config/global`
+    - `/config/node_placement`
+    - `/config/pools`
+    - `/pg/config`
+    - `/osd/state/*`
+    - `/pg/state/*`
+    - `/index/maxid/*`
+  - Для образов, которые [может читать пользователь](#пользователи-и-права-доступа):
+    - `/config/inode/*`
+    - `/index/image/*`
+    - `/inode/stats/*`
+- Чтение и запись:
+  - Для пулов, в которых может создавать образы пользователь:
+    - `/index/maxid/*`
+  - Для образов, которыми владеет пользователь:
+    - `/config/inode/*`
+    - `/index/image/*`
+
+Разрешённые операции с ключами в Antietcd для администраторов:
+- Чтение:
+  - `/stats`
+  - `/mon/*`
+  - `/pg/*`
+  - `/pgstats/*`
+  - `/inode/stats/*`
+  - `/pool/stats/*`
+- Чтение и запись:
+  - `/config/*`
+  - `/osd/*`
+  - `/index/*`
+  - `/pg/config`
+  - `/pg/history/*`
+  - `/stats`
+  - `/history/last_clean_pgs`
+
+Разрешённые операции с ключами в etcd для OSD:
+- Чтение:
+  - `/pg/config`
+  - `/config/*`
+- Чтение и запись:
+  - `/osd/*`
+  - `/pg/state/*`
+  - `/pg/history/*`
+  - `/pgstats/*`
+
+Разрешённые операции с ключами в etcd для мониторов:
+- Чтение:
+  - `/config/*`
+  - `/osd/*`
+  - `/pgstats/*`
+- Чтение и запись:
+  - `/pg/config`
+  - `/stats`
+  - `/history/last_clean_pgs`
+  - `/mon/*`
+  - `/pg/history/*`
+  - `/pg/stats/*`
+  - `/pgstats/*`
+  - `/inode/stats/*`
+  - `/pool/stats/*`
+
+### Права доступа к данным OSD
+
+При включённой опции `use_perms` и шифровании OSD аутентифицирует клиентов по сертификатам
+и разрешает каждому клиенту только то, что ему разрешено согласно модели прав доступа.
+
+Клиентские операции:
+- READ - разрешено для образов, доступных пользователю на чтение.
+- WRITE, DELETE, SCRUB - разрешены для образов, доступных пользователю на запись.
+- SYNC - операция не связана с образом и разрешена всегда.
+- DESCRIBE - операция разрешена только для администраторов (используются командами
+  `vitastor-cli describe` и `fix`).
+- PING - операция разрешена всегда.
+- SHOW_CONFIG - операция разрешена всегда, однако если в ней клиент представляется
+  как OSD, то проверяется, что он использует сертификат, подписанный `osd_ca`.
+- SEC_LIST (листинг) - разрешена другим OSD и администраторам с любыми параметрами,
+  а обычным клиентам разрешена только для запросов, ограниченных образом, доступным
+  пользователю на чтение.
+
+Кластерные операции - разрешаются только другим OSD:
+- SEC_READ
+- SEC_WRITE
+- SEC_WRITE_STABLE
+- SEC_SYNC
+- SEC_STABILIZE
+- SEC_ROLLBACK
+- SEC_DELETE
+- SEC_READ_BMP
+- SEC_LOCK
+
+### Права доступа к API
+
+[vitastor-cli serve](../usage/cli.ru.md#serve) также поддерживает клиентскую
+аутентификацию по сертификатам. Принимаются только сертификаты, подписанные
+`client_ca`. В качестве серверного сертификата используется отдельный сертификат
+`api_cert` с ключом `api_pkey`.
+
+При этом для корректной работы `vitastor-cli serve` он сам должен использовать
+для доступа в Vitastor сертификат администратора (`cert`+`pkey`, подписанный `admin_ca`),
+чтобы корректно обрабатывать любые запросы.
+
+Обычным пользователям (с сертификатами, подписанными `client_ca`) при доступе к API
+разрешаются только API-операции с образами, доступными им либо на чтение (для чтения),
+либо на запись (для модификации):
+
+- image/list - для образов, которые пользователь может читать.
+- image/create - для пулов, в которых пользователю разрешено создавать образы, либо
+  для создания снимков образов, которыми пользователь владеет.
+- image/delete, image/flatten, image/modify - для образов, которыми пользователь владеет.
+
+Все остальные операции разрешаются только администраторам.
+
+## Производительность шифрования
+
+У вас может возникнуть вопрос - а как быстро всё это прекрасное шифрование работает?
+
+Ответ - сильно зависит от процессора. На современных процессорах (при наличии AVX512 с VAES)
+очень быстро - скорость шифрования AES может составлять 10-20 Гбайт/с и выше. В первую очередь
+подразумевается CPU клиентских машин, потому что сквозное шифрование выполняется целиком на
+клиенте, а транспортное хоть также и затрагивает OSD, но у клиента поток один, а OSD на стороне
+сервера много и добавить там ресурсов легче.
+
+На более старых процессорах скорость заметно хуже, например, на Xeon E5 v4 она составляет
+буквально 3 Гбайт/с.
+
+Вы можете оценить производительность своих процессоров с помощью команды `vitastor-cli cpubench`.
+
+Пример вывода (💪 AMD EPYC 9575F):
+
+```
+$ vitastor-cli cpubench
+Vitastor transport encryption benchmark (AES-256-GCM, AES-256-XTS and xxhash3)
+
+Warmup...
+
+No transport encryption, data checksums enabled, e2e unencrypted image
+xxhash3 1 M block... 209000 iterations in 2001 ms = 104447.78 MB/s
+xxhash3 4 K block... 37000000 iterations in 2022 ms = 71479.35 MB/s
+
+Header encryption with payload checksums, e2e unencrypted image
+AES-256-GCM encrypt header + xxhash3 1 M block... 210000 iterations in 2015 ms = 104218.36 MB/s
+AES-256-GCM encrypt header + xxhash3 4 K block... 26000000 iterations in 2073 ms = 48993.01 MB/s
+
+Full transport encryption, e2e unencrypted image
+AES-256-GCM encrypt header and 1 M block... 54000 iterations in 2000 ms = 27000.00 MB/s
+AES-256-GCM encrypt header and 4 K block... 11700000 iterations in 2014 ms = 22692.71 MB/s
+
+No transport encryption, no checksums, e2e encrypted image
+AES-256-XTS encrypt 1 M block... 50000 iterations in 2039 ms = 24521.82 MB/s
+AES-256-XTS encrypt 4 K block... 12600000 iterations in 2009 ms = 24499.13 MB/s
+
+No transport encryption, e2e encrypted image, data checksums enabled
+AES-256-XTS encrypt + xxhash3 1 M block... 40000 iterations in 2013 ms = 19870.84 MB/s
+AES-256-XTS encrypt + xxhash3 4 K block... 10200000 iterations in 2011 ms = 19812.90 MB/s
+
+Header encryption with payload checksums, e2e encrypted image
+AES-256-GCM encrypt header + AES-256-XTS encrypt + xxhash3 1 M block... 40000 iterations in 2014 ms = 19860.97 MB/s
+AES-256-GCM encrypt header + AES-256-XTS encrypt + xxhash3 4 K block... 8700000 iterations in 2011 ms = 16899.24 MB/s
+
+Full transport encryption, e2e encrypted image
+AES-256-XTS + AES-256-GCM encrypt 1 M block... 26000 iterations in 2062 ms = 12609.12 MB/s
+AES-256-XTS + AES-256-GCM encrypt 4 K block... 6300000 iterations in 2006 ms = 12267.88 MB/s
+```
+
+А вот Xeon E5-2680v4:
+
+```
+$ vitastor-cli cpubench
+Vitastor transport encryption benchmark (AES-256-GCM, AES-256-XTS and xxhash3)
+
+Warmup...
+
+No transport encryption, data checksums enabled, e2e unencrypted image
+xxhash3 1 M block... 62000 iterations in 2021 ms = 30677.88 MB/s
+xxhash3 4 K block... 12400000 iterations in 2006 ms = 24146.31 MB/s
+
+Header encryption with payload checksums, e2e unencrypted image
+AES-256-GCM encrypt header + xxhash3 1 M block... 62000 iterations in 2027 ms = 30587.07 MB/s
+AES-256-GCM encrypt header + xxhash3 4 K block... 6800000 iterations in 2011 ms = 13208.60 MB/s
+
+Full transport encryption, e2e unencrypted image
+AES-256-GCM encrypt header and 1 M block... 7000 iterations in 2317 ms = 3021.15 MB/s
+AES-256-GCM encrypt header and 4 K block... 1500000 iterations in 2102 ms = 2787.52 MB/s
+
+No transport encryption, no checksums, e2e encrypted image
+AES-256-XTS encrypt 1 M block... 7000 iterations in 2317 ms = 3021.15 MB/s
+AES-256-XTS encrypt 4 K block... 1600000 iterations in 2088 ms = 2993.30 MB/s
+
+No transport encryption, e2e encrypted image, data checksums enabled
+AES-256-XTS encrypt + xxhash3 1 M block... 6000 iterations in 2188 ms = 2742.23 MB/s
+AES-256-XTS encrypt + xxhash3 4 K block... 1400000 iterations in 2053 ms = 2663.78 MB/s
+
+Header encryption with payload checksums, e2e encrypted image
+AES-256-GCM encrypt header + AES-256-XTS encrypt + xxhash3 1 M block... 6000 iterations in 2190 ms = 2739.73 MB/s
+AES-256-GCM encrypt header + AES-256-XTS encrypt + xxhash3 4 K block... 1300000 iterations in 2101 ms = 2417.00 MB/s
+
+Full transport encryption, e2e encrypted image
+AES-256-XTS + AES-256-GCM encrypt 1 M block... 4000 iterations in 2666 ms = 1500.38 MB/s
+AES-256-XTS + AES-256-GCM encrypt 4 K block... 800000 iterations in 2113 ms = 1478.94 MB/s
+```

mon/antietcd_adapter.js

@@ -3,6 +3,7 @@
 
 const AntiEtcd = require('antietcd');
 
+const vitastor_auth_filter = require('./vitastor_auth_filter.js');
 const vitastor_persist_filter = require('./vitastor_persist_filter.js');
 const { b64, local_ips } = require('./utils.js');
 
@@ -27,7 +28,17 @@ class AntiEtcdAdapter
             is_local['::'] = true;
             is_local[''] = true;
             // split :, 3 -> <schema>:<//ip>:<port>
-            const selected = cluster.map(s => s.split(':', 3)).filter(ip => is_local[ip[1].substr(2)] && (!cfg_port || ip[2] == cfg_port));
+            const selected = [];
+            for (let i = 0; i < cluster.length; i++)
+            {
+                const m = /^(https?:\/\/)?(?:\[(.*)\]|([^\[\:]+))(?::(\d+))?$/.exec(cluster[i]);
+                if (!m)
+                    continue;
+                const ip = m[3] || m[2];
+                const port = m[4] || 2379;
+                if (is_local[ip] && (!cfg_port || port == cfg_port))
+                    selected.push({ idx: i, ip, port });
+            }
             if (selected.length > 1)
             {
                 console.error('More than 1 etcd_address matches local IPs, please specify port');
@@ -36,19 +47,46 @@ class AntiEtcdAdapter
             else if (selected.length == 1)
             {
                 const antietcd_config = {
-                    ip: selected[0][1].substr(2),
-                    port: selected[0][2],
+                    ip: selected[0].ip,
+                    port: selected[0].port,
                     cert: config.antietcd_cert,
                     key: config.antietcd_key,
-                    ca: config.etcd_ca,
-                    data: config.antietcd_data_file || ((config.antietcd_data_dir || '/var/lib/vitastor') + '/mon_'+selected[0][2]+'.json.gz'),
+                    ca: config.client_ca,
+                    data: config.antietcd_data_file || ((config.antietcd_data_dir || '/var/lib/vitastor') + '/mon_'+selected[0].port+'.json.gz'),
                     persist_filter: vitastor_persist_filter({ vitastor_prefix: config.etcd_prefix || '/vitastor' }),
-                    node_id: selected[0][1].substr(2)+':'+selected[0][2], // node_id = ip:port
+                    node_id: cluster[selected[0].idx].replace(/^(https?:\/\/)/, ''), // same as in <cluster> below
                     cluster: (cluster.length == 1 ? null : cluster.reduce((a, c) => { a[c.replace(/^(https?:\/\/)/, '')] = c; return a; }, {})),
                     cluster_key: (config.etcd_prefix || '/vitastor'),
                     stale_read: 1,
                     log_level: 1,
+                    logs: { cluster: true },
                 };
+                if (config.etcd_proxy)
+                {
+                    // Monitor may use the builtin etcd_proxy mode
+                    if (!config.etcd_proxy.urls)
+                    {
+                        console.error('etcd_proxy.urls are empty');
+                        process.exit(1);
+                    }
+                    antietcd_config.etcd_proxy = config.etcd_proxy.urls;
+                    antietcd_config.etcd_cert = config.etcd_proxy.cert;
+                    antietcd_config.etcd_key = config.etcd_proxy.key;
+                    antietcd_config.etcd_ca = config.etcd_proxy.ca;
+                    delete antietcd_config.data;
+                    delete antietcd_config.persist_filter;
+                    delete antietcd_config.cluster;
+                    delete antietcd_config.cluster_key;
+                }
+                if (config.use_perms)
+                {
+                    antietcd_config.client_cert_auth = true;
+                    antietcd_config.auth_filter = vitastor_auth_filter;
+                    antietcd_config.ca = config.client_ca;
+                    antietcd_config.osd_ca = config.osd_ca;
+                    antietcd_config.mon_ca = config.mon_ca;
+                    antietcd_config.admin_ca = config.admin_ca;
+                }
                 for (const key in config)
                 {
                     if (key.substr(0, 9) === 'antietcd_')
@@ -173,7 +211,7 @@ class AntiEtcdAdapter
                     await new Promise(ok => setTimeout(ok, timeout-(Date.now()-prev)));
                 }
                 prev = Date.now();
-                const res = await this.antietcd.api(path.replace(/^\/+/, '').replace(/\/+$/, '').replace(/\/+/g, '_'), body);
+                const res = await this.antietcd.api(path.replace(/^\/+/, '').replace(/\/+$/, '').replace(/\/+/g, '_'), body, { user_type: 'mon' });
                 if (res.error)
                 {
                     console.error('Failed to query antietcd '+path+' (retry '+retry+'/'+retries+'): '+res.error);

mon/etcd_schema.js

@@ -16,6 +16,7 @@ const etcd_allow = new RegExp('^'+[
     'config/pools',
     'config/osd/[1-9]\\d*',
     'config/pgs', // old name
+    'config/user/.*',
     'pg/config',
     'config/inode/[1-9]\\d*/[1-9]\\d*',
     'osd/state/[1-9]\\d*',
@@ -64,6 +65,8 @@ const etcd_tree = {
             placement_levels: { datacenter: 1, rack: 2, host: 3, osd: 4, ... },
             use_old_pg_combinator: false,
             osd_backfillfull_ratio: 0.99,
+            mon_metrics_path: '/prometheus',
+            mon_healthcheck_path: '/healthcheck',
             // client and osd
             tcp_header_buffer_size: 65536,
             use_sync_send_recv: false,
@@ -208,6 +211,8 @@ const etcd_tree = {
                 primary_affinity_tags?: 'nvme' | [ 'nvme', ... ],
                 // scrub interval
                 scrub_interval?: '30d',
+                // users allowed to create images in this pool
+                creator_group?: '',
             },
             ...
         }, */
@@ -225,11 +230,20 @@ const etcd_tree = {
                     readonly?: boolean,
                     deleted?: boolean,
                     enc_key?: string,
-                    meta?: any,
+                    owner?: string,
+                    owner_group?: string,
+                    reader_group?: string,
                 }
             }
         }, */
         inode: {},
+        /* user: {
+            <username>: {
+                type: 'osd'|'mon'|'admin'|'client',
+                groups: string[],
+            },
+        }, */
+        user: {},
     },
     osd: {
         state: {
@@ -392,7 +406,6 @@ const etcd_tree = {
             /* <name>: {
                 id: uint64_t,
                 pool_id: uint64_t,
-                // ...plus a copy of everything from config/inode/x/y
             }, */
         },
         maxid: {

mon/lp_optimizer/lp_optimizer.js

@@ -112,9 +112,10 @@ function make_cyclic(pgs, parity_space)
 {
     if (parity_space > 1)
     {
-        for (const pg in pgs)
+        for (const id in pgs)
         {
-            for (let i = 1; i < pg.size; i++)
+            const pg = pgs[id];
+            for (let i = 1; i < pg.length; i++)
             {
                 const cyclic = [ ...pg.slice(i), ...pg.slice(0, i) ];
                 pgs['pg_'+cyclic.join('_')] = cyclic;

mon/mon.js

@@ -87,7 +87,7 @@ class Mon
             this.http = await create_http_server(this.config, (req, res) =>
             {
                 const u = new URL(req.url, 'http://'+(req.headers.host || 'localhost'));
-                if (u.pathname.replace(/\/+$/, '') == (this.config.prometheus_path||'/metrics'))
+                if (u.pathname.replace(/\/+$/, '') == (this.config.mon_metrics_path||'/metrics'))
                 {
                     if (!this.watcher_active)
                     {
@@ -100,6 +100,19 @@ class Mon
                         res.write(export_prometheus_metrics(this.state));
                     }
                 }
+                else if (u.pathname.replace(/\/+$/, '') == (this.config.mon_healthcheck_path||'/healthcheck'))
+                {
+                    if (!this.watcher_active)
+                    {
+                        res.writeHead(503);
+                        res.write('Monitor is in standby mode. Please retrieve metrics from master monitor instance\n');
+                    }
+                    else
+                    {
+                        res.setHeader('Content-Type', 'text/plain; version=0.0.4; charset=utf-8');
+                        res.write('Monitor is active');
+                    }
+                }
                 else
                 {
                     res.writeHead(404);
@@ -627,7 +640,7 @@ class Mon
                 if (this.state.pg.history[pool_id] &&
                     this.state.pg.history[pool_id][pg])
                 {
-                    pg_history[pg-1] = this.state.pg.history[pool_id][pg];
+                    pg_history[pg-1] = JSON.parse(JSON.stringify(this.state.pg.history[pool_id][pg]));
                 }
             }
             const real_prev_pgs = [];
@@ -719,7 +732,7 @@ class Mon
                 this.next_recheck_timer = null;
                 this.next_recheck_at = 0;
                 this.schedule_recheck();
-            }, now-this.next_recheck_at);
+            }, (this.next_recheck_at-now)*1000);
         }
     }
 

mon/package.json

@@ -1,6 +1,6 @@
 {
   "name": "vitastor-mon",
-  "version": "3.0.5",
+  "version": "3.2.1",
   "description": "Vitastor SDS monitor service",
   "main": "mon-main.js",
   "scripts": {
@@ -9,7 +9,7 @@
   "author": "Vitaliy Filippov",
   "license": "UNLICENSED",
   "dependencies": {
-    "antietcd": "^1.2.4",
+    "antietcd": "^1.3.3",
     "sprintf-js": "^1.1.2",
     "ws": "^7.2.5"
   },

mon/pg_utils.js

@@ -84,7 +84,7 @@ function scale_pg_history(prev_pg_history, prev_pgs, new_pgs)
         finish_pg_history(merged_history[1]);
         for (let i = 0; i < new_pg_count; i++)
         {
-            new_pg_history[i] = { ...merged_history[1] };
+            new_pg_history[i] = JSON.parse(JSON.stringify(merged_history[1]));
         }
     }
     // Mark history keys for removed PGs as removed
@@ -102,7 +102,7 @@ function scale_pg_count(prev_pgs, new_pg_count)
     {
         for (let i = prev_pgs.length; i < new_pg_count; i++)
         {
-            prev_pgs[i] = prev_pgs[i % prev_pgs.length];
+            prev_pgs[i] = [ ...prev_pgs[i % prev_pgs.length] ];
         }
     }
     else if (prev_pgs.length > new_pg_count)

mon/pool_config.js

@@ -3,6 +3,9 @@
 
 const { parse_level_indexes, parse_pg_dsl } = require('./lp_optimizer/dsl_pgs.js');
 
+const MIN_DATA_BLOCK_SIZE = 4096;
+const MAX_DATA_BLOCK_SIZE = 128*1024*1024;
+
 function validate_pool_cfg(pool_id, pool_cfg, placement_levels, warn)
 {
     pool_cfg.pg_size = Math.floor(pool_cfg.pg_size);
@@ -23,7 +26,8 @@ function validate_pool_cfg(pool_id, pool_cfg, placement_levels, warn)
             console.log('Pool '+pool_id+' has invalid coding scheme (one of "xor", "replicated", "ec" and "jerasure" required)');
         return false;
     }
-    if (!pool_cfg.pg_size || pool_cfg.pg_size < 1 || pool_cfg.pg_size > 256 ||
+    // OSDs don't support pg_size > 64 for now
+    if (!pool_cfg.pg_size || pool_cfg.pg_size < 1 || pool_cfg.pg_size > 64 ||
         pool_cfg.scheme !== 'replicated' && pool_cfg.pg_size < 3)
     {
         if (warn)
@@ -50,6 +54,18 @@ function validate_pool_cfg(pool_id, pool_cfg, placement_levels, warn)
             console.log('Pool '+pool_id+' has invalid parity_chunks (must be between 1 and pg_size-2)');
         return false;
     }
+    if (pool_cfg.block_size &&
+        (!Number(pool_cfg.block_size) || (pool_cfg.block_size & (pool_cfg.block_size-1)) ||
+        pool_cfg.block_size < MIN_DATA_BLOCK_SIZE || pool_cfg.block_size > MAX_DATA_BLOCK_SIZE ||
+        pool_cfg.scheme !== 'replicated' && pool_cfg.block_size*pool_cfg.pg_size > 0xFFFFFFFF))
+    {
+        if (warn)
+        {
+            console.log('Pool '+pool_id+' has invalid block_size (must be a power of two between '+
+                MIN_DATA_BLOCK_SIZE+' and '+MAX_DATA_BLOCK_SIZE+'; must not exceed 2^32-1 when multiplied by pg_size)');
+        }
+        return false;
+    }
     if (!pool_cfg.pg_count || pool_cfg.pg_count < 1)
     {
         if (warn)

mon/scripts/make-etcd

@@ -1,50 +1,104 @@
 #!/usr/bin/node
-// Simple systemd unit generator for etcd
+// Simple Vitastor etcd / antietcd / TLS configurator
 // Copyright (c) Vitaliy Filippov, 2019+
 // License: MIT
 
-// USAGE:
-// 1) Put the same etcd_address into /etc/vitastor/vitastor.conf on all monitor nodes
-// 2) Run ./make-etcd.js. It will create the etcd service on one of specified IPs
-
 const child_process = require('child_process');
 const fs = require('fs');
 const os = require('os');
+const path = require('path');
+const readline = require('readline');
 
-run().catch(e => { console.error(e); process.exit(1); });
+const help_text = `Initialize a Vitastor cluster (etcd, vitastor.conf and TLS certificates)
+(c) Vitaliy Filippov, 2026+ (MIT)
+
+USAGE:
+1) Create a minimal vitastor.conf with etcd_address, osd_network and (optionally) use_perms.
+   Non-encrypted: {"etcd_address":["http://10.0.0.10:2379","http://10.0.0.11:2379","http://10.0.0.12:2379"],"osd_network":"10.0.0.0/24"}
+   Encrypted: {"etcd_address":["https://10.0.0.10:2379","https://10.0.0.11:2379","https://10.0.0.12:2379"],"use_perms":true,"osd_network":"10.0.0.0/24"}
+   (Note https:// etcd URLs!)
+2) Run: ${process.argv[1]} [./vitastor.conf] [--antietcd-only]
+   You can run it on etcd/monitor nodes or on an external node.
+   It configures etcd, generates TLS certificates (on the first or external node), copies
+   them to other etcd/monitor nodes using root ssh, and updates vitastor.conf with TLS options.
+   You can also copy configuration and certificates manually.
+3) If you have OSD-only nodes, run:
+   ${process.argv[1]} --copy-to-osd-node NODE_NAME ./vitastor.conf
+   It copies vitastor.conf and required TLS certificates to that node.
+
+OPTIONS:
+--antietcd-only
+    disable etcd (proxy or direct mode), use only antietcd
+--gen-certs
+    force certificate generation even if it's not the first node
+--no-certs
+    disable certificate generation
+--copy yes|no|ask
+    copy vitastor.conf and TLS certificates for monitor&etcd to monitor nodes using scp
+    (default is ask)
+--copy-to-osd-node NODE[,NODE2,...]
+    copy vitastor.conf and TLS certificates for OSDs to NODES using scp
+`;
 
 async function run()
 {
-    const config_path = process.argv[2] || '/etc/vitastor/vitastor.conf';
-    if (config_path == '-h' || config_path == '--help')
+    let config_path = '/etc/vitastor/vitastor.conf';
+    let config_dir = '/etc/vitastor';
+    let gen_certs = 'auto';
+    let antietcd_only = false;
+    let copy = 'ask';
+    let copy_to_osd = null;
+    for (let i = 2; i < process.argv.length; i++)
     {
-        console.log(
-            'Initialize systemd etcd service for Vitastor\n'+
-            '(c) Vitaliy Filippov, 2019+ (MIT)\n'+
-            '\n'+
-            'USAGE:\n'+
-            '1) Put the same etcd_address into /etc/vitastor/vitastor.conf on all monitor nodes\n'+
-            '2) Run '+process.argv[1]+' [config_path]\n'
-        );
-        process.exit(0);
+        const arg = process.argv[i];
+        if (arg == '-h' || arg == '--help')
+        {
+            console.log(help_text);
+            process.exit(0);
+        }
+        else if (arg == '--gen-certs')
+        {
+            gen_certs = true;
+        }
+        else if (arg == '--no-certs')
+        {
+            gen_certs = false;
+        }
+        else if (arg == '--antietcd-only')
+        {
+            antietcd_only = true;
+        }
+        else if (arg == '--copy-to-osd-node' && i < process.argv.length-1)
+        {
+            i++;
+            copy_to_osd = process.argv[i].split(/,/);
+        }
+        else if (arg == '--copy' && i < process.argv.length-1)
+        {
+            i++;
+            copy = process.argv[i];
+            if (copy !== 'ask' && copy !== 'yes' && copy !== 'no')
+            {
+                console.error('--copy should be "ask", "yes" or "no"');
+                process.exit(1);
+            }
+        }
+        else if (arg[0] == '-')
+        {
+            console.error('Unknown option: '+arg[0]);
+            process.exit(1);
+        }
+        else
+        {
+            config_path = arg;
+            config_dir = path.dirname(arg);
+        }
     }
     if (!fs.existsSync(config_path))
     {
         console.log(config_path+' is missing');
         process.exit(1);
     }
-    const in_docker = fs.existsSync("/etc/vitastor/etcd.conf") &&
-        fs.existsSync("/etc/vitastor/docker.conf");
-    if (!in_docker && fs.existsSync("/etc/systemd/system/vitastor-etcd.service"))
-    {
-        console.log("/etc/systemd/system/vitastor-etcd.service already exists");
-        process.exit(1);
-    }
-    if (!in_docker && fs.existsSync("/etc/systemd/system/etcd.service"))
-    {
-        console.log("/etc/systemd/system/etcd.service already exists");
-        process.exit(1);
-    }
     const config = JSON.parse(fs.readFileSync(config_path, { encoding: 'utf-8' }));
     if (!config.etcd_address)
     {
@@ -52,30 +106,307 @@ async function run()
         process.exit(1);
     }
     const etcds = (config.etcd_address instanceof Array ? config.etcd_address : (''+config.etcd_address).split(/,/))
-        .map(s => (''+s).replace(/^https?:\/\/|(:\d+)?(\/.*)?$/g, '').replace(/^\[(.*)\]$/, '$1').toLowerCase());
+        .map(s => /^(https?):\/\/(\[[^\]]+\]|[^\[\]\:\/]+)(?::(\d+))?/.exec(s.toLowerCase()))
+        .filter(s => s)
+        .map(s => ({
+            scheme: s[1],
+            addr: s[2].indexOf(':') >= 0 && s[2][0] != '[' ? '['+s[2]+']' : s[2],
+            ip: s[2][0] == '[' ? s[2].substr(1, s[2].length-2) : s[2],
+            port: s[3],
+        }));
+    const tls = etcds.filter(e => e.scheme === 'https').length > 0;
+    const use_perms = tls && config.use_perms;
     const num = select_local_etcd(etcds);
+    if (copy_to_osd)
+    {
+        copy_to_osd_nodes(copy_to_osd, config_dir, use_perms, antietcd_only);
+        process.exit(0);
+    }
+    if (tls)
+    {
+        const etcd_ca = config_dir+'/'+path.basename(config.etcd_ca || '/etc/vitastor/etcd_ca.crt');
+        if (gen_certs === true)
+        {
+            console.log('Certificate generation is requested explicitly, generating');
+        }
+        else if (gen_certs === false)
+        {
+            console.log('Certificate generation is disabled explicitly, skipping');
+        }
+        else if (num < 0)
+        {
+            gen_certs = true;
+            console.log('No matching IPs in etcd_address from '+config_path+', only generating certificates');
+        }
+        else if (config.etcd_ca && fs.existsSync(etcd_ca))
+        {
+            gen_certs = false;
+            console.log(etcd_ca+' already exists, assuming certificates are already generated');
+        }
+        else if (num === 0)
+        {
+            gen_certs = true;
+            console.log('This is monitor node 1, generating certificates');
+        }
+        else
+        {
+            console.log('This is monitor node '+(num+1)+', '+etcd_ca+' does not exist, please copy certificates to this node');
+            process.exit(1);
+        }
+        await write_auth_config(config, config_path, etcds, use_perms, antietcd_only);
+        if (gen_certs)
+        {
+            if (copy === 'ask')
+                copy = await ask_copy('Copy certificates and vitastor.conf to other nodes and start them (requires root ssh)? ');
+            copy = (copy === 'y' || copy === 'yes');
+            await make_certs(config_dir, copy, etcds, num, use_perms, antietcd_only);
+        }
+    }
+    else if (num <= 0)
+    {
+        if (copy === 'ask')
+            copy = await ask_copy('Copy vitastor.conf to other nodes and start them (requires root ssh)? ');
+        if (copy === 'y' || copy === 'yes')
+            await copy_nontls(config_dir, etcds, num);
+    }
     if (num < 0)
     {
         console.log('No matching IPs in etcd_address from '+config_path);
-        process.exit(0);
+        process.exit(tls && gen_certs ? 0 : 1);
     }
-    const etcd_url = 'http://' + (etcds[num].indexOf(':') >= 0 ? '['+etcds[num]+']' : etcds[num]);
-    const etcd_name = 'etcd'+etcds[num].replace(/[^0-9a-z_]/ig, '_');
-    const etcd_cluster = etcds.map(e => `etcd${e.replace(/[^0-9a-z_]/ig, '_')}=http://${e.indexOf(':') >= 0 ? '['+e+']' : e}:2380`).join(',');
+    await configure_etcd(etcds, num, tls, use_perms);
+    process.exit(0);
+}
+
+async function ask_copy(question)
+{
+    const rl = readline.createInterface({
+        input: process.stdin,
+        output: process.stdout,
+        prompt: '> ',
+    });
+    let copy;
+    while (copy != 'y' && copy != 'n' && copy != 'yes' && copy != 'no')
+    {
+        if (copy)
+            console.log('Please type "yes" or "no"');
+        copy = await new Promise(ok => rl.question(question, ok));
+    }
+    return copy;
+}
+
+async function copy_to_osd_nodes(to, dir, use_perms, antietcd_only)
+{
+    const osd_to_copy = [ 'vitastor.conf' ];
+    if (!antietcd_only && !use_perms)
+        osd_to_copy.push('etcd_ca.crt');
+    else
+        osd_to_copy.push('antietcd_ca.crt');
+    if (use_perms)
+        osd_to_copy.push('osd.crt', 'osd.key', 'client_ca.crt');
+    console.warn('Copying configuration to OSD nodes '+to.join(', '));
+    for (const node of to)
+        await system("scp "+dir+"/"+osd_to_copy.join(" "+dir+"/")+" root@"+(node.indexOf(':') >= 0 ? "["+node+"]" : node)+":/etc/vitastor/");
+}
+
+async function make_certs(dir, copy, etcds, num, use_perms, antietcd_only)
+{
+    console.log(`-----
+Generating certificates in ${dir}
+-----
+`);
+    const to_copy = [ 'vitastor.conf' ];
+    const osd_to_copy = [ 'vitastor.conf' ];
+    if (!antietcd_only)
+    {
+        await make_ca("/O=Vitastor etcd CA", dir+"/etcd_ca");
+        await make_signed("/CN=Vitastor etcd", dir+"/etcd", dir+"/etcd_ca", etcds.map(e => "IP:"+e.ip).join(','));
+        to_copy.push('etcd_ca.crt', 'etcd.crt', 'etcd.key');
+        if (!use_perms)
+            osd_to_copy.push('etcd_ca.crt');
+    }
+    if (use_perms || antietcd_only)
+    {
+        await make_ca("/O=Vitastor Antietcd CA", dir+"/antietcd_ca");
+        await make_signed("/CN=Vitastor Antietcd", dir+"/antietcd", dir+"/antietcd_ca", etcds.map(e => "IP:"+e.ip).join(','));
+        to_copy.push('antietcd_ca.crt', 'antietcd.crt', 'antietcd.key');
+        osd_to_copy.push('antietcd_ca.crt');
+    }
+    if (use_perms)
+    {
+        await make_ca("/CN=Vitastor OSD", dir+"/osd");
+        await make_ca("/O=Vitastor Client CA", dir+"/client_ca");
+        await make_ca("/O=Vitastor Admin CA", dir+"/admin_ca");
+        await make_signed("/CN=admin", dir+"/admin", dir+"/admin_ca");
+        to_copy.push('osd.crt', 'osd.key', 'client_ca.crt', 'admin_ca.crt', 'admin.crt', 'admin.key');
+        osd_to_copy.push('osd.crt', 'osd.key', 'client_ca.crt', 'admin_ca.crt', 'admin.crt', 'admin.key');
+    }
+    console.log(`-----
+Certificates generated, commands to copy them:
+- Monitor+OSD node:
+  cd ${dir} && scp ${to_copy.join(' ')} root@NODE:/etc/vitastor/
+- Monitor node:
+  cd ${dir} && scp ${to_copy.filter(f => f != 'osd.key').join(' ')} root@NODE:/etc/vitastor/
+- OSD node:
+  cd ${dir} && scp ${osd_to_copy.join(' ')} root@NODE:/etc/vitastor/
+Then don't forget to run:
+chown vitastor:vitastor /etc/vitastor/*.key && /usr/lib/vitastor/mon/make-etcd
+-----
+`);
+    if (copy)
+    {
+        for (let i = 0; i < etcds.length; i++)
+        {
+            if (i == num)
+                continue;
+            const node = etcds[i];
+            await system("scp "+dir+"/"+to_copy.join(" "+dir+"/")+" root@"+(node.ip.indexOf(':') >= 0 ? "["+node.ip+"]" : node.ip)+
+                ":/etc/vitastor/ && ssh root@"+node.ip+" 'chown vitastor:vitastor /etc/vitastor/*.key && /usr/lib/vitastor/mon/make-etcd'");
+        }
+    }
+    else
+    {
+        console.warn('Certificates generated in '+dir+', please copy them to other nodes');
+    }
+}
+
+async function copy_nontls(dir, etcds, num)
+{
+    const to_copy = [ 'vitastor.conf' ];
+    for (let i = 0; i < etcds.length; i++)
+    {
+        if (i == num)
+            continue;
+        const node = etcds[i];
+        await system("scp "+dir+"/"+to_copy.join(" "+dir+"/")+" root@"+(node.ip.indexOf(':') >= 0 ? "["+node.ip+"]" : node.ip)+
+            ":/etc/vitastor/ && ssh root@"+node.ip+" '/usr/lib/vitastor/mon/make-etcd'");
+    }
+}
+
+async function write_auth_config(config, config_path, etcds, use_perms, antietcd_only)
+{
+    const auth = {};
+    if (use_perms)
+    {
+        auth["use_antietcd"] = true;
+        if (!antietcd_only)
+        {
+            auth["etcd_proxy"] = {
+                urls: etcds.map(e => (e.ip.indexOf(':') >= 0 ? '['+e.ip+']' : e.ip)+':2381'),
+                cert: "/etc/vitastor/antietcd.crt",
+                key: "/etc/vitastor/antietcd.key",
+                ca: "/etc/vitastor/etcd_ca.crt",
+            };
+        }
+        auth["antietcd_cert"] = "/etc/vitastor/antietcd.crt";
+        auth["antietcd_key"] = "/etc/vitastor/antietcd.key";
+        auth["etcd_ca"] = "/etc/vitastor/antietcd_ca.crt";
+        auth["osd_cert"] = "/etc/vitastor/osd.crt";
+        auth["osd_pkey"] = "/etc/vitastor/osd.key";
+        auth["osd_ca"] = "/etc/vitastor/osd.crt";
+        auth["client_ca"] = "/etc/vitastor/client_ca.crt";
+        auth["admin_ca"] = "/etc/vitastor/admin_ca.crt";
+        auth["cert"] = "/etc/vitastor/admin.crt";
+        auth["pkey"] = "/etc/vitastor/admin.key";
+    }
+    else
+    {
+        if (antietcd_only)
+        {
+            auth["use_antietcd"] = true;
+            auth["antietcd_cert"] = "/etc/vitastor/antietcd.crt";
+            auth["antietcd_key"] = "/etc/vitastor/antietcd.key";
+            auth["etcd_ca"] = "/etc/vitastor/antietcd_ca.crt";
+        }
+        else
+        {
+            auth["etcd_ca"] = "/etc/vitastor/etcd.crt";
+        }
+    }
+    for (const k in auth)
+    {
+        if ((k in config) && JSON.stringify(auth[k]) != JSON.stringify(config[k]))
+        {
+            // Auth options already overridden with non-default
+            console.log(k+" is already overridden in "+config_path+", skipping config update");
+            return;
+        }
+    }
+    for (const k in auth)
+    {
+        config[k] = auth[k];
+    }
+    console.log(`-----
+Updating ${config_path}
+-----
+`);
+    fs.writeFileSync(config_path, JSON.stringify(config, 0, 4));
+}
+
+async function configure_etcd(etcds, num, tls, use_perms)
+{
+    const in_docker = fs.existsSync("/etc/vitastor/etcd.conf") &&
+        fs.existsSync("/etc/vitastor/docker.conf");
+    if (!in_docker && fs.existsSync("/etc/systemd/system/vitastor-etcd.service") &&
+        fs.existsSync("/etc/vitastor/etcd.conf"))
+    {
+        console.log("/etc/systemd/system/vitastor-etcd.service and /etc/vitastor/etcd.conf already exists. Remove them to reinitialize the cluster");
+        process.exit(1);
+    }
+    if (!in_docker && fs.existsSync("/etc/systemd/system/etcd.service"))
+    {
+        console.log("/etc/systemd/system/etcd.service already exists");
+        process.exit(1);
+    }
+    const etcd_url = etcds[num].scheme + '://' + etcds[num].addr;
+    const options = {
+        name: 'etcd'+etcds[num].ip.replace(/[^0-9a-z_]/ig, '_'),
+        advertise_client_urls: etcd_url+':'+(use_perms ? 2381 : 2379),
+        listen_client_urls: etcd_url+':'+(use_perms ? 2381 : 2379),
+        initial_advertise_peer_urls: etcd_url+':2380',
+        listen_peer_urls: etcd_url+':2380',
+        initial_cluster_token: 'vitastor-etcd-1',
+        initial_cluster_state: 'new',
+        initial_cluster: etcds.map(e => `etcd${e.ip.replace(/[^0-9a-z_]/ig, '_')}=${e.scheme}://${e.addr}:2380`).join(','),
+        snapshot_count: 10000,
+        max_txn_ops: 100000,
+        max_request_bytes: 104857600,
+        auto_compaction_retention: 10,
+        auto_compaction_mode: 'revision',
+    };
+    if (tls)
+    {
+        options['cert_file'] = '/etc/vitastor/etcd.crt';
+        options['key_file'] = '/etc/vitastor/etcd.key';
+        if (use_perms)
+        {
+            options['client_cert_auth'] = '1';
+            options['trusted_ca_file'] = '/etc/vitastor/antietcd_ca.crt';
+        }
+        options['peer_cert_file'] = '/etc/vitastor/etcd.crt';
+        options['peer_key_file'] = '/etc/vitastor/etcd.key';
+        if (use_perms)
+        {
+            options['peer_client_cert_auth'] = '1';
+            options['peer_trusted_ca_file'] = '/etc/vitastor/etcd_ca.crt';
+        }
+    }
+    let etcd_conf = fs.existsSync("/etc/vitastor/etcd.conf")
+        ? fs.readFileSync("/etc/vitastor/etcd.conf", { encoding: 'utf-8' })
+        : "";
+    for (const k in options)
+    {
+        etcd_conf = replace_env(etcd_conf, 'ETCD_'+k.toUpperCase().replace(/-/, '_'), options[k]);
+    }
+    fs.writeFileSync("/etc/vitastor/etcd.conf", etcd_conf);
     if (in_docker)
     {
-        let etcd_conf = fs.readFileSync("/etc/vitastor/etcd.conf", { encoding: 'utf-8' });
-        etcd_conf = replace_env(etcd_conf, 'ETCD_NAME', etcd_name);
-        etcd_conf = replace_env(etcd_conf, 'ETCD_IP', etcds[num]);
-        etcd_conf = replace_env(etcd_conf, 'ETCD_INITIAL_CLUSTER', etcd_cluster);
-        fs.writeFileSync("/etc/vitastor/etcd.conf", etcd_conf);
         console.log('etcd for Vitastor configured. Run `systemctl enable --now vitastor-etcd` to start etcd');
         process.exit(0);
     }
     await system(`mkdir -p /var/lib/etcd/vitastor`);
     fs.writeFileSync(
-        "/etc/systemd/system/vitastor-etcd.service",
-`[Unit]
+        "/etc/systemd/system/vitastor-etcd.service", `[Unit]
 Description=etcd for vitastor
 After=network-online.target local-fs.target time-sync.target
 Wants=network-online.target local-fs.target time-sync.target
@@ -83,12 +414,8 @@ Wants=network-online.target local-fs.target time-sync.target
 [Service]
 Restart=always
 Environment=GOGC=50
-ExecStart=etcd --name ${etcd_name} --data-dir /var/lib/etcd/vitastor \\
-    --snapshot-count 10000 --advertise-client-urls ${etcd_url}:2379 --listen-client-urls ${etcd_url}:2379 \\
-    --initial-advertise-peer-urls ${etcd_url}:2380 --listen-peer-urls ${etcd_url}:2380 \\
-    --initial-cluster-token vitastor-etcd-1 --initial-cluster ${etcd_cluster} \\
-    --initial-cluster-state new --max-txn-ops=100000 --max-request-bytes=104857600 \\
-    --auto-compaction-retention=10 --auto-compaction-mode=revision
+EnvironmentFile=/etc/vitastor/etcd.conf
+ExecStart=etcd --data-dir /var/lib/etcd/vitastor
 WorkingDirectory=/var/lib/etcd/vitastor
 ExecStartPre=+chown -R etcd /var/lib/etcd/vitastor
 User=etcd
@@ -102,37 +429,77 @@ RestartSec=10
 WantedBy=multi-user.target
 `);
     await system(`useradd etcd`);
+    await system(`chown vitastor:vitastor /etc/vitastor/*.key`);
+    if (options['key_file'])
+    {
+        await system(`chown etcd `+options['key_file']);
+    }
     await system(`systemctl daemon-reload`);
     // Disable distribution etcd unit and enable our one
     await system(`systemctl disable --now etcd`);
     await system(`systemctl enable --now vitastor-etcd`);
-    process.exit(0);
+    await system(`systemctl enable --now vitastor-mon`);
 }
 
 function replace_env(text, key, value)
 {
     let found = false;
     text = text.replace(new RegExp('^'+key+'\\s*=.*', 'm'), () => { found = true; return key+'='+value; });
-    return found ? text : text.replace(/\s*$/, '\n')+key+'='+value+'\n';
+    if (found)
+        return text;
+    return (text != '' ? text.replace(/\s*$/, '\n') : '')+key+'='+value+'\n';
 }
 
 function select_local_etcd(etcds)
 {
     const ifaces = os.networkInterfaces();
+    const local = {};
     for (const ifname in ifaces)
+    {
         for (const iface of ifaces[ifname])
-            for (let i = 0; i < etcds.length; i++)
-                if (etcds[i] == iface.address.toLowerCase())
-                    return i;
+        {
+            const addr = iface.address;
+            if (iface.family == 'IPv6')
+                local[addr.toLowerCase()] = local['['+addr.toLowerCase()+']'] = true;
+            else
+                local[addr] = true;
+        }
+    }
+    for (let i = 0; i < etcds.length; i++)
+    {
+        if (local[etcds[i].addr])
+            return i;
+    }
     return -1;
 }
 
 async function system(cmd)
 {
+    console.log('Running '+cmd);
+    process.stdin.pause();
     const cp = child_process.spawn(cmd, { shell: true, stdio: [ 0, 1, 2 ] });
     let finish_cb;
     cp.on('exit', () => finish_cb && finish_cb());
     if (cp.exitCode == null)
         await new Promise(ok => finish_cb = ok);
+    process.stdin.resume();
     return cp.exitCode;
 }
+
+async function make_ca(subj, filename)
+{
+    if (await system("openssl req -days 3650 -x509 -subj '"+subj+"' -addext basicConstraints=critical,CA:TRUE,pathlen:1"+
+        " -new -newkey rsa:4096 -nodes -keyout "+filename+".key -out "+filename+".crt"))
+        process.exit(1);
+}
+
+async function make_signed(subj, f, ca, san)
+{
+    if (await system(`openssl req -subj '${subj}' ${san ? "-addext 'subjectAltName="+san+"'" : ""} -nodes -new -keyout ${f}.key -out ${f}.csr`))
+        process.exit(1);
+    if (await system(`openssl x509 -req -days 3650 -copy_extensions copy -CA ${ca}.crt -CAkey ${ca}.key -CAcreateserial -in ${f}.csr -out ${f}.crt`))
+        process.exit(1);
+    fs.unlinkSync(f+".csr");
+}
+
+run().catch(e => { console.error(e); process.exit(1); });

mon/stats.js

@@ -37,6 +37,7 @@ function derive_osd_stats(st, prev, prev_diff)
         const n = c.count - BigInt(pr && pr.count||0);
         diff.recovery_stats[op] = { ...c, bps: n > 0 ? b*1000n/timediff : 0n, iops: n > 0 ? n*1000n/timediff : 0n };
     }
+    diff.inode_stats = {};
     for (const pool_id in st.inode_stats||{})
     {
         diff.inode_stats[pool_id] = {};

mon/vitastor_auth_filter.js

@@ -0,0 +1,530 @@
+// AntiEtcd authentication filter for Vitastor
+// (c) Vitaliy Filippov, 2026
+// License: Mozilla Public License 2.0 or Vitastor Network Public License 1.1
+
+// Permissions are based on:
+// 1. Users.
+//    Stored in /vitastor/config/user/<username>.
+//    Has 1 property:
+//    - groups, a list of group names the user is included in.
+// 2. Images.
+//    Stored in /vitastor/config/inode/<pool>/<inode>. Has the following properties:
+//    - owner (user name)
+//    - owner_group (group name)
+//    - reader_group
+// 3. Certificates.
+//    - osd_ca identifies OSDs.
+//    - admin_ca (optional) identifies administrators.
+//    - mon_ca (optional) identifies monitors.
+
+const { X509Certificate } = require('node:crypto');
+
+const static_perms = {
+    invalid: {
+        keys: {},
+        prefixes: {},
+    },
+    osd: {
+        keys: { '/pg/config': false },
+        prefixes: { '/config/': false, '/osd/': true, '/pg/state/': true, '/pg/history/': true, '/pgstats/': true },
+    },
+    mon: {
+        keys: { '/pg/config': true, '/stats': true, '/history/last_clean_pgs': true },
+        prefixes: {
+            '/config/': false, '/osd/': false, '/mon/': true, '/pg/history/': true,
+            '/pg/stats/': true, '/pgstats/': true, '/inode/stats/': true, '/pool/stats/': true,
+        },
+    },
+    admin: {
+        keys: { '/pg/config': true, '/stats': true, '/history/last_clean_pgs': true },
+        prefixes: {
+            '/config/': true, '/osd/': true, '/index/': true, '/pg/history/': true,
+            '/mon/': false, '/pg/': false, '/pgstats/': false, '/inode/stats/': false, '/pool/stats/': false,
+        },
+    },
+    client: {
+        keys: { '/config/global': false, '/config/node_placement': false, '/config/pools': false, '/pg/config': false },
+        prefixes: { '/osd/state/': false, '/pg/state/': false, '/index/maxid/': false },
+    },
+};
+
+const api_perms = {
+    osd: { lease_grant: true, lease_revoke: true, lease_keepalive: true, maintenance_status: true },
+    mon: { lease_grant: true, lease_revoke: true, lease_keepalive: true, maintenance_status: true },
+    admin: { maintenance_status: true },
+    client: { maintenance_status: true },
+};
+
+class VitastorAuthFilter
+{
+    constructor(antietcd)
+    {
+        this.cfg = antietcd.cfg;
+        this.antietcd = antietcd;
+        this.prefix = this.cfg.vitastor_prefix || '/vitastor';
+        this.prefix_parts = this.prefix.split('/');
+    }
+
+    async init()
+    {
+        if (!this.cfg.cert || !this.cfg.key || !this.cfg.ca || !this.cfg.osd_ca || !this.cfg.client_cert_auth)
+        {
+            throw new Error('Authenticated Vitastor setups require enabled client_cert_auth, cert, key'+
+                ' and separate ca (client CA), osd_ca and optionally admin_ca and mon_ca');
+        }
+        this.osd_ca = await this.antietcd.readPEM(this.cfg.osd_ca);
+        this.osd_ca_obj = new X509Certificate(this.osd_ca);
+        this.antietcd.tls.ca.push(this.osd_ca);
+        if (this.cfg.mon_ca)
+        {
+            this.mon_ca = await this.antietcd.readPEM(this.cfg.mon_ca);
+            this.mon_ca_obj = new X509Certificate(this.mon_ca);
+            this.antietcd.tls.ca.push(this.mon_ca);
+        }
+        if (this.cfg.admin_ca)
+        {
+            this.admin_ca = await this.antietcd.readPEM(this.cfg.admin_ca);
+            this.admin_ca_obj = new X509Certificate(this.admin_ca);
+            this.antietcd.tls.ca.push(this.admin_ca);
+        }
+    }
+
+    init_context(context, socket)
+    {
+        let cert = socket.getPeerX509Certificate();
+        if (cert.issuer == this.osd_ca_obj.subject && cert.verify(this.osd_ca_obj.publicKey))
+        {
+            context.user_type = 'osd';
+        }
+        else if (this.mon_ca_obj && cert.issuer == this.mon_ca_obj.subject && cert.verify(this.mon_ca_obj.publicKey))
+        {
+            context.user_type = 'mon';
+        }
+        else if (this.admin_ca_obj && cert.issuer == this.admin_ca_obj.subject && cert.verify(this.admin_ca_obj.publicKey))
+        {
+            context.user_type = 'admin';
+        }
+    }
+
+    _get(path, decode)
+    {
+        let cur = this.antietcd.etctree.state;
+        path = path instanceof Array ? path : path.split('/');
+        for (const p of path)
+        {
+            if (!cur.children)
+            {
+                return null;
+            }
+            cur = cur.children[p];
+            if (!cur)
+            {
+                return null;
+            }
+        }
+        if (decode)
+        {
+            return this._decode(path, cur.value);
+        }
+        return cur;
+    }
+
+    _decode(path, cur)
+    {
+        if (!cur)
+        {
+            return null;
+        }
+        if (cur)
+        {
+            try
+            {
+                cur = JSON.parse(cur);
+            }
+            catch (e)
+            {
+                console.warn('Invalid JSON in '+(path instanceof Array ? path.join('/') : path)+': '+e);
+            }
+        }
+        return cur;
+    }
+
+    // userInfo: { name: string, perms: static_perms[type], groups: { [string]: true } }
+    _check_compare(check, userInfo, checked)
+    {
+        let key = String(check.key);
+        if (key.substr(0, this.prefix.length) !== this.prefix)
+        {
+            return false;
+        }
+        key = key.substr(this.prefix.length);
+        if (key in userInfo.perms.keys)
+        {
+            return true;
+        }
+        for (const pfx in userInfo.perms.prefixes)
+        {
+            if (key.substr(0, pfx.length) == pfx)
+            {
+                return true;
+            }
+        }
+        if (userInfo.type == 'client')
+        {
+            // Image permissions
+            if (key.substr(0, 14) == '/config/inode/')
+            {
+                // Allowed to check that a key does not exist
+                if (check.target == 'VERSION' && check.version == 0)
+                {
+                    checked['M'+key] = true;
+                    return true;
+                }
+                else if (check.target == 'MOD')
+                {
+                    const data = this._get(check.key);
+                    if (!data || data.mod_revision != check.mod_revision)
+                    {
+                        // Break check to trigger CAS failure
+                        check.mod_revision = '18446744073709551615'; // UINT64_MAX
+                        return true;
+                    }
+                    const inode = this._decode(check.key, data.value);
+                    if (inode && (inode.owner_group && userInfo.groups[inode.owner_group] ||
+                        inode.owner === userInfo.name))
+                    {
+                        checked['M'+key] = true;
+                        return true;
+                    }
+                }
+                return false;
+            }
+            if (key.substr(0, 13) == '/index/image/')
+            {
+                // Allowed to check that a key does not exist
+                if (check.target == 'VERSION' && check.version == 0)
+                {
+                    checked['M'+key] = true;
+                    return true;
+                }
+                else if (check.target == 'MOD')
+                {
+                    let data = this._get(check.key);
+                    if (!data || data.mod_revision != check.mod_revision)
+                    {
+                        // Break check to trigger CAS failure
+                        check.mod_revision = '18446744073709551615'; // UINT64_MAX
+                        return true;
+                    }
+                    data = this._decode(check.key, data.value);
+                    if (data)
+                    {
+                        const inode = this._get([ ...this.prefix_parts, 'config', 'inode', data.pool_id, data.id ], true);
+                        if (inode && (inode.owner_group && userInfo.groups[inode.owner_group] ||
+                            inode.owner === userInfo.name))
+                        {
+                            checked['M'+key] = true;
+                            return true;
+                        }
+                    }
+                }
+                return false;
+            }
+            if (key.substr(0, 13) == '/index/maxid/')
+            {
+                const pool_id = key.substr(13);
+                const pool_cfg = this._get([ ...this.prefix_parts, 'config', 'pools' ], true);
+                if (!pool_cfg || !pool_cfg[pool_id] || !pool_cfg[pool_id].creator_group || !userInfo.groups[pool_cfg[pool_id].creator_group])
+                {
+                    return false;
+                }
+                if (check.target == 'VERSION' && check.version == 0)
+                {
+                    checked['I'+parseInt(key.substr(13))+'_0'] = true;
+                    return true;
+                }
+                else if (check.target == 'MOD')
+                {
+                    const data = this._get(check.key);
+                    if (!data || data.mod_revision != check.mod_revision)
+                    {
+                        // Break check to trigger CAS failure
+                        check.mod_revision = '18446744073709551615'; // UINT64_MAX
+                        return true;
+                    }
+                    checked['I'+parseInt(key.substr(13))+'_'+data.value] = true;
+                    return true;
+                }
+                return false;
+            }
+        }
+        return false;
+    }
+
+    _check_read(kv, userInfo)
+    {
+        let key = String(kv.key);
+        if (key.substr(0, this.prefix.length) !== this.prefix)
+        {
+            return false;
+        }
+        key = key.substr(this.prefix.length);
+        if (key in userInfo.perms.keys)
+        {
+            return true;
+        }
+        for (const pfx in userInfo.perms.prefixes)
+        {
+            if (key.substr(0, pfx.length) == pfx)
+            {
+                return true;
+            }
+        }
+        if (userInfo.type == 'client')
+        {
+            // Image permissions
+            if (key.substr(0, 14) == '/config/inode/')
+            {
+                const inode = this._decode(kv.key, kv.value);
+                if (inode && (inode.reader_group && userInfo.groups[inode.reader_group] ||
+                    inode.owner_group && userInfo.groups[inode.owner_group] ||
+                    inode.owner === userInfo.name))
+                {
+                    return true;
+                }
+                return false;
+            }
+            if (key.substr(0, 13) == '/index/image/')
+            {
+                const data = this._decode(kv.key, kv.value);
+                const inode = this._get([ ...this.prefix_parts, 'config', 'inode', data.pool_id, data.id ], true);
+                if (inode && (inode.reader_group && userInfo.groups[inode.reader_group] ||
+                    inode.owner_group && userInfo.groups[inode.owner_group] ||
+                    inode.owner === userInfo.name))
+                {
+                    return true;
+                }
+                return false;
+            }
+            if (key.substr(0, 13) == '/inode/stats/')
+            {
+                const [ pool_id, id ] = key.substr(13).split('/');
+                const inode = this._get([ ...this.prefix_parts, 'config', 'inode', pool_id, id ], true);
+                if (inode && (inode.reader_group && userInfo.groups[inode.reader_group] ||
+                    inode.owner_group && userInfo.groups[inode.owner_group] ||
+                    inode.owner === userInfo.name))
+                {
+                    return true;
+                }
+                return false;
+            }
+        }
+        return false;
+    }
+
+    _check_write(put, userInfo, checked)
+    {
+        let key = String(put.key);
+        if (key.substr(0, this.prefix.length) !== this.prefix)
+        {
+            return false;
+        }
+        key = key.substr(this.prefix.length);
+        if (userInfo.perms.keys[key])
+        {
+            return true;
+        }
+        for (const pfx in userInfo.perms.prefixes)
+        {
+            if (userInfo.perms.prefixes[pfx] && key.substr(0, pfx.length) == pfx)
+            {
+                return true;
+            }
+        }
+        if (checked && userInfo.type == 'client')
+        {
+            if (key.substr(0, 13) == '/index/maxid/' &&
+                checked['I'+parseInt(key.substr(13))+'_'+(put.value-1)])
+            {
+                // Allowed to increment maxid
+                return true;
+            }
+            if (checked['M'+key])
+            {
+                // Allowed to modify known images with CAS checks
+                return true;
+            }
+        }
+        return false;
+    }
+
+    _check_req(req, userInfo, checked)
+    {
+        let r;
+        if ((r = (req.request_range || req.requestRange)))
+        {
+            // All range queries are allowed, but responses are filtered - it's simpler
+        }
+        else if ((r = (req.request_put || req.requestPut)))
+        {
+            if (!this._check_write(r, userInfo, checked))
+                return false;
+        }
+        else if ((r = (req.request_delete_range || req.requestDeleteRange)))
+        {
+            if (!r.range_end || r.range_end === r.key)
+            {
+                if (!this._check_write({ key: r.key }, userInfo))
+                    return false;
+            }
+            else
+            {
+                // All keys in range must satisfy prefix
+                r.range_end = String(r.range_end);
+                if (r.key.length != r.range_end.length ||
+                    r.key[r.key.length-1] != '/' ||
+                    r.range_end[r.range_end.length-1] != '0')
+                {
+                    return false;
+                }
+                let key = r.key.substr(this.prefix.length);
+                let found = false;
+                for (const pfx in userInfo.perms.prefixes)
+                {
+                    if (userInfo.perms.prefixes[pfx] && key.substr(0, pfx.length) == pfx)
+                    {
+                        found = true;
+                        break;
+                    }
+                }
+                if (!found)
+                    return false;
+            }
+        }
+        return true;
+    }
+
+    _get_user(context)
+    {
+        if (context.user_type === 'osd' || context.user_type === 'mon' || context.user_type === 'admin')
+        {
+            return {
+                name: context.user_type,
+                type: context.user_type,
+                perms: static_perms[context.user_type],
+            };
+        }
+        if (!context.username)
+        {
+            return {};
+        }
+        let userInfo = this._get([ ...this.prefix_parts, 'config', 'user', context.username ], true);
+        if (!userInfo)
+        {
+            userInfo = {};
+        }
+        userInfo.perms = static_perms[userInfo.type] || static_perms['invalid'];
+        userInfo.name = context.username;
+        if (userInfo.groups instanceof Array)
+        {
+            userInfo.groups = userInfo.groups.reduce((a, c) => { a[c] = true; return a; }, {});
+        }
+        else
+        {
+            userInfo.groups = {};
+        }
+        return userInfo;
+    }
+
+    filter_api(context, api/*, data*/)
+    {
+        let type = 'client';
+        if (context.user_type === 'osd' || context.user_type === 'mon' || context.user_type === 'admin')
+        {
+            type = context.user_type;
+        }
+        return api_perms[type] && api_perms[type][api];
+    }
+
+    filter_txn(context, txn)
+    {
+        const userInfo = this._get_user(context);
+        if (!userInfo)
+        {
+            return null;
+        }
+        const checked = {};
+        if (txn.compare)
+        {
+            for (const check of txn.compare)
+            {
+                if (!this._check_compare(check, userInfo, checked))
+                    return null;
+            }
+        }
+        // Special transactions:
+        // 1. create image: create config/inode and index/image, increment index/maxid/<pool> (with CAS)
+        // 2. create snapshot: same as create image but also rename previous to @snap
+        if (txn.success)
+        {
+            for (const req of txn.success)
+            {
+                if (!this._check_req(req, userInfo, checked))
+                    return null;
+            }
+        }
+        if (txn.failure)
+        {
+            for (const req of txn.failure)
+            {
+                if (!this._check_req(req, userInfo, null))
+                    return null;
+            }
+        }
+        return txn;
+    }
+
+    filter_txn_response(context, txn, res)
+    {
+        if (!res.responses)
+        {
+            return;
+        }
+        const userInfo = this._get_user(context);
+        if (!userInfo)
+        {
+            for (const resp of res.responses)
+            {
+                if (resp.response_range && resp.response_range.kvs)
+                {
+                    resp.response_range.kvs = [];
+                }
+            }
+            return;
+        }
+        for (const resp of res.responses)
+        {
+            if (resp.response_range && resp.response_range.kvs)
+            {
+                resp.response_range.kvs = resp.response_range.kvs.filter(kv => this._check_read(kv, userInfo));
+            }
+        }
+    }
+
+    filter_watch_message(context, msg)
+    {
+        if (!msg.result || !msg.result.events)
+        {
+            return;
+        }
+        const userInfo = this._get_user(context);
+        if (!userInfo)
+        {
+            msg.result.events = [];
+            return;
+        }
+        msg.result.events = msg.result.events.filter(ev => this._check_read(ev.kv, userInfo));
+    }
+}
+
+module.exports = VitastorAuthFilter;

node-binding/package.json

@@ -1,6 +1,6 @@
 {
   "name": "vitastor",
-  "version": "3.0.5",
+  "version": "3.2.1",
   "description": "Low-level native bindings to Vitastor client library",
   "main": "index.js",
   "keywords": [

patches/VitastorPlugin.pm

@@ -366,15 +366,38 @@ sub map_volume
     my $prefix = defined $scfg->{vitastor_prefix} ? $scfg->{vitastor_prefix} : 'pve/';
 
     my ($vtype, $img_name, $vmid) = $class->parse_volname($volname);
-    my $name = $img_name;
+    my $name = $prefix.$img_name;
     $name .= '@'.$snapname if $snapname;
 
     my $mapped = run_cli($scfg, [ 'ls' ], binary => '/usr/bin/vitastor-nbd');
-    my ($kerneldev) = grep { $mapped->{$_}->{image} eq $prefix.$name } keys %$mapped;
-    return $kerneldev if $kerneldev && -b $kerneldev; # already mapped
+    my ($kerneldev) = grep {
+        $mapped->{$_} && $mapped->{$_}->{image} && $mapped->{$_}->{image} eq $name
+    } keys %$mapped;
 
-    $kerneldev = run_cli($scfg, [ 'map', '--image', $prefix.$name ], binary => '/usr/bin/vitastor-nbd', json => 0);
-    return $kerneldev;
+    if ($kerneldev && -b $kerneldev)
+    {
+        my $size = `/usr/sbin/blockdev --getsize64 $kerneldev`;
+        return $kerneldev if $size && $size > 0;
+    }
+
+    my $map_out = run_cli($scfg, [ 'map', '--image', $name ], binary => '/usr/bin/vitastor-nbd', json => 0);
+    $map_out =~ s/^\s+|\s+$//gso;
+
+    # Wait until the device is started
+    for (my $i = 0; $i < 100; $i++)
+    {
+        $mapped = run_cli($scfg, [ 'ls' ], binary => '/usr/bin/vitastor-nbd');
+        ($kerneldev) = grep { $mapped->{$_} && $mapped->{$_}->{image} && $mapped->{$_}->{image} eq $name } keys %$mapped;
+        if ($kerneldev && -b $kerneldev)
+        {
+            my $size = `/usr/sbin/blockdev --getsize64 $kerneldev`;
+            return $kerneldev if $size && $size > 0;
+        }
+        select(undef, undef, undef, 0.1);
+    }
+
+    die "Failed to map Vitastor image $name via NBD".
+        ($map_out ? ", vitastor-nbd map returned '$map_out'" : "")."\n";
 }
 
 sub unmap_volume
@@ -383,13 +406,19 @@ sub unmap_volume
     my $prefix = defined $scfg->{vitastor_prefix} ? $scfg->{vitastor_prefix} : 'pve/';
 
     my ($vtype, $name, $vmid) = $class->parse_volname($volname);
+    $name = $prefix.$name;
     $name .= '@'.$snapname if $snapname;
-
     my $mapped = run_cli($scfg, [ 'ls' ], binary => '/usr/bin/vitastor-nbd');
-    my ($kerneldev) = grep { $mapped->{$_}->{image} eq $prefix.$name } keys %$mapped;
-    if ($kerneldev && -b $kerneldev)
+
+    my @kerneldevs = grep {
+        $mapped->{$_} && $mapped->{$_}->{image} && $mapped->{$_}->{image} eq $name
+    } keys %$mapped;
+
+    for my $kerneldev (@kerneldevs)
     {
-        run_cli($scfg, [ 'unmap', $kerneldev ], binary => '/usr/bin/vitastor-nbd', json => 0);
+        next if !$kerneldev || !-b $kerneldev;
+        eval { run_cli($scfg, [ 'unmap', $kerneldev ], binary => '/usr/bin/vitastor-nbd', json => 0); };
+        warn "Failed to unmap Vitastor image $name from $kerneldev: $@" if $@;
     }
 
     return 1;
@@ -405,7 +434,13 @@ sub activate_volume
 sub deactivate_volume
 {
     my ($class, $storeid, $scfg, $volname, $snapname, $cache) = @_;
-    $class->unmap_volume($storeid, $scfg, $volname, $snapname) if $scfg->{vitastor_nbd};
+
+    # Even with vitastor_nbd=0, Proxmox may call map_volume() for special
+    # volumes like tpmstate0 because swtpm needs a local file/block path.
+    # Therefore, always try to unmap an existing NBD mapping here.
+    # unmap_volume() is a no-op if the volume is not currently mapped.
+    $class->unmap_volume($storeid, $scfg, $volname, $snapname);
+
     return 1;
 }
 

patches/cinder-vitastor.py

@@ -50,7 +50,7 @@ from cinder.volume import configuration
 from cinder.volume import driver
 from cinder.volume import volume_utils
 
-VITASTOR_VERSION = '3.0.5'
+VITASTOR_VERSION = '3.2.1'
 
 LOG = logging.getLogger(__name__)
 
@@ -608,7 +608,7 @@ class VitastorDriver(driver.CloneableImageVD,
         """Extend an existing volume."""
         vol_name = utils.convert_str(volume.name)
         size = int(new_size) * units.Gi
-        self._cli('extend volume', 'modify', vol_name, '--resize', new_size)
+        self._cli('extend volume', 'modify', vol_name, '--resize', size)
         LOG.debug(
             "Extend volume from %(old_size)s GB to %(new_size)s GB.",
             {'old_size': volume.size, 'new_size': new_size}

patches/libvirt-11.10-vitastor.patch

@@ -0,0 +1,699 @@
+From 560382fdf86fdbbd08c38187ef602c04e0abece0 Mon Sep 17 00:00:00 2001
+From: Vitaliy Filippov <vitalif@yourcmc.ru>
+Date: Sat, 5 Sep 2026 20:41:38 +0300
+Subject: [PATCH] Add Vitastor support
+
+---
+ include/libvirt/libvirt-storage.h             |   1 +
+ src/conf/domain_conf.c                        |   4 +-
+ src/conf/domain_validate.c                    |  11 +-
+ src/conf/schemas/domaincommon.rng             |  30 +++++
+ src/conf/storage_conf.c                       |  20 ++-
+ src/conf/storage_conf.h                       |   2 +
+ src/conf/storage_source_conf.c                |   2 +
+ src/conf/storage_source_conf.h                |   1 +
+ src/conf/virstorageobj.c                      |   3 +
+ src/libvirt-storage.c                         |   1 +
+ src/libxl/libxl_conf.c                        |   1 +
+ src/libxl/xen_xl.c                            |   1 +
+ src/qemu/qemu_block.c                         |  45 +++++++
+ src/qemu/qemu_domain.c                        |   5 +-
+ src/qemu/qemu_nbdkit.c                        |   2 +
+ src/qemu/qemu_snapshot.c                      |   2 +
+ src/storage/storage_driver.c                  |   1 +
+ .../storage_source_backingstore.c             | 123 ++++++++++++++++++
+ src/test/test_driver.c                        |   1 +
+ .../storagepoolcapsschemadata/poolcaps-fs.xml |   7 +
+ .../poolcaps-full.xml                         |   7 +
+ tests/storagepoolxml2argvtest.c               |   1 +
+ tools/virsh-pool.c                            |   3 +
+ 23 files changed, 268 insertions(+), 6 deletions(-)
+
+diff --git a/include/libvirt/libvirt-storage.h b/include/libvirt/libvirt-storage.h
+index aaad4a3da1..5f5daa8341 100644
+--- a/include/libvirt/libvirt-storage.h
++++ b/include/libvirt/libvirt-storage.h
+@@ -326,6 +326,7 @@ typedef enum {
+     VIR_CONNECT_LIST_STORAGE_POOLS_ZFS           = 1 << 17, /* (Since: 1.2.8) */
+     VIR_CONNECT_LIST_STORAGE_POOLS_VSTORAGE      = 1 << 18, /* (Since: 3.1.0) */
+     VIR_CONNECT_LIST_STORAGE_POOLS_ISCSI_DIRECT  = 1 << 19, /* (Since: 5.6.0) */
++    VIR_CONNECT_LIST_STORAGE_POOLS_VITASTOR      = 1 << 20, /* (Since: 5.0.0) */
+ } virConnectListAllStoragePoolsFlags;
+ 
+ int                     virConnectListAllStoragePools(virConnectPtr conn,
+diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
+index 541dad5bdc..5cb94e1fed 100644
+--- a/src/conf/domain_conf.c
++++ b/src/conf/domain_conf.c
+@@ -7453,7 +7453,8 @@ virDomainDiskSourceNetworkParse(xmlNodePtr node,
+     src->configFile = virXPathString("string(./config/@file)", ctxt);
+ 
+     if (src->protocol == VIR_STORAGE_NET_PROTOCOL_HTTP ||
+-        src->protocol == VIR_STORAGE_NET_PROTOCOL_HTTPS)
++        src->protocol == VIR_STORAGE_NET_PROTOCOL_HTTPS ||
++        src->protocol == VIR_STORAGE_NET_PROTOCOL_VITASTOR)
+         src->query = virXMLPropString(node, "query");
+ 
+     if (virDomainStorageNetworkParseHosts(node, ctxt, &src->hosts, &src->nhosts) < 0)
+@@ -32196,6 +32197,7 @@ virDomainStorageSourceTranslateSourcePool(virStorageSource *src,
+ 
+     case VIR_STORAGE_POOL_MPATH:
+     case VIR_STORAGE_POOL_RBD:
++    case VIR_STORAGE_POOL_VITASTOR:
+     case VIR_STORAGE_POOL_SHEEPDOG:
+     case VIR_STORAGE_POOL_GLUSTER:
+     case VIR_STORAGE_POOL_LAST:
+diff --git a/src/conf/domain_validate.c b/src/conf/domain_validate.c
+index 4558e7b210..3c6b2a8ee8 100644
+--- a/src/conf/domain_validate.c
++++ b/src/conf/domain_validate.c
+@@ -520,6 +520,7 @@ virDomainDiskDefValidateSourceChainOne(const virStorageSource *src)
+         case VIR_STORAGE_NET_PROTOCOL_RBD:
+             break;
+ 
++        case VIR_STORAGE_NET_PROTOCOL_VITASTOR:
+         case VIR_STORAGE_NET_PROTOCOL_NBD:
+         case VIR_STORAGE_NET_PROTOCOL_SHEEPDOG:
+         case VIR_STORAGE_NET_PROTOCOL_GLUSTER:
+@@ -592,7 +593,7 @@ virDomainDiskDefValidateSourceChainOne(const virStorageSource *src)
+         }
+     }
+ 
+-    /* internal snapshots and config files are currently supported only with rbd: */
++    /* internal snapshots are currently supported only with rbd: */
+     if (virStorageSourceGetActualType(src) != VIR_STORAGE_TYPE_NETWORK &&
+         src->protocol != VIR_STORAGE_NET_PROTOCOL_RBD) {
+         if (src->snapshot) {
+@@ -600,10 +601,14 @@ virDomainDiskDefValidateSourceChainOne(const virStorageSource *src)
+                            _("<snapshot> element is currently supported only with 'rbd' disks"));
+             return -1;
+         }
+-
++    }
++    /* config files are currently supported only with rbd and vitastor: */
++    if (virStorageSourceGetActualType(src) != VIR_STORAGE_TYPE_NETWORK &&
++        src->protocol != VIR_STORAGE_NET_PROTOCOL_RBD &&
++        src->protocol != VIR_STORAGE_NET_PROTOCOL_VITASTOR) {
+         if (src->configFile) {
+             virReportError(VIR_ERR_XML_ERROR, "%s",
+-                           _("<config> element is currently supported only with 'rbd' disks"));
++                           _("<config> element is currently supported only with 'rbd' and 'vitastor' disks"));
+             return -1;
+         }
+     }
+diff --git a/src/conf/schemas/domaincommon.rng b/src/conf/schemas/domaincommon.rng
+index 1f9ac102a0..51b55ea72b 100644
+--- a/src/conf/schemas/domaincommon.rng
++++ b/src/conf/schemas/domaincommon.rng
+@@ -2092,6 +2092,35 @@
+     </element>
+   </define>
+ 
++  <define name="diskSourceNetworkProtocolVitastor">
++    <element name="source">
++      <interleave>
++        <attribute name="protocol">
++          <value>vitastor</value>
++        </attribute>
++        <ref name="diskSourceCommon"/>
++        <optional>
++          <attribute name="name"/>
++        </optional>
++        <optional>
++          <attribute name="query"/>
++        </optional>
++        <zeroOrMore>
++          <ref name="diskSourceNetworkHost"/>
++        </zeroOrMore>
++        <optional>
++          <element name="config">
++            <attribute name="file">
++              <ref name="absFilePath"/>
++            </attribute>
++            <empty/>
++          </element>
++        </optional>
++        <empty/>
++      </interleave>
++    </element>
++  </define>
++
+   <define name="diskSourceNetworkProtocolISCSI">
+     <element name="source">
+       <attribute name="protocol">
+@@ -2442,6 +2471,7 @@
+       <ref name="diskSourceNetworkProtocolSimple"/>
+       <ref name="diskSourceNetworkProtocolVxHS"/>
+       <ref name="diskSourceNetworkProtocolNFS"/>
++      <ref name="diskSourceNetworkProtocolVitastor"/>
+     </choice>
+   </define>
+ 
+diff --git a/src/conf/storage_conf.c b/src/conf/storage_conf.c
+index 1dc9365bf2..a8a736be81 100644
+--- a/src/conf/storage_conf.c
++++ b/src/conf/storage_conf.c
+@@ -56,7 +56,7 @@ VIR_ENUM_IMPL(virStoragePool,
+               "logical", "disk", "iscsi",
+               "iscsi-direct", "scsi", "mpath",
+               "rbd", "sheepdog", "gluster",
+-              "zfs", "vstorage",
++              "zfs", "vstorage", "vitastor",
+ );
+ 
+ VIR_ENUM_IMPL(virStoragePoolFormatFileSystem,
+@@ -242,6 +242,18 @@ static virStoragePoolTypeInfo poolTypeInfo[] = {
+           .formatToString = virStorageFileFormatTypeToString,
+       }
+     },
++    {.poolType = VIR_STORAGE_POOL_VITASTOR,
++     .poolOptions = {
++         .flags = (VIR_STORAGE_POOL_SOURCE_HOST |
++                   VIR_STORAGE_POOL_SOURCE_NETWORK |
++                   VIR_STORAGE_POOL_SOURCE_NAME),
++      },
++      .volOptions = {
++          .defaultFormat = VIR_STORAGE_FILE_RAW,
++          .formatFromString = virStorageVolumeFormatFromString,
++          .formatToString = virStorageFileFormatTypeToString,
++      }
++    },
+     {.poolType = VIR_STORAGE_POOL_SHEEPDOG,
+      .poolOptions = {
+          .flags = (VIR_STORAGE_POOL_SOURCE_HOST |
+@@ -538,6 +550,11 @@ virStoragePoolDefParseSource(xmlXPathContextPtr ctxt,
+                        _("element 'name' is mandatory for RBD pool"));
+         return -1;
+     }
++    if (pool_type == VIR_STORAGE_POOL_VITASTOR && source->name == NULL) {
++        virReportError(VIR_ERR_XML_ERROR, "%s",
++                       _("element 'name' is mandatory for Vitastor pool"));
++        return -1;
++    }
+ 
+     if (options->formatFromString) {
+         g_autofree char *format = NULL;
+@@ -1127,6 +1144,7 @@ virStoragePoolDefFormatBuf(virBuffer *buf,
+     /* RBD, Sheepdog, Gluster and Iscsi-direct devices are not local block devs nor
+      * files, so they don't have a target */
+     if (def->type != VIR_STORAGE_POOL_RBD &&
++        def->type != VIR_STORAGE_POOL_VITASTOR &&
+         def->type != VIR_STORAGE_POOL_SHEEPDOG &&
+         def->type != VIR_STORAGE_POOL_GLUSTER &&
+         def->type != VIR_STORAGE_POOL_ISCSI_DIRECT) {
+diff --git a/src/conf/storage_conf.h b/src/conf/storage_conf.h
+index fc67957cfe..720c07ef74 100644
+--- a/src/conf/storage_conf.h
++++ b/src/conf/storage_conf.h
+@@ -103,6 +103,7 @@ typedef enum {
+     VIR_STORAGE_POOL_GLUSTER,  /* Gluster device */
+     VIR_STORAGE_POOL_ZFS,      /* ZFS */
+     VIR_STORAGE_POOL_VSTORAGE, /* Virtuozzo Storage */
++    VIR_STORAGE_POOL_VITASTOR, /* Vitastor */
+ 
+     VIR_STORAGE_POOL_LAST,
+ } virStoragePoolType;
+@@ -454,6 +455,7 @@ VIR_ENUM_DECL(virStoragePartedFs);
+                  VIR_CONNECT_LIST_STORAGE_POOLS_SCSI     | \
+                  VIR_CONNECT_LIST_STORAGE_POOLS_MPATH    | \
+                  VIR_CONNECT_LIST_STORAGE_POOLS_RBD      | \
++                 VIR_CONNECT_LIST_STORAGE_POOLS_VITASTOR | \
+                  VIR_CONNECT_LIST_STORAGE_POOLS_SHEEPDOG | \
+                  VIR_CONNECT_LIST_STORAGE_POOLS_GLUSTER  | \
+                  VIR_CONNECT_LIST_STORAGE_POOLS_ZFS      | \
+diff --git a/src/conf/storage_source_conf.c b/src/conf/storage_source_conf.c
+index 087de1eaf2..acc046816b 100644
+--- a/src/conf/storage_source_conf.c
++++ b/src/conf/storage_source_conf.c
+@@ -89,6 +89,7 @@ VIR_ENUM_IMPL(virStorageNetProtocol,
+               "ssh",
+               "vxhs",
+               "nfs",
++              "vitastor",
+ );
+ 
+ 
+@@ -1313,6 +1314,7 @@ virStorageSourceNetworkDefaultPort(virStorageNetProtocol protocol)
+         case VIR_STORAGE_NET_PROTOCOL_GLUSTER:
+             return 24007;
+ 
++        case VIR_STORAGE_NET_PROTOCOL_VITASTOR:
+         case VIR_STORAGE_NET_PROTOCOL_RBD:
+             /* we don't provide a default for RBD */
+             return 0;
+diff --git a/src/conf/storage_source_conf.h b/src/conf/storage_source_conf.h
+index fc868b31af..1c9fbc02b9 100644
+--- a/src/conf/storage_source_conf.h
++++ b/src/conf/storage_source_conf.h
+@@ -130,6 +130,7 @@ typedef enum {
+     VIR_STORAGE_NET_PROTOCOL_SSH,
+     VIR_STORAGE_NET_PROTOCOL_VXHS,
+     VIR_STORAGE_NET_PROTOCOL_NFS,
++    VIR_STORAGE_NET_PROTOCOL_VITASTOR,
+ 
+     VIR_STORAGE_NET_PROTOCOL_LAST
+ } virStorageNetProtocol;
+diff --git a/src/conf/virstorageobj.c b/src/conf/virstorageobj.c
+index 59fa5da372..4739167f5f 100644
+--- a/src/conf/virstorageobj.c
++++ b/src/conf/virstorageobj.c
+@@ -1438,6 +1438,7 @@ virStoragePoolObjSourceFindDuplicateCb(const void *payload,
+             return 1;
+         break;
+ 
++    case VIR_STORAGE_POOL_VITASTOR:
+     case VIR_STORAGE_POOL_ISCSI_DIRECT:
+     case VIR_STORAGE_POOL_RBD:
+     case VIR_STORAGE_POOL_LAST:
+@@ -1921,6 +1922,8 @@ virStoragePoolObjMatch(virStoragePoolObj *obj,
+                (obj->def->type == VIR_STORAGE_POOL_MPATH))   ||
+               (MATCH(VIR_CONNECT_LIST_STORAGE_POOLS_RBD) &&
+                (obj->def->type == VIR_STORAGE_POOL_RBD))     ||
++              (MATCH(VIR_CONNECT_LIST_STORAGE_POOLS_VITASTOR) &&
++               (obj->def->type == VIR_STORAGE_POOL_VITASTOR)) ||
+               (MATCH(VIR_CONNECT_LIST_STORAGE_POOLS_SHEEPDOG) &&
+                (obj->def->type == VIR_STORAGE_POOL_SHEEPDOG)) ||
+               (MATCH(VIR_CONNECT_LIST_STORAGE_POOLS_GLUSTER) &&
+diff --git a/src/libvirt-storage.c b/src/libvirt-storage.c
+index db7660aac4..561df34709 100644
+--- a/src/libvirt-storage.c
++++ b/src/libvirt-storage.c
+@@ -94,6 +94,7 @@ virStoragePoolGetConnect(virStoragePoolPtr pool)
+  * VIR_CONNECT_LIST_STORAGE_POOLS_SCSI
+  * VIR_CONNECT_LIST_STORAGE_POOLS_MPATH
+  * VIR_CONNECT_LIST_STORAGE_POOLS_RBD
++ * VIR_CONNECT_LIST_STORAGE_POOLS_VITASTOR
+  * VIR_CONNECT_LIST_STORAGE_POOLS_SHEEPDOG
+  * VIR_CONNECT_LIST_STORAGE_POOLS_GLUSTER
+  * VIR_CONNECT_LIST_STORAGE_POOLS_ZFS
+diff --git a/src/libxl/libxl_conf.c b/src/libxl/libxl_conf.c
+index 2b988157fa..9d0eb47b25 100644
+--- a/src/libxl/libxl_conf.c
++++ b/src/libxl/libxl_conf.c
+@@ -1069,6 +1069,7 @@ libxlMakeNetworkDiskSrcStr(virStorageSource *src,
+     case VIR_STORAGE_NET_PROTOCOL_SSH:
+     case VIR_STORAGE_NET_PROTOCOL_VXHS:
+     case VIR_STORAGE_NET_PROTOCOL_NFS:
++    case VIR_STORAGE_NET_PROTOCOL_VITASTOR:
+     case VIR_STORAGE_NET_PROTOCOL_LAST:
+     case VIR_STORAGE_NET_PROTOCOL_NONE:
+         virReportError(VIR_ERR_NO_SUPPORT,
+diff --git a/src/libxl/xen_xl.c b/src/libxl/xen_xl.c
+index b2ff0edcf2..5d9f50c88c 100644
+--- a/src/libxl/xen_xl.c
++++ b/src/libxl/xen_xl.c
+@@ -1461,6 +1461,7 @@ xenFormatXLDiskSrcNet(virStorageSource *src)
+     case VIR_STORAGE_NET_PROTOCOL_SSH:
+     case VIR_STORAGE_NET_PROTOCOL_VXHS:
+     case VIR_STORAGE_NET_PROTOCOL_NFS:
++    case VIR_STORAGE_NET_PROTOCOL_VITASTOR:
+     case VIR_STORAGE_NET_PROTOCOL_LAST:
+     case VIR_STORAGE_NET_PROTOCOL_NONE:
+         virReportError(VIR_ERR_NO_SUPPORT,
+diff --git a/src/qemu/qemu_block.c b/src/qemu/qemu_block.c
+index a7062d3e96..4f2b6cc0e6 100644
+--- a/src/qemu/qemu_block.c
++++ b/src/qemu/qemu_block.c
+@@ -743,6 +743,38 @@ qemuBlockStorageSourceGetRBDProps(virStorageSource *src,
+ }
+ 
+ 
++static virJSONValue *
++qemuBlockStorageSourceGetVitastorProps(virStorageSource *src)
++{
++    virJSONValue *ret = NULL;
++    virStorageNetHostDef *host;
++    size_t i;
++    g_auto(virBuffer) buf = VIR_BUFFER_INITIALIZER;
++    g_autofree char *etcd = NULL;
++
++    for (i = 0; i < src->nhosts; i++) {
++        host = src->hosts + i;
++        if ((virStorageNetHostTransport)host->transport != VIR_STORAGE_NET_HOST_TRANS_TCP) {
++            return NULL;
++        }
++        virBufferAsprintf(&buf, i > 0 ? ",%s:%u" : "%s:%u", host->name, host->port);
++    }
++    if (src->nhosts > 0) {
++        etcd = virBufferContentAndReset(&buf);
++    }
++
++    if (virJSONValueObjectAdd(&ret,
++                              "S:etcd-host", etcd,
++                              "S:etcd-prefix", src->query,
++                              "S:config-path", src->configFile,
++                              "s:image", src->path,
++                              NULL) < 0)
++        return NULL;
++
++    return ret;
++}
++
++
+ static virJSONValue *
+ qemuBlockStorageSourceGetSshProps(virStorageSource *src)
+ {
+@@ -1093,6 +1125,12 @@ qemuBlockStorageSourceGetBackendProps(virStorageSource *src,
+                 return NULL;
+             break;
+ 
++        case VIR_STORAGE_NET_PROTOCOL_VITASTOR:
++            driver = "vitastor";
++            if (!(fileprops = qemuBlockStorageSourceGetVitastorProps(src)))
++                return NULL;
++            break;
++
+         case VIR_STORAGE_NET_PROTOCOL_SSH:
+             driver = "ssh";
+             if (!(fileprops = qemuBlockStorageSourceGetSshProps(src)))
+@@ -1996,6 +2034,7 @@ qemuBlockGetBackingStoreString(virStorageSource *src,
+ 
+             case VIR_STORAGE_NET_PROTOCOL_SHEEPDOG:
+             case VIR_STORAGE_NET_PROTOCOL_RBD:
++            case VIR_STORAGE_NET_PROTOCOL_VITASTOR:
+             case VIR_STORAGE_NET_PROTOCOL_VXHS:
+             case VIR_STORAGE_NET_PROTOCOL_NFS:
+             case VIR_STORAGE_NET_PROTOCOL_SSH:
+@@ -2376,6 +2415,12 @@ qemuBlockStorageSourceCreateGetStorageProps(virStorageSource *src,
+                 return -1;
+             break;
+ 
++        case VIR_STORAGE_NET_PROTOCOL_VITASTOR:
++            driver = "vitastor";
++            if (!(location = qemuBlockStorageSourceGetVitastorProps(src)))
++                return -1;
++            break;
++
+         case VIR_STORAGE_NET_PROTOCOL_SSH:
+             if (srcPriv->nbdkitProcess) {
+                 /* disk creation not yet supported with nbdkit, and even if it
+diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
+index ac56fc7cb4..b80b311eea 100644
+--- a/src/qemu/qemu_domain.c
++++ b/src/qemu/qemu_domain.c
+@@ -4677,7 +4677,8 @@ qemuDomainValidateStorageSource(virStorageSource *src,
+     if (src->query &&
+         (actualType != VIR_STORAGE_TYPE_NETWORK ||
+          (src->protocol != VIR_STORAGE_NET_PROTOCOL_HTTPS &&
+-          src->protocol != VIR_STORAGE_NET_PROTOCOL_HTTP))) {
++          src->protocol != VIR_STORAGE_NET_PROTOCOL_HTTP &&
++          src->protocol != VIR_STORAGE_NET_PROTOCOL_VITASTOR))) {
+         virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
+                        _("query is supported only with HTTP(S) protocols"));
+         return -1;
+@@ -4693,6 +4694,7 @@ qemuDomainValidateStorageSource(virStorageSource *src,
+         case VIR_STORAGE_NET_PROTOCOL_ISCSI:
+         case VIR_STORAGE_NET_PROTOCOL_NBD:
+         case VIR_STORAGE_NET_PROTOCOL_RBD:
++        case VIR_STORAGE_NET_PROTOCOL_VITASTOR:
+         case VIR_STORAGE_NET_PROTOCOL_SSH:
+         case VIR_STORAGE_NET_PROTOCOL_SHEEPDOG:
+             break;
+@@ -9103,6 +9105,7 @@ qemuDomainPrepareStorageSourceTLS(virStorageSource *src,
+         break;
+ 
+     case VIR_STORAGE_NET_PROTOCOL_RBD:
++    case VIR_STORAGE_NET_PROTOCOL_VITASTOR:
+     case VIR_STORAGE_NET_PROTOCOL_SHEEPDOG:
+     case VIR_STORAGE_NET_PROTOCOL_GLUSTER:
+     case VIR_STORAGE_NET_PROTOCOL_ISCSI:
+diff --git a/src/qemu/qemu_nbdkit.c b/src/qemu/qemu_nbdkit.c
+index c1bc6bc363..9d3433bf75 100644
+--- a/src/qemu/qemu_nbdkit.c
++++ b/src/qemu/qemu_nbdkit.c
+@@ -869,6 +869,7 @@ qemuNbdkitInitStorageSource(qemuNbdkitCaps *caps WITHOUT_NBDKIT_UNUSED,
+         case VIR_STORAGE_NET_PROTOCOL_NONE:
+         case VIR_STORAGE_NET_PROTOCOL_NBD:
+         case VIR_STORAGE_NET_PROTOCOL_RBD:
++        case VIR_STORAGE_NET_PROTOCOL_VITASTOR:
+         case VIR_STORAGE_NET_PROTOCOL_SHEEPDOG:
+         case VIR_STORAGE_NET_PROTOCOL_GLUSTER:
+         case VIR_STORAGE_NET_PROTOCOL_ISCSI:
+@@ -1133,6 +1134,7 @@ qemuNbdkitProcessBuildCommand(qemuNbdkitProcess *proc)
+         case VIR_STORAGE_NET_PROTOCOL_NONE:
+         case VIR_STORAGE_NET_PROTOCOL_NBD:
+         case VIR_STORAGE_NET_PROTOCOL_RBD:
++        case VIR_STORAGE_NET_PROTOCOL_VITASTOR:
+         case VIR_STORAGE_NET_PROTOCOL_SHEEPDOG:
+         case VIR_STORAGE_NET_PROTOCOL_GLUSTER:
+         case VIR_STORAGE_NET_PROTOCOL_ISCSI:
+diff --git a/src/qemu/qemu_snapshot.c b/src/qemu/qemu_snapshot.c
+index 302775af92..9d8fa0ded2 100644
+--- a/src/qemu/qemu_snapshot.c
++++ b/src/qemu/qemu_snapshot.c
+@@ -665,6 +665,7 @@ qemuSnapshotPrepareDiskExternalInactive(virDomainSnapshotDiskDef *snapdisk,
+         case VIR_STORAGE_NET_PROTOCOL_NONE:
+         case VIR_STORAGE_NET_PROTOCOL_NBD:
+         case VIR_STORAGE_NET_PROTOCOL_RBD:
++        case VIR_STORAGE_NET_PROTOCOL_VITASTOR:
+         case VIR_STORAGE_NET_PROTOCOL_SHEEPDOG:
+         case VIR_STORAGE_NET_PROTOCOL_GLUSTER:
+         case VIR_STORAGE_NET_PROTOCOL_ISCSI:
+@@ -890,6 +891,7 @@ qemuSnapshotPrepareDiskInternal(virDomainDiskDef *disk,
+         case VIR_STORAGE_NET_PROTOCOL_NONE:
+         case VIR_STORAGE_NET_PROTOCOL_NBD:
+         case VIR_STORAGE_NET_PROTOCOL_RBD:
++        case VIR_STORAGE_NET_PROTOCOL_VITASTOR:
+         case VIR_STORAGE_NET_PROTOCOL_SHEEPDOG:
+         case VIR_STORAGE_NET_PROTOCOL_GLUSTER:
+         case VIR_STORAGE_NET_PROTOCOL_ISCSI:
+diff --git a/src/storage/storage_driver.c b/src/storage/storage_driver.c
+index e19e032427..59f91f4710 100644
+--- a/src/storage/storage_driver.c
++++ b/src/storage/storage_driver.c
+@@ -1626,6 +1626,7 @@ storageVolLookupByPathCallback(virStoragePoolObj *obj,
+ 
+         case VIR_STORAGE_POOL_GLUSTER:
+         case VIR_STORAGE_POOL_RBD:
++        case VIR_STORAGE_POOL_VITASTOR:
+         case VIR_STORAGE_POOL_SHEEPDOG:
+         case VIR_STORAGE_POOL_ZFS:
+         case VIR_STORAGE_POOL_LAST:
+diff --git a/src/storage_file/storage_source_backingstore.c b/src/storage_file/storage_source_backingstore.c
+index 821378883c..2211f6891b 100644
+--- a/src/storage_file/storage_source_backingstore.c
++++ b/src/storage_file/storage_source_backingstore.c
+@@ -264,6 +264,75 @@ virStorageSourceParseRBDColonString(const char *rbdstr,
+ }
+ 
+ 
++static int
++virStorageSourceParseVitastorColonString(const char *colonstr,
++                                         virStorageSource *src)
++{
++    char *p, *e, *next;
++    g_autofree char *options = NULL;
++
++    /* optionally skip the "vitastor:" prefix if provided */
++    if (STRPREFIX(colonstr, "vitastor:"))
++        colonstr += strlen("vitastor:");
++
++    options = g_strdup(colonstr);
++
++    p = options;
++    while (*p) {
++        /* find : delimiter or end of string */
++        for (e = p; *e && *e != ':'; ++e) {
++            if (*e == '\\') {
++                e++;
++                if (*e == '\0')
++                    break;
++            }
++        }
++        if (*e == '\0') {
++            next = e;    /* last kv pair */
++        } else {
++            next = e + 1;
++            *e = '\0';
++        }
++
++        if (STRPREFIX(p, "image=")) {
++            src->path = g_strdup(p + strlen("image="));
++        } else if (STRPREFIX(p, "etcd-prefix=")) {
++            src->query = g_strdup(p + strlen("etcd-prefix="));
++        } else if (STRPREFIX(p, "config-path=")) {
++            src->configFile = g_strdup(p + strlen("config-path="));
++        } else if (STRPREFIX(p, "etcd-host=")) {
++            char *h, *sep;
++
++            h = p + strlen("etcd-host=");
++            while (h < e) {
++                for (sep = h; sep < e; ++sep) {
++                    if (*sep == '\\' && (sep[1] == ',' ||
++                                         sep[1] == ';' ||
++                                         sep[1] == ' ')) {
++                        *sep = '\0';
++                        sep += 2;
++                        break;
++                    }
++                }
++
++                if (virStorageSourceRBDAddHost(src, h) < 0)
++                    return -1;
++
++                h = sep;
++            }
++        }
++
++        p = next;
++    }
++
++    if (!src->path) {
++        return -1;
++    }
++
++    return 0;
++}
++
++
+ static int
+ virStorageSourceParseNBDColonString(const char *nbdstr,
+                                     virStorageSource *src)
+@@ -379,6 +448,11 @@ virStorageSourceParseBackingColon(virStorageSource *src,
+             return -1;
+         break;
+ 
++    case VIR_STORAGE_NET_PROTOCOL_VITASTOR:
++        if (virStorageSourceParseVitastorColonString(path, src) < 0)
++            return -1;
++        break;
++
+     case VIR_STORAGE_NET_PROTOCOL_SHEEPDOG:
+     case VIR_STORAGE_NET_PROTOCOL_LAST:
+     case VIR_STORAGE_NET_PROTOCOL_NONE:
+@@ -953,6 +1027,54 @@ virStorageSourceParseBackingJSONRBD(virStorageSource *src,
+     return 0;
+ }
+ 
++static int
++virStorageSourceParseBackingJSONVitastor(virStorageSource *src,
++                                         virJSONValue *json,
++                                         const char *jsonstr G_GNUC_UNUSED,
++                                         int opaque G_GNUC_UNUSED)
++{
++    const char *filename;
++    const char *image = virJSONValueObjectGetString(json, "image");
++    const char *conf = virJSONValueObjectGetString(json, "config-path");
++    const char *etcd_prefix = virJSONValueObjectGetString(json, "etcd-prefix");
++    virJSONValue *servers = virJSONValueObjectGetArray(json, "server");
++    size_t nservers;
++    size_t i;
++
++    src->type = VIR_STORAGE_TYPE_NETWORK;
++    src->protocol = VIR_STORAGE_NET_PROTOCOL_VITASTOR;
++
++    /* legacy syntax passed via 'filename' option */
++    if ((filename = virJSONValueObjectGetString(json, "filename")))
++        return virStorageSourceParseVitastorColonString(filename, src);
++
++    if (!image) {
++        virReportError(VIR_ERR_INVALID_ARG, "%s",
++                       _("missing image name in Vitastor backing volume "
++                         "JSON specification"));
++        return -1;
++    }
++
++    src->path = g_strdup(image);
++    src->configFile = g_strdup(conf);
++    src->query = g_strdup(etcd_prefix);
++
++    if (servers) {
++        nservers = virJSONValueArraySize(servers);
++
++        src->hosts = g_new0(virStorageNetHostDef, nservers);
++        src->nhosts = nservers;
++
++        for (i = 0; i < nservers; i++) {
++            if (virStorageSourceParseBackingJSONInetSocketAddress(src->hosts + i,
++                                                                  virJSONValueArrayGet(servers, i)) < 0)
++                return -1;
++        }
++    }
++
++    return 0;
++}
++
+ static int
+ virStorageSourceParseBackingJSONRaw(virStorageSource *src,
+                                     virJSONValue *json,
+@@ -1130,6 +1252,7 @@ static const struct virStorageSourceJSONDriverParser jsonParsers[] = {
+     {"sheepdog", false, virStorageSourceParseBackingJSONSheepdog, 0},
+     {"ssh", false, virStorageSourceParseBackingJSONSSH, 0},
+     {"rbd", false, virStorageSourceParseBackingJSONRBD, 0},
++    {"vitastor", false, virStorageSourceParseBackingJSONVitastor, 0},
+     {"raw", true, virStorageSourceParseBackingJSONRaw, 0},
+     {"nfs", false, virStorageSourceParseBackingJSONNFS, 0},
+     {"vxhs", false, virStorageSourceParseBackingJSONVxHS, 0},
+diff --git a/src/test/test_driver.c b/src/test/test_driver.c
+index 1165689de7..bba846351c 100644
+--- a/src/test/test_driver.c
++++ b/src/test/test_driver.c
+@@ -7345,6 +7345,7 @@ testStorageVolumeTypeForPool(int pooltype)
+     case VIR_STORAGE_POOL_ISCSI_DIRECT:
+     case VIR_STORAGE_POOL_GLUSTER:
+     case VIR_STORAGE_POOL_RBD:
++    case VIR_STORAGE_POOL_VITASTOR:
+         return VIR_STORAGE_VOL_NETWORK;
+     case VIR_STORAGE_POOL_LOGICAL:
+     case VIR_STORAGE_POOL_DISK:
+diff --git a/tests/storagepoolcapsschemadata/poolcaps-fs.xml b/tests/storagepoolcapsschemadata/poolcaps-fs.xml
+index eee75af746..8bd0a57bdd 100644
+--- a/tests/storagepoolcapsschemadata/poolcaps-fs.xml
++++ b/tests/storagepoolcapsschemadata/poolcaps-fs.xml
+@@ -204,4 +204,11 @@
+       </enum>
+     </volOptions>
+   </pool>
++  <pool type='vitastor' supported='no'>
++    <volOptions>
++      <defaultFormat type='raw'/>
++      <enum name='targetFormatType'>
++      </enum>
++    </volOptions>
++  </pool>
+ </storagepoolCapabilities>
+diff --git a/tests/storagepoolcapsschemadata/poolcaps-full.xml b/tests/storagepoolcapsschemadata/poolcaps-full.xml
+index 805950a937..852df0de16 100644
+--- a/tests/storagepoolcapsschemadata/poolcaps-full.xml
++++ b/tests/storagepoolcapsschemadata/poolcaps-full.xml
+@@ -204,4 +204,11 @@
+       </enum>
+     </volOptions>
+   </pool>
++  <pool type='vitastor' supported='yes'>
++    <volOptions>
++      <defaultFormat type='raw'/>
++      <enum name='targetFormatType'>
++      </enum>
++    </volOptions>
++  </pool>
+ </storagepoolCapabilities>
+diff --git a/tests/storagepoolxml2argvtest.c b/tests/storagepoolxml2argvtest.c
+index d5c2531ab8..b19308ac38 100644
+--- a/tests/storagepoolxml2argvtest.c
++++ b/tests/storagepoolxml2argvtest.c
+@@ -57,6 +57,7 @@ testCompareXMLToArgvFiles(bool shouldFail,
+     case VIR_STORAGE_POOL_GLUSTER:
+     case VIR_STORAGE_POOL_ZFS:
+     case VIR_STORAGE_POOL_VSTORAGE:
++    case VIR_STORAGE_POOL_VITASTOR:
+     case VIR_STORAGE_POOL_LAST:
+     default:
+         VIR_TEST_DEBUG("pool type '%s' has no xml2argv test", defTypeStr);
+diff --git a/tools/virsh-pool.c b/tools/virsh-pool.c
+index 2010ef1356..072e2ff9e8 100644
+--- a/tools/virsh-pool.c
++++ b/tools/virsh-pool.c
+@@ -1187,6 +1187,9 @@ cmdPoolList(vshControl *ctl, const vshCmd *cmd G_GNUC_UNUSED)
+             case VIR_STORAGE_POOL_VSTORAGE:
+                 flags |= VIR_CONNECT_LIST_STORAGE_POOLS_VSTORAGE;
+                 break;
++            case VIR_STORAGE_POOL_VITASTOR:
++                flags |= VIR_CONNECT_LIST_STORAGE_POOLS_VITASTOR;
++                break;
+             case VIR_STORAGE_POOL_LAST:
+                 break;
+             }
+-- 
+2.51.0
+

patches/libvirt-12.0-vitastor.diff

@@ -0,0 +1,637 @@
+diff --git a/include/libvirt/libvirt-storage.h b/include/libvirt/libvirt-storage.h
+index aaad4a3da1..5f5daa8341 100644
+--- a/include/libvirt/libvirt-storage.h
++++ b/include/libvirt/libvirt-storage.h
+@@ -326,6 +326,7 @@ typedef enum {
+     VIR_CONNECT_LIST_STORAGE_POOLS_ZFS           = 1 << 17, /* (Since: 1.2.8) */
+     VIR_CONNECT_LIST_STORAGE_POOLS_VSTORAGE      = 1 << 18, /* (Since: 3.1.0) */
+     VIR_CONNECT_LIST_STORAGE_POOLS_ISCSI_DIRECT  = 1 << 19, /* (Since: 5.6.0) */
++    VIR_CONNECT_LIST_STORAGE_POOLS_VITASTOR      = 1 << 20, /* (Since: 5.0.0) */
+ } virConnectListAllStoragePoolsFlags;
+ 
+ int                     virConnectListAllStoragePools(virConnectPtr conn,
+diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
+index 9ca5c2450c..cc52f00c0c 100644
+--- a/src/conf/domain_conf.c
++++ b/src/conf/domain_conf.c
+@@ -7453,7 +7453,8 @@ virDomainDiskSourceNetworkParse(xmlNodePtr node,
+     src->configFile = virXPathString("string(./config/@file)", ctxt);
+ 
+     if (src->protocol == VIR_STORAGE_NET_PROTOCOL_HTTP ||
+-        src->protocol == VIR_STORAGE_NET_PROTOCOL_HTTPS)
++        src->protocol == VIR_STORAGE_NET_PROTOCOL_HTTPS ||
++        src->protocol == VIR_STORAGE_NET_PROTOCOL_VITASTOR)
+         src->query = virXMLPropString(node, "query");
+ 
+     if (virDomainStorageNetworkParseHosts(node, ctxt, &src->hosts, &src->nhosts) < 0)
+@@ -32187,6 +32188,7 @@ virDomainStorageSourceTranslateSourcePool(virStorageSource *src,
+ 
+     case VIR_STORAGE_POOL_MPATH:
+     case VIR_STORAGE_POOL_RBD:
++    case VIR_STORAGE_POOL_VITASTOR:
+     case VIR_STORAGE_POOL_SHEEPDOG:
+     case VIR_STORAGE_POOL_GLUSTER:
+     case VIR_STORAGE_POOL_LAST:
+diff --git a/src/conf/domain_validate.c b/src/conf/domain_validate.c
+index 7346a61731..83e94d762e 100644
+--- a/src/conf/domain_validate.c
++++ b/src/conf/domain_validate.c
+@@ -520,6 +520,7 @@ virDomainDiskDefValidateSourceChainOne(const virStorageSource *src)
+         case VIR_STORAGE_NET_PROTOCOL_RBD:
+             break;
+ 
++        case VIR_STORAGE_NET_PROTOCOL_VITASTOR:
+         case VIR_STORAGE_NET_PROTOCOL_NBD:
+         case VIR_STORAGE_NET_PROTOCOL_SHEEPDOG:
+         case VIR_STORAGE_NET_PROTOCOL_GLUSTER:
+@@ -592,7 +593,7 @@ virDomainDiskDefValidateSourceChainOne(const virStorageSource *src)
+         }
+     }
+ 
+-    /* internal snapshots and config files are currently supported only with rbd: */
++    /* internal snapshots are currently supported only with rbd: */
+     if (virStorageSourceGetActualType(src) != VIR_STORAGE_TYPE_NETWORK &&
+         src->protocol != VIR_STORAGE_NET_PROTOCOL_RBD) {
+         if (src->snapshot) {
+@@ -600,10 +601,14 @@ virDomainDiskDefValidateSourceChainOne(const virStorageSource *src)
+                            _("<snapshot> element is currently supported only with 'rbd' disks"));
+             return -1;
+         }
+-
++    }
++    /* config files are currently supported only with rbd and vitastor: */
++    if (virStorageSourceGetActualType(src) != VIR_STORAGE_TYPE_NETWORK &&
++        src->protocol != VIR_STORAGE_NET_PROTOCOL_RBD &&
++        src->protocol != VIR_STORAGE_NET_PROTOCOL_VITASTOR) {
+         if (src->configFile) {
+             virReportError(VIR_ERR_XML_ERROR, "%s",
+-                           _("<config> element is currently supported only with 'rbd' disks"));
++                           _("<config> element is currently supported only with 'rbd' and 'vitastor' disks"));
+             return -1;
+         }
+     }
+diff --git a/src/conf/schemas/domaincommon.rng b/src/conf/schemas/domaincommon.rng
+index 114dd3f96f..c71f9a3277 100644
+--- a/src/conf/schemas/domaincommon.rng
++++ b/src/conf/schemas/domaincommon.rng
+@@ -2093,6 +2093,35 @@
+     </element>
+   </define>
+ 
++  <define name="diskSourceNetworkProtocolVitastor">
++    <element name="source">
++      <interleave>
++        <attribute name="protocol">
++          <value>vitastor</value>
++        </attribute>
++        <ref name="diskSourceCommon"/>
++        <optional>
++          <attribute name="name"/>
++        </optional>
++        <optional>
++          <attribute name="query"/>
++        </optional>
++        <zeroOrMore>
++          <ref name="diskSourceNetworkHost"/>
++        </zeroOrMore>
++        <optional>
++          <element name="config">
++            <attribute name="file">
++              <ref name="absFilePath"/>
++            </attribute>
++            <empty/>
++          </element>
++        </optional>
++        <empty/>
++      </interleave>
++    </element>
++  </define>
++
+   <define name="diskSourceNetworkProtocolISCSI">
+     <element name="source">
+       <attribute name="protocol">
+@@ -2443,6 +2472,7 @@
+       <ref name="diskSourceNetworkProtocolSimple"/>
+       <ref name="diskSourceNetworkProtocolVxHS"/>
+       <ref name="diskSourceNetworkProtocolNFS"/>
++      <ref name="diskSourceNetworkProtocolVitastor"/>
+     </choice>
+   </define>
+ 
+diff --git a/src/conf/storage_conf.c b/src/conf/storage_conf.c
+index 1dc9365bf2..a8a736be81 100644
+--- a/src/conf/storage_conf.c
++++ b/src/conf/storage_conf.c
+@@ -56,7 +56,7 @@ VIR_ENUM_IMPL(virStoragePool,
+               "logical", "disk", "iscsi",
+               "iscsi-direct", "scsi", "mpath",
+               "rbd", "sheepdog", "gluster",
+-              "zfs", "vstorage",
++              "zfs", "vstorage", "vitastor",
+ );
+ 
+ VIR_ENUM_IMPL(virStoragePoolFormatFileSystem,
+@@ -242,6 +242,18 @@ static virStoragePoolTypeInfo poolTypeInfo[] = {
+           .formatToString = virStorageFileFormatTypeToString,
+       }
+     },
++    {.poolType = VIR_STORAGE_POOL_VITASTOR,
++     .poolOptions = {
++         .flags = (VIR_STORAGE_POOL_SOURCE_HOST |
++                   VIR_STORAGE_POOL_SOURCE_NETWORK |
++                   VIR_STORAGE_POOL_SOURCE_NAME),
++      },
++      .volOptions = {
++          .defaultFormat = VIR_STORAGE_FILE_RAW,
++          .formatFromString = virStorageVolumeFormatFromString,
++          .formatToString = virStorageFileFormatTypeToString,
++      }
++    },
+     {.poolType = VIR_STORAGE_POOL_SHEEPDOG,
+      .poolOptions = {
+          .flags = (VIR_STORAGE_POOL_SOURCE_HOST |
+@@ -538,6 +550,11 @@ virStoragePoolDefParseSource(xmlXPathContextPtr ctxt,
+                        _("element 'name' is mandatory for RBD pool"));
+         return -1;
+     }
++    if (pool_type == VIR_STORAGE_POOL_VITASTOR && source->name == NULL) {
++        virReportError(VIR_ERR_XML_ERROR, "%s",
++                       _("element 'name' is mandatory for Vitastor pool"));
++        return -1;
++    }
+ 
+     if (options->formatFromString) {
+         g_autofree char *format = NULL;
+@@ -1127,6 +1144,7 @@ virStoragePoolDefFormatBuf(virBuffer *buf,
+     /* RBD, Sheepdog, Gluster and Iscsi-direct devices are not local block devs nor
+      * files, so they don't have a target */
+     if (def->type != VIR_STORAGE_POOL_RBD &&
++        def->type != VIR_STORAGE_POOL_VITASTOR &&
+         def->type != VIR_STORAGE_POOL_SHEEPDOG &&
+         def->type != VIR_STORAGE_POOL_GLUSTER &&
+         def->type != VIR_STORAGE_POOL_ISCSI_DIRECT) {
+diff --git a/src/conf/storage_conf.h b/src/conf/storage_conf.h
+index fc67957cfe..720c07ef74 100644
+--- a/src/conf/storage_conf.h
++++ b/src/conf/storage_conf.h
+@@ -103,6 +103,7 @@ typedef enum {
+     VIR_STORAGE_POOL_GLUSTER,  /* Gluster device */
+     VIR_STORAGE_POOL_ZFS,      /* ZFS */
+     VIR_STORAGE_POOL_VSTORAGE, /* Virtuozzo Storage */
++    VIR_STORAGE_POOL_VITASTOR, /* Vitastor */
+ 
+     VIR_STORAGE_POOL_LAST,
+ } virStoragePoolType;
+@@ -454,6 +455,7 @@ VIR_ENUM_DECL(virStoragePartedFs);
+                  VIR_CONNECT_LIST_STORAGE_POOLS_SCSI     | \
+                  VIR_CONNECT_LIST_STORAGE_POOLS_MPATH    | \
+                  VIR_CONNECT_LIST_STORAGE_POOLS_RBD      | \
++                 VIR_CONNECT_LIST_STORAGE_POOLS_VITASTOR | \
+                  VIR_CONNECT_LIST_STORAGE_POOLS_SHEEPDOG | \
+                  VIR_CONNECT_LIST_STORAGE_POOLS_GLUSTER  | \
+                  VIR_CONNECT_LIST_STORAGE_POOLS_ZFS      | \
+diff --git a/src/conf/storage_source_conf.c b/src/conf/storage_source_conf.c
+index d7b9bdfecb..38aefd0dd4 100644
+--- a/src/conf/storage_source_conf.c
++++ b/src/conf/storage_source_conf.c
+@@ -90,6 +90,7 @@ VIR_ENUM_IMPL(virStorageNetProtocol,
+               "ssh",
+               "vxhs",
+               "nfs",
++              "vitastor",
+ );
+ 
+ 
+@@ -1317,6 +1318,7 @@ virStorageSourceNetworkDefaultPort(virStorageNetProtocol protocol)
+         case VIR_STORAGE_NET_PROTOCOL_GLUSTER:
+             return 24007;
+ 
++        case VIR_STORAGE_NET_PROTOCOL_VITASTOR:
+         case VIR_STORAGE_NET_PROTOCOL_RBD:
+             /* we don't provide a default for RBD */
+             return 0;
+diff --git a/src/conf/storage_source_conf.h b/src/conf/storage_source_conf.h
+index 22c35d420d..f1e32ea83d 100644
+--- a/src/conf/storage_source_conf.h
++++ b/src/conf/storage_source_conf.h
+@@ -131,6 +131,7 @@ typedef enum {
+     VIR_STORAGE_NET_PROTOCOL_SSH,
+     VIR_STORAGE_NET_PROTOCOL_VXHS,
+     VIR_STORAGE_NET_PROTOCOL_NFS,
++    VIR_STORAGE_NET_PROTOCOL_VITASTOR,
+ 
+     VIR_STORAGE_NET_PROTOCOL_LAST
+ } virStorageNetProtocol;
+diff --git a/src/conf/virstorageobj.c b/src/conf/virstorageobj.c
+index 59fa5da372..4739167f5f 100644
+--- a/src/conf/virstorageobj.c
++++ b/src/conf/virstorageobj.c
+@@ -1438,6 +1438,7 @@ virStoragePoolObjSourceFindDuplicateCb(const void *payload,
+             return 1;
+         break;
+ 
++    case VIR_STORAGE_POOL_VITASTOR:
+     case VIR_STORAGE_POOL_ISCSI_DIRECT:
+     case VIR_STORAGE_POOL_RBD:
+     case VIR_STORAGE_POOL_LAST:
+@@ -1921,6 +1922,8 @@ virStoragePoolObjMatch(virStoragePoolObj *obj,
+                (obj->def->type == VIR_STORAGE_POOL_MPATH))   ||
+               (MATCH(VIR_CONNECT_LIST_STORAGE_POOLS_RBD) &&
+                (obj->def->type == VIR_STORAGE_POOL_RBD))     ||
++              (MATCH(VIR_CONNECT_LIST_STORAGE_POOLS_VITASTOR) &&
++               (obj->def->type == VIR_STORAGE_POOL_VITASTOR)) ||
+               (MATCH(VIR_CONNECT_LIST_STORAGE_POOLS_SHEEPDOG) &&
+                (obj->def->type == VIR_STORAGE_POOL_SHEEPDOG)) ||
+               (MATCH(VIR_CONNECT_LIST_STORAGE_POOLS_GLUSTER) &&
+diff --git a/src/libvirt-storage.c b/src/libvirt-storage.c
+index db7660aac4..561df34709 100644
+--- a/src/libvirt-storage.c
++++ b/src/libvirt-storage.c
+@@ -94,6 +94,7 @@ virStoragePoolGetConnect(virStoragePoolPtr pool)
+  * VIR_CONNECT_LIST_STORAGE_POOLS_SCSI
+  * VIR_CONNECT_LIST_STORAGE_POOLS_MPATH
+  * VIR_CONNECT_LIST_STORAGE_POOLS_RBD
++ * VIR_CONNECT_LIST_STORAGE_POOLS_VITASTOR
+  * VIR_CONNECT_LIST_STORAGE_POOLS_SHEEPDOG
+  * VIR_CONNECT_LIST_STORAGE_POOLS_GLUSTER
+  * VIR_CONNECT_LIST_STORAGE_POOLS_ZFS
+diff --git a/src/libxl/libxl_conf.c b/src/libxl/libxl_conf.c
+index 2b988157fa..9d0eb47b25 100644
+--- a/src/libxl/libxl_conf.c
++++ b/src/libxl/libxl_conf.c
+@@ -1069,6 +1069,7 @@ libxlMakeNetworkDiskSrcStr(virStorageSource *src,
+     case VIR_STORAGE_NET_PROTOCOL_SSH:
+     case VIR_STORAGE_NET_PROTOCOL_VXHS:
+     case VIR_STORAGE_NET_PROTOCOL_NFS:
++    case VIR_STORAGE_NET_PROTOCOL_VITASTOR:
+     case VIR_STORAGE_NET_PROTOCOL_LAST:
+     case VIR_STORAGE_NET_PROTOCOL_NONE:
+         virReportError(VIR_ERR_NO_SUPPORT,
+diff --git a/src/libxl/xen_xl.c b/src/libxl/xen_xl.c
+index e72e7d7f44..8482c21805 100644
+--- a/src/libxl/xen_xl.c
++++ b/src/libxl/xen_xl.c
+@@ -1461,6 +1461,7 @@ xenFormatXLDiskSrcNet(virStorageSource *src)
+     case VIR_STORAGE_NET_PROTOCOL_SSH:
+     case VIR_STORAGE_NET_PROTOCOL_VXHS:
+     case VIR_STORAGE_NET_PROTOCOL_NFS:
++    case VIR_STORAGE_NET_PROTOCOL_VITASTOR:
+     case VIR_STORAGE_NET_PROTOCOL_LAST:
+     case VIR_STORAGE_NET_PROTOCOL_NONE:
+         virReportError(VIR_ERR_NO_SUPPORT,
+diff --git a/src/qemu/qemu_block.c b/src/qemu/qemu_block.c
+index 9b43279797..459d8e8a65 100644
+--- a/src/qemu/qemu_block.c
++++ b/src/qemu/qemu_block.c
+@@ -743,6 +743,38 @@ qemuBlockStorageSourceGetRBDProps(virStorageSource *src,
+ }
+ 
+ 
++static virJSONValue *
++qemuBlockStorageSourceGetVitastorProps(virStorageSource *src)
++{
++    virJSONValue *ret = NULL;
++    virStorageNetHostDef *host;
++    size_t i;
++    g_auto(virBuffer) buf = VIR_BUFFER_INITIALIZER;
++    g_autofree char *etcd = NULL;
++
++    for (i = 0; i < src->nhosts; i++) {
++        host = src->hosts + i;
++        if ((virStorageNetHostTransport)host->transport != VIR_STORAGE_NET_HOST_TRANS_TCP) {
++            return NULL;
++        }
++        virBufferAsprintf(&buf, i > 0 ? ",%s:%u" : "%s:%u", host->name, host->port);
++    }
++    if (src->nhosts > 0) {
++        etcd = virBufferContentAndReset(&buf);
++    }
++
++    if (virJSONValueObjectAdd(&ret,
++                              "S:etcd-host", etcd,
++                              "S:etcd-prefix", src->query,
++                              "S:config-path", src->configFile,
++                              "s:image", src->path,
++                              NULL) < 0)
++        return NULL;
++
++    return ret;
++}
++
++
+ static virJSONValue *
+ qemuBlockStorageSourceGetSshProps(virStorageSource *src)
+ {
+@@ -1094,6 +1126,12 @@ qemuBlockStorageSourceGetBackendProps(virStorageSource *src,
+                 return NULL;
+             break;
+ 
++        case VIR_STORAGE_NET_PROTOCOL_VITASTOR:
++            driver = "vitastor";
++            if (!(fileprops = qemuBlockStorageSourceGetVitastorProps(src)))
++                return NULL;
++            break;
++
+         case VIR_STORAGE_NET_PROTOCOL_SSH:
+             driver = "ssh";
+             if (!(fileprops = qemuBlockStorageSourceGetSshProps(src)))
+@@ -1997,6 +2035,7 @@ qemuBlockGetBackingStoreString(virStorageSource *src,
+ 
+             case VIR_STORAGE_NET_PROTOCOL_SHEEPDOG:
+             case VIR_STORAGE_NET_PROTOCOL_RBD:
++            case VIR_STORAGE_NET_PROTOCOL_VITASTOR:
+             case VIR_STORAGE_NET_PROTOCOL_VXHS:
+             case VIR_STORAGE_NET_PROTOCOL_NFS:
+             case VIR_STORAGE_NET_PROTOCOL_SSH:
+@@ -2377,6 +2416,12 @@ qemuBlockStorageSourceCreateGetStorageProps(virStorageSource *src,
+                 return -1;
+             break;
+ 
++        case VIR_STORAGE_NET_PROTOCOL_VITASTOR:
++            driver = "vitastor";
++            if (!(location = qemuBlockStorageSourceGetVitastorProps(src)))
++                return -1;
++            break;
++
+         case VIR_STORAGE_NET_PROTOCOL_SSH:
+             if (srcPriv->nbdkitProcess) {
+                 /* disk creation not yet supported with nbdkit, and even if it
+diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
+index ac56fc7cb4..9e407b4aab 100644
+--- a/src/qemu/qemu_domain.c
++++ b/src/qemu/qemu_domain.c
+@@ -4677,7 +4677,8 @@ qemuDomainValidateStorageSource(virStorageSource *src,
+     if (src->query &&
+         (actualType != VIR_STORAGE_TYPE_NETWORK ||
+          (src->protocol != VIR_STORAGE_NET_PROTOCOL_HTTPS &&
+-          src->protocol != VIR_STORAGE_NET_PROTOCOL_HTTP))) {
++          src->protocol != VIR_STORAGE_NET_PROTOCOL_HTTP &&
++          src->protocol != VIR_STORAGE_NET_PROTOCOL_VITASTOR))) {
+         virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
+                        _("query is supported only with HTTP(S) protocols"));
+         return -1;
+@@ -9103,6 +9104,7 @@ qemuDomainPrepareStorageSourceTLS(virStorageSource *src,
+         break;
+ 
+     case VIR_STORAGE_NET_PROTOCOL_RBD:
++    case VIR_STORAGE_NET_PROTOCOL_VITASTOR:
+     case VIR_STORAGE_NET_PROTOCOL_SHEEPDOG:
+     case VIR_STORAGE_NET_PROTOCOL_GLUSTER:
+     case VIR_STORAGE_NET_PROTOCOL_ISCSI:
+diff --git a/src/qemu/qemu_snapshot.c b/src/qemu/qemu_snapshot.c
+index e738afffc3..37d64f469b 100644
+--- a/src/qemu/qemu_snapshot.c
++++ b/src/qemu/qemu_snapshot.c
+@@ -665,6 +665,7 @@ qemuSnapshotPrepareDiskExternalInactive(virDomainSnapshotDiskDef *snapdisk,
+         case VIR_STORAGE_NET_PROTOCOL_NONE:
+         case VIR_STORAGE_NET_PROTOCOL_NBD:
+         case VIR_STORAGE_NET_PROTOCOL_RBD:
++        case VIR_STORAGE_NET_PROTOCOL_VITASTOR:
+         case VIR_STORAGE_NET_PROTOCOL_SHEEPDOG:
+         case VIR_STORAGE_NET_PROTOCOL_GLUSTER:
+         case VIR_STORAGE_NET_PROTOCOL_ISCSI:
+@@ -893,6 +894,7 @@ qemuSnapshotPrepareDiskInternal(virDomainDiskDef *disk,
+         case VIR_STORAGE_NET_PROTOCOL_NONE:
+         case VIR_STORAGE_NET_PROTOCOL_NBD:
+         case VIR_STORAGE_NET_PROTOCOL_RBD:
++        case VIR_STORAGE_NET_PROTOCOL_VITASTOR:
+         case VIR_STORAGE_NET_PROTOCOL_SHEEPDOG:
+         case VIR_STORAGE_NET_PROTOCOL_GLUSTER:
+         case VIR_STORAGE_NET_PROTOCOL_ISCSI:
+diff --git a/src/storage/storage_driver.c b/src/storage/storage_driver.c
+index e19e032427..59f91f4710 100644
+--- a/src/storage/storage_driver.c
++++ b/src/storage/storage_driver.c
+@@ -1626,6 +1626,7 @@ storageVolLookupByPathCallback(virStoragePoolObj *obj,
+ 
+         case VIR_STORAGE_POOL_GLUSTER:
+         case VIR_STORAGE_POOL_RBD:
++        case VIR_STORAGE_POOL_VITASTOR:
+         case VIR_STORAGE_POOL_SHEEPDOG:
+         case VIR_STORAGE_POOL_ZFS:
+         case VIR_STORAGE_POOL_LAST:
+diff --git a/src/storage_file/storage_source_backingstore.c b/src/storage_file/storage_source_backingstore.c
+index 821378883c..2211f6891b 100644
+--- a/src/storage_file/storage_source_backingstore.c
++++ b/src/storage_file/storage_source_backingstore.c
+@@ -264,6 +264,75 @@ virStorageSourceParseRBDColonString(const char *rbdstr,
+ }
+ 
+ 
++static int
++virStorageSourceParseVitastorColonString(const char *colonstr,
++                                         virStorageSource *src)
++{
++    char *p, *e, *next;
++    g_autofree char *options = NULL;
++
++    /* optionally skip the "vitastor:" prefix if provided */
++    if (STRPREFIX(colonstr, "vitastor:"))
++        colonstr += strlen("vitastor:");
++
++    options = g_strdup(colonstr);
++
++    p = options;
++    while (*p) {
++        /* find : delimiter or end of string */
++        for (e = p; *e && *e != ':'; ++e) {
++            if (*e == '\\') {
++                e++;
++                if (*e == '\0')
++                    break;
++            }
++        }
++        if (*e == '\0') {
++            next = e;    /* last kv pair */
++        } else {
++            next = e + 1;
++            *e = '\0';
++        }
++
++        if (STRPREFIX(p, "image=")) {
++            src->path = g_strdup(p + strlen("image="));
++        } else if (STRPREFIX(p, "etcd-prefix=")) {
++            src->query = g_strdup(p + strlen("etcd-prefix="));
++        } else if (STRPREFIX(p, "config-path=")) {
++            src->configFile = g_strdup(p + strlen("config-path="));
++        } else if (STRPREFIX(p, "etcd-host=")) {
++            char *h, *sep;
++
++            h = p + strlen("etcd-host=");
++            while (h < e) {
++                for (sep = h; sep < e; ++sep) {
++                    if (*sep == '\\' && (sep[1] == ',' ||
++                                         sep[1] == ';' ||
++                                         sep[1] == ' ')) {
++                        *sep = '\0';
++                        sep += 2;
++                        break;
++                    }
++                }
++
++                if (virStorageSourceRBDAddHost(src, h) < 0)
++                    return -1;
++
++                h = sep;
++            }
++        }
++
++        p = next;
++    }
++
++    if (!src->path) {
++        return -1;
++    }
++
++    return 0;
++}
++
++
+ static int
+ virStorageSourceParseNBDColonString(const char *nbdstr,
+                                     virStorageSource *src)
+@@ -379,6 +448,11 @@ virStorageSourceParseBackingColon(virStorageSource *src,
+             return -1;
+         break;
+ 
++    case VIR_STORAGE_NET_PROTOCOL_VITASTOR:
++        if (virStorageSourceParseVitastorColonString(path, src) < 0)
++            return -1;
++        break;
++
+     case VIR_STORAGE_NET_PROTOCOL_SHEEPDOG:
+     case VIR_STORAGE_NET_PROTOCOL_LAST:
+     case VIR_STORAGE_NET_PROTOCOL_NONE:
+@@ -953,6 +1027,54 @@ virStorageSourceParseBackingJSONRBD(virStorageSource *src,
+     return 0;
+ }
+ 
++static int
++virStorageSourceParseBackingJSONVitastor(virStorageSource *src,
++                                         virJSONValue *json,
++                                         const char *jsonstr G_GNUC_UNUSED,
++                                         int opaque G_GNUC_UNUSED)
++{
++    const char *filename;
++    const char *image = virJSONValueObjectGetString(json, "image");
++    const char *conf = virJSONValueObjectGetString(json, "config-path");
++    const char *etcd_prefix = virJSONValueObjectGetString(json, "etcd-prefix");
++    virJSONValue *servers = virJSONValueObjectGetArray(json, "server");
++    size_t nservers;
++    size_t i;
++
++    src->type = VIR_STORAGE_TYPE_NETWORK;
++    src->protocol = VIR_STORAGE_NET_PROTOCOL_VITASTOR;
++
++    /* legacy syntax passed via 'filename' option */
++    if ((filename = virJSONValueObjectGetString(json, "filename")))
++        return virStorageSourceParseVitastorColonString(filename, src);
++
++    if (!image) {
++        virReportError(VIR_ERR_INVALID_ARG, "%s",
++                       _("missing image name in Vitastor backing volume "
++                         "JSON specification"));
++        return -1;
++    }
++
++    src->path = g_strdup(image);
++    src->configFile = g_strdup(conf);
++    src->query = g_strdup(etcd_prefix);
++
++    if (servers) {
++        nservers = virJSONValueArraySize(servers);
++
++        src->hosts = g_new0(virStorageNetHostDef, nservers);
++        src->nhosts = nservers;
++
++        for (i = 0; i < nservers; i++) {
++            if (virStorageSourceParseBackingJSONInetSocketAddress(src->hosts + i,
++                                                                  virJSONValueArrayGet(servers, i)) < 0)
++                return -1;
++        }
++    }
++
++    return 0;
++}
++
+ static int
+ virStorageSourceParseBackingJSONRaw(virStorageSource *src,
+                                     virJSONValue *json,
+@@ -1130,6 +1252,7 @@ static const struct virStorageSourceJSONDriverParser jsonParsers[] = {
+     {"sheepdog", false, virStorageSourceParseBackingJSONSheepdog, 0},
+     {"ssh", false, virStorageSourceParseBackingJSONSSH, 0},
+     {"rbd", false, virStorageSourceParseBackingJSONRBD, 0},
++    {"vitastor", false, virStorageSourceParseBackingJSONVitastor, 0},
+     {"raw", true, virStorageSourceParseBackingJSONRaw, 0},
+     {"nfs", false, virStorageSourceParseBackingJSONNFS, 0},
+     {"vxhs", false, virStorageSourceParseBackingJSONVxHS, 0},
+diff --git a/src/test/test_driver.c b/src/test/test_driver.c
+index 1165689de7..bba846351c 100644
+--- a/src/test/test_driver.c
++++ b/src/test/test_driver.c
+@@ -7345,6 +7345,7 @@ testStorageVolumeTypeForPool(int pooltype)
+     case VIR_STORAGE_POOL_ISCSI_DIRECT:
+     case VIR_STORAGE_POOL_GLUSTER:
+     case VIR_STORAGE_POOL_RBD:
++    case VIR_STORAGE_POOL_VITASTOR:
+         return VIR_STORAGE_VOL_NETWORK;
+     case VIR_STORAGE_POOL_LOGICAL:
+     case VIR_STORAGE_POOL_DISK:
+diff --git a/tests/storagepoolcapsschemadata/poolcaps-fs.xml b/tests/storagepoolcapsschemadata/poolcaps-fs.xml
+index eee75af746..8bd0a57bdd 100644
+--- a/tests/storagepoolcapsschemadata/poolcaps-fs.xml
++++ b/tests/storagepoolcapsschemadata/poolcaps-fs.xml
+@@ -204,4 +204,11 @@
+       </enum>
+     </volOptions>
+   </pool>
++  <pool type='vitastor' supported='no'>
++    <volOptions>
++      <defaultFormat type='raw'/>
++      <enum name='targetFormatType'>
++      </enum>
++    </volOptions>
++  </pool>
+ </storagepoolCapabilities>
+diff --git a/tests/storagepoolcapsschemadata/poolcaps-full.xml b/tests/storagepoolcapsschemadata/poolcaps-full.xml
+index 805950a937..852df0de16 100644
+--- a/tests/storagepoolcapsschemadata/poolcaps-full.xml
++++ b/tests/storagepoolcapsschemadata/poolcaps-full.xml
+@@ -204,4 +204,11 @@
+       </enum>
+     </volOptions>
+   </pool>
++  <pool type='vitastor' supported='yes'>
++    <volOptions>
++      <defaultFormat type='raw'/>
++      <enum name='targetFormatType'>
++      </enum>
++    </volOptions>
++  </pool>
+ </storagepoolCapabilities>
+diff --git a/tests/storagepoolxml2argvtest.c b/tests/storagepoolxml2argvtest.c
+index d5c2531ab8..b19308ac38 100644
+--- a/tests/storagepoolxml2argvtest.c
++++ b/tests/storagepoolxml2argvtest.c
+@@ -57,6 +57,7 @@ testCompareXMLToArgvFiles(bool shouldFail,
+     case VIR_STORAGE_POOL_GLUSTER:
+     case VIR_STORAGE_POOL_ZFS:
+     case VIR_STORAGE_POOL_VSTORAGE:
++    case VIR_STORAGE_POOL_VITASTOR:
+     case VIR_STORAGE_POOL_LAST:
+     default:
+         VIR_TEST_DEBUG("pool type '%s' has no xml2argv test", defTypeStr);
+diff --git a/tools/virsh-pool.c b/tools/virsh-pool.c
+index 2010ef1356..072e2ff9e8 100644
+--- a/tools/virsh-pool.c
++++ b/tools/virsh-pool.c
+@@ -1187,6 +1187,9 @@ cmdPoolList(vshControl *ctl, const vshCmd *cmd G_GNUC_UNUSED)
+             case VIR_STORAGE_POOL_VSTORAGE:
+                 flags |= VIR_CONNECT_LIST_STORAGE_POOLS_VSTORAGE;
+                 break;
++            case VIR_STORAGE_POOL_VITASTOR:
++                flags |= VIR_CONNECT_LIST_STORAGE_POOLS_VITASTOR;
++                break;
+             case VIR_STORAGE_POOL_LAST:
+                 break;
+             }

patches/qemu-10.1-vitastor.patch

@@ -1,29 +1,172 @@
-diff --git a/src/client/qemu_driver.c b/src/client/qemu_driver.c
-index d8356dab..5f4cd50d 100644
---- a/src/client/qemu_driver.c
-+++ b/src/client/qemu_driver.c
-@@ -974,14 +974,21 @@ static void vitastor_co_read_bitmap_cb(void *opaque, long retval, uint8_t *bitma
- #endif
- }
+diff --git a/block/meson.build b/block/meson.build
+index 34b1b2a306..24ca0f1e52 100644
+--- a/block/meson.build
++++ b/block/meson.build
+@@ -114,6 +114,7 @@ foreach m : [
+   [libnfs, 'nfs', files('nfs.c')],
+   [libssh, 'ssh', files('ssh.c')],
+   [rbd, 'rbd', files('rbd.c')],
++  [vitastor, 'vitastor', files('vitastor.c')],
+ ]
+   if m[0].found()
+     module_ss = ss.source_set()
+diff --git a/meson.build b/meson.build
+index 50c774a195..e5c7a3a4b1 100644
+--- a/meson.build
++++ b/meson.build
+@@ -1652,6 +1652,26 @@ if not get_option('rbd').auto() or have_block
+   endif
+ endif
  
--static int coroutine_fn vitastor_co_block_status(
--    BlockDriverState *bs, bool want_zero, int64_t offset, int64_t bytes,
--    int64_t *pnum, int64_t *map, BlockDriverState **file)
-+static int coroutine_fn vitastor_co_block_status(BlockDriverState *bs,
-+#if QEMU_VERSION_MAJOR > 10 || QEMU_VERSION_MAJOR == 10 && QEMU_VERSION_MINOR >= 1
-+    unsigned int mode,
-+#else
-+    bool want_zero,
-+#endif
-+    int64_t offset, int64_t bytes, int64_t *pnum, int64_t *map, BlockDriverState **file)
- {
-     // Allocated => return BDRV_BLOCK_DATA|BDRV_BLOCK_OFFSET_VALID
-     // Not allocated => return 0
-     // Error => return -errno
-     // Set pnum to length of the extent, `*map` = `offset`, `*file` = `bs`
-+#if QEMU_VERSION_MAJOR > 10 || QEMU_VERSION_MAJOR == 10 && QEMU_VERSION_MINOR >= 1
-+    int want_zero = (mode == BDRV_WANT_PRECISE);
-+#endif
-     VitastorRPC task;
-     VitastorClient *client = bs->opaque;
-     uint64_t inode = client->watch ? vitastor_c_inode_get_num(client->watch) : client->inode;
++vitastor = not_found
++if not get_option('vitastor').auto() or have_block
++  libvitastor_client = cc.find_library('vitastor_client', has_headers: ['vitastor_c.h'],
++    required: get_option('vitastor'))
++  if libvitastor_client.found()
++    if cc.links('''
++      #include <vitastor_c.h>
++      int main(void) {
++        vitastor_c_create_qemu(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
++        return 0;
++      }''', dependencies: libvitastor_client)
++      vitastor = declare_dependency(dependencies: libvitastor_client)
++    elif get_option('vitastor').enabled()
++      error('could not link libvitastor_client')
++    else
++      warning('could not link libvitastor_client, disabling')
++    endif
++  endif
++endif
++
+ glusterfs = not_found
+ glusterfs_ftruncate_has_stat = false
+ glusterfs_iocb_has_stat = false
+@@ -2547,6 +2567,7 @@ endif
+ config_host_data.set('CONFIG_OPENGL', opengl.found())
+ config_host_data.set('CONFIG_PLUGIN', get_option('plugins'))
+ config_host_data.set('CONFIG_RBD', rbd.found())
++config_host_data.set('CONFIG_VITASTOR', vitastor.found())
+ config_host_data.set('CONFIG_RDMA', rdma.found())
+ config_host_data.set('CONFIG_RELOCATABLE', get_option('relocatable'))
+ config_host_data.set('CONFIG_SAFESTACK', get_option('safe_stack'))
+@@ -4972,6 +4993,7 @@ summary_info += {'fdt support':       fdt_opt == 'internal' ? 'internal' : fdt}
+ summary_info += {'libcap-ng support': libcap_ng}
+ summary_info += {'bpf support':       libbpf}
+ summary_info += {'rbd support':       rbd}
++summary_info += {'vitastor support':  vitastor}
+ summary_info += {'smartcard support': cacard}
+ summary_info += {'U2F support':       u2f}
+ summary_info += {'libusb':            libusb}
+diff --git a/meson_options.txt b/meson_options.txt
+index fff1521e58..f0844c0e00 100644
+--- a/meson_options.txt
++++ b/meson_options.txt
+@@ -202,6 +202,8 @@ option('pvg', type: 'feature', value: 'auto',
+        description: 'macOS paravirtualized graphics support')
+ option('rbd', type : 'feature', value : 'auto',
+        description: 'Ceph block device driver')
++option('vitastor', type : 'feature', value : 'auto',
++       description: 'Vitastor block device driver')
+ option('opengl', type : 'feature', value : 'auto',
+        description: 'OpenGL support')
+ option('rdma', type : 'feature', value : 'auto',
+diff --git a/qapi/block-core.json b/qapi/block-core.json
+index dc6eb4ae23..d043f4340e 100644
+--- a/qapi/block-core.json
++++ b/qapi/block-core.json
+@@ -3280,7 +3280,7 @@
+             'parallels', 'preallocate', 'qcow', 'qcow2', 'qed', 'quorum',
+             'raw', 'rbd',
+             { 'name': 'replication', 'if': 'CONFIG_REPLICATION' },
+-            'ssh', 'throttle', 'vdi', 'vhdx',
++            'ssh', 'throttle', 'vdi', 'vhdx', 'vitastor',
+             { 'name': 'virtio-blk-vfio-pci', 'if': 'CONFIG_BLKIO' },
+             { 'name': 'virtio-blk-vhost-user', 'if': 'CONFIG_BLKIO' },
+             { 'name': 'virtio-blk-vhost-vdpa', 'if': 'CONFIG_BLKIO' },
+@@ -4363,6 +4363,28 @@
+             '*key-secret': 'str',
+             '*server': ['InetSocketAddressBase'] } }
+ 
++##
++# @BlockdevOptionsVitastor:
++#
++# Driver specific block device options for vitastor
++#
++# @image:       Image name
++# @inode:       Inode number
++# @pool:        Pool ID
++# @size:        Desired image size in bytes
++# @config-path: Path to Vitastor configuration
++# @etcd-host:   etcd connection address(es)
++# @etcd-prefix: etcd key/value prefix
++##
++{ 'struct': 'BlockdevOptionsVitastor',
++  'data': { '*inode': 'uint64',
++            '*pool': 'uint64',
++            '*size': 'uint64',
++            '*image': 'str',
++            '*config-path': 'str',
++            '*etcd-host': 'str',
++            '*etcd-prefix': 'str' } }
++
+ ##
+ # @ReplicationMode:
+ #
+@@ -4831,6 +4853,7 @@
+       'throttle':   'BlockdevOptionsThrottle',
+       'vdi':        'BlockdevOptionsGenericFormat',
+       'vhdx':       'BlockdevOptionsGenericFormat',
++      'vitastor':   'BlockdevOptionsVitastor',
+       'virtio-blk-vfio-pci':
+                     { 'type': 'BlockdevOptionsVirtioBlkVfioPci',
+                       'if': 'CONFIG_BLKIO' },
+@@ -5304,6 +5327,20 @@
+             '*cluster-size' :   'size',
+             '*encrypt' :        'RbdEncryptionCreateOptions' } }
+ 
++##
++# @BlockdevCreateOptionsVitastor:
++#
++# Driver specific image creation options for Vitastor.
++#
++# @location: Where to store the new image file.  This location cannot
++#     point to a snapshot.
++#
++# @size: Size of the virtual disk in bytes
++##
++{ 'struct': 'BlockdevCreateOptionsVitastor',
++  'data': { 'location':         'BlockdevOptionsVitastor',
++            'size':             'size' } }
++
+ ##
+ # @BlockdevVmdkSubformat:
+ #
+@@ -5526,6 +5563,7 @@
+       'ssh':            'BlockdevCreateOptionsSsh',
+       'vdi':            'BlockdevCreateOptionsVdi',
+       'vhdx':           'BlockdevCreateOptionsVhdx',
++      'vitastor':       'BlockdevCreateOptionsVitastor',
+       'vmdk':           'BlockdevCreateOptionsVmdk',
+       'vpc':            'BlockdevCreateOptionsVpc'
+   } }
+diff --git a/scripts/meson-buildoptions.sh b/scripts/meson-buildoptions.sh
+index 0ebe6bc52a..2c37ad3892 100644
+--- a/scripts/meson-buildoptions.sh
++++ b/scripts/meson-buildoptions.sh
+@@ -175,6 +175,7 @@ meson_options_help() {
+   printf "%s\n" '  qga-vss         build QGA VSS support (broken with MinGW)'
+   printf "%s\n" '  qpl             Query Processing Library support'
+   printf "%s\n" '  rbd             Ceph block device driver'
++  printf "%s\n" '  vitastor        Vitastor block device driver'
+   printf "%s\n" '  rdma            Enable RDMA-based migration'
+   printf "%s\n" '  replication     replication support'
+   printf "%s\n" '  rust            Rust support'
+@@ -459,6 +460,8 @@ _meson_option_parse() {
+     --disable-qpl) printf "%s" -Dqpl=disabled ;;
+     --enable-rbd) printf "%s" -Drbd=enabled ;;
+     --disable-rbd) printf "%s" -Drbd=disabled ;;
++    --enable-vitastor) printf "%s" -Dvitastor=enabled ;;
++    --disable-vitastor) printf "%s" -Dvitastor=disabled ;;
+     --enable-rdma) printf "%s" -Drdma=enabled ;;
+     --disable-rdma) printf "%s" -Drdma=disabled ;;
+     --enable-relocatable) printf "%s" -Drelocatable=true ;;

patches/qemu-10.2-vitastor.patch

@@ -0,0 +1,172 @@
+diff --git a/block/meson.build b/block/meson.build
+index 34b1b2a306..24ca0f1e52 100644
+--- a/block/meson.build
++++ b/block/meson.build
+@@ -114,6 +114,7 @@ foreach m : [
+   [libnfs, 'nfs', files('nfs.c')],
+   [libssh, 'ssh', files('ssh.c')],
+   [rbd, 'rbd', files('rbd.c')],
++  [vitastor, 'vitastor', files('vitastor.c')],
+ ]
+   if m[0].found()
+     module_ss = ss.source_set()
+diff --git a/meson.build b/meson.build
+index d9293294d8..776a5becc6 100644
+--- a/meson.build
++++ b/meson.build
+@@ -1665,6 +1665,26 @@ if not get_option('rbd').auto() or have_block
+   endif
+ endif
+ 
++vitastor = not_found
++if not get_option('vitastor').auto() or have_block
++  libvitastor_client = cc.find_library('vitastor_client', has_headers: ['vitastor_c.h'],
++    required: get_option('vitastor'))
++  if libvitastor_client.found()
++    if cc.links('''
++      #include <vitastor_c.h>
++      int main(void) {
++        vitastor_c_create_qemu(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
++        return 0;
++      }''', dependencies: libvitastor_client)
++      vitastor = declare_dependency(dependencies: libvitastor_client)
++    elif get_option('vitastor').enabled()
++      error('could not link libvitastor_client')
++    else
++      warning('could not link libvitastor_client, disabling')
++    endif
++  endif
++endif
++
+ glusterfs = not_found
+ glusterfs_ftruncate_has_stat = false
+ glusterfs_iocb_has_stat = false
+@@ -2509,6 +2529,7 @@ endif
+ config_host_data.set('CONFIG_OPENGL', opengl.found())
+ config_host_data.set('CONFIG_PLUGIN', get_option('plugins'))
+ config_host_data.set('CONFIG_RBD', rbd.found())
++config_host_data.set('CONFIG_VITASTOR', vitastor.found())
+ config_host_data.set('CONFIG_RDMA', rdma.found())
+ config_host_data.set('CONFIG_RELOCATABLE', get_option('relocatable'))
+ config_host_data.set('CONFIG_SAFESTACK', get_option('safe_stack'))
+@@ -4948,6 +4969,7 @@ summary_info += {'fdt support':       fdt_opt == 'internal' ? 'internal' : fdt}
+ summary_info += {'libcap-ng support': libcap_ng}
+ summary_info += {'bpf support':       libbpf}
+ summary_info += {'rbd support':       rbd}
++summary_info += {'vitastor support':  vitastor}
+ summary_info += {'smartcard support': cacard}
+ summary_info += {'U2F support':       u2f}
+ summary_info += {'libusb':            libusb}
+diff --git a/meson_options.txt b/meson_options.txt
+index 2836156257..148086cc6f 100644
+--- a/meson_options.txt
++++ b/meson_options.txt
+@@ -206,6 +206,8 @@ option('pvg', type: 'feature', value: 'auto',
+        description: 'macOS paravirtualized graphics support')
+ option('rbd', type : 'feature', value : 'auto',
+        description: 'Ceph block device driver')
++option('vitastor', type : 'feature', value : 'auto',
++       description: 'Vitastor block device driver')
+ option('opengl', type : 'feature', value : 'auto',
+        description: 'OpenGL support')
+ option('rdma', type : 'feature', value : 'auto',
+diff --git a/qapi/block-core.json b/qapi/block-core.json
+index b82af74256..f25a6f5ce8 100644
+--- a/qapi/block-core.json
++++ b/qapi/block-core.json
+@@ -3351,7 +3351,7 @@
+             'parallels', 'preallocate', 'qcow', 'qcow2', 'qed', 'quorum',
+             'raw', 'rbd',
+             { 'name': 'replication', 'if': 'CONFIG_REPLICATION' },
+-            'ssh', 'throttle', 'vdi', 'vhdx',
++            'ssh', 'throttle', 'vdi', 'vhdx', 'vitastor',
+             { 'name': 'virtio-blk-vfio-pci', 'if': 'CONFIG_BLKIO' },
+             { 'name': 'virtio-blk-vhost-user', 'if': 'CONFIG_BLKIO' },
+             { 'name': 'virtio-blk-vhost-vdpa', 'if': 'CONFIG_BLKIO' },
+@@ -4434,6 +4434,28 @@
+             '*key-secret': 'str',
+             '*server': ['InetSocketAddressBase'] } }
+ 
++##
++# @BlockdevOptionsVitastor:
++#
++# Driver specific block device options for vitastor
++#
++# @image:       Image name
++# @inode:       Inode number
++# @pool:        Pool ID
++# @size:        Desired image size in bytes
++# @config-path: Path to Vitastor configuration
++# @etcd-host:   etcd connection address(es)
++# @etcd-prefix: etcd key/value prefix
++##
++{ 'struct': 'BlockdevOptionsVitastor',
++  'data': { '*inode': 'uint64',
++            '*pool': 'uint64',
++            '*size': 'uint64',
++            '*image': 'str',
++            '*config-path': 'str',
++            '*etcd-host': 'str',
++            '*etcd-prefix': 'str' } }
++
+ ##
+ # @ReplicationMode:
+ #
+@@ -4902,6 +4924,7 @@
+       'throttle':   'BlockdevOptionsThrottle',
+       'vdi':        'BlockdevOptionsGenericFormat',
+       'vhdx':       'BlockdevOptionsGenericFormat',
++      'vitastor':   'BlockdevOptionsVitastor',
+       'virtio-blk-vfio-pci':
+                     { 'type': 'BlockdevOptionsVirtioBlkVfioPci',
+                       'if': 'CONFIG_BLKIO' },
+@@ -5376,6 +5399,20 @@
+             '*cluster-size' :   'size',
+             '*encrypt' :        'RbdEncryptionCreateOptions' } }
+ 
++##
++# @BlockdevCreateOptionsVitastor:
++#
++# Driver specific image creation options for Vitastor.
++#
++# @location: Where to store the new image file.  This location cannot
++#     point to a snapshot.
++#
++# @size: Size of the virtual disk in bytes
++##
++{ 'struct': 'BlockdevCreateOptionsVitastor',
++  'data': { 'location':         'BlockdevOptionsVitastor',
++            'size':             'size' } }
++
+ ##
+ # @BlockdevVmdkSubformat:
+ #
+@@ -5598,6 +5635,7 @@
+       'ssh':            'BlockdevCreateOptionsSsh',
+       'vdi':            'BlockdevCreateOptionsVdi',
+       'vhdx':           'BlockdevCreateOptionsVhdx',
++      'vitastor':       'BlockdevCreateOptionsVitastor',
+       'vmdk':           'BlockdevCreateOptionsVmdk',
+       'vpc':            'BlockdevCreateOptionsVpc'
+   } }
+diff --git a/scripts/meson-buildoptions.sh b/scripts/meson-buildoptions.sh
+index 3d0d132344..65ee8c855e 100644
+--- a/scripts/meson-buildoptions.sh
++++ b/scripts/meson-buildoptions.sh
+@@ -177,6 +177,7 @@ meson_options_help() {
+   printf "%s\n" '  qga-vss         build QGA VSS support (broken with MinGW)'
+   printf "%s\n" '  qpl             Query Processing Library support'
+   printf "%s\n" '  rbd             Ceph block device driver'
++  printf "%s\n" '  vitastor        Vitastor block device driver'
+   printf "%s\n" '  rdma            Enable RDMA-based migration'
+   printf "%s\n" '  replication     replication support'
+   printf "%s\n" '  rust            Rust support'
+@@ -464,6 +465,8 @@ _meson_option_parse() {
+     --disable-qpl) printf "%s" -Dqpl=disabled ;;
+     --enable-rbd) printf "%s" -Drbd=enabled ;;
+     --disable-rbd) printf "%s" -Drbd=disabled ;;
++    --enable-vitastor) printf "%s" -Dvitastor=enabled ;;
++    --disable-vitastor) printf "%s" -Dvitastor=disabled ;;
+     --enable-rdma) printf "%s" -Drdma=enabled ;;
+     --disable-rdma) printf "%s" -Drdma=disabled ;;
+     --enable-relocatable) printf "%s" -Drelocatable=true ;;

rpm/qemu-kvm-10.1-el10.spec.patch

@@ -0,0 +1,91 @@
+--- qemu-kvm.spec.orig	2026-08-24 00:00:00.000000000 +0000
++++ qemu-kvm.spec	2026-09-05 16:48:22.226624885 +0000
+@@ -102,8 +102,6 @@
+ 
+ 
+ %global target_list %{kvm_target}-softmmu
+-%global block_drivers_rw_list qcow2,raw,file,host_device,nbd,iscsi,rbd,blkdebug,luks,null-co,nvme,copy-on-read,throttle,compress,virtio-blk-vhost-vdpa,virtio-blk-vfio-pci,virtio-blk-vhost-user,io_uring,nvme-io_uring
+-%global block_drivers_ro_list vdi,vmdk,vhdx,vpc,https
+ %define qemudocdir %{_docdir}/%{name}
+ %global firmwaredirs "%{_datadir}/qemu-firmware:%{_datadir}/ipxe/qemu:%{_datadir}/seavgabios:%{_datadir}/seabios"
+ 
+@@ -134,6 +132,7 @@ Requires: %{name}-block-blkio = %{epoch}
+ %if %{have_block_rbd} \
+ Requires: %{name}-block-rbd = %{epoch}:%{version}-%{release}     \
+ %endif \
++Requires: %{name}-block-vitastor = %{epoch}:%{version}-%{release}\
+ Requires: %{name}-audio-pa = %{epoch}:%{version}-%{release}
+ 
+ # Since SPICE is removed from RHEL-9, the following Obsoletes:
+@@ -158,7 +157,7 @@ Obsoletes: %{name}-block-ssh <= %{epoch}
+ Summary: QEMU is a machine emulator and virtualizer
+ Name: qemu-kvm
+ Version: 10.1.0
+-Release: 16%{?rcrel}%{?dist}%{?cc_suffix}.5.alma.1
++Release: 16.vitastor%{?rcrel}%{?dist}%{?cc_suffix}.5.alma.1
+ # Epoch because we pushed a qemu-1.0 package. AIUI this can't ever be dropped
+ # Epoch 15 used for RHEL 8
+ # Epoch 17 used for RHEL 9 (due to release versioning offset in RHEL 8.5)
+@@ -181,6 +180,7 @@ Source28: 95-kvm-memlock.conf
+ Source30: kvm-s390x.conf
+ Source31: kvm-x86.conf
+ Source36: README.tests
++Source37: qemu-vitastor.c
+ 
+ 
+ Patch0004: 0004-Initial-redhat-build.patch
+@@ -471,6 +471,7 @@ Patch149: kvm-file-posix-populate-pwrite
+ Patch150: kvm-block-use-pwrite_zeroes_alignment-when-writing-first.patch
+ # For RHEL-207389 - qemu-img create/convert fails on target block device with 4k sector size [rhel-10.2.z]
+ Patch151: kvm-iotests-add-Linux-loop-device-image-creation-test.patch
++Patch152: qemu-10.1-vitastor.patch
+ 
+ # AlmaLinux Patch
+ Patch2001: 2001-Add-ppc64-support.patch
+@@ -509,6 +510,7 @@ BuildRequires: libcurl-devel
+ %if %{have_block_rbd}
+ BuildRequires: librbd-devel
+ %endif
++BuildRequires: vitastor-client-devel
+ # We need both because the 'stap' binary is probed for by configure
+ BuildRequires: systemtap
+ BuildRequires: systemtap-sdt-devel
+@@ -729,6 +731,13 @@ using the rbd protocol.
+ %endif
+ 
+ 
++%package  block-vitastor
++Summary: QEMU Vitastor block driver
++Requires: %{name}-common%{?_isa} = %{epoch}:%{version}-%{release}
++%description block-vitastor
++This package provides the additional Vitastor block driver for QEMU.
++
++
+ %package  audio-pa
+ Summary: QEMU PulseAudio audio driver
+ Requires: %{name}-common%{?_isa} = %{epoch}:%{version}-%{release}
+@@ -831,6 +840,7 @@ This package provides the additional D-B
+ %prep
+ %setup -q -n qemu-%{version}%{?rcstr}
+ %autopatch -p1
++cp %{SOURCE37} ./block/vitastor.c
+ 
+ %global qemu_kvm_build qemu_kvm_build
+ mkdir -p %{qemu_kvm_build}
+@@ -1067,6 +1077,7 @@ run_configure \
+ %if %{have_block_rbd}
+   --enable-rbd \
+ %endif
++  --enable-vitastor \
+ %if %{have_librdma}
+   --enable-rdma \
+ %endif
+@@ -1564,6 +1575,8 @@ useradd -r -u 107 -g qemu -G kvm -d / -s
+ %files block-rbd
+ %{_libdir}/%{name}/block-rbd.so
+ %endif
++%files block-vitastor
++%{_libdir}/%{name}/block-vitastor.so
+ %files audio-pa
+ %{_libdir}/%{name}/audio-pa.so
+ 

rpm/vitastor-el10.Dockerfile

@@ -11,7 +11,10 @@ WORKDIR /root
 RUN sed -i 's/enabled=0/enabled=1/' /etc/yum.repos.d/*.repo
 RUN dnf -y install epel-release dnf-plugins-core
 RUN dnf -y install https://vitastor.io/rpms/centos/10/vitastor-release-1.0-1.el10.noarch.rpm
-RUN dnf -y install gcc-c++ gperftools-devel fio nodejs rpm-build jerasure-devel isa-l-devel gf-complete-devel rdma-core-devel cmake libnl3-devel c-ares-devel
+RUN sed -i 's/metalink=/#metalink=/' /etc/yum.repos.d/epel.repo
+RUN sed -i 's!#baseurl=.*epel/!baseurl=https://mirror.yandex.ru/epel/!' /etc/yum.repos.d/epel.repo
+RUN dnf -y install gcc-c++ gperftools-devel fio nodejs rpm-build jerasure-devel isa-l-devel openssl-devel libisa-l_crypto-devel \
+    gf-complete-devel rdma-core-devel cmake libnl3-devel c-ares-devel
 RUN dnf download --source fio
 RUN rpm --nomd5 -i fio*.src.rpm
 RUN cd ~/rpmbuild/SPECS && dnf builddep -y --spec fio.spec

rpm/vitastor-el10.spec

@@ -1,17 +1,18 @@
 Name:           vitastor
-Version:        3.0.5
+Version:        3.2.1
 Release:        1%{?dist}
 Summary:        Vitastor, a fast software-defined clustered block storage
 
 License:        Vitastor Network Public License 1.1
 URL:            https://vitastor.io/
-Source0:        vitastor-3.0.5.el10.tar.gz
+Source0:        vitastor-3.2.1.el10.tar.gz
 
 BuildRequires:  gperftools-devel
 BuildRequires:  gcc-c++
 BuildRequires:  nodejs >= 10
 BuildRequires:  jerasure-devel
 BuildRequires:  isa-l-devel
+BuildRequires:  libisa-l_crypto-devel
 BuildRequires:  gf-complete-devel
 BuildRequires:  rdma-core-devel
 BuildRequires:  cmake
@@ -161,6 +162,8 @@ chown vitastor:vitastor /var/lib/vitastor
 %_bindir/vitastor-nbd
 %_bindir/vitastor-ublk
 %_bindir/vitastor-nfs
+%_sbindir/mount.vitastorfs
+%_sbindir/mount.vitastorblk
 %_bindir/vitastor-cli
 %_bindir/vitastor-rm
 %_bindir/vitastor-kv

rpm/vitastor-el7.Dockerfile

@@ -13,9 +13,11 @@ RUN rm -f /etc/yum.repos.d/CentOS-Media.repo
 RUN sed -i 's/^mirrorlist=/#mirrorlist=/; s!#baseurl=http://mirror.centos.org/centos/\$releasever!baseurl=http://vault.centos.org/7.9.2009!' /etc/yum.repos.d/*.repo
 RUN yum -y --enablerepo=extras install centos-release-scl epel-release yum-utils rpm-build
 RUN perl -i -pe 's!mirrorlist=!#mirrorlist=!s; s!#\s*baseurl=http://mirror.centos.org!baseurl=http://vault.centos.org!' /etc/yum.repos.d/CentOS-SCLo-scl*.repo
-RUN yum -y install https://vitastor.io/rpms/centos/7/vitastor-release-1.0-1.el7.noarch.rpm
+RUN yum -y install https://vitastor.io/rpms/centos/7/vitastor-release-1.0-2.el7.noarch.rpm
+RUN sed -i 's/metalink=/#metalink=/' /etc/yum.repos.d/epel.repo
+RUN sed -i 's!#baseurl=.*epel/!baseurl=https://archives.fedoraproject.org/pub/archive/epel/!' /etc/yum.repos.d/epel.repo
 RUN yum -y install devtoolset-9-gcc-c++ devtoolset-9-libatomic-devel gcc make cmake gperftools-devel \
-    fio rh-nodejs12 jerasure-devel libisa-l-devel gf-complete-devel rdma-core-devel libnl3-devel c-ares-devel
+    fio rh-nodejs12 jerasure-devel libisa-l-devel openssl3-devel libisa-l_crypto-devel gf-complete-devel rdma-core-devel libnl3-devel c-ares-devel
 RUN yumdownloader --disablerepo=centos-sclo-rh --source fio
 RUN rpm --nomd5 -i fio*.src.rpm
 RUN rm -f /etc/yum.repos.d/CentOS-Media.repo

rpm/vitastor-el7.spec

@@ -1,23 +1,25 @@
 Name:           vitastor
-Version:        3.0.5
+Version:        3.2.1
 Release:        1%{?dist}
 Summary:        Vitastor, a fast software-defined clustered block storage
 
 License:        Vitastor Network Public License 1.1
 URL:            https://vitastor.io/
-Source0:        vitastor-3.0.5.el7.tar.gz
+Source0:        vitastor-3.2.1.el7.tar.gz
 
 BuildRequires:  gperftools-devel
 BuildRequires:  devtoolset-9-gcc-c++
 BuildRequires:  rh-nodejs12
 BuildRequires:  rh-nodejs12-npm
 BuildRequires:  jerasure-devel
+BuildRequires:  openssl3-devel
 BuildRequires:  libisa-l-devel
+BuildRequires:  libisa-l_crypto-devel
 BuildRequires:  gf-complete-devel
 BuildRequires:  rdma-core-devel
 BuildRequires:  cmake3
 BuildRequires:  libnl3-devel
-BuildRequires:  c-ares-devel
+BuildRequires:  c-ares-devel >= 1.16
 Requires:       vitastor-osd = %{version}-%{release}
 Requires:       vitastor-mon = %{version}-%{release}
 Requires:       vitastor-client = %{version}-%{release}
@@ -105,7 +107,7 @@ Vitastor storage plugin for OpenNebula.
 
 %build
 . /opt/rh/devtoolset-9/enable
-%cmake3 .
+%cmake3 . -DOPENSSL_CRYPTO_LIBRARY=%{_libdir}/openssl3/libcrypto.so -DOPENSSL_SSL_LIBRARY=%{_libdir}/openssl3/libssl.so -DOPENSSL_INCLUDE_DIR=%{_includedir}/openssl3
 %make_build
 
 
@@ -167,6 +169,8 @@ chown vitastor:vitastor /var/lib/vitastor
 %_bindir/vitastor-nbd
 %_bindir/vitastor-ublk
 %_bindir/vitastor-nfs
+%_sbindir/mount.vitastorfs
+%_sbindir/mount.vitastorblk
 %_bindir/vitastor-cli
 %_bindir/vitastor-rm
 %_bindir/vitastor-kv

rpm/vitastor-el8.Dockerfile

@@ -11,9 +11,11 @@ RUN rm -f /etc/yum.repos.d/CentOS-Media.repo
 RUN sed -i 's/^mirrorlist=/#mirrorlist=/; s!#baseurl=http://mirror.centos.org/!baseurl=http://vault.centos.org/!' /etc/yum.repos.d/*.repo
 RUN dnf -y install centos-release-advanced-virtualization epel-release dnf-plugins-core
 RUN sed -i 's/^mirrorlist=/#mirrorlist=/; s!#baseurl=.*!baseurl=http://vault.centos.org/centos/8.4.2105/virt/$basearch/$avdir/!; s!^baseurl=.*Source/.*!baseurl=http://vault.centos.org/centos/8.4.2105/virt/Source/advanced-virtualization/!' /etc/yum.repos.d/CentOS-Advanced-Virtualization.repo
-RUN yum -y install https://vitastor.io/rpms/centos/8/vitastor-release-1.0-1.el8.noarch.rpm
-RUN dnf -y install gcc-toolset-9 gcc-toolset-9-gcc-c++ gperftools-devel \
-    fio nodejs rpm-build jerasure-devel libisa-l-devel gf-complete-devel libibverbs-devel libarchive cmake libnl3-devel c-ares-devel
+RUN yum -y install https://vitastor.io/rpms/centos/8/vitastor-release-1.0-2.el8.noarch.rpm
+RUN sed -i 's/metalink=/#metalink=/' /etc/yum.repos.d/epel.repo
+RUN sed -i 's!#baseurl=.*epel/!baseurl=https://mirror.yandex.ru/epel/!' /etc/yum.repos.d/epel.repo
+RUN dnf -y install gcc-toolset-9 gcc-toolset-9-gcc-c++ gperftools-devel fio nodejs rpm-build jerasure-devel \
+    libisa-l-devel openssl3-devel libisa-l_crypto-devel gf-complete-devel libibverbs-devel libarchive cmake libnl3-devel c-ares-devel
 RUN dnf download --source fio
 RUN rpm --nomd5 -i fio*.src.rpm
 RUN cd ~/rpmbuild/SPECS && dnf builddep -y --enablerepo=powertools --spec fio.spec

rpm/vitastor-el8.spec

@@ -1,22 +1,24 @@
 Name:           vitastor
-Version:        3.0.5
+Version:        3.2.1
 Release:        1%{?dist}
 Summary:        Vitastor, a fast software-defined clustered block storage
 
 License:        Vitastor Network Public License 1.1
 URL:            https://vitastor.io/
-Source0:        vitastor-3.0.5.el8.tar.gz
+Source0:        vitastor-3.2.1.el8.tar.gz
 
 BuildRequires:  gperftools-devel
 BuildRequires:  gcc-toolset-9-gcc-c++
 BuildRequires:  nodejs >= 10
 BuildRequires:  jerasure-devel
+BuildRequires:  openssl3-devel
 BuildRequires:  libisa-l-devel
+BuildRequires:  libisa-l_crypto-devel
 BuildRequires:  gf-complete-devel
 BuildRequires:  rdma-core-devel
 BuildRequires:  cmake
 BuildRequires:  libnl3-devel
-BuildRequires:  c-ares-devel
+BuildRequires:  c-ares-devel >= 1.16
 Requires:       vitastor-osd = %{version}-%{release}
 Requires:       vitastor-mon = %{version}-%{release}
 Requires:       vitastor-client = %{version}-%{release}
@@ -103,7 +105,7 @@ Vitastor storage plugin for OpenNebula.
 
 %build
 . /opt/rh/gcc-toolset-9/enable
-%cmake .
+%cmake . -DOPENSSL_CRYPTO_LIBRARY=%{_libdir}/openssl3/libcrypto.so -DOPENSSL_SSL_LIBRARY=%{_libdir}/openssl3/libssl.so -DOPENSSL_INCLUDE_DIR=%{_includedir}/openssl3
 %make_build
 
 
@@ -164,6 +166,8 @@ chown vitastor:vitastor /var/lib/vitastor
 %_bindir/vitastor-nbd
 %_bindir/vitastor-ublk
 %_bindir/vitastor-nfs
+%_sbindir/mount.vitastorfs
+%_sbindir/mount.vitastorblk
 %_bindir/vitastor-cli
 %_bindir/vitastor-rm
 %_bindir/vitastor-kv

rpm/vitastor-el9.Dockerfile

@@ -10,7 +10,10 @@ WORKDIR /root
 RUN sed -i 's/enabled=0/enabled=1/' /etc/yum.repos.d/*.repo
 RUN dnf -y install epel-release dnf-plugins-core
 RUN dnf -y install https://vitastor.io/rpms/centos/9/vitastor-release-1.0-1.el9.noarch.rpm
-RUN dnf -y install gcc-c++ gperftools-devel fio nodejs rpm-build jerasure-devel libisa-l-devel gf-complete-devel rdma-core-devel libarchive cmake libnl3-devel c-ares-devel
+RUN sed -i 's/metalink=/#metalink=/' /etc/yum.repos.d/epel.repo
+RUN sed -i 's!#baseurl=.*epel/!baseurl=https://mirror.yandex.ru/epel/!' /etc/yum.repos.d/epel.repo
+RUN dnf -y install gcc-c++ gperftools-devel fio nodejs rpm-build jerasure-devel libisa-l-devel \
+    openssl-devel libisa-l_crypto-devel gf-complete-devel rdma-core-devel libarchive cmake libnl3-devel c-ares-devel
 RUN dnf download --source fio
 RUN rpm --nomd5 -i fio*.src.rpm
 RUN cd ~/rpmbuild/SPECS && dnf builddep -y --spec fio.spec

rpm/vitastor-el9.spec

@@ -1,22 +1,24 @@
 Name:           vitastor
-Version:        3.0.5
+Version:        3.2.1
 Release:        1%{?dist}
 Summary:        Vitastor, a fast software-defined clustered block storage
 
 License:        Vitastor Network Public License 1.1
 URL:            https://vitastor.io/
-Source0:        vitastor-3.0.5.el9.tar.gz
+Source0:        vitastor-3.2.1.el9.tar.gz
 
 BuildRequires:  gperftools-devel
 BuildRequires:  gcc-c++
 BuildRequires:  nodejs >= 10
 BuildRequires:  jerasure-devel
+BuildRequires:  openssl-devel
 BuildRequires:  libisa-l-devel
+BuildRequires:  libisa-l_crypto-devel
 BuildRequires:  gf-complete-devel
 BuildRequires:  rdma-core-devel
 BuildRequires:  cmake
 BuildRequires:  libnl3-devel
-BuildRequires:  c-ares-devel
+BuildRequires:  c-ares-devel >= 1.16
 Requires:       vitastor-osd = %{version}-%{release}
 Requires:       vitastor-mon = %{version}-%{release}
 Requires:       vitastor-client = %{version}-%{release}
@@ -161,6 +163,8 @@ chown vitastor:vitastor /var/lib/vitastor
 %_bindir/vitastor-nbd
 %_bindir/vitastor-ublk
 %_bindir/vitastor-nfs
+%_sbindir/mount.vitastorfs
+%_sbindir/mount.vitastorblk
 %_bindir/vitastor-cli
 %_bindir/vitastor-rm
 %_bindir/vitastor-kv

src/CMakeLists.txt

@@ -1,9 +1,8 @@
-cmake_minimum_required(VERSION 2.8.12)
+cmake_minimum_required(VERSION 2.8...3.30)
 
 project(vitastor)
 
 include(GNUInstallDirs)
-include(CTest)
 include(CheckIncludeFile)
 
 find_package(PkgConfig)
@@ -12,6 +11,7 @@ set(WITH_QEMU false CACHE BOOL "Build QEMU driver inside Vitastor source tree")
 set(WITH_FIO true CACHE BOOL "Build FIO driver")
 set(QEMU_PLUGINDIR qemu CACHE STRING "QEMU plugin directory suffix (qemu-kvm on RHEL)")
 set(WITH_ASAN false CACHE BOOL "Build with AddressSanitizer")
+set(WITH_UBSAN false CACHE BOOL "Build with UBSanitizer")
 set(WITH_SYSTEM_LIBURING false CACHE BOOL "Use system liburing")
 if("${CMAKE_INSTALL_PREFIX}" MATCHES "^/usr/local/?$")
 	if(EXISTS "/etc/debian_version")
@@ -21,13 +21,17 @@ if("${CMAKE_INSTALL_PREFIX}" MATCHES "^/usr/local/?$")
 endif()
 set(ENABLE_COVERAGE false CACHE BOOL "Enable code coverage")
 
-add_definitions(-DVITASTOR_VERSION="3.0.5")
+add_definitions(-DVITASTOR_VERSION="3.2.1")
 add_definitions(-D_GNU_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -Wall -Wno-sign-compare -Wno-comment -Wno-parentheses -Wno-pointer-arith -fdiagnostics-color=always -fno-omit-frame-pointer -fvisibility=hidden -I ${CMAKE_SOURCE_DIR}/src)
 add_link_options(-fno-omit-frame-pointer)
 if (${WITH_ASAN})
 	add_definitions(-fsanitize=address)
 	add_link_options(-fsanitize=address -fno-omit-frame-pointer)
 endif (${WITH_ASAN})
+if (${WITH_UBSAN})
+	add_definitions(-fsanitize=undefined -fno-sanitize=alignment)
+	add_link_options(-fsanitize=undefined -fno-sanitize=alignment)
+endif (${WITH_UBSAN})
 set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -fvisibility-inlines-hidden")
 set(CMAKE_CXX_FLAGS_MINSIZEREL "${CMAKE_CXX_FLAGS_MINSIZEREL} -fvisibility-inlines-hidden")
 set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO} -fvisibility-inlines-hidden")
@@ -51,9 +55,13 @@ string(REGEX REPLACE "([\\/\\-]D) *NDEBUG" "" CMAKE_C_FLAGS_RELEASE "${CMAKE_C_F
 string(REGEX REPLACE "([\\/\\-]D) *NDEBUG" "" CMAKE_C_FLAGS_MINSIZEREL "${CMAKE_C_FLAGS_MINSIZEREL}")
 string(REGEX REPLACE "([\\/\\-]D) *NDEBUG" "" CMAKE_C_FLAGS_RELWITHDEBINFO "${CMAKE_C_FLAGS_RELWITHDEBINFO}")
 
-macro(install_symlink filepath sympath)
-	install(CODE "execute_process(COMMAND ${CMAKE_COMMAND} -E create_symlink ${filepath} \$ENV{DESTDIR}${sympath})")
-	install(CODE "message(\"-- Created symlink: ${sympath} -> ${filepath}\")")
+macro(install_symlink _filepath _sympath)
+	get_filename_component(_symname ${_sympath} NAME)
+	get_filename_component(_installdir ${_sympath} PATH)
+	install(CODE "execute_process(COMMAND \"${CMAKE_COMMAND}\" -E create_symlink
+		${_filepath} ${CMAKE_CURRENT_BINARY_DIR}/${_symname}.link)")
+	install(FILES ${CMAKE_CURRENT_BINARY_DIR}/${_symname}.link DESTINATION ${_installdir} RENAME ${_symname})
+	install(CODE "file(REMOVE ${CMAKE_CURRENT_BINARY_DIR}/${_symname}.link)")
 endmacro(install_symlink)
 
 check_include_file("linux/nbd-netlink.h" HAVE_NBD_NETLINK_H)
@@ -70,17 +78,20 @@ pkg_check_modules(ISAL libisal)
 if (ISAL_LIBRARIES)
 	add_definitions(-DWITH_ISAL)
 endif (ISAL_LIBRARIES)
+pkg_check_modules(ISAL_CRYPTO libisal_crypto)
+if (ISAL_CRYPTO_LIBRARIES)
+	add_definitions(-DWITH_ISAL_CRYPTO)
+endif (ISAL_CRYPTO_LIBRARIES)
 pkg_check_modules(RDMACM librdmacm)
 if (RDMACM_LIBRARIES)
 	add_definitions(-DWITH_RDMACM)
 endif (RDMACM_LIBRARIES)
 
-find_package(OpenSSL REQUIRED)
-if (OPENSSL_FOUND)
-	add_definitions(-DWITH_OPENSSL)
-endif (OPENSSL_FOUND)
+find_package(OpenSSL 3.0 REQUIRED)
+add_definitions(-DWITH_OPENSSL)
+include_directories(${OPENSSL_INCLUDE_DIR})
 
-pkg_check_modules(CARES REQUIRED libcares)
+pkg_check_modules(CARES REQUIRED libcares>=1.16)
 include_directories(${CARES_INCLUDE_DIRS})
 
 if (${WITH_SYSTEM_LIBURING})
@@ -115,6 +126,7 @@ add_subdirectory(kv)
 add_subdirectory(nfs)
 add_subdirectory(osd)
 add_subdirectory(test)
+add_subdirectory(util)
 
 ### Install
 
@@ -122,6 +134,8 @@ install(TARGETS vitastor-osd vitastor-disk vitastor-nbd vitastor-ublk vitastor-n
 install_symlink(vitastor-disk ${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_BINDIR}/vitastor-dump-journal)
 install_symlink(vitastor-cli ${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_BINDIR}/vitastor-rm)
 install_symlink(vitastor-cli ${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_BINDIR}/vita)
+install_symlink(../${CMAKE_INSTALL_BINDIR}/vitastor-nfs ${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_SBINDIR}/mount.vitastorfs)
+install_symlink(../${CMAKE_INSTALL_BINDIR}/vitastor-nfs ${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_SBINDIR}/mount.vitastorblk)
 install(
 	TARGETS vitastor_client vitastor_kv
 	LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}

src/blockstore/CMakeLists.txt

@@ -1,10 +1,9 @@
-cmake_minimum_required(VERSION 2.8.12)
+cmake_minimum_required(VERSION 2.8...3.30)
 
 project(vitastor)
 
 # libvitastor_blk.a
 add_library(vitastor_blk STATIC
-	../util/allocator.cpp ../util/crc32c.c ../util/xxhash.c ../util/ringloop.cpp
 	multilist.cpp blockstore_heap.cpp blockstore_disk.cpp
 	blockstore.cpp blockstore_impl.cpp blockstore_init.cpp blockstore_open.cpp
 	blockstore_flush.cpp blockstore_read.cpp blockstore_stable.cpp blockstore_sync.cpp blockstore_write.cpp
@@ -12,10 +11,8 @@ add_library(vitastor_blk STATIC
 )
 target_compile_options(vitastor_blk PUBLIC -fPIC)
 target_link_libraries(vitastor_blk
-	${LIBURING_LIBRARIES}
-	${ISAL_LIBRARIES}
-	# for timerfd_manager
-	vitastor_common
+	util
+	crc32c
 )
 set_target_properties(vitastor_blk PROPERTIES VERSION ${VITASTOR_VERSION} SOVERSION 0)
 
@@ -23,9 +20,9 @@ if (${WITH_FIO})
 	# libfio_vitastor_blk.so
 	add_library(fio_vitastor_blk SHARED
 		fio_engine.cpp
-		../../json11/json11.cpp
 	)
 	target_link_libraries(fio_vitastor_blk
 		vitastor_blk
+		util
 	)
 endif (${WITH_FIO})

src/blockstore/blockstore.h

@@ -77,8 +77,11 @@ Output:
 - retval = number of bytes actually read/written or negative error number
   -EINVAL = invalid input parameters
   -ENOENT = requested object/version does not exist for reads
+  -EEXIST = requested version to write already exists
   -ENOSPC = no space left in the store for writes
-  -EDOM = checksum error.
+  -EAGAIN = temporary failure, operation should be retried (notably, writes may be retried
+    after stabilizing some journaled entries and freeing up journal space)
+  -EDOM = checksum error
 - version = the version actually read or written
 
 ## BS_OP_DELETE
@@ -90,7 +93,7 @@ Input:
 - version = requested version. Treated the same as with BS_OP_WRITE
 
 Output:
-- retval = 0 or negative error number (-EINVAL)
+- retval = 0 or negative error number (-EINVAL, -EAGAIN)
 - version = the version actually written (delete is initially written as an object version)
 
 ## BS_OP_SYNC
@@ -99,7 +102,7 @@ Make sure all previously issued modifications reach physical media.
 
 Input: Nothing except opcode
 Output:
-- retval = 0 or negative error number (-EINVAL)
+- retval = 0 or negative error number (-EINVAL, -EAGAIN)
 
 ## BS_OP_STABLE / BS_OP_ROLLBACK
 
@@ -129,7 +132,9 @@ Input:
 - max_oid = max inode/stripe or 0 to list all objects
 
 Output:
-- retval = total obj_ver_id count
+- retval = total obj_ver_id count or negative error number
+  -ENOMEM = could not allocate memory for the listing
+  -EAGAIN = pool sharding settings are incorrect, please reshard and retry
 - version = stable obj_ver_id count
 - buf = obj_ver_id array allocated by the blockstore. Stable versions come first.
   You must free it yourself after usage with free().
@@ -166,7 +171,7 @@ struct __attribute__ ((visibility("default"))) blockstore_op_t
     };
     uint8_t *buf = NULL;
     uint8_t *bitmap = NULL;
-    int retval = 0;
+    int64_t retval = 0;
 
     uint8_t private_data[BS_OP_PRIVATE_DATA_SIZE];
 };
@@ -228,4 +233,9 @@ public:
     virtual uint64_t get_journal_size() = 0;
 
     virtual uint32_t get_bitmap_granularity() = 0;
+
+    virtual uint64_t get_live_entries() = 0;
+    virtual uint64_t get_live_memory() = 0;
+    virtual uint64_t get_garbage_entries() = 0;
+    virtual uint64_t get_garbage_memory() = 0;
 };

src/blockstore/blockstore_disk.cpp

@@ -12,23 +12,9 @@
 #include "blockstore_disk.h"
 #include "blockstore_heap.h"
 #include "str_util.h"
+#include "disk_util.h"
 #include "allocator.h"
 
-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 blockstore_disk_t::parse_config(std::map<std::string, std::string> & config)
 {
     // Parse
@@ -98,6 +84,9 @@ void blockstore_disk_t::parse_config(std::map<std::string, std::string> & config
     csum_block_size = parse_size(config["csum_block_size"]);
     discard_on_start = config.find("discard_on_start") != config.end() &&
         (config["discard_on_start"] == "true" || config["discard_on_start"] == "1" || config["discard_on_start"] == "yes");
+    gc_on_start = config.find("gc_on_start") == config.end() ||
+        (config["gc_on_start"] == "true" || config["gc_on_start"] == "1" || config["gc_on_start"] == "yes");
+    skip_double_claim = (config["skip_double_claim"] == "true" || config["skip_double_claim"] == "1" || config["skip_double_claim"] == "yes");
     min_discard_size = parse_size(config["min_discard_size"]);
     if (!min_discard_size)
         min_discard_size = 1024*1024;
@@ -123,7 +112,7 @@ void blockstore_disk_t::parse_config(std::map<std::string, std::string> & config
     {
         data_block_size = (1 << DEFAULT_DATA_BLOCK_ORDER);
     }
-    if (is_power_of_two(data_block_size) >= 64 || data_block_size < MIN_DATA_BLOCK_SIZE || data_block_size >= MAX_DATA_BLOCK_SIZE)
+    if ((data_block_size & (data_block_size-1)) || data_block_size < MIN_DATA_BLOCK_SIZE || data_block_size >= MAX_DATA_BLOCK_SIZE)
     {
         throw std::runtime_error("Bad block size");
     }
@@ -221,6 +210,32 @@ void blockstore_disk_t::parse_config(std::map<std::string, std::string> & config
     }
 }
 
+// A metadata entry must fit into one metadata block; a large block_size with a small
+// csum_block_size otherwise inflates the entry past it and makes the callers divide by zero.
+static uint64_t entries_per_meta_block(uint64_t entry_size, uint64_t meta_block_size,
+    uint64_t data_block_size, uint32_t bitmap_granularity, uint32_t csum_block_size)
+{
+    if (entry_size && entry_size <= meta_block_size)
+    {
+        return meta_block_size / entry_size;
+    }
+    std::string msg = "Metadata entry size ("+std::to_string(entry_size)+" bytes) exceeds meta_block_size ("+
+        std::to_string(meta_block_size)+" bytes) with block_size="+std::to_string(data_block_size)+
+        ", bitmap_granularity="+std::to_string(bitmap_granularity);
+    if (csum_block_size)
+    {
+        msg += ", csum_block_size="+std::to_string(csum_block_size)+" ("+
+            std::to_string(data_block_size/csum_block_size)+" checksums per block)";
+    }
+    msg += ". Decrease block_size";
+    if (csum_block_size)
+    {
+        msg += ", increase csum_block_size";
+    }
+    msg += " or increase meta_block_size";
+    throw std::runtime_error(msg);
+}
+
 void blockstore_disk_t::calc_lengths(bool skip_meta_check)
 {
     // data
@@ -270,17 +285,20 @@ void blockstore_disk_t::calc_lengths(bool skip_meta_check)
     clean_entry_bitmap_size = (data_block_size / bitmap_granularity + 7) / 8;
     clean_dyn_size = clean_entry_bitmap_size*2 + (csum_block_size
         ? data_block_size/csum_block_size*(data_csum_type & 0xFF) : 0);
+    uint64_t entries_per_block = 0;
 recalc:
     if (meta_format == BLOCKSTORE_META_FORMAT_HEAP)
     {
-        uint32_t entries_per_block = meta_block_size / (sizeof(heap_big_write_t) + clean_dyn_size);
+        entries_per_block = entries_per_meta_block(sizeof(heap_big_write_t) + clean_dyn_size,
+            meta_block_size, data_block_size, bitmap_granularity, csum_block_size);
         min_meta_len = (block_count+entries_per_block-1) / entries_per_block * meta_block_size;
     }
     else if (meta_format == BLOCKSTORE_META_FORMAT_V1)
     {
         clean_entry_size = 24 /*sizeof(clean_disk_entry)*/ + 2*clean_entry_bitmap_size;
-        min_meta_len = (1 + (block_count - 1 + meta_block_size / clean_entry_size)
-            / (meta_block_size / clean_entry_size)) * meta_block_size;
+        entries_per_block = entries_per_meta_block(clean_entry_size, meta_block_size,
+            data_block_size, bitmap_granularity, 0);
+        min_meta_len = (1 + (block_count - 1 + entries_per_block) / entries_per_block) * meta_block_size;
         if (!skip_meta_check && meta_area_size < min_meta_len)
         {
 too_small:
@@ -292,7 +310,9 @@ too_small:
     {
         meta_format = BLOCKSTORE_META_FORMAT_V2;
         clean_entry_size = 24 /*sizeof(clean_disk_entry)*/ + clean_dyn_size + 4 /*entry_csum*/;
-        min_meta_len = (1 + (block_count - 1 + meta_block_size / clean_entry_size) / (meta_block_size / clean_entry_size)) * meta_block_size;
+        entries_per_block = entries_per_meta_block(clean_entry_size, meta_block_size,
+            data_block_size, bitmap_granularity, csum_block_size);
+        min_meta_len = (1 + (block_count - 1 + entries_per_block) / entries_per_block) * meta_block_size;
         if (!skip_meta_check && meta_area_size < min_meta_len)
         {
             if (!data_csum_type)
@@ -335,41 +355,6 @@ void blockstore_disk_t::check_lengths()
     }
 }
 
-// FIXME: Move to utils
-static void check_size(int fd, uint64_t *size, uint64_t *sectsize, std::string name)
-{
-    int sect;
-    struct stat st;
-    if (fstat(fd, &st) < 0)
-    {
-        throw std::runtime_error("Failed to stat "+name);
-    }
-    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)
-        {
-            throw std::runtime_error("Failed to get "+name+" size or block size: "+strerror(errno));
-        }
-        if (sectsize)
-        {
-            *sectsize = sect;
-        }
-    }
-    else
-    {
-        throw std::runtime_error(name+" is neither a file nor a block device");
-    }
-}
-
 static int bs_openmode(const std::string & mode)
 {
     if (mode == "directsync")
@@ -488,7 +473,7 @@ void blockstore_disk_t::open_journal()
         journal_fd = meta_fd;
         journal_device_sect = meta_device_sect;
         journal_device_size = 0;
-        if (journal_offset >= data_device_size)
+        if (journal_offset >= (meta_device_size > 0 ? meta_device_size : data_device_size))
         {
             throw std::runtime_error("journal_offset exceeds device size");
         }
@@ -518,7 +503,7 @@ void blockstore_disk_t::close_all()
 
 // Sadly DISCARD only works through ioctl(), but it seems to always block the device queue,
 // so it's not a big deal that we can only run it synchronously.
-int blockstore_disk_t::trim_data(std::function<bool(uint64_t)> is_free)
+int blockstore_disk_t::trim_data(std::function<bool(uint64_t)> is_used)
 {
     if (mock_mode)
     {
@@ -529,7 +514,7 @@ int blockstore_disk_t::trim_data(std::function<bool(uint64_t)> is_free)
     uint64_t discarded = 0;
     for (; i <= block_count; i++)
     {
-        if (i >= block_count || is_free(i))
+        if (i >= block_count || is_used(i))
         {
             if (i > j && (i-j)*data_block_size >= min_discard_size)
             {
@@ -542,17 +527,21 @@ int blockstore_disk_t::trim_data(std::function<bool(uint64_t)> is_free)
                     if (range[0] % discard_granularity)
                         range[0] = range[0] + discard_granularity - (range[0] % discard_granularity);
                     if (range[0] >= range[1])
-                        continue;
-                    range[1] -= range[0];
+                        range[1] = 0;
+                    else
+                        range[1] -= range[0];
                 }
-                r = ioctl(data_fd, BLKDISCARD, &range);
-                if (r != 0)
+                if (range[1] > 0)
                 {
-                    fprintf(stderr, "Failed to execute BLKDISCARD %ju+%ju on %s: %s (code %d)\n",
-                        range[0], range[1], data_device.c_str(), strerror(-r), r);
-                    return -errno;
+                    r = ioctl(data_fd, BLKDISCARD, &range);
+                    if (r != 0)
+                    {
+                        fprintf(stderr, "Failed to execute BLKDISCARD %ju+%ju on %s: %s (code %d)\n",
+                            range[0], range[1], data_device.c_str(), strerror(-r), r);
+                        return -errno;
+                    }
+                    discarded += range[1];
                 }
-                discarded += range[1];
             }
             j = i+1;
         }

src/blockstore/blockstore_disk.h

@@ -58,6 +58,10 @@ struct blockstore_disk_t
     bool inmemory_journal = true;
     // Data discard granularity and minimum size (for the sake of performance)
     bool discard_on_start = false;
+    // GC on start (new store)
+    bool gc_on_start = true;
+    // Skip double claim conflicts on start (new store, temporary until the bug is found)
+    bool skip_double_claim = false;
     uint64_t min_discard_size = 1024*1024;
     uint64_t discard_granularity = 0;
 
@@ -80,7 +84,7 @@ struct blockstore_disk_t
     void calc_lengths(bool skip_meta_check = false);
     void check_lengths();
     void close_all();
-    int trim_data(std::function<bool(uint64_t)> is_free);
+    int trim_data(std::function<bool(uint64_t)> is_used);
 
     inline uint64_t dirty_dyn_size(uint64_t offset, uint64_t len)
     {

src/blockstore/blockstore_flush.cpp

@@ -80,6 +80,16 @@ int journal_flusher_t::get_syncing_buffer()
     return syncing_buffer;
 }
 
+uint64_t journal_flusher_t::get_flushing_lsn(object_id oid)
+{
+    auto it = flushing.find(oid);
+    if (it == flushing.end())
+    {
+        return 0;
+    }
+    return it->second;
+}
+
 bool journal_flusher_t::is_active()
 {
     return active_flushers > 0;
@@ -96,6 +106,20 @@ void journal_flusher_t::release_trim()
     force_start--;
 }
 
+// Ask for an fsync. Used when a new entry depends on another not-yet-durable entry
+void journal_flusher_t::request_fsync()
+{
+    force_start++;
+    force_fsync++;
+    bs->ringloop->wakeup();
+}
+
+void journal_flusher_t::release_fsync()
+{
+    force_fsync--;
+    force_start--;
+}
+
 void journal_flusher_t::dump_diagnostics()
 {
     printf(
@@ -172,30 +196,40 @@ bool journal_flusher_co::loop()
     else if (wait_state == 17) 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;
+    else if (wait_state == 22) goto resume_22;
+    else if (wait_state == 23) goto resume_23;
+    else if (wait_state == 24) goto resume_24;
+    else if (wait_state == 25) goto resume_25;
+    else if (wait_state == 26) goto resume_26;
+    else if (wait_state == 27) goto resume_27;
+    else if (wait_state == 28) goto resume_28;
+    else if (wait_state == 29) goto resume_29;
+    else if (wait_state == 30) goto resume_30;
+    else if (wait_state == 31) goto resume_31;
 resume_0:
     wait_state = 0;
     wait_count = 0;
     cur_oid = {};
     res = bs->heap->get_next_compact(cur_oid);
-    // Advance fsynced_lsn every <journal_trim_interval> intent writes
-    if ((bs->intent_write_counter >= bs->journal_trim_interval) && co_id == 0)
+    if ((bs->intent_write_counter >= bs->journal_trim_interval || flusher->force_fsync > 0) && co_id == 0)
     {
+        // Advance fsynced_lsn every <journal_trim_interval> intent writes
         bs->intent_write_counter = 0;
 resume_17:
 resume_18:
 resume_19:
         if (!fsync_buffer(17))
             return false;
-resume_20:
-resume_21:
-        if (!trim_lsn(20))
+resume_29:
+resume_30:
+resume_31:
+        if (!trim_lsn(29))
             return false;
     }
     if (res == ENOENT && flusher->force_start > 0 && co_id == 0 &&
         (!bs->dsk.disable_journal_fsync || !bs->dsk.disable_meta_fsync || !bs->dsk.disable_data_fsync))
     {
+        // When under pressure, do an additional fsync to force entries to be marked compactable
         flusher->active_flushers++;
 resume_14:
 resume_15:
@@ -226,7 +260,6 @@ resume_16:
         }
         assert(false);
     }
-    flusher->flushing.insert(cur_oid);
 resume_1:
     wait_state = 1;
     should_repeat = false;
@@ -234,7 +267,6 @@ resume_1:
     if (!cur_obj)
     {
         // Object does not exist
-        flusher->flushing.erase(cur_oid);
         goto resume_0;
     }
     // Scan versions to flush
@@ -259,44 +291,83 @@ resume_1:
         if (wr->type() == BS_HEAP_SMALL_WRITE ||
             wr->type() == BS_HEAP_INTENT_WRITE && bs->dsk.csum_block_size > bs->dsk.bitmap_granularity)
         {
-            auto res = bs->prepare_read(read_vec, cur_obj, wr, 0, bs->dsk.data_block_size,
+            bs->prepare_read(read_vec, cur_obj, wr, 0, bs->dsk.data_block_size,
                 wr->type() == BS_HEAP_INTENT_WRITE && bs->dsk.csum_block_size > bs->dsk.bitmap_granularity && !bs->perfect_csum_update
                 ? COPY_BUF_SKIP_CSUM : 0);
-            if (res > 0)
-                copy_count++;
         }
     });
     if (!compact_info.compact_lsn)
     {
         // Flushing is aborted
-        flusher->flushing.erase(cur_oid);
         bs->heap->unlock_entry(cur_oid);
         goto resume_0;
     }
-    mem_or(new_bmp, compact_info.clean_wr->get_int_bitmap(bs->heap), bs->dsk.clean_entry_bitmap_size);
-    if (!bitmap_copied)
-    {
-        memcpy(new_ext_bmp, compact_info.clean_wr->get_ext_bitmap(bs->heap), bs->dsk.clean_entry_bitmap_size);
-        bitmap_copied = true;
-    }
-    if (bs->dsk.csum_block_size && bs->dsk.csum_block_size <= bs->dsk.bitmap_granularity)
-    {
-        memcpy(new_csums, compact_info.clean_wr->get_checksums(bs->heap), bs->dsk.data_block_size/bs->dsk.csum_block_size * (bs->dsk.data_csum_type & 0xFF));
-        for (size_t i = csum_copy.size(); i > 0; i--)
-        {
-            auto wr = csum_copy[i-1];
-            memcpy(new_csums + wr->small().offset/bs->dsk.csum_block_size*(bs->dsk.data_csum_type & 0xFF),
-                wr->get_checksums(bs->heap), wr->small().len/bs->dsk.csum_block_size*(bs->dsk.data_csum_type & 0xFF));
-        }
-        csum_copy.clear();
-    }
-    clean_loc = compact_info.clean_wr->big_location(bs->heap);
+    flusher->flushing[cur_oid] = compact_info.compact_lsn;
     flusher->active_flushers++;
-    if (bs->log_level > 10)
+    if (!compact_info.do_delete && compact_info.clean_wr->type() == BS_HEAP_BIG_INTENT &&
+        (!bs->dsk.csum_block_size || bs->dsk.csum_block_size > bs->dsk.bitmap_granularity))
     {
-        printf("Compacting %jx:%jx v%ju..v%ju / l%ju..l%ju (%d writes)\n", cur_oid.inode, cur_oid.stripe,
-            compact_info.clean_wr->version, compact_info.compact_version,
-            compact_info.clean_wr->lsn, compact_info.compact_lsn, copy_count);
+        // Compaction merges newer writes into the data block in place, which changes bytes that
+        // <clean_wr>'s checksums still describe. Reads never take those bytes from it, but the
+        // startup recheck does, and it can only skip the overwritten parts when a checksum block
+        // covers exactly one write granule. With a larger block an overwritten part poisons the
+        // checksum of the whole block, and with checksums disabled a big_intent still carries a
+        // single checksum of its whole extent - it's the only way to tell an unfinished in-place
+        // write from a finished one. Either way see blockstore_heap_t::recheck_verify().
+        // So make sure the entry is out of the recheck's scope by persisting completed_lsn first.
+        // It is below fsynced_lsn already - iterate_compaction() doesn't return anything above it
+resume_26:
+resume_27:
+resume_28:
+        if (!trim_lsn(26))
+            return false;
+    }
+    for (i = 0; i < read_vec.size(); i++)
+    {
+        if ((read_vec[i].copy_flags & COPY_BUF_JOURNAL) &&
+            !(read_vec[i].copy_flags & COPY_BUF_COALESCED))
+        {
+            copy_count++;
+        }
+    }
+    if (copy_count > 0 && !bs->dsk.disable_data_fsync)
+    {
+        init_fsync_data();
+    }
+    if (compact_info.do_delete)
+    {
+        if (bs->log_level > 10)
+        {
+            printf("Compacting %jx:%jx up to l%ju (delete)\n", cur_oid.inode, cur_oid.stripe, compact_info.compact_lsn);
+        }
+        clean_loc = UINT64_MAX;
+    }
+    else
+    {
+        if (bs->log_level > 10)
+        {
+            printf("Compacting %jx:%jx v%ju..v%ju / l%ju..l%ju (%d writes)\n", cur_oid.inode, cur_oid.stripe,
+                compact_info.clean_wr->version, compact_info.compact_version,
+                compact_info.clean_wr->lsn, compact_info.compact_lsn, copy_count);
+        }
+        mem_or(new_bmp, compact_info.clean_wr->get_int_bitmap(bs->heap), bs->dsk.clean_entry_bitmap_size);
+        if (!bitmap_copied)
+        {
+            memcpy(new_ext_bmp, compact_info.clean_wr->get_ext_bitmap(bs->heap), bs->dsk.clean_entry_bitmap_size);
+            bitmap_copied = true;
+        }
+        if (bs->dsk.csum_block_size && bs->dsk.csum_block_size <= bs->dsk.bitmap_granularity)
+        {
+            memcpy(new_csums, compact_info.clean_wr->get_checksums(bs->heap), bs->dsk.data_block_size/bs->dsk.csum_block_size * (bs->dsk.data_csum_type & 0xFF));
+            for (size_t i = csum_copy.size(); i > 0; i--)
+            {
+                auto wr = csum_copy[i-1];
+                memcpy(new_csums + wr->small().offset/bs->dsk.csum_block_size*(bs->dsk.data_csum_type & 0xFF),
+                    wr->get_checksums(bs->heap), wr->small().len/bs->dsk.csum_block_size*(bs->dsk.data_csum_type & 0xFF));
+            }
+            csum_copy.clear();
+        }
+        clean_loc = compact_info.clean_wr->big_location(bs->heap);
     }
     overwrite_start = overwrite_end = 0;
     if (read_vec.size() > 0)
@@ -336,6 +407,13 @@ resume_3:
     if (res == ENOENT || res == EDOM)
     {
         // Abort compaction
+abort_compact:
+        if (copy_count > 0 && !bs->dsk.disable_data_fsync)
+        {
+            cur_sync->member_count--;
+            if (cur_sync->member_count > 0)
+                bs->ringloop->wakeup();
+        }
         flusher->flushing.erase(cur_oid);
         bs->heap->unlock_entry(cur_oid);
         flusher->active_flushers--;
@@ -349,10 +427,7 @@ resume_4:
         if (res == ENOENT)
         {
             // Abort compaction
-            flusher->flushing.erase(cur_oid);
-            bs->heap->unlock_entry(cur_oid);
-            flusher->active_flushers--;
-            goto resume_0;
+            goto abort_compact;
         }
         if (res == EAGAIN)
         {
@@ -381,14 +456,14 @@ resume_9:
     for (i = 0; i < read_vec.size(); i++)
     {
         if ((read_vec[i].copy_flags & COPY_BUF_JOURNAL) &&
-            !(read_vec[i].copy_flags & COPY_BUF_COALESCED) ||
-            (read_vec[i].copy_flags & COPY_BUF_PADDED)) // FIXME Shit, simplify these flags
+            !(read_vec[i].copy_flags & COPY_BUF_COALESCED))
         {
             assert(read_vec[i].buf);
             await_sqe(10);
             data->iov = (struct iovec){ read_vec[i].buf + (read_vec[i].copy_flags & COPY_BUF_PADDED
                 ? read_vec[i].offset - read_vec[i].disk_offset : 0), (size_t)read_vec[i].len };
             data->callback = simple_callback_w;
+            assert(clean_loc + read_vec[i].offset + data->iov.iov_len <= bs->dsk.block_count*bs->dsk.data_block_size);
             io_uring_prep_writev(sqe, bs->dsk.data_fd, &data->iov, 1, bs->dsk.data_offset + clean_loc + read_vec[i].offset);
             wait_count++;
         }
@@ -399,6 +474,17 @@ resume_11:
         wait_state = 11;
         return false;
     }
+    if (copy_count > 0 && !bs->dsk.disable_data_fsync)
+    {
+resume_22:
+resume_23:
+resume_24:
+resume_25:
+        if (!fsync_data(22))
+        {
+            return false;
+        }
+    }
     // Lock is only needed to prevent freeing the big_write because we overwrite it...
     bs->heap->unlock_entry(cur_oid);
     // Mark the object compacted, but don't free and remove small_writes
@@ -408,12 +494,14 @@ resume_11:
     if (!cur_obj)
     {
         // Abort compaction
+        flusher->active_flushers--;
         flusher->flushing.erase(cur_oid);
         goto resume_0;
     }
     if (!calc_block_checksums())
     {
         // Abort compaction
+        flusher->active_flushers--;
         flusher->flushing.erase(cur_oid);
         goto resume_0;
     }
@@ -422,6 +510,7 @@ resume_11:
     if (res == EBUSY)
     {
         // Abort compaction, object is already overwritten by something else
+        flusher->active_flushers--;
         flusher->flushing.erase(cur_oid);
         goto resume_0;
     }
@@ -438,12 +527,12 @@ resume_13:
         printf("Compacted %jx:%jx l%ju (%d writes)\n", cur_oid.inode, cur_oid.stripe, compact_info.compact_lsn, copy_count);
     }
     flusher->active_flushers--;
+    flusher->flushing.erase(cur_oid);
     if (should_repeat)
     {
         // Flush the same object again
         goto resume_1;
     }
-    flusher->flushing.erase(cur_oid);
     // All done
     goto resume_0;
 }
@@ -489,7 +578,7 @@ void journal_flusher_co::fill_partial_checksum_blocks()
         }
         auto & vec = read_vec[read_vec.size()-1];
         read_vec.insert(read_vec.begin()+vec_pos, (copy_buffer_t){
-            .copy_flags = COPY_BUF_JOURNAL|COPY_BUF_COALESCED,
+            .copy_flags = COPY_BUF_DATA|COPY_BUF_COALESCED,
             .offset = hole_start,
             .len = hole_end - hole_start,
             .disk_offset = hole_start,
@@ -586,13 +675,13 @@ int journal_flusher_co::check_and_punch_checksums()
             bs->heap->calc_block_checksums((uint32_t*)(new_csums+csum_off), vec.buf, punch_bmp, vec.offset, vec.offset+vec.len, true, NULL);
         }
     }
-    // Modified, we should add_punch_holes and then write the block to disk
+    // Modified, we should punch_holes and then write the block to disk
     return EBUSY;
 }
 
 bool journal_flusher_co::calc_block_checksums()
 {
-    if (bs->dsk.csum_block_size <= bs->dsk.bitmap_granularity)
+    if (bs->dsk.csum_block_size <= bs->dsk.bitmap_granularity || compact_info.do_delete)
     {
         return true;
     }
@@ -664,9 +753,11 @@ bool journal_flusher_co::read_buffered(int wait_base)
     else if (wait_state == wait_base+1)
         goto resume_1;
     wait_count = 0;
-    if (bs->dsk.inmemory_journal && !read_to_fill_incomplete)
+    if (bs->dsk.inmemory_journal && bs->dsk.csum_block_size <= bs->dsk.bitmap_granularity)
     {
         // Happy path: nothing to read :)
+        // We may have to read intent writes to recalculate block checksums, so proceed
+        // even if read_to_fill_incomplete is false, but csum_block_size is > bitmap_granularity
         return true;
     }
     for (i = 0; i < read_vec.size(); i++)
@@ -699,6 +790,67 @@ resume_1:
     return true;
 }
 
+void journal_flusher_co::init_fsync_data()
+{
+    cur_sync = flusher->data_syncs.begin();
+    if (cur_sync == flusher->data_syncs.end() || cur_sync->ready_count > 0)
+    {
+        cur_sync = flusher->data_syncs.emplace(cur_sync);
+    }
+    cur_sync->member_count++;
+}
+
+bool journal_flusher_co::fsync_data(int wait_base)
+{
+    if (wait_state == wait_base)
+        goto resume_0;
+    else if (wait_state == wait_base+1)
+        goto resume_1;
+    else if (wait_state == wait_base+2)
+        goto resume_2;
+    else if (wait_state == wait_base+3)
+        goto resume_3;
+    cur_sync->ready_count++;
+resume_0:
+    if (cur_sync->ready_count < cur_sync->member_count)
+    {
+        wait_state = wait_base;
+        return false;
+    }
+    if (!cur_sync->sent)
+    {
+        // Sync batch is ready. Do it.
+        await_sqe(1);
+        data->iov = { 0 };
+        data->callback = simple_callback_w;
+        io_uring_prep_fsync(sqe, bs->dsk.data_fd, IORING_FSYNC_DATASYNC);
+        cur_sync->sent = true;
+        wait_count++;
+resume_2:
+        if (wait_count > 0)
+        {
+            wait_state = wait_base+2;
+            return false;
+        }
+        cur_sync->done = true;
+        // Wake up other flushers
+        bs->ringloop->wakeup();
+    }
+resume_3:
+    if (!cur_sync->done)
+    {
+        wait_state = wait_base+3;
+        return false;
+    }
+    cur_sync->done_count++;
+    if (cur_sync->done_count >= cur_sync->member_count)
+    {
+        flusher->data_syncs.erase(cur_sync);
+        cur_sync = flusher->data_syncs.end();
+    }
+    return true;
+}
+
 bool journal_flusher_co::fsync_meta(int wait_base)
 {
     if (wait_state == wait_base)        goto resume_0;
@@ -774,27 +926,40 @@ bool journal_flusher_co::trim_lsn(int wait_base)
 {
     if (wait_state == wait_base)        goto resume_0;
     else if (wait_state == wait_base+1) goto resume_1;
+    else if (wait_state == wait_base+2) goto resume_2;
+resume_0:
+    if (flusher->trimming_lsn)
+    {
+        // Allow only one coroutine to update the superblock at a time to prevent parallel
+        // block updates or the device may in theory apply them in any order.
+        wait_state = wait_base;
+        return false;
+    }
     fsynced_lsn = bs->heap->get_fsynced_lsn();
     if (((blockstore_meta_header_v3_t*)bs->meta_superblock)->completed_lsn == fsynced_lsn)
     {
         return true;
     }
+    flusher->trimming_lsn = true;
     flusher->active_flushers++;
     ((blockstore_meta_header_v3_t*)bs->meta_superblock)->completed_lsn = fsynced_lsn;
     ((blockstore_meta_header_v3_t*)bs->meta_superblock)->set_crc32c();
-    await_sqe(0);
+    await_sqe(1);
     data->iov = (struct iovec){ bs->meta_superblock, (size_t)bs->dsk.meta_block_size };
     data->callback = simple_callback_w;
     io_uring_prep_writev(sqe, bs->dsk.meta_fd, &data->iov, 1, bs->dsk.meta_offset);
     // Update superblock with datasync
     sqe->rw_flags = RWF_DSYNC;
     wait_count++;
-resume_1:
+resume_2:
     if (wait_count > 0)
     {
-        wait_state = wait_base+1;
+        wait_state = wait_base+2;
         return false;
     }
+    // Superblock is updated, resume everyone who was waiting for it
+    flusher->trimming_lsn = false;
+    bs->ringloop->wakeup();
     flusher->active_flushers--;
     return true;
 }

src/blockstore/blockstore_flush.h

@@ -25,6 +25,15 @@ struct flusher_meta_write_t
     std::map<uint64_t, meta_sector_t>::iterator it;
 };
 
+struct flusher_data_sync_t
+{
+    int member_count = 0;
+    int ready_count = 0;
+    int done_count = 0;
+    bool sent = false;
+    bool done = false;
+};
+
 class journal_flusher_t;
 
 // Journal flusher coroutine
@@ -58,6 +67,7 @@ class journal_flusher_co
     int i, res;
     bool read_to_fill_incomplete;
     int copy_count;
+    std::list<flusher_data_sync_t>::iterator cur_sync;
 
     friend class journal_flusher_t;
 
@@ -68,6 +78,8 @@ class journal_flusher_co
     bool calc_block_checksums();
     bool write_meta_block(int wait_base);
     bool read_buffered(int wait_base);
+    void init_fsync_data();
+    bool fsync_data(int wait_base);
     bool fsync_meta(int wait_base);
     bool fsync_buffer(int wait_base);
     bool trim_lsn(int wait_base);
@@ -81,24 +93,30 @@ public:
 class journal_flusher_t
 {
     int force_start = 0;
+    int force_fsync = 0;
     int min_flusher_count = 0, max_flusher_count = 0, cur_flusher_count = 0, target_flusher_count = 0;
     journal_flusher_co *co;
     blockstore_impl_t *bs;
     friend class journal_flusher_co;
 
-    robin_hood::unordered_flat_set<object_id> flushing;
+    robin_hood::unordered_flat_map<object_id, uint64_t> flushing;
     int active_flushers = 0;
+    std::list<flusher_data_sync_t> data_syncs;
     int wanting_meta_fsync = 0;
     bool fsyncing_meta = false;
     int syncing_buffer = 0;
+    bool trimming_lsn = false;
 
 public:
     journal_flusher_t(blockstore_impl_t *bs);
     ~journal_flusher_t();
     void loop();
     int get_syncing_buffer();
+    uint64_t get_flushing_lsn(object_id oid);
     bool is_active();
     void request_trim();
     void release_trim();
+    void request_fsync();
+    void release_fsync();
     void dump_diagnostics();
 };

src/blockstore/blockstore_heap.h

@@ -57,11 +57,11 @@ struct __attribute__((__packed__)) heap_entry_t
     inline heap_small_write_t& small() { return *(heap_small_write_t*)this; }
     inline heap_big_write_t& big() { return *(heap_big_write_t*)this; }
     inline heap_big_intent_t& big_intent() { return *(heap_big_intent_t*)this; }
-    bool is_garbage();
+    bool is_garbage() const;
     void set_garbage();
-    bool is_overwrite();
-    bool is_compactable();
-    bool is_before(heap_entry_t *other);
+    bool is_overwrite() const;
+    bool is_compactable() const;
+    bool is_before(const heap_entry_t *other) const;
     uint32_t get_size(blockstore_heap_t *heap);
     uint8_t *get_ext_bitmap(blockstore_heap_t *heap);
     uint8_t *get_int_bitmap(blockstore_heap_t *heap);
@@ -118,10 +118,13 @@ struct heap_object_mvcc_t
 
 struct heap_block_info_t
 {
-    uint32_t used_space = 0;
+    struct __attribute__((__packed__))
+    {
+        uint32_t used_space = 0;
+        uint32_t garbage_space = 0;
+    };
     uint64_t mod_lsn = 0, mod_lsn_to = 0; // only 1 block write of LSN sequence is allowed at a moment
-    bool is_writing: 1;
-    bool has_garbage: 1;
+    bool is_writing = false;
     std::vector<heap_list_item_t*> entries;
 };
 
@@ -156,6 +159,19 @@ struct heap_li_equal
     }
 };
 
+struct heap_recheck_state_t
+{
+    heap_entry_t *obj = NULL;
+    heap_entry_t *next_wr = NULL;
+    size_t total_reads = 0;
+    size_t sent_reads = 0;
+    size_t checked_reads = 0;
+    heap_entry_t *bad_wr = NULL;
+    // The oldest entry a read was issued for. Everything below it is unverified, so if it
+    // turns out to be bad the object has to be looked at again after dropping it
+    heap_entry_t *oldest_wr = NULL;
+};
+
 using i64hash_t = robin_hood::hash<uint64_t>;
 using heap_inode_map_t = robin_hood::unordered_flat_set<heap_list_item_t*, heap_li_hash, heap_li_equal, 88>;
 using heap_block_index_t = robin_hood::unordered_flat_map<uint64_t,
@@ -185,6 +201,11 @@ class blockstore_heap_t
     uint64_t buffer_area_used_space = 0;
     uint64_t data_used_space = 0;
 
+    uint64_t live_entries = 0;
+    uint64_t live_memory = 0;
+    uint64_t garbage_entries = 0;
+    uint64_t garbage_memory = 0;
+
     uint64_t next_lsn = 0;
     uint32_t last_allocated_block = UINT32_MAX;
     heap_mvcc_map_t object_mvcc;
@@ -201,34 +222,48 @@ class blockstore_heap_t
 
     bool marked_used_blocks = false;
     bool recheck_queue_filled = false;
-    std::vector<heap_list_item_t*> loaded_list_items;
+    std::vector<heap_list_item_t*> postponed_items;
+    std::vector<heap_list_item_t*> init_erase_items;
     std::set<uint32_t> recheck_modified_blocks;
     std::deque<heap_entry_t*> recheck_queue;
+    std::map<heap_entry_t*, heap_recheck_state_t> recheck_states;
+    size_t recheck_pending_reads = 0;
     int recheck_in_progress = 0;
     bool in_recheck = false;
-    std::function<void(bool is_data, uint64_t offset, uint64_t len, uint8_t* buf, std::function<void()>)> recheck_cb;
+    std::function<void(bool is_data, uint64_t offset, uint64_t len, std::function<void(uint8_t*)>)> recheck_cb;
     int recheck_queue_depth = 0;
 
     uint64_t get_pg_id(inode_t inode, uint64_t stripe);
     bool validate_object(heap_entry_t *obj);
     void fill_recheck_queue();
+    void recheck_requeue(object_id oid);
+    void recheck_drop_entries(heap_entry_t *obj, heap_entry_t *bad_wr);
+    int recheck_start_reads(heap_recheck_state_t *st);
     int mark_used_blocks();
+    void init_free_bad_entry(heap_entry_t *wr);
+    void init_erase_bad_entry(heap_list_item_t *li);
+    bool init_erase_double_claim(heap_list_item_t *prev_li, heap_list_item_t *cur_li);
+    void recheck_full_gc();
     void recheck_buffer(heap_entry_t *cwr, uint8_t *buf);
     void defragment_block(uint32_t block_num);
     void reshard_add(heap_reshard_state_t *st, heap_list_item_t *li);
 
     void gc_block(heap_block_info_t & inf);
-    int allocate_entry(uint32_t entry_size, uint32_t *block_num, bool allow_last_free);
-    void insert_list_item(heap_list_item_t *li);
-    int add_entry(uint32_t wr_size, uint32_t *modified_block, bool allow_last_free,
-        bool explicit_complete, std::function<void(heap_entry_t *wr)> fill_entry);
-    int add_simple(heap_entry_t *obj, uint64_t version, uint32_t *modified_block, uint32_t entry_type);
+    int allocate_entry(uint32_t entry_size, uint32_t *block_num, bool allow_last_free, uint32_t prefer_block);
+    void insert_list_items(heap_list_item_t** v, size_t count, bool postpone);
+    void unlink_list_item(heap_list_item_t *li);
+    int add_entry(uint32_t wr_size, heap_entry_t *prev_obj, uint32_t *modified_block, bool prefer_same,
+        bool allow_last_free, bool explicit_complete, std::function<void(heap_entry_t *wr)> fill_entry);
+    int add_simple(heap_entry_t *obj, uint64_t version, uint32_t *modified_block, uint32_t entry_type, bool prefer_same);
     uint32_t meta_alloc_pos(const heap_block_info_t & inf);
     void modify_alloc(uint32_t block_num, std::function<void(heap_block_info_t &)> change_cb);
     void mark_garbage_up_to(heap_entry_t *wr);
-    void mark_garbage(uint32_t block_num, heap_entry_t *prev_wr, uint32_t used_big);
+    void mark_garbage(uint32_t block_num, heap_entry_t *prev_wr, uint32_t used_big, uint32_t keep_big);
     void push_inflight_lsn(uint64_t lsn, heap_entry_t *wr, uint64_t flags);
     void mark_completed_lsns(uint64_t mod_lsn);
+    heap_entry_t *skip_commits(heap_entry_t *wr);
+    int count_recheck_entries(heap_entry_t *obj, bool & need_data);
+    bool recheck_verify(heap_recheck_state_t *st, heap_entry_t *wr, uint8_t *buf);
     void apply_inflight(heap_inflight_lsn_t & inflight);
 public:
     blockstore_heap_t(blockstore_disk_t *dsk, uint8_t *buffer_area, int log_level = 0);
@@ -246,7 +281,7 @@ public:
     // before finishing initialization if not R/O
     std::vector<uint32_t> get_recheck_modified_blocks();
     // recheck small write data after reading the database from disk
-    bool recheck_small_writes(std::function<void(bool is_data, uint64_t offset, uint64_t len, uint8_t* buf, std::function<void()>)> read_buffer, int queue_depth);
+    bool recheck_small_writes(std::function<void(bool is_data, uint64_t offset, uint64_t len, std::function<void(uint8_t* buf)>)> read_buffer, int queue_depth);
     int finish_recheck();
     // reshard database according to the pool's PG count
     void* reshard_start(pool_id_t pool, uint32_t pg_count, uint32_t pg_stripe_size, uint64_t chunk_limit);
@@ -334,7 +369,7 @@ public:
 
     // get metadata block data buffer and used space
     void get_meta_block(uint32_t block_num, uint8_t *buffer);
-    void fill_block_empty_space(uint8_t *buffer, uint32_t pos);
+    void fill_block_empty_space(uint8_t *buffer, uint64_t pos);
     uint32_t get_meta_block_used_space(uint32_t block_num);
 
     // get space usage statistics
@@ -346,6 +381,10 @@ public:
     uint32_t get_compact_queue_size();
     uint32_t get_to_compact_count();
     uint64_t get_compacted_count();
+    uint64_t get_live_entries();
+    uint64_t get_live_memory();
+    uint64_t get_garbage_entries();
+    uint64_t get_garbage_memory();
 
     uint64_t entry_pos(uint32_t block_num, uint32_t offset);
     heap_entry_t *entry_from_pos(uint64_t entry_pos, bool allow_unallocated = false);

src/blockstore/blockstore_impl.cpp

@@ -43,6 +43,24 @@ blockstore_impl_t::blockstore_impl_t(blockstore_config_t & config, ring_loop_i *
 
 blockstore_impl_t::~blockstore_impl_t()
 {
+    // Operations which were queued or in flight when we were destroyed still have their
+    // private state constructed, and a read also owns its read vector. Nobody is going to
+    // complete them now, so release it here
+    for (auto op: submit_queue)
+        if (op)
+            PRIV(op)->~blockstore_op_private_t();
+    submit_queue.clear();
+    for (auto op: reads_in_flight)
+    {
+        free_read_buffers(PRIV(op)->read_vec);
+        PRIV(op)->~blockstore_op_private_t();
+    }
+    reads_in_flight.clear();
+    // Metadata block buffers are normally freed by the write completion callback,
+    // so anything still here was queued or in flight when we were destroyed
+    for (auto & mb: modified_blocks)
+        free(mb.second.buf);
+    modified_blocks.clear();
     if (flusher)
         delete flusher;
     if (heap)
@@ -101,6 +119,7 @@ void blockstore_impl_t::loop()
         unsigned initial_ring_space = ringloop->space_left();
         int op_idx = 0, new_idx = 0;
         bool has_unfinished_writes = false;
+        bool has_unfinished_sync = false;
         for (; op_idx < submit_queue.size(); op_idx++, new_idx++)
         {
             auto op = submit_queue[op_idx];
@@ -138,7 +157,13 @@ void blockstore_impl_t::loop()
             else if (op->opcode == BS_OP_SYNC)
             {
                 // syncs only completed writes, so doesn't have to be blocked by anything
-                wr_st = continue_sync(op);
+                if (!has_unfinished_sync)
+                {
+                    wr_st = continue_sync(op);
+                    has_unfinished_sync = (wr_st != 2);
+                }
+                else
+                    wr_st = 0;
             }
             else if (op->opcode == BS_OP_STABLE || op->opcode == BS_OP_ROLLBACK)
             {
@@ -154,9 +179,7 @@ void blockstore_impl_t::loop()
                     wr_st = 2;
                 }
                 else
-                {
                     wr_st = 0;
-                }
             }
             if (wr_st == 2)
             {
@@ -263,6 +286,19 @@ void blockstore_impl_t::check_wait(blockstore_op_t *op)
         flusher->release_trim();
         PRIV(op)->wait_for = 0;
     }
+    else if (PRIV(op)->wait_for == WAIT_META_FSYNC)
+    {
+        if (heap->get_fsynced_lsn() < PRIV(op)->wait_detail)
+        {
+            // do not submit
+#ifdef BLOCKSTORE_DEBUG
+            printf("Still waiting for LSN %ju to become durable\n", PRIV(op)->wait_detail);
+#endif
+            return;
+        }
+        flusher->release_fsync();
+        PRIV(op)->wait_for = 0;
+    }
     else
     {
         throw std::runtime_error("BUG: op->wait_for value is unexpected");
@@ -340,7 +376,7 @@ void blockstore_impl_t::process_list(blockstore_op_t *op)
         std::sort(result, result + stable_count);
         if (stable_count > op->list_stable_limit)
         {
-            memmove(result + op->list_stable_limit, result + stable_count, unstable_count);
+            memmove(result + op->list_stable_limit, result + stable_count, unstable_count*sizeof(obj_ver_id));
             stable_count = op->list_stable_limit;
         }
     }

src/blockstore/blockstore_impl.h

@@ -9,12 +9,9 @@
 #include "ondisk_formats.h"
 
 #include <sys/types.h>
-#include <sys/ioctl.h>
 #include <sys/stat.h>
-#include <fcntl.h>
 #include <time.h>
 #include <unistd.h>
-#include <linux/fs.h>
 
 #include <vector>
 #include <list>
@@ -42,7 +39,7 @@ struct blockstore_op_private_t
     int op_state;
 
     // Write, sync, stabilize
-    uint32_t modified_block, modified_block2;
+    uint32_t modified_block;
 
     // Read
     std::vector<copy_buffer_t> read_vec;
@@ -55,7 +52,9 @@ struct blockstore_op_private_t
     uint32_t write_type;
 
     // Stabilize, rollback
-    int stab_pos;
+    heap_entry_t *obj;
+    int stab_pos, res;
+    uint32_t modified_block2;
 
     // Write
     timespec tv_begin;
@@ -109,6 +108,9 @@ public:
     uint8_t* meta_superblock = NULL;
     uint8_t *buffer_area = NULL;
     std::vector<blockstore_op_t*> submit_queue;
+    // Reads waiting for their disk requests. They're out of submit_queue already, but we
+    // still own their private state, including the read vector - see the destructor
+    robin_hood::unordered_flat_set<blockstore_op_t*> reads_in_flight;
     int unsynced_data_write_count = 0, unsynced_buffer_write_count = 0, unsynced_meta_write_count = 0;
     int unsynced_queued_ops = 0;
 
@@ -117,9 +119,12 @@ public:
 
     journal_flusher_t *flusher;
     int write_iodepth = 0;
-    int inflight_big = 0;
     int intent_write_counter = 0;
-    bool fsyncing_data = false;
+    uint64_t data_fsync_next = 0;
+    uint64_t data_fsync_cur = 0;
+    uint64_t data_fsync_sent = 0;
+    uint64_t data_fsync_done = 0;
+    std::deque<bool> data_fsyncs;
 
     bool live = false, queue_stall = false;
     ring_loop_i *ringloop = NULL;
@@ -229,4 +234,9 @@ public:
     uint64_t get_free_block_count();
     inline uint32_t get_bitmap_granularity() { return dsk.bitmap_granularity; }
     inline uint64_t get_journal_size() { return dsk.journal_len; }
+
+    inline uint64_t get_live_entries() { return heap->get_live_entries(); }
+    inline uint64_t get_live_memory() { return heap->get_live_memory(); }
+    inline uint64_t get_garbage_entries() { return heap->get_garbage_entries(); }
+    inline uint64_t get_garbage_memory() { return heap->get_garbage_memory(); }
 };

src/blockstore/blockstore_init.cpp

@@ -10,7 +10,6 @@
 #define INIT_META_EMPTY 0
 #define INIT_META_READING 1
 #define INIT_META_READ_DONE 2
-#define INIT_META_WRITING 3
 
 #define GET_SQE() \
     sqe = bs->get_sqe();\
@@ -18,19 +17,34 @@
         throw std::runtime_error("io_uring is full during initialization");\
     data = ((ring_data_t*)sqe->user_data)
 
+struct blockstore_recheck_io_t
+{
+    bool is_data;
+    uint64_t offset;
+    uint64_t len;
+    uint8_t *buf;
+    std::function<void(uint8_t *buf)> cb;
+
+    blockstore_recheck_io_t(bool is_data, uint64_t offset, uint64_t len, std::function<void(uint8_t *buf)>&& cb):
+        is_data(is_data), offset(offset), len(len), buf(NULL), cb(std::move(cb))
+    {
+    }
+};
+
 blockstore_init_meta::blockstore_init_meta(blockstore_impl_t *bs)
 {
     this->bs = bs;
 }
 
-void blockstore_init_meta::handle_event(ring_data_t *data, int buf_num)
+void blockstore_init_meta::handle_event(ring_data_t *data, int buf_num, const char *op)
 {
-    if (data->res < 0)
+    if (data->res != data->iov.iov_len)
     {
-        throw std::runtime_error(
-            std::string("read metadata failed at offset ") + std::to_string(buf_num >= 0 ? bufs[buf_num].offset : last_read_offset) +
-            std::string(": ") + strerror(-data->res)
-        );
+        throw std::runtime_error(strprintf(
+            "%s failed at offset %ju: got %s (code %d), but expected %zu",
+            op, (buf_num >= 0 ? bufs[buf_num].offset : last_read_offset), strerror(-data->res),
+            data->res, data->iov.iov_len
+        ));
     }
     if (buf_num >= 0)
     {
@@ -60,7 +74,7 @@ int blockstore_init_meta::loop()
     GET_SQE();
     last_read_offset = 0;
     data->iov = { bs->meta_superblock, (size_t)bs->dsk.meta_block_size };
-    data->callback = [this](ring_data_t *data) { handle_event(data, -1); };
+    data->callback = [this](ring_data_t *data) { handle_event(data, -1, "read metadata header"); };
     io_uring_prep_readv(sqe, bs->dsk.meta_fd, &data->iov, 1, bs->dsk.meta_offset);
     bs->ringloop->submit();
     submitted++;
@@ -72,25 +86,19 @@ resume_1:
     }
     if (is_zero((uint64_t*)bs->meta_superblock, bs->dsk.meta_block_size))
     {
-        {
-            blockstore_meta_header_v3_t *hdr = (blockstore_meta_header_v3_t *)bs->meta_superblock;
-            hdr->zero = 0;
-            hdr->magic = BLOCKSTORE_META_MAGIC_V1;
-            hdr->version = bs->dsk.meta_format;
-            hdr->meta_block_size = bs->dsk.meta_block_size;
-            hdr->data_block_size = bs->dsk.data_block_size;
-            hdr->bitmap_granularity = bs->dsk.bitmap_granularity;
-            if (bs->dsk.meta_format >= BLOCKSTORE_META_FORMAT_V2)
-            {
-                hdr->data_csum_type = bs->dsk.data_csum_type;
-                hdr->csum_block_size = bs->dsk.csum_block_size;
-            }
-            if (bs->dsk.meta_format >= BLOCKSTORE_META_FORMAT_HEAP)
-            {
-                hdr->meta_area_size = bs->dsk.meta_area_size;
-            }
-            hdr->set_crc32c();
-        }
+        assert(bs->dsk.meta_format == BLOCKSTORE_META_FORMAT_HEAP);
+        blockstore_meta_header_v3_t *hdr = (blockstore_meta_header_v3_t *)bs->meta_superblock;
+        hdr->zero = 0;
+        hdr->magic = BLOCKSTORE_META_MAGIC_V1;
+        hdr->version = bs->dsk.meta_format;
+        hdr->meta_block_size = bs->dsk.meta_block_size;
+        hdr->data_block_size = bs->dsk.data_block_size;
+        hdr->bitmap_granularity = bs->dsk.bitmap_granularity;
+        hdr->completed_lsn = 0;
+        hdr->data_csum_type = bs->dsk.data_csum_type;
+        hdr->csum_block_size = bs->dsk.csum_block_size;
+        hdr->meta_area_size = bs->dsk.meta_area_size;
+        hdr->set_crc32c();
         if (bs->readonly)
         {
             printf("Skipping metadata initialization because blockstore is readonly\n");
@@ -98,21 +106,8 @@ resume_1:
         else
         {
             printf("Initializing metadata area\n");
-            GET_SQE();
-            last_read_offset = 0;
-            data->iov = (struct iovec){ bs->meta_superblock, (size_t)bs->dsk.meta_block_size };
-            data->callback = [this](ring_data_t *data) { handle_event(data, -1); };
-            io_uring_prep_writev(sqe, bs->dsk.meta_fd, &data->iov, 1, bs->dsk.meta_offset);
-            bs->ringloop->submit();
-            submitted++;
-        resume_2:
-            if (submitted > 0)
-            {
-                wait_state = 2;
-                return 1;
-            }
-            zero_on_init = true;
         }
+        zero_on_init = true;
     }
     else
     {
@@ -153,9 +148,17 @@ resume_1:
             );
             exit(1);
         }
+        uint32_t csum = hdr->header_csum;
+        hdr->header_csum = 0;
+        if (crc32c(0, hdr, sizeof(*hdr)) != csum)
+        {
+            printf("Metadata header is corrupt (checksum mismatch).\n");
+            exit(1);
+        }
+        hdr->header_csum = csum;
     }
     bs->heap->start_load(((blockstore_meta_header_v3_t *)bs->meta_superblock)->completed_lsn);
-    if (bs->dsk.inmemory_journal)
+    if (bs->dsk.inmemory_journal && !zero_on_init)
     {
         // Read buffer area
         printf("Reading buffered data\n");
@@ -167,7 +170,7 @@ resume_1:
                 bs->buffer_area + md_offset,
                 (size_t)(bs->dsk.journal_len - md_offset < bs->metadata_buf_size ? bs->dsk.journal_len - md_offset : bs->metadata_buf_size),
             };
-            data->callback = [this](ring_data_t *data) { handle_event(data, -1); };
+            data->callback = [this](ring_data_t *data) { handle_event(data, -1, "read buffer area"); };
             io_uring_prep_readv(sqe, bs->dsk.journal_fd, &data->iov, 1, bs->dsk.journal_offset + md_offset);
             md_offset += data->iov.iov_len;
             submitted++;
@@ -186,7 +189,7 @@ resume_3:
     next_offset = md_offset;
     // Read the rest of the metadata
 resume_4:
-    if (next_offset < bs->dsk.meta_area_size && submitted == 0)
+    if (next_offset < bs->dsk.meta_area_size && submitted == 0 && (!zero_on_init || !bs->readonly))
     {
         // Submit one read
         for (int i = 0; i < 2; i++)
@@ -203,12 +206,15 @@ resume_4:
                 GET_SQE();
                 assert(bufs[i].size <= 0x7fffffff);
                 data->iov = { bufs[i].buf, (size_t)bufs[i].size };
-                data->callback = [this, i](ring_data_t *data) { handle_event(data, i); };
                 if (!zero_on_init)
+                {
+                    data->callback = [this, i](ring_data_t *data) { handle_event(data, i, "read metadata"); };
                     io_uring_prep_readv(sqe, bs->dsk.meta_fd, &data->iov, 1, bs->dsk.meta_offset + bufs[i].offset);
+                }
                 else
                 {
                     // Fill metadata with empty block pattern
+                    data->callback = [this, i](ring_data_t *data) { handle_event(data, i, "clear metadata"); };
                     memset(bufs[i].buf, 0, bufs[i].size);
                     for (uint64_t o = 0; o < bufs[i].size; o += bs->dsk.meta_block_size)
                         bs->heap->fill_block_empty_space(bufs[i].buf + o, 0);
@@ -224,11 +230,14 @@ resume_4:
         if (bufs[i].state == INIT_META_READ_DONE)
         {
             // Handle result
-            uint64_t loaded = 0;
-            int r = bs->heap->load_blocks(bufs[i].offset-bs->dsk.meta_block_size, bufs[i].size, bufs[i].buf, bs->skip_corrupted_meta_entries, loaded);
-            if (r != 0)
-                exit(1);
-            entries_loaded += loaded;
+            if (!zero_on_init)
+            {
+                uint64_t loaded = 0;
+                int r = bs->heap->load_blocks(bufs[i].offset-bs->dsk.meta_block_size, bufs[i].size, bufs[i].buf, bs->skip_corrupted_meta_entries, loaded);
+                if (r != 0)
+                    exit(1);
+                entries_loaded += loaded;
+            }
             bufs[i].state = 0;
             bs->ringloop->wakeup();
         }
@@ -238,51 +247,47 @@ resume_4:
         wait_state = 4;
         return 1;
     }
-    // metadata read finished
+    // metadata read/clear finished
     bs->heap->finish_load();
-    printf("Metadata entries loaded: %ju, used blocks: %ju / %ju\n", entries_loaded, bs->heap->get_data_used_space() / bs->dsk.data_block_size, bs->dsk.block_count);
-    if (zero_on_init && !bs->dsk.disable_meta_fsync)
-    {
-        GET_SQE();
-        io_uring_prep_fsync(sqe, bs->dsk.meta_fd, IORING_FSYNC_DATASYNC);
-        last_read_offset = 0;
-        data->iov = { 0 };
-        data->callback = [this](ring_data_t *data) { handle_event(data, -1); };
-        submitted++;
-        bs->ringloop->submit();
-    resume_5:
-        if (submitted > 0)
-        {
-            wait_state = 5;
-            return 1;
-        }
-    }
+    printf("Metadata entries loaded: %ju, rechecking unfinished writes and garbage entries\n", entries_loaded);
     // asynchronous recheck
 resume_6:
     wait_state = 6;
-    bs->heap->recheck_small_writes([this](bool is_data, uint64_t offset, uint64_t len, uint8_t *buf, std::function<void()> cb)
+    bs->heap->recheck_small_writes([this](bool is_data, uint64_t offset, uint64_t len, std::function<void(uint8_t*)> cb)
     {
-        if (!buf)
+        if (!len)
         {
             wait_state = 7;
             bs->ringloop->wakeup();
             return;
         }
-        GET_SQE();
-        data->iov = (iovec){ buf, len };
-        data->callback = [offset, cb](ring_data_t *data)
+        recheck_ios.push_back(new blockstore_recheck_io_t(is_data, offset, len, std::move(cb)));
+    }, bs->meta_write_recheck_parallelism);
+    while (recheck_ios.size())
+    {
+        blockstore_recheck_io_t* rc = recheck_ios.back();
+        sqe = bs->get_sqe();
+        if (!sqe)
+            break;
+        if (!rc->buf)
+            rc->buf = (uint8_t*)memalign_or_die(MEM_ALIGNMENT, rc->len);
+        data = ((ring_data_t*)sqe->user_data);
+        data->iov = (iovec){ rc->buf, rc->len };
+        data->callback = [this, rc](ring_data_t *data)
         {
             if (data->res < 0)
             {
-                fprintf(stderr, "Buffer area read failed at offset %ju: %d\n", offset, data->res);
+                fprintf(stderr, "Buffer area read failed at offset %ju: %d\n", rc->offset, data->res);
                 exit(1);
             }
-            cb();
+            rc->cb(rc->buf);
+            free(rc->buf);
+            delete rc;
         };
-        io_uring_prep_readv(sqe, (is_data ? bs->dsk.data_fd : bs->dsk.journal_fd), &data->iov, 1,
-            (is_data ? bs->dsk.data_offset : bs->dsk.journal_offset) + offset);
-        bs->ringloop->submit();
-    }, bs->meta_write_recheck_parallelism);
+        io_uring_prep_readv(sqe, (rc->is_data ? bs->dsk.data_fd : bs->dsk.journal_fd), &data->iov, 1,
+            (rc->is_data ? bs->dsk.data_offset : bs->dsk.journal_offset) + rc->offset);
+        recheck_ios.pop_back();
+    }
     return 1;
 resume_7:
     if (bs->heap->finish_recheck() != 0)
@@ -293,6 +298,11 @@ resume_7:
     if (bs->readonly)
     {
         recheck_mod.clear();
+        printf("Actual metadata entries: %ju\n", bs->heap->get_live_entries());
+    }
+    else
+    {
+        printf("Actual metadata entries: %ju, clearing garbage in %zu metadata blocks\n", bs->heap->get_live_entries(), recheck_mod.size());
     }
     for (i = 0; i < recheck_mod.size(); i++)
     {
@@ -306,7 +316,7 @@ resume_8:
         uint32_t block_num = recheck_mod[i];
         uint64_t block_offset = bs->dsk.meta_offset + (uint64_t)(block_num+1) * bs->dsk.meta_block_size;
         data = ((ring_data_t*)sqe->user_data);
-        uint8_t *buf = (uint8_t*)malloc_or_die(bs->dsk.meta_block_size);
+        uint8_t *buf = (uint8_t*)memalign_or_die(MEM_ALIGNMENT, bs->dsk.meta_block_size);
         bs->heap->get_meta_block(block_num, buf);
         data->iov = { buf, bs->dsk.meta_block_size };
         data->callback = [this, buf, block_offset](ring_data_t *data)
@@ -332,5 +342,47 @@ resume_9:
     }
     free(metadata_buffer);
     metadata_buffer = NULL;
+do_fsync:
+    if (!bs->dsk.disable_meta_fsync && !bs->readonly)
+    {
+        GET_SQE();
+        io_uring_prep_fsync(sqe, bs->dsk.meta_fd, IORING_FSYNC_DATASYNC);
+        last_read_offset = 0;
+        data->iov = { 0 };
+        data->callback = [this](ring_data_t *data) { handle_event(data, -1, "fsync metadata"); };
+        submitted++;
+        bs->ringloop->submit();
+    resume_5:
+        if (submitted > 0)
+        {
+            wait_state = 5;
+            return 1;
+        }
+    }
+    if (zero_on_init && !header_written && !bs->readonly)
+    {
+        GET_SQE();
+        header_written = true;
+        last_read_offset = 0;
+        data->iov = (struct iovec){ bs->meta_superblock, (size_t)bs->dsk.meta_block_size };
+        data->callback = [this](ring_data_t *data) { handle_event(data, -1, "write metadata header"); };
+        io_uring_prep_writev(sqe, bs->dsk.meta_fd, &data->iov, 1, bs->dsk.meta_offset);
+        bs->ringloop->submit();
+        submitted++;
+    resume_2:
+        if (submitted > 0)
+        {
+            wait_state = 2;
+            return 1;
+        }
+        if (!bs->dsk.disable_meta_fsync)
+        {
+            goto do_fsync;
+        }
+    }
+    printf("Loading finished. Data used: %ju / %ju bytes (%s / %s)\n",
+        bs->heap->get_data_used_space(), bs->dsk.block_count * bs->dsk.data_block_size,
+        format_size(bs->heap->get_data_used_space()).c_str(),
+        format_size(bs->dsk.block_count * bs->dsk.data_block_size).c_str());
     return 0;
 }