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|
performance: 0.923
user-level: 0.923
register: 0.921
debug: 0.920
permissions: 0.915
graphic: 0.904
architecture: 0.903
device: 0.890
assembly: 0.881
arm: 0.870
virtual: 0.870
PID: 0.858
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VMM: 0.620
i386: 0.550
blockdev-del doesn't work after blockdev-backup with incremental, which using dirty-bitmap
Description of problem:
After incremental backup with bitmap, blockdev-del doesn't work at target node.
Because of this, incremental backup cannot rebase to base node.
I refered this. https://qemu-project.gitlab.io/qemu/interop/bitmaps.html#example-incremental-push-backups-without-backing-files
Steps to reproduce:
1. `blockdev-add` incremental backup node
```
echo '{"execute":"qmp_capabilities"}{"execute":"blockdev-add","arguments":{"driver":"qcow2","node-name":"incre0","file":{"driver":"file","filename":"/mnt/7b12fe9c-fa0f-4f2a-82b1-3a6cd4e15ae8/temp/incre0.qcow2"}}}' | nc -U /mnt/7b12fe9c-fa0f-4f2a-82b1-3a6cd4e15ae8/temp/qmp.sock -N
{
"return": {
}
}
```
2. `blockdev-backup` with `vda` to target `incre0` node
```
echo '{"execute":"qmp_capabilities"}{"execute":"blockdev-backup", "arguments": {"device": "vda", "bitmap":"bitmap0", "target": "incre0", "sync": "incremental", "job-id": "incre0-job", "speed": 536870912}}' | nc -U /mnt/7b12fe9c-fa0f-4f2a-82b1-3a6cd4e15ae8/temp/qmp.sock -N
{
"timestamp": {
"seconds": 1651050066,
"microseconds": 848370
},
"event": "JOB_STATUS_CHANGE",
"data": {
"status": "created",
"id": "incre0-job"
}
}
{
"timestamp": {
"seconds": 1651050066,
"microseconds": 848431
},
"event": "JOB_STATUS_CHANGE",
"data": {
"status": "running",
"id": "incre0-job"
}
}
{
"timestamp": {
"seconds": 1651050066,
"microseconds": 848464
},
"event": "JOB_STATUS_CHANGE",
"data": {
"status": "paused",
"id": "incre0-job"
}
}
{
"timestamp": {
"seconds": 1651050066,
"microseconds": 848485
},
"event": "JOB_STATUS_CHANGE",
"data": {
"status": "running",
"id": "incre0-job"
}
}
{
"return": {
}
}
```
3. `query-block-jobs` check `incre0-job` is done
```
echo '{"execute":"qmp_capabilities"}{"execute":"query-block-jobs"}' | nc -U /mnt/7b12fe9c-fa0f-4f2a-82b1-3a6cd4e15ae8/temp/qmp.sock -N
{
"return": {
}
}
{
"return": [
]
}
```
4. To release write lock (need to rebase in incre0.qcow2), `blockdev-del`
```
echo '{"execute":"qmp_capabilities"}{"execute":"blockdev-del","arguments":{"node-name":"incre0"}' | nc -U /mnt/7b12fe9c-fa0f-4f2a-82b1-3a6cd4e15ae8/temp/qmp.sock -N
{
"return": {
}
}
```
5. `qemu-img rebase`
```
qemu-img rebase -b base.qcow2 -u incre0.qcow2
qemu-img: Could not open 'incre0.qcow2': Failed to get "write" lock
Is another process using the image [incre0.qcow2]?
```
6. check `query-named-block-nodes` after `blockdev-del`
```
{
"return": [
{
"iops_rd": 0,
"detect_zeroes": "off",
"image": {
"virtual-size": 53687091200,
"filename": "/mnt/7b12fe9c-fa0f-4f2a-82b1-3a6cd4e15ae8/temp/incre0.qcow2",
"cluster-size": 65536,
"format": "qcow2",
"actual-size": 241340416,
"format-specific": {
"type": "qcow2",
"data": {
"compat": "1.1",
"compression-type": "zlib",
"lazy-refcounts": false,
"refcount-bits": 16,
"corrupt": false,
"extended-l2": false
}
},
"dirty-flag": false
},
"iops_wr": 0,
"ro": false,
"node-name": "incre0",
"backing_file_depth": 0,
"drv": "qcow2",
"iops": 0,
"bps_wr": 0,
"write_threshold": 0,
"encrypted": false,
"bps": 0,
"bps_rd": 0,
"cache": {
"no-flush": false,
"direct": false,
"writeback": true
},
"file": "/mnt/7b12fe9c-fa0f-4f2a-82b1-3a6cd4e15ae8/temp/incre0.qcow2"
},
{
"iops_rd": 0,
"detect_zeroes": "off",
"image": {
"virtual-size": 240451584,
"filename": "/mnt/7b12fe9c-fa0f-4f2a-82b1-3a6cd4e15ae8/temp/incre0.qcow2",
"format": "file",
"actual-size": 241340416,
"dirty-flag": false
},
"iops_wr": 0,
"ro": false,
"node-name": "#block412",
"backing_file_depth": 0,
"drv": "file",
"iops": 0,
"bps_wr": 0,
"write_threshold": 0,
"encrypted": false,
"bps": 0,
"bps_rd": 0,
"cache": {
"no-flush": false,
"direct": false,
"writeback": true
},
"file": "/mnt/7b12fe9c-fa0f-4f2a-82b1-3a6cd4e15ae8/temp/incre0.qcow2"
},
......
]
}
```
Additional information:
|
