From: Andrey Shinkevich <andrey.shinkevich@virtuozzo.com>
To: qemu-block@nongnu.org
Cc: kwolf@redhat.com, vsementsov@virtuozzo.com, armbru@redhat.com,
qemu-devel@nongnu.org, andrey.shinkevich@virtuozzo.com,
den@openvz.org, mreitz@redhat.com
Subject: [PATCH v2 0/2] Dump QCOW2 metadata
Date: Mon, 13 Jan 2020 18:55:31 +0300 [thread overview]
Message-ID: <1578930933-69721-1-git-send-email-andrey.shinkevich@virtuozzo.com> (raw)
The information about QCOW2 metadata allocations in an image ELF-file is
helpful for finding issues with the image data integrity.
v2: Descriptions of the new key option were added and the names of identifiers
were amended (suggested by Eric). Discussed in the email thread with ID
<1577447039-400109-1-git-send-email-andrey.shinkevich@virtuozzo.com>
Snapshots dump example:
$ sudo ./qemu-img check /.../.../harddisk.hdd -M --output=json
{
"image-end-offset": 24820842496,
"total-clusters": 153600,
"check-errors": 0,
"viscera": {
"refcount-table": {
"location": {
"offset": 3845128192,
"size": 1048576
}
},
"active-l1": {
"name": "L1 active table",
"location": {
"offset": 4194304,
"size": 16
},
"l2-list": [
{
"offset": 619708416,
"size": 1048576
},
{
"offset": 1156579328,
"size": 1048576
}
]
},
"qcow2-header": {
"location": {
"offset": 0,
"size": 1048576
},
"version": 3
},
"snapshot-table": {
"location": {
"offset": 648019968,
"size": 191
},
"l1-list": [
{
"name": "{3036f6c5-3a1f-44cb-af1f-653cc87fba04}",
"location": {
"offset": 14680064,
"size": 16
},
"l2-list": [
{
"offset": 3957325824,
"size": 1048576
},
{
"offset": 7025459200,
"size": 1048576
}
]
},
{
"name": "{0aa1a7d6-16ee-4b44-a515-b5ecc571c959}",
"location": {
"offset": 638582784,
"size": 16
},
"l2-list": [
{
"offset": 3957325824,
"size": 1048576
},
{
"offset": 7025459200,
"size": 1048576
}
]
}
]
}
},
"allocated-clusters": 22485,
"filename": "/.../.../harddisk.hdd",
"format": "qcow2",
"fragmented-clusters": 3549
}
Bitmaps dump example:
$ ./qemu-img check /home/disk -M --output=json
{
"image-end-offset": 1441792,
"total-clusters": 16,
"check-errors": 0,
"viscera": {
"refcount-table": {
"location": {
"offset": 65536,
"size": 65536
}
},
"active-l1": {
"name": "L1 active table",
"location": {
"offset": 196608,
"size": 8
},
"l2-list": [
{
"offset": 262144,
"size": 65536
}
]
},
"bitmaps": {
"bitmap-dir": {
"location": {
"offset": 1048576,
"size": 64
},
"dir-entries": [
{
"bitmap-table": {
"location": {
"offset": 589824,
"size": 8
},
"table-entries": [
{
"type": "all-zeros"
}
]
},
"bitmap-name": "bitmap-1"
},
{
"bitmap-table": {
"location": {
"offset": 983040,
"size": 8
},
"table-entries": [
{
"cluster": {
"offset": 655360,
"size": 65536
},
"type": "serialized"
}
]
},
"bitmap-name": "bitmap-2"
}
]
},
"nb-bitmaps": 2
},
"qcow2-header": {
"location": {
"offset": 0,
"size": 65536
},
"version": 3
}
},
"allocated-clusters": 12,
"filename": "/home/disk",
"format": "qcow2",
"fragmented-clusters": 2
}
Andrey Shinkevich (2):
qcow2: introduce Qcow2Metadata structure
qcow2: dump QCOW2 metadata
block/qcow2-bitmap.c | 54 ++++++++++++-
block/qcow2-refcount.c | 84 ++++++++++++++++----
block/qcow2.c | 30 +++++++
block/qcow2.h | 6 +-
include/block/block.h | 3 +-
qapi/block-core.json | 209 ++++++++++++++++++++++++++++++++++++++++++++++++-
qemu-img.c | 30 ++++++-
qemu-img.texi | 6 +-
8 files changed, 397 insertions(+), 25 deletions(-)
--
1.8.3.1
next reply other threads:[~2020-01-13 15:58 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-13 15:55 Andrey Shinkevich [this message]
2020-01-13 15:55 ` [PATCH v2 1/2] qcow2: introduce Qcow2Metadata structure Andrey Shinkevich
2020-01-13 15:55 ` [PATCH v2 2/2] qcow2: dump QCOW2 metadata Andrey Shinkevich
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