qcow2: Add list of bitmaps to ImageInfoSpecificQCow2

In the 'Format specific information' section of the 'qemu-img info'
command output, the supplemental information about existing QCOW2
bitmaps will be shown, such as a bitmap name, flags and granularity:

image: /vz/vmprivate/VM1/harddisk.hdd
file format: qcow2
virtual size: 64G (68719476736 bytes)
disk size: 3.0M
cluster_size: 1048576
Format specific information:
    compat: 1.1
    lazy refcounts: true
    bitmaps:
        [0]:
            flags:
                [0]: in-use
                [1]: auto
            name: back-up1
            granularity: 65536
        [1]:
            flags:
                [0]: in-use
                [1]: auto
            name: back-up2
            granularity: 65536
    refcount bits: 16
    corrupt: false

Signed-off-by: Andrey Shinkevich <andrey.shinkevich@virtuozzo.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-Id: <1549638368-530182-3-git-send-email-andrey.shinkevich@virtuozzo.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
This commit is contained in:
Andrey Shinkevich 2019-02-08 18:06:07 +03:00 committed by Eric Blake
parent 1bf6e9ca92
commit b8968c875f
4 changed files with 128 additions and 2 deletions

View file

@ -69,6 +69,8 @@
# @encrypt: details about encryption parameters; only set if image
# is encrypted (since 2.10)
#
# @bitmaps: A list of qcow2 bitmap details (since 4.0)
#
# Since: 1.7
##
{ 'struct': 'ImageInfoSpecificQCow2',
@ -77,7 +79,8 @@
'*lazy-refcounts': 'bool',
'*corrupt': 'bool',
'refcount-bits': 'int',
'*encrypt': 'ImageInfoSpecificQCow2Encryption'
'*encrypt': 'ImageInfoSpecificQCow2Encryption',
'*bitmaps': ['Qcow2BitmapInfo']
} }
##
@ -453,6 +456,42 @@
'data': {'*name': 'str', 'count': 'int', 'granularity': 'uint32',
'status': 'DirtyBitmapStatus'} }
##
# @Qcow2BitmapInfoFlags:
#
# An enumeration of flags that a bitmap can report to the user.
#
# @in-use: This flag is set by any process actively modifying the qcow2 file,
# and cleared when the updated bitmap is flushed to the qcow2 image.
# The presence of this flag in an offline image means that the bitmap
# was not saved correctly after its last usage, and may contain
# inconsistent data.
#
# @auto: The bitmap must reflect all changes of the virtual disk by any
# application that would write to this qcow2 file.
#
# Since: 4.0
##
{ 'enum': 'Qcow2BitmapInfoFlags',
'data': ['in-use', 'auto'] }
##
# @Qcow2BitmapInfo:
#
# Qcow2 bitmap information.
#
# @name: the name of the bitmap
#
# @granularity: granularity of the bitmap in bytes
#
# @flags: flags of the bitmap
#
# Since: 4.0
##
{ 'struct': 'Qcow2BitmapInfo',
'data': {'name': 'str', 'granularity': 'uint32',
'flags': ['Qcow2BitmapInfoFlags'] } }
##
# @BlockLatencyHistogramInfo:
#