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block/dirty-bitmap: add inconsistent status 

Even though the status field is deprecated, we still have to support
it for a few more releases. Since this is a very new kind of bitmap
state, it makes sense for it to have its own status field.

Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-id: 20190301191545.8728-3-jsnow@redhat.com
Signed-off-by: John Snow <jsnow@redhat.com>
This commit is contained in:
John Snow 2019-03-12 12:05:49 -04:00
parent b0f455599d
commit 0064cfefa4
2 changed files with 12 additions and 2 deletions
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7
block/dirty-bitmap.c
View File

@ -210,10 +210,15 @@ bool bdrv_dirty_bitmap_enabled(BdrvDirtyBitmap *bitmap)
* or it can be Disabled and not recording writes.
* (4) Locked: Whether Active or Disabled, the user cannot modify this bitmap
* in any way from the monitor.
* (5) Inconsistent: This is a persistent bitmap whose "in use" bit is set, and
* is unusable by QEMU. It can be deleted to remove it from
* the qcow2.
*/
DirtyBitmapStatus bdrv_dirty_bitmap_status(BdrvDirtyBitmap *bitmap)
{
if (bdrv_dirty_bitmap_has_successor(bitmap)) {
if (bdrv_dirty_bitmap_inconsistent(bitmap)) {
return DIRTY_BITMAP_STATUS_INCONSISTENT;
} else if (bdrv_dirty_bitmap_has_successor(bitmap)) {
return DIRTY_BITMAP_STATUS_FROZEN;
} else if (bdrv_dirty_bitmap_busy(bitmap)) {
return DIRTY_BITMAP_STATUS_LOCKED;

7
qapi/block-core.json
View File

@ -451,10 +451,15 @@
# recording new writes. If the bitmap was @disabled, it is not
# recording new writes. (Since 2.12)
#
# @inconsistent: This is a persistent dirty bitmap that was marked in-use on
# disk, and is unusable by QEMU. It can only be deleted.
# Please rely on the inconsistent field in @BlockDirtyInfo
# instead, as the status field is deprecated. (Since 4.0)
#
# Since: 2.4
##
{ 'enum': 'DirtyBitmapStatus',
'data': ['active', 'disabled', 'frozen', 'locked'] }
'data': ['active', 'disabled', 'frozen', 'locked', 'inconsistent'] }
##
# @BlockDirtyInfo: