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Fix -snapshot deleting images on disk change 

Block device change command did not copy BDRV_O_SNAPSHOT flag. Thus
the new image did not have this flag and the file got deleted during
opening.

Fix by copying BDRV_O_SNAPSHOT flag.

Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Blue Swirl 2010-07-25 20:49:34 +00:00 committed by Kevin Wolf
parent c98ac35d87
commit 199630b62e
3 changed files with 7 additions and 0 deletions
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5
block.c
View File

@ -1811,6 +1811,11 @@ int bdrv_can_snapshot(BlockDriverState *bs)
return 1;
}
int bdrv_is_snapshot(BlockDriverState *bs)
{
return !!(bs->open_flags & BDRV_O_SNAPSHOT);
}
BlockDriverState *bdrv_snapshots(void)
{
BlockDriverState *bs;

1
block.h
View File

@ -202,6 +202,7 @@ const char *bdrv_get_encrypted_filename(BlockDriverState *bs);
void bdrv_get_backing_filename(BlockDriverState *bs,
char *filename, int filename_size);
int bdrv_can_snapshot(BlockDriverState *bs);
int bdrv_is_snapshot(BlockDriverState *bs);
BlockDriverState *bdrv_snapshots(void);
int bdrv_snapshot_create(BlockDriverState *bs,
QEMUSnapshotInfo *sn_info);

1
blockdev.c
View File

@ -590,6 +590,7 @@ int do_change_block(Monitor *mon, const char *device,
return -1;
}
bdrv_flags = bdrv_is_read_only(bs) ? 0 : BDRV_O_RDWR;
bdrv_flags |= bdrv_is_snapshot(bs) ? BDRV_O_SNAPSHOT : 0;
if (bdrv_open(bs, filename, bdrv_flags, drv) < 0) {
qerror_report(QERR_OPEN_FILE_FAILED, filename);
return -1;