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block: Add bdrv_change_backing_file

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Introduce the functions needed to change the backing file of an image. The
function is implemented for qcow2.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Kevin Wolf 2010-01-12 12:55:17 +01:00 • committed by Anthony Liguori
parent b783e409bf
commit 756e6736a1
4 changed files with 126 additions and 0 deletions
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3
block_int.h
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@ -98,6 +98,9 @@ struct BlockDriver {
int (*bdrv_load_vmstate)(BlockDriverState *bs, uint8_t *buf,
int64_t pos, int size);
int (*bdrv_change_backing_file)(BlockDriverState *bs,
const char *backing_file, const char *backing_fmt);
/* removable device specific */
int (*bdrv_is_inserted)(BlockDriverState *bs);
int (*bdrv_media_changed)(BlockDriverState *bs);