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mirror: Implement .bdrv_refresh_filename

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We want query-block to return the right filename, even if a mirror job
put a bdrv_mirror_top on top of the actual image format driver. Let
bdrv_mirror_top.bdrv_refresh_filename get the filename from its backing
file.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
This commit is contained in:
Kevin Wolf 2017-03-09 11:49:16 +01:00
parent 9e7e940c3d
commit fd4a6493bb
1 changed files with 9 additions and 0 deletions
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9
block/mirror.c
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@ -12,6 +12,7 @@
*/
#include "qemu/osdep.h"
#include "qemu/cutils.h"
#include "trace.h"
#include "block/blockjob_int.h"
#include "block/block_int.h"
@ -1060,6 +1061,13 @@ static int coroutine_fn bdrv_mirror_top_pdiscard(BlockDriverState *bs,
return bdrv_co_pdiscard(bs->backing->bs, offset, count);
}
static void bdrv_mirror_top_refresh_filename(BlockDriverState *bs, QDict *opts)
{
bdrv_refresh_filename(bs->backing->bs);
pstrcpy(bs->exact_filename, sizeof(bs->exact_filename),
bs->backing->bs->filename);
}
static void bdrv_mirror_top_close(BlockDriverState *bs)
{
}
@ -1088,6 +1096,7 @@ static BlockDriver bdrv_mirror_top = {
.bdrv_co_pdiscard = bdrv_mirror_top_pdiscard,
.bdrv_co_flush = bdrv_mirror_top_flush,
.bdrv_co_get_block_status = bdrv_mirror_top_get_block_status,
.bdrv_refresh_filename = bdrv_mirror_top_refresh_filename,
.bdrv_close = bdrv_mirror_top_close,
.bdrv_child_perm = bdrv_mirror_top_child_perm,
};