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commit: Implement .bdrv_refresh_filename 

We want query-block to return the right filename, even if a commit job
put a bdrv_commit_top on top of the actual image format driver. Let
bdrv_commit_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 fd4a6493bb
commit dcbf37ce41
1 changed files with 8 additions and 0 deletions
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8
block/commit.c
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@ -13,6 +13,7 @@
*/ */
#include "qemu/osdep.h" #include "qemu/osdep.h"
#include "qemu/cutils.h"
#include "trace.h" #include "trace.h"
#include "block/block_int.h" #include "block/block_int.h"
#include "block/blockjob_int.h" #include "block/blockjob_int.h"
@ -242,6 +243,12 @@ static int64_t coroutine_fn bdrv_commit_top_get_block_status(
(sector_num << BDRV_SECTOR_BITS); (sector_num << BDRV_SECTOR_BITS);
} }
static void bdrv_commit_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_commit_top_close(BlockDriverState *bs) static void bdrv_commit_top_close(BlockDriverState *bs)
{ {
@ -262,6 +269,7 @@ static BlockDriver bdrv_commit_top = {
.format_name = "commit_top", .format_name = "commit_top",
.bdrv_co_preadv = bdrv_commit_top_preadv, .bdrv_co_preadv = bdrv_commit_top_preadv,
.bdrv_co_get_block_status = bdrv_commit_top_get_block_status, .bdrv_co_get_block_status = bdrv_commit_top_get_block_status,
.bdrv_refresh_filename = bdrv_commit_top_refresh_filename,
.bdrv_close = bdrv_commit_top_close, .bdrv_close = bdrv_commit_top_close,
.bdrv_child_perm = bdrv_commit_top_child_perm, .bdrv_child_perm = bdrv_commit_top_child_perm,
}; };