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block: get type of block allocation in commit_run

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bdrv_co_common_block_status_above not only returns whether the block is
allocated, but also if it contains zeroes.

Signed-off-by: Vincent Vanlaer <libvirt-e6954efa@volkihar.be>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
Message-Id: <20241026163010.2865002-2-libvirt-e6954efa@volkihar.be>
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
This commit is contained in:
Vincent Vanlaer 2024-10-26 18:30:05 +02:00 • committed by Vladimir Sementsov-Ogievskiy
parent 73d29ea241
commit 71365ee433
1 changed files with 9 additions and 3 deletions
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12
block/commit.c
View file

@ -15,6 +15,8 @@
#include "qemu/osdep.h"
#include "qemu/cutils.h"
#include "trace.h"
#include "block/block-common.h"
#include "block/coroutines.h"
#include "block/block_int.h"
#include "block/blockjob_int.h"
#include "qapi/error.h"
@ -167,9 +169,13 @@ static int coroutine_fn commit_run(Job *job, Error **errp)
break;
}
/* Copy if allocated above the base */
ret = blk_co_is_allocated_above(s->top, s->base_overlay, true,
offset, COMMIT_BUFFER_SIZE, &n);
copy = (ret > 0);
WITH_GRAPH_RDLOCK_GUARD() {
ret = bdrv_co_common_block_status_above(blk_bs(s->top),
s->base_overlay, true, true, offset, COMMIT_BUFFER_SIZE,
&n, NULL, NULL, NULL);
}
copy = (ret >= 0 && ret & BDRV_BLOCK_ALLOCATED);
trace_commit_one_iteration(s, offset, n, ret);
if (copy) {
assert(n < SIZE_MAX);