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block: Add PreallocMode to blk_truncate()

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blk_truncate() itself will pass that value to bdrv_truncate(), and all
callers of blk_truncate() just set the parameter to PREALLOC_MODE_OFF
for now.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: 20170613202107.10125-4-mreitz@redhat.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
This commit is contained in:
Max Reitz 2017-06-13 22:20:54 +02:00
parent 7ea37c3066
commit 3a691c50f1
15 changed files with 27 additions and 21 deletions
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4
block/commit.c
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@ -163,7 +163,7 @@ static void coroutine_fn commit_run(void *opaque)
}
if (base_len < s->common.len) {
ret = blk_truncate(s->base, s->common.len, NULL);
ret = blk_truncate(s->base, s->common.len, PREALLOC_MODE_OFF, NULL);
if (ret) {
goto out;
}
@ -521,7 +521,7 @@ int bdrv_commit(BlockDriverState *bs)
* grow the backing file image if possible. If not possible,
* we must return an error */
if (length > backing_length) {
ret = blk_truncate(backing, length, &local_err);
ret = blk_truncate(backing, length, PREALLOC_MODE_OFF, &local_err);
if (ret < 0) {
error_report_err(local_err);
goto ro_cleanup;