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block: Add PreallocMode to bdrv_truncate()

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For block drivers that just pass a truncate request to the underlying
protocol, we can now pass the preallocation mode instead of aborting if
it is not PREALLOC_MODE_OFF.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: 20170613202107.10125-3-mreitz@redhat.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
This commit is contained in:
Max Reitz 2017-06-13 22:20:53 +02:00
parent 8243ccb743
commit 7ea37c3066
12 changed files with 26 additions and 36 deletions
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2
block/qcow2-refcount.c
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@ -1732,7 +1732,7 @@ static int check_refblocks(BlockDriverState *bs, BdrvCheckResult *res,
}
ret = bdrv_truncate(bs->file, offset + s->cluster_size,
&local_err);
PREALLOC_MODE_OFF, &local_err);
if (ret < 0) {
error_report_err(local_err);
goto resize_fail;