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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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8
block/blkdebug.c
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@ -824,13 +824,7 @@ static int64_t blkdebug_getlength(BlockDriverState *bs)
static int blkdebug_truncate(BlockDriverState *bs, int64_t offset,
PreallocMode prealloc, Error **errp)
{
if (prealloc != PREALLOC_MODE_OFF) {
error_setg(errp, "Unsupported preallocation mode '%s'",
PreallocMode_lookup[prealloc]);
return -ENOTSUP;
}
return bdrv_truncate(bs->file, offset, errp);
return bdrv_truncate(bs->file, offset, prealloc, errp);
}
static void blkdebug_refresh_filename(BlockDriverState *bs, QDict *options)