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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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5
block/block-backend.c
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@ -1773,14 +1773,15 @@ int blk_pwrite_compressed(BlockBackend *blk, int64_t offset, const void *buf,
BDRV_REQ_WRITE_COMPRESSED);
}
int blk_truncate(BlockBackend *blk, int64_t offset, Error **errp)
int blk_truncate(BlockBackend *blk, int64_t offset, PreallocMode prealloc,
Error **errp)
{
if (!blk_is_available(blk)) {
error_setg(errp, "No medium inserted");
return -ENOMEDIUM;
}
return bdrv_truncate(blk->root, offset, PREALLOC_MODE_OFF, errp);
return bdrv_truncate(blk->root, offset, prealloc, errp);
}
static void blk_pdiscard_entry(void *opaque)