block: Use BdrvChild to discard
Other I/O functions are already using a BdrvChild pointer in the API, so
make discard do the same. It makes it possible to initiate the same
permission checks before doing I/O, and much easier to share the
helper functions for this, which will be added and used by write,
truncate and copy range paths.
Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
diff --git a/block/blkdebug.c b/block/blkdebug.c
index 526af2a..0457bf5 100644
--- a/block/blkdebug.c
+++ b/block/blkdebug.c
@@ -625,7 +625,7 @@
return err;
}
- return bdrv_co_pdiscard(bs->file->bs, offset, bytes);
+ return bdrv_co_pdiscard(bs->file, offset, bytes);
}
static int coroutine_fn blkdebug_co_block_status(BlockDriverState *bs,
