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/blklogwrites.c b/block/blklogwrites.c
index efa2c7a..ff98cd5 100644
--- a/block/blklogwrites.c
+++ b/block/blklogwrites.c
@@ -486,7 +486,7 @@
static int coroutine_fn
blk_log_writes_co_do_file_pdiscard(BlkLogWritesFileReq *fr)
{
- return bdrv_co_pdiscard(fr->bs->file->bs, fr->offset, fr->bytes);
+ return bdrv_co_pdiscard(fr->bs->file, fr->offset, fr->bytes);
}
static int coroutine_fn
