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[RFC,2/6] block: Error an attempt to split an atomic write in bio_split()

Message ID 20240919092302.3094725-3-john.g.garry@oracle.com (mailing list archive)
State New, archived
Headers show
Series bio_split() error handling rework | expand

Commit Message

John Garry Sept. 19, 2024, 9:22 a.m. UTC 
This is disallowed.

Signed-off-by: John Garry <john.g.garry@oracle.com>
---
 block/bio.c | 4 ++++
 1 file changed, 4 insertions(+)
diff mbox series

Patch

diff --git a/block/bio.c b/block/bio.c
index 784ad8d35bd0..08caee855ca4 100644
--- a/block/bio.c
+++ b/block/bio.c
@@ -1737,6 +1737,10 @@  struct bio *bio_split(struct bio *bio, int sectors,
 	if (WARN_ON_ONCE(bio_op(bio) == REQ_OP_ZONE_APPEND))
 		return ERR_PTR(-EINVAL);
 
+	/* atomic writes cannot be split */
+	if (bio->bi_opf & REQ_ATOMIC)
+		return ERR_PTR(-EINVAL);
+
 	split = bio_alloc_clone(bio->bi_bdev, bio, gfp, bs);
 	if (!split)
 		return ERR_PTR(-ENOMEM);