md/raid0: attach correct cgroup info in bio

shligit · shligit · commit 8a8e6f84ad10 · 2017-08-25T10:21:48.000-07:00
The discard bio doesn't attach the original bio cgroup info. Normal bio
is cloned, so is fine.

Signed-off-by: Shaohua Li &lt;shli@fb.com&gt;
diff --git a/block/bio.c b/block/bio.c
@@ -2085,7 +2085,7 @@ void bio_clone_blkcg_association(struct bio *dst, struct bio *src)
 	if (src->bi_css)
 		WARN_ON(bio_associate_blkcg(dst, src->bi_css));
 }
-
+EXPORT_SYMBOL_GPL(bio_clone_blkcg_association);
 #endif /* CONFIG_BLK_CGROUP */
 
 static void __init biovec_init_slabs(void)
diff --git a/drivers/md/raid0.c b/drivers/md/raid0.c
@@ -539,6 +539,7 @@ static void raid0_handle_discard(struct mddev *mddev, struct bio *bio)
 		    !discard_bio)
 			continue;
 		bio_chain(discard_bio, bio);
+		bio_clone_blkcg_association(discard_bio, bio);
 		if (mddev->gendisk)
 			trace_block_bio_remap(bdev_get_queue(rdev->bdev),
 				discard_bio, disk_devt(mddev->gendisk),

Original file line number	Diff line number	Diff line change
`@@ -2085,7 +2085,7 @@ void bio_clone_blkcg_association(struct bio dst, struct bio src)`
`2085`	`2085`	`if (src->bi_css)`
`2086`	`2086`	`WARN_ON(bio_associate_blkcg(dst, src->bi_css));`
`2087`	`2087`	`}`
`2088`		`-`
	`2088`	`+EXPORT_SYMBOL_GPL(bio_clone_blkcg_association);`
`2089`	`2089`	`#endif /* CONFIG_BLK_CGROUP */`
`2090`	`2090`
`2091`	`2091`	`static void __init biovec_init_slabs(void)`