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authorXiao Ni <xni@redhat.com>2020-08-25 08:42:59 +0300
committerSong Liu <songliubraving@fb.com>2020-09-25 02:44:45 +0300
commit2628089b74d5a64bd0bcb5d247a18f78d7b6f4d0 (patch)
tree47ba9f41e75f0dfaa6fda2a52e37d491b54b00a8 /drivers/md/md.c
parente287308b8388590ad70e8e88d1cc70a4643bacd7 (diff)
downloadlinux-2628089b74d5a64bd0bcb5d247a18f78d7b6f4d0.tar.xz
md: add md_submit_discard_bio() for submitting discard bio
Move these logic from raid0.c to md.c, so that we can also use it in raid10.c. Reviewed-by: Coly Li <colyli@suse.de> Reviewed-by: Guoqing Jiang <guoqing.jiang@cloud.ionos.com> Signed-off-by: Xiao Ni <xni@redhat.com> Signed-off-by: Song Liu <songliubraving@fb.com>
Diffstat (limited to 'drivers/md/md.c')
-rw-r--r--drivers/md/md.c20
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 64bc22d2b606..dfff4bb2bb20 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -8583,6 +8583,26 @@ void md_write_end(struct mddev *mddev)
EXPORT_SYMBOL(md_write_end);
+/* This is used by raid0 and raid10 */
+void md_submit_discard_bio(struct mddev *mddev, struct md_rdev *rdev,
+ struct bio *bio, sector_t start, sector_t size)
+{
+ struct bio *discard_bio = NULL;
+
+ if (__blkdev_issue_discard(rdev->bdev, start, size,
+ GFP_NOIO, 0, &discard_bio) || !discard_bio)
+ return;
+
+ bio_chain(discard_bio, bio);
+ bio_clone_blkg_association(discard_bio, bio);
+ if (mddev->gendisk)
+ trace_block_bio_remap(bdev_get_queue(rdev->bdev),
+ discard_bio, disk_devt(mddev->gendisk),
+ bio->bi_iter.bi_sector);
+ submit_bio_noacct(discard_bio);
+}
+EXPORT_SYMBOL(md_submit_discard_bio);
+
/* md_allow_write(mddev)
* Calling this ensures that the array is marked 'active' so that writes
* may proceed without blocking. It is important to call this before