[PATCH V2 1/5] md: add md_submit_discard_bio() for submitting discard bio
From: Xiao Ni <hidden>
Date: 2021-02-04 07:52:29
Subsystem:
software raid (multiple disks) support, the rest · Maintainers:
Song Liu, Yu Kuai, Linus Torvalds
Move these logic from raid0.c to md.c, so that we can also use it in raid10.c. Reviewed-by: Coly Li <redacted> Reviewed-by: Guoqing Jiang <redacted> Signed-off-by: Xiao Ni <redacted> --- drivers/md/md.c | 20 ++++++++++++++++++++ drivers/md/md.h | 2 ++ drivers/md/raid0.c | 14 ++------------ 3 files changed, 24 insertions(+), 12 deletions(-)
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 7d1bb24..f18cd0d 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c@@ -8590,6 +8590,26 @@ 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(discard_bio, + disk_devt(mddev->gendisk), + bio->bi_iter.bi_sector); + submit_bio_noacct(discard_bio); +} +EXPORT_SYMBOL_GPL(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
diff --git a/drivers/md/md.h b/drivers/md/md.h
index f13290c..501fdcc57 100644
--- a/drivers/md/md.h
+++ b/drivers/md/md.h@@ -713,6 +713,8 @@ extern void md_write_end(struct mddev *mddev); extern void md_done_sync(struct mddev *mddev, int blocks, int ok); extern void md_error(struct mddev *mddev, struct md_rdev *rdev); extern void md_finish_reshape(struct mddev *mddev); +void md_submit_discard_bio(struct mddev *mddev, struct md_rdev *rdev, + struct bio *bio, sector_t start, sector_t size); extern bool __must_check md_flush_request(struct mddev *mddev, struct bio *bio); extern void md_super_write(struct mddev *mddev, struct md_rdev *rdev,
diff --git a/drivers/md/raid0.c b/drivers/md/raid0.c
index 67f157f..e5d7411 100644
--- a/drivers/md/raid0.c
+++ b/drivers/md/raid0.c@@ -477,7 +477,6 @@ static void raid0_handle_discard(struct mddev *mddev, struct bio *bio) for (disk = 0; disk < zone->nb_dev; disk++) { sector_t dev_start, dev_end; - struct bio *discard_bio = NULL; struct md_rdev *rdev; if (disk < start_disk_index)
@@ -500,18 +499,9 @@ static void raid0_handle_discard(struct mddev *mddev, struct bio *bio) rdev = conf->devlist[(zone - conf->strip_zone) * conf->strip_zone[0].nb_dev + disk]; - if (__blkdev_issue_discard(rdev->bdev, + md_submit_discard_bio(mddev, rdev, bio, dev_start + zone->dev_start + rdev->data_offset, - dev_end - dev_start, GFP_NOIO, 0, &discard_bio) || - !discard_bio) - continue; - bio_chain(discard_bio, bio); - bio_clone_blkg_association(discard_bio, bio); - if (mddev->gendisk) - trace_block_bio_remap(discard_bio, - disk_devt(mddev->gendisk), - bio->bi_iter.bi_sector); - submit_bio_noacct(discard_bio); + dev_end - dev_start); } bio_endio(bio); }
--
2.7.5