linux-kernel - [PATCH -next v3 3/7] md/raid1-10: factor out a helper to submit normal write

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Date:   Mon, 29 May 2023 21:11:02 +0800
From:   Yu Kuai <yukuai1@...weicloud.com>
To:     song@...nel.org, neilb@...e.de, akpm@...l.org
Cc:     xni@...hat.com, linux-raid@...r.kernel.org,
        linux-kernel@...r.kernel.org, yukuai3@...wei.com,
        yukuai1@...weicloud.com, yi.zhang@...wei.com, yangerkun@...wei.com
Subject: [PATCH -next v3 3/7] md/raid1-10: factor out a helper to submit normal write

From: Yu Kuai <yukuai3@...wei.com>

There are multiple places to do the same thing, factor out a helper to
prevent redundant code, and the helper will be used in following patch
as well.

Signed-off-by: Yu Kuai <yukuai3@...wei.com>
---
 drivers/md/raid1-10.c | 17 +++++++++++++++++
 drivers/md/raid1.c    | 13 ++-----------
 drivers/md/raid10.c   | 26 ++++----------------------
 3 files changed, 23 insertions(+), 33 deletions(-)

diff --git a/drivers/md/raid1-10.c b/drivers/md/raid1-10.c
index 9bf19a3409ce..506299bd55cb 100644
--- a/drivers/md/raid1-10.c
+++ b/drivers/md/raid1-10.c
@@ -110,6 +110,23 @@ static void md_bio_reset_resync_pages(struct bio *bio, struct resync_pages *rp,
 	} while (idx++ < RESYNC_PAGES && size > 0);
 }
 
+
+static inline void raid1_submit_write(struct bio *bio)
+{
+	struct md_rdev *rdev = (struct md_rdev *)bio->bi_bdev;
+
+	bio->bi_next = NULL;
+	bio_set_dev(bio, rdev->bdev);
+	if (test_bit(Faulty, &rdev->flags))
+		bio_io_error(bio);
+	else if (unlikely(bio_op(bio) ==  REQ_OP_DISCARD &&
+			  !bdev_max_discard_sectors(bio->bi_bdev)))
+		/* Just ignore it */
+		bio_endio(bio);
+	else
+		submit_bio_noacct(bio);
+}
+
 static inline bool raid1_add_bio_to_plug(struct mddev *mddev, struct bio *bio,
 				      blk_plug_cb_fn unplug)
 {
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index e86c5e71c604..0778e398584c 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -799,17 +799,8 @@ static void flush_bio_list(struct r1conf *conf, struct bio *bio)
 
 	while (bio) { /* submit pending writes */
 		struct bio *next = bio->bi_next;
-		struct md_rdev *rdev = (void *)bio->bi_bdev;
-		bio->bi_next = NULL;
-		bio_set_dev(bio, rdev->bdev);
-		if (test_bit(Faulty, &rdev->flags)) {
-			bio_io_error(bio);
-		} else if (unlikely((bio_op(bio) == REQ_OP_DISCARD) &&
-				    !bdev_max_discard_sectors(bio->bi_bdev)))
-			/* Just ignore it */
-			bio_endio(bio);
-		else
-			submit_bio_noacct(bio);
+
+		raid1_submit_write(bio);
 		bio = next;
 		cond_resched();
 	}
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index 18702051ebd1..6640507ecb0d 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -909,17 +909,8 @@ static void flush_pending_writes(struct r10conf *conf)
 
 		while (bio) { /* submit pending writes */
 			struct bio *next = bio->bi_next;
-			struct md_rdev *rdev = (void*)bio->bi_bdev;
-			bio->bi_next = NULL;
-			bio_set_dev(bio, rdev->bdev);
-			if (test_bit(Faulty, &rdev->flags)) {
-				bio_io_error(bio);
-			} else if (unlikely((bio_op(bio) ==  REQ_OP_DISCARD) &&
-					    !bdev_max_discard_sectors(bio->bi_bdev)))
-				/* Just ignore it */
-				bio_endio(bio);
-			else
-				submit_bio_noacct(bio);
+
+			raid1_submit_write(bio);
 			bio = next;
 			cond_resched();
 		}
@@ -1134,17 +1125,8 @@ static void raid10_unplug(struct blk_plug_cb *cb, bool from_schedule)
 
 	while (bio) { /* submit pending writes */
 		struct bio *next = bio->bi_next;
-		struct md_rdev *rdev = (void*)bio->bi_bdev;
-		bio->bi_next = NULL;
-		bio_set_dev(bio, rdev->bdev);
-		if (test_bit(Faulty, &rdev->flags)) {
-			bio_io_error(bio);
-		} else if (unlikely((bio_op(bio) ==  REQ_OP_DISCARD) &&
-				    !bdev_max_discard_sectors(bio->bi_bdev)))
-			/* Just ignore it */
-			bio_endio(bio);
-		else
-			submit_bio_noacct(bio);
+
+		raid1_submit_write(bio);
 		bio = next;
 		cond_resched();
 	}
-- 
2.39.2