linux-kernel - [PATCH -next 04/13] md: factor out a helper rdev_addable() from remove_and_add

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Message-Id: <20230803132426.2688608-5-yukuai1@huaweicloud.com>
Date:   Thu,  3 Aug 2023 21:24:17 +0800
From:   Yu Kuai <yukuai1@...weicloud.com>
To:     song@...nel.org, xni@...hat.com
Cc:     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 04/13] md: factor out a helper rdev_addable() from remove_and_add_spares()

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

There are no functional changes, just to make the code simpler and
prepare to refactoer remove_and_add_spares().

Signed-off-by: Yu Kuai <yukuai3@...wei.com>
---
 drivers/md/md.c | 28 ++++++++++++++++------------
 1 file changed, 16 insertions(+), 12 deletions(-)

diff --git a/drivers/md/md.c b/drivers/md/md.c
index 0e4967f17115..8017371a9e53 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -9157,6 +9157,20 @@ static bool rdev_removeable(struct md_rdev *rdev)
 	       !atomic_read(&rdev->nr_pending);
 }
 
+static bool rdev_addable(struct md_rdev *rdev)
+{
+	if (test_bit(Candidate, &rdev->flags) || rdev->raid_disk >= 0 ||
+	    test_bit(Faulty, &rdev->flags))
+		return false;
+
+	if (!test_bit(Journal, &rdev->flags) && !md_is_rdwr(rdev->mddev) &&
+	    !(rdev->saved_raid_disk >= 0 &&
+	      !test_bit(Bitmap_sync, &rdev->flags)))
+		return false;
+
+	return true;
+}
+
 static bool rdev_is_spare(struct md_rdev *rdev)
 {
 	return !test_bit(Candidate, &rdev->flags) && rdev->raid_disk >= 0 &&
@@ -9197,20 +9211,10 @@ static int remove_and_add_spares(struct mddev *mddev,
 			continue;
 		if (rdev_is_spare(rdev))
 			spares++;
-		if (test_bit(Candidate, &rdev->flags))
+		if (!rdev_addable(rdev))
 			continue;
-		if (rdev->raid_disk >= 0)
-			continue;
-		if (test_bit(Faulty, &rdev->flags))
-			continue;
-		if (!test_bit(Journal, &rdev->flags)) {
-			if (!md_is_rdwr(mddev) &&
-			    !(rdev->saved_raid_disk >= 0 &&
-			      !test_bit(Bitmap_sync, &rdev->flags)))
-				continue;
-
+		if (!test_bit(Journal, &rdev->flags))
 			rdev->recovery_offset = 0;
-		}
 		if (mddev->pers->hot_add_disk(mddev, rdev) == 0) {
 			/* failure here is OK */
 			sysfs_link_rdev(mddev, rdev);
-- 
2.39.2