linux-kernel - [PATCH v4 1/2] md: add helper rdev_needs

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Message-Id: <20250816002534.1754356-2-zhengqixing@huaweicloud.com>
Date: Sat, 16 Aug 2025 08:25:33 +0800
From: Zheng Qixing <zhengqixing@...weicloud.com>
To: song@...nel.org,
	yukuai3@...wei.com,
	linan122@...wei.com
Cc: linux-raid@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	yi.zhang@...wei.com,
	yangerkun@...wei.com,
	houtao1@...wei.com,
	zhengqixing@...wei.com,
	pmenzel@...gen.mpg.de
Subject: [PATCH v4 1/2] md: add helper rdev_needs_recovery()

From: Zheng Qixing <zhengqixing@...wei.com>

Add a helper for checking if an rdev needs recovery.

Signed-off-by: Zheng Qixing <zhengqixing@...wei.com>
---
 drivers/md/md.c | 23 ++++++++++++-----------
 1 file changed, 12 insertions(+), 11 deletions(-)

diff --git a/drivers/md/md.c b/drivers/md/md.c
index ac85ec73a409..3fcb061dd713 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -4835,6 +4835,15 @@ metadata_store(struct mddev *mddev, const char *buf, size_t len)
 static struct md_sysfs_entry md_metadata =
 __ATTR_PREALLOC(metadata_version, S_IRUGO|S_IWUSR, metadata_show, metadata_store);
 
+static bool rdev_needs_recovery(struct md_rdev *rdev, sector_t sectors)
+{
+	return rdev->raid_disk >= 0 &&
+	       !test_bit(Journal, &rdev->flags) &&
+	       !test_bit(Faulty, &rdev->flags) &&
+	       !test_bit(In_sync, &rdev->flags) &&
+	       rdev->recovery_offset < sectors;
+}
+
 enum sync_action md_sync_action(struct mddev *mddev)
 {
 	unsigned long recovery = mddev->recovery;
@@ -8968,11 +8977,7 @@ static sector_t md_sync_position(struct mddev *mddev, enum sync_action action)
 		start = MaxSector;
 		rcu_read_lock();
 		rdev_for_each_rcu(rdev, mddev)
-			if (rdev->raid_disk >= 0 &&
-			    !test_bit(Journal, &rdev->flags) &&
-			    !test_bit(Faulty, &rdev->flags) &&
-			    !test_bit(In_sync, &rdev->flags) &&
-			    rdev->recovery_offset < start)
+			if (rdev_needs_recovery(rdev, start))
 				start = rdev->recovery_offset;
 		rcu_read_unlock();
 
@@ -9331,12 +9336,8 @@ void md_do_sync(struct md_thread *thread)
 			    test_bit(MD_RECOVERY_RECOVER, &mddev->recovery)) {
 				rcu_read_lock();
 				rdev_for_each_rcu(rdev, mddev)
-					if (rdev->raid_disk >= 0 &&
-					    mddev->delta_disks >= 0 &&
-					    !test_bit(Journal, &rdev->flags) &&
-					    !test_bit(Faulty, &rdev->flags) &&
-					    !test_bit(In_sync, &rdev->flags) &&
-					    rdev->recovery_offset < mddev->curr_resync)
+					if (mddev->delta_disks >= 0 &&
+					    rdev_needs_recovery(rdev, mddev->curr_resync))
 						rdev->recovery_offset = mddev->curr_resync;
 				rcu_read_unlock();
 			}
-- 
2.39.2