linux-kernel - [PATCH -next v2 22/28] md: use new apis to suspend array related to serial pool in state

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Message-Id: <20230828020021.2489641-23-yukuai1@huaweicloud.com>
Date:   Mon, 28 Aug 2023 10:00:15 +0800
From:   Yu Kuai <yukuai1@...weicloud.com>
To:     agk@...hat.com, snitzer@...nel.org, dm-devel@...hat.com,
        song@...nel.org, xni@...hat.com
Cc:     linux-kernel@...r.kernel.org, linux-raid@...r.kernel.org,
        yukuai3@...wei.com, yukuai1@...weicloud.com, yi.zhang@...wei.com,
        yangerkun@...wei.com
Subject: [PATCH -next v2 22/28] md: use new apis to suspend array related to serial pool in state_store()

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

mddev_create/destroy_serial_pool() will be called from state_store() if
user write 'writemostly'/'-writemostly', and mddev_suspend() will be
called later.

Prepare to remove the mddev_suspend() from
mddev_create/destroy_serial_pool().

Signed-off-by: Yu Kuai <yukuai3@...wei.com>
---
 drivers/md/md.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/md/md.c b/drivers/md/md.c
index 43bd7274b705..305694b67fd7 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -3055,11 +3055,11 @@ state_store(struct md_rdev *rdev, const char *buf, size_t len)
 		}
 	} else if (cmd_match(buf, "writemostly")) {
 		set_bit(WriteMostly, &rdev->flags);
-		mddev_create_serial_pool(rdev->mddev, rdev, false);
+		mddev_create_serial_pool(rdev->mddev, rdev, true);
 		need_update_sb = true;
 		err = 0;
 	} else if (cmd_match(buf, "-writemostly")) {
-		mddev_destroy_serial_pool(rdev->mddev, rdev, false);
+		mddev_destroy_serial_pool(rdev->mddev, rdev, true);
 		clear_bit(WriteMostly, &rdev->flags);
 		need_update_sb = true;
 		err = 0;
@@ -3683,7 +3683,9 @@ rdev_attr_store(struct kobject *kobj, struct attribute *attr,
 	if (entry->store == state_store) {
 		if (cmd_match(page, "remove"))
 			kn = sysfs_break_active_protection(kobj, attr);
-		if (cmd_match(page, "remove") || cmd_match(page, "re-add")) {
+		if (cmd_match(page, "remove") || cmd_match(page, "re-add") ||
+		    cmd_match(page, "writemostly") ||
+		    cmd_match(page, "-writemostly")) {
 			__mddev_suspend(mddev);
 			suspended = true;
 		}
-- 
2.39.2