[PATCH v5 11/14] dm-raid: add a new helper prepare_suspend() in md_personality
From: Yu Kuai <hidden>
Date: 2024-02-01 09:30:36
Also in:
dm-devel, lkml
Subsystem:
device-mapper (lvm), software raid (multiple disks) support, the rest · Maintainers:
Alasdair Kergon, Mike Snitzer, Mikulas Patocka, Benjamin Marzinski, Song Liu, Yu Kuai, Linus Torvalds
From: Yu Kuai <redacted> There are no functional changes for now, prepare to fix a deadlock for dm-raid456. Signed-off-by: Yu Kuai <redacted> --- drivers/md/dm-raid.c | 10 +++++++--- drivers/md/md.h | 1 + 2 files changed, 8 insertions(+), 3 deletions(-)
diff --git a/drivers/md/dm-raid.c b/drivers/md/dm-raid.c
index 6b6c011d9f69..16d3348abfed 100644
--- a/drivers/md/dm-raid.c
+++ b/drivers/md/dm-raid.c@@ -3806,10 +3806,14 @@ static void raid_io_hints(struct dm_target *ti, struct queue_limits *limits) static void raid_presuspend(struct dm_target *ti) { struct raid_set *rs = ti->private; + struct mddev *mddev = &rs->md; - mddev_lock_nointr(&rs->md); - md_frozen_sync_thread(&rs->md); - mddev_unlock(&rs->md); + mddev_lock_nointr(mddev); + md_frozen_sync_thread(mddev); + mddev_unlock(mddev); + + if (mddev->pers && mddev->pers->prepare_suspend) + mddev->pers->prepare_suspend(mddev); } static void raid_presuspend_undo(struct dm_target *ti)
diff --git a/drivers/md/md.h b/drivers/md/md.h
index 684cc866402a..8e81f9e2fb20 100644
--- a/drivers/md/md.h
+++ b/drivers/md/md.h@@ -629,6 +629,7 @@ struct md_personality int (*start_reshape) (struct mddev *mddev); void (*finish_reshape) (struct mddev *mddev); void (*update_reshape_pos) (struct mddev *mddev); + void (*prepare_suspend) (struct mddev *mddev); /* quiesce suspends or resumes internal processing. * 1 - stop new actions and wait for action io to complete * 0 - return to normal behaviour
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2.39.2