Commit 3e00777d authored by Yu Kuai's avatar Yu Kuai Committed by Song Liu
Browse files

md: add a new api prepare_suspend() in md_personality 



There are no functional changes, the new api will be used later to do
special handling for raid456 in md_suspend().

Signed-off-by: default avatarYu Kuai <yukuai3@huawei.com>
Signed-off-by: default avatarSong Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20230512015610.821290-5-yukuai1@huaweicloud.com
parent 431e6125

drivers/md/md.c

+4 −0
Original line number Diff line number Diff line
@@ -448,6 +448,10 @@ void mddev_suspend(struct mddev *mddev) 
	wake_up(&mddev->sb_wait);

	set_bit(MD_ALLOW_SB_UPDATE, &mddev->flags);

	percpu_ref_kill(&mddev->active_io);



	if (mddev->pers->prepare_suspend)

		mddev->pers->prepare_suspend(mddev);



	wait_event(mddev->sb_wait, percpu_ref_is_zero(&mddev->active_io));

	mddev->pers->quiesce(mddev, 1);

	clear_bit_unlock(MD_ALLOW_SB_UPDATE, &mddev->flags);

drivers/md/md.h

+1 −0
Original line number Diff line number Diff line
@@ -631,6 +631,7 @@ 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