From: Yu Kuai <yukuai3@xxxxxxxxxx> There are no functional changes, the new api will be used later to do special handling for raid456 in md_suspend(). Signed-off-by: Yu Kuai <yukuai3@xxxxxxxxxx> --- drivers/md/md.c | 4 ++++ drivers/md/md.h | 1 + 2 files changed, 5 insertions(+) diff --git a/drivers/md/md.c b/drivers/md/md.c index 5db26b7e7314..1ef81421e131 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -467,6 +467,10 @@ 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); diff --git a/drivers/md/md.h b/drivers/md/md.h index 7827f27c1406..15d82517572e 100644 --- a/drivers/md/md.h +++ b/drivers/md/md.h @@ -639,6 +639,7 @@ 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 -- 2.39.2
