From mboxrd@z Thu Jan 1 00:00:00 1970 From: NeilBrown Subject: [PATCH 11/12] dm-raid456: add suspend/resume method Date: Thu, 15 Apr 2010 16:43:02 +1000 Message-ID: <20100415064302.15646.44263.stgit@notabene.brown> References: <20100415062909.15646.16.stgit@notabene.brown> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20100415062909.15646.16.stgit@notabene.brown> Sender: linux-raid-owner@vger.kernel.org To: dm-devel@redhat.com Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids These just call in to the md methods. Signed-off-by: NeilBrown --- drivers/md/dm-raid456.c | 15 +++++++++++++++ drivers/md/md.c | 6 ++++-- drivers/md/md.h | 3 +++ 3 files changed, 22 insertions(+), 2 deletions(-) diff --git a/drivers/md/dm-raid456.c b/drivers/md/dm-raid456.c index 071a8ae..126042d 100644 --- a/drivers/md/dm-raid456.c +++ b/drivers/md/dm-raid456.c @@ -465,6 +465,19 @@ static void raid_io_hints(struct dm_target *ti, (conf->raid_disks - conf->max_degraded)); } +static void raid_presuspend(struct dm_target *ti) +{ + struct raid_set *rs = ti->private; + mddev_suspend(&rs->md); +} + +static void raid_resume(struct dm_target *ti) +{ + struct raid_set *rs = ti->private; + + mddev_resume(&rs->md); +} + static struct target_type raid_target = { .name = "raid45", .version = {1, 0, 0}, @@ -475,6 +488,8 @@ static struct target_type raid_target = { .status = raid_status, .iterate_devices = raid_iterate_devices, .io_hints = raid_io_hints, + .presuspend = raid_presuspend, + .resume = raid_resume, }; static int __init dm_raid_init(void) diff --git a/drivers/md/md.c b/drivers/md/md.c index b292dc5..098f72c 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -260,7 +260,7 @@ static int md_make_request(struct request_queue *q, struct bio *bio) * Once ->stop is called and completes, the module will be completely * unused. */ -static void mddev_suspend(mddev_t *mddev) +void mddev_suspend(mddev_t *mddev) { BUG_ON(mddev->suspended); mddev->suspended = 1; @@ -268,13 +268,15 @@ static void mddev_suspend(mddev_t *mddev) wait_event(mddev->sb_wait, atomic_read(&mddev->active_io) == 0); mddev->pers->quiesce(mddev, 1); } +EXPORT_SYMBOL_GPL(mddev_suspend); -static void mddev_resume(mddev_t *mddev) +void mddev_resume(mddev_t *mddev) { mddev->suspended = 0; wake_up(&mddev->sb_wait); mddev->pers->quiesce(mddev, 0); } +EXPORT_SYMBOL_GPL(mddev_resume); int mddev_congested(mddev_t *mddev, int bits) { diff --git a/drivers/md/md.h b/drivers/md/md.h index e4f60ae..fac75bd 100644 --- a/drivers/md/md.h +++ b/drivers/md/md.h @@ -506,4 +506,7 @@ extern void mddev_init(mddev_t *mddev); extern int md_run(mddev_t *mddev); extern void md_stop(mddev_t *mddev); extern void md_rdev_init(mdk_rdev_t *rdev); + +extern void mddev_suspend(mddev_t *mddev); +extern void mddev_resume(mddev_t *mddev); #endif /* _MD_MD_H */