From: NeilBrown <neilb@suse.de>
To: Heinz Mauelshagen <heinzm@redhat.com>,
Alasdair G Kergon <agk@redhat.com>
Cc: linux-raid@vger.kernel.org, dm-devel@redhat.com
Subject: [PATCH 15/24] dm-raid456: add suspend/resume method
Date: Tue, 01 Jun 2010 19:56:20 +1000 [thread overview]
Message-ID: <20100601095619.565.58721.stgit@notabene.brown> (raw)
In-Reply-To: <20100601094414.565.3638.stgit@notabene.brown>
These just call in to the md methods.
Signed-off-by: NeilBrown <neilb@suse.de>
---
drivers/md/dm-raid456.c | 22 ++++++++++++++++++++++
drivers/md/md.c | 6 ++++--
drivers/md/md.h | 3 +++
3 files changed, 29 insertions(+), 2 deletions(-)
diff --git a/drivers/md/dm-raid456.c b/drivers/md/dm-raid456.c
index 0b72fa4..044faae 100644
--- a/drivers/md/dm-raid456.c
+++ b/drivers/md/dm-raid456.c
@@ -466,6 +466,25 @@ 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;
+ md_stop_writes(&rs->md);
+}
+
+static void raid_postsuspend(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},
@@ -476,6 +495,9 @@ static struct target_type raid_target = {
.status = raid_status,
.iterate_devices = raid_iterate_devices,
.io_hints = raid_io_hints,
+ .presuspend = raid_presuspend,
+ .postsuspend = raid_postsuspend,
+ .resume = raid_resume,
};
static int __init dm_raid_init(void)
diff --git a/drivers/md/md.c b/drivers/md/md.c
index ea6577b..21f3c35 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -261,7 +261,7 @@ 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;
@@ -269,13 +269,15 @@ 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 0bf8c18..6f2c568 100644
--- a/drivers/md/md.h
+++ b/drivers/md/md.h
@@ -512,4 +512,7 @@ extern int md_run(mddev_t *mddev);
extern void md_stop(mddev_t *mddev);
extern void md_stop_writes(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 */
next prev parent reply other threads:[~2010-06-01 9:56 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-06-01 9:56 [PATCH 00/24] dm-raid456 support using md/raid5.c, now with dirty-log NeilBrown
2010-06-01 9:56 ` [PATCH 03/24] md/raid5: ensure we create a unique name for kmem_cache when mddev has no gendisk NeilBrown
2010-06-01 9:56 ` [PATCH 02/24] md/raid5: factor out code for changing size of stripe cache NeilBrown
2010-06-01 9:56 ` [PATCH 01/24] md: reduce dependence on sysfs NeilBrown
2010-06-01 9:56 ` [PATCH 13/24] dm-raid456: support unplug NeilBrown
2010-06-01 9:56 ` [PATCH 04/24] md: be more careful setting MD_CHANGE_CLEAN NeilBrown
2010-06-01 9:56 ` [PATCH 07/24] md/dm: create dm-raid456 module using md/raid5 NeilBrown
2010-06-01 9:56 ` [PATCH 05/24] md: split out md_rdev_init NeilBrown
2010-06-01 9:56 ` [PATCH 12/24] md/plug: optionally use plugger to unplug an array during resync/recovery NeilBrown
2010-06-01 9:56 ` [PATCH 11/24] md/raid5: add simple plugging infrastructure NeilBrown
2010-06-01 9:56 ` [PATCH 10/24] dm-raid456: add congestion checking NeilBrown
2010-06-01 9:56 ` [PATCH 14/24] dm-raid456: add support for setting IO hints NeilBrown
2010-06-01 9:56 ` [PATCH 06/24] md: export various start/stop interfaces NeilBrown
2010-06-01 9:56 ` [PATCH 09/24] raid5: Don't set read-ahead when there is no queue NeilBrown
2010-06-01 9:56 ` [PATCH 08/24] dm-raid456: add support for raising events to userspace NeilBrown
2010-06-01 9:56 ` [PATCH 19/24] md/bitmap: clean up plugging calls NeilBrown
2010-06-01 9:56 ` [PATCH 24/24] dm-raid456: switch to use dm_dirty_log for tracking dirty regions NeilBrown
2010-06-01 9:56 ` [PATCH 20/24] md/bitmap: optimise scanning of empty bitmaps NeilBrown
2010-06-01 9:56 ` NeilBrown [this message]
2010-06-01 9:56 ` [PATCH 18/24] md/bitmap: reduce dependence on sysfs NeilBrown
2010-06-01 9:56 ` [PATCH 22/24] md/bitmap: prepare for storing write-intent-bitmap via dm-dirty-log NeilBrown
2010-06-01 9:56 ` [PATCH 16/24] dm-raid456: add message handler NeilBrown
2010-06-01 9:56 ` [PATCH 17/24] md/bitmap: white space clean up and similar NeilBrown
2010-06-01 9:56 ` [PATCH 23/24] md/bitmap: separate out loading a bitmap from initialising the structures NeilBrown
2010-06-01 9:56 ` [PATCH 21/24] dm-dirty-log: allow log size to be different from target size NeilBrown
2010-06-02 14:57 ` Heinz Mauelshagen
2010-06-03 0:10 ` [dm-devel] " Neil Brown
2010-06-03 0:53 ` Heinz Mauelshagen
2010-06-15 13:23 ` [PATCH 00/24] dm-raid456 support using md/raid5.c, now with dirty-log Heinz Mauelshagen
2010-06-15 23:45 ` Neil Brown
2010-06-16 11:26 ` Heinz Mauelshagen
2010-06-17 5:41 ` Neil Brown
2010-06-17 10:47 ` Heinz Mauelshagen
2010-06-18 3:52 ` Neil Brown
2010-06-18 10:42 ` Heinz Mauelshagen
2010-06-21 23:09 ` Neil Brown
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