From mboxrd@z Thu Jan 1 00:00:00 1970 From: NeilBrown Subject: [PATCH 08/24] dm-raid456: add support for raising events to userspace. Date: Tue, 01 Jun 2010 19:56:19 +1000 Message-ID: <20100601095619.565.20123.stgit@notabene.brown> References: <20100601094414.565.3638.stgit@notabene.brown> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20100601094414.565.3638.stgit@notabene.brown> Sender: linux-raid-owner@vger.kernel.org To: Heinz Mauelshagen , Alasdair G Kergon Cc: linux-raid@vger.kernel.org, dm-devel@redhat.com List-Id: dm-devel.ids Userspace needs to know about failure events. DM handles though through the DM_DEV_WAIT_CMD ioctl. So allow md_error to be given some work to do on an error, and arrange that work to signal dm. Signed-off-by: NeilBrown --- drivers/md/dm-raid456.c | 8 ++++++++ drivers/md/md.c | 2 ++ drivers/md/md.h | 1 + 3 files changed, 11 insertions(+), 0 deletions(-) diff --git a/drivers/md/dm-raid456.c b/drivers/md/dm-raid456.c index 5185a8f..d54f901 100644 --- a/drivers/md/dm-raid456.c +++ b/drivers/md/dm-raid456.c @@ -139,6 +139,13 @@ static int dev_parms(struct raid_set *rs, char **argv) return 0; } +static void do_table_event(struct work_struct *ws) +{ + struct raid_set *rs = container_of(ws, struct raid_set, + md.event_work); + dm_table_event(rs->ti->table); +} + /* * Construct a RAID4/5/6 mapping: * Args: @@ -290,6 +297,7 @@ static int raid_ctr(struct dm_target *ti, unsigned argc, char **argv) if (rs->md.raid_disks - in_sync > rt->parity_devs) goto err; + INIT_WORK(&rs->md.event_work, do_table_event); ti->split_io = rs->md.chunk_sectors; ti->private = rs; diff --git a/drivers/md/md.c b/drivers/md/md.c index 4eccf4e..da860f7 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -6039,6 +6039,8 @@ void md_error(mddev_t *mddev, mdk_rdev_t *rdev) set_bit(MD_RECOVERY_INTR, &mddev->recovery); set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); md_wakeup_thread(mddev->thread); + if (mddev->event_work.func) + schedule_work(&mddev->event_work); md_new_event_inintr(mddev); } diff --git a/drivers/md/md.h b/drivers/md/md.h index 8e19e86..6318175 100644 --- a/drivers/md/md.h +++ b/drivers/md/md.h @@ -315,6 +315,7 @@ struct mddev_s struct bio *barrier; atomic_t flush_pending; struct work_struct barrier_work; + struct work_struct event_work; };