From mboxrd@z Thu Jan 1 00:00:00 1970 From: NeilBrown Subject: [PATCH 007 of 10] md: notify userspace on 'stop' events Date: Mon, 19 May 2008 11:10:50 +1000 Message-ID: <1080519011050.7741@suse.de> References: <20080519110910.7473.patches@notabene> Return-path: Sender: linux-raid-owner@vger.kernel.org To: Andrew Morton Cc: linux-raid@vger.kernel.org, linux-kernel@vger.kernel.org, Dan Williams List-Id: linux-raid.ids From: Dan Williams This additional notification to 'array_state' is needed to allow the monitor application to learn about stop events via sysfs. The sysfs_notify("sync_action") call that comes at the end of do_md_stop() (via md_new_event) is insufficient since the 'sync_action' attribute has been removed by this point. (Seems like a sysfs-notify-on-removal patch is a better fix. Currently removal updates the event count but does not wake up waiters) Signed-off-by: Dan Williams Signed-off-by: Neil Brown ### Diffstat output ./drivers/md/md.c | 2 ++ 1 file changed, 2 insertions(+) diff .prev/drivers/md/md.c ./drivers/md/md.c --- .prev/drivers/md/md.c 2008-05-19 11:03:43.000000000 +1000 +++ ./drivers/md/md.c 2008-05-19 11:03:47.000000000 +1000 @@ -3691,6 +3691,8 @@ static int do_md_stop(mddev_t * mddev, i module_put(mddev->pers->owner); mddev->pers = NULL; + /* tell userspace to handle 'inactive' */ + sysfs_notify(&mddev->kobj, NULL, "array_state"); set_capacity(disk, 0); mddev->changed = 1;