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md: notify userspace on 'stop' events

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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 <dan.j.williams@intel.com>
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Dan Williams 2008-05-23 13:04:37 -07:00 committed by Linus Torvalds
parent 09a44cc150
commit 4f54b0e948
1 changed files with 2 additions and 0 deletions
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2
drivers/md/md.c
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@ -3691,6 +3691,8 @@ static int do_md_stop(mddev_t * mddev, int mode)
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;