Make sure all changes to md/array_state are notified.
Changes in md/array_state could be of interest to a monitoring
program. So make sure all changes trigger a notification.
Exceptions:
changing active_idle to active is not reported because it
is frequent and not interesting.
changing active to active_idle is only reported on arrays
with externally managed metadata, as it is not interesting
otherwise.
Signed-off-by: Neil Brown <neilb@suse.de>
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 1442761..5b9d4fe 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -2716,8 +2716,10 @@
}
if (err)
return err;
- else
+ else {
+ sysfs_notify(&mddev->kobj, NULL, "array_state");
return len;
+ }
}
static struct md_sysfs_entry md_array_state =
__ATTR(array_state, S_IRUGO|S_IWUSR, array_state_show, array_state_store);
@@ -3408,7 +3410,11 @@
{
mddev_t *mddev = (mddev_t *) data;
- mddev->safemode = 1;
+ if (!atomic_read(&mddev->writes_pending)) {
+ mddev->safemode = 1;
+ if (mddev->external)
+ sysfs_notify(&mddev->kobj, NULL, "array_state");
+ }
md_wakeup_thread(mddev->thread);
}
@@ -3675,6 +3681,7 @@
mddev->changed = 1;
md_new_event(mddev);
+ sysfs_notify(&mddev->kobj, NULL, "array_state");
kobject_uevent(&mddev->gendisk->dev.kobj, KOBJ_CHANGE);
return 0;
}
@@ -3709,6 +3716,8 @@
md_wakeup_thread(mddev->thread);
md_wakeup_thread(mddev->sync_thread);
err = 0;
+ sysfs_notify(&mddev->kobj, NULL, "array_state");
+
} else
err = -EINVAL;
@@ -3879,6 +3888,7 @@
mdname(mddev));
err = 0;
md_new_event(mddev);
+ sysfs_notify(&mddev->kobj, NULL, "array_state");
out:
return err;
}
@@ -4876,8 +4886,9 @@
mddev->ro && mddev->pers) {
if (mddev->ro == 2) {
mddev->ro = 0;
- set_bit(MD_RECOVERY_NEEDED, &mddev->recovery);
- md_wakeup_thread(mddev->thread);
+ sysfs_notify(&mddev->kobj, NULL, "array_state");
+ set_bit(MD_RECOVERY_NEEDED, &mddev->recovery);
+ md_wakeup_thread(mddev->thread);
} else {
err = -EROFS;
@@ -5516,6 +5527,7 @@
*/
void md_write_start(mddev_t *mddev, struct bio *bi)
{
+ int did_change = 0;
if (bio_data_dir(bi) != WRITE)
return;
@@ -5526,6 +5538,7 @@
set_bit(MD_RECOVERY_NEEDED, &mddev->recovery);
md_wakeup_thread(mddev->thread);
md_wakeup_thread(mddev->sync_thread);
+ did_change = 1;
}
atomic_inc(&mddev->writes_pending);
if (mddev->safemode == 1)
@@ -5536,10 +5549,12 @@
mddev->in_sync = 0;
set_bit(MD_CHANGE_CLEAN, &mddev->flags);
md_wakeup_thread(mddev->thread);
+ did_change = 1;
}
spin_unlock_irq(&mddev->write_lock);
- sysfs_notify(&mddev->kobj, NULL, "array_state");
}
+ if (did_change)
+ sysfs_notify(&mddev->kobj, NULL, "array_state");
wait_event(mddev->sb_wait,
!test_bit(MD_CHANGE_CLEAN, &mddev->flags) &&
!test_bit(MD_CHANGE_PENDING, &mddev->flags));
@@ -5991,18 +6006,22 @@
int spares = 0;
if (!mddev->external) {
+ int did_change = 0;
spin_lock_irq(&mddev->write_lock);
if (mddev->safemode &&
!atomic_read(&mddev->writes_pending) &&
!mddev->in_sync &&
mddev->recovery_cp == MaxSector) {
mddev->in_sync = 1;
+ did_change = 1;
if (mddev->persistent)
set_bit(MD_CHANGE_CLEAN, &mddev->flags);
}
if (mddev->safemode == 1)
mddev->safemode = 0;
spin_unlock_irq(&mddev->write_lock);
+ if (did_change)
+ sysfs_notify(&mddev->kobj, NULL, "array_state");
}
if (mddev->flags)
