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Make sure all changes to md/degraded are notified.

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When a device fails, when a spare is activated, when
an array is reshaped, or when an array is started,
the extent to which the array is degraded can change.

Signed-off-by: Neil Brown <neilb@suse.de>
This commit is contained in:
Neil Brown 2008-06-28 08:31:43 +10:00
parent 72a23c211e
commit a99ac97113
2 changed files with 12 additions and 1 deletions
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7
Documentation/md.txt
View File

@ -392,6 +392,13 @@ also have
achieved. In that case, the transition to "recover" isn't achieved. In that case, the transition to "recover" isn't
notified, but the transition away is. notified, but the transition away is.
degraded
This contains a count of the number of devices by which the
arrays is degraded. So an optimal array with show '0'. A
single failed/missing drive will show '1', etc.
This file responds to select/poll, any increase or decrease
in the count of missing devices will trigger an event.
mismatch_count mismatch_count
When performing 'check' and 'repair', and possibly when When performing 'check' and 'repair', and possibly when
performing 'resync', md will count the number of errors that are performing 'resync', md will count the number of errors that are

6
drivers/md/md.c
View File

@ -2969,6 +2969,7 @@ action_store(mddev_t *mddev, const char *page, size_t len)
err = mddev->pers->start_reshape(mddev); err = mddev->pers->start_reshape(mddev);
if (err) if (err)
return err; return err;
sysfs_notify(&mddev->kobj, NULL, "degraded");
} else { } else {
if (cmd_match(page, "check")) if (cmd_match(page, "check"))
set_bit(MD_RECOVERY_CHECK, &mddev->recovery); set_bit(MD_RECOVERY_CHECK, &mddev->recovery);
@ -3686,6 +3687,7 @@ static int do_md_run(mddev_t * mddev)
md_new_event(mddev); md_new_event(mddev);
sysfs_notify(&mddev->kobj, NULL, "array_state"); sysfs_notify(&mddev->kobj, NULL, "array_state");
sysfs_notify(&mddev->kobj, NULL, "sync_action"); sysfs_notify(&mddev->kobj, NULL, "sync_action");
sysfs_notify(&mddev->kobj, NULL, "degraded");
kobject_uevent(&mddev->gendisk->dev.kobj, KOBJ_CHANGE); kobject_uevent(&mddev->gendisk->dev.kobj, KOBJ_CHANGE);
return 0; return 0;
} }
@ -6049,7 +6051,9 @@ void md_check_recovery(mddev_t *mddev)
if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery)) { if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery)) {
/* success...*/ /* success...*/
/* activate any spares */ /* activate any spares */
mddev->pers->spare_active(mddev); if (mddev->pers->spare_active(mddev))
sysfs_notify(&mddev->kobj, NULL,
"degraded");
} }
md_update_sb(mddev, 1); md_update_sb(mddev, 1);