From mboxrd@z Thu Jan 1 00:00:00 1970 From: NeilBrown Subject: [PATCH 016 of 29] md: Make sure all changes to md/degraded are notified. Date: Fri, 27 Jun 2008 16:51:04 +1000 Message-ID: <1080627065104.10562@suse.de> References: <20080627164503.9671.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 List-Id: linux-raid.ids 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 ### Diffstat output ./Documentation/md.txt | 7 +++++++ ./drivers/md/md.c | 6 +++++- 2 files changed, 12 insertions(+), 1 deletion(-) diff .prev/Documentation/md.txt ./Documentation/md.txt --- .prev/Documentation/md.txt 2008-06-27 16:22:02.000000000 +1000 +++ ./Documentation/md.txt 2008-06-27 16:22:02.000000000 +1000 @@ -392,6 +392,13 @@ also have achieved. In that case, the transition to "recover" isn't 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 When performing 'check' and 'repair', and possibly when performing 'resync', md will count the number of errors that are diff .prev/drivers/md/md.c ./drivers/md/md.c --- .prev/drivers/md/md.c 2008-06-27 16:22:02.000000000 +1000 +++ ./drivers/md/md.c 2008-06-27 16:22:02.000000000 +1000 @@ -2969,6 +2969,7 @@ action_store(mddev_t *mddev, const char err = mddev->pers->start_reshape(mddev); if (err) return err; + sysfs_notify(&mddev->kobj, NULL, "degraded"); } else { if (cmd_match(page, "check")) set_bit(MD_RECOVERY_CHECK, &mddev->recovery); @@ -3686,6 +3687,7 @@ static int do_md_run(mddev_t * mddev) md_new_event(mddev); sysfs_notify(&mddev->kobj, NULL, "array_state"); sysfs_notify(&mddev->kobj, NULL, "sync_action"); + sysfs_notify(&mddev->kobj, NULL, "degraded"); kobject_uevent(&mddev->gendisk->dev.kobj, KOBJ_CHANGE); return 0; } @@ -6049,7 +6051,9 @@ void md_check_recovery(mddev_t *mddev) if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery)) { /* success...*/ /* 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);