linux-kernel - [PATCH 1/1] md: Do only necessary operations when adding device to RO array

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <84A53BEA6EAC69439B7E311E9B17A76F07918CF7@IRSMSX105.ger.corp.intel.com>
Date:	Fri, 30 May 2014 14:39:04 +0000
From:	"Baldysiak, Pawel" <pawel.baldysiak@...el.com>
To:	"neilb@...e.de" <neilb@...e.de>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-raid@...r.kernel.org" <linux-raid@...r.kernel.org>,
	"Paszkiewicz, Artur" <artur.paszkiewicz@...el.com>
Subject: [PATCH 1/1] md: Do only necessary operations when adding device to
 RO array

Commit 8313b8e57f55b15e5b7f7fc5d1630bbf686a9a97 changed
way of adding device to read-only array. Used routine
md_reap_sync_thread() which also trigger finish_reshape(),
can break reshape process, if it was restarted.
This part of function should do only necessary operations, that is:
1) call ->spare_active
2) clear saved_raid_disk if array is no longer degraded

Signed-off-by: Pawel Baldysiak <pawel.baldysiak@...el.com>
Reviewed-by: Artur Paszkiewicz <artur.paszkiewicz@...el.com>

---
drivers/md/md.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/md/md.c b/drivers/md/md.c
index 237b7e0..cf073de2 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -7820,11 +7820,13 @@ void md_check_recovery(struct mddev *mddev)
                                                * As we only add devices that are already in-sync,
                                                * we can activate the spares immediately.
                                                */
+                                             struct md_rdev *rdev;
                                               remove_and_add_spares(mddev, NULL);
-                                              /* There is no thread, but we need to call
-                                              * ->spare_active and clear saved_raid_disk
-                                              */
-                                              md_reap_sync_thread(mddev);
+                                             mddev->pers->spare_active(mddev);
+                                             rdev_for_each(rdev, mddev)
+                                                             if (!mddev->degraded ||
+                                                                 test_bit(In_sync, &rdev->flags))
+                                                                             rdev->saved_raid_disk = -1;
                                               clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery);
                                               goto unlock;
                               }
-- 
1.9.0
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/