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authorPhilipp Reisner <philipp.reisner@linbit.com>2011-11-10 12:12:52 +0100
committerPhilipp Reisner <philipp.reisner@linbit.com>2012-11-08 16:58:05 +0100
commit0cfac5dd904ec8b376beb27f6ad265b12d71bf9e (patch)
tree91f100e963ae038e7bc410eb0b4ba7beb61eae72 /drivers/block/drbd/drbd_main.c
parent376694a0543f5da194d9c6e102cfcd023ffac949 (diff)
drbd: Fixes from the drbd-8.3 branch
* drbd-8.3: drbd: fix spurious meta data IO "error" drbd: Fixed a race condition between detach and start of resync drbd: fix harmless race to not trigger an ASSERT drbd: Derive sync-UUIDs only from the bitmap-uuid if it is non-zero drbd: Fixed current UUID generation (regression introduced recently, after 8.3.11) Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Diffstat (limited to 'drivers/block/drbd/drbd_main.c')
-rw-r--r--drivers/block/drbd/drbd_main.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c
index edd0227f4b4..822fb3d4235 100644
--- a/drivers/block/drbd/drbd_main.c
+++ b/drivers/block/drbd/drbd_main.c
@@ -1087,7 +1087,11 @@ void drbd_gen_and_send_sync_uuid(struct drbd_conf *mdev)
D_ASSERT(mdev->state.disk == D_UP_TO_DATE);
- uuid = mdev->ldev->md.uuid[UI_BITMAP] + UUID_NEW_BM_OFFSET;
+ uuid = mdev->ldev->md.uuid[UI_BITMAP];
+ if (uuid && uuid != UUID_JUST_CREATED)
+ uuid = uuid + UUID_NEW_BM_OFFSET;
+ else
+ get_random_bytes(&uuid, sizeof(u64));
drbd_uuid_set(mdev, UI_BITMAP, uuid);
drbd_print_uuids(mdev, "updated sync UUID");
drbd_md_sync(mdev);