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drbd: Derive sync-UUIDs only from the bitmap-uuid if it is non-zero

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Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
This commit is contained in:
Philipp Reisner 2011-10-05 15:54:18 +02:00
commit 5ba3dac521
1 changed files with 5 additions and 1 deletions
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6
drivers/block/drbd/drbd_main.c
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@ -2138,7 +2138,11 @@ int 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);