drbd: Now we need to handle the ed_uuid of an diskless, unconnected primary correctly

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>

2 files changed, 8 insertions, 1 deletions

diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c
index 106b9abdc430..c701805ed4b9 100644
--- a/drivers/block/drbd/drbd_main.c
+++ b/drivers/block/drbd/drbd_main.c
@@ -1297,8 +1297,10 @@ static void after_state_ch(struct drbd_conf *mdev, union drbd_state os,
         }
 
         if (ns.pdsk < D_INCONSISTENT && get_ldev(mdev)) {
-                if (ns.peer == R_PRIMARY && mdev->ldev->md.uuid[UI_BITMAP] == 0)
+                if (ns.peer == R_PRIMARY && mdev->ldev->md.uuid[UI_BITMAP] == 0) {
                         drbd_uuid_new_current(mdev);
+                        drbd_send_uuids(mdev);
+                }
 
                 /* D_DISKLESS Peer becomes secondary */
                 if (os.peer == R_PRIMARY && ns.peer == R_SECONDARY)
diff --git a/drivers/block/drbd/drbd_receiver.c b/drivers/block/drbd/drbd_receiver.c
index 8daa920c40a4..72bc1a130645 100644
--- a/drivers/block/drbd/drbd_receiver.c
+++ b/drivers/block/drbd/drbd_receiver.c
@@ -3104,6 +3104,11 @@ static int receive_uuids(struct drbd_conf *mdev, struct p_header *h)
                         drbd_md_sync(mdev);
                 }
                 put_ldev(mdev);
+        } else if (mdev->state.disk < D_INCONSISTENT &&
+                   mdev->state.role == R_PRIMARY) {
+                /* I am a diskless primary, the peer just created a new current UUID
+                   for me. */
+                drbd_set_ed_uuid(mdev, p_uuid[UI_CURRENT]);
         }
 
         /* Before we test for the disk state, we should wait until an eventually