From: Philipp Reisner <philipp.reisner@linbit.com>
Date: Mon, 21 Jun 2010 12:14:15 +0000 (+0200)
Subject: drbd: Now we need to handle the ed_uuid of an diskless, unconnected primary correctly
X-Git-Tag: firefly_0821_release~7613^2~3690^2~66
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=18a50fa213d46d5592f6542c91ab4c4760cf346c;p=firefly-linux-kernel-4.4.55.git

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>
---

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