Patch "ocfs2: fix cluster hang after a node dies" has been added to the 4.14-stable tree

This is a note to let you know that I've just added the patch titled

ocfs2: fix cluster hang after a node dies

to the 4.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
ocfs2-fix-cluster-hang-after-a-node-dies.patch
and it can be found in the queue-4.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Changwei Ge <[email protected]>
Date: Wed, 15 Nov 2017 17:31:33 -0800
Subject: ocfs2: fix cluster hang after a node dies

From: Changwei Ge <[email protected]>

commit 1c01967116a678fed8e2c68a6ab82abc8effeddc upstream.

When a node dies, other live nodes have to choose a new master for an existed lock resource mastered by the dead node.

As for ocfs2/dlm implementation, this is done by function - dlm_move_lockres_to_recovery_list which marks those lock rsources as DLM_LOCK_RES_RECOVERING and manages them via a list from which DLM changes lock resource's master later.

So without invoking dlm_move_lockres_to_recovery_list, no master will be choosed after dlm recovery accomplishment since no lock resource can be found through ::resource list.

What's worse is that if DLM_LOCK_RES_RECOVERING is not marked for lock resources mastered a dead node, it will break up synchronization among nodes.

So invoke dlm_move_lockres_to_recovery_list again.

Fixs: 'commit ee8f7fcbe638 ("ocfs2/dlm: continue to purge recovery lockres when recovery master goes down")'

---
 fs/ocfs2/dlm/dlmrecovery.c |    1 +
 1 file changed, 1 insertion(+)

@@ -2419,6 +2419,7 @@ static void dlm_do_local_recovery_cleanu
 					dlm_lockres_put(res);
 					continue;
 				}
+				dlm_move_lockres_to_recovery_list(dlm, res);
 			} else if (res->owner == dlm->node_num) {
 				dlm_free_dead_locks(dlm, res, dead_node);
 				__dlm_lockres_calc_usage(dlm, res);

Patches currently in stable-queue which might be from [email protected] are

queue-4.14/ocfs2-fix-cluster-hang-after-a-node-dies.patch queue-4.14/ocfs2-should-wait-dio-before-inode-lock-in-ocfs2_setattr.patch