ocfs2: gracefully handle stale create_lock messages.

This is an error on the sending side, so gracefully error out on the
receiving end.

Signed-off-by: Kurt Hackel <kurt.hackel@oracle.com>
Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>

1 files changed, 16 insertions, 3 deletions

diff --git a/fs/ocfs2/dlm/dlmlock.c b/fs/ocfs2/dlm/dlmlock.c
index 55cda25ae11b..57576208b79c 100644
--- a/fs/ocfs2/dlm/dlmlock.c
+++ b/fs/ocfs2/dlm/dlmlock.c
@@ -280,6 +280,14 @@ static enum dlm_status dlm_send_remote_lock_request(struct dlm_ctxt *dlm,
         if (tmpret >= 0) {
                 // successfully sent and received
                 ret = status;  // this is already a dlm_status
+                if (ret == DLM_RECOVERING) {
+                        mlog(ML_ERROR, "%s:%.*s: BUG.  this is a stale lockres "
+                             "no longer owned by %u.  that node is coming back "
+                             "up currently.\n", dlm->name, create.namelen,
+                             create.name, res->owner);
+                        dlm_print_one_lock_resource(res);
+                        BUG();
+                }
         } else {
                 mlog_errno(tmpret);
                 if (dlm_is_host_down(tmpret)) {
@@ -428,11 +436,16 @@ int dlm_create_lock_handler(struct o2net_msg *msg, u32 len, void *data)
         if (!dlm_grab(dlm))
                 return DLM_REJECTED;
 
-        mlog_bug_on_msg(!dlm_domain_fully_joined(dlm),
-                        "Domain %s not fully joined!\n", dlm->name);
-
         name = create->name;
         namelen = create->namelen;
+        status = DLM_RECOVERING;
+        if (!dlm_domain_fully_joined(dlm)) {
+                mlog(ML_ERROR, "Domain %s not fully joined, but node %u is "
+                     "sending a create_lock message for lock %.*s!\n",
+                     dlm->name, create->node_idx, namelen, name);
+                dlm_error(status);
+                goto leave;
+        }
 
         status = DLM_IVBUFLEN;
         if (namelen > DLM_LOCKID_NAME_MAX) {