ocfs2/dlm: Expose dlm_protocol in dlm_state

[~andy/linux] / fs / ocfs2 / dlm / dlmdebug.c

diff --git a/fs/ocfs2/dlm/dlmdebug.c b/fs/ocfs2/dlm/dlmdebug.c
index 5efdd37dfe484f2f6207ac2c7c6927fda0cc1ea0..f693ab812f3eda886e113618e6653116c598f724 100644 (file)
--- a/fs/ocfs2/dlm/dlmdebug.c
+++ b/fs/ocfs2/dlm/dlmdebug.c
@@ -636,8 +636,14 @@ static void *lockres_seq_start(struct seq_file *m, loff_t *pos)
        spin_lock(&dlm->track_lock);
        if (oldres)
                track_list = &oldres->tracking;
-       else
+       else {
                track_list = &dlm->tracking_list;
+               if (list_empty(track_list)) {
+                       dl = NULL;
+                       spin_unlock(&dlm->track_lock);
+                       goto bail;
+               }
+       }
 
        list_for_each_entry(res, track_list, tracking) {
                if (&res->tracking == &dlm->tracking_list)
@@ -660,6 +666,7 @@ static void *lockres_seq_start(struct seq_file *m, loff_t *pos)
        } else
                dl = NULL;
 
+bail:
        /* passed to seq_show */
        return dl;
 }
@@ -775,7 +782,9 @@ static int debug_state_print(struct dlm_ctxt *dlm, struct debug_buffer *db)
 
        /* Domain: xxxxxxxxxx  Key: 0xdfbac769 */
        out += snprintf(db->buf + out, db->len - out,
-                       "Domain: %s  Key: 0x%08x\n", dlm->name, dlm->key);
+                       "Domain: %s  Key: 0x%08x  Protocol: %d.%d\n",
+                       dlm->name, dlm->key, dlm->dlm_locking_proto.pv_major,
+                       dlm->dlm_locking_proto.pv_minor);
 
        /* Thread Pid: xxx  Node: xxx  State: xxxxx */
        out += snprintf(db->buf + out, db->len - out,