ocfs2/dlm: Trace insert/remove of resource to/from hash

Add mlog to trace adding and removing the resource from/to the hash table.

Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>

3 files changed, 15 insertions, 11 deletions

diff --git a/fs/ocfs2/dlm/dlmcommon.h b/fs/ocfs2/dlm/dlmcommon.h
index 4a5d5804b130..b1748ac74751 100644
--- a/fs/ocfs2/dlm/dlmcommon.h
+++ b/fs/ocfs2/dlm/dlmcommon.h
@@ -877,9 +877,8 @@ static inline void dlm_lockres_get(struct dlm_lock_resource *res)
         kref_get(&res->refs);
 }
 void dlm_lockres_put(struct dlm_lock_resource *res);
-void __dlm_unhash_lockres(struct dlm_lock_resource *res);
-void __dlm_insert_lockres(struct dlm_ctxt *dlm,
-                          struct dlm_lock_resource *res);
+void __dlm_unhash_lockres(struct dlm_ctxt *dlm, struct dlm_lock_resource *res);
+void __dlm_insert_lockres(struct dlm_ctxt *dlm, struct dlm_lock_resource *res);
 struct dlm_lock_resource * __dlm_lookup_lockres_full(struct dlm_ctxt *dlm,
                                                      const char *name,
                                                      unsigned int len,
diff --git a/fs/ocfs2/dlm/dlmdomain.c b/fs/ocfs2/dlm/dlmdomain.c
index ce225fb0cea7..200d9888ffee 100644
--- a/fs/ocfs2/dlm/dlmdomain.c
+++ b/fs/ocfs2/dlm/dlmdomain.c
@@ -157,16 +157,18 @@ static int dlm_protocol_compare(struct dlm_protocol_version *existing,
 
 static void dlm_unregister_domain_handlers(struct dlm_ctxt *dlm);
 
-void __dlm_unhash_lockres(struct dlm_lock_resource *lockres)
+void __dlm_unhash_lockres(struct dlm_ctxt *dlm, struct dlm_lock_resource *res)
 {
-        if (!hlist_unhashed(&lockres->hash_node)) {
-                hlist_del_init(&lockres->hash_node);
-                dlm_lockres_put(lockres);
-        }
+        if (hlist_unhashed(&res->hash_node))
+                return;
+
+        mlog(0, "%s: Unhash res %.*s\n", dlm->name, res->lockname.len,
+             res->lockname.name);
+        hlist_del_init(&res->hash_node);
+        dlm_lockres_put(res);
 }
 
-void __dlm_insert_lockres(struct dlm_ctxt *dlm,
-                       struct dlm_lock_resource *res)
+void __dlm_insert_lockres(struct dlm_ctxt *dlm, struct dlm_lock_resource *res)
 {
         struct hlist_head *bucket;
         struct qstr *q;
@@ -180,6 +182,9 @@ void __dlm_insert_lockres(struct dlm_ctxt *dlm,
         dlm_lockres_get(res);
 
         hlist_add_head(&res->hash_node, bucket);
+
+        mlog(0, "%s: Hash res %.*s\n", dlm->name, res->lockname.len,
+             res->lockname.name);
 }
 
 struct dlm_lock_resource * __dlm_lookup_lockres_full(struct dlm_ctxt *dlm,
diff --git a/fs/ocfs2/dlm/dlmthread.c b/fs/ocfs2/dlm/dlmthread.c
index 46faac20f16c..4eff65e7e59e 100644
--- a/fs/ocfs2/dlm/dlmthread.c
+++ b/fs/ocfs2/dlm/dlmthread.c
@@ -207,7 +207,7 @@ static void dlm_purge_lockres(struct dlm_ctxt *dlm,
                 BUG();
         }
 
-        __dlm_unhash_lockres(res);
+        __dlm_unhash_lockres(dlm, res);
 
         /* lockres is not in the hash now.  drop the flag and wake up
          * any processes waiting in dlm_get_lock_resource. */