Branch HEAD

[fs/lustre-release.git] / lustre / include / obd.h

diff --git a/lustre/include/obd.h b/lustre/include/obd.h
index 3ff60f0..789ad5c 100644 (file)
--- a/lustre/include/obd.h
+++ b/lustre/include/obd.h
@@ -1485,6 +1485,7 @@ struct md_open_data {
         struct obd_client_handle *mod_och;
         struct ptlrpc_request    *mod_open_req;
         struct ptlrpc_request    *mod_close_req;
+        atomic_t                  mod_refcount;
 };
 
 struct lookup_intent;
@@ -1672,4 +1673,21 @@ static inline struct lustre_capa *oinfo_capa(struct obd_info *oinfo)
         return oinfo->oi_capa;
 }
 
+static inline struct md_open_data *obd_mod_alloc(void)
+{
+        struct md_open_data *mod;
+        OBD_ALLOC_PTR(mod);
+        if (mod == NULL)
+                return NULL;
+        atomic_set(&mod->mod_refcount, 1);
+        return mod;
+}
+
+#define obd_mod_get(mod) atomic_inc(&mod->mod_refcount)
+#define obd_mod_put(mod)                                \
+({                                                      \
+        if (atomic_dec_and_test(&mod->mod_refcount))    \
+                OBD_FREE_PTR(mod);                      \
+})
+
 #endif /* __OBD_H */