+
+struct mdc_open_data {
+ struct obd_client_handle *mod_och;
+ struct ptlrpc_request *mod_open_req;
+ struct ptlrpc_request *mod_close_req;
+};
+
+struct mdc_rpc_lock {
+ struct semaphore rpcl_sem;
+ struct lookup_intent *rpcl_it;
+};
+
+static inline void mdc_init_rpc_lock(struct mdc_rpc_lock *lck)
+{
+ sema_init(&lck->rpcl_sem, 1);
+ lck->rpcl_it = NULL;
+}
+
+static inline void mdc_get_rpc_lock(struct mdc_rpc_lock *lck,
+ struct lookup_intent *it)
+{
+ ENTRY;
+ down(&lck->rpcl_sem);
+ if (it) {
+ lck->rpcl_it = it;
+ }
+}
+
+static inline void mdc_put_rpc_lock(struct mdc_rpc_lock *lck,
+ struct lookup_intent *it)
+{
+ EXIT;
+ if (it == NULL) {
+ LASSERT(it == lck->rpcl_it);
+ up(&lck->rpcl_sem);
+ return;
+ }
+ if (it) {
+ LASSERT(it == lck->rpcl_it);
+ lck->rpcl_it = NULL;
+ up(&lck->rpcl_sem);
+ }
+}