Add support for OFPFC_MODIFY Flow Mod command.

[openvswitch] / switch / chain.c

diff --git a/switch/chain.c b/switch/chain.c
index 8419070b3417f470f2df74c064834bf9188afafc..0388951da8ff9ff9dd0f7ec180470b1582562435 100644 (file)
--- a/switch/chain.c
+++ b/switch/chain.c
@@ -114,6 +114,27 @@ chain_insert(struct sw_chain *chain, struct sw_flow *flow)
     return -ENOBUFS;
 }
 
+/* Modifies actions in 'chain' that match 'key'.  Returns the number of 
+ * flows that were modified.
+ *
+ * Expensive in the general case as currently implemented, since it requires
+ * iterating through the entire contents of each table for keys that contain
+ * wildcards.  Relatively cheap for fully specified keys. */
+int
+chain_modify(struct sw_chain *chain, const struct sw_flow_key *key,
+        const struct ofp_action *actions, int n_actions)
+{
+    int count = 0;
+    int i;
+
+    for (i = 0; i < chain->n_tables; i++) {
+        struct sw_table *t = chain->tables[i];
+        count += t->modify(t, key, actions, n_actions);
+    }
+
+    return count;
+}
+
 /* Deletes from 'chain' any and all flows that match 'key'.  Returns the number
  * of flows that were deleted.
  *