vswitch: Implement bundle action.

This patch creates a new action called "bundle".  Bundles are a way
to implement a simple form of multipath in OpenFlow by grouping
several ports in a single output-like action.

1 files changed, 49 insertions, 0 deletions

diff --git a/lib/bundle.h b/lib/bundle.h
new file mode 100644
index 00000000..a202ade4
--- /dev/null
+++ b/lib/bundle.h
@@ -0,0 +1,49 @@
+/* Copyright (c) 2011 Nicira Networks.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef BUNDLE_H
+#define BUNDLE_H 1
+
+#include <arpa/inet.h>
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+
+#include "openflow/nicira-ext.h"
+#include "openvswitch/types.h"
+
+struct ds;
+struct flow;
+struct ofpbuf;
+
+/* NXAST_BUNDLE helper functions.
+ *
+ * See include/openflow/nicira-ext.h for NXAST_BUNDLE specification. */
+
+uint16_t bundle_execute(const struct nx_action_bundle *, const struct flow *,
+                        bool (*slave_enabled)(uint16_t ofp_port, void *aux),
+                        void *aux);
+int bundle_check(const struct nx_action_bundle *, int max_ports);
+void bundle_parse(struct ofpbuf *, const char *);
+void bundle_format(const struct nx_action_bundle *, struct ds *);
+
+/* Returns the 'i'th slave in 'nab'. */
+static inline uint16_t
+bundle_get_slave(const struct nx_action_bundle *nab, size_t i)
+{
+    return ntohs(((ovs_be16 *)(nab + 1))[i]);
+}
+
+#endif /* bundle.h */