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authorNeale Ranns <nranns@cisco.com>2017-10-03 08:20:21 -0700
committerDamjan Marion <dmarion.lists@gmail.com>2017-10-05 09:50:26 +0000
commit6f6311560380d0e992f710558e213df1b098ef94 (patch)
tree237e34a2165ed5d2fc0848a1daec457ce57acc3e /src/vnet/dpo/l2_bridge_dpo.h
parentd3c008d108aa2187d1a2afe2833b4de25ca2c2ab (diff)
Distributed Virtual Router Support
A distributed virtual router works by attmpeting to switch a packet, but on failing to find a local consumer (i.e. the packet is destined to a locally attached host) then the packet is sent unmodified 'upstream' to where the rest of the 'distributed' router is present. When L3 switching a packet this means the L2 header must not be modifed. This patch adds a 'l2-bridge' object to the L3 FIB which re-injects packets from the L3 path back into the L2 path - use with extreme caution. Change-Id: I069724eb45956647d7980cbe40a80a788ee6ee82 Signed-off-by: Neale Ranns <nranns@cisco.com>
Diffstat (limited to 'src/vnet/dpo/l2_bridge_dpo.h')
-rw-r--r--src/vnet/dpo/l2_bridge_dpo.h56
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diff --git a/src/vnet/dpo/l2_bridge_dpo.h b/src/vnet/dpo/l2_bridge_dpo.h
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+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ * 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 __L2_BRIDGE_DPO_H__
+#define __L2_BRIDGE_DPO_H__
+
+#include <vnet/dpo/dpo.h>
+
+/**
+ * @brief
+ * The data-path object representing an L2 bridge.
+ * If a packet encounters an object of this type in the L3 data-path, it
+ * is injected back into the L2 bridge.
+ */
+typedef struct l2_bridge_dpo_t_
+{
+ /**
+ * The Software interface index that the packets will output on
+ */
+ u32 l2b_sw_if_index;
+
+ /**
+ * number of locks.
+ */
+ u16 l2b_locks;
+} l2_bridge_dpo_t;
+
+extern void l2_bridge_dpo_add_or_lock (u32 sw_if_index,
+ dpo_id_t *dpo);
+
+extern void l2_bridge_dpo_module_init(void);
+
+/**
+ * @brief pool of all interface DPOs
+ */
+l2_bridge_dpo_t *l2_bridge_dpo_pool;
+
+static inline l2_bridge_dpo_t *
+l2_bridge_dpo_get (index_t index)
+{
+ return (pool_elt_at_index(l2_bridge_dpo_pool, index));
+}
+
+#endif