--- /dev/null
+/*
+ * 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.
+ */
+
+#include <vnet/dpo/l2_bridge_dpo.h>
+#include <vnet/fib/fib_node.h>
+#include <vnet/ethernet/ethernet.h>
+
+/*
+ * The 'DB' of L2 bridge DPOs.
+ * There is only one per-interface, so this is a per-interface vector
+ */
+static index_t *l2_bridge_dpo_db;
+
+static l2_bridge_dpo_t *
+l2_bridge_dpo_alloc (void)
+{
+ l2_bridge_dpo_t *l2b;
+
+ pool_get(l2_bridge_dpo_pool, l2b);
+
+ return (l2b);
+}
+
+static inline l2_bridge_dpo_t *
+l2_bridge_dpo_get_from_dpo (const dpo_id_t *dpo)
+{
+ ASSERT(DPO_L2_BRIDGE == dpo->dpoi_type);
+
+ return (l2_bridge_dpo_get(dpo->dpoi_index));
+}
+
+static inline index_t
+l2_bridge_dpo_get_index (l2_bridge_dpo_t *l2b)
+{
+ return (l2b - l2_bridge_dpo_pool);
+}
+
+static void
+l2_bridge_dpo_lock (dpo_id_t *dpo)
+{
+ l2_bridge_dpo_t *l2b;
+
+ l2b = l2_bridge_dpo_get_from_dpo(dpo);
+ l2b->l2b_locks++;
+}
+
+static void
+l2_bridge_dpo_unlock (dpo_id_t *dpo)
+{
+ l2_bridge_dpo_t *l2b;
+
+ l2b = l2_bridge_dpo_get_from_dpo(dpo);
+ l2b->l2b_locks--;
+
+ if (0 == l2b->l2b_locks)
+ {
+ l2_bridge_dpo_db[l2b->l2b_sw_if_index] = INDEX_INVALID;
+ pool_put(l2_bridge_dpo_pool, l2b);
+ }
+}
+
+/*
+ * l2_bridge_dpo_add_or_lock
+ *
+ * Add/create and lock a new or lock an existing for the L2 Bridge
+ * on the interface given
+ */
+void
+l2_bridge_dpo_add_or_lock (u32 sw_if_index,
+ dpo_id_t *dpo)
+{
+ l2_bridge_dpo_t *l2b;
+
+ vec_validate_init_empty(l2_bridge_dpo_db,
+ sw_if_index,
+ INDEX_INVALID);
+
+ if (INDEX_INVALID == l2_bridge_dpo_db[sw_if_index])
+ {
+ l2b = l2_bridge_dpo_alloc();
+
+ l2b->l2b_sw_if_index = sw_if_index;
+
+ l2_bridge_dpo_db[sw_if_index] =
+ l2_bridge_dpo_get_index(l2b);
+ }
+ else
+ {
+ l2b = l2_bridge_dpo_get(l2_bridge_dpo_db[sw_if_index]);
+ }
+
+ dpo_set(dpo, DPO_L2_BRIDGE, DPO_PROTO_ETHERNET, l2_bridge_dpo_get_index(l2b));
+}
+
+
+static clib_error_t *
+l2_bridge_dpo_interface_state_change (vnet_main_t * vnm,
+ u32 sw_if_index,
+ u32 flags)
+{
+ /*
+ */
+ return (NULL);
+}
+
+VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION(
+ l2_bridge_dpo_interface_state_change);
+
+/**
+ * @brief Registered callback for HW interface state changes
+ */
+static clib_error_t *
+l2_bridge_dpo_hw_interface_state_change (vnet_main_t * vnm,
+ u32 hw_if_index,
+ u32 flags)
+{
+ return (NULL);
+}
+
+VNET_HW_INTERFACE_LINK_UP_DOWN_FUNCTION(
+ l2_bridge_dpo_hw_interface_state_change);
+
+static clib_error_t *
+l2_bridge_dpo_interface_delete (vnet_main_t * vnm,
+ u32 sw_if_index,
+ u32 is_add)
+{
+ return (NULL);
+}
+
+VNET_SW_INTERFACE_ADD_DEL_FUNCTION(
+ l2_bridge_dpo_interface_delete);
+
+u8*
+format_l2_bridge_dpo (u8* s, va_list *ap)
+{
+ index_t index = va_arg(*ap, index_t);
+ CLIB_UNUSED(u32 indent) = va_arg(*ap, u32);
+ vnet_main_t * vnm = vnet_get_main();
+ l2_bridge_dpo_t *l2b = l2_bridge_dpo_get(index);
+
+ return (format(s, "l2-bridge-%U-dpo",
+ format_vnet_sw_interface_name,
+ vnm,
+ vnet_get_sw_interface(vnm, l2b->l2b_sw_if_index)));
+}
+
+static void
+l2_bridge_dpo_mem_show (void)
+{
+ fib_show_memory_usage("L2-bridge",
+ pool_elts(l2_bridge_dpo_pool),
+ pool_len(l2_bridge_dpo_pool),
+ sizeof(l2_bridge_dpo_t));
+}
+
+
+const static dpo_vft_t l2_bridge_dpo_vft = {
+ .dv_lock = l2_bridge_dpo_lock,
+ .dv_unlock = l2_bridge_dpo_unlock,
+ .dv_format = format_l2_bridge_dpo,
+ .dv_mem_show = l2_bridge_dpo_mem_show,
+};
+
+/**
+ * @brief The per-protocol VLIB graph nodes that are assigned to a glean
+ * object.
+ *
+ * this means that these graph nodes are ones from which a glean is the
+ * parent object in the DPO-graph.
+ */
+const static char* const l2_bridge_dpo_l2_nodes[] =
+{
+ "l2-bridge-dpo",
+ NULL,
+};
+
+const static char* const * const l2_bridge_dpo_nodes[DPO_PROTO_NUM] =
+{
+ [DPO_PROTO_ETHERNET] = l2_bridge_dpo_l2_nodes,
+};
+
+void
+l2_bridge_dpo_module_init (void)
+{
+ dpo_register(DPO_L2_BRIDGE,
+ &l2_bridge_dpo_vft,
+ l2_bridge_dpo_nodes);
+}
+
+/**
+ * @brief Interface DPO trace data
+ */
+typedef struct l2_bridge_dpo_trace_t_
+{
+ u32 sw_if_index;
+} l2_bridge_dpo_trace_t;
+
+typedef enum l2_bridge_dpo_next_t_
+{
+ L2_BRIDGE_DPO_DROP = 0,
+ L2_BRIDGE_DPO_OUTPUT = 1,
+} l2_bridge_dpo_next_t;
+
+always_inline uword
+l2_bridge_dpo_inline (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame)
+{
+ u32 n_left_from, next_index, * from, * to_next;
+
+ from = vlib_frame_vector_args (from_frame);
+ n_left_from = from_frame->n_vectors;
+
+ next_index = node->cached_next_index;
+
+ while (n_left_from > 0)
+ {
+ u32 n_left_to_next;
+
+ vlib_get_next_frame(vm, node, next_index, to_next, n_left_to_next);
+
+ while (n_left_from >= 4 && n_left_to_next > 2)
+ {
+ const l2_bridge_dpo_t *l2b0, *l2b1;
+ u32 bi0, l2bi0, bi1, l2bi1;
+ vlib_buffer_t *b0, *b1;
+ u8 len0, len1;
+
+ bi0 = from[0];
+ to_next[0] = bi0;
+ bi1 = from[1];
+ to_next[1] = bi1;
+ from += 2;
+ to_next += 2;
+ n_left_from -= 2;
+ n_left_to_next -= 2;
+
+ b0 = vlib_get_buffer (vm, bi0);
+ b1 = vlib_get_buffer (vm, bi1);
+
+ l2bi0 = vnet_buffer(b0)->ip.adj_index[VLIB_TX];
+ l2bi1 = vnet_buffer(b1)->ip.adj_index[VLIB_TX];
+ l2b0 = l2_bridge_dpo_get(l2bi0);
+ l2b1 = l2_bridge_dpo_get(l2bi1);
+
+ vnet_buffer(b0)->sw_if_index[VLIB_TX] = l2b0->l2b_sw_if_index;
+ vnet_buffer(b1)->sw_if_index[VLIB_TX] = l2b1->l2b_sw_if_index;
+
+ len0 = ((u8*)vlib_buffer_get_current(b0) -
+ (u8*)ethernet_buffer_get_header(b0));
+ len1 = ((u8*)vlib_buffer_get_current(b1) -
+ (u8*)ethernet_buffer_get_header(b1));
+ vnet_buffer(b0)->l2.l2_len = len0;
+ vnet_buffer(b1)->l2.l2_len = len1;
+
+ vlib_buffer_advance(b0, -len0);
+ vlib_buffer_advance(b1, -len1);
+
+ if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ l2_bridge_dpo_trace_t *tr0;
+
+ tr0 = vlib_add_trace (vm, node, b0, sizeof (*tr0));
+ tr0->sw_if_index = l2b0->l2b_sw_if_index;
+ }
+ if (PREDICT_FALSE(b1->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ l2_bridge_dpo_trace_t *tr1;
+
+ tr1 = vlib_add_trace (vm, node, b1, sizeof (*tr1));
+ tr1->sw_if_index = l2b1->l2b_sw_if_index;
+ }
+
+ vlib_validate_buffer_enqueue_x2(vm, node, next_index, to_next,
+ n_left_to_next, bi0, bi1,
+ L2_BRIDGE_DPO_OUTPUT,
+ L2_BRIDGE_DPO_OUTPUT);
+ }
+
+ while (n_left_from > 0 && n_left_to_next > 0)
+ {
+ const l2_bridge_dpo_t * l2b0;
+ vlib_buffer_t * b0;
+ u32 bi0, l2bi0;
+ u8 len0;
+
+ bi0 = from[0];
+ to_next[0] = bi0;
+ from += 1;
+ to_next += 1;
+ n_left_from -= 1;
+ n_left_to_next -= 1;
+
+ b0 = vlib_get_buffer (vm, bi0);
+
+ l2bi0 = vnet_buffer(b0)->ip.adj_index[VLIB_TX];
+ l2b0 = l2_bridge_dpo_get(l2bi0);
+
+ vnet_buffer(b0)->sw_if_index[VLIB_TX] = l2b0->l2b_sw_if_index;
+
+ /*
+ * take that, and rewind it back...
+ */
+ len0 = ((u8*)vlib_buffer_get_current(b0) -
+ (u8*)ethernet_buffer_get_header(b0));
+ vnet_buffer(b0)->l2.l2_len = len0;
+ vlib_buffer_advance(b0, -len0);
+
+ if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ l2_bridge_dpo_trace_t *tr;
+
+ tr = vlib_add_trace (vm, node, b0, sizeof (*tr));
+ tr->sw_if_index = l2b0->l2b_sw_if_index;
+ }
+
+ vlib_validate_buffer_enqueue_x1(vm, node, next_index, to_next,
+ n_left_to_next, bi0,
+ L2_BRIDGE_DPO_OUTPUT);
+ }
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ }
+ return from_frame->n_vectors;
+}
+
+static u8 *
+format_l2_bridge_dpo_trace (u8 * s, va_list * args)
+{
+ CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
+ CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
+ l2_bridge_dpo_trace_t * t = va_arg (*args, l2_bridge_dpo_trace_t *);
+ uword indent = format_get_indent (s);
+ s = format (s, "%U sw_if_index:%d",
+ format_white_space, indent,
+ t->sw_if_index);
+ return s;
+}
+
+static uword
+l2_bridge_dpo_l2 (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame)
+{
+ return (l2_bridge_dpo_inline(vm, node, from_frame));
+}
+
+
+VLIB_REGISTER_NODE (l2_bridge_dpo_l2_node) = {
+ .function = l2_bridge_dpo_l2,
+ .name = "l2-bridge-dpo",
+ .vector_size = sizeof (u32),
+ .format_trace = format_l2_bridge_dpo_trace,
+
+ .n_next_nodes = 2,
+ .next_nodes = {
+ [L2_BRIDGE_DPO_DROP] = "error-drop",
+ [L2_BRIDGE_DPO_OUTPUT] = "l2-output",
+ },
+};
+
+VLIB_NODE_FUNCTION_MULTIARCH (l2_bridge_dpo_l2_node,
+ l2_bridge_dpo_l2)
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