2 * l2_uu_fwd.c : Foward unknown unicast packets to BD's configured interface
4 * Copyright (c) 2018 Cisco and/or its affiliates.
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at:
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
18 #include <vnet/l2/l2_bd.h>
19 #include <vnet/l2/l2_input.h>
21 #define foreach_l2_uu_fwd_error \
22 _(L2_UU_FWD, "L2 UU fwd")
26 #define _(sym,str) L2_UU_FWD_ERROR_##sym,
27 foreach_l2_uu_fwd_error
32 static char *l2_uu_fwd_error_strings[] = {
33 #define _(sym,string) string,
34 foreach_l2_uu_fwd_error
41 L2_UU_FWD_NEXT_L2_OUTPUT,
50 /* packet trace format function */
52 format_l2_uu_fwd_trace (u8 * s, va_list * args)
54 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
55 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
56 l2_uu_fwd_trace_t *t = va_arg (*args, l2_uu_fwd_trace_t *);
58 s = format (s, "l2-uu-fwd: sw_if_index %d", t->sw_if_index);
63 l2_uu_fwd_node_fn (vlib_main_t * vm,
64 vlib_node_runtime_t * node, vlib_frame_t * frame)
66 u32 n_left_from, *from, *to_next;
67 l2_uu_fwd_next_t next_index;
69 from = vlib_frame_vector_args (frame);
70 n_left_from = frame->n_vectors;
71 next_index = node->cached_next_index;
73 while (n_left_from > 0)
77 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
79 while (n_left_from >= 8 && n_left_to_next >= 4)
81 const l2_bridge_domain_t *bdc0, *bdc1, *bdc2, *bdc3;
82 l2_uu_fwd_next_t next0, next1, next2, next3;
83 vlib_buffer_t *b0, *b1, *b2, *b3;
84 u32 bi0, bi1, bi2, bi3;
87 vlib_buffer_t *b4, *b5, *b6, *b7;
89 b4 = vlib_get_buffer (vm, from[4]);
90 b5 = vlib_get_buffer (vm, from[5]);
91 b6 = vlib_get_buffer (vm, from[6]);
92 b7 = vlib_get_buffer (vm, from[7]);
94 vlib_prefetch_buffer_header (b4, STORE);
95 vlib_prefetch_buffer_header (b5, STORE);
96 vlib_prefetch_buffer_header (b6, STORE);
97 vlib_prefetch_buffer_header (b7, STORE);
99 bi0 = to_next[0] = from[0];
100 bi1 = to_next[1] = from[1];
101 bi2 = to_next[2] = from[2];
102 bi3 = to_next[3] = from[3];
109 next3 = next2 = next1 = next0 = L2_UU_FWD_NEXT_L2_OUTPUT;
111 b0 = vlib_get_buffer (vm, bi0);
112 b1 = vlib_get_buffer (vm, bi1);
113 b2 = vlib_get_buffer (vm, bi2);
114 b3 = vlib_get_buffer (vm, bi3);
116 bdc0 = vec_elt_at_index (l2input_main.bd_configs,
117 vnet_buffer (b0)->l2.bd_index);
118 bdc1 = vec_elt_at_index (l2input_main.bd_configs,
119 vnet_buffer (b1)->l2.bd_index);
120 bdc2 = vec_elt_at_index (l2input_main.bd_configs,
121 vnet_buffer (b2)->l2.bd_index);
122 bdc3 = vec_elt_at_index (l2input_main.bd_configs,
123 vnet_buffer (b3)->l2.bd_index);
125 ASSERT (~0 != bdc0->uu_fwd_sw_if_index);
127 vnet_buffer (b0)->sw_if_index[VLIB_TX] = bdc0->uu_fwd_sw_if_index;
128 vnet_buffer (b1)->sw_if_index[VLIB_TX] = bdc1->uu_fwd_sw_if_index;
129 vnet_buffer (b2)->sw_if_index[VLIB_TX] = bdc2->uu_fwd_sw_if_index;
130 vnet_buffer (b3)->sw_if_index[VLIB_TX] = bdc3->uu_fwd_sw_if_index;
132 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
133 (b0->flags & VLIB_BUFFER_IS_TRACED)))
135 l2_uu_fwd_trace_t *t;
137 t = vlib_add_trace (vm, node, b0, sizeof (*t));
138 t->sw_if_index = bdc0->uu_fwd_sw_if_index;
140 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
141 (b1->flags & VLIB_BUFFER_IS_TRACED)))
143 l2_uu_fwd_trace_t *t;
145 t = vlib_add_trace (vm, node, b1, sizeof (*t));
146 t->sw_if_index = bdc1->uu_fwd_sw_if_index;
148 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
149 (b1->flags & VLIB_BUFFER_IS_TRACED)))
151 l2_uu_fwd_trace_t *t;
153 t = vlib_add_trace (vm, node, b2, sizeof (*t));
154 t->sw_if_index = bdc2->uu_fwd_sw_if_index;
156 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
157 (b1->flags & VLIB_BUFFER_IS_TRACED)))
159 l2_uu_fwd_trace_t *t;
161 t = vlib_add_trace (vm, node, b3, sizeof (*t));
162 t->sw_if_index = bdc3->uu_fwd_sw_if_index;
164 vlib_validate_buffer_enqueue_x4 (vm, node, next_index,
165 to_next, n_left_to_next,
167 next0, next1, next2, next3);
170 while (n_left_from > 0 && n_left_to_next > 0)
172 const l2_bridge_domain_t *bdc0;
173 l2_uu_fwd_next_t next0;
183 next0 = L2_UU_FWD_NEXT_L2_OUTPUT;
184 b0 = vlib_get_buffer (vm, bi0);
186 bdc0 = vec_elt_at_index (l2input_main.bd_configs,
187 vnet_buffer (b0)->l2.bd_index);
188 ASSERT (~0 != bdc0->uu_fwd_sw_if_index);
190 vnet_buffer (b0)->sw_if_index[VLIB_TX] = bdc0->uu_fwd_sw_if_index;
192 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
193 (b0->flags & VLIB_BUFFER_IS_TRACED)))
195 l2_uu_fwd_trace_t *t;
197 t = vlib_add_trace (vm, node, b0, sizeof (*t));
198 t->sw_if_index = bdc0->uu_fwd_sw_if_index;
200 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
201 to_next, n_left_to_next,
205 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
208 vlib_node_increment_counter (vm, node->node_index,
209 L2_UU_FWD_ERROR_L2_UU_FWD, frame->n_vectors);
211 return frame->n_vectors;
215 VLIB_REGISTER_NODE (l2_uu_fwd_node,static) = {
216 .function = l2_uu_fwd_node_fn,
218 .vector_size = sizeof (u32),
219 .format_trace = format_l2_uu_fwd_trace,
220 .type = VLIB_NODE_TYPE_INTERNAL,
222 .n_errors = ARRAY_LEN(l2_uu_fwd_error_strings),
223 .error_strings = l2_uu_fwd_error_strings,
225 .n_next_nodes = L2_UU_FWD_N_NEXT,
228 [L2_UU_FWD_NEXT_DROP] = "error-drop",
229 [L2_UU_FWD_NEXT_L2_OUTPUT] = "l2-output",
233 VLIB_NODE_FUNCTION_MULTIARCH (l2_uu_fwd_node, l2_uu_fwd_node_fn)
237 * fd.io coding-style-patch-verification: ON
240 * eval: (c-set-style "gnu")