2 * Copyright (c) 2016 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
16 #include <vnet/ip/ip4_input.h>
17 #include <vnet/ip/ip6_input.h>
18 #include <vnet/dpo/mpls_disposition.h>
19 #include <vnet/mpls/mpls.h>
21 #ifndef CLIB_MARCH_VARIANT
23 * pool of all MPLS Label DPOs
25 mpls_disp_dpo_t *mpls_disp_dpo_pool;
27 static mpls_disp_dpo_t *
28 mpls_disp_dpo_alloc (void)
32 pool_get_aligned(mpls_disp_dpo_pool, mdd, CLIB_CACHE_LINE_BYTES);
33 clib_memset(mdd, 0, sizeof(*mdd));
35 dpo_reset(&mdd->mdd_dpo);
41 mpls_disp_dpo_get_index (mpls_disp_dpo_t *mdd)
43 return (mdd - mpls_disp_dpo_pool);
47 mpls_disp_dpo_create (dpo_proto_t payload_proto,
49 fib_mpls_lsp_mode_t mode,
50 const dpo_id_t *parent,
56 mdd = mpls_disp_dpo_alloc();
58 mdd->mdd_payload_proto = payload_proto;
59 mdd->mdd_rpf_id = rpf_id;
61 dtype = (FIB_MPLS_LSP_MODE_PIPE == mode ?
62 DPO_MPLS_DISPOSITION_PIPE :
63 DPO_MPLS_DISPOSITION_UNIFORM);
66 * stack this disposition object on the parent given
69 mdd->mdd_payload_proto,
74 * set up the return DPO to refer to this object
79 mpls_disp_dpo_get_index(mdd));
83 format_mpls_disp_dpo (u8 *s, va_list *args)
85 index_t index = va_arg(*args, index_t);
86 u32 indent = va_arg(*args, u32);
89 mdd = mpls_disp_dpo_get(index);
91 s = format(s, "mpls-disposition:[%d]:[%U, %U]",
93 format_dpo_proto, mdd->mdd_payload_proto,
94 format_fib_mpls_lsp_mode, mdd->mdd_mode);
96 s = format(s, "\n%U", format_white_space, indent);
97 s = format(s, "%U", format_dpo_id, &mdd->mdd_dpo, indent+2);
103 mpls_disp_dpo_lock (dpo_id_t *dpo)
105 mpls_disp_dpo_t *mdd;
107 mdd = mpls_disp_dpo_get(dpo->dpoi_index);
113 mpls_disp_dpo_unlock (dpo_id_t *dpo)
115 mpls_disp_dpo_t *mdd;
117 mdd = mpls_disp_dpo_get(dpo->dpoi_index);
121 if (0 == mdd->mdd_locks)
123 dpo_reset(&mdd->mdd_dpo);
124 pool_put(mpls_disp_dpo_pool, mdd);
127 #endif /* CLIB_MARCH_VARIANT */
130 * @brief A struct to hold tracing information for the MPLS label disposition
133 typedef struct mpls_label_disposition_trace_t_
136 } mpls_label_disposition_trace_t;
138 extern vlib_node_registration_t ip4_mpls_label_disposition_pipe_node;
139 extern vlib_node_registration_t ip6_mpls_label_disposition_pipe_node;
140 extern vlib_node_registration_t ip4_mpls_label_disposition_uniform_node;
141 extern vlib_node_registration_t ip6_mpls_label_disposition_uniform_node;
144 mpls_label_disposition_inline (vlib_main_t * vm,
145 vlib_node_runtime_t * node,
146 vlib_frame_t * from_frame,
149 fib_mpls_lsp_mode_t mode)
151 u32 n_left_from, next_index, * from, * to_next;
152 vlib_node_runtime_t *error_node;
156 if (FIB_MPLS_LSP_MODE_PIPE == mode)
158 vlib_node_get_runtime(vm, ip4_mpls_label_disposition_pipe_node.index);
161 vlib_node_get_runtime(vm, ip4_mpls_label_disposition_uniform_node.index);
165 if (FIB_MPLS_LSP_MODE_PIPE == mode)
167 vlib_node_get_runtime(vm, ip6_mpls_label_disposition_pipe_node.index);
170 vlib_node_get_runtime(vm, ip6_mpls_label_disposition_uniform_node.index);
172 from = vlib_frame_vector_args(from_frame);
173 n_left_from = from_frame->n_vectors;
175 next_index = node->cached_next_index;
177 while (n_left_from > 0)
181 vlib_get_next_frame(vm, node, next_index, to_next, n_left_to_next);
183 while (n_left_from >= 4 && n_left_to_next >= 2)
185 mpls_disp_dpo_t *mdd0, *mdd1;
186 u32 bi0, mddi0, bi1, mddi1;
187 vlib_buffer_t * b0, *b1;
190 bi0 = to_next[0] = from[0];
191 bi1 = to_next[1] = from[1];
193 /* Prefetch next iteration. */
195 vlib_buffer_t * p2, * p3;
197 p2 = vlib_get_buffer(vm, from[2]);
198 p3 = vlib_get_buffer(vm, from[3]);
200 vlib_prefetch_buffer_header(p2, STORE);
201 vlib_prefetch_buffer_header(p3, STORE);
203 CLIB_PREFETCH(p2->data, sizeof(ip6_header_t), STORE);
204 CLIB_PREFETCH(p3->data, sizeof(ip6_header_t), STORE);
212 b0 = vlib_get_buffer(vm, bi0);
213 b1 = vlib_get_buffer(vm, bi1);
215 /* dst lookup was done by ip4 lookup */
216 mddi0 = vnet_buffer(b0)->ip.adj_index[VLIB_TX];
217 mddi1 = vnet_buffer(b1)->ip.adj_index[VLIB_TX];
218 mdd0 = mpls_disp_dpo_get(mddi0);
219 mdd1 = mpls_disp_dpo_get(mddi1);
221 next0 = mdd0->mdd_dpo.dpoi_next_node;
222 next1 = mdd1->mdd_dpo.dpoi_next_node;
226 ip4_header_t *ip0, *ip1;
228 ip0 = vlib_buffer_get_current(b0);
229 ip1 = vlib_buffer_get_current(b1);
232 * IPv4 input checks on the exposed IP header
235 ip4_input_check_x2(vm, error_node,
239 if (FIB_MPLS_LSP_MODE_UNIFORM == mode)
242 * Copy the TTL from the MPLS packet into the
243 * exposed IP. recalc the chksum
245 ip0->ttl = vnet_buffer(b0)->mpls.ttl;
246 ip1->ttl = vnet_buffer(b1)->mpls.ttl;
247 ip0->tos = mpls_exp_to_ip_dscp(vnet_buffer(b0)->mpls.exp);
248 ip1->tos = mpls_exp_to_ip_dscp(vnet_buffer(b1)->mpls.exp);
250 ip0->checksum = ip4_header_checksum(ip0);
251 ip1->checksum = ip4_header_checksum(ip1);
254 else if (payload_is_ip6)
256 ip6_header_t *ip0, *ip1;
258 ip0 = vlib_buffer_get_current(b0);
259 ip1 = vlib_buffer_get_current(b1);
262 * IPv6 input checks on the exposed IP header
264 ip6_input_check_x2(vm, error_node,
268 if (FIB_MPLS_LSP_MODE_UNIFORM == mode)
271 * Copy the TTL from the MPLS packet into the
274 ip0->hop_limit = vnet_buffer(b0)->mpls.ttl;
275 ip1->hop_limit = vnet_buffer(b1)->mpls.ttl;
277 ip6_set_traffic_class_network_order(
279 mpls_exp_to_ip_dscp(vnet_buffer(b0)->mpls.exp));
280 ip6_set_traffic_class_network_order(
282 mpls_exp_to_ip_dscp(vnet_buffer(b1)->mpls.exp));
286 vnet_buffer(b0)->ip.adj_index[VLIB_TX] = mdd0->mdd_dpo.dpoi_index;
287 vnet_buffer(b1)->ip.adj_index[VLIB_TX] = mdd1->mdd_dpo.dpoi_index;
288 vnet_buffer(b0)->ip.rpf_id = mdd0->mdd_rpf_id;
289 vnet_buffer(b1)->ip.rpf_id = mdd1->mdd_rpf_id;
291 if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
293 mpls_label_disposition_trace_t *tr =
294 vlib_add_trace(vm, node, b0, sizeof(*tr));
298 if (PREDICT_FALSE(b1->flags & VLIB_BUFFER_IS_TRACED))
300 mpls_label_disposition_trace_t *tr =
301 vlib_add_trace(vm, node, b1, sizeof(*tr));
305 vlib_validate_buffer_enqueue_x2(vm, node, next_index, to_next,
307 bi0, bi1, next0, next1);
310 while (n_left_from > 0 && n_left_to_next > 0)
312 mpls_disp_dpo_t *mdd0;
324 b0 = vlib_get_buffer(vm, bi0);
326 /* dst lookup was done by ip4 lookup */
327 mddi0 = vnet_buffer(b0)->ip.adj_index[VLIB_TX];
328 mdd0 = mpls_disp_dpo_get(mddi0);
329 next0 = mdd0->mdd_dpo.dpoi_next_node;
335 ip0 = vlib_buffer_get_current(b0);
338 * IPv4 input checks on the exposed IP header
341 ip4_input_check_x1(vm, error_node, b0, ip0, &next0, 1);
343 if (FIB_MPLS_LSP_MODE_UNIFORM == mode)
346 * Copy the TTL from the MPLS packet into the
347 * exposed IP. recalc the chksum
349 ip0->ttl = vnet_buffer(b0)->mpls.ttl;
350 ip0->tos = mpls_exp_to_ip_dscp(vnet_buffer(b0)->mpls.exp);
351 ip0->checksum = ip4_header_checksum(ip0);
354 else if (payload_is_ip6)
358 ip0 = vlib_buffer_get_current(b0);
361 * IPv6 input checks on the exposed IP header
363 ip6_input_check_x1(vm, error_node, b0, ip0, &next0);
365 if (FIB_MPLS_LSP_MODE_UNIFORM == mode)
368 * Copy the TTL from the MPLS packet into the
371 ip0->hop_limit = vnet_buffer(b0)->mpls.ttl;
373 ip6_set_traffic_class_network_order(
375 mpls_exp_to_ip_dscp(vnet_buffer(b0)->mpls.exp));
379 vnet_buffer(b0)->ip.adj_index[VLIB_TX] = mdd0->mdd_dpo.dpoi_index;
380 vnet_buffer(b0)->ip.rpf_id = mdd0->mdd_rpf_id;
382 if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
384 mpls_label_disposition_trace_t *tr =
385 vlib_add_trace(vm, node, b0, sizeof(*tr));
389 vlib_validate_buffer_enqueue_x1(vm, node, next_index, to_next,
390 n_left_to_next, bi0, next0);
392 vlib_put_next_frame(vm, node, next_index, n_left_to_next);
394 return from_frame->n_vectors;
398 format_mpls_label_disposition_trace (u8 * s, va_list * args)
400 CLIB_UNUSED(vlib_main_t * vm) = va_arg(*args, vlib_main_t *);
401 CLIB_UNUSED(vlib_node_t * node) = va_arg(*args, vlib_node_t *);
402 CLIB_UNUSED(mpls_label_disposition_trace_t * t);
404 t = va_arg(*args, mpls_label_disposition_trace_t *);
406 s = format(s, "disp:%d", t->mdd);
410 VLIB_NODE_FN (ip4_mpls_label_disposition_pipe_node) (vlib_main_t * vm,
411 vlib_node_runtime_t * node,
412 vlib_frame_t * frame)
414 return (mpls_label_disposition_inline(vm, node, frame, 1, 0,
415 FIB_MPLS_LSP_MODE_PIPE));
418 VLIB_REGISTER_NODE(ip4_mpls_label_disposition_pipe_node) = {
419 .name = "ip4-mpls-label-disposition-pipe",
420 .vector_size = sizeof(u32),
422 .format_trace = format_mpls_label_disposition_trace,
423 .sibling_of = "ip4-input",
424 .n_errors = IP4_N_ERROR,
425 .error_strings = ip4_error_strings,
428 VLIB_NODE_FN (ip6_mpls_label_disposition_pipe_node) (vlib_main_t * vm,
429 vlib_node_runtime_t * node,
430 vlib_frame_t * frame)
432 return (mpls_label_disposition_inline(vm, node, frame, 0, 1,
433 FIB_MPLS_LSP_MODE_PIPE));
436 VLIB_REGISTER_NODE(ip6_mpls_label_disposition_pipe_node) = {
437 .name = "ip6-mpls-label-disposition-pipe",
438 .vector_size = sizeof(u32),
440 .format_trace = format_mpls_label_disposition_trace,
441 .sibling_of = "ip6-input",
442 .n_errors = IP6_N_ERROR,
443 .error_strings = ip6_error_strings,
446 VLIB_NODE_FN (ip4_mpls_label_disposition_uniform_node) (vlib_main_t * vm,
447 vlib_node_runtime_t * node,
448 vlib_frame_t * frame)
450 return (mpls_label_disposition_inline(vm, node, frame, 1, 0,
451 FIB_MPLS_LSP_MODE_UNIFORM));
454 VLIB_REGISTER_NODE(ip4_mpls_label_disposition_uniform_node) = {
455 .name = "ip4-mpls-label-disposition-uniform",
456 .vector_size = sizeof(u32),
458 .format_trace = format_mpls_label_disposition_trace,
459 .sibling_of = "ip4-input",
460 .n_errors = IP4_N_ERROR,
461 .error_strings = ip4_error_strings,
464 VLIB_NODE_FN (ip6_mpls_label_disposition_uniform_node) (vlib_main_t * vm,
465 vlib_node_runtime_t * node,
466 vlib_frame_t * frame)
468 return (mpls_label_disposition_inline(vm, node, frame, 0, 1,
469 FIB_MPLS_LSP_MODE_UNIFORM));
472 VLIB_REGISTER_NODE(ip6_mpls_label_disposition_uniform_node) = {
473 .name = "ip6-mpls-label-disposition-uniform",
474 .vector_size = sizeof(u32),
476 .format_trace = format_mpls_label_disposition_trace,
477 .sibling_of = "ip6-input",
478 .n_errors = IP6_N_ERROR,
479 .error_strings = ip6_error_strings,
482 #ifndef CLIB_MARCH_VARIANT
484 mpls_disp_dpo_mem_show (void)
486 fib_show_memory_usage("MPLS label",
487 pool_elts(mpls_disp_dpo_pool),
488 pool_len(mpls_disp_dpo_pool),
489 sizeof(mpls_disp_dpo_t));
492 const static dpo_vft_t mdd_vft = {
493 .dv_lock = mpls_disp_dpo_lock,
494 .dv_unlock = mpls_disp_dpo_unlock,
495 .dv_format = format_mpls_disp_dpo,
496 .dv_mem_show = mpls_disp_dpo_mem_show,
499 const static char* const mpls_label_disp_pipe_ip4_nodes[] =
501 "ip4-mpls-label-disposition-pipe",
504 const static char* const mpls_label_disp_pipe_ip6_nodes[] =
506 "ip6-mpls-label-disposition-pipe",
509 const static char* const * const mpls_label_disp_pipe_nodes[DPO_PROTO_NUM] =
511 [DPO_PROTO_IP4] = mpls_label_disp_pipe_ip4_nodes,
512 [DPO_PROTO_IP6] = mpls_label_disp_pipe_ip6_nodes,
515 const static char* const mpls_label_disp_uniform_ip4_nodes[] =
517 "ip4-mpls-label-disposition-uniform",
520 const static char* const mpls_label_disp_uniform_ip6_nodes[] =
522 "ip6-mpls-label-disposition-uniform",
525 const static char* const * const mpls_label_disp_uniform_nodes[DPO_PROTO_NUM] =
527 [DPO_PROTO_IP4] = mpls_label_disp_uniform_ip4_nodes,
528 [DPO_PROTO_IP6] = mpls_label_disp_uniform_ip6_nodes,
533 mpls_disp_dpo_module_init(void)
535 dpo_register(DPO_MPLS_DISPOSITION_PIPE, &mdd_vft,
536 mpls_label_disp_pipe_nodes);
537 dpo_register(DPO_MPLS_DISPOSITION_UNIFORM, &mdd_vft,
538 mpls_label_disp_uniform_nodes);
540 #endif /* CLIB_MARCH_VARIANT */