2 * Copyright (c) 2018 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.
15 #include <vppinfra/error.h>
16 #include <vppinfra/hash.h>
17 #include <vnet/vnet.h>
18 #include <vnet/ip/ip.h>
19 #include <vnet/ethernet/ethernet.h>
20 #include <vnet/vxlan-gbp/vxlan_gbp.h>
21 #include <vnet/qos/qos_types.h>
22 #include <vnet/adj/rewrite.h>
24 /* Statistics (not all errors) */
25 #define foreach_vxlan_gbp_encap_error \
26 _(ENCAPSULATED, "good packets encapsulated")
28 static char *vxlan_gbp_encap_error_strings[] = {
29 #define _(sym,string) string,
30 foreach_vxlan_gbp_encap_error
36 #define _(sym,str) VXLAN_GBP_ENCAP_ERROR_##sym,
37 foreach_vxlan_gbp_encap_error
39 VXLAN_GBP_ENCAP_N_ERROR,
40 } vxlan_gbp_encap_error_t;
44 VXLAN_GBP_ENCAP_NEXT_DROP,
45 VXLAN_GBP_ENCAP_N_NEXT,
46 } vxlan_gbp_encap_next_t;
54 } vxlan_gbp_encap_trace_t;
56 #ifndef CLIB_MARCH_VARIANT
58 format_vxlan_gbp_encap_trace (u8 * s, va_list * args)
60 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
61 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
62 vxlan_gbp_encap_trace_t *t = va_arg (*args, vxlan_gbp_encap_trace_t *);
66 "VXLAN_GBP encap to vxlan_gbp_tunnel%d vni %d sclass %d flags %d",
67 t->tunnel_index, t->vni, t->sclass, t->flags);
70 #endif /* CLIB_MARCH_VARIANT */
73 vxlan_gbp_encap_inline (vlib_main_t * vm,
74 vlib_node_runtime_t * node,
75 vlib_frame_t * from_frame, u8 is_ip4, u8 csum_offload)
77 u32 n_left_from, next_index, *from, *to_next;
78 vxlan_gbp_main_t *vxm = &vxlan_gbp_main;
79 vnet_main_t *vnm = vxm->vnet_main;
80 vnet_interface_main_t *im = &vnm->interface_main;
81 vlib_combined_counter_main_t *tx_counter =
82 im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_TX;
83 u32 pkts_encapsulated = 0;
84 u32 thread_index = vlib_get_thread_index ();
85 u32 sw_if_index0 = 0, sw_if_index1 = 0;
86 u32 next0 = 0, next1 = 0;
87 vxlan_gbp_tunnel_t *t0 = NULL, *t1 = NULL;
88 index_t dpoi_idx0 = INDEX_INVALID, dpoi_idx1 = INDEX_INVALID;
90 from = vlib_frame_vector_args (from_frame);
91 n_left_from = from_frame->n_vectors;
93 next_index = node->cached_next_index;
95 STATIC_ASSERT_SIZEOF (ip6_vxlan_gbp_header_t, 56);
96 STATIC_ASSERT_SIZEOF (ip4_vxlan_gbp_header_t, 36);
98 u8 const underlay_hdr_len = is_ip4 ?
99 sizeof (ip4_vxlan_gbp_header_t) : sizeof (ip6_vxlan_gbp_header_t);
100 u16 const l3_len = is_ip4 ? sizeof (ip4_header_t) : sizeof (ip6_header_t);
101 u32 const csum_flags = is_ip4 ?
102 VNET_BUFFER_F_OFFLOAD_IP_CKSUM | VNET_BUFFER_F_IS_IP4 |
103 VNET_BUFFER_F_OFFLOAD_UDP_CKSUM : VNET_BUFFER_F_OFFLOAD_UDP_CKSUM;
105 while (n_left_from > 0)
109 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
111 while (n_left_from >= 4 && n_left_to_next >= 2)
113 /* Prefetch next iteration. */
115 vlib_buffer_t *p2, *p3;
117 p2 = vlib_get_buffer (vm, from[2]);
118 p3 = vlib_get_buffer (vm, from[3]);
120 vlib_prefetch_buffer_header (p2, LOAD);
121 vlib_prefetch_buffer_header (p3, LOAD);
123 CLIB_PREFETCH (p2->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
124 CLIB_PREFETCH (p3->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
127 u32 bi0 = to_next[0] = from[0];
128 u32 bi1 = to_next[1] = from[1];
134 vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
135 vlib_buffer_t *b1 = vlib_get_buffer (vm, bi1);
136 u32 flow_hash0 = vnet_l2_compute_flow_hash (b0);
137 u32 flow_hash1 = vnet_l2_compute_flow_hash (b1);
139 /* Get next node index and adj index from tunnel next_dpo */
140 if (sw_if_index0 != vnet_buffer (b0)->sw_if_index[VLIB_TX])
142 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_TX];
143 vnet_hw_interface_t *hi0 =
144 vnet_get_sup_hw_interface (vnm, sw_if_index0);
145 t0 = &vxm->tunnels[hi0->dev_instance];
146 /* Note: change to always set next0 if it may set to drop */
147 next0 = t0->next_dpo.dpoi_next_node;
148 dpoi_idx0 = t0->next_dpo.dpoi_index;
151 /* Get next node index and adj index from tunnel next_dpo */
152 if (sw_if_index1 != vnet_buffer (b1)->sw_if_index[VLIB_TX])
154 if (sw_if_index0 == vnet_buffer (b1)->sw_if_index[VLIB_TX])
156 sw_if_index1 = sw_if_index0;
159 dpoi_idx1 = dpoi_idx0;
163 sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_TX];
164 vnet_hw_interface_t *hi1 =
165 vnet_get_sup_hw_interface (vnm, sw_if_index1);
166 t1 = &vxm->tunnels[hi1->dev_instance];
167 /* Note: change to always set next1 if it may set to drop */
168 next1 = t1->next_dpo.dpoi_next_node;
169 dpoi_idx1 = t1->next_dpo.dpoi_index;
173 vnet_buffer (b0)->ip.adj_index[VLIB_TX] = dpoi_idx0;
174 vnet_buffer (b1)->ip.adj_index[VLIB_TX] = dpoi_idx1;
176 ASSERT (t0->rewrite_header.data_bytes == underlay_hdr_len);
177 ASSERT (t1->rewrite_header.data_bytes == underlay_hdr_len);
178 vnet_rewrite_two_headers (*t0, *t1, vlib_buffer_get_current (b0),
179 vlib_buffer_get_current (b1),
182 vlib_buffer_advance (b0, -underlay_hdr_len);
183 vlib_buffer_advance (b1, -underlay_hdr_len);
185 u32 len0 = vlib_buffer_length_in_chain (vm, b0);
186 u32 len1 = vlib_buffer_length_in_chain (vm, b1);
187 u16 payload_l0 = clib_host_to_net_u16 (len0 - l3_len);
188 u16 payload_l1 = clib_host_to_net_u16 (len1 - l3_len);
190 void *underlay0 = vlib_buffer_get_current (b0);
191 void *underlay1 = vlib_buffer_get_current (b1);
193 ip4_header_t *ip4_0, *ip4_1;
194 qos_bits_t ip4_0_tos = 0, ip4_1_tos = 0;
195 ip6_header_t *ip6_0, *ip6_1;
196 udp_header_t *udp0, *udp1;
197 vxlan_gbp_header_t *vxlan_gbp0, *vxlan_gbp1;
201 ip4_vxlan_gbp_header_t *hdr0 = underlay0;
202 ip4_vxlan_gbp_header_t *hdr1 = underlay1;
204 /* Fix the IP4 checksum and length */
207 ip4_0->length = clib_host_to_net_u16 (len0);
208 ip4_1->length = clib_host_to_net_u16 (len1);
210 if (PREDICT_FALSE (b0->flags & VNET_BUFFER_F_QOS_DATA_VALID))
212 ip4_0_tos = vnet_buffer2 (b0)->qos.bits;
213 ip4_0->tos = ip4_0_tos;
215 if (PREDICT_FALSE (b1->flags & VNET_BUFFER_F_QOS_DATA_VALID))
217 ip4_1_tos = vnet_buffer2 (b1)->qos.bits;
218 ip4_1->tos = ip4_1_tos;
225 vxlan_gbp0 = &hdr0->vxlan_gbp;
226 vxlan_gbp1 = &hdr1->vxlan_gbp;
230 ip6_vxlan_gbp_header_t *hdr0 = underlay0;
231 ip6_vxlan_gbp_header_t *hdr1 = underlay1;
233 /* Fix IP6 payload length */
236 ip6_0->payload_length = payload_l0;
237 ip6_1->payload_length = payload_l1;
243 vxlan_gbp0 = &hdr0->vxlan_gbp;
244 vxlan_gbp1 = &hdr1->vxlan_gbp;
247 /* Fix UDP length and set source port */
248 udp0->length = payload_l0;
249 udp0->src_port = flow_hash0;
250 udp1->length = payload_l1;
251 udp1->src_port = flow_hash1;
253 /* set source class and gpflags */
254 vxlan_gbp0->gpflags = vnet_buffer2 (b0)->gbp.flags;
255 vxlan_gbp1->gpflags = vnet_buffer2 (b1)->gbp.flags;
257 clib_host_to_net_u16 (vnet_buffer2 (b0)->gbp.sclass);
259 clib_host_to_net_u16 (vnet_buffer2 (b1)->gbp.sclass);
263 b0->flags |= csum_flags;
264 vnet_buffer (b0)->l3_hdr_offset = l3_0 - b0->data;
265 vnet_buffer (b0)->l4_hdr_offset = (u8 *) udp0 - b0->data;
266 b1->flags |= csum_flags;
267 vnet_buffer (b1)->l3_hdr_offset = l3_1 - b1->data;
268 vnet_buffer (b1)->l4_hdr_offset = (u8 *) udp1 - b1->data;
270 /* IPv4 UDP checksum only if checksum offload is used */
273 ip_csum_t sum0 = ip4_0->checksum;
274 sum0 = ip_csum_update (sum0, 0, ip4_0->length, ip4_header_t,
275 length /* changed member */ );
276 if (PREDICT_FALSE (ip4_0_tos))
278 sum0 = ip_csum_update (sum0, 0, ip4_0_tos, ip4_header_t,
279 tos /* changed member */ );
281 ip4_0->checksum = ip_csum_fold (sum0);
282 ip_csum_t sum1 = ip4_1->checksum;
283 sum1 = ip_csum_update (sum1, 0, ip4_1->length, ip4_header_t,
284 length /* changed member */ );
285 if (PREDICT_FALSE (ip4_1_tos))
287 sum1 = ip_csum_update (sum1, 0, ip4_1_tos, ip4_header_t,
288 tos /* changed member */ );
290 ip4_1->checksum = ip_csum_fold (sum1);
292 /* IPv6 UDP checksum is mandatory */
297 udp0->checksum = ip6_tcp_udp_icmp_compute_checksum
298 (vm, b0, ip6_0, &bogus);
300 if (udp0->checksum == 0)
301 udp0->checksum = 0xffff;
302 udp1->checksum = ip6_tcp_udp_icmp_compute_checksum
303 (vm, b1, ip6_1, &bogus);
305 if (udp1->checksum == 0)
306 udp1->checksum = 0xffff;
309 vlib_increment_combined_counter (tx_counter, thread_index,
310 sw_if_index0, 1, len0);
311 vlib_increment_combined_counter (tx_counter, thread_index,
312 sw_if_index1, 1, len1);
313 pkts_encapsulated += 2;
315 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
317 vxlan_gbp_encap_trace_t *tr =
318 vlib_add_trace (vm, node, b0, sizeof (*tr));
319 tr->tunnel_index = t0 - vxm->tunnels;
321 tr->sclass = vnet_buffer2 (b0)->gbp.sclass;
322 tr->flags = vnet_buffer2 (b0)->gbp.flags;
325 if (PREDICT_FALSE (b1->flags & VLIB_BUFFER_IS_TRACED))
327 vxlan_gbp_encap_trace_t *tr =
328 vlib_add_trace (vm, node, b1, sizeof (*tr));
329 tr->tunnel_index = t1 - vxm->tunnels;
331 tr->sclass = vnet_buffer2 (b1)->gbp.sclass;
332 tr->flags = vnet_buffer2 (b1)->gbp.flags;
335 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
336 to_next, n_left_to_next,
337 bi0, bi1, next0, next1);
340 while (n_left_from > 0 && n_left_to_next > 0)
342 u32 bi0 = to_next[0] = from[0];
348 vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
349 u32 flow_hash0 = vnet_l2_compute_flow_hash (b0);
351 /* Get next node index and adj index from tunnel next_dpo */
352 if (sw_if_index0 != vnet_buffer (b0)->sw_if_index[VLIB_TX])
354 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_TX];
355 vnet_hw_interface_t *hi0 =
356 vnet_get_sup_hw_interface (vnm, sw_if_index0);
357 t0 = &vxm->tunnels[hi0->dev_instance];
358 /* Note: change to always set next0 if it may be set to drop */
359 next0 = t0->next_dpo.dpoi_next_node;
360 dpoi_idx0 = t0->next_dpo.dpoi_index;
362 vnet_buffer (b0)->ip.adj_index[VLIB_TX] = dpoi_idx0;
364 ASSERT (t0->rewrite_header.data_bytes == underlay_hdr_len);
365 vnet_rewrite_one_header (*t0, vlib_buffer_get_current (b0),
368 vlib_buffer_advance (b0, -underlay_hdr_len);
369 void *underlay0 = vlib_buffer_get_current (b0);
371 u32 len0 = vlib_buffer_length_in_chain (vm, b0);
372 u16 payload_l0 = clib_host_to_net_u16 (len0 - l3_len);
374 vxlan_gbp_header_t *vxlan_gbp0;
377 qos_bits_t ip4_0_tos = 0;
382 ip4_vxlan_gbp_header_t *hdr = underlay0;
384 /* Fix the IP4 checksum and length */
386 ip4_0->length = clib_host_to_net_u16 (len0);
388 if (PREDICT_FALSE (b0->flags & VNET_BUFFER_F_QOS_DATA_VALID))
390 ip4_0_tos = vnet_buffer2 (b0)->qos.bits;
391 ip4_0->tos = ip4_0_tos;
396 vxlan_gbp0 = &hdr->vxlan_gbp;
400 ip6_vxlan_gbp_header_t *hdr = underlay0;
402 /* Fix IP6 payload length */
404 ip6_0->payload_length = payload_l0;
408 vxlan_gbp0 = &hdr->vxlan_gbp;
411 /* Fix UDP length and set source port */
412 udp0->length = payload_l0;
413 udp0->src_port = flow_hash0;
415 /* set source class and gpflags */
416 vxlan_gbp0->gpflags = vnet_buffer2 (b0)->gbp.flags;
418 clib_host_to_net_u16 (vnet_buffer2 (b0)->gbp.sclass);
422 b0->flags |= csum_flags;
423 vnet_buffer (b0)->l3_hdr_offset = l3_0 - b0->data;
424 vnet_buffer (b0)->l4_hdr_offset = (u8 *) udp0 - b0->data;
426 /* IPv4 UDP checksum only if checksum offload is used */
429 ip_csum_t sum0 = ip4_0->checksum;
430 sum0 = ip_csum_update (sum0, 0, ip4_0->length, ip4_header_t,
431 length /* changed member */ );
432 if (PREDICT_FALSE (ip4_0_tos))
434 sum0 = ip_csum_update (sum0, 0, ip4_0_tos, ip4_header_t,
435 tos /* changed member */ );
437 ip4_0->checksum = ip_csum_fold (sum0);
439 /* IPv6 UDP checksum is mandatory */
444 udp0->checksum = ip6_tcp_udp_icmp_compute_checksum
445 (vm, b0, ip6_0, &bogus);
447 if (udp0->checksum == 0)
448 udp0->checksum = 0xffff;
451 vlib_increment_combined_counter (tx_counter, thread_index,
452 sw_if_index0, 1, len0);
455 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
457 vxlan_gbp_encap_trace_t *tr =
458 vlib_add_trace (vm, node, b0, sizeof (*tr));
459 tr->tunnel_index = t0 - vxm->tunnels;
461 tr->sclass = vnet_buffer2 (b0)->gbp.sclass;
462 tr->flags = vnet_buffer2 (b0)->gbp.flags;
464 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
465 to_next, n_left_to_next,
469 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
472 /* Do we still need this now that tunnel tx stats is kept? */
473 vlib_node_increment_counter (vm, node->node_index,
474 VXLAN_GBP_ENCAP_ERROR_ENCAPSULATED,
477 return from_frame->n_vectors;
480 VLIB_NODE_FN (vxlan4_gbp_encap_node) (vlib_main_t * vm,
481 vlib_node_runtime_t * node,
482 vlib_frame_t * from_frame)
484 /* Disable chksum offload as setup overhead in tx node is not worthwhile
485 for ip4 header checksum only, unless udp checksum is also required */
486 return vxlan_gbp_encap_inline (vm, node, from_frame, /* is_ip4 */ 1,
487 /* csum_offload */ 0);
490 VLIB_NODE_FN (vxlan6_gbp_encap_node) (vlib_main_t * vm,
491 vlib_node_runtime_t * node,
492 vlib_frame_t * from_frame)
494 /* Enable checksum offload for ip6 as udp checksum is mandatory, */
495 return vxlan_gbp_encap_inline (vm, node, from_frame, /* is_ip4 */ 0,
496 /* csum_offload */ 1);
500 VLIB_REGISTER_NODE (vxlan4_gbp_encap_node) =
502 .name = "vxlan4-gbp-encap",
503 .vector_size = sizeof (u32),
504 .format_trace = format_vxlan_gbp_encap_trace,
505 .type = VLIB_NODE_TYPE_INTERNAL,
506 .n_errors = ARRAY_LEN (vxlan_gbp_encap_error_strings),
507 .error_strings = vxlan_gbp_encap_error_strings,
508 .n_next_nodes = VXLAN_GBP_ENCAP_N_NEXT,
510 [VXLAN_GBP_ENCAP_NEXT_DROP] = "error-drop",
514 VLIB_REGISTER_NODE (vxlan6_gbp_encap_node) =
516 .name = "vxlan6-gbp-encap",
517 .vector_size = sizeof (u32),
518 .format_trace = format_vxlan_gbp_encap_trace,
519 .type = VLIB_NODE_TYPE_INTERNAL,
520 .n_errors = ARRAY_LEN (vxlan_gbp_encap_error_strings),
521 .error_strings = vxlan_gbp_encap_error_strings,
522 .n_next_nodes = VXLAN_GBP_ENCAP_N_NEXT,
524 [VXLAN_GBP_ENCAP_NEXT_DROP] = "error-drop",
530 * fd.io coding-style-patch-verification: ON
533 * eval: (c-set-style "gnu")