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Neale Ranns0bfe5d82016-08-25 15:29:12 +01001/*
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:
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
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.
14 */
15
16#include <vnet/adj/adj_nbr.h>
17#include <vnet/adj/adj_internal.h>
Neale Ranns5e575b12016-10-03 09:40:25 +010018#include <vnet/adj/adj_l2.h>
19#include <vnet/adj/adj_midchain.h>
Neale Ranns0bfe5d82016-08-25 15:29:12 +010020#include <vnet/ethernet/arp_packet.h>
21#include <vnet/dpo/drop_dpo.h>
22#include <vnet/fib/fib_walk.h>
23
Neale Ranns5e575b12016-10-03 09:40:25 +010024/**
25 * The two midchain tx feature node indices
26 */
Neale Ranns924d03a2016-10-19 08:25:46 +010027static u32 adj_midchain_tx_feature_node[VNET_LINK_NUM];
28static u32 adj_midchain_tx_no_count_feature_node[VNET_LINK_NUM];
Neale Ranns5e575b12016-10-03 09:40:25 +010029
30/**
31 * @brief Trace data for packets traversing the midchain tx node
32 */
33typedef struct adj_midchain_tx_trace_t_
34{
35 /**
36 * @brief the midchain adj we are traversing
37 */
38 adj_index_t ai;
39} adj_midchain_tx_trace_t;
40
41always_inline uword
Damjan Marion77766a12016-11-02 01:21:05 +010042adj_midchain_tx_inline (vlib_main_t * vm,
Neale Ranns5e575b12016-10-03 09:40:25 +010043 vlib_node_runtime_t * node,
44 vlib_frame_t * frame,
45 int interface_count)
46{
47 u32 * from, * to_next, n_left_from, n_left_to_next;
48 u32 next_index;
49 vnet_main_t *vnm = vnet_get_main ();
50 vnet_interface_main_t *im = &vnm->interface_main;
51 u32 cpu_index = vm->cpu_index;
52
53 /* Vector of buffer / pkt indices we're supposed to process */
54 from = vlib_frame_vector_args (frame);
55
56 /* Number of buffers / pkts */
57 n_left_from = frame->n_vectors;
58
59 /* Speculatively send the first buffer to the last disposition we used */
60 next_index = node->cached_next_index;
61
62 while (n_left_from > 0)
63 {
64 /* set up to enqueue to our disposition with index = next_index */
65 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
66
Neale Ranns5e575b12016-10-03 09:40:25 +010067
Neale Rannsd3b85b02016-10-22 15:17:21 -070068 while (n_left_from >= 4 && n_left_to_next > 2)
69 {
70 u32 bi0, adj_index0, next0;
71 const ip_adjacency_t * adj0;
72 const dpo_id_t *dpo0;
73 vlib_buffer_t * b0;
74 u32 bi1, adj_index1, next1;
75 const ip_adjacency_t * adj1;
76 const dpo_id_t *dpo1;
77 vlib_buffer_t * b1;
78
79 /* Prefetch next iteration. */
80 {
81 vlib_buffer_t * p2, * p3;
82
83 p2 = vlib_get_buffer (vm, from[2]);
84 p3 = vlib_get_buffer (vm, from[3]);
85
86 vlib_prefetch_buffer_header (p2, LOAD);
87 vlib_prefetch_buffer_header (p3, LOAD);
88
89 CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, STORE);
90 CLIB_PREFETCH (p3->data, CLIB_CACHE_LINE_BYTES, STORE);
91 }
92
93 bi0 = from[0];
94 to_next[0] = bi0;
95 bi1 = from[1];
96 to_next[1] = bi1;
97
98 from += 2;
99 to_next += 2;
100 n_left_from -= 2;
101 n_left_to_next -= 2;
102
103 b0 = vlib_get_buffer(vm, bi0);
104 b1 = vlib_get_buffer(vm, bi1);
105
106 /* Follow the DPO on which the midchain is stacked */
107 adj_index0 = vnet_buffer(b0)->ip.adj_index[VLIB_TX];
108 adj_index1 = vnet_buffer(b1)->ip.adj_index[VLIB_TX];
109
110 adj0 = adj_get(adj_index0);
111 adj1 = adj_get(adj_index1);
112
113 dpo0 = &adj0->sub_type.midchain.next_dpo;
114 dpo1 = &adj1->sub_type.midchain.next_dpo;
115
116 next0 = dpo0->dpoi_next_node;
117 next1 = dpo1->dpoi_next_node;
118
119 vnet_buffer(b1)->ip.adj_index[VLIB_TX] = dpo1->dpoi_index;
120 vnet_buffer(b0)->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
121
122 if (interface_count)
123 {
124 vlib_increment_combined_counter (im->combined_sw_if_counters
125 + VNET_INTERFACE_COUNTER_TX,
126 cpu_index,
127 adj0->rewrite_header.sw_if_index,
128 1,
129 vlib_buffer_length_in_chain (vm, b0));
130 vlib_increment_combined_counter (im->combined_sw_if_counters
131 + VNET_INTERFACE_COUNTER_TX,
132 cpu_index,
133 adj1->rewrite_header.sw_if_index,
134 1,
135 vlib_buffer_length_in_chain (vm, b1));
136 }
137
138 if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
139 {
140 adj_midchain_tx_trace_t *tr = vlib_add_trace (vm, node,
141 b0, sizeof (*tr));
142 tr->ai = adj_index0;
143 }
144 if (PREDICT_FALSE(b1->flags & VLIB_BUFFER_IS_TRACED))
145 {
146 adj_midchain_tx_trace_t *tr = vlib_add_trace (vm, node,
147 b1, sizeof (*tr));
148 tr->ai = adj_index1;
149 }
150
151 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
152 to_next, n_left_to_next,
153 bi0, bi1,
154 next0, next1);
155 }
Neale Ranns5e575b12016-10-03 09:40:25 +0100156 while (n_left_from > 0 && n_left_to_next > 0)
157 {
158 u32 bi0, adj_index0, next0;
159 const ip_adjacency_t * adj0;
160 const dpo_id_t *dpo0;
161 vlib_buffer_t * b0;
162
163 bi0 = from[0];
164 to_next[0] = bi0;
165 from += 1;
166 to_next += 1;
167 n_left_from -= 1;
168 n_left_to_next -= 1;
169
170 b0 = vlib_get_buffer(vm, bi0);
171
172 /* Follow the DPO on which the midchain is stacked */
173 adj_index0 = vnet_buffer(b0)->ip.adj_index[VLIB_TX];
174 adj0 = adj_get(adj_index0);
175 dpo0 = &adj0->sub_type.midchain.next_dpo;
176 next0 = dpo0->dpoi_next_node;
177 vnet_buffer(b0)->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
178
179 if (interface_count)
180 {
181 vlib_increment_combined_counter (im->combined_sw_if_counters
182 + VNET_INTERFACE_COUNTER_TX,
183 cpu_index,
184 adj0->rewrite_header.sw_if_index,
185 1,
186 vlib_buffer_length_in_chain (vm, b0));
187 }
188
189 if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
190 {
191 adj_midchain_tx_trace_t *tr = vlib_add_trace (vm, node,
192 b0, sizeof (*tr));
193 tr->ai = adj_index0;
194 }
195
196 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
197 to_next, n_left_to_next,
198 bi0, next0);
199 }
200
201 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
202 }
203
Neale Ranns5e575b12016-10-03 09:40:25 +0100204 return frame->n_vectors;
205}
206
207static u8 *
208format_adj_midchain_tx_trace (u8 * s, va_list * args)
209{
210 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
211 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
212 adj_midchain_tx_trace_t *tr = va_arg (*args, adj_midchain_tx_trace_t*);
213
214 s = format(s, "adj-midchain:[%d]:%U", tr->ai,
Neale Rannsb80c5362016-10-08 13:03:40 +0100215 format_ip_adjacency, tr->ai,
Neale Ranns5e575b12016-10-03 09:40:25 +0100216 FORMAT_IP_ADJACENCY_NONE);
217
218 return (s);
219}
220
221static uword
222adj_midchain_tx (vlib_main_t * vm,
223 vlib_node_runtime_t * node,
224 vlib_frame_t * frame)
225{
Damjan Marion77766a12016-11-02 01:21:05 +0100226 return (adj_midchain_tx_inline(vm, node, frame, 1));
Neale Ranns5e575b12016-10-03 09:40:25 +0100227}
228
229VLIB_REGISTER_NODE (adj_midchain_tx_node, static) = {
230 .function = adj_midchain_tx,
231 .name = "adj-midchain-tx",
232 .vector_size = sizeof (u32),
233
234 .format_trace = format_adj_midchain_tx_trace,
235
236 .n_next_nodes = 1,
237 .next_nodes = {
238 [0] = "error-drop",
239 },
240};
241
242static uword
243adj_midchain_tx_no_count (vlib_main_t * vm,
244 vlib_node_runtime_t * node,
245 vlib_frame_t * frame)
246{
Damjan Marion77766a12016-11-02 01:21:05 +0100247 return (adj_midchain_tx_inline(vm, node, frame, 0));
Neale Ranns5e575b12016-10-03 09:40:25 +0100248}
249
250VLIB_REGISTER_NODE (adj_midchain_tx_no_count_node, static) = {
251 .function = adj_midchain_tx_no_count,
252 .name = "adj-midchain-tx-no-count",
253 .vector_size = sizeof (u32),
254
255 .format_trace = format_adj_midchain_tx_trace,
256
257 .n_next_nodes = 1,
258 .next_nodes = {
259 [0] = "error-drop",
260 },
261};
262
Damjan Marion8b3191e2016-11-09 19:54:20 +0100263VNET_FEATURE_INIT (adj_midchain_tx_ip4, static) = {
264 .arc_name = "ip4-output",
Neale Ranns5e575b12016-10-03 09:40:25 +0100265 .node_name = "adj-midchain-tx",
Damjan Marion8b3191e2016-11-09 19:54:20 +0100266 .runs_before = VNET_FEATURES ("interface-output"),
267 .feature_index_ptr = &adj_midchain_tx_feature_node[VNET_LINK_IP4],
Neale Ranns5e575b12016-10-03 09:40:25 +0100268};
Damjan Marion8b3191e2016-11-09 19:54:20 +0100269VNET_FEATURE_INIT (adj_midchain_tx_no_count_ip4, static) = {
270 .arc_name = "ip4-output",
Neale Ranns5e575b12016-10-03 09:40:25 +0100271 .node_name = "adj-midchain-tx-no-count",
Damjan Marion8b3191e2016-11-09 19:54:20 +0100272 .runs_before = VNET_FEATURES ("interface-output"),
273 .feature_index_ptr = &adj_midchain_tx_no_count_feature_node[VNET_LINK_IP4],
Neale Ranns5e575b12016-10-03 09:40:25 +0100274};
Damjan Marion8b3191e2016-11-09 19:54:20 +0100275VNET_FEATURE_INIT (adj_midchain_tx_ip6, static) = {
276 .arc_name = "ip6-output",
Neale Ranns5e575b12016-10-03 09:40:25 +0100277 .node_name = "adj-midchain-tx",
Damjan Marion8b3191e2016-11-09 19:54:20 +0100278 .runs_before = VNET_FEATURES ("interface-output"),
279 .feature_index_ptr = &adj_midchain_tx_feature_node[VNET_LINK_IP6],
Neale Ranns5e575b12016-10-03 09:40:25 +0100280};
Damjan Marion8b3191e2016-11-09 19:54:20 +0100281VNET_FEATURE_INIT (adj_midchain_tx_no_count_ip6, static) = {
282 .arc_name = "ip6-output",
Neale Ranns5e575b12016-10-03 09:40:25 +0100283 .node_name = "adj-midchain-tx-no-count",
Damjan Marion8b3191e2016-11-09 19:54:20 +0100284 .runs_before = VNET_FEATURES ("interface-output"),
285 .feature_index_ptr = &adj_midchain_tx_no_count_feature_node[VNET_LINK_IP6],
Neale Ranns5e575b12016-10-03 09:40:25 +0100286};
Damjan Marion8b3191e2016-11-09 19:54:20 +0100287VNET_FEATURE_INIT (adj_midchain_tx_mpls, static) = {
288 .arc_name = "mpls-output",
Damjan Marion77766a12016-11-02 01:21:05 +0100289 .node_name = "adj-midchain-tx",
Damjan Marion8b3191e2016-11-09 19:54:20 +0100290 .runs_before = VNET_FEATURES ("interface-output"),
291 .feature_index_ptr = &adj_midchain_tx_feature_node[VNET_LINK_MPLS],
Neale Ranns5e575b12016-10-03 09:40:25 +0100292};
Damjan Marion8b3191e2016-11-09 19:54:20 +0100293VNET_FEATURE_INIT (adj_midchain_tx_no_count_mpls, static) = {
294 .arc_name = "mpls-output",
Neale Ranns5e575b12016-10-03 09:40:25 +0100295 .node_name = "adj-midchain-tx-no-count",
Damjan Marion8b3191e2016-11-09 19:54:20 +0100296 .runs_before = VNET_FEATURES ("interface-output"),
297 .feature_index_ptr = &adj_midchain_tx_no_count_feature_node[VNET_LINK_MPLS],
Neale Ranns5e575b12016-10-03 09:40:25 +0100298};
Damjan Marion8b3191e2016-11-09 19:54:20 +0100299VNET_FEATURE_INIT (adj_midchain_tx_ethernet, static) = {
300 .arc_name = "ethernet-output",
Neale Ranns5e575b12016-10-03 09:40:25 +0100301 .node_name = "adj-midchain-tx",
Damjan Marion8b3191e2016-11-09 19:54:20 +0100302 .runs_before = VNET_FEATURES ("error-drop"),
303 .feature_index_ptr = &adj_midchain_tx_feature_node[VNET_LINK_ETHERNET],
Neale Ranns5e575b12016-10-03 09:40:25 +0100304};
Damjan Marion8b3191e2016-11-09 19:54:20 +0100305VNET_FEATURE_INIT (adj_midchain_tx_no_count_ethernet, static) = {
306 .arc_name = "ethernet-output",
Neale Ranns5e575b12016-10-03 09:40:25 +0100307 .node_name = "adj-midchain-tx-no-count",
Damjan Marion8b3191e2016-11-09 19:54:20 +0100308 .runs_before = VNET_FEATURES ("error-drop"),
309 .feature_index_ptr = &adj_midchain_tx_no_count_feature_node[VNET_LINK_ETHERNET],
Neale Ranns5e575b12016-10-03 09:40:25 +0100310};
311
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100312static inline u32
Neale Ranns924d03a2016-10-19 08:25:46 +0100313adj_get_midchain_node (vnet_link_t link)
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100314{
315 switch (link) {
Neale Ranns924d03a2016-10-19 08:25:46 +0100316 case VNET_LINK_IP4:
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100317 return (ip4_midchain_node.index);
Neale Ranns924d03a2016-10-19 08:25:46 +0100318 case VNET_LINK_IP6:
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100319 return (ip6_midchain_node.index);
Neale Ranns924d03a2016-10-19 08:25:46 +0100320 case VNET_LINK_MPLS:
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100321 return (mpls_midchain_node.index);
Neale Ranns924d03a2016-10-19 08:25:46 +0100322 case VNET_LINK_ETHERNET:
Neale Ranns5e575b12016-10-03 09:40:25 +0100323 return (adj_l2_midchain_node.index);
Neale Ranns924d03a2016-10-19 08:25:46 +0100324 case VNET_LINK_ARP:
325 break;
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100326 }
327 ASSERT(0);
328 return (0);
329}
330
Damjan Marion8b3191e2016-11-09 19:54:20 +0100331static u8
332adj_midchain_get_feature_arc_index_for_link_type (const ip_adjacency_t *adj)
Neale Ranns5e575b12016-10-03 09:40:25 +0100333{
Damjan Marion8b3191e2016-11-09 19:54:20 +0100334 u8 arc = (u8) ~0;
Neale Ranns5e575b12016-10-03 09:40:25 +0100335 switch (adj->ia_link)
336 {
Neale Ranns924d03a2016-10-19 08:25:46 +0100337 case VNET_LINK_IP4:
Neale Ranns5e575b12016-10-03 09:40:25 +0100338 {
Damjan Marion8b3191e2016-11-09 19:54:20 +0100339 arc = ip4_main.lookup_main.output_feature_arc_index;
Neale Ranns5e575b12016-10-03 09:40:25 +0100340 break;
341 }
Neale Ranns924d03a2016-10-19 08:25:46 +0100342 case VNET_LINK_IP6:
Neale Ranns5e575b12016-10-03 09:40:25 +0100343 {
Damjan Marion8b3191e2016-11-09 19:54:20 +0100344 arc = ip6_main.lookup_main.output_feature_arc_index;
Neale Ranns5e575b12016-10-03 09:40:25 +0100345 break;
346 }
Neale Ranns924d03a2016-10-19 08:25:46 +0100347 case VNET_LINK_MPLS:
Neale Ranns5e575b12016-10-03 09:40:25 +0100348 {
Damjan Marion8b3191e2016-11-09 19:54:20 +0100349 arc = mpls_main.output_feature_arc_index;
Neale Ranns5e575b12016-10-03 09:40:25 +0100350 break;
351 }
Neale Ranns924d03a2016-10-19 08:25:46 +0100352 case VNET_LINK_ETHERNET:
Neale Ranns5e575b12016-10-03 09:40:25 +0100353 {
Damjan Marion8b3191e2016-11-09 19:54:20 +0100354 arc = ethernet_main.output_feature_arc_index;
Neale Ranns5e575b12016-10-03 09:40:25 +0100355 break;
356 }
Neale Ranns924d03a2016-10-19 08:25:46 +0100357 case VNET_LINK_ARP:
358 ASSERT(0);
359 break;
Neale Ranns5e575b12016-10-03 09:40:25 +0100360 }
361
Damjan Marion8b3191e2016-11-09 19:54:20 +0100362 ASSERT (arc != (u8) ~0);
363
364 return (arc);
Neale Ranns5e575b12016-10-03 09:40:25 +0100365}
366
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100367/**
368 * adj_nbr_midchain_update_rewrite
369 *
370 * Update the adjacency's rewrite string. A NULL string implies the
371 * rewrite is reset (i.e. when ARP/ND etnry is gone).
372 * NB: the adj being updated may be handling traffic in the DP.
373 */
374void
375adj_nbr_midchain_update_rewrite (adj_index_t adj_index,
Neale Ranns5e575b12016-10-03 09:40:25 +0100376 adj_midchain_fixup_t fixup,
377 adj_midchain_flag_t flags,
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100378 u8 *rewrite)
379{
380 ip_adjacency_t *adj;
Damjan Marion8b3191e2016-11-09 19:54:20 +0100381 u8 arc_index;
382 u32 feature_index;
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100383
384 ASSERT(ADJ_INDEX_INVALID != adj_index);
385
386 adj = adj_get(adj_index);
Neale Rannsb80c5362016-10-08 13:03:40 +0100387
388 /*
389 * one time only update. since we don't support chainging the tunnel
390 * src,dst, this is all we need.
391 */
392 ASSERT(adj->lookup_next_index == IP_LOOKUP_NEXT_ARP);
393 /*
394 * tunnels can always provide a rewrite.
395 */
396 ASSERT(NULL != rewrite);
397
Neale Ranns5e575b12016-10-03 09:40:25 +0100398 adj->sub_type.midchain.fixup_func = fixup;
399
Damjan Marion8b3191e2016-11-09 19:54:20 +0100400 arc_index = adj_midchain_get_feature_arc_index_for_link_type (adj);
401 feature_index = (flags & ADJ_MIDCHAIN_FLAG_NO_COUNT) ?
402 adj_midchain_tx_no_count_feature_node[adj->ia_link] :
403 adj_midchain_tx_feature_node[adj->ia_link];
Neale Ranns5e575b12016-10-03 09:40:25 +0100404
Damjan Marion8b3191e2016-11-09 19:54:20 +0100405 adj->sub_type.midchain.tx_function_node = (flags & ADJ_MIDCHAIN_FLAG_NO_COUNT) ?
406 adj_midchain_tx_no_count_node.index :
407 adj_midchain_tx_node.index;
Neale Ranns5e575b12016-10-03 09:40:25 +0100408
Damjan Marion8b3191e2016-11-09 19:54:20 +0100409 vnet_feature_enable_disable_with_index (arc_index, feature_index,
410 adj->rewrite_header.sw_if_index,
411 1 /* enable */, 0, 0);
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100412
Neale Rannsb80c5362016-10-08 13:03:40 +0100413 /*
414 * stack the midchain on the drop so it's ready to forward in the adj-midchain-tx.
415 * The graph arc used/created here is from the midchain-tx node to the
416 * child's registered node. This is because post adj processing the next
417 * node are any output features, then the midchain-tx. from there we
418 * need to get to the stacked child's node.
419 */
420 dpo_stack_from_node(adj->sub_type.midchain.tx_function_node,
421 &adj->sub_type.midchain.next_dpo,
Neale Ranns924d03a2016-10-19 08:25:46 +0100422 drop_dpo_get(vnet_link_to_dpo_proto(adj->ia_link)));
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100423
Neale Rannsb80c5362016-10-08 13:03:40 +0100424 /*
425 * update the rewirte with the workers paused.
426 */
427 adj_nbr_update_rewrite_internal(adj,
428 IP_LOOKUP_NEXT_MIDCHAIN,
429 adj_get_midchain_node(adj->ia_link),
430 adj->sub_type.midchain.tx_function_node,
431 rewrite);
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100432}
433
434/**
Neale Ranns5e575b12016-10-03 09:40:25 +0100435 * adj_nbr_midchain_unstack
436 *
437 * Unstack the adj. stack it on drop
438 */
439void
440adj_nbr_midchain_unstack (adj_index_t adj_index)
441{
442 ip_adjacency_t *adj;
443
444 ASSERT(ADJ_INDEX_INVALID != adj_index);
445
446 adj = adj_get(adj_index);
447
448 /*
449 * stack on the drop
450 */
451 dpo_stack(DPO_ADJACENCY_MIDCHAIN,
Neale Ranns924d03a2016-10-19 08:25:46 +0100452 vnet_link_to_dpo_proto(adj->ia_link),
Neale Ranns5e575b12016-10-03 09:40:25 +0100453 &adj->sub_type.midchain.next_dpo,
Neale Ranns924d03a2016-10-19 08:25:46 +0100454 drop_dpo_get(vnet_link_to_dpo_proto(adj->ia_link)));
Neale Ranns5e575b12016-10-03 09:40:25 +0100455
456 CLIB_MEMORY_BARRIER();
457}
458
459/**
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100460 * adj_nbr_midchain_stack
461 */
462void
463adj_nbr_midchain_stack (adj_index_t adj_index,
464 const dpo_id_t *next)
465{
466 ip_adjacency_t *adj;
467
468 ASSERT(ADJ_INDEX_INVALID != adj_index);
469
470 adj = adj_get(adj_index);
471
472 ASSERT(IP_LOOKUP_NEXT_MIDCHAIN == adj->lookup_next_index);
473
474 dpo_stack_from_node(adj->sub_type.midchain.tx_function_node,
Neale Ranns5e575b12016-10-03 09:40:25 +0100475 &adj->sub_type.midchain.next_dpo,
476 next);
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100477}
478
479u8*
480format_adj_midchain (u8* s, va_list *ap)
481{
Billy McFallcfcf1e22016-10-14 09:51:49 -0400482 index_t index = va_arg(*ap, index_t);
483 u32 indent = va_arg(*ap, u32);
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100484 vnet_main_t * vnm = vnet_get_main();
485 ip_adjacency_t * adj = adj_get(index);
486
Neale Ranns924d03a2016-10-19 08:25:46 +0100487 s = format (s, "%U", format_vnet_link, adj->ia_link);
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100488 s = format (s, " via %U ",
489 format_ip46_address, &adj->sub_type.nbr.next_hop);
490 s = format (s, " %U",
Neale Ranns5e575b12016-10-03 09:40:25 +0100491 format_vnet_rewrite,
492 vnm->vlib_main, &adj->rewrite_header,
493 sizeof (adj->rewrite_data), indent);
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100494 s = format (s, "\n%Ustacked-on:\n%U%U",
Neale Ranns5e575b12016-10-03 09:40:25 +0100495 format_white_space, indent,
496 format_white_space, indent+2,
497 format_dpo_id, &adj->sub_type.midchain.next_dpo, indent+2);
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100498
499 return (s);
500}
501
502static void
503adj_dpo_lock (dpo_id_t *dpo)
504{
505 adj_lock(dpo->dpoi_index);
506}
507static void
508adj_dpo_unlock (dpo_id_t *dpo)
509{
510 adj_unlock(dpo->dpoi_index);
511}
512
513const static dpo_vft_t adj_midchain_dpo_vft = {
514 .dv_lock = adj_dpo_lock,
515 .dv_unlock = adj_dpo_unlock,
516 .dv_format = format_adj_midchain,
517};
518
519/**
520 * @brief The per-protocol VLIB graph nodes that are assigned to a midchain
521 * object.
522 *
523 * this means that these graph nodes are ones from which a midchain is the
524 * parent object in the DPO-graph.
525 */
526const static char* const midchain_ip4_nodes[] =
527{
528 "ip4-midchain",
529 NULL,
530};
531const static char* const midchain_ip6_nodes[] =
532{
533 "ip6-midchain",
534 NULL,
535};
536const static char* const midchain_mpls_nodes[] =
537{
538 "mpls-midchain",
539 NULL,
540};
Neale Ranns5e575b12016-10-03 09:40:25 +0100541const static char* const midchain_ethernet_nodes[] =
542{
543 "adj-l2-midchain",
544 NULL,
545};
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100546
547const static char* const * const midchain_nodes[DPO_PROTO_NUM] =
548{
549 [DPO_PROTO_IP4] = midchain_ip4_nodes,
550 [DPO_PROTO_IP6] = midchain_ip6_nodes,
551 [DPO_PROTO_MPLS] = midchain_mpls_nodes,
Neale Ranns5e575b12016-10-03 09:40:25 +0100552 [DPO_PROTO_ETHERNET] = midchain_ethernet_nodes,
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100553};
554
555void
556adj_midchain_module_init (void)
557{
558 dpo_register(DPO_ADJACENCY_MIDCHAIN, &adj_midchain_dpo_vft, midchain_nodes);
559}