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Ed Warnickecb9cada2015-12-08 15:45:58 -07001/*
2 * l2_learn.c : layer 2 learning using l2fib
3 *
4 * Copyright (c) 2013 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:
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
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.
16 */
17
18#include <vlib/vlib.h>
19#include <vnet/vnet.h>
20#include <vnet/pg/pg.h>
21#include <vnet/ethernet/ethernet.h>
22#include <vlib/cli.h>
23
24#include <vnet/l2/l2_input.h>
25#include <vnet/l2/feat_bitmap.h>
26#include <vnet/l2/l2_fib.h>
27#include <vnet/l2/l2_learn.h>
28
29#include <vppinfra/error.h>
30#include <vppinfra/hash.h>
31
Dave Wallace71612d62017-10-24 01:32:41 -040032l2learn_main_t l2learn_main;
33
Chris Luke16bcf7d2016-09-01 14:31:46 -040034/**
35 * @file
Billy McFall22aa3e92016-09-09 08:46:40 -040036 * @brief Ethernet Bridge Learning.
Ed Warnickecb9cada2015-12-08 15:45:58 -070037 *
38 * Populate the mac table with entries mapping the packet's source mac + bridge
Dave Barach97d8dc22016-08-15 15:31:15 -040039 * domain ID to the input sw_if_index.
Ed Warnickecb9cada2015-12-08 15:45:58 -070040 *
41 * Note that learning and forwarding are separate graph nodes. This means that
42 * for a set of packets, all learning is performed first, then all nodes are
43 * forwarded. The forwarding is done based on the end-state of the mac table,
44 * instead of the state after each packet. Thus the forwarding results could
45 * differ in certain cases (mac move tests), but this not expected to cause
46 * problems in real-world networks. It is much simpler to separate learning
47 * and forwarding into separate nodes.
48 */
49
50
Dave Barach97d8dc22016-08-15 15:31:15 -040051typedef struct
52{
Ed Warnickecb9cada2015-12-08 15:45:58 -070053 u8 src[6];
54 u8 dst[6];
55 u32 sw_if_index;
56 u16 bd_index;
57} l2learn_trace_t;
58
59
60/* packet trace format function */
Dave Barach97d8dc22016-08-15 15:31:15 -040061static u8 *
62format_l2learn_trace (u8 * s, va_list * args)
Ed Warnickecb9cada2015-12-08 15:45:58 -070063{
64 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
65 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
Dave Barach97d8dc22016-08-15 15:31:15 -040066 l2learn_trace_t *t = va_arg (*args, l2learn_trace_t *);
67
Ed Warnickecb9cada2015-12-08 15:45:58 -070068 s = format (s, "l2-learn: sw_if_index %d dst %U src %U bd_index %d",
Dave Barach97d8dc22016-08-15 15:31:15 -040069 t->sw_if_index,
70 format_ethernet_address, t->dst,
71 format_ethernet_address, t->src, t->bd_index);
Ed Warnickecb9cada2015-12-08 15:45:58 -070072 return s;
73}
74
75static vlib_node_registration_t l2learn_node;
76
77#define foreach_l2learn_error \
78_(L2LEARN, "L2 learn packets") \
79_(MISS, "L2 learn misses") \
80_(MAC_MOVE, "L2 mac moves") \
81_(MAC_MOVE_VIOLATE, "L2 mac move violations") \
82_(LIMIT, "L2 not learned due to limit") \
John Lodbfa5742017-09-02 08:27:36 -040083_(HIT_UPDATE, "L2 learn hit updates") \
Dave Barach97d8dc22016-08-15 15:31:15 -040084_(FILTER_DROP, "L2 filter mac drops")
Ed Warnickecb9cada2015-12-08 15:45:58 -070085
Dave Barach97d8dc22016-08-15 15:31:15 -040086typedef enum
87{
Ed Warnickecb9cada2015-12-08 15:45:58 -070088#define _(sym,str) L2LEARN_ERROR_##sym,
89 foreach_l2learn_error
90#undef _
Dave Barach97d8dc22016-08-15 15:31:15 -040091 L2LEARN_N_ERROR,
Ed Warnickecb9cada2015-12-08 15:45:58 -070092} l2learn_error_t;
93
Dave Barach97d8dc22016-08-15 15:31:15 -040094static char *l2learn_error_strings[] = {
Ed Warnickecb9cada2015-12-08 15:45:58 -070095#define _(sym,string) string,
96 foreach_l2learn_error
97#undef _
98};
99
Dave Barach97d8dc22016-08-15 15:31:15 -0400100typedef enum
101{
Ed Warnickecb9cada2015-12-08 15:45:58 -0700102 L2LEARN_NEXT_L2FWD,
103 L2LEARN_NEXT_DROP,
104 L2LEARN_N_NEXT,
105} l2learn_next_t;
106
107
Chris Luke16bcf7d2016-09-01 14:31:46 -0400108/** Perform learning on one packet based on the mac table lookup result. */
Ed Warnickecb9cada2015-12-08 15:45:58 -0700109
110static_always_inline void
111l2learn_process (vlib_node_runtime_t * node,
Dave Barach97d8dc22016-08-15 15:31:15 -0400112 l2learn_main_t * msm,
113 u64 * counter_base,
114 vlib_buffer_t * b0,
115 u32 sw_if_index0,
116 l2fib_entry_key_t * key0,
117 l2fib_entry_key_t * cached_key,
John Lodbfa5742017-09-02 08:27:36 -0400118 u32 * count,
Damjan Mariond171d482016-12-05 14:16:38 +0100119 l2fib_entry_result_t * result0, u32 * next0, u8 timestamp)
Ed Warnickecb9cada2015-12-08 15:45:58 -0700120{
Dave Barach97d8dc22016-08-15 15:31:15 -0400121 /* Set up the default next node (typically L2FWD) */
John Lobeb0b2e2017-07-22 00:21:36 -0400122 *next0 = vnet_l2_feature_next (b0, msm->feat_next_node_index,
123 L2INPUT_FEAT_LEARN);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700124
Dave Barach97d8dc22016-08-15 15:31:15 -0400125 /* Check mac table lookup result */
Dave Barach97d8dc22016-08-15 15:31:15 -0400126 if (PREDICT_TRUE (result0->fields.sw_if_index == sw_if_index0))
127 {
John Lo8d00fff2017-08-03 00:35:36 -0400128 /* Entry in L2FIB with matching sw_if_index matched - normal fast path */
John Lodbfa5742017-09-02 08:27:36 -0400129 u32 dtime = timestamp - result0->fields.timestamp;
130 u32 dsn = result0->fields.sn.as_u16 - vnet_buffer (b0)->l2.l2fib_sn;
John Lo5a6508d2017-10-03 13:13:47 -0400131 u32 check = (dtime && vnet_buffer (b0)->l2.bd_age) || dsn;
Eyal Bari31a71ab2017-06-25 14:42:33 +0300132
John Lodbfa5742017-09-02 08:27:36 -0400133 if (PREDICT_TRUE (check == 0))
134 return; /* MAC entry up to date */
135 if (result0->fields.age_not)
136 return; /* Static MAC always age_not */
137 if (msm->global_learn_count > msm->global_learn_limit)
John Loe531f4c2017-08-22 09:16:50 -0400138 return; /* Above learn limit - do not update */
John Lodbfa5742017-09-02 08:27:36 -0400139
140 /* Limit updates per l2-learn node call to avoid prolonged update burst
John Lo5a6508d2017-10-03 13:13:47 -0400141 * as dtime advance over 1 minute mark, unless more than 1 min behind
142 * or SN obsolete */
143 if ((*count > 2) && (dtime == 1) && (dsn == 0))
John Lodbfa5742017-09-02 08:27:36 -0400144 return;
145
146 counter_base[L2LEARN_ERROR_HIT_UPDATE] += 1;
147 *count += 1;
Dave Barach97d8dc22016-08-15 15:31:15 -0400148 }
149 else if (result0->raw == ~0)
150 {
John Lo8d00fff2017-08-03 00:35:36 -0400151 /* Entry not in L2FIB - add it */
Dave Barach97d8dc22016-08-15 15:31:15 -0400152 counter_base[L2LEARN_ERROR_MISS] += 1;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700153
John Lo8d00fff2017-08-03 00:35:36 -0400154 if (msm->global_learn_count >= msm->global_learn_limit)
Dave Barach97d8dc22016-08-15 15:31:15 -0400155 {
156 /*
157 * Global limit reached. Do not learn the mac but forward the packet.
158 * In the future, limits could also be per-interface or bridge-domain.
159 */
160 counter_base[L2LEARN_ERROR_LIMIT] += 1;
Eyal Bari31a71ab2017-06-25 14:42:33 +0300161 return;
Dave Barach97d8dc22016-08-15 15:31:15 -0400162 }
Ed Warnickecb9cada2015-12-08 15:45:58 -0700163
John Lo8d00fff2017-08-03 00:35:36 -0400164 /* Do not learn if mac is 0 */
165 l2fib_entry_key_t key = *key0;
166 key.fields.bd_index = 0;
167 if (key.raw == 0)
168 return;
169
Eyal Bari31a71ab2017-06-25 14:42:33 +0300170 /* It is ok to learn */
171 msm->global_learn_count++;
172 result0->raw = 0; /* clear all fields */
173 result0->fields.sw_if_index = sw_if_index0;
John Lo8d00fff2017-08-03 00:35:36 -0400174 result0->fields.lrn_evt = (msm->client_pid != 0);
Dave Barach97d8dc22016-08-15 15:31:15 -0400175 }
176 else
177 {
John Lo8d00fff2017-08-03 00:35:36 -0400178 /* Entry in L2FIB with different sw_if_index - mac move or filter */
Eyal Bari31a71ab2017-06-25 14:42:33 +0300179 if (result0->fields.filter)
180 {
181 ASSERT (result0->fields.sw_if_index == ~0);
182 /* drop packet because lookup matched a filter mac entry */
183 b0->error = node->errors[L2LEARN_ERROR_FILTER_DROP];
184 *next0 = L2LEARN_NEXT_DROP;
185 return;
186 }
187
Dave Barach97d8dc22016-08-15 15:31:15 -0400188 if (result0->fields.static_mac)
189 {
190 /*
191 * Don't overwrite a static mac
192 * TODO: Check violation policy. For now drop the packet
193 */
194 b0->error = node->errors[L2LEARN_ERROR_MAC_MOVE_VIOLATE];
195 *next0 = L2LEARN_NEXT_DROP;
Eyal Bari31a71ab2017-06-25 14:42:33 +0300196 return;
Dave Barach97d8dc22016-08-15 15:31:15 -0400197 }
Dave Barach97d8dc22016-08-15 15:31:15 -0400198
Eyal Bari31a71ab2017-06-25 14:42:33 +0300199 /*
200 * TODO: may want to rate limit mac moves
201 * TODO: check global/bridge domain/interface learn limits
202 */
203 result0->fields.sw_if_index = sw_if_index0;
John Lo8d00fff2017-08-03 00:35:36 -0400204 if (result0->fields.age_not) /* The mac was provisioned */
205 {
206 msm->global_learn_count++;
207 result0->fields.age_not = 0;
208 }
209 result0->fields.lrn_evt = (msm->client_pid != 0);
John Loe23c99e2018-03-13 21:53:18 -0400210 result0->fields.lrn_mov = (msm->client_pid != 0);
John Lo8d00fff2017-08-03 00:35:36 -0400211 counter_base[L2LEARN_ERROR_MAC_MOVE] += 1;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700212 }
213
Eyal Bari31a71ab2017-06-25 14:42:33 +0300214 /* Update the entry */
215 result0->fields.timestamp = timestamp;
216 result0->fields.sn.as_u16 = vnet_buffer (b0)->l2.l2fib_sn;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700217
Eyal Bari31a71ab2017-06-25 14:42:33 +0300218 BVT (clib_bihash_kv) kv;
219 kv.key = key0->raw;
220 kv.value = result0->raw;
221 BV (clib_bihash_add_del) (msm->mac_table, &kv, 1 /* is_add */ );
John Lodbfa5742017-09-02 08:27:36 -0400222
223 /* Invalidate the cache */
224 cached_key->raw = ~0;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700225}
226
227
Dave Barach681abe42017-02-15 09:01:01 -0500228static_always_inline uword
229l2learn_node_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
230 vlib_frame_t * frame, int do_trace)
Ed Warnickecb9cada2015-12-08 15:45:58 -0700231{
Dave Barach97d8dc22016-08-15 15:31:15 -0400232 u32 n_left_from, *from, *to_next;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700233 l2learn_next_t next_index;
Dave Barach97d8dc22016-08-15 15:31:15 -0400234 l2learn_main_t *msm = &l2learn_main;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700235 vlib_node_t *n = vlib_get_node (vm, l2learn_node.index);
236 u32 node_counter_base_index = n->error_heap_index;
Dave Barach97d8dc22016-08-15 15:31:15 -0400237 vlib_error_main_t *em = &vm->error_main;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700238 l2fib_entry_key_t cached_key;
239 l2fib_entry_result_t cached_result;
Damjan Mariond171d482016-12-05 14:16:38 +0100240 u8 timestamp = (u8) (vlib_time_now (vm) / 60);
John Lodbfa5742017-09-02 08:27:36 -0400241 u32 count = 0;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700242
243 from = vlib_frame_vector_args (frame);
Dave Barach97d8dc22016-08-15 15:31:15 -0400244 n_left_from = frame->n_vectors; /* number of packets to process */
Ed Warnickecb9cada2015-12-08 15:45:58 -0700245 next_index = node->cached_next_index;
Dave Barach97d8dc22016-08-15 15:31:15 -0400246
247 /* Clear the one-entry cache in case mac table was updated */
248 cached_key.raw = ~0;
249 cached_result.raw = ~0; /* warning be gone */
Ed Warnickecb9cada2015-12-08 15:45:58 -0700250
251 while (n_left_from > 0)
252 {
253 u32 n_left_to_next;
254
255 /* get space to enqueue frame to graph node "next_index" */
Dave Barach97d8dc22016-08-15 15:31:15 -0400256 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700257
Damjan Mariondc5252b2016-11-24 19:25:01 -0800258 while (n_left_from >= 8 && n_left_to_next >= 4)
Ed Warnickecb9cada2015-12-08 15:45:58 -0700259 {
Damjan Mariondc5252b2016-11-24 19:25:01 -0800260 u32 bi0, bi1, bi2, bi3;
261 vlib_buffer_t *b0, *b1, *b2, *b3;
262 u32 next0, next1, next2, next3;
263 u32 sw_if_index0, sw_if_index1, sw_if_index2, sw_if_index3;
264 ethernet_header_t *h0, *h1, *h2, *h3;
265 l2fib_entry_key_t key0, key1, key2, key3;
266 l2fib_entry_result_t result0, result1, result2, result3;
267 u32 bucket0, bucket1, bucket2, bucket3;
Dave Barach97d8dc22016-08-15 15:31:15 -0400268
Ed Warnickecb9cada2015-12-08 15:45:58 -0700269 /* Prefetch next iteration. */
270 {
Damjan Mariondc5252b2016-11-24 19:25:01 -0800271 vlib_buffer_t *p4, *p5, *p6, *p7;;
Dave Barach97d8dc22016-08-15 15:31:15 -0400272
Damjan Mariondc5252b2016-11-24 19:25:01 -0800273 p4 = vlib_get_buffer (vm, from[4]);
274 p5 = vlib_get_buffer (vm, from[5]);
275 p6 = vlib_get_buffer (vm, from[6]);
276 p7 = vlib_get_buffer (vm, from[7]);
Dave Barach97d8dc22016-08-15 15:31:15 -0400277
Damjan Mariondc5252b2016-11-24 19:25:01 -0800278 vlib_prefetch_buffer_header (p4, LOAD);
279 vlib_prefetch_buffer_header (p5, LOAD);
280 vlib_prefetch_buffer_header (p6, LOAD);
281 vlib_prefetch_buffer_header (p7, LOAD);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700282
Damjan Mariondc5252b2016-11-24 19:25:01 -0800283 CLIB_PREFETCH (p4->data, CLIB_CACHE_LINE_BYTES, STORE);
284 CLIB_PREFETCH (p5->data, CLIB_CACHE_LINE_BYTES, STORE);
285 CLIB_PREFETCH (p6->data, CLIB_CACHE_LINE_BYTES, STORE);
286 CLIB_PREFETCH (p7->data, CLIB_CACHE_LINE_BYTES, STORE);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700287 }
288
Dave Barach97d8dc22016-08-15 15:31:15 -0400289 /* speculatively enqueue b0 and b1 to the current next frame */
290 /* bi is "buffer index", b is pointer to the buffer */
Ed Warnickecb9cada2015-12-08 15:45:58 -0700291 to_next[0] = bi0 = from[0];
292 to_next[1] = bi1 = from[1];
Damjan Mariondc5252b2016-11-24 19:25:01 -0800293 to_next[2] = bi2 = from[2];
294 to_next[3] = bi3 = from[3];
295 from += 4;
296 to_next += 4;
297 n_left_from -= 4;
298 n_left_to_next -= 4;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700299
300 b0 = vlib_get_buffer (vm, bi0);
301 b1 = vlib_get_buffer (vm, bi1);
Damjan Mariondc5252b2016-11-24 19:25:01 -0800302 b2 = vlib_get_buffer (vm, bi2);
303 b3 = vlib_get_buffer (vm, bi3);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700304
Dave Barach97d8dc22016-08-15 15:31:15 -0400305 /* RX interface handles */
306 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
307 sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX];
Damjan Mariondc5252b2016-11-24 19:25:01 -0800308 sw_if_index2 = vnet_buffer (b2)->sw_if_index[VLIB_RX];
309 sw_if_index3 = vnet_buffer (b3)->sw_if_index[VLIB_RX];
Ed Warnickecb9cada2015-12-08 15:45:58 -0700310
Damjan Mariondc5252b2016-11-24 19:25:01 -0800311 /* Process 4 x pkts */
Ed Warnickecb9cada2015-12-08 15:45:58 -0700312
Dave Barach97d8dc22016-08-15 15:31:15 -0400313 h0 = vlib_buffer_get_current (b0);
314 h1 = vlib_buffer_get_current (b1);
Damjan Mariondc5252b2016-11-24 19:25:01 -0800315 h2 = vlib_buffer_get_current (b2);
316 h3 = vlib_buffer_get_current (b3);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700317
Dave Barach681abe42017-02-15 09:01:01 -0500318 if (do_trace)
Dave Barach97d8dc22016-08-15 15:31:15 -0400319 {
320 if (b0->flags & VLIB_BUFFER_IS_TRACED)
321 {
322 l2learn_trace_t *t =
323 vlib_add_trace (vm, node, b0, sizeof (*t));
324 t->sw_if_index = sw_if_index0;
325 t->bd_index = vnet_buffer (b0)->l2.bd_index;
326 clib_memcpy (t->src, h0->src_address, 6);
327 clib_memcpy (t->dst, h0->dst_address, 6);
328 }
329 if (b1->flags & VLIB_BUFFER_IS_TRACED)
330 {
331 l2learn_trace_t *t =
332 vlib_add_trace (vm, node, b1, sizeof (*t));
333 t->sw_if_index = sw_if_index1;
334 t->bd_index = vnet_buffer (b1)->l2.bd_index;
335 clib_memcpy (t->src, h1->src_address, 6);
336 clib_memcpy (t->dst, h1->dst_address, 6);
337 }
Damjan Mariondc5252b2016-11-24 19:25:01 -0800338 if (b2->flags & VLIB_BUFFER_IS_TRACED)
339 {
340 l2learn_trace_t *t =
341 vlib_add_trace (vm, node, b2, sizeof (*t));
342 t->sw_if_index = sw_if_index2;
343 t->bd_index = vnet_buffer (b2)->l2.bd_index;
344 clib_memcpy (t->src, h2->src_address, 6);
345 clib_memcpy (t->dst, h2->dst_address, 6);
346 }
347 if (b3->flags & VLIB_BUFFER_IS_TRACED)
348 {
349 l2learn_trace_t *t =
350 vlib_add_trace (vm, node, b3, sizeof (*t));
351 t->sw_if_index = sw_if_index3;
352 t->bd_index = vnet_buffer (b3)->l2.bd_index;
353 clib_memcpy (t->src, h3->src_address, 6);
354 clib_memcpy (t->dst, h3->dst_address, 6);
355 }
Dave Barach97d8dc22016-08-15 15:31:15 -0400356 }
Ed Warnickecb9cada2015-12-08 15:45:58 -0700357
Damjan Mariondc5252b2016-11-24 19:25:01 -0800358 /* process 4 pkts */
359 vlib_node_increment_counter (vm, l2learn_node.index,
360 L2LEARN_ERROR_L2LEARN, 4);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700361
Damjan Mariondc5252b2016-11-24 19:25:01 -0800362 l2fib_lookup_4 (msm->mac_table, &cached_key, &cached_result,
Dave Barach97d8dc22016-08-15 15:31:15 -0400363 h0->src_address,
364 h1->src_address,
Damjan Mariondc5252b2016-11-24 19:25:01 -0800365 h2->src_address,
366 h3->src_address,
Dave Barach97d8dc22016-08-15 15:31:15 -0400367 vnet_buffer (b0)->l2.bd_index,
368 vnet_buffer (b1)->l2.bd_index,
Damjan Mariondc5252b2016-11-24 19:25:01 -0800369 vnet_buffer (b2)->l2.bd_index,
370 vnet_buffer (b3)->l2.bd_index,
371 &key0, &key1, &key2, &key3,
372 &bucket0, &bucket1, &bucket2, &bucket3,
373 &result0, &result1, &result2, &result3);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700374
Dave Barach97d8dc22016-08-15 15:31:15 -0400375 l2learn_process (node, msm, &em->counters[node_counter_base_index],
376 b0, sw_if_index0, &key0, &cached_key,
John Lodbfa5742017-09-02 08:27:36 -0400377 &count, &result0, &next0, timestamp);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700378
Dave Barach97d8dc22016-08-15 15:31:15 -0400379 l2learn_process (node, msm, &em->counters[node_counter_base_index],
380 b1, sw_if_index1, &key1, &cached_key,
John Lodbfa5742017-09-02 08:27:36 -0400381 &count, &result1, &next1, timestamp);
Dave Barach97d8dc22016-08-15 15:31:15 -0400382
Damjan Mariondc5252b2016-11-24 19:25:01 -0800383 l2learn_process (node, msm, &em->counters[node_counter_base_index],
384 b2, sw_if_index2, &key2, &cached_key,
John Lodbfa5742017-09-02 08:27:36 -0400385 &count, &result2, &next2, timestamp);
Damjan Mariondc5252b2016-11-24 19:25:01 -0800386
387 l2learn_process (node, msm, &em->counters[node_counter_base_index],
388 b3, sw_if_index3, &key3, &cached_key,
John Lodbfa5742017-09-02 08:27:36 -0400389 &count, &result3, &next3, timestamp);
Damjan Mariondc5252b2016-11-24 19:25:01 -0800390
Dave Barach97d8dc22016-08-15 15:31:15 -0400391 /* verify speculative enqueues, maybe switch current next frame */
392 /* if next0==next1==next_index then nothing special needs to be done */
Damjan Mariondc5252b2016-11-24 19:25:01 -0800393 vlib_validate_buffer_enqueue_x4 (vm, node, next_index,
Dave Barach97d8dc22016-08-15 15:31:15 -0400394 to_next, n_left_to_next,
Damjan Mariondc5252b2016-11-24 19:25:01 -0800395 bi0, bi1, bi2, bi3,
396 next0, next1, next2, next3);
Dave Barach97d8dc22016-08-15 15:31:15 -0400397 }
398
Ed Warnickecb9cada2015-12-08 15:45:58 -0700399 while (n_left_from > 0 && n_left_to_next > 0)
400 {
Dave Barach97d8dc22016-08-15 15:31:15 -0400401 u32 bi0;
402 vlib_buffer_t *b0;
403 u32 next0;
404 u32 sw_if_index0;
405 ethernet_header_t *h0;
406 l2fib_entry_key_t key0;
407 l2fib_entry_result_t result0;
408 u32 bucket0;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700409
Dave Barach97d8dc22016-08-15 15:31:15 -0400410 /* speculatively enqueue b0 to the current next frame */
Ed Warnickecb9cada2015-12-08 15:45:58 -0700411 bi0 = from[0];
412 to_next[0] = bi0;
413 from += 1;
414 to_next += 1;
415 n_left_from -= 1;
416 n_left_to_next -= 1;
417
418 b0 = vlib_get_buffer (vm, bi0);
419
Dave Barach97d8dc22016-08-15 15:31:15 -0400420 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
Ed Warnickecb9cada2015-12-08 15:45:58 -0700421
Dave Barach97d8dc22016-08-15 15:31:15 -0400422 h0 = vlib_buffer_get_current (b0);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700423
Dave Barach681abe42017-02-15 09:01:01 -0500424 if (do_trace && PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
Dave Barach97d8dc22016-08-15 15:31:15 -0400425 {
426 l2learn_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
427 t->sw_if_index = sw_if_index0;
428 t->bd_index = vnet_buffer (b0)->l2.bd_index;
429 clib_memcpy (t->src, h0->src_address, 6);
430 clib_memcpy (t->dst, h0->dst_address, 6);
431 }
Ed Warnickecb9cada2015-12-08 15:45:58 -0700432
Dave Barach97d8dc22016-08-15 15:31:15 -0400433 /* process 1 pkt */
Damjan Mariondc5252b2016-11-24 19:25:01 -0800434 vlib_node_increment_counter (vm, l2learn_node.index,
435 L2LEARN_ERROR_L2LEARN, 1);
436
Ed Warnickecb9cada2015-12-08 15:45:58 -0700437
Dave Barach97d8dc22016-08-15 15:31:15 -0400438 l2fib_lookup_1 (msm->mac_table, &cached_key, &cached_result,
439 h0->src_address, vnet_buffer (b0)->l2.bd_index,
440 &key0, &bucket0, &result0);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700441
Dave Barach97d8dc22016-08-15 15:31:15 -0400442 l2learn_process (node, msm, &em->counters[node_counter_base_index],
443 b0, sw_if_index0, &key0, &cached_key,
John Lodbfa5742017-09-02 08:27:36 -0400444 &count, &result0, &next0, timestamp);
Dave Barach97d8dc22016-08-15 15:31:15 -0400445
446 /* verify speculative enqueue, maybe switch current next frame */
Ed Warnickecb9cada2015-12-08 15:45:58 -0700447 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
448 to_next, n_left_to_next,
449 bi0, next0);
450 }
451
452 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
453 }
454
455 return frame->n_vectors;
456}
457
Dave Barach681abe42017-02-15 09:01:01 -0500458static uword
459l2learn_node_fn (vlib_main_t * vm,
460 vlib_node_runtime_t * node, vlib_frame_t * frame)
461{
462 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)))
463 return l2learn_node_inline (vm, node, frame, 1 /* do_trace */ );
464 return l2learn_node_inline (vm, node, frame, 0 /* do_trace */ );
465}
Ed Warnickecb9cada2015-12-08 15:45:58 -0700466
Dave Barach97d8dc22016-08-15 15:31:15 -0400467/* *INDENT-OFF* */
Ed Warnickecb9cada2015-12-08 15:45:58 -0700468VLIB_REGISTER_NODE (l2learn_node,static) = {
469 .function = l2learn_node_fn,
470 .name = "l2-learn",
471 .vector_size = sizeof (u32),
472 .format_trace = format_l2learn_trace,
473 .type = VLIB_NODE_TYPE_INTERNAL,
Dave Barach97d8dc22016-08-15 15:31:15 -0400474
Ed Warnickecb9cada2015-12-08 15:45:58 -0700475 .n_errors = ARRAY_LEN(l2learn_error_strings),
476 .error_strings = l2learn_error_strings,
477
478 .n_next_nodes = L2LEARN_N_NEXT,
479
480 /* edit / add dispositions here */
481 .next_nodes = {
482 [L2LEARN_NEXT_DROP] = "error-drop",
483 [L2LEARN_NEXT_L2FWD] = "l2-fwd",
484 },
485};
Dave Barach97d8dc22016-08-15 15:31:15 -0400486/* *INDENT-ON* */
Ed Warnickecb9cada2015-12-08 15:45:58 -0700487
Damjan Marion1c80e832016-05-11 23:07:18 +0200488VLIB_NODE_FUNCTION_MULTIARCH (l2learn_node, l2learn_node_fn)
Dave Barach97d8dc22016-08-15 15:31:15 -0400489 clib_error_t *l2learn_init (vlib_main_t * vm)
Ed Warnickecb9cada2015-12-08 15:45:58 -0700490{
Dave Barach97d8dc22016-08-15 15:31:15 -0400491 l2learn_main_t *mp = &l2learn_main;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700492
Dave Barach97d8dc22016-08-15 15:31:15 -0400493 mp->vlib_main = vm;
494 mp->vnet_main = vnet_get_main ();
495
496 /* Initialize the feature next-node indexes */
497 feat_bitmap_init_next_nodes (vm,
498 l2learn_node.index,
499 L2INPUT_N_FEAT,
500 l2input_get_feat_names (),
501 mp->feat_next_node_index);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700502
503 /* init the hash table ptr */
Dave Barach97d8dc22016-08-15 15:31:15 -0400504 mp->mac_table = get_mac_table ();
Ed Warnickecb9cada2015-12-08 15:45:58 -0700505
Dave Barach97d8dc22016-08-15 15:31:15 -0400506 /*
507 * Set the default number of dynamically learned macs to the number
508 * of buckets.
509 */
John Lo8d00fff2017-08-03 00:35:36 -0400510 mp->global_learn_limit = L2LEARN_DEFAULT_LIMIT;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700511
512 return 0;
513}
514
515VLIB_INIT_FUNCTION (l2learn_init);
516
517
Dave Barach97d8dc22016-08-15 15:31:15 -0400518/**
Chris Luke16bcf7d2016-09-01 14:31:46 -0400519 * Set subinterface learn enable/disable.
Dave Barach97d8dc22016-08-15 15:31:15 -0400520 * The CLI format is:
521 * set interface l2 learn <interface> [disable]
522 */
Ed Warnickecb9cada2015-12-08 15:45:58 -0700523static clib_error_t *
524int_learn (vlib_main_t * vm,
Dave Barach97d8dc22016-08-15 15:31:15 -0400525 unformat_input_t * input, vlib_cli_command_t * cmd)
Ed Warnickecb9cada2015-12-08 15:45:58 -0700526{
Dave Barach97d8dc22016-08-15 15:31:15 -0400527 vnet_main_t *vnm = vnet_get_main ();
528 clib_error_t *error = 0;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700529 u32 sw_if_index;
530 u32 enable;
531
Dave Barach97d8dc22016-08-15 15:31:15 -0400532 if (!unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
Ed Warnickecb9cada2015-12-08 15:45:58 -0700533 {
534 error = clib_error_return (0, "unknown interface `%U'",
Dave Barach97d8dc22016-08-15 15:31:15 -0400535 format_unformat_error, input);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700536 goto done;
537 }
538
539 enable = 1;
Dave Barach97d8dc22016-08-15 15:31:15 -0400540 if (unformat (input, "disable"))
541 {
542 enable = 0;
543 }
Ed Warnickecb9cada2015-12-08 15:45:58 -0700544
Dave Barach97d8dc22016-08-15 15:31:15 -0400545 /* set the interface flag */
546 l2input_intf_bitmap_enable (sw_if_index, L2INPUT_FEAT_LEARN, enable);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700547
Dave Barach97d8dc22016-08-15 15:31:15 -0400548done:
Ed Warnickecb9cada2015-12-08 15:45:58 -0700549 return error;
550}
551
Billy McFall22aa3e92016-09-09 08:46:40 -0400552/*?
553 * Layer 2 learning can be enabled and disabled on each
554 * interface and on each bridge-domain. Use this command to
555 * manage interfaces. It is enabled by default.
556 *
557 * @cliexpar
558 * Example of how to enable learning:
559 * @cliexcmd{set interface l2 learn GigabitEthernet0/8/0}
560 * Example of how to disable learning:
561 * @cliexcmd{set interface l2 learn GigabitEthernet0/8/0 disable}
562?*/
Dave Barach97d8dc22016-08-15 15:31:15 -0400563/* *INDENT-OFF* */
Ed Warnickecb9cada2015-12-08 15:45:58 -0700564VLIB_CLI_COMMAND (int_learn_cli, static) = {
565 .path = "set interface l2 learn",
566 .short_help = "set interface l2 learn <interface> [disable]",
567 .function = int_learn,
568};
Dave Barach97d8dc22016-08-15 15:31:15 -0400569/* *INDENT-ON* */
Ed Warnickecb9cada2015-12-08 15:45:58 -0700570
571
572static clib_error_t *
573l2learn_config (vlib_main_t * vm, unformat_input_t * input)
574{
575 l2learn_main_t *mp = &l2learn_main;
576
577 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
578 {
579 if (unformat (input, "limit %d", &mp->global_learn_limit))
Dave Barach97d8dc22016-08-15 15:31:15 -0400580 ;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700581
582 else
Dave Barach97d8dc22016-08-15 15:31:15 -0400583 return clib_error_return (0, "unknown input `%U'",
584 format_unformat_error, input);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700585 }
586
587 return 0;
588}
589
590VLIB_CONFIG_FUNCTION (l2learn_config, "l2learn");
591
Dave Barach97d8dc22016-08-15 15:31:15 -0400592
593/*
594 * fd.io coding-style-patch-verification: ON
595 *
596 * Local Variables:
597 * eval: (c-set-style "gnu")
598 * End:
599 */