Line data Source code
1 : /*
2 : * Copyright (c) 2015 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 <vlib/vlib.h>
17 : #include <vnet/l2/feat_bitmap.h>
18 : #include <vnet/l2/l2_rw.h>
19 : #include <vnet/classify/vnet_classify.h>
20 :
21 : /**
22 : * @file
23 : * @brief Layer 2 Rewrite.
24 : *
25 : * Layer 2-Rewrite node uses classify tables to match packets. Then, using
26 : * the provisioned mask and value, modifies the packet header.
27 : */
28 :
29 :
30 : #ifndef CLIB_MARCH_VARIANT
31 : l2_rw_main_t l2_rw_main;
32 : #endif /* CLIB_MARCH_VARIANT */
33 :
34 : typedef struct
35 : {
36 : u32 sw_if_index;
37 : u32 classify_table_index;
38 : u32 rewrite_entry_index;
39 : } l2_rw_trace_t;
40 :
41 : static u8 *
42 0 : format_l2_rw_entry (u8 * s, va_list * args)
43 : {
44 0 : l2_rw_entry_t *e = va_arg (*args, l2_rw_entry_t *);
45 0 : l2_rw_main_t *rw = &l2_rw_main;
46 0 : s = format (s, "%d - mask:%U value:%U\n",
47 0 : e - rw->entries,
48 : format_hex_bytes, e->mask,
49 0 : e->rewrite_n_vectors * sizeof (u32x4), format_hex_bytes,
50 0 : e->value, e->rewrite_n_vectors * sizeof (u32x4));
51 : s =
52 0 : format (s, " hits:%d skip_bytes:%d", e->hit_count,
53 0 : e->skip_n_vectors * sizeof (u32x4));
54 0 : return s;
55 : }
56 :
57 : static u8 *
58 0 : format_l2_rw_config (u8 * s, va_list * args)
59 : {
60 0 : l2_rw_config_t *c = va_arg (*args, l2_rw_config_t *);
61 0 : return format (s, "table-index:%d miss-index:%d",
62 : c->table_index, c->miss_index);
63 : }
64 :
65 : /* packet trace format function */
66 : static u8 *
67 0 : format_l2_rw_trace (u8 * s, va_list * args)
68 : {
69 0 : CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
70 0 : CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
71 0 : l2_rw_trace_t *t = va_arg (*args, l2_rw_trace_t *);
72 0 : return format (s, "l2-rw: sw_if_index %d, table %d, entry %d",
73 : t->sw_if_index, t->classify_table_index,
74 : t->rewrite_entry_index);
75 : }
76 :
77 : always_inline l2_rw_config_t *
78 0 : l2_rw_get_config (u32 sw_if_index)
79 : {
80 0 : l2_rw_main_t *rw = &l2_rw_main;
81 0 : if (PREDICT_FALSE (!clib_bitmap_get (rw->configs_bitmap, sw_if_index)))
82 : {
83 0 : vec_validate (rw->configs, sw_if_index);
84 0 : rw->configs[sw_if_index].table_index = ~0;
85 0 : rw->configs[sw_if_index].miss_index = ~0;
86 0 : rw->configs_bitmap =
87 0 : clib_bitmap_set (rw->configs_bitmap, sw_if_index, 1);
88 : }
89 0 : return &rw->configs[sw_if_index];
90 : }
91 :
92 : static_always_inline void
93 0 : l2_rw_rewrite (l2_rw_entry_t * rwe, u8 * h)
94 : {
95 0 : u32x4u *d = ((u32x4u *) h) + rwe->skip_n_vectors;
96 0 : switch (rwe->rewrite_n_vectors)
97 : {
98 0 : case 5:
99 0 : d[4] = (d[4] & ~rwe->mask[4]) | rwe->value[4];
100 : /* FALLTHROUGH */
101 0 : case 4:
102 0 : d[3] = (d[3] & ~rwe->mask[3]) | rwe->value[3];
103 : /* FALLTHROUGH */
104 0 : case 3:
105 0 : d[2] = (d[2] & ~rwe->mask[2]) | rwe->value[2];
106 : /* FALLTHROUGH */
107 0 : case 2:
108 0 : d[1] = (d[1] & ~rwe->mask[1]) | rwe->value[1];
109 : /* FALLTHROUGH */
110 0 : case 1:
111 0 : d[0] = (d[0] & ~rwe->mask[0]) | rwe->value[0];
112 0 : break;
113 0 : default:
114 0 : abort ();
115 : }
116 0 : }
117 :
118 2300 : VLIB_NODE_FN (l2_rw_node) (vlib_main_t * vm,
119 : vlib_node_runtime_t * node, vlib_frame_t * frame)
120 : {
121 0 : l2_rw_main_t *rw = &l2_rw_main;
122 : u32 n_left_from, *from, *to_next, next_index;
123 0 : vnet_classify_main_t *vcm = &vnet_classify_main;
124 0 : f64 now = vlib_time_now (vlib_get_main ());
125 :
126 0 : from = vlib_frame_vector_args (frame);
127 0 : n_left_from = frame->n_vectors; /* number of packets to process */
128 0 : next_index = node->cached_next_index;
129 :
130 0 : while (n_left_from > 0)
131 : {
132 : u32 n_left_to_next;
133 :
134 : /* get space to enqueue frame to graph node "next_index" */
135 0 : vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
136 :
137 0 : while (n_left_from >= 6 && n_left_to_next >= 2)
138 : {
139 : u32 bi0, next0, sw_if_index0, rwe_index0;
140 : u32 bi1, next1, sw_if_index1, rwe_index1;
141 : vlib_buffer_t *b0, *b1;
142 : ethernet_header_t *h0, *h1;
143 : l2_rw_config_t *config0, *config1;
144 : u64 hash0, hash1;
145 : vnet_classify_table_t *t0, *t1;
146 : vnet_classify_entry_t *e0, *e1;
147 : l2_rw_entry_t *rwe0, *rwe1;
148 :
149 : {
150 : vlib_buffer_t *p2, *p3, *p4, *p5;
151 0 : p2 = vlib_get_buffer (vm, from[2]);
152 0 : p3 = vlib_get_buffer (vm, from[3]);
153 0 : p4 = vlib_get_buffer (vm, from[4]);
154 0 : p5 = vlib_get_buffer (vm, from[5]);
155 :
156 0 : vlib_prefetch_buffer_header (p4, LOAD);
157 0 : vlib_prefetch_buffer_header (p5, LOAD);
158 0 : vlib_prefetch_buffer_data (p2, LOAD);
159 0 : vlib_prefetch_buffer_data (p3, LOAD);
160 : }
161 :
162 0 : bi0 = from[0];
163 0 : bi1 = from[1];
164 0 : to_next[0] = bi0;
165 0 : to_next[1] = bi1;
166 0 : from += 2;
167 0 : to_next += 2;
168 0 : n_left_from -= 2;
169 0 : n_left_to_next -= 2;
170 :
171 0 : b0 = vlib_get_buffer (vm, bi0);
172 0 : b1 = vlib_get_buffer (vm, bi1);
173 0 : h0 = vlib_buffer_get_current (b0);
174 0 : h1 = vlib_buffer_get_current (b1);
175 :
176 0 : sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
177 0 : sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX];
178 0 : config0 = l2_rw_get_config (sw_if_index0); /*TODO: check sw_if_index0 value */
179 0 : config1 = l2_rw_get_config (sw_if_index1); /*TODO: check sw_if_index0 value */
180 0 : t0 = pool_elt_at_index (vcm->tables, config0->table_index);
181 0 : t1 = pool_elt_at_index (vcm->tables, config1->table_index);
182 :
183 0 : hash0 = vnet_classify_hash_packet (t0, (u8 *) h0);
184 0 : hash1 = vnet_classify_hash_packet (t1, (u8 *) h1);
185 0 : e0 = vnet_classify_find_entry (t0, (u8 *) h0, hash0, now);
186 0 : e1 = vnet_classify_find_entry (t1, (u8 *) h1, hash1, now);
187 :
188 0 : while (!e0 && (t0->next_table_index != ~0))
189 : {
190 0 : t0 = pool_elt_at_index (vcm->tables, t0->next_table_index);
191 0 : hash0 = vnet_classify_hash_packet (t0, (u8 *) h0);
192 0 : e0 = vnet_classify_find_entry (t0, (u8 *) h0, hash0, now);
193 : }
194 :
195 0 : while (!e1 && (t1->next_table_index != ~0))
196 : {
197 0 : t1 = pool_elt_at_index (vcm->tables, t1->next_table_index);
198 0 : hash1 = vnet_classify_hash_packet (t1, (u8 *) h1);
199 0 : e1 = vnet_classify_find_entry (t1, (u8 *) h1, hash1, now);
200 : }
201 :
202 0 : rwe_index0 = e0 ? e0->opaque_index : config0->miss_index;
203 0 : rwe_index1 = e1 ? e1->opaque_index : config1->miss_index;
204 :
205 0 : if (rwe_index0 != ~0)
206 : {
207 0 : rwe0 = pool_elt_at_index (rw->entries, rwe_index0);
208 0 : l2_rw_rewrite (rwe0, (u8 *) h0);
209 : }
210 0 : if (rwe_index1 != ~0)
211 : {
212 0 : rwe1 = pool_elt_at_index (rw->entries, rwe_index1);
213 0 : l2_rw_rewrite (rwe1, (u8 *) h1);
214 : }
215 :
216 0 : if (PREDICT_FALSE ((b0->flags & VLIB_BUFFER_IS_TRACED)))
217 : {
218 0 : l2_rw_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
219 0 : t->sw_if_index = sw_if_index0;
220 0 : t->classify_table_index = config0->table_index;
221 0 : t->rewrite_entry_index = rwe_index0;
222 : }
223 :
224 0 : if (PREDICT_FALSE ((b1->flags & VLIB_BUFFER_IS_TRACED)))
225 : {
226 0 : l2_rw_trace_t *t = vlib_add_trace (vm, node, b1, sizeof (*t));
227 0 : t->sw_if_index = sw_if_index1;
228 0 : t->classify_table_index = config1->table_index;
229 0 : t->rewrite_entry_index = rwe_index1;
230 : }
231 :
232 : /* Update feature bitmap and get next feature index */
233 0 : next0 = vnet_l2_feature_next (b0, rw->feat_next_node_index,
234 : L2INPUT_FEAT_RW);
235 0 : next1 = vnet_l2_feature_next (b1, rw->feat_next_node_index,
236 : L2INPUT_FEAT_RW);
237 :
238 0 : vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
239 : to_next, n_left_to_next,
240 : bi0, bi1, next0, next1);
241 : }
242 :
243 0 : while (n_left_from > 0 && n_left_to_next > 0)
244 : {
245 : u32 bi0, next0, sw_if_index0, rwe_index0;
246 : vlib_buffer_t *b0;
247 : ethernet_header_t *h0;
248 : l2_rw_config_t *config0;
249 : u64 hash0;
250 : vnet_classify_table_t *t0;
251 : vnet_classify_entry_t *e0;
252 : l2_rw_entry_t *rwe0;
253 :
254 0 : bi0 = from[0];
255 0 : to_next[0] = bi0;
256 0 : from += 1;
257 0 : to_next += 1;
258 0 : n_left_from -= 1;
259 0 : n_left_to_next -= 1;
260 :
261 0 : b0 = vlib_get_buffer (vm, bi0);
262 0 : h0 = vlib_buffer_get_current (b0);
263 :
264 0 : sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
265 0 : config0 = l2_rw_get_config (sw_if_index0); /*TODO: check sw_if_index0 value */
266 0 : t0 = pool_elt_at_index (vcm->tables, config0->table_index);
267 :
268 0 : hash0 = vnet_classify_hash_packet (t0, (u8 *) h0);
269 0 : e0 = vnet_classify_find_entry (t0, (u8 *) h0, hash0, now);
270 :
271 0 : while (!e0 && (t0->next_table_index != ~0))
272 : {
273 0 : t0 = pool_elt_at_index (vcm->tables, t0->next_table_index);
274 0 : hash0 = vnet_classify_hash_packet (t0, (u8 *) h0);
275 0 : e0 = vnet_classify_find_entry (t0, (u8 *) h0, hash0, now);
276 : }
277 :
278 0 : rwe_index0 = e0 ? e0->opaque_index : config0->miss_index;
279 :
280 0 : if (rwe_index0 != ~0)
281 : {
282 0 : rwe0 = pool_elt_at_index (rw->entries, rwe_index0);
283 0 : l2_rw_rewrite (rwe0, (u8 *) h0);
284 : }
285 :
286 0 : if (PREDICT_FALSE ((b0->flags & VLIB_BUFFER_IS_TRACED)))
287 : {
288 0 : l2_rw_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
289 0 : t->sw_if_index = sw_if_index0;
290 0 : t->classify_table_index = config0->table_index;
291 0 : t->rewrite_entry_index = rwe_index0;
292 : }
293 :
294 : /* Update feature bitmap and get next feature index */
295 0 : next0 = vnet_l2_feature_next (b0, rw->feat_next_node_index,
296 : L2INPUT_FEAT_RW);
297 :
298 0 : vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
299 : to_next, n_left_to_next,
300 : bi0, next0);
301 : }
302 0 : vlib_put_next_frame (vm, node, next_index, n_left_to_next);
303 : }
304 :
305 0 : return frame->n_vectors;
306 : }
307 :
308 : #ifndef CLIB_MARCH_VARIANT
309 : int
310 0 : l2_rw_mod_entry (u32 * index,
311 : u8 * mask, u8 * value, u32 len, u32 skip, u8 is_del)
312 : {
313 0 : l2_rw_main_t *rw = &l2_rw_main;
314 0 : l2_rw_entry_t *e = 0;
315 0 : if (*index != ~0)
316 : {
317 0 : if (pool_is_free_index (rw->entries, *index))
318 : {
319 0 : return -1;
320 : }
321 0 : e = pool_elt_at_index (rw->entries, *index);
322 : }
323 : else
324 : {
325 0 : pool_get (rw->entries, e);
326 0 : *index = e - rw->entries;
327 : }
328 :
329 0 : if (is_del)
330 : {
331 0 : pool_put (rw->entries, e);
332 0 : return 0;
333 : }
334 :
335 0 : e->skip_n_vectors = skip / sizeof (u32x4);
336 0 : skip -= e->skip_n_vectors * sizeof (u32x4);
337 0 : e->rewrite_n_vectors = (skip + len - 1) / sizeof (u32x4) + 1;
338 0 : vec_alloc_aligned (e->mask, e->rewrite_n_vectors, sizeof (u32x4));
339 0 : clib_memset (e->mask, 0, e->rewrite_n_vectors * sizeof (u32x4));
340 0 : vec_alloc_aligned (e->value, e->rewrite_n_vectors, sizeof (u32x4));
341 0 : clib_memset (e->value, 0, e->rewrite_n_vectors * sizeof (u32x4));
342 :
343 0 : clib_memcpy (((u8 *) e->value) + skip, value, len);
344 0 : clib_memcpy (((u8 *) e->mask) + skip, mask, len);
345 :
346 : int i;
347 0 : for (i = 0; i < e->rewrite_n_vectors; i++)
348 : {
349 0 : e->value[i] &= e->mask[i];
350 : }
351 :
352 0 : return 0;
353 : }
354 : #endif /* CLIB_MARCH_VARIANT */
355 :
356 : static clib_error_t *
357 0 : l2_rw_entry_cli_fn (vlib_main_t * vm,
358 : unformat_input_t * input, vlib_cli_command_t * cmd)
359 : {
360 0 : u32 index = ~0;
361 0 : u8 *mask = 0;
362 0 : u8 *value = 0;
363 0 : u32 skip = 0;
364 0 : u8 del = 0;
365 :
366 0 : while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
367 : {
368 0 : if (unformat (input, "index %d", &index))
369 : ;
370 0 : else if (unformat (input, "mask %U", unformat_hex_string, &mask))
371 : ;
372 0 : else if (unformat (input, "value %U", unformat_hex_string, &value))
373 : ;
374 0 : else if (unformat (input, "skip %d", &skip))
375 : ;
376 0 : else if (unformat (input, "del"))
377 0 : del = 1;
378 : else
379 0 : break;
380 : }
381 :
382 0 : if (!mask || !value)
383 0 : return clib_error_return (0, "Unspecified mask or value");
384 :
385 0 : if (vec_len (mask) != vec_len (value))
386 0 : return clib_error_return (0, "Mask and value lengths must be identical");
387 :
388 : int ret;
389 0 : if ((ret =
390 0 : l2_rw_mod_entry (&index, mask, value, vec_len (mask), skip, del)))
391 0 : return clib_error_return (0, "Could not add entry");
392 :
393 0 : return 0;
394 : }
395 :
396 : /*?
397 : * Layer 2-Rewrite node uses classify tables to match packets. Then, using
398 : * the provisioned mask and value, modifies the packet header.
399 : *
400 : * @cliexpar
401 : * Example of how to add an l2 rewrite entry to change the destination mac of
402 : * the packet to 00:8a:00:0d:0e:02 (where parameter mask is Ethernet header's
403 : mask,
404 : * parameter value is Ethernet header's value):
405 : * @cliexcmd{l2 rewrite entry mask ffffffffffff00000000000000000000 value
406 : 008a000d0e0200000000000000000000}
407 : ?*/
408 : /* *INDENT-OFF* */
409 285289 : VLIB_CLI_COMMAND (l2_rw_entry_cli, static) = {
410 : .path = "l2 rewrite entry",
411 : .short_help =
412 : "l2 rewrite entry [index <index>] [mask <hex-mask>] [value <hex-value>] [skip <n_bytes>] [del]",
413 : .function = l2_rw_entry_cli_fn,
414 : };
415 : /* *INDENT-ON* */
416 :
417 : #ifndef CLIB_MARCH_VARIANT
418 : int
419 0 : l2_rw_interface_set_table (u32 sw_if_index, u32 table_index, u32 miss_index)
420 : {
421 0 : l2_rw_config_t *c = l2_rw_get_config (sw_if_index);
422 0 : l2_rw_main_t *rw = &l2_rw_main;
423 :
424 0 : c->table_index = table_index;
425 0 : c->miss_index = miss_index;
426 0 : u32 feature_bitmap = (table_index == ~0) ? 0 : L2INPUT_FEAT_RW;
427 :
428 0 : l2input_intf_bitmap_enable (sw_if_index, L2INPUT_FEAT_RW, feature_bitmap);
429 :
430 0 : if (c->table_index == ~0)
431 0 : clib_bitmap_set (rw->configs_bitmap, sw_if_index, 0);
432 :
433 0 : return 0;
434 : }
435 : #endif /* CLIB_MARCH_VARIANT */
436 :
437 : static clib_error_t *
438 0 : l2_rw_interface_cli_fn (vlib_main_t * vm,
439 : unformat_input_t * input, vlib_cli_command_t * cmd)
440 : {
441 0 : vnet_main_t *vnm = vnet_get_main ();
442 0 : u32 table_index = ~0;
443 0 : u32 sw_if_index = ~0;
444 0 : u32 miss_index = ~0;
445 :
446 0 : if (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
447 : {
448 0 : unformat (input, "%U", unformat_vnet_sw_interface, vnm, &sw_if_index);
449 : }
450 :
451 0 : while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
452 : {
453 0 : if (unformat (input, "table %d", &table_index))
454 : ;
455 0 : else if (unformat (input, "miss-index %d", &miss_index))
456 : ;
457 : else
458 0 : break;
459 : }
460 :
461 0 : if (sw_if_index == ~0)
462 0 : return clib_error_return (0,
463 : "You must specify an interface 'iface <interface>'",
464 : format_unformat_error, input);
465 : int ret;
466 0 : if ((ret =
467 0 : l2_rw_interface_set_table (sw_if_index, table_index, miss_index)))
468 0 : return clib_error_return (0, "l2_rw_interface_set_table returned %d",
469 : ret);
470 :
471 0 : return 0;
472 : }
473 :
474 : /*?
475 : * Apply the rule to the interface. The following example shows how to use
476 : classify
477 : * entry and Layer 2-Rewrite entry to modify the packet ethernet header on the
478 : * interface.
479 : *
480 : * @cliexpar
481 : * Example use the classify to filter packets that do not need to be modified
482 : (where
483 : * 192.168.68.34 is the destination ip of the data packet, 8080 is the
484 : destination port
485 : * of the packet):
486 : * @cliexcmd{classify table mask l3 ip4 dst l4 dst_port}
487 : * @cliexcmd{classify session acl-hit-next permit table-index 0 match l3 ip4
488 : dst 192.168.68.34 l4 dst_port 8080}
489 : *
490 : * @cliexpar
491 : * Example apply classify and l2 rewrite rules to the interface (where
492 : YusurK2Eth6/0/1/3
493 : * is interface, \"table 0\" means Table Id is 0, \"miss 0\" means the packet
494 : that matches
495 : * the classify. miss will be modified according to the l2 rewrite entry with
496 : index 0):
497 : * @cliexcmd{set interface l2 rewrite YusurK2Eth6/0/1/3 table 0 miss-index 0}
498 : ?*/
499 : /* *INDENT-OFF* */
500 285289 : VLIB_CLI_COMMAND (l2_rw_interface_cli, static) = {
501 : .path = "set interface l2 rewrite",
502 : .short_help =
503 : "set interface l2 rewrite <interface> [table <table index>] [miss-index <entry-index>]",
504 : .function = l2_rw_interface_cli_fn,
505 : };
506 : /* *INDENT-ON* */
507 :
508 : static clib_error_t *
509 0 : l2_rw_show_interfaces_cli_fn (vlib_main_t * vm,
510 : unformat_input_t * input,
511 : vlib_cli_command_t * cmd)
512 : {
513 0 : l2_rw_main_t *rw = &l2_rw_main;
514 0 : if (clib_bitmap_count_set_bits (rw->configs_bitmap) == 0)
515 0 : vlib_cli_output (vm, "No interface is currently using l2 rewrite\n");
516 :
517 : uword i;
518 : /* *INDENT-OFF* */
519 0 : clib_bitmap_foreach (i, rw->configs_bitmap) {
520 0 : vlib_cli_output (vm, "sw_if_index:%d %U\n", i, format_l2_rw_config, &rw->configs[i]);
521 : }
522 : /* *INDENT-ON* */
523 0 : return 0;
524 : }
525 :
526 : /*?
527 : * This command displays the l2 rewrite entries of the interfaces.
528 : *
529 : * @cliexpar
530 : * Example of how to display the l2 rewrite rules on the interface:
531 : * @cliexstart{show l2 rewrite interfaces}
532 : * sw_if_index:4 table-index:0 miss-index:0
533 : * @cliexend
534 : ?*/
535 : /* *INDENT-OFF* */
536 285289 : VLIB_CLI_COMMAND (l2_rw_show_interfaces_cli, static) = {
537 : .path = "show l2 rewrite interfaces",
538 : .short_help =
539 : "show l2 rewrite interfaces",
540 : .function = l2_rw_show_interfaces_cli_fn,
541 : };
542 : /* *INDENT-ON* */
543 :
544 : static clib_error_t *
545 0 : l2_rw_show_entries_cli_fn (vlib_main_t * vm,
546 : unformat_input_t * input, vlib_cli_command_t * cmd)
547 : {
548 0 : l2_rw_main_t *rw = &l2_rw_main;
549 : l2_rw_entry_t *e;
550 0 : if (pool_elts (rw->entries) == 0)
551 0 : vlib_cli_output (vm, "No entries\n");
552 :
553 : /* *INDENT-OFF* */
554 0 : pool_foreach (e, rw->entries) {
555 0 : vlib_cli_output (vm, "%U\n", format_l2_rw_entry, e);
556 : }
557 : /* *INDENT-ON* */
558 0 : return 0;
559 : }
560 :
561 : /*?
562 : * This command displays all l2 rewrite entries.
563 : *
564 : * @cliexpar
565 : * Example of how to display all l2 rewrite entries:
566 : * @cliexstart{show l2 rewrite entries}
567 : * 0 - mask:ffffffffffff00000000000000000000
568 : value:aabbccddeeff00000000000000000000
569 : * hits:0 skip_bytes:0
570 : * @cliexend
571 : ?*/
572 : /* *INDENT-OFF* */
573 285289 : VLIB_CLI_COMMAND (l2_rw_show_entries_cli, static) = {
574 : .path = "show l2 rewrite entries",
575 : .short_help =
576 : "show l2 rewrite entries",
577 : .function = l2_rw_show_entries_cli_fn,
578 : };
579 : /* *INDENT-ON* */
580 :
581 : static int
582 0 : l2_rw_enable_disable (u32 bridge_domain, u8 disable)
583 : {
584 0 : u32 mask = L2INPUT_FEAT_RW;
585 0 : l2input_set_bridge_features (bridge_domain, mask, disable ? 0 : mask);
586 0 : return 0;
587 : }
588 :
589 : static clib_error_t *
590 0 : l2_rw_set_cli_fn (vlib_main_t * vm,
591 : unformat_input_t * input, vlib_cli_command_t * cmd)
592 : {
593 : u32 bridge_domain;
594 0 : u8 disable = 0;
595 :
596 0 : if (unformat_check_input (input) == UNFORMAT_END_OF_INPUT ||
597 0 : !unformat (input, "%d", &bridge_domain))
598 : {
599 0 : return clib_error_return (0, "You must specify a bridge domain");
600 : }
601 :
602 0 : if (unformat_check_input (input) != UNFORMAT_END_OF_INPUT &&
603 0 : unformat (input, "disable"))
604 : {
605 0 : disable = 1;
606 : }
607 :
608 0 : if (l2_rw_enable_disable (bridge_domain, disable))
609 0 : return clib_error_return (0, "Could not enable or disable rewrite");
610 :
611 0 : return 0;
612 : }
613 :
614 : /*?
615 : * Layer 2 rewrite can be enabled and disabled on each interface and on each
616 : bridge-domain.
617 : * Use this command to manage l2 rewrite on bridge-domain.
618 : *
619 : * @cliexpar
620 : * Example of how to enable rewrite (where 100 is the bridge-domain-id):
621 : * @cliexcmd{set bridge-domain rewrite 100}
622 : * Example of how to disable rewrite (where 100 is the bridge-domain-id):
623 : * @cliexcmd{set bridge-domain rewrite 100 disable}
624 : ?*/
625 : /* *INDENT-OFF* */
626 285289 : VLIB_CLI_COMMAND (l2_rw_set_cli, static) = {
627 : .path = "set bridge-domain rewrite",
628 : .short_help =
629 : "set bridge-domain rewrite <bridge-domain> [disable]",
630 : .function = l2_rw_set_cli_fn,
631 : };
632 : /* *INDENT-ON* */
633 :
634 : static clib_error_t *
635 575 : l2_rw_init (vlib_main_t * vm)
636 : {
637 575 : l2_rw_main_t *rw = &l2_rw_main;
638 575 : rw->configs = 0;
639 575 : rw->entries = 0;
640 575 : clib_bitmap_alloc (rw->configs_bitmap, 1);
641 575 : feat_bitmap_init_next_nodes (vm,
642 : l2_rw_node.index,
643 : L2INPUT_N_FEAT,
644 : l2input_get_feat_names (),
645 575 : rw->feat_next_node_index);
646 575 : return 0;
647 : }
648 :
649 24191 : VLIB_INIT_FUNCTION (l2_rw_init);
650 :
651 : enum
652 : {
653 : L2_RW_NEXT_DROP,
654 : L2_RW_N_NEXT,
655 : };
656 :
657 : #define foreach_l2_rw_error \
658 : _(UNKNOWN, "Unknown error")
659 :
660 : typedef enum
661 : {
662 : #define _(sym,str) L2_RW_ERROR_##sym,
663 : foreach_l2_rw_error
664 : #undef _
665 : L2_RW_N_ERROR,
666 : } l2_rw_error_t;
667 :
668 : static char *l2_rw_error_strings[] = {
669 : #define _(sym,string) string,
670 : foreach_l2_rw_error
671 : #undef _
672 : };
673 :
674 : /* *INDENT-OFF* */
675 183788 : VLIB_REGISTER_NODE (l2_rw_node) = {
676 : .name = "l2-rw",
677 : .vector_size = sizeof (u32),
678 : .format_trace = format_l2_rw_trace,
679 : .type = VLIB_NODE_TYPE_INTERNAL,
680 : .n_errors = ARRAY_LEN(l2_rw_error_strings),
681 : .error_strings = l2_rw_error_strings,
682 : .runtime_data_bytes = 0,
683 : .n_next_nodes = L2_RW_N_NEXT,
684 : .next_nodes = { [L2_RW_NEXT_DROP] = "error-drop"},
685 : };
686 : /* *INDENT-ON* */
687 :
688 : /*
689 : * fd.io coding-style-patch-verification: ON
690 : *
691 : * Local Variables:
692 : * eval: (c-set-style "gnu")
693 : * End:
694 : */
|
