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Vector Packet Processing
interface.c
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1 /*
2  * gre_interface.c: gre interfaces
3  *
4  * Copyright (c) 2012 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 <vnet/vnet.h>
19 #include <vnet/pg/pg.h>
20 #include <vnet/gre/gre.h>
21 #include <vnet/ip/format.h>
22 #include <vnet/fib/ip4_fib.h>
23 #include <vnet/fib/ip6_fib.h>
24 #include <vnet/adj/adj_midchain.h>
25 #include <vnet/adj/adj_nbr.h>
26 #include <vnet/mpls/mpls.h>
27 
29 
30 static u8 *
31 format_gre_tunnel (u8 * s, va_list * args)
32 {
33  gre_tunnel_t *t = va_arg (*args, gre_tunnel_t *);
34 
35  s = format (s, "[%d] instance %d src %U dst %U fib-idx %d sw-if-idx %d ",
40 
41  s = format (s, "payload %s ", gre_tunnel_type_names[t->type]);
42 
43  if (t->type == GRE_TUNNEL_TYPE_ERSPAN)
44  s = format (s, "session %d ", t->session_id);
45 
46  if (t->type != GRE_TUNNEL_TYPE_L3)
47  s = format (s, "l2-adj-idx %d ", t->l2_adj_index);
48 
49  return s;
50 }
51 
52 static gre_tunnel_t *
54  u32 outer_fib_index, gre_tunnel_key_t * key)
55 {
56  gre_main_t *gm = &gre_main;
57  uword *p;
58 
59  if (!a->is_ipv6)
60  {
61  gre_mk_key4 (a->src.ip4, a->dst.ip4, outer_fib_index,
62  a->tunnel_type, a->session_id, &key->gtk_v4);
63  p = hash_get_mem (gm->tunnel_by_key4, &key->gtk_v4);
64  }
65  else
66  {
67  gre_mk_key6 (&a->src.ip6, &a->dst.ip6, outer_fib_index,
68  a->tunnel_type, a->session_id, &key->gtk_v6);
69  p = hash_get_mem (gm->tunnel_by_key6, &key->gtk_v6);
70  }
71 
72  if (NULL == p)
73  return (NULL);
74 
75  return (pool_elt_at_index (gm->tunnels, p[0]));
76 }
77 
78 static void
80 {
81  gre_main_t *gm = &gre_main;
82 
83  t->key = clib_mem_alloc (sizeof (*t->key));
84  clib_memcpy (t->key, key, sizeof (*key));
85 
87  {
89  }
90  else
91  {
93  }
94 }
95 
96 static void
98 {
99  gre_main_t *gm = &gre_main;
100 
102  {
104  }
105  else
106  {
108  }
109 
110  clib_mem_free (t->key);
111  t->key = NULL;
112 }
113 
114 static gre_tunnel_t *
116 {
118  return ((gre_tunnel_t *) (((char *) node) -
119  STRUCT_OFFSET_OF (gre_tunnel_t, node)));
120 }
121 
122 /**
123  * gre_tunnel_stack
124  *
125  * 'stack' (resolve the recursion for) the tunnel's midchain adjacency
126  */
127 void
129 {
130  gre_main_t *gm = &gre_main;
131  ip_adjacency_t *adj;
132  gre_tunnel_t *gt;
133  u32 sw_if_index;
134 
135  adj = adj_get (ai);
136  sw_if_index = adj->rewrite_header.sw_if_index;
137 
138  if ((vec_len (gm->tunnel_index_by_sw_if_index) < sw_if_index) ||
139  (~0 == gm->tunnel_index_by_sw_if_index[sw_if_index]))
140  return;
141 
142  gt = pool_elt_at_index (gm->tunnels,
143  gm->tunnel_index_by_sw_if_index[sw_if_index]);
144 
147  {
149  return;
150  }
151 
152  dpo_id_t tmp = DPO_INVALID;
155 
157  if (DPO_LOAD_BALANCE == tmp.dpoi_type)
158  {
159  /*
160  * post GRE rewrite we will load-balance. However, the GRE encap
161  * is always the same for this adjacency/tunnel and hence the IP/GRE
162  * src,dst hash is always the same result too. So we do that hash now and
163  * stack on the choice.
164  * If the choice is an incomplete adj then we will need a poke when
165  * it becomes complete. This happens since the adj update walk propagates
166  * as far a recursive paths.
167  */
168  const dpo_id_t *choice;
169  load_balance_t *lb;
170  int hash;
171 
172  lb = load_balance_get (tmp.dpoi_index);
173 
174  if (fib_fwd == FIB_FORW_CHAIN_TYPE_UNICAST_IP4)
176  lb->lb_hash_config);
177  else
179  lb->lb_hash_config);
180  choice =
182  dpo_copy (&tmp, choice);
183  }
184 
185  adj_nbr_midchain_stack (ai, &tmp);
186  dpo_reset (&tmp);
187 }
188 
189 /**
190  * @brief Call back when restacking all adjacencies on a GRE interface
191  */
192 static adj_walk_rc_t
194 {
195  gre_tunnel_stack (ai);
196 
197  return (ADJ_WALK_RC_CONTINUE);
198 }
199 
200 static void
202 {
203  fib_protocol_t proto;
204 
205  /*
206  * walk all the adjacencies on th GRE interface and restack them
207  */
209  {
211  }
212 }
213 
214 /**
215  * Function definition to backwalk a FIB node
216  */
219 {
221 
223 }
224 
225 /**
226  * Function definition to get a FIB node from its index
227  */
228 static fib_node_t *
230 {
231  gre_tunnel_t *gt;
232  gre_main_t *gm;
233 
234  gm = &gre_main;
235  gt = pool_elt_at_index (gm->tunnels, index);
236 
237  return (&gt->node);
238 }
239 
240 /**
241  * Function definition to inform the FIB node that its last lock has gone.
242  */
243 static void
245 {
246  /*
247  * The MPLS GRE tunnel is a root of the graph. As such
248  * it never has children and thus is never locked.
249  */
250  ASSERT (0);
251 }
252 
253 /*
254  * Virtual function table registered by MPLS GRE tunnels
255  * for participation in the FIB object graph.
256  */
257 const static fib_node_vft_t gre_vft = {
259  .fnv_last_lock = gre_tunnel_last_lock_gone,
260  .fnv_back_walk = gre_tunnel_back_walk,
261 };
262 
263 static int
265  u32 outer_fib_index, u32 * sw_if_indexp)
266 {
267  gre_main_t *gm = &gre_main;
268  vnet_main_t *vnm = gm->vnet_main;
269  ip4_main_t *im4 = &ip4_main;
270  ip6_main_t *im6 = &ip6_main;
271  gre_tunnel_t *t;
273  u32 hw_if_index, sw_if_index;
274  clib_error_t *error;
275  u8 is_ipv6 = a->is_ipv6;
276  gre_tunnel_key_t key;
277 
278  t = gre_tunnel_db_find (a, outer_fib_index, &key);
279  if (NULL != t)
280  return VNET_API_ERROR_IF_ALREADY_EXISTS;
281 
283  memset (t, 0, sizeof (*t));
284 
285  /* Reconcile the real dev_instance and a possible requested instance */
286  u32 t_idx = t - gm->tunnels; /* tunnel index (or instance) */
287  u32 u_idx = a->instance; /* user specified instance */
288  if (u_idx == ~0)
289  u_idx = t_idx;
290  if (hash_get (gm->instance_used, u_idx))
291  {
292  pool_put (gm->tunnels, t);
293  return VNET_API_ERROR_INSTANCE_IN_USE;
294  }
295  hash_set (gm->instance_used, u_idx, 1);
296 
297  t->dev_instance = t_idx; /* actual */
298  t->user_instance = u_idx; /* name */
300 
301  t->type = a->tunnel_type;
302  if (t->type == GRE_TUNNEL_TYPE_ERSPAN)
303  t->session_id = a->session_id;
304 
305  if (t->type == GRE_TUNNEL_TYPE_L3)
306  hw_if_index = vnet_register_interface (vnm, gre_device_class.index, t_idx,
308  t_idx);
309  else
310  {
311  /* Default MAC address (d00b:eed0:0000 + sw_if_index) */
312  u8 address[6] =
313  { 0xd0, 0x0b, 0xee, 0xd0, (u8) (t_idx >> 8), (u8) t_idx };
314  error =
316  address, &hw_if_index, 0);
317  if (error)
318  {
319  clib_error_report (error);
320  return VNET_API_ERROR_INVALID_REGISTRATION;
321  }
322  }
323 
324  /* Set GRE tunnel interface output node (not used for L3 payload) */
325  vnet_set_interface_output_node (vnm, hw_if_index, gre_encap_node.index);
326 
327  hi = vnet_get_hw_interface (vnm, hw_if_index);
328  sw_if_index = hi->sw_if_index;
329 
330  t->hw_if_index = hw_if_index;
331  t->outer_fib_index = outer_fib_index;
332  t->sw_if_index = sw_if_index;
334 
336  gm->tunnel_index_by_sw_if_index[sw_if_index] = t_idx;
337 
338  if (!is_ipv6)
339  {
340  vec_validate (im4->fib_index_by_sw_if_index, sw_if_index);
341  hi->min_packet_bytes =
342  64 + sizeof (gre_header_t) + sizeof (ip4_header_t);
343  }
344  else
345  {
346  vec_validate (im6->fib_index_by_sw_if_index, sw_if_index);
347  hi->min_packet_bytes =
348  64 + sizeof (gre_header_t) + sizeof (ip6_header_t);
349  }
350 
352  /* preamble */ 8 + /* inter frame gap */ 12;
353 
354  /* Standard default gre MTU. */
356 
357  /*
358  * source the FIB entry for the tunnel's destination
359  * and become a child thereof. The tunnel will then get poked
360  * when the forwarding for the entry updates, and the tunnel can
361  * re-stack accordingly
362  */
363 
364  clib_memcpy (&t->tunnel_src, &a->src, sizeof (t->tunnel_src));
365  t->tunnel_dst.fp_len = !is_ipv6 ? 32 : 128;
367  t->tunnel_dst.fp_addr = a->dst;
368 
369  gre_tunnel_db_add (t, &key);
370  if (t->type == GRE_TUNNEL_TYPE_ERSPAN)
371  {
372  gre_sn_key_t skey;
373  gre_sn_t *gre_sn;
374 
375  gre_mk_sn_key (t, &skey);
376  gre_sn = (gre_sn_t *) hash_get_mem (gm->seq_num_by_key, &skey);
377  if (gre_sn != NULL)
378  {
379  gre_sn->ref_count++;
380  t->gre_sn = gre_sn;
381  }
382  else
383  {
384  gre_sn = clib_mem_alloc (sizeof (gre_sn_t));
385  gre_sn->seq_num = 0;
386  gre_sn->ref_count = 1;
387  t->gre_sn = gre_sn;
388  hash_set_mem_alloc (&gm->seq_num_by_key, &skey, (uword) gre_sn);
389  }
390  }
391 
393  (outer_fib_index, &t->tunnel_dst, FIB_SOURCE_RR, FIB_ENTRY_FLAG_NONE);
396 
397  if (t->type != GRE_TUNNEL_TYPE_L3)
398  {
400  (t->tunnel_dst.fp_proto, VNET_LINK_ETHERNET, &zero_addr, sw_if_index);
402  }
403 
404  if (sw_if_indexp)
405  *sw_if_indexp = sw_if_index;
406 
407  return 0;
408 }
409 
410 static int
412  u32 outer_fib_index, u32 * sw_if_indexp)
413 {
414  gre_main_t *gm = &gre_main;
415  vnet_main_t *vnm = gm->vnet_main;
416  gre_tunnel_t *t;
417  gre_tunnel_key_t key;
418  u32 sw_if_index;
419 
420  t = gre_tunnel_db_find (a, outer_fib_index, &key);
421  if (NULL == t)
422  return VNET_API_ERROR_NO_SUCH_ENTRY;
423 
424  sw_if_index = t->sw_if_index;
425  vnet_sw_interface_set_flags (vnm, sw_if_index, 0 /* down */ );
426 
427  /* make sure tunnel is removed from l2 bd or xconnect */
428  set_int_l2_mode (gm->vlib_main, vnm, MODE_L3, sw_if_index, 0, 0, 0, 0);
429  gm->tunnel_index_by_sw_if_index[sw_if_index] = ~0;
430 
431  if (t->type == GRE_TUNNEL_TYPE_L3)
433  else
435 
438 
441 
442  ASSERT ((t->type != GRE_TUNNEL_TYPE_ERSPAN) || (t->gre_sn != NULL));
443  if ((t->type == GRE_TUNNEL_TYPE_ERSPAN) && (t->gre_sn->ref_count-- == 1))
444  {
445  gre_sn_key_t skey;
446  gre_mk_sn_key (t, &skey);
447  hash_unset_mem_free (&gm->seq_num_by_key, &skey);
448  clib_mem_free (t->gre_sn);
449  }
450 
453  fib_node_deinit (&t->node);
454  pool_put (gm->tunnels, t);
455 
456  if (sw_if_indexp)
457  *sw_if_indexp = sw_if_index;
458 
459  return 0;
460 }
461 
462 int
464  u32 * sw_if_indexp)
465 {
466  u32 outer_fib_index;
467 
468  if (!a->is_ipv6)
469  outer_fib_index = ip4_fib_index_from_table_id (a->outer_fib_id);
470  else
471  outer_fib_index = ip6_fib_index_from_table_id (a->outer_fib_id);
472 
473  if (~0 == outer_fib_index)
474  return VNET_API_ERROR_NO_SUCH_FIB;
475 
477  return VNET_API_ERROR_INVALID_SESSION_ID;
478 
479  if (a->is_add)
480  return (vnet_gre_tunnel_add (a, outer_fib_index, sw_if_indexp));
481  else
482  return (vnet_gre_tunnel_delete (a, outer_fib_index, sw_if_indexp));
483 }
484 
485 clib_error_t *
487 {
488  gre_main_t *gm = &gre_main;
490  gre_tunnel_t *t;
491  u32 ti;
492 
493  hi = vnet_get_hw_interface (vnm, hw_if_index);
494 
495  if (NULL == gm->tunnel_index_by_sw_if_index ||
497  return (NULL);
498 
500 
501  if (~0 == ti)
502  /* not one of ours */
503  return (NULL);
504 
505  t = pool_elt_at_index (gm->tunnels, ti);
506 
508  vnet_hw_interface_set_flags (vnm, hw_if_index,
510  else
511  vnet_hw_interface_set_flags (vnm, hw_if_index, 0 /* down */ );
512 
513  gre_tunnel_restack (t);
514 
515  return /* no error */ 0;
516 }
517 
518 static clib_error_t *
520  unformat_input_t * input,
521  vlib_cli_command_t * cmd)
522 {
523  unformat_input_t _line_input, *line_input = &_line_input;
525  ip46_address_t src, dst;
526  u32 instance = ~0;
527  u32 outer_fib_id = 0;
529  u32 session_id = 0;
530  int rv;
531  u32 num_m_args = 0;
532  u8 is_add = 1;
533  u32 sw_if_index;
534  clib_error_t *error = NULL;
535  u8 ipv4_set = 0;
536  u8 ipv6_set = 0;
537 
538  /* Get a line of input. */
539  if (!unformat_user (input, unformat_line_input, line_input))
540  return 0;
541 
542  while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
543  {
544  if (unformat (line_input, "del"))
545  is_add = 0;
546  else if (unformat (line_input, "instance %d", &instance))
547  ;
548  else
549  if (unformat (line_input, "src %U", unformat_ip4_address, &src.ip4))
550  {
551  num_m_args++;
552  ipv4_set = 1;
553  }
554  else
555  if (unformat (line_input, "dst %U", unformat_ip4_address, &dst.ip4))
556  {
557  num_m_args++;
558  ipv4_set = 1;
559  }
560  else
561  if (unformat (line_input, "src %U", unformat_ip6_address, &src.ip6))
562  {
563  num_m_args++;
564  ipv6_set = 1;
565  }
566  else
567  if (unformat (line_input, "dst %U", unformat_ip6_address, &dst.ip6))
568  {
569  num_m_args++;
570  ipv6_set = 1;
571  }
572  else if (unformat (line_input, "outer-fib-id %d", &outer_fib_id))
573  ;
574  else if (unformat (line_input, "teb"))
575  t_type = GRE_TUNNEL_TYPE_TEB;
576  else if (unformat (line_input, "erspan %d", &session_id))
577  t_type = GRE_TUNNEL_TYPE_ERSPAN;
578  else
579  {
580  error = clib_error_return (0, "unknown input `%U'",
581  format_unformat_error, line_input);
582  goto done;
583  }
584  }
585 
586  if (num_m_args < 2)
587  {
588  error = clib_error_return (0, "mandatory argument(s) missing");
589  goto done;
590  }
591 
592  if ((ipv4_set && memcmp (&src.ip4, &dst.ip4, sizeof (src.ip4)) == 0) ||
593  (ipv6_set && memcmp (&src.ip6, &dst.ip6, sizeof (src.ip6)) == 0))
594  {
595  error = clib_error_return (0, "src and dst are identical");
596  goto done;
597  }
598 
599  if (ipv4_set && ipv6_set)
600  return clib_error_return (0, "both IPv4 and IPv6 addresses specified");
601 
602  if ((ipv4_set && memcmp (&dst.ip4, &zero_addr.ip4, sizeof (dst.ip4)) == 0)
603  || (ipv6_set
604  && memcmp (&dst.ip6, &zero_addr.ip6, sizeof (dst.ip6)) == 0))
605  {
606  error = clib_error_return (0, "dst address cannot be zero");
607  goto done;
608  }
609 
610  memset (a, 0, sizeof (*a));
611  a->is_add = is_add;
612  a->outer_fib_id = outer_fib_id;
613  a->tunnel_type = t_type;
614  a->session_id = session_id;
615  a->is_ipv6 = ipv6_set;
616  a->instance = instance;
617  if (!ipv6_set)
618  {
619  clib_memcpy (&a->src.ip4, &src.ip4, sizeof (src.ip4));
620  clib_memcpy (&a->dst.ip4, &dst.ip4, sizeof (dst.ip4));
621  }
622  else
623  {
624  clib_memcpy (&a->src.ip6, &src.ip6, sizeof (src.ip6));
625  clib_memcpy (&a->dst.ip6, &dst.ip6, sizeof (dst.ip6));
626  }
627 
628  rv = vnet_gre_add_del_tunnel (a, &sw_if_index);
629 
630  switch (rv)
631  {
632  case 0:
634  vnet_get_main (), sw_if_index);
635  break;
636  case VNET_API_ERROR_IF_ALREADY_EXISTS:
637  error = clib_error_return (0, "GRE tunnel already exists...");
638  goto done;
639  case VNET_API_ERROR_NO_SUCH_FIB:
640  error = clib_error_return (0, "outer fib ID %d doesn't exist\n",
641  outer_fib_id);
642  goto done;
643  case VNET_API_ERROR_NO_SUCH_ENTRY:
644  error = clib_error_return (0, "GRE tunnel doesn't exist");
645  goto done;
646  case VNET_API_ERROR_INVALID_SESSION_ID:
647  error = clib_error_return (0, "session ID %d out of range\n",
648  session_id);
649  goto done;
650  case VNET_API_ERROR_INSTANCE_IN_USE:
651  error = clib_error_return (0, "Instance is in use");
652  goto done;
653  default:
654  error =
655  clib_error_return (0, "vnet_gre_add_del_tunnel returned %d", rv);
656  goto done;
657  }
658 
659 done:
660  unformat_free (line_input);
661 
662  return error;
663 }
664 
665 /* *INDENT-OFF* */
666 VLIB_CLI_COMMAND (create_gre_tunnel_command, static) = {
667  .path = "create gre tunnel",
668  .short_help = "create gre tunnel src <addr> dst <addr> [instance <n>] "
669  "[outer-fib-id <fib>] [teb | erspan <session-id>] [del]",
670  .function = create_gre_tunnel_command_fn,
671 };
672 /* *INDENT-ON* */
673 
674 static clib_error_t *
676  unformat_input_t * input,
677  vlib_cli_command_t * cmd)
678 {
679  gre_main_t *gm = &gre_main;
680  gre_tunnel_t *t;
681  u32 ti = ~0;
682 
683  if (pool_elts (gm->tunnels) == 0)
684  vlib_cli_output (vm, "No GRE tunnels configured...");
685 
687  {
688  if (unformat (input, "%d", &ti))
689  ;
690  else
691  break;
692  }
693 
694  if (~0 == ti)
695  {
696  /* *INDENT-OFF* */
697  pool_foreach (t, gm->tunnels,
698  ({
699  vlib_cli_output (vm, "%U", format_gre_tunnel, t);
700  }));
701  /* *INDENT-ON* */
702  }
703  else
704  {
705  t = pool_elt_at_index (gm->tunnels, ti);
706 
707  vlib_cli_output (vm, "%U", format_gre_tunnel, t);
708  }
709 
710  return 0;
711 }
712 
713 /* *INDENT-OFF* */
714 VLIB_CLI_COMMAND (show_gre_tunnel_command, static) = {
715  .path = "show gre tunnel",
716  .function = show_gre_tunnel_command_fn,
717 };
718 /* *INDENT-ON* */
719 
720 /* force inclusion from application's main.c */
721 clib_error_t *
723 {
725 
726  return 0;
727 }
728 
730 
731 /*
732  * fd.io coding-style-patch-verification: ON
733  *
734  * Local Variables:
735  * eval: (c-set-style "gnu")
736  * End:
737  */
vnet_main_t * vnet_main
Definition: gre.h:298
#define vec_validate(V, I)
Make sure vector is long enough for given index (no header, unspecified alignment) ...
Definition: vec.h:434
void vnet_set_interface_output_node(vnet_main_t *vnm, u32 hw_if_index, u32 node_index)
Set interface output node - for interface registered without its output/tx nodes created because its ...
fib_protocol_t fp_proto
protocol type
Definition: fib_types.h:197
uword * seq_num_by_key
Hash mapping tunnel src/dst addr and fib-idx to sequence number.
Definition: gre.h:285
void gre_tunnel_stack(adj_index_t ai)
gre_tunnel_stack
Definition: interface.c:128
vmrglw vmrglh hi
static void gre_tunnel_db_add(gre_tunnel_t *t, gre_tunnel_key_t *key)
Definition: interface.c:79
Recursive resolution source.
Definition: fib_entry.h:121
Contribute an object that is to be used to forward IP6 packets.
Definition: fib_types.h:103
#define hash_set(h, key, value)
Definition: hash.h:254
uword * tunnel_by_key6
Hash mapping to tunnels with ipv6 src/dst addr.
Definition: gre.h:280
GRE related global data.
Definition: gre.h:255
fib_node_index_t fib_entry_index
The FIB entry sourced by the tunnel for its destination prefix.
Definition: gre.h:213
u32 hw_if_index
Definition: gre.h:206
clib_error_t * vnet_hw_interface_set_flags(vnet_main_t *vnm, u32 hw_if_index, u32 flags)
Definition: interface.c:554
#define hash_unset(h, key)
Definition: hash.h:260
a
Definition: bitmap.h:516
Transparent Ethernet Bridging - the tunnel is in L2 mode.
Definition: gre.h:50
static u8 * format_gre_tunnel(u8 *s, va_list *args)
Definition: interface.c:31
vnet_main_t * vnet_get_main(void)
Definition: misc.c:47
void fib_node_init(fib_node_t *node, fib_node_type_t type)
Definition: fib_node.c:185
u32 fib_entry_child_add(fib_node_index_t fib_entry_index, fib_node_type_t child_type, fib_node_index_t child_index)
Definition: fib_entry.c:527
const u8 * adj_get_rewrite(adj_index_t ai)
Return the rewrite string of the adjacency.
Definition: adj.c:439
static void gre_tunnel_restack(gre_tunnel_t *gt)
Definition: interface.c:201
#define NULL
Definition: clib.h:55
static u32 ip4_compute_flow_hash(const ip4_header_t *ip, flow_hash_config_t flow_hash_config)
Definition: ip4.h:287
IP unicast adjacency.
Definition: adj.h:175
enum fib_node_back_walk_rc_t_ fib_node_back_walk_rc_t
Return code from a back walk function.
void fib_entry_contribute_forwarding(fib_node_index_t fib_entry_index, fib_forward_chain_type_t fct, dpo_id_t *dpo)
Definition: fib_entry.c:419
flow_hash_config_t lb_hash_config
the hash config to use when selecting a bucket.
Definition: load_balance.h:134
static vnet_hw_interface_t * vnet_get_hw_interface(vnet_main_t *vnm, u32 hw_if_index)
u32 outer_fib_index
The FIB in which the src.dst address are present.
Definition: gre.h:205
void fib_entry_child_remove(fib_node_index_t fib_entry_index, u32 sibling_index)
Definition: fib_entry.c:538
void dpo_copy(dpo_id_t *dst, const dpo_id_t *src)
atomic copy a data-plane object.
Definition: dpo.c:261
static adj_walk_rc_t gre_adj_walk_cb(adj_index_t ai, void *ctx)
Call back when restacking all adjacencies on a GRE interface.
Definition: interface.c:193
uword unformat_user(unformat_input_t *input, unformat_function_t *func,...)
Definition: unformat.c:983
format_function_t format_ip46_address
Definition: format.h:61
Contribute an object that is to be used to forward IP4 packets.
Definition: fib_types.h:99
#define hash_set_mem(h, key, value)
Definition: hash.h:274
#define STRUCT_OFFSET_OF(t, f)
Definition: clib.h:62
void fib_node_deinit(fib_node_t *node)
Definition: fib_node.c:197
u32 * fib_index_by_sw_if_index
Table index indexed by software interface.
Definition: ip4.h:111
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:419
#define VNET_HW_INTERFACE_FLAG_LINK_UP
Definition: interface.h:390
format_function_t format_vnet_sw_if_index_name
enum fib_protocol_t_ fib_protocol_t
Protocol Type.
u32 * tunnel_index_by_sw_if_index
Mapping from sw_if_index to tunnel index.
Definition: gre.h:290
void fib_node_register_type(fib_node_type_t type, const fib_node_vft_t *vft)
fib_node_register_type
Definition: fib_node.c:60
u32 seq_num
Definition: gre.h:159
static void gre_tunnel_db_remove(gre_tunnel_t *t)
Definition: interface.c:97
u32 sibling_index
The tunnel is a child of the FIB entry for its desintion.
Definition: gre.h:221
Hash key for GRE header seq number generation for ERSPAN encap.
Definition: gre.h:166
enum gre_tunnel_type_t_ gre_tunnel_type_t
The GRE tunnel type.
static ip_adjacency_t * adj_get(adj_index_t adj_index)
Get a pointer to an adjacency object from its index.
Definition: adj.h:376
u32 sw_if_index
Definition: gre.h:207
#define pool_foreach(VAR, POOL, BODY)
Iterate through pool.
Definition: pool.h:440
unformat_function_t unformat_ip4_address
Definition: format.h:76
u32 dev_instance
Definition: gre.h:242
#define VLIB_INIT_FUNCTION(x)
Definition: init.h:111
static int vnet_gre_tunnel_add(vnet_gre_add_del_tunnel_args_t *a, u32 outer_fib_index, u32 *sw_if_indexp)
Definition: interface.c:264
u16 lb_n_buckets_minus_1
number of buckets in the load-balance - 1.
Definition: load_balance.h:99
enum adj_walk_rc_t_ adj_walk_rc_t
return codes from a adjacency walker callback function
clib_error_t * gre_interface_init(vlib_main_t *vm)
Definition: interface.c:722
#define clib_error_return(e, args...)
Definition: error.h:99
void adj_unlock(adj_index_t adj_index)
Release a reference counting lock on the adjacency.
Definition: adj.c:240
static fib_node_t * gre_tunnel_fib_node_get(fib_node_index_t index)
Function definition to get a FIB node from its index.
Definition: interface.c:229
adj_index_t l2_adj_index
an L2 tunnel always rquires an L2 midchain.
Definition: gre.h:226
u16 fp_len
The mask length.
Definition: fib_types.h:192
ip46_address_t tunnel_src
The tunnel&#39;s source/local address.
Definition: gre.h:197
u32 vnet_register_interface(vnet_main_t *vnm, u32 dev_class_index, u32 dev_instance, u32 hw_class_index, u32 hw_instance)
Definition: interface.c:705
#define GRE_TUNNEL_TYPE_NAMES
Definition: gre.h:62
u32 set_int_l2_mode(vlib_main_t *vm, vnet_main_t *vnet_main, u32 mode, u32 sw_if_index, u32 bd_index, u32 bvi, u32 shg, u32 xc_sw_if_index)
Set the subinterface to run in l2 or l3 mode.
Definition: l2_input.c:550
Definition: fib_entry.h:270
unformat_function_t unformat_line_input
Definition: format.h:281
static clib_error_t * create_gre_tunnel_command_fn(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
Definition: interface.c:519
The identity of a DPO is a combination of its type and its instance number/index of objects of that t...
Definition: dpo.h:168
#define hash_get(h, key)
Definition: hash.h:248
uword * tunnel_by_key4
Hash mapping to tunnels with ipv4 src/dst addr.
Definition: gre.h:275
#define ADJ_INDEX_INVALID
Invalid ADJ index - used when no adj is known likewise blazoned capitals INVALID speak volumes where ...
Definition: adj_types.h:36
#define pool_elt_at_index(p, i)
Returns pointer to element at given index.
Definition: pool.h:461
A representation of a GRE tunnel.
Definition: gre.h:176
#define hash_unset_mem(h, key)
Definition: hash.h:290
vlib_node_registration_t gre_encap_node
(constructor) VLIB_REGISTER_NODE (gre_encap_node)
Definition: gre.c:511
uword * instance_used
Definition: gre.h:301
static uword vnet_hw_interface_get_flags(vnet_main_t *vnm, u32 hw_if_index)
ip46_address_t fp_addr
The address type is not deriveable from the fp_addr member.
Definition: fib_types.h:211
dpo_type_t dpoi_type
the type
Definition: dpo.h:172
static const dpo_id_t * load_balance_get_bucket_i(const load_balance_t *lb, u32 bucket)
Definition: load_balance.h:209
static u32 ip6_fib_index_from_table_id(u32 table_id)
Definition: ip6_fib.h:173
struct _unformat_input_t unformat_input_t
static gre_tunnel_t * gre_tunnel_from_fib_node(fib_node_t *node)
Definition: interface.c:115
load-balancing over a choice of [un]equal cost paths
Definition: dpo.h:102
static u32 ip6_compute_flow_hash(const ip6_header_t *ip, flow_hash_config_t flow_hash_config)
Definition: ip6.h:428
#define pool_put(P, E)
Free an object E in pool P.
Definition: pool.h:273
gre_tunnel_key4_t gtk_v4
Definition: gre.h:150
void gre_update_adj(vnet_main_t *vnm, u32 sw_if_index, adj_index_t ai)
Definition: gre.c:300
The FIB DPO provieds;.
Definition: load_balance.h:84
fib_node_type_t fn_type
The node&#39;s type.
Definition: fib_node.h:290
An node in the FIB graph.
Definition: fib_node.h:286
#define GTK_SESSION_ID_MAX
Definition: gre.h:143
clib_error_t * gre_interface_admin_up_down(vnet_main_t *vnm, u32 hw_if_index, u32 flags)
Definition: interface.c:486
unformat_function_t unformat_ip6_address
Definition: format.h:94
#define pool_get_aligned(P, E, A)
Allocate an object E from a pool P (general version).
Definition: pool.h:188
static clib_error_t * show_gre_tunnel_command_fn(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
Definition: interface.c:675
fib_node_index_t fib_table_entry_special_add(u32 fib_index, const fib_prefix_t *prefix, fib_source_t source, fib_entry_flag_t flags)
Add a &#39;special&#39; entry to the FIB.
Definition: fib_table.c:380
gre_tunnel_type_t type
Definition: gre.h:208
#define UNFORMAT_END_OF_INPUT
Definition: format.h:143
vlib_main_t * vm
Definition: buffer.c:294
void fib_table_entry_delete_index(fib_node_index_t fib_entry_index, fib_source_t source)
Delete a FIB entry.
Definition: fib_table.c:869
gre_sn_t * gre_sn
GRE header sequence number (SN) used for ERSPAN type 2 header, must be bumped automically to be threa...
Definition: gre.h:239
gre_tunnel_key6_t gtk_v6
Definition: gre.h:151
fib_node_get_t fnv_get
Definition: fib_node.h:274
#define clib_memcpy(a, b, c)
Definition: string.h:75
static void gre_mk_key4(ip4_address_t src, ip4_address_t dst, u32 fib_index, u8 ttype, u16 session_id, gre_tunnel_key4_t *key)
Definition: gre.h:380
Used for GRE header seq number generation for ERSPAN encap.
Definition: gre.h:157
u32 fib_node_index_t
A typedef of a node index.
Definition: fib_types.h:30
static u32 ip4_fib_index_from_table_id(u32 table_id)
Definition: ip4_fib.h:149
u32 adj_index_t
An index for adjacencies.
Definition: adj_types.h:30
void adj_nbr_walk(u32 sw_if_index, fib_protocol_t adj_nh_proto, adj_walk_cb_t cb, void *ctx)
Walk the neighbour Adjacencies on a given interface.
Definition: adj_nbr.c:567
static gre_tunnel_t * gre_tunnel_db_find(const vnet_gre_add_del_tunnel_args_t *a, u32 outer_fib_index, gre_tunnel_key_t *key)
Definition: interface.c:53
Context passed between object during a back walk.
Definition: fib_node.h:199
#define VLIB_CLI_COMMAND(x,...)
Definition: cli.h:154
void ethernet_delete_interface(vnet_main_t *vnm, u32 hw_if_index)
Definition: interface.c:321
#define VNET_SW_INTERFACE_FLAG_ADMIN_UP
Definition: interface.h:588
u32 max_l3_packet_bytes[VLIB_N_RX_TX]
Definition: interface.h:480
#define ASSERT(truth)
static fib_node_back_walk_rc_t gre_tunnel_back_walk(fib_node_t *node, fib_node_back_walk_ctx_t *ctx)
Function definition to backwalk a FIB node.
Definition: interface.c:218
void adj_nbr_midchain_stack(adj_index_t adj_index, const dpo_id_t *next)
adj_nbr_midchain_stack
Definition: adj_midchain.c:570
unsigned int u32
Definition: types.h:88
ip6_main_t ip6_main
Definition: ip6_forward.c:2750
long ctx[MAX_CONNS]
Definition: main.c:126
clib_error_t * ethernet_register_interface(vnet_main_t *vnm, u32 dev_class_index, u32 dev_instance, u8 *address, u32 *hw_if_index_return, ethernet_flag_change_function_t flag_change)
Definition: interface.c:273
static load_balance_t * load_balance_get(index_t lbi)
Definition: load_balance.h:200
gre_tunnel_t * tunnels
pool of tunnel instances
Definition: gre.h:260
IPv4 main type.
Definition: ip4.h:95
static void clib_mem_free(void *p)
Definition: mem.h:179
enum fib_forward_chain_type_t_ fib_forward_chain_type_t
FIB output chain type.
#define clib_error_report(e)
Definition: error.h:113
void adj_nbr_midchain_unstack(adj_index_t adj_index)
adj_nbr_midchain_unstack
Definition: adj_midchain.c:548
Union of the two possible key types.
Definition: gre.h:148
static void * clib_mem_alloc(uword size)
Definition: mem.h:112
vnet_hw_interface_class_t gre_hw_interface_class
u32 user_instance
Definition: gre.h:243
static void gre_mk_key6(const ip6_address_t *src, const ip6_address_t *dst, u32 fib_index, u8 ttype, u16 session_id, gre_tunnel_key6_t *key)
Definition: gre.h:399
void vnet_delete_hw_interface(vnet_main_t *vnm, u32 hw_if_index)
Definition: interface.c:917
u64 uword
Definition: types.h:112
fib_node_t node
Linkage into the FIB object graph.
Definition: gre.h:186
fib_protocol_t ia_nh_proto
The protocol of the neighbor/peer.
Definition: adj.h:203
Definition: defs.h:47
vnet_device_class_t gre_device_class
index_t dpoi_index
the index of objects of that type
Definition: dpo.h:184
ERSPAN type 2 - the tunnel is for port mirror SPAN output.
Definition: gre.h:57
#define vec_len(v)
Number of elements in vector (rvalue-only, NULL tolerant)
L3 GRE (i.e.
Definition: gre.h:46
unsigned char u8
Definition: types.h:56
u32 ref_count
Definition: gre.h:160
static void unformat_free(unformat_input_t *i)
Definition: format.h:161
static void hash_set_mem_alloc(uword **h, void *key, uword v)
Definition: hash.h:278
#define DPO_INVALID
An initialiser for DPOs declared on the stack.
Definition: dpo.h:195
#define FOR_EACH_FIB_IP_PROTOCOL(_item)
Definition: fib_types.h:70
#define hash_get_mem(h, key)
Definition: hash.h:268
static void hash_unset_mem_free(uword **h, void *key)
Definition: hash.h:294
A FIB graph nodes virtual function table.
Definition: fib_node.h:273
static int vnet_gre_tunnel_delete(vnet_gre_add_del_tunnel_args_t *a, u32 outer_fib_index, u32 *sw_if_indexp)
Definition: interface.c:411
u8 * format_unformat_error(u8 *s, va_list *va)
Definition: unformat.c:91
gre_tunnel_key_t * key
The hash table&#39;s key stored in separate memory since the tunnel_t memory can realloc.
Definition: gre.h:192
ip46_address_t dst
Definition: gre.h:371
ip4_main_t ip4_main
Global ip4 main structure.
Definition: ip4_forward.c:818
fib_prefix_t tunnel_dst
The tunnel&#39;s destination/remote address.
Definition: gre.h:201
adj_index_t adj_nbr_add_or_lock(fib_protocol_t nh_proto, vnet_link_t link_type, const ip46_address_t *nh_addr, u32 sw_if_index)
Neighbour Adjacency sub-type.
Definition: adj_nbr.c:214
void dpo_reset(dpo_id_t *dpo)
reset a DPO ID The DPO will be unlocked.
Definition: dpo.c:231
clib_error_t * vnet_sw_interface_set_flags(vnet_main_t *vnm, u32 sw_if_index, u32 flags)
Definition: interface.c:562
vlib_main_t * vlib_main
Definition: gre.h:297
u32 per_packet_overhead_bytes
Definition: interface.h:477
u32 flags
Definition: vhost-user.h:77
#define vec_validate_init_empty(V, I, INIT)
Make sure vector is long enough for given index and initialize empty space (no header, unspecified alignment)
Definition: vec.h:483
#define CLIB_CACHE_LINE_BYTES
Definition: cache.h:59
void vlib_cli_output(vlib_main_t *vm, char *fmt,...)
Definition: cli.c:680
int vnet_gre_add_del_tunnel(vnet_gre_add_del_tunnel_args_t *a, u32 *sw_if_indexp)
Definition: interface.c:463
u32 * fib_index_by_sw_if_index
Definition: ip6.h:176
gre_main_t gre_main
Definition: gre.c:22
u16 session_id
ERSPAN type 2 session ID, least significant 10 bits of u16.
Definition: gre.h:231
static void gre_mk_sn_key(const gre_tunnel_t *gt, gre_sn_key_t *key)
Definition: gre.h:421
ip46_address_t src
Definition: gre.h:371
static const char * gre_tunnel_type_names[]
Definition: interface.c:28
const ip46_address_t zero_addr
Definition: lookup.c:318
uword unformat(unformat_input_t *i, const char *fmt,...)
Definition: unformat.c:972
Definition: defs.h:46
static uword unformat_check_input(unformat_input_t *i)
Definition: format.h:169
#define MODE_L3
Definition: l2_input.h:202
static void gre_tunnel_last_lock_gone(fib_node_t *node)
Function definition to inform the FIB node that its last lock has gone.
Definition: interface.c:244
static uword pool_elts(void *v)
Number of active elements in a pool.
Definition: pool.h:128