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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 #include <vnet/l2/l2_input.h>
28 
30 
31 static u8 *
32 format_gre_tunnel (u8 * s, va_list * args)
33 {
34  gre_tunnel_t *t = va_arg (*args, gre_tunnel_t *);
35 
36  s = format (s, "[%d] instance %d src %U dst %U fib-idx %d sw-if-idx %d ",
41 
42  s = format (s, "payload %s ", gre_tunnel_type_names[t->type]);
43 
44  if (t->type == GRE_TUNNEL_TYPE_ERSPAN)
45  s = format (s, "session %d ", t->session_id);
46 
47  if (t->type != GRE_TUNNEL_TYPE_L3)
48  s = format (s, "l2-adj-idx %d ", t->l2_adj_index);
49 
50  return s;
51 }
52 
53 static gre_tunnel_t *
55  u32 outer_fib_index, gre_tunnel_key_t * key)
56 {
58  uword *p;
59 
60  if (!a->is_ipv6)
61  {
62  gre_mk_key4 (a->src.ip4, a->dst.ip4, outer_fib_index,
63  a->tunnel_type, a->session_id, &key->gtk_v4);
64  p = hash_get_mem (gm->tunnel_by_key4, &key->gtk_v4);
65  }
66  else
67  {
68  gre_mk_key6 (&a->src.ip6, &a->dst.ip6, outer_fib_index,
69  a->tunnel_type, a->session_id, &key->gtk_v6);
70  p = hash_get_mem (gm->tunnel_by_key6, &key->gtk_v6);
71  }
72 
73  if (NULL == p)
74  return (NULL);
75 
76  return (pool_elt_at_index (gm->tunnels, p[0]));
77 }
78 
79 static void
81 {
83 
84  t->key = clib_mem_alloc (sizeof (*t->key));
85  clib_memcpy (t->key, key, sizeof (*key));
86 
88  {
90  }
91  else
92  {
94  }
95 }
96 
97 static void
99 {
100  gre_main_t *gm = &gre_main;
101 
103  {
105  }
106  else
107  {
109  }
110 
111  clib_mem_free (t->key);
112  t->key = NULL;
113 }
114 
115 static gre_tunnel_t *
117 {
119  return ((gre_tunnel_t *) (((char *) node) -
120  STRUCT_OFFSET_OF (gre_tunnel_t, node)));
121 }
122 
123 /**
124  * gre_tunnel_stack
125  *
126  * 'stack' (resolve the recursion for) the tunnel's midchain adjacency
127  */
128 void
130 {
131  fib_forward_chain_type_t fib_fwd;
132  gre_main_t *gm = &gre_main;
133  dpo_id_t tmp = DPO_INVALID;
134  ip_adjacency_t *adj;
135  gre_tunnel_t *gt;
137 
138  adj = adj_get (ai);
139  sw_if_index = adj->rewrite_header.sw_if_index;
140 
141  if ((vec_len (gm->tunnel_index_by_sw_if_index) <= sw_if_index) ||
142  (~0 == gm->tunnel_index_by_sw_if_index[sw_if_index]))
143  return;
144 
145  gt = pool_elt_at_index (gm->tunnels,
146  gm->tunnel_index_by_sw_if_index[sw_if_index]);
147 
150  {
152  return;
153  }
154 
156 
158  if (DPO_LOAD_BALANCE == tmp.dpoi_type)
159  {
160  /*
161  * post GRE rewrite we will load-balance. However, the GRE encap
162  * is always the same for this adjacency/tunnel and hence the IP/GRE
163  * src,dst hash is always the same result too. So we do that hash now and
164  * stack on the choice.
165  * If the choice is an incomplete adj then we will need a poke when
166  * it becomes complete. This happens since the adj update walk propagates
167  * as far a recursive paths.
168  */
169  const dpo_id_t *choice;
170  load_balance_t *lb;
171  int hash;
172 
173  lb = load_balance_get (tmp.dpoi_index);
174 
175  if (fib_fwd == FIB_FORW_CHAIN_TYPE_UNICAST_IP4)
177  lb->lb_hash_config);
178  else
180  lb->lb_hash_config);
181  choice =
183  dpo_copy (&tmp, choice);
184  }
185 
186  adj_nbr_midchain_stack (ai, &tmp);
187  dpo_reset (&tmp);
188 }
189 
190 /**
191  * @brief Call back when restacking all adjacencies on a GRE interface
192  */
193 static adj_walk_rc_t
195 {
196  gre_tunnel_stack (ai);
197 
198  return (ADJ_WALK_RC_CONTINUE);
199 }
200 
201 static void
203 {
204  fib_protocol_t proto;
205 
206  /*
207  * walk all the adjacencies on th GRE interface and restack them
208  */
210  {
212  }
213 }
214 
215 /**
216  * Function definition to backwalk a FIB node
217  */
220 {
222 
224 }
225 
226 /**
227  * Function definition to get a FIB node from its index
228  */
229 static fib_node_t *
231 {
232  gre_tunnel_t *gt;
233  gre_main_t *gm;
234 
235  gm = &gre_main;
236  gt = pool_elt_at_index (gm->tunnels, index);
237 
238  return (&gt->node);
239 }
240 
241 /**
242  * Function definition to inform the FIB node that its last lock has gone.
243  */
244 static void
246 {
247  /*
248  * The MPLS GRE tunnel is a root of the graph. As such
249  * it never has children and thus is never locked.
250  */
251  ASSERT (0);
252 }
253 
254 /*
255  * Virtual function table registered by MPLS GRE tunnels
256  * for participation in the FIB object graph.
257  */
258 const static fib_node_vft_t gre_vft = {
260  .fnv_last_lock = gre_tunnel_last_lock_gone,
261  .fnv_back_walk = gre_tunnel_back_walk,
262 };
263 
264 static int
266  u32 outer_fib_index, u32 * sw_if_indexp)
267 {
268  gre_main_t *gm = &gre_main;
269  vnet_main_t *vnm = gm->vnet_main;
270  ip4_main_t *im4 = &ip4_main;
271  ip6_main_t *im6 = &ip6_main;
272  gre_tunnel_t *t;
274  u32 hw_if_index, sw_if_index;
275  clib_error_t *error;
276  u8 is_ipv6 = a->is_ipv6;
277  gre_tunnel_key_t key;
278 
279  t = gre_tunnel_db_find (a, outer_fib_index, &key);
280  if (NULL != t)
281  return VNET_API_ERROR_IF_ALREADY_EXISTS;
282 
284  memset (t, 0, sizeof (*t));
285 
286  /* Reconcile the real dev_instance and a possible requested instance */
287  u32 t_idx = t - gm->tunnels; /* tunnel index (or instance) */
288  u32 u_idx = a->instance; /* user specified instance */
289  if (u_idx == ~0)
290  u_idx = t_idx;
291  if (hash_get (gm->instance_used, u_idx))
292  {
293  pool_put (gm->tunnels, t);
294  return VNET_API_ERROR_INSTANCE_IN_USE;
295  }
296  hash_set (gm->instance_used, u_idx, 1);
297 
298  t->dev_instance = t_idx; /* actual */
299  t->user_instance = u_idx; /* name */
301 
302  t->type = a->tunnel_type;
303  if (t->type == GRE_TUNNEL_TYPE_ERSPAN)
304  t->session_id = a->session_id;
305 
306  if (t->type == GRE_TUNNEL_TYPE_L3)
307  hw_if_index = vnet_register_interface (vnm, gre_device_class.index, t_idx,
309  t_idx);
310  else
311  {
312  /* Default MAC address (d00b:eed0:0000 + sw_if_index) */
313  u8 address[6] =
314  { 0xd0, 0x0b, 0xee, 0xd0, (u8) (t_idx >> 8), (u8) t_idx };
315  error =
317  address, &hw_if_index, 0);
318  if (error)
319  {
320  clib_error_report (error);
321  return VNET_API_ERROR_INVALID_REGISTRATION;
322  }
323  }
324 
325  /* Set GRE tunnel interface output node (not used for L3 payload) */
326  vnet_set_interface_output_node (vnm, hw_if_index, gre_encap_node.index);
327 
328  hi = vnet_get_hw_interface (vnm, hw_if_index);
329  sw_if_index = hi->sw_if_index;
330 
331  t->hw_if_index = hw_if_index;
332  t->outer_fib_index = outer_fib_index;
335 
338 
339  if (!is_ipv6)
340  {
341  vec_validate (im4->fib_index_by_sw_if_index, sw_if_index);
342  hi->min_packet_bytes =
343  64 + sizeof (gre_header_t) + sizeof (ip4_header_t);
344  }
345  else
346  {
347  vec_validate (im6->fib_index_by_sw_if_index, sw_if_index);
348  hi->min_packet_bytes =
349  64 + sizeof (gre_header_t) + sizeof (ip6_header_t);
350  }
351 
352  /* Standard default gre MTU. */
353  vnet_sw_interface_set_mtu (vnm, sw_if_index, 9000);
354 
355  /*
356  * source the FIB entry for the tunnel's destination
357  * and become a child thereof. The tunnel will then get poked
358  * when the forwarding for the entry updates, and the tunnel can
359  * re-stack accordingly
360  */
361 
362  clib_memcpy (&t->tunnel_src, &a->src, sizeof (t->tunnel_src));
363  t->tunnel_dst.fp_len = !is_ipv6 ? 32 : 128;
365  t->tunnel_dst.fp_addr = a->dst;
366 
367  gre_tunnel_db_add (t, &key);
368  if (t->type == GRE_TUNNEL_TYPE_ERSPAN)
369  {
370  gre_sn_key_t skey;
371  gre_sn_t *gre_sn;
372 
373  gre_mk_sn_key (t, &skey);
374  gre_sn = (gre_sn_t *) hash_get_mem (gm->seq_num_by_key, &skey);
375  if (gre_sn != NULL)
376  {
377  gre_sn->ref_count++;
378  t->gre_sn = gre_sn;
379  }
380  else
381  {
382  gre_sn = clib_mem_alloc (sizeof (gre_sn_t));
383  gre_sn->seq_num = 0;
384  gre_sn->ref_count = 1;
385  t->gre_sn = gre_sn;
386  hash_set_mem_alloc (&gm->seq_num_by_key, &skey, (uword) gre_sn);
387  }
388  }
389 
391  (outer_fib_index, &t->tunnel_dst, FIB_SOURCE_RR, FIB_ENTRY_FLAG_NONE);
394 
395  if (t->type != GRE_TUNNEL_TYPE_L3)
396  {
398  (t->tunnel_dst.fp_proto, VNET_LINK_ETHERNET, &zero_addr, sw_if_index);
400  }
401 
402  if (sw_if_indexp)
403  *sw_if_indexp = sw_if_index;
404 
405  return 0;
406 }
407 
408 static int
410  u32 outer_fib_index, u32 * sw_if_indexp)
411 {
412  gre_main_t *gm = &gre_main;
413  vnet_main_t *vnm = gm->vnet_main;
414  gre_tunnel_t *t;
415  gre_tunnel_key_t key;
417 
418  t = gre_tunnel_db_find (a, outer_fib_index, &key);
419  if (NULL == t)
420  return VNET_API_ERROR_NO_SUCH_ENTRY;
421 
422  sw_if_index = t->sw_if_index;
423  vnet_sw_interface_set_flags (vnm, sw_if_index, 0 /* down */ );
424 
425  /* make sure tunnel is removed from l2 bd or xconnect */
426  set_int_l2_mode (gm->vlib_main, vnm, MODE_L3, sw_if_index, 0,
427  L2_BD_PORT_TYPE_NORMAL, 0, 0);
429 
430  if (t->type == GRE_TUNNEL_TYPE_L3)
432  else
434 
437 
440 
441  ASSERT ((t->type != GRE_TUNNEL_TYPE_ERSPAN) || (t->gre_sn != NULL));
442  if ((t->type == GRE_TUNNEL_TYPE_ERSPAN) && (t->gre_sn->ref_count-- == 1))
443  {
444  gre_sn_key_t skey;
445  gre_mk_sn_key (t, &skey);
446  hash_unset_mem_free (&gm->seq_num_by_key, &skey);
447  clib_mem_free (t->gre_sn);
448  }
449 
452  fib_node_deinit (&t->node);
453  pool_put (gm->tunnels, t);
454 
455  if (sw_if_indexp)
456  *sw_if_indexp = sw_if_index;
457 
458  return 0;
459 }
460 
461 int
463  u32 * sw_if_indexp)
464 {
465  u32 outer_fib_index;
466 
467  if (!a->is_ipv6)
468  outer_fib_index = ip4_fib_index_from_table_id (a->outer_fib_id);
469  else
470  outer_fib_index = ip6_fib_index_from_table_id (a->outer_fib_id);
471 
472  if (~0 == outer_fib_index)
473  return VNET_API_ERROR_NO_SUCH_FIB;
474 
476  return VNET_API_ERROR_INVALID_SESSION_ID;
477 
478  if (a->is_add)
479  return (vnet_gre_tunnel_add (a, outer_fib_index, sw_if_indexp));
480  else
481  return (vnet_gre_tunnel_delete (a, outer_fib_index, sw_if_indexp));
482 }
483 
484 clib_error_t *
486 {
487  gre_main_t *gm = &gre_main;
489  gre_tunnel_t *t;
490  u32 ti;
491 
492  hi = vnet_get_hw_interface (vnm, hw_if_index);
493 
494  if (NULL == gm->tunnel_index_by_sw_if_index ||
496  return (NULL);
497 
499 
500  if (~0 == ti)
501  /* not one of ours */
502  return (NULL);
503 
504  t = pool_elt_at_index (gm->tunnels, ti);
505 
507  vnet_hw_interface_set_flags (vnm, hw_if_index,
509  else
510  vnet_hw_interface_set_flags (vnm, hw_if_index, 0 /* down */ );
511 
512  gre_tunnel_restack (t);
513 
514  return /* no error */ 0;
515 }
516 
517 static clib_error_t *
519  unformat_input_t * input,
520  vlib_cli_command_t * cmd)
521 {
522  unformat_input_t _line_input, *line_input = &_line_input;
524  ip46_address_t src, dst;
525  u32 instance = ~0;
526  u32 outer_fib_id = 0;
528  u32 session_id = 0;
529  int rv;
530  u32 num_m_args = 0;
531  u8 is_add = 1;
533  clib_error_t *error = NULL;
534  u8 ipv4_set = 0;
535  u8 ipv6_set = 0;
536 
537  /* Get a line of input. */
538  if (!unformat_user (input, unformat_line_input, line_input))
539  return 0;
540 
541  while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
542  {
543  if (unformat (line_input, "del"))
544  is_add = 0;
545  else if (unformat (line_input, "instance %d", &instance))
546  ;
547  else
548  if (unformat (line_input, "src %U", unformat_ip4_address, &src.ip4))
549  {
550  num_m_args++;
551  ipv4_set = 1;
552  }
553  else
554  if (unformat (line_input, "dst %U", unformat_ip4_address, &dst.ip4))
555  {
556  num_m_args++;
557  ipv4_set = 1;
558  }
559  else
560  if (unformat (line_input, "src %U", unformat_ip6_address, &src.ip6))
561  {
562  num_m_args++;
563  ipv6_set = 1;
564  }
565  else
566  if (unformat (line_input, "dst %U", unformat_ip6_address, &dst.ip6))
567  {
568  num_m_args++;
569  ipv6_set = 1;
570  }
571  else if (unformat (line_input, "outer-fib-id %d", &outer_fib_id))
572  ;
573  else if (unformat (line_input, "teb"))
574  t_type = GRE_TUNNEL_TYPE_TEB;
575  else if (unformat (line_input, "erspan %d", &session_id))
576  t_type = GRE_TUNNEL_TYPE_ERSPAN;
577  else
578  {
579  error = clib_error_return (0, "unknown input `%U'",
580  format_unformat_error, line_input);
581  goto done;
582  }
583  }
584 
585  if (num_m_args < 2)
586  {
587  error = clib_error_return (0, "mandatory argument(s) missing");
588  goto done;
589  }
590 
591  if ((ipv4_set && memcmp (&src.ip4, &dst.ip4, sizeof (src.ip4)) == 0) ||
592  (ipv6_set && memcmp (&src.ip6, &dst.ip6, sizeof (src.ip6)) == 0))
593  {
594  error = clib_error_return (0, "src and dst are identical");
595  goto done;
596  }
597 
598  if (ipv4_set && ipv6_set)
599  return clib_error_return (0, "both IPv4 and IPv6 addresses specified");
600 
601  if ((ipv4_set && memcmp (&dst.ip4, &zero_addr.ip4, sizeof (dst.ip4)) == 0)
602  || (ipv6_set
603  && memcmp (&dst.ip6, &zero_addr.ip6, sizeof (dst.ip6)) == 0))
604  {
605  error = clib_error_return (0, "dst address cannot be zero");
606  goto done;
607  }
608 
609  memset (a, 0, sizeof (*a));
610  a->is_add = is_add;
611  a->outer_fib_id = outer_fib_id;
612  a->tunnel_type = t_type;
613  a->session_id = session_id;
614  a->is_ipv6 = ipv6_set;
615  a->instance = instance;
616  if (!ipv6_set)
617  {
618  clib_memcpy (&a->src.ip4, &src.ip4, sizeof (src.ip4));
619  clib_memcpy (&a->dst.ip4, &dst.ip4, sizeof (dst.ip4));
620  }
621  else
622  {
623  clib_memcpy (&a->src.ip6, &src.ip6, sizeof (src.ip6));
624  clib_memcpy (&a->dst.ip6, &dst.ip6, sizeof (dst.ip6));
625  }
626 
627  rv = vnet_gre_add_del_tunnel (a, &sw_if_index);
628 
629  switch (rv)
630  {
631  case 0:
633  vnet_get_main (), sw_if_index);
634  break;
635  case VNET_API_ERROR_IF_ALREADY_EXISTS:
636  error = clib_error_return (0, "GRE tunnel already exists...");
637  goto done;
638  case VNET_API_ERROR_NO_SUCH_FIB:
639  error = clib_error_return (0, "outer fib ID %d doesn't exist\n",
640  outer_fib_id);
641  goto done;
642  case VNET_API_ERROR_NO_SUCH_ENTRY:
643  error = clib_error_return (0, "GRE tunnel doesn't exist");
644  goto done;
645  case VNET_API_ERROR_INVALID_SESSION_ID:
646  error = clib_error_return (0, "session ID %d out of range\n",
647  session_id);
648  goto done;
649  case VNET_API_ERROR_INSTANCE_IN_USE:
650  error = clib_error_return (0, "Instance is in use");
651  goto done;
652  default:
653  error =
654  clib_error_return (0, "vnet_gre_add_del_tunnel returned %d", rv);
655  goto done;
656  }
657 
658 done:
659  unformat_free (line_input);
660 
661  return error;
662 }
663 
664 /* *INDENT-OFF* */
665 VLIB_CLI_COMMAND (create_gre_tunnel_command, static) = {
666  .path = "create gre tunnel",
667  .short_help = "create gre tunnel src <addr> dst <addr> [instance <n>] "
668  "[outer-fib-id <fib>] [teb | erspan <session-id>] [del]",
669  .function = create_gre_tunnel_command_fn,
670 };
671 /* *INDENT-ON* */
672 
673 static clib_error_t *
675  unformat_input_t * input,
676  vlib_cli_command_t * cmd)
677 {
678  gre_main_t *gm = &gre_main;
679  gre_tunnel_t *t;
680  u32 ti = ~0;
681 
682  if (pool_elts (gm->tunnels) == 0)
683  vlib_cli_output (vm, "No GRE tunnels configured...");
684 
686  {
687  if (unformat (input, "%d", &ti))
688  ;
689  else
690  break;
691  }
692 
693  if (~0 == ti)
694  {
695  /* *INDENT-OFF* */
696  pool_foreach (t, gm->tunnels,
697  ({
698  vlib_cli_output (vm, "%U", format_gre_tunnel, t);
699  }));
700  /* *INDENT-ON* */
701  }
702  else
703  {
704  t = pool_elt_at_index (gm->tunnels, ti);
705 
706  vlib_cli_output (vm, "%U", format_gre_tunnel, t);
707  }
708 
709  return 0;
710 }
711 
712 /* *INDENT-OFF* */
713 VLIB_CLI_COMMAND (show_gre_tunnel_command, static) = {
714  .path = "show gre tunnel",
715  .function = show_gre_tunnel_command_fn,
716 };
717 /* *INDENT-ON* */
718 
719 /* force inclusion from application's main.c */
720 clib_error_t *
722 {
724 
725  return 0;
726 }
727 
729 
730 /*
731  * fd.io coding-style-patch-verification: ON
732  *
733  * Local Variables:
734  * eval: (c-set-style "gnu")
735  * End:
736  */
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:437
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:212
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:129
vmrglw vmrglh hi
static void gre_tunnel_db_add(gre_tunnel_t *t, gre_tunnel_key_t *key)
Definition: interface.c:80
typedef address
Definition: ip_types.api:35
Recursive resolution source.
Definition: fib_entry.h:125
#define hash_set(h, key, value)
Definition: hash.h:255
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
vl_api_address_t src
Definition: vxlan_gbp.api:33
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:469
#define hash_unset(h, key)
Definition: hash.h:261
a
Definition: bitmap.h:538
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:32
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:436
static void gre_tunnel_restack(gre_tunnel_t *gt)
Definition: interface.c:202
#define NULL
Definition: clib.h:57
static u32 ip4_compute_flow_hash(const ip4_header_t *ip, flow_hash_config_t flow_hash_config)
Definition: ip4.h:296
IP unicast adjacency.
Definition: adj.h:185
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:194
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:109
#define hash_set_mem(h, key, value)
Definition: hash.h:275
#define STRUCT_OFFSET_OF(t, f)
Definition: clib.h:64
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:112
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:419
#define VNET_HW_INTERFACE_FLAG_LINK_UP
Definition: interface.h:494
format_function_t format_vnet_sw_if_index_name
unsigned char u8
Definition: types.h:56
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:98
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:380
u32 sw_if_index
Definition: gre.h:207
memset(h->entries, 0, sizeof(h->entries[0])*entries)
#define pool_foreach(VAR, POOL, BODY)
Iterate through pool.
Definition: pool.h:443
unformat_function_t unformat_ip4_address
Definition: format.h:70
u32 dev_instance
Definition: gre.h:242
#define VLIB_INIT_FUNCTION(x)
Definition: init.h:163
u32 sw_if_index
Definition: vxlan_gbp.api:39
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:265
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:721
#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:252
unsigned int u32
Definition: types.h:88
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:230
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:207
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:703
#define GRE_TUNNEL_TYPE_NAMES
Definition: gre.h:62
Definition: fib_entry.h:275
unformat_function_t unformat_line_input
Definition: format.h:282
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:518
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:249
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:464
A representation of a GRE tunnel.
Definition: gre.h:176
#define hash_unset_mem(h, key)
Definition: hash.h:291
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:226
#define gm
Definition: dlmalloc.c:1217
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
long ctx[MAX_CONNS]
Definition: main.c:144
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:116
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:435
#define pool_put(P, E)
Free an object E in pool P.
Definition: pool.h:274
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:293
An node in the FIB graph.
Definition: fib_node.h:289
#define GTK_SESSION_ID_MAX
Definition: gre.h:143
u32 flags
Definition: vhost_user.h:115
clib_error_t * gre_interface_admin_up_down(vnet_main_t *vnm, u32 hw_if_index, u32 flags)
Definition: interface.c:485
unformat_function_t unformat_ip6_address
Definition: format.h:91
#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:674
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:388
gre_tunnel_type_t type
Definition: gre.h:208
#define UNFORMAT_END_OF_INPUT
Definition: format.h:144
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:877
vl_api_address_t dst
Definition: vxlan_gbp.api:34
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:277
#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:145
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:572
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:54
Context passed between object during a back walk.
Definition: fib_node.h:202
#define VLIB_CLI_COMMAND(x,...)
Definition: cli.h:155
void ethernet_delete_interface(vnet_main_t *vnm, u32 hw_if_index)
Definition: interface.c:323
#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:219
void adj_nbr_midchain_stack(adj_index_t adj_index, const dpo_id_t *next)
adj_nbr_midchain_stack
Definition: adj_midchain.c:571
ip6_main_t ip6_main
Definition: ip6_forward.c:2590
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:277
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:96
static void clib_mem_free(void *p)
Definition: mem.h:205
u32 set_int_l2_mode(vlib_main_t *vm, vnet_main_t *vnet_main, u32 mode, u32 sw_if_index, u32 bd_index, l2_bd_port_type_t port_type, u32 shg, u32 xc_sw_if_index)
Set the subinterface to run in l2 or l3 mode.
Definition: l2_input.c:572
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:549
Union of the two possible key types.
Definition: gre.h:148
static void * clib_mem_alloc(uword size)
Definition: mem.h:132
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:913
fib_node_t node
Linkage into the FIB object graph.
Definition: gre.h:186
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
u64 uword
Definition: types.h:112
u32 ref_count
Definition: gre.h:160
static void unformat_free(unformat_input_t *i)
Definition: format.h:162
static void hash_set_mem_alloc(uword **h, void *key, uword v)
Definition: hash.h:279
#define DPO_INVALID
An initialiser for DPOs declared on the stack.
Definition: dpo.h:195
void vnet_sw_interface_set_mtu(vnet_main_t *vnm, u32 sw_if_index, u32 mtu)
Definition: interface.c:605
#define FOR_EACH_FIB_IP_PROTOCOL(_item)
Definition: fib_types.h:70
#define hash_get_mem(h, key)
Definition: hash.h:269
static void hash_unset_mem_free(uword **h, void *key)
Definition: hash.h:295
A FIB graph nodes virtual function table.
Definition: fib_node.h:276
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:409
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:900
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:477
vlib_main_t * vlib_main
Definition: gre.h:297
#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:486
#define CLIB_CACHE_LINE_BYTES
Definition: cache.h:59
void vlib_cli_output(vlib_main_t *vm, char *fmt,...)
Definition: cli.c:725
int vnet_gre_add_del_tunnel(vnet_gre_add_del_tunnel_args_t *a, u32 *sw_if_indexp)
Definition: interface.c:462
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:29
fib_forward_chain_type_t fib_forw_chain_type_from_fib_proto(fib_protocol_t proto)
Convert from a fib-protocol to a chain type.
Definition: fib_types.c:343
const ip46_address_t zero_addr
Definition: lookup.c:318
uword unformat(unformat_input_t *i, const char *fmt,...)
Definition: unformat.c:972
static uword unformat_check_input(unformat_input_t *i)
Definition: format.h:170
#define MODE_L3
Definition: l2_input.h:205
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:245
static uword pool_elts(void *v)
Number of active elements in a pool.
Definition: pool.h:128