session: send ctrl msg over mq
[vpp.git] / src / vnet / interface.c
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  * interface.c: VNET interfaces/sub-interfaces
17  *
18  * Copyright (c) 2008 Eliot Dresselhaus
19  *
20  * Permission is hereby granted, free of charge, to any person obtaining
21  * a copy of this software and associated documentation files (the
22  * "Software"), to deal in the Software without restriction, including
23  * without limitation the rights to use, copy, modify, merge, publish,
24  * distribute, sublicense, and/or sell copies of the Software, and to
25  * permit persons to whom the Software is furnished to do so, subject to
26  * the following conditions:
27  *
28  * The above copyright notice and this permission notice shall be
29  * included in all copies or substantial portions of the Software.
30  *
31  *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
32  *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
33  *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
34  *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
35  *  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
36  *  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
37  *  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
38  */
39
40 #include <vnet/vnet.h>
41 #include <vnet/plugin/plugin.h>
42 #include <vnet/fib/ip6_fib.h>
43 #include <vnet/adj/adj.h>
44 #include <vnet/adj/adj_mcast.h>
45
46 #define VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE (1 << 0)
47 #define VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE (1 << 1)
48
49 static clib_error_t *vnet_hw_interface_set_flags_helper (vnet_main_t * vnm,
50                                                          u32 hw_if_index,
51                                                          u32 flags,
52                                                          u32 helper_flags);
53
54 static clib_error_t *vnet_sw_interface_set_flags_helper (vnet_main_t * vnm,
55                                                          u32 sw_if_index,
56                                                          u32 flags,
57                                                          u32 helper_flags);
58
59 static clib_error_t *vnet_hw_interface_set_class_helper (vnet_main_t * vnm,
60                                                          u32 hw_if_index,
61                                                          u32 hw_class_index,
62                                                          u32 redistribute);
63
64 typedef struct
65 {
66   /* Either sw or hw interface index. */
67   u32 sw_hw_if_index;
68
69   /* Flags. */
70   u32 flags;
71 } vnet_sw_hw_interface_state_t;
72
73 static void
74 serialize_vec_vnet_sw_hw_interface_state (serialize_main_t * m, va_list * va)
75 {
76   vnet_sw_hw_interface_state_t *s =
77     va_arg (*va, vnet_sw_hw_interface_state_t *);
78   u32 n = va_arg (*va, u32);
79   u32 i;
80   for (i = 0; i < n; i++)
81     {
82       serialize_integer (m, s[i].sw_hw_if_index,
83                          sizeof (s[i].sw_hw_if_index));
84       serialize_integer (m, s[i].flags, sizeof (s[i].flags));
85     }
86 }
87
88 static void
89 unserialize_vec_vnet_sw_hw_interface_state (serialize_main_t * m,
90                                             va_list * va)
91 {
92   vnet_sw_hw_interface_state_t *s =
93     va_arg (*va, vnet_sw_hw_interface_state_t *);
94   u32 n = va_arg (*va, u32);
95   u32 i;
96   for (i = 0; i < n; i++)
97     {
98       unserialize_integer (m, &s[i].sw_hw_if_index,
99                            sizeof (s[i].sw_hw_if_index));
100       unserialize_integer (m, &s[i].flags, sizeof (s[i].flags));
101     }
102 }
103
104 static void
105 serialize_vnet_sw_hw_interface_set_flags (serialize_main_t * m, va_list * va)
106 {
107   vnet_sw_hw_interface_state_t *s =
108     va_arg (*va, vnet_sw_hw_interface_state_t *);
109   serialize (m, serialize_vec_vnet_sw_hw_interface_state, s, 1);
110 }
111
112 static void
113 unserialize_vnet_sw_interface_set_flags (serialize_main_t * m, va_list * va)
114 {
115   CLIB_UNUSED (mc_main_t * mc) = va_arg (*va, mc_main_t *);
116   vnet_sw_hw_interface_state_t s;
117
118   unserialize (m, unserialize_vec_vnet_sw_hw_interface_state, &s, 1);
119
120   vnet_sw_interface_set_flags_helper
121     (vnet_get_main (), s.sw_hw_if_index, s.flags,
122      /* helper_flags no redistribution */ 0);
123 }
124
125 static void
126 unserialize_vnet_hw_interface_set_flags (serialize_main_t * m, va_list * va)
127 {
128   CLIB_UNUSED (mc_main_t * mc) = va_arg (*va, mc_main_t *);
129   vnet_sw_hw_interface_state_t s;
130
131   unserialize (m, unserialize_vec_vnet_sw_hw_interface_state, &s, 1);
132
133   vnet_hw_interface_set_flags_helper
134     (vnet_get_main (), s.sw_hw_if_index, s.flags,
135      /* helper_flags no redistribution */ 0);
136 }
137
138 MC_SERIALIZE_MSG (vnet_sw_interface_set_flags_msg, static) =
139 {
140 .name = "vnet_sw_interface_set_flags",.serialize =
141     serialize_vnet_sw_hw_interface_set_flags,.unserialize =
142     unserialize_vnet_sw_interface_set_flags,};
143
144 MC_SERIALIZE_MSG (vnet_hw_interface_set_flags_msg, static) =
145 {
146 .name = "vnet_hw_interface_set_flags",.serialize =
147     serialize_vnet_sw_hw_interface_set_flags,.unserialize =
148     unserialize_vnet_hw_interface_set_flags,};
149
150 void
151 serialize_vnet_interface_state (serialize_main_t * m, va_list * va)
152 {
153   vnet_main_t *vnm = va_arg (*va, vnet_main_t *);
154   vnet_sw_hw_interface_state_t *sts = 0, *st;
155   vnet_sw_interface_t *sif;
156   vnet_hw_interface_t *hif;
157   vnet_interface_main_t *im = &vnm->interface_main;
158
159   /* Serialize hardware interface classes since they may have changed.
160      Must do this before sending up/down flags. */
161   /* *INDENT-OFF* */
162   pool_foreach (hif, im->hw_interfaces, ({
163     vnet_hw_interface_class_t * hw_class = vnet_get_hw_interface_class (vnm, hif->hw_class_index);
164     serialize_cstring (m, hw_class->name);
165   }));
166   /* *INDENT-ON* */
167
168   /* Send sw/hw interface state when non-zero. */
169   /* *INDENT-OFF* */
170   pool_foreach (sif, im->sw_interfaces, ({
171     if (sif->flags != 0)
172       {
173         vec_add2 (sts, st, 1);
174         st->sw_hw_if_index = sif->sw_if_index;
175         st->flags = sif->flags;
176       }
177   }));
178   /* *INDENT-ON* */
179
180   vec_serialize (m, sts, serialize_vec_vnet_sw_hw_interface_state);
181
182   if (sts)
183     _vec_len (sts) = 0;
184
185   /* *INDENT-OFF* */
186   pool_foreach (hif, im->hw_interfaces, ({
187     if (hif->flags != 0)
188       {
189         vec_add2 (sts, st, 1);
190         st->sw_hw_if_index = hif->hw_if_index;
191         st->flags = hif->flags;
192       }
193   }));
194   /* *INDENT-ON* */
195
196   vec_serialize (m, sts, serialize_vec_vnet_sw_hw_interface_state);
197
198   vec_free (sts);
199 }
200
201 void
202 unserialize_vnet_interface_state (serialize_main_t * m, va_list * va)
203 {
204   vnet_main_t *vnm = va_arg (*va, vnet_main_t *);
205   vnet_sw_hw_interface_state_t *sts = 0, *st;
206
207   /* First set interface hardware class. */
208   {
209     vnet_interface_main_t *im = &vnm->interface_main;
210     vnet_hw_interface_t *hif;
211     char *class_name;
212     uword *p;
213     clib_error_t *error;
214
215     /* *INDENT-OFF* */
216     pool_foreach (hif, im->hw_interfaces, ({
217       unserialize_cstring (m, &class_name);
218       p = hash_get_mem (im->hw_interface_class_by_name, class_name);
219       ASSERT (p != 0);
220       error = vnet_hw_interface_set_class_helper (vnm, hif->hw_if_index, p[0], /* redistribute */ 0);
221       if (error)
222         clib_error_report (error);
223       vec_free (class_name);
224     }));
225     /* *INDENT-ON* */
226   }
227
228   vec_unserialize (m, &sts, unserialize_vec_vnet_sw_hw_interface_state);
229   vec_foreach (st, sts)
230     vnet_sw_interface_set_flags_helper (vnm, st->sw_hw_if_index, st->flags,
231                                         /* no distribute */ 0);
232   vec_free (sts);
233
234   vec_unserialize (m, &sts, unserialize_vec_vnet_sw_hw_interface_state);
235   vec_foreach (st, sts)
236     vnet_hw_interface_set_flags_helper (vnm, st->sw_hw_if_index, st->flags,
237                                         /* no distribute */ 0);
238   vec_free (sts);
239 }
240
241 static clib_error_t *
242 call_elf_section_interface_callbacks (vnet_main_t * vnm, u32 if_index,
243                                       u32 flags,
244                                       _vnet_interface_function_list_elt_t **
245                                       elts)
246 {
247   _vnet_interface_function_list_elt_t *elt;
248   vnet_interface_function_priority_t prio;
249   clib_error_t *error = 0;
250
251   for (prio = VNET_ITF_FUNC_PRIORITY_LOW;
252        prio <= VNET_ITF_FUNC_PRIORITY_HIGH; prio++)
253     {
254       elt = elts[prio];
255
256       while (elt)
257         {
258           error = elt->fp (vnm, if_index, flags);
259           if (error)
260             return error;
261           elt = elt->next_interface_function;
262         }
263     }
264   return error;
265 }
266
267 static clib_error_t *
268 call_hw_interface_add_del_callbacks (vnet_main_t * vnm, u32 hw_if_index,
269                                      u32 is_create)
270 {
271   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
272   vnet_hw_interface_class_t *hw_class =
273     vnet_get_hw_interface_class (vnm, hi->hw_class_index);
274   vnet_device_class_t *dev_class =
275     vnet_get_device_class (vnm, hi->dev_class_index);
276   clib_error_t *error = 0;
277
278   if (hw_class->interface_add_del_function
279       && (error =
280           hw_class->interface_add_del_function (vnm, hw_if_index, is_create)))
281     return error;
282
283   if (dev_class->interface_add_del_function
284       && (error =
285           dev_class->interface_add_del_function (vnm, hw_if_index,
286                                                  is_create)))
287     return error;
288
289   error = call_elf_section_interface_callbacks
290     (vnm, hw_if_index, is_create, vnm->hw_interface_add_del_functions);
291
292   return error;
293 }
294
295 static clib_error_t *
296 call_sw_interface_add_del_callbacks (vnet_main_t * vnm, u32 sw_if_index,
297                                      u32 is_create)
298 {
299   return call_elf_section_interface_callbacks
300     (vnm, sw_if_index, is_create, vnm->sw_interface_add_del_functions);
301 }
302
303 #define VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE (1 << 0)
304 #define VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE (1 << 1)
305
306 static clib_error_t *
307 vnet_hw_interface_set_flags_helper (vnet_main_t * vnm, u32 hw_if_index,
308                                     u32 flags, u32 helper_flags)
309 {
310   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
311   vnet_hw_interface_class_t *hw_class =
312     vnet_get_hw_interface_class (vnm, hi->hw_class_index);
313   vnet_device_class_t *dev_class =
314     vnet_get_device_class (vnm, hi->dev_class_index);
315   vlib_main_t *vm = vnm->vlib_main;
316   u32 mask;
317   clib_error_t *error = 0;
318   u32 is_create =
319     (helper_flags & VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE) != 0;
320
321   mask =
322     (VNET_HW_INTERFACE_FLAG_LINK_UP | VNET_HW_INTERFACE_FLAG_DUPLEX_MASK |
323      VNET_HW_INTERFACE_FLAG_SPEED_MASK);
324   flags &= mask;
325
326   /* Call hardware interface add/del callbacks. */
327   if (is_create)
328     call_hw_interface_add_del_callbacks (vnm, hw_if_index, is_create);
329
330   /* Already in the desired state? */
331   if (!is_create && (hi->flags & mask) == flags)
332     goto done;
333
334   /* Some interface classes do not redistribute (e.g. are local). */
335   if (!dev_class->redistribute)
336     helper_flags &= ~VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE;
337
338   if (vm->mc_main
339       && (helper_flags & VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE))
340     {
341       vnet_sw_hw_interface_state_t s;
342       s.sw_hw_if_index = hw_if_index;
343       s.flags = flags;
344       mc_serialize (vm->mc_main, &vnet_hw_interface_set_flags_msg, &s);
345     }
346
347   if ((hi->flags & VNET_HW_INTERFACE_FLAG_LINK_UP) !=
348       (flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
349     {
350       /* Do hardware class (e.g. ethernet). */
351       if (hw_class->link_up_down_function
352           && (error = hw_class->link_up_down_function (vnm, hw_if_index,
353                                                        flags)))
354         goto done;
355
356       error = call_elf_section_interface_callbacks
357         (vnm, hw_if_index, flags, vnm->hw_interface_link_up_down_functions);
358
359       if (error)
360         goto done;
361     }
362
363   hi->flags &= ~mask;
364   hi->flags |= flags;
365
366 done:
367   return error;
368 }
369
370 static clib_error_t *
371 vnet_sw_interface_set_flags_helper (vnet_main_t * vnm, u32 sw_if_index,
372                                     u32 flags, u32 helper_flags)
373 {
374   vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
375   vlib_main_t *vm = vnm->vlib_main;
376   u32 mask;
377   clib_error_t *error = 0;
378   u32 is_create =
379     (helper_flags & VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE) != 0;
380   u32 old_flags;
381
382   mask = VNET_SW_INTERFACE_FLAG_ADMIN_UP | VNET_SW_INTERFACE_FLAG_PUNT;
383   flags &= mask;
384
385   if (is_create)
386     {
387       error =
388         call_sw_interface_add_del_callbacks (vnm, sw_if_index, is_create);
389       if (error)
390         goto done;
391
392       if (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
393         {
394           /* Notify everyone when the interface is created as admin up */
395           error = call_elf_section_interface_callbacks (vnm, sw_if_index,
396                                                         flags,
397                                                         vnm->
398                                                         sw_interface_admin_up_down_functions);
399           if (error)
400             goto done;
401         }
402     }
403   else
404     {
405       vnet_sw_interface_t *si_sup = si;
406
407       /* Check that super interface is in correct state. */
408       if (si->type == VNET_SW_INTERFACE_TYPE_SUB)
409         {
410           si_sup = vnet_get_sw_interface (vnm, si->sup_sw_if_index);
411
412           /* Check to see if we're bringing down the soft interface and if it's parent is up */
413           if ((flags != (si_sup->flags & mask)) &&
414               (!((flags == 0)
415                  && ((si_sup->flags & mask) ==
416                      VNET_SW_INTERFACE_FLAG_ADMIN_UP))))
417             {
418               error = clib_error_return (0, "super-interface %U must be %U",
419                                          format_vnet_sw_interface_name, vnm,
420                                          si_sup,
421                                          format_vnet_sw_interface_flags,
422                                          flags);
423               goto done;
424             }
425         }
426
427       /* Donot change state for slave link of bonded interfaces */
428       if (si->flags & VNET_SW_INTERFACE_FLAG_BOND_SLAVE)
429         {
430           error = clib_error_return
431             (0, "not allowed as %U belong to a BondEthernet interface",
432              format_vnet_sw_interface_name, vnm, si);
433           goto done;
434         }
435
436       /* Already in the desired state? */
437       if ((si->flags & mask) == flags)
438         goto done;
439
440       /* Sub-interfaces of hardware interfaces that do no redistribute,
441          do not redistribute themselves. */
442       if (si_sup->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
443         {
444           vnet_hw_interface_t *hi =
445             vnet_get_hw_interface (vnm, si_sup->hw_if_index);
446           vnet_device_class_t *dev_class =
447             vnet_get_device_class (vnm, hi->dev_class_index);
448           if (!dev_class->redistribute)
449             helper_flags &=
450               ~VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE;
451         }
452
453       if (vm->mc_main
454           && (helper_flags &
455               VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE))
456         {
457           vnet_sw_hw_interface_state_t s;
458           s.sw_hw_if_index = sw_if_index;
459           s.flags = flags;
460           mc_serialize (vm->mc_main, &vnet_sw_interface_set_flags_msg, &s);
461         }
462
463       /* set the flags now before invoking the registered clients
464        * so that the state they query is consistent with the state here notified */
465       old_flags = si->flags;
466       si->flags &= ~mask;
467       si->flags |= flags;
468       if ((flags | old_flags) & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
469         error = call_elf_section_interface_callbacks
470           (vnm, sw_if_index, flags,
471            vnm->sw_interface_admin_up_down_functions);
472
473       if (error)
474         {
475           /* restore flags on error */
476           si->flags = old_flags;
477           goto done;
478         }
479
480       if (si->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
481         {
482           vnet_hw_interface_t *hi =
483             vnet_get_hw_interface (vnm, si->hw_if_index);
484           vnet_hw_interface_class_t *hw_class =
485             vnet_get_hw_interface_class (vnm, hi->hw_class_index);
486           vnet_device_class_t *dev_class =
487             vnet_get_device_class (vnm, hi->dev_class_index);
488
489           if ((flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) &&
490               (si->flags & VNET_SW_INTERFACE_FLAG_ERROR))
491             {
492               error = clib_error_return (0, "Interface in the error state");
493               goto done;
494             }
495
496           /* save the si admin up flag */
497           old_flags = si->flags;
498
499           /* update si admin up flag in advance if we are going admin down */
500           if (!(flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
501             si->flags &= ~VNET_SW_INTERFACE_FLAG_ADMIN_UP;
502
503           if (dev_class->admin_up_down_function
504               && (error = dev_class->admin_up_down_function (vnm,
505                                                              si->hw_if_index,
506                                                              flags)))
507             {
508               /* restore si admin up flag to it's original state on errors */
509               si->flags = old_flags;
510               goto done;
511             }
512
513           if (hw_class->admin_up_down_function
514               && (error = hw_class->admin_up_down_function (vnm,
515                                                             si->hw_if_index,
516                                                             flags)))
517             {
518               /* restore si admin up flag to it's original state on errors */
519               si->flags = old_flags;
520               goto done;
521             }
522
523           /* Admin down implies link down. */
524           if (!(flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
525               && (hi->flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
526             vnet_hw_interface_set_flags_helper (vnm, si->hw_if_index,
527                                                 hi->flags &
528                                                 ~VNET_HW_INTERFACE_FLAG_LINK_UP,
529                                                 helper_flags);
530         }
531     }
532
533   si->flags &= ~mask;
534   si->flags |= flags;
535
536 done:
537   return error;
538 }
539
540 clib_error_t *
541 vnet_hw_interface_set_flags (vnet_main_t * vnm, u32 hw_if_index, u32 flags)
542 {
543   return vnet_hw_interface_set_flags_helper
544     (vnm, hw_if_index, flags,
545      VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE);
546 }
547
548 clib_error_t *
549 vnet_sw_interface_set_flags (vnet_main_t * vnm, u32 sw_if_index, u32 flags)
550 {
551   return vnet_sw_interface_set_flags_helper
552     (vnm, sw_if_index, flags,
553      VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE);
554 }
555
556 static u32
557 vnet_create_sw_interface_no_callbacks (vnet_main_t * vnm,
558                                        vnet_sw_interface_t * template)
559 {
560   vnet_interface_main_t *im = &vnm->interface_main;
561   vnet_sw_interface_t *sw;
562   u32 sw_if_index;
563
564   pool_get (im->sw_interfaces, sw);
565   sw_if_index = sw - im->sw_interfaces;
566
567   sw[0] = template[0];
568
569   sw->flags = 0;
570   sw->sw_if_index = sw_if_index;
571   if (sw->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
572     sw->sup_sw_if_index = sw->sw_if_index;
573
574   /* Allocate counters for this interface. */
575   {
576     u32 i;
577
578     vnet_interface_counter_lock (im);
579
580     for (i = 0; i < vec_len (im->sw_if_counters); i++)
581       {
582         vlib_validate_simple_counter (&im->sw_if_counters[i], sw_if_index);
583         vlib_zero_simple_counter (&im->sw_if_counters[i], sw_if_index);
584       }
585
586     for (i = 0; i < vec_len (im->combined_sw_if_counters); i++)
587       {
588         vlib_validate_combined_counter (&im->combined_sw_if_counters[i],
589                                         sw_if_index);
590         vlib_zero_combined_counter (&im->combined_sw_if_counters[i],
591                                     sw_if_index);
592       }
593
594     vnet_interface_counter_unlock (im);
595   }
596
597   return sw_if_index;
598 }
599
600 clib_error_t *
601 vnet_create_sw_interface (vnet_main_t * vnm, vnet_sw_interface_t * template,
602                           u32 * sw_if_index)
603 {
604   clib_error_t *error;
605   vnet_hw_interface_t *hi;
606   vnet_device_class_t *dev_class;
607
608   hi = vnet_get_sup_hw_interface (vnm, template->sup_sw_if_index);
609   dev_class = vnet_get_device_class (vnm, hi->dev_class_index);
610
611   if (template->type == VNET_SW_INTERFACE_TYPE_SUB &&
612       dev_class->subif_add_del_function)
613     {
614       error = dev_class->subif_add_del_function (vnm, hi->hw_if_index,
615                                                  (struct vnet_sw_interface_t
616                                                   *) template, 1);
617       if (error)
618         return error;
619     }
620
621   *sw_if_index = vnet_create_sw_interface_no_callbacks (vnm, template);
622   error = vnet_sw_interface_set_flags_helper
623     (vnm, *sw_if_index, template->flags,
624      VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE);
625
626   if (error)
627     {
628       /* undo the work done by vnet_create_sw_interface_no_callbacks() */
629       vnet_interface_main_t *im = &vnm->interface_main;
630       vnet_sw_interface_t *sw =
631         pool_elt_at_index (im->sw_interfaces, *sw_if_index);
632       pool_put (im->sw_interfaces, sw);
633     }
634
635   return error;
636 }
637
638 void
639 vnet_delete_sw_interface (vnet_main_t * vnm, u32 sw_if_index)
640 {
641   vnet_interface_main_t *im = &vnm->interface_main;
642   vnet_sw_interface_t *sw =
643     pool_elt_at_index (im->sw_interfaces, sw_if_index);
644
645   /* Check if the interface has config and is removed from L2 BD or XConnect */
646   vlib_main_t *vm = vlib_get_main ();
647   l2_input_config_t *config;
648   if (sw_if_index < vec_len (l2input_main.configs))
649     {
650       config = vec_elt_at_index (l2input_main.configs, sw_if_index);
651       if (config->xconnect)
652         set_int_l2_mode (vm, vnm, MODE_L3, config->output_sw_if_index, 0, 0,
653                          0, 0);
654       if (config->xconnect || config->bridge)
655         set_int_l2_mode (vm, vnm, MODE_L3, sw_if_index, 0, 0, 0, 0);
656     }
657   vnet_clear_sw_interface_tag (vnm, sw_if_index);
658
659   /* Bring down interface in case it is up. */
660   if (sw->flags != 0)
661     vnet_sw_interface_set_flags (vnm, sw_if_index, /* flags */ 0);
662
663   call_sw_interface_add_del_callbacks (vnm, sw_if_index, /* is_create */ 0);
664
665   pool_put (im->sw_interfaces, sw);
666 }
667
668 static clib_error_t *
669 call_sw_interface_mtu_change_callbacks (vnet_main_t * vnm, u32 sw_if_index)
670 {
671   return call_elf_section_interface_callbacks
672     (vnm, sw_if_index, 0, vnm->sw_interface_mtu_change_functions);
673 }
674
675 void
676 vnet_sw_interface_set_mtu (vnet_main_t * vnm, u32 sw_if_index, u32 mtu)
677 {
678   vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
679
680   if (si->mtu[VNET_MTU_L3] != mtu)
681     {
682       si->mtu[VNET_MTU_L3] = mtu;
683       call_sw_interface_mtu_change_callbacks (vnm, sw_if_index);
684     }
685 }
686
687 void
688 vnet_sw_interface_set_protocol_mtu (vnet_main_t * vnm, u32 sw_if_index,
689                                     u32 mtu[])
690 {
691   vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
692   bool changed = false;
693   int i;
694
695   for (i = 0; i < VNET_N_MTU; i++)
696     {
697       if (si->mtu[i] != mtu[i])
698         {
699           si->mtu[i] = mtu[i];
700           changed = true;
701         }
702     }
703   /* Notify interested parties */
704   if (changed)
705     call_sw_interface_mtu_change_callbacks (vnm, sw_if_index);
706 }
707
708 /*
709  * Reflect a change in hardware MTU on protocol MTUs
710  */
711 static walk_rc_t
712 sw_interface_walk_callback (vnet_main_t * vnm, u32 sw_if_index, void *ctx)
713 {
714   u32 *link_mtu = ctx;
715   vnet_sw_interface_set_mtu (vnm, sw_if_index, *link_mtu);
716   return WALK_CONTINUE;
717 }
718
719 void
720 vnet_hw_interface_set_mtu (vnet_main_t * vnm, u32 hw_if_index, u32 mtu)
721 {
722   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
723
724   if (hi->max_packet_bytes != mtu)
725     {
726       hi->max_packet_bytes = mtu;
727       ethernet_set_flags (vnm, hw_if_index, ETHERNET_INTERFACE_FLAG_MTU);
728       vnet_hw_interface_walk_sw (vnm, hw_if_index, sw_interface_walk_callback,
729                                  &mtu);
730     }
731 }
732
733 static void
734 setup_tx_node (vlib_main_t * vm,
735                u32 node_index, vnet_device_class_t * dev_class)
736 {
737   vlib_node_t *n = vlib_get_node (vm, node_index);
738
739   n->function = dev_class->tx_function;
740   n->format_trace = dev_class->format_tx_trace;
741
742   vlib_register_errors (vm, node_index,
743                         dev_class->tx_function_n_errors,
744                         dev_class->tx_function_error_strings);
745 }
746
747 static void
748 setup_output_node (vlib_main_t * vm,
749                    u32 node_index, vnet_hw_interface_class_t * hw_class)
750 {
751   vlib_node_t *n = vlib_get_node (vm, node_index);
752   n->format_buffer = hw_class->format_header;
753   n->unformat_buffer = hw_class->unformat_header;
754 }
755
756 /* Register an interface instance. */
757 u32
758 vnet_register_interface (vnet_main_t * vnm,
759                          u32 dev_class_index,
760                          u32 dev_instance,
761                          u32 hw_class_index, u32 hw_instance)
762 {
763   vnet_interface_main_t *im = &vnm->interface_main;
764   vnet_hw_interface_t *hw;
765   vnet_device_class_t *dev_class =
766     vnet_get_device_class (vnm, dev_class_index);
767   vnet_hw_interface_class_t *hw_class =
768     vnet_get_hw_interface_class (vnm, hw_class_index);
769   vlib_main_t *vm = vnm->vlib_main;
770   vnet_feature_config_main_t *fcm;
771   vnet_config_main_t *cm;
772   u32 hw_index, i;
773   char *tx_node_name = NULL, *output_node_name = NULL;
774
775   pool_get (im->hw_interfaces, hw);
776   memset (hw, 0, sizeof (*hw));
777
778   hw_index = hw - im->hw_interfaces;
779   hw->hw_if_index = hw_index;
780   hw->default_rx_mode = VNET_HW_INTERFACE_RX_MODE_POLLING;
781
782   if (dev_class->format_device_name)
783     hw->name = format (0, "%U", dev_class->format_device_name, dev_instance);
784   else if (hw_class->format_interface_name)
785     hw->name = format (0, "%U", hw_class->format_interface_name,
786                        dev_instance);
787   else
788     hw->name = format (0, "%s%x", hw_class->name, dev_instance);
789
790   if (!im->hw_interface_by_name)
791     im->hw_interface_by_name = hash_create_vec ( /* size */ 0,
792                                                 sizeof (hw->name[0]),
793                                                 sizeof (uword));
794
795   hash_set_mem (im->hw_interface_by_name, hw->name, hw_index);
796
797   /* Make hardware interface point to software interface. */
798   {
799     vnet_sw_interface_t sw = {
800       .type = VNET_SW_INTERFACE_TYPE_HARDWARE,
801       .flood_class = VNET_FLOOD_CLASS_NORMAL,
802       .hw_if_index = hw_index
803     };
804     hw->sw_if_index = vnet_create_sw_interface_no_callbacks (vnm, &sw);
805   }
806
807   hw->dev_class_index = dev_class_index;
808   hw->dev_instance = dev_instance;
809   hw->hw_class_index = hw_class_index;
810   hw->hw_instance = hw_instance;
811
812   hw->max_rate_bits_per_sec = 0;
813   hw->min_packet_bytes = 0;
814   vnet_sw_interface_set_mtu (vnm, hw->sw_if_index, 0);
815
816   if (dev_class->tx_function == 0)
817     goto no_output_nodes;       /* No output/tx nodes to create */
818
819   tx_node_name = (char *) format (0, "%v-tx", hw->name);
820   output_node_name = (char *) format (0, "%v-output", hw->name);
821
822   /* If we have previously deleted interface nodes, re-use them. */
823   if (vec_len (im->deleted_hw_interface_nodes) > 0)
824     {
825       vnet_hw_interface_nodes_t *hn;
826       vlib_node_t *node;
827       vlib_node_runtime_t *nrt;
828
829       hn = vec_end (im->deleted_hw_interface_nodes) - 1;
830
831       hw->tx_node_index = hn->tx_node_index;
832       hw->output_node_index = hn->output_node_index;
833
834       vlib_node_rename (vm, hw->tx_node_index, "%v", tx_node_name);
835       vlib_node_rename (vm, hw->output_node_index, "%v", output_node_name);
836
837       /* *INDENT-OFF* */
838       foreach_vlib_main ({
839         vnet_interface_output_runtime_t *rt;
840
841         rt = vlib_node_get_runtime_data (this_vlib_main, hw->output_node_index);
842         ASSERT (rt->is_deleted == 1);
843         rt->is_deleted = 0;
844         rt->hw_if_index = hw_index;
845         rt->sw_if_index = hw->sw_if_index;
846         rt->dev_instance = hw->dev_instance;
847
848         rt = vlib_node_get_runtime_data (this_vlib_main, hw->tx_node_index);
849         rt->hw_if_index = hw_index;
850         rt->sw_if_index = hw->sw_if_index;
851         rt->dev_instance = hw->dev_instance;
852       });
853       /* *INDENT-ON* */
854
855       /* The new class may differ from the old one.
856        * Functions have to be updated. */
857       node = vlib_get_node (vm, hw->output_node_index);
858       node->function = vnet_interface_output_node_multiarch_select ();
859       node->format_trace = format_vnet_interface_output_trace;
860       /* *INDENT-OFF* */
861       foreach_vlib_main ({
862         nrt = vlib_node_get_runtime (this_vlib_main, hw->output_node_index);
863         nrt->function = node->function;
864       });
865       /* *INDENT-ON* */
866
867       node = vlib_get_node (vm, hw->tx_node_index);
868       node->function = dev_class->tx_function;
869       node->format_trace = dev_class->format_tx_trace;
870       /* *INDENT-OFF* */
871       foreach_vlib_main ({
872         nrt = vlib_node_get_runtime (this_vlib_main, hw->tx_node_index);
873         nrt->function = node->function;
874       });
875       /* *INDENT-ON* */
876
877       _vec_len (im->deleted_hw_interface_nodes) -= 1;
878     }
879   else
880     {
881       vlib_node_registration_t r;
882       vnet_interface_output_runtime_t rt = {
883         .hw_if_index = hw_index,
884         .sw_if_index = hw->sw_if_index,
885         .dev_instance = hw->dev_instance,
886         .is_deleted = 0,
887       };
888
889       memset (&r, 0, sizeof (r));
890       r.type = VLIB_NODE_TYPE_INTERNAL;
891       r.runtime_data = &rt;
892       r.runtime_data_bytes = sizeof (rt);
893       r.scalar_size = 0;
894       r.vector_size = sizeof (u32);
895
896       r.flags = VLIB_NODE_FLAG_IS_OUTPUT;
897       r.name = tx_node_name;
898       r.function = dev_class->tx_function;
899
900       hw->tx_node_index = vlib_register_node (vm, &r);
901
902       vlib_node_add_named_next_with_slot (vm, hw->tx_node_index,
903                                           "error-drop",
904                                           VNET_INTERFACE_TX_NEXT_DROP);
905
906       r.flags = 0;
907       r.name = output_node_name;
908       r.function = vnet_interface_output_node_multiarch_select ();
909       r.format_trace = format_vnet_interface_output_trace;
910
911       {
912         static char *e[] = {
913           "interface is down",
914           "interface is deleted",
915         };
916
917         r.n_errors = ARRAY_LEN (e);
918         r.error_strings = e;
919       }
920       hw->output_node_index = vlib_register_node (vm, &r);
921
922       vlib_node_add_named_next_with_slot (vm, hw->output_node_index,
923                                           "error-drop",
924                                           VNET_INTERFACE_OUTPUT_NEXT_DROP);
925       vlib_node_add_next_with_slot (vm, hw->output_node_index,
926                                     hw->tx_node_index,
927                                     VNET_INTERFACE_OUTPUT_NEXT_TX);
928
929       /* add interface to the list of "output-interface" feature arc start nodes
930          and clone nexts from 1st interface if it exists */
931       fcm = vnet_feature_get_config_main (im->output_feature_arc_index);
932       cm = &fcm->config_main;
933       i = vec_len (cm->start_node_indices);
934       vec_validate (cm->start_node_indices, i);
935       cm->start_node_indices[i] = hw->output_node_index;
936       if (hw_index)
937         {
938           /* copy nexts from 1st interface */
939           vnet_hw_interface_t *first_hw;
940           vlib_node_t *first_node;
941
942           first_hw = vnet_get_hw_interface (vnm, /* hw_if_index */ 0);
943           first_node = vlib_get_node (vm, first_hw->output_node_index);
944
945           /* 1st 2 nexts are already added above */
946           for (i = 2; i < vec_len (first_node->next_nodes); i++)
947             vlib_node_add_next_with_slot (vm, hw->output_node_index,
948                                           first_node->next_nodes[i], i);
949         }
950     }
951
952   setup_output_node (vm, hw->output_node_index, hw_class);
953   setup_tx_node (vm, hw->tx_node_index, dev_class);
954
955 no_output_nodes:
956   /* Call all up/down callbacks with zero flags when interface is created. */
957   vnet_sw_interface_set_flags_helper (vnm, hw->sw_if_index, /* flags */ 0,
958                                       VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE);
959   vnet_hw_interface_set_flags_helper (vnm, hw_index, /* flags */ 0,
960                                       VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE);
961   vec_free (tx_node_name);
962   vec_free (output_node_name);
963
964   return hw_index;
965 }
966
967 void
968 vnet_delete_hw_interface (vnet_main_t * vnm, u32 hw_if_index)
969 {
970   vnet_interface_main_t *im = &vnm->interface_main;
971   vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
972   vlib_main_t *vm = vnm->vlib_main;
973   vnet_device_class_t *dev_class = vnet_get_device_class (vnm,
974                                                           hw->dev_class_index);
975   /* If it is up, mark it down. */
976   if (hw->flags != 0)
977     vnet_hw_interface_set_flags (vnm, hw_if_index, /* flags */ 0);
978
979   /* Call delete callbacks. */
980   call_hw_interface_add_del_callbacks (vnm, hw_if_index, /* is_create */ 0);
981
982   /* Delete any sub-interfaces. */
983   {
984     u32 id, sw_if_index;
985     /* *INDENT-OFF* */
986     hash_foreach (id, sw_if_index, hw->sub_interface_sw_if_index_by_id,
987     ({
988       vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
989       u64 sup_and_sub_key =
990         ((u64) (si->sup_sw_if_index) << 32) | (u64) si->sub.id;
991       hash_unset_mem_free (&im->sw_if_index_by_sup_and_sub, &sup_and_sub_key);
992       vnet_delete_sw_interface (vnm, sw_if_index);
993     }));
994     hash_free (hw->sub_interface_sw_if_index_by_id);
995     /* *INDENT-ON* */
996   }
997
998   /* Delete software interface corresponding to hardware interface. */
999   vnet_delete_sw_interface (vnm, hw->sw_if_index);
1000
1001   if (dev_class->tx_function)
1002     {
1003       /* Put output/tx nodes into recycle pool */
1004       vnet_hw_interface_nodes_t *dn;
1005
1006       /* *INDENT-OFF* */
1007       foreach_vlib_main
1008         ({
1009           vnet_interface_output_runtime_t *rt =
1010             vlib_node_get_runtime_data (this_vlib_main, hw->output_node_index);
1011
1012           /* Mark node runtime as deleted so output node (if called)
1013            * will drop packets. */
1014           rt->is_deleted = 1;
1015         });
1016       /* *INDENT-ON* */
1017
1018       vlib_node_rename (vm, hw->output_node_index,
1019                         "interface-%d-output-deleted", hw_if_index);
1020       vlib_node_rename (vm, hw->tx_node_index, "interface-%d-tx-deleted",
1021                         hw_if_index);
1022       vec_add2 (im->deleted_hw_interface_nodes, dn, 1);
1023       dn->tx_node_index = hw->tx_node_index;
1024       dn->output_node_index = hw->output_node_index;
1025     }
1026
1027   hash_unset_mem (im->hw_interface_by_name, hw->name);
1028   vec_free (hw->name);
1029   vec_free (hw->hw_address);
1030   vec_free (hw->input_node_thread_index_by_queue);
1031   vec_free (hw->dq_runtime_index_by_queue);
1032
1033   pool_put (im->hw_interfaces, hw);
1034 }
1035
1036 void
1037 vnet_hw_interface_walk_sw (vnet_main_t * vnm,
1038                            u32 hw_if_index,
1039                            vnet_hw_sw_interface_walk_t fn, void *ctx)
1040 {
1041   vnet_hw_interface_t *hi;
1042   u32 id, sw_if_index;
1043
1044   hi = vnet_get_hw_interface (vnm, hw_if_index);
1045   /* the super first, then the sub interfaces */
1046   if (WALK_STOP == fn (vnm, hi->sw_if_index, ctx))
1047     return;
1048
1049   /* *INDENT-OFF* */
1050   hash_foreach (id, sw_if_index,
1051                 hi->sub_interface_sw_if_index_by_id,
1052   ({
1053     if (WALK_STOP == fn (vnm, sw_if_index, ctx))
1054       break;
1055   }));
1056   /* *INDENT-ON* */
1057 }
1058
1059 void
1060 vnet_hw_interface_walk (vnet_main_t * vnm,
1061                         vnet_hw_interface_walk_t fn, void *ctx)
1062 {
1063   vnet_interface_main_t *im;
1064   vnet_hw_interface_t *hi;
1065
1066   im = &vnm->interface_main;
1067
1068   /* *INDENT-OFF* */
1069   pool_foreach (hi, im->hw_interfaces,
1070   ({
1071     if (WALK_STOP == fn(vnm, hi->hw_if_index, ctx))
1072       break;
1073   }));
1074   /* *INDENT-ON* */
1075 }
1076
1077 void
1078 vnet_sw_interface_walk (vnet_main_t * vnm,
1079                         vnet_sw_interface_walk_t fn, void *ctx)
1080 {
1081   vnet_interface_main_t *im;
1082   vnet_sw_interface_t *si;
1083
1084   im = &vnm->interface_main;
1085
1086   /* *INDENT-OFF* */
1087   pool_foreach (si, im->sw_interfaces,
1088   {
1089     if (WALK_STOP == fn (vnm, si, ctx))
1090       break;
1091   });
1092   /* *INDENT-ON* */
1093 }
1094
1095 static void
1096 serialize_vnet_hw_interface_set_class (serialize_main_t * m, va_list * va)
1097 {
1098   u32 hw_if_index = va_arg (*va, u32);
1099   char *hw_class_name = va_arg (*va, char *);
1100   serialize_integer (m, hw_if_index, sizeof (hw_if_index));
1101   serialize_cstring (m, hw_class_name);
1102 }
1103
1104 static void
1105 unserialize_vnet_hw_interface_set_class (serialize_main_t * m, va_list * va)
1106 {
1107   CLIB_UNUSED (mc_main_t * mc) = va_arg (*va, mc_main_t *);
1108   vnet_main_t *vnm = vnet_get_main ();
1109   u32 hw_if_index;
1110   char *hw_class_name;
1111   uword *p;
1112   clib_error_t *error;
1113
1114   unserialize_integer (m, &hw_if_index, sizeof (hw_if_index));
1115   unserialize_cstring (m, &hw_class_name);
1116   p =
1117     hash_get (vnm->interface_main.hw_interface_class_by_name, hw_class_name);
1118   ASSERT (p != 0);
1119   error = vnet_hw_interface_set_class_helper (vnm, hw_if_index, p[0],
1120                                               /* redistribute */ 0);
1121   if (error)
1122     clib_error_report (error);
1123 }
1124
1125 MC_SERIALIZE_MSG (vnet_hw_interface_set_class_msg, static) =
1126 {
1127 .name = "vnet_hw_interface_set_class",.serialize =
1128     serialize_vnet_hw_interface_set_class,.unserialize =
1129     unserialize_vnet_hw_interface_set_class,};
1130
1131 void
1132 vnet_hw_interface_init_for_class (vnet_main_t * vnm, u32 hw_if_index,
1133                                   u32 hw_class_index, u32 hw_instance)
1134 {
1135   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1136   vnet_hw_interface_class_t *hc =
1137     vnet_get_hw_interface_class (vnm, hw_class_index);
1138
1139   hi->hw_class_index = hw_class_index;
1140   hi->hw_instance = hw_instance;
1141   setup_output_node (vnm->vlib_main, hi->output_node_index, hc);
1142 }
1143
1144 static clib_error_t *
1145 vnet_hw_interface_set_class_helper (vnet_main_t * vnm, u32 hw_if_index,
1146                                     u32 hw_class_index, u32 redistribute)
1147 {
1148   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1149   vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, hi->sw_if_index);
1150   vnet_hw_interface_class_t *old_class =
1151     vnet_get_hw_interface_class (vnm, hi->hw_class_index);
1152   vnet_hw_interface_class_t *new_class =
1153     vnet_get_hw_interface_class (vnm, hw_class_index);
1154   vnet_device_class_t *dev_class =
1155     vnet_get_device_class (vnm, hi->dev_class_index);
1156   clib_error_t *error = 0;
1157
1158   /* New class equals old class?  Nothing to do. */
1159   if (hi->hw_class_index == hw_class_index)
1160     return 0;
1161
1162   /* No need (and incorrect since admin up flag may be set) to do error checking when
1163      receiving unserialize message. */
1164   if (redistribute)
1165     {
1166       if (si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
1167         return clib_error_return (0,
1168                                   "%v must be admin down to change class from %s to %s",
1169                                   hi->name, old_class->name, new_class->name);
1170
1171       /* Make sure interface supports given class. */
1172       if ((new_class->is_valid_class_for_interface
1173            && !new_class->is_valid_class_for_interface (vnm, hw_if_index,
1174                                                         hw_class_index))
1175           || (dev_class->is_valid_class_for_interface
1176               && !dev_class->is_valid_class_for_interface (vnm, hw_if_index,
1177                                                            hw_class_index)))
1178         return clib_error_return (0,
1179                                   "%v class cannot be changed from %s to %s",
1180                                   hi->name, old_class->name, new_class->name);
1181
1182       if (vnm->vlib_main->mc_main)
1183         {
1184           mc_serialize (vnm->vlib_main->mc_main,
1185                         &vnet_hw_interface_set_class_msg, hw_if_index,
1186                         new_class->name);
1187           return 0;
1188         }
1189     }
1190
1191   if (old_class->hw_class_change)
1192     old_class->hw_class_change (vnm, hw_if_index, old_class->index,
1193                                 new_class->index);
1194
1195   vnet_hw_interface_init_for_class (vnm, hw_if_index, new_class->index,
1196                                     /* instance */ ~0);
1197
1198   if (new_class->hw_class_change)
1199     new_class->hw_class_change (vnm, hw_if_index, old_class->index,
1200                                 new_class->index);
1201
1202   if (dev_class->hw_class_change)
1203     dev_class->hw_class_change (vnm, hw_if_index, new_class->index);
1204
1205   return error;
1206 }
1207
1208 clib_error_t *
1209 vnet_hw_interface_set_class (vnet_main_t * vnm, u32 hw_if_index,
1210                              u32 hw_class_index)
1211 {
1212   return vnet_hw_interface_set_class_helper (vnm, hw_if_index, hw_class_index,
1213                                              /* redistribute */ 1);
1214 }
1215
1216 static int
1217 vnet_hw_interface_rx_redirect_to_node_helper (vnet_main_t * vnm,
1218                                               u32 hw_if_index,
1219                                               u32 node_index,
1220                                               u32 redistribute)
1221 {
1222   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1223   vnet_device_class_t *dev_class = vnet_get_device_class
1224     (vnm, hi->dev_class_index);
1225
1226   if (redistribute)
1227     {
1228       /* $$$$ fixme someday maybe */
1229       ASSERT (vnm->vlib_main->mc_main == 0);
1230     }
1231   if (dev_class->rx_redirect_to_node)
1232     {
1233       dev_class->rx_redirect_to_node (vnm, hw_if_index, node_index);
1234       return 0;
1235     }
1236
1237   return VNET_API_ERROR_UNIMPLEMENTED;
1238 }
1239
1240 int
1241 vnet_hw_interface_rx_redirect_to_node (vnet_main_t * vnm, u32 hw_if_index,
1242                                        u32 node_index)
1243 {
1244   return vnet_hw_interface_rx_redirect_to_node_helper (vnm, hw_if_index,
1245                                                        node_index,
1246                                                        1 /* redistribute */ );
1247 }
1248
1249 word
1250 vnet_sw_interface_compare (vnet_main_t * vnm,
1251                            uword sw_if_index0, uword sw_if_index1)
1252 {
1253   vnet_sw_interface_t *sup0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1254   vnet_sw_interface_t *sup1 = vnet_get_sup_sw_interface (vnm, sw_if_index1);
1255   vnet_hw_interface_t *h0 = vnet_get_hw_interface (vnm, sup0->hw_if_index);
1256   vnet_hw_interface_t *h1 = vnet_get_hw_interface (vnm, sup1->hw_if_index);
1257
1258   if (h0 != h1)
1259     return vec_cmp (h0->name, h1->name);
1260   return (word) h0->hw_instance - (word) h1->hw_instance;
1261 }
1262
1263 word
1264 vnet_hw_interface_compare (vnet_main_t * vnm,
1265                            uword hw_if_index0, uword hw_if_index1)
1266 {
1267   vnet_hw_interface_t *h0 = vnet_get_hw_interface (vnm, hw_if_index0);
1268   vnet_hw_interface_t *h1 = vnet_get_hw_interface (vnm, hw_if_index1);
1269
1270   if (h0 != h1)
1271     return vec_cmp (h0->name, h1->name);
1272   return (word) h0->hw_instance - (word) h1->hw_instance;
1273 }
1274
1275 int
1276 vnet_sw_interface_is_p2p (vnet_main_t * vnm, u32 sw_if_index)
1277 {
1278   vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
1279   if ((si->type == VNET_SW_INTERFACE_TYPE_P2P) ||
1280       (si->type == VNET_SW_INTERFACE_TYPE_PIPE))
1281     return 1;
1282
1283   vnet_hw_interface_t *hw = vnet_get_sup_hw_interface (vnm, sw_if_index);
1284   vnet_hw_interface_class_t *hc =
1285     vnet_get_hw_interface_class (vnm, hw->hw_class_index);
1286
1287   return (hc->flags & VNET_HW_INTERFACE_CLASS_FLAG_P2P);
1288 }
1289
1290 clib_error_t *
1291 vnet_interface_init (vlib_main_t * vm)
1292 {
1293   vnet_main_t *vnm = vnet_get_main ();
1294   vnet_interface_main_t *im = &vnm->interface_main;
1295   vlib_buffer_t *b = 0;
1296   vnet_buffer_opaque_t *o = 0;
1297   clib_error_t *error;
1298
1299   /*
1300    * Keep people from shooting themselves in the foot.
1301    */
1302   if (sizeof (b->opaque) != sizeof (vnet_buffer_opaque_t))
1303     {
1304 #define _(a) if (sizeof(o->a) > sizeof (o->unused))                     \
1305       clib_warning                                                      \
1306         ("FATAL: size of opaque union subtype %s is %d (max %d)",       \
1307          #a, sizeof(o->a), sizeof (o->unused));
1308       foreach_buffer_opaque_union_subtype;
1309 #undef _
1310
1311       return clib_error_return
1312         (0, "FATAL: size of vlib buffer opaque %d, size of vnet opaque %d",
1313          sizeof (b->opaque), sizeof (vnet_buffer_opaque_t));
1314     }
1315
1316   im->sw_if_counter_lock = clib_mem_alloc_aligned (CLIB_CACHE_LINE_BYTES,
1317                                                    CLIB_CACHE_LINE_BYTES);
1318   im->sw_if_counter_lock[0] = 1;        /* should be no need */
1319
1320   vec_validate (im->sw_if_counters, VNET_N_SIMPLE_INTERFACE_COUNTER - 1);
1321 #define _(E,n,p)                                                        \
1322   im->sw_if_counters[VNET_INTERFACE_COUNTER_##E].name = #n;             \
1323   im->sw_if_counters[VNET_INTERFACE_COUNTER_##E].stat_segment_name = "/" #p "/" #n;
1324   foreach_simple_interface_counter_name
1325 #undef _
1326     vec_validate (im->combined_sw_if_counters,
1327                   VNET_N_COMBINED_INTERFACE_COUNTER - 1);
1328 #define _(E,n,p)                                                        \
1329   im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_##E].name = #n;    \
1330   im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_##E].stat_segment_name = "/" #p "/" #n;
1331   foreach_combined_interface_counter_name
1332 #undef _
1333     im->sw_if_counter_lock[0] = 0;
1334
1335   im->device_class_by_name = hash_create_string ( /* size */ 0,
1336                                                  sizeof (uword));
1337   {
1338     vnet_device_class_t *c;
1339
1340     c = vnm->device_class_registrations;
1341
1342     while (c)
1343       {
1344         c->index = vec_len (im->device_classes);
1345         hash_set_mem (im->device_class_by_name, c->name, c->index);
1346         vec_add1 (im->device_classes, c[0]);
1347         c = c->next_class_registration;
1348       }
1349   }
1350
1351   im->hw_interface_class_by_name = hash_create_string ( /* size */ 0,
1352                                                        sizeof (uword));
1353
1354   im->sw_if_index_by_sup_and_sub = hash_create_mem (0, sizeof (u64),
1355                                                     sizeof (uword));
1356   {
1357     vnet_hw_interface_class_t *c;
1358
1359     c = vnm->hw_interface_class_registrations;
1360
1361     while (c)
1362       {
1363         c->index = vec_len (im->hw_interface_classes);
1364         hash_set_mem (im->hw_interface_class_by_name, c->name, c->index);
1365
1366         if (NULL == c->build_rewrite)
1367           c->build_rewrite = default_build_rewrite;
1368         if (NULL == c->update_adjacency)
1369           c->update_adjacency = default_update_adjacency;
1370
1371         vec_add1 (im->hw_interface_classes, c[0]);
1372         c = c->next_class_registration;
1373       }
1374   }
1375
1376   if ((error = vlib_call_init_function (vm, vnet_interface_cli_init)))
1377     return error;
1378
1379   vnm->interface_tag_by_sw_if_index = hash_create (0, sizeof (uword));
1380
1381 #if VLIB_BUFFER_TRACE_TRAJECTORY > 0
1382   if ((error = vlib_call_init_function (vm, trajectory_trace_init)))
1383     return error;
1384 #endif
1385
1386   return 0;
1387 }
1388
1389 VLIB_INIT_FUNCTION (vnet_interface_init);
1390
1391 /* Kludge to renumber interface names [only!] */
1392 int
1393 vnet_interface_name_renumber (u32 sw_if_index, u32 new_show_dev_instance)
1394 {
1395   int rv;
1396   vnet_main_t *vnm = vnet_get_main ();
1397   vnet_interface_main_t *im = &vnm->interface_main;
1398   vnet_hw_interface_t *hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
1399
1400   vnet_device_class_t *dev_class = vnet_get_device_class
1401     (vnm, hi->dev_class_index);
1402
1403   if (dev_class->name_renumber == 0 || dev_class->format_device_name == 0)
1404     return VNET_API_ERROR_UNIMPLEMENTED;
1405
1406   rv = dev_class->name_renumber (hi, new_show_dev_instance);
1407
1408   if (rv)
1409     return rv;
1410
1411   hash_unset_mem (im->hw_interface_by_name, hi->name);
1412   vec_free (hi->name);
1413   /* Use the mapping we set up to call it Ishmael */
1414   hi->name = format (0, "%U", dev_class->format_device_name,
1415                      hi->dev_instance);
1416
1417   hash_set_mem (im->hw_interface_by_name, hi->name, hi->hw_if_index);
1418   return rv;
1419 }
1420
1421 clib_error_t *
1422 vnet_rename_interface (vnet_main_t * vnm, u32 hw_if_index, char *new_name)
1423 {
1424   vnet_interface_main_t *im = &vnm->interface_main;
1425   vlib_main_t *vm = vnm->vlib_main;
1426   vnet_hw_interface_t *hw;
1427   u8 *old_name;
1428   clib_error_t *error = 0;
1429
1430   hw = vnet_get_hw_interface (vnm, hw_if_index);
1431   if (!hw)
1432     {
1433       return clib_error_return (0,
1434                                 "unable to find hw interface for index %u",
1435                                 hw_if_index);
1436     }
1437
1438   old_name = hw->name;
1439
1440   /* set new hw->name */
1441   hw->name = format (0, "%s", new_name);
1442
1443   /* remove the old name to hw_if_index mapping and install the new one */
1444   hash_unset_mem (im->hw_interface_by_name, old_name);
1445   hash_set_mem (im->hw_interface_by_name, hw->name, hw_if_index);
1446
1447   /* rename tx/output nodes */
1448   vlib_node_rename (vm, hw->tx_node_index, "%v-tx", hw->name);
1449   vlib_node_rename (vm, hw->output_node_index, "%v-output", hw->name);
1450
1451   /* free the old name vector */
1452   vec_free (old_name);
1453
1454   return error;
1455 }
1456
1457 static clib_error_t *
1458 vnet_hw_interface_change_mac_address_helper (vnet_main_t * vnm,
1459                                              u32 hw_if_index,
1460                                              u8 * mac_address)
1461 {
1462   clib_error_t *error = 0;
1463   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1464
1465   if (hi->hw_address)
1466     {
1467       vnet_device_class_t *dev_class =
1468         vnet_get_device_class (vnm, hi->dev_class_index);
1469       if (dev_class->mac_addr_change_function)
1470         {
1471           error =
1472             dev_class->mac_addr_change_function (hi, (char *) mac_address);
1473         }
1474       if (!error)
1475         {
1476           vnet_hw_interface_class_t *hw_class;
1477
1478           hw_class = vnet_get_hw_interface_class (vnm, hi->hw_class_index);
1479
1480           if (NULL != hw_class->mac_addr_change_function)
1481             hw_class->mac_addr_change_function (hi, (char *) mac_address);
1482         }
1483       else
1484         {
1485           error =
1486             clib_error_return (0,
1487                                "MAC Address Change is not supported on this interface");
1488         }
1489     }
1490   else
1491     {
1492       error =
1493         clib_error_return (0,
1494                            "mac address change is not supported for interface index %u",
1495                            hw_if_index);
1496     }
1497   return error;
1498 }
1499
1500 clib_error_t *
1501 vnet_hw_interface_change_mac_address (vnet_main_t * vnm, u32 hw_if_index,
1502                                       u8 * mac_address)
1503 {
1504   return vnet_hw_interface_change_mac_address_helper
1505     (vnm, hw_if_index, mac_address);
1506 }
1507
1508 /* update the unnumbered state of an interface*/
1509 void
1510 vnet_sw_interface_update_unnumbered (u32 unnumbered_sw_if_index,
1511                                      u32 ip_sw_if_index, u8 enable)
1512 {
1513   vnet_main_t *vnm = vnet_get_main ();
1514   vnet_sw_interface_t *si;
1515   u32 was_unnum;
1516
1517   si = vnet_get_sw_interface (vnm, unnumbered_sw_if_index);
1518   was_unnum = (si->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED);
1519
1520   if (enable)
1521     {
1522       si->flags |= VNET_SW_INTERFACE_FLAG_UNNUMBERED;
1523       si->unnumbered_sw_if_index = ip_sw_if_index;
1524
1525       ip4_main.lookup_main.if_address_pool_index_by_sw_if_index
1526         [unnumbered_sw_if_index] =
1527         ip4_main.
1528         lookup_main.if_address_pool_index_by_sw_if_index[ip_sw_if_index];
1529       ip6_main.
1530         lookup_main.if_address_pool_index_by_sw_if_index
1531         [unnumbered_sw_if_index] =
1532         ip6_main.
1533         lookup_main.if_address_pool_index_by_sw_if_index[ip_sw_if_index];
1534     }
1535   else
1536     {
1537       si->flags &= ~(VNET_SW_INTERFACE_FLAG_UNNUMBERED);
1538       si->unnumbered_sw_if_index = (u32) ~ 0;
1539
1540       ip4_main.lookup_main.if_address_pool_index_by_sw_if_index
1541         [unnumbered_sw_if_index] = ~0;
1542       ip6_main.lookup_main.if_address_pool_index_by_sw_if_index
1543         [unnumbered_sw_if_index] = ~0;
1544     }
1545
1546   if (was_unnum != (si->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED))
1547     {
1548       ip4_sw_interface_enable_disable (unnumbered_sw_if_index, enable);
1549       ip6_sw_interface_enable_disable (unnumbered_sw_if_index, enable);
1550     }
1551 }
1552
1553 vnet_l3_packet_type_t
1554 vnet_link_to_l3_proto (vnet_link_t link)
1555 {
1556   switch (link)
1557     {
1558     case VNET_LINK_IP4:
1559       return (VNET_L3_PACKET_TYPE_IP4);
1560     case VNET_LINK_IP6:
1561       return (VNET_L3_PACKET_TYPE_IP6);
1562     case VNET_LINK_MPLS:
1563       return (VNET_L3_PACKET_TYPE_MPLS);
1564     case VNET_LINK_ARP:
1565       return (VNET_L3_PACKET_TYPE_ARP);
1566     case VNET_LINK_ETHERNET:
1567     case VNET_LINK_NSH:
1568       ASSERT (0);
1569       break;
1570     }
1571   ASSERT (0);
1572   return (0);
1573 }
1574
1575 vnet_mtu_t
1576 vnet_link_to_mtu (vnet_link_t link)
1577 {
1578   switch (link)
1579     {
1580     case VNET_LINK_IP4:
1581       return (VNET_MTU_IP4);
1582     case VNET_LINK_IP6:
1583       return (VNET_MTU_IP6);
1584     case VNET_LINK_MPLS:
1585       return (VNET_MTU_MPLS);
1586     default:
1587       return (VNET_MTU_L3);
1588     }
1589 }
1590
1591 u8 *
1592 default_build_rewrite (vnet_main_t * vnm,
1593                        u32 sw_if_index,
1594                        vnet_link_t link_type, const void *dst_address)
1595 {
1596   return (NULL);
1597 }
1598
1599 void
1600 default_update_adjacency (vnet_main_t * vnm, u32 sw_if_index, u32 ai)
1601 {
1602   ip_adjacency_t *adj;
1603
1604   adj = adj_get (ai);
1605
1606   switch (adj->lookup_next_index)
1607     {
1608     case IP_LOOKUP_NEXT_GLEAN:
1609       adj_glean_update_rewrite (ai);
1610       break;
1611     case IP_LOOKUP_NEXT_ARP:
1612       /*
1613        * default rewirte in neighbour adj
1614        */
1615       adj_nbr_update_rewrite
1616         (ai,
1617          ADJ_NBR_REWRITE_FLAG_COMPLETE,
1618          vnet_build_rewrite_for_sw_interface (vnm,
1619                                               sw_if_index,
1620                                               adj_get_link_type (ai), NULL));
1621       break;
1622     case IP_LOOKUP_NEXT_MCAST:
1623       /*
1624        * mcast traffic also uses default rewrite string with no mcast
1625        * switch time updates.
1626        */
1627       adj_mcast_update_rewrite
1628         (ai,
1629          vnet_build_rewrite_for_sw_interface (vnm,
1630                                               sw_if_index,
1631                                               adj_get_link_type (ai),
1632                                               NULL), 0);
1633       break;
1634     case IP_LOOKUP_NEXT_DROP:
1635     case IP_LOOKUP_NEXT_PUNT:
1636     case IP_LOOKUP_NEXT_LOCAL:
1637     case IP_LOOKUP_NEXT_REWRITE:
1638     case IP_LOOKUP_NEXT_MCAST_MIDCHAIN:
1639     case IP_LOOKUP_NEXT_MIDCHAIN:
1640     case IP_LOOKUP_NEXT_ICMP_ERROR:
1641     case IP_LOOKUP_N_NEXT:
1642       ASSERT (0);
1643       break;
1644     }
1645 }
1646
1647 int collect_detailed_interface_stats_flag = 0;
1648
1649 void
1650 collect_detailed_interface_stats_flag_set (void)
1651 {
1652   collect_detailed_interface_stats_flag = 1;
1653 }
1654
1655 void
1656 collect_detailed_interface_stats_flag_clear (void)
1657 {
1658   collect_detailed_interface_stats_flag = 0;
1659 }
1660
1661 static clib_error_t *
1662 collect_detailed_interface_stats_cli (vlib_main_t * vm,
1663                                       unformat_input_t * input,
1664                                       vlib_cli_command_t * cmd)
1665 {
1666   unformat_input_t _line_input, *line_input = &_line_input;
1667   clib_error_t *error = NULL;
1668
1669   /* Get a line of input. */
1670   if (!unformat_user (input, unformat_line_input, line_input))
1671     return clib_error_return (0, "expected enable | disable");
1672
1673   while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
1674     {
1675       if (unformat (line_input, "enable") || unformat (line_input, "on"))
1676         collect_detailed_interface_stats_flag_set ();
1677       else if (unformat (line_input, "disable")
1678                || unformat (line_input, "off"))
1679         collect_detailed_interface_stats_flag_clear ();
1680       else
1681         {
1682           error = clib_error_return (0, "unknown input `%U'",
1683                                      format_unformat_error, line_input);
1684           goto done;
1685         }
1686     }
1687
1688 done:
1689   unformat_free (line_input);
1690   return error;
1691 }
1692
1693 /* *INDENT-OFF* */
1694 VLIB_CLI_COMMAND (collect_detailed_interface_stats_command, static) = {
1695   .path = "interface collect detailed-stats",
1696   .short_help = "interface collect detailed-stats <enable|disable>",
1697   .function = collect_detailed_interface_stats_cli,
1698 };
1699 /* *INDENT-ON* */
1700
1701 /*
1702  * fd.io coding-style-patch-verification: ON
1703  *
1704  * Local Variables:
1705  * eval: (c-set-style "gnu")
1706  * End:
1707  */