fib: Don't use [midchain] adjacencies to change an interface's feature arc
[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/adj/adj.h>
43 #include <vnet/adj/adj_mcast.h>
44 #include <vnet/ip/ip.h>
45 #include <vnet/interface/rx_queue_funcs.h>
46 #include <vnet/interface/tx_queue_funcs.h>
47
48 /* *INDENT-OFF* */
49 VLIB_REGISTER_LOG_CLASS (if_default_log, static) = {
50   .class_name = "interface",
51 };
52 /* *INDENT-ON* */
53
54 #define log_debug(fmt,...) vlib_log_debug(if_default_log.class, fmt, __VA_ARGS__)
55 #define log_err(fmt,...) vlib_log_err(if_default_log.class, fmt, __VA_ARGS__)
56
57 typedef enum vnet_interface_helper_flags_t_
58 {
59   VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE = (1 << 0),
60   VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE = (1 << 1),
61 } vnet_interface_helper_flags_t;
62
63 static clib_error_t *vnet_hw_interface_set_flags_helper (vnet_main_t * vnm,
64                                                          u32 hw_if_index,
65                                                          vnet_hw_interface_flags_t
66                                                          flags,
67                                                          vnet_interface_helper_flags_t
68                                                          helper_flags);
69
70 static clib_error_t *vnet_sw_interface_set_flags_helper (vnet_main_t * vnm,
71                                                          u32 sw_if_index,
72                                                          vnet_sw_interface_flags_t
73                                                          flags,
74                                                          vnet_interface_helper_flags_t
75                                                          helper_flags);
76
77 static clib_error_t *vnet_hw_interface_set_class_helper (vnet_main_t * vnm,
78                                                          u32 hw_if_index,
79                                                          u32 hw_class_index,
80                                                          u32 redistribute);
81
82 typedef struct
83 {
84   /* Either sw or hw interface index. */
85   u32 sw_hw_if_index;
86
87   /* Flags. */
88   u32 flags;
89 } vnet_sw_hw_interface_state_t;
90
91 static void
92 serialize_vec_vnet_sw_hw_interface_state (serialize_main_t * m, va_list * va)
93 {
94   vnet_sw_hw_interface_state_t *s =
95     va_arg (*va, vnet_sw_hw_interface_state_t *);
96   u32 n = va_arg (*va, u32);
97   u32 i;
98   for (i = 0; i < n; i++)
99     {
100       serialize_integer (m, s[i].sw_hw_if_index,
101                          sizeof (s[i].sw_hw_if_index));
102       serialize_integer (m, s[i].flags, sizeof (s[i].flags));
103     }
104 }
105
106 static void
107 unserialize_vec_vnet_sw_hw_interface_state (serialize_main_t * m,
108                                             va_list * va)
109 {
110   vnet_sw_hw_interface_state_t *s =
111     va_arg (*va, vnet_sw_hw_interface_state_t *);
112   u32 n = va_arg (*va, u32);
113   u32 i;
114   for (i = 0; i < n; i++)
115     {
116       unserialize_integer (m, &s[i].sw_hw_if_index,
117                            sizeof (s[i].sw_hw_if_index));
118       unserialize_integer (m, &s[i].flags, sizeof (s[i].flags));
119     }
120 }
121
122 static vnet_sw_interface_flags_t
123 vnet_hw_interface_flags_to_sw (vnet_hw_interface_flags_t hwf)
124 {
125   vnet_sw_interface_flags_t swf = VNET_SW_INTERFACE_FLAG_NONE;
126
127   if (hwf & VNET_HW_INTERFACE_FLAG_LINK_UP)
128     swf |= VNET_SW_INTERFACE_FLAG_ADMIN_UP;
129
130   return (swf);
131 }
132
133 void
134 serialize_vnet_interface_state (serialize_main_t * m, va_list * va)
135 {
136   vnet_main_t *vnm = va_arg (*va, vnet_main_t *);
137   vnet_sw_hw_interface_state_t *sts = 0, *st;
138   vnet_sw_interface_t *sif;
139   vnet_hw_interface_t *hif;
140   vnet_interface_main_t *im = &vnm->interface_main;
141
142   /* Serialize hardware interface classes since they may have changed.
143      Must do this before sending up/down flags. */
144   /* *INDENT-OFF* */
145   pool_foreach (hif, im->hw_interfaces)  {
146     vnet_hw_interface_class_t * hw_class = vnet_get_hw_interface_class (vnm, hif->hw_class_index);
147     serialize_cstring (m, hw_class->name);
148   }
149   /* *INDENT-ON* */
150
151   /* Send sw/hw interface state when non-zero. */
152   /* *INDENT-OFF* */
153   pool_foreach (sif, im->sw_interfaces)  {
154     if (sif->flags != 0)
155       {
156         vec_add2 (sts, st, 1);
157         st->sw_hw_if_index = sif->sw_if_index;
158         st->flags = sif->flags;
159       }
160   }
161   /* *INDENT-ON* */
162
163   vec_serialize (m, sts, serialize_vec_vnet_sw_hw_interface_state);
164
165   if (sts)
166     _vec_len (sts) = 0;
167
168   /* *INDENT-OFF* */
169   pool_foreach (hif, im->hw_interfaces)  {
170     if (hif->flags != 0)
171       {
172         vec_add2 (sts, st, 1);
173         st->sw_hw_if_index = hif->hw_if_index;
174         st->flags = vnet_hw_interface_flags_to_sw(hif->flags);
175       }
176   }
177   /* *INDENT-ON* */
178
179   vec_serialize (m, sts, serialize_vec_vnet_sw_hw_interface_state);
180
181   vec_free (sts);
182 }
183
184 static vnet_hw_interface_flags_t
185 vnet_sw_interface_flags_to_hw (vnet_sw_interface_flags_t swf)
186 {
187   vnet_hw_interface_flags_t hwf = VNET_HW_INTERFACE_FLAG_NONE;
188
189   if (swf & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
190     hwf |= VNET_HW_INTERFACE_FLAG_LINK_UP;
191
192   return (hwf);
193 }
194
195 void
196 unserialize_vnet_interface_state (serialize_main_t * m, va_list * va)
197 {
198   vnet_main_t *vnm = va_arg (*va, vnet_main_t *);
199   vnet_sw_hw_interface_state_t *sts = 0, *st;
200
201   /* First set interface hardware class. */
202   {
203     vnet_interface_main_t *im = &vnm->interface_main;
204     vnet_hw_interface_t *hif;
205     char *class_name;
206     uword *p;
207     clib_error_t *error;
208
209     /* *INDENT-OFF* */
210     pool_foreach (hif, im->hw_interfaces)  {
211       unserialize_cstring (m, &class_name);
212       p = hash_get_mem (im->hw_interface_class_by_name, class_name);
213       if (p)
214         {
215           error = vnet_hw_interface_set_class_helper
216             (vnm, hif->hw_if_index, p[0], /* redistribute */ 0);
217         }
218       else
219         error = clib_error_return (0, "hw class %s AWOL?", class_name);
220
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   {
237     vnet_hw_interface_set_flags_helper
238       (vnm, st->sw_hw_if_index, vnet_sw_interface_flags_to_hw (st->flags),
239        /* no distribute */ 0);
240   }
241   vec_free (sts);
242 }
243
244 static clib_error_t *
245 call_elf_section_interface_callbacks (vnet_main_t * vnm, u32 if_index,
246                                       u32 flags,
247                                       _vnet_interface_function_list_elt_t **
248                                       elts)
249 {
250   _vnet_interface_function_list_elt_t *elt;
251   vnet_interface_function_priority_t prio;
252   clib_error_t *error = 0;
253
254   for (prio = VNET_ITF_FUNC_PRIORITY_LOW;
255        prio <= VNET_ITF_FUNC_PRIORITY_HIGH; prio++)
256     {
257       elt = elts[prio];
258
259       while (elt)
260         {
261           error = elt->fp (vnm, if_index, flags);
262           if (error)
263             return error;
264           elt = elt->next_interface_function;
265         }
266     }
267   return error;
268 }
269
270 static clib_error_t *
271 call_hw_interface_add_del_callbacks (vnet_main_t * vnm, u32 hw_if_index,
272                                      u32 is_create)
273 {
274   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
275   vnet_hw_interface_class_t *hw_class =
276     vnet_get_hw_interface_class (vnm, hi->hw_class_index);
277   vnet_device_class_t *dev_class =
278     vnet_get_device_class (vnm, hi->dev_class_index);
279   clib_error_t *error = 0;
280
281   if (hw_class->interface_add_del_function
282       && (error =
283           hw_class->interface_add_del_function (vnm, hw_if_index, is_create)))
284     return error;
285
286   if (dev_class->interface_add_del_function
287       && (error =
288           dev_class->interface_add_del_function (vnm, hw_if_index,
289                                                  is_create)))
290     return error;
291
292   error = call_elf_section_interface_callbacks
293     (vnm, hw_if_index, is_create, vnm->hw_interface_add_del_functions);
294
295   return error;
296 }
297
298 static clib_error_t *
299 call_sw_interface_add_del_callbacks (vnet_main_t * vnm, u32 sw_if_index,
300                                      u32 is_create)
301 {
302   return call_elf_section_interface_callbacks
303     (vnm, sw_if_index, is_create, vnm->sw_interface_add_del_functions);
304 }
305
306 static clib_error_t *
307 vnet_hw_interface_set_flags_helper (vnet_main_t * vnm, u32 hw_if_index,
308                                     vnet_hw_interface_flags_t flags,
309                                     vnet_interface_helper_flags_t
310                                     helper_flags)
311 {
312   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
313   vnet_hw_interface_class_t *hw_class =
314     vnet_get_hw_interface_class (vnm, hi->hw_class_index);
315   u32 mask;
316   clib_error_t *error = 0;
317   u32 is_create =
318     (helper_flags & VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE) != 0;
319
320   mask =
321     (VNET_HW_INTERFACE_FLAG_LINK_UP | VNET_HW_INTERFACE_FLAG_DUPLEX_MASK);
322   flags &= mask;
323
324   /* Call hardware interface add/del callbacks. */
325   if (is_create)
326     call_hw_interface_add_del_callbacks (vnm, hw_if_index, is_create);
327
328   /* Already in the desired state? */
329   if (!is_create && (hi->flags & mask) == flags)
330     goto done;
331
332   if ((hi->flags & VNET_HW_INTERFACE_FLAG_LINK_UP) !=
333       (flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
334     {
335       /* Do hardware class (e.g. ethernet). */
336       if (hw_class->link_up_down_function
337           && (error = hw_class->link_up_down_function (vnm, hw_if_index,
338                                                        flags)))
339         goto done;
340
341       error = call_elf_section_interface_callbacks
342         (vnm, hw_if_index, flags, vnm->hw_interface_link_up_down_functions);
343
344       if (error)
345         goto done;
346     }
347
348   hi->flags &= ~mask;
349   hi->flags |= flags;
350
351 done:
352   if (error)
353     log_err ("hw_set_flags_helper: %U", format_clib_error, error);
354   return error;
355 }
356
357 static clib_error_t *
358 vnet_sw_interface_set_flags_helper (vnet_main_t * vnm, u32 sw_if_index,
359                                     vnet_sw_interface_flags_t flags,
360                                     vnet_interface_helper_flags_t
361                                     helper_flags)
362 {
363   vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
364   u32 mask;
365   clib_error_t *error = 0;
366   u32 is_create =
367     (helper_flags & VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE) != 0;
368   u32 old_flags;
369
370   mask = VNET_SW_INTERFACE_FLAG_ADMIN_UP | VNET_SW_INTERFACE_FLAG_PUNT;
371   flags &= mask;
372
373   if (is_create)
374     {
375       error =
376         call_sw_interface_add_del_callbacks (vnm, sw_if_index, is_create);
377       if (error)
378         goto done;
379
380       if (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
381         {
382           /* Notify everyone when the interface is created as admin up */
383           error = call_elf_section_interface_callbacks (vnm, sw_if_index,
384                                                         flags,
385                                                         vnm->
386                                                         sw_interface_admin_up_down_functions);
387           if (error)
388             goto done;
389         }
390     }
391   else
392     {
393       vnet_sw_interface_t *si_sup = si;
394
395       /* Check that super interface is in correct state. */
396       if (si->type == VNET_SW_INTERFACE_TYPE_SUB)
397         {
398           si_sup = vnet_get_sw_interface (vnm, si->sup_sw_if_index);
399
400           /* Check to see if we're bringing down the soft interface and if it's parent is up */
401           if ((flags != (si_sup->flags & mask)) &&
402               (!((flags == 0)
403                  && ((si_sup->flags & mask) ==
404                      VNET_SW_INTERFACE_FLAG_ADMIN_UP))))
405             {
406               error = clib_error_return (0, "super-interface %U must be %U",
407                                          format_vnet_sw_interface_name, vnm,
408                                          si_sup,
409                                          format_vnet_sw_interface_flags,
410                                          flags);
411               goto done;
412             }
413         }
414
415       /* Already in the desired state? */
416       if ((si->flags & mask) == flags)
417         goto done;
418
419       /* Sub-interfaces of hardware interfaces that do no redistribute,
420          do not redistribute themselves. */
421       if (si_sup->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
422         {
423           vnet_hw_interface_t *hi =
424             vnet_get_hw_interface (vnm, si_sup->hw_if_index);
425           vnet_device_class_t *dev_class =
426             vnet_get_device_class (vnm, hi->dev_class_index);
427           if (!dev_class->redistribute)
428             helper_flags &=
429               ~VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE;
430         }
431
432       /* set the flags now before invoking the registered clients
433        * so that the state they query is consistent with the state here notified */
434       old_flags = si->flags;
435       si->flags &= ~mask;
436       si->flags |= flags;
437       if ((flags | old_flags) & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
438         error = call_elf_section_interface_callbacks
439           (vnm, sw_if_index, flags,
440            vnm->sw_interface_admin_up_down_functions);
441
442       if (error)
443         {
444           /* restore flags on error */
445           si->flags = old_flags;
446           goto done;
447         }
448
449       if (si->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
450         {
451           vnet_hw_interface_t *hi =
452             vnet_get_hw_interface (vnm, si->hw_if_index);
453           vnet_hw_interface_class_t *hw_class =
454             vnet_get_hw_interface_class (vnm, hi->hw_class_index);
455           vnet_device_class_t *dev_class =
456             vnet_get_device_class (vnm, hi->dev_class_index);
457
458           if ((flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) &&
459               (si->flags & VNET_SW_INTERFACE_FLAG_ERROR))
460             {
461               error = clib_error_return (0, "Interface in the error state");
462               goto done;
463             }
464
465           /* update si admin up flag in advance if we are going admin down */
466           if (!(flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
467             si->flags &= ~VNET_SW_INTERFACE_FLAG_ADMIN_UP;
468
469           if (dev_class->admin_up_down_function
470               && (error = dev_class->admin_up_down_function (vnm,
471                                                              si->hw_if_index,
472                                                              flags)))
473             {
474               /* restore si admin up flag to it's original state on errors */
475               si->flags = old_flags;
476               goto done;
477             }
478
479           if (hw_class->admin_up_down_function
480               && (error = hw_class->admin_up_down_function (vnm,
481                                                             si->hw_if_index,
482                                                             flags)))
483             {
484               /* restore si admin up flag to it's original state on errors */
485               si->flags = old_flags;
486               goto done;
487             }
488
489           /* Admin down implies link down. */
490           if (!(flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
491               && (hi->flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
492             vnet_hw_interface_set_flags_helper (vnm, si->hw_if_index,
493                                                 hi->flags &
494                                                 ~VNET_HW_INTERFACE_FLAG_LINK_UP,
495                                                 helper_flags);
496           vnet_hw_if_update_runtime_data (vnm, si->hw_if_index);
497         }
498     }
499
500   si->flags &= ~mask;
501   si->flags |= flags;
502
503 done:
504   if (error)
505     log_err ("sw_set_flags_helper: %U", format_clib_error, error);
506   return error;
507 }
508
509 clib_error_t *
510 vnet_hw_interface_set_flags (vnet_main_t * vnm, u32 hw_if_index,
511                              vnet_hw_interface_flags_t flags)
512 {
513   log_debug ("hw_set_flags: hw_if_index %u flags 0x%x", hw_if_index, flags);
514   return vnet_hw_interface_set_flags_helper
515     (vnm, hw_if_index, flags,
516      VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE);
517 }
518
519 clib_error_t *
520 vnet_sw_interface_set_flags (vnet_main_t * vnm, u32 sw_if_index,
521                              vnet_sw_interface_flags_t flags)
522 {
523   log_debug ("sw_set_flags: sw_if_index %u flags 0x%x", sw_if_index, flags);
524   return vnet_sw_interface_set_flags_helper
525     (vnm, sw_if_index, flags,
526      VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE);
527 }
528
529 void
530 vnet_sw_interface_admin_up (vnet_main_t * vnm, u32 sw_if_index)
531 {
532   u32 flags = vnet_sw_interface_get_flags (vnm, sw_if_index);
533   log_debug ("sw_admin_up: sw_if_index %u", sw_if_index);
534
535   if (!(flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
536     {
537       flags |= VNET_SW_INTERFACE_FLAG_ADMIN_UP;
538       vnet_sw_interface_set_flags (vnm, sw_if_index, flags);
539     }
540 }
541
542 void
543 vnet_sw_interface_admin_down (vnet_main_t * vnm, u32 sw_if_index)
544 {
545   u32 flags = vnet_sw_interface_get_flags (vnm, sw_if_index);
546   log_debug ("sw_admin_down: sw_if_index %u", sw_if_index);
547
548   if (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
549     {
550       flags &= ~(VNET_SW_INTERFACE_FLAG_ADMIN_UP);
551       vnet_sw_interface_set_flags (vnm, sw_if_index, flags);
552     }
553 }
554
555 static void
556 vnet_if_update_lookup_tables (vnet_main_t *vnm, u32 sw_if_index)
557 {
558   vnet_interface_main_t *im = &vnm->interface_main;
559   vnet_hw_interface_t *hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
560
561   vec_validate_init_empty (im->hw_if_index_by_sw_if_index, sw_if_index, ~0);
562   vec_validate_init_empty (im->if_out_arc_end_next_index_by_sw_if_index,
563                            sw_if_index, ~0);
564
565   im->hw_if_index_by_sw_if_index[sw_if_index] = hi->hw_if_index;
566   im->if_out_arc_end_next_index_by_sw_if_index[sw_if_index] =
567     hi->if_out_arc_end_node_next_index;
568 }
569
570 static u32
571 vnet_create_sw_interface_no_callbacks (vnet_main_t * vnm,
572                                        vnet_sw_interface_t * template)
573 {
574   vnet_interface_main_t *im = &vnm->interface_main;
575   vnet_sw_interface_t *sw;
576   u32 sw_if_index;
577
578   pool_get (im->sw_interfaces, sw);
579   sw_if_index = sw - im->sw_interfaces;
580
581   sw[0] = template[0];
582
583   sw->flags = 0;
584   sw->sw_if_index = sw_if_index;
585   if (sw->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
586     sw->sup_sw_if_index = sw->sw_if_index;
587
588   /* Allocate counters for this interface. */
589   {
590     u32 i;
591
592     vnet_interface_counter_lock (im);
593
594     for (i = 0; i < vec_len (im->sw_if_counters); i++)
595       {
596         vlib_validate_simple_counter (&im->sw_if_counters[i], sw_if_index);
597         vlib_zero_simple_counter (&im->sw_if_counters[i], sw_if_index);
598       }
599
600     for (i = 0; i < vec_len (im->combined_sw_if_counters); i++)
601       {
602         vlib_validate_combined_counter (&im->combined_sw_if_counters[i],
603                                         sw_if_index);
604         vlib_zero_combined_counter (&im->combined_sw_if_counters[i],
605                                     sw_if_index);
606       }
607
608     vnet_interface_counter_unlock (im);
609   }
610
611   vnet_if_update_lookup_tables (vnm, sw_if_index);
612   return sw_if_index;
613 }
614
615 clib_error_t *
616 vnet_create_sw_interface (vnet_main_t * vnm, vnet_sw_interface_t * template,
617                           u32 * sw_if_index)
618 {
619   vnet_interface_main_t *im = &vnm->interface_main;
620   clib_error_t *error;
621   vnet_hw_interface_t *hi;
622   vnet_device_class_t *dev_class;
623
624   if (template->sub.eth.flags.two_tags == 1
625       && template->sub.eth.flags.exact_match == 1
626       && (template->sub.eth.flags.inner_vlan_id_any == 1
627           || template->sub.eth.flags.outer_vlan_id_any == 1))
628     {
629       char *str = "inner-dot1q any exact-match is unsupported";
630       error = clib_error_return (0, str);
631       log_err ("create_sw_interface: %s", str);
632       return error;
633     }
634
635   hi = vnet_get_sup_hw_interface (vnm, template->sup_sw_if_index);
636   dev_class = vnet_get_device_class (vnm, hi->dev_class_index);
637
638   if (template->type == VNET_SW_INTERFACE_TYPE_SUB &&
639       dev_class->subif_add_del_function)
640     {
641       error = dev_class->subif_add_del_function (vnm, hi->hw_if_index,
642                                                  (struct vnet_sw_interface_t
643                                                   *) template, 1);
644       if (error)
645         return error;
646     }
647
648   *sw_if_index = vnet_create_sw_interface_no_callbacks (vnm, template);
649   error = vnet_sw_interface_set_flags_helper
650     (vnm, *sw_if_index, template->flags,
651      VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE);
652
653   if (error)
654     {
655       /* undo the work done by vnet_create_sw_interface_no_callbacks() */
656       log_err ("create_sw_interface: set flags failed\n  %U",
657                format_clib_error, error);
658       vnet_sw_interface_t *sw =
659         pool_elt_at_index (im->sw_interfaces, *sw_if_index);
660       pool_put (im->sw_interfaces, sw);
661     }
662   else
663     {
664       vnet_sw_interface_t *sw =
665         pool_elt_at_index (im->sw_interfaces, *sw_if_index);
666       log_debug ("create_sw_interface: interface %U (sw_if_index %u) created",
667                  format_vnet_sw_interface_name, vnm, sw, *sw_if_index);
668     }
669
670   return error;
671 }
672
673 void
674 vnet_delete_sw_interface (vnet_main_t * vnm, u32 sw_if_index)
675 {
676   vnet_interface_main_t *im = &vnm->interface_main;
677   vnet_sw_interface_t *sw =
678     pool_elt_at_index (im->sw_interfaces, sw_if_index);
679
680   log_debug ("delete_sw_interface: sw_if_index %u, name '%U'",
681              sw_if_index, format_vnet_sw_if_index_name, vnm, sw_if_index);
682
683   /* Check if the interface has config and is removed from L2 BD or XConnect */
684   vnet_clear_sw_interface_tag (vnm, sw_if_index);
685
686   /* Bring down interface in case it is up. */
687   if (sw->flags != 0)
688     vnet_sw_interface_set_flags (vnm, sw_if_index, /* flags */ 0);
689
690   call_sw_interface_add_del_callbacks (vnm, sw_if_index, /* is_create */ 0);
691
692   pool_put (im->sw_interfaces, sw);
693 }
694
695 static clib_error_t *
696 call_sw_interface_mtu_change_callbacks (vnet_main_t * vnm, u32 sw_if_index)
697 {
698   return call_elf_section_interface_callbacks
699     (vnm, sw_if_index, 0, vnm->sw_interface_mtu_change_functions);
700 }
701
702 void
703 vnet_sw_interface_set_mtu (vnet_main_t * vnm, u32 sw_if_index, u32 mtu)
704 {
705   vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
706
707   if (si->mtu[VNET_MTU_L3] != mtu)
708     {
709       si->mtu[VNET_MTU_L3] = mtu;
710       log_debug ("set_mtu: interface %U, new mtu %u",
711                  format_vnet_sw_if_index_name, vnm, sw_if_index, mtu);
712
713       call_sw_interface_mtu_change_callbacks (vnm, sw_if_index);
714     }
715 }
716
717 void
718 vnet_sw_interface_set_protocol_mtu (vnet_main_t * vnm, u32 sw_if_index,
719                                     u32 mtu[])
720 {
721   vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
722   bool changed = false;
723   int i;
724
725   for (i = 0; i < VNET_N_MTU; i++)
726     {
727       if (si->mtu[i] != mtu[i])
728         {
729           si->mtu[i] = mtu[i];
730           changed = true;
731         }
732     }
733   /* Notify interested parties */
734   if (changed)
735     {
736       log_debug ("set_protocol_mtu: interface %U l3 %u ip4 %u ip6 %u mpls %u",
737                  format_vnet_sw_if_index_name, vnm, sw_if_index,
738                  mtu[VNET_MTU_L3], mtu[VNET_MTU_IP4], mtu[VNET_MTU_IP6],
739                  mtu[VNET_MTU_MPLS]);
740       call_sw_interface_mtu_change_callbacks (vnm, sw_if_index);
741     }
742 }
743
744 void
745 vnet_sw_interface_ip_directed_broadcast (vnet_main_t * vnm,
746                                          u32 sw_if_index, u8 enable)
747 {
748   vnet_sw_interface_t *si;
749
750   si = vnet_get_sw_interface (vnm, sw_if_index);
751
752   if (enable)
753     si->flags |= VNET_SW_INTERFACE_FLAG_DIRECTED_BCAST;
754   else
755     si->flags &= ~VNET_SW_INTERFACE_FLAG_DIRECTED_BCAST;
756
757   ip4_directed_broadcast (sw_if_index, enable);
758 }
759
760 /*
761  * Reflect a change in hardware MTU on protocol MTUs
762  */
763 static walk_rc_t
764 sw_interface_walk_callback (vnet_main_t * vnm, u32 sw_if_index, void *ctx)
765 {
766   u32 *link_mtu = ctx;
767   vnet_sw_interface_set_mtu (vnm, sw_if_index, *link_mtu);
768   return WALK_CONTINUE;
769 }
770
771 void
772 vnet_hw_interface_set_mtu (vnet_main_t * vnm, u32 hw_if_index, u32 mtu)
773 {
774   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
775
776   if (hi->max_packet_bytes != mtu)
777     {
778       hi->max_packet_bytes = mtu;
779       ethernet_set_flags (vnm, hw_if_index, ETHERNET_INTERFACE_FLAG_MTU);
780       vnet_hw_interface_walk_sw (vnm, hw_if_index, sw_interface_walk_callback,
781                                  &mtu);
782     }
783 }
784
785 static void
786 setup_tx_node (vlib_main_t * vm,
787                u32 node_index, vnet_device_class_t * dev_class)
788 {
789   vlib_node_t *n = vlib_get_node (vm, node_index);
790
791   n->format_trace = dev_class->format_tx_trace;
792
793   vlib_register_errors (vm, node_index, dev_class->tx_function_n_errors,
794                         dev_class->tx_function_error_strings,
795                         dev_class->tx_function_error_counters);
796 }
797
798 static void
799 setup_output_node (vlib_main_t * vm,
800                    u32 node_index, vnet_hw_interface_class_t * hw_class)
801 {
802   vlib_node_t *n = vlib_get_node (vm, node_index);
803   n->format_buffer = hw_class->format_header;
804   n->unformat_buffer = hw_class->unformat_header;
805 }
806
807 void
808 vnet_reset_interface_l3_output_node (vlib_main_t *vm, u32 sw_if_index)
809 {
810   vnet_set_interface_l3_output_node (vm, sw_if_index,
811                                      (u8 *) "interface-output");
812 }
813
814 void
815 vnet_set_interface_l3_output_node (vlib_main_t *vm, u32 sw_if_index,
816                                    u8 *output_node)
817 {
818   vlib_node_t *l3_node;
819
820   l3_node = vlib_get_node_by_name (vm, output_node);
821
822   static char *arcs[] = {
823     "ip4-output",
824     "ip6-output",
825     "mpls-output",
826     "ethernet-output",
827   };
828   u8 a;
829
830   for (a = 0; a < ARRAY_LEN (arcs); a++)
831     {
832       u8 arc = vnet_get_feature_arc_index (arcs[a]);
833       vnet_feature_modify_end_node (arc, sw_if_index, l3_node->index);
834     }
835 }
836
837 /* Register an interface instance. */
838 u32
839 vnet_register_interface (vnet_main_t * vnm,
840                          u32 dev_class_index,
841                          u32 dev_instance,
842                          u32 hw_class_index, u32 hw_instance)
843 {
844   vnet_interface_main_t *im = &vnm->interface_main;
845   vnet_hw_interface_t *hw;
846   vnet_device_class_t *dev_class =
847     vnet_get_device_class (vnm, dev_class_index);
848   vnet_hw_interface_class_t *hw_class =
849     vnet_get_hw_interface_class (vnm, hw_class_index);
850   vlib_main_t *vm = vnm->vlib_main;
851   vnet_feature_config_main_t *fcm;
852   vnet_config_main_t *cm;
853   u32 hw_index, i;
854   char *tx_node_name = NULL, *output_node_name = NULL;
855   vlib_node_t *if_out_node =
856     vlib_get_node (vm, vnet_interface_output_node.index);
857
858   pool_get (im->hw_interfaces, hw);
859   clib_memset (hw, 0, sizeof (*hw));
860   hw->trace_classify_table_index = ~0;
861
862   hw_index = hw - im->hw_interfaces;
863   hw->hw_if_index = hw_index;
864   hw->default_rx_mode = VNET_HW_IF_RX_MODE_POLLING;
865
866   if (dev_class->format_device_name)
867     hw->name = format (0, "%U", dev_class->format_device_name, dev_instance);
868   else if (hw_class->format_interface_name)
869     hw->name = format (0, "%U", hw_class->format_interface_name,
870                        dev_instance);
871   else
872     hw->name = format (0, "%s%x", hw_class->name, dev_instance);
873
874   if (!im->hw_interface_by_name)
875     im->hw_interface_by_name = hash_create_vec ( /* size */ 0,
876                                                 sizeof (hw->name[0]),
877                                                 sizeof (uword));
878
879   hash_set_mem (im->hw_interface_by_name, hw->name, hw_index);
880
881   /* Make hardware interface point to software interface. */
882   {
883     vnet_sw_interface_t sw = {
884       .type = VNET_SW_INTERFACE_TYPE_HARDWARE,
885       .flood_class = VNET_FLOOD_CLASS_NORMAL,
886       .hw_if_index = hw_index
887     };
888     hw->sw_if_index = vnet_create_sw_interface_no_callbacks (vnm, &sw);
889   }
890
891   hw->dev_class_index = dev_class_index;
892   hw->dev_instance = dev_instance;
893   hw->hw_class_index = hw_class_index;
894   hw->hw_instance = hw_instance;
895
896   hw->max_rate_bits_per_sec = 0;
897   hw->min_packet_bytes = 0;
898   vnet_sw_interface_set_mtu (vnm, hw->sw_if_index, 0);
899
900   if (dev_class->tx_function == 0 && dev_class->tx_fn_registrations == 0)
901     goto no_output_nodes;       /* No output/tx nodes to create */
902
903   tx_node_name = (char *) format (0, "%v-tx", hw->name);
904   output_node_name = (char *) format (0, "%v-output", hw->name);
905
906   /* If we have previously deleted interface nodes, re-use them. */
907   if (vec_len (im->deleted_hw_interface_nodes) > 0)
908     {
909       vnet_hw_interface_nodes_t *hn;
910       vlib_node_t *node;
911       vlib_node_runtime_t *nrt;
912
913       hn = vec_end (im->deleted_hw_interface_nodes) - 1;
914
915       hw->tx_node_index = hn->tx_node_index;
916       hw->output_node_index = hn->output_node_index;
917
918       vlib_node_rename (vm, hw->tx_node_index, "%v", tx_node_name);
919       vlib_node_rename (vm, hw->output_node_index, "%v", output_node_name);
920
921       foreach_vlib_main ()
922         {
923           vnet_interface_output_runtime_t *rt;
924
925           rt =
926             vlib_node_get_runtime_data (this_vlib_main, hw->output_node_index);
927           ASSERT (rt->is_deleted == 1);
928           rt->is_deleted = 0;
929           rt->hw_if_index = hw_index;
930           rt->sw_if_index = hw->sw_if_index;
931           rt->dev_instance = hw->dev_instance;
932
933           rt = vlib_node_get_runtime_data (this_vlib_main, hw->tx_node_index);
934           rt->hw_if_index = hw_index;
935           rt->sw_if_index = hw->sw_if_index;
936           rt->dev_instance = hw->dev_instance;
937         }
938
939       /* The new class may differ from the old one.
940        * Functions have to be updated. */
941       node = vlib_get_node (vm, hw->output_node_index);
942       node->format_trace = format_vnet_interface_output_trace;
943       node->node_fn_registrations = if_out_node->node_fn_registrations;
944       node->function = if_out_node->function;
945
946       foreach_vlib_main ()
947         {
948           nrt = vlib_node_get_runtime (this_vlib_main, hw->output_node_index);
949           nrt->function = node->function;
950           vlib_node_runtime_perf_counter (this_vlib_main, nrt, 0, 0, 0,
951                                           VLIB_NODE_RUNTIME_PERF_RESET);
952         }
953
954       node = vlib_get_node (vm, hw->tx_node_index);
955       if (dev_class->tx_fn_registrations)
956         {
957           node->node_fn_registrations = dev_class->tx_fn_registrations;
958           node->function = vlib_node_get_preferred_node_fn_variant (
959             vm, dev_class->tx_fn_registrations);
960         }
961       else
962         node->function = dev_class->tx_function;
963       node->format_trace = dev_class->format_tx_trace;
964
965       foreach_vlib_main ()
966         {
967           nrt = vlib_node_get_runtime (this_vlib_main, hw->tx_node_index);
968           nrt->function = node->function;
969           vlib_node_runtime_perf_counter (this_vlib_main, nrt, 0, 0, 0,
970                                           VLIB_NODE_RUNTIME_PERF_RESET);
971         }
972
973       _vec_len (im->deleted_hw_interface_nodes) -= 1;
974     }
975   else
976     {
977       vlib_node_registration_t r;
978       vnet_interface_output_runtime_t rt = {
979         .hw_if_index = hw_index,
980         .sw_if_index = hw->sw_if_index,
981         .dev_instance = hw->dev_instance,
982         .is_deleted = 0,
983       };
984
985       clib_memset (&r, 0, sizeof (r));
986       r.type = VLIB_NODE_TYPE_INTERNAL;
987       r.runtime_data = &rt;
988       r.runtime_data_bytes = sizeof (rt);
989       r.scalar_size = sizeof (vnet_hw_if_tx_frame_t);
990       r.vector_size = sizeof (u32);
991
992       r.flags = VLIB_NODE_FLAG_IS_OUTPUT;
993       r.name = tx_node_name;
994       if (dev_class->tx_fn_registrations)
995         {
996           r.function = 0;
997           r.node_fn_registrations = dev_class->tx_fn_registrations;
998         }
999       else
1000         r.function = dev_class->tx_function;
1001
1002       hw->tx_node_index = vlib_register_node (vm, &r);
1003
1004       vlib_node_add_named_next_with_slot (vm, hw->tx_node_index,
1005                                           "error-drop",
1006                                           VNET_INTERFACE_TX_NEXT_DROP);
1007
1008       r.flags = 0;
1009       r.name = output_node_name;
1010       r.format_trace = format_vnet_interface_output_trace;
1011       if (if_out_node->node_fn_registrations)
1012         {
1013           r.function = 0;
1014           r.node_fn_registrations = if_out_node->node_fn_registrations;
1015         }
1016       else
1017         r.function = if_out_node->function;
1018
1019       {
1020         static char *e[] = {
1021           "interface is down",
1022           "interface is deleted",
1023         };
1024
1025         r.n_errors = ARRAY_LEN (e);
1026         r.error_strings = e;
1027       }
1028       hw->output_node_index = vlib_register_node (vm, &r);
1029
1030       vlib_node_add_named_next_with_slot (vm, hw->output_node_index,
1031                                           "error-drop",
1032                                           VNET_INTERFACE_OUTPUT_NEXT_DROP);
1033       vlib_node_add_next_with_slot (vm, hw->output_node_index,
1034                                     hw->tx_node_index,
1035                                     VNET_INTERFACE_OUTPUT_NEXT_TX);
1036       /* add interface to the list of "output-interface" feature arc start nodes
1037          and clone nexts from 1st interface if it exists */
1038       fcm = vnet_feature_get_config_main (im->output_feature_arc_index);
1039       cm = &fcm->config_main;
1040       i = vec_len (cm->start_node_indices);
1041       vec_validate (cm->start_node_indices, i);
1042       cm->start_node_indices[i] = hw->output_node_index;
1043       if (hw_index)
1044         {
1045           /* copy nexts from 1st interface */
1046           vnet_hw_interface_t *first_hw;
1047           vlib_node_t *first_node;
1048
1049           first_hw = vnet_get_hw_interface (vnm, /* hw_if_index */ 0);
1050           first_node = vlib_get_node (vm, first_hw->output_node_index);
1051
1052           /* 1st 2 nexts are already added above */
1053           for (i = 2; i < vec_len (first_node->next_nodes); i++)
1054             vlib_node_add_next_with_slot (vm, hw->output_node_index,
1055                                           first_node->next_nodes[i], i);
1056         }
1057     }
1058
1059   hw->if_out_arc_end_node_next_index = vlib_node_add_next (
1060     vm, vnet_interface_output_arc_end_node.index, hw->tx_node_index);
1061   vnet_if_update_lookup_tables (vnm, hw->sw_if_index);
1062   setup_output_node (vm, hw->output_node_index, hw_class);
1063   setup_tx_node (vm, hw->tx_node_index, dev_class);
1064
1065 no_output_nodes:
1066   /* Call all up/down callbacks with zero flags when interface is created. */
1067   vnet_sw_interface_set_flags_helper (vnm, hw->sw_if_index, /* flags */ 0,
1068                                       VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE);
1069   vnet_hw_interface_set_flags_helper (vnm, hw_index, /* flags */ 0,
1070                                       VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE);
1071   vec_free (tx_node_name);
1072   vec_free (output_node_name);
1073
1074   return hw_index;
1075 }
1076
1077 void
1078 vnet_delete_hw_interface (vnet_main_t * vnm, u32 hw_if_index)
1079 {
1080   vnet_interface_main_t *im = &vnm->interface_main;
1081   vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
1082   vlib_main_t *vm = vnm->vlib_main;
1083   vnet_device_class_t *dev_class = vnet_get_device_class (vnm,
1084                                                           hw->dev_class_index);
1085   /* If it is up, mark it down. */
1086   if (hw->flags != 0)
1087     vnet_hw_interface_set_flags (vnm, hw_if_index, /* flags */ 0);
1088
1089   /* Call delete callbacks. */
1090   call_hw_interface_add_del_callbacks (vnm, hw_if_index, /* is_create */ 0);
1091
1092   /* delete rx & tx queues */
1093   vnet_hw_if_unregister_all_rx_queues (vnm, hw_if_index);
1094   vnet_hw_if_unregister_all_tx_queues (vnm, hw_if_index);
1095   vnet_hw_if_update_runtime_data (vnm, hw_if_index);
1096
1097   /* Delete any sub-interfaces. */
1098   {
1099     u32 id, sw_if_index;
1100     /* *INDENT-OFF* */
1101     hash_foreach (id, sw_if_index, hw->sub_interface_sw_if_index_by_id,
1102     ({
1103       vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
1104       u64 sup_and_sub_key =
1105         ((u64) (si->sup_sw_if_index) << 32) | (u64) si->sub.id;
1106       hash_unset_mem_free (&im->sw_if_index_by_sup_and_sub, &sup_and_sub_key);
1107       vnet_delete_sw_interface (vnm, sw_if_index);
1108     }));
1109     hash_free (hw->sub_interface_sw_if_index_by_id);
1110     /* *INDENT-ON* */
1111   }
1112
1113   /* Delete software interface corresponding to hardware interface. */
1114   vnet_delete_sw_interface (vnm, hw->sw_if_index);
1115
1116   if (dev_class->tx_function)
1117     {
1118       /* Put output/tx nodes into recycle pool */
1119       vnet_hw_interface_nodes_t *dn;
1120
1121       foreach_vlib_main ()
1122         {
1123           vnet_interface_output_runtime_t *rt =
1124             vlib_node_get_runtime_data (this_vlib_main, hw->output_node_index);
1125
1126           /* Mark node runtime as deleted so output node (if called)
1127            * will drop packets. */
1128           rt->is_deleted = 1;
1129         }
1130
1131       vlib_node_rename (vm, hw->output_node_index,
1132                         "interface-%d-output-deleted", hw_if_index);
1133       vlib_node_rename (vm, hw->tx_node_index, "interface-%d-tx-deleted",
1134                         hw_if_index);
1135       vec_add2 (im->deleted_hw_interface_nodes, dn, 1);
1136       dn->tx_node_index = hw->tx_node_index;
1137       dn->output_node_index = hw->output_node_index;
1138     }
1139   hash_unset_mem (im->hw_interface_by_name, hw->name);
1140   vec_free (hw->name);
1141   vec_free (hw->hw_address);
1142   vec_free (hw->output_node_thread_runtimes);
1143   pool_put (im->hw_interfaces, hw);
1144 }
1145
1146 void
1147 vnet_hw_interface_walk_sw (vnet_main_t * vnm,
1148                            u32 hw_if_index,
1149                            vnet_hw_sw_interface_walk_t fn, void *ctx)
1150 {
1151   vnet_hw_interface_t *hi;
1152   u32 id, sw_if_index;
1153
1154   hi = vnet_get_hw_interface (vnm, hw_if_index);
1155   /* the super first, then the sub interfaces */
1156   if (WALK_STOP == fn (vnm, hi->sw_if_index, ctx))
1157     return;
1158
1159   /* *INDENT-OFF* */
1160   hash_foreach (id, sw_if_index,
1161                 hi->sub_interface_sw_if_index_by_id,
1162   ({
1163     if (WALK_STOP == fn (vnm, sw_if_index, ctx))
1164       break;
1165   }));
1166   /* *INDENT-ON* */
1167 }
1168
1169 void
1170 vnet_hw_interface_walk (vnet_main_t * vnm,
1171                         vnet_hw_interface_walk_t fn, void *ctx)
1172 {
1173   vnet_interface_main_t *im;
1174   vnet_hw_interface_t *hi;
1175
1176   im = &vnm->interface_main;
1177
1178   /* *INDENT-OFF* */
1179   pool_foreach (hi, im->hw_interfaces)
1180    {
1181     if (WALK_STOP == fn(vnm, hi->hw_if_index, ctx))
1182       break;
1183   }
1184   /* *INDENT-ON* */
1185 }
1186
1187 void
1188 vnet_sw_interface_walk (vnet_main_t * vnm,
1189                         vnet_sw_interface_walk_t fn, void *ctx)
1190 {
1191   vnet_interface_main_t *im;
1192   vnet_sw_interface_t *si;
1193
1194   im = &vnm->interface_main;
1195
1196   /* *INDENT-OFF* */
1197   pool_foreach (si, im->sw_interfaces)
1198   {
1199     if (WALK_STOP == fn (vnm, si, ctx))
1200       break;
1201   }
1202   /* *INDENT-ON* */
1203 }
1204
1205 void
1206 vnet_hw_interface_init_for_class (vnet_main_t * vnm, u32 hw_if_index,
1207                                   u32 hw_class_index, u32 hw_instance)
1208 {
1209   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1210   vnet_hw_interface_class_t *hc =
1211     vnet_get_hw_interface_class (vnm, hw_class_index);
1212
1213   hi->hw_class_index = hw_class_index;
1214   hi->hw_instance = hw_instance;
1215   setup_output_node (vnm->vlib_main, hi->output_node_index, hc);
1216 }
1217
1218 static clib_error_t *
1219 vnet_hw_interface_set_class_helper (vnet_main_t * vnm, u32 hw_if_index,
1220                                     u32 hw_class_index, u32 redistribute)
1221 {
1222   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1223   vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, hi->sw_if_index);
1224   vnet_hw_interface_class_t *old_class =
1225     vnet_get_hw_interface_class (vnm, hi->hw_class_index);
1226   vnet_hw_interface_class_t *new_class =
1227     vnet_get_hw_interface_class (vnm, hw_class_index);
1228   vnet_device_class_t *dev_class =
1229     vnet_get_device_class (vnm, hi->dev_class_index);
1230   clib_error_t *error = 0;
1231
1232   /* New class equals old class?  Nothing to do. */
1233   if (hi->hw_class_index == hw_class_index)
1234     return 0;
1235
1236   /* No need (and incorrect since admin up flag may be set) to do error checking when
1237      receiving unserialize message. */
1238   if (redistribute)
1239     {
1240       if (si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
1241         return clib_error_return (0,
1242                                   "%v must be admin down to change class from %s to %s",
1243                                   hi->name, old_class->name, new_class->name);
1244
1245       /* Make sure interface supports given class. */
1246       if ((new_class->is_valid_class_for_interface
1247            && !new_class->is_valid_class_for_interface (vnm, hw_if_index,
1248                                                         hw_class_index))
1249           || (dev_class->is_valid_class_for_interface
1250               && !dev_class->is_valid_class_for_interface (vnm, hw_if_index,
1251                                                            hw_class_index)))
1252         return clib_error_return (0,
1253                                   "%v class cannot be changed from %s to %s",
1254                                   hi->name, old_class->name, new_class->name);
1255
1256     }
1257
1258   if (old_class->hw_class_change)
1259     old_class->hw_class_change (vnm, hw_if_index, old_class->index,
1260                                 new_class->index);
1261
1262   vnet_hw_interface_init_for_class (vnm, hw_if_index, new_class->index,
1263                                     /* instance */ ~0);
1264
1265   if (new_class->hw_class_change)
1266     new_class->hw_class_change (vnm, hw_if_index, old_class->index,
1267                                 new_class->index);
1268
1269   if (dev_class->hw_class_change)
1270     dev_class->hw_class_change (vnm, hw_if_index, new_class->index);
1271
1272   return error;
1273 }
1274
1275 clib_error_t *
1276 vnet_hw_interface_set_class (vnet_main_t * vnm, u32 hw_if_index,
1277                              u32 hw_class_index)
1278 {
1279   return vnet_hw_interface_set_class_helper (vnm, hw_if_index, hw_class_index,
1280                                              /* redistribute */ 1);
1281 }
1282
1283 static int
1284 vnet_hw_interface_rx_redirect_to_node_helper (vnet_main_t * vnm,
1285                                               u32 hw_if_index,
1286                                               u32 node_index,
1287                                               u32 redistribute)
1288 {
1289   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1290   vnet_device_class_t *dev_class = vnet_get_device_class
1291     (vnm, hi->dev_class_index);
1292
1293   if (dev_class->rx_redirect_to_node)
1294     {
1295       dev_class->rx_redirect_to_node (vnm, hw_if_index, node_index);
1296       return 0;
1297     }
1298
1299   return VNET_API_ERROR_UNIMPLEMENTED;
1300 }
1301
1302 int
1303 vnet_hw_interface_rx_redirect_to_node (vnet_main_t * vnm, u32 hw_if_index,
1304                                        u32 node_index)
1305 {
1306   return vnet_hw_interface_rx_redirect_to_node_helper (vnm, hw_if_index,
1307                                                        node_index,
1308                                                        1 /* redistribute */ );
1309 }
1310
1311 word
1312 vnet_sw_interface_compare (vnet_main_t * vnm,
1313                            uword sw_if_index0, uword sw_if_index1)
1314 {
1315   vnet_sw_interface_t *sup0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1316   vnet_sw_interface_t *sup1 = vnet_get_sup_sw_interface (vnm, sw_if_index1);
1317   vnet_hw_interface_t *h0 = vnet_get_hw_interface (vnm, sup0->hw_if_index);
1318   vnet_hw_interface_t *h1 = vnet_get_hw_interface (vnm, sup1->hw_if_index);
1319
1320   if (h0 != h1)
1321     return vec_cmp (h0->name, h1->name);
1322   return (word) h0->hw_instance - (word) h1->hw_instance;
1323 }
1324
1325 word
1326 vnet_hw_interface_compare (vnet_main_t * vnm,
1327                            uword hw_if_index0, uword hw_if_index1)
1328 {
1329   vnet_hw_interface_t *h0 = vnet_get_hw_interface (vnm, hw_if_index0);
1330   vnet_hw_interface_t *h1 = vnet_get_hw_interface (vnm, hw_if_index1);
1331
1332   if (h0 != h1)
1333     return vec_cmp (h0->name, h1->name);
1334   return (word) h0->hw_instance - (word) h1->hw_instance;
1335 }
1336
1337 int
1338 vnet_sw_interface_is_p2p (vnet_main_t * vnm, u32 sw_if_index)
1339 {
1340   vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
1341   if ((si->type == VNET_SW_INTERFACE_TYPE_P2P) ||
1342       (si->type == VNET_SW_INTERFACE_TYPE_PIPE))
1343     return 1;
1344
1345   vnet_hw_interface_t *hw = vnet_get_sup_hw_interface (vnm, sw_if_index);
1346   vnet_hw_interface_class_t *hc =
1347     vnet_get_hw_interface_class (vnm, hw->hw_class_index);
1348
1349   return (hc->flags & VNET_HW_INTERFACE_CLASS_FLAG_P2P);
1350 }
1351
1352 int
1353 vnet_sw_interface_is_nbma (vnet_main_t * vnm, u32 sw_if_index)
1354 {
1355   vnet_hw_interface_t *hw = vnet_get_sup_hw_interface (vnm, sw_if_index);
1356   vnet_hw_interface_class_t *hc =
1357     vnet_get_hw_interface_class (vnm, hw->hw_class_index);
1358
1359   return (hc->flags & VNET_HW_INTERFACE_CLASS_FLAG_NBMA);
1360 }
1361
1362 clib_error_t *
1363 vnet_sw_interface_supports_addressing (vnet_main_t *vnm, u32 sw_if_index)
1364 {
1365   if (sw_if_index == 0)
1366     {
1367       return clib_error_create (
1368         "local0 interface doesn't support IP addressing");
1369     }
1370
1371   if (vnet_sw_interface_is_sub (vnm, sw_if_index))
1372     {
1373       vnet_sw_interface_t *si;
1374       si = vnet_get_sw_interface_or_null (vnm, sw_if_index);
1375       if (si && si->type == VNET_SW_INTERFACE_TYPE_SUB &&
1376           si->sub.eth.flags.exact_match == 0)
1377         {
1378           return clib_error_create (
1379             "sub-interface without exact-match doesn't support IP addressing");
1380         }
1381     }
1382   return NULL;
1383 }
1384
1385 clib_error_t *
1386 vnet_interface_init (vlib_main_t * vm)
1387 {
1388   vnet_main_t *vnm = vnet_get_main ();
1389   vnet_interface_main_t *im = &vnm->interface_main;
1390   vlib_buffer_t *b = 0;
1391   vnet_buffer_opaque_t *o = 0;
1392   clib_error_t *error;
1393
1394   /*
1395    * Keep people from shooting themselves in the foot.
1396    */
1397   if (sizeof (b->opaque) != sizeof (vnet_buffer_opaque_t))
1398     {
1399 #define _(a) if (sizeof(o->a) > sizeof (o->unused))                     \
1400       clib_warning                                                      \
1401         ("FATAL: size of opaque union subtype %s is %d (max %d)",       \
1402          #a, sizeof(o->a), sizeof (o->unused));
1403       foreach_buffer_opaque_union_subtype;
1404 #undef _
1405
1406       return clib_error_return
1407         (0, "FATAL: size of vlib buffer opaque %d, size of vnet opaque %d",
1408          sizeof (b->opaque), sizeof (vnet_buffer_opaque_t));
1409     }
1410
1411   clib_spinlock_init (&im->sw_if_counter_lock);
1412   clib_spinlock_lock (&im->sw_if_counter_lock); /* should be no need */
1413
1414   vec_validate (im->sw_if_counters, VNET_N_SIMPLE_INTERFACE_COUNTER - 1);
1415 #define _(E,n,p)                                                        \
1416   im->sw_if_counters[VNET_INTERFACE_COUNTER_##E].name = #n;             \
1417   im->sw_if_counters[VNET_INTERFACE_COUNTER_##E].stat_segment_name = "/" #p "/" #n;
1418   foreach_simple_interface_counter_name
1419 #undef _
1420     vec_validate (im->combined_sw_if_counters,
1421                   VNET_N_COMBINED_INTERFACE_COUNTER - 1);
1422 #define _(E,n,p)                                                        \
1423   im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_##E].name = #n;    \
1424   im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_##E].stat_segment_name = "/" #p "/" #n;
1425   foreach_combined_interface_counter_name
1426 #undef _
1427     clib_spinlock_unlock (&im->sw_if_counter_lock);
1428
1429   im->device_class_by_name = hash_create_string ( /* size */ 0,
1430                                                  sizeof (uword));
1431   {
1432     vnet_device_class_t *c;
1433
1434     c = vnm->device_class_registrations;
1435
1436     while (c)
1437       {
1438         c->index = vec_len (im->device_classes);
1439         hash_set_mem (im->device_class_by_name, c->name, c->index);
1440
1441         /* to avoid confusion, please remove ".tx_function" statement
1442           from VNET_DEVICE_CLASS() if using function candidates */
1443         ASSERT (c->tx_fn_registrations == 0 || c->tx_function == 0);
1444
1445         if (c->tx_fn_registrations)
1446           c->tx_function = vlib_node_get_preferred_node_fn_variant (
1447             vm, c->tx_fn_registrations);
1448
1449         vec_add1 (im->device_classes, c[0]);
1450         c = c->next_class_registration;
1451       }
1452   }
1453
1454   im->hw_interface_class_by_name = hash_create_string ( /* size */ 0,
1455                                                        sizeof (uword));
1456
1457   im->rxq_index_by_hw_if_index_and_queue_id =
1458     hash_create_mem (0, sizeof (u64), sizeof (u32));
1459   im->txq_index_by_hw_if_index_and_queue_id =
1460     hash_create_mem (0, sizeof (u64), sizeof (u32));
1461   im->sw_if_index_by_sup_and_sub = hash_create_mem (0, sizeof (u64),
1462                                                     sizeof (uword));
1463   {
1464     vnet_hw_interface_class_t *c;
1465
1466     c = vnm->hw_interface_class_registrations;
1467
1468     while (c)
1469       {
1470         c->index = vec_len (im->hw_interface_classes);
1471         hash_set_mem (im->hw_interface_class_by_name, c->name, c->index);
1472
1473         if (NULL == c->build_rewrite)
1474           c->build_rewrite = default_build_rewrite;
1475         if (NULL == c->update_adjacency)
1476           c->update_adjacency = default_update_adjacency;
1477
1478         vec_add1 (im->hw_interface_classes, c[0]);
1479         c = c->next_class_registration;
1480       }
1481   }
1482
1483   /* init per-thread data */
1484   vec_validate_aligned (im->per_thread_data, vlib_num_workers (),
1485                         CLIB_CACHE_LINE_BYTES);
1486
1487   if ((error = vlib_call_init_function (vm, vnet_interface_cli_init)))
1488     return error;
1489
1490   vnm->interface_tag_by_sw_if_index = hash_create (0, sizeof (uword));
1491
1492   return 0;
1493 }
1494
1495 VLIB_INIT_FUNCTION (vnet_interface_init);
1496
1497 /* Kludge to renumber interface names [only!] */
1498 int
1499 vnet_interface_name_renumber (u32 sw_if_index, u32 new_show_dev_instance)
1500 {
1501   int rv;
1502   vnet_main_t *vnm = vnet_get_main ();
1503   vnet_interface_main_t *im = &vnm->interface_main;
1504   vnet_hw_interface_t *hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
1505
1506   vnet_device_class_t *dev_class = vnet_get_device_class
1507     (vnm, hi->dev_class_index);
1508
1509   if (dev_class->name_renumber == 0 || dev_class->format_device_name == 0)
1510     return VNET_API_ERROR_UNIMPLEMENTED;
1511
1512   rv = dev_class->name_renumber (hi, new_show_dev_instance);
1513
1514   if (rv)
1515     return rv;
1516
1517   hash_unset_mem (im->hw_interface_by_name, hi->name);
1518   vec_free (hi->name);
1519   /* Use the mapping we set up to call it Ishmael */
1520   hi->name = format (0, "%U", dev_class->format_device_name,
1521                      hi->dev_instance);
1522
1523   hash_set_mem (im->hw_interface_by_name, hi->name, hi->hw_if_index);
1524   return rv;
1525 }
1526
1527 clib_error_t *
1528 vnet_rename_interface (vnet_main_t * vnm, u32 hw_if_index, char *new_name)
1529 {
1530   vnet_interface_main_t *im = &vnm->interface_main;
1531   vlib_main_t *vm = vnm->vlib_main;
1532   vnet_hw_interface_t *hw;
1533   u8 *old_name;
1534   clib_error_t *error = 0;
1535
1536   hw = vnet_get_hw_interface (vnm, hw_if_index);
1537   if (!hw)
1538     {
1539       return clib_error_return (0,
1540                                 "unable to find hw interface for index %u",
1541                                 hw_if_index);
1542     }
1543
1544   old_name = hw->name;
1545
1546   /* set new hw->name */
1547   hw->name = format (0, "%s", new_name);
1548
1549   /* remove the old name to hw_if_index mapping and install the new one */
1550   hash_unset_mem (im->hw_interface_by_name, old_name);
1551   hash_set_mem (im->hw_interface_by_name, hw->name, hw_if_index);
1552
1553   /* rename tx/output nodes */
1554   vlib_node_rename (vm, hw->tx_node_index, "%v-tx", hw->name);
1555   vlib_node_rename (vm, hw->output_node_index, "%v-output", hw->name);
1556
1557   /* free the old name vector */
1558   vec_free (old_name);
1559
1560   return error;
1561 }
1562
1563 clib_error_t *
1564 vnet_hw_interface_add_del_mac_address (vnet_main_t * vnm,
1565                                        u32 hw_if_index,
1566                                        const u8 * mac_address, u8 is_add)
1567 {
1568   clib_error_t *error = 0;
1569   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1570
1571   vnet_device_class_t *dev_class =
1572     vnet_get_device_class (vnm, hi->dev_class_index);
1573
1574   if (!hi->hw_address)
1575     {
1576       error =
1577         clib_error_return
1578         (0, "Secondary MAC Addresses not supported for interface index %u",
1579          hw_if_index);
1580       goto done;
1581     }
1582
1583   if (dev_class->mac_addr_add_del_function)
1584     error = dev_class->mac_addr_add_del_function (hi, mac_address, is_add);
1585
1586   if (!error)
1587     {
1588       vnet_hw_interface_class_t *hw_class;
1589
1590       hw_class = vnet_get_hw_interface_class (vnm, hi->hw_class_index);
1591
1592       if (NULL != hw_class->mac_addr_add_del_function)
1593         error = hw_class->mac_addr_add_del_function (hi, mac_address, is_add);
1594     }
1595
1596   /* If no errors, add to the list of secondary MACs on the ethernet intf */
1597   if (!error)
1598     ethernet_interface_add_del_address (&ethernet_main, hw_if_index,
1599                                         mac_address, is_add);
1600
1601 done:
1602   if (error)
1603     log_err ("hw_add_del_mac_address: %U", format_clib_error, error);
1604   return error;
1605 }
1606
1607 static clib_error_t *
1608 vnet_hw_interface_change_mac_address_helper (vnet_main_t * vnm,
1609                                              u32 hw_if_index,
1610                                              const u8 * mac_address)
1611 {
1612   clib_error_t *error = 0;
1613   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1614
1615   if (hi->hw_address)
1616     {
1617       u8 *old_address = vec_dup (hi->hw_address);
1618       vnet_device_class_t *dev_class =
1619         vnet_get_device_class (vnm, hi->dev_class_index);
1620       if (dev_class->mac_addr_change_function)
1621         {
1622           error =
1623             dev_class->mac_addr_change_function (hi, old_address,
1624                                                  mac_address);
1625         }
1626       if (!error)
1627         {
1628           vnet_hw_interface_class_t *hw_class;
1629
1630           hw_class = vnet_get_hw_interface_class (vnm, hi->hw_class_index);
1631
1632           if (NULL != hw_class->mac_addr_change_function)
1633             hw_class->mac_addr_change_function (hi, old_address, mac_address);
1634         }
1635       else
1636         {
1637           error =
1638             clib_error_return (0,
1639                                "MAC Address Change is not supported on this interface");
1640         }
1641       vec_free (old_address);
1642     }
1643   else
1644     {
1645       error =
1646         clib_error_return (0,
1647                            "mac address change is not supported for interface index %u",
1648                            hw_if_index);
1649     }
1650   return error;
1651 }
1652
1653 clib_error_t *
1654 vnet_hw_interface_change_mac_address (vnet_main_t * vnm, u32 hw_if_index,
1655                                       const u8 * mac_address)
1656 {
1657   return vnet_hw_interface_change_mac_address_helper
1658     (vnm, hw_if_index, mac_address);
1659 }
1660
1661 static int
1662 vnet_sw_interface_check_table_same (u32 unnumbered_sw_if_index,
1663                                     u32 ip_sw_if_index)
1664 {
1665   if (ip4_main.fib_index_by_sw_if_index[unnumbered_sw_if_index] !=
1666       ip4_main.fib_index_by_sw_if_index[ip_sw_if_index])
1667     return VNET_API_ERROR_UNEXPECTED_INTF_STATE;
1668
1669   if (ip4_main.mfib_index_by_sw_if_index[unnumbered_sw_if_index] !=
1670       ip4_main.mfib_index_by_sw_if_index[ip_sw_if_index])
1671     return VNET_API_ERROR_UNEXPECTED_INTF_STATE;
1672
1673   if (ip6_main.fib_index_by_sw_if_index[unnumbered_sw_if_index] !=
1674       ip6_main.fib_index_by_sw_if_index[ip_sw_if_index])
1675     return VNET_API_ERROR_UNEXPECTED_INTF_STATE;
1676
1677   if (ip6_main.mfib_index_by_sw_if_index[unnumbered_sw_if_index] !=
1678       ip6_main.mfib_index_by_sw_if_index[ip_sw_if_index])
1679     return VNET_API_ERROR_UNEXPECTED_INTF_STATE;
1680
1681   return 0;
1682 }
1683
1684 /* update the unnumbered state of an interface*/
1685 int
1686 vnet_sw_interface_update_unnumbered (u32 unnumbered_sw_if_index,
1687                                      u32 ip_sw_if_index, u8 enable)
1688 {
1689   vnet_main_t *vnm = vnet_get_main ();
1690   vnet_sw_interface_t *si;
1691   u32 was_unnum;
1692   int rv = 0;
1693
1694   si = vnet_get_sw_interface (vnm, unnumbered_sw_if_index);
1695   was_unnum = (si->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED);
1696
1697   if (enable)
1698     {
1699       rv = vnet_sw_interface_check_table_same (unnumbered_sw_if_index,
1700                                                ip_sw_if_index);
1701       if (rv != 0)
1702         return rv;
1703       si->flags |= VNET_SW_INTERFACE_FLAG_UNNUMBERED;
1704       si->unnumbered_sw_if_index = ip_sw_if_index;
1705
1706       ip4_main.lookup_main.if_address_pool_index_by_sw_if_index
1707         [unnumbered_sw_if_index] =
1708         ip4_main.
1709         lookup_main.if_address_pool_index_by_sw_if_index[ip_sw_if_index];
1710       ip6_main.
1711         lookup_main.if_address_pool_index_by_sw_if_index
1712         [unnumbered_sw_if_index] =
1713         ip6_main.
1714         lookup_main.if_address_pool_index_by_sw_if_index[ip_sw_if_index];
1715     }
1716   else
1717     {
1718       /*
1719        * Unless the interface is actually unnumbered, don't
1720        * smash e.g. if_address_pool_index_by_sw_if_index
1721        */
1722       if (si->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED)
1723         {
1724           si->flags &= ~(VNET_SW_INTERFACE_FLAG_UNNUMBERED);
1725           si->unnumbered_sw_if_index = (u32) ~0;
1726
1727           ip4_main.lookup_main
1728             .if_address_pool_index_by_sw_if_index[unnumbered_sw_if_index] = ~0;
1729           ip6_main.lookup_main
1730             .if_address_pool_index_by_sw_if_index[unnumbered_sw_if_index] = ~0;
1731         }
1732     }
1733
1734   if (was_unnum != (si->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED))
1735     {
1736       ip4_sw_interface_enable_disable (unnumbered_sw_if_index, enable);
1737       ip6_sw_interface_enable_disable (unnumbered_sw_if_index, enable);
1738     }
1739
1740   return 0;
1741 }
1742
1743 vnet_l3_packet_type_t
1744 vnet_link_to_l3_proto (vnet_link_t link)
1745 {
1746   switch (link)
1747     {
1748     case VNET_LINK_IP4:
1749       return (VNET_L3_PACKET_TYPE_IP4);
1750     case VNET_LINK_IP6:
1751       return (VNET_L3_PACKET_TYPE_IP6);
1752     case VNET_LINK_MPLS:
1753       return (VNET_L3_PACKET_TYPE_MPLS);
1754     case VNET_LINK_ARP:
1755       return (VNET_L3_PACKET_TYPE_ARP);
1756     case VNET_LINK_ETHERNET:
1757     case VNET_LINK_NSH:
1758       ASSERT (0);
1759       break;
1760     }
1761   ASSERT (0);
1762   return (0);
1763 }
1764
1765 vnet_mtu_t
1766 vnet_link_to_mtu (vnet_link_t link)
1767 {
1768   switch (link)
1769     {
1770     case VNET_LINK_IP4:
1771       return (VNET_MTU_IP4);
1772     case VNET_LINK_IP6:
1773       return (VNET_MTU_IP6);
1774     case VNET_LINK_MPLS:
1775       return (VNET_MTU_MPLS);
1776     default:
1777       return (VNET_MTU_L3);
1778     }
1779 }
1780
1781 u8 *
1782 default_build_rewrite (vnet_main_t * vnm,
1783                        u32 sw_if_index,
1784                        vnet_link_t link_type, const void *dst_address)
1785 {
1786   return (NULL);
1787 }
1788
1789 void
1790 default_update_adjacency (vnet_main_t * vnm, u32 sw_if_index, u32 ai)
1791 {
1792   ip_adjacency_t *adj;
1793
1794   adj = adj_get (ai);
1795
1796   switch (adj->lookup_next_index)
1797     {
1798     case IP_LOOKUP_NEXT_GLEAN:
1799       adj_glean_update_rewrite (ai);
1800       break;
1801     case IP_LOOKUP_NEXT_ARP:
1802     case IP_LOOKUP_NEXT_BCAST:
1803       /*
1804        * default rewrite in neighbour adj
1805        */
1806       adj_nbr_update_rewrite
1807         (ai,
1808          ADJ_NBR_REWRITE_FLAG_COMPLETE,
1809          vnet_build_rewrite_for_sw_interface (vnm,
1810                                               sw_if_index,
1811                                               adj_get_link_type (ai), NULL));
1812       break;
1813     case IP_LOOKUP_NEXT_MCAST:
1814       /*
1815        * mcast traffic also uses default rewrite string with no mcast
1816        * switch time updates.
1817        */
1818       adj_mcast_update_rewrite
1819         (ai,
1820          vnet_build_rewrite_for_sw_interface (vnm,
1821                                               sw_if_index,
1822                                               adj_get_link_type (ai),
1823                                               NULL), 0);
1824       break;
1825     case IP_LOOKUP_NEXT_DROP:
1826     case IP_LOOKUP_NEXT_PUNT:
1827     case IP_LOOKUP_NEXT_LOCAL:
1828     case IP_LOOKUP_NEXT_REWRITE:
1829     case IP_LOOKUP_NEXT_MCAST_MIDCHAIN:
1830     case IP_LOOKUP_NEXT_MIDCHAIN:
1831     case IP_LOOKUP_NEXT_ICMP_ERROR:
1832     case IP_LOOKUP_N_NEXT:
1833       ASSERT (0);
1834       break;
1835     }
1836 }
1837
1838 clib_error_t *
1839 vnet_hw_interface_set_rss_queues (vnet_main_t * vnm,
1840                                   vnet_hw_interface_t * hi,
1841                                   clib_bitmap_t * bitmap)
1842 {
1843   clib_error_t *error = 0;
1844   vnet_device_class_t *dev_class =
1845     vnet_get_device_class (vnm, hi->dev_class_index);
1846
1847   if (dev_class->set_rss_queues_function)
1848     {
1849       if (clib_bitmap_count_set_bits (bitmap) == 0)
1850         {
1851           error = clib_error_return (0,
1852                                      "must assign at least one valid rss queue");
1853           goto done;
1854         }
1855
1856       error = dev_class->set_rss_queues_function (vnm, hi, bitmap);
1857     }
1858   else
1859     {
1860       error = clib_error_return (0,
1861                                  "setting rss queues is not supported on this interface");
1862     }
1863
1864   if (!error)
1865     {
1866       clib_bitmap_free (hi->rss_queues);
1867       hi->rss_queues = clib_bitmap_dup (bitmap);
1868     }
1869
1870 done:
1871   if (error)
1872     log_err ("hw_set_rss_queues: %U", format_clib_error, error);
1873   return error;
1874 }
1875
1876 int collect_detailed_interface_stats_flag = 0;
1877
1878 void
1879 collect_detailed_interface_stats_flag_set (void)
1880 {
1881   collect_detailed_interface_stats_flag = 1;
1882 }
1883
1884 void
1885 collect_detailed_interface_stats_flag_clear (void)
1886 {
1887   collect_detailed_interface_stats_flag = 0;
1888 }
1889
1890 static clib_error_t *
1891 collect_detailed_interface_stats_cli (vlib_main_t * vm,
1892                                       unformat_input_t * input,
1893                                       vlib_cli_command_t * cmd)
1894 {
1895   unformat_input_t _line_input, *line_input = &_line_input;
1896   clib_error_t *error = NULL;
1897
1898   /* Get a line of input. */
1899   if (!unformat_user (input, unformat_line_input, line_input))
1900     return clib_error_return (0, "expected enable | disable");
1901
1902   while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
1903     {
1904       if (unformat (line_input, "enable") || unformat (line_input, "on"))
1905         collect_detailed_interface_stats_flag_set ();
1906       else if (unformat (line_input, "disable")
1907                || unformat (line_input, "off"))
1908         collect_detailed_interface_stats_flag_clear ();
1909       else
1910         {
1911           error = clib_error_return (0, "unknown input `%U'",
1912                                      format_unformat_error, line_input);
1913           goto done;
1914         }
1915     }
1916
1917 done:
1918   unformat_free (line_input);
1919   return error;
1920 }
1921
1922 /* *INDENT-OFF* */
1923 VLIB_CLI_COMMAND (collect_detailed_interface_stats_command, static) = {
1924   .path = "interface collect detailed-stats",
1925   .short_help = "interface collect detailed-stats <enable|disable>",
1926   .function = collect_detailed_interface_stats_cli,
1927 };
1928 /* *INDENT-ON* */
1929
1930 /*
1931  * fd.io coding-style-patch-verification: ON
1932  *
1933  * Local Variables:
1934  * eval: (c-set-style "gnu")
1935  * End:
1936  */