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
  47 /* *INDENT-OFF* */
  48 VLIB_REGISTER_LOG_CLASS (if_default_log, static) = {
  49   .class_name = "interface",
  50   .default_syslog_level = VLIB_LOG_LEVEL_DEBUG,
  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           /* save the si admin up flag */
 466           old_flags = si->flags;
 467
 468           /* update si admin up flag in advance if we are going admin down */
 469           if (!(flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
 470             si->flags &= ~VNET_SW_INTERFACE_FLAG_ADMIN_UP;
 471
 472           if (dev_class->admin_up_down_function
 473               && (error = dev_class->admin_up_down_function (vnm,
 474                                                              si->hw_if_index,
 475                                                              flags)))
 476             {
 477               /* restore si admin up flag to it's original state on errors */
 478               si->flags = old_flags;
 479               goto done;
 480             }
 481
 482           if (hw_class->admin_up_down_function
 483               && (error = hw_class->admin_up_down_function (vnm,
 484                                                             si->hw_if_index,
 485                                                             flags)))
 486             {
 487               /* restore si admin up flag to it's original state on errors */
 488               si->flags = old_flags;
 489               goto done;
 490             }
 491
 492           /* Admin down implies link down. */
 493           if (!(flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
 494               && (hi->flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
 495             vnet_hw_interface_set_flags_helper (vnm, si->hw_if_index,
 496                                                 hi->flags &
 497                                                 ~VNET_HW_INTERFACE_FLAG_LINK_UP,
 498                                                 helper_flags);
 499           vnet_hw_if_update_runtime_data (vnm, si->hw_if_index);
 500         }
 501     }
 502
 503   si->flags &= ~mask;
 504   si->flags |= flags;
 505
 506 done:
 507   if (error)
 508     log_err ("sw_set_flags_helper: %U", format_clib_error, error);
 509   return error;
 510 }
 511
 512 clib_error_t *
 513 vnet_hw_interface_set_flags (vnet_main_t * vnm, u32 hw_if_index,
 514                              vnet_hw_interface_flags_t flags)
 515 {
 516   log_debug ("hw_set_flags: hw_if_index %u flags 0x%x", hw_if_index, flags);
 517   return vnet_hw_interface_set_flags_helper
 518     (vnm, hw_if_index, flags,
 519      VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE);
 520 }
 521
 522 clib_error_t *
 523 vnet_sw_interface_set_flags (vnet_main_t * vnm, u32 sw_if_index,
 524                              vnet_sw_interface_flags_t flags)
 525 {
 526   log_debug ("sw_set_flags: sw_if_index %u flags 0x%x", sw_if_index, flags);
 527   return vnet_sw_interface_set_flags_helper
 528     (vnm, sw_if_index, flags,
 529      VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE);
 530 }
 531
 532 void
 533 vnet_sw_interface_admin_up (vnet_main_t * vnm, u32 sw_if_index)
 534 {
 535   u32 flags = vnet_sw_interface_get_flags (vnm, sw_if_index);
 536   log_debug ("sw_admin_up: sw_if_index %u", sw_if_index);
 537
 538   if (!(flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
 539     {
 540       flags |= VNET_SW_INTERFACE_FLAG_ADMIN_UP;
 541       vnet_sw_interface_set_flags (vnm, sw_if_index, flags);
 542     }
 543 }
 544
 545 void
 546 vnet_sw_interface_admin_down (vnet_main_t * vnm, u32 sw_if_index)
 547 {
 548   u32 flags = vnet_sw_interface_get_flags (vnm, sw_if_index);
 549   log_debug ("sw_admin_down: sw_if_index %u", sw_if_index);
 550
 551   if (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
 552     {
 553       flags &= ~(VNET_SW_INTERFACE_FLAG_ADMIN_UP);
 554       vnet_sw_interface_set_flags (vnm, sw_if_index, flags);
 555     }
 556 }
 557
 558 static u32
 559 vnet_create_sw_interface_no_callbacks (vnet_main_t * vnm,
 560                                        vnet_sw_interface_t * template)
 561 {
 562   vnet_interface_main_t *im = &vnm->interface_main;
 563   vnet_sw_interface_t *sw;
 564   u32 sw_if_index;
 565
 566   pool_get (im->sw_interfaces, sw);
 567   sw_if_index = sw - im->sw_interfaces;
 568
 569   sw[0] = template[0];
 570
 571   sw->flags = 0;
 572   sw->sw_if_index = sw_if_index;
 573   if (sw->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
 574     sw->sup_sw_if_index = sw->sw_if_index;
 575
 576   /* Allocate counters for this interface. */
 577   {
 578     u32 i;
 579
 580     vnet_interface_counter_lock (im);
 581
 582     for (i = 0; i < vec_len (im->sw_if_counters); i++)
 583       {
 584         vlib_validate_simple_counter (&im->sw_if_counters[i], sw_if_index);
 585         vlib_zero_simple_counter (&im->sw_if_counters[i], sw_if_index);
 586       }
 587
 588     for (i = 0; i < vec_len (im->combined_sw_if_counters); i++)
 589       {
 590         vlib_validate_combined_counter (&im->combined_sw_if_counters[i],
 591                                         sw_if_index);
 592         vlib_zero_combined_counter (&im->combined_sw_if_counters[i],
 593                                     sw_if_index);
 594       }
 595
 596     vnet_interface_counter_unlock (im);
 597   }
 598
 599   return sw_if_index;
 600 }
 601
 602 clib_error_t *
 603 vnet_create_sw_interface (vnet_main_t * vnm, vnet_sw_interface_t * template,
 604                           u32 * sw_if_index)
 605 {
 606   vnet_interface_main_t *im = &vnm->interface_main;
 607   clib_error_t *error;
 608   vnet_hw_interface_t *hi;
 609   vnet_device_class_t *dev_class;
 610
 611   if (template->sub.eth.flags.two_tags == 1
 612       && template->sub.eth.flags.exact_match == 1
 613       && (template->sub.eth.flags.inner_vlan_id_any == 1
 614           || template->sub.eth.flags.outer_vlan_id_any == 1))
 615     {
 616       char *str = "inner-dot1q any exact-match is unsupported";
 617       error = clib_error_return (0, str);
 618       log_err ("create_sw_interface: %s", str);
 619       return error;
 620     }
 621
 622   hi = vnet_get_sup_hw_interface (vnm, template->sup_sw_if_index);
 623   dev_class = vnet_get_device_class (vnm, hi->dev_class_index);
 624
 625   if (template->type == VNET_SW_INTERFACE_TYPE_SUB &&
 626       dev_class->subif_add_del_function)
 627     {
 628       error = dev_class->subif_add_del_function (vnm, hi->hw_if_index,
 629                                                  (struct vnet_sw_interface_t
 630                                                   *) template, 1);
 631       if (error)
 632         return error;
 633     }
 634
 635   *sw_if_index = vnet_create_sw_interface_no_callbacks (vnm, template);
 636   error = vnet_sw_interface_set_flags_helper
 637     (vnm, *sw_if_index, template->flags,
 638      VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE);
 639
 640   if (error)
 641     {
 642       /* undo the work done by vnet_create_sw_interface_no_callbacks() */
 643       log_err ("create_sw_interface: set flags failed\n  %U",
 644                format_clib_error, error);
 645       vnet_sw_interface_t *sw =
 646         pool_elt_at_index (im->sw_interfaces, *sw_if_index);
 647       pool_put (im->sw_interfaces, sw);
 648     }
 649   else
 650     {
 651       vnet_sw_interface_t *sw =
 652         pool_elt_at_index (im->sw_interfaces, *sw_if_index);
 653       log_debug ("create_sw_interface: interface %U (sw_if_index %u) created",
 654                  format_vnet_sw_interface_name, vnm, sw, *sw_if_index);
 655     }
 656
 657   return error;
 658 }
 659
 660 void
 661 vnet_delete_sw_interface (vnet_main_t * vnm, u32 sw_if_index)
 662 {
 663   vnet_interface_main_t *im = &vnm->interface_main;
 664   vnet_sw_interface_t *sw =
 665     pool_elt_at_index (im->sw_interfaces, sw_if_index);
 666
 667   log_debug ("delete_sw_interface: sw_if_index %u, name '%U'",
 668              sw_if_index, format_vnet_sw_if_index_name, vnm, sw_if_index);
 669
 670   /* Check if the interface has config and is removed from L2 BD or XConnect */
 671   vnet_clear_sw_interface_tag (vnm, sw_if_index);
 672
 673   /* Bring down interface in case it is up. */
 674   if (sw->flags != 0)
 675     vnet_sw_interface_set_flags (vnm, sw_if_index, /* flags */ 0);
 676
 677   call_sw_interface_add_del_callbacks (vnm, sw_if_index, /* is_create */ 0);
 678
 679   pool_put (im->sw_interfaces, sw);
 680 }
 681
 682 static clib_error_t *
 683 call_sw_interface_mtu_change_callbacks (vnet_main_t * vnm, u32 sw_if_index)
 684 {
 685   return call_elf_section_interface_callbacks
 686     (vnm, sw_if_index, 0, vnm->sw_interface_mtu_change_functions);
 687 }
 688
 689 void
 690 vnet_sw_interface_set_mtu (vnet_main_t * vnm, u32 sw_if_index, u32 mtu)
 691 {
 692   vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
 693
 694   if (si->mtu[VNET_MTU_L3] != mtu)
 695     {
 696       si->mtu[VNET_MTU_L3] = mtu;
 697       log_debug ("set_mtu: interface %U, new mtu %u",
 698                  format_vnet_sw_if_index_name, vnm, sw_if_index, mtu);
 699
 700       call_sw_interface_mtu_change_callbacks (vnm, sw_if_index);
 701     }
 702 }
 703
 704 void
 705 vnet_sw_interface_set_protocol_mtu (vnet_main_t * vnm, u32 sw_if_index,
 706                                     u32 mtu[])
 707 {
 708   vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
 709   bool changed = false;
 710   int i;
 711
 712   for (i = 0; i < VNET_N_MTU; i++)
 713     {
 714       if (si->mtu[i] != mtu[i])
 715         {
 716           si->mtu[i] = mtu[i];
 717           changed = true;
 718         }
 719     }
 720   /* Notify interested parties */
 721   if (changed)
 722     {
 723       log_debug ("set_protocol_mtu: interface %U l3 %u ip4 %u ip6 %u mpls %u",
 724                  format_vnet_sw_if_index_name, vnm, sw_if_index,
 725                  mtu[VNET_MTU_L3], mtu[VNET_MTU_IP4], mtu[VNET_MTU_IP6],
 726                  mtu[VNET_MTU_MPLS]);
 727       call_sw_interface_mtu_change_callbacks (vnm, sw_if_index);
 728     }
 729 }
 730
 731 void
 732 vnet_sw_interface_ip_directed_broadcast (vnet_main_t * vnm,
 733                                          u32 sw_if_index, u8 enable)
 734 {
 735   vnet_sw_interface_t *si;
 736
 737   si = vnet_get_sw_interface (vnm, sw_if_index);
 738
 739   if (enable)
 740     si->flags |= VNET_SW_INTERFACE_FLAG_DIRECTED_BCAST;
 741   else
 742     si->flags &= ~VNET_SW_INTERFACE_FLAG_DIRECTED_BCAST;
 743
 744   ip4_directed_broadcast (sw_if_index, enable);
 745 }
 746
 747 /*
 748  * Reflect a change in hardware MTU on protocol MTUs
 749  */
 750 static walk_rc_t
 751 sw_interface_walk_callback (vnet_main_t * vnm, u32 sw_if_index, void *ctx)
 752 {
 753   u32 *link_mtu = ctx;
 754   vnet_sw_interface_set_mtu (vnm, sw_if_index, *link_mtu);
 755   return WALK_CONTINUE;
 756 }
 757
 758 void
 759 vnet_hw_interface_set_mtu (vnet_main_t * vnm, u32 hw_if_index, u32 mtu)
 760 {
 761   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
 762
 763   if (hi->max_packet_bytes != mtu)
 764     {
 765       hi->max_packet_bytes = mtu;
 766       ethernet_set_flags (vnm, hw_if_index, ETHERNET_INTERFACE_FLAG_MTU);
 767       vnet_hw_interface_walk_sw (vnm, hw_if_index, sw_interface_walk_callback,
 768                                  &mtu);
 769     }
 770 }
 771
 772 static void
 773 setup_tx_node (vlib_main_t * vm,
 774                u32 node_index, vnet_device_class_t * dev_class)
 775 {
 776   vlib_node_t *n = vlib_get_node (vm, node_index);
 777
 778   n->function = dev_class->tx_function;
 779   n->format_trace = dev_class->format_tx_trace;
 780
 781   /// XXX: Update this to use counter structure
 782   vlib_register_errors (vm, node_index,
 783                         dev_class->tx_function_n_errors,
 784                         dev_class->tx_function_error_strings, 0);
 785 }
 786
 787 static void
 788 setup_output_node (vlib_main_t * vm,
 789                    u32 node_index, vnet_hw_interface_class_t * hw_class)
 790 {
 791   vlib_node_t *n = vlib_get_node (vm, node_index);
 792   n->format_buffer = hw_class->format_header;
 793   n->unformat_buffer = hw_class->unformat_header;
 794 }
 795
 796 /* Register an interface instance. */
 797 u32
 798 vnet_register_interface (vnet_main_t * vnm,
 799                          u32 dev_class_index,
 800                          u32 dev_instance,
 801                          u32 hw_class_index, u32 hw_instance)
 802 {
 803   vnet_interface_main_t *im = &vnm->interface_main;
 804   vnet_hw_interface_t *hw;
 805   vnet_device_class_t *dev_class =
 806     vnet_get_device_class (vnm, dev_class_index);
 807   vnet_hw_interface_class_t *hw_class =
 808     vnet_get_hw_interface_class (vnm, hw_class_index);
 809   vlib_main_t *vm = vnm->vlib_main;
 810   vnet_feature_config_main_t *fcm;
 811   vnet_config_main_t *cm;
 812   u32 hw_index, i;
 813   char *tx_node_name = NULL, *output_node_name = NULL;
 814   vlib_node_function_t *output_node = vnet_interface_output_node_get ();
 815
 816   pool_get (im->hw_interfaces, hw);
 817   clib_memset (hw, 0, sizeof (*hw));
 818   hw->trace_classify_table_index = ~0;
 819
 820   hw_index = hw - im->hw_interfaces;
 821   hw->hw_if_index = hw_index;
 822   hw->default_rx_mode = VNET_HW_IF_RX_MODE_POLLING;
 823
 824   if (dev_class->format_device_name)
 825     hw->name = format (0, "%U", dev_class->format_device_name, dev_instance);
 826   else if (hw_class->format_interface_name)
 827     hw->name = format (0, "%U", hw_class->format_interface_name,
 828                        dev_instance);
 829   else
 830     hw->name = format (0, "%s%x", hw_class->name, dev_instance);
 831
 832   if (!im->hw_interface_by_name)
 833     im->hw_interface_by_name = hash_create_vec ( /* size */ 0,
 834                                                 sizeof (hw->name[0]),
 835                                                 sizeof (uword));
 836
 837   hash_set_mem (im->hw_interface_by_name, hw->name, hw_index);
 838
 839   /* Make hardware interface point to software interface. */
 840   {
 841     vnet_sw_interface_t sw = {
 842       .type = VNET_SW_INTERFACE_TYPE_HARDWARE,
 843       .flood_class = VNET_FLOOD_CLASS_NORMAL,
 844       .hw_if_index = hw_index
 845     };
 846     hw->sw_if_index = vnet_create_sw_interface_no_callbacks (vnm, &sw);
 847   }
 848
 849   hw->dev_class_index = dev_class_index;
 850   hw->dev_instance = dev_instance;
 851   hw->hw_class_index = hw_class_index;
 852   hw->hw_instance = hw_instance;
 853
 854   hw->max_rate_bits_per_sec = 0;
 855   hw->min_packet_bytes = 0;
 856   vnet_sw_interface_set_mtu (vnm, hw->sw_if_index, 0);
 857
 858   if (dev_class->tx_function == 0)
 859     goto no_output_nodes;       /* No output/tx nodes to create */
 860
 861   tx_node_name = (char *) format (0, "%v-tx", hw->name);
 862   output_node_name = (char *) format (0, "%v-output", hw->name);
 863
 864   /* If we have previously deleted interface nodes, re-use them. */
 865   if (vec_len (im->deleted_hw_interface_nodes) > 0)
 866     {
 867       vnet_hw_interface_nodes_t *hn;
 868       vlib_node_t *node;
 869       vlib_node_runtime_t *nrt;
 870
 871       hn = vec_end (im->deleted_hw_interface_nodes) - 1;
 872
 873       hw->tx_node_index = hn->tx_node_index;
 874       hw->output_node_index = hn->output_node_index;
 875
 876       vlib_node_rename (vm, hw->tx_node_index, "%v", tx_node_name);
 877       vlib_node_rename (vm, hw->output_node_index, "%v", output_node_name);
 878
 879       /* *INDENT-OFF* */
 880       foreach_vlib_main ({
 881         vnet_interface_output_runtime_t *rt;
 882
 883         rt = vlib_node_get_runtime_data (this_vlib_main, hw->output_node_index);
 884         ASSERT (rt->is_deleted == 1);
 885         rt->is_deleted = 0;
 886         rt->hw_if_index = hw_index;
 887         rt->sw_if_index = hw->sw_if_index;
 888         rt->dev_instance = hw->dev_instance;
 889
 890         rt = vlib_node_get_runtime_data (this_vlib_main, hw->tx_node_index);
 891         rt->hw_if_index = hw_index;
 892         rt->sw_if_index = hw->sw_if_index;
 893         rt->dev_instance = hw->dev_instance;
 894       });
 895       /* *INDENT-ON* */
 896
 897       /* The new class may differ from the old one.
 898        * Functions have to be updated. */
 899       node = vlib_get_node (vm, hw->output_node_index);
 900       node->function = output_node;
 901       node->format_trace = format_vnet_interface_output_trace;
 902       /* *INDENT-OFF* */
 903       foreach_vlib_main ({
 904         nrt = vlib_node_get_runtime (this_vlib_main, hw->output_node_index);
 905         nrt->function = node->function;
 906         vlib_node_runtime_perf_counter (this_vlib_main, nrt, 0, 0, 0,
 907                                         VLIB_NODE_RUNTIME_PERF_RESET);
 908       });
 909       /* *INDENT-ON* */
 910
 911       node = vlib_get_node (vm, hw->tx_node_index);
 912       node->function = dev_class->tx_function;
 913       node->format_trace = dev_class->format_tx_trace;
 914       /* *INDENT-OFF* */
 915       foreach_vlib_main ({
 916         nrt = vlib_node_get_runtime (this_vlib_main, hw->tx_node_index);
 917         nrt->function = node->function;
 918         vlib_node_runtime_perf_counter (this_vlib_main, nrt, 0, 0, 0,
 919                                         VLIB_NODE_RUNTIME_PERF_RESET);
 920       });
 921       /* *INDENT-ON* */
 922
 923       _vec_len (im->deleted_hw_interface_nodes) -= 1;
 924     }
 925   else
 926     {
 927       vlib_node_registration_t r;
 928       vnet_interface_output_runtime_t rt = {
 929         .hw_if_index = hw_index,
 930         .sw_if_index = hw->sw_if_index,
 931         .dev_instance = hw->dev_instance,
 932         .is_deleted = 0,
 933       };
 934
 935       clib_memset (&r, 0, sizeof (r));
 936       r.type = VLIB_NODE_TYPE_INTERNAL;
 937       r.runtime_data = &rt;
 938       r.runtime_data_bytes = sizeof (rt);
 939       r.scalar_size = 0;
 940       r.vector_size = sizeof (u32);
 941
 942       r.flags = VLIB_NODE_FLAG_IS_OUTPUT;
 943       r.name = tx_node_name;
 944       r.function = dev_class->tx_function;
 945
 946       hw->tx_node_index = vlib_register_node (vm, &r);
 947
 948       vlib_node_add_named_next_with_slot (vm, hw->tx_node_index,
 949                                           "error-drop",
 950                                           VNET_INTERFACE_TX_NEXT_DROP);
 951
 952       r.flags = 0;
 953       r.name = output_node_name;
 954       r.function = output_node;
 955       r.format_trace = format_vnet_interface_output_trace;
 956
 957       {
 958         static char *e[] = {
 959           "interface is down",
 960           "interface is deleted",
 961           "no buffers to segment GSO",
 962         };
 963
 964         r.n_errors = ARRAY_LEN (e);
 965         r.error_strings = e;
 966       }
 967       hw->output_node_index = vlib_register_node (vm, &r);
 968
 969       vlib_node_add_named_next_with_slot (vm, hw->output_node_index,
 970                                           "error-drop",
 971                                           VNET_INTERFACE_OUTPUT_NEXT_DROP);
 972       vlib_node_add_next_with_slot (vm, hw->output_node_index,
 973                                     hw->tx_node_index,
 974                                     VNET_INTERFACE_OUTPUT_NEXT_TX);
 975
 976       /* add interface to the list of "output-interface" feature arc start nodes
 977          and clone nexts from 1st interface if it exists */
 978       fcm = vnet_feature_get_config_main (im->output_feature_arc_index);
 979       cm = &fcm->config_main;
 980       i = vec_len (cm->start_node_indices);
 981       vec_validate (cm->start_node_indices, i);
 982       cm->start_node_indices[i] = hw->output_node_index;
 983       if (hw_index)
 984         {
 985           /* copy nexts from 1st interface */
 986           vnet_hw_interface_t *first_hw;
 987           vlib_node_t *first_node;
 988
 989           first_hw = vnet_get_hw_interface (vnm, /* hw_if_index */ 0);
 990           first_node = vlib_get_node (vm, first_hw->output_node_index);
 991
 992           /* 1st 2 nexts are already added above */
 993           for (i = 2; i < vec_len (first_node->next_nodes); i++)
 994             vlib_node_add_next_with_slot (vm, hw->output_node_index,
 995                                           first_node->next_nodes[i], i);
 996         }
 997     }
 998
 999   setup_output_node (vm, hw->output_node_index, hw_class);
1000   setup_tx_node (vm, hw->tx_node_index, dev_class);
1001
1002 no_output_nodes:
1003   /* Call all up/down callbacks with zero flags when interface is created. */
1004   vnet_sw_interface_set_flags_helper (vnm, hw->sw_if_index, /* flags */ 0,
1005                                       VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE);
1006   vnet_hw_interface_set_flags_helper (vnm, hw_index, /* flags */ 0,
1007                                       VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE);
1008   vec_free (tx_node_name);
1009   vec_free (output_node_name);
1010
1011   return hw_index;
1012 }
1013
1014 void
1015 vnet_delete_hw_interface (vnet_main_t * vnm, u32 hw_if_index)
1016 {
1017   vnet_interface_main_t *im = &vnm->interface_main;
1018   vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
1019   vlib_main_t *vm = vnm->vlib_main;
1020   vnet_device_class_t *dev_class = vnet_get_device_class (vnm,
1021                                                           hw->dev_class_index);
1022   /* If it is up, mark it down. */
1023   if (hw->flags != 0)
1024     vnet_hw_interface_set_flags (vnm, hw_if_index, /* flags */ 0);
1025
1026   /* Call delete callbacks. */
1027   call_hw_interface_add_del_callbacks (vnm, hw_if_index, /* is_create */ 0);
1028
1029   /* delete rx queues */
1030   vnet_hw_if_unregister_all_rx_queues (vnm, hw_if_index);
1031   vnet_hw_if_update_runtime_data (vnm, hw_if_index);
1032
1033   /* Delete any sub-interfaces. */
1034   {
1035     u32 id, sw_if_index;
1036     /* *INDENT-OFF* */
1037     hash_foreach (id, sw_if_index, hw->sub_interface_sw_if_index_by_id,
1038     ({
1039       vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
1040       u64 sup_and_sub_key =
1041         ((u64) (si->sup_sw_if_index) << 32) | (u64) si->sub.id;
1042       hash_unset_mem_free (&im->sw_if_index_by_sup_and_sub, &sup_and_sub_key);
1043       vnet_delete_sw_interface (vnm, sw_if_index);
1044     }));
1045     hash_free (hw->sub_interface_sw_if_index_by_id);
1046     /* *INDENT-ON* */
1047   }
1048
1049   /* Delete software interface corresponding to hardware interface. */
1050   vnet_delete_sw_interface (vnm, hw->sw_if_index);
1051
1052   if (dev_class->tx_function)
1053     {
1054       /* Put output/tx nodes into recycle pool */
1055       vnet_hw_interface_nodes_t *dn;
1056
1057       /* *INDENT-OFF* */
1058       foreach_vlib_main
1059         ({
1060           vnet_interface_output_runtime_t *rt =
1061             vlib_node_get_runtime_data (this_vlib_main, hw->output_node_index);
1062
1063           /* Mark node runtime as deleted so output node (if called)
1064            * will drop packets. */
1065           rt->is_deleted = 1;
1066         });
1067       /* *INDENT-ON* */
1068
1069       vlib_node_rename (vm, hw->output_node_index,
1070                         "interface-%d-output-deleted", hw_if_index);
1071       vlib_node_rename (vm, hw->tx_node_index, "interface-%d-tx-deleted",
1072                         hw_if_index);
1073       vec_add2 (im->deleted_hw_interface_nodes, dn, 1);
1074       dn->tx_node_index = hw->tx_node_index;
1075       dn->output_node_index = hw->output_node_index;
1076     }
1077
1078   hash_unset_mem (im->hw_interface_by_name, hw->name);
1079   vec_free (hw->name);
1080   vec_free (hw->hw_address);
1081   vec_free (hw->input_node_thread_index_by_queue);
1082   vec_free (hw->dq_runtime_index_by_queue);
1083   vec_free (hw->rx_queue_indices);
1084   pool_put (im->hw_interfaces, hw);
1085 }
1086
1087 void
1088 vnet_hw_interface_walk_sw (vnet_main_t * vnm,
1089                            u32 hw_if_index,
1090                            vnet_hw_sw_interface_walk_t fn, void *ctx)
1091 {
1092   vnet_hw_interface_t *hi;
1093   u32 id, sw_if_index;
1094
1095   hi = vnet_get_hw_interface (vnm, hw_if_index);
1096   /* the super first, then the sub interfaces */
1097   if (WALK_STOP == fn (vnm, hi->sw_if_index, ctx))
1098     return;
1099
1100   /* *INDENT-OFF* */
1101   hash_foreach (id, sw_if_index,
1102                 hi->sub_interface_sw_if_index_by_id,
1103   ({
1104     if (WALK_STOP == fn (vnm, sw_if_index, ctx))
1105       break;
1106   }));
1107   /* *INDENT-ON* */
1108 }
1109
1110 void
1111 vnet_hw_interface_walk (vnet_main_t * vnm,
1112                         vnet_hw_interface_walk_t fn, void *ctx)
1113 {
1114   vnet_interface_main_t *im;
1115   vnet_hw_interface_t *hi;
1116
1117   im = &vnm->interface_main;
1118
1119   /* *INDENT-OFF* */
1120   pool_foreach (hi, im->hw_interfaces)
1121    {
1122     if (WALK_STOP == fn(vnm, hi->hw_if_index, ctx))
1123       break;
1124   }
1125   /* *INDENT-ON* */
1126 }
1127
1128 void
1129 vnet_sw_interface_walk (vnet_main_t * vnm,
1130                         vnet_sw_interface_walk_t fn, void *ctx)
1131 {
1132   vnet_interface_main_t *im;
1133   vnet_sw_interface_t *si;
1134
1135   im = &vnm->interface_main;
1136
1137   /* *INDENT-OFF* */
1138   pool_foreach (si, im->sw_interfaces)
1139   {
1140     if (WALK_STOP == fn (vnm, si, ctx))
1141       break;
1142   }
1143   /* *INDENT-ON* */
1144 }
1145
1146 void
1147 vnet_hw_interface_init_for_class (vnet_main_t * vnm, u32 hw_if_index,
1148                                   u32 hw_class_index, u32 hw_instance)
1149 {
1150   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1151   vnet_hw_interface_class_t *hc =
1152     vnet_get_hw_interface_class (vnm, hw_class_index);
1153
1154   hi->hw_class_index = hw_class_index;
1155   hi->hw_instance = hw_instance;
1156   setup_output_node (vnm->vlib_main, hi->output_node_index, hc);
1157 }
1158
1159 static clib_error_t *
1160 vnet_hw_interface_set_class_helper (vnet_main_t * vnm, u32 hw_if_index,
1161                                     u32 hw_class_index, u32 redistribute)
1162 {
1163   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1164   vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, hi->sw_if_index);
1165   vnet_hw_interface_class_t *old_class =
1166     vnet_get_hw_interface_class (vnm, hi->hw_class_index);
1167   vnet_hw_interface_class_t *new_class =
1168     vnet_get_hw_interface_class (vnm, hw_class_index);
1169   vnet_device_class_t *dev_class =
1170     vnet_get_device_class (vnm, hi->dev_class_index);
1171   clib_error_t *error = 0;
1172
1173   /* New class equals old class?  Nothing to do. */
1174   if (hi->hw_class_index == hw_class_index)
1175     return 0;
1176
1177   /* No need (and incorrect since admin up flag may be set) to do error checking when
1178      receiving unserialize message. */
1179   if (redistribute)
1180     {
1181       if (si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
1182         return clib_error_return (0,
1183                                   "%v must be admin down to change class from %s to %s",
1184                                   hi->name, old_class->name, new_class->name);
1185
1186       /* Make sure interface supports given class. */
1187       if ((new_class->is_valid_class_for_interface
1188            && !new_class->is_valid_class_for_interface (vnm, hw_if_index,
1189                                                         hw_class_index))
1190           || (dev_class->is_valid_class_for_interface
1191               && !dev_class->is_valid_class_for_interface (vnm, hw_if_index,
1192                                                            hw_class_index)))
1193         return clib_error_return (0,
1194                                   "%v class cannot be changed from %s to %s",
1195                                   hi->name, old_class->name, new_class->name);
1196
1197     }
1198
1199   if (old_class->hw_class_change)
1200     old_class->hw_class_change (vnm, hw_if_index, old_class->index,
1201                                 new_class->index);
1202
1203   vnet_hw_interface_init_for_class (vnm, hw_if_index, new_class->index,
1204                                     /* instance */ ~0);
1205
1206   if (new_class->hw_class_change)
1207     new_class->hw_class_change (vnm, hw_if_index, old_class->index,
1208                                 new_class->index);
1209
1210   if (dev_class->hw_class_change)
1211     dev_class->hw_class_change (vnm, hw_if_index, new_class->index);
1212
1213   return error;
1214 }
1215
1216 clib_error_t *
1217 vnet_hw_interface_set_class (vnet_main_t * vnm, u32 hw_if_index,
1218                              u32 hw_class_index)
1219 {
1220   return vnet_hw_interface_set_class_helper (vnm, hw_if_index, hw_class_index,
1221                                              /* redistribute */ 1);
1222 }
1223
1224 static int
1225 vnet_hw_interface_rx_redirect_to_node_helper (vnet_main_t * vnm,
1226                                               u32 hw_if_index,
1227                                               u32 node_index,
1228                                               u32 redistribute)
1229 {
1230   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1231   vnet_device_class_t *dev_class = vnet_get_device_class
1232     (vnm, hi->dev_class_index);
1233
1234   if (dev_class->rx_redirect_to_node)
1235     {
1236       dev_class->rx_redirect_to_node (vnm, hw_if_index, node_index);
1237       return 0;
1238     }
1239
1240   return VNET_API_ERROR_UNIMPLEMENTED;
1241 }
1242
1243 int
1244 vnet_hw_interface_rx_redirect_to_node (vnet_main_t * vnm, u32 hw_if_index,
1245                                        u32 node_index)
1246 {
1247   return vnet_hw_interface_rx_redirect_to_node_helper (vnm, hw_if_index,
1248                                                        node_index,
1249                                                        1 /* redistribute */ );
1250 }
1251
1252 word
1253 vnet_sw_interface_compare (vnet_main_t * vnm,
1254                            uword sw_if_index0, uword sw_if_index1)
1255 {
1256   vnet_sw_interface_t *sup0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1257   vnet_sw_interface_t *sup1 = vnet_get_sup_sw_interface (vnm, sw_if_index1);
1258   vnet_hw_interface_t *h0 = vnet_get_hw_interface (vnm, sup0->hw_if_index);
1259   vnet_hw_interface_t *h1 = vnet_get_hw_interface (vnm, sup1->hw_if_index);
1260
1261   if (h0 != h1)
1262     return vec_cmp (h0->name, h1->name);
1263   return (word) h0->hw_instance - (word) h1->hw_instance;
1264 }
1265
1266 word
1267 vnet_hw_interface_compare (vnet_main_t * vnm,
1268                            uword hw_if_index0, uword hw_if_index1)
1269 {
1270   vnet_hw_interface_t *h0 = vnet_get_hw_interface (vnm, hw_if_index0);
1271   vnet_hw_interface_t *h1 = vnet_get_hw_interface (vnm, hw_if_index1);
1272
1273   if (h0 != h1)
1274     return vec_cmp (h0->name, h1->name);
1275   return (word) h0->hw_instance - (word) h1->hw_instance;
1276 }
1277
1278 int
1279 vnet_sw_interface_is_p2p (vnet_main_t * vnm, u32 sw_if_index)
1280 {
1281   vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
1282   if ((si->type == VNET_SW_INTERFACE_TYPE_P2P) ||
1283       (si->type == VNET_SW_INTERFACE_TYPE_PIPE))
1284     return 1;
1285
1286   vnet_hw_interface_t *hw = vnet_get_sup_hw_interface (vnm, sw_if_index);
1287   vnet_hw_interface_class_t *hc =
1288     vnet_get_hw_interface_class (vnm, hw->hw_class_index);
1289
1290   return (hc->flags & VNET_HW_INTERFACE_CLASS_FLAG_P2P);
1291 }
1292
1293 int
1294 vnet_sw_interface_is_nbma (vnet_main_t * vnm, u32 sw_if_index)
1295 {
1296   vnet_hw_interface_t *hw = vnet_get_sup_hw_interface (vnm, sw_if_index);
1297   vnet_hw_interface_class_t *hc =
1298     vnet_get_hw_interface_class (vnm, hw->hw_class_index);
1299
1300   return (hc->flags & VNET_HW_INTERFACE_CLASS_FLAG_NBMA);
1301 }
1302
1303 clib_error_t *
1304 vnet_interface_init (vlib_main_t * vm)
1305 {
1306   vnet_main_t *vnm = vnet_get_main ();
1307   vnet_interface_main_t *im = &vnm->interface_main;
1308   vlib_buffer_t *b = 0;
1309   vnet_buffer_opaque_t *o = 0;
1310   clib_error_t *error;
1311
1312   /*
1313    * Keep people from shooting themselves in the foot.
1314    */
1315   if (sizeof (b->opaque) != sizeof (vnet_buffer_opaque_t))
1316     {
1317 #define _(a) if (sizeof(o->a) > sizeof (o->unused))                     \
1318       clib_warning                                                      \
1319         ("FATAL: size of opaque union subtype %s is %d (max %d)",       \
1320          #a, sizeof(o->a), sizeof (o->unused));
1321       foreach_buffer_opaque_union_subtype;
1322 #undef _
1323
1324       return clib_error_return
1325         (0, "FATAL: size of vlib buffer opaque %d, size of vnet opaque %d",
1326          sizeof (b->opaque), sizeof (vnet_buffer_opaque_t));
1327     }
1328
1329   clib_spinlock_init (&im->sw_if_counter_lock);
1330   clib_spinlock_lock (&im->sw_if_counter_lock); /* should be no need */
1331
1332   vec_validate (im->sw_if_counters, VNET_N_SIMPLE_INTERFACE_COUNTER - 1);
1333 #define _(E,n,p)                                                        \
1334   im->sw_if_counters[VNET_INTERFACE_COUNTER_##E].name = #n;             \
1335   im->sw_if_counters[VNET_INTERFACE_COUNTER_##E].stat_segment_name = "/" #p "/" #n;
1336   foreach_simple_interface_counter_name
1337 #undef _
1338     vec_validate (im->combined_sw_if_counters,
1339                   VNET_N_COMBINED_INTERFACE_COUNTER - 1);
1340 #define _(E,n,p)                                                        \
1341   im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_##E].name = #n;    \
1342   im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_##E].stat_segment_name = "/" #p "/" #n;
1343   foreach_combined_interface_counter_name
1344 #undef _
1345     clib_spinlock_unlock (&im->sw_if_counter_lock);
1346
1347   im->device_class_by_name = hash_create_string ( /* size */ 0,
1348                                                  sizeof (uword));
1349   {
1350     vnet_device_class_t *c;
1351
1352     c = vnm->device_class_registrations;
1353
1354     while (c)
1355       {
1356         c->index = vec_len (im->device_classes);
1357         hash_set_mem (im->device_class_by_name, c->name, c->index);
1358
1359         if (c->tx_fn_registrations)
1360           {
1361             vlib_node_fn_registration_t *fnr = c->tx_fn_registrations;
1362             int priority = -1;
1363
1364             /* to avoid confusion, please remove ".tx_function" statement
1365                from VNET_DEVICE_CLASS() if using function candidates */
1366             ASSERT (c->tx_function == 0);
1367
1368             while (fnr)
1369               {
1370                 if (fnr->priority > priority)
1371                   {
1372                     priority = fnr->priority;
1373                     c->tx_function = fnr->function;
1374                   }
1375                 fnr = fnr->next_registration;
1376               }
1377           }
1378
1379         vec_add1 (im->device_classes, c[0]);
1380         c = c->next_class_registration;
1381       }
1382   }
1383
1384   im->hw_interface_class_by_name = hash_create_string ( /* size */ 0,
1385                                                        sizeof (uword));
1386
1387   im->rxq_index_by_hw_if_index_and_queue_id =
1388     hash_create_mem (0, sizeof (u64), sizeof (u32));
1389   im->sw_if_index_by_sup_and_sub = hash_create_mem (0, sizeof (u64),
1390                                                     sizeof (uword));
1391   {
1392     vnet_hw_interface_class_t *c;
1393
1394     c = vnm->hw_interface_class_registrations;
1395
1396     while (c)
1397       {
1398         c->index = vec_len (im->hw_interface_classes);
1399         hash_set_mem (im->hw_interface_class_by_name, c->name, c->index);
1400
1401         if (NULL == c->build_rewrite)
1402           c->build_rewrite = default_build_rewrite;
1403         if (NULL == c->update_adjacency)
1404           c->update_adjacency = default_update_adjacency;
1405
1406         vec_add1 (im->hw_interface_classes, c[0]);
1407         c = c->next_class_registration;
1408       }
1409   }
1410
1411   /* init per-thread data */
1412   vec_validate_aligned (im->per_thread_data, vlib_num_workers (),
1413                         CLIB_CACHE_LINE_BYTES);
1414
1415   if ((error = vlib_call_init_function (vm, vnet_interface_cli_init)))
1416     return error;
1417
1418   vnm->interface_tag_by_sw_if_index = hash_create (0, sizeof (uword));
1419
1420 #if VLIB_BUFFER_TRACE_TRAJECTORY > 0
1421   if ((error = vlib_call_init_function (vm, trajectory_trace_init)))
1422     return error;
1423 #endif
1424
1425   return 0;
1426 }
1427
1428 VLIB_INIT_FUNCTION (vnet_interface_init);
1429
1430 /* Kludge to renumber interface names [only!] */
1431 int
1432 vnet_interface_name_renumber (u32 sw_if_index, u32 new_show_dev_instance)
1433 {
1434   int rv;
1435   vnet_main_t *vnm = vnet_get_main ();
1436   vnet_interface_main_t *im = &vnm->interface_main;
1437   vnet_hw_interface_t *hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
1438
1439   vnet_device_class_t *dev_class = vnet_get_device_class
1440     (vnm, hi->dev_class_index);
1441
1442   if (dev_class->name_renumber == 0 || dev_class->format_device_name == 0)
1443     return VNET_API_ERROR_UNIMPLEMENTED;
1444
1445   rv = dev_class->name_renumber (hi, new_show_dev_instance);
1446
1447   if (rv)
1448     return rv;
1449
1450   hash_unset_mem (im->hw_interface_by_name, hi->name);
1451   vec_free (hi->name);
1452   /* Use the mapping we set up to call it Ishmael */
1453   hi->name = format (0, "%U", dev_class->format_device_name,
1454                      hi->dev_instance);
1455
1456   hash_set_mem (im->hw_interface_by_name, hi->name, hi->hw_if_index);
1457   return rv;
1458 }
1459
1460 clib_error_t *
1461 vnet_rename_interface (vnet_main_t * vnm, u32 hw_if_index, char *new_name)
1462 {
1463   vnet_interface_main_t *im = &vnm->interface_main;
1464   vlib_main_t *vm = vnm->vlib_main;
1465   vnet_hw_interface_t *hw;
1466   u8 *old_name;
1467   clib_error_t *error = 0;
1468
1469   hw = vnet_get_hw_interface (vnm, hw_if_index);
1470   if (!hw)
1471     {
1472       return clib_error_return (0,
1473                                 "unable to find hw interface for index %u",
1474                                 hw_if_index);
1475     }
1476
1477   old_name = hw->name;
1478
1479   /* set new hw->name */
1480   hw->name = format (0, "%s", new_name);
1481
1482   /* remove the old name to hw_if_index mapping and install the new one */
1483   hash_unset_mem (im->hw_interface_by_name, old_name);
1484   hash_set_mem (im->hw_interface_by_name, hw->name, hw_if_index);
1485
1486   /* rename tx/output nodes */
1487   vlib_node_rename (vm, hw->tx_node_index, "%v-tx", hw->name);
1488   vlib_node_rename (vm, hw->output_node_index, "%v-output", hw->name);
1489
1490   /* free the old name vector */
1491   vec_free (old_name);
1492
1493   return error;
1494 }
1495
1496 clib_error_t *
1497 vnet_hw_interface_add_del_mac_address (vnet_main_t * vnm,
1498                                        u32 hw_if_index,
1499                                        const u8 * mac_address, u8 is_add)
1500 {
1501   clib_error_t *error = 0;
1502   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1503
1504   vnet_device_class_t *dev_class =
1505     vnet_get_device_class (vnm, hi->dev_class_index);
1506
1507   if (!hi->hw_address)
1508     {
1509       error =
1510         clib_error_return
1511         (0, "Secondary MAC Addresses not supported for interface index %u",
1512          hw_if_index);
1513       goto done;
1514     }
1515
1516   if (dev_class->mac_addr_add_del_function)
1517     error = dev_class->mac_addr_add_del_function (hi, mac_address, is_add);
1518
1519   if (!error)
1520     {
1521       vnet_hw_interface_class_t *hw_class;
1522
1523       hw_class = vnet_get_hw_interface_class (vnm, hi->hw_class_index);
1524
1525       if (NULL != hw_class->mac_addr_add_del_function)
1526         error = hw_class->mac_addr_add_del_function (hi, mac_address, is_add);
1527     }
1528
1529   /* If no errors, add to the list of secondary MACs on the ethernet intf */
1530   if (!error)
1531     ethernet_interface_add_del_address (&ethernet_main, hw_if_index,
1532                                         mac_address, is_add);
1533
1534 done:
1535   if (error)
1536     log_err ("hw_add_del_mac_address: %U", format_clib_error, error);
1537   return error;
1538 }
1539
1540 static clib_error_t *
1541 vnet_hw_interface_change_mac_address_helper (vnet_main_t * vnm,
1542                                              u32 hw_if_index,
1543                                              const u8 * mac_address)
1544 {
1545   clib_error_t *error = 0;
1546   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1547
1548   if (hi->hw_address)
1549     {
1550       u8 *old_address = vec_dup (hi->hw_address);
1551       vnet_device_class_t *dev_class =
1552         vnet_get_device_class (vnm, hi->dev_class_index);
1553       if (dev_class->mac_addr_change_function)
1554         {
1555           error =
1556             dev_class->mac_addr_change_function (hi, old_address,
1557                                                  mac_address);
1558         }
1559       if (!error)
1560         {
1561           vnet_hw_interface_class_t *hw_class;
1562
1563           hw_class = vnet_get_hw_interface_class (vnm, hi->hw_class_index);
1564
1565           if (NULL != hw_class->mac_addr_change_function)
1566             hw_class->mac_addr_change_function (hi, old_address, mac_address);
1567         }
1568       else
1569         {
1570           error =
1571             clib_error_return (0,
1572                                "MAC Address Change is not supported on this interface");
1573         }
1574       vec_free (old_address);
1575     }
1576   else
1577     {
1578       error =
1579         clib_error_return (0,
1580                            "mac address change is not supported for interface index %u",
1581                            hw_if_index);
1582     }
1583   return error;
1584 }
1585
1586 clib_error_t *
1587 vnet_hw_interface_change_mac_address (vnet_main_t * vnm, u32 hw_if_index,
1588                                       const u8 * mac_address)
1589 {
1590   return vnet_hw_interface_change_mac_address_helper
1591     (vnm, hw_if_index, mac_address);
1592 }
1593
1594 /* update the unnumbered state of an interface*/
1595 void
1596 vnet_sw_interface_update_unnumbered (u32 unnumbered_sw_if_index,
1597                                      u32 ip_sw_if_index, u8 enable)
1598 {
1599   vnet_main_t *vnm = vnet_get_main ();
1600   vnet_sw_interface_t *si;
1601   u32 was_unnum;
1602
1603   si = vnet_get_sw_interface (vnm, unnumbered_sw_if_index);
1604   was_unnum = (si->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED);
1605
1606   if (enable)
1607     {
1608       si->flags |= VNET_SW_INTERFACE_FLAG_UNNUMBERED;
1609       si->unnumbered_sw_if_index = ip_sw_if_index;
1610
1611       ip4_main.lookup_main.if_address_pool_index_by_sw_if_index
1612         [unnumbered_sw_if_index] =
1613         ip4_main.
1614         lookup_main.if_address_pool_index_by_sw_if_index[ip_sw_if_index];
1615       ip6_main.
1616         lookup_main.if_address_pool_index_by_sw_if_index
1617         [unnumbered_sw_if_index] =
1618         ip6_main.
1619         lookup_main.if_address_pool_index_by_sw_if_index[ip_sw_if_index];
1620     }
1621   else
1622     {
1623       si->flags &= ~(VNET_SW_INTERFACE_FLAG_UNNUMBERED);
1624       si->unnumbered_sw_if_index = (u32) ~ 0;
1625
1626       ip4_main.lookup_main.if_address_pool_index_by_sw_if_index
1627         [unnumbered_sw_if_index] = ~0;
1628       ip6_main.lookup_main.if_address_pool_index_by_sw_if_index
1629         [unnumbered_sw_if_index] = ~0;
1630     }
1631
1632   if (was_unnum != (si->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED))
1633     {
1634       ip4_sw_interface_enable_disable (unnumbered_sw_if_index, enable);
1635       ip6_sw_interface_enable_disable (unnumbered_sw_if_index, enable);
1636     }
1637 }
1638
1639 vnet_l3_packet_type_t
1640 vnet_link_to_l3_proto (vnet_link_t link)
1641 {
1642   switch (link)
1643     {
1644     case VNET_LINK_IP4:
1645       return (VNET_L3_PACKET_TYPE_IP4);
1646     case VNET_LINK_IP6:
1647       return (VNET_L3_PACKET_TYPE_IP6);
1648     case VNET_LINK_MPLS:
1649       return (VNET_L3_PACKET_TYPE_MPLS);
1650     case VNET_LINK_ARP:
1651       return (VNET_L3_PACKET_TYPE_ARP);
1652     case VNET_LINK_ETHERNET:
1653     case VNET_LINK_NSH:
1654       ASSERT (0);
1655       break;
1656     }
1657   ASSERT (0);
1658   return (0);
1659 }
1660
1661 vnet_mtu_t
1662 vnet_link_to_mtu (vnet_link_t link)
1663 {
1664   switch (link)
1665     {
1666     case VNET_LINK_IP4:
1667       return (VNET_MTU_IP4);
1668     case VNET_LINK_IP6:
1669       return (VNET_MTU_IP6);
1670     case VNET_LINK_MPLS:
1671       return (VNET_MTU_MPLS);
1672     default:
1673       return (VNET_MTU_L3);
1674     }
1675 }
1676
1677 u8 *
1678 default_build_rewrite (vnet_main_t * vnm,
1679                        u32 sw_if_index,
1680                        vnet_link_t link_type, const void *dst_address)
1681 {
1682   return (NULL);
1683 }
1684
1685 void
1686 default_update_adjacency (vnet_main_t * vnm, u32 sw_if_index, u32 ai)
1687 {
1688   ip_adjacency_t *adj;
1689
1690   adj = adj_get (ai);
1691
1692   switch (adj->lookup_next_index)
1693     {
1694     case IP_LOOKUP_NEXT_GLEAN:
1695       adj_glean_update_rewrite (ai);
1696       break;
1697     case IP_LOOKUP_NEXT_ARP:
1698     case IP_LOOKUP_NEXT_BCAST:
1699       /*
1700        * default rewrite in neighbour adj
1701        */
1702       adj_nbr_update_rewrite
1703         (ai,
1704          ADJ_NBR_REWRITE_FLAG_COMPLETE,
1705          vnet_build_rewrite_for_sw_interface (vnm,
1706                                               sw_if_index,
1707                                               adj_get_link_type (ai), NULL));
1708       break;
1709     case IP_LOOKUP_NEXT_MCAST:
1710       /*
1711        * mcast traffic also uses default rewrite string with no mcast
1712        * switch time updates.
1713        */
1714       adj_mcast_update_rewrite
1715         (ai,
1716          vnet_build_rewrite_for_sw_interface (vnm,
1717                                               sw_if_index,
1718                                               adj_get_link_type (ai),
1719                                               NULL), 0);
1720       break;
1721     case IP_LOOKUP_NEXT_DROP:
1722     case IP_LOOKUP_NEXT_PUNT:
1723     case IP_LOOKUP_NEXT_LOCAL:
1724     case IP_LOOKUP_NEXT_REWRITE:
1725     case IP_LOOKUP_NEXT_MCAST_MIDCHAIN:
1726     case IP_LOOKUP_NEXT_MIDCHAIN:
1727     case IP_LOOKUP_NEXT_ICMP_ERROR:
1728     case IP_LOOKUP_N_NEXT:
1729       ASSERT (0);
1730       break;
1731     }
1732 }
1733
1734 clib_error_t *
1735 vnet_hw_interface_set_rss_queues (vnet_main_t * vnm,
1736                                   vnet_hw_interface_t * hi,
1737                                   clib_bitmap_t * bitmap)
1738 {
1739   clib_error_t *error = 0;
1740   vnet_device_class_t *dev_class =
1741     vnet_get_device_class (vnm, hi->dev_class_index);
1742
1743   if (dev_class->set_rss_queues_function)
1744     {
1745       if (clib_bitmap_count_set_bits (bitmap) == 0)
1746         {
1747           error = clib_error_return (0,
1748                                      "must assign at least one valid rss queue");
1749           goto done;
1750         }
1751
1752       error = dev_class->set_rss_queues_function (vnm, hi, bitmap);
1753     }
1754   else
1755     {
1756       error = clib_error_return (0,
1757                                  "setting rss queues is not supported on this interface");
1758     }
1759
1760   if (!error)
1761     {
1762       clib_bitmap_free (hi->rss_queues);
1763       hi->rss_queues = clib_bitmap_dup (bitmap);
1764     }
1765
1766 done:
1767   if (error)
1768     log_err ("hw_set_rss_queues: %U", format_clib_error, error);
1769   return error;
1770 }
1771
1772 int collect_detailed_interface_stats_flag = 0;
1773
1774 void
1775 collect_detailed_interface_stats_flag_set (void)
1776 {
1777   collect_detailed_interface_stats_flag = 1;
1778 }
1779
1780 void
1781 collect_detailed_interface_stats_flag_clear (void)
1782 {
1783   collect_detailed_interface_stats_flag = 0;
1784 }
1785
1786 static clib_error_t *
1787 collect_detailed_interface_stats_cli (vlib_main_t * vm,
1788                                       unformat_input_t * input,
1789                                       vlib_cli_command_t * cmd)
1790 {
1791   unformat_input_t _line_input, *line_input = &_line_input;
1792   clib_error_t *error = NULL;
1793
1794   /* Get a line of input. */
1795   if (!unformat_user (input, unformat_line_input, line_input))
1796     return clib_error_return (0, "expected enable | disable");
1797
1798   while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
1799     {
1800       if (unformat (line_input, "enable") || unformat (line_input, "on"))
1801         collect_detailed_interface_stats_flag_set ();
1802       else if (unformat (line_input, "disable")
1803                || unformat (line_input, "off"))
1804         collect_detailed_interface_stats_flag_clear ();
1805       else
1806         {
1807           error = clib_error_return (0, "unknown input `%U'",
1808                                      format_unformat_error, line_input);
1809           goto done;
1810         }
1811     }
1812
1813 done:
1814   unformat_free (line_input);
1815   return error;
1816 }
1817
1818 /* *INDENT-OFF* */
1819 VLIB_CLI_COMMAND (collect_detailed_interface_stats_command, static) = {
1820   .path = "interface collect detailed-stats",
1821   .short_help = "interface collect detailed-stats <enable|disable>",
1822   .function = collect_detailed_interface_stats_cli,
1823 };
1824 /* *INDENT-ON* */
1825
1826 /*
1827  * fd.io coding-style-patch-verification: ON
1828  *
1829  * Local Variables:
1830  * eval: (c-set-style "gnu")
1831  * End:
1832  */