src/vnet/interface.c

   1 /*
   2  * Copyright (c) 2015 Cisco and/or its affiliates.
   3  * Licensed under the Apache License, Version 2.0 (the "License");
   4  * you may not use this file except in compliance with the License.
   5  * You may obtain a copy of the License at:
   6  *
   7  *     http://www.apache.org/licenses/LICENSE-2.0
   8  *
   9  * Unless required by applicable law or agreed to in writing, software
  10  * distributed under the License is distributed on an "AS IS" BASIS,
  11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12  * See the License for the specific language governing permissions and
  13  * limitations under the License.
  14  */
  15 /*
  16  * interface.c: VNET interfaces/sub-interfaces
  17  *
  18  * Copyright (c) 2008 Eliot Dresselhaus
  19  *
  20  * Permission is hereby granted, free of charge, to any person obtaining
  21  * a copy of this software and associated documentation files (the
  22  * "Software"), to deal in the Software without restriction, including
  23  * without limitation the rights to use, copy, modify, merge, publish,
  24  * distribute, sublicense, and/or sell copies of the Software, and to
  25  * permit persons to whom the Software is furnished to do so, subject to
  26  * the following conditions:
  27  *
  28  * The above copyright notice and this permission notice shall be
  29  * included in all copies or substantial portions of the Software.
  30  *
  31  *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  32  *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  33  *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  34  *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  35  *  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  36  *  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  37  *  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  38  */
  39
  40 #include <vnet/vnet.h>
  41 #include <vnet/plugin/plugin.h>
  42 #include <vnet/fib/ip6_fib.h>
  43 #include <vnet/adj/adj.h>
  44 #include <vnet/adj/adj_mcast.h>
  45 #include <vnet/l2/l2_input.h>
  46
  47 typedef enum vnet_interface_helper_flags_t_
  48 {
  49   VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE = (1 << 0),
  50   VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE = (1 << 1),
  51 } vnet_interface_helper_flags_t;
  52
  53 static clib_error_t *vnet_hw_interface_set_flags_helper (vnet_main_t * vnm,
  54                                                          u32 hw_if_index,
  55                                                          vnet_hw_interface_flags_t
  56                                                          flags,
  57                                                          vnet_interface_helper_flags_t
  58                                                          helper_flags);
  59
  60 static clib_error_t *vnet_sw_interface_set_flags_helper (vnet_main_t * vnm,
  61                                                          u32 sw_if_index,
  62                                                          vnet_sw_interface_flags_t
  63                                                          flags,
  64                                                          vnet_interface_helper_flags_t
  65                                                          helper_flags);
  66
  67 static clib_error_t *vnet_hw_interface_set_class_helper (vnet_main_t * vnm,
  68                                                          u32 hw_if_index,
  69                                                          u32 hw_class_index,
  70                                                          u32 redistribute);
  71
  72 typedef struct
  73 {
  74   /* Either sw or hw interface index. */
  75   u32 sw_hw_if_index;
  76
  77   /* Flags. */
  78   u32 flags;
  79 } vnet_sw_hw_interface_state_t;
  80
  81 static void
  82 serialize_vec_vnet_sw_hw_interface_state (serialize_main_t * m, va_list * va)
  83 {
  84   vnet_sw_hw_interface_state_t *s =
  85     va_arg (*va, vnet_sw_hw_interface_state_t *);
  86   u32 n = va_arg (*va, u32);
  87   u32 i;
  88   for (i = 0; i < n; i++)
  89     {
  90       serialize_integer (m, s[i].sw_hw_if_index,
  91                          sizeof (s[i].sw_hw_if_index));
  92       serialize_integer (m, s[i].flags, sizeof (s[i].flags));
  93     }
  94 }
  95
  96 static void
  97 unserialize_vec_vnet_sw_hw_interface_state (serialize_main_t * m,
  98                                             va_list * va)
  99 {
 100   vnet_sw_hw_interface_state_t *s =
 101     va_arg (*va, vnet_sw_hw_interface_state_t *);
 102   u32 n = va_arg (*va, u32);
 103   u32 i;
 104   for (i = 0; i < n; i++)
 105     {
 106       unserialize_integer (m, &s[i].sw_hw_if_index,
 107                            sizeof (s[i].sw_hw_if_index));
 108       unserialize_integer (m, &s[i].flags, sizeof (s[i].flags));
 109     }
 110 }
 111
 112 static vnet_sw_interface_flags_t
 113 vnet_hw_interface_flags_to_sw (vnet_hw_interface_flags_t hwf)
 114 {
 115   vnet_sw_interface_flags_t swf = VNET_SW_INTERFACE_FLAG_NONE;
 116
 117   if (hwf & VNET_HW_INTERFACE_FLAG_LINK_UP)
 118     swf |= VNET_SW_INTERFACE_FLAG_ADMIN_UP;
 119
 120   return (swf);
 121 }
 122
 123 void
 124 serialize_vnet_interface_state (serialize_main_t * m, va_list * va)
 125 {
 126   vnet_main_t *vnm = va_arg (*va, vnet_main_t *);
 127   vnet_sw_hw_interface_state_t *sts = 0, *st;
 128   vnet_sw_interface_t *sif;
 129   vnet_hw_interface_t *hif;
 130   vnet_interface_main_t *im = &vnm->interface_main;
 131
 132   /* Serialize hardware interface classes since they may have changed.
 133      Must do this before sending up/down flags. */
 134   /* *INDENT-OFF* */
 135   pool_foreach (hif, im->hw_interfaces, ({
 136     vnet_hw_interface_class_t * hw_class = vnet_get_hw_interface_class (vnm, hif->hw_class_index);
 137     serialize_cstring (m, hw_class->name);
 138   }));
 139   /* *INDENT-ON* */
 140
 141   /* Send sw/hw interface state when non-zero. */
 142   /* *INDENT-OFF* */
 143   pool_foreach (sif, im->sw_interfaces, ({
 144     if (sif->flags != 0)
 145       {
 146         vec_add2 (sts, st, 1);
 147         st->sw_hw_if_index = sif->sw_if_index;
 148         st->flags = sif->flags;
 149       }
 150   }));
 151   /* *INDENT-ON* */
 152
 153   vec_serialize (m, sts, serialize_vec_vnet_sw_hw_interface_state);
 154
 155   if (sts)
 156     _vec_len (sts) = 0;
 157
 158   /* *INDENT-OFF* */
 159   pool_foreach (hif, im->hw_interfaces, ({
 160     if (hif->flags != 0)
 161       {
 162         vec_add2 (sts, st, 1);
 163         st->sw_hw_if_index = hif->hw_if_index;
 164         st->flags = vnet_hw_interface_flags_to_sw(hif->flags);
 165       }
 166   }));
 167   /* *INDENT-ON* */
 168
 169   vec_serialize (m, sts, serialize_vec_vnet_sw_hw_interface_state);
 170
 171   vec_free (sts);
 172 }
 173
 174 static vnet_hw_interface_flags_t
 175 vnet_sw_interface_flags_to_hw (vnet_sw_interface_flags_t swf)
 176 {
 177   vnet_hw_interface_flags_t hwf = VNET_HW_INTERFACE_FLAG_NONE;
 178
 179   if (swf & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
 180     hwf |= VNET_HW_INTERFACE_FLAG_LINK_UP;
 181
 182   return (hwf);
 183 }
 184
 185 void
 186 unserialize_vnet_interface_state (serialize_main_t * m, va_list * va)
 187 {
 188   vnet_main_t *vnm = va_arg (*va, vnet_main_t *);
 189   vnet_sw_hw_interface_state_t *sts = 0, *st;
 190
 191   /* First set interface hardware class. */
 192   {
 193     vnet_interface_main_t *im = &vnm->interface_main;
 194     vnet_hw_interface_t *hif;
 195     char *class_name;
 196     uword *p;
 197     clib_error_t *error;
 198
 199     /* *INDENT-OFF* */
 200     pool_foreach (hif, im->hw_interfaces, ({
 201       unserialize_cstring (m, &class_name);
 202       p = hash_get_mem (im->hw_interface_class_by_name, class_name);
 203       if (p)
 204         {
 205           error = vnet_hw_interface_set_class_helper
 206             (vnm, hif->hw_if_index, p[0], /* redistribute */ 0);
 207         }
 208       else
 209         error = clib_error_return (0, "hw class %s AWOL?", class_name);
 210
 211       if (error)
 212         clib_error_report (error);
 213       vec_free (class_name);
 214     }));
 215     /* *INDENT-ON* */
 216   }
 217
 218   vec_unserialize (m, &sts, unserialize_vec_vnet_sw_hw_interface_state);
 219   vec_foreach (st, sts)
 220     vnet_sw_interface_set_flags_helper (vnm, st->sw_hw_if_index, st->flags,
 221                                         /* no distribute */ 0);
 222   vec_free (sts);
 223
 224   vec_unserialize (m, &sts, unserialize_vec_vnet_sw_hw_interface_state);
 225   vec_foreach (st, sts)
 226   {
 227     vnet_hw_interface_set_flags_helper
 228       (vnm, st->sw_hw_if_index, vnet_sw_interface_flags_to_hw (st->flags),
 229        /* no distribute */ 0);
 230   }
 231   vec_free (sts);
 232 }
 233
 234 static clib_error_t *
 235 call_elf_section_interface_callbacks (vnet_main_t * vnm, u32 if_index,
 236                                       u32 flags,
 237                                       _vnet_interface_function_list_elt_t **
 238                                       elts)
 239 {
 240   _vnet_interface_function_list_elt_t *elt;
 241   vnet_interface_function_priority_t prio;
 242   clib_error_t *error = 0;
 243
 244   for (prio = VNET_ITF_FUNC_PRIORITY_LOW;
 245        prio <= VNET_ITF_FUNC_PRIORITY_HIGH; prio++)
 246     {
 247       elt = elts[prio];
 248
 249       while (elt)
 250         {
 251           error = elt->fp (vnm, if_index, flags);
 252           if (error)
 253             return error;
 254           elt = elt->next_interface_function;
 255         }
 256     }
 257   return error;
 258 }
 259
 260 static clib_error_t *
 261 call_hw_interface_add_del_callbacks (vnet_main_t * vnm, u32 hw_if_index,
 262                                      u32 is_create)
 263 {
 264   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
 265   vnet_hw_interface_class_t *hw_class =
 266     vnet_get_hw_interface_class (vnm, hi->hw_class_index);
 267   vnet_device_class_t *dev_class =
 268     vnet_get_device_class (vnm, hi->dev_class_index);
 269   clib_error_t *error = 0;
 270
 271   if (hw_class->interface_add_del_function
 272       && (error =
 273           hw_class->interface_add_del_function (vnm, hw_if_index, is_create)))
 274     return error;
 275
 276   if (dev_class->interface_add_del_function
 277       && (error =
 278           dev_class->interface_add_del_function (vnm, hw_if_index,
 279                                                  is_create)))
 280     return error;
 281
 282   error = call_elf_section_interface_callbacks
 283     (vnm, hw_if_index, is_create, vnm->hw_interface_add_del_functions);
 284
 285   return error;
 286 }
 287
 288 static clib_error_t *
 289 call_sw_interface_add_del_callbacks (vnet_main_t * vnm, u32 sw_if_index,
 290                                      u32 is_create)
 291 {
 292   return call_elf_section_interface_callbacks
 293     (vnm, sw_if_index, is_create, vnm->sw_interface_add_del_functions);
 294 }
 295
 296 static clib_error_t *
 297 vnet_hw_interface_set_flags_helper (vnet_main_t * vnm, u32 hw_if_index,
 298                                     vnet_hw_interface_flags_t flags,
 299                                     vnet_interface_helper_flags_t
 300                                     helper_flags)
 301 {
 302   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
 303   vnet_hw_interface_class_t *hw_class =
 304     vnet_get_hw_interface_class (vnm, hi->hw_class_index);
 305   u32 mask;
 306   clib_error_t *error = 0;
 307   u32 is_create =
 308     (helper_flags & VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE) != 0;
 309
 310   mask =
 311     (VNET_HW_INTERFACE_FLAG_LINK_UP | VNET_HW_INTERFACE_FLAG_DUPLEX_MASK);
 312   flags &= mask;
 313
 314   /* Call hardware interface add/del callbacks. */
 315   if (is_create)
 316     call_hw_interface_add_del_callbacks (vnm, hw_if_index, is_create);
 317
 318   /* Already in the desired state? */
 319   if (!is_create && (hi->flags & mask) == flags)
 320     goto done;
 321
 322   if ((hi->flags & VNET_HW_INTERFACE_FLAG_LINK_UP) !=
 323       (flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
 324     {
 325       /* Do hardware class (e.g. ethernet). */
 326       if (hw_class->link_up_down_function
 327           && (error = hw_class->link_up_down_function (vnm, hw_if_index,
 328                                                        flags)))
 329         goto done;
 330
 331       error = call_elf_section_interface_callbacks
 332         (vnm, hw_if_index, flags, vnm->hw_interface_link_up_down_functions);
 333
 334       if (error)
 335         goto done;
 336     }
 337
 338   hi->flags &= ~mask;
 339   hi->flags |= flags;
 340
 341 done:
 342   return error;
 343 }
 344
 345 static clib_error_t *
 346 vnet_sw_interface_set_flags_helper (vnet_main_t * vnm, u32 sw_if_index,
 347                                     vnet_sw_interface_flags_t flags,
 348                                     vnet_interface_helper_flags_t
 349                                     helper_flags)
 350 {
 351   vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
 352   u32 mask;
 353   clib_error_t *error = 0;
 354   u32 is_create =
 355     (helper_flags & VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE) != 0;
 356   u32 old_flags;
 357
 358   mask = VNET_SW_INTERFACE_FLAG_ADMIN_UP | VNET_SW_INTERFACE_FLAG_PUNT;
 359   flags &= mask;
 360
 361   if (is_create)
 362     {
 363       error =
 364         call_sw_interface_add_del_callbacks (vnm, sw_if_index, is_create);
 365       if (error)
 366         goto done;
 367
 368       if (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
 369         {
 370           /* Notify everyone when the interface is created as admin up */
 371           error = call_elf_section_interface_callbacks (vnm, sw_if_index,
 372                                                         flags,
 373                                                         vnm->
 374                                                         sw_interface_admin_up_down_functions);
 375           if (error)
 376             goto done;
 377         }
 378     }
 379   else
 380     {
 381       vnet_sw_interface_t *si_sup = si;
 382
 383       /* Check that super interface is in correct state. */
 384       if (si->type == VNET_SW_INTERFACE_TYPE_SUB)
 385         {
 386           si_sup = vnet_get_sw_interface (vnm, si->sup_sw_if_index);
 387
 388           /* Check to see if we're bringing down the soft interface and if it's parent is up */
 389           if ((flags != (si_sup->flags & mask)) &&
 390               (!((flags == 0)
 391                  && ((si_sup->flags & mask) ==
 392                      VNET_SW_INTERFACE_FLAG_ADMIN_UP))))
 393             {
 394               error = clib_error_return (0, "super-interface %U must be %U",
 395                                          format_vnet_sw_interface_name, vnm,
 396                                          si_sup,
 397                                          format_vnet_sw_interface_flags,
 398                                          flags);
 399               goto done;
 400             }
 401         }
 402
 403       /* Already in the desired state? */
 404       if ((si->flags & mask) == flags)
 405         goto done;
 406
 407       /* Sub-interfaces of hardware interfaces that do no redistribute,
 408          do not redistribute themselves. */
 409       if (si_sup->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
 410         {
 411           vnet_hw_interface_t *hi =
 412             vnet_get_hw_interface (vnm, si_sup->hw_if_index);
 413           vnet_device_class_t *dev_class =
 414             vnet_get_device_class (vnm, hi->dev_class_index);
 415           if (!dev_class->redistribute)
 416             helper_flags &=
 417               ~VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE;
 418         }
 419
 420       /* set the flags now before invoking the registered clients
 421        * so that the state they query is consistent with the state here notified */
 422       old_flags = si->flags;
 423       si->flags &= ~mask;
 424       si->flags |= flags;
 425       if ((flags | old_flags) & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
 426         error = call_elf_section_interface_callbacks
 427           (vnm, sw_if_index, flags,
 428            vnm->sw_interface_admin_up_down_functions);
 429
 430       if (error)
 431         {
 432           /* restore flags on error */
 433           si->flags = old_flags;
 434           goto done;
 435         }
 436
 437       if (si->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
 438         {
 439           vnet_hw_interface_t *hi =
 440             vnet_get_hw_interface (vnm, si->hw_if_index);
 441           vnet_hw_interface_class_t *hw_class =
 442             vnet_get_hw_interface_class (vnm, hi->hw_class_index);
 443           vnet_device_class_t *dev_class =
 444             vnet_get_device_class (vnm, hi->dev_class_index);
 445
 446           if ((flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) &&
 447               (si->flags & VNET_SW_INTERFACE_FLAG_ERROR))
 448             {
 449               error = clib_error_return (0, "Interface in the error state");
 450               goto done;
 451             }
 452
 453           /* save the si admin up flag */
 454           old_flags = si->flags;
 455
 456           /* update si admin up flag in advance if we are going admin down */
 457           if (!(flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
 458             si->flags &= ~VNET_SW_INTERFACE_FLAG_ADMIN_UP;
 459
 460           if (dev_class->admin_up_down_function
 461               && (error = dev_class->admin_up_down_function (vnm,
 462                                                              si->hw_if_index,
 463                                                              flags)))
 464             {
 465               /* restore si admin up flag to it's original state on errors */
 466               si->flags = old_flags;
 467               goto done;
 468             }
 469
 470           if (hw_class->admin_up_down_function
 471               && (error = hw_class->admin_up_down_function (vnm,
 472                                                             si->hw_if_index,
 473                                                             flags)))
 474             {
 475               /* restore si admin up flag to it's original state on errors */
 476               si->flags = old_flags;
 477               goto done;
 478             }
 479
 480           /* Admin down implies link down. */
 481           if (!(flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
 482               && (hi->flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
 483             vnet_hw_interface_set_flags_helper (vnm, si->hw_if_index,
 484                                                 hi->flags &
 485                                                 ~VNET_HW_INTERFACE_FLAG_LINK_UP,
 486                                                 helper_flags);
 487         }
 488     }
 489
 490   si->flags &= ~mask;
 491   si->flags |= flags;
 492
 493 done:
 494   return error;
 495 }
 496
 497 clib_error_t *
 498 vnet_hw_interface_set_flags (vnet_main_t * vnm, u32 hw_if_index,
 499                              vnet_hw_interface_flags_t flags)
 500 {
 501   return vnet_hw_interface_set_flags_helper
 502     (vnm, hw_if_index, flags,
 503      VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE);
 504 }
 505
 506 clib_error_t *
 507 vnet_sw_interface_set_flags (vnet_main_t * vnm, u32 sw_if_index,
 508                              vnet_sw_interface_flags_t flags)
 509 {
 510   return vnet_sw_interface_set_flags_helper
 511     (vnm, sw_if_index, flags,
 512      VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE);
 513 }
 514
 515 void
 516 vnet_sw_interface_admin_up (vnet_main_t * vnm, u32 sw_if_index)
 517 {
 518   u32 flags = vnet_sw_interface_get_flags (vnm, sw_if_index);
 519
 520   if (!(flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
 521     {
 522       flags |= VNET_SW_INTERFACE_FLAG_ADMIN_UP;
 523       vnet_sw_interface_set_flags (vnm, sw_if_index, flags);
 524     }
 525 }
 526
 527 void
 528 vnet_sw_interface_admin_down (vnet_main_t * vnm, u32 sw_if_index)
 529 {
 530   u32 flags = vnet_sw_interface_get_flags (vnm, sw_if_index);
 531
 532   if (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
 533     {
 534       flags &= ~(VNET_SW_INTERFACE_FLAG_ADMIN_UP);
 535       vnet_sw_interface_set_flags (vnm, sw_if_index, flags);
 536     }
 537 }
 538
 539 static u32
 540 vnet_create_sw_interface_no_callbacks (vnet_main_t * vnm,
 541                                        vnet_sw_interface_t * template)
 542 {
 543   vnet_interface_main_t *im = &vnm->interface_main;
 544   vnet_sw_interface_t *sw;
 545   u32 sw_if_index;
 546
 547   pool_get (im->sw_interfaces, sw);
 548   sw_if_index = sw - im->sw_interfaces;
 549
 550   sw[0] = template[0];
 551
 552   sw->flags = 0;
 553   sw->sw_if_index = sw_if_index;
 554   if (sw->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
 555     sw->sup_sw_if_index = sw->sw_if_index;
 556
 557   /* Allocate counters for this interface. */
 558   {
 559     u32 i;
 560
 561     vnet_interface_counter_lock (im);
 562
 563     for (i = 0; i < vec_len (im->sw_if_counters); i++)
 564       {
 565         vlib_validate_simple_counter (&im->sw_if_counters[i], sw_if_index);
 566         vlib_zero_simple_counter (&im->sw_if_counters[i], sw_if_index);
 567       }
 568
 569     for (i = 0; i < vec_len (im->combined_sw_if_counters); i++)
 570       {
 571         vlib_validate_combined_counter (&im->combined_sw_if_counters[i],
 572                                         sw_if_index);
 573         vlib_zero_combined_counter (&im->combined_sw_if_counters[i],
 574                                     sw_if_index);
 575       }
 576
 577     vnet_interface_counter_unlock (im);
 578   }
 579
 580   return sw_if_index;
 581 }
 582
 583 clib_error_t *
 584 vnet_create_sw_interface (vnet_main_t * vnm, vnet_sw_interface_t * template,
 585                           u32 * sw_if_index)
 586 {
 587   clib_error_t *error;
 588   vnet_hw_interface_t *hi;
 589   vnet_device_class_t *dev_class;
 590
 591   if (template->sub.eth.flags.two_tags == 1
 592       && template->sub.eth.flags.exact_match == 1
 593       && (template->sub.eth.flags.inner_vlan_id_any == 1
 594           || template->sub.eth.flags.outer_vlan_id_any == 1))
 595     {
 596       error = clib_error_return (0,
 597                                  "inner-dot1q any exact-match is unsupported");
 598       return error;
 599     }
 600
 601   hi = vnet_get_sup_hw_interface (vnm, template->sup_sw_if_index);
 602   dev_class = vnet_get_device_class (vnm, hi->dev_class_index);
 603
 604   if (template->type == VNET_SW_INTERFACE_TYPE_SUB &&
 605       dev_class->subif_add_del_function)
 606     {
 607       error = dev_class->subif_add_del_function (vnm, hi->hw_if_index,
 608                                                  (struct vnet_sw_interface_t
 609                                                   *) template, 1);
 610       if (error)
 611         return error;
 612     }
 613
 614   *sw_if_index = vnet_create_sw_interface_no_callbacks (vnm, template);
 615   error = vnet_sw_interface_set_flags_helper
 616     (vnm, *sw_if_index, template->flags,
 617      VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE);
 618
 619   if (error)
 620     {
 621       /* undo the work done by vnet_create_sw_interface_no_callbacks() */
 622       vnet_interface_main_t *im = &vnm->interface_main;
 623       vnet_sw_interface_t *sw =
 624         pool_elt_at_index (im->sw_interfaces, *sw_if_index);
 625       pool_put (im->sw_interfaces, sw);
 626     }
 627
 628   return error;
 629 }
 630
 631 void
 632 vnet_delete_sw_interface (vnet_main_t * vnm, u32 sw_if_index)
 633 {
 634   vnet_interface_main_t *im = &vnm->interface_main;
 635   vnet_sw_interface_t *sw =
 636     pool_elt_at_index (im->sw_interfaces, sw_if_index);
 637
 638   /* Check if the interface has config and is removed from L2 BD or XConnect */
 639   vlib_main_t *vm = vlib_get_main ();
 640   l2_input_config_t *config;
 641   if (sw_if_index < vec_len (l2input_main.configs))
 642     {
 643       config = vec_elt_at_index (l2input_main.configs, sw_if_index);
 644       if (config->xconnect)
 645         set_int_l2_mode (vm, vnm, MODE_L3, config->output_sw_if_index, 0,
 646                          L2_BD_PORT_TYPE_NORMAL, 0, 0);
 647       if (config->xconnect || config->bridge)
 648         set_int_l2_mode (vm, vnm, MODE_L3, sw_if_index, 0,
 649                          L2_BD_PORT_TYPE_NORMAL, 0, 0);
 650     }
 651   vnet_clear_sw_interface_tag (vnm, sw_if_index);
 652
 653   /* Bring down interface in case it is up. */
 654   if (sw->flags != 0)
 655     vnet_sw_interface_set_flags (vnm, sw_if_index, /* flags */ 0);
 656
 657   call_sw_interface_add_del_callbacks (vnm, sw_if_index, /* is_create */ 0);
 658
 659   pool_put (im->sw_interfaces, sw);
 660 }
 661
 662 static clib_error_t *
 663 call_sw_interface_mtu_change_callbacks (vnet_main_t * vnm, u32 sw_if_index)
 664 {
 665   return call_elf_section_interface_callbacks
 666     (vnm, sw_if_index, 0, vnm->sw_interface_mtu_change_functions);
 667 }
 668
 669 void
 670 vnet_sw_interface_set_mtu (vnet_main_t * vnm, u32 sw_if_index, u32 mtu)
 671 {
 672   vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
 673
 674   if (si->mtu[VNET_MTU_L3] != mtu)
 675     {
 676       si->mtu[VNET_MTU_L3] = mtu;
 677       call_sw_interface_mtu_change_callbacks (vnm, sw_if_index);
 678     }
 679 }
 680
 681 void
 682 vnet_sw_interface_set_protocol_mtu (vnet_main_t * vnm, u32 sw_if_index,
 683                                     u32 mtu[])
 684 {
 685   vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
 686   bool changed = false;
 687   int i;
 688
 689   for (i = 0; i < VNET_N_MTU; i++)
 690     {
 691       if (si->mtu[i] != mtu[i])
 692         {
 693           si->mtu[i] = mtu[i];
 694           changed = true;
 695         }
 696     }
 697   /* Notify interested parties */
 698   if (changed)
 699     call_sw_interface_mtu_change_callbacks (vnm, sw_if_index);
 700 }
 701
 702 void
 703 vnet_sw_interface_ip_directed_broadcast (vnet_main_t * vnm,
 704                                          u32 sw_if_index, u8 enable)
 705 {
 706   vnet_sw_interface_t *si;
 707
 708   si = vnet_get_sw_interface (vnm, sw_if_index);
 709
 710   if (enable)
 711     si->flags |= VNET_SW_INTERFACE_FLAG_DIRECTED_BCAST;
 712   else
 713     si->flags &= ~VNET_SW_INTERFACE_FLAG_DIRECTED_BCAST;
 714
 715   ip4_directed_broadcast (sw_if_index, enable);
 716 }
 717
 718 /*
 719  * Reflect a change in hardware MTU on protocol MTUs
 720  */
 721 static walk_rc_t
 722 sw_interface_walk_callback (vnet_main_t * vnm, u32 sw_if_index, void *ctx)
 723 {
 724   u32 *link_mtu = ctx;
 725   vnet_sw_interface_set_mtu (vnm, sw_if_index, *link_mtu);
 726   return WALK_CONTINUE;
 727 }
 728
 729 void
 730 vnet_hw_interface_set_mtu (vnet_main_t * vnm, u32 hw_if_index, u32 mtu)
 731 {
 732   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
 733
 734   if (hi->max_packet_bytes != mtu)
 735     {
 736       hi->max_packet_bytes = mtu;
 737       ethernet_set_flags (vnm, hw_if_index, ETHERNET_INTERFACE_FLAG_MTU);
 738       vnet_hw_interface_walk_sw (vnm, hw_if_index, sw_interface_walk_callback,
 739                                  &mtu);
 740     }
 741 }
 742
 743 static void
 744 setup_tx_node (vlib_main_t * vm,
 745                u32 node_index, vnet_device_class_t * dev_class)
 746 {
 747   vlib_node_t *n = vlib_get_node (vm, node_index);
 748
 749   n->function = dev_class->tx_function;
 750   n->format_trace = dev_class->format_tx_trace;
 751
 752   vlib_register_errors (vm, node_index,
 753                         dev_class->tx_function_n_errors,
 754                         dev_class->tx_function_error_strings);
 755 }
 756
 757 static void
 758 setup_output_node (vlib_main_t * vm,
 759                    u32 node_index, vnet_hw_interface_class_t * hw_class)
 760 {
 761   vlib_node_t *n = vlib_get_node (vm, node_index);
 762   n->format_buffer = hw_class->format_header;
 763   n->unformat_buffer = hw_class->unformat_header;
 764 }
 765
 766 /* Register an interface instance. */
 767 u32
 768 vnet_register_interface (vnet_main_t * vnm,
 769                          u32 dev_class_index,
 770                          u32 dev_instance,
 771                          u32 hw_class_index, u32 hw_instance)
 772 {
 773   vnet_interface_main_t *im = &vnm->interface_main;
 774   vnet_hw_interface_t *hw;
 775   vnet_device_class_t *dev_class =
 776     vnet_get_device_class (vnm, dev_class_index);
 777   vnet_hw_interface_class_t *hw_class =
 778     vnet_get_hw_interface_class (vnm, hw_class_index);
 779   vlib_main_t *vm = vnm->vlib_main;
 780   vnet_feature_config_main_t *fcm;
 781   vnet_config_main_t *cm;
 782   u32 hw_index, i;
 783   char *tx_node_name = NULL, *output_node_name = NULL;
 784
 785   pool_get (im->hw_interfaces, hw);
 786   clib_memset (hw, 0, sizeof (*hw));
 787   hw->trace_classify_table_index = ~0;
 788
 789   hw_index = hw - im->hw_interfaces;
 790   hw->hw_if_index = hw_index;
 791   hw->default_rx_mode = VNET_HW_INTERFACE_RX_MODE_POLLING;
 792
 793   if (dev_class->format_device_name)
 794     hw->name = format (0, "%U", dev_class->format_device_name, dev_instance);
 795   else if (hw_class->format_interface_name)
 796     hw->name = format (0, "%U", hw_class->format_interface_name,
 797                        dev_instance);
 798   else
 799     hw->name = format (0, "%s%x", hw_class->name, dev_instance);
 800
 801   if (!im->hw_interface_by_name)
 802     im->hw_interface_by_name = hash_create_vec ( /* size */ 0,
 803                                                 sizeof (hw->name[0]),
 804                                                 sizeof (uword));
 805
 806   hash_set_mem (im->hw_interface_by_name, hw->name, hw_index);
 807
 808   /* Make hardware interface point to software interface. */
 809   {
 810     vnet_sw_interface_t sw = {
 811       .type = VNET_SW_INTERFACE_TYPE_HARDWARE,
 812       .flood_class = VNET_FLOOD_CLASS_NORMAL,
 813       .hw_if_index = hw_index
 814     };
 815     hw->sw_if_index = vnet_create_sw_interface_no_callbacks (vnm, &sw);
 816   }
 817
 818   hw->dev_class_index = dev_class_index;
 819   hw->dev_instance = dev_instance;
 820   hw->hw_class_index = hw_class_index;
 821   hw->hw_instance = hw_instance;
 822
 823   hw->max_rate_bits_per_sec = 0;
 824   hw->min_packet_bytes = 0;
 825   vnet_sw_interface_set_mtu (vnm, hw->sw_if_index, 0);
 826
 827   if (dev_class->tx_function == 0)
 828     goto no_output_nodes;       /* No output/tx nodes to create */
 829
 830   tx_node_name = (char *) format (0, "%v-tx", hw->name);
 831   output_node_name = (char *) format (0, "%v-output", hw->name);
 832
 833   /* If we have previously deleted interface nodes, re-use them. */
 834   if (vec_len (im->deleted_hw_interface_nodes) > 0)
 835     {
 836       vnet_hw_interface_nodes_t *hn;
 837       vlib_node_t *node;
 838       vlib_node_runtime_t *nrt;
 839
 840       hn = vec_end (im->deleted_hw_interface_nodes) - 1;
 841
 842       hw->tx_node_index = hn->tx_node_index;
 843       hw->output_node_index = hn->output_node_index;
 844
 845       vlib_node_rename (vm, hw->tx_node_index, "%v", tx_node_name);
 846       vlib_node_rename (vm, hw->output_node_index, "%v", output_node_name);
 847
 848       /* *INDENT-OFF* */
 849       foreach_vlib_main ({
 850         vnet_interface_output_runtime_t *rt;
 851
 852         rt = vlib_node_get_runtime_data (this_vlib_main, hw->output_node_index);
 853         ASSERT (rt->is_deleted == 1);
 854         rt->is_deleted = 0;
 855         rt->hw_if_index = hw_index;
 856         rt->sw_if_index = hw->sw_if_index;
 857         rt->dev_instance = hw->dev_instance;
 858
 859         rt = vlib_node_get_runtime_data (this_vlib_main, hw->tx_node_index);
 860         rt->hw_if_index = hw_index;
 861         rt->sw_if_index = hw->sw_if_index;
 862         rt->dev_instance = hw->dev_instance;
 863       });
 864       /* *INDENT-ON* */
 865
 866       /* The new class may differ from the old one.
 867        * Functions have to be updated. */
 868       node = vlib_get_node (vm, hw->output_node_index);
 869       node->function = vnet_interface_output_node;
 870       node->format_trace = format_vnet_interface_output_trace;
 871       /* *INDENT-OFF* */
 872       foreach_vlib_main ({
 873         nrt = vlib_node_get_runtime (this_vlib_main, hw->output_node_index);
 874         nrt->function = node->function;
 875       });
 876       /* *INDENT-ON* */
 877
 878       node = vlib_get_node (vm, hw->tx_node_index);
 879       node->function = dev_class->tx_function;
 880       node->format_trace = dev_class->format_tx_trace;
 881       /* *INDENT-OFF* */
 882       foreach_vlib_main ({
 883         nrt = vlib_node_get_runtime (this_vlib_main, hw->tx_node_index);
 884         nrt->function = node->function;
 885       });
 886       /* *INDENT-ON* */
 887
 888       _vec_len (im->deleted_hw_interface_nodes) -= 1;
 889     }
 890   else
 891     {
 892       vlib_node_registration_t r;
 893       vnet_interface_output_runtime_t rt = {
 894         .hw_if_index = hw_index,
 895         .sw_if_index = hw->sw_if_index,
 896         .dev_instance = hw->dev_instance,
 897         .is_deleted = 0,
 898       };
 899
 900       clib_memset (&r, 0, sizeof (r));
 901       r.type = VLIB_NODE_TYPE_INTERNAL;
 902       r.runtime_data = &rt;
 903       r.runtime_data_bytes = sizeof (rt);
 904       r.scalar_size = 0;
 905       r.vector_size = sizeof (u32);
 906
 907       r.flags = VLIB_NODE_FLAG_IS_OUTPUT;
 908       r.name = tx_node_name;
 909       r.function = dev_class->tx_function;
 910
 911       hw->tx_node_index = vlib_register_node (vm, &r);
 912
 913       vlib_node_add_named_next_with_slot (vm, hw->tx_node_index,
 914                                           "error-drop",
 915                                           VNET_INTERFACE_TX_NEXT_DROP);
 916
 917       r.flags = 0;
 918       r.name = output_node_name;
 919       r.function = vnet_interface_output_node;
 920       r.format_trace = format_vnet_interface_output_trace;
 921
 922       {
 923         static char *e[] = {
 924           "interface is down",
 925           "interface is deleted",
 926           "no buffers to segment GSO",
 927         };
 928
 929         r.n_errors = ARRAY_LEN (e);
 930         r.error_strings = e;
 931       }
 932       hw->output_node_index = vlib_register_node (vm, &r);
 933
 934       vlib_node_add_named_next_with_slot (vm, hw->output_node_index,
 935                                           "error-drop",
 936                                           VNET_INTERFACE_OUTPUT_NEXT_DROP);
 937       vlib_node_add_next_with_slot (vm, hw->output_node_index,
 938                                     hw->tx_node_index,
 939                                     VNET_INTERFACE_OUTPUT_NEXT_TX);
 940
 941       /* add interface to the list of "output-interface" feature arc start nodes
 942          and clone nexts from 1st interface if it exists */
 943       fcm = vnet_feature_get_config_main (im->output_feature_arc_index);
 944       cm = &fcm->config_main;
 945       i = vec_len (cm->start_node_indices);
 946       vec_validate (cm->start_node_indices, i);
 947       cm->start_node_indices[i] = hw->output_node_index;
 948       if (hw_index)
 949         {
 950           /* copy nexts from 1st interface */
 951           vnet_hw_interface_t *first_hw;
 952           vlib_node_t *first_node;
 953
 954           first_hw = vnet_get_hw_interface (vnm, /* hw_if_index */ 0);
 955           first_node = vlib_get_node (vm, first_hw->output_node_index);
 956
 957           /* 1st 2 nexts are already added above */
 958           for (i = 2; i < vec_len (first_node->next_nodes); i++)
 959             vlib_node_add_next_with_slot (vm, hw->output_node_index,
 960                                           first_node->next_nodes[i], i);
 961         }
 962     }
 963
 964   setup_output_node (vm, hw->output_node_index, hw_class);
 965   setup_tx_node (vm, hw->tx_node_index, dev_class);
 966
 967 no_output_nodes:
 968   /* Call all up/down callbacks with zero flags when interface is created. */
 969   vnet_sw_interface_set_flags_helper (vnm, hw->sw_if_index, /* flags */ 0,
 970                                       VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE);
 971   vnet_hw_interface_set_flags_helper (vnm, hw_index, /* flags */ 0,
 972                                       VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE);
 973   vec_free (tx_node_name);
 974   vec_free (output_node_name);
 975
 976   return hw_index;
 977 }
 978
 979 void
 980 vnet_delete_hw_interface (vnet_main_t * vnm, u32 hw_if_index)
 981 {
 982   vnet_interface_main_t *im = &vnm->interface_main;
 983   vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
 984   vlib_main_t *vm = vnm->vlib_main;
 985   vnet_device_class_t *dev_class = vnet_get_device_class (vnm,
 986                                                           hw->dev_class_index);
 987   /* If it is up, mark it down. */
 988   if (hw->flags != 0)
 989     vnet_hw_interface_set_flags (vnm, hw_if_index, /* flags */ 0);
 990
 991   /* Call delete callbacks. */
 992   call_hw_interface_add_del_callbacks (vnm, hw_if_index, /* is_create */ 0);
 993
 994   /* Delete any sub-interfaces. */
 995   {
 996     u32 id, sw_if_index;
 997     /* *INDENT-OFF* */
 998     hash_foreach (id, sw_if_index, hw->sub_interface_sw_if_index_by_id,
 999     ({
1000       vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
1001       u64 sup_and_sub_key =
1002         ((u64) (si->sup_sw_if_index) << 32) | (u64) si->sub.id;
1003       hash_unset_mem_free (&im->sw_if_index_by_sup_and_sub, &sup_and_sub_key);
1004       vnet_delete_sw_interface (vnm, sw_if_index);
1005     }));
1006     hash_free (hw->sub_interface_sw_if_index_by_id);
1007     /* *INDENT-ON* */
1008   }
1009
1010   /* Delete software interface corresponding to hardware interface. */
1011   vnet_delete_sw_interface (vnm, hw->sw_if_index);
1012
1013   if (dev_class->tx_function)
1014     {
1015       /* Put output/tx nodes into recycle pool */
1016       vnet_hw_interface_nodes_t *dn;
1017
1018       /* *INDENT-OFF* */
1019       foreach_vlib_main
1020         ({
1021           vnet_interface_output_runtime_t *rt =
1022             vlib_node_get_runtime_data (this_vlib_main, hw->output_node_index);
1023
1024           /* Mark node runtime as deleted so output node (if called)
1025            * will drop packets. */
1026           rt->is_deleted = 1;
1027         });
1028       /* *INDENT-ON* */
1029
1030       vlib_node_rename (vm, hw->output_node_index,
1031                         "interface-%d-output-deleted", hw_if_index);
1032       vlib_node_rename (vm, hw->tx_node_index, "interface-%d-tx-deleted",
1033                         hw_if_index);
1034       vec_add2 (im->deleted_hw_interface_nodes, dn, 1);
1035       dn->tx_node_index = hw->tx_node_index;
1036       dn->output_node_index = hw->output_node_index;
1037     }
1038
1039   hash_unset_mem (im->hw_interface_by_name, hw->name);
1040   vec_free (hw->name);
1041   vec_free (hw->hw_address);
1042   vec_free (hw->input_node_thread_index_by_queue);
1043   vec_free (hw->dq_runtime_index_by_queue);
1044
1045   pool_put (im->hw_interfaces, hw);
1046 }
1047
1048 void
1049 vnet_hw_interface_walk_sw (vnet_main_t * vnm,
1050                            u32 hw_if_index,
1051                            vnet_hw_sw_interface_walk_t fn, void *ctx)
1052 {
1053   vnet_hw_interface_t *hi;
1054   u32 id, sw_if_index;
1055
1056   hi = vnet_get_hw_interface (vnm, hw_if_index);
1057   /* the super first, then the sub interfaces */
1058   if (WALK_STOP == fn (vnm, hi->sw_if_index, ctx))
1059     return;
1060
1061   /* *INDENT-OFF* */
1062   hash_foreach (id, sw_if_index,
1063                 hi->sub_interface_sw_if_index_by_id,
1064   ({
1065     if (WALK_STOP == fn (vnm, sw_if_index, ctx))
1066       break;
1067   }));
1068   /* *INDENT-ON* */
1069 }
1070
1071 void
1072 vnet_hw_interface_walk (vnet_main_t * vnm,
1073                         vnet_hw_interface_walk_t fn, void *ctx)
1074 {
1075   vnet_interface_main_t *im;
1076   vnet_hw_interface_t *hi;
1077
1078   im = &vnm->interface_main;
1079
1080   /* *INDENT-OFF* */
1081   pool_foreach (hi, im->hw_interfaces,
1082   ({
1083     if (WALK_STOP == fn(vnm, hi->hw_if_index, ctx))
1084       break;
1085   }));
1086   /* *INDENT-ON* */
1087 }
1088
1089 void
1090 vnet_sw_interface_walk (vnet_main_t * vnm,
1091                         vnet_sw_interface_walk_t fn, void *ctx)
1092 {
1093   vnet_interface_main_t *im;
1094   vnet_sw_interface_t *si;
1095
1096   im = &vnm->interface_main;
1097
1098   /* *INDENT-OFF* */
1099   pool_foreach (si, im->sw_interfaces,
1100   {
1101     if (WALK_STOP == fn (vnm, si, ctx))
1102       break;
1103   });
1104   /* *INDENT-ON* */
1105 }
1106
1107 void
1108 vnet_hw_interface_init_for_class (vnet_main_t * vnm, u32 hw_if_index,
1109                                   u32 hw_class_index, u32 hw_instance)
1110 {
1111   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1112   vnet_hw_interface_class_t *hc =
1113     vnet_get_hw_interface_class (vnm, hw_class_index);
1114
1115   hi->hw_class_index = hw_class_index;
1116   hi->hw_instance = hw_instance;
1117   setup_output_node (vnm->vlib_main, hi->output_node_index, hc);
1118 }
1119
1120 static clib_error_t *
1121 vnet_hw_interface_set_class_helper (vnet_main_t * vnm, u32 hw_if_index,
1122                                     u32 hw_class_index, u32 redistribute)
1123 {
1124   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1125   vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, hi->sw_if_index);
1126   vnet_hw_interface_class_t *old_class =
1127     vnet_get_hw_interface_class (vnm, hi->hw_class_index);
1128   vnet_hw_interface_class_t *new_class =
1129     vnet_get_hw_interface_class (vnm, hw_class_index);
1130   vnet_device_class_t *dev_class =
1131     vnet_get_device_class (vnm, hi->dev_class_index);
1132   clib_error_t *error = 0;
1133
1134   /* New class equals old class?  Nothing to do. */
1135   if (hi->hw_class_index == hw_class_index)
1136     return 0;
1137
1138   /* No need (and incorrect since admin up flag may be set) to do error checking when
1139      receiving unserialize message. */
1140   if (redistribute)
1141     {
1142       if (si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
1143         return clib_error_return (0,
1144                                   "%v must be admin down to change class from %s to %s",
1145                                   hi->name, old_class->name, new_class->name);
1146
1147       /* Make sure interface supports given class. */
1148       if ((new_class->is_valid_class_for_interface
1149            && !new_class->is_valid_class_for_interface (vnm, hw_if_index,
1150                                                         hw_class_index))
1151           || (dev_class->is_valid_class_for_interface
1152               && !dev_class->is_valid_class_for_interface (vnm, hw_if_index,
1153                                                            hw_class_index)))
1154         return clib_error_return (0,
1155                                   "%v class cannot be changed from %s to %s",
1156                                   hi->name, old_class->name, new_class->name);
1157
1158     }
1159
1160   if (old_class->hw_class_change)
1161     old_class->hw_class_change (vnm, hw_if_index, old_class->index,
1162                                 new_class->index);
1163
1164   vnet_hw_interface_init_for_class (vnm, hw_if_index, new_class->index,
1165                                     /* instance */ ~0);
1166
1167   if (new_class->hw_class_change)
1168     new_class->hw_class_change (vnm, hw_if_index, old_class->index,
1169                                 new_class->index);
1170
1171   if (dev_class->hw_class_change)
1172     dev_class->hw_class_change (vnm, hw_if_index, new_class->index);
1173
1174   return error;
1175 }
1176
1177 clib_error_t *
1178 vnet_hw_interface_set_class (vnet_main_t * vnm, u32 hw_if_index,
1179                              u32 hw_class_index)
1180 {
1181   return vnet_hw_interface_set_class_helper (vnm, hw_if_index, hw_class_index,
1182                                              /* redistribute */ 1);
1183 }
1184
1185 static int
1186 vnet_hw_interface_rx_redirect_to_node_helper (vnet_main_t * vnm,
1187                                               u32 hw_if_index,
1188                                               u32 node_index,
1189                                               u32 redistribute)
1190 {
1191   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1192   vnet_device_class_t *dev_class = vnet_get_device_class
1193     (vnm, hi->dev_class_index);
1194
1195   if (dev_class->rx_redirect_to_node)
1196     {
1197       dev_class->rx_redirect_to_node (vnm, hw_if_index, node_index);
1198       return 0;
1199     }
1200
1201   return VNET_API_ERROR_UNIMPLEMENTED;
1202 }
1203
1204 int
1205 vnet_hw_interface_rx_redirect_to_node (vnet_main_t * vnm, u32 hw_if_index,
1206                                        u32 node_index)
1207 {
1208   return vnet_hw_interface_rx_redirect_to_node_helper (vnm, hw_if_index,
1209                                                        node_index,
1210                                                        1 /* redistribute */ );
1211 }
1212
1213 word
1214 vnet_sw_interface_compare (vnet_main_t * vnm,
1215                            uword sw_if_index0, uword sw_if_index1)
1216 {
1217   vnet_sw_interface_t *sup0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1218   vnet_sw_interface_t *sup1 = vnet_get_sup_sw_interface (vnm, sw_if_index1);
1219   vnet_hw_interface_t *h0 = vnet_get_hw_interface (vnm, sup0->hw_if_index);
1220   vnet_hw_interface_t *h1 = vnet_get_hw_interface (vnm, sup1->hw_if_index);
1221
1222   if (h0 != h1)
1223     return vec_cmp (h0->name, h1->name);
1224   return (word) h0->hw_instance - (word) h1->hw_instance;
1225 }
1226
1227 word
1228 vnet_hw_interface_compare (vnet_main_t * vnm,
1229                            uword hw_if_index0, uword hw_if_index1)
1230 {
1231   vnet_hw_interface_t *h0 = vnet_get_hw_interface (vnm, hw_if_index0);
1232   vnet_hw_interface_t *h1 = vnet_get_hw_interface (vnm, hw_if_index1);
1233
1234   if (h0 != h1)
1235     return vec_cmp (h0->name, h1->name);
1236   return (word) h0->hw_instance - (word) h1->hw_instance;
1237 }
1238
1239 int
1240 vnet_sw_interface_is_p2p (vnet_main_t * vnm, u32 sw_if_index)
1241 {
1242   vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
1243   if ((si->type == VNET_SW_INTERFACE_TYPE_P2P) ||
1244       (si->type == VNET_SW_INTERFACE_TYPE_PIPE))
1245     return 1;
1246
1247   vnet_hw_interface_t *hw = vnet_get_sup_hw_interface (vnm, sw_if_index);
1248   vnet_hw_interface_class_t *hc =
1249     vnet_get_hw_interface_class (vnm, hw->hw_class_index);
1250
1251   return (hc->flags & VNET_HW_INTERFACE_CLASS_FLAG_P2P);
1252 }
1253
1254 int
1255 vnet_sw_interface_is_nbma (vnet_main_t * vnm, u32 sw_if_index)
1256 {
1257   vnet_hw_interface_t *hw = vnet_get_sup_hw_interface (vnm, sw_if_index);
1258   vnet_hw_interface_class_t *hc =
1259     vnet_get_hw_interface_class (vnm, hw->hw_class_index);
1260
1261   return (hc->flags & VNET_HW_INTERFACE_CLASS_FLAG_NBMA);
1262 }
1263
1264 clib_error_t *
1265 vnet_interface_init (vlib_main_t * vm)
1266 {
1267   vnet_main_t *vnm = vnet_get_main ();
1268   vnet_interface_main_t *im = &vnm->interface_main;
1269   vlib_buffer_t *b = 0;
1270   vnet_buffer_opaque_t *o = 0;
1271   clib_error_t *error;
1272
1273   /*
1274    * Keep people from shooting themselves in the foot.
1275    */
1276   if (sizeof (b->opaque) != sizeof (vnet_buffer_opaque_t))
1277     {
1278 #define _(a) if (sizeof(o->a) > sizeof (o->unused))                     \
1279       clib_warning                                                      \
1280         ("FATAL: size of opaque union subtype %s is %d (max %d)",       \
1281          #a, sizeof(o->a), sizeof (o->unused));
1282       foreach_buffer_opaque_union_subtype;
1283 #undef _
1284
1285       return clib_error_return
1286         (0, "FATAL: size of vlib buffer opaque %d, size of vnet opaque %d",
1287          sizeof (b->opaque), sizeof (vnet_buffer_opaque_t));
1288     }
1289
1290   clib_spinlock_init (&im->sw_if_counter_lock);
1291   clib_spinlock_lock (&im->sw_if_counter_lock); /* should be no need */
1292
1293   vec_validate (im->sw_if_counters, VNET_N_SIMPLE_INTERFACE_COUNTER - 1);
1294 #define _(E,n,p)                                                        \
1295   im->sw_if_counters[VNET_INTERFACE_COUNTER_##E].name = #n;             \
1296   im->sw_if_counters[VNET_INTERFACE_COUNTER_##E].stat_segment_name = "/" #p "/" #n;
1297   foreach_simple_interface_counter_name
1298 #undef _
1299     vec_validate (im->combined_sw_if_counters,
1300                   VNET_N_COMBINED_INTERFACE_COUNTER - 1);
1301 #define _(E,n,p)                                                        \
1302   im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_##E].name = #n;    \
1303   im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_##E].stat_segment_name = "/" #p "/" #n;
1304   foreach_combined_interface_counter_name
1305 #undef _
1306     clib_spinlock_unlock (&im->sw_if_counter_lock);
1307
1308   im->device_class_by_name = hash_create_string ( /* size */ 0,
1309                                                  sizeof (uword));
1310   {
1311     vnet_device_class_t *c;
1312
1313     c = vnm->device_class_registrations;
1314
1315     while (c)
1316       {
1317         c->index = vec_len (im->device_classes);
1318         hash_set_mem (im->device_class_by_name, c->name, c->index);
1319
1320         if (c->tx_fn_registrations)
1321           {
1322             vlib_node_fn_registration_t *fnr = c->tx_fn_registrations;
1323             int priority = -1;
1324
1325             /* to avoid confusion, please remove ".tx_function" statement
1326                from VNET_DEVICE_CLASS() if using function candidates */
1327             ASSERT (c->tx_function == 0);
1328
1329             while (fnr)
1330               {
1331                 if (fnr->priority > priority)
1332                   {
1333                     priority = fnr->priority;
1334                     c->tx_function = fnr->function;
1335                   }
1336                 fnr = fnr->next_registration;
1337               }
1338           }
1339
1340         vec_add1 (im->device_classes, c[0]);
1341         c = c->next_class_registration;
1342       }
1343   }
1344
1345   im->hw_interface_class_by_name = hash_create_string ( /* size */ 0,
1346                                                        sizeof (uword));
1347
1348   im->sw_if_index_by_sup_and_sub = hash_create_mem (0, sizeof (u64),
1349                                                     sizeof (uword));
1350   {
1351     vnet_hw_interface_class_t *c;
1352
1353     c = vnm->hw_interface_class_registrations;
1354
1355     while (c)
1356       {
1357         c->index = vec_len (im->hw_interface_classes);
1358         hash_set_mem (im->hw_interface_class_by_name, c->name, c->index);
1359
1360         if (NULL == c->build_rewrite)
1361           c->build_rewrite = default_build_rewrite;
1362         if (NULL == c->update_adjacency)
1363           c->update_adjacency = default_update_adjacency;
1364
1365         vec_add1 (im->hw_interface_classes, c[0]);
1366         c = c->next_class_registration;
1367       }
1368   }
1369
1370   /* init per-thread data */
1371   vec_validate_aligned (im->per_thread_data, vlib_num_workers (),
1372                         CLIB_CACHE_LINE_BYTES);
1373
1374   if ((error = vlib_call_init_function (vm, vnet_interface_cli_init)))
1375     return error;
1376
1377   vnm->interface_tag_by_sw_if_index = hash_create (0, sizeof (uword));
1378
1379 #if VLIB_BUFFER_TRACE_TRAJECTORY > 0
1380   if ((error = vlib_call_init_function (vm, trajectory_trace_init)))
1381     return error;
1382 #endif
1383
1384   return 0;
1385 }
1386
1387 VLIB_INIT_FUNCTION (vnet_interface_init);
1388
1389 /* Kludge to renumber interface names [only!] */
1390 int
1391 vnet_interface_name_renumber (u32 sw_if_index, u32 new_show_dev_instance)
1392 {
1393   int rv;
1394   vnet_main_t *vnm = vnet_get_main ();
1395   vnet_interface_main_t *im = &vnm->interface_main;
1396   vnet_hw_interface_t *hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
1397
1398   vnet_device_class_t *dev_class = vnet_get_device_class
1399     (vnm, hi->dev_class_index);
1400
1401   if (dev_class->name_renumber == 0 || dev_class->format_device_name == 0)
1402     return VNET_API_ERROR_UNIMPLEMENTED;
1403
1404   rv = dev_class->name_renumber (hi, new_show_dev_instance);
1405
1406   if (rv)
1407     return rv;
1408
1409   hash_unset_mem (im->hw_interface_by_name, hi->name);
1410   vec_free (hi->name);
1411   /* Use the mapping we set up to call it Ishmael */
1412   hi->name = format (0, "%U", dev_class->format_device_name,
1413                      hi->dev_instance);
1414
1415   hash_set_mem (im->hw_interface_by_name, hi->name, hi->hw_if_index);
1416   return rv;
1417 }
1418
1419 clib_error_t *
1420 vnet_rename_interface (vnet_main_t * vnm, u32 hw_if_index, char *new_name)
1421 {
1422   vnet_interface_main_t *im = &vnm->interface_main;
1423   vlib_main_t *vm = vnm->vlib_main;
1424   vnet_hw_interface_t *hw;
1425   u8 *old_name;
1426   clib_error_t *error = 0;
1427
1428   hw = vnet_get_hw_interface (vnm, hw_if_index);
1429   if (!hw)
1430     {
1431       return clib_error_return (0,
1432                                 "unable to find hw interface for index %u",
1433                                 hw_if_index);
1434     }
1435
1436   old_name = hw->name;
1437
1438   /* set new hw->name */
1439   hw->name = format (0, "%s", new_name);
1440
1441   /* remove the old name to hw_if_index mapping and install the new one */
1442   hash_unset_mem (im->hw_interface_by_name, old_name);
1443   hash_set_mem (im->hw_interface_by_name, hw->name, hw_if_index);
1444
1445   /* rename tx/output nodes */
1446   vlib_node_rename (vm, hw->tx_node_index, "%v-tx", hw->name);
1447   vlib_node_rename (vm, hw->output_node_index, "%v-output", hw->name);
1448
1449   /* free the old name vector */
1450   vec_free (old_name);
1451
1452   return error;
1453 }
1454
1455 clib_error_t *
1456 vnet_hw_interface_add_del_mac_address (vnet_main_t * vnm,
1457                                        u32 hw_if_index,
1458                                        const u8 * mac_address, u8 is_add)
1459 {
1460   clib_error_t *error = 0;
1461   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1462
1463   vnet_device_class_t *dev_class =
1464     vnet_get_device_class (vnm, hi->dev_class_index);
1465
1466   if (!hi->hw_address)
1467     {
1468       error =
1469         clib_error_return
1470         (0, "Secondary MAC Addresses not supported for interface index %u",
1471          hw_if_index);
1472       goto done;
1473     }
1474
1475   if (dev_class->mac_addr_add_del_function)
1476     error = dev_class->mac_addr_add_del_function (hi, mac_address, is_add);
1477
1478   if (!error)
1479     {
1480       vnet_hw_interface_class_t *hw_class;
1481
1482       hw_class = vnet_get_hw_interface_class (vnm, hi->hw_class_index);
1483
1484       if (NULL != hw_class->mac_addr_add_del_function)
1485         error = hw_class->mac_addr_add_del_function (hi, mac_address, is_add);
1486     }
1487
1488   /* If no errors, add to the list of secondary MACs on the ethernet intf */
1489   if (!error)
1490     ethernet_interface_add_del_address (&ethernet_main, hw_if_index,
1491                                         mac_address, is_add);
1492
1493 done:
1494   return error;
1495 }
1496
1497 static clib_error_t *
1498 vnet_hw_interface_change_mac_address_helper (vnet_main_t * vnm,
1499                                              u32 hw_if_index,
1500                                              const u8 * mac_address)
1501 {
1502   clib_error_t *error = 0;
1503   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1504
1505   if (hi->hw_address)
1506     {
1507       u8 *old_address = vec_dup (hi->hw_address);
1508       vnet_device_class_t *dev_class =
1509         vnet_get_device_class (vnm, hi->dev_class_index);
1510       if (dev_class->mac_addr_change_function)
1511         {
1512           error =
1513             dev_class->mac_addr_change_function (hi, old_address,
1514                                                  mac_address);
1515         }
1516       if (!error)
1517         {
1518           vnet_hw_interface_class_t *hw_class;
1519
1520           hw_class = vnet_get_hw_interface_class (vnm, hi->hw_class_index);
1521
1522           if (NULL != hw_class->mac_addr_change_function)
1523             hw_class->mac_addr_change_function (hi, old_address, mac_address);
1524         }
1525       else
1526         {
1527           error =
1528             clib_error_return (0,
1529                                "MAC Address Change is not supported on this interface");
1530         }
1531       vec_free (old_address);
1532     }
1533   else
1534     {
1535       error =
1536         clib_error_return (0,
1537                            "mac address change is not supported for interface index %u",
1538                            hw_if_index);
1539     }
1540   return error;
1541 }
1542
1543 clib_error_t *
1544 vnet_hw_interface_change_mac_address (vnet_main_t * vnm, u32 hw_if_index,
1545                                       const u8 * mac_address)
1546 {
1547   return vnet_hw_interface_change_mac_address_helper
1548     (vnm, hw_if_index, mac_address);
1549 }
1550
1551 /* update the unnumbered state of an interface*/
1552 void
1553 vnet_sw_interface_update_unnumbered (u32 unnumbered_sw_if_index,
1554                                      u32 ip_sw_if_index, u8 enable)
1555 {
1556   vnet_main_t *vnm = vnet_get_main ();
1557   vnet_sw_interface_t *si;
1558   u32 was_unnum;
1559
1560   si = vnet_get_sw_interface (vnm, unnumbered_sw_if_index);
1561   was_unnum = (si->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED);
1562
1563   if (enable)
1564     {
1565       si->flags |= VNET_SW_INTERFACE_FLAG_UNNUMBERED;
1566       si->unnumbered_sw_if_index = ip_sw_if_index;
1567
1568       ip4_main.lookup_main.if_address_pool_index_by_sw_if_index
1569         [unnumbered_sw_if_index] =
1570         ip4_main.
1571         lookup_main.if_address_pool_index_by_sw_if_index[ip_sw_if_index];
1572       ip6_main.
1573         lookup_main.if_address_pool_index_by_sw_if_index
1574         [unnumbered_sw_if_index] =
1575         ip6_main.
1576         lookup_main.if_address_pool_index_by_sw_if_index[ip_sw_if_index];
1577     }
1578   else
1579     {
1580       si->flags &= ~(VNET_SW_INTERFACE_FLAG_UNNUMBERED);
1581       si->unnumbered_sw_if_index = (u32) ~ 0;
1582
1583       ip4_main.lookup_main.if_address_pool_index_by_sw_if_index
1584         [unnumbered_sw_if_index] = ~0;
1585       ip6_main.lookup_main.if_address_pool_index_by_sw_if_index
1586         [unnumbered_sw_if_index] = ~0;
1587     }
1588
1589   if (was_unnum != (si->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED))
1590     {
1591       ip4_sw_interface_enable_disable (unnumbered_sw_if_index, enable);
1592       ip6_sw_interface_enable_disable (unnumbered_sw_if_index, enable);
1593     }
1594 }
1595
1596 vnet_l3_packet_type_t
1597 vnet_link_to_l3_proto (vnet_link_t link)
1598 {
1599   switch (link)
1600     {
1601     case VNET_LINK_IP4:
1602       return (VNET_L3_PACKET_TYPE_IP4);
1603     case VNET_LINK_IP6:
1604       return (VNET_L3_PACKET_TYPE_IP6);
1605     case VNET_LINK_MPLS:
1606       return (VNET_L3_PACKET_TYPE_MPLS);
1607     case VNET_LINK_ARP:
1608       return (VNET_L3_PACKET_TYPE_ARP);
1609     case VNET_LINK_ETHERNET:
1610     case VNET_LINK_NSH:
1611       ASSERT (0);
1612       break;
1613     }
1614   ASSERT (0);
1615   return (0);
1616 }
1617
1618 vnet_mtu_t
1619 vnet_link_to_mtu (vnet_link_t link)
1620 {
1621   switch (link)
1622     {
1623     case VNET_LINK_IP4:
1624       return (VNET_MTU_IP4);
1625     case VNET_LINK_IP6:
1626       return (VNET_MTU_IP6);
1627     case VNET_LINK_MPLS:
1628       return (VNET_MTU_MPLS);
1629     default:
1630       return (VNET_MTU_L3);
1631     }
1632 }
1633
1634 u8 *
1635 default_build_rewrite (vnet_main_t * vnm,
1636                        u32 sw_if_index,
1637                        vnet_link_t link_type, const void *dst_address)
1638 {
1639   return (NULL);
1640 }
1641
1642 void
1643 default_update_adjacency (vnet_main_t * vnm, u32 sw_if_index, u32 ai)
1644 {
1645   ip_adjacency_t *adj;
1646
1647   adj = adj_get (ai);
1648
1649   switch (adj->lookup_next_index)
1650     {
1651     case IP_LOOKUP_NEXT_GLEAN:
1652       adj_glean_update_rewrite (ai);
1653       break;
1654     case IP_LOOKUP_NEXT_ARP:
1655     case IP_LOOKUP_NEXT_BCAST:
1656       /*
1657        * default rewrite in neighbour adj
1658        */
1659       adj_nbr_update_rewrite
1660         (ai,
1661          ADJ_NBR_REWRITE_FLAG_COMPLETE,
1662          vnet_build_rewrite_for_sw_interface (vnm,
1663                                               sw_if_index,
1664                                               adj_get_link_type (ai), NULL));
1665       break;
1666     case IP_LOOKUP_NEXT_MCAST:
1667       /*
1668        * mcast traffic also uses default rewrite string with no mcast
1669        * switch time updates.
1670        */
1671       adj_mcast_update_rewrite
1672         (ai,
1673          vnet_build_rewrite_for_sw_interface (vnm,
1674                                               sw_if_index,
1675                                               adj_get_link_type (ai),
1676                                               NULL), 0);
1677       break;
1678     case IP_LOOKUP_NEXT_DROP:
1679     case IP_LOOKUP_NEXT_PUNT:
1680     case IP_LOOKUP_NEXT_LOCAL:
1681     case IP_LOOKUP_NEXT_REWRITE:
1682     case IP_LOOKUP_NEXT_MCAST_MIDCHAIN:
1683     case IP_LOOKUP_NEXT_MIDCHAIN:
1684     case IP_LOOKUP_NEXT_ICMP_ERROR:
1685     case IP_LOOKUP_N_NEXT:
1686       ASSERT (0);
1687       break;
1688     }
1689 }
1690
1691 int collect_detailed_interface_stats_flag = 0;
1692
1693 void
1694 collect_detailed_interface_stats_flag_set (void)
1695 {
1696   collect_detailed_interface_stats_flag = 1;
1697 }
1698
1699 void
1700 collect_detailed_interface_stats_flag_clear (void)
1701 {
1702   collect_detailed_interface_stats_flag = 0;
1703 }
1704
1705 static clib_error_t *
1706 collect_detailed_interface_stats_cli (vlib_main_t * vm,
1707                                       unformat_input_t * input,
1708                                       vlib_cli_command_t * cmd)
1709 {
1710   unformat_input_t _line_input, *line_input = &_line_input;
1711   clib_error_t *error = NULL;
1712
1713   /* Get a line of input. */
1714   if (!unformat_user (input, unformat_line_input, line_input))
1715     return clib_error_return (0, "expected enable | disable");
1716
1717   while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
1718     {
1719       if (unformat (line_input, "enable") || unformat (line_input, "on"))
1720         collect_detailed_interface_stats_flag_set ();
1721       else if (unformat (line_input, "disable")
1722                || unformat (line_input, "off"))
1723         collect_detailed_interface_stats_flag_clear ();
1724       else
1725         {
1726           error = clib_error_return (0, "unknown input `%U'",
1727                                      format_unformat_error, line_input);
1728           goto done;
1729         }
1730     }
1731
1732 done:
1733   unformat_free (line_input);
1734   return error;
1735 }
1736
1737 /* *INDENT-OFF* */
1738 VLIB_CLI_COMMAND (collect_detailed_interface_stats_command, static) = {
1739   .path = "interface collect detailed-stats",
1740   .short_help = "interface collect detailed-stats <enable|disable>",
1741   .function = collect_detailed_interface_stats_cli,
1742 };
1743 /* *INDENT-ON* */
1744
1745 /*
1746  * fd.io coding-style-patch-verification: ON
1747  *
1748  * Local Variables:
1749  * eval: (c-set-style "gnu")
1750  * End:
1751  */