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