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