src/vnet/interface.c

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