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 static u32
 519 vnet_create_sw_interface_no_callbacks (vnet_main_t * vnm,
 520                                        vnet_sw_interface_t * template)
 521 {
 522   vnet_interface_main_t *im = &vnm->interface_main;
 523   vnet_sw_interface_t *sw;
 524   u32 sw_if_index;
 525
 526   pool_get (im->sw_interfaces, sw);
 527   sw_if_index = sw - im->sw_interfaces;
 528
 529   sw[0] = template[0];
 530
 531   sw->flags = 0;
 532   sw->sw_if_index = sw_if_index;
 533   if (sw->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
 534     sw->sup_sw_if_index = sw->sw_if_index;
 535
 536   /* Allocate counters for this interface. */
 537   {
 538     u32 i;
 539
 540     vnet_interface_counter_lock (im);
 541
 542     for (i = 0; i < vec_len (im->sw_if_counters); i++)
 543       {
 544         vlib_validate_simple_counter (&im->sw_if_counters[i], sw_if_index);
 545         vlib_zero_simple_counter (&im->sw_if_counters[i], sw_if_index);
 546       }
 547
 548     for (i = 0; i < vec_len (im->combined_sw_if_counters); i++)
 549       {
 550         vlib_validate_combined_counter (&im->combined_sw_if_counters[i],
 551                                         sw_if_index);
 552         vlib_zero_combined_counter (&im->combined_sw_if_counters[i],
 553                                     sw_if_index);
 554       }
 555
 556     vnet_interface_counter_unlock (im);
 557   }
 558
 559   return sw_if_index;
 560 }
 561
 562 clib_error_t *
 563 vnet_create_sw_interface (vnet_main_t * vnm, vnet_sw_interface_t * template,
 564                           u32 * sw_if_index)
 565 {
 566   clib_error_t *error;
 567   vnet_hw_interface_t *hi;
 568   vnet_device_class_t *dev_class;
 569
 570   hi = vnet_get_sup_hw_interface (vnm, template->sup_sw_if_index);
 571   dev_class = vnet_get_device_class (vnm, hi->dev_class_index);
 572
 573   if (template->type == VNET_SW_INTERFACE_TYPE_SUB &&
 574       dev_class->subif_add_del_function)
 575     {
 576       error = dev_class->subif_add_del_function (vnm, hi->hw_if_index,
 577                                                  (struct vnet_sw_interface_t
 578                                                   *) template, 1);
 579       if (error)
 580         return error;
 581     }
 582
 583   *sw_if_index = vnet_create_sw_interface_no_callbacks (vnm, template);
 584   error = vnet_sw_interface_set_flags_helper
 585     (vnm, *sw_if_index, template->flags,
 586      VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE);
 587
 588   if (error)
 589     {
 590       /* undo the work done by vnet_create_sw_interface_no_callbacks() */
 591       vnet_interface_main_t *im = &vnm->interface_main;
 592       vnet_sw_interface_t *sw =
 593         pool_elt_at_index (im->sw_interfaces, *sw_if_index);
 594       pool_put (im->sw_interfaces, sw);
 595     }
 596
 597   return error;
 598 }
 599
 600 void
 601 vnet_delete_sw_interface (vnet_main_t * vnm, u32 sw_if_index)
 602 {
 603   vnet_interface_main_t *im = &vnm->interface_main;
 604   vnet_sw_interface_t *sw =
 605     pool_elt_at_index (im->sw_interfaces, sw_if_index);
 606
 607   /* Check if the interface has config and is removed from L2 BD or XConnect */
 608   vlib_main_t *vm = vlib_get_main ();
 609   l2_input_config_t *config;
 610   if (sw_if_index < vec_len (l2input_main.configs))
 611     {
 612       config = vec_elt_at_index (l2input_main.configs, sw_if_index);
 613       if (config->xconnect)
 614         set_int_l2_mode (vm, vnm, MODE_L3, config->output_sw_if_index, 0,
 615                          L2_BD_PORT_TYPE_NORMAL, 0, 0);
 616       if (config->xconnect || config->bridge)
 617         set_int_l2_mode (vm, vnm, MODE_L3, sw_if_index, 0,
 618                          L2_BD_PORT_TYPE_NORMAL, 0, 0);
 619     }
 620   vnet_clear_sw_interface_tag (vnm, sw_if_index);
 621
 622   /* Bring down interface in case it is up. */
 623   if (sw->flags != 0)
 624     vnet_sw_interface_set_flags (vnm, sw_if_index, /* flags */ 0);
 625
 626   call_sw_interface_add_del_callbacks (vnm, sw_if_index, /* is_create */ 0);
 627
 628   pool_put (im->sw_interfaces, sw);
 629 }
 630
 631 static clib_error_t *
 632 call_sw_interface_mtu_change_callbacks (vnet_main_t * vnm, u32 sw_if_index)
 633 {
 634   return call_elf_section_interface_callbacks
 635     (vnm, sw_if_index, 0, vnm->sw_interface_mtu_change_functions);
 636 }
 637
 638 void
 639 vnet_sw_interface_set_mtu (vnet_main_t * vnm, u32 sw_if_index, u32 mtu)
 640 {
 641   vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
 642
 643   if (si->mtu[VNET_MTU_L3] != mtu)
 644     {
 645       si->mtu[VNET_MTU_L3] = mtu;
 646       call_sw_interface_mtu_change_callbacks (vnm, sw_if_index);
 647     }
 648 }
 649
 650 void
 651 vnet_sw_interface_set_protocol_mtu (vnet_main_t * vnm, u32 sw_if_index,
 652                                     u32 mtu[])
 653 {
 654   vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
 655   bool changed = false;
 656   int i;
 657
 658   for (i = 0; i < VNET_N_MTU; i++)
 659     {
 660       if (si->mtu[i] != mtu[i])
 661         {
 662           si->mtu[i] = mtu[i];
 663           changed = true;
 664         }
 665     }
 666   /* Notify interested parties */
 667   if (changed)
 668     call_sw_interface_mtu_change_callbacks (vnm, sw_if_index);
 669 }
 670
 671 void
 672 vnet_sw_interface_ip_directed_broadcast (vnet_main_t * vnm,
 673                                          u32 sw_if_index, u8 enable)
 674 {
 675   vnet_sw_interface_t *si;
 676
 677   si = vnet_get_sw_interface (vnm, sw_if_index);
 678
 679   if (enable)
 680     si->flags |= VNET_SW_INTERFACE_FLAG_DIRECTED_BCAST;
 681   else
 682     si->flags &= ~VNET_SW_INTERFACE_FLAG_DIRECTED_BCAST;
 683
 684   ip4_directed_broadcast (sw_if_index, enable);
 685 }
 686
 687 /*
 688  * Reflect a change in hardware MTU on protocol MTUs
 689  */
 690 static walk_rc_t
 691 sw_interface_walk_callback (vnet_main_t * vnm, u32 sw_if_index, void *ctx)
 692 {
 693   u32 *link_mtu = ctx;
 694   vnet_sw_interface_set_mtu (vnm, sw_if_index, *link_mtu);
 695   return WALK_CONTINUE;
 696 }
 697
 698 void
 699 vnet_hw_interface_set_mtu (vnet_main_t * vnm, u32 hw_if_index, u32 mtu)
 700 {
 701   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
 702
 703   if (hi->max_packet_bytes != mtu)
 704     {
 705       hi->max_packet_bytes = mtu;
 706       ethernet_set_flags (vnm, hw_if_index, ETHERNET_INTERFACE_FLAG_MTU);
 707       vnet_hw_interface_walk_sw (vnm, hw_if_index, sw_interface_walk_callback,
 708                                  &mtu);
 709     }
 710 }
 711
 712 static void
 713 setup_tx_node (vlib_main_t * vm,
 714                u32 node_index, vnet_device_class_t * dev_class)
 715 {
 716   vlib_node_t *n = vlib_get_node (vm, node_index);
 717
 718   n->function = dev_class->tx_function;
 719   n->format_trace = dev_class->format_tx_trace;
 720
 721   vlib_register_errors (vm, node_index,
 722                         dev_class->tx_function_n_errors,
 723                         dev_class->tx_function_error_strings);
 724 }
 725
 726 static void
 727 setup_output_node (vlib_main_t * vm,
 728                    u32 node_index, vnet_hw_interface_class_t * hw_class)
 729 {
 730   vlib_node_t *n = vlib_get_node (vm, node_index);
 731   n->format_buffer = hw_class->format_header;
 732   n->unformat_buffer = hw_class->unformat_header;
 733 }
 734
 735 /* Register an interface instance. */
 736 u32
 737 vnet_register_interface (vnet_main_t * vnm,
 738                          u32 dev_class_index,
 739                          u32 dev_instance,
 740                          u32 hw_class_index, u32 hw_instance)
 741 {
 742   vnet_interface_main_t *im = &vnm->interface_main;
 743   vnet_hw_interface_t *hw;
 744   vnet_device_class_t *dev_class =
 745     vnet_get_device_class (vnm, dev_class_index);
 746   vnet_hw_interface_class_t *hw_class =
 747     vnet_get_hw_interface_class (vnm, hw_class_index);
 748   vlib_main_t *vm = vnm->vlib_main;
 749   vnet_feature_config_main_t *fcm;
 750   vnet_config_main_t *cm;
 751   u32 hw_index, i;
 752   char *tx_node_name = NULL, *output_node_name = NULL;
 753
 754   pool_get (im->hw_interfaces, hw);
 755   clib_memset (hw, 0, sizeof (*hw));
 756
 757   hw_index = hw - im->hw_interfaces;
 758   hw->hw_if_index = hw_index;
 759   hw->default_rx_mode = VNET_HW_INTERFACE_RX_MODE_POLLING;
 760
 761   if (dev_class->format_device_name)
 762     hw->name = format (0, "%U", dev_class->format_device_name, dev_instance);
 763   else if (hw_class->format_interface_name)
 764     hw->name = format (0, "%U", hw_class->format_interface_name,
 765                        dev_instance);
 766   else
 767     hw->name = format (0, "%s%x", hw_class->name, dev_instance);
 768
 769   if (!im->hw_interface_by_name)
 770     im->hw_interface_by_name = hash_create_vec ( /* size */ 0,
 771                                                 sizeof (hw->name[0]),
 772                                                 sizeof (uword));
 773
 774   hash_set_mem (im->hw_interface_by_name, hw->name, hw_index);
 775
 776   /* Make hardware interface point to software interface. */
 777   {
 778     vnet_sw_interface_t sw = {
 779       .type = VNET_SW_INTERFACE_TYPE_HARDWARE,
 780       .flood_class = VNET_FLOOD_CLASS_NORMAL,
 781       .hw_if_index = hw_index
 782     };
 783     hw->sw_if_index = vnet_create_sw_interface_no_callbacks (vnm, &sw);
 784   }
 785
 786   hw->dev_class_index = dev_class_index;
 787   hw->dev_instance = dev_instance;
 788   hw->hw_class_index = hw_class_index;
 789   hw->hw_instance = hw_instance;
 790
 791   hw->max_rate_bits_per_sec = 0;
 792   hw->min_packet_bytes = 0;
 793   vnet_sw_interface_set_mtu (vnm, hw->sw_if_index, 0);
 794
 795   if (dev_class->tx_function == 0)
 796     goto no_output_nodes;       /* No output/tx nodes to create */
 797
 798   tx_node_name = (char *) format (0, "%v-tx", hw->name);
 799   output_node_name = (char *) format (0, "%v-output", hw->name);
 800
 801   /* If we have previously deleted interface nodes, re-use them. */
 802   if (vec_len (im->deleted_hw_interface_nodes) > 0)
 803     {
 804       vnet_hw_interface_nodes_t *hn;
 805       vlib_node_t *node;
 806       vlib_node_runtime_t *nrt;
 807
 808       hn = vec_end (im->deleted_hw_interface_nodes) - 1;
 809
 810       hw->tx_node_index = hn->tx_node_index;
 811       hw->output_node_index = hn->output_node_index;
 812
 813       vlib_node_rename (vm, hw->tx_node_index, "%v", tx_node_name);
 814       vlib_node_rename (vm, hw->output_node_index, "%v", output_node_name);
 815
 816       /* *INDENT-OFF* */
 817       foreach_vlib_main ({
 818         vnet_interface_output_runtime_t *rt;
 819
 820         rt = vlib_node_get_runtime_data (this_vlib_main, hw->output_node_index);
 821         ASSERT (rt->is_deleted == 1);
 822         rt->is_deleted = 0;
 823         rt->hw_if_index = hw_index;
 824         rt->sw_if_index = hw->sw_if_index;
 825         rt->dev_instance = hw->dev_instance;
 826
 827         rt = vlib_node_get_runtime_data (this_vlib_main, hw->tx_node_index);
 828         rt->hw_if_index = hw_index;
 829         rt->sw_if_index = hw->sw_if_index;
 830         rt->dev_instance = hw->dev_instance;
 831       });
 832       /* *INDENT-ON* */
 833
 834       /* The new class may differ from the old one.
 835        * Functions have to be updated. */
 836       node = vlib_get_node (vm, hw->output_node_index);
 837       node->function = vnet_interface_output_node;
 838       node->format_trace = format_vnet_interface_output_trace;
 839       /* *INDENT-OFF* */
 840       foreach_vlib_main ({
 841         nrt = vlib_node_get_runtime (this_vlib_main, hw->output_node_index);
 842         nrt->function = node->function;
 843       });
 844       /* *INDENT-ON* */
 845
 846       node = vlib_get_node (vm, hw->tx_node_index);
 847       node->function = dev_class->tx_function;
 848       node->format_trace = dev_class->format_tx_trace;
 849       /* *INDENT-OFF* */
 850       foreach_vlib_main ({
 851         nrt = vlib_node_get_runtime (this_vlib_main, hw->tx_node_index);
 852         nrt->function = node->function;
 853       });
 854       /* *INDENT-ON* */
 855
 856       _vec_len (im->deleted_hw_interface_nodes) -= 1;
 857     }
 858   else
 859     {
 860       vlib_node_registration_t r;
 861       vnet_interface_output_runtime_t rt = {
 862         .hw_if_index = hw_index,
 863         .sw_if_index = hw->sw_if_index,
 864         .dev_instance = hw->dev_instance,
 865         .is_deleted = 0,
 866       };
 867
 868       clib_memset (&r, 0, sizeof (r));
 869       r.type = VLIB_NODE_TYPE_INTERNAL;
 870       r.runtime_data = &rt;
 871       r.runtime_data_bytes = sizeof (rt);
 872       r.scalar_size = 0;
 873       r.vector_size = sizeof (u32);
 874
 875       r.flags = VLIB_NODE_FLAG_IS_OUTPUT;
 876       r.name = tx_node_name;
 877       r.function = dev_class->tx_function;
 878
 879       hw->tx_node_index = vlib_register_node (vm, &r);
 880
 881       vlib_node_add_named_next_with_slot (vm, hw->tx_node_index,
 882                                           "error-drop",
 883                                           VNET_INTERFACE_TX_NEXT_DROP);
 884
 885       r.flags = 0;
 886       r.name = output_node_name;
 887       r.function = vnet_interface_output_node;
 888       r.format_trace = format_vnet_interface_output_trace;
 889
 890       {
 891         static char *e[] = {
 892           "interface is down",
 893           "interface is deleted",
 894           "no buffers to segment GSO",
 895         };
 896
 897         r.n_errors = ARRAY_LEN (e);
 898         r.error_strings = e;
 899       }
 900       hw->output_node_index = vlib_register_node (vm, &r);
 901
 902       vlib_node_add_named_next_with_slot (vm, hw->output_node_index,
 903                                           "error-drop",
 904                                           VNET_INTERFACE_OUTPUT_NEXT_DROP);
 905       vlib_node_add_next_with_slot (vm, hw->output_node_index,
 906                                     hw->tx_node_index,
 907                                     VNET_INTERFACE_OUTPUT_NEXT_TX);
 908
 909       /* add interface to the list of "output-interface" feature arc start nodes
 910          and clone nexts from 1st interface if it exists */
 911       fcm = vnet_feature_get_config_main (im->output_feature_arc_index);
 912       cm = &fcm->config_main;
 913       i = vec_len (cm->start_node_indices);
 914       vec_validate (cm->start_node_indices, i);
 915       cm->start_node_indices[i] = hw->output_node_index;
 916       if (hw_index)
 917         {
 918           /* copy nexts from 1st interface */
 919           vnet_hw_interface_t *first_hw;
 920           vlib_node_t *first_node;
 921
 922           first_hw = vnet_get_hw_interface (vnm, /* hw_if_index */ 0);
 923           first_node = vlib_get_node (vm, first_hw->output_node_index);
 924
 925           /* 1st 2 nexts are already added above */
 926           for (i = 2; i < vec_len (first_node->next_nodes); i++)
 927             vlib_node_add_next_with_slot (vm, hw->output_node_index,
 928                                           first_node->next_nodes[i], i);
 929         }
 930     }
 931
 932   setup_output_node (vm, hw->output_node_index, hw_class);
 933   setup_tx_node (vm, hw->tx_node_index, dev_class);
 934
 935 no_output_nodes:
 936   /* Call all up/down callbacks with zero flags when interface is created. */
 937   vnet_sw_interface_set_flags_helper (vnm, hw->sw_if_index, /* flags */ 0,
 938                                       VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE);
 939   vnet_hw_interface_set_flags_helper (vnm, hw_index, /* flags */ 0,
 940                                       VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE);
 941   vec_free (tx_node_name);
 942   vec_free (output_node_name);
 943
 944   return hw_index;
 945 }
 946
 947 void
 948 vnet_delete_hw_interface (vnet_main_t * vnm, u32 hw_if_index)
 949 {
 950   vnet_interface_main_t *im = &vnm->interface_main;
 951   vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
 952   vlib_main_t *vm = vnm->vlib_main;
 953   vnet_device_class_t *dev_class = vnet_get_device_class (vnm,
 954                                                           hw->dev_class_index);
 955   /* If it is up, mark it down. */
 956   if (hw->flags != 0)
 957     vnet_hw_interface_set_flags (vnm, hw_if_index, /* flags */ 0);
 958
 959   /* Call delete callbacks. */
 960   call_hw_interface_add_del_callbacks (vnm, hw_if_index, /* is_create */ 0);
 961
 962   /* Delete any sub-interfaces. */
 963   {
 964     u32 id, sw_if_index;
 965     /* *INDENT-OFF* */
 966     hash_foreach (id, sw_if_index, hw->sub_interface_sw_if_index_by_id,
 967     ({
 968       vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
 969       u64 sup_and_sub_key =
 970         ((u64) (si->sup_sw_if_index) << 32) | (u64) si->sub.id;
 971       hash_unset_mem_free (&im->sw_if_index_by_sup_and_sub, &sup_and_sub_key);
 972       vnet_delete_sw_interface (vnm, sw_if_index);
 973     }));
 974     hash_free (hw->sub_interface_sw_if_index_by_id);
 975     /* *INDENT-ON* */
 976   }
 977
 978   /* Delete software interface corresponding to hardware interface. */
 979   vnet_delete_sw_interface (vnm, hw->sw_if_index);
 980
 981   if (dev_class->tx_function)
 982     {
 983       /* Put output/tx nodes into recycle pool */
 984       vnet_hw_interface_nodes_t *dn;
 985
 986       /* *INDENT-OFF* */
 987       foreach_vlib_main
 988         ({
 989           vnet_interface_output_runtime_t *rt =
 990             vlib_node_get_runtime_data (this_vlib_main, hw->output_node_index);
 991
 992           /* Mark node runtime as deleted so output node (if called)
 993            * will drop packets. */
 994           rt->is_deleted = 1;
 995         });
 996       /* *INDENT-ON* */
 997
 998       vlib_node_rename (vm, hw->output_node_index,
 999                         "interface-%d-output-deleted", hw_if_index);
1000       vlib_node_rename (vm, hw->tx_node_index, "interface-%d-tx-deleted",
1001                         hw_if_index);
1002       vec_add2 (im->deleted_hw_interface_nodes, dn, 1);
1003       dn->tx_node_index = hw->tx_node_index;
1004       dn->output_node_index = hw->output_node_index;
1005     }
1006
1007   hash_unset_mem (im->hw_interface_by_name, hw->name);
1008   vec_free (hw->name);
1009   vec_free (hw->hw_address);
1010   vec_free (hw->input_node_thread_index_by_queue);
1011   vec_free (hw->dq_runtime_index_by_queue);
1012
1013   pool_put (im->hw_interfaces, hw);
1014 }
1015
1016 void
1017 vnet_hw_interface_walk_sw (vnet_main_t * vnm,
1018                            u32 hw_if_index,
1019                            vnet_hw_sw_interface_walk_t fn, void *ctx)
1020 {
1021   vnet_hw_interface_t *hi;
1022   u32 id, sw_if_index;
1023
1024   hi = vnet_get_hw_interface (vnm, hw_if_index);
1025   /* the super first, then the sub interfaces */
1026   if (WALK_STOP == fn (vnm, hi->sw_if_index, ctx))
1027     return;
1028
1029   /* *INDENT-OFF* */
1030   hash_foreach (id, sw_if_index,
1031                 hi->sub_interface_sw_if_index_by_id,
1032   ({
1033     if (WALK_STOP == fn (vnm, sw_if_index, ctx))
1034       break;
1035   }));
1036   /* *INDENT-ON* */
1037 }
1038
1039 void
1040 vnet_hw_interface_walk (vnet_main_t * vnm,
1041                         vnet_hw_interface_walk_t fn, void *ctx)
1042 {
1043   vnet_interface_main_t *im;
1044   vnet_hw_interface_t *hi;
1045
1046   im = &vnm->interface_main;
1047
1048   /* *INDENT-OFF* */
1049   pool_foreach (hi, im->hw_interfaces,
1050   ({
1051     if (WALK_STOP == fn(vnm, hi->hw_if_index, ctx))
1052       break;
1053   }));
1054   /* *INDENT-ON* */
1055 }
1056
1057 void
1058 vnet_sw_interface_walk (vnet_main_t * vnm,
1059                         vnet_sw_interface_walk_t fn, void *ctx)
1060 {
1061   vnet_interface_main_t *im;
1062   vnet_sw_interface_t *si;
1063
1064   im = &vnm->interface_main;
1065
1066   /* *INDENT-OFF* */
1067   pool_foreach (si, im->sw_interfaces,
1068   {
1069     if (WALK_STOP == fn (vnm, si, ctx))
1070       break;
1071   });
1072   /* *INDENT-ON* */
1073 }
1074
1075 void
1076 vnet_hw_interface_init_for_class (vnet_main_t * vnm, u32 hw_if_index,
1077                                   u32 hw_class_index, u32 hw_instance)
1078 {
1079   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1080   vnet_hw_interface_class_t *hc =
1081     vnet_get_hw_interface_class (vnm, hw_class_index);
1082
1083   hi->hw_class_index = hw_class_index;
1084   hi->hw_instance = hw_instance;
1085   setup_output_node (vnm->vlib_main, hi->output_node_index, hc);
1086 }
1087
1088 static clib_error_t *
1089 vnet_hw_interface_set_class_helper (vnet_main_t * vnm, u32 hw_if_index,
1090                                     u32 hw_class_index, u32 redistribute)
1091 {
1092   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1093   vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, hi->sw_if_index);
1094   vnet_hw_interface_class_t *old_class =
1095     vnet_get_hw_interface_class (vnm, hi->hw_class_index);
1096   vnet_hw_interface_class_t *new_class =
1097     vnet_get_hw_interface_class (vnm, hw_class_index);
1098   vnet_device_class_t *dev_class =
1099     vnet_get_device_class (vnm, hi->dev_class_index);
1100   clib_error_t *error = 0;
1101
1102   /* New class equals old class?  Nothing to do. */
1103   if (hi->hw_class_index == hw_class_index)
1104     return 0;
1105
1106   /* No need (and incorrect since admin up flag may be set) to do error checking when
1107      receiving unserialize message. */
1108   if (redistribute)
1109     {
1110       if (si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
1111         return clib_error_return (0,
1112                                   "%v must be admin down to change class from %s to %s",
1113                                   hi->name, old_class->name, new_class->name);
1114
1115       /* Make sure interface supports given class. */
1116       if ((new_class->is_valid_class_for_interface
1117            && !new_class->is_valid_class_for_interface (vnm, hw_if_index,
1118                                                         hw_class_index))
1119           || (dev_class->is_valid_class_for_interface
1120               && !dev_class->is_valid_class_for_interface (vnm, hw_if_index,
1121                                                            hw_class_index)))
1122         return clib_error_return (0,
1123                                   "%v class cannot be changed from %s to %s",
1124                                   hi->name, old_class->name, new_class->name);
1125
1126     }
1127
1128   if (old_class->hw_class_change)
1129     old_class->hw_class_change (vnm, hw_if_index, old_class->index,
1130                                 new_class->index);
1131
1132   vnet_hw_interface_init_for_class (vnm, hw_if_index, new_class->index,
1133                                     /* instance */ ~0);
1134
1135   if (new_class->hw_class_change)
1136     new_class->hw_class_change (vnm, hw_if_index, old_class->index,
1137                                 new_class->index);
1138
1139   if (dev_class->hw_class_change)
1140     dev_class->hw_class_change (vnm, hw_if_index, new_class->index);
1141
1142   return error;
1143 }
1144
1145 clib_error_t *
1146 vnet_hw_interface_set_class (vnet_main_t * vnm, u32 hw_if_index,
1147                              u32 hw_class_index)
1148 {
1149   return vnet_hw_interface_set_class_helper (vnm, hw_if_index, hw_class_index,
1150                                              /* redistribute */ 1);
1151 }
1152
1153 static int
1154 vnet_hw_interface_rx_redirect_to_node_helper (vnet_main_t * vnm,
1155                                               u32 hw_if_index,
1156                                               u32 node_index,
1157                                               u32 redistribute)
1158 {
1159   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1160   vnet_device_class_t *dev_class = vnet_get_device_class
1161     (vnm, hi->dev_class_index);
1162
1163   if (dev_class->rx_redirect_to_node)
1164     {
1165       dev_class->rx_redirect_to_node (vnm, hw_if_index, node_index);
1166       return 0;
1167     }
1168
1169   return VNET_API_ERROR_UNIMPLEMENTED;
1170 }
1171
1172 int
1173 vnet_hw_interface_rx_redirect_to_node (vnet_main_t * vnm, u32 hw_if_index,
1174                                        u32 node_index)
1175 {
1176   return vnet_hw_interface_rx_redirect_to_node_helper (vnm, hw_if_index,
1177                                                        node_index,
1178                                                        1 /* redistribute */ );
1179 }
1180
1181 word
1182 vnet_sw_interface_compare (vnet_main_t * vnm,
1183                            uword sw_if_index0, uword sw_if_index1)
1184 {
1185   vnet_sw_interface_t *sup0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1186   vnet_sw_interface_t *sup1 = vnet_get_sup_sw_interface (vnm, sw_if_index1);
1187   vnet_hw_interface_t *h0 = vnet_get_hw_interface (vnm, sup0->hw_if_index);
1188   vnet_hw_interface_t *h1 = vnet_get_hw_interface (vnm, sup1->hw_if_index);
1189
1190   if (h0 != h1)
1191     return vec_cmp (h0->name, h1->name);
1192   return (word) h0->hw_instance - (word) h1->hw_instance;
1193 }
1194
1195 word
1196 vnet_hw_interface_compare (vnet_main_t * vnm,
1197                            uword hw_if_index0, uword hw_if_index1)
1198 {
1199   vnet_hw_interface_t *h0 = vnet_get_hw_interface (vnm, hw_if_index0);
1200   vnet_hw_interface_t *h1 = vnet_get_hw_interface (vnm, hw_if_index1);
1201
1202   if (h0 != h1)
1203     return vec_cmp (h0->name, h1->name);
1204   return (word) h0->hw_instance - (word) h1->hw_instance;
1205 }
1206
1207 int
1208 vnet_sw_interface_is_p2p (vnet_main_t * vnm, u32 sw_if_index)
1209 {
1210   vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
1211   if ((si->type == VNET_SW_INTERFACE_TYPE_P2P) ||
1212       (si->type == VNET_SW_INTERFACE_TYPE_PIPE))
1213     return 1;
1214
1215   vnet_hw_interface_t *hw = vnet_get_sup_hw_interface (vnm, sw_if_index);
1216   vnet_hw_interface_class_t *hc =
1217     vnet_get_hw_interface_class (vnm, hw->hw_class_index);
1218
1219   return (hc->flags & VNET_HW_INTERFACE_CLASS_FLAG_P2P);
1220 }
1221
1222 clib_error_t *
1223 vnet_interface_init (vlib_main_t * vm)
1224 {
1225   vnet_main_t *vnm = vnet_get_main ();
1226   vnet_interface_main_t *im = &vnm->interface_main;
1227   vlib_buffer_t *b = 0;
1228   vnet_buffer_opaque_t *o = 0;
1229   clib_error_t *error;
1230
1231   /*
1232    * Keep people from shooting themselves in the foot.
1233    */
1234   if (sizeof (b->opaque) != sizeof (vnet_buffer_opaque_t))
1235     {
1236 #define _(a) if (sizeof(o->a) > sizeof (o->unused))                     \
1237       clib_warning                                                      \
1238         ("FATAL: size of opaque union subtype %s is %d (max %d)",       \
1239          #a, sizeof(o->a), sizeof (o->unused));
1240       foreach_buffer_opaque_union_subtype;
1241 #undef _
1242
1243       return clib_error_return
1244         (0, "FATAL: size of vlib buffer opaque %d, size of vnet opaque %d",
1245          sizeof (b->opaque), sizeof (vnet_buffer_opaque_t));
1246     }
1247
1248   im->sw_if_counter_lock = clib_mem_alloc_aligned (CLIB_CACHE_LINE_BYTES,
1249                                                    CLIB_CACHE_LINE_BYTES);
1250   im->sw_if_counter_lock[0] = 1;        /* should be no need */
1251
1252   vec_validate (im->sw_if_counters, VNET_N_SIMPLE_INTERFACE_COUNTER - 1);
1253 #define _(E,n,p)                                                        \
1254   im->sw_if_counters[VNET_INTERFACE_COUNTER_##E].name = #n;             \
1255   im->sw_if_counters[VNET_INTERFACE_COUNTER_##E].stat_segment_name = "/" #p "/" #n;
1256   foreach_simple_interface_counter_name
1257 #undef _
1258     vec_validate (im->combined_sw_if_counters,
1259                   VNET_N_COMBINED_INTERFACE_COUNTER - 1);
1260 #define _(E,n,p)                                                        \
1261   im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_##E].name = #n;    \
1262   im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_##E].stat_segment_name = "/" #p "/" #n;
1263   foreach_combined_interface_counter_name
1264 #undef _
1265     im->sw_if_counter_lock[0] = 0;
1266
1267   im->device_class_by_name = hash_create_string ( /* size */ 0,
1268                                                  sizeof (uword));
1269   {
1270     vnet_device_class_t *c;
1271
1272     c = vnm->device_class_registrations;
1273
1274     while (c)
1275       {
1276         c->index = vec_len (im->device_classes);
1277         hash_set_mem (im->device_class_by_name, c->name, c->index);
1278
1279         if (c->tx_fn_registrations)
1280           {
1281             vlib_node_fn_registration_t *fnr = c->tx_fn_registrations;
1282             int priority = -1;
1283
1284             /* to avoid confusion, please remove ".tx_function" statement
1285                from VNET_DEVICE_CLASS() if using function candidates */
1286             ASSERT (c->tx_function == 0);
1287
1288             while (fnr)
1289               {
1290                 if (fnr->priority > priority)
1291                   {
1292                     priority = fnr->priority;
1293                     c->tx_function = fnr->function;
1294                   }
1295                 fnr = fnr->next_registration;
1296               }
1297           }
1298
1299         vec_add1 (im->device_classes, c[0]);
1300         c = c->next_class_registration;
1301       }
1302   }
1303
1304   im->hw_interface_class_by_name = hash_create_string ( /* size */ 0,
1305                                                        sizeof (uword));
1306
1307   im->sw_if_index_by_sup_and_sub = hash_create_mem (0, sizeof (u64),
1308                                                     sizeof (uword));
1309   {
1310     vnet_hw_interface_class_t *c;
1311
1312     c = vnm->hw_interface_class_registrations;
1313
1314     while (c)
1315       {
1316         c->index = vec_len (im->hw_interface_classes);
1317         hash_set_mem (im->hw_interface_class_by_name, c->name, c->index);
1318
1319         if (NULL == c->build_rewrite)
1320           c->build_rewrite = default_build_rewrite;
1321         if (NULL == c->update_adjacency)
1322           c->update_adjacency = default_update_adjacency;
1323
1324         vec_add1 (im->hw_interface_classes, c[0]);
1325         c = c->next_class_registration;
1326       }
1327   }
1328
1329   im->gso_interface_count = 0;
1330   /* init per-thread data */
1331   vec_validate_aligned (im->per_thread_data, vlib_num_workers (),
1332                         CLIB_CACHE_LINE_BYTES);
1333
1334   if ((error = vlib_call_init_function (vm, vnet_interface_cli_init)))
1335     return error;
1336
1337   vnm->interface_tag_by_sw_if_index = hash_create (0, sizeof (uword));
1338
1339 #if VLIB_BUFFER_TRACE_TRAJECTORY > 0
1340   if ((error = vlib_call_init_function (vm, trajectory_trace_init)))
1341     return error;
1342 #endif
1343
1344   return 0;
1345 }
1346
1347 VLIB_INIT_FUNCTION (vnet_interface_init);
1348
1349 /* Kludge to renumber interface names [only!] */
1350 int
1351 vnet_interface_name_renumber (u32 sw_if_index, u32 new_show_dev_instance)
1352 {
1353   int rv;
1354   vnet_main_t *vnm = vnet_get_main ();
1355   vnet_interface_main_t *im = &vnm->interface_main;
1356   vnet_hw_interface_t *hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
1357
1358   vnet_device_class_t *dev_class = vnet_get_device_class
1359     (vnm, hi->dev_class_index);
1360
1361   if (dev_class->name_renumber == 0 || dev_class->format_device_name == 0)
1362     return VNET_API_ERROR_UNIMPLEMENTED;
1363
1364   rv = dev_class->name_renumber (hi, new_show_dev_instance);
1365
1366   if (rv)
1367     return rv;
1368
1369   hash_unset_mem (im->hw_interface_by_name, hi->name);
1370   vec_free (hi->name);
1371   /* Use the mapping we set up to call it Ishmael */
1372   hi->name = format (0, "%U", dev_class->format_device_name,
1373                      hi->dev_instance);
1374
1375   hash_set_mem (im->hw_interface_by_name, hi->name, hi->hw_if_index);
1376   return rv;
1377 }
1378
1379 clib_error_t *
1380 vnet_rename_interface (vnet_main_t * vnm, u32 hw_if_index, char *new_name)
1381 {
1382   vnet_interface_main_t *im = &vnm->interface_main;
1383   vlib_main_t *vm = vnm->vlib_main;
1384   vnet_hw_interface_t *hw;
1385   u8 *old_name;
1386   clib_error_t *error = 0;
1387
1388   hw = vnet_get_hw_interface (vnm, hw_if_index);
1389   if (!hw)
1390     {
1391       return clib_error_return (0,
1392                                 "unable to find hw interface for index %u",
1393                                 hw_if_index);
1394     }
1395
1396   old_name = hw->name;
1397
1398   /* set new hw->name */
1399   hw->name = format (0, "%s", new_name);
1400
1401   /* remove the old name to hw_if_index mapping and install the new one */
1402   hash_unset_mem (im->hw_interface_by_name, old_name);
1403   hash_set_mem (im->hw_interface_by_name, hw->name, hw_if_index);
1404
1405   /* rename tx/output nodes */
1406   vlib_node_rename (vm, hw->tx_node_index, "%v-tx", hw->name);
1407   vlib_node_rename (vm, hw->output_node_index, "%v-output", hw->name);
1408
1409   /* free the old name vector */
1410   vec_free (old_name);
1411
1412   return error;
1413 }
1414
1415 static clib_error_t *
1416 vnet_hw_interface_change_mac_address_helper (vnet_main_t * vnm,
1417                                              u32 hw_if_index,
1418                                              const u8 * mac_address)
1419 {
1420   clib_error_t *error = 0;
1421   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1422
1423   if (hi->hw_address)
1424     {
1425       u8 *old_address = vec_dup (hi->hw_address);
1426       vnet_device_class_t *dev_class =
1427         vnet_get_device_class (vnm, hi->dev_class_index);
1428       if (dev_class->mac_addr_change_function)
1429         {
1430           error =
1431             dev_class->mac_addr_change_function (hi, old_address,
1432                                                  mac_address);
1433         }
1434       if (!error)
1435         {
1436           vnet_hw_interface_class_t *hw_class;
1437
1438           hw_class = vnet_get_hw_interface_class (vnm, hi->hw_class_index);
1439
1440           if (NULL != hw_class->mac_addr_change_function)
1441             hw_class->mac_addr_change_function (hi, old_address, mac_address);
1442         }
1443       else
1444         {
1445           error =
1446             clib_error_return (0,
1447                                "MAC Address Change is not supported on this interface");
1448         }
1449       vec_free (old_address);
1450     }
1451   else
1452     {
1453       error =
1454         clib_error_return (0,
1455                            "mac address change is not supported for interface index %u",
1456                            hw_if_index);
1457     }
1458   return error;
1459 }
1460
1461 clib_error_t *
1462 vnet_hw_interface_change_mac_address (vnet_main_t * vnm, u32 hw_if_index,
1463                                       const u8 * mac_address)
1464 {
1465   return vnet_hw_interface_change_mac_address_helper
1466     (vnm, hw_if_index, mac_address);
1467 }
1468
1469 /* update the unnumbered state of an interface*/
1470 void
1471 vnet_sw_interface_update_unnumbered (u32 unnumbered_sw_if_index,
1472                                      u32 ip_sw_if_index, u8 enable)
1473 {
1474   vnet_main_t *vnm = vnet_get_main ();
1475   vnet_sw_interface_t *si;
1476   u32 was_unnum;
1477
1478   si = vnet_get_sw_interface (vnm, unnumbered_sw_if_index);
1479   was_unnum = (si->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED);
1480
1481   if (enable)
1482     {
1483       si->flags |= VNET_SW_INTERFACE_FLAG_UNNUMBERED;
1484       si->unnumbered_sw_if_index = ip_sw_if_index;
1485
1486       ip4_main.lookup_main.if_address_pool_index_by_sw_if_index
1487         [unnumbered_sw_if_index] =
1488         ip4_main.
1489         lookup_main.if_address_pool_index_by_sw_if_index[ip_sw_if_index];
1490       ip6_main.
1491         lookup_main.if_address_pool_index_by_sw_if_index
1492         [unnumbered_sw_if_index] =
1493         ip6_main.
1494         lookup_main.if_address_pool_index_by_sw_if_index[ip_sw_if_index];
1495     }
1496   else
1497     {
1498       si->flags &= ~(VNET_SW_INTERFACE_FLAG_UNNUMBERED);
1499       si->unnumbered_sw_if_index = (u32) ~ 0;
1500
1501       ip4_main.lookup_main.if_address_pool_index_by_sw_if_index
1502         [unnumbered_sw_if_index] = ~0;
1503       ip6_main.lookup_main.if_address_pool_index_by_sw_if_index
1504         [unnumbered_sw_if_index] = ~0;
1505     }
1506
1507   if (was_unnum != (si->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED))
1508     {
1509       ip4_sw_interface_enable_disable (unnumbered_sw_if_index, enable);
1510       ip6_sw_interface_enable_disable (unnumbered_sw_if_index, enable);
1511     }
1512 }
1513
1514 vnet_l3_packet_type_t
1515 vnet_link_to_l3_proto (vnet_link_t link)
1516 {
1517   switch (link)
1518     {
1519     case VNET_LINK_IP4:
1520       return (VNET_L3_PACKET_TYPE_IP4);
1521     case VNET_LINK_IP6:
1522       return (VNET_L3_PACKET_TYPE_IP6);
1523     case VNET_LINK_MPLS:
1524       return (VNET_L3_PACKET_TYPE_MPLS);
1525     case VNET_LINK_ARP:
1526       return (VNET_L3_PACKET_TYPE_ARP);
1527     case VNET_LINK_ETHERNET:
1528     case VNET_LINK_NSH:
1529       ASSERT (0);
1530       break;
1531     }
1532   ASSERT (0);
1533   return (0);
1534 }
1535
1536 vnet_mtu_t
1537 vnet_link_to_mtu (vnet_link_t link)
1538 {
1539   switch (link)
1540     {
1541     case VNET_LINK_IP4:
1542       return (VNET_MTU_IP4);
1543     case VNET_LINK_IP6:
1544       return (VNET_MTU_IP6);
1545     case VNET_LINK_MPLS:
1546       return (VNET_MTU_MPLS);
1547     default:
1548       return (VNET_MTU_L3);
1549     }
1550 }
1551
1552 u8 *
1553 default_build_rewrite (vnet_main_t * vnm,
1554                        u32 sw_if_index,
1555                        vnet_link_t link_type, const void *dst_address)
1556 {
1557   return (NULL);
1558 }
1559
1560 void
1561 default_update_adjacency (vnet_main_t * vnm, u32 sw_if_index, u32 ai)
1562 {
1563   ip_adjacency_t *adj;
1564
1565   adj = adj_get (ai);
1566
1567   switch (adj->lookup_next_index)
1568     {
1569     case IP_LOOKUP_NEXT_GLEAN:
1570       adj_glean_update_rewrite (ai);
1571       break;
1572     case IP_LOOKUP_NEXT_ARP:
1573     case IP_LOOKUP_NEXT_BCAST:
1574       /*
1575        * default rewrite in neighbour adj
1576        */
1577       adj_nbr_update_rewrite
1578         (ai,
1579          ADJ_NBR_REWRITE_FLAG_COMPLETE,
1580          vnet_build_rewrite_for_sw_interface (vnm,
1581                                               sw_if_index,
1582                                               adj_get_link_type (ai), NULL));
1583       break;
1584     case IP_LOOKUP_NEXT_MCAST:
1585       /*
1586        * mcast traffic also uses default rewrite string with no mcast
1587        * switch time updates.
1588        */
1589       adj_mcast_update_rewrite
1590         (ai,
1591          vnet_build_rewrite_for_sw_interface (vnm,
1592                                               sw_if_index,
1593                                               adj_get_link_type (ai),
1594                                               NULL), 0);
1595       break;
1596     case IP_LOOKUP_NEXT_DROP:
1597     case IP_LOOKUP_NEXT_PUNT:
1598     case IP_LOOKUP_NEXT_LOCAL:
1599     case IP_LOOKUP_NEXT_REWRITE:
1600     case IP_LOOKUP_NEXT_MCAST_MIDCHAIN:
1601     case IP_LOOKUP_NEXT_MIDCHAIN:
1602     case IP_LOOKUP_NEXT_ICMP_ERROR:
1603     case IP_LOOKUP_N_NEXT:
1604       ASSERT (0);
1605       break;
1606     }
1607 }
1608
1609 int collect_detailed_interface_stats_flag = 0;
1610
1611 void
1612 collect_detailed_interface_stats_flag_set (void)
1613 {
1614   collect_detailed_interface_stats_flag = 1;
1615 }
1616
1617 void
1618 collect_detailed_interface_stats_flag_clear (void)
1619 {
1620   collect_detailed_interface_stats_flag = 0;
1621 }
1622
1623 static clib_error_t *
1624 collect_detailed_interface_stats_cli (vlib_main_t * vm,
1625                                       unformat_input_t * input,
1626                                       vlib_cli_command_t * cmd)
1627 {
1628   unformat_input_t _line_input, *line_input = &_line_input;
1629   clib_error_t *error = NULL;
1630
1631   /* Get a line of input. */
1632   if (!unformat_user (input, unformat_line_input, line_input))
1633     return clib_error_return (0, "expected enable | disable");
1634
1635   while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
1636     {
1637       if (unformat (line_input, "enable") || unformat (line_input, "on"))
1638         collect_detailed_interface_stats_flag_set ();
1639       else if (unformat (line_input, "disable")
1640                || unformat (line_input, "off"))
1641         collect_detailed_interface_stats_flag_clear ();
1642       else
1643         {
1644           error = clib_error_return (0, "unknown input `%U'",
1645                                      format_unformat_error, line_input);
1646           goto done;
1647         }
1648     }
1649
1650 done:
1651   unformat_free (line_input);
1652   return error;
1653 }
1654
1655 /* *INDENT-OFF* */
1656 VLIB_CLI_COMMAND (collect_detailed_interface_stats_command, static) = {
1657   .path = "interface collect detailed-stats",
1658   .short_help = "interface collect detailed-stats <enable|disable>",
1659   .function = collect_detailed_interface_stats_cli,
1660 };
1661 /* *INDENT-ON* */
1662
1663 /*
1664  * fd.io coding-style-patch-verification: ON
1665  *
1666  * Local Variables:
1667  * eval: (c-set-style "gnu")
1668  * End:
1669  */