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
  46 #define VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE (1 << 0)
  47 #define VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE (1 << 1)
  48
  49 static clib_error_t *vnet_hw_interface_set_flags_helper (vnet_main_t * vnm,
  50                                                          u32 hw_if_index,
  51                                                          u32 flags,
  52                                                          u32 helper_flags);
  53
  54 static clib_error_t *vnet_sw_interface_set_flags_helper (vnet_main_t * vnm,
  55                                                          u32 sw_if_index,
  56                                                          u32 flags,
  57                                                          u32 helper_flags);
  58
  59 static clib_error_t *vnet_hw_interface_set_class_helper (vnet_main_t * vnm,
  60                                                          u32 hw_if_index,
  61                                                          u32 hw_class_index,
  62                                                          u32 redistribute);
  63
  64 typedef struct
  65 {
  66   /* Either sw or hw interface index. */
  67   u32 sw_hw_if_index;
  68
  69   /* Flags. */
  70   u32 flags;
  71 } vnet_sw_hw_interface_state_t;
  72
  73 static void
  74 serialize_vec_vnet_sw_hw_interface_state (serialize_main_t * m, va_list * va)
  75 {
  76   vnet_sw_hw_interface_state_t *s =
  77     va_arg (*va, vnet_sw_hw_interface_state_t *);
  78   u32 n = va_arg (*va, u32);
  79   u32 i;
  80   for (i = 0; i < n; i++)
  81     {
  82       serialize_integer (m, s[i].sw_hw_if_index,
  83                          sizeof (s[i].sw_hw_if_index));
  84       serialize_integer (m, s[i].flags, sizeof (s[i].flags));
  85     }
  86 }
  87
  88 static void
  89 unserialize_vec_vnet_sw_hw_interface_state (serialize_main_t * m,
  90                                             va_list * va)
  91 {
  92   vnet_sw_hw_interface_state_t *s =
  93     va_arg (*va, vnet_sw_hw_interface_state_t *);
  94   u32 n = va_arg (*va, u32);
  95   u32 i;
  96   for (i = 0; i < n; i++)
  97     {
  98       unserialize_integer (m, &s[i].sw_hw_if_index,
  99                            sizeof (s[i].sw_hw_if_index));
 100       unserialize_integer (m, &s[i].flags, sizeof (s[i].flags));
 101     }
 102 }
 103
 104 static void
 105 serialize_vnet_sw_hw_interface_set_flags (serialize_main_t * m, va_list * va)
 106 {
 107   vnet_sw_hw_interface_state_t *s =
 108     va_arg (*va, vnet_sw_hw_interface_state_t *);
 109   serialize (m, serialize_vec_vnet_sw_hw_interface_state, s, 1);
 110 }
 111
 112 static void
 113 unserialize_vnet_sw_interface_set_flags (serialize_main_t * m, va_list * va)
 114 {
 115   CLIB_UNUSED (mc_main_t * mc) = va_arg (*va, mc_main_t *);
 116   vnet_sw_hw_interface_state_t s;
 117
 118   unserialize (m, unserialize_vec_vnet_sw_hw_interface_state, &s, 1);
 119
 120   vnet_sw_interface_set_flags_helper
 121     (vnet_get_main (), s.sw_hw_if_index, s.flags,
 122      /* helper_flags no redistribution */ 0);
 123 }
 124
 125 static void
 126 unserialize_vnet_hw_interface_set_flags (serialize_main_t * m, va_list * va)
 127 {
 128   CLIB_UNUSED (mc_main_t * mc) = va_arg (*va, mc_main_t *);
 129   vnet_sw_hw_interface_state_t s;
 130
 131   unserialize (m, unserialize_vec_vnet_sw_hw_interface_state, &s, 1);
 132
 133   vnet_hw_interface_set_flags_helper
 134     (vnet_get_main (), s.sw_hw_if_index, s.flags,
 135      /* helper_flags no redistribution */ 0);
 136 }
 137
 138 MC_SERIALIZE_MSG (vnet_sw_interface_set_flags_msg, static) =
 139 {
 140 .name = "vnet_sw_interface_set_flags",.serialize =
 141     serialize_vnet_sw_hw_interface_set_flags,.unserialize =
 142     unserialize_vnet_sw_interface_set_flags,};
 143
 144 MC_SERIALIZE_MSG (vnet_hw_interface_set_flags_msg, static) =
 145 {
 146 .name = "vnet_hw_interface_set_flags",.serialize =
 147     serialize_vnet_sw_hw_interface_set_flags,.unserialize =
 148     unserialize_vnet_hw_interface_set_flags,};
 149
 150 void
 151 serialize_vnet_interface_state (serialize_main_t * m, va_list * va)
 152 {
 153   vnet_main_t *vnm = va_arg (*va, vnet_main_t *);
 154   vnet_sw_hw_interface_state_t *sts = 0, *st;
 155   vnet_sw_interface_t *sif;
 156   vnet_hw_interface_t *hif;
 157   vnet_interface_main_t *im = &vnm->interface_main;
 158
 159   /* Serialize hardware interface classes since they may have changed.
 160      Must do this before sending up/down flags. */
 161   /* *INDENT-OFF* */
 162   pool_foreach (hif, im->hw_interfaces, ({
 163     vnet_hw_interface_class_t * hw_class = vnet_get_hw_interface_class (vnm, hif->hw_class_index);
 164     serialize_cstring (m, hw_class->name);
 165   }));
 166   /* *INDENT-ON* */
 167
 168   /* Send sw/hw interface state when non-zero. */
 169   /* *INDENT-OFF* */
 170   pool_foreach (sif, im->sw_interfaces, ({
 171     if (sif->flags != 0)
 172       {
 173         vec_add2 (sts, st, 1);
 174         st->sw_hw_if_index = sif->sw_if_index;
 175         st->flags = sif->flags;
 176       }
 177   }));
 178   /* *INDENT-ON* */
 179
 180   vec_serialize (m, sts, serialize_vec_vnet_sw_hw_interface_state);
 181
 182   if (sts)
 183     _vec_len (sts) = 0;
 184
 185   /* *INDENT-OFF* */
 186   pool_foreach (hif, im->hw_interfaces, ({
 187     if (hif->flags != 0)
 188       {
 189         vec_add2 (sts, st, 1);
 190         st->sw_hw_if_index = hif->hw_if_index;
 191         st->flags = hif->flags;
 192       }
 193   }));
 194   /* *INDENT-ON* */
 195
 196   vec_serialize (m, sts, serialize_vec_vnet_sw_hw_interface_state);
 197
 198   vec_free (sts);
 199 }
 200
 201 void
 202 unserialize_vnet_interface_state (serialize_main_t * m, va_list * va)
 203 {
 204   vnet_main_t *vnm = va_arg (*va, vnet_main_t *);
 205   vnet_sw_hw_interface_state_t *sts = 0, *st;
 206
 207   /* First set interface hardware class. */
 208   {
 209     vnet_interface_main_t *im = &vnm->interface_main;
 210     vnet_hw_interface_t *hif;
 211     char *class_name;
 212     uword *p;
 213     clib_error_t *error;
 214
 215     /* *INDENT-OFF* */
 216     pool_foreach (hif, im->hw_interfaces, ({
 217       unserialize_cstring (m, &class_name);
 218       p = hash_get_mem (im->hw_interface_class_by_name, class_name);
 219       ASSERT (p != 0);
 220       error = vnet_hw_interface_set_class_helper (vnm, hif->hw_if_index, p[0], /* redistribute */ 0);
 221       if (error)
 222         clib_error_report (error);
 223       vec_free (class_name);
 224     }));
 225     /* *INDENT-ON* */
 226   }
 227
 228   vec_unserialize (m, &sts, unserialize_vec_vnet_sw_hw_interface_state);
 229   vec_foreach (st, sts)
 230     vnet_sw_interface_set_flags_helper (vnm, st->sw_hw_if_index, st->flags,
 231                                         /* no distribute */ 0);
 232   vec_free (sts);
 233
 234   vec_unserialize (m, &sts, unserialize_vec_vnet_sw_hw_interface_state);
 235   vec_foreach (st, sts)
 236     vnet_hw_interface_set_flags_helper (vnm, st->sw_hw_if_index, st->flags,
 237                                         /* no distribute */ 0);
 238   vec_free (sts);
 239 }
 240
 241 static clib_error_t *
 242 call_elf_section_interface_callbacks (vnet_main_t * vnm, u32 if_index,
 243                                       u32 flags,
 244                                       _vnet_interface_function_list_elt_t **
 245                                       elts)
 246 {
 247   _vnet_interface_function_list_elt_t *elt;
 248   vnet_interface_function_priority_t prio;
 249   clib_error_t *error = 0;
 250
 251   for (prio = VNET_ITF_FUNC_PRIORITY_LOW;
 252        prio <= VNET_ITF_FUNC_PRIORITY_HIGH; prio++)
 253     {
 254       elt = elts[prio];
 255
 256       while (elt)
 257         {
 258           error = elt->fp (vnm, if_index, flags);
 259           if (error)
 260             return error;
 261           elt = elt->next_interface_function;
 262         }
 263     }
 264   return error;
 265 }
 266
 267 static clib_error_t *
 268 call_hw_interface_add_del_callbacks (vnet_main_t * vnm, u32 hw_if_index,
 269                                      u32 is_create)
 270 {
 271   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
 272   vnet_hw_interface_class_t *hw_class =
 273     vnet_get_hw_interface_class (vnm, hi->hw_class_index);
 274   vnet_device_class_t *dev_class =
 275     vnet_get_device_class (vnm, hi->dev_class_index);
 276   clib_error_t *error = 0;
 277
 278   if (hw_class->interface_add_del_function
 279       && (error =
 280           hw_class->interface_add_del_function (vnm, hw_if_index, is_create)))
 281     return error;
 282
 283   if (dev_class->interface_add_del_function
 284       && (error =
 285           dev_class->interface_add_del_function (vnm, hw_if_index,
 286                                                  is_create)))
 287     return error;
 288
 289   error = call_elf_section_interface_callbacks
 290     (vnm, hw_if_index, is_create, vnm->hw_interface_add_del_functions);
 291
 292   return error;
 293 }
 294
 295 static clib_error_t *
 296 call_sw_interface_add_del_callbacks (vnet_main_t * vnm, u32 sw_if_index,
 297                                      u32 is_create)
 298 {
 299   return call_elf_section_interface_callbacks
 300     (vnm, sw_if_index, is_create, vnm->sw_interface_add_del_functions);
 301 }
 302
 303 #define VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE (1 << 0)
 304 #define VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE (1 << 1)
 305
 306 static clib_error_t *
 307 vnet_hw_interface_set_flags_helper (vnet_main_t * vnm, u32 hw_if_index,
 308                                     u32 flags, u32 helper_flags)
 309 {
 310   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
 311   vnet_hw_interface_class_t *hw_class =
 312     vnet_get_hw_interface_class (vnm, hi->hw_class_index);
 313   vnet_device_class_t *dev_class =
 314     vnet_get_device_class (vnm, hi->dev_class_index);
 315   vlib_main_t *vm = vnm->vlib_main;
 316   u32 mask;
 317   clib_error_t *error = 0;
 318   u32 is_create =
 319     (helper_flags & VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE) != 0;
 320
 321   mask =
 322     (VNET_HW_INTERFACE_FLAG_LINK_UP | VNET_HW_INTERFACE_FLAG_DUPLEX_MASK |
 323      VNET_HW_INTERFACE_FLAG_SPEED_MASK);
 324   flags &= mask;
 325
 326   /* Call hardware interface add/del callbacks. */
 327   if (is_create)
 328     call_hw_interface_add_del_callbacks (vnm, hw_if_index, is_create);
 329
 330   /* Already in the desired state? */
 331   if (!is_create && (hi->flags & mask) == flags)
 332     goto done;
 333
 334   /* Some interface classes do not redistribute (e.g. are local). */
 335   if (!dev_class->redistribute)
 336     helper_flags &= ~VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE;
 337
 338   if (vm->mc_main
 339       && (helper_flags & VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE))
 340     {
 341       vnet_sw_hw_interface_state_t s;
 342       s.sw_hw_if_index = hw_if_index;
 343       s.flags = flags;
 344       mc_serialize (vm->mc_main, &vnet_hw_interface_set_flags_msg, &s);
 345     }
 346
 347   if ((hi->flags & VNET_HW_INTERFACE_FLAG_LINK_UP) !=
 348       (flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
 349     {
 350       /* Do hardware class (e.g. ethernet). */
 351       if (hw_class->link_up_down_function
 352           && (error = hw_class->link_up_down_function (vnm, hw_if_index,
 353                                                        flags)))
 354         goto done;
 355
 356       error = call_elf_section_interface_callbacks
 357         (vnm, hw_if_index, flags, vnm->hw_interface_link_up_down_functions);
 358
 359       if (error)
 360         goto done;
 361     }
 362
 363   hi->flags &= ~mask;
 364   hi->flags |= flags;
 365
 366 done:
 367   return error;
 368 }
 369
 370 static clib_error_t *
 371 vnet_sw_interface_set_flags_helper (vnet_main_t * vnm, u32 sw_if_index,
 372                                     u32 flags, u32 helper_flags)
 373 {
 374   vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
 375   vlib_main_t *vm = vnm->vlib_main;
 376   u32 mask;
 377   clib_error_t *error = 0;
 378   u32 is_create =
 379     (helper_flags & VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE) != 0;
 380   u32 old_flags;
 381
 382   mask = VNET_SW_INTERFACE_FLAG_ADMIN_UP | VNET_SW_INTERFACE_FLAG_PUNT;
 383   flags &= mask;
 384
 385   if (is_create)
 386     {
 387       error =
 388         call_sw_interface_add_del_callbacks (vnm, sw_if_index, is_create);
 389       if (error)
 390         goto done;
 391
 392       if (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
 393         {
 394           /* Notify everyone when the interface is created as admin up */
 395           error = call_elf_section_interface_callbacks (vnm, sw_if_index,
 396                                                         flags,
 397                                                         vnm->
 398                                                         sw_interface_admin_up_down_functions);
 399           if (error)
 400             goto done;
 401         }
 402     }
 403   else
 404     {
 405       vnet_sw_interface_t *si_sup = si;
 406
 407       /* Check that super interface is in correct state. */
 408       if (si->type == VNET_SW_INTERFACE_TYPE_SUB)
 409         {
 410           si_sup = vnet_get_sw_interface (vnm, si->sup_sw_if_index);
 411
 412           /* Check to see if we're bringing down the soft interface and if it's parent is up */
 413           if ((flags != (si_sup->flags & mask)) &&
 414               (!((flags == 0)
 415                  && ((si_sup->flags & mask) ==
 416                      VNET_SW_INTERFACE_FLAG_ADMIN_UP))))
 417             {
 418               error = clib_error_return (0, "super-interface %U must be %U",
 419                                          format_vnet_sw_interface_name, vnm,
 420                                          si_sup,
 421                                          format_vnet_sw_interface_flags,
 422                                          flags);
 423               goto done;
 424             }
 425         }
 426
 427       /* Donot change state for slave link of bonded interfaces */
 428       if (si->flags & VNET_SW_INTERFACE_FLAG_BOND_SLAVE)
 429         {
 430           error = clib_error_return
 431             (0, "not allowed as %U belong to a BondEthernet interface",
 432              format_vnet_sw_interface_name, vnm, si);
 433           goto done;
 434         }
 435
 436       /* Already in the desired state? */
 437       if ((si->flags & mask) == flags)
 438         goto done;
 439
 440       /* Sub-interfaces of hardware interfaces that do no redistribute,
 441          do not redistribute themselves. */
 442       if (si_sup->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
 443         {
 444           vnet_hw_interface_t *hi =
 445             vnet_get_hw_interface (vnm, si_sup->hw_if_index);
 446           vnet_device_class_t *dev_class =
 447             vnet_get_device_class (vnm, hi->dev_class_index);
 448           if (!dev_class->redistribute)
 449             helper_flags &=
 450               ~VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE;
 451         }
 452
 453       if (vm->mc_main
 454           && (helper_flags &
 455               VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE))
 456         {
 457           vnet_sw_hw_interface_state_t s;
 458           s.sw_hw_if_index = sw_if_index;
 459           s.flags = flags;
 460           mc_serialize (vm->mc_main, &vnet_sw_interface_set_flags_msg, &s);
 461         }
 462
 463       /* set the flags now before invoking the registered clients
 464        * so that the state they query is consistent with the state here notified */
 465       old_flags = si->flags;
 466       si->flags &= ~mask;
 467       si->flags |= flags;
 468       if ((flags | old_flags) & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
 469         error = call_elf_section_interface_callbacks
 470           (vnm, sw_if_index, flags,
 471            vnm->sw_interface_admin_up_down_functions);
 472
 473       if (error)
 474         {
 475           /* restore flags on error */
 476           si->flags = old_flags;
 477           goto done;
 478         }
 479
 480       if (si->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
 481         {
 482           vnet_hw_interface_t *hi =
 483             vnet_get_hw_interface (vnm, si->hw_if_index);
 484           vnet_hw_interface_class_t *hw_class =
 485             vnet_get_hw_interface_class (vnm, hi->hw_class_index);
 486           vnet_device_class_t *dev_class =
 487             vnet_get_device_class (vnm, hi->dev_class_index);
 488
 489           if ((flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) &&
 490               (si->flags & VNET_SW_INTERFACE_FLAG_ERROR))
 491             {
 492               error = clib_error_return (0, "Interface in the error state");
 493               goto done;
 494             }
 495
 496           /* save the si admin up flag */
 497           old_flags = si->flags;
 498
 499           /* update si admin up flag in advance if we are going admin down */
 500           if (!(flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
 501             si->flags &= ~VNET_SW_INTERFACE_FLAG_ADMIN_UP;
 502
 503           if (dev_class->admin_up_down_function
 504               && (error = dev_class->admin_up_down_function (vnm,
 505                                                              si->hw_if_index,
 506                                                              flags)))
 507             {
 508               /* restore si admin up flag to it's original state on errors */
 509               si->flags = old_flags;
 510               goto done;
 511             }
 512
 513           if (hw_class->admin_up_down_function
 514               && (error = hw_class->admin_up_down_function (vnm,
 515                                                             si->hw_if_index,
 516                                                             flags)))
 517             {
 518               /* restore si admin up flag to it's original state on errors */
 519               si->flags = old_flags;
 520               goto done;
 521             }
 522
 523           /* Admin down implies link down. */
 524           if (!(flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
 525               && (hi->flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
 526             vnet_hw_interface_set_flags_helper (vnm, si->hw_if_index,
 527                                                 hi->flags &
 528                                                 ~VNET_HW_INTERFACE_FLAG_LINK_UP,
 529                                                 helper_flags);
 530         }
 531     }
 532
 533   si->flags &= ~mask;
 534   si->flags |= flags;
 535
 536 done:
 537   return error;
 538 }
 539
 540 clib_error_t *
 541 vnet_hw_interface_set_flags (vnet_main_t * vnm, u32 hw_if_index, u32 flags)
 542 {
 543   return vnet_hw_interface_set_flags_helper
 544     (vnm, hw_if_index, flags,
 545      VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE);
 546 }
 547
 548 clib_error_t *
 549 vnet_sw_interface_set_flags (vnet_main_t * vnm, u32 sw_if_index, u32 flags)
 550 {
 551   return vnet_sw_interface_set_flags_helper
 552     (vnm, sw_if_index, flags,
 553      VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE);
 554 }
 555
 556 static u32
 557 vnet_create_sw_interface_no_callbacks (vnet_main_t * vnm,
 558                                        vnet_sw_interface_t * template)
 559 {
 560   vnet_interface_main_t *im = &vnm->interface_main;
 561   vnet_sw_interface_t *sw;
 562   u32 sw_if_index;
 563
 564   pool_get (im->sw_interfaces, sw);
 565   sw_if_index = sw - im->sw_interfaces;
 566
 567   sw[0] = template[0];
 568
 569   sw->flags = 0;
 570   sw->sw_if_index = sw_if_index;
 571   if (sw->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
 572     sw->sup_sw_if_index = sw->sw_if_index;
 573
 574   /* Allocate counters for this interface. */
 575   {
 576     u32 i;
 577
 578     vnet_interface_counter_lock (im);
 579
 580     for (i = 0; i < vec_len (im->sw_if_counters); i++)
 581       {
 582         vlib_validate_simple_counter (&im->sw_if_counters[i], sw_if_index);
 583         vlib_zero_simple_counter (&im->sw_if_counters[i], sw_if_index);
 584       }
 585
 586     for (i = 0; i < vec_len (im->combined_sw_if_counters); i++)
 587       {
 588         vlib_validate_combined_counter (&im->combined_sw_if_counters[i],
 589                                         sw_if_index);
 590         vlib_zero_combined_counter (&im->combined_sw_if_counters[i],
 591                                     sw_if_index);
 592       }
 593
 594     vnet_interface_counter_unlock (im);
 595   }
 596
 597   return sw_if_index;
 598 }
 599
 600 clib_error_t *
 601 vnet_create_sw_interface (vnet_main_t * vnm, vnet_sw_interface_t * template,
 602                           u32 * sw_if_index)
 603 {
 604   clib_error_t *error;
 605   vnet_hw_interface_t *hi;
 606   vnet_device_class_t *dev_class;
 607
 608   hi = vnet_get_sup_hw_interface (vnm, template->sup_sw_if_index);
 609   dev_class = vnet_get_device_class (vnm, hi->dev_class_index);
 610
 611   if (template->type == VNET_SW_INTERFACE_TYPE_SUB &&
 612       dev_class->subif_add_del_function)
 613     {
 614       error = dev_class->subif_add_del_function (vnm, hi->hw_if_index,
 615                                                  (struct vnet_sw_interface_t
 616                                                   *) template, 1);
 617       if (error)
 618         return error;
 619     }
 620
 621   *sw_if_index = vnet_create_sw_interface_no_callbacks (vnm, template);
 622   error = vnet_sw_interface_set_flags_helper
 623     (vnm, *sw_if_index, template->flags,
 624      VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE);
 625
 626   if (error)
 627     {
 628       /* undo the work done by vnet_create_sw_interface_no_callbacks() */
 629       vnet_interface_main_t *im = &vnm->interface_main;
 630       vnet_sw_interface_t *sw =
 631         pool_elt_at_index (im->sw_interfaces, *sw_if_index);
 632       pool_put (im->sw_interfaces, sw);
 633     }
 634
 635   return error;
 636 }
 637
 638 void
 639 vnet_delete_sw_interface (vnet_main_t * vnm, u32 sw_if_index)
 640 {
 641   vnet_interface_main_t *im = &vnm->interface_main;
 642   vnet_sw_interface_t *sw =
 643     pool_elt_at_index (im->sw_interfaces, sw_if_index);
 644
 645   /* Check if the interface has config and is removed from L2 BD or XConnect */
 646   vlib_main_t *vm = vlib_get_main ();
 647   l2_input_config_t *config;
 648   if (sw_if_index < vec_len (l2input_main.configs))
 649     {
 650       config = vec_elt_at_index (l2input_main.configs, sw_if_index);
 651       if (config->xconnect)
 652         set_int_l2_mode (vm, vnm, MODE_L3, config->output_sw_if_index, 0, 0,
 653                          0, 0);
 654       if (config->xconnect || config->bridge)
 655         set_int_l2_mode (vm, vnm, MODE_L3, sw_if_index, 0, 0, 0, 0);
 656     }
 657   vnet_clear_sw_interface_tag (vnm, sw_if_index);
 658
 659   /* Bring down interface in case it is up. */
 660   if (sw->flags != 0)
 661     vnet_sw_interface_set_flags (vnm, sw_if_index, /* flags */ 0);
 662
 663   call_sw_interface_add_del_callbacks (vnm, sw_if_index, /* is_create */ 0);
 664
 665   pool_put (im->sw_interfaces, sw);
 666 }
 667
 668 static clib_error_t *
 669 call_sw_interface_mtu_change_callbacks (vnet_main_t * vnm, u32 sw_if_index)
 670 {
 671   return call_elf_section_interface_callbacks
 672     (vnm, sw_if_index, 0, vnm->sw_interface_mtu_change_functions);
 673 }
 674
 675 void
 676 vnet_sw_interface_set_mtu (vnet_main_t * vnm, u32 sw_if_index, u32 mtu)
 677 {
 678   vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
 679
 680   if (si->mtu[VNET_MTU_L3] != mtu)
 681     {
 682       si->mtu[VNET_MTU_L3] = mtu;
 683       call_sw_interface_mtu_change_callbacks (vnm, sw_if_index);
 684     }
 685 }
 686
 687 void
 688 vnet_sw_interface_set_protocol_mtu (vnet_main_t * vnm, u32 sw_if_index,
 689                                     u32 mtu[])
 690 {
 691   vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
 692   bool changed = false;
 693   int i;
 694
 695   for (i = 0; i < VNET_N_MTU; i++)
 696     {
 697       if (si->mtu[i] != mtu[i])
 698         {
 699           si->mtu[i] = mtu[i];
 700           changed = true;
 701         }
 702     }
 703   /* Notify interested parties */
 704   if (changed)
 705     call_sw_interface_mtu_change_callbacks (vnm, sw_if_index);
 706 }
 707
 708 /*
 709  * Reflect a change in hardware MTU on protocol MTUs
 710  */
 711 static walk_rc_t
 712 sw_interface_walk_callback (vnet_main_t * vnm, u32 sw_if_index, void *ctx)
 713 {
 714   u32 *link_mtu = ctx;
 715   vnet_sw_interface_set_mtu (vnm, sw_if_index, *link_mtu);
 716   return WALK_CONTINUE;
 717 }
 718
 719 void
 720 vnet_hw_interface_set_mtu (vnet_main_t * vnm, u32 hw_if_index, u32 mtu)
 721 {
 722   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
 723
 724   if (hi->max_packet_bytes != mtu)
 725     {
 726       hi->max_packet_bytes = mtu;
 727       ethernet_set_flags (vnm, hw_if_index, ETHERNET_INTERFACE_FLAG_MTU);
 728       vnet_hw_interface_walk_sw (vnm, hw_if_index, sw_interface_walk_callback,
 729                                  &mtu);
 730     }
 731 }
 732
 733 static void
 734 setup_tx_node (vlib_main_t * vm,
 735                u32 node_index, vnet_device_class_t * dev_class)
 736 {
 737   vlib_node_t *n = vlib_get_node (vm, node_index);
 738
 739   n->function = dev_class->tx_function;
 740   n->format_trace = dev_class->format_tx_trace;
 741
 742   vlib_register_errors (vm, node_index,
 743                         dev_class->tx_function_n_errors,
 744                         dev_class->tx_function_error_strings);
 745 }
 746
 747 static void
 748 setup_output_node (vlib_main_t * vm,
 749                    u32 node_index, vnet_hw_interface_class_t * hw_class)
 750 {
 751   vlib_node_t *n = vlib_get_node (vm, node_index);
 752   n->format_buffer = hw_class->format_header;
 753   n->unformat_buffer = hw_class->unformat_header;
 754 }
 755
 756 /* Register an interface instance. */
 757 u32
 758 vnet_register_interface (vnet_main_t * vnm,
 759                          u32 dev_class_index,
 760                          u32 dev_instance,
 761                          u32 hw_class_index, u32 hw_instance)
 762 {
 763   vnet_interface_main_t *im = &vnm->interface_main;
 764   vnet_hw_interface_t *hw;
 765   vnet_device_class_t *dev_class =
 766     vnet_get_device_class (vnm, dev_class_index);
 767   vnet_hw_interface_class_t *hw_class =
 768     vnet_get_hw_interface_class (vnm, hw_class_index);
 769   vlib_main_t *vm = vnm->vlib_main;
 770   vnet_feature_config_main_t *fcm;
 771   vnet_config_main_t *cm;
 772   u32 hw_index, i;
 773   char *tx_node_name = NULL, *output_node_name = NULL;
 774
 775   pool_get (im->hw_interfaces, hw);
 776   memset (hw, 0, sizeof (*hw));
 777
 778   hw_index = hw - im->hw_interfaces;
 779   hw->hw_if_index = hw_index;
 780   hw->default_rx_mode = VNET_HW_INTERFACE_RX_MODE_POLLING;
 781
 782   if (dev_class->format_device_name)
 783     hw->name = format (0, "%U", dev_class->format_device_name, dev_instance);
 784   else if (hw_class->format_interface_name)
 785     hw->name = format (0, "%U", hw_class->format_interface_name,
 786                        dev_instance);
 787   else
 788     hw->name = format (0, "%s%x", hw_class->name, dev_instance);
 789
 790   if (!im->hw_interface_by_name)
 791     im->hw_interface_by_name = hash_create_vec ( /* size */ 0,
 792                                                 sizeof (hw->name[0]),
 793                                                 sizeof (uword));
 794
 795   hash_set_mem (im->hw_interface_by_name, hw->name, hw_index);
 796
 797   /* Make hardware interface point to software interface. */
 798   {
 799     vnet_sw_interface_t sw = {
 800       .type = VNET_SW_INTERFACE_TYPE_HARDWARE,
 801       .flood_class = VNET_FLOOD_CLASS_NORMAL,
 802       .hw_if_index = hw_index
 803     };
 804     hw->sw_if_index = vnet_create_sw_interface_no_callbacks (vnm, &sw);
 805   }
 806
 807   hw->dev_class_index = dev_class_index;
 808   hw->dev_instance = dev_instance;
 809   hw->hw_class_index = hw_class_index;
 810   hw->hw_instance = hw_instance;
 811
 812   hw->max_rate_bits_per_sec = 0;
 813   hw->min_packet_bytes = 0;
 814   vnet_sw_interface_set_mtu (vnm, hw->sw_if_index, 0);
 815
 816   if (dev_class->tx_function == 0)
 817     goto no_output_nodes;       /* No output/tx nodes to create */
 818
 819   tx_node_name = (char *) format (0, "%v-tx", hw->name);
 820   output_node_name = (char *) format (0, "%v-output", hw->name);
 821
 822   /* If we have previously deleted interface nodes, re-use them. */
 823   if (vec_len (im->deleted_hw_interface_nodes) > 0)
 824     {
 825       vnet_hw_interface_nodes_t *hn;
 826       vlib_node_t *node;
 827       vlib_node_runtime_t *nrt;
 828
 829       hn = vec_end (im->deleted_hw_interface_nodes) - 1;
 830
 831       hw->tx_node_index = hn->tx_node_index;
 832       hw->output_node_index = hn->output_node_index;
 833
 834       vlib_node_rename (vm, hw->tx_node_index, "%v", tx_node_name);
 835       vlib_node_rename (vm, hw->output_node_index, "%v", output_node_name);
 836
 837       /* *INDENT-OFF* */
 838       foreach_vlib_main ({
 839         vnet_interface_output_runtime_t *rt;
 840
 841         rt = vlib_node_get_runtime_data (this_vlib_main, hw->output_node_index);
 842         ASSERT (rt->is_deleted == 1);
 843         rt->is_deleted = 0;
 844         rt->hw_if_index = hw_index;
 845         rt->sw_if_index = hw->sw_if_index;
 846         rt->dev_instance = hw->dev_instance;
 847
 848         rt = vlib_node_get_runtime_data (this_vlib_main, hw->tx_node_index);
 849         rt->hw_if_index = hw_index;
 850         rt->sw_if_index = hw->sw_if_index;
 851         rt->dev_instance = hw->dev_instance;
 852       });
 853       /* *INDENT-ON* */
 854
 855       /* The new class may differ from the old one.
 856        * Functions have to be updated. */
 857       node = vlib_get_node (vm, hw->output_node_index);
 858       node->function = vnet_interface_output_node_multiarch_select ();
 859       node->format_trace = format_vnet_interface_output_trace;
 860       /* *INDENT-OFF* */
 861       foreach_vlib_main ({
 862         nrt = vlib_node_get_runtime (this_vlib_main, hw->output_node_index);
 863         nrt->function = node->function;
 864       });
 865       /* *INDENT-ON* */
 866
 867       node = vlib_get_node (vm, hw->tx_node_index);
 868       node->function = dev_class->tx_function;
 869       node->format_trace = dev_class->format_tx_trace;
 870       /* *INDENT-OFF* */
 871       foreach_vlib_main ({
 872         nrt = vlib_node_get_runtime (this_vlib_main, hw->tx_node_index);
 873         nrt->function = node->function;
 874       });
 875       /* *INDENT-ON* */
 876
 877       _vec_len (im->deleted_hw_interface_nodes) -= 1;
 878     }
 879   else
 880     {
 881       vlib_node_registration_t r;
 882       vnet_interface_output_runtime_t rt = {
 883         .hw_if_index = hw_index,
 884         .sw_if_index = hw->sw_if_index,
 885         .dev_instance = hw->dev_instance,
 886         .is_deleted = 0,
 887       };
 888
 889       memset (&r, 0, sizeof (r));
 890       r.type = VLIB_NODE_TYPE_INTERNAL;
 891       r.runtime_data = &rt;
 892       r.runtime_data_bytes = sizeof (rt);
 893       r.scalar_size = 0;
 894       r.vector_size = sizeof (u32);
 895
 896       r.flags = VLIB_NODE_FLAG_IS_OUTPUT;
 897       r.name = tx_node_name;
 898       r.function = dev_class->tx_function;
 899
 900       hw->tx_node_index = vlib_register_node (vm, &r);
 901
 902       vlib_node_add_named_next_with_slot (vm, hw->tx_node_index,
 903                                           "error-drop",
 904                                           VNET_INTERFACE_TX_NEXT_DROP);
 905
 906       r.flags = 0;
 907       r.name = output_node_name;
 908       r.function = vnet_interface_output_node_multiarch_select ();
 909       r.format_trace = format_vnet_interface_output_trace;
 910
 911       {
 912         static char *e[] = {
 913           "interface is down",
 914           "interface is deleted",
 915         };
 916
 917         r.n_errors = ARRAY_LEN (e);
 918         r.error_strings = e;
 919       }
 920       hw->output_node_index = vlib_register_node (vm, &r);
 921
 922       vlib_node_add_named_next_with_slot (vm, hw->output_node_index,
 923                                           "error-drop",
 924                                           VNET_INTERFACE_OUTPUT_NEXT_DROP);
 925       vlib_node_add_next_with_slot (vm, hw->output_node_index,
 926                                     hw->tx_node_index,
 927                                     VNET_INTERFACE_OUTPUT_NEXT_TX);
 928
 929       /* add interface to the list of "output-interface" feature arc start nodes
 930          and clone nexts from 1st interface if it exists */
 931       fcm = vnet_feature_get_config_main (im->output_feature_arc_index);
 932       cm = &fcm->config_main;
 933       i = vec_len (cm->start_node_indices);
 934       vec_validate (cm->start_node_indices, i);
 935       cm->start_node_indices[i] = hw->output_node_index;
 936       if (hw_index)
 937         {
 938           /* copy nexts from 1st interface */
 939           vnet_hw_interface_t *first_hw;
 940           vlib_node_t *first_node;
 941
 942           first_hw = vnet_get_hw_interface (vnm, /* hw_if_index */ 0);
 943           first_node = vlib_get_node (vm, first_hw->output_node_index);
 944
 945           /* 1st 2 nexts are already added above */
 946           for (i = 2; i < vec_len (first_node->next_nodes); i++)
 947             vlib_node_add_next_with_slot (vm, hw->output_node_index,
 948                                           first_node->next_nodes[i], i);
 949         }
 950     }
 951
 952   setup_output_node (vm, hw->output_node_index, hw_class);
 953   setup_tx_node (vm, hw->tx_node_index, dev_class);
 954
 955 no_output_nodes:
 956   /* Call all up/down callbacks with zero flags when interface is created. */
 957   vnet_sw_interface_set_flags_helper (vnm, hw->sw_if_index, /* flags */ 0,
 958                                       VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE);
 959   vnet_hw_interface_set_flags_helper (vnm, hw_index, /* flags */ 0,
 960                                       VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE);
 961   vec_free (tx_node_name);
 962   vec_free (output_node_name);
 963
 964   return hw_index;
 965 }
 966
 967 void
 968 vnet_delete_hw_interface (vnet_main_t * vnm, u32 hw_if_index)
 969 {
 970   vnet_interface_main_t *im = &vnm->interface_main;
 971   vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
 972   vlib_main_t *vm = vnm->vlib_main;
 973   vnet_device_class_t *dev_class = vnet_get_device_class (vnm,
 974                                                           hw->dev_class_index);
 975   /* If it is up, mark it down. */
 976   if (hw->flags != 0)
 977     vnet_hw_interface_set_flags (vnm, hw_if_index, /* flags */ 0);
 978
 979   /* Call delete callbacks. */
 980   call_hw_interface_add_del_callbacks (vnm, hw_if_index, /* is_create */ 0);
 981
 982   /* Delete any sub-interfaces. */
 983   {
 984     u32 id, sw_if_index;
 985     /* *INDENT-OFF* */
 986     hash_foreach (id, sw_if_index, hw->sub_interface_sw_if_index_by_id,
 987     ({
 988       vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
 989       u64 sup_and_sub_key =
 990         ((u64) (si->sup_sw_if_index) << 32) | (u64) si->sub.id;
 991       hash_unset_mem_free (&im->sw_if_index_by_sup_and_sub, &sup_and_sub_key);
 992       vnet_delete_sw_interface (vnm, sw_if_index);
 993     }));
 994     hash_free (hw->sub_interface_sw_if_index_by_id);
 995     /* *INDENT-ON* */
 996   }
 997
 998   /* Delete software interface corresponding to hardware interface. */
 999   vnet_delete_sw_interface (vnm, hw->sw_if_index);
1000
1001   if (dev_class->tx_function)
1002     {
1003       /* Put output/tx nodes into recycle pool */
1004       vnet_hw_interface_nodes_t *dn;
1005
1006       /* *INDENT-OFF* */
1007       foreach_vlib_main
1008         ({
1009           vnet_interface_output_runtime_t *rt =
1010             vlib_node_get_runtime_data (this_vlib_main, hw->output_node_index);
1011
1012           /* Mark node runtime as deleted so output node (if called)
1013            * will drop packets. */
1014           rt->is_deleted = 1;
1015         });
1016       /* *INDENT-ON* */
1017
1018       vlib_node_rename (vm, hw->output_node_index,
1019                         "interface-%d-output-deleted", hw_if_index);
1020       vlib_node_rename (vm, hw->tx_node_index, "interface-%d-tx-deleted",
1021                         hw_if_index);
1022       vec_add2 (im->deleted_hw_interface_nodes, dn, 1);
1023       dn->tx_node_index = hw->tx_node_index;
1024       dn->output_node_index = hw->output_node_index;
1025     }
1026
1027   hash_unset_mem (im->hw_interface_by_name, hw->name);
1028   vec_free (hw->name);
1029   vec_free (hw->hw_address);
1030   vec_free (hw->input_node_thread_index_by_queue);
1031   vec_free (hw->dq_runtime_index_by_queue);
1032
1033   pool_put (im->hw_interfaces, hw);
1034 }
1035
1036 void
1037 vnet_hw_interface_walk_sw (vnet_main_t * vnm,
1038                            u32 hw_if_index,
1039                            vnet_hw_sw_interface_walk_t fn, void *ctx)
1040 {
1041   vnet_hw_interface_t *hi;
1042   u32 id, sw_if_index;
1043
1044   hi = vnet_get_hw_interface (vnm, hw_if_index);
1045   /* the super first, then the and sub interfaces */
1046   fn (vnm, hi->sw_if_index, ctx);
1047
1048   /* *INDENT-OFF* */
1049   hash_foreach (id, sw_if_index,
1050                 hi->sub_interface_sw_if_index_by_id,
1051   ({
1052     if (WALK_STOP == fn (vnm, sw_if_index, ctx))
1053       break;
1054   }));
1055   /* *INDENT-ON* */
1056 }
1057
1058 void
1059 vnet_sw_interface_walk (vnet_main_t * vnm,
1060                         vnet_sw_interface_walk_t fn, void *ctx)
1061 {
1062   vnet_interface_main_t *im;
1063   vnet_sw_interface_t *si;
1064
1065   im = &vnm->interface_main;
1066
1067   /* *INDENT-OFF* */
1068   pool_foreach (si, im->sw_interfaces,
1069   {
1070     if (WALK_STOP == fn (vnm, si, ctx))
1071       break;
1072   });
1073   /* *INDENT-ON* */
1074 }
1075
1076 static void
1077 serialize_vnet_hw_interface_set_class (serialize_main_t * m, va_list * va)
1078 {
1079   u32 hw_if_index = va_arg (*va, u32);
1080   char *hw_class_name = va_arg (*va, char *);
1081   serialize_integer (m, hw_if_index, sizeof (hw_if_index));
1082   serialize_cstring (m, hw_class_name);
1083 }
1084
1085 static void
1086 unserialize_vnet_hw_interface_set_class (serialize_main_t * m, va_list * va)
1087 {
1088   CLIB_UNUSED (mc_main_t * mc) = va_arg (*va, mc_main_t *);
1089   vnet_main_t *vnm = vnet_get_main ();
1090   u32 hw_if_index;
1091   char *hw_class_name;
1092   uword *p;
1093   clib_error_t *error;
1094
1095   unserialize_integer (m, &hw_if_index, sizeof (hw_if_index));
1096   unserialize_cstring (m, &hw_class_name);
1097   p =
1098     hash_get (vnm->interface_main.hw_interface_class_by_name, hw_class_name);
1099   ASSERT (p != 0);
1100   error = vnet_hw_interface_set_class_helper (vnm, hw_if_index, p[0],
1101                                               /* redistribute */ 0);
1102   if (error)
1103     clib_error_report (error);
1104 }
1105
1106 MC_SERIALIZE_MSG (vnet_hw_interface_set_class_msg, static) =
1107 {
1108 .name = "vnet_hw_interface_set_class",.serialize =
1109     serialize_vnet_hw_interface_set_class,.unserialize =
1110     unserialize_vnet_hw_interface_set_class,};
1111
1112 void
1113 vnet_hw_interface_init_for_class (vnet_main_t * vnm, u32 hw_if_index,
1114                                   u32 hw_class_index, u32 hw_instance)
1115 {
1116   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1117   vnet_hw_interface_class_t *hc =
1118     vnet_get_hw_interface_class (vnm, hw_class_index);
1119
1120   hi->hw_class_index = hw_class_index;
1121   hi->hw_instance = hw_instance;
1122   setup_output_node (vnm->vlib_main, hi->output_node_index, hc);
1123 }
1124
1125 static clib_error_t *
1126 vnet_hw_interface_set_class_helper (vnet_main_t * vnm, u32 hw_if_index,
1127                                     u32 hw_class_index, u32 redistribute)
1128 {
1129   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1130   vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, hi->sw_if_index);
1131   vnet_hw_interface_class_t *old_class =
1132     vnet_get_hw_interface_class (vnm, hi->hw_class_index);
1133   vnet_hw_interface_class_t *new_class =
1134     vnet_get_hw_interface_class (vnm, hw_class_index);
1135   vnet_device_class_t *dev_class =
1136     vnet_get_device_class (vnm, hi->dev_class_index);
1137   clib_error_t *error = 0;
1138
1139   /* New class equals old class?  Nothing to do. */
1140   if (hi->hw_class_index == hw_class_index)
1141     return 0;
1142
1143   /* No need (and incorrect since admin up flag may be set) to do error checking when
1144      receiving unserialize message. */
1145   if (redistribute)
1146     {
1147       if (si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
1148         return clib_error_return (0,
1149                                   "%v must be admin down to change class from %s to %s",
1150                                   hi->name, old_class->name, new_class->name);
1151
1152       /* Make sure interface supports given class. */
1153       if ((new_class->is_valid_class_for_interface
1154            && !new_class->is_valid_class_for_interface (vnm, hw_if_index,
1155                                                         hw_class_index))
1156           || (dev_class->is_valid_class_for_interface
1157               && !dev_class->is_valid_class_for_interface (vnm, hw_if_index,
1158                                                            hw_class_index)))
1159         return clib_error_return (0,
1160                                   "%v class cannot be changed from %s to %s",
1161                                   hi->name, old_class->name, new_class->name);
1162
1163       if (vnm->vlib_main->mc_main)
1164         {
1165           mc_serialize (vnm->vlib_main->mc_main,
1166                         &vnet_hw_interface_set_class_msg, hw_if_index,
1167                         new_class->name);
1168           return 0;
1169         }
1170     }
1171
1172   if (old_class->hw_class_change)
1173     old_class->hw_class_change (vnm, hw_if_index, old_class->index,
1174                                 new_class->index);
1175
1176   vnet_hw_interface_init_for_class (vnm, hw_if_index, new_class->index,
1177                                     /* instance */ ~0);
1178
1179   if (new_class->hw_class_change)
1180     new_class->hw_class_change (vnm, hw_if_index, old_class->index,
1181                                 new_class->index);
1182
1183   if (dev_class->hw_class_change)
1184     dev_class->hw_class_change (vnm, hw_if_index, new_class->index);
1185
1186   return error;
1187 }
1188
1189 clib_error_t *
1190 vnet_hw_interface_set_class (vnet_main_t * vnm, u32 hw_if_index,
1191                              u32 hw_class_index)
1192 {
1193   return vnet_hw_interface_set_class_helper (vnm, hw_if_index, hw_class_index,
1194                                              /* redistribute */ 1);
1195 }
1196
1197 static int
1198 vnet_hw_interface_rx_redirect_to_node_helper (vnet_main_t * vnm,
1199                                               u32 hw_if_index,
1200                                               u32 node_index,
1201                                               u32 redistribute)
1202 {
1203   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1204   vnet_device_class_t *dev_class = vnet_get_device_class
1205     (vnm, hi->dev_class_index);
1206
1207   if (redistribute)
1208     {
1209       /* $$$$ fixme someday maybe */
1210       ASSERT (vnm->vlib_main->mc_main == 0);
1211     }
1212   if (dev_class->rx_redirect_to_node)
1213     {
1214       dev_class->rx_redirect_to_node (vnm, hw_if_index, node_index);
1215       return 0;
1216     }
1217
1218   return VNET_API_ERROR_UNIMPLEMENTED;
1219 }
1220
1221 int
1222 vnet_hw_interface_rx_redirect_to_node (vnet_main_t * vnm, u32 hw_if_index,
1223                                        u32 node_index)
1224 {
1225   return vnet_hw_interface_rx_redirect_to_node_helper (vnm, hw_if_index,
1226                                                        node_index,
1227                                                        1 /* redistribute */ );
1228 }
1229
1230 word
1231 vnet_sw_interface_compare (vnet_main_t * vnm,
1232                            uword sw_if_index0, uword sw_if_index1)
1233 {
1234   vnet_sw_interface_t *sup0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1235   vnet_sw_interface_t *sup1 = vnet_get_sup_sw_interface (vnm, sw_if_index1);
1236   vnet_hw_interface_t *h0 = vnet_get_hw_interface (vnm, sup0->hw_if_index);
1237   vnet_hw_interface_t *h1 = vnet_get_hw_interface (vnm, sup1->hw_if_index);
1238
1239   if (h0 != h1)
1240     return vec_cmp (h0->name, h1->name);
1241   return (word) h0->hw_instance - (word) h1->hw_instance;
1242 }
1243
1244 word
1245 vnet_hw_interface_compare (vnet_main_t * vnm,
1246                            uword hw_if_index0, uword hw_if_index1)
1247 {
1248   vnet_hw_interface_t *h0 = vnet_get_hw_interface (vnm, hw_if_index0);
1249   vnet_hw_interface_t *h1 = vnet_get_hw_interface (vnm, hw_if_index1);
1250
1251   if (h0 != h1)
1252     return vec_cmp (h0->name, h1->name);
1253   return (word) h0->hw_instance - (word) h1->hw_instance;
1254 }
1255
1256 int
1257 vnet_sw_interface_is_p2p (vnet_main_t * vnm, u32 sw_if_index)
1258 {
1259   vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
1260   if (si->type == VNET_SW_INTERFACE_TYPE_P2P)
1261     return 1;
1262
1263   vnet_hw_interface_t *hw = vnet_get_sup_hw_interface (vnm, sw_if_index);
1264   vnet_hw_interface_class_t *hc =
1265     vnet_get_hw_interface_class (vnm, hw->hw_class_index);
1266
1267   return (hc->flags & VNET_HW_INTERFACE_CLASS_FLAG_P2P);
1268 }
1269
1270 clib_error_t *
1271 vnet_interface_init (vlib_main_t * vm)
1272 {
1273   vnet_main_t *vnm = vnet_get_main ();
1274   vnet_interface_main_t *im = &vnm->interface_main;
1275   vlib_buffer_t *b = 0;
1276   vnet_buffer_opaque_t *o = 0;
1277   clib_error_t *error;
1278
1279   /*
1280    * Keep people from shooting themselves in the foot.
1281    */
1282   if (sizeof (b->opaque) != sizeof (vnet_buffer_opaque_t))
1283     {
1284 #define _(a) if (sizeof(o->a) > sizeof (o->unused))                     \
1285       clib_warning                                                      \
1286         ("FATAL: size of opaque union subtype %s is %d (max %d)",       \
1287          #a, sizeof(o->a), sizeof (o->unused));
1288       foreach_buffer_opaque_union_subtype;
1289 #undef _
1290
1291       return clib_error_return
1292         (0, "FATAL: size of vlib buffer opaque %d, size of vnet opaque %d",
1293          sizeof (b->opaque), sizeof (vnet_buffer_opaque_t));
1294     }
1295
1296   im->sw_if_counter_lock = clib_mem_alloc_aligned (CLIB_CACHE_LINE_BYTES,
1297                                                    CLIB_CACHE_LINE_BYTES);
1298   im->sw_if_counter_lock[0] = 1;        /* should be no need */
1299
1300   /*
1301    * $$$$ add stat segment name(s) if desired
1302    * set xxx.stat_segment_name = "whatever"...
1303    */
1304   vec_validate (im->sw_if_counters, VNET_N_SIMPLE_INTERFACE_COUNTER - 1);
1305   im->sw_if_counters[VNET_INTERFACE_COUNTER_DROP].name = "drops";
1306   im->sw_if_counters[VNET_INTERFACE_COUNTER_PUNT].name = "punts";
1307   im->sw_if_counters[VNET_INTERFACE_COUNTER_IP4].name = "ip4";
1308   im->sw_if_counters[VNET_INTERFACE_COUNTER_IP6].name = "ip6";
1309   im->sw_if_counters[VNET_INTERFACE_COUNTER_RX_NO_BUF].name = "rx-no-buf";
1310   im->sw_if_counters[VNET_INTERFACE_COUNTER_RX_MISS].name = "rx-miss";
1311   im->sw_if_counters[VNET_INTERFACE_COUNTER_RX_ERROR].name = "rx-error";
1312   im->sw_if_counters[VNET_INTERFACE_COUNTER_TX_ERROR].name = "tx-error";
1313
1314   vec_validate (im->combined_sw_if_counters,
1315                 VNET_N_COMBINED_INTERFACE_COUNTER - 1);
1316   im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_RX].name = "rx";
1317   im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_RX_UNICAST].name =
1318     "rx-unicast";
1319   im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_RX_MULTICAST].name =
1320     "rx-multicast";
1321   im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_RX_BROADCAST].name =
1322     "rx-broadcast";
1323   im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_TX].name = "tx";
1324   im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_TX_UNICAST].name =
1325     "tx-unicast";
1326   im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_TX_MULTICAST].name =
1327     "tx-multicast";
1328   im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_TX_BROADCAST].name =
1329     "tx-broadcast";
1330
1331   im->sw_if_counter_lock[0] = 0;
1332
1333   im->device_class_by_name = hash_create_string ( /* size */ 0,
1334                                                  sizeof (uword));
1335   {
1336     vnet_device_class_t *c;
1337
1338     c = vnm->device_class_registrations;
1339
1340     while (c)
1341       {
1342         c->index = vec_len (im->device_classes);
1343         hash_set_mem (im->device_class_by_name, c->name, c->index);
1344         vec_add1 (im->device_classes, c[0]);
1345         c = c->next_class_registration;
1346       }
1347   }
1348
1349   im->hw_interface_class_by_name = hash_create_string ( /* size */ 0,
1350                                                        sizeof (uword));
1351
1352   im->sw_if_index_by_sup_and_sub = hash_create_mem (0, sizeof (u64),
1353                                                     sizeof (uword));
1354   {
1355     vnet_hw_interface_class_t *c;
1356
1357     c = vnm->hw_interface_class_registrations;
1358
1359     while (c)
1360       {
1361         c->index = vec_len (im->hw_interface_classes);
1362         hash_set_mem (im->hw_interface_class_by_name, c->name, c->index);
1363
1364         if (NULL == c->build_rewrite)
1365           c->build_rewrite = default_build_rewrite;
1366         if (NULL == c->update_adjacency)
1367           c->update_adjacency = default_update_adjacency;
1368
1369         vec_add1 (im->hw_interface_classes, c[0]);
1370         c = c->next_class_registration;
1371       }
1372   }
1373
1374   if ((error = vlib_call_init_function (vm, vnet_interface_cli_init)))
1375     return error;
1376
1377   vnm->interface_tag_by_sw_if_index = hash_create (0, sizeof (uword));
1378
1379 #if VLIB_BUFFER_TRACE_TRAJECTORY > 0
1380   if ((error = vlib_call_init_function (vm, trajectory_trace_init)))
1381     return error;
1382 #endif
1383
1384   return 0;
1385 }
1386
1387 VLIB_INIT_FUNCTION (vnet_interface_init);
1388
1389 /* Kludge to renumber interface names [only!] */
1390 int
1391 vnet_interface_name_renumber (u32 sw_if_index, u32 new_show_dev_instance)
1392 {
1393   int rv;
1394   vnet_main_t *vnm = vnet_get_main ();
1395   vnet_interface_main_t *im = &vnm->interface_main;
1396   vnet_hw_interface_t *hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
1397
1398   vnet_device_class_t *dev_class = vnet_get_device_class
1399     (vnm, hi->dev_class_index);
1400
1401   if (dev_class->name_renumber == 0 || dev_class->format_device_name == 0)
1402     return VNET_API_ERROR_UNIMPLEMENTED;
1403
1404   rv = dev_class->name_renumber (hi, new_show_dev_instance);
1405
1406   if (rv)
1407     return rv;
1408
1409   hash_unset_mem (im->hw_interface_by_name, hi->name);
1410   vec_free (hi->name);
1411   /* Use the mapping we set up to call it Ishmael */
1412   hi->name = format (0, "%U", dev_class->format_device_name,
1413                      hi->dev_instance);
1414
1415   hash_set_mem (im->hw_interface_by_name, hi->name, hi->hw_if_index);
1416   return rv;
1417 }
1418
1419 clib_error_t *
1420 vnet_rename_interface (vnet_main_t * vnm, u32 hw_if_index, char *new_name)
1421 {
1422   vnet_interface_main_t *im = &vnm->interface_main;
1423   vlib_main_t *vm = vnm->vlib_main;
1424   vnet_hw_interface_t *hw;
1425   u8 *old_name;
1426   clib_error_t *error = 0;
1427
1428   hw = vnet_get_hw_interface (vnm, hw_if_index);
1429   if (!hw)
1430     {
1431       return clib_error_return (0,
1432                                 "unable to find hw interface for index %u",
1433                                 hw_if_index);
1434     }
1435
1436   old_name = hw->name;
1437
1438   /* set new hw->name */
1439   hw->name = format (0, "%s", new_name);
1440
1441   /* remove the old name to hw_if_index mapping and install the new one */
1442   hash_unset_mem (im->hw_interface_by_name, old_name);
1443   hash_set_mem (im->hw_interface_by_name, hw->name, hw_if_index);
1444
1445   /* rename tx/output nodes */
1446   vlib_node_rename (vm, hw->tx_node_index, "%v-tx", hw->name);
1447   vlib_node_rename (vm, hw->output_node_index, "%v-output", hw->name);
1448
1449   /* free the old name vector */
1450   vec_free (old_name);
1451
1452   return error;
1453 }
1454
1455 static clib_error_t *
1456 vnet_hw_interface_change_mac_address_helper (vnet_main_t * vnm,
1457                                              u32 hw_if_index,
1458                                              u8 * mac_address)
1459 {
1460   clib_error_t *error = 0;
1461   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1462
1463   if (hi->hw_address)
1464     {
1465       vnet_device_class_t *dev_class =
1466         vnet_get_device_class (vnm, hi->dev_class_index);
1467       if (dev_class->mac_addr_change_function)
1468         {
1469           error =
1470             dev_class->mac_addr_change_function (hi, (char *) mac_address);
1471         }
1472       if (!error)
1473         {
1474           vnet_hw_interface_class_t *hw_class;
1475
1476           hw_class = vnet_get_hw_interface_class (vnm, hi->hw_class_index);
1477
1478           if (NULL != hw_class->mac_addr_change_function)
1479             hw_class->mac_addr_change_function (hi, (char *) mac_address);
1480         }
1481       else
1482         {
1483           error =
1484             clib_error_return (0,
1485                                "MAC Address Change is not supported on this interface");
1486         }
1487     }
1488   else
1489     {
1490       error =
1491         clib_error_return (0,
1492                            "mac address change is not supported for interface index %u",
1493                            hw_if_index);
1494     }
1495   return error;
1496 }
1497
1498 clib_error_t *
1499 vnet_hw_interface_change_mac_address (vnet_main_t * vnm, u32 hw_if_index,
1500                                       u8 * mac_address)
1501 {
1502   return vnet_hw_interface_change_mac_address_helper
1503     (vnm, hw_if_index, mac_address);
1504 }
1505
1506 /* update the unnumbered state of an interface*/
1507 void
1508 vnet_sw_interface_update_unnumbered (u32 unnumbered_sw_if_index,
1509                                      u32 ip_sw_if_index, u8 enable)
1510 {
1511   vnet_main_t *vnm = vnet_get_main ();
1512   vnet_sw_interface_t *si;
1513   u32 was_unnum;
1514
1515   si = vnet_get_sw_interface (vnm, unnumbered_sw_if_index);
1516   was_unnum = (si->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED);
1517
1518   if (enable)
1519     {
1520       si->flags |= VNET_SW_INTERFACE_FLAG_UNNUMBERED;
1521       si->unnumbered_sw_if_index = ip_sw_if_index;
1522
1523       ip4_main.lookup_main.if_address_pool_index_by_sw_if_index
1524         [unnumbered_sw_if_index] =
1525         ip4_main.
1526         lookup_main.if_address_pool_index_by_sw_if_index[ip_sw_if_index];
1527       ip6_main.
1528         lookup_main.if_address_pool_index_by_sw_if_index
1529         [unnumbered_sw_if_index] =
1530         ip6_main.
1531         lookup_main.if_address_pool_index_by_sw_if_index[ip_sw_if_index];
1532     }
1533   else
1534     {
1535       si->flags &= ~(VNET_SW_INTERFACE_FLAG_UNNUMBERED);
1536       si->unnumbered_sw_if_index = (u32) ~ 0;
1537
1538       ip4_main.lookup_main.if_address_pool_index_by_sw_if_index
1539         [unnumbered_sw_if_index] = ~0;
1540       ip6_main.lookup_main.if_address_pool_index_by_sw_if_index
1541         [unnumbered_sw_if_index] = ~0;
1542     }
1543
1544   if (was_unnum != (si->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED))
1545     {
1546       ip4_sw_interface_enable_disable (unnumbered_sw_if_index, enable);
1547       ip6_sw_interface_enable_disable (unnumbered_sw_if_index, enable);
1548     }
1549 }
1550
1551 vnet_l3_packet_type_t
1552 vnet_link_to_l3_proto (vnet_link_t link)
1553 {
1554   switch (link)
1555     {
1556     case VNET_LINK_IP4:
1557       return (VNET_L3_PACKET_TYPE_IP4);
1558     case VNET_LINK_IP6:
1559       return (VNET_L3_PACKET_TYPE_IP6);
1560     case VNET_LINK_MPLS:
1561       return (VNET_L3_PACKET_TYPE_MPLS);
1562     case VNET_LINK_ARP:
1563       return (VNET_L3_PACKET_TYPE_ARP);
1564     case VNET_LINK_ETHERNET:
1565     case VNET_LINK_NSH:
1566       ASSERT (0);
1567       break;
1568     }
1569   ASSERT (0);
1570   return (0);
1571 }
1572
1573 vnet_mtu_t
1574 vnet_link_to_mtu (vnet_link_t link)
1575 {
1576   switch (link)
1577     {
1578     case VNET_LINK_IP4:
1579       return (VNET_MTU_IP4);
1580     case VNET_LINK_IP6:
1581       return (VNET_MTU_IP6);
1582     case VNET_LINK_MPLS:
1583       return (VNET_MTU_MPLS);
1584     default:
1585       return (VNET_MTU_L3);
1586     }
1587 }
1588
1589 u8 *
1590 default_build_rewrite (vnet_main_t * vnm,
1591                        u32 sw_if_index,
1592                        vnet_link_t link_type, const void *dst_address)
1593 {
1594   return (NULL);
1595 }
1596
1597 void
1598 default_update_adjacency (vnet_main_t * vnm, u32 sw_if_index, u32 ai)
1599 {
1600   ip_adjacency_t *adj;
1601
1602   adj = adj_get (ai);
1603
1604   switch (adj->lookup_next_index)
1605     {
1606     case IP_LOOKUP_NEXT_GLEAN:
1607       adj_glean_update_rewrite (ai);
1608       break;
1609     case IP_LOOKUP_NEXT_ARP:
1610       /*
1611        * default rewirte in neighbour adj
1612        */
1613       adj_nbr_update_rewrite
1614         (ai,
1615          ADJ_NBR_REWRITE_FLAG_COMPLETE,
1616          vnet_build_rewrite_for_sw_interface (vnm,
1617                                               sw_if_index,
1618                                               adj_get_link_type (ai), NULL));
1619       break;
1620     case IP_LOOKUP_NEXT_MCAST:
1621       /*
1622        * mcast traffic also uses default rewrite string with no mcast
1623        * switch time updates.
1624        */
1625       adj_mcast_update_rewrite
1626         (ai,
1627          vnet_build_rewrite_for_sw_interface (vnm,
1628                                               sw_if_index,
1629                                               adj_get_link_type (ai),
1630                                               NULL), 0);
1631       break;
1632     case IP_LOOKUP_NEXT_DROP:
1633     case IP_LOOKUP_NEXT_PUNT:
1634     case IP_LOOKUP_NEXT_LOCAL:
1635     case IP_LOOKUP_NEXT_REWRITE:
1636     case IP_LOOKUP_NEXT_MCAST_MIDCHAIN:
1637     case IP_LOOKUP_NEXT_MIDCHAIN:
1638     case IP_LOOKUP_NEXT_ICMP_ERROR:
1639     case IP_LOOKUP_N_NEXT:
1640       ASSERT (0);
1641       break;
1642     }
1643 }
1644
1645 int collect_detailed_interface_stats_flag = 0;
1646
1647 void
1648 collect_detailed_interface_stats_flag_set (void)
1649 {
1650   collect_detailed_interface_stats_flag = 1;
1651 }
1652
1653 void
1654 collect_detailed_interface_stats_flag_clear (void)
1655 {
1656   collect_detailed_interface_stats_flag = 0;
1657 }
1658
1659 static clib_error_t *
1660 collect_detailed_interface_stats_cli (vlib_main_t * vm,
1661                                       unformat_input_t * input,
1662                                       vlib_cli_command_t * cmd)
1663 {
1664   unformat_input_t _line_input, *line_input = &_line_input;
1665   clib_error_t *error = NULL;
1666
1667   /* Get a line of input. */
1668   if (!unformat_user (input, unformat_line_input, line_input))
1669     return clib_error_return (0, "expected enable | disable");
1670
1671   while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
1672     {
1673       if (unformat (line_input, "enable") || unformat (line_input, "on"))
1674         collect_detailed_interface_stats_flag_set ();
1675       else if (unformat (line_input, "disable")
1676                || unformat (line_input, "off"))
1677         collect_detailed_interface_stats_flag_clear ();
1678       else
1679         {
1680           error = clib_error_return (0, "unknown input `%U'",
1681                                      format_unformat_error, line_input);
1682           goto done;
1683         }
1684     }
1685
1686 done:
1687   unformat_free (line_input);
1688   return error;
1689 }
1690
1691 /* *INDENT-OFF* */
1692 VLIB_CLI_COMMAND (collect_detailed_interface_stats_command, static) = {
1693   .path = "interface collect detailed-stats",
1694   .short_help = "interface collect detailed-stats <enable|disable>",
1695   .function = collect_detailed_interface_stats_cli,
1696 };
1697 /* *INDENT-ON* */
1698
1699 /*
1700  * fd.io coding-style-patch-verification: ON
1701  *
1702  * Local Variables:
1703  * eval: (c-set-style "gnu")
1704  * End:
1705  */