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 #define VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE (1 << 0)
 291 #define VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE (1 << 1)
 292
 293 static clib_error_t *
 294 vnet_hw_interface_set_flags_helper (vnet_main_t * vnm, u32 hw_if_index,
 295                                     vnet_hw_interface_flags_t flags,
 296                                     vnet_interface_helper_flags_t
 297                                     helper_flags)
 298 {
 299   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
 300   vnet_hw_interface_class_t *hw_class =
 301     vnet_get_hw_interface_class (vnm, hi->hw_class_index);
 302   u32 mask;
 303   clib_error_t *error = 0;
 304   u32 is_create =
 305     (helper_flags & VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE) != 0;
 306
 307   mask =
 308     (VNET_HW_INTERFACE_FLAG_LINK_UP | VNET_HW_INTERFACE_FLAG_DUPLEX_MASK |
 309      VNET_HW_INTERFACE_FLAG_SPEED_MASK);
 310   flags &= mask;
 311
 312   /* Call hardware interface add/del callbacks. */
 313   if (is_create)
 314     call_hw_interface_add_del_callbacks (vnm, hw_if_index, is_create);
 315
 316   /* Already in the desired state? */
 317   if (!is_create && (hi->flags & mask) == flags)
 318     goto done;
 319
 320   if ((hi->flags & VNET_HW_INTERFACE_FLAG_LINK_UP) !=
 321       (flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
 322     {
 323       /* Do hardware class (e.g. ethernet). */
 324       if (hw_class->link_up_down_function
 325           && (error = hw_class->link_up_down_function (vnm, hw_if_index,
 326                                                        flags)))
 327         goto done;
 328
 329       error = call_elf_section_interface_callbacks
 330         (vnm, hw_if_index, flags, vnm->hw_interface_link_up_down_functions);
 331
 332       if (error)
 333         goto done;
 334     }
 335
 336   hi->flags &= ~mask;
 337   hi->flags |= flags;
 338
 339 done:
 340   return error;
 341 }
 342
 343 static clib_error_t *
 344 vnet_sw_interface_set_flags_helper (vnet_main_t * vnm, u32 sw_if_index,
 345                                     vnet_sw_interface_flags_t flags,
 346                                     vnet_interface_helper_flags_t
 347                                     helper_flags)
 348 {
 349   vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
 350   u32 mask;
 351   clib_error_t *error = 0;
 352   u32 is_create =
 353     (helper_flags & VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE) != 0;
 354   u32 old_flags;
 355
 356   mask = VNET_SW_INTERFACE_FLAG_ADMIN_UP | VNET_SW_INTERFACE_FLAG_PUNT;
 357   flags &= mask;
 358
 359   if (is_create)
 360     {
 361       error =
 362         call_sw_interface_add_del_callbacks (vnm, sw_if_index, is_create);
 363       if (error)
 364         goto done;
 365
 366       if (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
 367         {
 368           /* Notify everyone when the interface is created as admin up */
 369           error = call_elf_section_interface_callbacks (vnm, sw_if_index,
 370                                                         flags,
 371                                                         vnm->
 372                                                         sw_interface_admin_up_down_functions);
 373           if (error)
 374             goto done;
 375         }
 376     }
 377   else
 378     {
 379       vnet_sw_interface_t *si_sup = si;
 380
 381       /* Check that super interface is in correct state. */
 382       if (si->type == VNET_SW_INTERFACE_TYPE_SUB)
 383         {
 384           si_sup = vnet_get_sw_interface (vnm, si->sup_sw_if_index);
 385
 386           /* Check to see if we're bringing down the soft interface and if it's parent is up */
 387           if ((flags != (si_sup->flags & mask)) &&
 388               (!((flags == 0)
 389                  && ((si_sup->flags & mask) ==
 390                      VNET_SW_INTERFACE_FLAG_ADMIN_UP))))
 391             {
 392               error = clib_error_return (0, "super-interface %U must be %U",
 393                                          format_vnet_sw_interface_name, vnm,
 394                                          si_sup,
 395                                          format_vnet_sw_interface_flags,
 396                                          flags);
 397               goto done;
 398             }
 399         }
 400
 401       /* Do not change state for slave link of bonded interfaces */
 402       if (si->flags & VNET_SW_INTERFACE_FLAG_BOND_SLAVE)
 403         {
 404           error = clib_error_return
 405             (0, "not allowed as %U belong to a BondEthernet interface",
 406              format_vnet_sw_interface_name, vnm, si);
 407           goto done;
 408         }
 409
 410       /* Already in the desired state? */
 411       if ((si->flags & mask) == flags)
 412         goto done;
 413
 414       /* Sub-interfaces of hardware interfaces that do no redistribute,
 415          do not redistribute themselves. */
 416       if (si_sup->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
 417         {
 418           vnet_hw_interface_t *hi =
 419             vnet_get_hw_interface (vnm, si_sup->hw_if_index);
 420           vnet_device_class_t *dev_class =
 421             vnet_get_device_class (vnm, hi->dev_class_index);
 422           if (!dev_class->redistribute)
 423             helper_flags &=
 424               ~VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE;
 425         }
 426
 427       /* set the flags now before invoking the registered clients
 428        * so that the state they query is consistent with the state here notified */
 429       old_flags = si->flags;
 430       si->flags &= ~mask;
 431       si->flags |= flags;
 432       if ((flags | old_flags) & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
 433         error = call_elf_section_interface_callbacks
 434           (vnm, sw_if_index, flags,
 435            vnm->sw_interface_admin_up_down_functions);
 436
 437       if (error)
 438         {
 439           /* restore flags on error */
 440           si->flags = old_flags;
 441           goto done;
 442         }
 443
 444       if (si->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
 445         {
 446           vnet_hw_interface_t *hi =
 447             vnet_get_hw_interface (vnm, si->hw_if_index);
 448           vnet_hw_interface_class_t *hw_class =
 449             vnet_get_hw_interface_class (vnm, hi->hw_class_index);
 450           vnet_device_class_t *dev_class =
 451             vnet_get_device_class (vnm, hi->dev_class_index);
 452
 453           if ((flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) &&
 454               (si->flags & VNET_SW_INTERFACE_FLAG_ERROR))
 455             {
 456               error = clib_error_return (0, "Interface in the error state");
 457               goto done;
 458             }
 459
 460           /* save the si admin up flag */
 461           old_flags = si->flags;
 462
 463           /* update si admin up flag in advance if we are going admin down */
 464           if (!(flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
 465             si->flags &= ~VNET_SW_INTERFACE_FLAG_ADMIN_UP;
 466
 467           if (dev_class->admin_up_down_function
 468               && (error = dev_class->admin_up_down_function (vnm,
 469                                                              si->hw_if_index,
 470                                                              flags)))
 471             {
 472               /* restore si admin up flag to it's original state on errors */
 473               si->flags = old_flags;
 474               goto done;
 475             }
 476
 477           if (hw_class->admin_up_down_function
 478               && (error = hw_class->admin_up_down_function (vnm,
 479                                                             si->hw_if_index,
 480                                                             flags)))
 481             {
 482               /* restore si admin up flag to it's original state on errors */
 483               si->flags = old_flags;
 484               goto done;
 485             }
 486
 487           /* Admin down implies link down. */
 488           if (!(flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
 489               && (hi->flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
 490             vnet_hw_interface_set_flags_helper (vnm, si->hw_if_index,
 491                                                 hi->flags &
 492                                                 ~VNET_HW_INTERFACE_FLAG_LINK_UP,
 493                                                 helper_flags);
 494         }
 495     }
 496
 497   si->flags &= ~mask;
 498   si->flags |= flags;
 499
 500 done:
 501   return error;
 502 }
 503
 504 clib_error_t *
 505 vnet_hw_interface_set_flags (vnet_main_t * vnm, u32 hw_if_index,
 506                              vnet_hw_interface_flags_t flags)
 507 {
 508   return vnet_hw_interface_set_flags_helper
 509     (vnm, hw_if_index, flags,
 510      VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE);
 511 }
 512
 513 clib_error_t *
 514 vnet_sw_interface_set_flags (vnet_main_t * vnm, u32 sw_if_index,
 515                              vnet_sw_interface_flags_t flags)
 516 {
 517   return vnet_sw_interface_set_flags_helper
 518     (vnm, sw_if_index, flags,
 519      VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE);
 520 }
 521
 522 static u32
 523 vnet_create_sw_interface_no_callbacks (vnet_main_t * vnm,
 524                                        vnet_sw_interface_t * template)
 525 {
 526   vnet_interface_main_t *im = &vnm->interface_main;
 527   vnet_sw_interface_t *sw;
 528   u32 sw_if_index;
 529
 530   pool_get (im->sw_interfaces, sw);
 531   sw_if_index = sw - im->sw_interfaces;
 532
 533   sw[0] = template[0];
 534
 535   sw->flags = 0;
 536   sw->sw_if_index = sw_if_index;
 537   if (sw->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
 538     sw->sup_sw_if_index = sw->sw_if_index;
 539
 540   /* Allocate counters for this interface. */
 541   {
 542     u32 i;
 543
 544     vnet_interface_counter_lock (im);
 545
 546     for (i = 0; i < vec_len (im->sw_if_counters); i++)
 547       {
 548         vlib_validate_simple_counter (&im->sw_if_counters[i], sw_if_index);
 549         vlib_zero_simple_counter (&im->sw_if_counters[i], sw_if_index);
 550       }
 551
 552     for (i = 0; i < vec_len (im->combined_sw_if_counters); i++)
 553       {
 554         vlib_validate_combined_counter (&im->combined_sw_if_counters[i],
 555                                         sw_if_index);
 556         vlib_zero_combined_counter (&im->combined_sw_if_counters[i],
 557                                     sw_if_index);
 558       }
 559
 560     vnet_interface_counter_unlock (im);
 561   }
 562
 563   return sw_if_index;
 564 }
 565
 566 clib_error_t *
 567 vnet_create_sw_interface (vnet_main_t * vnm, vnet_sw_interface_t * template,
 568                           u32 * sw_if_index)
 569 {
 570   clib_error_t *error;
 571   vnet_hw_interface_t *hi;
 572   vnet_device_class_t *dev_class;
 573
 574   hi = vnet_get_sup_hw_interface (vnm, template->sup_sw_if_index);
 575   dev_class = vnet_get_device_class (vnm, hi->dev_class_index);
 576
 577   if (template->type == VNET_SW_INTERFACE_TYPE_SUB &&
 578       dev_class->subif_add_del_function)
 579     {
 580       error = dev_class->subif_add_del_function (vnm, hi->hw_if_index,
 581                                                  (struct vnet_sw_interface_t
 582                                                   *) template, 1);
 583       if (error)
 584         return error;
 585     }
 586
 587   *sw_if_index = vnet_create_sw_interface_no_callbacks (vnm, template);
 588   error = vnet_sw_interface_set_flags_helper
 589     (vnm, *sw_if_index, template->flags,
 590      VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE);
 591
 592   if (error)
 593     {
 594       /* undo the work done by vnet_create_sw_interface_no_callbacks() */
 595       vnet_interface_main_t *im = &vnm->interface_main;
 596       vnet_sw_interface_t *sw =
 597         pool_elt_at_index (im->sw_interfaces, *sw_if_index);
 598       pool_put (im->sw_interfaces, sw);
 599     }
 600
 601   return error;
 602 }
 603
 604 void
 605 vnet_delete_sw_interface (vnet_main_t * vnm, u32 sw_if_index)
 606 {
 607   vnet_interface_main_t *im = &vnm->interface_main;
 608   vnet_sw_interface_t *sw =
 609     pool_elt_at_index (im->sw_interfaces, sw_if_index);
 610
 611   /* Check if the interface has config and is removed from L2 BD or XConnect */
 612   vlib_main_t *vm = vlib_get_main ();
 613   l2_input_config_t *config;
 614   if (sw_if_index < vec_len (l2input_main.configs))
 615     {
 616       config = vec_elt_at_index (l2input_main.configs, sw_if_index);
 617       if (config->xconnect)
 618         set_int_l2_mode (vm, vnm, MODE_L3, config->output_sw_if_index, 0,
 619                          L2_BD_PORT_TYPE_NORMAL, 0, 0);
 620       if (config->xconnect || config->bridge)
 621         set_int_l2_mode (vm, vnm, MODE_L3, sw_if_index, 0,
 622                          L2_BD_PORT_TYPE_NORMAL, 0, 0);
 623     }
 624   vnet_clear_sw_interface_tag (vnm, sw_if_index);
 625
 626   /* Bring down interface in case it is up. */
 627   if (sw->flags != 0)
 628     vnet_sw_interface_set_flags (vnm, sw_if_index, /* flags */ 0);
 629
 630   call_sw_interface_add_del_callbacks (vnm, sw_if_index, /* is_create */ 0);
 631
 632   pool_put (im->sw_interfaces, sw);
 633 }
 634
 635 static clib_error_t *
 636 call_sw_interface_mtu_change_callbacks (vnet_main_t * vnm, u32 sw_if_index)
 637 {
 638   return call_elf_section_interface_callbacks
 639     (vnm, sw_if_index, 0, vnm->sw_interface_mtu_change_functions);
 640 }
 641
 642 void
 643 vnet_sw_interface_set_mtu (vnet_main_t * vnm, u32 sw_if_index, u32 mtu)
 644 {
 645   vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
 646
 647   if (si->mtu[VNET_MTU_L3] != mtu)
 648     {
 649       si->mtu[VNET_MTU_L3] = mtu;
 650       call_sw_interface_mtu_change_callbacks (vnm, sw_if_index);
 651     }
 652 }
 653
 654 void
 655 vnet_sw_interface_set_protocol_mtu (vnet_main_t * vnm, u32 sw_if_index,
 656                                     u32 mtu[])
 657 {
 658   vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
 659   bool changed = false;
 660   int i;
 661
 662   for (i = 0; i < VNET_N_MTU; i++)
 663     {
 664       if (si->mtu[i] != mtu[i])
 665         {
 666           si->mtu[i] = mtu[i];
 667           changed = true;
 668         }
 669     }
 670   /* Notify interested parties */
 671   if (changed)
 672     call_sw_interface_mtu_change_callbacks (vnm, sw_if_index);
 673 }
 674
 675 void
 676 vnet_sw_interface_ip_directed_broadcast (vnet_main_t * vnm,
 677                                          u32 sw_if_index, u8 enable)
 678 {
 679   vnet_sw_interface_t *si;
 680
 681   si = vnet_get_sw_interface (vnm, sw_if_index);
 682
 683   if (enable)
 684     si->flags |= VNET_SW_INTERFACE_FLAG_DIRECTED_BCAST;
 685   else
 686     si->flags &= ~VNET_SW_INTERFACE_FLAG_DIRECTED_BCAST;
 687
 688   ip4_directed_broadcast (sw_if_index, enable);
 689 }
 690
 691 /*
 692  * Reflect a change in hardware MTU on protocol MTUs
 693  */
 694 static walk_rc_t
 695 sw_interface_walk_callback (vnet_main_t * vnm, u32 sw_if_index, void *ctx)
 696 {
 697   u32 *link_mtu = ctx;
 698   vnet_sw_interface_set_mtu (vnm, sw_if_index, *link_mtu);
 699   return WALK_CONTINUE;
 700 }
 701
 702 void
 703 vnet_hw_interface_set_mtu (vnet_main_t * vnm, u32 hw_if_index, u32 mtu)
 704 {
 705   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
 706
 707   if (hi->max_packet_bytes != mtu)
 708     {
 709       hi->max_packet_bytes = mtu;
 710       ethernet_set_flags (vnm, hw_if_index, ETHERNET_INTERFACE_FLAG_MTU);
 711       vnet_hw_interface_walk_sw (vnm, hw_if_index, sw_interface_walk_callback,
 712                                  &mtu);
 713     }
 714 }
 715
 716 static void
 717 setup_tx_node (vlib_main_t * vm,
 718                u32 node_index, vnet_device_class_t * dev_class)
 719 {
 720   vlib_node_t *n = vlib_get_node (vm, node_index);
 721
 722   n->function = dev_class->tx_function;
 723   n->format_trace = dev_class->format_tx_trace;
 724
 725   vlib_register_errors (vm, node_index,
 726                         dev_class->tx_function_n_errors,
 727                         dev_class->tx_function_error_strings);
 728 }
 729
 730 static void
 731 setup_output_node (vlib_main_t * vm,
 732                    u32 node_index, vnet_hw_interface_class_t * hw_class)
 733 {
 734   vlib_node_t *n = vlib_get_node (vm, node_index);
 735   n->format_buffer = hw_class->format_header;
 736   n->unformat_buffer = hw_class->unformat_header;
 737 }
 738
 739 /* Register an interface instance. */
 740 u32
 741 vnet_register_interface (vnet_main_t * vnm,
 742                          u32 dev_class_index,
 743                          u32 dev_instance,
 744                          u32 hw_class_index, u32 hw_instance)
 745 {
 746   vnet_interface_main_t *im = &vnm->interface_main;
 747   vnet_hw_interface_t *hw;
 748   vnet_device_class_t *dev_class =
 749     vnet_get_device_class (vnm, dev_class_index);
 750   vnet_hw_interface_class_t *hw_class =
 751     vnet_get_hw_interface_class (vnm, hw_class_index);
 752   vlib_main_t *vm = vnm->vlib_main;
 753   vnet_feature_config_main_t *fcm;
 754   vnet_config_main_t *cm;
 755   u32 hw_index, i;
 756   char *tx_node_name = NULL, *output_node_name = NULL;
 757
 758   pool_get (im->hw_interfaces, hw);
 759   clib_memset (hw, 0, sizeof (*hw));
 760
 761   hw_index = hw - im->hw_interfaces;
 762   hw->hw_if_index = hw_index;
 763   hw->default_rx_mode = VNET_HW_INTERFACE_RX_MODE_POLLING;
 764
 765   if (dev_class->format_device_name)
 766     hw->name = format (0, "%U", dev_class->format_device_name, dev_instance);
 767   else if (hw_class->format_interface_name)
 768     hw->name = format (0, "%U", hw_class->format_interface_name,
 769                        dev_instance);
 770   else
 771     hw->name = format (0, "%s%x", hw_class->name, dev_instance);
 772
 773   if (!im->hw_interface_by_name)
 774     im->hw_interface_by_name = hash_create_vec ( /* size */ 0,
 775                                                 sizeof (hw->name[0]),
 776                                                 sizeof (uword));
 777
 778   hash_set_mem (im->hw_interface_by_name, hw->name, hw_index);
 779
 780   /* Make hardware interface point to software interface. */
 781   {
 782     vnet_sw_interface_t sw = {
 783       .type = VNET_SW_INTERFACE_TYPE_HARDWARE,
 784       .flood_class = VNET_FLOOD_CLASS_NORMAL,
 785       .hw_if_index = hw_index
 786     };
 787     hw->sw_if_index = vnet_create_sw_interface_no_callbacks (vnm, &sw);
 788   }
 789
 790   hw->dev_class_index = dev_class_index;
 791   hw->dev_instance = dev_instance;
 792   hw->hw_class_index = hw_class_index;
 793   hw->hw_instance = hw_instance;
 794
 795   hw->max_rate_bits_per_sec = 0;
 796   hw->min_packet_bytes = 0;
 797   vnet_sw_interface_set_mtu (vnm, hw->sw_if_index, 0);
 798
 799   if (dev_class->tx_function == 0)
 800     goto no_output_nodes;       /* No output/tx nodes to create */
 801
 802   tx_node_name = (char *) format (0, "%v-tx", hw->name);
 803   output_node_name = (char *) format (0, "%v-output", hw->name);
 804
 805   /* If we have previously deleted interface nodes, re-use them. */
 806   if (vec_len (im->deleted_hw_interface_nodes) > 0)
 807     {
 808       vnet_hw_interface_nodes_t *hn;
 809       vlib_node_t *node;
 810       vlib_node_runtime_t *nrt;
 811
 812       hn = vec_end (im->deleted_hw_interface_nodes) - 1;
 813
 814       hw->tx_node_index = hn->tx_node_index;
 815       hw->output_node_index = hn->output_node_index;
 816
 817       vlib_node_rename (vm, hw->tx_node_index, "%v", tx_node_name);
 818       vlib_node_rename (vm, hw->output_node_index, "%v", output_node_name);
 819
 820       /* *INDENT-OFF* */
 821       foreach_vlib_main ({
 822         vnet_interface_output_runtime_t *rt;
 823
 824         rt = vlib_node_get_runtime_data (this_vlib_main, hw->output_node_index);
 825         ASSERT (rt->is_deleted == 1);
 826         rt->is_deleted = 0;
 827         rt->hw_if_index = hw_index;
 828         rt->sw_if_index = hw->sw_if_index;
 829         rt->dev_instance = hw->dev_instance;
 830
 831         rt = vlib_node_get_runtime_data (this_vlib_main, hw->tx_node_index);
 832         rt->hw_if_index = hw_index;
 833         rt->sw_if_index = hw->sw_if_index;
 834         rt->dev_instance = hw->dev_instance;
 835       });
 836       /* *INDENT-ON* */
 837
 838       /* The new class may differ from the old one.
 839        * Functions have to be updated. */
 840       node = vlib_get_node (vm, hw->output_node_index);
 841       node->function = vnet_interface_output_node_multiarch_select ();
 842       node->format_trace = format_vnet_interface_output_trace;
 843       /* *INDENT-OFF* */
 844       foreach_vlib_main ({
 845         nrt = vlib_node_get_runtime (this_vlib_main, hw->output_node_index);
 846         nrt->function = node->function;
 847       });
 848       /* *INDENT-ON* */
 849
 850       node = vlib_get_node (vm, hw->tx_node_index);
 851       node->function = dev_class->tx_function;
 852       node->format_trace = dev_class->format_tx_trace;
 853       /* *INDENT-OFF* */
 854       foreach_vlib_main ({
 855         nrt = vlib_node_get_runtime (this_vlib_main, hw->tx_node_index);
 856         nrt->function = node->function;
 857       });
 858       /* *INDENT-ON* */
 859
 860       _vec_len (im->deleted_hw_interface_nodes) -= 1;
 861     }
 862   else
 863     {
 864       vlib_node_registration_t r;
 865       vnet_interface_output_runtime_t rt = {
 866         .hw_if_index = hw_index,
 867         .sw_if_index = hw->sw_if_index,
 868         .dev_instance = hw->dev_instance,
 869         .is_deleted = 0,
 870       };
 871
 872       clib_memset (&r, 0, sizeof (r));
 873       r.type = VLIB_NODE_TYPE_INTERNAL;
 874       r.runtime_data = &rt;
 875       r.runtime_data_bytes = sizeof (rt);
 876       r.scalar_size = 0;
 877       r.vector_size = sizeof (u32);
 878
 879       r.flags = VLIB_NODE_FLAG_IS_OUTPUT;
 880       r.name = tx_node_name;
 881       r.function = dev_class->tx_function;
 882
 883       hw->tx_node_index = vlib_register_node (vm, &r);
 884
 885       vlib_node_add_named_next_with_slot (vm, hw->tx_node_index,
 886                                           "error-drop",
 887                                           VNET_INTERFACE_TX_NEXT_DROP);
 888
 889       r.flags = 0;
 890       r.name = output_node_name;
 891       r.function = vnet_interface_output_node_multiarch_select ();
 892       r.format_trace = format_vnet_interface_output_trace;
 893
 894       {
 895         static char *e[] = {
 896           "interface is down",
 897           "interface is deleted",
 898         };
 899
 900         r.n_errors = ARRAY_LEN (e);
 901         r.error_strings = e;
 902       }
 903       hw->output_node_index = vlib_register_node (vm, &r);
 904
 905       vlib_node_add_named_next_with_slot (vm, hw->output_node_index,
 906                                           "error-drop",
 907                                           VNET_INTERFACE_OUTPUT_NEXT_DROP);
 908       vlib_node_add_next_with_slot (vm, hw->output_node_index,
 909                                     hw->tx_node_index,
 910                                     VNET_INTERFACE_OUTPUT_NEXT_TX);
 911
 912       /* add interface to the list of "output-interface" feature arc start nodes
 913          and clone nexts from 1st interface if it exists */
 914       fcm = vnet_feature_get_config_main (im->output_feature_arc_index);
 915       cm = &fcm->config_main;
 916       i = vec_len (cm->start_node_indices);
 917       vec_validate (cm->start_node_indices, i);
 918       cm->start_node_indices[i] = hw->output_node_index;
 919       if (hw_index)
 920         {
 921           /* copy nexts from 1st interface */
 922           vnet_hw_interface_t *first_hw;
 923           vlib_node_t *first_node;
 924
 925           first_hw = vnet_get_hw_interface (vnm, /* hw_if_index */ 0);
 926           first_node = vlib_get_node (vm, first_hw->output_node_index);
 927
 928           /* 1st 2 nexts are already added above */
 929           for (i = 2; i < vec_len (first_node->next_nodes); i++)
 930             vlib_node_add_next_with_slot (vm, hw->output_node_index,
 931                                           first_node->next_nodes[i], i);
 932         }
 933     }
 934
 935   setup_output_node (vm, hw->output_node_index, hw_class);
 936   setup_tx_node (vm, hw->tx_node_index, dev_class);
 937
 938 no_output_nodes:
 939   /* Call all up/down callbacks with zero flags when interface is created. */
 940   vnet_sw_interface_set_flags_helper (vnm, hw->sw_if_index, /* flags */ 0,
 941                                       VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE);
 942   vnet_hw_interface_set_flags_helper (vnm, hw_index, /* flags */ 0,
 943                                       VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE);
 944   vec_free (tx_node_name);
 945   vec_free (output_node_name);
 946
 947   return hw_index;
 948 }
 949
 950 void
 951 vnet_delete_hw_interface (vnet_main_t * vnm, u32 hw_if_index)
 952 {
 953   vnet_interface_main_t *im = &vnm->interface_main;
 954   vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
 955   vlib_main_t *vm = vnm->vlib_main;
 956   vnet_device_class_t *dev_class = vnet_get_device_class (vnm,
 957                                                           hw->dev_class_index);
 958   /* If it is up, mark it down. */
 959   if (hw->flags != 0)
 960     vnet_hw_interface_set_flags (vnm, hw_if_index, /* flags */ 0);
 961
 962   /* Call delete callbacks. */
 963   call_hw_interface_add_del_callbacks (vnm, hw_if_index, /* is_create */ 0);
 964
 965   /* Delete any sub-interfaces. */
 966   {
 967     u32 id, sw_if_index;
 968     /* *INDENT-OFF* */
 969     hash_foreach (id, sw_if_index, hw->sub_interface_sw_if_index_by_id,
 970     ({
 971       vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
 972       u64 sup_and_sub_key =
 973         ((u64) (si->sup_sw_if_index) << 32) | (u64) si->sub.id;
 974       hash_unset_mem_free (&im->sw_if_index_by_sup_and_sub, &sup_and_sub_key);
 975       vnet_delete_sw_interface (vnm, sw_if_index);
 976     }));
 977     hash_free (hw->sub_interface_sw_if_index_by_id);
 978     /* *INDENT-ON* */
 979   }
 980
 981   /* Delete software interface corresponding to hardware interface. */
 982   vnet_delete_sw_interface (vnm, hw->sw_if_index);
 983
 984   if (dev_class->tx_function)
 985     {
 986       /* Put output/tx nodes into recycle pool */
 987       vnet_hw_interface_nodes_t *dn;
 988
 989       /* *INDENT-OFF* */
 990       foreach_vlib_main
 991         ({
 992           vnet_interface_output_runtime_t *rt =
 993             vlib_node_get_runtime_data (this_vlib_main, hw->output_node_index);
 994
 995           /* Mark node runtime as deleted so output node (if called)
 996            * will drop packets. */
 997           rt->is_deleted = 1;
 998         });
 999       /* *INDENT-ON* */
1000
1001       vlib_node_rename (vm, hw->output_node_index,
1002                         "interface-%d-output-deleted", hw_if_index);
1003       vlib_node_rename (vm, hw->tx_node_index, "interface-%d-tx-deleted",
1004                         hw_if_index);
1005       vec_add2 (im->deleted_hw_interface_nodes, dn, 1);
1006       dn->tx_node_index = hw->tx_node_index;
1007       dn->output_node_index = hw->output_node_index;
1008     }
1009
1010   hash_unset_mem (im->hw_interface_by_name, hw->name);
1011   vec_free (hw->name);
1012   vec_free (hw->hw_address);
1013   vec_free (hw->input_node_thread_index_by_queue);
1014   vec_free (hw->dq_runtime_index_by_queue);
1015
1016   pool_put (im->hw_interfaces, hw);
1017 }
1018
1019 void
1020 vnet_hw_interface_walk_sw (vnet_main_t * vnm,
1021                            u32 hw_if_index,
1022                            vnet_hw_sw_interface_walk_t fn, void *ctx)
1023 {
1024   vnet_hw_interface_t *hi;
1025   u32 id, sw_if_index;
1026
1027   hi = vnet_get_hw_interface (vnm, hw_if_index);
1028   /* the super first, then the sub interfaces */
1029   if (WALK_STOP == fn (vnm, hi->sw_if_index, ctx))
1030     return;
1031
1032   /* *INDENT-OFF* */
1033   hash_foreach (id, sw_if_index,
1034                 hi->sub_interface_sw_if_index_by_id,
1035   ({
1036     if (WALK_STOP == fn (vnm, sw_if_index, ctx))
1037       break;
1038   }));
1039   /* *INDENT-ON* */
1040 }
1041
1042 void
1043 vnet_hw_interface_walk (vnet_main_t * vnm,
1044                         vnet_hw_interface_walk_t fn, void *ctx)
1045 {
1046   vnet_interface_main_t *im;
1047   vnet_hw_interface_t *hi;
1048
1049   im = &vnm->interface_main;
1050
1051   /* *INDENT-OFF* */
1052   pool_foreach (hi, im->hw_interfaces,
1053   ({
1054     if (WALK_STOP == fn(vnm, hi->hw_if_index, ctx))
1055       break;
1056   }));
1057   /* *INDENT-ON* */
1058 }
1059
1060 void
1061 vnet_sw_interface_walk (vnet_main_t * vnm,
1062                         vnet_sw_interface_walk_t fn, void *ctx)
1063 {
1064   vnet_interface_main_t *im;
1065   vnet_sw_interface_t *si;
1066
1067   im = &vnm->interface_main;
1068
1069   /* *INDENT-OFF* */
1070   pool_foreach (si, im->sw_interfaces,
1071   {
1072     if (WALK_STOP == fn (vnm, si, ctx))
1073       break;
1074   });
1075   /* *INDENT-ON* */
1076 }
1077
1078 void
1079 vnet_hw_interface_init_for_class (vnet_main_t * vnm, u32 hw_if_index,
1080                                   u32 hw_class_index, u32 hw_instance)
1081 {
1082   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1083   vnet_hw_interface_class_t *hc =
1084     vnet_get_hw_interface_class (vnm, hw_class_index);
1085
1086   hi->hw_class_index = hw_class_index;
1087   hi->hw_instance = hw_instance;
1088   setup_output_node (vnm->vlib_main, hi->output_node_index, hc);
1089 }
1090
1091 static clib_error_t *
1092 vnet_hw_interface_set_class_helper (vnet_main_t * vnm, u32 hw_if_index,
1093                                     u32 hw_class_index, u32 redistribute)
1094 {
1095   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1096   vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, hi->sw_if_index);
1097   vnet_hw_interface_class_t *old_class =
1098     vnet_get_hw_interface_class (vnm, hi->hw_class_index);
1099   vnet_hw_interface_class_t *new_class =
1100     vnet_get_hw_interface_class (vnm, hw_class_index);
1101   vnet_device_class_t *dev_class =
1102     vnet_get_device_class (vnm, hi->dev_class_index);
1103   clib_error_t *error = 0;
1104
1105   /* New class equals old class?  Nothing to do. */
1106   if (hi->hw_class_index == hw_class_index)
1107     return 0;
1108
1109   /* No need (and incorrect since admin up flag may be set) to do error checking when
1110      receiving unserialize message. */
1111   if (redistribute)
1112     {
1113       if (si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
1114         return clib_error_return (0,
1115                                   "%v must be admin down to change class from %s to %s",
1116                                   hi->name, old_class->name, new_class->name);
1117
1118       /* Make sure interface supports given class. */
1119       if ((new_class->is_valid_class_for_interface
1120            && !new_class->is_valid_class_for_interface (vnm, hw_if_index,
1121                                                         hw_class_index))
1122           || (dev_class->is_valid_class_for_interface
1123               && !dev_class->is_valid_class_for_interface (vnm, hw_if_index,
1124                                                            hw_class_index)))
1125         return clib_error_return (0,
1126                                   "%v class cannot be changed from %s to %s",
1127                                   hi->name, old_class->name, new_class->name);
1128
1129     }
1130
1131   if (old_class->hw_class_change)
1132     old_class->hw_class_change (vnm, hw_if_index, old_class->index,
1133                                 new_class->index);
1134
1135   vnet_hw_interface_init_for_class (vnm, hw_if_index, new_class->index,
1136                                     /* instance */ ~0);
1137
1138   if (new_class->hw_class_change)
1139     new_class->hw_class_change (vnm, hw_if_index, old_class->index,
1140                                 new_class->index);
1141
1142   if (dev_class->hw_class_change)
1143     dev_class->hw_class_change (vnm, hw_if_index, new_class->index);
1144
1145   return error;
1146 }
1147
1148 clib_error_t *
1149 vnet_hw_interface_set_class (vnet_main_t * vnm, u32 hw_if_index,
1150                              u32 hw_class_index)
1151 {
1152   return vnet_hw_interface_set_class_helper (vnm, hw_if_index, hw_class_index,
1153                                              /* redistribute */ 1);
1154 }
1155
1156 static int
1157 vnet_hw_interface_rx_redirect_to_node_helper (vnet_main_t * vnm,
1158                                               u32 hw_if_index,
1159                                               u32 node_index,
1160                                               u32 redistribute)
1161 {
1162   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1163   vnet_device_class_t *dev_class = vnet_get_device_class
1164     (vnm, hi->dev_class_index);
1165
1166   if (dev_class->rx_redirect_to_node)
1167     {
1168       dev_class->rx_redirect_to_node (vnm, hw_if_index, node_index);
1169       return 0;
1170     }
1171
1172   return VNET_API_ERROR_UNIMPLEMENTED;
1173 }
1174
1175 int
1176 vnet_hw_interface_rx_redirect_to_node (vnet_main_t * vnm, u32 hw_if_index,
1177                                        u32 node_index)
1178 {
1179   return vnet_hw_interface_rx_redirect_to_node_helper (vnm, hw_if_index,
1180                                                        node_index,
1181                                                        1 /* redistribute */ );
1182 }
1183
1184 word
1185 vnet_sw_interface_compare (vnet_main_t * vnm,
1186                            uword sw_if_index0, uword sw_if_index1)
1187 {
1188   vnet_sw_interface_t *sup0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1189   vnet_sw_interface_t *sup1 = vnet_get_sup_sw_interface (vnm, sw_if_index1);
1190   vnet_hw_interface_t *h0 = vnet_get_hw_interface (vnm, sup0->hw_if_index);
1191   vnet_hw_interface_t *h1 = vnet_get_hw_interface (vnm, sup1->hw_if_index);
1192
1193   if (h0 != h1)
1194     return vec_cmp (h0->name, h1->name);
1195   return (word) h0->hw_instance - (word) h1->hw_instance;
1196 }
1197
1198 word
1199 vnet_hw_interface_compare (vnet_main_t * vnm,
1200                            uword hw_if_index0, uword hw_if_index1)
1201 {
1202   vnet_hw_interface_t *h0 = vnet_get_hw_interface (vnm, hw_if_index0);
1203   vnet_hw_interface_t *h1 = vnet_get_hw_interface (vnm, hw_if_index1);
1204
1205   if (h0 != h1)
1206     return vec_cmp (h0->name, h1->name);
1207   return (word) h0->hw_instance - (word) h1->hw_instance;
1208 }
1209
1210 int
1211 vnet_sw_interface_is_p2p (vnet_main_t * vnm, u32 sw_if_index)
1212 {
1213   vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
1214   if ((si->type == VNET_SW_INTERFACE_TYPE_P2P) ||
1215       (si->type == VNET_SW_INTERFACE_TYPE_PIPE))
1216     return 1;
1217
1218   vnet_hw_interface_t *hw = vnet_get_sup_hw_interface (vnm, sw_if_index);
1219   vnet_hw_interface_class_t *hc =
1220     vnet_get_hw_interface_class (vnm, hw->hw_class_index);
1221
1222   return (hc->flags & VNET_HW_INTERFACE_CLASS_FLAG_P2P);
1223 }
1224
1225 clib_error_t *
1226 vnet_interface_init (vlib_main_t * vm)
1227 {
1228   vnet_main_t *vnm = vnet_get_main ();
1229   vnet_interface_main_t *im = &vnm->interface_main;
1230   vlib_buffer_t *b = 0;
1231   vnet_buffer_opaque_t *o = 0;
1232   clib_error_t *error;
1233
1234   /*
1235    * Keep people from shooting themselves in the foot.
1236    */
1237   if (sizeof (b->opaque) != sizeof (vnet_buffer_opaque_t))
1238     {
1239 #define _(a) if (sizeof(o->a) > sizeof (o->unused))                     \
1240       clib_warning                                                      \
1241         ("FATAL: size of opaque union subtype %s is %d (max %d)",       \
1242          #a, sizeof(o->a), sizeof (o->unused));
1243       foreach_buffer_opaque_union_subtype;
1244 #undef _
1245
1246       return clib_error_return
1247         (0, "FATAL: size of vlib buffer opaque %d, size of vnet opaque %d",
1248          sizeof (b->opaque), sizeof (vnet_buffer_opaque_t));
1249     }
1250
1251   im->sw_if_counter_lock = clib_mem_alloc_aligned (CLIB_CACHE_LINE_BYTES,
1252                                                    CLIB_CACHE_LINE_BYTES);
1253   im->sw_if_counter_lock[0] = 1;        /* should be no need */
1254
1255   vec_validate (im->sw_if_counters, VNET_N_SIMPLE_INTERFACE_COUNTER - 1);
1256 #define _(E,n,p)                                                        \
1257   im->sw_if_counters[VNET_INTERFACE_COUNTER_##E].name = #n;             \
1258   im->sw_if_counters[VNET_INTERFACE_COUNTER_##E].stat_segment_name = "/" #p "/" #n;
1259   foreach_simple_interface_counter_name
1260 #undef _
1261     vec_validate (im->combined_sw_if_counters,
1262                   VNET_N_COMBINED_INTERFACE_COUNTER - 1);
1263 #define _(E,n,p)                                                        \
1264   im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_##E].name = #n;    \
1265   im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_##E].stat_segment_name = "/" #p "/" #n;
1266   foreach_combined_interface_counter_name
1267 #undef _
1268     im->sw_if_counter_lock[0] = 0;
1269
1270   im->device_class_by_name = hash_create_string ( /* size */ 0,
1271                                                  sizeof (uword));
1272   {
1273     vnet_device_class_t *c;
1274
1275     c = vnm->device_class_registrations;
1276
1277     while (c)
1278       {
1279         c->index = vec_len (im->device_classes);
1280         hash_set_mem (im->device_class_by_name, c->name, c->index);
1281
1282         if (c->tx_fn_registrations)
1283           {
1284             vlib_node_fn_registration_t *fnr = c->tx_fn_registrations;
1285             int priority = -1;
1286
1287             /* to avoid confusion, please remove ".tx_function" statement
1288                from VNET_DEVICE_CLASS() if using function candidates */
1289             ASSERT (c->tx_function == 0);
1290
1291             while (fnr)
1292               {
1293                 if (fnr->priority > priority)
1294                   {
1295                     priority = fnr->priority;
1296                     c->tx_function = fnr->function;
1297                   }
1298                 fnr = fnr->next_registration;
1299               }
1300           }
1301
1302         vec_add1 (im->device_classes, c[0]);
1303         c = c->next_class_registration;
1304       }
1305   }
1306
1307   im->hw_interface_class_by_name = hash_create_string ( /* size */ 0,
1308                                                        sizeof (uword));
1309
1310   im->sw_if_index_by_sup_and_sub = hash_create_mem (0, sizeof (u64),
1311                                                     sizeof (uword));
1312   {
1313     vnet_hw_interface_class_t *c;
1314
1315     c = vnm->hw_interface_class_registrations;
1316
1317     while (c)
1318       {
1319         c->index = vec_len (im->hw_interface_classes);
1320         hash_set_mem (im->hw_interface_class_by_name, c->name, c->index);
1321
1322         if (NULL == c->build_rewrite)
1323           c->build_rewrite = default_build_rewrite;
1324         if (NULL == c->update_adjacency)
1325           c->update_adjacency = default_update_adjacency;
1326
1327         vec_add1 (im->hw_interface_classes, c[0]);
1328         c = c->next_class_registration;
1329       }
1330   }
1331
1332   if ((error = vlib_call_init_function (vm, vnet_interface_cli_init)))
1333     return error;
1334
1335   vnm->interface_tag_by_sw_if_index = hash_create (0, sizeof (uword));
1336
1337 #if VLIB_BUFFER_TRACE_TRAJECTORY > 0
1338   if ((error = vlib_call_init_function (vm, trajectory_trace_init)))
1339     return error;
1340 #endif
1341
1342   return 0;
1343 }
1344
1345 VLIB_INIT_FUNCTION (vnet_interface_init);
1346
1347 /* Kludge to renumber interface names [only!] */
1348 int
1349 vnet_interface_name_renumber (u32 sw_if_index, u32 new_show_dev_instance)
1350 {
1351   int rv;
1352   vnet_main_t *vnm = vnet_get_main ();
1353   vnet_interface_main_t *im = &vnm->interface_main;
1354   vnet_hw_interface_t *hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
1355
1356   vnet_device_class_t *dev_class = vnet_get_device_class
1357     (vnm, hi->dev_class_index);
1358
1359   if (dev_class->name_renumber == 0 || dev_class->format_device_name == 0)
1360     return VNET_API_ERROR_UNIMPLEMENTED;
1361
1362   rv = dev_class->name_renumber (hi, new_show_dev_instance);
1363
1364   if (rv)
1365     return rv;
1366
1367   hash_unset_mem (im->hw_interface_by_name, hi->name);
1368   vec_free (hi->name);
1369   /* Use the mapping we set up to call it Ishmael */
1370   hi->name = format (0, "%U", dev_class->format_device_name,
1371                      hi->dev_instance);
1372
1373   hash_set_mem (im->hw_interface_by_name, hi->name, hi->hw_if_index);
1374   return rv;
1375 }
1376
1377 clib_error_t *
1378 vnet_rename_interface (vnet_main_t * vnm, u32 hw_if_index, char *new_name)
1379 {
1380   vnet_interface_main_t *im = &vnm->interface_main;
1381   vlib_main_t *vm = vnm->vlib_main;
1382   vnet_hw_interface_t *hw;
1383   u8 *old_name;
1384   clib_error_t *error = 0;
1385
1386   hw = vnet_get_hw_interface (vnm, hw_if_index);
1387   if (!hw)
1388     {
1389       return clib_error_return (0,
1390                                 "unable to find hw interface for index %u",
1391                                 hw_if_index);
1392     }
1393
1394   old_name = hw->name;
1395
1396   /* set new hw->name */
1397   hw->name = format (0, "%s", new_name);
1398
1399   /* remove the old name to hw_if_index mapping and install the new one */
1400   hash_unset_mem (im->hw_interface_by_name, old_name);
1401   hash_set_mem (im->hw_interface_by_name, hw->name, hw_if_index);
1402
1403   /* rename tx/output nodes */
1404   vlib_node_rename (vm, hw->tx_node_index, "%v-tx", hw->name);
1405   vlib_node_rename (vm, hw->output_node_index, "%v-output", hw->name);
1406
1407   /* free the old name vector */
1408   vec_free (old_name);
1409
1410   return error;
1411 }
1412
1413 static clib_error_t *
1414 vnet_hw_interface_change_mac_address_helper (vnet_main_t * vnm,
1415                                              u32 hw_if_index,
1416                                              const u8 * mac_address)
1417 {
1418   clib_error_t *error = 0;
1419   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1420
1421   if (hi->hw_address)
1422     {
1423       u8 *old_address = vec_dup (hi->hw_address);
1424       vnet_device_class_t *dev_class =
1425         vnet_get_device_class (vnm, hi->dev_class_index);
1426       if (dev_class->mac_addr_change_function)
1427         {
1428           error =
1429             dev_class->mac_addr_change_function (hi, old_address,
1430                                                  mac_address);
1431         }
1432       if (!error)
1433         {
1434           vnet_hw_interface_class_t *hw_class;
1435
1436           hw_class = vnet_get_hw_interface_class (vnm, hi->hw_class_index);
1437
1438           if (NULL != hw_class->mac_addr_change_function)
1439             hw_class->mac_addr_change_function (hi, old_address, mac_address);
1440         }
1441       else
1442         {
1443           error =
1444             clib_error_return (0,
1445                                "MAC Address Change is not supported on this interface");
1446         }
1447       vec_free (old_address);
1448     }
1449   else
1450     {
1451       error =
1452         clib_error_return (0,
1453                            "mac address change is not supported for interface index %u",
1454                            hw_if_index);
1455     }
1456   return error;
1457 }
1458
1459 clib_error_t *
1460 vnet_hw_interface_change_mac_address (vnet_main_t * vnm, u32 hw_if_index,
1461                                       const u8 * mac_address)
1462 {
1463   return vnet_hw_interface_change_mac_address_helper
1464     (vnm, hw_if_index, mac_address);
1465 }
1466
1467 /* update the unnumbered state of an interface*/
1468 void
1469 vnet_sw_interface_update_unnumbered (u32 unnumbered_sw_if_index,
1470                                      u32 ip_sw_if_index, u8 enable)
1471 {
1472   vnet_main_t *vnm = vnet_get_main ();
1473   vnet_sw_interface_t *si;
1474   u32 was_unnum;
1475
1476   si = vnet_get_sw_interface (vnm, unnumbered_sw_if_index);
1477   was_unnum = (si->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED);
1478
1479   if (enable)
1480     {
1481       si->flags |= VNET_SW_INTERFACE_FLAG_UNNUMBERED;
1482       si->unnumbered_sw_if_index = ip_sw_if_index;
1483
1484       ip4_main.lookup_main.if_address_pool_index_by_sw_if_index
1485         [unnumbered_sw_if_index] =
1486         ip4_main.
1487         lookup_main.if_address_pool_index_by_sw_if_index[ip_sw_if_index];
1488       ip6_main.
1489         lookup_main.if_address_pool_index_by_sw_if_index
1490         [unnumbered_sw_if_index] =
1491         ip6_main.
1492         lookup_main.if_address_pool_index_by_sw_if_index[ip_sw_if_index];
1493     }
1494   else
1495     {
1496       si->flags &= ~(VNET_SW_INTERFACE_FLAG_UNNUMBERED);
1497       si->unnumbered_sw_if_index = (u32) ~ 0;
1498
1499       ip4_main.lookup_main.if_address_pool_index_by_sw_if_index
1500         [unnumbered_sw_if_index] = ~0;
1501       ip6_main.lookup_main.if_address_pool_index_by_sw_if_index
1502         [unnumbered_sw_if_index] = ~0;
1503     }
1504
1505   if (was_unnum != (si->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED))
1506     {
1507       ip4_sw_interface_enable_disable (unnumbered_sw_if_index, enable);
1508       ip6_sw_interface_enable_disable (unnumbered_sw_if_index, enable);
1509     }
1510 }
1511
1512 vnet_l3_packet_type_t
1513 vnet_link_to_l3_proto (vnet_link_t link)
1514 {
1515   switch (link)
1516     {
1517     case VNET_LINK_IP4:
1518       return (VNET_L3_PACKET_TYPE_IP4);
1519     case VNET_LINK_IP6:
1520       return (VNET_L3_PACKET_TYPE_IP6);
1521     case VNET_LINK_MPLS:
1522       return (VNET_L3_PACKET_TYPE_MPLS);
1523     case VNET_LINK_ARP:
1524       return (VNET_L3_PACKET_TYPE_ARP);
1525     case VNET_LINK_ETHERNET:
1526     case VNET_LINK_NSH:
1527       ASSERT (0);
1528       break;
1529     }
1530   ASSERT (0);
1531   return (0);
1532 }
1533
1534 vnet_mtu_t
1535 vnet_link_to_mtu (vnet_link_t link)
1536 {
1537   switch (link)
1538     {
1539     case VNET_LINK_IP4:
1540       return (VNET_MTU_IP4);
1541     case VNET_LINK_IP6:
1542       return (VNET_MTU_IP6);
1543     case VNET_LINK_MPLS:
1544       return (VNET_MTU_MPLS);
1545     default:
1546       return (VNET_MTU_L3);
1547     }
1548 }
1549
1550 u8 *
1551 default_build_rewrite (vnet_main_t * vnm,
1552                        u32 sw_if_index,
1553                        vnet_link_t link_type, const void *dst_address)
1554 {
1555   return (NULL);
1556 }
1557
1558 void
1559 default_update_adjacency (vnet_main_t * vnm, u32 sw_if_index, u32 ai)
1560 {
1561   ip_adjacency_t *adj;
1562
1563   adj = adj_get (ai);
1564
1565   switch (adj->lookup_next_index)
1566     {
1567     case IP_LOOKUP_NEXT_GLEAN:
1568       adj_glean_update_rewrite (ai);
1569       break;
1570     case IP_LOOKUP_NEXT_ARP:
1571     case IP_LOOKUP_NEXT_BCAST:
1572       /*
1573        * default rewrite in neighbour adj
1574        */
1575       adj_nbr_update_rewrite
1576         (ai,
1577          ADJ_NBR_REWRITE_FLAG_COMPLETE,
1578          vnet_build_rewrite_for_sw_interface (vnm,
1579                                               sw_if_index,
1580                                               adj_get_link_type (ai), NULL));
1581       break;
1582     case IP_LOOKUP_NEXT_MCAST:
1583       /*
1584        * mcast traffic also uses default rewrite string with no mcast
1585        * switch time updates.
1586        */
1587       adj_mcast_update_rewrite
1588         (ai,
1589          vnet_build_rewrite_for_sw_interface (vnm,
1590                                               sw_if_index,
1591                                               adj_get_link_type (ai),
1592                                               NULL), 0);
1593       break;
1594     case IP_LOOKUP_NEXT_DROP:
1595     case IP_LOOKUP_NEXT_PUNT:
1596     case IP_LOOKUP_NEXT_LOCAL:
1597     case IP_LOOKUP_NEXT_REWRITE:
1598     case IP_LOOKUP_NEXT_MCAST_MIDCHAIN:
1599     case IP_LOOKUP_NEXT_MIDCHAIN:
1600     case IP_LOOKUP_NEXT_ICMP_ERROR:
1601     case IP_LOOKUP_N_NEXT:
1602       ASSERT (0);
1603       break;
1604     }
1605 }
1606
1607 int collect_detailed_interface_stats_flag = 0;
1608
1609 void
1610 collect_detailed_interface_stats_flag_set (void)
1611 {
1612   collect_detailed_interface_stats_flag = 1;
1613 }
1614
1615 void
1616 collect_detailed_interface_stats_flag_clear (void)
1617 {
1618   collect_detailed_interface_stats_flag = 0;
1619 }
1620
1621 static clib_error_t *
1622 collect_detailed_interface_stats_cli (vlib_main_t * vm,
1623                                       unformat_input_t * input,
1624                                       vlib_cli_command_t * cmd)
1625 {
1626   unformat_input_t _line_input, *line_input = &_line_input;
1627   clib_error_t *error = NULL;
1628
1629   /* Get a line of input. */
1630   if (!unformat_user (input, unformat_line_input, line_input))
1631     return clib_error_return (0, "expected enable | disable");
1632
1633   while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
1634     {
1635       if (unformat (line_input, "enable") || unformat (line_input, "on"))
1636         collect_detailed_interface_stats_flag_set ();
1637       else if (unformat (line_input, "disable")
1638                || unformat (line_input, "off"))
1639         collect_detailed_interface_stats_flag_clear ();
1640       else
1641         {
1642           error = clib_error_return (0, "unknown input `%U'",
1643                                      format_unformat_error, line_input);
1644           goto done;
1645         }
1646     }
1647
1648 done:
1649   unformat_free (line_input);
1650   return error;
1651 }
1652
1653 /* *INDENT-OFF* */
1654 VLIB_CLI_COMMAND (collect_detailed_interface_stats_command, static) = {
1655   .path = "interface collect detailed-stats",
1656   .short_help = "interface collect detailed-stats <enable|disable>",
1657   .function = collect_detailed_interface_stats_cli,
1658 };
1659 /* *INDENT-ON* */
1660
1661 /*
1662  * fd.io coding-style-patch-verification: ON
1663  *
1664  * Local Variables:
1665  * eval: (c-set-style "gnu")
1666  * End:
1667  */