src/vnet/interface.c

   1 /*
   2  * Copyright (c) 2015 Cisco and/or its affiliates.
   3  * Licensed under the Apache License, Version 2.0 (the "License");
   4  * you may not use this file except in compliance with the License.
   5  * You may obtain a copy of the License at:
   6  *
   7  *     http://www.apache.org/licenses/LICENSE-2.0
   8  *
   9  * Unless required by applicable law or agreed to in writing, software
  10  * distributed under the License is distributed on an "AS IS" BASIS,
  11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12  * See the License for the specific language governing permissions and
  13  * limitations under the License.
  14  */
  15 /*
  16  * interface.c: VNET interfaces/sub-interfaces
  17  *
  18  * Copyright (c) 2008 Eliot Dresselhaus
  19  *
  20  * Permission is hereby granted, free of charge, to any person obtaining
  21  * a copy of this software and associated documentation files (the
  22  * "Software"), to deal in the Software without restriction, including
  23  * without limitation the rights to use, copy, modify, merge, publish,
  24  * distribute, sublicense, and/or sell copies of the Software, and to
  25  * permit persons to whom the Software is furnished to do so, subject to
  26  * the following conditions:
  27  *
  28  * The above copyright notice and this permission notice shall be
  29  * included in all copies or substantial portions of the Software.
  30  *
  31  *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  32  *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  33  *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  34  *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  35  *  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  36  *  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  37  *  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  38  */
  39
  40 #include <vnet/vnet.h>
  41 #include <vnet/plugin/plugin.h>
  42 #include <vnet/fib/ip6_fib.h>
  43 #include <vnet/adj/adj.h>
  44 #include <vnet/adj/adj_mcast.h>
  45 #include <vnet/l2/l2_input.h>
  46
  47 typedef enum vnet_interface_helper_flags_t_
  48 {
  49   VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE = (1 << 0),
  50   VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE = (1 << 1),
  51 } vnet_interface_helper_flags_t;
  52
  53 static clib_error_t *vnet_hw_interface_set_flags_helper (vnet_main_t * vnm,
  54                                                          u32 hw_if_index,
  55                                                          vnet_hw_interface_flags_t
  56                                                          flags,
  57                                                          vnet_interface_helper_flags_t
  58                                                          helper_flags);
  59
  60 static clib_error_t *vnet_sw_interface_set_flags_helper (vnet_main_t * vnm,
  61                                                          u32 sw_if_index,
  62                                                          vnet_sw_interface_flags_t
  63                                                          flags,
  64                                                          vnet_interface_helper_flags_t
  65                                                          helper_flags);
  66
  67 static clib_error_t *vnet_hw_interface_set_class_helper (vnet_main_t * vnm,
  68                                                          u32 hw_if_index,
  69                                                          u32 hw_class_index,
  70                                                          u32 redistribute);
  71
  72 typedef struct
  73 {
  74   /* Either sw or hw interface index. */
  75   u32 sw_hw_if_index;
  76
  77   /* Flags. */
  78   u32 flags;
  79 } vnet_sw_hw_interface_state_t;
  80
  81 static void
  82 serialize_vec_vnet_sw_hw_interface_state (serialize_main_t * m, va_list * va)
  83 {
  84   vnet_sw_hw_interface_state_t *s =
  85     va_arg (*va, vnet_sw_hw_interface_state_t *);
  86   u32 n = va_arg (*va, u32);
  87   u32 i;
  88   for (i = 0; i < n; i++)
  89     {
  90       serialize_integer (m, s[i].sw_hw_if_index,
  91                          sizeof (s[i].sw_hw_if_index));
  92       serialize_integer (m, s[i].flags, sizeof (s[i].flags));
  93     }
  94 }
  95
  96 static void
  97 unserialize_vec_vnet_sw_hw_interface_state (serialize_main_t * m,
  98                                             va_list * va)
  99 {
 100   vnet_sw_hw_interface_state_t *s =
 101     va_arg (*va, vnet_sw_hw_interface_state_t *);
 102   u32 n = va_arg (*va, u32);
 103   u32 i;
 104   for (i = 0; i < n; i++)
 105     {
 106       unserialize_integer (m, &s[i].sw_hw_if_index,
 107                            sizeof (s[i].sw_hw_if_index));
 108       unserialize_integer (m, &s[i].flags, sizeof (s[i].flags));
 109     }
 110 }
 111
 112 static vnet_sw_interface_flags_t
 113 vnet_hw_interface_flags_to_sw (vnet_hw_interface_flags_t hwf)
 114 {
 115   vnet_sw_interface_flags_t swf = VNET_SW_INTERFACE_FLAG_NONE;
 116
 117   if (hwf & VNET_HW_INTERFACE_FLAG_LINK_UP)
 118     swf |= VNET_SW_INTERFACE_FLAG_ADMIN_UP;
 119
 120   return (swf);
 121 }
 122
 123 void
 124 serialize_vnet_interface_state (serialize_main_t * m, va_list * va)
 125 {
 126   vnet_main_t *vnm = va_arg (*va, vnet_main_t *);
 127   vnet_sw_hw_interface_state_t *sts = 0, *st;
 128   vnet_sw_interface_t *sif;
 129   vnet_hw_interface_t *hif;
 130   vnet_interface_main_t *im = &vnm->interface_main;
 131
 132   /* Serialize hardware interface classes since they may have changed.
 133      Must do this before sending up/down flags. */
 134   /* *INDENT-OFF* */
 135   pool_foreach (hif, im->hw_interfaces, ({
 136     vnet_hw_interface_class_t * hw_class = vnet_get_hw_interface_class (vnm, hif->hw_class_index);
 137     serialize_cstring (m, hw_class->name);
 138   }));
 139   /* *INDENT-ON* */
 140
 141   /* Send sw/hw interface state when non-zero. */
 142   /* *INDENT-OFF* */
 143   pool_foreach (sif, im->sw_interfaces, ({
 144     if (sif->flags != 0)
 145       {
 146         vec_add2 (sts, st, 1);
 147         st->sw_hw_if_index = sif->sw_if_index;
 148         st->flags = sif->flags;
 149       }
 150   }));
 151   /* *INDENT-ON* */
 152
 153   vec_serialize (m, sts, serialize_vec_vnet_sw_hw_interface_state);
 154
 155   if (sts)
 156     _vec_len (sts) = 0;
 157
 158   /* *INDENT-OFF* */
 159   pool_foreach (hif, im->hw_interfaces, ({
 160     if (hif->flags != 0)
 161       {
 162         vec_add2 (sts, st, 1);
 163         st->sw_hw_if_index = hif->hw_if_index;
 164         st->flags = vnet_hw_interface_flags_to_sw(hif->flags);
 165       }
 166   }));
 167   /* *INDENT-ON* */
 168
 169   vec_serialize (m, sts, serialize_vec_vnet_sw_hw_interface_state);
 170
 171   vec_free (sts);
 172 }
 173
 174 static vnet_hw_interface_flags_t
 175 vnet_sw_interface_flags_to_hw (vnet_sw_interface_flags_t swf)
 176 {
 177   vnet_hw_interface_flags_t hwf = VNET_HW_INTERFACE_FLAG_NONE;
 178
 179   if (swf & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
 180     hwf |= VNET_HW_INTERFACE_FLAG_LINK_UP;
 181
 182   return (hwf);
 183 }
 184
 185 void
 186 unserialize_vnet_interface_state (serialize_main_t * m, va_list * va)
 187 {
 188   vnet_main_t *vnm = va_arg (*va, vnet_main_t *);
 189   vnet_sw_hw_interface_state_t *sts = 0, *st;
 190
 191   /* First set interface hardware class. */
 192   {
 193     vnet_interface_main_t *im = &vnm->interface_main;
 194     vnet_hw_interface_t *hif;
 195     char *class_name;
 196     uword *p;
 197     clib_error_t *error;
 198
 199     /* *INDENT-OFF* */
 200     pool_foreach (hif, im->hw_interfaces, ({
 201       unserialize_cstring (m, &class_name);
 202       p = hash_get_mem (im->hw_interface_class_by_name, class_name);
 203       ASSERT (p != 0);
 204       error = vnet_hw_interface_set_class_helper (vnm, hif->hw_if_index, p[0], /* redistribute */ 0);
 205       if (error)
 206         clib_error_report (error);
 207       vec_free (class_name);
 208     }));
 209     /* *INDENT-ON* */
 210   }
 211
 212   vec_unserialize (m, &sts, unserialize_vec_vnet_sw_hw_interface_state);
 213   vec_foreach (st, sts)
 214     vnet_sw_interface_set_flags_helper (vnm, st->sw_hw_if_index, st->flags,
 215                                         /* no distribute */ 0);
 216   vec_free (sts);
 217
 218   vec_unserialize (m, &sts, unserialize_vec_vnet_sw_hw_interface_state);
 219   vec_foreach (st, sts)
 220   {
 221     vnet_hw_interface_set_flags_helper
 222       (vnm, st->sw_hw_if_index, vnet_sw_interface_flags_to_hw (st->flags),
 223        /* no distribute */ 0);
 224   }
 225   vec_free (sts);
 226 }
 227
 228 static clib_error_t *
 229 call_elf_section_interface_callbacks (vnet_main_t * vnm, u32 if_index,
 230                                       u32 flags,
 231                                       _vnet_interface_function_list_elt_t **
 232                                       elts)
 233 {
 234   _vnet_interface_function_list_elt_t *elt;
 235   vnet_interface_function_priority_t prio;
 236   clib_error_t *error = 0;
 237
 238   for (prio = VNET_ITF_FUNC_PRIORITY_LOW;
 239        prio <= VNET_ITF_FUNC_PRIORITY_HIGH; prio++)
 240     {
 241       elt = elts[prio];
 242
 243       while (elt)
 244         {
 245           error = elt->fp (vnm, if_index, flags);
 246           if (error)
 247             return error;
 248           elt = elt->next_interface_function;
 249         }
 250     }
 251   return error;
 252 }
 253
 254 static clib_error_t *
 255 call_hw_interface_add_del_callbacks (vnet_main_t * vnm, u32 hw_if_index,
 256                                      u32 is_create)
 257 {
 258   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
 259   vnet_hw_interface_class_t *hw_class =
 260     vnet_get_hw_interface_class (vnm, hi->hw_class_index);
 261   vnet_device_class_t *dev_class =
 262     vnet_get_device_class (vnm, hi->dev_class_index);
 263   clib_error_t *error = 0;
 264
 265   if (hw_class->interface_add_del_function
 266       && (error =
 267           hw_class->interface_add_del_function (vnm, hw_if_index, is_create)))
 268     return error;
 269
 270   if (dev_class->interface_add_del_function
 271       && (error =
 272           dev_class->interface_add_del_function (vnm, hw_if_index,
 273                                                  is_create)))
 274     return error;
 275
 276   error = call_elf_section_interface_callbacks
 277     (vnm, hw_if_index, is_create, vnm->hw_interface_add_del_functions);
 278
 279   return error;
 280 }
 281
 282 static clib_error_t *
 283 call_sw_interface_add_del_callbacks (vnet_main_t * vnm, u32 sw_if_index,
 284                                      u32 is_create)
 285 {
 286   return call_elf_section_interface_callbacks
 287     (vnm, sw_if_index, is_create, vnm->sw_interface_add_del_functions);
 288 }
 289
 290 static clib_error_t *
 291 vnet_hw_interface_set_flags_helper (vnet_main_t * vnm, u32 hw_if_index,
 292                                     vnet_hw_interface_flags_t flags,
 293                                     vnet_interface_helper_flags_t
 294                                     helper_flags)
 295 {
 296   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
 297   vnet_hw_interface_class_t *hw_class =
 298     vnet_get_hw_interface_class (vnm, hi->hw_class_index);
 299   u32 mask;
 300   clib_error_t *error = 0;
 301   u32 is_create =
 302     (helper_flags & VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE) != 0;
 303
 304   mask =
 305     (VNET_HW_INTERFACE_FLAG_LINK_UP | VNET_HW_INTERFACE_FLAG_DUPLEX_MASK);
 306   flags &= mask;
 307
 308   /* Call hardware interface add/del callbacks. */
 309   if (is_create)
 310     call_hw_interface_add_del_callbacks (vnm, hw_if_index, is_create);
 311
 312   /* Already in the desired state? */
 313   if (!is_create && (hi->flags & mask) == flags)
 314     goto done;
 315
 316   if ((hi->flags & VNET_HW_INTERFACE_FLAG_LINK_UP) !=
 317       (flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
 318     {
 319       /* Do hardware class (e.g. ethernet). */
 320       if (hw_class->link_up_down_function
 321           && (error = hw_class->link_up_down_function (vnm, hw_if_index,
 322                                                        flags)))
 323         goto done;
 324
 325       error = call_elf_section_interface_callbacks
 326         (vnm, hw_if_index, flags, vnm->hw_interface_link_up_down_functions);
 327
 328       if (error)
 329         goto done;
 330     }
 331
 332   hi->flags &= ~mask;
 333   hi->flags |= flags;
 334
 335 done:
 336   return error;
 337 }
 338
 339 static clib_error_t *
 340 vnet_sw_interface_set_flags_helper (vnet_main_t * vnm, u32 sw_if_index,
 341                                     vnet_sw_interface_flags_t flags,
 342                                     vnet_interface_helper_flags_t
 343                                     helper_flags)
 344 {
 345   vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
 346   u32 mask;
 347   clib_error_t *error = 0;
 348   u32 is_create =
 349     (helper_flags & VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE) != 0;
 350   u32 old_flags;
 351
 352   mask = VNET_SW_INTERFACE_FLAG_ADMIN_UP | VNET_SW_INTERFACE_FLAG_PUNT;
 353   flags &= mask;
 354
 355   if (is_create)
 356     {
 357       error =
 358         call_sw_interface_add_del_callbacks (vnm, sw_if_index, is_create);
 359       if (error)
 360         goto done;
 361
 362       if (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
 363         {
 364           /* Notify everyone when the interface is created as admin up */
 365           error = call_elf_section_interface_callbacks (vnm, sw_if_index,
 366                                                         flags,
 367                                                         vnm->
 368                                                         sw_interface_admin_up_down_functions);
 369           if (error)
 370             goto done;
 371         }
 372     }
 373   else
 374     {
 375       vnet_sw_interface_t *si_sup = si;
 376
 377       /* Check that super interface is in correct state. */
 378       if (si->type == VNET_SW_INTERFACE_TYPE_SUB)
 379         {
 380           si_sup = vnet_get_sw_interface (vnm, si->sup_sw_if_index);
 381
 382           /* Check to see if we're bringing down the soft interface and if it's parent is up */
 383           if ((flags != (si_sup->flags & mask)) &&
 384               (!((flags == 0)
 385                  && ((si_sup->flags & mask) ==
 386                      VNET_SW_INTERFACE_FLAG_ADMIN_UP))))
 387             {
 388               error = clib_error_return (0, "super-interface %U must be %U",
 389                                          format_vnet_sw_interface_name, vnm,
 390                                          si_sup,
 391                                          format_vnet_sw_interface_flags,
 392                                          flags);
 393               goto done;
 394             }
 395         }
 396
 397       /* Already in the desired state? */
 398       if ((si->flags & mask) == flags)
 399         goto done;
 400
 401       /* Sub-interfaces of hardware interfaces that do no redistribute,
 402          do not redistribute themselves. */
 403       if (si_sup->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
 404         {
 405           vnet_hw_interface_t *hi =
 406             vnet_get_hw_interface (vnm, si_sup->hw_if_index);
 407           vnet_device_class_t *dev_class =
 408             vnet_get_device_class (vnm, hi->dev_class_index);
 409           if (!dev_class->redistribute)
 410             helper_flags &=
 411               ~VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE;
 412         }
 413
 414       /* set the flags now before invoking the registered clients
 415        * so that the state they query is consistent with the state here notified */
 416       old_flags = si->flags;
 417       si->flags &= ~mask;
 418       si->flags |= flags;
 419       if ((flags | old_flags) & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
 420         error = call_elf_section_interface_callbacks
 421           (vnm, sw_if_index, flags,
 422            vnm->sw_interface_admin_up_down_functions);
 423
 424       if (error)
 425         {
 426           /* restore flags on error */
 427           si->flags = old_flags;
 428           goto done;
 429         }
 430
 431       if (si->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
 432         {
 433           vnet_hw_interface_t *hi =
 434             vnet_get_hw_interface (vnm, si->hw_if_index);
 435           vnet_hw_interface_class_t *hw_class =
 436             vnet_get_hw_interface_class (vnm, hi->hw_class_index);
 437           vnet_device_class_t *dev_class =
 438             vnet_get_device_class (vnm, hi->dev_class_index);
 439
 440           if ((flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) &&
 441               (si->flags & VNET_SW_INTERFACE_FLAG_ERROR))
 442             {
 443               error = clib_error_return (0, "Interface in the error state");
 444               goto done;
 445             }
 446
 447           /* save the si admin up flag */
 448           old_flags = si->flags;
 449
 450           /* update si admin up flag in advance if we are going admin down */
 451           if (!(flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
 452             si->flags &= ~VNET_SW_INTERFACE_FLAG_ADMIN_UP;
 453
 454           if (dev_class->admin_up_down_function
 455               && (error = dev_class->admin_up_down_function (vnm,
 456                                                              si->hw_if_index,
 457                                                              flags)))
 458             {
 459               /* restore si admin up flag to it's original state on errors */
 460               si->flags = old_flags;
 461               goto done;
 462             }
 463
 464           if (hw_class->admin_up_down_function
 465               && (error = hw_class->admin_up_down_function (vnm,
 466                                                             si->hw_if_index,
 467                                                             flags)))
 468             {
 469               /* restore si admin up flag to it's original state on errors */
 470               si->flags = old_flags;
 471               goto done;
 472             }
 473
 474           /* Admin down implies link down. */
 475           if (!(flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
 476               && (hi->flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
 477             vnet_hw_interface_set_flags_helper (vnm, si->hw_if_index,
 478                                                 hi->flags &
 479                                                 ~VNET_HW_INTERFACE_FLAG_LINK_UP,
 480                                                 helper_flags);
 481         }
 482     }
 483
 484   si->flags &= ~mask;
 485   si->flags |= flags;
 486
 487 done:
 488   return error;
 489 }
 490
 491 clib_error_t *
 492 vnet_hw_interface_set_flags (vnet_main_t * vnm, u32 hw_if_index,
 493                              vnet_hw_interface_flags_t flags)
 494 {
 495   return vnet_hw_interface_set_flags_helper
 496     (vnm, hw_if_index, flags,
 497      VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE);
 498 }
 499
 500 clib_error_t *
 501 vnet_sw_interface_set_flags (vnet_main_t * vnm, u32 sw_if_index,
 502                              vnet_sw_interface_flags_t flags)
 503 {
 504   return vnet_sw_interface_set_flags_helper
 505     (vnm, sw_if_index, flags,
 506      VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE);
 507 }
 508
 509 void
 510 vnet_sw_interface_admin_up (vnet_main_t * vnm, u32 sw_if_index)
 511 {
 512   u32 flags = vnet_sw_interface_get_flags (vnm, sw_if_index);
 513
 514   if (!(flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
 515     {
 516       flags |= VNET_SW_INTERFACE_FLAG_ADMIN_UP;
 517       vnet_sw_interface_set_flags (vnm, sw_if_index, flags);
 518     }
 519 }
 520
 521 void
 522 vnet_sw_interface_admin_down (vnet_main_t * vnm, u32 sw_if_index)
 523 {
 524   u32 flags = vnet_sw_interface_get_flags (vnm, sw_if_index);
 525
 526   if (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
 527     {
 528       flags &= ~(VNET_SW_INTERFACE_FLAG_ADMIN_UP);
 529       vnet_sw_interface_set_flags (vnm, sw_if_index, flags);
 530     }
 531 }
 532
 533 static u32
 534 vnet_create_sw_interface_no_callbacks (vnet_main_t * vnm,
 535                                        vnet_sw_interface_t * template)
 536 {
 537   vnet_interface_main_t *im = &vnm->interface_main;
 538   vnet_sw_interface_t *sw;
 539   u32 sw_if_index;
 540
 541   pool_get (im->sw_interfaces, sw);
 542   sw_if_index = sw - im->sw_interfaces;
 543
 544   sw[0] = template[0];
 545
 546   sw->flags = 0;
 547   sw->sw_if_index = sw_if_index;
 548   if (sw->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
 549     sw->sup_sw_if_index = sw->sw_if_index;
 550
 551   /* Allocate counters for this interface. */
 552   {
 553     u32 i;
 554
 555     vnet_interface_counter_lock (im);
 556
 557     for (i = 0; i < vec_len (im->sw_if_counters); i++)
 558       {
 559         vlib_validate_simple_counter (&im->sw_if_counters[i], sw_if_index);
 560         vlib_zero_simple_counter (&im->sw_if_counters[i], sw_if_index);
 561       }
 562
 563     for (i = 0; i < vec_len (im->combined_sw_if_counters); i++)
 564       {
 565         vlib_validate_combined_counter (&im->combined_sw_if_counters[i],
 566                                         sw_if_index);
 567         vlib_zero_combined_counter (&im->combined_sw_if_counters[i],
 568                                     sw_if_index);
 569       }
 570
 571     vnet_interface_counter_unlock (im);
 572   }
 573
 574   return sw_if_index;
 575 }
 576
 577 clib_error_t *
 578 vnet_create_sw_interface (vnet_main_t * vnm, vnet_sw_interface_t * template,
 579                           u32 * sw_if_index)
 580 {
 581   clib_error_t *error;
 582   vnet_hw_interface_t *hi;
 583   vnet_device_class_t *dev_class;
 584
 585   hi = vnet_get_sup_hw_interface (vnm, template->sup_sw_if_index);
 586   dev_class = vnet_get_device_class (vnm, hi->dev_class_index);
 587
 588   if (template->type == VNET_SW_INTERFACE_TYPE_SUB &&
 589       dev_class->subif_add_del_function)
 590     {
 591       error = dev_class->subif_add_del_function (vnm, hi->hw_if_index,
 592                                                  (struct vnet_sw_interface_t
 593                                                   *) template, 1);
 594       if (error)
 595         return error;
 596     }
 597
 598   *sw_if_index = vnet_create_sw_interface_no_callbacks (vnm, template);
 599   error = vnet_sw_interface_set_flags_helper
 600     (vnm, *sw_if_index, template->flags,
 601      VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE);
 602
 603   if (error)
 604     {
 605       /* undo the work done by vnet_create_sw_interface_no_callbacks() */
 606       vnet_interface_main_t *im = &vnm->interface_main;
 607       vnet_sw_interface_t *sw =
 608         pool_elt_at_index (im->sw_interfaces, *sw_if_index);
 609       pool_put (im->sw_interfaces, sw);
 610     }
 611
 612   return error;
 613 }
 614
 615 void
 616 vnet_delete_sw_interface (vnet_main_t * vnm, u32 sw_if_index)
 617 {
 618   vnet_interface_main_t *im = &vnm->interface_main;
 619   vnet_sw_interface_t *sw =
 620     pool_elt_at_index (im->sw_interfaces, sw_if_index);
 621
 622   /* Check if the interface has config and is removed from L2 BD or XConnect */
 623   vlib_main_t *vm = vlib_get_main ();
 624   l2_input_config_t *config;
 625   if (sw_if_index < vec_len (l2input_main.configs))
 626     {
 627       config = vec_elt_at_index (l2input_main.configs, sw_if_index);
 628       if (config->xconnect)
 629         set_int_l2_mode (vm, vnm, MODE_L3, config->output_sw_if_index, 0,
 630                          L2_BD_PORT_TYPE_NORMAL, 0, 0);
 631       if (config->xconnect || config->bridge)
 632         set_int_l2_mode (vm, vnm, MODE_L3, sw_if_index, 0,
 633                          L2_BD_PORT_TYPE_NORMAL, 0, 0);
 634     }
 635   vnet_clear_sw_interface_tag (vnm, sw_if_index);
 636
 637   /* Bring down interface in case it is up. */
 638   if (sw->flags != 0)
 639     vnet_sw_interface_set_flags (vnm, sw_if_index, /* flags */ 0);
 640
 641   call_sw_interface_add_del_callbacks (vnm, sw_if_index, /* is_create */ 0);
 642
 643   pool_put (im->sw_interfaces, sw);
 644 }
 645
 646 static clib_error_t *
 647 call_sw_interface_mtu_change_callbacks (vnet_main_t * vnm, u32 sw_if_index)
 648 {
 649   return call_elf_section_interface_callbacks
 650     (vnm, sw_if_index, 0, vnm->sw_interface_mtu_change_functions);
 651 }
 652
 653 void
 654 vnet_sw_interface_set_mtu (vnet_main_t * vnm, u32 sw_if_index, u32 mtu)
 655 {
 656   vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
 657
 658   if (si->mtu[VNET_MTU_L3] != mtu)
 659     {
 660       si->mtu[VNET_MTU_L3] = mtu;
 661       call_sw_interface_mtu_change_callbacks (vnm, sw_if_index);
 662     }
 663 }
 664
 665 void
 666 vnet_sw_interface_set_protocol_mtu (vnet_main_t * vnm, u32 sw_if_index,
 667                                     u32 mtu[])
 668 {
 669   vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
 670   bool changed = false;
 671   int i;
 672
 673   for (i = 0; i < VNET_N_MTU; i++)
 674     {
 675       if (si->mtu[i] != mtu[i])
 676         {
 677           si->mtu[i] = mtu[i];
 678           changed = true;
 679         }
 680     }
 681   /* Notify interested parties */
 682   if (changed)
 683     call_sw_interface_mtu_change_callbacks (vnm, sw_if_index);
 684 }
 685
 686 void
 687 vnet_sw_interface_ip_directed_broadcast (vnet_main_t * vnm,
 688                                          u32 sw_if_index, u8 enable)
 689 {
 690   vnet_sw_interface_t *si;
 691
 692   si = vnet_get_sw_interface (vnm, sw_if_index);
 693
 694   if (enable)
 695     si->flags |= VNET_SW_INTERFACE_FLAG_DIRECTED_BCAST;
 696   else
 697     si->flags &= ~VNET_SW_INTERFACE_FLAG_DIRECTED_BCAST;
 698
 699   ip4_directed_broadcast (sw_if_index, enable);
 700 }
 701
 702 /*
 703  * Reflect a change in hardware MTU on protocol MTUs
 704  */
 705 static walk_rc_t
 706 sw_interface_walk_callback (vnet_main_t * vnm, u32 sw_if_index, void *ctx)
 707 {
 708   u32 *link_mtu = ctx;
 709   vnet_sw_interface_set_mtu (vnm, sw_if_index, *link_mtu);
 710   return WALK_CONTINUE;
 711 }
 712
 713 void
 714 vnet_hw_interface_set_mtu (vnet_main_t * vnm, u32 hw_if_index, u32 mtu)
 715 {
 716   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
 717
 718   if (hi->max_packet_bytes != mtu)
 719     {
 720       hi->max_packet_bytes = mtu;
 721       ethernet_set_flags (vnm, hw_if_index, ETHERNET_INTERFACE_FLAG_MTU);
 722       vnet_hw_interface_walk_sw (vnm, hw_if_index, sw_interface_walk_callback,
 723                                  &mtu);
 724     }
 725 }
 726
 727 static void
 728 setup_tx_node (vlib_main_t * vm,
 729                u32 node_index, vnet_device_class_t * dev_class)
 730 {
 731   vlib_node_t *n = vlib_get_node (vm, node_index);
 732
 733   n->function = dev_class->tx_function;
 734   n->format_trace = dev_class->format_tx_trace;
 735
 736   vlib_register_errors (vm, node_index,
 737                         dev_class->tx_function_n_errors,
 738                         dev_class->tx_function_error_strings);
 739 }
 740
 741 static void
 742 setup_output_node (vlib_main_t * vm,
 743                    u32 node_index, vnet_hw_interface_class_t * hw_class)
 744 {
 745   vlib_node_t *n = vlib_get_node (vm, node_index);
 746   n->format_buffer = hw_class->format_header;
 747   n->unformat_buffer = hw_class->unformat_header;
 748 }
 749
 750 /* Register an interface instance. */
 751 u32
 752 vnet_register_interface (vnet_main_t * vnm,
 753                          u32 dev_class_index,
 754                          u32 dev_instance,
 755                          u32 hw_class_index, u32 hw_instance)
 756 {
 757   vnet_interface_main_t *im = &vnm->interface_main;
 758   vnet_hw_interface_t *hw;
 759   vnet_device_class_t *dev_class =
 760     vnet_get_device_class (vnm, dev_class_index);
 761   vnet_hw_interface_class_t *hw_class =
 762     vnet_get_hw_interface_class (vnm, hw_class_index);
 763   vlib_main_t *vm = vnm->vlib_main;
 764   vnet_feature_config_main_t *fcm;
 765   vnet_config_main_t *cm;
 766   u32 hw_index, i;
 767   char *tx_node_name = NULL, *output_node_name = NULL;
 768
 769   pool_get (im->hw_interfaces, hw);
 770   clib_memset (hw, 0, sizeof (*hw));
 771   hw->trace_classify_table_index = ~0;
 772
 773   hw_index = hw - im->hw_interfaces;
 774   hw->hw_if_index = hw_index;
 775   hw->default_rx_mode = VNET_HW_INTERFACE_RX_MODE_POLLING;
 776
 777   if (dev_class->format_device_name)
 778     hw->name = format (0, "%U", dev_class->format_device_name, dev_instance);
 779   else if (hw_class->format_interface_name)
 780     hw->name = format (0, "%U", hw_class->format_interface_name,
 781                        dev_instance);
 782   else
 783     hw->name = format (0, "%s%x", hw_class->name, dev_instance);
 784
 785   if (!im->hw_interface_by_name)
 786     im->hw_interface_by_name = hash_create_vec ( /* size */ 0,
 787                                                 sizeof (hw->name[0]),
 788                                                 sizeof (uword));
 789
 790   hash_set_mem (im->hw_interface_by_name, hw->name, hw_index);
 791
 792   /* Make hardware interface point to software interface. */
 793   {
 794     vnet_sw_interface_t sw = {
 795       .type = VNET_SW_INTERFACE_TYPE_HARDWARE,
 796       .flood_class = VNET_FLOOD_CLASS_NORMAL,
 797       .hw_if_index = hw_index
 798     };
 799     hw->sw_if_index = vnet_create_sw_interface_no_callbacks (vnm, &sw);
 800   }
 801
 802   hw->dev_class_index = dev_class_index;
 803   hw->dev_instance = dev_instance;
 804   hw->hw_class_index = hw_class_index;
 805   hw->hw_instance = hw_instance;
 806
 807   hw->max_rate_bits_per_sec = 0;
 808   hw->min_packet_bytes = 0;
 809   vnet_sw_interface_set_mtu (vnm, hw->sw_if_index, 0);
 810
 811   if (dev_class->tx_function == 0)
 812     goto no_output_nodes;       /* No output/tx nodes to create */
 813
 814   tx_node_name = (char *) format (0, "%v-tx", hw->name);
 815   output_node_name = (char *) format (0, "%v-output", hw->name);
 816
 817   /* If we have previously deleted interface nodes, re-use them. */
 818   if (vec_len (im->deleted_hw_interface_nodes) > 0)
 819     {
 820       vnet_hw_interface_nodes_t *hn;
 821       vlib_node_t *node;
 822       vlib_node_runtime_t *nrt;
 823
 824       hn = vec_end (im->deleted_hw_interface_nodes) - 1;
 825
 826       hw->tx_node_index = hn->tx_node_index;
 827       hw->output_node_index = hn->output_node_index;
 828
 829       vlib_node_rename (vm, hw->tx_node_index, "%v", tx_node_name);
 830       vlib_node_rename (vm, hw->output_node_index, "%v", output_node_name);
 831
 832       /* *INDENT-OFF* */
 833       foreach_vlib_main ({
 834         vnet_interface_output_runtime_t *rt;
 835
 836         rt = vlib_node_get_runtime_data (this_vlib_main, hw->output_node_index);
 837         ASSERT (rt->is_deleted == 1);
 838         rt->is_deleted = 0;
 839         rt->hw_if_index = hw_index;
 840         rt->sw_if_index = hw->sw_if_index;
 841         rt->dev_instance = hw->dev_instance;
 842
 843         rt = vlib_node_get_runtime_data (this_vlib_main, hw->tx_node_index);
 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       /* *INDENT-ON* */
 849
 850       /* The new class may differ from the old one.
 851        * Functions have to be updated. */
 852       node = vlib_get_node (vm, hw->output_node_index);
 853       node->function = vnet_interface_output_node;
 854       node->format_trace = format_vnet_interface_output_trace;
 855       /* *INDENT-OFF* */
 856       foreach_vlib_main ({
 857         nrt = vlib_node_get_runtime (this_vlib_main, hw->output_node_index);
 858         nrt->function = node->function;
 859       });
 860       /* *INDENT-ON* */
 861
 862       node = vlib_get_node (vm, hw->tx_node_index);
 863       node->function = dev_class->tx_function;
 864       node->format_trace = dev_class->format_tx_trace;
 865       /* *INDENT-OFF* */
 866       foreach_vlib_main ({
 867         nrt = vlib_node_get_runtime (this_vlib_main, hw->tx_node_index);
 868         nrt->function = node->function;
 869       });
 870       /* *INDENT-ON* */
 871
 872       _vec_len (im->deleted_hw_interface_nodes) -= 1;
 873     }
 874   else
 875     {
 876       vlib_node_registration_t r;
 877       vnet_interface_output_runtime_t rt = {
 878         .hw_if_index = hw_index,
 879         .sw_if_index = hw->sw_if_index,
 880         .dev_instance = hw->dev_instance,
 881         .is_deleted = 0,
 882       };
 883
 884       clib_memset (&r, 0, sizeof (r));
 885       r.type = VLIB_NODE_TYPE_INTERNAL;
 886       r.runtime_data = &rt;
 887       r.runtime_data_bytes = sizeof (rt);
 888       r.scalar_size = 0;
 889       r.vector_size = sizeof (u32);
 890
 891       r.flags = VLIB_NODE_FLAG_IS_OUTPUT;
 892       r.name = tx_node_name;
 893       r.function = dev_class->tx_function;
 894
 895       hw->tx_node_index = vlib_register_node (vm, &r);
 896
 897       vlib_node_add_named_next_with_slot (vm, hw->tx_node_index,
 898                                           "error-drop",
 899                                           VNET_INTERFACE_TX_NEXT_DROP);
 900
 901       r.flags = 0;
 902       r.name = output_node_name;
 903       r.function = vnet_interface_output_node;
 904       r.format_trace = format_vnet_interface_output_trace;
 905
 906       {
 907         static char *e[] = {
 908           "interface is down",
 909           "interface is deleted",
 910           "no buffers to segment GSO",
 911         };
 912
 913         r.n_errors = ARRAY_LEN (e);
 914         r.error_strings = e;
 915       }
 916       hw->output_node_index = vlib_register_node (vm, &r);
 917
 918       vlib_node_add_named_next_with_slot (vm, hw->output_node_index,
 919                                           "error-drop",
 920                                           VNET_INTERFACE_OUTPUT_NEXT_DROP);
 921       vlib_node_add_next_with_slot (vm, hw->output_node_index,
 922                                     hw->tx_node_index,
 923                                     VNET_INTERFACE_OUTPUT_NEXT_TX);
 924
 925       /* add interface to the list of "output-interface" feature arc start nodes
 926          and clone nexts from 1st interface if it exists */
 927       fcm = vnet_feature_get_config_main (im->output_feature_arc_index);
 928       cm = &fcm->config_main;
 929       i = vec_len (cm->start_node_indices);
 930       vec_validate (cm->start_node_indices, i);
 931       cm->start_node_indices[i] = hw->output_node_index;
 932       if (hw_index)
 933         {
 934           /* copy nexts from 1st interface */
 935           vnet_hw_interface_t *first_hw;
 936           vlib_node_t *first_node;
 937
 938           first_hw = vnet_get_hw_interface (vnm, /* hw_if_index */ 0);
 939           first_node = vlib_get_node (vm, first_hw->output_node_index);
 940
 941           /* 1st 2 nexts are already added above */
 942           for (i = 2; i < vec_len (first_node->next_nodes); i++)
 943             vlib_node_add_next_with_slot (vm, hw->output_node_index,
 944                                           first_node->next_nodes[i], i);
 945         }
 946     }
 947
 948   setup_output_node (vm, hw->output_node_index, hw_class);
 949   setup_tx_node (vm, hw->tx_node_index, dev_class);
 950
 951 no_output_nodes:
 952   /* Call all up/down callbacks with zero flags when interface is created. */
 953   vnet_sw_interface_set_flags_helper (vnm, hw->sw_if_index, /* flags */ 0,
 954                                       VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE);
 955   vnet_hw_interface_set_flags_helper (vnm, hw_index, /* flags */ 0,
 956                                       VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE);
 957   vec_free (tx_node_name);
 958   vec_free (output_node_name);
 959
 960   return hw_index;
 961 }
 962
 963 void
 964 vnet_delete_hw_interface (vnet_main_t * vnm, u32 hw_if_index)
 965 {
 966   vnet_interface_main_t *im = &vnm->interface_main;
 967   vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
 968   vlib_main_t *vm = vnm->vlib_main;
 969   vnet_device_class_t *dev_class = vnet_get_device_class (vnm,
 970                                                           hw->dev_class_index);
 971   /* If it is up, mark it down. */
 972   if (hw->flags != 0)
 973     vnet_hw_interface_set_flags (vnm, hw_if_index, /* flags */ 0);
 974
 975   /* Call delete callbacks. */
 976   call_hw_interface_add_del_callbacks (vnm, hw_if_index, /* is_create */ 0);
 977
 978   /* Delete any sub-interfaces. */
 979   {
 980     u32 id, sw_if_index;
 981     /* *INDENT-OFF* */
 982     hash_foreach (id, sw_if_index, hw->sub_interface_sw_if_index_by_id,
 983     ({
 984       vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
 985       u64 sup_and_sub_key =
 986         ((u64) (si->sup_sw_if_index) << 32) | (u64) si->sub.id;
 987       hash_unset_mem_free (&im->sw_if_index_by_sup_and_sub, &sup_and_sub_key);
 988       vnet_delete_sw_interface (vnm, sw_if_index);
 989     }));
 990     hash_free (hw->sub_interface_sw_if_index_by_id);
 991     /* *INDENT-ON* */
 992   }
 993
 994   /* Delete software interface corresponding to hardware interface. */
 995   vnet_delete_sw_interface (vnm, hw->sw_if_index);
 996
 997   if (dev_class->tx_function)
 998     {
 999       /* Put output/tx nodes into recycle pool */
1000       vnet_hw_interface_nodes_t *dn;
1001
1002       /* *INDENT-OFF* */
1003       foreach_vlib_main
1004         ({
1005           vnet_interface_output_runtime_t *rt =
1006             vlib_node_get_runtime_data (this_vlib_main, hw->output_node_index);
1007
1008           /* Mark node runtime as deleted so output node (if called)
1009            * will drop packets. */
1010           rt->is_deleted = 1;
1011         });
1012       /* *INDENT-ON* */
1013
1014       vlib_node_rename (vm, hw->output_node_index,
1015                         "interface-%d-output-deleted", hw_if_index);
1016       vlib_node_rename (vm, hw->tx_node_index, "interface-%d-tx-deleted",
1017                         hw_if_index);
1018       vec_add2 (im->deleted_hw_interface_nodes, dn, 1);
1019       dn->tx_node_index = hw->tx_node_index;
1020       dn->output_node_index = hw->output_node_index;
1021     }
1022
1023   hash_unset_mem (im->hw_interface_by_name, hw->name);
1024   vec_free (hw->name);
1025   vec_free (hw->hw_address);
1026   vec_free (hw->input_node_thread_index_by_queue);
1027   vec_free (hw->dq_runtime_index_by_queue);
1028
1029   pool_put (im->hw_interfaces, hw);
1030 }
1031
1032 void
1033 vnet_hw_interface_walk_sw (vnet_main_t * vnm,
1034                            u32 hw_if_index,
1035                            vnet_hw_sw_interface_walk_t fn, void *ctx)
1036 {
1037   vnet_hw_interface_t *hi;
1038   u32 id, sw_if_index;
1039
1040   hi = vnet_get_hw_interface (vnm, hw_if_index);
1041   /* the super first, then the sub interfaces */
1042   if (WALK_STOP == fn (vnm, hi->sw_if_index, ctx))
1043     return;
1044
1045   /* *INDENT-OFF* */
1046   hash_foreach (id, sw_if_index,
1047                 hi->sub_interface_sw_if_index_by_id,
1048   ({
1049     if (WALK_STOP == fn (vnm, sw_if_index, ctx))
1050       break;
1051   }));
1052   /* *INDENT-ON* */
1053 }
1054
1055 void
1056 vnet_hw_interface_walk (vnet_main_t * vnm,
1057                         vnet_hw_interface_walk_t fn, void *ctx)
1058 {
1059   vnet_interface_main_t *im;
1060   vnet_hw_interface_t *hi;
1061
1062   im = &vnm->interface_main;
1063
1064   /* *INDENT-OFF* */
1065   pool_foreach (hi, im->hw_interfaces,
1066   ({
1067     if (WALK_STOP == fn(vnm, hi->hw_if_index, ctx))
1068       break;
1069   }));
1070   /* *INDENT-ON* */
1071 }
1072
1073 void
1074 vnet_sw_interface_walk (vnet_main_t * vnm,
1075                         vnet_sw_interface_walk_t fn, void *ctx)
1076 {
1077   vnet_interface_main_t *im;
1078   vnet_sw_interface_t *si;
1079
1080   im = &vnm->interface_main;
1081
1082   /* *INDENT-OFF* */
1083   pool_foreach (si, im->sw_interfaces,
1084   {
1085     if (WALK_STOP == fn (vnm, si, ctx))
1086       break;
1087   });
1088   /* *INDENT-ON* */
1089 }
1090
1091 void
1092 vnet_hw_interface_init_for_class (vnet_main_t * vnm, u32 hw_if_index,
1093                                   u32 hw_class_index, u32 hw_instance)
1094 {
1095   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1096   vnet_hw_interface_class_t *hc =
1097     vnet_get_hw_interface_class (vnm, hw_class_index);
1098
1099   hi->hw_class_index = hw_class_index;
1100   hi->hw_instance = hw_instance;
1101   setup_output_node (vnm->vlib_main, hi->output_node_index, hc);
1102 }
1103
1104 static clib_error_t *
1105 vnet_hw_interface_set_class_helper (vnet_main_t * vnm, u32 hw_if_index,
1106                                     u32 hw_class_index, u32 redistribute)
1107 {
1108   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1109   vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, hi->sw_if_index);
1110   vnet_hw_interface_class_t *old_class =
1111     vnet_get_hw_interface_class (vnm, hi->hw_class_index);
1112   vnet_hw_interface_class_t *new_class =
1113     vnet_get_hw_interface_class (vnm, hw_class_index);
1114   vnet_device_class_t *dev_class =
1115     vnet_get_device_class (vnm, hi->dev_class_index);
1116   clib_error_t *error = 0;
1117
1118   /* New class equals old class?  Nothing to do. */
1119   if (hi->hw_class_index == hw_class_index)
1120     return 0;
1121
1122   /* No need (and incorrect since admin up flag may be set) to do error checking when
1123      receiving unserialize message. */
1124   if (redistribute)
1125     {
1126       if (si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
1127         return clib_error_return (0,
1128                                   "%v must be admin down to change class from %s to %s",
1129                                   hi->name, old_class->name, new_class->name);
1130
1131       /* Make sure interface supports given class. */
1132       if ((new_class->is_valid_class_for_interface
1133            && !new_class->is_valid_class_for_interface (vnm, hw_if_index,
1134                                                         hw_class_index))
1135           || (dev_class->is_valid_class_for_interface
1136               && !dev_class->is_valid_class_for_interface (vnm, hw_if_index,
1137                                                            hw_class_index)))
1138         return clib_error_return (0,
1139                                   "%v class cannot be changed from %s to %s",
1140                                   hi->name, old_class->name, new_class->name);
1141
1142     }
1143
1144   if (old_class->hw_class_change)
1145     old_class->hw_class_change (vnm, hw_if_index, old_class->index,
1146                                 new_class->index);
1147
1148   vnet_hw_interface_init_for_class (vnm, hw_if_index, new_class->index,
1149                                     /* instance */ ~0);
1150
1151   if (new_class->hw_class_change)
1152     new_class->hw_class_change (vnm, hw_if_index, old_class->index,
1153                                 new_class->index);
1154
1155   if (dev_class->hw_class_change)
1156     dev_class->hw_class_change (vnm, hw_if_index, new_class->index);
1157
1158   return error;
1159 }
1160
1161 clib_error_t *
1162 vnet_hw_interface_set_class (vnet_main_t * vnm, u32 hw_if_index,
1163                              u32 hw_class_index)
1164 {
1165   return vnet_hw_interface_set_class_helper (vnm, hw_if_index, hw_class_index,
1166                                              /* redistribute */ 1);
1167 }
1168
1169 static int
1170 vnet_hw_interface_rx_redirect_to_node_helper (vnet_main_t * vnm,
1171                                               u32 hw_if_index,
1172                                               u32 node_index,
1173                                               u32 redistribute)
1174 {
1175   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1176   vnet_device_class_t *dev_class = vnet_get_device_class
1177     (vnm, hi->dev_class_index);
1178
1179   if (dev_class->rx_redirect_to_node)
1180     {
1181       dev_class->rx_redirect_to_node (vnm, hw_if_index, node_index);
1182       return 0;
1183     }
1184
1185   return VNET_API_ERROR_UNIMPLEMENTED;
1186 }
1187
1188 int
1189 vnet_hw_interface_rx_redirect_to_node (vnet_main_t * vnm, u32 hw_if_index,
1190                                        u32 node_index)
1191 {
1192   return vnet_hw_interface_rx_redirect_to_node_helper (vnm, hw_if_index,
1193                                                        node_index,
1194                                                        1 /* redistribute */ );
1195 }
1196
1197 word
1198 vnet_sw_interface_compare (vnet_main_t * vnm,
1199                            uword sw_if_index0, uword sw_if_index1)
1200 {
1201   vnet_sw_interface_t *sup0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1202   vnet_sw_interface_t *sup1 = vnet_get_sup_sw_interface (vnm, sw_if_index1);
1203   vnet_hw_interface_t *h0 = vnet_get_hw_interface (vnm, sup0->hw_if_index);
1204   vnet_hw_interface_t *h1 = vnet_get_hw_interface (vnm, sup1->hw_if_index);
1205
1206   if (h0 != h1)
1207     return vec_cmp (h0->name, h1->name);
1208   return (word) h0->hw_instance - (word) h1->hw_instance;
1209 }
1210
1211 word
1212 vnet_hw_interface_compare (vnet_main_t * vnm,
1213                            uword hw_if_index0, uword hw_if_index1)
1214 {
1215   vnet_hw_interface_t *h0 = vnet_get_hw_interface (vnm, hw_if_index0);
1216   vnet_hw_interface_t *h1 = vnet_get_hw_interface (vnm, hw_if_index1);
1217
1218   if (h0 != h1)
1219     return vec_cmp (h0->name, h1->name);
1220   return (word) h0->hw_instance - (word) h1->hw_instance;
1221 }
1222
1223 int
1224 vnet_sw_interface_is_p2p (vnet_main_t * vnm, u32 sw_if_index)
1225 {
1226   vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
1227   if ((si->type == VNET_SW_INTERFACE_TYPE_P2P) ||
1228       (si->type == VNET_SW_INTERFACE_TYPE_PIPE))
1229     return 1;
1230
1231   vnet_hw_interface_t *hw = vnet_get_sup_hw_interface (vnm, sw_if_index);
1232   vnet_hw_interface_class_t *hc =
1233     vnet_get_hw_interface_class (vnm, hw->hw_class_index);
1234
1235   return (hc->flags & VNET_HW_INTERFACE_CLASS_FLAG_P2P);
1236 }
1237
1238 int
1239 vnet_sw_interface_is_nbma (vnet_main_t * vnm, u32 sw_if_index)
1240 {
1241   vnet_hw_interface_t *hw = vnet_get_sup_hw_interface (vnm, sw_if_index);
1242   vnet_hw_interface_class_t *hc =
1243     vnet_get_hw_interface_class (vnm, hw->hw_class_index);
1244
1245   return (hc->flags & VNET_HW_INTERFACE_CLASS_FLAG_NBMA);
1246 }
1247
1248 clib_error_t *
1249 vnet_interface_init (vlib_main_t * vm)
1250 {
1251   vnet_main_t *vnm = vnet_get_main ();
1252   vnet_interface_main_t *im = &vnm->interface_main;
1253   vlib_buffer_t *b = 0;
1254   vnet_buffer_opaque_t *o = 0;
1255   clib_error_t *error;
1256
1257   /*
1258    * Keep people from shooting themselves in the foot.
1259    */
1260   if (sizeof (b->opaque) != sizeof (vnet_buffer_opaque_t))
1261     {
1262 #define _(a) if (sizeof(o->a) > sizeof (o->unused))                     \
1263       clib_warning                                                      \
1264         ("FATAL: size of opaque union subtype %s is %d (max %d)",       \
1265          #a, sizeof(o->a), sizeof (o->unused));
1266       foreach_buffer_opaque_union_subtype;
1267 #undef _
1268
1269       return clib_error_return
1270         (0, "FATAL: size of vlib buffer opaque %d, size of vnet opaque %d",
1271          sizeof (b->opaque), sizeof (vnet_buffer_opaque_t));
1272     }
1273
1274   clib_spinlock_init (&im->sw_if_counter_lock);
1275   clib_spinlock_lock (&im->sw_if_counter_lock); /* should be no need */
1276
1277   vec_validate (im->sw_if_counters, VNET_N_SIMPLE_INTERFACE_COUNTER - 1);
1278 #define _(E,n,p)                                                        \
1279   im->sw_if_counters[VNET_INTERFACE_COUNTER_##E].name = #n;             \
1280   im->sw_if_counters[VNET_INTERFACE_COUNTER_##E].stat_segment_name = "/" #p "/" #n;
1281   foreach_simple_interface_counter_name
1282 #undef _
1283     vec_validate (im->combined_sw_if_counters,
1284                   VNET_N_COMBINED_INTERFACE_COUNTER - 1);
1285 #define _(E,n,p)                                                        \
1286   im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_##E].name = #n;    \
1287   im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_##E].stat_segment_name = "/" #p "/" #n;
1288   foreach_combined_interface_counter_name
1289 #undef _
1290     clib_spinlock_unlock (&im->sw_if_counter_lock);
1291
1292   im->device_class_by_name = hash_create_string ( /* size */ 0,
1293                                                  sizeof (uword));
1294   {
1295     vnet_device_class_t *c;
1296
1297     c = vnm->device_class_registrations;
1298
1299     while (c)
1300       {
1301         c->index = vec_len (im->device_classes);
1302         hash_set_mem (im->device_class_by_name, c->name, c->index);
1303
1304         if (c->tx_fn_registrations)
1305           {
1306             vlib_node_fn_registration_t *fnr = c->tx_fn_registrations;
1307             int priority = -1;
1308
1309             /* to avoid confusion, please remove ".tx_function" statement
1310                from VNET_DEVICE_CLASS() if using function candidates */
1311             ASSERT (c->tx_function == 0);
1312
1313             while (fnr)
1314               {
1315                 if (fnr->priority > priority)
1316                   {
1317                     priority = fnr->priority;
1318                     c->tx_function = fnr->function;
1319                   }
1320                 fnr = fnr->next_registration;
1321               }
1322           }
1323
1324         vec_add1 (im->device_classes, c[0]);
1325         c = c->next_class_registration;
1326       }
1327   }
1328
1329   im->hw_interface_class_by_name = hash_create_string ( /* size */ 0,
1330                                                        sizeof (uword));
1331
1332   im->sw_if_index_by_sup_and_sub = hash_create_mem (0, sizeof (u64),
1333                                                     sizeof (uword));
1334   {
1335     vnet_hw_interface_class_t *c;
1336
1337     c = vnm->hw_interface_class_registrations;
1338
1339     while (c)
1340       {
1341         c->index = vec_len (im->hw_interface_classes);
1342         hash_set_mem (im->hw_interface_class_by_name, c->name, c->index);
1343
1344         if (NULL == c->build_rewrite)
1345           c->build_rewrite = default_build_rewrite;
1346         if (NULL == c->update_adjacency)
1347           c->update_adjacency = default_update_adjacency;
1348
1349         vec_add1 (im->hw_interface_classes, c[0]);
1350         c = c->next_class_registration;
1351       }
1352   }
1353
1354   /* init per-thread data */
1355   vec_validate_aligned (im->per_thread_data, vlib_num_workers (),
1356                         CLIB_CACHE_LINE_BYTES);
1357
1358   if ((error = vlib_call_init_function (vm, vnet_interface_cli_init)))
1359     return error;
1360
1361   vnm->interface_tag_by_sw_if_index = hash_create (0, sizeof (uword));
1362
1363 #if VLIB_BUFFER_TRACE_TRAJECTORY > 0
1364   if ((error = vlib_call_init_function (vm, trajectory_trace_init)))
1365     return error;
1366 #endif
1367
1368   return 0;
1369 }
1370
1371 VLIB_INIT_FUNCTION (vnet_interface_init);
1372
1373 /* Kludge to renumber interface names [only!] */
1374 int
1375 vnet_interface_name_renumber (u32 sw_if_index, u32 new_show_dev_instance)
1376 {
1377   int rv;
1378   vnet_main_t *vnm = vnet_get_main ();
1379   vnet_interface_main_t *im = &vnm->interface_main;
1380   vnet_hw_interface_t *hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
1381
1382   vnet_device_class_t *dev_class = vnet_get_device_class
1383     (vnm, hi->dev_class_index);
1384
1385   if (dev_class->name_renumber == 0 || dev_class->format_device_name == 0)
1386     return VNET_API_ERROR_UNIMPLEMENTED;
1387
1388   rv = dev_class->name_renumber (hi, new_show_dev_instance);
1389
1390   if (rv)
1391     return rv;
1392
1393   hash_unset_mem (im->hw_interface_by_name, hi->name);
1394   vec_free (hi->name);
1395   /* Use the mapping we set up to call it Ishmael */
1396   hi->name = format (0, "%U", dev_class->format_device_name,
1397                      hi->dev_instance);
1398
1399   hash_set_mem (im->hw_interface_by_name, hi->name, hi->hw_if_index);
1400   return rv;
1401 }
1402
1403 clib_error_t *
1404 vnet_rename_interface (vnet_main_t * vnm, u32 hw_if_index, char *new_name)
1405 {
1406   vnet_interface_main_t *im = &vnm->interface_main;
1407   vlib_main_t *vm = vnm->vlib_main;
1408   vnet_hw_interface_t *hw;
1409   u8 *old_name;
1410   clib_error_t *error = 0;
1411
1412   hw = vnet_get_hw_interface (vnm, hw_if_index);
1413   if (!hw)
1414     {
1415       return clib_error_return (0,
1416                                 "unable to find hw interface for index %u",
1417                                 hw_if_index);
1418     }
1419
1420   old_name = hw->name;
1421
1422   /* set new hw->name */
1423   hw->name = format (0, "%s", new_name);
1424
1425   /* remove the old name to hw_if_index mapping and install the new one */
1426   hash_unset_mem (im->hw_interface_by_name, old_name);
1427   hash_set_mem (im->hw_interface_by_name, hw->name, hw_if_index);
1428
1429   /* rename tx/output nodes */
1430   vlib_node_rename (vm, hw->tx_node_index, "%v-tx", hw->name);
1431   vlib_node_rename (vm, hw->output_node_index, "%v-output", hw->name);
1432
1433   /* free the old name vector */
1434   vec_free (old_name);
1435
1436   return error;
1437 }
1438
1439 clib_error_t *
1440 vnet_hw_interface_add_del_mac_address (vnet_main_t * vnm,
1441                                        u32 hw_if_index,
1442                                        const u8 * mac_address, u8 is_add)
1443 {
1444   clib_error_t *error = 0;
1445   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1446
1447   vnet_device_class_t *dev_class =
1448     vnet_get_device_class (vnm, hi->dev_class_index);
1449
1450   if (!hi->hw_address)
1451     {
1452       error =
1453         clib_error_return
1454         (0, "Secondary MAC Addresses not supported for interface index %u",
1455          hw_if_index);
1456       goto done;
1457     }
1458
1459   if (dev_class->mac_addr_add_del_function)
1460     error = dev_class->mac_addr_add_del_function (hi, mac_address, is_add);
1461
1462   if (!error)
1463     {
1464       vnet_hw_interface_class_t *hw_class;
1465
1466       hw_class = vnet_get_hw_interface_class (vnm, hi->hw_class_index);
1467
1468       if (NULL != hw_class->mac_addr_add_del_function)
1469         error = hw_class->mac_addr_add_del_function (hi, mac_address, is_add);
1470     }
1471
1472   /* If no errors, add to the list of secondary MACs on the ethernet intf */
1473   if (!error)
1474     ethernet_interface_add_del_address (&ethernet_main, hw_if_index,
1475                                         mac_address, is_add);
1476
1477 done:
1478   return error;
1479 }
1480
1481 static clib_error_t *
1482 vnet_hw_interface_change_mac_address_helper (vnet_main_t * vnm,
1483                                              u32 hw_if_index,
1484                                              const u8 * mac_address)
1485 {
1486   clib_error_t *error = 0;
1487   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1488
1489   if (hi->hw_address)
1490     {
1491       u8 *old_address = vec_dup (hi->hw_address);
1492       vnet_device_class_t *dev_class =
1493         vnet_get_device_class (vnm, hi->dev_class_index);
1494       if (dev_class->mac_addr_change_function)
1495         {
1496           error =
1497             dev_class->mac_addr_change_function (hi, old_address,
1498                                                  mac_address);
1499         }
1500       if (!error)
1501         {
1502           vnet_hw_interface_class_t *hw_class;
1503
1504           hw_class = vnet_get_hw_interface_class (vnm, hi->hw_class_index);
1505
1506           if (NULL != hw_class->mac_addr_change_function)
1507             hw_class->mac_addr_change_function (hi, old_address, mac_address);
1508         }
1509       else
1510         {
1511           error =
1512             clib_error_return (0,
1513                                "MAC Address Change is not supported on this interface");
1514         }
1515       vec_free (old_address);
1516     }
1517   else
1518     {
1519       error =
1520         clib_error_return (0,
1521                            "mac address change is not supported for interface index %u",
1522                            hw_if_index);
1523     }
1524   return error;
1525 }
1526
1527 clib_error_t *
1528 vnet_hw_interface_change_mac_address (vnet_main_t * vnm, u32 hw_if_index,
1529                                       const u8 * mac_address)
1530 {
1531   return vnet_hw_interface_change_mac_address_helper
1532     (vnm, hw_if_index, mac_address);
1533 }
1534
1535 /* update the unnumbered state of an interface*/
1536 void
1537 vnet_sw_interface_update_unnumbered (u32 unnumbered_sw_if_index,
1538                                      u32 ip_sw_if_index, u8 enable)
1539 {
1540   vnet_main_t *vnm = vnet_get_main ();
1541   vnet_sw_interface_t *si;
1542   u32 was_unnum;
1543
1544   si = vnet_get_sw_interface (vnm, unnumbered_sw_if_index);
1545   was_unnum = (si->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED);
1546
1547   if (enable)
1548     {
1549       si->flags |= VNET_SW_INTERFACE_FLAG_UNNUMBERED;
1550       si->unnumbered_sw_if_index = ip_sw_if_index;
1551
1552       ip4_main.lookup_main.if_address_pool_index_by_sw_if_index
1553         [unnumbered_sw_if_index] =
1554         ip4_main.
1555         lookup_main.if_address_pool_index_by_sw_if_index[ip_sw_if_index];
1556       ip6_main.
1557         lookup_main.if_address_pool_index_by_sw_if_index
1558         [unnumbered_sw_if_index] =
1559         ip6_main.
1560         lookup_main.if_address_pool_index_by_sw_if_index[ip_sw_if_index];
1561     }
1562   else
1563     {
1564       si->flags &= ~(VNET_SW_INTERFACE_FLAG_UNNUMBERED);
1565       si->unnumbered_sw_if_index = (u32) ~ 0;
1566
1567       ip4_main.lookup_main.if_address_pool_index_by_sw_if_index
1568         [unnumbered_sw_if_index] = ~0;
1569       ip6_main.lookup_main.if_address_pool_index_by_sw_if_index
1570         [unnumbered_sw_if_index] = ~0;
1571     }
1572
1573   if (was_unnum != (si->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED))
1574     {
1575       ip4_sw_interface_enable_disable (unnumbered_sw_if_index, enable);
1576       ip6_sw_interface_enable_disable (unnumbered_sw_if_index, enable);
1577     }
1578 }
1579
1580 vnet_l3_packet_type_t
1581 vnet_link_to_l3_proto (vnet_link_t link)
1582 {
1583   switch (link)
1584     {
1585     case VNET_LINK_IP4:
1586       return (VNET_L3_PACKET_TYPE_IP4);
1587     case VNET_LINK_IP6:
1588       return (VNET_L3_PACKET_TYPE_IP6);
1589     case VNET_LINK_MPLS:
1590       return (VNET_L3_PACKET_TYPE_MPLS);
1591     case VNET_LINK_ARP:
1592       return (VNET_L3_PACKET_TYPE_ARP);
1593     case VNET_LINK_ETHERNET:
1594     case VNET_LINK_NSH:
1595       ASSERT (0);
1596       break;
1597     }
1598   ASSERT (0);
1599   return (0);
1600 }
1601
1602 vnet_mtu_t
1603 vnet_link_to_mtu (vnet_link_t link)
1604 {
1605   switch (link)
1606     {
1607     case VNET_LINK_IP4:
1608       return (VNET_MTU_IP4);
1609     case VNET_LINK_IP6:
1610       return (VNET_MTU_IP6);
1611     case VNET_LINK_MPLS:
1612       return (VNET_MTU_MPLS);
1613     default:
1614       return (VNET_MTU_L3);
1615     }
1616 }
1617
1618 u8 *
1619 default_build_rewrite (vnet_main_t * vnm,
1620                        u32 sw_if_index,
1621                        vnet_link_t link_type, const void *dst_address)
1622 {
1623   return (NULL);
1624 }
1625
1626 void
1627 default_update_adjacency (vnet_main_t * vnm, u32 sw_if_index, u32 ai)
1628 {
1629   ip_adjacency_t *adj;
1630
1631   adj = adj_get (ai);
1632
1633   switch (adj->lookup_next_index)
1634     {
1635     case IP_LOOKUP_NEXT_GLEAN:
1636       adj_glean_update_rewrite (ai);
1637       break;
1638     case IP_LOOKUP_NEXT_ARP:
1639     case IP_LOOKUP_NEXT_BCAST:
1640       /*
1641        * default rewrite in neighbour adj
1642        */
1643       adj_nbr_update_rewrite
1644         (ai,
1645          ADJ_NBR_REWRITE_FLAG_COMPLETE,
1646          vnet_build_rewrite_for_sw_interface (vnm,
1647                                               sw_if_index,
1648                                               adj_get_link_type (ai), NULL));
1649       break;
1650     case IP_LOOKUP_NEXT_MCAST:
1651       /*
1652        * mcast traffic also uses default rewrite string with no mcast
1653        * switch time updates.
1654        */
1655       adj_mcast_update_rewrite
1656         (ai,
1657          vnet_build_rewrite_for_sw_interface (vnm,
1658                                               sw_if_index,
1659                                               adj_get_link_type (ai),
1660                                               NULL), 0);
1661       break;
1662     case IP_LOOKUP_NEXT_DROP:
1663     case IP_LOOKUP_NEXT_PUNT:
1664     case IP_LOOKUP_NEXT_LOCAL:
1665     case IP_LOOKUP_NEXT_REWRITE:
1666     case IP_LOOKUP_NEXT_MCAST_MIDCHAIN:
1667     case IP_LOOKUP_NEXT_MIDCHAIN:
1668     case IP_LOOKUP_NEXT_ICMP_ERROR:
1669     case IP_LOOKUP_N_NEXT:
1670       ASSERT (0);
1671       break;
1672     }
1673 }
1674
1675 int collect_detailed_interface_stats_flag = 0;
1676
1677 void
1678 collect_detailed_interface_stats_flag_set (void)
1679 {
1680   collect_detailed_interface_stats_flag = 1;
1681 }
1682
1683 void
1684 collect_detailed_interface_stats_flag_clear (void)
1685 {
1686   collect_detailed_interface_stats_flag = 0;
1687 }
1688
1689 static clib_error_t *
1690 collect_detailed_interface_stats_cli (vlib_main_t * vm,
1691                                       unformat_input_t * input,
1692                                       vlib_cli_command_t * cmd)
1693 {
1694   unformat_input_t _line_input, *line_input = &_line_input;
1695   clib_error_t *error = NULL;
1696
1697   /* Get a line of input. */
1698   if (!unformat_user (input, unformat_line_input, line_input))
1699     return clib_error_return (0, "expected enable | disable");
1700
1701   while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
1702     {
1703       if (unformat (line_input, "enable") || unformat (line_input, "on"))
1704         collect_detailed_interface_stats_flag_set ();
1705       else if (unformat (line_input, "disable")
1706                || unformat (line_input, "off"))
1707         collect_detailed_interface_stats_flag_clear ();
1708       else
1709         {
1710           error = clib_error_return (0, "unknown input `%U'",
1711                                      format_unformat_error, line_input);
1712           goto done;
1713         }
1714     }
1715
1716 done:
1717   unformat_free (line_input);
1718   return error;
1719 }
1720
1721 /* *INDENT-OFF* */
1722 VLIB_CLI_COMMAND (collect_detailed_interface_stats_command, static) = {
1723   .path = "interface collect detailed-stats",
1724   .short_help = "interface collect detailed-stats <enable|disable>",
1725   .function = collect_detailed_interface_stats_cli,
1726 };
1727 /* *INDENT-ON* */
1728
1729 /*
1730  * fd.io coding-style-patch-verification: ON
1731  *
1732  * Local Variables:
1733  * eval: (c-set-style "gnu")
1734  * End:
1735  */