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   if (template->sub.eth.flags.two_tags == 1
 586       && template->sub.eth.flags.exact_match == 1
 587       && (template->sub.eth.flags.inner_vlan_id_any == 1
 588           || template->sub.eth.flags.outer_vlan_id_any == 1))
 589     {
 590       error = clib_error_return (0,
 591                                  "inner-dot1q any exact-match is unsupported");
 592       return error;
 593     }
 594
 595   hi = vnet_get_sup_hw_interface (vnm, template->sup_sw_if_index);
 596   dev_class = vnet_get_device_class (vnm, hi->dev_class_index);
 597
 598   if (template->type == VNET_SW_INTERFACE_TYPE_SUB &&
 599       dev_class->subif_add_del_function)
 600     {
 601       error = dev_class->subif_add_del_function (vnm, hi->hw_if_index,
 602                                                  (struct vnet_sw_interface_t
 603                                                   *) template, 1);
 604       if (error)
 605         return error;
 606     }
 607
 608   *sw_if_index = vnet_create_sw_interface_no_callbacks (vnm, template);
 609   error = vnet_sw_interface_set_flags_helper
 610     (vnm, *sw_if_index, template->flags,
 611      VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE);
 612
 613   if (error)
 614     {
 615       /* undo the work done by vnet_create_sw_interface_no_callbacks() */
 616       vnet_interface_main_t *im = &vnm->interface_main;
 617       vnet_sw_interface_t *sw =
 618         pool_elt_at_index (im->sw_interfaces, *sw_if_index);
 619       pool_put (im->sw_interfaces, sw);
 620     }
 621
 622   return error;
 623 }
 624
 625 void
 626 vnet_delete_sw_interface (vnet_main_t * vnm, u32 sw_if_index)
 627 {
 628   vnet_interface_main_t *im = &vnm->interface_main;
 629   vnet_sw_interface_t *sw =
 630     pool_elt_at_index (im->sw_interfaces, sw_if_index);
 631
 632   /* Check if the interface has config and is removed from L2 BD or XConnect */
 633   vlib_main_t *vm = vlib_get_main ();
 634   l2_input_config_t *config;
 635   if (sw_if_index < vec_len (l2input_main.configs))
 636     {
 637       config = vec_elt_at_index (l2input_main.configs, sw_if_index);
 638       if (config->xconnect)
 639         set_int_l2_mode (vm, vnm, MODE_L3, config->output_sw_if_index, 0,
 640                          L2_BD_PORT_TYPE_NORMAL, 0, 0);
 641       if (config->xconnect || config->bridge)
 642         set_int_l2_mode (vm, vnm, MODE_L3, sw_if_index, 0,
 643                          L2_BD_PORT_TYPE_NORMAL, 0, 0);
 644     }
 645   vnet_clear_sw_interface_tag (vnm, sw_if_index);
 646
 647   /* Bring down interface in case it is up. */
 648   if (sw->flags != 0)
 649     vnet_sw_interface_set_flags (vnm, sw_if_index, /* flags */ 0);
 650
 651   call_sw_interface_add_del_callbacks (vnm, sw_if_index, /* is_create */ 0);
 652
 653   pool_put (im->sw_interfaces, sw);
 654 }
 655
 656 static clib_error_t *
 657 call_sw_interface_mtu_change_callbacks (vnet_main_t * vnm, u32 sw_if_index)
 658 {
 659   return call_elf_section_interface_callbacks
 660     (vnm, sw_if_index, 0, vnm->sw_interface_mtu_change_functions);
 661 }
 662
 663 void
 664 vnet_sw_interface_set_mtu (vnet_main_t * vnm, u32 sw_if_index, u32 mtu)
 665 {
 666   vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
 667
 668   if (si->mtu[VNET_MTU_L3] != mtu)
 669     {
 670       si->mtu[VNET_MTU_L3] = mtu;
 671       call_sw_interface_mtu_change_callbacks (vnm, sw_if_index);
 672     }
 673 }
 674
 675 void
 676 vnet_sw_interface_set_protocol_mtu (vnet_main_t * vnm, u32 sw_if_index,
 677                                     u32 mtu[])
 678 {
 679   vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
 680   bool changed = false;
 681   int i;
 682
 683   for (i = 0; i < VNET_N_MTU; i++)
 684     {
 685       if (si->mtu[i] != mtu[i])
 686         {
 687           si->mtu[i] = mtu[i];
 688           changed = true;
 689         }
 690     }
 691   /* Notify interested parties */
 692   if (changed)
 693     call_sw_interface_mtu_change_callbacks (vnm, sw_if_index);
 694 }
 695
 696 void
 697 vnet_sw_interface_ip_directed_broadcast (vnet_main_t * vnm,
 698                                          u32 sw_if_index, u8 enable)
 699 {
 700   vnet_sw_interface_t *si;
 701
 702   si = vnet_get_sw_interface (vnm, sw_if_index);
 703
 704   if (enable)
 705     si->flags |= VNET_SW_INTERFACE_FLAG_DIRECTED_BCAST;
 706   else
 707     si->flags &= ~VNET_SW_INTERFACE_FLAG_DIRECTED_BCAST;
 708
 709   ip4_directed_broadcast (sw_if_index, enable);
 710 }
 711
 712 /*
 713  * Reflect a change in hardware MTU on protocol MTUs
 714  */
 715 static walk_rc_t
 716 sw_interface_walk_callback (vnet_main_t * vnm, u32 sw_if_index, void *ctx)
 717 {
 718   u32 *link_mtu = ctx;
 719   vnet_sw_interface_set_mtu (vnm, sw_if_index, *link_mtu);
 720   return WALK_CONTINUE;
 721 }
 722
 723 void
 724 vnet_hw_interface_set_mtu (vnet_main_t * vnm, u32 hw_if_index, u32 mtu)
 725 {
 726   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
 727
 728   if (hi->max_packet_bytes != mtu)
 729     {
 730       hi->max_packet_bytes = mtu;
 731       ethernet_set_flags (vnm, hw_if_index, ETHERNET_INTERFACE_FLAG_MTU);
 732       vnet_hw_interface_walk_sw (vnm, hw_if_index, sw_interface_walk_callback,
 733                                  &mtu);
 734     }
 735 }
 736
 737 static void
 738 setup_tx_node (vlib_main_t * vm,
 739                u32 node_index, vnet_device_class_t * dev_class)
 740 {
 741   vlib_node_t *n = vlib_get_node (vm, node_index);
 742
 743   n->function = dev_class->tx_function;
 744   n->format_trace = dev_class->format_tx_trace;
 745
 746   vlib_register_errors (vm, node_index,
 747                         dev_class->tx_function_n_errors,
 748                         dev_class->tx_function_error_strings);
 749 }
 750
 751 static void
 752 setup_output_node (vlib_main_t * vm,
 753                    u32 node_index, vnet_hw_interface_class_t * hw_class)
 754 {
 755   vlib_node_t *n = vlib_get_node (vm, node_index);
 756   n->format_buffer = hw_class->format_header;
 757   n->unformat_buffer = hw_class->unformat_header;
 758 }
 759
 760 /* Register an interface instance. */
 761 u32
 762 vnet_register_interface (vnet_main_t * vnm,
 763                          u32 dev_class_index,
 764                          u32 dev_instance,
 765                          u32 hw_class_index, u32 hw_instance)
 766 {
 767   vnet_interface_main_t *im = &vnm->interface_main;
 768   vnet_hw_interface_t *hw;
 769   vnet_device_class_t *dev_class =
 770     vnet_get_device_class (vnm, dev_class_index);
 771   vnet_hw_interface_class_t *hw_class =
 772     vnet_get_hw_interface_class (vnm, hw_class_index);
 773   vlib_main_t *vm = vnm->vlib_main;
 774   vnet_feature_config_main_t *fcm;
 775   vnet_config_main_t *cm;
 776   u32 hw_index, i;
 777   char *tx_node_name = NULL, *output_node_name = NULL;
 778
 779   pool_get (im->hw_interfaces, hw);
 780   clib_memset (hw, 0, sizeof (*hw));
 781   hw->trace_classify_table_index = ~0;
 782
 783   hw_index = hw - im->hw_interfaces;
 784   hw->hw_if_index = hw_index;
 785   hw->default_rx_mode = VNET_HW_INTERFACE_RX_MODE_POLLING;
 786
 787   if (dev_class->format_device_name)
 788     hw->name = format (0, "%U", dev_class->format_device_name, dev_instance);
 789   else if (hw_class->format_interface_name)
 790     hw->name = format (0, "%U", hw_class->format_interface_name,
 791                        dev_instance);
 792   else
 793     hw->name = format (0, "%s%x", hw_class->name, dev_instance);
 794
 795   if (!im->hw_interface_by_name)
 796     im->hw_interface_by_name = hash_create_vec ( /* size */ 0,
 797                                                 sizeof (hw->name[0]),
 798                                                 sizeof (uword));
 799
 800   hash_set_mem (im->hw_interface_by_name, hw->name, hw_index);
 801
 802   /* Make hardware interface point to software interface. */
 803   {
 804     vnet_sw_interface_t sw = {
 805       .type = VNET_SW_INTERFACE_TYPE_HARDWARE,
 806       .flood_class = VNET_FLOOD_CLASS_NORMAL,
 807       .hw_if_index = hw_index
 808     };
 809     hw->sw_if_index = vnet_create_sw_interface_no_callbacks (vnm, &sw);
 810   }
 811
 812   hw->dev_class_index = dev_class_index;
 813   hw->dev_instance = dev_instance;
 814   hw->hw_class_index = hw_class_index;
 815   hw->hw_instance = hw_instance;
 816
 817   hw->max_rate_bits_per_sec = 0;
 818   hw->min_packet_bytes = 0;
 819   vnet_sw_interface_set_mtu (vnm, hw->sw_if_index, 0);
 820
 821   if (dev_class->tx_function == 0)
 822     goto no_output_nodes;       /* No output/tx nodes to create */
 823
 824   tx_node_name = (char *) format (0, "%v-tx", hw->name);
 825   output_node_name = (char *) format (0, "%v-output", hw->name);
 826
 827   /* If we have previously deleted interface nodes, re-use them. */
 828   if (vec_len (im->deleted_hw_interface_nodes) > 0)
 829     {
 830       vnet_hw_interface_nodes_t *hn;
 831       vlib_node_t *node;
 832       vlib_node_runtime_t *nrt;
 833
 834       hn = vec_end (im->deleted_hw_interface_nodes) - 1;
 835
 836       hw->tx_node_index = hn->tx_node_index;
 837       hw->output_node_index = hn->output_node_index;
 838
 839       vlib_node_rename (vm, hw->tx_node_index, "%v", tx_node_name);
 840       vlib_node_rename (vm, hw->output_node_index, "%v", output_node_name);
 841
 842       /* *INDENT-OFF* */
 843       foreach_vlib_main ({
 844         vnet_interface_output_runtime_t *rt;
 845
 846         rt = vlib_node_get_runtime_data (this_vlib_main, hw->output_node_index);
 847         ASSERT (rt->is_deleted == 1);
 848         rt->is_deleted = 0;
 849         rt->hw_if_index = hw_index;
 850         rt->sw_if_index = hw->sw_if_index;
 851         rt->dev_instance = hw->dev_instance;
 852
 853         rt = vlib_node_get_runtime_data (this_vlib_main, hw->tx_node_index);
 854         rt->hw_if_index = hw_index;
 855         rt->sw_if_index = hw->sw_if_index;
 856         rt->dev_instance = hw->dev_instance;
 857       });
 858       /* *INDENT-ON* */
 859
 860       /* The new class may differ from the old one.
 861        * Functions have to be updated. */
 862       node = vlib_get_node (vm, hw->output_node_index);
 863       node->function = vnet_interface_output_node;
 864       node->format_trace = format_vnet_interface_output_trace;
 865       /* *INDENT-OFF* */
 866       foreach_vlib_main ({
 867         nrt = vlib_node_get_runtime (this_vlib_main, hw->output_node_index);
 868         nrt->function = node->function;
 869       });
 870       /* *INDENT-ON* */
 871
 872       node = vlib_get_node (vm, hw->tx_node_index);
 873       node->function = dev_class->tx_function;
 874       node->format_trace = dev_class->format_tx_trace;
 875       /* *INDENT-OFF* */
 876       foreach_vlib_main ({
 877         nrt = vlib_node_get_runtime (this_vlib_main, hw->tx_node_index);
 878         nrt->function = node->function;
 879       });
 880       /* *INDENT-ON* */
 881
 882       _vec_len (im->deleted_hw_interface_nodes) -= 1;
 883     }
 884   else
 885     {
 886       vlib_node_registration_t r;
 887       vnet_interface_output_runtime_t rt = {
 888         .hw_if_index = hw_index,
 889         .sw_if_index = hw->sw_if_index,
 890         .dev_instance = hw->dev_instance,
 891         .is_deleted = 0,
 892       };
 893
 894       clib_memset (&r, 0, sizeof (r));
 895       r.type = VLIB_NODE_TYPE_INTERNAL;
 896       r.runtime_data = &rt;
 897       r.runtime_data_bytes = sizeof (rt);
 898       r.scalar_size = 0;
 899       r.vector_size = sizeof (u32);
 900
 901       r.flags = VLIB_NODE_FLAG_IS_OUTPUT;
 902       r.name = tx_node_name;
 903       r.function = dev_class->tx_function;
 904
 905       hw->tx_node_index = vlib_register_node (vm, &r);
 906
 907       vlib_node_add_named_next_with_slot (vm, hw->tx_node_index,
 908                                           "error-drop",
 909                                           VNET_INTERFACE_TX_NEXT_DROP);
 910
 911       r.flags = 0;
 912       r.name = output_node_name;
 913       r.function = vnet_interface_output_node;
 914       r.format_trace = format_vnet_interface_output_trace;
 915
 916       {
 917         static char *e[] = {
 918           "interface is down",
 919           "interface is deleted",
 920           "no buffers to segment GSO",
 921         };
 922
 923         r.n_errors = ARRAY_LEN (e);
 924         r.error_strings = e;
 925       }
 926       hw->output_node_index = vlib_register_node (vm, &r);
 927
 928       vlib_node_add_named_next_with_slot (vm, hw->output_node_index,
 929                                           "error-drop",
 930                                           VNET_INTERFACE_OUTPUT_NEXT_DROP);
 931       vlib_node_add_next_with_slot (vm, hw->output_node_index,
 932                                     hw->tx_node_index,
 933                                     VNET_INTERFACE_OUTPUT_NEXT_TX);
 934
 935       /* add interface to the list of "output-interface" feature arc start nodes
 936          and clone nexts from 1st interface if it exists */
 937       fcm = vnet_feature_get_config_main (im->output_feature_arc_index);
 938       cm = &fcm->config_main;
 939       i = vec_len (cm->start_node_indices);
 940       vec_validate (cm->start_node_indices, i);
 941       cm->start_node_indices[i] = hw->output_node_index;
 942       if (hw_index)
 943         {
 944           /* copy nexts from 1st interface */
 945           vnet_hw_interface_t *first_hw;
 946           vlib_node_t *first_node;
 947
 948           first_hw = vnet_get_hw_interface (vnm, /* hw_if_index */ 0);
 949           first_node = vlib_get_node (vm, first_hw->output_node_index);
 950
 951           /* 1st 2 nexts are already added above */
 952           for (i = 2; i < vec_len (first_node->next_nodes); i++)
 953             vlib_node_add_next_with_slot (vm, hw->output_node_index,
 954                                           first_node->next_nodes[i], i);
 955         }
 956     }
 957
 958   setup_output_node (vm, hw->output_node_index, hw_class);
 959   setup_tx_node (vm, hw->tx_node_index, dev_class);
 960
 961 no_output_nodes:
 962   /* Call all up/down callbacks with zero flags when interface is created. */
 963   vnet_sw_interface_set_flags_helper (vnm, hw->sw_if_index, /* flags */ 0,
 964                                       VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE);
 965   vnet_hw_interface_set_flags_helper (vnm, hw_index, /* flags */ 0,
 966                                       VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE);
 967   vec_free (tx_node_name);
 968   vec_free (output_node_name);
 969
 970   return hw_index;
 971 }
 972
 973 void
 974 vnet_delete_hw_interface (vnet_main_t * vnm, u32 hw_if_index)
 975 {
 976   vnet_interface_main_t *im = &vnm->interface_main;
 977   vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
 978   vlib_main_t *vm = vnm->vlib_main;
 979   vnet_device_class_t *dev_class = vnet_get_device_class (vnm,
 980                                                           hw->dev_class_index);
 981   /* If it is up, mark it down. */
 982   if (hw->flags != 0)
 983     vnet_hw_interface_set_flags (vnm, hw_if_index, /* flags */ 0);
 984
 985   /* Call delete callbacks. */
 986   call_hw_interface_add_del_callbacks (vnm, hw_if_index, /* is_create */ 0);
 987
 988   /* Delete any sub-interfaces. */
 989   {
 990     u32 id, sw_if_index;
 991     /* *INDENT-OFF* */
 992     hash_foreach (id, sw_if_index, hw->sub_interface_sw_if_index_by_id,
 993     ({
 994       vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
 995       u64 sup_and_sub_key =
 996         ((u64) (si->sup_sw_if_index) << 32) | (u64) si->sub.id;
 997       hash_unset_mem_free (&im->sw_if_index_by_sup_and_sub, &sup_and_sub_key);
 998       vnet_delete_sw_interface (vnm, sw_if_index);
 999     }));
1000     hash_free (hw->sub_interface_sw_if_index_by_id);
1001     /* *INDENT-ON* */
1002   }
1003
1004   /* Delete software interface corresponding to hardware interface. */
1005   vnet_delete_sw_interface (vnm, hw->sw_if_index);
1006
1007   if (dev_class->tx_function)
1008     {
1009       /* Put output/tx nodes into recycle pool */
1010       vnet_hw_interface_nodes_t *dn;
1011
1012       /* *INDENT-OFF* */
1013       foreach_vlib_main
1014         ({
1015           vnet_interface_output_runtime_t *rt =
1016             vlib_node_get_runtime_data (this_vlib_main, hw->output_node_index);
1017
1018           /* Mark node runtime as deleted so output node (if called)
1019            * will drop packets. */
1020           rt->is_deleted = 1;
1021         });
1022       /* *INDENT-ON* */
1023
1024       vlib_node_rename (vm, hw->output_node_index,
1025                         "interface-%d-output-deleted", hw_if_index);
1026       vlib_node_rename (vm, hw->tx_node_index, "interface-%d-tx-deleted",
1027                         hw_if_index);
1028       vec_add2 (im->deleted_hw_interface_nodes, dn, 1);
1029       dn->tx_node_index = hw->tx_node_index;
1030       dn->output_node_index = hw->output_node_index;
1031     }
1032
1033   hash_unset_mem (im->hw_interface_by_name, hw->name);
1034   vec_free (hw->name);
1035   vec_free (hw->hw_address);
1036   vec_free (hw->input_node_thread_index_by_queue);
1037   vec_free (hw->dq_runtime_index_by_queue);
1038
1039   pool_put (im->hw_interfaces, hw);
1040 }
1041
1042 void
1043 vnet_hw_interface_walk_sw (vnet_main_t * vnm,
1044                            u32 hw_if_index,
1045                            vnet_hw_sw_interface_walk_t fn, void *ctx)
1046 {
1047   vnet_hw_interface_t *hi;
1048   u32 id, sw_if_index;
1049
1050   hi = vnet_get_hw_interface (vnm, hw_if_index);
1051   /* the super first, then the sub interfaces */
1052   if (WALK_STOP == fn (vnm, hi->sw_if_index, ctx))
1053     return;
1054
1055   /* *INDENT-OFF* */
1056   hash_foreach (id, sw_if_index,
1057                 hi->sub_interface_sw_if_index_by_id,
1058   ({
1059     if (WALK_STOP == fn (vnm, sw_if_index, ctx))
1060       break;
1061   }));
1062   /* *INDENT-ON* */
1063 }
1064
1065 void
1066 vnet_hw_interface_walk (vnet_main_t * vnm,
1067                         vnet_hw_interface_walk_t fn, void *ctx)
1068 {
1069   vnet_interface_main_t *im;
1070   vnet_hw_interface_t *hi;
1071
1072   im = &vnm->interface_main;
1073
1074   /* *INDENT-OFF* */
1075   pool_foreach (hi, im->hw_interfaces,
1076   ({
1077     if (WALK_STOP == fn(vnm, hi->hw_if_index, ctx))
1078       break;
1079   }));
1080   /* *INDENT-ON* */
1081 }
1082
1083 void
1084 vnet_sw_interface_walk (vnet_main_t * vnm,
1085                         vnet_sw_interface_walk_t fn, void *ctx)
1086 {
1087   vnet_interface_main_t *im;
1088   vnet_sw_interface_t *si;
1089
1090   im = &vnm->interface_main;
1091
1092   /* *INDENT-OFF* */
1093   pool_foreach (si, im->sw_interfaces,
1094   {
1095     if (WALK_STOP == fn (vnm, si, ctx))
1096       break;
1097   });
1098   /* *INDENT-ON* */
1099 }
1100
1101 void
1102 vnet_hw_interface_init_for_class (vnet_main_t * vnm, u32 hw_if_index,
1103                                   u32 hw_class_index, u32 hw_instance)
1104 {
1105   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1106   vnet_hw_interface_class_t *hc =
1107     vnet_get_hw_interface_class (vnm, hw_class_index);
1108
1109   hi->hw_class_index = hw_class_index;
1110   hi->hw_instance = hw_instance;
1111   setup_output_node (vnm->vlib_main, hi->output_node_index, hc);
1112 }
1113
1114 static clib_error_t *
1115 vnet_hw_interface_set_class_helper (vnet_main_t * vnm, u32 hw_if_index,
1116                                     u32 hw_class_index, u32 redistribute)
1117 {
1118   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1119   vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, hi->sw_if_index);
1120   vnet_hw_interface_class_t *old_class =
1121     vnet_get_hw_interface_class (vnm, hi->hw_class_index);
1122   vnet_hw_interface_class_t *new_class =
1123     vnet_get_hw_interface_class (vnm, hw_class_index);
1124   vnet_device_class_t *dev_class =
1125     vnet_get_device_class (vnm, hi->dev_class_index);
1126   clib_error_t *error = 0;
1127
1128   /* New class equals old class?  Nothing to do. */
1129   if (hi->hw_class_index == hw_class_index)
1130     return 0;
1131
1132   /* No need (and incorrect since admin up flag may be set) to do error checking when
1133      receiving unserialize message. */
1134   if (redistribute)
1135     {
1136       if (si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
1137         return clib_error_return (0,
1138                                   "%v must be admin down to change class from %s to %s",
1139                                   hi->name, old_class->name, new_class->name);
1140
1141       /* Make sure interface supports given class. */
1142       if ((new_class->is_valid_class_for_interface
1143            && !new_class->is_valid_class_for_interface (vnm, hw_if_index,
1144                                                         hw_class_index))
1145           || (dev_class->is_valid_class_for_interface
1146               && !dev_class->is_valid_class_for_interface (vnm, hw_if_index,
1147                                                            hw_class_index)))
1148         return clib_error_return (0,
1149                                   "%v class cannot be changed from %s to %s",
1150                                   hi->name, old_class->name, new_class->name);
1151
1152     }
1153
1154   if (old_class->hw_class_change)
1155     old_class->hw_class_change (vnm, hw_if_index, old_class->index,
1156                                 new_class->index);
1157
1158   vnet_hw_interface_init_for_class (vnm, hw_if_index, new_class->index,
1159                                     /* instance */ ~0);
1160
1161   if (new_class->hw_class_change)
1162     new_class->hw_class_change (vnm, hw_if_index, old_class->index,
1163                                 new_class->index);
1164
1165   if (dev_class->hw_class_change)
1166     dev_class->hw_class_change (vnm, hw_if_index, new_class->index);
1167
1168   return error;
1169 }
1170
1171 clib_error_t *
1172 vnet_hw_interface_set_class (vnet_main_t * vnm, u32 hw_if_index,
1173                              u32 hw_class_index)
1174 {
1175   return vnet_hw_interface_set_class_helper (vnm, hw_if_index, hw_class_index,
1176                                              /* redistribute */ 1);
1177 }
1178
1179 static int
1180 vnet_hw_interface_rx_redirect_to_node_helper (vnet_main_t * vnm,
1181                                               u32 hw_if_index,
1182                                               u32 node_index,
1183                                               u32 redistribute)
1184 {
1185   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1186   vnet_device_class_t *dev_class = vnet_get_device_class
1187     (vnm, hi->dev_class_index);
1188
1189   if (dev_class->rx_redirect_to_node)
1190     {
1191       dev_class->rx_redirect_to_node (vnm, hw_if_index, node_index);
1192       return 0;
1193     }
1194
1195   return VNET_API_ERROR_UNIMPLEMENTED;
1196 }
1197
1198 int
1199 vnet_hw_interface_rx_redirect_to_node (vnet_main_t * vnm, u32 hw_if_index,
1200                                        u32 node_index)
1201 {
1202   return vnet_hw_interface_rx_redirect_to_node_helper (vnm, hw_if_index,
1203                                                        node_index,
1204                                                        1 /* redistribute */ );
1205 }
1206
1207 word
1208 vnet_sw_interface_compare (vnet_main_t * vnm,
1209                            uword sw_if_index0, uword sw_if_index1)
1210 {
1211   vnet_sw_interface_t *sup0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1212   vnet_sw_interface_t *sup1 = vnet_get_sup_sw_interface (vnm, sw_if_index1);
1213   vnet_hw_interface_t *h0 = vnet_get_hw_interface (vnm, sup0->hw_if_index);
1214   vnet_hw_interface_t *h1 = vnet_get_hw_interface (vnm, sup1->hw_if_index);
1215
1216   if (h0 != h1)
1217     return vec_cmp (h0->name, h1->name);
1218   return (word) h0->hw_instance - (word) h1->hw_instance;
1219 }
1220
1221 word
1222 vnet_hw_interface_compare (vnet_main_t * vnm,
1223                            uword hw_if_index0, uword hw_if_index1)
1224 {
1225   vnet_hw_interface_t *h0 = vnet_get_hw_interface (vnm, hw_if_index0);
1226   vnet_hw_interface_t *h1 = vnet_get_hw_interface (vnm, hw_if_index1);
1227
1228   if (h0 != h1)
1229     return vec_cmp (h0->name, h1->name);
1230   return (word) h0->hw_instance - (word) h1->hw_instance;
1231 }
1232
1233 int
1234 vnet_sw_interface_is_p2p (vnet_main_t * vnm, u32 sw_if_index)
1235 {
1236   vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
1237   if ((si->type == VNET_SW_INTERFACE_TYPE_P2P) ||
1238       (si->type == VNET_SW_INTERFACE_TYPE_PIPE))
1239     return 1;
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_P2P);
1246 }
1247
1248 int
1249 vnet_sw_interface_is_nbma (vnet_main_t * vnm, u32 sw_if_index)
1250 {
1251   vnet_hw_interface_t *hw = vnet_get_sup_hw_interface (vnm, sw_if_index);
1252   vnet_hw_interface_class_t *hc =
1253     vnet_get_hw_interface_class (vnm, hw->hw_class_index);
1254
1255   return (hc->flags & VNET_HW_INTERFACE_CLASS_FLAG_NBMA);
1256 }
1257
1258 clib_error_t *
1259 vnet_interface_init (vlib_main_t * vm)
1260 {
1261   vnet_main_t *vnm = vnet_get_main ();
1262   vnet_interface_main_t *im = &vnm->interface_main;
1263   vlib_buffer_t *b = 0;
1264   vnet_buffer_opaque_t *o = 0;
1265   clib_error_t *error;
1266
1267   /*
1268    * Keep people from shooting themselves in the foot.
1269    */
1270   if (sizeof (b->opaque) != sizeof (vnet_buffer_opaque_t))
1271     {
1272 #define _(a) if (sizeof(o->a) > sizeof (o->unused))                     \
1273       clib_warning                                                      \
1274         ("FATAL: size of opaque union subtype %s is %d (max %d)",       \
1275          #a, sizeof(o->a), sizeof (o->unused));
1276       foreach_buffer_opaque_union_subtype;
1277 #undef _
1278
1279       return clib_error_return
1280         (0, "FATAL: size of vlib buffer opaque %d, size of vnet opaque %d",
1281          sizeof (b->opaque), sizeof (vnet_buffer_opaque_t));
1282     }
1283
1284   clib_spinlock_init (&im->sw_if_counter_lock);
1285   clib_spinlock_lock (&im->sw_if_counter_lock); /* should be no need */
1286
1287   vec_validate (im->sw_if_counters, VNET_N_SIMPLE_INTERFACE_COUNTER - 1);
1288 #define _(E,n,p)                                                        \
1289   im->sw_if_counters[VNET_INTERFACE_COUNTER_##E].name = #n;             \
1290   im->sw_if_counters[VNET_INTERFACE_COUNTER_##E].stat_segment_name = "/" #p "/" #n;
1291   foreach_simple_interface_counter_name
1292 #undef _
1293     vec_validate (im->combined_sw_if_counters,
1294                   VNET_N_COMBINED_INTERFACE_COUNTER - 1);
1295 #define _(E,n,p)                                                        \
1296   im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_##E].name = #n;    \
1297   im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_##E].stat_segment_name = "/" #p "/" #n;
1298   foreach_combined_interface_counter_name
1299 #undef _
1300     clib_spinlock_unlock (&im->sw_if_counter_lock);
1301
1302   im->device_class_by_name = hash_create_string ( /* size */ 0,
1303                                                  sizeof (uword));
1304   {
1305     vnet_device_class_t *c;
1306
1307     c = vnm->device_class_registrations;
1308
1309     while (c)
1310       {
1311         c->index = vec_len (im->device_classes);
1312         hash_set_mem (im->device_class_by_name, c->name, c->index);
1313
1314         if (c->tx_fn_registrations)
1315           {
1316             vlib_node_fn_registration_t *fnr = c->tx_fn_registrations;
1317             int priority = -1;
1318
1319             /* to avoid confusion, please remove ".tx_function" statement
1320                from VNET_DEVICE_CLASS() if using function candidates */
1321             ASSERT (c->tx_function == 0);
1322
1323             while (fnr)
1324               {
1325                 if (fnr->priority > priority)
1326                   {
1327                     priority = fnr->priority;
1328                     c->tx_function = fnr->function;
1329                   }
1330                 fnr = fnr->next_registration;
1331               }
1332           }
1333
1334         vec_add1 (im->device_classes, c[0]);
1335         c = c->next_class_registration;
1336       }
1337   }
1338
1339   im->hw_interface_class_by_name = hash_create_string ( /* size */ 0,
1340                                                        sizeof (uword));
1341
1342   im->sw_if_index_by_sup_and_sub = hash_create_mem (0, sizeof (u64),
1343                                                     sizeof (uword));
1344   {
1345     vnet_hw_interface_class_t *c;
1346
1347     c = vnm->hw_interface_class_registrations;
1348
1349     while (c)
1350       {
1351         c->index = vec_len (im->hw_interface_classes);
1352         hash_set_mem (im->hw_interface_class_by_name, c->name, c->index);
1353
1354         if (NULL == c->build_rewrite)
1355           c->build_rewrite = default_build_rewrite;
1356         if (NULL == c->update_adjacency)
1357           c->update_adjacency = default_update_adjacency;
1358
1359         vec_add1 (im->hw_interface_classes, c[0]);
1360         c = c->next_class_registration;
1361       }
1362   }
1363
1364   /* init per-thread data */
1365   vec_validate_aligned (im->per_thread_data, vlib_num_workers (),
1366                         CLIB_CACHE_LINE_BYTES);
1367
1368   if ((error = vlib_call_init_function (vm, vnet_interface_cli_init)))
1369     return error;
1370
1371   vnm->interface_tag_by_sw_if_index = hash_create (0, sizeof (uword));
1372
1373 #if VLIB_BUFFER_TRACE_TRAJECTORY > 0
1374   if ((error = vlib_call_init_function (vm, trajectory_trace_init)))
1375     return error;
1376 #endif
1377
1378   return 0;
1379 }
1380
1381 VLIB_INIT_FUNCTION (vnet_interface_init);
1382
1383 /* Kludge to renumber interface names [only!] */
1384 int
1385 vnet_interface_name_renumber (u32 sw_if_index, u32 new_show_dev_instance)
1386 {
1387   int rv;
1388   vnet_main_t *vnm = vnet_get_main ();
1389   vnet_interface_main_t *im = &vnm->interface_main;
1390   vnet_hw_interface_t *hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
1391
1392   vnet_device_class_t *dev_class = vnet_get_device_class
1393     (vnm, hi->dev_class_index);
1394
1395   if (dev_class->name_renumber == 0 || dev_class->format_device_name == 0)
1396     return VNET_API_ERROR_UNIMPLEMENTED;
1397
1398   rv = dev_class->name_renumber (hi, new_show_dev_instance);
1399
1400   if (rv)
1401     return rv;
1402
1403   hash_unset_mem (im->hw_interface_by_name, hi->name);
1404   vec_free (hi->name);
1405   /* Use the mapping we set up to call it Ishmael */
1406   hi->name = format (0, "%U", dev_class->format_device_name,
1407                      hi->dev_instance);
1408
1409   hash_set_mem (im->hw_interface_by_name, hi->name, hi->hw_if_index);
1410   return rv;
1411 }
1412
1413 clib_error_t *
1414 vnet_rename_interface (vnet_main_t * vnm, u32 hw_if_index, char *new_name)
1415 {
1416   vnet_interface_main_t *im = &vnm->interface_main;
1417   vlib_main_t *vm = vnm->vlib_main;
1418   vnet_hw_interface_t *hw;
1419   u8 *old_name;
1420   clib_error_t *error = 0;
1421
1422   hw = vnet_get_hw_interface (vnm, hw_if_index);
1423   if (!hw)
1424     {
1425       return clib_error_return (0,
1426                                 "unable to find hw interface for index %u",
1427                                 hw_if_index);
1428     }
1429
1430   old_name = hw->name;
1431
1432   /* set new hw->name */
1433   hw->name = format (0, "%s", new_name);
1434
1435   /* remove the old name to hw_if_index mapping and install the new one */
1436   hash_unset_mem (im->hw_interface_by_name, old_name);
1437   hash_set_mem (im->hw_interface_by_name, hw->name, hw_if_index);
1438
1439   /* rename tx/output nodes */
1440   vlib_node_rename (vm, hw->tx_node_index, "%v-tx", hw->name);
1441   vlib_node_rename (vm, hw->output_node_index, "%v-output", hw->name);
1442
1443   /* free the old name vector */
1444   vec_free (old_name);
1445
1446   return error;
1447 }
1448
1449 clib_error_t *
1450 vnet_hw_interface_add_del_mac_address (vnet_main_t * vnm,
1451                                        u32 hw_if_index,
1452                                        const u8 * mac_address, u8 is_add)
1453 {
1454   clib_error_t *error = 0;
1455   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1456
1457   vnet_device_class_t *dev_class =
1458     vnet_get_device_class (vnm, hi->dev_class_index);
1459
1460   if (!hi->hw_address)
1461     {
1462       error =
1463         clib_error_return
1464         (0, "Secondary MAC Addresses not supported for interface index %u",
1465          hw_if_index);
1466       goto done;
1467     }
1468
1469   if (dev_class->mac_addr_add_del_function)
1470     error = dev_class->mac_addr_add_del_function (hi, mac_address, is_add);
1471
1472   if (!error)
1473     {
1474       vnet_hw_interface_class_t *hw_class;
1475
1476       hw_class = vnet_get_hw_interface_class (vnm, hi->hw_class_index);
1477
1478       if (NULL != hw_class->mac_addr_add_del_function)
1479         error = hw_class->mac_addr_add_del_function (hi, mac_address, is_add);
1480     }
1481
1482   /* If no errors, add to the list of secondary MACs on the ethernet intf */
1483   if (!error)
1484     ethernet_interface_add_del_address (&ethernet_main, hw_if_index,
1485                                         mac_address, is_add);
1486
1487 done:
1488   return error;
1489 }
1490
1491 static clib_error_t *
1492 vnet_hw_interface_change_mac_address_helper (vnet_main_t * vnm,
1493                                              u32 hw_if_index,
1494                                              const u8 * mac_address)
1495 {
1496   clib_error_t *error = 0;
1497   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1498
1499   if (hi->hw_address)
1500     {
1501       u8 *old_address = vec_dup (hi->hw_address);
1502       vnet_device_class_t *dev_class =
1503         vnet_get_device_class (vnm, hi->dev_class_index);
1504       if (dev_class->mac_addr_change_function)
1505         {
1506           error =
1507             dev_class->mac_addr_change_function (hi, old_address,
1508                                                  mac_address);
1509         }
1510       if (!error)
1511         {
1512           vnet_hw_interface_class_t *hw_class;
1513
1514           hw_class = vnet_get_hw_interface_class (vnm, hi->hw_class_index);
1515
1516           if (NULL != hw_class->mac_addr_change_function)
1517             hw_class->mac_addr_change_function (hi, old_address, mac_address);
1518         }
1519       else
1520         {
1521           error =
1522             clib_error_return (0,
1523                                "MAC Address Change is not supported on this interface");
1524         }
1525       vec_free (old_address);
1526     }
1527   else
1528     {
1529       error =
1530         clib_error_return (0,
1531                            "mac address change is not supported for interface index %u",
1532                            hw_if_index);
1533     }
1534   return error;
1535 }
1536
1537 clib_error_t *
1538 vnet_hw_interface_change_mac_address (vnet_main_t * vnm, u32 hw_if_index,
1539                                       const u8 * mac_address)
1540 {
1541   return vnet_hw_interface_change_mac_address_helper
1542     (vnm, hw_if_index, mac_address);
1543 }
1544
1545 /* update the unnumbered state of an interface*/
1546 void
1547 vnet_sw_interface_update_unnumbered (u32 unnumbered_sw_if_index,
1548                                      u32 ip_sw_if_index, u8 enable)
1549 {
1550   vnet_main_t *vnm = vnet_get_main ();
1551   vnet_sw_interface_t *si;
1552   u32 was_unnum;
1553
1554   si = vnet_get_sw_interface (vnm, unnumbered_sw_if_index);
1555   was_unnum = (si->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED);
1556
1557   if (enable)
1558     {
1559       si->flags |= VNET_SW_INTERFACE_FLAG_UNNUMBERED;
1560       si->unnumbered_sw_if_index = ip_sw_if_index;
1561
1562       ip4_main.lookup_main.if_address_pool_index_by_sw_if_index
1563         [unnumbered_sw_if_index] =
1564         ip4_main.
1565         lookup_main.if_address_pool_index_by_sw_if_index[ip_sw_if_index];
1566       ip6_main.
1567         lookup_main.if_address_pool_index_by_sw_if_index
1568         [unnumbered_sw_if_index] =
1569         ip6_main.
1570         lookup_main.if_address_pool_index_by_sw_if_index[ip_sw_if_index];
1571     }
1572   else
1573     {
1574       si->flags &= ~(VNET_SW_INTERFACE_FLAG_UNNUMBERED);
1575       si->unnumbered_sw_if_index = (u32) ~ 0;
1576
1577       ip4_main.lookup_main.if_address_pool_index_by_sw_if_index
1578         [unnumbered_sw_if_index] = ~0;
1579       ip6_main.lookup_main.if_address_pool_index_by_sw_if_index
1580         [unnumbered_sw_if_index] = ~0;
1581     }
1582
1583   if (was_unnum != (si->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED))
1584     {
1585       ip4_sw_interface_enable_disable (unnumbered_sw_if_index, enable);
1586       ip6_sw_interface_enable_disable (unnumbered_sw_if_index, enable);
1587     }
1588 }
1589
1590 vnet_l3_packet_type_t
1591 vnet_link_to_l3_proto (vnet_link_t link)
1592 {
1593   switch (link)
1594     {
1595     case VNET_LINK_IP4:
1596       return (VNET_L3_PACKET_TYPE_IP4);
1597     case VNET_LINK_IP6:
1598       return (VNET_L3_PACKET_TYPE_IP6);
1599     case VNET_LINK_MPLS:
1600       return (VNET_L3_PACKET_TYPE_MPLS);
1601     case VNET_LINK_ARP:
1602       return (VNET_L3_PACKET_TYPE_ARP);
1603     case VNET_LINK_ETHERNET:
1604     case VNET_LINK_NSH:
1605       ASSERT (0);
1606       break;
1607     }
1608   ASSERT (0);
1609   return (0);
1610 }
1611
1612 vnet_mtu_t
1613 vnet_link_to_mtu (vnet_link_t link)
1614 {
1615   switch (link)
1616     {
1617     case VNET_LINK_IP4:
1618       return (VNET_MTU_IP4);
1619     case VNET_LINK_IP6:
1620       return (VNET_MTU_IP6);
1621     case VNET_LINK_MPLS:
1622       return (VNET_MTU_MPLS);
1623     default:
1624       return (VNET_MTU_L3);
1625     }
1626 }
1627
1628 u8 *
1629 default_build_rewrite (vnet_main_t * vnm,
1630                        u32 sw_if_index,
1631                        vnet_link_t link_type, const void *dst_address)
1632 {
1633   return (NULL);
1634 }
1635
1636 void
1637 default_update_adjacency (vnet_main_t * vnm, u32 sw_if_index, u32 ai)
1638 {
1639   ip_adjacency_t *adj;
1640
1641   adj = adj_get (ai);
1642
1643   switch (adj->lookup_next_index)
1644     {
1645     case IP_LOOKUP_NEXT_GLEAN:
1646       adj_glean_update_rewrite (ai);
1647       break;
1648     case IP_LOOKUP_NEXT_ARP:
1649     case IP_LOOKUP_NEXT_BCAST:
1650       /*
1651        * default rewrite in neighbour adj
1652        */
1653       adj_nbr_update_rewrite
1654         (ai,
1655          ADJ_NBR_REWRITE_FLAG_COMPLETE,
1656          vnet_build_rewrite_for_sw_interface (vnm,
1657                                               sw_if_index,
1658                                               adj_get_link_type (ai), NULL));
1659       break;
1660     case IP_LOOKUP_NEXT_MCAST:
1661       /*
1662        * mcast traffic also uses default rewrite string with no mcast
1663        * switch time updates.
1664        */
1665       adj_mcast_update_rewrite
1666         (ai,
1667          vnet_build_rewrite_for_sw_interface (vnm,
1668                                               sw_if_index,
1669                                               adj_get_link_type (ai),
1670                                               NULL), 0);
1671       break;
1672     case IP_LOOKUP_NEXT_DROP:
1673     case IP_LOOKUP_NEXT_PUNT:
1674     case IP_LOOKUP_NEXT_LOCAL:
1675     case IP_LOOKUP_NEXT_REWRITE:
1676     case IP_LOOKUP_NEXT_MCAST_MIDCHAIN:
1677     case IP_LOOKUP_NEXT_MIDCHAIN:
1678     case IP_LOOKUP_NEXT_ICMP_ERROR:
1679     case IP_LOOKUP_N_NEXT:
1680       ASSERT (0);
1681       break;
1682     }
1683 }
1684
1685 int collect_detailed_interface_stats_flag = 0;
1686
1687 void
1688 collect_detailed_interface_stats_flag_set (void)
1689 {
1690   collect_detailed_interface_stats_flag = 1;
1691 }
1692
1693 void
1694 collect_detailed_interface_stats_flag_clear (void)
1695 {
1696   collect_detailed_interface_stats_flag = 0;
1697 }
1698
1699 static clib_error_t *
1700 collect_detailed_interface_stats_cli (vlib_main_t * vm,
1701                                       unformat_input_t * input,
1702                                       vlib_cli_command_t * cmd)
1703 {
1704   unformat_input_t _line_input, *line_input = &_line_input;
1705   clib_error_t *error = NULL;
1706
1707   /* Get a line of input. */
1708   if (!unformat_user (input, unformat_line_input, line_input))
1709     return clib_error_return (0, "expected enable | disable");
1710
1711   while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
1712     {
1713       if (unformat (line_input, "enable") || unformat (line_input, "on"))
1714         collect_detailed_interface_stats_flag_set ();
1715       else if (unformat (line_input, "disable")
1716                || unformat (line_input, "off"))
1717         collect_detailed_interface_stats_flag_clear ();
1718       else
1719         {
1720           error = clib_error_return (0, "unknown input `%U'",
1721                                      format_unformat_error, line_input);
1722           goto done;
1723         }
1724     }
1725
1726 done:
1727   unformat_free (line_input);
1728   return error;
1729 }
1730
1731 /* *INDENT-OFF* */
1732 VLIB_CLI_COMMAND (collect_detailed_interface_stats_command, static) = {
1733   .path = "interface collect detailed-stats",
1734   .short_help = "interface collect detailed-stats <enable|disable>",
1735   .function = collect_detailed_interface_stats_cli,
1736 };
1737 /* *INDENT-ON* */
1738
1739 /*
1740  * fd.io coding-style-patch-verification: ON
1741  *
1742  * Local Variables:
1743  * eval: (c-set-style "gnu")
1744  * End:
1745  */