vnet/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
  45 #define VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE (1 << 0)
  46 #define VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE (1 << 1)
  47
  48 static clib_error_t *vnet_hw_interface_set_flags_helper (vnet_main_t * vnm,
  49                                                          u32 hw_if_index,
  50                                                          u32 flags,
  51                                                          u32 helper_flags);
  52
  53 static clib_error_t *vnet_sw_interface_set_flags_helper (vnet_main_t * vnm,
  54                                                          u32 sw_if_index,
  55                                                          u32 flags,
  56                                                          u32 helper_flags);
  57
  58 static clib_error_t *vnet_hw_interface_set_class_helper (vnet_main_t * vnm,
  59                                                          u32 hw_if_index,
  60                                                          u32 hw_class_index,
  61                                                          u32 redistribute);
  62
  63 typedef struct
  64 {
  65   /* Either sw or hw interface index. */
  66   u32 sw_hw_if_index;
  67
  68   /* Flags. */
  69   u32 flags;
  70 } vnet_sw_hw_interface_state_t;
  71
  72 static void
  73 serialize_vec_vnet_sw_hw_interface_state (serialize_main_t * m, va_list * va)
  74 {
  75   vnet_sw_hw_interface_state_t *s =
  76     va_arg (*va, vnet_sw_hw_interface_state_t *);
  77   u32 n = va_arg (*va, u32);
  78   u32 i;
  79   for (i = 0; i < n; i++)
  80     {
  81       serialize_integer (m, s[i].sw_hw_if_index,
  82                          sizeof (s[i].sw_hw_if_index));
  83       serialize_integer (m, s[i].flags, sizeof (s[i].flags));
  84     }
  85 }
  86
  87 static void
  88 unserialize_vec_vnet_sw_hw_interface_state (serialize_main_t * m,
  89                                             va_list * va)
  90 {
  91   vnet_sw_hw_interface_state_t *s =
  92     va_arg (*va, vnet_sw_hw_interface_state_t *);
  93   u32 n = va_arg (*va, u32);
  94   u32 i;
  95   for (i = 0; i < n; i++)
  96     {
  97       unserialize_integer (m, &s[i].sw_hw_if_index,
  98                            sizeof (s[i].sw_hw_if_index));
  99       unserialize_integer (m, &s[i].flags, sizeof (s[i].flags));
 100     }
 101 }
 102
 103 static void
 104 serialize_vnet_sw_hw_interface_set_flags (serialize_main_t * m, va_list * va)
 105 {
 106   vnet_sw_hw_interface_state_t *s =
 107     va_arg (*va, vnet_sw_hw_interface_state_t *);
 108   serialize (m, serialize_vec_vnet_sw_hw_interface_state, s, 1);
 109 }
 110
 111 static void
 112 unserialize_vnet_sw_interface_set_flags (serialize_main_t * m, va_list * va)
 113 {
 114   CLIB_UNUSED (mc_main_t * mc) = va_arg (*va, mc_main_t *);
 115   vnet_sw_hw_interface_state_t s;
 116
 117   unserialize (m, unserialize_vec_vnet_sw_hw_interface_state, &s, 1);
 118
 119   vnet_sw_interface_set_flags_helper
 120     (vnet_get_main (), s.sw_hw_if_index, s.flags,
 121      /* helper_flags no redistribution */ 0);
 122 }
 123
 124 static void
 125 unserialize_vnet_hw_interface_set_flags (serialize_main_t * m, va_list * va)
 126 {
 127   CLIB_UNUSED (mc_main_t * mc) = va_arg (*va, mc_main_t *);
 128   vnet_sw_hw_interface_state_t s;
 129
 130   unserialize (m, unserialize_vec_vnet_sw_hw_interface_state, &s, 1);
 131
 132   vnet_hw_interface_set_flags_helper
 133     (vnet_get_main (), s.sw_hw_if_index, s.flags,
 134      /* helper_flags no redistribution */ 0);
 135 }
 136
 137 MC_SERIALIZE_MSG (vnet_sw_interface_set_flags_msg, static) =
 138 {
 139 .name = "vnet_sw_interface_set_flags",.serialize =
 140     serialize_vnet_sw_hw_interface_set_flags,.unserialize =
 141     unserialize_vnet_sw_interface_set_flags,};
 142
 143 MC_SERIALIZE_MSG (vnet_hw_interface_set_flags_msg, static) =
 144 {
 145 .name = "vnet_hw_interface_set_flags",.serialize =
 146     serialize_vnet_sw_hw_interface_set_flags,.unserialize =
 147     unserialize_vnet_hw_interface_set_flags,};
 148
 149 void
 150 serialize_vnet_interface_state (serialize_main_t * m, va_list * va)
 151 {
 152   vnet_main_t *vnm = va_arg (*va, vnet_main_t *);
 153   vnet_sw_hw_interface_state_t *sts = 0, *st;
 154   vnet_sw_interface_t *sif;
 155   vnet_hw_interface_t *hif;
 156   vnet_interface_main_t *im = &vnm->interface_main;
 157
 158   /* Serialize hardware interface classes since they may have changed.
 159      Must do this before sending up/down flags. */
 160   /* *INDENT-OFF* */
 161   pool_foreach (hif, im->hw_interfaces, ({
 162     vnet_hw_interface_class_t * hw_class = vnet_get_hw_interface_class (vnm, hif->hw_class_index);
 163     serialize_cstring (m, hw_class->name);
 164   }));
 165   /* *INDENT-ON* */
 166
 167   /* Send sw/hw interface state when non-zero. */
 168   /* *INDENT-OFF* */
 169   pool_foreach (sif, im->sw_interfaces, ({
 170     if (sif->flags != 0)
 171       {
 172         vec_add2 (sts, st, 1);
 173         st->sw_hw_if_index = sif->sw_if_index;
 174         st->flags = sif->flags;
 175       }
 176   }));
 177   /* *INDENT-ON* */
 178
 179   vec_serialize (m, sts, serialize_vec_vnet_sw_hw_interface_state);
 180
 181   if (sts)
 182     _vec_len (sts) = 0;
 183
 184   /* *INDENT-OFF* */
 185   pool_foreach (hif, im->hw_interfaces, ({
 186     if (hif->flags != 0)
 187       {
 188         vec_add2 (sts, st, 1);
 189         st->sw_hw_if_index = hif->hw_if_index;
 190         st->flags = hif->flags;
 191       }
 192   }));
 193   /* *INDENT-ON* */
 194
 195   vec_serialize (m, sts, serialize_vec_vnet_sw_hw_interface_state);
 196
 197   vec_free (sts);
 198 }
 199
 200 void
 201 unserialize_vnet_interface_state (serialize_main_t * m, va_list * va)
 202 {
 203   vnet_main_t *vnm = va_arg (*va, vnet_main_t *);
 204   vnet_sw_hw_interface_state_t *sts = 0, *st;
 205
 206   /* First set interface hardware class. */
 207   {
 208     vnet_interface_main_t *im = &vnm->interface_main;
 209     vnet_hw_interface_t *hif;
 210     char *class_name;
 211     uword *p;
 212     clib_error_t *error;
 213
 214     /* *INDENT-OFF* */
 215     pool_foreach (hif, im->hw_interfaces, ({
 216       unserialize_cstring (m, &class_name);
 217       p = hash_get_mem (im->hw_interface_class_by_name, class_name);
 218       ASSERT (p != 0);
 219       error = vnet_hw_interface_set_class_helper (vnm, hif->hw_if_index, p[0], /* redistribute */ 0);
 220       if (error)
 221         clib_error_report (error);
 222       vec_free (class_name);
 223     }));
 224     /* *INDENT-ON* */
 225   }
 226
 227   vec_unserialize (m, &sts, unserialize_vec_vnet_sw_hw_interface_state);
 228   vec_foreach (st, sts)
 229     vnet_sw_interface_set_flags_helper (vnm, st->sw_hw_if_index, st->flags,
 230                                         /* no distribute */ 0);
 231   vec_free (sts);
 232
 233   vec_unserialize (m, &sts, unserialize_vec_vnet_sw_hw_interface_state);
 234   vec_foreach (st, sts)
 235     vnet_hw_interface_set_flags_helper (vnm, st->sw_hw_if_index, st->flags,
 236                                         /* no distribute */ 0);
 237   vec_free (sts);
 238 }
 239
 240 static clib_error_t *
 241 call_elf_section_interface_callbacks (vnet_main_t * vnm, u32 if_index,
 242                                       u32 flags,
 243                                       _vnet_interface_function_list_elt_t *
 244                                       elt)
 245 {
 246   clib_error_t *error = 0;
 247
 248   while (elt)
 249     {
 250       error = elt->fp (vnm, if_index, flags);
 251       if (error)
 252         return error;
 253       elt = elt->next_interface_function;
 254     }
 255   return error;
 256 }
 257
 258 static clib_error_t *
 259 call_hw_interface_add_del_callbacks (vnet_main_t * vnm, u32 hw_if_index,
 260                                      u32 is_create)
 261 {
 262   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
 263   vnet_hw_interface_class_t *hw_class =
 264     vnet_get_hw_interface_class (vnm, hi->hw_class_index);
 265   vnet_device_class_t *dev_class =
 266     vnet_get_device_class (vnm, hi->dev_class_index);
 267   clib_error_t *error = 0;
 268
 269   if (hw_class->interface_add_del_function
 270       && (error =
 271           hw_class->interface_add_del_function (vnm, hw_if_index, is_create)))
 272     return error;
 273
 274   if (dev_class->interface_add_del_function
 275       && (error =
 276           dev_class->interface_add_del_function (vnm, hw_if_index,
 277                                                  is_create)))
 278     return error;
 279
 280   error = call_elf_section_interface_callbacks
 281     (vnm, hw_if_index, is_create, vnm->hw_interface_add_del_functions);
 282
 283   return error;
 284 }
 285
 286 static clib_error_t *
 287 call_sw_interface_add_del_callbacks (vnet_main_t * vnm, u32 sw_if_index,
 288                                      u32 is_create)
 289 {
 290   return call_elf_section_interface_callbacks
 291     (vnm, sw_if_index, is_create, vnm->sw_interface_add_del_functions);
 292 }
 293
 294 #define VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE (1 << 0)
 295 #define VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE (1 << 1)
 296
 297 static clib_error_t *
 298 vnet_hw_interface_set_flags_helper (vnet_main_t * vnm, u32 hw_if_index,
 299                                     u32 flags, u32 helper_flags)
 300 {
 301   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
 302   vnet_hw_interface_class_t *hw_class =
 303     vnet_get_hw_interface_class (vnm, hi->hw_class_index);
 304   vnet_device_class_t *dev_class =
 305     vnet_get_device_class (vnm, hi->dev_class_index);
 306   vlib_main_t *vm = vnm->vlib_main;
 307   u32 mask;
 308   clib_error_t *error = 0;
 309   u32 is_create =
 310     (helper_flags & VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE) != 0;
 311
 312   mask =
 313     (VNET_HW_INTERFACE_FLAG_LINK_UP | VNET_HW_INTERFACE_FLAG_DUPLEX_MASK |
 314      VNET_HW_INTERFACE_FLAG_SPEED_MASK);
 315   flags &= mask;
 316
 317   /* Call hardware interface add/del callbacks. */
 318   if (is_create)
 319     call_hw_interface_add_del_callbacks (vnm, hw_if_index, is_create);
 320
 321   /* Already in the desired state? */
 322   if (!is_create && (hi->flags & mask) == flags)
 323     goto done;
 324
 325   /* Some interface classes do not redistribute (e.g. are local). */
 326   if (!dev_class->redistribute)
 327     helper_flags &= ~VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE;
 328
 329   if (vm->mc_main
 330       && (helper_flags & VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE))
 331     {
 332       vnet_sw_hw_interface_state_t s;
 333       s.sw_hw_if_index = hw_if_index;
 334       s.flags = flags;
 335       mc_serialize (vm->mc_main, &vnet_hw_interface_set_flags_msg, &s);
 336     }
 337
 338   if ((hi->flags & VNET_HW_INTERFACE_FLAG_LINK_UP) !=
 339       (flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
 340     {
 341       /* Do hardware class (e.g. ethernet). */
 342       if (hw_class->link_up_down_function
 343           && (error = hw_class->link_up_down_function (vnm, hw_if_index,
 344                                                        flags)))
 345         goto done;
 346
 347       error = call_elf_section_interface_callbacks
 348         (vnm, hw_if_index, flags, vnm->hw_interface_link_up_down_functions);
 349
 350       if (error)
 351         goto done;
 352     }
 353
 354   hi->flags &= ~mask;
 355   hi->flags |= flags;
 356
 357 done:
 358   return error;
 359 }
 360
 361 static clib_error_t *
 362 vnet_sw_interface_set_flags_helper (vnet_main_t * vnm, u32 sw_if_index,
 363                                     u32 flags, u32 helper_flags)
 364 {
 365   vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
 366   vlib_main_t *vm = vnm->vlib_main;
 367   u32 mask;
 368   clib_error_t *error = 0;
 369   u32 is_create =
 370     (helper_flags & VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE) != 0;
 371   u32 old_flags;
 372
 373   mask = VNET_SW_INTERFACE_FLAG_ADMIN_UP | VNET_SW_INTERFACE_FLAG_PUNT;
 374   flags &= mask;
 375
 376   if (is_create)
 377     {
 378       error =
 379         call_sw_interface_add_del_callbacks (vnm, sw_if_index, is_create);
 380       if (error)
 381         goto done;
 382
 383       if (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
 384         {
 385           /* Notify everyone when the interface is created as admin up */
 386           error = call_elf_section_interface_callbacks (vnm, sw_if_index,
 387                                                         flags,
 388                                                         vnm->
 389                                                         sw_interface_admin_up_down_functions);
 390           if (error)
 391             goto done;
 392         }
 393     }
 394   else
 395     {
 396       vnet_sw_interface_t *si_sup = si;
 397
 398       /* Check that super interface is in correct state. */
 399       if (si->type == VNET_SW_INTERFACE_TYPE_SUB)
 400         {
 401           si_sup = vnet_get_sw_interface (vnm, si->sup_sw_if_index);
 402
 403           /* Check to see if we're bringing down the soft interface and if it's parent is up */
 404           if ((flags != (si_sup->flags & mask)) &&
 405               (!((flags == 0)
 406                  && ((si_sup->flags & mask) ==
 407                      VNET_SW_INTERFACE_FLAG_ADMIN_UP))))
 408             {
 409               error = clib_error_return (0, "super-interface %U must be %U",
 410                                          format_vnet_sw_interface_name, vnm,
 411                                          si_sup,
 412                                          format_vnet_sw_interface_flags,
 413                                          flags);
 414               goto done;
 415             }
 416         }
 417
 418       /* Donot change state for slave link of bonded interfaces */
 419       if (si->flags & VNET_SW_INTERFACE_FLAG_BOND_SLAVE)
 420         {
 421           error = clib_error_return
 422             (0, "not allowed as %U belong to a BondEthernet interface",
 423              format_vnet_sw_interface_name, vnm, si);
 424           goto done;
 425         }
 426
 427       /* Already in the desired state? */
 428       if ((si->flags & mask) == flags)
 429         goto done;
 430
 431       /* Sub-interfaces of hardware interfaces that do no redistribute,
 432          do not redistribute themselves. */
 433       if (si_sup->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
 434         {
 435           vnet_hw_interface_t *hi =
 436             vnet_get_hw_interface (vnm, si_sup->hw_if_index);
 437           vnet_device_class_t *dev_class =
 438             vnet_get_device_class (vnm, hi->dev_class_index);
 439           if (!dev_class->redistribute)
 440             helper_flags &=
 441               ~VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE;
 442         }
 443
 444       if (vm->mc_main
 445           && (helper_flags &
 446               VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE))
 447         {
 448           vnet_sw_hw_interface_state_t s;
 449           s.sw_hw_if_index = sw_if_index;
 450           s.flags = flags;
 451           mc_serialize (vm->mc_main, &vnet_sw_interface_set_flags_msg, &s);
 452         }
 453
 454       /* set the flags now before invoking the registered clients
 455        * so that the state they query is consistent with the state here notified */
 456       old_flags = si->flags;
 457       si->flags &= ~mask;
 458       si->flags |= flags;
 459       if ((flags | old_flags) & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
 460         error = call_elf_section_interface_callbacks
 461           (vnm, sw_if_index, flags,
 462            vnm->sw_interface_admin_up_down_functions);
 463       si->flags = old_flags;
 464
 465       if (error)
 466         goto done;
 467
 468       if (si->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
 469         {
 470           vnet_hw_interface_t *hi =
 471             vnet_get_hw_interface (vnm, si->hw_if_index);
 472           vnet_hw_interface_class_t *hw_class =
 473             vnet_get_hw_interface_class (vnm, hi->hw_class_index);
 474           vnet_device_class_t *dev_class =
 475             vnet_get_device_class (vnm, hi->dev_class_index);
 476
 477           /* save the si admin up flag */
 478           old_flags = si->flags;
 479
 480           /* update si admin up flag in advance if we are going admin down */
 481           if (!(flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
 482             si->flags &= ~VNET_SW_INTERFACE_FLAG_ADMIN_UP;
 483
 484           if (dev_class->admin_up_down_function
 485               && (error = dev_class->admin_up_down_function (vnm,
 486                                                              si->hw_if_index,
 487                                                              flags)))
 488             {
 489               /* restore si admin up flag to it's original state on errors */
 490               si->flags = old_flags;
 491               goto done;
 492             }
 493
 494           if (hw_class->admin_up_down_function
 495               && (error = hw_class->admin_up_down_function (vnm,
 496                                                             si->hw_if_index,
 497                                                             flags)))
 498             {
 499               /* restore si admin up flag to it's original state on errors */
 500               si->flags = old_flags;
 501               goto done;
 502             }
 503
 504           /* Admin down implies link down. */
 505           if (!(flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
 506               && (hi->flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
 507             vnet_hw_interface_set_flags_helper (vnm, si->hw_if_index,
 508                                                 hi->flags &
 509                                                 ~VNET_HW_INTERFACE_FLAG_LINK_UP,
 510                                                 helper_flags);
 511         }
 512     }
 513
 514   si->flags &= ~mask;
 515   si->flags |= flags;
 516
 517 done:
 518   return error;
 519 }
 520
 521 clib_error_t *
 522 vnet_hw_interface_set_flags (vnet_main_t * vnm, u32 hw_if_index, u32 flags)
 523 {
 524   return vnet_hw_interface_set_flags_helper
 525     (vnm, hw_if_index, flags,
 526      VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE);
 527 }
 528
 529 clib_error_t *
 530 vnet_sw_interface_set_flags (vnet_main_t * vnm, u32 sw_if_index, u32 flags)
 531 {
 532   return vnet_sw_interface_set_flags_helper
 533     (vnm, sw_if_index, flags,
 534      VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE);
 535 }
 536
 537 static u32
 538 vnet_create_sw_interface_no_callbacks (vnet_main_t * vnm,
 539                                        vnet_sw_interface_t * template)
 540 {
 541   vnet_interface_main_t *im = &vnm->interface_main;
 542   vnet_sw_interface_t *sw;
 543   u32 sw_if_index;
 544
 545   pool_get (im->sw_interfaces, sw);
 546   sw_if_index = sw - im->sw_interfaces;
 547
 548   sw[0] = template[0];
 549
 550   sw->flags = 0;
 551   sw->sw_if_index = sw_if_index;
 552   if (sw->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
 553     sw->sup_sw_if_index = sw->sw_if_index;
 554
 555   /* Allocate counters for this interface. */
 556   {
 557     u32 i;
 558
 559     vnet_interface_counter_lock (im);
 560
 561     for (i = 0; i < vec_len (im->sw_if_counters); i++)
 562       {
 563         vlib_validate_simple_counter (&im->sw_if_counters[i], sw_if_index);
 564         vlib_zero_simple_counter (&im->sw_if_counters[i], sw_if_index);
 565       }
 566
 567     for (i = 0; i < vec_len (im->combined_sw_if_counters); i++)
 568       {
 569         vlib_validate_combined_counter (&im->combined_sw_if_counters[i],
 570                                         sw_if_index);
 571         vlib_zero_combined_counter (&im->combined_sw_if_counters[i],
 572                                     sw_if_index);
 573       }
 574
 575     vnet_interface_counter_unlock (im);
 576   }
 577
 578   return sw_if_index;
 579 }
 580
 581 clib_error_t *
 582 vnet_create_sw_interface (vnet_main_t * vnm, vnet_sw_interface_t * template,
 583                           u32 * sw_if_index)
 584 {
 585   clib_error_t *error;
 586   vnet_hw_interface_t *hi;
 587   vnet_device_class_t *dev_class;
 588
 589   hi = vnet_get_sup_hw_interface (vnm, template->sup_sw_if_index);
 590   dev_class = vnet_get_device_class (vnm, hi->dev_class_index);
 591
 592   if (template->type == VNET_SW_INTERFACE_TYPE_SUB &&
 593       dev_class->subif_add_del_function)
 594     {
 595       error = dev_class->subif_add_del_function (vnm, hi->hw_if_index,
 596                                                  (struct vnet_sw_interface_t
 597                                                   *) template, 1);
 598       if (error)
 599         return error;
 600     }
 601
 602   *sw_if_index = vnet_create_sw_interface_no_callbacks (vnm, template);
 603   error = vnet_sw_interface_set_flags_helper
 604     (vnm, *sw_if_index, template->flags,
 605      VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE);
 606
 607   if (error)
 608     {
 609       /* undo the work done by vnet_create_sw_interface_no_callbacks() */
 610       vnet_interface_main_t *im = &vnm->interface_main;
 611       vnet_sw_interface_t *sw =
 612         pool_elt_at_index (im->sw_interfaces, *sw_if_index);
 613       pool_put (im->sw_interfaces, sw);
 614     }
 615
 616   return error;
 617 }
 618
 619 void
 620 vnet_delete_sw_interface (vnet_main_t * vnm, u32 sw_if_index)
 621 {
 622   vnet_interface_main_t *im = &vnm->interface_main;
 623   vnet_sw_interface_t *sw =
 624     pool_elt_at_index (im->sw_interfaces, sw_if_index);
 625
 626   /* Bring down interface in case it is up. */
 627   if (sw->flags != 0)
 628     vnet_sw_interface_set_flags (vnm, sw_if_index, /* flags */ 0);
 629
 630   call_sw_interface_add_del_callbacks (vnm, sw_if_index, /* is_create */ 0);
 631
 632   pool_put (im->sw_interfaces, sw);
 633 }
 634
 635 static void
 636 setup_tx_node (vlib_main_t * vm,
 637                u32 node_index, vnet_device_class_t * dev_class)
 638 {
 639   vlib_node_t *n = vlib_get_node (vm, node_index);
 640
 641   n->function = dev_class->tx_function;
 642   n->format_trace = dev_class->format_tx_trace;
 643
 644   vlib_register_errors (vm, node_index,
 645                         dev_class->tx_function_n_errors,
 646                         dev_class->tx_function_error_strings);
 647 }
 648
 649 static void
 650 setup_output_node (vlib_main_t * vm,
 651                    u32 node_index, vnet_hw_interface_class_t * hw_class)
 652 {
 653   vlib_node_t *n = vlib_get_node (vm, node_index);
 654   n->format_buffer = hw_class->format_header;
 655   n->unformat_buffer = hw_class->unformat_header;
 656 }
 657
 658 /* Register an interface instance. */
 659 u32
 660 vnet_register_interface (vnet_main_t * vnm,
 661                          u32 dev_class_index,
 662                          u32 dev_instance,
 663                          u32 hw_class_index, u32 hw_instance)
 664 {
 665   vnet_interface_main_t *im = &vnm->interface_main;
 666   vnet_hw_interface_t *hw;
 667   vnet_device_class_t *dev_class =
 668     vnet_get_device_class (vnm, dev_class_index);
 669   vnet_hw_interface_class_t *hw_class =
 670     vnet_get_hw_interface_class (vnm, hw_class_index);
 671   vlib_main_t *vm = vnm->vlib_main;
 672   u32 hw_index;
 673   char *tx_node_name, *output_node_name;
 674
 675   pool_get (im->hw_interfaces, hw);
 676
 677   hw_index = hw - im->hw_interfaces;
 678   hw->hw_if_index = hw_index;
 679
 680   if (dev_class->format_device_name)
 681     hw->name = format (0, "%U", dev_class->format_device_name, dev_instance);
 682   else if (hw_class->format_interface_name)
 683     hw->name = format (0, "%U", hw_class->format_interface_name,
 684                        dev_instance);
 685   else
 686     hw->name = format (0, "%s%x", hw_class->name, dev_instance);
 687
 688   if (!im->hw_interface_by_name)
 689     im->hw_interface_by_name = hash_create_vec ( /* size */ 0,
 690                                                 sizeof (hw->name[0]),
 691                                                 sizeof (uword));
 692
 693   hash_set_mem (im->hw_interface_by_name, hw->name, hw_index);
 694
 695   /* Make hardware interface point to software interface. */
 696   {
 697     vnet_sw_interface_t sw;
 698
 699     memset (&sw, 0, sizeof (sw));
 700     sw.type = VNET_SW_INTERFACE_TYPE_HARDWARE;
 701     sw.hw_if_index = hw_index;
 702     hw->sw_if_index = vnet_create_sw_interface_no_callbacks (vnm, &sw);
 703   }
 704
 705   hw->dev_class_index = dev_class_index;
 706   hw->dev_instance = dev_instance;
 707   hw->hw_class_index = hw_class_index;
 708   hw->hw_instance = hw_instance;
 709
 710   hw->max_rate_bits_per_sec = 0;
 711   hw->min_packet_bytes = 0;
 712   hw->per_packet_overhead_bytes = 0;
 713   hw->max_l3_packet_bytes[VLIB_RX] = ~0;
 714   hw->max_l3_packet_bytes[VLIB_TX] = ~0;
 715
 716   tx_node_name = (char *) format (0, "%v-tx", hw->name);
 717   output_node_name = (char *) format (0, "%v-output", hw->name);
 718
 719   /* If we have previously deleted interface nodes, re-use them. */
 720   if (vec_len (im->deleted_hw_interface_nodes) > 0)
 721     {
 722       vnet_hw_interface_nodes_t *hn;
 723       vnet_interface_output_runtime_t *rt;
 724       vlib_node_t *node;
 725       vlib_node_runtime_t *nrt;
 726
 727       hn = vec_end (im->deleted_hw_interface_nodes) - 1;
 728
 729       hw->tx_node_index = hn->tx_node_index;
 730       hw->output_node_index = hn->output_node_index;
 731
 732       vlib_node_rename (vm, hw->tx_node_index, "%v", tx_node_name);
 733       vlib_node_rename (vm, hw->output_node_index, "%v", output_node_name);
 734
 735       rt = vlib_node_get_runtime_data (vm, hw->output_node_index);
 736       ASSERT (rt->is_deleted == 1);
 737       rt->is_deleted = 0;
 738       rt->hw_if_index = hw_index;
 739       rt->sw_if_index = hw->sw_if_index;
 740       rt->dev_instance = hw->dev_instance;
 741
 742       rt = vlib_node_get_runtime_data (vm, hw->tx_node_index);
 743       rt->hw_if_index = hw_index;
 744       rt->sw_if_index = hw->sw_if_index;
 745       rt->dev_instance = hw->dev_instance;
 746
 747       /* The new class may differ from the old one.
 748        * Functions have to be updated. */
 749       node = vlib_get_node (vm, hw->output_node_index);
 750       node->function = dev_class->no_flatten_output_chains ?
 751         vnet_interface_output_node_no_flatten_multiarch_select () :
 752         vnet_interface_output_node_multiarch_select ();
 753       node->format_trace = format_vnet_interface_output_trace;
 754       nrt = vlib_node_get_runtime (vm, hw->output_node_index);
 755       nrt->function = node->function;
 756
 757       node = vlib_get_node (vm, hw->tx_node_index);
 758       node->function = dev_class->tx_function;
 759       node->format_trace = dev_class->format_tx_trace;
 760       nrt = vlib_node_get_runtime (vm, hw->tx_node_index);
 761       nrt->function = node->function;
 762
 763       vlib_worker_thread_node_runtime_update ();
 764       _vec_len (im->deleted_hw_interface_nodes) -= 1;
 765     }
 766   else
 767     {
 768       vlib_node_registration_t r;
 769       vnet_interface_output_runtime_t rt = {
 770         .hw_if_index = hw_index,
 771         .sw_if_index = hw->sw_if_index,
 772         .dev_instance = hw->dev_instance,
 773         .is_deleted = 0,
 774       };
 775
 776       memset (&r, 0, sizeof (r));
 777       r.type = VLIB_NODE_TYPE_INTERNAL;
 778       r.runtime_data = &rt;
 779       r.runtime_data_bytes = sizeof (rt);
 780       r.scalar_size = 0;
 781       r.vector_size = sizeof (u32);
 782
 783       r.flags = VLIB_NODE_FLAG_IS_OUTPUT;
 784       r.name = tx_node_name;
 785       r.function = dev_class->tx_function;
 786
 787       hw->tx_node_index = vlib_register_node (vm, &r);
 788
 789       vlib_node_add_named_next_with_slot (vm, hw->tx_node_index,
 790                                           "error-drop",
 791                                           VNET_INTERFACE_TX_NEXT_DROP);
 792
 793       r.flags = 0;
 794       r.name = output_node_name;
 795       r.function = dev_class->no_flatten_output_chains ?
 796         vnet_interface_output_node_no_flatten_multiarch_select () :
 797         vnet_interface_output_node_multiarch_select ();
 798       r.format_trace = format_vnet_interface_output_trace;
 799
 800       {
 801         static char *e[] = {
 802           "interface is down",
 803           "interface is deleted",
 804         };
 805
 806         r.n_errors = ARRAY_LEN (e);
 807         r.error_strings = e;
 808       }
 809       hw->output_node_index = vlib_register_node (vm, &r);
 810
 811 #define _(sym,str) vlib_node_add_named_next_with_slot (vm, \
 812                      hw->output_node_index, str,           \
 813                      VNET_INTERFACE_OUTPUT_NEXT_##sym);
 814       foreach_intf_output_feat
 815 #undef _
 816         vlib_node_add_named_next_with_slot (vm, hw->output_node_index,
 817                                             "error-drop",
 818                                             VNET_INTERFACE_OUTPUT_NEXT_DROP);
 819       vlib_node_add_next_with_slot (vm, hw->output_node_index,
 820                                     hw->tx_node_index,
 821                                     VNET_INTERFACE_OUTPUT_NEXT_TX);
 822     }
 823
 824   setup_output_node (vm, hw->output_node_index, hw_class);
 825   setup_tx_node (vm, hw->tx_node_index, dev_class);
 826
 827   /* Call all up/down callbacks with zero flags when interface is created. */
 828   vnet_sw_interface_set_flags_helper (vnm, hw->sw_if_index, /* flags */ 0,
 829                                       VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE);
 830   vnet_hw_interface_set_flags_helper (vnm, hw_index, /* flags */ 0,
 831                                       VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE);
 832
 833   return hw_index;
 834 }
 835
 836 void
 837 vnet_delete_hw_interface (vnet_main_t * vnm, u32 hw_if_index)
 838 {
 839   vnet_interface_main_t *im = &vnm->interface_main;
 840   vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
 841   vlib_main_t *vm = vnm->vlib_main;
 842
 843   /* If it is up, mark it down. */
 844   if (hw->flags != 0)
 845     vnet_hw_interface_set_flags (vnm, hw_if_index, /* flags */ 0);
 846
 847   /* Call delete callbacks. */
 848   call_hw_interface_add_del_callbacks (vnm, hw_if_index, /* is_create */ 0);
 849
 850   /* Delete software interface corresponding to hardware interface. */
 851   vnet_delete_sw_interface (vnm, hw->sw_if_index);
 852
 853   /* Delete any sub-interfaces. */
 854   {
 855     u32 id, sw_if_index;
 856     /* *INDENT-OFF* */
 857     hash_foreach (id, sw_if_index, hw->sub_interface_sw_if_index_by_id, ({
 858       vnet_delete_sw_interface (vnm, sw_if_index);
 859     }));
 860     /* *INDENT-ON* */
 861   }
 862
 863   {
 864     vnet_hw_interface_nodes_t *dn;
 865     vnet_interface_output_runtime_t *rt =
 866       vlib_node_get_runtime_data (vm, hw->output_node_index);
 867
 868     /* Mark node runtime as deleted so output node (if called) will drop packets. */
 869     rt->is_deleted = 1;
 870
 871     vlib_node_rename (vm, hw->output_node_index,
 872                       "interface-%d-output-deleted", hw_if_index);
 873     vlib_node_rename (vm, hw->tx_node_index, "interface-%d-tx-deleted",
 874                       hw_if_index);
 875     vec_add2 (im->deleted_hw_interface_nodes, dn, 1);
 876     dn->tx_node_index = hw->tx_node_index;
 877     dn->output_node_index = hw->output_node_index;
 878   }
 879
 880   hash_unset_mem (im->hw_interface_by_name, hw->name);
 881   vec_free (hw->name);
 882
 883   pool_put (im->hw_interfaces, hw);
 884 }
 885
 886 static void
 887 serialize_vnet_hw_interface_set_class (serialize_main_t * m, va_list * va)
 888 {
 889   u32 hw_if_index = va_arg (*va, u32);
 890   char *hw_class_name = va_arg (*va, char *);
 891   serialize_integer (m, hw_if_index, sizeof (hw_if_index));
 892   serialize_cstring (m, hw_class_name);
 893 }
 894
 895 static void
 896 unserialize_vnet_hw_interface_set_class (serialize_main_t * m, va_list * va)
 897 {
 898   CLIB_UNUSED (mc_main_t * mc) = va_arg (*va, mc_main_t *);
 899   vnet_main_t *vnm = vnet_get_main ();
 900   u32 hw_if_index;
 901   char *hw_class_name;
 902   uword *p;
 903   clib_error_t *error;
 904
 905   unserialize_integer (m, &hw_if_index, sizeof (hw_if_index));
 906   unserialize_cstring (m, &hw_class_name);
 907   p =
 908     hash_get (vnm->interface_main.hw_interface_class_by_name, hw_class_name);
 909   ASSERT (p != 0);
 910   error = vnet_hw_interface_set_class_helper (vnm, hw_if_index, p[0],
 911                                               /* redistribute */ 0);
 912   if (error)
 913     clib_error_report (error);
 914 }
 915
 916 MC_SERIALIZE_MSG (vnet_hw_interface_set_class_msg, static) =
 917 {
 918 .name = "vnet_hw_interface_set_class",.serialize =
 919     serialize_vnet_hw_interface_set_class,.unserialize =
 920     unserialize_vnet_hw_interface_set_class,};
 921
 922 void
 923 vnet_hw_interface_init_for_class (vnet_main_t * vnm, u32 hw_if_index,
 924                                   u32 hw_class_index, u32 hw_instance)
 925 {
 926   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
 927   vnet_hw_interface_class_t *hc =
 928     vnet_get_hw_interface_class (vnm, hw_class_index);
 929
 930   hi->hw_class_index = hw_class_index;
 931   hi->hw_instance = hw_instance;
 932   setup_output_node (vnm->vlib_main, hi->output_node_index, hc);
 933 }
 934
 935 static clib_error_t *
 936 vnet_hw_interface_set_class_helper (vnet_main_t * vnm, u32 hw_if_index,
 937                                     u32 hw_class_index, u32 redistribute)
 938 {
 939   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
 940   vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, hi->sw_if_index);
 941   vnet_hw_interface_class_t *old_class =
 942     vnet_get_hw_interface_class (vnm, hi->hw_class_index);
 943   vnet_hw_interface_class_t *new_class =
 944     vnet_get_hw_interface_class (vnm, hw_class_index);
 945   vnet_device_class_t *dev_class =
 946     vnet_get_device_class (vnm, hi->dev_class_index);
 947   clib_error_t *error = 0;
 948
 949   /* New class equals old class?  Nothing to do. */
 950   if (hi->hw_class_index == hw_class_index)
 951     return 0;
 952
 953   /* No need (and incorrect since admin up flag may be set) to do error checking when
 954      receiving unserialize message. */
 955   if (redistribute)
 956     {
 957       if (si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
 958         return clib_error_return (0,
 959                                   "%v must be admin down to change class from %s to %s",
 960                                   hi->name, old_class->name, new_class->name);
 961
 962       /* Make sure interface supports given class. */
 963       if ((new_class->is_valid_class_for_interface
 964            && !new_class->is_valid_class_for_interface (vnm, hw_if_index,
 965                                                         hw_class_index))
 966           || (dev_class->is_valid_class_for_interface
 967               && !dev_class->is_valid_class_for_interface (vnm, hw_if_index,
 968                                                            hw_class_index)))
 969         return clib_error_return (0,
 970                                   "%v class cannot be changed from %s to %s",
 971                                   hi->name, old_class->name, new_class->name);
 972
 973       if (vnm->vlib_main->mc_main)
 974         {
 975           mc_serialize (vnm->vlib_main->mc_main,
 976                         &vnet_hw_interface_set_class_msg, hw_if_index,
 977                         new_class->name);
 978           return 0;
 979         }
 980     }
 981
 982   if (old_class->hw_class_change)
 983     old_class->hw_class_change (vnm, hw_if_index, old_class->index,
 984                                 new_class->index);
 985
 986   vnet_hw_interface_init_for_class (vnm, hw_if_index, new_class->index,
 987                                     /* instance */ ~0);
 988
 989   if (new_class->hw_class_change)
 990     new_class->hw_class_change (vnm, hw_if_index, old_class->index,
 991                                 new_class->index);
 992
 993   if (dev_class->hw_class_change)
 994     dev_class->hw_class_change (vnm, hw_if_index, new_class->index);
 995
 996   return error;
 997 }
 998
 999 clib_error_t *
1000 vnet_hw_interface_set_class (vnet_main_t * vnm, u32 hw_if_index,
1001                              u32 hw_class_index)
1002 {
1003   return vnet_hw_interface_set_class_helper (vnm, hw_if_index, hw_class_index,
1004                                              /* redistribute */ 1);
1005 }
1006
1007 static int
1008 vnet_hw_interface_rx_redirect_to_node_helper (vnet_main_t * vnm,
1009                                               u32 hw_if_index,
1010                                               u32 node_index,
1011                                               u32 redistribute)
1012 {
1013   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1014   vnet_device_class_t *dev_class = vnet_get_device_class
1015     (vnm, hi->dev_class_index);
1016
1017   if (redistribute)
1018     {
1019       /* $$$$ fixme someday maybe */
1020       ASSERT (vnm->vlib_main->mc_main == 0);
1021     }
1022   if (dev_class->rx_redirect_to_node)
1023     {
1024       dev_class->rx_redirect_to_node (vnm, hw_if_index, node_index);
1025       return 0;
1026     }
1027
1028   return VNET_API_ERROR_UNIMPLEMENTED;
1029 }
1030
1031 int
1032 vnet_hw_interface_rx_redirect_to_node (vnet_main_t * vnm, u32 hw_if_index,
1033                                        u32 node_index)
1034 {
1035   return vnet_hw_interface_rx_redirect_to_node_helper (vnm, hw_if_index,
1036                                                        node_index,
1037                                                        1 /* redistribute */ );
1038 }
1039
1040 word
1041 vnet_sw_interface_compare (vnet_main_t * vnm,
1042                            uword sw_if_index0, uword sw_if_index1)
1043 {
1044   vnet_sw_interface_t *sup0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1045   vnet_sw_interface_t *sup1 = vnet_get_sup_sw_interface (vnm, sw_if_index1);
1046   vnet_hw_interface_t *h0 = vnet_get_hw_interface (vnm, sup0->hw_if_index);
1047   vnet_hw_interface_t *h1 = vnet_get_hw_interface (vnm, sup1->hw_if_index);
1048
1049   if (h0 != h1)
1050     return vec_cmp (h0->name, h1->name);
1051   return (word) h0->hw_instance - (word) h1->hw_instance;
1052 }
1053
1054 word
1055 vnet_hw_interface_compare (vnet_main_t * vnm,
1056                            uword hw_if_index0, uword hw_if_index1)
1057 {
1058   vnet_hw_interface_t *h0 = vnet_get_hw_interface (vnm, hw_if_index0);
1059   vnet_hw_interface_t *h1 = vnet_get_hw_interface (vnm, hw_if_index1);
1060
1061   if (h0 != h1)
1062     return vec_cmp (h0->name, h1->name);
1063   return (word) h0->hw_instance - (word) h1->hw_instance;
1064 }
1065
1066 int
1067 vnet_sw_interface_is_p2p (vnet_main_t * vnm, u32 sw_if_index)
1068 {
1069   vnet_hw_interface_t *hw = vnet_get_sup_hw_interface (vnm, sw_if_index);
1070   vnet_hw_interface_class_t *hc =
1071     vnet_get_hw_interface_class (vnm, hw->hw_class_index);
1072
1073   return (hc->flags & VNET_HW_INTERFACE_CLASS_FLAG_P2P);
1074 }
1075
1076 clib_error_t *
1077 vnet_interface_init (vlib_main_t * vm)
1078 {
1079   vnet_main_t *vnm = vnet_get_main ();
1080   vnet_interface_main_t *im = &vnm->interface_main;
1081   vlib_buffer_t *b = 0;
1082   vnet_buffer_opaque_t *o = 0;
1083
1084   /*
1085    * Keep people from shooting themselves in the foot.
1086    */
1087   if (sizeof (b->opaque) != sizeof (vnet_buffer_opaque_t))
1088     {
1089 #define _(a) if (sizeof(o->a) > sizeof (o->unused))                     \
1090       clib_warning                                                      \
1091         ("FATAL: size of opaque union subtype %s is %d (max %d)",       \
1092          #a, sizeof(o->a), sizeof (o->unused));
1093       foreach_buffer_opaque_union_subtype;
1094 #undef _
1095
1096       return clib_error_return
1097         (0, "FATAL: size of vlib buffer opaque %d, size of vnet opaque %d",
1098          sizeof (b->opaque), sizeof (vnet_buffer_opaque_t));
1099     }
1100
1101   im->sw_if_counter_lock = clib_mem_alloc_aligned (CLIB_CACHE_LINE_BYTES,
1102                                                    CLIB_CACHE_LINE_BYTES);
1103   im->sw_if_counter_lock[0] = 1;        /* should be no need */
1104
1105   vec_validate (im->sw_if_counters, VNET_N_SIMPLE_INTERFACE_COUNTER - 1);
1106   im->sw_if_counters[VNET_INTERFACE_COUNTER_DROP].name = "drops";
1107   im->sw_if_counters[VNET_INTERFACE_COUNTER_PUNT].name = "punts";
1108   im->sw_if_counters[VNET_INTERFACE_COUNTER_IP4].name = "ip4";
1109   im->sw_if_counters[VNET_INTERFACE_COUNTER_IP6].name = "ip6";
1110   im->sw_if_counters[VNET_INTERFACE_COUNTER_RX_NO_BUF].name = "rx-no-buf";
1111   im->sw_if_counters[VNET_INTERFACE_COUNTER_RX_MISS].name = "rx-miss";
1112   im->sw_if_counters[VNET_INTERFACE_COUNTER_RX_ERROR].name = "rx-error";
1113   im->sw_if_counters[VNET_INTERFACE_COUNTER_TX_ERROR].name = "tx-error";
1114
1115   vec_validate (im->combined_sw_if_counters,
1116                 VNET_N_COMBINED_INTERFACE_COUNTER - 1);
1117   im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_RX].name = "rx";
1118   im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_TX].name = "tx";
1119
1120   im->sw_if_counter_lock[0] = 0;
1121
1122   im->device_class_by_name = hash_create_string ( /* size */ 0,
1123                                                  sizeof (uword));
1124   {
1125     vnet_device_class_t *c;
1126
1127     c = vnm->device_class_registrations;
1128
1129     while (c)
1130       {
1131         c->index = vec_len (im->device_classes);
1132         hash_set_mem (im->device_class_by_name, c->name, c->index);
1133         vec_add1 (im->device_classes, c[0]);
1134         c = c->next_class_registration;
1135       }
1136   }
1137
1138   im->hw_interface_class_by_name = hash_create_string ( /* size */ 0,
1139                                                        sizeof (uword));
1140
1141   im->sw_if_index_by_sup_and_sub = hash_create_mem (0, sizeof (u64),
1142                                                     sizeof (uword));
1143   {
1144     vnet_hw_interface_class_t *c;
1145
1146     c = vnm->hw_interface_class_registrations;
1147
1148     while (c)
1149       {
1150         c->index = vec_len (im->hw_interface_classes);
1151         hash_set_mem (im->hw_interface_class_by_name, c->name, c->index);
1152
1153         if (NULL == c->build_rewrite)
1154           c->build_rewrite = default_build_rewrite;
1155         if (NULL == c->update_adjacency)
1156           c->update_adjacency = default_update_adjacency;
1157
1158         vec_add1 (im->hw_interface_classes, c[0]);
1159         c = c->next_class_registration;
1160       }
1161   }
1162
1163   {
1164     clib_error_t *error;
1165
1166     if ((error = vlib_call_init_function (vm, vnet_interface_cli_init)))
1167       return error;
1168
1169     return error;
1170   }
1171 }
1172
1173 VLIB_INIT_FUNCTION (vnet_interface_init);
1174
1175 /* Kludge to renumber interface names [only!] */
1176 int
1177 vnet_interface_name_renumber (u32 sw_if_index, u32 new_show_dev_instance)
1178 {
1179   int rv;
1180   vnet_main_t *vnm = vnet_get_main ();
1181   vnet_interface_main_t *im = &vnm->interface_main;
1182   vnet_hw_interface_t *hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
1183
1184   vnet_device_class_t *dev_class = vnet_get_device_class
1185     (vnm, hi->dev_class_index);
1186
1187   if (dev_class->name_renumber == 0 || dev_class->format_device_name == 0)
1188     return VNET_API_ERROR_UNIMPLEMENTED;
1189
1190   rv = dev_class->name_renumber (hi, new_show_dev_instance);
1191
1192   if (rv)
1193     return rv;
1194
1195   hash_unset_mem (im->hw_interface_by_name, hi->name);
1196   vec_free (hi->name);
1197   /* Use the mapping we set up to call it Ishmael */
1198   hi->name = format (0, "%U", dev_class->format_device_name,
1199                      hi->dev_instance);
1200
1201   hash_set_mem (im->hw_interface_by_name, hi->name, hi->hw_if_index);
1202   return rv;
1203 }
1204
1205 int
1206 vnet_interface_add_del_feature (vnet_main_t * vnm,
1207                                 vlib_main_t * vm,
1208                                 u32 sw_if_index,
1209                                 intf_output_feat_t feature, int is_add)
1210 {
1211   vnet_sw_interface_t *sw;
1212
1213   sw = vnet_get_sw_interface (vnm, sw_if_index);
1214
1215   if (is_add)
1216     {
1217
1218       sw->output_feature_bitmap |= (1 << feature);
1219       sw->output_feature_bitmap |= (1 << INTF_OUTPUT_FEAT_DONE);
1220
1221     }
1222   else
1223     {                           /* delete */
1224
1225       sw->output_feature_bitmap &= ~(1 << feature);
1226       if (sw->output_feature_bitmap == (1 << INTF_OUTPUT_FEAT_DONE))
1227         sw->output_feature_bitmap = 0;
1228
1229     }
1230   return 0;
1231 }
1232
1233 clib_error_t *
1234 vnet_rename_interface (vnet_main_t * vnm, u32 hw_if_index, char *new_name)
1235 {
1236   vnet_interface_main_t *im = &vnm->interface_main;
1237   vlib_main_t *vm = vnm->vlib_main;
1238   vnet_hw_interface_t *hw;
1239   u8 *old_name;
1240   clib_error_t *error = 0;
1241
1242   hw = vnet_get_hw_interface (vnm, hw_if_index);
1243   if (!hw)
1244     {
1245       return clib_error_return (0,
1246                                 "unable to find hw interface for index %u",
1247                                 hw_if_index);
1248     }
1249
1250   old_name = hw->name;
1251
1252   /* set new hw->name */
1253   hw->name = format (0, "%s", new_name);
1254
1255   /* remove the old name to hw_if_index mapping and install the new one */
1256   hash_unset_mem (im->hw_interface_by_name, old_name);
1257   hash_set_mem (im->hw_interface_by_name, hw->name, hw_if_index);
1258
1259   /* rename tx/output nodes */
1260   vlib_node_rename (vm, hw->tx_node_index, "%v-tx", hw->name);
1261   vlib_node_rename (vm, hw->output_node_index, "%v-output", hw->name);
1262
1263   /* free the old name vector */
1264   vec_free (old_name);
1265
1266   return error;
1267 }
1268
1269 static clib_error_t *
1270 vnet_hw_interface_change_mac_address_helper (vnet_main_t * vnm,
1271                                              u32 hw_if_index, u64 mac_address)
1272 {
1273   clib_error_t *error = 0;
1274   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1275
1276   if (hi->hw_address)
1277     {
1278       vnet_device_class_t *dev_class =
1279         vnet_get_device_class (vnm, hi->dev_class_index);
1280       if (dev_class->mac_addr_change_function)
1281         {
1282           error =
1283             dev_class->mac_addr_change_function (vnet_get_hw_interface
1284                                                  (vnm, hw_if_index),
1285                                                  (char *) &mac_address);
1286         }
1287       if (!error)
1288         {
1289           ethernet_main_t *em = &ethernet_main;
1290           ethernet_interface_t *ei =
1291             pool_elt_at_index (em->interfaces, hi->hw_instance);
1292
1293           vec_validate (hi->hw_address,
1294                         STRUCT_SIZE_OF (ethernet_header_t, src_address) - 1);
1295           clib_memcpy (hi->hw_address, &mac_address,
1296                        vec_len (hi->hw_address));
1297
1298           clib_memcpy (ei->address, (u8 *) & mac_address,
1299                        sizeof (ei->address));
1300           ethernet_arp_change_mac (vnm, hw_if_index);
1301           ethernet_ndp_change_mac (vnm->vlib_main, hw_if_index);
1302         }
1303       else
1304         {
1305           error =
1306             clib_error_return (0,
1307                                "MAC Address Change is not supported on this interface");
1308         }
1309     }
1310   else
1311     {
1312       error =
1313         clib_error_return (0,
1314                            "mac address change is not supported for interface index %u",
1315                            hw_if_index);
1316     }
1317   return error;
1318 }
1319
1320 clib_error_t *
1321 vnet_hw_interface_change_mac_address (vnet_main_t * vnm, u32 hw_if_index,
1322                                       u64 mac_address)
1323 {
1324   return vnet_hw_interface_change_mac_address_helper
1325     (vnm, hw_if_index, mac_address);
1326 }
1327
1328 vnet_l3_packet_type_t
1329 vnet_link_to_l3_proto (vnet_link_t link)
1330 {
1331   switch (link)
1332     {
1333     case VNET_LINK_IP4:
1334       return (VNET_L3_PACKET_TYPE_IP4);
1335     case VNET_LINK_IP6:
1336       return (VNET_L3_PACKET_TYPE_IP6);
1337     case VNET_LINK_MPLS:
1338       return (VNET_L3_PACKET_TYPE_MPLS_UNICAST);
1339     case VNET_LINK_ARP:
1340       return (VNET_L3_PACKET_TYPE_ARP);
1341     case VNET_LINK_ETHERNET:
1342       ASSERT (0);
1343       break;
1344     }
1345   ASSERT (0);
1346   return (0);
1347 }
1348
1349 u8 *
1350 default_build_rewrite (vnet_main_t * vnm,
1351                        u32 sw_if_index,
1352                        vnet_link_t link_type, const void *dst_address)
1353 {
1354   return (NULL);
1355 }
1356
1357 void
1358 default_update_adjacency (vnet_main_t * vnm, u32 sw_if_index, u32 ai)
1359 {
1360   u8 *rewrite;
1361
1362   rewrite = vnet_build_rewrite_for_sw_interface (vnm, sw_if_index,
1363                                                  adj_get_link_type (ai),
1364                                                  NULL);
1365
1366   adj_nbr_update_rewrite (ai, ADJ_NBR_REWRITE_FLAG_COMPLETE, rewrite);
1367 }
1368
1369
1370 /*
1371  * fd.io coding-style-patch-verification: ON
1372  *
1373  * Local Variables:
1374  * eval: (c-set-style "gnu")
1375  * End:
1376  */