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