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
 643   vlib_register_errors (vm, node_index,
 644                         dev_class->tx_function_n_errors,
 645                         dev_class->tx_function_error_strings);
 646 }
 647
 648 static void
 649 setup_output_node (vlib_main_t * vm,
 650                    u32 node_index, vnet_hw_interface_class_t * hw_class)
 651 {
 652   vlib_node_t *n = vlib_get_node (vm, node_index);
 653   n->format_buffer = hw_class->format_header;
 654   n->unformat_buffer = hw_class->unformat_header;
 655 }
 656
 657 /* Register an interface instance. */
 658 u32
 659 vnet_register_interface (vnet_main_t * vnm,
 660                          u32 dev_class_index,
 661                          u32 dev_instance,
 662                          u32 hw_class_index, u32 hw_instance)
 663 {
 664   vnet_interface_main_t *im = &vnm->interface_main;
 665   vnet_hw_interface_t *hw;
 666   vnet_device_class_t *dev_class =
 667     vnet_get_device_class (vnm, dev_class_index);
 668   vnet_hw_interface_class_t *hw_class =
 669     vnet_get_hw_interface_class (vnm, hw_class_index);
 670   vlib_main_t *vm = vnm->vlib_main;
 671   u32 hw_index;
 672   char *tx_node_name, *output_node_name;
 673
 674   pool_get (im->hw_interfaces, hw);
 675
 676   hw_index = hw - im->hw_interfaces;
 677   hw->hw_if_index = hw_index;
 678
 679   if (dev_class->format_device_name)
 680     hw->name = format (0, "%U", dev_class->format_device_name, dev_instance);
 681   else if (hw_class->format_interface_name)
 682     hw->name = format (0, "%U", hw_class->format_interface_name,
 683                        dev_instance);
 684   else
 685     hw->name = format (0, "%s%x", hw_class->name, dev_instance);
 686
 687   if (!im->hw_interface_by_name)
 688     im->hw_interface_by_name = hash_create_vec ( /* size */ 0,
 689                                                 sizeof (hw->name[0]),
 690                                                 sizeof (uword));
 691
 692   hash_set_mem (im->hw_interface_by_name, hw->name, hw_index);
 693
 694   /* Make hardware interface point to software interface. */
 695   {
 696     vnet_sw_interface_t sw;
 697
 698     memset (&sw, 0, sizeof (sw));
 699     sw.type = VNET_SW_INTERFACE_TYPE_HARDWARE;
 700     sw.hw_if_index = hw_index;
 701     hw->sw_if_index = vnet_create_sw_interface_no_callbacks (vnm, &sw);
 702   }
 703
 704   hw->dev_class_index = dev_class_index;
 705   hw->dev_instance = dev_instance;
 706   hw->hw_class_index = hw_class_index;
 707   hw->hw_instance = hw_instance;
 708
 709   hw->max_rate_bits_per_sec = 0;
 710   hw->min_packet_bytes = 0;
 711   hw->per_packet_overhead_bytes = 0;
 712   hw->max_l3_packet_bytes[VLIB_RX] = ~0;
 713   hw->max_l3_packet_bytes[VLIB_TX] = ~0;
 714
 715   tx_node_name = (char *) format (0, "%v-tx", hw->name);
 716   output_node_name = (char *) format (0, "%v-output", hw->name);
 717
 718   /* If we have previously deleted interface nodes, re-use them. */
 719   if (vec_len (im->deleted_hw_interface_nodes) > 0)
 720     {
 721       vnet_hw_interface_nodes_t *hn;
 722       vnet_interface_output_runtime_t *rt;
 723
 724       hn = vec_end (im->deleted_hw_interface_nodes) - 1;
 725
 726       hw->tx_node_index = hn->tx_node_index;
 727       hw->output_node_index = hn->output_node_index;
 728
 729       vlib_node_rename (vm, hw->tx_node_index, "%v", tx_node_name);
 730       vlib_node_rename (vm, hw->output_node_index, "%v", output_node_name);
 731
 732       rt = vlib_node_get_runtime_data (vm, hw->output_node_index);
 733       ASSERT (rt->is_deleted == 1);
 734       rt->is_deleted = 0;
 735       rt->hw_if_index = hw_index;
 736       rt->sw_if_index = hw->sw_if_index;
 737       rt->dev_instance = hw->dev_instance;
 738
 739       rt = vlib_node_get_runtime_data (vm, hw->tx_node_index);
 740       rt->hw_if_index = hw_index;
 741       rt->sw_if_index = hw->sw_if_index;
 742       rt->dev_instance = hw->dev_instance;
 743
 744       vlib_worker_thread_node_runtime_update ();
 745       _vec_len (im->deleted_hw_interface_nodes) -= 1;
 746     }
 747   else
 748     {
 749       vlib_node_registration_t r;
 750       vnet_interface_output_runtime_t rt = {
 751         .hw_if_index = hw_index,
 752         .sw_if_index = hw->sw_if_index,
 753         .dev_instance = hw->dev_instance,
 754         .is_deleted = 0,
 755       };
 756
 757       memset (&r, 0, sizeof (r));
 758       r.type = VLIB_NODE_TYPE_INTERNAL;
 759       r.runtime_data = &rt;
 760       r.runtime_data_bytes = sizeof (rt);
 761       r.scalar_size = 0;
 762       r.vector_size = sizeof (u32);
 763
 764       r.flags = VLIB_NODE_FLAG_IS_OUTPUT;
 765       r.name = tx_node_name;
 766       r.function = dev_class->tx_function;
 767
 768       hw->tx_node_index = vlib_register_node (vm, &r);
 769
 770       vlib_node_add_named_next_with_slot (vm, hw->tx_node_index,
 771                                           "error-drop",
 772                                           VNET_INTERFACE_TX_NEXT_DROP);
 773
 774       r.flags = 0;
 775       r.name = output_node_name;
 776       r.function = dev_class->no_flatten_output_chains ?
 777         vnet_interface_output_node_no_flatten_multiarch_select () :
 778         vnet_interface_output_node_multiarch_select ();
 779       r.format_trace = format_vnet_interface_output_trace;
 780
 781       {
 782         static char *e[] = {
 783           "interface is down",
 784           "interface is deleted",
 785         };
 786
 787         r.n_errors = ARRAY_LEN (e);
 788         r.error_strings = e;
 789       }
 790       hw->output_node_index = vlib_register_node (vm, &r);
 791
 792 #define _(sym,str) vlib_node_add_named_next_with_slot (vm, \
 793                      hw->output_node_index, str,           \
 794                      VNET_INTERFACE_OUTPUT_NEXT_##sym);
 795       foreach_intf_output_feat
 796 #undef _
 797         vlib_node_add_named_next_with_slot (vm, hw->output_node_index,
 798                                             "error-drop",
 799                                             VNET_INTERFACE_OUTPUT_NEXT_DROP);
 800       vlib_node_add_next_with_slot (vm, hw->output_node_index,
 801                                     hw->tx_node_index,
 802                                     VNET_INTERFACE_OUTPUT_NEXT_TX);
 803     }
 804
 805   setup_output_node (vm, hw->output_node_index, hw_class);
 806   setup_tx_node (vm, hw->tx_node_index, dev_class);
 807
 808   /* Call all up/down callbacks with zero flags when interface is created. */
 809   vnet_sw_interface_set_flags_helper (vnm, hw->sw_if_index, /* flags */ 0,
 810                                       VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE);
 811   vnet_hw_interface_set_flags_helper (vnm, hw_index, /* flags */ 0,
 812                                       VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE);
 813
 814   return hw_index;
 815 }
 816
 817 void
 818 vnet_delete_hw_interface (vnet_main_t * vnm, u32 hw_if_index)
 819 {
 820   vnet_interface_main_t *im = &vnm->interface_main;
 821   vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
 822   vlib_main_t *vm = vnm->vlib_main;
 823
 824   /* If it is up, mark it down. */
 825   if (hw->flags != 0)
 826     vnet_hw_interface_set_flags (vnm, hw_if_index, /* flags */ 0);
 827
 828   /* Call delete callbacks. */
 829   call_hw_interface_add_del_callbacks (vnm, hw_if_index, /* is_create */ 0);
 830
 831   /* Delete software interface corresponding to hardware interface. */
 832   vnet_delete_sw_interface (vnm, hw->sw_if_index);
 833
 834   /* Delete any sub-interfaces. */
 835   {
 836     u32 id, sw_if_index;
 837     /* *INDENT-OFF* */
 838     hash_foreach (id, sw_if_index, hw->sub_interface_sw_if_index_by_id, ({
 839       vnet_delete_sw_interface (vnm, sw_if_index);
 840     }));
 841     /* *INDENT-ON* */
 842   }
 843
 844   {
 845     vnet_hw_interface_nodes_t *dn;
 846     vnet_interface_output_runtime_t *rt =
 847       vlib_node_get_runtime_data (vm, hw->output_node_index);
 848
 849     /* Mark node runtime as deleted so output node (if called) will drop packets. */
 850     rt->is_deleted = 1;
 851
 852     vlib_node_rename (vm, hw->output_node_index,
 853                       "interface-%d-output-deleted", hw_if_index);
 854     vlib_node_rename (vm, hw->tx_node_index, "interface-%d-tx-deleted",
 855                       hw_if_index);
 856     vec_add2 (im->deleted_hw_interface_nodes, dn, 1);
 857     dn->tx_node_index = hw->tx_node_index;
 858     dn->output_node_index = hw->output_node_index;
 859   }
 860
 861   hash_unset_mem (im->hw_interface_by_name, hw->name);
 862   vec_free (hw->name);
 863
 864   pool_put (im->hw_interfaces, hw);
 865 }
 866
 867 static void
 868 serialize_vnet_hw_interface_set_class (serialize_main_t * m, va_list * va)
 869 {
 870   u32 hw_if_index = va_arg (*va, u32);
 871   char *hw_class_name = va_arg (*va, char *);
 872   serialize_integer (m, hw_if_index, sizeof (hw_if_index));
 873   serialize_cstring (m, hw_class_name);
 874 }
 875
 876 static void
 877 unserialize_vnet_hw_interface_set_class (serialize_main_t * m, va_list * va)
 878 {
 879   CLIB_UNUSED (mc_main_t * mc) = va_arg (*va, mc_main_t *);
 880   vnet_main_t *vnm = vnet_get_main ();
 881   u32 hw_if_index;
 882   char *hw_class_name;
 883   uword *p;
 884   clib_error_t *error;
 885
 886   unserialize_integer (m, &hw_if_index, sizeof (hw_if_index));
 887   unserialize_cstring (m, &hw_class_name);
 888   p =
 889     hash_get (vnm->interface_main.hw_interface_class_by_name, hw_class_name);
 890   ASSERT (p != 0);
 891   error = vnet_hw_interface_set_class_helper (vnm, hw_if_index, p[0],
 892                                               /* redistribute */ 0);
 893   if (error)
 894     clib_error_report (error);
 895 }
 896
 897 MC_SERIALIZE_MSG (vnet_hw_interface_set_class_msg, static) =
 898 {
 899 .name = "vnet_hw_interface_set_class",.serialize =
 900     serialize_vnet_hw_interface_set_class,.unserialize =
 901     unserialize_vnet_hw_interface_set_class,};
 902
 903 void
 904 vnet_hw_interface_init_for_class (vnet_main_t * vnm, u32 hw_if_index,
 905                                   u32 hw_class_index, u32 hw_instance)
 906 {
 907   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
 908   vnet_hw_interface_class_t *hc =
 909     vnet_get_hw_interface_class (vnm, hw_class_index);
 910
 911   hi->hw_class_index = hw_class_index;
 912   hi->hw_instance = hw_instance;
 913   setup_output_node (vnm->vlib_main, hi->output_node_index, hc);
 914 }
 915
 916 static clib_error_t *
 917 vnet_hw_interface_set_class_helper (vnet_main_t * vnm, u32 hw_if_index,
 918                                     u32 hw_class_index, u32 redistribute)
 919 {
 920   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
 921   vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, hi->sw_if_index);
 922   vnet_hw_interface_class_t *old_class =
 923     vnet_get_hw_interface_class (vnm, hi->hw_class_index);
 924   vnet_hw_interface_class_t *new_class =
 925     vnet_get_hw_interface_class (vnm, hw_class_index);
 926   vnet_device_class_t *dev_class =
 927     vnet_get_device_class (vnm, hi->dev_class_index);
 928   clib_error_t *error = 0;
 929
 930   /* New class equals old class?  Nothing to do. */
 931   if (hi->hw_class_index == hw_class_index)
 932     return 0;
 933
 934   /* No need (and incorrect since admin up flag may be set) to do error checking when
 935      receiving unserialize message. */
 936   if (redistribute)
 937     {
 938       if (si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
 939         return clib_error_return (0,
 940                                   "%v must be admin down to change class from %s to %s",
 941                                   hi->name, old_class->name, new_class->name);
 942
 943       /* Make sure interface supports given class. */
 944       if ((new_class->is_valid_class_for_interface
 945            && !new_class->is_valid_class_for_interface (vnm, hw_if_index,
 946                                                         hw_class_index))
 947           || (dev_class->is_valid_class_for_interface
 948               && !dev_class->is_valid_class_for_interface (vnm, hw_if_index,
 949                                                            hw_class_index)))
 950         return clib_error_return (0,
 951                                   "%v class cannot be changed from %s to %s",
 952                                   hi->name, old_class->name, new_class->name);
 953
 954       if (vnm->vlib_main->mc_main)
 955         {
 956           mc_serialize (vnm->vlib_main->mc_main,
 957                         &vnet_hw_interface_set_class_msg, hw_if_index,
 958                         new_class->name);
 959           return 0;
 960         }
 961     }
 962
 963   if (old_class->hw_class_change)
 964     old_class->hw_class_change (vnm, hw_if_index, old_class->index,
 965                                 new_class->index);
 966
 967   vnet_hw_interface_init_for_class (vnm, hw_if_index, new_class->index,
 968                                     /* instance */ ~0);
 969
 970   if (new_class->hw_class_change)
 971     new_class->hw_class_change (vnm, hw_if_index, old_class->index,
 972                                 new_class->index);
 973
 974   if (dev_class->hw_class_change)
 975     dev_class->hw_class_change (vnm, hw_if_index, new_class->index);
 976
 977   return error;
 978 }
 979
 980 clib_error_t *
 981 vnet_hw_interface_set_class (vnet_main_t * vnm, u32 hw_if_index,
 982                              u32 hw_class_index)
 983 {
 984   return vnet_hw_interface_set_class_helper (vnm, hw_if_index, hw_class_index,
 985                                              /* redistribute */ 1);
 986 }
 987
 988 static int
 989 vnet_hw_interface_rx_redirect_to_node_helper (vnet_main_t * vnm,
 990                                               u32 hw_if_index,
 991                                               u32 node_index,
 992                                               u32 redistribute)
 993 {
 994   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
 995   vnet_device_class_t *dev_class = vnet_get_device_class
 996     (vnm, hi->dev_class_index);
 997
 998   if (redistribute)
 999     {
1000       /* $$$$ fixme someday maybe */
1001       ASSERT (vnm->vlib_main->mc_main == 0);
1002     }
1003   if (dev_class->rx_redirect_to_node)
1004     {
1005       dev_class->rx_redirect_to_node (vnm, hw_if_index, node_index);
1006       return 0;
1007     }
1008
1009   return VNET_API_ERROR_UNIMPLEMENTED;
1010 }
1011
1012 int
1013 vnet_hw_interface_rx_redirect_to_node (vnet_main_t * vnm, u32 hw_if_index,
1014                                        u32 node_index)
1015 {
1016   return vnet_hw_interface_rx_redirect_to_node_helper (vnm, hw_if_index,
1017                                                        node_index,
1018                                                        1 /* redistribute */ );
1019 }
1020
1021 word
1022 vnet_sw_interface_compare (vnet_main_t * vnm,
1023                            uword sw_if_index0, uword sw_if_index1)
1024 {
1025   vnet_sw_interface_t *sup0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1026   vnet_sw_interface_t *sup1 = vnet_get_sup_sw_interface (vnm, sw_if_index1);
1027   vnet_hw_interface_t *h0 = vnet_get_hw_interface (vnm, sup0->hw_if_index);
1028   vnet_hw_interface_t *h1 = vnet_get_hw_interface (vnm, sup1->hw_if_index);
1029
1030   if (h0 != h1)
1031     return vec_cmp (h0->name, h1->name);
1032   return (word) h0->hw_instance - (word) h1->hw_instance;
1033 }
1034
1035 word
1036 vnet_hw_interface_compare (vnet_main_t * vnm,
1037                            uword hw_if_index0, uword hw_if_index1)
1038 {
1039   vnet_hw_interface_t *h0 = vnet_get_hw_interface (vnm, hw_if_index0);
1040   vnet_hw_interface_t *h1 = vnet_get_hw_interface (vnm, hw_if_index1);
1041
1042   if (h0 != h1)
1043     return vec_cmp (h0->name, h1->name);
1044   return (word) h0->hw_instance - (word) h1->hw_instance;
1045 }
1046
1047 clib_error_t *
1048 vnet_interface_init (vlib_main_t * vm)
1049 {
1050   vnet_main_t *vnm = vnet_get_main ();
1051   vnet_interface_main_t *im = &vnm->interface_main;
1052   vlib_buffer_t *b = 0;
1053   vnet_buffer_opaque_t *o = 0;
1054
1055   /*
1056    * Keep people from shooting themselves in the foot.
1057    */
1058   if (sizeof (b->opaque) != sizeof (vnet_buffer_opaque_t))
1059     {
1060 #define _(a) if (sizeof(o->a) > sizeof (o->unused))                     \
1061       clib_warning                                                      \
1062         ("FATAL: size of opaque union subtype %s is %d (max %d)",       \
1063          #a, sizeof(o->a), sizeof (o->unused));
1064       foreach_buffer_opaque_union_subtype;
1065 #undef _
1066
1067       return clib_error_return
1068         (0, "FATAL: size of vlib buffer opaque %d, size of vnet opaque %d",
1069          sizeof (b->opaque), sizeof (vnet_buffer_opaque_t));
1070     }
1071
1072   im->sw_if_counter_lock = clib_mem_alloc_aligned (CLIB_CACHE_LINE_BYTES,
1073                                                    CLIB_CACHE_LINE_BYTES);
1074   im->sw_if_counter_lock[0] = 1;        /* should be no need */
1075
1076   vec_validate (im->sw_if_counters, VNET_N_SIMPLE_INTERFACE_COUNTER - 1);
1077   im->sw_if_counters[VNET_INTERFACE_COUNTER_DROP].name = "drops";
1078   im->sw_if_counters[VNET_INTERFACE_COUNTER_PUNT].name = "punts";
1079   im->sw_if_counters[VNET_INTERFACE_COUNTER_IP4].name = "ip4";
1080   im->sw_if_counters[VNET_INTERFACE_COUNTER_IP6].name = "ip6";
1081   im->sw_if_counters[VNET_INTERFACE_COUNTER_RX_NO_BUF].name = "rx-no-buf";
1082   im->sw_if_counters[VNET_INTERFACE_COUNTER_RX_MISS].name = "rx-miss";
1083   im->sw_if_counters[VNET_INTERFACE_COUNTER_RX_ERROR].name = "rx-error";
1084   im->sw_if_counters[VNET_INTERFACE_COUNTER_TX_ERROR].name = "tx-error";
1085
1086   vec_validate (im->combined_sw_if_counters,
1087                 VNET_N_COMBINED_INTERFACE_COUNTER - 1);
1088   im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_RX].name = "rx";
1089   im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_TX].name = "tx";
1090
1091   im->sw_if_counter_lock[0] = 0;
1092
1093   im->device_class_by_name = hash_create_string ( /* size */ 0,
1094                                                  sizeof (uword));
1095   {
1096     vnet_device_class_t *c;
1097
1098     c = vnm->device_class_registrations;
1099
1100     while (c)
1101       {
1102         c->index = vec_len (im->device_classes);
1103         hash_set_mem (im->device_class_by_name, c->name, c->index);
1104         vec_add1 (im->device_classes, c[0]);
1105         c = c->next_class_registration;
1106       }
1107   }
1108
1109   im->hw_interface_class_by_name = hash_create_string ( /* size */ 0,
1110                                                        sizeof (uword));
1111
1112   im->sw_if_index_by_sup_and_sub = hash_create_mem (0, sizeof (u64),
1113                                                     sizeof (uword));
1114   {
1115     vnet_hw_interface_class_t *c;
1116
1117     c = vnm->hw_interface_class_registrations;
1118
1119     while (c)
1120       {
1121         c->index = vec_len (im->hw_interface_classes);
1122         hash_set_mem (im->hw_interface_class_by_name, c->name, c->index);
1123         vec_add1 (im->hw_interface_classes, c[0]);
1124         c = c->next_class_registration;
1125       }
1126   }
1127
1128   {
1129     clib_error_t *error;
1130
1131     if ((error = vlib_call_init_function (vm, vnet_interface_cli_init)))
1132       return error;
1133
1134     return error;
1135   }
1136 }
1137
1138 VLIB_INIT_FUNCTION (vnet_interface_init);
1139
1140 /* Kludge to renumber interface names [only!] */
1141 int
1142 vnet_interface_name_renumber (u32 sw_if_index, u32 new_show_dev_instance)
1143 {
1144   int rv;
1145   vnet_main_t *vnm = vnet_get_main ();
1146   vnet_interface_main_t *im = &vnm->interface_main;
1147   vnet_hw_interface_t *hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
1148
1149   vnet_device_class_t *dev_class = vnet_get_device_class
1150     (vnm, hi->dev_class_index);
1151
1152   if (dev_class->name_renumber == 0 || dev_class->format_device_name == 0)
1153     return VNET_API_ERROR_UNIMPLEMENTED;
1154
1155   rv = dev_class->name_renumber (hi, new_show_dev_instance);
1156
1157   if (rv)
1158     return rv;
1159
1160   hash_unset_mem (im->hw_interface_by_name, hi->name);
1161   vec_free (hi->name);
1162   /* Use the mapping we set up to call it Ishmael */
1163   hi->name = format (0, "%U", dev_class->format_device_name,
1164                      hi->dev_instance);
1165
1166   hash_set_mem (im->hw_interface_by_name, hi->name, hi->hw_if_index);
1167   return rv;
1168 }
1169
1170 int
1171 vnet_interface_add_del_feature (vnet_main_t * vnm,
1172                                 vlib_main_t * vm,
1173                                 u32 sw_if_index,
1174                                 intf_output_feat_t feature, int is_add)
1175 {
1176   vnet_sw_interface_t *sw;
1177
1178   sw = vnet_get_sw_interface (vnm, sw_if_index);
1179
1180   if (is_add)
1181     {
1182
1183       sw->output_feature_bitmap |= (1 << feature);
1184       sw->output_feature_bitmap |= (1 << INTF_OUTPUT_FEAT_DONE);
1185
1186     }
1187   else
1188     {                           /* delete */
1189
1190       sw->output_feature_bitmap &= ~(1 << feature);
1191       if (sw->output_feature_bitmap == (1 << INTF_OUTPUT_FEAT_DONE))
1192         sw->output_feature_bitmap = 0;
1193
1194     }
1195   return 0;
1196 }
1197
1198 clib_error_t *
1199 vnet_rename_interface (vnet_main_t * vnm, u32 hw_if_index, char *new_name)
1200 {
1201   vnet_interface_main_t *im = &vnm->interface_main;
1202   vlib_main_t *vm = vnm->vlib_main;
1203   vnet_hw_interface_t *hw;
1204   u8 *old_name;
1205   clib_error_t *error = 0;
1206
1207   hw = vnet_get_hw_interface (vnm, hw_if_index);
1208   if (!hw)
1209     {
1210       return clib_error_return (0,
1211                                 "unable to find hw interface for index %u",
1212                                 hw_if_index);
1213     }
1214
1215   old_name = hw->name;
1216
1217   /* set new hw->name */
1218   hw->name = format (0, "%s", new_name);
1219
1220   /* remove the old name to hw_if_index mapping and install the new one */
1221   hash_unset_mem (im->hw_interface_by_name, old_name);
1222   hash_set_mem (im->hw_interface_by_name, hw->name, hw_if_index);
1223
1224   /* rename tx/output nodes */
1225   vlib_node_rename (vm, hw->tx_node_index, "%v-tx", hw->name);
1226   vlib_node_rename (vm, hw->output_node_index, "%v-output", hw->name);
1227
1228   /* free the old name vector */
1229   vec_free (old_name);
1230
1231   return error;
1232 }
1233
1234 static clib_error_t *
1235 vnet_hw_interface_change_mac_address_helper (vnet_main_t * vnm,
1236                                              u32 hw_if_index, u64 mac_address)
1237 {
1238   clib_error_t *error = 0;
1239   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1240
1241   if (hi->hw_address)
1242     {
1243       vnet_device_class_t *dev_class =
1244         vnet_get_device_class (vnm, hi->dev_class_index);
1245       if (dev_class->mac_addr_change_function)
1246         {
1247           error =
1248             dev_class->mac_addr_change_function (vnet_get_hw_interface
1249                                                  (vnm, hw_if_index),
1250                                                  (char *) &mac_address);
1251         }
1252       if (!error)
1253         {
1254           ethernet_main_t *em = &ethernet_main;
1255           ethernet_interface_t *ei =
1256             pool_elt_at_index (em->interfaces, hi->hw_instance);
1257
1258           clib_memcpy (hi->hw_address, (u8 *) & mac_address,
1259                        sizeof (hi->hw_address));
1260           clib_memcpy (ei->address, (u8 *) & mac_address,
1261                        sizeof (ei->address));
1262           ethernet_arp_change_mac (vnm, hw_if_index);
1263           ethernet_ndp_change_mac (vnm->vlib_main, hw_if_index);
1264         }
1265       else
1266         {
1267           error =
1268             clib_error_return (0,
1269                                "MAC Address Change is not supported on this interface");
1270         }
1271     }
1272   else
1273     {
1274       error =
1275         clib_error_return (0,
1276                            "mac address change is not supported for interface index %u",
1277                            hw_if_index);
1278     }
1279   return error;
1280 }
1281
1282 clib_error_t *
1283 vnet_hw_interface_change_mac_address (vnet_main_t * vnm, u32 hw_if_index,
1284                                       u64 mac_address)
1285 {
1286   return vnet_hw_interface_change_mac_address_helper
1287     (vnm, hw_if_index, mac_address);
1288 }
1289
1290 /*
1291  * fd.io coding-style-patch-verification: ON
1292  *
1293  * Local Variables:
1294  * eval: (c-set-style "gnu")
1295  * End:
1296  */