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