src/vnet/interface.c

   1 /*
   2  * Copyright (c) 2015 Cisco and/or its affiliates.
   3  * Licensed under the Apache License, Version 2.0 (the "License");
   4  * you may not use this file except in compliance with the License.
   5  * You may obtain a copy of the License at:
   6  *
   7  *     http://www.apache.org/licenses/LICENSE-2.0
   8  *
   9  * Unless required by applicable law or agreed to in writing, software
  10  * distributed under the License is distributed on an "AS IS" BASIS,
  11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12  * See the License for the specific language governing permissions and
  13  * limitations under the License.
  14  */
  15 /*
  16  * interface.c: VNET interfaces/sub-interfaces
  17  *
  18  * Copyright (c) 2008 Eliot Dresselhaus
  19  *
  20  * Permission is hereby granted, free of charge, to any person obtaining
  21  * a copy of this software and associated documentation files (the
  22  * "Software"), to deal in the Software without restriction, including
  23  * without limitation the rights to use, copy, modify, merge, publish,
  24  * distribute, sublicense, and/or sell copies of the Software, and to
  25  * permit persons to whom the Software is furnished to do so, subject to
  26  * the following conditions:
  27  *
  28  * The above copyright notice and this permission notice shall be
  29  * included in all copies or substantial portions of the Software.
  30  *
  31  *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  32  *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  33  *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  34  *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  35  *  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  36  *  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  37  *  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  38  */
  39
  40 #include <vnet/vnet.h>
  41 #include <vnet/plugin/plugin.h>
  42 #include <vnet/fib/ip6_fib.h>
  43 #include <vnet/adj/adj.h>
  44 #include <vnet/adj/adj_mcast.h>
  45
  46 #define VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE (1 << 0)
  47 #define VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE (1 << 1)
  48
  49 static clib_error_t *vnet_hw_interface_set_flags_helper (vnet_main_t * vnm,
  50                                                          u32 hw_if_index,
  51                                                          u32 flags,
  52                                                          u32 helper_flags);
  53
  54 static clib_error_t *vnet_sw_interface_set_flags_helper (vnet_main_t * vnm,
  55                                                          u32 sw_if_index,
  56                                                          u32 flags,
  57                                                          u32 helper_flags);
  58
  59 static clib_error_t *vnet_hw_interface_set_class_helper (vnet_main_t * vnm,
  60                                                          u32 hw_if_index,
  61                                                          u32 hw_class_index,
  62                                                          u32 redistribute);
  63
  64 typedef struct
  65 {
  66   /* Either sw or hw interface index. */
  67   u32 sw_hw_if_index;
  68
  69   /* Flags. */
  70   u32 flags;
  71 } vnet_sw_hw_interface_state_t;
  72
  73 static void
  74 serialize_vec_vnet_sw_hw_interface_state (serialize_main_t * m, va_list * va)
  75 {
  76   vnet_sw_hw_interface_state_t *s =
  77     va_arg (*va, vnet_sw_hw_interface_state_t *);
  78   u32 n = va_arg (*va, u32);
  79   u32 i;
  80   for (i = 0; i < n; i++)
  81     {
  82       serialize_integer (m, s[i].sw_hw_if_index,
  83                          sizeof (s[i].sw_hw_if_index));
  84       serialize_integer (m, s[i].flags, sizeof (s[i].flags));
  85     }
  86 }
  87
  88 static void
  89 unserialize_vec_vnet_sw_hw_interface_state (serialize_main_t * m,
  90                                             va_list * va)
  91 {
  92   vnet_sw_hw_interface_state_t *s =
  93     va_arg (*va, vnet_sw_hw_interface_state_t *);
  94   u32 n = va_arg (*va, u32);
  95   u32 i;
  96   for (i = 0; i < n; i++)
  97     {
  98       unserialize_integer (m, &s[i].sw_hw_if_index,
  99                            sizeof (s[i].sw_hw_if_index));
 100       unserialize_integer (m, &s[i].flags, sizeof (s[i].flags));
 101     }
 102 }
 103
 104 static void
 105 serialize_vnet_sw_hw_interface_set_flags (serialize_main_t * m, va_list * va)
 106 {
 107   vnet_sw_hw_interface_state_t *s =
 108     va_arg (*va, vnet_sw_hw_interface_state_t *);
 109   serialize (m, serialize_vec_vnet_sw_hw_interface_state, s, 1);
 110 }
 111
 112 static void
 113 unserialize_vnet_sw_interface_set_flags (serialize_main_t * m, va_list * va)
 114 {
 115   CLIB_UNUSED (mc_main_t * mc) = va_arg (*va, mc_main_t *);
 116   vnet_sw_hw_interface_state_t s;
 117
 118   unserialize (m, unserialize_vec_vnet_sw_hw_interface_state, &s, 1);
 119
 120   vnet_sw_interface_set_flags_helper
 121     (vnet_get_main (), s.sw_hw_if_index, s.flags,
 122      /* helper_flags no redistribution */ 0);
 123 }
 124
 125 void
 126 vnet_hw_interface_set_mtu (vnet_main_t * vnm, u32 hw_if_index, u32 mtu)
 127 {
 128   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
 129
 130   if (hi->max_packet_bytes != mtu)
 131     {
 132       u16 l3_pad = hi->max_packet_bytes - hi->max_l3_packet_bytes[VLIB_TX];
 133       hi->max_packet_bytes = mtu;
 134       hi->max_l3_packet_bytes[VLIB_TX] =
 135         hi->max_l3_packet_bytes[VLIB_RX] = mtu - l3_pad;
 136       ethernet_set_flags (vnm, hw_if_index, ETHERNET_INTERFACE_FLAG_MTU);
 137       adj_mtu_update (hw_if_index);
 138     }
 139 }
 140
 141 static void
 142 unserialize_vnet_hw_interface_set_flags (serialize_main_t * m, va_list * va)
 143 {
 144   CLIB_UNUSED (mc_main_t * mc) = va_arg (*va, mc_main_t *);
 145   vnet_sw_hw_interface_state_t s;
 146
 147   unserialize (m, unserialize_vec_vnet_sw_hw_interface_state, &s, 1);
 148
 149   vnet_hw_interface_set_flags_helper
 150     (vnet_get_main (), s.sw_hw_if_index, s.flags,
 151      /* helper_flags no redistribution */ 0);
 152 }
 153
 154 MC_SERIALIZE_MSG (vnet_sw_interface_set_flags_msg, static) =
 155 {
 156 .name = "vnet_sw_interface_set_flags",.serialize =
 157     serialize_vnet_sw_hw_interface_set_flags,.unserialize =
 158     unserialize_vnet_sw_interface_set_flags,};
 159
 160 MC_SERIALIZE_MSG (vnet_hw_interface_set_flags_msg, static) =
 161 {
 162 .name = "vnet_hw_interface_set_flags",.serialize =
 163     serialize_vnet_sw_hw_interface_set_flags,.unserialize =
 164     unserialize_vnet_hw_interface_set_flags,};
 165
 166 void
 167 serialize_vnet_interface_state (serialize_main_t * m, va_list * va)
 168 {
 169   vnet_main_t *vnm = va_arg (*va, vnet_main_t *);
 170   vnet_sw_hw_interface_state_t *sts = 0, *st;
 171   vnet_sw_interface_t *sif;
 172   vnet_hw_interface_t *hif;
 173   vnet_interface_main_t *im = &vnm->interface_main;
 174
 175   /* Serialize hardware interface classes since they may have changed.
 176      Must do this before sending up/down flags. */
 177   /* *INDENT-OFF* */
 178   pool_foreach (hif, im->hw_interfaces, ({
 179     vnet_hw_interface_class_t * hw_class = vnet_get_hw_interface_class (vnm, hif->hw_class_index);
 180     serialize_cstring (m, hw_class->name);
 181   }));
 182   /* *INDENT-ON* */
 183
 184   /* Send sw/hw interface state when non-zero. */
 185   /* *INDENT-OFF* */
 186   pool_foreach (sif, im->sw_interfaces, ({
 187     if (sif->flags != 0)
 188       {
 189         vec_add2 (sts, st, 1);
 190         st->sw_hw_if_index = sif->sw_if_index;
 191         st->flags = sif->flags;
 192       }
 193   }));
 194   /* *INDENT-ON* */
 195
 196   vec_serialize (m, sts, serialize_vec_vnet_sw_hw_interface_state);
 197
 198   if (sts)
 199     _vec_len (sts) = 0;
 200
 201   /* *INDENT-OFF* */
 202   pool_foreach (hif, im->hw_interfaces, ({
 203     if (hif->flags != 0)
 204       {
 205         vec_add2 (sts, st, 1);
 206         st->sw_hw_if_index = hif->hw_if_index;
 207         st->flags = hif->flags;
 208       }
 209   }));
 210   /* *INDENT-ON* */
 211
 212   vec_serialize (m, sts, serialize_vec_vnet_sw_hw_interface_state);
 213
 214   vec_free (sts);
 215 }
 216
 217 void
 218 unserialize_vnet_interface_state (serialize_main_t * m, va_list * va)
 219 {
 220   vnet_main_t *vnm = va_arg (*va, vnet_main_t *);
 221   vnet_sw_hw_interface_state_t *sts = 0, *st;
 222
 223   /* First set interface hardware class. */
 224   {
 225     vnet_interface_main_t *im = &vnm->interface_main;
 226     vnet_hw_interface_t *hif;
 227     char *class_name;
 228     uword *p;
 229     clib_error_t *error;
 230
 231     /* *INDENT-OFF* */
 232     pool_foreach (hif, im->hw_interfaces, ({
 233       unserialize_cstring (m, &class_name);
 234       p = hash_get_mem (im->hw_interface_class_by_name, class_name);
 235       ASSERT (p != 0);
 236       error = vnet_hw_interface_set_class_helper (vnm, hif->hw_if_index, p[0], /* redistribute */ 0);
 237       if (error)
 238         clib_error_report (error);
 239       vec_free (class_name);
 240     }));
 241     /* *INDENT-ON* */
 242   }
 243
 244   vec_unserialize (m, &sts, unserialize_vec_vnet_sw_hw_interface_state);
 245   vec_foreach (st, sts)
 246     vnet_sw_interface_set_flags_helper (vnm, st->sw_hw_if_index, st->flags,
 247                                         /* no distribute */ 0);
 248   vec_free (sts);
 249
 250   vec_unserialize (m, &sts, unserialize_vec_vnet_sw_hw_interface_state);
 251   vec_foreach (st, sts)
 252     vnet_hw_interface_set_flags_helper (vnm, st->sw_hw_if_index, st->flags,
 253                                         /* no distribute */ 0);
 254   vec_free (sts);
 255 }
 256
 257 static clib_error_t *
 258 call_elf_section_interface_callbacks (vnet_main_t * vnm, u32 if_index,
 259                                       u32 flags,
 260                                       _vnet_interface_function_list_elt_t **
 261                                       elts)
 262 {
 263   _vnet_interface_function_list_elt_t *elt;
 264   vnet_interface_function_priority_t prio;
 265   clib_error_t *error = 0;
 266
 267   for (prio = VNET_ITF_FUNC_PRIORITY_LOW;
 268        prio <= VNET_ITF_FUNC_PRIORITY_HIGH; prio++)
 269     {
 270       elt = elts[prio];
 271
 272       while (elt)
 273         {
 274           error = elt->fp (vnm, if_index, flags);
 275           if (error)
 276             return error;
 277           elt = elt->next_interface_function;
 278         }
 279     }
 280   return error;
 281 }
 282
 283 static clib_error_t *
 284 call_hw_interface_add_del_callbacks (vnet_main_t * vnm, u32 hw_if_index,
 285                                      u32 is_create)
 286 {
 287   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
 288   vnet_hw_interface_class_t *hw_class =
 289     vnet_get_hw_interface_class (vnm, hi->hw_class_index);
 290   vnet_device_class_t *dev_class =
 291     vnet_get_device_class (vnm, hi->dev_class_index);
 292   clib_error_t *error = 0;
 293
 294   if (hw_class->interface_add_del_function
 295       && (error =
 296           hw_class->interface_add_del_function (vnm, hw_if_index, is_create)))
 297     return error;
 298
 299   if (dev_class->interface_add_del_function
 300       && (error =
 301           dev_class->interface_add_del_function (vnm, hw_if_index,
 302                                                  is_create)))
 303     return error;
 304
 305   error = call_elf_section_interface_callbacks
 306     (vnm, hw_if_index, is_create, vnm->hw_interface_add_del_functions);
 307
 308   return error;
 309 }
 310
 311 static clib_error_t *
 312 call_sw_interface_add_del_callbacks (vnet_main_t * vnm, u32 sw_if_index,
 313                                      u32 is_create)
 314 {
 315   return call_elf_section_interface_callbacks
 316     (vnm, sw_if_index, is_create, vnm->sw_interface_add_del_functions);
 317 }
 318
 319 #define VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE (1 << 0)
 320 #define VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE (1 << 1)
 321
 322 static clib_error_t *
 323 vnet_hw_interface_set_flags_helper (vnet_main_t * vnm, u32 hw_if_index,
 324                                     u32 flags, u32 helper_flags)
 325 {
 326   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
 327   vnet_hw_interface_class_t *hw_class =
 328     vnet_get_hw_interface_class (vnm, hi->hw_class_index);
 329   vnet_device_class_t *dev_class =
 330     vnet_get_device_class (vnm, hi->dev_class_index);
 331   vlib_main_t *vm = vnm->vlib_main;
 332   u32 mask;
 333   clib_error_t *error = 0;
 334   u32 is_create =
 335     (helper_flags & VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE) != 0;
 336
 337   mask =
 338     (VNET_HW_INTERFACE_FLAG_LINK_UP | VNET_HW_INTERFACE_FLAG_DUPLEX_MASK |
 339      VNET_HW_INTERFACE_FLAG_SPEED_MASK);
 340   flags &= mask;
 341
 342   /* Call hardware interface add/del callbacks. */
 343   if (is_create)
 344     call_hw_interface_add_del_callbacks (vnm, hw_if_index, is_create);
 345
 346   /* Already in the desired state? */
 347   if (!is_create && (hi->flags & mask) == flags)
 348     goto done;
 349
 350   /* Some interface classes do not redistribute (e.g. are local). */
 351   if (!dev_class->redistribute)
 352     helper_flags &= ~VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE;
 353
 354   if (vm->mc_main
 355       && (helper_flags & VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE))
 356     {
 357       vnet_sw_hw_interface_state_t s;
 358       s.sw_hw_if_index = hw_if_index;
 359       s.flags = flags;
 360       mc_serialize (vm->mc_main, &vnet_hw_interface_set_flags_msg, &s);
 361     }
 362
 363   if ((hi->flags & VNET_HW_INTERFACE_FLAG_LINK_UP) !=
 364       (flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
 365     {
 366       /* Do hardware class (e.g. ethernet). */
 367       if (hw_class->link_up_down_function
 368           && (error = hw_class->link_up_down_function (vnm, hw_if_index,
 369                                                        flags)))
 370         goto done;
 371
 372       error = call_elf_section_interface_callbacks
 373         (vnm, hw_if_index, flags, vnm->hw_interface_link_up_down_functions);
 374
 375       if (error)
 376         goto done;
 377     }
 378
 379   hi->flags &= ~mask;
 380   hi->flags |= flags;
 381
 382 done:
 383   return error;
 384 }
 385
 386 static clib_error_t *
 387 vnet_sw_interface_set_flags_helper (vnet_main_t * vnm, u32 sw_if_index,
 388                                     u32 flags, u32 helper_flags)
 389 {
 390   vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
 391   vlib_main_t *vm = vnm->vlib_main;
 392   u32 mask;
 393   clib_error_t *error = 0;
 394   u32 is_create =
 395     (helper_flags & VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE) != 0;
 396   u32 old_flags;
 397
 398   mask = VNET_SW_INTERFACE_FLAG_ADMIN_UP | VNET_SW_INTERFACE_FLAG_PUNT;
 399   flags &= mask;
 400
 401   if (is_create)
 402     {
 403       error =
 404         call_sw_interface_add_del_callbacks (vnm, sw_if_index, is_create);
 405       if (error)
 406         goto done;
 407
 408       if (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
 409         {
 410           /* Notify everyone when the interface is created as admin up */
 411           error = call_elf_section_interface_callbacks (vnm, sw_if_index,
 412                                                         flags,
 413                                                         vnm->
 414                                                         sw_interface_admin_up_down_functions);
 415           if (error)
 416             goto done;
 417         }
 418     }
 419   else
 420     {
 421       vnet_sw_interface_t *si_sup = si;
 422
 423       /* Check that super interface is in correct state. */
 424       if (si->type == VNET_SW_INTERFACE_TYPE_SUB)
 425         {
 426           si_sup = vnet_get_sw_interface (vnm, si->sup_sw_if_index);
 427
 428           /* Check to see if we're bringing down the soft interface and if it's parent is up */
 429           if ((flags != (si_sup->flags & mask)) &&
 430               (!((flags == 0)
 431                  && ((si_sup->flags & mask) ==
 432                      VNET_SW_INTERFACE_FLAG_ADMIN_UP))))
 433             {
 434               error = clib_error_return (0, "super-interface %U must be %U",
 435                                          format_vnet_sw_interface_name, vnm,
 436                                          si_sup,
 437                                          format_vnet_sw_interface_flags,
 438                                          flags);
 439               goto done;
 440             }
 441         }
 442
 443       /* Donot change state for slave link of bonded interfaces */
 444       if (si->flags & VNET_SW_INTERFACE_FLAG_BOND_SLAVE)
 445         {
 446           error = clib_error_return
 447             (0, "not allowed as %U belong to a BondEthernet interface",
 448              format_vnet_sw_interface_name, vnm, si);
 449           goto done;
 450         }
 451
 452       /* Already in the desired state? */
 453       if ((si->flags & mask) == flags)
 454         goto done;
 455
 456       /* Sub-interfaces of hardware interfaces that do no redistribute,
 457          do not redistribute themselves. */
 458       if (si_sup->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
 459         {
 460           vnet_hw_interface_t *hi =
 461             vnet_get_hw_interface (vnm, si_sup->hw_if_index);
 462           vnet_device_class_t *dev_class =
 463             vnet_get_device_class (vnm, hi->dev_class_index);
 464           if (!dev_class->redistribute)
 465             helper_flags &=
 466               ~VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE;
 467         }
 468
 469       if (vm->mc_main
 470           && (helper_flags &
 471               VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE))
 472         {
 473           vnet_sw_hw_interface_state_t s;
 474           s.sw_hw_if_index = sw_if_index;
 475           s.flags = flags;
 476           mc_serialize (vm->mc_main, &vnet_sw_interface_set_flags_msg, &s);
 477         }
 478
 479       /* set the flags now before invoking the registered clients
 480        * so that the state they query is consistent with the state here notified */
 481       old_flags = si->flags;
 482       si->flags &= ~mask;
 483       si->flags |= flags;
 484       if ((flags | old_flags) & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
 485         error = call_elf_section_interface_callbacks
 486           (vnm, sw_if_index, flags,
 487            vnm->sw_interface_admin_up_down_functions);
 488
 489       if (error)
 490         {
 491           /* restore flags on error */
 492           si->flags = old_flags;
 493           goto done;
 494         }
 495
 496       if (si->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
 497         {
 498           vnet_hw_interface_t *hi =
 499             vnet_get_hw_interface (vnm, si->hw_if_index);
 500           vnet_hw_interface_class_t *hw_class =
 501             vnet_get_hw_interface_class (vnm, hi->hw_class_index);
 502           vnet_device_class_t *dev_class =
 503             vnet_get_device_class (vnm, hi->dev_class_index);
 504
 505           if ((flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) &&
 506               (si->flags & VNET_SW_INTERFACE_FLAG_ERROR))
 507             {
 508               error = clib_error_return (0, "Interface in the error state");
 509               goto done;
 510             }
 511
 512           /* save the si admin up flag */
 513           old_flags = si->flags;
 514
 515           /* update si admin up flag in advance if we are going admin down */
 516           if (!(flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
 517             si->flags &= ~VNET_SW_INTERFACE_FLAG_ADMIN_UP;
 518
 519           if (dev_class->admin_up_down_function
 520               && (error = dev_class->admin_up_down_function (vnm,
 521                                                              si->hw_if_index,
 522                                                              flags)))
 523             {
 524               /* restore si admin up flag to it's original state on errors */
 525               si->flags = old_flags;
 526               goto done;
 527             }
 528
 529           if (hw_class->admin_up_down_function
 530               && (error = hw_class->admin_up_down_function (vnm,
 531                                                             si->hw_if_index,
 532                                                             flags)))
 533             {
 534               /* restore si admin up flag to it's original state on errors */
 535               si->flags = old_flags;
 536               goto done;
 537             }
 538
 539           /* Admin down implies link down. */
 540           if (!(flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
 541               && (hi->flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
 542             vnet_hw_interface_set_flags_helper (vnm, si->hw_if_index,
 543                                                 hi->flags &
 544                                                 ~VNET_HW_INTERFACE_FLAG_LINK_UP,
 545                                                 helper_flags);
 546         }
 547     }
 548
 549   si->flags &= ~mask;
 550   si->flags |= flags;
 551
 552 done:
 553   return error;
 554 }
 555
 556 clib_error_t *
 557 vnet_hw_interface_set_flags (vnet_main_t * vnm, u32 hw_if_index, u32 flags)
 558 {
 559   return vnet_hw_interface_set_flags_helper
 560     (vnm, hw_if_index, flags,
 561      VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE);
 562 }
 563
 564 clib_error_t *
 565 vnet_sw_interface_set_flags (vnet_main_t * vnm, u32 sw_if_index, u32 flags)
 566 {
 567   return vnet_sw_interface_set_flags_helper
 568     (vnm, sw_if_index, flags,
 569      VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE);
 570 }
 571
 572 static u32
 573 vnet_create_sw_interface_no_callbacks (vnet_main_t * vnm,
 574                                        vnet_sw_interface_t * template)
 575 {
 576   vnet_interface_main_t *im = &vnm->interface_main;
 577   vnet_sw_interface_t *sw;
 578   u32 sw_if_index;
 579
 580   pool_get (im->sw_interfaces, sw);
 581   sw_if_index = sw - im->sw_interfaces;
 582
 583   sw[0] = template[0];
 584
 585   sw->flags = 0;
 586   sw->sw_if_index = sw_if_index;
 587   if (sw->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
 588     sw->sup_sw_if_index = sw->sw_if_index;
 589
 590   /* Allocate counters for this interface. */
 591   {
 592     u32 i;
 593
 594     vnet_interface_counter_lock (im);
 595
 596     for (i = 0; i < vec_len (im->sw_if_counters); i++)
 597       {
 598         vlib_validate_simple_counter (&im->sw_if_counters[i], sw_if_index);
 599         vlib_zero_simple_counter (&im->sw_if_counters[i], sw_if_index);
 600       }
 601
 602     for (i = 0; i < vec_len (im->combined_sw_if_counters); i++)
 603       {
 604         vlib_validate_combined_counter (&im->combined_sw_if_counters[i],
 605                                         sw_if_index);
 606         vlib_zero_combined_counter (&im->combined_sw_if_counters[i],
 607                                     sw_if_index);
 608       }
 609
 610     vnet_interface_counter_unlock (im);
 611   }
 612
 613   return sw_if_index;
 614 }
 615
 616 clib_error_t *
 617 vnet_create_sw_interface (vnet_main_t * vnm, vnet_sw_interface_t * template,
 618                           u32 * sw_if_index)
 619 {
 620   clib_error_t *error;
 621   vnet_hw_interface_t *hi;
 622   vnet_device_class_t *dev_class;
 623
 624   hi = vnet_get_sup_hw_interface (vnm, template->sup_sw_if_index);
 625   dev_class = vnet_get_device_class (vnm, hi->dev_class_index);
 626
 627   if (template->type == VNET_SW_INTERFACE_TYPE_SUB &&
 628       dev_class->subif_add_del_function)
 629     {
 630       error = dev_class->subif_add_del_function (vnm, hi->hw_if_index,
 631                                                  (struct vnet_sw_interface_t
 632                                                   *) template, 1);
 633       if (error)
 634         return error;
 635     }
 636
 637   *sw_if_index = vnet_create_sw_interface_no_callbacks (vnm, template);
 638   error = vnet_sw_interface_set_flags_helper
 639     (vnm, *sw_if_index, template->flags,
 640      VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE);
 641
 642   if (error)
 643     {
 644       /* undo the work done by vnet_create_sw_interface_no_callbacks() */
 645       vnet_interface_main_t *im = &vnm->interface_main;
 646       vnet_sw_interface_t *sw =
 647         pool_elt_at_index (im->sw_interfaces, *sw_if_index);
 648       pool_put (im->sw_interfaces, sw);
 649     }
 650
 651   return error;
 652 }
 653
 654 void
 655 vnet_delete_sw_interface (vnet_main_t * vnm, u32 sw_if_index)
 656 {
 657   vnet_interface_main_t *im = &vnm->interface_main;
 658   vnet_sw_interface_t *sw =
 659     pool_elt_at_index (im->sw_interfaces, sw_if_index);
 660
 661   /* Check if the interface has config and is removed from L2 BD or XConnect */
 662   vlib_main_t *vm = vlib_get_main ();
 663   l2_input_config_t *config;
 664   if (sw_if_index < vec_len (l2input_main.configs))
 665     {
 666       config = vec_elt_at_index (l2input_main.configs, sw_if_index);
 667       if (config->xconnect)
 668         set_int_l2_mode (vm, vnm, MODE_L3, config->output_sw_if_index, 0, 0,
 669                          0, 0);
 670       if (config->xconnect || config->bridge)
 671         set_int_l2_mode (vm, vnm, MODE_L3, sw_if_index, 0, 0, 0, 0);
 672     }
 673   vnet_clear_sw_interface_tag (vnm, sw_if_index);
 674
 675   /* Bring down interface in case it is up. */
 676   if (sw->flags != 0)
 677     vnet_sw_interface_set_flags (vnm, sw_if_index, /* flags */ 0);
 678
 679   call_sw_interface_add_del_callbacks (vnm, sw_if_index, /* is_create */ 0);
 680
 681   pool_put (im->sw_interfaces, sw);
 682 }
 683
 684 static void
 685 setup_tx_node (vlib_main_t * vm,
 686                u32 node_index, vnet_device_class_t * dev_class)
 687 {
 688   vlib_node_t *n = vlib_get_node (vm, node_index);
 689
 690   n->function = dev_class->tx_function;
 691   n->format_trace = dev_class->format_tx_trace;
 692
 693   vlib_register_errors (vm, node_index,
 694                         dev_class->tx_function_n_errors,
 695                         dev_class->tx_function_error_strings);
 696 }
 697
 698 static void
 699 setup_output_node (vlib_main_t * vm,
 700                    u32 node_index, vnet_hw_interface_class_t * hw_class)
 701 {
 702   vlib_node_t *n = vlib_get_node (vm, node_index);
 703   n->format_buffer = hw_class->format_header;
 704   n->unformat_buffer = hw_class->unformat_header;
 705 }
 706
 707 /* Register an interface instance. */
 708 u32
 709 vnet_register_interface (vnet_main_t * vnm,
 710                          u32 dev_class_index,
 711                          u32 dev_instance,
 712                          u32 hw_class_index, u32 hw_instance)
 713 {
 714   vnet_interface_main_t *im = &vnm->interface_main;
 715   vnet_hw_interface_t *hw;
 716   vnet_device_class_t *dev_class =
 717     vnet_get_device_class (vnm, dev_class_index);
 718   vnet_hw_interface_class_t *hw_class =
 719     vnet_get_hw_interface_class (vnm, hw_class_index);
 720   vlib_main_t *vm = vnm->vlib_main;
 721   vnet_feature_config_main_t *fcm;
 722   vnet_config_main_t *cm;
 723   u32 hw_index, i;
 724   char *tx_node_name = NULL, *output_node_name = NULL;
 725
 726   pool_get (im->hw_interfaces, hw);
 727   memset (hw, 0, sizeof (*hw));
 728
 729   hw_index = hw - im->hw_interfaces;
 730   hw->hw_if_index = hw_index;
 731   hw->default_rx_mode = VNET_HW_INTERFACE_RX_MODE_POLLING;
 732
 733   if (dev_class->format_device_name)
 734     hw->name = format (0, "%U", dev_class->format_device_name, dev_instance);
 735   else if (hw_class->format_interface_name)
 736     hw->name = format (0, "%U", hw_class->format_interface_name,
 737                        dev_instance);
 738   else
 739     hw->name = format (0, "%s%x", hw_class->name, dev_instance);
 740
 741   if (!im->hw_interface_by_name)
 742     im->hw_interface_by_name = hash_create_vec ( /* size */ 0,
 743                                                 sizeof (hw->name[0]),
 744                                                 sizeof (uword));
 745
 746   hash_set_mem (im->hw_interface_by_name, hw->name, hw_index);
 747
 748   /* Make hardware interface point to software interface. */
 749   {
 750     vnet_sw_interface_t sw = {
 751       .type = VNET_SW_INTERFACE_TYPE_HARDWARE,
 752       .flood_class = VNET_FLOOD_CLASS_NORMAL,
 753       .hw_if_index = hw_index
 754     };
 755     hw->sw_if_index = vnet_create_sw_interface_no_callbacks (vnm, &sw);
 756   }
 757
 758   hw->dev_class_index = dev_class_index;
 759   hw->dev_instance = dev_instance;
 760   hw->hw_class_index = hw_class_index;
 761   hw->hw_instance = hw_instance;
 762
 763   hw->max_rate_bits_per_sec = 0;
 764   hw->min_packet_bytes = 0;
 765   hw->per_packet_overhead_bytes = 0;
 766   hw->max_l3_packet_bytes[VLIB_RX] = ~0;
 767   hw->max_l3_packet_bytes[VLIB_TX] = ~0;
 768
 769   if (dev_class->tx_function == 0)
 770     goto no_output_nodes;       /* No output/tx nodes to create */
 771
 772   tx_node_name = (char *) format (0, "%v-tx", hw->name);
 773   output_node_name = (char *) format (0, "%v-output", hw->name);
 774
 775   /* If we have previously deleted interface nodes, re-use them. */
 776   if (vec_len (im->deleted_hw_interface_nodes) > 0)
 777     {
 778       vnet_hw_interface_nodes_t *hn;
 779       vlib_node_t *node;
 780       vlib_node_runtime_t *nrt;
 781
 782       hn = vec_end (im->deleted_hw_interface_nodes) - 1;
 783
 784       hw->tx_node_index = hn->tx_node_index;
 785       hw->output_node_index = hn->output_node_index;
 786
 787       vlib_node_rename (vm, hw->tx_node_index, "%v", tx_node_name);
 788       vlib_node_rename (vm, hw->output_node_index, "%v", output_node_name);
 789
 790       /* *INDENT-OFF* */
 791       foreach_vlib_main ({
 792         vnet_interface_output_runtime_t *rt;
 793
 794         rt = vlib_node_get_runtime_data (this_vlib_main, hw->output_node_index);
 795         ASSERT (rt->is_deleted == 1);
 796         rt->is_deleted = 0;
 797         rt->hw_if_index = hw_index;
 798         rt->sw_if_index = hw->sw_if_index;
 799         rt->dev_instance = hw->dev_instance;
 800
 801         rt = vlib_node_get_runtime_data (this_vlib_main, hw->tx_node_index);
 802         rt->hw_if_index = hw_index;
 803         rt->sw_if_index = hw->sw_if_index;
 804         rt->dev_instance = hw->dev_instance;
 805       });
 806       /* *INDENT-ON* */
 807
 808       /* The new class may differ from the old one.
 809        * Functions have to be updated. */
 810       node = vlib_get_node (vm, hw->output_node_index);
 811       node->function = vnet_interface_output_node_multiarch_select ();
 812       node->format_trace = format_vnet_interface_output_trace;
 813       /* *INDENT-OFF* */
 814       foreach_vlib_main ({
 815         nrt = vlib_node_get_runtime (this_vlib_main, hw->output_node_index);
 816         nrt->function = node->function;
 817       });
 818       /* *INDENT-ON* */
 819
 820       node = vlib_get_node (vm, hw->tx_node_index);
 821       node->function = dev_class->tx_function;
 822       node->format_trace = dev_class->format_tx_trace;
 823       /* *INDENT-OFF* */
 824       foreach_vlib_main ({
 825         nrt = vlib_node_get_runtime (this_vlib_main, hw->tx_node_index);
 826         nrt->function = node->function;
 827       });
 828       /* *INDENT-ON* */
 829
 830       _vec_len (im->deleted_hw_interface_nodes) -= 1;
 831     }
 832   else
 833     {
 834       vlib_node_registration_t r;
 835       vnet_interface_output_runtime_t rt = {
 836         .hw_if_index = hw_index,
 837         .sw_if_index = hw->sw_if_index,
 838         .dev_instance = hw->dev_instance,
 839         .is_deleted = 0,
 840       };
 841
 842       memset (&r, 0, sizeof (r));
 843       r.type = VLIB_NODE_TYPE_INTERNAL;
 844       r.runtime_data = &rt;
 845       r.runtime_data_bytes = sizeof (rt);
 846       r.scalar_size = 0;
 847       r.vector_size = sizeof (u32);
 848
 849       r.flags = VLIB_NODE_FLAG_IS_OUTPUT;
 850       r.name = tx_node_name;
 851       r.function = dev_class->tx_function;
 852
 853       hw->tx_node_index = vlib_register_node (vm, &r);
 854
 855       vlib_node_add_named_next_with_slot (vm, hw->tx_node_index,
 856                                           "error-drop",
 857                                           VNET_INTERFACE_TX_NEXT_DROP);
 858
 859       r.flags = 0;
 860       r.name = output_node_name;
 861       r.function = vnet_interface_output_node_multiarch_select ();
 862       r.format_trace = format_vnet_interface_output_trace;
 863
 864       {
 865         static char *e[] = {
 866           "interface is down",
 867           "interface is deleted",
 868         };
 869
 870         r.n_errors = ARRAY_LEN (e);
 871         r.error_strings = e;
 872       }
 873       hw->output_node_index = vlib_register_node (vm, &r);
 874
 875       vlib_node_add_named_next_with_slot (vm, hw->output_node_index,
 876                                           "error-drop",
 877                                           VNET_INTERFACE_OUTPUT_NEXT_DROP);
 878       vlib_node_add_next_with_slot (vm, hw->output_node_index,
 879                                     hw->tx_node_index,
 880                                     VNET_INTERFACE_OUTPUT_NEXT_TX);
 881
 882       /* add interface to the list of "output-interface" feature arc start nodes
 883          and clone nexts from 1st interface if it exists */
 884       fcm = vnet_feature_get_config_main (im->output_feature_arc_index);
 885       cm = &fcm->config_main;
 886       i = vec_len (cm->start_node_indices);
 887       vec_validate (cm->start_node_indices, i);
 888       cm->start_node_indices[i] = hw->output_node_index;
 889       if (hw_index)
 890         {
 891           /* copy nexts from 1st interface */
 892           vnet_hw_interface_t *first_hw;
 893           vlib_node_t *first_node;
 894
 895           first_hw = vnet_get_hw_interface (vnm, /* hw_if_index */ 0);
 896           first_node = vlib_get_node (vm, first_hw->output_node_index);
 897
 898           /* 1st 2 nexts are already added above */
 899           for (i = 2; i < vec_len (first_node->next_nodes); i++)
 900             vlib_node_add_next_with_slot (vm, hw->output_node_index,
 901                                           first_node->next_nodes[i], i);
 902         }
 903     }
 904
 905   setup_output_node (vm, hw->output_node_index, hw_class);
 906   setup_tx_node (vm, hw->tx_node_index, dev_class);
 907
 908 no_output_nodes:
 909   /* Call all up/down callbacks with zero flags when interface is created. */
 910   vnet_sw_interface_set_flags_helper (vnm, hw->sw_if_index, /* flags */ 0,
 911                                       VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE);
 912   vnet_hw_interface_set_flags_helper (vnm, hw_index, /* flags */ 0,
 913                                       VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE);
 914   vec_free (tx_node_name);
 915   vec_free (output_node_name);
 916
 917   return hw_index;
 918 }
 919
 920 void
 921 vnet_delete_hw_interface (vnet_main_t * vnm, u32 hw_if_index)
 922 {
 923   vnet_interface_main_t *im = &vnm->interface_main;
 924   vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
 925   vlib_main_t *vm = vnm->vlib_main;
 926   vnet_device_class_t *dev_class = vnet_get_device_class (vnm,
 927                                                           hw->dev_class_index);
 928   /* If it is up, mark it down. */
 929   if (hw->flags != 0)
 930     vnet_hw_interface_set_flags (vnm, hw_if_index, /* flags */ 0);
 931
 932   /* Call delete callbacks. */
 933   call_hw_interface_add_del_callbacks (vnm, hw_if_index, /* is_create */ 0);
 934
 935   /* Delete any sub-interfaces. */
 936   {
 937     u32 id, sw_if_index;
 938     /* *INDENT-OFF* */
 939     hash_foreach (id, sw_if_index, hw->sub_interface_sw_if_index_by_id,
 940     ({
 941       vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
 942       u64 sup_and_sub_key =
 943         ((u64) (si->sup_sw_if_index) << 32) | (u64) si->sub.id;
 944       hash_unset_mem_free (&im->sw_if_index_by_sup_and_sub, &sup_and_sub_key);
 945       vnet_delete_sw_interface (vnm, sw_if_index);
 946     }));
 947     hash_free (hw->sub_interface_sw_if_index_by_id);
 948     /* *INDENT-ON* */
 949   }
 950
 951   /* Delete software interface corresponding to hardware interface. */
 952   vnet_delete_sw_interface (vnm, hw->sw_if_index);
 953
 954   if (dev_class->tx_function)
 955     {
 956       /* Put output/tx nodes into recycle pool */
 957       vnet_hw_interface_nodes_t *dn;
 958
 959       /* *INDENT-OFF* */
 960       foreach_vlib_main
 961         ({
 962           vnet_interface_output_runtime_t *rt =
 963             vlib_node_get_runtime_data (this_vlib_main, hw->output_node_index);
 964
 965           /* Mark node runtime as deleted so output node (if called)
 966            * will drop packets. */
 967           rt->is_deleted = 1;
 968         });
 969       /* *INDENT-ON* */
 970
 971       vlib_node_rename (vm, hw->output_node_index,
 972                         "interface-%d-output-deleted", hw_if_index);
 973       vlib_node_rename (vm, hw->tx_node_index, "interface-%d-tx-deleted",
 974                         hw_if_index);
 975       vec_add2 (im->deleted_hw_interface_nodes, dn, 1);
 976       dn->tx_node_index = hw->tx_node_index;
 977       dn->output_node_index = hw->output_node_index;
 978     }
 979
 980   hash_unset_mem (im->hw_interface_by_name, hw->name);
 981   vec_free (hw->name);
 982   vec_free (hw->hw_address);
 983   vec_free (hw->input_node_thread_index_by_queue);
 984   vec_free (hw->dq_runtime_index_by_queue);
 985
 986   pool_put (im->hw_interfaces, hw);
 987 }
 988
 989 void
 990 vnet_hw_interface_walk_sw (vnet_main_t * vnm,
 991                            u32 hw_if_index,
 992                            vnet_hw_sw_interface_walk_t fn, void *ctx)
 993 {
 994   vnet_hw_interface_t *hi;
 995   u32 id, sw_if_index;
 996
 997   hi = vnet_get_hw_interface (vnm, hw_if_index);
 998   /* the super first, then the and sub interfaces */
 999   fn (vnm, hi->sw_if_index, ctx);
1000
1001   /* *INDENT-OFF* */
1002   hash_foreach (id, sw_if_index,
1003                 hi->sub_interface_sw_if_index_by_id,
1004   ({
1005     if (WALK_STOP == fn (vnm, sw_if_index, ctx))
1006       break;
1007   }));
1008   /* *INDENT-ON* */
1009 }
1010
1011 void
1012 vnet_sw_interface_walk (vnet_main_t * vnm,
1013                         vnet_sw_interface_walk_t fn, void *ctx)
1014 {
1015   vnet_interface_main_t *im;
1016   vnet_sw_interface_t *si;
1017
1018   im = &vnm->interface_main;
1019
1020   /* *INDENT-OFF* */
1021   pool_foreach (si, im->sw_interfaces,
1022   {
1023     if (WALK_STOP == fn (vnm, si, ctx))
1024       break;
1025   });
1026   /* *INDENT-ON* */
1027 }
1028
1029 static void
1030 serialize_vnet_hw_interface_set_class (serialize_main_t * m, va_list * va)
1031 {
1032   u32 hw_if_index = va_arg (*va, u32);
1033   char *hw_class_name = va_arg (*va, char *);
1034   serialize_integer (m, hw_if_index, sizeof (hw_if_index));
1035   serialize_cstring (m, hw_class_name);
1036 }
1037
1038 static void
1039 unserialize_vnet_hw_interface_set_class (serialize_main_t * m, va_list * va)
1040 {
1041   CLIB_UNUSED (mc_main_t * mc) = va_arg (*va, mc_main_t *);
1042   vnet_main_t *vnm = vnet_get_main ();
1043   u32 hw_if_index;
1044   char *hw_class_name;
1045   uword *p;
1046   clib_error_t *error;
1047
1048   unserialize_integer (m, &hw_if_index, sizeof (hw_if_index));
1049   unserialize_cstring (m, &hw_class_name);
1050   p =
1051     hash_get (vnm->interface_main.hw_interface_class_by_name, hw_class_name);
1052   ASSERT (p != 0);
1053   error = vnet_hw_interface_set_class_helper (vnm, hw_if_index, p[0],
1054                                               /* redistribute */ 0);
1055   if (error)
1056     clib_error_report (error);
1057 }
1058
1059 MC_SERIALIZE_MSG (vnet_hw_interface_set_class_msg, static) =
1060 {
1061 .name = "vnet_hw_interface_set_class",.serialize =
1062     serialize_vnet_hw_interface_set_class,.unserialize =
1063     unserialize_vnet_hw_interface_set_class,};
1064
1065 void
1066 vnet_hw_interface_init_for_class (vnet_main_t * vnm, u32 hw_if_index,
1067                                   u32 hw_class_index, u32 hw_instance)
1068 {
1069   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1070   vnet_hw_interface_class_t *hc =
1071     vnet_get_hw_interface_class (vnm, hw_class_index);
1072
1073   hi->hw_class_index = hw_class_index;
1074   hi->hw_instance = hw_instance;
1075   setup_output_node (vnm->vlib_main, hi->output_node_index, hc);
1076 }
1077
1078 static clib_error_t *
1079 vnet_hw_interface_set_class_helper (vnet_main_t * vnm, u32 hw_if_index,
1080                                     u32 hw_class_index, u32 redistribute)
1081 {
1082   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1083   vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, hi->sw_if_index);
1084   vnet_hw_interface_class_t *old_class =
1085     vnet_get_hw_interface_class (vnm, hi->hw_class_index);
1086   vnet_hw_interface_class_t *new_class =
1087     vnet_get_hw_interface_class (vnm, hw_class_index);
1088   vnet_device_class_t *dev_class =
1089     vnet_get_device_class (vnm, hi->dev_class_index);
1090   clib_error_t *error = 0;
1091
1092   /* New class equals old class?  Nothing to do. */
1093   if (hi->hw_class_index == hw_class_index)
1094     return 0;
1095
1096   /* No need (and incorrect since admin up flag may be set) to do error checking when
1097      receiving unserialize message. */
1098   if (redistribute)
1099     {
1100       if (si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
1101         return clib_error_return (0,
1102                                   "%v must be admin down to change class from %s to %s",
1103                                   hi->name, old_class->name, new_class->name);
1104
1105       /* Make sure interface supports given class. */
1106       if ((new_class->is_valid_class_for_interface
1107            && !new_class->is_valid_class_for_interface (vnm, hw_if_index,
1108                                                         hw_class_index))
1109           || (dev_class->is_valid_class_for_interface
1110               && !dev_class->is_valid_class_for_interface (vnm, hw_if_index,
1111                                                            hw_class_index)))
1112         return clib_error_return (0,
1113                                   "%v class cannot be changed from %s to %s",
1114                                   hi->name, old_class->name, new_class->name);
1115
1116       if (vnm->vlib_main->mc_main)
1117         {
1118           mc_serialize (vnm->vlib_main->mc_main,
1119                         &vnet_hw_interface_set_class_msg, hw_if_index,
1120                         new_class->name);
1121           return 0;
1122         }
1123     }
1124
1125   if (old_class->hw_class_change)
1126     old_class->hw_class_change (vnm, hw_if_index, old_class->index,
1127                                 new_class->index);
1128
1129   vnet_hw_interface_init_for_class (vnm, hw_if_index, new_class->index,
1130                                     /* instance */ ~0);
1131
1132   if (new_class->hw_class_change)
1133     new_class->hw_class_change (vnm, hw_if_index, old_class->index,
1134                                 new_class->index);
1135
1136   if (dev_class->hw_class_change)
1137     dev_class->hw_class_change (vnm, hw_if_index, new_class->index);
1138
1139   return error;
1140 }
1141
1142 clib_error_t *
1143 vnet_hw_interface_set_class (vnet_main_t * vnm, u32 hw_if_index,
1144                              u32 hw_class_index)
1145 {
1146   return vnet_hw_interface_set_class_helper (vnm, hw_if_index, hw_class_index,
1147                                              /* redistribute */ 1);
1148 }
1149
1150 static int
1151 vnet_hw_interface_rx_redirect_to_node_helper (vnet_main_t * vnm,
1152                                               u32 hw_if_index,
1153                                               u32 node_index,
1154                                               u32 redistribute)
1155 {
1156   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1157   vnet_device_class_t *dev_class = vnet_get_device_class
1158     (vnm, hi->dev_class_index);
1159
1160   if (redistribute)
1161     {
1162       /* $$$$ fixme someday maybe */
1163       ASSERT (vnm->vlib_main->mc_main == 0);
1164     }
1165   if (dev_class->rx_redirect_to_node)
1166     {
1167       dev_class->rx_redirect_to_node (vnm, hw_if_index, node_index);
1168       return 0;
1169     }
1170
1171   return VNET_API_ERROR_UNIMPLEMENTED;
1172 }
1173
1174 int
1175 vnet_hw_interface_rx_redirect_to_node (vnet_main_t * vnm, u32 hw_if_index,
1176                                        u32 node_index)
1177 {
1178   return vnet_hw_interface_rx_redirect_to_node_helper (vnm, hw_if_index,
1179                                                        node_index,
1180                                                        1 /* redistribute */ );
1181 }
1182
1183 word
1184 vnet_sw_interface_compare (vnet_main_t * vnm,
1185                            uword sw_if_index0, uword sw_if_index1)
1186 {
1187   vnet_sw_interface_t *sup0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1188   vnet_sw_interface_t *sup1 = vnet_get_sup_sw_interface (vnm, sw_if_index1);
1189   vnet_hw_interface_t *h0 = vnet_get_hw_interface (vnm, sup0->hw_if_index);
1190   vnet_hw_interface_t *h1 = vnet_get_hw_interface (vnm, sup1->hw_if_index);
1191
1192   if (h0 != h1)
1193     return vec_cmp (h0->name, h1->name);
1194   return (word) h0->hw_instance - (word) h1->hw_instance;
1195 }
1196
1197 word
1198 vnet_hw_interface_compare (vnet_main_t * vnm,
1199                            uword hw_if_index0, uword hw_if_index1)
1200 {
1201   vnet_hw_interface_t *h0 = vnet_get_hw_interface (vnm, hw_if_index0);
1202   vnet_hw_interface_t *h1 = vnet_get_hw_interface (vnm, hw_if_index1);
1203
1204   if (h0 != h1)
1205     return vec_cmp (h0->name, h1->name);
1206   return (word) h0->hw_instance - (word) h1->hw_instance;
1207 }
1208
1209 int
1210 vnet_sw_interface_is_p2p (vnet_main_t * vnm, u32 sw_if_index)
1211 {
1212   vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
1213   if (si->type == VNET_SW_INTERFACE_TYPE_P2P)
1214     return 1;
1215
1216   vnet_hw_interface_t *hw = vnet_get_sup_hw_interface (vnm, sw_if_index);
1217   vnet_hw_interface_class_t *hc =
1218     vnet_get_hw_interface_class (vnm, hw->hw_class_index);
1219
1220   return (hc->flags & VNET_HW_INTERFACE_CLASS_FLAG_P2P);
1221 }
1222
1223 clib_error_t *
1224 vnet_interface_init (vlib_main_t * vm)
1225 {
1226   vnet_main_t *vnm = vnet_get_main ();
1227   vnet_interface_main_t *im = &vnm->interface_main;
1228   vlib_buffer_t *b = 0;
1229   vnet_buffer_opaque_t *o = 0;
1230   clib_error_t *error;
1231
1232   /*
1233    * Keep people from shooting themselves in the foot.
1234    */
1235   if (sizeof (b->opaque) != sizeof (vnet_buffer_opaque_t))
1236     {
1237 #define _(a) if (sizeof(o->a) > sizeof (o->unused))                     \
1238       clib_warning                                                      \
1239         ("FATAL: size of opaque union subtype %s is %d (max %d)",       \
1240          #a, sizeof(o->a), sizeof (o->unused));
1241       foreach_buffer_opaque_union_subtype;
1242 #undef _
1243
1244       return clib_error_return
1245         (0, "FATAL: size of vlib buffer opaque %d, size of vnet opaque %d",
1246          sizeof (b->opaque), sizeof (vnet_buffer_opaque_t));
1247     }
1248
1249   im->sw_if_counter_lock = clib_mem_alloc_aligned (CLIB_CACHE_LINE_BYTES,
1250                                                    CLIB_CACHE_LINE_BYTES);
1251   im->sw_if_counter_lock[0] = 1;        /* should be no need */
1252
1253   vec_validate (im->sw_if_counters, VNET_N_SIMPLE_INTERFACE_COUNTER - 1);
1254   im->sw_if_counters[VNET_INTERFACE_COUNTER_DROP].name = "drops";
1255   im->sw_if_counters[VNET_INTERFACE_COUNTER_PUNT].name = "punts";
1256   im->sw_if_counters[VNET_INTERFACE_COUNTER_IP4].name = "ip4";
1257   im->sw_if_counters[VNET_INTERFACE_COUNTER_IP6].name = "ip6";
1258   im->sw_if_counters[VNET_INTERFACE_COUNTER_RX_NO_BUF].name = "rx-no-buf";
1259   im->sw_if_counters[VNET_INTERFACE_COUNTER_RX_MISS].name = "rx-miss";
1260   im->sw_if_counters[VNET_INTERFACE_COUNTER_RX_ERROR].name = "rx-error";
1261   im->sw_if_counters[VNET_INTERFACE_COUNTER_TX_ERROR].name = "tx-error";
1262
1263   vec_validate (im->combined_sw_if_counters,
1264                 VNET_N_COMBINED_INTERFACE_COUNTER - 1);
1265   im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_RX].name = "rx";
1266   im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_RX_UNICAST].name =
1267     "rx-unicast";
1268   im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_RX_MULTICAST].name =
1269     "rx-multicast";
1270   im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_RX_BROADCAST].name =
1271     "rx-broadcast";
1272   im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_TX].name = "tx";
1273   im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_TX_UNICAST].name =
1274     "tx-unicast";
1275   im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_TX_MULTICAST].name =
1276     "tx-multicast";
1277   im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_TX_BROADCAST].name =
1278     "tx-broadcast";
1279
1280   im->sw_if_counter_lock[0] = 0;
1281
1282   im->device_class_by_name = hash_create_string ( /* size */ 0,
1283                                                  sizeof (uword));
1284   {
1285     vnet_device_class_t *c;
1286
1287     c = vnm->device_class_registrations;
1288
1289     while (c)
1290       {
1291         c->index = vec_len (im->device_classes);
1292         hash_set_mem (im->device_class_by_name, c->name, c->index);
1293         vec_add1 (im->device_classes, c[0]);
1294         c = c->next_class_registration;
1295       }
1296   }
1297
1298   im->hw_interface_class_by_name = hash_create_string ( /* size */ 0,
1299                                                        sizeof (uword));
1300
1301   im->sw_if_index_by_sup_and_sub = hash_create_mem (0, sizeof (u64),
1302                                                     sizeof (uword));
1303   {
1304     vnet_hw_interface_class_t *c;
1305
1306     c = vnm->hw_interface_class_registrations;
1307
1308     while (c)
1309       {
1310         c->index = vec_len (im->hw_interface_classes);
1311         hash_set_mem (im->hw_interface_class_by_name, c->name, c->index);
1312
1313         if (NULL == c->build_rewrite)
1314           c->build_rewrite = default_build_rewrite;
1315         if (NULL == c->update_adjacency)
1316           c->update_adjacency = default_update_adjacency;
1317
1318         vec_add1 (im->hw_interface_classes, c[0]);
1319         c = c->next_class_registration;
1320       }
1321   }
1322
1323   if ((error = vlib_call_init_function (vm, vnet_interface_cli_init)))
1324     return error;
1325
1326   vnm->interface_tag_by_sw_if_index = hash_create (0, sizeof (uword));
1327
1328 #if VLIB_BUFFER_TRACE_TRAJECTORY > 0
1329   if ((error = vlib_call_init_function (vm, trajectory_trace_init)))
1330     return error;
1331 #endif
1332
1333   return 0;
1334 }
1335
1336 VLIB_INIT_FUNCTION (vnet_interface_init);
1337
1338 /* Kludge to renumber interface names [only!] */
1339 int
1340 vnet_interface_name_renumber (u32 sw_if_index, u32 new_show_dev_instance)
1341 {
1342   int rv;
1343   vnet_main_t *vnm = vnet_get_main ();
1344   vnet_interface_main_t *im = &vnm->interface_main;
1345   vnet_hw_interface_t *hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
1346
1347   vnet_device_class_t *dev_class = vnet_get_device_class
1348     (vnm, hi->dev_class_index);
1349
1350   if (dev_class->name_renumber == 0 || dev_class->format_device_name == 0)
1351     return VNET_API_ERROR_UNIMPLEMENTED;
1352
1353   rv = dev_class->name_renumber (hi, new_show_dev_instance);
1354
1355   if (rv)
1356     return rv;
1357
1358   hash_unset_mem (im->hw_interface_by_name, hi->name);
1359   vec_free (hi->name);
1360   /* Use the mapping we set up to call it Ishmael */
1361   hi->name = format (0, "%U", dev_class->format_device_name,
1362                      hi->dev_instance);
1363
1364   hash_set_mem (im->hw_interface_by_name, hi->name, hi->hw_if_index);
1365   return rv;
1366 }
1367
1368 clib_error_t *
1369 vnet_rename_interface (vnet_main_t * vnm, u32 hw_if_index, char *new_name)
1370 {
1371   vnet_interface_main_t *im = &vnm->interface_main;
1372   vlib_main_t *vm = vnm->vlib_main;
1373   vnet_hw_interface_t *hw;
1374   u8 *old_name;
1375   clib_error_t *error = 0;
1376
1377   hw = vnet_get_hw_interface (vnm, hw_if_index);
1378   if (!hw)
1379     {
1380       return clib_error_return (0,
1381                                 "unable to find hw interface for index %u",
1382                                 hw_if_index);
1383     }
1384
1385   old_name = hw->name;
1386
1387   /* set new hw->name */
1388   hw->name = format (0, "%s", new_name);
1389
1390   /* remove the old name to hw_if_index mapping and install the new one */
1391   hash_unset_mem (im->hw_interface_by_name, old_name);
1392   hash_set_mem (im->hw_interface_by_name, hw->name, hw_if_index);
1393
1394   /* rename tx/output nodes */
1395   vlib_node_rename (vm, hw->tx_node_index, "%v-tx", hw->name);
1396   vlib_node_rename (vm, hw->output_node_index, "%v-output", hw->name);
1397
1398   /* free the old name vector */
1399   vec_free (old_name);
1400
1401   return error;
1402 }
1403
1404 static clib_error_t *
1405 vnet_hw_interface_change_mac_address_helper (vnet_main_t * vnm,
1406                                              u32 hw_if_index,
1407                                              u8 * mac_address)
1408 {
1409   clib_error_t *error = 0;
1410   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1411
1412   if (hi->hw_address)
1413     {
1414       vnet_device_class_t *dev_class =
1415         vnet_get_device_class (vnm, hi->dev_class_index);
1416       if (dev_class->mac_addr_change_function)
1417         {
1418           error =
1419             dev_class->mac_addr_change_function (hi, (char *) mac_address);
1420         }
1421       if (!error)
1422         {
1423           vnet_hw_interface_class_t *hw_class;
1424
1425           hw_class = vnet_get_hw_interface_class (vnm, hi->hw_class_index);
1426
1427           if (NULL != hw_class->mac_addr_change_function)
1428             hw_class->mac_addr_change_function (hi, (char *) mac_address);
1429         }
1430       else
1431         {
1432           error =
1433             clib_error_return (0,
1434                                "MAC Address Change is not supported on this interface");
1435         }
1436     }
1437   else
1438     {
1439       error =
1440         clib_error_return (0,
1441                            "mac address change is not supported for interface index %u",
1442                            hw_if_index);
1443     }
1444   return error;
1445 }
1446
1447 clib_error_t *
1448 vnet_hw_interface_change_mac_address (vnet_main_t * vnm, u32 hw_if_index,
1449                                       u8 * mac_address)
1450 {
1451   return vnet_hw_interface_change_mac_address_helper
1452     (vnm, hw_if_index, mac_address);
1453 }
1454
1455 /* update the unnumbered state of an interface*/
1456 void
1457 vnet_sw_interface_update_unnumbered (u32 unnumbered_sw_if_index,
1458                                      u32 ip_sw_if_index, u8 enable)
1459 {
1460   vnet_main_t *vnm = vnet_get_main ();
1461   vnet_sw_interface_t *si;
1462   u32 was_unnum;
1463
1464   si = vnet_get_sw_interface (vnm, unnumbered_sw_if_index);
1465   was_unnum = (si->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED);
1466
1467   if (enable)
1468     {
1469       si->flags |= VNET_SW_INTERFACE_FLAG_UNNUMBERED;
1470       si->unnumbered_sw_if_index = ip_sw_if_index;
1471
1472       ip4_main.lookup_main.if_address_pool_index_by_sw_if_index
1473         [unnumbered_sw_if_index] =
1474         ip4_main.
1475         lookup_main.if_address_pool_index_by_sw_if_index[ip_sw_if_index];
1476       ip6_main.
1477         lookup_main.if_address_pool_index_by_sw_if_index
1478         [unnumbered_sw_if_index] =
1479         ip6_main.
1480         lookup_main.if_address_pool_index_by_sw_if_index[ip_sw_if_index];
1481     }
1482   else
1483     {
1484       si->flags &= ~(VNET_SW_INTERFACE_FLAG_UNNUMBERED);
1485       si->unnumbered_sw_if_index = (u32) ~ 0;
1486
1487       ip4_main.lookup_main.if_address_pool_index_by_sw_if_index
1488         [unnumbered_sw_if_index] = ~0;
1489       ip6_main.lookup_main.if_address_pool_index_by_sw_if_index
1490         [unnumbered_sw_if_index] = ~0;
1491     }
1492
1493   if (was_unnum != (si->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED))
1494     {
1495       ip4_sw_interface_enable_disable (unnumbered_sw_if_index, enable);
1496       ip6_sw_interface_enable_disable (unnumbered_sw_if_index, enable);
1497     }
1498 }
1499
1500 vnet_l3_packet_type_t
1501 vnet_link_to_l3_proto (vnet_link_t link)
1502 {
1503   switch (link)
1504     {
1505     case VNET_LINK_IP4:
1506       return (VNET_L3_PACKET_TYPE_IP4);
1507     case VNET_LINK_IP6:
1508       return (VNET_L3_PACKET_TYPE_IP6);
1509     case VNET_LINK_MPLS:
1510       return (VNET_L3_PACKET_TYPE_MPLS);
1511     case VNET_LINK_ARP:
1512       return (VNET_L3_PACKET_TYPE_ARP);
1513     case VNET_LINK_ETHERNET:
1514     case VNET_LINK_NSH:
1515       ASSERT (0);
1516       break;
1517     }
1518   ASSERT (0);
1519   return (0);
1520 }
1521
1522 u8 *
1523 default_build_rewrite (vnet_main_t * vnm,
1524                        u32 sw_if_index,
1525                        vnet_link_t link_type, const void *dst_address)
1526 {
1527   return (NULL);
1528 }
1529
1530 void
1531 default_update_adjacency (vnet_main_t * vnm, u32 sw_if_index, u32 ai)
1532 {
1533   ip_adjacency_t *adj;
1534
1535   adj = adj_get (ai);
1536
1537   switch (adj->lookup_next_index)
1538     {
1539     case IP_LOOKUP_NEXT_GLEAN:
1540       adj_glean_update_rewrite (ai);
1541       break;
1542     case IP_LOOKUP_NEXT_ARP:
1543       /*
1544        * default rewirte in neighbour adj
1545        */
1546       adj_nbr_update_rewrite
1547         (ai,
1548          ADJ_NBR_REWRITE_FLAG_COMPLETE,
1549          vnet_build_rewrite_for_sw_interface (vnm,
1550                                               sw_if_index,
1551                                               adj_get_link_type (ai), NULL));
1552       break;
1553     case IP_LOOKUP_NEXT_MCAST:
1554       /*
1555        * mcast traffic also uses default rewrite string with no mcast
1556        * switch time updates.
1557        */
1558       adj_mcast_update_rewrite
1559         (ai,
1560          vnet_build_rewrite_for_sw_interface (vnm,
1561                                               sw_if_index,
1562                                               adj_get_link_type (ai),
1563                                               NULL), 0);
1564       break;
1565     case IP_LOOKUP_NEXT_DROP:
1566     case IP_LOOKUP_NEXT_PUNT:
1567     case IP_LOOKUP_NEXT_LOCAL:
1568     case IP_LOOKUP_NEXT_REWRITE:
1569     case IP_LOOKUP_NEXT_MCAST_MIDCHAIN:
1570     case IP_LOOKUP_NEXT_MIDCHAIN:
1571     case IP_LOOKUP_NEXT_ICMP_ERROR:
1572     case IP_LOOKUP_N_NEXT:
1573       ASSERT (0);
1574       break;
1575     }
1576 }
1577
1578 int collect_detailed_interface_stats_flag = 0;
1579
1580 void
1581 collect_detailed_interface_stats_flag_set (void)
1582 {
1583   collect_detailed_interface_stats_flag = 1;
1584 }
1585
1586 void
1587 collect_detailed_interface_stats_flag_clear (void)
1588 {
1589   collect_detailed_interface_stats_flag = 0;
1590 }
1591
1592 static clib_error_t *
1593 collect_detailed_interface_stats_cli (vlib_main_t * vm,
1594                                       unformat_input_t * input,
1595                                       vlib_cli_command_t * cmd)
1596 {
1597   unformat_input_t _line_input, *line_input = &_line_input;
1598   clib_error_t *error = NULL;
1599
1600   /* Get a line of input. */
1601   if (!unformat_user (input, unformat_line_input, line_input))
1602     return clib_error_return (0, "expected enable | disable");
1603
1604   while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
1605     {
1606       if (unformat (line_input, "enable") || unformat (line_input, "on"))
1607         collect_detailed_interface_stats_flag_set ();
1608       else if (unformat (line_input, "disable")
1609                || unformat (line_input, "off"))
1610         collect_detailed_interface_stats_flag_clear ();
1611       else
1612         {
1613           error = clib_error_return (0, "unknown input `%U'",
1614                                      format_unformat_error, line_input);
1615           goto done;
1616         }
1617     }
1618
1619 done:
1620   unformat_free (line_input);
1621   return error;
1622 }
1623
1624 /* *INDENT-OFF* */
1625 VLIB_CLI_COMMAND (collect_detailed_interface_stats_command, static) = {
1626   .path = "interface collect detailed-stats",
1627   .short_help = "interface collect detailed-stats <enable|disable>",
1628   .function = collect_detailed_interface_stats_cli,
1629 };
1630 /* *INDENT-ON* */
1631
1632 /*
1633  * fd.io coding-style-patch-verification: ON
1634  *
1635  * Local Variables:
1636  * eval: (c-set-style "gnu")
1637  * End:
1638  */