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
 674   /* Bring down interface in case it is up. */
 675   if (sw->flags != 0)
 676     vnet_sw_interface_set_flags (vnm, sw_if_index, /* flags */ 0);
 677
 678   call_sw_interface_add_del_callbacks (vnm, sw_if_index, /* is_create */ 0);
 679
 680   pool_put (im->sw_interfaces, sw);
 681 }
 682
 683 static void
 684 setup_tx_node (vlib_main_t * vm,
 685                u32 node_index, vnet_device_class_t * dev_class)
 686 {
 687   vlib_node_t *n = vlib_get_node (vm, node_index);
 688
 689   n->function = dev_class->tx_function;
 690   n->format_trace = dev_class->format_tx_trace;
 691
 692   vlib_register_errors (vm, node_index,
 693                         dev_class->tx_function_n_errors,
 694                         dev_class->tx_function_error_strings);
 695 }
 696
 697 static void
 698 setup_output_node (vlib_main_t * vm,
 699                    u32 node_index, vnet_hw_interface_class_t * hw_class)
 700 {
 701   vlib_node_t *n = vlib_get_node (vm, node_index);
 702   n->format_buffer = hw_class->format_header;
 703   n->unformat_buffer = hw_class->unformat_header;
 704 }
 705
 706 /* Register an interface instance. */
 707 u32
 708 vnet_register_interface (vnet_main_t * vnm,
 709                          u32 dev_class_index,
 710                          u32 dev_instance,
 711                          u32 hw_class_index, u32 hw_instance)
 712 {
 713   vnet_interface_main_t *im = &vnm->interface_main;
 714   vnet_hw_interface_t *hw;
 715   vnet_device_class_t *dev_class =
 716     vnet_get_device_class (vnm, dev_class_index);
 717   vnet_hw_interface_class_t *hw_class =
 718     vnet_get_hw_interface_class (vnm, hw_class_index);
 719   vlib_main_t *vm = vnm->vlib_main;
 720   vnet_feature_config_main_t *fcm;
 721   vnet_config_main_t *cm;
 722   u32 hw_index, i;
 723   char *tx_node_name = NULL, *output_node_name = NULL;
 724
 725   pool_get (im->hw_interfaces, hw);
 726   memset (hw, 0, sizeof (*hw));
 727
 728   hw_index = hw - im->hw_interfaces;
 729   hw->hw_if_index = hw_index;
 730   hw->default_rx_mode = VNET_HW_INTERFACE_RX_MODE_POLLING;
 731
 732   if (dev_class->format_device_name)
 733     hw->name = format (0, "%U", dev_class->format_device_name, dev_instance);
 734   else if (hw_class->format_interface_name)
 735     hw->name = format (0, "%U", hw_class->format_interface_name,
 736                        dev_instance);
 737   else
 738     hw->name = format (0, "%s%x", hw_class->name, dev_instance);
 739
 740   if (!im->hw_interface_by_name)
 741     im->hw_interface_by_name = hash_create_vec ( /* size */ 0,
 742                                                 sizeof (hw->name[0]),
 743                                                 sizeof (uword));
 744
 745   hash_set_mem (im->hw_interface_by_name, hw->name, hw_index);
 746
 747   /* Make hardware interface point to software interface. */
 748   {
 749     vnet_sw_interface_t sw = {
 750       .type = VNET_SW_INTERFACE_TYPE_HARDWARE,
 751       .flood_class = VNET_FLOOD_CLASS_NORMAL,
 752       .hw_if_index = hw_index
 753     };
 754     hw->sw_if_index = vnet_create_sw_interface_no_callbacks (vnm, &sw);
 755   }
 756
 757   hw->dev_class_index = dev_class_index;
 758   hw->dev_instance = dev_instance;
 759   hw->hw_class_index = hw_class_index;
 760   hw->hw_instance = hw_instance;
 761
 762   hw->max_rate_bits_per_sec = 0;
 763   hw->min_packet_bytes = 0;
 764   hw->per_packet_overhead_bytes = 0;
 765   hw->max_l3_packet_bytes[VLIB_RX] = ~0;
 766   hw->max_l3_packet_bytes[VLIB_TX] = ~0;
 767
 768   if (dev_class->tx_function == 0)
 769     goto no_output_nodes;       /* No output/tx nodes to create */
 770
 771   tx_node_name = (char *) format (0, "%v-tx", hw->name);
 772   output_node_name = (char *) format (0, "%v-output", hw->name);
 773
 774   /* If we have previously deleted interface nodes, re-use them. */
 775   if (vec_len (im->deleted_hw_interface_nodes) > 0)
 776     {
 777       vnet_hw_interface_nodes_t *hn;
 778       vlib_node_t *node;
 779       vlib_node_runtime_t *nrt;
 780
 781       hn = vec_end (im->deleted_hw_interface_nodes) - 1;
 782
 783       hw->tx_node_index = hn->tx_node_index;
 784       hw->output_node_index = hn->output_node_index;
 785
 786       vlib_node_rename (vm, hw->tx_node_index, "%v", tx_node_name);
 787       vlib_node_rename (vm, hw->output_node_index, "%v", output_node_name);
 788
 789       /* *INDENT-OFF* */
 790       foreach_vlib_main ({
 791         vnet_interface_output_runtime_t *rt;
 792
 793         rt = vlib_node_get_runtime_data (this_vlib_main, hw->output_node_index);
 794         ASSERT (rt->is_deleted == 1);
 795         rt->is_deleted = 0;
 796         rt->hw_if_index = hw_index;
 797         rt->sw_if_index = hw->sw_if_index;
 798         rt->dev_instance = hw->dev_instance;
 799
 800         rt = vlib_node_get_runtime_data (this_vlib_main, hw->tx_node_index);
 801         rt->hw_if_index = hw_index;
 802         rt->sw_if_index = hw->sw_if_index;
 803         rt->dev_instance = hw->dev_instance;
 804       });
 805       /* *INDENT-ON* */
 806
 807       /* The new class may differ from the old one.
 808        * Functions have to be updated. */
 809       node = vlib_get_node (vm, hw->output_node_index);
 810       node->function = vnet_interface_output_node_multiarch_select ();
 811       node->format_trace = format_vnet_interface_output_trace;
 812       /* *INDENT-OFF* */
 813       foreach_vlib_main ({
 814         nrt = vlib_node_get_runtime (this_vlib_main, hw->output_node_index);
 815         nrt->function = node->function;
 816       });
 817       /* *INDENT-ON* */
 818
 819       node = vlib_get_node (vm, hw->tx_node_index);
 820       node->function = dev_class->tx_function;
 821       node->format_trace = dev_class->format_tx_trace;
 822       /* *INDENT-OFF* */
 823       foreach_vlib_main ({
 824         nrt = vlib_node_get_runtime (this_vlib_main, hw->tx_node_index);
 825         nrt->function = node->function;
 826       });
 827       /* *INDENT-ON* */
 828
 829       _vec_len (im->deleted_hw_interface_nodes) -= 1;
 830     }
 831   else
 832     {
 833       vlib_node_registration_t r;
 834       vnet_interface_output_runtime_t rt = {
 835         .hw_if_index = hw_index,
 836         .sw_if_index = hw->sw_if_index,
 837         .dev_instance = hw->dev_instance,
 838         .is_deleted = 0,
 839       };
 840
 841       memset (&r, 0, sizeof (r));
 842       r.type = VLIB_NODE_TYPE_INTERNAL;
 843       r.runtime_data = &rt;
 844       r.runtime_data_bytes = sizeof (rt);
 845       r.scalar_size = 0;
 846       r.vector_size = sizeof (u32);
 847
 848       r.flags = VLIB_NODE_FLAG_IS_OUTPUT;
 849       r.name = tx_node_name;
 850       r.function = dev_class->tx_function;
 851
 852       hw->tx_node_index = vlib_register_node (vm, &r);
 853
 854       vlib_node_add_named_next_with_slot (vm, hw->tx_node_index,
 855                                           "error-drop",
 856                                           VNET_INTERFACE_TX_NEXT_DROP);
 857
 858       r.flags = 0;
 859       r.name = output_node_name;
 860       r.function = vnet_interface_output_node_multiarch_select ();
 861       r.format_trace = format_vnet_interface_output_trace;
 862
 863       {
 864         static char *e[] = {
 865           "interface is down",
 866           "interface is deleted",
 867         };
 868
 869         r.n_errors = ARRAY_LEN (e);
 870         r.error_strings = e;
 871       }
 872       hw->output_node_index = vlib_register_node (vm, &r);
 873
 874       vlib_node_add_named_next_with_slot (vm, hw->output_node_index,
 875                                           "error-drop",
 876                                           VNET_INTERFACE_OUTPUT_NEXT_DROP);
 877       vlib_node_add_next_with_slot (vm, hw->output_node_index,
 878                                     hw->tx_node_index,
 879                                     VNET_INTERFACE_OUTPUT_NEXT_TX);
 880
 881       /* add interface to the list of "output-interface" feature arc start nodes
 882          and clone nexts from 1st interface if it exists */
 883       fcm = vnet_feature_get_config_main (im->output_feature_arc_index);
 884       cm = &fcm->config_main;
 885       i = vec_len (cm->start_node_indices);
 886       vec_validate (cm->start_node_indices, i);
 887       cm->start_node_indices[i] = hw->output_node_index;
 888       if (hw_index)
 889         {
 890           /* copy nexts from 1st interface */
 891           vnet_hw_interface_t *first_hw;
 892           vlib_node_t *first_node;
 893
 894           first_hw = vnet_get_hw_interface (vnm, /* hw_if_index */ 0);
 895           first_node = vlib_get_node (vm, first_hw->output_node_index);
 896
 897           /* 1st 2 nexts are already added above */
 898           for (i = 2; i < vec_len (first_node->next_nodes); i++)
 899             vlib_node_add_next_with_slot (vm, hw->output_node_index,
 900                                           first_node->next_nodes[i], i);
 901         }
 902     }
 903
 904   setup_output_node (vm, hw->output_node_index, hw_class);
 905   setup_tx_node (vm, hw->tx_node_index, dev_class);
 906
 907 no_output_nodes:
 908   /* Call all up/down callbacks with zero flags when interface is created. */
 909   vnet_sw_interface_set_flags_helper (vnm, hw->sw_if_index, /* flags */ 0,
 910                                       VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE);
 911   vnet_hw_interface_set_flags_helper (vnm, hw_index, /* flags */ 0,
 912                                       VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE);
 913   vec_free (tx_node_name);
 914   vec_free (output_node_name);
 915
 916   return hw_index;
 917 }
 918
 919 void
 920 vnet_delete_hw_interface (vnet_main_t * vnm, u32 hw_if_index)
 921 {
 922   vnet_interface_main_t *im = &vnm->interface_main;
 923   vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
 924   vlib_main_t *vm = vnm->vlib_main;
 925   vnet_device_class_t *dev_class = vnet_get_device_class (vnm,
 926                                                           hw->dev_class_index);
 927   /* If it is up, mark it down. */
 928   if (hw->flags != 0)
 929     vnet_hw_interface_set_flags (vnm, hw_if_index, /* flags */ 0);
 930
 931   /* Call delete callbacks. */
 932   call_hw_interface_add_del_callbacks (vnm, hw_if_index, /* is_create */ 0);
 933
 934   /* Delete any sub-interfaces. */
 935   {
 936     u32 id, sw_if_index;
 937     /* *INDENT-OFF* */
 938     hash_foreach (id, sw_if_index, hw->sub_interface_sw_if_index_by_id,
 939     ({
 940       vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
 941       u64 sup_and_sub_key =
 942         ((u64) (si->sup_sw_if_index) << 32) | (u64) si->sub.id;
 943       hash_unset_mem_free (&im->sw_if_index_by_sup_and_sub, &sup_and_sub_key);
 944       vnet_delete_sw_interface (vnm, sw_if_index);
 945     }));
 946     hash_free (hw->sub_interface_sw_if_index_by_id);
 947     /* *INDENT-ON* */
 948   }
 949
 950   /* Delete software interface corresponding to hardware interface. */
 951   vnet_delete_sw_interface (vnm, hw->sw_if_index);
 952
 953   if (dev_class->tx_function)
 954     {
 955       /* Put output/tx nodes into recycle pool */
 956       vnet_hw_interface_nodes_t *dn;
 957
 958       /* *INDENT-OFF* */
 959       foreach_vlib_main
 960         ({
 961           vnet_interface_output_runtime_t *rt =
 962             vlib_node_get_runtime_data (this_vlib_main, hw->output_node_index);
 963
 964           /* Mark node runtime as deleted so output node (if called)
 965            * will drop packets. */
 966           rt->is_deleted = 1;
 967         });
 968       /* *INDENT-ON* */
 969
 970       vlib_node_rename (vm, hw->output_node_index,
 971                         "interface-%d-output-deleted", hw_if_index);
 972       vlib_node_rename (vm, hw->tx_node_index, "interface-%d-tx-deleted",
 973                         hw_if_index);
 974       vec_add2 (im->deleted_hw_interface_nodes, dn, 1);
 975       dn->tx_node_index = hw->tx_node_index;
 976       dn->output_node_index = hw->output_node_index;
 977     }
 978
 979   hash_unset_mem (im->hw_interface_by_name, hw->name);
 980   vec_free (hw->name);
 981   vec_free (hw->hw_address);
 982   vec_free (hw->input_node_thread_index_by_queue);
 983   vec_free (hw->dq_runtime_index_by_queue);
 984
 985   pool_put (im->hw_interfaces, hw);
 986 }
 987
 988 void
 989 vnet_hw_interface_walk_sw (vnet_main_t * vnm,
 990                            u32 hw_if_index,
 991                            vnet_hw_sw_interface_walk_t fn, void *ctx)
 992 {
 993   vnet_hw_interface_t *hi;
 994   u32 id, sw_if_index;
 995
 996   hi = vnet_get_hw_interface (vnm, hw_if_index);
 997   /* the super first, then the and sub interfaces */
 998   fn (vnm, hi->sw_if_index, ctx);
 999
1000   /* *INDENT-OFF* */
1001   hash_foreach (id, sw_if_index,
1002                 hi->sub_interface_sw_if_index_by_id,
1003   ({
1004     if (WALK_STOP == fn (vnm, sw_if_index, ctx))
1005       break;
1006   }));
1007   /* *INDENT-ON* */
1008 }
1009
1010 void
1011 vnet_sw_interface_walk (vnet_main_t * vnm,
1012                         vnet_sw_interface_walk_t fn, void *ctx)
1013 {
1014   vnet_interface_main_t *im;
1015   vnet_sw_interface_t *si;
1016
1017   im = &vnm->interface_main;
1018
1019   /* *INDENT-OFF* */
1020   pool_foreach (si, im->sw_interfaces,
1021   {
1022     if (WALK_STOP == fn (vnm, si, ctx))
1023       break;
1024   });
1025   /* *INDENT-ON* */
1026 }
1027
1028 static void
1029 serialize_vnet_hw_interface_set_class (serialize_main_t * m, va_list * va)
1030 {
1031   u32 hw_if_index = va_arg (*va, u32);
1032   char *hw_class_name = va_arg (*va, char *);
1033   serialize_integer (m, hw_if_index, sizeof (hw_if_index));
1034   serialize_cstring (m, hw_class_name);
1035 }
1036
1037 static void
1038 unserialize_vnet_hw_interface_set_class (serialize_main_t * m, va_list * va)
1039 {
1040   CLIB_UNUSED (mc_main_t * mc) = va_arg (*va, mc_main_t *);
1041   vnet_main_t *vnm = vnet_get_main ();
1042   u32 hw_if_index;
1043   char *hw_class_name;
1044   uword *p;
1045   clib_error_t *error;
1046
1047   unserialize_integer (m, &hw_if_index, sizeof (hw_if_index));
1048   unserialize_cstring (m, &hw_class_name);
1049   p =
1050     hash_get (vnm->interface_main.hw_interface_class_by_name, hw_class_name);
1051   ASSERT (p != 0);
1052   error = vnet_hw_interface_set_class_helper (vnm, hw_if_index, p[0],
1053                                               /* redistribute */ 0);
1054   if (error)
1055     clib_error_report (error);
1056 }
1057
1058 MC_SERIALIZE_MSG (vnet_hw_interface_set_class_msg, static) =
1059 {
1060 .name = "vnet_hw_interface_set_class",.serialize =
1061     serialize_vnet_hw_interface_set_class,.unserialize =
1062     unserialize_vnet_hw_interface_set_class,};
1063
1064 void
1065 vnet_hw_interface_init_for_class (vnet_main_t * vnm, u32 hw_if_index,
1066                                   u32 hw_class_index, u32 hw_instance)
1067 {
1068   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1069   vnet_hw_interface_class_t *hc =
1070     vnet_get_hw_interface_class (vnm, hw_class_index);
1071
1072   hi->hw_class_index = hw_class_index;
1073   hi->hw_instance = hw_instance;
1074   setup_output_node (vnm->vlib_main, hi->output_node_index, hc);
1075 }
1076
1077 static clib_error_t *
1078 vnet_hw_interface_set_class_helper (vnet_main_t * vnm, u32 hw_if_index,
1079                                     u32 hw_class_index, u32 redistribute)
1080 {
1081   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1082   vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, hi->sw_if_index);
1083   vnet_hw_interface_class_t *old_class =
1084     vnet_get_hw_interface_class (vnm, hi->hw_class_index);
1085   vnet_hw_interface_class_t *new_class =
1086     vnet_get_hw_interface_class (vnm, hw_class_index);
1087   vnet_device_class_t *dev_class =
1088     vnet_get_device_class (vnm, hi->dev_class_index);
1089   clib_error_t *error = 0;
1090
1091   /* New class equals old class?  Nothing to do. */
1092   if (hi->hw_class_index == hw_class_index)
1093     return 0;
1094
1095   /* No need (and incorrect since admin up flag may be set) to do error checking when
1096      receiving unserialize message. */
1097   if (redistribute)
1098     {
1099       if (si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
1100         return clib_error_return (0,
1101                                   "%v must be admin down to change class from %s to %s",
1102                                   hi->name, old_class->name, new_class->name);
1103
1104       /* Make sure interface supports given class. */
1105       if ((new_class->is_valid_class_for_interface
1106            && !new_class->is_valid_class_for_interface (vnm, hw_if_index,
1107                                                         hw_class_index))
1108           || (dev_class->is_valid_class_for_interface
1109               && !dev_class->is_valid_class_for_interface (vnm, hw_if_index,
1110                                                            hw_class_index)))
1111         return clib_error_return (0,
1112                                   "%v class cannot be changed from %s to %s",
1113                                   hi->name, old_class->name, new_class->name);
1114
1115       if (vnm->vlib_main->mc_main)
1116         {
1117           mc_serialize (vnm->vlib_main->mc_main,
1118                         &vnet_hw_interface_set_class_msg, hw_if_index,
1119                         new_class->name);
1120           return 0;
1121         }
1122     }
1123
1124   if (old_class->hw_class_change)
1125     old_class->hw_class_change (vnm, hw_if_index, old_class->index,
1126                                 new_class->index);
1127
1128   vnet_hw_interface_init_for_class (vnm, hw_if_index, new_class->index,
1129                                     /* instance */ ~0);
1130
1131   if (new_class->hw_class_change)
1132     new_class->hw_class_change (vnm, hw_if_index, old_class->index,
1133                                 new_class->index);
1134
1135   if (dev_class->hw_class_change)
1136     dev_class->hw_class_change (vnm, hw_if_index, new_class->index);
1137
1138   return error;
1139 }
1140
1141 clib_error_t *
1142 vnet_hw_interface_set_class (vnet_main_t * vnm, u32 hw_if_index,
1143                              u32 hw_class_index)
1144 {
1145   return vnet_hw_interface_set_class_helper (vnm, hw_if_index, hw_class_index,
1146                                              /* redistribute */ 1);
1147 }
1148
1149 static int
1150 vnet_hw_interface_rx_redirect_to_node_helper (vnet_main_t * vnm,
1151                                               u32 hw_if_index,
1152                                               u32 node_index,
1153                                               u32 redistribute)
1154 {
1155   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1156   vnet_device_class_t *dev_class = vnet_get_device_class
1157     (vnm, hi->dev_class_index);
1158
1159   if (redistribute)
1160     {
1161       /* $$$$ fixme someday maybe */
1162       ASSERT (vnm->vlib_main->mc_main == 0);
1163     }
1164   if (dev_class->rx_redirect_to_node)
1165     {
1166       dev_class->rx_redirect_to_node (vnm, hw_if_index, node_index);
1167       return 0;
1168     }
1169
1170   return VNET_API_ERROR_UNIMPLEMENTED;
1171 }
1172
1173 int
1174 vnet_hw_interface_rx_redirect_to_node (vnet_main_t * vnm, u32 hw_if_index,
1175                                        u32 node_index)
1176 {
1177   return vnet_hw_interface_rx_redirect_to_node_helper (vnm, hw_if_index,
1178                                                        node_index,
1179                                                        1 /* redistribute */ );
1180 }
1181
1182 word
1183 vnet_sw_interface_compare (vnet_main_t * vnm,
1184                            uword sw_if_index0, uword sw_if_index1)
1185 {
1186   vnet_sw_interface_t *sup0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1187   vnet_sw_interface_t *sup1 = vnet_get_sup_sw_interface (vnm, sw_if_index1);
1188   vnet_hw_interface_t *h0 = vnet_get_hw_interface (vnm, sup0->hw_if_index);
1189   vnet_hw_interface_t *h1 = vnet_get_hw_interface (vnm, sup1->hw_if_index);
1190
1191   if (h0 != h1)
1192     return vec_cmp (h0->name, h1->name);
1193   return (word) h0->hw_instance - (word) h1->hw_instance;
1194 }
1195
1196 word
1197 vnet_hw_interface_compare (vnet_main_t * vnm,
1198                            uword hw_if_index0, uword hw_if_index1)
1199 {
1200   vnet_hw_interface_t *h0 = vnet_get_hw_interface (vnm, hw_if_index0);
1201   vnet_hw_interface_t *h1 = vnet_get_hw_interface (vnm, hw_if_index1);
1202
1203   if (h0 != h1)
1204     return vec_cmp (h0->name, h1->name);
1205   return (word) h0->hw_instance - (word) h1->hw_instance;
1206 }
1207
1208 int
1209 vnet_sw_interface_is_p2p (vnet_main_t * vnm, u32 sw_if_index)
1210 {
1211   vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
1212   if (si->type == VNET_SW_INTERFACE_TYPE_P2P)
1213     return 1;
1214
1215   vnet_hw_interface_t *hw = vnet_get_sup_hw_interface (vnm, sw_if_index);
1216   vnet_hw_interface_class_t *hc =
1217     vnet_get_hw_interface_class (vnm, hw->hw_class_index);
1218
1219   return (hc->flags & VNET_HW_INTERFACE_CLASS_FLAG_P2P);
1220 }
1221
1222 clib_error_t *
1223 vnet_interface_init (vlib_main_t * vm)
1224 {
1225   vnet_main_t *vnm = vnet_get_main ();
1226   vnet_interface_main_t *im = &vnm->interface_main;
1227   vlib_buffer_t *b = 0;
1228   vnet_buffer_opaque_t *o = 0;
1229   clib_error_t *error;
1230
1231   /*
1232    * Keep people from shooting themselves in the foot.
1233    */
1234   if (sizeof (b->opaque) != sizeof (vnet_buffer_opaque_t))
1235     {
1236 #define _(a) if (sizeof(o->a) > sizeof (o->unused))                     \
1237       clib_warning                                                      \
1238         ("FATAL: size of opaque union subtype %s is %d (max %d)",       \
1239          #a, sizeof(o->a), sizeof (o->unused));
1240       foreach_buffer_opaque_union_subtype;
1241 #undef _
1242
1243       return clib_error_return
1244         (0, "FATAL: size of vlib buffer opaque %d, size of vnet opaque %d",
1245          sizeof (b->opaque), sizeof (vnet_buffer_opaque_t));
1246     }
1247
1248   im->sw_if_counter_lock = clib_mem_alloc_aligned (CLIB_CACHE_LINE_BYTES,
1249                                                    CLIB_CACHE_LINE_BYTES);
1250   im->sw_if_counter_lock[0] = 1;        /* should be no need */
1251
1252   vec_validate (im->sw_if_counters, VNET_N_SIMPLE_INTERFACE_COUNTER - 1);
1253   im->sw_if_counters[VNET_INTERFACE_COUNTER_DROP].name = "drops";
1254   im->sw_if_counters[VNET_INTERFACE_COUNTER_PUNT].name = "punts";
1255   im->sw_if_counters[VNET_INTERFACE_COUNTER_IP4].name = "ip4";
1256   im->sw_if_counters[VNET_INTERFACE_COUNTER_IP6].name = "ip6";
1257   im->sw_if_counters[VNET_INTERFACE_COUNTER_RX_NO_BUF].name = "rx-no-buf";
1258   im->sw_if_counters[VNET_INTERFACE_COUNTER_RX_MISS].name = "rx-miss";
1259   im->sw_if_counters[VNET_INTERFACE_COUNTER_RX_ERROR].name = "rx-error";
1260   im->sw_if_counters[VNET_INTERFACE_COUNTER_TX_ERROR].name = "tx-error";
1261
1262   vec_validate (im->combined_sw_if_counters,
1263                 VNET_N_COMBINED_INTERFACE_COUNTER - 1);
1264   im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_RX].name = "rx";
1265   im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_RX_UNICAST].name =
1266     "rx-unicast";
1267   im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_RX_MULTICAST].name =
1268     "rx-multicast";
1269   im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_RX_BROADCAST].name =
1270     "rx-broadcast";
1271   im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_TX].name = "tx";
1272   im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_TX_UNICAST].name =
1273     "tx-unicast";
1274   im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_TX_MULTICAST].name =
1275     "tx-multicast";
1276   im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_TX_BROADCAST].name =
1277     "tx-broadcast";
1278
1279   im->sw_if_counter_lock[0] = 0;
1280
1281   im->device_class_by_name = hash_create_string ( /* size */ 0,
1282                                                  sizeof (uword));
1283   {
1284     vnet_device_class_t *c;
1285
1286     c = vnm->device_class_registrations;
1287
1288     while (c)
1289       {
1290         c->index = vec_len (im->device_classes);
1291         hash_set_mem (im->device_class_by_name, c->name, c->index);
1292         vec_add1 (im->device_classes, c[0]);
1293         c = c->next_class_registration;
1294       }
1295   }
1296
1297   im->hw_interface_class_by_name = hash_create_string ( /* size */ 0,
1298                                                        sizeof (uword));
1299
1300   im->sw_if_index_by_sup_and_sub = hash_create_mem (0, sizeof (u64),
1301                                                     sizeof (uword));
1302   {
1303     vnet_hw_interface_class_t *c;
1304
1305     c = vnm->hw_interface_class_registrations;
1306
1307     while (c)
1308       {
1309         c->index = vec_len (im->hw_interface_classes);
1310         hash_set_mem (im->hw_interface_class_by_name, c->name, c->index);
1311
1312         if (NULL == c->build_rewrite)
1313           c->build_rewrite = default_build_rewrite;
1314         if (NULL == c->update_adjacency)
1315           c->update_adjacency = default_update_adjacency;
1316
1317         vec_add1 (im->hw_interface_classes, c[0]);
1318         c = c->next_class_registration;
1319       }
1320   }
1321
1322   if ((error = vlib_call_init_function (vm, vnet_interface_cli_init)))
1323     return error;
1324
1325   vnm->interface_tag_by_sw_if_index = hash_create (0, sizeof (uword));
1326
1327 #if VLIB_BUFFER_TRACE_TRAJECTORY > 0
1328   if ((error = vlib_call_init_function (vm, trajectory_trace_init)))
1329     return error;
1330 #endif
1331
1332   return 0;
1333 }
1334
1335 VLIB_INIT_FUNCTION (vnet_interface_init);
1336
1337 /* Kludge to renumber interface names [only!] */
1338 int
1339 vnet_interface_name_renumber (u32 sw_if_index, u32 new_show_dev_instance)
1340 {
1341   int rv;
1342   vnet_main_t *vnm = vnet_get_main ();
1343   vnet_interface_main_t *im = &vnm->interface_main;
1344   vnet_hw_interface_t *hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
1345
1346   vnet_device_class_t *dev_class = vnet_get_device_class
1347     (vnm, hi->dev_class_index);
1348
1349   if (dev_class->name_renumber == 0 || dev_class->format_device_name == 0)
1350     return VNET_API_ERROR_UNIMPLEMENTED;
1351
1352   rv = dev_class->name_renumber (hi, new_show_dev_instance);
1353
1354   if (rv)
1355     return rv;
1356
1357   hash_unset_mem (im->hw_interface_by_name, hi->name);
1358   vec_free (hi->name);
1359   /* Use the mapping we set up to call it Ishmael */
1360   hi->name = format (0, "%U", dev_class->format_device_name,
1361                      hi->dev_instance);
1362
1363   hash_set_mem (im->hw_interface_by_name, hi->name, hi->hw_if_index);
1364   return rv;
1365 }
1366
1367 clib_error_t *
1368 vnet_rename_interface (vnet_main_t * vnm, u32 hw_if_index, char *new_name)
1369 {
1370   vnet_interface_main_t *im = &vnm->interface_main;
1371   vlib_main_t *vm = vnm->vlib_main;
1372   vnet_hw_interface_t *hw;
1373   u8 *old_name;
1374   clib_error_t *error = 0;
1375
1376   hw = vnet_get_hw_interface (vnm, hw_if_index);
1377   if (!hw)
1378     {
1379       return clib_error_return (0,
1380                                 "unable to find hw interface for index %u",
1381                                 hw_if_index);
1382     }
1383
1384   old_name = hw->name;
1385
1386   /* set new hw->name */
1387   hw->name = format (0, "%s", new_name);
1388
1389   /* remove the old name to hw_if_index mapping and install the new one */
1390   hash_unset_mem (im->hw_interface_by_name, old_name);
1391   hash_set_mem (im->hw_interface_by_name, hw->name, hw_if_index);
1392
1393   /* rename tx/output nodes */
1394   vlib_node_rename (vm, hw->tx_node_index, "%v-tx", hw->name);
1395   vlib_node_rename (vm, hw->output_node_index, "%v-output", hw->name);
1396
1397   /* free the old name vector */
1398   vec_free (old_name);
1399
1400   return error;
1401 }
1402
1403 static clib_error_t *
1404 vnet_hw_interface_change_mac_address_helper (vnet_main_t * vnm,
1405                                              u32 hw_if_index,
1406                                              u8 * mac_address)
1407 {
1408   clib_error_t *error = 0;
1409   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1410
1411   if (hi->hw_address)
1412     {
1413       vnet_device_class_t *dev_class =
1414         vnet_get_device_class (vnm, hi->dev_class_index);
1415       if (dev_class->mac_addr_change_function)
1416         {
1417           error =
1418             dev_class->mac_addr_change_function (hi, (char *) mac_address);
1419         }
1420       if (!error)
1421         {
1422           vnet_hw_interface_class_t *hw_class;
1423
1424           hw_class = vnet_get_hw_interface_class (vnm, hi->hw_class_index);
1425
1426           if (NULL != hw_class->mac_addr_change_function)
1427             hw_class->mac_addr_change_function (hi, (char *) mac_address);
1428         }
1429       else
1430         {
1431           error =
1432             clib_error_return (0,
1433                                "MAC Address Change is not supported on this interface");
1434         }
1435     }
1436   else
1437     {
1438       error =
1439         clib_error_return (0,
1440                            "mac address change is not supported for interface index %u",
1441                            hw_if_index);
1442     }
1443   return error;
1444 }
1445
1446 clib_error_t *
1447 vnet_hw_interface_change_mac_address (vnet_main_t * vnm, u32 hw_if_index,
1448                                       u8 * mac_address)
1449 {
1450   return vnet_hw_interface_change_mac_address_helper
1451     (vnm, hw_if_index, mac_address);
1452 }
1453
1454 /* update the unnumbered state of an interface*/
1455 void
1456 vnet_sw_interface_update_unnumbered (u32 unnumbered_sw_if_index,
1457                                      u32 ip_sw_if_index, u8 enable)
1458 {
1459   vnet_main_t *vnm = vnet_get_main ();
1460   vnet_sw_interface_t *si;
1461   u32 was_unnum;
1462
1463   si = vnet_get_sw_interface (vnm, unnumbered_sw_if_index);
1464   was_unnum = (si->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED);
1465
1466   if (enable)
1467     {
1468       si->flags |= VNET_SW_INTERFACE_FLAG_UNNUMBERED;
1469       si->unnumbered_sw_if_index = ip_sw_if_index;
1470
1471       ip4_main.lookup_main.if_address_pool_index_by_sw_if_index
1472         [unnumbered_sw_if_index] =
1473         ip4_main.
1474         lookup_main.if_address_pool_index_by_sw_if_index[ip_sw_if_index];
1475       ip6_main.
1476         lookup_main.if_address_pool_index_by_sw_if_index
1477         [unnumbered_sw_if_index] =
1478         ip6_main.
1479         lookup_main.if_address_pool_index_by_sw_if_index[ip_sw_if_index];
1480     }
1481   else
1482     {
1483       si->flags &= ~(VNET_SW_INTERFACE_FLAG_UNNUMBERED);
1484       si->unnumbered_sw_if_index = (u32) ~ 0;
1485
1486       ip4_main.lookup_main.if_address_pool_index_by_sw_if_index
1487         [unnumbered_sw_if_index] = ~0;
1488       ip6_main.lookup_main.if_address_pool_index_by_sw_if_index
1489         [unnumbered_sw_if_index] = ~0;
1490     }
1491
1492   if (was_unnum != (si->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED))
1493     {
1494       ip4_sw_interface_enable_disable (unnumbered_sw_if_index, enable);
1495       ip6_sw_interface_enable_disable (unnumbered_sw_if_index, enable);
1496     }
1497 }
1498
1499 vnet_l3_packet_type_t
1500 vnet_link_to_l3_proto (vnet_link_t link)
1501 {
1502   switch (link)
1503     {
1504     case VNET_LINK_IP4:
1505       return (VNET_L3_PACKET_TYPE_IP4);
1506     case VNET_LINK_IP6:
1507       return (VNET_L3_PACKET_TYPE_IP6);
1508     case VNET_LINK_MPLS:
1509       return (VNET_L3_PACKET_TYPE_MPLS);
1510     case VNET_LINK_ARP:
1511       return (VNET_L3_PACKET_TYPE_ARP);
1512     case VNET_LINK_ETHERNET:
1513     case VNET_LINK_NSH:
1514       ASSERT (0);
1515       break;
1516     }
1517   ASSERT (0);
1518   return (0);
1519 }
1520
1521 u8 *
1522 default_build_rewrite (vnet_main_t * vnm,
1523                        u32 sw_if_index,
1524                        vnet_link_t link_type, const void *dst_address)
1525 {
1526   return (NULL);
1527 }
1528
1529 void
1530 default_update_adjacency (vnet_main_t * vnm, u32 sw_if_index, u32 ai)
1531 {
1532   ip_adjacency_t *adj;
1533
1534   adj = adj_get (ai);
1535
1536   switch (adj->lookup_next_index)
1537     {
1538     case IP_LOOKUP_NEXT_GLEAN:
1539       adj_glean_update_rewrite (ai);
1540       break;
1541     case IP_LOOKUP_NEXT_ARP:
1542       /*
1543        * default rewirte in neighbour adj
1544        */
1545       adj_nbr_update_rewrite
1546         (ai,
1547          ADJ_NBR_REWRITE_FLAG_COMPLETE,
1548          vnet_build_rewrite_for_sw_interface (vnm,
1549                                               sw_if_index,
1550                                               adj_get_link_type (ai), NULL));
1551       break;
1552     case IP_LOOKUP_NEXT_MCAST:
1553       /*
1554        * mcast traffic also uses default rewrite string with no mcast
1555        * switch time updates.
1556        */
1557       adj_mcast_update_rewrite
1558         (ai,
1559          vnet_build_rewrite_for_sw_interface (vnm,
1560                                               sw_if_index,
1561                                               adj_get_link_type (ai),
1562                                               NULL), 0);
1563       break;
1564     case IP_LOOKUP_NEXT_DROP:
1565     case IP_LOOKUP_NEXT_PUNT:
1566     case IP_LOOKUP_NEXT_LOCAL:
1567     case IP_LOOKUP_NEXT_REWRITE:
1568     case IP_LOOKUP_NEXT_MCAST_MIDCHAIN:
1569     case IP_LOOKUP_NEXT_MIDCHAIN:
1570     case IP_LOOKUP_NEXT_ICMP_ERROR:
1571     case IP_LOOKUP_N_NEXT:
1572       ASSERT (0);
1573       break;
1574     }
1575 }
1576
1577 int collect_detailed_interface_stats_flag = 0;
1578
1579 void
1580 collect_detailed_interface_stats_flag_set (void)
1581 {
1582   collect_detailed_interface_stats_flag = 1;
1583 }
1584
1585 void
1586 collect_detailed_interface_stats_flag_clear (void)
1587 {
1588   collect_detailed_interface_stats_flag = 0;
1589 }
1590
1591 static clib_error_t *
1592 collect_detailed_interface_stats_cli (vlib_main_t * vm,
1593                                       unformat_input_t * input,
1594                                       vlib_cli_command_t * cmd)
1595 {
1596   unformat_input_t _line_input, *line_input = &_line_input;
1597   clib_error_t *error = NULL;
1598
1599   /* Get a line of input. */
1600   if (!unformat_user (input, unformat_line_input, line_input))
1601     return clib_error_return (0, "expected enable | disable");
1602
1603   while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
1604     {
1605       if (unformat (line_input, "enable") || unformat (line_input, "on"))
1606         collect_detailed_interface_stats_flag_set ();
1607       else if (unformat (line_input, "disable")
1608                || unformat (line_input, "off"))
1609         collect_detailed_interface_stats_flag_clear ();
1610       else
1611         {
1612           error = clib_error_return (0, "unknown input `%U'",
1613                                      format_unformat_error, line_input);
1614           goto done;
1615         }
1616     }
1617
1618 done:
1619   unformat_free (line_input);
1620   return error;
1621 }
1622
1623 /* *INDENT-OFF* */
1624 VLIB_CLI_COMMAND (collect_detailed_interface_stats_command, static) = {
1625   .path = "interface collect detailed-stats",
1626   .short_help = "interface collect detailed-stats <enable|disable>",
1627   .function = collect_detailed_interface_stats_cli,
1628 };
1629 /* *INDENT-ON* */
1630
1631 /*
1632  * fd.io coding-style-patch-verification: ON
1633  *
1634  * Local Variables:
1635  * eval: (c-set-style "gnu")
1636  * End:
1637  */