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       si->flags = old_flags;
 489
 490       if (error)
 491         goto done;
 492
 493       if (si->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
 494         {
 495           vnet_hw_interface_t *hi =
 496             vnet_get_hw_interface (vnm, si->hw_if_index);
 497           vnet_hw_interface_class_t *hw_class =
 498             vnet_get_hw_interface_class (vnm, hi->hw_class_index);
 499           vnet_device_class_t *dev_class =
 500             vnet_get_device_class (vnm, hi->dev_class_index);
 501
 502           if ((flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) &&
 503               (si->flags & VNET_SW_INTERFACE_FLAG_ERROR))
 504             {
 505               error = clib_error_return (0, "Interface in the error state");
 506               goto done;
 507             }
 508
 509           /* save the si admin up flag */
 510           old_flags = si->flags;
 511
 512           /* update si admin up flag in advance if we are going admin down */
 513           if (!(flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
 514             si->flags &= ~VNET_SW_INTERFACE_FLAG_ADMIN_UP;
 515
 516           if (dev_class->admin_up_down_function
 517               && (error = dev_class->admin_up_down_function (vnm,
 518                                                              si->hw_if_index,
 519                                                              flags)))
 520             {
 521               /* restore si admin up flag to it's original state on errors */
 522               si->flags = old_flags;
 523               goto done;
 524             }
 525
 526           if (hw_class->admin_up_down_function
 527               && (error = hw_class->admin_up_down_function (vnm,
 528                                                             si->hw_if_index,
 529                                                             flags)))
 530             {
 531               /* restore si admin up flag to it's original state on errors */
 532               si->flags = old_flags;
 533               goto done;
 534             }
 535
 536           /* Admin down implies link down. */
 537           if (!(flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
 538               && (hi->flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
 539             vnet_hw_interface_set_flags_helper (vnm, si->hw_if_index,
 540                                                 hi->flags &
 541                                                 ~VNET_HW_INTERFACE_FLAG_LINK_UP,
 542                                                 helper_flags);
 543         }
 544     }
 545
 546   si->flags &= ~mask;
 547   si->flags |= flags;
 548
 549 done:
 550   return error;
 551 }
 552
 553 clib_error_t *
 554 vnet_hw_interface_set_flags (vnet_main_t * vnm, u32 hw_if_index, u32 flags)
 555 {
 556   return vnet_hw_interface_set_flags_helper
 557     (vnm, hw_if_index, flags,
 558      VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE);
 559 }
 560
 561 clib_error_t *
 562 vnet_sw_interface_set_flags (vnet_main_t * vnm, u32 sw_if_index, u32 flags)
 563 {
 564   return vnet_sw_interface_set_flags_helper
 565     (vnm, sw_if_index, flags,
 566      VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE);
 567 }
 568
 569 static u32
 570 vnet_create_sw_interface_no_callbacks (vnet_main_t * vnm,
 571                                        vnet_sw_interface_t * template)
 572 {
 573   vnet_interface_main_t *im = &vnm->interface_main;
 574   vnet_sw_interface_t *sw;
 575   u32 sw_if_index;
 576
 577   pool_get (im->sw_interfaces, sw);
 578   sw_if_index = sw - im->sw_interfaces;
 579
 580   sw[0] = template[0];
 581
 582   sw->flags = 0;
 583   sw->sw_if_index = sw_if_index;
 584   if (sw->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
 585     sw->sup_sw_if_index = sw->sw_if_index;
 586
 587   /* Allocate counters for this interface. */
 588   {
 589     u32 i;
 590
 591     vnet_interface_counter_lock (im);
 592
 593     for (i = 0; i < vec_len (im->sw_if_counters); i++)
 594       {
 595         vlib_validate_simple_counter (&im->sw_if_counters[i], sw_if_index);
 596         vlib_zero_simple_counter (&im->sw_if_counters[i], sw_if_index);
 597       }
 598
 599     for (i = 0; i < vec_len (im->combined_sw_if_counters); i++)
 600       {
 601         vlib_validate_combined_counter (&im->combined_sw_if_counters[i],
 602                                         sw_if_index);
 603         vlib_zero_combined_counter (&im->combined_sw_if_counters[i],
 604                                     sw_if_index);
 605       }
 606
 607     vnet_interface_counter_unlock (im);
 608   }
 609
 610   return sw_if_index;
 611 }
 612
 613 clib_error_t *
 614 vnet_create_sw_interface (vnet_main_t * vnm, vnet_sw_interface_t * template,
 615                           u32 * sw_if_index)
 616 {
 617   clib_error_t *error;
 618   vnet_hw_interface_t *hi;
 619   vnet_device_class_t *dev_class;
 620
 621   hi = vnet_get_sup_hw_interface (vnm, template->sup_sw_if_index);
 622   dev_class = vnet_get_device_class (vnm, hi->dev_class_index);
 623
 624   if (template->type == VNET_SW_INTERFACE_TYPE_SUB &&
 625       dev_class->subif_add_del_function)
 626     {
 627       error = dev_class->subif_add_del_function (vnm, hi->hw_if_index,
 628                                                  (struct vnet_sw_interface_t
 629                                                   *) template, 1);
 630       if (error)
 631         return error;
 632     }
 633
 634   *sw_if_index = vnet_create_sw_interface_no_callbacks (vnm, template);
 635   error = vnet_sw_interface_set_flags_helper
 636     (vnm, *sw_if_index, template->flags,
 637      VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE);
 638
 639   if (error)
 640     {
 641       /* undo the work done by vnet_create_sw_interface_no_callbacks() */
 642       vnet_interface_main_t *im = &vnm->interface_main;
 643       vnet_sw_interface_t *sw =
 644         pool_elt_at_index (im->sw_interfaces, *sw_if_index);
 645       pool_put (im->sw_interfaces, sw);
 646     }
 647
 648   return error;
 649 }
 650
 651 void
 652 vnet_delete_sw_interface (vnet_main_t * vnm, u32 sw_if_index)
 653 {
 654   vnet_interface_main_t *im = &vnm->interface_main;
 655   vnet_sw_interface_t *sw =
 656     pool_elt_at_index (im->sw_interfaces, sw_if_index);
 657
 658   /* Check if the interface has config and is removed from L2 BD or XConnect */
 659   vlib_main_t *vm = vlib_get_main ();
 660   l2_input_config_t *config;
 661   if (sw_if_index < vec_len (l2input_main.configs))
 662     {
 663       config = vec_elt_at_index (l2input_main.configs, sw_if_index);
 664       if (config->xconnect)
 665         set_int_l2_mode (vm, vnm, MODE_L3, config->output_sw_if_index, 0, 0,
 666                          0, 0);
 667       if (config->xconnect || config->bridge)
 668         set_int_l2_mode (vm, vnm, MODE_L3, sw_if_index, 0, 0, 0, 0);
 669     }
 670
 671   /* Bring down interface in case it is up. */
 672   if (sw->flags != 0)
 673     vnet_sw_interface_set_flags (vnm, sw_if_index, /* flags */ 0);
 674
 675   call_sw_interface_add_del_callbacks (vnm, sw_if_index, /* is_create */ 0);
 676
 677   pool_put (im->sw_interfaces, sw);
 678 }
 679
 680 static void
 681 setup_tx_node (vlib_main_t * vm,
 682                u32 node_index, vnet_device_class_t * dev_class)
 683 {
 684   vlib_node_t *n = vlib_get_node (vm, node_index);
 685
 686   n->function = dev_class->tx_function;
 687   n->format_trace = dev_class->format_tx_trace;
 688
 689   vlib_register_errors (vm, node_index,
 690                         dev_class->tx_function_n_errors,
 691                         dev_class->tx_function_error_strings);
 692 }
 693
 694 static void
 695 setup_output_node (vlib_main_t * vm,
 696                    u32 node_index, vnet_hw_interface_class_t * hw_class)
 697 {
 698   vlib_node_t *n = vlib_get_node (vm, node_index);
 699   n->format_buffer = hw_class->format_header;
 700   n->unformat_buffer = hw_class->unformat_header;
 701 }
 702
 703 /* Register an interface instance. */
 704 u32
 705 vnet_register_interface (vnet_main_t * vnm,
 706                          u32 dev_class_index,
 707                          u32 dev_instance,
 708                          u32 hw_class_index, u32 hw_instance)
 709 {
 710   vnet_interface_main_t *im = &vnm->interface_main;
 711   vnet_hw_interface_t *hw;
 712   vnet_device_class_t *dev_class =
 713     vnet_get_device_class (vnm, dev_class_index);
 714   vnet_hw_interface_class_t *hw_class =
 715     vnet_get_hw_interface_class (vnm, hw_class_index);
 716   vlib_main_t *vm = vnm->vlib_main;
 717   vnet_feature_config_main_t *fcm;
 718   vnet_config_main_t *cm;
 719   u32 hw_index, i;
 720   char *tx_node_name = NULL, *output_node_name = NULL;
 721
 722   pool_get (im->hw_interfaces, hw);
 723   memset (hw, 0, sizeof (*hw));
 724
 725   hw_index = hw - im->hw_interfaces;
 726   hw->hw_if_index = hw_index;
 727   hw->default_rx_mode = VNET_HW_INTERFACE_RX_MODE_POLLING;
 728
 729   if (dev_class->format_device_name)
 730     hw->name = format (0, "%U", dev_class->format_device_name, dev_instance);
 731   else if (hw_class->format_interface_name)
 732     hw->name = format (0, "%U", hw_class->format_interface_name,
 733                        dev_instance);
 734   else
 735     hw->name = format (0, "%s%x", hw_class->name, dev_instance);
 736
 737   if (!im->hw_interface_by_name)
 738     im->hw_interface_by_name = hash_create_vec ( /* size */ 0,
 739                                                 sizeof (hw->name[0]),
 740                                                 sizeof (uword));
 741
 742   hash_set_mem (im->hw_interface_by_name, hw->name, hw_index);
 743
 744   /* Make hardware interface point to software interface. */
 745   {
 746     vnet_sw_interface_t sw = {
 747       .type = VNET_SW_INTERFACE_TYPE_HARDWARE,
 748       .flood_class = VNET_FLOOD_CLASS_NORMAL,
 749       .hw_if_index = hw_index
 750     };
 751     hw->sw_if_index = vnet_create_sw_interface_no_callbacks (vnm, &sw);
 752   }
 753
 754   hw->dev_class_index = dev_class_index;
 755   hw->dev_instance = dev_instance;
 756   hw->hw_class_index = hw_class_index;
 757   hw->hw_instance = hw_instance;
 758
 759   hw->max_rate_bits_per_sec = 0;
 760   hw->min_packet_bytes = 0;
 761   hw->per_packet_overhead_bytes = 0;
 762   hw->max_l3_packet_bytes[VLIB_RX] = ~0;
 763   hw->max_l3_packet_bytes[VLIB_TX] = ~0;
 764
 765   if (dev_class->tx_function == 0)
 766     goto no_output_nodes;       /* No output/tx nodes to create */
 767
 768   tx_node_name = (char *) format (0, "%v-tx", hw->name);
 769   output_node_name = (char *) format (0, "%v-output", hw->name);
 770
 771   /* If we have previously deleted interface nodes, re-use them. */
 772   if (vec_len (im->deleted_hw_interface_nodes) > 0)
 773     {
 774       vnet_hw_interface_nodes_t *hn;
 775       vlib_node_t *node;
 776       vlib_node_runtime_t *nrt;
 777
 778       hn = vec_end (im->deleted_hw_interface_nodes) - 1;
 779
 780       hw->tx_node_index = hn->tx_node_index;
 781       hw->output_node_index = hn->output_node_index;
 782
 783       vlib_node_rename (vm, hw->tx_node_index, "%v", tx_node_name);
 784       vlib_node_rename (vm, hw->output_node_index, "%v", output_node_name);
 785
 786       /* *INDENT-OFF* */
 787       foreach_vlib_main ({
 788         vnet_interface_output_runtime_t *rt;
 789
 790         rt = vlib_node_get_runtime_data (this_vlib_main, hw->output_node_index);
 791         ASSERT (rt->is_deleted == 1);
 792         rt->is_deleted = 0;
 793         rt->hw_if_index = hw_index;
 794         rt->sw_if_index = hw->sw_if_index;
 795         rt->dev_instance = hw->dev_instance;
 796
 797         rt = vlib_node_get_runtime_data (this_vlib_main, hw->tx_node_index);
 798         rt->hw_if_index = hw_index;
 799         rt->sw_if_index = hw->sw_if_index;
 800         rt->dev_instance = hw->dev_instance;
 801       });
 802       /* *INDENT-ON* */
 803
 804       /* The new class may differ from the old one.
 805        * Functions have to be updated. */
 806       node = vlib_get_node (vm, hw->output_node_index);
 807       node->function = vnet_interface_output_node_multiarch_select ();
 808       node->format_trace = format_vnet_interface_output_trace;
 809       /* *INDENT-OFF* */
 810       foreach_vlib_main ({
 811         nrt = vlib_node_get_runtime (this_vlib_main, hw->output_node_index);
 812         nrt->function = node->function;
 813       });
 814       /* *INDENT-ON* */
 815
 816       node = vlib_get_node (vm, hw->tx_node_index);
 817       node->function = dev_class->tx_function;
 818       node->format_trace = dev_class->format_tx_trace;
 819       /* *INDENT-OFF* */
 820       foreach_vlib_main ({
 821         nrt = vlib_node_get_runtime (this_vlib_main, hw->tx_node_index);
 822         nrt->function = node->function;
 823       });
 824       /* *INDENT-ON* */
 825
 826       _vec_len (im->deleted_hw_interface_nodes) -= 1;
 827     }
 828   else
 829     {
 830       vlib_node_registration_t r;
 831       vnet_interface_output_runtime_t rt = {
 832         .hw_if_index = hw_index,
 833         .sw_if_index = hw->sw_if_index,
 834         .dev_instance = hw->dev_instance,
 835         .is_deleted = 0,
 836       };
 837
 838       memset (&r, 0, sizeof (r));
 839       r.type = VLIB_NODE_TYPE_INTERNAL;
 840       r.runtime_data = &rt;
 841       r.runtime_data_bytes = sizeof (rt);
 842       r.scalar_size = 0;
 843       r.vector_size = sizeof (u32);
 844
 845       r.flags = VLIB_NODE_FLAG_IS_OUTPUT;
 846       r.name = tx_node_name;
 847       r.function = dev_class->tx_function;
 848
 849       hw->tx_node_index = vlib_register_node (vm, &r);
 850
 851       vlib_node_add_named_next_with_slot (vm, hw->tx_node_index,
 852                                           "error-drop",
 853                                           VNET_INTERFACE_TX_NEXT_DROP);
 854
 855       r.flags = 0;
 856       r.name = output_node_name;
 857       r.function = vnet_interface_output_node_multiarch_select ();
 858       r.format_trace = format_vnet_interface_output_trace;
 859
 860       {
 861         static char *e[] = {
 862           "interface is down",
 863           "interface is deleted",
 864         };
 865
 866         r.n_errors = ARRAY_LEN (e);
 867         r.error_strings = e;
 868       }
 869       hw->output_node_index = vlib_register_node (vm, &r);
 870
 871       vlib_node_add_named_next_with_slot (vm, hw->output_node_index,
 872                                           "error-drop",
 873                                           VNET_INTERFACE_OUTPUT_NEXT_DROP);
 874       vlib_node_add_next_with_slot (vm, hw->output_node_index,
 875                                     hw->tx_node_index,
 876                                     VNET_INTERFACE_OUTPUT_NEXT_TX);
 877
 878       /* add interface to the list of "output-interface" feature arc start nodes
 879          and clone nexts from 1st interface if it exists */
 880       fcm = vnet_feature_get_config_main (im->output_feature_arc_index);
 881       cm = &fcm->config_main;
 882       i = vec_len (cm->start_node_indices);
 883       vec_validate (cm->start_node_indices, i);
 884       cm->start_node_indices[i] = hw->output_node_index;
 885       if (hw_index)
 886         {
 887           /* copy nexts from 1st interface */
 888           vnet_hw_interface_t *first_hw;
 889           vlib_node_t *first_node;
 890
 891           first_hw = vnet_get_hw_interface (vnm, /* hw_if_index */ 0);
 892           first_node = vlib_get_node (vm, first_hw->output_node_index);
 893
 894           /* 1st 2 nexts are already added above */
 895           for (i = 2; i < vec_len (first_node->next_nodes); i++)
 896             vlib_node_add_next_with_slot (vm, hw->output_node_index,
 897                                           first_node->next_nodes[i], i);
 898         }
 899     }
 900
 901   setup_output_node (vm, hw->output_node_index, hw_class);
 902   setup_tx_node (vm, hw->tx_node_index, dev_class);
 903
 904 no_output_nodes:
 905   /* Call all up/down callbacks with zero flags when interface is created. */
 906   vnet_sw_interface_set_flags_helper (vnm, hw->sw_if_index, /* flags */ 0,
 907                                       VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE);
 908   vnet_hw_interface_set_flags_helper (vnm, hw_index, /* flags */ 0,
 909                                       VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE);
 910   vec_free (tx_node_name);
 911   vec_free (output_node_name);
 912
 913   return hw_index;
 914 }
 915
 916 void
 917 vnet_delete_hw_interface (vnet_main_t * vnm, u32 hw_if_index)
 918 {
 919   vnet_interface_main_t *im = &vnm->interface_main;
 920   vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
 921   vlib_main_t *vm = vnm->vlib_main;
 922   vnet_device_class_t *dev_class = vnet_get_device_class (vnm,
 923                                                           hw->dev_class_index);
 924   /* If it is up, mark it down. */
 925   if (hw->flags != 0)
 926     vnet_hw_interface_set_flags (vnm, hw_if_index, /* flags */ 0);
 927
 928   /* Call delete callbacks. */
 929   call_hw_interface_add_del_callbacks (vnm, hw_if_index, /* is_create */ 0);
 930
 931   /* Delete any sub-interfaces. */
 932   {
 933     u32 id, sw_if_index;
 934     /* *INDENT-OFF* */
 935     hash_foreach (id, sw_if_index, hw->sub_interface_sw_if_index_by_id,
 936     ({
 937       vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
 938       u64 sup_and_sub_key =
 939         ((u64) (si->sup_sw_if_index) << 32) | (u64) si->sub.id;
 940       hash_unset_mem_free (&im->sw_if_index_by_sup_and_sub, &sup_and_sub_key);
 941       vnet_delete_sw_interface (vnm, sw_if_index);
 942     }));
 943     hash_free (hw->sub_interface_sw_if_index_by_id);
 944     /* *INDENT-ON* */
 945   }
 946
 947   /* Delete software interface corresponding to hardware interface. */
 948   vnet_delete_sw_interface (vnm, hw->sw_if_index);
 949
 950   if (dev_class->tx_function)
 951     {
 952       /* Put output/tx nodes into recycle pool */
 953       vnet_hw_interface_nodes_t *dn;
 954
 955       /* *INDENT-OFF* */
 956       foreach_vlib_main
 957         ({
 958           vnet_interface_output_runtime_t *rt =
 959             vlib_node_get_runtime_data (this_vlib_main, hw->output_node_index);
 960
 961           /* Mark node runtime as deleted so output node (if called)
 962            * will drop packets. */
 963           rt->is_deleted = 1;
 964         });
 965       /* *INDENT-ON* */
 966
 967       vlib_node_rename (vm, hw->output_node_index,
 968                         "interface-%d-output-deleted", hw_if_index);
 969       vlib_node_rename (vm, hw->tx_node_index, "interface-%d-tx-deleted",
 970                         hw_if_index);
 971       vec_add2 (im->deleted_hw_interface_nodes, dn, 1);
 972       dn->tx_node_index = hw->tx_node_index;
 973       dn->output_node_index = hw->output_node_index;
 974     }
 975
 976   hash_unset_mem (im->hw_interface_by_name, hw->name);
 977   vec_free (hw->name);
 978   vec_free (hw->hw_address);
 979   vec_free (hw->input_node_thread_index_by_queue);
 980   vec_free (hw->dq_runtime_index_by_queue);
 981
 982   pool_put (im->hw_interfaces, hw);
 983 }
 984
 985 void
 986 vnet_hw_interface_walk_sw (vnet_main_t * vnm,
 987                            u32 hw_if_index,
 988                            vnet_hw_sw_interface_walk_t fn, void *ctx)
 989 {
 990   vnet_hw_interface_t *hi;
 991   u32 id, sw_if_index;
 992
 993   hi = vnet_get_hw_interface (vnm, hw_if_index);
 994   /* the super first, then the and sub interfaces */
 995   fn (vnm, hi->sw_if_index, ctx);
 996
 997   /* *INDENT-OFF* */
 998   hash_foreach (id, sw_if_index,
 999                 hi->sub_interface_sw_if_index_by_id,
1000   ({
1001     if (WALK_STOP == fn (vnm, sw_if_index, ctx))
1002       break;
1003   }));
1004   /* *INDENT-ON* */
1005 }
1006
1007 void
1008 vnet_sw_interface_walk (vnet_main_t * vnm,
1009                         vnet_sw_interface_walk_t fn, void *ctx)
1010 {
1011   vnet_interface_main_t *im;
1012   vnet_sw_interface_t *si;
1013
1014   im = &vnm->interface_main;
1015
1016   /* *INDENT-OFF* */
1017   pool_foreach (si, im->sw_interfaces,
1018   {
1019     if (WALK_STOP == fn (vnm, si, ctx))
1020       break;
1021   });
1022   /* *INDENT-ON* */
1023 }
1024
1025 static void
1026 serialize_vnet_hw_interface_set_class (serialize_main_t * m, va_list * va)
1027 {
1028   u32 hw_if_index = va_arg (*va, u32);
1029   char *hw_class_name = va_arg (*va, char *);
1030   serialize_integer (m, hw_if_index, sizeof (hw_if_index));
1031   serialize_cstring (m, hw_class_name);
1032 }
1033
1034 static void
1035 unserialize_vnet_hw_interface_set_class (serialize_main_t * m, va_list * va)
1036 {
1037   CLIB_UNUSED (mc_main_t * mc) = va_arg (*va, mc_main_t *);
1038   vnet_main_t *vnm = vnet_get_main ();
1039   u32 hw_if_index;
1040   char *hw_class_name;
1041   uword *p;
1042   clib_error_t *error;
1043
1044   unserialize_integer (m, &hw_if_index, sizeof (hw_if_index));
1045   unserialize_cstring (m, &hw_class_name);
1046   p =
1047     hash_get (vnm->interface_main.hw_interface_class_by_name, hw_class_name);
1048   ASSERT (p != 0);
1049   error = vnet_hw_interface_set_class_helper (vnm, hw_if_index, p[0],
1050                                               /* redistribute */ 0);
1051   if (error)
1052     clib_error_report (error);
1053 }
1054
1055 MC_SERIALIZE_MSG (vnet_hw_interface_set_class_msg, static) =
1056 {
1057 .name = "vnet_hw_interface_set_class",.serialize =
1058     serialize_vnet_hw_interface_set_class,.unserialize =
1059     unserialize_vnet_hw_interface_set_class,};
1060
1061 void
1062 vnet_hw_interface_init_for_class (vnet_main_t * vnm, u32 hw_if_index,
1063                                   u32 hw_class_index, u32 hw_instance)
1064 {
1065   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1066   vnet_hw_interface_class_t *hc =
1067     vnet_get_hw_interface_class (vnm, hw_class_index);
1068
1069   hi->hw_class_index = hw_class_index;
1070   hi->hw_instance = hw_instance;
1071   setup_output_node (vnm->vlib_main, hi->output_node_index, hc);
1072 }
1073
1074 static clib_error_t *
1075 vnet_hw_interface_set_class_helper (vnet_main_t * vnm, u32 hw_if_index,
1076                                     u32 hw_class_index, u32 redistribute)
1077 {
1078   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1079   vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, hi->sw_if_index);
1080   vnet_hw_interface_class_t *old_class =
1081     vnet_get_hw_interface_class (vnm, hi->hw_class_index);
1082   vnet_hw_interface_class_t *new_class =
1083     vnet_get_hw_interface_class (vnm, hw_class_index);
1084   vnet_device_class_t *dev_class =
1085     vnet_get_device_class (vnm, hi->dev_class_index);
1086   clib_error_t *error = 0;
1087
1088   /* New class equals old class?  Nothing to do. */
1089   if (hi->hw_class_index == hw_class_index)
1090     return 0;
1091
1092   /* No need (and incorrect since admin up flag may be set) to do error checking when
1093      receiving unserialize message. */
1094   if (redistribute)
1095     {
1096       if (si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
1097         return clib_error_return (0,
1098                                   "%v must be admin down to change class from %s to %s",
1099                                   hi->name, old_class->name, new_class->name);
1100
1101       /* Make sure interface supports given class. */
1102       if ((new_class->is_valid_class_for_interface
1103            && !new_class->is_valid_class_for_interface (vnm, hw_if_index,
1104                                                         hw_class_index))
1105           || (dev_class->is_valid_class_for_interface
1106               && !dev_class->is_valid_class_for_interface (vnm, hw_if_index,
1107                                                            hw_class_index)))
1108         return clib_error_return (0,
1109                                   "%v class cannot be changed from %s to %s",
1110                                   hi->name, old_class->name, new_class->name);
1111
1112       if (vnm->vlib_main->mc_main)
1113         {
1114           mc_serialize (vnm->vlib_main->mc_main,
1115                         &vnet_hw_interface_set_class_msg, hw_if_index,
1116                         new_class->name);
1117           return 0;
1118         }
1119     }
1120
1121   if (old_class->hw_class_change)
1122     old_class->hw_class_change (vnm, hw_if_index, old_class->index,
1123                                 new_class->index);
1124
1125   vnet_hw_interface_init_for_class (vnm, hw_if_index, new_class->index,
1126                                     /* instance */ ~0);
1127
1128   if (new_class->hw_class_change)
1129     new_class->hw_class_change (vnm, hw_if_index, old_class->index,
1130                                 new_class->index);
1131
1132   if (dev_class->hw_class_change)
1133     dev_class->hw_class_change (vnm, hw_if_index, new_class->index);
1134
1135   return error;
1136 }
1137
1138 clib_error_t *
1139 vnet_hw_interface_set_class (vnet_main_t * vnm, u32 hw_if_index,
1140                              u32 hw_class_index)
1141 {
1142   return vnet_hw_interface_set_class_helper (vnm, hw_if_index, hw_class_index,
1143                                              /* redistribute */ 1);
1144 }
1145
1146 static int
1147 vnet_hw_interface_rx_redirect_to_node_helper (vnet_main_t * vnm,
1148                                               u32 hw_if_index,
1149                                               u32 node_index,
1150                                               u32 redistribute)
1151 {
1152   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1153   vnet_device_class_t *dev_class = vnet_get_device_class
1154     (vnm, hi->dev_class_index);
1155
1156   if (redistribute)
1157     {
1158       /* $$$$ fixme someday maybe */
1159       ASSERT (vnm->vlib_main->mc_main == 0);
1160     }
1161   if (dev_class->rx_redirect_to_node)
1162     {
1163       dev_class->rx_redirect_to_node (vnm, hw_if_index, node_index);
1164       return 0;
1165     }
1166
1167   return VNET_API_ERROR_UNIMPLEMENTED;
1168 }
1169
1170 int
1171 vnet_hw_interface_rx_redirect_to_node (vnet_main_t * vnm, u32 hw_if_index,
1172                                        u32 node_index)
1173 {
1174   return vnet_hw_interface_rx_redirect_to_node_helper (vnm, hw_if_index,
1175                                                        node_index,
1176                                                        1 /* redistribute */ );
1177 }
1178
1179 word
1180 vnet_sw_interface_compare (vnet_main_t * vnm,
1181                            uword sw_if_index0, uword sw_if_index1)
1182 {
1183   vnet_sw_interface_t *sup0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1184   vnet_sw_interface_t *sup1 = vnet_get_sup_sw_interface (vnm, sw_if_index1);
1185   vnet_hw_interface_t *h0 = vnet_get_hw_interface (vnm, sup0->hw_if_index);
1186   vnet_hw_interface_t *h1 = vnet_get_hw_interface (vnm, sup1->hw_if_index);
1187
1188   if (h0 != h1)
1189     return vec_cmp (h0->name, h1->name);
1190   return (word) h0->hw_instance - (word) h1->hw_instance;
1191 }
1192
1193 word
1194 vnet_hw_interface_compare (vnet_main_t * vnm,
1195                            uword hw_if_index0, uword hw_if_index1)
1196 {
1197   vnet_hw_interface_t *h0 = vnet_get_hw_interface (vnm, hw_if_index0);
1198   vnet_hw_interface_t *h1 = vnet_get_hw_interface (vnm, hw_if_index1);
1199
1200   if (h0 != h1)
1201     return vec_cmp (h0->name, h1->name);
1202   return (word) h0->hw_instance - (word) h1->hw_instance;
1203 }
1204
1205 int
1206 vnet_sw_interface_is_p2p (vnet_main_t * vnm, u32 sw_if_index)
1207 {
1208   vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
1209   if (si->type == VNET_SW_INTERFACE_TYPE_P2P)
1210     return 1;
1211
1212   vnet_hw_interface_t *hw = vnet_get_sup_hw_interface (vnm, sw_if_index);
1213   vnet_hw_interface_class_t *hc =
1214     vnet_get_hw_interface_class (vnm, hw->hw_class_index);
1215
1216   return (hc->flags & VNET_HW_INTERFACE_CLASS_FLAG_P2P);
1217 }
1218
1219 clib_error_t *
1220 vnet_interface_init (vlib_main_t * vm)
1221 {
1222   vnet_main_t *vnm = vnet_get_main ();
1223   vnet_interface_main_t *im = &vnm->interface_main;
1224   vlib_buffer_t *b = 0;
1225   vnet_buffer_opaque_t *o = 0;
1226   clib_error_t *error;
1227
1228   /*
1229    * Keep people from shooting themselves in the foot.
1230    */
1231   if (sizeof (b->opaque) != sizeof (vnet_buffer_opaque_t))
1232     {
1233 #define _(a) if (sizeof(o->a) > sizeof (o->unused))                     \
1234       clib_warning                                                      \
1235         ("FATAL: size of opaque union subtype %s is %d (max %d)",       \
1236          #a, sizeof(o->a), sizeof (o->unused));
1237       foreach_buffer_opaque_union_subtype;
1238 #undef _
1239
1240       return clib_error_return
1241         (0, "FATAL: size of vlib buffer opaque %d, size of vnet opaque %d",
1242          sizeof (b->opaque), sizeof (vnet_buffer_opaque_t));
1243     }
1244
1245   im->sw_if_counter_lock = clib_mem_alloc_aligned (CLIB_CACHE_LINE_BYTES,
1246                                                    CLIB_CACHE_LINE_BYTES);
1247   im->sw_if_counter_lock[0] = 1;        /* should be no need */
1248
1249   vec_validate (im->sw_if_counters, VNET_N_SIMPLE_INTERFACE_COUNTER - 1);
1250   im->sw_if_counters[VNET_INTERFACE_COUNTER_DROP].name = "drops";
1251   im->sw_if_counters[VNET_INTERFACE_COUNTER_PUNT].name = "punts";
1252   im->sw_if_counters[VNET_INTERFACE_COUNTER_IP4].name = "ip4";
1253   im->sw_if_counters[VNET_INTERFACE_COUNTER_IP6].name = "ip6";
1254   im->sw_if_counters[VNET_INTERFACE_COUNTER_RX_NO_BUF].name = "rx-no-buf";
1255   im->sw_if_counters[VNET_INTERFACE_COUNTER_RX_MISS].name = "rx-miss";
1256   im->sw_if_counters[VNET_INTERFACE_COUNTER_RX_ERROR].name = "rx-error";
1257   im->sw_if_counters[VNET_INTERFACE_COUNTER_TX_ERROR].name = "tx-error";
1258
1259   vec_validate (im->combined_sw_if_counters,
1260                 VNET_N_COMBINED_INTERFACE_COUNTER - 1);
1261   im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_RX].name = "rx";
1262   im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_RX_UNICAST].name =
1263     "rx-unicast";
1264   im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_RX_MULTICAST].name =
1265     "rx-multicast";
1266   im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_RX_BROADCAST].name =
1267     "rx-broadcast";
1268   im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_TX].name = "tx";
1269   im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_TX_UNICAST].name =
1270     "tx-unicast";
1271   im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_TX_MULTICAST].name =
1272     "tx-multicast";
1273   im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_TX_BROADCAST].name =
1274     "tx-broadcast";
1275
1276   im->sw_if_counter_lock[0] = 0;
1277
1278   im->device_class_by_name = hash_create_string ( /* size */ 0,
1279                                                  sizeof (uword));
1280   {
1281     vnet_device_class_t *c;
1282
1283     c = vnm->device_class_registrations;
1284
1285     while (c)
1286       {
1287         c->index = vec_len (im->device_classes);
1288         hash_set_mem (im->device_class_by_name, c->name, c->index);
1289         vec_add1 (im->device_classes, c[0]);
1290         c = c->next_class_registration;
1291       }
1292   }
1293
1294   im->hw_interface_class_by_name = hash_create_string ( /* size */ 0,
1295                                                        sizeof (uword));
1296
1297   im->sw_if_index_by_sup_and_sub = hash_create_mem (0, sizeof (u64),
1298                                                     sizeof (uword));
1299   {
1300     vnet_hw_interface_class_t *c;
1301
1302     c = vnm->hw_interface_class_registrations;
1303
1304     while (c)
1305       {
1306         c->index = vec_len (im->hw_interface_classes);
1307         hash_set_mem (im->hw_interface_class_by_name, c->name, c->index);
1308
1309         if (NULL == c->build_rewrite)
1310           c->build_rewrite = default_build_rewrite;
1311         if (NULL == c->update_adjacency)
1312           c->update_adjacency = default_update_adjacency;
1313
1314         vec_add1 (im->hw_interface_classes, c[0]);
1315         c = c->next_class_registration;
1316       }
1317   }
1318
1319   if ((error = vlib_call_init_function (vm, vnet_interface_cli_init)))
1320     return error;
1321
1322   vnm->interface_tag_by_sw_if_index = hash_create (0, sizeof (uword));
1323
1324 #if VLIB_BUFFER_TRACE_TRAJECTORY > 0
1325   if ((error = vlib_call_init_function (vm, trajectory_trace_init)))
1326     return error;
1327 #endif
1328
1329   return 0;
1330 }
1331
1332 VLIB_INIT_FUNCTION (vnet_interface_init);
1333
1334 /* Kludge to renumber interface names [only!] */
1335 int
1336 vnet_interface_name_renumber (u32 sw_if_index, u32 new_show_dev_instance)
1337 {
1338   int rv;
1339   vnet_main_t *vnm = vnet_get_main ();
1340   vnet_interface_main_t *im = &vnm->interface_main;
1341   vnet_hw_interface_t *hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
1342
1343   vnet_device_class_t *dev_class = vnet_get_device_class
1344     (vnm, hi->dev_class_index);
1345
1346   if (dev_class->name_renumber == 0 || dev_class->format_device_name == 0)
1347     return VNET_API_ERROR_UNIMPLEMENTED;
1348
1349   rv = dev_class->name_renumber (hi, new_show_dev_instance);
1350
1351   if (rv)
1352     return rv;
1353
1354   hash_unset_mem (im->hw_interface_by_name, hi->name);
1355   vec_free (hi->name);
1356   /* Use the mapping we set up to call it Ishmael */
1357   hi->name = format (0, "%U", dev_class->format_device_name,
1358                      hi->dev_instance);
1359
1360   hash_set_mem (im->hw_interface_by_name, hi->name, hi->hw_if_index);
1361   return rv;
1362 }
1363
1364 clib_error_t *
1365 vnet_rename_interface (vnet_main_t * vnm, u32 hw_if_index, char *new_name)
1366 {
1367   vnet_interface_main_t *im = &vnm->interface_main;
1368   vlib_main_t *vm = vnm->vlib_main;
1369   vnet_hw_interface_t *hw;
1370   u8 *old_name;
1371   clib_error_t *error = 0;
1372
1373   hw = vnet_get_hw_interface (vnm, hw_if_index);
1374   if (!hw)
1375     {
1376       return clib_error_return (0,
1377                                 "unable to find hw interface for index %u",
1378                                 hw_if_index);
1379     }
1380
1381   old_name = hw->name;
1382
1383   /* set new hw->name */
1384   hw->name = format (0, "%s", new_name);
1385
1386   /* remove the old name to hw_if_index mapping and install the new one */
1387   hash_unset_mem (im->hw_interface_by_name, old_name);
1388   hash_set_mem (im->hw_interface_by_name, hw->name, hw_if_index);
1389
1390   /* rename tx/output nodes */
1391   vlib_node_rename (vm, hw->tx_node_index, "%v-tx", hw->name);
1392   vlib_node_rename (vm, hw->output_node_index, "%v-output", hw->name);
1393
1394   /* free the old name vector */
1395   vec_free (old_name);
1396
1397   return error;
1398 }
1399
1400 static clib_error_t *
1401 vnet_hw_interface_change_mac_address_helper (vnet_main_t * vnm,
1402                                              u32 hw_if_index,
1403                                              u8 * mac_address)
1404 {
1405   clib_error_t *error = 0;
1406   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1407
1408   if (hi->hw_address)
1409     {
1410       vnet_device_class_t *dev_class =
1411         vnet_get_device_class (vnm, hi->dev_class_index);
1412       if (dev_class->mac_addr_change_function)
1413         {
1414           error =
1415             dev_class->mac_addr_change_function (hi, (char *) mac_address);
1416         }
1417       if (!error)
1418         {
1419           vnet_hw_interface_class_t *hw_class;
1420
1421           hw_class = vnet_get_hw_interface_class (vnm, hi->hw_class_index);
1422
1423           if (NULL != hw_class->mac_addr_change_function)
1424             hw_class->mac_addr_change_function (hi, (char *) mac_address);
1425         }
1426       else
1427         {
1428           error =
1429             clib_error_return (0,
1430                                "MAC Address Change is not supported on this interface");
1431         }
1432     }
1433   else
1434     {
1435       error =
1436         clib_error_return (0,
1437                            "mac address change is not supported for interface index %u",
1438                            hw_if_index);
1439     }
1440   return error;
1441 }
1442
1443 clib_error_t *
1444 vnet_hw_interface_change_mac_address (vnet_main_t * vnm, u32 hw_if_index,
1445                                       u8 * mac_address)
1446 {
1447   return vnet_hw_interface_change_mac_address_helper
1448     (vnm, hw_if_index, mac_address);
1449 }
1450
1451 /* update the unnumbered state of an interface*/
1452 void
1453 vnet_sw_interface_update_unnumbered (u32 unnumbered_sw_if_index,
1454                                      u32 ip_sw_if_index, u8 enable)
1455 {
1456   vnet_main_t *vnm = vnet_get_main ();
1457   vnet_sw_interface_t *si;
1458   u32 was_unnum;
1459
1460   si = vnet_get_sw_interface (vnm, unnumbered_sw_if_index);
1461   was_unnum = (si->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED);
1462
1463   if (enable)
1464     {
1465       si->flags |= VNET_SW_INTERFACE_FLAG_UNNUMBERED;
1466       si->unnumbered_sw_if_index = ip_sw_if_index;
1467
1468       ip4_main.lookup_main.if_address_pool_index_by_sw_if_index
1469         [unnumbered_sw_if_index] =
1470         ip4_main.
1471         lookup_main.if_address_pool_index_by_sw_if_index[ip_sw_if_index];
1472       ip6_main.
1473         lookup_main.if_address_pool_index_by_sw_if_index
1474         [unnumbered_sw_if_index] =
1475         ip6_main.
1476         lookup_main.if_address_pool_index_by_sw_if_index[ip_sw_if_index];
1477     }
1478   else
1479     {
1480       si->flags &= ~(VNET_SW_INTERFACE_FLAG_UNNUMBERED);
1481       si->unnumbered_sw_if_index = (u32) ~ 0;
1482
1483       ip4_main.lookup_main.if_address_pool_index_by_sw_if_index
1484         [unnumbered_sw_if_index] = ~0;
1485       ip6_main.lookup_main.if_address_pool_index_by_sw_if_index
1486         [unnumbered_sw_if_index] = ~0;
1487     }
1488
1489   if (was_unnum != (si->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED))
1490     {
1491       ip4_sw_interface_enable_disable (unnumbered_sw_if_index, enable);
1492       ip6_sw_interface_enable_disable (unnumbered_sw_if_index, enable);
1493     }
1494 }
1495
1496 vnet_l3_packet_type_t
1497 vnet_link_to_l3_proto (vnet_link_t link)
1498 {
1499   switch (link)
1500     {
1501     case VNET_LINK_IP4:
1502       return (VNET_L3_PACKET_TYPE_IP4);
1503     case VNET_LINK_IP6:
1504       return (VNET_L3_PACKET_TYPE_IP6);
1505     case VNET_LINK_MPLS:
1506       return (VNET_L3_PACKET_TYPE_MPLS);
1507     case VNET_LINK_ARP:
1508       return (VNET_L3_PACKET_TYPE_ARP);
1509     case VNET_LINK_ETHERNET:
1510     case VNET_LINK_NSH:
1511       ASSERT (0);
1512       break;
1513     }
1514   ASSERT (0);
1515   return (0);
1516 }
1517
1518 u8 *
1519 default_build_rewrite (vnet_main_t * vnm,
1520                        u32 sw_if_index,
1521                        vnet_link_t link_type, const void *dst_address)
1522 {
1523   return (NULL);
1524 }
1525
1526 void
1527 default_update_adjacency (vnet_main_t * vnm, u32 sw_if_index, u32 ai)
1528 {
1529   ip_adjacency_t *adj;
1530
1531   adj = adj_get (ai);
1532
1533   switch (adj->lookup_next_index)
1534     {
1535     case IP_LOOKUP_NEXT_GLEAN:
1536       adj_glean_update_rewrite (ai);
1537       break;
1538     case IP_LOOKUP_NEXT_ARP:
1539       /*
1540        * default rewirte in neighbour adj
1541        */
1542       adj_nbr_update_rewrite
1543         (ai,
1544          ADJ_NBR_REWRITE_FLAG_COMPLETE,
1545          vnet_build_rewrite_for_sw_interface (vnm,
1546                                               sw_if_index,
1547                                               adj_get_link_type (ai), NULL));
1548       break;
1549     case IP_LOOKUP_NEXT_MCAST:
1550       /*
1551        * mcast traffic also uses default rewrite string with no mcast
1552        * switch time updates.
1553        */
1554       adj_mcast_update_rewrite
1555         (ai,
1556          vnet_build_rewrite_for_sw_interface (vnm,
1557                                               sw_if_index,
1558                                               adj_get_link_type (ai),
1559                                               NULL), 0);
1560       break;
1561     case IP_LOOKUP_NEXT_DROP:
1562     case IP_LOOKUP_NEXT_PUNT:
1563     case IP_LOOKUP_NEXT_LOCAL:
1564     case IP_LOOKUP_NEXT_REWRITE:
1565     case IP_LOOKUP_NEXT_MCAST_MIDCHAIN:
1566     case IP_LOOKUP_NEXT_MIDCHAIN:
1567     case IP_LOOKUP_NEXT_ICMP_ERROR:
1568     case IP_LOOKUP_N_NEXT:
1569       ASSERT (0);
1570       break;
1571     }
1572 }
1573
1574 int collect_detailed_interface_stats_flag = 0;
1575
1576 void
1577 collect_detailed_interface_stats_flag_set (void)
1578 {
1579   collect_detailed_interface_stats_flag = 1;
1580 }
1581
1582 void
1583 collect_detailed_interface_stats_flag_clear (void)
1584 {
1585   collect_detailed_interface_stats_flag = 0;
1586 }
1587
1588 static clib_error_t *
1589 collect_detailed_interface_stats_cli (vlib_main_t * vm,
1590                                       unformat_input_t * input,
1591                                       vlib_cli_command_t * cmd)
1592 {
1593   unformat_input_t _line_input, *line_input = &_line_input;
1594   clib_error_t *error = NULL;
1595
1596   /* Get a line of input. */
1597   if (!unformat_user (input, unformat_line_input, line_input))
1598     return clib_error_return (0, "expected enable | disable");
1599
1600   while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
1601     {
1602       if (unformat (line_input, "enable") || unformat (line_input, "on"))
1603         collect_detailed_interface_stats_flag_set ();
1604       else if (unformat (line_input, "disable")
1605                || unformat (line_input, "off"))
1606         collect_detailed_interface_stats_flag_clear ();
1607       else
1608         {
1609           error = clib_error_return (0, "unknown input `%U'",
1610                                      format_unformat_error, line_input);
1611           goto done;
1612         }
1613     }
1614
1615 done:
1616   unformat_free (line_input);
1617   return error;
1618 }
1619
1620 /* *INDENT-OFF* */
1621 VLIB_CLI_COMMAND (collect_detailed_interface_stats_command, static) = {
1622   .path = "interface collect detailed-stats",
1623   .short_help = "interface collect detailed-stats <enable|disable>",
1624   .function = collect_detailed_interface_stats_cli,
1625 };
1626 /* *INDENT-ON* */
1627
1628 /*
1629  * fd.io coding-style-patch-verification: ON
1630  *
1631  * Local Variables:
1632  * eval: (c-set-style "gnu")
1633  * End:
1634  */