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 typedef enum vnet_interface_helper_flags_t_
  47 {
  48   VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE = (1 << 0),
  49   VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE = (1 << 1),
  50 } vnet_interface_helper_flags_t;
  51
  52 static clib_error_t *vnet_hw_interface_set_flags_helper (vnet_main_t * vnm,
  53                                                          u32 hw_if_index,
  54                                                          vnet_hw_interface_flags_t
  55                                                          flags,
  56                                                          vnet_interface_helper_flags_t
  57                                                          helper_flags);
  58
  59 static clib_error_t *vnet_sw_interface_set_flags_helper (vnet_main_t * vnm,
  60                                                          u32 sw_if_index,
  61                                                          vnet_sw_interface_flags_t
  62                                                          flags,
  63                                                          vnet_interface_helper_flags_t
  64                                                          helper_flags);
  65
  66 static clib_error_t *vnet_hw_interface_set_class_helper (vnet_main_t * vnm,
  67                                                          u32 hw_if_index,
  68                                                          u32 hw_class_index,
  69                                                          u32 redistribute);
  70
  71 typedef struct
  72 {
  73   /* Either sw or hw interface index. */
  74   u32 sw_hw_if_index;
  75
  76   /* Flags. */
  77   u32 flags;
  78 } vnet_sw_hw_interface_state_t;
  79
  80 static void
  81 serialize_vec_vnet_sw_hw_interface_state (serialize_main_t * m, va_list * va)
  82 {
  83   vnet_sw_hw_interface_state_t *s =
  84     va_arg (*va, vnet_sw_hw_interface_state_t *);
  85   u32 n = va_arg (*va, u32);
  86   u32 i;
  87   for (i = 0; i < n; i++)
  88     {
  89       serialize_integer (m, s[i].sw_hw_if_index,
  90                          sizeof (s[i].sw_hw_if_index));
  91       serialize_integer (m, s[i].flags, sizeof (s[i].flags));
  92     }
  93 }
  94
  95 static void
  96 unserialize_vec_vnet_sw_hw_interface_state (serialize_main_t * m,
  97                                             va_list * va)
  98 {
  99   vnet_sw_hw_interface_state_t *s =
 100     va_arg (*va, vnet_sw_hw_interface_state_t *);
 101   u32 n = va_arg (*va, u32);
 102   u32 i;
 103   for (i = 0; i < n; i++)
 104     {
 105       unserialize_integer (m, &s[i].sw_hw_if_index,
 106                            sizeof (s[i].sw_hw_if_index));
 107       unserialize_integer (m, &s[i].flags, sizeof (s[i].flags));
 108     }
 109 }
 110
 111 static vnet_sw_interface_flags_t
 112 vnet_hw_interface_flags_to_sw (vnet_hw_interface_flags_t hwf)
 113 {
 114   vnet_sw_interface_flags_t swf = VNET_SW_INTERFACE_FLAG_NONE;
 115
 116   if (hwf & VNET_HW_INTERFACE_FLAG_LINK_UP)
 117     swf |= VNET_SW_INTERFACE_FLAG_ADMIN_UP;
 118
 119   return (swf);
 120 }
 121
 122 void
 123 serialize_vnet_interface_state (serialize_main_t * m, va_list * va)
 124 {
 125   vnet_main_t *vnm = va_arg (*va, vnet_main_t *);
 126   vnet_sw_hw_interface_state_t *sts = 0, *st;
 127   vnet_sw_interface_t *sif;
 128   vnet_hw_interface_t *hif;
 129   vnet_interface_main_t *im = &vnm->interface_main;
 130
 131   /* Serialize hardware interface classes since they may have changed.
 132      Must do this before sending up/down flags. */
 133   /* *INDENT-OFF* */
 134   pool_foreach (hif, im->hw_interfaces, ({
 135     vnet_hw_interface_class_t * hw_class = vnet_get_hw_interface_class (vnm, hif->hw_class_index);
 136     serialize_cstring (m, hw_class->name);
 137   }));
 138   /* *INDENT-ON* */
 139
 140   /* Send sw/hw interface state when non-zero. */
 141   /* *INDENT-OFF* */
 142   pool_foreach (sif, im->sw_interfaces, ({
 143     if (sif->flags != 0)
 144       {
 145         vec_add2 (sts, st, 1);
 146         st->sw_hw_if_index = sif->sw_if_index;
 147         st->flags = sif->flags;
 148       }
 149   }));
 150   /* *INDENT-ON* */
 151
 152   vec_serialize (m, sts, serialize_vec_vnet_sw_hw_interface_state);
 153
 154   if (sts)
 155     _vec_len (sts) = 0;
 156
 157   /* *INDENT-OFF* */
 158   pool_foreach (hif, im->hw_interfaces, ({
 159     if (hif->flags != 0)
 160       {
 161         vec_add2 (sts, st, 1);
 162         st->sw_hw_if_index = hif->hw_if_index;
 163         st->flags = vnet_hw_interface_flags_to_sw(hif->flags);
 164       }
 165   }));
 166   /* *INDENT-ON* */
 167
 168   vec_serialize (m, sts, serialize_vec_vnet_sw_hw_interface_state);
 169
 170   vec_free (sts);
 171 }
 172
 173 static vnet_hw_interface_flags_t
 174 vnet_sw_interface_flags_to_hw (vnet_sw_interface_flags_t swf)
 175 {
 176   vnet_hw_interface_flags_t hwf = VNET_HW_INTERFACE_FLAG_NONE;
 177
 178   if (swf & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
 179     hwf |= VNET_HW_INTERFACE_FLAG_LINK_UP;
 180
 181   return (hwf);
 182 }
 183
 184 void
 185 unserialize_vnet_interface_state (serialize_main_t * m, va_list * va)
 186 {
 187   vnet_main_t *vnm = va_arg (*va, vnet_main_t *);
 188   vnet_sw_hw_interface_state_t *sts = 0, *st;
 189
 190   /* First set interface hardware class. */
 191   {
 192     vnet_interface_main_t *im = &vnm->interface_main;
 193     vnet_hw_interface_t *hif;
 194     char *class_name;
 195     uword *p;
 196     clib_error_t *error;
 197
 198     /* *INDENT-OFF* */
 199     pool_foreach (hif, im->hw_interfaces, ({
 200       unserialize_cstring (m, &class_name);
 201       p = hash_get_mem (im->hw_interface_class_by_name, class_name);
 202       if (p)
 203         {
 204           error = vnet_hw_interface_set_class_helper
 205             (vnm, hif->hw_if_index, p[0], /* redistribute */ 0);
 206         }
 207       else
 208         error = clib_error_return (0, "hw class %s AWOL?", class_name);
 209
 210       if (error)
 211         clib_error_report (error);
 212       vec_free (class_name);
 213     }));
 214     /* *INDENT-ON* */
 215   }
 216
 217   vec_unserialize (m, &sts, unserialize_vec_vnet_sw_hw_interface_state);
 218   vec_foreach (st, sts)
 219     vnet_sw_interface_set_flags_helper (vnm, st->sw_hw_if_index, st->flags,
 220                                         /* no distribute */ 0);
 221   vec_free (sts);
 222
 223   vec_unserialize (m, &sts, unserialize_vec_vnet_sw_hw_interface_state);
 224   vec_foreach (st, sts)
 225   {
 226     vnet_hw_interface_set_flags_helper
 227       (vnm, st->sw_hw_if_index, vnet_sw_interface_flags_to_hw (st->flags),
 228        /* no distribute */ 0);
 229   }
 230   vec_free (sts);
 231 }
 232
 233 static clib_error_t *
 234 call_elf_section_interface_callbacks (vnet_main_t * vnm, u32 if_index,
 235                                       u32 flags,
 236                                       _vnet_interface_function_list_elt_t **
 237                                       elts)
 238 {
 239   _vnet_interface_function_list_elt_t *elt;
 240   vnet_interface_function_priority_t prio;
 241   clib_error_t *error = 0;
 242
 243   for (prio = VNET_ITF_FUNC_PRIORITY_LOW;
 244        prio <= VNET_ITF_FUNC_PRIORITY_HIGH; prio++)
 245     {
 246       elt = elts[prio];
 247
 248       while (elt)
 249         {
 250           error = elt->fp (vnm, if_index, flags);
 251           if (error)
 252             return error;
 253           elt = elt->next_interface_function;
 254         }
 255     }
 256   return error;
 257 }
 258
 259 static clib_error_t *
 260 call_hw_interface_add_del_callbacks (vnet_main_t * vnm, u32 hw_if_index,
 261                                      u32 is_create)
 262 {
 263   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
 264   vnet_hw_interface_class_t *hw_class =
 265     vnet_get_hw_interface_class (vnm, hi->hw_class_index);
 266   vnet_device_class_t *dev_class =
 267     vnet_get_device_class (vnm, hi->dev_class_index);
 268   clib_error_t *error = 0;
 269
 270   if (hw_class->interface_add_del_function
 271       && (error =
 272           hw_class->interface_add_del_function (vnm, hw_if_index, is_create)))
 273     return error;
 274
 275   if (dev_class->interface_add_del_function
 276       && (error =
 277           dev_class->interface_add_del_function (vnm, hw_if_index,
 278                                                  is_create)))
 279     return error;
 280
 281   error = call_elf_section_interface_callbacks
 282     (vnm, hw_if_index, is_create, vnm->hw_interface_add_del_functions);
 283
 284   return error;
 285 }
 286
 287 static clib_error_t *
 288 call_sw_interface_add_del_callbacks (vnet_main_t * vnm, u32 sw_if_index,
 289                                      u32 is_create)
 290 {
 291   return call_elf_section_interface_callbacks
 292     (vnm, sw_if_index, is_create, vnm->sw_interface_add_del_functions);
 293 }
 294
 295 static clib_error_t *
 296 vnet_hw_interface_set_flags_helper (vnet_main_t * vnm, u32 hw_if_index,
 297                                     vnet_hw_interface_flags_t flags,
 298                                     vnet_interface_helper_flags_t
 299                                     helper_flags)
 300 {
 301   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
 302   vnet_hw_interface_class_t *hw_class =
 303     vnet_get_hw_interface_class (vnm, hi->hw_class_index);
 304   u32 mask;
 305   clib_error_t *error = 0;
 306   u32 is_create =
 307     (helper_flags & VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE) != 0;
 308
 309   mask =
 310     (VNET_HW_INTERFACE_FLAG_LINK_UP | VNET_HW_INTERFACE_FLAG_DUPLEX_MASK);
 311   flags &= mask;
 312
 313   /* Call hardware interface add/del callbacks. */
 314   if (is_create)
 315     call_hw_interface_add_del_callbacks (vnm, hw_if_index, is_create);
 316
 317   /* Already in the desired state? */
 318   if (!is_create && (hi->flags & mask) == flags)
 319     goto done;
 320
 321   if ((hi->flags & VNET_HW_INTERFACE_FLAG_LINK_UP) !=
 322       (flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
 323     {
 324       /* Do hardware class (e.g. ethernet). */
 325       if (hw_class->link_up_down_function
 326           && (error = hw_class->link_up_down_function (vnm, hw_if_index,
 327                                                        flags)))
 328         goto done;
 329
 330       error = call_elf_section_interface_callbacks
 331         (vnm, hw_if_index, flags, vnm->hw_interface_link_up_down_functions);
 332
 333       if (error)
 334         goto done;
 335     }
 336
 337   hi->flags &= ~mask;
 338   hi->flags |= flags;
 339
 340 done:
 341   return error;
 342 }
 343
 344 static clib_error_t *
 345 vnet_sw_interface_set_flags_helper (vnet_main_t * vnm, u32 sw_if_index,
 346                                     vnet_sw_interface_flags_t flags,
 347                                     vnet_interface_helper_flags_t
 348                                     helper_flags)
 349 {
 350   vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
 351   u32 mask;
 352   clib_error_t *error = 0;
 353   u32 is_create =
 354     (helper_flags & VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE) != 0;
 355   u32 old_flags;
 356
 357   mask = VNET_SW_INTERFACE_FLAG_ADMIN_UP | VNET_SW_INTERFACE_FLAG_PUNT;
 358   flags &= mask;
 359
 360   if (is_create)
 361     {
 362       error =
 363         call_sw_interface_add_del_callbacks (vnm, sw_if_index, is_create);
 364       if (error)
 365         goto done;
 366
 367       if (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
 368         {
 369           /* Notify everyone when the interface is created as admin up */
 370           error = call_elf_section_interface_callbacks (vnm, sw_if_index,
 371                                                         flags,
 372                                                         vnm->
 373                                                         sw_interface_admin_up_down_functions);
 374           if (error)
 375             goto done;
 376         }
 377     }
 378   else
 379     {
 380       vnet_sw_interface_t *si_sup = si;
 381
 382       /* Check that super interface is in correct state. */
 383       if (si->type == VNET_SW_INTERFACE_TYPE_SUB)
 384         {
 385           si_sup = vnet_get_sw_interface (vnm, si->sup_sw_if_index);
 386
 387           /* Check to see if we're bringing down the soft interface and if it's parent is up */
 388           if ((flags != (si_sup->flags & mask)) &&
 389               (!((flags == 0)
 390                  && ((si_sup->flags & mask) ==
 391                      VNET_SW_INTERFACE_FLAG_ADMIN_UP))))
 392             {
 393               error = clib_error_return (0, "super-interface %U must be %U",
 394                                          format_vnet_sw_interface_name, vnm,
 395                                          si_sup,
 396                                          format_vnet_sw_interface_flags,
 397                                          flags);
 398               goto done;
 399             }
 400         }
 401
 402       /* Already in the desired state? */
 403       if ((si->flags & mask) == flags)
 404         goto done;
 405
 406       /* Sub-interfaces of hardware interfaces that do no redistribute,
 407          do not redistribute themselves. */
 408       if (si_sup->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
 409         {
 410           vnet_hw_interface_t *hi =
 411             vnet_get_hw_interface (vnm, si_sup->hw_if_index);
 412           vnet_device_class_t *dev_class =
 413             vnet_get_device_class (vnm, hi->dev_class_index);
 414           if (!dev_class->redistribute)
 415             helper_flags &=
 416               ~VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE;
 417         }
 418
 419       /* set the flags now before invoking the registered clients
 420        * so that the state they query is consistent with the state here notified */
 421       old_flags = si->flags;
 422       si->flags &= ~mask;
 423       si->flags |= flags;
 424       if ((flags | old_flags) & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
 425         error = call_elf_section_interface_callbacks
 426           (vnm, sw_if_index, flags,
 427            vnm->sw_interface_admin_up_down_functions);
 428
 429       if (error)
 430         {
 431           /* restore flags on error */
 432           si->flags = old_flags;
 433           goto done;
 434         }
 435
 436       if (si->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
 437         {
 438           vnet_hw_interface_t *hi =
 439             vnet_get_hw_interface (vnm, si->hw_if_index);
 440           vnet_hw_interface_class_t *hw_class =
 441             vnet_get_hw_interface_class (vnm, hi->hw_class_index);
 442           vnet_device_class_t *dev_class =
 443             vnet_get_device_class (vnm, hi->dev_class_index);
 444
 445           if ((flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) &&
 446               (si->flags & VNET_SW_INTERFACE_FLAG_ERROR))
 447             {
 448               error = clib_error_return (0, "Interface in the error state");
 449               goto done;
 450             }
 451
 452           /* save the si admin up flag */
 453           old_flags = si->flags;
 454
 455           /* update si admin up flag in advance if we are going admin down */
 456           if (!(flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
 457             si->flags &= ~VNET_SW_INTERFACE_FLAG_ADMIN_UP;
 458
 459           if (dev_class->admin_up_down_function
 460               && (error = dev_class->admin_up_down_function (vnm,
 461                                                              si->hw_if_index,
 462                                                              flags)))
 463             {
 464               /* restore si admin up flag to it's original state on errors */
 465               si->flags = old_flags;
 466               goto done;
 467             }
 468
 469           if (hw_class->admin_up_down_function
 470               && (error = hw_class->admin_up_down_function (vnm,
 471                                                             si->hw_if_index,
 472                                                             flags)))
 473             {
 474               /* restore si admin up flag to it's original state on errors */
 475               si->flags = old_flags;
 476               goto done;
 477             }
 478
 479           /* Admin down implies link down. */
 480           if (!(flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
 481               && (hi->flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
 482             vnet_hw_interface_set_flags_helper (vnm, si->hw_if_index,
 483                                                 hi->flags &
 484                                                 ~VNET_HW_INTERFACE_FLAG_LINK_UP,
 485                                                 helper_flags);
 486         }
 487     }
 488
 489   si->flags &= ~mask;
 490   si->flags |= flags;
 491
 492 done:
 493   return error;
 494 }
 495
 496 clib_error_t *
 497 vnet_hw_interface_set_flags (vnet_main_t * vnm, u32 hw_if_index,
 498                              vnet_hw_interface_flags_t flags)
 499 {
 500   return vnet_hw_interface_set_flags_helper
 501     (vnm, hw_if_index, flags,
 502      VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE);
 503 }
 504
 505 clib_error_t *
 506 vnet_sw_interface_set_flags (vnet_main_t * vnm, u32 sw_if_index,
 507                              vnet_sw_interface_flags_t flags)
 508 {
 509   return vnet_sw_interface_set_flags_helper
 510     (vnm, sw_if_index, flags,
 511      VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE);
 512 }
 513
 514 void
 515 vnet_sw_interface_admin_up (vnet_main_t * vnm, u32 sw_if_index)
 516 {
 517   u32 flags = vnet_sw_interface_get_flags (vnm, sw_if_index);
 518
 519   if (!(flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
 520     {
 521       flags |= VNET_SW_INTERFACE_FLAG_ADMIN_UP;
 522       vnet_sw_interface_set_flags (vnm, sw_if_index, flags);
 523     }
 524 }
 525
 526 void
 527 vnet_sw_interface_admin_down (vnet_main_t * vnm, u32 sw_if_index)
 528 {
 529   u32 flags = vnet_sw_interface_get_flags (vnm, sw_if_index);
 530
 531   if (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
 532     {
 533       flags &= ~(VNET_SW_INTERFACE_FLAG_ADMIN_UP);
 534       vnet_sw_interface_set_flags (vnm, sw_if_index, flags);
 535     }
 536 }
 537
 538 static u32
 539 vnet_create_sw_interface_no_callbacks (vnet_main_t * vnm,
 540                                        vnet_sw_interface_t * template)
 541 {
 542   vnet_interface_main_t *im = &vnm->interface_main;
 543   vnet_sw_interface_t *sw;
 544   u32 sw_if_index;
 545
 546   pool_get (im->sw_interfaces, sw);
 547   sw_if_index = sw - im->sw_interfaces;
 548
 549   sw[0] = template[0];
 550
 551   sw->flags = 0;
 552   sw->sw_if_index = sw_if_index;
 553   if (sw->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
 554     sw->sup_sw_if_index = sw->sw_if_index;
 555
 556   /* Allocate counters for this interface. */
 557   {
 558     u32 i;
 559
 560     vnet_interface_counter_lock (im);
 561
 562     for (i = 0; i < vec_len (im->sw_if_counters); i++)
 563       {
 564         vlib_validate_simple_counter (&im->sw_if_counters[i], sw_if_index);
 565         vlib_zero_simple_counter (&im->sw_if_counters[i], sw_if_index);
 566       }
 567
 568     for (i = 0; i < vec_len (im->combined_sw_if_counters); i++)
 569       {
 570         vlib_validate_combined_counter (&im->combined_sw_if_counters[i],
 571                                         sw_if_index);
 572         vlib_zero_combined_counter (&im->combined_sw_if_counters[i],
 573                                     sw_if_index);
 574       }
 575
 576     vnet_interface_counter_unlock (im);
 577   }
 578
 579   return sw_if_index;
 580 }
 581
 582 clib_error_t *
 583 vnet_create_sw_interface (vnet_main_t * vnm, vnet_sw_interface_t * template,
 584                           u32 * sw_if_index)
 585 {
 586   clib_error_t *error;
 587   vnet_hw_interface_t *hi;
 588   vnet_device_class_t *dev_class;
 589
 590   if (template->sub.eth.flags.two_tags == 1
 591       && template->sub.eth.flags.exact_match == 1
 592       && (template->sub.eth.flags.inner_vlan_id_any == 1
 593           || template->sub.eth.flags.outer_vlan_id_any == 1))
 594     {
 595       error = clib_error_return (0,
 596                                  "inner-dot1q any exact-match is unsupported");
 597       return error;
 598     }
 599
 600   hi = vnet_get_sup_hw_interface (vnm, template->sup_sw_if_index);
 601   dev_class = vnet_get_device_class (vnm, hi->dev_class_index);
 602
 603   if (template->type == VNET_SW_INTERFACE_TYPE_SUB &&
 604       dev_class->subif_add_del_function)
 605     {
 606       error = dev_class->subif_add_del_function (vnm, hi->hw_if_index,
 607                                                  (struct vnet_sw_interface_t
 608                                                   *) template, 1);
 609       if (error)
 610         return error;
 611     }
 612
 613   *sw_if_index = vnet_create_sw_interface_no_callbacks (vnm, template);
 614   error = vnet_sw_interface_set_flags_helper
 615     (vnm, *sw_if_index, template->flags,
 616      VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE);
 617
 618   if (error)
 619     {
 620       /* undo the work done by vnet_create_sw_interface_no_callbacks() */
 621       vnet_interface_main_t *im = &vnm->interface_main;
 622       vnet_sw_interface_t *sw =
 623         pool_elt_at_index (im->sw_interfaces, *sw_if_index);
 624       pool_put (im->sw_interfaces, sw);
 625     }
 626
 627   return error;
 628 }
 629
 630 void
 631 vnet_delete_sw_interface (vnet_main_t * vnm, u32 sw_if_index)
 632 {
 633   vnet_interface_main_t *im = &vnm->interface_main;
 634   vnet_sw_interface_t *sw =
 635     pool_elt_at_index (im->sw_interfaces, sw_if_index);
 636
 637   /* Check if the interface has config and is removed from L2 BD or XConnect */
 638   vnet_clear_sw_interface_tag (vnm, sw_if_index);
 639
 640   /* Bring down interface in case it is up. */
 641   if (sw->flags != 0)
 642     vnet_sw_interface_set_flags (vnm, sw_if_index, /* flags */ 0);
 643
 644   call_sw_interface_add_del_callbacks (vnm, sw_if_index, /* is_create */ 0);
 645
 646   pool_put (im->sw_interfaces, sw);
 647 }
 648
 649 static clib_error_t *
 650 call_sw_interface_mtu_change_callbacks (vnet_main_t * vnm, u32 sw_if_index)
 651 {
 652   return call_elf_section_interface_callbacks
 653     (vnm, sw_if_index, 0, vnm->sw_interface_mtu_change_functions);
 654 }
 655
 656 void
 657 vnet_sw_interface_set_mtu (vnet_main_t * vnm, u32 sw_if_index, u32 mtu)
 658 {
 659   vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
 660
 661   if (si->mtu[VNET_MTU_L3] != mtu)
 662     {
 663       si->mtu[VNET_MTU_L3] = mtu;
 664       call_sw_interface_mtu_change_callbacks (vnm, sw_if_index);
 665     }
 666 }
 667
 668 void
 669 vnet_sw_interface_set_protocol_mtu (vnet_main_t * vnm, u32 sw_if_index,
 670                                     u32 mtu[])
 671 {
 672   vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
 673   bool changed = false;
 674   int i;
 675
 676   for (i = 0; i < VNET_N_MTU; i++)
 677     {
 678       if (si->mtu[i] != mtu[i])
 679         {
 680           si->mtu[i] = mtu[i];
 681           changed = true;
 682         }
 683     }
 684   /* Notify interested parties */
 685   if (changed)
 686     call_sw_interface_mtu_change_callbacks (vnm, sw_if_index);
 687 }
 688
 689 void
 690 vnet_sw_interface_ip_directed_broadcast (vnet_main_t * vnm,
 691                                          u32 sw_if_index, u8 enable)
 692 {
 693   vnet_sw_interface_t *si;
 694
 695   si = vnet_get_sw_interface (vnm, sw_if_index);
 696
 697   if (enable)
 698     si->flags |= VNET_SW_INTERFACE_FLAG_DIRECTED_BCAST;
 699   else
 700     si->flags &= ~VNET_SW_INTERFACE_FLAG_DIRECTED_BCAST;
 701
 702   ip4_directed_broadcast (sw_if_index, enable);
 703 }
 704
 705 /*
 706  * Reflect a change in hardware MTU on protocol MTUs
 707  */
 708 static walk_rc_t
 709 sw_interface_walk_callback (vnet_main_t * vnm, u32 sw_if_index, void *ctx)
 710 {
 711   u32 *link_mtu = ctx;
 712   vnet_sw_interface_set_mtu (vnm, sw_if_index, *link_mtu);
 713   return WALK_CONTINUE;
 714 }
 715
 716 void
 717 vnet_hw_interface_set_mtu (vnet_main_t * vnm, u32 hw_if_index, u32 mtu)
 718 {
 719   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
 720
 721   if (hi->max_packet_bytes != mtu)
 722     {
 723       hi->max_packet_bytes = mtu;
 724       ethernet_set_flags (vnm, hw_if_index, ETHERNET_INTERFACE_FLAG_MTU);
 725       vnet_hw_interface_walk_sw (vnm, hw_if_index, sw_interface_walk_callback,
 726                                  &mtu);
 727     }
 728 }
 729
 730 static void
 731 setup_tx_node (vlib_main_t * vm,
 732                u32 node_index, vnet_device_class_t * dev_class)
 733 {
 734   vlib_node_t *n = vlib_get_node (vm, node_index);
 735
 736   n->function = dev_class->tx_function;
 737   n->format_trace = dev_class->format_tx_trace;
 738
 739   vlib_register_errors (vm, node_index,
 740                         dev_class->tx_function_n_errors,
 741                         dev_class->tx_function_error_strings);
 742 }
 743
 744 static void
 745 setup_output_node (vlib_main_t * vm,
 746                    u32 node_index, vnet_hw_interface_class_t * hw_class)
 747 {
 748   vlib_node_t *n = vlib_get_node (vm, node_index);
 749   n->format_buffer = hw_class->format_header;
 750   n->unformat_buffer = hw_class->unformat_header;
 751 }
 752
 753 /* Register an interface instance. */
 754 u32
 755 vnet_register_interface (vnet_main_t * vnm,
 756                          u32 dev_class_index,
 757                          u32 dev_instance,
 758                          u32 hw_class_index, u32 hw_instance)
 759 {
 760   vnet_interface_main_t *im = &vnm->interface_main;
 761   vnet_hw_interface_t *hw;
 762   vnet_device_class_t *dev_class =
 763     vnet_get_device_class (vnm, dev_class_index);
 764   vnet_hw_interface_class_t *hw_class =
 765     vnet_get_hw_interface_class (vnm, hw_class_index);
 766   vlib_main_t *vm = vnm->vlib_main;
 767   vnet_feature_config_main_t *fcm;
 768   vnet_config_main_t *cm;
 769   u32 hw_index, i;
 770   char *tx_node_name = NULL, *output_node_name = NULL;
 771
 772   pool_get (im->hw_interfaces, hw);
 773   clib_memset (hw, 0, sizeof (*hw));
 774   hw->trace_classify_table_index = ~0;
 775
 776   hw_index = hw - im->hw_interfaces;
 777   hw->hw_if_index = hw_index;
 778   hw->default_rx_mode = VNET_HW_IF_RX_MODE_POLLING;
 779
 780   if (dev_class->format_device_name)
 781     hw->name = format (0, "%U", dev_class->format_device_name, dev_instance);
 782   else if (hw_class->format_interface_name)
 783     hw->name = format (0, "%U", hw_class->format_interface_name,
 784                        dev_instance);
 785   else
 786     hw->name = format (0, "%s%x", hw_class->name, dev_instance);
 787
 788   if (!im->hw_interface_by_name)
 789     im->hw_interface_by_name = hash_create_vec ( /* size */ 0,
 790                                                 sizeof (hw->name[0]),
 791                                                 sizeof (uword));
 792
 793   hash_set_mem (im->hw_interface_by_name, hw->name, hw_index);
 794
 795   /* Make hardware interface point to software interface. */
 796   {
 797     vnet_sw_interface_t sw = {
 798       .type = VNET_SW_INTERFACE_TYPE_HARDWARE,
 799       .flood_class = VNET_FLOOD_CLASS_NORMAL,
 800       .hw_if_index = hw_index
 801     };
 802     hw->sw_if_index = vnet_create_sw_interface_no_callbacks (vnm, &sw);
 803   }
 804
 805   hw->dev_class_index = dev_class_index;
 806   hw->dev_instance = dev_instance;
 807   hw->hw_class_index = hw_class_index;
 808   hw->hw_instance = hw_instance;
 809
 810   hw->max_rate_bits_per_sec = 0;
 811   hw->min_packet_bytes = 0;
 812   vnet_sw_interface_set_mtu (vnm, hw->sw_if_index, 0);
 813
 814   if (dev_class->tx_function == 0)
 815     goto no_output_nodes;       /* No output/tx nodes to create */
 816
 817   tx_node_name = (char *) format (0, "%v-tx", hw->name);
 818   output_node_name = (char *) format (0, "%v-output", hw->name);
 819
 820   /* If we have previously deleted interface nodes, re-use them. */
 821   if (vec_len (im->deleted_hw_interface_nodes) > 0)
 822     {
 823       vnet_hw_interface_nodes_t *hn;
 824       vlib_node_t *node;
 825       vlib_node_runtime_t *nrt;
 826
 827       hn = vec_end (im->deleted_hw_interface_nodes) - 1;
 828
 829       hw->tx_node_index = hn->tx_node_index;
 830       hw->output_node_index = hn->output_node_index;
 831
 832       vlib_node_rename (vm, hw->tx_node_index, "%v", tx_node_name);
 833       vlib_node_rename (vm, hw->output_node_index, "%v", output_node_name);
 834
 835       /* *INDENT-OFF* */
 836       foreach_vlib_main ({
 837         vnet_interface_output_runtime_t *rt;
 838
 839         rt = vlib_node_get_runtime_data (this_vlib_main, hw->output_node_index);
 840         ASSERT (rt->is_deleted == 1);
 841         rt->is_deleted = 0;
 842         rt->hw_if_index = hw_index;
 843         rt->sw_if_index = hw->sw_if_index;
 844         rt->dev_instance = hw->dev_instance;
 845
 846         rt = vlib_node_get_runtime_data (this_vlib_main, hw->tx_node_index);
 847         rt->hw_if_index = hw_index;
 848         rt->sw_if_index = hw->sw_if_index;
 849         rt->dev_instance = hw->dev_instance;
 850       });
 851       /* *INDENT-ON* */
 852
 853       /* The new class may differ from the old one.
 854        * Functions have to be updated. */
 855       node = vlib_get_node (vm, hw->output_node_index);
 856       node->function = vnet_interface_output_node;
 857       node->format_trace = format_vnet_interface_output_trace;
 858       /* *INDENT-OFF* */
 859       foreach_vlib_main ({
 860         nrt = vlib_node_get_runtime (this_vlib_main, hw->output_node_index);
 861         nrt->function = node->function;
 862         vlib_node_runtime_perf_counter (this_vlib_main, nrt, 0, 0, 0,
 863                                         VLIB_NODE_RUNTIME_PERF_RESET);
 864       });
 865       /* *INDENT-ON* */
 866
 867       node = vlib_get_node (vm, hw->tx_node_index);
 868       node->function = dev_class->tx_function;
 869       node->format_trace = dev_class->format_tx_trace;
 870       /* *INDENT-OFF* */
 871       foreach_vlib_main ({
 872         nrt = vlib_node_get_runtime (this_vlib_main, hw->tx_node_index);
 873         nrt->function = node->function;
 874         vlib_node_runtime_perf_counter (this_vlib_main, nrt, 0, 0, 0,
 875                                         VLIB_NODE_RUNTIME_PERF_RESET);
 876       });
 877       /* *INDENT-ON* */
 878
 879       _vec_len (im->deleted_hw_interface_nodes) -= 1;
 880     }
 881   else
 882     {
 883       vlib_node_registration_t r;
 884       vnet_interface_output_runtime_t rt = {
 885         .hw_if_index = hw_index,
 886         .sw_if_index = hw->sw_if_index,
 887         .dev_instance = hw->dev_instance,
 888         .is_deleted = 0,
 889       };
 890
 891       clib_memset (&r, 0, sizeof (r));
 892       r.type = VLIB_NODE_TYPE_INTERNAL;
 893       r.runtime_data = &rt;
 894       r.runtime_data_bytes = sizeof (rt);
 895       r.scalar_size = 0;
 896       r.vector_size = sizeof (u32);
 897
 898       r.flags = VLIB_NODE_FLAG_IS_OUTPUT;
 899       r.name = tx_node_name;
 900       r.function = dev_class->tx_function;
 901
 902       hw->tx_node_index = vlib_register_node (vm, &r);
 903
 904       vlib_node_add_named_next_with_slot (vm, hw->tx_node_index,
 905                                           "error-drop",
 906                                           VNET_INTERFACE_TX_NEXT_DROP);
 907
 908       r.flags = 0;
 909       r.name = output_node_name;
 910       r.function = vnet_interface_output_node;
 911       r.format_trace = format_vnet_interface_output_trace;
 912
 913       {
 914         static char *e[] = {
 915           "interface is down",
 916           "interface is deleted",
 917           "no buffers to segment GSO",
 918         };
 919
 920         r.n_errors = ARRAY_LEN (e);
 921         r.error_strings = e;
 922       }
 923       hw->output_node_index = vlib_register_node (vm, &r);
 924
 925       vlib_node_add_named_next_with_slot (vm, hw->output_node_index,
 926                                           "error-drop",
 927                                           VNET_INTERFACE_OUTPUT_NEXT_DROP);
 928       vlib_node_add_next_with_slot (vm, hw->output_node_index,
 929                                     hw->tx_node_index,
 930                                     VNET_INTERFACE_OUTPUT_NEXT_TX);
 931
 932       /* add interface to the list of "output-interface" feature arc start nodes
 933          and clone nexts from 1st interface if it exists */
 934       fcm = vnet_feature_get_config_main (im->output_feature_arc_index);
 935       cm = &fcm->config_main;
 936       i = vec_len (cm->start_node_indices);
 937       vec_validate (cm->start_node_indices, i);
 938       cm->start_node_indices[i] = hw->output_node_index;
 939       if (hw_index)
 940         {
 941           /* copy nexts from 1st interface */
 942           vnet_hw_interface_t *first_hw;
 943           vlib_node_t *first_node;
 944
 945           first_hw = vnet_get_hw_interface (vnm, /* hw_if_index */ 0);
 946           first_node = vlib_get_node (vm, first_hw->output_node_index);
 947
 948           /* 1st 2 nexts are already added above */
 949           for (i = 2; i < vec_len (first_node->next_nodes); i++)
 950             vlib_node_add_next_with_slot (vm, hw->output_node_index,
 951                                           first_node->next_nodes[i], i);
 952         }
 953     }
 954
 955   setup_output_node (vm, hw->output_node_index, hw_class);
 956   setup_tx_node (vm, hw->tx_node_index, dev_class);
 957
 958 no_output_nodes:
 959   /* Call all up/down callbacks with zero flags when interface is created. */
 960   vnet_sw_interface_set_flags_helper (vnm, hw->sw_if_index, /* flags */ 0,
 961                                       VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE);
 962   vnet_hw_interface_set_flags_helper (vnm, hw_index, /* flags */ 0,
 963                                       VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE);
 964   vec_free (tx_node_name);
 965   vec_free (output_node_name);
 966
 967   return hw_index;
 968 }
 969
 970 void
 971 vnet_delete_hw_interface (vnet_main_t * vnm, u32 hw_if_index)
 972 {
 973   vnet_interface_main_t *im = &vnm->interface_main;
 974   vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
 975   vlib_main_t *vm = vnm->vlib_main;
 976   vnet_device_class_t *dev_class = vnet_get_device_class (vnm,
 977                                                           hw->dev_class_index);
 978   /* If it is up, mark it down. */
 979   if (hw->flags != 0)
 980     vnet_hw_interface_set_flags (vnm, hw_if_index, /* flags */ 0);
 981
 982   /* Call delete callbacks. */
 983   call_hw_interface_add_del_callbacks (vnm, hw_if_index, /* is_create */ 0);
 984
 985   /* Delete any sub-interfaces. */
 986   {
 987     u32 id, sw_if_index;
 988     /* *INDENT-OFF* */
 989     hash_foreach (id, sw_if_index, hw->sub_interface_sw_if_index_by_id,
 990     ({
 991       vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
 992       u64 sup_and_sub_key =
 993         ((u64) (si->sup_sw_if_index) << 32) | (u64) si->sub.id;
 994       hash_unset_mem_free (&im->sw_if_index_by_sup_and_sub, &sup_and_sub_key);
 995       vnet_delete_sw_interface (vnm, sw_if_index);
 996     }));
 997     hash_free (hw->sub_interface_sw_if_index_by_id);
 998     /* *INDENT-ON* */
 999   }
1000
1001   /* Delete software interface corresponding to hardware interface. */
1002   vnet_delete_sw_interface (vnm, hw->sw_if_index);
1003
1004   if (dev_class->tx_function)
1005     {
1006       /* Put output/tx nodes into recycle pool */
1007       vnet_hw_interface_nodes_t *dn;
1008
1009       /* *INDENT-OFF* */
1010       foreach_vlib_main
1011         ({
1012           vnet_interface_output_runtime_t *rt =
1013             vlib_node_get_runtime_data (this_vlib_main, hw->output_node_index);
1014
1015           /* Mark node runtime as deleted so output node (if called)
1016            * will drop packets. */
1017           rt->is_deleted = 1;
1018         });
1019       /* *INDENT-ON* */
1020
1021       vlib_node_rename (vm, hw->output_node_index,
1022                         "interface-%d-output-deleted", hw_if_index);
1023       vlib_node_rename (vm, hw->tx_node_index, "interface-%d-tx-deleted",
1024                         hw_if_index);
1025       vec_add2 (im->deleted_hw_interface_nodes, dn, 1);
1026       dn->tx_node_index = hw->tx_node_index;
1027       dn->output_node_index = hw->output_node_index;
1028     }
1029
1030   hash_unset_mem (im->hw_interface_by_name, hw->name);
1031   vec_free (hw->name);
1032   vec_free (hw->hw_address);
1033   vec_free (hw->input_node_thread_index_by_queue);
1034   vec_free (hw->dq_runtime_index_by_queue);
1035
1036   pool_put (im->hw_interfaces, hw);
1037 }
1038
1039 void
1040 vnet_hw_interface_walk_sw (vnet_main_t * vnm,
1041                            u32 hw_if_index,
1042                            vnet_hw_sw_interface_walk_t fn, void *ctx)
1043 {
1044   vnet_hw_interface_t *hi;
1045   u32 id, sw_if_index;
1046
1047   hi = vnet_get_hw_interface (vnm, hw_if_index);
1048   /* the super first, then the sub interfaces */
1049   if (WALK_STOP == fn (vnm, hi->sw_if_index, ctx))
1050     return;
1051
1052   /* *INDENT-OFF* */
1053   hash_foreach (id, sw_if_index,
1054                 hi->sub_interface_sw_if_index_by_id,
1055   ({
1056     if (WALK_STOP == fn (vnm, sw_if_index, ctx))
1057       break;
1058   }));
1059   /* *INDENT-ON* */
1060 }
1061
1062 void
1063 vnet_hw_interface_walk (vnet_main_t * vnm,
1064                         vnet_hw_interface_walk_t fn, void *ctx)
1065 {
1066   vnet_interface_main_t *im;
1067   vnet_hw_interface_t *hi;
1068
1069   im = &vnm->interface_main;
1070
1071   /* *INDENT-OFF* */
1072   pool_foreach (hi, im->hw_interfaces,
1073   ({
1074     if (WALK_STOP == fn(vnm, hi->hw_if_index, ctx))
1075       break;
1076   }));
1077   /* *INDENT-ON* */
1078 }
1079
1080 void
1081 vnet_sw_interface_walk (vnet_main_t * vnm,
1082                         vnet_sw_interface_walk_t fn, void *ctx)
1083 {
1084   vnet_interface_main_t *im;
1085   vnet_sw_interface_t *si;
1086
1087   im = &vnm->interface_main;
1088
1089   /* *INDENT-OFF* */
1090   pool_foreach (si, im->sw_interfaces,
1091   {
1092     if (WALK_STOP == fn (vnm, si, ctx))
1093       break;
1094   });
1095   /* *INDENT-ON* */
1096 }
1097
1098 void
1099 vnet_hw_interface_init_for_class (vnet_main_t * vnm, u32 hw_if_index,
1100                                   u32 hw_class_index, u32 hw_instance)
1101 {
1102   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1103   vnet_hw_interface_class_t *hc =
1104     vnet_get_hw_interface_class (vnm, hw_class_index);
1105
1106   hi->hw_class_index = hw_class_index;
1107   hi->hw_instance = hw_instance;
1108   setup_output_node (vnm->vlib_main, hi->output_node_index, hc);
1109 }
1110
1111 static clib_error_t *
1112 vnet_hw_interface_set_class_helper (vnet_main_t * vnm, u32 hw_if_index,
1113                                     u32 hw_class_index, u32 redistribute)
1114 {
1115   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1116   vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, hi->sw_if_index);
1117   vnet_hw_interface_class_t *old_class =
1118     vnet_get_hw_interface_class (vnm, hi->hw_class_index);
1119   vnet_hw_interface_class_t *new_class =
1120     vnet_get_hw_interface_class (vnm, hw_class_index);
1121   vnet_device_class_t *dev_class =
1122     vnet_get_device_class (vnm, hi->dev_class_index);
1123   clib_error_t *error = 0;
1124
1125   /* New class equals old class?  Nothing to do. */
1126   if (hi->hw_class_index == hw_class_index)
1127     return 0;
1128
1129   /* No need (and incorrect since admin up flag may be set) to do error checking when
1130      receiving unserialize message. */
1131   if (redistribute)
1132     {
1133       if (si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
1134         return clib_error_return (0,
1135                                   "%v must be admin down to change class from %s to %s",
1136                                   hi->name, old_class->name, new_class->name);
1137
1138       /* Make sure interface supports given class. */
1139       if ((new_class->is_valid_class_for_interface
1140            && !new_class->is_valid_class_for_interface (vnm, hw_if_index,
1141                                                         hw_class_index))
1142           || (dev_class->is_valid_class_for_interface
1143               && !dev_class->is_valid_class_for_interface (vnm, hw_if_index,
1144                                                            hw_class_index)))
1145         return clib_error_return (0,
1146                                   "%v class cannot be changed from %s to %s",
1147                                   hi->name, old_class->name, new_class->name);
1148
1149     }
1150
1151   if (old_class->hw_class_change)
1152     old_class->hw_class_change (vnm, hw_if_index, old_class->index,
1153                                 new_class->index);
1154
1155   vnet_hw_interface_init_for_class (vnm, hw_if_index, new_class->index,
1156                                     /* instance */ ~0);
1157
1158   if (new_class->hw_class_change)
1159     new_class->hw_class_change (vnm, hw_if_index, old_class->index,
1160                                 new_class->index);
1161
1162   if (dev_class->hw_class_change)
1163     dev_class->hw_class_change (vnm, hw_if_index, new_class->index);
1164
1165   return error;
1166 }
1167
1168 clib_error_t *
1169 vnet_hw_interface_set_class (vnet_main_t * vnm, u32 hw_if_index,
1170                              u32 hw_class_index)
1171 {
1172   return vnet_hw_interface_set_class_helper (vnm, hw_if_index, hw_class_index,
1173                                              /* redistribute */ 1);
1174 }
1175
1176 static int
1177 vnet_hw_interface_rx_redirect_to_node_helper (vnet_main_t * vnm,
1178                                               u32 hw_if_index,
1179                                               u32 node_index,
1180                                               u32 redistribute)
1181 {
1182   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1183   vnet_device_class_t *dev_class = vnet_get_device_class
1184     (vnm, hi->dev_class_index);
1185
1186   if (dev_class->rx_redirect_to_node)
1187     {
1188       dev_class->rx_redirect_to_node (vnm, hw_if_index, node_index);
1189       return 0;
1190     }
1191
1192   return VNET_API_ERROR_UNIMPLEMENTED;
1193 }
1194
1195 int
1196 vnet_hw_interface_rx_redirect_to_node (vnet_main_t * vnm, u32 hw_if_index,
1197                                        u32 node_index)
1198 {
1199   return vnet_hw_interface_rx_redirect_to_node_helper (vnm, hw_if_index,
1200                                                        node_index,
1201                                                        1 /* redistribute */ );
1202 }
1203
1204 word
1205 vnet_sw_interface_compare (vnet_main_t * vnm,
1206                            uword sw_if_index0, uword sw_if_index1)
1207 {
1208   vnet_sw_interface_t *sup0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1209   vnet_sw_interface_t *sup1 = vnet_get_sup_sw_interface (vnm, sw_if_index1);
1210   vnet_hw_interface_t *h0 = vnet_get_hw_interface (vnm, sup0->hw_if_index);
1211   vnet_hw_interface_t *h1 = vnet_get_hw_interface (vnm, sup1->hw_if_index);
1212
1213   if (h0 != h1)
1214     return vec_cmp (h0->name, h1->name);
1215   return (word) h0->hw_instance - (word) h1->hw_instance;
1216 }
1217
1218 word
1219 vnet_hw_interface_compare (vnet_main_t * vnm,
1220                            uword hw_if_index0, uword hw_if_index1)
1221 {
1222   vnet_hw_interface_t *h0 = vnet_get_hw_interface (vnm, hw_if_index0);
1223   vnet_hw_interface_t *h1 = vnet_get_hw_interface (vnm, hw_if_index1);
1224
1225   if (h0 != h1)
1226     return vec_cmp (h0->name, h1->name);
1227   return (word) h0->hw_instance - (word) h1->hw_instance;
1228 }
1229
1230 int
1231 vnet_sw_interface_is_p2p (vnet_main_t * vnm, u32 sw_if_index)
1232 {
1233   vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
1234   if ((si->type == VNET_SW_INTERFACE_TYPE_P2P) ||
1235       (si->type == VNET_SW_INTERFACE_TYPE_PIPE))
1236     return 1;
1237
1238   vnet_hw_interface_t *hw = vnet_get_sup_hw_interface (vnm, sw_if_index);
1239   vnet_hw_interface_class_t *hc =
1240     vnet_get_hw_interface_class (vnm, hw->hw_class_index);
1241
1242   return (hc->flags & VNET_HW_INTERFACE_CLASS_FLAG_P2P);
1243 }
1244
1245 int
1246 vnet_sw_interface_is_nbma (vnet_main_t * vnm, u32 sw_if_index)
1247 {
1248   vnet_hw_interface_t *hw = vnet_get_sup_hw_interface (vnm, sw_if_index);
1249   vnet_hw_interface_class_t *hc =
1250     vnet_get_hw_interface_class (vnm, hw->hw_class_index);
1251
1252   return (hc->flags & VNET_HW_INTERFACE_CLASS_FLAG_NBMA);
1253 }
1254
1255 clib_error_t *
1256 vnet_interface_init (vlib_main_t * vm)
1257 {
1258   vnet_main_t *vnm = vnet_get_main ();
1259   vnet_interface_main_t *im = &vnm->interface_main;
1260   vlib_buffer_t *b = 0;
1261   vnet_buffer_opaque_t *o = 0;
1262   clib_error_t *error;
1263
1264   /*
1265    * Keep people from shooting themselves in the foot.
1266    */
1267   if (sizeof (b->opaque) != sizeof (vnet_buffer_opaque_t))
1268     {
1269 #define _(a) if (sizeof(o->a) > sizeof (o->unused))                     \
1270       clib_warning                                                      \
1271         ("FATAL: size of opaque union subtype %s is %d (max %d)",       \
1272          #a, sizeof(o->a), sizeof (o->unused));
1273       foreach_buffer_opaque_union_subtype;
1274 #undef _
1275
1276       return clib_error_return
1277         (0, "FATAL: size of vlib buffer opaque %d, size of vnet opaque %d",
1278          sizeof (b->opaque), sizeof (vnet_buffer_opaque_t));
1279     }
1280
1281   clib_spinlock_init (&im->sw_if_counter_lock);
1282   clib_spinlock_lock (&im->sw_if_counter_lock); /* should be no need */
1283
1284   vec_validate (im->sw_if_counters, VNET_N_SIMPLE_INTERFACE_COUNTER - 1);
1285 #define _(E,n,p)                                                        \
1286   im->sw_if_counters[VNET_INTERFACE_COUNTER_##E].name = #n;             \
1287   im->sw_if_counters[VNET_INTERFACE_COUNTER_##E].stat_segment_name = "/" #p "/" #n;
1288   foreach_simple_interface_counter_name
1289 #undef _
1290     vec_validate (im->combined_sw_if_counters,
1291                   VNET_N_COMBINED_INTERFACE_COUNTER - 1);
1292 #define _(E,n,p)                                                        \
1293   im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_##E].name = #n;    \
1294   im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_##E].stat_segment_name = "/" #p "/" #n;
1295   foreach_combined_interface_counter_name
1296 #undef _
1297     clib_spinlock_unlock (&im->sw_if_counter_lock);
1298
1299   im->device_class_by_name = hash_create_string ( /* size */ 0,
1300                                                  sizeof (uword));
1301   {
1302     vnet_device_class_t *c;
1303
1304     c = vnm->device_class_registrations;
1305
1306     while (c)
1307       {
1308         c->index = vec_len (im->device_classes);
1309         hash_set_mem (im->device_class_by_name, c->name, c->index);
1310
1311         if (c->tx_fn_registrations)
1312           {
1313             vlib_node_fn_registration_t *fnr = c->tx_fn_registrations;
1314             int priority = -1;
1315
1316             /* to avoid confusion, please remove ".tx_function" statement
1317                from VNET_DEVICE_CLASS() if using function candidates */
1318             ASSERT (c->tx_function == 0);
1319
1320             while (fnr)
1321               {
1322                 if (fnr->priority > priority)
1323                   {
1324                     priority = fnr->priority;
1325                     c->tx_function = fnr->function;
1326                   }
1327                 fnr = fnr->next_registration;
1328               }
1329           }
1330
1331         vec_add1 (im->device_classes, c[0]);
1332         c = c->next_class_registration;
1333       }
1334   }
1335
1336   im->hw_interface_class_by_name = hash_create_string ( /* size */ 0,
1337                                                        sizeof (uword));
1338
1339   im->sw_if_index_by_sup_and_sub = hash_create_mem (0, sizeof (u64),
1340                                                     sizeof (uword));
1341   {
1342     vnet_hw_interface_class_t *c;
1343
1344     c = vnm->hw_interface_class_registrations;
1345
1346     while (c)
1347       {
1348         c->index = vec_len (im->hw_interface_classes);
1349         hash_set_mem (im->hw_interface_class_by_name, c->name, c->index);
1350
1351         if (NULL == c->build_rewrite)
1352           c->build_rewrite = default_build_rewrite;
1353         if (NULL == c->update_adjacency)
1354           c->update_adjacency = default_update_adjacency;
1355
1356         vec_add1 (im->hw_interface_classes, c[0]);
1357         c = c->next_class_registration;
1358       }
1359   }
1360
1361   /* init per-thread data */
1362   vec_validate_aligned (im->per_thread_data, vlib_num_workers (),
1363                         CLIB_CACHE_LINE_BYTES);
1364
1365   if ((error = vlib_call_init_function (vm, vnet_interface_cli_init)))
1366     return error;
1367
1368   vnm->interface_tag_by_sw_if_index = hash_create (0, sizeof (uword));
1369
1370 #if VLIB_BUFFER_TRACE_TRAJECTORY > 0
1371   if ((error = vlib_call_init_function (vm, trajectory_trace_init)))
1372     return error;
1373 #endif
1374
1375   return 0;
1376 }
1377
1378 VLIB_INIT_FUNCTION (vnet_interface_init);
1379
1380 /* Kludge to renumber interface names [only!] */
1381 int
1382 vnet_interface_name_renumber (u32 sw_if_index, u32 new_show_dev_instance)
1383 {
1384   int rv;
1385   vnet_main_t *vnm = vnet_get_main ();
1386   vnet_interface_main_t *im = &vnm->interface_main;
1387   vnet_hw_interface_t *hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
1388
1389   vnet_device_class_t *dev_class = vnet_get_device_class
1390     (vnm, hi->dev_class_index);
1391
1392   if (dev_class->name_renumber == 0 || dev_class->format_device_name == 0)
1393     return VNET_API_ERROR_UNIMPLEMENTED;
1394
1395   rv = dev_class->name_renumber (hi, new_show_dev_instance);
1396
1397   if (rv)
1398     return rv;
1399
1400   hash_unset_mem (im->hw_interface_by_name, hi->name);
1401   vec_free (hi->name);
1402   /* Use the mapping we set up to call it Ishmael */
1403   hi->name = format (0, "%U", dev_class->format_device_name,
1404                      hi->dev_instance);
1405
1406   hash_set_mem (im->hw_interface_by_name, hi->name, hi->hw_if_index);
1407   return rv;
1408 }
1409
1410 clib_error_t *
1411 vnet_rename_interface (vnet_main_t * vnm, u32 hw_if_index, char *new_name)
1412 {
1413   vnet_interface_main_t *im = &vnm->interface_main;
1414   vlib_main_t *vm = vnm->vlib_main;
1415   vnet_hw_interface_t *hw;
1416   u8 *old_name;
1417   clib_error_t *error = 0;
1418
1419   hw = vnet_get_hw_interface (vnm, hw_if_index);
1420   if (!hw)
1421     {
1422       return clib_error_return (0,
1423                                 "unable to find hw interface for index %u",
1424                                 hw_if_index);
1425     }
1426
1427   old_name = hw->name;
1428
1429   /* set new hw->name */
1430   hw->name = format (0, "%s", new_name);
1431
1432   /* remove the old name to hw_if_index mapping and install the new one */
1433   hash_unset_mem (im->hw_interface_by_name, old_name);
1434   hash_set_mem (im->hw_interface_by_name, hw->name, hw_if_index);
1435
1436   /* rename tx/output nodes */
1437   vlib_node_rename (vm, hw->tx_node_index, "%v-tx", hw->name);
1438   vlib_node_rename (vm, hw->output_node_index, "%v-output", hw->name);
1439
1440   /* free the old name vector */
1441   vec_free (old_name);
1442
1443   return error;
1444 }
1445
1446 clib_error_t *
1447 vnet_hw_interface_add_del_mac_address (vnet_main_t * vnm,
1448                                        u32 hw_if_index,
1449                                        const u8 * mac_address, u8 is_add)
1450 {
1451   clib_error_t *error = 0;
1452   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1453
1454   vnet_device_class_t *dev_class =
1455     vnet_get_device_class (vnm, hi->dev_class_index);
1456
1457   if (!hi->hw_address)
1458     {
1459       error =
1460         clib_error_return
1461         (0, "Secondary MAC Addresses not supported for interface index %u",
1462          hw_if_index);
1463       goto done;
1464     }
1465
1466   if (dev_class->mac_addr_add_del_function)
1467     error = dev_class->mac_addr_add_del_function (hi, mac_address, is_add);
1468
1469   if (!error)
1470     {
1471       vnet_hw_interface_class_t *hw_class;
1472
1473       hw_class = vnet_get_hw_interface_class (vnm, hi->hw_class_index);
1474
1475       if (NULL != hw_class->mac_addr_add_del_function)
1476         error = hw_class->mac_addr_add_del_function (hi, mac_address, is_add);
1477     }
1478
1479   /* If no errors, add to the list of secondary MACs on the ethernet intf */
1480   if (!error)
1481     ethernet_interface_add_del_address (&ethernet_main, hw_if_index,
1482                                         mac_address, is_add);
1483
1484 done:
1485   return error;
1486 }
1487
1488 static clib_error_t *
1489 vnet_hw_interface_change_mac_address_helper (vnet_main_t * vnm,
1490                                              u32 hw_if_index,
1491                                              const u8 * mac_address)
1492 {
1493   clib_error_t *error = 0;
1494   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1495
1496   if (hi->hw_address)
1497     {
1498       u8 *old_address = vec_dup (hi->hw_address);
1499       vnet_device_class_t *dev_class =
1500         vnet_get_device_class (vnm, hi->dev_class_index);
1501       if (dev_class->mac_addr_change_function)
1502         {
1503           error =
1504             dev_class->mac_addr_change_function (hi, old_address,
1505                                                  mac_address);
1506         }
1507       if (!error)
1508         {
1509           vnet_hw_interface_class_t *hw_class;
1510
1511           hw_class = vnet_get_hw_interface_class (vnm, hi->hw_class_index);
1512
1513           if (NULL != hw_class->mac_addr_change_function)
1514             hw_class->mac_addr_change_function (hi, old_address, mac_address);
1515         }
1516       else
1517         {
1518           error =
1519             clib_error_return (0,
1520                                "MAC Address Change is not supported on this interface");
1521         }
1522       vec_free (old_address);
1523     }
1524   else
1525     {
1526       error =
1527         clib_error_return (0,
1528                            "mac address change is not supported for interface index %u",
1529                            hw_if_index);
1530     }
1531   return error;
1532 }
1533
1534 clib_error_t *
1535 vnet_hw_interface_change_mac_address (vnet_main_t * vnm, u32 hw_if_index,
1536                                       const u8 * mac_address)
1537 {
1538   return vnet_hw_interface_change_mac_address_helper
1539     (vnm, hw_if_index, mac_address);
1540 }
1541
1542 /* update the unnumbered state of an interface*/
1543 void
1544 vnet_sw_interface_update_unnumbered (u32 unnumbered_sw_if_index,
1545                                      u32 ip_sw_if_index, u8 enable)
1546 {
1547   vnet_main_t *vnm = vnet_get_main ();
1548   vnet_sw_interface_t *si;
1549   u32 was_unnum;
1550
1551   si = vnet_get_sw_interface (vnm, unnumbered_sw_if_index);
1552   was_unnum = (si->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED);
1553
1554   if (enable)
1555     {
1556       si->flags |= VNET_SW_INTERFACE_FLAG_UNNUMBERED;
1557       si->unnumbered_sw_if_index = ip_sw_if_index;
1558
1559       ip4_main.lookup_main.if_address_pool_index_by_sw_if_index
1560         [unnumbered_sw_if_index] =
1561         ip4_main.
1562         lookup_main.if_address_pool_index_by_sw_if_index[ip_sw_if_index];
1563       ip6_main.
1564         lookup_main.if_address_pool_index_by_sw_if_index
1565         [unnumbered_sw_if_index] =
1566         ip6_main.
1567         lookup_main.if_address_pool_index_by_sw_if_index[ip_sw_if_index];
1568     }
1569   else
1570     {
1571       si->flags &= ~(VNET_SW_INTERFACE_FLAG_UNNUMBERED);
1572       si->unnumbered_sw_if_index = (u32) ~ 0;
1573
1574       ip4_main.lookup_main.if_address_pool_index_by_sw_if_index
1575         [unnumbered_sw_if_index] = ~0;
1576       ip6_main.lookup_main.if_address_pool_index_by_sw_if_index
1577         [unnumbered_sw_if_index] = ~0;
1578     }
1579
1580   if (was_unnum != (si->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED))
1581     {
1582       ip4_sw_interface_enable_disable (unnumbered_sw_if_index, enable);
1583       ip6_sw_interface_enable_disable (unnumbered_sw_if_index, enable);
1584     }
1585 }
1586
1587 vnet_l3_packet_type_t
1588 vnet_link_to_l3_proto (vnet_link_t link)
1589 {
1590   switch (link)
1591     {
1592     case VNET_LINK_IP4:
1593       return (VNET_L3_PACKET_TYPE_IP4);
1594     case VNET_LINK_IP6:
1595       return (VNET_L3_PACKET_TYPE_IP6);
1596     case VNET_LINK_MPLS:
1597       return (VNET_L3_PACKET_TYPE_MPLS);
1598     case VNET_LINK_ARP:
1599       return (VNET_L3_PACKET_TYPE_ARP);
1600     case VNET_LINK_ETHERNET:
1601     case VNET_LINK_NSH:
1602       ASSERT (0);
1603       break;
1604     }
1605   ASSERT (0);
1606   return (0);
1607 }
1608
1609 vnet_mtu_t
1610 vnet_link_to_mtu (vnet_link_t link)
1611 {
1612   switch (link)
1613     {
1614     case VNET_LINK_IP4:
1615       return (VNET_MTU_IP4);
1616     case VNET_LINK_IP6:
1617       return (VNET_MTU_IP6);
1618     case VNET_LINK_MPLS:
1619       return (VNET_MTU_MPLS);
1620     default:
1621       return (VNET_MTU_L3);
1622     }
1623 }
1624
1625 u8 *
1626 default_build_rewrite (vnet_main_t * vnm,
1627                        u32 sw_if_index,
1628                        vnet_link_t link_type, const void *dst_address)
1629 {
1630   return (NULL);
1631 }
1632
1633 void
1634 default_update_adjacency (vnet_main_t * vnm, u32 sw_if_index, u32 ai)
1635 {
1636   ip_adjacency_t *adj;
1637
1638   adj = adj_get (ai);
1639
1640   switch (adj->lookup_next_index)
1641     {
1642     case IP_LOOKUP_NEXT_GLEAN:
1643       adj_glean_update_rewrite (ai);
1644       break;
1645     case IP_LOOKUP_NEXT_ARP:
1646     case IP_LOOKUP_NEXT_BCAST:
1647       /*
1648        * default rewrite in neighbour adj
1649        */
1650       adj_nbr_update_rewrite
1651         (ai,
1652          ADJ_NBR_REWRITE_FLAG_COMPLETE,
1653          vnet_build_rewrite_for_sw_interface (vnm,
1654                                               sw_if_index,
1655                                               adj_get_link_type (ai), NULL));
1656       break;
1657     case IP_LOOKUP_NEXT_MCAST:
1658       /*
1659        * mcast traffic also uses default rewrite string with no mcast
1660        * switch time updates.
1661        */
1662       adj_mcast_update_rewrite
1663         (ai,
1664          vnet_build_rewrite_for_sw_interface (vnm,
1665                                               sw_if_index,
1666                                               adj_get_link_type (ai),
1667                                               NULL), 0);
1668       break;
1669     case IP_LOOKUP_NEXT_DROP:
1670     case IP_LOOKUP_NEXT_PUNT:
1671     case IP_LOOKUP_NEXT_LOCAL:
1672     case IP_LOOKUP_NEXT_REWRITE:
1673     case IP_LOOKUP_NEXT_MCAST_MIDCHAIN:
1674     case IP_LOOKUP_NEXT_MIDCHAIN:
1675     case IP_LOOKUP_NEXT_ICMP_ERROR:
1676     case IP_LOOKUP_N_NEXT:
1677       ASSERT (0);
1678       break;
1679     }
1680 }
1681
1682 clib_error_t *
1683 vnet_hw_interface_set_rss_queues (vnet_main_t * vnm,
1684                                   vnet_hw_interface_t * hi,
1685                                   clib_bitmap_t * bitmap)
1686 {
1687   clib_error_t *error = 0;
1688   vnet_device_class_t *dev_class =
1689     vnet_get_device_class (vnm, hi->dev_class_index);
1690
1691   if (dev_class->set_rss_queues_function)
1692     {
1693       if (clib_bitmap_count_set_bits (bitmap) == 0)
1694         {
1695           error = clib_error_return (0,
1696                                      "must assign at least one valid rss queue");
1697           goto done;
1698         }
1699
1700       error = dev_class->set_rss_queues_function (vnm, hi, bitmap);
1701     }
1702   else
1703     {
1704       error = clib_error_return (0,
1705                                  "setting rss queues is not supported on this interface");
1706     }
1707
1708   if (!error)
1709     {
1710       clib_bitmap_free (hi->rss_queues);
1711       hi->rss_queues = clib_bitmap_dup (bitmap);
1712     }
1713
1714 done:
1715   return error;
1716 }
1717
1718 int collect_detailed_interface_stats_flag = 0;
1719
1720 void
1721 collect_detailed_interface_stats_flag_set (void)
1722 {
1723   collect_detailed_interface_stats_flag = 1;
1724 }
1725
1726 void
1727 collect_detailed_interface_stats_flag_clear (void)
1728 {
1729   collect_detailed_interface_stats_flag = 0;
1730 }
1731
1732 static clib_error_t *
1733 collect_detailed_interface_stats_cli (vlib_main_t * vm,
1734                                       unformat_input_t * input,
1735                                       vlib_cli_command_t * cmd)
1736 {
1737   unformat_input_t _line_input, *line_input = &_line_input;
1738   clib_error_t *error = NULL;
1739
1740   /* Get a line of input. */
1741   if (!unformat_user (input, unformat_line_input, line_input))
1742     return clib_error_return (0, "expected enable | disable");
1743
1744   while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
1745     {
1746       if (unformat (line_input, "enable") || unformat (line_input, "on"))
1747         collect_detailed_interface_stats_flag_set ();
1748       else if (unformat (line_input, "disable")
1749                || unformat (line_input, "off"))
1750         collect_detailed_interface_stats_flag_clear ();
1751       else
1752         {
1753           error = clib_error_return (0, "unknown input `%U'",
1754                                      format_unformat_error, line_input);
1755           goto done;
1756         }
1757     }
1758
1759 done:
1760   unformat_free (line_input);
1761   return error;
1762 }
1763
1764 /* *INDENT-OFF* */
1765 VLIB_CLI_COMMAND (collect_detailed_interface_stats_command, static) = {
1766   .path = "interface collect detailed-stats",
1767   .short_help = "interface collect detailed-stats <enable|disable>",
1768   .function = collect_detailed_interface_stats_cli,
1769 };
1770 /* *INDENT-ON* */
1771
1772 /*
1773  * fd.io coding-style-patch-verification: ON
1774  *
1775  * Local Variables:
1776  * eval: (c-set-style "gnu")
1777  * End:
1778  */