pbrd/pbr_map.c

   1 /*
   2  * PBR-map Code
   3  * Copyright (C) 2018 Cumulus Networks, Inc.
   4  *               Donald Sharp
   5  *
   6  * FRR is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by the
   8  * Free Software Foundation; either version 2, or (at your option) any
   9  * later version.
  10  *
  11  * FRR is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; see the file COPYING; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20 #include <zebra.h>
  21
  22 #include "thread.h"
  23 #include "linklist.h"
  24 #include "prefix.h"
  25 #include "table.h"
  26 #include "vrf.h"
  27 #include "nexthop.h"
  28 #include "nexthop_group.h"
  29 #include "memory.h"
  30 #include "log.h"
  31 #include "vty.h"
  32
  33 #include "pbr_nht.h"
  34 #include "pbr_map.h"
  35 #include "pbr_zebra.h"
  36 #include "pbr_memory.h"
  37 #include "pbr_debug.h"
  38 #include "pbr_vrf.h"
  39
  40 DEFINE_MTYPE_STATIC(PBRD, PBR_MAP, "PBR Map")
  41 DEFINE_MTYPE_STATIC(PBRD, PBR_MAP_SEQNO, "PBR Map Sequence")
  42 DEFINE_MTYPE_STATIC(PBRD, PBR_MAP_INTERFACE, "PBR Map Interface")
  43
  44 static uint32_t pbr_map_sequence_unique;
  45
  46 static bool pbr_map_check_valid_internal(struct pbr_map *pbrm);
  47 static inline int pbr_map_compare(const struct pbr_map *pbrmap1,
  48                                   const struct pbr_map *pbrmap2);
  49
  50 RB_GENERATE(pbr_map_entry_head, pbr_map, pbr_map_entry, pbr_map_compare)
  51
  52 struct pbr_map_entry_head pbr_maps = RB_INITIALIZER(&pbr_maps);
  53
  54 DEFINE_QOBJ_TYPE(pbr_map_sequence)
  55
  56 static inline int pbr_map_compare(const struct pbr_map *pbrmap1,
  57                                   const struct pbr_map *pbrmap2)
  58 {
  59         return strcmp(pbrmap1->name, pbrmap2->name);
  60 }
  61
  62 static int pbr_map_sequence_compare(const struct pbr_map_sequence *pbrms1,
  63                                     const struct pbr_map_sequence *pbrms2)
  64 {
  65         if (pbrms1->seqno == pbrms2->seqno)
  66                 return 0;
  67
  68         if (pbrms1->seqno < pbrms2->seqno)
  69                 return -1;
  70
  71         return 1;
  72 }
  73
  74 static void pbr_map_sequence_delete(struct pbr_map_sequence *pbrms)
  75 {
  76         XFREE(MTYPE_TMP, pbrms->internal_nhg_name);
  77
  78         XFREE(MTYPE_PBR_MAP_SEQNO, pbrms);
  79 }
  80
  81 static int pbr_map_interface_compare(const struct pbr_map_interface *pmi1,
  82                                      const struct pbr_map_interface *pmi2)
  83 {
  84         return strcmp(pmi1->ifp->name, pmi2->ifp->name);
  85 }
  86
  87 static void pbr_map_interface_list_delete(struct pbr_map_interface *pmi)
  88 {
  89         struct pbr_map_interface *pmi_int;
  90         struct listnode *node, *nnode;
  91         struct pbr_map *pbrm;
  92
  93         RB_FOREACH (pbrm, pbr_map_entry_head, &pbr_maps) {
  94                 for (ALL_LIST_ELEMENTS(pbrm->incoming, node, nnode, pmi_int)) {
  95                         if (pmi == pmi_int) {
  96                                 pbr_map_policy_delete(pbrm, pmi);
  97                                 return;
  98                         }
  99                 }
 100         }
 101 }
 102
 103 static bool pbrms_is_installed(const struct pbr_map_sequence *pbrms,
 104                                const struct pbr_map_interface *pmi)
 105 {
 106         uint64_t is_installed = (uint64_t)1 << pmi->install_bit;
 107
 108         is_installed &= pbrms->installed;
 109
 110         if (is_installed)
 111                 return true;
 112
 113         return false;
 114 }
 115
 116 /* If any sequence is installed on the interface, assume installed */
 117 static bool
 118 pbr_map_interface_is_installed(const struct pbr_map *pbrm,
 119                                const struct pbr_map_interface *check_pmi)
 120 {
 121
 122         struct pbr_map_sequence *pbrms;
 123         struct pbr_map_interface *pmi;
 124         struct listnode *node, *inode;
 125
 126         for (ALL_LIST_ELEMENTS_RO(pbrm->seqnumbers, node, pbrms))
 127                 for (ALL_LIST_ELEMENTS_RO(pbrm->incoming, inode, pmi))
 128                         if (pmi == check_pmi && pbrms_is_installed(pbrms, pmi))
 129                                 return true;
 130
 131         return false;
 132 }
 133
 134 static bool pbr_map_interface_is_valid(const struct pbr_map_interface *pmi)
 135 {
 136         /* Don't install rules without a real ifindex on the incoming interface.
 137          *
 138          * This can happen when we have config for an interface that does not
 139          * exist or when an interface is changing vrfs.
 140          */
 141         if (pmi->ifp && pmi->ifp->ifindex != IFINDEX_INTERNAL)
 142                 return true;
 143
 144         return false;
 145 }
 146
 147 static void pbr_map_pbrms_update_common(struct pbr_map_sequence *pbrms,
 148                                         bool install, bool changed)
 149 {
 150         struct pbr_map *pbrm;
 151         struct listnode *node;
 152         struct pbr_map_interface *pmi;
 153
 154         pbrm = pbrms->parent;
 155
 156         if (pbrms->nhs_installed && pbrm->incoming->count) {
 157                 for (ALL_LIST_ELEMENTS_RO(pbrm->incoming, node, pmi)) {
 158                         if (!pmi->ifp)
 159                                 continue;
 160
 161                         if (install && !pbr_map_interface_is_valid(pmi))
 162                                 continue;
 163
 164                         pbr_send_pbr_map(pbrms, pmi, install, changed);
 165                 }
 166         }
 167 }
 168
 169 static void pbr_map_pbrms_install(struct pbr_map_sequence *pbrms, bool changed)
 170 {
 171         pbr_map_pbrms_update_common(pbrms, true, changed);
 172 }
 173
 174 static void pbr_map_pbrms_uninstall(struct pbr_map_sequence *pbrms)
 175 {
 176         pbr_map_pbrms_update_common(pbrms, false, false);
 177 }
 178
 179 static const char *const pbr_map_reason_str[] = {
 180         "Invalid NH-group",     "Invalid NH",    "No Nexthops",
 181         "Both NH and NH-Group", "Invalid Src or Dst", "Invalid VRF",
 182         "Deleting Sequence",
 183 };
 184
 185 void pbr_map_reason_string(unsigned int reason, char *buf, int size)
 186 {
 187         unsigned int bit;
 188         int len = 0;
 189
 190         if (!buf)
 191                 return;
 192
 193         for (bit = 0; bit < array_size(pbr_map_reason_str); bit++) {
 194                 if ((reason & (1 << bit)) && (len < size)) {
 195                         len += snprintf((buf + len), (size - len), "%s%s",
 196                                         (len > 0) ? ", " : "",
 197                                         pbr_map_reason_str[bit]);
 198                 }
 199         }
 200 }
 201
 202 void pbr_map_final_interface_deletion(struct pbr_map *pbrm,
 203                                       struct pbr_map_interface *pmi)
 204 {
 205         if (pmi->delete && !pbr_map_interface_is_installed(pbrm, pmi)) {
 206                 listnode_delete(pbrm->incoming, pmi);
 207                 pmi->pbrm = NULL;
 208
 209                 bf_release_index(pbrm->ifi_bitfield, pmi->install_bit);
 210                 XFREE(MTYPE_PBR_MAP_INTERFACE, pmi);
 211         }
 212 }
 213
 214 void pbr_map_interface_delete(struct pbr_map *pbrm, struct interface *ifp_del)
 215 {
 216
 217         struct listnode *node;
 218         struct pbr_map_interface *pmi;
 219
 220         for (ALL_LIST_ELEMENTS_RO(pbrm->incoming, node, pmi)) {
 221                 if (ifp_del == pmi->ifp)
 222                         break;
 223         }
 224
 225         if (pmi)
 226                 pbr_map_policy_delete(pbrm, pmi);
 227 }
 228
 229 void pbr_map_add_interface(struct pbr_map *pbrm, struct interface *ifp_add)
 230 {
 231         struct listnode *node;
 232         struct pbr_map_interface *pmi;
 233
 234         for (ALL_LIST_ELEMENTS_RO(pbrm->incoming, node, pmi)) {
 235                 if (ifp_add == pmi->ifp)
 236                         return;
 237         }
 238
 239         pmi = XCALLOC(MTYPE_PBR_MAP_INTERFACE, sizeof(*pmi));
 240         pmi->ifp = ifp_add;
 241         pmi->pbrm = pbrm;
 242         listnode_add_sort(pbrm->incoming, pmi);
 243
 244         bf_assign_index(pbrm->ifi_bitfield, pmi->install_bit);
 245         pbr_map_check_valid(pbrm->name);
 246         if (pbrm->valid)
 247                 pbr_map_install(pbrm);
 248 }
 249
 250 static int
 251 pbr_map_policy_interface_update_common(const struct interface *ifp,
 252                                        struct pbr_interface **pbr_ifp,
 253                                        struct pbr_map **pbrm)
 254 {
 255         if (!ifp->info) {
 256                 DEBUGD(&pbr_dbg_map, "%s: %s has no pbr_interface info",
 257                        __func__, ifp->name);
 258                 return -1;
 259         }
 260
 261         *pbr_ifp = ifp->info;
 262
 263         *pbrm = pbrm_find((*pbr_ifp)->mapname);
 264
 265         if (!*pbrm) {
 266                 DEBUGD(&pbr_dbg_map, "%s: applied PBR-MAP(%s) does not exist?",
 267                        __func__, (*pbr_ifp)->mapname);
 268                 return -1;
 269         }
 270
 271         return 0;
 272 }
 273
 274 void pbr_map_policy_interface_update(const struct interface *ifp, bool state_up)
 275 {
 276         struct pbr_interface *pbr_ifp;
 277         struct pbr_map_sequence *pbrms;
 278         struct pbr_map *pbrm;
 279         struct listnode *node, *inode;
 280         struct pbr_map_interface *pmi;
 281
 282         if (pbr_map_policy_interface_update_common(ifp, &pbr_ifp, &pbrm))
 283                 return;
 284
 285         DEBUGD(&pbr_dbg_map, "%s: %s %s rules on interface %s", __func__,
 286                pbr_ifp->mapname, (state_up ? "installing" : "removing"),
 287                ifp->name);
 288
 289         /*
 290          * Walk the list and install/remove maps on the interface.
 291          */
 292         for (ALL_LIST_ELEMENTS_RO(pbrm->seqnumbers, node, pbrms))
 293                 for (ALL_LIST_ELEMENTS_RO(pbrm->incoming, inode, pmi))
 294                         if (pmi->ifp == ifp && pbr_map_interface_is_valid(pmi))
 295                                 pbr_send_pbr_map(pbrms, pmi, state_up, false);
 296 }
 297
 298 static void pbrms_vrf_update(struct pbr_map_sequence *pbrms,
 299                              const struct pbr_vrf *pbr_vrf)
 300 {
 301         const char *vrf_name = pbr_vrf_name(pbr_vrf);
 302
 303         if (pbrms->vrf_lookup
 304             && (strncmp(vrf_name, pbrms->vrf_name, sizeof(pbrms->vrf_name))
 305                 == 0)) {
 306                 DEBUGD(&pbr_dbg_map, "\tSeq %u uses vrf %s (%u), updating map",
 307                        pbrms->seqno, vrf_name, pbr_vrf_id(pbr_vrf));
 308
 309                 pbr_map_check(pbrms, false);
 310         }
 311 }
 312
 313 /* Vrf enabled/disabled */
 314 void pbr_map_vrf_update(const struct pbr_vrf *pbr_vrf)
 315 {
 316         struct pbr_map *pbrm;
 317         struct pbr_map_sequence *pbrms;
 318         struct listnode *node;
 319
 320         if (!pbr_vrf)
 321                 return;
 322
 323         bool enabled = pbr_vrf_is_enabled(pbr_vrf);
 324
 325         DEBUGD(&pbr_dbg_map, "%s: %s (%u) %s, updating pbr maps", __func__,
 326                pbr_vrf_name(pbr_vrf), pbr_vrf_id(pbr_vrf),
 327                enabled ? "enabled" : "disabled");
 328
 329         RB_FOREACH (pbrm, pbr_map_entry_head, &pbr_maps) {
 330                 DEBUGD(&pbr_dbg_map, "%s: Looking at %s", __func__, pbrm->name);
 331                 for (ALL_LIST_ELEMENTS_RO(pbrm->seqnumbers, node, pbrms))
 332                         pbrms_vrf_update(pbrms, pbr_vrf);
 333         }
 334 }
 335
 336 void pbr_map_write_interfaces(struct vty *vty, struct interface *ifp)
 337 {
 338         struct pbr_interface *pbr_ifp = ifp->info;
 339
 340         if (pbr_ifp
 341             && strncmp(pbr_ifp->mapname, "", sizeof(pbr_ifp->mapname)) != 0)
 342                 vty_out(vty, " pbr-policy %s\n", pbr_ifp->mapname);
 343 }
 344
 345 struct pbr_map *pbrm_find(const char *name)
 346 {
 347         struct pbr_map pbrm;
 348
 349         strlcpy(pbrm.name, name, sizeof(pbrm.name));
 350
 351         return RB_FIND(pbr_map_entry_head, &pbr_maps, &pbrm);
 352 }
 353
 354 extern void pbr_map_delete(struct pbr_map_sequence *pbrms)
 355 {
 356         struct pbr_map *pbrm;
 357         struct listnode *inode;
 358         struct pbr_map_interface *pmi;
 359
 360         pbrm = pbrms->parent;
 361
 362         for (ALL_LIST_ELEMENTS_RO(pbrm->incoming, inode, pmi))
 363                 pbr_send_pbr_map(pbrms, pmi, false, false);
 364
 365         if (pbrms->nhg)
 366                 pbr_nht_delete_individual_nexthop(pbrms);
 367
 368         listnode_delete(pbrm->seqnumbers, pbrms);
 369
 370         if (pbrm->seqnumbers->count == 0) {
 371                 RB_REMOVE(pbr_map_entry_head, &pbr_maps, pbrm);
 372
 373                 bf_free(pbrm->ifi_bitfield);
 374                 XFREE(MTYPE_PBR_MAP, pbrm);
 375         }
 376 }
 377
 378 static void pbr_map_delete_common(struct pbr_map_sequence *pbrms)
 379 {
 380         struct pbr_map *pbrm = pbrms->parent;
 381
 382         pbr_map_pbrms_uninstall(pbrms);
 383
 384         pbrm->valid = false;
 385         pbrms->nhs_installed = false;
 386         pbrms->reason |= PBR_MAP_INVALID_NO_NEXTHOPS;
 387         XFREE(MTYPE_TMP, pbrms->nhgrp_name);
 388 }
 389
 390 void pbr_map_delete_nexthops(struct pbr_map_sequence *pbrms)
 391 {
 392         pbr_map_delete_common(pbrms);
 393 }
 394
 395 void pbr_map_delete_vrf(struct pbr_map_sequence *pbrms)
 396 {
 397         pbr_map_delete_common(pbrms);
 398 }
 399
 400 struct pbr_map_sequence *pbrms_lookup_unique(uint32_t unique, ifindex_t ifindex,
 401                                              struct pbr_map_interface **ppmi)
 402 {
 403         struct pbr_map_sequence *pbrms;
 404         struct listnode *snode, *inode;
 405         struct pbr_map_interface *pmi;
 406         struct pbr_map *pbrm;
 407
 408         RB_FOREACH (pbrm, pbr_map_entry_head, &pbr_maps) {
 409                 for (ALL_LIST_ELEMENTS_RO(pbrm->incoming, inode, pmi)) {
 410                         if (pmi->ifp->ifindex != ifindex)
 411                                 continue;
 412
 413                         if (ppmi)
 414                                 *ppmi = pmi;
 415
 416                         for (ALL_LIST_ELEMENTS_RO(pbrm->seqnumbers, snode,
 417                                                   pbrms)) {
 418                                 DEBUGD(&pbr_dbg_map, "%s: Comparing %u to %u",
 419                                        __func__, pbrms->unique, unique);
 420                                 if (pbrms->unique == unique)
 421                                         return pbrms;
 422                         }
 423                 }
 424         }
 425
 426         return NULL;
 427 }
 428
 429 static void pbr_map_add_interfaces(struct pbr_map *pbrm)
 430 {
 431         struct interface *ifp;
 432         struct pbr_interface *pbr_ifp;
 433         struct vrf *vrf;
 434
 435         RB_FOREACH (vrf, vrf_name_head, &vrfs_by_name) {
 436                 FOR_ALL_INTERFACES (vrf, ifp) {
 437                         if (ifp->info) {
 438                                 pbr_ifp = ifp->info;
 439                                 if (strcmp(pbrm->name, pbr_ifp->mapname) == 0)
 440                                         pbr_map_add_interface(pbrm, ifp);
 441                         }
 442                 }
 443         }
 444 }
 445
 446 struct pbr_map_sequence *pbrms_get(const char *name, uint32_t seqno)
 447 {
 448         struct pbr_map *pbrm;
 449         struct pbr_map_sequence *pbrms;
 450         struct listnode *node;
 451
 452         pbrm = pbrm_find(name);
 453         if (!pbrm) {
 454                 pbrm = XCALLOC(MTYPE_PBR_MAP, sizeof(*pbrm));
 455                 snprintf(pbrm->name, sizeof(pbrm->name), "%s", name);
 456
 457                 pbrm->seqnumbers = list_new();
 458                 pbrm->seqnumbers->cmp =
 459                         (int (*)(void *, void *))pbr_map_sequence_compare;
 460                 pbrm->seqnumbers->del =
 461                          (void (*)(void *))pbr_map_sequence_delete;
 462
 463                 pbrm->incoming = list_new();
 464                 pbrm->incoming->cmp =
 465                         (int (*)(void *, void *))pbr_map_interface_compare;
 466                 pbrm->incoming->del =
 467                         (void (*)(void *))pbr_map_interface_list_delete;
 468
 469                 RB_INSERT(pbr_map_entry_head, &pbr_maps, pbrm);
 470
 471                 bf_init(pbrm->ifi_bitfield, 64);
 472                 pbr_map_add_interfaces(pbrm);
 473         }
 474
 475         for (ALL_LIST_ELEMENTS_RO(pbrm->seqnumbers, node, pbrms)) {
 476                 if (pbrms->seqno == seqno)
 477                         break;
 478
 479         }
 480
 481         if (!pbrms) {
 482                 pbrms = XCALLOC(MTYPE_PBR_MAP_SEQNO, sizeof(*pbrms));
 483                 pbrms->unique = pbr_map_sequence_unique++;
 484                 pbrms->seqno = seqno;
 485                 pbrms->ruleno = pbr_nht_get_next_rule(seqno);
 486                 pbrms->parent = pbrm;
 487                 pbrms->reason =
 488                         PBR_MAP_INVALID_EMPTY |
 489                         PBR_MAP_INVALID_NO_NEXTHOPS;
 490                 pbrms->vrf_name[0] = '\0';
 491
 492                 QOBJ_REG(pbrms, pbr_map_sequence);
 493                 listnode_add_sort(pbrm->seqnumbers, pbrms);
 494         }
 495
 496         return pbrms;
 497 }
 498
 499 static void
 500 pbr_map_sequence_check_nexthops_valid(struct pbr_map_sequence *pbrms)
 501 {
 502         /* Check if any are present first */
 503         if (!pbrms->vrf_unchanged && !pbrms->vrf_lookup && !pbrms->nhg
 504             && !pbrms->nhgrp_name) {
 505                 pbrms->reason |= PBR_MAP_INVALID_NO_NEXTHOPS;
 506                 return;
 507         }
 508
 509         /*
 510          * Check validness of vrf.
 511          */
 512
 513         /* This one can be considered always valid */
 514         if (pbrms->vrf_unchanged)
 515                 pbrms->nhs_installed = true;
 516
 517         if (pbrms->vrf_lookup) {
 518                 struct pbr_vrf *pbr_vrf =
 519                         pbr_vrf_lookup_by_name(pbrms->vrf_name);
 520
 521                 if (pbr_vrf && pbr_vrf_is_valid(pbr_vrf))
 522                         pbrms->nhs_installed = true;
 523                 else
 524                         pbrms->reason |= PBR_MAP_INVALID_VRF;
 525         }
 526
 527         /*
 528          * Check validness of the nexthop or nexthop-group
 529          */
 530
 531         /* Only nexthop or nexthop group allowed */
 532         if (pbrms->nhg && pbrms->nhgrp_name)
 533                 pbrms->reason |= PBR_MAP_INVALID_BOTH_NHANDGRP;
 534
 535         if (pbrms->nhg &&
 536             !pbr_nht_nexthop_group_valid(pbrms->internal_nhg_name))
 537                 pbrms->reason |= PBR_MAP_INVALID_NEXTHOP;
 538
 539         if (pbrms->nhgrp_name) {
 540                 if (!pbr_nht_nexthop_group_valid(pbrms->nhgrp_name))
 541                         pbrms->reason |= PBR_MAP_INVALID_NEXTHOP_GROUP;
 542                 else
 543                         pbrms->nhs_installed = true;
 544         }
 545 }
 546
 547 static void pbr_map_sequence_check_not_empty(struct pbr_map_sequence *pbrms)
 548 {
 549         if (!pbrms->src && !pbrms->dst && !pbrms->mark)
 550                 pbrms->reason |= PBR_MAP_INVALID_EMPTY;
 551 }
 552
 553 /*
 554  * Checks to see if we think that the pbmrs is valid.  If we think
 555  * the config is valid return true.
 556  */
 557 static void pbr_map_sequence_check_valid(struct pbr_map_sequence *pbrms)
 558 {
 559         pbr_map_sequence_check_nexthops_valid(pbrms);
 560
 561         pbr_map_sequence_check_not_empty(pbrms);
 562 }
 563
 564 static bool pbr_map_check_valid_internal(struct pbr_map *pbrm)
 565 {
 566         struct pbr_map_sequence *pbrms;
 567         struct listnode *node;
 568
 569         pbrm->valid = true;
 570         for (ALL_LIST_ELEMENTS_RO(pbrm->seqnumbers, node, pbrms)) {
 571                 pbrms->reason = 0;
 572                 pbr_map_sequence_check_valid(pbrms);
 573                 /*
 574                  * A pbr_map_sequence that is invalid causes
 575                  * the whole shebang to be invalid
 576                  */
 577                 if (pbrms->reason != 0)
 578                         pbrm->valid = false;
 579         }
 580
 581         return pbrm->valid;
 582 }
 583
 584 /*
 585  * For a given PBR-MAP check to see if we think it is a
 586  * valid config or not.  If so note that it is and return
 587  * that we are valid.
 588  */
 589 bool pbr_map_check_valid(const char *name)
 590 {
 591         struct pbr_map *pbrm;
 592
 593         pbrm = pbrm_find(name);
 594         if (!pbrm) {
 595                 DEBUGD(&pbr_dbg_map,
 596                        "%s: Specified PBR-MAP(%s) does not exist?", __func__,
 597                        name);
 598                 return false;
 599         }
 600
 601         pbr_map_check_valid_internal(pbrm);
 602         return pbrm->valid;
 603 }
 604
 605 void pbr_map_schedule_policy_from_nhg(const char *nh_group)
 606 {
 607         struct pbr_map_sequence *pbrms;
 608         struct pbr_map *pbrm;
 609         struct listnode *node;
 610
 611         RB_FOREACH (pbrm, pbr_map_entry_head, &pbr_maps) {
 612                 DEBUGD(&pbr_dbg_map, "%s: Looking at %s", __func__, pbrm->name);
 613                 for (ALL_LIST_ELEMENTS_RO(pbrm->seqnumbers, node, pbrms)) {
 614                         DEBUGD(&pbr_dbg_map, "\tNH Grp name: %s",
 615                                pbrms->nhgrp_name ?
 616                                pbrms->nhgrp_name : pbrms->internal_nhg_name);
 617
 618                         if (pbrms->nhgrp_name
 619                             && (strcmp(nh_group, pbrms->nhgrp_name) == 0)) {
 620                                 pbrms->nhs_installed = true;
 621
 622                                 pbr_map_check(pbrms, false);
 623                         }
 624
 625                         if (pbrms->nhg
 626                             && (strcmp(nh_group, pbrms->internal_nhg_name)
 627                                 == 0)) {
 628                                 pbrms->nhs_installed = true;
 629
 630                                 pbr_map_check(pbrms, false);
 631                         }
 632                 }
 633         }
 634 }
 635
 636 void pbr_map_policy_install(const char *name)
 637 {
 638         struct pbr_map_sequence *pbrms;
 639         struct pbr_map *pbrm;
 640         struct listnode *node, *inode;
 641         struct pbr_map_interface *pmi;
 642
 643         DEBUGD(&pbr_dbg_map, "%s: for %s", __func__, name);
 644         pbrm = pbrm_find(name);
 645         if (!pbrm)
 646                 return;
 647
 648         for (ALL_LIST_ELEMENTS_RO(pbrm->seqnumbers, node, pbrms)) {
 649                 DEBUGD(&pbr_dbg_map,
 650                        "%s: Looking at what to install %s(%u) %d %d", __func__,
 651                        name, pbrms->seqno, pbrm->valid, pbrms->nhs_installed);
 652
 653                 if (pbrm->valid && pbrms->nhs_installed
 654                     && pbrm->incoming->count) {
 655                         DEBUGD(&pbr_dbg_map, "\tInstalling %s %u", pbrm->name,
 656                                pbrms->seqno);
 657                         for (ALL_LIST_ELEMENTS_RO(pbrm->incoming, inode, pmi))
 658                                 if (pbr_map_interface_is_valid(pmi))
 659                                         pbr_send_pbr_map(pbrms, pmi, true,
 660                                                          false);
 661                 }
 662         }
 663 }
 664
 665 void pbr_map_policy_delete(struct pbr_map *pbrm, struct pbr_map_interface *pmi)
 666 {
 667         struct listnode *node;
 668         struct pbr_map_sequence *pbrms;
 669
 670
 671         for (ALL_LIST_ELEMENTS_RO(pbrm->seqnumbers, node, pbrms))
 672                 pbr_send_pbr_map(pbrms, pmi, false, false);
 673
 674         pmi->delete = true;
 675 }
 676
 677 /*
 678  * For a nexthop group specified, see if any of the pbr-maps
 679  * are using it and if so, check to see that we are still
 680  * valid for usage.  If we are valid then schedule the installation/deletion
 681  * of the pbr-policy.
 682  */
 683 void pbr_map_check_nh_group_change(const char *nh_group)
 684 {
 685         struct pbr_map_sequence *pbrms;
 686         struct pbr_map *pbrm;
 687         struct listnode *node, *inode;
 688         struct pbr_map_interface *pmi;
 689         bool found_name;
 690
 691         RB_FOREACH (pbrm, pbr_map_entry_head, &pbr_maps) {
 692                 for (ALL_LIST_ELEMENTS_RO(pbrm->seqnumbers, node, pbrms)) {
 693                         found_name = false;
 694                         if (pbrms->nhgrp_name)
 695                                 found_name =
 696                                         !strcmp(nh_group, pbrms->nhgrp_name);
 697                         else if (pbrms->nhg)
 698                                 found_name = !strcmp(nh_group,
 699                                                      pbrms->internal_nhg_name);
 700
 701                         if (found_name) {
 702                                 bool original = pbrm->valid;
 703
 704                                 pbr_map_check_valid_internal(pbrm);
 705
 706                                 if (pbrm->valid && (original != pbrm->valid))
 707                                         pbr_map_install(pbrm);
 708
 709                                 if (pbrm->valid == false)
 710                                         for (ALL_LIST_ELEMENTS_RO(
 711                                                      pbrm->incoming, inode,
 712                                                      pmi))
 713                                                 pbr_send_pbr_map(pbrms, pmi,
 714                                                                  false, false);
 715                         }
 716                 }
 717         }
 718 }
 719
 720 void pbr_map_check(struct pbr_map_sequence *pbrms, bool changed)
 721 {
 722         struct pbr_map *pbrm;
 723         bool install;
 724
 725         pbrm = pbrms->parent;
 726         DEBUGD(&pbr_dbg_map, "%s: for %s(%u)", __func__, pbrm->name,
 727                pbrms->seqno);
 728         if (pbr_map_check_valid(pbrm->name))
 729                 DEBUGD(&pbr_dbg_map, "We are totally valid %s",
 730                        pbrm->name);
 731
 732         if (pbrms->reason == PBR_MAP_VALID_SEQUENCE_NUMBER) {
 733                 install = true;
 734                 DEBUGD(&pbr_dbg_map, "%s: Installing %s(%u) reason: %" PRIu64,
 735                        __func__, pbrm->name, pbrms->seqno, pbrms->reason);
 736                 DEBUGD(&pbr_dbg_map,
 737                        "\tSending PBR_MAP_POLICY_INSTALL event");
 738         } else {
 739                 install = false;
 740                 DEBUGD(&pbr_dbg_map, "%s: Removing %s(%u) reason: %" PRIu64,
 741                        __func__, pbrm->name, pbrms->seqno, pbrms->reason);
 742         }
 743
 744         if (install)
 745                 pbr_map_pbrms_install(pbrms, changed);
 746         else
 747                 pbr_map_pbrms_uninstall(pbrms);
 748 }
 749
 750 void pbr_map_install(struct pbr_map *pbrm)
 751 {
 752         struct pbr_map_sequence *pbrms;
 753         struct listnode *node;
 754
 755         if (!pbrm->incoming->count)
 756                 return;
 757
 758         for (ALL_LIST_ELEMENTS_RO(pbrm->seqnumbers, node, pbrms))
 759                 pbr_map_pbrms_install(pbrms, false);
 760 }
 761
 762 void pbr_map_init(void)
 763 {
 764         RB_INIT(pbr_map_entry_head, &pbr_maps);
 765
 766         pbr_map_sequence_unique = 1;
 767 }