zebra/zebra_router.c

   1 /* Zebra Router Code.
   2  * Copyright (C) 2018 Cumulus Networks, Inc.
   3  *                    Donald Sharp
   4  *
   5  * This file is part of FRR.
   6  *
   7  * FRR is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License as published by the
   9  * Free Software Foundation; either version 2, or (at your option) any
  10  * later version.
  11  *
  12  * FRR is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with FRR; see the file COPYING.  If not, write to the Free
  19  * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  20  * 02111-1307, USA.
  21  */
  22 #include "zebra.h"
  23
  24 #include <pthread.h>
  25 #include "lib/frratomic.h"
  26
  27 #include "zebra_router.h"
  28 #include "zebra_memory.h"
  29 #include "zebra_pbr.h"
  30 #include "zebra_vxlan.h"
  31 #include "zebra_mlag.h"
  32
  33 struct zebra_router zrouter = {
  34         .multipath_num = MULTIPATH_NUM,
  35 };
  36
  37 static inline int
  38 zebra_router_table_entry_compare(const struct zebra_router_table *e1,
  39                                  const struct zebra_router_table *e2);
  40
  41 RB_GENERATE(zebra_router_table_head, zebra_router_table,
  42             zebra_router_table_entry, zebra_router_table_entry_compare);
  43
  44
  45 static inline int
  46 zebra_router_table_entry_compare(const struct zebra_router_table *e1,
  47                                  const struct zebra_router_table *e2)
  48 {
  49         if (e1->tableid < e2->tableid)
  50                 return -1;
  51         if (e1->tableid > e2->tableid)
  52                 return 1;
  53         if (e1->ns_id < e2->ns_id)
  54                 return -1;
  55         if (e1->ns_id > e2->ns_id)
  56                 return 1;
  57         if (e1->afi < e2->afi)
  58                 return -1;
  59         if (e1->afi > e2->afi)
  60                 return 1;
  61         return (e1->safi - e2->safi);
  62 }
  63
  64
  65 struct route_table *zebra_router_find_table(struct zebra_vrf *zvrf,
  66                                             uint32_t tableid, afi_t afi,
  67                                             safi_t safi)
  68 {
  69         struct zebra_router_table finder;
  70         struct zebra_router_table *zrt;
  71
  72         memset(&finder, 0, sizeof(finder));
  73         finder.afi = afi;
  74         finder.safi = safi;
  75         finder.tableid = tableid;
  76         finder.ns_id = zvrf->zns->ns_id;
  77         zrt = RB_FIND(zebra_router_table_head, &zrouter.tables, &finder);
  78
  79         if (zrt)
  80                 return zrt->table;
  81         else
  82                 return NULL;
  83 }
  84
  85 struct route_table *zebra_router_get_table(struct zebra_vrf *zvrf,
  86                                            uint32_t tableid, afi_t afi,
  87                                            safi_t safi)
  88 {
  89         struct zebra_router_table finder;
  90         struct zebra_router_table *zrt;
  91         rib_table_info_t *info;
  92
  93         memset(&finder, 0, sizeof(finder));
  94         finder.afi = afi;
  95         finder.safi = safi;
  96         finder.tableid = tableid;
  97         finder.ns_id = zvrf->zns->ns_id;
  98         zrt = RB_FIND(zebra_router_table_head, &zrouter.tables, &finder);
  99
 100         if (zrt)
 101                 return zrt->table;
 102
 103         zrt = XCALLOC(MTYPE_ZEBRA_NS, sizeof(*zrt));
 104         zrt->tableid = tableid;
 105         zrt->afi = afi;
 106         zrt->safi = safi;
 107         zrt->ns_id = zvrf->zns->ns_id;
 108         zrt->table =
 109                 (afi == AFI_IP6) ? srcdest_table_init() : route_table_init();
 110
 111         info = XCALLOC(MTYPE_RIB_TABLE_INFO, sizeof(*info));
 112         info->zvrf = zvrf;
 113         info->afi = afi;
 114         info->safi = safi;
 115         route_table_set_info(zrt->table, info);
 116         zrt->table->cleanup = zebra_rtable_node_cleanup;
 117
 118         RB_INSERT(zebra_router_table_head, &zrouter.tables, zrt);
 119         return zrt->table;
 120 }
 121
 122 void zebra_router_show_table_summary(struct vty *vty)
 123 {
 124         struct zebra_router_table *zrt;
 125
 126         vty_out(vty,
 127                 "VRF             NS ID    VRF ID     AFI            SAFI    Table      Count\n");
 128         vty_out(vty,
 129                 "---------------------------------------------------------------------------\n");
 130         RB_FOREACH (zrt, zebra_router_table_head, &zrouter.tables) {
 131                 rib_table_info_t *info = route_table_get_info(zrt->table);
 132
 133                 vty_out(vty, "%-16s%5d %9d %7s %15s %8d %10lu\n", info->zvrf->vrf->name,
 134                         zrt->ns_id, info->zvrf->vrf->vrf_id,
 135                         afi2str(zrt->afi), safi2str(zrt->safi),
 136                         zrt->tableid,
 137                         zrt->table->count);
 138         }
 139 }
 140
 141 void zebra_router_sweep_route(void)
 142 {
 143         struct zebra_router_table *zrt;
 144
 145         RB_FOREACH (zrt, zebra_router_table_head, &zrouter.tables) {
 146                 if (zrt->ns_id != NS_DEFAULT)
 147                         continue;
 148                 rib_sweep_table(zrt->table);
 149         }
 150 }
 151
 152 static void zebra_router_free_table(struct zebra_router_table *zrt)
 153 {
 154         void *table_info;
 155
 156         table_info = route_table_get_info(zrt->table);
 157         route_table_finish(zrt->table);
 158         RB_REMOVE(zebra_router_table_head, &zrouter.tables, zrt);
 159
 160         XFREE(MTYPE_RIB_TABLE_INFO, table_info);
 161         XFREE(MTYPE_ZEBRA_NS, zrt);
 162 }
 163
 164 void zebra_router_release_table(struct zebra_vrf *zvrf, uint32_t tableid,
 165                                 afi_t afi, safi_t safi)
 166 {
 167         struct zebra_router_table finder;
 168         struct zebra_router_table *zrt;
 169
 170         memset(&finder, 0, sizeof(finder));
 171         finder.afi = afi;
 172         finder.safi = safi;
 173         finder.tableid = tableid;
 174         finder.ns_id = zvrf->zns->ns_id;
 175         zrt = RB_FIND(zebra_router_table_head, &zrouter.tables, &finder);
 176
 177         if (!zrt)
 178                 return;
 179
 180         zebra_router_free_table(zrt);
 181 }
 182
 183 uint32_t zebra_router_get_next_sequence(void)
 184 {
 185         return 1
 186                + atomic_fetch_add_explicit(&zrouter.sequence_num, 1,
 187                                            memory_order_relaxed);
 188 }
 189
 190 void zebra_router_terminate(void)
 191 {
 192         struct zebra_router_table *zrt, *tmp;
 193
 194         RB_FOREACH_SAFE (zrt, zebra_router_table_head, &zrouter.tables, tmp)
 195                 zebra_router_free_table(zrt);
 196
 197         work_queue_free_and_null(&zrouter.ribq);
 198         meta_queue_free(zrouter.mq);
 199
 200         zebra_vxlan_disable();
 201         zebra_mlag_terminate();
 202
 203         hash_clean(zrouter.rules_hash, zebra_pbr_rules_free);
 204         hash_free(zrouter.rules_hash);
 205
 206         hash_clean(zrouter.ipset_entry_hash, zebra_pbr_ipset_entry_free),
 207                 hash_clean(zrouter.ipset_hash, zebra_pbr_ipset_free);
 208         hash_free(zrouter.ipset_hash);
 209         hash_free(zrouter.ipset_entry_hash);
 210         hash_clean(zrouter.iptable_hash, zebra_pbr_iptable_free);
 211         hash_free(zrouter.iptable_hash);
 212 }
 213
 214 void zebra_router_init(void)
 215 {
 216         zrouter.sequence_num = 0;
 217
 218         zrouter.packets_to_process = ZEBRA_ZAPI_PACKETS_TO_PROCESS;
 219
 220         zebra_vxlan_init();
 221         zebra_mlag_init();
 222
 223         zrouter.rules_hash = hash_create_size(8, zebra_pbr_rules_hash_key,
 224                                               zebra_pbr_rules_hash_equal,
 225                                               "Rules Hash");
 226
 227         zrouter.ipset_hash =
 228                 hash_create_size(8, zebra_pbr_ipset_hash_key,
 229                                  zebra_pbr_ipset_hash_equal, "IPset Hash");
 230
 231         zrouter.ipset_entry_hash = hash_create_size(
 232                 8, zebra_pbr_ipset_entry_hash_key,
 233                 zebra_pbr_ipset_entry_hash_equal, "IPset Hash Entry");
 234
 235         zrouter.iptable_hash = hash_create_size(8, zebra_pbr_iptable_hash_key,
 236                                                 zebra_pbr_iptable_hash_equal,
 237                                                 "IPtable Hash Entry");
 238 }