zebra/zebra_ns.c

   1 /* zebra NS Routines
   2  * Copyright (C) 2016 Cumulus Networks, Inc.
   3  *                    Donald Sharp
   4  * Copyright (C) 2017/2018 6WIND
   5  *
   6  * This file is part of Quagga.
   7  *
   8  * Quagga is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU General Public License as published by the
  10  * Free Software Foundation; either version 2, or (at your option) any
  11  * later version.
  12  *
  13  * Quagga is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License along
  19  * with this program; see the file COPYING; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  21  */
  22 #include "zebra.h"
  23
  24 #include "lib/ns.h"
  25 #include "lib/vrf.h"
  26 #include "lib/logicalrouter.h"
  27 #include "lib/prefix.h"
  28 #include "lib/memory.h"
  29
  30 #include "rtadv.h"
  31 #include "zebra_ns.h"
  32 #include "zebra_vrf.h"
  33 #include "zebra_memory.h"
  34 #include "rt.h"
  35 #include "zebra_vxlan.h"
  36 #include "debug.h"
  37 #include "zebra_netns_notify.h"
  38 #include "zebra_netns_id.h"
  39 #include "zebra_pbr.h"
  40 #include "rib.h"
  41 #include "table_manager.h"
  42
  43 extern struct zebra_privs_t zserv_privs;
  44
  45 DEFINE_MTYPE(ZEBRA, ZEBRA_NS, "Zebra Name Space")
  46
  47 static struct zebra_ns *dzns;
  48
  49 static int logicalrouter_config_write(struct vty *vty);
  50 static int zebra_ns_disable_internal(struct zebra_ns *zns, bool complete);
  51
  52 struct zebra_ns *zebra_ns_lookup(ns_id_t ns_id)
  53 {
  54         if (ns_id == NS_DEFAULT)
  55                 return dzns;
  56         struct zebra_ns *info = (struct zebra_ns *)ns_info_lookup(ns_id);
  57
  58         return (info == NULL) ? dzns : info;
  59 }
  60
  61 static struct zebra_ns *zebra_ns_alloc(void)
  62 {
  63         return XCALLOC(MTYPE_ZEBRA_NS, sizeof(struct zebra_ns));
  64 }
  65
  66 static int zebra_ns_new(struct ns *ns)
  67 {
  68         struct zebra_ns *zns;
  69
  70         if (IS_ZEBRA_DEBUG_EVENT)
  71                 zlog_info("ZNS %s with id %u (created)", ns->name, ns->ns_id);
  72
  73         zns = zebra_ns_alloc();
  74         ns->info = zns;
  75         zns->ns = ns;
  76
  77         /* Do any needed per-NS data structure allocation. */
  78         zns->if_table = route_table_init();
  79         zebra_vxlan_ns_init(zns);
  80
  81         return 0;
  82 }
  83
  84 static int zebra_ns_delete(struct ns *ns)
  85 {
  86         struct zebra_ns *zns = (struct zebra_ns *)ns->info;
  87
  88         if (IS_ZEBRA_DEBUG_EVENT)
  89                 zlog_info("ZNS %s with id %u (deleted)", ns->name, ns->ns_id);
  90         if (!zns)
  91                 return 0;
  92         XFREE(MTYPE_ZEBRA_NS, zns);
  93         return 0;
  94 }
  95
  96 static int zebra_ns_enabled(struct ns *ns)
  97 {
  98         struct zebra_ns *zns = ns->info;
  99
 100         if (IS_ZEBRA_DEBUG_EVENT)
 101                 zlog_info("ZNS %s with id %u (enabled)", ns->name, ns->ns_id);
 102         if (!zns)
 103                 return 0;
 104         return zebra_ns_enable(ns->ns_id, (void **)&zns);
 105 }
 106
 107 int zebra_ns_disabled(struct ns *ns)
 108 {
 109         struct zebra_ns *zns = ns->info;
 110
 111         if (IS_ZEBRA_DEBUG_EVENT)
 112                 zlog_info("ZNS %s with id %u (disabled)", ns->name, ns->ns_id);
 113         if (!zns)
 114                 return 0;
 115         return zebra_ns_disable_internal(zns, true);
 116 }
 117
 118 /* Do global enable actions - open sockets, read kernel config etc. */
 119 int zebra_ns_enable(ns_id_t ns_id, void **info)
 120 {
 121         struct zebra_ns *zns = (struct zebra_ns *)(*info);
 122
 123         zns->ns_id = ns_id;
 124
 125 #if defined(HAVE_RTADV)
 126         rtadv_init(zns);
 127 #endif
 128
 129         kernel_init(zns);
 130         interface_list(zns);
 131         route_read(zns);
 132
 133         /* Initiate Table Manager per ZNS */
 134         table_manager_enable(ns_id);
 135
 136         return 0;
 137 }
 138
 139 /* Common handler for ns disable - this can be called during ns config,
 140  * or during zebra shutdown.
 141  */
 142 static int zebra_ns_disable_internal(struct zebra_ns *zns, bool complete)
 143 {
 144         route_table_finish(zns->if_table);
 145         zebra_vxlan_ns_disable(zns);
 146 #if defined(HAVE_RTADV)
 147         rtadv_terminate(zns);
 148 #endif
 149
 150         kernel_terminate(zns, complete);
 151
 152         table_manager_disable(zns->ns_id);
 153
 154         zns->ns_id = NS_DEFAULT;
 155
 156         return 0;
 157 }
 158
 159 /* During zebra shutdown, do partial cleanup while the async dataplane
 160  * is still running.
 161  */
 162 int zebra_ns_early_shutdown(struct ns *ns)
 163 {
 164         struct zebra_ns *zns = ns->info;
 165
 166         if (zns == NULL)
 167                 return 0;
 168
 169         return zebra_ns_disable_internal(zns, false);
 170 }
 171
 172 /* During zebra shutdown, do final cleanup
 173  * after all dataplane work is complete.
 174  */
 175 int zebra_ns_final_shutdown(struct ns *ns)
 176 {
 177         struct zebra_ns *zns = ns->info;
 178
 179         if (zns == NULL)
 180                 return 0;
 181
 182         kernel_terminate(zns, true);
 183
 184         return 0;
 185 }
 186
 187 int zebra_ns_init(void)
 188 {
 189         ns_id_t ns_id;
 190         ns_id_t ns_id_external;
 191
 192         dzns = zebra_ns_alloc();
 193
 194         frr_elevate_privs(&zserv_privs) {
 195                 ns_id = zebra_ns_id_get_default();
 196         }
 197         ns_id_external = ns_map_nsid_with_external(ns_id, true);
 198         ns_init_management(ns_id_external, ns_id);
 199
 200         logicalrouter_init(logicalrouter_config_write);
 201
 202         /* Do any needed per-NS data structure allocation. */
 203         dzns->if_table = route_table_init();
 204         zebra_vxlan_ns_init(dzns);
 205
 206         /* Register zebra VRF callbacks, create and activate default VRF. */
 207         zebra_vrf_init();
 208
 209         /* Default NS is activated */
 210         zebra_ns_enable(ns_id_external, (void **)&dzns);
 211
 212         if (vrf_is_backend_netns()) {
 213                 ns_add_hook(NS_NEW_HOOK, zebra_ns_new);
 214                 ns_add_hook(NS_ENABLE_HOOK, zebra_ns_enabled);
 215                 ns_add_hook(NS_DISABLE_HOOK, zebra_ns_disabled);
 216                 ns_add_hook(NS_DELETE_HOOK, zebra_ns_delete);
 217                 zebra_ns_notify_parse();
 218                 zebra_ns_notify_init();
 219         }
 220
 221         return 0;
 222 }
 223
 224 static int logicalrouter_config_write(struct vty *vty)
 225 {
 226         struct ns *ns;
 227         int write = 0;
 228
 229         RB_FOREACH (ns, ns_head, &ns_tree) {
 230                 if (ns->ns_id == NS_DEFAULT || ns->name == NULL)
 231                         continue;
 232                 vty_out(vty, "logical-router %u netns %s\n", ns->ns_id,
 233                         ns->name);
 234                 write = 1;
 235         }
 236         return write;
 237 }
 238
 239 int zebra_ns_config_write(struct vty *vty, struct ns *ns)
 240 {
 241         if (ns && ns->name != NULL)
 242                 vty_out(vty, " netns %s\n", ns->name);
 243         return 0;
 244 }