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/prefix.h"
  27 #include "lib/memory.h"
  28
  29 #include "zebra_ns.h"
  30 #include "zebra_vrf.h"
  31 #include "zebra_memory.h"
  32 #include "rt.h"
  33 #include "zebra_vxlan.h"
  34 #include "debug.h"
  35 #include "zebra_netns_notify.h"
  36 #include "zebra_netns_id.h"
  37 #include "zebra_pbr.h"
  38 #include "rib.h"
  39 #include "table_manager.h"
  40 #include "zebra_errors.h"
  41
  42 extern struct zebra_privs_t zserv_privs;
  43
  44 DEFINE_MTYPE(ZEBRA, ZEBRA_NS, "Zebra Name Space")
  45
  46 static struct zebra_ns *dzns;
  47
  48 static int zebra_ns_disable_internal(struct zebra_ns *zns, bool complete);
  49
  50 struct zebra_ns *zebra_ns_lookup(ns_id_t ns_id)
  51 {
  52         if (ns_id == NS_DEFAULT)
  53                 return dzns;
  54         struct zebra_ns *info = (struct zebra_ns *)ns_info_lookup(ns_id);
  55
  56         return (info == NULL) ? dzns : info;
  57 }
  58
  59 static struct zebra_ns *zebra_ns_alloc(void)
  60 {
  61         return XCALLOC(MTYPE_ZEBRA_NS, sizeof(struct zebra_ns));
  62 }
  63
  64 static int zebra_ns_new(struct ns *ns)
  65 {
  66         struct zebra_ns *zns;
  67
  68         if (!ns)
  69                 return -1;
  70
  71         if (IS_ZEBRA_DEBUG_EVENT)
  72                 zlog_info("ZNS %s with id %u (created)", ns->name, ns->ns_id);
  73
  74         zns = zebra_ns_alloc();
  75         ns->info = zns;
  76         zns->ns = ns;
  77         zns->ns_id = ns->ns_id;
  78
  79         /* Do any needed per-NS data structure allocation. */
  80         zns->if_table = route_table_init();
  81
  82         return 0;
  83 }
  84
  85 static int zebra_ns_delete(struct ns *ns)
  86 {
  87         struct zebra_ns *zns = (struct zebra_ns *)ns->info;
  88
  89         if (IS_ZEBRA_DEBUG_EVENT)
  90                 zlog_info("ZNS %s with id %u (deleted)", ns->name, ns->ns_id);
  91         if (!zns)
  92                 return 0;
  93         XFREE(MTYPE_ZEBRA_NS, ns->info);
  94         return 0;
  95 }
  96
  97 static int zebra_ns_enabled(struct ns *ns)
  98 {
  99         struct zebra_ns *zns = ns->info;
 100
 101         if (IS_ZEBRA_DEBUG_EVENT)
 102                 zlog_info("ZNS %s with id %u (enabled)", ns->name, ns->ns_id);
 103         if (!zns)
 104                 return 0;
 105         return zebra_ns_enable(ns->ns_id, (void **)&zns);
 106 }
 107
 108 int zebra_ns_disabled(struct ns *ns)
 109 {
 110         struct zebra_ns *zns = ns->info;
 111
 112         if (IS_ZEBRA_DEBUG_EVENT)
 113                 zlog_info("ZNS %s with id %u (disabled)", ns->name, ns->ns_id);
 114         if (!zns)
 115                 return 0;
 116         return zebra_ns_disable_internal(zns, true);
 117 }
 118
 119 /* Do global enable actions - open sockets, read kernel config etc. */
 120 int zebra_ns_enable(ns_id_t ns_id, void **info)
 121 {
 122         struct zebra_ns *zns = (struct zebra_ns *)(*info);
 123
 124         zns->ns_id = ns_id;
 125
 126         kernel_init(zns);
 127         interface_list(zns);
 128         route_read(zns);
 129         kernel_read_pbr_rules(zns);
 130
 131         /* Initiate Table Manager per ZNS */
 132         table_manager_enable(ns_id);
 133
 134         return 0;
 135 }
 136
 137 /* Common handler for ns disable - this can be called during ns config,
 138  * or during zebra shutdown.
 139  */
 140 static int zebra_ns_disable_internal(struct zebra_ns *zns, bool complete)
 141 {
 142         route_table_finish(zns->if_table);
 143
 144         kernel_terminate(zns, complete);
 145
 146         table_manager_disable(zns->ns_id);
 147
 148         zns->ns_id = NS_DEFAULT;
 149
 150         return 0;
 151 }
 152
 153 /* During zebra shutdown, do partial cleanup while the async dataplane
 154  * is still running.
 155  */
 156 int zebra_ns_early_shutdown(struct ns *ns,
 157                             void *param_in __attribute__((unused)),
 158                             void **param_out __attribute__((unused)))
 159 {
 160         struct zebra_ns *zns = ns->info;
 161
 162         if (zns == NULL)
 163                 return 0;
 164
 165         zebra_ns_disable_internal(zns, false);
 166         return NS_WALK_CONTINUE;
 167 }
 168
 169 /* During zebra shutdown, do final cleanup
 170  * after all dataplane work is complete.
 171  */
 172 int zebra_ns_final_shutdown(struct ns *ns,
 173                             void *param_in __attribute__((unused)),
 174                             void **param_out __attribute__((unused)))
 175 {
 176         struct zebra_ns *zns = ns->info;
 177
 178         if (zns == NULL)
 179                 return 0;
 180
 181         kernel_terminate(zns, true);
 182
 183         return NS_WALK_CONTINUE;
 184 }
 185
 186 int zebra_ns_init(const char *optional_default_name)
 187 {
 188         struct ns *default_ns;
 189         ns_id_t ns_id;
 190         ns_id_t ns_id_external;
 191         struct ns *ns;
 192
 193         frr_with_privs(&zserv_privs) {
 194                 ns_id = zebra_ns_id_get_default();
 195         }
 196         ns_id_external = ns_map_nsid_with_external(ns_id, true);
 197         ns_init_management(ns_id_external, ns_id);
 198         ns = ns_get_default();
 199         if (ns)
 200                 ns->relative_default_ns = ns_id;
 201
 202         default_ns = ns_lookup(NS_DEFAULT);
 203         if (!default_ns) {
 204                 flog_err(EC_ZEBRA_NS_NO_DEFAULT,
 205                          "%s: failed to find default ns", __func__);
 206                 exit(EXIT_FAILURE); /* This is non-recoverable */
 207         }
 208
 209         /* Do any needed per-NS data structure allocation. */
 210         zebra_ns_new(default_ns);
 211         dzns = default_ns->info;
 212
 213         /* Register zebra VRF callbacks, create and activate default VRF. */
 214         zebra_vrf_init();
 215
 216         /* Default NS is activated */
 217         zebra_ns_enable(ns_id_external, (void **)&dzns);
 218
 219         if (optional_default_name)
 220                 vrf_set_default_name(optional_default_name,
 221                                      true);
 222
 223         if (vrf_is_backend_netns()) {
 224                 ns_add_hook(NS_NEW_HOOK, zebra_ns_new);
 225                 ns_add_hook(NS_ENABLE_HOOK, zebra_ns_enabled);
 226                 ns_add_hook(NS_DISABLE_HOOK, zebra_ns_disabled);
 227                 ns_add_hook(NS_DELETE_HOOK, zebra_ns_delete);
 228                 zebra_ns_notify_parse();
 229                 zebra_ns_notify_init();
 230         }
 231
 232         return 0;
 233 }
 234
 235 int zebra_ns_config_write(struct vty *vty, struct ns *ns)
 236 {
 237         if (ns && ns->name != NULL)
 238                 vty_out(vty, " netns %s\n", ns->name);
 239         return 0;
 240 }