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         zns->ns_id = ns->ns_id;
  77
  78         /* Do any needed per-NS data structure allocation. */
  79         zns->if_table = route_table_init();
  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 #if defined(HAVE_RTADV)
 146         rtadv_terminate(zns);
 147 #endif
 148
 149         kernel_terminate(zns, complete);
 150
 151         table_manager_disable(zns->ns_id);
 152
 153         zns->ns_id = NS_DEFAULT;
 154
 155         return 0;
 156 }
 157
 158 /* During zebra shutdown, do partial cleanup while the async dataplane
 159  * is still running.
 160  */
 161 int zebra_ns_early_shutdown(struct ns *ns)
 162 {
 163         struct zebra_ns *zns = ns->info;
 164
 165         if (zns == NULL)
 166                 return 0;
 167
 168         return zebra_ns_disable_internal(zns, false);
 169 }
 170
 171 /* During zebra shutdown, do final cleanup
 172  * after all dataplane work is complete.
 173  */
 174 int zebra_ns_final_shutdown(struct ns *ns)
 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 0;
 184 }
 185
 186 int zebra_ns_init(const char *optional_default_name)
 187 {
 188         ns_id_t ns_id;
 189         ns_id_t ns_id_external;
 190
 191         dzns = zebra_ns_alloc();
 192
 193         frr_elevate_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
 199         logicalrouter_init(logicalrouter_config_write);
 200
 201         /* Do any needed per-NS data structure allocation. */
 202         dzns->if_table = route_table_init();
 203
 204         /* Register zebra VRF callbacks, create and activate default VRF. */
 205         zebra_vrf_init();
 206
 207         /* Default NS is activated */
 208         zebra_ns_enable(ns_id_external, (void **)&dzns);
 209
 210         if (optional_default_name)
 211                 vrf_set_default_name(optional_default_name,
 212                                      true);
 213
 214         if (vrf_is_backend_netns()) {
 215                 ns_add_hook(NS_NEW_HOOK, zebra_ns_new);
 216                 ns_add_hook(NS_ENABLE_HOOK, zebra_ns_enabled);
 217                 ns_add_hook(NS_DISABLE_HOOK, zebra_ns_disabled);
 218                 ns_add_hook(NS_DELETE_HOOK, zebra_ns_delete);
 219                 zebra_ns_notify_parse();
 220                 zebra_ns_notify_init();
 221         }
 222
 223         return 0;
 224 }
 225
 226 static int logicalrouter_config_write(struct vty *vty)
 227 {
 228         struct ns *ns;
 229         int write = 0;
 230
 231         RB_FOREACH (ns, ns_head, &ns_tree) {
 232                 if (ns->ns_id == NS_DEFAULT || ns->name == NULL)
 233                         continue;
 234                 vty_out(vty, "logical-router %u netns %s\n", ns->ns_id,
 235                         ns->name);
 236                 write = 1;
 237         }
 238         return write;
 239 }
 240
 241 int zebra_ns_config_write(struct vty *vty, struct ns *ns)
 242 {
 243         if (ns && ns->name != NULL)
 244                 vty_out(vty, " netns %s\n", ns->name);
 245         return 0;
 246 }