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
  80         return 0;
  81 }
  82
  83 static int zebra_ns_delete(struct ns *ns)
  84 {
  85         struct zebra_ns *zns = (struct zebra_ns *)ns->info;
  86
  87         if (IS_ZEBRA_DEBUG_EVENT)
  88                 zlog_info("ZNS %s with id %u (deleted)", ns->name, ns->ns_id);
  89         if (!zns)
  90                 return 0;
  91         XFREE(MTYPE_ZEBRA_NS, zns);
  92         return 0;
  93 }
  94
  95 static int zebra_ns_enabled(struct ns *ns)
  96 {
  97         struct zebra_ns *zns = ns->info;
  98
  99         if (IS_ZEBRA_DEBUG_EVENT)
 100                 zlog_info("ZNS %s with id %u (enabled)", ns->name, ns->ns_id);
 101         if (!zns)
 102                 return 0;
 103         return zebra_ns_enable(ns->ns_id, (void **)&zns);
 104 }
 105
 106 int zebra_ns_disabled(struct ns *ns)
 107 {
 108         struct zebra_ns *zns = ns->info;
 109
 110         if (IS_ZEBRA_DEBUG_EVENT)
 111                 zlog_info("ZNS %s with id %u (disabled)", ns->name, ns->ns_id);
 112         if (!zns)
 113                 return 0;
 114         return zebra_ns_disable_internal(zns, true);
 115 }
 116
 117 /* Do global enable actions - open sockets, read kernel config etc. */
 118 int zebra_ns_enable(ns_id_t ns_id, void **info)
 119 {
 120         struct zebra_ns *zns = (struct zebra_ns *)(*info);
 121
 122         zns->ns_id = ns_id;
 123
 124 #if defined(HAVE_RTADV)
 125         rtadv_init(zns);
 126 #endif
 127
 128         kernel_init(zns);
 129         interface_list(zns);
 130         route_read(zns);
 131
 132         /* Initiate Table Manager per ZNS */
 133         table_manager_enable(ns_id);
 134
 135         return 0;
 136 }
 137
 138 /* Common handler for ns disable - this can be called during ns config,
 139  * or during zebra shutdown.
 140  */
 141 static int zebra_ns_disable_internal(struct zebra_ns *zns, bool complete)
 142 {
 143         route_table_finish(zns->if_table);
 144 #if defined(HAVE_RTADV)
 145         rtadv_terminate(zns);
 146 #endif
 147
 148         kernel_terminate(zns, complete);
 149
 150         table_manager_disable(zns->ns_id);
 151
 152         zns->ns_id = NS_DEFAULT;
 153
 154         return 0;
 155 }
 156
 157 /* During zebra shutdown, do partial cleanup while the async dataplane
 158  * is still running.
 159  */
 160 int zebra_ns_early_shutdown(struct ns *ns)
 161 {
 162         struct zebra_ns *zns = ns->info;
 163
 164         if (zns == NULL)
 165                 return 0;
 166
 167         return zebra_ns_disable_internal(zns, false);
 168 }
 169
 170 /* During zebra shutdown, do final cleanup
 171  * after all dataplane work is complete.
 172  */
 173 int zebra_ns_final_shutdown(struct ns *ns)
 174 {
 175         struct zebra_ns *zns = ns->info;
 176
 177         if (zns == NULL)
 178                 return 0;
 179
 180         kernel_terminate(zns, true);
 181
 182         return 0;
 183 }
 184
 185 int zebra_ns_init(void)
 186 {
 187         ns_id_t ns_id;
 188         ns_id_t ns_id_external;
 189
 190         dzns = zebra_ns_alloc();
 191
 192         frr_elevate_privs(&zserv_privs) {
 193                 ns_id = zebra_ns_id_get_default();
 194         }
 195         ns_id_external = ns_map_nsid_with_external(ns_id, true);
 196         ns_init_management(ns_id_external, ns_id);
 197
 198         logicalrouter_init(logicalrouter_config_write);
 199
 200         /* Do any needed per-NS data structure allocation. */
 201         dzns->if_table = route_table_init();
 202
 203         /* Register zebra VRF callbacks, create and activate default VRF. */
 204         zebra_vrf_init();
 205
 206         /* Default NS is activated */
 207         zebra_ns_enable(ns_id_external, (void **)&dzns);
 208
 209         if (vrf_is_backend_netns()) {
 210                 ns_add_hook(NS_NEW_HOOK, zebra_ns_new);
 211                 ns_add_hook(NS_ENABLE_HOOK, zebra_ns_enabled);
 212                 ns_add_hook(NS_DISABLE_HOOK, zebra_ns_disabled);
 213                 ns_add_hook(NS_DELETE_HOOK, zebra_ns_delete);
 214                 zebra_ns_notify_parse();
 215                 zebra_ns_notify_init();
 216         }
 217
 218         return 0;
 219 }
 220
 221 static int logicalrouter_config_write(struct vty *vty)
 222 {
 223         struct ns *ns;
 224         int write = 0;
 225
 226         RB_FOREACH (ns, ns_head, &ns_tree) {
 227                 if (ns->ns_id == NS_DEFAULT || ns->name == NULL)
 228                         continue;
 229                 vty_out(vty, "logical-router %u netns %s\n", ns->ns_id,
 230                         ns->name);
 231                 write = 1;
 232         }
 233         return write;
 234 }
 235
 236 int zebra_ns_config_write(struct vty *vty, struct ns *ns)
 237 {
 238         if (ns && ns->name != NULL)
 239                 vty_out(vty, " netns %s\n", ns->name);
 240         return 0;
 241 }