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 "rt.h"
  32 #include "zebra_vxlan.h"
  33 #include "debug.h"
  34 #include "zebra_netns_notify.h"
  35 #include "zebra_netns_id.h"
  36 #include "zebra_pbr.h"
  37 #include "zebra_tc.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_STATIC(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         zebra_dplane_ns_enable(zns, true);
 128         interface_list(zns);
 129         route_read(zns);
 130         kernel_read_pbr_rules(zns);
 131         kernel_read_tc_qdisc(zns);
 132
 133         return 0;
 134 }
 135
 136 /* Common handler for ns disable - this can be called during ns config,
 137  * or during zebra shutdown.
 138  */
 139 static int zebra_ns_disable_internal(struct zebra_ns *zns, bool complete)
 140 {
 141         if (zns->if_table)
 142                 route_table_finish(zns->if_table);
 143         zns->if_table = NULL;
 144
 145         zebra_dplane_ns_enable(zns, false /*Disable*/);
 146
 147         kernel_terminate(zns, complete);
 148
 149         zns->ns_id = NS_DEFAULT;
 150
 151         return 0;
 152 }
 153
 154 /* During zebra shutdown, do partial cleanup while the async dataplane
 155  * is still running.
 156  */
 157 int zebra_ns_early_shutdown(struct ns *ns,
 158                             void *param_in __attribute__((unused)),
 159                             void **param_out __attribute__((unused)))
 160 {
 161         struct zebra_ns *zns = ns->info;
 162
 163         if (zns == NULL)
 164                 return 0;
 165
 166         zebra_ns_disable_internal(zns, false);
 167         return NS_WALK_CONTINUE;
 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                             void *param_in __attribute__((unused)),
 175                             void **param_out __attribute__((unused)))
 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 NS_WALK_CONTINUE;
 185 }
 186
 187 int zebra_ns_init(void)
 188 {
 189         struct ns *default_ns;
 190         ns_id_t ns_id;
 191         ns_id_t ns_id_external;
 192         struct ns *ns;
 193
 194         frr_with_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         ns = ns_get_default();
 200         if (ns)
 201                 ns->relative_default_ns = ns_id;
 202
 203         default_ns = ns_lookup(NS_DEFAULT);
 204         if (!default_ns) {
 205                 flog_err(EC_ZEBRA_NS_NO_DEFAULT,
 206                          "%s: failed to find default ns", __func__);
 207                 exit(EXIT_FAILURE); /* This is non-recoverable */
 208         }
 209
 210         /* Do any needed per-NS data structure allocation. */
 211         zebra_ns_new(default_ns);
 212         dzns = default_ns->info;
 213
 214         /* Register zebra VRF callbacks, create and activate default VRF. */
 215         zebra_vrf_init();
 216
 217         /* Default NS is activated */
 218         zebra_ns_enable(ns_id_external, (void **)&dzns);
 219
 220         if (vrf_is_backend_netns()) {
 221                 ns_add_hook(NS_NEW_HOOK, zebra_ns_new);
 222                 ns_add_hook(NS_ENABLE_HOOK, zebra_ns_enabled);
 223                 ns_add_hook(NS_DISABLE_HOOK, zebra_ns_disabled);
 224                 ns_add_hook(NS_DELETE_HOOK, zebra_ns_delete);
 225                 zebra_ns_notify_parse();
 226                 zebra_ns_notify_init();
 227         }
 228
 229         return 0;
 230 }
 231
 232 int zebra_ns_config_write(struct vty *vty, struct ns *ns)
 233 {
 234         if (ns && ns->name != NULL)
 235                 vty_out(vty, " netns %s\n", ns->name);
 236         return 0;
 237 }