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Diffstat (limited to '')
| -rw-r--r-- | zebra/zebra_ns.c | 233 |
1 files changed, 233 insertions, 0 deletions
diff --git a/zebra/zebra_ns.c b/zebra/zebra_ns.c new file mode 100644 index 0000000..13fd972 --- /dev/null +++ b/zebra/zebra_ns.c @@ -0,0 +1,233 @@ +/* zebra NS Routines + * Copyright (C) 2016 Cumulus Networks, Inc. + * Donald Sharp + * Copyright (C) 2017/2018 6WIND + * + * This file is part of Quagga. + * + * Quagga is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2, or (at your option) any + * later version. + * + * Quagga is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; see the file COPYING; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ +#include "zebra.h" + +#include "lib/ns.h" +#include "lib/vrf.h" +#include "lib/prefix.h" +#include "lib/memory.h" + +#include "zebra_ns.h" +#include "zebra_vrf.h" +#include "rt.h" +#include "zebra_vxlan.h" +#include "debug.h" +#include "zebra_netns_notify.h" +#include "zebra_netns_id.h" +#include "zebra_pbr.h" +#include "rib.h" +#include "table_manager.h" +#include "zebra_errors.h" + +extern struct zebra_privs_t zserv_privs; + +DEFINE_MTYPE_STATIC(ZEBRA, ZEBRA_NS, "Zebra Name Space"); + +static struct zebra_ns *dzns; + +static int zebra_ns_disable_internal(struct zebra_ns *zns, bool complete); + +struct zebra_ns *zebra_ns_lookup(ns_id_t ns_id) +{ + if (ns_id == NS_DEFAULT) + return dzns; + struct zebra_ns *info = (struct zebra_ns *)ns_info_lookup(ns_id); + + return (info == NULL) ? dzns : info; +} + +static struct zebra_ns *zebra_ns_alloc(void) +{ + return XCALLOC(MTYPE_ZEBRA_NS, sizeof(struct zebra_ns)); +} + +static int zebra_ns_new(struct ns *ns) +{ + struct zebra_ns *zns; + + if (!ns) + return -1; + + if (IS_ZEBRA_DEBUG_EVENT) + zlog_info("ZNS %s with id %u (created)", ns->name, ns->ns_id); + + zns = zebra_ns_alloc(); + ns->info = zns; + zns->ns = ns; + zns->ns_id = ns->ns_id; + + /* Do any needed per-NS data structure allocation. */ + zns->if_table = route_table_init(); + + return 0; +} + +static int zebra_ns_delete(struct ns *ns) +{ + struct zebra_ns *zns = (struct zebra_ns *)ns->info; + + if (IS_ZEBRA_DEBUG_EVENT) + zlog_info("ZNS %s with id %u (deleted)", ns->name, ns->ns_id); + if (!zns) + return 0; + XFREE(MTYPE_ZEBRA_NS, ns->info); + return 0; +} + +static int zebra_ns_enabled(struct ns *ns) +{ + struct zebra_ns *zns = ns->info; + + if (IS_ZEBRA_DEBUG_EVENT) + zlog_info("ZNS %s with id %u (enabled)", ns->name, ns->ns_id); + if (!zns) + return 0; + return zebra_ns_enable(ns->ns_id, (void **)&zns); +} + +int zebra_ns_disabled(struct ns *ns) +{ + struct zebra_ns *zns = ns->info; + + if (IS_ZEBRA_DEBUG_EVENT) + zlog_info("ZNS %s with id %u (disabled)", ns->name, ns->ns_id); + if (!zns) + return 0; + return zebra_ns_disable_internal(zns, true); +} + +/* Do global enable actions - open sockets, read kernel config etc. */ +int zebra_ns_enable(ns_id_t ns_id, void **info) +{ + struct zebra_ns *zns = (struct zebra_ns *)(*info); + + zns->ns_id = ns_id; + + kernel_init(zns); + zebra_dplane_ns_enable(zns, true); + interface_list(zns); + route_read(zns); + kernel_read_pbr_rules(zns); + + return 0; +} + +/* Common handler for ns disable - this can be called during ns config, + * or during zebra shutdown. + */ +static int zebra_ns_disable_internal(struct zebra_ns *zns, bool complete) +{ + route_table_finish(zns->if_table); + + zebra_dplane_ns_enable(zns, false /*Disable*/); + + kernel_terminate(zns, complete); + + zns->ns_id = NS_DEFAULT; + + return 0; +} + +/* During zebra shutdown, do partial cleanup while the async dataplane + * is still running. + */ +int zebra_ns_early_shutdown(struct ns *ns, + void *param_in __attribute__((unused)), + void **param_out __attribute__((unused))) +{ + struct zebra_ns *zns = ns->info; + + if (zns == NULL) + return 0; + + zebra_ns_disable_internal(zns, false); + return NS_WALK_CONTINUE; +} + +/* During zebra shutdown, do final cleanup + * after all dataplane work is complete. + */ +int zebra_ns_final_shutdown(struct ns *ns, + void *param_in __attribute__((unused)), + void **param_out __attribute__((unused))) +{ + struct zebra_ns *zns = ns->info; + + if (zns == NULL) + return 0; + + kernel_terminate(zns, true); + + return NS_WALK_CONTINUE; +} + +int zebra_ns_init(void) +{ + struct ns *default_ns; + ns_id_t ns_id; + ns_id_t ns_id_external; + struct ns *ns; + + frr_with_privs(&zserv_privs) { + ns_id = zebra_ns_id_get_default(); + } + ns_id_external = ns_map_nsid_with_external(ns_id, true); + ns_init_management(ns_id_external, ns_id); + ns = ns_get_default(); + if (ns) + ns->relative_default_ns = ns_id; + + default_ns = ns_lookup(NS_DEFAULT); + if (!default_ns) { + flog_err(EC_ZEBRA_NS_NO_DEFAULT, + "%s: failed to find default ns", __func__); + exit(EXIT_FAILURE); /* This is non-recoverable */ + } + + /* Do any needed per-NS data structure allocation. */ + zebra_ns_new(default_ns); + dzns = default_ns->info; + + /* Register zebra VRF callbacks, create and activate default VRF. */ + zebra_vrf_init(); + + /* Default NS is activated */ + zebra_ns_enable(ns_id_external, (void **)&dzns); + + if (vrf_is_backend_netns()) { + ns_add_hook(NS_NEW_HOOK, zebra_ns_new); + ns_add_hook(NS_ENABLE_HOOK, zebra_ns_enabled); + ns_add_hook(NS_DISABLE_HOOK, zebra_ns_disabled); + ns_add_hook(NS_DELETE_HOOK, zebra_ns_delete); + zebra_ns_notify_parse(); + zebra_ns_notify_init(); + } + + return 0; +} + +int zebra_ns_config_write(struct vty *vty, struct ns *ns) +{ + if (ns && ns->name != NULL) + vty_out(vty, " netns %s\n", ns->name); + return 0; +} |