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// SPDX-License-Identifier: GPL-2.0-or-later
/* zebra NS Routines
* Copyright (C) 2016 Cumulus Networks, Inc.
* Donald Sharp
* Copyright (C) 2017/2018 6WIND
*/
#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 "zebra_tc.h"
#include "rib.h"
#include "table_manager.h"
#include "zebra_errors.h"
#include "zebra_dplane.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 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 = XCALLOC(MTYPE_ZEBRA_NS, sizeof(struct zebra_ns));
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);
}
void zebra_ns_startup_continue(struct zebra_dplane_ctx *ctx)
{
struct zebra_ns *zns = zebra_ns_lookup(dplane_ctx_get_ns_id(ctx));
enum zebra_dplane_startup_notifications spot;
if (!zns) {
zlog_err("%s: No Namespace associated with %u", __func__,
dplane_ctx_get_ns_id(ctx));
return;
}
spot = dplane_ctx_get_startup_spot(ctx);
switch (spot) {
case ZEBRA_DPLANE_INTERFACES_READ:
interface_list_tunneldump(zns);
break;
case ZEBRA_DPLANE_TUNNELS_READ:
interface_list_second(zns);
break;
case ZEBRA_DPLANE_ADDRESSES_READ:
route_read(zns);
vlan_read(zns);
kernel_read_pbr_rules(zns);
kernel_read_tc_qdisc(zns);
break;
}
}
/* 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);
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)
{
if (zns->if_table)
route_table_finish(zns->if_table);
zns->if_table = NULL;
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);
zebra_ns_delete(ns);
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;
}
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