mirror of
https://gitlab.nic.cz/labs/bird.git
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2404 lines
58 KiB
C
2404 lines
58 KiB
C
/*
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* BIRD -- Protocols
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*
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* (c) 1998--2000 Martin Mares <mj@ucw.cz>
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*
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* Can be freely distributed and used under the terms of the GNU GPL.
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*/
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#undef LOCAL_DEBUG
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#include "nest/bird.h"
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#include "nest/protocol.h"
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#include "lib/resource.h"
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#include "lib/lists.h"
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#include "lib/event.h"
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#include "lib/timer.h"
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#include "lib/string.h"
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#include "conf/conf.h"
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#include "nest/route.h"
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#include "nest/iface.h"
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#include "nest/mpls.h"
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#include "nest/cli.h"
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#include "filter/filter.h"
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#include "filter/f-inst.h"
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pool *proto_pool;
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list STATIC_LIST_INIT(proto_list);
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static list STATIC_LIST_INIT(protocol_list);
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struct protocol *class_to_protocol[PROTOCOL__MAX];
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#define CD(c, msg, args...) ({ if (c->debug & D_STATES) log(L_TRACE "%s.%s: " msg, c->proto->name, c->name ?: "?", ## args); })
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#define PD(p, msg, args...) ({ if (p->debug & D_STATES) log(L_TRACE "%s: " msg, p->name, ## args); })
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static timer *proto_shutdown_timer;
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static timer *gr_wait_timer;
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#define GRS_NONE 0
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#define GRS_INIT 1
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#define GRS_ACTIVE 2
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#define GRS_DONE 3
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static int graceful_restart_state;
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static u32 graceful_restart_locks;
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static char *p_states[] = { "DOWN", "START", "UP", "STOP" };
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static char *c_states[] = { "DOWN", "START", "UP", "FLUSHING" };
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static char *e_states[] = { "DOWN", "FEEDING", "READY" };
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extern struct protocol proto_unix_iface;
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static void channel_request_reload(struct channel *c);
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static void proto_shutdown_loop(timer *);
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static void proto_rethink_goal(struct proto *p);
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static char *proto_state_name(struct proto *p);
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static void channel_verify_limits(struct channel *c);
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static inline void channel_reset_limit(struct channel_limit *l);
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static inline int proto_is_done(struct proto *p)
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{ return (p->proto_state == PS_DOWN) && (p->active_channels == 0); }
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static inline int channel_is_active(struct channel *c)
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{ return (c->channel_state == CS_START) || (c->channel_state == CS_UP); }
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static inline int channel_reloadable(struct channel *c)
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{ return c->proto->reload_routes && c->reloadable; }
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static inline void
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channel_log_state_change(struct channel *c)
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{
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if (c->export_state)
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CD(c, "State changed to %s/%s", c_states[c->channel_state], e_states[c->export_state]);
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else
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CD(c, "State changed to %s", c_states[c->channel_state]);
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}
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static void
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proto_log_state_change(struct proto *p)
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{
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if (p->debug & D_STATES)
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{
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char *name = proto_state_name(p);
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if (name != p->last_state_name_announced)
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{
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p->last_state_name_announced = name;
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PD(p, "State changed to %s", proto_state_name(p));
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}
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}
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else
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p->last_state_name_announced = NULL;
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}
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struct channel_config *
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proto_cf_find_channel(struct proto_config *pc, uint net_type)
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{
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struct channel_config *cc;
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WALK_LIST(cc, pc->channels)
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if (cc->net_type == net_type)
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return cc;
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return NULL;
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}
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/**
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* proto_find_channel_by_table - find channel connected to a routing table
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* @p: protocol instance
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* @t: routing table
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*
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* Returns pointer to channel or NULL
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*/
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struct channel *
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proto_find_channel_by_table(struct proto *p, struct rtable *t)
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{
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struct channel *c;
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WALK_LIST(c, p->channels)
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if (c->table == t)
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return c;
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return NULL;
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}
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/**
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* proto_find_channel_by_name - find channel by its name
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* @p: protocol instance
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* @n: channel name
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*
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* Returns pointer to channel or NULL
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*/
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struct channel *
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proto_find_channel_by_name(struct proto *p, const char *n)
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{
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struct channel *c;
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WALK_LIST(c, p->channels)
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if (!strcmp(c->name, n))
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return c;
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return NULL;
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}
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/**
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* proto_add_channel - connect protocol to a routing table
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* @p: protocol instance
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* @cf: channel configuration
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*
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* This function creates a channel between the protocol instance @p and the
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* routing table specified in the configuration @cf, making the protocol hear
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* all changes in the table and allowing the protocol to update routes in the
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* table.
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*
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* The channel is linked in the protocol channel list and when active also in
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* the table channel list. Channels are allocated from the global resource pool
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* (@proto_pool) and they are automatically freed when the protocol is removed.
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*/
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struct channel *
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proto_add_channel(struct proto *p, struct channel_config *cf)
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{
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struct channel *c = mb_allocz(proto_pool, cf->channel->channel_size);
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c->name = cf->name;
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c->channel = cf->channel;
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c->proto = p;
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c->table = cf->table->table;
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c->in_filter = cf->in_filter;
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c->out_filter = cf->out_filter;
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c->rx_limit = cf->rx_limit;
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c->in_limit = cf->in_limit;
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c->out_limit = cf->out_limit;
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c->net_type = cf->net_type;
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c->ra_mode = cf->ra_mode;
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c->preference = cf->preference;
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c->debug = cf->debug;
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c->merge_limit = cf->merge_limit;
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c->in_keep_filtered = cf->in_keep_filtered;
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c->rpki_reload = cf->rpki_reload;
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c->bmp_hack = cf->bmp_hack;
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c->channel_state = CS_DOWN;
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c->export_state = ES_DOWN;
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c->last_state_change = current_time();
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c->reloadable = 1;
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init_list(&c->roa_subscriptions);
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CALL(c->channel->init, c, cf);
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add_tail(&p->channels, &c->n);
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CD(c, "Connected to table %s", c->table->name);
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return c;
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}
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void
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proto_remove_channel(struct proto *p UNUSED, struct channel *c)
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{
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ASSERT(c->channel_state == CS_DOWN);
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CD(c, "Removed", c->name);
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rem_node(&c->n);
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mb_free(c);
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}
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static void
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proto_start_channels(struct proto *p)
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{
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struct channel *c;
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WALK_LIST(c, p->channels)
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if (!c->disabled)
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channel_set_state(c, CS_UP);
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}
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static void
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proto_pause_channels(struct proto *p)
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{
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struct channel *c;
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WALK_LIST(c, p->channels)
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if (!c->disabled && channel_is_active(c))
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channel_set_state(c, CS_START);
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}
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static void
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proto_stop_channels(struct proto *p)
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{
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struct channel *c;
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WALK_LIST(c, p->channels)
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if (!c->disabled && channel_is_active(c))
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channel_set_state(c, CS_FLUSHING);
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}
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static void
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proto_remove_channels(struct proto *p)
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{
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struct channel *c;
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WALK_LIST_FIRST(c, p->channels)
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proto_remove_channel(p, c);
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}
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static void
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channel_schedule_feed(struct channel *c, int initial)
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{
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// DBG("%s: Scheduling meal\n", p->name);
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ASSERT(c->channel_state == CS_UP);
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c->export_state = ES_FEEDING;
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c->refeeding = !initial;
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ev_schedule_work(c->feed_event);
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}
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static void
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channel_feed_loop(void *ptr)
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{
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struct channel *c = ptr;
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if (c->export_state != ES_FEEDING)
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return;
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/* Start feeding */
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if (!c->feed_active)
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{
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if (c->proto->feed_begin)
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c->proto->feed_begin(c, !c->refeeding);
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c->refeed_pending = 0;
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}
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// DBG("Feeding protocol %s continued\n", p->name);
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if (!rt_feed_channel(c))
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{
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ev_schedule_work(c->feed_event);
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return;
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}
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/* Reset export limit if the feed ended with acceptable number of exported routes */
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struct channel_limit *l = &c->out_limit;
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if (c->refeeding &&
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(l->state == PLS_BLOCKED) &&
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(c->refeed_count <= l->limit) &&
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(c->stats.exp_routes <= l->limit))
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{
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log(L_INFO "Protocol %s resets route export limit (%u)", c->proto->name, l->limit);
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channel_reset_limit(&c->out_limit);
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/* Continue in feed - it will process routing table again from beginning */
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c->refeed_count = 0;
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ev_schedule_work(c->feed_event);
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return;
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}
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// DBG("Feeding protocol %s finished\n", p->name);
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c->export_state = ES_READY;
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channel_log_state_change(c);
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if (c->proto->feed_end)
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c->proto->feed_end(c);
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/* Restart feeding */
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if (c->refeed_pending)
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channel_request_feeding(c);
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}
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static void
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channel_roa_in_changed(struct rt_subscription *s)
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{
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struct channel *c = s->data;
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int active = c->reload_event && ev_active(c->reload_event);
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CD(c, "Reload triggered by RPKI change%s", active ? " - already active" : "");
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if (!active)
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channel_request_reload(c);
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else
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c->reload_pending = 1;
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}
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static void
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channel_roa_out_changed(struct rt_subscription *s)
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{
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struct channel *c = s->data;
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int active = (c->export_state == ES_FEEDING);
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CD(c, "Feeding triggered by RPKI change%s", active ? " - already active" : "");
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if (!active)
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channel_request_feeding(c);
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else
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c->refeed_pending = 1;
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}
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/* Temporary code, subscriptions should be changed to resources */
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struct roa_subscription {
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struct rt_subscription s;
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node roa_node;
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};
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static int
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channel_roa_is_subscribed(struct channel *c, rtable *tab, int dir)
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{
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void (*hook)(struct rt_subscription *) =
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dir ? channel_roa_in_changed : channel_roa_out_changed;
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struct roa_subscription *s;
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node *n;
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WALK_LIST2(s, n, c->roa_subscriptions, roa_node)
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if ((s->s.tab == tab) && (s->s.hook == hook))
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return 1;
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return 0;
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}
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static void
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channel_roa_subscribe(struct channel *c, rtable *tab, int dir)
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{
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if (channel_roa_is_subscribed(c, tab, dir))
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return;
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struct roa_subscription *s = mb_allocz(c->proto->pool, sizeof(struct roa_subscription));
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s->s.hook = dir ? channel_roa_in_changed : channel_roa_out_changed;
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s->s.data = c;
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rt_subscribe(tab, &s->s);
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add_tail(&c->roa_subscriptions, &s->roa_node);
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}
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static void
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channel_roa_unsubscribe(struct roa_subscription *s)
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{
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rt_unsubscribe(&s->s);
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rem_node(&s->roa_node);
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mb_free(s);
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}
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static void
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channel_roa_subscribe_filter(struct channel *c, int dir)
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{
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const struct filter *f = dir ? c->in_filter : c->out_filter;
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struct rtable *tab;
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int valid = 1, found = 0;
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if ((f == FILTER_ACCEPT) || (f == FILTER_REJECT))
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return;
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/* No automatic reload for non-reloadable channels */
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if (dir && !channel_reloadable(c))
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valid = 0;
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#ifdef CONFIG_BGP
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/* No automatic reload for BGP channels without in_table / out_table */
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if (c->channel == &channel_bgp)
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valid = dir ? !!c->in_table : !!c->out_table;
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#endif
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struct filter_iterator fit;
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FILTER_ITERATE_INIT(&fit, f, c->proto->pool);
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FILTER_ITERATE(&fit, fi)
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{
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switch (fi->fi_code)
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{
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case FI_ROA_CHECK_IMPLICIT:
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tab = fi->i_FI_ROA_CHECK_IMPLICIT.rtc->table;
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if (valid) channel_roa_subscribe(c, tab, dir);
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found = 1;
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break;
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case FI_ROA_CHECK_EXPLICIT:
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tab = fi->i_FI_ROA_CHECK_EXPLICIT.rtc->table;
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if (valid) channel_roa_subscribe(c, tab, dir);
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found = 1;
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break;
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default:
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break;
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}
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}
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FILTER_ITERATE_END;
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FILTER_ITERATE_CLEANUP(&fit);
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if (!valid && found)
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log(L_WARN "%s.%s: Automatic RPKI reload not active for %s",
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c->proto->name, c->name ?: "?", dir ? "import" : "export");
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}
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static void
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channel_roa_unsubscribe_all(struct channel *c)
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{
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struct roa_subscription *s;
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node *n, *x;
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WALK_LIST2_DELSAFE(s, n, x, c->roa_subscriptions, roa_node)
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channel_roa_unsubscribe(s);
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}
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static void
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channel_start_export(struct channel *c)
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{
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ASSERT(c->channel_state == CS_UP);
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ASSERT(c->export_state == ES_DOWN);
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channel_schedule_feed(c, 1); /* Sets ES_FEEDING */
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}
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static void
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channel_stop_export(struct channel *c)
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{
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/* Need to abort feeding */
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if (c->export_state == ES_FEEDING)
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rt_feed_channel_abort(c);
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c->export_state = ES_DOWN;
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c->stats.exp_routes = 0;
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bmap_reset(&c->export_map, 1024);
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}
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/* Called by protocol for reload from in_table */
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void
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channel_schedule_reload(struct channel *c)
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{
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ASSERT(c->channel_state == CS_UP);
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rt_reload_channel_abort(c);
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ev_schedule_work(c->reload_event);
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}
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static void
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channel_reload_loop(void *ptr)
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{
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struct channel *c = ptr;
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/* Start reload */
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if (!c->reload_active)
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c->reload_pending = 0;
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if (!rt_reload_channel(c))
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{
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ev_schedule_work(c->reload_event);
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return;
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}
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/* Restart reload */
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if (c->reload_pending)
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channel_request_reload(c);
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}
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static void
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channel_reset_import(struct channel *c)
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{
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/* Need to abort feeding */
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ev_postpone(c->reload_event);
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rt_reload_channel_abort(c);
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rt_prune_sync(c->in_table, 1);
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}
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static void
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channel_reset_export(struct channel *c)
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{
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/* Just free the routes */
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rt_prune_sync(c->out_table, 1);
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}
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/* Called by protocol to activate in_table */
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void
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channel_setup_in_table(struct channel *c)
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{
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struct rtable_config *cf = mb_allocz(c->proto->pool, sizeof(struct rtable_config));
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cf->name = "import";
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cf->addr_type = c->net_type;
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cf->internal = 1;
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c->in_table = cf->table = rt_setup(c->proto->pool, cf);
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c->reload_event = ev_new_init(c->proto->pool, channel_reload_loop, c);
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}
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/* Called by protocol to activate out_table */
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void
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channel_setup_out_table(struct channel *c)
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{
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struct rtable_config *cf = mb_allocz(c->proto->pool, sizeof(struct rtable_config));
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cf->name = "export";
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cf->addr_type = c->net_type;
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cf->internal = 1;
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c->out_table = rt_setup(c->proto->pool, cf);
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}
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static void
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channel_do_start(struct channel *c)
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{
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rt_lock_table(c->table);
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add_tail(&c->table->channels, &c->table_node);
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c->proto->active_channels++;
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c->feed_event = ev_new_init(c->proto->pool, channel_feed_loop, c);
|
|
|
|
bmap_init(&c->export_map, c->proto->pool, 1024);
|
|
memset(&c->stats, 0, sizeof(struct proto_stats));
|
|
|
|
channel_reset_limit(&c->rx_limit);
|
|
channel_reset_limit(&c->in_limit);
|
|
channel_reset_limit(&c->out_limit);
|
|
|
|
CALL(c->channel->start, c);
|
|
}
|
|
|
|
static void
|
|
channel_do_up(struct channel *c)
|
|
{
|
|
/* Register RPKI/ROA subscriptions */
|
|
if (c->rpki_reload)
|
|
{
|
|
channel_roa_subscribe_filter(c, 1);
|
|
channel_roa_subscribe_filter(c, 0);
|
|
}
|
|
}
|
|
|
|
static void
|
|
channel_do_flush(struct channel *c)
|
|
{
|
|
if (!c->bmp_hack)
|
|
rt_schedule_prune(c->table);
|
|
|
|
c->gr_wait = 0;
|
|
if (c->gr_lock)
|
|
channel_graceful_restart_unlock(c);
|
|
|
|
CALL(c->channel->shutdown, c);
|
|
|
|
/* This have to be done in here, as channel pool is freed before channel_do_down() */
|
|
bmap_free(&c->export_map);
|
|
c->in_table = NULL;
|
|
c->reload_event = NULL;
|
|
c->out_table = NULL;
|
|
|
|
channel_roa_unsubscribe_all(c);
|
|
}
|
|
|
|
static void
|
|
channel_do_down(struct channel *c)
|
|
{
|
|
ASSERT(!c->feed_active && !c->reload_active);
|
|
|
|
rem_node(&c->table_node);
|
|
rt_unlock_table(c->table);
|
|
c->proto->active_channels--;
|
|
|
|
if ((c->stats.imp_routes + c->stats.filt_routes) != 0)
|
|
log(L_ERR "%s: Channel %s is down but still has some routes", c->proto->name, c->name);
|
|
|
|
// bmap_free(&c->export_map);
|
|
memset(&c->stats, 0, sizeof(struct proto_stats));
|
|
|
|
c->in_table = NULL;
|
|
c->reload_event = NULL;
|
|
c->out_table = NULL;
|
|
|
|
/* The in_table and out_table are going to be freed by freeing their resource pools. */
|
|
|
|
CALL(c->channel->cleanup, c);
|
|
|
|
/* Schedule protocol shutddown */
|
|
if (proto_is_done(c->proto))
|
|
ev_schedule(c->proto->event);
|
|
}
|
|
|
|
void
|
|
channel_set_state(struct channel *c, uint state)
|
|
{
|
|
uint cs = c->channel_state;
|
|
uint es = c->export_state;
|
|
|
|
DBG("%s reporting channel %s state transition %s -> %s\n", c->proto->name, c->name, c_states[cs], c_states[state]);
|
|
if (state == cs)
|
|
return;
|
|
|
|
c->channel_state = state;
|
|
c->last_state_change = current_time();
|
|
|
|
switch (state)
|
|
{
|
|
case CS_START:
|
|
ASSERT(cs == CS_DOWN || cs == CS_UP);
|
|
|
|
if (cs == CS_DOWN)
|
|
channel_do_start(c);
|
|
|
|
if (es != ES_DOWN)
|
|
channel_stop_export(c);
|
|
|
|
if (c->in_table && (cs == CS_UP))
|
|
channel_reset_import(c);
|
|
|
|
if (c->out_table && (cs == CS_UP))
|
|
channel_reset_export(c);
|
|
|
|
break;
|
|
|
|
case CS_UP:
|
|
ASSERT(cs == CS_DOWN || cs == CS_START);
|
|
|
|
if (cs == CS_DOWN)
|
|
channel_do_start(c);
|
|
|
|
if (!c->gr_wait && c->proto->rt_notify)
|
|
channel_start_export(c);
|
|
|
|
channel_do_up(c);
|
|
break;
|
|
|
|
case CS_FLUSHING:
|
|
ASSERT(cs == CS_START || cs == CS_UP);
|
|
|
|
if (es != ES_DOWN)
|
|
channel_stop_export(c);
|
|
|
|
if (c->in_table && (cs == CS_UP))
|
|
channel_reset_import(c);
|
|
|
|
if (c->out_table && (cs == CS_UP))
|
|
channel_reset_export(c);
|
|
|
|
channel_do_flush(c);
|
|
break;
|
|
|
|
case CS_DOWN:
|
|
ASSERT(cs == CS_FLUSHING);
|
|
|
|
channel_do_down(c);
|
|
break;
|
|
|
|
default:
|
|
ASSERT(0);
|
|
}
|
|
|
|
channel_log_state_change(c);
|
|
}
|
|
|
|
/**
|
|
* channel_request_feeding - request feeding routes to the channel
|
|
* @c: given channel
|
|
*
|
|
* Sometimes it is needed to send again all routes to the channel. This is
|
|
* called feeding and can be requested by this function. This would cause
|
|
* channel export state transition to ES_FEEDING (during feeding) and when
|
|
* completed, it will switch back to ES_READY. This function can be called
|
|
* even when feeding is already running, in that case it is restarted.
|
|
*/
|
|
void
|
|
channel_request_feeding(struct channel *c)
|
|
{
|
|
ASSERT(c->channel_state == CS_UP);
|
|
|
|
CD(c, "Feeding requested");
|
|
|
|
/* Do nothing if we are still waiting for feeding */
|
|
if (c->export_state == ES_DOWN)
|
|
return;
|
|
|
|
/* If we are already feeding, we want to restart it */
|
|
if (c->export_state == ES_FEEDING)
|
|
{
|
|
/* Unless feeding is in initial state */
|
|
if (!c->feed_active)
|
|
return;
|
|
|
|
rt_feed_channel_abort(c);
|
|
}
|
|
|
|
/* Track number of exported routes during refeed */
|
|
c->refeed_count = 0;
|
|
|
|
channel_schedule_feed(c, 0); /* Sets ES_FEEDING */
|
|
channel_log_state_change(c);
|
|
}
|
|
|
|
static void
|
|
channel_request_reload(struct channel *c)
|
|
{
|
|
ASSERT(c->channel_state == CS_UP);
|
|
ASSERT(channel_reloadable(c));
|
|
|
|
CD(c, "Reload requested");
|
|
|
|
c->proto->reload_routes(c);
|
|
|
|
/*
|
|
* Should this be done before reload_routes() hook?
|
|
* Perhaps, but routes are updated asynchronously.
|
|
*/
|
|
channel_reset_limit(&c->rx_limit);
|
|
channel_reset_limit(&c->in_limit);
|
|
}
|
|
|
|
const struct channel_class channel_basic = {
|
|
.channel_size = sizeof(struct channel),
|
|
.config_size = sizeof(struct channel_config)
|
|
};
|
|
|
|
void *
|
|
channel_config_new(const struct channel_class *cc, const char *name, uint net_type, struct proto_config *proto)
|
|
{
|
|
struct channel_config *cf = NULL;
|
|
struct rtable_config *tab = NULL;
|
|
|
|
if (net_type)
|
|
{
|
|
if (!net_val_match(net_type, proto->protocol->channel_mask))
|
|
cf_error("Unsupported channel type");
|
|
|
|
if (proto->net_type && (net_type != proto->net_type) && (net_type != NET_MPLS))
|
|
cf_error("Different channel type");
|
|
|
|
tab = new_config->def_tables[net_type];
|
|
}
|
|
|
|
if (!cc)
|
|
cc = &channel_basic;
|
|
|
|
cf = cfg_allocz(cc->config_size);
|
|
cf->name = name;
|
|
cf->channel = cc;
|
|
cf->parent = proto;
|
|
cf->table = tab;
|
|
cf->out_filter = FILTER_REJECT;
|
|
|
|
cf->net_type = net_type;
|
|
cf->ra_mode = RA_OPTIMAL;
|
|
cf->preference = proto->protocol->preference;
|
|
cf->debug = new_config->channel_default_debug;
|
|
cf->rpki_reload = 1;
|
|
|
|
add_tail(&proto->channels, &cf->n);
|
|
|
|
return cf;
|
|
}
|
|
|
|
void *
|
|
channel_config_get(const struct channel_class *cc, const char *name, uint net_type, struct proto_config *proto)
|
|
{
|
|
struct channel_config *cf;
|
|
|
|
/* We are using name as token, so no strcmp() */
|
|
WALK_LIST(cf, proto->channels)
|
|
if (cf->name == name)
|
|
{
|
|
/* Allow to redefine channel only if inherited from template */
|
|
if (cf->parent == proto)
|
|
cf_error("Multiple %s channels", name);
|
|
|
|
cf->parent = proto;
|
|
cf->copy = 1;
|
|
return cf;
|
|
}
|
|
|
|
return channel_config_new(cc, name, net_type, proto);
|
|
}
|
|
|
|
struct channel_config *
|
|
channel_copy_config(struct channel_config *src, struct proto_config *proto)
|
|
{
|
|
struct channel_config *dst = cfg_alloc(src->channel->config_size);
|
|
|
|
memcpy(dst, src, src->channel->config_size);
|
|
memset(&dst->n, 0, sizeof(node));
|
|
add_tail(&proto->channels, &dst->n);
|
|
CALL(src->channel->copy_config, dst, src);
|
|
|
|
return dst;
|
|
}
|
|
|
|
|
|
static int reconfigure_type; /* Hack to propagate type info to channel_reconfigure() */
|
|
|
|
int
|
|
channel_reconfigure(struct channel *c, struct channel_config *cf)
|
|
{
|
|
/* Touched by reconfiguration */
|
|
c->stale = 0;
|
|
|
|
/* FIXME: better handle these changes, also handle in_keep_filtered */
|
|
if ((c->table != cf->table->table) || (cf->ra_mode && (c->ra_mode != cf->ra_mode)))
|
|
return 0;
|
|
|
|
/* Note that filter_same() requires arguments in (new, old) order */
|
|
int import_changed = !filter_same(cf->in_filter, c->in_filter);
|
|
int export_changed = !filter_same(cf->out_filter, c->out_filter);
|
|
int rpki_reload_changed = (cf->rpki_reload != c->rpki_reload);
|
|
|
|
if (c->preference != cf->preference)
|
|
import_changed = 1;
|
|
|
|
if (c->merge_limit != cf->merge_limit)
|
|
export_changed = 1;
|
|
|
|
/* Reconfigure channel fields */
|
|
c->in_filter = cf->in_filter;
|
|
c->out_filter = cf->out_filter;
|
|
c->rx_limit = cf->rx_limit;
|
|
c->in_limit = cf->in_limit;
|
|
c->out_limit = cf->out_limit;
|
|
|
|
// c->ra_mode = cf->ra_mode;
|
|
c->merge_limit = cf->merge_limit;
|
|
c->preference = cf->preference;
|
|
c->debug = cf->debug;
|
|
c->in_keep_filtered = cf->in_keep_filtered;
|
|
c->rpki_reload = cf->rpki_reload;
|
|
|
|
channel_verify_limits(c);
|
|
|
|
/* Execute channel-specific reconfigure hook */
|
|
if (c->channel->reconfigure && !c->channel->reconfigure(c, cf, &import_changed, &export_changed))
|
|
return 0;
|
|
|
|
/* If the channel is not open, it has no routes and we cannot reload it anyways */
|
|
if (c->channel_state != CS_UP)
|
|
goto done;
|
|
|
|
/* Update RPKI/ROA subscriptions */
|
|
if (import_changed || export_changed || rpki_reload_changed)
|
|
{
|
|
channel_roa_unsubscribe_all(c);
|
|
|
|
if (c->rpki_reload)
|
|
{
|
|
channel_roa_subscribe_filter(c, 1);
|
|
channel_roa_subscribe_filter(c, 0);
|
|
}
|
|
}
|
|
|
|
if (reconfigure_type == RECONFIG_SOFT)
|
|
{
|
|
if (import_changed)
|
|
log(L_INFO "Channel %s.%s changed import", c->proto->name, c->name);
|
|
|
|
if (export_changed)
|
|
log(L_INFO "Channel %s.%s changed export", c->proto->name, c->name);
|
|
|
|
goto done;
|
|
}
|
|
|
|
/* Route reload may be not supported */
|
|
if (import_changed && !channel_reloadable(c))
|
|
return 0;
|
|
|
|
if (import_changed || export_changed)
|
|
log(L_INFO "Reloading channel %s.%s", c->proto->name, c->name);
|
|
|
|
if (import_changed)
|
|
channel_request_reload(c);
|
|
|
|
if (export_changed)
|
|
channel_request_feeding(c);
|
|
|
|
done:
|
|
CD(c, "Reconfigured");
|
|
return 1;
|
|
}
|
|
|
|
|
|
int
|
|
proto_configure_channel(struct proto *p, struct channel **pc, struct channel_config *cf)
|
|
{
|
|
struct channel *c = *pc;
|
|
|
|
if (!c && cf)
|
|
{
|
|
/* We could add the channel, but currently it would just stay in down state
|
|
until protocol is restarted, so it is better to force restart anyways. */
|
|
if (p->proto_state != PS_DOWN)
|
|
{
|
|
log(L_INFO "Cannot add channel %s.%s", p->name, cf->name);
|
|
return 0;
|
|
}
|
|
|
|
*pc = proto_add_channel(p, cf);
|
|
}
|
|
else if (c && !cf)
|
|
{
|
|
if (c->channel_state != CS_DOWN)
|
|
{
|
|
log(L_INFO "Cannot remove channel %s.%s", c->proto->name, c->name);
|
|
return 0;
|
|
}
|
|
|
|
proto_remove_channel(p, c);
|
|
*pc = NULL;
|
|
}
|
|
else if (c && cf)
|
|
{
|
|
if (!channel_reconfigure(c, cf))
|
|
{
|
|
log(L_INFO "Cannot reconfigure channel %s.%s", c->proto->name, c->name);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
/**
|
|
* proto_setup_mpls_map - automatically setup FEC map for protocol
|
|
* @p: affected protocol
|
|
* @rts: RTS_* value for generated MPLS routes
|
|
* @hooks: whether to update rte_insert / rte_remove hooks
|
|
*
|
|
* Add, remove or reconfigure MPLS FEC map of the protocol @p, depends on
|
|
* whether MPLS channel exists, and setup rte_insert / rte_remove hooks with
|
|
* default MPLS handlers. It is a convenience function supposed to be called
|
|
* from the protocol start and configure hooks, after reconfiguration of
|
|
* channels. For shutdown, use proto_shutdown_mpls_map(). If caller uses its own
|
|
* rte_insert / rte_remove hooks, it is possible to disable updating hooks and
|
|
* doing that manually.
|
|
*/
|
|
void
|
|
proto_setup_mpls_map(struct proto *p, uint rts, int hooks)
|
|
{
|
|
struct mpls_fec_map *m = p->mpls_map;
|
|
struct channel *c = p->mpls_channel;
|
|
|
|
if (!m && c)
|
|
{
|
|
/*
|
|
* Note that when called from a protocol start hook, it is called before
|
|
* mpls_channel_start(). But FEC map locks MPLS domain internally so it does
|
|
* not depend on lock from MPLS channel.
|
|
*/
|
|
p->mpls_map = mpls_fec_map_new(p->pool, c, rts);
|
|
}
|
|
else if (m && !c)
|
|
{
|
|
/*
|
|
* Note that for reconfiguration, it is called after the MPLS channel has
|
|
* been already removed. But removal of active MPLS channel would trigger
|
|
* protocol restart anyways.
|
|
*/
|
|
mpls_fec_map_free(m);
|
|
p->mpls_map = NULL;
|
|
}
|
|
else if (m && c)
|
|
{
|
|
mpls_fec_map_reconfigure(m, c);
|
|
}
|
|
|
|
if (hooks)
|
|
{
|
|
p->rte_insert = p->mpls_map ? mpls_rte_insert : NULL;
|
|
p->rte_remove = p->mpls_map ? mpls_rte_remove : NULL;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* proto_shutdown_mpls_map - automatically shutdown FEC map for protocol
|
|
* @p: affected protocol
|
|
* @hooks: whether to update rte_insert / rte_remove hooks
|
|
*
|
|
* Remove MPLS FEC map of the protocol @p during protocol shutdown.
|
|
*/
|
|
void
|
|
proto_shutdown_mpls_map(struct proto *p, int hooks)
|
|
{
|
|
struct mpls_fec_map *m = p->mpls_map;
|
|
|
|
if (!m)
|
|
return;
|
|
|
|
mpls_fec_map_free(m);
|
|
p->mpls_map = NULL;
|
|
|
|
if (hooks)
|
|
{
|
|
p->rte_insert = NULL;
|
|
p->rte_remove = NULL;
|
|
}
|
|
}
|
|
|
|
static void
|
|
proto_event(void *ptr)
|
|
{
|
|
struct proto *p = ptr;
|
|
|
|
if (p->do_start)
|
|
{
|
|
if_feed_baby(p);
|
|
p->do_start = 0;
|
|
}
|
|
|
|
if (p->do_stop)
|
|
{
|
|
if (p->proto == &proto_unix_iface)
|
|
if_flush_ifaces(p);
|
|
p->do_stop = 0;
|
|
}
|
|
|
|
if (proto_is_done(p))
|
|
{
|
|
if (p->proto->cleanup)
|
|
p->proto->cleanup(p);
|
|
|
|
p->active = 0;
|
|
proto_log_state_change(p);
|
|
proto_rethink_goal(p);
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* proto_new - create a new protocol instance
|
|
* @c: protocol configuration
|
|
*
|
|
* When a new configuration has been read in, the core code starts
|
|
* initializing all the protocol instances configured by calling their
|
|
* init() hooks with the corresponding instance configuration. The initialization
|
|
* code of the protocol is expected to create a new instance according to the
|
|
* configuration by calling this function and then modifying the default settings
|
|
* to values wanted by the protocol.
|
|
*/
|
|
void *
|
|
proto_new(struct proto_config *cf)
|
|
{
|
|
struct proto *p = mb_allocz(proto_pool, cf->protocol->proto_size);
|
|
|
|
p->cf = cf;
|
|
p->debug = cf->debug;
|
|
p->mrtdump = cf->mrtdump;
|
|
p->name = cf->name;
|
|
p->proto = cf->protocol;
|
|
p->net_type = cf->net_type;
|
|
p->disabled = cf->disabled;
|
|
p->hash_key = random_u32();
|
|
cf->proto = p;
|
|
|
|
init_list(&p->channels);
|
|
|
|
return p;
|
|
}
|
|
|
|
static struct proto *
|
|
proto_init(struct proto_config *c, node *n)
|
|
{
|
|
struct protocol *pr = c->protocol;
|
|
struct proto *p = pr->init(c);
|
|
|
|
p->proto_state = PS_DOWN;
|
|
p->last_state_change = current_time();
|
|
p->vrf = c->vrf;
|
|
p->vrf_set = c->vrf_set;
|
|
insert_node(&p->n, n);
|
|
|
|
p->event = ev_new_init(proto_pool, proto_event, p);
|
|
|
|
PD(p, "Initializing%s", p->disabled ? " [disabled]" : "");
|
|
|
|
return p;
|
|
}
|
|
|
|
static void
|
|
proto_start(struct proto *p)
|
|
{
|
|
/* Here we cannot use p->cf->name since it won't survive reconfiguration */
|
|
p->pool = rp_new(proto_pool, p->proto->name);
|
|
|
|
if (graceful_restart_state == GRS_INIT)
|
|
p->gr_recovery = 1;
|
|
}
|
|
|
|
|
|
/**
|
|
* proto_config_new - create a new protocol configuration
|
|
* @pr: protocol the configuration will belong to
|
|
* @class: SYM_PROTO or SYM_TEMPLATE
|
|
*
|
|
* Whenever the configuration file says that a new instance
|
|
* of a routing protocol should be created, the parser calls
|
|
* proto_config_new() to create a configuration entry for this
|
|
* instance (a structure staring with the &proto_config header
|
|
* containing all the generic items followed by protocol-specific
|
|
* ones). Also, the configuration entry gets added to the list
|
|
* of protocol instances kept in the configuration.
|
|
*
|
|
* The function is also used to create protocol templates (when class
|
|
* SYM_TEMPLATE is specified), the only difference is that templates
|
|
* are not added to the list of protocol instances and therefore not
|
|
* initialized during protos_commit()).
|
|
*/
|
|
void *
|
|
proto_config_new(struct protocol *pr, int class)
|
|
{
|
|
struct proto_config *cf = cfg_allocz(pr->config_size);
|
|
|
|
if (class == SYM_PROTO)
|
|
add_tail(&new_config->protos, &cf->n);
|
|
|
|
cf->global = new_config;
|
|
cf->protocol = pr;
|
|
cf->name = pr->name;
|
|
cf->class = class;
|
|
cf->debug = new_config->proto_default_debug;
|
|
cf->mrtdump = new_config->proto_default_mrtdump;
|
|
|
|
init_list(&cf->channels);
|
|
|
|
return cf;
|
|
}
|
|
|
|
|
|
/**
|
|
* proto_copy_config - copy a protocol configuration
|
|
* @dest: destination protocol configuration
|
|
* @src: source protocol configuration
|
|
*
|
|
* Whenever a new instance of a routing protocol is created from the
|
|
* template, proto_copy_config() is called to copy a content of
|
|
* the source protocol configuration to the new protocol configuration.
|
|
* Name, class and a node in protos list of @dest are kept intact.
|
|
* copy_config() protocol hook is used to copy protocol-specific data.
|
|
*/
|
|
void
|
|
proto_copy_config(struct proto_config *dest, struct proto_config *src)
|
|
{
|
|
struct channel_config *cc;
|
|
node old_node;
|
|
int old_class;
|
|
const char *old_name;
|
|
|
|
if (dest->protocol != src->protocol)
|
|
cf_error("Can't copy configuration from a different protocol type");
|
|
|
|
if (dest->protocol->copy_config == NULL)
|
|
cf_error("Inheriting configuration for %s is not supported", src->protocol->name);
|
|
|
|
DBG("Copying configuration from %s to %s\n", src->name, dest->name);
|
|
|
|
/*
|
|
* Copy struct proto_config here. Keep original node, class and name.
|
|
* protocol-specific config copy is handled by protocol copy_config() hook
|
|
*/
|
|
|
|
old_node = dest->n;
|
|
old_class = dest->class;
|
|
old_name = dest->name;
|
|
|
|
memcpy(dest, src, src->protocol->config_size);
|
|
|
|
dest->n = old_node;
|
|
dest->class = old_class;
|
|
dest->name = old_name;
|
|
init_list(&dest->channels);
|
|
|
|
WALK_LIST(cc, src->channels)
|
|
channel_copy_config(cc, dest);
|
|
|
|
/* FIXME: allow for undefined copy_config */
|
|
dest->protocol->copy_config(dest, src);
|
|
}
|
|
|
|
void
|
|
proto_clone_config(struct symbol *sym, struct proto_config *parent)
|
|
{
|
|
struct proto_config *cf = proto_config_new(parent->protocol, SYM_PROTO);
|
|
proto_copy_config(cf, parent);
|
|
cf->name = sym->name;
|
|
cf->proto = NULL;
|
|
cf->parent = parent;
|
|
|
|
sym->class = cf->class;
|
|
sym->proto = cf;
|
|
}
|
|
|
|
static void
|
|
proto_undef_clone(struct symbol *sym, struct proto_config *cf)
|
|
{
|
|
rem_node(&cf->n);
|
|
|
|
sym->class = SYM_VOID;
|
|
sym->proto = NULL;
|
|
}
|
|
|
|
/**
|
|
* protos_preconfig - pre-configuration processing
|
|
* @c: new configuration
|
|
*
|
|
* This function calls the preconfig() hooks of all routing
|
|
* protocols available to prepare them for reading of the new
|
|
* configuration.
|
|
*/
|
|
void
|
|
protos_preconfig(struct config *c)
|
|
{
|
|
struct protocol *p;
|
|
|
|
init_list(&c->protos);
|
|
DBG("Protocol preconfig:");
|
|
WALK_LIST(p, protocol_list)
|
|
{
|
|
DBG(" %s", p->name);
|
|
p->name_counter = 0;
|
|
if (p->preconfig)
|
|
p->preconfig(p, c);
|
|
}
|
|
DBG("\n");
|
|
}
|
|
|
|
static int
|
|
proto_reconfigure(struct proto *p, struct proto_config *oc, struct proto_config *nc, int type)
|
|
{
|
|
/* If the protocol is DOWN, we just restart it */
|
|
if (p->proto_state == PS_DOWN)
|
|
return 0;
|
|
|
|
/* If there is a too big change in core attributes, ... */
|
|
if ((nc->protocol != oc->protocol) ||
|
|
(nc->net_type != oc->net_type) ||
|
|
(nc->disabled != p->disabled) ||
|
|
(nc->vrf != oc->vrf) ||
|
|
(nc->vrf_set != oc->vrf_set))
|
|
return 0;
|
|
|
|
p->name = nc->name;
|
|
p->debug = nc->debug;
|
|
p->mrtdump = nc->mrtdump;
|
|
reconfigure_type = type;
|
|
|
|
/* Execute protocol specific reconfigure hook */
|
|
if (!p->proto->reconfigure || !p->proto->reconfigure(p, nc))
|
|
return 0;
|
|
|
|
DBG("\t%s: same\n", oc->name);
|
|
PD(p, "Reconfigured");
|
|
p->cf = nc;
|
|
|
|
return 1;
|
|
}
|
|
|
|
/**
|
|
* protos_commit - commit new protocol configuration
|
|
* @new: new configuration
|
|
* @old: old configuration or %NULL if it's boot time config
|
|
* @force_reconfig: force restart of all protocols (used for example
|
|
* when the router ID changes)
|
|
* @type: type of reconfiguration (RECONFIG_SOFT or RECONFIG_HARD)
|
|
*
|
|
* Scan differences between @old and @new configuration and adjust all
|
|
* protocol instances to conform to the new configuration.
|
|
*
|
|
* When a protocol exists in the new configuration, but it doesn't in the
|
|
* original one, it's immediately started. When a collision with the other
|
|
* running protocol would arise, the new protocol will be temporarily stopped
|
|
* by the locking mechanism.
|
|
*
|
|
* When a protocol exists in the old configuration, but it doesn't in the
|
|
* new one, it's shut down and deleted after the shutdown completes.
|
|
*
|
|
* When a protocol exists in both configurations, the core decides
|
|
* whether it's possible to reconfigure it dynamically - it checks all
|
|
* the core properties of the protocol (changes in filters are ignored
|
|
* if type is RECONFIG_SOFT) and if they match, it asks the
|
|
* reconfigure() hook of the protocol to see if the protocol is able
|
|
* to switch to the new configuration. If it isn't possible, the
|
|
* protocol is shut down and a new instance is started with the new
|
|
* configuration after the shutdown is completed.
|
|
*/
|
|
void
|
|
protos_commit(struct config *new, struct config *old, int force_reconfig, int type)
|
|
{
|
|
struct proto_config *oc, *nc;
|
|
struct symbol *sym;
|
|
struct proto *p;
|
|
node *n;
|
|
|
|
|
|
DBG("protos_commit:\n");
|
|
if (old)
|
|
{
|
|
WALK_LIST(oc, old->protos)
|
|
{
|
|
p = oc->proto;
|
|
sym = cf_find_symbol(new, oc->name);
|
|
|
|
/* Handle dynamic protocols */
|
|
if (!sym && oc->parent && !new->shutdown)
|
|
{
|
|
struct symbol *parsym = cf_find_symbol(new, oc->parent->name);
|
|
if (parsym && parsym->class == SYM_PROTO)
|
|
{
|
|
/* This is hack, we would like to share config, but we need to copy it now */
|
|
new_config = new;
|
|
cfg_mem = new->mem;
|
|
new->current_scope = new->root_scope;
|
|
sym = cf_get_symbol(new, oc->name);
|
|
proto_clone_config(sym, parsym->proto);
|
|
new_config = NULL;
|
|
cfg_mem = NULL;
|
|
}
|
|
}
|
|
|
|
if (sym && sym->class == SYM_PROTO && !new->shutdown)
|
|
{
|
|
/* Found match, let's check if we can smoothly switch to new configuration */
|
|
/* No need to check description */
|
|
nc = sym->proto;
|
|
nc->proto = p;
|
|
|
|
/* We will try to reconfigure protocol p */
|
|
if (! force_reconfig && proto_reconfigure(p, oc, nc, type))
|
|
continue;
|
|
|
|
if (nc->parent)
|
|
{
|
|
proto_undef_clone(sym, nc);
|
|
goto remove;
|
|
}
|
|
|
|
/* Unsuccessful, we will restart it */
|
|
if (!p->disabled && !nc->disabled)
|
|
log(L_INFO "Restarting protocol %s", p->name);
|
|
else if (p->disabled && !nc->disabled)
|
|
log(L_INFO "Enabling protocol %s", p->name);
|
|
else if (!p->disabled && nc->disabled)
|
|
log(L_INFO "Disabling protocol %s", p->name);
|
|
|
|
p->down_code = nc->disabled ? PDC_CF_DISABLE : PDC_CF_RESTART;
|
|
p->cf_new = nc;
|
|
}
|
|
else if (!new->shutdown)
|
|
{
|
|
remove:
|
|
log(L_INFO "Removing protocol %s", p->name);
|
|
p->down_code = PDC_CF_REMOVE;
|
|
p->cf_new = NULL;
|
|
}
|
|
else if (new->gr_down)
|
|
{
|
|
p->down_code = PDC_CMD_GR_DOWN;
|
|
p->cf_new = NULL;
|
|
}
|
|
else /* global shutdown */
|
|
{
|
|
p->down_code = PDC_CMD_SHUTDOWN;
|
|
p->cf_new = NULL;
|
|
}
|
|
|
|
p->reconfiguring = 1;
|
|
config_add_obstacle(old);
|
|
proto_rethink_goal(p);
|
|
}
|
|
}
|
|
|
|
struct proto *first_dev_proto = NULL;
|
|
|
|
n = NODE &(proto_list.head);
|
|
WALK_LIST(nc, new->protos)
|
|
if (!nc->proto)
|
|
{
|
|
/* Not a first-time configuration */
|
|
if (old)
|
|
log(L_INFO "Adding protocol %s", nc->name);
|
|
|
|
p = proto_init(nc, n);
|
|
n = NODE p;
|
|
|
|
if (p->proto == &proto_unix_iface)
|
|
first_dev_proto = p;
|
|
}
|
|
else
|
|
n = NODE nc->proto;
|
|
|
|
DBG("Protocol start\n");
|
|
|
|
/* Start device protocol first */
|
|
if (first_dev_proto)
|
|
proto_rethink_goal(first_dev_proto);
|
|
|
|
/* Determine router ID for the first time - it has to be here and not in
|
|
global_commit() because it is postponed after start of device protocol */
|
|
if (!config->router_id)
|
|
{
|
|
config->router_id = if_choose_router_id(config->router_id_from, 0);
|
|
if (!config->router_id)
|
|
die("Cannot determine router ID, please configure it manually");
|
|
}
|
|
|
|
/* Start all new protocols */
|
|
WALK_LIST_DELSAFE(p, n, proto_list)
|
|
proto_rethink_goal(p);
|
|
}
|
|
|
|
static void
|
|
proto_rethink_goal(struct proto *p)
|
|
{
|
|
struct protocol *q;
|
|
byte goal;
|
|
|
|
if (p->reconfiguring && !p->active)
|
|
{
|
|
struct proto_config *nc = p->cf_new;
|
|
node *n = p->n.prev;
|
|
DBG("%s has shut down for reconfiguration\n", p->name);
|
|
p->cf->proto = NULL;
|
|
config_del_obstacle(p->cf->global);
|
|
proto_remove_channels(p);
|
|
rem_node(&p->n);
|
|
rfree(p->event);
|
|
mb_free(p->message);
|
|
mb_free(p);
|
|
if (!nc)
|
|
return;
|
|
p = proto_init(nc, n);
|
|
}
|
|
|
|
/* Determine what state we want to reach */
|
|
if (p->disabled || p->reconfiguring)
|
|
goal = PS_DOWN;
|
|
else
|
|
goal = PS_UP;
|
|
|
|
q = p->proto;
|
|
if (goal == PS_UP)
|
|
{
|
|
if (!p->active)
|
|
{
|
|
/* Going up */
|
|
DBG("Kicking %s up\n", p->name);
|
|
PD(p, "Starting");
|
|
proto_start(p);
|
|
proto_notify_state(p, (q->start ? q->start(p) : PS_UP));
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (p->proto_state == PS_START || p->proto_state == PS_UP)
|
|
{
|
|
/* Going down */
|
|
DBG("Kicking %s down\n", p->name);
|
|
PD(p, "Shutting down");
|
|
proto_notify_state(p, (q->shutdown ? q->shutdown(p) : PS_DOWN));
|
|
}
|
|
}
|
|
}
|
|
|
|
struct proto *
|
|
proto_spawn(struct proto_config *cf, uint disabled)
|
|
{
|
|
struct proto *p = proto_init(cf, TAIL(proto_list));
|
|
p->disabled = disabled;
|
|
proto_rethink_goal(p);
|
|
return p;
|
|
}
|
|
|
|
|
|
/**
|
|
* DOC: Graceful restart recovery
|
|
*
|
|
* Graceful restart of a router is a process when the routing plane (e.g. BIRD)
|
|
* restarts but both the forwarding plane (e.g kernel routing table) and routing
|
|
* neighbors keep proper routes, and therefore uninterrupted packet forwarding
|
|
* is maintained.
|
|
*
|
|
* BIRD implements graceful restart recovery by deferring export of routes to
|
|
* protocols until routing tables are refilled with the expected content. After
|
|
* start, protocols generate routes as usual, but routes are not propagated to
|
|
* them, until protocols report that they generated all routes. After that,
|
|
* graceful restart recovery is finished and the export (and the initial feed)
|
|
* to protocols is enabled.
|
|
*
|
|
* When graceful restart recovery need is detected during initialization, then
|
|
* enabled protocols are marked with @gr_recovery flag before start. Such
|
|
* protocols then decide how to proceed with graceful restart, participation is
|
|
* voluntary. Protocols could lock the recovery for each channel by function
|
|
* channel_graceful_restart_lock() (state stored in @gr_lock flag), which means
|
|
* that they want to postpone the end of the recovery until they converge and
|
|
* then unlock it. They also could set @gr_wait before advancing to %PS_UP,
|
|
* which means that the core should defer route export to that channel until
|
|
* the end of the recovery. This should be done by protocols that expect their
|
|
* neigbors to keep the proper routes (kernel table, BGP sessions with BGP
|
|
* graceful restart capability).
|
|
*
|
|
* The graceful restart recovery is finished when either all graceful restart
|
|
* locks are unlocked or when graceful restart wait timer fires.
|
|
*
|
|
*/
|
|
|
|
static void graceful_restart_done(timer *t);
|
|
|
|
/**
|
|
* graceful_restart_recovery - request initial graceful restart recovery
|
|
*
|
|
* Called by the platform initialization code if the need for recovery
|
|
* after graceful restart is detected during boot. Have to be called
|
|
* before protos_commit().
|
|
*/
|
|
void
|
|
graceful_restart_recovery(void)
|
|
{
|
|
graceful_restart_state = GRS_INIT;
|
|
}
|
|
|
|
/**
|
|
* graceful_restart_init - initialize graceful restart
|
|
*
|
|
* When graceful restart recovery was requested, the function starts an active
|
|
* phase of the recovery and initializes graceful restart wait timer. The
|
|
* function have to be called after protos_commit().
|
|
*/
|
|
void
|
|
graceful_restart_init(void)
|
|
{
|
|
if (!graceful_restart_state)
|
|
return;
|
|
|
|
log(L_INFO "Graceful restart started");
|
|
|
|
if (!graceful_restart_locks)
|
|
{
|
|
graceful_restart_done(NULL);
|
|
return;
|
|
}
|
|
|
|
graceful_restart_state = GRS_ACTIVE;
|
|
gr_wait_timer = tm_new_init(proto_pool, graceful_restart_done, NULL, 0, 0);
|
|
tm_start(gr_wait_timer, config->gr_wait S);
|
|
}
|
|
|
|
/**
|
|
* graceful_restart_done - finalize graceful restart
|
|
* @t: unused
|
|
*
|
|
* When there are no locks on graceful restart, the functions finalizes the
|
|
* graceful restart recovery. Protocols postponing route export until the end of
|
|
* the recovery are awakened and the export to them is enabled. All other
|
|
* related state is cleared. The function is also called when the graceful
|
|
* restart wait timer fires (but there are still some locks).
|
|
*/
|
|
static void
|
|
graceful_restart_done(timer *t UNUSED)
|
|
{
|
|
log(L_INFO "Graceful restart done");
|
|
graceful_restart_state = GRS_DONE;
|
|
|
|
struct proto *p;
|
|
WALK_LIST(p, proto_list)
|
|
{
|
|
if (!p->gr_recovery)
|
|
continue;
|
|
|
|
struct channel *c;
|
|
WALK_LIST(c, p->channels)
|
|
{
|
|
/* Resume postponed export of routes */
|
|
if ((c->channel_state == CS_UP) && c->gr_wait && c->proto->rt_notify)
|
|
channel_start_export(c);
|
|
|
|
/* Cleanup */
|
|
c->gr_wait = 0;
|
|
c->gr_lock = 0;
|
|
}
|
|
|
|
p->gr_recovery = 0;
|
|
}
|
|
|
|
graceful_restart_locks = 0;
|
|
}
|
|
|
|
void
|
|
graceful_restart_show_status(void)
|
|
{
|
|
if (graceful_restart_state != GRS_ACTIVE)
|
|
return;
|
|
|
|
cli_msg(-24, "Graceful restart recovery in progress");
|
|
cli_msg(-24, " Waiting for %d channels to recover", graceful_restart_locks);
|
|
cli_msg(-24, " Wait timer is %t/%u", tm_remains(gr_wait_timer), config->gr_wait);
|
|
}
|
|
|
|
/**
|
|
* channel_graceful_restart_lock - lock graceful restart by channel
|
|
* @p: channel instance
|
|
*
|
|
* This function allows a protocol to postpone the end of graceful restart
|
|
* recovery until it converges. The lock is removed when the protocol calls
|
|
* channel_graceful_restart_unlock() or when the channel is closed.
|
|
*
|
|
* The function have to be called during the initial phase of graceful restart
|
|
* recovery and only for protocols that are part of graceful restart (i.e. their
|
|
* @gr_recovery is set), which means it should be called from protocol start
|
|
* hooks.
|
|
*/
|
|
void
|
|
channel_graceful_restart_lock(struct channel *c)
|
|
{
|
|
ASSERT(graceful_restart_state == GRS_INIT);
|
|
ASSERT(c->proto->gr_recovery);
|
|
|
|
if (c->gr_lock)
|
|
return;
|
|
|
|
c->gr_lock = 1;
|
|
graceful_restart_locks++;
|
|
}
|
|
|
|
/**
|
|
* channel_graceful_restart_unlock - unlock graceful restart by channel
|
|
* @p: channel instance
|
|
*
|
|
* This function unlocks a lock from channel_graceful_restart_lock(). It is also
|
|
* automatically called when the lock holding protocol went down.
|
|
*/
|
|
void
|
|
channel_graceful_restart_unlock(struct channel *c)
|
|
{
|
|
if (!c->gr_lock)
|
|
return;
|
|
|
|
c->gr_lock = 0;
|
|
graceful_restart_locks--;
|
|
|
|
if ((graceful_restart_state == GRS_ACTIVE) && !graceful_restart_locks)
|
|
tm_start(gr_wait_timer, 0);
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
* protos_dump_all - dump status of all protocols
|
|
*
|
|
* This function dumps status of all existing protocol instances to the
|
|
* debug output. It involves printing of general status information
|
|
* such as protocol states, its position on the protocol lists
|
|
* and also calling of a dump() hook of the protocol to print
|
|
* the internals.
|
|
*/
|
|
void
|
|
protos_dump_all(void)
|
|
{
|
|
debug("Protocols:\n");
|
|
|
|
struct proto *p;
|
|
WALK_LIST(p, proto_list)
|
|
{
|
|
debug(" protocol %s state %s\n", p->name, p_states[p->proto_state]);
|
|
|
|
struct channel *c;
|
|
WALK_LIST(c, p->channels)
|
|
{
|
|
debug("\tTABLE %s\n", c->table->name);
|
|
if (c->in_filter)
|
|
debug("\tInput filter: %s\n", filter_name(c->in_filter));
|
|
if (c->out_filter)
|
|
debug("\tOutput filter: %s\n", filter_name(c->out_filter));
|
|
}
|
|
|
|
if (p->proto->dump && (p->proto_state != PS_DOWN))
|
|
p->proto->dump(p);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* proto_build - make a single protocol available
|
|
* @p: the protocol
|
|
*
|
|
* After the platform specific initialization code uses protos_build()
|
|
* to add all the standard protocols, it should call proto_build() for
|
|
* all platform specific protocols to inform the core that they exist.
|
|
*/
|
|
void
|
|
proto_build(struct protocol *p)
|
|
{
|
|
add_tail(&protocol_list, &p->n);
|
|
ASSERT(p->class);
|
|
ASSERT(!class_to_protocol[p->class]);
|
|
class_to_protocol[p->class] = p;
|
|
}
|
|
|
|
/* FIXME: convert this call to some protocol hook */
|
|
extern void bfd_init_all(void);
|
|
|
|
void protos_build_gen(void);
|
|
|
|
/**
|
|
* protos_build - build a protocol list
|
|
*
|
|
* This function is called during BIRD startup to insert
|
|
* all standard protocols to the global protocol list. Insertion
|
|
* of platform specific protocols (such as the kernel syncer)
|
|
* is in the domain of competence of the platform dependent
|
|
* startup code.
|
|
*/
|
|
void
|
|
protos_build(void)
|
|
{
|
|
protos_build_gen();
|
|
|
|
proto_pool = rp_new(&root_pool, "Protocols");
|
|
proto_shutdown_timer = tm_new(proto_pool);
|
|
proto_shutdown_timer->hook = proto_shutdown_loop;
|
|
}
|
|
|
|
|
|
/* Temporary hack to propagate restart to BGP */
|
|
int proto_restart;
|
|
|
|
static void
|
|
proto_shutdown_loop(timer *t UNUSED)
|
|
{
|
|
struct proto *p, *p_next;
|
|
|
|
WALK_LIST_DELSAFE(p, p_next, proto_list)
|
|
if (p->down_sched)
|
|
{
|
|
proto_restart = (p->down_sched == PDS_RESTART);
|
|
|
|
p->disabled = 1;
|
|
proto_rethink_goal(p);
|
|
if (proto_restart)
|
|
{
|
|
p->disabled = 0;
|
|
proto_rethink_goal(p);
|
|
}
|
|
}
|
|
}
|
|
|
|
static inline void
|
|
proto_schedule_down(struct proto *p, byte restart, byte code)
|
|
{
|
|
/* Does not work for other states (even PS_START) */
|
|
ASSERT(p->proto_state == PS_UP);
|
|
|
|
/* Scheduled restart may change to shutdown, but not otherwise */
|
|
if (p->down_sched == PDS_DISABLE)
|
|
return;
|
|
|
|
p->down_sched = restart ? PDS_RESTART : PDS_DISABLE;
|
|
p->down_code = code;
|
|
tm_start_max(proto_shutdown_timer, restart ? 250 MS : 0);
|
|
}
|
|
|
|
/**
|
|
* proto_set_message - set administrative message to protocol
|
|
* @p: protocol
|
|
* @msg: message
|
|
* @len: message length (-1 for NULL-terminated string)
|
|
*
|
|
* The function sets administrative message (string) related to protocol state
|
|
* change. It is called by the nest code for manual enable/disable/restart
|
|
* commands all routes to the protocol, and by protocol-specific code when the
|
|
* protocol state change is initiated by the protocol. Using NULL message clears
|
|
* the last message. The message string may be either NULL-terminated or with an
|
|
* explicit length.
|
|
*/
|
|
void
|
|
proto_set_message(struct proto *p, char *msg, int len)
|
|
{
|
|
mb_free(p->message);
|
|
p->message = NULL;
|
|
|
|
if (!msg || !len)
|
|
return;
|
|
|
|
if (len < 0)
|
|
len = strlen(msg);
|
|
|
|
if (!len)
|
|
return;
|
|
|
|
p->message = mb_alloc(proto_pool, len + 1);
|
|
memcpy(p->message, msg, len);
|
|
p->message[len] = 0;
|
|
}
|
|
|
|
|
|
static const char *
|
|
channel_limit_name(struct channel_limit *l)
|
|
{
|
|
const char *actions[] = {
|
|
[PLA_WARN] = "warn",
|
|
[PLA_BLOCK] = "block",
|
|
[PLA_RESTART] = "restart",
|
|
[PLA_DISABLE] = "disable",
|
|
};
|
|
|
|
return actions[l->action];
|
|
}
|
|
|
|
/**
|
|
* channel_notify_limit: notify about limit hit and take appropriate action
|
|
* @c: channel
|
|
* @l: limit being hit
|
|
* @dir: limit direction (PLD_*)
|
|
* @rt_count: the number of routes
|
|
*
|
|
* The function is called by the route processing core when limit @l
|
|
* is breached. It activates the limit and tooks appropriate action
|
|
* according to @l->action.
|
|
*/
|
|
void
|
|
channel_notify_limit(struct channel *c, struct channel_limit *l, int dir, u32 rt_count)
|
|
{
|
|
const char *dir_name[PLD_MAX] = { "receive", "import" , "export" };
|
|
const byte dir_down[PLD_MAX] = { PDC_RX_LIMIT_HIT, PDC_IN_LIMIT_HIT, PDC_OUT_LIMIT_HIT };
|
|
struct proto *p = c->proto;
|
|
|
|
if (l->state == PLS_BLOCKED)
|
|
return;
|
|
|
|
/* For warning action, we want the log message every time we hit the limit */
|
|
if (!l->state || ((l->action == PLA_WARN) && (rt_count == l->limit)))
|
|
log(L_WARN "Protocol %s hits route %s limit (%d), action: %s",
|
|
p->name, dir_name[dir], l->limit, channel_limit_name(l));
|
|
|
|
switch (l->action)
|
|
{
|
|
case PLA_WARN:
|
|
l->state = PLS_ACTIVE;
|
|
break;
|
|
|
|
case PLA_BLOCK:
|
|
l->state = PLS_BLOCKED;
|
|
break;
|
|
|
|
case PLA_RESTART:
|
|
case PLA_DISABLE:
|
|
l->state = PLS_BLOCKED;
|
|
if (p->proto_state == PS_UP)
|
|
proto_schedule_down(p, l->action == PLA_RESTART, dir_down[dir]);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
channel_verify_limits(struct channel *c)
|
|
{
|
|
struct channel_limit *l;
|
|
u32 all_routes = c->stats.imp_routes + c->stats.filt_routes;
|
|
|
|
l = &c->rx_limit;
|
|
if (l->action && (all_routes > l->limit))
|
|
channel_notify_limit(c, l, PLD_RX, all_routes);
|
|
|
|
l = &c->in_limit;
|
|
if (l->action && (c->stats.imp_routes > l->limit))
|
|
channel_notify_limit(c, l, PLD_IN, c->stats.imp_routes);
|
|
|
|
l = &c->out_limit;
|
|
if (l->action && (c->stats.exp_routes > l->limit))
|
|
channel_notify_limit(c, l, PLD_OUT, c->stats.exp_routes);
|
|
}
|
|
|
|
static inline void
|
|
channel_reset_limit(struct channel_limit *l)
|
|
{
|
|
if (l->action)
|
|
l->state = PLS_INITIAL;
|
|
}
|
|
|
|
static inline void
|
|
proto_do_start(struct proto *p)
|
|
{
|
|
p->active = 1;
|
|
p->do_start = 1;
|
|
ev_schedule(p->event);
|
|
}
|
|
|
|
static void
|
|
proto_do_up(struct proto *p)
|
|
{
|
|
if (!p->main_source)
|
|
{
|
|
p->main_source = rt_get_source(p, 0);
|
|
rt_lock_source(p->main_source);
|
|
}
|
|
|
|
proto_start_channels(p);
|
|
}
|
|
|
|
static inline void
|
|
proto_do_pause(struct proto *p)
|
|
{
|
|
proto_pause_channels(p);
|
|
}
|
|
|
|
static void
|
|
proto_do_stop(struct proto *p)
|
|
{
|
|
p->down_sched = 0;
|
|
p->gr_recovery = 0;
|
|
|
|
p->do_stop = 1;
|
|
ev_schedule(p->event);
|
|
|
|
if (p->main_source)
|
|
{
|
|
rt_unlock_source(p->main_source);
|
|
p->main_source = NULL;
|
|
}
|
|
|
|
proto_stop_channels(p);
|
|
}
|
|
|
|
static void
|
|
proto_do_down(struct proto *p)
|
|
{
|
|
p->down_code = 0;
|
|
neigh_prune();
|
|
rfree(p->pool);
|
|
p->pool = NULL;
|
|
|
|
/* Shutdown is finished in the protocol event */
|
|
if (proto_is_done(p))
|
|
ev_schedule(p->event);
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
* proto_notify_state - notify core about protocol state change
|
|
* @p: protocol the state of which has changed
|
|
* @ps: the new status
|
|
*
|
|
* Whenever a state of a protocol changes due to some event internal
|
|
* to the protocol (i.e., not inside a start() or shutdown() hook),
|
|
* it should immediately notify the core about the change by calling
|
|
* proto_notify_state() which will write the new state to the &proto
|
|
* structure and take all the actions necessary to adapt to the new
|
|
* state. State change to PS_DOWN immediately frees resources of protocol
|
|
* and might execute start callback of protocol; therefore,
|
|
* it should be used at tail positions of protocol callbacks.
|
|
*/
|
|
void
|
|
proto_notify_state(struct proto *p, uint state)
|
|
{
|
|
uint ps = p->proto_state;
|
|
|
|
DBG("%s reporting state transition %s -> %s\n", p->name, p_states[ps], p_states[state]);
|
|
if (state == ps)
|
|
return;
|
|
|
|
p->proto_state = state;
|
|
p->last_state_change = current_time();
|
|
|
|
switch (state)
|
|
{
|
|
case PS_START:
|
|
ASSERT(ps == PS_DOWN || ps == PS_UP);
|
|
|
|
if (ps == PS_DOWN)
|
|
proto_do_start(p);
|
|
else
|
|
proto_do_pause(p);
|
|
break;
|
|
|
|
case PS_UP:
|
|
ASSERT(ps == PS_DOWN || ps == PS_START);
|
|
|
|
if (ps == PS_DOWN)
|
|
proto_do_start(p);
|
|
|
|
proto_do_up(p);
|
|
break;
|
|
|
|
case PS_STOP:
|
|
ASSERT(ps == PS_START || ps == PS_UP);
|
|
|
|
proto_do_stop(p);
|
|
break;
|
|
|
|
case PS_DOWN:
|
|
if (ps != PS_STOP)
|
|
proto_do_stop(p);
|
|
|
|
proto_do_down(p);
|
|
break;
|
|
|
|
default:
|
|
bug("%s: Invalid state %d", p->name, ps);
|
|
}
|
|
|
|
proto_log_state_change(p);
|
|
}
|
|
|
|
/*
|
|
* CLI Commands
|
|
*/
|
|
|
|
static char *
|
|
proto_state_name(struct proto *p)
|
|
{
|
|
switch (p->proto_state)
|
|
{
|
|
case PS_DOWN: return p->active ? "flush" : "down";
|
|
case PS_START: return "start";
|
|
case PS_UP: return "up";
|
|
case PS_STOP: return "stop";
|
|
default: return "???";
|
|
}
|
|
}
|
|
|
|
static void
|
|
channel_show_stats(struct channel *c)
|
|
{
|
|
struct proto_stats *s = &c->stats;
|
|
|
|
if (c->in_keep_filtered)
|
|
cli_msg(-1006, " Routes: %u imported, %u filtered, %u exported, %u preferred",
|
|
s->imp_routes, s->filt_routes, s->exp_routes, s->pref_routes);
|
|
else
|
|
cli_msg(-1006, " Routes: %u imported, %u exported, %u preferred",
|
|
s->imp_routes, s->exp_routes, s->pref_routes);
|
|
|
|
cli_msg(-1006, " Route change stats: received rejected filtered ignored accepted");
|
|
cli_msg(-1006, " Import updates: %10u %10u %10u %10u %10u",
|
|
s->imp_updates_received, s->imp_updates_invalid,
|
|
s->imp_updates_filtered, s->imp_updates_ignored,
|
|
s->imp_updates_accepted);
|
|
cli_msg(-1006, " Import withdraws: %10u %10u --- %10u %10u",
|
|
s->imp_withdraws_received, s->imp_withdraws_invalid,
|
|
s->imp_withdraws_ignored, s->imp_withdraws_accepted);
|
|
cli_msg(-1006, " Export updates: %10u %10u %10u --- %10u",
|
|
s->exp_updates_received, s->exp_updates_rejected,
|
|
s->exp_updates_filtered, s->exp_updates_accepted);
|
|
cli_msg(-1006, " Export withdraws: %10u --- --- --- %10u",
|
|
s->exp_withdraws_received, s->exp_withdraws_accepted);
|
|
}
|
|
|
|
void
|
|
channel_show_limit(struct channel_limit *l, const char *dsc)
|
|
{
|
|
if (!l->action)
|
|
return;
|
|
|
|
cli_msg(-1006, " %-16s%d%s", dsc, l->limit, l->state ? " [HIT]" : "");
|
|
cli_msg(-1006, " Action: %s", channel_limit_name(l));
|
|
}
|
|
|
|
void
|
|
channel_show_info(struct channel *c)
|
|
{
|
|
cli_msg(-1006, " Channel %s", c->name);
|
|
cli_msg(-1006, " State: %s", c_states[c->channel_state]);
|
|
cli_msg(-1006, " Table: %s", c->table->name);
|
|
cli_msg(-1006, " Preference: %d", c->preference);
|
|
cli_msg(-1006, " Input filter: %s", filter_name(c->in_filter));
|
|
cli_msg(-1006, " Output filter: %s", filter_name(c->out_filter));
|
|
|
|
if (graceful_restart_state == GRS_ACTIVE)
|
|
cli_msg(-1006, " GR recovery: %s%s",
|
|
c->gr_lock ? " pending" : "",
|
|
c->gr_wait ? " waiting" : "");
|
|
|
|
channel_show_limit(&c->rx_limit, "Receive limit:");
|
|
channel_show_limit(&c->in_limit, "Import limit:");
|
|
channel_show_limit(&c->out_limit, "Export limit:");
|
|
|
|
if (c->channel_state != CS_DOWN)
|
|
channel_show_stats(c);
|
|
}
|
|
|
|
void
|
|
channel_cmd_debug(struct channel *c, uint mask)
|
|
{
|
|
if (cli_access_restricted())
|
|
return;
|
|
|
|
c->debug = mask;
|
|
cli_msg(0, "");
|
|
}
|
|
|
|
void
|
|
proto_cmd_show(struct proto *p, uintptr_t verbose, int cnt)
|
|
{
|
|
byte buf[256], tbuf[TM_DATETIME_BUFFER_SIZE];
|
|
|
|
/* First protocol - show header */
|
|
if (!cnt)
|
|
cli_msg(-2002, "%-10s %-10s %-10s %-6s %-12s %s",
|
|
"Name", "Proto", "Table", "State", "Since", "Info");
|
|
|
|
buf[0] = 0;
|
|
if (p->proto->get_status)
|
|
p->proto->get_status(p, buf);
|
|
tm_format_time(tbuf, &config->tf_proto, p->last_state_change);
|
|
cli_msg(-1002, "%-10s %-10s %-10s %-6s %-12s %s",
|
|
p->name,
|
|
p->proto->name,
|
|
p->main_channel ? p->main_channel->table->name : "---",
|
|
proto_state_name(p),
|
|
tbuf,
|
|
buf);
|
|
|
|
if (verbose)
|
|
{
|
|
if (p->cf->dsc)
|
|
cli_msg(-1006, " Description: %s", p->cf->dsc);
|
|
if (p->message)
|
|
cli_msg(-1006, " Message: %s", p->message);
|
|
if (p->cf->router_id)
|
|
cli_msg(-1006, " Router ID: %R", p->cf->router_id);
|
|
if (p->vrf_set)
|
|
cli_msg(-1006, " VRF: %s", p->vrf ? p->vrf->name : "default");
|
|
|
|
if (p->proto->show_proto_info)
|
|
p->proto->show_proto_info(p);
|
|
else
|
|
{
|
|
struct channel *c;
|
|
WALK_LIST(c, p->channels)
|
|
channel_show_info(c);
|
|
}
|
|
|
|
cli_msg(-1006, "");
|
|
}
|
|
}
|
|
|
|
void
|
|
proto_cmd_disable(struct proto *p, uintptr_t arg, int cnt UNUSED)
|
|
{
|
|
if (p->disabled)
|
|
{
|
|
cli_msg(-8, "%s: already disabled", p->name);
|
|
return;
|
|
}
|
|
|
|
log(L_INFO "Disabling protocol %s", p->name);
|
|
p->disabled = 1;
|
|
p->down_code = PDC_CMD_DISABLE;
|
|
proto_set_message(p, (char *) arg, -1);
|
|
proto_rethink_goal(p);
|
|
cli_msg(-9, "%s: disabled", p->name);
|
|
}
|
|
|
|
void
|
|
proto_cmd_enable(struct proto *p, uintptr_t arg, int cnt UNUSED)
|
|
{
|
|
if (!p->disabled)
|
|
{
|
|
cli_msg(-10, "%s: already enabled", p->name);
|
|
return;
|
|
}
|
|
|
|
log(L_INFO "Enabling protocol %s", p->name);
|
|
p->disabled = 0;
|
|
proto_set_message(p, (char *) arg, -1);
|
|
proto_rethink_goal(p);
|
|
cli_msg(-11, "%s: enabled", p->name);
|
|
}
|
|
|
|
void
|
|
proto_cmd_restart(struct proto *p, uintptr_t arg, int cnt UNUSED)
|
|
{
|
|
if (p->disabled)
|
|
{
|
|
cli_msg(-8, "%s: already disabled", p->name);
|
|
return;
|
|
}
|
|
|
|
log(L_INFO "Restarting protocol %s", p->name);
|
|
p->disabled = 1;
|
|
p->down_code = PDC_CMD_RESTART;
|
|
proto_set_message(p, (char *) arg, -1);
|
|
proto_rethink_goal(p);
|
|
p->disabled = 0;
|
|
proto_rethink_goal(p);
|
|
cli_msg(-12, "%s: restarted", p->name);
|
|
}
|
|
|
|
void
|
|
proto_cmd_reload(struct proto *p, uintptr_t dir, int cnt UNUSED)
|
|
{
|
|
struct channel *c;
|
|
|
|
if (p->disabled)
|
|
{
|
|
cli_msg(-8, "%s: already disabled", p->name);
|
|
return;
|
|
}
|
|
|
|
/* If the protocol in not UP, it has no routes */
|
|
if (p->proto_state != PS_UP)
|
|
return;
|
|
|
|
/* All channels must support reload */
|
|
if (dir != CMD_RELOAD_OUT)
|
|
WALK_LIST(c, p->channels)
|
|
if ((c->channel_state == CS_UP) && !channel_reloadable(c))
|
|
{
|
|
cli_msg(-8006, "%s: reload failed", p->name);
|
|
return;
|
|
}
|
|
|
|
log(L_INFO "Reloading protocol %s", p->name);
|
|
|
|
/* re-importing routes */
|
|
if (dir != CMD_RELOAD_OUT)
|
|
WALK_LIST(c, p->channels)
|
|
if (c->channel_state == CS_UP)
|
|
channel_request_reload(c);
|
|
|
|
/* re-exporting routes */
|
|
if (dir != CMD_RELOAD_IN)
|
|
WALK_LIST(c, p->channels)
|
|
if (c->channel_state == CS_UP)
|
|
channel_request_feeding(c);
|
|
|
|
cli_msg(-15, "%s: reloading", p->name);
|
|
}
|
|
|
|
extern void pipe_update_debug(struct proto *P);
|
|
|
|
void
|
|
proto_cmd_debug(struct proto *p, uintptr_t mask, int cnt UNUSED)
|
|
{
|
|
p->debug = mask;
|
|
|
|
#ifdef CONFIG_PIPE
|
|
if (p->proto == &proto_pipe)
|
|
pipe_update_debug(p);
|
|
#endif
|
|
}
|
|
|
|
void
|
|
proto_cmd_mrtdump(struct proto *p, uintptr_t mask, int cnt UNUSED)
|
|
{
|
|
p->mrtdump = mask;
|
|
}
|
|
|
|
static void
|
|
proto_apply_cmd_symbol(const struct symbol *s, void (* cmd)(struct proto *, uintptr_t, int), uintptr_t arg)
|
|
{
|
|
if (s->class != SYM_PROTO)
|
|
{
|
|
cli_msg(9002, "%s is not a protocol", s->name);
|
|
return;
|
|
}
|
|
|
|
if (s->proto->proto)
|
|
{
|
|
cmd(s->proto->proto, arg, 0);
|
|
cli_msg(0, "");
|
|
}
|
|
else
|
|
cli_msg(9002, "%s does not exist", s->name);
|
|
}
|
|
|
|
static void
|
|
proto_apply_cmd_patt(const char *patt, void (* cmd)(struct proto *, uintptr_t, int), uintptr_t arg)
|
|
{
|
|
struct proto *p;
|
|
int cnt = 0;
|
|
|
|
WALK_LIST(p, proto_list)
|
|
if (!patt || patmatch(patt, p->name))
|
|
cmd(p, arg, cnt++);
|
|
|
|
if (!cnt)
|
|
cli_msg(8003, "No protocols match");
|
|
else
|
|
cli_msg(0, "");
|
|
}
|
|
|
|
void
|
|
proto_apply_cmd(struct proto_spec ps, void (* cmd)(struct proto *, uintptr_t, int),
|
|
int restricted, uintptr_t arg)
|
|
{
|
|
if (restricted && cli_access_restricted())
|
|
return;
|
|
|
|
if (ps.patt)
|
|
proto_apply_cmd_patt(ps.ptr, cmd, arg);
|
|
else
|
|
proto_apply_cmd_symbol(ps.ptr, cmd, arg);
|
|
}
|
|
|
|
struct proto *
|
|
proto_get_named(struct symbol *sym, struct protocol *pr)
|
|
{
|
|
struct proto *p, *q;
|
|
|
|
if (sym)
|
|
{
|
|
if (sym->class != SYM_PROTO)
|
|
cf_error("%s: Not a protocol", sym->name);
|
|
|
|
p = sym->proto->proto;
|
|
if (!p || p->proto != pr)
|
|
cf_error("%s: Not a %s protocol", sym->name, pr->name);
|
|
}
|
|
else
|
|
{
|
|
p = NULL;
|
|
WALK_LIST(q, proto_list)
|
|
if ((q->proto == pr) && (q->proto_state != PS_DOWN))
|
|
{
|
|
if (p)
|
|
cf_error("There are multiple %s protocols running", pr->name);
|
|
p = q;
|
|
}
|
|
if (!p)
|
|
cf_error("There is no %s protocol running", pr->name);
|
|
}
|
|
|
|
return p;
|
|
}
|
|
|
|
struct proto *
|
|
proto_iterate_named(struct symbol *sym, struct protocol *proto, struct proto *old)
|
|
{
|
|
if (sym)
|
|
{
|
|
/* Just the first pass */
|
|
if (old)
|
|
{
|
|
cli_msg(0, "");
|
|
return NULL;
|
|
}
|
|
|
|
if (sym->class != SYM_PROTO)
|
|
cf_error("%s: Not a protocol", sym->name);
|
|
|
|
struct proto *p = sym->proto->proto;
|
|
if (!p || (p->proto != proto))
|
|
cf_error("%s: Not a %s protocol", sym->name, proto->name);
|
|
|
|
return p;
|
|
}
|
|
else
|
|
{
|
|
for (struct proto *p = !old ? HEAD(proto_list) : NODE_NEXT(old);
|
|
NODE_VALID(p);
|
|
p = NODE_NEXT(p))
|
|
{
|
|
if ((p->proto == proto) && (p->proto_state != PS_DOWN))
|
|
{
|
|
cli_separator(this_cli);
|
|
return p;
|
|
}
|
|
}
|
|
|
|
/* Not found anything during first pass */
|
|
if (!old)
|
|
cf_error("There is no %s protocol running", proto->name);
|
|
|
|
/* No more items */
|
|
cli_msg(0, "");
|
|
return NULL;
|
|
}
|
|
}
|