From e04555c04545278cfe3aeae85d707b1d78e5abeb Mon Sep 17 00:00:00 2001 From: Ondrej Zajicek Date: Tue, 17 Nov 2009 15:45:05 +0100 Subject: Implement description field of protocol. --- nest/proto.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'nest/proto.c') diff --git a/nest/proto.c b/nest/proto.c index 7bb1286d..c05db767 100644 --- a/nest/proto.c +++ b/nest/proto.c @@ -307,6 +307,7 @@ protos_commit(struct config *new, struct config *old, int force_reconfig, int ty 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->def; if (!force_reconfig && nc->protocol == oc->protocol @@ -702,6 +703,8 @@ proto_do_show(struct proto *p, int verbose) buf); if (verbose) { + if (p->cf->dsc) + cli_msg(-1006, " Description: %s", p->cf->dsc); cli_msg(-1006, " Preference: %d", p->preference); cli_msg(-1006, " Input filter: %s", filter_name(p->in_filter)); cli_msg(-1006, " Output filter: %s", filter_name(p->out_filter)); -- cgit v1.2.3 From bf47fe4b2e40ccfcfe6af2d86548d06cdf9739c5 Mon Sep 17 00:00:00 2001 From: Ondrej Zajicek Date: Thu, 26 Nov 2009 20:47:59 +0100 Subject: Implements BGP route refresh. --- doc/bird.sgml | 16 ++++++++++--- nest/config.Y | 7 ++++++ nest/proto.c | 67 ++++++++++++++++++++++++++++++++++++++++++++++++----- nest/protocol.h | 9 +++++++ nest/rt-table.c | 14 +++++++++++ proto/bgp/bgp.c | 12 ++++++++++ proto/bgp/bgp.h | 3 +++ proto/bgp/config.Y | 4 +++- proto/bgp/packets.c | 65 +++++++++++++++++++++++++++++++++++++++++++++++++++ 9 files changed, 187 insertions(+), 10 deletions(-) (limited to 'nest/proto.c') diff --git a/doc/bird.sgml b/doc/bird.sgml index 9e74470f..d08b0c17 100644 --- a/doc/bird.sgml +++ b/doc/bird.sgml @@ -482,9 +482,6 @@ This argument can be omitted if there exists only a single instance. number of networks, number of routes before and after filtering). If you use enable|disable|restart - Enable, disable or restart a given protocol instance, instances matching the or configure [soft] [" Reload configuration from a given file. BIRD will smoothly switch itself to the new configuration, protocols are @@ -496,6 +493,9 @@ This argument can be omitted if there exists only a single instance. but new routes would be processed according to the new filters. + enable|disable|restart + Enable, disable or restart a given protocol instance, instances matching the or enable route refresh When BGP speaker + changes its import filter, it has to re-examine all routes + received from its neighbor against the new filter. As these + routes might not be available, there is a BGP protocol + extension Route Refresh (specified in RFC 2918) that allows + BGP speaker to request re-advertisment of all routes from its + neighbor. This option specifies whether BIRD advertises this + capability and accepts such requests. Even when disabled, BIRD + can send route refresh requests. Default: on. + enable as4 BGP protocol was designed to use 2B AS numbers and was extended later to allow 4B AS number. BIRD supports 4B AS extension, but by disabling this option it can be persuaded not to advertise it and diff --git a/nest/config.Y b/nest/config.Y index 3d6f1548..dde20c5a 100644 --- a/nest/config.Y +++ b/nest/config.Y @@ -45,6 +45,7 @@ CF_KEYWORDS(INTERFACE, IMPORT, EXPORT, FILTER, NONE, TABLE, STATES, ROUTES, FILT CF_KEYWORDS(PASSWORD, FROM, PASSIVE, TO, ID, EVENTS, PACKETS, PROTOCOLS, INTERFACES) CF_KEYWORDS(PRIMARY, STATS, COUNT, FOR, COMMANDS, PREEXPORT, GENERATE) CF_KEYWORDS(LISTEN, BGP, V6ONLY, ADDRESS, PORT, PASSWORDS, DESCRIPTION) +CF_KEYWORDS(RELOAD, REFEED) CF_ENUM(T_ENUM_RTS, RTS_, DUMMY, STATIC, INHERIT, DEVICE, STATIC_DEVICE, REDIRECT, RIP, OSPF, OSPF_IA, OSPF_EXT1, OSPF_EXT2, BGP, PIPE) @@ -442,6 +443,12 @@ CF_CLI(ENABLE, proto_patt, | \"\" | all, [[Enable protocol]] { proto_xxable($2, 1); } ; CF_CLI(RESTART, proto_patt, | \"\" | all, [[Restart protocol]]) { proto_xxable($2, 2); } ; +CF_CLI(RELOAD, proto_patt, | \"\" | all, [[Reload protocol]]) +{ proto_xxable($2, 3); } ; +CF_CLI(REFEED, proto_patt, | \"\" | all, [[Refeed protocol BROKEN]]) +{ proto_xxable($2, 4); } ; + + CF_CLI_HELP(DEBUG, ..., [[Control protocol debugging]]) CF_CLI(DEBUG, proto_patt debug_mask, ( | | all) (all | off | { states | routes | filters | events | packets }), [[Control protocol debugging]]) diff --git a/nest/proto.c b/nest/proto.c index c05db767..c531d869 100644 --- a/nest/proto.c +++ b/nest/proto.c @@ -73,6 +73,10 @@ proto_relink(struct proto *p) rem_node(&p->n); switch (p->core_state) { + case FS_HUNGRY: + l = &inactive_proto_list; + break; + case FS_FEEDING: case FS_HAPPY: l = &active_proto_list; break; @@ -80,7 +84,7 @@ proto_relink(struct proto *p) l = &flush_proto_list; break; default: - l = &inactive_proto_list; + ASSERT(0); } proto_enqueue(l, p); } @@ -549,7 +553,7 @@ proto_feed_more(void *P) } static void -proto_feed(void *P) +proto_feed_initial(void *P) { struct proto *p = P; @@ -577,15 +581,44 @@ proto_schedule_flush(struct proto *p) } static void -proto_schedule_feed(struct proto *p) +proto_schedule_feed(struct proto *p, int initial) { DBG("%s: Scheduling meal\n", p->name); p->core_state = FS_FEEDING; proto_relink(p); - p->attn->hook = proto_feed; + p->attn->hook = initial ? proto_feed_initial : proto_feed_more; ev_schedule(p->attn); } +/** + * proto_request_feeding - request feeding routes to the protocol + * @p: given protocol + * + * Sometimes it is needed to send again all routes to the + * protocol. This is called feeding and can be requested by this + * function. This would cause protocol core state transition + * to FS_FEEDING (during feeding) and when completed, it will + * switch back to FS_HAPPY. This function can be called even + * when feeding is already running, in that case it is restarted. + */ +void +proto_request_feeding(struct proto *p) +{ + ASSERT(p->proto_state == PS_UP); + + /* If we are already feeding, we want to restart it */ + if (p->core_state == FS_FEEDING) + { + /* Unless feeding is in initial state */ + if (p->attn->hook == proto_feed_initial) + return; + + rt_feed_baby_abort(p); + } + + proto_schedule_feed(p, 0); +} + /** * proto_notify_state - notify core about protocol state change * @p: protocol the state of which has changed @@ -635,7 +668,7 @@ proto_notify_state(struct proto *p, unsigned ps) case PS_UP: ASSERT(ops == PS_DOWN || ops == PS_START); ASSERT(cs == FS_HUNGRY); - proto_schedule_feed(p); + proto_schedule_feed(p, 1); break; case PS_STOP: if ((cs = FS_FEEDING) || (cs == FS_HAPPY)) @@ -798,6 +831,7 @@ proto_xxable(char *pattern, int xx) { cli_msg(-9, "%s: disabled", p->name); p->disabled = 1; + proto_rethink_goal(p); } break; case 1: @@ -807,6 +841,7 @@ proto_xxable(char *pattern, int xx) { cli_msg(-11, "%s: enabled", p->name); p->disabled = 0; + proto_rethink_goal(p); } break; case 2: @@ -817,13 +852,33 @@ proto_xxable(char *pattern, int xx) p->disabled = 1; proto_rethink_goal(p); p->disabled = 0; + proto_rethink_goal(p); cli_msg(-12, "%s: restarted", p->name); } break; + case 3: + // FIXME change msg number + if (p->disabled) + cli_msg(-8, "%s: already disabled", p->name); + else if (p->reload_routes && p->reload_routes(p)) + cli_msg(-12, "%s: reloading", p->name); + else + cli_msg(-12, "%s: reload failed", p->name); + break; + case 4: + // FIXME change msg number + if (p->disabled) + cli_msg(-8, "%s: already disabled", p->name); + else + { + proto_request_feeding(p); + cli_msg(-12, "%s: reexport failed", p->name); + } + break; + default: ASSERT(0); } - proto_rethink_goal(p); } WALK_PROTO_LIST_END; if (!cnt) diff --git a/nest/protocol.h b/nest/protocol.h index 807b579f..66e6c43d 100644 --- a/nest/protocol.h +++ b/nest/protocol.h @@ -152,6 +152,9 @@ struct proto { * It can construct a new rte, add private attributes and * decide whether the route shall be imported: 1=yes, -1=no, * 0=process it through the import filter set by the user. + * reload_routes Request protocol to reload all its routes to the core + * (using rte_update()). Returns: 0=reload cannot be done, + * 1= reload is scheduled and will happen (asynchronously). */ void (*if_notify)(struct proto *, unsigned flags, struct iface *i); @@ -161,6 +164,7 @@ struct proto { struct ea_list *(*make_tmp_attrs)(struct rte *rt, struct linpool *pool); void (*store_tmp_attrs)(struct rte *rt, struct ea_list *attrs); int (*import_control)(struct proto *, struct rte **rt, struct ea_list **attrs, struct linpool *pool); + int (*reload_routes)(struct proto *); /* * Routing entry hooks (called only for rte's belonging to this protocol): @@ -190,6 +194,7 @@ struct proto { void *proto_new(struct proto_config *, unsigned size); void *proto_config_new(struct protocol *, unsigned size); +void proto_request_feeding(struct proto *p); void proto_show(struct symbol *, int); struct proto *proto_get_named(struct symbol *, struct protocol *); void proto_xxable(char *, int); @@ -271,6 +276,10 @@ void proto_notify_state(struct proto *p, unsigned state); * HUNGRY/DOWN --> HUNGRY/START --> HUNGRY/UP --> * FEEDING/UP --> HAPPY/UP --> FLUSHING/STOP|DOWN --> * HUNGRY/STOP|DOWN --> HUNGRY/DOWN + * + * Sometimes, protocol might switch from HAPPY/UP to FEEDING/UP + * if it wants to refeed the routes (for example BGP does so + * as a result of received ROUTE-REFRESH request). */ #define FS_HUNGRY 0 diff --git a/nest/rt-table.c b/nest/rt-table.c index dda0e56b..e0cd7971 100644 --- a/nest/rt-table.c +++ b/nest/rt-table.c @@ -199,6 +199,14 @@ do_rte_announce(struct announce_hook *a, int type, net *net, rte *new, rte *old, else p->stats.exp_withdraws_received++; + /* This is a tricky part - we don't know whether route 'old' was + exported to protocol 'p' or was filtered by the export filter. + We try tu run the export filter to know this to have a correct + value in 'old' argument of rt_update (and proper filter value) + + FIXME - this is broken because 'configure soft' may change + filters but keep routes */ + if (old) { if (p->out_filter == FILTER_REJECT) @@ -216,6 +224,7 @@ do_rte_announce(struct announce_hook *a, int type, net *net, rte *new, rte *old, } } + /* FIXME - This is broken because of incorrect 'old' value (see above) */ if (!new && !old) return; @@ -1122,6 +1131,11 @@ rt_show_net(struct cli *c, net *n, struct rt_show_data *d) ok = 0; else if (!ic && d->export_mode > 1) { + /* FIXME - this shows what should be exported according + to current filters, but not what was really exported. + 'configure soft' command may change the export filter + and do not update routes */ + if (p1->out_filter == FILTER_REJECT || p1->out_filter && f_run(p1->out_filter, &e, &tmpa, rte_update_pool, FF_FORCE_TMPATTR) > F_ACCEPT) ok = 0; diff --git a/proto/bgp/bgp.c b/proto/bgp/bgp.c index cde02768..24cd2023 100644 --- a/proto/bgp/bgp.c +++ b/proto/bgp/bgp.c @@ -676,6 +676,17 @@ bgp_neigh_notify(neighbor *n) } } +static int +bgp_reload_routes(struct proto *P) +{ + struct bgp_proto *p = (struct bgp_proto *) P; + if (!p->conn || !p->conn->peer_refresh_support) + return 0; + + bgp_schedule_packet(p->conn, PKT_ROUTE_REFRESH); + return 1; +} + static void bgp_start_locked(struct object_lock *lock) { @@ -792,6 +803,7 @@ bgp_init(struct proto_config *C) P->rte_better = bgp_rte_better; P->import_control = bgp_import_control; P->neigh_notify = bgp_neigh_notify; + P->reload_routes = bgp_reload_routes; p->cf = c; p->local_as = c->local_as; p->remote_as = c->remote_as; diff --git a/proto/bgp/bgp.h b/proto/bgp/bgp.h index c4d03352..59ec9c16 100644 --- a/proto/bgp/bgp.h +++ b/proto/bgp/bgp.h @@ -29,6 +29,7 @@ struct bgp_config { u32 default_local_pref; /* Default value for LOCAL_PREF attribute */ u32 default_med; /* Default value for MULTI_EXIT_DISC attribute */ int capabilities; /* Enable capability handshake [RFC3392] */ + int enable_refresh; /* Enable local support for route refresh [RFC2918] */ int enable_as4; /* Enable local support for 4B AS numbers [RFC4893] */ u32 rr_cluster_id; /* Route reflector cluster ID, if different from local ID */ int rr_client; /* Whether neighbor is RR client of me */ @@ -66,6 +67,7 @@ struct bgp_conn { int start_state; /* protocol start_state snapshot when connection established */ int want_as4_support; /* Connection tries to establish AS4 session */ int peer_as4_support; /* Peer supports 4B AS numbers [RFC4893] */ + int peer_refresh_support; /* Peer supports route refresh [RFC2918] */ unsigned hold_time, keepalive_time; /* Times calculated from my and neighbor's requirements */ }; @@ -202,6 +204,7 @@ void bgp_log_error(struct bgp_proto *p, u8 class, char *msg, unsigned code, unsi #define PKT_UPDATE 0x02 #define PKT_NOTIFICATION 0x03 #define PKT_KEEPALIVE 0x04 +#define PKT_ROUTE_REFRESH 0x05 #define PKT_SCHEDULE_CLOSE 0x1f /* Used internally to schedule socket close */ /* Attributes */ diff --git a/proto/bgp/config.Y b/proto/bgp/config.Y index 35769466..3c73d60e 100644 --- a/proto/bgp/config.Y +++ b/proto/bgp/config.Y @@ -23,7 +23,7 @@ CF_KEYWORDS(BGP, LOCAL, NEIGHBOR, AS, HOLD, TIME, CONNECT, RETRY, KEEPALIVE, BGP_ATOMIC_AGGR, BGP_AGGREGATOR, BGP_COMMUNITY, SOURCE, ADDRESS, PASSWORD, RR, RS, CLIENT, CLUSTER, ID, AS4, ADVERTISE, IPV4, CAPABILITIES, LIMIT, PASSIVE, PREFER, OLDER, MISSING, LLADDR, - DROP, IGNORE) + DROP, IGNORE, ROUTE, REFRESH) CF_GRAMMAR @@ -40,6 +40,7 @@ bgp_proto_start: proto_start BGP { BGP_CFG->error_amnesia_time = 300; BGP_CFG->error_delay_time_min = 60; BGP_CFG->error_delay_time_max = 300; + BGP_CFG->enable_refresh = 1; BGP_CFG->enable_as4 = bgp_as4_support; BGP_CFG->capabilities = 2; BGP_CFG->advertise_ipv4 = 1; @@ -77,6 +78,7 @@ bgp_proto: | bgp_proto ERROR FORGET TIME expr ';' { BGP_CFG->error_amnesia_time = $5; } | bgp_proto ERROR WAIT TIME expr ',' expr ';' { BGP_CFG->error_delay_time_min = $5; BGP_CFG->error_delay_time_max = $7; } | bgp_proto DISABLE AFTER ERROR bool ';' { BGP_CFG->disable_after_error = $5; } + | bgp_proto ENABLE ROUTE REFRESH bool ';' { BGP_CFG->enable_refresh = $5; } | bgp_proto ENABLE AS4 bool ';' { BGP_CFG->enable_as4 = $4; } | bgp_proto CAPABILITIES bool ';' { BGP_CFG->capabilities = $3; } | bgp_proto ADVERTISE IPV4 bool ';' { BGP_CFG->advertise_ipv4 = $4; } diff --git a/proto/bgp/packets.c b/proto/bgp/packets.c index 4176c9fe..91b47927 100644 --- a/proto/bgp/packets.c +++ b/proto/bgp/packets.c @@ -63,6 +63,14 @@ bgp_put_cap_ipv4(struct bgp_conn *conn UNUSED, byte *buf) } #endif +static byte * +bgp_put_cap_rr(struct bgp_conn *conn UNUSED, byte *buf) +{ + *buf++ = 2; /* Capability 2: Support for route refresh */ + *buf++ = 0; /* Capability data length */ + return buf; +} + static byte * bgp_put_cap_as4(struct bgp_conn *conn, byte *buf) { @@ -105,6 +113,9 @@ bgp_create_open(struct bgp_conn *conn, byte *buf) cap = bgp_put_cap_ipv6(conn, cap); #endif + if (p->cf->enable_refresh) + cap = bgp_put_cap_rr(conn, cap); + if (conn->want_as4_support) cap = bgp_put_cap_as4(conn, cap); @@ -386,6 +397,24 @@ bgp_create_update(struct bgp_conn *conn, byte *buf) #endif +static byte * +bgp_create_route_refresh(struct bgp_conn *conn, byte *buf) +{ + struct bgp_proto *p = conn->bgp; + BGP_TRACE(D_PACKETS, "Sending ROUTE-REFRESH"); + +#ifdef IPV6 + *buf++ = 0; /* AFI IPv6 */ + *buf++ = BGP_AF_IPV6; +#else + *buf++ = 0; /* AFI IPv4 */ + *buf++ = BGP_AF_IPV4; +#endif + *buf++ = 0; /* RFU */ + *buf++ = 1; /* and SAFI 1 */ + return buf; +} + static void bgp_create_header(byte *buf, unsigned int len, unsigned int type) { @@ -447,6 +476,12 @@ bgp_fire_tx(struct bgp_conn *conn) type = PKT_OPEN; end = bgp_create_open(conn, pkt); } + else if (s & (1 << PKT_ROUTE_REFRESH)) + { + s &= ~(1 << PKT_ROUTE_REFRESH); + type = PKT_ROUTE_REFRESH; + end = bgp_create_route_refresh(conn, pkt); + } else if (s & (1 << PKT_UPDATE)) { end = bgp_create_update(conn, pkt); @@ -517,6 +552,11 @@ bgp_parse_capabilities(struct bgp_conn *conn, byte *opt, int len) switch (opt[0]) { + case 2: + if (cl != 0) + goto err; + conn->peer_refresh_support = 1; + break; case 65: if (cl != 4) goto err; @@ -1084,6 +1124,30 @@ bgp_rx_keepalive(struct bgp_conn *conn) } } +static void +bgp_rx_route_refresh(struct bgp_conn *conn, byte *pkt, int len) +{ + struct bgp_proto *p = conn->bgp; + + BGP_TRACE(D_PACKETS, "Got ROUTE-REFRESH"); + + if (conn->state != BS_ESTABLISHED) + { bgp_error(conn, 5, 0, NULL, 0); return; } + + if (!p->cf->enable_refresh) + { bgp_error(conn, 1, 3, pkt+18, 1); return; } + + if (len != (BGP_HEADER_LENGTH + 4)) + { bgp_error(conn, 1, 2, pkt+16, 2); return; } + + /* FIXME - we ignore AFI/SAFI values, as we support + just one value and even an error code for an invalid + request is not defined */ + + proto_request_feeding(&p->p); +} + + /** * bgp_rx_packet - handle a received packet * @conn: BGP connection @@ -1103,6 +1167,7 @@ bgp_rx_packet(struct bgp_conn *conn, byte *pkt, unsigned len) case PKT_UPDATE: return bgp_rx_update(conn, pkt, len); case PKT_NOTIFICATION: return bgp_rx_notification(conn, pkt, len); case PKT_KEEPALIVE: return bgp_rx_keepalive(conn); + case PKT_ROUTE_REFRESH: return bgp_rx_route_refresh(conn, pkt, len); default: bgp_error(conn, 1, 3, pkt+18, 1); } } -- cgit v1.2.3 From 11361a101517c2c87e3d35d2c63cacb3ddb97724 Mon Sep 17 00:00:00 2001 From: Ondrej Zajicek Date: Wed, 2 Dec 2009 22:19:47 +0100 Subject: Implements route re-feed. This can be used to re-feed routes to protocol after soft change in export filters. --- nest/proto.c | 1 + nest/protocol.h | 1 + nest/rt-table.c | 36 ++++++++++++++++++++++++------------ 3 files changed, 26 insertions(+), 12 deletions(-) (limited to 'nest/proto.c') diff --git a/nest/proto.c b/nest/proto.c index c531d869..bdac4bf6 100644 --- a/nest/proto.c +++ b/nest/proto.c @@ -585,6 +585,7 @@ proto_schedule_feed(struct proto *p, int initial) { DBG("%s: Scheduling meal\n", p->name); p->core_state = FS_FEEDING; + p->refeeding = !initial; proto_relink(p); p->attn->hook = initial ? proto_feed_initial : proto_feed_more; ev_schedule(p->attn); diff --git a/nest/protocol.h b/nest/protocol.h index 66e6c43d..e1adc525 100644 --- a/nest/protocol.h +++ b/nest/protocol.h @@ -134,6 +134,7 @@ struct proto { unsigned core_state; /* Core state machine (see below) */ unsigned core_goal; /* State we want to reach (see below) */ unsigned reconfiguring; /* We're shutting down due to reconfiguration */ + unsigned refeeding; /* We are refeeding (valid only if core_state == FS_FEEDING) */ u32 hash_key; /* Random key used for hashing of neighbors */ bird_clock_t last_state_change; /* Time of last state transition */ char *last_state_name_announced; /* Last state name we've announced to the user */ diff --git a/nest/rt-table.c b/nest/rt-table.c index a8d0fee5..8efc0a61 100644 --- a/nest/rt-table.c +++ b/nest/rt-table.c @@ -158,7 +158,7 @@ rte_trace_out(unsigned int flag, struct proto *p, rte *e, char *msg) } static inline void -do_rte_announce(struct announce_hook *a, int type, net *net, rte *new, rte *old, ea_list *tmpa, int class) +do_rte_announce(struct announce_hook *a, int type, net *net, rte *new, rte *old, ea_list *tmpa, int class, int refeed) { struct proto *p = a->proto; rte *new0 = new; @@ -199,15 +199,27 @@ do_rte_announce(struct announce_hook *a, int type, net *net, rte *new, rte *old, else p->stats.exp_withdraws_received++; - /* This is a tricky part - we don't know whether route 'old' was - exported to protocol 'p' or was filtered by the export filter. - We try tu run the export filter to know this to have a correct - value in 'old' argument of rt_update (and proper filter value) - - FIXME - this is broken because 'configure soft' may change - filters but keep routes */ - - if (old) + /* + * This is a tricky part - we don't know whether route 'old' was + * exported to protocol 'p' or was filtered by the export filter. + * We try tu run the export filter to know this to have a correct + * value in 'old' argument of rt_update (and proper filter value) + * + * FIXME - this is broken because 'configure soft' may change + * filters but keep routes. Refeed is expected to be called after + * change of the filters and with old == new, therefore we do not + * even try to run the filter on an old route, This may lead to + * 'spurious withdraws' but ensure that there are no 'missing + * withdraws'. + * + * This is not completely safe as there is a window between + * reconfiguration and the end of refeed - if a newly filtered + * route disappears during this period, proper withdraw is not + * sent (because old would be also filtered) and the route is + * not refeeded (because it disappeared before that). + */ + + if (old && !refeed) { if (p->out_filter == FILTER_REJECT) old = NULL; @@ -313,7 +325,7 @@ rte_announce(rtable *tab, int type, net *net, rte *new, rte *old, ea_list *tmpa) { ASSERT(a->proto->core_state == FS_HAPPY || a->proto->core_state == FS_FEEDING); if (a->proto->accept_ra_types == type) - do_rte_announce(a, type, net, new, old, tmpa, class); + do_rte_announce(a, type, net, new, old, tmpa, class, 0); } } @@ -973,7 +985,7 @@ do_feed_baby(struct proto *p, int type, struct announce_hook *h, net *n, rte *e) rte_update_lock(); tmpa = q->make_tmp_attrs ? q->make_tmp_attrs(e, rte_update_pool) : NULL; - do_rte_announce(h, type, n, e, NULL, tmpa, ipa_classify(n->n.prefix)); + do_rte_announce(h, type, n, e, p->refeeding ? e : NULL, tmpa, ipa_classify(n->n.prefix), p->refeeding); rte_update_unlock(); } -- cgit v1.2.3 From a421ec33cb9029899122d0ab63bab0fa268348d2 Mon Sep 17 00:00:00 2001 From: Ondrej Zajicek Date: Wed, 2 Dec 2009 22:22:40 +0100 Subject: Fixes silly bug. --- nest/proto.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'nest/proto.c') diff --git a/nest/proto.c b/nest/proto.c index bdac4bf6..b23011d7 100644 --- a/nest/proto.c +++ b/nest/proto.c @@ -649,7 +649,7 @@ proto_notify_state(struct proto *p, unsigned ps) switch (ps) { case PS_DOWN: - if ((cs = FS_FEEDING) || (cs == FS_HAPPY)) + if ((cs == FS_FEEDING) || (cs == FS_HAPPY)) proto_schedule_flush(p); neigh_prune(); // FIXME convert neighbors to resource? @@ -672,7 +672,7 @@ proto_notify_state(struct proto *p, unsigned ps) proto_schedule_feed(p, 1); break; case PS_STOP: - if ((cs = FS_FEEDING) || (cs == FS_HAPPY)) + if ((cs == FS_FEEDING) || (cs == FS_HAPPY)) proto_schedule_flush(p); break; default: -- cgit v1.2.3 From 8a7fb8858fa87bce6f2f15ee2bbb77704b5fff4e Mon Sep 17 00:00:00 2001 From: Ondrej Zajicek Date: Mon, 14 Dec 2009 01:32:37 +0100 Subject: Finishes 'route reload' feature. --- doc/bird.sgml | 18 ++++++++++++++++++ doc/reply_codes | 3 +++ nest/config.Y | 18 +++++++++--------- nest/proto.c | 48 ++++++++++++++++++++++++++++++------------------ nest/protocol.h | 7 +++++++ nest/rt-table.c | 12 +++++++++++- 6 files changed, 78 insertions(+), 28 deletions(-) (limited to 'nest/proto.c') diff --git a/doc/bird.sgml b/doc/bird.sgml index 1f494cce..3905a29e 100644 --- a/doc/bird.sgml +++ b/doc/bird.sgml @@ -497,6 +497,24 @@ This argument can be omitted if there exists only a single instance. enable|disable|restart Enable, disable or restart a given protocol instance, instances matching the or reload [in|out] + + Reload a given protocol instance, that means re-import routes + from the protocol instance and re-export preferred routes to + the instance. If cannot dump +8006 Reload failed 9000 Command too long 9001 Parse error diff --git a/nest/config.Y b/nest/config.Y index dde20c5a..dbb10ada 100644 --- a/nest/config.Y +++ b/nest/config.Y @@ -45,7 +45,7 @@ CF_KEYWORDS(INTERFACE, IMPORT, EXPORT, FILTER, NONE, TABLE, STATES, ROUTES, FILT CF_KEYWORDS(PASSWORD, FROM, PASSIVE, TO, ID, EVENTS, PACKETS, PROTOCOLS, INTERFACES) CF_KEYWORDS(PRIMARY, STATS, COUNT, FOR, COMMANDS, PREEXPORT, GENERATE) CF_KEYWORDS(LISTEN, BGP, V6ONLY, ADDRESS, PORT, PASSWORDS, DESCRIPTION) -CF_KEYWORDS(RELOAD, REFEED) +CF_KEYWORDS(RELOAD, IN, OUT) CF_ENUM(T_ENUM_RTS, RTS_, DUMMY, STATIC, INHERIT, DEVICE, STATIC_DEVICE, REDIRECT, RIP, OSPF, OSPF_IA, OSPF_EXT1, OSPF_EXT2, BGP, PIPE) @@ -438,17 +438,17 @@ echo_size: ; CF_CLI(DISABLE, proto_patt, | \"\" | all, [[Disable protocol]]) -{ proto_xxable($2, 0); } ; +{ proto_xxable($2, XX_DISABLE); } ; CF_CLI(ENABLE, proto_patt, | \"\" | all, [[Enable protocol]]) -{ proto_xxable($2, 1); } ; +{ proto_xxable($2, XX_ENABLE); } ; CF_CLI(RESTART, proto_patt, | \"\" | all, [[Restart protocol]]) -{ proto_xxable($2, 2); } ; +{ proto_xxable($2, XX_RESTART); } ; CF_CLI(RELOAD, proto_patt, | \"\" | all, [[Reload protocol]]) -{ proto_xxable($2, 3); } ; -CF_CLI(REFEED, proto_patt, | \"\" | all, [[Refeed protocol BROKEN]]) -{ proto_xxable($2, 4); } ; - - +{ proto_xxable($2, XX_RELOAD); } ; +CF_CLI(RELOAD IN, proto_patt, | \"\" | all, [[Reload protocol (just imported routes)]]) +{ proto_xxable($3, XX_RELOAD_IN); } ; +CF_CLI(RELOAD OUT, proto_patt, | \"\" | all, [[Reload protocol (just exported routes)]]) +{ proto_xxable($3, XX_RELOAD_OUT); } ; CF_CLI_HELP(DEBUG, ..., [[Control protocol debugging]]) CF_CLI(DEBUG, proto_patt debug_mask, ( | | all) (all | off | { states | routes | filters | events | packets }), [[Control protocol debugging]]) diff --git a/nest/proto.c b/nest/proto.c index b23011d7..4f352a6f 100644 --- a/nest/proto.c +++ b/nest/proto.c @@ -586,6 +586,11 @@ proto_schedule_feed(struct proto *p, int initial) DBG("%s: Scheduling meal\n", p->name); p->core_state = FS_FEEDING; p->refeeding = !initial; + + /* Hack: reset exp_routes during refeed, and do not decrease it later */ + if (!initial) + p->stats.exp_routes = 0; + proto_relink(p); p->attn->hook = initial ? proto_feed_initial : proto_feed_more; ev_schedule(p->attn); @@ -825,7 +830,7 @@ proto_xxable(char *pattern, int xx) cnt++; switch (xx) { - case 0: + case XX_DISABLE: if (p->disabled) cli_msg(-8, "%s: already disabled", p->name); else @@ -835,7 +840,8 @@ proto_xxable(char *pattern, int xx) proto_rethink_goal(p); } break; - case 1: + + case XX_ENABLE: if (!p->disabled) cli_msg(-10, "%s: already enabled", p->name); else @@ -845,7 +851,8 @@ proto_xxable(char *pattern, int xx) proto_rethink_goal(p); } break; - case 2: + + case XX_RESTART: if (p->disabled) cli_msg(-8, "%s: already disabled", p->name); else @@ -857,24 +864,29 @@ proto_xxable(char *pattern, int xx) cli_msg(-12, "%s: restarted", p->name); } break; - case 3: - // FIXME change msg number - if (p->disabled) - cli_msg(-8, "%s: already disabled", p->name); - else if (p->reload_routes && p->reload_routes(p)) - cli_msg(-12, "%s: reloading", p->name); - else - cli_msg(-12, "%s: reload failed", p->name); - break; - case 4: - // FIXME change msg number + + case XX_RELOAD: + case XX_RELOAD_IN: + case XX_RELOAD_OUT: if (p->disabled) - cli_msg(-8, "%s: already disabled", p->name); - else { - proto_request_feeding(p); - cli_msg(-12, "%s: reexport failed", p->name); + cli_msg(-8, "%s: already disabled", p->name); + break; } + + /* re-importing routes */ + if (xx != XX_RELOAD_OUT) + if (! (p->reload_routes && p->reload_routes(p))) + { + cli_msg(-8006, "%s: reload failed", p->name); + break; + } + + /* re-exporting routes */ + if (xx != XX_RELOAD_IN) + proto_request_feeding(p); + + cli_msg(-15, "%s: reloading", p->name); break; default: diff --git a/nest/protocol.h b/nest/protocol.h index e1adc525..21a1c1b4 100644 --- a/nest/protocol.h +++ b/nest/protocol.h @@ -201,6 +201,13 @@ struct proto *proto_get_named(struct symbol *, struct protocol *); void proto_xxable(char *, int); void proto_debug(char *, unsigned int); +#define XX_DISABLE 0 +#define XX_ENABLE 1 +#define XX_RESTART 2 +#define XX_RELOAD 3 +#define XX_RELOAD_IN 4 +#define XX_RELOAD_OUT 5 + static inline u32 proto_get_router_id(struct proto_config *pc) { diff --git a/nest/rt-table.c b/nest/rt-table.c index 8efc0a61..df2834a6 100644 --- a/nest/rt-table.c +++ b/nest/rt-table.c @@ -165,6 +165,8 @@ do_rte_announce(struct announce_hook *a, int type, net *net, rte *new, rte *old, rte *old0 = old; int ok; + int fast_exit_hack = 0; + if (new) { p->stats.exp_updates_received++; @@ -174,6 +176,7 @@ do_rte_announce(struct announce_hook *a, int type, net *net, rte *new, rte *old, { p->stats.exp_updates_rejected++; drop_reason = "out of scope"; + fast_exit_hack = 1; } else if ((ok = p->import_control ? p->import_control(p, &new, &tmpa, rte_update_pool) : 0) < 0) { @@ -199,6 +202,11 @@ do_rte_announce(struct announce_hook *a, int type, net *net, rte *new, rte *old, else p->stats.exp_withdraws_received++; + /* Hack: This is here to prevent 'spurious withdraws' + for loopback addresses during reload. */ + if (fast_exit_hack) + return; + /* * This is a tricky part - we don't know whether route 'old' was * exported to protocol 'p' or was filtered by the export filter. @@ -245,9 +253,11 @@ do_rte_announce(struct announce_hook *a, int type, net *net, rte *new, rte *old, else p->stats.exp_withdraws_accepted++; + /* Hack: We do not decrease exp_routes during refeed, we instead + reset exp_routes at the start of refeed. */ if (new) p->stats.exp_routes++; - if (old) + if (old && !refeed) p->stats.exp_routes--; if (p->debug & D_ROUTES) -- cgit v1.2.3