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BGP: implement Adj-RIB-In

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The patch implements optional internal import table to a channel and
hooks it to BGP so it can be used as Adj-RIB-In. When enabled, all
received (pre-filtered) routes are stored there and import filters can
be re-evaluated without explicit route refresh. An import table can be
examined using e.g. 'show route import table bgp1.ipv4'.
This commit is contained in:
Ondrej Zajicek (work)
2018-09-27 22:57:55 +02:00
parent 01fd00f5ed
commit 682d3f7de0
9 changed files with 235 additions and 8 deletions
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22
nest/protocol.h
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@@ -306,8 +306,6 @@ rte_make_tmp_attrs(struct rte **rt, struct linpool *pool)
(*rt)->attrs->eattrs = ea;
}
/* Moved from route.h to avoid dependency conflicts */
static inline void rte_update(struct proto *p, const net_addr *n, rte *new) { rte_update2(p->main_channel, n, new, p->main_source); }
extern pool *proto_pool;
extern list proto_list;
@@ -539,6 +537,11 @@ struct channel {
btime last_state_change; /* Time of last state transition */
btime last_tx_filter_change;
struct rtable *in_table; /* Internal table for received routes */
struct event *reload_event; /* Event responsible for reloading from in_table */
struct fib_iterator reload_fit; /* Iterator in in_table used during reloading */
u8 reload_active; /* Iterator reload_fit is linked */
};
@@ -606,6 +609,8 @@ struct channel *proto_add_channel(struct proto *p, struct channel_config *cf);
int proto_configure_channel(struct proto *p, struct channel **c, struct channel_config *cf);
void channel_set_state(struct channel *c, uint state);
void channel_setup_in_table(struct channel *c);
void channel_schedule_reload(struct channel *c);
static inline void channel_init(struct channel *c) { channel_set_state(c, CS_START); }
static inline void channel_open(struct channel *c) { channel_set_state(c, CS_UP); }
@@ -617,4 +622,17 @@ void *channel_config_get(const struct channel_class *cc, const char *name, uint
int channel_reconfigure(struct channel *c, struct channel_config *cf);
/* Moved from route.h to avoid dependency conflicts */
static inline void rte_update(struct proto *p, const net_addr *n, rte *new) { rte_update2(p->main_channel, n, new, p->main_source); }
static inline void
rte_update3(struct channel *c, const net_addr *n, rte *new, struct rte_src *src)
{
if (c->in_table && !rte_update_in(c, n, new, src))
return;
rte_update2(c, n, new, src);
}
#endif