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BGP Flowspec validation: Removed in-route optimization for multithreading compatibility

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This commit is contained in:
Maria Matejka 2022-02-11 22:29:13 +01:00
parent 24773af9e0
commit 8a4bc4fdbf
5 changed files with 6 additions and 13 deletions
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1
nest/route.h
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@ -267,7 +267,6 @@ typedef struct rte {
struct { struct {
u8 suppressed; /* Used for deterministic MED comparison */ u8 suppressed; /* Used for deterministic MED comparison */
s8 stale; /* Route is LLGR_STALE, -1 if unknown */ s8 stale; /* Route is LLGR_STALE, -1 if unknown */
struct rtable *base_table; /* Base table for Flowspec validation */
} bgp; } bgp;
#endif #endif
} u; } u;

8
nest/rt-table.c
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@ -2831,12 +2831,16 @@ static rte *
rt_flowspec_update_rte(rtable *tab, rte *r) rt_flowspec_update_rte(rtable *tab, rte *r)
{ {
#ifdef CONFIG_BGP #ifdef CONFIG_BGP
if ((r->attrs->source != RTS_BGP) || !r->u.bgp.base_table) if (r->attrs->source != RTS_BGP)
return NULL;
struct bgp_channel *bc = (struct bgp_channel *) r->sender;
if (!bc->base_table)
return NULL; return NULL;
const net_addr *n = r->net->n.addr; const net_addr *n = r->net->n.addr;
struct bgp_proto *p = (void *) r->src->proto; struct bgp_proto *p = (void *) r->src->proto;
int valid = rt_flowspec_check(r->u.bgp.base_table, tab, n, r->attrs, p->is_interior); int valid = rt_flowspec_check(bc->base_table, tab, n, r->attrs, p->is_interior);
int dest = valid ? RTD_NONE : RTD_UNREACHABLE; int dest = valid ? RTD_NONE : RTD_UNREACHABLE;
if (dest == r->attrs->dest) if (dest == r->attrs->dest)

1
proto/bgp/bgp.h
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@ -453,7 +453,6 @@ struct bgp_parse_state {
jmp_buf err_jmpbuf; jmp_buf err_jmpbuf;
struct hostentry *hostentry; struct hostentry *hostentry;
struct rtable *base_table;
adata *mpls_labels; adata *mpls_labels;
/* Cached state for bgp_rte_update() */ /* Cached state for bgp_rte_update() */

6
proto/bgp/packets.c
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@ -1025,9 +1025,6 @@ bgp_apply_flow_validation(struct bgp_parse_state *s, const net_addr *n, rta *a)
int valid = rt_flowspec_check(c->base_table, c->c.table, n, a, s->proto->is_interior); int valid = rt_flowspec_check(c->base_table, c->c.table, n, a, s->proto->is_interior);
a->dest = valid ? RTD_NONE : RTD_UNREACHABLE; a->dest = valid ? RTD_NONE : RTD_UNREACHABLE;
/* Set rte.bgp.base_table later from this state variable */
s->base_table = c->base_table;
/* Invalidate cached rta if dest changes */ /* Invalidate cached rta if dest changes */
if (s->cached_rta && (s->cached_rta->dest != a->dest)) if (s->cached_rta && (s->cached_rta->dest != a->dest))
{ {
@ -1398,7 +1395,6 @@ bgp_rte_update(struct bgp_parse_state *s, const net_addr *n, u32 path_id, rta *a
e->pflags = 0; e->pflags = 0;
e->u.bgp.suppressed = 0; e->u.bgp.suppressed = 0;
e->u.bgp.stale = -1; e->u.bgp.stale = -1;
e->u.bgp.base_table = s->base_table;
rte_update3(&s->channel->c, n, e, s->last_src); rte_update3(&s->channel->c, n, e, s->last_src);
} }
@ -2462,8 +2458,6 @@ bgp_decode_nlri(struct bgp_parse_state *s, u32 afi, byte *nlri, uint len, ea_lis
s->last_id = 0; s->last_id = 0;
s->last_src = s->proto->p.main_source; s->last_src = s->proto->p.main_source;
s->base_table = NULL;
/* /*
* IPv4 BGP and MP-BGP may be used together in one update, therefore we do not * IPv4 BGP and MP-BGP may be used together in one update, therefore we do not
* add BA_NEXT_HOP in bgp_decode_attrs(), but we add it here independently for * add BA_NEXT_HOP in bgp_decode_attrs(), but we add it here independently for

3
proto/pipe/pipe.c
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@ -82,10 +82,7 @@ pipe_rt_notify(struct proto *P, struct channel *src_ch, net *n, rte *new, rte *o
#ifdef CONFIG_BGP #ifdef CONFIG_BGP
/* Hack to cleanup cached value */ /* Hack to cleanup cached value */
if (e->src->proto->proto == &proto_bgp) if (e->src->proto->proto == &proto_bgp)
{
e->u.bgp.stale = -1; e->u.bgp.stale = -1;
e->u.bgp.base_table = NULL;
}
#endif #endif
} }
else else