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Diffstat (limited to 'proto/bgp/attrs.c')
-rw-r--r--proto/bgp/attrs.c109
1 files changed, 57 insertions, 52 deletions
diff --git a/proto/bgp/attrs.c b/proto/bgp/attrs.c
index 4c67b161..e6f11a88 100644
--- a/proto/bgp/attrs.c
+++ b/proto/bgp/attrs.c
@@ -357,26 +357,26 @@ bgp_aigp_set_metric(struct linpool *pool, const struct adata *ad, u64 metric)
}
int
-bgp_total_aigp_metric_(rte *e, u64 *metric, const struct adata **ad)
+bgp_total_aigp_metric_(struct rta *a, u64 *metric, const struct adata **ad)
{
- eattr *a = ea_find(e->attrs->eattrs, EA_CODE(PROTOCOL_BGP, BA_AIGP));
- if (!a)
+ eattr *ea = ea_find(a->eattrs, EA_CODE(PROTOCOL_BGP, BA_AIGP));
+ if (!ea)
return 0;
- const byte *b = bgp_aigp_get_tlv(a->u.ptr, BGP_AIGP_METRIC);
+ const byte *b = bgp_aigp_get_tlv(ea->u.ptr, BGP_AIGP_METRIC);
if (!b)
return 0;
u64 aigp = get_u64(b + 3);
- u64 step = e->attrs->igp_metric;
+ u64 step = a->igp_metric;
- if (!rte_resolvable(e) || (step >= IGP_METRIC_UNKNOWN))
+ if (!rta_resolvable(a) || (step >= IGP_METRIC_UNKNOWN))
step = BGP_AIGP_MAX;
if (!step)
step = 1;
- *ad = a->u.ptr;
+ *ad = ea->u.ptr;
*metric = aigp + step;
if (*metric < aigp)
*metric = BGP_AIGP_MAX;
@@ -398,7 +398,7 @@ bgp_init_aigp_metric(rte *e, u64 *metric, const struct adata **ad)
u32
bgp_rte_igp_metric(struct rte *rt)
{
- u64 metric = bgp_total_aigp_metric(rt);
+ u64 metric = bgp_total_aigp_metric(rt->attrs);
return (u32) MIN(metric, (u64) IGP_METRIC_UNKNOWN);
}
@@ -927,7 +927,7 @@ bgp_decode_large_community(struct bgp_parse_state *s, uint code UNUSED, uint fla
static void
bgp_export_mpls_label_stack(struct bgp_export_state *s, eattr *a)
{
- net_addr *n = s->route->net->n.addr;
+ const net_addr *n = s->route->net;
u32 *labels = (u32 *) a->u.ptr->data;
uint lnum = a->u.ptr->length / 4;
@@ -1485,7 +1485,7 @@ bgp_finish_attrs(struct bgp_parse_state *s, rta *a)
#define RBH_FN(a,h) h
#define RBH_REHASH bgp_rbh_rehash
-#define RBH_PARAMS /8, *2, 2, 2, 8, 20
+#define RBH_PARAMS /8, *2, 2, 2, 12, 20
HASH_DEFINE_REHASH_FN(RBH, struct bgp_bucket)
@@ -1601,7 +1601,7 @@ bgp_withdraw_bucket(struct bgp_channel *c, struct bgp_bucket *b)
#define PXH_FN(n,i,h) h
#define PXH_REHASH bgp_pxh_rehash
-#define PXH_PARAMS /8, *2, 2, 2, 8, 24
+#define PXH_PARAMS /8, *2, 2, 2, 12, 24
HASH_DEFINE_REHASH_FN(PXH, struct bgp_prefix)
@@ -1625,9 +1625,10 @@ bgp_free_prefix_table(struct bgp_channel *c)
}
static struct bgp_prefix *
-bgp_get_prefix(struct bgp_channel *c, net_addr *net, u32 path_id)
+bgp_get_prefix(struct bgp_channel *c, const net_addr *net, u32 path_id)
{
- u32 hash = net_hash(net) ^ u32_hash(path_id);
+ /* We must use a different hash function than the rtable */
+ u32 hash = u32_hash(net_hash(net) ^ u32_hash(path_id));
struct bgp_prefix *px = HASH_FIND(c->prefix_hash, PXH, net, path_id, hash);
if (px)
@@ -1669,10 +1670,10 @@ bgp_free_prefix(struct bgp_channel *c, struct bgp_prefix *px)
*/
int
-bgp_preexport(struct proto *P, rte *e)
+bgp_preexport(struct channel *c, rte *e)
{
struct proto *SRC = e->src->proto;
- struct bgp_proto *p = (struct bgp_proto *) P;
+ struct bgp_proto *p = (struct bgp_proto *) (c->proto);
struct bgp_proto *src = (SRC->proto == &proto_bgp) ? (struct bgp_proto *) SRC : NULL;
/* Reject our routes */
@@ -1684,8 +1685,8 @@ bgp_preexport(struct proto *P, rte *e)
return 0;
/* Reject flowspec that failed validation */
- if ((e->attrs->dest == RTD_UNREACHABLE) && net_is_flow(e->net->n.addr))
- return -1;
+ if ((e->attrs->dest == RTD_UNREACHABLE) && net_is_flow(e->net))
+ return -1;
/* IBGP route reflection, RFC 4456 */
if (p->is_internal && src->is_internal && (p->local_as == src->local_as))
@@ -1701,11 +1702,11 @@ bgp_preexport(struct proto *P, rte *e)
}
/* Handle well-known communities, RFC 1997 */
- struct eattr *c;
+ struct eattr *com;
if (p->cf->interpret_communities &&
- (c = ea_find(e->attrs->eattrs, EA_CODE(PROTOCOL_BGP, BA_COMMUNITY))))
+ (com = ea_find(e->attrs->eattrs, EA_CODE(PROTOCOL_BGP, BA_COMMUNITY))))
{
- const struct adata *d = c->u.ptr;
+ const struct adata *d = com->u.ptr;
/* Do not export anywhere */
if (int_set_contains(d, BGP_COMM_NO_ADVERTISE))
@@ -1785,7 +1786,7 @@ bgp_update_attrs(struct bgp_proto *p, struct bgp_channel *c, rte *e, ea_list *at
/* AIGP attribute - accumulate local metric or originate new one */
u64 metric;
if (s.local_next_hop &&
- (bgp_total_aigp_metric_(e, &metric, &ad) ||
+ (bgp_total_aigp_metric_(e->attrs, &metric, &ad) ||
(c->cf->aigp_originate && bgp_init_aigp_metric(e, &metric, &ad))))
{
ad = bgp_aigp_set_metric(pool, ad, metric);
@@ -1844,7 +1845,7 @@ bgp_update_attrs(struct bgp_proto *p, struct bgp_channel *c, rte *e, ea_list *at
}
void
-bgp_rt_notify(struct proto *P, struct channel *C, net *n, rte *new, rte *old)
+bgp_rt_notify(struct proto *P, struct channel *C, const net_addr *n, rte *new, const rte *old)
{
struct bgp_proto *p = (void *) P;
struct bgp_channel *c = (void *) C;
@@ -1858,7 +1859,7 @@ bgp_rt_notify(struct proto *P, struct channel *C, net *n, rte *new, rte *old)
/* Error during attribute processing */
if (!attrs)
- log(L_ERR "%s: Invalid route %N withdrawn", p->p.name, n->n.addr);
+ log(L_ERR "%s: Invalid route %N withdrawn", p->p.name, n);
/* If attributes are invalid, we fail back to withdraw */
buck = attrs ? bgp_get_bucket(c, attrs) : bgp_get_withdraw_bucket(c);
@@ -1870,7 +1871,7 @@ bgp_rt_notify(struct proto *P, struct channel *C, net *n, rte *new, rte *old)
path = old->src->global_id;
}
- px = bgp_get_prefix(c, n->n.addr, c->add_path_tx ? path : 0);
+ px = bgp_get_prefix(c, n, c->add_path_tx ? path : 0);
add_tail(&buck->prefixes, &px->buck_node);
bgp_schedule_packet(p->conn, c, PKT_UPDATE);
@@ -1931,8 +1932,8 @@ bgp_rte_better(rte *new, rte *old)
return 1;
/* RFC 4271 9.1.2.1. Route resolvability test */
- n = rte_resolvable(new);
- o = rte_resolvable(old);
+ n = rta_resolvable(new->attrs);
+ o = rta_resolvable(old->attrs);
if (n > o)
return 1;
if (n < o)
@@ -1957,8 +1958,8 @@ bgp_rte_better(rte *new, rte *old)
return 0;
/* RFC 7311 4.1 - Apply AIGP metric */
- u64 n2 = bgp_total_aigp_metric(new);
- u64 o2 = bgp_total_aigp_metric(old);
+ u64 n2 = bgp_total_aigp_metric(new->attrs);
+ u64 o2 = bgp_total_aigp_metric(old->attrs);
if (n2 < o2)
return 1;
if (n2 > o2)
@@ -2072,7 +2073,7 @@ bgp_rte_mergable(rte *pri, rte *sec)
return 0;
/* RFC 4271 9.1.2.1. Route resolvability test */
- if (rte_resolvable(pri) != rte_resolvable(sec))
+ if (rta_resolvable(pri->attrs) != rta_resolvable(sec->attrs))
return 0;
/* LLGR draft - depreference stale routes */
@@ -2145,16 +2146,15 @@ same_group(rte *r, u32 lpref, u32 lasn)
}
static inline int
-use_deterministic_med(rte *r)
+use_deterministic_med(struct rte_storage *r)
{
- struct proto *P = r->src->proto;
+ struct proto *P = r->rte.src->proto;
return (P->proto == &proto_bgp) && ((struct bgp_proto *) P)->cf->deterministic_med;
}
int
bgp_rte_recalculate(rtable *table, net *net, rte *new, rte *old, rte *old_best)
{
- rte *r, *s;
rte *key = new ? new : old;
u32 lpref = key->attrs->pref;
u32 lasn = bgp_get_neighbor(key);
@@ -2222,13 +2222,13 @@ bgp_rte_recalculate(rtable *table, net *net, rte *new, rte *old, rte *old_best)
}
/* The default case - find a new best-in-group route */
- r = new; /* new may not be in the list */
- for (s=net->routes; rte_is_valid(s); s=s->next)
- if (use_deterministic_med(s) && same_group(s, lpref, lasn))
+ rte *r = new; /* new may not be in the list */
+ for (struct rte_storage *s = net->routes; rte_is_valid(RTE_OR_NULL(s)); s = s->next)
+ if (use_deterministic_med(s) && same_group(&s->rte, lpref, lasn))
{
- s->pflags |= BGP_REF_SUPPRESSED;
- if (!r || bgp_rte_better(s, r))
- r = s;
+ s->rte.pflags |= BGP_REF_SUPPRESSED;
+ if (!r || bgp_rte_better(&s->rte, r))
+ r = &s->rte;
}
/* Simple case - the last route in group disappears */
@@ -2240,10 +2240,10 @@ bgp_rte_recalculate(rtable *table, net *net, rte *new, rte *old, rte *old_best)
new->pflags &= ~BGP_REF_SUPPRESSED;
/* Found all existing routes mergable with best-in-group */
- for (s=net->routes; rte_is_valid(s); s=s->next)
- if (use_deterministic_med(s) && same_group(s, lpref, lasn))
- if ((s != r) && bgp_rte_mergable(r, s))
- s->pflags &= ~BGP_REF_SUPPRESSED;
+ for (struct rte_storage *s = net->routes; rte_is_valid(RTE_OR_NULL(s)); s = s->next)
+ if (use_deterministic_med(s) && same_group(&s->rte, lpref, lasn))
+ if ((&s->rte != r) && bgp_rte_mergable(r, &s->rte))
+ s->rte.pflags &= ~BGP_REF_SUPPRESSED;
/* Found best-in-group */
r->pflags &= ~BGP_REF_SUPPRESSED;
@@ -2278,12 +2278,12 @@ bgp_rte_recalculate(rtable *table, net *net, rte *new, rte *old, rte *old_best)
return !old_suppressed;
}
-struct rte *
+rte *
bgp_rte_modify_stale(struct rte *r, struct linpool *pool)
{
- eattr *a = ea_find(r->attrs->eattrs, EA_CODE(PROTOCOL_BGP, BA_COMMUNITY));
- const struct adata *ad = a ? a->u.ptr : NULL;
- uint flags = a ? a->flags : BAF_PARTIAL;
+ eattr *ea = ea_find(r->attrs->eattrs, EA_CODE(PROTOCOL_BGP, BA_COMMUNITY));
+ const struct adata *ad = ea ? ea->u.ptr : NULL;
+ uint flags = ea ? ea->flags : BAF_PARTIAL;
if (ad && int_set_contains(ad, BGP_COMM_NO_LLGR))
return NULL;
@@ -2291,12 +2291,17 @@ bgp_rte_modify_stale(struct rte *r, struct linpool *pool)
if (ad && int_set_contains(ad, BGP_COMM_LLGR_STALE))
return r;
- r = rte_cow_rta(r, pool);
- bgp_set_attr_ptr(&(r->attrs->eattrs), BA_COMMUNITY, flags,
+ rta *a = rta_do_cow(r->attrs, pool);
+
+ _Thread_local static rte e0;
+ e0 = *r;
+ e0.attrs = a;
+
+ bgp_set_attr_ptr(&(a->eattrs), BA_COMMUNITY, flags,
int_set_add(pool, ad, BGP_COMM_LLGR_STALE));
- r->pflags |= BGP_REF_STALE;
+ e0.pflags |= BGP_REF_STALE;
- return r;
+ return &e0;
}
@@ -2387,14 +2392,14 @@ bgp_get_route_info(rte *e, byte *buf)
if (rte_stale(e))
buf += bsprintf(buf, "s");
- u64 metric = bgp_total_aigp_metric(e);
+ u64 metric = bgp_total_aigp_metric(e->attrs);
if (metric < BGP_AIGP_MAX)
{
buf += bsprintf(buf, "/%lu", metric);
}
else if (e->attrs->igp_metric)
{
- if (!rte_resolvable(e))
+ if (!rta_resolvable(e->attrs))
buf += bsprintf(buf, "/-");
else if (e->attrs->igp_metric >= IGP_METRIC_UNKNOWN)
buf += bsprintf(buf, "/?");
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-02 22:28:57 +0000