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BFD: Support for VRFs

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Allow multiple BFD instances in separate VRFs, dispatch BFD requests
according to VRFs.

Thanks to Alexander Zubkov for notice and patches.
This commit is contained in:
Ondrej Zajicek (work) 2019-07-17 16:20:35 +02:00
parent 2eaf65ec60
commit cf7ff99513
8 changed files with 22 additions and 23 deletions
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5
nest/bfd.h
View File

@ -19,6 +19,7 @@ struct bfd_request {
ip_addr addr;
ip_addr local;
struct iface *iface;
struct iface *vrf;
void (*hook)(struct bfd_request *);
void *data;
@ -40,13 +41,13 @@ struct bfd_request {
#ifdef CONFIG_BFD
struct bfd_request * bfd_request_session(pool *p, ip_addr addr, ip_addr local, struct iface *iface, void (*hook)(struct bfd_request *), void *data);
struct bfd_request * bfd_request_session(pool *p, ip_addr addr, ip_addr local, struct iface *iface, struct iface *vrf, void (*hook)(struct bfd_request *), void *data);
static inline void cf_check_bfd(int use UNUSED) { }
#else
static inline struct bfd_request * bfd_request_session(pool *p UNUSED, ip_addr addr UNUSED, ip_addr local UNUSED, struct iface *iface UNUSED, void (*hook)(struct bfd_request *) UNUSED, void *data UNUSED) { return NULL; }
static inline struct bfd_request * bfd_request_session(pool *p UNUSED, ip_addr addr UNUSED, ip_addr local UNUSED, struct iface *iface UNUSED, struct iface *vrf UNUSED, void (*hook)(struct bfd_request *) UNUSED, void *data UNUSED) { return NULL; }
static inline void cf_check_bfd(int use) { if (use) cf_error("BFD not available"); }

21
proto/bfd/bfd.c
View File

@ -624,6 +624,9 @@ bfd_request_notify(struct bfd_request *req, u8 state, u8 diag)
static int
bfd_add_request(struct bfd_proto *p, struct bfd_request *req)
{
if (p->p.vrf && (p->p.vrf != req->vrf))
return 0;
struct bfd_session *s = bfd_find_session_by_addr(p, req->addr);
u8 state, diag;
@ -685,7 +688,8 @@ bfd_drop_requests(struct bfd_proto *p)
static struct resclass bfd_request_class;
struct bfd_request *
bfd_request_session(pool *p, ip_addr addr, ip_addr local, struct iface *iface,
bfd_request_session(pool *p, ip_addr addr, ip_addr local,
struct iface *iface, struct iface *vrf,
void (*hook)(struct bfd_request *), void *data)
{
struct bfd_request *req = ralloc(p, &bfd_request_class);
@ -696,6 +700,7 @@ bfd_request_session(pool *p, ip_addr addr, ip_addr local, struct iface *iface,
req->addr = addr;
req->local = local;
req->iface = iface;
req->vrf = vrf;
bfd_submit_request(req);
@ -754,7 +759,7 @@ bfd_neigh_notify(struct neighbor *nb)
if ((nb->scope > 0) && !n->req)
{
ip_addr local = ipa_nonzero(n->local) ? n->local : nb->ifa->ip;
n->req = bfd_request_session(p->p.pool, n->addr, local, nb->iface, NULL, NULL);
n->req = bfd_request_session(p->p.pool, n->addr, local, nb->iface, p->p.vrf, NULL, NULL);
}
if ((nb->scope <= 0) && n->req)
@ -771,7 +776,7 @@ bfd_start_neighbor(struct bfd_proto *p, struct bfd_neighbor *n)
if (n->multihop)
{
n->req = bfd_request_session(p->p.pool, n->addr, n->local, NULL, NULL, NULL);
n->req = bfd_request_session(p->p.pool, n->addr, n->local, NULL, p->p.vrf, NULL, NULL);
return;
}
@ -1051,15 +1056,6 @@ bfd_reconfigure(struct proto *P, struct proto_config *c)
return 1;
}
/* Ensure one instance */
struct bfd_config *bfd_cf;
static void
bfd_preconfig(struct protocol *P UNUSED, struct config *c UNUSED)
{
bfd_cf = NULL;
}
static void
bfd_copy_config(struct proto_config *dest, struct proto_config *src UNUSED)
{
@ -1123,6 +1119,5 @@ struct protocol proto_bfd = {
.start = bfd_start,
.shutdown = bfd_shutdown,
.reconfigure = bfd_reconfigure,
.preconfig = bfd_preconfig,
.copy_config = bfd_copy_config,
};

4
proto/bfd/config.Y
View File

@ -38,10 +38,6 @@ bfd_proto_start: proto_start BFD
this_proto = proto_config_new(&proto_bfd, $1);
init_list(&BFD_CFG->patt_list);
init_list(&BFD_CFG->neigh_list);
if (bfd_cf)
cf_error("Only one BFD instance allowed");
bfd_cf = BFD_CFG;
};
bfd_proto_item:

2
proto/bfd/packets.c
View File

@ -413,6 +413,7 @@ bfd_open_rx_sk(struct bfd_proto *p, int multihop, int af)
sk->type = SK_UDP;
sk->subtype = af;
sk->sport = !multihop ? BFD_CONTROL_PORT : BFD_MULTI_CTL_PORT;
sk->vrf = p->p.vrf;
sk->data = p;
sk->rbsize = BFD_MAX_LEN;
@ -444,6 +445,7 @@ bfd_open_tx_sk(struct bfd_proto *p, ip_addr local, struct iface *ifa)
sk->saddr = local;
sk->dport = ifa ? BFD_CONTROL_PORT : BFD_MULTI_CTL_PORT;
sk->iface = ifa;
sk->vrf = p->p.vrf;
sk->data = p;
sk->tbsize = BFD_MAX_LEN;

2
proto/bgp/bgp.c
View File

@ -1371,7 +1371,7 @@ bgp_update_bfd(struct bgp_proto *p, int use_bfd)
if (use_bfd && !p->bfd_req && !bgp_is_dynamic(p))
p->bfd_req = bfd_request_session(p->p.pool, p->remote_ip, p->local_ip,
p->cf->multihop ? NULL : p->neigh->iface,
bgp_bfd_notify, p);
p->p.vrf, bgp_bfd_notify, p);
if (!use_bfd && p->bfd_req)
{

5
proto/ospf/neighbor.c
View File

@ -771,8 +771,11 @@ ospf_neigh_bfd_hook(struct bfd_request *req)
void
ospf_neigh_update_bfd(struct ospf_neighbor *n, int use_bfd)
{
struct ospf_proto *p = n->ifa->oa->po;
if (use_bfd && !n->bfd_req)
n->bfd_req = bfd_request_session(n->pool, n->ip, n->ifa->addr->ip, n->ifa->iface,
n->bfd_req = bfd_request_session(n->pool, n->ip, n->ifa->addr->ip,
n->ifa->iface, p->p.vrf,
ospf_neigh_bfd_hook, n);
if (!use_bfd && n->bfd_req)

3
proto/rip/rip.c
View File

@ -483,7 +483,8 @@ rip_update_bfd(struct rip_proto *p, struct rip_neighbor *n)
*/
ip_addr saddr = rip_is_v2(p) ? n->ifa->sk->saddr : n->nbr->ifa->ip;
n->bfd_req = bfd_request_session(p->p.pool, n->nbr->addr, saddr,
n->nbr->iface, rip_bfd_notify, n);
n->nbr->iface, p->p.vrf,
rip_bfd_notify, n);
}
if (!use_bfd && n->bfd_req)

3
proto/static/static.c
View File

@ -159,7 +159,8 @@ static_update_bfd(struct static_proto *p, struct static_route *r)
if (bfd_up && !r->bfd_req)
{
// ip_addr local = ipa_nonzero(r->local) ? r->local : nb->ifa->ip;
r->bfd_req = bfd_request_session(p->p.pool, r->via, nb->ifa->ip, nb->iface,
r->bfd_req = bfd_request_session(p->p.pool, r->via, nb->ifa->ip,
nb->iface, p->p.vrf,
static_bfd_notify, r);
}