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Asynchronous neighbor notifications fixes

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This commit is contained in:
Maria Matejka 2022-01-26 21:16:19 +01:00
parent 0f6ea95754
commit 127862f626
4 changed files with 42 additions and 8 deletions
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1
nest/iface.h
View File

@ -153,6 +153,7 @@ typedef struct neighbor {
#define NEF_STICKY 1
#define NEF_ONLINK 2
#define NEF_IFACE 4 /* Entry for whole iface */
#define NEF_NOTIFY_MAIN 0x100 /* Notify from main_birdloop context */
neighbor *neigh_find(struct proto *p, ip_addr a, struct iface *ifa, uint flags);

41
nest/neighbor.c
View File

@ -60,6 +60,7 @@
static slab *neigh_slab;
static list neigh_hash_table[NEIGH_HASH_SIZE], sticky_neigh_list;
static void neigh_do_notify(void *);
static void neigh_do_notify_main(void *);
static inline uint
neigh_hash(struct proto *p, ip_addr a, struct iface *i)
@ -270,15 +271,29 @@ neigh_find(struct proto *p, ip_addr a, struct iface *iface, uint flags)
n->proto = p;
n->flags = flags;
n->scope = scope;
n->event = (event) { .hook = neigh_do_notify, .data = n };
ASSERT_DIE(birdloop_inside(p->loop));
if (p->loop == &main_birdloop)
n->event.list = &global_event_list;
if (flags & NEF_NOTIFY_MAIN)
n->event = (event) {
.hook = neigh_do_notify_main,
.data = n,
.list = &global_event_list,
};
else if (p->loop == &main_birdloop)
n->event = (event) {
.hook = neigh_do_notify,
.data = n,
.list = &global_event_list,
};
else
{
birdloop_link(p->loop);
n->event.list = birdloop_event_list(p->loop);
n->event = (event) {
.hook = neigh_do_notify,
.data = n,
.list = birdloop_event_list(p->loop),
};
}
IFACE_UNLOCK;
@ -340,6 +355,14 @@ neigh_notify(neighbor *n)
ev_send(n->event.list, &n->event);
}
static void
neigh_do_notify_main(void *data)
{
neighbor *n = data;
PROTO_LOCKED_FROM_MAIN(n->proto)
neigh_do_notify(data);
}
static void
neigh_do_notify(void *data)
{
@ -382,10 +405,18 @@ neigh_down(neighbor *n)
static inline void
neigh_free(neighbor *n)
{
ASSERT_DIE(birdloop_inside(n->proto->loop));
if (n->flags & NEF_NOTIFY_MAIN)
ASSERT_DIE(birdloop_inside(&main_birdloop));
rem_node(&n->n);
rem_node(&n->if_n);
ev_postpone(&n->event);
if (n->event.list != &global_event_list)
birdloop_unlink(n->proto->loop);
ev_postpone(&n->event);
sl_free(neigh_slab, n);
}

2
proto/bgp/bgp.c
View File

@ -1541,7 +1541,7 @@ bgp_start_locked(struct object_lock *lock)
return;
}
neighbor *n = neigh_find(&p->p, p->remote_ip, cf->iface, NEF_STICKY);
neighbor *n = neigh_find(&p->p, p->remote_ip, cf->iface, NEF_STICKY | NEF_NOTIFY_MAIN);
if (!n)
{
log(L_ERR "%s: Invalid remote address %I%J", p->p.name, p->remote_ip, cf->iface);

6
sysdep/unix/io-loop.c
View File

@ -498,7 +498,9 @@ void
birdloop_unlink(struct birdloop *loop)
{
ASSERT_DIE(birdloop_inside(loop));
loop->links--;
ASSERT_DIE(loop->links);
if (!--loop->links)
birdloop_ping(loop);
}
static void
@ -541,7 +543,7 @@ birdloop_main(void *arg)
birdloop_enter(loop);
if (loop->stopped)
if (loop->stopped && !loop->links)
break;
loop_begin = current_time();