static void
ip6ip6_tnl_link(struct ip6_tnl *t)
{
struct ip6_tnl **tp = ip6ip6_bucket(&t->parms);
t->next = *tp;
write_lock_bh(&ip6ip6_lock);
*tp = t;
write_unlock_bh(&ip6ip6_lock);
}
static void
ip6ip6_tnl_unlink(struct ip6_tnl *t)
{
struct ip6_tnl **tp;
for (tp = ip6ip6_bucket(&t->parms); *tp; tp = &(*tp)->next) {
if (t == *tp) {
write_lock_bh(&ip6ip6_lock);
*tp = t->next;
write_unlock_bh(&ip6ip6_lock);
break;
}
}
}
static struct ip6_tnl *ip6ip6_tnl_locate(struct ip6_tnl_parm *p, int create)
{
struct in6_addr *remote = &p->raddr;
struct in6_addr *local = &p->laddr;
struct ip6_tnl *t;
for (t = *ip6ip6_bucket(p); t; t = t->next) {
if (ipv6_addr_equal(local, &t->parms.laddr) &&
ipv6_addr_equal(remote, &t->parms.raddr))
return t;
}
if (!create)
return NULL;
return ip6_tnl_create(p);
}
static int
ip6ip6_tnl_locate(struct ip6_tnl_parm *p, struct ip6_tnl **pt, int create)
{
struct in6_addr *remote = &p->raddr;
struct in6_addr *local = &p->laddr;
struct ip6_tnl *t;
if (p->proto != IPPROTO_IPV6)
return -EINVAL;
for (t = *ip6ip6_bucket(p); t; t = t->next) {
if (ipv6_addr_equal(local, &t->parms.laddr) &&
ipv6_addr_equal(remote, &t->parms.raddr)) {
*pt = t;
return (create ? -EEXIST : 0);
}
}
if (!create)
return -ENODEV;
return ip6_tnl_create(p, pt);
}
