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ipv6: ndisc: Convert to dst_neigh_lookup()

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Now all code paths grab a local reference to the neigh, so if neigh
is not NULL we unconditionally release it at the end.  The old logic
would only release if we didn't have a non-NULL 'rt'.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2012-01-27 15:07:56 -08:00
parent 0ec8866204
commit eb857186eb
1 changed files with 12 additions and 6 deletions
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18
net/ipv6/ndisc.c
View file

@ -1223,11 +1223,17 @@ static void ndisc_router_discovery(struct sk_buff *skb)
rt = rt6_get_dflt_router(&ipv6_hdr(skb)->saddr, skb->dev);
if (rt)
neigh = dst_get_neighbour_noref(&rt->dst);
if (rt) {
neigh = dst_neigh_lookup(&rt->dst, &ipv6_hdr(skb)->saddr);
if (!neigh) {
ND_PRINTK0(KERN_ERR
"ICMPv6 RA: %s() got default router without neighbour.\n",
__func__);
dst_release(&rt->dst);
return;
}
}
if (rt && lifetime == 0) {
neigh_clone(neigh);
ip6_del_rt(rt);
rt = NULL;
}
@ -1244,7 +1250,7 @@ static void ndisc_router_discovery(struct sk_buff *skb)
return;
}
neigh = dst_get_neighbour_noref(&rt->dst);
neigh = dst_neigh_lookup(&rt->dst, &ipv6_hdr(skb)->saddr);
if (neigh == NULL) {
ND_PRINTK0(KERN_ERR
"ICMPv6 RA: %s() got default router without neighbour.\n",
@ -1411,7 +1417,7 @@ skip_routeinfo:
out:
if (rt)
dst_release(&rt->dst);
else if (neigh)
if (neigh)
neigh_release(neigh);
}