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xfrm: Handle blackhole route creation via afinfo.

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That way we don't have to potentially do this in every xfrm_lookup()
caller.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller
2011-03-01 14:59:04 -08:00
parent 69ead7afdf
commit 2774c131b1
10 changed files with 50 additions and 67 deletions
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20
net/ipv4/route.c
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@@ -2675,12 +2675,10 @@ static struct dst_ops ipv4_dst_blackhole_ops = {
.update_pmtu = ipv4_rt_blackhole_update_pmtu,
};
static int ipv4_dst_blackhole(struct net *net, struct rtable **rp, struct flowi *flp)
struct dst_entry *ipv4_blackhole_route(struct net *net, struct dst_entry *dst_orig)
{
struct rtable *ort = *rp;
struct rtable *rt = (struct rtable *)
dst_alloc(&ipv4_dst_blackhole_ops, 1);
struct rtable *rt = dst_alloc(&ipv4_dst_blackhole_ops, 1);
struct rtable *ort = (struct rtable *) dst_orig;
if (rt) {
struct dst_entry *new = &rt->dst;
@@ -2714,9 +2712,9 @@ static int ipv4_dst_blackhole(struct net *net, struct rtable **rp, struct flowi
dst_free(new);
}
dst_release(&(*rp)->dst);
*rp = rt;
return rt ? 0 : -ENOMEM;
dst_release(dst_orig);
return rt ? &rt->dst : ERR_PTR(-ENOMEM);
}
int ip_route_output_flow(struct net *net, struct rtable **rp, struct flowi *flp,
@@ -2732,11 +2730,7 @@ int ip_route_output_flow(struct net *net, struct rtable **rp, struct flowi *flp,
flp->fl4_src = (*rp)->rt_src;
if (!flp->fl4_dst)
flp->fl4_dst = (*rp)->rt_dst;
err = __xfrm_lookup(net, (struct dst_entry **)rp, flp, sk, 0);
if (err == -EREMOTE)
err = ipv4_dst_blackhole(net, rp, flp);
return err;
return xfrm_lookup(net, (struct dst_entry **)rp, flp, sk, 0);
}
return 0;