I goofed with that patch. This is the correct one. Sorry about that.
--- linux/net/ipv4/ipmr.c~ Thu Oct 31 01:54:40 2002
+++ linux/net/ipv4/ipmr.c Thu Oct 31 01:55:31 2002
@@ -1111,7 +1111,7 @@
{
struct dst_entry *dst = skb->dst;
- if (skb->len <= dst->pmtu)
+ if (skb->len <= dst_pmtu(dst))
return dst->output(skb);
else
return ip_fragment(skb, dst->output);
@@ -1167,7 +1167,7 @@
dev = rt->u.dst.dev;
- if (skb->len+encap > rt->u.dst.pmtu && (ntohs(iph->frag_off) & IP_DF)) {
+ if (skb->len+encap > dst_pmtu(&rt->u.dst) && (ntohs(iph->frag_off) & IP_DF)) {
/* Do not fragment multicasts. Alas, IPv4 does not
allow to send ICMP, so that packets will disappear
to blackhole.
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