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authorTimo Teräs <timo.teras@iki.fi>2013-05-28 00:46:31 +0400
committerDavid S. Miller <davem@davemloft.net>2013-06-03 11:07:42 +0400
commit387aa65a89434abe3128d36d1a6fc3842c94905d (patch)
tree65ca8ab0c6224eb39941455b1eb0abd2fa410035 /net/ipv4/ipcomp.c
parent829a5071ccf040b78bd93286a218580c66833b00 (diff)
downloadlinux-387aa65a89434abe3128d36d1a6fc3842c94905d.tar.xz
ipv4: properly refresh rtable entries on pmtu/redirect events
This reverts commit 05ab86c5 (xfrm4: Invalidate all ipv4 routes on IPsec pmtu events). Flushing all cached entries is not needed. Instead, invalidate only the related next hop dsts to recheck for the added next hop exception where needed. This also fixes a subtle race due to bumping generation id's before updating the pmtu. Cc: Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by: Timo Teräs <timo.teras@iki.fi> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/ipcomp.c')
-rw-r--r--net/ipv4/ipcomp.c7
1 files changed, 2 insertions, 5 deletions
diff --git a/net/ipv4/ipcomp.c b/net/ipv4/ipcomp.c
index 59cb8c769056..826be4cb482a 100644
--- a/net/ipv4/ipcomp.c
+++ b/net/ipv4/ipcomp.c
@@ -47,12 +47,9 @@ static void ipcomp4_err(struct sk_buff *skb, u32 info)
if (!x)
return;
- if (icmp_hdr(skb)->type == ICMP_DEST_UNREACH) {
- atomic_inc(&flow_cache_genid);
- rt_genid_bump(net);
-
+ if (icmp_hdr(skb)->type == ICMP_DEST_UNREACH)
ipv4_update_pmtu(skb, net, info, 0, 0, IPPROTO_COMP, 0);
- } else
+ else
ipv4_redirect(skb, net, 0, 0, IPPROTO_COMP, 0);
xfrm_state_put(x);
}