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authorTimo Teräs <timo.teras@iki.fi>2013-05-27 16:46:31 -0400
committerDavid S. Miller <davem@davemloft.net>2013-06-03 03:07:42 -0400
commit387aa65a89434abe3128d36d1a6fc3842c94905d (patch)
tree65ca8ab0c6224eb39941455b1eb0abd2fa410035 /net/ipv4/esp4.c
parent829a5071ccf040b78bd93286a218580c66833b00 (diff)
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/esp4.c')
-rw-r--r--net/ipv4/esp4.c7
1 files changed, 2 insertions, 5 deletions
diff --git a/net/ipv4/esp4.c b/net/ipv4/esp4.c
index 4cfe34d4cc96..ab3d814bc80a 100644
--- a/net/ipv4/esp4.c
+++ b/net/ipv4/esp4.c
@@ -502,12 +502,9 @@ static void esp4_err(struct sk_buff *skb, u32 info)
502 if (!x) 502 if (!x)
503 return; 503 return;
504 504
505 if (icmp_hdr(skb)->type == ICMP_DEST_UNREACH) { 505 if (icmp_hdr(skb)->type == ICMP_DEST_UNREACH)
506 atomic_inc(&flow_cache_genid);
507 rt_genid_bump(net);
508
509 ipv4_update_pmtu(skb, net, info, 0, 0, IPPROTO_ESP, 0); 506 ipv4_update_pmtu(skb, net, info, 0, 0, IPPROTO_ESP, 0);
510 } else 507 else
511 ipv4_redirect(skb, net, 0, 0, IPPROTO_ESP, 0); 508 ipv4_redirect(skb, net, 0, 0, IPPROTO_ESP, 0);
512 xfrm_state_put(x); 509 xfrm_state_put(x);
513} 510}