From 387aa65a89434abe3128d36d1a6fc3842c94905d Mon Sep 17 00:00:00 2001 From: Timo Teräs Date: Mon, 27 May 2013 20:46:31 +0000 Subject: 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 Signed-off-by: Timo Teräs Signed-off-by: David S. Miller --- net/ipv4/esp4.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) (limited to 'net/ipv4/esp4.c') 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) 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_ESP, 0); - } else + else ipv4_redirect(skb, net, 0, 0, IPPROTO_ESP, 0); xfrm_state_put(x); } -- cgit v1.2.3-55-g7522