From b1b9aa2787e3f40f38fbf6a258fcbd2b0a19478a Mon Sep 17 00:00:00 2001 From: Natanael Copa Date: Wed, 14 Apr 2010 08:44:44 +0000 Subject: main/linux-grsec: ipsec improvement patches backport of net-next to improve ipsec send performance --- ...ude-route-header_len-in-max_headroom-calc.patch | 39 ++++++++++++++++++++++ 1 file changed, 39 insertions(+) create mode 100644 main/linux-grsec/0003-ip_gre-include-route-header_len-in-max_headroom-calc.patch (limited to 'main/linux-grsec/0003-ip_gre-include-route-header_len-in-max_headroom-calc.patch') diff --git a/main/linux-grsec/0003-ip_gre-include-route-header_len-in-max_headroom-calc.patch b/main/linux-grsec/0003-ip_gre-include-route-header_len-in-max_headroom-calc.patch new file mode 100644 index 00000000..61d7c9a6 --- /dev/null +++ b/main/linux-grsec/0003-ip_gre-include-route-header_len-in-max_headroom-calc.patch @@ -0,0 +1,39 @@ +From cd0e9d08480e1e0648e17d099ecf50f6fd8714e5 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Timo=20Ter=C3=A4s?= +Date: Sat, 20 Mar 2010 02:27:58 +0000 +Subject: [PATCH 03/18] ip_gre: include route header_len in max_headroom calculation + +Taking route's header_len into account, and updating gre device +needed_headroom will give better hints on upper bound of required +headroom. This is useful if the gre traffic is xfrm'ed. + +Signed-off-by: Timo Teras +Acked-by: Herbert Xu +Signed-off-by: David S. Miller +(cherry picked from commit 243aad830e8a4cdda261626fbaeddde16b08d04a) +--- + net/ipv4/ip_gre.c | 4 +++- + 1 files changed, 3 insertions(+), 1 deletions(-) + +diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c +index ac88ce5..7f1ff73 100644 +--- a/net/ipv4/ip_gre.c ++++ b/net/ipv4/ip_gre.c +@@ -803,11 +803,13 @@ static netdev_tx_t ipgre_tunnel_xmit(struct sk_buff *skb, struct net_device *dev + tunnel->err_count = 0; + } + +- max_headroom = LL_RESERVED_SPACE(tdev) + gre_hlen; ++ max_headroom = LL_RESERVED_SPACE(tdev) + gre_hlen + rt->u.dst.header_len; + + if (skb_headroom(skb) < max_headroom || skb_shared(skb)|| + (skb_cloned(skb) && !skb_clone_writable(skb, 0))) { + struct sk_buff *new_skb = skb_realloc_headroom(skb, max_headroom); ++ if (max_headroom > dev->needed_headroom) ++ dev->needed_headroom = max_headroom; + if (!new_skb) { + ip_rt_put(rt); + stats->tx_dropped++; +-- +1.7.0.2 + -- cgit v1.2.3