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authorChangli Gao <xiaosuo@gmail.com>2010-07-31 13:25:08 +0000
committerDavid S. Miller <davem@davemloft.net>2010-08-02 17:25:07 -0700
commitc893b8066c7bf6156e4d760e5acaf4c148e37190 (patch)
tree8487417a6e938a1204a7e30cbc53fa2d274e6621 /net
parent3c0fef0b7d36e5f8d3ea3731a8228102274e3c23 (diff)
downloadlinux-c893b8066c7bf6156e4d760e5acaf4c148e37190.tar.bz2
ip_fragment: fix subtracting PPPOE_SES_HLEN from mtu twice
6c79bf0f2440fd250c8fce8d9b82fcf03d4e8350 subtracts PPPOE_SES_HLEN from mtu at the front of ip_fragment(). So the later subtraction should be removed. The MTU of 802.1q is also 1500, so MTU should not be changed. Signed-off-by: Changli Gao <xiaosuo@gmail.com> Signed-off-by: Bart De Schuymer <bdschuym@pandora.bo> ---- net/ipv4/ip_output.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) Signed-off-by: Bart De Schuymer <bdschuym@pandora.bo> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/ipv4/ip_output.c6
1 files changed, 2 insertions, 4 deletions
diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c
index 6652bd9da676..04b69896df5f 100644
--- a/net/ipv4/ip_output.c
+++ b/net/ipv4/ip_output.c
@@ -446,7 +446,7 @@ int ip_fragment(struct sk_buff *skb, int (*output)(struct sk_buff *))
int ptr;
struct net_device *dev;
struct sk_buff *skb2;
- unsigned int mtu, hlen, left, len, ll_rs, pad;
+ unsigned int mtu, hlen, left, len, ll_rs;
int offset;
__be16 not_last_frag;
struct rtable *rt = skb_rtable(skb);
@@ -585,9 +585,7 @@ slow_path:
/* for bridged IP traffic encapsulated inside f.e. a vlan header,
* we need to make room for the encapsulating header
*/
- pad = nf_bridge_pad(skb);
- ll_rs = LL_RESERVED_SPACE_EXTRA(rt->dst.dev, pad);
- mtu -= pad;
+ ll_rs = LL_RESERVED_SPACE_EXTRA(rt->dst.dev, nf_bridge_pad(skb));
/*
* Fragment the datagram.