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authorPravin B Shelar <pshelar@nicira.com>2013-02-22 07:30:30 +0000
committerDavid S. Miller <davem@davemloft.net>2013-02-25 15:47:41 -0500
commit490ab08127cebc25e3a260a74556b56ce5f47c0f (patch)
tree61a662927a56a72ae7d567728edae1ce2bc9c8c5 /net
parent2bedc2e65bf58676afc4b380617327e018a97270 (diff)
downloadlinaro-lsk-490ab08127cebc25e3a260a74556b56ce5f47c0f.tar.gz
IP_GRE: Fix IP-Identification.
GRE-GSO generates ip fragments with id 0,2,3,4... for every GSO packet, which is not correct. Following patch fixes it by setting ip-header id unique id of fragments are allowed. As Eric Dumazet suggested it is optimized by using inner ip-header whenever inner packet is ipv4. Signed-off-by: Pravin B Shelar <pshelar@nicira.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/ipv4/af_inet.c6
-rw-r--r--net/ipv4/ip_gre.c3
2 files changed, 6 insertions, 3 deletions
diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
index 15847e19b7d..68f6a94f766 100644
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c
@@ -1332,8 +1332,10 @@ static struct sk_buff *inet_gso_segment(struct sk_buff *skb,
if (skb->next != NULL)
iph->frag_off |= htons(IP_MF);
offset += (skb->len - skb->mac_len - iph->ihl * 4);
- } else
- iph->id = htons(id++);
+ } else {
+ if (!(iph->frag_off & htons(IP_DF)))
+ iph->id = htons(id++);
+ }
iph->tot_len = htons(skb->len - skb->mac_len);
iph->check = 0;
iph->check = ip_fast_csum(skb_network_header(skb), iph->ihl);
diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c
index 5ef4da780ac..b8bada00d51 100644
--- a/net/ipv4/ip_gre.c
+++ b/net/ipv4/ip_gre.c
@@ -970,7 +970,8 @@ static netdev_tx_t ipgre_tunnel_xmit(struct sk_buff *skb, struct net_device *dev
iph->daddr = fl4.daddr;
iph->saddr = fl4.saddr;
iph->ttl = ttl;
- iph->id = 0;
+
+ tunnel_ip_select_ident(skb, old_iph, &rt->dst);
if (ttl == 0) {
if (skb->protocol == htons(ETH_P_IP))