offloading: Support multiple vlan tags in GSO.

[net-next-2.6.git] / net / core / dev.c

diff --git a/net/core/dev.c b/net/core/dev.c
index 0b403d5033111cf4a9de5e865f6949f84c4e2343..368930a988e3e1b33acd18a28bd11fbd8286a3f1 100644 (file)
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -1794,16 +1794,18 @@ struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features)
        struct sk_buff *segs = ERR_PTR(-EPROTONOSUPPORT);
        struct packet_type *ptype;
        __be16 type = skb->protocol;
+       int vlan_depth = ETH_HLEN;
        int err;
 
-       if (type == htons(ETH_P_8021Q)) {
-               struct vlan_ethhdr *veh;
+       while (type == htons(ETH_P_8021Q)) {
+               struct vlan_hdr *vh;
 
-               if (unlikely(!pskb_may_pull(skb, VLAN_ETH_HLEN)))
+               if (unlikely(!pskb_may_pull(skb, vlan_depth + VLAN_HLEN)))
                        return ERR_PTR(-EINVAL);
 
-               veh = (struct vlan_ethhdr *)skb->data;
-               type = veh->h_vlan_encapsulated_proto;
+               vh = (struct vlan_hdr *)(skb->data + vlan_depth);
+               type = vh->h_vlan_encapsulated_proto;
+               vlan_depth += VLAN_HLEN;
        }
 
        skb_reset_mac_header(skb);