[SK_BUFF]: Introduce skb_network_header()
For the places where we need a pointer to the network header, it is still legal
to touch skb->nh.raw directly if just adding to, subtracting from or setting it
to another layer header.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/loopback.c b/drivers/net/loopback.c
index af476d2..9265c27 100644
--- a/drivers/net/loopback.c
+++ b/drivers/net/loopback.c
@@ -76,7 +76,8 @@
static void emulate_large_send_offload(struct sk_buff *skb)
{
struct iphdr *iph = skb->nh.iph;
- struct tcphdr *th = (struct tcphdr*)(skb->nh.raw + (iph->ihl * 4));
+ struct tcphdr *th = (struct tcphdr *)(skb_network_header(skb) +
+ (iph->ihl * 4));
unsigned int doffset = (iph->ihl + th->doff) * 4;
unsigned int mtu = skb_shinfo(skb)->gso_size + doffset;
unsigned int offset = 0;
@@ -93,7 +94,7 @@
skb_set_mac_header(nskb, -ETH_HLEN);
skb_reset_network_header(nskb);
iph = nskb->nh.iph;
- memcpy(nskb->data, skb->nh.raw, doffset);
+ memcpy(nskb->data, skb_network_header(skb), doffset);
if (skb_copy_bits(skb,
doffset + offset,
nskb->data + doffset,
@@ -108,7 +109,7 @@
memcpy(nskb->cb, skb->cb, sizeof(skb->cb));
nskb->pkt_type = skb->pkt_type;
- th = (struct tcphdr*)(nskb->nh.raw + iph->ihl*4);
+ th = (struct tcphdr *)(skb_network_header(nskb) + iph->ihl * 4);
iph->tot_len = htons(frag_size + doffset);
iph->id = htons(id);
iph->check = 0;