[SK_BUFF]: Introduce skb_transport_header(skb)

For the places where we need a pointer to the transport header, it is
still legal to touch skb->h.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>

1 files changed, 9 insertions, 8 deletions

diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
index 8b946f56287a..f9a85ab594db 100644
--- a/net/ipv6/ndisc.c
+++ b/net/ipv6/ndisc.c
@@ -760,7 +760,7 @@ static void ndisc_solicit(struct neighbour *neigh, struct sk_buff *skb)
 
 static void ndisc_recv_ns(struct sk_buff *skb)
 {
-        struct nd_msg *msg = (struct nd_msg *)skb->h.raw;
+        struct nd_msg *msg = (struct nd_msg *)skb_transport_header(skb);
         struct in6_addr *saddr = &ipv6_hdr(skb)->saddr;
         struct in6_addr *daddr = &ipv6_hdr(skb)->daddr;
         u8 *lladdr = NULL;
@@ -938,7 +938,7 @@ out:
 
 static void ndisc_recv_na(struct sk_buff *skb)
 {
-        struct nd_msg *msg = (struct nd_msg *)skb->h.raw;
+        struct nd_msg *msg = (struct nd_msg *)skb_transport_header(skb);
         struct in6_addr *saddr = &ipv6_hdr(skb)->saddr;
         struct in6_addr *daddr = &ipv6_hdr(skb)->daddr;
         u8 *lladdr = NULL;
@@ -1040,7 +1040,7 @@ out:
 
 static void ndisc_recv_rs(struct sk_buff *skb)
 {
-        struct rs_msg *rs_msg = (struct rs_msg *) skb->h.raw;
+        struct rs_msg *rs_msg = (struct rs_msg *)skb_transport_header(skb);
         unsigned long ndoptlen = skb->len - sizeof(*rs_msg);
         struct neighbour *neigh;
         struct inet6_dev *idev;
@@ -1097,7 +1097,7 @@ out:
 
 static void ndisc_router_discovery(struct sk_buff *skb)
 {
-        struct ra_msg *ra_msg = (struct ra_msg *) skb->h.raw;
+        struct ra_msg *ra_msg = (struct ra_msg *)skb_transport_header(skb);
         struct neighbour *neigh = NULL;
         struct inet6_dev *in6_dev;
         struct rt6_info *rt = NULL;
@@ -1108,7 +1108,8 @@ static void ndisc_router_discovery(struct sk_buff *skb)
 
         __u8 * opt = (__u8 *)(ra_msg + 1);
 
-        optlen = (skb->tail - skb->h.raw) - sizeof(struct ra_msg);
+        optlen = (skb->tail - skb_transport_header(skb)) -
+                  sizeof(struct ra_msg);
 
         if (!(ipv6_addr_type(&ipv6_hdr(skb)->saddr) & IPV6_ADDR_LINKLOCAL)) {
                 ND_PRINTK2(KERN_WARNING
@@ -1357,7 +1358,7 @@ static void ndisc_redirect_rcv(struct sk_buff *skb)
                 return;
         }
 
-        optlen = skb->tail - skb->h.raw;
+        optlen = skb->tail - skb_transport_header(skb);
         optlen -= sizeof(struct icmp6hdr) + 2 * sizeof(struct in6_addr);
 
         if (optlen < 0) {
@@ -1584,9 +1585,9 @@ int ndisc_rcv(struct sk_buff *skb)
         if (!pskb_may_pull(skb, skb->len))
                 return 0;
 
-        msg = (struct nd_msg *) skb->h.raw;
+        msg = (struct nd_msg *)skb_transport_header(skb);
 
-        __skb_push(skb, skb->data-skb->h.raw);
+        __skb_push(skb, skb->data - skb_transport_header(skb));
 
         if (ipv6_hdr(skb)->hop_limit != 255) {
                 ND_PRINTK2(KERN_WARNING