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authorArnaldo Carvalho de Melo <acme@redhat.com>2007-04-25 17:55:53 -0700
committerDavid S. Miller <davem@sunset.davemloft.net>2007-04-25 22:25:16 -0700
commitea2ae17d6443abddc79480dc9f7af8feacabddc4 (patch)
tree2d6f48a5e4a40f761b5b510af9aac1fca55004cb /include
parentbadff6d01a8589a1c828b0bf118903ca38627f4e (diff)
[SK_BUFF]: Introduce skb_transport_offset()
For the quite common 'skb->h.raw - skb->data' sequence. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
-rw-r--r--include/linux/skbuff.h5
-rw-r--r--include/net/udplite.h6
2 files changed, 8 insertions, 3 deletions
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 7c1f1756e48..64c3c1687e4 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -962,6 +962,11 @@ static inline void skb_reset_transport_header(struct sk_buff *skb)
skb->h.raw = skb->data;
}
+static inline int skb_transport_offset(const struct sk_buff *skb)
+{
+ return skb->h.raw - skb->data;
+}
+
static inline unsigned char *skb_network_header(const struct sk_buff *skb)
{
return skb->nh.raw;
diff --git a/include/net/udplite.h b/include/net/udplite.h
index d99df75fe54..76503203665 100644
--- a/include/net/udplite.h
+++ b/include/net/udplite.h
@@ -101,14 +101,14 @@ static inline int udplite_sender_cscov(struct udp_sock *up, struct udphdr *uh)
static inline __wsum udplite_csum_outgoing(struct sock *sk, struct sk_buff *skb)
{
- int off, len, cscov = udplite_sender_cscov(udp_sk(sk), skb->h.uh);
+ int cscov = udplite_sender_cscov(udp_sk(sk), skb->h.uh);
__wsum csum = 0;
skb->ip_summed = CHECKSUM_NONE; /* no HW support for checksumming */
skb_queue_walk(&sk->sk_write_queue, skb) {
- off = skb->h.raw - skb->data;
- len = skb->len - off;
+ const int off = skb_transport_offset(skb);
+ const int len = skb->len - off;
csum = skb_checksum(skb, off, (cscov > len)? len : cscov, csum);