PATCH: [SKBUFF] introduce skb_link_header_data_offset(skb)

[Arnaldo Carvalho de Melo <acme@xxxxxxxxxxxxxxxx>]

Hi David,

        Please consider pulling from:

bk://kernel.bkbits.net/acme/sk_buff-2.6

        Now there are 15 outstanding changesets in this tree.

Regards,

- Arnaldo

===================================================================


ChangeSet@xxxxxx, 2004-10-05 17:51:20-03:00, acme@xxxxxxxxxxxxxxxx
  [SKBUFF] introduce skb_link_header_data_offset(skb)
  
  Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxxxxxxxx>
  Signed-off-by: David S. Miller <davem@xxxxxxxxxx>


 include/linux/skbuff.h |    5 +++++
 net/ax25/af_ax25.c     |    4 +++-
 net/packet/af_packet.c |    6 +++---
 3 files changed, 11 insertions(+), 4 deletions(-)


diff -Nru a/include/linux/skbuff.h b/include/linux/skbuff.h
--- a/include/linux/skbuff.h    2004-10-05 17:52:24 -03:00
+++ b/include/linux/skbuff.h    2004-10-05 17:52:24 -03:00
@@ -313,6 +313,11 @@
        return skb->nh.raw - skb->mac.raw;
 }
 
+static inline int skb_link_header_data_offset(const struct sk_buff *skb)
+{
+       return skb->data - skb->mac.raw;
+}
+
 extern void           __kfree_skb(struct sk_buff *skb);
 extern struct sk_buff *alloc_skb(unsigned int size, int priority);
 extern void           kfree_skbmem(struct sk_buff *skb);
diff -Nru a/net/ax25/af_ax25.c b/net/ax25/af_ax25.c
--- a/net/ax25/af_ax25.c        2004-10-05 17:52:24 -03:00
+++ b/net/ax25/af_ax25.c        2004-10-05 17:52:24 -03:00
@@ -1632,7 +1632,9 @@
                ax25_digi digi;
                ax25_address src;
 
-               ax25_addr_parse(skb->mac.raw+1, skb->data-skb->mac.raw-1, &src, 
NULL, &digi, NULL, NULL);
+               ax25_addr_parse(skb->mac.raw + 1,
+                               skb_link_header_data_offset(skb) - 1,
+                               &src, NULL, &digi, NULL, NULL);
 
                sax->sax25_family = AF_AX25;
                /* We set this correctly, even though we may not let the
diff -Nru a/net/packet/af_packet.c b/net/packet/af_packet.c
--- a/net/packet/af_packet.c    2004-10-05 17:52:24 -03:00
+++ b/net/packet/af_packet.c    2004-10-05 17:52:24 -03:00
@@ -274,7 +274,7 @@
 
        spkt = (struct sockaddr_pkt*)skb->cb;
 
-       skb_push(skb, skb->data-skb->mac.raw);
+       skb_push(skb, skb_link_header_data_offset(skb));
 
        /*
         *      The SOCK_PACKET socket receives _all_ frames.
@@ -462,7 +462,7 @@
                   never delivered to user.
                 */
                if (sk->sk_type != SOCK_DGRAM)
-                       skb_push(skb, skb->data - skb->mac.raw);
+                       skb_push(skb, skb_link_header_data_offset(skb));
                else if (skb->pkt_type == PACKET_OUTGOING) {
                        /* Special case: outgoing packets have ll header at 
head */
                        skb_pull(skb, skb->nh.raw - skb->data);
@@ -559,7 +559,7 @@
 
        if (dev->hard_header) {
                if (sk->sk_type != SOCK_DGRAM)
-                       skb_push(skb, skb->data - skb->mac.raw);
+                       skb_push(skb, skb_link_header_data_offset(skb));
                else if (skb->pkt_type == PACKET_OUTGOING) {
                        /* Special case: outgoing packets have ll header at 
head */
                        skb_pull(skb, skb->nh.raw - skb->data);