PATCH: [SKBUFF] Introduce skb_set_link_header_offset(skb, offset)

[Arnaldo Carvalho de Melo <acme@xxxxxxxxxxxxxxxx>]

Hi David,

        Please consider pulling from:

bk://kernel.bkbits.net/acme/sk_buff-2.4

        Now there are 14 outstanding changesets in this tree.

Regards,

- Arnaldo
===================================================================


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


 drivers/net/loopback.c       |    2 +-
 drivers/net/myri_sbus.c      |    2 +-
 drivers/s390/net/qeth_main.c |    2 +-
 include/linux/skbuff.h       |    6 ++++++
 net/atm/br2684.c             |    2 +-
 5 files changed, 10 insertions(+), 4 deletions(-)


diff -Nru a/drivers/net/loopback.c b/drivers/net/loopback.c
--- a/drivers/net/loopback.c    2004-10-05 17:06:15 -03:00
+++ b/drivers/net/loopback.c    2004-10-05 17:06:15 -03:00
@@ -85,7 +85,7 @@
                if (!nskb)
                        break;
                skb_reserve(nskb, 32);
-               nskb->mac.raw = nskb->data - ETH_HLEN;
+               skb_set_link_header_offset(nskb, -ETH_HLEN);
                nskb->nh.raw = nskb->data;
                iph = nskb->nh.iph;
                memcpy(nskb->data, skb->nh.raw, doffset);
diff -Nru a/drivers/net/myri_sbus.c b/drivers/net/myri_sbus.c
--- a/drivers/net/myri_sbus.c   2004-10-05 17:06:15 -03:00
+++ b/drivers/net/myri_sbus.c   2004-10-05 17:06:15 -03:00
@@ -374,7 +374,7 @@
        struct ethhdr *eth;
        unsigned char *rawp;
        
-       skb->mac.raw = (((unsigned char *)skb->data) + MYRI_PAD_LEN);
+       skb_set_link_header_offset(skb, MYRI_PAD_LEN);
        skb_pull(skb, dev->hard_header_len);
        eth = eth_hdr(skb);
        
diff -Nru a/drivers/s390/net/qeth_main.c b/drivers/s390/net/qeth_main.c
--- a/drivers/s390/net/qeth_main.c      2004-10-05 17:06:15 -03:00
+++ b/drivers/s390/net/qeth_main.c      2004-10-05 17:06:15 -03:00
@@ -2173,7 +2173,7 @@
        struct iphdr *ip_hdr;
 
        QETH_DBF_TEXT(trace,5,"skbfake");
-       skb->mac.raw = skb->data - QETH_FAKE_LL_LEN;
+       skb_set_link_header_offset(skb, -QETH_FAKE_LL_LEN);
        /* this is a fake ethernet header */
        fake_hdr = eth_hdr(skb);
 
diff -Nru a/include/linux/skbuff.h b/include/linux/skbuff.h
--- a/include/linux/skbuff.h    2004-10-05 17:06:15 -03:00
+++ b/include/linux/skbuff.h    2004-10-05 17:06:15 -03:00
@@ -295,6 +295,12 @@
        skb->mac.raw = skb->data;
 }
 
+static inline void skb_set_link_header_offset(struct sk_buff *skb,
+                                             const int offset)
+{
+       skb->mac.raw = skb->data + offset;
+}
+
 static inline int skb_valid_link_header(const struct sk_buff *skb,
                                        const int hdrlen)
 {
diff -Nru a/net/atm/br2684.c b/net/atm/br2684.c
--- a/net/atm/br2684.c  2004-10-05 17:06:15 -03:00
+++ b/net/atm/br2684.c  2004-10-05 17:06:15 -03:00
@@ -460,7 +460,7 @@
        /* FIXME: tcpdump shows that pointer to mac header is 2 bytes earlier,
           than should be. What else should I set? */
        skb_pull(skb, plen);
-       skb->mac.raw = ((char *) (skb->data)) - ETH_HLEN;
+       skb_set_link_header_offset(skb, -ETH_HLEN);
        skb->pkt_type = PACKET_HOST;
 #ifdef CONFIG_BR2684_FAST_TRANS
        skb->protocol = ((u16 *) skb->data)[-1];