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[SK_BUFF]: Introduce skb_reset_network_header(skb)

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For the common, open coded 'skb->nh.raw = skb->data' operation, so that we can
later turn skb->nh.raw into a offset, reducing the size of struct sk_buff in
64bit land while possibly keeping it as a pointer on 32bit.

This one touches just the most simple case, next will handle the slightly more
"complex" cases.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Arnaldo Carvalho de Melo
2007-04-10 20:45:18 -07:00
committed by David S. Miller
parent 57effc70a5
commit c1d2bbe1cd
47 changed files with 78 additions and 68 deletions
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5
net/core/dev.c
View File

@@ -1074,7 +1074,7 @@ static void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev)
printk(KERN_CRIT "protocol %04x is "
"buggy, dev %s\n",
skb2->protocol, dev->name);
skb2->nh.raw = skb2->data;
skb_reset_network_header(skb2);
}
skb2->h.raw = skb2->nh.raw;
@@ -1771,7 +1771,8 @@ int netif_receive_skb(struct sk_buff *skb)
__get_cpu_var(netdev_rx_stat).total++;
skb->h.raw = skb->nh.raw = skb->data;
skb_reset_network_header(skb);
skb->h.raw = skb->data;
skb->mac_len = skb->nh.raw - skb->mac.raw;
pt_prev = NULL;

5
net/core/netpoll.c
View File

@@ -359,7 +359,8 @@ static void arp_reply(struct sk_buff *skb)
(2 * sizeof(u32)))))
return;
skb->h.raw = skb->nh.raw = skb->data;
skb_reset_network_header(skb);
skb->h.raw = skb->data;
arp = skb->nh.arph;
if ((arp->ar_hrd != htons(ARPHRD_ETHER) &&
@@ -389,7 +390,7 @@ static void arp_reply(struct sk_buff *skb)
if (!send_skb)
return;
send_skb->nh.raw = send_skb->data;
skb_reset_network_header(send_skb);
arp = (struct arphdr *) skb_put(send_skb, size);
send_skb->dev = skb->dev;
send_skb->protocol = htons(ETH_P_ARP);