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authorStephen Hemminger <shemminger@linux-foundation.org>2007-10-09 01:40:57 -0700
committerDavid S. Miller <davem@sunset.davemloft.net>2007-10-10 16:52:52 -0700
commit3b04ddde02cf1b6f14f2697da5c20eca5715017f (patch)
tree9da1341a5a399a507b5ea6bf5a3047506b8d8f8f /net/ipv4
parentb95cce3576813ac3f86bafa6b5daaaaf7574b0fe (diff)
downloadblackbird-op-linux-3b04ddde02cf1b6f14f2697da5c20eca5715017f.tar.gz
blackbird-op-linux-3b04ddde02cf1b6f14f2697da5c20eca5715017f.zip
[NET]: Move hardware header operations out of netdevice.
Since hardware header operations are part of the protocol class not the device instance, make them into a separate object and save memory. Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4')
-rw-r--r--net/ipv4/arp.c6
-rw-r--r--net/ipv4/ip_gre.c13
-rw-r--r--net/ipv4/ip_output.c2
3 files changed, 14 insertions, 7 deletions
diff --git a/net/ipv4/arp.c b/net/ipv4/arp.c
index 5b24c65b13c6..d8248198bcd7 100644
--- a/net/ipv4/arp.c
+++ b/net/ipv4/arp.c
@@ -253,7 +253,7 @@ static int arp_constructor(struct neighbour *neigh)
neigh->parms = neigh_parms_clone(parms);
rcu_read_unlock();
- if (dev->hard_header == NULL) {
+ if (!dev->header_ops) {
neigh->nud_state = NUD_NOARP;
neigh->ops = &arp_direct_ops;
neigh->output = neigh->ops->queue_xmit;
@@ -310,10 +310,12 @@ static int arp_constructor(struct neighbour *neigh)
neigh->nud_state = NUD_NOARP;
memcpy(neigh->ha, dev->broadcast, dev->addr_len);
}
- if (dev->hard_header_cache)
+
+ if (dev->header_ops->cache)
neigh->ops = &arp_hh_ops;
else
neigh->ops = &arp_generic_ops;
+
if (neigh->nud_state&NUD_VALID)
neigh->output = neigh->ops->connected_output;
else
diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c
index ffa9f1c9dcbb..f151900efaf9 100644
--- a/net/ipv4/ip_gre.c
+++ b/net/ipv4/ip_gre.c
@@ -684,7 +684,7 @@ static int ipgre_tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
goto tx_error;
}
- if (dev->hard_header) {
+ if (dev->header_ops) {
gre_hlen = 0;
tiph = (struct iphdr*)skb->data;
} else {
@@ -1063,8 +1063,9 @@ static int ipgre_tunnel_change_mtu(struct net_device *dev, int new_mtu)
*/
-static int ipgre_header(struct sk_buff *skb, struct net_device *dev, unsigned short type,
- void *daddr, void *saddr, unsigned len)
+static int ipgre_header(struct sk_buff *skb, struct net_device *dev,
+ unsigned short type,
+ const void *daddr, const void *saddr, unsigned len)
{
struct ip_tunnel *t = netdev_priv(dev);
struct iphdr *iph = (struct iphdr *)skb_push(skb, t->hlen);
@@ -1091,6 +1092,10 @@ static int ipgre_header(struct sk_buff *skb, struct net_device *dev, unsigned sh
return -t->hlen;
}
+static const struct header_ops ipgre_header_ops = {
+ .create = ipgre_header,
+};
+
static int ipgre_open(struct net_device *dev)
{
struct ip_tunnel *t = netdev_priv(dev);
@@ -1187,7 +1192,7 @@ static int ipgre_tunnel_init(struct net_device *dev)
if (!iph->saddr)
return -EINVAL;
dev->flags = IFF_BROADCAST;
- dev->hard_header = ipgre_header;
+ dev->header_ops = &ipgre_header_ops;
dev->open = ipgre_open;
dev->stop = ipgre_close;
}
diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c
index 77f67b7cb9bf..699f06781fd8 100644
--- a/net/ipv4/ip_output.c
+++ b/net/ipv4/ip_output.c
@@ -169,7 +169,7 @@ static inline int ip_finish_output2(struct sk_buff *skb)
IP_INC_STATS(IPSTATS_MIB_OUTBCASTPKTS);
/* Be paranoid, rather than too clever. */
- if (unlikely(skb_headroom(skb) < hh_len && dev->hard_header)) {
+ if (unlikely(skb_headroom(skb) < hh_len && dev->header_ops)) {
struct sk_buff *skb2;
skb2 = skb_realloc_headroom(skb, LL_RESERVED_SPACE(dev));
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