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[NET]: Move hardware header operations out of netdevice.

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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>
This commit is contained in:
Stephen Hemminger
2007-10-09 01:40:57 -07:00
committed by David S. Miller
parent b95cce3576
commit 3b04ddde02
65 changed files with 479 additions and 473 deletions
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105
drivers/isdn/i4l/isdn_net.c
View File

@@ -1873,54 +1873,14 @@ isdn_net_rcv_skb(int idx, struct sk_buff *skb)
return 0;
}
static int
my_eth_header(struct sk_buff *skb, struct net_device *dev, unsigned short type,
void *daddr, void *saddr, unsigned len)
{
struct ethhdr *eth = (struct ethhdr *) skb_push(skb, ETH_HLEN);
/*
* Set the protocol type. For a packet of type ETH_P_802_3 we
* put the length here instead. It is up to the 802.2 layer to
* carry protocol information.
*/
if (type != ETH_P_802_3)
eth->h_proto = htons(type);
else
eth->h_proto = htons(len);
/*
* Set the source hardware address.
*/
if (saddr)
memcpy(eth->h_source, saddr, dev->addr_len);
else
memcpy(eth->h_source, dev->dev_addr, dev->addr_len);
/*
* Anyway, the loopback-device should never use this function...
*/
if (dev->flags & (IFF_LOOPBACK | IFF_NOARP)) {
memset(eth->h_dest, 0, dev->addr_len);
return ETH_HLEN /*(dev->hard_header_len)*/;
}
if (daddr) {
memcpy(eth->h_dest, daddr, dev->addr_len);
return ETH_HLEN /*dev->hard_header_len*/;
}
return -ETH_HLEN /*dev->hard_header_len*/;
}
/*
* build an header
* depends on encaps that is being used.
*/
static int
isdn_net_header(struct sk_buff *skb, struct net_device *dev, unsigned short type,
void *daddr, void *saddr, unsigned plen)
static int isdn_net_header(struct sk_buff *skb, struct net_device *dev,
unsigned short type,
const void *daddr, const void *saddr, unsigned plen)
{
isdn_net_local *lp = dev->priv;
unsigned char *p;
@@ -1928,7 +1888,7 @@ isdn_net_header(struct sk_buff *skb, struct net_device *dev, unsigned short type
switch (lp->p_encap) {
case ISDN_NET_ENCAP_ETHER:
len = my_eth_header(skb, dev, type, daddr, saddr, plen);
len = eth_header(skb, dev, type, daddr, saddr, plen);
break;
#ifdef CONFIG_ISDN_PPP
case ISDN_NET_ENCAP_SYNCPPP:
@@ -2005,6 +1965,32 @@ isdn_net_rebuild_header(struct sk_buff *skb)
return ret;
}
static int isdn_header_cache(const struct neighbour *neigh, struct hh_cache *hh)
{
const struct net_device *dev = neigh->dev;
isdn_net_local *lp = dev->priv;
if (lp->p_encap == ISDN_NET_ENCAP_ETHER)
return eth_header_cache(neigh, hh);
return -1;
}
static void isdn_header_cache_update(struct hh_cache *hh,
const struct net_device *dev,
const unsigned char *haddr)
{
isdn_net_local *lp = dev->priv;
if (lp->p_encap == ISDN_NET_ENCAP_ETHER)
return eth_header_cache_update(hh, dev, haddr);
}
static const struct header_ops isdn_header_ops = {
.create = isdn_net_header,
.rebuild = isdn_net_rebuild_header,
.cache = isdn_header_cache,
.cache_update = isdn_header_cache_update,
};
/*
* Interface-setup. (just after registering a new interface)
*/
@@ -2012,18 +1998,12 @@ static int
isdn_net_init(struct net_device *ndev)
{
ushort max_hlhdr_len = 0;
isdn_net_local *lp = (isdn_net_local *) ndev->priv;
int drvidx, i;
int drvidx;
ether_setup(ndev);
lp->org_hhc = ndev->hard_header_cache;
lp->org_hcu = ndev->header_cache_update;
ndev->header_ops = NULL;
/* Setup the generic properties */
ndev->hard_header = NULL;
ndev->hard_header_cache = NULL;
ndev->header_cache_update = NULL;
ndev->mtu = 1500;
ndev->flags = IFF_NOARP|IFF_POINTOPOINT;
ndev->type = ARPHRD_ETHER;
@@ -2032,9 +2012,6 @@ isdn_net_init(struct net_device *ndev)
/* for clients with MPPP maybe higher values better */
ndev->tx_queue_len = 30;
for (i = 0; i < ETH_ALEN; i++)
ndev->broadcast[i] = 0xff;
/* The ISDN-specific entries in the device structure. */
ndev->open = &isdn_net_open;
ndev->hard_start_xmit = &isdn_net_start_xmit;
@@ -2052,7 +2029,6 @@ isdn_net_init(struct net_device *ndev)
ndev->hard_header_len = ETH_HLEN + max_hlhdr_len;
ndev->stop = &isdn_net_close;
ndev->get_stats = &isdn_net_get_stats;
ndev->rebuild_header = &isdn_net_rebuild_header;
ndev->do_ioctl = NULL;
return 0;
}
@@ -2861,21 +2837,14 @@ isdn_net_setcfg(isdn_net_ioctl_cfg * cfg)
}
if (cfg->p_encap != lp->p_encap) {
if (cfg->p_encap == ISDN_NET_ENCAP_RAWIP) {
p->dev.hard_header = NULL;
p->dev.hard_header_cache = NULL;
p->dev.header_cache_update = NULL;
p->dev.header_ops = NULL;
p->dev.flags = IFF_NOARP|IFF_POINTOPOINT;
} else {
p->dev.hard_header = isdn_net_header;
if (cfg->p_encap == ISDN_NET_ENCAP_ETHER) {
p->dev.hard_header_cache = lp->org_hhc;
p->dev.header_cache_update = lp->org_hcu;
p->dev.header_ops = &isdn_header_ops;
if (cfg->p_encap == ISDN_NET_ENCAP_ETHER)
p->dev.flags = IFF_BROADCAST | IFF_MULTICAST;
} else {
p->dev.hard_header_cache = NULL;
p->dev.header_cache_update = NULL;
else
p->dev.flags = IFF_NOARP|IFF_POINTOPOINT;
}
}
}
lp->p_encap = cfg->p_encap;
@@ -3127,8 +3096,6 @@ isdn_net_realrm(isdn_net_dev * p, isdn_net_dev * q)
((isdn_net_local *) (p->local->master->priv))->slave = p->local->slave;
} else {
/* Unregister only if it's a master-device */
p->dev.hard_header_cache = p->local->org_hhc;
p->dev.header_cache_update = p->local->org_hcu;
unregister_netdev(&p->dev);
}
/* Unlink device from chain */