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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
Download patch file Download diff file Expand all files Collapse all files

36
net/ethernet/eth.c
View file

@ -75,8 +75,9 @@ __setup("ether=", netdev_boot_setup);
* Set the protocol type. For a packet of type ETH_P_802_3 we put the length
* in here instead. It is up to the 802.2 layer to carry protocol information.
*/
int eth_header(struct sk_buff *skb, struct net_device *dev, unsigned short type,
void *daddr, void *saddr, unsigned len)
int eth_header(struct sk_buff *skb, struct net_device *dev,
unsigned short type,
const void *daddr, const void *saddr, unsigned len)
{
struct ethhdr *eth = (struct ethhdr *)skb_push(skb, ETH_HLEN);
@ -109,6 +110,7 @@ int eth_header(struct sk_buff *skb, struct net_device *dev, unsigned short type,
return -ETH_HLEN;
}
EXPORT_SYMBOL(eth_header);
/**
* eth_rebuild_header- rebuild the Ethernet MAC header.
@ -141,6 +143,7 @@ int eth_rebuild_header(struct sk_buff *skb)
return 0;
}
EXPORT_SYMBOL(eth_rebuild_header);
/**
* eth_type_trans - determine the packet's protocol ID.
@ -207,12 +210,13 @@ EXPORT_SYMBOL(eth_type_trans);
* @skb: packet to extract header from
* @haddr: destination buffer
*/
static int eth_header_parse(const struct sk_buff *skb, unsigned char *haddr)
int eth_header_parse(const struct sk_buff *skb, unsigned char *haddr)
{
const struct ethhdr *eth = eth_hdr(skb);
memcpy(haddr, eth->h_source, ETH_ALEN);
return ETH_ALEN;
}
EXPORT_SYMBOL(eth_header_parse);
/**
* eth_header_cache - fill cache entry from neighbour
@ -220,11 +224,11 @@ static int eth_header_parse(const struct sk_buff *skb, unsigned char *haddr)
* @hh: destination cache entry
* Create an Ethernet header template from the neighbour.
*/
int eth_header_cache(struct neighbour *neigh, struct hh_cache *hh)
int eth_header_cache(const struct neighbour *neigh, struct hh_cache *hh)
{
__be16 type = hh->hh_type;
struct ethhdr *eth;
struct net_device *dev = neigh->dev;
const struct net_device *dev = neigh->dev;
eth = (struct ethhdr *)
(((u8 *) hh->hh_data) + (HH_DATA_OFF(sizeof(*eth))));
@ -238,6 +242,7 @@ int eth_header_cache(struct neighbour *neigh, struct hh_cache *hh)
hh->hh_len = ETH_HLEN;
return 0;
}
EXPORT_SYMBOL(eth_header_cache);
/**
* eth_header_cache_update - update cache entry
@ -247,12 +252,14 @@ int eth_header_cache(struct neighbour *neigh, struct hh_cache *hh)
*
* Called by Address Resolution module to notify changes in address.
*/
void eth_header_cache_update(struct hh_cache *hh, struct net_device *dev,
unsigned char *haddr)
void eth_header_cache_update(struct hh_cache *hh,
const struct net_device *dev,
const unsigned char *haddr)
{
memcpy(((u8 *) hh->hh_data) + HH_DATA_OFF(sizeof(struct ethhdr)),
haddr, ETH_ALEN);
}
EXPORT_SYMBOL(eth_header_cache_update);
/**
* eth_mac_addr - set new Ethernet hardware address
@ -291,6 +298,14 @@ static int eth_change_mtu(struct net_device *dev, int new_mtu)
return 0;
}
const struct header_ops eth_header_ops ____cacheline_aligned = {
.create = eth_header,
.parse = eth_header_parse,
.rebuild = eth_rebuild_header,
.cache = eth_header_cache,
.cache_update = eth_header_cache_update,
};
/**
* ether_setup - setup Ethernet network device
* @dev: network device
@ -298,13 +313,10 @@ static int eth_change_mtu(struct net_device *dev, int new_mtu)
*/
void ether_setup(struct net_device *dev)
{
dev->header_ops = &eth_header_ops;
dev->change_mtu = eth_change_mtu;
dev->hard_header = eth_header;
dev->rebuild_header = eth_rebuild_header;
dev->set_mac_address = eth_mac_addr;
dev->hard_header_cache = eth_header_cache;
dev->header_cache_update= eth_header_cache_update;
dev->hard_header_parse = eth_header_parse;
dev->type = ARPHRD_ETHER;
dev->hard_header_len = ETH_HLEN;