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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

50
drivers/net/plip.c
View File

@@ -148,9 +148,9 @@ static void plip_interrupt(int irq, void *dev_id);
/* Functions for DEV methods */
static int plip_tx_packet(struct sk_buff *skb, struct net_device *dev);
static int plip_hard_header(struct sk_buff *skb, struct net_device *dev,
unsigned short type, void *daddr,
void *saddr, unsigned len);
static int plip_hard_header_cache(struct neighbour *neigh,
unsigned short type, const void *daddr,
const void *saddr, unsigned len);
static int plip_hard_header_cache(const struct neighbour *neigh,
struct hh_cache *hh);
static int plip_open(struct net_device *dev);
static int plip_close(struct net_device *dev);
@@ -219,11 +219,6 @@ struct net_local {
int is_deferred;
int port_owner;
int should_relinquish;
int (*orig_hard_header)(struct sk_buff *skb, struct net_device *dev,
unsigned short type, void *daddr,
void *saddr, unsigned len);
int (*orig_hard_header_cache)(struct neighbour *neigh,
struct hh_cache *hh);
spinlock_t lock;
atomic_t kill_timer;
struct semaphore killed_timer_sem;
@@ -265,6 +260,11 @@ static inline unsigned char read_status (struct net_device *dev)
return port->ops->read_status (port);
}
static const struct header_ops plip_header_ops = {
.create = plip_hard_header,
.cache = plip_hard_header_cache,
};
/* Entry point of PLIP driver.
Probe the hardware, and register/initialize the driver.
@@ -284,17 +284,12 @@ plip_init_netdev(struct net_device *dev)
dev->open = plip_open;
dev->stop = plip_close;
dev->do_ioctl = plip_ioctl;
dev->header_cache_update = NULL;
dev->tx_queue_len = 10;
dev->flags = IFF_POINTOPOINT|IFF_NOARP;
memset(dev->dev_addr, 0xfc, ETH_ALEN);
/* Set the private structure */
nl->orig_hard_header = dev->hard_header;
dev->hard_header = plip_hard_header;
nl->orig_hard_header_cache = dev->hard_header_cache;
dev->hard_header_cache = plip_hard_header_cache;
dev->header_ops = &plip_header_ops;
nl->port_owner = 0;
@@ -993,14 +988,14 @@ plip_tx_packet(struct sk_buff *skb, struct net_device *dev)
}
static void
plip_rewrite_address(struct net_device *dev, struct ethhdr *eth)
plip_rewrite_address(const struct net_device *dev, struct ethhdr *eth)
{
struct in_device *in_dev;
const struct in_device *in_dev = dev->ip_ptr;
if ((in_dev=dev->ip_ptr) != NULL) {
if (in_dev) {
/* Any address will do - we take the first */
struct in_ifaddr *ifa=in_dev->ifa_list;
if (ifa != NULL) {
const struct in_ifaddr *ifa = in_dev->ifa_list;
if (ifa) {
memcpy(eth->h_source, dev->dev_addr, 6);
memset(eth->h_dest, 0xfc, 2);
memcpy(eth->h_dest+2, &ifa->ifa_address, 4);
@@ -1010,26 +1005,25 @@ plip_rewrite_address(struct net_device *dev, struct ethhdr *eth)
static int
plip_hard_header(struct sk_buff *skb, struct net_device *dev,
unsigned short type, void *daddr,
void *saddr, unsigned len)
unsigned short type, const void *daddr,
const void *saddr, unsigned len)
{
struct net_local *nl = netdev_priv(dev);
int ret;
if ((ret = nl->orig_hard_header(skb, dev, type, daddr, saddr, len)) >= 0)
ret = eth_header(skb, dev, type, daddr, saddr, len);
if (ret >= 0)
plip_rewrite_address (dev, (struct ethhdr *)skb->data);
return ret;
}
int plip_hard_header_cache(struct neighbour *neigh,
int plip_hard_header_cache(const struct neighbour *neigh,
struct hh_cache *hh)
{
struct net_local *nl = neigh->dev->priv;
int ret;
if ((ret = nl->orig_hard_header_cache(neigh, hh)) == 0)
{
ret = eth_header_cache(neigh, hh);
if (ret == 0) {
struct ethhdr *eth;
eth = (struct ethhdr*)(((u8*)hh->hh_data) +