[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>
diff --git a/drivers/net/plip.c b/drivers/net/plip.c
index c17d9ac..b5e9981 100644
--- a/drivers/net/plip.c
+++ b/drivers/net/plip.c
@@ -148,9 +148,9 @@
/* 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 @@
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 @@
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 @@
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 @@
}
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 @@
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) +