[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>

65 files changed, 481 insertions, 475 deletions

diff --git a/drivers/ieee1394/eth1394.c b/drivers/ieee1394/eth1394.c
index b31f90082e3..dc9dce22f6a 100644
--- a/drivers/ieee1394/eth1394.c
+++ b/drivers/ieee1394/eth1394.c
@@ -159,15 +159,16 @@ MODULE_PARM_DESC(max_partial_datagrams,
 
 
 static int ether1394_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);
 static int ether1394_rebuild_header(struct sk_buff *skb);
 static int ether1394_header_parse(const struct sk_buff *skb,
 				  unsigned char *haddr);
-static int ether1394_header_cache(struct neighbour *neigh, struct hh_cache *hh);
+static int ether1394_header_cache(const struct neighbour *neigh,
+				  struct hh_cache *hh);
 static void ether1394_header_cache_update(struct hh_cache *hh,
-					  struct net_device *dev,
-					  unsigned char *haddr);
+					  const struct net_device *dev,
+					  const unsigned char *haddr);
 static int ether1394_tx(struct sk_buff *skb, struct net_device *dev);
 static void ether1394_iso(struct hpsb_iso *iso);
 
@@ -507,6 +508,14 @@ static void ether1394_reset_priv(struct net_device *dev, int set_mtu)
 	spin_unlock_irqrestore(&priv->lock, flags);
 }
 
+static const struct header_ops ether1394_header_ops = {
+	.create		= ether1394_header,
+	.rebuild	= ether1394_rebuild_header,
+	.cache  	= ether1394_header_cache,
+	.cache_update	= ether1394_header_cache_update,
+	.parse		= ether1394_header_parse,
+};
+
 static void ether1394_init_dev(struct net_device *dev)
 {
 	dev->open		= ether1394_open;
@@ -516,11 +525,7 @@ static void ether1394_init_dev(struct net_device *dev)
 	dev->tx_timeout		= ether1394_tx_timeout;
 	dev->change_mtu		= ether1394_change_mtu;
 
-	dev->hard_header	= ether1394_header;
-	dev->rebuild_header	= ether1394_rebuild_header;
-	dev->hard_header_cache	= ether1394_header_cache;
-	dev->header_cache_update= ether1394_header_cache_update;
-	dev->hard_header_parse	= ether1394_header_parse;
+	dev->header_ops		= &ether1394_header_ops;
 
 	SET_ETHTOOL_OPS(dev, &ethtool_ops);
 
@@ -711,8 +716,8 @@ static void ether1394_host_reset(struct hpsb_host *host)
  * saddr=NULL means use device source address
  * daddr=NULL means leave destination address (eg unresolved arp). */
 static int ether1394_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 eth1394hdr *eth =
 			(struct eth1394hdr *)skb_push(skb, ETH1394_HLEN);
@@ -759,7 +764,8 @@ static int ether1394_header_parse(const struct sk_buff *skb,
 	return ETH1394_ALEN;
 }
 
-static int ether1394_header_cache(struct neighbour *neigh, struct hh_cache *hh)
+static int ether1394_header_cache(const struct neighbour *neigh,
+				  struct hh_cache *hh)
 {
 	unsigned short type = hh->hh_type;
 	struct net_device *dev = neigh->dev;
@@ -778,8 +784,8 @@ static int ether1394_header_cache(struct neighbour *neigh, struct hh_cache *hh)
 
 /* Called by Address Resolution module to notify changes in address. */
 static void ether1394_header_cache_update(struct hh_cache *hh,
-					  struct net_device *dev,
-					  unsigned char * haddr)
+					  const struct net_device *dev,
+					  const unsigned char * haddr)
 {
 	memcpy((u8 *)hh->hh_data + 16 - ETH1394_HLEN, haddr, dev->addr_len);
 }
@@ -899,8 +905,8 @@ static u16 ether1394_parse_encap(struct sk_buff *skb, struct net_device *dev,
 	}
 
 	/* Now add the ethernet header. */
-	if (dev->hard_header(skb, dev, ntohs(ether_type), &dest_hw, NULL,
-			     skb->len) >= 0)
+	if (dev_hard_header(skb, dev, ntohs(ether_type), &dest_hw, NULL,
+			    skb->len) >= 0)
 		ret = ether1394_type_trans(skb, dev);
 
 	return ret;
diff --git a/drivers/infiniband/ulp/ipoib/ipoib_main.c b/drivers/infiniband/ulp/ipoib/ipoib_main.c
index b1c3d6cd8eb..2bd76ef5715 100644
--- a/drivers/infiniband/ulp/ipoib/ipoib_main.c
+++ b/drivers/infiniband/ulp/ipoib/ipoib_main.c
@@ -780,7 +780,7 @@ static void ipoib_timeout(struct net_device *dev)
 static int ipoib_hard_header(struct sk_buff *skb,
 			     struct net_device *dev,
 			     unsigned short type,
-			     void *daddr, void *saddr, unsigned len)
+			     const void *daddr, const void *saddr, unsigned len)
 {
 	struct ipoib_header *header;
 
@@ -940,6 +940,10 @@ void ipoib_dev_cleanup(struct net_device *dev)
 	priv->tx_ring = NULL;
 }
 
+static const struct header_ops ipoib_header_ops = {
+	.create	= ipoib_hard_header,
+};
+
 static void ipoib_setup(struct net_device *dev)
 {
 	struct ipoib_dev_priv *priv = netdev_priv(dev);
@@ -950,7 +954,7 @@ static void ipoib_setup(struct net_device *dev)
 	dev->hard_start_xmit 	 = ipoib_start_xmit;
 	dev->get_stats 		 = ipoib_get_stats;
 	dev->tx_timeout 	 = ipoib_timeout;
-	dev->hard_header 	 = ipoib_hard_header;
+	dev->header_ops 	 = &ipoib_header_ops;
 	dev->set_multicast_list  = ipoib_set_mcast_list;
 	dev->neigh_setup         = ipoib_neigh_setup_dev;
 
diff --git a/drivers/isdn/i4l/isdn_net.c b/drivers/isdn/i4l/isdn_net.c
index aa83277aba7..54546604656 100644
--- a/drivers/isdn/i4l/isdn_net.c
+++ b/drivers/isdn/i4l/isdn_net.c
@@ -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 */
diff --git a/drivers/media/dvb/dvb-core/dvb_net.c b/drivers/media/dvb/dvb-core/dvb_net.c
index bdd797071cb..06800e5a077 100644
--- a/drivers/media/dvb/dvb-core/dvb_net.c
+++ b/drivers/media/dvb/dvb-core/dvb_net.c
@@ -1225,10 +1225,17 @@ static struct net_device_stats * dvb_net_get_stats(struct net_device *dev)
 	return &((struct dvb_net_priv*) dev->priv)->stats;
 }
 
+static const struct header_ops dvb_header_ops = {
+	.create		= eth_header,
+	.parse		= eth_header_parse,
+	.rebuild	= eth_rebuild_header,
+};
+
 static void dvb_net_setup(struct net_device *dev)
 {
 	ether_setup(dev);
 
+	dev->header_ops		= &dvb_header_ops;
 	dev->open		= dvb_net_open;
 	dev->stop		= dvb_net_stop;
 	dev->hard_start_xmit	= dvb_net_tx;
@@ -1237,7 +1244,7 @@ static void dvb_net_setup(struct net_device *dev)
 	dev->set_mac_address    = dvb_net_set_mac;
 	dev->mtu		= 4096;
 	dev->mc_count           = 0;
-	dev->hard_header_cache  = NULL;
+
 	dev->flags |= IFF_NOARP;
 }
 
diff --git a/drivers/net/appletalk/cops.c b/drivers/net/appletalk/cops.c
index c4b560d42a6..92c3a4cf0bb 100644
--- a/drivers/net/appletalk/cops.c
+++ b/drivers/net/appletalk/cops.c
@@ -194,10 +194,6 @@ static void cops_timeout(struct net_device *dev);
 static void cops_rx (struct net_device *dev);
 static int  cops_send_packet (struct sk_buff *skb, struct net_device *dev);
 static void set_multicast_list (struct net_device *dev);
-static int  cops_hard_header (struct sk_buff *skb, struct net_device *dev,
-			      unsigned short type, void *daddr, void *saddr, 
-			      unsigned len);
-
 static int  cops_ioctl (struct net_device *dev, struct ifreq *rq, int cmd);
 static int  cops_close (struct net_device *dev);
 static struct net_device_stats *cops_get_stats (struct net_device *dev);
@@ -331,7 +327,6 @@ static int __init cops_probe1(struct net_device *dev, int ioaddr)
 	dev->base_addr = ioaddr;
 
         lp = netdev_priv(dev);
-        memset(lp, 0, sizeof(struct cops_local));
         spin_lock_init(&lp->lock);
 
 	/* Copy local board variable to lp struct. */
@@ -340,7 +335,7 @@ static int __init cops_probe1(struct net_device *dev, int ioaddr)
 	dev->hard_start_xmit    = cops_send_packet;
 	dev->tx_timeout		= cops_timeout;
 	dev->watchdog_timeo	= HZ * 2;
-	dev->hard_header	= cops_hard_header;
+
         dev->get_stats          = cops_get_stats;
 	dev->open               = cops_open;
         dev->stop               = cops_close;
@@ -945,19 +940,6 @@ static void set_multicast_list(struct net_device *dev)
 }
 
 /*
- *      Another Dummy function to keep the Appletalk layer happy.
- */
- 
-static int cops_hard_header(struct sk_buff *skb, struct net_device *dev,
-			    unsigned short type, void *daddr, void *saddr, 
-			    unsigned len)
-{
-        if(cops_debug >= 3)
-                printk("%s: cops_hard_header executed. Wow!\n", dev->name);
-        return 0;
-}
-
-/*
  *      System ioctls for the COPS LocalTalk card.
  */
  
diff --git a/drivers/net/appletalk/ltpc.c b/drivers/net/appletalk/ltpc.c
index cb4744e5690..6ab2c2d4d67 100644
--- a/drivers/net/appletalk/ltpc.c
+++ b/drivers/net/appletalk/ltpc.c
@@ -870,15 +870,6 @@ static void set_multicast_list(struct net_device *dev)
 	/* Actually netatalk needs fixing! */
 }
 
-static int ltpc_hard_header (struct sk_buff *skb, struct net_device *dev, 
-	unsigned short type, void *daddr, void *saddr, unsigned len)
-{
-	if(debug & DEBUG_VERBOSE)
-		printk("ltpc_hard_header called for device %s\n",
-			dev->name);
-	return 0;
-}
-
 static int ltpc_poll_counter;
 
 static void ltpc_poll(unsigned long l)
@@ -1141,7 +1132,6 @@ struct net_device * __init ltpc_probe(void)
 
 	/* Fill in the fields of the device structure with ethernet-generic values. */
 	dev->hard_start_xmit = ltpc_xmit;
-	dev->hard_header = ltpc_hard_header;
 	dev->get_stats = ltpc_get_stats;
 
 	/* add the ltpc-specific things */
diff --git a/drivers/net/arcnet/arcnet.c b/drivers/net/arcnet/arcnet.c
index 681e20b8466..c59c8067de9 100644
--- a/drivers/net/arcnet/arcnet.c
+++ b/drivers/net/arcnet/arcnet.c
@@ -102,8 +102,8 @@ static int arcnet_close(struct net_device *dev);
 static int arcnet_send_packet(struct sk_buff *skb, struct net_device *dev);
 static void arcnet_timeout(struct net_device *dev);
 static int arcnet_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);
 static int arcnet_rebuild_header(struct sk_buff *skb);
 static struct net_device_stats *arcnet_get_stats(struct net_device *dev);
 static int go_tx(struct net_device *dev);
@@ -317,11 +317,17 @@ static int choose_mtu(void)
 	return mtu == 65535 ? XMTU : mtu;
 }
 
+static const struct header_ops arcnet_header_ops = {
+	.create = arcnet_header,
+	.rebuild = arcnet_rebuild_header,
+};
+
 
 /* Setup a struct device for ARCnet. */
 static void arcdev_setup(struct net_device *dev)
 {
 	dev->type = ARPHRD_ARCNET;
+	dev->header_ops = &arcnet_header_ops;
 	dev->hard_header_len = sizeof(struct archdr);
 	dev->mtu = choose_mtu();
 
@@ -342,8 +348,6 @@ static void arcdev_setup(struct net_device *dev)
 	dev->hard_start_xmit = arcnet_send_packet;
 	dev->tx_timeout = arcnet_timeout;
 	dev->get_stats = arcnet_get_stats;
-	dev->hard_header = arcnet_header;
-	dev->rebuild_header = arcnet_rebuild_header;
 }
 
 struct net_device *alloc_arcdev(char *name)
@@ -488,10 +492,10 @@ static int arcnet_close(struct net_device *dev)
 
 
 static int arcnet_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 arcnet_local *lp = dev->priv;
+	const struct arcnet_local *lp = netdev_priv(dev);
 	uint8_t _daddr, proto_num;
 	struct ArcProto *proto;
 
diff --git a/drivers/net/hamradio/6pack.c b/drivers/net/hamradio/6pack.c
index 0a847326a5e..ecd156def03 100644
--- a/drivers/net/hamradio/6pack.c
+++ b/drivers/net/hamradio/6pack.c
@@ -288,7 +288,8 @@ static int sp_close(struct net_device *dev)
 
 /* Return the frame type ID */
 static int sp_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)
 {
 #ifdef CONFIG_INET
 	if (type != htons(ETH_P_AX25))
@@ -323,6 +324,11 @@ static int sp_rebuild_header(struct sk_buff *skb)
 #endif
 }
 
+static const struct header_ops sp_header_ops = {
+	.create		= sp_header,
+	.rebuild	= sp_rebuild_header,
+};
+
 static void sp_setup(struct net_device *dev)
 {
 	/* Finish setting up the DEVICE info. */
@@ -331,14 +337,15 @@ static void sp_setup(struct net_device *dev)
 	dev->open		= sp_open_dev;
 	dev->destructor		= free_netdev;
 	dev->stop		= sp_close;
-	dev->hard_header	= sp_header;
+
 	dev->get_stats	        = sp_get_stats;
 	dev->set_mac_address    = sp_set_mac_address;
 	dev->hard_header_len	= AX25_MAX_HEADER_LEN;
+	dev->header_ops 	= &sp_header_ops;
+
 	dev->addr_len		= AX25_ADDR_LEN;
 	dev->type		= ARPHRD_AX25;
 	dev->tx_queue_len	= 10;
-	dev->rebuild_header	= sp_rebuild_header;
 	dev->tx_timeout		= NULL;
 
 	/* Only activated in AX.25 mode */
diff --git a/drivers/net/hamradio/baycom_epp.c b/drivers/net/hamradio/baycom_epp.c
index 355c6cf3d11..1a5a75acf73 100644
--- a/drivers/net/hamradio/baycom_epp.c
+++ b/drivers/net/hamradio/baycom_epp.c
@@ -1159,8 +1159,7 @@ static void baycom_probe(struct net_device *dev)
 	/* Fill in the fields of the device structure */
 	bc->skb = NULL;
 	
-	dev->hard_header = ax25_hard_header;
-	dev->rebuild_header = ax25_rebuild_header;
+	dev->header_ops = &ax25_header_ops;
 	dev->set_mac_address = baycom_set_mac_address;
 	
 	dev->type = ARPHRD_AX25;           /* AF_AX25 device */
diff --git a/drivers/net/hamradio/bpqether.c b/drivers/net/hamradio/bpqether.c
index 4bff23e3b97..5ddf8b0c34f 100644
--- a/drivers/net/hamradio/bpqether.c
+++ b/drivers/net/hamradio/bpqether.c
@@ -483,8 +483,7 @@ static void bpq_setup(struct net_device *dev)