*** empty log message ***

1 files changed, 2868 insertions, 0 deletions

diff --git a/kernel/linux2.5/net/core/dev.c b/kernel/linux2.5/net/core/dev.c
new file mode 100644
index 0000000..e5d9d21
--- /dev/null
+++ b/kernel/linux2.5/net/core/dev.c
@@ -0,0 +1,2868 @@
+/*
+ * 	NET3	Protocol independent device support routines.
+ *
+ *		This program is free software; you can redistribute it and/or
+ *		modify it under the terms of the GNU General Public License
+ *		as published by the Free Software Foundation; either version
+ *		2 of the License, or (at your option) any later version.
+ *
+ *	Derived from the non IP parts of dev.c 1.0.19
+ * 		Authors:	Ross Biro, <bir7@leland.Stanford.Edu>
+ *				Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
+ *				Mark Evans, <evansmp@uhura.aston.ac.uk>
+ *
+ *	Additional Authors:
+ *		Florian la Roche <rzsfl@rz.uni-sb.de>
+ *		Alan Cox <gw4pts@gw4pts.ampr.org>
+ *		David Hinds <dhinds@allegro.stanford.edu>
+ *		Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
+ *		Adam Sulmicki <adam@cfar.umd.edu>
+ *              Pekka Riikonen <priikone@poesidon.pspt.fi>
+ *
+ *	Changes:
+ *              D.J. Barrow     :       Fixed bug where dev->refcnt gets set
+ *              			to 2 if register_netdev gets called
+ *              			before net_dev_init & also removed a
+ *              			few lines of code in the process.
+ *		Alan Cox	:	device private ioctl copies fields back.
+ *		Alan Cox	:	Transmit queue code does relevant
+ *					stunts to keep the queue safe.
+ *		Alan Cox	:	Fixed double lock.
+ *		Alan Cox	:	Fixed promisc NULL pointer trap
+ *		????????	:	Support the full private ioctl range
+ *		Alan Cox	:	Moved ioctl permission check into
+ *					drivers
+ *		Tim Kordas	:	SIOCADDMULTI/SIOCDELMULTI
+ *		Alan Cox	:	100 backlog just doesn't cut it when
+ *					you start doing multicast video 8)
+ *		Alan Cox	:	Rewrote net_bh and list manager.
+ *		Alan Cox	: 	Fix ETH_P_ALL echoback lengths.
+ *		Alan Cox	:	Took out transmit every packet pass
+ *					Saved a few bytes in the ioctl handler
+ *		Alan Cox	:	Network driver sets packet type before
+ *					calling netif_rx. Saves a function
+ *					call a packet.
+ *		Alan Cox	:	Hashed net_bh()
+ *		Richard Kooijman:	Timestamp fixes.
+ *		Alan Cox	:	Wrong field in SIOCGIFDSTADDR
+ *		Alan Cox	:	Device lock protection.
+ *		Alan Cox	: 	Fixed nasty side effect of device close
+ *					changes.
+ *		Rudi Cilibrasi	:	Pass the right thing to
+ *					set_mac_address()
+ *		Dave Miller	:	32bit quantity for the device lock to
+ *					make it work out on a Sparc.
+ *		Bjorn Ekwall	:	Added KERNELD hack.
+ *		Alan Cox	:	Cleaned up the backlog initialise.
+ *		Craig Metz	:	SIOCGIFCONF fix if space for under
+ *					1 device.
+ *	    Thomas Bogendoerfer :	Return ENODEV for dev_open, if there
+ *					is no device open function.
+ *		Andi Kleen	:	Fix error reporting for SIOCGIFCONF
+ *	    Michael Chastain	:	Fix signed/unsigned for SIOCGIFCONF
+ *		Cyrus Durgin	:	Cleaned for KMOD
+ *		Adam Sulmicki   :	Bug Fix : Network Device Unload
+ *					A network device unload needs to purge
+ *					the backlog queue.
+ *	Paul Rusty Russell	:	SIOCSIFNAME
+ *              Pekka Riikonen  :	Netdev boot-time settings code
+ *              Andrew Morton   :       Make unregister_netdevice wait
+ *              			indefinitely on dev->refcnt
+ * 		J Hadi Salim	:	- Backlog queue sampling
+ *				        - netif_rx() feedback
+ */
+
+#include <asm/uaccess.h>
+#include <asm/system.h>
+#include <asm/bitops.h>
+#include <linux/config.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/socket.h>
+#include <linux/sockios.h>
+#include <linux/errno.h>
+#include <linux/interrupt.h>
+#include <linux/if_ether.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/notifier.h>
+#include <linux/skbuff.h>
+#include <linux/brlock.h>
+#include <net/sock.h>
+#include <linux/rtnetlink.h>
+#include <linux/proc_fs.h>
+#include <linux/stat.h>
+#include <linux/if_bridge.h>
+#include <linux/divert.h>
+#include <net/dst.h>
+#include <net/pkt_sched.h>
+#include <net/profile.h>
+#include <net/checksum.h>
+#include <linux/highmem.h>
+#include <linux/init.h>
+#include <linux/kmod.h>
+#include <linux/module.h>
+#if defined(CONFIG_NET_RADIO) || defined(CONFIG_NET_PCMCIA_RADIO)
+#include <linux/wireless.h>		/* Note : will define WIRELESS_EXT */
+#include <net/iw_handler.h>
+#endif	/* CONFIG_NET_RADIO || CONFIG_NET_PCMCIA_RADIO */
+#ifdef CONFIG_PLIP
+extern int plip_init(void);
+#endif
+
+
+/* This define, if set, will randomly drop a packet when congestion
+ * is more than moderate.  It helps fairness in the multi-interface
+ * case when one of them is a hog, but it kills performance for the
+ * single interface case so it is off now by default.
+ */
+#undef RAND_LIE
+
+/* Setting this will sample the queue lengths and thus congestion
+ * via a timer instead of as each packet is received.
+ */
+#undef OFFLINE_SAMPLE
+
+NET_PROFILE_DEFINE(dev_queue_xmit)
+NET_PROFILE_DEFINE(softnet_process)
+
+const char *if_port_text[] = {
+  "unknown",
+  "BNC",
+  "10baseT",
+  "AUI",
+  "100baseT",
+  "100baseTX",
+  "100baseFX"
+};
+
+/*
+ *	The list of packet types we will receive (as opposed to discard)
+ *	and the routines to invoke.
+ *
+ *	Why 16. Because with 16 the only overlap we get on a hash of the
+ *	low nibble of the protocol value is RARP/SNAP/X.25.
+ *
+ *      NOTE:  That is no longer true with the addition of VLAN tags.  Not
+ *             sure which should go first, but I bet it won't make much
+ *             difference if we are running VLANs.  The good news is that
+ *             this protocol won't be in the list unless compiled in, so
+ *             the average user (w/out VLANs) will not be adversly affected.
+ *             --BLG
+ *
+ *		0800	IP
+ *		8100    802.1Q VLAN
+ *		0001	802.3
+ *		0002	AX.25
+ *		0004	802.2
+ *		8035	RARP
+ *		0005	SNAP
+ *		0805	X.25
+ *		0806	ARP
+ *		8137	IPX
+ *		0009	Localtalk
+ *		86DD	IPv6
+ */
+
+static struct packet_type *ptype_base[16];	/* 16 way hashed list */
+static struct packet_type *ptype_all;		/* Taps */
+
+#ifdef OFFLINE_SAMPLE
+static void sample_queue(unsigned long dummy);
+static struct timer_list samp_timer = { function: sample_queue };
+#endif
+
+#ifdef CONFIG_HOTPLUG
+static int net_run_sbin_hotplug(struct net_device *dev, char *action);
+#else
+#define net_run_sbin_hotplug(dev, action) ({ 0; })
+#endif
+
+/*
+ *	Our notifier list
+ */
+
+static struct notifier_block *netdev_chain;
+
+/*
+ *	Device drivers call our routines to queue packets here. We empty the
+ *	queue in the local softnet handler.
+ */
+struct softnet_data softnet_data[NR_CPUS] __cacheline_aligned;
+
+#ifdef CONFIG_NET_FASTROUTE
+int netdev_fastroute;
+int netdev_fastroute_obstacles;
+#endif
+
+
+/*******************************************************************************
+
+		Protocol management and registration routines
+
+*******************************************************************************/
+
+/*
+ *	For efficiency
+ */
+
+int netdev_nit;
+
+/*
+ *	Add a protocol ID to the list. Now that the input handler is
+ *	smarter we can dispense with all the messy stuff that used to be
+ *	here.
+ *
+ *	BEWARE!!! Protocol handlers, mangling input packets,
+ *	MUST BE last in hash buckets and checking protocol handlers
+ *	MUST start from promiscous ptype_all chain in net_bh.
+ *	It is true now, do not change it.
+ *	Explantion follows: if protocol handler, mangling packet, will
+ *	be the first on list, it is not able to sense, that packet
+ *	is cloned and should be copied-on-write, so that it will
+ *	change it and subsequent readers will get broken packet.
+ *							--ANK (980803)
+ */
+
+/**
+ *	dev_add_pack - add packet handler
+ *	@pt: packet type declaration
+ *
+ *	Add a protocol handler to the networking stack. The passed &packet_type
+ *	is linked into kernel lists and may not be freed until it has been
+ *	removed from the kernel lists.
+ */
+
+void dev_add_pack(struct packet_type *pt)
+{
+	int hash;
+
+	br_write_lock_bh(BR_NETPROTO_LOCK);
+
+#ifdef CONFIG_NET_FASTROUTE
+	/* Hack to detect packet socket */
+	if (pt->data && (long)(pt->data) != 1) {
+		netdev_fastroute_obstacles++;
+		dev_clear_fastroute(pt->dev);
+	}
+#endif
+	if (pt->type == htons(ETH_P_ALL)) {
+		netdev_nit++;
+		pt->next  = ptype_all;
+		ptype_all = pt;
+	} else {
+		hash = ntohs(pt->type) & 15;
+		pt->next = ptype_base[hash];
+		ptype_base[hash] = pt;
+	}
+	br_write_unlock_bh(BR_NETPROTO_LOCK);
+}
+
+
+/**
+ *	dev_remove_pack	 - remove packet handler
+ *	@pt: packet type declaration
+ *
+ *	Remove a protocol handler that was previously added to the kernel
+ *	protocol handlers by dev_add_pack(). The passed &packet_type is removed
+ *	from the kernel lists and can be freed or reused once this function
+ *	returns.
+ */
+void dev_remove_pack(struct packet_type *pt)
+{
+	struct packet_type **pt1;
+
+	br_write_lock_bh(BR_NETPROTO_LOCK);
+
+	if (pt->type == htons(ETH_P_ALL)) {
+		netdev_nit--;
+		pt1 = &ptype_all;
+	} else
+		pt1 = &ptype_base[ntohs(pt->type) & 15];
+
+	for (; *pt1; pt1 = &((*pt1)->next)) {
+		if (pt == *pt1) {
+			*pt1 = pt->next;
+#ifdef CONFIG_NET_FASTROUTE
+			if (pt->data)
+				netdev_fastroute_obstacles--;
+#endif
+			goto out;
+		}
+	}
+	printk(KERN_WARNING "dev_remove_pack: %p not found.\n", pt);
+out:
+	br_write_unlock_bh(BR_NETPROTO_LOCK);
+}
+
+/******************************************************************************
+
+		      Device Boot-time Settings Routines
+
+*******************************************************************************/
+
+/* Boot time configuration table */
+static struct netdev_boot_setup dev_boot_setup[NETDEV_BOOT_SETUP_MAX];
+
+/**
+ *	netdev_boot_setup_add	- add new setup entry
+ *	@name: name of the device
+ *	@map: configured settings for the device
+ *
+ *	Adds new setup entry to the dev_boot_setup list.  The function
+ *	returns 0 on error and 1 on success.  This is a generic routine to
+ *	all netdevices.
+ */
+int netdev_boot_setup_add(char *name, struct ifmap *map)
+{
+	struct netdev_boot_setup *s;
+	int i;
+
+	s = dev_boot_setup;
+	for (i = 0; i < NETDEV_BOOT_SETUP_MAX; i++) {
+		if (s[i].name[0] == '\0' || s[i].name[0] == ' ') {
+			memset(s[i].name, 0, sizeof(s[i].name));
+			strcpy(s[i].name, name);
+			memcpy(&s[i].map, map, sizeof(s[i].map));
+			break;
+		}
+	}
+
+	return i >= NETDEV_BOOT_SETUP_MAX ? 0 : 1;
+}
+
+/**
+ *	netdev_boot_setup_check	- check boot time settings
+ *	@dev: the netdevice
+ *
+ * 	Check boot time settings for the device.
+ *	The found settings are set for the device to be used
+ *	later in the device probing.
+ *	Returns 0 if no settings found, 1 if they are.
+ */
+int netdev_boot_setup_check(struct net_device *dev)
+{
+	struct netdev_boot_setup *s = dev_boot_setup;
+	int i;
+
+	for (i = 0; i < NETDEV_BOOT_SETUP_MAX; i++) {
+		if (s[i].name[0] != '\0' && s[i].name[0] != ' ' &&
+		    !strncmp(dev->name, s[i].name, strlen(s[i].name))) {
+			dev->irq 	= s[i].map.irq;
+			dev->base_addr 	= s[i].map.base_addr;
+			dev->mem_start 	= s[i].map.mem_start;
+			dev->mem_end 	= s[i].map.mem_end;
+			return 1;
+		}
+	}
+	return 0;
+}
+
+/*
+ * Saves at boot time configured settings for any netdevice.
+ */
+int __init netdev_boot_setup(char *str)
+{
+	int ints[5];
+	struct ifmap map;
+
+	str = get_options(str, ARRAY_SIZE(ints), ints);
+	if (!str || !*str)
+		return 0;
+
+	/* Save settings */
+	memset(&map, 0, sizeof(map));
+	if (ints[0] > 0)
+		map.irq = ints[1];
+	if (ints[0] > 1)
+		map.base_addr = ints[2];
+	if (ints[0] > 2)
+		map.mem_start = ints[3];
+	if (ints[0] > 3)
+		map.mem_end = ints[4];
+
+	/* Add new entry to the list */
+	return netdev_boot_setup_add(str, &map);
+}
+
+__setup("netdev=", netdev_boot_setup);
+
+/*******************************************************************************
+
+			    Device Interface Subroutines
+
+*******************************************************************************/
+
+/**
+ *	__dev_get_by_name	- find a device by its name
+ *	@name: name to find
+ *
+ *	Find an interface by name. Must be called under RTNL semaphore
+ *	or @dev_base_lock. If the name is found a pointer to the device
+ *	is returned. If the name is not found then %NULL is returned. The
+ *	reference counters are not incremented so the caller must be
+ *	careful with locks.
+ */
+
+struct net_device *__dev_get_by_name(const char *name)
+{
+	struct net_device *dev;
+
+	for (dev = dev_base; dev; dev = dev->next)
+		if (!strncmp(dev->name, name, IFNAMSIZ))
+			break;
+	return dev;
+}
+
+/**
+ *	dev_get_by_name		- find a device by its name
+ *	@name: name to find
+ *
+ *	Find an interface by name. This can be called from any
+ *	context and does its own locking. The returned handle has
+ *	the usage count incremented and the caller must use dev_put() to
+ *	release it when it is no longer needed. %NULL is returned if no
+ *	matching device is found.
+ */
+
+struct net_device *dev_get_by_name(const char *name)
+{
+	struct net_device *dev;
+
+	read_lock(&dev_base_lock);
+	dev = __dev_get_by_name(name);
+	if (dev)
+		dev_hold(dev);
+	read_unlock(&dev_base_lock);
+	return dev;
+}
+
+/*
+   Return value is changed to int to prevent illegal usage in future.
+   It is still legal to use to check for device existence.
+
+   User should understand, that the result returned by this function
+   is meaningless, if it was not issued under rtnl semaphore.
+ */
+
+/**
+ *	dev_get	-	test if a device exists
+ *	@name:	name to test for
+ *
+ *	Test if a name exists. Returns true if the name is found. In order
+ *	to be sure the name is not allocated or removed during the test the
+ *	caller must hold the rtnl semaphore.
+ *
+ *	This function primarily exists for back compatibility with older
+ *	drivers.
+ */
+int dev_get(const char *name)
+{
+	struct net_device *dev;
+
+	read_lock(&dev_base_lock);
+	dev = __dev_get_by_name(name);
+	read_unlock(&dev_base_lock);
+	return dev != NULL;
+}
+
+/**
+ *	__dev_get_by_index - find a device by its ifindex
+ *	@ifindex: index of device
+ *
+ *	Search for an interface by index. Returns %NULL if the device
+ *	is not found or a pointer to the device. The device has not
+ *	had its reference counter increased so the caller must be careful
+ *	about locking. The caller must hold either the RTNL semaphore
+ *	or @dev_base_lock.
+ */
+
+struct net_device *__dev_get_by_index(int ifindex)
+{
+	struct net_device *dev;
+
+	for (dev = dev_base; dev; dev = dev->next)
+		if (dev->ifindex == ifindex)
+			break;
+	return dev;
+}
+
+
+/**
+ *	dev_get_by_index - find a device by its ifindex
+ *	@ifindex: index of device
+ *
+ *	Search for an interface by index. Returns NULL if the device
+ *	is not found or a pointer to the device. The device returned has
+ *	had a reference added and the pointer is safe until the user calls
+ *	dev_put to indicate they have finished with it.
+ */
+
+struct net_device *dev_get_by_index(int ifindex)
+{
+	struct net_device *dev;
+
+	read_lock(&dev_base_lock);
+	dev = __dev_get_by_index(ifindex);
+	if (dev)
+		dev_hold(dev);
+	read_unlock(&dev_base_lock);
+	return dev;
+}
+
+/**
+ *	dev_getbyhwaddr - find a device by its hardware address
+ *	@type: media type of device
+ *	@ha: hardware address
+ *
+ *	Search for an interface by MAC address. Returns NULL if the device
+ *	is not found or a pointer to the device. The caller must hold the
+ *	rtnl semaphore. The returned device has not had its ref count increased
+ *	and the caller must therefore be careful about locking
+ *
+ *	BUGS:
+ *	If the API was consistent this would be __dev_get_by_hwaddr
+ */
+
+struct net_device *dev_getbyhwaddr(unsigned short type, char *ha)
+{
+	struct net_device *dev;
+
+	ASSERT_RTNL();
+
+	for (dev = dev_base; dev; dev = dev->next)
+		if (dev->type == type &&
+		    !memcmp(dev->dev_addr, ha, dev->addr_len))
+			break;
+	return dev;
+}
+
+/**
+ *	dev_alloc_name - allocate a name for a device
+ *	@dev: device
+ *	@name: name format string
+ *
+ *	Passed a format string - eg "lt%d" it will try and find a suitable
+ *	id. Not efficient for many devices, not called a lot. The caller
+ *	must hold the dev_base or rtnl lock while allocating the name and
+ *	adding the device in order to avoid duplicates. Returns the number
+ *	of the unit assigned or a negative errno code.
+ */
+
+int dev_alloc_name(struct net_device *dev, const char *name)
+{
+	int i;
+	char buf[32];
+	char *p;
+
+	/*
+	 * Verify the string as this thing may have come from
+	 * the user.  There must be either one "%d" and no other "%"
+	 * characters, or no "%" characters at all.
+	 */
+	p = strchr(name, '%');
+	if (p && (p[1] != 'd' || strchr(p + 2, '%')))
+		return -EINVAL;
+
+	/*
+	 * If you need over 100 please also fix the algorithm...
+	 */
+	for (i = 0; i < 100; i++) {
+		snprintf(buf, sizeof(buf), name, i);
+		if (!__dev_get_by_name(buf)) {
+			strcpy(dev->name, buf);
+			return i;
+		}
+	}
+	return -ENFILE;	/* Over 100 of the things .. bail out! */
+}
+
+/**
+ *	dev_alloc - allocate a network device and name
+ *	@name: name format string
+ *	@err: error return pointer
+ *
+ *	Passed a format string, eg. "lt%d", it will allocate a network device
+ *	and space for the name. %NULL is returned if no memory is available.
+ *	If the allocation succeeds then the name is assigned and the
+ *	device pointer returned. %NULL is returned if the name allocation
+ *	failed. The cause of an error is returned as a negative errno code
+ *	in the variable @err points to.
+ *
+ *	The caller must hold the @dev_base or RTNL locks when doing this in
+ *	order to avoid duplicate name allocations.
+ */
+
+struct net_device *dev_alloc(const char *name, int *err)
+{
+	struct net_device *dev = kmalloc(sizeof(*dev), GFP_KERNEL);
+
+	if (!dev)
+		*err = -ENOBUFS;
+	else {
+		memset(dev, 0, sizeof(*dev));
+		*err = dev_alloc_name(dev, name);
+		if (*err < 0) {
+			kfree(dev);
+			dev = NULL;
+		}
+	}
+	return dev;
+}
+
+/**
+ *	netdev_state_change - device changes state
+ *	@dev: device to cause notification
+ *
+ *	Called to indicate a device has changed state. This function calls
+ *	the notifier chains for netdev_chain and sends a NEWLINK message
+ *	to the routing socket.
+ */
+void netdev_state_change(struct net_device *dev)
+{
+	if (dev->flags & IFF_UP) {
+		notifier_call_chain(&netdev_chain, NETDEV_CHANGE, dev);
+		rtmsg_ifinfo(RTM_NEWLINK, dev, 0);
+	}
+}
+
+
+#ifdef CONFIG_KMOD
+
+/**
+ *	dev_load 	- load a network module
+ *	@name: name of interface
+ *
+ *	If a network interface is not present and the process has suitable
+ *	privileges this function loads the module. If module loading is not
+ *	available in this kernel then it becomes a nop.
+ */
+
+void dev_load(const char *name)
+{
+	if (!dev_get(name) && capable(CAP_SYS_MODULE))
+		request_module(name);
+}
+
+#else
+
+extern inline void dev_load(const char *unused){;}
+
+#endif
+
+static int default_rebuild_header(struct sk_buff *skb)
+{
+	printk(KERN_DEBUG "%s: default_rebuild_header called -- BUG!\n",
+	       skb->dev ? skb->dev->name : "NULL!!!");
+	kfree_skb(skb);
+	return 1;
+}
+
+/**
+ *	dev_open	- prepare an interface for use.
+ *	@dev:	device to open
+ *
+ *	Takes a device from down to up state. The device's private open
+ *	function is invoked and then the multicast lists are loaded. Finally
+ *	the device is moved into the up state and a %NETDEV_UP message is
+ *	sent to the netdev notifier chain.
+ *
+ *	Calling this function on an active interface is a nop. On a failure
+ *	a negative errno code is returned.
+ */
+int dev_open(struct net_device *dev)
+{
+	int ret = 0;
+
+	/*
+	 *	Is it already up?
+	 */
+
+	if (dev->flags & IFF_UP)
+		return 0;
+
+	/*
+	 *	Is it even present?
+	 */
+	if (!netif_device_present(dev))
+		return -ENODEV;
+
+	/*
+	 *	Call device private open method
+	 */
+	if (try_inc_mod_count(dev->owner)) {
+		if (dev->open) {
+			ret = dev->open(dev);
+			if (ret && dev->owner)
+				__MOD_DEC_USE_COUNT(dev->owner);
+		}
+	} else {
+		ret = -ENODEV;
+	}
+
+	/*
+	 *	If it went open OK then:
+	 */
+
+	if (!ret) {
+		/*
+		 *	Set the flags.
+		 */
+		dev->flags |= IFF_UP;
+
+		set_bit(__LINK_STATE_START, &dev->state);
+
+		/*
+		 *	Initialize multicasting status
+		 */
+		dev_mc_upload(dev);
+
+		/*
+		 *	Wakeup transmit queue engine
+		 */
+		dev_activate(dev);
+
+		/*
+		 *	... and announce new interface.
+		 */
+		notifier_call_chain(&netdev_chain, NETDEV_UP, dev);
+	}
+	return ret;
+}
+
+#ifdef CONFIG_NET_FASTROUTE
+
+static void dev_do_clear_fastroute(struct net_device *dev)
+{
+	if (dev->accept_fastpath) {
+		int i;
+
+		for (i = 0; i <= NETDEV_FASTROUTE_HMASK; i++) {
+			struct dst_entry *dst;
+
+			write_lock_irq(&dev->fastpath_lock);
+			dst = dev->fastpath[i];
+			dev->fastpath[i] = NULL;
+			write_unlock_irq(&dev->fastpath_lock);
+
+			dst_release(dst);
+		}
+	}
+}
+
+void dev_clear_fastroute(struct net_device *dev)
+{
+	if (dev) {
+		dev_do_clear_fastroute(dev);
+	} else {
+		read_lock(&dev_base_lock);
+		for (dev = dev_base; dev; dev = dev->next)
+			dev_do_clear_fastroute(dev);
+		read_unlock(&dev_base_lock);
+	}
+}
+#endif
+
+/**
+ *	dev_close - shutdown an interface.
+ *	@dev: device to shutdown
+ *
+ *	This function moves an active device into down state. A
+ *	%NETDEV_GOING_DOWN is sent to the netdev notifier chain. The device
+ *	is then deactivated and finally a %NETDEV_DOWN is sent to the notifier
+ *	chain.
+ */
+int dev_close(struct net_device *dev)
+{
+	if (!(dev->flags & IFF_UP))
+		return 0;
+
+	/*
+	 *	Tell people we are going down, so that they can
+	 *	prepare to death, when device is still operating.
+	 */
+	notifier_call_chain(&netdev_chain, NETDEV_GOING_DOWN, dev);
+
+	dev_deactivate(dev);
+
+	clear_bit(__LINK_STATE_START, &dev->state);
+
+	/* Synchronize to scheduled poll. We cannot touch poll list,
+	 * it can be even on different cpu. So just clear netif_running(),
+	 * and wait when poll really will happen. Actually, the best place
+	 * for this is inside dev->stop() after device stopped its irq
+	 * engine, but this requires more changes in devices. */
+
+	smp_mb__after_clear_bit(); /* Commit netif_running(). */
+	while (test_bit(__LINK_STATE_RX_SCHED, &dev->state)) {
+		/* No hurry. */
+		current->state = TASK_INTERRUPTIBLE;
+		schedule_timeout(1);
+	}
+
+	/*
+	 *	Call the device specific close. This cannot fail.
+	 *	Only if device is UP
+	 *
+	 *	We allow it to be called even after a DETACH hot-plug
+	 *	event.
+	 */
+	if (dev->stop)
+		dev->stop(dev);
+
+	/*
+	 *	Device is now down.
+	 */
+
+	dev->flags &= ~IFF_UP;
+#ifdef CONFIG_NET_FASTROUTE
+	dev_clear_fastroute(dev);
+#endif
+
+	/*
+	 *	Tell people we are down
+	 */
+	notifier_call_chain(&netdev_chain, NETDEV_DOWN, dev);
+
+	/*
+	 * Drop the module refcount
+	 */
+	if (dev->owner)
+		__MOD_DEC_USE_COUNT(dev->owner);
+
+	return 0;
+}
+
+
+/*
+ *	Device change register/unregister. These are not inline or static
+ *	as we export them to the world.
+ */
+
+/**
+ *	register_netdevice_notifier - register a network notifier block
+ *	@nb: notifier
+ *
+ *	Register a notifier to be called when network device events occur.
+ *	The notifier passed is linked into the kernel structures and must
+ *	not be reused until it has been unregistered. A negative errno code
+ *	is returned on a failure.
+ */
+
+int register_netdevice_notifier(struct notifier_block *nb)
+{
+	return notifier_chain_register(&netdev_chain, nb);
+}
+
+/**
+ *	unregister_netdevice_notifier - unregister a network notifier block
+ *	@nb: notifier
+ *
+ *	Unregister a notifier previously registered by
+ *	register_netdevice_notifier(). The notifier is unlinked into the
+ *	kernel structures and may then be reused. A negative errno code
+ *	is returned on a failure.
+ */
+
+int unregister_netdevice_notifier(struct notifier_block *nb)
+{
+	return notifier_chain_unregister(&netdev_chain, nb);
+}
+
+/*
+ *	Support routine. Sends outgoing frames to any network
+ *	taps currently in use.
+ */
+
+void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev)
+{
+	struct packet_type *ptype;
+	do_gettimeofday(&skb->stamp);
+
+	br_read_lock(BR_NETPROTO_LOCK);
+	for (ptype = ptype_all; ptype; ptype = ptype->next) {
+		/* Never send packets back to the socket
+		 * they originated from - MvS (miquels@drinkel.ow.org)
+		 */
+		if ((ptype->dev == dev || !ptype->dev) &&
+		    (struct sock *)ptype->data != skb->sk) {
+			struct sk_buff *skb2= skb_clone(skb, GFP_ATOMIC);
+			if (!skb2)
+				break;
+
+			/* skb->nh should be correctly
+			   set by sender, so that the second statement is
+			   just protection against buggy protocols.
+			 */
+			skb2->mac.raw = skb2->data;
+
+			if (skb2->nh.raw < skb2->data ||
+			    skb2->nh.raw > skb2->tail) {
+				if (net_ratelimit())
+					printk(KERN_DEBUG "protocol %04x is "
+							  "buggy, dev %s\n",
+					       skb2->protocol, dev->name);
+				skb2->nh.raw = skb2->data;
+			}
+
+			skb2->h.raw = skb2->nh.raw;
+			skb2->pkt_type = PACKET_OUTGOING;
+			ptype->func(skb2, skb->dev, ptype);
+		}
+	}
+	br_read_unlock(BR_NETPROTO_LOCK);
+}
+
+/* Calculate csum in the case, when packet is misrouted.
+ * If it failed by some reason, ignore and send skb with wrong
+ * checksum.
+ */
+struct sk_buff *skb_checksum_help(struct sk_buff *skb)
+{
+	unsigned int csum;
+	int offset = skb->h.raw - skb->data;
+
+	if (offset > (int)skb->len)
+		BUG();
+	csum = skb_checksum(skb, offset, skb->len-offset, 0);
+
+	offset = skb->tail - skb->h.raw;
+	if (offset <= 0)
+		BUG();
+	if (skb->csum + 2 > offset)
+		BUG();
+
+	*(u16*)(skb->h.raw + skb->csum) = csum_fold(csum);
+	skb->ip_summed = CHECKSUM_NONE;
+	return skb;
+}
+
+#ifdef CONFIG_HIGHMEM
+/* Actually, we should eliminate this check as soon as we know, that:
+ * 1. IOMMU is present and allows to map all the memory.
+ * 2. No high memory really exists on this machine.
+ */
+
+static inline int illegal_highdma(struct net_device *dev, struct sk_buff *skb)
+{
+	int i;
+
+	if (dev->features & NETIF_F_HIGHDMA)
+		return 0;
+
+	for (i = 0; i < skb_shinfo(skb)->nr_frags; i++)
+		if (skb_shinfo(skb)->frags[i].page >= highmem_start_page)
+			return 1;
+
+	return 0;
+}
+#else
+#define illegal_highdma(dev, skb)	(0)
+#endif
+
+/**
+ *	dev_queue_xmit - transmit a buffer
+ *	@skb: buffer to transmit
+ *
+ *	Queue a buffer for transmission to a network device. The caller must
+ *	have set the device and priority and built the buffer before calling
+ *	this function. The function can be called from an interrupt.
+ *
+ *	A negative errno code is returned on a failure. A success does not
+ *	guarantee the frame will be transmitted as it may be dropped due
+ *	to congestion or traffic shaping.
+ */
+
+int dev_queue_xmit(struct sk_buff *skb)
+{
+	struct net_device *dev = skb->dev;
+	struct Qdisc *q;
+	int rc = -ENOMEM;
+
+	if (skb_shinfo(skb)->frag_list &&
+	    !(dev->features & NETIF_F_FRAGLIST) &&
+	    skb_linearize(skb, GFP_ATOMIC))
+		goto out_kfree_skb;
+
+	/* Fragmented skb is linearized if device does not support SG,
+	 * or if at least one of fragments is in highmem and device
+	 * does not support DMA from it.
+	 */
+	if (skb_shinfo(skb)->nr_frags &&
+	    (!(dev->features & NETIF_F_SG) || illegal_highdma(dev, skb)) &&
+	    skb_linearize(skb, GFP_ATOMIC))
+		goto out_kfree_skb;
+
+	/* If packet is not checksummed and device does not support
+	 * checksumming for this protocol, complete checksumming here.
+	 */
+	if (skb->ip_summed == CHECKSUM_HW &&
+	    (!(dev->features & (NETIF_F_HW_CSUM | NETIF_F_NO_CSUM)) &&
+	     (!(dev->features & NETIF_F_IP_CSUM) ||
+	      skb->protocol != htons(ETH_P_IP)))) {
+		if ((skb = skb_checksum_help(skb)) == NULL)
+			goto out;
+	}
+
+	/* Grab device queue */
+	spin_lock_bh(&dev->queue_lock);
+	q = dev->qdisc;
+	if (q->enqueue) {
+		rc = q->enqueue(skb, q);
+
+		qdisc_run(dev);
+
+		spin_unlock_bh(&dev->queue_lock);
+		rc = rc == NET_XMIT_BYPASS ? NET_XMIT_SUCCESS : rc;
+		goto out;
+	}
+
+	/* The device has no queue. Common case for software devices:
+	   loopback, all the sorts of tunnels...
+
+	   Really, it is unlikely that xmit_lock protection is necessary here.
+	   (f.e. loopback and IP tunnels are clean ignoring statistics
+	   counters.)
+	   However, it is possible, that they rely on protection
+	   made by us here.
+
+	   Check this and shot the lock. It is not prone from deadlocks.
+	   Either shot noqueue qdisc, it is even simpler 8)
+	 */
+	if (dev->flags & IFF_UP) {
+		int cpu = smp_processor_id();
+
+		if (dev->xmit_lock_owner != cpu) {
+			/*
+			 * The spin_lock effectivly does a preempt lock, but 
+			 * we are about to drop that...
+			 */
+			preempt_disable();
+			spin_unlock(&dev->queue_lock);
+			spin_lock(&dev->xmit_lock);
+			dev->xmit_lock_owner = cpu;
+			preempt_enable();
+
+			if (!netif_queue_stopped(dev)) {
+				if (netdev_nit)
+					dev_queue_xmit_nit(skb, dev);
+
+				rc = 0;
+				if (!dev->hard_start_xmit(skb, dev)) {
+					dev->xmit_lock_owner = -1;
+					spin_unlock_bh(&dev->xmit_lock);
+					goto out;
+				}
+			}
+			dev->xmit_lock_owner = -1;
+			spin_unlock_bh(&dev->xmit_lock);
+			if (net_ratelimit())
+				printk(KERN_DEBUG "Virtual device %s asks to "
+				       "queue packet!\n", dev->name);
+			goto out_enetdown;
+		} else {
+			/* Recursion is detected! It is possible,
+			 * unfortunately */
+			if (net_ratelimit())
+				printk(KERN_DEBUG "Dead loop on virtual device "
+				       "%s, fix it urgently!\n", dev->name);
+		}
+	}
+	spin_unlock_bh(&dev->queue_lock);
+out_enetdown:
+	rc = -ENETDOWN;
+out_kfree_skb:
+	kfree_skb(skb);
+out:
+	return rc;
+}
+
+
+/*=======================================================================
+			Receiver routines
+  =======================================================================*/
+
+int netdev_max_backlog = 300;
+int weight_p = 64;            /* old backlog weight */
+/* These numbers are selected based on intuition and some
+ * experimentatiom, if you have more scientific way of doing this
+ * please go ahead and fix things.
+ */
+int no_cong_thresh = 10;
+int no_cong = 20;
+int lo_cong = 100;
+int mod_cong = 290;
+
+struct netif_rx_stats netdev_rx_stat[NR_CPUS];
+
+
+#ifdef CONFIG_NET_HW_FLOWCONTROL
+atomic_t netdev_dropping = ATOMIC_INIT(0);
+static unsigned long netdev_fc_mask = 1;
+unsigned long netdev_fc_xoff;
+spinlock_t netdev_fc_lock = SPIN_LOCK_UNLOCKED;
+
+static struct
+{
+	void (*stimul)(struct net_device *);
+	struct net_device *dev;
+} netdev_fc_slots[BITS_PER_LONG];
+
+int netdev_register_fc(struct net_device *dev,
+		       void (*stimul)(struct net_device *dev))
+{
+	int bit = 0;
+	unsigned long flags;
+
+	spin_lock_irqsave(&netdev_fc_lock, flags);
+	if (netdev_fc_mask != ~0UL) {
+		bit = ffz(netdev_fc_mask);
+		netdev_fc_slots[bit].stimul = stimul;
+		netdev_fc_slots[bit].dev = dev;
+		set_bit(bit, &netdev_fc_mask);
+		clear_bit(bit, &netdev_fc_xoff);
+	}
+	spin_unlock_irqrestore(&netdev_fc_lock, flags);
+	return bit;
+}
+
+void netdev_unregister_fc(int bit)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&netdev_fc_lock, flags);
+	if (bit > 0) {
+		netdev_fc_slots[bit].stimul = NULL;
+		netdev_fc_slots[bit].dev = NULL;
+		clear_bit(bit, &netdev_fc_mask);
+		clear_bit(bit, &netdev_fc_xoff);
+	}
+	spin_unlock_irqrestore(&netdev_fc_lock, flags);
+}
+
+static void netdev_wakeup(void)
+{
+	unsigned long xoff;
+
+	spin_lock(&netdev_fc_lock);
+	xoff = netdev_fc_xoff;
+	netdev_fc_xoff = 0;
+	while (xoff) {
+		int i = ffz(~xoff);
+		xoff &= ~(1 << i);
+		netdev_fc_slots[i].stimul(netdev_fc_slots[i].dev);
+	}
+	spin_unlock(&netdev_fc_lock);
+}
+#endif
+
+static void get_sample_stats(int cpu)
+{
+#ifdef RAND_LIE
+	unsigned long rd;
+	int rq;
+#endif
+	int blog = softnet_data[cpu].input_pkt_queue.qlen;
+	int avg_blog = softnet_data[cpu].avg_blog;
+
+	avg_blog = (avg_blog >> 1) + (blog >> 1);
+
+	if (avg_blog > mod_cong) {
+		/* Above moderate congestion levels. */
+		softnet_data[cpu].cng_level = NET_RX_CN_HIGH;
+#ifdef RAND_LIE
+		rd = net_random();
+		rq = rd % netdev_max_backlog;
+		if (rq < avg_blog) /* unlucky bastard */
+			softnet_data[cpu].cng_level = NET_RX_DROP;
+#endif
+	} else if (avg_blog > lo_cong) {
+		softnet_data[cpu].cng_level = NET_RX_CN_MOD;
+#ifdef RAND_LIE
+		rd = net_random();
+		rq = rd % netdev_max_backlog;
+			if (rq < avg_blog) /* unlucky bastard */
+				softnet_data[cpu].cng_level = NET_RX_CN_HIGH;
+#endif
+	} else if (avg_blog > no_cong)
+		softnet_data[cpu].cng_level = NET_RX_CN_LOW;
+	else  /* no congestion */
+		softnet_data[cpu].cng_level = NET_RX_SUCCESS;
+
+	softnet_data[cpu].avg_blog = avg_blog;
+}
+
+#ifdef OFFLINE_SAMPLE
+static void sample_queue(unsigned long dummy)
+{
+/* 10 ms 0r 1ms -- i dont care -- JHS */
+	int next_tick = 1;
+	int cpu = smp_processor_id();
+
+	get_sample_stats(cpu);
+	next_tick += jiffies;
+	mod_timer(&samp_timer, next_tick);
+}
+#endif
+
+
+/**
+ *	netif_rx	-	post buffer to the network code
+ *	@skb: buffer to post
+ *
+ *	This function receives a packet from a device driver and queues it for
+ *	the upper (protocol) levels to process.  It always succeeds. The buffer
+ *	may be dropped during processing for congestion control or by the
+ *	protocol layers.
+ *
+ *	return values:
+ *	NET_RX_SUCCESS	(no congestion)
+ *	NET_RX_CN_LOW   (low congestion)
+ *	NET_RX_CN_MOD   (moderate congestion)
+ *	NET_RX_CN_HIGH  (high congestion)
+ *	NET_RX_DROP     (packet was dropped)
+ *
+ */
+
+int netif_rx(struct sk_buff *skb)
+{
+	int this_cpu = smp_processor_id();
+	struct softnet_data *queue;
+	unsigned long flags;
+
+	if (!skb->stamp.tv_sec)
+		do_gettimeofday(&skb->stamp);
+
+	/* The code is rearranged so that the path is the most
+	   short when CPU is congested, but is still operating.
+	 */
+	queue = &softnet_data[this_cpu];
+
+	local_irq_save(flags);
+
+	netdev_rx_stat[this_cpu].total++;
+	if (queue->input_pkt_queue.qlen <= netdev_max_backlog) {
+		if (queue->input_pkt_queue.qlen) {
+			if (queue->throttle)
+				goto drop;
+
+enqueue:
+			dev_hold(skb->dev);
+			__skb_queue_tail(&queue->input_pkt_queue, skb);
+			local_irq_restore(flags);
+#ifndef OFFLINE_SAMPLE
+			get_sample_stats(this_cpu);
+#endif
+			return queue->cng_level;
+		}
+
+		if (queue->throttle) {
+			queue->throttle = 0;
+#ifdef CONFIG_NET_HW_FLOWCONTROL
+			if (atomic_dec_and_test(&netdev_dropping))
+				netdev_wakeup();
+#endif
+		}
+
+		netif_rx_schedule(&queue->backlog_dev);
+		goto enqueue;
+	}
+
+	if (!queue->throttle) {
+		queue->throttle = 1;
+		netdev_rx_stat[this_cpu].throttled++;
+#ifdef CONFIG_NET_HW_FLOWCONTROL
+		atomic_inc(&netdev_dropping);
+#endif
+	}
+
+drop:
+	netdev_rx_stat[this_cpu].dropped++;
+	local_irq_restore(flags);
+
+	kfree_skb(skb);
+	return NET_RX_DROP;
+}
+
+/* Deliver skb to an old protocol, which is not threaded well
+   or which do not understand shared skbs.
+ */
+static int deliver_to_old_ones(struct packet_type *pt,
+			       struct sk_buff *skb, int last)
+{
+	static spinlock_t net_bh_lock = SPIN_LOCK_UNLOCKED;
+	int ret = NET_RX_DROP;
+
+	if (!last) {
+		skb = skb_clone(skb, GFP_ATOMIC);
+		if (!skb)
+			goto out;
+	}
+	if (skb_is_nonlinear(skb) && skb_linearize(skb, GFP_ATOMIC))
+		goto out_kfree;
+
+	/* The assumption (correct one) is that old protocols
+	   did not depened on BHs different of NET_BH and TIMER_BH.
+	 */
+
+	/* Emulate NET_BH with special spinlock */
+	spin_lock(&net_bh_lock);
+
+	/* Disable timers and wait for all timers completion */
+	tasklet_disable(bh_task_vec+TIMER_BH);
+
+	ret = pt->func(skb, skb->dev, pt);
+
+	tasklet_hi_enable(bh_task_vec+TIMER_BH);
+	spin_unlock(&net_bh_lock);
+out:
+	return ret;
+out_kfree:
+	kfree_skb(skb);
+	goto out;
+}
+
+static __inline__ void skb_bond(struct sk_buff *skb)
+{
+	struct net_device *dev = skb->dev;
+
+	if (dev->master)
+		skb->dev = dev->master;
+}
+
+static void net_tx_action(struct softirq_action *h)
+{
+	int cpu = smp_processor_id();
+
+	if (softnet_data[cpu].completion_queue) {
+		struct sk_buff *clist;
+
+		local_irq_disable();
+		clist = softnet_data[cpu].completion_queue;
+		softnet_data[cpu].completion_queue = NULL;
+		local_irq_enable();
+
+		while (clist) {
+			struct sk_buff *skb = clist;
+			clist = clist->next;
+
+			BUG_TRAP(!atomic_read(&skb->users));
+			__kfree_skb(skb);
+		}
+	}
+
+	if (softnet_data[cpu].output_queue) {
+		struct net_device *head;
+
+		local_irq_disable();
+		head = softnet_data[cpu].output_queue;
+		softnet_data[cpu].output_queue = NULL;
+		local_irq_enable();
+
+		while (head) {
+			struct net_device *dev = head;
+			head = head->next_sched;
+
+			smp_mb__before_clear_bit();
+			clear_bit(__LINK_STATE_SCHED, &dev->state);
+
+			if (spin_trylock(&dev->queue_lock)) {
+				qdisc_run(dev);
+				spin_unlock(&dev->queue_lock);
+			} else {
+				netif_schedule(dev);
+			}
+		}
+	}
+}
+
+/**
+ *	net_call_rx_atomic
+ *	@fn: function to call
+ *
+ *	Make a function call that is atomic with respect to the protocol
+ *	layers.
+ */
+void net_call_rx_atomic(void (*fn)(void))
+{
+	br_write_lock_bh(BR_NETPROTO_LOCK);
+	fn();
+	br_write_unlock_bh(BR_NETPROTO_LOCK);
+}
+
+#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
+int (*br_handle_frame_hook)(struct sk_buff *skb) = NULL;
+#endif
+
+static __inline__ int handle_bridge(struct sk_buff *skb,
+				     struct packet_type *pt_prev)
+{
+	int ret = NET_RX_DROP;
+
+	if (pt_prev) {
+		if (!pt_prev->data)
+			ret = deliver_to_old_ones(pt_prev, skb, 0);
+		else {
+			atomic_inc(&skb->users);
+			ret = pt_prev->func(skb, skb->dev, pt_prev);
+		}
+	}
+
+	return ret;
+}
+
+
+#ifdef CONFIG_NET_DIVERT
+static inline int handle_diverter(struct sk_buff *skb)
+{
+	/* if diversion is supported on device, then divert */
+	if (skb->dev->divert && skb->dev->divert->divert)
+		divert_frame(skb);
+	return 0;
+}
+#endif   /* CONFIG_NET_DIVERT */
+
+int netif_receive_skb(struct sk_buff *skb)
+{
+	struct packet_type *ptype, *pt_prev;
+	int ret = NET_RX_DROP;
+	unsigned short type = skb->protocol;
+
+	if (!skb->stamp.tv_sec)
+		do_gettimeofday(&skb->stamp);
+
+	skb_bond(skb);
+
+	netdev_rx_stat[smp_processor_id()].total++;
+
+#ifdef CONFIG_NET_FASTROUTE
+	if (skb->pkt_type == PACKET_FASTROUTE) {
+		netdev_rx_stat[smp_processor_id()].fastroute_deferred_out++;
+		return dev_queue_xmit(skb);
+	}
+#endif
+
+	skb->h.raw = skb->nh.raw = skb->data;
+
+	pt_prev = NULL;
+	for (ptype = ptype_all; ptype; ptype = ptype->next) {
+		if (!ptype->dev || ptype->dev == skb->dev) {
+			if (pt_prev) {
+				if (!pt_prev->data) {
+					ret = deliver_to_old_ones(pt_prev,
+								  skb, 0);
+				} else {
+					atomic_inc(&skb->users);
+					ret = pt_prev->func(skb, skb->dev,
+							    pt_prev);
+				}
+			}
+			pt_prev = ptype;
+		}
+	}
+
+#ifdef CONFIG_NET_DIVERT
+	if (skb->dev->divert && skb->dev->divert->divert)
+		ret = handle_diverter(skb);
+#endif /* CONFIG_NET_DIVERT */
+
+#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
+	if (skb->dev->br_port && br_handle_frame_hook) {
+                int ret;
+
+                ret = handle_bridge(skb, pt_prev);
+                if (br_handle_frame_hook(skb) == 0)
+                        return ret;
+	}
+#endif
+
+	for (ptype = ptype_base[ntohs(type) & 15]; ptype; ptype = ptype->next) {
+		if (ptype->type == type &&
+		    (!ptype->dev || ptype->dev == skb->dev)) {
+			if (pt_prev) {
+				if (!pt_prev->data) {
+					ret = deliver_to_old_ones(pt_prev,
+								  skb, 0);
+				} else {
+					atomic_inc(&skb->users);
+					ret = pt_prev->func(skb, skb->dev,
+							    pt_prev);
+				}
+			}
+			pt_prev = ptype;
+		}
+	}
+
+	if (pt_prev) {
+		if (!pt_prev->data) {
+			ret = deliver_to_old_ones(pt_prev, skb, 1);
+		} else {
+			ret = pt_prev->func(skb, skb->dev, pt_prev);
+		}
+	} else {
+		kfree_skb(skb);
+		/* Jamal, now you will not able to escape explaining
+		 * me how you were going to use this. :-)
+		 */
+		ret = NET_RX_DROP;
+	}
+
+	return ret;
+}
+
+static int process_backlog(struct net_device *backlog_dev, int *budget)
+{
+	int work = 0;
+	int quota = min(backlog_dev->quota, *budget);
+	int this_cpu = smp_processor_id();
+	struct softnet_data *queue = &softnet_data[this_cpu];
+	unsigned long start_time = jiffies;
+
+	for (;;) {
+		struct sk_buff *skb;
+		struct net_device *dev;
+
+		local_irq_disable();
+		skb = __skb_dequeue(&queue->input_pkt_queue);
+		if (!skb)
+			goto job_done;
+		local_irq_enable();
+
+		dev = skb->dev;
+
+		netif_receive_skb(skb);
+
+		dev_put(dev);
+
+		work++;
+
+		if (work >= quota || jiffies - start_time > 1)
+			break;
+
+#ifdef CONFIG_NET_HW_FLOWCONTROL
+		if (queue->throttle &&
+		    queue->input_pkt_queue.qlen < no_cong_thresh ) {
+			if (atomic_dec_and_test(&netdev_dropping)) {
+				queue->throttle = 0;
+				netdev_wakeup();
+				break;
+			}
+		}
+#endif
+	}
+
+	backlog_dev->quota -= work;
+	*budget -= work;
+	return -1;
+
+job_done:
+	backlog_dev->quota -= work;
+	*budget -= work;
+
+	list_del(&backlog_dev->poll_list);
+	clear_bit(__LINK_STATE_RX_SCHED, &backlog_dev->state);
+
+	if (queue->throttle) {
+		queue->throttle = 0;
+#ifdef CONFIG_NET_HW_FLOWCONTROL
+		if (atomic_dec_and_test(&netdev_dropping))
+			netdev_wakeup();
+#endif
+	}
+	local_irq_enable();
+	return 0;
+}
+
+static void net_rx_action(struct softirq_action *h)
+{
+	int this_cpu = smp_processor_id();
+	struct softnet_data *queue = &softnet_data[this_cpu];
+	unsigned long start_time = jiffies;
+	int budget = netdev_max_backlog;
+
+	br_read_lock(BR_NETPROTO_LOCK);
+	local_irq_disable();
+
+	while (!list_empty(&queue->poll_list)) {
+		struct net_device *dev;
+
+		if (budget <= 0 || jiffies - start_time > 1)
+			goto softnet_break;
+
+		local_irq_enable();
+
+		dev = list_entry(queue->poll_list.next,
+				 struct net_device, poll_list);
+
+		if (dev->quota <= 0 || dev->poll(dev, &budget)) {
+			local_irq_disable();
+			list_del(&dev->poll_list);
+			list_add_tail(&dev->poll_list, &queue->poll_list);
+			if (dev->quota < 0)
+				dev->quota += dev->weight;
+			else
+				dev->quota = dev->weight;
+		} else {
+			dev_put(dev);
+			local_irq_disable();
+		}
+	}
+out:
+	local_irq_enable();
+	br_read_unlock(BR_NETPROTO_LOCK);
+	return;
+
+softnet_break:
+	netdev_rx_stat[this_cpu].time_squeeze++;
+	__cpu_raise_softirq(this_cpu, NET_RX_SOFTIRQ);
+	goto out;
+}
+
+static gifconf_func_t * gifconf_list [NPROTO];
+
+/**
+ *	register_gifconf	-	register a SIOCGIF handler
+ *	@family: Address family
+ *	@gifconf: Function handler
+ *
+ *	Register protocol dependent address dumping routines. The handler
+ *	that is passed must not be freed or reused until it has been replaced
+ *	by another handler.
+ */
+int register_gifconf(unsigned int family, gifconf_func_t * gifconf)
+{
+	if (family >= NPROTO)
+		return -EINVAL;
+	gifconf_list[family] = gifconf;
+	return 0;
+}
+
+
+/*
+ *	Map an interface index to its name (SIOCGIFNAME)
+ */
+
+/*
+ *	We need this ioctl for efficient implementation of the
+ *	if_indextoname() function required by the IPv6 API.  Without
+ *	it, we would have to search all the interfaces to find a
+ *	match.  --pb
+ */
+
+static int dev_ifname(struct ifreq *arg)
+{
+	struct net_device *dev;
+	struct ifreq ifr;
+
+	/*
+	 *	Fetch the caller's info block.
+	 */
+
+	if (copy_from_user(&ifr, arg, sizeof(struct ifreq)))
+		return -EFAULT;
+
+	read_lock(&dev_base_lock);
+	dev = __dev_get_by_index(ifr.ifr_ifindex);
+	if (!dev) {
+		read_unlock(&dev_base_lock);
+		return -ENODEV;
+	}
+
+	strcpy(ifr.ifr_name, dev->name);
+	read_unlock(&dev_base_lock);
+
+	if (copy_to_user(arg, &ifr, sizeof(struct ifreq)))
+		return -EFAULT;
+	return 0;
+}
+
+/*
+ *	Perform a SIOCGIFCONF call. This structure will change
+ *	size eventually, and there is nothing I can do about it.
+ *	Thus we will need a 'compatibility mode'.
+ */
+
+static int dev_ifconf(char *arg)
+{
+	struct ifconf ifc;
+	struct net_device *dev;
+	char *pos;
+	int len;
+	int total;
+	int i;
+
+	/*
+	 *	Fetch the caller's info block.
+	 */
+
+	if (copy_from_user(&ifc, arg, sizeof(struct ifconf)))
+		return -EFAULT;
+
+	pos = ifc.ifc_buf;
+	len = ifc.ifc_len;
+
+	/*
+	 *	Loop over the interfaces, and write an info block for each.
+	 */
+
+	total = 0;
+	for (dev = dev_base; dev; dev = dev->next) {
+		for (i = 0; i < NPROTO; i++) {
+			if (gifconf_list[i]) {
+				int done;
+				if (!pos)
+					done = gifconf_list[i](dev, NULL, 0);
+				else
+					done = gifconf_list[i](dev, pos + total,
+							       len - total);
+				if (done < 0)
+					return -EFAULT;
+				total += done;
+			}
+		}
+  	}
+
+	/*
+	 *	All done.  Write the updated control block back to the caller.
+	 */
+	ifc.ifc_len = total;
+
+	/*
+	 * 	Both BSD and Solaris return 0 here, so we do too.
+	 */
+	return copy_to_user(arg, &ifc, sizeof(struct ifconf)) ? -EFAULT : 0;
+}
+
+/*
+ *	This is invoked by the /proc filesystem handler to display a device
+ *	in detail.
+ */
+
+#ifdef CONFIG_PROC_FS
+
+static int sprintf_stats(char *buffer, struct net_device *dev)
+{
+	struct net_device_stats *stats = dev->get_stats ? dev->get_stats(dev) :
+							  NULL;
+	int size;
+
+	if (stats)
+		size = sprintf(buffer, "%6s:%8lu %7lu %4lu %4lu %4lu %5lu "
+				       "%10lu %9lu %8lu %7lu %4lu %4lu %4lu "
+				       "%5lu %7lu %10lu\n",
+ 		   dev->name,
+		   stats->rx_bytes,
+		   stats->rx_packets, stats->rx_errors,
+		   stats->rx_dropped + stats->rx_missed_errors,
+		   stats->rx_fifo_errors,
+		   stats->rx_length_errors + stats->rx_over_errors +
+		   	stats->rx_crc_errors + stats->rx_frame_errors,
+		   stats->rx_compressed, stats->multicast,
+		   stats->tx_bytes,
+		   stats->tx_packets, stats->tx_errors, stats->tx_dropped,
+		   stats->tx_fifo_errors, stats->collisions,
+		   stats->tx_carrier_errors + stats->tx_aborted_errors +
+		   	stats->tx_window_errors + stats->tx_heartbeat_errors,
+		   stats->tx_compressed);
+	else
+		size = sprintf(buffer, "%6s: No statistics available.\n",
+			       dev->name);
+
+	return size;
+}
+
+/*
+ *	Called from the PROCfs module. This now uses the new arbitrary sized
+ *	/proc/net interface to create /proc/net/dev
+ */
+static int dev_get_info(char *buffer, char **start, off_t offset, int length)
+{
+	int len = 0;
+	off_t begin = 0;
+	off_t pos = 0;
+	int size;
+	struct net_device *dev;
+
+	size = sprintf(buffer,
+		"Inter-|   Receive                                                |  Transmit\n"
+		" face |bytes    packets errs drop fifo frame compressed multicast|bytes    packets errs drop fifo colls carrier compressed\n");
+
+	pos += size;
+	len += size;
+
+	read_lock(&dev_base_lock);
+	for (dev = dev_base; dev; dev = dev->next) {
+		size = sprintf_stats(buffer+len, dev);
+		len += size;
+		pos = begin + len;
+
+		if (pos < offset) {
+			len = 0;
+			begin = pos;
+		}
+		if (pos > offset + length)
+			break;
+	}
+	read_unlock(&dev_base_lock);
+
+	*start = buffer + (offset - begin);	/* Start of wanted data */
+	len -= offset - begin;			/* Start slop */
+	if (len > length)
+		len = length;			/* Ending slop */
+	if (len < 0)
+		len = 0;
+	return len;
+}
+
+static int dev_proc_stats(char *buffer, char **start, off_t offset,
+			  int length, int *eof, void *data)
+{
+	int i;
+	int len = 0;
+
+	for (i = 0; i < NR_CPUS; i++) {
+		if (!cpu_online(i))
+			continue;
+
+		len += sprintf(buffer + len, "%08x %08x %08x %08x %08x %08x "
+					     "%08x %08x %08x\n",
+			       netdev_rx_stat[i].total,
+			       netdev_rx_stat[i].dropped,
+			       netdev_rx_stat[i].time_squeeze,
+			       netdev_rx_stat[i].throttled,
+			       netdev_rx_stat[i].fastroute_hit,
+			       netdev_rx_stat[i].fastroute_success,
+			       netdev_rx_stat[i].fastroute_defer,
+			       netdev_rx_stat[i].fastroute_deferred_out,
+#if 0
+			       netdev_rx_stat[i].fastroute_latency_reduction
+#else
+			       netdev_rx_stat[i].cpu_collision
+#endif
+			       );
+	}
+
+	len -= offset;
+
+	if (len > length)
+		len = length;
+	if (len < 0)
+		len = 0;
+
+	*start = buffer + offset;
+	*eof = 1;
+
+	return len;
+}
+
+#endif	/* CONFIG_PROC_FS */
+
+
+/**
+ *	netdev_set_master	-	set up master/slave pair
+ *	@slave: slave device
+ *	@master: new master device
+ *
+ *	Changes the master device of the slave. Pass %NULL to break the
+ *	bonding. The caller must hold the RTNL semaphore. On a failure
+ *	a negative errno code is returned. On success the reference counts
+ *	are adjusted, %RTM_NEWLINK is sent to the routing socket and the
+ *	function returns zero.
+ */
+int netdev_set_master(struct net_device *slave, struct net_device *master)
+{
+	struct net_device *old = slave->master;
+
+	ASSERT_RTNL();
+
+	if (master) {
+		if (old)
+			return -EBUSY;
+		dev_hold(master);
+	}
+
+	br_write_lock_bh(BR_NETPROTO_LOCK);
+	slave->master = master;
+	br_write_unlock_bh(BR_NETPROTO_LOCK);
+
+	if (old)
+		dev_put(old);
+
+	if (master)
+		slave->flags |= IFF_SLAVE;
+	else
+		slave->flags &= ~IFF_SLAVE;
+
+	rtmsg_ifinfo(RTM_NEWLINK, slave, IFF_SLAVE);
+	return 0;
+}
+
+/**
+ *	dev_set_promiscuity	- update promiscuity count on a device
+ *	@dev: device
+ *	@inc: modifier
+ *
+ *	Add or remove promsicuity from a device. While the count in the device
+ *	remains above zero the interface remains promiscuous. Once it hits zero
+ *	the device reverts back to normal filtering operation. A negative inc
+ *	value is used to drop promiscuity on the device.
+ */
+void dev_set_promiscuity(struct net_device *dev, int inc)
+{
+	unsigned short old_flags = dev->flags;
+
+	dev->flags |= IFF_PROMISC;
+	if ((dev->promiscuity += inc) == 0)
+		dev->flags &= ~IFF_PROMISC;
+	if (dev->flags ^ old_flags) {
+#ifdef CONFIG_NET_FASTROUTE
+		if (dev->flags & IFF_PROMISC) {
+			netdev_fastroute_obstacles++;
+			dev_clear_fastroute(dev);
+		} else
+			netdev_fastroute_obstacles--;
+#endif
+		dev_mc_upload(dev);
+		printk(KERN_INFO "device %s %s promiscuous mode\n",
+		       dev->name, (dev->flags & IFF_PROMISC) ? "entered" :
+		       					       "left");
+	}
+}
+
+/**
+ *	dev_set_allmulti	- update allmulti count on a device
+ *	@dev: device
+ *	@inc: modifier
+ *
+ *	Add or remove reception of all multicast frames to a device. While the
+ *	count in the device remains above zero the interface remains listening
+ *	to all interfaces. Once it hits zero the device reverts back to normal
+ *	filtering operation. A negative @inc value is used to drop the counter
+ *	when releasing a resource needing all multicasts.
+ */
+
+void dev_set_allmulti(struct net_device *dev, int inc)
+{
+	unsigned short old_flags = dev->flags;
+
+	dev->flags |= IFF_ALLMULTI;
+	if ((dev->allmulti += inc) == 0)
+		dev->flags &= ~IFF_ALLMULTI;
+	if (dev->flags ^ old_flags)
+		dev_mc_upload(dev);
+}
+
+int dev_change_flags(struct net_device *dev, unsigned flags)
+{
+	int ret;
+	int old_flags = dev->flags;
+
+	/*
+	 *	Set the flags on our device.
+	 */
+
+	dev->flags = (flags & (IFF_DEBUG | IFF_NOTRAILERS | IFF_NOARP |
+			       IFF_DYNAMIC | IFF_MULTICAST | IFF_PORTSEL |
+			       IFF_AUTOMEDIA)) |
+		     (dev->flags & (IFF_UP | IFF_VOLATILE | IFF_PROMISC |
+				    IFF_ALLMULTI));
+
+	/*
+	 *	Load in the correct multicast list now the flags have changed.
+	 */
+
+	dev_mc_upload(dev);
+
+	/*
+	 *	Have we downed the interface. We handle IFF_UP ourselves
+	 *	according to user attempts to set it, rather than blindly
+	 *	setting it.
+	 */
+
+	ret = 0;
+	if ((old_flags ^ flags) & IFF_UP) {	/* Bit is different  ? */
+		ret = ((old_flags & IFF_UP) ? dev_close : dev_open)(dev);
+
+		if (!ret)
+			dev_mc_upload(dev);
+	}
+
+	if (dev->flags & IFF_UP &&
+	    ((old_flags ^ dev->flags) &~ (IFF_UP | IFF_PROMISC | IFF_ALLMULTI |
+					  IFF_VOLATILE)))
+		notifier_call_chain(&netdev_chain, NETDEV_CHANGE, dev);
+
+	if ((flags ^ dev->gflags) & IFF_PROMISC) {
+		int inc = (flags & IFF_PROMISC) ? +1 : -1;
+		dev->gflags ^= IFF_PROMISC;
+		dev_set_promiscuity(dev, inc);
+	}
+
+	/* NOTE: order of synchronization of IFF_PROMISC and IFF_ALLMULTI
+	   is important. Some (broken) drivers set IFF_PROMISC, when
+	   IFF_ALLMULTI is requested not asking us and not reporting.
+	 */
+	if ((flags ^ dev->gflags) & IFF_ALLMULTI) {
+		int inc = (flags & IFF_ALLMULTI) ? +1 : -1;
+		dev->gflags ^= IFF_ALLMULTI;
+		dev_set_allmulti(dev, inc);
+	}
+
+	if (old_flags ^ dev->flags)
+		rtmsg_ifinfo(RTM_NEWLINK, dev, old_flags ^ dev->flags);
+
+	return ret;
+}
+
+/*
+ *	Perform the SIOCxIFxxx calls.
+ */
+static int dev_ifsioc(struct ifreq *ifr, unsigned int cmd)
+{
+	int err;
+	struct net_device *dev = __dev_get_by_name(ifr->ifr_name);
+
+	if (!dev)
+		return -ENODEV;
+
+	switch (cmd) {
+		case SIOCGIFFLAGS:	/* Get interface flags */
+			ifr->ifr_flags = (dev->flags & ~(IFF_PROMISC |
+							 IFF_ALLMULTI |
+							 IFF_RUNNING)) | 
+					 (dev->gflags & (IFF_PROMISC |
+							 IFF_ALLMULTI));
+			if (netif_running(dev) && netif_carrier_ok(dev))
+				ifr->ifr_flags |= IFF_RUNNING;
+			return 0;
+
+		case SIOCSIFFLAGS:	/* Set interface flags */
+			return dev_change_flags(dev, ifr->ifr_flags);
+
+		case SIOCGIFMETRIC:	/* Get the metric on the interface
+					   (currently unused) */
+			ifr->ifr_metric = 0;
+			return 0;
+
+		case SIOCSIFMETRIC:	/* Set the metric on the interface
+					   (currently unused) */
+			return -EOPNOTSUPP;
+
+		case SIOCGIFMTU:	/* Get the MTU of a device */
+			ifr->ifr_mtu = dev->mtu;
+			return 0;
+
+		case SIOCSIFMTU:	/* Set the MTU of a device */
+			if (ifr->ifr_mtu == dev->mtu)
+				return 0;
+
+			/*
+			 *	MTU must be positive.
+			 */
+			if (ifr->ifr_mtu < 0)
+				return -EINVAL;
+
+			if (!netif_device_present(dev))
+				return -ENODEV;
+
+			err = 0;
+			if (dev->change_mtu)
+				err = dev->change_mtu(dev, ifr->ifr_mtu);
+			else
+				dev->mtu = ifr->ifr_mtu;
+			if (!err && dev->flags & IFF_UP)
+				notifier_call_chain(&netdev_chain,
+						    NETDEV_CHANGEMTU, dev);
+			return err;
+
+		case SIOCGIFHWADDR:
+			memcpy(ifr->ifr_hwaddr.sa_data, dev->dev_addr,
+			       MAX_ADDR_LEN);
+			ifr->ifr_hwaddr.sa_family = dev->type;
+			return 0;
+
+		case SIOCSIFHWADDR:
+			if (!dev->set_mac_address)
+				return -EOPNOTSUPP;
+			if (ifr->ifr_hwaddr.sa_family != dev->type)
+				return -EINVAL;
+			if (!netif_device_present(dev))
+				return -ENODEV;
+			err = dev->set_mac_address(dev, &ifr->ifr_hwaddr);
+			if (!err)
+				notifier_call_chain(&netdev_chain,
+						    NETDEV_CHANGEADDR, dev);
+			return err;
+
+		case SIOCSIFHWBROADCAST:
+			if (ifr->ifr_hwaddr.sa_family != dev->type)
+				return -EINVAL;
+			memcpy(dev->broadcast, ifr->ifr_hwaddr.sa_data,
+			       MAX_ADDR_LEN);
+			notifier_call_chain(&netdev_chain,
+					    NETDEV_CHANGEADDR, dev);
+			return 0;
+
+		case SIOCGIFMAP:
+			ifr->ifr_map.mem_start = dev->mem_start;
+			ifr->ifr_map.mem_end   = dev->mem_end;
+			ifr->ifr_map.base_addr = dev->base_addr;
+			ifr->ifr_map.irq       = dev->irq;
+			ifr->ifr_map.dma       = dev->dma;
+			ifr->ifr_map.port      = dev->if_port;
+			return 0;
+
+		case SIOCSIFMAP:
+			if (dev->set_config) {
+				if (!netif_device_present(dev))
+					return -ENODEV;
+				return dev->set_config(dev, &ifr->ifr_map);
+			}
+			return -EOPNOTSUPP;
+
+		case SIOCADDMULTI:
+			if (!dev->set_multicast_list ||
+			    ifr->ifr_hwaddr.sa_family != AF_UNSPEC)
+				return -EINVAL;
+			if (!netif_device_present(dev))
+				return -ENODEV;
+			dev_mc_add(dev, ifr->ifr_hwaddr.sa_data,
+				   dev->addr_len, 1);
+			return 0;
+
+		case SIOCDELMULTI:
+			if (!dev->set_multicast_list ||
+			    ifr->ifr_hwaddr.sa_family != AF_UNSPEC)
+				return -EINVAL;
+			if (!netif_device_present(dev))
+				return -ENODEV;
+			dev_mc_delete(dev, ifr->ifr_hwaddr.sa_data,
+				      dev->addr_len, 1);
+			return 0;
+
+		case SIOCGIFINDEX:
+			ifr->ifr_ifindex = dev->ifindex;
+			return 0;
+
+		case SIOCGIFTXQLEN:
+			ifr->ifr_qlen = dev->tx_queue_len;
+			return 0;
+
+		case SIOCSIFTXQLEN:
+			if (ifr->ifr_qlen < 0)
+				return -EINVAL;
+			dev->tx_queue_len = ifr->ifr_qlen;
+			return 0;
+
+		case SIOCSIFNAME:
+			if (dev->flags & IFF_UP)
+				return -EBUSY;
+			if (__dev_get_by_name(ifr->ifr_newname))
+				return -EEXIST;
+			memcpy(dev->name, ifr->ifr_newname, IFNAMSIZ);
+			dev->name[IFNAMSIZ - 1] = 0;
+			notifier_call_chain(&netdev_chain,
+					    NETDEV_CHANGENAME, dev);
+			return 0;
+
+		/*
+		 *	Unknown or private ioctl
+		 */
+
+		default:
+			if ((cmd >= SIOCDEVPRIVATE &&
+			    cmd <= SIOCDEVPRIVATE + 15) ||
+			    cmd == SIOCBONDENSLAVE ||
+			    cmd == SIOCBONDRELEASE ||
+			    cmd == SIOCBONDSETHWADDR ||
+			    cmd == SIOCBONDSLAVEINFOQUERY ||
+			    cmd == SIOCBONDINFOQUERY ||
+			    cmd == SIOCBONDCHANGEACTIVE ||
+			    cmd == SIOCETHTOOL ||
+			    cmd == SIOCGMIIPHY ||
+			    cmd == SIOCGMIIREG ||
+			    cmd == SIOCSMIIREG ||
+			    cmd == SIOCWANDEV) {
+				err = -EOPNOTSUPP;
+				if (dev->do_ioctl) {
+					if (netif_device_present(dev))
+						err = dev->do_ioctl(dev, ifr,
+								    cmd);
+					else
+						err = -ENODEV;
+				}
+			} else
+				err = -EINVAL;
+
+	}
+	return err;
+}
+
+/*
+ *	This function handles all "interface"-type I/O control requests. The actual
+ *	'doing' part of this is dev_ifsioc above.
+ */
+
+/**
+ *	dev_ioctl	-	network device ioctl
+ *	@cmd: command to issue
+ *	@arg: pointer to a struct ifreq in user space
+ *
+ *	Issue ioctl functions to devices. This is normally called by the
+ *	user space syscall interfaces but can sometimes be useful for
+ *	other purposes. The return value is the return from the syscall if
+ *	positive or a negative errno code on error.
+ */
+
+int dev_ioctl(unsigned int cmd, void *arg)
+{
+	struct ifreq ifr;
+	int ret;
+	char *colon;
+
+	/* One special case: SIOCGIFCONF takes ifconf argument
+	   and requires shared lock, because it sleeps writing
+	   to user space.
+	 */
+
+	if (cmd == SIOCGIFCONF) {
+		rtnl_shlock();
+		ret = dev_ifconf((char *) arg);
+		rtnl_shunlock();
+		return ret;
+	}
+	if (cmd == SIOCGIFNAME)
+		return dev_ifname((struct ifreq *)arg);
+
+	if (copy_from_user(&ifr, arg, sizeof(struct ifreq)))
+		return -EFAULT;
+
+	ifr.ifr_name[IFNAMSIZ-1] = 0;
+
+	colon = strchr(ifr.ifr_name, ':');
+	if (colon)
+		*colon = 0;
+
+	/*
+	 *	See which interface the caller is talking about.
+	 */
+
+	switch (cmd) {
+		/*
+		 *	These ioctl calls:
+		 *	- can be done by all.
+		 *	- atomic and do not require locking.
+		 *	- return a value
+		 */
+		case SIOCGIFFLAGS:
+		case SIOCGIFMETRIC:
+		case SIOCGIFMTU:
+		case SIOCGIFHWADDR:
+		case SIOCGIFSLAVE:
+		case SIOCGIFMAP:
+		case SIOCGIFINDEX:
+		case SIOCGIFTXQLEN:
+			dev_load(ifr.ifr_name);
+			read_lock(&dev_base_lock);
+			ret = dev_ifsioc(&ifr, cmd);
+			read_unlock(&dev_base_lock);
+			if (!ret) {
+				if (colon)
+					*colon = ':';
+				if (copy_to_user(arg, &ifr,
+						 sizeof(struct ifreq)))
+					ret = -EFAULT;
+			}
+			return ret;
+
+		/*
+		 *	These ioctl calls:
+		 *	- require superuser power.
+		 *	- require strict serialization.
+		 *	- return a value
+		 */
+		case SIOCETHTOOL:
+		case SIOCGMIIPHY:
+		case SIOCGMIIREG:
+			if (!capable(CAP_NET_ADMIN))
+				return -EPERM;
+			dev_load(ifr.ifr_name);
+			dev_probe_lock();
+			rtnl_lock();
+			ret = dev_ifsioc(&ifr, cmd);
+			rtnl_unlock();
+			dev_probe_unlock();
+			if (!ret) {
+				if (colon)
+					*colon = ':';
+				if (copy_to_user(arg, &ifr,
+						 sizeof(struct ifreq)))
+					ret = -EFAULT;
+			}
+			return ret;
+
+		/*
+		 *	These ioctl calls:
+		 *	- require superuser power.
+		 *	- require strict serialization.
+		 *	- do not return a value
+		 */
+		case SIOCSIFFLAGS:
+		case SIOCSIFMETRIC:
+		case SIOCSIFMTU:
+		case SIOCSIFMAP:
+		case SIOCSIFHWADDR:
+		case SIOCSIFSLAVE:
+		case SIOCADDMULTI:
+		case SIOCDELMULTI:
+		case SIOCSIFHWBROADCAST:
+		case SIOCSIFTXQLEN:
+		case SIOCSIFNAME:
+		case SIOCSMIIREG:
+		case SIOCBONDENSLAVE:
+		case SIOCBONDRELEASE:
+		case SIOCBONDSETHWADDR:
+		case SIOCBONDSLAVEINFOQUERY:
+		case SIOCBONDINFOQUERY:
+		case SIOCBONDCHANGEACTIVE:
+			if (!capable(CAP_NET_ADMIN))
+				return -EPERM;
+			dev_load(ifr.ifr_name);
+			dev_probe_lock();
+			rtnl_lock();
+			ret = dev_ifsioc(&ifr, cmd);
+			rtnl_unlock();
+			dev_probe_unlock();
+			return ret;
+
+		case SIOCGIFMEM:
+			/* Get the per device memory space. We can add this but
+			 * currently do not support it */
+		case SIOCSIFMEM:
+			/* Set the per device memory buffer space.
+			 * Not applicable in our case */
+		case SIOCSIFLINK:
+			return -EINVAL;
+
+		/*
+		 *	Unknown or private ioctl.
+		 */
+		default:
+			if (cmd == SIOCWANDEV ||
+			    (cmd >= SIOCDEVPRIVATE &&
+			     cmd <= SIOCDEVPRIVATE + 15)) {
+				dev_load(ifr.ifr_name);
+				dev_probe_lock();
+				rtnl_lock();
+				ret = dev_ifsioc(&ifr, cmd);
+				rtnl_unlock();
+				dev_probe_unlock();
+				if (!ret && copy_to_user(arg, &ifr,
+							 sizeof(struct ifreq)))
+					ret = -EFAULT;
+				return ret;
+			}
+#ifdef WIRELESS_EXT
+			/* Take care of Wireless Extensions */
+			if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) {
+				/* If command is `set a parameter', or
+				 * `get the encoding parameters', check if
+				 * the user has the right to do it */
+				if (IW_IS_SET(cmd) || cmd == SIOCGIWENCODE) {
+					if (!capable(CAP_NET_ADMIN))
+						return -EPERM;
+				}
+				dev_load(ifr.ifr_name);
+				rtnl_lock();
+				/* Follow me in net/core/wireless.c */
+				ret = wireless_process_ioctl(&ifr, cmd);
+				rtnl_unlock();
+				if (!ret && IW_IS_GET(cmd) &&
+				    copy_to_user(arg, &ifr,
+					    	 sizeof(struct ifreq)))
+					ret = -EFAULT;
+				return ret;
+			}
+#endif	/* WIRELESS_EXT */
+			return -EINVAL;
+	}
+}
+
+
+/**
+ *	dev_new_index	-	allocate an ifindex
+ *
+ *	Returns a suitable unique value for a new device interface
+ *	number.  The caller must hold the rtnl semaphore or the
+ *	dev_base_lock to be sure it remains unique.
+ */
+int dev_new_index(void)
+{
+	static int ifindex;
+	for (;;) {
+		if (++ifindex <= 0)
+			ifindex = 1;
+		if (!__dev_get_by_index(ifindex))
+			return ifindex;
+	}
+}
+
+static int dev_boot_phase = 1;
+
+/**
+ *	register_netdevice	- register a network device
+ *	@dev: device to register
+ *
+ *	Take a completed network device structure and add it to the kernel
+ *	interfaces. A %NETDEV_REGISTER message is sent to the netdev notifier
+ *	chain. 0 is returned on success. A negative errno code is returned
+ *	on a failure to set up the device, or if the name is a duplicate.
+ *
+ *	Callers must hold the rtnl semaphore.  See the comment at the
+ *	end of Space.c for details about the locking.  You may want
+ *	register_netdev() instead of this.
+ *
+ *	BUGS:
+ *	The locking appears insufficient to guarantee two parallel registers
+ *	will not get the same name.
+ */
+
+int register_netdevice(struct net_device *dev)
+{
+	struct net_device *d, **dp;
+	int ret;
+
+	BUG_ON(dev_boot_phase);
+
+	spin_lock_init(&dev->queue_lock);
+	spin_lock_init(&dev->xmit_lock);
+	dev->xmit_lock_owner = -1;
+#ifdef CONFIG_NET_FASTROUTE
+	dev->fastpath_lock = RW_LOCK_UNLOCKED;
+#endif
+
+#ifdef CONFIG_NET_DIVERT
+	ret = alloc_divert_blk(dev);
+	if (ret)
+		goto out;
+#endif /* CONFIG_NET_DIVERT */
+
+	dev->iflink = -1;
+
+	/* Init, if this function is available */
+	ret = -EIO;
+	if (dev->init && dev->init(dev))
+		goto out_err;
+
+	dev->ifindex = dev_new_index();
+	if (dev->iflink == -1)
+		dev->iflink = dev->ifindex;
+
+	/* Check for existence, and append to tail of chain */
+	ret = -EEXIST;
+	for (dp = &dev_base; (d = *dp) != NULL; dp = &d->next) {
+		if (d == dev || !strcmp(d->name, dev->name))
+			goto out_err;
+	}
+	/*
+	 *	nil rebuild_header routine,
+	 *	that should be never called and used as just bug trap.
+	 */
+
+	if (!dev->rebuild_header)
+		dev->rebuild_header = default_rebuild_header;
+
+	/*
+	 *	Default initial state at registry is that the
+	 *	device is present.
+	 */
+
+	set_bit(__LINK_STATE_PRESENT, &dev->state);
+
+	dev->next = NULL;
+	dev_init_scheduler(dev);
+	write_lock_bh(&dev_base_lock);
+	*dp = dev;
+	dev_hold(dev);
+	dev->deadbeaf = 0;
+	write_unlock_bh(&dev_base_lock);
+
+	/* Notify protocols, that a new device appeared. */
+	notifier_call_chain(&netdev_chain, NETDEV_REGISTER, dev);
+
+	net_run_sbin_hotplug(dev, "register");
+	ret = 0;
+
+out:
+	return ret;
+out_err:
+#ifdef CONFIG_NET_DIVERT
+	free_divert_blk(dev);
+#endif
+	goto out;
+}
+
+/**
+ *	netdev_finish_unregister - complete unregistration
+ *	@dev: device
+ *
+ *	Destroy and free a dead device. A value of zero is returned on
+ *	success.
+ */
+int netdev_finish_unregister(struct net_device *dev)
+{
+	BUG_TRAP(!dev->ip_ptr);
+	BUG_TRAP(!dev->ip6_ptr);
+	BUG_TRAP(!dev->dn_ptr);
+
+	if (!dev->deadbeaf) {
+		printk(KERN_ERR "Freeing alive device %p, %s\n",
+		       dev, dev->name);
+		return 0;
+	}
+#ifdef NET_REFCNT_DEBUG
+	printk(KERN_DEBUG "netdev_finish_unregister: %s%s.\n", dev->name,
+	       (dev->features & NETIF_F_DYNALLOC)?"":", old style");
+#endif
+	if (dev->destructor)
+		dev->destructor(dev);
+	if (dev->features & NETIF_F_DYNALLOC)
+		kfree(dev);
+	return 0;
+}
+
+/**
+ *	unregister_netdevice - remove device from the kernel
+ *	@dev: device
+ *
+ *	This function shuts down a device interface and removes it
+ *	from the kernel tables. On success 0 is returned, on a failure
+ *	a negative errno code is returned.
+ *
+ *	Callers must hold the rtnl semaphore.  See the comment at the
+ *	end of Space.c for details about the locking.  You may want
+ *	unregister_netdev() instead of this.
+ */
+
+int unregister_netdevice(struct net_device *dev)
+{
+	unsigned long now, warning_time;
+	struct net_device *d, **dp;
+
+	BUG_ON(dev_boot_phase);
+
+	/* If device is running, close it first. */
+	if (dev->flags & IFF_UP)
+		dev_close(dev);
+
+	BUG_TRAP(!dev->deadbeaf);
+	dev->deadbeaf = 1;
+
+	/* And unlink it from device chain. */
+	for (dp = &dev_base; (d = *dp) != NULL; dp = &d->next) {
+		if (d == dev) {
+			write_lock_bh(&dev_base_lock);
+			*dp = d->next;
+			write_unlock_bh(&dev_base_lock);
+			break;
+		}
+	}
+	if (!d) {
+		printk(KERN_DEBUG "unregister_netdevice: device %s/%p never "
+				  "was registered\n", dev->name, dev);
+		return -ENODEV;
+	}
+
+	/* Synchronize to net_rx_action. */
+	br_write_lock_bh(BR_NETPROTO_LOCK);
+	br_write_unlock_bh(BR_NETPROTO_LOCK);
+
+
+#ifdef CONFIG_NET_FASTROUTE
+	dev_clear_fastroute(dev);
+#endif
+
+	/* Shutdown queueing discipline. */
+	dev_shutdown(dev);
+	
+	net_run_sbin_hotplug(dev, "unregister");
+	
+	/* Notify protocols, that we are about to destroy
+	   this device. They should clean all the things.
+	*/
+	notifier_call_chain(&netdev_chain, NETDEV_UNREGISTER, dev);
+	
+	/*
+	 *	Flush the multicast chain
+	 */
+	dev_mc_discard(dev);
+
+	if (dev->uninit)
+		dev->uninit(dev);
+
+	/* Notifier chain MUST detach us from master device. */
+	BUG_TRAP(!dev->master);
+
+#ifdef CONFIG_NET_DIVERT
+	free_divert_blk(dev);
+#endif
+
+	if (dev->features & NETIF_F_DYNALLOC) {
+#ifdef NET_REFCNT_DEBUG
+		if (atomic_read(&dev->refcnt) != 1)
+			printk(KERN_DEBUG "unregister_netdevice: holding %s "
+					  "refcnt=%d\n",
+			       dev->name, atomic_read(&dev->refcnt) - 1);
+#endif
+		goto out;
+	}
+
+	/* Last reference is our one */
+	if (atomic_read(&dev->refcnt) == 1)
+		goto out;
+
+#ifdef NET_REFCNT_DEBUG
+	printk(KERN_DEBUG "unregister_netdevice: waiting %s refcnt=%d\n",
+	       dev->name, atomic_read(&dev->refcnt));
+#endif
+
+	/* EXPLANATION. If dev->refcnt is not now 1 (our own reference)
+	   it means that someone in the kernel still has a reference
+	   to this device and we cannot release it.
+
+	   "New style" devices have destructors, hence we can return from this
+	   function and destructor will do all the work later. As of kernel
+	   2.4.0 there are very few "New Style" devices.
+
+	   "Old style" devices expect that the device is free of any references
+	   upon exit from this function.
+	   We cannot return from this function until all such references have
+	   fallen away. This is because the caller of this function will
+	   probably immediately kfree(*dev) and then be unloaded via
+	   sys_delete_module.
+
+	   So, we linger until all references fall away.  The duration of the
+	   linger is basically unbounded! It is driven by, for example, the
+	   current setting of sysctl_ipfrag_time.
+
+	   After 1 second, we start to rebroadcast unregister notifications
+	   in hope that careless clients will release the device.
+
+	 */
+
+	now = warning_time = jiffies;
+	while (atomic_read(&dev->refcnt) != 1) {
+		if ((jiffies - now) > 1 * HZ) {
+			/* Rebroadcast unregister notification */
+			notifier_call_chain(&netdev_chain,
+					    NETDEV_UNREGISTER, dev);
+		}
+		current->state = TASK_INTERRUPTIBLE;
+		schedule_timeout(HZ / 4);
+		current->state = TASK_RUNNING;
+		if ((jiffies - warning_time) > 10 * HZ) {
+			printk(KERN_EMERG "unregister_netdevice: waiting for "
+			       "%s to become free. Usage count = %d\n",
+			       dev->name, atomic_read(&dev->refcnt));
+			warning_time = jiffies;
+		}
+	}
+out:
+	dev_put(dev);
+	return 0;
+}
+
+
+/*
+ *	Initialize the DEV module. At boot time this walks the device list and
+ *	unhooks any devices that fail to initialise (normally hardware not
+ *	present) and leaves us with a valid list of present and active devices.
+ *
+ */
+
+extern void net_device_init(void);
+extern void ip_auto_config(void);
+#ifdef CONFIG_NET_DIVERT
+extern void dv_init(void);
+#endif /* CONFIG_NET_DIVERT */
+
+
+/*
+ *       This is called single threaded during boot, so no need
+ *       to take the rtnl semaphore.
+ */
+static int __init net_dev_init(void)
+{
+	struct net_device *dev, **dp;
+	int i;
+
+	BUG_ON(!dev_boot_phase);
+
+#ifdef CONFIG_NET_DIVERT
+	dv_init();
+#endif /* CONFIG_NET_DIVERT */
+
+	/*
+	 *	Initialise the packet receive queues.
+	 */
+
+	for (i = 0; i < NR_CPUS; i++) {
+		struct softnet_data *queue;
+
+		queue = &softnet_data[i];
+		skb_queue_head_init(&queue->input_pkt_queue);
+		queue->throttle = 0;
+		queue->cng_level = 0;
+		queue->avg_blog = 10; /* arbitrary non-zero */
+		queue->completion_queue = NULL;
+		INIT_LIST_HEAD(&queue->poll_list);
+		set_bit(__LINK_STATE_START, &queue->backlog_dev.state);
+		queue->backlog_dev.weight = weight_p;
+		queue->backlog_dev.poll = process_backlog;
+		atomic_set(&queue->backlog_dev.refcnt, 1);
+	}
+
+#ifdef CONFIG_NET_PROFILE
+	net_profile_init();
+	NET_PROFILE_REGISTER(dev_queue_xmit);
+	NET_PROFILE_REGISTER(softnet_process);
+#endif
+
+#ifdef OFFLINE_SAMPLE
+	samp_timer.expires = jiffies + (10 * HZ);
+	add_timer(&samp_timer);
+#endif
+
+	/*
+	 *	Add the devices.
+	 *	If the call to dev->init fails, the dev is removed
+	 *	from the chain disconnecting the device until the
+	 *	next reboot.
+	 *
+	 *	NB At boot phase networking is dead. No locking is required.
+	 *	But we still preserve dev_base_lock for sanity.
+	 */
+
+	dp = &dev_base;
+	while ((dev = *dp) != NULL) {
+		spin_lock_init(&dev->queue_lock);
+		spin_lock_init(&dev->xmit_lock);
+#ifdef CONFIG_NET_FASTROUTE
+		dev->fastpath_lock = RW_LOCK_UNLOCKED;
+#endif
+		dev->xmit_lock_owner = -1;
+		dev->iflink = -1;
+		dev_hold(dev);
+
+		/*
+		 * Allocate name. If the init() fails
+		 * the name will be reissued correctly.
+		 */
+		if (strchr(dev->name, '%'))
+			dev_alloc_name(dev, dev->name);
+
+		/*
+		 * Check boot time settings for the device.
+		 */
+		netdev_boot_setup_check(dev);
+
+		if (dev->init && dev->init(dev)) {
+			/*
+			 * It failed to come up. It will be unhooked later.
+			 * dev_alloc_name can now advance to next suitable
+			 * name that is checked next.
+			 */
+			dev->deadbeaf = 1;
+			dp = &dev->next;
+		} else {
+			dp = &dev->next;
+			dev->ifindex = dev_new_index();
+			if (dev->iflink == -1)
+				dev->iflink = dev->ifindex;
+			if (!dev->rebuild_header)
+				dev->rebuild_header = default_rebuild_header;
+			dev_init_scheduler(dev);
+			set_bit(__LINK_STATE_PRESENT, &dev->state);
+		}
+	}
+
+	/*
+	 * Unhook devices that failed to come up
+	 */
+	dp = &dev_base;
+	while ((dev = *dp) != NULL) {
+		if (dev->deadbeaf) {
+			write_lock_bh(&dev_base_lock);
+			*dp = dev->next;
+			write_unlock_bh(&dev_base_lock);
+			dev_put(dev);
+		} else {
+			dp = &dev->next;
+		}
+	}
+
+#ifdef CONFIG_PROC_FS
+	proc_net_create("dev", 0, dev_get_info);
+	create_proc_read_entry("net/softnet_stat", 0, 0, dev_proc_stats, NULL);
+#ifdef WIRELESS_EXT
+	/* Available in net/core/wireless.c */
+	proc_net_create("wireless", 0, dev_get_wireless_info);
+#endif	/* WIRELESS_EXT */
+#endif	/* CONFIG_PROC_FS */
+
+	dev_boot_phase = 0;
+
+	open_softirq(NET_TX_SOFTIRQ, net_tx_action, NULL);
+	open_softirq(NET_RX_SOFTIRQ, net_rx_action, NULL);
+
+	dst_init();
+	dev_mcast_init();
+
+#ifdef CONFIG_NET_SCHED
+	pktsched_init();
+#endif
+	/*
+	 *	Initialise network devices
+	 */
+
+	net_device_init();
+
+	return 0;
+}
+
+subsys_initcall(net_dev_init);
+
+#ifdef CONFIG_HOTPLUG
+
+/* Notify userspace when a netdevice event occurs,
+ * by running '/sbin/hotplug net' with certain
+ * environment variables set.
+ */
+
+static int net_run_sbin_hotplug(struct net_device *dev, char *action)
+{
+	char *argv[3], *envp[5], ifname[12 + IFNAMSIZ], action_str[32];
+	int i;
+
+	sprintf(ifname, "INTERFACE=%s", dev->name);
+	sprintf(action_str, "ACTION=%s", action);
+
+        i = 0;
+        argv[i++] = hotplug_path;
+        argv[i++] = "net";
+        argv[i] = 0;
+
+	i = 0;
+	/* minimal command environment */
+	envp [i++] = "HOME=/";
+	envp [i++] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin";
+	envp [i++] = ifname;
+	envp [i++] = action_str;
+	envp [i] = 0;
+
+	return call_usermodehelper(argv [0], argv, envp);
+}
+#endif