wext: refactor

Refactor wext to
 * split out iwpriv handling
 * split out iwspy handling
 * split out procfs support
 * allow cfg80211 to have wireless extensions compat code
   w/o CONFIG_WIRELESS_EXT

After this, drivers need to
 - select WIRELESS_EXT	- for wext support
 - select WEXT_PRIV	- for iwpriv support
 - select WEXT_SPY	- for iwspy support

except cfg80211 -- which gets new hooks in wext-core.c
and can then get wext handlers without CONFIG_WIRELESS_EXT.

Wireless extensions procfs support is auto-selected
based on PROC_FS and anything that requires the wext core
(i.e. WIRELESS_EXT or CFG80211_WEXT).

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

12 files changed, 1072 insertions, 1124 deletions

diff --git a/net/wireless/Kconfig b/net/wireless/Kconfig
index abf7ca3f9ff..614bdcec1c8 100644
--- a/net/wireless/Kconfig
+++ b/net/wireless/Kconfig
@@ -1,3 +1,21 @@
+config WIRELESS_EXT
+	bool
+
+config WEXT_CORE
+	def_bool y
+	depends on CFG80211_WEXT || WIRELESS_EXT
+
+config WEXT_PROC
+	def_bool y
+	depends on PROC_FS
+	depends on WEXT_CORE
+
+config WEXT_SPY
+	bool
+
+config WEXT_PRIV
+	bool
+
 config CFG80211
 	tristate "cfg80211 - wireless configuration API"
 	depends on RFKILL || !RFKILL
@@ -56,6 +74,12 @@ config CFG80211_REG_DEBUG
 
 	  If unsure, say N.
 
+config CFG80211_DEFAULT_PS_VALUE
+	int
+	default 1 if CFG80211_DEFAULT_PS
+	default 0
+	depends on CFG80211
+
 config CFG80211_DEFAULT_PS
 	bool "enable powersave by default"
 	depends on CFG80211
@@ -67,14 +91,10 @@ config CFG80211_DEFAULT_PS
 	  applications instead -- they need to register their network
 	  latency requirement, see Documentation/power/pm_qos_interface.txt.
 
-config CFG80211_DEFAULT_PS_VALUE
-	int
-	default 1 if CFG80211_DEFAULT_PS
-	default 0
-
 config CFG80211_DEBUGFS
 	bool "cfg80211 DebugFS entries"
-	depends on CFG80211 && DEBUG_FS
+	depends on CFG80211
+	depends on DEBUG_FS
 	---help---
 	  You can enable this if you want to debugfs entries for cfg80211.
 
@@ -83,6 +103,7 @@ config CFG80211_DEBUGFS
 config WIRELESS_OLD_REGULATORY
 	bool "Old wireless static regulatory definitions"
 	default n
+	depends on CFG80211
 	---help---
 	  This option enables the old static regulatory information
 	  and uses it within the new framework. This option is available
@@ -94,20 +115,19 @@ config WIRELESS_OLD_REGULATORY
 
 	  Say N and if you say Y, please tell us why. The default is N.
 
-config WIRELESS_EXT
-	bool "Wireless extensions"
+config CFG80211_WEXT
+	bool "cfg80211 wireless extensions compatibility"
+	depends on CFG80211
+	select WEXT_CORE
 	default y
-	---help---
-	  This option enables the legacy wireless extensions
-	  (wireless network interface configuration via ioctls.)
-
-	  Say Y unless you've upgraded all your userspace to use
-	  nl80211 instead of wireless extensions.
+	help
+	  Enable this option if you need old userspace for wireless
+	  extensions with cfg80211-based drivers.
 
 config WIRELESS_EXT_SYSFS
 	bool "Wireless extensions sysfs files"
 	default y
-	depends on WIRELESS_EXT && SYSFS
+	depends on WEXT_CORE && SYSFS
 	help
 	  This option enables the deprecated wireless statistics
 	  files in /sys/class/net/*/wireless/. The same information
diff --git a/net/wireless/Makefile b/net/wireless/Makefile
index 3ecaa917997..c8141505a83 100644
--- a/net/wireless/Makefile
+++ b/net/wireless/Makefile
@@ -1,13 +1,17 @@
-obj-$(CONFIG_WIRELESS_EXT) += wext.o
 obj-$(CONFIG_CFG80211) += cfg80211.o
 obj-$(CONFIG_LIB80211) += lib80211.o
 obj-$(CONFIG_LIB80211_CRYPT_WEP) += lib80211_crypt_wep.o
 obj-$(CONFIG_LIB80211_CRYPT_CCMP) += lib80211_crypt_ccmp.o
 obj-$(CONFIG_LIB80211_CRYPT_TKIP) += lib80211_crypt_tkip.o
 
+obj-$(CONFIG_WEXT_CORE) += wext-core.o
+obj-$(CONFIG_WEXT_PROC) += wext-proc.o
+obj-$(CONFIG_WEXT_SPY) += wext-spy.o
+obj-$(CONFIG_WEXT_PRIV) += wext-priv.o
+
 cfg80211-y += core.o sysfs.o radiotap.o util.o reg.o scan.o nl80211.o
 cfg80211-y += mlme.o ibss.o sme.o chan.o
 cfg80211-$(CONFIG_CFG80211_DEBUGFS) += debugfs.o
-cfg80211-$(CONFIG_WIRELESS_EXT) += wext-compat.o wext-sme.o
+cfg80211-$(CONFIG_CFG80211_WEXT) += wext-compat.o wext-sme.o
 
 ccflags-y += -D__CHECK_ENDIAN__
diff --git a/net/wireless/core.c b/net/wireless/core.c
index e6f02e98e5f..eb0bb24b99c 100644
--- a/net/wireless/core.c
+++ b/net/wireless/core.c
@@ -358,6 +358,10 @@ struct wiphy *wiphy_new(const struct cfg80211_ops *ops, int sizeof_priv)
 	INIT_LIST_HEAD(&rdev->bss_list);
 	INIT_WORK(&rdev->scan_done_wk, __cfg80211_scan_done);
 
+#ifdef CONFIG_CFG80211_WEXT
+	rdev->wiphy.wext = &cfg80211_wext_handler;
+#endif
+
 	device_initialize(&rdev->wiphy.dev);
 	rdev->wiphy.dev.class = &ieee80211_class;
 	rdev->wiphy.dev.platform_data = rdev;
@@ -672,9 +676,7 @@ static int cfg80211_netdev_notifier_call(struct notifier_block * nb,
 		wdev->netdev = dev;
 		wdev->sme_state = CFG80211_SME_IDLE;
 		mutex_unlock(&rdev->devlist_mtx);
-#ifdef CONFIG_WIRELESS_EXT
-		if (!dev->wireless_handlers)
-			dev->wireless_handlers = &cfg80211_wext_handler;
+#ifdef CONFIG_CFG80211_WEXT
 		wdev->wext.default_key = -1;
 		wdev->wext.default_mgmt_key = -1;
 		wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
@@ -696,7 +698,7 @@ static int cfg80211_netdev_notifier_call(struct notifier_block * nb,
 			break;
 		case NL80211_IFTYPE_STATION:
 			wdev_lock(wdev);
-#ifdef CONFIG_WIRELESS_EXT
+#ifdef CONFIG_CFG80211_WEXT
 			kfree(wdev->wext.ie);
 			wdev->wext.ie = NULL;
 			wdev->wext.ie_len = 0;
@@ -728,7 +730,7 @@ static int cfg80211_netdev_notifier_call(struct notifier_block * nb,
 			mutex_unlock(&rdev->devlist_mtx);
 			dev_put(dev);
 		}
-#ifdef CONFIG_WIRELESS_EXT
+#ifdef CONFIG_CFG80211_WEXT
 		cfg80211_lock_rdev(rdev);
 		mutex_lock(&rdev->devlist_mtx);
 		wdev_lock(wdev);
@@ -766,7 +768,7 @@ static int cfg80211_netdev_notifier_call(struct notifier_block * nb,
 			sysfs_remove_link(&dev->dev.kobj, "phy80211");
 			list_del_init(&wdev->list);
 			rdev->devlist_generation++;
-#ifdef CONFIG_WIRELESS_EXT
+#ifdef CONFIG_CFG80211_WEXT
 			kfree(wdev->wext.keys);
 #endif
 		}
diff --git a/net/wireless/ibss.c b/net/wireless/ibss.c
index c8833891197..39b6d92e282 100644
--- a/net/wireless/ibss.c
+++ b/net/wireless/ibss.c
@@ -15,7 +15,7 @@ void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid)
 {
 	struct wireless_dev *wdev = dev->ieee80211_ptr;
 	struct cfg80211_bss *bss;
-#ifdef CONFIG_WIRELESS_EXT
+#ifdef CONFIG_CFG80211_WEXT
 	union iwreq_data wrqu;
 #endif
 
@@ -44,7 +44,7 @@ void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid)
 
 	nl80211_send_ibss_bssid(wiphy_to_dev(wdev->wiphy), dev, bssid,
 				GFP_KERNEL);
-#ifdef CONFIG_WIRELESS_EXT
+#ifdef CONFIG_CFG80211_WEXT
 	memset(&wrqu, 0, sizeof(wrqu));
 	memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
 	wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
@@ -96,7 +96,7 @@ int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
 		kfree(wdev->connect_keys);
 	wdev->connect_keys = connkeys;
 
-#ifdef CONFIG_WIRELESS_EXT
+#ifdef CONFIG_CFG80211_WEXT
 	wdev->wext.ibss.channel = params->channel;
 #endif
 	err = rdev->ops->join_ibss(&rdev->wiphy, dev, params);
@@ -154,7 +154,7 @@ static void __cfg80211_clear_ibss(struct net_device *dev, bool nowext)
 
 	wdev->current_bss = NULL;
 	wdev->ssid_len = 0;
-#ifdef CONFIG_WIRELESS_EXT
+#ifdef CONFIG_CFG80211_WEXT
 	if (!nowext)
 		wdev->wext.ibss.ssid_len = 0;
 #endif
@@ -203,7 +203,7 @@ int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
 	return err;
 }
 
-#ifdef CONFIG_WIRELESS_EXT
+#ifdef CONFIG_CFG80211_WEXT
 int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
 			    struct wireless_dev *wdev)
 {
diff --git a/net/wireless/mlme.c b/net/wireless/mlme.c
index 79d2eec54ce..ceb2c14c8f4 100644
--- a/net/wireless/mlme.c
+++ b/net/wireless/mlme.c
@@ -331,7 +331,7 @@ void cfg80211_michael_mic_failure(struct net_device *dev, const u8 *addr,
 {
 	struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
 	struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
-#ifdef CONFIG_WIRELESS_EXT
+#ifdef CONFIG_CFG80211_WEXT
 	union iwreq_data wrqu;
 	char *buf = kmalloc(128, gfp);
 
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index e0ecc9f153d..14004e2ebd6 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -1264,7 +1264,7 @@ static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
 	if (!err)
 		err = func(&rdev->wiphy, dev, key.idx);
 
-#ifdef CONFIG_WIRELESS_EXT
+#ifdef CONFIG_CFG80211_WEXT
 	if (!err) {
 		if (func == rdev->ops->set_default_key)
 			dev->ieee80211_ptr->wext.default_key = key.idx;
@@ -1365,7 +1365,7 @@ static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
 	if (!err)
 		err = rdev->ops->del_key(&rdev->wiphy, dev, key.idx, mac_addr);
 
-#ifdef CONFIG_WIRELESS_EXT
+#ifdef CONFIG_CFG80211_WEXT
 	if (!err) {
 		if (key.idx == dev->ieee80211_ptr->wext.default_key)
 			dev->ieee80211_ptr->wext.default_key = -1;
diff --git a/net/wireless/scan.c b/net/wireless/scan.c
index e5f92ee758f..2e8c515f3c5 100644
--- a/net/wireless/scan.c
+++ b/net/wireless/scan.c
@@ -22,7 +22,7 @@ void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, bool leak)
 {
 	struct cfg80211_scan_request *request;
 	struct net_device *dev;
-#ifdef CONFIG_WIRELESS_EXT
+#ifdef CONFIG_CFG80211_WEXT
 	union iwreq_data wrqu;
 #endif
 
@@ -47,7 +47,7 @@ void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, bool leak)
 	else
 		nl80211_send_scan_done(rdev, dev);
 
-#ifdef CONFIG_WIRELESS_EXT
+#ifdef CONFIG_CFG80211_WEXT
 	if (!request->aborted) {
 		memset(&wrqu, 0, sizeof(wrqu));
 
@@ -592,7 +592,7 @@ void cfg80211_unlink_bss(struct wiphy *wiphy, struct cfg80211_bss *pub)
 }
 EXPORT_SYMBOL(cfg80211_unlink_bss);
 
-#ifdef CONFIG_WIRELESS_EXT
+#ifdef CONFIG_CFG80211_WEXT
 int cfg80211_wext_siwscan(struct net_device *dev,
 			  struct iw_request_info *info,
 			  union iwreq_data *wrqu, char *extra)
diff --git a/net/wireless/sme.c b/net/wireless/sme.c
index 93c3ed32920..d3624152f7f 100644
--- a/net/wireless/sme.c
+++ b/net/wireless/sme.c
@@ -345,7 +345,7 @@ void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
 {
 	struct wireless_dev *wdev = dev->ieee80211_ptr;
 	u8 *country_ie;
-#ifdef CONFIG_WIRELESS_EXT
+#ifdef CONFIG_CFG80211_WEXT
 	union iwreq_data wrqu;
 #endif
 
@@ -362,7 +362,7 @@ void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
 				    resp_ie, resp_ie_len,
 				    status, GFP_KERNEL);
 
-#ifdef CONFIG_WIRELESS_EXT
+#ifdef CONFIG_CFG80211_WEXT
 	if (wextev) {
 		if (req_ie && status == WLAN_STATUS_SUCCESS) {
 			memset(&wrqu, 0, sizeof(wrqu));
@@ -477,7 +477,7 @@ void __cfg80211_roamed(struct wireless_dev *wdev, const u8 *bssid,
 		       const u8 *resp_ie, size_t resp_ie_len)
 {
 	struct cfg80211_bss *bss;
-#ifdef CONFIG_WIRELESS_EXT
+#ifdef CONFIG_CFG80211_WEXT
 	union iwreq_data wrqu;
 #endif
 
@@ -512,7 +512,7 @@ void __cfg80211_roamed(struct wireless_dev *wdev, const u8 *bssid,
 			    req_ie, req_ie_len, resp_ie, resp_ie_len,
 			    GFP_KERNEL);
 
-#ifdef CONFIG_WIRELESS_EXT
+#ifdef CONFIG_CFG80211_WEXT
 	if (req_ie) {
 		memset(&wrqu, 0, sizeof(wrqu));
 		wrqu.data.length = req_ie_len;
@@ -573,7 +573,7 @@ void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
 	struct wireless_dev *wdev = dev->ieee80211_ptr;
 	struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 	int i;
-#ifdef CONFIG_WIRELESS_EXT
+#ifdef CONFIG_CFG80211_WEXT
 	union iwreq_data wrqu;
 #endif
 
@@ -631,7 +631,7 @@ void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
 		for (i = 0; i < 6; i++)
 			rdev->ops->del_key(wdev->wiphy, dev, i, NULL);
 
-#ifdef CONFIG_WIRELESS_EXT
+#ifdef CONFIG_CFG80211_WEXT
 	memset(&wrqu, 0, sizeof(wrqu));
 	wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 	wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
diff --git a/net/wireless/wext.c b/net/wireless/wext-core.c
index 60fe57761ca..a4e5ddc8d4f 100644
--- a/net/wireless/wext.c
+++ b/net/wireless/wext-core.c
@@ -1,112 +1,28 @@
 /*
- * This file implement the Wireless Extensions APIs.
+ * This file implement the Wireless Extensions core API.
  *
  * Authors :	Jean Tourrilhes - HPL - <jt@hpl.hp.com>
  * Copyright (c) 1997-2007 Jean Tourrilhes, All Rights Reserved.
+ * Copyright	2009 Johannes Berg <johannes@sipsolutions.net>
  *
  * (As all part of the Linux kernel, this file is GPL)
  */
-
-/************************** DOCUMENTATION **************************/
-/*
- * API definition :
- * --------------
- * See <linux/wireless.h> for details of the APIs and the rest.
- *
- * History :
- * -------
- *
- * v1 - 5.12.01 - Jean II
- *	o Created this file.
- *
- * v2 - 13.12.01 - Jean II
- *	o Move /proc/net/wireless stuff from net/core/dev.c to here
- *	o Make Wireless Extension IOCTLs go through here
- *	o Added iw_handler handling ;-)
- *	o Added standard ioctl description
- *	o Initial dumb commit strategy based on orinoco.c
- *
- * v3 - 19.12.01 - Jean II
- *	o Make sure we don't go out of standard_ioctl[] in ioctl_standard_call
- *	o Add event dispatcher function
- *	o Add event description
- *	o Propagate events as rtnetlink IFLA_WIRELESS option
- *	o Generate event on selected SET requests
- *
- * v4 - 18.04.02 - Jean II
- *	o Fix stupid off by one in iw_ioctl_description : IW_ESSID_MAX_SIZE + 1
- *
- * v5 - 21.06.02 - Jean II
- *	o Add IW_PRIV_TYPE_ADDR in priv_type_size (+cleanup)
- *	o Reshuffle IW_HEADER_TYPE_XXX to map IW_PRIV_TYPE_XXX changes
- *	o Add IWEVCUSTOM for driver specific event/scanning token
- *	o Turn on WE_STRICT_WRITE by default + kernel warning
- *	o Fix WE_STRICT_WRITE in ioctl_export_private() (32 => iw_num)
- *	o Fix off-by-one in test (extra_size <= IFNAMSIZ)
- *
- * v6 - 9.01.03 - Jean II
- *	o Add common spy support : iw_handler_set_spy(), wireless_spy_update()
- *	o Add enhanced spy support : iw_handler_set_thrspy() and event.
- *	o Add WIRELESS_EXT version display in /proc/net/wireless
- *
- * v6 - 18.06.04 - Jean II
- *	o Change get_spydata() method for added safety
- *	o Remove spy #ifdef, they are always on -> cleaner code
- *	o Allow any size GET request if user specifies length > max
- *		and if request has IW_DESCR_FLAG_NOMAX flag or is SIOCGIWPRIV
- *	o Start migrating get_wireless_stats to struct iw_handler_def
- *	o Add wmb() in iw_handler_set_spy() for non-coherent archs/cpus
- * Based on patch from Pavel Roskin <proski@gnu.org> :
- *	o Fix kernel data leak to user space in private handler handling
- *
- * v7 - 18.3.05 - Jean II
- *	o Remove (struct iw_point *)->pointer from events and streams
- *	o Remove spy_offset from struct iw_handler_def
- *	o Start deprecating dev->get_wireless_stats, output a warning
- *	o If IW_QUAL_DBM is set, show dBm values in /proc/net/wireless
- *	o Don't lose INVALID/DBM flags when clearing UPDATED flags (iwstats)
- *
- * v8 - 17.02.06 - Jean II
- *	o RtNetlink requests support (SET/GET)
- *
- * v8b - 03.08.06 - Herbert Xu
- *	o Fix Wireless Event locking issues.
- *
- * v9 - 14.3.06 - Jean II
- *	o Change length in ESSID and NICK to strlen() instead of strlen()+1
- *	o Make standard_ioctl_num and standard_event_num unsigned
- *	o Remove (struct net_device *)->get_wireless_stats()
- *
- * v10 - 16.3.07 - Jean II
- *	o Prevent leaking of kernel space in stream on 64 bits.
- */
-
-/***************************** INCLUDES *****************************/
-
-#include <linux/module.h>
-#include <linux/types.h>		/* off_t */
-#include <linux/netdevice.h>		/* struct ifreq, dev_get_by_name() */
-#include <linux/proc_fs.h>
-#include <linux/rtnetlink.h>		/* rtnetlink stuff */
-#include <linux/seq_file.h>
-#include <linux/init.h>			/* for __init */
-#include <linux/if_arp.h>		/* ARPHRD_ETHER */
-#include <linux/etherdevice.h>		/* compare_ether_addr */
-#include <linux/interrupt.h>
-#include <net/net_namespace.h>
-
-#include <linux/wireless.h>		/* Pretty obvious */
-#include <net/iw_handler.h>		/* New driver API */
+#include <linux/kernel.h>
+#include <linux/netdevice.h>
+#include <linux/rtnetlink.h>
+#include <linux/wireless.h>
+#include <linux/uaccess.h>
+#include <net/cfg80211.h>
+#include <net/iw_handler.h>
 #include <net/netlink.h>
 #include <net/wext.h>
+#include <net/net_namespace.h>
+
+typedef int (*wext_ioctl_func)(struct net_device *, struct iwreq *,
+			       unsigned int, struct iw_request_info *,
+			       iw_handler);
 
-#include <asm/uaccess.h>		/* copy_to_user() */
 
-/************************* GLOBAL VARIABLES *************************/
-/*
- * You should not use global variables, because of re-entrancy.
- * On our case, it's only const, so it's OK...
- */
 /*
  * Meta-data about all the standard Wireless Extension request we
  * know about.
@@ -390,18 +306,6 @@ static const struct iw_ioctl_description standard_event[] = {
 };
 static const unsigned standard_event_num = ARRAY_SIZE(standard_event);
 
-/* Size (in bytes) of the various private data types */
-static const char iw_priv_type_size[] = {
-	0,				/* IW_PRIV_TYPE_NONE */
-	1,				/* IW_PRIV_TYPE_BYTE */
-	1,				/* IW_PRIV_TYPE_CHAR */
-	0,				/* Not defined */
-	sizeof(__u32),			/* IW_PRIV_TYPE_INT */
-	sizeof(struct iw_freq),		/* IW_PRIV_TYPE_FLOAT */
-	sizeof(struct sockaddr),	/* IW_PRIV_TYPE_ADDR */
-	0,				/* Not defined */
-};
-
 /* Size (in bytes) of various events */
 static const int event_type_size[] = {
 	IW_EV_LCP_LEN,			/* IW_HEADER_TYPE_NULL */
@@ -433,323 +337,346 @@ static const int compat_event_type_size[] = {
 };
 #endif
 
-/************************ COMMON SUBROUTINES ************************/
-/*
- * Stuff that may be used in various place or doesn't fit in one
- * of the section below.
- */
-
-/* ---------------------------------------------------------------- */
-/*
- * Return the driver handler associated with a specific Wireless Extension.
- */
-static iw_handler get_handler(struct net_device *dev, unsigned int cmd)
-{
-	/* Don't "optimise" the following variable, it will crash */
-	unsigned int	index;		/* *MUST* be unsigned */
 
-	/* Check if we have some wireless handlers defined */
-	if (dev->wireless_handlers == NULL)
-		return NULL;
-
-	/* Try as a standard command */
-	index = cmd - SIOCIWFIRST;
-	if (index < dev->wireless_handlers->num_standard)
-		return dev->wireless_handlers->standard[index];
-
-	/* Try as a private command */
-	index = cmd - SIOCIWFIRSTPRIV;
-	if (index < dev->wireless_handlers->num_private)
-		return dev->wireless_handlers->private[index];
+/* IW event code */
 
-	/* Not found */
-	return NULL;
-}
-
-/* ---------------------------------------------------------------- */
-/*
- * Get statistics out of the driver
- */
-struct iw_statistics *get_wireless_stats(struct net_device *dev)
+static int __net_init wext_pernet_init(struct net *net)
 {
-	/* New location */
-	if ((dev->wireless_handlers != NULL) &&
-	   (dev->wireless_handlers->get_wireless_stats != NULL))
-		return dev->wireless_handlers->get_wireless_stats(dev);
-
-	/* Not found */
-	return NULL;
+	skb_queue_head_init(&net->wext_nlevents);
+	return 0;
 }
 
-/* ---------------------------------------------------------------- */
-/*
- * Call the commit handler in the driver
- * (if exist and if conditions are right)
- *
- * Note : our current commit strategy is currently pretty dumb,
- * but we will be able to improve on that...
- * The goal is to try to agreagate as many changes as possible
- * before doing the commit. Drivers that will define a commit handler
- * are usually those that need a reset after changing parameters, so
- * we want to minimise the number of reset.
- * A cool idea is to use a timer : at each "set" command, we re-set the
- * timer, when the timer eventually fires, we call the driver.
- * Hopefully, more on that later.
- *
- * Also, I'm waiting to see how many people will complain about the
- * netif_running(dev) test. I'm open on that one...
- * Hopefully, the driver will remember to do a commit in "open()" ;-)
- */
-static int call_commit_handler(struct net_device *dev)
+static void __net_exit wext_pernet_exit(struct net *net)
 {
-	if ((netif_running(dev)) &&
-	   (dev->wireless_handlers->standard[0] != NULL))
-		/* Call the commit handler on the driver */
-		return dev->wireless_handlers->standard[0](dev, NULL,
-							   NULL, NULL);
-	else
-		return 0;		/* Command completed successfully */
+	skb_queue_purge(&net->wext_nlevents);
 }
 
-/* ---------------------------------------------------------------- */
-/*
- * Calculate size of private arguments
- */
-static int get_priv_size(__u16 args)
-{
-	int	num = args & IW_PRIV_SIZE_MASK;
-	int	type = (args & IW_PRIV_TYPE_MASK) >> 12;
+static struct pernet_operations wext_pernet_ops = {
+	.init = wext_pernet_init,
+	.exit = wext_pernet_exit,
+};
 
-	return num * iw_priv_type_size[type];
+static int __init wireless_nlevent_init(void)
+{
+	return register_pernet_subsys(&wext_pernet_ops);
 }
 
-/* ---------------------------------------------------------------- */
-/*
- * Re-calculate the size of private arguments
- */
-static int adjust_priv_size(__u16 args, struct iw_point *iwp)
+subsys_initcall(wireless_nlevent_init);
+
+/* Process events generated by the wireless layer or the driver. */
+static void wireless_nlevent_process(struct work_struct *work)
 {
-	int	num = iwp->length;
-	int	max = args & IW_PRIV_SIZE_MASK;
-	int	type = (args & IW_PRIV_TYPE_MASK) >> 12;
+	struct sk_buff *skb;
+	struct net *net;
 
-	/* Make sure the driver doesn't goof up */
-	if (max < num)
-		num = max;
+	rtnl_lock();
+
+	for_each_net(net) {
+		while ((skb = skb_dequeue(&net->wext_nlevents)))
+			rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL,
+				    GFP_KERNEL);
+	}
 
-	return num * iw_priv_type_size[type];
+	rtnl_unlock();
 }
 
-/* ---------------------------------------------------------------- */
-/*
- * Standard Wireless Handler : get wireless stats
- *	Allow programatic access to /proc/net/wireless even if /proc
- *	doesn't exist... Also more efficient...
- */
-static int iw_handler_get_iwstats(struct net_device *		dev,
-				  struct iw_request_info *	info,
-				  union iwreq_data *		wrqu,
-				  char *			extra)
+static DECLARE_WORK(wireless_nlevent_work, wireless_nlevent_process);
+
+static struct nlmsghdr *rtnetlink_ifinfo_prep(struct net_device *dev,
+					      struct sk_buff *skb)
 {
-	/* Get stats from the driver */
-	struct iw_statistics *stats;
+	struct ifinfomsg *r;
+	struct nlmsghdr  *nlh;
 
-	stats = get_wireless_stats(dev);
-	if (stats) {
-		/* Copy statistics to extra */
-		memcpy(extra, stats, sizeof(struct iw_statistics));
-		wrqu->data.length = sizeof(struct iw_statistics);
+	nlh = nlmsg_put(skb, 0, 0, RTM_NEWLINK, sizeof(*r), 0);
+	if (!nlh)
+		return NULL;
 
-		/* Check if we need to clear the updated flag */
-		if (wrqu->data.flags != 0)
-			stats->qual.updated &= ~IW_QUAL_ALL_UPDATED;
-		return 0;
-	} else
-		return -EOPNOTSUPP;
+	r = nlmsg_data(nlh);
+	r->ifi_family = AF_UNSPEC;
+	r->__ifi_pad = 0;
+	r->ifi_type = dev->type;
+	r->ifi_index = dev->ifindex;
+	r->ifi_flags = dev_get_flags(dev);
+	r->ifi_change = 0;	/* Wireless changes don't affect those flags */
+
+	NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name);
+
+	return nlh;
+ nla_put_failure:
+	nlmsg_cancel(skb, nlh);
+	return NULL;
 }
 
-/* ---------------------------------------------------------------- */
+
 /*
- * Standard Wireless Handler : get iwpriv definitions
- * Export the driver private handler definition
- * They will be picked up by tools like iwpriv...
+ * Main event dispatcher. Called from other parts and drivers.
+ * Send the event on the appropriate channels.
+ * May be called from interrupt context.
  */
-static int iw_handler_get_private(struct net_device *		dev,
-				  struct iw_request_info *	info,
-				  union iwreq_data *		wrqu,
-				  char *			extra)
+void wireless_send_event(struct net_device *	dev,
+			 unsigned int		cmd,
+			 union iwreq_data *	wrqu,
+			 const char *		extra)
 {
-	/* Check if the driver has something to export */
-	if ((dev->wireless_handlers->num_private_args == 0) ||
-	   (dev->wireless_handlers->private_args == NULL))
-		return -EOPNOTSUPP;
+	const struct iw_ioctl_description *	descr = NULL;
+	int extra_len = 0;
+	struct iw_event  *event;		/* Mallocated whole event */
+	int event_len;				/* Its size */
+	int hdr_len;				/* Size of the event header */
+	int wrqu_off = 0;			/* Offset in wrqu */
+	/* Don't "optimise" the following variable, it will crash */
+	unsigned	cmd_index;		/* *MUST* be unsigned */
+	struct sk_buff *skb;
+	struct nlmsghdr *nlh;
+	struct nlattr *nla;
+#ifdef CONFIG_COMPAT
+	struct __compat_iw_event *compat_event;
+	struct compat_iw_point compat_wrqu;
+	struct sk_buff *compskb;
+#endif
 
-	/* Check if there is enough buffer up there */
-	if (wrqu->data.length < dev->wireless_handlers->num_private_args) {
-		/* User space can't know in advance how large the buffer
-		 * needs to be. Give it a hint, so that we can support
-		 * any size buffer we want somewhat efficiently... */
-		wrqu->data.length = dev->wireless_handlers->num_private_args;
-		return -E2BIG;
+	/*
+	 * Nothing in the kernel sends scan events with data, be safe.
+	 * This is necessary because we cannot fix up scan event data
+	 * for compat, due to being contained in 'extra', but normally
+	 * applications are required to retrieve the scan data anyway
+	 * and no data is included in the event, this codifies that
+	 * practice.
+	 */
+	if (WARN_ON(cmd == SIOCGIWSCAN && extra))
+		extra = NULL;
+
+	/* Get the description of the Event */
+	if (cmd <= SIOCIWLAST) {
+		cmd_index = cmd - SIOCIWFIRST;
+		if (cmd_index < standard_ioctl_num)
+			descr = &(standard_ioctl[cmd_index]);
+	} else {
+		cmd_index = cmd - IWEVFIRST;
+		if (cmd_index < standard_event_num)
+			descr = &(standard_event[cmd_index]);
+	}
+	/* Don't accept unknown events */
+	if (descr == NULL) {
+		/* Note : we don't return an error to the driver, because
+		 * the driver would not know what to do about it. It can't
+		 * return an error to the user, because the event is not
+		 * initiated by a user request.
+		 * The best the driver could do is to log an error message.
+		 * We will do it ourselves instead...
+		 */
+		printk(KERN_ERR "%s (WE) : Invalid/Unknown Wireless Event (0x%04X)\n",
+		       dev->name, cmd);
+		return;
 	}
 
-	/* Set the number of available ioctls. */
-	wrqu->data.length = dev->wireless_handlers->num_private_args;
+	/* Check extra parameters and set extra_len */
+	if (descr->header_type == IW_HEADER_TYPE_POINT) {
+		/* Check if number of token fits within bounds */
+		if (wrqu->data.length > descr->max_tokens) {
+			printk(KERN_ERR "%s (WE) : Wireless Event too big (%d)\n", dev->name, wrqu->data.length);
+			return;
+		}
+		if (wrqu->data.length < descr->min_tokens) {
+			printk(KERN_ERR "%s (WE) : Wireless Event too small (%d)\n", dev->name, wrqu->data.length);
+			return;
+		}
+		/* Calculate extra_len - extra is NULL for restricted events */
+		if (extra != NULL)
+			extra_len = wrqu->data.length * descr->token_size;
+		/* Always at an offset in wrqu */
+		wrqu_off = IW_EV_POINT_OFF;
+	}
 
-	/* Copy structure to the user buffer. */
-	memcpy(extra, dev->wireless_handlers->private_args,
-	       sizeof(struct iw_priv_args) * wrqu->data.length);
+	/* Total length of the event */
+	hdr_len = event_type_size[descr->header_type];
+	event_len = hdr_len + extra_len;
 
-	return 0;
-}
+	/*
+	 * The problem for 64/32 bit.
+	 *
+	 * On 64-bit, a regular event is laid out as follows:
+	 *      |  0  |  1  |  2  |  3  |  4  |  5  |  6  |  7  |
+	 *      | event.len | event.cmd |     p a d d i n g     |
+	 *      | wrqu data ... (with the correct size)         |
+	 *
+	 * This padding exists because we manipulate event->u,
+	 * and 'event' is not packed.
+	 *
+	 * An iw_point event is laid out like this instead:
+	 *      |  0  |  1  |  2  |  3  |  4  |  5  |  6  |  7  |
+	 *      | event.len | event.cmd |     p a d d i n g     |
+	 *      | iwpnt.len | iwpnt.flg |     p a d d i n g     |
+	 *      | extra data  ...
+	 *
+	 * The second padding exists because struct iw_point is extended,
+	 * but this depends on the platform...
+	 *
+	 * On 32-bit, all the padding shouldn't be there.
+	 */
 
+	skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
+	if (!skb)
+		return;
 
-/******************** /proc/net/wireless SUPPORT ********************/
-/*
- * The /proc/net/wireless file is a human readable user-space interface
- * exporting various wireless specific statistics from the wireless devices.
- * This is the most popular part of the Wireless Extensions ;-)
- *
- * This interface is a pure clone of /proc/net/dev (in net/core/dev.c).
- * The content of the file is basically the content of "struct iw_statistics".
- */
+	/* Send via the RtNetlink event channel */
+	nlh = rtnetlink_ifinfo_prep(dev, skb);
+	if (WARN_ON(!nlh)) {
+		kfree_skb(skb);
+		return;
+	}
 
-#ifdef CONFIG_PROC_FS
+	/* Add the wireless events in the netlink packet */
+	nla = nla_reserve(skb, IFLA_WIRELESS, event_len);
+	if (!nla) {
+		kfree_skb(skb);
+		return;
+	}
+	event = nla_data(nla);
 
-/* ---------------------------------------------------------------- */
-/*
- * Print one entry (line) of /proc/net/wireless
- */
-static void wireless_seq_printf_stats(struct seq_file *seq,
-				      struct net_device *dev)
-{
-	/* Get stats from the driver */
-	struct iw_statistics *stats = get_wireless_stats(dev);
-	static struct iw_statistics nullstats = {};
+	/* Fill event - first clear to avoid data leaking */
+	memset(event, 0, hdr_len);
+	event->len = event_len;
+	event->cmd = cmd;
+	memcpy(&event->u, ((char *) wrqu) + wrqu_off, hdr_len - IW_EV_LCP_LEN);
+	if (extra_len)
+		memcpy(((char *) event) + hdr_len, extra, extra_len);
 
-	/* show device if it's wireless regardless of current stats */
-	if (!stats && dev->wireless_handlers)
-		stats = &nullstats;
+	nlmsg_end(skb, nlh);
+#ifdef CONFIG_COMPAT
+	hdr_len = compat_event_type_size[descr->header_type];
+	event_len = hdr_len + extra_len;
 
-	if (stats) {
-		seq_printf(seq, "%6s: %04x  %3d%c  %3d%c  %3d%c  %6d %6d %6d "
-				"%6d %6d   %6d\n",
-			   dev->name, stats->status, stats->qual.qual,
-			   stats->qual.updated & IW_QUAL_QUAL_UPDATED
-			   ? '.' : ' ',
-			   ((__s32) stats->qual.level) -
-			   ((stats->qual.updated & IW_QUAL_DBM) ? 0x100 : 0),
-			   stats->qual.updated & IW_QUAL_LEVEL_UPDATED
-			   ? '.' : ' ',
-			   ((__s32) stats->qual.noise) -
-			   ((stats->qual.updated & IW_QUAL_DBM) ? 0x100 : 0),
-			   stats->qual.updated & IW_QUAL_NOISE_UPDATED
-			   ? '.' : ' ',
-			   stats->discard.nwid, stats->discard.code,
-			   stats->discard.fragment, stats->discard.retries,
-			   stats->discard.misc, stats->miss.beacon);
-
-		if (stats != &nullstats)
-			stats->qual.updated &= ~IW_QUAL_ALL_UPDATED;
+	compskb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
+	if (!compskb) {
+		kfree_skb(skb);
+		return;
 	}
-}
 
-/* ---------------------------------------------------------------- */
-/*
- * Print info for /proc/net/wireless (print all entries)
- */
-static int wireless_dev_seq_show(struct seq_file *seq, void *v)
-{
-	might_sleep();
-
-	if (v == SEQ_START_TOKEN)
-		seq_printf(seq, "Inter-| sta-|   Quality        |   Discarded "
-				"packets               | Missed | WE\n"
-				" face | tus | link level noise |  nwid  "
-				"crypt   frag  retry   misc | beacon | %d\n",
-			   WIRELESS_EXT);
-	else
-		wireless_seq_printf_stats(seq, v);
-	return 0;
+	/* Send via the RtNetlink event channel */
+	nlh = rtnetlink_ifinfo_prep(dev, compskb);
+	if (WARN_ON(!nlh)) {
+		kfree_skb(skb);
+		kfree_skb(compskb);
+		return;
+	}
+
+	/* Add the wireless events in the netlink packet */
+	nla = nla_reserve(compskb, IFLA_WIRELESS, event_len);
+	if (!nla) {
+		kfree_skb(skb);
+		kfree_skb(compskb);
+		return;
+	}