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>

1 files changed, 0 insertions, 1775 deletions

diff --git a/net/wireless/wext.c b/net/wireless/wext.c
deleted file mode 100644
index 60fe57761ca9..000000000000
--- a/net/wireless/wext.c
+++ /dev/null
@@ -1,1775 +0,0 @@
-/*
- * This file implement the Wireless Extensions APIs.
- *
- * Authors :	Jean Tourrilhes - HPL - <jt@hpl.hp.com>
- * Copyright (c) 1997-2007 Jean Tourrilhes, All Rights Reserved.
- *
- * (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 <net/netlink.h>
-#include <net/wext.h>
-
-#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.
- */
-static const struct iw_ioctl_description standard_ioctl[] = {
-	[SIOCSIWCOMMIT	- SIOCIWFIRST] = {
-		.header_type	= IW_HEADER_TYPE_NULL,
-	},
-	[SIOCGIWNAME	- SIOCIWFIRST] = {
-		.header_type	= IW_HEADER_TYPE_CHAR,
-		.flags		= IW_DESCR_FLAG_DUMP,
-	},
-	[SIOCSIWNWID	- SIOCIWFIRST] = {
-		.header_type	= IW_HEADER_TYPE_PARAM,
-		.flags		= IW_DESCR_FLAG_EVENT,
-	},
-	[SIOCGIWNWID	- SIOCIWFIRST] = {
-		.header_type	= IW_HEADER_TYPE_PARAM,
-		.flags		= IW_DESCR_FLAG_DUMP,
-	},
-	[SIOCSIWFREQ	- SIOCIWFIRST] = {
-		.header_type	= IW_HEADER_TYPE_FREQ,
-		.flags		= IW_DESCR_FLAG_EVENT,
-	},
-	[SIOCGIWFREQ	- SIOCIWFIRST] = {
-		.header_type	= IW_HEADER_TYPE_FREQ,
-		.flags		= IW_DESCR_FLAG_DUMP,
-	},
-	[SIOCSIWMODE	- SIOCIWFIRST] = {
-		.header_type	= IW_HEADER_TYPE_UINT,
-		.flags		= IW_DESCR_FLAG_EVENT,
-	},
-	[SIOCGIWMODE	- SIOCIWFIRST] = {
-		.header_type	= IW_HEADER_TYPE_UINT,
-		.flags		= IW_DESCR_FLAG_DUMP,
-	},
-	[SIOCSIWSENS	- SIOCIWFIRST] = {
-		.header_type	= IW_HEADER_TYPE_PARAM,
-	},
-	[SIOCGIWSENS	- SIOCIWFIRST] = {
-		.header_type	= IW_HEADER_TYPE_PARAM,
-	},
-	[SIOCSIWRANGE	- SIOCIWFIRST] = {
-		.header_type	= IW_HEADER_TYPE_NULL,
-	},
-	[SIOCGIWRANGE	- SIOCIWFIRST] = {
-		.header_type	= IW_HEADER_TYPE_POINT,
-		.token_size	= 1,
-		.max_tokens	= sizeof(struct iw_range),
-		.flags		= IW_DESCR_FLAG_DUMP,
-	},
-	[SIOCSIWPRIV	- SIOCIWFIRST] = {
-		.header_type	= IW_HEADER_TYPE_NULL,
-	},
-	[SIOCGIWPRIV	- SIOCIWFIRST] = { /* (handled directly by us) */
-		.header_type	= IW_HEADER_TYPE_POINT,
-		.token_size	= sizeof(struct iw_priv_args),
-		.max_tokens	= 16,
-		.flags		= IW_DESCR_FLAG_NOMAX,
-	},
-	[SIOCSIWSTATS	- SIOCIWFIRST] = {
-		.header_type	= IW_HEADER_TYPE_NULL,
-	},
-	[SIOCGIWSTATS	- SIOCIWFIRST] = { /* (handled directly by us) */
-		.header_type	= IW_HEADER_TYPE_POINT,
-		.token_size	= 1,
-		.max_tokens	= sizeof(struct iw_statistics),
-		.flags		= IW_DESCR_FLAG_DUMP,
-	},
-	[SIOCSIWSPY	- SIOCIWFIRST] = {
-		.header_type	= IW_HEADER_TYPE_POINT,
-		.token_size	= sizeof(struct sockaddr),
-		.max_tokens	= IW_MAX_SPY,
-	},
-	[SIOCGIWSPY	- SIOCIWFIRST] = {
-		.header_type	= IW_HEADER_TYPE_POINT,
-		.token_size	= sizeof(struct sockaddr) +
-				  sizeof(struct iw_quality),
-		.max_tokens	= IW_MAX_SPY,
-	},
-	[SIOCSIWTHRSPY	- SIOCIWFIRST] = {
-		.header_type	= IW_HEADER_TYPE_POINT,
-		.token_size	= sizeof(struct iw_thrspy),
-		.min_tokens	= 1,
-		.max_tokens	= 1,
-	},
-	[SIOCGIWTHRSPY	- SIOCIWFIRST] = {
-		.header_type	= IW_HEADER_TYPE_POINT,
-		.token_size	= sizeof(struct iw_thrspy),
-		.min_tokens	= 1,
-		.max_tokens	= 1,
-	},
-	[SIOCSIWAP	- SIOCIWFIRST] = {
-		.header_type	= IW_HEADER_TYPE_ADDR,
-	},
-	[SIOCGIWAP	- SIOCIWFIRST] = {
-		.header_type	= IW_HEADER_TYPE_ADDR,
-		.flags		= IW_DESCR_FLAG_DUMP,
-	},
-	[SIOCSIWMLME	- SIOCIWFIRST] = {
-		.header_type	= IW_HEADER_TYPE_POINT,
-		.token_size	= 1,
-		.min_tokens	= sizeof(struct iw_mlme),
-		.max_tokens	= sizeof(struct iw_mlme),
-	},
-	[SIOCGIWAPLIST	- SIOCIWFIRST] = {
-		.header_type	= IW_HEADER_TYPE_POINT,
-		.token_size	= sizeof(struct sockaddr) +
-				  sizeof(struct iw_quality),
-		.max_tokens	= IW_MAX_AP,
-		.flags		= IW_DESCR_FLAG_NOMAX,
-	},
-	[SIOCSIWSCAN	- SIOCIWFIRST] = {
-		.header_type	= IW_HEADER_TYPE_POINT,
-		.token_size	= 1,
-		.min_tokens	= 0,
-		.max_tokens	= sizeof(struct iw_scan_req),
-	},
-	[SIOCGIWSCAN	- SIOCIWFIRST] = {
-		.header_type	= IW_HEADER_TYPE_POINT,
-		.token_size	= 1,
-		.max_tokens	= IW_SCAN_MAX_DATA,
-		.flags		= IW_DESCR_FLAG_NOMAX,
-	},
-	[SIOCSIWESSID	- SIOCIWFIRST] = {
-		.header_type	= IW_HEADER_TYPE_POINT,
-		.token_size	= 1,
-		.max_tokens	= IW_ESSID_MAX_SIZE,
-		.flags		= IW_DESCR_FLAG_EVENT,
-	},
-	[SIOCGIWESSID	- SIOCIWFIRST] = {
-		.header_type	= IW_HEADER_TYPE_POINT,
-		.token_size	= 1,
-		.max_tokens	= IW_ESSID_MAX_SIZE,
-		.flags		= IW_DESCR_FLAG_DUMP,
-	},
-	[SIOCSIWNICKN	- SIOCIWFIRST] = {
-		.header_type	= IW_HEADER_TYPE_POINT,
-		.token_size	= 1,
-		.max_tokens	= IW_ESSID_MAX_SIZE,
-	},
-	[SIOCGIWNICKN	- SIOCIWFIRST] = {
-		.header_type	= IW_HEADER_TYPE_POINT,
-		.token_size	= 1,
-		.max_tokens	= IW_ESSID_MAX_SIZE,
-	},
-	[SIOCSIWRATE	- SIOCIWFIRST] = {
-		.header_type	= IW_HEADER_TYPE_PARAM,
-	},
-	[SIOCGIWRATE	- SIOCIWFIRST] = {
-		.header_type	= IW_HEADER_TYPE_PARAM,
-	},
-	[SIOCSIWRTS	- SIOCIWFIRST] = {
-		.header_type	= IW_HEADER_TYPE_PARAM,
-	},
-	[SIOCGIWRTS	- SIOCIWFIRST] = {
-		.header_type	= IW_HEADER_TYPE_PARAM,
-	},
-	[SIOCSIWFRAG	- SIOCIWFIRST] = {
-		.header_type	= IW_HEADER_TYPE_PARAM,
-	},
-	[SIOCGIWFRAG	- SIOCIWFIRST] = {
-		.header_type	= IW_HEADER_TYPE_PARAM,
-	},
-	[SIOCSIWTXPOW	- SIOCIWFIRST] = {
-		.header_type	= IW_HEADER_TYPE_PARAM,
-	},
-	[SIOCGIWTXPOW	- SIOCIWFIRST] = {
-		.header_type	= IW_HEADER_TYPE_PARAM,
-	},
-	[SIOCSIWRETRY	- SIOCIWFIRST] = {
-		.header_type	= IW_HEADER_TYPE_PARAM,
-	},
-	[SIOCGIWRETRY	- SIOCIWFIRST] = {
-		.header_type	= IW_HEADER_TYPE_PARAM,
-	},
-	[SIOCSIWENCODE	- SIOCIWFIRST] = {
-		.header_type	= IW_HEADER_TYPE_POINT,
-		.token_size	= 1,
-		.max_tokens	= IW_ENCODING_TOKEN_MAX,
-		.flags		= IW_DESCR_FLAG_EVENT | IW_DESCR_FLAG_RESTRICT,
-	},
-	[SIOCGIWENCODE	- SIOCIWFIRST] = {
-		.header_type	= IW_HEADER_TYPE_POINT,
-		.token_size	= 1,
-		.max_tokens	= IW_ENCODING_TOKEN_MAX,
-		.flags		= IW_DESCR_FLAG_DUMP | IW_DESCR_FLAG_RESTRICT,
-	},
-	[SIOCSIWPOWER	- SIOCIWFIRST] = {
-		.header_type	= IW_HEADER_TYPE_PARAM,
-	},
-	[SIOCGIWPOWER	- SIOCIWFIRST] = {
-		.header_type	= IW_HEADER_TYPE_PARAM,
-	},
-	[SIOCSIWGENIE	- SIOCIWFIRST] = {
-		.header_type	= IW_HEADER_TYPE_POINT,
-		.token_size	= 1,
-		.max_tokens	= IW_GENERIC_IE_MAX,
-	},
-	[SIOCGIWGENIE	- SIOCIWFIRST] = {
-		.header_type	= IW_HEADER_TYPE_POINT,
-		.token_size	= 1,
-		.max_tokens	= IW_GENERIC_IE_MAX,
-	},
-	[SIOCSIWAUTH	- SIOCIWFIRST] = {
-		.header_type	= IW_HEADER_TYPE_PARAM,
-	},
-	[SIOCGIWAUTH	- SIOCIWFIRST] = {
-		.header_type	= IW_HEADER_TYPE_PARAM,
-	},
-	[SIOCSIWENCODEEXT - SIOCIWFIRST] = {
-		.header_type	= IW_HEADER_TYPE_POINT,
-		.token_size	= 1,
-		.min_tokens	= sizeof(struct iw_encode_ext),
-		.max_tokens	= sizeof(struct iw_encode_ext) +
-				  IW_ENCODING_TOKEN_MAX,
-	},
-	[SIOCGIWENCODEEXT - SIOCIWFIRST] = {
-		.header_type	= IW_HEADER_TYPE_POINT,
-		.token_size	= 1,
-		.min_tokens	= sizeof(struct iw_encode_ext),
-		.max_tokens	= sizeof(struct iw_encode_ext) +
-				  IW_ENCODING_TOKEN_MAX,
-	},
-	[SIOCSIWPMKSA - SIOCIWFIRST] = {
-		.header_type	= IW_HEADER_TYPE_POINT,
-		.token_size	= 1,
-		.min_tokens	= sizeof(struct iw_pmksa),
-		.max_tokens	= sizeof(struct iw_pmksa),
-	},
-};
-static const unsigned standard_ioctl_num = ARRAY_SIZE(standard_ioctl);
-
-/*
- * Meta-data about all the additional standard Wireless Extension events
- * we know about.
- */
-static const struct iw_ioctl_description standard_event[] = {
-	[IWEVTXDROP	- IWEVFIRST] = {
-		.header_type	= IW_HEADER_TYPE_ADDR,
-	},
-	[IWEVQUAL	- IWEVFIRST] = {
-		.header_type	= IW_HEADER_TYPE_QUAL,
-	},
-	[IWEVCUSTOM	- IWEVFIRST] = {
-		.header_type	= IW_HEADER_TYPE_POINT,
-		.token_size	= 1,
-		.max_tokens	= IW_CUSTOM_MAX,
-	},
-	[IWEVREGISTERED	- IWEVFIRST] = {
-		.header_type	= IW_HEADER_TYPE_ADDR,
-	},
-	[IWEVEXPIRED	- IWEVFIRST] = {
-		.header_type	= IW_HEADER_TYPE_ADDR,
-	},
-	[IWEVGENIE	- IWEVFIRST] = {
-		.header_type	= IW_HEADER_TYPE_POINT,
-		.token_size	= 1,
-		.max_tokens	= IW_GENERIC_IE_MAX,
-	},
-	[IWEVMICHAELMICFAILURE	- IWEVFIRST] = {
-		.header_type	= IW_HEADER_TYPE_POINT,
-		.token_size	= 1,
-		.max_tokens	= sizeof(struct iw_michaelmicfailure),
-	},
-	[IWEVASSOCREQIE	- IWEVFIRST] = {
-		.header_type	= IW_HEADER_TYPE_POINT,
-		.token_size	= 1,
-		.max_tokens	= IW_GENERIC_IE_MAX,
-	},
-	[IWEVASSOCRESPIE	- IWEVFIRST] = {
-		.header_type	= IW_HEADER_TYPE_POINT,
-		.token_size	= 1,
-		.max_tokens	= IW_GENERIC_IE_MAX,
-	},
-	[IWEVPMKIDCAND	- IWEVFIRST] = {
-		.header_type	= IW_HEADER_TYPE_POINT,
-		.token_size	= 1,
-		.max_tokens	= sizeof(struct iw_pmkid_cand),
-	},
-};
-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 */
-	0,
-	IW_EV_CHAR_LEN,			/* IW_HEADER_TYPE_CHAR */
-	0,
-	IW_EV_UINT_LEN,			/* IW_HEADER_TYPE_UINT */
-	IW_EV_FREQ_LEN,			/* IW_HEADER_TYPE_FREQ */
-	IW_EV_ADDR_LEN,			/* IW_HEADER_TYPE_ADDR */
-	0,
-	IW_EV_POINT_LEN,		/* Without variable payload */
-	IW_EV_PARAM_LEN,		/* IW_HEADER_TYPE_PARAM */
-	IW_EV_QUAL_LEN,			/* IW_HEADER_TYPE_QUAL */
-};
-
-#ifdef CONFIG_COMPAT
-static const int compat_event_type_size[] = {
-	IW_EV_COMPAT_LCP_LEN,		/* IW_HEADER_TYPE_NULL */
-	0,
-	IW_EV_COMPAT_CHAR_LEN,		/* IW_HEADER_TYPE_CHAR */
-	0,
-	IW_EV_COMPAT_UINT_LEN,		/* IW_HEADER_TYPE_UINT */
-	IW_EV_COMPAT_FREQ_LEN,		/* IW_HEADER_TYPE_FREQ */
-	IW_EV_COMPAT_ADDR_LEN,		/* IW_HEADER_TYPE_ADDR */
-	0,
-	IW_EV_COMPAT_POINT_LEN,		/* Without variable payload */
-	IW_EV_COMPAT_PARAM_LEN,		/* IW_HEADER_TYPE_PARAM */
-	IW_EV_COMPAT_QUAL_LEN,		/* IW_HEADER_TYPE_QUAL */
-};
-#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];
-
-	/* Not found */
-	return NULL;
-}
-
-/* ---------------------------------------------------------------- */
-/*
- * Get statistics out of the driver
- */
-struct iw_statistics *get_wireless_stats(struct net_device *dev)
-{
-	/* 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;
-}
-
-/* ---------------------------------------------------------------- */
-/*
- * 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)
-{
-	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 */
-}
-
-/* ---------------------------------------------------------------- */
-/*
- * 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;
-
-	return num * iw_priv_type_size[type];
-}
-
-/* ---------------------------------------------------------------- */
-/*
- * Re-calculate the size of private arguments
- */
-static int adjust_priv_size(__u16 args, struct iw_point *iwp)
-{
-	int	num = iwp->length;
-	int	max = args & IW_PRIV_SIZE_MASK;
-	int	type = (args & IW_PRIV_TYPE_MASK) >> 12;
-
-	/* Make sure the driver doesn't goof up */
-	if (max < num)
-		num = max;
-
-	return num * iw_priv_type_size[type];
-}
-
-/* ---------------------------------------------------------------- */
-/*
- * 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)
-{
-	/* Get stats from the driver */
-	struct iw_statistics *stats;
-
-	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);
-
-		/* 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;
-}
-
-/* ---------------------------------------------------------------- */
-/*
- * Standard Wireless Handler : get iwpriv definitions
- * Export the driver private handler definition
- * They will be picked up by tools like iwpriv...
- */
-static int iw_handler_get_private(struct net_device *		dev,
-				  struct iw_request_info *	info,
-				  union iwreq_data *		wrqu,
-				  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;
-
-	/* 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;
-	}
-
-	/* Set the number of available ioctls. */
-	wrqu->data.length = dev->wireless_handlers->num_private_args;
-
-	/* Copy structure to the user buffer. */
-	memcpy(extra, dev->wireless_handlers->private_args,
-	       sizeof(struct iw_priv_args) * wrqu->data.length);
-
-	return 0;
-}
-
-
-/******************** /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".
- */
-
-#ifdef CONFIG_PROC_FS
-
-/* ---------------------------------------------------------------- */
-/*
- * 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 = {};
-
-	/* show device if it's wireless regardless of current stats */
-	if (!stats && dev->wireless_handlers)
-		stats = &nullstats;
-
-	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;
-	}
-}
-
-/* ---------------------------------------------------------------- */
-/*
- * 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;
-}
-
-static void *wireless_dev_seq_start(struct seq_file *seq, loff_t *pos)
-{
-	struct net *net = seq_file_net(seq);
-	loff_t off;
-	struct net_device *dev;
-
-	rtnl_lock();
-	if (!*pos)
-		return SEQ_START_TOKEN;
-
-	off = 1;
-	for_each_netdev(net, dev)
-		if (off++ == *pos)
-			return dev;
-	return NULL;
-}
-
-static void *wireless_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos)
-{
-	struct net *net = seq_file_net(seq);
-
-	++*pos;
-
-	return v == SEQ_START_TOKEN ?
-		first_net_device(net) : next_net_device(v);
-}
-
-static void wireless_dev_seq_stop(struct seq_file *seq, void *v)
-{
-	rtnl_unlock();
-}
-
-static const struct seq_operations wireless_seq_ops = {
-	.start = wireless_dev_seq_start,
-	.next  = wireless_dev_seq_next,
-	.stop  = wireless_dev_seq_stop,
-	.show  = wireless_dev_seq_show,
-};
-
-static int seq_open_wireless(struct inode *inode, struct file *file)
-{
-	return seq_open_net(inode, file, &wireless_seq_ops,
-			    sizeof(struct seq_net_private));
-}
-
-static const struct file_operations wireless_seq_fops = {
-	.owner	 = THIS_MODULE,
-	.open    = seq_open_wireless,
-	.read    = seq_read,
-	.llseek  = seq_lseek,
-	.release = seq_release_net,
-};
-
-int wext_proc_init(struct net *net)
-{
-	/* Create /proc/net/wireless entry */
-	if (!proc_net_fops_create(net, "wireless", S_IRUGO, &wireless_seq_fops))
-		return -ENOMEM;
-
-	return 0;
-}
-
-void wext_proc_exit(struct net *net)
-{
-	proc_net_remove(net, "wireless");
-}
-#endif	/* CONFIG_PROC_FS */
-
-/************************** IOCTL SUPPORT **************************/
-/*
- * The original user space API to configure all those Wireless Extensions
- * is through IOCTLs.
- * In there, we check if we need to call the new driver API (iw_handler)
- * or just call the driver ioctl handler.
- */
-
-/* ---------------------------------------------------------------- */
-static int ioctl_standard_iw_point(struct iw_point *iwp, unsigned int cmd,
-				   const struct iw_ioctl_description *descr,
-				   iw_handler handler, struct net_device *dev,
-				   struct iw_request_info *info)
-{
-	int err, extra_size, user_length = 0, essid_compat = 0;
-	char *extra;
-
-	/* Calculate space needed by arguments. Always allocate
-	 * for max space.
-	 */
-	extra_size = descr->max_tokens * descr->token_size;
-
-	/* Check need for ESSID compatibility for WE < 21 */
-	switch (cmd) {
-	case SIOCSIWESSID:
-	case SIOCGIWESSID:
-	case SIOCSIWNICKN:
-	case SIOCGIWNICKN:
-		if (iwp->length == descr->max_tokens + 1)
-			essid_compat = 1;
-		else if (IW_IS_SET(cmd) && (iwp->length != 0)) {
-			char essid[IW_ESSID_MAX_SIZE + 1];
-			unsigned int len;
-			len = iwp->length * descr->token_size;
-
-			if (len > IW_ESSID_MAX_SIZE)
-				return -EFAULT;
-
-			err = copy_from_user(essid, iwp->pointer, len);
-			if (err)
-				return -EFAULT;
-
-			if (essid[iwp->length - 1] == '\0')
-				essid_compat = 1;
-		}
-		break;
-	default:
-		break;
-	}
-
-	iwp->length -= essid_compat;
-
-	/* Check what user space is giving us */
-	if (IW_IS_SET(cmd)) {
-		/* Check NULL pointer */
-		if (!iwp->pointer && iwp->length != 0)
-			return -EFAULT;
-		/* Check if number of token fits within bounds */
-		if (iwp->length > descr->max_tokens)
-			return -E2BIG;
-		if (iwp->length < descr->min_tokens)
-			return -EINVAL;
-	} else {
-		/* Check NULL pointer */
-		if (!iwp->pointer)
-			return -EFAULT;
-		/* Save user space buffer size for checking */
-		user_length = iwp->length;
-
-		/* Don't check if user_length > max to allow forward
-		 * compatibility. The test user_length < min is
-		 * implied by the test at the end.
-		 */
-
-		/* Support for very large requests */
-		if ((descr->flags & IW_DESCR_FLAG_NOMAX) &&
-		    (user_length > descr->max_tokens)) {
-			/* Allow userspace to GET more than max so
-			 * we can support any size GET requests.
-			 * There is still a limit : -ENOMEM.
-			 */
-			extra_size = user_length * descr->token_size;
-
-			/* Note : user_length is originally a __u16,
-			 * and token_size is controlled by us,
-			 * so extra_size won't get negative and
-			 * won't overflow...
-			 */
-		}
-	}
-
-	/* kzalloc() ensures NULL-termination for essid_compat. */
-	extra = kzalloc(extra_size, GFP_KERNEL);
-	if (!extra)
-		return -ENOMEM;
-
-	/* If it is a SET, get all the extra data in here */
-	if (IW_IS_SET(cmd) && (iwp->length != 0)) {
-		if (copy_from_user(extra, iwp->pointer,
-				   iwp->length *
-				   descr->token_size)) {
-			err = -EFAULT;
-			goto out;
-		}
-
-		if (cmd == SIOCSIWENCODEEXT) {
-			struct iw_encode_ext *ee = (void *) extra;
-
-			if (iwp->length < sizeof(*ee) + ee->key_len)
-				return -EFAULT;
-		}
-	}
-
-	err = handler(dev, info, (union iwreq_data *) iwp, extra);
-
-	iwp->length += essid_compat;
-
-	/* If we have something to return to the user */
-	if (!err && IW_IS_GET(cmd)) {
-		/* Check if there is enough buffer up there */
-		if (user_length < iwp->length) {
-			err = -E2BIG;
-			goto out;
-		}
-
-		if (copy_to_user(iwp->pointer, extra,
-				 iwp->length *
-				 descr->token_size)) {
-			err = -EFAULT;
-			goto out;
-		}
-	}
-
-	/* Generate an event to notify listeners of the change */
-	if ((descr->flags & IW_DESCR_FLAG_EVENT) && err == -EIWCOMMIT) {
-		union iwreq_data *data = (union iwreq_data *) iwp;
-
-		if (descr->flags & IW_DESCR_FLAG_RESTRICT)
-			/* If the event is restricted, don't
-			 * export the payload.
-			 */
-			wireless_send_event(dev, cmd, data, NULL);
-		else
-			wireless_send_event(dev, cmd, data, extra);
-	}
-
-out:
-	kfree(extra);
-	return err;
-}
-
-/*
- * Wrapper to call a standard Wireless Extension handler.
- * We do various checks and also take care of moving data between
- * user space and kernel space.
- */
-static int ioctl_standard_call(struct net_device *	dev,
-			       struct iwreq		*iwr,
-			       unsigned int		cmd,
-			       struct iw_request_info	*info,
-			       iw_handler		handler)
-{
-	const struct iw_ioctl_description *	descr;
-	int					ret = -EINVAL;
-
-	/* Get the description of the IOCTL */
-	if ((cmd - SIOCIWFIRST) >= standard_ioctl_num)
-		return -EOPNOTSUPP;
-	descr = &(standard_ioctl[cmd - SIOCIWFIRST]);
-
-	/* Check if we have a pointer to user space data or not */
-	if (descr->header_type != IW_HEADER_TYPE_POINT) {
-
-		/* No extra arguments. Trivial to handle */
-		ret = handler(dev, info, &(iwr->u), NULL);
-
-		/* Generate an event to notify listeners of the change */
-		if ((descr->flags & IW_DESCR_FLAG_EVENT) &&
-		   ((ret == 0) || (ret == -EIWCOMMIT)))
-			wireless_send_event(dev, cmd, &(iwr->u), NULL);
-	} else {
-		ret = ioctl_standard_iw_point(&iwr->u.data, cmd, descr,
-					      handler, dev, info);
-	}
-
-	/* Call commit handler if needed and defined */
-	if (ret == -EIWCOMMIT)
-		ret = call_commit_handler(dev);
-
-	/* Here, we will generate the appropriate event if needed */
-
-	return ret;
-}
-
-/* ---------------------------------------------------------------- */
-/*
- * Wrapper to call a private Wireless Extension handler.
- * We do various checks and also take care of moving data between
- * user space and kernel space.
- * It's not as nice and slimline as the standard wrapper. The cause
- * is struct iw_priv_args, which was not really designed for the
- * job we are going here.
- *
- * IMPORTANT : This function prevent to set and get data on the same
- * IOCTL and enforce the SET/GET convention. Not doing it would be
- * far too hairy...
- * If you need to set and get data at the same time, please don't use
- * a iw_handler but process it in your ioctl handler (i.e. use the
- * old driver API).
- */
-static int get_priv_descr_and_size(struct net_device *dev, unsigned int cmd,
-				   const struct iw_priv_args **descrp)
-{
-	const struct iw_priv_args *descr;
-	int i, extra_size;
-
-	descr = NULL;
-	for (i = 0; i < dev->wireless_handlers->num_private_args; i++) {
-		if (cmd == dev->wireless_handlers->private_args[i].cmd) {
-			descr = &dev->wireless_handlers->private_args[i];
-			break;
-		}
-	}
-
-	extra_size = 0;
-	if (descr) {
-		if (IW_IS_SET(cmd)) {
-			int	offset = 0;	/* For sub-ioctls */
-			/* Check for sub-ioctl handler */
-			if (descr->name[0] == '\0')
-				/* Reserve one int for sub-ioctl index */
-				offset = sizeof(__u32);
-
-			/* Size of set arguments */
-			extra_size = get_priv_size(descr->set_args);
-
-			/* Does it fits in iwr ? */
-			if ((descr->set_args & IW_PRIV_SIZE_FIXED) &&
-			   ((extra_size + offset) <= IFNAMSIZ))
-				extra_size = 0;
-		} else {
-			/* Size of get arguments */
-			extra_size = get_priv_size(descr->get_args);
-
-			/* Does it fits in iwr ? */
-			if ((descr->get_args & IW_PRIV_SIZE_FIXED) &&
-			   (extra_size <= IFNAMSIZ))
-				extra_size = 0;
-		}
-	}
-	*descrp = descr;
-	return extra_size;
-}
-
-static int ioctl_private_iw_point(struct iw_point *iwp, unsigned int cmd,
-				  const struct iw_priv_args *descr,
-				  iw_handler handler, struct net_device *dev,
-				  struct iw_request_info *info, int extra_size)
-{
-	char *extra;
-	int err;
-
-	/* Check what user space is giving us */
-	if (IW_IS_SET(cmd)) {
-		if (!iwp->pointer && iwp->length != 0)
-			return -EFAULT;
-
-		if (iwp->length > (descr->set_args & IW_PRIV_SIZE_MASK))
-			return -E2BIG;
-	} else if (!iwp->pointer)
-		return -EFAULT;
-
-	extra = kmalloc(extra_size, GFP_KERNEL);
-	if (!extra)
-		return -ENOMEM;
-
-	/* If it is a SET, get all the extra data in here */
-	if (IW_IS_SET(cmd) && (iwp->length != 0)) {
-		if (copy_from_user(extra, iwp->pointer, extra_size)) {
-			err = -EFAULT;
-			goto out;
-		}
-	}
-
-	/* Call the handler */
-	err = handler(dev, info, (union iwreq_data *) iwp, extra);
-
-	/* If we have something to return to the user */
-	if (!err && IW_IS_GET(cmd)) {
-		/* Adjust for the actual length if it's variable,
-		 * avoid leaking kernel bits outside.
-		 */
-		if (!(descr->get_args & IW_PRIV_SIZE_FIXED))
-			extra_size = adjust_priv_size(descr->get_args, iwp);
-
-		if (copy_to_user(iwp->pointer, extra, extra_size))
-			err =  -EFAULT;
-	}
-
-out:
-	kfree(extra);
-	return err;
-}
-
-static int ioctl_private_call(struct net_device *dev, struct iwreq *iwr,
-			      unsigned int cmd, struct iw_request_info *info,
-			      iw_handler handler)
-{
-	int extra_size = 0, ret = -EINVAL;
-	const struct iw_priv_args *descr;
-
-	extra_size = get_priv_descr_and_size(dev, cmd, &descr);
-
-	/* Check if we have a pointer to user space data or not. */
-	if (extra_size == 0) {
-		/* No extra arguments. Trivial to handle */
-		ret = handler(dev, info, &(iwr->u), (char *) &(iwr->u));
-	} else {
-		ret = ioctl_private_iw_point(&iwr->u.data, cmd, descr,
-					     handler, dev, info, extra_size);
-	}
-
-	/* Call commit handler if needed and defined */
-	if (ret == -EIWCOMMIT)
-		ret = call_commit_handler(dev);
-
-	return ret;
-}
-
-/* ---------------------------------------------------------------- */
-typedef int (*wext_ioctl_func)(struct net_device *, struct iwreq *,
-			       unsigned int, struct iw_request_info *,
-			       iw_handler);
-
-/*
- * Main IOCTl dispatcher.
- * Check the type of IOCTL and call the appropriate wrapper...
- */
-static int wireless_process_ioctl(struct net *net, struct ifreq *ifr,
-				  unsigned int cmd,
-				  struct iw_request_info *info,
-				  wext_ioctl_func standard,
-				  wext_ioctl_func private)
-{
-	struct iwreq *iwr = (struct iwreq *) ifr;
-	struct net_device *dev;
-	iw_handler	handler;
-
-	/* Permissions are already checked in dev_ioctl() before calling us.
-	 * The copy_to/from_user() of ifr is also dealt with in there */
-
-	/* Make sure the device exist */
-	if ((dev = __dev_get_by_name(net, ifr->ifr_name)) == NULL)
-		return -ENODEV;
-
-	/* A bunch of special cases, then the generic case...
-	 * Note that 'cmd' is already filtered in dev_ioctl() with
-	 * (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) */
-	if (cmd == SIOCGIWSTATS)
-		return standard(dev, iwr, cmd, info,
-				&iw_handler_get_iwstats);
-
-	if (cmd == SIOCGIWPRIV && dev->wireless_handlers)
-		return standard(dev, iwr, cmd, info,
-				&iw_handler_get_private);
-
-	/* Basic check */
-	if (!netif_device_present(dev))
-		return -ENODEV;
-
-	/* New driver API : try to find the handler */
-	handler = get_handler(dev, cmd);
-	if (handler) {
-		/* Standard and private are not the same */
-		if (cmd < SIOCIWFIRSTPRIV)
-			return standard(dev, iwr, cmd, info, handler);
-		else
-			return private(dev, iwr, cmd, info, handler);
-	}
-	/* Old driver API : call driver ioctl handler */
-	if (dev->netdev_ops->ndo_do_ioctl)
-		return dev->netdev_ops->ndo_do_ioctl(dev, ifr, cmd);
-	return -EOPNOTSUPP;
-}
-
-/* If command is `set a parameter', or `get the encoding parameters',
- * check if the user has the right to do it.
- */
-static int wext_permission_check(unsigned int cmd)
-{
-	if ((IW_IS_SET(cmd) || cmd == SIOCGIWENCODE || cmd == SIOCGIWENCODEEXT)
-	    && !capable(CAP_NET_ADMIN))
-		return -EPERM;
-
-	return 0;
-}
-
-/* entry point from dev ioctl */
-static int wext_ioctl_dispatch(struct net *net, struct ifreq *ifr,
-			       unsigned int cmd, struct iw_request_info *info,
-			       wext_ioctl_func standard,
-			       wext_ioctl_func private)
-{
-	int ret = wext_permission_check(cmd);
-
-	if (ret)
-		return ret;
-
-	dev_load(net, ifr->ifr_name);
-	rtnl_lock();
-	ret = wireless_process_ioctl(net, ifr, cmd, info, standard, private);
-	rtnl_unlock();
-
-	return ret;
-}
-
-int wext_handle_ioctl(struct net *net, struct ifreq *ifr, unsigned int cmd,
-		      void __user *arg)
-{
-	struct iw_request_info info = { .cmd = cmd, .flags = 0 };
-	int ret;
-
-	ret = wext_ioctl_dispatch(net, ifr, cmd, &info,
-				  ioctl_standard_call,
-				  ioctl_private_call);
-	if (ret >= 0 &&
-	    IW_IS_GET(cmd) &&
-	    copy_to_user(arg, ifr, sizeof(struct iwreq)))
-		return -EFAULT;
-
-	return ret;
-}
-
-#ifdef CONFIG_COMPAT
-static int compat_standard_call(struct net_device	*dev,
-				struct iwreq		*iwr,
-				unsigned int		cmd,
-				struct iw_request_info	*info,
-				iw_handler		handler)
-{
-	const struct iw_ioctl_description *descr;
-	struct compat_iw_point *iwp_compat;
-	struct iw_point iwp;
-	int err;
-
-	descr = standard_ioctl + (cmd - SIOCIWFIRST);
-
-	if (descr->header_type != IW_HEADER_TYPE_POINT)
-		return ioctl_standard_call(dev, iwr, cmd, info, handler);
-
-	iwp_compat = (struct compat_iw_point *) &iwr->u.data;
-	iwp.pointer = compat_ptr(iwp_compat->pointer);
-	iwp.length = iwp_compat->length;
-	iwp.flags = iwp_compat->flags;
-
-	err = ioctl_standard_iw_point(&iwp, cmd, descr, handler, dev, info);
-
-	iwp_compat->pointer = ptr_to_compat(iwp.pointer);
-	iwp_compat->length = iwp.length;
-	iwp_compat->flags = iwp.flags;
-
-	return err;
-}
-
-static int compat_private_call(struct net_device *dev, struct iwreq *iwr,
-			       unsigned int cmd, struct iw_request_info *info,
-			       iw_handler handler)
-{
-	const struct iw_priv_args *descr;
-	int ret, extra_size;
-
-	extra_size = get_priv_descr_and_size(dev, cmd, &descr);
-
-	/* Check if we have a pointer to user space data or not. */
-	if (extra_size == 0) {
-		/* No extra arguments. Trivial to handle */
-		ret = handler(dev, info, &(iwr->u), (char *) &(iwr->u));
-	} else {
-		struct compat_iw_point *iwp_compat;
-		struct iw_point iwp;
-
-		iwp_compat = (struct compat_iw_point *) &iwr->u.data;
-		iwp.pointer = compat_ptr(iwp_compat->pointer);
-		iwp.length = iwp_compat->length;
-		iwp.flags = iwp_compat->flags;
-
-		ret = ioctl_private_iw_point(&iwp, cmd, descr,
-					     handler, dev, info, extra_size);
-
-		iwp_compat->pointer = ptr_to_compat(iwp.pointer);
-		iwp_compat->length = iwp.length;
-		iwp_compat->flags = iwp.flags;
-	}
-
-	/* Call commit handler if needed and defined */
-	if (ret == -EIWCOMMIT)
-		ret = call_commit_handler(dev);
-
-	return ret;
-}
-
-int compat_wext_handle_ioctl(struct net *net, unsigned int cmd,
-			     unsigned long arg)
-{
-	void __user *argp = (void __user *)arg;
-	struct iw_request_info info;
-	struct iwreq iwr;
-	char *colon;
-	int ret;
-
-	if (copy_from_user(&iwr, argp, sizeof(struct iwreq)))
-		return -EFAULT;
-
-	iwr.ifr_name[IFNAMSIZ-1] = 0;
-	colon = strchr(iwr.ifr_name, ':');
-	if (colon)
-		*colon = 0;
-
-	info.cmd = cmd;
-	info.flags = IW_REQUEST_FLAG_COMPAT;
-
-	ret = wext_ioctl_dispatch(net, (struct ifreq *) &iwr, cmd, &info,
-				  compat_standard_call,
-				  compat_private_call);
-
-	if (ret >= 0 &&
-	    IW_IS_GET(cmd) &&
-	    copy_to_user(argp, &iwr, sizeof(struct iwreq)))
-		return -EFAULT;
-
-	return ret;
-}
-#endif
-
-static int __net_init wext_pernet_init(struct net *net)
-{
-	skb_queue_head_init(&net->wext_nlevents);
-	return 0;
-}
-
-static void __net_exit wext_pernet_exit(struct net *net)
-{
-	skb_queue_purge(&net->wext_nlevents);
-}
-
-static struct pernet_operations wext_pernet_ops = {
-	.init = wext_pernet_init,
-	.exit = wext_pernet_exit,
-};
-
-static int __init wireless_nlevent_init(void)
-{
-	return register_pernet_subsys(&wext_pernet_ops);
-}
-
-subsys_initcall(wireless_nlevent_init);
-
-/* Process events generated by the wireless layer or the driver. */
-static void wireless_nlevent_process(struct work_struct *work)
-{
-	struct sk_buff *skb;
-	struct net *net;
-
-	rtnl_lock();
-
-	for_each_net(net) {
-		while ((skb = skb_dequeue(&net->wext_nlevents)))
-			rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL,
-				    GFP_KERNEL);
-	}
-
-	rtnl_unlock();
-}
-
-static DECLARE_WORK(wireless_nlevent_work, wireless_nlevent_process);
-
-static struct nlmsghdr *rtnetlink_ifinfo_prep(struct net_device *dev,
-					      struct sk_buff *skb)
-{
-	struct ifinfomsg *r;
-	struct nlmsghdr  *nlh;
-
-	nlh = nlmsg_put(skb, 0, 0, RTM_NEWLINK, sizeof(*r), 0);
-	if (!nlh)
-		return NULL;
-
-	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;
-}
-
-
-/*
- * Main event dispatcher. Called from other parts and drivers.
- * Send the event on the appropriate channels.
- * May be called from interrupt context.
- */
-void wireless_send_event(struct net_device *	dev,
-			 unsigned int		cmd,
-			 union iwreq_data *	wrqu,
-			 const char *		extra)
-{
-	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
-
-	/*
-	 * 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;
-	}
-
-	/* 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;
-	}
-
-	/* Total length of the event */
-	hdr_len = event_type_size[descr->header_type];
-	event_len = hdr_len + extra_len;
-
-	/*
-	 * 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;
-
-	/* Send via the RtNetlink event channel */
-	nlh = rtnetlink_ifinfo_prep(dev, skb);
-	if (WARN_ON(!nlh)) {
-		kfree_skb(skb);
-		return;
-	}
-
-	/* 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);
-
-	/* 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);
-
-	nlmsg_end(skb, nlh);
-#ifdef CONFIG_COMPAT
-	hdr_len = compat_event_type_size[descr->header_type];
-	event_len = hdr_len + extra_len;
-
-	compskb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
-	if (!compskb) {
-		kfree_skb(skb);
-		return;
-	}
-
-	/* 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;
-	}
-	compat_event = nla_data(nla);
-
-	compat_event->len = event_len;
-	compat_event->cmd = cmd;
-	if (descr->header_type == IW_HEADER_TYPE_POINT) {
-		compat_wrqu.length = wrqu->data.length;
-		compat_wrqu.flags = wrqu->data.flags;
-		memcpy(&compat_event->pointer,
-			((char *) &compat_wrqu) + IW_EV_COMPAT_POINT_OFF,
-			hdr_len - IW_EV_COMPAT_LCP_LEN);
-		if (extra_len)
-			memcpy(((char *) compat_event) + hdr_len,
-				extra, extra_len);
-	} else {
-		/* extra_len must be zero, so no if (extra) needed */
-		memcpy(&compat_event->pointer, wrqu,
-			hdr_len - IW_EV_COMPAT_LCP_LEN);
-	}
-
-	nlmsg_end(compskb, nlh);
-
-	skb_shinfo(skb)->frag_list = compskb;
-#endif
-	skb_queue_tail(&dev_net(dev)->wext_nlevents, skb);
-	schedule_work(&wireless_nlevent_work);
-}
-EXPORT_SYMBOL(wireless_send_event);
-
-/********************** ENHANCED IWSPY SUPPORT **********************/
-/*
- * In the old days, the driver was handling spy support all by itself.
- * Now, the driver can delegate this task to Wireless Extensions.
- * It needs to use those standard spy iw_handler in struct iw_handler_def,
- * push data to us via wireless_spy_update() and include struct iw_spy_data
- * in its private part (and export it in net_device->wireless_data->spy_data).
- * One of the main advantage of centralising spy support here is that
- * it becomes much easier to improve and extend it without having to touch
- * the drivers. One example is the addition of the Spy-Threshold events.
- */
-
-/* ---------------------------------------------------------------- */
-/*
- * Return the pointer to the spy data in the driver.
- * Because this is called on the Rx path via wireless_spy_update(),
- * we want it to be efficient...
- */
-static inline struct iw_spy_data *get_spydata(struct net_device *dev)
-{
-	/* This is the new way */
-	if (dev->wireless_data)
-		return dev->wireless_data->spy_data;
-	return NULL;
-}
-
-/*------------------------------------------------------------------*/
-/*
- * Standard Wireless Handler : set Spy List
- */
-int iw_handler_set_spy(struct net_device *	dev,
-		       struct iw_request_info *	info,
-		       union iwreq_data *	wrqu,
-		       char *			extra)
-{
-	struct iw_spy_data *	spydata = get_spydata(dev);
-	struct sockaddr *	address = (struct sockaddr *) extra;
-
-	/* Make sure driver is not buggy or using the old API */
-	if (!spydata)
-		return -EOPNOTSUPP;
-
-	/* Disable spy collection while we copy the addresses.
-	 * While we copy addresses, any call to wireless_spy_update()
-	 * will NOP. This is OK, as anyway the addresses are changing. */
-	spydata->spy_number = 0;
-
-	/* We want to operate without locking, because wireless_spy_update()
-	 * most likely will happen in the interrupt handler, and therefore
-	 * have its own locking constraints and needs performance.
-	 * The rtnl_lock() make sure we don't race with the other iw_handlers.
-	 * This make sure wireless_spy_update() "see" that the spy list
-	 * is temporarily disabled. */
-	smp_wmb();
-
-	/* Are there are addresses to copy? */
-	if (wrqu->data.length > 0) {
-		int i;
-
-		/* Copy addresses */
-		for (i = 0; i < wrqu->data.length; i++)
-			memcpy(spydata->spy_address[i], address[i].sa_data,
-			       ETH_ALEN);
-		/* Reset stats */
-		memset(spydata->spy_stat, 0,
-		       sizeof(struct iw_quality) * IW_MAX_SPY);
-	}
-
-	/* Make sure above is updated before re-enabling */
-	smp_wmb();
-
-	/* Enable addresses */
-	spydata->spy_number = wrqu->data.length;
-
-	return 0;
-}
-EXPORT_SYMBOL(iw_handler_set_spy);
-
-/*------------------------------------------------------------------*/
-/*
- * Standard Wireless Handler : get Spy List
- */
-int iw_handler_get_spy(struct net_device *	dev,
-		       struct iw_request_info *	info,
-		       union iwreq_data *	wrqu,
-		       char *			extra)
-{
-	struct iw_spy_data *	spydata = get_spydata(dev);
-	struct sockaddr *	address = (struct sockaddr *) extra;
-	int			i;
-
-	/* Make sure driver is not buggy or using the old API */
-	if (!spydata)
-		return -EOPNOTSUPP;
-
-	wrqu->data.length = spydata->spy_number;
-
-	/* Copy addresses. */
-	for (i = 0; i < spydata->spy_number; i++) 	{
-		memcpy(address[i].sa_data, spydata->spy_address[i], ETH_ALEN);
-		address[i].sa_family = AF_UNIX;
-	}
-	/* Copy stats to the user buffer (just after). */
-	if (spydata->spy_number > 0)
-		memcpy(extra  + (sizeof(struct sockaddr) *spydata->spy_number),
-		       spydata->spy_stat,
-		       sizeof(struct iw_quality) * spydata->spy_number);
-	/* Reset updated flags. */
-	for (i = 0; i < spydata->spy_number; i++)
-		spydata->spy_stat[i].updated &= ~IW_QUAL_ALL_UPDATED;
-	return 0;
-}
-EXPORT_SYMBOL(iw_handler_get_spy);
-
-/*------------------------------------------------------------------*/
-/*
- * Standard Wireless Handler : set spy threshold
- */
-int iw_handler_set_thrspy(struct net_device *	dev,
-			  struct iw_request_info *info,
-			  union iwreq_data *	wrqu,
-			  char *		extra)
-{
-	struct iw_spy_data *	spydata = get_spydata(dev);
-	struct iw_thrspy *	threshold = (struct iw_thrspy *) extra;
-
-	/* Make sure driver is not buggy or using the old API */
-	if (!spydata)
-		return -EOPNOTSUPP;
-
-	/* Just do it */
-	memcpy(&(spydata->spy_thr_low), &(threshold->low),
-	       2 * sizeof(struct iw_quality));
-
-	/* Clear flag */
-	memset(spydata->spy_thr_under, '\0', sizeof(spydata->spy_thr_under));
-
-	return 0;
-}
-EXPORT_SYMBOL(iw_handler_set_thrspy);
-
-/*------------------------------------------------------------------*/
-/*
- * Standard Wireless Handler : get spy threshold
- */
-int iw_handler_get_thrspy(struct net_device *	dev,
-			  struct iw_request_info *info,
-			  union iwreq_data *	wrqu,
-			  char *		extra)
-{
-	struct iw_spy_data *	spydata = get_spydata(dev);
-	struct iw_thrspy *	threshold = (struct iw_thrspy *) extra;
-
-	/* Make sure driver is not buggy or using the old API */
-	if (!spydata)
-		return -EOPNOTSUPP;
-
-	/* Just do it */
-	memcpy(&(threshold->low), &(spydata->spy_thr_low),
-	       2 * sizeof(struct iw_quality));
-
-	return 0;
-}
-EXPORT_SYMBOL(iw_handler_get_thrspy);
-
-/*------------------------------------------------------------------*/
-/*
- * Prepare and send a Spy Threshold event
- */
-static void iw_send_thrspy_event(struct net_device *	dev,
-				 struct iw_spy_data *	spydata,
-				 unsigned char *	address,
-				 struct iw_quality *	wstats)
-{
-	union iwreq_data	wrqu;
-	struct iw_thrspy	threshold;
-
-	/* Init */
-	wrqu.data.length = 1;
-	wrqu.data.flags = 0;
-	/* Copy address */
-	memcpy(threshold.addr.sa_data, address, ETH_ALEN);
-	threshold.addr.sa_family = ARPHRD_ETHER;
-	/* Copy stats */
-	memcpy(&(threshold.qual), wstats, sizeof(struct iw_quality));
-	/* Copy also thresholds */
-	memcpy(&(threshold.low), &(spydata->spy_thr_low),
-	       2 * sizeof(struct iw_quality));
-
-	/* Send event to user space */
-	wireless_send_event(dev, SIOCGIWTHRSPY, &wrqu, (char *) &threshold);
-}
-
-/* ---------------------------------------------------------------- */
-/*
- * Call for the driver to update the spy data.
- * For now, the spy data is a simple array. As the size of the array is
- * small, this is good enough. If we wanted to support larger number of
- * spy addresses, we should use something more efficient...
- */
-void wireless_spy_update(struct net_device *	dev,
-			 unsigned char *	address,
-			 struct iw_quality *	wstats)
-{
-	struct iw_spy_data *	spydata = get_spydata(dev);
-	int			i;
-	int			match = -1;
-
-	/* Make sure driver is not buggy or using the old API */
-	if (!spydata)
-		return;
-
-	/* Update all records that match */
-	for (i = 0; i < spydata->spy_number; i++)
-		if (!compare_ether_addr(address, spydata->spy_address[i])) {
-			memcpy(&(spydata->spy_stat[i]), wstats,
-			       sizeof(struct iw_quality));
-			match = i;
-		}
-
-	/* Generate an event if we cross the spy threshold.
-	 * To avoid event storms, we have a simple hysteresis : we generate
-	 * event only when we go under the low threshold or above the
-	 * high threshold. */
-	if (match >= 0) {
-		if (spydata->spy_thr_under[match]) {
-			if (wstats->level > spydata->spy_thr_high.level) {
-				spydata->spy_thr_under[match] = 0;
-				iw_send_thrspy_event(dev, spydata,
-						     address, wstats);
-			}
-		} else {
-			if (wstats->level < spydata->spy_thr_low.level) {
-				spydata->spy_thr_under[match] = 1;
-				iw_send_thrspy_event(dev, spydata,
-						     address, wstats);
-			}
-		}
-	}
-}
-EXPORT_SYMBOL(wireless_spy_update);