Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2)  * This file implement the Wireless Extensions priv API.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  * Authors :	Jean Tourrilhes - HPL - <jt@hpl.hp.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Copyright (c) 1997-2007 Jean Tourrilhes, All Rights Reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  * Copyright	2009 Johannes Berg <johannes@sipsolutions.net>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  * (As all part of the Linux kernel, this file is GPL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/wireless.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/netdevice.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <net/iw_handler.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <net/wext.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) int iw_handler_get_private(struct net_device *		dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) 			   struct iw_request_info *	info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) 			   union iwreq_data *		wrqu,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) 			   char *			extra)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 	/* Check if the driver has something to export */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 	if ((dev->wireless_handlers->num_private_args == 0) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 	   (dev->wireless_handlers->private_args == NULL))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 		return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 	/* Check if there is enough buffer up there */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 	if (wrqu->data.length < dev->wireless_handlers->num_private_args) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 		/* User space can't know in advance how large the buffer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 		 * needs to be. Give it a hint, so that we can support
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 		 * any size buffer we want somewhat efficiently... */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 		wrqu->data.length = dev->wireless_handlers->num_private_args;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 		return -E2BIG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 	/* Set the number of available ioctls. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 	wrqu->data.length = dev->wireless_handlers->num_private_args;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	/* Copy structure to the user buffer. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 	memcpy(extra, dev->wireless_handlers->private_args,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	       sizeof(struct iw_priv_args) * wrqu->data.length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) /* Size (in bytes) of the various private data types */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) static const char iw_priv_type_size[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	0,				/* IW_PRIV_TYPE_NONE */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	1,				/* IW_PRIV_TYPE_BYTE */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 	1,				/* IW_PRIV_TYPE_CHAR */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	0,				/* Not defined */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	sizeof(__u32),			/* IW_PRIV_TYPE_INT */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	sizeof(struct iw_freq),		/* IW_PRIV_TYPE_FLOAT */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	sizeof(struct sockaddr),	/* IW_PRIV_TYPE_ADDR */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	0,				/* Not defined */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) static int get_priv_size(__u16 args)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	int	num = args & IW_PRIV_SIZE_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	int	type = (args & IW_PRIV_TYPE_MASK) >> 12;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	return num * iw_priv_type_size[type];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) static int adjust_priv_size(__u16 args, struct iw_point *iwp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	int	num = iwp->length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	int	max = args & IW_PRIV_SIZE_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	int	type = (args & IW_PRIV_TYPE_MASK) >> 12;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	/* Make sure the driver doesn't goof up */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	if (max < num)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 		num = max;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	return num * iw_priv_type_size[type];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79)  * Wrapper to call a private Wireless Extension handler.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80)  * We do various checks and also take care of moving data between
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81)  * user space and kernel space.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82)  * It's not as nice and slimline as the standard wrapper. The cause
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83)  * is struct iw_priv_args, which was not really designed for the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84)  * job we are going here.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86)  * IMPORTANT : This function prevent to set and get data on the same
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87)  * IOCTL and enforce the SET/GET convention. Not doing it would be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88)  * far too hairy...
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89)  * If you need to set and get data at the same time, please don't use
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90)  * a iw_handler but process it in your ioctl handler (i.e. use the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91)  * old driver API).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) static int get_priv_descr_and_size(struct net_device *dev, unsigned int cmd,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 				   const struct iw_priv_args **descrp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	const struct iw_priv_args *descr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	int i, extra_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 	descr = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 	for (i = 0; i < dev->wireless_handlers->num_private_args; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 		if (cmd == dev->wireless_handlers->private_args[i].cmd) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 			descr = &dev->wireless_handlers->private_args[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	extra_size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	if (descr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 		if (IW_IS_SET(cmd)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 			int	offset = 0;	/* For sub-ioctls */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 			/* Check for sub-ioctl handler */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 			if (descr->name[0] == '\0')
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 				/* Reserve one int for sub-ioctl index */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 				offset = sizeof(__u32);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 			/* Size of set arguments */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 			extra_size = get_priv_size(descr->set_args);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 			/* Does it fits in iwr ? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 			if ((descr->set_args & IW_PRIV_SIZE_FIXED) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 			   ((extra_size + offset) <= IFNAMSIZ))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 				extra_size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 		} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 			/* Size of get arguments */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 			extra_size = get_priv_size(descr->get_args);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 			/* Does it fits in iwr ? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 			if ((descr->get_args & IW_PRIV_SIZE_FIXED) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 			   (extra_size <= IFNAMSIZ))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 				extra_size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	*descrp = descr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 	return extra_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) static int ioctl_private_iw_point(struct iw_point *iwp, unsigned int cmd,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 				  const struct iw_priv_args *descr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 				  iw_handler handler, struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 				  struct iw_request_info *info, int extra_size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	char *extra;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 	/* Check what user space is giving us */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	if (IW_IS_SET(cmd)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 		if (!iwp->pointer && iwp->length != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 			return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 		if (iwp->length > (descr->set_args & IW_PRIV_SIZE_MASK))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 			return -E2BIG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	} else if (!iwp->pointer)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 		return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	extra = kzalloc(extra_size, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	if (!extra)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	/* If it is a SET, get all the extra data in here */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	if (IW_IS_SET(cmd) && (iwp->length != 0)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 		if (copy_from_user(extra, iwp->pointer, extra_size)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 			err = -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 			goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	/* Call the handler */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	err = handler(dev, info, (union iwreq_data *) iwp, extra);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 	/* If we have something to return to the user */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	if (!err && IW_IS_GET(cmd)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 		/* Adjust for the actual length if it's variable,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 		 * avoid leaking kernel bits outside.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 		if (!(descr->get_args & IW_PRIV_SIZE_FIXED))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 			extra_size = adjust_priv_size(descr->get_args, iwp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 		if (copy_to_user(iwp->pointer, extra, extra_size))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 			err =  -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	kfree(extra);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) int ioctl_private_call(struct net_device *dev, struct iwreq *iwr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 		       unsigned int cmd, struct iw_request_info *info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 		       iw_handler handler)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	int extra_size = 0, ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	const struct iw_priv_args *descr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 	extra_size = get_priv_descr_and_size(dev, cmd, &descr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	/* Check if we have a pointer to user space data or not. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 	if (extra_size == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 		/* No extra arguments. Trivial to handle */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 		ret = handler(dev, info, &(iwr->u), (char *) &(iwr->u));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 		ret = ioctl_private_iw_point(&iwr->u.data, cmd, descr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 					     handler, dev, info, extra_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	/* Call commit handler if needed and defined */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	if (ret == -EIWCOMMIT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 		ret = call_commit_handler(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) #ifdef CONFIG_COMPAT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) int compat_private_call(struct net_device *dev, struct iwreq *iwr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 			unsigned int cmd, struct iw_request_info *info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 			iw_handler handler)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 	const struct iw_priv_args *descr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	int ret, extra_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 	extra_size = get_priv_descr_and_size(dev, cmd, &descr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 	/* Check if we have a pointer to user space data or not. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 	if (extra_size == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 		/* No extra arguments. Trivial to handle */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 		ret = handler(dev, info, &(iwr->u), (char *) &(iwr->u));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 		struct compat_iw_point *iwp_compat;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 		struct iw_point iwp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 		iwp_compat = (struct compat_iw_point *) &iwr->u.data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 		iwp.pointer = compat_ptr(iwp_compat->pointer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 		iwp.length = iwp_compat->length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 		iwp.flags = iwp_compat->flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 		ret = ioctl_private_iw_point(&iwp, cmd, descr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 					     handler, dev, info, extra_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 		iwp_compat->pointer = ptr_to_compat(iwp.pointer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 		iwp_compat->length = iwp.length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 		iwp_compat->flags = iwp.flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 	/* Call commit handler if needed and defined */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 	if (ret == -EIWCOMMIT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 		ret = call_commit_handler(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) #endif