fs/compat_ioctl.c



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/*
 * ioctl32.c: Conversion between 32bit and 64bit native ioctls.
 *
 * Copyright (C) 1997-2000  Jakub Jelinek  (jakub@redhat.com)
 * Copyright (C) 1998  Eddie C. Dost  (ecd@skynet.be)
 * Copyright (C) 2001,2002  Andi Kleen, SuSE Labs 
 * Copyright (C) 2003       Pavel Machek (pavel@suse.cz)
 *
 * These routines maintain argument size conversion between 32bit and 64bit
 * ioctls.
 */

#include <linux/config.h>
#include <linux/types.h>
#include <linux/compat.h>
#include <linux/kernel.h>
#include <linux/capability.h>
#include <linux/compiler.h>
#include <linux/sched.h>
#include <linux/smp.h>
#include <linux/smp_lock.h>
#include <linux/ioctl.h>
#include <linux/if.h>
#include <linux/if_bridge.h>
#include <linux/slab.h>
#include <linux/hdreg.h>
#include <linux/raid/md.h>
#include <linux/kd.h>
#include <linux/dirent.h>
#include <linux/route.h>
#include <linux/in6.h>
#include <linux/ipv6_route.h>
#include <linux/skbuff.h>
#include <linux/netlink.h>
#include <linux/vt.h>
#include <linux/fs.h>
#include <linux/file.h>
#include <linux/fd.h>
#include <linux/ppp_defs.h>
#include <linux/if_ppp.h>
#include <linux/if_pppox.h>
#include <linux/mtio.h>
#include <linux/cdrom.h>
#include <linux/loop.h>
#include <linux/auto_fs.h>
#include <linux/auto_fs4.h>
#include <linux/devfs_fs.h>
#include <linux/tty.h>
#include <linux/vt_kern.h>
#include <linux/fb.h>
#include <linux/ext2_fs.h>
#include <linux/ext3_jbd.h>
#include <linux/ext3_fs.h>
#include <linux/videodev.h>
#include <linux/netdevice.h>
#include <linux/raw.h>
#include <linux/smb_fs.h>
#include <linux/blkpg.h>
#include <linux/blkdev.h>
#include <linux/elevator.h>
#include <linux/rtc.h>
#include <linux/pci.h>
#include <linux/module.h>
#include <linux/serial.h>
#include <linux/reiserfs_fs.h>
#include <linux/if_tun.h>
#include <linux/ctype.h>
#include <linux/ioctl32.h>
#include <linux/syscalls.h>
#include <linux/ncp_fs.h>
#include <linux/i2c.h>
#include <linux/i2c-dev.h>
#include <linux/wireless.h>
#include <linux/atalk.h>
#include <linux/blktrace_api.h>

#include <net/sock.h>          /* siocdevprivate_ioctl */
#include <net/bluetooth/bluetooth.h>
#include <net/bluetooth/hci.h>
#include <net/bluetooth/rfcomm.h>

#include <linux/capi.h>

#include <scsi/scsi.h>
#include <scsi/scsi_ioctl.h>
#include <scsi/sg.h>

#include <asm/uaccess.h>
#include <linux/ethtool.h>
#include <linux/mii.h>
#include <linux/if_bonding.h>
#include <linux/watchdog.h>
#include <linux/dm-ioctl.h>

#include <linux/soundcard.h>
#include <linux/lp.h>
#include <linux/ppdev.h>

#include <linux/atm.h>
#include <linux/atmarp.h>
#include <linux/atmclip.h>
#include <linux/atmdev.h>
#include <linux/atmioc.h>
#include <linux/atmlec.h>
#include <linux/atmmpc.h>
#include <linux/atmsvc.h>
#include <linux/atm_tcp.h>
#include <linux/sonet.h>
#include <linux/atm_suni.h>
#include <linux/mtd/mtd.h>

#include <linux/usb.h>
#include <linux/usbdevice_fs.h>
#include <linux/nbd.h>
#include <linux/random.h>
#include <linux/filter.h>
#include <linux/msdos_fs.h>
#include <linux/pktcdvd.h>

#include <linux/hiddev.h>

#include <linux/dvb/audio.h>
#include <linux/dvb/dmx.h>
#include <linux/dvb/frontend.h>
#include <linux/dvb/video.h>
#include <linux/lp.h>

/* Aiee. Someone does not find a difference between int and long */
#define EXT2_IOC32_GETFLAGS               _IOR('f', 1, int)
#define EXT2_IOC32_SETFLAGS               _IOW('f', 2, int)
#define EXT3_IOC32_GETVERSION             _IOR('f', 3, int)
#define EXT3_IOC32_SETVERSION             _IOW('f', 4, int)
#define EXT3_IOC32_GETRSVSZ               _IOR('f', 5, int)
#define EXT3_IOC32_SETRSVSZ               _IOW('f', 6, int)
#define EXT3_IOC32_GROUP_EXTEND           _IOW('f', 7, unsigned int)
#ifdef CONFIG_JBD_DEBUG
#define EXT3_IOC32_WAIT_FOR_READONLY      _IOR('f', 99, int)
#endif

#define EXT2_IOC32_GETVERSION             _IOR('v', 1, int)
#define EXT2_IOC32_SETVERSION             _IOW('v', 2, int)

static int do_ioctl32_pointer(unsigned int fd, unsigned int cmd,
			      unsigned long arg, struct file *f)
{
	return sys_ioctl(fd, cmd, (unsigned long)compat_ptr(arg));
}

static int w_long(unsigned int fd, unsigned int cmd, unsigned long arg)
{
	mm_segment_t old_fs = get_fs();
	int err;
	unsigned long val;
	
	set_fs (KERNEL_DS);
	err = sys_ioctl(fd, cmd, (unsigned long)&val);
	set_fs (old_fs);
	if (!err && put_user(val, (u32 __user *)compat_ptr(arg)))
		return -EFAULT;
	return err;
}
 
static int rw_long(unsigned int fd, unsigned int cmd, unsigned long arg)
{
	mm_segment_t old_fs = get_fs();
	u32 __user *argptr = compat_ptr(arg);
	int err;
	unsigned long val;
	
	if(get_user(val, argptr))
		return -EFAULT;
	set_fs (KERNEL_DS);
	err = sys_ioctl(fd, cmd, (unsigned long)&val);
	set_fs (old_fs);
	if (!err && put_user(val, argptr))
		return -EFAULT;
	return err;
}

static int do_ext2_ioctl(unsigned int fd, unsigned int cmd, unsigned long arg)
{
	/* These are just misnamed, they actually get/put from/to user an int */
	switch (cmd) {
	case EXT2_IOC32_GETFLAGS: cmd = EXT2_IOC_GETFLAGS; break;
	case EXT2_IOC32_SETFLAGS: cmd = EXT2_IOC_SETFLAGS; break;
	case EXT2_IOC32_GETVERSION: cmd = EXT2_IOC_GETVERSION; break;
	case EXT2_IOC32_SETVERSION: cmd = EXT2_IOC_SETVERSION; break;
	}
	return sys_ioctl(fd, cmd, (unsigned long)compat_ptr(arg));
}

static int do_ext3_ioctl(unsigned int fd, unsigned int cmd, unsigned long arg)
{
	/* These are just misnamed, they actually get/put from/to user an int */
	switch (cmd) {
	case EXT3_IOC32_GETVERSION: cmd = EXT3_IOC_GETVERSION; break;
	case EXT3_IOC32_SETVERSION: cmd = EXT3_IOC_SETVERSION; break;
	case EXT3_IOC32_GETRSVSZ: cmd = EXT3_IOC_GETRSVSZ; break;
	case EXT3_IOC32_SETRSVSZ: cmd = EXT3_IOC_SETRSVSZ; break;
	case EXT3_IOC32_GROUP_EXTEND: cmd = EXT3_IOC_GROUP_EXTEND; break;
#ifdef CONFIG_JBD_DEBUG
	case EXT3_IOC32_WAIT_FOR_READONLY: cmd = EXT3_IOC_WAIT_FOR_READONLY; break;
#endif
	}
	return sys_ioctl(fd, cmd, (unsigned long)compat_ptr(arg));
}

struct compat_dmx_event {
	dmx_event_t	event;
	compat_time_t	timeStamp;
	union
	{
		dmx_scrambling_status_t scrambling;
	} u;
};

static int do_dmx_get_event(unsigned int fd, unsigned int cmd, unsigned long arg)
{
	struct dmx_event kevent;
	mm_segment_t old_fs = get_fs();
	int err;

	set_fs(KERNEL_DS);
	err = sys_ioctl(fd, cmd, (unsigned long) &kevent);
	set_fs(old_fs);

	if (!err) {
		struct compat_dmx_event __user *up = compat_ptr(arg);

		err  = put_user(kevent.event, &up->event);
		err |= put_user(kevent.timeStamp, &up->timeStamp);
		err |= put_user(kevent.u.scrambling, &up->u.scrambling);
		if (err)
			err = -EFAULT;
	}

	return err;
}

struct compat_video_event {
	int32_t		type;
	compat_time_t	timestamp;
	union {
	        video_size_t size;
		unsigned int frame_rate;
	} u;
};

static int do_video_get_event(unsigned int fd, unsigned int cmd, unsigned long arg)
{
	struct video_event kevent;
	mm_segment_t old_fs = get_fs();
	int err;

	set_fs(KERNEL_DS);
	err = sys_ioctl(fd, cmd, (unsigned long) &kevent);
	set_fs(old_fs);

	if (!err) {
		struct compat_video_event __user *up = compat_ptr(arg);

		err  = put_user(kevent.type, &up->type);
		err |= put_user(kevent.timestamp, &up->timestamp);
		err |= put_user(kevent.u.size.w, &up->u.size.w);
		err |= put_user(kevent.u.size.h, &up->u.size.h);
		err |= put_user(kevent.u.size.aspect_ratio,
				&up->u.size.aspect_ratio);
		if (err)
			err = -EFAULT;
	}

	return err;
}

struct compat_video_still_picture {
        compat_uptr_t iFrame;
        int32_t size;
};

static int do_video_stillpicture(unsigned int fd, unsigned int cmd, unsigned long arg)
{
	struct compat_video_still_picture __user *up;
	struct video_still_picture __user *up_native;
	compat_uptr_t fp;
	int32_t size;
	int err;

	up = (struct compat_video_still_picture __user *) arg;
	err  = get_user(fp, &up->iFrame);
	err |= get_user(size, &up->size);
	if (err)
		return -EFAULT;

	up_native =
		compat_alloc_user_space(sizeof(struct video_still_picture));

	put_user(compat_ptr(fp), &up_native->iFrame);
	put_user(size, &up_native->size);

	err = sys_ioctl(fd, cmd, (unsigned long) up_native);

	return err;
}

struct compat_video_spu_palette {
	int length;
	compat_uptr_t palette;
};

static int do_video_set_spu_palette(unsigned int fd, unsigned int cmd, unsigned long arg)
{
	struct compat_video_spu_palette __user *up;
	struct video_spu_palette __user *up_native;
	compat_uptr_t palp;
	int length, err;

	up = (struct compat_video_spu_palette __user *) arg;
	err  = get_user(palp, &up->palette);
	err |= get_user(length, &up->length);

	up_native = compat_alloc_user_space(sizeof(struct video_spu_palette));
	put_user(compat_ptr(palp), &up_native->palette);
	put_user(length, &up_native->length);

	err = sys_ioctl(fd, cmd, (unsigned long) up_native);

	return err;
}

#ifdef CONFIG_NET
static int do_siocgstamp(unsigned int fd, unsigned int cmd, unsigned long arg)
{
	struct compat_timeval __user *up = compat_ptr(arg);
	struct timeval ktv;
	mm_segment_t old_fs = get_fs();
	int err;

	set_fs(KERNEL_DS);
	err = sys_ioctl(fd, cmd, (unsigned long)&ktv);
	set_fs(old_fs);
	if(!err) {
		err = put_user(ktv.tv_sec, &up->tv_sec);
		err |= __put_user(ktv.tv_usec, &up->tv_usec);
	}
	return err;
}

struct ifmap32 {
	compat_ulong_t mem_start;
	compat_ulong_t mem_end;
	unsigned short base_addr;
	unsigned char irq;
	unsigned char dma;
	unsigned char port;
};

struct ifreq32 {
#define IFHWADDRLEN     6
#define IFNAMSIZ        16
        union {
                char    ifrn_name[IFNAMSIZ];            /* if name, e.g. "en0" */
        } ifr_ifrn;
        union {
                struct  sockaddr ifru_addr;
                struct  sockaddr ifru_dstaddr;
                struct  sockaddr ifru_broadaddr;
                struct  sockaddr ifru_netmask;
                struct  sockaddr ifru_hwaddr;
                short   ifru_flags;
                compat_int_t     ifru_ivalue;
                compat_int_t     ifru_mtu;
                struct  ifmap32 ifru_map;
                char    ifru_slave[IFNAMSIZ];   /* Just fits the size */
		char	ifru_newname[IFNAMSIZ];
                compat_caddr_t ifru_data;
	    /* XXXX? ifru_settings should be here */
        } ifr_ifru;
};

struct ifconf32 {
        compat_int_t	ifc_len;                        /* size of buffer       */
        compat_caddr_t  ifcbuf;
};

static int dev_ifname32(unsigned int fd, unsigned int cmd, unsigned long arg)
{
	struct net_device *dev;
	struct ifreq32 ifr32;
	int err;

	if (copy_from_user(&ifr32, compat_ptr(arg), sizeof(ifr32)))
		return -EFAULT;

	dev = dev_get_by_index(ifr32.ifr_ifindex);
	if (!dev)
		return -ENODEV;

	strlcpy(ifr32.ifr_name, dev->name, sizeof(ifr32.ifr_name));
	dev_put(dev);
	
	err = copy_to_user(compat_ptr(arg), &ifr32, sizeof(ifr32));
	return (err ? -EFAULT : 0);
}

static int dev_ifconf(unsigned int fd, unsigned int cmd, unsigned long arg)
{
	struct ifconf32 ifc32;
	struct ifconf ifc;
	struct ifconf __user *uifc;
	struct ifreq32 __user *ifr32;
	struct ifreq __user *ifr;
	unsigned int i, j;
	int err;

	if (copy_from_user(&ifc32, compat_ptr(arg), sizeof(struct ifconf32)))
		return -EFAULT;

	if (ifc32.ifcbuf == 0) {
		ifc32.ifc_len = 0;
		ifc.ifc_len = 0;
		ifc.ifc_req = NULL;
		uifc = compat_alloc_user_space(sizeof(struct ifconf));
	} else {
		size_t len =((ifc32.ifc_len / sizeof (struct ifreq32)) + 1) *
			sizeof (struct ifreq);
		uifc = compat_alloc_user_space(sizeof(struct ifconf) + len);
		ifc.ifc_len = len;
		ifr = ifc.ifc_req = (void __user *)(uifc + 1);
		ifr32 = compat_ptr(ifc32.ifcbuf);
		for (i = 0; i < ifc32.ifc_len; i += sizeof (struct ifreq32)) {
			if (copy_in_user(ifr, ifr32, sizeof(struct ifreq32)))
				return -EFAULT;
			ifr++;
			ifr32++; 
		}
	}
	if (copy_to_user(uifc, &ifc, sizeof(struct ifconf)))
		return -EFAULT;

	err = sys_ioctl (fd, SIOCGIFCONF, (unsigned long)uifc);	
	if (err)
		return err;

	if (copy_from_user(&ifc, uifc, sizeof(struct ifconf))) 
		return -EFAULT;

	ifr = ifc.ifc_req;
	ifr32 = compat_ptr(ifc32.ifcbuf);
	for (i = 0, j = 0;
             i + sizeof (struct ifreq32) <= ifc32.ifc_len && j < ifc.ifc_len;
	     i += sizeof (struct ifreq32), j += sizeof (struct ifreq)) {
		if (copy_in_user(ifr32, ifr, sizeof (struct ifreq32)))
			return -EFAULT;
		ifr32++;
		ifr++;
	}

	if (ifc32.ifcbuf == 0) {
		/* Translate from 64-bit structure multiple to
		 * a 32-bit one.
		 */
		i = ifc.ifc_len;
		i = ((i / sizeof(struct ifreq)) * sizeof(struct ifreq32));
		ifc32.ifc_len = i;
	} else {
		ifc32.ifc_len = i;
	}
	if (copy_to_user(compat_ptr(arg), &ifc32, sizeof(struct ifconf32)))
		return -EFAULT;

	return 0;
}

static int ethtool_ioctl(unsigned int fd, unsigned int cmd, unsigned long arg)
{
	struct ifreq __user *ifr;
	struct ifreq32 __user *ifr32;
	u32 data;
	void __user *datap;
	
	ifr = compat_alloc_user_space(sizeof(*ifr));
	ifr32 = compat_ptr(arg);

	if (copy_in_user(&ifr->ifr_name, &ifr32->ifr_name, IFNAMSIZ))
		return -EFAULT;

	if (get_user(data, &ifr32->ifr_ifru.ifru_data))
		return -EFAULT;

	datap = compat_ptr(data);
	if (put_user(datap, &ifr->ifr_ifru.ifru_data))
		return -EFAULT;

	return sys_ioctl(fd, cmd, (unsigned long) ifr);
}

static int bond_ioctl(unsigned int fd, unsigned int cmd, unsigned long arg)
{
	struct ifreq kifr;
	struct ifreq __user *uifr;
	struct ifreq32 __user *ifr32 = compat_ptr(arg);
	mm_segment_t old_fs;
	int err;
	u32 data;
	void __user *datap;

	switch (cmd) {
	case SIOCBONDENSLAVE:
	case SIOCBONDRELEASE:
	case SIOCBONDSETHWADDR:
	case SIOCBONDCHANGEACTIVE:
		if (copy_from_user(&kifr, ifr32, sizeof(struct ifreq32)))
			return -EFAULT;

		old_fs = get_fs();
		set_fs (KERNEL_DS);
		err = sys_ioctl (fd, cmd, (unsigned long)&kifr);
		set_fs (old_fs);

		return err;
	case SIOCBONDSLAVEINFOQUERY:
	case SIOCBONDINFOQUERY:
		uifr = compat_alloc_user_space(sizeof(*uifr));
		if (copy_in_user(&uifr->ifr_name, &ifr32->ifr_name, IFNAMSIZ))
			return -EFAULT;

		if (get_user(data, &ifr32->ifr_ifru.ifru_data))
			return -EFAULT;

		datap = compat_ptr(data);
		if (put_user(datap, &uifr->ifr_ifru.ifru_data))
			return -EFAULT;

		return sys_ioctl (fd, cmd, (unsigned long)uifr);
	default:
		return -EINVAL;
	};
}

int siocdevprivate_ioctl(unsigned int fd, unsigned int cmd, unsigned long arg)
{
	struct ifreq __user *u_ifreq64;
	struct ifreq32 __user *u_ifreq32 = compat_ptr(arg);
	char tmp_buf[IFNAMSIZ];
	void __user *data64;
	u32 data32;

	if (copy_from_user(&tmp_buf[0], &(u_ifreq32->ifr_ifrn.ifrn_name[0]),
			   IFNAMSIZ))
		return -EFAULT;
	if (__get_user(data32, &u_ifreq32->ifr_ifru.ifru_data))
		return -EFAULT;
	data64 = compat_ptr(data32);

	u_ifreq64 = compat_alloc_user_space(sizeof(*u_ifreq64));

	/* Don't check these user accesses, just let that get trapped
	 * in the ioctl handler instead.
	 */
	if (copy_to_user(&u_ifreq64->ifr_ifrn.ifrn_name[0], &tmp_buf[0],
			 IFNAMSIZ))
		return -EFAULT;
	if (__put_user(data64, &u_ifreq64->ifr_ifru.ifru_data))
		return -EFAULT;

	return sys_ioctl(fd, cmd, (unsigned long) u_ifreq64);
}

static int dev_ifsioc(unsigned int fd, unsigned int cmd, unsigned long arg)
{
	struct ifreq ifr;
	struct ifreq32 __user *uifr32;
	struct ifmap32 __user *uifmap32;
	mm_segment_t old_fs;
	int err;
	
	uifr32 = compat_ptr(arg);
	uifmap32 = &uifr32->ifr_ifru.ifru_map;
	switch (cmd) {
	case SIOCSIFMAP:
		err = copy_from_user(&ifr, uifr32, sizeof(ifr.ifr_name));
		err |= __get_user(ifr.ifr_map.mem_start, &uifmap32->mem_start);
		err |= __get_user(ifr.ifr_map.mem_end, &uifmap32->mem_end);
		err |= __get_user(ifr.ifr_map.base_addr, &uifmap32->base_addr);
		err |= __get_user(ifr.ifr_map.irq, &uifmap32->irq);
		err |= __get_user(ifr.ifr_map.dma, &uifmap32->dma);
		err |= __get_user(ifr.ifr_map.port, &uifmap32->port);
		if (err)
			return -EFAULT;
		break;
	default:
		if (copy_from_user(&ifr, uifr32, sizeof(*uifr32)))
			return -EFAULT;
		break;
	}
	old_fs = get_fs();
	set_fs (KERNEL_DS);
	err = sys_ioctl (fd, cmd, (unsigned long)&ifr);
	set_fs (old_fs);
	if (!err) {
		switch (cmd) {
		/* TUNSETIFF is defined as _IOW, it should be _IORW
		 * as the data is copied back to user space, but that
		 * cannot be fixed without breaking all existing apps.
		 */
		case TUNSETIFF:
		case SIOCGIFFLAGS:
		case SIOCGIFMETRIC:
		case SIOCGIFMTU:
		case SIOCGIFMEM:
		case SIOCGIFHWADDR:
		case SIOCGIFINDEX:
		case SIOCGIFADDR:
		case SIOCGIFBRDADDR:
		case SIOCGIFDSTADDR:
		case SIOCGIFNETMASK:
		case SIOCGIFTXQLEN:
			if (copy_to_user(uifr32, &ifr, sizeof(*uifr32)))
				return -EFAULT;
			break;
		case SIOCGIFMAP:
			err = copy_to_user(uifr32, &ifr, sizeof(ifr.ifr_name));
			err |= __put_user(ifr.ifr_map.mem_start, &uifmap32->mem_start);
			err |= __put_user(ifr.ifr_map.mem_end, &uifmap32->mem_end);
			err |= __put_user(ifr.ifr_map.base_addr, &uifmap32->base_addr);
			err |= __put_user(ifr.ifr_map.irq, &uifmap32->irq);
			err |= __put_user(ifr.ifr_map.dma, &uifmap32->dma);
			err |= __put_user(ifr.ifr_map.port, &uifmap32->port);
			if (err)
				err = -EFAULT;
			break;
		}
	}
	return err;
}

struct rtentry32 {
        u32   		rt_pad1;
        struct sockaddr rt_dst;         /* target address               */
        struct sockaddr rt_gateway;     /* gateway addr (RTF_GATEWAY)   */
        struct sockaddr rt_genmask;     /* target network mask (IP)     */
        unsigned short  rt_flags;
        short           rt_pad2;
        u32   		rt_pad3;
        unsigned char   rt_tos;
        unsigned char   rt_class;
        short           rt_pad4;
        short           rt_metric;      /* +1 for binary compatibility! */
        /* char * */ u32 rt_dev;        /* forcing the device at add    */
        u32   		rt_mtu;         /* per route MTU/Window         */
        u32   		rt_window;      /* Window clamping              */
        unsigned short  rt_irtt;        /* Initial RTT                  */

};

struct in6_rtmsg32 {
	struct in6_addr		rtmsg_dst;
	struct in6_addr		rtmsg_src;
	struct in6_addr		rtmsg_gateway;
	u32			rtmsg_type;
	u16			rtmsg_dst_len;
	u16			rtmsg_src_len;
	u32			rtmsg_metric;
	u32			rtmsg_info;
	u32			rtmsg_flags;
	s32			rtmsg_ifindex;
};

static int routing_ioctl(unsigned int fd, unsigned int cmd, unsigned long arg)
{
	int ret;
	void *r = NULL;
	struct in6_rtmsg r6;
	struct rtentry r4;
	char devname[16];
	u32 rtdev;
	mm_segment_t old_fs = get_fs();
	
	struct socket *mysock = sockfd_lookup(fd, &ret);

	if (mysock && mysock->sk && mysock->sk->sk_family == AF_INET6) { /* ipv6 */
		struct in6_rtmsg32 __user *ur6 = compat_ptr(arg);
		ret = copy_from_user (&r6.rtmsg_dst, &(ur6->rtmsg_dst),
			3 * sizeof(struct in6_addr));
		ret |= __get_user (r6.rtmsg_type, &(ur6->rtmsg_type));
		ret |= __get_user (r6.rtmsg_dst_len, &(ur6->rtmsg_dst_len));
		ret |= __get_user (r6.rtmsg_src_len, &(ur6->rtmsg_src_len));
		ret |= __get_user (r6.rtmsg_metric, &(ur6->rtmsg_metric));
		ret |= __get_user (r6.rtmsg_info, &(ur6->rtmsg_info));
		ret |= __get_user (r6.rtmsg_flags, &(ur6->rtmsg_flags));
		ret |= __get_user (r6.rtmsg_ifindex, &(ur6->rtmsg_ifindex));
		
		r = (void *) &r6;
	} else { /* ipv4 */
		struct rtentry32 __user *ur4 = compat_ptr(arg);
		ret = copy_from_user (&r4.rt_dst, &(ur4->rt_dst),
					3 * sizeof(struct sockaddr));
		ret |= __get_user (r4.rt_flags, &(ur4->rt_flags));
		ret |= __get_user (r4.rt_metric, &(ur4->rt_metric));
		ret |= __get_user (r4.rt_mtu, &(ur4->rt_mtu));
		ret |= __get_user (r4.rt_window, &(ur4->rt_window));
		ret |= __get_user (r4.rt_irtt, &(ur4->rt_irtt));
		ret |= __get_user (rtdev, &(ur4->rt_dev));
		if (rtdev) {
			ret |= copy_from_user (devname, compat_ptr(rtdev), 15);
			r4.rt_dev = devname; devname[15] = 0;
		} else
			r4.rt_dev = NULL;

		r = (void *) &r4;
	}

	if (ret) {
		ret = -EFAULT;
		goto out;
	}

	set_fs (KERNEL_DS);
	ret = sys_ioctl (fd, cmd, (unsigned long) r);
	set_fs (old_fs);

out:
	if (mysock)
		sockfd_put(mysock);

	return ret;
}
#endif

struct hd_geometry32 {
	unsigned char heads;
	unsigned char sectors;
	unsigned short cylinders;
	u32 start;
};
                        
static int hdio_getgeo(unsigned int fd, unsigned int cmd, unsigned long arg)
{
	mm_segment_t old_fs = get_fs();
	struct hd_geometry geo;
	struct hd_geometry32 __user *ugeo;
	int err;
	
	set_fs (KERNEL_DS);
	err = sys_ioctl(fd, HDIO_GETGEO, (unsigned long)&geo);
	set_fs (old_fs);
	ugeo = compat_ptr(arg);
	if (!err) {
		err = copy_to_user (ugeo, &geo, 4);
		err |= __put_user (geo.start, &ugeo->start);
	}
	return err ? -EFAULT : 0;
}

static int hdio_ioctl_trans(unsigned int fd, unsigned int cmd, unsigned long arg)
{
	mm_segment_t old_fs = get_fs();
	unsigned long kval;
	unsigned int __user *uvp;
	int error;

	set_fs(KERNEL_DS);
	error = sys_ioctl(fd, cmd, (long)&kval);
	set_fs(old_fs);

	if(error == 0) {
		uvp = compat_ptr(arg);
		if(put_user(kval, uvp))
			error = -EFAULT;
	}
	return error;
}


typedef struct sg_io_hdr32 {
	compat_int_t interface_id;	/* [i] 'S' for SCSI generic (required) */
	compat_int_t dxfer_direction;	/* [i] data transfer direction  */
	unsigned char cmd_len;		/* [i] SCSI command length ( <= 16 bytes) */
	unsigned char mx_sb_len;		/* [i] max length to write to sbp */
	unsigned short iovec_count;	/* [i] 0 implies no scatter gather */
	compat_uint_t dxfer_len;		/* [i] byte count of data transfer */
	compat_uint_t dxferp;		/* [i], [*io] points to data transfer memory
					      or scatter gather list */
	compat_uptr_t cmdp;		/* [i], [*i] points to command to perform */
	compat_uptr_t sbp;		/* [i], [*o] points to sense_buffer memory */
	compat_uint_t timeout;		/* [i] MAX_UINT->no timeout (unit: millisec) */
	compat_uint_t flags;		/* [i] 0 -> default, see SG_FLAG... */
	compat_int_t pack_id;		/* [i->o] unused internally (normally) */
	compat_uptr_t usr_ptr;		/* [i->o] unused internally */
	unsigned char status;		/* [o] scsi status */
	unsigned char masked_status;	/* [o] shifted, masked scsi status */
	unsigned char msg_status;		/* [o] messaging level data (optional) */
	unsigned char sb_len_wr;		/* [o] byte count actually written to sbp */
	unsigned short host_status;	/* [o] errors from host adapter */
	unsigned short driver_status;	/* [o] errors from software driver */
	compat_int_t resid;		/* [o] dxfer_len - actual_transferred */
	compat_uint_t duration;		/* [o] time taken by cmd (unit: millisec) */
	compat_uint_t info;		/* [o] auxiliary information */
} sg_io_hdr32_t;  /* 64 bytes long (on sparc32) */

typedef struct sg_iovec32 {
	compat_uint_t iov_base;
	compat_uint_t iov_len;
} sg_iovec32_t;

static int sg_build_iovec(sg_io_hdr_t __user *sgio, void __user *dxferp, u16 iovec_count)
{
	sg_iovec_t __user *iov = (sg_iovec_t __user *) (sgio + 1);
	sg_iovec32_t __user *iov32 = dxferp;
	int i;

	for (i = 0; i < iovec_count; i++) {
		u32 base, len;

		if (get_user(base, &iov32[i].iov_base) ||
		    get_user(len, &iov32[i].iov_len) ||
		    put_user(compat_ptr(base), &iov[i].iov_base) ||
		    put_user(len, &iov[i].iov_len))
			return -EFAULT;
	}

	if (put_user(iov, &sgio->dxferp))
		return -EFAULT;
	return 0;
}

static int sg_ioctl_trans(unsigned int fd, unsigned int cmd, unsigned long arg)
{
	sg_io_hdr_t __user *sgio;
	sg_io_hdr32_t __user *sgio32;
	u16 iovec_count;
	u32 data;
	void __user *dxferp;
	int err;

	sgio32 = compat_ptr(arg);
	if (get_user(iovec_count, &sgio32->iovec_count))
		return -EFAULT;

	{
		void __user *top = compat_alloc_user_space(0);
		void __user *new = compat_alloc_user_space(sizeof(sg_io_hdr_t) +
				       (iovec_count * sizeof(sg_iovec_t)));
		if (new > top)
			return -EINVAL;

		sgio = new;
	}

	/* Ok, now construct.  */
	if (copy_in_user(&sgio->interface_id, &sgio32->interface_id,
			 (2 * sizeof(int)) +
			 (2 * sizeof(unsigned char)) +
			 (1 * sizeof(unsigned short)) +
			 (1 * sizeof(unsigned int))))
		return -EFAULT;

	if (get_user(data, &sgio32->dxferp))
		return -EFAULT;
	dxferp = compat_ptr(data);
	if (iovec_count) {
		if (sg_build_iovec(sgio, dxferp, iovec_count))
			return -EFAULT;
	} else {
		if (put_user(dxferp, &sgio->dxferp))
			return -EFAULT;
	}

	{
		unsigned char __user *cmdp;
		unsigned char __user *sbp;

		if (get_user(data, &sgio32->cmdp))
			return -EFAULT;
		cmdp = compat_ptr(data);

		if (get_user(data, &sgio32->sbp))
			return -EFAULT;
		sbp = compat_ptr(data);

		if (put_user(cmdp, &sgio->cmdp) ||
		    put_user(sbp, &sgio->sbp))
			return -EFAULT;
	}

	if (copy_in_user(&sgio->timeout, &sgio32->timeout,
			 3 * sizeof(int)))
		return -EFAULT;

	if (get_user(data, &sgio32->usr_ptr))
		return -EFAULT;
	if (put_user(compat_ptr(data), &sgio->usr_ptr))
		return -EFAULT;

	if (copy_in_user(&sgio->status, &sgio32->status,
			 (4 * sizeof(unsigned char)) +
			 (2 * sizeof(unsigned (short))) +
			 (3 * sizeof(int))))
		return -EFAULT;

	err = sys_ioctl(fd, cmd, (unsigned long) sgio);

	if (err >= 0) {
		void __user *datap;

		if (copy_in_user(&sgio32->pack_id, &sgio->pack_id,
				 sizeof(int)) ||
		    get_user(datap, &sgio->usr_ptr) ||
		    put_user((u32)(unsigned long)datap,
			     &sgio32->usr_ptr) ||
		    copy_in_user(&sgio32->status, &sgio->status,
				 (4 * sizeof(unsigned char)) +
				 (2 * sizeof(unsigned short)) +
				 (3 * sizeof(int))))
			err = -EFAULT;
	}

	return err;
}

struct compat_sg_req_info { /* used by SG_GET_REQUEST_TABLE ioctl() */
	char req_state;
	char orphan;
	char sg_io_owned;
	char problem;
	int pack_id;
	compat_uptr_t usr_ptr;
	unsigned int duration;
	int unused;
};

static int sg_grt_trans(unsigned int fd, unsigned int cmd, unsigned long arg)
{
	int err, i;
	sg_req_info_t __user *r;
	struct compat_sg_req_info __user *o = (void __user *)arg;
	r = compat_alloc_user_space(sizeof(sg_req_info_t)*SG_MAX_QUEUE);
	err = sys_ioctl(fd,cmd,(unsigned long)r);
	if (err < 0)
		return err;
	for (i = 0; i < SG_MAX_QUEUE; i++) {
		void __user *ptr;
		int d;

		if (copy_in_user(o + i, r + i, offsetof(sg_req_info_t, usr_ptr)) ||
		    get_user(ptr, &r[i].usr_ptr) ||
		    get_user(d, &r[i].duration) ||
		    put_user((u32)(unsigned long)(ptr), &o[i].usr_ptr) ||
		    put_user(d, &o[i].duration))
			return -EFAULT;
	}
	return err;
}

struct sock_fprog32 {
	unsigned short	len;
	compat_caddr_t	filter;
};

#define PPPIOCSPASS32	_IOW('t', 71, struct sock_fprog32)
#define PPPIOCSACTIVE32	_IOW('t', 70, struct sock_fprog32)

static int ppp_sock_fprog_ioctl_trans(unsigned int fd, unsigned int cmd, unsigned long arg)
{
	struct sock_fprog32 __user *u_fprog32 = compat_ptr(arg);
	struct sock_fprog __user *u_fprog64 = compat_alloc_user_space(sizeof(struct sock_fprog));
	void __user *fptr64;
	u32 fptr32;
	u16 flen;

	if (get_user(flen, &u_fprog32->len) ||
	    get_user(fptr32, &u_fprog32->filter))
		return -EFAULT;

	fptr64 = compat_ptr(fptr32);

	if (put_user(flen, &u_fprog64->len) ||
	    put_user(fptr64, &u_fprog64->filter))
		return -EFAULT;

	if (cmd == PPPIOCSPASS32)
		cmd = PPPIOCSPASS;
	else
		cmd = PPPIOCSACTIVE;

	return sys_ioctl(fd, cmd, (unsigned long) u_fprog64);
}

struct ppp_option_data32 {
	compat_caddr_t	ptr;
	u32			length;
	compat_int_t		transmit;
};
#define PPPIOCSCOMPRESS32	_IOW('t', 77, struct ppp_option_data32)

struct ppp_idle32 {
	compat_time_t xmit_idle;
	compat_time_t recv_idle;
};
#define PPPIOCGIDLE32		_IOR('t', 63, struct ppp_idle32)

static int ppp_gidle(unsigned int fd, unsigned int cmd, unsigned long arg)
{
	struct ppp_idle __user *idle;
	struct ppp_idle32 __user *idle32;
	__kernel_time_t xmit, recv;
	int err;

	idle = compat_alloc_user_space(sizeof(*idle));
	idle32 = compat_ptr(arg);

	err = sys_ioctl(fd, PPPIOCGIDLE, (unsigned long) idle);

	if (!err) {
		if (get_user(xmit, &idle->xmit_idle) ||
		    get_user(recv, &idle->recv_idle) ||
		    put_user(xmit, &idle32->xmit_idle) ||
		    put_user(recv, &idle32->recv_idle))
			err = -EFAULT;
	}
	return err;
}

static int ppp_scompress(unsigned int fd, unsigned int cmd, unsigned long arg)
{
	struct ppp_option_data __user *odata;
	struct ppp_option_data32 __user *odata32;
	__u32 data;
	void __user *datap;

	odata = compat_alloc_user_space(sizeof(*odata));
	odata32 = compat_ptr(arg);

	if (get_user(data, &odata32->ptr))
		return -EFAULT;

	datap = compat_ptr(data);
	if (put_user(datap, &odata->ptr))
		return -EFAULT;

	if (copy_in_user(&odata->length, &odata32->length,
			 sizeof(__u32) + sizeof(int)))
		return -EFAULT;

	return sys_ioctl(fd, PPPIOCSCOMPRESS, (unsigned long) odata);
}

static int ppp_ioctl_trans(unsigned int fd, unsigned int cmd, unsigned long arg)
{
	int err;

	switch (cmd) {
	case PPPIOCGIDLE32:
		err = ppp_gidle(fd, cmd, arg);
		break;

	case PPPIOCSCOMPRESS32:
		err = ppp_scompress(fd, cmd, arg);
		break;

	default:
		do {
			static int count;
			if (++count <= 20)
				printk("ppp_ioctl: Unknown cmd fd(%d) "
				       "cmd(%08x) arg(%08x)\n",
				       (int)fd, (unsigned int)cmd, (unsigned int)arg);
		} while(0);
		err = -EINVAL;
		break;
	};

	return err;
}


struct mtget32 {
	compat_long_t	mt_type;
	compat_long_t	mt_resid;
	compat_long_t	mt_dsreg;
	compat_long_t	mt_gstat;
	compat_long_t	mt_erreg;
	compat_daddr_t	mt_fileno;
	compat_daddr_t	mt_blkno;
};
#define MTIOCGET32	_IOR('m', 2, struct mtget32)

struct mtpos32 {
	compat_long_t	mt_blkno;
};
#define MTIOCPOS32	_IOR('m', 3, struct mtpos32)

static int mt_ioctl_trans(unsigned int fd, unsigned int cmd, unsigned long arg)
{
	mm_segment_t old_fs = get_fs();
	struct mtget get;
	struct mtget32 __user *umget32;
	struct mtpos pos;
	struct mtpos32 __user *upos32;
	unsigned long kcmd;
	void *karg;
	int err = 0;

	switch(cmd) {
	case MTIOCPOS32:
		kcmd = MTIOCPOS;
		karg = &pos;
		break;
	case MTIOCGET32:
		kcmd = MTIOCGET;
		karg = &get;
		break;
	default:
		do {
			static int count;
			if (++count <= 20)
				printk("mt_ioctl: Unknown cmd fd(%d) "
				       "cmd(%08x) arg(%08x)\n",
				       (int)fd, (unsigned int)cmd, (unsigned int)arg);
		} while(0);
		return -EINVAL;
	}
	set_fs (KERNEL_DS);
	err = sys_ioctl (fd, kcmd, (unsigned long)karg);
	set_fs (old_fs);
	if (err)
		return err;
	switch (cmd) {
	case MTIOCPOS32:
		upos32 = compat_ptr(arg);
		err = __put_user(pos.mt_blkno, &upos32->mt_blkno);
		break;
	case MTIOCGET32:
		umget32 = compat_ptr(arg);
		err = __put_user(get.mt_type, &umget32->mt_type);
		err |= __put_user(get.mt_resid, &umget32->mt_resid);
		err |= __put_user(get.mt_dsreg, &umget32->mt_dsreg);
		err |= __put_user(get.mt_gstat, &umget32->mt_gstat);
		err |= __put_user(get.mt_erreg, &umget32->mt_erreg);
		err |= __put_user(get.mt_fileno, &umget32->mt_fileno);
		err |= __put_user(get.mt_blkno, &umget32->mt_blkno);
		break;
	}
	return err ? -EFAULT: 0;
}

struct cdrom_read_audio32 {
	union cdrom_addr	addr;
	u8			addr_format;
	compat_int_t		nframes;
	compat_caddr_t		buf;
};

struct cdrom_generic_command32 {
	unsigned char	cmd[CDROM_PACKET_SIZE];
	compat_caddr_t	buffer;
	compat_uint_t	buflen;
	compat_int_t	stat;
	compat_caddr_t	sense;
	unsigned char	data_direction;
	compat_int_t	quiet;
	compat_int_t	timeout;
	compat_caddr_t	reserved[1];
};
  
static int cdrom_do_read_audio(unsigned int fd, unsigned int cmd, unsigned long arg)
{
	struct cdrom_read_audio __user *cdread_audio;
	struct cdrom_read_audio32 __user *cdread_audio32;
	__u32 data;
	void __user *datap;

	cdread_audio = compat_alloc_user_space(sizeof(*cdread_audio));
	cdread_audio32 = compat_ptr(arg);

	if (copy_in_user(&cdread_audio->addr,
			 &cdread_audio32->addr,
			 (sizeof(*cdread_audio32) -
			  sizeof(compat_caddr_t))))
	 	return -EFAULT;

	if (get_user(data, &cdread_audio32->buf))
		return -EFAULT;
	datap = compat_ptr(data);
	if (put_user(datap, &cdread_audio->buf))
		return -EFAULT;

	return sys_ioctl(fd, cmd, (unsigned long) cdread_audio);
}

static int cdrom_do_generic_command(unsigned int fd, unsigned int cmd, unsigned long arg)
{
	struct cdrom_generic_command __user *cgc;
	struct cdrom_generic_command32 __user *cgc32;
	u32 data;
	unsigned char dir;
	int itmp;

	cgc = compat_alloc_user_space(sizeof(*cgc));
	cgc32 = compat_ptr(arg);

	if (copy_in_user(&cgc->cmd, &cgc32->cmd, sizeof(cgc->cmd)) ||
	    get_user(data, &cgc32->buffer) ||
	    put_user(compat_ptr(data), &cgc->buffer) ||
	    copy_in_user(&cgc->buflen, &cgc32->buflen,
			 (sizeof(unsigned int) + sizeof(int))) ||
	    get_user(data, &cgc32->sense) ||
	    put_user(compat_ptr(data), &cgc->sense) ||
	    get_user(dir, &cgc32->data_direction) ||
	    put_user(dir, &cgc->data_direction) ||
	    get_user(itmp, &cgc32->quiet) ||
	    put_user(itmp, &cgc->quiet) ||
	    get_user(itmp, &cgc32->timeout) ||
	    put_user(itmp, &cgc->timeout) ||
	    get_user(data, &cgc32->reserved[0]) ||
	    put_user(compat_ptr(data), &cgc->reserved[0]))
		return -EFAULT;

	return sys_ioctl(fd, cmd, (unsigned long) cgc);
}

static int cdrom_ioctl_trans(unsigned int fd, unsigned int cmd, unsigned long arg)
{
	int err;

	switch(cmd) {
	case CDROMREADAUDIO:
		err = cdrom_do_read_audio(fd, cmd, arg);
		break;

	case CDROM_SEND_PACKET:
		err = cdrom_do_generic_command(fd, cmd, arg);
		break;

	default:
		do {
			static int count;
			if (++count <= 20)
				printk("cdrom_ioctl: Unknown cmd fd(%d) "
				       "cmd(%08x) arg(%08x)\n",
				       (int)fd, (unsigned int)cmd, (unsigned int)arg);
		} while(0);
		err = -EINVAL;
		break;
	};

	return err;
}

struct loop_info32 {
	compat_int_t	lo_number;      /* ioctl r/o */
	compat_dev_t	lo_device;      /* ioctl r/o */
	compat_ulong_t	lo_inode;       /* ioctl r/o */
	compat_dev_t	lo_rdevice;     /* ioctl r/o */
	compat_int_t	lo_offset;
	compat_int_t	lo_encrypt_type;
	compat_int_t	lo_encrypt_key_size;    /* ioctl w/o */
	compat_int_t	lo_flags;       /* ioctl r/o */
	char		lo_name[LO_NAME_SIZE];
	unsigned char	lo_encrypt_key[LO_KEY_SIZE]; /* ioctl w/o */
	compat_ulong_t	lo_init[2];
	char		reserved[4];
};

static int loop_status(unsigned int fd, unsigned int cmd, unsigned long arg)
{
	mm_segment_t old_fs = get_fs();
	struct loop_info l;
	struct loop_info32 __user *ul;
	int err = -EINVAL;

	ul = compat_ptr(arg);
	switch(cmd) {
	case LOOP_SET_STATUS:
		err = get_user(l.lo_number, &ul->lo_number);
		err |= __get_user(l.lo_device, &ul->lo_device);
		err |= __get_user(l.lo_inode, &ul->lo_inode);
		err |= __get_user(l.lo_rdevice, &ul->lo_rdevice);
		err |= __copy_from_user(&l.lo_offset, &ul->lo_offset,
		        8 + (unsigned long)l.lo_init - (unsigned long)&l.lo_offset);
		if (err) {
			err = -EFAULT;
		} else {
			set_fs (KERNEL_DS);
			err = sys_ioctl (fd, cmd, (unsigned long)&l);
			set_fs (old_fs);
		}
		break;
	case LOOP_GET_STATUS:
		set_fs (KERNEL_DS);
		err = sys_ioctl (fd, cmd, (unsigned long)&l);
		set_fs (old_fs);
		if (!err) {
			err = put_user(l.lo_number, &ul->lo_number);
			err |= __put_user(l.lo_device, &ul->lo_device);
			err |= __put_user(l.lo_inode, &ul->lo_inode);
			err |= __put_user(l.lo_rdevice, &ul->lo_rdevice);
			err |= __copy_to_user(&ul->lo_offset, &l.lo_offset,
				(unsigned long)l.lo_init - (unsigned long)&l.lo_offset);
			if (err)
				err = -EFAULT;
		}
		break;
	default: {
		static int count;
		if (++count <= 20)
			printk("%s: Unknown loop ioctl cmd, fd(%d) "
			       "cmd(%08x) arg(%08lx)\n",
			       __FUNCTION__, fd, cmd, arg);
	}
	}
	return err;
}

extern int tty_ioctl(struct inode * inode, struct file * file, unsigned int cmd, unsigned long arg);

#ifdef CONFIG_VT

static int vt_check(struct file *file)
{
	struct tty_struct *tty;
	struct inode *inode = file->f_dentry->d_inode;
	
	if (file->f_op->ioctl != tty_ioctl)
		return -EINVAL;
	                
	tty = (struct tty_struct *)file->private_data;
	if (tty_paranoia_check(tty, inode, "tty_ioctl"))
		return -EINVAL;
	                                                
	if (tty->driver->ioctl != vt_ioctl)
		return -EINVAL;
	
	/*
	 * To have permissions to do most of the vt ioctls, we either have
	 * to be the owner of the tty, or super-user.
	 */
	if (current->signal->tty == tty || capable(CAP_SYS_ADMIN))
		return 1;
	return 0;                                                    
}

struct consolefontdesc32 {
	unsigned short charcount;       /* characters in font (256 or 512) */
	unsigned short charheight;      /* scan lines per character (1-32) */
	compat_caddr_t chardata;	/* font data in expanded form */
};

static int do_fontx_ioctl(unsigned int fd, unsigned int cmd, unsigned long arg, struct file *file)
{
	struct consolefontdesc32 __user *user_cfd = compat_ptr(arg);
	struct console_font_op op;
	compat_caddr_t data;
	int i, perm;

	perm = vt_check(file);
	if (perm < 0) return perm;
	
	switch (cmd) {
	case PIO_FONTX:
		if (!perm)
			return -EPERM;
		op.op = KD_FONT_OP_SET;
		op.flags = 0;
		op.width = 8;
		if (get_user(op.height, &user_cfd->charheight) ||
		    get_user(op.charcount, &user_cfd->charcount) ||
		    get_user(data, &user_cfd->chardata))
			return -EFAULT;
		op.data = compat_ptr(data);
		return con_font_op(vc_cons[fg_console].d, &op);
	case GIO_FONTX:
		op.op = KD_FONT_OP_GET;
		op.flags = 0;
		op.width = 8;
		if (get_user(op.height, &user_cfd->charheight) ||
		    get_user(op.charcount, &user_cfd->charcount) ||
		    get_user(data, &user_cfd->chardata))
			return -EFAULT;
		if (!data)
			return 0;
		op.data = compat_ptr(data);
		i = con_font_op(vc_cons[fg_console].d, &op);
		if (i)
			return i;
		if (put_user(op.height, &user_cfd->charheight) ||
		    put_user(op.charcount, &user_cfd->charcount) ||
		    put_user((compat_caddr_t)(unsigned long)op.data,
				&user_cfd->chardata))
			return -EFAULT;
		return 0;
	}
	return -EINVAL;
}

struct console_font_op32 {
	compat_uint_t op;        /* operation code KD_FONT_OP_* */
	compat_uint_t flags;     /* KD_FONT_FLAG_* */
	compat_uint_t width, height;     /* font size */
	compat_uint_t charcount;
	compat_caddr_t data;    /* font data with height fixed to 32 */
};
                                        
static int do_kdfontop_ioctl(unsigned int fd, unsigned int cmd, unsigned long arg, struct file *file)
{
	struct console_font_op op;
	struct console_font_op32 __user *fontop = compat_ptr(arg);
	int perm = vt_check(file), i;
	struct vc_data *vc;
	
	if (perm < 0) return perm;
	
	if (copy_from_user(&op, fontop, sizeof(struct console_font_op32)))
		return -EFAULT;
	if (!perm && op.op != KD_FONT_OP_GET)
		return -EPERM;
	op.data = compat_ptr(((struct console_font_op32 *)&op)->data);
	op.flags |= KD_FONT_FLAG_OLD;
	vc = ((struct tty_struct *)file->private_data)->driver_data;
	i = con_font_op(vc, &op);
	if (i)
		return i;
	((struct console_font_op32 *)&op)->data = (unsigned long)op.data;
	if (copy_to_user(fontop, &op, sizeof(struct console_font_op32)))
		return -EFAULT;
	return 0;
}

struct unimapdesc32 {
	unsigned short entry_ct;
	compat_caddr_t entries;
};

static int do_unimap_ioctl(unsigned int fd, unsigned int cmd, unsigned long arg, struct file *file)
{
	struct unimapdesc32 tmp;
	struct unimapdesc32 __user *user_ud = compat_ptr(arg);
	int perm = vt_check(file);
	
	if (perm < 0) return perm;
	if (copy_from_user(&tmp, user_ud, sizeof tmp))
		return -EFAULT;
	switch (cmd) {
	case PIO_UNIMAP:
		if (!perm) return -EPERM;
		return con_set_unimap(vc_cons[fg_console].d, tmp.entry_ct, compat_ptr(tmp.entries));
	case GIO_UNIMAP:
		return con_get_unimap(vc_cons[fg_console].d, tmp.entry_ct, &(user_ud->entry_ct), compat_ptr(tmp.entries));
	}
	return 0;
}

#endif /* CONFIG_VT */

static int do_smb_getmountuid(unsigned int fd, unsigned int cmd, unsigned long arg)
{
	mm_segment_t old_fs = get_fs();
	__kernel_uid_t kuid;
	int err;

	cmd = SMB_IOC_GETMOUNTUID;

	set_fs(KERNEL_DS);
	err = sys_ioctl(fd, cmd, (unsigned long)&kuid);
	set_fs(old_fs);

	if (err >= 0)
		err = put_user(kuid, (compat_uid_t __user *)compat_ptr(arg));

	return err;
}

struct atmif_sioc32 {
        compat_int_t	number;
        compat_int_t	length;
        compat_caddr_t	arg;
};

struct atm_iobuf32 {
	compat_int_t	length;
	compat_caddr_t	buffer;
};

#define ATM_GETLINKRATE32 _IOW('a', ATMIOC_ITF+1, struct atmif_sioc32)
#define ATM_GETNAMES32    _IOW('a', ATMIOC_ITF+3, struct atm_iobuf32)
#define ATM_GETTYPE32     _IOW('a', ATMIOC_ITF+4, struct atmif_sioc32)
#define ATM_GETESI32	  _IOW('a', ATMIOC_ITF+5, struct atmif_sioc32)
#define ATM_GETADDR32	  _IOW('a', ATMIOC_ITF+6, struct atmif_sioc32)
#define ATM_RSTADDR32	  _IOW('a', ATMIOC_ITF+7, struct atmif_sioc32)
#define ATM_ADDADDR32	  _IOW('a', ATMIOC_ITF+8, struct atmif_sioc32)
#define ATM_DELADDR32	  _IOW('a', ATMIOC_ITF+9, struct atmif_sioc32)
#define ATM_GETCIRANGE32  _IOW('a', ATMIOC_ITF+10, struct atmif_sioc32)
#define ATM_SETCIRANGE32  _IOW('a', ATMIOC_ITF+11, struct atmif_sioc32)
#define ATM_SETESI32      _IOW('a', ATMIOC_ITF+12, struct atmif_sioc32)
#define ATM_SETESIF32     _IOW('a', ATMIOC_ITF+13, struct atmif_sioc32)
#define ATM_GETSTAT32     _IOW('a', ATMIOC_SARCOM+0, struct atmif_sioc32)
#define ATM_GETSTATZ32    _IOW('a', ATMIOC_SARCOM+1, struct atmif_sioc32)
#define ATM_GETLOOP32	  _IOW('a', ATMIOC_SARCOM+2, struct atmif_sioc32)
#define ATM_SETLOOP32	  _IOW('a', ATMIOC_SARCOM+3, struct atmif_sioc32)
#define ATM_QUERYLOOP32	  _IOW('a', ATMIOC_SARCOM+4, struct atmif_sioc32)

static struct {
        unsigned int cmd32;
        unsigned int cmd;
} atm_ioctl_map[] = {
        { ATM_GETLINKRATE32, ATM_GETLINKRATE },
	{ ATM_GETNAMES32,    ATM_GETNAMES },
        { ATM_GETTYPE32,     ATM_GETTYPE },
        { ATM_GETESI32,      ATM_GETESI },
        { ATM_GETADDR32,     ATM_GETADDR },
        { ATM_RSTADDR32,     ATM_RSTADDR },
        { ATM_ADDADDR32,     ATM_ADDADDR },
        { ATM_DELADDR32,     ATM_DELADDR },
        { ATM_GETCIRANGE32,  ATM_GETCIRANGE },
	{ ATM_SETCIRANGE32,  ATM_SETCIRANGE },
	{ ATM_SETESI32,      ATM_SETESI },
	{ ATM_SETESIF32,     ATM_SETESIF },
	{ ATM_GETSTAT32,     ATM_GETSTAT },
	{ ATM_GETSTATZ32,    ATM_GETSTATZ },
	{ ATM_GETLOOP32,     ATM_GETLOOP },
	{ ATM_SETLOOP32,     ATM_SETLOOP },
	{ ATM_QUERYLOOP32,   ATM_QUERYLOOP }
};

#define NR_ATM_IOCTL ARRAY_SIZE(atm_ioctl_map)

static int do_atm_iobuf(unsigned int fd, unsigned int cmd, unsigned long arg)
{
	struct atm_iobuf   __user *iobuf;
	struct atm_iobuf32 __user *iobuf32;
	u32 data;
	void __user *datap;
	int len, err;

	iobuf = compat_alloc_user_space(sizeof(*iobuf));
	iobuf32 = compat_ptr(arg);

	if (get_user(len, &iobuf32->length) ||
	    get_user(data, &iobuf32->buffer))
		return -EFAULT;
	datap = compat_ptr(data);
	if (put_user(len, &iobuf->length) ||
	    put_user(datap, &iobuf->buffer))
		return -EFAULT;

	err = sys_ioctl(fd, cmd, (unsigned long)iobuf);

	if (!err) {
		if (copy_in_user(&iobuf32->length, &iobuf->length,
				 sizeof(int)))
			err = -EFAULT;
	}

	return err;
}

static int do_atmif_sioc(unsigned int fd, unsigned int cmd, unsigned long arg)
{
        struct atmif_sioc   __user *sioc;
	struct atmif_sioc32 __user *sioc32;
	u32 data;
	void __user *datap;
	int err;
        
	sioc = compat_alloc_user_space(sizeof(*sioc));
	sioc32 = compat_ptr(arg);

	if (copy_in_user(&sioc->number, &sioc32->number, 2 * sizeof(int)) ||
	    get_user(data, &sioc32->arg))
		return -EFAULT;
	datap = compat_ptr(data);
	if (put_user(datap, &sioc->arg))
		return -EFAULT;

	err = sys_ioctl(fd, cmd, (unsigned long) sioc);

	if (!err) {
		if (copy_in_user(&sioc32->length, &sioc->length,
				 sizeof(int)))
			err = -EFAULT;
	}
	return err;
}

static int do_atm_ioctl(unsigned int fd, unsigned int cmd32, unsigned long arg)
{
        int i;
        unsigned int cmd = 0;
        
	switch (cmd32) {
	case SONET_GETSTAT:
	case SONET_GETSTATZ:
	case SONET_GETDIAG:
	case SONET_SETDIAG:
	case SONET_CLRDIAG:
	case SONET_SETFRAMING:
	case SONET_GETFRAMING:
	case SONET_GETFRSENSE:
		return do_atmif_sioc(fd, cmd32, arg);
	}

	for (i = 0; i < NR_ATM_IOCTL; i++) {
		if (cmd32 == atm_ioctl_map[i].cmd32) {
			cmd = atm_ioctl_map[i].cmd;
			break;
		}
	}
	if (i == NR_ATM_IOCTL)
	        return -EINVAL;
        
        switch (cmd) {
	case ATM_GETNAMES:
		return do_atm_iobuf(fd, cmd, arg);
	    
	case ATM_GETLINKRATE:
        case ATM_GETTYPE:
        case ATM_GETESI:
        case ATM_GETADDR:
        case ATM_RSTADDR:
        case ATM_ADDADDR:
        case ATM_DELADDR:
        case ATM_GETCIRANGE:
	case ATM_SETCIRANGE:
	case ATM_SETESI:
	case ATM_SETESIF:
	case ATM_GETSTAT:
	case ATM_GETSTATZ:
	case ATM_GETLOOP:
	case ATM_SETLOOP:
	case ATM_QUERYLOOP:
                return do_atmif_sioc(fd, cmd, arg);
        }

        return -EINVAL;
}

static __attribute_used__ int 
ret_einval(unsigned int fd, unsigned int cmd, unsigned long arg)
{
	return -EINVAL;
}

static int broken_blkgetsize(unsigned int fd, unsigned int cmd, unsigned long arg)
{
	/* The mkswap binary hard codes it to Intel value :-((( */
	return w_long(fd, BLKGETSIZE, arg);
}

struct blkpg_ioctl_arg32 {
	compat_int_t op;
	compat_int_t flags;
	compat_int_t datalen;
	compat_caddr_t data;
};

static int blkpg_ioctl_trans(unsigned int fd, unsigned int cmd, unsigned long arg)
{
	struct blkpg_ioctl_arg32 __user *ua32 = compat_ptr(arg);
	struct blkpg_ioctl_arg __user *a = compat_alloc_user_space(sizeof(*a));
	compat_caddr_t udata;
	compat_int_t n;
	int err;
	
	err = get_user(n, &ua32->op);
	err |= put_user(n, &a->op);
	err |= get_user(n, &ua32->flags);
	err |= put_user(n, &a->flags);
	err |= get_user(n, &ua32->datalen);
	err |= put_user(n, &a->datalen);
	err |= get_user(udata, &ua32->data);