drivers/media/video/v4l2-compat-ioctl32.c

/*
 * ioctl32.c: Conversion between 32bit and 64bit native ioctls.
 *	Separated from fs stuff by Arnd Bergmann <arnd@arndb.de>
 *
 * 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)
 * Copyright (C) 2005       Philippe De Muyter (phdm@macqel.be)
 * Copyright (C) 2008       Hans Verkuil <hverkuil@xs4all.nl>
 *
 * These routines maintain argument size conversion between 32bit and 64bit
 * ioctls.
 */

#include <linux/compat.h>
#define __OLD_VIDIOC_ /* To allow fixing old calls*/
#include <linux/videodev.h>
#include <linux/videodev2.h>
#include <linux/module.h>
#include <linux/smp_lock.h>
#include <media/v4l2-ioctl.h>

#ifdef CONFIG_COMPAT

#ifdef CONFIG_VIDEO_V4L1_COMPAT
struct video_tuner32 {
	compat_int_t tuner;
	char name[32];
	compat_ulong_t rangelow, rangehigh;
	u32 flags;	/* It is really u32 in videodev.h */
	u16 mode, signal;
};

static int get_video_tuner32(struct video_tuner *kp, struct video_tuner32 __user *up)
{
	if (!access_ok(VERIFY_READ, up, sizeof(struct video_tuner32)) ||
		get_user(kp->tuner, &up->tuner) ||
		copy_from_user(kp->name, up->name, 32) ||
		get_user(kp->rangelow, &up->rangelow) ||
		get_user(kp->rangehigh, &up->rangehigh) ||
		get_user(kp->flags, &up->flags) ||
		get_user(kp->mode, &up->mode) ||
		get_user(kp->signal, &up->signal))
		return -EFAULT;
	return 0;
}

static int put_video_tuner32(struct video_tuner *kp, struct video_tuner32 __user *up)
{
	if (!access_ok(VERIFY_WRITE, up, sizeof(struct video_tuner32)) ||
		put_user(kp->tuner, &up->tuner) ||
		copy_to_user(up->name, kp->name, 32) ||
		put_user(kp->rangelow, &up->rangelow) ||
		put_user(kp->rangehigh, &up->rangehigh) ||
		put_user(kp->flags, &up->flags) ||
		put_user(kp->mode, &up->mode) ||
		put_user(kp->signal, &up->signal))
			return -EFAULT;
	return 0;
}

struct video_buffer32 {
	compat_caddr_t base;
	compat_int_t height, width, depth, bytesperline;
};

static int get_video_buffer32(struct video_buffer *kp, struct video_buffer32 __user *up)
{
	u32 tmp;

	if (!access_ok(VERIFY_READ, up, sizeof(struct video_buffer32)) ||
		get_user(tmp, &up->base) ||
		get_user(kp->height, &up->height) ||
		get_user(kp->width, &up->width) ||
		get_user(kp->depth, &up->depth) ||
		get_user(kp->bytesperline, &up->bytesperline))
			return -EFAULT;

	/* This is actually a physical address stored
	 * as a void pointer.
	 */
	kp->base = (void *)(unsigned long) tmp;

	return 0;
}

static int put_video_buffer32(struct video_buffer *kp, struct video_buffer32 __user *up)
{
	u32 tmp = (u32)((unsigned long)kp->base);

	if (!access_ok(VERIFY_WRITE, up, sizeof(struct video_buffer32)) ||
		put_user(tmp, &up->base) ||
		put_user(kp->height, &up->height) ||
		put_user(kp->width, &up->width) ||
		put_user(kp->depth, &up->depth) ||
		put_user(kp->bytesperline, &up->bytesperline))
			return -EFAULT;
	return 0;
}

struct video_clip32 {
	s32 x, y, width, height;	/* It's really s32 in videodev.h */
	compat_caddr_t next;
};

struct video_window32 {
	u32 x, y, width, height, chromakey, flags;
	compat_caddr_t clips;
	compat_int_t clipcount;
};

static int get_video_window32(struct video_window *kp, struct video_window32 __user *up)
{
	struct video_clip __user *uclips;
	struct video_clip __user *kclips;
	compat_caddr_t p;
	int nclips;

	if (!access_ok(VERIFY_READ, up, sizeof(struct video_window32)))
		return -EFAULT;

	if (get_user(nclips, &up->clipcount))
		return -EFAULT;

	if (!access_ok(VERIFY_READ, up, sizeof(struct video_window32)) ||
	    get_user(kp->x, &up->x) ||
	    get_user(kp->y, &up->y) ||
	    get_user(kp->width, &up->width) ||
	    get_user(kp->height, &up->height) ||
	    get_user(kp->chromakey, &up->chromakey) ||
	    get_user(kp->flags, &up->flags) ||
	    get_user(kp->clipcount, &up->clipcount))
		return -EFAULT;

	nclips = kp->clipcount;
	kp->clips = NULL;

	if (nclips == 0)
		return 0;
	if (get_user(p, &up->clips))
		return -EFAULT;
	uclips = compat_ptr(p);

	/* If nclips < 0, then it is a clipping bitmap of size
	   VIDEO_CLIPMAP_SIZE */
	if (nclips < 0) {
		if (!access_ok(VERIFY_READ, uclips, VIDEO_CLIPMAP_SIZE))
			return -EFAULT;
		kp->clips = compat_alloc_user_space(VIDEO_CLIPMAP_SIZE);
		if (copy_in_user(kp->clips, uclips, VIDEO_CLIPMAP_SIZE))
			return -EFAULT;
		return 0;
	}

	/* Otherwise it is an array of video_clip structs. */
	if (!access_ok(VERIFY_READ, uclips, nclips * sizeof(struct video_clip)))
		return -EFAULT;

	kp->clips = compat_alloc_user_space(nclips * sizeof(struct video_clip));
	kclips = kp->clips;
	while (nclips--) {
		int err;

		err = copy_in_user(&kclips->x, &uclips->x, sizeof(kclips->x));
		err |= copy_in_user(&kclips->y, &uclips->y, sizeof(kclips->y));
		err |= copy_in_user(&kclips->width, &uclips->width, sizeof(kclips->width));
		err |= copy_in_user(&kclips->height, &uclips->height, sizeof(kclips->height));
		kclips->next = NULL;
		if (err)
			return -EFAULT;
		kclips++;
		uclips++;
	}
	return 0;
}

/* You get back everything except the clips... */
static int put_video_window32(struct video_window *kp, struct video_window32 __user *up)
{
	if (!access_ok(VERIFY_WRITE, up, sizeof(struct video_window32)) ||
		put_user(kp->x, &up->x) ||
		put_user(kp->y, &up->y) ||
		put_user(kp->width, &up->width) ||
		put_user(kp->height, &up->height) ||
		put_user(kp->chromakey, &up->chromakey) ||
		put_user(kp->flags, &up->flags) ||
		put_user(kp->clipcount, &up->clipcount))
			return -EFAULT;
	return 0;
}

struct video_code32 {
	char		loadwhat[16];	/* name or tag of file being passed */
	compat_int_t	datasize;
	unsigned char	*data;
};

static int get_microcode32(struct video_code *kp, struct video_code32 __user *up)
{
	if (!access_ok(VERIFY_READ, up, sizeof(struct video_code32)) ||
		copy_from_user(kp->loadwhat, up->loadwhat, sizeof(up->loadwhat)) ||
		get_user(kp->datasize, &up->datasize) ||
		copy_from_user(kp->data, up->data, up->datasize))
			return -EFAULT;
	return 0;
}

#define VIDIOCGTUNER32		_IOWR('v', 4, struct video_tuner32)
#define VIDIOCSTUNER32		_IOW('v', 5, struct video_tuner32)
#define VIDIOCGWIN32		_IOR('v', 9, struct video_window32)
#define VIDIOCSWIN32		_IOW('v', 10, struct video_window32)
#define VIDIOCGFBUF32		_IOR('v', 11, struct video_buffer32)
#define VIDIOCSFBUF32		_IOW('v', 12, struct video_buffer32)
#define VIDIOCGFREQ32		_IOR('v', 14, u32)
#define VIDIOCSFREQ32		_IOW('v', 15, u32)
#define VIDIOCSMICROCODE32	_IOW('v', 27, struct video_code32)

#define VIDIOCCAPTURE32		_IOW('v', 8, s32)
#define VIDIOCSYNC32		_IOW('v', 18, s32)
#define VIDIOCSWRITEMODE32	_IOW('v', 25, s32)

#endif

static long native_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
	long ret = -ENOIOCTLCMD;

	if (file->f_op->unlocked_ioctl)
		ret = file->f_op->unlocked_ioctl(file, cmd, arg);
	else if (file->f_op->ioctl) {
		lock_kernel();
		ret = file->f_op->ioctl(file->f_path.dentry->d_inode, file, cmd, arg);
		unlock_kernel();
	}

	return ret;
}


struct v4l2_clip32 {
	struct v4l2_rect        c;
	compat_caddr_t 		next;
};

struct v4l2_window32 {
	struct v4l2_rect        w;
	enum v4l2_field  	field;
	__u32			chromakey;
	compat_caddr_t		clips; /* actually struct v4l2_clip32 * */
	__u32			clipcount;
	compat_caddr_t		bitmap;
};

static int get_v4l2_window32(struct v4l2_window *kp, struct v4l2_window32 __user *up)
{
	if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_window32)) ||
		copy_from_user(&kp->w, &up->w, sizeof(up->w)) ||
		get_user(kp->field, &up->field) ||
		get_user(kp->chromakey, &up->chromakey) ||
		get_user(kp->clipcount, &up->clipcount))
			return -EFAULT;
	if (kp->clipcount > 2048)
		return -EINVAL;
	if (kp->clipcount) {
		struct v4l2_clip32 __user *uclips;
		struct v4l2_clip __user *kclips;
		int n = kp->clipcount;
		compat_caddr_t p;

		if (get_user(p, &up->clips))
			return -EFAULT;
		uclips = compat_ptr(p);
		kclips = compat_alloc_user_space(n * sizeof(struct v4l2_clip));
		kp->clips = kclips;
		while (--n >= 0) {
			if (copy_in_user(&kclips->c, &uclips->c, sizeof(uclips->c)))
				return -EFAULT;
			if (put_user(n ? kclips + 1 : NULL, &kclips->next))
				return -EFAULT;
			uclips += 1;
			kclips += 1;
		}
	} else
		kp->clips = NULL;
	return 0;
}

static int put_v4l2_window32(struct v4l2_window *kp, struct v4l2_window32 __user *up)
{
	if (copy_to_user(&up->w, &kp->w, sizeof(up->w)) ||
		put_user(kp->field, &up->field) ||
		put_user(kp->chromakey, &up->chromakey) ||
		put_user(kp->clipcount, &up->clipcount))
			return -EFAULT;
	return 0;
}

static inline int get_v4l2_pix_format(struct v4l2_pix_format *kp, struct v4l2_pix_format __user *up)
{
	if (copy_from_user(kp, up, sizeof(struct v4l2_pix_format)))
		return -EFAULT;
	return 0;
}

static inline int put_v4l2_pix_format(struct v4l2_pix_format *kp, struct v4l2_pix_format __user *up)
{
	if (copy_to_user(up, kp, sizeof(struct v4l2_pix_format)))
		return -EFAULT;
	return 0;
}

static inline int get_v4l2_vbi_format(struct v4l2_vbi_format *kp, struct v4l2_vbi_format __user *up)
{
	if (copy_from_user(kp, up, sizeof(struct v4l2_vbi_format)))
		return -EFAULT;
	return 0;
}

static inline int put_v4l2_vbi_format(struct v4l2_vbi_format *kp, struct v4l2_vbi_format __user *up)
{
	if (copy_to_user(up, kp, sizeof(struct v4l2_vbi_format)))
		return -EFAULT;
	return 0;
}

static inline int get_v4l2_sliced_vbi_format(struct v4l2_sliced_vbi_format *kp, struct v4l2_sliced_vbi_format __user *up)
{
	if (copy_from_user(kp, up, sizeof(struct v4l2_sliced_vbi_format)))
		return -EFAULT;
	return 0;
}

static inline int put_v4l2_sliced_vbi_format(struct v4l2_sliced_vbi_format *kp, struct v4l2_sliced_vbi_format __user *up)
{
	if (copy_to_user(up, kp, sizeof(struct v4l2_sliced_vbi_format)))
		return -EFAULT;
	return 0;
}

struct v4l2_format32 {
	enum v4l2_buf_type type;
	union {
		struct v4l2_pix_format	pix;
		struct v4l2_window32	win;
		struct v4l2_vbi_format	vbi;
		struct v4l2_sliced_vbi_format	sliced;
		__u8	raw_data[200];        /* user-defined */
	} fmt;
};

static int get_v4l2_format32(struct v4l2_format *kp, struct v4l2_format32 __user *up)
{
	if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_format32)) ||
			get_user(kp->type, &up->type))
			return -EFAULT;
	switch (kp->type) {
	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
		return get_v4l2_pix_format(&kp->fmt.pix, &up->fmt.pix);
	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
		return get_v4l2_window32(&kp->fmt.win, &up->fmt.win);
	case V4L2_BUF_TYPE_VBI_CAPTURE:
	case V4L2_BUF_TYPE_VBI_OUTPUT:
		return get_v4l2_vbi_format(&kp->fmt.vbi, &up->fmt.vbi);
	case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
	case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
		return get_v4l2_sliced_vbi_format(&kp->fmt.sliced, &up->fmt.sliced);
	case V4L2_BUF_TYPE_PRIVATE:
		if (copy_from_user(kp, up, sizeof(kp->fmt.raw_data)))
			return -EFAULT;
		return 0;
	case 0:
		return -EINVAL;
	default:
		printk(KERN_INFO "compat_ioctl32: unexpected VIDIOC_FMT type %d\n",
								kp->type);
		return -EINVAL;
	}
}

static int put_v4l2_format32(struct v4l2_format *kp, struct v4l2_format32 __user *up)
{
	if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_format32)) ||
		put_user(kp->type, &up->type))
		return -EFAULT;
	switch (kp->type) {
	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
		return put_v4l2_pix_format(&kp->fmt.pix, &up->fmt.pix);
	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
		return put_v4l2_window32(&kp->fmt.win, &up->fmt.win);
	case V4L2_BUF_TYPE_VBI_CAPTURE:
	case V4L2_BUF_TYPE_VBI_OUTPUT:
		return put_v4l2_vbi_format(&kp->fmt.vbi, &up->fmt.vbi);
	case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
	case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
		return put_v4l2_sliced_vbi_format(&kp->fmt.sliced, &up->fmt.sliced);
	case V4L2_BUF_TYPE_PRIVATE:
		if (copy_to_user(up, kp, sizeof(up->fmt.raw_data)))
			return -EFAULT;
		return 0;
	case 0:
		return -EINVAL;
	default:
		printk(KERN_INFO "compat_ioctl32: unexpected VIDIOC_FMT type %d\n",
								kp->type);
		return -EINVAL;
	}
}

struct v4l2_standard32 {
	__u32		     index;
	__u32		     id[2]; /* __u64 would get the alignment wrong */
	__u8		     name[24];
	struct v4l2_fract    frameperiod; /* Frames, not fields */
	__u32		     framelines;
	__u32		     reserved[4];
};

static int get_v4l2_standard32(struct v4l2_standard *kp, struct v4l2_standard32 __user *up)
{
	/* other fields are not set by the user, nor used by the driver */
	if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_standard32)) ||
		get_user(kp->index, &up->index))
		return -EFAULT;
	return 0;
}

static int put_v4l2_standard32(struct v4l2_standard *kp, struct v4l2_standard32 __user *up)
{
	if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_standard32)) ||
		put_user(kp->index, &up->index) ||
		copy_to_user(up->id, &kp->id, sizeof(__u64)) ||
		copy_to_user(up->name, kp->name, 24) ||
		copy_to_user(&up->frameperiod, &kp->frameperiod, sizeof(kp->frameperiod)) ||
		put_user(kp->framelines, &up->framelines) ||
		copy_to_user(up->reserved, kp->reserved, 4 * sizeof(__u32)))
			return -EFAULT;
	return 0;
}

struct v4l2_buffer32 {
	__u32			index;
	enum v4l2_buf_type      type;
	__u32			bytesused;
	__u32			flags;
	enum v4l2_field		field;
	struct compat_timeval	timestamp;
	struct v4l2_timecode	timecode;
	__u32			sequence;

	/* memory location */
	enum v4l2_memory        memory;
	union {
		__u32           offset;
		compat_long_t   userptr;
	} m;
	__u32			length;
	__u32			input;
	__u32			reserved;
};

static int get_v4l2_buffer32(struct v4l2_buffer *kp, struct v4l2_buffer32 __user *up)
{

	if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_buffer32)) ||
		get_user(kp->index, &up->index) ||
		get_user(kp->type, &up->type) ||
		get_user(kp->flags, &up->flags) ||
		get_user(kp->memory, &up->memory) ||
		get_user(kp->input, &up->input))
			return -EFAULT;
	switch (kp->memory) {
	case V4L2_MEMORY_MMAP:
		break;
	case V4L2_MEMORY_USERPTR:
		{
		compat_long_t tmp;

		if (get_user(kp->length, &up->length) ||
		    get_user(tmp, &up->m.userptr))
			return -EFAULT;

		kp->m.userptr = (unsigned long)compat_ptr(tmp);
		}
		break;
	case V4L2_MEMORY_OVERLAY:
		if (get_user(kp->m.offset, &up->m.offset))
			return -EFAULT;
		break;
	}
	return 0;
}

static int put_v4l2_buffer32(struct v4l2_buffer *kp, struct v4l2_buffer32 __user *up)
{
	if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_buffer32)) ||
		put_user(kp->index, &up->index) ||
		put_user(kp->type, &up->type) ||
		put_user(kp->flags, &up->flags) ||
		put_user(kp->memory, &up->memory) ||
		put_user(kp->input, &up->input))
			return -EFAULT;
	switch (kp->memory) {
	case V4L2_MEMORY_MMAP:
		if (put_user(kp->length, &up->length) ||
			put_user(kp->m.offset, &up->m.offset))
			return -EFAULT;
		break;
	case V4L2_MEMORY_USERPTR:
		if (put_user(kp->length, &up->length) ||
			put_user(kp->m.userptr, &up->m.userptr))
			return -EFAULT;
		break;
	case V4L2_MEMORY_OVERLAY:
		if (put_user(kp->m.offset, &up->m.offset))
			return -EFAULT;
		break;
	}
	if (put_user(kp->bytesused, &up->bytesused) ||
		put_user(kp->field, &up->field) ||
		put_user(kp->timestamp.tv_sec, &up->timestamp.tv_sec) ||
		put_user(kp->timestamp.tv_usec, &up->timestamp.tv_usec) ||
		copy_to_user(&up->timecode, &kp->timecode, sizeof(struct v4l2_timecode)) ||
		put_user(kp->sequence, &up->sequence) ||
		put_user(kp->reserved, &up->reserved))
			return -EFAULT;
	return 0;
}

struct v4l2_framebuffer32 {
	__u32			capability;
	__u32			flags;
	compat_caddr_t 		base;
	struct v4l2_pix_format	fmt;
};

static int get_v4l2_framebuffer32(struct v4l2_framebuffer *kp, struct v4l2_framebuffer32 __user *up)
{
	u32 tmp;

	if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_framebuffer32)) ||
		get_user(tmp, &up->base) ||
		get_user(kp->capability, &up->capability) ||
		get_user(kp->flags, &up->flags))
			return -EFAULT;
	kp->base = compat_ptr(tmp);
	get_v4l2_pix_format(&kp->fmt, &up->fmt);
	return 0;
}

static int put_v4l2_framebuffer32(struct v4l2_framebuffer *kp, struct v4l2_framebuffer32 __user *up)
{
	u32 tmp = (u32)((unsigned long)kp->base);

	if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_framebuffer32)) ||
		put_user(tmp, &up->base) ||
		put_user(kp->capability, &up->capability) ||
		put_user(kp->flags, &up->flags))
			return -EFAULT;
	put_v4l2_pix_format(&kp->fmt, &up->fmt);
	return 0;
}

struct v4l2_input32 {
	__u32	     index;		/*  Which input */
	__u8	     name[32];		/*  Label */
	__u32	     type;		/*  Type of input */
	__u32	     audioset;		/*  Associated audios (bitfield) */
	__u32        tuner;             /*  Associated tuner */
	v4l2_std_id  std;
	__u32	     status;
	__u32	     reserved[4];
} __attribute__ ((packed));

/* The 64-bit v4l2_input struct has extra padding at the end of the struct.
   Otherwise it is identical to the 32-bit version. */
static inline int get_v4l2_input32(struct v4l2_input *kp, struct v4l2_input32 __user *up)
{
	if (copy_from_user(kp, up, sizeof(struct v4l2_input32)))
		return -EFAULT;
	return 0;
}

static inline int put_v4l2_input32(struct v4l2_input *kp, struct v4l2_input32 __user *up)
{
	if (copy_to_user(up, kp, sizeof(struct v4l2_input32)))
		return -EFAULT;
	return 0;
}

struct v4l2_ext_controls32 {
       __u32 ctrl_class;
       __u32 count;
       __u32 error_idx;
       __u32 reserved[2];
       compat_caddr_t controls; /* actually struct v4l2_ext_control32 * */
};

static int get_v4l2_ext_controls32(struct v4l2_ext_controls *kp, struct v4l2_ext_controls32 __user *up)
{
	struct v4l2_ext_control __user *ucontrols;
	struct v4l2_ext_control __user *kcontrols;
	int n;
	compat_caddr_t p;

	if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_ext_controls32)) ||
		get_user(kp->ctrl_class, &up->ctrl_class) ||
		get_user(kp->count, &up->count) ||
		get_user(kp->error_idx, &up->error_idx) ||
		copy_from_user(kp->reserved, up->reserved, sizeof(kp->reserved)))
			return -EFAULT;
	n = kp->count;
	if (n == 0) {
		kp->controls = NULL;
		return 0;
	}
	if (get_user(p, &up->controls))
		return -EFAULT;
	ucontrols = compat_ptr(p);
	if (!access_ok(VERIFY_READ, ucontrols, n * sizeof(struct v4l2_ext_control)))
		return -EFAULT;
	kcontrols = compat_alloc_user_space(n * sizeof(struct v4l2_ext_control));
	kp->controls = kcontrols;
	while (--n >= 0) {
		if (copy_in_user(&kcontrols->id, &ucontrols->id, sizeof(__u32)))
			return -EFAULT;
		if (copy_in_user(&kcontrols->reserved2, &ucontrols->reserved2, sizeof(ucontrols->reserved2)))
			return -EFAULT;
		/* Note: if the void * part of the union ever becomes relevant
		   then we need to know the type of the control in order to do
		   the right thing here. Luckily, that is not yet an issue. */
		if (copy_in_user(&kcontrols->value, &ucontrols->value, sizeof(ucontrols->value)))
			return -EFAULT;
		ucontrols++;
		kcontrols++;
	}
	return 0;
}

static int put_v4l2_ext_controls32(struct v4l2_ext_controls *kp, struct v4l2_ext_controls32 __user *up)
{
	struct v4l2_ext_control __user *ucontrols;
	struct v4l2_ext_control __user *kcontrols = kp->controls;
	int n = kp->count;
	compat_caddr_t p;

	if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_ext_controls32)) ||
		put_user(kp->ctrl_class, &up->ctrl_class) ||
		put_user(kp->count, &up->count) ||
		put_user(kp->error_idx, &up->error_idx) ||
		copy_to_user(up->reserved, kp->reserved, sizeof(up->reserved)))
			return -EFAULT;
	if (!kp->count)
		return 0;

	if (get_user(p, &up->controls))
		return -EFAULT;
	ucontrols = compat_ptr(p);
	if (!access_ok(VERIFY_WRITE, ucontrols, n * sizeof(struct v4l2_ext_control)))
		return -EFAULT;

	while (--n >= 0) {
		if (copy_in_user(&ucontrols->id, &kcontrols->id, sizeof(__u32)))
			return -EFAULT;
		if (copy_in_user(&ucontrols->reserved2, &kcontrols->reserved2,
					sizeof(ucontrols->reserved2)))
			return -EFAULT;
		/* Note: if the void * part of the union ever becomes relevant
		   then we need to know the type of the control in order to do
		   the right thing here. Luckily, that is not yet an issue. */
		if (copy_in_user(&ucontrols->value, &kcontrols->value, sizeof(ucontrols->value)))
			return -EFAULT;
		ucontrols++;
		kcontrols++;
	}
	return 0;
}

#define VIDIOC_G_FMT32		_IOWR('V',  4, struct v4l2_format32)
#define VIDIOC_S_FMT32		_IOWR('V',  5, struct v4l2_format32)
#define VIDIOC_QUERYBUF32	_IOWR('V',  9, struct v4l2_buffer32)
#define VIDIOC_G_FBUF32		_IOR ('V', 10, struct v4l2_framebuffer32)
#define VIDIOC_S_FBUF32		_IOW ('V', 11, struct v4l2_framebuffer32)
#define VIDIOC_QBUF32		_IOWR('V', 15, struct v4l2_buffer32)
#define VIDIOC_DQBUF32		_IOWR('V', 17, struct v4l2_buffer32)
#define VIDIOC_ENUMSTD32	_IOWR('V', 25, struct v4l2_standard32)
#define VIDIOC_ENUMINPUT32	_IOWR('V', 26, struct v4l2_input32)
#define VIDIOC_TRY_FMT32      	_IOWR('V', 64, struct v4l2_format32)
#define VIDIOC_G_EXT_CTRLS32    _IOWR('V', 71, struct v4l2_ext_controls32)
#define VIDIOC_S_EXT_CTRLS32    _IOWR('V', 72, struct v4l2_ext_controls32)
#define VIDIOC_TRY_EXT_CTRLS32  _IOWR('V', 73, struct v4l2_ext_controls32)

#define VIDIOC_OVERLAY32	_IOW ('V', 14, s32)
#ifdef __OLD_VIDIOC_
#define VIDIOC_OVERLAY32_OLD	_IOWR('V', 14, s32)
#endif
#define VIDIOC_STREAMON32	_IOW ('V', 18, s32)
#define VIDIOC_STREAMOFF32	_IOW ('V', 19, s32)
#define VIDIOC_G_INPUT32	_IOR ('V', 38, s32)
#define VIDIOC_S_INPUT32	_IOWR('V', 39, s32)
#define VIDIOC_G_OUTPUT32	_IOR ('V', 46, s32)
#define VIDIOC_S_OUTPUT32	_IOWR('V', 47, s32)

static long do_video_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
	union {
#ifdef CONFIG_VIDEO_V4L1_COMPAT
		struct video_tuner vt;
		struct video_buffer vb;
		struct video_window vw;
		struct video_code vc;
		struct video_audio va;
#endif
		struct v4l2_format v2f;
		struct v4l2_buffer v2b;
		struct v4l2_framebuffer v2fb;
		struct v4l2_input v2i;
		struct v4l2_standard v2s;
		struct v4l2_ext_controls v2ecs;
		unsigned long vx;
		int vi;
	} karg;
	void __user *up = compat_ptr(arg);
	int compatible_arg = 1;
	long err = 0;

	/* First, convert the command. */
	switch (cmd) {
#ifdef CONFIG_VIDEO_V4L1_COMPAT
	case VIDIOCGTUNER32: cmd = VIDIOCGTUNER; break;
	case VIDIOCSTUNER32: cmd = VIDIOCSTUNER; break;
	case VIDIOCGWIN32: cmd = VIDIOCGWIN; break;
	case VIDIOCSWIN32: cmd = VIDIOCSWIN; break;
	case VIDIOCGFBUF32: cmd = VIDIOCGFBUF; break;
	case VIDIOCSFBUF32: cmd = VIDIOCSFBUF; break;
	case VIDIOCGFREQ32: cmd = VIDIOCGFREQ; break;
	case VIDIOCSFREQ32: cmd = VIDIOCSFREQ; break;
	case VIDIOCSMICROCODE32: cmd = VIDIOCSMICROCODE; break;
#endif
	case VIDIOC_G_FMT32: cmd = VIDIOC_G_FMT; break;
	case VIDIOC_S_FMT32: cmd = VIDIOC_S_FMT; break;
	case VIDIOC_QUERYBUF32: cmd = VIDIOC_QUERYBUF; break;
	case VIDIOC_G_FBUF32: cmd = VIDIOC_G_FBUF; break;
	case VIDIOC_S_FBUF32: cmd = VIDIOC_S_FBUF; break;
	case VIDIOC_QBUF32: cmd = VIDIOC_QBUF; break;
	case VIDIOC_DQBUF32: cmd = VIDIOC_DQBUF; break;
	case VIDIOC_ENUMSTD32: cmd = VIDIOC_ENUMSTD; break;
	case VIDIOC_ENUMINPUT32: cmd = VIDIOC_ENUMINPUT; break;
	case VIDIOC_TRY_FMT32: cmd = VIDIOC_TRY_FMT; break;
	case VIDIOC_G_EXT_CTRLS32: cmd = VIDIOC_G_EXT_CTRLS; break;
	case VIDIOC_S_EXT_CTRLS32: cmd = VIDIOC_S_EXT_CTRLS; break;
	case VIDIOC_TRY_EXT_CTRLS32: cmd = VIDIOC_TRY_EXT_CTRLS; break;
	case VIDIOC_OVERLAY32: cmd = VIDIOC_OVERLAY; break;
#ifdef __OLD_VIDIOC_
	case VIDIOC_OVERLAY32_OLD: cmd = VIDIOC_OVERLAY; break;
#endif
	case VIDIOC_STREAMON32: cmd = VIDIOC_STREAMON; break;
	case VIDIOC_STREAMOFF32: cmd = VIDIOC_STREAMOFF; break;
	case VIDIOC_G_INPUT32: cmd = VIDIOC_G_INPUT; break;
	case VIDIOC_S_INPUT32: cmd = VIDIOC_S_INPUT; break;
	case VIDIOC_G_OUTPUT32: cmd = VIDIOC_G_OUTPUT; break;
	case VIDIOC_S_OUTPUT32: cmd = VIDIOC_S_OUTPUT; break;
	}

	switch (cmd) {
#ifdef CONFIG_VIDEO_V4L1_COMPAT
	case VIDIOCSTUNER:
	case VIDIOCGTUNER:
		err = get_video_tuner32(&karg.vt, up);
		compatible_arg = 0;
		break;

	case VIDIOCSFBUF:
		err = get_video_buffer32(&karg.vb, up);
		compatible_arg = 0;
		break;

	case VIDIOCSWIN:
		err = get_video_window32(&karg.vw, up);
		compatible_arg = 0;
		break;

	case VIDIOCGWIN:
	case VIDIOCGFBUF:
	case VIDIOCGFREQ:
		compatible_arg = 0;
		break;

	case VIDIOCSMICROCODE:
		err = get_microcode32(&karg.vc, up);
		compatible_arg = 0;
		break;

	case VIDIOCSFREQ:
		err = get_user(karg.vx, (u32 __user *)up);
		compatible_arg = 0;
		break;

	case VIDIOCCAPTURE:
	case VIDIOCSYNC:
	case VIDIOCSWRITEMODE:
#endif
	case VIDIOC_OVERLAY:
	case VIDIOC_STREAMON:
	case VIDIOC_STREAMOFF:
	case VIDIOC_S_INPUT:
	case VIDIOC_S_OUTPUT:
		err = get_user(karg.vi, (s32 __user *)up);
		compatible_arg = 0;
		break;

	case VIDIOC_G_INPUT:
	case VIDIOC_G_OUTPUT:
		compatible_arg = 0;
		break;

	case VIDIOC_G_FMT:
	case VIDIOC_S_FMT:
	case VIDIOC_TRY_FMT:
		err = get_v4l2_format32(&karg.v2f, up);
		compatible_arg = 0;
		break;

	case VIDIOC_QUERYBUF:
	case VIDIOC_QBUF:
	case VIDIOC_DQBUF:
		err = get_v4l2_buffer32(&karg.v2b, up);
		compatible_arg = 0;
		break;

	case VIDIOC_S_FBUF:
		err = get_v4l2_framebuffer32(&karg.v2fb, up);
		compatible_arg = 0;
		break;

	case VIDIOC_G_FBUF:
		compatible_arg = 0;
		break;

	case VIDIOC_ENUMSTD:
		err = get_v4l2_standard32(&karg.v2s, up);
		compatible_arg = 0;
		break;

	case VIDIOC_ENUMINPUT:
		err = get_v4l2_input32(&karg.v2i, up);
		compatible_arg = 0;
		break;

	case VIDIOC_G_EXT_CTRLS:
	case VIDIOC_S_EXT_CTRLS:
	case VIDIOC_TRY_EXT_CTRLS:
		err = get_v4l2_ext_controls32(&karg.v2ecs, up);
		compatible_arg = 0;
		break;
	}
	if (err)
		return err;

	if (compatible_arg)
		err = native_ioctl(file, cmd, (unsigned long)up);
	else {
		mm_segment_t old_fs = get_fs();

		set_fs(KERNEL_DS);
		err = native_ioctl(file, cmd, (unsigned long)&karg);
		set_fs(old_fs);
	}

	/* Special case: even after an error we need to put the
	   results back for these ioctls since the error_idx will
	   contain information on which control failed. */
	switch (cmd) {
	case VIDIOC_G_EXT_CTRLS:
	case VIDIOC_S_EXT_CTRLS:
	case VIDIOC_TRY_EXT_CTRLS:
		if (put_v4l2_ext_controls32(&karg.v2ecs, up))
			err = -EFAULT;
		break;
	}
	if (err)
		return err;

	switch (cmd) {
#ifdef CONFIG_VIDEO_V4L1_COMPAT
	case VIDIOCGTUNER:
		err = put_video_tuner32(&karg.vt, up);
		break;

	case VIDIOCGWIN:
		err = put_video_window32(&karg.vw, up);
		break;

	case VIDIOCGFBUF:
		err = put_video_buffer32(&karg.vb, up);
		break;

	case VIDIOCGFREQ:
		err = put_user(((u32)karg.vx), (u32 __user *)up);
		break;
#endif
	case VIDIOC_S_INPUT:
	case VIDIOC_S_OUTPUT:
	case VIDIOC_G_INPUT:
	case VIDIOC_G_OUTPUT:
		err = put_user(((s32)karg.vi), (s32 __user *)up);
		break;

	case VIDIOC_G_FBUF:
		err = put_v4l2_framebuffer32(&karg.v2fb, up);
		break;

	case VIDIOC_G_FMT:
	case VIDIOC_S_FMT:
	case VIDIOC_TRY_FMT:
		err = put_v4l2_format32(&karg.v2f, up);
		break;

	case VIDIOC_QUERYBUF:
	case VIDIOC_QBUF:
	case VIDIOC_DQBUF:
		err = put_v4l2_buffer32(&karg.v2b, up);
		break;

	case VIDIOC_ENUMSTD:
		err = put_v4l2_standard32(&karg.v2s, up);
		break;

	case VIDIOC_ENUMINPUT:
		err = put_v4l2_input32(&karg.v2i, up);
		break;
	}
	return err;
}

long v4l2_compat_ioctl32(struct file *file, unsigned int cmd, unsigned long arg)
{
	long ret = -ENOIOCTLCMD;

	if (!file->f_op->ioctl && !file->f_op->unlocked_ioctl)
		return ret;

	switch (cmd) {
#ifdef CONFIG_VIDEO_V4L1_COMPAT
	case VIDIOCGCAP:
	case VIDIOCGCHAN:
	case VIDIOCSCHAN:
	case VIDIOCGTUNER32:
	case VIDIOCSTUNER32:
	case VIDIOCGPICT:
	case VIDIOCSPICT:
	case VIDIOCCAPTURE32:
	case VIDIOCGWIN32:
	case VIDIOCSWIN32:
	case VIDIOCGFBUF32:
	case VIDIOCSFBUF32:
	case VIDIOCKEY:
	case VIDIOCGFREQ32:
	case VIDIOCSFREQ32:
	case VIDIOCGAUDIO:
	case VIDIOCSAUDIO:
	case VIDIOCSYNC32:
	case VIDIOCMCAPTURE:
	case VIDIOCGMBUF:
	case VIDIOCGUNIT:
	case VIDIOCGCAPTURE:
	case VIDIOCSCAPTURE:
	case VIDIOCSPLAYMODE:
	case VIDIOCSWRITEMODE32:
	case VIDIOCGPLAYINFO:
	case VIDIOCSMICROCODE32:
	case VIDIOCGVBIFMT:
	case VIDIOCSVBIFMT:
#endif
#ifdef __OLD_VIDIOC_
	case VIDIOC_OVERLAY32_OLD:
	case VIDIOC_S_PARM_OLD:
	case VIDIOC_S_CTRL_OLD:
	case VIDIOC_G_AUDIO_OLD:
	case VIDIOC_G_AUDOUT_OLD:
	case VIDIOC_CROPCAP_OLD:
#endif
	case VIDIOC_QUERYCAP:
	case VIDIOC_RESERVED:
	case VIDIOC_ENUM_FMT:
	case VIDIOC_G_FMT32:
	case VIDIOC_S_FMT32:
	case VIDIOC_REQBUFS:
	case VIDIOC_QUERYBUF32:
	case VIDIOC_G_FBUF32:
	case VIDIOC_S_FBUF32:
	case VIDIOC_OVERLAY32:
	case VIDIOC_QBUF32:
	case VIDIOC_DQBUF32:
	case VIDIOC_STREAMON32:
	case VIDIOC_STREAMOFF32:
	case VIDIOC_G_PARM:
	case VIDIOC_S_PARM:
	case VIDIOC_G_STD:
	case VIDIOC_S_STD:
	case VIDIOC_ENUMSTD32:
	case VIDIOC_ENUMINPUT32:
	case VIDIOC_G_CTRL:
	case VIDIOC_S_CTRL:
	case VIDIOC_G_TUNER:
	case VIDIOC_S_TUNER:
	case VIDIOC_G_AUDIO:
	case VIDIOC_S_AUDIO:
	case VIDIOC_QUERYCTRL:
	case VIDIOC_QUERYMENU:
	case VIDIOC_G_INPUT32:
	case VIDIOC_S_INPUT32:
	case VIDIOC_G_OUTPUT32:
	case VIDIOC_S_OUTPUT32:
	case VIDIOC_ENUMOUTPUT:
	case VIDIOC_G_AUDOUT:
	case VIDIOC_S_AUDOUT:
	case VIDIOC_G_MODULATOR:
	case VIDIOC_S_MODULATOR:
	case VIDIOC_S_FREQUENCY:
	case VIDIOC_G_FREQUENCY:
	case VIDIOC_CROPCAP:
	case VIDIOC_G_CROP:
	case VIDIOC_S_CROP:
	case VIDIOC_G_JPEGCOMP:
	case VIDIOC_S_JPEGCOMP:
	case VIDIOC_QUERYSTD:
	case VIDIOC_TRY_FMT32:
	case VIDIOC_ENUMAUDIO:
	case VIDIOC_ENUMAUDOUT:
	case VIDIOC_G_PRIORITY:
	case VIDIOC_S_PRIORITY:
	case VIDIOC_G_SLICED_VBI_CAP:
	case VIDIOC_LOG_STATUS:
	case VIDIOC_G_EXT_CTRLS32:
	case VIDIOC_S_EXT_CTRLS32:
	case VIDIOC_TRY_EXT_CTRLS32:
	case VIDIOC_ENUM_FRAMESIZES:
	case VIDIOC_ENUM_FRAMEINTERVALS:
	case VIDIOC_G_ENC_INDEX:
	case VIDIOC_ENCODER_CMD:
	case VIDIOC_TRY_ENCODER_CMD:
	case VIDIOC_DBG_S_REGISTER:
	case VIDIOC_DBG_G_REGISTER:
	case VIDIOC_DBG_G_CHIP_IDENT:
	case VIDIOC_S_HW_FREQ_SEEK:
		ret = do_video_ioctl(file, cmd, arg);
		break;

#ifdef CONFIG_VIDEO_V4L1_COMPAT
	/* BTTV specific... */
	case _IOW('v',  BASE_VIDIOCPRIVATE+0, char [256]):
	case _IOR('v',  BASE_VIDIOCPRIVATE+1, char [256]):
	case _IOR('v' , BASE_VIDIOCPRIVATE+2, unsigned int):
	case _IOW('v' , BASE_VIDIOCPRIVATE+3, char [16]): /* struct bttv_pll_info */
	case _IOR('v' , BASE_VIDIOCPRIVATE+4, int):
	case _IOR('v' , BASE_VIDIOCPRIVATE+5, int):
	case _IOR('v' , BASE_VIDIOCPRIVATE+6, int):
	case _IOR('v' , BASE_VIDIOCPRIVATE+7, int):
		ret = native_ioctl(file, cmd, (unsigned long)compat_ptr(arg));
		break;
#endif
	default:
		printk(KERN_WARNING "compat_ioctl32: "
			"unknown ioctl '%c', dir=%d, #%d (0x%08x)\n",
			_IOC_TYPE(cmd), _IOC_DIR(cmd), _IOC_NR(cmd), cmd);
		break;
	}
	return ret;
}
EXPORT_SYMBOL_GPL(v4l2_compat_ioctl32);
#endif

MODULE_LICENSE("GPL");