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#include <linux/config.h>
#include <linux/compat.h>
#include <linux/videodev.h>
#include <linux/module.h>
#ifdef CONFIG_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)
{
int i;
if(get_user(kp->tuner, &up->tuner))
return -EFAULT;
for(i = 0; i < 32; i++)
__get_user(kp->name[i], &up->name[i]);
__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 0;
}
static int put_video_tuner32(struct video_tuner *kp, struct video_tuner32 __user *up)
{
int i;
if(put_user(kp->tuner, &up->tuner))
return -EFAULT;
for(i = 0; i < 32; i++)
__put_user(kp->name[i], &up->name[i]);
__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 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 (get_user(tmp, &up->base))
return -EFAULT;
/* This is actually a physical address stored
* as a void pointer.
*/
kp->base = (void *)(unsigned long) tmp;
__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 0;
}
static int put_video_buffer32(struct video_buffer *kp, struct video_buffer32 __user *up)
{
u32 tmp = (u32)((unsigned long)kp->base);
if(put_user(tmp, &up->base))
return -EFAULT;
__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 0;
}
struct video_clip32 {
s32 x, y, width, height; /* Its 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 native_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
int ret = -ENOIOCTLCMD;
if (file->f_ops->unlocked_ioctl)
ret = file->f_ops->unlocked_ioctl(file, cmd, arg);
else if (file->f_ops->ioctl) {
lock_kernel();
ret = file->f_ops->ioctl(file->f_dentry->d_inode, file, cmd, arg);
unlock_kernel();
}
return ret;
}
/* You get back everything except the clips... */
static int put_video_window32(struct video_window *kp, struct video_window32 __user *up)
{
if(put_user(kp->x, &up->x))
return -EFAULT;
__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 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)
enum {
MaxClips = (~0U-sizeof(struct video_window))/sizeof(struct video_clip)
};
static int do_set_window(struct file *file, unsigned int cmd, unsigned long arg)
{
struct video_window32 __user *up = compat_ptr(arg);
struct video_window __user *vw;
struct video_clip __user *p;
int nclips;
u32 n;
if (get_user(nclips, &up->clipcount))
return -EFAULT;
/* Peculiar interface... */
if (nclips < 0)
nclips = VIDEO_CLIPMAP_SIZE;
if (nclips > MaxClips)
return -ENOMEM;
vw = compat_alloc_user_space(sizeof(struct video_window) +
nclips * sizeof(struct video_clip));
p = nclips ? (struct video_clip __user *)(vw + 1) : NULL;
if (get_user(n, &up->x) || put_user(n, &vw->x) ||
get_user(n, &up->y) || put_user(n, &vw->y) ||
get_user(n, &up->width) || put_user(n, &vw->width) ||
get_user(n, &up->height) || put_user(n, &vw->height) ||
get_user(n, &up->chromakey) || put_user(n, &vw->chromakey) ||
get_user(n, &up->flags) || put_user(n, &vw->flags) ||
get_user(n, &up->clipcount) || put_user(n, &vw->clipcount) ||
get_user(n, &up->clips) || put_user(p, &vw->clips))
return -EFAULT;
if (nclips) {
struct video_clip32 __user *u = compat_ptr(n);
int i;
if (!u)
return -EINVAL;
for (i = 0; i < nclips; i++, u++, p++) {
s32 v;
if (get_user(v, &u->x) ||
put_user(v, &p->x) ||
get_user(v, &u->y) ||
put_user(v, &p->y) ||
get_user(v, &u->width) ||
put_user(v, &p->width) ||
get_user(v, &u->height) ||
put_user(v, &p->height) ||
put_user(NULL, &p->next))
return -EFAULT;
}
}
return native_ioctl(file, VIDIOCSWIN, (unsigned long)p);
}
static int do_video_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
union {
struct video_tuner vt;
struct video_buffer vb;
struct video_window vw;
unsigned long vx;
} karg;
mm_segment_t old_fs = get_fs();
void __user *up = compat_ptr(arg);
int err = 0;
/* First, convert the command. */
switch(cmd) {
case VIDIOCGTUNER32: cmd = VIDIOCGTUNER; break;
case VIDIOCSTUNER32: cmd = VIDIOCSTUNER; break;
case VIDIOCGWIN32: cmd = VIDIOCGWIN; break;
case VIDIOCGFBUF32: cmd = VIDIOCGFBUF; break;
case VIDIOCSFBUF32: cmd = VIDIOCSFBUF; break;
case VIDIOCGFREQ32: cmd = VIDIOCGFREQ; break;
case VIDIOCSFREQ32: cmd = VIDIOCSFREQ; break;
};
switch(cmd) {
case VIDIOCSTUNER:
case VIDIOCGTUNER:
err = get_video_tuner32(&karg.vt, up);
break;
case VIDIOCSFBUF:
err = get_video_buffer32(&karg.vb, up);
break;
case VIDIOCSFREQ:
err = get_user(karg.vx, (u32 __user *)up);
break;
};
if(err)
goto out;
set_fs(KERNEL_DS);
err = native_ioctl(file, cmd, (unsigned long)&karg);
set_fs(old_fs);
if(err == 0) {
switch(cmd) {
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;
};
}
out:
return err;
}
long v4l_compat_ioctl32(struct file *file, unsigned int cmd, unsigned long arg)
{
int ret = -ENOIOCTLCMD;
if (!file->f_ops->ioctl)
return ret;
switch (cmd) {
case VIDIOCSWIN32:
ret = do_set_window(file, cmd, arg);
break;
case VIDIOCGTUNER32:
case VIDIOCSTUNER32:
case VIDIOCGWIN32:
case VIDIOCGFBUF32:
case VIDIOCSFBUF32:
case VIDIOCGFREQ32:
case VIDIOCSFREQ32:
ret = do_video_ioctl(file, cmd, arg);
break;
/* Little v, the video4linux ioctls (conflict?) */
case VIDIOCGCAP:
case VIDIOCGCHAN:
case VIDIOCSCHAN:
case VIDIOCGPICT:
case VIDIOCSPICT:
case VIDIOCCAPTURE:
case VIDIOCKEY:
case VIDIOCGAUDIO:
case VIDIOCSAUDIO:
case VIDIOCSYNC:
case VIDIOCMCAPTURE:
case VIDIOCGMBUF:
case VIDIOCGUNIT:
case VIDIOCGCAPTURE:
case VIDIOCSCAPTURE:
/* 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;
return ret;
}
}
#else
long v4l_compat_ioctl32(struct file *file, unsigned int cmd, unsigned long arg)
{
return -ENOIOCTLCMD;
}
#endif
EXPORT_SYMBOL_GPL(v4l_compat_ioctl32);
MODULE_LICENSE("GPL");
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