Commit cf664a64 authored by Philippe De Muyter's avatar Philippe De Muyter Committed by Mauro Carvalho Chehab

V4L/DVB (3120): Adds 32-bit compatibility for v4l2 framegrabber ioctls.

- Adds 32-bit compatibility for v4l2 framegrabber ioctls.
Signed-off-by: default avatarPhilippe De Muyter <phdm@macqel.be>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@brturbo.com.br>
parent e8efb71d
/*
* 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)
*
* These routines maintain argument size conversion between 32bit and 64bit
* ioctls.
*/
#include <linux/config.h>
#include <linux/compat.h>
#include <linux/videodev.h>
#include <linux/videodev2.h>
#include <linux/module.h>
#include <linux/smp_lock.h>
......@@ -15,12 +30,9 @@ struct video_tuner32 {
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]);
__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);
......@@ -31,12 +43,9 @@ static int get_video_tuner32(struct video_tuner *kp, struct video_tuner32 __user
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]);
__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);
......@@ -123,6 +132,265 @@ static int put_video_window32(struct video_window *kp, struct video_window32 __u
return 0;
}
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 (copy_from_user(&kp->w, &up->w, sizeof(up->w)))
return -EFAULT;
__get_user(kp->field, &up->field);
__get_user(kp->chromakey, &up->chromakey);
__get_user(kp->clipcount, &up->clipcount);
if (kp->clipcount > 2048)
return -EINVAL;
if (kp->clipcount) {
struct v4l2_clip32 *uclips = compat_ptr(up->clips);
struct v4l2_clip *kclips;
int n = kp->clipcount;
kclips = compat_alloc_user_space(n * sizeof(struct v4l2_clip));
kp->clips = kclips;
while (--n >= 0) {
copy_from_user(&kclips->c, &uclips->c, sizeof(uclips->c));
kclips->next = n ? kclips + 1 : 0;
uclips += 1;
kclips += 1;
}
} else
kp->clips = 0;
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)))
return -EFAULT;
__put_user(kp->field, &up->field);
__put_user(kp->chromakey, &up->chromakey);
__put_user(kp->clipcount, &up->clipcount);
return 0;
}
static inline int get_v4l2_pix_format(struct v4l2_pix_format *kp, struct v4l2_pix_format __user *up)
{
return copy_from_user(kp, up, sizeof(struct v4l2_pix_format));
}
static inline int put_v4l2_pix_format(struct v4l2_pix_format *kp, struct v4l2_pix_format __user *up)
{
return copy_to_user(up, kp, sizeof(struct v4l2_pix_format));
}
static inline int get_v4l2_vbi_format(struct v4l2_vbi_format *kp, struct v4l2_vbi_format __user *up)
{
return copy_from_user(kp, up, sizeof(struct v4l2_vbi_format));
}
static inline int put_v4l2_vbi_format(struct v4l2_vbi_format *kp, struct v4l2_vbi_format __user *up)
{
return copy_to_user(up, kp, sizeof(struct v4l2_vbi_format));
}
struct v4l2_format32
{
enum v4l2_buf_type type;
union
{
struct v4l2_pix_format pix; // V4L2_BUF_TYPE_VIDEO_CAPTURE
struct v4l2_window32 win; // V4L2_BUF_TYPE_VIDEO_OVERLAY
struct v4l2_vbi_format vbi; // V4L2_BUF_TYPE_VBI_CAPTURE
__u8 raw_data[200]; // user-defined
} fmt;
};
static int get_v4l2_format32(struct v4l2_format *kp, struct v4l2_format32 __user *up)
{
if(get_user(kp->type, &up->type))
return -EFAULT;
switch (kp->type) {
case V4L2_BUF_TYPE_VIDEO_CAPTURE:
return get_v4l2_pix_format(&kp->fmt.pix, &up->fmt.pix);
case V4L2_BUF_TYPE_VIDEO_OVERLAY:
return get_v4l2_window32(&kp->fmt.win, &up->fmt.win);
case V4L2_BUF_TYPE_VBI_CAPTURE:
return get_v4l2_vbi_format(&kp->fmt.vbi, &up->fmt.vbi);
default:
printk("compat_ioctl : unexpected VIDIOC_FMT type %d\n",
kp->type);
return -ENXIO;
}
}
static int put_v4l2_format32(struct v4l2_format *kp, struct v4l2_format32 __user *up)
{
if(put_user(kp->type, &up->type))
return -EFAULT;
switch (kp->type) {
case V4L2_BUF_TYPE_VIDEO_CAPTURE:
return put_v4l2_pix_format(&kp->fmt.pix, &up->fmt.pix);
case V4L2_BUF_TYPE_VIDEO_OVERLAY:
return put_v4l2_window32(&kp->fmt.win, &up->fmt.win);
case V4L2_BUF_TYPE_VBI_CAPTURE:
return put_v4l2_vbi_format(&kp->fmt.vbi, &up->fmt.vbi);
default:
return -ENXIO;
}
}
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 */
return get_user(kp->index, &up->index);
}
static int put_v4l2_standard32(struct v4l2_standard *kp, struct v4l2_standard32 __user *up)
{
if(put_user(kp->index, &up->index))
return -EFAULT;
__copy_to_user(up->id, &kp->id, sizeof(__u64));
__copy_to_user(up->name, kp->name, 24);
__put_user(kp->frameperiod, &up->frameperiod);
__put_user(kp->framelines, &up->framelines);
__copy_to_user(up->reserved, kp->reserved, 4 * sizeof(__u32));
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 (get_user(kp->index, &up->index))
return -EFAULT;
__get_user(kp->type, &up->type);
__get_user(kp->flags, &up->flags);
__get_user(kp->memory, &up->memory);
__get_user(kp->input, &up->input);
switch(kp->memory) {
case V4L2_MEMORY_MMAP:
break;
case V4L2_MEMORY_USERPTR:
{
unsigned long tmp = (unsigned long)compat_ptr(up->m.userptr);
__get_user(kp->length, &up->length);
__get_user(kp->m.userptr, &tmp);
}
break;
case V4L2_MEMORY_OVERLAY:
__get_user(kp->m.offset, &up->m.offset);
break;
}
return 0;
}
static int put_v4l2_buffer32(struct v4l2_buffer *kp, struct v4l2_buffer32 __user *up)
{
if (put_user(kp->index, &up->index))
return -EFAULT;
__put_user(kp->type, &up->type);
__put_user(kp->flags, &up->flags);
__put_user(kp->memory, &up->memory);
__put_user(kp->input, &up->input);
switch(kp->memory) {
case V4L2_MEMORY_MMAP:
__put_user(kp->length, &up->length);
__put_user(kp->m.offset, &up->m.offset);
break;
case V4L2_MEMORY_USERPTR:
__put_user(kp->length, &up->length);
__put_user(kp->m.userptr, &up->m.userptr);
break;
case V4L2_MEMORY_OVERLAY:
__put_user(kp->m.offset, &up->m.offset);
break;
}
__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 0;
}
struct v4l2_framebuffer32
{
__u32 capability;
__u32 flags;
compat_caddr_t base;
struct v4l2_pix_format fmt;
};
static int put_v4l2_framebuffer32(struct v4l2_framebuffer *kp, struct v4l2_framebuffer32 __user *up)
{
u32 tmp = (u32)((unsigned long)kp->base);
if(put_user(tmp, &up->base))
return -EFAULT;
__put_user(kp->capability, &up->capability);
__put_user(kp->flags, &up->flags);
put_v4l2_pix_format(&kp->fmt, &up->fmt);
return 0;
}
struct v4l2_input32 /* identical layout, but different size */
{
__u32 index; /* Which input */
__u8 name[32]; /* Label */
__u32 type; /* Type of input */
__u32 audioset; /* Associated audios (bitfield) */
__u32 tuner; /* Associated tuner */
__u32 std[2]; /* __u64 would get the padding wrong */
__u32 status;
__u32 reserved[4];
};
#define VIDIOCGTUNER32 _IOWR('v',4, struct video_tuner32)
#define VIDIOCSTUNER32 _IOW('v',5, struct video_tuner32)
#define VIDIOCGWIN32 _IOR('v',9, struct video_window32)
......@@ -132,6 +400,24 @@ static int put_video_window32(struct video_window *kp, struct video_window32 __u
#define VIDIOCGFREQ32 _IOR('v',14, u32)
#define VIDIOCSFREQ32 _IOW('v',15, u32)
#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)
/* VIDIOC_OVERLAY is now _IOW, but was _IOWR */
#define VIDIOC_OVERLAY32 _IOWR ('V', 14, compat_int_t)
#define VIDIOC_QBUF32 _IOWR ('V', 15, struct v4l2_buffer32)
#define VIDIOC_DQBUF32 _IOWR ('V', 17, struct v4l2_buffer32)
#define VIDIOC_STREAMON32 _IOW ('V', 18, compat_int_t)
#define VIDIOC_STREAMOFF32 _IOW ('V', 19, compat_int_t)
#define VIDIOC_ENUMSTD32 _IOWR ('V', 25, struct v4l2_standard32)
#define VIDIOC_ENUMINPUT32 _IOWR ('V', 26, struct v4l2_input32)
/* VIDIOC_S_CTRL is now _IOWR, but was _IOW */
#define VIDIOC_S_CTRL32 _IOW ('V', 28, struct v4l2_control)
#define VIDIOC_G_INPUT32 _IOR ('V', 38, compat_int_t)
#define VIDIOC_S_INPUT32 _IOWR ('V', 39, compat_int_t)
#define VIDIOC_TRY_FMT32 _IOWR ('V', 64, struct v4l2_format32)
enum {
MaxClips = (~0U-sizeof(struct video_window))/sizeof(struct video_clip)
};
......@@ -198,10 +484,14 @@ static int do_video_ioctl(struct file *file, unsigned int cmd, unsigned long arg
struct video_tuner vt;
struct video_buffer vb;
struct video_window vw;
struct v4l2_format v2f;
struct v4l2_buffer v2b;
struct v4l2_framebuffer v2fb;
struct v4l2_standard v2s;
unsigned long vx;
} karg;
mm_segment_t old_fs = get_fs();
void __user *up = compat_ptr(arg);
int compatible_arg = 1;
int err = 0;
/* First, convert the command. */
......@@ -213,29 +503,82 @@ static int do_video_ioctl(struct file *file, unsigned int cmd, unsigned long arg
case VIDIOCSFBUF32: cmd = VIDIOCSFBUF; break;
case VIDIOCGFREQ32: cmd = VIDIOCGFREQ; break;
case VIDIOCSFREQ32: cmd = VIDIOCSFREQ; break;
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_QBUF32: cmd = VIDIOC_QBUF; break;
case VIDIOC_DQBUF32: cmd = VIDIOC_DQBUF; break;
case VIDIOC_STREAMON32: cmd = VIDIOC_STREAMON; break;
case VIDIOC_STREAMOFF32: cmd = VIDIOC_STREAMOFF; break;
case VIDIOC_G_FBUF32: cmd = VIDIOC_G_FBUF; break;
case VIDIOC_OVERLAY32: cmd = VIDIOC_OVERLAY; break;
case VIDIOC_ENUMSTD32: cmd = VIDIOC_ENUMSTD; break;
case VIDIOC_ENUMINPUT32: cmd = VIDIOC_ENUMINPUT; break;
case VIDIOC_S_CTRL32: cmd = VIDIOC_S_CTRL; break;
case VIDIOC_G_INPUT32: cmd = VIDIOC_G_INPUT; break;
case VIDIOC_S_INPUT32: cmd = VIDIOC_S_INPUT; break;
case VIDIOC_TRY_FMT32: cmd = VIDIOC_TRY_FMT; break;
};
switch(cmd) {
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 VIDIOCSFREQ:
case VIDIOC_S_INPUT:
case VIDIOC_OVERLAY:
err = get_user(karg.vx, (u32 __user *)up);
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_ENUMSTD:
err = get_v4l2_standard32(&karg.v2s, up);
compatible_arg = 0;
break;
case VIDIOCGWIN:
case VIDIOCGFBUF:
case VIDIOCGFREQ:
case VIDIOC_G_FBUF:
case VIDIOC_G_INPUT:
compatible_arg = 0;
if(err)
goto out;
if(compatible_arg)
err = sys_ioctl(fd, cmd, (unsigned long)up);
else {
mm_segment_t old_fs = get_fs();
set_fs(KERNEL_DS);
err = native_ioctl(file, cmd, (unsigned long)&karg);
err = sys_ioctl(fd, cmd, (unsigned long)&karg);
set_fs(old_fs);
}
if(err == 0) {
switch(cmd) {
case VIDIOCGTUNER:
......@@ -250,7 +593,28 @@ static int do_video_ioctl(struct file *file, unsigned int cmd, unsigned long arg
err = put_video_buffer32(&karg.vb, 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 VIDIOCGFREQ:
case VIDIOC_G_INPUT:
err = put_user(((u32)karg.vx), (u32 __user *)up);
break;
};
......
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