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linux/drivers/media/video/v4l2-compat-ioctl32.c
Hans Verkuil a45c0ad51d [media] v4l2: add VIDIOC_(TRY_)DECODER_CMD 
As discussed during the 2011 V4L-DVB workshop, the API in dvb/video.h should
be replaced by a proper V4L2 API. This patch turns the VIDEO_(TRY_)DECODER_CMD
ioctls into proper V4L2 ioctls.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-02-14 13:41:42 -02:00

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/*
* 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@ucw.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>
#include <linux/videodev2.h>
#include <linux/module.h>
#include <media/v4l2-ioctl.h>
#ifdef CONFIG_COMPAT
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);
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(kp->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 get_v4l2_pix_format_mplane(struct v4l2_pix_format_mplane *kp,
struct v4l2_pix_format_mplane __user *up)
{
if (copy_from_user(kp, up, sizeof(struct v4l2_pix_format_mplane)))
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 put_v4l2_pix_format_mplane(struct v4l2_pix_format_mplane *kp,
struct v4l2_pix_format_mplane __user *up)
{
if (copy_to_user(up, kp, sizeof(struct v4l2_pix_format_mplane)))
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_pix_format_mplane pix_mp;
struct v4l2_window32 win;
struct v4l2_vbi_format vbi;
struct v4l2_sliced_vbi_format sliced;
__u8 raw_data[200]; /* user-defined */
} fmt;
};
/**
* struct v4l2_create_buffers32 - VIDIOC_CREATE_BUFS32 argument
* @index: on return, index of the first created buffer
* @count: entry: number of requested buffers,
* return: number of created buffers
* @memory: buffer memory type
* @format: frame format, for which buffers are requested
* @reserved: future extensions
*/
struct v4l2_create_buffers32 {
__u32 index;
__u32 count;
enum v4l2_memory memory;
struct v4l2_format32 format;
__u32 reserved[8];
};
static int __get_v4l2_format32(struct v4l2_format *kp, struct v4l2_format32 __user *up)
{
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_CAPTURE_MPLANE:
case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
return get_v4l2_pix_format_mplane(&kp->fmt.pix_mp,
&up->fmt.pix_mp);
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;
default:
printk(KERN_INFO "compat_ioctl32: unexpected VIDIOC_FMT type %d\n",
kp->type);
return -EINVAL;
}
}
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;
return __get_v4l2_format32(kp, up);
}
static int get_v4l2_create32(struct v4l2_create_buffers *kp, struct v4l2_create_buffers32 __user *up)
{
if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_create_buffers32)) ||
copy_from_user(kp, up, offsetof(struct v4l2_create_buffers32, format.fmt)))
return -EFAULT;
return __get_v4l2_format32(&kp->format, &up->format);
}
static int __put_v4l2_format32(struct v4l2_format *kp, struct v4l2_format32 __user *up)
{
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_CAPTURE_MPLANE:
case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
return put_v4l2_pix_format_mplane(&kp->fmt.pix_mp,
&up->fmt.pix_mp);
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;
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;
return __put_v4l2_format32(kp, up);
}
static int put_v4l2_create32(struct v4l2_create_buffers *kp, struct v4l2_create_buffers32 __user *up)
{
if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_create_buffers32)) ||
copy_to_user(up, kp, offsetof(struct v4l2_create_buffers32, format.fmt)))
return -EFAULT;
return __put_v4l2_format32(&kp->format, &up->format);
}
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_plane32 {
__u32 bytesused;
__u32 length;
union {
__u32 mem_offset;
compat_long_t userptr;
} m;
__u32 data_offset;
__u32 reserved[11];
};
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;
compat_caddr_t planes;
} m;
__u32 length;
__u32 input;
__u32 reserved;
};
static int get_v4l2_plane32(struct v4l2_plane *up, struct v4l2_plane32 *up32,
enum v4l2_memory memory)
{
void __user *up_pln;
compat_long_t p;
if (copy_in_user(up, up32, 2 * sizeof(__u32)) ||
copy_in_user(&up->data_offset, &up32->data_offset,
sizeof(__u32)))
return -EFAULT;
if (memory == V4L2_MEMORY_USERPTR) {
if (get_user(p, &up32->m.userptr))
return -EFAULT;
up_pln = compat_ptr(p);
if (put_user((unsigned long)up_pln, &up->m.userptr))
return -EFAULT;
} else {
if (copy_in_user(&up->m.mem_offset, &up32->m.mem_offset,
sizeof(__u32)))
return -EFAULT;
}
return 0;
}
static int put_v4l2_plane32(struct v4l2_plane *up, struct v4l2_plane32 *up32,
enum v4l2_memory memory)
{
if (copy_in_user(up32, up, 2 * sizeof(__u32)) ||
copy_in_user(&up32->data_offset, &up->data_offset,
sizeof(__u32)))
return -EFAULT;
/* For MMAP, driver might've set up the offset, so copy it back.
* USERPTR stays the same (was userspace-provided), so no copying. */
if (memory == V4L2_MEMORY_MMAP)
if (copy_in_user(&up32->m.mem_offset, &up->m.mem_offset,
sizeof(__u32)))
return -EFAULT;
return 0;
}
static int get_v4l2_buffer32(struct v4l2_buffer *kp, struct v4l2_buffer32 __user *up)
{
struct v4l2_plane32 __user *uplane32;
struct v4l2_plane __user *uplane;
compat_caddr_t p;
int num_planes;
int ret;
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;
if (V4L2_TYPE_IS_OUTPUT(kp->type))
if (get_user(kp->bytesused, &up->bytesused) ||
get_user(kp->field, &up->field) ||
get_user(kp->timestamp.tv_sec, &up->timestamp.tv_sec) ||
get_user(kp->timestamp.tv_usec,
&up->timestamp.tv_usec))
return -EFAULT;
if (V4L2_TYPE_IS_MULTIPLANAR(kp->type)) {
if (get_user(kp->length, &up->length))
return -EFAULT;
num_planes = kp->length;
if (num_planes == 0) {
kp->m.planes = NULL;
/* num_planes == 0 is legal, e.g. when userspace doesn't
* need planes array on DQBUF*/
return 0;
}
if (get_user(p, &up->m.planes))
return -EFAULT;
uplane32 = compat_ptr(p);
if (!access_ok(VERIFY_READ, uplane32,
num_planes * sizeof(struct v4l2_plane32)))
return -EFAULT;
/* We don't really care if userspace decides to kill itself
* by passing a very big num_planes value */
uplane = compat_alloc_user_space(num_planes *
sizeof(struct v4l2_plane));
kp->m.planes = uplane;
while (--num_planes >= 0) {
ret = get_v4l2_plane32(uplane, uplane32, kp->memory);
if (ret)
return ret;
++uplane;
++uplane32;
}
} else {
switch (kp->memory) {
case V4L2_MEMORY_MMAP:
if (get_user(kp->length, &up->length) ||
get_user(kp->m.offset, &up->m.offset))
return -EFAULT;
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)
{
struct v4l2_plane32 __user *uplane32;
struct v4l2_plane __user *uplane;
compat_caddr_t p;
int num_planes;
int ret;
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;
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;
if (V4L2_TYPE_IS_MULTIPLANAR(kp->type)) {
num_planes = kp->length;
if (num_planes == 0)
return 0;
uplane = kp->m.planes;
if (get_user(p, &up->m.planes))
return -EFAULT;
uplane32 = compat_ptr(p);
while (--num_planes >= 0) {
ret = put_v4l2_plane32(uplane, uplane32, kp->memory);
if (ret)
return ret;
++uplane;
++uplane32;
}
} else {
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;
}
}
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 * */
};
struct v4l2_ext_control32 {
__u32 id;
__u32 size;
__u32 reserved2[1];
union {
__s32 value;
__s64 value64;
compat_caddr_t string; /* actually char * */
};
} __attribute__ ((packed));
/* The following function really belong in v4l2-common, but that causes
a circular dependency between modules. We need to think about this, but
for now this will do. */
/* Return non-zero if this control is a pointer type. Currently only
type STRING is a pointer type. */
static inline int ctrl_is_pointer(u32 id)
{
switch (id) {
case V4L2_CID_RDS_TX_PS_NAME:
case V4L2_CID_RDS_TX_RADIO_TEXT:
return 1;
default:
return 0;
}
}
static int get_v4l2_ext_controls32(struct v4l2_ext_controls *kp, struct v4l2_ext_controls32 __user *up)
{
struct v4l2_ext_control32 __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_control32)))
return -EFAULT;
kcontrols = compat_alloc_user_space(n * sizeof(struct v4l2_ext_control));
kp->controls = kcontrols;
while (--n >= 0) {
if (copy_in_user(kcontrols, ucontrols, sizeof(*ucontrols)))
return -EFAULT;
if (ctrl_is_pointer(kcontrols->id)) {
void __user *s;
if (get_user(p, &ucontrols->string))
return -EFAULT;
s = compat_ptr(p);
if (put_user(s, &kcontrols->string))
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_control32 __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_control32)))
return -EFAULT;
while (--n >= 0) {
unsigned size = sizeof(*ucontrols);
/* Do not modify the pointer when copying a pointer control.
The contents of the pointer was changed, not the pointer
itself. */
if (ctrl_is_pointer(kcontrols->id))
size -= sizeof(ucontrols->value64);
if (copy_in_user(ucontrols, kcontrols, size))
return -EFAULT;
ucontrols++;
kcontrols++;
}
return 0;
}
struct v4l2_event32 {
__u32 type;
union {
__u8 data[64];
} u;
__u32 pending;
__u32 sequence;
struct compat_timespec timestamp;
__u32 id;
__u32 reserved[8];
};
static int put_v4l2_event32(struct v4l2_event *kp, struct v4l2_event32 __user *up)
{
if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_event32)) ||
put_user(kp->type, &up->type) ||
copy_to_user(&up->u, &kp->u, sizeof(kp->u)) ||
put_user(kp->pending, &up->pending) ||
put_user(kp->sequence, &up->sequence) ||
put_compat_timespec(&kp->timestamp, &up->timestamp) ||
put_user(kp->id, &up->id) ||
copy_to_user(up->reserved, kp->reserved, 8 * sizeof(__u32)))
return -EFAULT;
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_DQEVENT32 _IOR ('V', 89, struct v4l2_event32)
#define VIDIOC_CREATE_BUFS32 _IOWR('V', 92, struct v4l2_create_buffers32)
#define VIDIOC_PREPARE_BUF32 _IOWR('V', 93, struct v4l2_buffer32)
#define VIDIOC_OVERLAY32 _IOW ('V', 14, s32)
#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 {
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;
struct v4l2_event v2ev;
struct v4l2_create_buffers v2crt;
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) {
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_DQEVENT32: cmd = VIDIOC_DQEVENT; break;
case VIDIOC_OVERLAY32: cmd = VIDIOC_OVERLAY; break;
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;
case VIDIOC_CREATE_BUFS32: cmd = VIDIOC_CREATE_BUFS; break;
case VIDIOC_PREPARE_BUF32: cmd = VIDIOC_PREPARE_BUF; break;
}
switch (cmd) {
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_CREATE_BUFS:
err = get_v4l2_create32(&karg.v2crt, up);
compatible_arg = 0;
break;
case VIDIOC_PREPARE_BUF:
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;
case VIDIOC_DQEVENT:
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) {
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_DQEVENT:
err = put_v4l2_event32(&karg.v2ev, up);
break;
case VIDIOC_G_FMT:
case VIDIOC_S_FMT:
case VIDIOC_TRY_FMT:
err = put_v4l2_format32(&karg.v2f, up);
break;
case VIDIOC_CREATE_BUFS:
err = put_v4l2_create32(&karg.v2crt, 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->unlocked_ioctl)
return ret;
switch (cmd) {
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_SELECTION:
case VIDIOC_S_SELECTION:
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_DECODER_CMD:
case VIDIOC_TRY_DECODER_CMD:
case VIDIOC_DBG_S_REGISTER:
case VIDIOC_DBG_G_REGISTER:
case VIDIOC_DBG_G_CHIP_IDENT:
case VIDIOC_S_HW_FREQ_SEEK:
case VIDIOC_ENUM_DV_PRESETS:
case VIDIOC_S_DV_PRESET:
case VIDIOC_G_DV_PRESET:
case VIDIOC_QUERY_DV_PRESET:
case VIDIOC_S_DV_TIMINGS:
case VIDIOC_G_DV_TIMINGS:
case VIDIOC_DQEVENT:
case VIDIOC_DQEVENT32:
case VIDIOC_SUBSCRIBE_EVENT:
case VIDIOC_UNSUBSCRIBE_EVENT:
case VIDIOC_CREATE_BUFS32:
case VIDIOC_PREPARE_BUF32:
ret = do_video_ioctl(file, cmd, arg);
break;
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");
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