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[media] v4l: Add multi-planar ioctl handling code

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Add multi-planar API core ioctl handling and conversion functions.

[mchehab@redhat.com: CondingStyle fixup]
Signed-off-by: Pawel Osciak <p.osciak@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Reviewed-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Pawel Osciak 2010-12-23 04:15:27 -03:00 committed by Mauro Carvalho Chehab
parent f8f3914cf9
commit d14e6d76eb
2 changed files with 425 additions and 44 deletions
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453
drivers/media/video/v4l2-ioctl.c
View file

@ -428,20 +428,33 @@ static void dbgbuf(unsigned int cmd, struct video_device *vfd,
struct v4l2_buffer *p)
{
struct v4l2_timecode *tc = &p->timecode;
struct v4l2_plane *plane;
int i;
dbgarg(cmd, "%02ld:%02d:%02d.%08ld index=%d, type=%s, "
"bytesused=%d, flags=0x%08d, "
"field=%0d, sequence=%d, memory=%s, offset/userptr=0x%08lx, length=%d\n",
"flags=0x%08d, field=%0d, sequence=%d, memory=%s\n",
p->timestamp.tv_sec / 3600,
(int)(p->timestamp.tv_sec / 60) % 60,
(int)(p->timestamp.tv_sec % 60),
(long)p->timestamp.tv_usec,
p->index,
prt_names(p->type, v4l2_type_names),
p->bytesused, p->flags,
p->field, p->sequence,
prt_names(p->memory, v4l2_memory_names),
p->m.userptr, p->length);
p->flags, p->field, p->sequence,
prt_names(p->memory, v4l2_memory_names));
if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) {
for (i = 0; i < p->length; ++i) {
plane = &p->m.planes[i];
dbgarg2("plane %d: bytesused=%d, data_offset=0x%08x "
"offset/userptr=0x%08lx, length=%d\n",
i, plane->bytesused, plane->data_offset,
plane->m.userptr, plane->length);
}
} else {
dbgarg2("bytesused=%d, offset/userptr=0x%08lx, length=%d\n",
p->bytesused, p->m.userptr, p->length);
}
dbgarg2("timecode=%02d:%02d:%02d type=%d, "
"flags=0x%08d, frames=%d, userbits=0x%08x\n",
tc->hours, tc->minutes, tc->seconds,
@ -469,6 +482,27 @@ static inline void v4l_print_pix_fmt(struct video_device *vfd,
fmt->bytesperline, fmt->sizeimage, fmt->colorspace);
};
static inline void v4l_print_pix_fmt_mplane(struct video_device *vfd,
struct v4l2_pix_format_mplane *fmt)
{
int i;
dbgarg2("width=%d, height=%d, format=%c%c%c%c, field=%s, "
"colorspace=%d, num_planes=%d\n",
fmt->width, fmt->height,
(fmt->pixelformat & 0xff),
(fmt->pixelformat >> 8) & 0xff,
(fmt->pixelformat >> 16) & 0xff,
(fmt->pixelformat >> 24) & 0xff,
prt_names(fmt->field, v4l2_field_names),
fmt->colorspace, fmt->num_planes);
for (i = 0; i < fmt->num_planes; ++i)
dbgarg2("plane %d: bytesperline=%d sizeimage=%d\n", i,
fmt->plane_fmt[i].bytesperline,
fmt->plane_fmt[i].sizeimage);
}
static inline void v4l_print_ext_ctrls(unsigned int cmd,
struct video_device *vfd, struct v4l2_ext_controls *c, int show_vals)
{
@ -522,7 +556,12 @@ static int check_fmt(const struct v4l2_ioctl_ops *ops, enum v4l2_buf_type type)
switch (type) {
case V4L2_BUF_TYPE_VIDEO_CAPTURE:
if (ops->vidioc_g_fmt_vid_cap)
if (ops->vidioc_g_fmt_vid_cap ||
ops->vidioc_g_fmt_vid_cap_mplane)
return 0;
break;
case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
if (ops->vidioc_g_fmt_vid_cap_mplane)
return 0;
break;
case V4L2_BUF_TYPE_VIDEO_OVERLAY:
@ -530,7 +569,12 @@ static int check_fmt(const struct v4l2_ioctl_ops *ops, enum v4l2_buf_type type)
return 0;
break;
case V4L2_BUF_TYPE_VIDEO_OUTPUT:
if (ops->vidioc_g_fmt_vid_out)
if (ops->vidioc_g_fmt_vid_out ||
ops->vidioc_g_fmt_vid_out_mplane)
return 0;
break;
case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
if (ops->vidioc_g_fmt_vid_out_mplane)
return 0;
break;
case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
@ -561,12 +605,70 @@ static int check_fmt(const struct v4l2_ioctl_ops *ops, enum v4l2_buf_type type)
return -EINVAL;
}
/**
* fmt_sp_to_mp() - Convert a single-plane format to its multi-planar 1-plane
* equivalent
*/
static int fmt_sp_to_mp(const struct v4l2_format *f_sp,
struct v4l2_format *f_mp)
{
struct v4l2_pix_format_mplane *pix_mp = &f_mp->fmt.pix_mp;
const struct v4l2_pix_format *pix = &f_sp->fmt.pix;
if (f_sp->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
f_mp->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
else if (f_sp->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
f_mp->type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
else
return -EINVAL;
pix_mp->width = pix->width;
pix_mp->height = pix->height;
pix_mp->pixelformat = pix->pixelformat;
pix_mp->field = pix->field;
pix_mp->colorspace = pix->colorspace;
pix_mp->num_planes = 1;
pix_mp->plane_fmt[0].sizeimage = pix->sizeimage;
pix_mp->plane_fmt[0].bytesperline = pix->bytesperline;
return 0;
}
/**
* fmt_mp_to_sp() - Convert a multi-planar 1-plane format to its single-planar
* equivalent
*/
static int fmt_mp_to_sp(const struct v4l2_format *f_mp,
struct v4l2_format *f_sp)
{
const struct v4l2_pix_format_mplane *pix_mp = &f_mp->fmt.pix_mp;
struct v4l2_pix_format *pix = &f_sp->fmt.pix;
if (f_mp->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
f_sp->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
else if (f_mp->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
f_sp->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
else
return -EINVAL;
pix->width = pix_mp->width;
pix->height = pix_mp->height;
pix->pixelformat = pix_mp->pixelformat;
pix->field = pix_mp->field;
pix->colorspace = pix_mp->colorspace;
pix->sizeimage = pix_mp->plane_fmt[0].sizeimage;
pix->bytesperline = pix_mp->plane_fmt[0].bytesperline;
return 0;
}
static long __video_do_ioctl(struct file *file,
unsigned int cmd, void *arg)
{
struct video_device *vfd = video_devdata(file);
const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
void *fh = file->private_data;
struct v4l2_format f_copy;
long ret = -EINVAL;
if (ops == NULL) {
@ -635,6 +737,11 @@ static long __video_do_ioctl(struct file *file,
if (ops->vidioc_enum_fmt_vid_cap)
ret = ops->vidioc_enum_fmt_vid_cap(file, fh, f);
break;
case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
if (ops->vidioc_enum_fmt_vid_cap_mplane)
ret = ops->vidioc_enum_fmt_vid_cap_mplane(file,
fh, f);
break;
case V4L2_BUF_TYPE_VIDEO_OVERLAY:
if (ops->vidioc_enum_fmt_vid_overlay)
ret = ops->vidioc_enum_fmt_vid_overlay(file,
@ -644,6 +751,11 @@ static long __video_do_ioctl(struct file *file,
if (ops->vidioc_enum_fmt_vid_out)
ret = ops->vidioc_enum_fmt_vid_out(file, fh, f);
break;
case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
if (ops->vidioc_enum_fmt_vid_out_mplane)
ret = ops->vidioc_enum_fmt_vid_out_mplane(file,
fh, f);
break;
case V4L2_BUF_TYPE_PRIVATE:
if (ops->vidioc_enum_fmt_type_private)
ret = ops->vidioc_enum_fmt_type_private(file,
@ -672,22 +784,90 @@ static long __video_do_ioctl(struct file *file,
switch (f->type) {
case V4L2_BUF_TYPE_VIDEO_CAPTURE:
if (ops->vidioc_g_fmt_vid_cap)
if (ops->vidioc_g_fmt_vid_cap) {
ret = ops->vidioc_g_fmt_vid_cap(file, fh, f);
} else if (ops->vidioc_g_fmt_vid_cap_mplane) {
if (fmt_sp_to_mp(f, &f_copy))
break;
ret = ops->vidioc_g_fmt_vid_cap_mplane(file, fh,
&f_copy);
if (ret)
break;
/* Driver is currently in multi-planar format,
* we can't return it in single-planar API*/
if (f_copy.fmt.pix_mp.num_planes > 1) {
ret = -EBUSY;
break;
}
ret = fmt_mp_to_sp(&f_copy, f);
}
if (!ret)
v4l_print_pix_fmt(vfd, &f->fmt.pix);
break;
case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
if (ops->vidioc_g_fmt_vid_cap_mplane) {
ret = ops->vidioc_g_fmt_vid_cap_mplane(file,
fh, f);
} else if (ops->vidioc_g_fmt_vid_cap) {
if (fmt_mp_to_sp(f, &f_copy))
break;
ret = ops->vidioc_g_fmt_vid_cap(file,
fh, &f_copy);
if (ret)
break;
ret = fmt_sp_to_mp(&f_copy, f);
}
if (!ret)
v4l_print_pix_fmt_mplane(vfd, &f->fmt.pix_mp);
break;
case V4L2_BUF_TYPE_VIDEO_OVERLAY:
if (ops->vidioc_g_fmt_vid_overlay)
ret = ops->vidioc_g_fmt_vid_overlay(file,
fh, f);
break;
case V4L2_BUF_TYPE_VIDEO_OUTPUT:
if (ops->vidioc_g_fmt_vid_out)
if (ops->vidioc_g_fmt_vid_out) {
ret = ops->vidioc_g_fmt_vid_out(file, fh, f);
} else if (ops->vidioc_g_fmt_vid_out_mplane) {
if (fmt_sp_to_mp(f, &f_copy))
break;
ret = ops->vidioc_g_fmt_vid_out_mplane(file, fh,
&f_copy);
if (ret)
break;
/* Driver is currently in multi-planar format,
* we can't return it in single-planar API*/
if (f_copy.fmt.pix_mp.num_planes > 1) {
ret = -EBUSY;
break;
}
ret = fmt_mp_to_sp(&f_copy, f);
}
if (!ret)
v4l_print_pix_fmt(vfd, &f->fmt.pix);
break;
case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
if (ops->vidioc_g_fmt_vid_out_mplane) {
ret = ops->vidioc_g_fmt_vid_out_mplane(file,
fh, f);
} else if (ops->vidioc_g_fmt_vid_out) {
if (fmt_mp_to_sp(f, &f_copy))
break;
ret = ops->vidioc_g_fmt_vid_out(file,
fh, &f_copy);
if (ret)
break;
ret = fmt_sp_to_mp(&f_copy, f);
}
if (!ret)
v4l_print_pix_fmt_mplane(vfd, &f->fmt.pix_mp);
break;
case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
if (ops->vidioc_g_fmt_vid_out_overlay)
ret = ops->vidioc_g_fmt_vid_out_overlay(file,
@ -731,8 +911,44 @@ static long __video_do_ioctl(struct file *file,
case V4L2_BUF_TYPE_VIDEO_CAPTURE:
CLEAR_AFTER_FIELD(f, fmt.pix);
v4l_print_pix_fmt(vfd, &f->fmt.pix);
if (ops->vidioc_s_fmt_vid_cap)
if (ops->vidioc_s_fmt_vid_cap) {
ret = ops->vidioc_s_fmt_vid_cap(file, fh, f);
} else if (ops->vidioc_s_fmt_vid_cap_mplane) {
if (fmt_sp_to_mp(f, &f_copy))
break;
ret = ops->vidioc_s_fmt_vid_cap_mplane(file, fh,
&f_copy);
if (ret)
break;
if (f_copy.fmt.pix_mp.num_planes > 1) {
/* Drivers shouldn't adjust from 1-plane
* to more than 1-plane formats */
ret = -EBUSY;
WARN_ON(1);
break;
}
ret = fmt_mp_to_sp(&f_copy, f);
}
break;
case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
CLEAR_AFTER_FIELD(f, fmt.pix_mp);
v4l_print_pix_fmt_mplane(vfd, &f->fmt.pix_mp);
if (ops->vidioc_s_fmt_vid_cap_mplane) {
ret = ops->vidioc_s_fmt_vid_cap_mplane(file,
fh, f);
} else if (ops->vidioc_s_fmt_vid_cap &&
f->fmt.pix_mp.num_planes == 1) {
if (fmt_mp_to_sp(f, &f_copy))
break;
ret = ops->vidioc_s_fmt_vid_cap(file,
fh, &f_copy);
if (ret)
break;
ret = fmt_sp_to_mp(&f_copy, f);
}
break;
case V4L2_BUF_TYPE_VIDEO_OVERLAY:
CLEAR_AFTER_FIELD(f, fmt.win);
@ -743,8 +959,44 @@ static long __video_do_ioctl(struct file *file,
case V4L2_BUF_TYPE_VIDEO_OUTPUT:
CLEAR_AFTER_FIELD(f, fmt.pix);
v4l_print_pix_fmt(vfd, &f->fmt.pix);
if (ops->vidioc_s_fmt_vid_out)
if (ops->vidioc_s_fmt_vid_out) {
ret = ops->vidioc_s_fmt_vid_out(file, fh, f);
} else if (ops->vidioc_s_fmt_vid_out_mplane) {
if (fmt_sp_to_mp(f, &f_copy))
break;
ret = ops->vidioc_s_fmt_vid_out_mplane(file, fh,
&f_copy);
if (ret)
break;
if (f_copy.fmt.pix_mp.num_planes > 1) {
/* Drivers shouldn't adjust from 1-plane
* to more than 1-plane formats */
ret = -EBUSY;
WARN_ON(1);
break;
}
ret = fmt_mp_to_sp(&f_copy, f);
}
break;
case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
CLEAR_AFTER_FIELD(f, fmt.pix_mp);
v4l_print_pix_fmt_mplane(vfd, &f->fmt.pix_mp);
if (ops->vidioc_s_fmt_vid_out_mplane) {
ret = ops->vidioc_s_fmt_vid_out_mplane(file,
fh, f);
} else if (ops->vidioc_s_fmt_vid_out &&
f->fmt.pix_mp.num_planes == 1) {
if (fmt_mp_to_sp(f, &f_copy))
break;
ret = ops->vidioc_s_fmt_vid_out(file,
fh, &f_copy);
if (ret)
break;
ret = fmt_mp_to_sp(&f_copy, f);
}
break;
case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
CLEAR_AFTER_FIELD(f, fmt.win);
@ -793,11 +1045,47 @@ static long __video_do_ioctl(struct file *file,
switch (f->type) {
case V4L2_BUF_TYPE_VIDEO_CAPTURE:
CLEAR_AFTER_FIELD(f, fmt.pix);
if (ops->vidioc_try_fmt_vid_cap)
if (ops->vidioc_try_fmt_vid_cap) {
ret = ops->vidioc_try_fmt_vid_cap(file, fh, f);
} else if (ops->vidioc_try_fmt_vid_cap_mplane) {
if (fmt_sp_to_mp(f, &f_copy))
break;
ret = ops->vidioc_try_fmt_vid_cap_mplane(file,
fh, &f_copy);
if (ret)
break;
if (f_copy.fmt.pix_mp.num_planes > 1) {
/* Drivers shouldn't adjust from 1-plane
* to more than 1-plane formats */
ret = -EBUSY;
WARN_ON(1);
break;
}
ret = fmt_mp_to_sp(&f_copy, f);
}
if (!ret)
v4l_print_pix_fmt(vfd, &f->fmt.pix);
break;
case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
CLEAR_AFTER_FIELD(f, fmt.pix_mp);
if (ops->vidioc_try_fmt_vid_cap_mplane) {
ret = ops->vidioc_try_fmt_vid_cap_mplane(file,
fh, f);
} else if (ops->vidioc_try_fmt_vid_cap &&
f->fmt.pix_mp.num_planes == 1) {
if (fmt_mp_to_sp(f, &f_copy))
break;
ret = ops->vidioc_try_fmt_vid_cap(file,
fh, &f_copy);
if (ret)
break;
ret = fmt_sp_to_mp(&f_copy, f);
}
if (!ret)
v4l_print_pix_fmt_mplane(vfd, &f->fmt.pix_mp);
break;
case V4L2_BUF_TYPE_VIDEO_OVERLAY:
CLEAR_AFTER_FIELD(f, fmt.win);
if (ops->vidioc_try_fmt_vid_overlay)
@ -806,11 +1094,47 @@ static long __video_do_ioctl(struct file *file,
break;
case V4L2_BUF_TYPE_VIDEO_OUTPUT:
CLEAR_AFTER_FIELD(f, fmt.pix);
if (ops->vidioc_try_fmt_vid_out)
if (ops->vidioc_try_fmt_vid_out) {
ret = ops->vidioc_try_fmt_vid_out(file, fh, f);
} else if (ops->vidioc_try_fmt_vid_out_mplane) {
if (fmt_sp_to_mp(f, &f_copy))
break;
ret = ops->vidioc_try_fmt_vid_out_mplane(file,
fh, &f_copy);
if (ret)
break;
if (f_copy.fmt.pix_mp.num_planes > 1) {
/* Drivers shouldn't adjust from 1-plane
* to more than 1-plane formats */
ret = -EBUSY;
WARN_ON(1);
break;
}
ret = fmt_mp_to_sp(&f_copy, f);
}
if (!ret)
v4l_print_pix_fmt(vfd, &f->fmt.pix);
break;
case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
CLEAR_AFTER_FIELD(f, fmt.pix_mp);
if (ops->vidioc_try_fmt_vid_out_mplane) {
ret = ops->vidioc_try_fmt_vid_out_mplane(file,
fh, f);
} else if (ops->vidioc_try_fmt_vid_out &&
f->fmt.pix_mp.num_planes == 1) {
if (fmt_mp_to_sp(f, &f_copy))
break;
ret = ops->vidioc_try_fmt_vid_out(file,
fh, &f_copy);
if (ret)
break;
ret = fmt_sp_to_mp(&f_copy, f);
}
if (!ret)
v4l_print_pix_fmt_mplane(vfd, &f->fmt.pix_mp);
break;
case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
CLEAR_AFTER_FIELD(f, fmt.win);
if (ops->vidioc_try_fmt_vid_out_overlay)
@ -1975,7 +2299,7 @@ static unsigned long cmd_input_size(unsigned int cmd)
switch (cmd) {
CMDINSIZE(ENUM_FMT, fmtdesc, type);
CMDINSIZE(G_FMT, format, type);
CMDINSIZE(QUERYBUF, buffer, type);
CMDINSIZE(QUERYBUF, buffer, length);
CMDINSIZE(G_PARM, streamparm, type);
CMDINSIZE(ENUMSTD, standard, index);
CMDINSIZE(ENUMINPUT, input, index);
@ -2000,6 +2324,49 @@ static unsigned long cmd_input_size(unsigned int cmd)
}
}
static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
void * __user *user_ptr, void ***kernel_ptr)
{
int ret = 0;
switch (cmd) {
case VIDIOC_QUERYBUF:
case VIDIOC_QBUF:
case VIDIOC_DQBUF: {
struct v4l2_buffer *buf = parg;
if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
if (buf->length > VIDEO_MAX_PLANES) {
ret = -EINVAL;
break;
}
*user_ptr = (void __user *)buf->m.planes;
*kernel_ptr = (void **)&buf->m.planes;
*array_size = sizeof(struct v4l2_plane) * buf->length;
ret = 1;
}
break;
}
case VIDIOC_S_EXT_CTRLS:
case VIDIOC_G_EXT_CTRLS:
case VIDIOC_TRY_EXT_CTRLS: {
struct v4l2_ext_controls *ctrls = parg;
if (ctrls->count != 0) {
*user_ptr = (void __user *)ctrls->controls;
*kernel_ptr = (void **)&ctrls->controls;
*array_size = sizeof(struct v4l2_ext_control)
* ctrls->count;
ret = 1;
}
break;
}
}
return ret;
}
long video_ioctl2(struct file *file,
unsigned int cmd, unsigned long arg)
{
@ -2007,16 +2374,14 @@ long video_ioctl2(struct file *file,
void *mbuf = NULL;
void *parg = (void *)arg;
long err = -EINVAL;
int is_ext_ctrl;
size_t ctrls_size = 0;
bool has_array_args;
size_t array_size = 0;
void __user *user_ptr = NULL;
void **kernel_ptr = NULL;
#ifdef __OLD_VIDIOC_
cmd = video_fix_command(cmd);
#endif
is_ext_ctrl = (cmd == VIDIOC_S_EXT_CTRLS || cmd == VIDIOC_G_EXT_CTRLS ||
cmd == VIDIOC_TRY_EXT_CTRLS);
/* Copy arguments into temp kernel buffer */
if (_IOC_DIR(cmd) != _IOC_NONE) {
if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
@ -2045,43 +2410,43 @@ long video_ioctl2(struct file *file,
}
}
if (is_ext_ctrl) {
struct v4l2_ext_controls *p = parg;
err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr);
if (err < 0)
goto out;
has_array_args = err;
/* In case of an error, tell the caller that it wasn't
a specific control that caused it. */
p->error_idx = p->count;
user_ptr = (void __user *)p->controls;
if (p->count) {
ctrls_size = sizeof(struct v4l2_ext_control) * p->count;
/* Note: v4l2_ext_controls fits in sbuf[] so mbuf is still NULL. */
mbuf = kmalloc(ctrls_size, GFP_KERNEL);
err = -ENOMEM;
if (NULL == mbuf)
goto out_ext_ctrl;
err = -EFAULT;
if (copy_from_user(mbuf, user_ptr, ctrls_size))
goto out_ext_ctrl;
p->controls = mbuf;
}
if (has_array_args) {
/*
* When adding new types of array args, make sure that the
* parent argument to ioctl (which contains the pointer to the
* array) fits into sbuf (so that mbuf will still remain
* unused up to here).
*/
mbuf = kmalloc(array_size, GFP_KERNEL);
err = -ENOMEM;
if (NULL == mbuf)
goto out_array_args;
err = -EFAULT;
if (copy_from_user(mbuf, user_ptr, array_size))
goto out_array_args;
*kernel_ptr = mbuf;
}
/* Handles IOCTL */
err = __video_do_ioctl(file, cmd, parg);
if (err == -ENOIOCTLCMD)
err = -EINVAL;
if (is_ext_ctrl) {
struct v4l2_ext_controls *p = parg;
p->controls = (void *)user_ptr;
if (p->count && err == 0 && copy_to_user(user_ptr, mbuf, ctrls_size))
if (has_array_args) {
*kernel_ptr = user_ptr;
if (copy_to_user(user_ptr, mbuf, array_size))
err = -EFAULT;
goto out_ext_ctrl;
goto out_array_args;
}
if (err < 0)
goto out;
out_ext_ctrl:
out_array_args:
/* Copy results into user buffer */
switch (_IOC_DIR(cmd)) {
case _IOC_READ:

16
include/media/v4l2-ioctl.h
View file

@ -37,6 +37,10 @@ struct v4l2_ioctl_ops {
struct v4l2_fmtdesc *f);
int (*vidioc_enum_fmt_vid_out) (struct file *file, void *fh,
struct v4l2_fmtdesc *f);
int (*vidioc_enum_fmt_vid_cap_mplane)(struct file *file, void *fh,
struct v4l2_fmtdesc *f);
int (*vidioc_enum_fmt_vid_out_mplane)(struct file *file, void *fh,
struct v4l2_fmtdesc *f);
int (*vidioc_enum_fmt_type_private)(struct file *file, void *fh,
struct v4l2_fmtdesc *f);
@ -57,6 +61,10 @@ struct v4l2_ioctl_ops {
struct v4l2_format *f);
int (*vidioc_g_fmt_sliced_vbi_out)(struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_g_fmt_vid_cap_mplane)(struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_g_fmt_vid_out_mplane)(struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_g_fmt_type_private)(struct file *file, void *fh,
struct v4l2_format *f);
@ -77,6 +85,10 @@ struct v4l2_ioctl_ops {
struct v4l2_format *f);
int (*vidioc_s_fmt_sliced_vbi_out)(struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_s_fmt_vid_cap_mplane)(struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_s_fmt_vid_out_mplane)(struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_s_fmt_type_private)(struct file *file, void *fh,
struct v4l2_format *f);
@ -97,6 +109,10 @@ struct v4l2_ioctl_ops {
struct v4l2_format *f);
int (*vidioc_try_fmt_sliced_vbi_out)(struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_try_fmt_vid_cap_mplane)(struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_try_fmt_vid_out_mplane)(struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_try_fmt_type_private)(struct file *file, void *fh,
struct v4l2_format *f);