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authorPawel Osciak <p.osciak@samsung.com>2010-12-23 04:15:27 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2011-03-21 20:31:33 -0300
commitd14e6d76ebf740fd0d0bd296933993a555938896 (patch)
treed6b922de6d8849e379eea61f7d56bc67ed645126 /drivers/media/video/v4l2-ioctl.c
parentf8f3914cf922f5f9e1d60e9e10f6fb92742907ad (diff)
[media] v4l: Add multi-planar ioctl handling code
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>
Diffstat (limited to 'drivers/media/video/v4l2-ioctl.c')
-rw-r--r--drivers/media/video/v4l2-ioctl.c453
1 files changed, 409 insertions, 44 deletions
diff --git a/drivers/media/video/v4l2-ioctl.c b/drivers/media/video/v4l2-ioctl.c
index 1a9d90ab666b..8360ed2d933a 100644
--- a/drivers/media/video/v4l2-ioctl.c
+++ b/drivers/media/video/v4l2-ioctl.c
@@ -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:

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