return 0;
}
+int uvc_ctrl_is_accessible(struct uvc_video_chain *chain, u32 v4l2_id,
+ bool read)
+{
+ struct uvc_control_mapping *mapping;
+ struct uvc_control *ctrl;
+
+ if (__uvc_query_v4l2_class(chain, v4l2_id, 0) >= 0)
+ return -EACCES;
+
+ ctrl = uvc_find_control(chain, v4l2_id, &mapping);
+ if (!ctrl)
+ return -EINVAL;
+
+ if (!(ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR) && read)
+ return -EACCES;
+
+ if (!(ctrl->info.flags & UVC_CTRL_FLAG_SET_CUR) && !read)
+ return -EACCES;
+
+ return 0;
+}
+
static const char *uvc_map_get_name(const struct uvc_control_mapping *map)
{
const char *name;
return 0;
}
+static int uvc_ctrl_check_access(struct uvc_video_chain *chain,
+ struct v4l2_ext_controls *ctrls,
+ unsigned long ioctl)
+{
+ struct v4l2_ext_control *ctrl = ctrls->controls;
+ unsigned int i;
+ int ret = 0;
+
+ for (i = 0; i < ctrls->count; ++ctrl, ++i) {
+ ret = uvc_ctrl_is_accessible(chain, ctrl->id,
+ ioctl == VIDIOC_G_EXT_CTRLS);
+ if (ret)
+ break;
+ }
+
+ ctrls->error_idx = ioctl == VIDIOC_TRY_EXT_CTRLS ? i : ctrls->count;
+
+ return ret;
+}
+
static int uvc_ioctl_g_ext_ctrls(struct file *file, void *fh,
struct v4l2_ext_controls *ctrls)
{
unsigned int i;
int ret;
+ ret = uvc_ctrl_check_access(chain, ctrls, VIDIOC_G_EXT_CTRLS);
+ if (ret < 0)
+ return ret;
+
if (ctrls->which == V4L2_CTRL_WHICH_DEF_VAL) {
for (i = 0; i < ctrls->count; ++ctrl, ++i) {
struct v4l2_queryctrl qc = { .id = ctrl->id };
static int uvc_ioctl_s_try_ext_ctrls(struct uvc_fh *handle,
struct v4l2_ext_controls *ctrls,
- bool commit)
+ unsigned long ioctl)
{
struct v4l2_ext_control *ctrl = ctrls->controls;
struct uvc_video_chain *chain = handle->chain;
unsigned int i;
int ret;
+ ret = uvc_ctrl_check_access(chain, ctrls, ioctl);
+ if (ret < 0)
+ return ret;
+
ret = uvc_ctrl_begin(chain);
if (ret < 0)
return ret;
ret = uvc_ctrl_set(handle, ctrl);
if (ret < 0) {
uvc_ctrl_rollback(handle);
- ctrls->error_idx = commit ? ctrls->count : i;
+ ctrls->error_idx = ioctl == VIDIOC_S_EXT_CTRLS ?
+ ctrls->count : i;
return ret;
}
}
ctrls->error_idx = 0;
- if (commit)
+ if (ioctl == VIDIOC_S_EXT_CTRLS)
return uvc_ctrl_commit(handle, ctrls->controls, ctrls->count);
else
return uvc_ctrl_rollback(handle);
{
struct uvc_fh *handle = fh;
- return uvc_ioctl_s_try_ext_ctrls(handle, ctrls, true);
+ return uvc_ioctl_s_try_ext_ctrls(handle, ctrls, VIDIOC_S_EXT_CTRLS);
}
static int uvc_ioctl_try_ext_ctrls(struct file *file, void *fh,
{
struct uvc_fh *handle = fh;
- return uvc_ioctl_s_try_ext_ctrls(handle, ctrls, false);
+ return uvc_ioctl_s_try_ext_ctrls(handle, ctrls, VIDIOC_TRY_EXT_CTRLS);
}
static int uvc_ioctl_querymenu(struct file *file, void *fh,