Hi,
Comments inline.
On 05/10/2012 09:05 AM, Hans Verkuil wrote:
From: Hans Verkuil<hans.verkuil@xxxxxxxxx>
Rather than testing whether an ioctl is implemented in the driver or not
every time the ioctl is called, do it upfront when the device is registered.
This also allows a driver to disable certain ioctls based on the capabilities
of the detected board, something you can't do today without creating separate
v4l2_ioctl_ops structs for each new variation.
For the most part it is pretty straightforward, but for control ioctls a flag
is needed since it is possible that you have per-filehandle controls, and that
can't be determined upfront of course.
Signed-off-by: Hans Verkuil<hans.verkuil@xxxxxxxxx>
---
drivers/media/video/v4l2-dev.c | 171 +++++++++++++++++
drivers/media/video/v4l2-ioctl.c | 391 +++++++++++---------------------------
include/media/v4l2-dev.h | 11 ++
3 files changed, 297 insertions(+), 276 deletions(-)
diff --git a/drivers/media/video/v4l2-dev.c b/drivers/media/video/v4l2-dev.c
index a51a061..4d98ee1 100644
--- a/drivers/media/video/v4l2-dev.c
+++ b/drivers/media/video/v4l2-dev.c
@@ -516,6 +516,175 @@ static int get_index(struct video_device *vdev)
return find_first_zero_bit(used, VIDEO_NUM_DEVICES);
}
+#define SET_VALID_IOCTL(ops, cmd, op) \
+ if (ops->op) \
+ set_bit(_IOC_NR(cmd), valid_ioctls)
+
+/* This determines which ioctls are actually implemented in the driver.
+ It's a one-time thing which simplifies video_ioctl2 as it can just do
+ a bit test.
+
+ Note that drivers can override this by setting bits to 1 in
+ vdev->valid_ioctls. If an ioctl is marked as 1 when this function is
+ called, then that ioctl will actually be marked as unimplemented.
+
+ It does that by first setting up the local valid_ioctls bitmap, and
+ at the end do a:
+
+ vdev->valid_ioctls = valid_ioctls& ~(vdev->valid_ioctls)
+ */
+static void determine_valid_ioctls(struct video_device *vdev)
+{
+ DECLARE_BITMAP(valid_ioctls, BASE_VIDIOC_PRIVATE);
+ const struct v4l2_ioctl_ops *ops = vdev->ioctl_ops;
+
+ bitmap_zero(valid_ioctls, BASE_VIDIOC_PRIVATE);
+
+ SET_VALID_IOCTL(ops, VIDIOC_QUERYCAP, vidioc_querycap);
+ if (ops->vidioc_g_priority ||
+ test_bit(V4L2_FL_USE_FH_PRIO,&vdev->flags))
+ set_bit(_IOC_NR(VIDIOC_G_PRIORITY), valid_ioctls);
+ if (ops->vidioc_s_priority ||
+ test_bit(V4L2_FL_USE_FH_PRIO,&vdev->flags))
+ set_bit(_IOC_NR(VIDIOC_S_PRIORITY), valid_ioctls);
+ if (ops->vidioc_enum_fmt_vid_cap ||
+ ops->vidioc_enum_fmt_vid_out ||
+ ops->vidioc_enum_fmt_vid_cap_mplane ||
+ ops->vidioc_enum_fmt_vid_out_mplane ||
+ ops->vidioc_enum_fmt_vid_overlay ||
+ ops->vidioc_enum_fmt_type_private)
+ set_bit(_IOC_NR(VIDIOC_ENUM_FMT), valid_ioctls);
+ if (ops->vidioc_g_fmt_vid_cap ||
+ ops->vidioc_g_fmt_vid_out ||
+ ops->vidioc_g_fmt_vid_cap_mplane ||
+ ops->vidioc_g_fmt_vid_out_mplane ||
+ ops->vidioc_g_fmt_vid_overlay ||
+ ops->vidioc_g_fmt_vbi_cap ||
+ ops->vidioc_g_fmt_vid_out_overlay ||
+ ops->vidioc_g_fmt_vbi_out ||
+ ops->vidioc_g_fmt_sliced_vbi_cap ||
+ ops->vidioc_g_fmt_sliced_vbi_out ||
+ ops->vidioc_g_fmt_type_private)
+ set_bit(_IOC_NR(VIDIOC_G_FMT), valid_ioctls);
+ if (ops->vidioc_s_fmt_vid_cap ||
+ ops->vidioc_s_fmt_vid_out ||
+ ops->vidioc_s_fmt_vid_cap_mplane ||
+ ops->vidioc_s_fmt_vid_out_mplane ||
+ ops->vidioc_s_fmt_vid_overlay ||
+ ops->vidioc_s_fmt_vbi_cap ||
+ ops->vidioc_s_fmt_vid_out_overlay ||
+ ops->vidioc_s_fmt_vbi_out ||
+ ops->vidioc_s_fmt_sliced_vbi_cap ||
+ ops->vidioc_s_fmt_sliced_vbi_out ||
+ ops->vidioc_s_fmt_type_private)
+ set_bit(_IOC_NR(VIDIOC_S_FMT), valid_ioctls);
+ if (ops->vidioc_try_fmt_vid_cap ||
+ ops->vidioc_try_fmt_vid_out ||
+ ops->vidioc_try_fmt_vid_cap_mplane ||
+ ops->vidioc_try_fmt_vid_out_mplane ||
+ ops->vidioc_try_fmt_vid_overlay ||
+ ops->vidioc_try_fmt_vbi_cap ||
+ ops->vidioc_try_fmt_vid_out_overlay ||
+ ops->vidioc_try_fmt_vbi_out ||
+ ops->vidioc_try_fmt_sliced_vbi_cap ||
+ ops->vidioc_try_fmt_sliced_vbi_out ||
+ ops->vidioc_try_fmt_type_private)
+ set_bit(_IOC_NR(VIDIOC_TRY_FMT), valid_ioctls);
+ SET_VALID_IOCTL(ops, VIDIOC_REQBUFS, vidioc_reqbufs);
+ SET_VALID_IOCTL(ops, VIDIOC_QUERYBUF, vidioc_querybuf);
+ SET_VALID_IOCTL(ops, VIDIOC_QBUF, vidioc_qbuf);
+ SET_VALID_IOCTL(ops, VIDIOC_DQBUF, vidioc_dqbuf);
+ SET_VALID_IOCTL(ops, VIDIOC_OVERLAY, vidioc_overlay);
+ SET_VALID_IOCTL(ops, VIDIOC_G_FBUF, vidioc_g_fbuf);
+ SET_VALID_IOCTL(ops, VIDIOC_S_FBUF, vidioc_s_fbuf);
+ SET_VALID_IOCTL(ops, VIDIOC_STREAMON, vidioc_streamon);
+ SET_VALID_IOCTL(ops, VIDIOC_STREAMOFF, vidioc_streamoff);
+ if (vdev->tvnorms)
+ set_bit(_IOC_NR(VIDIOC_ENUMSTD), valid_ioctls);
+ if (ops->vidioc_g_std || vdev->current_norm)
+ set_bit(_IOC_NR(VIDIOC_G_STD), valid_ioctls);
+ SET_VALID_IOCTL(ops, VIDIOC_S_STD, vidioc_s_std);
+ SET_VALID_IOCTL(ops, VIDIOC_QUERYSTD, vidioc_querystd);
+ SET_VALID_IOCTL(ops, VIDIOC_ENUMINPUT, vidioc_enum_input);
+ SET_VALID_IOCTL(ops, VIDIOC_G_INPUT, vidioc_g_input);
+ SET_VALID_IOCTL(ops, VIDIOC_S_INPUT, vidioc_s_input);
+ SET_VALID_IOCTL(ops, VIDIOC_ENUMOUTPUT, vidioc_enum_output);
+ SET_VALID_IOCTL(ops, VIDIOC_G_OUTPUT, vidioc_g_output);
+ SET_VALID_IOCTL(ops, VIDIOC_S_OUTPUT, vidioc_s_output);
+ /* Note: the control handler can also be passed through the filehandle,
+ and that can't be tested here. If the bit for these control ioctls
+ is set, then the ioctl is valid. But if it is 0, then it can still
+ be valid if the filehandle passed the control handler. */
+ if (vdev->ctrl_handler || ops->vidioc_queryctrl)
+ set_bit(_IOC_NR(VIDIOC_QUERYCTRL), valid_ioctls);
+ if (vdev->ctrl_handler || ops->vidioc_g_ctrl || ops->vidioc_g_ext_ctrls)
+ set_bit(_IOC_NR(VIDIOC_G_CTRL), valid_ioctls);
+ if (vdev->ctrl_handler || ops->vidioc_s_ctrl || ops->vidioc_s_ext_ctrls)
+ set_bit(_IOC_NR(VIDIOC_S_CTRL), valid_ioctls);
+ if (vdev->ctrl_handler || ops->vidioc_g_ext_ctrls)
+ set_bit(_IOC_NR(VIDIOC_G_EXT_CTRLS), valid_ioctls);
+ if (vdev->ctrl_handler || ops->vidioc_s_ext_ctrls)
+ set_bit(_IOC_NR(VIDIOC_S_EXT_CTRLS), valid_ioctls);
+ if (vdev->ctrl_handler || ops->vidioc_try_ext_ctrls)
+ set_bit(_IOC_NR(VIDIOC_TRY_EXT_CTRLS), valid_ioctls);
+ if (vdev->ctrl_handler || ops->vidioc_querymenu)
+ set_bit(_IOC_NR(VIDIOC_QUERYMENU), valid_ioctls);
+ SET_VALID_IOCTL(ops, VIDIOC_ENUMAUDIO, vidioc_enumaudio);
+ SET_VALID_IOCTL(ops, VIDIOC_G_AUDIO, vidioc_g_audio);
+ SET_VALID_IOCTL(ops, VIDIOC_S_AUDIO, vidioc_s_audio);
+ SET_VALID_IOCTL(ops, VIDIOC_ENUMAUDOUT, vidioc_enumaudout);
+ SET_VALID_IOCTL(ops, VIDIOC_G_AUDOUT, vidioc_g_audout);
+ SET_VALID_IOCTL(ops, VIDIOC_S_AUDOUT, vidioc_s_audout);
+ SET_VALID_IOCTL(ops, VIDIOC_G_MODULATOR, vidioc_g_modulator);
+ SET_VALID_IOCTL(ops, VIDIOC_S_MODULATOR, vidioc_s_modulator);
+ if (ops->vidioc_g_crop || ops->vidioc_g_selection)
+ set_bit(_IOC_NR(VIDIOC_G_CROP), valid_ioctls);
+ if (ops->vidioc_s_crop || ops->vidioc_s_selection)
+ set_bit(_IOC_NR(VIDIOC_S_CROP), valid_ioctls);
+ SET_VALID_IOCTL(ops, VIDIOC_G_SELECTION, vidioc_g_selection);
+ SET_VALID_IOCTL(ops, VIDIOC_S_SELECTION, vidioc_s_selection);
+ if (ops->vidioc_cropcap || ops->vidioc_g_selection)
+ set_bit(_IOC_NR(VIDIOC_CROPCAP), valid_ioctls);
+ SET_VALID_IOCTL(ops, VIDIOC_G_JPEGCOMP, vidioc_g_jpegcomp);
+ SET_VALID_IOCTL(ops, VIDIOC_S_JPEGCOMP, vidioc_s_jpegcomp);
+ SET_VALID_IOCTL(ops, VIDIOC_G_ENC_INDEX, vidioc_g_enc_index);
+ SET_VALID_IOCTL(ops, VIDIOC_ENCODER_CMD, vidioc_encoder_cmd);
+ SET_VALID_IOCTL(ops, VIDIOC_TRY_ENCODER_CMD, vidioc_try_encoder_cmd);
+ SET_VALID_IOCTL(ops, VIDIOC_DECODER_CMD, vidioc_decoder_cmd);
+ SET_VALID_IOCTL(ops, VIDIOC_TRY_DECODER_CMD, vidioc_try_decoder_cmd);
+ if (ops->vidioc_g_parm || vdev->current_norm)
+ set_bit(_IOC_NR(VIDIOC_G_PARM), valid_ioctls);
+ SET_VALID_IOCTL(ops, VIDIOC_S_PARM, vidioc_s_parm);
+ SET_VALID_IOCTL(ops, VIDIOC_G_TUNER, vidioc_g_tuner);
+ SET_VALID_IOCTL(ops, VIDIOC_S_TUNER, vidioc_s_tuner);
+ SET_VALID_IOCTL(ops, VIDIOC_G_FREQUENCY, vidioc_g_frequency);
+ SET_VALID_IOCTL(ops, VIDIOC_S_FREQUENCY, vidioc_s_frequency);
+ SET_VALID_IOCTL(ops, VIDIOC_G_SLICED_VBI_CAP, vidioc_g_sliced_vbi_cap);
+ SET_VALID_IOCTL(ops, VIDIOC_LOG_STATUS, vidioc_log_status);
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+ SET_VALID_IOCTL(ops, VIDIOC_DBG_G_REGISTER, vidioc_g_register);
+ SET_VALID_IOCTL(ops, VIDIOC_DBG_S_REGISTER, vidioc_s_register);
+#endif
+ SET_VALID_IOCTL(ops, VIDIOC_DBG_G_CHIP_IDENT, vidioc_g_chip_ident);
+ SET_VALID_IOCTL(ops, VIDIOC_S_HW_FREQ_SEEK, vidioc_s_hw_freq_seek);
+ SET_VALID_IOCTL(ops, VIDIOC_ENUM_FRAMESIZES, vidioc_enum_framesizes);
+ SET_VALID_IOCTL(ops, VIDIOC_ENUM_FRAMEINTERVALS, vidioc_enum_frameintervals);
+ SET_VALID_IOCTL(ops, VIDIOC_ENUM_DV_PRESETS, vidioc_enum_dv_presets);
+ SET_VALID_IOCTL(ops, VIDIOC_S_DV_PRESET, vidioc_s_dv_preset);
+ SET_VALID_IOCTL(ops, VIDIOC_G_DV_PRESET, vidioc_g_dv_preset);
+ SET_VALID_IOCTL(ops, VIDIOC_QUERY_DV_PRESET, vidioc_query_dv_preset);
+ SET_VALID_IOCTL(ops, VIDIOC_S_DV_TIMINGS, vidioc_s_dv_timings);
+ SET_VALID_IOCTL(ops, VIDIOC_G_DV_TIMINGS, vidioc_g_dv_timings);
+ /* yes, really vidioc_subscribe_event */
+ SET_VALID_IOCTL(ops, VIDIOC_DQEVENT, vidioc_subscribe_event);
+ SET_VALID_IOCTL(ops, VIDIOC_SUBSCRIBE_EVENT, vidioc_subscribe_event);
+ SET_VALID_IOCTL(ops, VIDIOC_UNSUBSCRIBE_EVENT, vidioc_unsubscribe_event);
+ SET_VALID_IOCTL(ops, VIDIOC_CREATE_BUFS, vidioc_create_bufs);
+ SET_VALID_IOCTL(ops, VIDIOC_PREPARE_BUF, vidioc_prepare_buf);
+ bitmap_andnot(vdev->valid_ioctls, valid_ioctls, vdev->valid_ioctls,
+ BASE_VIDIOC_PRIVATE);
+}
+
/**
* __video_register_device - register video4linux devices
* @vdev: video device structure we want to register
@@ -663,6 +832,8 @@ int __video_register_device(struct video_device *vdev, int type, int nr,
vdev->index = get_index(vdev);
mutex_unlock(&videodev_lock);
+ determine_valid_ioctls(vdev);
+
/* Part 3: Initialize the character device */
vdev->cdev = cdev_alloc();
if (vdev->cdev == NULL) {
diff --git a/drivers/media/video/v4l2-ioctl.c b/drivers/media/video/v4l2-ioctl.c
index 3f34098..21da16d 100644
--- a/drivers/media/video/v4l2-ioctl.c
+++ b/drivers/media/video/v4l2-ioctl.c
@@ -55,19 +55,6 @@
memset((u8 *)(p) + offsetof(typeof(*(p)), field) + sizeof((p)->field), \
0, sizeof(*(p)) - offsetof(typeof(*(p)), field) - sizeof((p)->field))
-#define have_fmt_ops(foo) ( \
- ops->vidioc_##foo##_fmt_vid_cap || \
- ops->vidioc_##foo##_fmt_vid_out || \
- ops->vidioc_##foo##_fmt_vid_cap_mplane || \
- ops->vidioc_##foo##_fmt_vid_out_mplane || \
- ops->vidioc_##foo##_fmt_vid_overlay || \
- ops->vidioc_##foo##_fmt_vbi_cap || \
- ops->vidioc_##foo##_fmt_vid_out_overlay || \
- ops->vidioc_##foo##_fmt_vbi_out || \
- ops->vidioc_##foo##_fmt_sliced_vbi_cap || \
- ops->vidioc_##foo##_fmt_sliced_vbi_out || \
- ops->vidioc_##foo##_fmt_type_private)
-
struct std_descr {
v4l2_std_id std;
const char *descr;
@@ -198,93 +185,98 @@ static const char *v4l2_memory_names[] = {
struct v4l2_ioctl_info {
unsigned int ioctl;
+ u16 flags;
const char * const name;
};
-#define IOCTL_INFO(_ioctl) [_IOC_NR(_ioctl)] = { \
- .ioctl = _ioctl, \
- .name = #_ioctl, \
+/* This control can be valid if the filehandle passes a control handler. */
+#define INFO_FL_CTRL (1<< 1)
+
+#define IOCTL_INFO(_ioctl, _flags) [_IOC_NR(_ioctl)] = { \
+ .ioctl = _ioctl, \
+ .flags = _flags, \
+ .name = #_ioctl, \
}
static struct v4l2_ioctl_info v4l2_ioctls[] = {
- IOCTL_INFO(VIDIOC_QUERYCAP),
- IOCTL_INFO(VIDIOC_ENUM_FMT),
- IOCTL_INFO(VIDIOC_G_FMT),
- IOCTL_INFO(VIDIOC_S_FMT),
- IOCTL_INFO(VIDIOC_REQBUFS),
- IOCTL_INFO(VIDIOC_QUERYBUF),
- IOCTL_INFO(VIDIOC_G_FBUF),
- IOCTL_INFO(VIDIOC_S_FBUF),
- IOCTL_INFO(VIDIOC_OVERLAY),
- IOCTL_INFO(VIDIOC_QBUF),
- IOCTL_INFO(VIDIOC_DQBUF),
- IOCTL_INFO(VIDIOC_STREAMON),
- IOCTL_INFO(VIDIOC_STREAMOFF),
- IOCTL_INFO(VIDIOC_G_PARM),
- IOCTL_INFO(VIDIOC_S_PARM),
- IOCTL_INFO(VIDIOC_G_STD),
- IOCTL_INFO(VIDIOC_S_STD),
- IOCTL_INFO(VIDIOC_ENUMSTD),
- IOCTL_INFO(VIDIOC_ENUMINPUT),
- IOCTL_INFO(VIDIOC_G_CTRL),
- IOCTL_INFO(VIDIOC_S_CTRL),
- IOCTL_INFO(VIDIOC_G_TUNER),
- IOCTL_INFO(VIDIOC_S_TUNER),
- IOCTL_INFO(VIDIOC_G_AUDIO),
- IOCTL_INFO(VIDIOC_S_AUDIO),
- IOCTL_INFO(VIDIOC_QUERYCTRL),
- IOCTL_INFO(VIDIOC_QUERYMENU),
- IOCTL_INFO(VIDIOC_G_INPUT),
- IOCTL_INFO(VIDIOC_S_INPUT),
- IOCTL_INFO(VIDIOC_G_OUTPUT),
- IOCTL_INFO(VIDIOC_S_OUTPUT),
- IOCTL_INFO(VIDIOC_ENUMOUTPUT),
- IOCTL_INFO(VIDIOC_G_AUDOUT),
- IOCTL_INFO(VIDIOC_S_AUDOUT),
- IOCTL_INFO(VIDIOC_G_MODULATOR),
- IOCTL_INFO(VIDIOC_S_MODULATOR),
- IOCTL_INFO(VIDIOC_G_FREQUENCY),
- IOCTL_INFO(VIDIOC_S_FREQUENCY),
- IOCTL_INFO(VIDIOC_CROPCAP),
- IOCTL_INFO(VIDIOC_G_CROP),
- IOCTL_INFO(VIDIOC_S_CROP),
- IOCTL_INFO(VIDIOC_G_SELECTION),
- IOCTL_INFO(VIDIOC_S_SELECTION),
- IOCTL_INFO(VIDIOC_G_JPEGCOMP),
- IOCTL_INFO(VIDIOC_S_JPEGCOMP),
- IOCTL_INFO(VIDIOC_QUERYSTD),
- IOCTL_INFO(VIDIOC_TRY_FMT),
- IOCTL_INFO(VIDIOC_ENUMAUDIO),
- IOCTL_INFO(VIDIOC_ENUMAUDOUT),
- IOCTL_INFO(VIDIOC_G_PRIORITY),
- IOCTL_INFO(VIDIOC_S_PRIORITY),
- IOCTL_INFO(VIDIOC_G_SLICED_VBI_CAP),
- IOCTL_INFO(VIDIOC_LOG_STATUS),
- IOCTL_INFO(VIDIOC_G_EXT_CTRLS),
- IOCTL_INFO(VIDIOC_S_EXT_CTRLS),
- IOCTL_INFO(VIDIOC_TRY_EXT_CTRLS),
- IOCTL_INFO(VIDIOC_ENUM_FRAMESIZES),
- IOCTL_INFO(VIDIOC_ENUM_FRAMEINTERVALS),
- IOCTL_INFO(VIDIOC_G_ENC_INDEX),
- IOCTL_INFO(VIDIOC_ENCODER_CMD),
- IOCTL_INFO(VIDIOC_TRY_ENCODER_CMD),
- IOCTL_INFO(VIDIOC_DECODER_CMD),
- IOCTL_INFO(VIDIOC_TRY_DECODER_CMD),
- IOCTL_INFO(VIDIOC_DBG_S_REGISTER),
- IOCTL_INFO(VIDIOC_DBG_G_REGISTER),
- IOCTL_INFO(VIDIOC_DBG_G_CHIP_IDENT),
- IOCTL_INFO(VIDIOC_S_HW_FREQ_SEEK),
- IOCTL_INFO(VIDIOC_ENUM_DV_PRESETS),
- IOCTL_INFO(VIDIOC_S_DV_PRESET),
- IOCTL_INFO(VIDIOC_G_DV_PRESET),
- IOCTL_INFO(VIDIOC_QUERY_DV_PRESET),
- IOCTL_INFO(VIDIOC_S_DV_TIMINGS),
- IOCTL_INFO(VIDIOC_G_DV_TIMINGS),
- IOCTL_INFO(VIDIOC_DQEVENT),
- IOCTL_INFO(VIDIOC_SUBSCRIBE_EVENT),
- IOCTL_INFO(VIDIOC_UNSUBSCRIBE_EVENT),
- IOCTL_INFO(VIDIOC_CREATE_BUFS),
- IOCTL_INFO(VIDIOC_PREPARE_BUF),
+ IOCTL_INFO(VIDIOC_QUERYCAP, 0),
+ IOCTL_INFO(VIDIOC_ENUM_FMT, 0),
+ IOCTL_INFO(VIDIOC_G_FMT, 0),
+ IOCTL_INFO(VIDIOC_S_FMT, 0),
+ IOCTL_INFO(VIDIOC_REQBUFS, 0),
+ IOCTL_INFO(VIDIOC_QUERYBUF, 0),
+ IOCTL_INFO(VIDIOC_G_FBUF, 0),
+ IOCTL_INFO(VIDIOC_S_FBUF, 0),
+ IOCTL_INFO(VIDIOC_OVERLAY, 0),
+ IOCTL_INFO(VIDIOC_QBUF, 0),
+ IOCTL_INFO(VIDIOC_DQBUF, 0),
+ IOCTL_INFO(VIDIOC_STREAMON, 0),
+ IOCTL_INFO(VIDIOC_STREAMOFF, 0),
+ IOCTL_INFO(VIDIOC_G_PARM, 0),
+ IOCTL_INFO(VIDIOC_S_PARM, 0),
+ IOCTL_INFO(VIDIOC_G_STD, 0),
+ IOCTL_INFO(VIDIOC_S_STD, 0),
+ IOCTL_INFO(VIDIOC_ENUMSTD, 0),
+ IOCTL_INFO(VIDIOC_ENUMINPUT, 0),
+ IOCTL_INFO(VIDIOC_G_CTRL, INFO_FL_CTRL),
+ IOCTL_INFO(VIDIOC_S_CTRL, INFO_FL_CTRL),
+ IOCTL_INFO(VIDIOC_G_TUNER, 0),
+ IOCTL_INFO(VIDIOC_S_TUNER, 0),
+ IOCTL_INFO(VIDIOC_G_AUDIO, 0),
+ IOCTL_INFO(VIDIOC_S_AUDIO, 0),
+ IOCTL_INFO(VIDIOC_QUERYCTRL, INFO_FL_CTRL),
+ IOCTL_INFO(VIDIOC_QUERYMENU, INFO_FL_CTRL),
+ IOCTL_INFO(VIDIOC_G_INPUT, 0),
+ IOCTL_INFO(VIDIOC_S_INPUT, 0),
+ IOCTL_INFO(VIDIOC_G_OUTPUT, 0),
+ IOCTL_INFO(VIDIOC_S_OUTPUT, 0),
+ IOCTL_INFO(VIDIOC_ENUMOUTPUT, 0),
+ IOCTL_INFO(VIDIOC_G_AUDOUT, 0),
+ IOCTL_INFO(VIDIOC_S_AUDOUT, 0),
+ IOCTL_INFO(VIDIOC_G_MODULATOR, 0),
+ IOCTL_INFO(VIDIOC_S_MODULATOR, 0),
+ IOCTL_INFO(VIDIOC_G_FREQUENCY, 0),
+ IOCTL_INFO(VIDIOC_S_FREQUENCY, 0),
+ IOCTL_INFO(VIDIOC_CROPCAP, 0),
+ IOCTL_INFO(VIDIOC_G_CROP, 0),
+ IOCTL_INFO(VIDIOC_S_CROP, 0),
+ IOCTL_INFO(VIDIOC_G_SELECTION, 0),
+ IOCTL_INFO(VIDIOC_S_SELECTION, 0),
+ IOCTL_INFO(VIDIOC_G_JPEGCOMP, 0),
+ IOCTL_INFO(VIDIOC_S_JPEGCOMP, 0),
+ IOCTL_INFO(VIDIOC_QUERYSTD, 0),
+ IOCTL_INFO(VIDIOC_TRY_FMT, 0),
+ IOCTL_INFO(VIDIOC_ENUMAUDIO, 0),
+ IOCTL_INFO(VIDIOC_ENUMAUDOUT, 0),
+ IOCTL_INFO(VIDIOC_G_PRIORITY, 0),
+ IOCTL_INFO(VIDIOC_S_PRIORITY, 0),
+ IOCTL_INFO(VIDIOC_G_SLICED_VBI_CAP, 0),
+ IOCTL_INFO(VIDIOC_LOG_STATUS, 0),
+ IOCTL_INFO(VIDIOC_G_EXT_CTRLS, INFO_FL_CTRL),
+ IOCTL_INFO(VIDIOC_S_EXT_CTRLS, INFO_FL_CTRL),
+ IOCTL_INFO(VIDIOC_TRY_EXT_CTRLS, 0),
+ IOCTL_INFO(VIDIOC_ENUM_FRAMESIZES, 0),
+ IOCTL_INFO(VIDIOC_ENUM_FRAMEINTERVALS, 0),
+ IOCTL_INFO(VIDIOC_G_ENC_INDEX, 0),
+ IOCTL_INFO(VIDIOC_ENCODER_CMD, 0),
+ IOCTL_INFO(VIDIOC_TRY_ENCODER_CMD, 0),
+ IOCTL_INFO(VIDIOC_DECODER_CMD, 0),
+ IOCTL_INFO(VIDIOC_TRY_DECODER_CMD, 0),
+ IOCTL_INFO(VIDIOC_DBG_S_REGISTER, 0),
+ IOCTL_INFO(VIDIOC_DBG_G_REGISTER, 0),
+ IOCTL_INFO(VIDIOC_DBG_G_CHIP_IDENT, 0),
+ IOCTL_INFO(VIDIOC_S_HW_FREQ_SEEK, 0),
+ IOCTL_INFO(VIDIOC_ENUM_DV_PRESETS, 0),
+ IOCTL_INFO(VIDIOC_S_DV_PRESET, 0),
+ IOCTL_INFO(VIDIOC_G_DV_PRESET, 0),
+ IOCTL_INFO(VIDIOC_QUERY_DV_PRESET, 0),
+ IOCTL_INFO(VIDIOC_S_DV_TIMINGS, 0),
+ IOCTL_INFO(VIDIOC_G_DV_TIMINGS, 0),
+ IOCTL_INFO(VIDIOC_DQEVENT, 0),
+ IOCTL_INFO(VIDIOC_SUBSCRIBE_EVENT, 0),
+ IOCTL_INFO(VIDIOC_UNSUBSCRIBE_EVENT, 0),
+ IOCTL_INFO(VIDIOC_CREATE_BUFS, 0),
+ IOCTL_INFO(VIDIOC_PREPARE_BUF, 0),
};
#define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
@@ -526,19 +518,28 @@ static long __video_do_ioctl(struct file *file,
return ret;
}
- if ((vfd->debug& V4L2_DEBUG_IOCTL)&&
- !(vfd->debug& V4L2_DEBUG_IOCTL_ARG)) {
- v4l_print_ioctl(vfd->name, cmd);
- printk(KERN_CONT "\n");
- }
-
if (test_bit(V4L2_FL_USES_V4L2_FH,&vfd->flags)) {
vfh = file->private_data;
use_fh_prio = test_bit(V4L2_FL_USE_FH_PRIO,&vfd->flags);
+ if (use_fh_prio)
+ ret_prio = v4l2_prio_check(vfd->prio, vfh->prio);
}
- if (use_fh_prio)
- ret_prio = v4l2_prio_check(vfd->prio, vfh->prio);
+ if (v4l2_is_valid_ioctl(cmd)) {
I would prefer for this check to be the first check in the function
in the form of:
if (!v4l2_is_valid_ioctl(cmd))
return -ENOTTY;
This will drop an indentation level from the code below and also drop an
indentation level from the prio check introduced in a later patch,
making the end result much more readable IMHO.
+ struct v4l2_ioctl_info *info =&v4l2_ioctls[_IOC_NR(cmd)];
+
+ if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls)) {
+ if (!(info->flags& INFO_FL_CTRL) ||
+ !(vfh&& vfh->ctrl_handler))
+ return -ENOTTY;
> + }
> + }
Sort of hard to read, IMHO the below is easier to parse by us humans:
if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) &&
!((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler))
return -ENOTTY;
Note lots of more patch below, on which I've no further comments.
Regards,
Hans
+
+ if ((vfd->debug& V4L2_DEBUG_IOCTL)&&
+ !(vfd->debug& V4L2_DEBUG_IOCTL_ARG)) {
+ v4l_print_ioctl(vfd->name, cmd);
+ printk(KERN_CONT "\n");
+ }
switch (cmd) {
@@ -547,9 +548,6 @@ static long __video_do_ioctl(struct file *file,
{
struct v4l2_capability *cap = (struct v4l2_capability *)arg;
- if (!ops->vidioc_querycap)
- break;
-
cap->version = LINUX_VERSION_CODE;
ret = ops->vidioc_querycap(file, fh, cap);
if (!ret)
@@ -600,6 +598,7 @@ static long __video_do_ioctl(struct file *file,
{
struct v4l2_fmtdesc *f = arg;
+ ret = -EINVAL;
switch (f->type) {
case V4L2_BUF_TYPE_VIDEO_CAPTURE:
if (likely(ops->vidioc_enum_fmt_vid_cap))
@@ -632,7 +631,7 @@ static long __video_do_ioctl(struct file *file,
default:
break;
}
- if (likely (!ret))
+ if (likely(!ret))
dbgarg(cmd, "index=%d, type=%d, flags=%d, "
"pixelformat=%c%c%c%c, description='%s'\n",
f->index, f->type, f->flags,
@@ -641,14 +640,6 @@ static long __video_do_ioctl(struct file *file,
(f->pixelformat>> 16)& 0xff,
(f->pixelformat>> 24)& 0xff,
f->description);
- else if (ret == -ENOTTY&&
- (ops->vidioc_enum_fmt_vid_cap ||
- ops->vidioc_enum_fmt_vid_out ||
- ops->vidioc_enum_fmt_vid_cap_mplane ||
- ops->vidioc_enum_fmt_vid_out_mplane ||
- ops->vidioc_enum_fmt_vid_overlay ||
- ops->vidioc_enum_fmt_type_private))
- ret = -EINVAL;
break;
}
case VIDIOC_G_FMT:
@@ -658,6 +649,7 @@ static long __video_do_ioctl(struct file *file,
/* FIXME: Should be one dump per type */
dbgarg(cmd, "type=%s\n", prt_names(f->type, v4l2_type_names));
+ ret = -EINVAL;
switch (f->type) {
case V4L2_BUF_TYPE_VIDEO_CAPTURE:
if (ops->vidioc_g_fmt_vid_cap)
@@ -719,17 +711,12 @@ static long __video_do_ioctl(struct file *file,
fh, f);
break;
}
- if (unlikely(ret == -ENOTTY&& have_fmt_ops(g)))
- ret = -EINVAL;
-
break;
}
case VIDIOC_S_FMT:
{
struct v4l2_format *f = (struct v4l2_format *)arg;
- if (!have_fmt_ops(s))
- break;
if (ret_prio) {
ret = ret_prio;
break;
@@ -817,6 +804,7 @@ static long __video_do_ioctl(struct file *file,
/* FIXME: Should be one dump per type */
dbgarg(cmd, "type=%s\n", prt_names(f->type,
v4l2_type_names));
+ ret = -EINVAL;
switch (f->type) {
case V4L2_BUF_TYPE_VIDEO_CAPTURE:
CLEAR_AFTER_FIELD(f, fmt.pix);
@@ -889,8 +877,6 @@ static long __video_do_ioctl(struct file *file,
fh, f);
break;
}
- if (unlikely(ret == -ENOTTY&& have_fmt_ops(try)))
- ret = -EINVAL;
break;
}
/* FIXME: Those buf reqs could be handled here,
@@ -901,8 +887,6 @@ static long __video_do_ioctl(struct file *file,
{
struct v4l2_requestbuffers *p = arg;
- if (!ops->vidioc_reqbufs)
- break;
if (ret_prio) {
ret = ret_prio;
break;
@@ -925,8 +909,6 @@ static long __video_do_ioctl(struct file *file,
{
struct v4l2_buffer *p = arg;
- if (!ops->vidioc_querybuf)
- break;
ret = check_fmt(ops, p->type);
if (ret)
break;
@@ -940,8 +922,6 @@ static long __video_do_ioctl(struct file *file,
{
struct v4l2_buffer *p = arg;
- if (!ops->vidioc_qbuf)
- break;
ret = check_fmt(ops, p->type);
if (ret)
break;
@@ -955,8 +935,6 @@ static long __video_do_ioctl(struct file *file,
{
struct v4l2_buffer *p = arg;
- if (!ops->vidioc_dqbuf)
- break;
ret = check_fmt(ops, p->type);
if (ret)
break;
@@ -970,8 +948,6 @@ static long __video_do_ioctl(struct file *file,
{
int *i = arg;
- if (!ops->vidioc_overlay)
- break;
if (ret_prio) {
ret = ret_prio;
break;
@@ -984,8 +960,6 @@ static long __video_do_ioctl(struct file *file,
{
struct v4l2_framebuffer *p = arg;
- if (!ops->vidioc_g_fbuf)
- break;
ret = ops->vidioc_g_fbuf(file, fh, arg);
if (!ret) {
dbgarg(cmd, "capability=0x%x, flags=%d, base=0x%08lx\n",
@@ -999,8 +973,6 @@ static long __video_do_ioctl(struct file *file,
{
struct v4l2_framebuffer *p = arg;
- if (!ops->vidioc_s_fbuf)
- break;
if (ret_prio) {
ret = ret_prio;
break;
@@ -1015,8 +987,6 @@ static long __video_do_ioctl(struct file *file,
{
enum v4l2_buf_type i = *(int *)arg;
- if (!ops->vidioc_streamon)
- break;
if (ret_prio) {
ret = ret_prio;
break;
@@ -1029,8 +999,6 @@ static long __video_do_ioctl(struct file *file,
{
enum v4l2_buf_type i = *(int *)arg;
- if (!ops->vidioc_streamoff)
- break;
if (ret_prio) {
ret = ret_prio;
break;
@@ -1104,9 +1072,6 @@ static long __video_do_ioctl(struct file *file,
dbgarg(cmd, "std=%08Lx\n", (long long unsigned)*id);
- if (!ops->vidioc_s_std)
- break;
-
if (ret_prio) {
ret = ret_prio;
break;
@@ -1128,8 +1093,6 @@ static long __video_do_ioctl(struct file *file,
{
v4l2_std_id *p = arg;
- if (!ops->vidioc_querystd)
- break;
/*
* If nothing detected, it should return all supported
* Drivers just need to mask the std argument, in order
@@ -1163,9 +1126,6 @@ static long __video_do_ioctl(struct file *file,
if (ops->vidioc_s_dv_timings)
p->capabilities |= V4L2_IN_CAP_CUSTOM_TIMINGS;
- if (!ops->vidioc_enum_input)
- break;
-
ret = ops->vidioc_enum_input(file, fh, p);
if (!ret)
dbgarg(cmd, "index=%d, name=%s, type=%d, "
@@ -1181,8 +1141,6 @@ static long __video_do_ioctl(struct file *file,
{
unsigned int *i = arg;
- if (!ops->vidioc_g_input)
- break;
ret = ops->vidioc_g_input(file, fh, i);
if (!ret)
dbgarg(cmd, "value=%d\n", *i);
@@ -1192,8 +1150,6 @@ static long __video_do_ioctl(struct file *file,
{
unsigned int *i = arg;
- if (!ops->vidioc_s_input)
- break;
if (ret_prio) {
ret = ret_prio;
break;
@@ -1208,9 +1164,6 @@ static long __video_do_ioctl(struct file *file,
{
struct v4l2_output *p = arg;
- if (!ops->vidioc_enum_output)
- break;
-
/*
* We set the flags for CAP_PRESETS, CAP_CUSTOM_TIMINGS&
* CAP_STD here based on ioctl handler provided by the
@@ -1237,8 +1190,6 @@ static long __video_do_ioctl(struct file *file,
{
unsigned int *i = arg;
- if (!ops->vidioc_g_output)
- break;
ret = ops->vidioc_g_output(file, fh, i);
if (!ret)
dbgarg(cmd, "value=%d\n", *i);
@@ -1248,8 +1199,6 @@ static long __video_do_ioctl(struct file *file,
{
unsigned int *i = arg;
- if (!ops->vidioc_s_output)
- break;
if (ret_prio) {
ret = ret_prio;
break;
@@ -1441,8 +1390,6 @@ static long __video_do_ioctl(struct file *file,
{
struct v4l2_audio *p = arg;
- if (!ops->vidioc_enumaudio)
- break;
ret = ops->vidioc_enumaudio(file, fh, p);
if (!ret)
dbgarg(cmd, "index=%d, name=%s, capability=0x%x, "
@@ -1456,9 +1403,6 @@ static long __video_do_ioctl(struct file *file,
{
struct v4l2_audio *p = arg;
- if (!ops->vidioc_g_audio)
- break;
-
ret = ops->vidioc_g_audio(file, fh, p);
if (!ret)
dbgarg(cmd, "index=%d, name=%s, capability=0x%x, "
@@ -1472,8 +1416,6 @@ static long __video_do_ioctl(struct file *file,
{
struct v4l2_audio *p = arg;
- if (!ops->vidioc_s_audio)
- break;
if (ret_prio) {
ret = ret_prio;
break;
@@ -1488,8 +1430,6 @@ static long __video_do_ioctl(struct file *file,
{
struct v4l2_audioout *p = arg;
- if (!ops->vidioc_enumaudout)
- break;
dbgarg(cmd, "Enum for index=%d\n", p->index);
ret = ops->vidioc_enumaudout(file, fh, p);
if (!ret)
@@ -1502,9 +1442,6 @@ static long __video_do_ioctl(struct file *file,
{
struct v4l2_audioout *p = arg;
- if (!ops->vidioc_g_audout)
- break;
-
ret = ops->vidioc_g_audout(file, fh, p);
if (!ret)
dbgarg2("index=%d, name=%s, capability=%d, "
@@ -1516,8 +1453,6 @@ static long __video_do_ioctl(struct file *file,
{
struct v4l2_audioout *p = arg;
- if (!ops->vidioc_s_audout)
- break;
if (ret_prio) {
ret = ret_prio;
break;
@@ -1533,8 +1468,6 @@ static long __video_do_ioctl(struct file *file,
{
struct v4l2_modulator *p = arg;
- if (!ops->vidioc_g_modulator)
- break;
ret = ops->vidioc_g_modulator(file, fh, p);
if (!ret)
dbgarg(cmd, "index=%d, name=%s, "
@@ -1549,8 +1482,6 @@ static long __video_do_ioctl(struct file *file,
{
struct v4l2_modulator *p = arg;
- if (!ops->vidioc_s_modulator)
- break;
if (ret_prio) {
ret = ret_prio;
break;
@@ -1566,9 +1497,6 @@ static long __video_do_ioctl(struct file *file,
{
struct v4l2_crop *p = arg;
- if (!ops->vidioc_g_crop&& !ops->vidioc_g_selection)
- break;
-
dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
if (ops->vidioc_g_crop) {
@@ -1600,9 +1528,6 @@ static long __video_do_ioctl(struct file *file,
{
struct v4l2_crop *p = arg;
- if (!ops->vidioc_s_crop&& !ops->vidioc_s_selection)
- break;
-
if (ret_prio) {
ret = ret_prio;
break;
@@ -1633,9 +1558,6 @@ static long __video_do_ioctl(struct file *file,
{
struct v4l2_selection *p = arg;
- if (!ops->vidioc_g_selection)
- break;
-
dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
ret = ops->vidioc_g_selection(file, fh, p);
@@ -1647,9 +1569,6 @@ static long __video_do_ioctl(struct file *file,
{
struct v4l2_selection *p = arg;
- if (!ops->vidioc_s_selection)
- break;
-
if (ret_prio) {
ret = ret_prio;
break;
@@ -1666,9 +1585,6 @@ static long __video_do_ioctl(struct file *file,
struct v4l2_cropcap *p = arg;
/*FIXME: Should also show v4l2_fract pixelaspect */
- if (!ops->vidioc_cropcap&& !ops->vidioc_g_selection)
- break;
-
dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
if (ops->vidioc_cropcap) {
ret = ops->vidioc_cropcap(file, fh, p);
@@ -1712,9 +1628,6 @@ static long __video_do_ioctl(struct file *file,
{
struct v4l2_jpegcompression *p = arg;
- if (!ops->vidioc_g_jpegcomp)
- break;
-
ret = ops->vidioc_g_jpegcomp(file, fh, p);
if (!ret)
dbgarg(cmd, "quality=%d, APPn=%d, "
@@ -1728,8 +1641,6 @@ static long __video_do_ioctl(struct file *file,
{
struct v4l2_jpegcompression *p = arg;
- if (!ops->vidioc_g_jpegcomp)
- break;
if (ret_prio) {
ret = ret_prio;
break;
@@ -1745,8 +1656,6 @@ static long __video_do_ioctl(struct file *file,
{
struct v4l2_enc_idx *p = arg;
- if (!ops->vidioc_g_enc_index)
- break;
ret = ops->vidioc_g_enc_index(file, fh, p);
if (!ret)
dbgarg(cmd, "entries=%d, entries_cap=%d\n",
@@ -1757,8 +1666,6 @@ static long __video_do_ioctl(struct file *file,
{
struct v4l2_encoder_cmd *p = arg;
- if (!ops->vidioc_encoder_cmd)
- break;
if (ret_prio) {
ret = ret_prio;
break;
@@ -1772,8 +1679,6 @@ static long __video_do_ioctl(struct file *file,
{
struct v4l2_encoder_cmd *p = arg;
- if (!ops->vidioc_try_encoder_cmd)
- break;
ret = ops->vidioc_try_encoder_cmd(file, fh, p);
if (!ret)
dbgarg(cmd, "cmd=%d, flags=%x\n", p->cmd, p->flags);
@@ -1783,8 +1688,6 @@ static long __video_do_ioctl(struct file *file,
{
struct v4l2_decoder_cmd *p = arg;
- if (!ops->vidioc_decoder_cmd)
- break;
if (ret_prio) {
ret = ret_prio;
break;
@@ -1798,8 +1701,6 @@ static long __video_do_ioctl(struct file *file,
{
struct v4l2_decoder_cmd *p = arg;
- if (!ops->vidioc_try_decoder_cmd)
- break;
ret = ops->vidioc_try_decoder_cmd(file, fh, p);
if (!ret)
dbgarg(cmd, "cmd=%d, flags=%x\n", p->cmd, p->flags);
@@ -1809,8 +1710,6 @@ static long __video_do_ioctl(struct file *file,
{
struct v4l2_streamparm *p = arg;
- if (!ops->vidioc_g_parm&& !vfd->current_norm)
- break;
if (ops->vidioc_g_parm) {
ret = check_fmt(ops, p->type);
if (ret)
@@ -1838,8 +1737,6 @@ static long __video_do_ioctl(struct file *file,
{
struct v4l2_streamparm *p = arg;
- if (!ops->vidioc_s_parm)
- break;
if (ret_prio) {
ret = ret_prio;
break;
@@ -1856,9 +1753,6 @@ static long __video_do_ioctl(struct file *file,
{
struct v4l2_tuner *p = arg;
- if (!ops->vidioc_g_tuner)
- break;
-
p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
ret = ops->vidioc_g_tuner(file, fh, p);
@@ -1877,8 +1771,6 @@ static long __video_do_ioctl(struct file *file,
{
struct v4l2_tuner *p = arg;
- if (!ops->vidioc_s_tuner)
- break;
if (ret_prio) {
ret = ret_prio;
break;
@@ -1900,9 +1792,6 @@ static long __video_do_ioctl(struct file *file,
{
struct v4l2_frequency *p = arg;
- if (!ops->vidioc_g_frequency)
- break;
-
p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
ret = ops->vidioc_g_frequency(file, fh, p);
@@ -1916,8 +1805,6 @@ static long __video_do_ioctl(struct file *file,
struct v4l2_frequency *p = arg;
enum v4l2_tuner_type type;
- if (!ops->vidioc_s_frequency)
- break;
if (ret_prio) {
ret = ret_prio;
break;
@@ -1936,9 +1823,6 @@ static long __video_do_ioctl(struct file *file,
{
struct v4l2_sliced_vbi_cap *p = arg;
- if (!ops->vidioc_g_sliced_vbi_cap)
- break;
-
/* Clear up to type, everything after type is zerod already */
memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
@@ -1950,8 +1834,6 @@ static long __video_do_ioctl(struct file *file,
}
case VIDIOC_LOG_STATUS:
{
- if (!ops->vidioc_log_status)
- break;
if (vfd->v4l2_dev)
pr_info("%s: ================= START STATUS =================\n",
vfd->v4l2_dev->name);
@@ -1966,12 +1848,10 @@ static long __video_do_ioctl(struct file *file,
#ifdef CONFIG_VIDEO_ADV_DEBUG
struct v4l2_dbg_register *p = arg;
- if (ops->vidioc_g_register) {
- if (!capable(CAP_SYS_ADMIN))
- ret = -EPERM;
- else
- ret = ops->vidioc_g_register(file, fh, p);
- }
+ if (!capable(CAP_SYS_ADMIN))
+ ret = -EPERM;
+ else
+ ret = ops->vidioc_g_register(file, fh, p);
#endif
break;
}
@@ -1980,12 +1860,10 @@ static long __video_do_ioctl(struct file *file,
#ifdef CONFIG_VIDEO_ADV_DEBUG
struct v4l2_dbg_register *p = arg;
- if (ops->vidioc_s_register) {
- if (!capable(CAP_SYS_ADMIN))
- ret = -EPERM;
- else
- ret = ops->vidioc_s_register(file, fh, p);
- }
+ if (!capable(CAP_SYS_ADMIN))
+ ret = -EPERM;
+ else
+ ret = ops->vidioc_s_register(file, fh, p);
#endif
break;
}
@@ -1993,8 +1871,6 @@ static long __video_do_ioctl(struct file *file,
{
struct v4l2_dbg_chip_ident *p = arg;
- if (!ops->vidioc_g_chip_ident)
- break;
p->ident = V4L2_IDENT_NONE;
p->revision = 0;
ret = ops->vidioc_g_chip_ident(file, fh, p);
@@ -2007,8 +1883,6 @@ static long __video_do_ioctl(struct file *file,
struct v4l2_hw_freq_seek *p = arg;
enum v4l2_tuner_type type;
- if (!ops->vidioc_s_hw_freq_seek)
- break;
if (ret_prio) {
ret = ret_prio;
break;
@@ -2028,9 +1902,6 @@ static long __video_do_ioctl(struct file *file,
{
struct v4l2_frmsizeenum *p = arg;
- if (!ops->vidioc_enum_framesizes)
- break;
-
ret = ops->vidioc_enum_framesizes(file, fh, p);
dbgarg(cmd,
"index=%d, pixelformat=%c%c%c%c, type=%d ",
@@ -2064,9 +1935,6 @@ static long __video_do_ioctl(struct file *file,
{
struct v4l2_frmivalenum *p = arg;
- if (!ops->vidioc_enum_frameintervals)
- break;
-
ret = ops->vidioc_enum_frameintervals(file, fh, p);
dbgarg(cmd,
"index=%d, pixelformat=%d, width=%d, height=%d, type=%d ",
@@ -2099,9 +1967,6 @@ static long __video_do_ioctl(struct file *file,
{
struct v4l2_dv_enum_preset *p = arg;
- if (!ops->vidioc_enum_dv_presets)
- break;
-
ret = ops->vidioc_enum_dv_presets(file, fh, p);
if (!ret)
dbgarg(cmd,
@@ -2115,8 +1980,6 @@ static long __video_do_ioctl(struct file *file,
{
struct v4l2_dv_preset *p = arg;
- if (!ops->vidioc_s_dv_preset)
- break;
if (ret_prio) {
ret = ret_prio;
break;
@@ -2130,9 +1993,6 @@ static long __video_do_ioctl(struct file *file,
{
struct v4l2_dv_preset *p = arg;
- if (!ops->vidioc_g_dv_preset)
- break;
-
ret = ops->vidioc_g_dv_preset(file, fh, p);
if (!ret)
dbgarg(cmd, "preset=%d\n", p->preset);
@@ -2142,9 +2002,6 @@ static long __video_do_ioctl(struct file *file,
{
struct v4l2_dv_preset *p = arg;
- if (!ops->vidioc_query_dv_preset)
- break;
-
ret = ops->vidioc_query_dv_preset(file, fh, p);
if (!ret)
dbgarg(cmd, "preset=%d\n", p->preset);
@@ -2154,8 +2011,6 @@ static long __video_do_ioctl(struct file *file,
{
struct v4l2_dv_timings *p = arg;
- if (!ops->vidioc_s_dv_timings)
- break;
if (ret_prio) {
ret = ret_prio;
break;
@@ -2188,9 +2043,6 @@ static long __video_do_ioctl(struct file *file,
{
struct v4l2_dv_timings *p = arg;
- if (!ops->vidioc_g_dv_timings)
- break;
-
ret = ops->vidioc_g_dv_timings(file, fh, p);
if (!ret) {
switch (p->type) {
@@ -2222,9 +2074,6 @@ static long __video_do_ioctl(struct file *file,
{
struct v4l2_event *ev = arg;
- if (!ops->vidioc_subscribe_event)
- break;
-
ret = v4l2_event_dequeue(fh, ev, file->f_flags& O_NONBLOCK);
if (ret< 0) {
dbgarg(cmd, "no pending events?");
@@ -2241,9 +2090,6 @@ static long __video_do_ioctl(struct file *file,
{
struct v4l2_event_subscription *sub = arg;
- if (!ops->vidioc_subscribe_event)
- break;
-
ret = ops->vidioc_subscribe_event(fh, sub);
if (ret< 0) {
dbgarg(cmd, "failed, ret=%ld", ret);
@@ -2256,9 +2102,6 @@ static long __video_do_ioctl(struct file *file,
{
struct v4l2_event_subscription *sub = arg;
- if (!ops->vidioc_unsubscribe_event)
- break;
-
ret = ops->vidioc_unsubscribe_event(fh, sub);
if (ret< 0) {
dbgarg(cmd, "failed, ret=%ld", ret);
@@ -2271,8 +2114,6 @@ static long __video_do_ioctl(struct file *file,
{
struct v4l2_create_buffers *create = arg;
- if (!ops->vidioc_create_bufs)
- break;
if (ret_prio) {
ret = ret_prio;
break;
@@ -2290,8 +2131,6 @@ static long __video_do_ioctl(struct file *file,
{
struct v4l2_buffer *b = arg;
- if (!ops->vidioc_prepare_buf)
- break;
ret = check_fmt(ops, b->type);
if (ret)
break;
diff --git a/include/media/v4l2-dev.h b/include/media/v4l2-dev.h
index 0da84dc..15e2fe4 100644
--- a/include/media/v4l2-dev.h
+++ b/include/media/v4l2-dev.h
@@ -126,6 +126,7 @@ struct video_device
/* ioctl callbacks */
const struct v4l2_ioctl_ops *ioctl_ops;
+ DECLARE_BITMAP(valid_ioctls, BASE_VIDIOC_PRIVATE);
/* serialization lock */
DECLARE_BITMAP(dont_use_lock, BASE_VIDIOC_PRIVATE);
@@ -184,6 +185,16 @@ static inline void v4l2_dont_use_lock(struct video_device *vdev, unsigned int cm
set_bit(_IOC_NR(cmd), vdev->dont_use_lock);
}
+/* Mark that this command isn't implemented, must be called before
+ video_device_register. See also the comments in determine_valid_ioctls().
+ This function allows drivers to provide just one v4l2_ioctl_ops struct, but
+ disable ioctls based on the specific card that is actually found. */
+static inline void v4l2_dont_use_cmd(struct video_device *vdev, unsigned int cmd)
+{
+ if (_IOC_NR(cmd)< BASE_VIDIOC_PRIVATE)
+ set_bit(_IOC_NR(cmd), vdev->valid_ioctls);
+}
+
/* helper functions to access driver private data. */
static inline void *video_get_drvdata(struct video_device *vdev)
{
--
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