| Message ID | 20210326095840.364424-2-ribalda@chromium.org |
|---|---|
| State | Superseded |
| Headers | show |
| Series | [v9,01/22] media: v4l2-ioctl: Fix check_ext_ctrls | expand |
Hi Ricardo, Thank you for the patch. On Fri, Mar 26, 2021 at 10:58:19AM +0100, Ricardo Ribalda wrote: > Drivers that do not use the ctrl-framework use this function instead. > > Fix the following issues: > > - Do not check for multiple classes when getting the DEF_VAL. > - Return -EINVAL for request_api calls > - Default value cannot be changed, return EINVAL as soon as possible. > - Return the right error_idx > [If an error is found when validating the list of controls passed with > VIDIOC_G_EXT_CTRLS, then error_idx shall be set to ctrls->count to > indicate to userspace that no actual hardware was touched. > It would have been much nicer of course if error_idx could point to the > control index that failed the validation, but sadly that's not how the > API was designed.] > > Fixes v4l2-compliance: > Control ioctls (Input 0): > warn: v4l2-test-controls.cpp(834): error_idx should be equal to count > warn: v4l2-test-controls.cpp(855): error_idx should be equal to count > fail: v4l2-test-controls.cpp(813): doioctl(node, VIDIOC_G_EXT_CTRLS, &ctrls) > test VIDIOC_G/S/TRY_EXT_CTRLS: FAIL > Buffer ioctls (Input 0): > fail: v4l2-test-buffers.cpp(1994): ret != EINVAL && ret != EBADR && ret != ENOTTY > test Requests: FAIL > > Cc: stable@vger.kernel.org > Fixes: 6fa6f831f095 ("media: v4l2-ctrls: add core request support") > Suggested-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> > Reviewed-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> > Signed-off-by: Ricardo Ribalda <ribalda@chromium.org> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> > --- > drivers/media/v4l2-core/v4l2-ioctl.c | 60 ++++++++++++++++++---------- > 1 file changed, 39 insertions(+), 21 deletions(-) > > diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c > index 31d1342e61e8..7b5ebdd329e8 100644 > --- a/drivers/media/v4l2-core/v4l2-ioctl.c > +++ b/drivers/media/v4l2-core/v4l2-ioctl.c > @@ -908,7 +908,7 @@ static void v4l_print_default(const void *arg, bool write_only) > pr_cont("driver-specific ioctl\n"); > } > > -static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv) > +static bool check_ext_ctrls(struct v4l2_ext_controls *c, unsigned long ioctl) > { > __u32 i; > > @@ -917,23 +917,41 @@ static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv) > for (i = 0; i < c->count; i++) > c->controls[i].reserved2[0] = 0; > > - /* V4L2_CID_PRIVATE_BASE cannot be used as control class > - when using extended controls. > - Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL > - is it allowed for backwards compatibility. > - */ > - if (!allow_priv && c->which == V4L2_CID_PRIVATE_BASE) > - return 0; > - if (!c->which) > - return 1; > + switch (c->which) { > + case V4L2_CID_PRIVATE_BASE: > + /* > + * V4L2_CID_PRIVATE_BASE cannot be used as control class > + * when using extended controls. > + * Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL > + * is it allowed for backwards compatibility. > + */ > + if (ioctl == VIDIOC_G_CTRL || ioctl == VIDIOC_S_CTRL) > + return false; > + break; > + case V4L2_CTRL_WHICH_DEF_VAL: > + /* Default value cannot be changed */ > + if (ioctl == VIDIOC_S_EXT_CTRLS || > + ioctl == VIDIOC_TRY_EXT_CTRLS) { > + c->error_idx = c->count; > + return false; > + } > + return true; > + case V4L2_CTRL_WHICH_CUR_VAL: > + return true; > + case V4L2_CTRL_WHICH_REQUEST_VAL: > + c->error_idx = c->count; > + return false; > + } > + > /* Check that all controls are from the same control class. */ > for (i = 0; i < c->count; i++) { > if (V4L2_CTRL_ID2WHICH(c->controls[i].id) != c->which) { > - c->error_idx = i; > - return 0; > + c->error_idx = ioctl == VIDIOC_TRY_EXT_CTRLS ? i : > + c->count; > + return false; > } > } > - return 1; > + return true; > } > > static int check_fmt(struct file *file, enum v4l2_buf_type type) > @@ -2229,7 +2247,7 @@ static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops, > ctrls.controls = &ctrl; > ctrl.id = p->id; > ctrl.value = p->value; > - if (check_ext_ctrls(&ctrls, 1)) { > + if (check_ext_ctrls(&ctrls, VIDIOC_G_CTRL)) { > int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls); > > if (ret == 0) > @@ -2263,7 +2281,7 @@ static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops, > ctrls.controls = &ctrl; > ctrl.id = p->id; > ctrl.value = p->value; > - if (check_ext_ctrls(&ctrls, 1)) > + if (check_ext_ctrls(&ctrls, VIDIOC_S_CTRL)) > return ops->vidioc_s_ext_ctrls(file, fh, &ctrls); > return -EINVAL; > } > @@ -2285,8 +2303,8 @@ static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops, > vfd, vfd->v4l2_dev->mdev, p); > if (ops->vidioc_g_ext_ctrls == NULL) > return -ENOTTY; > - return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) : > - -EINVAL; > + return check_ext_ctrls(p, VIDIOC_G_EXT_CTRLS) ? > + ops->vidioc_g_ext_ctrls(file, fh, p) : -EINVAL; > } > > static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops, > @@ -2306,8 +2324,8 @@ static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops, > vfd, vfd->v4l2_dev->mdev, p); > if (ops->vidioc_s_ext_ctrls == NULL) > return -ENOTTY; > - return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) : > - -EINVAL; > + return check_ext_ctrls(p, VIDIOC_S_EXT_CTRLS) ? > + ops->vidioc_s_ext_ctrls(file, fh, p) : -EINVAL; > } > > static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops, > @@ -2327,8 +2345,8 @@ static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops, > vfd, vfd->v4l2_dev->mdev, p); > if (ops->vidioc_try_ext_ctrls == NULL) > return -ENOTTY; > - return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) : > - -EINVAL; > + return check_ext_ctrls(p, VIDIOC_TRY_EXT_CTRLS) ? > + ops->vidioc_try_ext_ctrls(file, fh, p) : -EINVAL; > } > > /* -- Regards, Laurent Pinchart
diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c index 31d1342e61e8..7b5ebdd329e8 100644 --- a/drivers/media/v4l2-core/v4l2-ioctl.c +++ b/drivers/media/v4l2-core/v4l2-ioctl.c @@ -908,7 +908,7 @@ static void v4l_print_default(const void *arg, bool write_only) pr_cont("driver-specific ioctl\n"); } -static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv) +static bool check_ext_ctrls(struct v4l2_ext_controls *c, unsigned long ioctl) { __u32 i; @@ -917,23 +917,41 @@ static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv) for (i = 0; i < c->count; i++) c->controls[i].reserved2[0] = 0; - /* V4L2_CID_PRIVATE_BASE cannot be used as control class - when using extended controls. - Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL - is it allowed for backwards compatibility. - */ - if (!allow_priv && c->which == V4L2_CID_PRIVATE_BASE) - return 0; - if (!c->which) - return 1; + switch (c->which) { + case V4L2_CID_PRIVATE_BASE: + /* + * V4L2_CID_PRIVATE_BASE cannot be used as control class + * when using extended controls. + * Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL + * is it allowed for backwards compatibility. + */ + if (ioctl == VIDIOC_G_CTRL || ioctl == VIDIOC_S_CTRL) + return false; + break; + case V4L2_CTRL_WHICH_DEF_VAL: + /* Default value cannot be changed */ + if (ioctl == VIDIOC_S_EXT_CTRLS || + ioctl == VIDIOC_TRY_EXT_CTRLS) { + c->error_idx = c->count; + return false; + } + return true; + case V4L2_CTRL_WHICH_CUR_VAL: + return true; + case V4L2_CTRL_WHICH_REQUEST_VAL: + c->error_idx = c->count; + return false; + } + /* Check that all controls are from the same control class. */ for (i = 0; i < c->count; i++) { if (V4L2_CTRL_ID2WHICH(c->controls[i].id) != c->which) { - c->error_idx = i; - return 0; + c->error_idx = ioctl == VIDIOC_TRY_EXT_CTRLS ? i : + c->count; + return false; } } - return 1; + return true; } static int check_fmt(struct file *file, enum v4l2_buf_type type) @@ -2229,7 +2247,7 @@ static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops, ctrls.controls = &ctrl; ctrl.id = p->id; ctrl.value = p->value; - if (check_ext_ctrls(&ctrls, 1)) { + if (check_ext_ctrls(&ctrls, VIDIOC_G_CTRL)) { int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls); if (ret == 0) @@ -2263,7 +2281,7 @@ static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops, ctrls.controls = &ctrl; ctrl.id = p->id; ctrl.value = p->value; - if (check_ext_ctrls(&ctrls, 1)) + if (check_ext_ctrls(&ctrls, VIDIOC_S_CTRL)) return ops->vidioc_s_ext_ctrls(file, fh, &ctrls); return -EINVAL; } @@ -2285,8 +2303,8 @@ static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops, vfd, vfd->v4l2_dev->mdev, p); if (ops->vidioc_g_ext_ctrls == NULL) return -ENOTTY; - return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) : - -EINVAL; + return check_ext_ctrls(p, VIDIOC_G_EXT_CTRLS) ? + ops->vidioc_g_ext_ctrls(file, fh, p) : -EINVAL; } static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops, @@ -2306,8 +2324,8 @@ static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops, vfd, vfd->v4l2_dev->mdev, p); if (ops->vidioc_s_ext_ctrls == NULL) return -ENOTTY; - return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) : - -EINVAL; + return check_ext_ctrls(p, VIDIOC_S_EXT_CTRLS) ? + ops->vidioc_s_ext_ctrls(file, fh, p) : -EINVAL; } static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops, @@ -2327,8 +2345,8 @@ static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops, vfd, vfd->v4l2_dev->mdev, p); if (ops->vidioc_try_ext_ctrls == NULL) return -ENOTTY; - return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) : - -EINVAL; + return check_ext_ctrls(p, VIDIOC_TRY_EXT_CTRLS) ? + ops->vidioc_try_ext_ctrls(file, fh, p) : -EINVAL; } /*
Drivers that do not use the ctrl-framework use this function instead. Fix the following issues: - Do not check for multiple classes when getting the DEF_VAL. - Return -EINVAL for request_api calls - Default value cannot be changed, return EINVAL as soon as possible. - Return the right error_idx [If an error is found when validating the list of controls passed with VIDIOC_G_EXT_CTRLS, then error_idx shall be set to ctrls->count to indicate to userspace that no actual hardware was touched. It would have been much nicer of course if error_idx could point to the control index that failed the validation, but sadly that's not how the API was designed.] Fixes v4l2-compliance: Control ioctls (Input 0): warn: v4l2-test-controls.cpp(834): error_idx should be equal to count warn: v4l2-test-controls.cpp(855): error_idx should be equal to count fail: v4l2-test-controls.cpp(813): doioctl(node, VIDIOC_G_EXT_CTRLS, &ctrls) test VIDIOC_G/S/TRY_EXT_CTRLS: FAIL Buffer ioctls (Input 0): fail: v4l2-test-buffers.cpp(1994): ret != EINVAL && ret != EBADR && ret != ENOTTY test Requests: FAIL Cc: stable@vger.kernel.org Fixes: 6fa6f831f095 ("media: v4l2-ctrls: add core request support") Suggested-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Reviewed-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-by: Ricardo Ribalda <ribalda@chromium.org> --- drivers/media/v4l2-core/v4l2-ioctl.c | 60 ++++++++++++++++++---------- 1 file changed, 39 insertions(+), 21 deletions(-)