int vbg_core_ioctl()

in vboxguest/vboxguest_core.c [1679:1744]

• 52 lines of code
• 20 McCabe index (conditional complexity)

int vbg_core_ioctl(struct vbg_session *session, unsigned int req, void *data)
{
	unsigned int req_no_size = req & ~IOCSIZE_MASK;
	struct vbg_dev *gdev = session->gdev;
	struct vbg_ioctl_hdr *hdr = data;
	bool f32bit = false;

	hdr->rc = VINF_SUCCESS;
	if (!hdr->size_out)
		hdr->size_out = hdr->size_in;

	/*
	 * hdr->version and hdr->size_in / hdr->size_out minimum size are
	 * already checked by vbg_misc_device_ioctl().
	 */

	/* For VMMDEV_REQUEST hdr->type != VBG_IOCTL_HDR_TYPE_DEFAULT */
	if (req_no_size == VBG_IOCTL_VMMDEV_REQUEST(0) ||
	    req == VBG_IOCTL_VMMDEV_REQUEST_BIG ||
	    req == VBG_IOCTL_VMMDEV_REQUEST_BIG_ALT)
		return vbg_ioctl_vmmrequest(gdev, session, data);

	if (hdr->type != VBG_IOCTL_HDR_TYPE_DEFAULT)
		return -EINVAL;

	/* Fixed size requests. */
	switch (req) {
	case VBG_IOCTL_DRIVER_VERSION_INFO:
		return vbg_ioctl_driver_version_info(data);
	case VBG_IOCTL_HGCM_CONNECT:
		return vbg_ioctl_hgcm_connect(gdev, session, data);
	case VBG_IOCTL_HGCM_DISCONNECT:
		return vbg_ioctl_hgcm_disconnect(gdev, session, data);
	case VBG_IOCTL_WAIT_FOR_EVENTS:
		return vbg_ioctl_wait_for_events(gdev, session, data);
	case VBG_IOCTL_INTERRUPT_ALL_WAIT_FOR_EVENTS:
		return vbg_ioctl_interrupt_all_wait_events(gdev, session, data);
	case VBG_IOCTL_CHANGE_FILTER_MASK:
		return vbg_ioctl_change_filter_mask(gdev, session, data);
	case VBG_IOCTL_ACQUIRE_GUEST_CAPABILITIES:
		return vbg_ioctl_acquire_guest_capabilities(gdev, session, data);
	case VBG_IOCTL_CHANGE_GUEST_CAPABILITIES:
		return vbg_ioctl_change_guest_capabilities(gdev, session, data);
	case VBG_IOCTL_CHECK_BALLOON:
		return vbg_ioctl_check_balloon(gdev, data);
	case VBG_IOCTL_WRITE_CORE_DUMP:
		return vbg_ioctl_write_core_dump(gdev, session, data);
	}

	/* Variable sized requests. */
	switch (req_no_size) {
#ifdef CONFIG_COMPAT
	case VBG_IOCTL_HGCM_CALL_32(0):
		f32bit = true;
		fallthrough;
#endif
	case VBG_IOCTL_HGCM_CALL(0):
		return vbg_ioctl_hgcm_call(gdev, session, f32bit, data);
	case VBG_IOCTL_LOG(0):
	case VBG_IOCTL_LOG_ALT(0):
		return vbg_ioctl_log(data);
	}

	vbg_err_ratelimited("Userspace made an unknown ioctl req %#08x\n", req);
	return -ENOTTY;
}