static int vbg_ioctl_hgcm_disconnect()

in vboxguest/vboxguest_core.c [1414:1451]

• 31 lines of code
• 9 McCabe index (conditional complexity)

static int vbg_ioctl_hgcm_disconnect(struct vbg_dev *gdev,
				     struct vbg_session *session,
				     struct vbg_ioctl_hgcm_disconnect *disconn)
{
	u32 client_id;
	int i, ret;

	if (vbg_ioctl_chk(&disconn->hdr, sizeof(disconn->u.in), 0))
		return -EINVAL;

	client_id = disconn->u.in.client_id;
	if (client_id == 0 || client_id == U32_MAX)
		return -EINVAL;

	mutex_lock(&gdev->session_mutex);
	for (i = 0; i < ARRAY_SIZE(session->hgcm_client_ids); i++) {
		if (session->hgcm_client_ids[i] == client_id) {
			session->hgcm_client_ids[i] = U32_MAX;
			break;
		}
	}
	mutex_unlock(&gdev->session_mutex);

	if (i >= ARRAY_SIZE(session->hgcm_client_ids))
		return -EINVAL;

	ret = vbg_hgcm_disconnect(gdev, session->requestor, client_id,
				  &disconn->hdr.rc);

	mutex_lock(&gdev->session_mutex);
	if (ret == 0 && disconn->hdr.rc >= 0)
		session->hgcm_client_ids[i] = 0;
	else
		session->hgcm_client_ids[i] = client_id;
	mutex_unlock(&gdev->session_mutex);

	return ret;
}