static int vbg_ioctl_hgcm_connect()

in vboxguest/vboxguest_core.c [1375:1412]

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

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

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

	/* Find a free place in the sessions clients array and claim it */
	mutex_lock(&gdev->session_mutex);
	for (i = 0; i < ARRAY_SIZE(session->hgcm_client_ids); i++) {
		if (!session->hgcm_client_ids[i]) {
			session->hgcm_client_ids[i] = U32_MAX;
			break;
		}
	}
	mutex_unlock(&gdev->session_mutex);

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

	ret = vbg_hgcm_connect(gdev, session->requestor, &conn->u.in.loc,
			       &client_id, &conn->hdr.rc);

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

	return ret;
}