nlm_get_vfs_state
error = nlm_get_vfs_state(host, rqstp, &fh, &vs, accmode);
error = nlm_get_vfs_state(host, rqstp, &fh, &vs, accmode);
error = nlm_get_vfs_state(host, rqstp, &fh, &vs, (accmode_t)0);
error = nlm_get_vfs_state(host, rqstp, &fh, &vs, (accmode_t)0);