lfs_markv
int lfs_markv(struct lwp *, fsid_t *, struct block_info *, int);
if ((error = lfs_markv(l, &fsid, blkiov, blkcnt)) == 0)
if ((error = lfs_markv(l, &fsid, blkiov, blkcnt)) == 0) {
error = lfs_markv(l, fsidp, blkiov, blkcnt);
error = lfs_markv(l, fsidp, blkiov, blkcnt);