nfmalloc
ibuf = nfmalloc(oldsb->fs_bsize,"inode block buf");
cgs = nfmalloc(oldsb->fs_ncg * sizeof(*cgs), "cg pointers");
cgflags = nfmalloc(oldsb->fs_ncg, "cg flags");
csums = nfmalloc(oldsb->fs_cssize, "cg summary");