i_e2fs_nblock
ip->i_e2fs_nblock += btodb(fs->e2fs_bsize);
ip->i_e2fs_nblock -= btodb(deallocated);
if (blocksreleased >= oip->i_e2fs_nblock)
oip->i_e2fs_nblock = 0;
oip->i_e2fs_nblock -= blocksreleased;
ip->i_e2fs_mode = ip->i_e2fs_nblock = 0;
vap->va_bytes = dbtob((u_quad_t)ip->i_e2fs_nblock);