EXT2_NDIR_BLOCKS
EXT2_NDIR_BLOCKS, &ip->i_db[0], 0);
#define EXT2_IND_BLOCK EXT2_NDIR_BLOCKS
ip->i_ib[i] = le32toh(ei->e2di_blocks[EXT2_NDIR_BLOCKS + i]);
ei->e2di_blocks[EXT2_NDIR_BLOCKS + i] = htole32(ip->i_ib[i]);
for (i = used_blocks; i < EXT2_NDIR_BLOCKS; i++)