EXT2_DIR_REC_LEN
space = fs->e2fs_bsize - EXT2_DIR_REC_LEN(0);
entry_len = EXT2_DIR_REC_LEN(last_entry->e2d_namlen);
memcpy(last_entry, new_entry, EXT2_DIR_REC_LEN(new_entry->e2d_namlen));
entry_len = EXT2_DIR_REC_LEN(ep->e2d_namlen);
entry_len = EXT2_DIR_REC_LEN(ep->e2d_namlen);
dotdot->e2d_reclen = blksize - EXT2_DIR_REC_LEN(1);
uint32_t space = ip->i_e2fs->e2fs_bsize - EXT2_DIR_REC_LEN(1) -
EXT2_DIR_REC_LEN(2) - len;
size -= EXT2_DIR_REC_LEN(ep->e2d_namlen);
top = (void *)((char *)data + bsize - EXT2_DIR_REC_LEN(0));