dirinode.py 文件源码

def mknod(self, parent, name, mode, mtime):
        assertion(self.is_dir(parent), "mknod: parent is not a directory")
        assertion(name[0] != 0, "mknod: name is null")

        self._inode.begin_tx()

        parent_block, parent_bid, off, valid = self.locate_empty_dentry_slot_err_ino(parent)
        if Not(valid):
            self._inode.commit_tx()
            return 0, errno.ENOSPC

        ino = self.ialloc()

        attr = Stat(size=0, mtime=mtime, mode=mode, nlink=2)

        self._inode.set_iattr(ino, attr)

        attr = self._inode.get_iattr(parent)
        assertion(ULE(attr.bsize, 522), "mknod: bsize is larger than 522")
        attr.size = Concat32(BitVecVal(522, 32), BitVecVal(4096 * 522, 32))
        assertion(ULT(attr.nlink, attr.nlink + 1), "mknod: nlink overflow")
        attr.nlink += 1

        self._inode.set_iattr(parent, attr)

        self.write_dentry(parent_block, off, ino, name)
        parent_block[off] = ino

        self._inode.write(parent_bid, parent_block)

        self._inode.commit_tx()

        return ino, 0