晋太元中,武陵人捕鱼为业。缘溪行,忘路之远近。忽逢桃花林,夹岸数百步,中无杂树,芳草鲜美,落英缤纷。渔人甚异之,复前行,欲穷其林。 林尽水源,便得一山,山有小口,仿佛若有光。便舍船,从口入。初极狭,才通人。复行数十步,豁然开朗。土地平旷,屋舍俨然,有良田、美池、桑竹之属。阡陌交通,鸡犬相闻。其中往来种作,男女衣着,悉如外人。黄发垂髫,并怡然自乐。 见渔人,乃大惊,问所从来。具答之。便要还家,设酒杀鸡作食。村中闻有此人,咸来问讯。自云先世避秦时乱,率妻子邑人来此绝境,不复出焉,遂与外人间隔。问今是何世,乃不知有汉,无论魏晋。此人一一为具言所闻,皆叹惋。余人各复延至其家,皆出酒食。停数日,辞去。此中人语云:“不足为外人道也。”(间隔 一作:隔绝) 既出,得其船,便扶向路,处处志之。及郡下,诣太守,说如此。太守即遣人随其往,寻向所志,遂迷,不复得路。 南阳刘子骥,高尚士也,闻之,欣然规往。未果,寻病终。后遂无问津者。
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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
* include/linux/bfs_fs.h - BFS data structures on disk.
* Copyright (C) 1999 Tigran Aivazian <tigran@veritas.com>
*/
#ifndef _LINUX_BFS_FS_H
#define _LINUX_BFS_FS_H
#include <linux/types.h>
#define BFS_BSIZE_BITS 9
#define BFS_BSIZE (1<<BFS_BSIZE_BITS)
#define BFS_MAGIC 0x1BADFACE
#define BFS_ROOT_INO 2
#define BFS_INODES_PER_BLOCK 8
/* SVR4 vnode type values (bfs_inode->i_vtype) */
#define BFS_VDIR 2L
#define BFS_VREG 1L
/* BFS inode layout on disk */
struct bfs_inode {
__le16 i_ino;
__u16 i_unused;
__le32 i_sblock;
__le32 i_eblock;
__le32 i_eoffset;
__le32 i_vtype;
__le32 i_mode;
__le32 i_uid;
__le32 i_gid;
__le32 i_nlink;
__le32 i_atime;
__le32 i_mtime;
__le32 i_ctime;
__u32 i_padding[4];
};
#define BFS_NAMELEN 14
#define BFS_DIRENT_SIZE 16
#define BFS_DIRS_PER_BLOCK 32
struct bfs_dirent {
__le16 ino;
char name[BFS_NAMELEN];
};
/* BFS superblock layout on disk */
struct bfs_super_block {
__le32 s_magic;
__le32 s_start;
__le32 s_end;
__le32 s_from;
__le32 s_to;
__s32 s_bfrom;
__s32 s_bto;
char s_fsname[6];
char s_volume[6];
__u32 s_padding[118];
};
#define BFS_OFF2INO(offset) \
((((offset) - BFS_BSIZE) / sizeof(struct bfs_inode)) + BFS_ROOT_INO)
#define BFS_INO2OFF(ino) \
((__u32)(((ino) - BFS_ROOT_INO) * sizeof(struct bfs_inode)) + BFS_BSIZE)
#define BFS_NZFILESIZE(ip) \
((le32_to_cpu((ip)->i_eoffset) + 1) - le32_to_cpu((ip)->i_sblock) * BFS_BSIZE)
#define BFS_FILESIZE(ip) \
((ip)->i_sblock == 0 ? 0 : BFS_NZFILESIZE(ip))
#define BFS_FILEBLOCKS(ip) \
((ip)->i_sblock == 0 ? 0 : (le32_to_cpu((ip)->i_eblock) + 1) - le32_to_cpu((ip)->i_sblock))
#define BFS_UNCLEAN(bfs_sb, sb) \
((le32_to_cpu(bfs_sb->s_from) != -1) && (le32_to_cpu(bfs_sb->s_to) != -1) && !(sb->s_flags & SB_RDONLY))
#endif /* _LINUX_BFS_FS_H */