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 */ /* * linux/include/linux/nfs_fs.h * * Copyright (C) 1992 Rick Sladkey * * OS-specific nfs filesystem definitions and declarations */ #ifndef _LINUX_NFS_FS_H #define _LINUX_NFS_FS_H #include <linux/magic.h> /* Default timeout values */ #define NFS_DEF_UDP_TIMEO (11) #define NFS_DEF_UDP_RETRANS (3) #define NFS_DEF_TCP_TIMEO (600) #define NFS_DEF_TCP_RETRANS (2) #define NFS_MAX_UDP_TIMEOUT (60*HZ) #define NFS_MAX_TCP_TIMEOUT (600*HZ) #define NFS_DEF_ACREGMIN (3) #define NFS_DEF_ACREGMAX (60) #define NFS_DEF_ACDIRMIN (30) #define NFS_DEF_ACDIRMAX (60) /* * When flushing a cluster of dirty pages, there can be different * strategies: */ #define FLUSH_SYNC 1 /* file being synced, or contention */ #define FLUSH_STABLE 4 /* commit to stable storage */ #define FLUSH_LOWPRI 8 /* low priority background flush */ #define FLUSH_HIGHPRI 16 /* high priority memory reclaim flush */ #define FLUSH_COND_STABLE 32 /* conditional stable write - only stable * if everything fits in one RPC */ /* * NFS debug flags */ #define NFSDBG_VFS 0x0001 #define NFSDBG_DIRCACHE 0x0002 #define NFSDBG_LOOKUPCACHE 0x0004 #define NFSDBG_PAGECACHE 0x0008 #define NFSDBG_PROC 0x0010 #define NFSDBG_XDR 0x0020 #define NFSDBG_FILE 0x0040 #define NFSDBG_ROOT 0x0080 #define NFSDBG_CALLBACK 0x0100 #define NFSDBG_CLIENT 0x0200 #define NFSDBG_MOUNT 0x0400 #define NFSDBG_FSCACHE 0x0800 #define NFSDBG_PNFS 0x1000 #define NFSDBG_PNFS_LD 0x2000 #define NFSDBG_STATE 0x4000 #define NFSDBG_XATTRCACHE 0x8000 #define NFSDBG_ALL 0xFFFF #endif /* _LINUX_NFS_FS_H */