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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Current File : //usr/include/asm-generic/statfs.h
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#ifndef _GENERIC_STATFS_H
#define _GENERIC_STATFS_H

#include <linux/types.h>


/*
 * Most 64-bit platforms use 'long', while most 32-bit platforms use '__u32'.
 * Yes, they differ in signedness as well as size.
 * Special cases can override it for themselves -- except for S390x, which
 * is just a little too special for us. And MIPS, which I'm not touching
 * with a 10' pole.
 */
#ifndef __statfs_word
#if __BITS_PER_LONG == 64
#define __statfs_word __kernel_long_t
#else
#define __statfs_word __u32
#endif
#endif

struct statfs {
	__statfs_word f_type;
	__statfs_word f_bsize;
	__statfs_word f_blocks;
	__statfs_word f_bfree;
	__statfs_word f_bavail;
	__statfs_word f_files;
	__statfs_word f_ffree;
	__kernel_fsid_t f_fsid;
	__statfs_word f_namelen;
	__statfs_word f_frsize;
	__statfs_word f_flags;
	__statfs_word f_spare[4];
};

/*
 * ARM needs to avoid the 32-bit padding at the end, for consistency
 * between EABI and OABI 
 */
#ifndef ARCH_PACK_STATFS64
#define ARCH_PACK_STATFS64
#endif

struct statfs64 {
	__statfs_word f_type;
	__statfs_word f_bsize;
	__u64 f_blocks;
	__u64 f_bfree;
	__u64 f_bavail;
	__u64 f_files;
	__u64 f_ffree;
	__kernel_fsid_t f_fsid;
	__statfs_word f_namelen;
	__statfs_word f_frsize;
	__statfs_word f_flags;
	__statfs_word f_spare[4];
} ARCH_PACK_STATFS64;

/* 
 * IA64 and x86_64 need to avoid the 32-bit padding at the end,
 * to be compatible with the i386 ABI
 */
#ifndef ARCH_PACK_COMPAT_STATFS64
#define ARCH_PACK_COMPAT_STATFS64
#endif

struct compat_statfs64 {
	__u32 f_type;
	__u32 f_bsize;
	__u64 f_blocks;
	__u64 f_bfree;
	__u64 f_bavail;
	__u64 f_files;
	__u64 f_ffree;
	__kernel_fsid_t f_fsid;
	__u32 f_namelen;
	__u32 f_frsize;
	__u32 f_flags;
	__u32 f_spare[4];
} ARCH_PACK_COMPAT_STATFS64;

#endif /* _GENERIC_STATFS_H */

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