1. 根目录:
2. include
3. uapi
4. asm-generic
5. stat.h

#ifndef __ASM_GENERIC_STAT_H
#define __ASM_GENERIC_STAT_H

/*
 * Everybody gets this wrong and has to stick with it for all
 * eternity. Hopefully, this version gets used by new architectures
 * so they don't fall into the same traps.
 *
 * stat64 is copied from powerpc64, with explicit padding added.
 * stat is the same structure layout on 64-bit, without the 'long long'
 * types.
 *
 * By convention, 64 bit architectures use the stat interface, while
 * 32 bit architectures use the stat64 interface. Note that we don't
 * provide an __old_kernel_stat here, which new architecture should
 * not have to start with.
 */

#include <asm/bitsperlong.h>

#define STAT_HAVE_NSEC 1

struct stat {
	unsigned long	st_dev;		/* Device.  */
	unsigned long	st_ino;		/* File serial number.  */
	unsigned int	st_mode;	/* File mode.  */
	unsigned int	st_nlink;	/* Link count.  */
	unsigned int	st_uid;		/* User ID of the file's owner.  */
	unsigned int	st_gid;		/* Group ID of the file's group. */
	unsigned long	st_rdev;	/* Device number, if device.  */
	unsigned long	__pad1;
	long		st_size;	/* Size of file, in bytes.  */
	int		st_blksize;	/* Optimal block size for I/O.  */
	int		__pad2;
	long		st_blocks;	/* Number 512-byte blocks allocated. */
	long		st_atime;	/* Time of last access.  */
	unsigned long	st_atime_nsec;
	long		st_mtime;	/* Time of last modification.  */
	unsigned long	st_mtime_nsec;
	long		st_ctime;	/* Time of last status change.  */
	unsigned long	st_ctime_nsec;
	unsigned int	__unused4;
	unsigned int	__unused5;
};

/* This matches struct stat64 in glibc2.1. Only used for 32 bit. */
#if __BITS_PER_LONG != 64 || defined(__ARCH_WANT_STAT64)
struct stat64 {
	unsigned long long st_dev;	/* Device.  */
	unsigned long long st_ino;	/* File serial number.  */
	unsigned int	st_mode;	/* File mode.  */
	unsigned int	st_nlink;	/* Link count.  */
	unsigned int	st_uid;		/* User ID of the file's owner.  */
	unsigned int	st_gid;		/* Group ID of the file's group. */
	unsigned long long st_rdev;	/* Device number, if device.  */
	unsigned long long __pad1;
	long long	st_size;	/* Size of file, in bytes.  */
	int		st_blksize;	/* Optimal block size for I/O.  */
	int		__pad2;
	long long	st_blocks;	/* Number 512-byte blocks allocated. */
	int		st_atime;	/* Time of last access.  */
	unsigned int	st_atime_nsec;
	int		st_mtime;	/* Time of last modification.  */
	unsigned int	st_mtime_nsec;
	int		st_ctime;	/* Time of last status change.  */
	unsigned int	st_ctime_nsec;
	unsigned int	__unused4;
	unsigned int	__unused5;
};
#endif

#endif /* __ASM_GENERIC_STAT_H */