Describes a file system file or directory entry as it is listed on a disk.
#include <sys/types.h> #include <sys/ino.h>
The inode file for an ordinary file or directory in a file system has the following structure defined by the sys/ino.h file format:
struct dinode
{
/* generation number */
ulong di_gen;
/* mode_t returned by stat () */
/* format,attributes and permission bits */
mode_t di_mode;
/* number of links to file(if 0,inode is available) */
ushort di_nlink;
/* accounting ID */
ushort di_acct;
/* user id of owner */
uid_t di_uid;
/* group id of owner */
gid_t di_gid;
/* size of file */
off_t di_size;
/* number of blocks actually used by file */
ulong di_nblocks;
/* time last modified */
struct timestruc_t di_mtime_ts;
/* time last accessed */
struct timestruc_t di_atime_ts;
/* time last changed inode */
struct timestruc_t di_ctime_ts;
/*defines for old time_t names */
#define di_mtime di_mtime_ts.tv_sec
#define di_atime di_atime_ts.tv_sec
#define di_ctime di_ctime_ts.tv_sec
/* extended access control information */
long di_acl; /* acl pointer */
#define ACL_INCORE (1<<31)
ulong di_sec; /* reserved */
/* spares */
ulong di_rsrvd[5];
/***** file type-dependent information ****/
/* size of private data in disk inode is D_PRIVATE.
* location and size of fields depend on object type.
*/
# define D_PRIVATE 48
union di_info
{
/* all types must fit within d_private */
char d_private[D_PRIVATE];
/* jfs regular file or directory. */
struct regdir
{
/*privilege vector-only for non-directory */
struct
{
ulong_di_offset;
ulong_di_flags;
define;PCL_ENABLED(1<<31)
define PCL_EXTENDED(1<<30)
define PCL_FLAGS\
(PCL_ENABLED|PCL_EXTENDED)
}_di_privingo;
priv_t_di_priv;
/* ACL templates - only for directory */
struct
{
ulong_di_aclf;
ulong_di_acld;
{_di_aclingo;
} _di_sec;
} _di_file;
/* offsets of regular file or directory private data. */
# define di_rdaddr _di_info._di_file._di_rdaddr
define di_vindirect _di_info._di_file._di_vinderect
define di_rinderect _di_info._di_file._di_rinderect
define di_privinfo _di_info._di_file._di_sec._di_privinfo
define di_privoffset _di_privinfo._di_privoffset
define di_privflags _di_privinfo._di_privflags
define di_priv _di_info._di_file._di_sec._di_priv
define di_aclf _di_info._di_file._di_sec._di_aclinfo._di_aclf
define di_acld _di_info._di_file._di_sec._di_aclinfo._di_acld
/*special file (device) /*
struct
}
dev_t_di_rdev;
}_di_dev;
/* offsets of special file private data. */
# define di_rdev _di_infor._di_dev._di_rdev
# define di_bnlastr _di_info._di_dev._di_bnlastr
# define di_dgp _di_info._di_dev._di_dgp
# define di_pino _di_info._di_dev._di_pino
/*
* symbolic link.link is stored inode if its
* length is less than D_PRIVATE. Otherwise like
* regular file.
*/
union
{
char _s_private[D_PRIVATE];
struct regdir_s_symfile;
}_di_sym;
/* offset of symbolic link private data */
# define di_symlink _di_info._di_sym._s_private
/*
*data for mounted filesystem. kept in inode = 0
*and dev = devt of mounted filesystem in inode table.
*/
struct mountnode
{
struct inode *_iplog; /*itab of log*/
struct inode *_ipinode; /*itab of .inodes*/
struct inode *_ipind; /*itab of .indirect*/
struct inode *_ipinomap; /*itab of inode map*/
struct inode *_ipdmap; /*itab of disk map*/
struct inode *_ipsuper; /*itab of super blk*/
struct inode *_ipinodex; /*itab of .inodex*/
struct jfsmount *_jfsmnt; /* ptr to mount data*/
ushort _fperpage; /* frag per block */
ushort _agsize; /* frags per ag */
ushort _iagsize; /* inodes per ag */
}_mt_info;
/*
* data for mounted filesystem. kept in inode = 0
* and dev = devt of mounted filesystem in inode table.
*/
struct mountnode
{
struct inode *_iplog; /*itab of log*/
struct inode *_ipinode; /*itab of .inodes*/
struct inode *_ipind; /*itab of .indirect*/
struct inode *_ipinomap; /*itab of inode map*/
struct inode *_ipdmap; /*itab of disk map*/
struct inode *_ipsuper; /*itab of super blk*/
struct inode *_ipinodex; /*itab of .inodex*/
struct jfsmount *_jfsmnt; /* ptr to mount data*/
ushort _fperpage; /* frag per block */
ushort _agsize; /* frags per ag */
ushort _iagsize; /* inodes per ag */
ushort _compress /* > 0 if data comp */
}_mt_info;
/* offsets of MOUNT data */
# define di_iplog _di_info._mt_info._iplog
# define di_ipinode _di_info._mt_info._ipinode
# define di_ipind _di_info._mt_info._ipind
# define di_ipinomap _di_info._mt_info._ipinomap
# define di_ipdmap _di_info._mt_info._ipdmap
# define di_ipsuper _di_info._mt_info._ipsuper
# define di_ipinodex _di_info._mt_info._ipinodex
# define di_jfsmnt _di_info._mt_info._jfsmnt
# define di_fperpage _di_info._mt_info._fperpage
# define di_agsize _di_info._mt_info._agsize
# define di_iagsize _di_info._mt_info._iagsize
/*
* log info. kept in inode = 0 and dev = devt of
* log device filesystem in inode table.
*/
struct lognode
{
int _logptr /* page number end of log */
int _logsize /* log size in pages */
int _logend /* eor in page _logptr */
int _logsync /* addr in last syncpt record */
int _nextsync /* bytes to next logsyncpt */
struct gnode * _logdgp; /* pointer to device gnode */
}_di_log;
/* offsets of MOUNT data */
# define di_iplog _di_info._mt_info._iplog
# define di_ipinode _di_info._mt_info._ipinode
# define di_ipind _di_info._mt_info._ipind
# define di_ipinomap _di_info._mt_info._ipinomap
# define di_ipdmap _di_info._mt_info._ipdmap
# define di_ipsuper _di_info._mt_info._ipsuper
# define di_ipinodex _di_info._mt_info._ipinodex
# define di_jfsmnt _di_info._mt_info._jfsmnt
# define di_fperpage _di_info._mt_info._fperpage
# define di_agsize _di_info._mt_info._agsize
# define di_iagsize _di_info._mt_info._iagsize
# define di_compress _di_info._mt_info._compress
/*
* log info. kept in inode = 0 and dev = devt of
* log device filesystem in inode table.
*/
struct lognode
{
int _logptr /* page number end of log */
int _logsize /* log size in pages */
int _logend /* eor in page _logptr */
int _logsync /* addr in last syncpt record */
int _nextsync /* bytes to next logsyncpt */
struct gnode * _logdgp; /* pointer to device gnode */
}_di_log;
/* offsets of LOG data */
# define di_logptr _di_info._di_log._logptr
# define di_logsize _di_info._di_log._logsize
# define di_logend _di_info._di_log._logend
# define di_logsync _di_info._di_log._logsync
# define di_nextsync _di_info._di_log._nextsync
# define di_logdgp _di_info._di_log._logdgp
}_di_info;
};
The filsys.h file, stat.h file, types.h file.
Directory Overview and File Systems Overview for System Management in AIX 5L Version 5.2 System Management Concepts: Operating System and Devices.