/* * on-disk inode : 512 bytes * * note: align 64-bit fields on 8-byte boundary.
*/ struct dinode { /* * I. base area (128 bytes) * ------------------------ * * define generic/POSIX attributes
*/
__le32 di_inostamp; /* 4: stamp to show inode belongs to fileset */
__le32 di_fileset; /* 4: fileset number */
__le32 di_number; /* 4: inode number, aka file serial number */
__le32 di_gen; /* 4: inode generation number */
pxd_t di_ixpxd; /* 8: inode extent descriptor */
__le64 di_size; /* 8: size */
__le64 di_nblocks; /* 8: number of blocks allocated */
__le32 di_nlink; /* 4: number of links to the object */
__le32 di_uid; /* 4: user id of owner */
__le32 di_gid; /* 4: group id of owner */
__le32 di_mode; /* 4: attribute, format and permission */
struct timestruc_t di_atime; /* 8: time last data accessed */ struct timestruc_t di_ctime; /* 8: time last status changed */ struct timestruc_t di_mtime; /* 8: time last data modified */ struct timestruc_t di_otime; /* 8: time created */
dxd_t di_acl; /* 16: acl descriptor */
dxd_t di_ea; /* 16: ea descriptor */
__le32 di_next_index; /* 4: Next available dir_table index */
__le32 di_acltype; /* 4: Type of ACL */
/* * Extension Areas. * * Historically, the inode was partitioned into 4 128-byte areas, * the last 3 being defined as unions which could have multiple * uses. The first 96 bytes had been completely unused until * an index table was added to the directory. It is now more * useful to describe the last 3/4 of the inode as a single * union. We would probably be better off redesigning the * entire structure from scratch, but we don't want to break * commonality with OS/2's JFS at this time.
*/ union { struct { /* * This table contains the information needed to * find a directory entry from a 32-bit index. * If the index is small enough, the table is inline, * otherwise, an x-tree root overlays this table
*/ struct dir_table_slot _table[12]; /* 96: inline */
union {
xtroot_t _xtroot; struct {
u8 unused[16]; /* 16: */
dxd_t _dxd; /* 16: */ union { /* * The fast symlink area * is expected to overflow * into _inlineea when * needed (which will clear * INLINEEA).
*/ struct { union {
__le32 _rdev; /* 4: */
u8 _fastsymlink[128];
} _u;
u8 _inlineea[128];
};
u8 _inline_all[256];
};
} _special;
} _u2;
} _file; #define di_xtroot u._file._u2._xtroot #define di_dxd u._file._u2._special._dxd #define di_btroot di_xtroot #define di_inlinedata u._file._u2._special._u #define di_rdev u._file._u2._special._u._rdev #define di_fastsymlink u._file._u2._special._u._fastsymlink #define di_inlineea u._file._u2._special._inlineea #define di_inline_all u._file._u2._special._inline_all
} u;
};
/* extended mode bits (on-disk inode di_mode) */ #define IFJOURNAL 0x00010000 /* journalled file */ #define ISPARSE 0x00020000 /* sparse file enabled */ #define INLINEEA 0x00040000 /* inline EA area free */ #define ISWAPFILE 0x00800000 /* file open for pager swap space */
/* more extended mode bits: attributes for OS/2 */ #define IREADONLY 0x02000000 /* no write access to file */ #define IHIDDEN 0x04000000 /* hidden file */ #define ISYSTEM 0x08000000 /* system file */
#define IDIRECTORY 0x20000000 /* directory (shadow of real bit) */ #define IARCHIVE 0x40000000 /* file archive bit */ #define INEWNAME 0x80000000 /* non-8.3 filename format */
#define IRASH 0x4E000000 /* mask for changeable attributes */ #define ATTRSHIFT 25 /* bits to shift to move attribute
specification to mode position */
/* extended attributes for Linux */
#define JFS_NOATIME_FL 0x00080000 /* do not update atime */
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