1 /* 2 * Copyright (c) International Business Machines Corp., 2000-2001 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License as published by 6 * the Free Software Foundation; either version 2 of the License, or 7 * (at your option) any later version. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See 12 * the GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write to the Free Software 16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 17 */ 18 #ifndef _H_JFS_DINODE 19 #define _H_JFS_DINODE 20 21 /* 22 * jfs_dinode.h: on-disk inode manager 23 */ 24 25 #define INODESLOTSIZE 128 26 #define L2INODESLOTSIZE 7 27 #define log2INODESIZE 9 /* log2(bytes per dinode) */ 28 29 30 /* 31 * on-disk inode : 512 bytes 32 * 33 * note: align 64-bit fields on 8-byte boundary. 34 */ 35 struct dinode { 36 /* 37 * I. base area (128 bytes) 38 * ------------------------ 39 * 40 * define generic/POSIX attributes 41 */ 42 u32 di_inostamp; /* 4: stamp to show inode belongs to fileset */ 43 s32 di_fileset; /* 4: fileset number */ 44 u32 di_number; /* 4: inode number, aka file serial number */ 45 u32 di_gen; /* 4: inode generation number */ 46 47 pxd_t di_ixpxd; /* 8: inode extent descriptor */ 48 49 s64 di_size; /* 8: size */ 50 s64 di_nblocks; /* 8: number of blocks allocated */ 51 52 u32 di_nlink; /* 4: number of links to the object */ 53 54 u32 di_uid; /* 4: user id of owner */ 55 u32 di_gid; /* 4: group id of owner */ 56 57 u32 di_mode; /* 4: attribute, format and permission */ 58 59 struct timestruc_t di_atime; /* 8: time last data accessed */ 60 struct timestruc_t di_ctime; /* 8: time last status changed */ 61 struct timestruc_t di_mtime; /* 8: time last data modified */ 62 struct timestruc_t di_otime; /* 8: time created */ 63 64 dxd_t di_acl; /* 16: acl descriptor */ 65 66 dxd_t di_ea; /* 16: ea descriptor */ 67 68 u32 di_next_index; /* 4: Next available dir_table index */ 69 70 s32 di_acltype; /* 4: Type of ACL */ 71 72 /* 73 * Extension Areas. 74 * 75 * Historically, the inode was partitioned into 4 128-byte areas, 76 * the last 3 being defined as unions which could have multiple 77 * uses. The first 96 bytes had been completely unused until 78 * an index table was added to the directory. It is now more 79 * useful to describe the last 3/4 of the inode as a single 80 * union. We would probably be better off redesigning the 81 * entire structure from scratch, but we don't want to break 82 * commonality with OS/2's JFS at this time. 83 */ 84 union { 85 struct { 86 /* 87 * This table contains the information needed to 88 * find a directory entry from a 32-bit index. 89 * If the index is small enough, the table is inline, 90 * otherwise, an x-tree root overlays this table 91 */ 92 struct dir_table_slot _table[12]; /* 96: inline */ 93 94 dtroot_t _dtroot; /* 288: dtree root */ 95 } _dir; /* (384) */ 96 #define di_dirtable u._dir._table 97 #define di_dtroot u._dir._dtroot 98 #define di_parent di_dtroot.header.idotdot 99 #define di_DASD di_dtroot.header.DASD 100 101 struct { 102 union { 103 u8 _data[96]; /* 96: unused */ 104 struct { 105 void *_imap; /* 4: unused */ 106 u32 _gengen; /* 4: generator */ 107 } _imap; 108 } _u1; /* 96: */ 109 #define di_gengen u._file._u1._imap._gengen 110 111 union { 112 xtpage_t _xtroot; 113 struct { 114 u8 unused[16]; /* 16: */ 115 dxd_t _dxd; /* 16: */ 116 union { 117 u32 _rdev; /* 4: */ 118 u8 _fastsymlink[128]; 119 } _u; 120 u8 _inlineea[128]; 121 } _special; 122 } _u2; 123 } _file; 124 #define di_xtroot u._file._u2._xtroot 125 #define di_dxd u._file._u2._special._dxd 126 #define di_btroot di_xtroot 127 #define di_inlinedata u._file._u2._special._u 128 #define di_rdev u._file._u2._special._u._rdev 129 #define di_fastsymlink u._file._u2._special._u._fastsymlink 130 #define di_inlineea u._file._u2._special._inlineea 131 } u; 132 }; 133 134 /* extended mode bits (on-disk inode di_mode) */ 135 #define IFJOURNAL 0x00010000 /* journalled file */ 136 #define ISPARSE 0x00020000 /* sparse file enabled */ 137 #define INLINEEA 0x00040000 /* inline EA area free */ 138 #define ISWAPFILE 0x00800000 /* file open for pager swap space */ 139 140 /* more extended mode bits: attributes for OS/2 */ 141 #define IREADONLY 0x02000000 /* no write access to file */ 142 #define IARCHIVE 0x40000000 /* file archive bit */ 143 #define ISYSTEM 0x08000000 /* system file */ 144 #define IHIDDEN 0x04000000 /* hidden file */ 145 #define IRASH 0x4E000000 /* mask for changeable attributes */ 146 #define INEWNAME 0x80000000 /* non-8.3 filename format */ 147 #define IDIRECTORY 0x20000000 /* directory (shadow of real bit) */ 148 #define ATTRSHIFT 25 /* bits to shift to move attribute 149 specification to mode position */ 150 151 #endif /*_H_JFS_DINODE */ 152