Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 | /* * Copyright (c) International Business Machines Corp., 2000-2001 * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See * the GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #ifndef _H_JFS_DINODE #define _H_JFS_DINODE /* * jfs_dinode.h: on-disk inode manager */ #define INODESLOTSIZE 128 #define L2INODESLOTSIZE 7 #define log2INODESIZE 9 /* log2(bytes per dinode) */ /* * 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 */ dtroot_t _dtroot; /* 288: dtree root */ } _dir; /* (384) */ #define di_dirtable u._dir._table #define di_dtroot u._dir._dtroot #define di_parent di_dtroot.header.idotdot #define di_DASD di_dtroot.header.DASD struct { union { u8 _data[96]; /* 96: unused */ struct { void *_imap; /* 4: unused */ __le32 _gengen; /* 4: generator */ } _imap; } _u1; /* 96: */ #define di_gengen u._file._u1._imap._gengen union { xtpage_t _xtroot; struct { u8 unused[16]; /* 16: */ dxd_t _dxd; /* 16: */ union { __le32 _rdev; /* 4: */ u8 _fastsymlink[128]; } _u; u8 _inlineea[128]; } _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 } 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 IARCHIVE 0x40000000 /* file archive bit */ #define ISYSTEM 0x08000000 /* system file */ #define IHIDDEN 0x04000000 /* hidden file */ #define IRASH 0x4E000000 /* mask for changeable attributes */ #define INEWNAME 0x80000000 /* non-8.3 filename format */ #define IDIRECTORY 0x20000000 /* directory (shadow of real bit) */ #define ATTRSHIFT 25 /* bits to shift to move attribute specification to mode position */ #endif /*_H_JFS_DINODE */ |