ext2fs_dinode.h revision 1.24
1 /* $NetBSD: ext2fs_dinode.h,v 1.24 2012/11/19 00:36:21 jakllsch Exp $ */ 2 3 /* 4 * Copyright (c) 1982, 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * (c) UNIX System Laboratories, Inc. 7 * All or some portions of this file are derived from material licensed 8 * to the University of California by American Telephone and Telegraph 9 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 10 * the permission of UNIX System Laboratories, Inc. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)dinode.h 8.6 (Berkeley) 9/13/94 37 * Modified for ext2fs by Manuel Bouyer. 38 */ 39 40 /* 41 * Copyright (c) 1997 Manuel Bouyer. 42 * 43 * Redistribution and use in source and binary forms, with or without 44 * modification, are permitted provided that the following conditions 45 * are met: 46 * 1. Redistributions of source code must retain the above copyright 47 * notice, this list of conditions and the following disclaimer. 48 * 2. Redistributions in binary form must reproduce the above copyright 49 * notice, this list of conditions and the following disclaimer in the 50 * documentation and/or other materials provided with the distribution. 51 * 52 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 53 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 54 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 55 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 56 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 57 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 58 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 59 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 60 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 61 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 62 * 63 * @(#)dinode.h 8.6 (Berkeley) 9/13/94 64 * Modified for ext2fs by Manuel Bouyer. 65 */ 66 67 #ifndef _UFS_EXT2FS_EXT2FS_DINODE_H_ 68 #define _UFS_EXT2FS_EXT2FS_DINODE_H_ 69 70 #include <sys/stat.h> 71 72 /* 73 * The root inode is the root of the file system. Inode 0 can't be used for 74 * normal purposes and bad blocks are normally linked to inode 1, thus 75 * the root inode is 2. 76 * Inode 3 to 10 are reserved in ext2fs. 77 */ 78 #define EXT2_BADBLKINO ((ino_t)1) 79 #define EXT2_ROOTINO ((ino_t)2) 80 #define EXT2_ACLIDXINO ((ino_t)3) 81 #define EXT2_ACLDATAINO ((ino_t)4) 82 #define EXT2_BOOTLOADERINO ((ino_t)5) 83 #define EXT2_UNDELDIRINO ((ino_t)6) 84 #define EXT2_RESIZEINO ((ino_t)7) 85 #define EXT2_JOURNALINO ((ino_t)8) 86 #define EXT2_FIRSTINO ((ino_t)11) 87 88 /* 89 * A dinode contains all the meta-data associated with a UFS file. 90 * This structure defines the on-disk format of a dinode. Since 91 * this structure describes an on-disk structure, all its fields 92 * are defined by types with precise widths. 93 */ 94 95 #define NDADDR 12 /* Direct addresses in inode. */ 96 #define NIADDR 3 /* Indirect addresses in inode. */ 97 98 #define EXT2_MAXSYMLINKLEN ((NDADDR+NIADDR) * sizeof (uint32_t)) 99 100 struct ext2fs_dinode { 101 uint16_t e2di_mode; /* 0: IFMT, permissions; see below. */ 102 uint16_t e2di_uid; /* 2: Owner UID */ 103 uint32_t e2di_size; /* 4: Size (in bytes) */ 104 uint32_t e2di_atime; /* 8: Access time */ 105 uint32_t e2di_ctime; /* 12: Create time */ 106 uint32_t e2di_mtime; /* 16: Modification time */ 107 uint32_t e2di_dtime; /* 20: Deletion time */ 108 uint16_t e2di_gid; /* 24: Owner GID */ 109 uint16_t e2di_nlink; /* 26: File link count */ 110 uint32_t e2di_nblock; /* 28: Blocks count */ 111 uint32_t e2di_flags; /* 32: Status flags (chflags) */ 112 uint32_t e2di_version; /* 36: was reserved1 */ 113 uint32_t e2di_blocks[NDADDR+NIADDR]; /* 40: disk blocks */ 114 uint32_t e2di_gen; /* 100: generation number */ 115 uint32_t e2di_facl; /* 104: file ACL (not implemented) */ 116 uint32_t e2di_dacl; /* 108: dir ACL (not implemented) */ 117 uint32_t e2di_faddr; /* 112: fragment address */ 118 uint16_t e2di_nblock_high; /* 116: Blocks count bits 47:32 */ 119 uint16_t e2di_facl_high; /* 118: file ACL bits 47:32 */ 120 uint16_t e2di_uid_high; /* 120: Owner UID top 16 bits */ 121 uint16_t e2di_gid_high; /* 122: Owner GID top 16 bits */ 122 uint32_t e2di_linux_reserved3; /* 124 */ 123 }; 124 125 126 127 #define E2MAXSYMLINKLEN ((NDADDR + NIADDR) * sizeof(uint32_t)) 128 129 /* File permissions. */ 130 #define EXT2_IEXEC 0000100 /* Executable. */ 131 #define EXT2_IWRITE 0000200 /* Writable. */ 132 #define EXT2_IREAD 0000400 /* Readable. */ 133 #define EXT2_ISVTX 0001000 /* Sticky bit. */ 134 #define EXT2_ISGID 0002000 /* Set-gid. */ 135 #define EXT2_ISUID 0004000 /* Set-uid. */ 136 137 /* File types. */ 138 #define EXT2_IFMT 0170000 /* Mask of file type. */ 139 #define EXT2_IFIFO 0010000 /* Named pipe (fifo). */ 140 #define EXT2_IFCHR 0020000 /* Character device. */ 141 #define EXT2_IFDIR 0040000 /* Directory file. */ 142 #define EXT2_IFBLK 0060000 /* Block device. */ 143 #define EXT2_IFREG 0100000 /* Regular file. */ 144 #define EXT2_IFLNK 0120000 /* Symbolic link. */ 145 #define EXT2_IFSOCK 0140000 /* UNIX domain socket. */ 146 147 /* file flags */ 148 #define EXT2_SECRM 0x00000001 /* Secure deletion */ 149 #define EXT2_UNRM 0x00000002 /* Undelete */ 150 #define EXT2_COMPR 0x00000004 /* Compress file */ 151 #define EXT2_SYNC 0x00000008 /* Synchronous updates */ 152 #define EXT2_IMMUTABLE 0x00000010 /* Immutable file */ 153 #define EXT2_APPEND 0x00000020 /* writes to file may only append */ 154 #define EXT2_NODUMP 0x00000040 /* do not dump file */ 155 156 /* Size of on-disk inode. */ 157 #define EXT2_REV0_DINODE_SIZE sizeof(struct ext2fs_dinode) 158 #define EXT2_DINODE_SIZE(fs) ((fs)->e2fs.e2fs_rev > E2FS_REV0 ? \ 159 (fs)->e2fs.e2fs_inode_size : \ 160 EXT2_REV0_DINODE_SIZE) 161 162 /* 163 * The e2di_blocks fields may be overlaid with other information for 164 * file types that do not have associated disk storage. Block 165 * and character devices overlay the first data block with their 166 * dev_t value. Short symbolic links place their path in the 167 * di_db area. 168 */ 169 170 #define e2di_rdev e2di_blocks[0] 171 #define e2di_shortlink e2di_blocks 172 173 /* e2fs needs byte swapping on big-endian systems */ 174 #if BYTE_ORDER == LITTLE_ENDIAN 175 # define e2fs_iload(old, new) \ 176 memcpy((new),(old),sizeof(struct ext2fs_dinode)) 177 # define e2fs_isave(old, new) \ 178 memcpy((new),(old),sizeof(struct ext2fs_dinode)) 179 #else 180 void e2fs_i_bswap(struct ext2fs_dinode *, struct ext2fs_dinode *); 181 # define e2fs_iload(old, new) e2fs_i_bswap((old), (new)) 182 # define e2fs_isave(old, new) e2fs_i_bswap((old), (new)) 183 #endif 184 185 #endif /* !_UFS_EXT2FS_EXT2FS_DINODE_H_ */ 186
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