1 /* $OpenBSD: ext2fs_dinode.h,v 1.11 2008/11/23 23:52:35 tedu Exp $ */ 2 /* $NetBSD: ext2fs_dinode.h,v 1.6 2000/01/26 16:21:33 bouyer Exp $ */ 3 4 /* 5 * Copyright (c) 1997 Manuel Bouyer. 6 * Copyright (c) 1982, 1989, 1993 7 * The Regents of the University of California. All rights reserved. 8 * (c) UNIX System Laboratories, Inc. 9 * All or some portions of this file are derived from material licensed 10 * to the University of California by American Telephone and Telegraph 11 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 12 * the permission of UNIX System Laboratories, Inc. 13 * 14 * Redistribution and use in source and binary forms, with or without 15 * modification, are permitted provided that the following conditions 16 * are met: 17 * 1. Redistributions of source code must retain the above copyright 18 * notice, this list of conditions and the following disclaimer. 19 * 2. Redistributions in binary form must reproduce the above copyright 20 * notice, this list of conditions and the following disclaimer in the 21 * documentation and/or other materials provided with the distribution. 22 * 3. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)dinode.h 8.6 (Berkeley) 9/13/94 39 * Modified for ext2fs by Manuel Bouyer. 40 */ 41 42 #include <sys/stat.h> 43 44 /* 45 * The root inode is the root of the file system. Inode 0 can't be used for 46 * normal purposes and bad blocks are normally linked to inode 1, thus 47 * the root inode is 2. 48 * Inode 3 to 10 are reserved in ext2fs. 49 */ 50 #define EXT2_ROOTINO ((ino_t)2) 51 #define EXT2_FIRSTINO ((ino_t)11) 52 53 /* 54 * A dinode contains all the meta-data associated with a UFS file. 55 * This structure defines the on-disk format of a dinode. Since 56 * this structure describes an on-disk structure, all its fields 57 * are defined by types with precise widths. 58 */ 59 60 #define NDADDR 12 /* Direct addresses in inode. */ 61 #define NIADDR 3 /* Indirect addresses in inode. */ 62 63 #define EXT2_MAXSYMLINKLEN ((NDADDR+NIADDR) * sizeof (u_int32_t)) 64 65 struct ext2fs_dinode { 66 u_int16_t e2di_mode; /* 0: IFMT, permissions; see below. */ 67 u_int16_t e2di_uid_low; /* 2: Owner UID, lowest bits */ 68 u_int32_t e2di_size; /* 4: Size (in bytes) */ 69 u_int32_t e2di_atime; /* 8: Access time */ 70 u_int32_t e2di_ctime; /* 12: Create time */ 71 u_int32_t e2di_mtime; /* 16: Modification time */ 72 u_int32_t e2di_dtime; /* 20: Deletion time */ 73 u_int16_t e2di_gid_low; /* 24: Owner GID, lowest bits */ 74 u_int16_t e2di_nlink; /* 26: File link count */ 75 u_int32_t e2di_nblock; /* 28: Blocks count */ 76 u_int32_t e2di_flags; /* 32: Status flags (chflags) */ 77 u_int32_t e2di_linux_reserved1; /* 36 */ 78 u_int32_t e2di_blocks[NDADDR+NIADDR]; /* 40: disk blocks */ 79 u_int32_t e2di_gen; /* 100: generation number */ 80 u_int32_t e2di_facl; /* 104: file ACL (not implemented) */ 81 u_int32_t e2di_dacl; /* 108: dir ACL (not implemented) */ 82 u_int32_t e2di_faddr; /* 112: fragment address */ 83 u_int8_t e2di_nfrag; /* 116: fragment number */ 84 u_int8_t e2di_fsize; /* 117: fragment size */ 85 u_int16_t e2di_linux_reserved2; /* 118 */ 86 u_int16_t e2di_uid_high; /* 120: 16 highest bits of uid */ 87 u_int16_t e2di_gid_high; /* 122: 16 highest bits of gid */ 88 u_int32_t e2di_linux_reserved3; /* 124 */ 89 }; 90 91 #define E2MAXSYMLINKLEN ((NDADDR + NIADDR) * sizeof(u_int32_t)) 92 93 /* File permissions. */ 94 #define EXT2_IEXEC 0000100 /* Executable. */ 95 #define EXT2_IWRITE 0000200 /* Writeable. */ 96 #define EXT2_IREAD 0000400 /* Readable. */ 97 #define EXT2_ISVTX 0001000 /* Sticky bit. */ 98 #define EXT2_ISGID 0002000 /* Set-gid. */ 99 #define EXT2_ISUID 0004000 /* Set-uid. */ 100 101 /* File types. */ 102 #define EXT2_IFMT 0170000 /* Mask of file type. */ 103 #define EXT2_IFIFO 0010000 /* Named pipe (fifo). */ 104 #define EXT2_IFCHR 0020000 /* Character device. */ 105 #define EXT2_IFDIR 0040000 /* Directory file. */ 106 #define EXT2_IFBLK 0060000 /* Block device. */ 107 #define EXT2_IFREG 0100000 /* Regular file. */ 108 #define EXT2_IFLNK 0120000 /* Symbolic link. */ 109 #define EXT2_IFSOCK 0140000 /* UNIX domain socket. */ 110 111 /* file flags */ 112 #define EXT2_SECRM 0x00000001 /* Secure deletion */ 113 #define EXT2_UNRM 0x00000002 /* Undelete */ 114 #define EXT2_COMPR 0x00000004 /* Compress file */ 115 #define EXT2_SYNC 0x00000008 /* Synchronous updates */ 116 #define EXT2_IMMUTABLE 0x00000010 /* Immutable file */ 117 #define EXT2_APPEND 0x00000020 /* writes to file may only append */ 118 #define EXT2_NODUMP 0x00000040 /* do not dump file */ 119 120 /* Size of on-disk inode. */ 121 #define EXT2_DINODE_SIZE(s) (s)->e2fs.e2fs_inode_size 122 123 /* 124 * The e2di_blocks fields may be overlaid with other information for 125 * file types that do not have associated disk storage. Block 126 * and character devices overlay the first data block with their 127 * dev_t value. Short symbolic links place their path in the 128 * di_db area. 129 */ 130 131 #define e2di_rdev e2di_blocks[0] 132 #define e2di_shortlink e2di_blocks 133 134 /* e2fs needs byte swapping on big-endian systems */ 135 #if BYTE_ORDER == LITTLE_ENDIAN 136 # define e2fs_iload(old, new) memcpy((new),(old),sizeof(struct ext2fs_dinode)) 137 # define e2fs_isave(old, new) memcpy((new),(old),sizeof(struct ext2fs_dinode)) 138 #else 139 void e2fs_i_bswap(struct ext2fs_dinode *, struct ext2fs_dinode *); 140 # define e2fs_iload(old, new) e2fs_i_bswap((old), (new)) 141 # define e2fs_isave(old, new) e2fs_i_bswap((old), (new)) 142 #endif 143