ext2_dinode.h revision 259904
1/*- 2 * Copyright (c) 2009 Aditya Sarawgi 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD: stable/10/sys/fs/ext2fs/ext2_dinode.h 259904 2013-12-26 01:12:35Z pfg $ 27 */ 28 29#ifndef _FS_EXT2FS_EXT2_DINODE_H_ 30#define _FS_EXT2FS_EXT2_DINODE_H_ 31 32/* 33 * Special inode numbers 34 * The root inode is the root of the file system. Inode 0 can't be used for 35 * normal purposes and bad blocks are normally linked to inode 1, thus 36 * the root inode is 2. 37 * Inode 3 to 10 are reserved in ext2fs. 38 */ 39#define EXT2_BADBLKINO ((ino_t)1) 40#define EXT2_ROOTINO ((ino_t)2) 41#define EXT2_ACLIDXINO ((ino_t)3) 42#define EXT2_ACLDATAINO ((ino_t)4) 43#define EXT2_BOOTLOADERINO ((ino_t)5) 44#define EXT2_UNDELDIRINO ((ino_t)6) 45#define EXT2_RESIZEINO ((ino_t)7) 46#define EXT2_JOURNALINO ((ino_t)8) 47#define EXT2_EXCLUDEINO ((ino_t)9) 48#define EXT2_REPLICAINO ((ino_t)10) 49#define EXT2_FIRSTINO ((ino_t)11) 50 51/* 52 * Inode flags 53 * The current implementation uses only EXT2_IMMUTABLE and EXT2_APPEND flags 54 */ 55#define EXT2_SECRM 0x00000001 /* Secure deletion */ 56#define EXT2_UNRM 0x00000002 /* Undelete */ 57#define EXT2_COMPR 0x00000004 /* Compress file */ 58#define EXT2_SYNC 0x00000008 /* Synchronous updates */ 59#define EXT2_IMMUTABLE 0x00000010 /* Immutable file */ 60#define EXT2_APPEND 0x00000020 /* writes to file may only append */ 61#define EXT2_NODUMP 0x00000040 /* do not dump file */ 62#define EXT2_NOATIME 0x00000080 /* do not update atime */ 63 64#define EXT4_INDEX 0x00001000 /* hash-indexed directory */ 65#define EXT4_IMAGIC 0x00002000 /* AFS directory */ 66#define EXT4_JOURNAL_DATA 0x00004000 /* file data should be journaled */ 67#define EXT4_NOTAIL 0x00008000 /* file tail should not be merged */ 68#define EXT4_DIRSYNC 0x00010000 /* dirsync behaviour */ 69#define EXT4_TOPDIR 0x00020000 /* Top of directory hierarchies*/ 70#define EXT4_HUGE_FILE 0x00040000 /* Set to each huge file */ 71#define EXT4_EXTENTS 0x00080000 /* Inode uses extents */ 72#define EXT4_EOFBLOCKS 0x00400000 /* Blocks allocated beyond EOF */ 73 74/* 75 * Definitions for nanosecond timestamps. 76 * Ext3 inode versioning, 2006-12-13. 77 */ 78#define EXT3_EPOCH_BITS 2 79#define EXT3_EPOCH_MASK ((1 << EXT3_EPOCH_BITS) - 1) 80#define EXT3_NSEC_MASK (~0UL << EXT3_EPOCH_BITS) 81 82#define E2DI_HAS_XTIME(ip) (EXT2_HAS_RO_COMPAT_FEATURE(ip->i_e2fs, \ 83 EXT2F_ROCOMPAT_EXTRA_ISIZE)) 84#define E2DI_HAS_HUGE_FILE(ip) (EXT2_HAS_RO_COMPAT_FEATURE(ip->i_e2fs, \ 85 EXT2F_ROCOMPAT_HUGE_FILE)) 86 87/* 88 * Constants relative to the data blocks 89 */ 90#define EXT2_NDIR_BLOCKS 12 91#define EXT2_IND_BLOCK EXT2_NDIR_BLOCKS 92#define EXT2_DIND_BLOCK (EXT2_IND_BLOCK + 1) 93#define EXT2_TIND_BLOCK (EXT2_DIND_BLOCK + 1) 94#define EXT2_N_BLOCKS (EXT2_TIND_BLOCK + 1) 95#define EXT2_MAXSYMLINKLEN (EXT2_N_BLOCKS * sizeof(uint32_t)) 96 97/* 98 * Structure of an inode on the disk 99 */ 100struct 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: Change 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: Low 32 bits inode version */ 113 uint32_t e2di_blocks[EXT2_N_BLOCKS]; /* 40: disk blocks */ 114 uint32_t e2di_gen; /* 100: generation number */ 115 uint32_t e2di_facl; /* 104: Low EA block */ 116 uint32_t e2di_size_high; /* 108: Upper bits of file size */ 117 uint32_t e2di_faddr; /* 112: Fragment address (obsolete) */ 118 uint16_t e2di_nblock_high; /* 116: Blocks count bits 47:32 */ 119 uint16_t e2di_facl_high; /* 118: File EA 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 uint16_t e2di_chksum_lo; /* 124: Lower inode checksum */ 123 uint16_t e2di_lx_reserved; /* 126: Unused */ 124 uint16_t e2di_extra_isize; /* 128: Size of this inode */ 125 uint16_t e2di_chksum_hi; /* 130: High inode checksum */ 126 uint32_t e2di_ctime_extra; /* 132: Extra change time */ 127 uint32_t e2di_mtime_extra; /* 136: Extra modification time */ 128 uint32_t e2di_atime_extra; /* 140: Extra access time */ 129 uint32_t e2di_crtime; /* 144: Creation (birth)time */ 130 uint32_t e2di_crtime_extra; /* 148: Extra creation (birth)time */ 131 uint32_t e2di_version_hi; /* 152: High bits of inode version */ 132}; 133 134#endif /* !_FS_EXT2FS_EXT2_DINODE_H_ */ 135 136