ext2_dinode.h revision 294653
1117395Skan/*- 2117395Skan * Copyright (c) 2009 Aditya Sarawgi 3117395Skan * All rights reserved. 4117395Skan * 5117395Skan * Redistribution and use in source and binary forms, with or without 6117395Skan * modification, are permitted provided that the following conditions 7117395Skan * are met: 8117395Skan * 1. Redistributions of source code must retain the above copyright 9117395Skan * notice, this list of conditions and the following disclaimer. 10117395Skan * 2. Redistributions in binary form must reproduce the above copyright 11117395Skan * notice, this list of conditions and the following disclaimer in the 12117395Skan * documentation and/or other materials provided with the distribution. 13117395Skan * 14117395Skan * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15117395Skan * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16117395Skan * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17117395Skan * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18117395Skan * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19117395Skan * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20117395Skan * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21117395Skan * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22117395Skan * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23117395Skan * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24117395Skan * SUCH DAMAGE. 25117395Skan * 26117395Skan * $FreeBSD: head/sys/fs/ext2fs/ext2_dinode.h 294653 2016-01-24 02:41:49Z pfg $ 27117395Skan */ 28117395Skan 29117395Skan#ifndef _FS_EXT2FS_EXT2_DINODE_H_ 30117395Skan#define _FS_EXT2FS_EXT2_DINODE_H_ 31117395Skan 32117395Skan/* 33117395Skan * Special inode numbers 34117395Skan * The root inode is the root of the file system. Inode 0 can't be used for 35117395Skan * normal purposes and bad blocks are normally linked to inode 1, thus 36117395Skan * the root inode is 2. 37117395Skan * Inode 3 to 10 are reserved in ext2fs. 38117395Skan */ 39117395Skan#define EXT2_BADBLKINO ((ino_t)1) 40117395Skan#define EXT2_ROOTINO ((ino_t)2) 41117395Skan#define EXT2_ACLIDXINO ((ino_t)3) 42117395Skan#define EXT2_ACLDATAINO ((ino_t)4) 43117395Skan#define EXT2_BOOTLOADERINO ((ino_t)5) 44117395Skan#define EXT2_UNDELDIRINO ((ino_t)6) 45117395Skan#define EXT2_RESIZEINO ((ino_t)7) 46117395Skan#define EXT2_JOURNALINO ((ino_t)8) 47117395Skan#define EXT2_EXCLUDEINO ((ino_t)9) 48117395Skan#define EXT2_REPLICAINO ((ino_t)10) 49117395Skan#define EXT2_FIRSTINO ((ino_t)11) 50117395Skan 51117395Skan/* 52117395Skan * Inode flags 53117395Skan * The system supports EXT2_IMMUTABLE, EXT2_APPEND and EXT2_NODUMP flags. 54117395Skan * The current implementation also uses EXT3_INDEX, EXT4_EXTENTS and 55117395Skan * EXT4_HUGE_FILE with some restrictions, imposed the lack of write 56117395Skan * support. 57117395Skan */ 58117395Skan#define EXT2_SECRM 0x00000001 /* Secure deletion */ 59117395Skan#define EXT2_UNRM 0x00000002 /* Undelete */ 60117395Skan#define EXT2_COMPR 0x00000004 /* Compress file */ 61117395Skan#define EXT2_SYNC 0x00000008 /* Synchronous updates */ 62117395Skan#define EXT2_IMMUTABLE 0x00000010 /* Immutable file */ 63117395Skan#define EXT2_APPEND 0x00000020 /* Writes to file may only append */ 64117395Skan#define EXT2_NODUMP 0x00000040 /* Do not dump file */ 65117395Skan#define EXT2_NOATIME 0x00000080 /* Do not update atime */ 66117395Skan#define EXT3_INDEX 0x00001000 /* Hash-indexed directory */ 67117395Skan#define EXT4_IMAGIC 0x00002000 /* AFS directory */ 68117395Skan#define EXT4_JOURNAL_DATA 0x00004000 /* File data should be journaled */ 69117395Skan#define EXT4_NOTAIL 0x00008000 /* File tail should not be merged */ 70117395Skan#define EXT4_DIRSYNC 0x00010000 /* Dirsync behaviour */ 71117395Skan#define EXT4_TOPDIR 0x00020000 /* Top of directory hierarchies*/ 72117395Skan#define EXT4_HUGE_FILE 0x00040000 /* Set to each huge file */ 73117395Skan#define EXT4_EXTENTS 0x00080000 /* Inode uses extents */ 74117395Skan#define EXT4_EOFBLOCKS 0x00400000 /* Blocks allocated beyond EOF */ 75117395Skan 76117395Skan/* 77117395Skan * Definitions for nanosecond timestamps. 78117395Skan * Ext3 inode versioning, 2006-12-13. 79117395Skan */ 80117395Skan#define EXT3_EPOCH_BITS 2 81117395Skan#define EXT3_EPOCH_MASK ((1 << EXT3_EPOCH_BITS) - 1) 82117395Skan#define EXT3_NSEC_MASK (~0UL << EXT3_EPOCH_BITS) 83117395Skan 84117395Skan#define E2DI_HAS_XTIME(ip) (EXT2_HAS_RO_COMPAT_FEATURE(ip->i_e2fs, \ 85117395Skan EXT2F_ROCOMPAT_EXTRA_ISIZE)) 86117395Skan#define E2DI_HAS_HUGE_FILE(ip) (EXT2_HAS_RO_COMPAT_FEATURE(ip->i_e2fs, \ 87117395Skan EXT2F_ROCOMPAT_HUGE_FILE)) 88117395Skan 89117395Skan/* 90117395Skan * Constants relative to the data blocks 91117395Skan */ 92117395Skan#define EXT2_NDIR_BLOCKS 12 93117395Skan#define EXT2_IND_BLOCK EXT2_NDIR_BLOCKS 94117395Skan#define EXT2_DIND_BLOCK (EXT2_IND_BLOCK + 1) 95117395Skan#define EXT2_TIND_BLOCK (EXT2_DIND_BLOCK + 1) 96117395Skan#define EXT2_N_BLOCKS (EXT2_TIND_BLOCK + 1) 97117395Skan#define EXT2_MAXSYMLINKLEN (EXT2_N_BLOCKS * sizeof(uint32_t)) 98117395Skan 99117395Skan/* 100117395Skan * Structure of an inode on the disk 101117395Skan */ 102117395Skanstruct ext2fs_dinode { 103117395Skan uint16_t e2di_mode; /* 0: IFMT, permissions; see below. */ 104117395Skan uint16_t e2di_uid; /* 2: Owner UID */ 105117395Skan uint32_t e2di_size; /* 4: Size (in bytes) */ 106117395Skan uint32_t e2di_atime; /* 8: Access time */ 107117395Skan uint32_t e2di_ctime; /* 12: Change time */ 108117395Skan uint32_t e2di_mtime; /* 16: Modification time */ 109117395Skan uint32_t e2di_dtime; /* 20: Deletion time */ 110117395Skan uint16_t e2di_gid; /* 24: Owner GID */ 111117395Skan uint16_t e2di_nlink; /* 26: File link count */ 112117395Skan uint32_t e2di_nblock; /* 28: Blocks count */ 113117395Skan uint32_t e2di_flags; /* 32: Status flags (chflags) */ 114117395Skan uint32_t e2di_version; /* 36: Low 32 bits inode version */ 115117395Skan uint32_t e2di_blocks[EXT2_N_BLOCKS]; /* 40: disk blocks */ 116117395Skan uint32_t e2di_gen; /* 100: generation number */ 117117395Skan uint32_t e2di_facl; /* 104: Low EA block */ 118117395Skan uint32_t e2di_size_high; /* 108: Upper bits of file size */ 119117395Skan uint32_t e2di_faddr; /* 112: Fragment address (obsolete) */ 120117395Skan uint16_t e2di_nblock_high; /* 116: Blocks count bits 47:32 */ 121117395Skan uint16_t e2di_facl_high; /* 118: File EA bits 47:32 */ 122117395Skan uint16_t e2di_uid_high; /* 120: Owner UID top 16 bits */ 123117395Skan uint16_t e2di_gid_high; /* 122: Owner GID top 16 bits */ 124117395Skan uint16_t e2di_chksum_lo; /* 124: Lower inode checksum */ 125117395Skan uint16_t e2di_lx_reserved; /* 126: Unused */ 126117395Skan uint16_t e2di_extra_isize; /* 128: Size of this inode */ 127117395Skan uint16_t e2di_chksum_hi; /* 130: High inode checksum */ 128117395Skan uint32_t e2di_ctime_extra; /* 132: Extra change time */ 129117395Skan uint32_t e2di_mtime_extra; /* 136: Extra modification time */ 130117395Skan uint32_t e2di_atime_extra; /* 140: Extra access time */ 131117395Skan uint32_t e2di_crtime; /* 144: Creation (birth)time */ 132117395Skan uint32_t e2di_crtime_extra; /* 148: Extra creation (birth)time */ 133117395Skan uint32_t e2di_version_hi; /* 152: High bits of inode version */ 134117395Skan}; 135117395Skan 136117395Skan#endif /* !_FS_EXT2FS_EXT2_DINODE_H_ */ 137117395Skan 138117395Skan