1202283Slulf/*- 2202283Slulf * Copyright (c) 2009 Aditya Sarawgi 3202283Slulf * All rights reserved. 4202283Slulf * 5202283Slulf * Redistribution and use in source and binary forms, with or without 6202283Slulf * modification, are permitted provided that the following conditions 7202283Slulf * are met: 8202283Slulf * 1. Redistributions of source code must retain the above copyright 9202283Slulf * notice, this list of conditions and the following disclaimer. 10202283Slulf * 2. Redistributions in binary form must reproduce the above copyright 11202283Slulf * notice, this list of conditions and the following disclaimer in the 12202283Slulf * documentation and/or other materials provided with the distribution. 13202283Slulf * 14202283Slulf * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15202283Slulf * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16202283Slulf * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17202283Slulf * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18202283Slulf * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19202283Slulf * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20202283Slulf * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21202283Slulf * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22202283Slulf * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23202283Slulf * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24202283Slulf * SUCH DAMAGE. 25202283Slulf * 26202283Slulf * $FreeBSD$ 27202283Slulf */ 28202283Slulf 29202283Slulf#ifndef _FS_EXT2FS_EXT2_DINODE_H_ 30262724Spfg#define _FS_EXT2FS_EXT2_DINODE_H_ 31202283Slulf 32202283Slulf/* 33217703Sjhb * Special inode numbers 34217703Sjhb * The root inode is the root of the file system. Inode 0 can't be used for 35217703Sjhb * normal purposes and bad blocks are normally linked to inode 1, thus 36217703Sjhb * the root inode is 2. 37217703Sjhb * Inode 3 to 10 are reserved in ext2fs. 38217703Sjhb */ 39217703Sjhb#define EXT2_BADBLKINO ((ino_t)1) 40217703Sjhb#define EXT2_ROOTINO ((ino_t)2) 41217703Sjhb#define EXT2_ACLIDXINO ((ino_t)3) 42217703Sjhb#define EXT2_ACLDATAINO ((ino_t)4) 43217703Sjhb#define EXT2_BOOTLOADERINO ((ino_t)5) 44217703Sjhb#define EXT2_UNDELDIRINO ((ino_t)6) 45217703Sjhb#define EXT2_RESIZEINO ((ino_t)7) 46217703Sjhb#define EXT2_JOURNALINO ((ino_t)8) 47259903Spfg#define EXT2_EXCLUDEINO ((ino_t)9) 48259903Spfg#define EXT2_REPLICAINO ((ino_t)10) 49217703Sjhb#define EXT2_FIRSTINO ((ino_t)11) 50217703Sjhb 51217703Sjhb/* 52202283Slulf * Inode flags 53261312Spfg * The system supports EXT2_IMMUTABLE, EXT2_APPEND and EXT2_NODUMP flags. 54261312Spfg * The current implementation also uses EXT4_INDEX, EXT4_EXTENTS and 55261312Spfg * EXT4_HUGE_FILE with some restrictions, imposed the lack of write 56261312Spfg * support. 57202283Slulf */ 58262724Spfg#define EXT2_SECRM 0x00000001 /* Secure deletion */ 59262724Spfg#define EXT2_UNRM 0x00000002 /* Undelete */ 60262724Spfg#define EXT2_COMPR 0x00000004 /* Compress file */ 61262724Spfg#define EXT2_SYNC 0x00000008 /* Synchronous updates */ 62262724Spfg#define EXT2_IMMUTABLE 0x00000010 /* Immutable file */ 63262724Spfg#define EXT2_APPEND 0x00000020 /* Writes to file may only append */ 64262724Spfg#define EXT2_NODUMP 0x00000040 /* Do not dump file */ 65262724Spfg#define EXT2_NOATIME 0x00000080 /* Do not update atime */ 66262724Spfg#define EXT4_INDEX 0x00001000 /* Hash-indexed directory */ 67262724Spfg#define EXT4_IMAGIC 0x00002000 /* AFS directory */ 68262724Spfg#define EXT4_JOURNAL_DATA 0x00004000 /* File data should be journaled */ 69262724Spfg#define EXT4_NOTAIL 0x00008000 /* File tail should not be merged */ 70262724Spfg#define EXT4_DIRSYNC 0x00010000 /* Dirsync behaviour */ 71262724Spfg#define EXT4_TOPDIR 0x00020000 /* Top of directory hierarchies*/ 72262724Spfg#define EXT4_HUGE_FILE 0x00040000 /* Set to each huge file */ 73262724Spfg#define EXT4_EXTENTS 0x00080000 /* Inode uses extents */ 74262724Spfg#define EXT4_EOFBLOCKS 0x00400000 /* Blocks allocated beyond EOF */ 75244687Spfg 76233322Spfg/* 77233322Spfg * Definitions for nanosecond timestamps. 78233322Spfg * Ext3 inode versioning, 2006-12-13. 79233322Spfg */ 80262724Spfg#define EXT3_EPOCH_BITS 2 81262724Spfg#define EXT3_EPOCH_MASK ((1 << EXT3_EPOCH_BITS) - 1) 82262724Spfg#define EXT3_NSEC_MASK (~0UL << EXT3_EPOCH_BITS) 83202283Slulf 84262724Spfg#define E2DI_HAS_XTIME(ip) (EXT2_HAS_RO_COMPAT_FEATURE(ip->i_e2fs, \ 85251447Spfg EXT2F_ROCOMPAT_EXTRA_ISIZE)) 86262724Spfg#define E2DI_HAS_HUGE_FILE(ip) (EXT2_HAS_RO_COMPAT_FEATURE(ip->i_e2fs, \ 87255183Spfg EXT2F_ROCOMPAT_HUGE_FILE)) 88233322Spfg 89202283Slulf/* 90252099Spfg * Constants relative to the data blocks 91252099Spfg */ 92252099Spfg#define EXT2_NDIR_BLOCKS 12 93252099Spfg#define EXT2_IND_BLOCK EXT2_NDIR_BLOCKS 94252099Spfg#define EXT2_DIND_BLOCK (EXT2_IND_BLOCK + 1) 95252099Spfg#define EXT2_TIND_BLOCK (EXT2_DIND_BLOCK + 1) 96252099Spfg#define EXT2_N_BLOCKS (EXT2_TIND_BLOCK + 1) 97262724Spfg#define EXT2_MAXSYMLINKLEN (EXT2_N_BLOCKS * sizeof(uint32_t)) 98252099Spfg 99252099Spfg/* 100202283Slulf * Structure of an inode on the disk 101202283Slulf */ 102202283Slulfstruct ext2fs_dinode { 103221126Sjhb uint16_t e2di_mode; /* 0: IFMT, permissions; see below. */ 104221126Sjhb uint16_t e2di_uid; /* 2: Owner UID */ 105245356Spfg uint32_t e2di_size; /* 4: Size (in bytes) */ 106245356Spfg uint32_t e2di_atime; /* 8: Access time */ 107245356Spfg uint32_t e2di_ctime; /* 12: Change time */ 108245356Spfg uint32_t e2di_mtime; /* 16: Modification time */ 109245356Spfg uint32_t e2di_dtime; /* 20: Deletion time */ 110221126Sjhb uint16_t e2di_gid; /* 24: Owner GID */ 111221126Sjhb uint16_t e2di_nlink; /* 26: File link count */ 112221126Sjhb uint32_t e2di_nblock; /* 28: Blocks count */ 113221126Sjhb uint32_t e2di_flags; /* 32: Status flags (chflags) */ 114233322Spfg uint32_t e2di_version; /* 36: Low 32 bits inode version */ 115221126Sjhb uint32_t e2di_blocks[EXT2_N_BLOCKS]; /* 40: disk blocks */ 116221126Sjhb uint32_t e2di_gen; /* 100: generation number */ 117245356Spfg uint32_t e2di_facl; /* 104: Low EA block */ 118245356Spfg uint32_t e2di_size_high; /* 108: Upper bits of file size */ 119245356Spfg uint32_t e2di_faddr; /* 112: Fragment address (obsolete) */ 120243742Spfg uint16_t e2di_nblock_high; /* 116: Blocks count bits 47:32 */ 121245356Spfg uint16_t e2di_facl_high; /* 118: File EA bits 47:32 */ 122221126Sjhb uint16_t e2di_uid_high; /* 120: Owner UID top 16 bits */ 123221126Sjhb uint16_t e2di_gid_high; /* 122: Owner GID top 16 bits */ 124262724Spfg uint16_t e2di_chksum_lo; /* 124: Lower inode checksum */ 125245356Spfg uint16_t e2di_lx_reserved; /* 126: Unused */ 126245356Spfg uint16_t e2di_extra_isize; /* 128: Size of this inode */ 127245356Spfg uint16_t e2di_chksum_hi; /* 130: High inode checksum */ 128262724Spfg uint32_t e2di_ctime_extra; /* 132: Extra change time */ 129262724Spfg uint32_t e2di_mtime_extra; /* 136: Extra modification time */ 130262724Spfg uint32_t e2di_atime_extra; /* 140: Extra access time */ 131262724Spfg uint32_t e2di_crtime; /* 144: Creation (birth)time */ 132262724Spfg uint32_t e2di_crtime_extra; /* 148: Extra creation (birth)time */ 133262724Spfg uint32_t e2di_version_hi; /* 152: High bits of inode version */ 134202283Slulf}; 135202283Slulf 136217585Sjhb#endif /* !_FS_EXT2FS_EXT2_DINODE_H_ */ 137202283Slulf 138