ext2_dinode.h revision 305494
12079Siignatyev/*- 22079Siignatyev * Copyright (c) 2009 Aditya Sarawgi 32079Siignatyev * All rights reserved. 42079Siignatyev * 52079Siignatyev * Redistribution and use in source and binary forms, with or without 62079Siignatyev * modification, are permitted provided that the following conditions 72079Siignatyev * are met: 82079Siignatyev * 1. Redistributions of source code must retain the above copyright 92079Siignatyev * notice, this list of conditions and the following disclaimer. 102079Siignatyev * 2. Redistributions in binary form must reproduce the above copyright 112079Siignatyev * notice, this list of conditions and the following disclaimer in the 122079Siignatyev * documentation and/or other materials provided with the distribution. 132079Siignatyev * 142079Siignatyev * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 152079Siignatyev * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 162079Siignatyev * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 172079Siignatyev * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 182079Siignatyev * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 192079Siignatyev * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 202079Siignatyev * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 212079Siignatyev * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 222079Siignatyev * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 232079Siignatyev * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 242079Siignatyev * SUCH DAMAGE. 252079Siignatyev * 262079Siignatyev * $FreeBSD: stable/10/sys/fs/ext2fs/ext2_dinode.h 305494 2016-09-06 19:53:05Z pfg $ 272079Siignatyev */ 282079Siignatyev 292079Siignatyev#ifndef _FS_EXT2FS_EXT2_DINODE_H_ 302079Siignatyev#define _FS_EXT2FS_EXT2_DINODE_H_ 312079Siignatyev 322079Siignatyev/* 332079Siignatyev * Special inode numbers 342079Siignatyev * The root inode is the root of the file system. Inode 0 can't be used for 352079Siignatyev * normal purposes and bad blocks are normally linked to inode 1, thus 362079Siignatyev * the root inode is 2. 372079Siignatyev * Inode 3 to 10 are reserved in ext2fs. 382079Siignatyev */ 392079Siignatyev#define EXT2_BADBLKINO ((ino_t)1) 402079Siignatyev#define EXT2_ROOTINO ((ino_t)2) 412079Siignatyev#define EXT2_ACLIDXINO ((ino_t)3) 422079Siignatyev#define EXT2_ACLDATAINO ((ino_t)4) 432079Siignatyev#define EXT2_BOOTLOADERINO ((ino_t)5) 442079Siignatyev#define EXT2_UNDELDIRINO ((ino_t)6) 452079Siignatyev#define EXT2_RESIZEINO ((ino_t)7) 462079Siignatyev#define EXT2_JOURNALINO ((ino_t)8) 472079Siignatyev#define EXT2_EXCLUDEINO ((ino_t)9) 482079Siignatyev#define EXT2_REPLICAINO ((ino_t)10) 492079Siignatyev#define EXT2_FIRSTINO ((ino_t)11) 502079Siignatyev 512079Siignatyev/* 522079Siignatyev * Inode flags 532079Siignatyev * The system supports EXT2_IMMUTABLE, EXT2_APPEND and EXT2_NODUMP flags. 542079Siignatyev * The current implementation also uses EXT3_INDEX, EXT4_EXTENTS and 552079Siignatyev * EXT4_HUGE_FILE with some restrictions, imposed the lack of write 562079Siignatyev * support. 572079Siignatyev */ 582079Siignatyev#define EXT2_SECRM 0x00000001 /* Secure deletion */ 592079Siignatyev#define EXT2_UNRM 0x00000002 /* Undelete */ 602079Siignatyev#define EXT2_COMPR 0x00000004 /* Compress file */ 612079Siignatyev#define EXT2_SYNC 0x00000008 /* Synchronous updates */ 622079Siignatyev#define EXT2_IMMUTABLE 0x00000010 /* Immutable file */ 632079Siignatyev#define EXT2_APPEND 0x00000020 /* Writes to file may only append */ 642079Siignatyev#define EXT2_NODUMP 0x00000040 /* Do not dump file */ 652079Siignatyev#define EXT2_NOATIME 0x00000080 /* Do not update atime */ 662079Siignatyev#define EXT3_INDEX 0x00001000 /* Hash-indexed directory */ 672079Siignatyev#define EXT4_IMAGIC 0x00002000 /* AFS directory */ 682079Siignatyev#define EXT4_JOURNAL_DATA 0x00004000 /* File data should be journaled */ 692079Siignatyev#define EXT4_NOTAIL 0x00008000 /* File tail should not be merged */ 702079Siignatyev#define EXT4_DIRSYNC 0x00010000 /* Dirsync behaviour */ 712079Siignatyev#define EXT4_TOPDIR 0x00020000 /* Top of directory hierarchies*/ 722079Siignatyev#define EXT4_HUGE_FILE 0x00040000 /* Set to each huge file */ 732079Siignatyev#define EXT4_EXTENTS 0x00080000 /* Inode uses extents */ 742079Siignatyev#define EXT4_EA_INODE 0x00200000 /* Inode used for large EA */ 752079Siignatyev#define EXT4_EOFBLOCKS 0x00400000 /* Blocks allocated beyond EOF */ 762079Siignatyev#define EXT4_INLINE_DATA 0x10000000 /* Inode has inline data */ 772079Siignatyev#define EXT4_PROJINHERIT 0x20000000 /* Children inherit project ID */ 782079Siignatyev 792079Siignatyev/* 802079Siignatyev * Definitions for nanosecond timestamps. 812079Siignatyev * Ext3 inode versioning, 2006-12-13. 822079Siignatyev */ 832079Siignatyev#define EXT3_EPOCH_BITS 2 842079Siignatyev#define EXT3_EPOCH_MASK ((1 << EXT3_EPOCH_BITS) - 1) 852079Siignatyev#define EXT3_NSEC_MASK (~0UL << EXT3_EPOCH_BITS) 862079Siignatyev 872079Siignatyev#define E2DI_HAS_XTIME(ip) (EXT2_HAS_RO_COMPAT_FEATURE(ip->i_e2fs, \ 882079Siignatyev EXT2F_ROCOMPAT_EXTRA_ISIZE)) 892079Siignatyev#define E2DI_HAS_HUGE_FILE(ip) (EXT2_HAS_RO_COMPAT_FEATURE(ip->i_e2fs, \ 902079Siignatyev EXT2F_ROCOMPAT_HUGE_FILE)) 912079Siignatyev 922079Siignatyev/* 932079Siignatyev * Constants relative to the data blocks 942079Siignatyev */ 952079Siignatyev#define EXT2_NDIR_BLOCKS 12 962079Siignatyev#define EXT2_IND_BLOCK EXT2_NDIR_BLOCKS 972079Siignatyev#define EXT2_DIND_BLOCK (EXT2_IND_BLOCK + 1) 982079Siignatyev#define EXT2_TIND_BLOCK (EXT2_DIND_BLOCK + 1) 992079Siignatyev#define EXT2_N_BLOCKS (EXT2_TIND_BLOCK + 1) 1002079Siignatyev#define EXT2_MAXSYMLINKLEN (EXT2_N_BLOCKS * sizeof(uint32_t)) 1012079Siignatyev 1022079Siignatyev/* 1032079Siignatyev * Structure of an inode on the disk 1042079Siignatyev */ 1052079Siignatyevstruct ext2fs_dinode { 1062079Siignatyev uint16_t e2di_mode; /* 0: IFMT, permissions; see below. */ 1072079Siignatyev uint16_t e2di_uid; /* 2: Owner UID */ 1082079Siignatyev uint32_t e2di_size; /* 4: Size (in bytes) */ 1092079Siignatyev uint32_t e2di_atime; /* 8: Access time */ 1102079Siignatyev uint32_t e2di_ctime; /* 12: Change time */ 1112079Siignatyev uint32_t e2di_mtime; /* 16: Modification time */ 1122079Siignatyev uint32_t e2di_dtime; /* 20: Deletion time */ 1132079Siignatyev uint16_t e2di_gid; /* 24: Owner GID */ 1142079Siignatyev uint16_t e2di_nlink; /* 26: File link count */ 1152079Siignatyev uint32_t e2di_nblock; /* 28: Blocks count */ 1162079Siignatyev uint32_t e2di_flags; /* 32: Status flags (chflags) */ 1172079Siignatyev uint32_t e2di_version; /* 36: Low 32 bits inode version */ 1182079Siignatyev uint32_t e2di_blocks[EXT2_N_BLOCKS]; /* 40: disk blocks */ 1192079Siignatyev uint32_t e2di_gen; /* 100: generation number */ 1202079Siignatyev uint32_t e2di_facl; /* 104: Low EA block */ 1212079Siignatyev uint32_t e2di_size_high; /* 108: Upper bits of file size */ 1222079Siignatyev uint32_t e2di_faddr; /* 112: Fragment address (obsolete) */ 1232079Siignatyev uint16_t e2di_nblock_high; /* 116: Blocks count bits 47:32 */ 1242079Siignatyev uint16_t e2di_facl_high; /* 118: File EA bits 47:32 */ 1252079Siignatyev uint16_t e2di_uid_high; /* 120: Owner UID top 16 bits */ 1262079Siignatyev uint16_t e2di_gid_high; /* 122: Owner GID top 16 bits */ 1272079Siignatyev uint16_t e2di_chksum_lo; /* 124: Lower inode checksum */ 1282079Siignatyev uint16_t e2di_lx_reserved; /* 126: Unused */ 1292079Siignatyev uint16_t e2di_extra_isize; /* 128: Size of this inode */ 1302079Siignatyev uint16_t e2di_chksum_hi; /* 130: High inode checksum */ 1312079Siignatyev uint32_t e2di_ctime_extra; /* 132: Extra change time */ 1322079Siignatyev uint32_t e2di_mtime_extra; /* 136: Extra modification time */ 1332079Siignatyev uint32_t e2di_atime_extra; /* 140: Extra access time */ 1342079Siignatyev uint32_t e2di_crtime; /* 144: Creation (birth)time */ 1352079Siignatyev uint32_t e2di_crtime_extra; /* 148: Extra creation (birth)time */ 1362079Siignatyev uint32_t e2di_version_hi; /* 152: High bits of inode version */ 1372079Siignatyev uint32_t e2di_projid; /* 156: Project ID */ 1382079Siignatyev}; 1392079Siignatyev 1402079Siignatyev#endif /* !_FS_EXT2FS_EXT2_DINODE_H_ */ 1412079Siignatyev 1422079Siignatyev