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 * $FreeBSD$ 27 */ 28 29 #ifndef _FS_EXT2FS_EXT2_DINODE_H_ 30 #define _FS_EXT2FS_EXT2_DINODE_H_ 31 32 #define e2di_size_high e2di_dacl 33 34 /* 35 * Special inode numbers 36 * The root inode is the root of the file system. Inode 0 can't be used for 37 * normal purposes and bad blocks are normally linked to inode 1, thus 38 * the root inode is 2. 39 * Inode 3 to 10 are reserved in ext2fs. 40 */ 41 #define EXT2_BADBLKINO ((ino_t)1) 42 #define EXT2_ROOTINO ((ino_t)2) 43 #define EXT2_ACLIDXINO ((ino_t)3) 44 #define EXT2_ACLDATAINO ((ino_t)4) 45 #define EXT2_BOOTLOADERINO ((ino_t)5) 46 #define EXT2_UNDELDIRINO ((ino_t)6) 47 #define EXT2_RESIZEINO ((ino_t)7) 48 #define EXT2_JOURNALINO ((ino_t)8) 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 EXT2_HTREE 0x00001000 /* HTree-indexed directory */ 65 66 /* 67 * Definitions for nanosecond timestamps. 68 * Ext3 inode versioning, 2006-12-13. 69 */ 70 #define EXT3_EPOCH_BITS 2 71 #define EXT3_EPOCH_MASK ((1 << EXT3_EPOCH_BITS) - 1) 72 #define EXT3_NSEC_MASK (~0UL << EXT3_EPOCH_BITS) 73 74 #define E2DI_HAS_XTIME(ip) (EXT2_INODE_SIZE((ip)->i_e2fs) > \ 75 E2FS_REV0_INODE_SIZE) 76 77 /* 78 * Structure of an inode on the disk 79 */ 80 struct ext2fs_dinode { 81 uint16_t e2di_mode; /* 0: IFMT, permissions; see below. */ 82 uint16_t e2di_uid; /* 2: Owner UID */ 83 uint32_t e2di_size; /* 4: Size (in bytes) */ 84 uint32_t e2di_atime; /* 8: Access time */ 85 uint32_t e2di_ctime; /* 12: Change time */ 86 uint32_t e2di_mtime; /* 16: Modification time */ 87 uint32_t e2di_dtime; /* 20: Deletion time */ 88 uint16_t e2di_gid; /* 24: Owner GID */ 89 uint16_t e2di_nlink; /* 26: File link count */ 90 uint32_t e2di_nblock; /* 28: Blocks count */ 91 uint32_t e2di_flags; /* 32: Status flags (chflags) */ 92 uint32_t e2di_version; /* 36: Low 32 bits inode version */ 93 uint32_t e2di_blocks[EXT2_N_BLOCKS]; /* 40: disk blocks */ 94 uint32_t e2di_gen; /* 100: generation number */ 95 uint32_t e2di_facl; /* 104: file ACL (not implemented) */ 96 uint32_t e2di_dacl; /* 108: dir ACL (not implemented) */ 97 uint32_t e2di_faddr; /* 112: fragment address */ 98 uint8_t e2di_nfrag; /* 116: fragment number */ 99 uint8_t e2di_fsize; /* 117: fragment size */ 100 uint16_t e2di_linux_reserved2; /* 118 */ 101 uint16_t e2di_uid_high; /* 120: Owner UID top 16 bits */ 102 uint16_t e2di_gid_high; /* 122: Owner GID top 16 bits */ 103 uint32_t e2di_linux_reserved3; /* 124 */ 104 uint16_t e2di_extra_isize; 105 uint16_t e2di_pad1; 106 uint32_t e2di_ctime_extra; /* Extra change time */ 107 uint32_t e2di_mtime_extra; /* Extra modification time */ 108 uint32_t e2di_atime_extra; /* Extra access time */ 109 uint32_t e2di_crtime; /* Creation (birth)time */ 110 uint32_t e2di_crtime_extra; /* Extra creation (birth)time */ 111 uint32_t e2di_version_hi; /* High 30 bits of inode version */ 112 }; 113 114 #endif /* !_FS_EXT2FS_EXT2_DINODE_H_ */ 115 116