1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2009 Aditya Sarawgi
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 * $FreeBSD: releng/12.0/sys/fs/ext2fs/ext2_dinode.h 331095 2018-03-17 12:59:55Z emaste $
29 */
30
31 #ifndef _FS_EXT2FS_EXT2_DINODE_H_
32 #define _FS_EXT2FS_EXT2_DINODE_H_
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_EXCLUDEINO ((ino_t)9)
50 #define EXT2_REPLICAINO ((ino_t)10)
51 #define EXT2_FIRSTINO ((ino_t)11)
52
53 /*
54 * Inode flags
55 * The system supports EXT2_IMMUTABLE, EXT2_APPEND and EXT2_NODUMP flags.
56 * The current implementation also uses EXT3_INDEX, EXT4_EXTENTS and
57 * EXT4_HUGE_FILE with some restrictions imposed by the lack of write
58 * support.
59 */
60 #define EXT2_SECRM 0x00000001 /* Secure deletion */
61 #define EXT2_UNRM 0x00000002 /* Undelete */
62 #define EXT2_COMPR 0x00000004 /* Compress file */
63 #define EXT2_SYNC 0x00000008 /* Synchronous updates */
64 #define EXT2_IMMUTABLE 0x00000010 /* Immutable file */
65 #define EXT2_APPEND 0x00000020 /* Writes to file may only append */
66 #define EXT2_NODUMP 0x00000040 /* Do not dump file */
67 #define EXT2_NOATIME 0x00000080 /* Do not update atime */
68 #define EXT3_INDEX 0x00001000 /* Hash-indexed directory */
69 #define EXT4_IMAGIC 0x00002000 /* AFS directory */
70 #define EXT4_JOURNAL_DATA 0x00004000 /* File data should be journaled */
71 #define EXT4_NOTAIL 0x00008000 /* File tail should not be merged */
72 #define EXT4_DIRSYNC 0x00010000 /* Dirsync behaviour */
73 #define EXT4_TOPDIR 0x00020000 /* Top of directory hierarchies*/
74 #define EXT4_HUGE_FILE 0x00040000 /* Set to each huge file */
75 #define EXT4_EXTENTS 0x00080000 /* Inode uses extents */
76 #define EXT4_EA_INODE 0x00200000 /* Inode used for large EA */
77 #define EXT4_EOFBLOCKS 0x00400000 /* Blocks allocated beyond EOF */
78 #define EXT4_INLINE_DATA 0x10000000 /* Inode has inline data */
79 #define EXT4_PROJINHERIT 0x20000000 /* Children inherit project ID */
80
81 /*
82 * Definitions for nanosecond timestamps.
83 * Ext3 inode versioning, 2006-12-13.
84 */
85 #define EXT3_EPOCH_BITS 2
86 #define EXT3_EPOCH_MASK ((1 << EXT3_EPOCH_BITS) - 1)
87 #define EXT3_NSEC_MASK (~0UL << EXT3_EPOCH_BITS)
88
89 #define E2DI_HAS_XTIME(ip) (EXT2_HAS_RO_COMPAT_FEATURE(ip->i_e2fs, \
90 EXT2F_ROCOMPAT_EXTRA_ISIZE))
91 #define E2DI_HAS_HUGE_FILE(ip) (EXT2_HAS_RO_COMPAT_FEATURE(ip->i_e2fs, \
92 EXT2F_ROCOMPAT_HUGE_FILE))
93
94 /*
95 * Constants relative to the data blocks
96 */
97 #define EXT2_NDIR_BLOCKS 12
98 #define EXT2_IND_BLOCK EXT2_NDIR_BLOCKS
99 #define EXT2_DIND_BLOCK (EXT2_IND_BLOCK + 1)
100 #define EXT2_TIND_BLOCK (EXT2_DIND_BLOCK + 1)
101 #define EXT2_N_BLOCKS (EXT2_TIND_BLOCK + 1)
102 #define EXT2_MAXSYMLINKLEN (EXT2_N_BLOCKS * sizeof(uint32_t))
103
104 /*
105 * Structure of an inode on the disk
106 */
107 struct ext2fs_dinode {
108 uint16_t e2di_mode; /* 0: IFMT, permissions; see below. */
109 uint16_t e2di_uid; /* 2: Owner UID */
110 uint32_t e2di_size; /* 4: Size (in bytes) */
111 uint32_t e2di_atime; /* 8: Access time */
112 uint32_t e2di_ctime; /* 12: Change time */
113 uint32_t e2di_mtime; /* 16: Modification time */
114 uint32_t e2di_dtime; /* 20: Deletion time */
115 uint16_t e2di_gid; /* 24: Owner GID */
116 uint16_t e2di_nlink; /* 26: File link count */
117 uint32_t e2di_nblock; /* 28: Blocks count */
118 uint32_t e2di_flags; /* 32: Status flags (chflags) */
119 uint32_t e2di_version; /* 36: Low 32 bits inode version */
120 uint32_t e2di_blocks[EXT2_N_BLOCKS]; /* 40: disk blocks */
121 uint32_t e2di_gen; /* 100: generation number */
122 uint32_t e2di_facl; /* 104: Low EA block */
123 uint32_t e2di_size_high; /* 108: Upper bits of file size */
124 uint32_t e2di_faddr; /* 112: Fragment address (obsolete) */
125 uint16_t e2di_nblock_high; /* 116: Blocks count bits 47:32 */
126 uint16_t e2di_facl_high; /* 118: File EA bits 47:32 */
127 uint16_t e2di_uid_high; /* 120: Owner UID top 16 bits */
128 uint16_t e2di_gid_high; /* 122: Owner GID top 16 bits */
129 uint16_t e2di_chksum_lo; /* 124: Lower inode checksum */
130 uint16_t e2di_lx_reserved; /* 126: Unused */
131 uint16_t e2di_extra_isize; /* 128: Size of this inode */
132 uint16_t e2di_chksum_hi; /* 130: High inode checksum */
133 uint32_t e2di_ctime_extra; /* 132: Extra change time */
134 uint32_t e2di_mtime_extra; /* 136: Extra modification time */
135 uint32_t e2di_atime_extra; /* 140: Extra access time */
136 uint32_t e2di_crtime; /* 144: Creation (birth)time */
137 uint32_t e2di_crtime_extra; /* 148: Extra creation (birth)time */
138 uint32_t e2di_version_hi; /* 152: High bits of inode version */
139 uint32_t e2di_projid; /* 156: Project ID */
140 };
141
142 #endif /* !_FS_EXT2FS_EXT2_DINODE_H_ */
143
Cache object: 74034992127ddc7bd2043a72e6865342
|