1/* $OpenBSD: ext2fs_dinode.h,v 1.17 2014/07/31 17:37:52 pelikan Exp $ */
2/* $NetBSD: ext2fs_dinode.h,v 1.6 2000/01/26 16:21:33 bouyer Exp $ */
3
4/*
5 * Copyright (c) 1997 Manuel Bouyer.
6 * Copyright (c) 1982, 1989, 1993
7 * The Regents of the University of California. All rights reserved.
8 * (c) UNIX System Laboratories, Inc.
9 * All or some portions of this file are derived from material licensed
10 * to the University of California by American Telephone and Telegraph
11 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
12 * the permission of UNIX System Laboratories, Inc.
13 *
14 * Redistribution and use in source and binary forms, with or without
15 * modification, are permitted provided that the following conditions
16 * are met:
17 * 1. Redistributions of source code must retain the above copyright
18 * notice, this list of conditions and the following disclaimer.
19 * 2. Redistributions in binary form must reproduce the above copyright
20 * notice, this list of conditions and the following disclaimer in the
21 * documentation and/or other materials provided with the distribution.
22 * 3. Neither the name of the University nor the names of its contributors
23 * may be used to endorse or promote products derived from this software
24 * without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
37 *
38 * @(#)dinode.h 8.6 (Berkeley) 9/13/94
39 * Modified for ext2fs by Manuel Bouyer.
40 */
41
42#include <sys/stat.h>
43#include <ufs/ufs/dinode.h> /* for ufsino_t */
44
45/*
46 * The root inode is the root of the file system. Inode 0 can't be used for
47 * normal purposes and bad blocks are normally linked to inode 1, thus
48 * the root inode is 2.
49 * Inode 3 to 10 are reserved in ext2fs.
50 */
51#define EXT2_ROOTINO ((ufsino_t)2)
52#define EXT2_RESIZEINO ((ufsino_t)7)
53#define EXT2_FIRSTINO ((ufsino_t)11)
54
55/*
56 * A dinode contains all the meta-data associated with a UFS file.
57 * This structure defines the on-disk format of a dinode. Since
58 * this structure describes an on-disk structure, all its fields
59 * are defined by types with precise widths.
60 */
61
62#define NDADDR 12 /* Direct addresses in inode. */
63#define NIADDR 3 /* Indirect addresses in inode. */
64
65#define EXT2_MAXSYMLINKLEN ((NDADDR+NIADDR) * sizeof (u_int32_t))
66
67struct ext2fs_dinode {
68 u_int16_t e2di_mode; /* 0: IFMT, permissions; see below. */
69 u_int16_t e2di_uid_low; /* 2: owner UID, bits 15:0 */
70 u_int32_t e2di_size; /* 4: file size (bytes) bits 31:0 */
71 u_int32_t e2di_atime; /* 8: Access time */
72 u_int32_t e2di_ctime; /* 12: Change time */
73 u_int32_t e2di_mtime; /* 16: Modification time */
74 u_int32_t e2di_dtime; /* 20: Deletion time */
75 u_int16_t e2di_gid_low; /* 24: Owner GID, lowest bits */
76 u_int16_t e2di_nlink; /* 26: File link count */
77 u_int32_t e2di_nblock; /* 28: blocks count */
78 u_int32_t e2di_flags; /* 32: status flags (chflags) */
79 u_int32_t e2di_version_lo; /* 36: inode version, bits 31:0 */
80 u_int32_t e2di_blocks[NDADDR+NIADDR]; /* 40: disk blocks */
81 u_int32_t e2di_gen; /* 100: generation number */
82 u_int32_t e2di_facl; /* 104: file ACL, bits 31:0 */
83 u_int32_t e2di_size_hi; /* 108: file size (bytes), bits 63:32 */
84 u_int32_t e2di_faddr; /* 112: fragment address (obsolete) */
85 u_int16_t e2di_nblock_hi; /* 116: blocks count, bits 47:32 */
86 u_int16_t e2di_facl_hi; /* 118: file ACL, bits 47:32 */
87 u_int16_t e2di_uid_high; /* 120: owner UID, bits 31:16 */
88 u_int16_t e2di_gid_high; /* 122: owner GID, bits 31:16 */
89 u_int16_t e2di_chksum_lo; /* 124: inode checksum, bits 15:0 */
90 u_int16_t e2di__reserved; /* 126: unused */
91 u_int16_t e2di_isize; /* 128: size of this inode */
92 u_int16_t e2di_chksum_hi; /* 130: inode checksum, bits 31:16 */
93 u_int32_t e2di_x_ctime; /* 132: extra Change time */
94 u_int32_t e2di_x_mtime; /* 136: extra Modification time */
95 u_int32_t e2di_x_atime; /* 140: extra Access time */
96 u_int32_t e2di_crtime; /* 144: Creation (birth) time */
97 u_int32_t e2di_x_crtime; /* 148: extra Creation (birth) time */
98 u_int32_t e2di_version_hi; /* 152: inode version, bits 63:31 */
99};
100
101#define E2MAXSYMLINKLEN ((NDADDR + NIADDR) * sizeof(u_int32_t))
102
103/* File permissions. */
104#define EXT2_IEXEC 0000100 /* Executable. */
105#define EXT2_IWRITE 0000200 /* Writeable. */
106#define EXT2_IREAD 0000400 /* Readable. */
107#define EXT2_ISVTX 0001000 /* Sticky bit. */
108#define EXT2_ISGID 0002000 /* Set-gid. */
109#define EXT2_ISUID 0004000 /* Set-uid. */
110
111/* File types. */
112#define EXT2_IFMT 0170000 /* Mask of file type. */
113#define EXT2_IFIFO 0010000 /* Named pipe (fifo). */
114#define EXT2_IFCHR 0020000 /* Character device. */
115#define EXT2_IFDIR 0040000 /* Directory file. */
116#define EXT2_IFBLK 0060000 /* Block device. */
117#define EXT2_IFREG 0100000 /* Regular file. */
118#define EXT2_IFLNK 0120000 /* Symbolic link. */
119#define EXT2_IFSOCK 0140000 /* UNIX domain socket. */
120
121/* file flags */
122#define EXT2_SECRM 0x00000001 /* Secure deletion */
123#define EXT2_UNRM 0x00000002 /* Undelete */
124#define EXT2_COMPR 0x00000004 /* Compress file */
125#define EXT2_SYNC 0x00000008 /* Synchronous updates */
126#define EXT2_IMMUTABLE 0x00000010 /* Immutable file */
127#define EXT2_APPEND 0x00000020 /* writes to file may only append */
128#define EXT2_NODUMP 0x00000040 /* do not dump file */
129#define EXT2_NOATIME 0x00000080 /* do not update access time */
130#define EXT4_INDEX 0x00001000 /* hash-indexed directory */
131#define EXT4_JOURNAL_DATA 0x00004000 /* file data should be journaled */
132#define EXT4_DIRSYNC 0x00010000 /* all dirent updates done synchronously */
133#define EXT4_TOPDIR 0x00020000 /* top of directory hierarchies */
134#define EXT4_HUGE_FILE 0x00040000 /* nblocks unit is fsb, not db */
135#define EXT4_EXTENTS 0x00080000 /* inode uses extents */
136#define EXT4_EOFBLOCKS 0x00400000 /* blocks allocated beyond EOF */
137
138/* Size of on-disk inode. */
139#define EXT2_REV0_DINODE_SIZE 128
140#define EXT2_DINODE_SIZE(fs) ((fs)->e2fs.e2fs_rev > E2FS_REV0 ? \
141 (fs)->e2fs.e2fs_inode_size : \
142 EXT2_REV0_DINODE_SIZE)
143
144/*
145 * The e2di_blocks fields may be overlaid with other information for
146 * file types that do not have associated disk storage. Block
147 * and character devices overlay the first data block with their
148 * dev_t value. Short symbolic links place their path in the
149 * di_db area.
150 */
151
152#define e2di_rdev e2di_blocks[0]
153#define e2di_shortlink e2di_blocks
154
155/* e2fs needs byte swapping on big-endian systems */
156#if BYTE_ORDER == LITTLE_ENDIAN
157# define e2fs_iload(fs, old, new) \
158 memcpy((new),(old), MIN(EXT2_DINODE_SIZE(fs), sizeof(*new)))
159# define e2fs_isave(fs, old, new) \
160 memcpy((new),(old), MIN(EXT2_DINODE_SIZE(fs), sizeof(*new)))
161#else
162struct m_ext2fs;
163void e2fs_i_bswap(struct m_ext2fs *, struct ext2fs_dinode *, struct ext2fs_dinode *);
164# define e2fs_iload(fs, old, new) e2fs_i_bswap((fs), (old), (new))
165# define e2fs_isave(fs, old, new) e2fs_i_bswap((fs), (old), (new))
166#endif