1 /* $OpenBSD: ext2fs_dinode.h,v 1.10 2005/10/06 17:51:27 pedro 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
44 /*
45 * The root inode is the root of the file system. Inode 0 can't be used for
46 * normal purposes and bad blocks are normally linked to inode 1, thus
47 * the root inode is 2.
48 * Inode 3 to 10 are reserved in ext2fs.
49 */
50 #define EXT2_ROOTINO ((ino_t)2)
51 #define EXT2_FIRSTINO ((ino_t)11)
52
53 /*
54 * A dinode contains all the meta-data associated with a UFS file.
55 * This structure defines the on-disk format of a dinode. Since
56 * this structure describes an on-disk structure, all its fields
57 * are defined by types with precise widths.
58 */
59
60 #define NDADDR 12 /* Direct addresses in inode. */
61 #define NIADDR 3 /* Indirect addresses in inode. */
62
63 #define EXT2_MAXSYMLINKLEN ((NDADDR+NIADDR) * sizeof (u_int32_t))
64
65 struct ext2fs_dinode {
66 u_int16_t e2di_mode; /* 0: IFMT, permissions; see below. */
67 u_int16_t e2di_uid_low; /* 2: Owner UID, lowest bits */
68 u_int32_t e2di_size; /* 4: Size (in bytes) */
69 u_int32_t e2di_atime; /* 8: Access time */
70 u_int32_t e2di_ctime; /* 12: Create time */
71 u_int32_t e2di_mtime; /* 16: Modification time */
72 u_int32_t e2di_dtime; /* 20: Deletion time */
73 u_int16_t e2di_gid_low; /* 24: Owner GID, lowest bits */
74 u_int16_t e2di_nlink; /* 26: File link count */
75 u_int32_t e2di_nblock; /* 28: Blocks count */
76 u_int32_t e2di_flags; /* 32: Status flags (chflags) */
77 u_int32_t e2di_linux_reserved1; /* 36 */
78 u_int32_t e2di_blocks[NDADDR+NIADDR]; /* 40: disk blocks */
79 u_int32_t e2di_gen; /* 100: generation number */
80 u_int32_t e2di_facl; /* 104: file ACL (not implemented) */
81 u_int32_t e2di_dacl; /* 108: dir ACL (not implemented) */
82 u_int32_t e2di_faddr; /* 112: fragment address */
83 u_int8_t e2di_nfrag; /* 116: fragment number */
84 u_int8_t e2di_fsize; /* 117: fragment size */
85 u_int16_t e2di_linux_reserved2; /* 118 */
86 u_int16_t e2di_uid_high; /* 120: 16 highest bits of uid */
87 u_int16_t e2di_gid_high; /* 122: 16 highest bits of gid */
88 u_int32_t e2di_linux_reserved3; /* 124 */
89 };
90
91 #define E2MAXSYMLINKLEN ((NDADDR + NIADDR) * sizeof(u_int32_t))
92
93 /* File permissions. */
94 #define EXT2_IEXEC 0000100 /* Executable. */
95 #define EXT2_IWRITE 0000200 /* Writeable. */
96 #define EXT2_IREAD 0000400 /* Readable. */
97 #define EXT2_ISVTX 0001000 /* Sticky bit. */
98 #define EXT2_ISGID 0002000 /* Set-gid. */
99 #define EXT2_ISUID 0004000 /* Set-uid. */
100
101 /* File types. */
102 #define EXT2_IFMT 0170000 /* Mask of file type. */
103 #define EXT2_IFIFO 0010000 /* Named pipe (fifo). */
104 #define EXT2_IFCHR 0020000 /* Character device. */
105 #define EXT2_IFDIR 0040000 /* Directory file. */
106 #define EXT2_IFBLK 0060000 /* Block device. */
107 #define EXT2_IFREG 0100000 /* Regular file. */
108 #define EXT2_IFLNK 0120000 /* Symbolic link. */
109 #define EXT2_IFSOCK 0140000 /* UNIX domain socket. */
110
111 /* file flags */
112 #define EXT2_SECRM 0x00000001 /* Secure deletion */
113 #define EXT2_UNRM 0x00000002 /* Undelete */
114 #define EXT2_COMPR 0x00000004 /* Compress file */
115 #define EXT2_SYNC 0x00000008 /* Synchronous updates */
116 #define EXT2_IMMUTABLE 0x00000010 /* Immutable file */
117 #define EXT2_APPEND 0x00000020 /* writes to file may only append */
118 #define EXT2_NODUMP 0x00000040 /* do not dump file */
119
120 /* Size of on-disk inode. */
121 #define EXT2_DINODE_SIZE (sizeof(struct ext2fs_dinode)) /* 128 */
122
123 /*
124 * The e2di_blocks fields may be overlaid with other information for
125 * file types that do not have associated disk storage. Block
126 * and character devices overlay the first data block with their
127 * dev_t value. Short symbolic links place their path in the
128 * di_db area.
129 */
130
131 #define e2di_rdev e2di_blocks[0]
132 #define e2di_shortlink e2di_blocks
133
134 /* e2fs needs byte swapping on big-endian systems */
135 #if BYTE_ORDER == LITTLE_ENDIAN
136 # define e2fs_iload(old, new) memcpy((new),(old),sizeof(struct ext2fs_dinode))
137 # define e2fs_isave(old, new) memcpy((new),(old),sizeof(struct ext2fs_dinode))
138 #else
139 void e2fs_i_bswap(struct ext2fs_dinode *, struct ext2fs_dinode *);
140 # define e2fs_iload(old, new) e2fs_i_bswap((old), (new))
141 # define e2fs_isave(old, new) e2fs_i_bswap((old), (new))
142 #endif