Annotation of sys/ufs/ext2fs/ext2fs_dinode.h, Revision 1.1.1.1
1.1 nbrk 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
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