FreeBSD/Linux Kernel Cross Reference
sys/fs/ext2fs/inode.h
1 /*-
2 * Copyright (c) 1982, 1989, 1993
3 * The Regents of the University of California. All rights reserved.
4 * (c) UNIX System Laboratories, Inc.
5 * All or some portions of this file are derived from material licensed
6 * to the University of California by American Telephone and Telegraph
7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
8 * the permission of UNIX System Laboratories, Inc.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 4. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 * @(#)inode.h 8.9 (Berkeley) 5/14/95
35 * $FreeBSD: releng/9.2/sys/fs/ext2fs/inode.h 252234 2013-06-26 04:34:16Z pfg $
36 */
37
38 #ifndef _FS_EXT2FS_INODE_H_
39 #define _FS_EXT2FS_INODE_H_
40
41 #include <sys/lock.h>
42 #include <sys/queue.h>
43
44 /*
45 * This must agree with the definition in <ufs/ufs/dir.h>.
46 */
47 #define doff_t int32_t
48
49 #define NDADDR 12 /* Direct addresses in inode. */
50 #define NIADDR 3 /* Indirect addresses in inode. */
51
52 /*
53 * The size of physical and logical block numbers and time fields in UFS.
54 */
55 typedef int32_t e2fs_lbn_t;
56
57 /*
58 * The inode is used to describe each active (or recently active) file in the
59 * EXT2FS filesystem. It is composed of two types of information. The first
60 * part is the information that is needed only while the file is active (such
61 * as the identity of the file and linkage to speed its lookup). The second
62 * part is the permanent meta-data associated with the file which is read in
63 * from the permanent dinode from long term storage when the file becomes
64 * active, and is put back when the file is no longer being used.
65 */
66 struct inode {
67 struct vnode *i_vnode;/* Vnode associated with this inode. */
68 struct ext2mount *i_ump;
69 uint32_t i_flag; /* flags, see below */
70 ino_t i_number; /* The identity of the inode. */
71
72 struct m_ext2fs *i_e2fs; /* EXT2FS */
73 u_quad_t i_modrev; /* Revision level for NFS lease. */
74 /*
75 * Side effects; used during directory lookup.
76 */
77 int32_t i_count; /* Size of free slot in directory. */
78 doff_t i_endoff; /* End of useful stuff in directory. */
79 doff_t i_diroff; /* Offset in dir, where we found last entry. */
80 doff_t i_offset; /* Offset of free space in directory. */
81
82 uint32_t i_block_group;
83 uint32_t i_next_alloc_block;
84 uint32_t i_next_alloc_goal;
85
86 /* Fields from struct dinode in UFS. */
87 uint16_t i_mode; /* IFMT, permissions; see below. */
88 int16_t i_nlink; /* File link count. */
89 uint64_t i_size; /* File byte count. */
90 int32_t i_atime; /* Last access time. */
91 int32_t i_mtime; /* Last modified time. */
92 int32_t i_ctime; /* Last inode change time. */
93 int32_t i_birthtime; /* Inode creation time. */
94 int32_t i_mtimensec; /* Last modified time. */
95 int32_t i_atimensec; /* Last access time. */
96 int32_t i_ctimensec; /* Last inode change time. */
97 int32_t i_birthnsec; /* Inode creation time. */
98 uint32_t i_db[NDADDR]; /* Direct disk blocks. */
99 uint32_t i_ib[NIADDR]; /* Indirect disk blocks. */
100 uint32_t i_flags; /* Status flags (chflags). */
101 uint32_t i_blocks; /* Blocks actually held. */
102 uint32_t i_gen; /* Generation number. */
103 uint32_t i_uid; /* File owner. */
104 uint32_t i_gid; /* File group. */
105 };
106
107 /*
108 * The di_db fields may be overlaid with other information for
109 * file types that do not have associated disk storage. Block
110 * and character devices overlay the first data block with their
111 * dev_t value. Short symbolic links place their path in the
112 * di_db area.
113 */
114 #define i_shortlink i_db
115 #define i_rdev i_db[0]
116
117 /* File permissions. */
118 #define IEXEC 0000100 /* Executable. */
119 #define IWRITE 0000200 /* Writeable. */
120 #define IREAD 0000400 /* Readable. */
121 #define ISVTX 0001000 /* Sticky bit. */
122 #define ISGID 0002000 /* Set-gid. */
123 #define ISUID 0004000 /* Set-uid. */
124
125 /* File types. */
126 #define IFMT 0170000 /* Mask of file type. */
127 #define IFIFO 0010000 /* Named pipe (fifo). */
128 #define IFCHR 0020000 /* Character device. */
129 #define IFDIR 0040000 /* Directory file. */
130 #define IFBLK 0060000 /* Block device. */
131 #define IFREG 0100000 /* Regular file. */
132 #define IFLNK 0120000 /* Symbolic link. */
133 #define IFSOCK 0140000 /* UNIX domain socket. */
134 #define IFWHT 0160000 /* Whiteout. */
135
136 /* These flags are kept in i_flag. */
137 #define IN_ACCESS 0x0001 /* Access time update request. */
138 #define IN_CHANGE 0x0002 /* Inode change time update request. */
139 #define IN_UPDATE 0x0004 /* Modification time update request. */
140 #define IN_MODIFIED 0x0008 /* Inode has been modified. */
141 #define IN_RENAME 0x0010 /* Inode is being renamed. */
142 #define IN_HASHED 0x0020 /* Inode is on hash list */
143 #define IN_LAZYMOD 0x0040 /* Modified, but don't write yet. */
144 #define IN_SPACECOUNTED 0x0080 /* Blocks to be freed in free count. */
145 #define IN_LAZYACCESS 0x0100 /* Process IN_ACCESS after the
146 suspension finished */
147
148 #define i_devvp i_ump->um_devvp
149
150 #ifdef _KERNEL
151 /*
152 * Structure used to pass around logical block paths generated by
153 * ext2_getlbns and used by truncate and bmap code.
154 */
155 struct indir {
156 e2fs_lbn_t in_lbn; /* Logical block number. */
157 int in_off; /* Offset in buffer. */
158 };
159
160 /* Convert between inode pointers and vnode pointers. */
161 #define VTOI(vp) ((struct inode *)(vp)->v_data)
162 #define ITOV(ip) ((ip)->i_vnode)
163
164 /* This overlays the fid structure (see mount.h). */
165 struct ufid {
166 uint16_t ufid_len; /* Length of structure. */
167 uint16_t ufid_pad; /* Force 32-bit alignment. */
168 ino_t ufid_ino; /* File number (ino). */
169 uint32_t ufid_gen; /* Generation number. */
170 };
171 #endif /* _KERNEL */
172
173 #endif /* !_FS_EXT2FS_INODE_H_ */
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