FreeBSD/Linux Kernel Cross Reference
sys/ufs/ufs/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: src/sys/ufs/ufs/inode.h,v 1.49 2005/03/14 10:21:16 phk Exp $
36 */
37
38 #ifndef _UFS_UFS_INODE_H_
39 #define _UFS_UFS_INODE_H_
40
41 #include <sys/lock.h>
42 #include <sys/queue.h>
43 #include <ufs/ufs/dinode.h>
44
45 /*
46 * This must agree with the definition in <ufs/ufs/dir.h>.
47 */
48 #define doff_t int32_t
49
50 /*
51 * The inode is used to describe each active (or recently active) file in the
52 * UFS filesystem. It is composed of two types of information. The first part
53 * is the information that is needed only while the file is active (such as
54 * the identity of the file and linkage to speed its lookup). The second part
55 * is the permanent meta-data associated with the file which is read in
56 * from the permanent dinode from long term storage when the file becomes
57 * active, and is put back when the file is no longer being used.
58 */
59 struct inode {
60 TAILQ_ENTRY(inode) i_nextsnap; /* snapshot file list. */
61 struct vnode *i_vnode;/* Vnode associated with this inode. */
62 struct ufsmount *i_ump;/* Ufsmount point associated with this inode. */
63 u_int32_t i_flag; /* flags, see below */
64 struct cdev *i_dev; /* Device associated with the inode. */
65 ino_t i_number; /* The identity of the inode. */
66 int i_effnlink; /* i_nlink when I/O completes */
67
68 struct fs *i_fs; /* Associated filesystem superblock. */
69 struct dquot *i_dquot[MAXQUOTAS]; /* Dquot structures. */
70 u_quad_t i_modrev; /* Revision level for NFS lease. */
71 struct lockf *i_lockf;/* Head of byte-level lock list. */
72 /*
73 * Side effects; used during directory lookup.
74 */
75 int32_t i_count; /* Size of free slot in directory. */
76 doff_t i_endoff; /* End of useful stuff in directory. */
77 doff_t i_diroff; /* Offset in dir, where we found last entry. */
78 doff_t i_offset; /* Offset of free space in directory. */
79 ino_t i_ino; /* Inode number of found directory. */
80 u_int32_t i_reclen; /* Size of found directory entry. */
81
82 union {
83 struct dirhash *dirhash; /* Hashing for large directories. */
84 daddr_t *snapblklist; /* Collect expunged snapshot blocks. */
85 } i_un;
86
87 /*
88 * Data for extended attribute modification.
89 */
90 u_char *i_ea_area; /* Pointer to malloced copy of EA area */
91 unsigned i_ea_len; /* Length of i_ea_area */
92 int i_ea_error; /* First errno in transaction */
93
94 /*
95 * Copies from the on-disk dinode itself.
96 */
97 u_int16_t i_mode; /* IFMT, permissions; see below. */
98 int16_t i_nlink; /* File link count. */
99 u_int64_t i_size; /* File byte count. */
100 u_int32_t i_flags; /* Status flags (chflags). */
101 int64_t i_gen; /* Generation number. */
102 u_int32_t i_uid; /* File owner. */
103 u_int32_t i_gid; /* File group. */
104 /*
105 * The real copy of the on-disk inode.
106 */
107 union {
108 struct ufs1_dinode *din1; /* UFS1 on-disk dinode. */
109 struct ufs2_dinode *din2; /* UFS2 on-disk dinode. */
110 } dinode_u;
111 };
112 /*
113 * These flags are kept in i_flag.
114 */
115 #define IN_ACCESS 0x0001 /* Access time update request. */
116 #define IN_CHANGE 0x0002 /* Inode change time update request. */
117 #define IN_UPDATE 0x0004 /* Modification time update request. */
118 #define IN_MODIFIED 0x0008 /* Inode has been modified. */
119 #define IN_RENAME 0x0010 /* Inode is being renamed. */
120 #define IN_LAZYMOD 0x0040 /* Modified, but don't write yet. */
121 #define IN_SPACECOUNTED 0x0080 /* Blocks to be freed in free count. */
122
123 #define i_devvp i_ump->um_devvp
124 #define i_umbufobj i_ump->um_bo
125 #define i_dirhash i_un.dirhash
126 #define i_snapblklist i_un.snapblklist
127 #define i_din1 dinode_u.din1
128 #define i_din2 dinode_u.din2
129
130 #ifdef _KERNEL
131 /*
132 * The DIP macro is used to access fields in the dinode that are
133 * not cached in the inode itself.
134 */
135 #define DIP(ip, field) \
136 (((ip)->i_ump->um_fstype == UFS1) ? \
137 (ip)->i_din1->d##field : (ip)->i_din2->d##field)
138 #define DIP_SET(ip, field, val) do { \
139 if ((ip)->i_ump->um_fstype == UFS1) \
140 (ip)->i_din1->d##field = (val); \
141 else \
142 (ip)->i_din2->d##field = (val); \
143 } while (0)
144
145 #define MAXSYMLINKLEN(ip) \
146 ((ip)->i_ump->um_fstype == UFS1) ? \
147 ((NDADDR + NIADDR) * sizeof(ufs1_daddr_t)) : \
148 ((NDADDR + NIADDR) * sizeof(ufs2_daddr_t))
149 #define SHORTLINK(ip) \
150 (((ip)->i_ump->um_fstype == UFS1) ? \
151 (caddr_t)(ip)->i_din1->di_db : (caddr_t)(ip)->i_din2->di_db)
152
153 /*
154 * Structure used to pass around logical block paths generated by
155 * ufs_getlbns and used by truncate and bmap code.
156 */
157 struct indir {
158 ufs2_daddr_t in_lbn; /* Logical block number. */
159 int in_off; /* Offset in buffer. */
160 int in_exists; /* Flag if the block exists. */
161 };
162
163 /* Convert between inode pointers and vnode pointers. */
164 #define VTOI(vp) ((struct inode *)(vp)->v_data)
165 #define ITOV(ip) ((ip)->i_vnode)
166
167 /* Determine if soft dependencies are being done */
168 #define DOINGSOFTDEP(vp) ((vp)->v_mount->mnt_flag & MNT_SOFTDEP)
169 #define DOINGASYNC(vp) ((vp)->v_mount->mnt_flag & MNT_ASYNC)
170
171 /* This overlays the fid structure (see mount.h). */
172 struct ufid {
173 u_int16_t ufid_len; /* Length of structure. */
174 u_int16_t ufid_pad; /* Force 32-bit alignment. */
175 ino_t ufid_ino; /* File number (ino). */
176 int32_t ufid_gen; /* Generation number. */
177 };
178 #endif /* _KERNEL */
179
180 #endif /* !_UFS_UFS_INODE_H_ */
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