inode.h revision 1817
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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. 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 * @(#)inode.h 8.4 (Berkeley) 1/21/94 39 * $Id$ 40 */ 41 42#include <ufs/ufs/dinode.h> 43 44/* 45 * Theoretically, directories can be more than 2Gb in length, however, in 46 * practice this seems unlikely. So, we define the type doff_t as a long 47 * to keep down the cost of doing lookup on a 32-bit machine. If you are 48 * porting to a 64-bit architecture, you should make doff_t the same as off_t. 49 */ 50#define doff_t long 51 52/* 53 * The inode is used to describe each active (or recently active) 54 * file in the UFS filesystem. It is composed of two types of 55 * information. The first part is the information that is needed 56 * only while the file is active (such as the identity of the file 57 * and linkage to speed its lookup). The second part is the 58 * permannent meta-data associated with the file which is read 59 * in from the permanent dinode from long term storage when the 60 * file becomes active, and is put back when the file is no longer 61 * being used. 62 */ 63struct inode { 64 struct inode *i_next; /* Hash chain forward. */ 65 struct inode **i_prev; /* Hash chain back. */ 66 struct vnode *i_vnode; /* Vnode associated with this inode. */ 67 struct vnode *i_devvp; /* Vnode for block I/O. */ 68 u_long i_flag; /* I* flags. */ 69 dev_t i_dev; /* Device associated with the inode. */ 70 ino_t i_number; /* The identity of the inode. */ 71 union { /* Associated filesystem. */ 72 struct fs *fs; /* FFS */ 73 struct lfs *lfs; /* LFS */ 74 } inode_u; 75#define i_fs inode_u.fs 76#define i_lfs inode_u.lfs 77 struct dquot *i_dquot[MAXQUOTAS]; /* Dquot structures. */ 78 u_quad_t i_modrev; /* Revision level for lease. */ 79 struct lockf *i_lockf; /* Head of byte-level lock list. */ 80 pid_t i_lockholder; /* DEBUG: holder of inode lock. */ 81 pid_t i_lockwaiter; /* DEBUG: latest blocked for inode lock. */ 82 /* 83 * Side effects; used during directory lookup. 84 */ 85 long i_count; /* Size of free slot in directory. */ 86 doff_t i_endoff; /* End of useful stuff in directory. */ 87 doff_t i_diroff; /* Offset in dir, where we found last entry. */ 88 doff_t i_offset; /* Offset of free space in directory. */ 89 ino_t i_ino; /* Inode number of found directory. */ 90 u_long i_reclen; /* Size of found directory entry. */ 91 long i_spare[11]; /* Spares to round up to 128 bytes. */ 92 /* 93 * The on-disk dinode itself. 94 */ 95 struct dinode i_din; /* 128 bytes of the on-disk dinode. */ 96}; 97 98#define i_atime i_din.di_atime 99#define i_blocks i_din.di_blocks 100#define i_ctime i_din.di_ctime 101#define i_db i_din.di_db 102#define i_flags i_din.di_flags 103#define i_gen i_din.di_gen 104#define i_gid i_din.di_gid 105#define i_ib i_din.di_ib 106#define i_mode i_din.di_mode 107#define i_mtime i_din.di_mtime 108#define i_nlink i_din.di_nlink 109#define i_rdev i_din.di_rdev 110#define i_shortlink i_din.di_shortlink 111#define i_size i_din.di_size 112#define i_uid i_din.di_uid 113 114/* These flags are kept in i_flag. */ 115#define IN_ACCESS 0x0001 /* Access time update request. */ 116#define IN_CHANGE 0x0002 /* Inode change time update request. */ 117#define IN_EXLOCK 0x0004 /* File has exclusive lock. */ 118#define IN_LOCKED 0x0008 /* Inode lock. */ 119#define IN_LWAIT 0x0010 /* Process waiting on file lock. */ 120#define IN_MODIFIED 0x0020 /* Inode has been modified. */ 121#define IN_RENAME 0x0040 /* Inode is being renamed. */ 122#define IN_SHLOCK 0x0080 /* File has shared lock. */ 123#define IN_UPDATE 0x0100 /* Modification time update request. */ 124#define IN_WANTED 0x0200 /* Inode is wanted by a process. */ 125 126#ifdef KERNEL 127/* 128 * Structure used to pass around logical block paths generated by 129 * ufs_getlbns and used by truncate and bmap code. 130 */ 131struct indir { 132 daddr_t in_lbn; /* Logical block number. */ 133 int in_off; /* Offset in buffer. */ 134 int in_exists; /* Flag if the block exists. */ 135}; 136 137/* Convert between inode pointers and vnode pointers. */ 138#define VTOI(vp) ((struct inode *)(vp)->v_data) 139#define ITOV(ip) ((ip)->i_vnode) 140 141#define ITIMES(ip, t1, t2) { \ 142 if ((ip)->i_flag & (IN_ACCESS | IN_CHANGE | IN_UPDATE)) { \ 143 (ip)->i_flag |= IN_MODIFIED; \ 144 if ((ip)->i_flag & IN_ACCESS) \ 145 (ip)->i_atime.ts_sec = (t1)->tv_sec; \ 146 if ((ip)->i_flag & IN_UPDATE) { \ 147 (ip)->i_mtime.ts_sec = (t2)->tv_sec; \ 148 (ip)->i_modrev++; \ 149 } \ 150 if ((ip)->i_flag & IN_CHANGE) \ 151 (ip)->i_ctime.ts_sec = time.tv_sec; \ 152 (ip)->i_flag &= ~(IN_ACCESS | IN_CHANGE | IN_UPDATE); \ 153 } \ 154} 155 156/* This overlays the fid structure (see mount.h). */ 157struct ufid { 158 u_short ufid_len; /* Length of structure. */ 159 u_short ufid_pad; /* Force long alignment. */ 160 ino_t ufid_ino; /* File number (ino). */ 161 long ufid_gen; /* Generation number. */ 162}; 163#endif /* KERNEL */ 164