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/*
* Copyright (c) 1982, 1989, 1993
* The Regents of the University of California. All rights reserved.
* (c) UNIX System Laboratories, Inc.
* All or some portions of this file are derived from material licensed
* to the University of California by American Telephone and Telegraph
* Co. or Unix System Laboratories, Inc. and are reproduced herein with
* the permission of UNIX System Laboratories, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)inode.h 8.4 (Berkeley) 1/21/94
* $Id: inode.h,v 1.8 1996/01/30 23:02:15 mpp Exp $
*/
#ifndef _UFS_UFS_INODE_H_
#define _UFS_UFS_INODE_H_
#include <ufs/ufs/dinode.h>
/*
* Theoretically, directories can be more than 2Gb in length, however, in
* practice this seems unlikely. So, we define the type doff_t as a long
* to keep down the cost of doing lookup on a 32-bit machine. If you are
* porting to a 64-bit architecture, you should make doff_t the same as off_t.
*/
#define doff_t long
/*
* The inode is used to describe each active (or recently active)
* file in the UFS filesystem. It is composed of two types of
* information. The first part is the information that is needed
* only while the file is active (such as the identity of the file
* and linkage to speed its lookup). The second part is the
* permanent meta-data associated with the file which is read
* in from the permanent dinode from long term storage when the
* file becomes active, and is put back when the file is no longer
* being used.
*/
struct inode {
struct inode *i_next; /* Hash chain forward. */
struct inode **i_prev; /* Hash chain back. */
struct vnode *i_vnode; /* Vnode associated with this inode. */
struct vnode *i_devvp; /* Vnode for block I/O. */
u_long i_flag; /* I* flags. */
dev_t i_dev; /* Device associated with the inode. */
ino_t i_number; /* The identity of the inode. */
union { /* Associated filesystem. */
struct fs *fs; /* FFS */
struct lfs *lfs; /* LFS */
struct ext2_sb_info *e2fs; /* EXT2FS */
} inode_u;
#define i_fs inode_u.fs
#define i_lfs inode_u.lfs
#define i_e2fs inode_u.e2fs
struct dquot *i_dquot[MAXQUOTAS]; /* Dquot structures. */
u_quad_t i_modrev; /* Revision level for lease. */
struct lockf *i_lockf; /* Head of byte-level lock list. */
pid_t i_lockholder; /* DEBUG: holder of inode lock. */
pid_t i_lockwaiter; /* DEBUG: latest blocked for inode lock. */
/*
* Side effects; used during directory lookup.
*/
long i_count; /* Size of free slot in directory. */
doff_t i_endoff; /* End of useful stuff in directory. */
doff_t i_diroff; /* Offset in dir, where we found last entry. */
doff_t i_offset; /* Offset of free space in directory. */
ino_t i_ino; /* Inode number of found directory. */
u_long i_reclen; /* Size of found directory entry. */
int i_lockcount; /* Process lock count (recursion) */
long i_spare[10]; /* Spares to round up to 128 bytes. */
/*
* The on-disk dinode itself.
*/
struct dinode i_din; /* 128 bytes of the on-disk dinode. */
};
#define i_atime i_din.di_atime
#define i_blocks i_din.di_blocks
#define i_ctime i_din.di_ctime
#define i_db i_din.di_db
#define i_flags i_din.di_flags
#define i_gen i_din.di_gen
#define i_gid i_din.di_gid
#define i_ib i_din.di_ib
#define i_mode i_din.di_mode
#define i_mtime i_din.di_mtime
#define i_nlink i_din.di_nlink
#define i_rdev i_din.di_rdev
#define i_shortlink i_din.di_shortlink
#define i_size i_din.di_size
#define i_uid i_din.di_uid
/* These flags are kept in i_flag. */
#define IN_ACCESS 0x0001 /* Access time update request. */
#define IN_CHANGE 0x0002 /* Inode change time update request. */
#define IN_EXLOCK 0x0004 /* File has exclusive lock. */
#define IN_LOCKED 0x0008 /* Inode lock. */
#define IN_LWAIT 0x0010 /* Process waiting on file lock. */
#define IN_MODIFIED 0x0020 /* Inode has been modified. */
#define IN_RENAME 0x0040 /* Inode is being renamed. */
#define IN_SHLOCK 0x0080 /* File has shared lock. */
#define IN_UPDATE 0x0100 /* Modification time update request. */
#define IN_WANTED 0x0200 /* Inode is wanted by a process. */
#define IN_RECURSE 0x0400 /* Recursion expected */
#ifdef KERNEL
/*
* Structure used to pass around logical block paths generated by
* ufs_getlbns and used by truncate and bmap code.
*/
struct indir {
daddr_t in_lbn; /* Logical block number. */
int in_off; /* Offset in buffer. */
int in_exists; /* Flag if the block exists. */
};
/* Convert between inode pointers and vnode pointers. */
#define VTOI(vp) ((struct inode *)(vp)->v_data)
#define ITOV(ip) ((ip)->i_vnode)
/*
* XXX this is too long to be a macro, and isn't used in any time-critical
* place; in fact it is only used in ufs_vnops.c so it shouldn't be in a
* header file.
*/
#define ITIMES(ip, t1, t2) { \
long tv_sec = time.tv_sec; \
if ((ip)->i_flag & (IN_ACCESS | IN_CHANGE | IN_UPDATE)) { \
(ip)->i_flag |= IN_MODIFIED; \
if ((ip)->i_flag & IN_ACCESS) \
(ip)->i_atime.tv_sec \
= ((t1) == &time ? tv_sec : (t1)->tv_sec); \
if ((ip)->i_flag & IN_UPDATE) { \
(ip)->i_mtime.tv_sec \
= ((t2) == &time ? tv_sec : (t2)->tv_sec); \
(ip)->i_modrev++; \
} \
if ((ip)->i_flag & IN_CHANGE) \
(ip)->i_ctime.tv_sec = tv_sec; \
(ip)->i_flag &= ~(IN_ACCESS | IN_CHANGE | IN_UPDATE); \
} \
}
/* This overlays the fid structure (see mount.h). */
struct ufid {
u_short ufid_len; /* Length of structure. */
u_short ufid_pad; /* Force long alignment. */
ino_t ufid_ino; /* File number (ino). */
long ufid_gen; /* Generation number. */
};
#endif /* KERNEL */
#endif /* !_UFS_UFS_INODE_H_ */
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