File: [local] / sys / ufs / ufs / inode.h (download)
Revision 1.1, Tue Mar 4 16:16:20 2008 UTC (16 years, 3 months ago) by nbrk
Branch point for: MAIN
Initial revision
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/* $OpenBSD: inode.h,v 1.35 2007/06/02 00:45:50 pedro Exp $ */
/* $NetBSD: inode.h,v 1.8 1995/06/15 23:22:50 cgd Exp $ */
/*
* 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. 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 8.5 (Berkeley) 7/8/94
*/
#include <sys/buf.h>
#include <sys/lock.h>
#include <ufs/ufs/dinode.h>
#include <ufs/ufs/dir.h>
#include <ufs/ext2fs/ext2fs_dinode.h>
/*
* Per-filesystem inode extensions.
*/
struct ext2fs_inode_ext {
int32_t ext2fs_last_lblk; /* last logical block allocated */
int32_t ext2fs_last_blk; /* last block allocated on disk */
u_int32_t ext2fs_effective_uid; /* effective inode uid */
u_int32_t ext2fs_effective_gid; /* effective inode gid */
};
/*
* 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 {
LIST_ENTRY(inode) i_hash; /* Hash chain */
struct vnode *i_vnode;/* Vnode associated with this inode. */
struct ufsmount *i_ump;
u_int32_t i_flag; /* flags, see below */
dev_t i_dev; /* Device associated with the inode. */
ino_t i_number; /* The identity of the inode. */
int i_effnlink; /* i_nlink when I/O completes */
union { /* Associated filesystem. */
struct fs *fs; /* FFS */
struct m_ext2fs *e2fs; /* EXT2FS */
} inode_u;
#define i_fs inode_u.fs
#define i_e2fs inode_u.e2fs
struct cluster_info i_ci;
struct dquot *i_dquot[MAXQUOTAS]; /* Dquot structures. */
u_quad_t i_modrev; /* Revision level for NFS lease. */
struct lockf *i_lockf;/* Head of byte-level lock list. */
struct lock i_lock; /* Inode lock */
/*
* Side effects; used during directory lookup.
*/
int32_t 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_int32_t i_reclen; /* Size of found directory entry. */
/*
* Inode extensions
*/
union {
/* Other extensions could go here... */
struct ext2fs_inode_ext e2fs;
struct dirhash *dirhash;
} inode_ext;
#define i_e2fs_last_lblk inode_ext.e2fs.ext2fs_last_lblk
#define i_e2fs_last_blk inode_ext.e2fs.ext2fs_last_blk
#define i_e2fs_uid inode_ext.e2fs.ext2fs_effective_uid
#define i_e2fs_gid inode_ext.e2fs.ext2fs_effective_gid
#define i_dirhash inode_ext.dirhash
/*
* The on-disk dinode itself.
*/
union {
struct ufs1_dinode *ffs1_din;
struct ufs2_dinode *ffs2_din;
struct ext2fs_dinode *e2fs_din;
} dinode_u;
#define i_din1 dinode_u.ffs1_din
#define i_din2 dinode_u.ffs2_din
#define i_e2din dinode_u.e2fs_din
struct inode_vtbl *i_vtbl;
};
struct inode_vtbl {
int (* iv_truncate)(struct inode *, off_t, int,
struct ucred *);
int (* iv_update)(struct inode *, struct timespec *, struct timespec *,
int waitfor);
int (* iv_inode_alloc)(struct inode *, mode_t mode,
struct ucred *, struct vnode **);
int (* iv_inode_free)(struct inode *, ino_t ino, mode_t mode);
int (* iv_buf_alloc)(struct inode *, off_t, int, struct ucred *,
int, struct buf **);
int (* iv_bufatoff)(struct inode *, off_t offset, char **res,
struct buf **bpp);
};
#define UFS_TRUNCATE(ip, off, flags, cred) \
((ip)->i_vtbl->iv_truncate)((ip), (off), (flags), (cred))
#define UFS_UPDATE(ip, sync) \
((ip)->i_vtbl->iv_update)((ip), NULL, NULL, (sync))
#define UFS_UPDATE2(ip, atime, mtime, sync) \
((ip)->i_vtbl->iv_update)((ip), (atime), (mtime), (sync))
#define UFS_INODE_ALLOC(pip, mode, cred, vpp) \
((pip)->i_vtbl->iv_inode_alloc)((pip), (mode), (cred), (vpp))
#define UFS_INODE_FREE(pip, ino, mode) \
((pip)->i_vtbl->iv_inode_free)((pip), (ino), (mode))
#define UFS_BUF_ALLOC(ip, startoffset, size, cred, flags, bpp) \
((ip)->i_vtbl->iv_buf_alloc)((ip), (startoffset), (size), (cred), \
(flags), (bpp))
#define UFS_BUFATOFF(ip, offset, res, bpp) \
((ip)->i_vtbl->iv_bufatoff)((ip), (offset), (res), (bpp))
#define i_ffs1_atime i_din1->di_atime
#define i_ffs1_atimensec i_din1->di_atimensec
#define i_ffs1_blocks i_din1->di_blocks
#define i_ffs1_ctime i_din1->di_ctime
#define i_ffs1_ctimensec i_din1->di_ctimensec
#define i_ffs1_db i_din1->di_db
#define i_ffs1_flags i_din1->di_flags
#define i_ffs1_gen i_din1->di_gen
#define i_ffs1_gid i_din1->di_gid
#define i_ffs1_ib i_din1->di_ib
#define i_ffs1_mode i_din1->di_mode
#define i_ffs1_mtime i_din1->di_mtime
#define i_ffs1_mtimensec i_din1->di_mtimensec
#define i_ffs1_nlink i_din1->di_nlink
#define i_ffs1_rdev i_din1->di_rdev
#define i_ffs1_shortlink i_din1->di_shortlink
#define i_ffs1_size i_din1->di_size
#define i_ffs1_uid i_din1->di_uid
#define i_ffs2_atime i_din2->di_atime
#define i_ffs2_atimensec i_din2->di_atimensec
#define i_ffs2_blocks i_din2->di_blocks
#define i_ffs2_blksize i_din2->di_blksize
#define i_ffs2_ctime i_din2->di_ctime
#define i_ffs2_ctimensec i_din2->di_ctimensec
#define i_ffs2_db i_din2->di_db
#define i_ffs2_flags i_din2->di_flags
#define i_ffs2_gen i_din2->di_gen
#define i_ffs2_gid i_din2->di_gid
#define i_ffs2_ib i_din2->di_ib
#define i_ffs2_mode i_din2->di_mode
#define i_ffs2_mtime i_din2->di_mtime
#define i_ffs2_mtimensec i_din2->di_mtimensec
#define i_ffs2_nlink i_din2->di_nlink
#define i_ffs2_rdev i_din2->di_rdev
#define i_ffs2_size i_din2->di_size
#define i_ffs2_uid i_din2->di_uid
#ifndef _KERNEL
/*
* These are here purely for backwards compatibility for userland.
* They allow direct references to FFS structures using the old names.
*/
#define i_atime i_din1->di_atime
#define i_atimensec i_din1->di_atimensec
#define i_blocks i_din1->di_blocks
#define i_ctime i_din1->di_ctime
#define i_ctimensec i_din1->di_ctimensec
#define i_db i_din1->di_db
#define i_flags i_din1->di_flags
#define i_gen i_din1->di_gen
#define i_gid i_din1->di_gid
#define i_ib i_din1->di_ib
#define i_mode i_din1->di_mode
#define i_mtime i_din1->di_mtime
#define i_mtimensec i_din1->di_mtimensec
#define i_nlink i_din1->di_nlink
#define i_rdev i_din1->di_rdev
#define i_shortlink i_din1->di_shortlink
#define i_size i_din1->di_size
#define i_uid i_din1->di_uid
#endif /* _KERNEL */
#define i_e2fs_mode i_e2din->e2di_mode
#define i_e2fs_size i_e2din->e2di_size
#define i_e2fs_atime i_e2din->e2di_atime
#define i_e2fs_ctime i_e2din->e2di_ctime
#define i_e2fs_mtime i_e2din->e2di_mtime
#define i_e2fs_dtime i_e2din->e2di_dtime
#define i_e2fs_nlink i_e2din->e2di_nlink
#define i_e2fs_nblock i_e2din->e2di_nblock
#define i_e2fs_flags i_e2din->e2di_flags
#define i_e2fs_blocks i_e2din->e2di_blocks
#define i_e2fs_gen i_e2din->e2di_gen
#define i_e2fs_facl i_e2din->e2di_facl
#define i_e2fs_dacl i_e2din->e2di_dacl
#define i_e2fs_faddr i_e2din->e2di_faddr
#define i_e2fs_nfrag i_e2din->e2di_nfrag
#define i_e2fs_fsize i_e2din->e2di_fsize
#define i_e2fs_uid_low i_e2din->e2di_uid_low
#define i_e2fs_gid_low i_e2din->e2di_gid_low
#define i_e2fs_uid_high i_e2din->e2di_uid_high
#define i_e2fs_gid_high i_e2din->e2di_gid_high
/* 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_UPDATE 0x0004 /* Modification time update request */
#define IN_MODIFIED 0x0008 /* Inode has been modified. */
#define IN_RENAME 0x0010 /* Inode is being renamed. */
#define IN_SHLOCK 0x0020 /* File has shared lock. */
#define IN_EXLOCK 0x0040 /* File has exclusive lock. */
#define i_devvp i_ump->um_devvp
#ifdef _KERNEL
/*
* The DIP macros are used to access fields in the dinode.
*/
#define DIP(ip, field) \
(((ip)->i_ump->um_fstype == UM_UFS1) ? \
(ip)->i_ffs1_##field : (ip)->i_ffs2_##field)
#define DIP_ASSIGN(ip, field, value) \
do { \
if ((ip)->i_ump->um_fstype == UM_UFS1) \
(ip)->i_ffs1_##field = (value); \
else \
(ip)->i_ffs2_##field = (value); \
} while (0)
#define DIP_ADD(ip, field, value) \
do { \
if ((ip)->i_ump->um_fstype == UM_UFS1) \
(ip)->i_ffs1_##field += (value); \
else \
(ip)->i_ffs2_##field += (value); \
} while (0)
#define SHORTLINK(ip) \
(((ip)->i_ump->um_fstype == UM_UFS1) ? \
(caddr_t)(ip)->i_ffs1_db : (caddr_t)(ip)->i_ffs2_db)
/*
* 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)
#define FFS_ITIMES(ip, t1, t2) { \
if ((ip)->i_flag & (IN_ACCESS | IN_CHANGE | IN_UPDATE)) { \
(ip)->i_flag |= IN_MODIFIED; \
if ((ip)->i_flag & IN_ACCESS) \
DIP_ASSIGN((ip), atime, (t1)->tv_sec); \
if ((ip)->i_flag & IN_UPDATE) { \
DIP_ASSIGN((ip), mtime, (t2)->tv_sec); \
(ip)->i_modrev++; \
} \
if ((ip)->i_flag & IN_CHANGE) \
DIP_ASSIGN((ip), ctime, time_second); \
(ip)->i_flag &= ~(IN_ACCESS | IN_CHANGE | IN_UPDATE); \
} \
}
#define EXT2FS_ITIMES(ip, t1, t2) { \
if ((ip)->i_flag & (IN_ACCESS | IN_CHANGE | IN_UPDATE)) { \
(ip)->i_flag |= IN_MODIFIED; \
if ((ip)->i_flag & IN_ACCESS) \
(ip)->i_e2fs_atime = (t1)->tv_sec; \
if ((ip)->i_flag & IN_UPDATE) { \
(ip)->i_e2fs_mtime = (t2)->tv_sec; \
(ip)->i_modrev++; \
} \
if ((ip)->i_flag & IN_CHANGE) \
(ip)->i_e2fs_ctime = time_second; \
(ip)->i_flag &= ~(IN_ACCESS | IN_CHANGE | IN_UPDATE); \
} \
}
#define ITIMES(ip, t1, t2) { \
if (IS_EXT2_VNODE((ip)->i_vnode)) { \
EXT2FS_ITIMES(ip, t1, t2); \
} else { \
FFS_ITIMES(ip, t1, t2); \
} \
}
/* Determine if soft dependencies are being done */
#ifdef FFS_SOFTUPDATES
#define DOINGSOFTDEP(vp) ((vp)->v_mount->mnt_flag & MNT_SOFTDEP)
#else
#define DOINGSOFTDEP(vp) (0)
#endif
#define DOINGASYNC(vp) ((vp)->v_mount->mnt_flag & MNT_ASYNC)
/* This overlays the fid structure (see mount.h). */
struct ufid {
u_int16_t ufid_len; /* Length of structure. */
u_int16_t ufid_pad; /* Force 32-bit alignment. */
ino_t ufid_ino; /* File number (ino). */
int32_t ufid_gen; /* Generation number. */
};
#endif /* _KERNEL */