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freebsd-dev/sys/i386/boot/dosboot/inode.h
Poul-Henning Kamp a0502b19d4 Add two new functions, get{micro|nano}time. 
They are atomic, but return in essence what is in the "time" variable.
gettime() is now a macro front for getmicrotime().

Various patches to use the two new functions instead of the various
hacks used in their absence.

Some puntuation and grammer patches from Bruce.

A couple of XXX comments.
1998-03-26 20:54:05 +00:00

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/*
* Copyright (c) 1982, 1989 The Regents of the University of California.
* All rights reserved.
*
* 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.
*
* from: @(#)inode.h 7.17 (Berkeley) 5/8/91
* $Id: inode.h,v 1.4 1997/02/22 09:30:56 peter Exp $
*/
#ifndef _UFS_INODE_H_
#define _UFS_INODE_H_ 1
#ifdef KERNEL
include "../ufs/dinode.h"
#else
#include "dinode.h"
#endif
/*
* 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
* permannent 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_chain[2]; /* hash chain, MUST be first */
struct vnode *i_vnode; /* vnode associated with this inode */
struct vnode *i_devvp; /* vnode for block I/O */
u_long i_flag; /* see below */
dev_t i_dev; /* device where inode resides */
ino_t i_number; /* the identity of the inode */
struct fs *i_fs; /* filesystem associated with this inode */
struct dquot *i_dquot[MAXQUOTAS]; /* pointer to dquot structures */
struct lockf *i_lockf; /* head of byte-level lock list */
long i_diroff; /* offset in dir, where we found last entry */
off_t i_endoff; /* end of useful stuff in directory */
long i_spare0;
long i_spare1;
struct dinode i_din; /* the on-disk dinode */
};
#define FASTLINK(ip) (DFASTLINK((ip)->i_din))
#define i_symlink i_din.di_symlink
#define i_mode i_din.di_mode
#define i_nlink i_din.di_nlink
#define i_uid i_din.di_uid
#define i_gid i_din.di_gid
#if BYTE_ORDER == LITTLE_ENDIAN || defined(tahoe) /* ugh! -- must be fixed */
#define i_size i_din.di_qsize.val[0]
#else /* BYTE_ORDER == BIG_ENDIAN */
#define i_size i_din.di_qsize.val[1]
#endif
#define i_db i_din.di_db
#define i_ib i_din.di_ib
#define i_atime i_din.di_atime
#define i_mtime i_din.di_mtime
#define i_ctime i_din.di_ctime
#define i_blocks i_din.di_blocks
#define i_rdev i_din.di_db[0]
#define i_flags i_din.di_flags
#define i_gen i_din.di_gen
#define i_forw i_chain[0]
#define i_back i_chain[1]
#define i_di_spare i_din.di_spare
/* flags */
#define ILOCKED 0x0001 /* inode is locked */
#define IWANT 0x0002 /* some process waiting on lock */
#define IRENAME 0x0004 /* inode is being renamed */
#define IUPD 0x0010 /* file has been modified */
#define IACC 0x0020 /* inode access time to be updated */
#define ICHG 0x0040 /* inode has been changed */
#define IMOD 0x0080 /* inode has been modified */
#define ISHLOCK 0x0100 /* file has shared lock */
#define IEXLOCK 0x0200 /* file has exclusive lock */
#define ILWAIT 0x0400 /* someone waiting on file lock */
#ifdef KERNEL
/*
* Convert between inode pointers and vnode pointers
*/
#define VTOI(vp) ((struct inode *)(vp)->v_data)
#define ITOV(ip) ((ip)->i_vnode)
/*
* Convert between vnode types and inode formats
*/
extern enum vtype iftovt_tab[];
extern int vttoif_tab[];
#define IFTOVT(mode) (iftovt_tab[((mode) & IFMT) >> 12])
#define VTTOIF(indx) (vttoif_tab[(int)(indx)])
#define MAKEIMODE(indx, mode) (int)(VTTOIF(indx) | (mode))
extern u_long nextgennumber; /* next generation number to assign */
extern ino_t dirpref();
/*
* Lock and unlock inodes.
*/
#ifdef notdef
#define ILOCK(ip) { \
while ((ip)->i_flag & ILOCKED) { \
(ip)->i_flag |= IWANT; \
(void) sleep((caddr_t)(ip), PINOD); \
} \
(ip)->i_flag |= ILOCKED; \
}
#define IUNLOCK(ip) { \
(ip)->i_flag &= ~ILOCKED; \
if ((ip)->i_flag&IWANT) { \
(ip)->i_flag &= ~IWANT; \
wakeup((caddr_t)(ip)); \
} \
}
#else
#define ILOCK(ip) ilock(ip)
#define IUNLOCK(ip) iunlock(ip)
#endif
#define IUPDAT(ip, t1, t2, waitfor) { \
if (ip->i_flag&(IUPD|IACC|ICHG|IMOD)) \
(void) iupdat(ip, t1, t2, waitfor); \
}
/*
* This overlays the fid sturcture (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 */
};
/*
* Prototypes for UFS vnode operations
*/
int ufs_lookup __P((struct vnode *vp, struct nameidata *ndp, struct proc *p));
int ufs_create __P((struct nameidata *ndp, struct vattr *vap, struct proc *p));
int ufs_mknod __P((struct nameidata *ndp, struct vattr *vap, struct ucred *cred,
struct proc *p));
int ufs_open __P((struct vnode *vp, int mode, struct ucred *cred,
struct proc *p));
int ufs_close __P((struct vnode *vp, int fflag, struct ucred *cred,
struct proc *p));
int ufs_access __P((struct vnode *vp, int mode, struct ucred *cred,
struct proc *p));
int ufs_getattr __P((struct vnode *vp, struct vattr *vap, struct ucred *cred,
struct proc *p));
int ufs_setattr __P((struct vnode *vp, struct vattr *vap, struct ucred *cred,
struct proc *p));
int ufs_read __P((struct vnode *vp, struct uio *uio, int ioflag,
struct ucred *cred));
int ufs_write __P((struct vnode *vp, struct uio *uio, int ioflag,
struct ucred *cred));
int ufs_ioctl __P((struct vnode *vp, int command, caddr_t data, int fflag,
struct ucred *cred, struct proc *p));
int ufs_select __P((struct vnode *vp, int which, int fflags, struct ucred *cred,
struct proc *p));
int ufs_mmap __P((struct vnode *vp, int fflags, struct ucred *cred,
struct proc *p));
int ufs_fsync __P((struct vnode *vp, int fflags, struct ucred *cred,
int waitfor, struct proc *p));
int ufs_seek __P((struct vnode *vp, off_t oldoff, off_t newoff,
struct ucred *cred));
int ufs_remove __P((struct nameidata *ndp, struct proc *p));
int ufs_link __P((struct vnode *vp, struct nameidata *ndp, struct proc *p));
int ufs_rename __P((struct nameidata *fndp, struct nameidata *tdnp,
struct proc *p));
int ufs_mkdir __P((struct nameidata *ndp, struct vattr *vap, struct proc *p));
int ufs_rmdir __P((struct nameidata *ndp, struct proc *p));
int ufs_symlink __P((struct nameidata *ndp, struct vattr *vap, char *target,
struct proc *p));
int ufs_readdir __P((struct vnode *vp, struct uio *uio, struct ucred *cred,
int *eofflagp));
int ufs_readlink __P((struct vnode *vp, struct uio *uio, struct ucred *cred));
int ufs_abortop __P((struct nameidata *ndp));
int ufs_inactive __P((struct vnode *vp, struct proc *p));
int ufs_reclaim __P((struct vnode *vp));
int ufs_lock __P((struct vnode *vp));
int ufs_unlock __P((struct vnode *vp));
int ufs_bmap __P((struct vnode *vp, daddr_t bn, struct vnode **vpp,
daddr_t *bnp));
int ufs_strategy __P((struct buf *bp));
void ufs_print __P((struct vnode *vp));
int ufs_islocked __P((struct vnode *vp));
int ufs_advlock __P((struct vnode *vp, caddr_t id, int op, struct flock *fl,
int flags));
extern void blkfree(struct inode *, daddr_t, off_t);
extern void ifree(struct inode *, ino_t, int);
extern void iput(struct inode *);
extern void ilock(struct inode *);
extern void iunlock(struct inode *);
extern void dirbad(struct inode *, off_t, char *);
extern int alloc(struct inode *, daddr_t, daddr_t, int, daddr_t *);
extern int realloccg(struct inode *, off_t, daddr_t, int, int, struct buf **);
extern int ialloc(struct inode *, ino_t, int, struct ucred *, struct inode **);
extern daddr_t blkpref(struct inode *, daddr_t, int, daddr_t *);
extern u_long hashalloc(struct inode *, int, long, int,
u_long (*)(struct inode *, int, long, int));
extern daddr_t fragextend(struct inode *, int, long, int, int);
extern daddr_t alloccg(struct inode *, int, daddr_t, int);
struct cg; /* I really don't want to know why */
struct direct; /* this header is required by NFS... */
extern daddr_t alloccgblk(struct fs *, struct cg *, daddr_t);
extern ino_t ialloccg(struct inode *, int, daddr_t, int);
extern int ufs_lookup(struct vnode *, struct nameidata *, struct proc *);
extern int dirbadentry(struct direct *, int);
extern int direnter(struct inode *, struct nameidata *);
extern int dirremove(struct nameidata *);
extern int dirrewrite(struct inode *, struct inode *, struct nameidata *);
extern int blkatoff(struct inode *, off_t, char **, struct buf **);
extern int dirempty(struct inode *, ino_t, struct ucred *);
extern int checkpath(struct inode *, struct inode *, struct ucred *);
extern void ufs_init(void);
extern int iget(struct inode *, ino_t, struct inode **);
extern int ufs_inactive(struct vnode *, struct proc *);
extern int ufs_reclaim(struct vnode *);
extern int iupdat(struct inode *, struct timeval *, struct timeval *,
int);
extern int itrunc(struct inode *, u_long, int);
extern int indirtrunc(struct inode *, daddr_t, daddr_t, int, long *);
extern int bmap(struct inode *, daddr_t, daddr_t *);
extern int balloc(struct inode *, daddr_t, int, struct buf **, int);
#endif /* KERNEL */
#endif /* _UFS_INODE_H_ */
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