NetBSD/sys/miscfs/specfs/specdev.h

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1993-03-21 12:45:37 +03:00
/*
* Copyright (c) 1990 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: @(#)specdev.h 7.4 (Berkeley) 4/19/91
* $Id: specdev.h,v 1.5 1993/09/07 15:41:56 ws Exp $
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*/
#ifndef _SYS_SPECDEV_H_
#define _SYS_SPECDEV_H_
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/*
* This structure defines the information maintained about
* special devices. It is allocated in checkalias and freed
* in vgone.
*/
struct specinfo {
struct vnode **si_hashchain;
struct vnode *si_specnext;
long si_flags;
dev_t si_rdev;
};
/*
* Exported shorthand
*/
#define v_rdev v_specinfo->si_rdev
#define v_hashchain v_specinfo->si_hashchain
#define v_specnext v_specinfo->si_specnext
#define v_specflags v_specinfo->si_flags
/*
* Flags for specinfo
*/
#define SI_MOUNTEDON 0x0001 /* block special device is mounted on */
/*
* Special device management
*/
#define SPECHSZ 64
#if ((SPECHSZ&(SPECHSZ-1)) == 0)
#define SPECHASH(rdev) (((rdev>>5)+(rdev))&(SPECHSZ-1))
#else
#define SPECHASH(rdev) (((unsigned)((rdev>>5)+(rdev)))%SPECHSZ)
#endif
struct vnode *speclisth[SPECHSZ];
/*
* Prototypes for special file operations on vnodes.
*/
struct nameidata;
struct ucred;
struct flock;
struct buf;
struct uio;
int spec_badop(),
spec_ebadf();
int spec_lookup __P((
struct vnode *vp,
struct nameidata *ndp,
struct proc *p));
#define spec_create ((int (*) __P(( \
struct nameidata *ndp, \
struct vattr *vap, \
struct proc *p))) spec_badop)
#define spec_mknod ((int (*) __P(( \
struct nameidata *ndp, \
struct vattr *vap, \
struct ucred *cred, \
struct proc *p))) spec_badop)
int spec_open __P((
struct vnode *vp,
int mode,
struct ucred *cred,
struct proc *p));
int spec_close __P((
struct vnode *vp,
int fflag,
struct ucred *cred,
struct proc *p));
#define spec_access ((int (*) __P(( \
struct vnode *vp, \
int mode, \
struct ucred *cred, \
struct proc *p))) spec_ebadf)
#define spec_getattr ((int (*) __P(( \
struct vnode *vp, \
struct vattr *vap, \
struct ucred *cred, \
struct proc *p))) spec_ebadf)
#define spec_setattr ((int (*) __P(( \
struct vnode *vp, \
struct vattr *vap, \
struct ucred *cred, \
struct proc *p))) spec_ebadf)
int spec_read __P((
struct vnode *vp,
struct uio *uio,
int ioflag,
struct ucred *cred));
int spec_write __P((
struct vnode *vp,
struct uio *uio,
int ioflag,
struct ucred *cred));
int spec_ioctl __P((
struct vnode *vp,
int command,
caddr_t data,
int fflag,
struct ucred *cred,
struct proc *p));
int spec_select __P((
struct vnode *vp,
int which,
int fflags,
struct ucred *cred,
struct proc *p));
#define spec_mmap ((int (*) __P(( \
struct vnode *vp, \
int fflags, \
struct ucred *cred, \
struct proc *p))) spec_badop)
#define spec_fsync ((int (*) __P(( \
struct vnode *vp, \
int fflags, \
struct ucred *cred, \
int waitfor, \
struct proc *p))) nullop)
#define spec_seek ((int (*) __P(( \
struct vnode *vp, \
off_t oldoff, \
off_t newoff, \
struct ucred *cred))) spec_badop)
#define spec_remove ((int (*) __P(( \
struct nameidata *ndp, \
struct proc *p))) spec_badop)
#define spec_link ((int (*) __P(( \
struct vnode *vp, \
struct nameidata *ndp, \
struct proc *p))) spec_badop)
#define spec_rename ((int (*) __P(( \
struct nameidata *fndp, \
struct nameidata *tdnp, \
struct proc *p))) spec_badop)
#define spec_mkdir ((int (*) __P(( \
struct nameidata *ndp, \
struct vattr *vap, \
struct proc *p))) spec_badop)
#define spec_rmdir ((int (*) __P(( \
struct nameidata *ndp, \
struct proc *p))) spec_badop)
#define spec_symlink ((int (*) __P(( \
struct nameidata *ndp, \
struct vattr *vap, \
char *target, \
struct proc *p))) spec_badop)
#define spec_readdir ((int (*) __P(( \
struct vnode *vp, \
struct uio *uio, \
struct ucred *cred, \
int *eofflagp, \
u_int *cookies, \
int ncookies))) spec_badop)
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#define spec_readlink ((int (*) __P(( \
struct vnode *vp, \
struct uio *uio, \
struct ucred *cred))) spec_badop)
#define spec_abortop ((int (*) __P(( \
struct nameidata *ndp))) spec_badop)
#define spec_inactive ((int (*) __P(( \
struct vnode *vp, \
struct proc *p))) nullop)
#define spec_reclaim ((int (*) __P(( \
struct vnode *vp))) nullop)
int spec_lock __P((
struct vnode *vp));
int spec_unlock __P((
struct vnode *vp));
int spec_bmap __P((
struct vnode *vp,
daddr_t bn,
struct vnode **vpp,
daddr_t *bnp));
int spec_strategy __P((
struct buf *bp));
void spec_print __P((
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struct vnode *vp));
#define spec_islocked ((int (*) __P(( \
struct vnode *vp))) nullop)
int spec_advlock __P((
struct vnode *vp,
caddr_t id,
int op,
struct flock *fl,
int flags));
#endif /* !_SYS_SPECDEV_H_ */