[unix-history] / sys / sys / specdev.h

/*
 * 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
 *	$Id$
 */

/*
 * 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))) spec_badop)
#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));
int	spec_print __P((
		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));
Commit	Line	Data
15637ed4 RG	1	/*
	2	* Copyright (c) 1990 The Regents of the University of California.
	3	* All rights reserved.
	4	*
	5	* Redistribution and use in source and binary forms, with or without
	6	* modification, are permitted provided that the following conditions
	7	* are met:
	8	* 1. Redistributions of source code must retain the above copyright
	9	* notice, this list of conditions and the following disclaimer.
	10	* 2. Redistributions in binary form must reproduce the above copyright
	11	* notice, this list of conditions and the following disclaimer in the
	12	* documentation and/or other materials provided with the distribution.
	13	* 3. All advertising materials mentioning features or use of this software
	14	* must display the following acknowledgement:
	15	* This product includes software developed by the University of
	16	* California, Berkeley and its contributors.
	17	* 4. Neither the name of the University nor the names of its contributors
	18	* may be used to endorse or promote products derived from this software
	19	* without specific prior written permission.
	20	*
	21	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	22	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	23	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	24	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	25	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	26	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	27	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	28	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	29	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	30	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	31	* SUCH DAMAGE.
	32	*
78ed81a3	33	* from: @(#)specdev.h 7.4 (Berkeley) 4/19/91
78ed81a3	34	* $Id$
15637ed4 RG	35	*/
	36
	37	/*
	38	* This structure defines the information maintained about
	39	* special devices. It is allocated in checkalias and freed
	40	* in vgone.
	41	*/
	42	struct specinfo {
	43	struct vnode **si_hashchain;
	44	struct vnode *si_specnext;
	45	long si_flags;
	46	dev_t si_rdev;
	47	};
	48	/*
	49	* Exported shorthand
	50	*/
	51	#define v_rdev v_specinfo->si_rdev
	52	#define v_hashchain v_specinfo->si_hashchain
	53	#define v_specnext v_specinfo->si_specnext
	54	#define v_specflags v_specinfo->si_flags
	55
	56	/*
	57	* Flags for specinfo
	58	*/
	59	#define SI_MOUNTEDON 0x0001 /* block special device is mounted on */
	60
	61	/*
	62	* Special device management
	63	*/
	64	#define SPECHSZ 64
	65	#if ((SPECHSZ&(SPECHSZ-1)) == 0)
	66	#define SPECHASH(rdev) (((rdev>>5)+(rdev))&(SPECHSZ-1))
	67	#else
	68	#define SPECHASH(rdev) (((unsigned)((rdev>>5)+(rdev)))%SPECHSZ)
	69	#endif
	70
	71	struct vnode *speclisth[SPECHSZ];
	72
	73	/*
	74	* Prototypes for special file operations on vnodes.
	75	*/
	76	struct nameidata;
	77	struct ucred;
	78	struct flock;
	79	struct buf;
	80	struct uio;
	81
	82	int spec_badop(),
	83	spec_ebadf();
	84
	85	int spec_lookup __P((
	86	struct vnode *vp,
	87	struct nameidata *ndp,
	88	struct proc *p));
	89	#define spec_create ((int (*) __P(( \
	90	struct nameidata *ndp, \
	91	struct vattr *vap, \
	92	struct proc *p))) spec_badop)
	93	#define spec_mknod ((int (*) __P(( \
	94	struct nameidata *ndp, \
	95	struct vattr *vap, \
	96	struct ucred *cred, \
	97	struct proc *p))) spec_badop)
	98	int spec_open __P((
99	struct vnode *vp,
100	int mode,
101	struct ucred *cred,
102	struct proc *p));
103	int spec_close __P((
104	struct vnode *vp,
105	int fflag,
106	struct ucred *cred,
107	struct proc *p));
108	#define spec_access ((int (*) __P(( \
109	struct vnode *vp, \
110	int mode, \
111	struct ucred *cred, \
112	struct proc *p))) spec_ebadf)
113	#define spec_getattr ((int (*) __P(( \
114	struct vnode *vp, \
115	struct vattr *vap, \
116	struct ucred *cred, \
117	struct proc *p))) spec_ebadf)
118	#define spec_setattr ((int (*) __P(( \
119	struct vnode *vp, \
120	struct vattr *vap, \
121	struct ucred *cred, \
122	struct proc *p))) spec_ebadf)
123	int spec_read __P((
124	struct vnode *vp,
125	struct uio *uio,
126	int ioflag,
127	struct ucred *cred));
128	int spec_write __P((
129	struct vnode *vp,
130	struct uio *uio,
131	int ioflag,
132	struct ucred *cred));
133	int spec_ioctl __P((
134	struct vnode *vp,
135	int command,
136	caddr_t data,
137	int fflag,
138	struct ucred *cred,
139	struct proc *p));
140	int spec_select __P((
141	struct vnode *vp,
142	int which,
143	int fflags,
144	struct ucred *cred,
145	struct proc *p));
146	#define spec_mmap ((int (*) __P(( \
147	struct vnode *vp, \
148	int fflags, \
149	struct ucred *cred, \
150	struct proc *p))) spec_badop)
151	#define spec_fsync ((int (*) __P(( \
152	struct vnode *vp, \
153	int fflags, \
154	struct ucred *cred, \
155	int waitfor, \
156	struct proc *p))) nullop)
157	#define spec_seek ((int (*) __P(( \
158	struct vnode *vp, \
159	off_t oldoff, \
160	off_t newoff, \
161	struct ucred *cred))) spec_badop)
162	#define spec_remove ((int (*) __P(( \
163	struct nameidata *ndp, \
164	struct proc *p))) spec_badop)
165	#define spec_link ((int (*) __P(( \
166	struct vnode *vp, \
167	struct nameidata *ndp, \
168	struct proc *p))) spec_badop)
169	#define spec_rename ((int (*) __P(( \
170	struct nameidata *fndp, \
171	struct nameidata *tdnp, \
172	struct proc *p))) spec_badop)
173	#define spec_mkdir ((int (*) __P(( \
174	struct nameidata *ndp, \
175	struct vattr *vap, \
176	struct proc *p))) spec_badop)
177	#define spec_rmdir ((int (*) __P(( \
178	struct nameidata *ndp, \
179	struct proc *p))) spec_badop)
180	#define spec_symlink ((int (*) __P(( \
181	struct nameidata *ndp, \
182	struct vattr *vap, \
183	char *target, \
184	struct proc *p))) spec_badop)
185	#define spec_readdir ((int (*) __P(( \
186	struct vnode *vp, \
187	struct uio *uio, \
188	struct ucred *cred, \
189	int *eofflagp))) spec_badop)
190	#define spec_readlink ((int (*) __P(( \
191	struct vnode *vp, \
192	struct uio *uio, \
193	struct ucred *cred))) spec_badop)
194	#define spec_abortop ((int (*) __P(( \
195	struct nameidata *ndp))) spec_badop)
196	#define spec_inactive ((int (*) __P(( \
197	struct vnode *vp, \
198	struct proc *p))) nullop)
199	#define spec_reclaim ((int (*) __P(( \
200	struct vnode *vp))) nullop)
201	int spec_lock __P((
202	struct vnode *vp));
203	int spec_unlock __P((
204	struct vnode *vp));
205	int spec_bmap __P((
206	struct vnode *vp,
207	daddr_t bn,
208	struct vnode **vpp,
209	daddr_t *bnp));
210	int spec_strategy __P((
211	struct buf *bp));
212	int spec_print __P((
213	struct vnode *vp));
214	#define spec_islocked ((int (*) __P(( \
215	struct vnode *vp))) nullop)
216	int spec_advlock __P((
217	struct vnode *vp,
218	caddr_t id,
219	int op,
220	struct flock *fl,
221	int flags));