[unix-history] / usr / src / sys.386bsd / 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.
 *
 *	@(#)specdev.h	7.4 (Berkeley) 4/19/91
 */

/*
 * 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
b688fc87 WJ	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	*
	33	* @(#)specdev.h 7.4 (Berkeley) 4/19/91
	34	*/
	35
	36	/*
	37	* This structure defines the information maintained about
	38	* special devices. It is allocated in checkalias and freed
	39	* in vgone.
	40	*/
	41	struct specinfo {
	42	struct vnode **si_hashchain;
	43	struct vnode *si_specnext;
	44	long si_flags;
	45	dev_t si_rdev;
	46	};
	47	/*
	48	* Exported shorthand
	49	*/
	50	#define v_rdev v_specinfo->si_rdev
	51	#define v_hashchain v_specinfo->si_hashchain
	52	#define v_specnext v_specinfo->si_specnext
	53	#define v_specflags v_specinfo->si_flags
	54
	55	/*
	56	* Flags for specinfo
	57	*/
	58	#define SI_MOUNTEDON 0x0001 /* block special device is mounted on */
	59
	60	/*
	61	* Special device management
	62	*/
	63	#define SPECHSZ 64
	64	#if ((SPECHSZ&(SPECHSZ-1)) == 0)
65	#define SPECHASH(rdev) (((rdev>>5)+(rdev))&(SPECHSZ-1))
66	#else
67	#define SPECHASH(rdev) (((unsigned)((rdev>>5)+(rdev)))%SPECHSZ)
68	#endif
69
70	struct vnode *speclisth[SPECHSZ];
71
72	/*
73	* Prototypes for special file operations on vnodes.
74	*/
75	struct nameidata;
76	struct ucred;
77	struct flock;
78	struct buf;
79	struct uio;
80
81	int spec_badop(),
82	spec_ebadf();
83
84	int spec_lookup __P((
85	struct vnode *vp,
86	struct nameidata *ndp,
87	struct proc *p));
88	#define spec_create ((int (*) __P(( \
89	struct nameidata *ndp, \
90	struct vattr *vap, \
91	struct proc *p))) spec_badop)
92	#define spec_mknod ((int (*) __P(( \
93	struct nameidata *ndp, \
94	struct vattr *vap, \
95	struct ucred *cred, \
96	struct proc *p))) spec_badop)
97	int spec_open __P((
98	struct vnode *vp,
99	int mode,
100	struct ucred *cred,
101	struct proc *p));
102	int spec_close __P((
103	struct vnode *vp,
104	int fflag,
105	struct ucred *cred,
106	struct proc *p));
107	#define spec_access ((int (*) __P(( \
108	struct vnode *vp, \
109	int mode, \
110	struct ucred *cred, \
111	struct proc *p))) spec_ebadf)
112	#define spec_getattr ((int (*) __P(( \
113	struct vnode *vp, \
114	struct vattr *vap, \
115	struct ucred *cred, \
116	struct proc *p))) spec_ebadf)
117	#define spec_setattr ((int (*) __P(( \
118	struct vnode *vp, \
119	struct vattr *vap, \
120	struct ucred *cred, \
121	struct proc *p))) spec_ebadf)
122	int spec_read __P((
123	struct vnode *vp,
124	struct uio *uio,
125	int ioflag,
126	struct ucred *cred));
127	int spec_write __P((
128	struct vnode *vp,
129	struct uio *uio,
130	int ioflag,
131	struct ucred *cred));
132	int spec_ioctl __P((
133	struct vnode *vp,
134	int command,
135	caddr_t data,
136	int fflag,
137	struct ucred *cred,
138	struct proc *p));
139	int spec_select __P((
140	struct vnode *vp,
141	int which,
142	int fflags,
143	struct ucred *cred,
144	struct proc *p));
145	#define spec_mmap ((int (*) __P(( \
146	struct vnode *vp, \
147	int fflags, \
148	struct ucred *cred, \
149	struct proc *p))) spec_badop)
150	#define spec_fsync ((int (*) __P(( \
151	struct vnode *vp, \
152	int fflags, \
153	struct ucred *cred, \
154	int waitfor, \
155	struct proc *p))) nullop)
156	#define spec_seek ((int (*) __P(( \
157	struct vnode *vp, \
158	off_t oldoff, \
159	off_t newoff, \
160	struct ucred *cred))) spec_badop)
161	#define spec_remove ((int (*) __P(( \
162	struct nameidata *ndp, \
163	struct proc *p))) spec_badop)
164	#define spec_link ((int (*) __P(( \
165	struct vnode *vp, \
166	struct nameidata *ndp, \
167	struct proc *p))) spec_badop)
168	#define spec_rename ((int (*) __P(( \
169	struct nameidata *fndp, \
170	struct nameidata *tdnp, \
171	struct proc *p))) spec_badop)
172	#define spec_mkdir ((int (*) __P(( \
173	struct nameidata *ndp, \
174	struct vattr *vap, \
175	struct proc *p))) spec_badop)
176	#define spec_rmdir ((int (*) __P(( \
177	struct nameidata *ndp, \
178	struct proc *p))) spec_badop)
179	#define spec_symlink ((int (*) __P(( \
180	struct nameidata *ndp, \
181	struct vattr *vap, \
182	char *target, \
183	struct proc *p))) spec_badop)
184	#define spec_readdir ((int (*) __P(( \
185	struct vnode *vp, \
186	struct uio *uio, \
187	struct ucred *cred, \
188	int *eofflagp))) spec_badop)
189	#define spec_readlink ((int (*) __P(( \
190	struct vnode *vp, \
191	struct uio *uio, \
192	struct ucred *cred))) spec_badop)
193	#define spec_abortop ((int (*) __P(( \
194	struct nameidata *ndp))) spec_badop)
195	#define spec_inactive ((int (*) __P(( \
196	struct vnode *vp, \
197	struct proc *p))) nullop)
198	#define spec_reclaim ((int (*) __P(( \
199	struct vnode *vp))) nullop)
200	int spec_lock __P((
201	struct vnode *vp));
202	int spec_unlock __P((
203	struct vnode *vp));
204	int spec_bmap __P((
205	struct vnode *vp,
206	daddr_t bn,
207	struct vnode **vpp,
208	daddr_t *bnp));
209	int spec_strategy __P((
210	struct buf *bp));
211	int spec_print __P((
212	struct vnode *vp));
213	#define spec_islocked ((int (*) __P(( \
214	struct vnode *vp))) nullop)
215	int spec_advlock __P((
216	struct vnode *vp,
217	caddr_t id,
218	int op,
219	struct flock *fl,
220	int flags));