[unix-history] / usr / src / sys / miscfs / specfs / specdev.h

/*
 * Copyright (c) 1990 The Regents of the University of California.
 * All rights reserved.
 *
 * %sccs.include.redist.c%
 *
 *	@(#)specdev.h	7.3 (Berkeley) %G%
 */

/*
 * 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.
 */
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
88859601 KM	1	/*
	2	* Copyright (c) 1990 The Regents of the University of California.
	3	* All rights reserved.
	4	*
6dc0e27a	5	* %sccs.include.redist.c%
88859601	6	*
184ba363	7	* @(#)specdev.h 7.3 (Berkeley) %G%
88859601 KM	8	*/
	9
	10	/*
	11	* This structure defines the information maintained about
	12	* special devices. It is allocated in checkalias and freed
	13	* in vgone.
	14	*/
	15	struct specinfo {
	16	struct vnode **si_hashchain;
	17	struct vnode *si_specnext;
	18	long si_flags;
	19	dev_t si_rdev;
	20	};
	21	/*
	22	* Exported shorthand
	23	*/
	24	#define v_rdev v_specinfo->si_rdev
	25	#define v_hashchain v_specinfo->si_hashchain
	26	#define v_specnext v_specinfo->si_specnext
	27	#define v_specflags v_specinfo->si_flags
	28
	29	/*
	30	* Flags for specinfo
	31	*/
	32	#define SI_MOUNTEDON 0x0001 /* block special device is mounted on */
	33
	34	/*
	35	* Special device management
	36	*/
	37	#define SPECHSZ 64
	38	#if ((SPECHSZ&(SPECHSZ-1)) == 0)
	39	#define SPECHASH(rdev) (((rdev>>5)+(rdev))&(SPECHSZ-1))
	40	#else
	41	#define SPECHASH(rdev) (((unsigned)((rdev>>5)+(rdev)))%SPECHSZ)
	42	#endif
	43
	44	struct vnode *speclisth[SPECHSZ];
184ba363 KM	45
	46	/*
	47	* Prototypes for special file operations on vnodes.
	48	*/
	49	int spec_badop(),
	50	spec_ebadf();
	51
	52	int spec_lookup __P((
	53	struct vnode *vp,
	54	struct nameidata *ndp,
	55	struct proc *p));
	56	#define spec_create ((int (*) __P(( \
	57	struct nameidata *ndp, \
	58	struct vattr *vap, \
	59	struct proc *p))) spec_badop)
	60	#define spec_mknod ((int (*) __P(( \
	61	struct nameidata *ndp, \
	62	struct vattr *vap, \
	63	struct ucred *cred, \
	64	struct proc *p))) spec_badop)
	65	int spec_open __P((
	66	struct vnode *vp,
	67	int mode,
	68	struct ucred *cred,
	69	struct proc *p));
	70	int spec_close __P((
	71	struct vnode *vp,
	72	int fflag,
	73	struct ucred *cred,
	74	struct proc *p));
	75	#define spec_access ((int (*) __P(( \
	76	struct vnode *vp, \
	77	int mode, \
	78	struct ucred *cred, \
	79	struct proc *p))) spec_ebadf)
	80	#define spec_getattr ((int (*) __P(( \
	81	struct vnode *vp, \
	82	struct vattr *vap, \
	83	struct ucred *cred, \
	84	struct proc *p))) spec_ebadf)
	85	#define spec_setattr ((int (*) __P(( \
	86	struct vnode *vp, \
	87	struct vattr *vap, \
	88	struct ucred *cred, \
	89	struct proc *p))) spec_ebadf)
	90	int spec_read __P((
	91	struct vnode *vp,
	92	struct uio *uio,
	93	int ioflag,
	94	struct ucred *cred));
	95	int spec_write __P((
	96	struct vnode *vp,
	97	struct uio *uio,
	98	int ioflag,
	99	struct ucred *cred));
	100	int spec_ioctl __P((
	101	struct vnode *vp,
	102	int command,
	103	caddr_t data,
	104	int fflag,
	105	struct ucred *cred,
	106	struct proc *p));
	107	int spec_select __P((
	108	struct vnode *vp,
109	int which,
110	int fflags,
111	struct ucred *cred,
112	struct proc *p));
113	#define spec_mmap ((int (*) __P(( \
114	struct vnode *vp, \
115	int fflags, \
116	struct ucred *cred, \
117	struct proc *p))) spec_badop)
118	#define spec_fsync ((int (*) __P(( \
119	struct vnode *vp, \
120	int fflags, \
121	struct ucred *cred, \
122	int waitfor, \
123	struct proc *p))) nullop)
124	#define spec_seek ((int (*) __P(( \
125	struct vnode *vp, \
126	off_t oldoff, \
127	off_t newoff, \
128	struct ucred *cred))) spec_badop)
129	#define spec_remove ((int (*) __P(( \
130	struct nameidata *ndp, \
131	struct proc *p))) spec_badop)
132	#define spec_link ((int (*) __P(( \
133	struct vnode *vp, \
134	struct nameidata *ndp, \
135	struct proc *p))) spec_badop)
136	#define spec_rename ((int (*) __P(( \
137	struct nameidata *fndp, \
138	struct nameidata *tdnp, \
139	struct proc *p))) spec_badop)
140	#define spec_mkdir ((int (*) __P(( \
141	struct nameidata *ndp, \
142	struct vattr *vap, \
143	struct proc *p))) spec_badop)
144	#define spec_rmdir ((int (*) __P(( \
145	struct nameidata *ndp, \
146	struct proc *p))) spec_badop)
147	#define spec_symlink ((int (*) __P(( \
148	struct nameidata *ndp, \
149	struct vattr *vap, \
150	char *target, \
151	struct proc *p))) spec_badop)
152	#define spec_readdir ((int (*) __P(( \
153	struct vnode *vp, \
154	struct uio *uio, \
155	struct ucred *cred, \
156	int *eofflagp))) spec_badop)
157	#define spec_readlink ((int (*) __P(( \
158	struct vnode *vp, \
159	struct uio *uio, \
160	struct ucred *cred))) spec_badop)
161	#define spec_abortop ((int (*) __P(( \
162	struct nameidata *ndp))) spec_badop)
163	#define spec_inactive ((int (*) __P(( \
164	struct vnode *vp, \
165	struct proc *p))) nullop)
166	#define spec_reclaim ((int (*) __P(( \
167	struct vnode *vp))) nullop)
168	int spec_lock __P((
169	struct vnode *vp));
170	int spec_unlock __P((
171	struct vnode *vp));
172	int spec_bmap __P((
173	struct vnode *vp,
174	daddr_t bn,
175	struct vnode **vpp,
176	daddr_t *bnp));
177	int spec_strategy __P((
178	struct buf *bp));
179	int spec_print __P((
180	struct vnode *vp));
181	#define spec_islocked ((int (*) __P(( \
182	struct vnode *vp))) nullop)
183	int spec_advlock __P((
184	struct vnode *vp,
185	caddr_t id,
186	int op,
187	struct flock *fl,
188	int flags));