/* $OpenBSD: specdev.h,v 1.28 2010/09/10 16:34:08 thib Exp $ */ /* $NetBSD: specdev.h,v 1.12 1996/02/13 13:13:01 mycroft Exp $ */ /* * Copyright (c) 1990, 1993 * 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. 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 8.3 (Berkeley) 8/10/94 */ /* * 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; struct mount *si_mountpoint; dev_t si_rdev; struct lockf *si_lockf; daddr64_t si_lastr; union { struct vnode *ci_parent; /* pointer back to parent device */ u_int8_t ci_bitmap[8]; /* bitmap of devices cloned off us */ } si_ci; }; struct cloneinfo { struct vnode *ci_vp; /* cloned vnode */ void *ci_data; /* original vnode's v_data */ }; /* * 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_specmountpoint v_specinfo->si_mountpoint #define v_speclockf v_specinfo->si_lockf #define v_specparent v_specinfo->si_ci.ci_parent #define v_specbitmap v_specinfo->si_ci.ci_bitmap /* * 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 extern struct vnode *speclisth[SPECHSZ]; #ifdef _KERNEL /* * Prototypes for special file operations on vnodes. */ extern int (**spec_vnodeop_p)(void *); struct nameidata; struct componentname; struct ucred; struct flock; struct buf; struct uio; int spec_badop(void *); int spec_getattr(void *); int spec_setattr(void *); int spec_access(void *); int spec_open(void *); int spec_close(void *); int spec_read(void *); int spec_write(void *); int spec_ioctl(void *); int spec_poll(void *); int spec_kqfilter(void *); int spec_fsync(void *); int spec_inactive(void *); int spec_strategy(void *); int spec_print(void *); int spec_pathconf(void *); int spec_advlock(void *); int spec_vnoperate(void *); /* spec_subr.c */ int spec_open_clone(struct vop_open_args *); int spec_close_clone(struct vop_close_args *); #endif /* _KERNEL */