1743d97bd7
- guard against synchronous I/O completion - avoid race conditions - use bgetvp/brelvp to properly maintain the vnode holdcount and clean/dirty buffer lists.
139 lines
5.9 KiB
C
139 lines
5.9 KiB
C
/* $NetBSD: vndvar.h,v 1.3 1997/12/02 13:54:48 pk Exp $ */
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/*-
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* Copyright (c) 1996, 1997 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Jason R. Thorpe.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 1988 University of Utah.
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* Copyright (c) 1990, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* the Systems Programming Group of the University of Utah Computer
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* Science Department.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: Utah $Hdr: fdioctl.h 1.1 90/07/09$
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*
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* @(#)vnioctl.h 8.1 (Berkeley) 6/10/93
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*/
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/*
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* Vnode disk pseudo-geometry information.
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*/
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struct vndgeom {
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u_int32_t vng_secsize; /* # bytes per sector */
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u_int32_t vng_nsectors; /* # data sectors per track */
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u_int32_t vng_ntracks; /* # tracks per cylinder */
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u_int32_t vng_ncylinders; /* # cylinders per unit */
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};
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/*
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* Ioctl definitions for file (vnode) disk pseudo-device.
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*/
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struct vnd_ioctl {
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char *vnd_file; /* pathname of file to mount */
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int vnd_flags; /* flags; see below */
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struct vndgeom vnd_geom; /* geometry to emulate */
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int vnd_size; /* (returned) size of disk */
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};
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/* vnd_flags */
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#define VNDIOF_HASGEOM 0x01 /* use specified geometry */
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struct vnode;
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struct ucred;
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/*
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* A vnode disk's state information.
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*/
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struct vnd_softc {
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int sc_unit; /* logical unit number */
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int sc_flags; /* flags */
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size_t sc_size; /* size of vnd */
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struct vnode *sc_vp; /* vnode */
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struct ucred *sc_cred; /* credentials */
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int sc_maxactive; /* max # of active requests */
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struct buf sc_tab; /* transfer queue */
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char sc_xname[8]; /* XXX external name */
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struct disk sc_dkdev; /* generic disk device info */
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struct vndgeom sc_geom; /* virtual geometry */
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};
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/* sc_flags */
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#define VNF_INITED 0x01 /* unit has been initialized */
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#define VNF_WLABEL 0x02 /* label area is writable */
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#define VNF_LABELLING 0x04 /* unit is currently being labelled */
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#define VNF_WANTED 0x08 /* someone is waiting to obtain a lock */
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#define VNF_LOCKED 0x10 /* unit is locked */
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#define VNF_BUSY 0x20 /* unit is busy */
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/*
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* Before you can use a unit, it must be configured with VNDIOCSET.
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* The configuration persists across opens and closes of the device;
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* an VNDIOCCLR must be used to reset a configuration. An attempt to
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* VNDIOCSET an already active unit will return EBUSY.
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*/
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#define VNDIOCSET _IOWR('F', 0, struct vnd_ioctl) /* enable disk */
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#define VNDIOCCLR _IOW('F', 1, struct vnd_ioctl) /* disable disk */
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