851e916f1b
by which files (hmm...why can't I unmount that file system over there). Currently this is just the device and inode number of the file backing the vnd, but hopefully consing up full pathnames can be done at some point.
157 lines
6.4 KiB
C
157 lines
6.4 KiB
C
/* $NetBSD: vndvar.h,v 1.7 2002/06/21 19:09:31 atatat Exp $ */
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/*-
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* Copyright (c) 1996, 1997, 1998 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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#include <sys/pool.h>
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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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#ifdef _KERNEL
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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_queue sc_tab; /* transfer queue */
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int sc_active; /* number of active transfers */
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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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struct pool sc_vxpool; /* vndxfer pool */
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struct pool sc_vbpool; /* vndbuf pool */
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};
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#endif
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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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* A simple structure for describing which vnd units are in use.
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*/
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struct vnd_user {
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int vnu_unit; /* which vnd unit */
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dev_t vnu_dev; /* file is on this device... */
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ino_t vnu_ino; /* ...at this inode */
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};
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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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#define VNDIOCGET _IOWR('F', 2, struct vnd_user) /* get list */
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