vndvar.h revision 1.11
1/* $NetBSD: vndvar.h,v 1.11 2003/05/17 16:11:52 thorpej Exp $ */ 2 3/*- 4 * Copyright (c) 1996, 1997, 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39/* 40 * Copyright (c) 1988 University of Utah. 41 * Copyright (c) 1990, 1993 42 * The Regents of the University of California. All rights reserved. 43 * 44 * This code is derived from software contributed to Berkeley by 45 * the Systems Programming Group of the University of Utah Computer 46 * Science Department. 47 * 48 * Redistribution and use in source and binary forms, with or without 49 * modification, are permitted provided that the following conditions 50 * are met: 51 * 1. Redistributions of source code must retain the above copyright 52 * notice, this list of conditions and the following disclaimer. 53 * 2. Redistributions in binary form must reproduce the above copyright 54 * notice, this list of conditions and the following disclaimer in the 55 * documentation and/or other materials provided with the distribution. 56 * 3. All advertising materials mentioning features or use of this software 57 * must display the following acknowledgement: 58 * This product includes software developed by the University of 59 * California, Berkeley and its contributors. 60 * 4. Neither the name of the University nor the names of its contributors 61 * may be used to endorse or promote products derived from this software 62 * without specific prior written permission. 63 * 64 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 65 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 66 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 67 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 68 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 69 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 70 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 71 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 72 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 73 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 74 * SUCH DAMAGE. 75 * 76 * from: Utah $Hdr: fdioctl.h 1.1 90/07/09$ 77 * 78 * @(#)vnioctl.h 8.1 (Berkeley) 6/10/93 79 */ 80 81#include <sys/pool.h> 82 83/* 84 * Vnode disk pseudo-geometry information. 85 */ 86struct vndgeom { 87 u_int32_t vng_secsize; /* # bytes per sector */ 88 u_int32_t vng_nsectors; /* # data sectors per track */ 89 u_int32_t vng_ntracks; /* # tracks per cylinder */ 90 u_int32_t vng_ncylinders; /* # cylinders per unit */ 91}; 92 93/* 94 * Ioctl definitions for file (vnode) disk pseudo-device. 95 */ 96struct vnd_ioctl { 97 char *vnd_file; /* pathname of file to mount */ 98 int vnd_flags; /* flags; see below */ 99 struct vndgeom vnd_geom; /* geometry to emulate */ 100 int vnd_size; /* (returned) size of disk */ 101}; 102 103/* vnd_flags */ 104#define VNDIOF_HASGEOM 0x01 /* use specified geometry */ 105#define VNDIOF_READONLY 0x02 /* as read-only device */ 106#define VNDIOF_FORCE 0x04 /* force close */ 107 108#ifdef _KERNEL 109 110struct vnode; 111struct ucred; 112 113/* 114 * A vnode disk's state information. 115 */ 116struct vnd_softc { 117 int sc_unit; /* logical unit number */ 118 int sc_flags; /* flags */ 119 size_t sc_size; /* size of vnd */ 120 struct vnode *sc_vp; /* vnode */ 121 struct ucred *sc_cred; /* credentials */ 122 int sc_maxactive; /* max # of active requests */ 123 struct bufq_state sc_tab; /* transfer queue */ 124 int sc_active; /* number of active transfers */ 125 char sc_xname[8]; /* XXX external name */ 126 struct disk sc_dkdev; /* generic disk device info */ 127 struct vndgeom sc_geom; /* virtual geometry */ 128 struct pool sc_vxpool; /* vndxfer pool */ 129 struct pool sc_vbpool; /* vndbuf pool */ 130}; 131#endif 132 133/* sc_flags */ 134#define VNF_INITED 0x001 /* unit has been initialized */ 135#define VNF_WLABEL 0x002 /* label area is writable */ 136#define VNF_LABELLING 0x004 /* unit is currently being labelled */ 137#define VNF_WANTED 0x008 /* someone is waiting to obtain a lock */ 138#define VNF_LOCKED 0x010 /* unit is locked */ 139#define VNF_BUSY 0x020 /* unit is busy */ 140#define VNF_READONLY 0x040 /* unit is read-only */ 141#define VNF_KLABEL 0x080 /* keep label on close */ 142#define VNF_VLABEL 0x100 /* label is valid */ 143 144/* 145 * A simple structure for describing which vnd units are in use. 146 */ 147struct vnd_user { 148 int vnu_unit; /* which vnd unit */ 149 dev_t vnu_dev; /* file is on this device... */ 150 ino_t vnu_ino; /* ...at this inode */ 151}; 152 153/* 154 * Before you can use a unit, it must be configured with VNDIOCSET. 155 * The configuration persists across opens and closes of the device; 156 * an VNDIOCCLR must be used to reset a configuration. An attempt to 157 * VNDIOCSET an already active unit will return EBUSY. 158 */ 159#define VNDIOCSET _IOWR('F', 0, struct vnd_ioctl) /* enable disk */ 160#define VNDIOCCLR _IOW('F', 1, struct vnd_ioctl) /* disable disk */ 161#define VNDIOCGET _IOWR('F', 2, struct vnd_user) /* get list */ 162