1 /* $NetBSD: vndvar.h,v 1.33 2013/06/03 16:42:32 christos 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Copyright (c) 1988 University of Utah. 34 * Copyright (c) 1990, 1993 35 * The Regents of the University of California. All rights reserved. 36 * 37 * This code is derived from software contributed to Berkeley by 38 * the Systems Programming Group of the University of Utah Computer 39 * Science Department. 40 * 41 * Redistribution and use in source and binary forms, with or without 42 * modification, are permitted provided that the following conditions 43 * are met: 44 * 1. Redistributions of source code must retain the above copyright 45 * notice, this list of conditions and the following disclaimer. 46 * 2. Redistributions in binary form must reproduce the above copyright 47 * notice, this list of conditions and the following disclaimer in the 48 * documentation and/or other materials provided with the distribution. 49 * 3. Neither the name of the University nor the names of its contributors 50 * may be used to endorse or promote products derived from this software 51 * without specific prior written permission. 52 * 53 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 54 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 55 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 56 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 57 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 58 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 59 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 60 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 61 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 62 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 63 * SUCH DAMAGE. 64 * 65 * from: Utah $Hdr: fdioctl.h 1.1 90/07/09$ 66 * 67 * @(#)vnioctl.h 8.1 (Berkeley) 6/10/93 68 */ 69 70 #ifndef _SYS_DEV_VNDVAR_H_ 71 #define _SYS_DEV_VNDVAR_H_ 72 73 #if !defined(__minix) 74 #include <sys/pool.h> 75 #endif /* defined(__minix) */ 76 77 /* 78 * Vnode disk pseudo-geometry information. 79 */ 80 struct vndgeom { 81 u_int32_t vng_secsize; /* # bytes per sector */ 82 u_int32_t vng_nsectors; /* # data sectors per track */ 83 u_int32_t vng_ntracks; /* # tracks per cylinder */ 84 u_int32_t vng_ncylinders; /* # cylinders per unit */ 85 }; 86 87 /* 88 * Ioctl definitions for file (vnode) disk pseudo-device. 89 */ 90 struct vnd_ioctl { 91 #if !defined(__minix) 92 char *vnd_file; /* pathname of file to mount */ 93 #else 94 int vnd_fildes; /* file descriptor of file to mount */ 95 #endif /* !defined(__minix)*/ 96 int vnd_flags; /* flags; see below */ 97 struct vndgeom vnd_geom; /* geometry to emulate */ 98 #if !defined(__minix) 99 unsigned int vnd_osize; /* (returned) size of disk */ 100 #endif /* !defined(__minix)*/ 101 uint64_t vnd_size; /* (returned) size of disk */ 102 }; 103 104 /* vnd_flags */ 105 #define VNDIOF_HASGEOM 0x01 /* use specified geometry */ 106 #define VNDIOF_READONLY 0x02 /* as read-only device */ 107 #define VNDIOF_FORCE 0x04 /* force close */ 108 109 #if !defined(__minix) 110 #ifdef _KERNEL 111 112 struct vnode; 113 114 /* 115 * A vnode disk's state information. 116 */ 117 struct vnd_softc { 118 device_t sc_dev; 119 int sc_flags; /* flags */ 120 uint64_t sc_size; /* size of vnd */ 121 struct vnode *sc_vp; /* vnode */ 122 kauth_cred_t sc_cred; /* credentials */ 123 int sc_maxactive; /* max # of active requests */ 124 struct bufq_state *sc_tab; /* transfer queue */ 125 int sc_pending; /* number of pending transfers */ 126 int sc_active; /* number of active transfers */ 127 struct disk sc_dkdev; /* generic disk device info */ 128 struct vndgeom sc_geom; /* virtual geometry */ 129 struct pool sc_vxpool; /* vndxfer pool */ 130 struct pool sc_vbpool; /* vndbuf pool */ 131 struct lwp *sc_kthread; /* kernel thread */ 132 u_int32_t sc_comp_blksz; /* precompressed block size */ 133 u_int32_t sc_comp_numoffs;/* count of compressed block offsets */ 134 u_int64_t *sc_comp_offsets;/* file idx's to compressed blocks */ 135 unsigned char *sc_comp_buff; /* compressed data buffer */ 136 unsigned char *sc_comp_decombuf;/* decompressed data buffer */ 137 int32_t sc_comp_buffblk;/*current decompressed block */ 138 z_stream sc_comp_stream;/* decompress descriptor */ 139 }; 140 #endif 141 142 /* sc_flags */ 143 #define VNF_INITED 0x001 /* unit has been initialized */ 144 #define VNF_WLABEL 0x002 /* label area is writable */ 145 #define VNF_LABELLING 0x004 /* unit is currently being labelled */ 146 #define VNF_WANTED 0x008 /* someone is waiting to obtain a lock */ 147 #define VNF_LOCKED 0x010 /* unit is locked */ 148 #define VNF_READONLY 0x020 /* unit is read-only */ 149 #define VNF_KLABEL 0x040 /* keep label on close */ 150 #define VNF_VLABEL 0x080 /* label is valid */ 151 #define VNF_KTHREAD 0x100 /* thread is running */ 152 #define VNF_VUNCONF 0x200 /* device is unconfiguring */ 153 #define VNF_COMP 0x400 /* file is compressed */ 154 #define VNF_CLEARING 0x800 /* unit is being torn down */ 155 #define VNF_USE_VN_RDWR 0x1000 /* have to use vn_rdwr() */ 156 157 /* structure of header in a compressed file */ 158 struct vnd_comp_header 159 { 160 char preamble[128]; 161 u_int32_t block_size; 162 u_int32_t num_blocks; 163 }; 164 #endif /* !defined(__minix) */ 165 166 /* 167 * A simple structure for describing which vnd units are in use. 168 */ 169 170 struct vnd_user { 171 int vnu_unit; /* which vnd unit */ 172 dev_t vnu_dev; /* file is on this device... */ 173 ino_t vnu_ino; /* ...at this inode */ 174 }; 175 176 /* 177 * Before you can use a unit, it must be configured with VNDIOCSET. 178 * The configuration persists across opens and closes of the device; 179 * an VNDIOCCLR must be used to reset a configuration. An attempt to 180 * VNDIOCSET an already active unit will return EBUSY. 181 */ 182 #define VNDIOCSET _IOWR('F', 0, struct vnd_ioctl) /* enable disk */ 183 #define VNDIOCCLR _IOW('F', 1, struct vnd_ioctl) /* disable disk */ 184 #define VNDIOCGET _IOWR('F', 3, struct vnd_user) /* get list */ 185 186 #ifdef _KERNEL 187 /* 188 * Everything else is kernel-private, mostly exported for compat/netbsd32. 189 * 190 * NetBSD 3.0 had a 32-bit value for vnu_ino. 191 * 192 * NetBSD 5.0 had a 32-bit value for vnu_dev, and vnd_size. 193 */ 194 struct vnd_user30 { 195 int vnu_unit; /* which vnd unit */ 196 uint32_t vnu_dev; /* file is on this device... */ 197 uint32_t vnu_ino; /* ...at this inode */ 198 }; 199 #define VNDIOCGET30 _IOWR('F', 2, struct vnd_user30) /* get list */ 200 201 struct vnd_user50 { 202 int vnu_unit; /* which vnd unit */ 203 uint32_t vnu_dev; /* file is on this device... */ 204 ino_t vnu_ino; /* ...at this inode */ 205 }; 206 #define VNDIOCGET50 _IOWR('F', 3, struct vnd_user50) /* get list */ 207 208 struct vnd_ioctl50 { 209 char *vnd_file; /* pathname of file to mount */ 210 int vnd_flags; /* flags; see below */ 211 struct vndgeom vnd_geom; /* geometry to emulate */ 212 unsigned int vnd_size; /* (returned) size of disk */ 213 }; 214 #define VNDIOCSET50 _IOWR('F', 0, struct vnd_ioctl50) 215 #define VNDIOCCLR50 _IOW('F', 1, struct vnd_ioctl50) 216 217 #endif /* _KERNEL */ 218 219 #endif /* _SYS_DEV_VNDVAR_H_ */ 220