ccdvar.h revision 1.19
1 /* $NetBSD: ccdvar.h,v 1.19 1999/08/11 02:44:35 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 1996, 1997, 1998, 1999 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 $Hdr: cdvar.h 1.1 90/07/09$ 77 * 78 * @(#)cdvar.h 8.1 (Berkeley) 6/10/93 79 */ 80 81 #include <sys/lock.h> 82 #include <sys/queue.h> 83 84 /* 85 * Dynamic configuration and disklabel support by: 86 * Jason R. Thorpe <thorpej (at) nas.nasa.gov> 87 * Numerical Aerodynamic Simulation Facility 88 * Mail Stop 258-6 89 * NASA Ames Research Center 90 * Moffett Field, CA 94035 91 */ 92 93 /* 94 * This structure is used to configure a ccd via ioctl(2). 95 */ 96 struct ccd_ioctl { 97 char **ccio_disks; /* pointer to component paths */ 98 int ccio_ndisks; /* number of disks to concatenate */ 99 int ccio_ileave; /* interleave (DEV_BSIZE blocks) */ 100 int ccio_flags; /* see sc_flags below */ 101 int ccio_unit; /* unit number: use varies */ 102 size_t ccio_size; /* (returned) size of ccd */ 103 }; 104 105 /* 106 * Component info table. 107 * Describes a single component of a concatenated disk. 108 */ 109 struct ccdcinfo { 110 struct vnode *ci_vp; /* device's vnode */ 111 dev_t ci_dev; /* XXX: device's dev_t */ 112 size_t ci_size; /* size */ 113 char *ci_path; /* path to component */ 114 size_t ci_pathlen; /* length of component path */ 115 }; 116 117 /* 118 * Interleave description table. 119 * Computed at boot time to speed irregular-interleave lookups. 120 * The idea is that we interleave in "groups". First we interleave 121 * evenly over all component disks up to the size of the smallest 122 * component (the first group), then we interleave evenly over all 123 * remaining disks up to the size of the next-smallest (second group), 124 * and so on. 125 * 126 * Each table entry describes the interleave characteristics of one 127 * of these groups. For example if a concatenated disk consisted of 128 * three components of 5, 3, and 7 DEV_BSIZE blocks interleaved at 129 * DEV_BSIZE (1), the table would have three entries: 130 * 131 * ndisk startblk startoff dev 132 * 3 0 0 0, 1, 2 133 * 2 9 3 0, 2 134 * 1 13 5 2 135 * 0 - - - 136 * 137 * which says that the first nine blocks (0-8) are interleaved over 138 * 3 disks (0, 1, 2) starting at block offset 0 on any component disk, 139 * the next 4 blocks (9-12) are interleaved over 2 disks (0, 2) starting 140 * at component block 3, and the remaining blocks (13-14) are on disk 141 * 2 starting at offset 5. 142 */ 143 struct ccdiinfo { 144 int ii_ndisk; /* # of disks range is interleaved over */ 145 daddr_t ii_startblk; /* starting scaled block # for range */ 146 daddr_t ii_startoff; /* starting component offset (block #) */ 147 int *ii_index; /* ordered list of components in range */ 148 }; 149 150 /* 151 * Concatenated disk pseudo-geometry information. 152 */ 153 struct ccdgeom { 154 u_int32_t ccg_secsize; /* # bytes per sector */ 155 u_int32_t ccg_nsectors; /* # data sectors per track */ 156 u_int32_t ccg_ntracks; /* # tracks per cylinder */ 157 u_int32_t ccg_ncylinders; /* # cylinders per unit */ 158 }; 159 160 struct ccdbuf; 161 162 /* 163 * A concatenated disk is described after initialization by this structure. 164 */ 165 struct ccd_softc { 166 int sc_flags; /* flags */ 167 size_t sc_size; /* size of ccd */ 168 int sc_ileave; /* interleave */ 169 int sc_nccdisks; /* number of components */ 170 struct ccdcinfo *sc_cinfo; /* component info */ 171 struct ccdiinfo *sc_itable; /* interleave table */ 172 struct ccdgeom sc_geom; /* pseudo geometry info */ 173 char sc_xname[8]; /* XXX external name */ 174 struct disk sc_dkdev; /* generic disk device info */ 175 struct lock sc_lock; /* lock on this structure */ 176 }; 177 178 /* sc_flags */ 179 #define CCDF_UNIFORM 0x02 /* use LCCD of sizes for uniform interleave */ 180 #define CCDF_INITED 0x10 /* unit has been initialized */ 181 #define CCDF_WLABEL 0x20 /* label area is writable */ 182 #define CCDF_LABELLING 0x40 /* unit is currently being labelled */ 183 184 /* Mask of user-settable ccd flags. */ 185 #define CCDF_USERMASK (CCDF_UNIFORM) 186 187 /* 188 * Before you can use a unit, it must be configured with CCDIOCSET. 189 * The configuration persists across opens and closes of the device; 190 * a CCDIOCCLR must be used to reset a configuration. An attempt to 191 * CCDIOCSET an already active unit will return EBUSY. Attempts to 192 * CCDIOCCLR an inactive unit will return ENXIO. 193 */ 194 #define CCDIOCSET _IOWR('F', 16, struct ccd_ioctl) /* enable ccd */ 195 #define CCDIOCCLR _IOW('F', 17, struct ccd_ioctl) /* disable ccd */ 196
Indexes created Mon Sep 22 13:09:51 GMT 2025