1 /* 2 * Copyright (c) 1992 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * This software was developed by the Computer Systems Engineering group 6 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 7 * contributed to Berkeley. 8 * 9 * All advertising materials mentioning features or use of this software 10 * must display the following acknowledgement: 11 * This product includes software developed by the University of 12 * California, Lawrence Berkeley Laboratory. 13 * 14 * Redistribution and use in source and binary forms, with or without 15 * modification, are permitted provided that the following conditions 16 * are met: 17 * 1. Redistributions of source code must retain the above copyright 18 * notice, this list of conditions and the following disclaimer. 19 * 2. Redistributions in binary form must reproduce the above copyright 20 * notice, this list of conditions and the following disclaimer in the 21 * documentation and/or other materials provided with the distribution. 22 * 3. All advertising materials mentioning features or use of this software 23 * must display the following acknowledgement: 24 * This product includes software developed by the University of 25 * California, Berkeley and its contributors. 26 * 4. Neither the name of the University nor the names of its contributors 27 * may be used to endorse or promote products derived from this software 28 * without specific prior written permission. 29 * 30 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 31 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 32 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 33 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 34 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 35 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 36 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 37 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 38 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 39 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 40 * SUCH DAMAGE. 41 * 42 * @(#)disk.h 5.1 (Berkeley) 7/10/92 43 * 44 * from: $Header: /cvsroot/src/sys/sys/disk.h,v 1.1 1993/08/13 13:20:10 glass Exp $ (LBL) 45 */ 46 47 /* 48 * Disk device structures. 49 * 50 * Note that this is only a preliminary outline. The final disk structures 51 * may be somewhat different. 52 */ 53 struct buf; 54 55 struct dkdevice { 56 struct device dk_dev; /* base device */ 57 struct dkdevice *dk_next; /* list of disks; not yet used */ 58 int dk_bps; /* xfer rate: bytes per second */ 59 int dk_bopenmask; /* block devices open */ 60 int dk_copenmask; /* character devices open */ 61 int dk_openmask; /* composite (bopen|copen) */ 62 int dk_state; /* label state ### */ 63 int dk_blkshift; /* shift to convert DEV_BSIZE to blks */ 64 int dk_byteshift; /* shift to convert bytes to blks */ 65 struct dkdriver *dk_driver; /* pointer to driver */ 66 daddr_t dk_labelsector; /* sector containing label */ 67 struct disklabel dk_label; /* label */ 68 }; 69 70 struct dkdriver { 71 void (*d_strategy) __P((struct buf *)); 72 #ifdef notyet 73 int (*d_open) __P((dev_t dev, int ifmt, int, struct proc *)); 74 int (*d_close) __P((dev_t dev, int, int ifmt, struct proc *)); 75 int (*d_ioctl) __P((dev_t dev, int cmd, caddr_t data, int fflag, 76 struct proc *)); 77 int (*d_dump) __P((dev_t)); 78 void (*d_start) __P((struct buf *, daddr_t)); 79 int (*d_mklabel) __P((struct dkdevice *)); 80 #endif 81 }; 82 83 /* states */ 84 #define DK_CLOSED 0 /* drive is closed */ 85 #define DK_WANTOPEN 1 /* drive being opened */ 86 #define DK_WANTOPENRAW 2 /* drive being opened */ 87 #define DK_RDLABEL 3 /* label being read */ 88 #define DK_OPEN 4 /* label read, drive open */ 89 #define DK_OPENRAW 5 /* open without label */ 90 91 #ifdef DISKSORT_STATS 92 /* 93 * Stats from disksort(). 94 */ 95 struct disksort_stats { 96 long ds_newhead; /* # new queue heads created */ 97 long ds_newtail; /* # new queue tails created */ 98 long ds_midfirst; /* # insertions into sort list */ 99 long ds_endfirst; /* # insertions at end of sort list */ 100 long ds_newsecond; /* # inversions (2nd lists) created */ 101 long ds_midsecond; /* # insertions into 2nd list */ 102 long ds_endsecond; /* # insertions at end of 2nd list */ 103 }; 104 #endif 105 106 #ifdef KERNEL 107 void disksort __P((struct buf *, struct buf *)); 108 char *readdisklabel __P((struct dkdevice *, int)); 109 int setdisklabel __P((struct dkdevice *, struct disklabel *)); 110 int writedisklabel __P((struct dkdevice *, int)); 111 int diskerr __P((struct dkdevice *, struct buf *, char *, int, int)); 112 #endif 113