1 /* $OpenBSD: disk.h,v 1.12 2004/02/15 02:45:46 tedu Exp $ */ 2 /* $NetBSD: disk.h,v 1.11 1996/04/28 20:22:50 thorpej Exp $ */ 3 4 /* 5 * Copyright (c) 1995 Jason R. Thorpe. All rights reserved. 6 * Copyright (c) 1992, 1993 7 * The Regents of the University of California. All rights reserved. 8 * 9 * This software was developed by the Computer Systems Engineering group 10 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 11 * contributed to Berkeley. 12 * 13 * All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Lawrence Berkeley Laboratory. 17 * 18 * Redistribution and use in source and binary forms, with or without 19 * modification, are permitted provided that the following conditions 20 * are met: 21 * 1. Redistributions of source code must retain the above copyright 22 * notice, this list of conditions and the following disclaimer. 23 * 2. Redistributions in binary form must reproduce the above copyright 24 * notice, this list of conditions and the following disclaimer in the 25 * documentation and/or other materials provided with the distribution. 26 * 3. 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 * from: Header: disk.h,v 1.5 92/11/19 04:33:03 torek Exp (LBL) 43 * 44 * @(#)disk.h 8.1 (Berkeley) 6/2/93 45 */ 46 47 /* 48 * Disk device structures. 49 */ 50 51 #include <sys/time.h> 52 #include <sys/queue.h> 53 #include <sys/lock.h> 54 55 struct buf; 56 struct disklabel; 57 struct cpu_disklabel; 58 59 #define DS_DISKNAMELEN 16 60 61 struct diskstats { 62 char ds_name[DS_DISKNAMELEN]; 63 int ds_busy; /* busy counter */ 64 u_int64_t ds_rxfer; /* total number of read transfers */ 65 u_int64_t ds_wxfer; /* total number of write transfers */ 66 u_int64_t ds_seek; /* total independent seek operations */ 67 u_int64_t ds_rbytes; /* total bytes read */ 68 u_int64_t ds_wbytes; /* total bytes written */ 69 struct timeval ds_attachtime; /* time disk was attached */ 70 struct timeval ds_timestamp; /* timestamp of last unbusy */ 71 struct timeval ds_time; /* total time spent busy */ 72 }; 73 74 struct disk { 75 TAILQ_ENTRY(disk) dk_link; /* link in global disklist */ 76 struct lock dk_lock; /* disk lock */ 77 char *dk_name; /* disk name */ 78 int dk_flags; /* disk flags */ 79 #define DKF_CONSTRUCTED 0x0001 80 81 /* 82 * Metrics data; note that some metrics may have no meaning 83 * on certain types of disks. 84 */ 85 int dk_busy; /* busy counter */ 86 u_int64_t dk_rxfer; /* total number of read transfers */ 87 u_int64_t dk_wxfer; /* total number of write transfers */ 88 u_int64_t dk_seek; /* total independent seek operations */ 89 u_int64_t dk_rbytes; /* total bytes read */ 90 u_int64_t dk_wbytes; /* total bytes written */ 91 struct timeval dk_attachtime; /* time disk was attached */ 92 struct timeval dk_timestamp; /* timestamp of last unbusy */ 93 struct timeval dk_time; /* total time spent busy */ 94 95 int dk_bopenmask; /* block devices open */ 96 int dk_copenmask; /* character devices open */ 97 int dk_openmask; /* composite (bopen|copen) */ 98 int dk_state; /* label state ### */ 99 int dk_blkshift; /* shift to convert DEV_BSIZE to blks*/ 100 int dk_byteshift; /* shift to convert bytes to blks */ 101 102 struct dkdriver *dk_driver; /* pointer to driver */ 103 104 /* 105 * Disk label information. Storage for the in-core disk label 106 * must be dynamically allocated, otherwise the size of this 107 * structure becomes machine-dependent. 108 */ 109 daddr_t dk_labelsector; /* sector containing label */ 110 struct disklabel *dk_label; /* label */ 111 struct cpu_disklabel *dk_cpulabel; 112 }; 113 114 struct dkdriver { 115 void (*d_strategy)(struct buf *); 116 #ifdef notyet 117 int (*d_open)(dev_t dev, int ifmt, int, struct proc *); 118 int (*d_close)(dev_t dev, int, int ifmt, struct proc *); 119 int (*d_ioctl)(dev_t dev, u_long cmd, caddr_t data, int fflag, 120 struct proc *); 121 int (*d_dump)(dev_t); 122 void (*d_start)(struct buf *, daddr_t); 123 int (*d_mklabel)(struct disk *); 124 #endif 125 }; 126 127 /* states */ 128 #define DK_CLOSED 0 /* drive is closed */ 129 #define DK_WANTOPEN 1 /* drive being opened */ 130 #define DK_WANTOPENRAW 2 /* drive being opened */ 131 #define DK_RDLABEL 3 /* label being read */ 132 #define DK_OPEN 4 /* label read, drive open */ 133 #define DK_OPENRAW 5 /* open without label */ 134 135 #ifdef DISKSORT_STATS 136 /* 137 * Stats from disksort(). 138 */ 139 struct disksort_stats { 140 long ds_newhead; /* # new queue heads created */ 141 long ds_newtail; /* # new queue tails created */ 142 long ds_midfirst; /* # insertions into sort list */ 143 long ds_endfirst; /* # insertions at end of sort list */ 144 long ds_newsecond; /* # inversions (2nd lists) created */ 145 long ds_midsecond; /* # insertions into 2nd list */ 146 long ds_endsecond; /* # insertions at end of 2nd list */ 147 }; 148 #endif 149 150 /* 151 * disklist_head is defined here so that user-land has access to it. 152 */ 153 TAILQ_HEAD(disklist_head, disk); /* the disklist is a TAILQ */ 154 155 #ifdef _KERNEL 156 extern int disk_count; /* number of disks in global disklist */ 157 extern int disk_change; /* disk attached/detached */ 158 159 void disk_init(void); 160 int disk_construct(struct disk *, char *); 161 void disk_attach(struct disk *); 162 void disk_detach(struct disk *); 163 void disk_busy(struct disk *); 164 void disk_unbusy(struct disk *, long, int); 165 void disk_resetstat(struct disk *); 166 struct disk *disk_find(char *); 167 168 int disk_lock(struct disk *); 169 void disk_unlock(struct disk *); 170 171 struct device; 172 void dk_establish(struct disk *, struct device *); 173 #endif 174