1 /* $OpenBSD: disk.h,v 1.41 2024/10/30 15:00:12 deraadt 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/device.h> 52 #include <sys/time.h> 53 #include <sys/queue.h> 54 #include <sys/rwlock.h> 55 #include <sys/mutex.h> 56 57 struct 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; /* time of first busy or any 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 rwlock dk_lock; /* disk lock */ 77 struct mutex dk_mtx; /* busy/unbusy mtx */ 78 char *dk_name; /* disk name */ 79 struct device *dk_device; /* disk device structure. */ 80 dev_t dk_devno; /* disk device number. */ 81 int dk_flags; /* disk flags */ 82 #define DKF_CONSTRUCTED 0x0001 83 #define DKF_OPENED 0x0002 84 #define DKF_NOLABELREAD 0x0004 85 86 /* 87 * Metrics data; note that some metrics may have no meaning 88 * on certain types of disks. 89 */ 90 int dk_busy; /* busy counter */ 91 u_int64_t dk_rxfer; /* total number of read transfers */ 92 u_int64_t dk_wxfer; /* total number of write transfers */ 93 u_int64_t dk_seek; /* total independent seek operations */ 94 u_int64_t dk_rbytes; /* total bytes read */ 95 u_int64_t dk_wbytes; /* total bytes written */ 96 struct timeval dk_attachtime; /* time disk was attached */ 97 struct timeval dk_timestamp; /* time of first busy or any unbusy */ 98 struct timeval dk_time; /* total time spent busy */ 99 100 int dk_bopenmask; /* block devices open */ 101 int dk_copenmask; /* character devices open */ 102 int dk_openmask; /* composite (bopen|copen) */ 103 int dk_state; /* label state ### */ 104 int dk_blkshift; /* shift to convert DEV_BSIZE to blks*/ 105 int dk_byteshift; /* shift to convert bytes to blks */ 106 107 /* 108 * Disk label information. Storage for the in-core disk label 109 * must be dynamically allocated, otherwise the size of this 110 * structure becomes machine-dependent. 111 */ 112 struct disklabel *dk_label; 113 }; 114 115 /* states */ 116 #define DK_CLOSED 0 /* drive is closed */ 117 #define DK_WANTOPEN 1 /* drive being opened */ 118 #define DK_WANTOPENRAW 2 /* drive being opened */ 119 #define DK_RDLABEL 3 /* label being read */ 120 #define DK_OPEN 4 /* label read, drive open */ 121 #define DK_OPENRAW 5 /* open without label */ 122 123 /* Disk map flags. */ 124 #define DM_OPENPART 0x1 /* Open raw partition. */ 125 #define DM_OPENBLCK 0x2 /* Open block device. */ 126 127 /* 128 * disklist_head is defined here so that user-land has access to it. 129 */ 130 TAILQ_HEAD(disklist_head, disk); /* the disklist is a TAILQ */ 131 132 #ifdef _KERNEL 133 extern struct disklist_head disklist; /* list of disks attached to system */ 134 extern int disk_count; /* number of disks in global disklist */ 135 extern int disk_change; /* disk attached/detached */ 136 137 void disk_init(void); 138 int disk_construct(struct disk *); 139 void disk_attach(struct device *, struct disk *); 140 void disk_detach(struct disk *); 141 int disk_openpart(struct disk *, int, int, int); 142 void disk_closepart(struct disk *, int, int); 143 void disk_gone(int (*)(dev_t, int, int, struct proc *), int); 144 void disk_busy(struct disk *); 145 void disk_unbusy(struct disk *, long, daddr_t, int); 146 147 int disk_lock(struct disk *); 148 void disk_lock_nointr(struct disk *); 149 void disk_unlock(struct disk *); 150 struct device *disk_lookup(struct cfdriver *, int); 151 152 char *disk_readlabel(struct disklabel *, dev_t, char *, size_t); 153 154 int disk_map(const char *, char *, int, int); 155 156 int duid_iszero(u_char *); 157 const char *duid_format(u_char *); 158 #endif 159