/* $OpenBSD: disk.h,v 1.42 2025/09/15 10:33:03 krw Exp $ */ /* $NetBSD: disk.h,v 1.11 1996/04/28 20:22:50 thorpej Exp $ */ /* * Copyright (c) 1995 Jason R. Thorpe. All rights reserved. * Copyright (c) 1992, 1993 * The Regents of the University of California. All rights reserved. * * This software was developed by the Computer Systems Engineering group * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and * contributed to Berkeley. * * All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Lawrence Berkeley Laboratory. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * from: Header: disk.h,v 1.5 92/11/19 04:33:03 torek Exp (LBL) * * @(#)disk.h 8.1 (Berkeley) 6/2/93 */ /* * Disk device structures. */ #include <sys/device.h> #include <sys/time.h> #include <sys/queue.h> #include <sys/rwlock.h> #include <sys/mutex.h> struct disklabel; #define DS_DISKNAMELEN 16 struct diskstats { char ds_name[DS_DISKNAMELEN]; int ds_busy; /* busy counter */ u_int64_t ds_rxfer; /* total number of read transfers */ u_int64_t ds_wxfer; /* total number of write transfers */ u_int64_t ds_seek; /* total independent seek operations */ u_int64_t ds_rbytes; /* total bytes read */ u_int64_t ds_wbytes; /* total bytes written */ struct timeval ds_attachtime; /* time disk was attached */ struct timeval ds_timestamp; /* time of first busy or any unbusy */ struct timeval ds_time; /* total time spent busy */ }; struct disk { TAILQ_ENTRY(disk) dk_link; /* link in global disklist */ struct rwlock dk_lock; /* disk lock */ struct mutex dk_mtx; /* busy/unbusy mtx */ char *dk_name; /* disk name */ struct device *dk_device; /* disk device structure. */ dev_t dk_devno; /* disk device number. */ int dk_flags; /* disk flags */ #define DKF_CONSTRUCTED 0x0001 #define DKF_OPENED 0x0002 #define DKF_NOLABELREAD 0x0004 /* * Metrics data; note that some metrics may have no meaning * on certain types of disks. */ int dk_busy; /* busy counter */ u_int64_t dk_rxfer; /* total number of read transfers */ u_int64_t dk_wxfer; /* total number of write transfers */ u_int64_t dk_seek; /* total independent seek operations */ u_int64_t dk_rbytes; /* total bytes read */ u_int64_t dk_wbytes; /* total bytes written */ struct timeval dk_attachtime; /* time disk was attached */ struct timeval dk_timestamp; /* time of first busy or any unbusy */ struct timeval dk_time; /* total time spent busy */ uint64_t dk_bopenmask; /* block devices open */ uint64_t dk_copenmask; /* character devices open */ uint64_t dk_openmask; /* composite (bopen|copen) */ int dk_state; /* label state ### */ int dk_blkshift; /* shift to convert DEV_BSIZE to blks*/ int dk_byteshift; /* shift to convert bytes to blks */ /* * Disk label information. Storage for the in-core disk label * must be dynamically allocated, otherwise the size of this * structure becomes machine-dependent. */ struct disklabel *dk_label; }; /* states */ #define DK_CLOSED 0 /* drive is closed */ #define DK_WANTOPEN 1 /* drive being opened */ #define DK_WANTOPENRAW 2 /* drive being opened */ #define DK_RDLABEL 3 /* label being read */ #define DK_OPEN 4 /* label read, drive open */ #define DK_OPENRAW 5 /* open without label */ /* Disk map flags. */ #define DM_OPENPART 0x1 /* Open raw partition. */ #define DM_OPENBLCK 0x2 /* Open block device. */ /* * disklist_head is defined here so that user-land has access to it. */ TAILQ_HEAD(disklist_head, disk); /* the disklist is a TAILQ */ #ifdef _KERNEL extern struct disklist_head disklist; /* list of disks attached to system */ extern int disk_count; /* number of disks in global disklist */ extern int disk_change; /* disk attached/detached */ void disk_init(void); int disk_construct(struct disk *); void disk_attach(struct device *, struct disk *); void disk_detach(struct disk *); int disk_openpart(struct disk *, int, int, int); void disk_closepart(struct disk *, int, int); void disk_gone(int (*)(dev_t, int, int, struct proc *), int); void disk_busy(struct disk *); void disk_unbusy(struct disk *, long, daddr_t, int); int disk_lock(struct disk *); void disk_lock_nointr(struct disk *); void disk_unlock(struct disk *); struct device *disk_lookup(struct cfdriver *, int); char *disk_readlabel(struct disklabel *, dev_t, char *, size_t); int disk_map(const char *, char *, int, int); int duid_iszero(u_char *); const char *duid_format(u_char *); #endif
