/* $OpenBSD: disk.h,v 1.18 2007/12/23 01:59:58 dlg 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 #include #include #include struct buf; 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; /* timestamp of last 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 */ int dk_flags; /* disk flags */ #define DKF_CONSTRUCTED 0x0001 /* * 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; /* timestamp of last unbusy */ struct timeval dk_time; /* total time spent busy */ int dk_bopenmask; /* block devices open */ int dk_copenmask; /* character devices open */ int 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 */ struct dkdriver *dk_driver; /* pointer to driver */ /* * Disk label information. Storage for the in-core disk label * must be dynamically allocated, otherwise the size of this * structure becomes machine-dependent. */ daddr64_t dk_labelsector; /* sector containing label */ struct disklabel *dk_label; /* label */ }; struct dkdriver { void (*d_strategy)(struct buf *); #ifdef notyet int (*d_open)(dev_t dev, int ifmt, int, struct proc *); int (*d_close)(dev_t dev, int, int ifmt, struct proc *); int (*d_ioctl)(dev_t dev, u_long cmd, caddr_t data, int fflag, struct proc *); int (*d_dump)(dev_t); void (*d_start)(struct buf *, daddr64_t); int (*d_mklabel)(struct disk *); #endif }; /* 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 */ #ifdef DISKSORT_STATS /* * Stats from disksort(). */ struct disksort_stats { long ds_newhead; /* # new queue heads created */ long ds_newtail; /* # new queue tails created */ long ds_midfirst; /* # insertions into sort list */ long ds_endfirst; /* # insertions at end of sort list */ long ds_newsecond; /* # inversions (2nd lists) created */ long ds_midsecond; /* # insertions into 2nd list */ long ds_endsecond; /* # insertions at end of 2nd list */ }; #endif /* * 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 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 *, char *); void disk_attach(struct disk *); void disk_detach(struct disk *); void disk_busy(struct disk *); void disk_unbusy(struct disk *, long, int); int disk_lock(struct disk *); void disk_unlock(struct disk *); #endif