118 lines
4.6 KiB
C
118 lines
4.6 KiB
C
/*
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This software was developed by the Computer Systems Engineering group
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* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
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* contributed to Berkeley.
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*
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* All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Lawrence Berkeley Laboratory.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)disk.h 8.1 (Berkeley) 6/2/93
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*
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* $Id: disk.h,v 1.2 1994/08/02 07:52:48 davidg Exp $
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*/
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#ifndef _SYS_DISK_H_
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#define _SYS_DISK_H_
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/*
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* Disk device structures.
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*
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* Note that this is only a preliminary outline. The final disk structures
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* may be somewhat different.
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*/
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struct buf;
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struct dkdevice {
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struct device dk_dev; /* base device */
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struct dkdevice *dk_next; /* list of disks; not yet used */
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int dk_bps; /* xfer rate: bytes per second */
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int dk_bopenmask; /* block devices open */
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int dk_copenmask; /* character devices open */
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int dk_openmask; /* composite (bopen|copen) */
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int dk_state; /* label state ### */
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int dk_blkshift; /* shift to convert DEV_BSIZE to blks */
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int dk_byteshift; /* shift to convert bytes to blks */
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struct dkdriver *dk_driver; /* pointer to driver */
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daddr_t dk_labelsector; /* sector containing label */
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struct disklabel dk_label; /* label */
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};
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struct dkdriver {
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void (*d_strategy) __P((struct buf *));
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#ifdef notyet
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int (*d_open) __P((dev_t dev, int ifmt, int, struct proc *));
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int (*d_close) __P((dev_t dev, int, int ifmt, struct proc *));
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int (*d_ioctl) __P((dev_t dev, int cmd, caddr_t data, int fflag,
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struct proc *));
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int (*d_dump) __P((dev_t));
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void (*d_start) __P((struct buf *, daddr_t));
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int (*d_mklabel) __P((struct dkdevice *));
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#endif
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};
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/* states */
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#define DK_CLOSED 0 /* drive is closed */
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#define DK_WANTOPEN 1 /* drive being opened */
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#define DK_WANTOPENRAW 2 /* drive being opened */
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#define DK_RDLABEL 3 /* label being read */
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#define DK_OPEN 4 /* label read, drive open */
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#define DK_OPENRAW 5 /* open without label */
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#ifdef DISKSORT_STATS
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/*
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* Stats from disksort().
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*/
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struct disksort_stats {
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long ds_newhead; /* # new queue heads created */
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long ds_newtail; /* # new queue tails created */
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long ds_midfirst; /* # insertions into sort list */
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long ds_endfirst; /* # insertions at end of sort list */
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long ds_newsecond; /* # inversions (2nd lists) created */
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long ds_midsecond; /* # insertions into 2nd list */
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long ds_endsecond; /* # insertions at end of 2nd list */
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};
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#endif
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#ifdef KERNEL
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void disksort __P((struct buf *, struct buf *));
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char *readdisklabel __P((struct dkdevice *, int));
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int setdisklabel __P((struct dkdevice *, struct disklabel *));
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int writedisklabel __P((struct dkdevice *, int));
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int diskerr __P((struct dkdevice *, struct buf *, char *, int, int));
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#endif
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#endif
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