/
disk.h
117 lines (109 loc) · 4.57 KB
/
disk.h
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
/*
* 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. 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, Berkeley and its contributors.
* 4. 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.
*
* @(#)disk.h 8.1 (Berkeley) 6/2/93
*
* $Id: disk.h,v 1.8 1997/09/21 22:09:05 gibbs Exp $
*/
#ifndef _SYS_DISK_H_
#define _SYS_DISK_H_
/*
* Disk device structures.
*
* Note that this is only a preliminary outline. The final disk structures
* may be somewhat different.
*/
struct buf;
struct dkdevice {
struct device dk_dev; /* base device */
struct dkdevice *dk_next; /* list of disks; not yet used */
int dk_bps; /* xfer rate: bytes per second */
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 */
daddr_t dk_labelsector; /* sector containing label */
struct disklabel dk_label; /* label */
};
struct dkdriver {
void (*d_strategy) __P((struct buf *));
#ifdef notyet
int (*d_open) __P((dev_t dev, int ifmt, int, struct proc *));
int (*d_close) __P((dev_t dev, int, int ifmt, struct proc *));
int (*d_ioctl) __P((dev_t dev, int cmd, caddr_t data, int fflag,
struct proc *));
int (*d_dump) __P((dev_t));
void (*d_start) __P((struct buf *, daddr_t));
int (*d_mklabel) __P((struct dkdevice *));
#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
#ifdef KERNEL
void bufqdisksort __P((struct buf_queue_head *, struct buf *));
char *readdisklabel __P((struct dkdevice *, int));
int setdisklabel __P((struct dkdevice *, struct disklabel *));
int writedisklabel __P((struct dkdevice *, int));
int diskerr __P((struct dkdevice *, struct buf *, char *, int, int));
#endif
#endif