-
Notifications
You must be signed in to change notification settings - Fork 24
/
disk.h
210 lines (190 loc) · 7.8 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
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
/* $NetBSD: disk.h,v 1.24 2003/08/07 16:34:01 agc Exp $ */
/*-
* Copyright (c) 1996, 1997 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
* NASA Ames Research Center.
*
* 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 NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
/*
* 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 Laboratories.
*
* 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 8.2 (Berkeley) 1/9/95
*/
#ifndef _SYS_DISK_H_
#define _SYS_DISK_H_
/*
* Disk device structures.
*/
#include <sys/time.h>
#include <sys/queue.h>
struct buf;
struct disklabel;
struct cpu_disklabel;
struct disk {
TAILQ_ENTRY(disk) dk_link; /* link in global disklist */
char *dk_name; /* disk name */
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 */
/*
* 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 */
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.
*/
daddr_t dk_labelsector; /* sector containing label */
struct disklabel *dk_label; /* label */
struct cpu_disklabel *dk_cpulabel;
};
#define DK_DISKNAMELEN 16
/* The following structure is 64-bit alignment safe */
struct disk_sysctl {
char dk_name[DK_DISKNAMELEN];
int32_t dk_busy;
int32_t pad;
u_int64_t dk_xfer;
u_int64_t dk_seek;
u_int64_t dk_bytes;
u_int32_t dk_attachtime_sec;
u_int32_t dk_attachtime_usec;
u_int32_t dk_timestamp_sec;
u_int32_t dk_timestamp_usec;
u_int32_t dk_time_sec;
u_int32_t dk_time_usec;
/* New separate read/write stats */
u_int64_t dk_rxfer;
u_int64_t dk_rbytes;
u_int64_t dk_wxfer;
u_int64_t dk_wbytes;
};
struct dkdriver {
void (*d_strategy) __P((struct buf *));
#ifdef notyet
int (*d_open) __P((dev_t, int, int, struct proc *));
int (*d_close) __P((dev_t, int, int, struct proc *));
int (*d_ioctl) __P((dev_t, u_long, caddr_t, int, struct proc *));
int (*d_dump) __P((dev_t));
void (*d_start) __P((struct buf *, daddr_t));
int (*d_mklabel) __P((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 */
/*
* disklist_head is defined here so that user-land has access to it.
*/
TAILQ_HEAD(disklist_head, disk); /* the disklist is a TAILQ */
/*
* Bad sector lists per fixed disk
*/
struct disk_badsectors {
SLIST_ENTRY(disk_badsectors) dbs_next;
daddr_t dbs_min; /* min. sector number */
daddr_t dbs_max; /* max. sector number */
struct timeval dbs_failedat; /* first failure at */
};
struct disk_badsecinfo {
u_int32_t dbsi_bufsize; /* size of region pointed to */
u_int32_t dbsi_skip; /* how many to skip past */
u_int32_t dbsi_copied; /* how many got copied back */
u_int32_t dbsi_left; /* remaining to copy */
caddr_t dbsi_buffer; /* region to copy disk_badsectors to */
};
#ifdef _KERNEL
extern int disk_count; /* number of disks in global disklist */
void disk_init __P((void));
void disk_attach __P((struct disk *));
void disk_detach __P((struct disk *));
void disk_busy __P((struct disk *));
void disk_unbusy __P((struct disk *, long, int));
void disk_resetstat __P((struct disk *));
struct disk *disk_find __P((char *));
#endif
#endif /* _SYS_DISK_H_ */