Annotation of sys/sys/disk.h, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: disk.h,v 1.17 2007/06/20 18:15:47 deraadt Exp $ */
2: /* $NetBSD: disk.h,v 1.11 1996/04/28 20:22:50 thorpej Exp $ */
3:
4: /*
5: * Copyright (c) 1995 Jason R. Thorpe. All rights reserved.
6: * Copyright (c) 1992, 1993
7: * The Regents of the University of California. All rights reserved.
8: *
9: * This software was developed by the Computer Systems Engineering group
10: * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
11: * contributed to Berkeley.
12: *
13: * All advertising materials mentioning features or use of this software
14: * must display the following acknowledgement:
15: * This product includes software developed by the University of
16: * California, Lawrence Berkeley Laboratory.
17: *
18: * Redistribution and use in source and binary forms, with or without
19: * modification, are permitted provided that the following conditions
20: * are met:
21: * 1. Redistributions of source code must retain the above copyright
22: * notice, this list of conditions and the following disclaimer.
23: * 2. Redistributions in binary form must reproduce the above copyright
24: * notice, this list of conditions and the following disclaimer in the
25: * documentation and/or other materials provided with the distribution.
26: * 3. Neither the name of the University nor the names of its contributors
27: * may be used to endorse or promote products derived from this software
28: * without specific prior written permission.
29: *
30: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
31: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
32: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
33: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
34: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
35: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
36: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
37: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
38: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
39: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
40: * SUCH DAMAGE.
41: *
42: * from: Header: disk.h,v 1.5 92/11/19 04:33:03 torek Exp (LBL)
43: *
44: * @(#)disk.h 8.1 (Berkeley) 6/2/93
45: */
46:
47: /*
48: * Disk device structures.
49: */
50:
51: #include <sys/time.h>
52: #include <sys/queue.h>
53: #include <sys/rwlock.h>
54:
55: struct buf;
56: struct disklabel;
57:
58: #define DS_DISKNAMELEN 16
59:
60: struct diskstats {
61: char ds_name[DS_DISKNAMELEN];
62: int ds_busy; /* busy counter */
63: u_int64_t ds_rxfer; /* total number of read transfers */
64: u_int64_t ds_wxfer; /* total number of write transfers */
65: u_int64_t ds_seek; /* total independent seek operations */
66: u_int64_t ds_rbytes; /* total bytes read */
67: u_int64_t ds_wbytes; /* total bytes written */
68: struct timeval ds_attachtime; /* time disk was attached */
69: struct timeval ds_timestamp; /* timestamp of last unbusy */
70: struct timeval ds_time; /* total time spent busy */
71: };
72:
73: struct disk {
74: TAILQ_ENTRY(disk) dk_link; /* link in global disklist */
75: struct rwlock dk_lock; /* disk lock */
76: char *dk_name; /* disk name */
77: int dk_flags; /* disk flags */
78: #define DKF_CONSTRUCTED 0x0001
79:
80: /*
81: * Metrics data; note that some metrics may have no meaning
82: * on certain types of disks.
83: */
84: int dk_busy; /* busy counter */
85: u_int64_t dk_rxfer; /* total number of read transfers */
86: u_int64_t dk_wxfer; /* total number of write transfers */
87: u_int64_t dk_seek; /* total independent seek operations */
88: u_int64_t dk_rbytes; /* total bytes read */
89: u_int64_t dk_wbytes; /* total bytes written */
90: struct timeval dk_attachtime; /* time disk was attached */
91: struct timeval dk_timestamp; /* timestamp of last unbusy */
92: struct timeval dk_time; /* total time spent busy */
93:
94: int dk_bopenmask; /* block devices open */
95: int dk_copenmask; /* character devices open */
96: int dk_openmask; /* composite (bopen|copen) */
97: int dk_state; /* label state ### */
98: int dk_blkshift; /* shift to convert DEV_BSIZE to blks*/
99: int dk_byteshift; /* shift to convert bytes to blks */
100:
101: struct dkdriver *dk_driver; /* pointer to driver */
102:
103: /*
104: * Disk label information. Storage for the in-core disk label
105: * must be dynamically allocated, otherwise the size of this
106: * structure becomes machine-dependent.
107: */
108: daddr64_t dk_labelsector; /* sector containing label */
109: struct disklabel *dk_label; /* label */
110: };
111:
112: struct dkdriver {
113: void (*d_strategy)(struct buf *);
114: #ifdef notyet
115: int (*d_open)(dev_t dev, int ifmt, int, struct proc *);
116: int (*d_close)(dev_t dev, int, int ifmt, struct proc *);
117: int (*d_ioctl)(dev_t dev, u_long cmd, caddr_t data, int fflag,
118: struct proc *);
119: int (*d_dump)(dev_t);
120: void (*d_start)(struct buf *, daddr64_t);
121: int (*d_mklabel)(struct disk *);
122: #endif
123: };
124:
125: /* states */
126: #define DK_CLOSED 0 /* drive is closed */
127: #define DK_WANTOPEN 1 /* drive being opened */
128: #define DK_WANTOPENRAW 2 /* drive being opened */
129: #define DK_RDLABEL 3 /* label being read */
130: #define DK_OPEN 4 /* label read, drive open */
131: #define DK_OPENRAW 5 /* open without label */
132:
133: #ifdef DISKSORT_STATS
134: /*
135: * Stats from disksort().
136: */
137: struct disksort_stats {
138: long ds_newhead; /* # new queue heads created */
139: long ds_newtail; /* # new queue tails created */
140: long ds_midfirst; /* # insertions into sort list */
141: long ds_endfirst; /* # insertions at end of sort list */
142: long ds_newsecond; /* # inversions (2nd lists) created */
143: long ds_midsecond; /* # insertions into 2nd list */
144: long ds_endsecond; /* # insertions at end of 2nd list */
145: };
146: #endif
147:
148: /*
149: * disklist_head is defined here so that user-land has access to it.
150: */
151: TAILQ_HEAD(disklist_head, disk); /* the disklist is a TAILQ */
152:
153: #ifdef _KERNEL
154: extern int disk_count; /* number of disks in global disklist */
155: extern int disk_change; /* disk attached/detached */
156:
157: void disk_init(void);
158: int disk_construct(struct disk *, char *);
159: void disk_attach(struct disk *);
160: void disk_detach(struct disk *);
161: void disk_busy(struct disk *);
162: void disk_unbusy(struct disk *, long, int);
163:
164: int disk_lock(struct disk *);
165: void disk_unlock(struct disk *);
166: #endif
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