FreeBSD/Linux Kernel Cross Reference
sys/sys/disk.h
1 /* $NetBSD: disk.h,v 1.24 2003/08/07 16:34:01 agc Exp $ */
2
3 /*-
4 * Copyright (c) 1996, 1997 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
9 * NASA Ames Research Center.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. All advertising materials mentioning features or use of this software
20 * must display the following acknowledgement:
21 * This product includes software developed by the NetBSD
22 * Foundation, Inc. and its contributors.
23 * 4. Neither the name of The NetBSD Foundation nor the names of its
24 * contributors may be used to endorse or promote products derived
25 * from this software without specific prior written permission.
26 *
27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
37 * POSSIBILITY OF SUCH DAMAGE.
38 */
39
40 /*
41 * Copyright (c) 1992, 1993
42 * The Regents of the University of California. All rights reserved.
43 *
44 * This software was developed by the Computer Systems Engineering group
45 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
46 * contributed to Berkeley.
47 *
48 * All advertising materials mentioning features or use of this software
49 * must display the following acknowledgement:
50 * This product includes software developed by the University of
51 * California, Lawrence Berkeley Laboratories.
52 *
53 * Redistribution and use in source and binary forms, with or without
54 * modification, are permitted provided that the following conditions
55 * are met:
56 * 1. Redistributions of source code must retain the above copyright
57 * notice, this list of conditions and the following disclaimer.
58 * 2. Redistributions in binary form must reproduce the above copyright
59 * notice, this list of conditions and the following disclaimer in the
60 * documentation and/or other materials provided with the distribution.
61 * 3. Neither the name of the University nor the names of its contributors
62 * may be used to endorse or promote products derived from this software
63 * without specific prior written permission.
64 *
65 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
66 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
67 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
68 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
69 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
70 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
71 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
72 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
73 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
74 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
75 * SUCH DAMAGE.
76 *
77 * from: Header: disk.h,v 1.5 92/11/19 04:33:03 torek Exp (LBL)
78 *
79 * @(#)disk.h 8.2 (Berkeley) 1/9/95
80 */
81
82 #ifndef _SYS_DISK_H_
83 #define _SYS_DISK_H_
84
85 /*
86 * Disk device structures.
87 */
88
89 #include <sys/time.h>
90 #include <sys/queue.h>
91
92 struct buf;
93 struct disklabel;
94 struct cpu_disklabel;
95
96 struct disk {
97 TAILQ_ENTRY(disk) dk_link; /* link in global disklist */
98 char *dk_name; /* disk name */
99 int dk_bopenmask; /* block devices open */
100 int dk_copenmask; /* character devices open */
101 int dk_openmask; /* composite (bopen|copen) */
102 int dk_state; /* label state ### */
103 int dk_blkshift; /* shift to convert DEV_BSIZE to blks */
104 int dk_byteshift; /* shift to convert bytes to blks */
105
106 /*
107 * Metrics data; note that some metrics may have no meaning
108 * on certain types of disks.
109 */
110 int dk_busy; /* busy counter */
111 u_int64_t dk_rxfer; /* total number of read transfers */
112 u_int64_t dk_wxfer; /* total number of write transfers */
113 u_int64_t dk_seek; /* total independent seek operations */
114 u_int64_t dk_rbytes; /* total bytes read */
115 u_int64_t dk_wbytes; /* total bytes written */
116 struct timeval dk_attachtime; /* time disk was attached */
117 struct timeval dk_timestamp; /* timestamp of last unbusy */
118 struct timeval dk_time; /* total time spent busy */
119
120 struct dkdriver *dk_driver; /* pointer to driver */
121
122 /*
123 * Disk label information. Storage for the in-core disk label
124 * must be dynamically allocated, otherwise the size of this
125 * structure becomes machine-dependent.
126 */
127 daddr_t dk_labelsector; /* sector containing label */
128 struct disklabel *dk_label; /* label */
129 struct cpu_disklabel *dk_cpulabel;
130 };
131
132 #define DK_DISKNAMELEN 16
133
134 /* The following structure is 64-bit alignment safe */
135 struct disk_sysctl {
136 char dk_name[DK_DISKNAMELEN];
137 int32_t dk_busy;
138 int32_t pad;
139 u_int64_t dk_xfer;
140 u_int64_t dk_seek;
141 u_int64_t dk_bytes;
142 u_int32_t dk_attachtime_sec;
143 u_int32_t dk_attachtime_usec;
144 u_int32_t dk_timestamp_sec;
145 u_int32_t dk_timestamp_usec;
146 u_int32_t dk_time_sec;
147 u_int32_t dk_time_usec;
148 /* New separate read/write stats */
149 u_int64_t dk_rxfer;
150 u_int64_t dk_rbytes;
151 u_int64_t dk_wxfer;
152 u_int64_t dk_wbytes;
153 };
154
155 struct dkdriver {
156 void (*d_strategy) __P((struct buf *));
157 #ifdef notyet
158 int (*d_open) __P((dev_t, int, int, struct proc *));
159 int (*d_close) __P((dev_t, int, int, struct proc *));
160 int (*d_ioctl) __P((dev_t, u_long, caddr_t, int, struct proc *));
161 int (*d_dump) __P((dev_t));
162 void (*d_start) __P((struct buf *, daddr_t));
163 int (*d_mklabel) __P((struct disk *));
164 #endif
165 };
166
167 /* states */
168 #define DK_CLOSED 0 /* drive is closed */
169 #define DK_WANTOPEN 1 /* drive being opened */
170 #define DK_WANTOPENRAW 2 /* drive being opened */
171 #define DK_RDLABEL 3 /* label being read */
172 #define DK_OPEN 4 /* label read, drive open */
173 #define DK_OPENRAW 5 /* open without label */
174
175 /*
176 * disklist_head is defined here so that user-land has access to it.
177 */
178 TAILQ_HEAD(disklist_head, disk); /* the disklist is a TAILQ */
179
180 /*
181 * Bad sector lists per fixed disk
182 */
183 struct disk_badsectors {
184 SLIST_ENTRY(disk_badsectors) dbs_next;
185 daddr_t dbs_min; /* min. sector number */
186 daddr_t dbs_max; /* max. sector number */
187 struct timeval dbs_failedat; /* first failure at */
188 };
189
190 struct disk_badsecinfo {
191 u_int32_t dbsi_bufsize; /* size of region pointed to */
192 u_int32_t dbsi_skip; /* how many to skip past */
193 u_int32_t dbsi_copied; /* how many got copied back */
194 u_int32_t dbsi_left; /* remaining to copy */
195 caddr_t dbsi_buffer; /* region to copy disk_badsectors to */
196 };
197
198 #ifdef _KERNEL
199 extern int disk_count; /* number of disks in global disklist */
200
201 void disk_init __P((void));
202 void disk_attach __P((struct disk *));
203 void disk_detach __P((struct disk *));
204 void disk_busy __P((struct disk *));
205 void disk_unbusy __P((struct disk *, long, int));
206 void disk_resetstat __P((struct disk *));
207 struct disk *disk_find __P((char *));
208 #endif
209
210 #endif /* _SYS_DISK_H_ */
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