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
211
212
213
214
215
216
217
218
219
220
221
222
223
|
/* $NetBSD: ccdvar.h,v 1.37 2018/03/18 20:33:52 christos Exp $ */
/*-
* Copyright (c) 1996, 1997, 1998, 1999, 2007, 2009 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe.
*
* 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.
*
* 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) 1988 University of Utah.
* Copyright (c) 1990, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* the Systems Programming Group of the University of Utah Computer
* Science Department.
*
* 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: Utah $Hdr: cdvar.h 1.1 90/07/09$
*
* @(#)cdvar.h 8.1 (Berkeley) 6/10/93
*/
#ifndef _DEV_CCDVAR_H_
#define _DEV_CCDVAR_H_
#include <sys/ioccom.h>
#ifdef _KERNEL
#include <sys/buf.h>
#include <sys/mutex.h>
#include <sys/queue.h>
#include <sys/condvar.h>
#endif
/*
* Dynamic configuration and disklabel support by:
* Jason R. Thorpe <thorpej@nas.nasa.gov>
* Numerical Aerodynamic Simulation Facility
* Mail Stop 258-6
* NASA Ames Research Center
* Moffett Field, CA 94035
*/
/*
* This structure is used to configure a ccd via ioctl(2).
*/
struct ccd_ioctl {
char **ccio_disks; /* pointer to component paths */
u_int ccio_ndisks; /* number of disks to concatenate */
int ccio_ileave; /* interleave (DEV_BSIZE blocks) */
int ccio_flags; /* see sc_flags below */
int ccio_unit; /* unit number: use varies */
uint64_t ccio_size; /* (returned) size of ccd */
};
#ifdef _KERNEL
/*
* Component info table.
* Describes a single component of a concatenated disk.
*/
struct ccdcinfo {
struct vnode *ci_vp; /* device's vnode */
dev_t ci_dev; /* XXX: device's dev_t */
uint64_t ci_size; /* size */
char *ci_path; /* path to component */
size_t ci_pathlen; /* length of component path */
};
/*
* Interleave description table.
* Computed at boot time to speed irregular-interleave lookups.
* The idea is that we interleave in "groups". First we interleave
* evenly over all component disks up to the size of the smallest
* component (the first group), then we interleave evenly over all
* remaining disks up to the size of the next-smallest (second group),
* and so on.
*
* Each table entry describes the interleave characteristics of one
* of these groups. For example if a concatenated disk consisted of
* three components of 5, 3, and 7 DEV_BSIZE blocks interleaved at
* DEV_BSIZE (1), the table would have three entries:
*
* ndisk startblk startoff dev
* 3 0 0 0, 1, 2
* 2 9 3 0, 2
* 1 13 5 2
* 0 - - -
*
* which says that the first nine blocks (0-8) are interleaved over
* 3 disks (0, 1, 2) starting at block offset 0 on any component disk,
* the next 4 blocks (9-12) are interleaved over 2 disks (0, 2) starting
* at component block 3, and the remaining blocks (13-14) are on disk
* 2 starting at offset 5.
*/
struct ccdiinfo {
int ii_ndisk; /* # of disks range is interleaved over */
daddr_t ii_startblk; /* starting scaled block # for range */
daddr_t ii_startoff; /* starting component offset (block #) */
int *ii_index; /* ordered list of components in range */
size_t ii_indexsz; /* size of memory area */
};
/*
* Concatenated disk pseudo-geometry information.
*/
struct ccdgeom {
u_int32_t ccg_secsize; /* # bytes per sector */
u_int32_t ccg_nsectors; /* # data sectors per track */
u_int32_t ccg_ntracks; /* # tracks per cylinder */
u_int32_t ccg_ncylinders; /* # cylinders per unit */
};
struct ccdbuf;
/*
* A concatenated disk is described after initialization by this structure.
*/
struct ccd_softc {
int sc_unit;
int sc_flags; /* flags */
uint64_t sc_size; /* size of ccd */
int sc_ileave; /* interleave */
u_int sc_nccdisks; /* number of components */
#define CCD_MAXNDISKS 65536
struct ccdcinfo *sc_cinfo; /* component info */
struct ccdiinfo *sc_itable; /* interleave table */
struct ccdgeom sc_geom; /* pseudo geometry info */
char sc_xname[8]; /* XXX external name */
struct disk sc_dkdev; /* generic disk device info */
kmutex_t sc_dvlock; /* lock on device node */
struct bufq_state *sc_bufq; /* buffer queue */
kmutex_t *sc_iolock; /* lock on I/O start/stop */
kcondvar_t sc_stop; /* when inflight goes zero */
struct lwp *sc_thread; /* for deferred I/O */
kcondvar_t sc_push; /* for deferred I/O */
bool sc_zap; /* for deferred I/O */
LIST_ENTRY(ccd_softc) sc_link;
};
#endif /* _KERNEL */
/* sc_flags */
#define CCDF_UNIFORM 0x002 /* use LCCD of sizes for uniform interleave */
#define CCDF_NOLABEL 0x004 /* ignore on-disk (raw) disklabel */
#define CCDF_INITED 0x010 /* unit has been initialized */
#define CCDF_WLABEL 0x020 /* label area is writable */
#define CCDF_LABELLING 0x040 /* unit is currently being labelled */
#define CCDF_KLABEL 0x080 /* keep label on close */
#define CCDF_VLABEL 0x100 /* label is valid */
#define CCDF_RLABEL 0x200 /* currently reading label */
/* Mask of user-settable ccd flags. */
#define CCDF_USERMASK (CCDF_UNIFORM|CCDF_NOLABEL)
/*
* Before you can use a unit, it must be configured with CCDIOCSET.
* The configuration persists across opens and closes of the device;
* a CCDIOCCLR must be used to reset a configuration. An attempt to
* CCDIOCSET an already active unit will return EBUSY. Attempts to
* CCDIOCCLR an inactive unit will return ENXIO.
*/
#define CCDIOCSET _IOWR('F', 16, struct ccd_ioctl) /* enable ccd */
#define CCDIOCCLR _IOW('F', 17, struct ccd_ioctl) /* disable ccd */
/*
* Sysctl information
*/
struct ccddiskinfo {
int ccd_ileave;
u_int ccd_ndisks;
uint64_t ccd_size;
int ccd_flags;
};
#endif /* _DEV_CCDVAR_H_ */
|
