1 | /* $NetBSD: ccdvar.h,v 1.35 2015/09/06 06:00:59 dholland Exp $ */ |
2 | |
3 | /*- |
4 | * Copyright (c) 1996, 1997, 1998, 1999, 2007, 2009 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. |
9 | * |
10 | * Redistribution and use in source and binary forms, with or without |
11 | * modification, are permitted provided that the following conditions |
12 | * are met: |
13 | * 1. Redistributions of source code must retain the above copyright |
14 | * notice, this list of conditions and the following disclaimer. |
15 | * 2. Redistributions in binary form must reproduce the above copyright |
16 | * notice, this list of conditions and the following disclaimer in the |
17 | * documentation and/or other materials provided with the distribution. |
18 | * |
19 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
20 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
21 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
22 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
23 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
24 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
25 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
26 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
27 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
28 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
29 | * POSSIBILITY OF SUCH DAMAGE. |
30 | */ |
31 | |
32 | /* |
33 | * Copyright (c) 1988 University of Utah. |
34 | * Copyright (c) 1990, 1993 |
35 | * The Regents of the University of California. All rights reserved. |
36 | * |
37 | * This code is derived from software contributed to Berkeley by |
38 | * the Systems Programming Group of the University of Utah Computer |
39 | * Science Department. |
40 | * |
41 | * Redistribution and use in source and binary forms, with or without |
42 | * modification, are permitted provided that the following conditions |
43 | * are met: |
44 | * 1. Redistributions of source code must retain the above copyright |
45 | * notice, this list of conditions and the following disclaimer. |
46 | * 2. Redistributions in binary form must reproduce the above copyright |
47 | * notice, this list of conditions and the following disclaimer in the |
48 | * documentation and/or other materials provided with the distribution. |
49 | * 3. Neither the name of the University nor the names of its contributors |
50 | * may be used to endorse or promote products derived from this software |
51 | * without specific prior written permission. |
52 | * |
53 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
54 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
55 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
56 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
57 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
58 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
59 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
60 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
61 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
62 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
63 | * SUCH DAMAGE. |
64 | * |
65 | * from: Utah $Hdr: cdvar.h 1.1 90/07/09$ |
66 | * |
67 | * @(#)cdvar.h 8.1 (Berkeley) 6/10/93 |
68 | */ |
69 | |
70 | #ifndef _DEV_CCDVAR_H_ |
71 | #define _DEV_CCDVAR_H_ |
72 | |
73 | #include <sys/buf.h> |
74 | #include <sys/ioccom.h> |
75 | #include <sys/mutex.h> |
76 | #include <sys/queue.h> |
77 | #include <sys/condvar.h> |
78 | |
79 | /* |
80 | * Dynamic configuration and disklabel support by: |
81 | * Jason R. Thorpe <thorpej@nas.nasa.gov> |
82 | * Numerical Aerodynamic Simulation Facility |
83 | * Mail Stop 258-6 |
84 | * NASA Ames Research Center |
85 | * Moffett Field, CA 94035 |
86 | */ |
87 | |
88 | /* |
89 | * This structure is used to configure a ccd via ioctl(2). |
90 | */ |
91 | struct ccd_ioctl { |
92 | char **ccio_disks; /* pointer to component paths */ |
93 | u_int ccio_ndisks; /* number of disks to concatenate */ |
94 | int ccio_ileave; /* interleave (DEV_BSIZE blocks) */ |
95 | int ccio_flags; /* see sc_flags below */ |
96 | int ccio_unit; /* unit number: use varies */ |
97 | uint64_t ccio_size; /* (returned) size of ccd */ |
98 | }; |
99 | |
100 | |
101 | /* |
102 | * Component info table. |
103 | * Describes a single component of a concatenated disk. |
104 | */ |
105 | struct ccdcinfo { |
106 | struct vnode *ci_vp; /* device's vnode */ |
107 | dev_t ci_dev; /* XXX: device's dev_t */ |
108 | uint64_t ci_size; /* size */ |
109 | char *ci_path; /* path to component */ |
110 | size_t ci_pathlen; /* length of component path */ |
111 | }; |
112 | |
113 | /* |
114 | * Interleave description table. |
115 | * Computed at boot time to speed irregular-interleave lookups. |
116 | * The idea is that we interleave in "groups". First we interleave |
117 | * evenly over all component disks up to the size of the smallest |
118 | * component (the first group), then we interleave evenly over all |
119 | * remaining disks up to the size of the next-smallest (second group), |
120 | * and so on. |
121 | * |
122 | * Each table entry describes the interleave characteristics of one |
123 | * of these groups. For example if a concatenated disk consisted of |
124 | * three components of 5, 3, and 7 DEV_BSIZE blocks interleaved at |
125 | * DEV_BSIZE (1), the table would have three entries: |
126 | * |
127 | * ndisk startblk startoff dev |
128 | * 3 0 0 0, 1, 2 |
129 | * 2 9 3 0, 2 |
130 | * 1 13 5 2 |
131 | * 0 - - - |
132 | * |
133 | * which says that the first nine blocks (0-8) are interleaved over |
134 | * 3 disks (0, 1, 2) starting at block offset 0 on any component disk, |
135 | * the next 4 blocks (9-12) are interleaved over 2 disks (0, 2) starting |
136 | * at component block 3, and the remaining blocks (13-14) are on disk |
137 | * 2 starting at offset 5. |
138 | */ |
139 | struct ccdiinfo { |
140 | int ii_ndisk; /* # of disks range is interleaved over */ |
141 | daddr_t ii_startblk; /* starting scaled block # for range */ |
142 | daddr_t ii_startoff; /* starting component offset (block #) */ |
143 | int *ii_index; /* ordered list of components in range */ |
144 | size_t ii_indexsz; /* size of memory area */ |
145 | }; |
146 | |
147 | /* |
148 | * Concatenated disk pseudo-geometry information. |
149 | */ |
150 | struct ccdgeom { |
151 | u_int32_t ccg_secsize; /* # bytes per sector */ |
152 | u_int32_t ccg_nsectors; /* # data sectors per track */ |
153 | u_int32_t ccg_ntracks; /* # tracks per cylinder */ |
154 | u_int32_t ccg_ncylinders; /* # cylinders per unit */ |
155 | }; |
156 | |
157 | struct ccdbuf; |
158 | |
159 | /* |
160 | * A concatenated disk is described after initialization by this structure. |
161 | */ |
162 | struct ccd_softc { |
163 | int sc_unit; |
164 | int sc_flags; /* flags */ |
165 | uint64_t sc_size; /* size of ccd */ |
166 | int sc_ileave; /* interleave */ |
167 | u_int sc_nccdisks; /* number of components */ |
168 | #define CCD_MAXNDISKS 65536 |
169 | struct ccdcinfo *sc_cinfo; /* component info */ |
170 | struct ccdiinfo *sc_itable; /* interleave table */ |
171 | struct ccdgeom sc_geom; /* pseudo geometry info */ |
172 | char sc_xname[8]; /* XXX external name */ |
173 | struct disk sc_dkdev; /* generic disk device info */ |
174 | kmutex_t sc_dvlock; /* lock on device node */ |
175 | struct bufq_state *sc_bufq; /* buffer queue */ |
176 | kmutex_t *sc_iolock; /* lock on I/O start/stop */ |
177 | kcondvar_t sc_stop; /* when inflight goes zero */ |
178 | struct lwp *sc_thread; /* for deferred I/O */ |
179 | kcondvar_t sc_push; /* for deferred I/O */ |
180 | bool sc_zap; /* for deferred I/O */ |
181 | LIST_ENTRY(ccd_softc) sc_link; |
182 | }; |
183 | |
184 | /* sc_flags */ |
185 | #define CCDF_UNIFORM 0x002 /* use LCCD of sizes for uniform interleave */ |
186 | #define CCDF_NOLABEL 0x004 /* ignore on-disk (raw) disklabel */ |
187 | |
188 | #define CCDF_INITED 0x010 /* unit has been initialized */ |
189 | #define CCDF_WLABEL 0x020 /* label area is writable */ |
190 | #define CCDF_LABELLING 0x040 /* unit is currently being labelled */ |
191 | #define CCDF_KLABEL 0x080 /* keep label on close */ |
192 | #define CCDF_VLABEL 0x100 /* label is valid */ |
193 | #define CCDF_RLABEL 0x200 /* currently reading label */ |
194 | |
195 | /* Mask of user-settable ccd flags. */ |
196 | #define CCDF_USERMASK (CCDF_UNIFORM|CCDF_NOLABEL) |
197 | |
198 | /* |
199 | * Before you can use a unit, it must be configured with CCDIOCSET. |
200 | * The configuration persists across opens and closes of the device; |
201 | * a CCDIOCCLR must be used to reset a configuration. An attempt to |
202 | * CCDIOCSET an already active unit will return EBUSY. Attempts to |
203 | * CCDIOCCLR an inactive unit will return ENXIO. |
204 | */ |
205 | #define CCDIOCSET _IOWR('F', 16, struct ccd_ioctl) /* enable ccd */ |
206 | #define CCDIOCCLR _IOW('F', 17, struct ccd_ioctl) /* disable ccd */ |
207 | |
208 | #if defined(COMPAT_60) && !defined(_LP64) |
209 | /* |
210 | * Old version with incorrect ccio_size |
211 | */ |
212 | struct ccd_ioctl_60 { |
213 | char **ccio_disks; /* pointer to component paths */ |
214 | u_int ccio_ndisks; /* number of disks to concatenate */ |
215 | int ccio_ileave; /* interleave (DEV_BSIZE blocks) */ |
216 | int ccio_flags; /* see sc_flags below */ |
217 | int ccio_unit; /* unit number: use varies */ |
218 | size_t ccio_size; /* (returned) size of ccd */ |
219 | }; |
220 | |
221 | #define CCDIOCSET_60 _IOWR('F', 16, struct ccd_ioctl_60) /* enable ccd */ |
222 | #define CCDIOCCLR_60 _IOW('F', 17, struct ccd_ioctl_60) /* disable ccd */ |
223 | #endif /* COMPAT_60 && !LP64*/ |
224 | /* |
225 | * Sysctl information |
226 | */ |
227 | struct ccddiskinfo { |
228 | int ccd_ileave; |
229 | u_int ccd_ndisks; |
230 | uint64_t ccd_size; |
231 | int ccd_flags; |
232 | }; |
233 | |
234 | #endif /* _DEV_CCDVAR_H_ */ |
235 | |