FreeBSD/Linux Kernel Cross Reference
sys/sys/diskslice.h
1 /*-
2 * Copyright (c) 1994 Bruce D. Evans.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: src/sys/sys/diskslice.h,v 1.16.2.1 1999/09/05 08:22:11 peter Exp $
27 */
28
29 #ifndef _SYS_DISKSLICE_H_
30 #define _SYS_DISKSLICE_H_
31
32 #ifndef KERNEL
33 #include <sys/types.h>
34 #endif
35 #include <sys/ioccom.h>
36
37 #define BASE_SLICE 2
38 #define COMPATIBILITY_SLICE 0
39 #define DIOCGSLICEINFO _IOR('d', 111, struct diskslices)
40 #define DIOCSYNCSLICEINFO _IOW('d', 112, int)
41 #define MAX_SLICES 32
42 #define WHOLE_DISK_SLICE 1
43
44 /* upcoming change from julian.. early warning of probable form */
45 #if 1
46 struct diskslice {
47 u_long ds_offset; /* starting sector */
48 u_long ds_size; /* number of sectors */
49 int ds_type; /* (foreign) slice type */
50 #ifdef PC98
51 int ds_subtype; /* sub slice type */
52 u_char ds_name[16]; /* slice name */
53 #endif
54 struct dkbad_intern *ds_bad; /* bad sector table, if any */
55 struct disklabel *ds_label; /* BSD label, if any */
56 void *ds_bdev; /* devfs token for whole slice */
57 void *ds_cdev; /* devfs token for raw whole slice */
58 #ifdef MAXPARTITIONS /* XXX don't depend on disklabel.h */
59 #if MAXPARTITIONS != 8 /* but check consistency if possible */
60 #error "inconsistent MAXPARTITIONS"
61 #endif
62 #else
63 #define MAXPARTITIONS 8
64 #endif
65 void *ds_bdevs[MAXPARTITIONS]; /* XXX s.b. in label */
66 void *ds_cdevs[MAXPARTITIONS]; /* XXX s.b. in label */
67 u_char ds_bopenmask; /* bdevs open */
68 u_char ds_copenmask; /* cdevs open */
69 u_char ds_openmask; /* [bc]devs open */
70 u_char ds_wlabel; /* nonzero if label is writable */
71 };
72
73 #else
74 /* switch table for slice handlers (sample only) */
75 struct slice_switch (
76 int (*slice_load)();
77 int (*slice_check();
78 int (*slice_gone)();
79 /*
80 * etc.
81 * each routine is called with the address of the private data
82 * and the minor number..
83 * Other arguments as needed
84 */
85 };
86
87 struct diskslice {
88 u_long ds_offset; /* starting sector */
89 u_long ds_size; /* number of sectors */
90 int ds_type; /* (foreign) slice type */
91 #ifdef PC98
92 int ds_subtype; /* sub slice type */
93 u_char ds_name[16]; /* slice name */
94 #endif
95 struct dkbad_intern *ds_bad; /* bad sector table, if any */
96 void *ds_date; /* Slice type specific data */
97 struct slice_switch *switch; /* switch table for type handler */
98 u_char ds_bopenmask; /* bdevs open */
99 u_char ds_copenmask; /* cdevs open */
100 u_char ds_openmask; /* [bc]devs open */
101 u_char ds_wlabel; /* nonzero if label is writable */
102 };
103 #endif
104
105 struct diskslices {
106 struct bdevsw *dss_bdevsw; /* for containing device */
107 struct cdevsw *dss_cdevsw; /* for containing device */
108 int dss_first_bsd_slice; /* COMPATIBILITY_SLICE is mapped here */
109 u_int dss_nslices; /* actual dimension of dss_slices[] */
110 struct diskslice
111 dss_slices[MAX_SLICES]; /* actually usually less */
112 };
113
114 #ifdef KERNEL
115
116 #define dsgetbad(dev, ssp) (ssp->dss_slices[dkslice(dev)].ds_bad)
117 #define dsgetlabel(dev, ssp) (ssp->dss_slices[dkslice(dev)].ds_label)
118
119 struct buf;
120 struct disklabel;
121
122 typedef int ds_setgeom_t __P((struct disklabel *lp));
123
124 int dscheck __P((struct buf *bp, struct diskslices *ssp));
125 void dsclose __P((dev_t dev, int mode, struct diskslices *ssp));
126 void dsgone __P((struct diskslices **sspp));
127 int dsinit __P((char *dname, dev_t dev, void (*strat)(struct buf *bp),
128 struct disklabel *lp, struct diskslices **sspp));
129 int dsioctl __P((char *dname, dev_t dev, int cmd, caddr_t data, int flags,
130 struct diskslices **sspp, void (*strat)(struct buf *bp),
131 ds_setgeom_t *setgeom));
132 int dsisopen __P((struct diskslices *ssp));
133 char *dsname __P((char *dname, int unit, int slice, int part,
134 char *partname));
135 int dsopen __P((char *dname, dev_t dev, int mode, struct diskslices **sspp,
136 struct disklabel *lp, void (*strat)(struct buf *bp),
137 ds_setgeom_t *setgeom, struct bdevsw *bdevsw,
138 struct cdevsw *cdevsw));
139 int dssize __P((dev_t dev, struct diskslices **sspp,
140 int (*dopen)(dev_t dev, int oflags, int devtype,
141 struct proc *p),
142 int (*dclose)(dev_t dev, int fflag, int devtype,
143 struct proc *p)));
144
145 #endif /* KERNEL */
146
147 #endif /* !_SYS_DISKSLICE_H_ */
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