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 * $FreeBSD$
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 struct diskslice {
45 u_long ds_offset; /* starting sector */
46 u_long ds_size; /* number of sectors */
47 int ds_type; /* (foreign) slice type */
48 #ifdef PC98
49 int ds_subtype; /* sub slice type */
50 u_char ds_name[16]; /* slice name */
51 #endif
52 struct dkbad_intern *ds_bad; /* bad sector table, if any */
53 struct disklabel *ds_label; /* BSD label, if any */
54 void *ds_bdev; /* devfs token for whole slice */
55 void *ds_cdev; /* devfs token for raw whole slice */
56 #ifdef MAXPARTITIONS /* XXX don't depend on disklabel.h */
57 #if MAXPARTITIONS != 8 /* but check consistency if possible */
58 #error "inconsistent MAXPARTITIONS"
59 #endif
60 #else
61 #define MAXPARTITIONS 8
62 #endif
63 void *ds_bdevs[MAXPARTITIONS]; /* XXX s.b. in label */
64 void *ds_cdevs[MAXPARTITIONS]; /* XXX s.b. in label */
65 u_char ds_bopenmask; /* bdevs open */
66 u_char ds_copenmask; /* cdevs open */
67 u_char ds_openmask; /* [bc]devs open */
68 u_char ds_wlabel; /* nonzero if label is writable */
69 };
70
71 struct diskslices {
72 struct cdevsw *dss_cdevsw; /* for containing device */
73 int dss_first_bsd_slice; /* COMPATIBILITY_SLICE is mapped here */
74 u_int dss_nslices; /* actual dimension of dss_slices[] */
75 u_int dss_oflags; /* copy of flags for "first" open */
76 int dss_secmult; /* block to sector multiplier */
77 int dss_secshift; /* block to sector shift (or -1) */
78 int dss_secsize; /* sector size */
79 struct diskslice
80 dss_slices[MAX_SLICES]; /* actually usually less */
81 };
82
83 #ifdef KERNEL
84
85 /* Flags for dsopen(). */
86 #define DSO_NOLABELS 1
87 #define DSO_ONESLICE 2
88
89 #define dsgetbad(dev, ssp) (ssp->dss_slices[dkslice(dev)].ds_bad)
90 #define dsgetlabel(dev, ssp) (ssp->dss_slices[dkslice(dev)].ds_label)
91
92 struct buf;
93 struct disklabel;
94
95 typedef int ds_setgeom_t __P((struct disklabel *lp));
96
97 int dscheck __P((struct buf *bp, struct diskslices *ssp));
98 void dsclose __P((dev_t dev, int mode, struct diskslices *ssp));
99 void dsgone __P((struct diskslices **sspp));
100 int dsinit __P((char *dname, dev_t dev, void (*strat)(struct buf *bp),
101 struct disklabel *lp, struct diskslices **sspp));
102 int dsioctl __P((char *dname, dev_t dev, u_long cmd, caddr_t data,
103 int flags, struct diskslices **sspp,
104 void (*strat)(struct buf *bp), ds_setgeom_t *setgeom));
105 int dsisopen __P((struct diskslices *ssp));
106 struct diskslices *dsmakeslicestruct __P((int nslices, struct disklabel *lp));
107 char *dsname __P((char *dname, int unit, int slice, int part,
108 char *partname));
109 int dsopen __P((char *dname, dev_t dev, int mode, u_int flags,
110 struct diskslices **sspp, struct disklabel *lp,
111 void (*strat)(struct buf *bp), ds_setgeom_t *setgeom,
112 struct cdevsw *cdevsw));
113 int dssize __P((dev_t dev, struct diskslices **sspp,
114 int (*dopen)(dev_t dev, int oflags, int devtype,
115 struct proc *p),
116 int (*dclose)(dev_t dev, int fflag, int devtype,
117 struct proc *p)));
118
119 #endif /* KERNEL */
120
121 #endif /* !_SYS_DISKSLICE_H_ */
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