2 * Copyright (c) 1994 Bruce D. Evans.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
29 #ifndef _SYS_DISKSLICE_H_
30 #define _SYS_DISKSLICE_H_
33 #include <sys/types.h>
35 #include <sys/ioccom.h>
38 #define COMPATIBILITY_SLICE 0
39 #define DIOCGSLICEINFO _IOR('d', 111, struct diskslices)
40 #define DIOCSYNCSLICEINFO _IOW('d', 112, int)
42 #define WHOLE_DISK_SLICE 1
45 u_long ds_offset; /* starting sector */
46 u_long ds_size; /* number of sectors */
47 int ds_type; /* (foreign) slice type */
49 int ds_subtype; /* sub slice type */
50 u_char ds_name[16]; /* slice name */
52 struct disklabel *ds_label; /* BSD label, if any */
53 u_char ds_openmask; /* devs open */
54 u_char ds_wlabel; /* nonzero if label is writable */
58 struct cdevsw *dss_cdevsw; /* for containing device */
59 int dss_first_bsd_slice; /* COMPATIBILITY_SLICE is mapped here */
60 u_int dss_nslices; /* actual dimension of dss_slices[] */
61 u_int dss_oflags; /* copy of flags for "first" open */
62 int dss_secmult; /* block to sector multiplier */
63 int dss_secshift; /* block to sector shift (or -1) */
64 int dss_secsize; /* sector size */
66 dss_slices[MAX_SLICES]; /* actually usually less */
71 /* Flags for dsopen(). */
72 #define DSO_NOLABELS 1
73 #define DSO_ONESLICE 2
74 #define DSO_COMPATLABEL 4
76 #define dsgetlabel(dev, ssp) (ssp->dss_slices[dkslice(dev)].ds_label)
81 int dscheck __P((struct bio *bp, struct diskslices *ssp));
82 void dsclose __P((dev_t dev, int mode, struct diskslices *ssp));
83 void dsgone __P((struct diskslices **sspp));
84 int dsinit __P((dev_t dev, struct disklabel *lp,
85 struct diskslices **sspp));
86 int dsioctl __P((dev_t dev, u_long cmd, caddr_t data,
87 int flags, struct diskslices **sspp));
88 int dsisopen __P((struct diskslices *ssp));
89 struct diskslices *dsmakeslicestruct __P((int nslices, struct disklabel *lp));
90 char *dsname __P((dev_t dev, int unit, int slice, int part,
92 int dsopen __P((dev_t dev, int mode, u_int flags,
93 struct diskslices **sspp, struct disklabel *lp));
94 int dssize __P((dev_t dev, struct diskslices **sspp));
98 #endif /* !_SYS_DISKSLICE_H_ */