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
26 * $FreeBSD: src/sys/sys/diskslice.h,v 1.36.2.1 2001/01/29 01:50:50 ken Exp $
27 * $DragonFly: src/sys/sys/diskslice.h,v 1.7 2006/05/20 02:42:13 dillon Exp $
30 #ifndef _SYS_DISKSLICE_H_
31 #define _SYS_DISKSLICE_H_
34 #include <sys/types.h>
36 #ifndef _SYS_IOCCOM_H_
37 #include <sys/ioccom.h>
41 #define COMPATIBILITY_SLICE 0
42 #define DIOCGSLICEINFO _IOR('d', 111, struct diskslices)
43 #define DIOCSYNCSLICEINFO _IOW('d', 112, int)
45 #define WHOLE_DISK_SLICE 1
48 u_long ds_offset; /* starting sector */
49 u_long ds_size; /* number of sectors */
50 int ds_type; /* (foreign) slice type */
51 struct disklabel *ds_label; /* BSD label, if any */
52 void *ds_dev; /* devfs token for raw whole slice */
53 #ifdef MAXPARTITIONS /* XXX don't depend on disklabel.h */
54 #if MAXPARTITIONS != 16 /* but check consistency if possible */
55 #error "inconsistent MAXPARTITIONS"
58 #define MAXPARTITIONS 16
60 void *ds_devs[MAXPARTITIONS]; /* XXX s.b. in label */
61 u_char ds_openmask; /* devs open */
62 u_char ds_wlabel; /* nonzero if label is writable */
66 struct cdevsw *dss_cdevsw; /* for containing device */
67 int dss_first_bsd_slice; /* COMPATIBILITY_SLICE is mapped here */
68 u_int dss_nslices; /* actual dimension of dss_slices[] */
69 u_int dss_oflags; /* copy of flags for "first" open */
70 int dss_secmult; /* block to sector multiplier */
71 int dss_secshift; /* block to sector shift (or -1) */
72 int dss_secsize; /* sector size */
74 dss_slices[MAX_SLICES]; /* actually usually less */
79 /* Flags for dsopen(). */
80 #define DSO_NOLABELS 1
81 #define DSO_ONESLICE 2
82 #define DSO_COMPATLABEL 4
84 #define dsgetlabel(dev, ssp) (ssp->dss_slices[dkslice(dev)].ds_label)
90 struct bio *dscheck (dev_t dev, struct bio *bio, struct diskslices *ssp);
91 void dsclose (dev_t dev, int mode, struct diskslices *ssp);
92 void dsgone (struct diskslices **sspp);
93 int dsinit (dev_t dev, struct disklabel *lp,
94 struct diskslices **sspp);
95 int dsioctl (dev_t dev, u_long cmd, caddr_t data,
96 int flags, struct diskslices **sspp);
97 int dsisopen (struct diskslices *ssp);
98 struct diskslices *dsmakeslicestruct (int nslices, struct disklabel *lp);
99 char *dsname (dev_t dev, int unit, int slice, int part,
101 int dsopen (dev_t dev, int mode, u_int flags,
102 struct diskslices **sspp, struct disklabel *lp);
103 int dssize (dev_t dev, struct diskslices **sspp);
107 #endif /* !_SYS_DISKSLICE_H_ */