Change sendfile() to use the new m_ext callback scheme for cleaning up after
[dragonfly.git] / sys / sys / diskslice.h
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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 1.36.2.1 2001/01/29 01:50:50 ken Exp $
9e792b7e 27 * $DragonFly: src/sys/sys/diskslice.h,v 1.4 2004/03/04 01:37:57 dillon Exp $
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28 */
29
30#ifndef _SYS_DISKSLICE_H_
31#define _SYS_DISKSLICE_H_
32
33#ifndef _KERNEL
34#include <sys/types.h>
35#endif
36#include <sys/ioccom.h>
37
38#define BASE_SLICE 2
39#define COMPATIBILITY_SLICE 0
40#define DIOCGSLICEINFO _IOR('d', 111, struct diskslices)
41#define DIOCSYNCSLICEINFO _IOW('d', 112, int)
9e792b7e 42#define MAX_SLICES 16
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43#define WHOLE_DISK_SLICE 1
44
45struct diskslice {
46 u_long ds_offset; /* starting sector */
47 u_long ds_size; /* number of sectors */
48 int ds_type; /* (foreign) slice type */
49#ifdef PC98
50 int ds_subtype; /* sub slice type */
51 u_char ds_name[16]; /* slice name */
52#endif
53 struct disklabel *ds_label; /* BSD label, if any */
54 void *ds_dev; /* devfs token for raw whole slice */
55#ifdef MAXPARTITIONS /* XXX don't depend on disklabel.h */
9e792b7e 56#if MAXPARTITIONS != 16 /* but check consistency if possible */
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57#error "inconsistent MAXPARTITIONS"
58#endif
59#else
9e792b7e 60#define MAXPARTITIONS 16
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61#endif
62 void *ds_devs[MAXPARTITIONS]; /* XXX s.b. in label */
63 u_char ds_openmask; /* devs open */
64 u_char ds_wlabel; /* nonzero if label is writable */
65};
66
67struct diskslices {
68 struct cdevsw *dss_cdevsw; /* for containing device */
69 int dss_first_bsd_slice; /* COMPATIBILITY_SLICE is mapped here */
70 u_int dss_nslices; /* actual dimension of dss_slices[] */
71 u_int dss_oflags; /* copy of flags for "first" open */
72 int dss_secmult; /* block to sector multiplier */
73 int dss_secshift; /* block to sector shift (or -1) */
74 int dss_secsize; /* sector size */
75 struct diskslice
76 dss_slices[MAX_SLICES]; /* actually usually less */
77};
78
79#ifdef _KERNEL
80
81/* Flags for dsopen(). */
82#define DSO_NOLABELS 1
83#define DSO_ONESLICE 2
84#define DSO_COMPATLABEL 4
85
86#define dsgetlabel(dev, ssp) (ssp->dss_slices[dkslice(dev)].ds_label)
87
88struct buf;
89struct disklabel;
90
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91int dscheck (struct buf *bp, struct diskslices *ssp);
92void dsclose (dev_t dev, int mode, struct diskslices *ssp);
93void dsgone (struct diskslices **sspp);
94int dsinit (dev_t dev, struct disklabel *lp,
95 struct diskslices **sspp);
96int dsioctl (dev_t dev, u_long cmd, caddr_t data,
97 int flags, struct diskslices **sspp);
98int dsisopen (struct diskslices *ssp);
99struct diskslices *dsmakeslicestruct (int nslices, struct disklabel *lp);
100char *dsname (dev_t dev, int unit, int slice, int part,
101 char *partname);
102int dsopen (dev_t dev, int mode, u_int flags,
103 struct diskslices **sspp, struct disklabel *lp);
104int dssize (dev_t dev, struct diskslices **sspp);
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105
106#endif /* _KERNEL */
107
108#endif /* !_SYS_DISKSLICE_H_ */