1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
|
/*-
* Copyright (c) 2004-2005 Pawel Jakub Dawidek <pjd@FreeBSD.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef _G_LABEL_H_
#define _G_LABEL_H_
#include <sys/endian.h>
#define G_LABEL_CLASS_NAME "LABEL"
#define G_LABEL_MAGIC "GEOM::LABEL"
/*
* Version history:
* 1 - Initial version number.
* 2 - Added md_provsize field to metadata.
*/
#define G_LABEL_VERSION 2
#define G_LABEL_DIR "label"
#ifdef _KERNEL
extern u_int g_label_debug;
#define G_LABEL_DEBUG(lvl, ...) do { \
if (g_label_debug >= (lvl)) { \
printf("GEOM_LABEL"); \
if (g_label_debug > 0) \
printf("[%u]", lvl); \
printf(": "); \
printf(__VA_ARGS__); \
printf("\n"); \
} \
} while (0)
typedef void g_label_taste_t (struct g_consumer *cp, char *label, size_t size);
struct g_label_desc {
g_label_taste_t *ld_taste;
char *ld_dir;
};
/* Supported labels. */
extern const struct g_label_desc g_label_ufs;
extern const struct g_label_desc g_label_iso9660;
extern const struct g_label_desc g_label_msdosfs;
extern const struct g_label_desc g_label_ext2fs;
extern const struct g_label_desc g_label_reiserfs;
extern const struct g_label_desc g_label_ntfs;
#endif /* _KERNEL */
struct g_label_metadata {
char md_magic[16]; /* Magic value. */
uint32_t md_version; /* Version number. */
char md_label[16]; /* Label. */
uint64_t md_provsize; /* Provider's size. */
};
static __inline void
label_metadata_encode(const struct g_label_metadata *md, u_char *data)
{
bcopy(md->md_magic, data, sizeof(md->md_magic));
le32enc(data + 16, md->md_version);
bcopy(md->md_label, data + 20, sizeof(md->md_label));
le64enc(data + 36, md->md_provsize);
}
static __inline void
label_metadata_decode(const u_char *data, struct g_label_metadata *md)
{
bcopy(data, md->md_magic, sizeof(md->md_magic));
md->md_version = le32dec(data + 16);
bcopy(data + 20, md->md_label, sizeof(md->md_label));
md->md_provsize = le64dec(data + 36);
}
#endif /* _G_LABEL_H_ */
|
