2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2004-2005 Pawel Jakub Dawidek <pjd@FreeBSD.org>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 #include <sys/endian.h>
36 #include <sys/sysctl.h>
39 #define G_LABEL_CLASS_NAME "LABEL"
41 #define G_LABEL_MAGIC "GEOM::LABEL"
44 * 1 - Initial version number.
45 * 2 - Added md_provsize field to metadata.
47 #define G_LABEL_VERSION 2
48 #define G_LABEL_DIR "label"
51 extern u_int g_label_debug;
53 #define G_LABEL_DEBUG(lvl, ...) \
54 _GEOM_DEBUG("GEOM_LABEL", g_label_debug, (lvl), NULL, __VA_ARGS__)
56 SYSCTL_DECL(_kern_geom_label);
58 #define G_LABEL_INIT(kind, label, descr) \
59 SYSCTL_NODE(_kern_geom_label, OID_AUTO, kind, CTLFLAG_RD, \
61 SYSCTL_INT(_kern_geom_label_##kind, OID_AUTO, enable, \
62 CTLFLAG_RWTUN, &label.ld_enabled, 1, descr)
64 typedef void g_label_taste_t (struct g_consumer *cp, char *label, size_t size);
67 g_label_taste_t *ld_taste;
72 /* Supported labels. */
73 extern struct g_label_desc g_label_ufs_id;
74 extern struct g_label_desc g_label_ufs_volume;
75 extern struct g_label_desc g_label_iso9660;
76 extern struct g_label_desc g_label_msdosfs;
77 extern struct g_label_desc g_label_ext2fs;
78 extern struct g_label_desc g_label_reiserfs;
79 extern struct g_label_desc g_label_ntfs;
80 extern struct g_label_desc g_label_gpt;
81 extern struct g_label_desc g_label_gpt_uuid;
82 extern struct g_label_desc g_label_disk_ident;
83 extern struct g_label_desc g_label_flashmap;
85 extern void g_label_rtrim(char *label, size_t size);
88 struct g_label_metadata {
89 char md_magic[16]; /* Magic value. */
90 uint32_t md_version; /* Version number. */
91 char md_label[16]; /* Label. */
92 uint64_t md_provsize; /* Provider's size. */
95 label_metadata_encode(const struct g_label_metadata *md, u_char *data)
98 bcopy(md->md_magic, data, sizeof(md->md_magic));
99 le32enc(data + 16, md->md_version);
100 bcopy(md->md_label, data + 20, sizeof(md->md_label));
101 le64enc(data + 36, md->md_provsize);
104 label_metadata_decode(const u_char *data, struct g_label_metadata *md)
107 bcopy(data, md->md_magic, sizeof(md->md_magic));
108 md->md_version = le32dec(data + 16);
109 bcopy(data + 20, md->md_label, sizeof(md->md_label));
110 md->md_provsize = le64dec(data + 36);
112 #endif /* _G_LABEL_H_ */