]> CyberLeo.Net >> Repos - FreeBSD/releng/10.0.git/blob - sys/geom/shsec/g_shsec.h
- Copy stable/10 (r259064) to releng/10.0 as part of the
[FreeBSD/releng/10.0.git] / sys / geom / shsec / g_shsec.h
1 /*-
2  * Copyright (c) 2005 Pawel Jakub Dawidek <pjd@FreeBSD.org>
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 AUTHORS 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 AUTHORS 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  * $FreeBSD$
27  */
28
29 #ifndef _G_SHSEC_H_
30 #define _G_SHSEC_H_
31
32 #include <sys/endian.h>
33
34 #define G_SHSEC_CLASS_NAME      "SHSEC"
35
36 #define G_SHSEC_MAGIC           "GEOM::SHSEC"
37 /*
38  * Version history:
39  * 0 - Initial version number.
40  * 1 - Added md_provsize field to metadata.
41  */
42 #define G_SHSEC_VERSION 1
43
44 #ifdef _KERNEL
45 #define G_SHSEC_BFLAG_FIRST     0x1
46
47 #define G_SHSEC_DEBUG(lvl, ...) do {                                    \
48         if (g_shsec_debug >= (lvl)) {                                   \
49                 printf("GEOM_SHSEC");                                   \
50                 if (g_shsec_debug > 0)                                  \
51                         printf("[%u]", lvl);                            \
52                 printf(": ");                                           \
53                 printf(__VA_ARGS__);                                    \
54                 printf("\n");                                           \
55         }                                                               \
56 } while (0)
57 #define G_SHSEC_LOGREQ(lvl, bp, ...)    do {                            \
58         if (g_shsec_debug >= (lvl)) {                                   \
59                 printf("GEOM_SHSEC");                                   \
60                 if (g_shsec_debug > 0)                                  \
61                         printf("[%u]", lvl);                            \
62                 printf(": ");                                           \
63                 printf(__VA_ARGS__);                                    \
64                 printf(" ");                                            \
65                 g_print_bio(bp);                                        \
66                 printf("\n");                                           \
67         }                                                               \
68 } while (0)
69
70 struct g_shsec_softc {
71         u_int            sc_type;       /* provider type */
72         struct g_geom   *sc_geom;
73         struct g_provider *sc_provider;
74         uint32_t         sc_id;         /* device unique ID */
75         struct g_consumer **sc_disks;
76         uint16_t         sc_ndisks;
77 };
78 #define sc_name sc_geom->name
79 #endif  /* _KERNEL */
80
81 struct g_shsec_metadata {
82         char            md_magic[16];   /* Magic value. */
83         uint32_t        md_version;     /* Version number. */
84         char            md_name[16];    /* Stripe name. */
85         uint32_t        md_id;          /* Unique ID. */
86         uint16_t        md_no;          /* Disk number. */
87         uint16_t        md_all;         /* Number of all disks. */
88         char            md_provider[16]; /* Hardcoded provider. */
89         uint64_t        md_provsize;    /* Provider's size. */
90 };
91 static __inline void
92 shsec_metadata_encode(const struct g_shsec_metadata *md, u_char *data)
93 {
94
95         bcopy(md->md_magic, data, sizeof(md->md_magic));
96         le32enc(data + 16, md->md_version);
97         bcopy(md->md_name, data + 20, sizeof(md->md_name));
98         le32enc(data + 36, md->md_id);
99         le16enc(data + 40, md->md_no);
100         le16enc(data + 42, md->md_all);
101         bcopy(md->md_provider, data + 44, sizeof(md->md_provider));
102         le64enc(data + 60, md->md_provsize);
103 }
104 static __inline void
105 shsec_metadata_decode(const u_char *data, struct g_shsec_metadata *md)
106 {
107
108         bcopy(data, md->md_magic, sizeof(md->md_magic));
109         md->md_version = le32dec(data + 16);
110         bcopy(data + 20, md->md_name, sizeof(md->md_name));
111         md->md_id = le32dec(data + 36);
112         md->md_no = le16dec(data + 40);
113         md->md_all = le16dec(data + 42);
114         bcopy(data + 44, md->md_provider, sizeof(md->md_provider));
115         md->md_provsize = le64dec(data + 60);
116 }
117 #endif  /* _G_SHSEC_H_ */