master
1/*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2004-2005 Pawel Jakub Dawidek <pjd@FreeBSD.org>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
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.
15 *
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
26 * SUCH DAMAGE.
27 */
28
29#ifndef _G_CONCAT_H_
30#define _G_CONCAT_H_
31
32#include <sys/endian.h>
33
34#define G_CONCAT_CLASS_NAME "CONCAT"
35
36#define G_CONCAT_MAGIC "GEOM::CONCAT"
37/*
38 * Version history:
39 * 1 - Initial version number.
40 * 2 - Added 'stop' command to gconcat(8).
41 * 3 - Added md_provider field to metadata and '-h' option to gconcat(8).
42 * 4 - Added md_provsize field to metadata.
43 */
44#define G_CONCAT_VERSION 4
45
46#ifdef _KERNEL
47#define G_CONCAT_TYPE_MANUAL 0
48#define G_CONCAT_TYPE_AUTOMATIC 1
49
50#define G_CONCAT_DEBUG(lvl, ...) \
51 _GEOM_DEBUG("GEOM_CONCAT", g_concat_debug, (lvl), NULL, __VA_ARGS__)
52#define G_CONCAT_LOGREQ(bp, ...) \
53 _GEOM_DEBUG("GEOM_CONCAT", g_concat_debug, 2, (bp), __VA_ARGS__)
54
55struct g_concat_disk {
56 TAILQ_ENTRY(g_concat_disk) d_next;
57 struct g_consumer *d_consumer;
58 struct g_concat_softc *d_softc;
59 off_t d_start;
60 off_t d_end;
61 int d_candelete;
62 int d_removed;
63 bool d_hardcoded;
64};
65
66struct g_concat_softc {
67 u_int sc_type; /* provider type */
68 struct g_geom *sc_geom;
69 struct g_provider *sc_provider;
70 uint32_t sc_id; /* concat unique ID */
71
72 uint16_t sc_ndisks;
73 TAILQ_HEAD(g_concat_disks, g_concat_disk) sc_disks;
74
75 struct mtx sc_completion_lock; /* synchronizes cross-boundary IOs */
76 struct sx sc_disks_lock; /* synchronizes modification of sc_disks */
77};
78#define sc_name sc_geom->name
79#endif /* _KERNEL */
80
81struct g_concat_metadata {
82 char md_magic[16]; /* Magic value. */
83 uint32_t md_version; /* Version number. */
84 char md_name[16]; /* Concat 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};
91static __inline void
92concat_metadata_encode(const struct g_concat_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}
104static __inline void
105concat_metadata_decode(const u_char *data, struct g_concat_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_CONCAT_H_ */