1 #-
2 # Copyright (c) 2010 Alexander Motin
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 #
9 # 1. Redistributions of source code must retain the above copyright
10 # notice, this list of conditions and the following disclaimer.
11 # 2. Redistributions in binary form must reproduce the above copyright
12 # notice, this list of conditions and the following disclaimer in the
13 # documentation and/or other materials provided with the distribution.
14 #
15 # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 #
26 # $FreeBSD: releng/9.1/sys/geom/raid/g_raid_md_if.m 235874 2012-05-24 02:34:03Z mav $
27
28 #include <sys/param.h>
29 #include <sys/lock.h>
30 #include <sys/malloc.h>
31 #include <sys/mutex.h>
32 #include <sys/sbuf.h>
33 #include <sys/bus.h>
34 #include <machine/bus.h>
35 #include <sys/systm.h>
36 #include <geom/geom.h>
37 #include <geom/raid/g_raid.h>
38
39 # The G_RAID metadata class interface.
40
41 INTERFACE g_raid_md;
42
43 HEADER {
44 #define G_RAID_MD_TASTE_FAIL -1
45 #define G_RAID_MD_TASTE_EXISTING 0
46 #define G_RAID_MD_TASTE_NEW 1
47 };
48
49 # Default implementations of methods.
50 CODE {
51 static int
52 g_raid_md_create_default(struct g_raid_md_object *md,
53 struct g_class *mp, struct g_geom **gp)
54 {
55
56 return (G_RAID_MD_TASTE_FAIL);
57 }
58
59 static int
60 g_raid_md_create_req_default(struct g_raid_md_object *md,
61 struct g_class *mp, struct gctl_req *req, struct g_geom **gp)
62 {
63
64 return (G_RAID_MD_CREATE(md, mp, gp));
65 }
66
67 static int
68 g_raid_md_ctl_default(struct g_raid_md_object *md,
69 struct gctl_req *req)
70 {
71
72 return (-1);
73 }
74
75 static int
76 g_raid_md_volume_event_default(struct g_raid_md_object *md,
77 struct g_raid_volume *vol, u_int event)
78 {
79
80 return (-1);
81 }
82
83 static int
84 g_raid_md_free_disk_default(struct g_raid_md_object *md,
85 struct g_raid_volume *vol)
86 {
87
88 return (0);
89 }
90
91 static int
92 g_raid_md_free_volume_default(struct g_raid_md_object *md,
93 struct g_raid_volume *vol)
94 {
95
96 return (0);
97 }
98 };
99
100 # create() - create new node from scratch.
101 METHOD int create {
102 struct g_raid_md_object *md;
103 struct g_class *mp;
104 struct g_geom **gp;
105 } DEFAULT g_raid_md_create_default;
106
107 # create_req() - create new node from scratch, with request argument.
108 METHOD int create_req {
109 struct g_raid_md_object *md;
110 struct g_class *mp;
111 struct gctl_req *req;
112 struct g_geom **gp;
113 } DEFAULT g_raid_md_create_req_default;
114
115 # taste() - taste disk and, if needed, create new node.
116 METHOD int taste {
117 struct g_raid_md_object *md;
118 struct g_class *mp;
119 struct g_consumer *cp;
120 struct g_geom **gp;
121 };
122
123 # ctl() - user-level control commands handling method.
124 METHOD int ctl {
125 struct g_raid_md_object *md;
126 struct gctl_req *req;
127 } DEFAULT g_raid_md_ctl_default;
128
129 # event() - events handling method.
130 METHOD int event {
131 struct g_raid_md_object *md;
132 struct g_raid_disk *disk;
133 u_int event;
134 };
135
136 # volume_event() - events handling method.
137 METHOD int volume_event {
138 struct g_raid_md_object *md;
139 struct g_raid_volume *vol;
140 u_int event;
141 } DEFAULT g_raid_md_volume_event_default;
142
143 # write() - metadata write method.
144 METHOD int write {
145 struct g_raid_md_object *md;
146 struct g_raid_volume *vol;
147 struct g_raid_subdisk *sd;
148 struct g_raid_disk *disk;
149 };
150
151 # fail_disk() - mark disk as failed and remove it from use.
152 METHOD int fail_disk {
153 struct g_raid_md_object *md;
154 struct g_raid_subdisk *sd;
155 struct g_raid_disk *disk;
156 };
157
158 # free_disk() - disk destructor.
159 METHOD int free_disk {
160 struct g_raid_md_object *md;
161 struct g_raid_disk *disk;
162 } DEFAULT g_raid_md_free_disk_default;
163
164 # free_volume() - volume destructor.
165 METHOD int free_volume {
166 struct g_raid_md_object *md;
167 struct g_raid_volume *vol;
168 } DEFAULT g_raid_md_free_volume_default;
169
170 # free() - destructor.
171 METHOD int free {
172 struct g_raid_md_object *md;
173 };
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