netlink: fix NETLINK_RECV_NO_ENOBUFS in netlink_set_err()
[linux-2.6.git] / include / linux / raid_class.h
1 /*
2  * raid_class.h - a generic raid visualisation class
3  *
4  * Copyright (c) 2005 - James Bottomley <James.Bottomley@steeleye.com>
5  *
6  * This file is licensed under GPLv2
7  */
8 #include <linux/transport_class.h>
9
10 struct raid_template {
11         struct transport_container raid_attrs;
12 };
13
14 struct raid_function_template {
15         void *cookie;
16         int (*is_raid)(struct device *);
17         void (*get_resync)(struct device *);
18         void (*get_state)(struct device *);
19 };
20
21 enum raid_state {
22         RAID_STATE_UNKNOWN = 0,
23         RAID_STATE_ACTIVE,
24         RAID_STATE_DEGRADED,
25         RAID_STATE_RESYNCING,
26         RAID_STATE_OFFLINE,
27 };
28
29 enum raid_level {
30         RAID_LEVEL_UNKNOWN = 0,
31         RAID_LEVEL_LINEAR,
32         RAID_LEVEL_0,
33         RAID_LEVEL_1,
34         RAID_LEVEL_10,
35         RAID_LEVEL_1E,
36         RAID_LEVEL_3,
37         RAID_LEVEL_4,
38         RAID_LEVEL_5,
39         RAID_LEVEL_50,
40         RAID_LEVEL_6,
41 };
42
43 struct raid_data {
44         struct list_head component_list;
45         int component_count;
46         enum raid_level level;
47         enum raid_state state;
48         int resync;
49 };
50
51 /* resync complete goes from 0 to this */
52 #define RAID_MAX_RESYNC         (10000)
53
54 #define DEFINE_RAID_ATTRIBUTE(type, attr)                                     \
55 static inline void                                                            \
56 raid_set_##attr(struct raid_template *r, struct device *dev, type value) {    \
57         struct device *device =                                               \
58                 attribute_container_find_class_device(&r->raid_attrs.ac, dev);\
59         struct raid_data *rd;                                                 \
60         BUG_ON(!device);                                                      \
61         rd = dev_get_drvdata(device);                                         \
62         rd->attr = value;                                                     \
63 }                                                                             \
64 static inline type                                                            \
65 raid_get_##attr(struct raid_template *r, struct device *dev) {                \
66         struct device *device =                                               \
67                 attribute_container_find_class_device(&r->raid_attrs.ac, dev);\
68         struct raid_data *rd;                                                 \
69         BUG_ON(!device);                                                      \
70         rd = dev_get_drvdata(device);                                         \
71         return rd->attr;                                                      \
72 }
73
74 DEFINE_RAID_ATTRIBUTE(enum raid_level, level)
75 DEFINE_RAID_ATTRIBUTE(int, resync)
76 DEFINE_RAID_ATTRIBUTE(enum raid_state, state)
77         
78 struct raid_template *raid_class_attach(struct raid_function_template *);
79 void raid_class_release(struct raid_template *);
80
81 int __must_check raid_component_add(struct raid_template *, struct device *,
82                                     struct device *);
83