block: share request flush fields with elevator_private
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / include / linux / raid_class.h
blob31e1ff69efc8c700b6ab3d8ed396f37813db18a3
1 /*
2 * raid_class.h - a generic raid visualisation class
4 * Copyright (c) 2005 - James Bottomley <James.Bottomley@steeleye.com>
6 * This file is licensed under GPLv2
7 */
8 #include <linux/transport_class.h>
10 struct raid_template {
11 struct transport_container raid_attrs;
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 *);
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,
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,
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;
51 /* resync complete goes from 0 to this */
52 #define RAID_MAX_RESYNC (10000)
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; \
74 DEFINE_RAID_ATTRIBUTE(enum raid_level, level)
75 DEFINE_RAID_ATTRIBUTE(int, resync)
76 DEFINE_RAID_ATTRIBUTE(enum raid_state, state)
78 struct raid_template *raid_class_attach(struct raid_function_template *);
79 void raid_class_release(struct raid_template *);
81 int __must_check raid_component_add(struct raid_template *, struct device *,
82 struct device *);