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James Bottomley61a7afa2005-08-16 18:27:34 -05001/*
James Bottomleyb1081ea2005-11-06 11:59:08 -06002 * 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
James Bottomley61a7afa2005-08-16 18:27:34 -05007 */
8#include <linux/transport_class.h>
9
10struct raid_template {
11 struct transport_container raid_attrs;
12};
13
14struct 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
21enum raid_state {
James Bottomleyb1081ea2005-11-06 11:59:08 -060022 RAID_STATE_UNKNOWN = 0,
23 RAID_STATE_ACTIVE,
24 RAID_STATE_DEGRADED,
25 RAID_STATE_RESYNCING,
26 RAID_STATE_OFFLINE,
27};
28
29enum raid_level {
30 RAID_LEVEL_UNKNOWN = 0,
31 RAID_LEVEL_LINEAR,
32 RAID_LEVEL_0,
33 RAID_LEVEL_1,
Moore, Eric8e32ca42006-01-04 14:58:43 -070034 RAID_LEVEL_10,
James Bottomleyb1081ea2005-11-06 11:59:08 -060035 RAID_LEVEL_3,
36 RAID_LEVEL_4,
37 RAID_LEVEL_5,
Moore, Eric8e32ca42006-01-04 14:58:43 -070038 RAID_LEVEL_50,
James Bottomleyb1081ea2005-11-06 11:59:08 -060039 RAID_LEVEL_6,
James Bottomley61a7afa2005-08-16 18:27:34 -050040};
41
42struct raid_data {
43 struct list_head component_list;
44 int component_count;
James Bottomleyb1081ea2005-11-06 11:59:08 -060045 enum raid_level level;
James Bottomley61a7afa2005-08-16 18:27:34 -050046 enum raid_state state;
47 int resync;
48};
49
James Bottomleyb1081ea2005-11-06 11:59:08 -060050/* resync complete goes from 0 to this */
51#define RAID_MAX_RESYNC (10000)
52
James Bottomley61a7afa2005-08-16 18:27:34 -050053#define DEFINE_RAID_ATTRIBUTE(type, attr) \
54static inline void \
55raid_set_##attr(struct raid_template *r, struct device *dev, type value) { \
Tony Jonesee959b02008-02-22 00:13:36 +010056 struct device *device = \
James Bottomley61a7afa2005-08-16 18:27:34 -050057 attribute_container_find_class_device(&r->raid_attrs.ac, dev);\
58 struct raid_data *rd; \
Tony Jonesee959b02008-02-22 00:13:36 +010059 BUG_ON(!device); \
60 rd = dev_get_drvdata(device); \
James Bottomley61a7afa2005-08-16 18:27:34 -050061 rd->attr = value; \
62} \
63static inline type \
64raid_get_##attr(struct raid_template *r, struct device *dev) { \
Tony Jonesee959b02008-02-22 00:13:36 +010065 struct device *device = \
James Bottomley61a7afa2005-08-16 18:27:34 -050066 attribute_container_find_class_device(&r->raid_attrs.ac, dev);\
67 struct raid_data *rd; \
Tony Jonesee959b02008-02-22 00:13:36 +010068 BUG_ON(!device); \
69 rd = dev_get_drvdata(device); \
James Bottomley61a7afa2005-08-16 18:27:34 -050070 return rd->attr; \
71}
72
James Bottomleyb1081ea2005-11-06 11:59:08 -060073DEFINE_RAID_ATTRIBUTE(enum raid_level, level)
James Bottomley61a7afa2005-08-16 18:27:34 -050074DEFINE_RAID_ATTRIBUTE(int, resync)
75DEFINE_RAID_ATTRIBUTE(enum raid_state, state)
76
77struct raid_template *raid_class_attach(struct raid_function_template *);
78void raid_class_release(struct raid_template *);
79
Jeff Garziked542be2006-10-04 07:05:11 -040080int __must_check raid_component_add(struct raid_template *, struct device *,
81 struct device *);
82