[deliverable/linux.git] / include / linux / raid_class.h

/*
 * raid_class.h - a generic raid visualisation class
 *
 * Copyright (c) 2005 - James Bottomley <James.Bottomley@steeleye.com>
 *
 * This file is licensed under GPLv2
 */
#include <linux/transport_class.h>

struct raid_template {
	struct transport_container raid_attrs;
};

struct raid_function_template {
	void *cookie;
	int (*is_raid)(struct device *);
	void (*get_resync)(struct device *);
	void (*get_state)(struct device *);
};

enum raid_state {
	RAID_STATE_UNKNOWN = 0,
	RAID_STATE_ACTIVE,
	RAID_STATE_DEGRADED,
	RAID_STATE_RESYNCING,
	RAID_STATE_OFFLINE,
};

enum raid_level {
	RAID_LEVEL_UNKNOWN = 0,
	RAID_LEVEL_LINEAR,
	RAID_LEVEL_0,
	RAID_LEVEL_1,
	RAID_LEVEL_10,
	RAID_LEVEL_1E,
	RAID_LEVEL_3,
	RAID_LEVEL_4,
	RAID_LEVEL_5,
	RAID_LEVEL_50,
	RAID_LEVEL_6,
};

struct raid_data {
	struct list_head component_list;
	int component_count;
	enum raid_level level;
	enum raid_state state;
	int resync;
};

/* resync complete goes from 0 to this */
#define RAID_MAX_RESYNC		(10000)

#define DEFINE_RAID_ATTRIBUTE(type, attr)				      \
static inline void							      \
raid_set_##attr(struct raid_template *r, struct device *dev, type value) {    \
	struct device *device =						      \
		attribute_container_find_class_device(&r->raid_attrs.ac, dev);\
	struct raid_data *rd;						      \
	BUG_ON(!device);						      \
	rd = dev_get_drvdata(device);					      \
	rd->attr = value;						      \
}									      \
static inline type							      \
raid_get_##attr(struct raid_template *r, struct device *dev) {		      \
	struct device *device =						      \
		attribute_container_find_class_device(&r->raid_attrs.ac, dev);\
	struct raid_data *rd;						      \
	BUG_ON(!device);						      \
	rd = dev_get_drvdata(device);					      \
	return rd->attr;						      \
}

DEFINE_RAID_ATTRIBUTE(enum raid_level, level)
DEFINE_RAID_ATTRIBUTE(int, resync)
DEFINE_RAID_ATTRIBUTE(enum raid_state, state)
	
struct raid_template *raid_class_attach(struct raid_function_template *);
void raid_class_release(struct raid_template *);

int __must_check raid_component_add(struct raid_template *, struct device *,
				    struct device *);
Commit	Line	Data
	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