/*

 * 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_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 *);