/*
* raid_class.h - a generic raid visualisation class
*
* Copyright (c) 2005 - James Bottomley <[email protected]>
*
* 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 *);