/*

   * 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 class_device *cdev =					      \
  		attribute_container_find_class_device(&r->raid_attrs.ac, dev);\
  	struct raid_data *rd;						      \
  	BUG_ON(!cdev);							      \
  	rd = class_get_devdata(cdev);					      \
  	rd->attr = value;						      \
  }									      \
  static inline type							      \
  raid_get_##attr(struct raid_template *r, struct device *dev) {		      \
  	struct class_device *cdev =					      \
  		attribute_container_find_class_device(&r->raid_attrs.ac, dev);\
  	struct raid_data *rd;						      \
  	BUG_ON(!cdev);							      \
  	rd = class_get_devdata(cdev);					      \
  	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 *);