forked from mirrors/linux
34e81f7a72
Not a real RAID level, but some HBAs support JBOD in addition to the 'classical' RAID levels. Signed-off-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
84 lines
2.1 KiB
C
84 lines
2.1 KiB
C
/*
|
|
* 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,
|
|
RAID_LEVEL_JBOD,
|
|
};
|
|
|
|
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 *);
|
|
|