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TOMOYO Linux Cross Reference
Linux/include/linux/raid_class.h

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  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 
 84 

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