1 /* 2 * raid_class.h - a generic raid visualisation class 3 * 4 * Copyright (c) 2005 - James Bottomley <[email protected]> 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_3, 35 RAID_LEVEL_4, 36 RAID_LEVEL_5, 37 RAID_LEVEL_6, 38 }; 39 40 struct raid_data { 41 struct list_head component_list; 42 int component_count; 43 enum raid_level level; 44 enum raid_state state; 45 int resync; 46 }; 47 48 /* resync complete goes from 0 to this */ 49 #define RAID_MAX_RESYNC (10000) 50 51 #define DEFINE_RAID_ATTRIBUTE(type, attr) \ 52 static inline void \ 53 raid_set_##attr(struct raid_template *r, struct device *dev, type value) { \ 54 struct class_device *cdev = \ 55 attribute_container_find_class_device(&r->raid_attrs.ac, dev);\ 56 struct raid_data *rd; \ 57 BUG_ON(!cdev); \ 58 rd = class_get_devdata(cdev); \ 59 rd->attr = value; \ 60 } \ 61 static inline type \ 62 raid_get_##attr(struct raid_template *r, struct device *dev) { \ 63 struct class_device *cdev = \ 64 attribute_container_find_class_device(&r->raid_attrs.ac, dev);\ 65 struct raid_data *rd; \ 66 BUG_ON(!cdev); \ 67 rd = class_get_devdata(cdev); \ 68 return rd->attr; \ 69 } 70 71 DEFINE_RAID_ATTRIBUTE(enum raid_level, level) 72 DEFINE_RAID_ATTRIBUTE(int, resync) 73 DEFINE_RAID_ATTRIBUTE(enum raid_state, state) 74 75 struct raid_template *raid_class_attach(struct raid_function_template *); 76 void raid_class_release(struct raid_template *); 77 78 void raid_component_add(struct raid_template *, struct device *, 79 struct device *); 80