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 RAID_LEVEL_JBOD, 42 }; 43 44 struct raid_data { 45 struct list_head component_list; 46 int component_count; 47 enum raid_level level; 48 enum raid_state state; 49 int resync; 50 }; 51 52 /* resync complete goes from 0 to this */ 53 #define RAID_MAX_RESYNC (10000) 54 55 #define DEFINE_RAID_ATTRIBUTE(type, attr) \ 56 static inline void \ 57 raid_set_##attr(struct raid_template *r, struct device *dev, type value) { \ 58 struct device *device = \ 59 attribute_container_find_class_device(&r->raid_attrs.ac, dev);\ 60 struct raid_data *rd; \ 61 BUG_ON(!device); \ 62 rd = dev_get_drvdata(device); \ 63 rd->attr = value; \ 64 } \ 65 static inline type \ 66 raid_get_##attr(struct raid_template *r, struct device *dev) { \ 67 struct device *device = \ 68 attribute_container_find_class_device(&r->raid_attrs.ac, dev);\ 69 struct raid_data *rd; \ 70 BUG_ON(!device); \ 71 rd = dev_get_drvdata(device); \ 72 return rd->attr; \ 73 } 74 75 DEFINE_RAID_ATTRIBUTE(enum raid_level, level) 76 DEFINE_RAID_ATTRIBUTE(int, resync) 77 DEFINE_RAID_ATTRIBUTE(enum raid_state, state) 78 79 struct raid_template *raid_class_attach(struct raid_function_template *); 80 void raid_class_release(struct raid_template *); 81 82 int __must_check raid_component_add(struct raid_template *, struct device *, 83 struct device *); 84 85