1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * raid_class.h - a generic raid visualisation class 4 * 5 * Copyright (c) 2005 - James Bottomley <James.Bottomley@steeleye.com> 6 */ 7 #include <linux/transport_class.h> 8 9 struct raid_template { 10 struct transport_container raid_attrs; 11 }; 12 13 struct raid_function_template { 14 void *cookie; 15 int (*is_raid)(struct device *); 16 void (*get_resync)(struct device *); 17 void (*get_state)(struct device *); 18 }; 19 20 enum raid_state { 21 RAID_STATE_UNKNOWN = 0, 22 RAID_STATE_ACTIVE, 23 RAID_STATE_DEGRADED, 24 RAID_STATE_RESYNCING, 25 RAID_STATE_OFFLINE, 26 }; 27 28 enum raid_level { 29 RAID_LEVEL_UNKNOWN = 0, 30 RAID_LEVEL_LINEAR, 31 RAID_LEVEL_0, 32 RAID_LEVEL_1, 33 RAID_LEVEL_10, 34 RAID_LEVEL_1E, 35 RAID_LEVEL_3, 36 RAID_LEVEL_4, 37 RAID_LEVEL_5, 38 RAID_LEVEL_50, 39 RAID_LEVEL_6, 40 RAID_LEVEL_JBOD, 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