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-rw-r--r--include/linux/raid_class.h59
1 files changed, 59 insertions, 0 deletions
diff --git a/include/linux/raid_class.h b/include/linux/raid_class.h
new file mode 100644
index 000000000000..a71123c28272
--- /dev/null
+++ b/include/linux/raid_class.h
@@ -0,0 +1,59 @@
+/*
+ */
+#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_ACTIVE = 1,
+ RAID_DEGRADED,
+ RAID_RESYNCING,
+ RAID_OFFLINE,
+};
+
+struct raid_data {
+ struct list_head component_list;
+ int component_count;
+ int level;
+ enum raid_state state;
+ int resync;
+};
+
+#define DEFINE_RAID_ATTRIBUTE(type, attr) \
+static inline void \
+raid_set_##attr(struct raid_template *r, struct device *dev, type value) { \
+ struct class_device *cdev = \
+ attribute_container_find_class_device(&r->raid_attrs.ac, dev);\
+ struct raid_data *rd; \
+ BUG_ON(!cdev); \
+ rd = class_get_devdata(cdev); \
+ rd->attr = value; \
+} \
+static inline type \
+raid_get_##attr(struct raid_template *r, struct device *dev) { \
+ struct class_device *cdev = \
+ attribute_container_find_class_device(&r->raid_attrs.ac, dev);\
+ struct raid_data *rd; \
+ BUG_ON(!cdev); \
+ rd = class_get_devdata(cdev); \
+ return rd->attr; \
+}
+
+DEFINE_RAID_ATTRIBUTE(int, 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 *);
+
+void raid_component_add(struct raid_template *, struct device *,
+ struct device *);