Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / include / linux / raid_class.h

diff --git a/kernel/include/linux/raid_class.h b/kernel/include/linux/raid_class.h
new file mode 100644 (file)
index 0000000..31e1ff6
--- /dev/null
+++ b/kernel/include/linux/raid_class.h
@@ -0,0 +1,83 @@
+/*
+ * raid_class.h - a generic raid visualisation class
+ *
+ * Copyright (c) 2005 - James Bottomley <James.Bottomley@steeleye.com>
+ *
+ * This file is licensed under GPLv2
+ */
+#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_STATE_UNKNOWN = 0,
+       RAID_STATE_ACTIVE,
+       RAID_STATE_DEGRADED,
+       RAID_STATE_RESYNCING,
+       RAID_STATE_OFFLINE,
+};
+
+enum raid_level {
+       RAID_LEVEL_UNKNOWN = 0,
+       RAID_LEVEL_LINEAR,
+       RAID_LEVEL_0,
+       RAID_LEVEL_1,
+       RAID_LEVEL_10,
+       RAID_LEVEL_1E,
+       RAID_LEVEL_3,
+       RAID_LEVEL_4,
+       RAID_LEVEL_5,
+       RAID_LEVEL_50,
+       RAID_LEVEL_6,
+};
+
+struct raid_data {
+       struct list_head component_list;
+       int component_count;
+       enum raid_level level;
+       enum raid_state state;
+       int resync;
+};
+
+/* resync complete goes from 0 to this */
+#define RAID_MAX_RESYNC                (10000)
+
+#define DEFINE_RAID_ATTRIBUTE(type, attr)                                    \
+static inline void                                                           \
+raid_set_##attr(struct raid_template *r, struct device *dev, type value) {    \
+       struct device *device =                                               \
+               attribute_container_find_class_device(&r->raid_attrs.ac, dev);\
+       struct raid_data *rd;                                                 \
+       BUG_ON(!device);                                                      \
+       rd = dev_get_drvdata(device);                                         \
+       rd->attr = value;                                                     \
+}                                                                            \
+static inline type                                                           \
+raid_get_##attr(struct raid_template *r, struct device *dev) {               \
+       struct device *device =                                               \
+               attribute_container_find_class_device(&r->raid_attrs.ac, dev);\
+       struct raid_data *rd;                                                 \
+       BUG_ON(!device);                                                      \
+       rd = dev_get_drvdata(device);                                         \
+       return rd->attr;                                                      \
+}
+
+DEFINE_RAID_ATTRIBUTE(enum raid_level, 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 *);
+
+int __must_check raid_component_add(struct raid_template *, struct device *,
+                                   struct device *);
+