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f7c95ef02b
Adding support for raid transport layer. This will provide sysfs attributes containing raid level, state, and resync rate. MPT2SAS module will select RAID_ATTRS. Signed-off-by: Kashyap Desai <kashyap.desai@lsi.com> Reviewed-by: Eric Moore <eric.moore@lsi.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
84 lines
2.1 KiB
C
84 lines
2.1 KiB
C
/*
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* raid_class.h - a generic raid visualisation class
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*
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* Copyright (c) 2005 - James Bottomley <James.Bottomley@steeleye.com>
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*
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* This file is licensed under GPLv2
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*/
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#include <linux/transport_class.h>
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struct raid_template {
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struct transport_container raid_attrs;
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};
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struct raid_function_template {
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void *cookie;
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int (*is_raid)(struct device *);
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void (*get_resync)(struct device *);
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void (*get_state)(struct device *);
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};
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enum raid_state {
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RAID_STATE_UNKNOWN = 0,
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RAID_STATE_ACTIVE,
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RAID_STATE_DEGRADED,
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RAID_STATE_RESYNCING,
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RAID_STATE_OFFLINE,
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};
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enum raid_level {
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RAID_LEVEL_UNKNOWN = 0,
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RAID_LEVEL_LINEAR,
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RAID_LEVEL_0,
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RAID_LEVEL_1,
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RAID_LEVEL_10,
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RAID_LEVEL_1E,
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RAID_LEVEL_3,
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RAID_LEVEL_4,
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RAID_LEVEL_5,
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RAID_LEVEL_50,
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RAID_LEVEL_6,
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};
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struct raid_data {
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struct list_head component_list;
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int component_count;
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enum raid_level level;
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enum raid_state state;
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int resync;
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};
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/* resync complete goes from 0 to this */
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#define RAID_MAX_RESYNC (10000)
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#define DEFINE_RAID_ATTRIBUTE(type, attr) \
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static inline void \
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raid_set_##attr(struct raid_template *r, struct device *dev, type value) { \
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struct device *device = \
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attribute_container_find_class_device(&r->raid_attrs.ac, dev);\
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struct raid_data *rd; \
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BUG_ON(!device); \
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rd = dev_get_drvdata(device); \
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rd->attr = value; \
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} \
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static inline type \
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raid_get_##attr(struct raid_template *r, struct device *dev) { \
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struct device *device = \
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attribute_container_find_class_device(&r->raid_attrs.ac, dev);\
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struct raid_data *rd; \
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BUG_ON(!device); \
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rd = dev_get_drvdata(device); \
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return rd->attr; \
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}
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DEFINE_RAID_ATTRIBUTE(enum raid_level, level)
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DEFINE_RAID_ATTRIBUTE(int, resync)
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DEFINE_RAID_ATTRIBUTE(enum raid_state, state)
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struct raid_template *raid_class_attach(struct raid_function_template *);
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void raid_class_release(struct raid_template *);
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int __must_check raid_component_add(struct raid_template *, struct device *,
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struct device *);
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