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Commit 6ecec745 authored by Keith Busch's avatar Keith Busch Committed by Matthew Wilcox
Browse files

NVMe: Define SMART log 



This data structure is defined in the NVMe specification.  It's not used
by the kernel, but is available for use by userspace software.

Signed-off-by: default avatarKeith Busch <keith.busch@intel.com>
Signed-off-by: default avatarMatthew Wilcox <matthew.r.wilcox@intel.com>
parent 08df1e05

drivers/block/nvme.c

+1 −0
Original line number Diff line number Diff line
@@ -135,6 +135,7 @@ static inline void _nvme_check_size(void) 
	BUILD_BUG_ON(sizeof(struct nvme_id_ctrl) != 4096);

	BUILD_BUG_ON(sizeof(struct nvme_id_ns) != 4096);

	BUILD_BUG_ON(sizeof(struct nvme_lba_range_type) != 64);

	BUILD_BUG_ON(sizeof(struct nvme_smart_log) != 512);

}



typedef void (*nvme_completion_fn)(struct nvme_dev *, void *,

include/linux/nvme.h

+28 −0
Original line number Diff line number Diff line
@@ -137,6 +137,34 @@ enum { 
	NVME_LBAF_RP_DEGRADED	= 3,

};



struct nvme_smart_log {

	__u8			critical_warning;

	__u8			temperature[2];

	__u8			avail_spare;

	__u8			spare_thresh;

	__u8			percent_used;

	__u8			rsvd6[26];

	__u8			data_units_read[16];

	__u8			data_units_written[16];

	__u8			host_reads[16];

	__u8			host_writes[16];

	__u8			ctrl_busy_time[16];

	__u8			power_cycles[16];

	__u8			power_on_hours[16];

	__u8			unsafe_shutdowns[16];

	__u8			media_errors[16];

	__u8			num_err_log_entries[16];

	__u8			rsvd192[320];

};



enum {

	NVME_SMART_CRIT_SPARE		= 1 << 0,

	NVME_SMART_CRIT_TEMPERATURE	= 1 << 1,

	NVME_SMART_CRIT_RELIABILITY	= 1 << 2,

	NVME_SMART_CRIT_MEDIA		= 1 << 3,

	NVME_SMART_CRIT_VOLATILE_MEMORY	= 1 << 4,

};



struct nvme_lba_range_type {

	__u8			type;

	__u8			attributes;