Commit 696ece75 authored by Chaitanya Kulkarni's avatar Chaitanya Kulkarni Committed by Christoph Hellwig
Browse files

nvmet: add async event tracing support 



This adds a new tracepoint for the target to trace async event. This is
helpful in debugging and comparing host and target side async events
especially when host is connected to different targets on different
machines and now that we rely on userspace components to generate AEN. 

Signed-off-by: default avatarChaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
Reviewed-by: default avatarSagi Grimberg <sagi@grimberg.me>
Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
parent ec0862ac

drivers/nvme/target/core.c

+1 −0
Original line number Diff line number Diff line
@@ -151,6 +151,7 @@ static void nvmet_async_events_process(struct nvmet_ctrl *ctrl, u16 status) 
		kfree(aen);



		mutex_unlock(&ctrl->lock);

		trace_nvmet_async_event(ctrl, req->cqe->result.u32);

		nvmet_req_complete(req, status);

	}

}

drivers/nvme/target/trace.h

+28 −0
Original line number Diff line number Diff line
@@ -130,6 +130,34 @@ TRACE_EVENT(nvmet_req_complete, 


);



#define aer_name(aer) { aer, #aer }



TRACE_EVENT(nvmet_async_event,

	TP_PROTO(struct nvmet_ctrl *ctrl, __le32 result),

	TP_ARGS(ctrl, result),

	TP_STRUCT__entry(

		__field(int, ctrl_id)

		__field(u32, result)

	),

	TP_fast_assign(

		__entry->ctrl_id = ctrl->cntlid;

		__entry->result = (le32_to_cpu(result) & 0xff00) >> 8;

	),

	TP_printk("nvmet%d: NVME_AEN=%#08x [%s]",

		__entry->ctrl_id, __entry->result,

		__print_symbolic(__entry->result,

		aer_name(NVME_AER_NOTICE_NS_CHANGED),

		aer_name(NVME_AER_NOTICE_ANA),

		aer_name(NVME_AER_NOTICE_FW_ACT_STARTING),

		aer_name(NVME_AER_NOTICE_DISC_CHANGED),

		aer_name(NVME_AER_ERROR),

		aer_name(NVME_AER_SMART),

		aer_name(NVME_AER_CSS),

		aer_name(NVME_AER_VS))

	)

);

#undef aer_name



#endif /* _TRACE_NVMET_H */



#undef TRACE_INCLUDE_PATH

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