Re: [PATCH 4/4] scsi: Trace SCSI sense data

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On 4/28/23 01:09, Niklas Cassel wrote:
Do we really need to dump the whole sense buffer?

Shouldn't simply printing the SK, ASC, ASCQ be sufficient?
Hi Niklas,

How about replacing patch 4/4 of this series with the patch below?

Thanks,

Bart.



diff --git a/include/trace/events/scsi.h b/include/trace/events/scsi.h
index 370ade0d4093..d4a27cd4040b 100644
--- a/include/trace/events/scsi.h
+++ b/include/trace/events/scsi.h
@@ -258,9 +258,14 @@ DECLARE_EVENT_CLASS(scsi_cmd_done_timeout_template,
 		__field( unsigned int,	prot_sglen )
 		__field( unsigned char,	prot_op )
 		__dynamic_array(unsigned char,	cmnd, cmd->cmd_len)
+		__field( u8, sense_key )
+		__field( u8, asc )
+		__field( u8, ascq )
 	),

 	TP_fast_assign(
+		struct scsi_sense_hdr sshdr;
+
 		__entry->host_no	= cmd->device->host->host_no;
 		__entry->channel	= cmd->device->channel;
 		__entry->id		= cmd->device->id;
@@ -272,11 +277,21 @@ DECLARE_EVENT_CLASS(scsi_cmd_done_timeout_template,
 		__entry->prot_sglen	= scsi_prot_sg_count(cmd);
 		__entry->prot_op	= scsi_get_prot_op(cmd);
 		memcpy(__get_dynamic_array(cmnd), cmd->cmnd, cmd->cmd_len);
+		if (cmd->result & 0xff &&
+		    scsi_command_normalize_sense(cmd, &sshdr)) {
+			__entry->sense_key = sshdr.sense_key;
+			__entry->asc = sshdr.asc;
+			__entry->ascq = sshdr.ascq;
+		} else {
+			__entry->sense_key = 0;
+			__entry->asc = 0;
+			__entry->ascq = 0;
+		}
 	),

 	TP_printk("host_no=%u channel=%u id=%u lun=%u data_sgl=%u " \
 		  "prot_sgl=%u prot_op=%s cmnd=(%s %s raw=%s) result=(driver=" \
-		  "%s host=%s message=%s status=%s)",
+		  "%s host=%s message=%s status=%s sense_key=%u asc=%#x ascq=%#x)",
 		  __entry->host_no, __entry->channel, __entry->id,
 		  __entry->lun, __entry->data_sglen, __entry->prot_sglen,
 		  show_prot_op_name(__entry->prot_op),
@@ -286,7 +301,8 @@ DECLARE_EVENT_CLASS(scsi_cmd_done_timeout_template,
 		  "DRIVER_OK",
 		  show_hostbyte_name(((__entry->result) >> 16) & 0xff),
 		  "COMMAND_COMPLETE",
-		  show_statusbyte_name(__entry->result & 0xff))
+		  show_statusbyte_name(__entry->result & 0xff),
+		  __entry->sense_key, __entry->asc, __entry->ascq)
 );

 DEFINE_EVENT(scsi_cmd_done_timeout_template, scsi_dispatch_cmd_done,




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