blktrace: pass zfcp driver data
This patch writes the channel and fabric latencies in nanoseconds per
request via blktrace for later analysis. The utilization of the inbound
and outbound adapter queue is also reported.
Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com>
Signed-off-by: Martin Peschke <mp3@de.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/drivers/s390/scsi/zfcp_fsf.h b/drivers/s390/scsi/zfcp_fsf.h
index fd3a887..fa2a317 100644
--- a/drivers/s390/scsi/zfcp_fsf.h
+++ b/drivers/s390/scsi/zfcp_fsf.h
@@ -439,4 +439,16 @@
u8 log[FSF_QTCB_LOG_SIZE];
} __attribute__ ((packed));
+struct zfcp_blk_drv_data {
+#define ZFCP_BLK_DRV_DATA_MAGIC 0x1
+ u32 magic;
+#define ZFCP_BLK_LAT_VALID 0x1
+#define ZFCP_BLK_REQ_ERROR 0x2
+ u16 flags;
+ u8 inb_usage;
+ u8 outb_usage;
+ u64 channel_lat;
+ u64 fabric_lat;
+} __attribute__ ((packed));
+
#endif /* FSF_H */