[SCSI] add scsi trace core functions and put trace points

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Tomohiro Kusumi <kusumi.tomohiro@jp.fujitsu.com>
Signed-off-by: Kei Tokunaga <tokunaga.keiich@jp.fujitsu.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/scsi/scsi.c b/drivers/scsi/scsi.c
index 1c08f6164658..ad0ed212db4a 100644
--- a/drivers/scsi/scsi.c
+++ b/drivers/scsi/scsi.c
@@ -67,6 +67,9 @@
 #include "scsi_priv.h"
 #include "scsi_logging.h"
 
+#define CREATE_TRACE_POINTS
+#include <trace/events/scsi.h>
+
 static void scsi_done(struct scsi_cmnd *cmd);
 
 /*
@@ -747,10 +750,12 @@ int scsi_dispatch_cmd(struct scsi_cmnd *cmd)
                 cmd->result = (DID_NO_CONNECT << 16);
                 scsi_done(cmd);
         } else {
+                trace_scsi_dispatch_cmd_start(cmd);
                 rtn = host->hostt->queuecommand(cmd, scsi_done);
         }
         spin_unlock_irqrestore(host->host_lock, flags);
         if (rtn) {
+                trace_scsi_dispatch_cmd_error(cmd, rtn);
                 if (rtn != SCSI_MLQUEUE_DEVICE_BUSY &&
                     rtn != SCSI_MLQUEUE_TARGET_BUSY)
                         rtn = SCSI_MLQUEUE_HOST_BUSY;
@@ -781,6 +786,7 @@ int scsi_dispatch_cmd(struct scsi_cmnd *cmd)
  */
 static void scsi_done(struct scsi_cmnd *cmd)
 {
+        trace_scsi_dispatch_cmd_done(cmd);
         blk_complete_request(cmd->request);
 }