File virtio-scsi-trace-events.patch of Package qemu.23253

From: Hannes Reinecke <hare@suse.de>
Date: Wed, 11 Nov 2020 13:09:27 +0100
Subject: virtio-scsi: trace events

Git-commit: eb8cb3d9dcfbcc74ebaabed4ef0d915eeffa4da1
References: bsc#1178049,bsc#1194938

Add trace events for SCSI and TMF command tracing.

Signed-off-by: Hannes Reinecke <hare@suse.de>
BR: Includes minor tweaks that came from the PTF patch as opposed to the
one upstreamed.
Signed-off-by: Lin Ma <lma@suse.com>
---
 hw/scsi/trace-events  |  6 ++++++
 hw/scsi/virtio-scsi.c | 19 ++++++++++++++++++-
 2 files changed, 24 insertions(+), 1 deletion(-)

diff --git a/hw/scsi/trace-events b/hw/scsi/trace-events
index 9a4a60ca63549c7ff3acac03e95d..a91394ae6b4cb728d5da032547b3 100644
--- a/hw/scsi/trace-events
+++ b/hw/scsi/trace-events
@@ -294,6 +294,12 @@ lsi_awoken(void) "Woken by SIGP"
 lsi_reg_read(const char *name, int offset, uint8_t ret) "Read reg %s 0x%x = 0x%02x"
 lsi_reg_write(const char *name, int offset, uint8_t val) "Write reg %s 0x%x = 0x%02x"
 
+# hw/scsi/virtio-scsi.c
+virtio_scsi_cmd_req(int lun, uint32_t tag, uint8_t cmd) "virtio_scsi_cmd_req lun=%u tag=0x%x cmd=0x%x"
+virtio_scsi_cmd_resp(int lun, uint32_t tag, int response, uint8_t status) "virtio_scsi_cmd_resp lun=%u tag=0x%x response=%d status=0x%x"
+virtio_scsi_tmf_req(int lun, uint32_t tag, int subtype) "virtio_scsi_tmf_req lun=%u tag=0x%x subtype=%d"
+virtio_scsi_tmf_resp(int lun, uint32_t tag, int response) "virtio_scsi_tmf_resp lun=%u tag=0x%x response=%d"
+
 # scsi-disk.c
 scsi_disk_check_condition(uint32_t tag, uint8_t key, uint8_t asc, uint8_t ascq) "Command complete tag=0x%x sense=%d/%d/%d"
 scsi_disk_read_complete(uint32_t tag, size_t size) "Data ready tag=0x%x len=%zd"
diff --git a/hw/scsi/virtio-scsi.c b/hw/scsi/virtio-scsi.c
index 3db9a8aae99362a4621a42e3fceb..132fc8e693b5c9ab913db6960877 100644
--- a/hw/scsi/virtio-scsi.c
+++ b/hw/scsi/virtio-scsi.c
@@ -27,6 +27,7 @@
 #include "scsi/constants.h"
 #include "hw/virtio/virtio-bus.h"
 #include "hw/virtio/virtio-access.h"
+#include "trace.h"
 
 static inline int virtio_scsi_get_lun(uint8_t *lun)
 {
@@ -239,7 +240,11 @@ static void virtio_scsi_cancel_notify(Notifier *notifier, void *data)
                                                notifier);
 
     if (--n->tmf_req->remaining == 0) {
-        virtio_scsi_complete_req(n->tmf_req);
+        VirtIOSCSIReq *req = n->tmf_req;
+
+        trace_virtio_scsi_tmf_resp(virtio_scsi_get_lun(req->req.tmf.lun),
+                                   req->req.tmf.tag, req->resp.tmf.response);
+        virtio_scsi_complete_req(req);
     }
     g_free(n);
 }
@@ -273,6 +278,8 @@ static int virtio_scsi_do_tmf(VirtIOSCSI *s, VirtIOSCSIReq *req)
     req->req.tmf.subtype =
         virtio_tswap32(VIRTIO_DEVICE(s), req->req.tmf.subtype);
 
+    trace_virtio_scsi_tmf_req(virtio_scsi_get_lun(req->req.tmf.lun),
+                              req->req.tmf.tag, req->req.tmf.subtype);
     switch (req->req.tmf.subtype) {
     case VIRTIO_SCSI_T_TMF_ABORT_TASK:
     case VIRTIO_SCSI_T_TMF_QUERY_TASK:
@@ -434,6 +441,10 @@ static void virtio_scsi_handle_ctrl_req(VirtIOSCSI *s, VirtIOSCSIReq *req)
         }
     }
     if (r == 0) {
+        if (type == VIRTIO_SCSI_T_TMF)
+            trace_virtio_scsi_tmf_resp(virtio_scsi_get_lun(req->req.tmf.lun),
+                                       req->req.tmf.tag,
+                                       req->resp.tmf.response);
         virtio_scsi_complete_req(req);
     } else {
         assert(r == -EINPROGRESS);
@@ -469,6 +480,10 @@ static void virtio_scsi_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq)
 
 static void virtio_scsi_complete_cmd_req(VirtIOSCSIReq *req)
 {
+    trace_virtio_scsi_cmd_resp(virtio_scsi_get_lun(req->req.cmd.lun),
+                               req->req.cmd.tag,
+                               req->resp.cmd.response,
+                               req->resp.cmd.status);
     /* Sense data is not in req->resp and is copied separately
      * in virtio_scsi_command_complete.
      */
@@ -566,6 +581,8 @@ static int virtio_scsi_handle_cmd_req_prepare(VirtIOSCSI *s, VirtIOSCSIReq *req)
             return -EINVAL;
         }
     }
+    trace_virtio_scsi_cmd_req(virtio_scsi_get_lun(req->req.cmd.lun),
+                              req->req.cmd.tag, req->req.cmd.cdb[0]);
 
     d = virtio_scsi_device_get(s, req->req.cmd.lun);
     if (!d) {