commit 6d519a5f95960176039baf0af8799fa289915534
author Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Sat May 22 18:15:08 2010 +0100
committer Anthony Liguori <aliguori@us.ibm.com> Thu Sep 09 16:22:45 2010 -0500
tree c3ede0800ba02c527e99b40382881803fa3305a8
parent cd245a19329edfcd968b00d05ad92de7a0e2daa1

trace: Trace virtio-blk, multiwrite, and paio_submit

This patch adds trace events that make it possible to observe
virtio-blk.

Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>

hw/virtio-blk.c

diff --git a/hw/virtio-blk.c b/hw/virtio-blk.c
index 395eb9a..bd6bbe6 100644
--- a/hw/virtio-blk.c
+++ b/hw/virtio-blk.c
@@ -13,6 +13,7 @@
 
 #include <qemu-common.h>
 #include "qemu-error.h"
+#include "trace.h"
 #include "blockdev.h"
 #include "virtio-blk.h"
 #ifdef __linux__
@@ -52,6 +53,8 @@
 {
     VirtIOBlock *s = req->dev;
 
+    trace_virtio_blk_req_complete(req, status);
+
     req->in->status = status;
     virtqueue_push(s->vq, &req->elem, req->qiov.size + sizeof(*req->in));
     virtio_notify(&s->vdev, s->vq);
@@ -88,6 +91,8 @@
 {
     VirtIOBlockReq *req = opaque;
 
+    trace_virtio_blk_rw_complete(req, ret);
+
     if (ret) {
         int is_read = !(req->out->type & VIRTIO_BLK_T_OUT);
         if (virtio_blk_handle_rw_error(req, -ret, is_read))
@@ -270,6 +275,8 @@
 {
     BlockRequest *blkreq;
 
+    trace_virtio_blk_handle_write(req, req->out->sector, req->qiov.size / 512);
+
     if (req->out->sector & req->dev->sector_mask) {
         virtio_blk_rw_complete(req, -EIO);
         return;