Patchwork [03/15] trace: Trace bdrv_set_locked()

login
register
mail settings
Submitter Kevin Wolf
Date April 7, 2011, 2:49 p.m.
Message ID <1302187764-16421-4-git-send-email-kwolf@redhat.com>
Download mbox | patch
Permalink /patch/90193/
State New
Headers show

Comments

Kevin Wolf - April 7, 2011, 2:49 p.m.
From: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>

It can be handy to know when the guest locks/unlocks the CD-ROM tray.
This trace event makes that possible.

Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
 block.c      |    2 ++
 trace-events |    1 +
 2 files changed, 3 insertions(+), 0 deletions(-)

Patch

diff --git a/block.c b/block.c
index c93ec6d..d8da3b0 100644
--- a/block.c
+++ b/block.c
@@ -2817,6 +2817,8 @@  void bdrv_set_locked(BlockDriverState *bs, int locked)
 {
     BlockDriver *drv = bs->drv;
 
+    trace_bdrv_set_locked(bs, locked);
+
     bs->locked = locked;
     if (drv && drv->bdrv_set_locked) {
         drv->bdrv_set_locked(bs, locked);
diff --git a/trace-events b/trace-events
index 06efdb7..703b745 100644
--- a/trace-events
+++ b/trace-events
@@ -54,6 +54,7 @@  disable bdrv_aio_multiwrite_latefail(void *mcb, int i) "mcb %p i %d"
 disable bdrv_aio_flush(void *bs, void *opaque) "bs %p opaque %p"
 disable bdrv_aio_readv(void *bs, int64_t sector_num, int nb_sectors, void *opaque) "bs %p sector_num %"PRId64" nb_sectors %d opaque %p"
 disable bdrv_aio_writev(void *bs, int64_t sector_num, int nb_sectors, void *opaque) "bs %p sector_num %"PRId64" nb_sectors %d opaque %p"
+disable bdrv_set_locked(void *bs, int locked) "bs %p locked %d"
 
 # hw/virtio-blk.c
 disable virtio_blk_req_complete(void *req, int status) "req %p status %d"