[Qemu-devel] [PATCH 1/3] trace: Trace bdrv_set_locked()

[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>
---
 block.c      |    2 ++
 trace-events |    1 +
 2 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/block.c b/block.c
index b476479..8f224b4 100644
--- a/block.c
+++ b/block.c
@@ -2696,6 +2696,8 @@ 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 e6138ea..f87f683 100644
--- a/trace-events
+++ b/trace-events
@@ -53,6 +53,7 @@ disable bdrv_aio_multiwrite_earlyfail(void *mcb) "mcb %p"
 disable bdrv_aio_multiwrite_latefail(void *mcb, int i) "mcb %p i %d"
 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"
-- 
1.7.4.1