[PATCH] tests/migration: fix unix socket migration

[huangy81]

From: Hyman <huangy81@chinatelecom.cn>

The test aborts and error message as the following be throwed:
"No such file or directory: '/var/tmp/qemu-migrate-{pid}.migrate",
when the unix socket migration test nearly done. The reason is
qemu removes the unix socket file after migration before
guestperf.py script do it. So pre-check if the socket file exists
when removing it to prevent the guestperf program from aborting.

Signed-off-by: Hyman <huangy81@chinatelecom.cn>
---
 tests/migration/guestperf/engine.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tests/migration/guestperf/engine.py 
b/tests/migration/guestperf/engine.py
index 83bfc3b..86d4f21 100644
--- a/tests/migration/guestperf/engine.py
+++ b/tests/migration/guestperf/engine.py
@@ -405,7 +405,7 @@ def run(self, hardware, scenario, result_dir=os.getcwd()):
             progress_history = ret[0]
             qemu_timings = ret[1]
             vcpu_timings = ret[2]
-            if uri[0:5] == "unix:":
+            if uri[0:5] == "unix:" and os.path.exists(uri[5:]):
                 os.remove(uri[5:])
             if self._verbose:
                 print("Finished migration")
-- 
1.8.3.1