tests: hide stderr for postcopy recovery test

We dumped something when network failure happens.  We should avoid those
messages to be dumped when running the tests:

  $ ./tests/migration-test -p /x86_64/migration/postcopy/recovery
  /x86_64/migration/postcopy/recovery: qemu-system-x86_64: check_section_footer: Read section footer failed: -5
  qemu-system-x86_64: Detected IO failure for postcopy. Migration paused.
  qemu-system-x86_64: Detected IO failure for postcopy. Migration paused.
  OK

After the patch:

  $ ./tests/migration-test -p /x86_64/migration/postcopy/recovery
  /x86_64/migration/postcopy/recovery: OK

Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
Message-Id: <20180710091902.28780-11-peterx@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>

1 files changed, 5 insertions, 4 deletions

diff --git a/tests/migration-test.c b/tests/migration-test.c
index d8b2633fce..086f727b34 100644
--- a/tests/migration-test.c
+++ b/tests/migration-test.c
@@ -572,12 +572,13 @@ static void test_deprecated(void)
 }
 
 static int migrate_postcopy_prepare(QTestState **from_ptr,
-                                     QTestState **to_ptr)
+                                     QTestState **to_ptr,
+                                     bool hide_error)
 {
     char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
     QTestState *from, *to;
 
-    if (test_migrate_start(&from, &to, uri, false)) {
+    if (test_migrate_start(&from, &to, uri, hide_error)) {
         return -1;
     }
 
@@ -624,7 +625,7 @@ static void test_postcopy(void)
 {
     QTestState *from, *to;
 
-    if (migrate_postcopy_prepare(&from, &to)) {
+    if (migrate_postcopy_prepare(&from, &to, false)) {
         return;
     }
     migrate_postcopy_start(from, to);
@@ -636,7 +637,7 @@ static void test_postcopy_recovery(void)
     QTestState *from, *to;
     char *uri;
 
-    if (migrate_postcopy_prepare(&from, &to)) {
+    if (migrate_postcopy_prepare(&from, &to, true)) {
         return;
     }