[PATCH v3 7/9] tests/qtest: capture RESUME events during migration

["Daniel P. Berrangé" <berrange@redhat.com>]

When running migration tests we monitor for a STOP event so we can skip
redundant waits. This will be needed for the RESUME event too shortly.

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
---
 tests/qtest/migration-helpers.c | 12 ++++++++++++
 tests/qtest/migration-helpers.h |  2 ++
 tests/qtest/migration-test.c    |  5 +++++
 3 files changed, 19 insertions(+)

diff --git a/tests/qtest/migration-helpers.c b/tests/qtest/migration-helpers.c
index 884d8a2e07..d50b565967 100644
--- a/tests/qtest/migration-helpers.c
+++ b/tests/qtest/migration-helpers.c
@@ -35,6 +35,18 @@ bool migrate_watch_for_stop(QTestState *who, const char *name,
     return false;
 }
 
+bool migrate_watch_for_resume(QTestState *who, const char *name,
+                              QDict *event, void *opaque)
+{
+    bool *seen = opaque;
+
+    if (g_str_equal(name, "RESUME")) {
+        *seen = true;
+    }
+
+    return false;
+}
+
 /*
  * Send QMP command "migrate".
  * Arguments are built from @fmt... (formatted like
diff --git a/tests/qtest/migration-helpers.h b/tests/qtest/migration-helpers.h
index aab0745cfe..009e250e90 100644
--- a/tests/qtest/migration-helpers.h
+++ b/tests/qtest/migration-helpers.h
@@ -17,6 +17,8 @@
 
 bool migrate_watch_for_stop(QTestState *who, const char *name,
                             QDict *event, void *opaque);
+bool migrate_watch_for_resume(QTestState *who, const char *name,
+                              QDict *event, void *opaque);
 
 G_GNUC_PRINTF(3, 4)
 void migrate_qmp(QTestState *who, const char *uri, const char *fmt, ...);
diff --git a/tests/qtest/migration-test.c b/tests/qtest/migration-test.c
index d8b4282abc..aee25e1c4f 100644
--- a/tests/qtest/migration-test.c
+++ b/tests/qtest/migration-test.c
@@ -44,6 +44,7 @@ unsigned start_address;
 unsigned end_address;
 static bool uffd_feature_thread_id;
 static bool got_stop;
+static bool got_resume;
 
 /*
  * Dirtylimit stop working if dirty page rate error
@@ -607,6 +608,7 @@ static int test_migrate_start(QTestState **from, QTestState **to,
     }
 
     got_stop = false;
+    got_resume = false;
     bootpath = g_strdup_printf("%s/bootsect", tmpfs);
     if (strcmp(arch, "i386") == 0 || strcmp(arch, "x86_64") == 0) {
         /* the assembled x86 boot sector should be exactly one sector large */
@@ -712,6 +714,9 @@ static int test_migrate_start(QTestState **from, QTestState **to,
                                  args->opts_target ? args->opts_target : "",
                                  ignore_stderr);
     *to = qtest_init(cmd_target);
+    qtest_qmp_set_event_callback(*to,
+                                 migrate_watch_for_resume,
+                                 &got_resume);
 
     /*
      * Remove shmem file immediately to avoid memory leak in test failed case.
-- 
2.40.1