[PATCH 4/4] tests/qtest/migration: Add postcopy migration qtests to use 'channels' argument instead of uri

[Het Gala]

Add qtests to perform postcopy live migration by having list of
'channels' argument as the starting point instead of uri string.
(Note: length of the list is restricted to 1 for now)

Signed-off-by: Het Gala <het.g...@nutanix.com>
---
 tests/qtest/migration-test.c | 38 ++++++++++++++++++++++++++++++++++--
 1 file changed, 36 insertions(+), 2 deletions(-)

diff --git a/tests/qtest/migration-test.c b/tests/qtest/migration-test.c
index fa8a860811..599018baa0 100644
--- a/tests/qtest/migration-test.c
+++ b/tests/qtest/migration-test.c
@@ -1296,13 +1296,17 @@ static int migrate_postcopy_prepare(QTestState 
**from_ptr,
     migrate_ensure_non_converge(from);
 
     migrate_prepare_for_dirty_mem(from);
-    migrate_incoming_qmp(to, "tcp:127.0.0.1:0", NULL, "{}");
+    if (args->connect_channels) {
+        migrate_incoming_qmp(to, NULL, args->connect_channels, "{}");
+    } else {
+        migrate_incoming_qmp(to, "tcp:127.0.0.1:0", NULL, "{}");
+    }
 
     /* Wait for the first serial output from the source */
     wait_for_serial("src_serial");
     wait_for_suspend(from, &src_state);
 
-    migrate_qmp(from, to, NULL, NULL, "{}");
+    migrate_qmp(from, to, args->connect_uri, args->connect_channels, "{}");
 
     migrate_wait_for_dirty_mem(from, to);
 
@@ -1355,6 +1359,20 @@ static void test_postcopy(void)
     test_postcopy_common(&args);
 }
 
+static void test_postcopy_channels(void)
+{
+    MigrateCommon args = {
+        .listen_uri = "defer",
+        .connect_channels = "[ { 'channel-type': 'main',"
+                            "    'addr': { 'transport': 'socket',"
+                            "              'type': 'inet',"
+                            "              'host': '127.0.0.1',"
+                            "              'port': '0' } } ]",
+    };
+
+    test_postcopy_common(&args);
+}
+
 static void test_postcopy_suspend(void)
 {
     MigrateCommon args = {
@@ -1555,6 +1573,18 @@ static void test_postcopy_recovery(void)
     test_postcopy_recovery_common(&args);
 }
 
+static void test_postcopy_recovery_channels(void)
+{
+    MigrateCommon args = {
+        .connect_channels = "[ { 'channel-type': 'main',"
+                            "    'addr': { 'transport': 'socket',"
+                            "              'type': 'inet',"
+                            "              'host': '127.0.0.1',"
+                            "              'port': '0' } } ]",
+    };
+
+    test_postcopy_recovery_common(&args);
+}
 static void test_postcopy_recovery_compress(void)
 {
     MigrateCommon args = {
@@ -3585,8 +3615,12 @@ int main(int argc, char **argv)
 
     if (has_uffd) {
         migration_test_add("/migration/postcopy/plain", test_postcopy);
+        migration_test_add("/migration/postcopy/channels/plain",
+                           test_postcopy_channels);
         migration_test_add("/migration/postcopy/recovery/plain",
                            test_postcopy_recovery);
+        migration_test_add("/migration/postcopy/recovery/channels/plain",
+                           test_postcopy_recovery_channels);
         migration_test_add("/migration/postcopy/preempt/plain",
                            test_postcopy_preempt);
         migration_test_add("/migration/postcopy/preempt/recovery/plain",
-- 
2.22.3