rbd-mirror: use correct ioctx for namespace

The PoolReplayer uses the ioctx for the default namespace
to check if other namespaces are enabled for mirroring, causing
it to incorrectly conclude that they are all enabled.

Fixes: https://tracker.ceph.com/issues/67676

Signed-off-by: N Balachandran <[email protected]>

Author: nbalacha

src/test/rbd_mirror/test_mock_PoolReplayer.cc

@@ -363,6 +363,14 @@ class TestMockPoolReplayer : public TestMockFixture {
           Return(0)));
   }
 
+  void expect_clone(librados::MockTestMemIoCtxImpl* mock_io_ctx) {
+    EXPECT_CALL(*mock_io_ctx, clone())
+      .WillRepeatedly(Invoke([mock_io_ctx]() {
+          mock_io_ctx->get();
+          return mock_io_ctx;
+        }));
+  }
+
   void expect_leader_watcher_init(MockLeaderWatcher& mock_leader_watcher,
                                   int r) {
     EXPECT_CALL(mock_leader_watcher, init())
@@ -727,6 +735,7 @@ TEST_F(TestMockPoolReplayer, Namespaces) {
   auto mock_remote_rados_client = mock_cluster.do_create_rados_client(
       g_ceph_context);
 
+  expect_clone(mock_local_io_ctx);
   expect_mirror_mode_get(mock_local_io_ctx);
 
   InSequence seq;
@@ -845,6 +854,7 @@ TEST_F(TestMockPoolReplayer, NamespacesError) {
   auto mock_remote_rados_client = mock_cluster.do_create_rados_client(
       g_ceph_context);
 
+  expect_clone(mock_local_io_ctx);
   expect_mirror_mode_get(mock_local_io_ctx);
 
   InSequence seq;

src/tools/rbd_mirror/PoolReplayer.cc

@@ -747,8 +747,12 @@ int PoolReplayer<I>::list_mirroring_namespaces(
   }
 
   for (auto &name : names) {
+    librados::IoCtx ns_ioctx;
+    ns_ioctx.dup(m_local_io_ctx);
+    ns_ioctx.set_namespace(name);
+
     cls::rbd::MirrorMode mirror_mode = cls::rbd::MIRROR_MODE_DISABLED;
-    int r = librbd::cls_client::mirror_mode_get(&m_local_io_ctx, &mirror_mode);
+    int r = librbd::cls_client::mirror_mode_get(&ns_ioctx, &mirror_mode);
     if (r < 0 && r != -ENOENT) {
       derr << "failed to get namespace mirror mode: " << cpp_strerror(r)
            << dendl;