1 files changed, 116 insertions, 0 deletions
diff --git a/src/librbd/crypto/ShutDownCryptoRequest.cc b/src/librbd/crypto/ShutDownCryptoRequest.cc
new file mode 100644
index 000000000..fb1e77479
--- /dev/null
+++ b/src/librbd/crypto/ShutDownCryptoRequest.cc
@@ -0,0 +1,116 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#include "ShutDownCryptoRequest.h"
+
+#include "common/dout.h"
+#include "common/errno.h"
+#include "librbd/Utils.h"
+#include "librbd/crypto/CryptoImageDispatch.h"
+#include "librbd/crypto/CryptoObjectDispatch.h"
+#include "librbd/crypto/EncryptionFormat.h"
+#include "librbd/io/ImageDispatcherInterface.h"
+#include "librbd/io/ObjectDispatcherInterface.h"
+
+#define dout_subsys ceph_subsys_rbd
+#undef dout_prefix
+#define dout_prefix *_dout << "librbd::crypto::ShutDownCryptoRequest: " \
+                           << this << " " << __func__ << ": "
+
+namespace librbd {
+namespace crypto {
+
+using librbd::util::create_context_callback;
+
+template <typename I>
+ShutDownCryptoRequest<I>::ShutDownCryptoRequest(I* image_ctx,
+                                                Context* on_finish)
+    : m_image_ctx(image_ctx), m_on_finish(on_finish) {}
+
+template <typename I>
+void ShutDownCryptoRequest<I>::send() {
+  shut_down_object_dispatch();
+}
+
+template <typename I>
+void ShutDownCryptoRequest<I>::shut_down_object_dispatch() {
+  if (!m_image_ctx->io_object_dispatcher->exists(
+          io::OBJECT_DISPATCH_LAYER_CRYPTO)) {
+    finish(0);
+    return;
+  }
+
+  auto ctx = create_context_callback<
+          ShutDownCryptoRequest<I>,
+          &ShutDownCryptoRequest<I>::handle_shut_down_object_dispatch>(this);
+
+  m_image_ctx->io_object_dispatcher->shut_down_dispatch(
+          io::OBJECT_DISPATCH_LAYER_CRYPTO, ctx);
+}
+
+template <typename I>
+void ShutDownCryptoRequest<I>::handle_shut_down_object_dispatch(int r) {
+  ldout(m_image_ctx->cct, 20) << "r=" << r << dendl;
+
+  if (r < 0) {
+    lderr(m_image_ctx->cct) << "failed to shut down object dispatch: "
+                            << cpp_strerror(r) << dendl;
+    finish(r);
+    return;
+  }
+
+  shut_down_image_dispatch();
+}
+
+template <typename I>
+void ShutDownCryptoRequest<I>::shut_down_image_dispatch() {
+  if (!m_image_ctx->io_image_dispatcher->exists(
+          io::IMAGE_DISPATCH_LAYER_CRYPTO)) {
+    finish(0);
+    return;
+  }
+
+  auto ctx = create_context_callback<
+        ShutDownCryptoRequest<I>,
+        &ShutDownCryptoRequest<I>::handle_shut_down_image_dispatch>(this);
+  m_image_ctx->io_image_dispatcher->shut_down_dispatch(
+          io::IMAGE_DISPATCH_LAYER_CRYPTO, ctx);
+}
+
+template <typename I>
+void ShutDownCryptoRequest<I>::handle_shut_down_image_dispatch(int r) {
+  ldout(m_image_ctx->cct, 20) << "r=" << r << dendl;
+
+  if (r < 0) {
+    lderr(m_image_ctx->cct) << "failed to shut down image dispatch: "
+                            << cpp_strerror(r) << dendl;
+  }
+  finish(r);
+}
+
+template <typename I>
+void ShutDownCryptoRequest<I>::finish(int r) {
+  ldout(m_image_ctx->cct, 20) << "r=" << r << dendl;
+
+  if (r == 0) {
+    {
+      std::unique_lock image_locker{m_image_ctx->image_lock};
+      m_image_ctx->encryption_format.reset();
+    }
+    
+    if (m_image_ctx->parent != nullptr) {
+      // move to shutting down parent crypto
+      m_image_ctx = m_image_ctx->parent;
+      shut_down_object_dispatch();
+      return;
+    }
+  }
+
+  m_on_finish->complete(r);
+  delete this;
+}
+
+} // namespace crypto
+} // namespace librbd
+
+template class librbd::crypto::ShutDownCryptoRequest<librbd::ImageCtx>;