1 files changed, 74 insertions, 0 deletions
diff --git a/src/librbd/crypto/LoadRequest.cc b/src/librbd/crypto/LoadRequest.cc
new file mode 100644
index 000000000..c42011f62
--- /dev/null
+++ b/src/librbd/crypto/LoadRequest.cc
@@ -0,0 +1,74 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#include "LoadRequest.h"
+
+#include "common/dout.h"
+#include "common/errno.h"
+#include "librbd/Utils.h"
+#include "librbd/ImageCtx.h"
+#include "librbd/crypto/Utils.h"
+
+#define dout_subsys ceph_subsys_rbd
+#undef dout_prefix
+#define dout_prefix *_dout << "librbd::crypto::LoadRequest: " << this \
+                           << " " << __func__ << ": "
+
+namespace librbd {
+namespace crypto {
+
+using librbd::util::create_context_callback;
+
+template <typename I>
+LoadRequest<I>::LoadRequest(
+        I* image_ctx, std::unique_ptr<EncryptionFormat<I>> format,
+        Context* on_finish) : m_image_ctx(image_ctx),
+                              m_format(std::move(format)),
+                              m_on_finish(on_finish) {
+}
+
+template <typename I>
+void LoadRequest<I>::send() {
+  if (m_image_ctx->crypto != nullptr) {
+    lderr(m_image_ctx->cct) << "encryption already loaded" << dendl;
+    finish(-EEXIST);
+    return;
+  }
+
+  auto ictx = m_image_ctx;
+  while (ictx != nullptr) {
+    if (ictx->test_features(RBD_FEATURE_JOURNALING)) {
+      lderr(m_image_ctx->cct) << "cannot use encryption with journal."
+                              << " image name: " << ictx->name << dendl;
+      finish(-ENOTSUP);
+      return;
+    }
+    ictx = ictx->parent;
+  }
+
+  auto ctx = create_context_callback<
+          LoadRequest<I>, &LoadRequest<I>::finish>(this);
+  m_format->load(m_image_ctx, ctx);
+}
+
+template <typename I>
+void LoadRequest<I>::finish(int r) {
+
+  if (r == 0) {
+    // load crypto layers to image and its ancestors
+    auto crypto = m_format->get_crypto();
+    auto ictx = m_image_ctx;
+    while (ictx != nullptr) {
+      util::set_crypto(ictx, crypto);
+      ictx = ictx->parent;
+    }
+  }
+
+  m_on_finish->complete(r);
+  delete this;
+}
+
+} // namespace crypto
+} // namespace librbd
+
+template class librbd::crypto::LoadRequest<librbd::ImageCtx>;