1 files changed, 136 insertions, 0 deletions
diff --git a/src/librbd/crypto/FormatRequest.cc b/src/librbd/crypto/FormatRequest.cc
new file mode 100644
index 000000000..5e90bbb76
--- /dev/null
+++ b/src/librbd/crypto/FormatRequest.cc
@@ -0,0 +1,136 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#include "FormatRequest.h"
+
+#include "common/dout.h"
+#include "common/errno.h"
+#include "librbd/ImageCtx.h"
+#include "librbd/Utils.h"
+#include "librbd/crypto/EncryptionFormat.h"
+#include "librbd/crypto/ShutDownCryptoRequest.h"
+#include "librbd/crypto/Utils.h"
+#include "librbd/io/AioCompletion.h"
+#include "librbd/io/ImageDispatchSpec.h"
+#include "librbd/io/ObjectDispatcherInterface.h"
+#include "librbd/io/Types.h"
+
+#define dout_subsys ceph_subsys_rbd
+#undef dout_prefix
+#define dout_prefix *_dout << "librbd::crypto::FormatRequest: " << this \
+                           << " " << __func__ << ": "
+
+namespace librbd {
+namespace crypto {
+
+using librbd::util::create_context_callback;
+
+template <typename I>
+FormatRequest<I>::FormatRequest(
+        I* image_ctx, EncryptionFormat format,
+        Context* on_finish) : m_image_ctx(image_ctx),
+                              m_format(std::move(format)),
+                              m_on_finish(on_finish) {
+}
+
+template <typename I>
+void FormatRequest<I>::send() {
+  if (m_image_ctx->test_features(RBD_FEATURE_JOURNALING)) {
+    lderr(m_image_ctx->cct) << "cannot use encryption with journal" << dendl;
+    finish(-ENOTSUP);
+    return;
+  }
+  
+  if (m_image_ctx->encryption_format.get() == nullptr) {
+    format();
+    return;
+  } else if (m_image_ctx->parent != nullptr) {
+    lderr(m_image_ctx->cct) << "cannot format a cloned image "
+                               "while encryption is loaded"
+                            << dendl;
+    finish(-EINVAL);
+    return;
+  }
+
+  auto ctx = create_context_callback<
+          FormatRequest<I>, &FormatRequest<I>::handle_shutdown_crypto>(this);
+  auto *req = ShutDownCryptoRequest<I>::create(m_image_ctx, ctx);
+  req->send();
+}
+
+template <typename I>
+void FormatRequest<I>::handle_shutdown_crypto(int r) {
+  ldout(m_image_ctx->cct, 20) << "r=" << r << dendl;
+
+  if (r != 0) {
+    lderr(m_image_ctx->cct) << "unable to unload existing crypto: "
+                            << cpp_strerror(r) << dendl;
+    finish(r);
+    return;
+  }
+
+  format();
+}
+
+template <typename I>
+void FormatRequest<I>::format() {
+  auto ctx = create_context_callback<
+          FormatRequest<I>, &FormatRequest<I>::handle_format>(this);
+  m_format->format(m_image_ctx, ctx);
+}
+
+template <typename I>
+void FormatRequest<I>::handle_format(int r) {
+  ldout(m_image_ctx->cct, 20) << "r=" << r << dendl;
+
+  if (r != 0) {
+    lderr(m_image_ctx->cct) << "unable to format image: " << cpp_strerror(r)
+                            << dendl;
+    finish(r);
+    return;
+  }
+
+  flush();
+}
+
+template <typename I>
+void FormatRequest<I>::flush() {
+  auto ctx = create_context_callback<
+          FormatRequest<I>, &FormatRequest<I>::handle_flush>(this);
+  auto aio_comp = io::AioCompletion::create_and_start(
+    ctx, librbd::util::get_image_ctx(m_image_ctx), io::AIO_TYPE_FLUSH);
+  auto req = io::ImageDispatchSpec::create_flush(
+    *m_image_ctx, io::IMAGE_DISPATCH_LAYER_INTERNAL_START, aio_comp,
+    io::FLUSH_SOURCE_INTERNAL, {});
+  req->send();
+}
+
+template <typename I>
+void FormatRequest<I>::handle_flush(int r) {
+  ldout(m_image_ctx->cct, 20) << "r=" << r << dendl;
+
+  if (r != 0) {
+    lderr(m_image_ctx->cct) << "unable to flush image: " << cpp_strerror(r)
+                            << dendl;
+  }
+
+  finish(r);
+}
+
+template <typename I>
+void FormatRequest<I>::finish(int r) {
+  ldout(m_image_ctx->cct, 20) << "r=" << r << dendl;
+
+  if (r == 0 && m_image_ctx->parent == nullptr) {
+    // only load on flat images, to avoid a case where encryption
+    // is wrongfully loaded only on the child image
+    util::set_crypto(m_image_ctx, std::move(m_format));
+  }
+  m_on_finish->complete(r);
+  delete this;
+}
+
+} // namespace crypto
+} // namespace librbd
+
+template class librbd::crypto::FormatRequest<librbd::ImageCtx>;