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// -*- 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>;
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