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// -*- 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>;
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