--- /dev/null
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#include "common/dout.h"
+#include "common/errno.h"
+#include "include/assert.h"
+#include "librbd/Utils.h"
+#include "common/Timer.h"
+#include "common/WorkQueue.h"
+#include "journal/Settings.h"
+#include "librbd/journal/CreateRequest.h"
+#include "librbd/journal/RemoveRequest.h"
+
+#define dout_subsys ceph_subsys_rbd
+#undef dout_prefix
+#define dout_prefix *_dout << "librbd::Journal::CreateRequest: "
+
+namespace librbd {
+
+using util::create_context_callback;
+
+namespace journal {
+
+template<typename I>
+CreateRequest<I>::CreateRequest(IoCtx &ioctx, const std::string &imageid,
+ uint8_t order, uint8_t splay_width,
+ const std::string &object_pool,
+ uint64_t tag_class, TagData &tag_data,
+ const std::string &client_id,
+ ContextWQ *op_work_queue,
+ Context *on_finish)
+ : m_ioctx(ioctx), m_image_id(imageid), m_order(order),
+ m_splay_width(splay_width), m_object_pool(object_pool),
+ m_tag_class(tag_class), m_tag_data(tag_data), m_image_client_id(client_id),
+ m_op_work_queue(op_work_queue), m_on_finish(on_finish) {
+ m_cct = reinterpret_cast<CephContext *>(m_ioctx.cct());
+}
+
+template<typename I>
+void CreateRequest<I>::send() {
+ ldout(m_cct, 20) << this << " " << __func__ << dendl;
+
+ if (m_order > 64 || m_order < 12) {
+ lderr(m_cct) << "order must be in the range [12, 64]" << dendl;
+ complete(-EDOM);
+ return;
+ }
+ if (m_splay_width == 0) {
+ complete(-EINVAL);
+ return;
+ }
+
+ get_pool_id();
+}
+
+template<typename I>
+void CreateRequest<I>::get_pool_id() {
+ ldout(m_cct, 20) << this << " " << __func__ << dendl;
+
+ if (m_object_pool.empty()) {
+ create_journal();
+ return;
+ }
+
+ librados::Rados rados(m_ioctx);
+ IoCtx data_ioctx;
+ int r = rados.ioctx_create(m_object_pool.c_str(), data_ioctx);
+ if (r != 0) {
+ lderr(m_cct) << "failed to create journal: "
+ << "error opening journal object pool '" << m_object_pool
+ << "': " << cpp_strerror(r) << dendl;
+ complete(r);
+ return;
+ }
+
+ m_pool_id = data_ioctx.get_id();
+ create_journal();
+}
+
+template<typename I>
+void CreateRequest<I>::create_journal() {
+ ldout(m_cct, 20) << this << " " << __func__ << dendl;
+
+ ImageCtx::get_timer_instance(m_cct, &m_timer, &m_timer_lock);
+ m_journaler = new Journaler(m_op_work_queue, m_timer, m_timer_lock,
+ m_ioctx, m_image_id, m_image_client_id, {});
+
+ using klass = CreateRequest<I>;
+ Context *ctx = create_context_callback<klass, &klass::handle_create_journal>(this);
+
+ m_journaler->create(m_order, m_splay_width, m_pool_id, ctx);
+}
+
+template<typename I>
+Context *CreateRequest<I>::handle_create_journal(int *result) {
+ ldout(m_cct, 20) << __func__ << ": r=" << *result << dendl;
+
+ if (*result < 0) {
+ lderr(m_cct) << "failed to create journal: " << cpp_strerror(*result) << dendl;
+ shut_down_journaler(*result);
+ return nullptr;
+ }
+
+ allocate_journal_tag();
+ return nullptr;
+}
+
+template<typename I>
+void CreateRequest<I>::allocate_journal_tag() {
+ ldout(m_cct, 20) << this << " " << __func__ << dendl;
+
+ using klass = CreateRequest<I>;
+ Context *ctx = create_context_callback<klass, &klass::handle_journal_tag>(this);
+
+ ::encode(m_tag_data, m_bl);
+ m_journaler->allocate_tag(m_tag_class, m_bl, &m_tag, ctx);
+}
+
+template<typename I>
+Context *CreateRequest<I>::handle_journal_tag(int *result) {
+ ldout(m_cct, 20) << __func__ << ": r=" << *result << dendl;
+
+ if (*result < 0) {
+ lderr(m_cct) << "failed to allocate tag: " << cpp_strerror(*result) << dendl;
+ shut_down_journaler(*result);
+ return nullptr;
+ }
+
+ register_client();
+ return nullptr;
+}
+
+template<typename I>
+void CreateRequest<I>::register_client() {
+ ldout(m_cct, 20) << this << " " << __func__ << dendl;
+
+ m_bl.clear();
+ ::encode(ClientData{ImageClientMeta{m_tag.tag_class}}, m_bl);
+
+ using klass = CreateRequest<I>;
+ Context *ctx = create_context_callback<klass, &klass::handle_register_client>(this);
+
+ m_journaler->register_client(m_bl, ctx);
+}
+
+template<typename I>
+Context *CreateRequest<I>::handle_register_client(int *result) {
+ ldout(m_cct, 20) << __func__ << ": r=" << *result << dendl;
+
+ if (*result < 0) {
+ lderr(m_cct) << "failed to register client: " << cpp_strerror(*result) << dendl;
+ }
+
+ shut_down_journaler(*result);
+ return nullptr;
+}
+
+template<typename I>
+void CreateRequest<I>::shut_down_journaler(int r) {
+ ldout(m_cct, 20) << this << " " << __func__ << dendl;
+
+ m_r_saved = r;
+
+ using klass = CreateRequest<I>;
+ Context *ctx = create_context_callback<klass, &klass::handle_journaler_shutdown>(this);
+
+ m_journaler->shut_down(ctx);
+}
+
+template<typename I>
+Context *CreateRequest<I>::handle_journaler_shutdown(int *result) {
+ ldout(m_cct, 20) << __func__ << ": r=" << *result << dendl;
+
+ if (*result < 0) {
+ lderr(m_cct) << "failed to shut down journaler: " << cpp_strerror(*result) << dendl;
+ }
+
+ delete m_journaler;
+
+ if (!m_r_saved) {
+ complete(0);
+ return nullptr;
+ }
+
+ // there was an error during journal creation, so we rollback
+ // what ever was done. the easiest way to do this is to invoke
+ // journal remove state machine, although it's not the most
+ // cleanest approach when it comes to redundancy, but that's
+ // ok during the failure path.
+ remove_journal();
+ return nullptr;
+}
+
+template<typename I>
+void CreateRequest<I>::remove_journal() {
+ ldout(m_cct, 20) << this << " " << __func__ << dendl;
+
+ using klass = CreateRequest<I>;
+ Context *ctx = create_context_callback<klass, &klass::handle_remove_journal>(this);
+
+ RemoveRequest<I> *req = RemoveRequest<I>::create(
+ m_ioctx, m_image_id, m_image_client_id, m_op_work_queue, ctx);
+ req->send();
+}
+
+template<typename I>
+Context *CreateRequest<I>::handle_remove_journal(int *result) {
+ ldout(m_cct, 20) << __func__ << ": r=" << *result << dendl;
+
+ if (*result < 0) {
+ lderr(m_cct) << "error cleaning up journal after creation failed: "
+ << cpp_strerror(*result) << dendl;
+ }
+
+ complete(m_r_saved);
+ return nullptr;
+}
+
+template<typename I>
+void CreateRequest<I>::complete(int r) {
+ ldout(m_cct, 20) << this << " " << __func__ << dendl;
+
+ if (r == 0) {
+ ldout(m_cct, 20) << "done." << dendl;
+ }
+
+ m_on_finish->complete(r);
+ delete this;
+}
+
+} // namespace journal
+} // namespace librbd
+
+template class librbd::journal::CreateRequest<librbd::ImageCtx>;
Code Review / stor4nfv.git / blobdiff