initial code repo

[stor4nfv.git] / src / ceph / src / librbd / journal / RemoveRequest.cc

diff --git a/src/ceph/src/librbd/journal/RemoveRequest.cc b/src/ceph/src/librbd/journal/RemoveRequest.cc
new file mode 100644 (file)
index 0000000..aa2d13e
--- /dev/null
+++ b/src/ceph/src/librbd/journal/RemoveRequest.cc
@@ -0,0 +1,154 @@
+// -*- 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 "common/Timer.h"
+#include "common/WorkQueue.h"
+#include "journal/Settings.h"
+#include "include/assert.h"
+#include "librbd/Utils.h"
+#include "librbd/journal/RemoveRequest.h"
+
+#define dout_subsys ceph_subsys_rbd
+#undef dout_prefix
+#define dout_prefix *_dout << "librbd::Journal::RemoveRequest: "
+
+namespace librbd {
+
+using util::create_context_callback;
+
+namespace journal {
+
+template<typename I>
+RemoveRequest<I>::RemoveRequest(IoCtx &ioctx, const std::string &image_id,
+                                const std::string &client_id,
+                                ContextWQ *op_work_queue,
+                                Context *on_finish)
+  : m_ioctx(ioctx), m_image_id(image_id), 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 RemoveRequest<I>::send() {
+  ldout(m_cct, 20) << this << " " << __func__ << dendl;
+
+  stat_journal();
+}
+
+template<typename I>
+void RemoveRequest<I>::stat_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 = RemoveRequest<I>;
+  Context *ctx = create_context_callback<klass, &klass::handle_stat_journal>(this);
+
+  m_journaler->exists(ctx);
+}
+
+template<typename I>
+Context *RemoveRequest<I>::handle_stat_journal(int *result) {
+  ldout(m_cct, 20) << __func__ << ": r=" << *result << dendl;
+
+  if ((*result < 0) && (*result != -ENOENT)) {
+    lderr(m_cct) << "failed to stat journal header: " << cpp_strerror(*result) << dendl;
+    shut_down_journaler(*result);
+    return nullptr;
+  }
+
+  if (*result == -ENOENT) {
+    shut_down_journaler(0);
+    return nullptr;
+  }
+
+  init_journaler();
+  return nullptr;
+}
+
+template<typename I>
+void RemoveRequest<I>::init_journaler() {
+  ldout(m_cct, 20) << this << " " << __func__ << dendl;
+
+  using klass = RemoveRequest<I>;
+  Context *ctx = create_context_callback<klass, &klass::handle_init_journaler>(this);
+
+  m_journaler->init(ctx);
+}
+
+template<typename I>
+Context *RemoveRequest<I>::handle_init_journaler(int *result) {
+  ldout(m_cct, 20) << __func__ << ": r=" << *result << dendl;
+
+  if ((*result < 0) && (*result != -ENOENT)) {
+    lderr(m_cct) << "failed to init journaler: " << cpp_strerror(*result) << dendl;
+    shut_down_journaler(*result);
+    return nullptr;
+  }
+
+  remove_journal();
+  return nullptr;
+}
+
+template<typename I>
+void RemoveRequest<I>::remove_journal() {
+  ldout(m_cct, 20) << this << " " << __func__ << dendl;
+
+  using klass = RemoveRequest<I>;
+  Context *ctx = create_context_callback<klass, &klass::handle_remove_journal>(this);
+
+  m_journaler->remove(true, ctx);
+}
+
+template<typename I>
+Context *RemoveRequest<I>::handle_remove_journal(int *result) {
+  ldout(m_cct, 20) << __func__ << ": r=" << *result << dendl;
+
+  if (*result < 0) {
+    lderr(m_cct) << "failed to remove journal: " << cpp_strerror(*result) << dendl;
+  }
+
+  shut_down_journaler(*result);
+  return nullptr;
+}
+
+template<typename I>
+void RemoveRequest<I>::shut_down_journaler(int r) {
+  ldout(m_cct, 20) << this << " " << __func__ << dendl;
+
+  m_r_saved = r;
+
+  using klass = RemoveRequest<I>;
+  Context *ctx = create_context_callback<klass, &klass::handle_journaler_shutdown>(this);
+
+  m_journaler->shut_down(ctx);
+}
+
+template<typename I>
+Context *RemoveRequest<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 == 0) {
+    ldout(m_cct, 20) << "done." << dendl;
+  }
+
+  m_on_finish->complete(m_r_saved);
+  delete this;
+
+  return nullptr;
+}
+
+} // namespace journal
+} // namespace librbd
+
+template class librbd::journal::RemoveRequest<librbd::ImageCtx>;