initial code repo

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

diff --git a/src/ceph/src/librbd/journal/OpenRequest.cc b/src/ceph/src/librbd/journal/OpenRequest.cc
new file mode 100644 (file)
index 0000000..6dbaf6e
--- /dev/null
+++ b/src/ceph/src/librbd/journal/OpenRequest.cc
@@ -0,0 +1,144 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#include "librbd/journal/OpenRequest.h"
+#include "common/dout.h"
+#include "common/errno.h"
+#include "common/WorkQueue.h"
+#include "journal/Journaler.h"
+#include "librbd/ImageCtx.h"
+#include "librbd/Journal.h"
+#include "librbd/Utils.h"
+#include "librbd/journal/Types.h"
+#include "librbd/journal/Utils.h"
+
+#define dout_subsys ceph_subsys_rbd
+#undef dout_prefix
+#define dout_prefix *_dout << "librbd::journal::OpenRequest: " << this << " " \
+                           << __func__ << ": "
+
+namespace librbd {
+namespace journal {
+
+using librbd::util::create_async_context_callback;
+using librbd::util::create_context_callback;
+using util::C_DecodeTags;
+
+template <typename I>
+OpenRequest<I>::OpenRequest(I *image_ctx, Journaler *journaler, Mutex *lock,
+                            journal::ImageClientMeta *client_meta,
+                            uint64_t *tag_tid, journal::TagData *tag_data,
+                            Context *on_finish)
+  : m_image_ctx(image_ctx), m_journaler(journaler), m_lock(lock),
+    m_client_meta(client_meta), m_tag_tid(tag_tid), m_tag_data(tag_data),
+    m_on_finish(on_finish) {
+}
+
+template <typename I>
+void OpenRequest<I>::send() {
+  send_init();
+}
+
+template <typename I>
+void OpenRequest<I>::send_init() {
+  CephContext *cct = m_image_ctx->cct;
+  ldout(cct, 20) << dendl;
+
+  m_journaler->init(create_async_context_callback(
+    *m_image_ctx, create_context_callback<
+      OpenRequest<I>, &OpenRequest<I>::handle_init>(this)));
+}
+
+template <typename I>
+void OpenRequest<I>::handle_init(int r) {
+  CephContext *cct = m_image_ctx->cct;
+  ldout(cct, 20) << "r=" << r << dendl;
+
+  if (r < 0) {
+    lderr(cct) << "failed to initialize journal: " << cpp_strerror(r)
+               << dendl;
+    finish(r);
+    return;
+  }
+
+  // locate the master image client record
+  cls::journal::Client client;
+  r = m_journaler->get_cached_client(Journal<ImageCtx>::IMAGE_CLIENT_ID,
+                                     &client);
+  if (r < 0) {
+    lderr(cct) << "failed to locate master image client" << dendl;
+    finish(r);
+    return;
+  }
+
+  librbd::journal::ClientData client_data;
+  bufferlist::iterator bl = client.data.begin();
+  try {
+    ::decode(client_data, bl);
+  } catch (const buffer::error &err) {
+    lderr(cct) << "failed to decode client meta data: " << err.what()
+               << dendl;
+    finish(-EINVAL);
+    return;
+  }
+
+  journal::ImageClientMeta *image_client_meta =
+    boost::get<journal::ImageClientMeta>(&client_data.client_meta);
+  if (image_client_meta == nullptr) {
+    lderr(cct) << this << " " << __func__ << ": "
+               << "failed to extract client meta data" << dendl;
+    finish(-EINVAL);
+    return;
+  }
+
+  ldout(cct, 20) << this << " " << __func__ << ": "
+                 << "client: " << client << ", "
+                 << "image meta: " << *image_client_meta << dendl;
+
+  m_tag_class = image_client_meta->tag_class;
+  {
+    Mutex::Locker locker(*m_lock);
+    *m_client_meta = *image_client_meta;
+  }
+
+  send_get_tags();
+}
+
+template <typename I>
+void OpenRequest<I>::send_get_tags() {
+  CephContext *cct = m_image_ctx->cct;
+  ldout(cct, 20) << dendl;
+
+  C_DecodeTags *tags_ctx = new C_DecodeTags(
+    cct, m_lock, m_tag_tid, m_tag_data, create_async_context_callback(
+      *m_image_ctx, create_context_callback<
+        OpenRequest<I>, &OpenRequest<I>::handle_get_tags>(this)));
+  m_journaler->get_tags(m_tag_class, &tags_ctx->tags, tags_ctx);
+}
+
+template <typename I>
+void OpenRequest<I>::handle_get_tags(int r) {
+  CephContext *cct = m_image_ctx->cct;
+  ldout(cct, 20) << "r=" << r << dendl;
+
+  if (r < 0) {
+    lderr(cct) << this << " " << __func__ << ": "
+               << "failed to decode journal tags: " << cpp_strerror(r) << dendl;
+  }
+
+  finish(r);
+}
+
+template <typename I>
+void OpenRequest<I>::finish(int r) {
+  CephContext *cct = m_image_ctx->cct;
+  ldout(cct, 20) << "r=" << r << dendl;
+
+  m_on_finish->complete(r);
+  delete this;
+}
+
+} // namespace journal
+} // namespace librbd
+
+template class librbd::journal::OpenRequest<librbd::ImageCtx>;