initial code repo

[stor4nfv.git] / src / ceph / src / librbd / MirroringWatcher.cc

diff --git a/src/ceph/src/librbd/MirroringWatcher.cc b/src/ceph/src/librbd/MirroringWatcher.cc
new file mode 100644 (file)
index 0000000..df28750
--- /dev/null
+++ b/src/ceph/src/librbd/MirroringWatcher.cc
@@ -0,0 +1,141 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#include "librbd/MirroringWatcher.h"
+#include "include/rbd_types.h"
+#include "include/rados/librados.hpp"
+#include "common/errno.h"
+#include "librbd/Utils.h"
+#include "librbd/watcher/Utils.h"
+
+#define dout_subsys ceph_subsys_rbd
+#undef dout_prefix
+#define dout_prefix *_dout << "librbd::MirroringWatcher: "
+
+namespace librbd {
+
+using namespace mirroring_watcher;
+using namespace watcher;
+
+using librbd::util::create_rados_callback;
+
+namespace {
+
+static const uint64_t NOTIFY_TIMEOUT_MS = 5000;
+
+} // anonymous namespace
+
+template <typename I>
+MirroringWatcher<I>::MirroringWatcher(librados::IoCtx &io_ctx,
+                                      ContextWQ *work_queue)
+  : Watcher(io_ctx, work_queue, RBD_MIRRORING) {
+}
+
+template <typename I>
+int MirroringWatcher<I>::notify_mode_updated(librados::IoCtx &io_ctx,
+                                              cls::rbd::MirrorMode mirror_mode) {
+  C_SaferCond ctx;
+  notify_mode_updated(io_ctx, mirror_mode, &ctx);
+  return ctx.wait();
+}
+
+template <typename I>
+void MirroringWatcher<I>::notify_mode_updated(librados::IoCtx &io_ctx,
+                                              cls::rbd::MirrorMode mirror_mode,
+                                              Context *on_finish) {
+  CephContext *cct = reinterpret_cast<CephContext*>(io_ctx.cct());
+  ldout(cct, 20) << dendl;
+
+  bufferlist bl;
+  ::encode(NotifyMessage{ModeUpdatedPayload{mirror_mode}}, bl);
+
+  librados::AioCompletion *comp = create_rados_callback(on_finish);
+  int r = io_ctx.aio_notify(RBD_MIRRORING, comp, bl, NOTIFY_TIMEOUT_MS,
+                            nullptr);
+  assert(r == 0);
+  comp->release();
+}
+
+template <typename I>
+int MirroringWatcher<I>::notify_image_updated(
+    librados::IoCtx &io_ctx, cls::rbd::MirrorImageState mirror_image_state,
+    const std::string &image_id, const std::string &global_image_id) {
+  C_SaferCond ctx;
+  notify_image_updated(io_ctx, mirror_image_state, image_id, global_image_id,
+                       &ctx);
+  return ctx.wait();
+}
+
+template <typename I>
+void MirroringWatcher<I>::notify_image_updated(
+    librados::IoCtx &io_ctx, cls::rbd::MirrorImageState mirror_image_state,
+    const std::string &image_id, const std::string &global_image_id,
+    Context *on_finish) {
+
+  CephContext *cct = reinterpret_cast<CephContext*>(io_ctx.cct());
+  ldout(cct, 20) << dendl;
+
+  bufferlist bl;
+  ::encode(NotifyMessage{ImageUpdatedPayload{
+      mirror_image_state, image_id, global_image_id}}, bl);
+
+  librados::AioCompletion *comp = create_rados_callback(on_finish);
+  int r = io_ctx.aio_notify(RBD_MIRRORING, comp, bl, NOTIFY_TIMEOUT_MS,
+                            nullptr);
+  assert(r == 0);
+  comp->release();
+
+}
+
+template <typename I>
+void MirroringWatcher<I>::handle_notify(uint64_t notify_id, uint64_t handle,
+                                        uint64_t notifier_id, bufferlist &bl) {
+  CephContext *cct = this->m_cct;
+  ldout(cct, 15) << ": notify_id=" << notify_id << ", "
+                 << "handle=" << handle << dendl;
+
+
+  NotifyMessage notify_message;
+  try {
+    bufferlist::iterator iter = bl.begin();
+    ::decode(notify_message, iter);
+  } catch (const buffer::error &err) {
+    lderr(cct) << ": error decoding image notification: " << err.what()
+               << dendl;
+    Context *ctx = new C_NotifyAck(this, notify_id, handle);
+    ctx->complete(0);
+    return;
+  }
+
+  apply_visitor(watcher::util::HandlePayloadVisitor<MirroringWatcher<I>>(
+                  this, notify_id, handle), notify_message.payload);
+}
+
+template <typename I>
+bool MirroringWatcher<I>::handle_payload(const ModeUpdatedPayload &payload,
+                                         Context *on_notify_ack) {
+  CephContext *cct = this->m_cct;
+  ldout(cct, 20) << ": mode updated: " << payload.mirror_mode << dendl;
+  handle_mode_updated(payload.mirror_mode);
+  return true;
+}
+
+template <typename I>
+bool MirroringWatcher<I>::handle_payload(const ImageUpdatedPayload &payload,
+                                         Context *on_notify_ack) {
+  CephContext *cct = this->m_cct;
+  ldout(cct, 20) << ": image state updated" << dendl;
+  handle_image_updated(payload.mirror_image_state, payload.image_id,
+                       payload.global_image_id);
+  return true;
+}
+
+template <typename I>
+bool MirroringWatcher<I>::handle_payload(const UnknownPayload &payload,
+                                         Context *on_notify_ack) {
+  return true;
+}
+
+} // namespace librbd
+
+template class librbd::MirroringWatcher<librbd::ImageCtx>;