1 files changed, 116 insertions, 0 deletions
diff --git a/src/librbd/TrashWatcher.cc b/src/librbd/TrashWatcher.cc
new file mode 100644
index 000000000..75d588205
--- /dev/null
+++ b/src/librbd/TrashWatcher.cc
@@ -0,0 +1,116 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#include "librbd/TrashWatcher.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::TrashWatcher: " << __func__ << ": "
+
+namespace librbd {
+
+using namespace trash_watcher;
+using namespace watcher;
+
+using librbd::util::create_rados_callback;
+
+namespace {
+
+static const uint64_t NOTIFY_TIMEOUT_MS = 5000;
+
+} // anonymous namespace
+
+template <typename I>
+TrashWatcher<I>::TrashWatcher(librados::IoCtx &io_ctx,
+                              asio::ContextWQ *work_queue)
+  : Watcher(io_ctx, work_queue, RBD_TRASH) {
+}
+
+template <typename I>
+void TrashWatcher<I>::notify_image_added(
+    librados::IoCtx &io_ctx, const std::string& image_id,
+    const cls::rbd::TrashImageSpec& trash_image_spec, Context *on_finish) {
+  CephContext *cct = reinterpret_cast<CephContext*>(io_ctx.cct());
+  ldout(cct, 20) << dendl;
+
+  bufferlist bl;
+  encode(NotifyMessage{ImageAddedPayload{image_id, trash_image_spec}}, bl);
+
+  librados::AioCompletion *comp = create_rados_callback(on_finish);
+  int r = io_ctx.aio_notify(RBD_TRASH, comp, bl, NOTIFY_TIMEOUT_MS, nullptr);
+  ceph_assert(r == 0);
+  comp->release();
+}
+
+template <typename I>
+void TrashWatcher<I>::notify_image_removed(librados::IoCtx &io_ctx,
+                                           const std::string& image_id,
+                                           Context *on_finish) {
+  CephContext *cct = reinterpret_cast<CephContext*>(io_ctx.cct());
+  ldout(cct, 20) << dendl;
+
+  bufferlist bl;
+  encode(NotifyMessage{ImageRemovedPayload{image_id}}, bl);
+
+  librados::AioCompletion *comp = create_rados_callback(on_finish);
+  int r = io_ctx.aio_notify(RBD_TRASH, comp, bl, NOTIFY_TIMEOUT_MS, nullptr);
+  ceph_assert(r == 0);
+  comp->release();
+}
+
+template <typename I>
+void TrashWatcher<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 {
+    auto iter = bl.cbegin();
+    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<TrashWatcher<I>>(
+    this, notify_id, handle), notify_message.payload);
+}
+
+template <typename I>
+bool TrashWatcher<I>::handle_payload(const ImageAddedPayload &payload,
+                                     Context *on_notify_ack) {
+  CephContext *cct = this->m_cct;
+  ldout(cct, 20) << dendl;
+  handle_image_added(payload.image_id, payload.trash_image_spec);
+  return true;
+}
+
+template <typename I>
+bool TrashWatcher<I>::handle_payload(const ImageRemovedPayload &payload,
+                                     Context *on_notify_ack) {
+  CephContext *cct = this->m_cct;
+  ldout(cct, 20) << dendl;
+  handle_image_removed(payload.image_id);
+  return true;
+}
+
+template <typename I>
+bool TrashWatcher<I>::handle_payload(const UnknownPayload &payload,
+                                     Context *on_notify_ack) {
+  return true;
+}
+
+} // namespace librbd
+
+template class librbd::TrashWatcher<librbd::ImageCtx>;