initial code repo

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

diff --git a/src/ceph/src/librbd/object_map/RemoveRequest.cc b/src/ceph/src/librbd/object_map/RemoveRequest.cc
new file mode 100644 (file)
index 0000000..fa6c7b4
--- /dev/null
+++ b/src/ceph/src/librbd/object_map/RemoveRequest.cc
@@ -0,0 +1,89 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#include "librbd/object_map/RemoveRequest.h"
+#include "common/dout.h"
+#include "common/errno.h"
+#include "cls/rbd/cls_rbd_client.h"
+#include "librbd/ImageCtx.h"
+#include "librbd/ObjectMap.h"
+#include "librbd/Utils.h"
+#include "include/assert.h"
+
+#define dout_subsys ceph_subsys_rbd
+#undef dout_prefix
+#define dout_prefix *_dout << "librbd::object_map::RemoveRequest: "
+
+namespace librbd {
+namespace object_map {
+
+using util::create_rados_callback;
+
+template <typename I>
+RemoveRequest<I>::RemoveRequest(I *image_ctx, Context *on_finish)
+  : m_image_ctx(image_ctx), m_on_finish(on_finish),
+    m_lock("object_map::RemoveRequest::m_lock") {
+}
+
+template <typename I>
+void RemoveRequest<I>::send() {
+  send_remove_object_map();
+}
+
+template <typename I>
+void RemoveRequest<I>::send_remove_object_map() {
+  CephContext *cct = m_image_ctx->cct;
+  ldout(cct, 20) << __func__ << dendl;
+
+  RWLock::WLocker snap_locker(m_image_ctx->snap_lock);
+  std::vector<uint64_t> snap_ids;
+  snap_ids.push_back(CEPH_NOSNAP);
+  for (auto it : m_image_ctx->snap_info) {
+    snap_ids.push_back(it.first);
+  }
+
+  Mutex::Locker locker(m_lock);
+  assert(m_ref_counter == 0);
+
+  for (auto snap_id : snap_ids) {
+    m_ref_counter++;
+    std::string oid(ObjectMap<>::object_map_name(m_image_ctx->id, snap_id));
+    using klass = RemoveRequest<I>;
+    librados::AioCompletion *comp =
+      create_rados_callback<klass, &klass::handle_remove_object_map>(this);
+
+    int r = m_image_ctx->md_ctx.aio_remove(oid, comp);
+    assert(r == 0);
+    comp->release();
+  }
+}
+
+template <typename I>
+Context *RemoveRequest<I>::handle_remove_object_map(int *result) {
+  CephContext *cct = m_image_ctx->cct;
+  ldout(cct, 20) << __func__ << ": r=" << *result << dendl;
+
+  {
+    Mutex::Locker locker(m_lock);
+    assert(m_ref_counter > 0);
+    m_ref_counter--;
+
+    if (*result < 0 && *result != -ENOENT) {
+      lderr(cct) << "failed to remove object map: " << cpp_strerror(*result)
+                << dendl;
+      m_error_result = *result;
+    }
+    if (m_ref_counter > 0) {
+      return nullptr;
+    }
+  }
+  if (m_error_result < 0) {
+    *result = m_error_result;
+  }
+  return m_on_finish;
+}
+
+} // namespace object_map
+} // namespace librbd
+
+template class librbd::object_map::RemoveRequest<librbd::ImageCtx>;