initial code repo

[stor4nfv.git] / src / ceph / src / librbd / operation / SnapshotRenameRequest.cc

diff --git a/src/ceph/src/librbd/operation/SnapshotRenameRequest.cc b/src/ceph/src/librbd/operation/SnapshotRenameRequest.cc
new file mode 100644 (file)
index 0000000..236d828
--- /dev/null
+++ b/src/ceph/src/librbd/operation/SnapshotRenameRequest.cc
@@ -0,0 +1,105 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#include "librbd/operation/SnapshotRenameRequest.h"
+#include "common/dout.h"
+#include "common/errno.h"
+#include "librbd/ExclusiveLock.h"
+#include "librbd/ImageCtx.h"
+
+#define dout_subsys ceph_subsys_rbd
+#undef dout_prefix
+#define dout_prefix *_dout << "librbd::SnapshotRenameRequest: "
+
+namespace librbd {
+namespace operation {
+
+namespace {
+
+template <typename I>
+std::ostream& operator<<(std::ostream& os,
+                         const typename SnapshotRenameRequest<I>::State& state) {
+  switch(state) {
+  case SnapshotRenameRequest<I>::STATE_RENAME_SNAP:
+    os << "RENAME_SNAP";
+    break;
+  }
+  return os;
+}
+
+} // anonymous namespace
+
+template <typename I>
+SnapshotRenameRequest<I>::SnapshotRenameRequest(I &image_ctx,
+                                               Context *on_finish,
+                                               uint64_t snap_id,
+                                               const std::string &snap_name)
+  : Request<I>(image_ctx, on_finish), m_snap_id(snap_id), m_snap_name(snap_name) {
+}
+
+template <typename I>
+journal::Event SnapshotRenameRequest<I>::create_event(uint64_t op_tid) const {
+  I &image_ctx = this->m_image_ctx;
+  assert(image_ctx.snap_lock.is_locked());
+
+  std::string src_snap_name;
+  auto snap_info_it = image_ctx.snap_info.find(m_snap_id);
+  if (snap_info_it != image_ctx.snap_info.end()) {
+    src_snap_name = snap_info_it->second.name;
+  }
+
+  return journal::SnapRenameEvent(op_tid, m_snap_id, src_snap_name,
+                                  m_snap_name);
+}
+
+template <typename I>
+void SnapshotRenameRequest<I>::send_op() {
+  send_rename_snap();
+}
+
+template <typename I>
+bool SnapshotRenameRequest<I>::should_complete(int r) {
+  I &image_ctx = this->m_image_ctx;
+  CephContext *cct = image_ctx.cct;
+  ldout(cct, 5) << this << " " << __func__ << ": state=" << m_state << ", "
+                << "r=" << r << dendl;
+  if (r < 0) {
+    if (r == -EEXIST) {
+      ldout(cct, 1) << "snapshot already exists" << dendl;
+    } else {
+      lderr(cct) << "encountered error: " << cpp_strerror(r) << dendl;
+    }
+  }
+  return true;
+}
+
+template <typename I>
+void SnapshotRenameRequest<I>::send_rename_snap() {
+  I &image_ctx = this->m_image_ctx;
+  assert(image_ctx.owner_lock.is_locked());
+  RWLock::RLocker md_locker(image_ctx.md_lock);
+  RWLock::RLocker snap_locker(image_ctx.snap_lock);
+
+  CephContext *cct = image_ctx.cct;
+  ldout(cct, 5) << this << " " << __func__ << dendl;
+
+  m_state = STATE_RENAME_SNAP;
+
+  librados::ObjectWriteOperation op;
+  if (image_ctx.old_format) {
+    cls_client::old_snapshot_rename(&op, m_snap_id, m_snap_name);
+  } else {
+    cls_client::snapshot_rename(&op, m_snap_id, m_snap_name);
+  }
+
+  librados::AioCompletion *rados_completion = this->create_callback_completion();
+  int r = image_ctx.md_ctx.aio_operate(image_ctx.header_oid,
+                                       rados_completion, &op);
+  assert(r == 0);
+  rados_completion->release();
+}
+
+} // namespace operation
+} // namespace librbd
+
+template class librbd::operation::SnapshotRenameRequest<librbd::ImageCtx>;