initial code repo

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

diff --git a/src/ceph/src/librbd/object_map/InvalidateRequest.cc b/src/ceph/src/librbd/object_map/InvalidateRequest.cc
new file mode 100644 (file)
index 0000000..e744add
--- /dev/null
+++ b/src/ceph/src/librbd/object_map/InvalidateRequest.cc
@@ -0,0 +1,83 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#include "librbd/object_map/InvalidateRequest.h"
+#include "common/dout.h"
+#include "librbd/ExclusiveLock.h"
+#include "librbd/ImageCtx.h"
+
+#define dout_subsys ceph_subsys_rbd
+#undef dout_prefix
+#define dout_prefix *_dout << "librbd::object_map::InvalidateRequest: "
+
+namespace librbd {
+namespace object_map {
+
+template <typename I>
+InvalidateRequest<I>* InvalidateRequest<I>::create(I &image_ctx,
+                                                   uint64_t snap_id, bool force,
+                                                   Context *on_finish) {
+  return new InvalidateRequest<I>(image_ctx, snap_id, force, on_finish);
+}
+
+template <typename I>
+void InvalidateRequest<I>::send() {
+  I &image_ctx = this->m_image_ctx;
+  assert(image_ctx.owner_lock.is_locked());
+  assert(image_ctx.snap_lock.is_wlocked());
+
+  uint64_t snap_flags;
+  int r = image_ctx.get_flags(m_snap_id, &snap_flags);
+  if (r < 0 || ((snap_flags & RBD_FLAG_OBJECT_MAP_INVALID) != 0)) {
+    this->async_complete(r);
+    return;
+  }
+
+  CephContext *cct = image_ctx.cct;
+  lderr(cct) << this << " invalidating object map in-memory" << dendl;
+
+  // update in-memory flags
+  uint64_t flags = RBD_FLAG_OBJECT_MAP_INVALID;
+  if ((image_ctx.features & RBD_FEATURE_FAST_DIFF) != 0) {
+    flags |= RBD_FLAG_FAST_DIFF_INVALID;
+  }
+
+  r = image_ctx.update_flags(m_snap_id, flags, true);
+  if (r < 0) {
+    this->async_complete(r);
+    return;
+  }
+
+  // do not update on-disk flags if not image owner
+  if (image_ctx.image_watcher == nullptr ||
+      (!m_force && m_snap_id == CEPH_NOSNAP &&
+       image_ctx.exclusive_lock != nullptr &&
+       !image_ctx.exclusive_lock->is_lock_owner())) {
+    this->async_complete(0);
+    return;
+  }
+
+  lderr(cct) << this << " invalidating object map on-disk" << dendl;
+  librados::ObjectWriteOperation op;
+  cls_client::set_flags(&op, m_snap_id, flags, flags);
+
+  librados::AioCompletion *rados_completion =
+    this->create_callback_completion();
+  r = image_ctx.md_ctx.aio_operate(image_ctx.header_oid, rados_completion,
+                                     &op);
+  assert(r == 0);
+  rados_completion->release();
+}
+
+template <typename I>
+bool InvalidateRequest<I>::should_complete(int r) {
+  I &image_ctx = this->m_image_ctx;
+  CephContext *cct = image_ctx.cct;
+  lderr(cct) << this << " " << __func__ << ": r=" << r << dendl;
+  return true;
+}
+
+} // namespace object_map
+} // namespace librbd
+
+template class librbd::object_map::InvalidateRequest<librbd::ImageCtx>;