initial code repo

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

diff --git a/src/ceph/src/librbd/operation/SnapshotLimitRequest.cc b/src/ceph/src/librbd/operation/SnapshotLimitRequest.cc
new file mode 100644 (file)
index 0000000..670e0f0
--- /dev/null
+++ b/src/ceph/src/librbd/operation/SnapshotLimitRequest.cc
@@ -0,0 +1,67 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#include "librbd/operation/SnapshotLimitRequest.h"
+#include "common/dout.h"
+#include "common/errno.h"
+#include "librbd/ImageCtx.h"
+
+#define dout_subsys ceph_subsys_rbd
+#undef dout_prefix
+#define dout_prefix *_dout << "librbd::SnapshotLimitRequest: "
+
+namespace librbd {
+namespace operation {
+
+template <typename I>
+SnapshotLimitRequest<I>::SnapshotLimitRequest(I &image_ctx,
+                                             Context *on_finish,
+                                             uint64_t limit)
+  : Request<I>(image_ctx, on_finish), m_snap_limit(limit) {
+}
+
+template <typename I>
+void SnapshotLimitRequest<I>::send_op() {
+  send_limit_snaps();
+}
+
+template <typename I>
+bool SnapshotLimitRequest<I>::should_complete(int r) {
+  I &image_ctx = this->m_image_ctx;
+  CephContext *cct = image_ctx.cct;
+  ldout(cct, 5) << this << " " << __func__ << "r=" << r << dendl;
+
+  if (r < 0) {
+    lderr(cct) << "encountered error: " << cpp_strerror(r) << dendl;
+  }
+  return true;
+}
+
+template <typename I>
+void SnapshotLimitRequest<I>::send_limit_snaps() {
+  I &image_ctx = this->m_image_ctx;
+  assert(image_ctx.owner_lock.is_locked());
+
+  CephContext *cct = image_ctx.cct;
+  ldout(cct, 5) << this << " " << __func__ << dendl;
+
+  {
+    RWLock::RLocker md_locker(image_ctx.md_lock);
+    RWLock::RLocker snap_locker(image_ctx.snap_lock);
+
+    librados::ObjectWriteOperation op;
+    cls_client::snapshot_set_limit(&op, m_snap_limit);
+
+    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::SnapshotLimitRequest<librbd::ImageCtx>;