initial code repo

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

diff --git a/src/ceph/src/librbd/object_map/CreateRequest.cc b/src/ceph/src/librbd/object_map/CreateRequest.cc
new file mode 100644 (file)
index 0000000..846b49e
--- /dev/null
+++ b/src/ceph/src/librbd/object_map/CreateRequest.cc
@@ -0,0 +1,93 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#include "librbd/object_map/CreateRequest.h"
+#include "include/assert.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"
+
+#define dout_subsys ceph_subsys_rbd
+#undef dout_prefix
+#define dout_prefix *_dout << "librbd::object_map::CreateRequest: "
+
+namespace librbd {
+namespace object_map {
+
+using util::create_context_callback;
+using util::create_rados_callback;
+
+template <typename I>
+CreateRequest<I>::CreateRequest(I *image_ctx, Context *on_finish)
+  : m_image_ctx(image_ctx), m_on_finish(on_finish) {
+}
+
+template <typename I>
+void CreateRequest<I>::send() {
+  CephContext *cct = m_image_ctx->cct;
+
+  uint64_t max_size = m_image_ctx->size;
+
+  {
+    RWLock::WLocker snap_locker(m_image_ctx->snap_lock);
+    m_snap_ids.push_back(CEPH_NOSNAP);
+    for (auto it : m_image_ctx->snap_info) {
+      max_size = MAX(max_size, it.second.size);
+      m_snap_ids.push_back(it.first);
+    }
+
+    if (ObjectMap<>::is_compatible(m_image_ctx->layout, max_size)) {
+      send_object_map_resize();
+      return;
+    }
+  }
+
+  lderr(cct) << "image size not compatible with object map" << dendl;
+  m_on_finish->complete(-EINVAL);
+}
+
+template <typename I>
+void CreateRequest<I>::send_object_map_resize() {
+  CephContext *cct = m_image_ctx->cct;
+  ldout(cct, 20) << __func__ << dendl;
+
+  Context *ctx = create_context_callback<
+    CreateRequest<I>, &CreateRequest<I>::handle_object_map_resize>(this);
+  C_Gather *gather_ctx = new C_Gather(cct, ctx);
+
+  for (auto snap_id : m_snap_ids) {
+    librados::ObjectWriteOperation op;
+    uint64_t snap_size = m_image_ctx->get_image_size(snap_id);
+
+    cls_client::object_map_resize(&op, Striper::get_num_objects(
+                                   m_image_ctx->layout, snap_size),
+                                 OBJECT_NONEXISTENT);
+
+    std::string oid(ObjectMap<>::object_map_name(m_image_ctx->id, snap_id));
+    librados::AioCompletion *comp = create_rados_callback(gather_ctx->new_sub());
+    int r = m_image_ctx->md_ctx.aio_operate(oid, comp, &op);
+    assert(r == 0);
+    comp->release();
+  }
+  gather_ctx->activate();
+}
+
+template <typename I>
+Context *CreateRequest<I>::handle_object_map_resize(int *result) {
+  CephContext *cct = m_image_ctx->cct;
+  ldout(cct, 20) << __func__ << ": r=" << *result << dendl;
+
+  if (*result < 0) {
+    lderr(cct) << "object map resize failed: " << cpp_strerror(*result)
+              << dendl;
+  }
+  return m_on_finish;
+}
+
+} // namespace object_map
+} // namespace librbd
+
+template class librbd::object_map::CreateRequest<librbd::ImageCtx>;