X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=src%2Fceph%2Fsrc%2Ftools%2Frbd_mirror%2Fimage_replayer%2FCreateImageRequest.cc;fp=src%2Fceph%2Fsrc%2Ftools%2Frbd_mirror%2Fimage_replayer%2FCreateImageRequest.cc;h=acef392b1a4eafbb49d7aa3408cdd14f6644ec47;hb=812ff6ca9fcd3e629e49d4328905f33eee8ca3f5;hp=0000000000000000000000000000000000000000;hpb=15280273faafb77777eab341909a3f495cf248d9;p=stor4nfv.git

diff --git a/src/ceph/src/tools/rbd_mirror/image_replayer/CreateImageRequest.cc b/src/ceph/src/tools/rbd_mirror/image_replayer/CreateImageRequest.cc
new file mode 100644
index 0000000..acef392
--- /dev/null
+++ b/src/ceph/src/tools/rbd_mirror/image_replayer/CreateImageRequest.cc
@@ -0,0 +1,430 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#include "CreateImageRequest.h"
+#include "CloseImageRequest.h"
+#include "OpenImageRequest.h"
+#include "common/errno.h"
+#include "common/WorkQueue.h"
+#include "cls/rbd/cls_rbd_client.h"
+#include "librbd/ImageCtx.h"
+#include "librbd/ImageState.h"
+#include "librbd/internal.h"
+#include "librbd/Utils.h"
+#include "librbd/image/CreateRequest.h"
+#include "librbd/image/CloneRequest.h"
+
+#define dout_context g_ceph_context
+#define dout_subsys ceph_subsys_rbd_mirror
+#undef dout_prefix
+#define dout_prefix *_dout << "rbd::mirror::image_replayer::CreateImageRequest: " \
+                           << this << " " << __func__
+
+using librbd::util::create_context_callback;
+using librbd::util::create_rados_callback;
+
+namespace rbd {
+namespace mirror {
+namespace image_replayer {
+
+template <typename I>
+CreateImageRequest<I>::CreateImageRequest(librados::IoCtx &local_io_ctx,
+                                          ContextWQ *work_queue,
+                                          const std::string &global_image_id,
+                                          const std::string &remote_mirror_uuid,
+                                          const std::string &local_image_name,
+					  const std::string &local_image_id,
+                                          I *remote_image_ctx,
+                                          Context *on_finish)
+  : m_local_io_ctx(local_io_ctx), m_work_queue(work_queue),
+    m_global_image_id(global_image_id),
+    m_remote_mirror_uuid(remote_mirror_uuid),
+    m_local_image_name(local_image_name), m_local_image_id(local_image_id),
+    m_remote_image_ctx(remote_image_ctx), m_on_finish(on_finish) {
+}
+
+template <typename I>
+void CreateImageRequest<I>::send() {
+  int r = validate_parent();
+  if (r < 0) {
+    error(r);
+    return;
+  }
+
+  if (m_remote_parent_spec.pool_id == -1) {
+    create_image();
+  } else {
+    get_parent_global_image_id();
+  }
+}
+
+template <typename I>
+void CreateImageRequest<I>::create_image() {
+  dout(20) << dendl;
+
+  using klass = CreateImageRequest<I>;
+  Context *ctx = create_context_callback<klass, &klass::handle_create_image>(this);
+
+  RWLock::RLocker snap_locker(m_remote_image_ctx->snap_lock);
+
+  librbd::ImageOptions image_options;
+  image_options.set(RBD_IMAGE_OPTION_FEATURES, m_remote_image_ctx->features);
+  image_options.set(RBD_IMAGE_OPTION_ORDER, m_remote_image_ctx->order);
+  image_options.set(RBD_IMAGE_OPTION_STRIPE_UNIT,
+                    m_remote_image_ctx->stripe_unit);
+  image_options.set(RBD_IMAGE_OPTION_STRIPE_COUNT,
+                    m_remote_image_ctx->stripe_count);
+  image_options.set(RBD_IMAGE_OPTION_DATA_POOL,
+		    m_remote_image_ctx->data_ctx.get_pool_name());
+
+  librbd::image::CreateRequest<I> *req = librbd::image::CreateRequest<I>::create(
+    m_local_io_ctx, m_local_image_name, m_local_image_id,
+    m_remote_image_ctx->size, image_options, m_global_image_id,
+    m_remote_mirror_uuid, false, m_remote_image_ctx->op_work_queue, ctx);
+  req->send();
+}
+
+template <typename I>
+void CreateImageRequest<I>::handle_create_image(int r) {
+  dout(20) << ": r=" << r << dendl;
+  if (r < 0) {
+    derr << ": failed to create local image: " << cpp_strerror(r) << dendl;
+    finish(r);
+    return;
+  }
+
+  finish(0);
+}
+
+template <typename I>
+void CreateImageRequest<I>::get_parent_global_image_id() {
+  dout(20) << dendl;
+
+  librados::ObjectReadOperation op;
+  librbd::cls_client::mirror_image_get_start(&op, m_remote_parent_spec.image_id);
+
+  librados::AioCompletion *aio_comp = create_rados_callback<
+    CreateImageRequest<I>,
+    &CreateImageRequest<I>::handle_get_parent_global_image_id>(this);
+  m_out_bl.clear();
+  int r = m_remote_parent_io_ctx.aio_operate(RBD_MIRRORING, aio_comp, &op,
+                                             &m_out_bl);
+  assert(r == 0);
+  aio_comp->release();
+}
+
+template <typename I>
+void CreateImageRequest<I>::handle_get_parent_global_image_id(int r) {
+  dout(20) << ": r=" << r << dendl;
+  if (r == 0) {
+    cls::rbd::MirrorImage mirror_image;
+    bufferlist::iterator iter = m_out_bl.begin();
+    r = librbd::cls_client::mirror_image_get_finish(&iter, &mirror_image);
+    if (r == 0) {
+      m_parent_global_image_id = mirror_image.global_image_id;
+      dout(20) << ": parent_global_image_id=" << m_parent_global_image_id
+               << dendl;
+    }
+  }
+
+  if (r == -ENOENT) {
+    dout(10) << ": parent image " << m_remote_parent_spec.image_id << " not mirrored"
+             << dendl;
+    finish(r);
+    return;
+  } else if (r < 0) {
+    derr << ": failed to retrieve global image id for parent image "
+         << m_remote_parent_spec.image_id << ": " << cpp_strerror(r) << dendl;
+    finish(r);
+    return;
+  }
+
+  get_local_parent_image_id();
+}
+
+template <typename I>
+void CreateImageRequest<I>::get_local_parent_image_id() {
+  dout(20) << dendl;
+
+  librados::ObjectReadOperation op;
+  librbd::cls_client::mirror_image_get_image_id_start(
+    &op, m_parent_global_image_id);
+
+  librados::AioCompletion *aio_comp = create_rados_callback<
+    CreateImageRequest<I>,
+    &CreateImageRequest<I>::handle_get_local_parent_image_id>(this);
+  m_out_bl.clear();
+  int r = m_local_parent_io_ctx.aio_operate(RBD_MIRRORING, aio_comp, &op,
+                                            &m_out_bl);
+  assert(r == 0);
+  aio_comp->release();
+}
+
+template <typename I>
+void CreateImageRequest<I>::handle_get_local_parent_image_id(int r) {
+  dout(20) << ": r=" << r << dendl;
+
+  if (r == 0) {
+    bufferlist::iterator iter = m_out_bl.begin();
+    r = librbd::cls_client::mirror_image_get_image_id_finish(
+      &iter, &m_local_parent_spec.image_id);
+  }
+
+  if (r == -ENOENT) {
+    dout(10) << ": parent image " << m_parent_global_image_id << " not "
+             << "registered locally" << dendl;
+    finish(r);
+    return;
+  } else if (r < 0) {
+    derr << ": failed to retrieve local image id for parent image "
+         << m_parent_global_image_id << ": " << cpp_strerror(r) << dendl;
+    finish(r);
+    return;
+  }
+
+  open_remote_parent_image();
+}
+
+template <typename I>
+void CreateImageRequest<I>::open_remote_parent_image() {
+  dout(20) << dendl;
+
+  Context *ctx = create_context_callback<
+    CreateImageRequest<I>,
+    &CreateImageRequest<I>::handle_open_remote_parent_image>(this);
+  OpenImageRequest<I> *request = OpenImageRequest<I>::create(
+    m_remote_parent_io_ctx, &m_remote_parent_image_ctx,
+    m_remote_parent_spec.image_id, true, ctx);
+  request->send();
+}
+
+template <typename I>
+void CreateImageRequest<I>::handle_open_remote_parent_image(int r) {
+  dout(20) << ": r=" << r << dendl;
+  if (r < 0) {
+    derr << ": failed to open remote parent image " << m_parent_pool_name << "/"
+         << m_remote_parent_spec.image_id << dendl;
+    finish(r);
+    return;
+  }
+
+  open_local_parent_image();
+}
+
+template <typename I>
+void CreateImageRequest<I>::open_local_parent_image() {
+  dout(20) << dendl;
+
+  Context *ctx = create_context_callback<
+    CreateImageRequest<I>,
+    &CreateImageRequest<I>::handle_open_local_parent_image>(this);
+  OpenImageRequest<I> *request = OpenImageRequest<I>::create(
+    m_local_parent_io_ctx, &m_local_parent_image_ctx,
+    m_local_parent_spec.image_id, true, ctx);
+  request->send();
+}
+
+template <typename I>
+void CreateImageRequest<I>::handle_open_local_parent_image(int r) {
+  dout(20) << ": r=" << r << dendl;
+  if (r < 0) {
+    derr << ": failed to open local parent image " << m_parent_pool_name << "/"
+         << m_local_parent_spec.image_id << dendl;
+    m_ret_val = r;
+    close_remote_parent_image();
+    return;
+  }
+
+  set_local_parent_snap();
+}
+
+template <typename I>
+void CreateImageRequest<I>::set_local_parent_snap() {
+  dout(20) << dendl;
+
+  {
+    RWLock::RLocker remote_snap_locker(m_remote_parent_image_ctx->snap_lock);
+    auto it = m_remote_parent_image_ctx->snap_info.find(
+      m_remote_parent_spec.snap_id);
+    if (it != m_remote_parent_image_ctx->snap_info.end()) {
+      m_parent_snap_name = it->second.name;
+    }
+  }
+
+  if (m_parent_snap_name.empty()) {
+    m_ret_val = -ENOENT;
+    close_local_parent_image();
+    return;
+  }
+  dout(20) << ": parent_snap_name=" << m_parent_snap_name << dendl;
+
+  Context *ctx = create_context_callback<
+    CreateImageRequest<I>,
+    &CreateImageRequest<I>::handle_set_local_parent_snap>(this);
+  m_local_parent_image_ctx->state->snap_set(cls::rbd::UserSnapshotNamespace(),
+					    m_parent_snap_name,
+					    ctx);
+}
+
+template <typename I>
+void CreateImageRequest<I>::handle_set_local_parent_snap(int r) {
+  dout(20) << ": r=" << r << dendl;
+  if (r < 0) {
+    derr << ": failed to set parent snapshot " << m_parent_snap_name
+         << ": " << cpp_strerror(r) << dendl;
+    m_ret_val = r;
+    close_local_parent_image();
+    return;
+  }
+
+  clone_image();
+}
+
+template <typename I>
+void CreateImageRequest<I>::clone_image() {
+  dout(20) << dendl;
+
+  librbd::ImageOptions opts;
+  opts.set(RBD_IMAGE_OPTION_FEATURES, m_remote_image_ctx->features);
+  opts.set(RBD_IMAGE_OPTION_ORDER, m_remote_image_ctx->order);
+  opts.set(RBD_IMAGE_OPTION_STRIPE_UNIT, m_remote_image_ctx->stripe_unit);
+  opts.set(RBD_IMAGE_OPTION_STRIPE_COUNT, m_remote_image_ctx->stripe_count);
+
+  using klass = CreateImageRequest<I>;
+  Context *ctx = create_context_callback<klass, &klass::handle_clone_image>(this);
+
+  librbd::image::CloneRequest<I> *req = librbd::image::CloneRequest<I>::create(
+    m_local_parent_image_ctx, m_local_io_ctx, m_local_image_name,
+    m_local_image_id, opts, m_global_image_id, m_remote_mirror_uuid,
+    m_remote_image_ctx->op_work_queue, ctx);
+  req->send();
+}
+
+template <typename I>
+void CreateImageRequest<I>::handle_clone_image(int r) {
+  dout(20) << ": r=" << r << dendl;
+  if (r < 0) {
+    derr << ": failed to clone image " << m_parent_pool_name << "/"
+         << m_local_parent_image_ctx->name << " to "
+         << m_local_image_name << dendl;
+    m_ret_val = r;
+  }
+
+  close_local_parent_image();
+}
+
+template <typename I>
+void CreateImageRequest<I>::close_local_parent_image() {
+  dout(20) << dendl;
+  Context *ctx = create_context_callback<
+    CreateImageRequest<I>,
+    &CreateImageRequest<I>::handle_close_local_parent_image>(this);
+  CloseImageRequest<I> *request = CloseImageRequest<I>::create(
+    &m_local_parent_image_ctx, ctx);
+  request->send();
+}
+
+template <typename I>
+void CreateImageRequest<I>::handle_close_local_parent_image(int r) {
+  dout(20) << ": r=" << r << dendl;
+  if (r < 0) {
+    derr << ": error encountered closing local parent image: "
+         << cpp_strerror(r) << dendl;
+  }
+
+  close_remote_parent_image();
+}
+
+template <typename I>
+void CreateImageRequest<I>::close_remote_parent_image() {
+  dout(20) << dendl;
+  Context *ctx = create_context_callback<
+    CreateImageRequest<I>,
+    &CreateImageRequest<I>::handle_close_remote_parent_image>(this);
+  CloseImageRequest<I> *request = CloseImageRequest<I>::create(
+    &m_remote_parent_image_ctx, ctx);
+  request->send();
+}
+
+template <typename I>
+void CreateImageRequest<I>::handle_close_remote_parent_image(int r) {
+  dout(20) << ": r=" << r << dendl;
+  if (r < 0) {
+    derr << ": error encountered closing remote parent image: "
+         << cpp_strerror(r) << dendl;
+  }
+
+  finish(m_ret_val);
+}
+
+template <typename I>
+void CreateImageRequest<I>::error(int r) {
+  dout(20) << ": r=" << r << dendl;
+
+  m_work_queue->queue(create_context_callback<
+    CreateImageRequest<I>, &CreateImageRequest<I>::finish>(this), r);
+}
+
+template <typename I>
+void CreateImageRequest<I>::finish(int r) {
+  dout(20) << ": r=" << r << dendl;
+  m_on_finish->complete(r);
+  delete this;
+}
+
+template <typename I>
+int CreateImageRequest<I>::validate_parent() {
+  RWLock::RLocker owner_locker(m_remote_image_ctx->owner_lock);
+  RWLock::RLocker snap_locker(m_remote_image_ctx->snap_lock);
+
+  m_remote_parent_spec = m_remote_image_ctx->parent_md.spec;
+
+  // scan all remote snapshots for a linked parent
+  for (auto &snap_info_pair : m_remote_image_ctx->snap_info) {
+    auto &parent_spec = snap_info_pair.second.parent.spec;
+    if (parent_spec.pool_id == -1) {
+      continue;
+    } else if (m_remote_parent_spec.pool_id == -1) {
+      m_remote_parent_spec = parent_spec;
+      continue;
+    }
+
+    if (m_remote_parent_spec != parent_spec) {
+      derr << ": remote image parent spec mismatch" << dendl;
+      return -EINVAL;
+    }
+  }
+
+  if (m_remote_parent_spec.pool_id == -1) {
+    return 0;
+  }
+
+  // map remote parent pool to local parent pool
+  librados::Rados remote_rados(m_remote_image_ctx->md_ctx);
+  int r = remote_rados.ioctx_create2(m_remote_parent_spec.pool_id,
+                                     m_remote_parent_io_ctx);
+  if (r < 0) {
+    derr << ": failed to open remote parent pool " << m_remote_parent_spec.pool_id
+         << ": " << cpp_strerror(r) << dendl;
+    return r;
+  }
+
+  m_parent_pool_name = m_remote_parent_io_ctx.get_pool_name();
+
+  librados::Rados local_rados(m_local_io_ctx);
+  r = local_rados.ioctx_create(m_parent_pool_name.c_str(),
+                               m_local_parent_io_ctx);
+  if (r < 0) {
+    derr << ": failed to open local parent pool " << m_parent_pool_name << ": "
+         << cpp_strerror(r) << dendl;
+    return r;
+  }
+
+  return 0;
+}
+
+} // namespace image_replayer
+} // namespace mirror
+} // namespace rbd
+
+template class rbd::mirror::image_replayer::CreateImageRequest<librbd::ImageCtx>;