--- /dev/null
+// -*- 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>;
Code Review / stor4nfv.git / blobdiff