--- /dev/null
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#include "ImageCopyRequest.h"
+#include "ObjectCopyRequest.h"
+#include "include/stringify.h"
+#include "common/errno.h"
+#include "common/Timer.h"
+#include "journal/Journaler.h"
+#include "librbd/Utils.h"
+#include "tools/rbd_mirror/ProgressContext.h"
+
+#define dout_context g_ceph_context
+#define dout_subsys ceph_subsys_rbd_mirror
+#undef dout_prefix
+#define dout_prefix *_dout << "rbd::mirror::image_sync::ImageCopyRequest: " \
+ << this << " " << __func__
+
+namespace rbd {
+namespace mirror {
+namespace image_sync {
+
+using librbd::util::create_context_callback;
+using librbd::util::unique_lock_name;
+
+template <typename I>
+ImageCopyRequest<I>::ImageCopyRequest(I *local_image_ctx, I *remote_image_ctx,
+ SafeTimer *timer, Mutex *timer_lock,
+ Journaler *journaler,
+ MirrorPeerClientMeta *client_meta,
+ MirrorPeerSyncPoint *sync_point,
+ Context *on_finish,
+ ProgressContext *progress_ctx)
+ : BaseRequest("rbd::mirror::image_sync::ImageCopyRequest",
+ local_image_ctx->cct, on_finish),
+ m_local_image_ctx(local_image_ctx), m_remote_image_ctx(remote_image_ctx),
+ m_timer(timer), m_timer_lock(timer_lock), m_journaler(journaler),
+ m_client_meta(client_meta), m_sync_point(sync_point),
+ m_progress_ctx(progress_ctx),
+ m_lock(unique_lock_name("ImageCopyRequest::m_lock", this)),
+ m_updating_sync_point(false), m_update_sync_ctx(nullptr),
+ m_update_sync_point_interval(m_local_image_ctx->cct->_conf->template get_val<double>(
+ "rbd_mirror_sync_point_update_age")),
+ m_client_meta_copy(*client_meta) {
+ assert(!m_client_meta_copy.sync_points.empty());
+}
+
+template <typename I>
+void ImageCopyRequest<I>::send() {
+ int r = compute_snap_map();
+ if (r < 0) {
+ finish(r);
+ return;
+ }
+
+ send_update_max_object_count();
+}
+
+template <typename I>
+void ImageCopyRequest<I>::cancel() {
+ Mutex::Locker locker(m_lock);
+
+ dout(20) << dendl;
+ m_canceled = true;
+}
+
+template <typename I>
+void ImageCopyRequest<I>::send_update_max_object_count() {
+ uint64_t max_objects = m_client_meta->sync_object_count;
+ {
+ RWLock::RLocker snap_locker(m_remote_image_ctx->snap_lock);
+ max_objects = std::max(max_objects,
+ m_remote_image_ctx->get_object_count(CEPH_NOSNAP));
+ for (auto snap_id : m_remote_image_ctx->snaps) {
+ max_objects = std::max(max_objects,
+ m_remote_image_ctx->get_object_count(snap_id));
+ }
+ }
+
+ if (max_objects <= m_client_meta->sync_object_count) {
+ send_object_copies();
+ return;
+ }
+
+ update_progress("UPDATE_MAX_OBJECT_COUNT");
+
+ dout(20) << ": sync_object_count=" << max_objects << dendl;
+
+ m_client_meta_copy = *m_client_meta;
+ m_client_meta_copy.sync_object_count = max_objects;
+
+ bufferlist client_data_bl;
+ librbd::journal::ClientData client_data(m_client_meta_copy);
+ ::encode(client_data, client_data_bl);
+
+ Context *ctx = create_context_callback<
+ ImageCopyRequest<I>, &ImageCopyRequest<I>::handle_update_max_object_count>(
+ this);
+ m_journaler->update_client(client_data_bl, ctx);
+}
+
+template <typename I>
+void ImageCopyRequest<I>::handle_update_max_object_count(int r) {
+ dout(20) << ": r=" << r << dendl;
+
+ if (r == 0) {
+ Mutex::Locker locker(m_lock);
+ if (m_canceled) {
+ dout(10) << ": image copy canceled" << dendl;
+ r = -ECANCELED;
+ }
+ }
+
+ if (r < 0) {
+ if (r != -ECANCELED) {
+ derr << ": failed to update client data: " << cpp_strerror(r) << dendl;
+ }
+ finish(r);
+ return;
+ }
+
+ // update provided meta structure to reflect reality
+ m_client_meta->sync_object_count = m_client_meta_copy.sync_object_count;
+
+ send_object_copies();
+}
+
+template <typename I>
+void ImageCopyRequest<I>::send_object_copies() {
+ CephContext *cct = m_local_image_ctx->cct;
+
+ m_object_no = 0;
+ if (m_sync_point->object_number) {
+ m_object_no = *m_sync_point->object_number + 1;
+ }
+ m_end_object_no = m_client_meta->sync_object_count;
+
+ dout(20) << ": start_object=" << m_object_no << ", "
+ << "end_object=" << m_end_object_no << dendl;
+
+ update_progress("COPY_OBJECT");
+
+ bool complete;
+ {
+ Mutex::Locker locker(m_lock);
+ for (int i = 0; i < cct->_conf->get_val<int64_t>("rbd_concurrent_management_ops"); ++i) {
+ send_next_object_copy();
+ if (m_ret_val < 0 && m_current_ops == 0) {
+ break;
+ }
+ }
+ complete = (m_current_ops == 0);
+
+ if (!complete) {
+ m_update_sync_ctx = new FunctionContext([this](int r) {
+ this->send_update_sync_point();
+ });
+ }
+ }
+
+ {
+ Mutex::Locker timer_locker(*m_timer_lock);
+ if (m_update_sync_ctx) {
+ m_update_sync_ctx = m_timer->add_event_after(
+ m_update_sync_point_interval,
+ m_update_sync_ctx);
+ }
+ }
+
+ if (complete) {
+ send_flush_sync_point();
+ }
+}
+
+template <typename I>
+void ImageCopyRequest<I>::send_next_object_copy() {
+ assert(m_lock.is_locked());
+
+ if (m_canceled && m_ret_val == 0) {
+ dout(10) << ": image copy canceled" << dendl;
+ m_ret_val = -ECANCELED;
+ }
+
+ if (m_ret_val < 0 || m_object_no >= m_end_object_no) {
+ return;
+ }
+
+ uint64_t ono = m_object_no++;
+
+ dout(20) << ": object_num=" << ono << dendl;
+
+ ++m_current_ops;
+
+ Context *ctx = create_context_callback<
+ ImageCopyRequest<I>, &ImageCopyRequest<I>::handle_object_copy>(this);
+ ObjectCopyRequest<I> *req = ObjectCopyRequest<I>::create(
+ m_local_image_ctx, m_remote_image_ctx, &m_snap_map, ono, ctx);
+ req->send();
+}
+
+template <typename I>
+void ImageCopyRequest<I>::handle_object_copy(int r) {
+ dout(20) << ": r=" << r << dendl;
+
+ int percent;
+ bool complete;
+ {
+ Mutex::Locker locker(m_lock);
+ assert(m_current_ops > 0);
+ --m_current_ops;
+
+ percent = 100 * m_object_no / m_end_object_no;
+
+ if (r < 0) {
+ derr << ": object copy failed: " << cpp_strerror(r) << dendl;
+ if (m_ret_val == 0) {
+ m_ret_val = r;
+ }
+ }
+
+ send_next_object_copy();
+ complete = (m_current_ops == 0);
+ }
+
+ update_progress("COPY_OBJECT " + stringify(percent) + "%", false);
+
+ if (complete) {
+ bool do_flush = true;
+ {
+ Mutex::Locker timer_locker(*m_timer_lock);
+ Mutex::Locker locker(m_lock);
+ if (!m_updating_sync_point) {
+ if (m_update_sync_ctx != nullptr) {
+ m_timer->cancel_event(m_update_sync_ctx);
+ m_update_sync_ctx = nullptr;
+ }
+ } else {
+ do_flush = false;
+ }
+ }
+
+ if (do_flush) {
+ send_flush_sync_point();
+ }
+ }
+}
+
+template <typename I>
+void ImageCopyRequest<I>::send_update_sync_point() {
+ Mutex::Locker l(m_lock);
+
+ m_update_sync_ctx = nullptr;
+
+ if (m_canceled || m_ret_val < 0 || m_current_ops == 0) {
+ return;
+ }
+
+ if (m_sync_point->object_number &&
+ (m_object_no-1) == m_sync_point->object_number.get()) {
+ // update sync point did not progress since last sync
+ return;
+ }
+
+ m_updating_sync_point = true;
+
+ m_client_meta_copy = *m_client_meta;
+ m_sync_point->object_number = m_object_no - 1;
+
+ CephContext *cct = m_local_image_ctx->cct;
+ ldout(cct, 20) << ": sync_point=" << *m_sync_point << dendl;
+
+ bufferlist client_data_bl;
+ librbd::journal::ClientData client_data(*m_client_meta);
+ ::encode(client_data, client_data_bl);
+
+ Context *ctx = create_context_callback<
+ ImageCopyRequest<I>, &ImageCopyRequest<I>::handle_update_sync_point>(
+ this);
+ m_journaler->update_client(client_data_bl, ctx);
+}
+
+template <typename I>
+void ImageCopyRequest<I>::handle_update_sync_point(int r) {
+ CephContext *cct = m_local_image_ctx->cct;
+ ldout(cct, 20) << ": r=" << r << dendl;
+
+ if (r < 0) {
+ *m_client_meta = m_client_meta_copy;
+ lderr(cct) << ": failed to update client data: " << cpp_strerror(r)
+ << dendl;
+ }
+
+ bool complete;
+ {
+ Mutex::Locker l(m_lock);
+ m_updating_sync_point = false;
+
+ complete = m_current_ops == 0 || m_canceled || m_ret_val < 0;
+
+ if (!complete) {
+ m_update_sync_ctx = new FunctionContext([this](int r) {
+ this->send_update_sync_point();
+ });
+ }
+ }
+
+ if (!complete) {
+ Mutex::Locker timer_lock(*m_timer_lock);
+ if (m_update_sync_ctx) {
+ m_timer->add_event_after(m_update_sync_point_interval,
+ m_update_sync_ctx);
+ }
+ } else {
+ send_flush_sync_point();
+ }
+}
+
+template <typename I>
+void ImageCopyRequest<I>::send_flush_sync_point() {
+ if (m_ret_val < 0) {
+ finish(m_ret_val);
+ return;
+ }
+
+ update_progress("FLUSH_SYNC_POINT");
+
+ m_client_meta_copy = *m_client_meta;
+ if (m_object_no > 0) {
+ m_sync_point->object_number = m_object_no - 1;
+ } else {
+ m_sync_point->object_number = boost::none;
+ }
+
+ dout(20) << ": sync_point=" << *m_sync_point << dendl;
+
+ bufferlist client_data_bl;
+ librbd::journal::ClientData client_data(m_client_meta_copy);
+ ::encode(client_data, client_data_bl);
+
+ Context *ctx = create_context_callback<
+ ImageCopyRequest<I>, &ImageCopyRequest<I>::handle_flush_sync_point>(
+ this);
+ m_journaler->update_client(client_data_bl, ctx);
+}
+
+template <typename I>
+void ImageCopyRequest<I>::handle_flush_sync_point(int r) {
+ dout(20) << ": r=" << r << dendl;
+
+ if (r < 0) {
+ *m_client_meta = m_client_meta_copy;
+
+ derr << ": failed to update client data: " << cpp_strerror(r)
+ << dendl;
+ finish(r);
+ return;
+ }
+
+ finish(0);
+}
+
+template <typename I>
+int ImageCopyRequest<I>::compute_snap_map() {
+
+ librados::snap_t snap_id_start = 0;
+ librados::snap_t snap_id_end;
+ {
+ RWLock::RLocker snap_locker(m_remote_image_ctx->snap_lock);
+ snap_id_end = m_remote_image_ctx->get_snap_id(
+ cls::rbd::UserSnapshotNamespace(), m_sync_point->snap_name);
+ if (snap_id_end == CEPH_NOSNAP) {
+ derr << ": failed to locate snapshot: "
+ << m_sync_point->snap_name << dendl;
+ return -ENOENT;
+ }
+
+ if (!m_sync_point->from_snap_name.empty()) {
+ snap_id_start = m_remote_image_ctx->get_snap_id(
+ cls::rbd::UserSnapshotNamespace(), m_sync_point->from_snap_name);
+ if (snap_id_start == CEPH_NOSNAP) {
+ derr << ": failed to locate from snapshot: "
+ << m_sync_point->from_snap_name << dendl;
+ return -ENOENT;
+ }
+ }
+ }
+
+ SnapIds snap_ids;
+ for (auto it = m_client_meta->snap_seqs.begin();
+ it != m_client_meta->snap_seqs.end(); ++it) {
+ snap_ids.insert(snap_ids.begin(), it->second);
+ if (it->first < snap_id_start) {
+ continue;
+ } else if (it->first > snap_id_end) {
+ break;
+ }
+
+ m_snap_map[it->first] = snap_ids;
+ }
+
+ if (m_snap_map.empty()) {
+ derr << ": failed to map snapshots within boundary" << dendl;
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+template <typename I>
+void ImageCopyRequest<I>::update_progress(const std::string &description,
+ bool flush) {
+ dout(20) << ": " << description << dendl;
+
+ if (m_progress_ctx) {
+ m_progress_ctx->update_progress("IMAGE_COPY/" + description, flush);
+ }
+}
+
+} // namespace image_sync
+} // namespace mirror
+} // namespace rbd
+
+template class rbd::mirror::image_sync::ImageCopyRequest<librbd::ImageCtx>;
Code Review / stor4nfv.git / blobdiff