+++ /dev/null
-// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
-// vim: ts=8 sw=2 smarttab
-
-#include "ImageSync.h"
-#include "InstanceWatcher.h"
-#include "ProgressContext.h"
-#include "common/errno.h"
-#include "journal/Journaler.h"
-#include "librbd/ExclusiveLock.h"
-#include "librbd/ImageCtx.h"
-#include "librbd/ObjectMap.h"
-#include "librbd/Utils.h"
-#include "librbd/journal/Types.h"
-#include "tools/rbd_mirror/image_sync/ImageCopyRequest.h"
-#include "tools/rbd_mirror/image_sync/SnapshotCopyRequest.h"
-#include "tools/rbd_mirror/image_sync/SyncPointCreateRequest.h"
-#include "tools/rbd_mirror/image_sync/SyncPointPruneRequest.h"
-
-#define dout_context g_ceph_context
-#define dout_subsys ceph_subsys_rbd_mirror
-#undef dout_prefix
-#define dout_prefix *_dout << "rbd::mirror::ImageSync: " \
- << this << " " << __func__
-
-namespace rbd {
-namespace mirror {
-
-using namespace image_sync;
-using librbd::util::create_context_callback;
-using librbd::util::unique_lock_name;
-
-template <typename I>
-ImageSync<I>::ImageSync(I *local_image_ctx, I *remote_image_ctx,
- SafeTimer *timer, Mutex *timer_lock,
- const std::string &mirror_uuid, Journaler *journaler,
- MirrorPeerClientMeta *client_meta,
- ContextWQ *work_queue,
- InstanceWatcher<I> *instance_watcher,
- Context *on_finish, ProgressContext *progress_ctx)
- : BaseRequest("rbd::mirror::ImageSync", 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_mirror_uuid(mirror_uuid),
- m_journaler(journaler), m_client_meta(client_meta),
- m_work_queue(work_queue), m_instance_watcher(instance_watcher),
- m_progress_ctx(progress_ctx),
- m_lock(unique_lock_name("ImageSync::m_lock", this)) {
-}
-
-template <typename I>
-ImageSync<I>::~ImageSync() {
- assert(m_snapshot_copy_request == nullptr);
- assert(m_image_copy_request == nullptr);
-}
-
-template <typename I>
-void ImageSync<I>::send() {
- send_notify_sync_request();
-}
-
-template <typename I>
-void ImageSync<I>::cancel() {
- Mutex::Locker locker(m_lock);
-
- dout(20) << dendl;
-
- m_canceled = true;
-
- if (m_instance_watcher->cancel_sync_request(m_local_image_ctx->id)) {
- return;
- }
-
- if (m_snapshot_copy_request != nullptr) {
- m_snapshot_copy_request->cancel();
- }
-
- if (m_image_copy_request != nullptr) {
- m_image_copy_request->cancel();
- }
-}
-
-template <typename I>
-void ImageSync<I>::send_notify_sync_request() {
- update_progress("NOTIFY_SYNC_REQUEST");
-
- dout(20) << dendl;
-
- Context *ctx = create_context_callback<
- ImageSync<I>, &ImageSync<I>::handle_notify_sync_request>(this);
- m_instance_watcher->notify_sync_request(m_local_image_ctx->id, ctx);
-}
-
-template <typename I>
-void ImageSync<I>::handle_notify_sync_request(int r) {
- dout(20) << ": r=" << r << dendl;
-
- if (r < 0) {
- BaseRequest::finish(r);
- return;
- }
-
- send_prune_catch_up_sync_point();
-}
-
-template <typename I>
-void ImageSync<I>::send_prune_catch_up_sync_point() {
- update_progress("PRUNE_CATCH_UP_SYNC_POINT");
-
- if (m_client_meta->sync_points.empty()) {
- send_create_sync_point();
- return;
- }
-
- dout(20) << dendl;
-
- // prune will remove sync points with missing snapshots and
- // ensure we have a maximum of one sync point (in case we
- // restarted)
- Context *ctx = create_context_callback<
- ImageSync<I>, &ImageSync<I>::handle_prune_catch_up_sync_point>(this);
- SyncPointPruneRequest<I> *request = SyncPointPruneRequest<I>::create(
- m_remote_image_ctx, false, m_journaler, m_client_meta, ctx);
- request->send();
-}
-
-template <typename I>
-void ImageSync<I>::handle_prune_catch_up_sync_point(int r) {
- dout(20) << ": r=" << r << dendl;
-
- if (r < 0) {
- derr << ": failed to prune catch-up sync point: "
- << cpp_strerror(r) << dendl;
- finish(r);
- return;
- }
-
- send_create_sync_point();
-}
-
-template <typename I>
-void ImageSync<I>::send_create_sync_point() {
- update_progress("CREATE_SYNC_POINT");
-
- // TODO: when support for disconnecting laggy clients is added,
- // re-connect and create catch-up sync point
- if (m_client_meta->sync_points.size() > 0) {
- send_copy_snapshots();
- return;
- }
-
- dout(20) << dendl;
-
- Context *ctx = create_context_callback<
- ImageSync<I>, &ImageSync<I>::handle_create_sync_point>(this);
- SyncPointCreateRequest<I> *request = SyncPointCreateRequest<I>::create(
- m_remote_image_ctx, m_mirror_uuid, m_journaler, m_client_meta, ctx);
- request->send();
-}
-
-template <typename I>
-void ImageSync<I>::handle_create_sync_point(int r) {
- dout(20) << ": r=" << r << dendl;
-
- if (r < 0) {
- derr << ": failed to create sync point: " << cpp_strerror(r)
- << dendl;
- finish(r);
- return;
- }
-
- send_copy_snapshots();
-}
-
-template <typename I>
-void ImageSync<I>::send_copy_snapshots() {
- m_lock.Lock();
- if (m_canceled) {
- m_lock.Unlock();
- finish(-ECANCELED);
- return;
- }
-
- dout(20) << dendl;
-
- Context *ctx = create_context_callback<
- ImageSync<I>, &ImageSync<I>::handle_copy_snapshots>(this);
- m_snapshot_copy_request = SnapshotCopyRequest<I>::create(
- m_local_image_ctx, m_remote_image_ctx, &m_snap_map, m_journaler,
- m_client_meta, m_work_queue, ctx);
- m_snapshot_copy_request->get();
- m_lock.Unlock();
-
- update_progress("COPY_SNAPSHOTS");
-
- m_snapshot_copy_request->send();
-}
-
-template <typename I>
-void ImageSync<I>::handle_copy_snapshots(int r) {
- dout(20) << ": r=" << r << dendl;
-
- {
- Mutex::Locker locker(m_lock);
- m_snapshot_copy_request->put();
- m_snapshot_copy_request = nullptr;
- if (r == 0 && m_canceled) {
- r = -ECANCELED;
- }
- }
-
- if (r == -ECANCELED) {
- dout(10) << ": snapshot copy canceled" << dendl;
- finish(r);
- return;
- } else if (r < 0) {
- derr << ": failed to copy snapshot metadata: " << cpp_strerror(r) << dendl;
- finish(r);
- return;
- }
-
- send_copy_image();
-}
-
-template <typename I>
-void ImageSync<I>::send_copy_image() {
- m_lock.Lock();
- if (m_canceled) {
- m_lock.Unlock();
- finish(-ECANCELED);
- return;
- }
-
- dout(20) << dendl;
-
- Context *ctx = create_context_callback<
- ImageSync<I>, &ImageSync<I>::handle_copy_image>(this);
- m_image_copy_request = ImageCopyRequest<I>::create(
- m_local_image_ctx, m_remote_image_ctx, m_timer, m_timer_lock,
- m_journaler, m_client_meta, &m_client_meta->sync_points.front(),
- ctx, m_progress_ctx);
- m_image_copy_request->get();
- m_lock.Unlock();
-
- update_progress("COPY_IMAGE");
-
- m_image_copy_request->send();
-}
-
-template <typename I>
-void ImageSync<I>::handle_copy_image(int r) {
- dout(20) << ": r=" << r << dendl;
-
- {
- Mutex::Locker locker(m_lock);
- m_image_copy_request->put();
- m_image_copy_request = nullptr;
- if (r == 0 && m_canceled) {
- r = -ECANCELED;
- }
- }
-
- if (r == -ECANCELED) {
- dout(10) << ": image copy canceled" << dendl;
- finish(r);
- return;
- } else if (r < 0) {
- derr << ": failed to copy image: " << cpp_strerror(r) << dendl;
- finish(r);
- return;
- }
-
- send_copy_object_map();
-}
-
-template <typename I>
-void ImageSync<I>::send_copy_object_map() {
- update_progress("COPY_OBJECT_MAP");
-
- m_local_image_ctx->owner_lock.get_read();
- m_local_image_ctx->snap_lock.get_read();
- if (!m_local_image_ctx->test_features(RBD_FEATURE_OBJECT_MAP,
- m_local_image_ctx->snap_lock)) {
- m_local_image_ctx->snap_lock.put_read();
- m_local_image_ctx->owner_lock.put_read();
- send_prune_sync_points();
- return;
- }
-
- assert(m_local_image_ctx->object_map != nullptr);
-
- assert(!m_client_meta->sync_points.empty());
- librbd::journal::MirrorPeerSyncPoint &sync_point =
- m_client_meta->sync_points.front();
- auto snap_id_it = m_local_image_ctx->snap_ids.find(
- {cls::rbd::UserSnapshotNamespace(), sync_point.snap_name});
- assert(snap_id_it != m_local_image_ctx->snap_ids.end());
- librados::snap_t snap_id = snap_id_it->second;
-
- dout(20) << ": snap_id=" << snap_id << ", "
- << "snap_name=" << sync_point.snap_name << dendl;
-
- Context *finish_op_ctx = nullptr;
- if (m_local_image_ctx->exclusive_lock != nullptr) {
- finish_op_ctx = m_local_image_ctx->exclusive_lock->start_op();
- }
- if (finish_op_ctx == nullptr) {
- derr << ": lost exclusive lock" << dendl;
- m_local_image_ctx->snap_lock.put_read();
- m_local_image_ctx->owner_lock.put_read();
- finish(-EROFS);
- return;
- }
-
- // rollback the object map (copy snapshot object map to HEAD)
- RWLock::WLocker object_map_locker(m_local_image_ctx->object_map_lock);
- auto ctx = new FunctionContext([this, finish_op_ctx](int r) {
- handle_copy_object_map(r);
- finish_op_ctx->complete(0);
- });
- m_local_image_ctx->object_map->rollback(snap_id, ctx);
- m_local_image_ctx->snap_lock.put_read();
- m_local_image_ctx->owner_lock.put_read();
-}
-
-template <typename I>
-void ImageSync<I>::handle_copy_object_map(int r) {
- dout(20) << dendl;
-
- assert(r == 0);
- send_refresh_object_map();
-}
-
-template <typename I>
-void ImageSync<I>::send_refresh_object_map() {
- dout(20) << dendl;
-
- update_progress("REFRESH_OBJECT_MAP");
-
- Context *ctx = create_context_callback<
- ImageSync<I>, &ImageSync<I>::handle_refresh_object_map>(this);
- m_object_map = m_local_image_ctx->create_object_map(CEPH_NOSNAP);
- m_object_map->open(ctx);
-}
-
-template <typename I>
-void ImageSync<I>::handle_refresh_object_map(int r) {
- dout(20) << dendl;
-
- assert(r == 0);
- {
- RWLock::WLocker snap_locker(m_local_image_ctx->snap_lock);
- std::swap(m_local_image_ctx->object_map, m_object_map);
- }
- delete m_object_map;
-
- send_prune_sync_points();
-}
-
-template <typename I>
-void ImageSync<I>::send_prune_sync_points() {
- dout(20) << dendl;
-
- update_progress("PRUNE_SYNC_POINTS");
-
- Context *ctx = create_context_callback<
- ImageSync<I>, &ImageSync<I>::handle_prune_sync_points>(this);
- SyncPointPruneRequest<I> *request = SyncPointPruneRequest<I>::create(
- m_remote_image_ctx, true, m_journaler, m_client_meta, ctx);
- request->send();
-}
-
-template <typename I>
-void ImageSync<I>::handle_prune_sync_points(int r) {
- dout(20) << ": r=" << r << dendl;
-
- if (r < 0) {
- derr << ": failed to prune sync point: "
- << cpp_strerror(r) << dendl;
- finish(r);
- return;
- }
-
- if (!m_client_meta->sync_points.empty()) {
- send_copy_image();
- return;
- }
-
- finish(0);
-}
-
-template <typename I>
-void ImageSync<I>::update_progress(const std::string &description) {
- dout(20) << ": " << description << dendl;
-
- if (m_progress_ctx) {
- m_progress_ctx->update_progress("IMAGE_SYNC/" + description);
- }
-}
-
-template <typename I>
-void ImageSync<I>::finish(int r) {
- dout(20) << ": r=" << r << dendl;
-
- m_instance_watcher->notify_sync_complete(m_local_image_ctx->id);
- BaseRequest::finish(r);
-}
-
-} // namespace mirror
-} // namespace rbd
-
-template class rbd::mirror::ImageSync<librbd::ImageCtx>;
Code Review / stor4nfv.git / blobdiff