+++ /dev/null
-// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
-// vim: ts=8 sw=2 smarttab
-
-#include "SyncPointPruneRequest.h"
-#include "common/errno.h"
-#include "journal/Journaler.h"
-#include "librbd/ImageCtx.h"
-#include "librbd/ImageState.h"
-#include "librbd/Operations.h"
-#include "librbd/Utils.h"
-#include <set>
-
-#define dout_context g_ceph_context
-#define dout_subsys ceph_subsys_rbd_mirror
-#undef dout_prefix
-#define dout_prefix *_dout << "rbd::mirror::image_sync::SyncPointPruneRequest: " \
- << this << " " << __func__
-namespace rbd {
-namespace mirror {
-namespace image_sync {
-
-using librbd::util::create_context_callback;
-
-template <typename I>
-SyncPointPruneRequest<I>::SyncPointPruneRequest(I *remote_image_ctx,
- bool sync_complete,
- Journaler *journaler,
- MirrorPeerClientMeta *client_meta,
- Context *on_finish)
- : m_remote_image_ctx(remote_image_ctx), m_sync_complete(sync_complete),
- m_journaler(journaler), m_client_meta(client_meta), m_on_finish(on_finish),
- m_client_meta_copy(*client_meta) {
-}
-
-template <typename I>
-void SyncPointPruneRequest<I>::send() {
- if (m_client_meta->sync_points.empty()) {
- send_remove_snap();
- return;
- }
-
- if (m_sync_complete) {
- // if sync is complete, we can remove the master sync point
- auto it = m_client_meta_copy.sync_points.begin();
- MirrorPeerSyncPoint &sync_point = *it;
-
- ++it;
- if (it == m_client_meta_copy.sync_points.end() ||
- it->from_snap_name != sync_point.snap_name) {
- m_snap_names.push_back(sync_point.snap_name);
- }
-
- if (!sync_point.from_snap_name.empty()) {
- m_snap_names.push_back(sync_point.from_snap_name);
- }
- } else {
- // if we have more than one sync point or invalid sync points,
- // trim them off
- RWLock::RLocker snap_locker(m_remote_image_ctx->snap_lock);
- std::set<std::string> snap_names;
- for (auto it = m_client_meta_copy.sync_points.rbegin();
- it != m_client_meta_copy.sync_points.rend(); ++it) {
- MirrorPeerSyncPoint &sync_point = *it;
- if (&sync_point == &m_client_meta_copy.sync_points.front()) {
- if (m_remote_image_ctx->get_snap_id(
- cls::rbd::UserSnapshotNamespace(), sync_point.snap_name) ==
- CEPH_NOSNAP) {
- derr << ": failed to locate sync point snapshot: "
- << sync_point.snap_name << dendl;
- } else if (!sync_point.from_snap_name.empty()) {
- derr << ": unexpected from_snap_name in primary sync point: "
- << sync_point.from_snap_name << dendl;
- } else {
- // first sync point is OK -- keep it
- break;
- }
- m_invalid_master_sync_point = true;
- }
-
- if (snap_names.count(sync_point.snap_name) == 0) {
- snap_names.insert(sync_point.snap_name);
- m_snap_names.push_back(sync_point.snap_name);
- }
-
- MirrorPeerSyncPoint &front_sync_point =
- m_client_meta_copy.sync_points.front();
- if (!sync_point.from_snap_name.empty() &&
- snap_names.count(sync_point.from_snap_name) == 0 &&
- sync_point.from_snap_name != front_sync_point.snap_name) {
- snap_names.insert(sync_point.from_snap_name);
- m_snap_names.push_back(sync_point.from_snap_name);
- }
- }
- }
-
- send_remove_snap();
-}
-
-template <typename I>
-void SyncPointPruneRequest<I>::send_remove_snap() {
- if (m_snap_names.empty()) {
- send_refresh_image();
- return;
- }
-
- const std::string &snap_name = m_snap_names.front();
-
- dout(20) << ": snap_name=" << snap_name << dendl;
-
- Context *ctx = create_context_callback<
- SyncPointPruneRequest<I>, &SyncPointPruneRequest<I>::handle_remove_snap>(
- this);
- m_remote_image_ctx->operations->snap_remove(cls::rbd::UserSnapshotNamespace(),
- snap_name.c_str(),
- ctx);
-}
-
-template <typename I>
-void SyncPointPruneRequest<I>::handle_remove_snap(int r) {
- dout(20) << ": r=" << r << dendl;
-
- assert(!m_snap_names.empty());
- std::string snap_name = m_snap_names.front();
- m_snap_names.pop_front();
-
- if (r == -ENOENT) {
- r = 0;
- }
- if (r < 0) {
- derr << ": failed to remove snapshot '" << snap_name << "': "
- << cpp_strerror(r) << dendl;
- finish(r);
- return;
- }
-
- send_remove_snap();
-}
-
-template <typename I>
-void SyncPointPruneRequest<I>::send_refresh_image() {
- dout(20) << dendl;
-
- Context *ctx = create_context_callback<
- SyncPointPruneRequest<I>, &SyncPointPruneRequest<I>::handle_refresh_image>(
- this);
- m_remote_image_ctx->state->refresh(ctx);
-}
-
-template <typename I>
-void SyncPointPruneRequest<I>::handle_refresh_image(int r) {
- dout(20) << ": r=" << r << dendl;
-
- if (r < 0) {
- derr << ": remote image refresh failed: " << cpp_strerror(r) << dendl;
- finish(r);
- return;
- }
-
- send_update_client();
-}
-
-template <typename I>
-void SyncPointPruneRequest<I>::send_update_client() {
- dout(20) << dendl;
-
- if (m_sync_complete) {
- m_client_meta_copy.sync_points.pop_front();
- if (m_client_meta_copy.sync_points.empty()) {
- m_client_meta_copy.state = librbd::journal::MIRROR_PEER_STATE_REPLAYING;
- }
- } else {
- while (m_client_meta_copy.sync_points.size() > 1) {
- m_client_meta_copy.sync_points.pop_back();
- }
- if (m_invalid_master_sync_point) {
- // all subsequent sync points would have been pruned
- m_client_meta_copy.sync_points.clear();
- }
- }
-
- bufferlist client_data_bl;
- librbd::journal::ClientData client_data(m_client_meta_copy);
- ::encode(client_data, client_data_bl);
-
- Context *ctx = create_context_callback<
- SyncPointPruneRequest<I>, &SyncPointPruneRequest<I>::handle_update_client>(
- this);
- m_journaler->update_client(client_data_bl, ctx);
-}
-
-template <typename I>
-void SyncPointPruneRequest<I>::handle_update_client(int r) {
- dout(20) << ": r=" << r << dendl;
-
- if (r < 0) {
- derr << ": failed to update client data: " << cpp_strerror(r)
- << dendl;
- finish(r);
- return;
- }
-
- // update provided meta structure to reflect reality
- *m_client_meta = m_client_meta_copy;
- finish(0);
-}
-
-template <typename I>
-void SyncPointPruneRequest<I>::finish(int r) {
- dout(20) << ": r=" << r << dendl;
-
- m_on_finish->complete(r);
- delete this;
-}
-
-} // namespace image_sync
-} // namespace mirror
-} // namespace rbd
-
-template class rbd::mirror::image_sync::SyncPointPruneRequest<librbd::ImageCtx>;
Code Review / stor4nfv.git / blobdiff