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-rw-r--r--src/librbd/deep_copy/SnapshotCopyRequest.cc730
1 files changed, 730 insertions, 0 deletions
diff --git a/src/librbd/deep_copy/SnapshotCopyRequest.cc b/src/librbd/deep_copy/SnapshotCopyRequest.cc
new file mode 100644
index 00000000..d1375a42
--- /dev/null
+++ b/src/librbd/deep_copy/SnapshotCopyRequest.cc
@@ -0,0 +1,730 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#include "SnapshotCopyRequest.h"
+#include "SetHeadRequest.h"
+#include "SnapshotCreateRequest.h"
+#include "common/errno.h"
+#include "common/WorkQueue.h"
+#include "librbd/ExclusiveLock.h"
+#include "librbd/ObjectMap.h"
+#include "librbd/Operations.h"
+#include "librbd/Utils.h"
+#include "osdc/Striper.h"
+
+#define dout_subsys ceph_subsys_rbd
+#undef dout_prefix
+#define dout_prefix *_dout << "librbd::deep_copy::SnapshotCopyRequest: " \
+ << this << " " << __func__ << ": "
+
+namespace librbd {
+namespace deep_copy {
+
+namespace {
+
+template <typename I>
+const std::string &get_snapshot_name(I *image_ctx, librados::snap_t snap_id) {
+ auto snap_it = std::find_if(image_ctx->snap_ids.begin(),
+ image_ctx->snap_ids.end(),
+ [snap_id](
+ const std::pair<
+ std::pair<cls::rbd::SnapshotNamespace,
+ std::string>,
+ librados::snap_t> &pair) {
+ return pair.second == snap_id;
+ });
+ ceph_assert(snap_it != image_ctx->snap_ids.end());
+ return snap_it->first.second;
+}
+
+} // anonymous namespace
+
+using librbd::util::create_context_callback;
+using librbd::util::unique_lock_name;
+
+template <typename I>
+SnapshotCopyRequest<I>::SnapshotCopyRequest(I *src_image_ctx,
+ I *dst_image_ctx,
+ librados::snap_t src_snap_id_start,
+ librados::snap_t src_snap_id_end,
+ librados::snap_t dst_snap_id_start,
+ bool flatten, ContextWQ *work_queue,
+ SnapSeqs *snap_seqs,
+ Context *on_finish)
+ : RefCountedObject(dst_image_ctx->cct, 1), m_src_image_ctx(src_image_ctx),
+ m_dst_image_ctx(dst_image_ctx), m_src_snap_id_start(src_snap_id_start),
+ m_src_snap_id_end(src_snap_id_end), m_dst_snap_id_start(dst_snap_id_start),
+ m_flatten(flatten), m_work_queue(work_queue), m_snap_seqs_result(snap_seqs),
+ m_snap_seqs(*snap_seqs), m_on_finish(on_finish), m_cct(dst_image_ctx->cct),
+ m_lock(unique_lock_name("SnapshotCopyRequest::m_lock", this)) {
+ ceph_assert((m_src_snap_id_start == 0 && m_dst_snap_id_start == 0) ||
+ (m_src_snap_id_start > 0 && m_dst_snap_id_start > 0));
+
+ // snap ids ordered from oldest to newest
+ m_src_image_ctx->snap_lock.get_read();
+ m_src_snap_ids.insert(src_image_ctx->snaps.begin(),
+ src_image_ctx->snaps.end());
+ m_src_image_ctx->snap_lock.put_read();
+
+ m_dst_image_ctx->snap_lock.get_read();
+ m_dst_snap_ids.insert(dst_image_ctx->snaps.begin(),
+ dst_image_ctx->snaps.end());
+ m_dst_image_ctx->snap_lock.put_read();
+
+ if (m_src_snap_id_end != CEPH_NOSNAP) {
+ m_src_snap_ids.erase(m_src_snap_ids.upper_bound(m_src_snap_id_end),
+ m_src_snap_ids.end());
+ }
+}
+
+template <typename I>
+void SnapshotCopyRequest<I>::send() {
+ cls::rbd::ParentImageSpec src_parent_spec;
+ int r = validate_parent(m_src_image_ctx, &src_parent_spec);
+ if (r < 0) {
+ lderr(m_cct) << "source image parent spec mismatch" << dendl;
+ error(r);
+ return;
+ }
+
+ r = validate_parent(m_dst_image_ctx, &m_dst_parent_spec);
+ if (r < 0) {
+ lderr(m_cct) << "destination image parent spec mismatch" << dendl;
+ error(r);
+ return;
+ }
+
+ send_snap_unprotect();
+}
+
+template <typename I>
+void SnapshotCopyRequest<I>::cancel() {
+ Mutex::Locker locker(m_lock);
+
+ ldout(m_cct, 20) << dendl;
+ m_canceled = true;
+}
+
+template <typename I>
+void SnapshotCopyRequest<I>::send_snap_unprotect() {
+
+ SnapIdSet::iterator snap_id_it = m_dst_snap_ids.begin();
+ if (m_prev_snap_id != CEPH_NOSNAP) {
+ snap_id_it = m_dst_snap_ids.upper_bound(m_prev_snap_id);
+ } else if (m_dst_snap_id_start > 0) {
+ snap_id_it = m_dst_snap_ids.upper_bound(m_dst_snap_id_start);
+ }
+
+ for (; snap_id_it != m_dst_snap_ids.end(); ++snap_id_it) {
+ librados::snap_t dst_snap_id = *snap_id_it;
+
+ m_dst_image_ctx->snap_lock.get_read();
+
+ bool dst_unprotected;
+ int r = m_dst_image_ctx->is_snap_unprotected(dst_snap_id, &dst_unprotected);
+ if (r < 0) {
+ lderr(m_cct) << "failed to retrieve destination snap unprotect status: "
+ << cpp_strerror(r) << dendl;
+ m_dst_image_ctx->snap_lock.put_read();
+ finish(r);
+ return;
+ }
+ m_dst_image_ctx->snap_lock.put_read();
+
+ if (dst_unprotected) {
+ // snap is already unprotected -- check next snap
+ continue;
+ }
+
+ // if destination snapshot is protected and (1) it isn't in our mapping
+ // table, or (2) the source snapshot isn't protected, unprotect it
+ auto snap_seq_it = std::find_if(
+ m_snap_seqs.begin(), m_snap_seqs.end(),
+ [dst_snap_id](const SnapSeqs::value_type& pair) {
+ return pair.second == dst_snap_id;
+ });
+
+ if (snap_seq_it != m_snap_seqs.end()) {
+ m_src_image_ctx->snap_lock.get_read();
+ bool src_unprotected;
+ r = m_src_image_ctx->is_snap_unprotected(snap_seq_it->first,
+ &src_unprotected);
+ ldout(m_cct, 20) << "m_src_image_ctx->is_snap_unprotected("
+ << snap_seq_it->first << "): r=" << r
+ << ", src_unprotected=" << src_unprotected << dendl;
+ if (r == -ENOENT) {
+ src_unprotected = true;
+ r = 0;
+ }
+ if (r < 0) {
+ lderr(m_cct) << "failed to retrieve source snap unprotect status: "
+ << cpp_strerror(r) << dendl;
+ m_src_image_ctx->snap_lock.put_read();
+ finish(r);
+ return;
+ }
+ m_src_image_ctx->snap_lock.put_read();
+
+ if (src_unprotected) {
+ // source is unprotected -- unprotect destination snap
+ break;
+ }
+ } else {
+ // source snapshot doesn't exist -- unprotect destination snap
+ break;
+ }
+ }
+
+ if (snap_id_it == m_dst_snap_ids.end()) {
+ // no destination snapshots to unprotect
+ m_prev_snap_id = CEPH_NOSNAP;
+ send_snap_remove();
+ return;
+ }
+
+ m_prev_snap_id = *snap_id_it;
+ m_snap_name = get_snapshot_name(m_dst_image_ctx, m_prev_snap_id);
+
+ ldout(m_cct, 20) << "snap_name=" << m_snap_name << ", "
+ << "snap_id=" << m_prev_snap_id << dendl;
+
+ int r;
+ auto finish_op_ctx = start_lock_op(&r);
+ if (finish_op_ctx == nullptr) {
+ lderr(m_cct) << "lost exclusive lock" << dendl;
+ finish(r);
+ return;
+ }
+
+ auto ctx = new FunctionContext([this, finish_op_ctx](int r) {
+ handle_snap_unprotect(r);
+ finish_op_ctx->complete(0);
+ });
+ RWLock::RLocker owner_locker(m_dst_image_ctx->owner_lock);
+ m_dst_image_ctx->operations->execute_snap_unprotect(
+ cls::rbd::UserSnapshotNamespace(), m_snap_name.c_str(), ctx);
+}
+
+template <typename I>
+void SnapshotCopyRequest<I>::handle_snap_unprotect(int r) {
+ ldout(m_cct, 20) << "r=" << r << dendl;
+
+ if (r < 0) {
+ lderr(m_cct) << "failed to unprotect snapshot '" << m_snap_name << "': "
+ << cpp_strerror(r) << dendl;
+ finish(r);
+ return;
+ }
+
+ {
+ // avoid the need to refresh to delete the newly unprotected snapshot
+ RWLock::RLocker snap_locker(m_dst_image_ctx->snap_lock);
+ auto snap_info_it = m_dst_image_ctx->snap_info.find(m_prev_snap_id);
+ if (snap_info_it != m_dst_image_ctx->snap_info.end()) {
+ snap_info_it->second.protection_status =
+ RBD_PROTECTION_STATUS_UNPROTECTED;
+ }
+ }
+
+ if (handle_cancellation()) {
+ return;
+ }
+
+ send_snap_unprotect();
+}
+
+template <typename I>
+void SnapshotCopyRequest<I>::send_snap_remove() {
+ SnapIdSet::iterator snap_id_it = m_dst_snap_ids.begin();
+ if (m_prev_snap_id != CEPH_NOSNAP) {
+ snap_id_it = m_dst_snap_ids.upper_bound(m_prev_snap_id);
+ } else if (m_dst_snap_id_start > 0) {
+ snap_id_it = m_dst_snap_ids.upper_bound(m_dst_snap_id_start);
+ }
+
+ for (; snap_id_it != m_dst_snap_ids.end(); ++snap_id_it) {
+ librados::snap_t dst_snap_id = *snap_id_it;
+
+ cls::rbd::SnapshotNamespace snap_namespace;
+ m_dst_image_ctx->snap_lock.get_read();
+ int r = m_dst_image_ctx->get_snap_namespace(dst_snap_id, &snap_namespace);
+ m_dst_image_ctx->snap_lock.put_read();
+ if (r < 0) {
+ lderr(m_cct) << "failed to retrieve destination snap namespace: "
+ << m_snap_name << dendl;
+ finish(r);
+ return;
+ }
+
+ if (boost::get<cls::rbd::UserSnapshotNamespace>(&snap_namespace) ==
+ nullptr) {
+ continue;
+ }
+
+ // if the destination snapshot isn't in our mapping table, remove it
+ auto snap_seq_it = std::find_if(
+ m_snap_seqs.begin(), m_snap_seqs.end(),
+ [dst_snap_id](const SnapSeqs::value_type& pair) {
+ return pair.second == dst_snap_id;
+ });
+
+ if (snap_seq_it == m_snap_seqs.end()) {
+ break;
+ }
+ }
+
+ if (snap_id_it == m_dst_snap_ids.end()) {
+ // no destination snapshots to delete
+ m_prev_snap_id = CEPH_NOSNAP;
+ send_snap_create();
+ return;
+ }
+
+ m_prev_snap_id = *snap_id_it;
+ m_snap_name = get_snapshot_name(m_dst_image_ctx, m_prev_snap_id);
+
+ ldout(m_cct, 20) << ""
+ << "snap_name=" << m_snap_name << ", "
+ << "snap_id=" << m_prev_snap_id << dendl;
+
+ int r;
+ auto finish_op_ctx = start_lock_op(&r);
+ if (finish_op_ctx == nullptr) {
+ lderr(m_cct) << "lost exclusive lock" << dendl;
+ finish(r);
+ return;
+ }
+
+ auto ctx = new FunctionContext([this, finish_op_ctx](int r) {
+ handle_snap_remove(r);
+ finish_op_ctx->complete(0);
+ });
+ RWLock::RLocker owner_locker(m_dst_image_ctx->owner_lock);
+ m_dst_image_ctx->operations->execute_snap_remove(
+ cls::rbd::UserSnapshotNamespace(), m_snap_name.c_str(), ctx);
+}
+
+template <typename I>
+void SnapshotCopyRequest<I>::handle_snap_remove(int r) {
+ ldout(m_cct, 20) << "r=" << r << dendl;
+
+ if (r < 0) {
+ lderr(m_cct) << "failed to remove snapshot '" << m_snap_name << "': "
+ << cpp_strerror(r) << dendl;
+ finish(r);
+ return;
+ }
+ if (handle_cancellation()) {
+ return;
+ }
+
+ send_snap_remove();
+}
+
+template <typename I>
+void SnapshotCopyRequest<I>::send_snap_create() {
+ SnapIdSet::iterator snap_id_it = m_src_snap_ids.begin();
+ if (m_prev_snap_id != CEPH_NOSNAP) {
+ snap_id_it = m_src_snap_ids.upper_bound(m_prev_snap_id);
+ } else if (m_src_snap_id_start > 0) {
+ snap_id_it = m_src_snap_ids.upper_bound(m_src_snap_id_start);
+ }
+
+ for (; snap_id_it != m_src_snap_ids.end(); ++snap_id_it) {
+ librados::snap_t src_snap_id = *snap_id_it;
+
+ cls::rbd::SnapshotNamespace snap_namespace;
+ m_src_image_ctx->snap_lock.get_read();
+ int r = m_src_image_ctx->get_snap_namespace(src_snap_id, &snap_namespace);
+ m_src_image_ctx->snap_lock.put_read();
+ if (r < 0) {
+ lderr(m_cct) << "failed to retrieve source snap namespace: "
+ << m_snap_name << dendl;
+ finish(r);
+ return;
+ }
+
+ if (m_snap_seqs.find(src_snap_id) == m_snap_seqs.end()) {
+ // the source snapshot is not in our mapping table, ...
+ if (boost::get<cls::rbd::UserSnapshotNamespace>(&snap_namespace) !=
+ nullptr) {
+ // ... create it since it's a user snapshot
+ break;
+ } else if (src_snap_id == m_src_snap_id_end) {
+ // ... map it to destination HEAD since it's not a user snapshot that we
+ // will create (e.g. MirrorPrimarySnapshotNamespace)
+ m_snap_seqs[src_snap_id] = CEPH_NOSNAP;
+ }
+ }
+ }
+
+ if (snap_id_it == m_src_snap_ids.end()) {
+ // no source snapshots to create
+ m_prev_snap_id = CEPH_NOSNAP;
+ send_snap_protect();
+ return;
+ }
+
+ m_prev_snap_id = *snap_id_it;
+ m_snap_name = get_snapshot_name(m_src_image_ctx, m_prev_snap_id);
+
+ m_src_image_ctx->snap_lock.get_read();
+ auto snap_info_it = m_src_image_ctx->snap_info.find(m_prev_snap_id);
+ if (snap_info_it == m_src_image_ctx->snap_info.end()) {
+ m_src_image_ctx->snap_lock.put_read();
+ lderr(m_cct) << "failed to retrieve source snap info: " << m_snap_name
+ << dendl;
+ finish(-ENOENT);
+ return;
+ }
+
+ uint64_t size = snap_info_it->second.size;
+ m_snap_namespace = snap_info_it->second.snap_namespace;
+ cls::rbd::ParentImageSpec parent_spec;
+ uint64_t parent_overlap = 0;
+ if (!m_flatten && snap_info_it->second.parent.spec.pool_id != -1) {
+ parent_spec = m_dst_parent_spec;
+ parent_overlap = snap_info_it->second.parent.overlap;
+ }
+ m_src_image_ctx->snap_lock.put_read();
+
+ ldout(m_cct, 20) << "snap_name=" << m_snap_name << ", "
+ << "snap_id=" << m_prev_snap_id << ", "
+ << "size=" << size << ", "
+ << "parent_info=["
+ << "pool_id=" << parent_spec.pool_id << ", "
+ << "image_id=" << parent_spec.image_id << ", "
+ << "snap_id=" << parent_spec.snap_id << ", "
+ << "overlap=" << parent_overlap << "]" << dendl;
+
+ int r;
+ Context *finish_op_ctx = start_lock_op(&r);
+ if (finish_op_ctx == nullptr) {
+ lderr(m_cct) << "lost exclusive lock" << dendl;
+ finish(r);
+ return;
+ }
+
+ auto ctx = new FunctionContext([this, finish_op_ctx](int r) {
+ handle_snap_create(r);
+ finish_op_ctx->complete(0);
+ });
+ SnapshotCreateRequest<I> *req = SnapshotCreateRequest<I>::create(
+ m_dst_image_ctx, m_snap_name, m_snap_namespace, size, parent_spec,
+ parent_overlap, ctx);
+ req->send();
+}
+
+template <typename I>
+void SnapshotCopyRequest<I>::handle_snap_create(int r) {
+ ldout(m_cct, 20) << "r=" << r << dendl;
+
+ if (r < 0) {
+ lderr(m_cct) << "failed to create snapshot '" << m_snap_name << "': "
+ << cpp_strerror(r) << dendl;
+ finish(r);
+ return;
+ }
+ if (handle_cancellation()) {
+ return;
+ }
+
+ ceph_assert(m_prev_snap_id != CEPH_NOSNAP);
+
+ auto snap_it = m_dst_image_ctx->snap_ids.find(
+ {cls::rbd::UserSnapshotNamespace(), m_snap_name});
+ ceph_assert(snap_it != m_dst_image_ctx->snap_ids.end());
+ librados::snap_t dst_snap_id = snap_it->second;
+
+ ldout(m_cct, 20) << "mapping source snap id " << m_prev_snap_id << " to "
+ << dst_snap_id << dendl;
+ m_snap_seqs[m_prev_snap_id] = dst_snap_id;
+
+ send_snap_create();
+}
+
+template <typename I>
+void SnapshotCopyRequest<I>::send_snap_protect() {
+ SnapIdSet::iterator snap_id_it = m_src_snap_ids.begin();
+ if (m_prev_snap_id != CEPH_NOSNAP) {
+ snap_id_it = m_src_snap_ids.upper_bound(m_prev_snap_id);
+ } else if (m_src_snap_id_start > 0) {
+ snap_id_it = m_src_snap_ids.upper_bound(m_src_snap_id_start);
+ }
+
+ for (; snap_id_it != m_src_snap_ids.end(); ++snap_id_it) {
+ librados::snap_t src_snap_id = *snap_id_it;
+
+ m_src_image_ctx->snap_lock.get_read();
+
+ bool src_protected;
+ int r = m_src_image_ctx->is_snap_protected(src_snap_id, &src_protected);
+ if (r < 0) {
+ lderr(m_cct) << "failed to retrieve source snap protect status: "
+ << cpp_strerror(r) << dendl;
+ m_src_image_ctx->snap_lock.put_read();
+ finish(r);
+ return;
+ }
+ m_src_image_ctx->snap_lock.put_read();
+
+ if (!src_protected) {
+ // snap is not protected -- check next snap
+ continue;
+ }
+
+ // if destination snapshot is not protected, protect it
+ auto snap_seq_it = m_snap_seqs.find(src_snap_id);
+ ceph_assert(snap_seq_it != m_snap_seqs.end());
+ if (snap_seq_it->second == CEPH_NOSNAP) {
+ // implies src end snapshot is mapped to a non-copyable snapshot
+ ceph_assert(src_snap_id == m_src_snap_id_end);
+ break;
+ }
+
+ m_dst_image_ctx->snap_lock.get_read();
+ bool dst_protected;
+ r = m_dst_image_ctx->is_snap_protected(snap_seq_it->second, &dst_protected);
+ if (r < 0) {
+ lderr(m_cct) << "failed to retrieve destination snap protect status: "
+ << cpp_strerror(r) << dendl;
+ m_dst_image_ctx->snap_lock.put_read();
+ finish(r);
+ return;
+ }
+ m_dst_image_ctx->snap_lock.put_read();
+
+ if (!dst_protected) {
+ break;
+ }
+ }
+
+ if (snap_id_it == m_src_snap_ids.end()) {
+ // no destination snapshots to protect
+ m_prev_snap_id = CEPH_NOSNAP;
+ send_set_head();
+ return;
+ }
+
+ m_prev_snap_id = *snap_id_it;
+ m_snap_name = get_snapshot_name(m_src_image_ctx, m_prev_snap_id);
+
+ ldout(m_cct, 20) << "snap_name=" << m_snap_name << ", "
+ << "snap_id=" << m_prev_snap_id << dendl;
+
+ int r;
+ auto finish_op_ctx = start_lock_op(&r);
+ if (finish_op_ctx == nullptr) {
+ lderr(m_cct) << "lost exclusive lock" << dendl;
+ finish(r);
+ return;
+ }
+
+ auto ctx = new FunctionContext([this, finish_op_ctx](int r) {
+ handle_snap_protect(r);
+ finish_op_ctx->complete(0);
+ });
+ RWLock::RLocker owner_locker(m_dst_image_ctx->owner_lock);
+ m_dst_image_ctx->operations->execute_snap_protect(
+ cls::rbd::UserSnapshotNamespace(), m_snap_name.c_str(), ctx);
+}
+
+template <typename I>
+void SnapshotCopyRequest<I>::handle_snap_protect(int r) {
+ ldout(m_cct, 20) << "r=" << r << dendl;
+
+ if (r < 0) {
+ lderr(m_cct) << "failed to protect snapshot '" << m_snap_name << "': "
+ << cpp_strerror(r) << dendl;
+ finish(r);
+ return;
+ }
+ if (handle_cancellation()) {
+ return;
+ }
+
+ send_snap_protect();
+}
+
+template <typename I>
+void SnapshotCopyRequest<I>::send_set_head() {
+ auto snap_seq_it = m_snap_seqs.find(m_src_snap_id_end);
+ if (m_src_snap_id_end != CEPH_NOSNAP &&
+ (snap_seq_it == m_snap_seqs.end() ||
+ snap_seq_it->second != CEPH_NOSNAP)) {
+ // not copying to src nor dst HEAD revision
+ finish(0);
+ return;
+ }
+
+ ldout(m_cct, 20) << dendl;
+
+ uint64_t size;
+ cls::rbd::ParentImageSpec parent_spec;
+ uint64_t parent_overlap = 0;
+ {
+ RWLock::RLocker src_locker(m_src_image_ctx->snap_lock);
+ auto snap_info_it = m_src_image_ctx->snap_info.find(m_src_snap_id_end);
+ if (snap_info_it != m_src_image_ctx->snap_info.end()) {
+ auto& snap_info = snap_info_it->second;
+ size = snap_info.size;
+ if (!m_flatten) {
+ parent_spec = snap_info.parent.spec;
+ parent_overlap = snap_info.parent.overlap;
+ }
+ } else {
+ size = m_src_image_ctx->size;
+ if (!m_flatten) {
+ parent_spec = m_src_image_ctx->parent_md.spec;
+ parent_overlap = m_src_image_ctx->parent_md.overlap;
+ }
+ }
+ }
+
+ auto ctx = create_context_callback<
+ SnapshotCopyRequest<I>, &SnapshotCopyRequest<I>::handle_set_head>(this);
+ auto req = SetHeadRequest<I>::create(m_dst_image_ctx, size, parent_spec,
+ parent_overlap, ctx);
+ req->send();
+}
+
+template <typename I>
+void SnapshotCopyRequest<I>::handle_set_head(int r) {
+ ldout(m_cct, 20) << "r=" << r << dendl;
+
+ if (r < 0) {
+ lderr(m_cct) << "failed to set head: " << cpp_strerror(r) << dendl;
+ finish(r);
+ return;
+ }
+
+ if (handle_cancellation()) {
+ return;
+ }
+
+ send_resize_object_map();
+}
+
+template <typename I>
+void SnapshotCopyRequest<I>::send_resize_object_map() {
+ int r = 0;
+
+ if (m_dst_image_ctx->test_features(RBD_FEATURE_OBJECT_MAP)) {
+ RWLock::RLocker owner_locker(m_dst_image_ctx->owner_lock);
+ RWLock::RLocker snap_locker(m_dst_image_ctx->snap_lock);
+
+ if (m_dst_image_ctx->object_map != nullptr &&
+ Striper::get_num_objects(m_dst_image_ctx->layout,
+ m_dst_image_ctx->size) !=
+ m_dst_image_ctx->object_map->size()) {
+
+ ldout(m_cct, 20) << dendl;
+
+ auto finish_op_ctx = start_lock_op(m_dst_image_ctx->owner_lock, &r);
+ if (finish_op_ctx != nullptr) {
+ auto ctx = new FunctionContext([this, finish_op_ctx](int r) {
+ handle_resize_object_map(r);
+ finish_op_ctx->complete(0);
+ });
+
+ m_dst_image_ctx->object_map->aio_resize(m_dst_image_ctx->size,
+ OBJECT_NONEXISTENT, ctx);
+ return;
+ }
+
+ lderr(m_cct) << "lost exclusive lock" << dendl;
+ }
+ }
+
+ finish(r);
+}
+
+template <typename I>
+void SnapshotCopyRequest<I>::handle_resize_object_map(int r) {
+ ldout(m_cct, 20) << "r=" << r << dendl;
+
+ if (r < 0) {
+ lderr(m_cct) << "failed to resize object map: " << cpp_strerror(r)
+ << dendl;
+ finish(r);
+ return;
+ }
+
+ finish(0);
+}
+
+template <typename I>
+bool SnapshotCopyRequest<I>::handle_cancellation() {
+ {
+ Mutex::Locker locker(m_lock);
+ if (!m_canceled) {
+ return false;
+ }
+ }
+ ldout(m_cct, 10) << "snapshot copy canceled" << dendl;
+ finish(-ECANCELED);
+ return true;
+}
+
+template <typename I>
+void SnapshotCopyRequest<I>::error(int r) {
+ ldout(m_cct, 20) << "r=" << r << dendl;
+
+ m_work_queue->queue(new FunctionContext([this, r](int r1) { finish(r); }));
+}
+
+template <typename I>
+int SnapshotCopyRequest<I>::validate_parent(I *image_ctx,
+ cls::rbd::ParentImageSpec *spec) {
+ RWLock::RLocker owner_locker(image_ctx->owner_lock);
+ RWLock::RLocker snap_locker(image_ctx->snap_lock);
+
+ // ensure source image's parent specs are still consistent
+ *spec = image_ctx->parent_md.spec;
+ for (auto &snap_info_pair : image_ctx->snap_info) {
+ auto &parent_spec = snap_info_pair.second.parent.spec;
+ if (parent_spec.pool_id == -1) {
+ continue;
+ } else if (spec->pool_id == -1) {
+ *spec = parent_spec;
+ continue;
+ }
+
+ if (*spec != parent_spec) {
+ return -EINVAL;
+ }
+ }
+ return 0;
+}
+
+template <typename I>
+Context *SnapshotCopyRequest<I>::start_lock_op(int* r) {
+ RWLock::RLocker owner_locker(m_dst_image_ctx->owner_lock);
+ return start_lock_op(m_dst_image_ctx->owner_lock, r);
+}
+
+template <typename I>
+Context *SnapshotCopyRequest<I>::start_lock_op(RWLock &owner_lock, int* r) {
+ ceph_assert(m_dst_image_ctx->owner_lock.is_locked());
+ if (m_dst_image_ctx->exclusive_lock == nullptr) {
+ return new FunctionContext([](int r) {});
+ }
+ return m_dst_image_ctx->exclusive_lock->start_op(r);
+}
+
+template <typename I>
+void SnapshotCopyRequest<I>::finish(int r) {
+ ldout(m_cct, 20) << "r=" << r << dendl;
+
+ if (r == 0) {
+ *m_snap_seqs_result = m_snap_seqs;
+ }
+
+ m_on_finish->complete(r);
+ put();
+}
+
+} // namespace deep_copy
+} // namespace librbd
+
+template class librbd::deep_copy::SnapshotCopyRequest<librbd::ImageCtx>;