diff options
Diffstat (limited to 'src/librbd/deep_copy/ImageCopyRequest.cc')
| -rw-r--r-- | src/librbd/deep_copy/ImageCopyRequest.cc | 187 |
1 files changed, 187 insertions, 0 deletions
diff --git a/src/librbd/deep_copy/ImageCopyRequest.cc b/src/librbd/deep_copy/ImageCopyRequest.cc new file mode 100644 index 00000000..62e5409c --- /dev/null +++ b/src/librbd/deep_copy/ImageCopyRequest.cc @@ -0,0 +1,187 @@ +// -*- 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 "common/errno.h" +#include "librbd/Utils.h" +#include "librbd/deep_copy/Utils.h" +#include "librbd/image/CloseRequest.h" +#include "librbd/image/OpenRequest.h" +#include "osdc/Striper.h" + +#define dout_subsys ceph_subsys_rbd +#undef dout_prefix +#define dout_prefix *_dout << "librbd::deep_copy::ImageCopyRequest: " \ + << this << " " << __func__ << ": " + +namespace librbd { +namespace deep_copy { + +using librbd::util::create_context_callback; +using librbd::util::unique_lock_name; + +template <typename I> +ImageCopyRequest<I>::ImageCopyRequest(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, + const ObjectNumber &object_number, + const SnapSeqs &snap_seqs, + ProgressContext *prog_ctx, + 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_object_number(object_number), m_snap_seqs(snap_seqs), + m_prog_ctx(prog_ctx), m_on_finish(on_finish), m_cct(dst_image_ctx->cct), + m_lock(unique_lock_name("ImageCopyRequest::m_lock", this)) { +} + +template <typename I> +void ImageCopyRequest<I>::send() { + m_dst_image_ctx->snap_lock.get_read(); + util::compute_snap_map(m_dst_image_ctx->cct, m_src_snap_id_start, + m_src_snap_id_end, m_dst_image_ctx->snaps, m_snap_seqs, + &m_snap_map); + m_dst_image_ctx->snap_lock.put_read(); + + if (m_snap_map.empty()) { + lderr(m_cct) << "failed to map snapshots within boundary" << dendl; + finish(-EINVAL); + return; + } + + send_object_copies(); +} + +template <typename I> +void ImageCopyRequest<I>::cancel() { + Mutex::Locker locker(m_lock); + + ldout(m_cct, 20) << dendl; + m_canceled = true; +} + +template <typename I> +void ImageCopyRequest<I>::send_object_copies() { + m_object_no = 0; + if (m_object_number) { + m_object_no = *m_object_number + 1; + } + + uint64_t size; + { + RWLock::RLocker snap_locker(m_src_image_ctx->snap_lock); + size = m_src_image_ctx->get_image_size(CEPH_NOSNAP); + for (auto snap_id : m_src_image_ctx->snaps) { + size = std::max(size, m_src_image_ctx->get_image_size(snap_id)); + } + } + m_end_object_no = Striper::get_num_objects(m_dst_image_ctx->layout, size); + + ldout(m_cct, 20) << "start_object=" << m_object_no << ", " + << "end_object=" << m_end_object_no << dendl; + + bool complete; + { + Mutex::Locker locker(m_lock); + for (uint64_t i = 0; + i < m_src_image_ctx->config.template get_val<uint64_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) && !m_updating_progress; + } + + if (complete) { + finish(m_ret_val); + } +} + +template <typename I> +void ImageCopyRequest<I>::send_next_object_copy() { + ceph_assert(m_lock.is_locked()); + + if (m_canceled && m_ret_val == 0) { + ldout(m_cct, 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++; + + ldout(m_cct, 20) << "object_num=" << ono << dendl; + + ++m_current_ops; + + Context *ctx = new FunctionContext( + [this, ono](int r) { + handle_object_copy(ono, r); + }); + ObjectCopyRequest<I> *req = ObjectCopyRequest<I>::create( + m_src_image_ctx, m_dst_image_ctx, m_src_snap_id_start, m_dst_snap_id_start, + m_snap_map, ono, m_flatten, ctx); + req->send(); +} + +template <typename I> +void ImageCopyRequest<I>::handle_object_copy(uint64_t object_no, int r) { + ldout(m_cct, 20) << "object_no=" << object_no << ", r=" << r << dendl; + + bool complete; + { + Mutex::Locker locker(m_lock); + ceph_assert(m_current_ops > 0); + --m_current_ops; + + if (r < 0 && r != -ENOENT) { + lderr(m_cct) << "object copy failed: " << cpp_strerror(r) << dendl; + if (m_ret_val == 0) { + m_ret_val = r; + } + } else { + m_copied_objects.push(object_no); + while (!m_updating_progress && !m_copied_objects.empty() && + m_copied_objects.top() == + (m_object_number ? *m_object_number + 1 : 0)) { + m_object_number = m_copied_objects.top(); + m_copied_objects.pop(); + uint64_t progress_object_no = *m_object_number + 1; + m_updating_progress = true; + m_lock.Unlock(); + m_prog_ctx->update_progress(progress_object_no, m_end_object_no); + m_lock.Lock(); + ceph_assert(m_updating_progress); + m_updating_progress = false; + } + } + + send_next_object_copy(); + complete = (m_current_ops == 0) && !m_updating_progress; + } + + if (complete) { + finish(m_ret_val); + } +} + +template <typename I> +void ImageCopyRequest<I>::finish(int r) { + ldout(m_cct, 20) << "r=" << r << dendl; + + m_on_finish->complete(r); + put(); +} + +} // namespace deep_copy +} // namespace librbd + +template class librbd::deep_copy::ImageCopyRequest<librbd::ImageCtx>; |