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// -*- 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>;
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