} // anonymous namespace
-
-CopyupRequest::CopyupRequest(ImageCtx *ictx, const std::string &oid,
- uint64_t objectno, Extents &&image_extents,
- const ZTracer::Trace &parent_trace)
- : m_ictx(ictx), m_oid(oid), m_object_no(objectno),
+template <typename I>
+CopyupRequest<I>::CopyupRequest(I *ictx, const std::string &oid,
+ uint64_t objectno, Extents &&image_extents,
+ const ZTracer::Trace &parent_trace)
+ : m_ictx(util::get_image_ctx(ictx)), m_oid(oid), m_object_no(objectno),
m_image_extents(image_extents),
m_trace(util::create_trace(*m_ictx, "copy-up", parent_trace)),
- m_state(STATE_READ_FROM_PARENT)
+ m_state(STATE_READ_FROM_PARENT), m_lock("CopyupRequest", false, false)
{
m_async_op.start_op(*m_ictx);
}
-CopyupRequest::~CopyupRequest() {
+template <typename I>
+CopyupRequest<I>::~CopyupRequest() {
assert(m_pending_requests.empty());
m_async_op.finish_op();
}
-void CopyupRequest::append_request(ObjectRequest<> *req) {
+template <typename I>
+void CopyupRequest<I>::append_request(AbstractObjectWriteRequest<I> *req) {
ldout(m_ictx->cct, 20) << req << dendl;
m_pending_requests.push_back(req);
}
-void CopyupRequest::complete_requests(int r) {
+template <typename I>
+void CopyupRequest<I>::complete_requests(int r) {
while (!m_pending_requests.empty()) {
- vector<ObjectRequest<> *>::iterator it = m_pending_requests.begin();
- ObjectRequest<> *req = *it;
+ auto it = m_pending_requests.begin();
+ auto req = *it;
ldout(m_ictx->cct, 20) << "completing request " << req << dendl;
- req->complete(r);
+ req->handle_copyup(r);
m_pending_requests.erase(it);
}
}
-bool CopyupRequest::send_copyup() {
- bool add_copyup_op = !m_copyup_data.is_zero();
+template <typename I>
+bool CopyupRequest<I>::send_copyup() {
bool copy_on_read = m_pending_requests.empty();
- if (!add_copyup_op && copy_on_read) {
- // copyup empty object to prevent future CoR attempts
+ bool add_copyup_op = !m_copyup_data.is_zero();
+ if (!add_copyup_op) {
m_copyup_data.clear();
- add_copyup_op = true;
}
ldout(m_ictx->cct, 20) << "oid " << m_oid << dendl;
std::vector<librados::snap_t> snaps;
- if (!copy_on_read) {
- m_pending_copyups++;
- }
-
+ Mutex::Locker locker(m_lock);
int r;
if (copy_on_read || (!snapc.snaps.empty() && add_copyup_op)) {
- assert(add_copyup_op);
- add_copyup_op = false;
librados::ObjectWriteOperation copyup_op;
copyup_op.exec("rbd", "copyup", m_copyup_data);
+ m_copyup_data.clear();
+
+ ObjectRequest<I>::add_write_hint(*m_ictx, ©up_op);
// send only the copyup request with a blank snapshot context so that
// all snapshots are detected from the parent for this object. If
if (!copy_on_read) {
librados::ObjectWriteOperation write_op;
- if (add_copyup_op) {
- // CoW did not need to handle existing snapshots
- write_op.exec("rbd", "copyup", m_copyup_data);
- }
+ write_op.exec("rbd", "copyup", m_copyup_data);
// merge all pending write ops into this single RADOS op
- for (size_t i=0; i<m_pending_requests.size(); ++i) {
- ObjectRequest<> *req = m_pending_requests[i];
+ ObjectRequest<I>::add_write_hint(*m_ictx, &write_op);
+ for (auto req : m_pending_requests) {
ldout(m_ictx->cct, 20) << "add_copyup_ops " << req << dendl;
- bool set_hints = (i == 0);
- req->add_copyup_ops(&write_op, set_hints);
+ req->add_copyup_ops(&write_op);
}
- assert(write_op.size() != 0);
+
+ m_pending_copyups++;
snaps.insert(snaps.end(), snapc.snaps.begin(), snapc.snaps.end());
librados::AioCompletion *comp = util::create_rados_callback(this);
return false;
}
-bool CopyupRequest::is_copyup_required() {
- bool noop = true;
- for (const ObjectRequest<> *req : m_pending_requests) {
- if (!req->is_op_payload_empty()) {
- noop = false;
- break;
- }
+template <typename I>
+bool CopyupRequest<I>::is_copyup_required() {
+ bool copy_on_read = m_pending_requests.empty();
+ if (copy_on_read) {
+ // always force a copyup if CoR enabled
+ return true;
+ }
+
+ if (!m_copyup_data.is_zero()) {
+ return true;
}
- return (m_copyup_data.is_zero() && noop);
+ for (auto req : m_pending_requests) {
+ if (!req->is_empty_write_op()) {
+ return true;
+ }
+ }
+ return false;
}
-void CopyupRequest::send()
+template <typename I>
+void CopyupRequest<I>::send()
{
m_state = STATE_READ_FROM_PARENT;
AioCompletion *comp = AioCompletion::create_and_start(
ReadResult{&m_copyup_data}, 0, m_trace);
}
-void CopyupRequest::complete(int r)
+template <typename I>
+void CopyupRequest<I>::complete(int r)
{
if (should_complete(r)) {
complete_requests(r);
}
}
-bool CopyupRequest::should_complete(int r)
+template <typename I>
+bool CopyupRequest<I>::should_complete(int r)
{
CephContext *cct = m_ictx->cct;
ldout(cct, 20) << "oid " << m_oid
ldout(cct, 20) << "READ_FROM_PARENT" << dendl;
remove_from_list();
if (r >= 0 || r == -ENOENT) {
- if (is_copyup_required()) {
+ if (!is_copyup_required()) {
ldout(cct, 20) << "nop, skipping" << dendl;
return true;
}
return send_copyup();
case STATE_COPYUP:
- // invoked via a finisher in librados, so thread safe
- pending_copyups = --m_pending_copyups;
+ {
+ Mutex::Locker locker(m_lock);
+ assert(m_pending_copyups > 0);
+ pending_copyups = --m_pending_copyups;
+ }
ldout(cct, 20) << "COPYUP (" << pending_copyups << " pending)"
<< dendl;
if (r == -ENOENT) {
return (r < 0);
}
-void CopyupRequest::remove_from_list()
+template <typename I>
+void CopyupRequest<I>::remove_from_list()
{
Mutex::Locker l(m_ictx->copyup_list_lock);
- map<uint64_t, CopyupRequest*>::iterator it =
- m_ictx->copyup_list.find(m_object_no);
+ auto it = m_ictx->copyup_list.find(m_object_no);
assert(it != m_ictx->copyup_list.end());
m_ictx->copyup_list.erase(it);
}
-bool CopyupRequest::send_object_map_head() {
+template <typename I>
+bool CopyupRequest<I>::send_object_map_head() {
CephContext *cct = m_ictx->cct;
ldout(cct, 20) << dendl;
}
bool may_update = false;
- uint8_t new_state, current_state;
+ uint8_t new_state;
+ uint8_t current_state = (*m_ictx->object_map)[m_object_no];
- vector<ObjectRequest<> *>::reverse_iterator r_it = m_pending_requests.rbegin();
- for (; r_it != m_pending_requests.rend(); ++r_it) {
- ObjectRequest<> *req = *r_it;
- if (!req->pre_object_map_update(&new_state)) {
- continue;
- }
+ auto r_it = m_pending_requests.rbegin();
+ if (r_it != m_pending_requests.rend()) {
+ auto req = *r_it;
+ new_state = req->get_pre_write_object_map_state();
- current_state = (*m_ictx->object_map)[m_object_no];
ldout(cct, 20) << req->get_op_type() << " object no "
<< m_object_no << " current state "
<< stringify(static_cast<uint32_t>(current_state))
<< " new state " << stringify(static_cast<uint32_t>(new_state))
<< dendl;
may_update = true;
- break;
}
if (may_update && (new_state != current_state) &&
return send_object_map();
}
-bool CopyupRequest::send_object_map() {
+template <typename I>
+bool CopyupRequest<I>::send_object_map() {
// avoid possible recursive lock attempts
if (m_snap_ids.empty()) {
// no object map update required
} // namespace io
} // namespace librbd
+
+template class librbd::io::CopyupRequest<librbd::ImageCtx>;
projects / ceph.git / blobdiff