+++ /dev/null
-// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
-// vim: ts=8 sw=2 smarttab
-
-#include "journal/ObjectRecorder.h"
-#include "journal/Future.h"
-#include "journal/Utils.h"
-#include "include/assert.h"
-#include "common/Timer.h"
-#include "cls/journal/cls_journal_client.h"
-
-#define dout_subsys ceph_subsys_journaler
-#undef dout_prefix
-#define dout_prefix *_dout << "ObjectRecorder: " << this << " "
-
-using namespace cls::journal;
-using std::shared_ptr;
-
-namespace journal {
-
-ObjectRecorder::ObjectRecorder(librados::IoCtx &ioctx, const std::string &oid,
- uint64_t object_number, shared_ptr<Mutex> lock,
- ContextWQ *work_queue, SafeTimer &timer,
- Mutex &timer_lock, Handler *handler,
- uint8_t order, uint32_t flush_interval,
- uint64_t flush_bytes, double flush_age)
- : RefCountedObject(NULL, 0), m_oid(oid), m_object_number(object_number),
- m_cct(NULL), m_op_work_queue(work_queue), m_timer(timer),
- m_timer_lock(timer_lock), m_handler(handler), m_order(order),
- m_soft_max_size(1 << m_order), m_flush_interval(flush_interval),
- m_flush_bytes(flush_bytes), m_flush_age(flush_age), m_flush_handler(this),
- m_lock(lock), m_append_tid(0), m_pending_bytes(0),
- m_size(0), m_overflowed(false), m_object_closed(false),
- m_in_flight_flushes(false), m_aio_scheduled(false) {
- m_ioctx.dup(ioctx);
- m_cct = reinterpret_cast<CephContext*>(m_ioctx.cct());
- assert(m_handler != NULL);
-}
-
-ObjectRecorder::~ObjectRecorder() {
- assert(m_append_task == NULL);
- assert(m_append_buffers.empty());
- assert(m_in_flight_tids.empty());
- assert(m_in_flight_appends.empty());
- assert(!m_aio_scheduled);
-}
-
-bool ObjectRecorder::append_unlock(AppendBuffers &&append_buffers) {
- assert(m_lock->is_locked());
-
- FutureImplPtr last_flushed_future;
- bool schedule_append = false;
-
- if (m_overflowed) {
- m_append_buffers.insert(m_append_buffers.end(),
- append_buffers.begin(), append_buffers.end());
- m_lock->Unlock();
- return false;
- }
-
- for (AppendBuffers::const_iterator iter = append_buffers.begin();
- iter != append_buffers.end(); ++iter) {
- if (append(*iter, &schedule_append)) {
- last_flushed_future = iter->first;
- }
- }
-
- if (last_flushed_future) {
- flush(last_flushed_future);
- m_lock->Unlock();
- } else {
- m_lock->Unlock();
- if (schedule_append) {
- schedule_append_task();
- } else {
- cancel_append_task();
- }
- }
- return (!m_object_closed && !m_overflowed &&
- m_size + m_pending_bytes >= m_soft_max_size);
-}
-
-void ObjectRecorder::flush(Context *on_safe) {
- ldout(m_cct, 20) << __func__ << ": " << m_oid << dendl;
-
- cancel_append_task();
- Future future;
- {
- Mutex::Locker locker(*m_lock);
-
- // if currently handling flush notifications, wait so that
- // we notify in the correct order (since lock is dropped on
- // callback)
- if (m_in_flight_flushes) {
- m_in_flight_flushes_cond.Wait(*(m_lock.get()));
- }
-
- // attach the flush to the most recent append
- if (!m_append_buffers.empty()) {
- future = Future(m_append_buffers.rbegin()->first);
-
- flush_appends(true);
- } else if (!m_in_flight_appends.empty()) {
- AppendBuffers &append_buffers = m_in_flight_appends.rbegin()->second;
- assert(!append_buffers.empty());
- future = Future(append_buffers.rbegin()->first);
- }
- }
-
- if (future.is_valid()) {
- future.flush(on_safe);
- } else {
- on_safe->complete(0);
- }
-}
-
-void ObjectRecorder::flush(const FutureImplPtr &future) {
- ldout(m_cct, 20) << __func__ << ": " << m_oid << " flushing " << *future
- << dendl;
-
- assert(m_lock->is_locked());
-
- if (future->get_flush_handler().get() != &m_flush_handler) {
- // if we don't own this future, re-issue the flush so that it hits the
- // correct journal object owner
- future->flush();
- return;
- } else if (future->is_flush_in_progress()) {
- return;
- }
-
- if (m_object_closed || m_overflowed) {
- return;
- }
-
- AppendBuffers::reverse_iterator r_it;
- for (r_it = m_append_buffers.rbegin(); r_it != m_append_buffers.rend();
- ++r_it) {
- if (r_it->first == future) {
- break;
- }
- }
- assert(r_it != m_append_buffers.rend());
-
- auto it = (++r_it).base();
- assert(it != m_append_buffers.end());
- ++it;
-
- AppendBuffers flush_buffers;
- flush_buffers.splice(flush_buffers.end(), m_append_buffers,
- m_append_buffers.begin(), it);
- send_appends(&flush_buffers);
-}
-
-void ObjectRecorder::claim_append_buffers(AppendBuffers *append_buffers) {
- ldout(m_cct, 20) << __func__ << ": " << m_oid << dendl;
-
- assert(m_lock->is_locked());
- assert(m_in_flight_tids.empty());
- assert(m_in_flight_appends.empty());
- assert(m_object_closed || m_overflowed);
- append_buffers->splice(append_buffers->end(), m_append_buffers,
- m_append_buffers.begin(), m_append_buffers.end());
-}
-
-bool ObjectRecorder::close() {
- assert (m_lock->is_locked());
-
- ldout(m_cct, 20) << __func__ << ": " << m_oid << dendl;
-
- cancel_append_task();
-
- flush_appends(true);
-
- assert(!m_object_closed);
- m_object_closed = true;
- return (m_in_flight_tids.empty() && !m_in_flight_flushes && !m_aio_scheduled);
-}
-
-void ObjectRecorder::handle_append_task() {
- assert(m_timer_lock.is_locked());
- m_append_task = NULL;
-
- Mutex::Locker locker(*m_lock);
- flush_appends(true);
-}
-
-void ObjectRecorder::cancel_append_task() {
- Mutex::Locker locker(m_timer_lock);
- if (m_append_task != NULL) {
- m_timer.cancel_event(m_append_task);
- m_append_task = NULL;
- }
-}
-
-void ObjectRecorder::schedule_append_task() {
- Mutex::Locker locker(m_timer_lock);
- if (m_append_task == nullptr && m_flush_age > 0) {
- m_append_task = m_timer.add_event_after(
- m_flush_age, new FunctionContext([this](int) {
- handle_append_task();
- }));
- }
-}
-
-bool ObjectRecorder::append(const AppendBuffer &append_buffer,
- bool *schedule_append) {
- assert(m_lock->is_locked());
-
- bool flush_requested = false;
- if (!m_object_closed && !m_overflowed) {
- flush_requested = append_buffer.first->attach(&m_flush_handler);
- }
-
- m_append_buffers.push_back(append_buffer);
- m_pending_bytes += append_buffer.second.length();
-
- if (!flush_appends(false)) {
- *schedule_append = true;
- }
- return flush_requested;
-}
-
-bool ObjectRecorder::flush_appends(bool force) {
- assert(m_lock->is_locked());
- if (m_object_closed || m_overflowed) {
- return true;
- }
-
- if (m_append_buffers.empty() ||
- (!force &&
- m_size + m_pending_bytes < m_soft_max_size &&
- (m_flush_interval > 0 && m_append_buffers.size() < m_flush_interval) &&
- (m_flush_bytes > 0 && m_pending_bytes < m_flush_bytes))) {
- return false;
- }
-
- m_pending_bytes = 0;
- AppendBuffers append_buffers;
- append_buffers.swap(m_append_buffers);
- send_appends(&append_buffers);
- return true;
-}
-
-void ObjectRecorder::handle_append_flushed(uint64_t tid, int r) {
- ldout(m_cct, 10) << __func__ << ": " << m_oid << " tid=" << tid
- << ", r=" << r << dendl;
-
- AppendBuffers append_buffers;
- {
- m_lock->Lock();
- auto tid_iter = m_in_flight_tids.find(tid);
- assert(tid_iter != m_in_flight_tids.end());
- m_in_flight_tids.erase(tid_iter);
-
- InFlightAppends::iterator iter = m_in_flight_appends.find(tid);
- if (r == -EOVERFLOW || m_overflowed) {
- if (iter != m_in_flight_appends.end()) {
- m_overflowed = true;
- } else {
- // must have seen an overflow on a previous append op
- assert(r == -EOVERFLOW && m_overflowed);
- }
-
- // notify of overflow once all in-flight ops are complete
- if (m_in_flight_tids.empty() && !m_aio_scheduled) {
- append_overflowed();
- notify_handler_unlock();
- } else {
- m_lock->Unlock();
- }
- return;
- }
-
- assert(iter != m_in_flight_appends.end());
- append_buffers.swap(iter->second);
- assert(!append_buffers.empty());
-
- m_in_flight_appends.erase(iter);
- m_in_flight_flushes = true;
- m_lock->Unlock();
- }
-
- // Flag the associated futures as complete.
- for (AppendBuffers::iterator buf_it = append_buffers.begin();
- buf_it != append_buffers.end(); ++buf_it) {
- ldout(m_cct, 20) << __func__ << ": " << *buf_it->first << " marked safe"
- << dendl;
- buf_it->first->safe(r);
- }
-
- // wake up any flush requests that raced with a RADOS callback
- m_lock->Lock();
- m_in_flight_flushes = false;
- m_in_flight_flushes_cond.Signal();
-
- if (m_in_flight_appends.empty() && !m_aio_scheduled && m_object_closed) {
- // all remaining unsent appends should be redirected to new object
- notify_handler_unlock();
- } else {
- m_lock->Unlock();
- }
-}
-
-void ObjectRecorder::append_overflowed() {
- ldout(m_cct, 10) << __func__ << ": " << m_oid << " append overflowed"
- << dendl;
-
- assert(m_lock->is_locked());
- assert(!m_in_flight_appends.empty());
-
- cancel_append_task();
-
- InFlightAppends in_flight_appends;
- in_flight_appends.swap(m_in_flight_appends);
-
- AppendBuffers restart_append_buffers;
- for (InFlightAppends::iterator it = in_flight_appends.begin();
- it != in_flight_appends.end(); ++it) {
- restart_append_buffers.insert(restart_append_buffers.end(),
- it->second.begin(), it->second.end());
- }
-
- restart_append_buffers.splice(restart_append_buffers.end(),
- m_append_buffers,
- m_append_buffers.begin(),
- m_append_buffers.end());
- restart_append_buffers.swap(m_append_buffers);
-
- for (AppendBuffers::const_iterator it = m_append_buffers.begin();
- it != m_append_buffers.end(); ++it) {
- ldout(m_cct, 20) << __func__ << ": overflowed " << *it->first
- << dendl;
- it->first->detach();
- }
-}
-
-void ObjectRecorder::send_appends(AppendBuffers *append_buffers) {
- assert(m_lock->is_locked());
- assert(!append_buffers->empty());
-
- for (AppendBuffers::iterator it = append_buffers->begin();
- it != append_buffers->end(); ++it) {
- ldout(m_cct, 20) << __func__ << ": flushing " << *it->first
- << dendl;
- it->first->set_flush_in_progress();
- m_size += it->second.length();
- }
-
- m_pending_buffers.splice(m_pending_buffers.end(), *append_buffers,
- append_buffers->begin(), append_buffers->end());
- if (!m_aio_scheduled) {
- m_op_work_queue->queue(new FunctionContext([this] (int r) {
- send_appends_aio();
- }));
- m_aio_scheduled = true;
- }
-}
-
-void ObjectRecorder::send_appends_aio() {
- AppendBuffers *append_buffers;
- uint64_t append_tid;
- {
- Mutex::Locker locker(*m_lock);
- append_tid = m_append_tid++;
- m_in_flight_tids.insert(append_tid);
-
- // safe to hold pointer outside lock until op is submitted
- append_buffers = &m_in_flight_appends[append_tid];
- append_buffers->swap(m_pending_buffers);
- }
-
- ldout(m_cct, 10) << __func__ << ": " << m_oid << " flushing journal tid="
- << append_tid << dendl;
- C_AppendFlush *append_flush = new C_AppendFlush(this, append_tid);
- C_Gather *gather_ctx = new C_Gather(m_cct, append_flush);
-
- librados::ObjectWriteOperation op;
- client::guard_append(&op, m_soft_max_size);
- for (AppendBuffers::iterator it = append_buffers->begin();
- it != append_buffers->end(); ++it) {
- ldout(m_cct, 20) << __func__ << ": flushing " << *it->first
- << dendl;
- op.append(it->second);
- op.set_op_flags2(CEPH_OSD_OP_FLAG_FADVISE_DONTNEED);
- }
-
- librados::AioCompletion *rados_completion =
- librados::Rados::aio_create_completion(gather_ctx->new_sub(), nullptr,
- utils::rados_ctx_callback);
- int r = m_ioctx.aio_operate(m_oid, rados_completion, &op);
- assert(r == 0);
- rados_completion->release();
-
- {
- m_lock->Lock();
- if (m_pending_buffers.empty()) {
- m_aio_scheduled = false;
- if (m_in_flight_appends.empty() && m_object_closed) {
- // all remaining unsent appends should be redirected to new object
- notify_handler_unlock();
- } else {
- m_lock->Unlock();
- }
- } else {
- // additional pending items -- reschedule
- m_op_work_queue->queue(new FunctionContext([this] (int r) {
- send_appends_aio();
- }));
- m_lock->Unlock();
- }
- }
-
- // allow append op to complete
- gather_ctx->activate();
-}
-
-void ObjectRecorder::notify_handler_unlock() {
- assert(m_lock->is_locked());
- if (m_object_closed) {
- m_lock->Unlock();
- m_handler->closed(this);
- } else {
- // TODO need to delay completion until after aio_notify completes
- m_lock->Unlock();
- m_handler->overflow(this);
- }
-}
-
-} // namespace journal
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