--- /dev/null
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#include "journal/JournalRecorder.h"
+#include "common/errno.h"
+#include "journal/Entry.h"
+#include "journal/Utils.h"
+
+#include <atomic>
+
+#define dout_subsys ceph_subsys_journaler
+#undef dout_prefix
+#define dout_prefix *_dout << "JournalRecorder: " << this << " "
+
+using std::shared_ptr;
+
+namespace journal {
+
+namespace {
+
+struct C_Flush : public Context {
+ JournalMetadataPtr journal_metadata;
+ Context *on_finish;
+ std::atomic<int64_t> pending_flushes = { 0 };
+ int ret_val;
+
+ C_Flush(JournalMetadataPtr _journal_metadata, Context *_on_finish,
+ size_t _pending_flushes)
+ : journal_metadata(_journal_metadata), on_finish(_on_finish),
+ pending_flushes(_pending_flushes), ret_val(0) {
+ }
+
+ void complete(int r) override {
+ if (r < 0 && ret_val == 0) {
+ ret_val = r;
+ }
+ if (--pending_flushes == 0) {
+ // ensure all prior callback have been flushed as well
+ journal_metadata->queue(on_finish, ret_val);
+ delete this;
+ }
+ }
+ void finish(int r) override {
+ }
+};
+
+} // anonymous namespace
+
+JournalRecorder::JournalRecorder(librados::IoCtx &ioctx,
+ const std::string &object_oid_prefix,
+ const JournalMetadataPtr& journal_metadata,
+ uint32_t flush_interval, uint64_t flush_bytes,
+ double flush_age)
+ : m_cct(NULL), m_object_oid_prefix(object_oid_prefix),
+ m_journal_metadata(journal_metadata), m_flush_interval(flush_interval),
+ m_flush_bytes(flush_bytes), m_flush_age(flush_age), m_listener(this),
+ m_object_handler(this), m_lock("JournalerRecorder::m_lock"),
+ m_current_set(m_journal_metadata->get_active_set()) {
+
+ Mutex::Locker locker(m_lock);
+ m_ioctx.dup(ioctx);
+ m_cct = reinterpret_cast<CephContext*>(m_ioctx.cct());
+
+ uint8_t splay_width = m_journal_metadata->get_splay_width();
+ for (uint8_t splay_offset = 0; splay_offset < splay_width; ++splay_offset) {
+ m_object_locks.push_back(shared_ptr<Mutex>(
+ new Mutex("ObjectRecorder::m_lock::"+
+ std::to_string(splay_offset))));
+ uint64_t object_number = splay_offset + (m_current_set * splay_width);
+ m_object_ptrs[splay_offset] = create_object_recorder(
+ object_number,
+ m_object_locks[splay_offset]);
+ }
+
+ m_journal_metadata->add_listener(&m_listener);
+}
+
+JournalRecorder::~JournalRecorder() {
+ m_journal_metadata->remove_listener(&m_listener);
+
+ Mutex::Locker locker(m_lock);
+ assert(m_in_flight_advance_sets == 0);
+ assert(m_in_flight_object_closes == 0);
+}
+
+Future JournalRecorder::append(uint64_t tag_tid,
+ const bufferlist &payload_bl) {
+
+ m_lock.Lock();
+
+ uint64_t entry_tid = m_journal_metadata->allocate_entry_tid(tag_tid);
+ uint8_t splay_width = m_journal_metadata->get_splay_width();
+ uint8_t splay_offset = entry_tid % splay_width;
+
+ ObjectRecorderPtr object_ptr = get_object(splay_offset);
+ uint64_t commit_tid = m_journal_metadata->allocate_commit_tid(
+ object_ptr->get_object_number(), tag_tid, entry_tid);
+ FutureImplPtr future(new FutureImpl(tag_tid, entry_tid, commit_tid));
+ future->init(m_prev_future);
+ m_prev_future = future;
+
+ m_object_locks[splay_offset]->Lock();
+ m_lock.Unlock();
+
+ bufferlist entry_bl;
+ ::encode(Entry(future->get_tag_tid(), future->get_entry_tid(), payload_bl),
+ entry_bl);
+ assert(entry_bl.length() <= m_journal_metadata->get_object_size());
+
+ bool object_full = object_ptr->append_unlock({{future, entry_bl}});
+ if (object_full) {
+ ldout(m_cct, 10) << "object " << object_ptr->get_oid() << " now full"
+ << dendl;
+ Mutex::Locker l(m_lock);
+ close_and_advance_object_set(object_ptr->get_object_number() / splay_width);
+ }
+ return Future(future);
+}
+
+void JournalRecorder::flush(Context *on_safe) {
+ C_Flush *ctx;
+ {
+ Mutex::Locker locker(m_lock);
+
+ ctx = new C_Flush(m_journal_metadata, on_safe, m_object_ptrs.size() + 1);
+ for (ObjectRecorderPtrs::iterator it = m_object_ptrs.begin();
+ it != m_object_ptrs.end(); ++it) {
+ it->second->flush(ctx);
+ }
+
+ }
+
+ // avoid holding the lock in case there is nothing to flush
+ ctx->complete(0);
+}
+
+ObjectRecorderPtr JournalRecorder::get_object(uint8_t splay_offset) {
+ assert(m_lock.is_locked());
+
+ ObjectRecorderPtr object_recoder = m_object_ptrs[splay_offset];
+ assert(object_recoder != NULL);
+ return object_recoder;
+}
+
+void JournalRecorder::close_and_advance_object_set(uint64_t object_set) {
+ assert(m_lock.is_locked());
+
+ // entry overflow from open object
+ if (m_current_set != object_set) {
+ ldout(m_cct, 20) << __func__ << ": close already in-progress" << dendl;
+ return;
+ }
+
+ // we shouldn't overflow upon append if already closed and we
+ // shouldn't receive an overflowed callback if already closed
+ assert(m_in_flight_advance_sets == 0);
+ assert(m_in_flight_object_closes == 0);
+
+ uint64_t active_set = m_journal_metadata->get_active_set();
+ assert(m_current_set == active_set);
+ ++m_current_set;
+ ++m_in_flight_advance_sets;
+
+ ldout(m_cct, 20) << __func__ << ": closing active object set "
+ << object_set << dendl;
+ if (close_object_set(m_current_set)) {
+ advance_object_set();
+ }
+}
+
+void JournalRecorder::advance_object_set() {
+ assert(m_lock.is_locked());
+
+ assert(m_in_flight_object_closes == 0);
+ ldout(m_cct, 20) << __func__ << ": advance to object set " << m_current_set
+ << dendl;
+ m_journal_metadata->set_active_set(m_current_set, new C_AdvanceObjectSet(
+ this));
+}
+
+void JournalRecorder::handle_advance_object_set(int r) {
+ Mutex::Locker locker(m_lock);
+ ldout(m_cct, 20) << __func__ << ": r=" << r << dendl;
+
+ assert(m_in_flight_advance_sets > 0);
+ --m_in_flight_advance_sets;
+
+ if (r < 0 && r != -ESTALE) {
+ lderr(m_cct) << __func__ << ": failed to advance object set: "
+ << cpp_strerror(r) << dendl;
+ }
+
+ if (m_in_flight_advance_sets == 0 && m_in_flight_object_closes == 0) {
+ open_object_set();
+ }
+}
+
+void JournalRecorder::open_object_set() {
+ assert(m_lock.is_locked());
+
+ ldout(m_cct, 10) << __func__ << ": opening object set " << m_current_set
+ << dendl;
+
+ uint8_t splay_width = m_journal_metadata->get_splay_width();
+
+ lock_object_recorders();
+ for (ObjectRecorderPtrs::iterator it = m_object_ptrs.begin();
+ it != m_object_ptrs.end(); ++it) {
+ ObjectRecorderPtr object_recorder = it->second;
+ uint64_t object_number = object_recorder->get_object_number();
+ if (object_number / splay_width != m_current_set) {
+ assert(object_recorder->is_closed());
+
+ // ready to close object and open object in active set
+ create_next_object_recorder_unlock(object_recorder);
+ } else {
+ uint8_t splay_offset = object_number % splay_width;
+ m_object_locks[splay_offset]->Unlock();
+ }
+ }
+}
+
+bool JournalRecorder::close_object_set(uint64_t active_set) {
+ assert(m_lock.is_locked());
+
+ // object recorders will invoke overflow handler as they complete
+ // closing the object to ensure correct order of future appends
+ uint8_t splay_width = m_journal_metadata->get_splay_width();
+ lock_object_recorders();
+ for (ObjectRecorderPtrs::iterator it = m_object_ptrs.begin();
+ it != m_object_ptrs.end(); ++it) {
+ ObjectRecorderPtr object_recorder = it->second;
+ if (object_recorder->get_object_number() / splay_width != active_set) {
+ ldout(m_cct, 10) << __func__ << ": closing object "
+ << object_recorder->get_oid() << dendl;
+ // flush out all queued appends and hold future appends
+ if (!object_recorder->close()) {
+ ++m_in_flight_object_closes;
+ } else {
+ ldout(m_cct, 20) << __func__ << ": object "
+ << object_recorder->get_oid() << " closed" << dendl;
+ }
+ }
+ }
+ unlock_object_recorders();
+ return (m_in_flight_object_closes == 0);
+}
+
+ObjectRecorderPtr JournalRecorder::create_object_recorder(
+ uint64_t object_number, shared_ptr<Mutex> lock) {
+ ObjectRecorderPtr object_recorder(new ObjectRecorder(
+ m_ioctx, utils::get_object_name(m_object_oid_prefix, object_number),
+ object_number, lock, m_journal_metadata->get_work_queue(),
+ m_journal_metadata->get_timer(), m_journal_metadata->get_timer_lock(),
+ &m_object_handler, m_journal_metadata->get_order(), m_flush_interval,
+ m_flush_bytes, m_flush_age));
+ return object_recorder;
+}
+
+void JournalRecorder::create_next_object_recorder_unlock(
+ ObjectRecorderPtr object_recorder) {
+ assert(m_lock.is_locked());
+
+ uint64_t object_number = object_recorder->get_object_number();
+ uint8_t splay_width = m_journal_metadata->get_splay_width();
+ uint8_t splay_offset = object_number % splay_width;
+
+ assert(m_object_locks[splay_offset]->is_locked());
+
+ ObjectRecorderPtr new_object_recorder = create_object_recorder(
+ (m_current_set * splay_width) + splay_offset, m_object_locks[splay_offset]);
+
+ ldout(m_cct, 10) << __func__ << ": "
+ << "old oid=" << object_recorder->get_oid() << ", "
+ << "new oid=" << new_object_recorder->get_oid() << dendl;
+ AppendBuffers append_buffers;
+ object_recorder->claim_append_buffers(&append_buffers);
+
+ // update the commit record to point to the correct object number
+ for (auto &append_buffer : append_buffers) {
+ m_journal_metadata->overflow_commit_tid(
+ append_buffer.first->get_commit_tid(),
+ new_object_recorder->get_object_number());
+ }
+
+ new_object_recorder->append_unlock(std::move(append_buffers));
+ m_object_ptrs[splay_offset] = new_object_recorder;
+}
+
+void JournalRecorder::handle_update() {
+ Mutex::Locker locker(m_lock);
+
+ uint64_t active_set = m_journal_metadata->get_active_set();
+ if (m_current_set < active_set) {
+ // peer journal client advanced the active set
+ ldout(m_cct, 20) << __func__ << ": "
+ << "current_set=" << m_current_set << ", "
+ << "active_set=" << active_set << dendl;
+
+ uint64_t current_set = m_current_set;
+ m_current_set = active_set;
+ if (m_in_flight_advance_sets == 0 && m_in_flight_object_closes == 0) {
+ ldout(m_cct, 20) << __func__ << ": closing current object set "
+ << current_set << dendl;
+ if (close_object_set(active_set)) {
+ open_object_set();
+ }
+ }
+ }
+}
+
+void JournalRecorder::handle_closed(ObjectRecorder *object_recorder) {
+ ldout(m_cct, 10) << __func__ << ": " << object_recorder->get_oid() << dendl;
+
+ Mutex::Locker locker(m_lock);
+
+ uint64_t object_number = object_recorder->get_object_number();
+ uint8_t splay_width = m_journal_metadata->get_splay_width();
+ uint8_t splay_offset = object_number % splay_width;
+ ObjectRecorderPtr active_object_recorder = m_object_ptrs[splay_offset];
+ assert(active_object_recorder->get_object_number() == object_number);
+
+ assert(m_in_flight_object_closes > 0);
+ --m_in_flight_object_closes;
+
+ // object closed after advance active set committed
+ ldout(m_cct, 20) << __func__ << ": object "
+ << active_object_recorder->get_oid() << " closed" << dendl;
+ if (m_in_flight_object_closes == 0) {
+ if (m_in_flight_advance_sets == 0) {
+ // peer forced closing of object set
+ open_object_set();
+ } else {
+ // local overflow advanced object set
+ advance_object_set();
+ }
+ }
+}
+
+void JournalRecorder::handle_overflow(ObjectRecorder *object_recorder) {
+ ldout(m_cct, 10) << __func__ << ": " << object_recorder->get_oid() << dendl;
+
+ Mutex::Locker locker(m_lock);
+
+ uint64_t object_number = object_recorder->get_object_number();
+ uint8_t splay_width = m_journal_metadata->get_splay_width();
+ uint8_t splay_offset = object_number % splay_width;
+ ObjectRecorderPtr active_object_recorder = m_object_ptrs[splay_offset];
+ assert(active_object_recorder->get_object_number() == object_number);
+
+ ldout(m_cct, 20) << __func__ << ": object "
+ << active_object_recorder->get_oid() << " overflowed"
+ << dendl;
+ close_and_advance_object_set(object_number / splay_width);
+}
+
+} // namespace journal
Code Review / stor4nfv.git / blobdiff