+++ /dev/null
-// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
-// vim: ts=8 sw=2 smarttab
-
-#ifndef CEPH_LIBRBD_JOURNAL_REPLAY_H
-#define CEPH_LIBRBD_JOURNAL_REPLAY_H
-
-#include "include/int_types.h"
-#include "include/buffer_fwd.h"
-#include "include/Context.h"
-#include "common/Mutex.h"
-#include "librbd/io/Types.h"
-#include "librbd/journal/Types.h"
-#include <boost/variant.hpp>
-#include <list>
-#include <unordered_set>
-#include <unordered_map>
-
-namespace librbd {
-
-class ImageCtx;
-namespace io { struct AioCompletion; }
-
-namespace journal {
-
-template <typename ImageCtxT = ImageCtx>
-class Replay {
-public:
- static Replay *create(ImageCtxT &image_ctx) {
- return new Replay(image_ctx);
- }
-
- Replay(ImageCtxT &image_ctx);
- ~Replay();
-
- int decode(bufferlist::iterator *it, EventEntry *event_entry);
- void process(const EventEntry &event_entry,
- Context *on_ready, Context *on_safe);
-
- void shut_down(bool cancel_ops, Context *on_finish);
- void flush(Context *on_finish);
-
- void replay_op_ready(uint64_t op_tid, Context *on_resume);
-
-private:
- typedef std::unordered_set<int> ReturnValues;
-
- struct OpEvent {
- bool op_in_progress = false;
- bool finish_on_ready = false;
- Context *on_op_finish_event = nullptr;
- Context *on_start_ready = nullptr;
- Context *on_start_safe = nullptr;
- Context *on_finish_ready = nullptr;
- Context *on_finish_safe = nullptr;
- Context *on_op_complete = nullptr;
- ReturnValues op_finish_error_codes;
- ReturnValues ignore_error_codes;
- };
-
- typedef std::list<uint64_t> OpTids;
- typedef std::list<Context *> Contexts;
- typedef std::unordered_set<Context *> ContextSet;
- typedef std::unordered_map<uint64_t, OpEvent> OpEvents;
-
- struct C_OpOnComplete : public Context {
- Replay *replay;
- uint64_t op_tid;
- C_OpOnComplete(Replay *replay, uint64_t op_tid)
- : replay(replay), op_tid(op_tid) {
- }
- void finish(int r) override {
- replay->handle_op_complete(op_tid, r);
- }
- };
-
- struct C_AioModifyComplete : public Context {
- Replay *replay;
- Context *on_ready;
- Context *on_safe;
- std::set<int> filters;
- C_AioModifyComplete(Replay *replay, Context *on_ready,
- Context *on_safe, std::set<int> &&filters)
- : replay(replay), on_ready(on_ready), on_safe(on_safe),
- filters(std::move(filters)) {
- }
- void finish(int r) override {
- replay->handle_aio_modify_complete(on_ready, on_safe, r, filters);
- }
- };
-
- struct C_AioFlushComplete : public Context {
- Replay *replay;
- Context *on_flush_safe;
- Contexts on_safe_ctxs;
- C_AioFlushComplete(Replay *replay, Context *on_flush_safe,
- Contexts &&on_safe_ctxs)
- : replay(replay), on_flush_safe(on_flush_safe),
- on_safe_ctxs(on_safe_ctxs) {
- }
- void finish(int r) override {
- replay->handle_aio_flush_complete(on_flush_safe, on_safe_ctxs, r);
- }
- };
-
- struct EventVisitor : public boost::static_visitor<void> {
- Replay *replay;
- Context *on_ready;
- Context *on_safe;
-
- EventVisitor(Replay *_replay, Context *_on_ready, Context *_on_safe)
- : replay(_replay), on_ready(_on_ready), on_safe(_on_safe) {
- }
-
- template <typename Event>
- inline void operator()(const Event &event) const {
- replay->handle_event(event, on_ready, on_safe);
- }
- };
-
- ImageCtxT &m_image_ctx;
-
- Mutex m_lock;
-
- uint64_t m_in_flight_aio_flush = 0;
- uint64_t m_in_flight_aio_modify = 0;
- Contexts m_aio_modify_unsafe_contexts;
- ContextSet m_aio_modify_safe_contexts;
-
- OpEvents m_op_events;
- uint64_t m_in_flight_op_events = 0;
-
- bool m_shut_down = false;
- Context *m_flush_ctx = nullptr;
- Context *m_on_aio_ready = nullptr;
-
- void handle_event(const AioDiscardEvent &event, Context *on_ready,
- Context *on_safe);
- void handle_event(const AioWriteEvent &event, Context *on_ready,
- Context *on_safe);
- void handle_event(const AioWriteSameEvent &event, Context *on_ready,
- Context *on_safe);
- void handle_event(const AioCompareAndWriteEvent &event, Context *on_ready,
- Context *on_safe);
- void handle_event(const AioFlushEvent &event, Context *on_ready,
- Context *on_safe);
- void handle_event(const OpFinishEvent &event, Context *on_ready,
- Context *on_safe);
- void handle_event(const SnapCreateEvent &event, Context *on_ready,
- Context *on_safe);
- void handle_event(const SnapRemoveEvent &event, Context *on_ready,
- Context *on_safe);
- void handle_event(const SnapRenameEvent &event, Context *on_ready,
- Context *on_safe);
- void handle_event(const SnapProtectEvent &event, Context *on_ready,
- Context *on_safe);
- void handle_event(const SnapUnprotectEvent &event, Context *on_ready,
- Context *on_safe);
- void handle_event(const SnapRollbackEvent &event, Context *on_ready,
- Context *on_safe);
- void handle_event(const RenameEvent &event, Context *on_ready,
- Context *on_safe);
- void handle_event(const ResizeEvent &event, Context *on_ready,
- Context *on_safe);
- void handle_event(const FlattenEvent &event, Context *on_ready,
- Context *on_safe);
- void handle_event(const DemotePromoteEvent &event, Context *on_ready,
- Context *on_safe);
- void handle_event(const SnapLimitEvent &event, Context *on_ready,
- Context *on_safe);
- void handle_event(const UpdateFeaturesEvent &event, Context *on_ready,
- Context *on_safe);
- void handle_event(const MetadataSetEvent &event, Context *on_ready,
- Context *on_safe);
- void handle_event(const MetadataRemoveEvent &event, Context *on_ready,
- Context *on_safe);
- void handle_event(const UnknownEvent &event, Context *on_ready,
- Context *on_safe);
-
- void handle_aio_modify_complete(Context *on_ready, Context *on_safe,
- int r, std::set<int> &filters);
- void handle_aio_flush_complete(Context *on_flush_safe, Contexts &on_safe_ctxs,
- int r);
-
- Context *create_op_context_callback(uint64_t op_tid, Context *on_ready,
- Context *on_safe, OpEvent **op_event);
- void handle_op_complete(uint64_t op_tid, int r);
-
- io::AioCompletion *create_aio_modify_completion(Context *on_ready,
- Context *on_safe,
- io::aio_type_t aio_type,
- bool *flush_required,
- std::set<int> &&filters);
- io::AioCompletion *create_aio_flush_completion(Context *on_safe);
- void handle_aio_completion(io::AioCompletion *aio_comp);
-
-};
-
-} // namespace journal
-} // namespace librbd
-
-extern template class librbd::journal::Replay<librbd::ImageCtx>;
-
-#endif // CEPH_LIBRBD_JOURNAL_REPLAY_H
Code Review / stor4nfv.git / blobdiff