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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
#ifndef CEPH_JOURNAL_JOURNAL_TRIMMER_H
#define CEPH_JOURNAL_JOURNAL_TRIMMER_H
#include "include/int_types.h"
#include "include/rados/librados.hpp"
#include "include/Context.h"
#include "common/Mutex.h"
#include "journal/AsyncOpTracker.h"
#include "journal/JournalMetadata.h"
#include "cls/journal/cls_journal_types.h"
namespace journal {
class JournalTrimmer {
public:
typedef cls::journal::ObjectSetPosition ObjectSetPosition;
JournalTrimmer(librados::IoCtx &ioctx, const std::string &object_oid_prefix,
const JournalMetadataPtr &journal_metadata);
~JournalTrimmer();
int remove_objects();
void update_commit_position(const ObjectSetPosition &object_set_position);
private:
struct C_CommitPositionSafe : public Context {
JournalTrimmer *journal_trimmer;
ObjectSetPosition object_set_position;
C_CommitPositionSafe(JournalTrimmer *_journal_trimmer,
const ObjectSetPosition &_object_set_position)
: journal_trimmer(_journal_trimmer),
object_set_position(_object_set_position) {}
virtual void finish(int r) {
journal_trimmer->handle_commit_position_safe(r, object_set_position);
}
};
struct C_RemoveSet : public Context {
JournalTrimmer *journal_trimmer;
uint64_t object_set;
Mutex lock;
uint32_t refs;
int return_value;
C_RemoveSet(JournalTrimmer *_journal_trimmer, uint64_t _object_set,
uint8_t _splay_width);
virtual void complete(int r);
virtual void finish(int r) {
journal_trimmer->handle_set_removed(r, object_set);
}
};
librados::IoCtx m_ioctx;
CephContext *m_cct;
std::string m_object_oid_prefix;
JournalMetadataPtr m_journal_metadata;
AsyncOpTracker m_async_op_tracker;
Mutex m_lock;
bool m_remove_set_pending;
uint64_t m_remove_set;
Context *m_remove_set_ctx;
void trim_objects(uint64_t minimum_set);
void remove_set(uint64_t object_set);
void handle_commit_position_safe(int r, const ObjectSetPosition &position);
void handle_set_removed(int r, uint64_t object_set);
};
} // namespace journal
#endif // CEPH_JOURNAL_JOURNAL_TRIMMER_H
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