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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
#pragma once
#include <memory>
#include "crimson/os/seastore/ordering_handle.h"
#include "crimson/os/seastore/seastore_types.h"
#include "crimson/os/seastore/segment_seq_allocator.h"
#include "crimson/os/seastore/cached_extent.h"
namespace crimson::os::seastore {
namespace random_block_device {
class RBMDevice;
}
class SegmentManagerGroup;
class SegmentProvider;
class JournalTrimmer;
class Journal {
public:
virtual JournalTrimmer &get_trimmer() = 0;
virtual writer_stats_t get_writer_stats() const = 0;
/**
* initializes journal for mkfs writes -- must run prior to calls
* to submit_record.
*/
using open_for_mkfs_ertr = crimson::errorator<
crimson::ct_error::input_output_error
>;
using open_for_mkfs_ret = open_for_mkfs_ertr::future<journal_seq_t>;
virtual open_for_mkfs_ret open_for_mkfs() = 0;
/**
* initializes journal for new writes -- must run prior to calls
* to submit_record. Should be called after replay if not a new
* Journal.
*/
using open_for_mount_ertr = open_for_mkfs_ertr;
using open_for_mount_ret = open_for_mkfs_ret;
virtual open_for_mount_ret open_for_mount() = 0;
/// close journal
using close_ertr = crimson::errorator<
crimson::ct_error::input_output_error>;
virtual close_ertr::future<> close() = 0;
/**
* submit_record
*
* write record with the ordering handle
*/
using submit_record_ertr = crimson::errorator<
crimson::ct_error::erange,
crimson::ct_error::input_output_error
>;
using submit_record_ret = submit_record_ertr::future<
record_locator_t
>;
virtual submit_record_ret submit_record(
record_t &&record,
OrderingHandle &handle
) = 0;
/**
* flush
*
* Wait for all outstanding IOs on handle to commit.
* Note, flush() machinery must go through the same pipeline
* stages and locks as submit_record.
*/
virtual seastar::future<> flush(OrderingHandle &handle) = 0;
/// sets write pipeline reference
virtual void set_write_pipeline(WritePipeline *_write_pipeline) = 0;
/**
* Read deltas and pass to delta_handler
*
* record_block_start (argument to delta_handler) is the start of the
* of the first block in the record
*/
using replay_ertr = crimson::errorator<
crimson::ct_error::input_output_error,
crimson::ct_error::invarg,
crimson::ct_error::enoent,
crimson::ct_error::erange>;
using replay_ret = replay_ertr::future<>;
using delta_handler_t = std::function<
replay_ertr::future<std::pair<bool, CachedExtentRef>>(
const record_locator_t&,
const delta_info_t&,
const journal_seq_t&, // dirty_tail
const journal_seq_t&, // alloc_tail
sea_time_point modify_time)>;
virtual replay_ret replay(
delta_handler_t &&delta_handler) = 0;
virtual seastar::future<> finish_commit(
transaction_type_t type) = 0;
virtual ~Journal() {}
virtual backend_type_t get_type() = 0;
virtual bool is_checksum_needed() = 0;
};
using JournalRef = std::unique_ptr<Journal>;
namespace journal {
JournalRef make_segmented(
SegmentProvider &provider,
JournalTrimmer &trimmer);
JournalRef make_circularbounded(
JournalTrimmer &trimmer,
crimson::os::seastore::random_block_device::RBMDevice* device,
std::string path);
}
}
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