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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 <boost/intrusive_ptr.hpp>
#include <boost/smart_ptr/intrusive_ref_counter.hpp>
#include <seastar/core/future.hh>
#include "crimson/os/seastore/segment_manager.h"
#include "crimson/os/seastore/segment_manager/ephemeral.h"
namespace crimson::os::seastore::segment_manager {
class EphemeralSegmentManager;
using EphemeralSegmentManagerRef = std::unique_ptr<EphemeralSegmentManager>;
struct ephemeral_config_t {
size_t size = 0;
size_t block_size = 0;
size_t segment_size = 0;
};
constexpr ephemeral_config_t DEFAULT_TEST_EPHEMERAL = {
1 << 30,
4 << 10,
8 << 20
};
std::ostream &operator<<(std::ostream &, const ephemeral_config_t &);
EphemeralSegmentManagerRef create_test_ephemeral();
class EphemeralSegment final : public Segment {
friend class EphemeralSegmentManager;
EphemeralSegmentManager &manager;
const segment_id_t id;
segment_off_t write_pointer = 0;
public:
EphemeralSegment(EphemeralSegmentManager &manager, segment_id_t id);
segment_id_t get_segment_id() const final { return id; }
segment_off_t get_write_capacity() const final;
segment_off_t get_write_ptr() const final { return write_pointer; }
close_ertr::future<> close() final;
write_ertr::future<> write(segment_off_t offset, ceph::bufferlist bl) final;
~EphemeralSegment() {}
};
class EphemeralSegmentManager final : public SegmentManager {
friend class EphemeralSegment;
using segment_state_t = Segment::segment_state_t;
const ephemeral_config_t config;
std::optional<seastore_meta_t> meta;
size_t get_offset(paddr_t addr) {
return (addr.segment * config.segment_size) + addr.offset;
}
std::vector<segment_state_t> segment_state;
char *buffer = nullptr;
Segment::close_ertr::future<> segment_close(segment_id_t id);
public:
EphemeralSegmentManager(ephemeral_config_t config) : config(config) {}
~EphemeralSegmentManager();
using init_ertr = crimson::errorator<
crimson::ct_error::enospc,
crimson::ct_error::invarg,
crimson::ct_error::erange>;
init_ertr::future<> init();
open_ertr::future<SegmentRef> open(segment_id_t id) final;
release_ertr::future<> release(segment_id_t id) final;
read_ertr::future<> read(
paddr_t addr,
size_t len,
ceph::bufferptr &out) final;
size_t get_size() const final {
return config.size;
}
segment_off_t get_block_size() const final {
return config.block_size;
}
segment_off_t get_segment_size() const final {
return config.segment_size;
}
const seastore_meta_t &get_meta() const final {
assert(meta);
return *meta;
}
void remount();
// public so tests can bypass segment interface when simpler
Segment::write_ertr::future<> segment_write(
paddr_t addr,
ceph::bufferlist bl,
bool ignore_check=false);
};
}
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