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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 "IoOp.h"
#include "include/random.h"
/* Overview
*
* enum Sequence
* Enumeration of the different sequences
*
* class IoSequence
* Virtual class. IoSequences generate a stream of IoOPs.
* Sequences typically exhastively test permutations of
* offset and length to allow validation of code such as
* Erasure Coding. An IoSequence does not determine
* whether I/Os are issued sequentially or in parallel,
* it must generate barrier I/Os where operations must
* be serialized.
*
* class Seq*
* Implementations of IoSequence. Each class generates
* a different sequence of I/O.
*
* generate_sequence
* Create an IoSequence
*/
namespace ceph {
namespace io_exerciser {
enum class Sequence {
SEQUENCE_SEQ0,
SEQUENCE_SEQ1,
SEQUENCE_SEQ2,
SEQUENCE_SEQ3,
SEQUENCE_SEQ4,
SEQUENCE_SEQ5,
SEQUENCE_SEQ6,
SEQUENCE_SEQ7,
SEQUENCE_SEQ8,
SEQUENCE_SEQ9,
SEQUENCE_SEQ10,
SEQUENCE_END,
SEQUENCE_BEGIN = SEQUENCE_SEQ0
};
inline Sequence operator++(Sequence& s) {
return s = (Sequence)(((int)(s) + 1));
}
std::ostream& operator<<(std::ostream& os, const Sequence& seq);
/* I/O Sequences */
class IoSequence {
public:
virtual ~IoSequence() = default;
virtual Sequence get_id() const = 0;
virtual std::string get_name_with_seqseed() const;
virtual std::string get_name() const = 0;
int get_step() const;
int get_seed() const;
virtual Sequence getNextSupportedSequenceId() const;
virtual std::unique_ptr<IoOp> next();
virtual bool is_supported(Sequence sequence) const;
static std::unique_ptr<IoSequence> generate_sequence(
Sequence s, std::pair<int, int> obj_size_range, int seed);
protected:
uint64_t min_obj_size;
uint64_t max_obj_size;
bool create;
bool barrier;
bool done;
bool remove;
uint64_t obj_size;
int step;
int seed;
ceph::util::random_number_generator<int> rng =
ceph::util::random_number_generator<int>();
IoSequence(std::pair<int, int> obj_size_range, int seed);
virtual std::unique_ptr<IoOp> _next() = 0;
void set_min_object_size(uint64_t size);
void set_max_object_size(uint64_t size);
void select_random_object_size();
std::unique_ptr<IoOp> increment_object_size();
};
class Seq0 : public IoSequence {
public:
Seq0(std::pair<int, int> obj_size_range, int seed);
Sequence get_id() const override;
std::string get_name() const override;
std::unique_ptr<IoOp> _next() override;
private:
uint64_t offset;
uint64_t length;
};
class Seq1 : public IoSequence {
public:
Seq1(std::pair<int, int> obj_size_range, int seed);
Sequence get_id() const override;
std::string get_name() const override;
std::unique_ptr<IoOp> _next() override;
private:
int count;
};
class Seq2 : public IoSequence {
public:
Seq2(std::pair<int, int> obj_size_range, int seed);
Sequence get_id() const override;
std::string get_name() const override;
std::unique_ptr<IoOp> _next() override;
private:
uint64_t offset;
uint64_t length;
};
class Seq3 : public IoSequence {
public:
Seq3(std::pair<int, int> obj_size_range, int seed);
Sequence get_id() const override;
std::string get_name() const override;
std::unique_ptr<IoOp> _next() override;
private:
uint64_t offset1;
uint64_t offset2;
};
class Seq4 : public IoSequence {
public:
Seq4(std::pair<int, int> obj_size_range, int seed);
Sequence get_id() const override;
std::string get_name() const override;
std::unique_ptr<IoOp> _next() override;
private:
uint64_t offset1;
uint64_t offset2;
};
class Seq5 : public IoSequence {
public:
Seq5(std::pair<int, int> obj_size_range, int seed);
Sequence get_id() const override;
std::string get_name() const override;
std::unique_ptr<IoOp> _next() override;
private:
uint64_t offset;
uint64_t length;
bool doneread;
bool donebarrier;
};
class Seq6 : public IoSequence {
public:
Seq6(std::pair<int, int> obj_size_range, int seed);
Sequence get_id() const override;
std::string get_name() const override;
std::unique_ptr<IoOp> _next() override;
private:
uint64_t offset;
uint64_t length;
bool doneread;
bool donebarrier;
};
class Seq7 : public IoSequence {
public:
Seq7(std::pair<int, int> obj_size_range, int seed);
Sequence get_id() const override;
std::string get_name() const override;
std::unique_ptr<IoOp> _next() override;
private:
uint64_t offset;
bool doneread = true;
bool donebarrier = false;
};
class Seq8 : public IoSequence {
public:
Seq8(std::pair<int, int> obj_size_range, int seed);
Sequence get_id() const override;
std::string get_name() const override;
std::unique_ptr<IoOp> _next() override;
private:
uint64_t offset1;
uint64_t offset2;
bool doneread = true;
bool donebarrier = false;
};
class Seq9 : public IoSequence {
private:
uint64_t offset;
uint64_t length;
bool doneread = true;
bool donebarrier = false;
public:
Seq9(std::pair<int, int> obj_size_range, int seed);
Sequence get_id() const override;
std::string get_name() const override;
std::unique_ptr<IoOp> _next() override;
};
} // namespace io_exerciser
} // namespace ceph
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