92 lines
1.7 KiB
C++
92 lines
1.7 KiB
C++
/*
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* \brief Block request
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* \author Norman Feske
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* \date 2018-12-17
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*/
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/*
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* Copyright (C) 2018 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU Affero General Public License version 3.
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*/
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#ifndef _INCLUDE__BLOCK__REQUEST_H_
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#define _INCLUDE__BLOCK__REQUEST_H_
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/* Genode includes */
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#include <base/stdint.h>
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#include <base/output.h>
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namespace Block {
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typedef Genode::uint64_t block_number_t;
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typedef Genode::size_t block_count_t;
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typedef Genode::off_t off_t;
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struct Operation;
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struct Request;
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}
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struct Block::Operation
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{
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enum class Type { INVALID = 0, READ = 1, WRITE = 2, SYNC = 3, TRIM = 4 };
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Type type;
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block_number_t block_number;
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block_count_t count;
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bool valid() const
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{
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return type == Type::READ || type == Type::WRITE
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|| type == Type::SYNC || type == Type::TRIM;
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}
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static bool has_payload(Type type)
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{
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return type == Type::READ || type == Type::WRITE;
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}
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static char const *type_name(Type type)
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{
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switch (type) {
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case Type::INVALID: return "INVALID";
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case Type::READ: return "READ";
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case Type::WRITE: return "WRITE";
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case Type::SYNC: return "SYNC";
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case Type::TRIM: return "TRIM";
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}
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return "INVALID";
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}
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void print(Genode::Output &out) const
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{
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Genode::print(out, type_name(type), " block=", block_number, " count=", count);
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}
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};
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struct Block::Request
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{
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struct Tag { unsigned long value; };
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Operation operation;
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bool success;
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/**
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* Location of payload within the packet stream
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*/
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off_t offset;
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/**
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* Client-defined identifier to associate acknowledgements with requests
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*
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* The underlying type corresponds to 'Id_space::Id'.
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*/
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Tag tag;
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};
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#endif /* _INCLUDE__BLOCK__REQUEST_H_ */
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