593e971121
This patch removes the blocking Block::Session::sync RPC function and adds the asynchronous operations SYNC and TRIM to the block session's packet-stream interface. Even though the patch adjusts all block components to the interface change, the components keep the former blocking handling of sync internally for now because of the design of the 'Block::Driver' interface. This old interface is not worth changing. We should instead migrate the block servers step by step to the new 'Block::Request_stream' API. Fixes #3274
69 lines
1.2 KiB
C++
69 lines
1.2 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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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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};
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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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