94 lines
3.4 KiB
C++
94 lines
3.4 KiB
C++
/* Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License, version 2.0,
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as published by the Free Software Foundation.
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This program is also distributed with certain software (including
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but not limited to OpenSSL) that is licensed under separate terms,
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as designated in a particular file or component or in included license
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documentation. The authors of MySQL hereby grant you an additional
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permission to link the program and your derivative works with the
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separately licensed software that they have included with MySQL.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License, version 2.0, for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
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#ifndef BUFFEREDFILEIO_INCLUDED
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#define BUFFEREDFILEIO_INCLUDED
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#include <mysql/plugin.h>
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#include <stddef.h>
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#include "my_inttypes.h"
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#include "my_io.h"
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#include "plugin/keyring/buffer.h"
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#include "plugin/keyring/checker/checker_factory.h"
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#include "plugin/keyring/common/i_keyring_io.h"
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#include "plugin/keyring/common/keyring.h"
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#include "plugin/keyring/common/keyring_memory.h"
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#include "plugin/keyring/common/logger.h"
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#include "plugin/keyring/digest.h"
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#include "plugin/keyring/file_io.h"
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#include "plugin/keyring/hash_to_buffer_serializer.h"
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namespace keyring {
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/**
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implementation of I/O Keyring interface on top of a (buffered) file
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*/
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class Buffered_file_io : public IKeyring_io {
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public:
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Buffered_file_io(ILogger *logger,
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std::vector<std::string> const *versions = nullptr);
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// ================= IKeyring_io implementation ================= //
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bool init(std::string *keyring_filename) override;
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bool flush_to_backup(ISerialized_object *serialized_object) override;
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bool flush_to_storage(ISerialized_object *serialized_object) override;
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ISerializer *get_serializer() override;
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bool get_serialized_object(ISerialized_object **serialized_object) override;
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bool has_next_serialized_object() override;
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protected:
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virtual bool remove_backup(myf my_flags);
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Buffer buffer;
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Digest digest;
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size_t memory_needed_for_buffer;
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private:
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bool recreate_keyring_from_backup_if_backup_exists();
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std::string *get_backup_filename();
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bool open_backup_file(File *backup_file);
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bool load_file_into_buffer(File file, Buffer *buffer);
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bool flush_buffer_to_storage(Buffer *buffer, File file);
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bool flush_buffer_to_file(Buffer *buffer, Digest *buffer_digest, File file);
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bool check_keyring_file_structure(File keyring_file);
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bool check_file_structure(File file, size_t file_size);
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bool check_if_keyring_file_can_be_opened_or_created();
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std::string keyring_filename;
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std::string backup_filename;
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const std::string file_version;
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ILogger *logger;
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Hash_to_buffer_serializer hash_to_buffer_serializer;
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std::vector<std::unique_ptr<Checker>> checkers;
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CheckerFactory checker_factory;
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File_io file_io;
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File keyring_file;
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Converter::Arch file_arch;
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const Converter::Arch native_arch;
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};
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} // namespace keyring
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#endif // BUFFEREDFILEIO_INCLUDED
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