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https://github.com/nestriness/cdc-file-transfer.git
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The tools allow efficient and fast synchronization of large directory trees from a Windows workstation to a Linux target machine. cdc_rsync* support efficient copy of files by using content-defined chunking (CDC) to identify chunks within files that can be reused. asset_stream_manager + cdc_fuse_fs support efficient streaming of a local directory to a remote virtual file system based on FUSE. It also employs CDC to identify and reuse unchanged data chunks.
76 lines
2.7 KiB
C++
76 lines
2.7 KiB
C++
/*
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* Copyright 2022 Google LLC
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef CDC_RSYNC_SERVER_FILE_DIFF_GENERATOR_H_
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#define CDC_RSYNC_SERVER_FILE_DIFF_GENERATOR_H_
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#include <vector>
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#include "cdc_rsync/protos/messages.pb.h"
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#include "cdc_rsync_server/file_info.h"
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namespace cdc_ft {
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namespace file_diff {
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struct Result {
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// Files present on the client, but not on the server.
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std::vector<FileInfo> missing_files;
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// Files present on the server, but not on the client.
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std::vector<FileInfo> extraneous_files;
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// Files present on both, with different timestamp or file size.
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std::vector<ChangedFileInfo> changed_files;
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// Files present on both, with matching timestamp and file size.
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std::vector<FileInfo> matching_files;
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// Directories present on the client, but not on the server.
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std::vector<DirInfo> missing_dirs;
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// Directories present on the server, but not on the client.
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std::vector<DirInfo> extraneous_dirs;
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// Directories present on both client and server.
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std::vector<DirInfo> matching_dirs;
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};
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// Generates the diff between
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// 1) |client_files| and |server_files| by comparing
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// file paths, modified times and file sizes.
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// If |double_check_missing| is true, missing files are checked for existence
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// (relative to |base_dir| and |copy_dest|, if non-empty)
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// before they are put into the missing bucket.
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// 2) |client_dirs| and |server_dirs| by comparing directory paths.
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// The passed-in vectors are consumed.
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Result Generate(std::vector<FileInfo>&& client_files,
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std::vector<FileInfo>&& server_files,
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std::vector<DirInfo>&& client_dirs,
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std::vector<DirInfo>&& server_dirs, const std::string& base_dir,
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const std::string& copy_dest, bool double_check_missing);
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// Adjusts file containers according to sync flags.
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// |existing|, |checksum|, |whole_file| are the sync flags, see command line
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// help. They cause files to be moved between containers.
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// |diff| is the result from Generate().
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SendFileStatsResponse AdjustToFlagsAndGetStats(bool existing, bool checksum,
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bool whole_file, Result* diff);
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} // namespace file_diff
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} // namespace cdc_ft
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#endif // CDC_RSYNC_SERVER_FILE_DIFF_GENERATOR_H_
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