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https://github.com/nestriness/cdc-file-transfer.git
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4326e972ac
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.
124 lines
3.1 KiB
C++
124 lines
3.1 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_FUSE_FS_MOCK_LIBFUSE_H_
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#define CDC_FUSE_FS_MOCK_LIBFUSE_H_
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#include <fcntl.h>
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#include <sys/stat.h>
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#include <cstdint>
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#include <vector>
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namespace cdc_ft {
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//
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// The interface below mimics the part of the FUSE low level interface we need.
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// See include/fuse_lowlevel.h for more information.
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//
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// Definitions.
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using fuse_ino_t = uint64_t;
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using fuse_req_t = void*;
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using nlink_t = uint64_t;
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constexpr fuse_ino_t FUSE_ROOT_ID = 1;
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#ifndef O_DIRECT
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constexpr uint32_t O_DIRECT = 040000;
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#endif
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struct fuse_entry_param {
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fuse_ino_t ino;
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struct stat attr;
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double attr_timeout;
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double entry_timeout;
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};
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struct fuse_file_info {
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int flags = O_RDONLY;
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unsigned int direct_io : 1;
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unsigned int keep_cache : 1;
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fuse_file_info() : direct_io(0), keep_cache(0) {}
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explicit fuse_file_info(int flags)
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: flags(flags), direct_io(0), keep_cache(0) {}
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};
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struct fuse_forget_data {
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uint64_t ino;
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uint64_t nlookup;
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};
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struct fuse_context {
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int uid;
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int gid;
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};
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struct statvfs {
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uint32_t f_bsize;
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uint32_t f_namemax;
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};
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// FUSE reply/action functions.
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size_t fuse_add_direntry(fuse_req_t req, char* buf, size_t bufsize,
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const char* name, const struct stat* stbuf, off_t off);
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int fuse_reply_attr(fuse_req_t req, const struct stat* attr,
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double attr_timeout);
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int fuse_reply_buf(fuse_req_t req, const char* buf, size_t size);
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int fuse_reply_entry(fuse_req_t req, const struct fuse_entry_param* e);
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int fuse_reply_err(fuse_req_t req, int err);
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int fuse_reply_open(fuse_req_t req, const struct fuse_file_info* fi);
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void fuse_reply_none(fuse_req_t req);
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int fuse_reply_statfs(fuse_req_t req, const struct statvfs* stbuf);
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struct fuse_context* fuse_get_context();
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// FUSE mocking class. Basically just a recorder for the fuse_* callbacks above.
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struct MockLibFuse {
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public:
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MockLibFuse();
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~MockLibFuse();
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struct Attr {
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struct stat value;
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double timeout;
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Attr(struct stat value, double timeout)
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: value(std::move(value)), timeout(timeout) {}
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};
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void SetUid(int uid);
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void SetGid(int gid);
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// Struct stored in the buffer |buf| by fuse_add_direntry().
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// Uses a maximum name size for simplicity.
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struct DirEntry {
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fuse_ino_t ino;
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uint32_t mode;
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char name[32];
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off_t off;
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};
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std::vector<fuse_entry_param> entries;
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std::vector<Attr> attrs;
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std::vector<int> errors;
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std::vector<fuse_file_info> open_files;
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std::vector<std::vector<char>> buffers;
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unsigned int none_counter = 0;
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fuse_context context;
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};
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} // namespace cdc_ft
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#endif // CDC_FUSE_FS_MOCK_LIBFUSE_H_
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