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https://github.com/trapexit/mergerfs.git
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c9de0b512a
- Replace atomic shared pointer loads/stores with shared/unique locking. - Store the configured readdir mode directly as std::string. - Copy the active ReadDir implementation under lock before invoking it.
67 lines
1.9 KiB
C++
67 lines
1.9 KiB
C++
/*
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ISC License
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Copyright (c) 2026, Antonio SJ Musumeci <trapexit@spawn.link>
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Permission to use, copy, modify, and/or distribute this software for any
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purpose with or without fee is hereby granted, provided that the above
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copyright notice and this permission notice appear in all copies.
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THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#pragma once
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#include "fuse.h"
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#include "tofrom_string.hpp"
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#include "fuse_readdir_base.hpp"
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#include <memory>
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#include <mutex>
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#include <shared_mutex>
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namespace FUSE
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{
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int readdir(const fuse_req_ctx_t *ctx,
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fuse_file_info_t const *ffi,
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fuse_dirents_t *buf);
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}
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// The 'initialize' feature is ugly but required currently as when
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// using mount.mergerfs the process will fork so if readdir needs to
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// spawn threads it needs to do so after the fork. Longer term need to
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// do argument/config file validation in main() and actual resource
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// initialization in fuse_init().
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namespace FUSE
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{
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class ReadDir : public ToFromString
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{
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public:
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ReadDir(const std::string_view s_);
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public:
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std::string to_string() const;
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int from_string(const std::string_view);
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public:
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int operator()(const fuse_req_ctx_t *ctx,
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fuse_file_info_t const *ffi,
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fuse_dirents_t *buf);
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public:
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void initialize();
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private:
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bool _initialized = false;
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mutable std::shared_mutex _mutex;
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std::string _str;
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std::shared_ptr<FUSE::ReadDirBase> _impl;
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};
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}
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