115 lines
4.9 KiB
C++
115 lines
4.9 KiB
C++
/*
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* s3fs - FUSE-based file system backed by Amazon S3
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*
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* Copyright(C) 2007 Randy Rizun <rrizun@gmail.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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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 for more details.
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*
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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 Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#ifndef S3FS_FDCACHE_H_
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#define S3FS_FDCACHE_H_
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#include "fdcache_entity.h"
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//------------------------------------------------
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// class FdManager
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//------------------------------------------------
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class FdManager
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{
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private:
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static FdManager singleton;
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static pthread_mutex_t fd_manager_lock;
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static pthread_mutex_t cache_cleanup_lock;
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static pthread_mutex_t reserved_diskspace_lock;
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static bool is_lock_init;
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static std::string cache_dir;
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static bool check_cache_dir_exist;
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static off_t free_disk_space; // limit free disk space
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static off_t fake_used_disk_space; // difference between fake free disk space and actual at startup(for test/debug)
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static std::string check_cache_output;
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static bool checked_lseek;
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static bool have_lseek_hole;
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static std::string tmp_dir;
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fdent_map_t fent;
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private:
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static off_t GetFreeDiskSpace(const char* path);
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static off_t GetTotalDiskSpace(const char* path);
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static bool IsDir(const std::string* dir);
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static int GetVfsStat(const char* path, struct statvfs* vfsbuf);
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int GetPseudoFdCount(const char* path);
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void CleanupCacheDirInternal(const std::string &path = "");
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bool RawCheckAllCache(FILE* fp, const char* cache_stat_top_dir, const char* sub_path, int& total_file_cnt, int& err_file_cnt, int& err_dir_cnt);
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public:
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FdManager();
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~FdManager();
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// Reference singleton
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static FdManager* get() { return &singleton; }
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static bool DeleteCacheDirectory();
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static int DeleteCacheFile(const char* path);
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static bool SetCacheDir(const char* dir);
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static bool IsCacheDir() { return !FdManager::cache_dir.empty(); }
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static const char* GetCacheDir() { return FdManager::cache_dir.c_str(); }
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static bool SetCacheCheckOutput(const char* path);
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static const char* GetCacheCheckOutput() { return FdManager::check_cache_output.c_str(); }
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static bool MakeCachePath(const char* path, std::string& cache_path, bool is_create_dir = true, bool is_mirror_path = false);
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static bool CheckCacheTopDir();
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static bool MakeRandomTempPath(const char* path, std::string& tmppath);
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static bool SetCheckCacheDirExist(bool is_check);
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static bool CheckCacheDirExist();
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static bool HasOpenEntityFd(const char* path);
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static int GetOpenFdCount(const char* path);
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static off_t GetEnsureFreeDiskSpace();
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static off_t SetEnsureFreeDiskSpace(off_t size);
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static bool InitFakeUsedDiskSize(off_t fake_freesize);
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static bool IsSafeDiskSpace(const char* path, off_t size);
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static bool IsSafeDiskSpaceWithLog(const char* path, off_t size);
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static void FreeReservedDiskSpace(off_t size);
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static bool ReserveDiskSpace(off_t size);
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static bool HaveLseekHole();
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static bool SetTmpDir(const char* dir);
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static bool CheckTmpDirExist();
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static FILE* MakeTempFile();
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static off_t GetTotalDiskSpaceByRatio(int ratio);
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// Return FdEntity associated with path, returning nullptr on error. This operation increments the reference count; callers must decrement via Close after use.
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FdEntity* GetFdEntity(const char* path, int& existfd, bool newfd = true, AutoLock::Type locktype = AutoLock::NONE);
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FdEntity* Open(int& fd, const char* path, const headers_t* pmeta, off_t size, const struct timespec& ts_mctime, int flags, bool force_tmpfile, bool is_create, bool ignore_modify, AutoLock::Type type);
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FdEntity* GetExistFdEntity(const char* path, int existfd = -1);
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FdEntity* OpenExistFdEntity(const char* path, int& fd, int flags = O_RDONLY);
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void Rename(const std::string &from, const std::string &to);
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bool Close(FdEntity* ent, int fd);
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bool ChangeEntityToTempPath(FdEntity* ent, const char* path);
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void CleanupCacheDir();
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bool CheckAllCache();
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};
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#endif // S3FS_FDCACHE_H_
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/*
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* Local variables:
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* tab-width: 4
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* c-basic-offset: 4
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* End:
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* vim600: expandtab sw=4 ts=4 fdm=marker
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* vim<600: expandtab sw=4 ts=4
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*/
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