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/** |
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* This file is part of the CernVM File System. |
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* |
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* This is the internal implementation of libcvmfs, not to be exposed to the |
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* code using the library. |
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* |
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* Defines LibGlobals and LibContext classes that wrap around a FileSystem |
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* and a MountPoint. The libcvmfs.cc implementation of the libcvmfs interface |
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* uses LibGlobals for library initialization and deinitialization. It uses |
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* LibContext objects for all the file system heavy lifting. |
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*/ |
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#ifndef CVMFS_LIBCVMFS_INT_H_ |
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#define CVMFS_LIBCVMFS_INT_H_ |
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#include <syslog.h> |
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#include <time.h> |
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#include <unistd.h> |
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#include <string> |
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#include "interrupt.h" |
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#include "loader.h" |
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#include "mountpoint.h" |
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#include "options.h" |
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class CacheManager; |
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namespace catalog { |
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class ClientCatalogManager; |
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} |
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namespace signature { |
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class SignatureManager; |
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} |
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namespace download { |
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class DownloadManager; |
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} |
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namespace perf { |
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class Statistics; |
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} |
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namespace cvmfs { |
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extern pid_t pid_; |
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extern std::string *repository_name_; |
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extern bool foreground_; |
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class Fetcher; |
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} // namespace cvmfs |
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struct cvmfs_stat_t; |
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/** |
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* A singleton managing the cvmfs resources for all attached repositories. A |
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* thin wrapper around the FileSystem object that does most of the heavy work. |
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*/ |
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class LibGlobals : SingleCopy { |
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public: |
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static loader::Failures Initialize(OptionsManager *options_mgr); |
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static void CleanupInstance(); |
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static LibGlobals *GetInstance(); |
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FileSystem *file_system() { return file_system_; } |
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void set_options_mgr(OptionsManager *value) { options_mgr_ = value; } |
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private: |
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LibGlobals(); |
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~LibGlobals(); |
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static LibGlobals *instance_; |
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/** |
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* Only non-NULL if cvmfs_init is used for initialization. In this case, the |
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* options manager needs to be cleaned up by cvmfs_fini. |
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*/ |
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OptionsManager *options_mgr_; |
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FileSystem *file_system_; |
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}; |
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/** |
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* Encapsulates a single attached repository. It uses a MountPoint object for |
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* creating the state of all the necessary manager objects. On top of the |
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* managers it implements file system operations (read, list, ...). |
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*/ |
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class LibContext : SingleCopy { |
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public: |
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static LibContext *Create(const std::string &fqrn, |
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OptionsManager *options_mgr); |
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~LibContext(); |
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void EnableMultiThreaded(); |
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int GetAttr(const char *c_path, struct stat *info); |
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int Readlink(const char *path, char *buf, size_t size); |
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int ListDirectory(const char *path, |
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char ***buf, |
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size_t *listlen, |
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size_t *buflen, |
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bool self_reference); |
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int ListDirectoryStat(const char *c_path, |
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cvmfs_stat_t **buf, |
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size_t *listlen, |
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size_t *buflen); |
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int Open(const char *c_path); |
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int64_t Pread(int fd, void *buf, uint64_t size, uint64_t off); |
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int Close(int fd); |
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int GetExtAttr(const char *c_path, struct cvmfs_attr *info); |
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int GetNestedCatalogAttr(const char *c_path, struct cvmfs_nc_attr *nc_attr); |
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int ListNestedCatalogs(const char *path, char ***buf, size_t *buflen); |
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int Remount(); |
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uint64_t GetRevision(); |
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MountPoint *mount_point() { return mount_point_; } |
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void set_options_mgr(OptionsManager *value) { options_mgr_ = value; } |
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private: |
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/** |
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* File descriptors of chunked files have bit 30 set. |
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*/ |
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static const int kFdChunked = 1 << 30; |
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/** |
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* use static method Create() for construction |
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*/ |
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LibContext(); |
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FileSystem *file_system() { return LibGlobals::GetInstance()->file_system(); } |
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void AppendStringToList(char const *str, |
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char ***buf, |
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size_t *listlen, |
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size_t *buflen); |
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void AppendStatToList(const cvmfs_stat_t st, |
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cvmfs_stat_t **buf, |
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size_t *listlen, |
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size_t *buflen); |
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bool GetDirentForPath(const PathString &path, |
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catalog::DirectoryEntry *dirent); |
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void CvmfsAttrFromDirent(const catalog::DirectoryEntry dirent, |
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struct cvmfs_attr *attr); |
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/** |
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* Only non-NULL if cvmfs_attache_repo is used for initialization. In this |
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* case, the options manager needs to be cleaned up by cvmfs_fini. |
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*/ |
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OptionsManager *options_mgr_; |
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MountPoint *mount_point_; |
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/** |
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* Used to prevent construction/destruction of an InterruptCue object in every |
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* file system operation. |
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*/ |
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InterruptCue default_interrupt_cue_; |
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}; |
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#endif // CVMFS_LIBCVMFS_INT_H_ |
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