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107 lines
2.8 KiB
C++
107 lines
2.8 KiB
C++
/*****************************************************************************
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* Author: Valient Gough <vgough@pobox.com>
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*
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*****************************************************************************
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* Copyright (c) 2007, Valient Gough
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*
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* This program is free software: you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published by the
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* Free Software Foundation, either version 3 of the License, or (at your
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* option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
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* for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef _Context_incl_
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#define _Context_incl_
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#include <set>
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#ifdef USE_HASHMAP
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#include <ext/hash_map>
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#else
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#include <map>
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#endif
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#include "encfs.h"
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#include "shared_ptr.h"
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struct EncFS_Args;
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struct EncFS_Opts;
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class FileNode;
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class DirNode;
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class EncFS_Context {
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public:
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EncFS_Context();
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~EncFS_Context();
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shared_ptr<FileNode> getNode(void *ptr);
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shared_ptr<FileNode> lookupNode(const char *path);
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int getAndResetUsageCounter();
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int openFileCount() const;
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void *putNode(const char *path, const shared_ptr<FileNode> &node);
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void eraseNode(const char *path, void *placeholder);
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void renameNode(const char *oldName, const char *newName);
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void setRoot(const shared_ptr<DirNode> &root);
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shared_ptr<DirNode> getRoot(int *err);
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bool isMounted();
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shared_ptr<EncFS_Args> args;
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shared_ptr<EncFS_Opts> opts;
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bool publicFilesystem;
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// root path to cipher dir
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std::string rootCipherDir;
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// for idle monitor
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bool running;
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pthread_t monitorThread;
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pthread_cond_t wakeupCond;
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pthread_mutex_t wakeupMutex;
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private:
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/* This placeholder is what is referenced in FUSE context (passed to
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* callbacks).
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*
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* A FileNode may be opened many times, but only one FileNode instance per
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* file is kept. Rather then doing reference counting in FileNode, we
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* store a unique Placeholder for each open() until the corresponding
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* release() is called. shared_ptr then does our reference counting for
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* us.
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*/
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struct Placeholder {
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shared_ptr<FileNode> node;
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Placeholder(const shared_ptr<FileNode> &ptr) : node(ptr) {}
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};
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#ifdef USE_HASHMAP
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// set of open files, indexed by path
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typedef __gnu_cxx::hash_map<std::string, std::set<Placeholder *> > FileMap;
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#else
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typedef std::map<std::string, std::set<Placeholder *> > FileMap;
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#endif
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mutable pthread_mutex_t contextMutex;
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FileMap openFiles;
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int usageCount;
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shared_ptr<DirNode> root;
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};
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int remountFS(EncFS_Context *ctx);
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#endif
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