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/* Copyright (c) 2012 The Chromium Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef LIBRARIES_NACL_MOUNTS_MOUNT_NODE_H_
#define LIBRARIES_NACL_MOUNTS_MOUNT_NODE_H_
#include <sys/stat.h>
#include <string>
#include "ref_object.h"
struct dirent;
struct stat;
class Mount;
class MountNode;
class MountNode : public RefObject {
protected:
virtual ~MountNode();
protected:
MountNode(Mount* mount, int ino, int dev);
virtual bool Init(int mode, short uid, short gid);
virtual int Close();
public:
// Normal OS operations on a node (file), can be called by the kernel
// directly so it must lock and unlock appropriately. These functions
// must not be called by the mount.
virtual int FSync();
virtual int GetDents(size_t offs, struct dirent* pdir, size_t count);
virtual int GetStat(struct stat* stat);
virtual int Ioctl(int request, char* arg);
virtual int Read(size_t offs, void* buf, size_t count);
virtual int Truncate(size_t size);
virtual int Write(size_t offs, const void* buf, size_t count);
virtual int GetLinks() const;
virtual int GetMode() const;
virtual int GetType() const;
virtual size_t GetSize() const;
virtual bool IsaDir() const;
virtual bool IsaFile() const;
virtual bool IsaTTY() const;
protected:
// Directory operations on the node are done by the Mount. The mount's lock
// must be held while these calls are made.
// Adds or removes a directory entry updating the link numbers and refcount
virtual int AddChild(const std::string& name, MountNode *node);
virtual int RemoveChild(const std::string& name);
// Find a child and return it without updating the refcount
virtual MountNode* FindChild(const std::string& name);
virtual int ChildCount();
// Update the link count
virtual void Link();
virtual void Unlink();
protected:
struct stat stat_;
Mount* mount_;
friend class MountHFS;
friend class MountMem;
friend class MountNodeDir;
};
#endif // LIBRARIES_NACL_MOUNTS_MOUNT_NODE_H_
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