87 lines
1.7 KiB
C++
87 lines
1.7 KiB
C++
/*
|
|
* \brief File-system node
|
|
* \author Norman Feske
|
|
* \date 2012-04-11
|
|
*/
|
|
|
|
/*
|
|
* Copyright (C) 2012-2017 Genode Labs GmbH
|
|
*
|
|
* This file is part of the Genode OS framework, which is distributed
|
|
* under the terms of the GNU Affero General Public License version 3.
|
|
*/
|
|
|
|
#ifndef _NODE_H_
|
|
#define _NODE_H_
|
|
|
|
/* Genode includes */
|
|
#include <file_system/node.h>
|
|
#include <util/list.h>
|
|
#include <base/lock.h>
|
|
#include <base/signal.h>
|
|
|
|
namespace Trace_fs {
|
|
using namespace File_system;
|
|
using namespace Genode;
|
|
class Node;
|
|
}
|
|
|
|
class Trace_fs::Node : public Node_base, public List<Node>::Element
|
|
{
|
|
public:
|
|
|
|
typedef char Name[128];
|
|
|
|
private:
|
|
|
|
Name _name;
|
|
unsigned long const _inode;
|
|
|
|
/**
|
|
* Generate unique inode number
|
|
*/
|
|
static unsigned long _unique_inode()
|
|
{
|
|
static unsigned long inode_count;
|
|
return ++inode_count;
|
|
}
|
|
|
|
public:
|
|
|
|
Node()
|
|
: _inode(_unique_inode())
|
|
{ _name[0] = 0; }
|
|
|
|
unsigned long inode() const { return _inode; }
|
|
char const *name() const { return _name; }
|
|
|
|
/**
|
|
* Assign name
|
|
*/
|
|
void name(char const *name) { strncpy(_name, name, sizeof(_name)); }
|
|
|
|
virtual Status status() const = 0;
|
|
|
|
virtual size_t read(char *dst, size_t len, seek_off_t) = 0;
|
|
virtual size_t write(char const *src, size_t len, seek_off_t) = 0;
|
|
|
|
/*
|
|
* Directory functionality
|
|
*/
|
|
virtual Node *lookup(char const *path, bool return_parent = false)
|
|
{
|
|
Genode::error(__PRETTY_FUNCTION__, " called on a non-directory node");
|
|
return nullptr;
|
|
}
|
|
|
|
/*
|
|
* File functionality
|
|
*/
|
|
virtual void truncate(file_size_t size)
|
|
{
|
|
Genode::error(__PRETTY_FUNCTION__, " called on a non-file node");
|
|
}
|
|
};
|
|
|
|
#endif /* _NODE_H_ */
|