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/*
* Copyright (c) [2012-2013] Novell, Inc.
*
* All Rights Reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2 of the GNU General Public License as published
* by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, contact Novell, Inc.
*
* To contact Novell about this file by physical or electronic mail, you may
* find current contact information at www.novell.com.
*/
#ifndef SNAPPER_META_SNAPPER_H
#define SNAPPER_META_SNAPPER_H
#include <boost/thread.hpp>
#include <snapper/Snapper.h>
using namespace std;
using namespace snapper;
class RefCounter : private boost::noncopyable
{
public:
RefCounter();
int inc_use_count();
int dec_use_count();
void update_use_time();
int use_count() const;
int unused_for() const;
private:
static time_t monotonic_time();
mutable boost::mutex mutex;
int counter;
time_t last_used;
};
class RefHolder
{
public:
RefHolder(RefCounter& ref) : ref(ref)
{ ref.inc_use_count(); }
~RefHolder()
{ ref.dec_use_count(); }
private:
RefCounter& ref;
};
struct UnknownConfig : public std::exception
{
explicit UnknownConfig() throw() {}
virtual const char* what() const throw() { return "unknown config"; }
};
class MetaSnapper : public RefCounter
{
public:
MetaSnapper(ConfigInfo& config_info);
~MetaSnapper();
const string& configName() const { return config_info.getConfigName(); }
const ConfigInfo& getConfigInfo() const { return config_info; }
void setConfigInfo(const map<string, string>& raw);
vector<uid_t> uids;
vector<gid_t> gids;
Snapper* getSnapper();
bool is_equal(const Snapper* s) { return snapper && snapper == s; }
bool is_loaded() const { return snapper; }
void unload();
private:
void set_permissions();
ConfigInfo config_info;
Snapper* snapper;
};
class MetaSnappers
{
public:
MetaSnappers();
~MetaSnappers();
void init();
typedef list<MetaSnapper>::iterator iterator;
typedef list<MetaSnapper>::const_iterator const_iterator;
iterator begin() { return entries.begin(); }
const_iterator begin() const { return entries.begin(); }
iterator end() { return entries.end(); }
const_iterator end() const { return entries.end(); }
bool empty() const { return entries.empty(); }
iterator find(const string& config_name);
void createConfig(const string& config_name, const string& subvolume, const string& fstype,
const string& template_name);
void deleteConfig(iterator);
private:
list<MetaSnapper> entries;
};
extern MetaSnappers meta_snappers;
#endif
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