Loop.h

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/*
 * Copyright (c) [2004-2009] 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 LOOP_H
#define LOOP_H

#include "storage/Volume.h"

namespace storage
{
class LoopCo;
    class SystemInfo;


class Loop : public Volume
    {
    public:

        Loop( const LoopCo& d, const string& LoopDev, const string& LoopFile,
              bool dmcrypt, const string& dm_dev,
             SystemInfo& systeminfo, SystemCmd& losetup);
        Loop( const LoopCo& d, const string& file, bool reuseExisting,
              unsigned long long sizeK, bool dmcr );
        Loop(const LoopCo& c, const Loop& v);
        virtual ~Loop();

        const string& loopFile() const { return lfile; }
        void setLoopFile( const string& file );
        bool getReuse() const { return reuseFile; }
        void setReuse( bool reuseExisting );
        void setDelFile( bool val=true ) { delFile=val; }
        bool removeFile();
        bool createFile();
        string lfileRealPath() const;
        void setDmcryptDev( const string& dm_dev, bool active=true );
        friend std::ostream& operator<< (std::ostream& s, const Loop& l );

        virtual void print( std::ostream& s ) const { s << *this; }
        virtual int setEncryption( bool val, storage::EncryptType typ=storage::ENC_LUKS );

        Text removeText( bool doing ) const;
        Text createText( bool doing ) const;
        Text formatText( bool doing ) const;

        void getInfo( storage::LoopInfo& info ) const;
        bool equalContent( const Loop& rhs ) const;

        void logDifference(std::ostream& log, const Loop& rhs) const;

        static unsigned loopMajor();
        static string loopDeviceName( unsigned num );

        static bool notDeleted( const Loop& l ) { return( !l.deleted() ); }

    protected:

        void checkReuse();

        string lfile;
        bool reuseFile;
        bool delFile;

        static unsigned loop_major;

        mutable storage::LoopInfo info; // workaround for broken ycp bindings

    private:

        Loop(const Loop&);            // disallow
        Loop& operator=(const Loop&); // disallow

    };

}

#endif