PeContainer.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 PE_CONTAINER_H
#define PE_CONTAINER_H

#include "storage/Container.h"
#include "storage/Dm.h"

#define UNKNOWN_PV_DEVICE "unknown"

namespace storage
{

class PeContainer : public Container
    {
    friend class Storage;

    public:

        PeContainer(Storage* s, const string& name, const string& device, CType t);
        PeContainer(Storage* s, const string& name, const string& device, CType t,
                    SystemInfo& systeminfo);
        PeContainer(Storage* s, CType t, const xmlNode* node);
        PeContainer(const PeContainer& c);
        virtual ~PeContainer();

        void saveData(xmlNode* node) const;

        unsigned long long peSize() const { return pe_size; }
        unsigned long peCount() const { return num_pe; }
        unsigned long peFree() const { return free_pe; }
        unsigned numPv() const { return pv.size(); }
        bool hasUnkownPv() const;
        friend std::ostream& operator<< (std::ostream&, const PeContainer& );
        bool addedPv( const string& dev ) const;
        unsigned long sizeToLe( unsigned long long sizeK ) const;

        int setPeSize( long long unsigned, bool lvm1 );
        void calcSize() { size_k = pe_size * num_pe; }
        void unuseDev() const;
        void changeDeviceName( const string& old, const string& nw );

        bool equalContent( const PeContainer& rhs, bool comp_vol=true ) const;

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

        string getDeviceByNumber( const string& majmin ) const;
        string getDeviceByNumber( unsigned long mj, unsigned long mi ) const;
        static bool splitMajMin( const string& majmin, unsigned long& mj, 
                                 unsigned long & mi );
        virtual list<string> getUsing() const;

    protected:
        struct Pv
            {
            Pv() : num_pe(0), free_pe(0) {}
            Pv(const xmlNode* node);

            void saveData(xmlNode* node) const;

            string device;
            string dmcryptDevice;
            string uuid;
            string status;
            unsigned long num_pe;
            unsigned long free_pe;

            string realDevice() const { return dmcryptDevice.empty() ? device : dmcryptDevice; }

            static bool comp_le( const Pv& a, const Pv& b )
                { return( a.free_pe<b.free_pe ); }
            static bool no_free( const Pv& a )
                { return( a.free_pe==0 ); }

            bool operator== ( const Pv& rhs ) const
                { return( device==rhs.device ); }
            bool operator== ( const string& dev ) const
                { return( device==dev); }
            bool equalContent(const Pv& rhs) const
            {
                return device == rhs.device && dmcryptDevice == rhs.dmcryptDevice && uuid == rhs.uuid &&
                    status == rhs.status && num_pe == rhs.num_pe && free_pe == rhs.free_pe; 
            }
            };

        // iterators over Dm volumes
        typedef CastIterator<VIter, Dm *> DmInter;
        typedef CastIterator<CVIter, const Dm *> DmCInter;
        template< class Pred >
            struct DmPI { typedef ContainerIter<Pred, DmInter> type; };
        template< class Pred >
            struct DmCPI { typedef ContainerIter<Pred, DmCInter> type; };
        typedef CheckFnc<const Dm> CheckFncDm;
        typedef CheckerIterator< CheckFncDm, DmPI<CheckFncDm>::type,
                                 DmInter, Dm > DmPIterator;
        typedef CheckerIterator< CheckFncDm, DmCPI<CheckFncDm>::type,
                                 DmCInter, const Dm > DmCPIterator;
        typedef DerefIterator<DmPIterator,Dm> DmIter;
        typedef DerefIterator<DmCPIterator,const Dm> ConstDmIter;
        typedef IterPair<DmIter> DmPair;
        typedef IterPair<ConstDmIter> ConstDmPair;

        DmPair dmPair( bool (* Check)( const Dm& )=NULL)
            {
            return( DmPair( dmBegin( Check ), dmEnd( Check ) ));
            }
        DmIter dmBegin( bool (* Check)( const Dm& )=NULL)
            {
            IterPair<DmInter> p( (DmInter(begin())), (DmInter(end())) );
            return( DmIter( DmPIterator( p, Check )) );
            }
        DmIter dmEnd( bool (* Check)( const Dm& )=NULL)
            {
            IterPair<DmInter> p( (DmInter(begin())), (DmInter(end())) );
            return( DmIter( DmPIterator( p, Check, true )) );
            }

        ConstDmPair dmPair( bool (* Check)( const Dm& )=NULL) const
            {
            return( ConstDmPair( dmBegin( Check ), dmEnd( Check ) ));
            }
        ConstDmIter dmBegin( bool (* Check)( const Dm& )=NULL) const
            {
            IterPair<DmCInter> p( (DmCInter(begin())), (DmCInter(end())) );
            return( ConstDmIter( DmCPIterator( p, Check )) );
            }
        ConstDmIter dmEnd( bool (* Check)( const Dm& )=NULL) const
            {
            IterPair<DmCInter> p( (DmCInter(begin())), (DmCInter(end())) );
            return( ConstDmIter( DmCPIterator( p, Check, true )) );
            }


        friend std::ostream& operator<< (std::ostream&, const Pv& );
        friend void printDevList (std::ostream&, const std::list<Pv>& );

        string addList() const;
        virtual void print( std::ostream& s ) const { s << *this; }
        virtual Container* getCopy() const = 0; // { return( new PeContainer( *this ) ); }
        bool findPe(const string& dev, const list<Pv>& pl, list<Pv>::const_iterator& i) const;
        bool findPe(const string& dev, list<Pv>& pl, list<Pv>::iterator& i) const;
        unsigned long leByLvRemove() const;
        int tryUnusePe( const string& dev, std::list<Pv>& pl, std::list<Pv>& pladd,
                        std::list<Pv>& plrem, unsigned long& removed_pe );
        bool checkCreateConstraints();
        static int addLvPeDistribution( unsigned long le, unsigned stripe,
                                        std::list<Pv>& pl, std::list<Pv>& pladd, 
                                        std::map<string,unsigned long>& pe_map );
        int remLvPeDistribution( unsigned long le, std::map<string,unsigned long>& pe_map,
                                 std::list<Pv>& pl, std::list<Pv>& pladd );
        virtual bool checkConsistency() const;

        void addPv(const Pv& p);

        unsigned long long pe_size;
        unsigned long num_pe;
        unsigned long free_pe;
        std::list<Pv> pv;
        std::list<Pv> pv_add;
        std::list<Pv> pv_remove;

    private:

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

    };

}

#endif