LvmVg.h

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/*
 * Copyright (c) [2004-2010] 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 LVM_VG_H
#define LVM_VG_H

#include "storage/PeContainer.h"
#include "storage/LvmLv.h"


namespace storage
{
    using std::list;


class LvmVg : public PeContainer
    {
    friend class Storage;
    friend class LvmLv;

    public:

        LvmVg(Storage* s, const string& name, const string& device, bool lvm1);
        LvmVg(Storage* s, const string& name, const string& device, SystemInfo& systeminfo);
        LvmVg(Storage* s, const xmlNode* node);
        LvmVg(const LvmVg& c);
        virtual ~LvmVg();

        void saveData(xmlNode* node) const;

        unsigned numLv() const;
        bool lvm2() const { return( !lvm1 ); }
        static storage::CType staticType() { return storage::LVM; }
        friend std::ostream& operator<< (std::ostream&, const LvmVg& );

        int removeVg();
        int extendVg( const std::list<string>& dl );
        int extendVg( const string& device );
        int reduceVg( const std::list<string>& dl );
        int reduceVg( const string& device );
        int createLv( const string& name, unsigned long long sizeK,
                      unsigned stripe, string& device );
        int removeLv( const string& name );
        int changeStripe( const string& name, unsigned long stripe );
        int changeStripeSize( const string& name,
                              unsigned long long stripeSize );

        int createLvSnapshot(const string& origin, const string& name,
                             unsigned long long cowSizeK, string& device);
        int removeLvSnapshot(const string& name);
        int getLvSnapshotState(const string& name, LvmLvSnapshotStateInfo& info);

        int setPeSize( long long unsigned peSizeK );
        void normalizeDmDevices();
        void getCommitActions(list<commitAction>& l) const;
        void getToCommit(storage::CommitStage stage, list<const Container*>& col,
                         list<const Volume*>& vol) const;
        int commitChanges( storage::CommitStage stage );
        int resizeVolume( Volume* v, unsigned long long newSize );
        int removeVolume( Volume* v );
        void getInfo( storage::LvmVgInfo& info ) const;
        bool equalContent( const Container& rhs ) const;

        void logDifference(std::ostream& log, const LvmVg& rhs) const;
        virtual void logDifferenceWithVolumes(std::ostream& log, const Container& rhs) const;

        static void activate(bool val);
        static bool isActive() { return active; }

        static list<string> getVgs();

    protected:
        // iterators over LVM LVs
        // protected typedefs for iterators over LVMLVs
        typedef CastIterator<VIter, LvmLv *> LvmLvInter;
        typedef CastIterator<CVIter, const LvmLv *> LvmLvCInter;
        template< class Pred >
            struct LvmLvPI { typedef ContainerIter<Pred, LvmLvInter> type; };
        template< class Pred >
            struct LvmLvCPI { typedef ContainerIter<Pred, LvmLvCInter> type; };
        typedef CheckFnc<const LvmLv> CheckFncLvmLv;
        typedef CheckerIterator< CheckFncLvmLv, LvmLvPI<CheckFncLvmLv>::type,
                                 LvmLvInter, LvmLv > LvmLvPIterator;
        typedef CheckerIterator< CheckFncLvmLv, LvmLvCPI<CheckFncLvmLv>::type,
                                 LvmLvCInter, const LvmLv > LvmLvCPIterator;
        typedef DerefIterator<LvmLvPIterator,LvmLv> LvmLvIter;
        typedef DerefIterator<LvmLvCPIterator,const LvmLv> ConstLvmLvIter;
        typedef IterPair<LvmLvIter> LvmLvPair;
        typedef IterPair<ConstLvmLvIter> ConstLvmLvPair;

        LvmLvPair lvmLvPair( bool (* Check)( const LvmLv& )=NULL)
            {
            return( LvmLvPair( lvmLvBegin( Check ), lvmLvEnd( Check ) ));
            }
        LvmLvIter lvmLvBegin( bool (* Check)( const LvmLv& )=NULL)
            {
            IterPair<LvmLvInter> p( (LvmLvInter(begin())), (LvmLvInter(end())) );
            return( LvmLvIter( LvmLvPIterator( p, Check )) );
            }
        LvmLvIter lvmLvEnd( bool (* Check)( const LvmLv& )=NULL)
            {
            IterPair<LvmLvInter> p( (LvmLvInter(begin())), (LvmLvInter(end())) );
            return( LvmLvIter( LvmLvPIterator( p, Check, true )) );
            }

        ConstLvmLvPair lvmLvPair( bool (* Check)( const LvmLv& )=NULL) const
            {
            return( ConstLvmLvPair( lvmLvBegin( Check ), lvmLvEnd( Check ) ));
            }
        ConstLvmLvIter lvmLvBegin( bool (* Check)( const LvmLv& )=NULL) const
            {
            IterPair<LvmLvCInter> p( (LvmLvCInter(begin())), (LvmLvCInter(end())) );
            return( ConstLvmLvIter( LvmLvCPIterator( p, Check )) );
            }
        ConstLvmLvIter lvmLvEnd( bool (* Check)( const LvmLv& )=NULL) const
            {
            IterPair<LvmLvCInter> p( (LvmLvCInter(begin())), (LvmLvCInter(end())) );
            return( ConstLvmLvIter( LvmLvCPIterator( p, Check, true )) );
            }

        void getVgData( const string& name, bool exists=true );

        virtual void print( std::ostream& s ) const { s << *this; }
        virtual Container* getCopy() const { return( new LvmVg( *this ) ); }

        Text createText(bool doing) const;
        Text removeText(bool doing) const;
        Text extendText(bool doing, const string& dev) const;
        Text reduceText(bool doing, const string& dev) const;

        int doCreateVg();
        int doRemoveVg();
        int doExtendVg();
        int doReduceVg();
        int doCreate( Volume* v );
        int doRemove( Volume* v );
        int doResize( Volume* v );
        int doCreatePv(const Pv& pv);

        string metaString() const;
        string instSysString() const;

        virtual void logData(const string& Dir) const;

        void addLv(unsigned long& le, string& name, string& origin, string& uuid,
                   string& status, string& alloc, bool& ro);
        void addPv( Pv*& p );

        string status;
        string uuid;
        bool lvm1;

        static bool active;

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

    private:

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

    };

}

#endif

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