72 lines
2.8 KiB
C++
72 lines
2.8 KiB
C++
/* Copyright (C) 2012 Mike Fleetwood
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Library General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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/* LVM2_PV_Info
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*
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* A persistent cache of information about LVM2 PVs that helps to
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* minimize the number of executions of lvm commands used to query
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* their attributes.
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*/
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#ifndef LVM2_PV_INFO_H_
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#define LVM2_PV_INFO_H_
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#include "../include/Utils.h"
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namespace GParted
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{
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class LVM2_PV_Info
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{
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public:
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LVM2_PV_Info() ;
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LVM2_PV_Info( bool do_refresh ) ;
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~LVM2_PV_Info() ;
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bool is_lvm2_pv_supported() ;
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Glib::ustring get_vg_name( const Glib::ustring & path ) ;
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Byte_Value get_size_bytes( const Glib::ustring & path ) ;
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Byte_Value get_free_bytes( const Glib::ustring & path ) ;
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bool has_active_lvs( const Glib::ustring & path ) ;
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bool is_vg_exported( const Glib::ustring & vgname ) ;
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std::vector<Glib::ustring> get_vg_members( const Glib::ustring & vgname ) ;
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std::vector<Glib::ustring> get_error_messages( const Glib::ustring & path ) ;
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private:
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void initialize_if_required() ;
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void set_command_found() ;
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void load_lvm2_pv_info_cache() ;
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Glib::ustring get_pv_attr_by_path( const Glib::ustring & path, unsigned int entry ) const ;
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Glib::ustring get_pv_attr_by_row( unsigned int row, unsigned int entry ) const ;
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Glib::ustring get_vg_attr_by_name( const Glib::ustring & vgname, unsigned int entry ) const ;
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Glib::ustring get_vg_attr_by_row( unsigned int row, unsigned int entry ) const ;
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static Glib::ustring get_attr_by_name( const std::vector<Glib::ustring> cache,
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const Glib::ustring name, unsigned int entry ) ;
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static Glib::ustring get_attr_by_row( const std::vector<Glib::ustring> cache,
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unsigned int row, unsigned int entry ) ;
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static Byte_Value lvm2_pv_attr_to_num( const Glib::ustring str ) ;
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static bool bit_set( const Glib::ustring & attr, unsigned int bit ) ;
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static bool lvm2_pv_info_cache_initialized ;
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static bool lvm_found ;
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static std::vector<Glib::ustring> lvm2_pv_cache ;
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static std::vector<Glib::ustring> lvm2_vg_cache ;
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static std::vector<Glib::ustring> error_messages ;
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};
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}//GParted
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#endif /*LVM2_PV_INFO_H_*/
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