84 lines
2.6 KiB
C++
84 lines
2.6 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 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, see <http://www.gnu.org/licenses/>.
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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 GPARTED_LVM2_PV_INFO_H
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#define GPARTED_LVM2_PV_INFO_H
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#include "BlockSpecial.h"
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#include "Utils.h"
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#include <glibmm/ustring.h>
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#include <vector>
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namespace GParted
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{
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struct LVM2_PV
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{
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BlockSpecial pv_name;
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Byte_Value pv_size;
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Byte_Value pv_free;
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Glib::ustring vg_name;
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};
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struct LVM2_VG
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{
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Glib::ustring vg_name;
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Glib::ustring vg_attr;
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Glib::ustring lv_name;
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Glib::ustring lv_attr;
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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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static bool is_lvm2_pv_supported();
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static void clear_cache();
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static const Glib::ustring& get_vg_name(const Glib::ustring& path);
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static Byte_Value get_size_bytes( const Glib::ustring & path );
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static Byte_Value get_free_bytes( const Glib::ustring & path );
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static bool has_active_lvs( const Glib::ustring & path );
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static bool is_vg_exported( const Glib::ustring & vgname );
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static std::vector<Glib::ustring> get_vg_members( const Glib::ustring & vgname );
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static std::vector<Glib::ustring> get_vg_lvs( const Glib::ustring & vgname );
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static std::vector<Glib::ustring> get_error_messages( const Glib::ustring & path );
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private:
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static void initialize_if_required();
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static void set_command_found();
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static void load_lvm2_pv_info_cache();
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static const LVM2_PV & get_pv_cache_entry_by_name( const Glib::ustring & pvname );
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static const LVM2_VG & get_vg_cache_entry_by_name( const Glib::ustring & vgname );
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static Byte_Value lvm2_pv_size_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<LVM2_PV> lvm2_pv_cache;
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static std::vector<LVM2_VG> 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 /* GPARTED_LVM2_PV_INFO_H */
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