514 lines
17 KiB
C++
514 lines
17 KiB
C++
/* Copyright (C) 2009, 2010, 2011 Curtis Gedak
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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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#include "DMRaid.h"
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#include "Partition.h"
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#include <limits.h>
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#include <stdlib.h> //atoi function
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namespace GParted
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{
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//Initialize static data elements
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bool DMRaid::dmraid_cache_initialized = false ;
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bool DMRaid::dmraid_found = false ;
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bool DMRaid::dmsetup_found = false ;
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bool DMRaid::udevinfo_found = false ;
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bool DMRaid::udevadm_found = false ;
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std::vector<Glib::ustring> DMRaid::dmraid_devices ;
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DMRaid::DMRaid()
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{
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//Ensure that cache has been loaded at least once
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if ( ! dmraid_cache_initialized )
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{
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dmraid_cache_initialized = true ;
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set_commands_found() ;
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load_dmraid_cache() ;
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}
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}
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DMRaid::DMRaid( const bool & do_refresh )
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{
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//Ensure that cache has been loaded at least once
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if ( ! dmraid_cache_initialized )
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{
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dmraid_cache_initialized = true ;
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set_commands_found() ;
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if ( do_refresh == false )
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load_dmraid_cache() ;
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}
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if ( do_refresh )
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load_dmraid_cache() ;
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}
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DMRaid::~DMRaid()
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{
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}
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void DMRaid::load_dmraid_cache()
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{
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//Load data into dmraid structures
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Glib::ustring output, error ;
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dmraid_devices .clear() ;
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if ( dmraid_found )
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{
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if ( ! Utils::execute_command( "dmraid -sa -c", output, error, true ) )
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{
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Glib::ustring temp = Utils::regexp_label( output, "^(no raid disks).*" ) ;
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if ( temp != "no raid disks" )
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Utils::tokenize( output, dmraid_devices, "\n" ) ;
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}
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}
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}
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void DMRaid::set_commands_found()
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{
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//Set status of commands found
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dmraid_found = (! Glib::find_program_in_path( "dmraid" ) .empty() ) ;
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dmsetup_found = (! Glib::find_program_in_path( "dmsetup" ) .empty() ) ;
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udevinfo_found = (! Glib::find_program_in_path( "udevinfo" ) .empty() ) ;
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udevadm_found = (! Glib::find_program_in_path( "udevadm" ) .empty() ) ;
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}
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bool DMRaid::is_dmraid_supported()
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{
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//Determine if dmraid is supported on this computer
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return ( dmraid_found && dmsetup_found ) ;
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}
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bool DMRaid::is_dmraid_device( const Glib::ustring & dev_path )
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{
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//Determine if the device is a dmraid device
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bool device_found = false ; //assume not found
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if ( is_dmraid_supported() )
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{
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for ( unsigned int k=0; k < dmraid_devices .size(); k++ )
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if ( dev_path .find( dmraid_devices[k] ) != Glib::ustring::npos )
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device_found = true ;
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}
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//Some distros appear to default to /dev/dm-# for device names, so
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// also check with udev to see if they are in fact dmraid devices
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if ( ! device_found && ( dev_path .find( "/dev/dm" ) != Glib::ustring::npos ) )
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{
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//Ensure we use the base device name if dev_path in form /dev/dm-#p#
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Glib::ustring regexp = "(/dev/dm-[0-9]+)p[0-9]+" ;
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Glib::ustring dev_path_only = Utils::regexp_label( dev_path, regexp ) ;
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if ( dev_path_only .empty() )
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dev_path_only = dev_path ;
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Glib::ustring udev_name = get_udev_dm_name( dev_path_only ) ;
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if ( ! udev_name .empty() )
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{
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for ( unsigned int k=0; k < dmraid_devices .size(); k++ )
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if ( udev_name .find( dmraid_devices[k] ) != Glib::ustring::npos )
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device_found = true ;
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}
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//Also check for a symbolic link if device not yet found
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if ( ! device_found && file_test( dev_path, Glib::FILE_TEST_IS_SYMLINK ) )
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{
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//Path is a symbolic link so find real path
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char * rpath = realpath( dev_path.c_str(), NULL );
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if ( rpath != NULL )
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{
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Glib::ustring tmp_path = rpath;
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free( rpath );
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if ( tmp_path .length() > 0 )
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for ( unsigned int k=0; k < dmraid_devices .size(); k++ )
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if ( tmp_path .find( dmraid_devices[k] ) != Glib::ustring::npos )
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device_found = true ;
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}
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}
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}
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return device_found ;
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}
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//FIXME: Copy of code from FileSystem.cc.
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// This should be replaced when a general execute_command with asynchronous updates is built.
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int DMRaid::execute_command( const Glib::ustring & command, OperationDetail & operationdetail )
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{
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Glib::ustring output, error ;
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operationdetail .add_child( OperationDetail( command, STATUS_NONE, FONT_BOLD_ITALIC ) ) ;
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int exit_status = Utils::execute_command( "nice -n 19 " + command, output, error ) ;
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if ( ! output .empty() )
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operationdetail .get_last_child() .add_child( OperationDetail( output, STATUS_NONE, FONT_ITALIC ) ) ;
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if ( ! error .empty() )
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operationdetail .get_last_child() .add_child( OperationDetail( error, STATUS_NONE, FONT_ITALIC ) ) ;
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return exit_status ;
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}
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void DMRaid::get_devices( std::vector<Glib::ustring> & device_list )
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{
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//Retrieve list of dmraid devices
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device_list .clear() ;
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for ( unsigned int k=0; k < dmraid_devices .size(); k++ )
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device_list.push_back( DEV_MAPPER_PATH + dmraid_devices[k] );
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}
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Glib::ustring DMRaid::get_dmraid_name( const Glib::ustring & dev_path )
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{
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//Retrieve name of dmraid device
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Glib::ustring dmraid_name = "" ;
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Glib::ustring regexp = "" ;
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for ( unsigned int k=0; k < dmraid_devices .size(); k++ )
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{
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regexp = ".*(" + dmraid_devices[k] + ").*" ;
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if ( Utils::regexp_label( dev_path, regexp ) == dmraid_devices[k] )
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dmraid_name = dmraid_devices[k] ;
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}
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//Some distros appear to default to /dev/dm-# for device names, so
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// also check with udev for dmraid name
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if ( dmraid_name .empty() && ( dev_path .find( "/dev/dm" ) != Glib::ustring::npos ) )
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{
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Glib::ustring udev_name = get_udev_dm_name( dev_path ) ;
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for ( unsigned int k=0; k < dmraid_devices .size(); k++ )
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if ( udev_name .find( dmraid_devices[k] ) != Glib::ustring::npos )
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dmraid_name = dmraid_devices[k] ;
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//Also check for a symbolic link if dmraid_name not yet found
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if ( dmraid_name .empty() && file_test( dev_path, Glib::FILE_TEST_IS_SYMLINK ) )
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{
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//Path is a symbolic link so find real path
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char * rpath = realpath( dev_path.c_str(), NULL );
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if ( rpath != NULL )
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{
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Glib::ustring tmp_path = rpath;
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free( rpath );
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if ( tmp_path .length() > 0 )
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for ( unsigned int k=0; k < dmraid_devices .size(); k++ )
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if ( tmp_path .find( dmraid_devices[k] ) != Glib::ustring::npos )
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dmraid_name = dmraid_devices[k] ;
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}
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}
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}
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return dmraid_name ;
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}
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void DMRaid::get_dmraid_dir_entries( const Glib::ustring & dev_path, std::vector<Glib::ustring> & dir_list )
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{
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//Build list of all device entries matching device path
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Glib::ustring dmraid_name = get_dmraid_name( dev_path ) ;
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//Loop through the entries in the directory
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Glib::ustring filename = "" ;
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Glib::Dir dir( DEV_MAPPER_PATH );
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while ( ( filename = dir .read_name() ) != "" )
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{
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if ( filename == "control" )
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continue ;
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if ( Utils::regexp_label( filename, "^(" + dmraid_name + ")" ) == dmraid_name )
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dir_list .push_back( filename ) ;
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}
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}
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int DMRaid::get_partition_number( const Glib::ustring & partition_name )
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{
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Glib::ustring dmraid_name = get_dmraid_name( partition_name ) ;
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return std::atoi( Utils::regexp_label( partition_name, dmraid_name + "p?([0-9]+)" ) .c_str() ) ;
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}
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Glib::ustring DMRaid::get_udev_dm_name( const Glib::ustring & dev_path )
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{
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//Retrieve DM_NAME of device using udev information
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Glib::ustring output = "" ;
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Glib::ustring error = "" ;
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Glib::ustring dm_name = "" ;
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if ( udevinfo_found )
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Utils::execute_command( "udevinfo --query=all --name=" + dev_path, output, error, true ) ;
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else if ( udevadm_found )
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Utils::execute_command( "udevadm info --query=all --name=" + dev_path, output, error, true ) ;
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if ( ! output .empty() )
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{
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Glib::ustring regexp = "^E: DM_NAME=([^\n]*)$" ;
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dm_name = Utils::regexp_label( output, regexp ) ;
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}
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return dm_name ;
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}
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Glib::ustring DMRaid::make_path_dmraid_compatible( Glib::ustring partition_path )
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{
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//The purpose of this method is to ensure that the partition name matches
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// the name that the dmraid command would create.
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//
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//From my experience, the general rule of thumb naming convention for creating
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// partition names is as follows:
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//
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// A) If the device name ends in a number, then append the letter "p" and
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// the partition number to create the partition name.
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// For Example:
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// Device Name : /dev/mapper/isw_cjbdddajhi_Disk0
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// Partition Name: /dev/mapper/isw_cjbdddajhi_Disk0p1
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//
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// B) If the device name does not end in a number, then append the
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// partition number only to create the partition name.
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// For Example:
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// Device Name : /dev/mapper/isw_cjbdddajhi_Volume
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// Partition Name: /dev/mapper/isw_cjbdddajhi_Volume1
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//
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//The dmraid command appears to never add the "p" into the partition name.
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// Instead in all cases dmraid simply appends the partition number to the
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// device name to create a partition name.
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//
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Glib::ustring reg_exp ;
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Glib::ustring partition_number ;
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for ( unsigned int k=0; k < dmraid_devices .size(); k++ )
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{
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reg_exp = DEV_MAPPER_PATH + dmraid_devices[k] + "p([0-9]+)";
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partition_number = Utils::regexp_label( partition_path, reg_exp ) ;
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if ( ! partition_number .empty() )
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{
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partition_path = DEV_MAPPER_PATH + dmraid_devices[k] + partition_number;
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return partition_path ;
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}
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}
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//If parted is configured with --disable-device-mapper then the partition path
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// could default to something like /dev/dm-#p# on some distros, so we need to
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// convert these names back into /dev/mapper entries
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reg_exp = "/dev/dm-[0-9]+p([0-9]+)" ;
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partition_number = Utils::regexp_label( partition_path, reg_exp ) ;
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if ( ! partition_number .empty() )
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{
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reg_exp = "(/dev/dm-[0-9]+)p[0-9]+" ;
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Glib::ustring device_path = Utils::regexp_label( partition_path, reg_exp ) ;
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if ( ! device_path .empty() )
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{
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device_path = get_udev_dm_name( device_path ) ;
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partition_path = DEV_MAPPER_PATH + device_path + partition_number;
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}
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}
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return partition_path ;
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}
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bool DMRaid::create_dev_map_entries( const Partition & partition, OperationDetail & operationdetail )
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{
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//Create all missing dev mapper entries for a specified device.
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Glib::ustring command ;
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bool exit_status = true ;
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/*TO TRANSLATORS: looks like create missing /dev/mapper entries */
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Glib::ustring tmp = String::ucompose ( _("create missing %1 entries"), DEV_MAPPER_PATH );
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operationdetail .add_child( OperationDetail( tmp ) );
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//Newer dmraid defaults to always inserting the letter 'p' between the device name
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// and the partition number. Since the '-P' option is not valid for older dmraid
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// versions, try with and without the '-P' option.
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command = "dmraid -ay -P \"\" -v" ;
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if ( execute_command( command, operationdetail .get_last_child() ) )
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{
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//Above command failed, so try without the '-P' option.
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command = "dmraid -ay -v" ;
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if ( execute_command( command, operationdetail .get_last_child() ) )
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exit_status = false ; //command failed
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}
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operationdetail .get_last_child() .set_status( exit_status ? STATUS_SUCCES : STATUS_ERROR ) ;
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return exit_status ;
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}
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bool DMRaid::create_dev_map_entries( const Glib::ustring & dev_path )
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{
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//Create all missing dev mapper entries for a specified device.
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Glib::ustring command, output, error ;
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bool exit_status = true ;
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//Newer dmraid defaults to always inserting the letter 'p' between the device name
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// and the partition number. Since the '-P' option is not valid for older dmraid
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// versions, try with and without the '-P' option.
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command = "dmraid -ay -P \"\" -v" ;
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if ( Utils::execute_command( command, output, error, true ) )
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{
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//Above command failed, so try without the '-P' option.
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command = "dmraid -ay -v" ;
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if ( Utils::execute_command( command, output, error, true ) )
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exit_status = false; //command failed
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}
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return exit_status ;
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}
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void DMRaid::get_affected_dev_map_entries( const Partition & partition, std::vector<Glib::ustring> & affected_entries )
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{
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//Build list of affected /dev/mapper entries when a partition is to be deleted.
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//Retrieve list of matching directory entries
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std::vector<Glib::ustring> dir_list ;
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get_dmraid_dir_entries( partition .device_path, dir_list );
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//All partition numbers equal to the number of the partition to be deleted
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// will be affected.
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// Also, if the partition is inside an extended partition, then all logical
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// partition numbers greater than the number of the partition to be deleted
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// will be affected.
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Glib::ustring dmraid_name = get_dmraid_name( partition .device_path ) ;
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for ( unsigned int k=0; k < dir_list .size(); k++ )
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{
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if ( Utils::regexp_label( dir_list[k], "^(" + dmraid_name + ")" ) == dmraid_name )
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{
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int dir_part_num = get_partition_number( dir_list[k] ) ;
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if ( dir_part_num == partition .partition_number ||
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( partition .inside_extended && dir_part_num > partition .partition_number )
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)
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affected_entries .push_back( dir_list[k] ) ;
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}
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}
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}
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void DMRaid::get_partition_dev_map_entries( const Partition & partition, std::vector<Glib::ustring> & partition_entries )
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{
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//Build list of all /dev/mapper entries for a partition.
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//Retrieve list of matching directory entries
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std::vector<Glib::ustring> dir_list ;
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get_dmraid_dir_entries( partition .device_path, dir_list );
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//Retrieve all partition numbers equal to the number of the partition.
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Glib::ustring dmraid_name = get_dmraid_name( partition .device_path ) ;
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for ( unsigned int k=0; k < dir_list .size(); k++ )
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{
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if ( Utils::regexp_label( dir_list[k], "^(" + dmraid_name + ")" ) == dmraid_name )
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{
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int dir_part_num = get_partition_number( dir_list[k] ) ;
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if ( dir_part_num == partition .partition_number )
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partition_entries .push_back( dir_list[k] ) ;
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}
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}
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}
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bool DMRaid::delete_affected_dev_map_entries( const Partition & partition, OperationDetail & operationdetail )
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{
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//Delete all affected dev mapper entries (logical partitions >= specificied partition)
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std::vector<Glib::ustring> affected_entries ;
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Glib::ustring command ;
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bool exit_status = true ;
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/*TO TRANSLATORS: looks like delete affected /dev/mapper entries */
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Glib::ustring tmp = String::ucompose ( _("delete affected %1 entries"), DEV_MAPPER_PATH );
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operationdetail .add_child( OperationDetail( tmp ) );
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get_affected_dev_map_entries( partition, affected_entries ) ;
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for ( unsigned int k=0; k < affected_entries .size(); k++ )
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{
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command = "dmsetup remove " + DEV_MAPPER_PATH + affected_entries[k];
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if ( execute_command( command, operationdetail .get_last_child() ) )
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exit_status = false ; //command failed
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}
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operationdetail .get_last_child() .set_status( exit_status ? STATUS_SUCCES : STATUS_ERROR ) ;
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return exit_status ;
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}
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bool DMRaid::delete_dev_map_entry( const Partition & partition, OperationDetail & operationdetail )
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{
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//Delete a single partition which may be represented by multiple dev mapper entries
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bool exit_status = true ;
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/*TO TRANSLATORS: looks like delete /dev/mapper entry */
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Glib::ustring tmp = String::ucompose ( _("delete %1 entry"), DEV_MAPPER_PATH );
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operationdetail .add_child( OperationDetail( tmp ) );
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std::vector<Glib::ustring> partition_entries ;
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get_partition_dev_map_entries( partition, partition_entries ) ;
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for ( unsigned int k = 0; k < partition_entries .size(); k++ )
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{
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Glib::ustring command = "dmsetup remove " + partition_entries[k] ;
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if ( execute_command( command, operationdetail .get_last_child() ) )
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exit_status = false ; //command failed
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}
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operationdetail .get_last_child() .set_status( exit_status ? STATUS_SUCCES : STATUS_ERROR ) ;
|
|
|
|
return exit_status ;
|
|
}
|
|
|
|
bool DMRaid::purge_dev_map_entries( const Glib::ustring & dev_path )
|
|
{
|
|
//Delete all dev mapper entries for dmraid device
|
|
|
|
std::vector<Glib::ustring> dir_list ;
|
|
Glib::ustring command ;
|
|
Glib::ustring output, error ;
|
|
bool exit_status = true ;
|
|
|
|
get_dmraid_dir_entries( dev_path, dir_list ) ;
|
|
|
|
for ( unsigned int k=0; k < dir_list .size(); k++ )
|
|
{
|
|
command = "dmsetup remove " + DEV_MAPPER_PATH + dir_list[k];
|
|
if ( Utils::execute_command( command, output, error, true ) )
|
|
exit_status = false ; //command failed
|
|
}
|
|
|
|
return exit_status ;
|
|
}
|
|
|
|
bool DMRaid::update_dev_map_entry( const Partition & partition, OperationDetail & operationdetail )
|
|
{
|
|
//Update dmraid entry by first deleting the entry then recreating the entry
|
|
|
|
//Skip if extended partition because the only change is to the partition table.
|
|
if ( partition .type == GParted::TYPE_EXTENDED )
|
|
return true ;
|
|
|
|
bool exit_status = true ;
|
|
|
|
/*TO TRANSLATORS: looks like update /dev/mapper entry */
|
|
Glib::ustring tmp = String::ucompose ( _("update %1 entry"), DEV_MAPPER_PATH );
|
|
operationdetail .add_child( OperationDetail( tmp ) );
|
|
|
|
if( ! delete_dev_map_entry( partition , operationdetail .get_last_child() ) )
|
|
exit_status = false ; //command failed
|
|
|
|
if( ! create_dev_map_entries( partition , operationdetail .get_last_child() ) )
|
|
exit_status = false ; //command failed
|
|
|
|
operationdetail .get_last_child() .set_status( exit_status ? STATUS_SUCCES : STATUS_ERROR ) ;
|
|
|
|
return exit_status ;
|
|
}
|
|
|
|
}//GParted
|