gparted/src/nilfs2.cc

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/* Copyright (C) 2011 Mike Fleetwood
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#include "../include/nilfs2.h"
namespace GParted
{
FS nilfs2::get_filesystem_support()
{
FS fs ;
fs .filesystem = GParted::FS_NILFS2 ;
fs .busy = FS::GPARTED ;
if ( ! Glib::find_program_in_path( "mkfs.nilfs2" ) .empty() )
{
fs .create = GParted::FS::EXTERNAL ;
fs .create_with_label = GParted::FS::EXTERNAL ;
}
if ( ! Glib::find_program_in_path( "nilfs-tune" ) .empty() )
{
fs .read = GParted::FS::EXTERNAL ;
fs .read_label = GParted::FS::EXTERNAL ;
fs .write_label = GParted::FS::EXTERNAL ;
fs .read_uuid = GParted::FS::EXTERNAL ;
fs .write_uuid = GParted::FS::EXTERNAL ;
}
//Nilfs2 resizing is an online only operation and needs:
// mount, umount, nilfs-resize and linux >= 3.0 with nilfs2 support.
if ( ! Glib::find_program_in_path( "mount" ) .empty() &&
! Glib::find_program_in_path( "umount" ) .empty() &&
! Glib::find_program_in_path( "nilfs-resize" ) .empty() &&
Utils::kernel_supports_fs( "nilfs2" ) &&
Utils::kernel_version_at_least( 3, 0, 0 ) )
{
fs .grow = GParted::FS::EXTERNAL ;
if ( fs .read ) //needed to determine a minimum file system size.
fs .shrink = GParted::FS::EXTERNAL ;
}
fs .copy = GParted::FS::GPARTED ;
fs .move = GParted::FS::GPARTED ;
fs .online_read = FS::GPARTED ;
#ifdef ENABLE_ONLINE_RESIZE
if ( Utils::kernel_version_at_least( 3, 6, 0 ) )
{
fs .online_grow = fs .grow ;
fs .online_shrink = fs .shrink ;
}
#endif
//Minimum FS size is 128M+4K using mkfs.nilfs2 defaults
fs .MIN = 128 * MEBIBYTE + 4 * KIBIBYTE ;
return fs ;
}
void nilfs2::set_used_sectors( Partition & partition )
{
if ( ! Utils::execute_command( "nilfs-tune -l " + partition .get_path(), output, error, true ) )
{
//File system size in bytes
Glib::ustring::size_type index = output .find( "Device size:" ) ;
if ( index == Glib::ustring::npos
|| sscanf( output.substr( index ) .c_str(), "Device size: %Ld", &T ) != 1
)
T = -1 ;
//Free space in blocks
index = output .find( "Free blocks count:" ) ;
if ( index == Glib::ustring::npos
|| sscanf( output.substr( index ) .c_str(), "Free blocks count: %Ld", &N ) != 1
)
N = -1 ;
index = output .find( "Block size:" ) ;
if ( index == Glib::ustring::npos
|| sscanf( output.substr( index ) .c_str(), "Block size: %Ld", &S ) != 1
)
S = -1 ;
if ( T > -1 && N > -1 && S > -1 )
{
T = Utils::round( T / double(partition .sector_size) ) ;
N = Utils::round( N * ( S / double(partition .sector_size) ) ) ;
partition .set_sector_usage( T, N ) ;
}
}
else
{
if ( ! output .empty() )
partition .messages .push_back( output ) ;
if ( ! error .empty() )
partition .messages .push_back( error ) ;
}
}
void nilfs2::read_label( Partition & partition )
{
if ( ! Utils::execute_command( "nilfs-tune -l " + partition .get_path(), output, error, true ) )
{
Glib::ustring label = Utils::regexp_label( output, "^Filesystem volume name:[\t ]*(.*)$" ) ;
if ( label != "(none)" )
Make GParted recognise reading blank file system labels (#685656) GParted doesn't notice when a file system label is changed to blank. GParted first calls the file system specific read_label() method. When the label is blank read_label() correctly sets partition.label to the zero length string. Second GParted_Core::set_device_partitions() treats the zero length string to mean that the label is unset and calls FS_Info::get_label() to retrieve it from the cache of blkid output. Blkid also doesn't notice when the file system label has been changed to blank so reports the previous label. Hence GParted displays the previous file system label. Fix by making label a private member variable of the class Partition and providing access methods set_label(), get_label() and label_known() which track whether the label has been set or not. This only fixes the fault for file systems which use file system specific commands to read the label and when these tools are installed. Otherwise GParted uses, or has to fall back on using, the buggy blkid command to read the file system label. NOTE: Many of the file system specific read_label() methods use a tool which outputs more than just the label and use Utils::regexp_label() to match leading text and the label itself. If the surrounding text changes or disappears altogether to indicated a blank label, regexp_label() doesn't match anything and returns the zero length string. This is exactly what is required and is passed to set_label() to set the label to blank. Bug 685656 - GParted doesn't notice when file system label is changed to blank
2012-10-08 07:23:17 -06:00
partition .set_label( label ) ;
else
partition .set_label( "" ) ;
}
else
{
if ( ! output .empty() )
partition .messages .push_back( output ) ;
if ( ! error .empty() )
partition .messages .push_back( error ) ;
}
}
bool nilfs2::write_label( const Partition & partition, OperationDetail & operationdetail )
{
Make GParted recognise reading blank file system labels (#685656) GParted doesn't notice when a file system label is changed to blank. GParted first calls the file system specific read_label() method. When the label is blank read_label() correctly sets partition.label to the zero length string. Second GParted_Core::set_device_partitions() treats the zero length string to mean that the label is unset and calls FS_Info::get_label() to retrieve it from the cache of blkid output. Blkid also doesn't notice when the file system label has been changed to blank so reports the previous label. Hence GParted displays the previous file system label. Fix by making label a private member variable of the class Partition and providing access methods set_label(), get_label() and label_known() which track whether the label has been set or not. This only fixes the fault for file systems which use file system specific commands to read the label and when these tools are installed. Otherwise GParted uses, or has to fall back on using, the buggy blkid command to read the file system label. NOTE: Many of the file system specific read_label() methods use a tool which outputs more than just the label and use Utils::regexp_label() to match leading text and the label itself. If the surrounding text changes or disappears altogether to indicated a blank label, regexp_label() doesn't match anything and returns the zero length string. This is exactly what is required and is passed to set_label() to set the label to blank. Bug 685656 - GParted doesn't notice when file system label is changed to blank
2012-10-08 07:23:17 -06:00
return ! execute_command( "nilfs-tune -L \"" + partition .get_label() + "\" " + partition .get_path(), operationdetail ) ;
}
void nilfs2::read_uuid( Partition & partition )
{
if ( ! Utils::execute_command( "nilfs-tune -l " + partition .get_path(), output, error, true ) )
{
partition .uuid = Utils::regexp_label( output, "^Filesystem UUID:[[:blank:]]*(" RFC4122_NONE_NIL_UUID_REGEXP ")" ) ;
}
else
{
if ( ! output .empty() )
partition .messages .push_back( output ) ;
if ( ! error .empty() )
partition .messages .push_back( error ) ;
}
}
bool nilfs2::write_uuid( const Partition & partition, OperationDetail & operationdetail )
{
return ! execute_command( "nilfs-tune -U " + Utils::generate_uuid() + " " + partition .get_path(), operationdetail ) ;
}
bool nilfs2::create( const Partition & new_partition, OperationDetail & operationdetail )
{
Make GParted recognise reading blank file system labels (#685656) GParted doesn't notice when a file system label is changed to blank. GParted first calls the file system specific read_label() method. When the label is blank read_label() correctly sets partition.label to the zero length string. Second GParted_Core::set_device_partitions() treats the zero length string to mean that the label is unset and calls FS_Info::get_label() to retrieve it from the cache of blkid output. Blkid also doesn't notice when the file system label has been changed to blank so reports the previous label. Hence GParted displays the previous file system label. Fix by making label a private member variable of the class Partition and providing access methods set_label(), get_label() and label_known() which track whether the label has been set or not. This only fixes the fault for file systems which use file system specific commands to read the label and when these tools are installed. Otherwise GParted uses, or has to fall back on using, the buggy blkid command to read the file system label. NOTE: Many of the file system specific read_label() methods use a tool which outputs more than just the label and use Utils::regexp_label() to match leading text and the label itself. If the surrounding text changes or disappears altogether to indicated a blank label, regexp_label() doesn't match anything and returns the zero length string. This is exactly what is required and is passed to set_label() to set the label to blank. Bug 685656 - GParted doesn't notice when file system label is changed to blank
2012-10-08 07:23:17 -06:00
return ! execute_command( "mkfs.nilfs2 -L \"" + new_partition .get_label() + "\" " + new_partition .get_path(), operationdetail ) ;
}
bool nilfs2::resize( const Partition & partition_new, OperationDetail & operationdetail, bool fill_partition )
{
bool success = true ;
Glib::ustring mount_point ;
if ( ! partition_new .busy )
{
mount_point = mk_temp_dir( "", operationdetail ) ;
if ( mount_point .empty() )
return false ;
success &= ! execute_command( "mount -v -t nilfs2 " + partition_new .get_path() + " " + mount_point,
operationdetail, true ) ;
}
if ( success )
{
Glib::ustring cmd = "nilfs-resize -v -y " + partition_new .get_path() ;
if ( ! fill_partition )
{
Glib::ustring size = Utils::num_to_str( floor( Utils::sector_to_unit(
partition_new .get_sector_length(), partition_new .sector_size, UNIT_KIB ) ) ) + "K" ;
cmd += " " + size ;
}
success &= ! execute_command( cmd, operationdetail, true ) ;
if ( ! partition_new. busy )
success &= ! execute_command( "umount -v " + mount_point, operationdetail, true ) ;
}
if ( ! partition_new .busy )
rm_temp_dir( mount_point, operationdetail ) ;
return success ;
}
} //GParted