Created 2 files to support ext4 operations.

Support for ext4 is planned for version 2.6.28 of the Linux kernel.

svn path=/trunk/; revision=1004

AUTHORS

@@ -12,10 +12,11 @@ not an invitation to misrepresent who contributed to GNU GParted.
 We need to keep track of copyright (see the Maintainer HOWTO on www.gnu.org).
 
 Curtis Gedak		<gedakc@users.sourceforge.net>
+	* Created ext4.h, ext4.cc to support ext4 file systems
 	* Created FS_Info.h, FS_Info.cc
 	* Rewrote read_label functionality for hfs
 	* Wrote create, read_label, and check_repair functionality for hfs+
-	* Wrote read_label functionality for fat16 and fat32 filesystems  
+	* Wrote read_label functionality for fat16 and fat32 file systems  
 	* Wrote following Utils:: methods:
 		regexp_label(), fat_compliant_label(),
 		create_mtoolsrc_file(), delete_mtoolsrc_file,

ChangeLog

@@ -1,5 +1,11 @@
 2008-12-18  Curtis Gedak  <gedakc@gmail.com>
 
+	* include/ext4.h,
+	  include/Makefile.am,
+	  src/ext4.cc,
+	  src/Makefile.am: Created 2 files to support ext4 operations.
+	  - Support for ext4 is planned for version 2.6.28 of the Linux kernel.
+
 	* include/FS_Info.h,
 	  src/FS_Info.cc: Added get_fs_type() method
 

include/Makefile.am

@@ -14,7 +14,7 @@ EXTRA_DIST = \
 	DialogManageFlags.h  		\
 	DrawingAreaVisualDisk.h 	\
 	FileSystem.h  			\
-        Frame_Resizer_Base.h		\
+	Frame_Resizer_Base.h		\
 	Frame_Resizer_Extended.h	\
 	FS_Info.h				\
 	GParted_Core.h    		\
@@ -28,19 +28,20 @@ EXTRA_DIST = \
 	OperationFormat.h		\
 	OperationResizeMove.h		\
 	OperationLabelPartition.h	\
-        Partition.h  			\
+	Partition.h  			\
 	TreeView_Detail.h 		\
 	Utils.h 			\
 	Win_GParted.h 			\
 	ext2.h				\
 	ext3.h  			\
+	ext4.h  			\
 	fat16.h    			\
 	fat32.h  			\
 	hfs.h  				\
 	hfsplus.h 			\
 	i18n.h				\
 	jfs.h 				\
-        linux_swap.h 			\
+	linux_swap.h 			\
 	ntfs.h  			\
 	reiser4.h   			\
 	reiserfs.h  			\

include/ext4.h

@@ -0,0 +1,45 @@
+/* Copyright (C) 2008 Curtis Gedak
+ *
+ *  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 Library General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+ 
+ 
+#ifndef EXT4_H_
+#define EXT4_H_
+
+#include "../include/FileSystem.h"
+
+namespace GParted
+{
+
+class ext4 : public FileSystem
+{
+public:
+	FS get_filesystem_support() ;
+	void set_used_sectors( Partition & partition ) ;
+	void read_label( Partition & partition ) ;
+	bool write_label( const Partition & partition, OperationDetail & operationdetail ) ;
+	bool create( const Partition & new_partition, OperationDetail & operationdetail ) ;
+	bool resize( const Partition & partition_new, OperationDetail & operationdetail, bool fill_partition = false ) ;
+	bool copy( const Glib::ustring & src_part_path,
+		   const Glib::ustring & dest_part_path,
+		   OperationDetail & operationdetail ) ;
+	bool check_repair( const Partition & partition, OperationDetail & operationdetail ) ;
+};
+
+
+} //GParted
+
+#endif /*EXT4_H_*/

src/Makefile.am

@@ -43,6 +43,7 @@ gpartedbin_SOURCES = \
 	Win_GParted.cc			\
 	ext2.cc				\
 	ext3.cc				\
+	ext4.cc				\
 	fat16.cc			\
 	fat32.cc			\
 	hfs.cc				\

src/ext4.cc

@@ -0,0 +1,144 @@
+/* Copyright (C) 2008 Curtis Gedak
+ *
+ *  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 Library General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+ 
+ 
+#include "../include/ext4.h"
+
+namespace GParted
+{
+
+FS ext4::get_filesystem_support()
+{
+	FS fs ;
+	fs .filesystem = GParted::FS_EXT4 ;
+
+	//To be on the safe side, only enable all the function if mkfs.ext4 is
+	//  found indicating that there is a recent copy of e2fsprogs available.
+	if ( ! Glib::find_program_in_path( "mkfs.ext4" ) .empty() )
+	{
+		fs .create = GParted::FS::EXTERNAL ;
+
+		if ( ! Glib::find_program_in_path( "dumpe2fs" ) .empty() )
+			fs .read = GParted::FS::EXTERNAL ;
+	
+		if ( ! Glib::find_program_in_path( "e2label" ) .empty() ) {
+			fs .read_label = FS::EXTERNAL ;
+			fs .write_label = FS::EXTERNAL ;
+		}
+
+		if ( ! Glib::find_program_in_path( "e2fsck" ) .empty() )
+			fs .check = GParted::FS::EXTERNAL ;
+
+		if ( ! Glib::find_program_in_path( "resize2fs" ) .empty() && fs .check )
+		{
+			fs .grow = GParted::FS::EXTERNAL ;
+
+			if ( fs .read ) //needed to determine a min file system size..
+				fs .shrink = GParted::FS::EXTERNAL ;
+		}
+
+		if ( fs .check )
+		{
+			fs .copy = GParted::FS::GPARTED ;
+			fs .move = GParted::FS::GPARTED ;
+		}
+	}
+
+	return fs ;
+}
+
+void ext4::set_used_sectors( Partition & partition ) 
+{
+	if ( ! Utils::execute_command( "dumpe2fs -h " + partition .get_path(), output, error, true ) )
+	{
+		index = output .find( "Free blocks:" ) ;
+		if ( index >= output .length() ||
+		     sscanf( output.substr( index ) .c_str(), "Free blocks: %Ld", &N ) != 1 )   
+			N = -1 ;
+	
+		index = output .find( "Block size:" ) ;
+		if ( index >= output.length() || 
+		     sscanf( output.substr( index ) .c_str(), "Block size: %Ld", &S ) != 1 )  
+			S = -1 ;
+
+		if ( N > -1 && S > -1 )
+			partition .Set_Unused( Utils::round( N * ( S / 512.0 ) ) ) ;
+	}
+	else
+	{
+		if ( ! output .empty() )
+			partition .messages .push_back( output ) ;
+		
+		if ( ! error .empty() )
+			partition .messages .push_back( error ) ;
+	}
+}
+
+void ext4::read_label( Partition & partition )
+{
+	if ( ! Utils::execute_command( "e2label " + partition .get_path(), output, error, true ) )
+	{
+		partition .label = Utils::regexp_label( output, "^(.*)" ) ;
+	}
+	else
+	{
+		if ( ! output .empty() )
+			partition .messages .push_back( output ) ;
+		
+		if ( ! error .empty() )
+			partition .messages .push_back( error ) ;
+	}
+}
+
+bool ext4::write_label( const Partition & partition, OperationDetail & operationdetail )
+{
+	return ! execute_command( "e2label " + partition .get_path() + " \"" + partition .label + "\"", operationdetail ) ;
+}
+
+bool ext4::create( const Partition & new_partition, OperationDetail & operationdetail )
+{
+	return ! execute_command( "mkfs.ext4 -L \"" + new_partition .label + "\" " + new_partition .get_path(), operationdetail ) ;
+}
+
+bool ext4::resize( const Partition & partition_new, OperationDetail & operationdetail, bool fill_partition )
+{
+	Glib::ustring str_temp = "resize2fs " + partition_new .get_path() ;
+	
+	if ( ! fill_partition )
+		str_temp += " " + Utils::num_to_str( Utils::round( Utils::sector_to_unit( 
+					partition_new .get_length(), GParted::UNIT_KIB ) ) -1, true ) + "K" ; 
+		
+	return ! execute_command( str_temp, operationdetail ) ;
+}
+
+bool ext4::copy( const Glib::ustring & src_part_path,
+		 const Glib::ustring & dest_part_path,
+		 OperationDetail & operationdetail )
+{
+	return true ;
+}
+
+bool ext4::check_repair( const Partition & partition, OperationDetail & operationdetail )
+{
+	exit_status = execute_command( "e2fsck -f -y -v " + partition .get_path(), operationdetail ) ;
+
+	//exitstatus 256 isn't documented, but it's returned when the 'FILE SYSTEM IS MODIFIED'
+	//this is quite normal (especially after a copy) so we let the function return true...
+	return ( exit_status == 0 || exit_status == 1 || exit_status == 2 || exit_status == 256 ) ;
+}
+	
+} //GParted