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Enhanced copy/paste checks when MBR/EBR involved.
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@ -1,3 +1,9 @@
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2009-01-24 Curtis Gedak <gedakc@gmail.com>
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* src/Dialog_Partition_Copy.cc,
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src/Win_GParted.cc: Enhanced copy/paste checks when MBR/EBR involved.
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- Related to GParted bug #567402
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2009-01-20 Curtis Gedak <gedakc@gmail.com>
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* doc/gparted.8: Updated manual page.
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@ -1,4 +1,4 @@
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/* Copyright (C) 2004, 2005, 2006, 2007, 2008 Bart Hakvoort
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/* Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 Bart Hakvoort
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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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@ -44,26 +44,50 @@ void Dialog_Partition_Copy::Set_Data( const Partition & selected_partition, cons
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MB_PER_PIXEL = TOTAL_MB / 500.00 ;
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long COPIED_LENGTH_MB = Utils::round( Utils::sector_to_unit( copied_partition .get_length(), GParted::UNIT_MIB ) ) ;
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//Adjust for situation when an MSDOS partition table is in
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// use and a primary partition is copied and pasted into
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// an unallocated space in an extended partition.
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// /* Copy Primary not at start of disk to within Extended partition */
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// Adjust when a primary partition is copied and pasted
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// into an unallocated space in an extended partition
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// of an MSDOS partition table.
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// Since the Extended Boot Record requires an additional track,
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// we need to add this to the destination (selected) partition.
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// Because GUI selection of partition size is in MB and we round
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// to the cylinder size, we will increase the partition by an
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// additional 8 MB. 8 MB is typical cylinder size with
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// todays larger disks.
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// 8 MB = (255 heads) * (63 sectors) * (512 bytes)
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// this must be considered in the required space for the
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// destination (selected) partition.
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// NOTE: This problem does not occur for a primary partition
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// at the the start of the disk because the size of the EBR and
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// Master Boot Record are the same.
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//
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// /* Copy Primary not at start of disk to Primary at start of disk */
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// Also Adjust when a primary partition that does not start at the
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// beginning of the disk is copied and pasted
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// into an unallocated space at the start of the disk device.
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// Since the Master Boot Record requires an additional track,
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// this must be considered in the required space for the
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// destination (selected) partition.
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//
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// Because the largest unit used in the GUI is one
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// cylinder size (round to cylinders), the space
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// needed in the destination partition needs to be increased
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// by enough to round up one cylinder size.
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// Increase by half a cylinder size (or 4 MB) because this
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// will round up to the next cylinder size.
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// 8 MB is typical cylinder size with todays larger disks.
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// 8 MB = (255 heads) * (63 sectors) * (512 bytes)
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//
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//FIXME: Should confirm MSDOS partition table type, track sector size, and use cylinder size from device
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if ( copied_partition .type == TYPE_PRIMARY
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&& copied_partition .sector_start != 63
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&& selected_partition .type == TYPE_UNALLOCATED
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&& selected_partition .inside_extended
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if ( (/* Copy Primary not at start of disk to within Extended partition */
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copied_partition .type == TYPE_PRIMARY
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&& copied_partition .sector_start > 63
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&& selected_partition .type == TYPE_UNALLOCATED
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&& selected_partition .inside_extended
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)
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|| ( /* Copy Primary not at start of disk to Primary at start of disk */
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copied_partition .type == TYPE_PRIMARY
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&& copied_partition .sector_start > 63
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&& selected_partition .type == TYPE_UNALLOCATED
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&& selected_partition .sector_start <=63 /* Beginning of disk device */
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&& ! selected_partition .inside_extended
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)
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)
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COPIED_LENGTH_MB += 8 ;
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COPIED_LENGTH_MB += 4 ;
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//now calculate proportional length of partition
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frame_resizer_base ->set_x_start( 0 ) ;
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@ -82,7 +106,7 @@ void Dialog_Partition_Copy::Set_Data( const Partition & selected_partition, cons
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if ( fs .filesystem == GParted::FS_XFS ) //bit hackisch, but most effective, since it's a unique situation
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fs .MIN = copied_partition .sectors_used + (BUF * 2) ;
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else
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fs .MIN = (COPIED_LENGTH_MB +1) * MEBIBYTE ;
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fs .MIN = COPIED_LENGTH_MB * MEBIBYTE ;
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GRIP = true ;
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//set values of spinbutton_before
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@ -836,7 +836,48 @@ void Win_GParted::set_valid_operations()
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else
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required_size = copied_partition .get_length() ;
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if ( ( required_size + devices[ current_device ] .cylsize ) <= selected_partition .get_length() )
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// /* Copy Primary not at start of disk to within Extended partition */
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// Adjust when a primary partition is copied and pasted
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// into an unallocated space in an extended partition
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// of an MSDOS partition table.
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// Since the Extended Boot Record requires an additional track,
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// this must be considered in the required space for the
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// destination (selected) partition.
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// NOTE: This problem does not occur for a primary partition
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// at the the start of the disk because the size of the EBR and
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// Master Boot Record are the same.
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//
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// /* Copy Primary not at start of disk to Primary at start of disk */
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// Also Adjust when a primary partition that does not start at the
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// beginning of the disk is copied and pasted
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// into an unallocated space at the start of the disk device.
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// Since the Master Boot Record requires an additional track,
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// this must be considered in the required space for the
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// destination (selected) partition.
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//
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// Because the largest unit used in the GUI is one
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// cylinder size (round to cylinders), the space
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// needed in the destination partition needs to be increased
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// by one cylinder size.
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if ( (/* Copy Primary not at start of disk to within Extended partition */
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copied_partition .type == TYPE_PRIMARY
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&& copied_partition .sector_start > devices[ current_device ] .sectors /* 63 for MSDOS Partition Table */
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&& devices[ current_device ] .disktype == "msdos"
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&& selected_partition .type == TYPE_UNALLOCATED
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&& selected_partition .inside_extended
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)
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|| ( /* Copy Primary not at start of disk to Primary at start of disk */
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copied_partition .type == TYPE_PRIMARY
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&& copied_partition .sector_start > devices[ current_device ] .sectors /* 63 for MSDOS Partition Table */
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&& devices[ current_device ] .disktype == "msdos"
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&& selected_partition .type == TYPE_UNALLOCATED
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&& selected_partition .sector_start <= devices[ current_device ] .sectors /* Beginning of disk device */
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&& ! selected_partition .inside_extended
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)
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)
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required_size += devices[ current_device ] .cylsize ;
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if ( required_size <= selected_partition .get_length() )
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allow_paste( true ) ;
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}
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