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Use e2image to move/copy ext[234] file systems (#721516) 

Use e2image features added in e2fsprogs 1.42.9 to move/copy
an ext[234] file system more efficiently by skipping unused blocks.
Fall back to the internal copy algorithm if e2image is not found
or does not support move/copy.

Bug #721516 - Use e2image to move/copy ext[234] filesystems
This commit is contained in:
Phillip Susi 2014-01-05 00:32:54 -05:00 committed by Mike Fleetwood
parent eae15d8887
commit 86111fe12a
2 changed files with 43 additions and 4 deletions
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6
include/ext2.h
View File

@ -38,6 +38,12 @@ public:
bool create( const Partition & new_partition, OperationDetail & operationdetail ) ;
bool resize( const Partition & partition_new, OperationDetail & operationdetail, bool fill_partition = false ) ;
bool check_repair( const Partition & partition, OperationDetail & operationdetail ) ;
bool move( const Partition & partition_new,
const Partition & partition_old,
OperationDetail & operationdetail );
bool copy( const Partition & partition_new,
Partition & partition_old,
OperationDetail & operationdetail );
};
} //GParted

41
src/ext2.cc
View File

@ -60,8 +60,18 @@ FS ext2::get_filesystem_support()
if ( fs .check )
{
fs .copy = FS::GPARTED ;
fs .move = FS::GPARTED ;
fs.copy = fs.move = FS::GPARTED ;
//If supported, use e2image to copy/move the file system as it
// only copies used blocks, skipping unused blocks. This is more
// efficient than copying all blocks used by GParted's internal
// method.
if ( ! Glib::find_program_in_path( "e2image" ) .empty() )
{
Utils::execute_command( "e2image", output, error, true ) ;
if ( Utils::regexp_label( error, "(-o src_offset)" ) == "-o src_offset" )
fs.copy = fs.move = FS::EXTERNAL ;
}
}
fs .online_read = FS::EXTERNAL ;
@ -205,6 +215,29 @@ bool ext2::check_repair( const Partition & partition, OperationDetail & operatio
return ( exit_status == 0 || exit_status == 1 || exit_status == 2 || exit_status == 256 ) ;
}
bool ext2::move( const Partition & partition_new,
const Partition & partition_old,
OperationDetail & operationdetail )
{
Sector distance;
Glib::ustring offset;
distance = partition_old.sector_start - partition_new.sector_start;
offset = Utils::num_to_str( llabs(distance) * partition_new.sector_size );
if ( distance < 0 )
return ! execute_command( "e2image -ra -p -o " + offset + " " + partition_new.get_path(),
operationdetail, true, true );
else
return ! execute_command( "e2image -ra -p -O " + offset + " " + partition_new.get_path(),
operationdetail, true, true );
}
bool ext2::copy( const Partition & src_part,
Partition & dest_part,
OperationDetail & operationdetail )
{
return ! execute_command( "e2image -ra -p " + src_part.get_path() + " " + dest_part.get_path(),
operationdetail, true, true );
}
} //GParted