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Add and use Partition::set_unpartitioned() method (#788308)

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PATCHSET OVERVIEW:

When unpartitioned drive read-write support was added this commit added
a whole_device flag:
   5098744f9a
   Add whole_device flag to the partition object (#743181)

Using a whole_device flags now seems not the correct way to model
unpartitioned drives.  GParted models an uninitialised drive as:
    .path         = _("uninitialized")
    .type         = TYPE_UNALLOCATED
    .whole_device = true
    .filesystem   = FS_UNALLOCATED
and a whole drive file system, using ext4 for example, as:
    .path         = "/dev/sdb"
    .type         = TYPE_PRIMARY
    .whole_device = true
    .filesystem   = FS_EXT4
No partitioning changed yet the type of the partition in the model
changed between TYPE_UNALLOCATED and TYPE_PRIMARY depending on whether
the whole drive contains a recognised file system or not.

The partition object describing a file system within a LUKS encryption
mapping is another case of the model not matching reality.
    .path         = /dev/mapper/crypt_sdb1_crypt
    .type         = TYPE_PRIMARY
    .whole_device = true
    .filesystem   = FS_EXT4
There is no partition table within the encryption mapping, the file
system fills it, but GParted records it as a primary partition.

Make TYPE_UNALLOCATED and TYPE_PRIMARY be reserved for representing
unallocated space and primary partitions within a partitioned disk drive
and introduce new TYPE_UNPARTITIONED for all cases of an unpartitioned
whole disk drive.

The GParted UI does differentiate between an unallocated whole disk
device and anything else by requiring a partition table to be created
first, even if that is just the loop partition table.  That
determination can simply look for the partition object containing file
system type FS_UNALLOCATED instead.

THIS PATCH:

Create set_unpartitioned() helper method to set a partition object to
represent a whole disk drive and use everywhere such an object is
modelled.  This matches what existing methods Set_Unallocated() and
indeed Set() do for unallocated space and any type of partition
respectively.

For now the partition type is still set to either TYPE_UNALLOCATED or
TYPE_PRIMARY so the rest of the code base remains the same.
TYPE_UNPARTITIONED will be introduced later.

Bug 788308 - Remove whole_device partition flag
This commit is contained in:
Mike Fleetwood 2016-08-13 13:28:58 +01:00 committed by Curtis Gedak
parent 70df61b92c
commit 400864a65e
5 changed files with 79 additions and 55 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

6
include/Partition.h
View file

@ -98,6 +98,12 @@ public:
Sector sector_end,
Byte_Value sector_size,
bool inside_extended );
void set_unpartitioned( const Glib::ustring & device_path,
const Glib::ustring & partition_path,
FILESYSTEM fstype,
Sector length,
Byte_Value sector_size,
bool busy );
//update partition number (used when a logical partition is deleted)
void Update_Number( int new_number );

58
src/GParted_Core.cc
View file

@ -707,12 +707,12 @@ bool GParted_Core::set_disklabel( const Device & device, const Glib::ustring & d
// preference to any partition table about to be written.
OperationDetail dummy_od;
Partition temp_partition;
temp_partition.Set_Unallocated( device_path,
true,
0LL,
device.length - 1LL,
device.sector_size,
false );
temp_partition.set_unpartitioned( device_path,
"",
FS_UNALLOCATED,
device.length,
device.sector_size,
false );
erase_filesystem_signatures( temp_partition, dummy_od );
return new_disklabel( device_path, disklabel );
@ -953,17 +953,12 @@ void GParted_Core::set_device_from_disk( Device & device, const Glib::ustring &
// Create virtual partition covering the whole disk device
// with unknown contents.
Partition * partition_temp = new Partition();
partition_temp->Set( device.get_path(),
lp_device->path,
1,
TYPE_PRIMARY,
true,
FS_UNKNOWN,
0LL,
device.length - 1LL,
device.sector_size,
false,
false );
partition_temp->set_unpartitioned( device.get_path(),
lp_device->path,
FS_UNKNOWN,
device.length,
device.sector_size,
false );
// Place unknown file system message in this partition.
partition_temp->append_messages( messages );
device.partitions.push_back_adopt( partition_temp );
@ -980,12 +975,12 @@ void GParted_Core::set_device_from_disk( Device & device, const Glib::ustring &
device.max_prims = 1;
Partition * partition_temp = new Partition();
partition_temp->Set_Unallocated( device.get_path(),
true,
0LL,
device.length - 1LL,
device.sector_size,
false );
partition_temp->set_unpartitioned( device.get_path(),
"", // Overridden with "unallocated"
FS_UNALLOCATED,
device.length,
device.sector_size,
false );
// Place libparted messages in this unallocated partition
partition_temp->append_messages( libparted_messages );
libparted_messages.clear();
@ -1210,17 +1205,12 @@ void GParted_Core::set_device_one_partition( Device & device, PedDevice * lp_dev
partition_temp = new PartitionLUKS();
else
partition_temp = new Partition();
partition_temp->Set( device.get_path(),
path,
1,
TYPE_PRIMARY,
true,
fstype,
0LL,
device.length - 1LL,
device.sector_size,
false,
partition_is_busy );
partition_temp->set_unpartitioned( device.get_path(),
path,
fstype,
device.length,
device.sector_size,
partition_is_busy );
partition_temp->append_messages( messages );

12
src/OperationFormat.cc
View file

@ -52,12 +52,12 @@ void OperationFormat::apply_to_visual( PartitionVector & partitions )
partitions.clear();
Partition * temp_partition = new Partition();
temp_partition->Set_Unallocated( device.get_path(),
true,
0LL,
device.length -1LL,
device.sector_size,
false );
temp_partition->set_unpartitioned( device.get_path(),
"", // Overridden with "unallocated"
FS_UNALLOCATED,
device.length,
device.sector_size,
false );
partitions.push_back_adopt( temp_partition );
}
else

33
src/Partition.cc
View file

@ -201,6 +201,39 @@ void Partition::Set_Unallocated( const Glib::ustring & device_path,
status = GParted::STAT_REAL ;
}
void Partition::set_unpartitioned( const Glib::ustring & device_path,
const Glib::ustring & partition_path,
FILESYSTEM fstype,
Sector length,
Byte_Value sector_size,
bool busy )
{
Reset();
Set( device_path,
// The path from the parent Device object and this child Partition object
// spanning the whole device would appear to be the same. However the former
// may have come from the command line and the later is the canonicalised
// name returned from libparted. (See GParted_Core::set_device_from_disk()
// "loop" table and GParted_Core::set_device_one_partition() calls to
// set_unpartitioned()). Therefore they can be different.
//
// For unrecognised whole disk device partitions use "unallocated" as the
// partition path to match what Set_Unallocated() does when it created such
// whole disk device partitions.
( fstype == FS_UNALLOCATED ) ? Utils::get_filesystem_string( FS_UNALLOCATED )
: partition_path,
1,
// FIXME: Replace with TYPE_UNPARTITIONED when whole_device member is removed
( fstype == FS_UNALLOCATED ) ? TYPE_UNALLOCATED : TYPE_PRIMARY,
true,
fstype,
0LL,
length - 1LL,
sector_size,
false,
busy );
}
void Partition::Update_Number( int new_number )
{
unsigned int index = path.rfind( Utils::num_to_str( partition_number ) );

25
src/PartitionLUKS.cc
View file

@ -65,10 +65,10 @@ Partition * PartitionLUKS::clone_as_plain() const
return plain_ptn;
}
// Mostly a convenience method calling Partition::Set() on the encrypted Partition but
// also sets private header_size. Makes encrypted Partition object look like a whole disk
// device as /dev/mapper/CRYPTNAME contains no partition table and the file system starts
// from sector 0 going to the very end.
// Mostly a convenience method calling Partition::set_unpartitioned() on the encrypted
// Partition but also sets private header_size. Makes encrypted Partition object look
// like a whole disk device as /dev/mapper/CRYPTNAME contains no partition table and the
// file system starts from sector 0 going to the very end.
void PartitionLUKS::set_luks( const Glib::ustring & path,
FILESYSTEM fstype,
Sector header_size,
@ -76,17 +76,12 @@ void PartitionLUKS::set_luks( const Glib::ustring & path,
Byte_Value sector_size,
bool busy )
{
encrypted.Set( path,
path,
1,
TYPE_PRIMARY,
true,
fstype,
0LL,
mapping_size - 1LL,
sector_size,
false,
busy );
encrypted.set_unpartitioned( path,
path,
fstype,
mapping_size,
sector_size,
busy );
this->header_size = header_size;
}