When composing, describing and implementing the operation just need the
code to query and set the Partition object directly containing the file
system, instead of the enclosing encryption mapping to make it work.
The operation details for setting a new UUID on an encrypted ext4 file
system become:
Set a new random UUID on [Encrypted] ext4 file system on /dev/sdb4
+ calibrate /dev/sdb4
+ Set UUID on /dev/mapper/sdb4_crypt to a new, random value
+ tune2fs -U random /dev/mapper/sdb4_crypt
tune2fs 1.41.12 (17-May-2010)
Also note the now documented rule in apply_operation_to_disk() which
says each operation must leave the status of the encryption mapping and
file system as it found it.
Bug 774818 - Implement LUKS read-write actions NOT requiring a
passphrase
Provide and use a single interface for getting the file system string
for display, regardless of whether the partition is encrypted or the
encryption mapping is active or not.
Example return values for get_filesystem_string() for different types
and states of Partition objects:
1) Plain ext4 file system: -> "ext4"
2) Closed encrypted: -> "[Encrypted]"
3) Open encrypted ext4 file system: -> "[Encrypted] ext4"
This simplifies the code in TreeView_Detail::create_row() which sets the
file system type displayed in the main window. The same method will
then also be used when setting the operation description as each
operation is updated to handle encrypted file systems.
Bug 774818 - Implement LUKS read-write actions NOT requiring a
passphrase
The previous commit changed how the code behind the main window
retrieved the file system label for display. This is the relevant
changes in TreeView_Detail::create_row():
+ const Partition & filesystem_ptn = partition.get_filesystem_partition();
...
- Glib::ustring temp_filesystem_label = partition.get_filesystem_label();
+ Glib::ustring temp_filesystem_label = filesystem_ptn.get_filesystem_label();
treerow[treeview_detail_columns.label] = temp_filesystem_label;
In the case of an encrypted file system get_filesystem_label() is now
called on the Partition object directly rather than on the outer
Partition object containing the LUKS encryption.
The code behind the Information dialog always obtained and used the
Partition object directly containing the file system to call
get_filesystem_label() since read-only LUKS support was added.
Therefore the virtualised PartitionLUKS::get_filesystem_label() is no
longer needed, so remove it.
Bug 774818 - Implement LUKS read-write actions NOT requiring a
passphrase
There are multiple cases of code wanting to work with the Partition
object directly containing the file system, regardless of whether it is
within a PartitionLUKS object or not. The code had to do something
similar to this to access it:
const Partition * filesystem_ptn = &partition;
if ( partition.filesystem == FS_LUKS && partition.busy )
filesystem_ptn = &dynamic_cast<const PartitionLUKS *>( &partition )->get_encrypted();
...
// Access Partition object directly containing the file system
filesystem_ptn-> ...
Implement and use virtual accessor get_filesystem_partition() which
allows the code to be simplified like this:
const Partition & filesystem_ptn = partition.get_filesystem_partition();
...
// Access Partition object directly containing the file system
filesystem_ptn. ...
Bug 774818 - Implement LUKS read-write actions NOT requiring a
passphrase
It made the code look a little messy, is easily resolved in the build
system and made the dependencies more complicated than needed. Each
GParted header was tracked via multiple different names (different
numbers of "../include/" prefixes). For example just looking at how
DialogFeatures.o depends on Utils.h:
$ cd src
$ make DialogFeatures.o
$ egrep ' [^ ]*Utils.h' .deps/DialogFeatures.Po
../include/DialogFeatures.h ../include/../include/Utils.h \
../include/../include/../include/../include/../include/../include/Utils.h \
../include/../include/../include/Utils.h \
After removing "../include/" from the GParted header #includes, just
need to add "-I../include" to the compile command via the AM_CPPFLAGS in
src/Makefile.am. Now the dependencies on GParted header files are
tracked under a single name (with a single "../include/" prefix). Now
DialogFeatures.o only depends on a single name to Utils.h:
$ make DialogFeatures.o
$ egrep ' [^ ]*Utils.h' .deps/DialogFeatures.Po
../include/DialogFeatures.h ../include/Utils.h ../include/i18n.h \
To reflect that there is now only a single path in the Partition object
now. Also get rid of the now unneeded optional clear_paths parameter
which was only relevant when there was a vector of paths.
Bug 767842 - File system usage missing when tools report alternate block
device names
Change from a vector of paths to a single path member in the Partition
object. Remove add_paths() and get_paths() methods. Keep add_path()
and get_path().
Bug 767842 - File system usage missing when tools report alternate block
device names
Record the file system block size in the Partition object. Only
implemented for file systems when set_used_sectors() method has already
parsed the value or can easily parse the value from the existing
executed command(s).
Needed for ext2/3/4 copies and moves performed using e2image so that
they can be tracked in bytes by the ProgressBar class as e2image reports
progress in file system block size units.
Bug 760709 - Add progress bars to XFS and EXT2/3/4 file system specific
copy methods
At the moment any messages for an encrypted file system aren't shown,
only messages from the outer PartitionLUKS object are shown. Also in
Win_GParted::activate_paste() the selected Partition object, possibly
a derived PartitionLUKS, is cloned and the messages cleared.
Therefore a set of accessor methods must be provided to query and modify
partition messages. Messages will be stored in the Partition object to
which they are added and retrieved from all. So in the case of a
derived PartitionLUKS they will be retrieved from the messages vector of
the PartitionLUKS object itself and the messages vector for the
encrypted file system it contains.
To replace code like this in GParted_Core:
partition_temp->messages = messages;
We might naturally provide a set_messages() method which assigns the
messages vector and is used like this:
partition_temp->set_messages( messages );
However on a PartitionLUKS object what should set_messages() do? By the
name it will replace any existing messages in the PartitionLUKS object
itself, but what should happen to the messages for the contained
encrypted Partition object? Should they be cleared or left alone?
Rather than implement set_messages() with unclear semantics implement
append_messages(), which in the PartitionLUKS object case will clearly
leave any messages for the contained encrypted Partition object alone.
Append_messages() is then used to add messages as the Partition or
PartitionLUKS objects when populating the data in GParted_Core.
Bug 760080 - Implement read-only LUKS support
There is already the set of methods in the Partition class to report the
file system usage. Virtualise them and provide PartitionLUKS specific
implementations to calculate the usage of a file system wrapped in LUKS
encryption.
See the ascii art and comment in PartitionLUKS.cc for the details of
those calculations.
Bug 760080 - Implement read-only LUKS support
LUKS headers don't provide any concept of label. Also there is already
the method Partition::get_filesystem_label() for getting the *file
system* label, so virtualise it and provide an appropriate
implementation to get the label of an encrypted file system represented
within a derived PartitionLUKS object. This causes the label to be
displayed correctly in the main window.
It also happens to display the encrypted file system label in the
Information dialog for a LUKS formatted partition. However the whole
Information dialog will be addressed differently in a following commit.
Bug 760080 - Implement read-only LUKS support
Partition object represents a region of a disk and the file system
within. GParted always displays the colour base of the type of the file
system. Therefore remove the color member and always look it up from
the type of the file system as needed.
This makes one less member that will need virtual accessor methods with
different handling in the derived PartitionLUKS class.
Bug 760080 - Implement read-only LUKS support
History:
1) The constructor was added by commit:
6d8b169e73
2006-03-14 21:37:47
changed the way devices and partitions store their devicepaths. Instead of
2) Removed from most of the file system specific ::Copy() methods by
commit:
ad9f2126e7
2006-03-19 15:30:20
fixed issues with copying (see also #335004) cleanups + added FIXME added
3) Removed from GParted_Core::copy() method by commit:
7bb7e8a84f
2006-05-23 22:17:34
Use ped_device_read and ped_device_write instead of 'dd' to copy
4) Finally removed from the last place in xfs::Copy() method by commit:
e414b71b73
2012-01-11 19:49:13
Update xfs resize and copy to use new helper functions
The Partition(path) constructor is no longer used. Remove.
Final step for full polymorphic handling of Partition objects is to
implement a virtual copy constructor. C++ doesn't directly support
virtual copy constructors, so instead use the virtual copy constructor
idiom [1]. (Just a virtual method called clone() which is implemented
in every polymorphic class and creates a clone of the current object and
returns a pointer to it).
Then replace all calls to the (monomorphic) Partition object copy
constructor throughout the code, except in the clone() implementation
itself, with calls to the new virtual clone() method "virtual copy
constructor".
Also have to make the Partition destructor virtual too [2][3] so that
the derived class destructor is called when deleting using a base class
pointer. C++ supports this directly.
[1] Wikibooks: More C++ Idioms / Virtual Constructor
https://en.wikibooks.org/wiki/More_C%2B%2B_Idioms/Virtual_Constructor
[2] When to use virtual destructors?
http://stackoverflow.com/questions/461203/when-to-use-virtual-destructors
[3] Virtuality
Guideline #4: A base class destructor should be either public and
virtual, or protected and nonvirtual
http://www.gotw.ca/publications/mill18.htm
Bug 759726 - Implement Partition object polymorphism
SQUASH: When first using pointers to Partition and calling delete
Copy assignment of Partition objects is now only performed in a few
places in the Operation and OperationResizeMove classes when updating
the displayed PartitionVector. (From Refresh_Visual() when each
operation is visually applied to the display_partitions vector; the
new_partition from the operation is copy assigned over the top of the
relevant existing partition in the display_partitions vector).
In general polymorphic copy assignment is complicated [1], and is now
unnecessary given the above limited use. All that is needed is a way to
polymorphically replace one Partition object with another in a
PartitionVector.
First, prevent further use of Partition object copy assignment by
providing a private declaration and no implementation, so the compiler
enforces this. Second implement and use PartitionVector method
replace_at() which replaces a pointer to one Partition object with
another at the specified index in the PartitionVector.
[1] The Assignment Operator Revisited
[Section:] Virtual assignment
http://icu-project.org/docs/papers/cpp_report/the_assignment_operator_revisited.html
Bug 759726 - Implement Partition object polymorphism
Just creates PartitionVector class and includes it in partition.h so
that it is built and validated by the compiler. Not used anywhere yet.
Implementation strategy is to create a PartitionLUKS class derived from
the Partition class. This implies polymorphism of Partition objects,
which in C++ requires using pointers and references to objects, and not
using objects directly. (See C++ object slicing). Later this
PartitionVector class will be modified to use pointers to Partition
objects and act as the owner of the pointed to Partition objects.
Bug 759726 - Implement Partition object polymorphism
Need to be able to take different actions in the GParted_Core partition
manipulation methods and in Win_GParted UI methods to deal with
libparted supported partitions or whole disk devices without a partition
table. Add boolean whole_device to the partition object and set
appropriately to allow for this.
Bug 743181 - Add unpartitioned drive read-write support
Embedded devices (Android) use GPT partition names to identify
partitions, instead of file system labels. Add support for viewing and
changing them.
As partition names are used to provide unique identification they are
never copied when copying the contents of one partition to another.
Note that GNU/Linux uses file system labels, UUIDs or device names for
identification during the boot process and afterwards so while partition
names can be used, they are optional and purely for user information.
Bug 741424 - Add support for GPT partition names
This is part of parent bug:
Bug #721455 - Obsolete info in license text on multiple modules
and GNOME Goal:
https://wiki.gnome.org/Initiatives/GnomeGoals/Proposals
* verify all source files to make sure they have a license and a
copyright, and that both are up-to-date
Bug #721565 - License text contains obsolete FSF postal address
Include guards need to be unique within GParted code and all included
library header files.
http://en.wikipedia.org/wiki/Include_guard#Difficulties
Use this model for all include guards:
#ifndef GPARTED_FILE_NAME_H
#define GPARTED_FILE_NAME_H
...
#endif /* GPARTED_FILE_NAME_H */
Closes Bug #539297 - Make include guards unique
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
Now that every call to calc_usage_triple() just passes usage figures
returned by get_sectors_*(), remove those parameters, call
get_sectors_*() internally and rename to get_usage_triple().
For specific partition usage values the right hand border of the
partition graphic in the Information dialog would be displayed as grey
rather than the color assigned to the partition.
Steps to reproduce fault:
Create 1024 MiB partition
# lvm pvcreate /dev/sda12
# lvm vgcreate GParted-VG1 /dev/sda12
View partition information
Fragment from Dialog_Partition_Info::init_drawingarea():
139 else if ( partition .sector_usage_known() )
140 {
141 used = Utils::round( ( 400 - BORDER *2 ) / ( dlength / partition .get_sectors_used() ) ) ;
142 unused = Utils::round( ( 400 - BORDER *2 ) / ( dlength / partition .get_sectors_unused() ) ) ;
143 unallocated = 400 - BORDER *2 - used - unused ;
144 }
For this issue the above values are both exactly x.5 and both round
upwards, resulting in unallocated being -1.
used = round((400 - 8*2)/(2097152.0/8192)) = round(1.5)
unused = round((400 - 8*2)/(2097152.0/2088960)) = round(382.5)
unallocated = 400 - 8*2 - 2 - 383 = -1
The simple fix would be to use floor() instead of round() in the
calculation of either used or unused. The same fix would also need to
be applied in Display_Info() for the calculation of the percentage
figures. Unfortunately this simple fix can lead to odd figures when the
used or unused is close to zero and floor() or ceil() is effectively
applied rather than round(). For example:
Size: 227.23 GiB
Used: 28.00 KiB ( 1% )
Unused: 180.00 GiB ( 79% )
Unallocated: 47.23 GiB ( 20% )
Used figure of 28 KiB in 227 GiB partition should be rounded to 0% but
wasn't.
Write Partition::calc_usage_triple() which calculates the "best" figures
by rounding the smaller two figures and subtracts them from the desired
total for the largest figure. Apply to the calculation of the partition
usage percentage figures in the Information dialog and the partition
usage graphic in the same dialog and the main window.
Bug #499202 - gparted does not see the difference if partition size
differs from filesystem size
Most file systems report intrinsic unallocated space using the statvfs()
system call when mounted, but not using their own tools. They are:
ext2/3/4, fat16/32, hfs, nilfs2, reiserfs and xfs. Showing either a
little or no unallocated space, depending on whether a file system is
mounted or not, could be confusing to the user.
When all file systems are created filling their partitions the unused
figure reported by statvfs() and their own tools are the same or very
close. Also the used plus unallocated figure from statvfs() agrees with
the used figure from their own tools.
For all file systems don't display intrinsic unallocated space (that
below the threshold of 2 to 5%), instead include it as used space. As
soon as the amount of unallocated space becomes significant display it
everywhere and also trigger the warning.
For display purposes always use the new Partition methods:
get_sectors_used(), get_sectors_unused(), and get_sectors_unallocated().
When calculating new usage figures during Paste and Resize/Move
operations directly access sectors_used, sectors_unused and
sectors_unallocated members.
Bug #499202 - gparted does not see the difference if partition size
differs from filesystem size
A number of file systems report intrinsic unallocated space even when
they are created filling the partition. As reported using their own
specific tools, they are: jfs, lvm2 pv and ntfs. Therefore when
resizing a partition estimate its minimum size to be used sectors plus
any unallocated sectors up to the significant amount.
Bug #499202 - gparted does not see the difference if partition size
differs from filesystem size
When pasting a copied partition into free space or move/resizing a
partition set its space utilisation so that any unallocated space within
the partition is displayed correctly before the operation is applied.
NOTE:
If the file system does not support file system resizing the Paste and
Move/Resize dialogs don't allow resizing the partition so the preview
will always be correct, unlike the case in the previous patch:
Set unallocated space when performing simple operations (#499202)
Also remove the deprecated and no longer used Partition::Set_Unused()
and Partition::set_used() methods.
Bug #499202 - gparted does not see the difference if partition size
differs from filesystem size
Currently GParted assumes that a file system fills its containing
partition. This is not always true and can occur when resizing is
performed outside of GParted or a resize operation fails. GParted
doesn't display any information about unallocated space to the user
and in most cases it is simply included in used space.
Add partition unallocated space accounting. Make GParted record the
unallocated space for mounted file system and display a warning in the
Partition Information dialog when too much unallocated space is found.
Partition::set_sector_usage( fs_size, fs_unused ), is the new preferred
method of recording file system usage because it allows the unallocated
space in a partition to be calculated. Partition::Set_Unused() and
Partition::set_used() are now deprecated.
NOTES:
1) Set the minimum unallocated space to be 5% before considering it
significant to avoid false reporting. Worst case found was a
mounted xfs file system in a 100MiB partition, which reports as
~4.7% unallocated according to file system size from statvfs().
However, it reports as having no unallocated space using xfs
specific tools.
2) Unallocated space is only a graphical representation for the user.
GParted must still use relevant tools to resize file systems before
shrinking the data and can't assume all unallocated space exists
after the file system at the end of the partition.
Bug #499202 - gparted does not see the difference if partition size
differs from filesystem size
As the Mount Point column is being borrowed to display the PV's VGNAME,
also suppress generation of the "Mount on" submenu for LVM2 PVs.
Bug #160787 - lvm support
Make align to MiB the default setting instead of align to cylinder.
Migrate logic for alignment to cylinder into its own method
snap_to_cylinder, and place common logic in snap_to_alignment.
Add alignment checks for situations where space is needed for Master
Boot Record or Extended Boot Record.
Adjust ranges on spin buttons according to required boot record space.
Copy fix for off by one sector (#596552) from
Dialog_Partition_New::Get_New_Partition to
Dialog_Base_Partition::Get_New_Partition
Enhance resize / move logic for checking locations of nearby logical
partitions to not depend on the partition ordering.
Note: This commit does not include limiting graphic movement according
to required boot record space.
Also add signal handler to alignment menu to update file system
minimum size.
This enhancement is to prepare for adding a third alignment
option to align to MiB.
The device sector size is needed in all calculations that convert
between sectors and bytes. The device sector_size is included in
the partition object because this object is used to contain
operation information in addition to actual partitions and
unallocated space. A second option was considered to pass the
device object to many methods, but this was considered a much
larger task that might not provide significant gains in
maintainability.
Restore copyright entries by original author to those of his last
known repository commit titled "released gparted-0.3.4 on
LarryT's request." on Feb 25, 2007.
Add my own copyright entries for files in which I changed source
code. Files in which I only made spelling changes do not have my
copyright entry added.
* added support for reading volumelabels. Atm we only read ext2/3, but
the infrastructure for adding the other filesystems is in place.
It's simply a matter of finding the right commands and parsing the
output. (see #338528 for more info)
* include/Partition.h,
src/Partition.cc: added test_overlap()
* include/GParted_Core.h,
src/GParted_Core.cc: perform a readonly testrun before the actual
move if destination overlaps source.
* improved errorhandling a bit. At the initialscan we store
errors/warnings now in a list per partition and show the in the
partitioninfo dialog.
While executing an operation we collect all libparted exceptions in
a list and attach this list to the operationdetails when everything
is done.
* include/Partition.h,
src/Partition.cc: added set_used() and operator!=
* src/Dialog_Partition_Copy.cc,
src/GParted_Core.cc,
src/OperationCopy.cc,
src/Win_GParted.cc: it's now possible to copy from partition to
partition. (before this it was only possible to copy to unallocated
space)
* include/DrawingAreaVisualDisk.h,
src/DrawingAreaVisualDisk.cc: another change to highlighting of
selected partition.
* include/Partition.h,
src/Win_GParted.cc: deal properly with just formatted partitions
* src/Operation.cc: added FIXME
* changed the way devices and partitions store their devicepaths.
Instead of holding a 'realpath' and a symbolic path we store paths
in a list. This allows for improved detection of mountpoins, free
space, etc..
Also fixed a nasty bug which showed up when you copy a partition
from one device to another. (thanks to mario for the report)
Mike Fleetwood