Using the default MiB alignment, creating an MSDOS logical partition
between two other existing logical partitions fails with this error
dialog:
(-) <b>An error occurred while applying the operations</b>
See the details for more information.
<b>IMPORTANT</b>
If you want support, you need to provide the saved details!
See http://gparted.org/save-details.htm for more information.
[ OK ]
and these operation details:
+ libparted messages
- Unable to satisfy all constraints on the partition.
This bug was introduced by this commit included in GParted 0.23.0:
90e3ed68fc
Shallow copy Device object into Operation object (#750168)
The commit message claimed that the deep copied Partition objects inside
the Device inside the Operation object are never accessed. This turned
out not to be true. Win_GParted::Add_Operation() uses them as part of
snap_to_alignment() which updates requested partition boundaries to
account for alignment requirements and the space needed for EBR
(Extended Boot Record) preceding logical partitions.
In this case the new logical partition was trying to be created over the
top of the EBR for the following logical partition because
snap_to_alignment() wasn't aware of its existence.
Fix by making Add_Operation() and snap_to_alignment() refer to the
current device, as displayed in the UI, rather than the shallow copy
included in the Operation object. Hopefully now it is true that the
not copied vector of Partition objects in the Device object in each
Operation object are never accessed.
Bug 779339 - enforce at least 1 MiB "free space following"
The Operation class already provided find_index_extended() method and
was used in the Operation and derived classes where required. It
returns the index to the extended partition in the PartitionVector
object, or -1 when no extended partition exists.
There were several cases of the same functionality being open coded in
GParted_Core and Win_GParted. Therefore move the implementation to
find_extended_partition() in PartitionVector compilation unit and use
this implementation everywhere.
The clear_mountpoints parameter has never been used since
add_mountpoint*() were first added [1][2]. clear_mountpoints() method
[3] is available to provide this functionality and used. Therefore
removed unused parameter and code.
[1] add_mountpoints() added 2006-03-15
9532c3cad1
Made Partition::mountpoints private
[2] add_mountpoint() added 2011-12-16
208083f11d84dbd4f186271a3cdbf5170db259f8b8
Display LVM2 VGNAME as the PV's mount point (#160787)
[3] clear_mountpoint() added 2006-03-19
ad9f2126e7
fixed issues with copying (see also #335004) cleanups + added FIXME added
Now that resizing of encrypted file systems is implemented add growing
of the open LUKS mapping as part of the check repair operation.
Resizing an encrypted file system requires the LUKS mapping to be open
to access the file system within; therefore it also requires libparted
and kernel support for online partition resizing. This limits resizing
to the latest distributions with libparted >= 3.2 and kernel >= 3.6.
However growing an open LUKS mapping as part of a check repair operation
doesn't require resizing the partition. Therefore route via offline
grow of LUKS to avoid those extra, unnecessary requirement. This does
mean that offline LUKS grow artificially requires cryptsetup, but that is
not really significant as even opening LUKS requires cryptsetup.
So now checking an encrypted file system on even the oldest
distributions does:
1) runs FSCK on the encrypted file system;
2) grows the encryption volume to fill the partition;
3) grows the file system to fill the encryption mapping.
Bug 774818 - Implement LUKS read-write actions NOT requiring a
passphrase
Moving of closed LUKS is simply enabled by luks .move capability being
set and requires no further coding.
Resizing of encrypted file systems requires both the LUKS mapping and
encrypted file system within to be resized in the right order for both
shrinking and growing. To keep the code simple split resizing of plain
and encrypted into separate functions.
Bug 774818 - Implement LUKS read-write actions NOT requiring a
passphrase
Changing the Resize/Move dialog code to also handle PartitionLUKS
objects was considered too complicated. Instead create an unencrypted
equivalent using clone_as_plain(), pass that to the Resize/Move dialog
and finally apply the change back using Partition*::resize().
Bug 774818 - Implement LUKS read-write actions NOT requiring a
passphrase
Add a resize() method to both Partition and PartitionLUKS classes. They
take a reference Partition object, and update the position, size and
file system usage of *this Partition to match. This is ready for taking
a partition returned from Resize/Move dialog and applying the change.
Bug 774818 - Implement LUKS read-write actions NOT requiring a
passphrase
Implement a specialist PartitionLUKS clone method. Creates a new
Partition object which has the same space usage as the source encrypted
file system, but is a plain file system. Namely, the overhead of the
LUKS header has been added to the file system usage. This is ready for
feeding this representation of the partition to the Resize/Move dialog.
Bug 774818 - Implement LUKS read-write actions NOT requiring a
passphrase
Already have:
Utils::get_filesystem_string(FS_EXT2) -> "ext2"
virtual Partition::get_filesystem_string() -> "ext2"
virtual PartitionLUKS::get_filesystem_string() -> "[Encrypted] ext2"
Add these:
Utils::get_encrypted_string() -> "[Encrypted]"
Utils::get_filesystem_string(false, FS_EXT2) -> "ext2"
Utils::get_filesystem_string(true, FS_EXT2) -> "[Encrypted] ext2"
This is ready for use of Utils::get_filesystem_string(true, FS_EXT2)
when composing the preview of a format of an encrypted file system by
Win_GParted::activate_format().
Bug 774818 - Implement LUKS read-write actions NOT requiring a
passphrase
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
More recent versions of blkid don't report an ISO9660 file system on the
whole disk device if partitions can be reports for embedded partitions.
However when querying the whole disk device directly then the expected
ISO9660 file system is reported. For example on CentOS 7 with the
previous ISO images:
# wget http://git.kernel.org/cgit/utils/util-linux/util-linux.git/plain/tests/ts/isosize/sample.iso.gz
# dd if=/dev/zero bs=1M of=/dev/sdc
# zcat sample.iso.gz | dd of=/dev/sdc
# blkid -v
blkid from util-linux 2.23.2 (libblkid 2.23.0, 25-Apr-2013)
# blkid | fgrep /dev/sdc
/dev/sdc1: UUID="2013-01-04-22-05-45-00" LABEL="ARCH_201301" TYPE="iso9660" PTTYPE="dos"
# blkid /dev/sdc
/dev/sdc: UUID="2013-01-04-22-05-45-00" LABEL="ARCH_201301" TYPE="iso9660" PTTYPE="dos"
# wget http://cdimage.debian.org/debian-cd/8.6.0/amd64/iso-cd/debian-8.6.0-amd64-netinst.iso
# dd if=/dev/zero bs=1M of=/dev/sdc
# dd if=debian-8.6.0-amd64-netinst.iso bs=1M of=/dev/sdc
# blkid | fgrep /dev/sdc
/dev/sdc1: UUID="2016-09-17-14-23-48-00" LABEL="Debian 8.6.0 amd64 1" TYPE="iso9660" PTTYPE="dos"
/dev/sdc2: SEC_TYPE="msdos" UUID="17F3-1162" TYPE="vfat"
# blkid /dev/sdc
/dev/sdc: UUID="2016-09-17-14-23-48-00" LABEL="Debian 8.6.0 amd64 1" TYPE="iso9660" PTTYPE="dos"
This behavioural difference with blkid is probably as a result of newer
versions of udev informing the kernel of the partitions embedded within
the ISO9660 image, and not directly as a result of a change in blkid
itself. Older distributions don't have partition entries for the above
ISO images, but CentOS 7 (with udev 219) and later distributions do have
partition entries:
# fgrep sdc /proc/partitions
8 16 8388608 sdc
8 17 252928 sdc1
8 18 416 sdc2
Fix by ensuring that the blkid FS_Info cache has entries for whole disk
devices, even if each entry has all empty attributes because there is a
partition table and not a recognised file system.
Calling blkid on whole disk devices containing partition tables produces
output like this, with newer versions of blkid:
# blkid /dev/sda
/dev/sda: PTTYPE="dos"
# blkid /dev/sdb
/dev/sdb: PTTYPE="gpt"
This will be loaded into the FS_Info cache as a blank entry for the
device by run_blkid_load_cache(). There will be a path name but all the
other attributes will be blank because there are no TYPE, SEC_TYPE, UUID
or LABEL name value pairs. With older versions of blkid no output is
produced at all. In that case load_fs_info_cache_extra_for_path() will
create the same blank entry with just the path name defined.
Bug 771244 - gparted does not recognize the iso9660 file system in
cloned Ubuntu USB boot drives
Move code from GParted_Core::set_devices_thread() performing top level
population of each Device object during the scan of the drives into new
set_device_from_disk() method.
Bug 771244 - gparted does not recognize the iso9660 file system in
cloned Ubuntu USB boot drives
Requires blkid.
Note that FS_LUKS was also moved to more closely match the order in
include/Utils.h
Bug 771244 - gparted does not recognize the iso9660 file system in
cloned Ubuntu USB boot drives
FileSystem::resize() (and derived) is only ever called from a single
location and always with the fill_partition argument supplied [1].
Therefore providing a default for the argument is unnecessary. So
remove it.
[1] Since these two commits from 2006-06-17, before GParted 0.3.0, which
added resize_filesystem() and maximize_filesystem() methods to wrap
calls to p_filesystem->resize() into a single location:
08245cd08c
cleanups in the core and the fs'es (resize)
2d7fb5700b
more cleanups in the core and the fs'es (these changelogs are getting
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 \
Linux-swap is recreated as part of copy, resize and move operations and
the code was special cased to implement that by calling the linux-swap
specific resize method. However the displayed text always said "growing
file system" and then proceeded to recreate linux swap. Example
operation:
Copy /dev/sdb1 to /dev/sdb2
...
+ copy file system from /dev/sdb1 to /dev/sdb2
Partition copy action skipped because linux-swap file system does not contain data
+ grow file system to fill the partition
+ create new linux-swap file system
+ mkswap -L"" -U "77d939ef-54d6-427a-a2bf-a053da7eed4c" /dev/sdb2
Setting up swapspace version 1, size = 262140 KiB
LABEL=, UUID=77d939ef-54d6-427a-a2bf-a053da7eed4c
Fix by writing recreate_linux_swap_filesystem() method with better
messaging and use everywhere maximise_filesystem() was previously used
to recreate linux-swap. Also as this is a create step, erase the
partition first to prevent the possibility of any other file system
signatures being found afterwards. Now the operation steps are more
reflective of what is actually being performed.
Copy /dev/sdb1 to /dev/sdb2
...
+ copy file system from /dev/sdb1 to /dev/sdb2
Partition copy action skipped because linux-swap file system does not contain data
+ clear old file system signatures in /dev/sdb2
+ create new linux-swap file system
+ mkswap -L"" -U "77d939ef-54d6-427a-a2bf-a053da7eed4c" /dev/sdb2
Setting up swapspace version 1, size = 262140 KiB
LABEL=, UUID=77d939ef-54d6-427a-a2bf-a053da7eed4c
Bug 775932 - Refactor mostly applying of operations
resize_filesystem() was meeting two different needs:
1) when called with fill_partition = false it generated operation
details;
2) when called from maximize_filesystem() with fill_partition = true it
skipped generating any operation details;
then ran the switch statement to select the resize implementation. So
extract the common switch statement into new method
resize_filesystem_implement().
Then observe that the only time resize_filesystem() was called to grow
the file system was when re-creating linux-swap. Therefore change that
call to use maximize_filesystem() and rename to shrink_filesystem() and
modify the operation detail messages to match.
Bug 775932 - Refactor mostly applying of operations
Make the methods called below apply_operation_to_disk() follow a
standard naming convention:
* Contains "_partition"
Uses libparted to query or change the partition in the disk label
(partition table).
E.g.:
calibrate_partition()
create_partition()
delete_partition()
name_partition()
resize_move_partition()
set_partition_type()
* Contains "_filesystem"
Manipulates the file system within the partition, mostly using the
FileSystem and derived class methods.
E.g.:
create_filesystem()
remove_filesystem()
label_filesystem()
copy_filesystem()
erase_filesystem_signatures()
check_repair_filesystem()
resize_filesystem()
maximize_filesystem()
* Other
Compound method calling multiple partition and file system related
apply methods.
E.g.:
create()
format()
copy()
resize_move()
resize()
move()
Rename:
Delete() -> delete_partition()
change_uuid() -> change_filesystem_uuid()
Bug 775932 - Refactor mostly applying of operations
Until now an encryption mapping has been modelled as a Partition object
similar to a partition like this:
.encrypted.device_path = "/dev/sdb1"
.encrypted.path = "/dev/mapper/sdb1_crypt"
.encrypted.whole_device = false
.encrypted.sector_start = // start of the mapping in the partition
.encrypted.sector_end = // end of the mapping in the partition
However accessing device_path in the start to end sector range is not
equivalent to accessing the partition path as it doesn't provide access
to the encrypted data. Therefore existing functions which read and
write partition data (GParted file system copying and signature erasure)
via libparted using the device_path won't work and will in fact destroy
the encrypted data. This could be coded around with an extra case in
the device opening code, however it is not necessary.
An encrypted block special device /dev/mapper/CRYPTNAME looks just like
a whole disk device because it doesn't contain a partition and the file
system it contains starts at sector 0 and goes to the end. Therefore
model an encryption mapping in the same way a whole disk device is
modelled as a Partition object like this:
.encrypted.device_path = "/dev/mapper/sdb1_crypt"
.encrypted.path = "/dev/mapper/sdb1_crypt"
.encrypted.whole_device = true
.encrypted.sector_start = 0
.encrypted.sector_end = // size of the encryption mapping - 1
Now GParted file system copy and erasure will just work without any
change. Just need to additionally store the LUKS header size, which was
previous stored in the sector_start, for use in the
get_sectors_{used,unused,unallocated}() calculations.
Bug 775932 - Refactor mostly applying of operations
Split out the switch statement selecting the copy implementation and
associated copy file system operation detail message into a separate
copy_filesystem() method, matching how a number of other operations are
coded. This is why the previous copy_filesystem() methods needed
renaming.
Re-write the remaining copy() into if-operation-fails-return-false style
to simplify it. Re-write final complicated conditional check repair and
maximise file system into separate positive if conditions for swap and
larger partition to make it understandable.
The min_size parameter to copy() was queried from the partition_src
parameter also passed to copy(). Drop the parameter and query inside
copy() instead.
Bug 775932 - Refactor mostly applying of operations
Rename GParted_Core methods:
copy_filesystem(4 params) -> copy_filesystem_internal()
copy_filesystem(5 params) -> copy_filesystem_internal()
copy_filesystem(10 params) -> copy_blocks()
See the following commit for the desire to do this.
Bug 775932 - Refactor mostly applying of operations
Files were named Block_Copy and the class was named block_copy. Change
to the primary naming convention of CamelCase class name and matching
file names.
Also make CopyBlocks::copy_block() a private method as it is only used
internally within the class.
Bug 775932 - Refactor mostly applying of operations
These two methods had a lot of repeated and common code. Both determine
if the partition has any pending operations, notify the user that
changing the busy status can not be performed, and report any errors
when changing the status.
Extract the common code into sub-functions check_toggle_busy_allowed()
and show_toggle_failure_dialog() to handle showing the message dialogs.
Also refactor toggle_busy_state() to make it clear that it handles 5
cases of swapon, swapoff, activate VG, deactivate VG and unmount file
system.
Also remove out of date comment near the top of toggle_busy_state()
stating there can only be pending operations for inactive partitions is
out of date. Some file systems can be resized while online and
partition naming is allowed whatever the busy status of the file system.
Bug 775932 - Refactor mostly applying of operations
The primary reason to refactor unmount_partition() is to pass the
Partition object to be unmounted, rather than use member variable
selected_partition_ptr so that it doesn't have to handle the differences
between encrypted and non-encrypted Partition objects. The calling
function can deal with that instead. Then there were lots of small
reasons to change almost every other line too:
* Return success or failure rather than updating a passed pointer with
the result. Leftover from when the function used to be a separate
thread:
commit 52a2a9b00a
Reduce threading (#685740)
* Pass updated error string by reference rather than by pointer. Likely
another leftover.
* Stop borrowing the updated error string as a local variable for the
error output from the umount command. Use new umount_error local
variable instead. Was bad practice making the code harder to
understand.
* Rename failed_mountpoints to skipped_mountpoints to better reflect
that it contains the mount points not attempted to be unmounted
because two or more file systems are mounted at that point.
* Rename errors to umount_errors to better reflect it contains the
errors from each failed umount command.
* Document the reason for mount points being skipped.
* Update the skipped mount points message to state definitely why they
could not be unmounted rather than stating most likely.
* Simplify logic processing the error cases and return value.
* Made static because it no longer accesses any class members.
* Remove out dated "//threads.." comment from the header. Another
leftover from when the function use to be a separate thread.
Bug 775932 - Refactor mostly applying of operations
Reorder the parameters into the same order in which they occur in the
row, i.e. Name first, then Mount Point and finally Label. Rename local
variables in load_partitions(1 param) and parameters of
load_partitions(5 params) prefixing with "show_" to make it clearer the
variables track if that column will be displayed or not.
create_row() populates the values for each row to be displayed in the UI
from the relevant Partition object. However load_partitions(5 params)
independently decided if the Name, Mount Point and Label columns were
empty and should be displayed.
Getting the mount point value is more complex for encrypted file systems
because it has to call get_mountpoints() on the inner encrypted
Partition object. load_partitions(5 params) didn't account for this.
Fix by making create_row() both copy the values into each row and at the
same time check if they are empty to decide if they should be displayed
or not.
Bug 775475 - Mount Point column displayed for encrypted file systems
even when empty
If the GParted main window is closed before the initial device load
completed gpartedbin never exits. The main window closes but the
process sits there idle forever. Subsequently running GParted reports
this error:
# gparted
The process gpartedbin is already running.
Only one gpartedbin process is permitted.
If the user is running GParted from a desktop menu they will never see
this error so they will never know why GParted won't start any more.
More technically, it is if the main window is closed before the
Win_GParted::on_show() callback completes.
I assume the Gtk main loop doesn't setup the normal quit handling until
the on_show() callback finishes drawing the main window for the first
time. Following this hint [1], move the initial device load from the
on_show() callback to immediately after it completes by using a run once
idle callback setup in on_show().
This looks exactly the same to the user except now gpartedbin exits when
the main window is closed during the initial device load. Note that
GParted finished the device load before exiting. This is exactly the
same as happens when exiting during subsequent device refreshes.
[1] How to know when a Gtk Window is fully shown?
http://stackoverflow.com/questions/14663212/how-to-know-when-a-gtk-window-is-fully-shown
"If you want to know when your main window appears the first time,
it is far easier (and saner) add a g_idle_add after your show_all
call."
Bug 771816 - GParted never exits if the main window is closed before the
initial device load completes
This commit stopped setting the text colours in the Partition, File
System and Mount Point columns to avoid hard coding text colours making
them impossible to read when using GNOME's High Contrast Inverse theme:
ff2a6c00dd
Changes post gparted-0.3.6 - code recreation from Source Forge
* src/TreeView_Detail.cc: Removed text_color hard coding
- Removed hard coding of Partition and Filesystem text_color
which was based on if partition was TYPE_UNALLOCATED.
- Removed hard coding of Mount text_color which was based
on if partition was busy. Lock symbol provides this indicator.
- Closes GParted bug #413810 - Don't hardcode text colour in
partition list
Now remove the remaining vestiges left behind. Remove the unused color
text and mount_text_color columns from the tree model. Also remove
setting of the column attributes which set the colour of the text in the
tree view from those unused columns in the tree model.
Unnecessary history. Added by:
b179990dc9
show greyed-out mountpoint of unmounted partitions in the treeview
as an improved way to identify partitions
Bug #333027 - Displaying unmounted partitions' default mount points
in grey
and by commit only in CVS history:
Bart Hakvoort <...> 2004-08-22 15:06:45
Made text in Partition column darkgrey for unallocated. this offers
more visual difference between partitions and unallocated space
The GParted_Core::mount_info and GParted_Core::fstab_info maps and the
methods that manipulate them are self-contained. Therefore move them to
a separate Mount_Info module and reduce the size of the monster
GParted_Core slightly.
The FS_Info module has a pseudo multi-object interface and used the
constructor to load the cache. However all the data in the class is
static. An FS_Info object doesn't contain any member variables, yet was
needed just to call the member functions.
Make all the member functions static removing the need to use any
FS_Info objects and provide an explicit load_cache() method.
The Proc_Partitions_Info has a pseudo multi-object interface and uses
the constructor to load the cache. However all the data in the class is
static. A Proc_Partitions_Info object doesn't contain any member
variables, yet was needed just to call the member functions.
Make all the member functions static removing the need to use any
Proc_Partitions_Info objects and provide and explicit load_cache()
method.
Vol_id has been retired and removed from all supported distributions.
See earlier commit "Remove use of retired vol_id from FS_Info module
(#767842)" for more details. Therefore remove it's use from GParted
entirely.
GParted is already reading /proc/partitions to get whole disk device
names. The file also contains the major, minor device number of every
partition. Use this information to pre-populate the cache in the
BlockSpecial class.
# cat /proc/partitions
major minor #blocks name
8 0 20971520 sda
8 1 512000 sda1
8 2 20458496 sda2
...
9 3 1047552 md3
259 2 262144 md3p1
259 3 262144 md3p2
...
253 0 18317312 dm-0
253 1 2097152 dm-1
253 2 8383872 dm-2
253 3 1048576 dm-3
Note that for Device-Mapper names (dm-*) the kernel is not using the
canonical user space names (mapper/*). There is no harm in
pre-populating the cache with these names and will help if tools report
them too. It is just that for DMRaid, LVM and LUKS, GParted uses the
canonical /dev/mapper/* names so will still have to call stat() once for
each such name.
For plain disks (sd*) and Linux Software RAID arrays (md*) the kernel
name is the common user space name too, therefore matches what GParted
uses and pre-populating does avoid calling stat() at all for these
names.
Bug 767842 - File system usage missing when tools report alternate block
device names
Creation of every BlockSpecial object used to result in a stat() OS
call. On one of my test VMs debugging with 4 disks and a few partitions
on each, GParted refresh generated 541 calls to stat() in the
BlockSpecial(name) constructor. However there were only 45 unique
names. So on average each name was stat()ed approximately 12 times.
Cache the major, minor number associated with each name after starting
with a cleared cache for each GParted refresh. This reduces these
direct calls to stat() to just the 45 unique names.
Bug 767842 - File system usage missing when tools report alternate block
device names
The FS_Info cache is loaded from "blkid" output and compares block
special names. Therefore switch to using BlockSpecial objects so that
comparisons are performed by the major, minor device number instead.
Bug 767842 - File system usage missing when tools report alternate block
device names
FS_Info module caches the output from blkid as a single string and uses
regular expressions to find the line matching the requested block
special file name. This is not compatible with using BlockSpecial
objects to represent block special files, and perform matching by major,
minor device number. Therefore parse the blkid output into a vector of
structures containing the needed fields, ready for switching to
BlockSpecial objects in the following patch.
Interface to the module remains unchanged.
Bug 767842 - File system usage missing when tools report alternate block
device names
Vol_id was removed from udev 142, released 2009-05-13, and udev switched
to using blkid instead [1]. All currently supported distributions use
later versions of udev (or systemd after the udev merge), except for
RedHat / CentOS 5 with udev 095. However RedHat / CentOS 5 does provide
blkid and vol_id is found in udev specific /lib/udev directory not on
the PATH. Therefore effectively vol_id is not available on any
supported distribution and blkid is always available. Therefore remove
use of vol_id from the FS_Info module. Less code to refactor and test
in following changes.
[1] delete vol_id and require util-linux-ng's blkid
http://git.kernel.org/cgit/linux/hotplug/udev.git/commit/?id=f07996885dab45102492d7f16e7e2997e264c725
Bug 767842 - File system usage missing when tools report alternate block
device names
The SWRaid_Info cache is loaded from "mdadm" command output and
/proc/mdstat file. It contains the member name which is used to access
the cache, therefore switch to using BlockSpecial objects so that
comparison is performed using the major, minor device number.
Bug 767842 - File system usage missing when tools report alternate block
device names
The LUKS_Info module cache is loaded from "dmsetup" command and compares
block special files, therefore switch to using BlockSpecial objects so
that comparisons are performed by major, minor device number.
Bug 767842 - File system usage missing when tools report alternate block
device names
Small optimisation which avoids constructing an extra BlockSpecial
object when determining if a btrfs member is mounted. Rather than
extracting the name from the BlockSpecial object in
btrfs::get_mount_device() and re-constructing another BlockSpecial
object from that name in GParted_Core::is_dev_mounted(), pass the
BlockSpecial object directly.
Bug 767842 - File system usage missing when tools report alternate block
device names
There are no known errors which affect the remaining caches in GParted.
However those caches which compare block special devices will be changed
to use BlockSpecial objects so comparison is by major, minor device
number rather than by name.
Change btrfs member cache loaded from "btrfs filesystem show" output to
use BlockSpecial objects.
Bug 767842 - File system usage missing when tools report alternate block
device names
On some distributions having btrfs on top of LUKS encrypted partitions,
adding a second device and removing the first device used to mount the
file system causes GParted to no longer be able to report the file
system as busy or the mount points themselves.
For example, on CentOS 7, create a single btrfs file system and mount
it. The provided /dev/mapper/sdb1_crypt name is reported, via
/proc/mounts, as the mounting device:
# cryptsetup luksFormat --force-password /dev/sdb1
# cryptsetup luksOpen /dev/sdb1 sdb1_crypt
# mkfs.btrfs -L encrypted-btrfs /dev/mapper/sdb1_crypt
# mount /dev/mapper/sdb1_crypt /mnt/1
# ls -l /dev/mapper
total 0
lrwxrwxrwx. 1 root root 7 Jul 2 14:15 centos-root -> ../dm-1
lrwxrwxrwx. 1 root root 7 Jul 2 14:15 centos-swap -> ../dm-0
crw-------. 1 root root 10, 236 Jul 2 14:15 control
lrwxrwxrwx. 1 root root 7 Jul 2 15:14 sdb1_crypt -> ../dm-2
# fgrep btrfs /proc/mounts
/dev/mapper/sdb1_crypt /mnt/1 btrfs rw,seclabel,relatime,space_cache 0 0
Add a second device to the btrfs file system:
# cryptsetup luksFormat --force-password /dev/sdb2
# cryptsetup luksOpen /dev/sdb2 sdb2_crypt
# btrfs device add /dev/mapper/sdb2_crypt /mnt/1
# ls -l /dev/mapper
...
lrwxrwxrwx. 1 root root 7 Jul 2 15:12 sdb2_crypt -> ../dm-3
# btrfs filesystem show /dev/mapper/sdb1_crypt
Label: 'encrypted-btrfs' uuid: 45d7b1ef-820c-4ef8-8abd-c70d928afb49
Total devices 2 FS bytes used 32.00KiB
devid 1 size 1022.00MiB used 12.00MiB path /dev/mapper/sdb1_crypt
devid 2 size 1022.00MiB used 0.00B path /dev/mapper/sdb2_crypt
Remove the first mounting device from the btrfs file system. Now the
non-canonical name /dev/dm-3 is reported, via /proc/mounts, as the
mounting device:
# btrfs device delete /dev/mapper/sdb1_crypt /mnt/1
# btrfs filesystem show /dev/mapper/sdb2_crypt
Label: 'encrypted-btrfs' uuid: 45d7b1ef-820c-4ef8-8abd-c70d928afb49
Total devices 1 FS bytes used 96.00KiB
devid 2 size 1022.00MiB used 144.00MiB path /dev/mapper/sdb2_crypt
# fgrep btrfs /proc/mounts
/dev/dm-3 /mnt/1 btrfs rw,seclabel,relatime,space_cache 0 0
# ls -l /dev/dm-3
brw-rw----. 1 root disk 253, 3 Jul 2 15:12 /dev/dm-3
GParted loads the mount_info mapping from /proc/mounts and with it the
/dev/dm-3 name. When GParted is determining if the encrypted btrfs file
system is mounted or getting the mount points it is using the
/dev/mapper/sdb2_crypt name. Therefore no information is found and the
file system is incorrectly reported as unmounted.
Fix by changing mount_info and fstab_info to use BlockSpecial objects
instead of strings so that matching is performed by major, minor device
numbers rather than by string compare. Note that as BlockSpecial
objects are used as the key of std::map [1] mappings operator<() [2]
needs to be provided to order the key values.
[1] std::map
http://www.cplusplus.com/reference/map/map/
[2] std::map::key_comp
http://www.cplusplus.com/reference/map/map/key_comp/
Bug 767842 - File system usage missing when tools report alternate block
device names
In some cases creating an LVM2 Physical Volume on top of a DMRaid array
reports no usage information and this partition warning:
Unable to read the contents of this file system!
Because of this some operations may be unavailable.
The cause might be a missing software package.
The following list of software packages is required for lvm2
pv file system support: lvm2.
For example on Ubuntu 14.04 LTS (with GParted built with
--enable-libparted-dmraid) create an LVM2 PV in a DMRaid array
partition. GParted uses this command:
# lvm pvcreate -M 2 /dev/mapper/isw_bacdehijbd_MyArray0p2
But LVM reports the PV having a different name:
# lvm pvs
PV VG Fmt Attr PSize PFree
/dev/disk/by-id/dm-name-isw_bacdehijbd_MyArray0p2 lvm2 a-- 1.00g 1.00g
This alternate name is loaded into the LVM2_PV_Info module cache. Hence
when GParted queries partition /dev/mapper/isw_bacdehijbd_MyArray0p2 it
has no PV information against that name and reports unknown usage.
However they are actually the same block special device; major 252,
minor 2:
# ls -l /dev/mapper/isw_bacdehijbd_MyArray0p2
brw-rw---- 1 root disk 252, 2 Jul 2 11:09 /dev/mapper/isw_bacdehijbd_MyArray0p2
# ls -l /dev/disk/by-id/dm-name-isw_bacdehijbd_MyArray0p2
lrwxrwxrwx 1 root root 10 Jul 2 11:09 /dev/disk/by-id/dm-name-isw_bacdehijbd_MyArray0p2 -> ../../dm-2
# ls -l /dev/dm-2
brw-rw---- 1 root disk 252, 2 Jul 2 11:09 /dev/dm-2
To determine if two names refer to the same block special device their
major, minor numbers need to be compared, instead of string comparing
their names.
Implement class BlockSpecial which encapsulates the name and major,
minor numbers for a block special device. Also performs comparison as
needed. See bug 767842 comments 4 and 5 for further investigation and
decision for choosing to implement a class.
Replace name strings in the LVM2_PV_Info module with BlockSpecial
objects performing correct block special device comparison.
Bug 767842 - File system usage missing when tools report alternate block
device names
Now Device and Partition objects only have a single path,
get_alternate_paths() is never called. Remove the method and population
of the private alternate_paths_cache member that went with it.
Bug 767842 - File system usage missing when tools report alternate block
device names
Mike Fleetwood