get_disk() is the wrapper around libparted's ped_disk_new() which reads
a disk label from the specified device and if successful creates the in
memory PedDisk object to represent it. In the case that libparted
doesn't recognise a disk label or a file system, having get_disk() go
and destroy the passed in PedDevice object via parameter lp_device is
very unexpected behaviour hence describing it as a coding landmine.
BACKGROUND
1. Early on GParted only worked with devices with valid disk labels.
FileSystem.h:open_device_and_disk() required both ped_device_get()
and ped_disk_new() to succeed or neither to succeed.
2. Commit [1] added support for devices which didn't yet have a disk
label. open_device_and_disk() had default parameter strict=true
added. While scanning strict=false was passed which allowed
open_device_and_disk() to return success if only ped_device_get()
succeeded and ped_disk_new() failed when the disk was empty. All
other times open_device_and_disk() was called with default
strict=true, still requiring both or neither to succeed.
3. Commit [2] added support for whole disk file systems. The now named
get_device_and_disk() had it's functionality split between
get_device() and get_disk(). This result in the code landmine being
left behind: get_disk() destroying the passed device object if
default parameter strict=true and no disk label or file system was
detected.
ANALYSIS
1. Since support for whole disk file systems [2] all current calls to
get_device_and_disk() let the strict parameter default to true and
are only called on known partitions within disk labels when applying
a change to that partition. Therefore they don't care about the
behaviour of get_disk(), just that get_device_and_disk() maintains
that both ped_device_get() and ped_disk_new() succeed or neither
succeed.
2. Two direct calls to get_disk() where the strict parameter defaults to
true, from calibrate_partition() and erase_filesystem_signatures(),
only do so on known partitions within disk labels as part of applying
a change to that partition. Therefore ped_disk_new() will succeed
and so PedDevice isn't deleted when not wanted.
3. The two remaining direct calls to get_disk() where the strict
parameter is explicitly set to false, from set_device_from_disk() and
detect_filesystem_in_encryption_mapping(), are when scanning. As the
pass strict=false they don't allow the PedDevice deletion to occur if
no recognised disk label is found.
FIX
Remove the strict parameter from get_disk() and get_device_and_disk() as
it's no longer needed. Remove the code landmine by removing the side
affect of destroying the PedDevice object if a disk label isn't found.
Make sure get_device_and_disk() maintains the all or nothing behaviour.
Also don't pass lp_device by reference to a pointer to get_disk() so the
code can't change where lp_device points.
[1] 038c5c5d99
P (special thanks to mantiena-baltix for bringing this issue to my
[2] 51ac4d5648
Split get_device_and_disk() into two (#743181)
Closes#152 - GParted crashed when trying to probe an encrypted
partition containing content that libparted doesn't
recognise
As discussed in the previous commit "Don't crash probing libparted
unrecognised encrypted file system (#152)", detect_filesystem() accepted
a NULL lp_device pointer and dereferenced it leading to the crash.
Document the requirement for lp_device parameter to be non-NULL via an
assert and also correctly const the parameters.
This forces needing to const the lp_partition parameter to
get_partition_path() too. Also assert it's non-NULL requirement.
Closes#152 - GParted crashed when trying to probe an encrypted
partition containing content that libparted doesn't
recognise
To avoid making set_luks_partition() more complicated extract the file
system detection portion into a new function.
Closes 148 - Encrypted file systems are no longer recognised
GParted_Core::FILESYSTEMS and ::FILESYSTEM_MAP and the methods that
query and manipulate them are self-contained. Therefore move them into
a separate SupportedFileSystems module.
Also having a single class maintaining all FileSystem interface objects
will make testing all the file system types much easier as there will be
no need to duplicate this functionality in the test.
Closes!49 - Add file system interface tests
After the previous commit the lp_device structure pointer parameter is
only used to provide sector_size. Just pass that instead.
Closes!46 - Whole device FAT32 file system reports device busy warning
from mlabel
Closes#16 - "invalid argument for seek()" error on very small (<=40KiB)
drives
GParted_Core::useable_device() doesn't change the pointed to PedDevice
structure. Pass it as const so the compiler enforces this.
Closes!46 - Whole device FAT32 file system reports device busy warning
from mlabel
Move snap_to_*() method calls from the point when all operations are
added to the list, to earlier when Resize/Move, Paste (into new) and
Create New dialogs are composing the new partition objects. In
particular for the Resize/Move operation, to just before updating the
file system usage.
This change finally resolves this bug.
Because of the dialog call chains into Dialog_Base_Partition,
snap_to_alignment() must be added into:
* Dialog_Base_Partition::prepare_new_partition() for the Resize/Move and
Paste (into new) dialogs; and
* Dialog_Partition_New::Get_New_Partition() for the Create New dialog.
Closes#48 - Error when moving locked LUKS-encrypted partition
None of the snap_to_*() methods report any errors so remove the unused
error parameter and return value.
Closes#48 - Error when moving locked LUKS-encrypted partition
PATCHSET OVERVIEW
A user had 2 adjacent partitions which were aligned to multiples of
33553920 bytes (32 MiB - 512 bytes), not MiB or cylinders. As far as
GParted is concerned this is not aligned. The second partition
contained closed LUKS encrypted data. Recreate this setup with:
# truncate -s 200G /tmp/disk.img
# losetup -f --show /tmp/disk.img
/dev/loop0
# sfdisk -u S /dev/loop0 << EOF
65535 2162655 83
2228190 78904140 83
EOF
# partprobe /dev/loop0
# echo -n badpassword | cryptsetup luksFormat /dev/loop0p2 -
When trying to move the second LUKS encrypted partition to the right by
any amount, with the default MiB alignment, GParted displays this error
dialog and fails to even queue the operation:
Could not add this operation to the list
A partition with used sectors (78907392) greater than its
length (78905344) is not valid
[ OK ]
Overview of the steps involved:
1. The Resize/Move dialog composed a new partition to start a whole
multiple of MiB after the end of the previous non-aligned partition.
The new partition also had it's size increased to a whole multiple of
MiB, to 78907392 sectors (38529 MiB) which was 1.59 MiB larger than
before. Neither the start or end of the new partition are aligned at
this point.
2. Win_GParted::activate_resize() applied the change back to the closed
LUKS partition object, additionally making the used sectors equal to
the partition size.
(To match the fact that when opened the LUKS mapping it will
automatically fill the new larger partition size).
3. GParted_Core::snap_to_mebibyte() then aligned the partition start and
end to whole MiB boundaries, reducing the partition size in the
process to 78905344 (38528 MiB).
4. GParted_Core::snap_to_alignment() reported the error saying that it
couldn't add the operation to the list because it was invalid to have
the file system used sectors larger than the partition size.
Fix this by having the snap to alignment adjustments applied before the
dialogs update any associated file system usage. Specifically the
Resize/Move, Paste (into new) and Create New dialogs as these are the
only ones which either create or modify partition boundaries.
Validation done by snap_to_alignment() will continue to occur at the
current point when the operation is added to the list.
THIS COMMIT
snap_to_alignment() is doing two different jobs, it is (1) optionally
adjusting the new partition boundaries for MiB or Cylinder alignment;
and (2) checking that the partition boundaries and file system usage are
valid.
Split those into two different functions (1) snap_to_alignment() and
(2) valid_partition(). For now valid_partition() still calls
snap_to_alignment() so there is no functional change with this commit.
Closes#48 - Error when moving locked LUKS-encrypted partition
So that we might get more information from users when helping them.
Starting GParted from the command line now looks like this:
# ./gpartedbin
GParted 0.33.0-git
configuration --enable-online-resize
libparted 3.2
Closes!34 - Display more version and configuration information
Now that we are compiling against Gtkmm3 there are missing declarations
of Glibmm identifiers due to changes in Gtkmm internal header structure.
All we have to do is bring back the declarations by including the
appropriate headers where needed.
Add necessary Glibmm header includes.
Closes#7 - Port to Gtk3
Create an active Linux Software RAID member which is larger than /dev
virtual file system and GParted will report the usage figure of the /dev
virtual file system for the SWRAID member.
# df -h /dev
Filesystem Size Used Avail Use% Mounted on
devtmpfs 732M 0 732M 0% /dev
# sgdisk -n 1:1M:+1G /dev/sdb
# mdadm --create --verbose /dev/md1 --level=linear --raid-devices=1 --force /dev/sdb1
mdadm: Defaulting to version 1.2 metadata
mdadm: array /dev/md1 started.
GParted reports the usage of /dev/sdb1 as:
Partition Mount Point Size Used Unused Unallocated
/dev/sdb1 /dev/md1 1.00GiB 0.00B 731.04MiB 292.96MiB
However GParted should have reported the usage as "---" for unknown
because it isn't coded to query the size of the SWRAID member within a
partition.
The fault has been bisected to this commit:
Extend un/mounting and usage reporting to unsupported file systems (!13)
95903efb1f
What happens for busy Linux Software RAID array members:
* GParted_Core::is_busy()
has custom code to identify busy members.
* GParted_Core::set_mountpoints()
has custom code to add the array device name as the "mount point" of
the member.
* GParted_Core::set_used_sectors()
falls into the else not a supported file system (because SWRAID
doesn't have a derived FileSystem implementation class).
* GParted_Core::mounted_set_used_sectors()
is called to get the file system usage of mounted, but unsupported
file systems, such as UFS and any others.
* Utils::get_mounted_filesystem_usage()
is called which queries the kernel using statvfs() and gets the file
system usage of the /dev virtual file system because the array
device name will always start /dev.
Fix by ensuring that GParted only asks the kernel for the usage of paths
which it knows are mount points of mounted file systems. (As read from
/proc/mounts and cached in the Mount_Info module). Also rename the
method, by inserting "_fs", to mounted_fs_set_used_sectors() to remind
us that it is for mounted *file systems* only.
Closes#27 - GParted may report incorrect usage for SWRAID partitions
instead of unknown
S
The function was using std::map::count() [1] to test if the file system
entry existed in the map before looking up the value using
std::map::operator[] to avoid having operator[] inserting elements which
don't exist [2].
Rewrite using std::map::find() [3] so that map is only searched once,
and so that it is more obvious what is happening without having to know
the subtleties of std::map::count() and ::operator[].
[1] std::map::count()
http://www.cplusplus.com/reference/map/map/count/
"Searches the container for elements with a key equivalent to k and
returns the number of matches.
Because all elements in a map container are unique, the function can
only return 1 (if the element is found) or zero (otherwise).
"
[2] std::map::operator[]
http://www.cplusplus.com/reference/map/map/operator[]/
"If k does not match the key of any element in the container, the
function inserts a new element with that key and returns a reference
to its mapped value. Notice that this always increases the
container size by one, even if no mapped value is assigned to the
element (the element is constructed using its default constructor).
"
[3] std::map::find
http://www.cplusplus.com/reference/map/map/find/
"Searches the container for an element with a key equivalent to k
and returns an iterator to it if found, otherwise it returns an
iterator to map::end.
"
There are too many different types of things named "filesystem" in the
GParted code with the potential to cause confusion. Namely:
std::vector<FS> FILESYSTEMS
Vector of file system capabilities.
class FileSystem Base class interfacing to file system
specific executables for querying and
modification.
enum FILESYSTEM Symbolic constants representing each file
system type.
Many recent written or re-written functions already used a variable
named fstype. Rename enum FILESYSTEM to enum FSType to clearly
distinguish it from the other things with very similar names. Only
changing the name of the enumeration, not the name of variables of that
type too because that is a lot more lines of code and those can be
changed when the relevant code is re-written.
There are multiple repetitions of the same code getting a FileSystem
object, checking for NULL and then calling the file system specific
get_filesystem_limits(). Extract that into a common function.
GParted_Core::get_filesystem_limits() can't use the file system from the
passed Partition object because that is the current file system which
will be different from the intended file system for new and format
operations. So would look up the wrong derived FileSystem specific
object and call the wrong get_filesystem_limits(). Hence still needing
fstype as a separate parameter to pass the intended file system.
Bug 787204 - Minimum and maximum size of the UDF partition/disk
The general rule is that:
1) For a partition change step BEFORE a file system change step,
rollback on failure;
2) For a partition change step AFTER a file system change step, don't
rollback on failure.
Examining every case where resize_move_partition() is called and whether
rollback on failure is wanted or not:
* In resize_move()
Resize / move extended partition. No associated file system change.
NO ROLLBACK
Just to keep possibly applied operation.
* #1 in move()
Making all encompassing partition before moving file system.
ROLLBACK
To restore partition boundaries back to those of the file system.
* #2 in move()
Recreating original partition boundaries after file system move
failed or was cancelled and has been rolled back.
NO ROLLBACK
To keep updated partition boundaries to match restored file system
data.
* #3 in move()
Replacing all encompassing partition with final partition after
successful file system move.
NO ROLLBACK
Keep new partition boundaries to match moved file system.
* #1 in resize_encryption()
Making the partition larger before growing closed LUKS encrypted
data.
ROLLBACK
Restore partition boundaries back to those of the closed LUKS
encrypted data.
* #2 in resize_encryption()
Shrinking the partition after open LUKS mapping has been shrunk, but
before swap is re-created (smaller).
NO ROLLBACK
Difficult case because the partition shrink is in the middle of a
LUKS shrink and a swap shrink (re-create). If swap was actually
shrunk like other types of file system, rather than re-created, then
the operation sequence would be (1) shrink swap, (2) shrink LUKS
encryption, (3) shrink partition. In this hypothetical case and the
actual case no rollback is preferred to try to keep the new
partition boundaries match the shrunk open LUKS encryption mapping.
* #3 in resize_encryption()
Grow the partition before growing open LUKS mapping and re-creating
swap larger.
ROLLBACK
Restore partition boundaries back to those of the smaller open LUKS
encryption mapping.
* #4 in resize_encryption()
Shrink the partition after shrinking the file system and open LUKS
encryption mapping.
NO ROLLBACK
Keep new smaller partition boundaries to match shrunk encrypted file
system.
* #5 in resize_encryption()
Grow the partition before growing the open LUKS encryption mapping
and file system.
ROLLBACK
Restore partition boundaries back to those of the not yet grown
encrypted file system.
* #1 in resize_plain()
Resize partition before re-creating swap a different size.
ROLLBACK
Restore partition boundaries back to those of the not yet resized
(re-created) swap space.
* #2 in resize_plain()
Shrink partition after shrinking the file system.
NO ROLLBACK
Keep new smaller partition boundaries to match shrunk file system.
* #3 in resize_plain()
Grow partition before growing the file system.
ROLLBACK
Restore partition boundaries back to those of the not yet grown
file system.
Removes the default value from the rollback_on_fail parameter so
rollback or not has to be explicitly specified for every call of
resize_move_partition().
Bug 791875 - Rollback specific failed partition change steps
Even after implementing a fix for bug 790418 "Unable to inform the
kernel of the change message may lead to corrupted partition table"
GParted/libparted can still encounter errors informing the kernel of the
new partition layout. This has been seen with GParted on CentOS 7 with
libparted 3.1.
In such a case the partition has been successfully written to the disk
but just informing the kernel failed. This is a problem because when a
partition is being moved in advance of a file system move step, failure
to inform the kernel leaves the partition boundaries not matching the on
disk limits of the file system. For a move to the left this leaves the
partition reported as unknown, apparently losing the user's data.
For example start with a 512 MiB partition containing an XFS file
system. This is recognised by blkid and parted, hence also by GParted.
# blkid /dev/sdb1
/dev/sdb1: UUID=... TYPE="xfs" PARTUUID="37965980-01"
# parted /dev/sdb unit s print
Model: ATA VBOX HARDDISK (scsi)
Disk /dev/sdb: 16777216s
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags:
Number Start End Size Type File system Flags
1 1048576s 2097151s 1048576s primary xfs
Now move the partition 100 MiB to the left and have it fail to inform
the kernel after the first partition change step. Operation details:
Move /dev/sdb1 to the left (ERROR)
* calibrate /dev/sdb1 (SUCCESS)
* check file system on /dev/sdb1 for errors and (if poss...(SUCCESS)
* grow partition from 512.00 MiB to 612.00 MiB (ERROR)
old start: 1048576
old end: 2097151
old size: 1048576 (512.00 MiB)
requested start: 843776
requested end: 2097151
requested size: 1253376 (612.00 MiB)
* libparted messages (ERROR)
Error informing the kernel about modifications to partition
/dev/sdb1 -- Device or resource busy. This means Linux won't
know about any changes you made to /dev/sdb1 until you reboot
-- so you shouldn't mount it or use it in any way before
rebooting. Failed to add partition 1 (resource temporarily
unavailable)
Now because the start of the partition is 100 MiB before the start of
the file system, the file system is no longer recognised, and apparently
the user's data has been lost.
# blkid /dev/sdb1
/dev/sdb1: PARTUUID="37965980-01"
# parted /dev/sdb unit s print
...
Number Start End Size Type File system Flags
1 843776s 2097151s 1253376s primary
It doesn't matter why updating the partition failed, even if it was
because of an error writing to the disk. Rollback of the change to the
partition should be attempted. The worst case scenario is that rollback
of the change fails, which is the equivalent to how the code worked
before this patch set.
However in other cases where the partition boundaries are being updated
after a file system move or shrink step then the partition should be
updated to match the new location of the file system itself. And no
rollback is wanted. If the failure was only informing the kernel then
in fact the partition has actually been updated on disk after all.
So each partition resize/move step needs examining on a case by case
basis to decide if rolling back the change to the partition is wanted or
not.
This patch only adds partition change rollback into
resize_move_partition(). Rollback remains disabled until all cases are
examined in the following patch.
Bug 791875 - Rollback specific failed partition change steps
Extract common code which updates a DMRaid device mapper entry into a
sub-function. This will also be needed when adding rollback of a
partition change on failure.
Bug 791875 - Rollback specific failed partition change steps
Extract the code which actually implements the partition change into a
sub-function ready for adding rollback of the change on failure.
Bug 791875 - Rollback specific failed partition change steps
All libparted messages were reported as informational, even for a step
which failed. Instead identify libparted messages as either
informational or errors depending on whether this step was successful
or not respectively.
Bug 790842 - Report libparted messages into operation details at the
point at which they occur
Replace the explicit adding of libparted exception messages with a
callback to do it instead, and fire the callback just once per operation
by only changing the very top-level OperationDetail to use the new
set_success_and_capture_errors(). Therefore this still produces exactly
the same operation details with libparted messages at the end of each
operation.
Bug 790842 - Report libparted messages into operation details at the
point at which they occur
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
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
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
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
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.
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
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
When there exists an open dm-crypt mapping, populate the encrypted
Partition object representing the encrypted file system.
Bug 760080 - Implement read-only LUKS support
This is the equivalent change as made to set_mountpoints() in an earlier
commit. Change GParted_Core::set_used_sectors() from being called with
a vector of partitions and processing them all to being called per
partition. This is in preparation for calling set_used_sectors() on a
single Partition object inside a PartitionLUKS object.
Bug 760080 - Implement read-only LUKS support
Previously GParted_Core::set_mountpoints() was called with a vector of
partitions and processed them all. Now make set_mountpoints() process a
single partition and push the calls to it down one level from
set_devices_thread() into set_device_partitions() and
set_device_one_partition(). This is in preparation for having an
encrypted file system represented as a Partition object inside a
PartitionLUKS object and needing to call set_mountpoints() for the inner
single Partition object.
Bug 760080 - Implement read-only LUKS support
Load basic details of active Device-mapper encryption mappings from the
kernel. Use dmsetup active targets.
# cryptsetup luksFormat /dev/sdb5
# cryptsetup luksFormat /dev/sdb6
# cryptsetup luksOpen /dev/sdb6 sdb6_crypt
# ls -l /dev/mapper/sdb6_crypt /dev/dm-0
lrwxrwxrwx. 1 root root 7 Nov 15 09:03 /dev/mapper/sdb6_crypt -> ../dm-0
brw-rw----. 1 root disk 253, 0 Nov 15 09:03 /dev/dm-0
# ls -l /dev/sdb6
brw-rw----. 1 root disk 8, 22 Nov 15 09:02 /dev/sdb6
# dmsetup table --target crypt
sdb6_crypt: 0 1044480 crypt aes-cbc-essiv:sha256 0000000000000000000000000000000000000000000000000000000000000000 0 8:22 4096
So far just load the mapping name and underlying block device reference
(path or major, minor pair).
Note that all supported kernels appear to report the underlying block
device as major, minor pair in the dmsetup output. Underlying block
device paths are added to the cache when found during a search to avoid
stat(2) call on subsequent searches for the same path.
Prints debugging to show results, like this:
# ./gpartedbin
======================
libparted : 2.4
======================
DEBUG: /dev/sdb5: LUKS closed
DEBUG: /dev/sdb6: LUKS open mapping /dev/mapper/sdb6_crypt
Bug 760080 - Implement read-only LUKS support
GParted_Core and Operation classes both have an insert_unallocated()
method which do the same thing with very nearly identical code. Both
methods insert unallocated partitions into the vector of partitions
within the specified range of sectors to fill in any gaps larger than
1 MiB. The only difference was how the two methods got the device path;
the GParted_Core class method got it via a parameter and the Operation
class method got it by calling get_path() on its device member variable.
The GParted_Core insert_unallocated() method gets called during device
scanning and the Operation one gets called when constructing the visual
for a pending operation.
Consolidate down to a single insert_unallocated() implementation by
making the Operation class method call the GParted_Core class method.
Make the GParted_Core class method static and public so that it can be
called using the class name from outside the class.
Bug 759726 - Implement Partition object polymorphism
Abstract code checking sector size and ensuring the first sector of a
candidate disk device can be read into new
GParted_Core::useable_device() method.
Bug 755495 - GParted allowing partitioning of large sector devices
specified on the command line, when built with old
libparted which doesn't support it
Since GParted commit 52a2a9b "Reduce threading (#685740)", released in
GParted 0.15.0, application of operations occurs in the main thread
running the UI, therefore long running libparted actions such as
resizing a FAT16 or FAT32 file system hang the UI for as long as it take
to complete the operation.
https://git.gnome.org/browse/gparted/commit/?id=52a2a9b00a32996921ace055e71d0e09fb33c5fe
Though this problem exists for all libparted actions, it is particularly
noticeable when performing a large resize of fat16/fat32/hfs/hfs+ file
systems.
To address this significant cause of an unresponsive GUI, this
enhancement adds threading to the libparted ped_file_system_resize
function call.
Bug 737022 - UI hangs while running libparted operations such as
FAT16/FAT32 resizing
Previously on every refresh for every device, GParted was searching the
PATH to discover if the hdparm command existed. Stracing GParted showed
that calling Glib::find_program_in_path("hdparm") made the following OS
calls:
access("/usr/lib64/qt-3.3/bin/hdparm", X_OK) = -1 ENOENT (No such file or directory)
access("/usr/local/sbin/hdparm", X_OK) = -1 ENOENT (No such file or directory)
access("/usr/local/bin/hdparm", X_OK) = -1 ENOENT (No such file or directory)
access("/sbin/hdparm", X_OK) = 0
getuid() = 0
stat("/sbin/hdparm", {st_mode=S_IFREG|0755, st_size=137, ...}) = 0
stat("/sbin/hdparm", {st_mode=S_IFREG|0755, st_size=137, ...}) = 0
The Linux VFS is very fast but repeatedly doing this is wasteful.
Remember the result of searching the PATH for the hdparm command at
startup and refresh this when the [Rescan For Supported Actions] button
is pressed in the File System Support dialog. This is the same as
GParted already does for file system specific commands and their
capabilities.
Bug 751251 - Show serial number in device information
Run "hdparm -I /dev/DISK" to get the hard drive serial number of
every device which has one and display it in the Device Information.
The displayed value can either be the actual serial number, "none" or
blank. "none" means the device doesn't have a hard drive serial number,
such as for Linux software RAID arrays, BIOS fake RAID arrays or USB
flash drives. Blank means something went wrong getting the serial
number. Either it couldn't be found in the hdparm output or the hdparm
command wasn't installed.
Example real hard drive:
# hdparm -I /dev/sda
...
ATA device, with non-removable media
Model Number: SAMSUNG HM500JI
Serial Number: S1WFJDSZ123732
...
Example Linux software RAID array:
# hdparm -I /dev/md127
/dev/md127:
HDIO_DRIVE_CMD(identify) failed: Inappropriate ioctl for device
On my desktop with 4 internal hard drives 2 Linux software RAID arrays
on those hard drives, 2 USB flash drives and 1 USB hard drive attached,
running hdparm 9 times added 0.07 seconds to the device refresh time.
Bug 751251 - Show serial number in device information
Rename a couple of GParted_Core methods for consistency and to better
distinguish get_filesystem() from get_filesystems() which do completely
unrelated things.
get_filesystem() -> detect_filesystem()
recognise_filesystem_signature() -> detect_filesystem_internal()
Also make detect_filesystem() a static member method as it doesn't use
any member variables. Requirement cascades to get_partition_path().
Mike Fleetwood