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
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
Now that Partition objects only have a single path, rather than a list
of paths, stop performing unnecessary actions in calibrate_partitions()
which added alternate paths reported from libparted. Just left with
setting the partition path name correctly, when the path name doesn't
exist. Happens when the path is set to "Copy of /dev/SRC" when the
partition was newly created by a copy-paste into unallocated space
earlier in the sequence of operations now being applied.
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
To reflect that there is only a single path in the Device object now.
Also get rid of the now unneeded optional 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
Background
GParted stored a list of paths for Device and Partition objects. It
sorted this list [1][2] and treated the first specially as that is what
get_path() returned and was used almost everywhere; with the file system
specific tools, looked up in various *_Info caches, etc.
[1] Device::add_path(), ::add_paths()
[2] Partition::add_path(), ::add_paths()
Mount point display [3] was the only bit of GParted which really worked
with the path list. Busy file system detection [4] just used the path
provided by libparted, or for LUKS /dev/mapper/* names. It checked that
single path against the mounted file systems found from /proc/mounts,
expanded with additional block device names when symlinks were
encountered.
[3] GParted_Core::set_mountpoints() -> set_mountpoints_helper()
[4] GParted_Core::set_device_partitions() -> is_busy()
GParted_Core::set_device_one_partition() -> is_busy()
GParted_Core::set_luks_partition() -> is_busy()
Having the first path, by sort order, treated specially by being used
everywhere and virtually ignoring the others was wrong, complicated to
remember and difficult code with. As all the additional paths were
virtually unused and made no difference, remove them. The "improved
detection of mountpoins, free space, etc.." benefit from commit [5]
doesn't seem to exist. Therefore simplify to a single path for Device
and Partition objects.
[5] commit 6d8b169e73
changed the way devices and partitions store their device paths.
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..
This patch
Simplify the Device object from a vector of paths to a single path.
Remove add_paths() and get_paths() methods. Keep add_path() and
get_path() for now.
Bug 767842 - File system usage missing when tools report alternate block
device names
Recognise GRUB2 core.img boot code written to a partition without a file
system. Such setups are possible/likely with GPT partitioned disks as
there is a specific partition type reserved for it [1][2]:
21686148-6449-6E6F-744E-656564454649 (BIOS Boot partition)
[1] GUID Partition Table, Partition types
https://en.wikipedia.org/wiki/GUID_Partition_Table#Partition_type_GUIDs
[2] BIOS boot partition
https://en.wikipedia.org/wiki/BIOS_boot_partition
Bug 766989 - zfsonline support - need file system name support for ZFS
type codes
Composing these operations caused GParted to abort on an assert failure:
(1) Delete an existing partition,
(2) Create a new partition,
(3) Delete new partition.
This is the equivalent issue as fixed in the previous commit, except with
the delete operation rather than the check operation:
Prevent assert failure from OperationCheck::get_partition_new() (#767233)
# ./gpartedbin
======================
libparted : 2.4
======================
**
ERROR:OperationDelete.cc:41:virtual GParted::Partition& GParted::OperationDelete::get_partition_new(): assertion failed: (false)
Aborted (core dumped)
# gdb ./gpartedbin core.19232 --batch --quiet --ex backtrace -ex quit
[New Thread 19232]
[New Thread 19234]
[Thread debugging using libthread_db enabled]
Core was generated by `./gpartedbin'.
Program terminated with signal 6, Aborted.
#0 0x000000361f2325e5 in raise (sig=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
64 return INLINE_SYSCALL (tgkill, 3, pid, selftid, sig);
#0 0x000000361f2325e5 in raise (sig=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
#1 0x000000361f233dc5 in abort () at abort.c:92
#2 0x0000003620a67324 in g_assertion_message (domain=<value optimized out>, file=<value optimized out>, line=<value optimized out>, func=0x50fcc0 "virtual GParted::Partition& GParted::OperationDelete::get_partition_new()", message=0x1b55f60 "assertion failed: (false)") at gtestutils.c:1358
#3 0x0000003620a678f0 in g_assertion_message_expr (domain=0x0, file=0x50fa68 "OperationDelete.cc", line=41, func=0x50fcc0 "virtual GParted::Partition& GParted::OperationDelete::get_partition_new()", expr=<value optimized out>) at gtestutils.c:1369
#4 0x000000000049aa0d in GParted::OperationDelete::get_partition_new (this=0x1b321b0) at OperationDelete.cc:41
#5 0x00000000004c6700 in GParted::Win_GParted::activate_delete (this=0x7ffc91403670) at Win_GParted.cc:2068
...
As before the crash is happened in Win_GParted::activate_delete() as it
was going through the list of operations removing those which applied to
the never created partition. It came across the delete operation of an
existing partition and called get_partition_new(). As partition_new was
not set or used by the delete operation this asserted false and crashed
GParted.
Unlike the check operation case, the delete operation doesn't have a
partition afterwards. (As GParted represents unallocated space with
partition objects then the delete operation could be populated with a
new partition by constructing the correctly merged unallocated space
partition object, but that is what OperationDelete::apply_to_visual()
does and having a place holder doesn't seem like the right thing to do).
Instead exclude delete operations, on existing partitions, when looking
for operations applying to this not yet created partition as they are
mutually exclusive.
Bug 767233 - GParted core dump on assert failure in
OperationDelete::get_partition_new()
Composing these operations caused GParted to abort on an assert failure:
(1) Check an existing partition,
(2) Create a new partition,
(3) Delete new partition.
# ./gpartedbin
======================
libparted : 2.4
======================
**
ERROR:OperationCheck.cc:40:virtual GParted::Partition& GParted::OperationCheck::get_partition_new(): assertion failed: (false)
Aborted (core dumped)
# gdb ./gpartedbin core.8876 --batch --quiet --ex backtrace -ex quit
[New Thread 8876]
[New Thread 8879]
[Thread debugging using libthread_db enabled]
Core was generated by `./gpartedbin'.
Program terminated with signal 6, Aborted.
#0 0x000000361f2325e5 in raise (sig=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
64 return INLINE_SYSCALL (tgkill, 3, pid, selftid, sig);
#0 0x000000361f2325e5 in raise (sig=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
#1 0x000000361f233dc5 in abort () at abort.c:92
#2 0x0000003620a67324 in g_assertion_message (domain=<value optimized out>, file=<value optimized out>, line=<value optimized out>, func=0x50f400 "virtual GParted::Partition& GParted::OperationCheck::get_partition_new()", message=0x1d37a00 "assertion failed: (false)") at gtestutils.c:1358
#3 0x0000003620a678f0 in g_assertion_message_expr (domain=0x0, file=0x50f1a8 "OperationCheck.cc", line=40, func=0x50f400 "virtual GParted::Partition& GParted::OperationCheck::get_partition_new()", expr=<value optimized out>) at gtestutils.c:1369
#4 0x0000000000498e21 in GParted::OperationCheck::get_partition_new (this=0x1d1bb30) at OperationCheck.cc:40
#5 0x00000000004c66ec in GParted::Win_GParted::activate_delete (this=0x7fff031c3e30) at Win_GParted.cc:2068
...
When Win_GParted::activate_delete() was stepping through the operation
list removing operations (2 & 3 in the above recreation steps) which
related to the new partition never to be created it called
get_partition_new() on all operations in the list. This included
calling get_partition_new() on the check operation (1 in the above
recreation steps). As partition_new was not set or used by the check
operation get_partition_new() asserted false and crashed GParted.
Fix by populating the partition_new member in OperationCheck objects,
thus allowing get_partition_new() to be called on the object. As a
check operation doesn't change any partition boundaries or file system
attributes, just duplicate the new partition from the original
partition.
Bug 767233 - GParted core dump on assert failure in
OperationDelete::get_partition_new()
E2fsprogs 1.42 adds ext4 64bit feature [1] allowing volume sizes larger
than 16 TiB. However only enable large volumes from e2fsprogs 1.42.9
when a large number of 64bit bugs were fixed [2]. (Also RHEL / CentOS 7
use e2fsprogs 1.42.9 and always enable 64bit feature by default).
[1] Release notes, E2fsprogs 1.42 (November 29, 2011)
http://e2fsprogs.sourceforge.net/e2fsprogs-release.html#1.42
"This release of e2fsprogs has support for file systems > 16TB.
Online resize requires kernel support which will hopefully be in
Linux version 3.2. Offline support is not yet available for > 16TB
file systems, but will be coming".
[2] Release notes, E2fsprogs 1.42.9 (December 28, 2013)
http://e2fsprogs.sourceforge.net/e2fsprogs-release.html#1.42.9
"Fixed a large number of bugs in resize2fs, e2fsck, debugfs, and
libext2fs to correctly handle bigalloc and 64-bit file systems.
There were many corner cases that had not been noticed in previous
uses of these file systems, since they are not as common. Some of
the bugs could cause file system corruption or data loss, so users
of 64-bit or bigalloc file systems are strongly urged to upgrade to
e2fsprogs 1.42.9".
Bug 766910 - Multiple boot loaders don't work on 64bit EXT4 file systems
Calling libparted ped_geometry_new() creates a new PedGeometry object
from malloced memory, however the corresponding ped_geometry_destroy()
is never called to destroy the object and free the memory.
Perform a resize of a FAT file system when running GParted under
valgrind identifies several memory blocks leaked via ped_geometry_new()
from resize_move_filesystem_using_libparted(). One such example:
# valgrind --track-origins=yes --leak-check=full ./gpartedbin
...
==32069== 32 bytes in 1 blocks are definitely lost in loss record 5,419 of 11,542
==32069== at 0x4C29BFD: malloc (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so)
==32069== by 0x8ECD8C5: ped_malloc (libparted.c:231)
==32069== by 0x8ED23C1: ped_geometry_new (geom.c:79)
==32069== by 0x4764F3: GParted::GParted_Core::resize_move_filesystem_using_libparted(GParted::Partition const&, GParted::Partition const&, GParted::OperationDetail&) (GParted_Core.cc:2666)
==32069== by 0x478007: GParted::GParted_Core::resize_filesystem(GParted::Partition const&, GParted::Partition const&, GParted::OperationDetail&, bool) (GParted_Core.cc:2990)
==32069== by 0x478440: GParted::GParted_Core::maximize_filesystem(GParted::Partition const&, GParted::OperationDetail&) (GParted_Core.cc:3037)
==32069== by 0x4769A0: GParted::GParted_Core::resize(GParted::Partition const&, GParted::Partition const&, GParted::OperationDetail&) (GParted_Core.cc:2746)
==32069== by 0x47582B: GParted::GParted_Core::resize_move(GParted::Partition const&, GParted::Partition&, GParted::OperationDetail&) (GParted_Core.cc:2457)
==32069== by 0x46DDB2: GParted::GParted_Core::apply_operation_to_disk(GParted::Operation*) (GParted_Core.cc:767)
...
There is also a leak of a PedGeometry object from
resize_move_partition(). Fix by calling ped_geometry_destroy() to
delete all the allocated PedGeometry objects and free the memory.
Bug 767009 - PedGeometry objects are memory leaked
When replacing the list of paths for the other partition object involved
in either a Resize/Move or Format operation in apply_operation_to_disk()
should replace the whole list of partitions not just replace with the
first path. Copy the whole path list is the correct action. It makes
no material difference because secondary partition paths are only used
to discover mount points during refresh phase and not at the apply
phase, where only the primary path is used.
Bug 766349 - Resolve code ugliness with partition path getting set to
"copy of /dev/SRC"
Quoting the relevant comments from GParted_Core::calibrate_partition():
Re-add the real partition path from libparted.
When creating a copy operation by pasting into unallocated space the
list of paths for the partition object was set to
["Copy of /dev/SRC"] because the partition didn't yet exist before
the operations were applied. Additional operations on that new
partition also got the list of paths set to ["Copy of /dev/SRC"].
This re-adds the real path to the start of the list making it
["/dev/NEW", "Copy of /dev/SRC"]. This provides the real path for
file system specific tools used during those additional operations
such mkfs for the format operation or fsck and others for the
resize/move operation.
FIXME: Having this work just because "/dev/NEW" happens to sort
before "Copy of /dev/SRC" is ugly! Probably have a separate display
path which can be changed at will without affecting the list of real
paths for the partition.
Having a separate display path is overly complicated and unnecessary.
Just replace the list of paths with the real one reported by libparted
if it contained "Copy of /dev/SRC", determined by checking if the file
exists. Otherwise continue to add the libparted name as an alternate
path. Whole disk devices can never be named "Copy of /dev/SRC" because
they are not partitioned so never created or deleted by GParted, only
ever written to, hence don't need the extra exists test logic.
Bug 766349 - Resolve code ugliness with partition path getting set to
"copy of /dev/SRC"
When composing a copy operation it always named the destination
partition as "copy of /dev/SRC". For the case of pasting into
unallocated space creating a new partition this was the right thing to
do as the partition doesn't yet exist so the path is not yet known.
However for the case of pasting into an existing partition the path is
known and replacing it with "copy of /dev/SRC" is wrong. No other
operation when operating on an existing partition changes it path.
Given a set of existing partitions, sdb1 to sdb4, compose a set of copy
operations as: copy sdb1 to sdb2, copy sdb2 to sdb3 and copy sdb3 to
sdb4. The displayed partitions before being applied become:
/dev/sdb1
copy of /dev/sdb1
copy of copy of /dev/sdb1
copy of copy of copy of /dev/sdb1
And the pending operations are named:
Copy /dev/sdb1 to /dev/sdb2
Copy copy of /dev/sdb1 to /dev/sdb3
Copy copy of copy of /dev/sdb1 to /sev/sdb4
This is perverse. In the case of pasting into an existing partition
keep the real path name. This keeps the partitions being displayed as:
/dev/sdb1
/dev/sdb2
/dev/sdb3
/dev/sdb4
And the pending operations named as:
Copy /dev/sdb1 to /dev/sdb2
Copy /dev/sdb2 to /dev/sdb3
Copy /dev/sdb3 to /dev/sdb4
Much more understandable.
Also switch to an upper case "C" in "Copy of /dev/SRC" as the temporary
path name when pasting into unallocated space. Finally update the
comment in calibrate_partition() to describe the remaining cases when
re-adding the path is still required.
Bug 766349 - Resolve code ugliness with partition path getting set to
"copy of /dev/SRC"
Mike Fleetwood