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guestfs-release-notes.txt
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guestfs-release-notes.txt
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NAME
guestfs-release-notes - libguestfs Release Notes
RELEASE NOTES FOR LIBGUESTFS 1.24
These release notes only cover the differences from the previous
stable/dev branch split (1.22.0). For detailed changelogs, please see
the git repository, or the ChangeLog file distributed in the tarball.
New features
User-Mode Linux (UML) can be used as an alternative backend (ie.
instead of KVM). This improves performance especially when using
libguestfs inside a VM (eg. in the cloud). UML is supported as a
first-class backend. See "USER-MODE LINUX BACKEND" in guestfs(3) for
how to use this.
ARM (32 bit) and PPC64 are now fully supported.
Tools
virt-builder(1) is a new tool for rapidly building virtual machine
images. It is far more secure than other approaches, and allows
flexible configuration of the images.
New virt-sysprep(1) operations: Remove files in /tmp and /var/tmp.
Remove RPM database files. Change root and user passwords. More log
files are removed. New operations which are not enabled by default:
Create random UUIDs for filesystems. Reset firewall rules. (Wanlong
Gao)
virt-resize(1) and virt-sysprep can now use URIs to specify a remote
disk.
Use guestfish -N filename=type to create a named disk image (instead of
the default test1.img etc).
virt-sparsify(1) now tests if there is enough disk space to complete
the operation, instead of possibly running out of space half way
through.
virt-format(1) and virt-make-fs(1): new --label option for setting
filesystem label.
Language bindings
New bindings for the Go programming language.
API
Support for the systemd journal.
guestfs_add_drive_opts can now control the qemu caching mode through a
new cachemode parameter. You can select improved performance for
temporary drives, or safety.
guestfs_set_label now works for XFS and btrfs.
Inspection
Better inspection of SUSE guests (Olaf Hering).
Better support for non-standard Windows %systemroot% (Matthew Booth).
Enhanced error reporting for Augeas errors.
Other
Security
CVE-2013-2124
https://bugzilla.redhat.com/show_bug.cgi?id=968306
A denial of service was possible when inspecting certain guests. The
fix has been backported to 1.20 and 1.22 branches.
New APIs
add-drive-scratch: Add a temporary scratch drive
aug-label
aug-setm
journal-open: Systemd journal support
journal-close
journal-next
journal-skip
journal-get
journal-get-data-threshold
journal-set-data-threshold
remount: Allow rw flag to be adjusted on mounted filesystems
set-uuid: Set UUID of filesystem
is-file, is-dir, is-blockdev, is-chardev, is-fifo, is-socket APIs now
have an extra followsymlinks flag.
add-drive has a new cachemode parameter.
Build changes
The following packages are required to build libguestfs 1.24:
Augeas ≥ 1.0.0
The following optional packages may be added to enhance functionality
but are not required:
sd-journal
To read journal files from guests which use that.
url_mkcow
For UML backend.
curl
gpg
xz
nbdkit
For virt-builder.
golang ≥ 1.1.1
For Go language bindings.
Internals
New make check-* rules replace make extra-tests. See make help and
guestfs(3) for details.
Perl code can now be valgrinded.
Inspection code is now fuzz-tested.
make no longer recurses into the generator directory in every other
directory. This reduces the overhead of builds considerably.
Additional tests for Augeas, hivex.
Add a timeout (4 hours) to all tests so we can catch the case where
qemu or other components hang.
Use kvmclock and -cpu host. This improves clock stability and overall
performance.
./configure --enable-packet-dump mode is fixed.
./configure --enable-valgrind-daemon mode has been rewritten. It is now
feasible for developers to keep this flag enabled at all times.
Backends have been refactored to be modular (although they are not
actually loadable modules).
Bugs fixed
https://bugzilla.redhat.com/1002032
mke2fs can't return the correct filesystem type when blockscount is
less than 2048 for ext3
https://bugzilla.redhat.com/1001876
Update "rsync-out" helpout for using wildcard
https://bugzilla.redhat.com/1001875
Argument 'excludes' of tar-out does not work
https://bugzilla.redhat.com/1000428
virt-format uses wrong partition type for vfat filesystems
https://bugzilla.redhat.com/1000121
'sh' command before mount causes daemon to segfault
https://bugzilla.redhat.com/998513
guestfish does not work when you mix --remote and --add options
https://bugzilla.redhat.com/998482
guestfish remote prints "libguestfs: error: waitpid (qemu): No child
processes"
https://bugzilla.redhat.com/995711
list-filesystems command fails if there are no block devices
https://bugzilla.redhat.com/994517
cache=none/O_DIRECT workaround doesn't work for images with backing
files
https://bugzilla.redhat.com/989356
cap-get-file will return error if the file has not be set
capabilities
https://bugzilla.redhat.com/986877
RFE: Implement set-uuid command
https://bugzilla.redhat.com/986875
RFE: Implement set-label for xfs
https://bugzilla.redhat.com/985269
Can't set acl value for a specified user with 'acl-set-file'
https://bugzilla.redhat.com/983218
libguestfs double free when kernel link fails during launch
https://bugzilla.redhat.com/981715
Make xfs filesystem failed with specified blocksize, gives "unknown
option -b" error
https://bugzilla.redhat.com/981683
"hivex-commit" should fail with a relative path
https://bugzilla.redhat.com/981663
disk-format "qemu-img info: JSON parse error" when target file does
not exist
https://bugzilla.redhat.com/978302
mke2fs-J should give a meaningful error when specified type is
anything except 'ext{2,3,4}'
https://bugzilla.redhat.com/975797
Specifying virtio interface ('iface' parameter) breaks the direct
backend - libguestfs hangs
https://bugzilla.redhat.com/975753
"virt-resize --expand" and "virt-resize --resize" outputs error
message for Win2008 32bit OS
https://bugzilla.redhat.com/975412
inspection: Augeas expressions are broken with augeas >= 0.10
https://bugzilla.redhat.com/974904
virt-resize --expand fails on Ubuntu Cloud Image
https://bugzilla.redhat.com/974489
Regression: Fedora inspection broken by change from guestfs_exists to
guestfs_is_file
https://bugzilla.redhat.com/972775
txz-out command produces a bzip2-compressed file (should be
xz-compressed)
https://bugzilla.redhat.com/969845
upload to a directory occasionally hangs instead of failing
https://bugzilla.redhat.com/968875
virt-sysprep should support URL-type arguments
RELEASE NOTES FOR LIBGUESTFS 1.22
These release notes only cover the differences from the previous
stable/dev branch split (1.20.0). For detailed changelogs, please see
the git repository, or the ChangeLog file distributed in the tarball.
New features
API
Remote access to disks:
* Network Block Device (nbd)
* Secure Shell (ssh)
* HTTP and HTTPS
* FTP and FTPS
* iSCSI
* Gluster
* Ceph/rbd (Mike Kelly)
* Sheepdog
* TFTP
The SYSLINUX and EXTLINUX bootloaders can now be installed in disk
images using the API.
Inspection can now handle filesystems such as btrfs where subvolumes
are separately mountable (Matthew Booth).
"Attach methods" are now known as "backends". Compatibility with
existing code is preserved.
Filenames can contain ':', as long as newer QEMU is being used.
Tools
Virt-alignment-scan and virt-df scan multiple guests in parallel.
Guestmount now passes errno accurately back to userspace in almost all
cases.
Guestfish and other tools can now use a URI-like syntax to access
remote disks, eg:
guestfish -a ssh://example.com/path/to/disk.img
Guestfish and guestmount now allow you to specify the filesystem type
when mounting, which is more secure (Dave Vasilevsky).
Guestfish is now the "guest filesystem shell".
Guestfish allows only 1 true t yes y on 0 false f no n off for boolean
values (case insensitive), and gives an error for all other strings.
New tool guestunmount for unmounting FUSE filesystems safely.
guestmount --no-fork flag prevents guestmount from daemonizing.
Virt-resize now uses sparse copies by default, saving considerable
space for guests which are mostly empty.
Bash tab completion has been rewritten and can now handle most tools,
and correctly tab-complete --long options. In addition, bash completion
scripts are loaded on demand.
Language bindings
The Java API now supports events.
The Python object now inherits from the object base class.
Python methods which previously returned lists of tuples can now be
made to return a Python dict. For backwards compatibility, you have to
enable this by using the constructor option guestfs.GuestFS
(python_return_dict=True).
The PHP bindings are now tested properly, and have had multiple fixes.
The long-deprecated Perl Sys::Guestfs::Lib library has been removed.
https://www.redhat.com/archives/libguestfs/2013-April/msg00001.html
Examples
New example program showing how to enable debugging and capture log
messages.
Other
Distributors can add arbitrary extra packages to the appliance by
doing:
./configure --with-extra-packages="list of package names"
Distributors can use:
./configure --with-supermin-extra-options="..."
to add arbitrary extra options to supermin.
Security
No security issues were found in this release.
New APIs
cp-r
extlinux
feature-available
get-program
is-whole-device
part-get-gpt-type
part-set-gpt-type
rename
set-program
syslinux
C only:
guestfs_event_to_string
Internals
The febootstrap tool has now been renamed to "supermin". Libguestfs can
use either, but now prefers "supermin".
http://people.redhat.com/~rjones/supermin/
libxml2 is required to build libguestfs.
The hivexregedit program (from hivex) is required to build from git.
Internal functions can no longer be used unless the caller defines
-DGUESTFS_PRIVATE=1.
Enable C compiler warnings in Python, Ruby bindings.
Fail early and clearly if libvirt does not support qemu/KVM (eg. if
default libvirt connection is to Xen).
make print-subdirs rule, useful for selectively running tests.
Multiple fixes to allow separated (sourcedir != builddir) builds.
Multiple fixes to Haskell bindings.
ln and ln-f APIs now capture errno correctly.
Language binding tests use (mostly) a standard numbering scheme and aim
to test the same range of features in each language. Also the number of
launches required has been reduced so these tests should run much more
quickly.
Library code internally uses GCC __attribute__((cleanup)) (if
available) to simplify memory allocation.
Internal header files have been reorganized. See the comments in
src/guestfs-internal*.h
Internal code shared between the library and certain tools is now
located in a static libutils library.
Almost all subdirectories can now use parallel builds, although note
that the top-level directories still build in series.
Use of PATH_MAX and NAME_MAX has been eliminated from the code.
The Java API now requires JVM ≥ 1.6.
Force use of serial-tests with automake ≥ 1.12.
Use of sockets in the library protocol layer is abstracted, allowing
other non-POSIX layers to be added in future (see src/conn-socket.c).
qemu-img info --output json is used if available, for more secure
parsing of the output of this command.
Distros can now use make INSTALLDIRS=vendor install to place Ruby
bindings in vendordir. This eliminates a non-upstream patch carried by
both Fedora and Debian.
Valgrind log files are now written to tmp/valgrind-DATE-PID.log
make clean cleans the local tmp/ directory.
The C API tests have been rewritten using a more flexible generator
language that allows arbitrary C code to be executing during tests.
Bugs fixed
https://bugzilla.redhat.com/961812
Segfault in inspect-fs.c in mountable code
https://bugzilla.redhat.com/957772
tar-out and base64-out quoting error
https://bugzilla.redhat.com/957380
libguestfs: error: btrfsvol:/dev/sda2/root: root device not found:
only call this function with a root device previously returned by
guestfs_inspect_os
https://bugzilla.redhat.com/948324
inspection fails if libosinfo is not installed
https://bugzilla.redhat.com/928995
file on zero-sized file now produces "empty " instead of "empty"
https://bugzilla.redhat.com/921292
qemu: could not open disk image /tmp/.../snapshot1: Permission denied
https://bugzilla.redhat.com/921040
"error: external command failed, see earlier error messages" message
needs to change
https://bugzilla.redhat.com/920225
libguestfs should use --output json (if supported) to safely parse
the output of qemu-img command
https://bugzilla.redhat.com/916780
feature request: guestmount --with-cleanup-pipefd
https://bugzilla.redhat.com/914934
oom-killer kills guestfsd when tar-in a lot of data
https://bugzilla.redhat.com/914931
FileIn commands cause segfault if appliance dies during the file copy
in
https://bugzilla.redhat.com/913145
Misc leaks in virNetClientProgramCall in libvirt 1.0.2
https://bugzilla.redhat.com/912499
Security context on image file gets reset
https://bugzilla.redhat.com/909836
libguestfs-test-tool --qemu segfaults
https://bugzilla.redhat.com/909624
Unexpected non-tail recursion in recv_from_daemon results in stack
overflow in very long-running API calls that send progress messages
https://bugzilla.redhat.com/908322
virt-tar fails on non-existent directory names "error in chunked
encoding at /home/rjones/d/libguestfs/tools/virt-tar line 272."
https://bugzilla.redhat.com/908321
virt-cat fails on directory names "/dev/stdout: error in chunked
encoding"
https://bugzilla.redhat.com/907554
btrfs causes subsequent ntfs-3g filesystem to fail
https://bugzilla.redhat.com/905341
"No such file or directory" when execute "hivex-commit"
https://bugzilla.redhat.com/903620
btrfs_subvolume_list broken due to change in subvolume list output
https://bugzilla.redhat.com/895910
guestmount: rename() incorrectly follows symbolic links
https://bugzilla.redhat.com/895905
guestmount: link() incorrectly returns ENOENT, when it should be
EXDEV
https://bugzilla.redhat.com/895904
checksums-out fail to compute the checksums of all regular files in
directory
https://bugzilla.redhat.com/894545
libguestfs FTBFS on Fedora 19 because of new ruby
https://bugzilla.redhat.com/890027
virt-sysprep: Setting hostname, domain name and pretty name on Fedora
18 correctly
https://bugzilla.redhat.com/887971
pvcreate fails if partition contains a swap signature
https://bugzilla.redhat.com/887520
zero_free_space: open: /sysroot//ujqqq135.rd3: Cannot allocate memory
https://bugzilla.redhat.com/886915
libguestfs with libvirt attach-method fails with odd error if default
hypervisor is Xen
https://bugzilla.redhat.com/847549
Addng a zero-length virtio-scsi disk causes: qemu-kvm:
hw/scsi-bus.c:1568: scsi_req_complete: Assertion `req->status == -1'
failed.
https://bugzilla.redhat.com/811649
libguestfs cannot open disk images which are symlinks to files that
contain ':' (colon) character
https://bugzilla.redhat.com/664558
RFE: Allow to set log callback in Ruby bindings
RELEASE NOTES FOR LIBGUESTFS 1.20
These release notes only cover the differences from the previous
stable/dev branch split (1.18.0). For detailed changelogs, please see
the git repository, or the ChangeLog file distributed in the tarball.
New features
libvirt and sVirt (SELinux confinement)
You can optionally use libvirt to launch and manage the backend
appliance by:
* setting LIBGUESTFS_ATTACH_METHOD=libvirt[:URI]
* using ./configure --with-default-attach-method=libvirt[:URI]
* or calling the API method guestfs_set_attach_method
SVirt (SELinux confinement) is used to secure the libguestfs appliance,
if the libvirt backend is selected.
virtio-scsi, larger number of drives, hotplugging
Virtio-scsi is now used by default, if it is available. This greatly
increases the number of drives that can be added to a single libguestfs
handle (up to 255).
You can now hotplug drives (add and remove drives after launch).
Libguestfs can now handle > 25 disks, in all APIs, tools and tests.
You can label drives when adding them, then refer to them by label
(/dev/disk/guestfs/LABEL) instead of having to use device names
(/dev/sda).
new library features
POSIX Access Control Lists (ACLs) and Linux filesystem capabilities can
now be read and written through the API.
Windows Dynamic Disks are now supported. The metadata can only be read
(volumes cannot be modified or created). However the data/filesystems
in the volumes themselves can be mounted, read and written (Matthew
Booth).
Hivex (Windows Registry editing) is now directly supported through the
API, making reading or editing the Windows Registry much more
efficient.
Several libguestfs APIs were reimplemented so they no longer have any
limits on output. The reimplemented APIs are: guestfs_cat,
guestfs_find, guestfs_read_file, guestfs_read_lines, guestfs_write,
guestfs_write_append, guestfs_lstatlist, guestfs_lxattrlist,
guestfs_readlinklist, guestfs_ls.
virt tools
guestfish touch 'win:c:\new_file' now works as expected.
guestfish has a new --network option, which enables the user network in
libguestfs.
You can set GUESTFISH_PS1 to use fancy prompts in guestfish.
rsync, ssh, less and lrzip commands are now available in virt-rescue.
In addition, rsync can be used through the API for doing incremental
copies.
virt-sparsify uses qcow2 v3 for increased efficiency.
virt-sysprep enhancements:
* generate new UUIDs for PVs and VGs
* remove the local machine ID (Wanlong Gao)
* remove ABRT data (Wanlong Gao)
* remove puppet keys and log files (Wanlong Gao)
* remove process accounting files (Wanlong Gao)
* new --firstboot parameter allowing firstboot scripts for
customizing guests
* remove HOSTNAME field from ifcfg-eth* files (Wanlong Gao)
* miscellaneous improvements for SuSE (Olaf Hering)
* remove man pages cache (Wanlong Gao)
* remove crash data generated by kexec-tools (Wanlong Gao)
virt-make-fs can now create virtual floppy disks (VFDs).
guestmount has a --pid-file option, which can be used to avoid a race
condition between unmounting the filesystem and using the underlying
disk image.
language bindings
Full-featured Lua bindings have been added in this release (thanks to
Jerome Vuarand for many suggestions).
In Ruby, optional arguments hash is optional.
In Python, optional arguments now don't use special "sentinel" values,
so any integer can be passed as an optional argument.
Erlang bindings now come with examples and tests.
Erlang bindings now handle 64 bit integer parameters correctly.
The automated 'bindtests' now test for 64 bit cleanliness in parameter
passing. Several bugs in the bindings were found and fixed as a result.
Better handling of blocking and non-blocking functions should make
libguestfs calls more efficient.
inspection
Windows guests with unlimited-sized Registries are now supported. By
adding the hivex API to the libguestfs API, it is much more efficient
and easier to inspect and modify the Windows Registry in guests.
Better support for SuSE guests (Olaf Hering).
Return the architecture of installed applications (John Eckersberg).
Windows 8 is now supported.
Fedora 18 is now supported.
Inspection of ISOs/CDs/DVDs can now use the libosinfo database.
ports
Libguestfs without the appliance can be compiled on Mac OS X (Masami
HIRATA).
RHEL 5 is now explicitly supported through the 'oldlinux' branch in
upstream git.
PowerPC 64 bit is now supported. Also libguestfs has been examined for
endianness bugs and these have been fixed.
daemon
A man page for the daemon (guestfsd(8)) is included.
Security
guestfish history file
The $HOME/.guestfish history file is now created with 0600 permissions
(instead of 0644 before) so it is no longer world readable.
CVE-2012-2690
Old versions of both virt-edit and the guestfish edit command created a
new file containing the changes but did not set the permissions, etc of
the new file to match the old one. The result of this was that if you
edited a security sensitive file such as /etc/shadow then it would be
left world-readable after the edit.
This issue was assigned CVE-2012-2690, and is fixed in libguestfs ≥
1.16.
For further information, see
https://bugzilla.redhat.com/show_bug.cgi?id=788642
New APIs
acl-delete-def-file
acl-get-file
acl-set-file
canonical-device-name
cap-get-file
cap-set-file
create-flags
device-index
disk-has-backing-file
disk-format
disk-virtual-size
filesystem-available
fill-dir
fstrim
get-cachedir
get-libvirt-requested-credentials
get-libvirt-requested-credential-prompt
get-libvirt-requested-credential-challenge
get-libvirt-requested-credential-defresult
get-tmpdir
hivex-close
hivex-commit
hivex-node-add-child
hivex-node-children
hivex-node-delete-child
hivex-node-get-child
hivex-node-get-value
hivex-node-name
hivex-node-parent
hivex-node-set-value
hivex-node-values
hivex-open
hivex-root
hivex-value-key
hivex-value-type
hivex-value-utf8
hivex-value-value
inspect-list-applications2 (John Eckersberg)
list-ldm-volumes
list-ldm-partitions
ldmtool-create-all
ldmtool-diskgroup-disks
ldmtool-diskgroup-name
ldmtool-diskgroup-volumes
ldmtool-remove-all
ldmtool-scan
ldmtool-scan-devices
ldmtool-volume-hint
ldmtool-volume-partitions
ldmtool-volume-type
ls0
max-disks
mke2fs (Wanlong Gao)
mklost-and-found
mkswap [added label and uuid optional arguments]
mktemp (Wanlong Gao)
nr-devices
parse-environment
parse-environment-list
rm-f
rsync
rsync-in
rsync-out
set-cachedir
set-libvirt-supported-credentials
set-libvirt-requested-credential
set-tmpdir
shutdown [backported to 1.16 and 1.18]
tar-in [added compress flag]
tar-out [added compress, numericowner, excludes flags]
umount [added force and lazy optional arguments]
utsname
xfs-admin (Wanlong Gao)
xfs-growfs (Wanlong Gao)
xfs-info (Wanlong Gao)
xfs-repair (Wanlong Gao)
In the C API only:
guestfs_push_error_handler
guestfs_pop_error_handler
Internals
qemu ≥ 1.1 is required (≥ 1.2 preferred).
febootstrap ≥ 3.20 is required.
libvirt is optional, but if you want to use the new libvirt backend for
launching the appliance then libvirt ≥ 0.10.2 would be required.
Coverity has been run over the complete codebase, and many issues fixed
(thanks Ondrej Vasik, Kamil Dudka).
Functions which previously had no optargs can now be converted to ones
with optargs, making extending the API much more flexible. Source and
binary backwards compatibility is preserved for users of the API.
The way that libguestfs APIs and structures are represented in the
generator has changed to use an OCaml struct instead of a tuple. This
makes generator descriptions more flexible and easier to understand.
For details see commits 39d1a7db and eb185eef.
Separation of the library code into more files:
* Launch backends are now located in separate files eg.
src/launch-appliance.c, src/launch-libvirt.c.
* Generated action code is now split over several src/action*.c
files, for faster compilation.
* The huge src/guestfs.c file is now split into smaller logical
units.
POD (documentation) is now generated using a rewritten Perl program
instead of pod2* + shell scripts.
Man pages now contain stable dates (Hilko Bengen).
Skipped tests now exit with code 77, so they appear as SKIP: in make
check output.
The parallel mount-local test has been rewritten in C (RHBZ#838081).
Ruby 1.8.5 is now supported (though Ruby ≥ 1.9 is preferred).
Perl bindings can be disabled via ./configure --disable-perl (Wulf C.
Krueger). Note that Perl is still required in order to build
libguestfs.
Java bindings are now enabled/disabled using ./configure --with-java or
./configure --without-java (Wulf C. Krueger).
New configure options ./configure --enable-code-profiling and
./configure --enable-code-coverage.
Multiple fixes to use of 64 bit integers in language bindings.
The appliance backend now uses sgabios instead of vgabios (Dan
Berrange).
The ./run script now sets enough environment variables that you can run
OCaml, Python, Ruby, Java, GJS, Erlang, Lua programs.
./run --test flag for running tests with minimal output. It also prints
the time taken to run each test.
The ./run script now builds up paths cumulatively, meaning that you can
use ./run twice, or use the libguestfs and libvirt ./run scripts
together.
You can extract a list of external commands required by the daemon,
making building the appliance on certain distros easier (Olaf Hering).
The virt-rescue command is now tested during make check.
The generator now removes unused generated files. This helps when going
back and forth with git rebase, git bisect, etc.
Tests now run in a separate toplevel tmp/ directory in the source. This
allows the directory to be labelled for SELinux (sVirt), and also makes
it easier to clean up.
make syntax-check now works to a greater extent, and many problems in
the main code that were found by syntax-check have been fixed (thanks
Jim Meyering).
Emacs mode (-*- foo -*-) has been added to generated files.
Progress bar output is now sent to /dev/tty so it doesn't end up in the
regular output of the program. virt-resize and virt-sparsify now
suppress progress bars if stdout is not a tty.
There is now a ./configure --without-libvirt option. This is useful for
testing that the code still compiles without libvirt.
There is now an internal mini-library for running commands. This allows
us to redirect errors from external commands into events.
Code for handling temporary directories and the appliance cache was
completely overhauled.
Code for temporarily ignoring/disabling errors now looks like this:
guestfs_push_error_handler (g, NULL, NULL);
guestfs_mkdir (g, "/foo"); /* We don't care if this fails. */
guestfs_pop_error_handler (g);
The tests/extra directory has gone. The "extra tests" are now split
into separately runnable targets, such as make check-valgrind. Use make
help to get a summary of the targets.
The lpj option is passed to the appliance kernel when using TCG. This
should improve clock stability (thanks Marcelo Tosatti, Olaf Hering).
Bugs fixed
https://bugzilla.redhat.com/882417
libguestfs tools fail with odd error messages if TMPDIR is not an
absolute path
https://bugzilla.redhat.com/882299
Windows 8 guest disks can't be mounted: "The NTFS partition is in an
unsafe state. Please resume and shutdown Windows fully (no
hibernation or fast restarting), or mount the volume read-only with
the 'ro' mount option."
https://bugzilla.redhat.com/881953
libguestfs: migration to /etc/hostname, /etc/vconsole.conf,
/etc/locale.conf
https://bugzilla.redhat.com/880801
virt-df with two -a options displays incorrect disk image name