qemuDomainRemoveDiskDevice would leak the disk to be removed if the VM
crashed since it was removed from the definition but not freed.

Broken in commit 105bcdde which moved the removal from the definition
earlier.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

Similarly to how we've intergrated data belonging to a single
virStorageSource for purposes of attaching it to a qemu instance we will
need to agregate data relevant for the whole disk. With blockdev there
will be some disk-wide backing chain members such as the copy-on-read
handler.

Introduce qemuHotplugDiskSourceData which agregates the backing chain
and other data relevant for the disk and functions which generate it
and apply and rollback it.

In addition to disk hotplug this will also be reused for media changing
where we need to exchange the full disk backend.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

The warning messages which include the disk source could potentially
format NULL using %s as virDomainDiskGetSource may return NULL for e.g.
NBD disks. As most of the APIs are NOOP for remote disks the usage of
the source string only should be fine for now.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

Now that there's only one use of it, replace it directly by the code
filling it.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

qemuHotplugPrepareDiskAccess can be used to tear down disk access so we
can replace the open-coded version collecting the same function calls.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

Now that we use only the separate function for creating data for the
'transaction' command we can remove all the boilerplate which was
necessary before.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

Remove the dual mode code which allowed to create snapshots without
support for 'transaction'.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

With 'transaction' support we don't need to keep around the multipurpose
code which would create the snapshot if 'transaction' is not supported.

To simplify this add a new helper that just wraps the arguments for
'blockdev-snapshot-sync' operation in 'transaction' and use it instead
of qemuBlockSnapshotAddLegacy.

Additionally this allows to format the arguments prior to creating the
file for simpler cleanup.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

Add a new helper that will be solely used to create arguments for the
transaction command. Later on this will make it possible to remove the
overloading which was caused by the fact that snapshots were created
without transaction and also will help in blockdevification of snapshots.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

Currently we'd audit that we managed to format the data for the
'transaction' command rather than the (un)successful attempt to create
the snapshot.

Move the auditing code so that it can actually audit the result of the
'transaction' command.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

In the cleanup path we already checked whether a snapshot needed to be
taken by looking into the collected data. Use the same approach when
creating the snapshot command data and when committing the changes to the
domain definition.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

Since we now always do the snapshot via the 'transaction' command we can
drop the code which would enter monitor for individual disk snapshots.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

While qemu supports the 'transaction' command since v1.1.0
(52e7c241ac766406f05fa) and the 'blockdev-snapshot-sync' command since
v0.14.0-rc0 we need to keep the capability bits present since some qemu
downstreams (RHEL/CentOS 7 for example) chose to cripple qemu by
arbitrarily compiling out some stuff which was already present at that
time.

To simplify the crazy code just require both commands to be present at
the beginning of an external snapshot so that we can remove the case when
'transaction' would not be supported.

This also allows to drop any logic connected to the
VIR_DOMAIN_SNAPSHOT_CREATE_ATOMIC flag since snapshots are atomic with
the 'transaction' command.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

This adds some generic virinterfaceobj code, roughly matching what
is used by other stateful drivers like network, storage, etc.
Reviewed-by: NJohn Ferlan <jferlan@redhat.com>
Signed-off-by: NCole Robinson <crobinso@redhat.com>

If a domain is configured to start on boot, it has a symlink to the
domain definition inside the autostart directory. If you rename this
domain, the definition is renamed too. The symlink need to be pointed to
this renamed file. This commit recreates the symlink after renaming the
XML file.

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1594985Signed-off-by: NJulio Faracco <jcfaracco@gmail.com>
Signed-off-by: NErik Skultety <eskultet@redhat.com>

virCopyLastError is intended to be used after last error is set.
However due to virLastErrorObject failures (very unlikely though
as thread local error is allocated on first use) we can have zero
fields in a copy as a result. In particular code field can be set
to VIR_ERR_OK.

In some places (qemu monitor, qemu agent and qemu migaration code
for example) we use copy result as a flag and this leads to bugs.

Let's set OOM-like error in copy in case of virLastErrorObject failures.
Signed-off-by: NNikolay Shirokovskiy <nshirokovskiy@virtuozzo.com>

The test targets result in the qemu-sanlock.conf file being created
when sanlock is enabled, even if QEMU is not enabled. As a result it
never gets cleaned up when distclean is run, breaking distcheck.
Signed-off-by: NDaniel P. Berrangé <berrange@redhat.com>

Historically, we've always enabled an emulated video device every time we
see that graphics should be supported with a guest. With the appearance
of mediated devices which can support QEMU's vfio-display capability,
users might want to use such a device as the only video device.
Therefore introduce a new, effectively a 'disable', type for video
device.
Reviewed-by: NJán Tomko <jtomko@redhat.com>
Signed-off-by: NErik Skultety <eskultet@redhat.com>

Since QEMU 2.12, QEMU understands a new vfio-pci device option 'display'
which can be used to turn on display capabilities on vgpu-enabled
mediated devices, IOW emulated GPU devices like QXL will no longer be
needed with vgpu-enable mdevs.
QEMU defaults to 'auto' for the 'display' attribute, which is not
foolproof, so we need to play it safe here and default to display='off'
if this attribute wasn't provided in the XML explicitly.
Reviewed-by: NJán Tomko <jtomko@redhat.com>
Signed-off-by: NErik Skultety <eskultet@redhat.com>

QEMU 2.12 introduced a new type of display for mediated devices using
vfio-pci backend which allows a mediated device to be used as a VGA
compatible device as an alternative to an emulated video device. QEMU
exposes this feature via a vfio device property 'display' with supported
values 'on/off/auto' (libvirt will default to 'off').

This patch adds the necessary bits to domain config handling in order to
expose this feature. Since there's no convenient way for libvirt to come
up with usable defaults for the display setting, simply because libvirt
is not able to figure out which of the display implementations - dma-buf
which requires OpenGL support vs vfio regions which doesn't need OpenGL
(works with OpenGL enabled too) - the underlying mdev uses.
Reviewed-by: NJán Tomko <jtomko@redhat.com>
Signed-off-by: NErik Skultety <eskultet@redhat.com>

The exit path is the same for both success and failure, so the label
should be called cleanup.
Signed-off-by: NErik Skultety <eskultet@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

A simple helper which will loop through all the graphics elements and
checks whether at least one of them enables OpenGL support, either by
containing <gl enable='yes'/> or being of type 'egl-headless'.
Signed-off-by: NErik Skultety <eskultet@redhat.com>
Acked-by: NMichal Privoznik <mprivozn@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

QEMU 2.12 introduced a new vfio-pci device option 'display=on/off/auto'.
This patch introduces the necessary capability.
Signed-off-by: NErik Skultety <eskultet@redhat.com>
Reviewed-by: NJohn Ferlan <jferlan@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

Since 2.10 QEMU supports a new display type egl-headless which uses the
drm nodes for OpenGL rendering copying back the rendered bits back to
QEMU into a dma-buf which can be accessed by standard "display" apps
like VNC or SPICE. Although this display type can be used on its own,
for any practical use case it makes sense to pair it with either VNC or
SPICE display. The clear benefit of this display is that VNC gains
OpenGL support, which it natively doesn't have, and SPICE gains remote
OpenGL support (native OpenGL support only works locally through a UNIX
socket, i.e. listen type=socket/none).
Reviewed-by: NJán Tomko <jtomko@redhat.com>
Signed-off-by: NErik Skultety <eskultet@redhat.com>

Since QEMU 2.10, it's possible to use a new type of display -
egl-headless which uses drm nodes to provide OpenGL support. This patch
adds a capability for that. However, since QEMU doesn't provide a QMP
command to probe it, we have to base the capability on specific QEMU
version.
Acked-by: NMichal Privoznik <mprivozn@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>
Signed-off-by: NErik Skultety <eskultet@redhat.com>

Decrease the number of accessors we have to use.
Reviewed-by: NJán Tomko <jtomko@redhat.com>
Signed-off-by: NErik Skultety <eskultet@redhat.com>

It is no longer used.
Signed-off-by: NJán Tomko <jtomko@redhat.com>

We no longer support building WITH_YAJL, remove the dead code
as well as the virJSONParser structures that are no longer used.
Signed-off-by: NJán Tomko <jtomko@redhat.com>

Yajl has not seen much activity upstream recently.
Switch to using Jansson >= 2.5.

All the platforms we target on https://libvirt.org/platforms.html
have a version >= 2.7 listed on the sites below:
https://repology.org/metapackage/jansson/versions
https://build.opensuse.org/package/show/devel:libraries:c_c++/libjansson

Additionally, Ubuntu 14.04 on Travis-CI has 2.5. Set the requirement
to 2.5 since we don't use anything from newer versions.

Implement virJSONValue{From,To}String using Jansson, delete the yajl
code (and the related virJSONParser structure) and report an error
if someone explicitly specifies --with-yajl.

Also adjust the test data to account for Jansson's different whitespace
usage for empty arrays and tune up the specfile to keep 'make rpm'
working when bisecting.
Signed-off-by: NJán Tomko <jtomko@redhat.com>

The tls, x509 and x509verify options were deprecated in QEMU v2.5.0:

commit 3e305e4a4752f70c0b5c3cf5b43ec957881714f7
Author:     Daniel P. Berrange <berrange@redhat.com>

    ui: convert VNC server to use QCryptoTLSSession

Use the tls-creds-x509 object when available.

https://bugzilla.redhat.com/show_bug.cgi?id=1598167Signed-off-by: NJán Tomko <jtomko@redhat.com>

Reviewed-by: NErik Skultety <eskultet@redhat.com>
Signed-off-by: NCole Robinson <crobinso@redhat.com>

Add a 'skipUpdateCaps' bool that we set for test_driver.c nodedevs
which will skip accessing host resources via virNodeDeviceUpdateCaps
Reviewed-by: NErik Skultety <eskultet@redhat.com>
Signed-off-by: NCole Robinson <crobinso@redhat.com>

QEMU commit bf1e7140e adds reporting of new balloon statistic to QEMU
2.12. Value represents the amount of memory that can be quickly
reclaimed without additional I/O. Let's add that too.
Signed-off-by: NTomáš Golembiovský <tgolembi@redhat.com>
Reviewed-by: NJohn Ferlan <jferlan@redhat.com>

When VIR_DOMAIN_SCHEDULER_GLOBAL_PERIOD is matched "cputune.global_period"
should be updated and not "cputune.period".
Signed-off-by: NKaterina Koukiou <kkoukiou@redhat.com>

https://bugzilla.redhat.com/show_bug.cgi?id=1600427Reviewed-by: NJán Tomko <jtomko@redhat.com>
Signed-off-by: NJán Tomko <jtomko@redhat.com>

The last use has been removed in 026ae493.
Signed-off-by: NAndrea Bolognani <abologna@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

Commit id 318d54e5 altered the code to check for a NULL
first parameter, but neglected to alter the prototype.
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1599513Signed-off-by: NKaterina Koukiou <kkoukiou@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

Since commit f14c37, virDomainConfVMNWFilterTeardown is reporting errors
thus any previously reported error gets overwritten.
We need to save the errors in qemuDomainAttachNetDevice before calling
this function when we are in cleanup code.

https://bugzilla.redhat.com/show_bug.cgi?id=1598311Signed-off-by: NKaterina Koukiou <kkoukiou@redhat.com>
Reviewed-by: NMichal Privoznik <mprivozn@redhat.com>

When building without dlfcn.h we are providing a virModuleLoad()
stub which is supposed to report an error. However, the format
string in virReportSystemError() call there requires two strings
but we are passing just one.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

The commit 69b937f0 introduced VIR_AUTOFREE and this macro removed
VIR_FREE. This change showed that 'str' variable was not being used
inside this method. This commit removes this unused variable.
Signed-off-by: NJulio Faracco <jcfaracco@gmail.com>
Reviewed-by: NRoman Bogorodskiy <bogorodskiy@gmail.com>