As qemu becomes more modularized, it is important for libvirt to advertise
availability of the modularized functionality through capabilities. This
change adds channel devices to domain capabilities, allowing clients such
as virt-install to avoid using spicevmc channel devices when not supported
by the target qemu.
Signed-off-by: Jim Fehlig <jfehlig@suse.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
The error message doesn't really convey the information that 3d
acceleration works only for the 'virtio' model and similarly the same
error would be reported if qemu doesn't support acceleration, which is
hard to debug.
Split and clarify the errors.
Noticed in https://gitlab.com/libvirt/libvirt/-/issues/388
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Use g_autofree in capabilities.c for some pointers still using manual cleanup,
and remove unnecessary cleanup.
Signed-off-by: Jiang Jiacheng <jiangjiacheng@huawei.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Change strings to use g_autofree.
Signed-off-by: Maxim Kostin <ttxinee@outlook.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Users can play all sorts of games with mount points. For
instance, they can unmount and mount back a hugetlbfs and only
after that attempt to hotplug memory.
This has an unfortunate consequence though. During memory
hotplug, when qemuProcessBuildDestroyMemoryPaths() is called the
path is created with very restrictive mode (0700) because under
the hood g_mkdir_with_parents(path, 0700) is called.
Therefore, create the driver generic portion of the path
separately.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=2134009
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
During its initialization, the QEMU driver iterates over
hugetlbfs mount points, creating the driver specific path in each
of them ($prefix/libvirt/qemu). This path is created with very
wide mode (0777) because per-domain directories are then created
under it.
Separate this code into a function so that it can be re-used.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
domcapabilities reports spice graphics support even against a minimal
qemu installation without spice modules. Checking for 'query-spice'
in the list of qmp commands supported by qemu is not sufficient to
determine spice support. Checking the command line produces acurrate
results.
Signed-off-by: Jim Fehlig <jfehlig@suse.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
As qemu becomes more modularized, it is important for libvirt to advertise
availability of the modularized functionality through capabilities. This
change adds USB redirect devices to domain capabilities, allowing clients
such as virt-install to avoid using redirdev devices when not supported
by the target qemu.
Signed-off-by: Jim Fehlig <jfehlig@suse.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
The validation of a '<filesystem type='mount'>' device fails if the
elements inside are not ordered in the order in the schema despite using
<interleave>. This is a bug in libxml2's validator as removing the
'<optional>' property from the definition of the 'type' attribute with
'mount' variable fixes the problem.
I've reported it as another instance of a seemingly related issue:
https://gitlab.gnome.org/GNOME/libxml2/-/issues/131
Meanwhile libvirt can re-arrange the schema by extracting the common
bits into a new definition and referencing them from each of the choice
groups explicitly.
Resolves: https://gitlab.com/libvirt/libvirt/-/issues/392
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
When libvirt is restarted, the qemuProcessShutdownReboot command is
executed to restore the VM that is being restarted. In this case, a
coredump may occur when we hotplug a pci device since the PCI address
hasn't be inited yet. Moving the initialization of address to the front
of qemuProcessShutdownOrReboot to ensure that we have the address inited.
Signed-off-by: Jiang Jiacheng <jiangjiacheng@huawei.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
If QEMU replies to device_del command with "DeviceNotFound"
error, then libvirt doesn't clean the device from the live
configuration.
This is because qemuMonitorDelDevice() returns -2 to
qemuDomainDeleteDevice() and instead of calling
qemuDomainRemoveDevice() the qemuDomainDetachDeviceLive() jumps
right onto cleanup label.
Resolves: https://gitlab.com/libvirt/libvirt/-/issues/359
Signed-off-by: Pierre LIBEAU <pierre.libeau@corp.ovh.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
The @vendor variable inside virQEMUCapsCPUDefsToModels() is
allocated, but never freed. But there is actually no need for it
to be allocated, because it merely passes a retval of
virCPUGetVendorForModel() (which returns a const string) to
virDomainCapsCPUModelsAdd() (which ten accepts the argument as
const string). Therefore, drop the g_strdup() call and fix the
type of the variable.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
The path() method is deprecated in 0.55.0 and we're recommended
to use full_path() instead. Interestingly, we were already doing
do in couple of places, but not all of them.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
The source_root() method is deprecated in 0.56.0 and we're
recommended to use project_source_root() instead.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
The build_root() method is deprecated in 0.56.0 and we're
recommended to use project_build_root() instead.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Since commit "cpu_x86: Disable blockers from unusable CPU models"
(v3.8.0-99-g9c9620af1d) we explicitly disable CPU features reported by
QEMU as usability blockers for a particular CPU model when creating
baseline or host-model CPU definition. When QEMU changed canonical names
for some features (mostly those with '_' in their names), we forgot to
translate the blocker lists to names used by libvirt and the renamed
features would no longer be explicitly disabled in the created CPU model
even if they were reported as blockers by QEMU.
For example, on a host where EPYC CPU model has the following blockers
<blocker name='sha-ni'/>
<blocker name='mmxext'/>
<blocker name='fxsr-opt'/>
<blocker name='cr8legacy'/>
<blocker name='sse4a'/>
<blocker name='misalignsse'/>
<blocker name='osvw'/>
we would fail to disable 'fxsr-opt':
<cpu mode='custom' match='exact'>
<model fallback='forbid'>EPYC</model>
<feature policy='disable' name='sha-ni'/>
<feature policy='disable' name='mmxext'/>
<feature policy='disable' name='cr8legacy'/>
<feature policy='disable' name='sse4a'/>
<feature policy='disable' name='misalignsse'/>
<feature policy='disable' name='osvw'/>
<feature policy='disable' name='monitor'/>
</cpu>
The 'monitor' feature is disabled even though it is not reported as a
blocker by QEMU because libvirt's definition of EPYC includes the
feature while it is missing in EPYC definition in QEMU.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
The API can be used to get usability blockers for an unusable CPU model,
which is not obvious. Let's explicitly document this behavior as it is
now mentioned in the documentation of domain capabilities XML.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
This patch is effectively a no-op, but I wanted to initialize
.getVendorForModel explicitly as implementing this function does not
even make sense on ARM. The CPU models in our CPU map are only used for
describing host CPU in capabilities XML and cannot be used for guest CPU
definition in domain XML anyway. The CPU models listed as supported in
domain capabilities XML are just passed through from QEMU.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
So far QEMU driver does not get CPU model vendor from QEMU directly and
it has to ask the CPU driver for the info stored in CPU map.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Even though several CPU models from various vendors are reported as
usable on a given host, user may still want to use only those that match
the host vendor. Currently the only place where users can check the
vendor of each CPU model is our CPU map, which is considered internal
and users should not really be using it directly. So to allow for such
filtering we now advertise the vendor of each CPU model in domain
capabilities.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
The only part of qemuCaps both functions are interested in is the CPU
architecture. Changing them to expect just virArch makes the functions
more reusable.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
The ppc64 CPU code still has to load and parse the CPU map everytime it
needs to look at it, which can make some operations pretty slow. Other
archs already switched to loading the CPU map once and keeping the
parsed structure in memory. Let's switch ppc64 as well.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Since the function always returns 0, we can just return void and make
callers simpler.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
In recent commit of v8.8.0-41-g41eb0f446c I've suggested during
review to put both xdr_free() calls under error label, assuming
that xdr_free() accepts NULL and thus is a NOP when the control
jumps onto the label even before either of @arg or @ret was
allocated. Well, turns out, xdr_free() does no accept NULL and
thus we have to guard its call. But since @dispatcher is already
set by the time either of the variables is allocated, we can
replace the condition from 'if (dispatcher)' to 'if (arg)' and
'if (ret)'.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Since they are simply normal RPC messages, the keep alive packets are
subject to the "max_client_requests" limit just like any API calls.
Thus, if a client hits the 'max_client_requests' limit and all the
pending API calls take a long time to complete, it may result in
keep-alives firing and dropping the client connection.
This has been seen by a number of users with the default value of
max_client_requests=5, by issuing 5 concurrent live migration
operations.
By printing a warning message when this happens, admins will be alerted
to the fact that their active clients are exceeding the default client
requests limit.
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Remove the seldom used helper in favor of full virXMLParse.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Use the helper with more features to validate the root XML element name
instead of open-coding it.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
The function provided just checking of the root XML node name which can
be easily moved into the caller wich doesn't do that already and
checking of the pointers which is trivial. Remove the helper.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Convert the two outstanding uses to virXMLParseFileCtxt as they always
pass a filename and remove the helper macro.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Most callers prefer using the XPath context. Convert the last user to
use virXMLParseFileCtxt and remove the helper macro.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Use virXMLParse so that the code doesn't have to explicitly allocate
an XPath context and validate the root element.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Most callers use virXMLParseStringCtxt. Convert the last use case
and remove the helper.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Use virXMLParse's features to validate the top level element and fetch
the XPath context.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
virDomainObjParseFile is the only caller of virDomainObjParseNode.
The code can be merged into it, simplified by using virXMLParse and
the function removed.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Replace virNetworkDefParseString/File by direct calls to
virNetworkDefParse.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Both callers can be easily converted to call virNetworkDefParseXML
directly.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
The function was not used. Remove it and merge virInterfaceDefParse
into virInterfaceDefParseString.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Both callers be easily made to call virInterfaceDefParseXML directly.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Replace the thin wrappers virNodeDeviceDefParseString/File by directly
calling the main parser.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Both callers be easily made to call virNodeDeviceDefParseXML directly.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Replace virNWFilterDefParseString/File with the common function.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Use virXMLParse to fetch the XML context and validate the top level XML
element name so that virNWFilterDefParseNode is no longer needed.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Rename virDomainBackupDefParse to virDomainBackupDefParseXML and use
it in place of virDomainBackupDefParseNode. This is possible as
virXMLParse can be used to replace XPath context allocation and root
node checking.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Use features of virXMLParse to validate root node and fetch XPath
context.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
