Instead of blindly claim support for hot-plugging of every
interface type out there we should copy approach we have for
device types: white listing supported types and explicitly error
out on unsupported ones.
For instance, trying to hotplug vhostuser interface results in
nothing usable from guest currently. vhostuser typed interfaces
require additional work on our side.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
The idea is to have function that does some checking at its
beginning and then have one big switch for all the interface
types it supports.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
The idea is to have function that does some checking of the
arguments at its beginning and then have one big switch for all
the interface types it supports. Each one of them generating the
corresponding part of the command line.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
The idea is to have function that does some checking of the
arguments at its beginning and then have one big switch for all
the interface types it supports. Each one of them generating the
corresponding part of the command line.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
This function for some weird reason returns integer instead of
virDomainNetType type. It is important to return the correct type
so that we know what values we can expect.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
qemuBuildSmbiosBiosStr and qemuBuildSmbiosSystemStr return NULL if
there's nothing to format on the commandline. Reporting errors from
buffer creation doesn't make sense since it would be ignored.
This initially started as a fix of some debug printing in
virCgroupDetect. However it turned out that other places suffer
from the similar problem. While dealing with pids, esp. in cases
where we cannot use pid_t for ABI stability reasons, we often
chose an unsigned integer type. This makes no sense as pid_t is
signed.
Also, new syntax-check rule is introduced so we won't repeat this
mistake.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
There are two video devices with models without VGA compatibility mode.
They are primary used as secondary video devices, but in some cases it
is required to use them also as primary video devices.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
This improves commit 706b5b6277 in a way that we check qemu capabilities
instead of what architecture we are running on to detect whether we can
use *virtio-vga* model or not. This is not a case only for arm/aarch64.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Commit 21373feb added support for primary virtio-vga device but it was
checking for virtio-gpu. Let's check for existence of virtio-vga if we
want to use it.
Virtio video device is currently represented by three different models
*virtio-gpu-device*, *virtio-gpu-pci* and *virtio-vga*. The first two
models are tied together and if virtio video devices is compiled in they
both exist. However, the *virtio-vga* model doesn't have to exist on
some architectures even if the first two models exist. So we cannot
group all three together.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Before this patch we've checked qemu capabilities for video devices
only while constructing qemu command line using "-device" option.
Since we support qemu only if "-device" option is present we can use
the same capabilities to check also video devices while using "-vga"
option to construct qemu command line.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
All definition validation that doesn't depend on qemu capabilities
and was allowed previously as valid definition should be placed into
qemuDomainDefValidate.
The check whether video type is supported or not was based on an enum
that translates type into model. Use switch to ensure that if new
video type is added, it will be properly handled.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
We generally uses QEMU_CAPS_DEVICE_$NAME to probe for existence of some
device and QEMU_CAPS_$NAME_$PROP to probe for existence of some property
of that device.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
If QEMU in question supports QMP, this capability is set if
QEMU_CAPS_DEVICE_QXL was set based on existence of "-device qxl". If
libvirt needs to parse *help*, because there is no QMP support, it
checks for existence of "-vga qxl", but it also parses output of
"-device ?" and sets QEMU_CAPS_DEVICE_QXL too.
Now that libvirt supports only QEMU that has "-device" implemented it's
safe to drop this capability and stop using it.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
This patch simplifies QEMU capabilities for QXL video device. QEMU
exposes this device as *qxl-vga* and *qxl* and they are both the same
device with the same set of parameters, the only difference is that
*qxl-vga* includes VGA compatibility.
Based on QEMU code they are tied together so it's safe to check only for
presence of only one of them.
This patch also removes an invalid test case "video-qxl-sec-nodevice"
where there is only *qxl-vga* device and *qxl* device is not present.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Qemu supports *xen* video device only with XEN and this code was part
of xenner code. We dropped support for xenner in commit de9be0a.
Before this patch if you used 'xen' video type you ended up with
domain without any video device at all. Now we don't allow to start
such domain.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
It was never safe anyway and as such shouldn't have been enabled in the
first place. Future patches will allow hot-(un)pluging of some ivshmem
devices as a workaround.
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
Currently Libvirt allows attempts to migrate read only disks. Qemu
cannot handle this as read only disks cannot be written to on the
destination system. The end result is a cryptic error message and a
failed migration.
This patch causes migration to fail earlier and provides a meaningful
error message stating that migrating read only disks is not supported.
Signed-off-by: Corey S. McQuay <csmcquay@linux.vnet.ibm.com>
Reviewed-by: Jason J. Herne <jjherne@linux.vnet.ibm.com>
Reviewed-by: Boris Fiuczynski <fiuczy@linux.vnet.ibm.com>
The intel-iommu device has existed since QEMU 2.2.0, but
it was only possible to create it with -device since
QEMU 2.7.0, thanks to:
commit 621d983a1f9051f4cfc3f402569b46b77d8449fc
Author: Marcel Apfelbaum <marcel@redhat.com>
Date: Mon Jun 27 18:38:34 2016 +0300
hw/iommu: enable iommu with -device
Use the standard '-device intel-iommu' to create the IOMMU device.
The legacy '-machine,iommu=on' can still be used.
The libvirt capability check & command line formatting code
is thus broken for all QEMU versions 2.2.0 -> 2.6.0 inclusive.
This fixes it to use iommu=on instead.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Since introduction of chardev hotplug the code was wrong for the UDP
case and basically created a TCP socket instead. Use proper objects and
type for UDP.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1377602
We're about to add more options, let's avoid having multiple if-then-else
which each try to set up the qemuMonitorJSONMakeCommand call with all the
parameters it knows about.
Instead, use the fact that when a NULL is found in the argument list that
processing of the remaining arguments stops and just have call.
Signed-off-by: John Ferlan <jferlan@redhat.com>
We're about to add 6 new options and it appears (from testing) one cannot
utilize both the shorthand (alias) and (much) longer names for the arguments.
So modify the command builder to use the longer name and of course alter the
test output .args to have the similarly innocuous long name.
Also utilize a macro to build that name makes it so much more visually
appealing and saves a few characters or potential cut-n-paste issues.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Reduce some cut-n-paste code by creating common helper. Make use of the
recently added virJSONValueObjectStealArray to grab the devices list as
part of the common code (we we can Free the reply) and return devices for
each of the callers to continue to parse.
NB: This also adds error checking to qemuMonitorJSONDiskNameLookup
Signed-off-by: John Ferlan <jferlan@redhat.com>
If attaching to a qemu process fails after opening the monitor socket
libvirt does not clean up the monitor. As the monitor also holds a
reference to the domain object the qemu attach API basically leaks it.
QEMU also does not interact on a second monitor connection and thus a
further attempt to attach to it would lock up.
Prevent libvirt from leaking the monitor by explicitly closing it.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1378401
Attaching to a existing qemu process allows to get us into a situation
when qemu is new enough to have JSON monitor and new vCPU hotplug but
the json monitor is not used. The vCPU detection code would require it
though. This broke attaching to qemu processes.
Make the condition less strict and just skip the vCPU hotplug detection
if JSON monitor is not available.
Resolves one of the symptoms in:
https://bugzilla.redhat.com/show_bug.cgi?id=1378401
This breaks vCPU hotplug, because when starting a domain, we
create a copy of domain definition (which becomes live XML) and
during the post parse callbacks we might adjust some tunings so
that vCPU hotplug is possible.
This reverts commit 581b7756af18dcf84b57d9947978725d2dfbfc18.
Certain operations may make the vcpu order information invalid. Since
the order is primarily used to ensure migration compatibility and has
basically no other user benefits, clear the order prior to certain
operations and document that it may be cleared.
All the operations that would clear the order can still be properly
executed by defining a new domain configuration rather than using the
helper APIs.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1370357
virDomainDefSetVcpus was not designed to handle coldplug of vcpus now
that we can set state of vcpus individually.
Introduce qemuDomainSetVcpusConfig that properly handles state changes
of vcpus when coldplugging so that invalid configurations are not
created.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1375939
The current code that validates duplicate vcpu order would not work
properly if the order would exceed def->maxvcpus. Limit the order to the
interval described.
The bitmap indexes for the order duplicate check are shifted to 0 since
vcpu order 0 is not allowed. The error message doesn't need such
treating though.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1370360
If this reminds you of a commit message from around a year ago, it's
41c2aa729f0af084ede95ee9a06219a2dd5fb5df and yes, we're dealing with
"the same thing" again. Or f309db1f4d51009bad0d32e12efc75530b66836b and
it's similar.
There is a logic in place that if there is no real need for
memory-backend-file, qemuBuildMemoryBackendStr() returns 0. However
that wasn't the case with hugepage backing. The reason for that was
that we abused the 'pagesize' variable for storing that information, but
we should rather have a separate one that specifies whether we really
need the new object for hugepage backing. And that variable should be
set only if this particular NUMA cell needs special treatment WRT
hugepages.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1372153
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
So far only guestfwd and virtio were supported. Add an additional
for Xen as libxl channels create a Xen console visible to the guest.
Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
Signed-off-by: Jim Fehlig <jfehlig@suse.com>
The qemucapsprobe helper calls virQEMUCapsNewForBinaryInternal with
caps == NULL, causing the following crash:
Program received signal SIGSEGV, Segmentation fault.
#0 0x00007ffff788775f in virQEMUCapsInitHostCPUModel
(qemuCaps=qemuCaps@entry=0x649680, host=host@entry=0x10) at
src/qemu/qemu_capabilities.c:2969
#1 0x00007ffff7889dbf in virQEMUCapsNewForBinaryInternal
(caps=caps@entry=0x0, binary=<optimized out>,
libDir=libDir@entry=0x4033f6 "/tmp", cacheDir=cacheDir@entry=0x0,
runUid=runUid@entry=4294967295, runGid=runGid@entry=4294967295,
qmpOnly=true) at src/qemu/qemu_capabilities.c:4039
#2 0x0000000000401702 in main (argc=2, argv=0x7fffffffd968) at
tests/qemucapsprobe.c:73
Caused by v2.2.0-182-g68c7011.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
