As of eeb008dbfc the variable is not used anymore. Drop it.
Signed-off-by: Wang Yufei <james.wangyufei@huawei.com>
Signed-off-by: Zhang Bo <oscar.zhangbo@huawei.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
In the XML we have the vnc port number, but QEMU takes on command line
a vnc screen number, it's port-5900. We should fail with error message
that only ports in range [5900,65535] are valid.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1164966
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
https://bugzilla.redhat.com/show_bug.cgi?id=1220809
When cold-plugging an RNG device but something fails in
qemuDomainAssignAddresses, we will double free the RNG device.
Once a device is plugged into the domain, we should set the
device pointer to NULL to fix this issue.
...
5 0x00007fb7d180ac8a in virFree at util/viralloc.c:582
6 0x00007fb7d1895cdd in virDomainRNGDefFree at conf/domain_conf.c:19786
7 0x00007fb7d1895d99 in virDomainDeviceDefFree at conf/domain_conf.c:2022
8 0x00007fb7b92b8baf in qemuDomainAttachDeviceFlags at qemu/qemu_driver.c:8785
9 0x00007fb7d190c5d7 in virDomainAttachDeviceFlags at libvirt-domain.c:8488
10 0x00007fb7d23af9d2 in remoteDispatchDomainAttachDeviceFlags at remote_dispatch.h:2842
...
Signed-off-by: Luyao Huang <lhuang@redhat.com>
The code to add device type to the commandline was identical for lsi
and other models of SCSI controllers, but was duplicated (with the
exception of a minor ordering difference of the if-else clauses) for
the two cases. This patch replaces those two with a single instance of
the code just before the if().
This patch makes qemuValideDevicePCISlotsChipsets() more consistent in
appearance by replacing several clauses of an if with the equivalent
call to qemuDomainMachineIsI440FX. The if was checking exactly the
same items, just in a slightly different order.
Since libvirt doesn't call to update the new balloon size in qemu add
code that will handle tweaking of the size of the current balloon
statistic until qemu reports the new size using the event.
Use the new domain list collection helpers to avoid going through
virDomainPtrs.
This additionally implements filter capability when called through the
api that accepts domain list filters.
Extend it to a universal helper used for clearing lists of any objects.
Note that the argument type is specifically void * to allow implicit
typecasting.
Additionally add a helper that works on non-NULL terminated arrays once
we know the length.
https://bugzilla.redhat.com/show_bug.cgi?id=890648
So, imagine you've issued an API that involves guest agent. For
instance, you want to query guest's IP addresses. So the API acquires
QUERY_JOB, locks the guest agent and issues the agent command.
However, for some reason, guest agent replies to initial ping
correctly, but then crashes tragically while executing real command
(in this case guest-network-get-interfaces). Since initial ping went
well, libvirt thinks guest agent is accessible and awaits reply to the
real command. But it will never come. What will is a monitor event.
Our handler (processSerialChangedEvent) will try to acquire
MODIFY_JOB, which will fail obviously because the other thread that's
executing the API already holds a job. So the event handler exits
early, and the QUERY_JOB is never released nor ended.
The way how to solve this is to put flag somewhere in the monitor
internals. The flag is called @running and agent commands are issued
iff the flag is set. The flag itself is set when we connect to the
agent socket. And unset whenever we see DISCONNECT event from the
agent. Moreover, we must wake up all the threads waiting for the
agent. This is done by signalizing the condition they're waiting on.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Running shutdown with mode agent on a shutoff domain gives cryptic
error message:
virsh # shutdown --mode agent gentoo
error: Failed to shutdown domain gentoo
error: Guest agent is not responding: QEMU guest agent is not connected
After this patch, the error is more clear:
virsh # shutdown --mode agent gentoo
error: Failed to shutdown domain gentoo
error: Requested operation is not valid: domain is not running
Reported-by: Martin Kletzander <mkletzan@redhat.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Allow ccw devices to be used with multiqueues. ccw provides a one to
one relation of fds to queues and does not support the vectors option.
Signed-off-by: Boris Fiuczynski <fiuczy@linux.vnet.ibm.com>
Reviewed-by: Matthew Rosato <mjrosato@linux.vnet.ibm.com>
Reviewed-by: Daniel Hansel <daniel.hansel@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Coverity points out that qemuMonitorGetAllBlockStatsInfo could return a
-1 and thus not fill in 'stats' (leaving it NULL). Then the call to
qemuMonitorBlockStatsUpdateCapacity will dereference it.
Coverity complains over the [n]values pairing in virQEMUCapsFreeStringList
and rather than make a bunch if "if values" checks prior to calling, by
just adding the values check inside the free function we avoid the chance
that somehow nvalues is > 0, while values == NULL
Coverity points out it was possible to have a zero return from
qemuBuildRNGBackendProps thus not filling in 'props' and then
causing a NULL dereference on the next call.
Coverity notes that ->ifname is used after the VIR_FREE done in the
code path after the call to virNetDevMacVLanDeleteWithVPortProfile
by a call to virNetDevOpenvswitchRemovePort.
Since the ->ifname will be VIR_FREE()'d eventually in virDomainNetDefFree
just remove the extraneous VIR_FREE here.
When originally added, the Openvswitch code wasn't present and checks
were made for non NULL prior to use.
Coverity complains that in the error paths both the < 0 condition and
the success path after the qemuDomainObjExitMonitor failure will end
up going to cleanup. So just use ignore_value in this error path to
resolve the complaint.
The only version that's supported in QEMU is version 2, currently.
Fortunately, it is enabled by aarch64 automatically, so there's
nothing for us that needs to be put onto command line.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
When migrating a domain while changing its name and using
VIR_MIGRATE_PERSIST_DEST flag, libvirt would fail to properly change the
name in the persistent definition. The inconsistency results in weird
behavior when dumping domain XML, destroying the domain, restarting
libvirtd and likely in several other situations.
Since the new name is already stored in vm->def->name, we just need to
make sure the persistent definition uses this new name too.
https://bugzilla.redhat.com/show_bug.cgi?id=1076354
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Set the capability based on qmp query, or qemu version. The qmp query
includes vmport with 2.2, but no longer with 2.3. It lists only
non-machine specific capabilities, so check the qemu version too until a
machine-specific query is supported.
Now that we have macros for exclusive flags and flag requirements we can
use them to cleanup the code for setvcpus and error out for all wrong
flag combination.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Found by Laine and discussed a bit on internal IRC.
Commit id c56fe7f1d6 added support for creating a command line to support
scsi-disk.channel.
Series was here:
http://www.redhat.com/archives/libvir-list/2012-February/msg01052.html
Which pointed to a design proposal here:
http://permalink.gmane.org/gmane.comp.emulators.libvirt/50428
Which states (in part):
Libvirt should check for the QEMU "scsi-disk.channel" property. If it
is unavailable, QEMU will only support channel=lun=0 and 0<=target<=7.
However, the check added was ensuring that bus != lun *and* bus != 0. So
if bus == lun and both were non zero, we'd never make the second check.
Changing this to an *or* check fixes the check, but still is less readable
than the just checking each for 0
Since the qemu capabilities are not initialized for offline VMs the
caller might get suboptimal error message:
$ virsh blockjob VM PATH --bandwidth 1
error: unsupported configuration: block jobs not supported with this QEMU binary
Move the checks after we make sure that the VM is alive.
In qemuMigrationDriveMirror we can start all disk mirrors in parallel.
We wait until they are all ready, or one of them aborts.
In qemuMigrationCancelDriveMirror, we wait until all mirrors are
properly stopped. This is necessary to ensure that destination VM is
fully in sync with the (paused) source VM.
If a drive mirror can not be cancelled, then the destination is not in a
consistent state. In this case it is not safe to continue with the
migration.
Signed-off-by: Michael Chapman <mike@very.puzzling.org>
The !modern code path needs to call qemuBlockJobEventProcess directly.
the modern code path will call it via qemuBlockJobSyncWait.
Signed-off-by: Michael Chapman <mike@very.puzzling.org>
Other threads may be blocked in qemuBlockJobSyncWait. Ensure that
they're woken up when the domain is stopped.
Signed-off-by: Michael Chapman <mike@very.puzzling.org>
qemuBlockJobSyncBegin and qemuBlockJobSyncEnd delimit a region of code
where block job events are processed "synchronously".
qemuBlockJobSyncWait and qemuBlockJobSyncWaitWithTimeout wait for an
event generated by a block job.
The Wait* functions may be called multiple times while the synchronous
block job is active. Any pending block job event will be processed by
only when Wait* or End is called. disk->blockJobStatus is reset by
these functions, so if it is needed a pointer to a
virConnectDomainEventBlockJobStatus variable should be passed as the
last argument. It is safe to pass NULL if you do not care about the
block job status.
All functions assume the VM object is locked. The Wait* functions will
unlock the object for as long as they are waiting. They will return -1
and report an error if the domain exits before an event is received.
Typical use is as follows:
virQEMUDriverPtr driver;
virDomainObjPtr vm; /* locked */
virDomainDiskDefPtr disk;
virConnectDomainEventBlockJobStatus status;
qemuBlockJobSyncBegin(disk);
... start block job ...
if (qemuBlockJobSyncWait(driver, vm, disk, &status) < 0) {
/* domain died while waiting for event */
ret = -1;
goto error;
}
... possibly start other block jobs
or wait for further events ...
qemuBlockJobSyncEnd(driver, vm, disk, NULL);
To perform other tasks periodically while waiting for an event:
virQEMUDriverPtr driver;
virDomainObjPtr vm; /* locked */
virDomainDiskDefPtr disk;
virConnectDomainEventBlockJobStatus status;
unsigned long long timeout = 500 * 1000ull; /* milliseconds */
qemuBlockJobSyncBegin(disk);
... start block job ...
do {
... do other task ...
if (qemuBlockJobSyncWaitWithTimeout(driver, vm, disk,
timeout, &status) < 0) {
/* domain died while waiting for event */
ret = -1;
goto error;
}
} while (status == -1);
qemuBlockJobSyncEnd(driver, vm, disk, NULL);
Signed-off-by: Michael Chapman <mike@very.puzzling.org>
We will want to use synchronous block jobs from qemu_migration as well,
so split this function out into a new source file.
Signed-off-by: Michael Chapman <mike@very.puzzling.org>
The documentation states that for shallow block copy the image has to
have the same guest visible content as backing file of the current
image if the file is being reused. This condition can be achieved also
with a raw file (or a qcow without a backing file) so remove the
condition that would disallow it.
(This patch additionally fixes crash described in
https://bugzilla.redhat.com/show_bug.cgi?id=1215569 )
It would be used in qemumonitorjsontest, thus we make it non-static.
Signed-off-by: Zhang Bo <oscar.zhangbo@huawei.com>
Signed-off-by: Zhou Yimin <zhouyimin@huawei.com>
If we received zero iothreads from the monitor, but were perhaps
expecting to receive something, then the code was skipping the check
to ensure what's in the monitor matches our expectations. So invert
the checks to check that what we get back matches expectations and
then check there are zero iothreads returned.
Rather than have a separate routine to parse the alias of an iothread
returned from qemu in order to get the iothread_id value, parse the alias
when returning and just return the iothread_id in qemuMonitorIOThreadInfoPtr
This set of patches removes the function, changes the "char *name" to
"unsigned int" and handles all the fallout.
Coverity notes that the switch() used to check 'connected' values has
two DEADCODE paths (_DEFAULT & _LAST). Since 'connected' is a boolean
it can only be one or the other (CONNECTED or DISCONNECTED), so it just
seems pointless to use a switch to get "all" values. Convert to if-else
Add qemuDomainAddIOThread and qemuDomainDelIOThread in order to add or
remove an IOThread to/from the host either for live or config optoins
The implementation for the 'live' option will use the iothreadpids list
in order to make decision, while the 'config' option will use the
iothreadids list. Additionally, for deletion each may have to adjust
the iothreadpin list.
IOThreads are implemented by qmp objects, the code makes use of the existing
qemuMonitorAddObject or qemuMonitorDelObject APIs.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Remove the iothreadspin array from cputune and replace with a cpumask
to be stored in the iothreadids list.
Adjust the test output because our printing goes in order of the iothreadids
list now.
Add 'thread_id' to the virDomainIOThreadIDDef as a means to store the
'thread_id' as returned from the live qemu monitor data.
Remove the iothreadpids list from _qemuDomainObjPrivate and replace with
the new iothreadids 'thread_id' element.
Rather than use the default numbering scheme of 1..number of iothreads
defined for the domain, use the iothreadid's list for the iothread_id
Since iothreadids list keeps track of the iothread_id's, these are
now used in place of the many places where a for loop would "know"
that the ID was "+ 1" from the array element.
The new tests ensure usage of the <iothreadid> values for an exact number
of iothreads and the usage of a smaller number of <iothreadid> values than
iothreads that exist (and usage of the default numbering scheme).
If a user hot-attaches the guest agent channel libvirt would ignore it
until the restart of libvirtd or shutdown/destroy and start of the VM
itself.
This patch adds code that opens or closes the guest agent connection
according to the state of the guest agent channel according to
connect/disconnect events.
To allow opening the channel from the event handler qemuConnectAgent
needed to be exported.
When the guest agent channel gets hotplugged to a VM, libvirt would
still report that "QEMU guest agent is not configured" rather than
stating that the connection was not established yet.
Currently the code won't be able to connect to the agent after hotplug
but that will change in a later patch.
As the qemuFindAgentConfig() helper is quite helpful in this case move
it to a more usable place and export it.
virDomainGetJobStats is able to report statistics of a completed
migration, however to get usable downtime and total time statistics both
hosts have to keep synchronized time. To provide at least some
estimation of the times even when NTP daemons are not running on both
hosts we can just ignore the time needed to transfer a migration cookie
to the destination host. The result will be also inaccurate but a bit
more predictable. The total/down time will just be at least what we
report.
https://bugzilla.redhat.com/show_bug.cgi?id=1213434
Every domain that grabs a domain object to work over should
reference it to make sure it won't disappear meanwhile.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
This is basically turning qemuDomObjEndAPI into a more general
function. Other drivers which gets a reference to domain objects may
benefit from this function too.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
just as what b8e25c35d7 did, we
fall back to the ACPI method when the guest agent is unresponsive
in qemuDomainReboot().
Signed-off-by: YueWenyuan <yuewenyuan@huawei.com>
Signed-off-by: Zhang Bo <oscar.zhangbo@huawei.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Because packets going through the egress from a bridge (where our
bandwidth limiting takes place) have no information about which
interface they came from, the QoS rules that we create instead
use the source MAC address of the packets to make their decisions
about which QDisc the packet should be in.
One flaw in this is that when a guest changed the MAC address it
used, packets from the guest would no longer be put into the
correct QDisc, but would instead be put in an "unprivileged"
class, resulting in the bandwidth "floor" (minimum guaranteed)
being no longer honored.
Now that libvirt has infrastructure to capture and respond to
RX_FILTER_CHANGE events from qemu (sent whenever a guest
interface modifies its MAC address, among other things), we can
notice when a guest MAC address changes, and update the QoS rules
accordingly, so that bandwidth floor is honored even after a
guest MAC address change.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
qemuDomainSetMemoryFlags() would allow to set the initial memory greater
than the <maxMemory> field. While the configuration would not work as
memory hotplug requires NUMA to be enabled and the
qemuDomainSetMemoryFlags() API does not work on NUMA guests this just
fixes a corner case.
The fix is still worth though as it allows to induce an invalid
configuration and make the VM vanish on libvirt restart.
Additionally this tweaks error message to be more accurate.
Signed-off-by: Luyao Huang <lhuang@redhat.com>
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
A further fix for:
https://bugzilla.redhat.com/show_bug.cgi?id=1113474
Since there is no possibility that any type of macvtap will work if
the parent physdev it's attached to is offline, we should bring the
physdev online at the same time as the macvtap. When taking the
macvtap offline, it's also necessary to take the physdev offline for
macvtap passthrough mode (because the physdev has the same MAC address
as the macvtap device, so could potentially cause problems with
misdirected packets during migration, as outlined in commits 829770
and 879c13). We can't set the physdev offline for other macvtap modes
1) because there may be other macvtap devices attached to the same
physdev (and/or the host itself may be using the device) in the other
modes whereas passthrough mode is exclusive to one macvtap at a time,
and 2) there's no practical reason to do so anyway.
- Remove all qemu emulators
- Restart libvirtd
- Install qemu emulators
- Call 'virsh version' -> errors
The only thing that will force the qemu driver to refresh it's cached
capablities info is an explict API call to GetCapabilities.
However in the case when the initial caps lookup at driver connect didn't
find a single qemu emulator to poll, the driver is effectively useless
and really can't do anything until it's populated some qemu capabilities
info.
With the above steps, the user would have to either know about the
magic refresh capabilities call, or restart libvirtd to pick up the
changes.
Instead, this patch changes things so that every time a part of th
driver requests access to capabilities info, check to see if
we've previously seen any emulators. If not, force a refresh.
In the case of 'still no emulators found', this is still very quick, so
I can't think of a downside.
https://bugzilla.redhat.com/show_bug.cgi?id=1000116
This needs to specified in way too many places for a simple validation
check. The ostype/arch/virttype validation checks later in
DomainDefParseXML should catch most of the cases that this was covering.
This revealed that GuestDefaultEmulator was a bit buggy, capable
of returning an emulator that didn't match the passed domain type. Fix
up the test suite input to continue to pass.
https://bugzilla.redhat.com/show_bug.cgi?id=1209948
So we have this bug. The virConnectGetDomainCapabilities() API
performs a couple of checks before it produces any result. One of
the checks is if the architecture requested by user can be run by
the binary (again user provided). However, the check is pretty
dumb. It merely compares if the default binary architecture
matches the one provided by user. However, a qemu binary can run
multiple architectures. For instance: qemu-system-ppc64 can run:
ppc, ppcle, ppc64, ppc64le and ppcemb. The default is ppc64, so
if user requested something else, like ppc64le, the check would
have failed without obvious reason.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
When a qemu domain is to be rebooted, from outside, at libvirt
level it looks like regular shutdown. To really restart the
domain, libvirt needs to issue reset command on the monitor once
SHUTDOWN event appeared. So, in order to differentiate bare
shutdown and reboot libvirt uses a variable within domain private
data. It's called fakeReboot. When the reboot API is called, the
variable is set, but when the shutdown API is called it must be
cleared out. But it was not for every possible case. So if user
called virDomainReboot(), and there was no ACPI daemon running
inside the guest (so guest didn't initiated shutdown sequence)
and then virDomainShutdown(mode=agent) was called bad thing
happened. We remembered the fakeReboot and instead of shutting
the domain down, we just rebooted it.
Signed-off-by: Zhang Bo <oscar.zhangbo@huawei.com>
Signed-off-by: Wang Yufei <james.wangyufei@huawei.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Among all the monitor APIs some where checking if mon is NULL and some
were not. Since it's possible to have mon equal to NULL in case a second
call is attempted once entered the monitor. This requires that every
single API checks for the monitor.
This patch adds a macro that helps checking the state of the monitor and
either refactors existing checking code to use the macro or adds it in
case it was missing.
Rather than erroring out make the best attempt to retrieve other data if
disks are inaccessible or missing. The failure will still be logged
though.
Since the bulk stats API is called on multiple domains an error like
this makes the API unusable. This regression was introduced by commit
596a137134
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1209394
Commit f6563bc3 introduced HMP impl of the function (so that a different
uglier function could be removed). Before the HMP code is called there's
a leftover check that the monitor is JSON which inhibits the code from
working.
Changing the prototype to not have "int *index" since we'll soon be
disallowing index as a name. Curiously the original commit (a4504ac)
for the function used 'int idx' in the function - so they didn't match.
Now they do.
It is there even with -nodefaults and -no-user-config, so count with
that so we can start sparc domains.
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
1. 'last_good_net' indicates the index of last successfully configured
net. so def->nets[last_good_net] should also be clean up if error occurs.
2. if error occurs in 'virNetDevMacVLanVPortProfileRegisterCallback'
(second 'goto err_exit' in loop), we should also do
'virNetDevVPortProfileDisassociate' cleanup for the
'virNetDevVPortProfileAssociate'(first code block in loop). So we should
consider the net is successfully configured after first code block in
loop finishes.
Signed-off-by: Huanle Han <hanxueluo@gmail.com>
After set memory parameters for running domain, save the change to live
xml is needed otherwise it will disappear after restart libvirtd.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1211548
Signed-off-by: Shanzhi Yu <shyu@redhat.com>
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Apparently for Xen-devel 'index' is a global and causes a build failure,
so just use the shortened 'idx' instead to avoid the conflict.
Signed-off-by: John Ferlan <jferlan@redhat.com>
QEMU does not abandon the mirror. The job carries on in the synchronised
phase and it might be either pivoted again or cancelled. The commit
hints that the described behavior was happening in a downstream version.
If the command returns false there are two possible options:
1) qemu did not reach the point where it would ask the block job to
pivot
2) pivotting failed in the actual qemu coroutine
If either of those would happen we return failure and reset the
condition that waits for the block job to complete. This makes the API
fail but in case where qemu would actually abandon the mirror the fact
is notified via the event and handled asynchronously.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1202704
qemuDomainBlockJobImpl become an unmaintainable mess over the years of
adding new stuff to it. This patch starts splitting up individual
functions from it until it can be killed entirely.
In bulk this will add lines of code rather than delete them but it will
be traded for maintainability.
My intention is to split qemuMonitorJSONBlockJob() into simpler separate
functions for every block job type. Since the error handling code is the
same for all block jobs, this patch extracts the code into a separate
function that will later be reused in more places.
With the new helper qemuMonitorJSONErrorIsClass we can save a few
function calls as we can extract the error object once.
Split out the function that checks the actual error class string into a
separate helper as it will be useful later and refactor
qemuMonitorJSONHasError to return bool type and remove few useless
checks.
Basically virJSONValueObjectHasKey are useless here since the next call
to virJSONValueObjectGet is checking the return value again (which can't
fail at that point). By removing the first check we save a function
call.
Previously we checked that the vcpu we are trying to set is in range of
the number of threads presented by qemu. The problem is that if the VM
is offline the count is 0. Since the condition subtracted 1 from the
count the number would overflow and the check would never trigger.
Change the condition for more sensible ones with specific error
messages.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1208434
This patch adds checks for empty bitmaps right after the calls of
virBitmapParse. These only include spots where set API's are called and
where domain's XML is parsed.
Also, it partially reverts commit 983f5a which added a check for
invalid nodeset "0,^0" into virBitmapParse function. This change broke
the logic, as an empty bitmap should not cause an error.
https://bugzilla.redhat.com/show_bug.cgi?id=1210545
On arm, we probe for virtio-*-pci devices, but use their
virtio-*-device variants.
Set the capabilities based on the -device variants as well,
to make them work with qemus with the PCI devices compiled out.
When pre-creating storage for domains, we need to find corresponding
disk in the XML on the destination (domain XML may differ there, e.g.
disk is accessible under different path). For better debugging, I'm
printing all info I received on a disk. But there was a typo when
printing the disk capacity: "%lluu" instead of "%llu".
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
The problem with the previous implementation is,
even when qemuMigrationUpdateJobStatus() detects a migration job
has completed, it will do a sleep for 50 ms (which is unnecessary
and only adds up to the VM pause time).
Signed-off-by: Xing Lin <xinglin@cs.utah.edu>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Future IOThread setting patches would copy the code anyway, so create
and generalize the adding of pindef for the vcpu and the pinning of the
thread into their own APIs.
We support VNC for containers to have the same
interface with VMs. At this moment it just renders
linux text console.
Of course we don't pass any physical devices and
don't emulate virtual devices. Our VNC server
renders text from terminal master and sends
input events from VNC client to terminal.
So add special video type VIR_DOMAIN_VIDEO_TYPE_PARALLELS
for these pseudo-devices.
Signed-off-by: Dmitry Guryanov <dguryanov@parallels.com>
Future IOThread setting patches would copy the code anyway, so create
and generalize a delete cgroup and pindef for the vcpu into its own API.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Future IOThread setting patches would copy the code anyway, so create
and generalize the add the vcpu to a cgroup into its own API.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Support for drive-reopen was never present in the upstream code so we
don't need to pause the VM when doing the block pivot. Kill all the
code related to this semi-upstream artifact.
131,088 bytes in 16 blocks are definitely lost in loss record 2,174 of 2,176
at 0x4C29BFD: malloc (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so)
by 0x4C2BACB: realloc (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so)
by 0x52A026F: virReallocN (viralloc.c:245)
by 0x52BFCB5: saferead_lim (virfile.c:1268)
by 0x52C00EF: virFileReadLimFD (virfile.c:1328)
by 0x52C019A: virFileReadAll (virfile.c:1351)
by 0x52A5D4F: virCgroupGetValueStr (vircgroup.c:763)
by 0x1DDA0DA3: qemuRestoreCgroupState (qemu_cgroup.c:805)
by 0x1DDA0DA3: qemuConnectCgroup (qemu_cgroup.c:857)
by 0x1DDB7BA1: qemuProcessReconnect (qemu_process.c:3694)
by 0x52FD171: virThreadHelper (virthread.c:206)
by 0x82B8DF4: start_thread (pthread_create.c:308)
by 0x85C31AC: clone (clone.S:113)
Signed-off-by: Luyao Huang <lhuang@redhat.com>
https://bugzilla.redhat.com/show_bug.cgi?id=1198645
Once upon a time, there was a little domain. And the domain was pinned
onto a NUMA node and hasn't fully allocated its memory:
<memory unit='KiB'>2355200</memory>
<currentMemory unit='KiB'>1048576</currentMemory>
<numatune>
<memory mode='strict' nodeset='0'/>
</numatune>
Oh little me, said the domain, what will I do with so little memory.
If I only had a few megabytes more. But the old admin noticed the
whimpering, barely audible to untrained human ear. And good admin he
was, he gave the domain yet more memory. But the old NUMA topology
witch forbade to allocate more memory on the node zero. So he
decided to allocate it on a different node:
virsh # numatune little_domain --nodeset 0-1
virsh # setmem little_domain 2355200
The little domain was happy. For a while. Until bad, sharp teeth
shaped creature came. Every process in the system was afraid of him.
The OOM Killer they called him. Oh no, he's after the little domain.
There's no escape.
Do you kids know why? Because when the little domain was born, her
father, Libvirt, called numa_set_membind(). So even if the admin
allowed her to allocate memory from other nodes in the cgroups, the
membind() forbid it.
So what's the lesson? Libvirt should rely on cgroups, whenever
possible and use numa_set_membind() as the last ditch effort.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Currently we check qemuCaps before starting the block job. But qemuCaps
isn't available on a stopped domain, which means we get a misleading
error message in this case:
# virsh domstate example
shut off
# virsh blockjob example vda
error: unsupported configuration: block jobs not supported with this QEMU binary
Move the qemuCaps check into the block job so that we are guaranteed the
domain is running.
Signed-off-by: Michael Chapman <mike@very.puzzling.org>
qemuMigrationCookieAddNBD is usually called from within an async
MIGRATION_OUT or MIGRATION_IN job, so it needs to start a nested job.
(The one exception is during the Begin phase when change protection
isn't enabled, but qemuDomainObjEnterMonitorAsync will behave the same
as qemuDomainObjEnterMonitor in this case.)
This bug was encountered with a libvirt client that repeatedly queries
the disk mirroring block job info during a migration. If one of these
queries occurs just as the Perform migration cookie is baked, libvirt
crashes.
Relevant logs are as follows:
6701: warning : qemuDomainObjEnterMonitorInternal:1544 : This thread seems to be the async job owner; entering monitor without asking for a nested job is dangerous
[1] 6701: info : qemuMonitorSend:972 : QEMU_MONITOR_SEND_MSG: mon=0x7fefdc004700 msg={"execute":"query-block","id":"libvirt-629"}
[2] 6699: info : qemuMonitorIOWrite:503 : QEMU_MONITOR_IO_WRITE: mon=0x7fefdc004700 buf={"execute":"query-block","id":"libvirt-629"}
[3] 6704: info : qemuMonitorSend:972 : QEMU_MONITOR_SEND_MSG: mon=0x7fefdc004700 msg={"execute":"query-block-jobs","id":"libvirt-630"}
[4] 6699: info : qemuMonitorJSONIOProcessLine:203 : QEMU_MONITOR_RECV_REPLY: mon=0x7fefdc004700 reply={"return": [...], "id": "libvirt-629"}
6699: error : qemuMonitorJSONIOProcessLine:211 : internal error: Unexpected JSON reply '{"return": [...], "id": "libvirt-629"}'
At [1] qemuMonitorBlockStatsUpdateCapacity sends its request, then waits
on mon->notify. At [2] the request is written out to the monitor socket.
At [3] qemuMonitorBlockJobInfo sends its request, and also waits on
mon->notify. The reply from the first request is received at [4].
However, qemuMonitorJSONIOProcessLine is not expecting this reply since
the second request hadn't completed sending. The reply is dropped and an
error is returned.
qemuMonitorIO signals mon->notify twice during its error handling,
waking up both of the threads waiting on it. One of them clears mon->msg
as it exits qemuMonitorSend; the other crashes:
qemuMonitorSend (mon=0x7fefdc004700, msg=<value optimized out>) at qemu/qemu_monitor.c:975
975 while (!mon->msg->finished) {
(gdb) print mon->msg
$1 = (qemuMonitorMessagePtr) 0x0
Signed-off-by: Michael Chapman <mike@very.puzzling.org>
If a VM migration is aborted, a disk mirror may be failed by QEMU before
libvirt has a chance to cancel it. The disk->mirrorState remains at
_ABORT in this case, and this breaks subsequent mirrorings of that disk.
We should instead check the mirrorState directly and transition to _NONE
if it is already aborted. Do the check *after* aborting the block job in
QEMU to avoid a race.
Signed-off-by: Michael Chapman <mike@very.puzzling.org>
If virCloseCallbacksSet fails, qemuMigrationBegin must return NULL to
indicate an error occurred.
Signed-off-by: Michael Chapman <mike@very.puzzling.org>
The destination libvirt daemon in a migration may segfault if the client
disconnects immediately after the migration has begun:
# virsh -c qemu+tls://remote/system list --all
Id Name State
----------------------------------------------------
...
# timeout --signal KILL 1 \
virsh migrate example qemu+tls://remote/system \
--verbose --compressed --live --auto-converge \
--abort-on-error --unsafe --persistent \
--undefinesource --copy-storage-all --xml example.xml
Killed
# virsh -c qemu+tls://remote/system list --all
error: failed to connect to the hypervisor
error: unable to connect to server at 'remote:16514': Connection refused
The crash is in:
1531 void
1532 qemuDomainObjEndJob(virQEMUDriverPtr driver, virDomainObjPtr obj)
1533 {
1534 qemuDomainObjPrivatePtr priv = obj->privateData;
1535 qemuDomainJob job = priv->job.active;
1536
1537 priv->jobs_queued--;
Backtrace:
#0 at qemuDomainObjEndJob at qemu/qemu_domain.c:1537
#1 in qemuDomainRemoveInactive at qemu/qemu_domain.c:2497
#2 in qemuProcessAutoDestroy at qemu/qemu_process.c:5646
#3 in virCloseCallbacksRun at util/virclosecallbacks.c:350
#4 in qemuConnectClose at qemu/qemu_driver.c:1154
...
qemuDomainRemoveInactive calls virDomainObjListRemove, which in this
case is holding the last remaining reference to the domain.
qemuDomainRemoveInactive then calls qemuDomainObjEndJob, but the domain
object has been freed and poisoned by then.
This patch bumps the domain's refcount until qemuDomainRemoveInactive
has completed. We also ensure qemuProcessAutoDestroy does not return the
domain to virCloseCallbacksRun to be unlocked in this case. There is
similar logic in bhyveProcessAutoDestroy and lxcProcessAutoDestroy
(which call virDomainObjListRemove directly).
Signed-off-by: Michael Chapman <mike@very.puzzling.org>
==19015== 968 (416 direct, 552 indirect) bytes in 1 blocks are definitely lost in loss record 999 of 1,049
==19015== at 0x4C2C070: calloc (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so)
==19015== by 0x52ADF14: virAllocVar (viralloc.c:560)
==19015== by 0x5302FD1: virObjectNew (virobject.c:193)
==19015== by 0x1DD9401E: virQEMUDriverConfigNew (qemu_conf.c:164)
==19015== by 0x1DDDF65D: qemuStateInitialize (qemu_driver.c:666)
==19015== by 0x53E0823: virStateInitialize (libvirt.c:777)
==19015== by 0x11E067: daemonRunStateInit (libvirtd.c:905)
==19015== by 0x53201AD: virThreadHelper (virthread.c:206)
==19015== by 0xA1EE1F2: start_thread (in /lib64/libpthread-2.19.so)
==19015== by 0xA4EFC8C: clone (in /lib64/libc-2.19.so)
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
==19015== 1,064 (656 direct, 408 indirect) bytes in 2 blocks are definitely lost in loss record 1,002 of 1,049
==19015== at 0x4C2C070: calloc (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so)
==19015== by 0x52AD74B: virAlloc (viralloc.c:144)
==19015== by 0x52B47CA: virCgroupNew (vircgroup.c:1057)
==19015== by 0x52B53E5: virCgroupNewVcpu (vircgroup.c:1451)
==19015== by 0x1DD85A40: qemuSetupCgroupForVcpu (qemu_cgroup.c:1013)
==19015== by 0x1DDA66EA: qemuProcessStart (qemu_process.c:4844)
==19015== by 0x1DDF1807: qemuDomainObjStart (qemu_driver.c:7265)
==19015== by 0x1DDF1A66: qemuDomainCreateWithFlags (qemu_driver.c:7320)
==19015== by 0x1DDF1ACD: qemuDomainCreate (qemu_driver.c:7337)
==19015== by 0x53F87EA: virDomainCreate (libvirt-domain.c:6820)
==19015== by 0x12690A: remoteDispatchDomainCreate (remote_dispatch.h:3481)
==19015== by 0x126827: remoteDispatchDomainCreateHelper (remote_dispatch.h:3457)
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Instead of always using controller 0 and incrementing port number,
respect the maximum port numbers of controllers and use all of them.
Ports for virtio consoles are quietly reserved, but not formatted
(neither in XML nor on QEMU command line).
Also rejects duplicate virtio-serial addresses.
https://bugzilla.redhat.com/show_bug.cgi?id=890606https://bugzilla.redhat.com/show_bug.cgi?id=1076708
Test changes:
* virtio-auto.args
Filling out the port when just the controller is specified.
switched from using
maxport + 1
to:
first free port on the controller
* virtio-autoassign.args
Filling out the address when no <address> is specified.
Started using all the controllers instead of 0, also discards
the bus value.
* xml -> xml output of virtio-auto
The port assignment is no longer done as a part of XML parsing,
so the unspecified values stay 0.
https://bugzilla.redhat.com/show_bug.cgi?id=1206479
As described in virDomainBlockCopy() parameters description, the
VIR_DOMAIN_BLOCK_COPY_GRANULARITY parameter may require the value to
have some specific attributes (e.g. be a power of two or fall within a
certain range). And in qemu, a power of two is required. However, our
code does not check that and let qemu operation fail. Moreover, the
virsh man page is not as exact as it could be in this respect.
Signed-off-by: Luyao Huang <lhuang@redhat.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
When we shutdown/reboot a guest using agent-mode, if the guest itself blocks infinitely,
libvirt would block in qemuAgentShutdown() forever.
Thus, we set a timeout for shutdown/reboot, from our experience, 60 seconds would be fine.
Signed-off-by: Zhang Bo <oscar.zhangbo@huawei.com>
Signed-off-by: Wang Yufei <james.wangyufei@huawei.com>
virDomainHasDiskMirror() currently detects only jobs that add the mirror
elements. Since some operations like migration are interlocked by
existing block jobs on the given domain the check needs to be
instrumented to check regular jobs too.
This patch renames virDomainHasDiskMirror to virDomainHasDiskBlockjob
and adds an argument that allows to select that it returns true only for
block copy jobs as those interlock making the domain persistent.
Other two uses trigger on any block job type.
Signed-off-by: Shanzhi Yu <shyu@redhat.com>
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
If any disk of a VM was involved in a (copy) block job we refused to do
a snapshot. As not only copy jobs interlock snapshots and the
interlocking is applicable to individual disks only we can make the
check in a more individual fashion and interlock all block job types
supported by libvirt.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1203628
In the order of appearance:
* MAX_LISTEN - never used
added by 23ad665c (qemud) and addec57 (lock daemon)
* NEXT_FREE_CLASS_ID - never used, added by 07d1b6b
* virLockError - never used, added by eb8268a4
* OPENVZ_MAX_ARG, CMDBUF_LEN, CMDOP_LEN
unused since the removal of ADD_ARG_LIT in d8b31306
* QEMU_NB_PER_CPU_STAT_PARAM - unused since 897808e
* QEMU_CMD_PROMPT, QEMU_PASSWD_PROMPT - unused since 1dc10a7
* TEST_MODEL_WORDSIZE - unused since c25c18f7
* TEMPDIR - never used, added by 714bef5
* NSIG - workaround around old headers
added by commit 60ed1d2
unused since virExec was moved by commit 02e8691
* DO_TEST_PARSE - never used, added by 9afa006
* DIFF_MSEC, GETTIMEOFDAY - unused since eee6eb6
Two places would call to qemuPrepareCpumap() with priv->autoNodeset to
convert it to a cpuset. Remove the function and use the prepared cpuset
automatically.
When the default cpuset or automatic numa placement is used libvirt
would place the whole parent cgroup in the specified cpuset. This then
disallowed to re-pin the vcpus to a different cpu.
This patch pins only the vcpu threads to the default cpuset and thus
allows to re-pin them later.
The following config would fail to start:
<domain type='kvm'>
...
<vcpu placement='static' cpuset='0-1' current='2'>4</vcpu>
<cputune>
<vcpupin vcpu='0' cpuset='2-3'/>
...
This is a regression since a39f69d2b.
When the synchronous pivot option is selected, libvirt would not update
the backing chain until the job was exitted. Some applications then
received invalid data as their job serialized first.
This patch removes polling to wait for the ABORT/PIVOT job completion
and replaces it with a condition. If a synchronous operation is
requested the update of the XML is executed in the job of the caller of
the synchronous request. Otherwise the monitor event callback uses a
separate worker to update the backing chain with a new job.
This is a regression since 1a92c71910
When the ABORT job is finished synchronously you get the following call
stack:
#0 qemuBlockJobEventProcess
#1 qemuDomainBlockJobImpl
#2 qemuDomainBlockJobAbort
#3 virDomainBlockJobAbort
While previously or while using the _ASYNC flag you'd get:
#0 qemuBlockJobEventProcess
#1 processBlockJobEvent
#2 qemuProcessEventHandler
#3 virThreadPoolWorker
Later on I'll be adding a condition that will allow to synchronise a
SYNC block job abort. The approach will require this code to be called
from two different places so it has to be extracted into a helper.
Commit 1a92c719 moved code to handle block job events to a different
function that is executed in a separate thread. The caller of
processBlockJob handles locking and unlocking of @vm, so the we should
not do it in the function itself.
The block copy API takes the speed in bytes/s rather than MiB/s that was
the prior approach in virDomainBlockRebase. We correctly converted the
speed to bytes/s in the old API but we still called the common helper
virDomainBlockCopyCommon with the unadjusted variable.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1207122
When getting info on NUMA parameters for domain,
virCgroupGetCpusetMems() may be called. However, as of 43b67f2e
the call is guarded by check if memory controller is present.
Even though it may be not obvious instantly, NUMA parameters are
stored under cpuset controller. Therefore the check needs to look
like this:
if (!virCgroupHasController(priv->cgroup,
VIR_CGROUP_CONTROLLER_CPUSET) ||
virCgroupGetCpusetMems(priv->cgroup, &nodeset) < 0) {
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Blockcopy to non-file destination is not supported according the code,
but a 'goto endjob' is missed after checking the destination.
This leads to calling drive-mirror with wrong parameters.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1206406
Signed-off-by: Shanzhi Yu <shyu@redhat.com>
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Starting a qemu VM with a memory module that has the base address
specified results in the following error:
error: internal error: early end of file from monitor: possible problem:
2015-03-26T03:45:52.338891Z qemu-kvm: -device pc-dimm,node=0,memdev=memdimm0,
id=dimm0,slot=0,base=4294967296: Property '.base' not found
The correct property name for the base address is 'addr'.
Signed-off-by: Luyao Huang <lhuang@redhat.com>
Because of the microcode update to Haswell/Broadwell CPUs, existing
domains using these CPUs may fail to start even though they used to run
just fine. To help users solve this issue we try to suggest switching to
-noTSX variant of the CPU model:
virsh # start cd
error: Failed to start domain cd
error: unsupported configuration: guest and host CPU are not
compatible: Host CPU does not provide required features: rtm, hle;
try using 'Haswell-noTSX' CPU model
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Use the virStorageSourceIsEmpty helper to determine whether the drive
source is empty rather than checking for src->path. This will fix start
of VM with empty network cdrom that would not report any error.
The function that formats the string for network drives would return
error code but did not set the error message when called on storage
source with VIR_STORAGE_NET_PROTOCOL_LAST or _NONE.
Report an error in this case if it would ever be called in that way.
While adding tests for status XML parsing and formatting I've noticed
that the device alias list is leaked.
==763001== 81 (48 direct, 33 indirect) bytes in 1 blocks are definitely lost in loss record 414 of 514
==763001== at 0x4C2B8F0: calloc (vg_replace_malloc.c:623)
==763001== by 0x6ACF70F: virAllocN (viralloc.c:191)
==763001== by 0x447B64: qemuDomainObjPrivateXMLParse (qemu_domain.c:727)
==763001== by 0x6B848F9: virDomainObjParseXML (domain_conf.c:15491)
==763001== by 0x6B84CAC: virDomainObjParseNode (domain_conf.c:15608)
When starting a VM with hotpluggable memory devices the user may specify
an invalid source NUMA node. Libvirt would pass through the error from
qemu:
# virsh start test3
error: Failed to start domain test3
error: internal error: process exited while connecting to monitor:
2015-03-25T01:12:17.205913Z qemu-kvm: -object memory-backend-ram,id=memdimm0
,size=536870912,host-nodes=1-3,policy=bind: cannot bind memory to host NUMA nodes:
Invalid argument
This patch adds a check that allows to report better error:
# virsh start test3
error: Failed to start domain test3
error: configuration unsupported: NUMA node 1 is unavailable
Signed-off-by: Luyao Huang <lhuang@redhat.com>
This is very helpful when we want to log and report why we could not
acquire a state change lock. Reporting what job keeps it locked helps
with understanding the issue. Moreover, after calling
virDomainGetControlInfo, it's possible to tell whether libvirt is just
stuck somewhere within the API (or it just forgot to cleanup the job) or
whether libvirt is waiting for QEMU to reply.
The error message will look like the following:
# virsh resume cd
error: Failed to resume domain cd
error: Timed out during operation: cannot acquire state change lock
(held by remoteDispatchDomainSuspend)
https://bugzilla.redhat.com/show_bug.cgi?id=853839
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
We don't have to modify cpuset.mems on hosts without NUMA. It also
fixes an error message that you get instead of success if you trying
update vcpus of a guest on a host without NUMA.
error: internal error: NUMA isn't available on this host
Signer-off-by: Pavel Hrdina <phrdina@redhat.com>
We should call virDomainLiveConfigHelperMethod ASAP because this
function transfers VIR_DOMAIN_AFFECT_CURRENT to VIR_DOMAIN_AFFECT_LIVE
or VIR_DOMAIN_AFFECT_CONFIG. All other additional checks for those two
flags should consider that the user give us VIR_DOMAIN_AFFECT_CURRENT.
Remove the unnecessary check whether the domain is live in case of
VIR_DOMAIN_VCPU_GUEST because this check is done by
virDomainLiveConfigHelperMethod.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
by rewriting it completely from:
error: unsupported configuration: virtio only support device address
type 'PCI'
to:
error: unsupported configuration: virtio disk cannot have an address of type
drive
Since we now support CCW addresses as well.
While debugging the support for responding to qemu RX_FILTER_CHANGED
events, I had changed the "ignoring this event" log message from
VIR_DEBUG to VIR_WARN, but forgot to change it back before
pushing. Since many guest OSes make enough changes to multicast lists
and/or promiscuous mode settings to trigger this message, it's
starting to show up as a red herring in bug reports.
Add a few helpers that allow to operate with memory device definitions
on the domain config and use them to implement memory device coldplug in
the qemu driver.
Add support to start qemu instance with 'pc-dimm' device. Thanks to the
refactors we are able to reuse the existing function to determine the
parameters.
Make sure that libvirt has all vital information needed to reliably
represent configuration of guest's memory devices in case of a
migration.
This patch forbids migration in case the required slot number and module
base address are not present (failed to be loaded from qemu via
monitor).
When using 'dimm' memory devices with qemu, some of the information
like the slot number and base address need to be reloaded from qemu
after process start so that it reflects the actual state. The state then
allows to use memory devices across migrations.
This patch adds code that parses and formats configuration for memory
devices.
A simple configuration would be:
<memory model='dimm'>
<target>
<size unit='KiB'>524287</size>
<node>0</node>
</target>
</memory>
A complete configuration of a memory device:
<memory model='dimm'>
<source>
<pagesize unit='KiB'>4096</pagesize>
<nodemask>1-3</nodemask>
</source>
<target>
<size unit='KiB'>524287</size>
<node>1</node>
</target>
</memory>
This patch preemptively forbids use of the <memory> device in individual
drivers so the users are warned right away that the device is not
supported.
To enable memory hotplug the maximum memory size and slot count need to
be specified. As qemu supports now other units than mebibytes when
specifying memory, use the new interface in this case.
Add a XML element that will allow to specify maximum supportable memory
and the count of memory slots to use with memory hotplug.
To avoid possible confusion and misuse of the new element this patch
also explicitly forbids the use of the maxMemory setting in individual
drivers's post parse callbacks. This limitation will be lifted when the
support is implemented.
In the last section if the function determines that the config is
invalid when QEMU doesn't support the memory device the JSON config
object would be returned even if it doesn't make sense.
Assign the object to be returned only on success.
When no model is specified in the domain definition for
a scsi controller and the architectur is s390 than virtio-scsi
is set as default model.
Signed-off-by: Boris Fiuczynski <fiuczy@linux.vnet.ibm.com>
Reviewed-by: Daniel Hansel <daniel.hansel@linux.vnet.ibm.com>
Reviewed-by: Stefan Zimmermann <stzi@linux.vnet.ibm.com>
Reviewed-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Commit cf54c60699 introduced the ability
to create missing storage volumes during migration. For network disks,
however, we may not necessarily be able to detect whether they already
exist -- there is no straight-forward way to map the disk to a storage
volume, and even if there were it's possible no configured storage pool
actually contains the disk.
It is better to assume the network disk exists in this case, rather than
aborting the migration completely. If the volume really is missing, QEMU
will generate an appropriate error later in the migration.
Signed-off-by: Michael Chapman <mike@very.puzzling.org>
Wikipedia's list of common misspellings [1] has a machine-readable
version. This patch fixes those misspellings mentioned in the list
which don't have multiple right variants (as e.g. "accension", which can
be both "accession" and "ascension"), such misspellings are left
untouched. The list of changes was manually re-checked for false
positives.
[1] https://en.wikipedia.org/wiki/Wikipedia:Lists_of_common_misspellings/For_machines
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
We've never set the cpuset.memory_migrate value to anything, keeping it
on default. However, we allow changing cpuset.mems on live domain.
That setting, however, don't have any consequence on a domain unless
it's going to allocate new memory.
I managed to make 'virsh numatune' move all the memory to any node I
wanted even without disabling libnuma's numa_set_membind(), so this
should be safe to use with it as well.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1198497
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
https://bugzilla.redhat.com/show_bug.cgi?id=1196934
When qemu exits during startup, libvirt includes the error from
/var/log/libvirt/qemu/vm.log in the error message:
$ virsh start test3
error: Failed to start domain test3
error: internal error: early end of file from monitor: possible problem:
2015-02-27T03:03:16.985494Z qemu-kvm: -numa memdev is not supported by
machine rhel6.5.0
The check for domain liveness added to qemuDomainObjExitMonitor
in commit dc2fd51f sometimes overwrites this error:
$ virsh start test3
error: Failed to start domain test3
error: operation failed: domain is no longer running
Fix the check to only report an error if there is none set.
Signed-off-by: Luyao Huang <lhuang@redhat.com>
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Issue #1 - A call to virBitmapNew did not check if the allocation
failed which could lead to a NULL dereference
Issue #2 - When deleting the pin entries from the config file, the
code loops from the number of elements down to the "new" vcpu count;
however, the pin id values are numbered 0..n-1 not 1..n, so the "first"
pin attempt would never work. Luckily the check was for whether the
incoming 'n' (vcpu id) matched the entry in the array from 0..arraysize
rather than a dereference of the 'n' entry
In qemu 2.3, the migration status will include 'cancelling' in the
window between when an asynchronous cancel has been requested and
when the migration is actually halted. Previously, qemu hid this
state and reported 'active'. Libvirt manages the sequence okay
even when the string is unrecognized (that is, it will report an
unknown state:
Migration: [ 69 %]^Cerror: internal error: unexpected migration status in cancelling.
but the migration is still cancelled), but recognizing the string
makes for a smoother user experience.
* src/qemu/qemu_monitor.h
(QEMU_MONITOR_MIGRATION_STATUS_CANCELLING): Add enum.
* src/qemu/qemu_monitor.c (qemuMonitorMigrationStatus): Map it.
* src/qemu/qemu_migration.c (qemuMigrationUpdateJobStatus): Adjust
clients.
* src/qemu/qemu_monitor_json.c
(qemuMonitorJSONGetMigrationStatusReply): Likewise.
Signed-off-by: Eric Blake <eblake@redhat.com>
virnetdevopenvswitch.h declares a few functions that can be called to
add ports to and remove them from OVS bridges, and retrieve the
migration data for a port. It does not contain any data definitions
that are used by domain_conf.h. But for some reason, domain_conf.h
virnetdevopenvswitch.h should be directly #including it. This adds a
few lines to the project, but saves all the files that don't need it
from the extra computing, and makes the dependencies more clear cut.
Problem Description:
When we set boot order for a vhost-user network interface, we found the boot index
doesn't work.
Cause of the Problem:
In the function qemuBuildVhostuserCommandLine(), it forcely set the arg bootindex of
function qemuBuildNicDevStr() to 0. Thus, the bootindex parameter got missing.
Solution:
Trans the arg bootindex down.
Signed-off-by: Gao Haifeng <gaohaifeng.gao@huawei.com>
Signed-off-by: Zhang Bo <oscar.zhangbo@huawei.com>
When libvirt is starting a domain, it reports the state as SHUTOFF until
it's RUNNING. This is not ideal because domain startup may take a long
time (usually because of some configuration issues, firewalls blocking
access to network disks, etc.) and domain lists provided by libvirt look
awkward. One can see weird shutoff domains with IDs in a list of active
domains or even shutoff transient domains. In any case, it looks more
like a bug in libvirt than a normal state a domain goes through.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
The function needs a pointer to the network to get list of DHCP
leases. The pointer is obtained via virNetworkLookupByName() which
requires callers to free the returned network once no longer needed.
Otherwise it's leaked.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Now that we allow HW address to be not present on our RPC layer,
don't error out if qemu-ga hasn't provided any.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
https://bugzilla.redhat.com/show_bug.cgi?id=1199182 documents that
after a series of disk snapshots into existing destination images,
followed by active commits of the top image, it is possible for
qemu 2.2 and earlier to end up tracking a different name for the
image than what it would have had when opening the chain afresh.
That is, when starting with the chain 'a <- b <- c', the name
associated with 'b' is how it was spelled in the metadata of 'c',
but when starting with 'a', taking two snapshots into 'a <- b <- c',
then committing 'c' back into 'b', the name associated with 'b' is
now the name used when taking the first snapshot.
Sadly, older qemu doesn't know how to treat different spellings of
the same filename as identical files (it uses strcmp() instead of
checking for the same inode), which means libvirt's attempt to
commit an image using solely the names learned from qcow2 metadata
fails with a cryptic:
error: internal error: unable to execute QEMU command 'block-commit': Top image file /tmp/images/c/../b/b not found
even though the file exists. Trying to teach libvirt the rules on
which name qemu will expect is not worth the effort (besides, we'd
have to remember it across libvirtd restarts, and track whether a
file was opened via metadata or via snapshot creation for a given
qemu process); it is easier to just always directly ask qemu what
string it expects to see in the first place.
As a safety valve, we validate that any name returned by qemu
still maps to the same local file as we have tracked it, so that
a compromised qemu cannot accidentally cause us to act on an
incorrect file.
* src/qemu/qemu_monitor.h (qemuMonitorDiskNameLookup): New
prototype.
* src/qemu/qemu_monitor_json.h (qemuMonitorJSONDiskNameLookup):
Likewise.
* src/qemu/qemu_monitor.c (qemuMonitorDiskNameLookup): New function.
* src/qemu/qemu_monitor_json.c (qemuMonitorJSONDiskNameLookup)
(qemuMonitorJSONDiskNameLookupOne): Likewise.
* src/qemu/qemu_driver.c (qemuDomainBlockCommit)
(qemuDomainBlockJobImpl): Use it.
Signed-off-by: Eric Blake <eblake@redhat.com>
Use the utilities introduced in the previous patches so the qemu
driver is able to create tap devices that are bound (and unbound
on domain destroyal) to Midonet virtual ports.
Signed-off-by: Antoni Segura Puimedon <toni+libvirt@midokura.com>
Only selected fields from the disk source were copied when cold updating
source in a CDROM drive. When such drive was backed by a network file
this resulted into corruption of the definition:
<disk type='network' device='cdrom'>
<driver name='qemu' type='raw' cache='none'/>
<source protocol='gluster' name='gluster-vol1(null)'>
<host name='localhost'/>
</source>
<target dev='vdc' bus='virtio'/>
<readonly/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x0a' function='0x0'/>
</disk>
Update the whole source instead of cherry-picking elements.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1166024
By querying the qemu guest agent with the QMP command
"guest-network-get-interfaces" and converting the received JSON
output to structured objects.
Although "ifconfig" is deprecated, IP aliases created by "ifconfig"
are supported by this API. The legacy syntax of an IP alias is:
"<ifname>:<alias-name>". Since we want all aliases to be clubbed
under parent interface, simply stripping ":<alias-name>" suffices.
Note that IP aliases formed by "ip" aren't visible to "ifconfig",
and aliases created by "ip" do not have any specific name. But
we are lucky, as qemu guest agent detects aliases created by both.
src/qemu/qemu_agent.h:
* Define qemuAgentGetInterfaces
src/qemu/qemu_agent.c:
* Implement qemuAgentGetInterface
src/qemu/qemu_driver.c:
* New function qemuGetDHCPInterfaces
* New function qemuDomainInterfaceAddresses
src/remote_protocol-sructs:
* Define new structs
tests/qemuagenttest.c:
* Add new test: testQemuAgentGetInterfaces
Test cases for IP aliases, 0 or multiple ipv4/ipv6 address(es)
Signed-off-by: Nehal J Wani <nehaljw.kkd1@gmail.com>
We're parsing memballoon status period as unsigned int, but when we're
trying to set it, both we and qemu use signed int. That means large
values will get wrapped around to negative one resulting in error.
Basically the same problem as commit e3a7b874 was dealing with when
updating live domain.
QEMU changed the accepted value to int64 in commit 1f9296b5, but even
values as INT_MAX don't make sense since the value passed means seconds.
Hence adding capability flag for this change isn't worth it.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1140958
Signed-off-by: Luyao Huang <lhuang@redhat.com>
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
In order not to leave old error messages set, this patch refactors the
code so the error is reported only when acted upon. The only such place
already rewrites any error, so cleaning up all the error reporting in
qemuMonitorSetMemoryStatsPeriod() is enough.
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
Patch 51f9f03a4c introduces a regression
where if a blockCommit operation fails the disk is still marked as being
part of a block job but can't be unmarked later.
As pointed out by jtomko in his review of the IOThreads pinning code:
http://www.redhat.com/archives/libvir-list/2015-March/msg00495.html
there are some comments sprinkled in indicating IOThreads were using
the same structure as the VcpuPin code...
This is the first patch of a few that will change the virDomainVcpuPin*
structures and code to just virDomainPin* - starting with the data
structure naming...
During his review of the iothreads pin setting code, Pavel noted that
there was a potential memory leak with respect to how the newVcpuPin
is handled and the goto endjob's in failure paths which would not free
the memory. For reference, See:
http://www.redhat.com/archives/libvir-list/2015-March/msg00415.html
The memory sizes in qemu are aligned up to 1 MiB boundaries. There are
two places where this was done once for the total size and then for
individual NUMA cell sizes.
Add a function that will align the sizes in one place so that it's clear
where the sizes are aligned.
As there are two possible approaches to define a domain's memory size -
one used with legacy, non-NUMA VMs configured in the <memory> element
and per-node based approach on NUMA machines - the user needs to make
sure that both are specified correctly in the NUMA case.
To avoid this burden on the user I'd like to replace the NUMA case with
automatic totaling of the memory size. To achieve this I need to replace
direct access to the virDomainMemtune's 'max_balloon' field with
two separate getters depending on the desired size.
The two sizes are needed as:
1) Startup memory size doesn't include memory modules in some
hypervisors.
2) After startup these count as the usable memory size.
Note that the comments for the functions are future aware and document
state that will be present after a few later patches.
Surprisingly we did not grab a VM job when a block job finished and we'd
happily rewrite the backing chain data. This made it possible to crash
libvirt when queueing two backing chains tightly and other badness.
To fix it, add yet another handler to the helper thread that handles
monitor events that require a job.
We interpret port values as signed int (convert them from char *),
so if a negative value is provided in network disk's configuration,
we accept it as valid, however there's an 'unknown cause' error raised later.
This error is only accidental because we return the port value in the return code.
This patch adds just a minor tweak to the already existing check so we
reject negative values the same way as we reject non-numerical strings.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1163553
A helper that never returns an error and treats bits out of bitmap range
as false.
Use it everywhere we use ignore_value on virBitmapGetBit, or loop over
the bitmap size.
Now that qemuDomainBlocksStatsGather provides functions of both
qemuMonitorGetBlockStatsParamsNumber and qemuMonitorGetBlockStatsInfo we
can reuse it and kill a lot of code.
Additionally as a bonus qemuDomainBlockStatsFlags will now support
summary statistics so add a statement to the virsh man page about that.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1142636
In the LXC driver, if the disk path is not provided the API returns
total statistics for all disks of the domain. With the new text monitor
implementation this can be now done in the qemu driver too.
Add code that wil total the stats for all disks if the path is not
provided.
Extract the code to look up the disk alias and return the block stats
struct so that it can be reused later in qemuDomainBlockStatsFlags.
The function uses qemuMonitorGetAllBlockStatsInfo instead of
qemuMonitorGetBlockStatsInfo.
Our virDomainBlockStatsFlags API uses the old approach where, when it's
called without the typed parameter array, returns the count of parameters
supported by qemu.
The supported parameter count is obtained via separate monitor calls
which is a waste since we can calculate it when gathering the data.
This patch adds code to the qemuMonitorGetAllBlockStatsInfo workers that
allows to track the count of supported fields reported by qemu and will
allow to remove the old duplicate code.
The function that is extracting block stats data from the QMP monitor
reply contains a lot of repeated code. Since I'd be changing each of the
copies in the next patch, lets convert it to a macro right away.
Add a different version of parser for "info blockstats" that basically
parses the same information as the existing copy of the function.
This will allow us to remove the single device version
qemuMonitorGetBlockStatsInfo in the future.
The new implementation uses few new helpers so it should be more
understandable and provides a test case to verify that it works.
Allocate the hash table in the monitor wrapper function instead of the
worker itself so that the text monitor impl that will be added in the
next patch doesn't have to duplicate it.
Error messages are already set in all code paths returning -1 from
networkGetNetworkAddress, so we don't want to overwrite them.
Signed-off-by: Luyao Huang <lhuang@redhat.com>
Signed-off-by: John Ferlan <jferlan@redhat.com>
When creating qemu capabilities, a dummy virDomainObj is created just
because our monitor code expects that. However, the object is created
locked already. Then, under cleanup label, we simply unref the object
which results in whole domain object to be disposed. The object lock
is destroyed subsequently, but hey - it's still locked:
==24845== Thread #14's call to pthread_mutex_destroy failed
==24845== with error code 16 (EBUSY: Device or resource busy)
==24845== at 0x4C3024E: pthread_mutex_destroy (in /usr/lib64/valgrind/vgpreload_helgrind-amd64-linux.so)
==24845== by 0x531F72E: virMutexDestroy (virthread.c:83)
==24845== by 0x5302977: virObjectLockableDispose (virobject.c:237)
==24845== by 0x5302A89: virObjectUnref (virobject.c:265)
==24845== by 0x1DD37866: virQEMUCapsInitQMP (qemu_capabilities.c:3397)
==24845== by 0x1DD37CC6: virQEMUCapsNewForBinary (qemu_capabilities.c:3481)
==24845== by 0x1DD381E2: virQEMUCapsCacheLookup (qemu_capabilities.c:3609)
==24845== by 0x1DD30F8A: virQEMUCapsInitGuest (qemu_capabilities.c:744)
==24845== by 0x1DD31889: virQEMUCapsInit (qemu_capabilities.c:1020)
==24845== by 0x1DD7DD36: virQEMUDriverCreateCapabilities (qemu_conf.c:888)
==24845== by 0x1DDC57C0: qemuStateInitialize (qemu_driver.c:803)
==24845== by 0x53DC743: virStateInitialize (libvirt.c:777)
==24845==
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Commit 4bbe1029f fixed a problem in commit f7afeddc by moving the call
to virNetDevGetIndex() to a location common to all interface types (so
that the nicindex array would be filled in for macvtap as well as tap
interfaces), but the location was *too* common, as the original call
to virNetDevGetIndex() had been in a section qualified by "if
(cfg->privileged)". The result was that the "fixed" libvirtd would try
to call virNetDevGetIndex() even for session mode libvirtd, and end up
failing with the log message:
Unable to open control socket: Operation not permitted
To remedy that, this patch qualifies the call to virNetDevGetIndex()
in its new location with cfg->privileged.
This resolves https://bugzilla.redhat.com/show_bug.cgi?id=1198244
By adding a call and check of return of virBitmapToData to the
IOThreads code, my Coverity checker lets me know qemuDomainHelperGetVcpus
also needs to check the status...
Depending on the flags passed, either attempt to return the active/live
IOThread data for the domain or the config data.
The active/live path will call into the Monitor in order to get the
IOThread data and then correlate the thread_id's returned from the
monitor to the currently running system/threads in order to ascertain
the affinity for each iothread_id.
The config path will map each of the configured IOThreads and return
any configured iothreadspin data
Signed-off-by: John Ferlan <jferlan@redhat.com>
There was a mess in the way how we store unlimited value for memory
limits and how we handled values provided by user. Internally there
were two possible ways how to store unlimited value: as 0 value or as
VIR_DOMAIN_MEMORY_PARAM_UNLIMITED. Because we chose to store memory
limits as unsigned long long, we cannot use -1 to represent unlimited.
It's much easier for us to say that everything greater than
VIR_DOMAIN_MEMORY_PARAM_UNLIMITED means unlimited and leave 0 as valid
value despite that it makes no sense to set limit to 0.
Remove unnecessary function virCompareLimitUlong. The update of test
is to prevent the 0 to be miss-used as unlimited in future.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1146539
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Pass the TPM file descriptor to QEMU via command line.
Instead of passing /dev/tpm0 we now pass /dev/fdset/10 and the additional
parameters -add-fd set=10,fd=20.
This addresses the use case when QEMU is started with non-root privileges
and QEMU cannot open /dev/tpm0 for example.
Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
When the domain's source disk type is network, if source protocol is rbd
or sheepdog, the 'if().. break' will end the current case, which lead to
miss check the driver type is raw or qcow2. Libvirt will allow to create
internal snapshot for a running domain with raw format disk which based
on rbd storage.
While both protocols support internal snapshots of the disk qemu is not
able to use it as it requires some place to store the memory image. The
check if the disk is backed by a qcow2 image needs to be executed
always.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1179533
Signed-off-by: Shanzhi Yu <shyu@redhat.com>
Previously when a domain would get stuck in a domain job due to a
programming mistake we'd report the following control state:
$ virsh domcontrol domain
occupied (1424343406.150s)
The timestamp is invalid as the monitor was not entered for that domain.
We can use that to detect that the domain has an active job and report a
better error instead:
$ virsh domcontrol domain
error: internal (locking) error
https://bugzilla.redhat.com/show_bug.cgi?id=1197600
So, libvirt uses pid file to track pid of started qemus. Whenever
a domain is started, its pid is put into corresponding pid file.
The pid file path is generated based on domain name and stored
into domain object internals. However, it's not stored in the
status XML and therefore lost on daemon restarts. Hence, later,
when domain is being shut down, the daemon does not know which
pid file to unlink, and the correct pid file is left behind. To
avoid this, lets generate the pid file path again in
qemuProcessReconnect().
Reported-by: Luyao Huang <lhuang@redhat.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Instead of checking defaultMode for every channel that has no mode
configured, test it only once outside of channel loop. This fixes a bug
that in case all possible channels are fore example set to insecure, but
defaultMode is set to secure, we wouldn't auto-generate TLS port. This
results in failure while starting a guest.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1143832
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
We have two different places that needs to be updated while touching
code for allocation spice ports. Add a bool option to
'qemuProcessSPICEAllocatePorts' function to switch between true and fake
allocation so we can use this function also in qemu_driver to generate
native domain definition.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Since adding the support for scheduler policy settings in commit
8680ea97, there are two enums with the same information. That was
caused by rewriting the patch since first draft.
Find out thanks to clang, but there was no impact whatsoever.
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
The problem here was that when opening a channel, we were checking
whether the channel given is alias (can't be NULL for running domain) or
it's name, which can be NULL (for example with spicevmc). In case of
such domain qemuDomainOpenChannel() made the daemon crash.
STREQ_NULLABLE() is safe to use since the code in question is wrapped in
"if (name)" and is more readable, so use that instead of checking for
non-NULL "vm->def->channels[i]->target.name".
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
https://bugzilla.redhat.com/show_bug.cgi?id=1142631
This patch resolves a situation where the same "<target dev='$name'...>"
can be used for multiple disks in the domain.
While the $name is "mostly" advisory regarding the expected order that
the disk is added to the domain and not guaranteed to map to the device
name in the guest OS, it still should be unique enough such that other
domblk* type operations can be performed.
Without the patch, the domblklist will list the same Target twice:
$ virsh domblklist $dom
Target Source
------------------------------------------------
sda /var/lib/libvirt/images/file.qcow2
sda /var/lib/libvirt/images/file.img
Additionally, getting domblkstat, domblkerror, domblkinfo, and other block*
type calls will not be able to reference the second target.
Fortunately, hotplug disallows adding a "third" sda value:
$ qemu-img create -f raw /var/lib/libvirt/images/file2.img 10M
$ virsh attach-disk $dom /var/lib/libvirt/images/file2.img sda
error: Failed to attach disk
error: operation failed: target sda already exists
$
BUT, it since 'sdb' doesn't exist one would get the following on the same
hotplug attempt, but changing to use 'sdb' instead of 'sda'
$ virsh attach-disk $dom /var/lib/libvirt/images/file2.img sdb
error: Failed to attach disk
error: internal error: unable to execute QEMU command 'device_add': Duplicate ID 'scsi0-0-1' for device
$
Since we cannot fix this issue at parsing time, the best that can be done so
as to not "lose" a domain is to make the check prior to starting the guest
with the results as follows:
$ virsh start $dom
error: Failed to start domain $dom
error: XML error: target 'sda' duplicated for disk sources '/var/lib/libvirt/images/file.qcow2' and '/var/lib/libvirt/images/file.img'
$
Running 'make check' found a few more instances in the tests where this
duplicated target dev value was being used. These also exhibited some
duplicated 'id=' values (negating the uniqueness argument of aliases) in
the corresponding .args file and of course the *xmlout version of a few
input XML files.
NUMA enabled guest configuration explicitly specifies memory sizes for
individual nodes. Allowing the virDomainSetMemoryFlags API (and friends)
to change the total doesn't make sense as the individual node configs
are not updated in that case.
Forbid use of the API in case NUMA is specified.
If we combine the boot order on the command line with other
boot options, we prepend order= in front of it.
Instead of checking if the number of added arguments is between
0 and 2, separate the strings for boot order and options
and prepend boot order only if both strings are not empty.
Commit f7afeddc added code to report to systemd an array of interface
indexes for all tap devices used by a guest. Unfortunately it not only
didn't add code to report the ifindexes for macvtap interfaces
(interface type='direct') or the tap devices used by type='ethernet',
it ended up sending "-1" as the ifindex for each macvtap or hostdev
interface. This resulted in a failure to start any domain that had a
macvtap or hostdev interface (or actually any type other than
"network" or "bridge").
This patch does the following with the nicindexes array:
1) Modify qemuBuildInterfaceCommandLine() to only fill in the
nicindexes array if given a non-NULL pointer to an array (and modifies
the test jig calls to the function to send NULL). This is because
there are tests in the test suite that have type='ethernet' and still
have an ifname specified, but that device of course doesn't actually
exist on the test system, so attempts to call virNetDevGetIndex() will
fail.
2) Even then, only add an entry to the nicindexes array for
appropriate types, and to do so for all appropriate types ("network",
"bridge", and "direct"), but only if the ifname is known (since that
is required to call virNetDevGetIndex().
libvirt was unconditionally calling virNetDevBandwidthClear() for
every interface (and network bridge) of a type that supported
bandwidth, whether it actually had anything set or not. This doesn't
hurt anything (unless ifname == NULL!), but is wasteful.
This patch makes sure that all calls to virNetDevBandwidthClear() are
qualified by checking that the interface really had some bandwidth
setup done, and checks for a null ifname inside
virNetDevBandwidthClear(), silently returning success if it is null
(as well as removing the ATTRIBUTE_NONNULL from that function's
prototype, since we can't guarantee that it is never null,
e.g. sometimes a type='ethernet' interface has no ifname as it is
provided on the fly by qemu).
If the qemu binary on x86 does not support lsi SCSI controller,
but it supports virtio-scsi, we reject the virtio-specific attributes
for no reason.
Move the default controller assignment before the check.
https://bugzilla.redhat.com/show_bug.cgi?id=1168849
https://bugzilla.redhat.com/show_bug.cgi?id=1183869
Soo. you've successfully started yourself a domain. And since you want
to use it on your host exclusively you are confident enough to
passthrough the host CPU model, like this:
<cpu mode='host-passthrough'/>
Then, after a while, you want to save the domain into a file (e.g.
virsh save dom dom.save). And here comes the trouble. The file consist
of two parts: Libvirt header (containing domain XML among other
things), and qemu migration data. Now, the domain XML in the header is
formatted using special flags (VIR_DOMAIN_XML_SECURE |
VIR_DOMAIN_XML_UPDATE_CPU | VIR_DOMAIN_XML_INACTIVE |
VIR_DOMAIN_XML_MIGRATABLE).
Then, on your way back from the bar, you think of changing something
in the XML in the saved file (we have a command for it after all), say
listen address for graphics console. So you successfully type in the
command:
virsh save-image-edit dom.save
Change all the bits, and exit the editor. But instead of success
you're left with sad error message:
error: unsupported configuration: Target CPU model <null> does not
match source Pentium Pro
Sigh. Digging into the code you see lines, where we check for ABI
stability. The new XML you've produced is compared with the old one
from the saved file to see if qemu ABI will break or not. Wait, what?
We are using different flags to parse the XML you've provided so we
were just lucky it worked in some cases? Yep, that's right.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
In commit cc41c648 I've re-factored qemuMonitorFindBalloonObjectPath, but
missed that there is a memory leak. The "nextpath" variable is
overwritten while looping in for cycle and we have to free it before next
cycle.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Making use of the ARCH_IS_S390 macro introduced with
e808357528
Signed-off-by: Stefan Zimmermann <stzi@linux.vnet.ibm.com>
Reviewed-by: Boris Fiuczynski <fiuczy@linux.vnet.ibm.com>
Since s390 does not support usb the default creation of a usb controller
for a domain should not occur.
Also adjust s390 test cases by removing usb device instances since
usb devices are no longer created by default for s390 the s390
test cases need to be adjusted.
Signed-off-by: Stefan Zimmermann <stzi@linux.vnet.ibm.com>
Reviewed-by: Boris Fiuczynski <fiuczy@linux.vnet.ibm.com>
For historical reasons data regarding NUMA configuration were split
between the CPU definition and numatune. We cannot do anything about the
XML still being split, but we certainly can at least store the relevant
data in one place.
This patch moves the NUMA stuff to the right place.
As virDomainNumatuneSet now doesn't allocate the virDomainNuma object
any longer it's not necessary to pass the pointer to a pointer to store
the object as it will not change any longer.
While touching the parameter definitions I've also changed the name of
the parameter to "numa".
Name it virNumaMemAccess and add it to conf/numa_conf.[ch]
Note that to avoid a circular dependency the type of the NUMA cell
memAccess variable was changed to int. It will be turned back later
after the circular dependency will not exist.
Not all machine types support all devices, device properties, backends,
etc. So until we create a matrix of [machineType, qemuCaps], lets just
filter out some capabilities before we return them to the consumer
(which is going to make decisions based on them straight away).
Currently, as qemu is unable to tell which capabilities are (not)
enabled for given machine types, it's us who has to hardcode the matrix.
One day maybe the hardcoding will go away and we can create the matrix
dynamically on the fly based on a few monitor calls.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
https://bugzilla.redhat.com/show_bug.cgi?id=1179678
When migrating with storage, libvirt iterates over domain disks and
instruct qemu to migrate the ones we are interested in (shared, RO and
source-less disks are skipped). The disks are migrated in series. No
new disk is transferred until the previous one hasn't been quiesced.
This is checked on the qemu monitor via 'query-jobs' command. If the
disk has been quiesced, it practically went from copying its content
to mirroring state, where all disk writes are mirrored to the other
side of migration too. Having said that, there's one inherent error in
the design. The monitor command we use reports only active jobs. So if
the job fails for whatever reason, we will not see it anymore in the
command output. And this can happen fairly simply: just try to migrate
a domain with storage. If the storage migration fails (e.g. due to
ENOSPC on the destination) we resume the host on the destination and
let it run on partly copied disk.
The proper fix is what even the comment in the code says: listen for
qemu events instead of polling. If storage migration changes state an
event is emitted and we can act accordingly: either consider disk
copied and continue the process, or consider disk mangled and abort
the migration.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Upon BLOCK_JOB_COMPLETED event delivery, we check if the job has
completed (in qemuMonitorJSONHandleBlockJobImpl()). For better image,
the event looks something like this:
"timestamp": {"seconds": 1423582694, "microseconds": 372666}, "event":
"BLOCK_JOB_COMPLETED", "data": {"device": "drive-virtio-disk0", "len":
8412790784, "offset": 409993216, "speed": 8796093022207, "type":
"mirror", "error": "No space left on device"}}
If "len" does not equal "offset" it's considered an error, and we can
clearly see "error" field filled in. However, later in the event
processing this case was handled no differently to case of job being
aborted via separate API. It's time that we start differentiate these
two because of the future work.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Currently, upon BLOCK_JOB_* event, disk->mirrorState is not updated
each time. The callback code handling the events checks if a blockjob
was started via our public APIs prior to setting the mirrorState.
However, some block jobs may be started internally (e.g. during
storage migration), in which case we don't bother with setting
disk->mirror (there's nothing we can set it to anyway), or other
fields. But it will come handy if we update the mirrorState in these
cases too. The event wasn't delivered just for fun - we've started the
job after all.
So, in this commit, the mirrorState is set to whatever job status
we've obtained. Of course, there are some actions on some statuses
that we want to perform. But instead of if {} else if {} else {} ...
enumeration, let's move to switch().
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
If 'virNumaGetHostNodeset()' fails then the error path will try to free
uninitialized pointer mem_mask. Introduced by commit af2a1f058.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
PowerPC : Forbid NULL CPU model with 'host-model' mode in qemu command line.
This ensures that an XML such as following:
...
<cpu mode='host-model'>
<model fallback='allow'/>
</cpu>
...
will not generate a '-cpu host,compat=(null)' command line with qemu-system-ppc64.
Signed-off-by: Prerna Saxena <prerna@linux.vnet.ibm.com>
PowerPC : Explicitly associate 'qemu-system-ppc64' as the
default emulator for all 64-bit PowerPC guests ( both Big & Little Endian )
Signed-off-by: Prerna Saxena <prerna@linux.vnet.ibm.com>
https://bugzilla.redhat.com/show_bug.cgi?id=1126762
Commit 43b67f introduced a deadlock issue when we use numatune
to change numa settings to a vm in session mode.
Jump to endjob instead of jump to cleanup.
Signed-off-by: Luyao Huang <lhuang@redhat.com>
So, when building the '-numa' command line, the
qemuBuildMemoryBackendStr() function does quite a lot of checks to
chose the best backend, or to check if one is in fact needed. However,
it returned that backend is needed even for this little fella:
<numatune>
<memory mode="strict" nodeset="0,2"/>
</numatune>
This can be guaranteed via CGroups entirely, there's no need to use
memory-backend-ram to let qemu know where to get memory from. Well, as
long as there's no <memnode/> element, which explicitly requires the
backend. Long story short, we wouldn't have to care, as qemu works
either way. However, the problem is migration (as always). Previously,
libvirt would have started qemu with:
-numa node,memory=X
in this case and restricted memory placement in CGroups. Today, libvirt
creates more complicated command line:
-object memory-backend-ram,id=ram-node0,size=X
-numa node,memdev=ram-node0
Again, one wouldn't find anything wrong with these two approaches.
Both work just fine. Unless you try to migrated from the older libvirt
into the newer one. These two approaches are, unfortunately, not
compatible. My suggestion is, in order to allow users to migrate, lets
use the older approach for as long as the newer one is not needed.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
We do have a check for valid per-domain security model, however we still
do permit an invalid security model for a domain's device (those which
are specified with <source> element).
This patch introduces a new function virSecurityManagerCheckAllLabel
which compares user specified security model against currently
registered security drivers. That being said, it also permits 'none'
being specified as a device security model.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1165485
Signed-off-by: Ján Tomko <jtomko@redhat.com>
The qemuDomainHelperGetVcpus attempted to report an error when the
vcpupids info was NULL. Unfortunately earlier code would clamp the
value of 'maxinfo' to 0 when nvcpupids was 0, so the error reporting
would end up being skipped.
This lead to 'virsh vcpuinfo <dom>' just returning an empty list
instead of giving the user a clear error.
If a previous commit I fixed the incorrect handling of vcpu pids
for TCG mode QEMU:
commit b07f3d821d
Author: Daniel P. Berrange <berrange@redhat.com>
Date: Thu Dec 18 16:34:39 2014 +0000
Don't setup fake CPU pids for old QEMU
The code assumes that def->vcpus == nvcpupids, so when we setup
fake CPU pids for old QEMU with nvcpupids == 1, we cause the
later code to read off the end of the array. This has fun results
like sche_setaffinity(0, ...) which changes libvirtd's own CPU
affinity, or even better sched_setaffinity($RANDOM, ...) which
changes the affinity of a random OS process.
The intent was that this would merely disable the ability to set
per-vCPU affinity. It should still have been possible to set VM
level host CPU affinity.
Unfortunately, when you set <vcpu cpuset='0-1'>4</vcpu>, the XML
parser will internally take this & initialize an entry in the
def->cputune.vcpupin array for every VCPU. IOW this is implicitly
being treated as
<cputune>
<vcpupin cpuset='0-1' vcpu='0'/>
<vcpupin cpuset='0-1' vcpu='1'/>
<vcpupin cpuset='0-1' vcpu='2'/>
<vcpupin cpuset='0-1' vcpu='3'/>
</cputune>
Even more fun, the faked cputune elements are hidden from view when
querying the live XML, because their cpuset mask is the same as the
VM default cpumask.
The upshot was that it was impossible to set VM level CPU affinity.
To fix this we must update qemuProcessSetVcpuAffinities so that it
only reports a fatal error if the per-VCPU cpu mask is different
from the VM level cpu mask.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
In the event we're falling into the code that tries to create the file
in a forked environment (VIR_FILE_OPEN_FORK) we pass different mode bits,
but those are never set because the virFileOpenForceOwnerMode has a check
if the OPEN_FORCE_MODE bit is set before attempting to change the mode.
Since this is a special case it seems reasonable to set u+rw,g+rw,o
https://bugzilla.redhat.com/show_bug.cgi?id=1191355
When we attempt to migrate a vm with a migrateuri that has no scheme:
# virsh migrate test4 --live qemu+ssh://lhuang/system --migrateuri 127.0.0.1
target libvirtd will crash because uri->scheme is NULL in
qemuMigrationPrepareDirect on this line:
if (STRNEQ(uri->scheme, "tcp") &&
Add a value check before this line. Also fix a bug like this in
doNativeMigrate, that could only happen when destination libvirtd
returned an incorrect URI.
Signed-off-by: Luyao Huang <lhuang@redhat.com>
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Export the required helpers and add backend code to hotplug RNG devices.
Signed-off-by: Luyao Huang <lhuang@redhat.com>
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
As the RNG device is using an -object as backend refactor the code to
use the JSON to commandline generator so that we can reuse the code
later in hotplug.
Move the alias name right after the object type for rng-egd backend so
that we can later use the JSON to commandline generator to create the
command line.
Libvirt didn't prefix the random number generator backend object alias
with any string thus the device alias and object alias were identical.
To avoid possible problems, rename the alias for the backend object and
tweak tests to comply with the change.
Signed-off-by: Luyao Huang <lhuang@redhat.com>
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Rename qemuBuildRNGDeviceArgs to qemuBuildRNGDevStr and change the
return type so that it can be reused in the device hotplug code later.
Signed-off-by: Luyao Huang <lhuang@redhat.com>
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
This function is used to assign an alias for a RNG device. It will be
later reused when hotplugging RNGs.
Signed-off-by: Luyao Huang <lhuang@redhat.com>
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
It is only usable for NETWORK and BRIDGE type interfaces.
Error out when trying to start a domain where the custom
tap device path is specified for interfaces of other types,
or when the daemon is not privileged.
Note that this cannot be checked at definition time, because
the comparison is against actual type.
https://bugzilla.redhat.com/show_bug.cgi?id=1147195
It is often helpful to know which version of libvirt and QEMU
was present when a guest was first launched. Ensure this info
is written into the QEMU log file for each guest.
Add the missing jump to the error label when the uuid in the
migration cookie XML does not match the uuid of the migrated
domain.
Signed-off-by: Luyao Huang <lhuang@redhat.com>
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Some code paths have special logic depending on the page size
reported by sysconf, which in turn affects the test results.
We must mock this so tests always have a consistent page size.
Change done by commit f309db1f4d wrongly
assumes that qemu can start with a combination of NUMA nodes specified
with the "memdev" option and the appropriate backends, and the legacy
way by specifying only "mem" as a size argument. QEMU rejects such
commandline though:
$ /usr/bin/qemu-system-x86_64 -S -M pc -m 1024 -smp 2 \
-numa node,nodeid=0,cpus=0,mem=256 \
-object memory-backend-ram,id=ram-node1,size=12345 \
-numa node,nodeid=1,cpus=1,memdev=ram-node1
qemu-system-x86_64: -numa node,nodeid=1,cpus=1,memdev=ram-node1: qemu: memdev option must be specified for either all or no nodes
To fix this issue we need to check if any of the nodes requires the new
definition with the backend and if so, then all other nodes have to use
it too.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1182467
With the new JSON to argv formatter we are now able to represent the
memory backend definitions in the JSON object format that is reusable
for monitor use (hotplug) and then convert it into the shell string.
This will avoid having two separate instances of the same code that
would create the different formats.
Previous refactors now allow to make this step without changes to the
test suite.
QEMU's command line visitor as well as the JSON interface take bytes by
default for memory object sizes. Convert mebibytes to bytes so that we
can later refactor the existing code for hotplug purposes.
QEMU's qapi visitor code allows yes/on/y for true and no/off/n for false
value of boolean properities. Unify the used style so that we can
generate it later and fix test cases.
Extract the memory backend device code into a separate function so that
it can be later easily refactored and reused.
Few small changes for future reusability, namely:
- new (currently unused) parameter for user specified page size
- size of the memory is specified in kibibytes, divided up in the
function
- new (currently unused) parameter for user specifed source nodeset
- option to enforce capability check
Unlike -device, qemu uses a JSON object to add backend "objects" via the
monitor rather than the string that would be passed on the commandline.
To be able to reuse code parts that configure backends for various
devices, this patch adds a helper that will allow generating the command
line representations from the JSON property object.
This patch enables synchronization of the host macvtap
device options with the guest device's in response to the
NIC_RX_FILTER_CHANGED event.
The following device options will be synchronized:
* PROMISC
* MULTICAST
* ALLMULTI
Signed-off-by: Tony Krowiak <akrowiak@linux.vnet.ibm.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
https://bugzilla.redhat.com/show_bug.cgi?id=1158034
If we're expecting to create a file somewhere and that fails for some
reason during qemuOpenFileAs, then we unlink the path we're attempting
to create leaving no way to determine what the "existing" privileges,
protections, or labels are that caused the failure (open, change owner
and group, change mode, etc.).
Furthermore, if we fall into the path where we'll be opening / creating
the file using VIR_FILE_OPEN_FORK, we need to first unlink/delete the file
we created in the first path; otherwise, the attempt by the child process
to open as some specific user:group may fail because the file was already
created using nfsnobody:nfsnobody. Again, if we didn't create the file we
don't want to blindly delete what already exists. Thus, a second reason for
the original check to set need_unlink to false when we find the file with
CREAT set, but already existing.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Commit id '540c339a' to fix issues with reference counting and transient
domains moved the qemuDomainObjEndAsyncJob call prior to the attempt to
restart the guest CPU's resulting in an error:
error: Failed to save domain rhel70 to /tmp/pl/rhel70.save
error: internal error: unexpected async job 3
when (ret != 0) - eg, the error path from qemuDomainSaveMemory.
This patch will adjust the logic to call the EndAsyncJob only after
we've tried to restart the guest CPUs. It also needs to adjust the
test for qemuDomainRemoveInactive to add the ret == 0 condition.
Additionally, if we get to endjob: because of some error earlier, then
we need to save that error in the event the CPU restart logic fails.
We don't want to return the error from CPU restart failure, rather we
want to return the error from the failed save that caused us to fall
into the retry to start the CPU logic.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Well, even though users can pass the list of UEFI:NVRAM pairs at the
configure time, we may maintain the list of widely available UEFI
ourselves too. And as arm64 begin to rises, OVMF was ported there too.
With a slight name change - it's called AAVMF, with AAVMF_CODE.fd
being the UEFI firmware and AAVMF_VARS.fd being the NVRAM store file.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Up until now there are just two ways how to specify UEFI paths to
libvirt. The first one is editing qemu.conf, the other is editing
qemu_conf.c and recompile which is not that fancy. So, new
configure option is introduced: --with-loader-nvram which takes a
list of pairs of UEFI firmware and NVRAM store. This way, the
compiled in defaults can be passed during compile time without
need to change the code itself.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
https://bugzilla.redhat.com/show_bug.cgi?id=1183890
When we try to update a xml to a image file, we will clear the
graphics passwd settings, because we do not pass VIR_DOMAIN_XML_SECURE
to qemuDomainDefCopy, qemuDomainDefFormatBuf won't format the passwd.
Add VIR_DOMAIN_XML_SECURE flag when we call qemuDomainDefCopy
in qemuDomainSaveImageUpdateDef.
Signed-off-by: Luyao Huang <lhuang@redhat.com>
https://bugzilla.redhat.com/show_bug.cgi?id=1161024
This way the device is in vmdef only if ret = 0 and the caller
(qemuDomainAttachDeviceFlags) does not free it.
Otherwise it might get double freed by qemuProcessStop
and qemuDomainAttachDeviceFlags if the domain crashed
in monitor after we've added it to vm->def.
Do the allocation first, then add the actual device.
The second part should never fail. This is good
for live hotplug where we don't want to remove the device
on OOM after the monitor command succeeded.
The only change in behavior is that on failure, the
vmdef->consoles array is freed, not just the first console.
For stateless, client side drivers, it is never correct to
probe for secondary drivers. It is only ever appropriate to
use the secondary driver that is associated with the
hypervisor in question. As a result the ESX & HyperV drivers
have both been forced to do hacks where they register no-op
drivers for the ones they don't implement.
For stateful, server side drivers, we always just want to
use the same built-in shared driver. The exception is
virtualbox which is really a stateless driver and so wants
to use its own server side secondary drivers. To deal with
this virtualbox has to be built as 3 separate loadable
modules to allow registration to work in the right order.
This can all be simplified by introducing a new struct
recording the precise set of secondary drivers each
hypervisor driver wants
struct _virConnectDriver {
virHypervisorDriverPtr hypervisorDriver;
virInterfaceDriverPtr interfaceDriver;
virNetworkDriverPtr networkDriver;
virNodeDeviceDriverPtr nodeDeviceDriver;
virNWFilterDriverPtr nwfilterDriver;
virSecretDriverPtr secretDriver;
virStorageDriverPtr storageDriver;
};
Instead of registering the hypervisor driver, we now
just register a virConnectDriver instead. This allows
us to remove all probing of secondary drivers. Once we
have chosen the primary driver, we immediately know the
correct secondary drivers to use.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
The code modifies the domain configuration but doesn't take a MODIFY
type job to do so.
This patch also fixes a few very long lines of code around the touched
parts.
For distros that want to add versioned machine types, they will add
(downstream) machine types like "virt-foo-1.2.3". Detect these as
MMIO too.
Signed-off-by: Richard W.M. Jones <rjones@redhat.com>
Previous patch of this series fixed the issue with adding a new PCI bridge
when all the slots were reserved by devices with user specified addresses.
In case there are still some PCI devices waiting to get a slot reserved
by qemuAssignDevicePCISlots, this means a new bus needs to be
created along with a corresponding bridge controller. By adding an
additional check, this scenario now results in a reasonable error
instead of generating wrong qemu command line.
Commit 93c8ca tried to fix the issue with auto-adding of a PCI bridge
controller, but didn't work properly in all scenarios.
This patch provides a better fix of the issue when all slots on a PCI bus
are reserved by devices with user specified addresses and no additional
bridges need to be created.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1132900
In order to be able to test for fully reserved PCI buses, assignment of
PCI slots for integrated devices needs to be moved to a separate function.
This also might be a good preparation if we decide to add support for
other chipsets as well.
Move qemuDomainAssignPCIAddresses after the definition
of the static function qemuDomainValidateDevicePCISlotsQ35.
This lets us define a new static function using
qemuDomainValidateDevicePCISlots* and use it in
qemuDomainAssignPCIAddresses without a forward declaration.
Signed-off-by: Ján Tomko <jtomko@redhat.com>
As it turned out, fix of dead code 419a22 changed the affected condition
from "never true" to "always true", so better fix would be to change the
return code of virDomainMaybeAddController from 0 to 1 if
a new bridge has been added, thus distinguishing case when we didn't need to
add any controller and case we successfully added one.
The return code is changed in the next commit
The ACL check didn't check the VIR_DOMAIN_XML_SECURE flag and the
appropriate permission for it. Found via code inspection while fixing
permissions for save images.
https://bugzilla.redhat.com/show_bug.cgi?id=1164627
When using 'virsh attach-device' to hotplug an unsupported console type
into a qemu guest the attachment would succeed as the command line
formatter didn't report error in such case.
Signed-off-by: Luyao Huang <lhuang@redhat.com>
https://bugzilla.redhat.com/show_bug.cgi?id=1130390
The listen address is not mandatory for <interface type='server'>
but when it's not specified, we've been formatting it as:
-netdev socket,listen=(null):5558,id=hostnet0
which failed with:
Device 'socket' could not be initialized
Omit the address completely and only format the port in the listen
attribute.
Also fix the schema to allow specifying a model.
Using the same driver multiple times is pointless and
it can result in confusing errors:
$ virsh start test
error: Failed to start domain test
error: internal error: security label already defined for VM
https://bugzilla.redhat.com/show_bug.cgi?id=1153891
