The flag can be used to enable zero-copy mechanism for migrating memory
pages.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Our documentation says RDMA migration requires hard_limit to be set so
that we know how big memory locking limit should be set for the domain
during migration. But since commit v1.2.13-71-gcf521fc8ba (which changed
the default hard_limit value from 0 to
VIR_DOMAIN_MEMORY_PARAM_UNLIMITED) we were actually setting memlock
limit to unlimited if hard_limit was not set.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
For RDMA migration we update memory locking limit, but never set it back
once migration finishes (on the destination host) or aborts (on the
source host).
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
This helper will not try to set the limit if it is already big enough,
which may be useful when libvirt daemon is running in a containerized
environment and is not allowed to change memory locking limit.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
qemuDomainAdjustMaxMemLock combined computing the desired limit with
applying it. This patch separates the code to apply a memory locking
limit to a new qemuDomainSetMaxMemLock helper for better reusability.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
For all file formats, the length of the size field is assumed
and hardcoded to be 8 bytes.
Fix the length for the ploop format - since we specify the offset,
we read 8 bytes of the length, not 0.
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Evaluate the XPath as a boolean, instead of trying to get a node
out of it.
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
The mailman for mailing lists hosted by Red Hat seems to have moved
to listman.redhat.com. While the old links still seem to work,
point our docs to the new location to avoid the redirect.
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Use VIR_AUTOCLOSE for the remaining file descriptor that uses
manual cleanup and remove the label.
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Use g_autofree for the two strings still using manual cleanup
and remove the pointless cleanup label.
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Convert all the cases where we can unconditionally free
the virURI at the end of scope.
In libxlDomainMigrationDstPrepare, uri is only filled
if uri_in was present, so moving the virURIFree out of
the condition is safe.
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
The result of the <= 0 comparison was assigned to 'rc', rendering the
if (rc == 0) condition dead code.
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
When domain startup fails, domain cleanup calls
libxlNetworkUnwindDevices, which calls virGetConnectNetwork, which
is a top level API entry point, which resets the initial saved error,
leading to clients seeing:
error: An error occurred, but the cause is unknown
This preserves the error around the entire teardown process, similar
to what is done in the qemu driver.
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Cole Robinson <crobinso@redhat.com>
Replace tpm->type and tpm->model qemuCaps validation with the
similar logic in domcaps.
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Cole Robinson <crobinso@redhat.com>
Don't restrict this to domcaps testing only, we will soon
need it for qemu command line validation
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Cole Robinson <crobinso@redhat.com>
The qemu `tpm-tis` device is an ISA device, so only really applicable
to x86 archs. For all non-x86 archs we should use `tpm-tis-device`
This fixes tpm-tis usage on armv7l and riscv
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Cole Robinson <crobinso@redhat.com>
Checking against qemu capabilities should be enough here
Resolves: https://gitlab.com/libvirt/libvirt/-/issues/329
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Cole Robinson <crobinso@redhat.com>
When firewalld is restarted or has its rules reloaded, we trigger a
reload of the nwfilter driver. This is done directly in the main
event loop thread which is a bad idea.
In a previous commit we fixed a actual deadlock problem with the
virStateReload API, when triggered from SIGHUP:
commit 33c6eb9689
Author: Jim Fehlig <jfehlig@suse.com>
Date: Thu Mar 8 15:04:48 2018 -0700
libvirtd: fix potential deadlock when reloading
The same deadlock problem previously existed with the firewalld reload
trigger, however, today it is not quite so series. The QEMU driver uses
a private event thread for each VM, so the particular deadlock would
not occur. None the less during the time the filters are reloading all
use of the event loop is blocked, which prevents APIs being serviced.
Reviewed-by: Erik Skultety <eskultet@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
While you can chain the virsh output up to a later 'xmllint' or 'xpath'
command, integrating it into virsh avoids needs for installing extra
binaries which we've often found to be missing on production installs
of libvirt. It also gives better response if the initial virsh command
hits an error, as you don't get an aborted pipeline.
$ virsh pool-dumpxml --xpath //permissions default
<permissions>
<mode>0711</mode>
<owner>1000</owner>
<group>1000</group>
<label>unconfined_u:object_r:svirt_home_t:s0</label>
</permissions>
If multiple nodes match, they are emitted individually:
$ virsh dumpxml --xpath '//devices/*/address[@type="pci"]' --wrap demo
<address type="pci" domain="0x0000" bus="0x05" slot="0x00" function="0x0"/>
<address type="pci" domain="0x0000" bus="0x03" slot="0x00" function="0x0"/>
...snip...
<address type="pci" domain="0x0000" bus="0x00" slot="0x02" function="0x0" multifunction="on"/>
<address type="pci" domain="0x0000" bus="0x07" slot="0x00" function="0x0"/>
but if intending to post-process the output further, the results
can be wrapped in a parent node
$ virsh dumpxml --xpath '//devices/*/address[@type="pci"]' --wrap demo
<nodes>
<address type="pci" domain="0x0000" bus="0x05" slot="0x00" function="0x0"/>
<address type="pci" domain="0x0000" bus="0x03" slot="0x00" function="0x0"/>
...snip...
<address type="pci" domain="0x0000" bus="0x00" slot="0x02" function="0x0" multifunction="on"/>
<address type="pci" domain="0x0000" bus="0x07" slot="0x00" function="0x0"/>
</nodes>
Fixes https://gitlab.com/libvirt/libvirt/-/issues/244
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
The trivial case of fully printing an XML document is boring, but
this helper does more by allowing an XPath expression to be given.
It will then print just the subset of nodes which match the
expression. It either print each match as a standalone XML doc
or can put them into one new XML doc wrapped woith <nodes>...</nodes>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Internally we already collect x86 host family + model + stepping
numeric values. This exposed them in capabilities CPU output.
Example:
$ sudo virsh capabilities | grep -A1 -B1 signature
<microcode version='240'/>
<signature family='6' model='94' stepping='3'/>
<counter name='tsc' frequency='3408010000' scaling='no'/>
Users need to know these values to calculate an expected.
SEV-ES/SEV-SNP launch measurement.
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
Signed-off-by: Cole Robinson <crobinso@redhat.com>
We explicitly check whether the value is YES or NO, which makes
it unnecessary to make sure it's not ABSENT beforehand.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Even when the os.loader element is absent, we still have to
validate that the user is not attempting to use firmware
autoselection with a driver that doesn't implement the feature.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
The feature was implemented in commits b4e34d1083 and
9bb6e4e739 but the corresponding feature flag was not set in
the driver, so other parts of of libvirt wouldn't be able to
know about it.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Add an element to configure the thread pool size:
...
<binary>
<thread_pool size='16'/>
</binary>
...
https://bugzilla.redhat.com/show_bug.cgi?id=2072905
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Update the default "driver" value for hostdev interface since
the default is not "KVM" anymore (refer to "Host device
asssignment" part and by test results). And update the mac
address in one xml example.
Signed-off-by: Yalan Zhang <yalzhang@redhat.com>
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
