Seeing a log message saying 'flags=93' is ambiguous & confusing unless
you happen to know that libvirt always prints flags as hex. Change our
debug messages so that they always add a '0x' prefix when printing flags,
and '0' prefix when printing mode. A few other misc places gain a '0x'
prefix in error messages too.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Similar to domainSaveImageDefineXML this commit adds domainManagedSaveDefineXML
API which allows to edit domain's managed save state xml configuration.
Signed-off-by: Kothapally Madhu Pavan <kmp@linux.vnet.ibm.com>
Similar to domainSaveImageGetXMLDesc this commit adds domainManagedSaveGetXMLDesc
API which allows to get the xml of managed save state domain.
Signed-off-by: Kothapally Madhu Pavan <kmp@linux.vnet.ibm.com>
The API docs for the various vir$OBJECTGetConnect functions
contain a warning
WARNING: When writing libvirt bindings in other languages, do
not use this function. Instead, store the connection and
the domain object together.
There is no reason why language bindings should not use this
method, and indeed the Perl, Python, and Go bindings all use
these methods.
This warning was originally added back in
commit 3edb4bc9fb
Author: Daniel Veillard <veillard@redhat.com>
Date: Tue Jul 24 15:32:55 2007 +0000
* libvirt.spec.in NEWS docs/* po/*: preparing release 0.3.1
* src/libvirt.c python/generator.py: some cleanup and warnings
from Richard W.M. Jones
IIUC, the rational was that these APIs do not need to be
directly exposed to the non-C language, as the language
can expose the same concept itself by storing the original
virConnectPtr object alongside the virDomainPtr. There's
no reason to mandate such an approach though - it is valid
for languages to expose this directly if that suits their
needs better.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
It's obvious that unsigned long long is 64 bit and also our web page
generator would misplace the comment after the return value due to the
way it's parsing them.
Use ATTRIBUTE_FALLTHROUGH, introduced by commit
5d84f5961b, instead of comments to
indicate that the fall through is an intentional behavior.
Signed-off-by: Marc Hartmayer <mhartmay@linux.vnet.ibm.com>
Reviewed-by: Boris Fiuczynski <fiuczy@linux.vnet.ibm.com>
Reviewed-by: Bjoern Walk <bwalk@linux.vnet.ibm.com>
Allow starting the block-copy job for a persistent domain if a user
declares by using a flag that the job will not be recovered if the VM is
switched off while the job is active.
This allows to use the block-copy job with persistent VMs under the same
conditions as would apply to transient domains.
qemu requires that the topology equals to the maximum vcpu count.
Document this along with the API to set maximum vcpu count and the XML
element.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1426220
Management tools may want to check whether the threshold is still set if
they missed an event. Add the data to the bulk stats API where they can
also query the current backing size at the same time.
Similarly to domainSetGuestVcpus this commit adds API which allows to
modify state of individual vcpus rather than just setting the count.
This allows to enable CPUs in specific guest NUMA nodes to achieve any
necessary configuration.
This patch adds support and documentation for
a generalized hardware cache event called cache_l1d
perf event.
Signed-off-by: Nitesh Konkar <nitkon12@linux.vnet.ibm.com>
The virDomainSendProcessSignal method says the flags values
come from virDomainProcessSignalFlag, but this enum has
never existed. No flags are needed for this method.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
With current perf framework, this patch adds support and documentation
for the branch_instructions perf event.
Signed-off-by: Nitesh Konkar <nitkon12@linux.vnet.ibm.com>
Adjust the spacing a bit in order to generate 'cleaner' looking output.
This matches what virDomainMemoryStats does and it creates text/code boxes
in order to list each of the stats for each category.
Only the latest APIs are fully documented and the documentation of the
older variants (which are just limited versions of the new APIs anyway)
points to the newest APIs.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
https://bugzilla.redhat.com/show_bug.cgi?id=1322717
During offline migration, no storage is copied. Nor disks, nor
NVRAM file, nor anything. We use qemu for that and because domain
is not running there's nobody to copy that for us.
We should document this to avoid confusing users.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
https://bugzilla.redhat.com/show_bug.cgi?id=1372613
Apparently, some management applications use the following code
pattern when waiting for a block job to finish:
while (1) {
virDomainGetBlockJobInfo(dom, disk, info, flags);
if (info.cur == info.end)
break;
sleep(1);
}
Problem with this approach is in its corner cases. In case of
QEMU, libvirt merely pass what has been reported on the monitor.
However, if the block job hasn't started yet, qemu reports cur ==
end == 0 which tricks mgmt apps into thinking job is complete.
The solution is to mangle cur/end values as described here [1].
1: https://www.redhat.com/archives/libvir-list/2016-September/msg00017.html
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
With current perf framework, this patch adds support and documentation
for more perf events, including cache misses, cache references, cpu cycles,
and instructions.
Signed-off-by: Qiaowei Ren <qiaowei.ren@intel.com>
QEMU reports timestamp along with other memory statistics, but this information is not saved into domain statistics.
It could be useful to determine if the data reported is fresh or not.
Balloon statistics are not reported in hrf, so no modifications are made in qemu_monitor_text.c.
Signed-off-by: Derbyshev Dmitry <dderbyshev@virtuozzo.com>
'memtotal' in virtio drivers and qemu corresponds to 'available' in libvirt.
Because of that, 'stat-available-memory' is renamed into 'usable'.
Balloon statistics are not reported in hrf, so no modifications are made in qemu_monitor_text.c.
Signed-off-by: Derbyshev Dmitry <dderbyshev@virtuozzo.com>
It may cause unwanted behaviour (of course, is there any wanted one for
that case?) so we should rather disable the possibility of doing so.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1320893
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
To allow finer-grained control of vcpu state using guest agent this API
can be used to individually set the state of the vCPU.
This will allow to better control NUMA enabled guests and/or test
various vCPU configurations.
Add a rather universal API implemented via typed params that will allow
to query the guest agent for the state and possibly other aspects of
guest vcpus.
Some Intel processor families (e.g. the Intel Xeon processor E5 v3
family) introduced some RDT (Resource Director Technology) features
to monitor or control shared resource. Among these features, MBM
(Memory Bandwidth Monitoring), which is build on the CMT (Cache
Monitoring Technology) infrastructure, provides OS/VMM a way to
monitor bandwidth from one level of cache to another.
With current perf framework, this patch adds support to perf event
for MBM.
Signed-off-by: Qiaowei Ren <qiaowei.ren@intel.com>
These API already support VIR_DOMAIN_AFFECT_* flags. But the
documentation does not mention it. Eww.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
I've noticed that these APIs are missing @flags argument. Even
though we don't have a use for them, it's our policy that every
new API must have @flags.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
API agreed on in
https://www.redhat.com/archives/libvir-list/2015-October/msg00872.html
* include/libvirt/libvirt-domain.h (virDomainGetPerfEvents,
virDomainSetPerfEvents): New declarations.
* src/libvirt_public.syms: Export new symbols.
* src/driver-hypervisor.h (virDrvDomainGetPerfEvents,
virDrvDomainSetPerfEvents): New typedefs.
* src/libvirt-domain.c: Implement virDomainGetPerfEvents and
virDomainSetPerfEvents.
Signed-off-by: Qiaowei Ren <qiaowei.ren@intel.com>
Message-id: 1459171833-26416-2-git-send-email-qiaowei.ren@intel.com
To use post-copy one has to start the migration with
VIR_MIGRATE_POSTCOPY flag and, while migration is in progress, call
virDomainMigrateStartPostCopy() to switch from pre-copy to post-copy.
Signed-off-by: Cristian Klein <cristiklein@gmail.com>
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
The VIR_DOMAIN_EVENT_ID_JOB_COMPLETED event will be triggered once a job
(such as migration) finishes and it will contain statistics for the job
as one would get by calling virDomainGetJobStats. Thanks to this event
it is now possible to get statistics of a completed migration of a
transient domain on the source host.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
We have a policy that if API may end up talking to a guest agent
it should require RW connection. We don't obey the rule in
virDomainGetTime().
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
This API does not change domain state. However, we have a policy
that an API talking to a guest agent requires RW access. But that
happens only if source == VIR_DOMAIN_INTERFACE_ADDRESSES_SRC_AGENT.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
This function may be called with @dconnuri == NULL, e.g. from
virDomainMigrateToURI3() if the flags are missing
VIR_MIGRATE_PEER2PEER flag. Moreover, all later functions called
from here do wrap it into NULLSTR() so why not do the same here?
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
We have few code samples there that are almost unreadable when formatted
because they are not indented properly. By indenting them they are
formatted as code and hence quite readable. Also adjust descriptions to
be comments and add semicolons so that the code sample looks like sample
of a working code.
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
virDomainSetMemory is documented to change only runtime configuration of
running domain. However, that's not true of all hypervisors supported.
Seems as though when commit id '0f2e50be5' added the current flag, the
function description should have been updated similar to when commit id
'c1795c52' updated the virDomainSetMaxMemory description. Especially since
commit id '80427f1d' updated the virsh 'setmem' description to indicate
"behavior is different depending on hypervisor."
This patch will update the description to match current functionality.
Signed-off-by: Nikolay Shirokovskiy <nshirokovskiy@virtuozzo.com>
After commit a26669d7, we only jump to error when
virDomainMigrateUnmanagedParams return a value less than -1.
this will make the migrate result always be success even we
meet some problem.
Signed-off-by: Luyao Huang <lhuang@redhat.com>
Our apibuild.py script does not cope with ATTRIBUTE_NONNULL:
Parse Error: parsing function type, ')' expected
Got token ('name', 'char')
Last token: ('name', 'char')
Token queue: [('op', '*'), ('name', 'dconnuri'), ('sep', ')')]
Line 3297 end:
Makefile:2441: recipe for target '../../docs/apibuild.py.stamp' failed
Let's drop it. Moreover, up until e17ae3ccc2 where it was
introduced we did not really care about NULL-ity of dconnuri. And
moreover the ATTRIBUTE_NONNULL merely checks for static calls
over NULL, it won't catch the dynamic ones, where a NULL is
passed by a variable at runtime.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Check dconnuri is not null or we will catch nullpointer later.
I hope this makes Coverity happy.
Signed-off-by: Nikolay Shirokovskiy <nshirokovskiy@virtuozzo.com>
virDomainMigrateUnmanagedParams is not a good candidate for this functionality
as it is used by migrate family functions too and its have its own checks that
are superset of extracted and we don't need to check twice.
Actually name of the function is slightly misleading as there is also a check
for consistensy of flags parameter alone. So it could be refactored further and
reused by all migrate functions but for now let it be a matter of a different
patchset.
It is *not* a pure refactoring patch as it introduces offline check for older
versions. Looks like it must be done that way and no one will be broken too.
Signed-off-by: Nikolay Shirokovskiy <nshirokovskiy@virtuozzo.com>
Finally on this step we get what we were aimed for - toURI{1, 2} (and
migration{*} APIs too) now can work thru V3_PARAMS protocol. Execution path
goes thru unchanged virDomainMigrateUnmanaged adapter function which is called
by all target places.
Note that we keep the fact that direct migration never works
thru V3_PARAMS proto. We can't change this aspect without
further investigation.
Signed-off-by: Nikolay Shirokovskiy <nshirokovskiy@virtuozzo.com>
Move virDomainMigrateUnmanagedProto* expected params list check into
function itself and use common virTypedParamsCheck for this purpose.
Signed-off-by: Nikolay Shirokovskiy <nshirokovskiy@virtuozzo.com>
Extract parameter adaptation and checking which is protocol dependent into
designated functions. Leave only branching and common checks in
virDomainMigrateUnmanagedParams.
Signed-off-by: Nikolay Shirokovskiy <nshirokovskiy@virtuozzo.com>
Let's put main functionality into params version of virDomainMigrateUnmanaged
as a preparation step for merging it with virDomainMigratePeer2PeerParams.
virDomainMigrateUnmanaged then does nothing more then just adapting arguments.
Signed-off-by: Nikolay Shirokovskiy <nshirokovskiy@virtuozzo.com>
p2p plain and direct function are good candidates for code reuse. Their main
function is same - to branch among different versions of migration protocol and
implementation of this function is also same. Also they have other common
functionality in lesser aspects. So let's merge them.
But as they have different signatures we have to get to convention on how to
pass direct migration 'uri' in 'dconnuri' and 'miguri'. Fortunately we alreay
have such convention in parameters passed to toURI2 function, just let's follow
it. 'uri' is passed in miguri and dconnuri is ignored.
Signed-off-by: Nikolay Shirokovskiy <nshirokovskiy@virtuozzo.com>
We use miguri name for this parameter in other places. So
make naming more consitent.
Signed-off-by: Nikolay Shirokovskiy <nshirokovskiy@virtuozzo.com>
Direct migration should work if *perform3 is present but *perform
is not. This is situation when driver migration is implemented
after new version of driver function is introduced. We should not
be forced to support old version too as its parameter space is
subspace of newer one.
This is more structured code so it will be easier to add branch for _PARAMS
protocol here. It is not a pure refactoring strictly speaking as we remove
scenarios for broken cases when driver defines V3 feature and implements
perform function. So it is additionally a more solid code.
Signed-off-by: Nikolay Shirokovskiy <nshirokovskiy@virtuozzo.com>
'useParams' parameter usage is an example of control coupling. Most of the work
inside the function is done differently except for the uri check. Lets split
this function into two, one with extensible parameters set and one with hardcoded
parameter set.
Signed-off-by: Nikolay Shirokovskiy <nshirokovskiy@virtuozzo.com>
Commit id '2e7cea243' added a check for an error from Finish instead
of 'unexpected error'; however, if for some reason there wasn't an
error, then virGetLastError could return NULL resulting in the
NULL pointer deref to err->domain.
The comment for the function indicated that iothread_id had to be
a positive non-zero value; however, that wasn't checked - that is
a value of 0 is/was allowed by the API and was left up to the
hypervisor to reject the value.
More than likely this nuance was missed during the many "adjustments"
to the API in the review phase.
Allow 0 as an iothread_id and force the hypervisor to handle.
The qemuDomainPinIOThread API will look up the iothread_id of
0 and not find it and message that anyway.
Also, among with this new API new ACL that restricts rename
capability is invented too.
Signed-off-by: Tomas Meszaros <exo@tty.sk>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
So the API takes @dumpformat argument. This is what makes it special
when compared to virDomainCoreDump. The argument is there so that
users can choose the format of resulting core dump file. And to ease
them the choosing process we even have an enum with supported values
across all the hypervisors. But we don't mention the enum in the
function description anywhere. Fix it!
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
When QEMU exits on destination during migration, the source reports
either success (if the failure happened at the very end) or unhelpful
"unexpectedly failed" error message. However, the Finish API called on
the destination may report a real error so let's use it instead of the
generic one.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
While we probably won't see machines with more than 65536 cpus for a
while lets store the cpu count as an integer so that we can avoid quite
a lot of overflow checks in our code.
There are also a couple that were very uninformatively just logging
the value of the pointer rather than the string itself:
* the "name" arg to virNodeDeviceLookupByName()
* wwnn and wwpn args to virNodeDeviceLookupSCSIHostByWWN()
All char*'s that make sense should now have their contents logged
rather than the pointer, and all %s args should now be inside
NULLSTR().
For setting passwords of users inside the domain.
With the VIR_DOMAIN_PASSWORD_ENCRYPTED flag set, the password
is assumed to be already encrypted by the method required
by the guest OS.
https://bugzilla.redhat.com/show_bug.cgi?id=1174177
The APIs take the memory value in KiB and we store it in KiB
internally, but we cannot parse the whole ULONG_MAX range
on 64-bit systems, because virDomainParseScaledValue
needs to fit the value in bytes in an unsigned long long.
https://bugzilla.redhat.com/show_bug.cgi?id=1176739
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>
The error output of snapshot-revert should be more friendly.
There is no need to show virDomainRevertToSnapshot to user.
virReportError already includes __FUNCTION__ information in a
separate member of the struct, so repeating it in the message is
redundant and leads to situations where higher level code ends up
reporting the lower level name. We correctly converted the error
output making it more succinct and user-friendly.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1086726
Dependant is flagged as wrong in US dictionary (only valid in UK
dictionary, and even then, it has only the financial sense and not the
inter-relatedness sense that we are more prone to be wanting throughout
code).
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
