Just as it is possible to delete a bridge device with the netlink
RTM_DELLINK message, one can be created with the RTM_NEWLINK
message. Because of differences in the format of the message, it's not
as straightforward as with virNetlinkDelLink() to create a single
utility function that can be used to create any type of interface, so
the new netlink version of virNetDevBridgeCreate() does its own
construction of the netlink message and calls virNetlinkCommand()
itself.
This doesn't provide any extra functionality, just provides symmetry
with the previous commit.
NB: We *could* alter the API of virNetDevBridgeCreate() to take a MAC
address, and directly program that mac address into the bridge (by
adding an IFLA_ADDRESS attribute, as is done in
virNetDevMacVLanCreate()) rather than separately creating the "dummy
tap" (e.g. virbr0-nic) to maintain a fixed mac address on the bridge,
but the commit history of virnetdevbridge.c shows that the presence of
this dummy tap is essential in some older versions of the kernel
(between 2.6.39 and 3.1 or 3.2, possibly?) to proper operation of IPv6
DAD, and I don't want to take the chance of breaking something that I
don't have the time/setup to test (my RHEL6 box is at kernel
2.6.32-544, and the next lowest kernel I have is 3.17)
https://bugzilla.redhat.com/show_bug.cgi?id=1125755
reported that a stray bridge device was left on the system when a
libvirt network failed to start due to an illegal iptables rule caused
by bad config. Apparently the reason this was happening was that
NetworkManager was noticing immediately when the bridge device was
created and automatically setting it IFF_UP. libvirt would then try to
setup the iptables rules, get an error back, and since libvirt had
never IFF_UPed the bridge, it didn't expect that it needed to set it
~IFF_UP before deleting it during the cleanup process. But the
ioctl(SIOCBRDELBR) ioctl will fail to delete a bridge if it is IFF_UP.
Since that bug was reported, NetworkManager has gotten a bit more
polite in this respect, but just in case something similar happens in
the future, this patch switches to using the netlink RTM_DELLINK
message to delete the bridge - unlike SIOCBRDELBR, it will delete the
requested bridge no matter what the setting of IFF_UP.
These two functions are identical, so no sense in having the
duplication. I resisted the temptation to replace calls to
virNetDevMacVLanDelete() with calls to virNetlinkDelLink() just in
case some mythical future platform has macvtap devices that aren't
managed with netlink (or in case we some day need to do more than just
tell the kernel to delete the device).
libvirt has always used the netlink RTM_DELLINK message to delete
macvtap/macvlan devices, but it can actually be used to delete other
types of network devices, such as bonds and bridges. This patch makes
virNetDevMacVLanDelete() available as a generic function so it can
intelligibly be called to delete these other types of interfaces.
Usual update to latest gnulib status. In particular this update
fixes at least one issue that can be seen in libvirt, by silencing
a valgrind detection of uninitialized memory:
https://bugzilla.redhat.com/show_bug.cgi?id=1174147
* .gnulib: Update to latest.
* bootstrap: Resync to gnulib.
Signed-off-by: Eric Blake <eblake@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>
QEMU 2.3 adds these new models to cover Haswell and Broadwell CPUs with
updated microcode. Luckily, they also reverted former the machine type
specific changes to existing models. And since these changes were never
released, we don't need to hack around them in libvirt.
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.
In some circumstances where the build tree differs from the source,
libvirt's compile will try to create the symlink for cpu_map.xml before
creating the directory $(abs_builddir)/cpu:
'src/cpu/cpu_map.xml': No such file or directory'
Do not create the symlink, it is no longer needed after
commit e562e82f
Load CPU map from builddir when run uninstalled
Signed-off-by: Amy Fong <amy.fong@windriver.com>
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Recently we've fixed a bug where the status XML could not be parsed as
the parser used absolute path XPath queries. This test enhancement tests
all XML files used in the qemu-xml-2-xml test as a part of a status XML
snippet to see whether they are parsed correctly. The status XML-2-XML is
currently tested in 223 cases with this patch.
The current auto-indentation buffer code applies indentation only on
complete strings. To allow adding a string containing newlines and
having it properly indented this patch adds virBufferAddStr.
When using QEMU's 9pfs the target "dir" element is not necessarily an
absolute path but merely an arbitrary identifier. So validation in that
case currently fails with the misleading
$ virt-xml-validate /tmp/test.xml
Relax-NG validity error : Extra element devices in interleave
/tmp/test.xml:24: element devices: Relax-NG validity error : Element domain failed to validate content
/tmp/test.xml fails to validate
While this thread is cleaning up the client and connection objects:
#2 virFileReadAll (path=0x7f28780012b0 "/proc/1319/stat", maxlen=maxlen@entry=1024, buf=buf@entry=0x7f289c60fc40) at util/virfile.c:1287
#3 0x00007f28adbb1539 in virProcessGetStartTime (pid=<optimized out>, timestamp=timestamp@entry=0x7f289c60fc98) at util/virprocess.c:838
#4 0x00007f28adb91981 in virIdentityGetSystem () at util/viridentity.c:151
#5 0x00007f28ae73f17c in remoteClientFreeFunc (data=<optimized out>) at remote.c:1131
#6 0x00007f28adcb7f33 in virNetServerClientDispose (obj=0x7f28aecad180) at rpc/virnetserverclient.c:858
#7 0x00007f28adba8eeb in virObjectUnref (anyobj=<optimized out>) at util/virobject.c:265
#8 0x00007f28ae74ad05 in virNetServerHandleJob (jobOpaque=<optimized out>, opaque=0x7f28aec93ff0) at rpc/virnetserver.c:205
#9 0x00007f28adbbef4e in virThreadPoolWorker (opaque=opaque@entry=0x7f28aec88030) at util/virthreadpool.c:145
In stack frame #6 the client->identity object got unref'd, but the code
that removes the event callbacks in frame #5 did not run yet as we are
trying to obtain the system identity (frames #4, #3, #2).
In other thead:
#0 virObjectUnref (anyobj=anyobj@entry=0x7f288c162c60) at util/virobject.c:264
klass = 0xdeadbeef
obj = 0x7f288c162c60
#1 0x00007f28ae71c709 in remoteRelayDomainEventCheckACL (client=<optimized out>, conn=<optimized out>, dom=dom@entry=0x7f28aecaafc0) at remote.c:164
#2 0x00007f28ae71fc83 in remoteRelayDomainEventTrayChange (conn=<optimized out>, dom=0x7f28aecaafc0, ... ) at remote.c:717
#3 0x00007f28adc04e53 in virDomainEventDispatchDefaultFunc (conn=0x7f287c0009a0, event=0x7f28aecab1a0, ...) at conf/domain_event.c:1455
#4 0x00007f28adc03831 in virObjectEventStateDispatchCallbacks (callbacks=<optimized out>, ....) at conf/object_event.c:724
#5 virObjectEventStateQueueDispatch (callbacks=0x7f288c083730, queue=0x7fff51f90030, state=0x7f288c18da20) at conf/object_event.c:738
#6 virObjectEventStateFlush (state=0x7f288c18da20) at conf/object_event.c:816
#7 virObjectEventTimer (timer=<optimized out>, opaque=0x7f288c18da20) at conf/object_event.c:562
#8 0x00007f28adb859cd in virEventPollDispatchTimeouts () at util/vireventpoll.c:459
Frame #0 is unrefing an invalid identity object while frame #2 hints
that the client is still dispatching the event.
For untrimmed backtrace see the bugzilla attachment.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1203030
The fake object is used to pass the domain name and UUID to the ACL code
for events where we don't have the full domain def when dispatching
events. The rest of the entries would be left uninitialized. While this
is not a problem code-wise as the used fields are initialized it looks
ugly in the debugger.
Don't unref the old identity unless we set the new one correctly and
unref the new one on failure to set it so that we don't leak any
references or use invalid pointers.
To allow adding more tests, refactor the XML-2-XML test so that the
files are not reloaded always and clarify the control flow.
Result of this changes is that the active and inactive portions of the
XML are tested in separate steps rather than one test step.
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)
Function virQEMUCapsInitGuestFromBinary detect kvm support by testing
whether /dev/kvm exists or whether we pass path to kvmbin. Provide the
path we are testing via kvmbin for testing purpose instead of detecting
presence of /dev/kvm to successfully run the tests on all hosts.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
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>
Commit 95695388 introduced new util/virthreadjob.c/h files but the
makefile has type that breaks rpm build.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
because network address is required by route, so
here we should add one avoid user misunderstand.
Signed-off-by: Chen Fan <chen.fan.fnst@cn.fujitsu.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>
Every thread created as a worker thread within a pool gets a name
according to virThreadPoolJobFunc name.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Automatically assign a job to every thread created by virThreadCreate.
The name of the virThreadFunc function passed to virThreadCreate is used
as the job or worker name in case no name is explicitly passed.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
We want all threads to be set as workers or to have a job assigned to
them, which can easily be achieved in virThreadCreate wrapper to
pthread_create. Let's make sure we always use the wrapper.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Each thread can use a thread local variable to keep the name of a job
which is currently running in the job.
The virThreadJobSetWorker API is supposed to be called once by any
thread which is used as a worker, i.e., it is waiting in a pool, woken
up to do a job, and returned back to the pool.
The virThreadJobSet/virThreadJobClear APIs are to be called at the
beginning/end of each job.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
The virNodeDeviceDettach API only works on PCI devices.
Originally added by commit 10d3272e, but the API never
supported USB devices.
Reported by: Martin Polednik <mpolednik@redhat.com>
Although needed in the Xen 4.1 libxl days, there is no longer any
benefit to having per-domain libxl_ctx. On the contrary, their use
makes the code unecessarily complicated and prone to deadlocks under
load. As suggested by the libxl maintainers, use a single libxl_ctx
as a handle to libxl instead of per-domain ctx's.
One downside to using a single libxl_ctx is there are no longer
per-domain log files for log messages emitted by libxl. Messages
for all domains will be sent to /var/log/libvirt/libxl/libxl-driver.log.
Signed-off-by: Jim Fehlig <jfehlig@suse.com>
libxlDomainFreeMem() is only used in libxl_domain.c and thus should
be declared static. While at it, change the signature to take a
libxl_ctx instead of libxlDomainObjPrivatePtr, since only the
libxl_ctx is needed.
Signed-off-by: Jim Fehlig <jfehlig@suse.com>
This function now only enables domain death events. Simply call
libxl_evenable_domain_death() instead of an unnecessary wrapper.
Signed-off-by: Jim Fehlig <jfehlig@suse.com>
Informing libxl how to handle its child proceses should be done once
during driver initialization, not once for each domain-specific
libxl_ctx object. The related libxl documentation in
$xen-src/tools/libxl/libxl_event.h even mentions that "it is best to
call this at initialisation".
Signed-off-by: Jim Fehlig <jfehlig@suse.com>
Long ago I incorrectly associated libxl fd and timer registrations
with per-domain libxl_ctx objects. When creating a libxlDomainObjPrivate,
a libxl_ctx is allocated, and libxl_osevent_register_hooks is called
passing a pointer to the libxlDomainObjPrivate. When an fd or timer
registration occurred, the registration callback received the
libxlDomainObjPrivate, containing the per-domain libxl_ctx. This
libxl_ctx was then used when informing libxl about fd events or
timer expirations.
The problem with this approach is that fd and timer registrations do not
share the same lifespan as libxlDomainObjPrivate, and hence the per-domain
libxl_ctx ojects. The result is races between per-domain libxl_ctx's being
destoryed and events firing on associated fds/timers, typically manifesting
as an assert in libxl
libxl_internal.h:2788: libxl__ctx_unlock: Assertion `!r' failed
There is no need to associate libxlDomainObjPrivate objects with libxl's
desire to use libvirt's event loop. Instead, the driver-wide libxl_ctx can
be used for the fd and timer registrations.
This patch moves the fd and timer handling code away from the
domain-specific code in libxl_domain.c into libxl_driver.c. While at it,
function names were changed a bit to better describe their purpose.
The unnecessary locking was also removed since the code simply provides a
wrapper over the event loop interface. Indeed the locks may have been
causing some deadlocks when repeatedly creating/destroying muliple domains.
There have also been rumors about such deadlocks during parallel OpenStack
Tempest runs.
Signed-off-by: Jim Fehlig <jfehlig@suse.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>
