The libvirtd daemon currently ignores the return status of
virDriverLoadModule entirely. This is way too loose, resulting in many
important problems going undiagnosed, resulting in a libvirtd that may
never work correctly. We should only ignore a non-existant module, and
pass back any fatal errors.
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Currently the driver module loading code does not report an error if the
driver module is physically missing on disk. This is useful for distro
packaging optional pieces. When the daemons are split up into one daemon
per driver, we will expect module loading to always succeed. If a driver
is not desired, the entire daemon should not be installed.
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
The driver module loading code is one of the few places that still uses
VIR_ERROR for reporting failures. Convert it to normal error reporting
APIs.
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Currently we do a access(R_OK) check to see whether a loadable module
exists, treating failure as non-fatal. This is unreasonably loose, as a
module which exists but has had incorrect permissions set will turn into
a silent skip. We only want to skip loading if the module genuinely does
not exist on disk, due to the optional package not being installed.
Furthermore, checking the return value of virDriverLoadModuleFile() is
not a suitable witness that the module does not exist. This method can
return NULL if dlopen() fails, for example due to being unable to
resolve symbols in the library. This is should always be reported as an
error because it is a sign of the bad installation where either the
module build doesn't match the libvirtd build, or where some 3rd party
libraries are missing or broken.
Both these problems can be fixed by using virFileExists in the caller
instead.
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
The virFileFindResource method merely builds up the expected fully
qualified path to the resource. It does not actually check if it exists
on disk. The loadable module callers were mistakenly thinking a NULL
indicates the file doesn't exist on disk, whereas it in fact indicates
an out of memory error.
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Now that we've activated two hacks to prevent unloading of modules,
there is no point passing back a pointer to the loaded library handle.
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
We previously added "-z nodelete" to the build of libvirt.so to prevent
crashes when thread local destructors run which point to a code that
has been dlclose()d:
commit 8e44e5593e
Author: Daniel P. Berrange <berrange@redhat.com>
Date: Thu Sep 1 17:57:06 2011 +0100
Prevent crash from dlclose() of libvirt.so
The libvirtd loadable modules can suffer from the same problem if they
were ever unloaded. Fortunately we don't ever call dlclose() on them,
but lets add a second layer of protection by linking them with the
"-z nodelete" flag. While we're doing this, lets add a third layer of
protection by passing RTLD_NODELETE to dlopen().
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
The Xen driver was recently deleted, but libvirtd has left over code
that tries to use it. Fortunately this is dead code because WITH_XEN
will never be defined anymore.
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
We previously added "-z nodelete" to the build of libvirt.so to prevent
crashes when thread local destructors run which point to a code that
has been dlclose()d:
commit 8e44e5593e
Author: Daniel P. Berrange <berrange@redhat.com>
Date: Thu Sep 1 17:57:06 2011 +0100
Prevent crash from dlclose() of libvirt.so
We forgot to copy this protection into the libvirt-qemu.so, libvirt-lxc.so
and libvirt-admin.so libraries when we introduced them.
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Although legal, a few paths were not checking a return value < 0
for failure instead they checked a non zero failure.
Clean them all up to be consistent.
Signed-off-by: John Ferlan <jferlan@redhat.com>
https://bugzilla.redhat.com/show_bug.cgi?id=1569678
On some large systems (with ~400GB of RAM) it is possible for
unsigned int to overflow in which case we report invalid number
of 4K pages pool size. Switch to unsigned long long.
We hit overflow in virNumaGetPages when doing:
huge_page_sum += 1024 * page_size * page_avail;
because although 'huge_page_sum' is an unsigned long long, the
page_size and page_avail are both unsigned int, so the promotion
to unsigned long long doesn't happen until the sum has been
calculated, by which time we've already overflowed.
Turning page_avail into a unsigned long long is not strictly
needed until we need ability to represent more than 2^32
4k pages, which equates to 16 TB of RAM. That's not
outside the realm of possibility, so makes sense that we
change it to unsigned long long to avoid future problems.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
If another event in background while running libvirt-guests.sh
completely undefines a guest it will no more be available for proper
reporting of its shutdown.
This appears in the log as:
Failed to determint state of guest: <UUID>. Not tracking it anymore
Shutdown of guest complete
The first message already reports that we are giving up on the guest
(per UUID which is all we have left at that point). To avoid the message
with an empty guest_name in such a case lets check what guest_name
returned and only print a report on valid content.
Signed-off-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Dariusz Gadomski <dariusz.gadomski@canonical.com>
The recent fix to libvirt-guests.sh.in works for what it intended to fix
(variable scope) but failed to adapt the loop in check_guests_shutdown
correctly. Due to that it currently might detect all guests as "Failed to
determine state of guest" by bad var content or just assumes they are shut
down by picking up an empty variable.
This commit fixes loop to use the passed value and the call in the loop
to actually use the variable assigned in the iterated.
Fixes: 7e476356 "tools: fix variable scope in in check_guests_shutdown"
Fixes: https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/1764668
Reviewed-by: Dariusz Gadomski <dariusz.gadomski@canonical.com>
Signed-off-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Andrea Bolognani <abologna@redhat.com>
Even though we just introduced the rom.enabled attribute to
properly cover the use case, there might be guests out there
that use the only previously available way of disabling PCI
ROM loading by not opting in to schema validation.
To make sure such guests will keep working going forward,
introduce a test case covering the legacy workaround.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
The attribute can be used to disable ROM loading completely
for a device.
This might be needed because, even when the guest is configured
such that the PCI ROM will not be loaded in the PCI BAR, some
hypervisors (eg. QEMU) might still make it available to the
guest in a form (eg. fw_cfg) that some firmwares (eg. SeaBIOS)
will consume, thus not achieving the desired result.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1425058
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
The attribute can be used to disable ROM loading completely
for a device.
This might be needed because, even when the guest is configured
such that the PCI ROM will not be loaded in the PCI BAR, some
hypervisors (eg. QEMU) might still make it available to the
guest in a form (eg. fw_cfg) that some firmwares (eg. SeaBIOS)
will consume, thus not achieving the desired result.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Rework the code such that virDomainObjListFindByID will always
return a locked/ref counted object so that the callers can
always do the same cleanup logic to call virDomainObjEndAPI.
Makes accessing the objects much more consistent.
NB:
There were 2 callers (lxcDomainLookupByID and qemuDomainLookupByID)
that were already using the ByID name, but not virDomainObjEndAPI -
these were changed as well in this update/patch.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Reviewed-by: Jim Fehlig <jfehlig@suse.com>
Now that every caller is using virDomainObjListFindByUUIDRef,
let's just remove it and keep the name as virDomainObjListFindByUUID.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Reviewed-by: Jim Fehlig <jfehlig@suse.com>
The "git-publish" tool is a useful git extension for sending patch
series for code review. It automatically creates versioned tags
each time code on a branch is sent, so that there is a record of
each version. It also remembers the cover letter so it does not
need re-entering each time the series is reposted.
With this config file present it is now sufficient[1] to run
$ git publish
to send all patches in a branch to the list for review
[1] Assuming your $HOME/.gitconfig has an SMTP server listed
at least e.g.
[sendemail]
smtpserver = smtp.example.com
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Many of the old xm and sexpr test files used qemu-dm as the emulator.
Modern Xen systems no longer use the old, forked qemu-dm, instead
preferring the distro provided qemu or an "upstream" qemu that is
built when the Xen tools are built. This qemu is typically installed
in /usr/lib/xen/bin/qemu-system-i386.
The libxl test files already use /usr/lib/xen/bin/qemu-system-i386.
For consistency, change the old test files to use the same emulator
Signed-off-by: Jim Fehlig <jfehlig@suse.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
For vzDomainLookupByID and vzDomainLookupByUUID let's
return a locked and referenced @vm object so that callers
can then use the common and more consistent virDomainObjEndAPI
in order to handle cleanup rather than needing to know that the
returned object is locked and calling virObjectUnlock.
The LookupByName already returns the ref counted and locked object,
so this will make things more consistent.
Also adjust the prlsdkHandle{VmState|VmRemoved|Perf}Event APIs
in the same manner.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Reviewed-by: Nikolay Shirokovskiy <nshirokovskiy@virtuozzo.com>
Rather than have two API's doing different things for different
callers, let's make one API that will always return a locked and
ref counted object. That way, the callers will always know that
they must call virDomainObjEndAPI and not have to decide whether
they should call virObjectUnlock instead.
This will make things consistent with LookupByName which returns
the locked and ref counted object.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Reviewed-by: Nikolay Shirokovskiy <nshirokovskiy@virtuozzo.com>
For vmwareDomObjFromDomainLocked and vmwareDomainLookupByID
let's return a locked and referenced @vm object so that callers
can then use the common and more consistent virDomainObjEndAPI
in order to handle cleanup rather than needing to know that the
returned object is locked and calling virObjectUnlock.
The LookupByName already returns the ref counted and locked object,
so this will make things more consistent.
For vmwareDomainUndefineFlags and vmwareDomainShutdownFlags since
virDomainObjListRemove will return an unlocked object, we need to
relock before making the EndAPI call.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
If vmwareDomainLookupByID or vmwareDomainLookupByName fails
to find a vm, let's be a bit more descriptive by providing
the failing id or name in the error message.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Rather than repeat code throughout, create and use a couple of
accessors in order to lookup by UUID.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
The virDomainObjListFindByName returns a locked and reffed
domain object, all we did was unlock it, leaving an extra
ref. Use the virDomainObjEndAPI to cleanup instead.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
The generated source files for dispatching libvirtd RPC messages contain
translations and are thus listed in POTFILES. This means they are
required in order to build libvirt.pot. Rather than changing the files
that go into libvirt.pot dynamically, just unconditionally build the
remote driver sources so they are always available for building
libvirt.pot. This ensures we don't silently loose translation messages
based on configure args.
This fixes the mingw build which needs to create libvirt.pot but has
libvirtd disabled.
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
When writing the VMX file from the domain XML, write
cpuid.coresPerSocket if there is a specified CPU topology in the guest.
Use the domain XML of esx-in-the-wild-9 in vmx2xml as testcase for
xml2vmxtest.
Signed-off-by: Pino Toscano <ptoscano@redhat.com>
Acked-by: Richard W.M. Jones <rjones@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Convert the cpuid.coresPerSocket key as both number of CPU sockets, and
cores per socket.
Add the VMX file attached to RHBZ#1568148 as testcase esx-in-the-wild-9;
adapt the resulting XML of testcase esx-in-the-wild-8 to the CPU
topology present in that VMX.
https://bugzilla.redhat.com/show_bug.cgi?id=1568148
Signed-off-by: Pino Toscano <ptoscano@redhat.com>
Acked-by: Richard W.M. Jones <rjones@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Signed-off-by: Ján Tomko <jtomko@redhat.com>
For umlDomObjFromDomainLocked and umlDomainLookupByID let's
return a locked and referenced @vm object so that callers
can then use the common and more consistent virDomainObjEndAPI
in order to handle cleanup rather than needing to know that the
returned object is locked and calling virObjectUnlock. This
means for some consumers we need to relock the @dom after a
virDomainObjListRemove, but before calling virDomainObjEndAPI.
The LookupByName already returns the ref counted and locked object,
so this will make things more consistent.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Rather than an empty failed to find, let's provide a bit more
knowledge about what we failed to find by using the name string
or the id value.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Rather than repeat code throughout, create and use a couple of
accessors in order to lookup by UUID. This will also generate
a common error message including the failed uuidstr for lookup
rather than just returning nothing in some instances.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
The virDomainObjListFindByName will return a locked and reffed
object. If we call virDomainObjListRemove that will unlock the
object upon return, thus we need to relock the object before
making the call to virDomainObjEndAPI.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
There's no need to check if @dom exists before trying to
call virDomainObjListRemove since it must exist due to
prior checks.
Additionally, if we do remove the @dom, then set it to NULL
so that the virObjectUnlock isn't referencing something that
is deleted.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Reviewed-by: Marc Hartmayer <mhartmay@linux.vnet.ibm.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
If virJSONValueArraySize(caps) <= 0, then we will still need to
virJSONValueFree(caps) because qemuMonitorSetMigrationCapabilities
won't consume it.
Found by Coverity
Signed-off-by: John Ferlan <jferlan@redhat.com>
If @client hasn't been opened, then don't call virNetServerClientClose
since that'll cause certain failure.
Found by Coverity
Signed-off-by: John Ferlan <jferlan@redhat.com>
If @log is not fopen'd then, going to cleanup and calling fclose
will make for an unhappy callee. So just fail immediately instead
since there's nothing to clean up.
Found by Coverity
Signed-off-by: John Ferlan <jferlan@redhat.com>
Commit id '43f2ccdc' called virDomainDiskSourceDefFormatInternal
rather than formatting the the disk source inline. However, it
did not handle the case where the helper failed. Over time the
helper has been renamed to virDomainDiskSourceFormat. Similar to
other consumers, if virDomainDiskSourceFormat fails, then the
formatting could be off, so it's better to fail than to continue
on with some possibly bad data. Alter the function and the caller
to check status and jump to error in that case.
Found by Coverity
Signed-off-by: John Ferlan <jferlan@redhat.com>
The code is generic enough to be reused. Move it into a
separate function.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
So far all the properties we are trying to fetch are device
properties, i.e. -device $dev on qemu command line. Change
misleading variable names to express what's queried for better.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
The current private XML parsing code relies on the assumption
that NUMA node IDs start from 0 and are densely allocated,
neither of which is necessarily the case.
Change it so that the bitmap size is dynamically calculated by
looking at NUMA node IDs instead, which ensures all nodes will
be able to fit and thus the bitmap will be parsed successfully.
Update one of the test cases so that it would fail with the
previous approach, but passes with the new one.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1490158
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
vircapstest has code to add a full host NUMA topology, that
is, one that includes all information about nodes and CPUs
including IDs; testQemuCapsInit(), which is used to create a
mock virCapsPtr for QEMU tests, however, just fakes it by
setting nnumaCell_max to some number.
While the latter approach has served us well so far, we're
going to need all the information to be filled in soon. In
order to do that, we can just move the existing code from
vircapstest to testutils and, with some renaming and
trivial tweaking, use it as-is.
Interestingly, the NUMA topology generated by the function
is rigged up so that the NUMA nodes aren't (necessarily)
numbered starting from 0, which is a nice way to spot
mistaken assumptions in our codebase.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Allocated in qemuMigrationParamsNew() we need to free
priv->job.migParams when no longer needed.
==8061== 234 (192 direct, 42 indirect) bytes in 1 blocks are definitely lost in loss record 112 of 123
==8061== at 0x4C2CF26: calloc (vg_replace_malloc.c:711)
==8061== by 0x5325D05: virAlloc (viralloc.c:144)
==8061== by 0x1984F9: qemuMigrationParamsNew (qemu_migration_params.c:218)
==8061== by 0x19A352: qemuMigrationParamsParse (qemu_migration_params.c:1185)
==8061== by 0x1604D8: qemuDomainObjPrivateXMLParseJob (qemu_domain.c:2390)
==8061== by 0x160AE9: qemuDomainObjPrivateXMLParse (qemu_domain.c:2517)
==8061== by 0x5419EAE: virDomainObjParseXML (domain_conf.c:20442)
==8061== by 0x541A25E: virDomainObjParseNode (domain_conf.c:20555)
==8061== by 0x541A2FC: virDomainObjParseFile (domain_conf.c:20574)
==8061== by 0x13607D: testCompareStatusXMLToXMLFiles (qemuxml2xmltest.c:75)
==8061== by 0x14F3E8: virTestRun (testutils.c:180)
==8061== by 0x14DCD0: mymain (qemuxml2xmltest.c:1200)
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
The .pot, .po and .gmo files are slightly unusual in that we generate
them in the srcdir when building form git. This is because they'll be
bundled in the tar archive, so a build-from-tar will see them in srcdir.
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
