In the pre-NUMA ages pinning a vCPU to all pCPUs was eaqual to deleting
the pinning info. Now it does not entirely work that way. Pinning a vCPU
to all pCPUs might be a desired operation. Additionally removal of the
pinning will result into using the default pinning information at the
next boot which might be different from all vcpus.

This patch removes the false assumption that we should remove the
pinning after pinning to all vCPUs and tweaks the documentation for
virsh.

A later patch will implement a new flag for the virDomainPinVcpuFlags
API that will allow to remove the pinning in a sane way.

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.

Since the returned structure uses "unsigned long" for memory sizes add a
few overflow checks to notify the user in case we are not able to
represent given values.

When qemu does not support the balloon event the current memory size
needs to be queried. Since there are two places that implement the same
logic, split it out into a function and reuse.

After libvirt issues the balloon resize command, the current balloon
size needs to be changed to the maximum memory size since the vCPUs were
not started and thus the balloon driver could not return the memory.

Since GetXMLDesc and other APIs return the balloon size without updating
it in case they are not able to obtain the job and the memory balloon
does not support the asynchronous event the sizing might be incorrect.

Refactor the function to return the bitmap instead of an integer and the
inner workings so that they make more sense.

This patch also fixes possible segfault on old systems that was
introduced by commit:

commit f1a43a8e
Author: Hu Tao <hutao@cn.fujitsu.com>
Date:   Fri Sep 14 15:46:59 2012 +0800

    use virBitmap to store cpu affinity info

Since the monitor code now supports ullongs when setting balloon size,
drop the legacy code with overflow checking.

Additionally the comment mentioning that the job is treated as a sync
job does not make sense any more since the monitor is entered
asynchronously.

Document the top level function rather than both bottom level ones. It
makes looking the docs up quicker.

Get rid of the unnecessary allocation and copying of the bitmap and
clean up some unnecesary temporary variables.

Reuse the function so that we can get rid of a lot of temporary
allocations.

Store the emulator pinning cpu mask as a pure virBitmap rather than the
virDomainPinDef since it stores only the bitmap and refactor
qemuDomainPinEmulator to do the same operations in a much saner way.

As a side effect virDomainEmulatorPinAdd and virDomainEmulatorPinDel can
be removed since they don't add any value.

In case when <vcpu ... cpuset=""> is not specified, the vcpupin array is
not guaranteed to be allocated to def->vcpus. This would cause a crash
for TCG since it does not report thread IDs for vCPUs.

Commit id '980b265d' neglected to check for a successful status when
deciding whether to release the device address for the RNG attach thus
the address would be released even though the device was added.
Signed-off-by: NLuyao Huang <lhuang@redhat.com>

Commit id '862473fa' neglected to return the status from the
qemuDomainRemoveRNGDevice call in qemuDomainRemoveDevice causing
the function to always fail when receiving an RNG device unplug
event. Additionally the domain status/state would not be updated
in the processDeviceDeletedEvent path.
Signed-off-by: NLuyao Huang <lhuang@redhat.com>

The guest firmware provides the same functionality as the pvpanic
device, and the relevant element should always be present in the
domain XML to reflect this fact, so add it after parsing the
definition if it wasn't there already.

The guest firmware provides the same functionality as the pvpanic
device, which is not available in QEMU on pSeries, so the domain
XML should be allowed to contain the <panic> element.

On the other hand, unlike the pvpanic device, the guest firmware
can't be configured, so report an error if an address has been
provided in the XML.

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1182388

When attempting to hotplug a virtio-serial console to a domain
that had no virtio-serial controllers (not even those that
are added by libvirt when some devices need them) at daemon startup,
report a user-friendly error:

error: Failed to attach device from console.xml
error: internal error: no virtio-serial controllers are available

instead of crashing the daemon:

Process terminating with default action of signal 11 (SIGSEGV): dumping core
 Access not within mapped region at address 0x8
   at 0x531028F: virDomainVirtioSerialAddrNext (domain_addr.c:916)
   by 0x531028F: virDomainVirtioSerialAddrAssign (domain_addr.c:1029)
   by 0x1CBF68: qemuDomainAttachChrDevice (qemu_hotplug.c:1565)
   by 0x1BCD5E: qemuDomainAttachDeviceLive (qemu_driver.c:7997)
   by 0x1BCD5E: qemuDomainAttachDeviceFlags (qemu_driver.c:8743)

Introduced in v1.2.14-30-g59033788.

The QMP command, like the interrupt reinjection logic it's connected
to, is only implemented in QEMU when TARGET_I386 is defined, so
checking for its availability on any other architecture is pointless.

On the other hand, when we're on x86, we shouldn still make sure that
rtc-reset-reinjection is available and refuse to set the time
otherwise.

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1211938

Since commit bcd9a564 virDomainNumatuneGetMode returns the value
via a pointer rather than in the return value. The change triggered
problems with platforms where the compiler decides to use a data type of
size different than integer at the point where we typecast it.

Work around the issue by using an intermediate variable of the correct
type that gets casted back by the default typecasting rules.

Rather than an algorithm based solely on libvirtd ctime to refresh the
capabilities add the element of the libvirt build version into the equation.
Since that version wouldn't be there prior to this code being run - don't
fail on reading the capabilities if not found. In this case, the cache
will always be rebuilt when a new libvirt version is installed.

https://bugzilla.redhat.com/show_bug.cgi?id=1195882

Original commit id 'cbde3589' indicates that the cache file would be
discarded if either the QEMU binary or libvirtd 'ctime' changes; however,
the code only discarded if the QEMU binary time didn't match or if the
new libvirtd ctime was later than what created the cache file.

Since many factors come into play with 'ctime' adjustments (including
perhaps turning back the hands of time), change the logic to also force
a refresh if the ctime of libvirt is different than what's in the cache.

Recent changes to the -M/--machine processing code in qemuParseCommandLine
caused Coverity to determine there was a possible resource leak with how
the 'list' is managed. Rather than try to add virStringFreeList calls
everywhere - just promote list to the top of the variables and free it
within the error processing code. Also required a couple of other tweaks
in order to avoid double free's.

Not every chardev is plugged onto virtio-serial bus. However, the
code introduced in 89e991a2 assumes that. Incorrectly.
With previous patches we have three options where a chardev can
be plugged: virtio-serial, USB and PCI. This commit fixes the
detach part. However, since we are not auto allocating USB
addresses yet, I'm just marking the place where appropriate code
should go.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

Not every chardev is plugged onto virtio-serial bus. However, the
code introduced in 89e991a2 assumes that. Incorrectly.
With previous patches we have three options where a chardev can
be plugged: virtio-serial, USB and PCI. This commit fixes the
attach part.  However, since we are not auto allocating USB
addresses yet, I'm just marking the place where appropriate code
should go.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

https://bugzilla.redhat.com/show_bug.cgi?id=998813

Implementation is pretty straight-forward. Of course, not all qemus
out there supports the device, so new capability is introduced and
checked prior each use of the device.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

Base-64 encode the password and pass it to the guest agent
via the 'guest-set-user-password' command.

https://bugzilla.redhat.com/show_bug.cgi?id=1174177

Most virDomainDiskIndexByName callers do not care about the index; what
they really want is a disk def pointer.
Signed-off-by: NJiri Denemark <jdenemar@redhat.com>

When starting a domain, if a domain specifies security drivers we do not have
loaded, we fail. However we don't check for this during
reconnect, so any operation relying on security driver functionality would fail.
If someone e.g. starts a domain with selinux driver loaded, then they change
the security driver to 'none' in config, restart the daemon and call dump/save/..,
QEMU will return an error.
As we shouldn't kill the domain, we should at least log an error to let the
user know that domain reconnect wasn't completely clean.

https://bugzilla.redhat.com/show_bug.cgi?id=1183893