In a number of places in the bhyve driver, virObjectUnlock()
is called with an arg without check if the arg is non-NULL, which
could result in passing NULL value and a warning like:

virObjectUnlock:340 : Object 0x0 ((unknown)) is not a virObjectLockable instance

* src/bhyve/bhyve_driver.c (bhyveDomainGetInfo)
(bhyveDomainGetState, bhyveDomainGetAutostart)
(bhyveDomainSetAutostart, bhyveDomainIsActive)
(bhyveDomainIsPersistent, bhyveDomainGetXMLDesc)
(bhyveDomainUndefine, bhyveDomainLookupByUUID)
(bhyveDomainLookupByName, bhyveDomainLookupByID)
(bhyveDomainCreateWithFlags, bhyveDomainOpenConsole):
Check if arg is not NULL before calling virObjectUnlock on it.

Support events for these functions:

 - domainDefineXML
 - domainUndefine
 - domainCreate{WithFlags,XML}
 - domainDestroy

Add a helper function virBhyveGetDomainTotalCpuStats() to
obtain process CPU time using kvm (kernel memory interface)
and use it to set cpuTime field of the virDomainInfo struct in
bhyveDomainGetInfo().

The only accepted format for now is 'bhyve-argv' which
prints out a bhyve command corresponding to the given
domain definition.

- do not lose new definition for an active domain
- do not leak oldDef
- do not set dom->id if virDomainSaveConfig() fails
- do not call virObjectUnlock(vm) if vm is NULL

Implement bhyveDomainCreateXML function.
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>
Signed-off-by: NRoman Bogorodskiy <bogorodskiy@gmail.com>

When domain is not persistent, it should be forgotten upon destroying.

Implement domainSetMetadata and domainGetMetadata driver calls.

Fix incorrect ATTRIBUTE_NONNULL usage introduced in 17b17565
which caused build failure:

bhyve/bhyve_driver.c:127:48: error: expected ')'
bhyveDriverGetCapabilities(bhyveConnPtr driver ATTRIBUTE_NONNULL)
                                               ^
bhyve/bhyve_driver.c:127:27: note: to match this '('
bhyveDriverGetCapabilities(bhyveConnPtr driver ATTRIBUTE_NONNULL)

Pushed under the build breaker rule.

At the beginning of the function we gain a reference to the driver
capabilities. Then, we call format function (*) which if failed, unref
over caps is called. Then, at the end another unref occurs.

* - Moreover, the format was not called over gained caps, but over
privconn->caps directly which is not allowed anymore.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

The driver passed as the only argument to the function should never be
NULL so there's no need to check it. After removing it, the whole
function collapses to a single line doing ref over driver
capabilities.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

Implement support for connectCompareCPU.

- Move all capabilities functions to separate file
- Add initCPU

Implement bhyveConnectBaselineCPU to support OpenStack/Nova

nmdm is a FreeBSD driver which allows to create a pair of tty
devices one of which is passed to the guest and second is used
by the client.

This patch adds new 'nmdm' character device type. Its definition
looks this way:

<serial type='nmdm'>
  <source master='/dev/nmdm0A' slave='/dev/nmdm0B'/>
</serial>

Master is passed to the hypervisior and slave is used for client
connection.

Also implement domainOpenConsole() for bhyve driver based on that.

Signed-off-by: NRoman Bogorodskiy <bogorodskiy@gmail.com>

Implement domain lookup by its ID.

The only supported flag for now is 'autodestroy'. In order to
support 'autodestroy', add support for close callbacks.

Signed-off-by: NMartin Kletzander <mkletzan@redhat.com>

New functionalities:
- connectGetMaxVcpus - on bhyve hardcode this value to 16
- nodeGetFreeMemory - do not use physmem_get on FreeBSD, since
                      it might get wrong value on systems with
                      more than 100GB of RAM
- nodeGetCPUMap - wrapper only for mapping function, currently not
                  supported by FreeBSD
- nodeSet/GetMemoryParameters - wrapper only for future improvements,
                                currently not supported by FreeBSD

Any source file which calls the logging APIs now needs
to have a VIR_LOG_INIT("source.name") declaration at
the start of the file. This provides a static variable
of the virLogSource type.
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>

Add a check that domain is active before attempting to destroy it.

Add bhyveNodeGetInfo() which is a simple wrapper around nodeGetInfo()
from src/nodeinfo.c.

Coverity found an issue in lxc_driver and uml_driver that we don't
check the return value of register functions.

I've also updated all other places and unify the way we check the
return value.
Signed-off-by: NPavel Hrdina <phrdina@redhat.com>

Implement domainUndefine and required helper functions:
 - domainIsActive
 - domainIsPersistent

- Implement nodeGetCPUStats using nodeGetCPUStats()
- Implement nodeGetMemoryStats using nodeGetMemoryStats()

At this point it has a limited functionality and is highly
experimental. Supported domain operations are:

  * define
  * start
  * destroy
  * dumpxml
  * dominfo

It's only possible to have only one disk device and only one
network, which should be of type bridge.