Testing various configuration schemas targeting postive and negative
nestedhvm under libvirt <cpu mode="host-passthrough"> configuration.

Mode "host-passthrough" generates nestedhvm=1 in/from xl format where

Intel virtualization (VT-x):
<feature policy='disable' name='vmx'/>

    or

AMD virtualization (AMD-V):
<feature policy='disable' name='svm'/>

disables virtualization mode under guest domains.
Signed-off-by: NWim ten Have <wim.ten.have@oracle.com>
Signed-off-by: NJim Fehlig <jfehlig@suse.com>

Per xen-xl conversions from and to native under host-passthrough
mode we take care for Xen (nestedhvm = mode) applied and inherited
settings generating or processing correct feature policy:

[On Intel (VT-x) architectures]
<feature policy='disable' name='vmx'/>

or

[On AMD (AMD-V) architectures]
<feature policy='disable' name='svm'/>

It will then generate (or parse) for nestedhvm=1 in/from xl format.
Signed-off-by: NJoao Martins <joao.m.martins@oracle.com>
Signed-off-by: NWim ten Have <wim.ten.have@oracle.com>

Xen feature nestedhvm is the option on Xen 4.4+ which enables
nested virtualization when mode host-passthrough is applied.

nested HVM is enabled by adding below on the target domain;
<cpu mode='host-passthrough'/>

Virtualization on target domain can be disabled by specifying
such under feature policy rule on target name;

[On Intel (VT-x) architecture]
<feature policy='disable' name='vmx'/>

or:

[On AMD (AMD-V) architecture]
<feature policy='disable' name='svm'/>
Signed-off-by: NJoao Martins <joao.m.martins@oracle.com>
Signed-off-by: NWim ten Have <wim.ten.have@oracle.com>

This patch maps /domain/cpu/cache element into -cpu parameters:

- <cache mode='passthrough'/> is translated to host-cache-info=on
- <cache level='3' mode='emulate'/> is transformed into l3-cache=on
- <cache mode='disable'/> is turned in host-cache-info=off,l3-cache=off

Any other <cache> element is forbidden.

The tricky part is detecting whether QEMU supports the CPU properties.

The 'host-cache-info' property is introduced in v2.4.0-1389-ge265e3e480,
earlier QEMU releases enabled host-cache-info by default and had no way
to disable it. If the property is present, it defaults to 'off' for any
QEMU until at least 2.9.0.

The 'l3-cache' property was introduced later by v2.7.0-200-g14c985cffa.
Earlier versions worked as if l3-cache=off was passed. For any QEMU
until at least 2.9.0 l3-cache is 'off' by default.

QEMU 2.9.0 was the first release which supports probing both properties
by running device-list-properties with typename=host-x86_64-cpu. Older
QEMU releases did not support device-list-properties command for CPU
devices. Thus we can't really rely on probing them and we can just use
query-cpu-model-expansion QMP command as a witness.

Because the cache property probing is only reliable for QEMU >= 2.9.0
when both are already supported for quite a few releases, we let QEMU
report an error if a specific cache mode is explicitly requested. The
other mode (or both if a user requested CPU cache to be disabled) is
explicitly turned off for QEMU >= 2.9.0 to avoid any surprises in case
the QEMU defaults change. Any older QEMU already turns them off so not
doing so explicitly does not make any harm.
Signed-off-by: NJiri Denemark <jdenemar@redhat.com>

This patch introduces

    <cache level='N' mode='emulate'/>
    <cache mode='passthrough'/>
    <cache mode='disable'/>

sub element of /domain/cpu. Currently only a single <cache> element is
allowed.
Signed-off-by: NJiri Denemark <jdenemar@redhat.com>

The type of this parameter is virCPUType so calling it 'mode' is pretty
strange, 'type' is a much better name.
Signed-off-by: NJiri Denemark <jdenemar@redhat.com>

Not all async jobs are visible via virDomainGetJobStats (either they are
too fast or getting the stats is not allowed during the job), but
forcing all of them to advertise the operation is easier than hunting
the jobs for which fetching statistics is allowed. And we won't need to
think about this when we add support for getting stats for more jobs.

https://bugzilla.redhat.com/show_bug.cgi?id=1441563Signed-off-by: NJiri Denemark <jdenemar@redhat.com>

The parameter is reported by virDomainGetJobStats API and
VIR_DOMAIN_EVENT_ID_JOB_COMPLETED event and it can be used to identify
the operation (migration, snapshot, ...) to which the reported
statistics belong.

https://bugzilla.redhat.com/show_bug.cgi?id=1441563Signed-off-by: NJiri Denemark <jdenemar@redhat.com>

As with virtio-scsi, the "internal error" messages after
preparing a vhost-scsi hostdev overwrites more meaningful
error messages deeper in the callchain.  Remove it too.
Signed-off-by: NEric Farman <farman@linux.vnet.ibm.com>

I tried to attach a SCSI LUN to two different guests, and forgot
to specify "shareable" in the hostdev XML.  Attaching the device
to the second guest failed, but the message was not helpful in
telling me what I was doing wrong:

  $ cat scsi_scratch_disk.xml
    <hostdev mode='subsystem' type='scsi'>
      <source>
        <adapter name='scsi_host3'/>
        <address bus='0' target='15' unit='1074151456'/>
      </source>
    </hostdev>

  $ virsh attach-device dasd_sles_d99c scsi_scratch_disk.xml
  Device attached successfully

  $ virsh attach-device dasd_fedora_0e1e scsi_scratch_disk.xml
  error: Failed to attach device from scsi_scratch_disk.xml
  error: internal error: Unable to prepare scsi hostdev: scsi_host3:0:15:1074151456

I eventually discovered my error, but thought it was weird that
Libvirt doesn't provide something more helpful in this case.
Looking over the code we had just gone through, I commented out
the "internal error" message, and got something more useful:

  $ virsh attach-device dasd_fedora_0e1e scsi_scratch_disk.xml
  error: Failed to attach device from scsi_scratch_disk.xml
  error: Requested operation is not valid: SCSI device 3:0:15:1074151456 is already in use by other domain(s) as 'non-shareable'

Looking over the error paths here, we seem to issue better
messages deeper in the callchain so these "internal error"
messages overwrite any of them.  Remove them, so that the
more detailed errors are seen.
Signed-off-by: NEric Farman <farman@linux.vnet.ibm.com>

Signed-off-by: NEric Farman <farman@linux.vnet.ibm.com>

0feebab2 adds calling qemuBlockNodeNamesDetect for completed job
on updating block jobs. This affects cancelling drive mirror logic as
this function drops vm lock. Now we have to recheck all disks
before the disk with the completed block job before going
to wait for block job events.
Signed-off-by: NJiri Denemark <jdenemar@redhat.com>

Becase it can be called during migration out (namely on cancelling
blockjobs).
Signed-off-by: NJiri Denemark <jdenemar@redhat.com>

qemuDomainGetNumaParameters would return the automatic nodeset even for
the persistent config if the domain was running. This is incorrect since
the automatic nodeset will be re-queried upon starting the vm.

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1445325

We prefer c89 style of comments.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

While peer-to-peer migration enters the Confirm phase even if the
Perform phase fails, the client which initiated a non-p2p migration will
never call virDomainMigrateConfirm* API if the Perform phase failed.
Thus we need to explicitly reset migration before reporting a failure
from the Perform phase API.

https://bugzilla.redhat.com/show_bug.cgi?id=1425003Signed-off-by: NJiri Denemark <jdenemar@redhat.com>

Commit @a7035662 forgot to remove it when doing a refactor.
Signed-off-by: NErik Skultety <eskultet@redhat.com>

The recently added sanlock_strerror function can be used to translate
sanlock's numeric errors into human readable strings.

https://bugzilla.redhat.com/show_bug.cgi?id=1409511Signed-off-by: NJiri Denemark <jdenemar@redhat.com>

Migration with old QEMU which does not support query-migrate-parameters
would fail because the QMP command is called unconditionally since the
introduction of TLS migration. Previously it was only called if the user
explicitly requested a feature which uses QEMU migration parameters. And
even then the situation was not ideal, instead of reporting an
unsupported feature we'd just complain about missing QMP command.

Trivially no migration parameters are supported when
query-migrate-parameters QMP command is missing. There's no need to
report an error if it is missing, the callers will report better error
if needed.

https://bugzilla.redhat.com/show_bug.cgi?id=1441934Signed-off-by: NJiri Denemark <jdenemar@redhat.com>

Signed-off-by: NPavel Hrdina <phrdina@redhat.com>

Rather than waiting for the first save to fail, let's generate the
directory with the correct privs during initialization.
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>

There's no need to separate, so just have one.
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>

Rather than overloading one function - split apart the logic to have
separate interfaces and local/private structures to manage the data
for which the helper is collecting.
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>

Makes it a bit more clear what it is.
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>

Rather than 'nuuids' it should be 'maxuuids' and rather than 'got'
it should be 'nuuids'.  Alter the logic of the list traversal to
utilize those names.
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>

Rather than using "ret = -1" and cleanup processing, alter the return
path on failure to goto error and then just return the data.got.

In the error path, we no longer check for ret < 0, we just can free
anything added to the array and return -1 directly.
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>

Rather than dereferencing obj->def->X, create a local 'def' variable
that will dereference the def and use directly.
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>

When processing a virSecretPtr use 'secret' as a variable name.

When processing a virSecretObjPtr use 'obj' as a variable name.

When processing a virSecretDefPtr use 'def' as a variable name,
unless a distinction needs to be made with a 'newdef' such as
virSecretObjListAddLocked (which also used the VIR_STEAL_PTR macro
for the configFile and base64File).
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>

Rather than have the caller check if !obj before calling, just check
in the function for !obj and return.
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>

Make various virSecretObjList*Locked functions static and make
virSecretObjNew static since they're only called within virtsecretobj.c.
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>

Only save the config when using a generated UUID if we were able to
create an object for the def. There could have been "other reasons"
for the assignment to fail, so saving the config could be incorrect.
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>

Rather than "wait" for the first config file to be created, force creation
of the configDir during driver state initialization.
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>

Essentially virNWFilterSaveDef executed in a different order the same
sequence of calls, so let's just make one point of reference.
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>

Remove open coded helper.
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>

Rather than separate calls, use a common call and generate a better
error message which includes the incorrect uuidstr.
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>

Move from virnwfilterobj.h to virnwfilterobj.c.

Create the virNWFilterObjListNew() API in order to allocate.
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>

Prefix should have been virNWFilterObjList since the API is operating on
the list of filters.
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>

Perform the object initialization in a helper rather than inline.
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>

Move the structure to virnwfilterobj.c and create necessary accessor API's
for the various fields.

Also make virNWFilterObjFree static since there's no external callers.
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>

It is what it is anyway, so let's describe it that way too.
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>