To avoid having to forbid new features added to domain XML in post parse
callbacks for individual hypervisor drivers the feature flag mechanism
will allow to add a central check that will be disabled for the drivers
that will add support.

As a first example flag, the 'hasWideSCSIBus' is converted to the new
bitmap.

The API documentation states that the function is returning pinning for
all vCPUs, so we can actually do so if the user passes a large enough
array.

The implementation of the inner guts of the function is similar for all
drivers, so we can add a helper and not have to reimplement it three
times.

The API docs state that the API queries pinning info for all vCPUs and
thus we should allocate the bitmap even for the inactive ones.

The API will currently return bitmap only for the active vCPUs but that
will change in the future.

Signed-off-by: NJiri Denemark <jdenemar@redhat.com>

The VIR_DOMAIN_EVENT_ID_JOB_COMPLETED event will be triggered once a job
(such as migration) finishes and it will contain statistics for the job
as one would get by calling virDomainGetJobStats. Thanks to this event
it is now possible to get statistics of a completed migration of a
transient domain on the source host.
Signed-off-by: NJiri Denemark <jdenemar@redhat.com>

We would happily report and free statistics of a completed migration
even before it actually completed (on the source host while migration is
in the Finish phase).
Signed-off-by: NJiri Denemark <jdenemar@redhat.com>

Computing a total downtime during a migration requires us to store a
time stamp when guest CPUs get stopped. The value (and all other
statistics) is then transferred to the destination to compute the
downtime. Because the stopped time stamp is stored by a STOP event
handler while the statistics which will be sent over to the destination
are copied synchronously within qemuMigrationWaitForCompletion.

Depending on the timing of STOP and MIGRATION events, we may end up
copying (and transferring) statistics without the stopped time stamp
set. Let's make sure we always use the correct time stamp.

https://bugzilla.redhat.com/show_bug.cgi?id=1282744Signed-off-by: NJiri Denemark <jdenemar@redhat.com>

With a very old QEMU which doesn't support events we need to explicitly
call qemuMigrationSetOffline at the end of migration to update our
internal state. On the other hand, if we talk to QEMU using QMP, we
should just wait for the STOP event and let the event handler update the
state and trigger a libvirt event.
Signed-off-by: NJiri Denemark <jdenemar@redhat.com>

We should not overwrite all migration statistics on the source with the
numbers sent by the destination since the source may have an updated
view in some cases (such as post-copy migration). It's safer to update
just the timing info we need to get from the destination and be prepared
for the future. And we should only do all this after a successful
migration.
Signed-off-by: NJiri Denemark <jdenemar@redhat.com>

Statistics for a completed migration only make sense if the migration
was successful. Let's not store them in priv->job.completed until we
are sure it was a success.
Signed-off-by: NJiri Denemark <jdenemar@redhat.com>

NULL checks are performed implicitly in the rest of the module,
including other allocations in the very same function.

The comment claimed that virPCIDeviceReattach() does not reattach
a device to the host driver; except it actually does, so the
comment is just confusing and we're better off removing it.

Replace the term "loop" with the more generic "step". This allows us
to be more flexible and eg. have a step that consists in a single
function call.

Don't include the number of steps in the first comment of the
function, so that we can add or remove steps without having to worry
about keeping that comment in sync.

For the same reason, remove the summary contained in that comment.

Clean up some weird vertical spacing while we're at it.

Instead of considering each single step its own test case, create
high level test cases that reproduce a certain scenario.

Always call CHECK_LIST_COUNT() to check the size of both the active
and inactive devices list.

virPCIDeviceListCount()'s return type is size_t, so variables that
store its return value should be of that type.

The 'actualCount' variable, formerly just 'count', is only used
internally by the macro, so it's better to move its declaration
inside the macro as well: this way, it doesn't have to be declared
by every single user.

The new name is less generic to make clashes less likely.

Change the extremely generic count1 and count2 to the more
descriptive active_count and inactive_count.

When checking the number of devices added to a device list, use the
nhostdevs variable instead of its value, so that the test can keep
working even if more hostdevs are added.

If the stars are in the right position and you're building with
VBox >= 4.2.0 it will happen that compiler thinks an array
allocated on the stack may be unbounded:

In file included from vbox/vbox_V4_2.c:13:0:
vbox/vbox_tmpl.c: In function '_virtualboxCreateMachine':
vbox/vbox_tmpl.c:2811:1: error: stack usage might be unbounded [-Werror=stack-usage=]
 _virtualboxCreateMachine(vboxGlobalData *data, virDomainDefPtr def, IMachine **machine, char *uuidstr ATTRIBUTE_UNUSED)
 ^

Well, given how the variable is declared, I had some hard time
seeing it is actually bounded. Surprisingly compiler does not
complain because of -Wframe-larger-than. This is because
variable length arrays do not count into that warning.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

Signed-off-by: NJohn Ferlan <jferlan@redhat.com>

So far it hasn't bitten us, but if the next value wasn't 4, then
the logic used to check flag bits would have issues.

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1315059Signed-off-by: NShanzhi Yu <shyu@redhat.com>

The code does not handle renaming of the save state file. In addition to
that the resuming code would need to be tweaked to handle the name
change since the XML is extracted from the save image. The easies option
is to make the rename API even less useful by forbiding this.

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1314594

This is an error message I've just seen. Fix it by initializing
@inode.

  CC       lxc/libvirt_driver_lxc_impl_la-lxc_process.lo
lxc/lxc_process.c: In function 'virLXCProcessMonitorInitNotify':
lxc/lxc_process.c:767:23: error: 'inode' may be used uninitialized in this function [-Werror=maybe-uninitialized]
     virDomainAuditInit(vm, initpid, inode);
                       ^
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

Original current flag expansion does not filter out non
_CONFIG and _LIVE flags explicitly but they are prohibited
earlier by virCheckFlags.
Signed-off-by: NNikolay Shirokovskiy <nshirokovskiy@virtuozzo.com>

Signed-off-by: NNikolay Shirokovskiy <nshirokovskiy@virtuozzo.com>

Flag expansion is the same as in virDomainObjUpdateModificationImpact
which virDomainLiveConfigHelperMethod calls internally. The difference
is merely in implementation. Note that VIR_DOMAIN_MEM_CONFIG is the
same as VIR_DOMAIN_AFFECT_CONFIG.  Additionally, the called functions
will properly use flag OR and thus handle the VIR_DOMAIN_MEM_MAXIMUM case.
Signed-off-by: NNikolay Shirokovskiy <nshirokovskiy@virtuozzo.com>

Commit 035947eb introduced a call to virConnectGetURI
without a matching free() in virshCatchDisconnect.

Also fix vshAdmCatchDisconnect where it was copied by
commit 6dd7e42d.

https://bugzilla.redhat.com/show_bug.cgi?id=1303891

While trying to build with -Os couple of compile errors showed
up.

conf/domain_conf.c: In function 'virDomainChrRemove':
conf/domain_conf.c:13666:24: error: 'ret' may be used uninitialized in this function [-Werror=maybe-uninitialized]
     virDomainChrDefPtr ret, **arrPtr = NULL;
                        ^
Compiler fails to see that @ret is used only if set in the loop,
but whatever, there's no harm in initializing the variable.

In vboxAttachDrivesNew and _vboxAttachDrivesOld compiler thinks
that @rc may be used uninitialized. Well, not directly, but maybe
after some optimization. Yet again, no harm in initializing a
variable.

In file included from ./util/virthread.h:26:0,
                 from ./datatypes.h:28,
                 from vbox/vbox_tmpl.c:43,
                 from vbox/vbox_V3_1.c:37:
vbox/vbox_tmpl.c: In function '_vboxAttachDrivesOld':
./util/virerror.h:181:5: error: 'rc' may be used uninitialized in this function [-Werror=maybe-uninitialized]
     virReportErrorHelper(VIR_FROM_THIS, code, __FILE__,              \
     ^
In file included from vbox/vbox_V3_1.c:37:0:
vbox/vbox_tmpl.c:1041:14: note: 'rc' was declared here
     nsresult rc;
              ^
Yet again, one uninitialized variable:

qemu/qemu_driver.c: In function 'qemuDomainBlockCommit':
qemu/qemu_driver.c:17194:9: error: 'baseSource' may be used uninitialized in this function [-Werror=maybe-uninitialized]
         qemuDomainPrepareDiskChainElement(driver, vm, baseSource,
         ^

And another one:

storage/storage_backend_logical.c: In function 'virStorageBackendLogicalMatchPoolSource.isra.2':
storage/storage_backend_logical.c:618:33: error: 'thisSource' may be used uninitialized in this function [-Werror=maybe-uninitialized]
                       thisSource->devices[j].path))
                                 ^
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

While trying to build with -Os I've encountered some build
failures.

util/vircommand.c: In function 'virCommandAddEnvFormat':
util/vircommand.c:1257:1: error: inlining failed in call to 'virCommandAddEnv': call is unlikely and code size would grow [-Werror=inline]
 virCommandAddEnv(virCommandPtr cmd, char *env)
 ^
util/vircommand.c:1308:5: error: called from here [-Werror=inline]
     virCommandAddEnv(cmd, env);
     ^
This function is big enough for the compiler to be not inlined.
This is the error message I'm seeing:

Then virDomainNumatuneNodeSpecified is exported and called from
other places. It shouldn't be inlined then.

In file included from network/bridge_driver_platform.h:30:0,
                 from network/bridge_driver_platform.c:26:
network/bridge_driver_linux.c: In function 'networkRemoveRoutingFirewallRules':
./conf/network_conf.h:350:1: error: inlining failed in call to 'virNetworkDefForwardIf.constprop': call is unlikely and code size would grow [-Werror=inline]
 virNetworkDefForwardIf(const virNetworkDef *def, size_t n)
 ^
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

Reporting status of a control connection makes no sense for an inactive
domain.

https://bugzilla.redhat.com/show_bug.cgi?id=1281706Signed-off-by: NJiri Denemark <jdenemar@redhat.com>

Signed-off-by: NJiri Denemark <jdenemar@redhat.com>

remoteDispatchConnectCloseCallbackRegister introduced in
f484310a has problems. It refcounts network client object and in case of NOOP
driver operations for registering/unregistering close callback (any driver
except for vz) nobody will unref it later. As a result, client connection
will not be disposed and driver connection will not be closed.

The fix is easy. We don't need to refcount at all. We don't get a dangling
pointer because in remoteClientFreeFunc, which is called
upon disposing this network client object, we unregister the close
callback.
Signed-off-by: NNikolay Shirokovskiy <nshirokovskiy@virtuozzo.com>
Signed-off-by: NErik Skultety <eskultet@redhat.com>

More fallout from changing to using virPolkitAgent and handling error
paths.  Needed to clear the 'cmd' once stored and of course add the
virCommandFree(cmd) in the error: label.

Older compilers fail to see that 'close' is not used a function
rather than a variable and produce the following error:

cc1: warnings being treated as errors
../../src/datatypes.c: In function 'virConnectCloseCallbackDataReset':
../../src/datatypes.c:149: error: declaration of 'close' shadows a global declaration [-Wshadow]

Replace all the 'close' occurrences with 'closeData' to resolve
this.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

In virPolkitAgentCreate neglected to initialize agent to NULL. If
there was an error in the pipe, then we jump to error and would have
an issue. Found by coverity.