The common idiom in the driver API implementations is roughly:

- ACL check
- BeginJob (if needed)
- AgentAvailable (if needed)
- !IsActive

A few calls had an extra !IsActive before BeginJob, which doesn't
seem to serve much use. Drop them

Migration API allows to specify a destination domain configuration.
Offline domain has only inactive XML and it is replaced by configuration
specified using VIR_MIGRATE_PARAM_DEST_XML param. In case of live
migration VIR_MIGRATE_PARAM_DEST_XML param is applied for active XML.

This commit introduces the new VIR_MIGRATE_PARAM_PERSIST_XML param
that can be used within live migration to replace persistent/inactive
configuration.

Required for: https://bugzilla.redhat.com/show_bug.cgi?id=835300

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

The value is never negative thus there's no need to store it in a signed
type.

@flags have a valid modification impact only after calling
virDomainObjUpdateModificationImpact. virDomainObjGetOneDef calls it but
doesn't update them in the caller.

Even though we have the machine locked throughout whole APIs we
are querying/modifying domain internal state. We should grab a
job whilst doing that.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

Now that we have @flags we can support changing perf events just
in active or inactive configuration regardless of the other.
Previously, calling virDomainSetPerfEvents set events in both
active and inactive configuration at once. Even though we allow
users to set perf events that are to be enabled once domain is
started up. The virDomainGetPerfEvents API was flawed too. It
returned just runtime info.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

I've noticed that these APIs are missing @flags argument. Even
though we don't have a use for them, it's our policy that every
new API must have @flags.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

Since commit v1.3.2-119-g1e34a8f9 which enabled debug-threads in QEMU
qemuGetProcessInfo would fail to parse stats for any thread with a space
in its name.

https://bugzilla.redhat.com/show_bug.cgi?id=1316803Signed-off-by: NJiri Denemark <jdenemar@redhat.com>

Move the function to qemu_domain.c and export them for further use.

Now that there are only two elements in the enum, let's change it to a
bool and rename the function similarly to the one added in previous
commit.

Introduce qemuDomainDiskChainElementRevoke that revokes the access
rather than having a flag to do so.

The function has terrible semantics. Split it into two functions.

This patch adds new xml element, and so we can have the option of
also having perf events enabled immediately at startup.
Signed-off-by: NQiaowei Ren <qiaowei.ren@intel.com>
Message-id: 1459171833-26416-6-git-send-email-qiaowei.ren@intel.com

This patch implement the internal driver API for perf event into
qemu driver.
Signed-off-by: NQiaowei Ren <qiaowei.ren@intel.com>
Message-id: 1459171833-26416-5-git-send-email-qiaowei.ren@intel.com

qemuStateInitialize uses a mix of VIR_ERROR and standard vir*Error
calls. Prefer the standard vir*Error

These uses of virGetLastError message are just duplicating
virGetLastErrorMessage.

Use qemuProcessCreatePretendCmd instead duplicating required steps from
qemuProcessStart.
Signed-off-by: NPavel Hrdina <phrdina@redhat.com>

Move all code that checks host and domain.  Do not check host if we use
VIR_QEMU_PROCESS_START_PRETEND flag.
Signed-off-by: NPavel Hrdina <phrdina@redhat.com>

This change is required by following patches.
Signed-off-by: NPavel Hrdina <phrdina@redhat.com>

In post-copy mode none of the hosts has a complete guest state and
rolling back migration is impossible. Thus aborting it would be
equivalent to destroying the domain.
Signed-off-by: NJiri Denemark <jdenemar@redhat.com>

Signed-off-by: NCristian Klein <cristiklein@gmail.com>
Signed-off-by: NJiri Denemark <jdenemar@redhat.com>

It's just a combination of AddImplicitControllers, and AddConsoleCompat.
Every caller that wants ImplicitControllers also wants the ConsoleCompat
AFAICT, so lump them together. We also need it for future patches.

We include the file in plenty of places. This is mostly due to
historical reasons. The only place that needs something from the
header file is storage_backend_fs which opens _PATH_MOUNTED. But
it gets the file included indirectly via mntent.h. At no other
place in our code we need _PATH_.*. Drop the include and
configure check then.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

Mostly it is just passing new parameter here and there. In case
of zero value we fallback to auto selecting port and thus keep
backward compatibility.

Also we need to fix places of auto selected port managment.
We should bother only when auto selected was done that is
when externally specified port is not 0.
Signed-off-by: NNikolay Shirokovskiy <nshirokovskiy@virtuozzo.com>

In qemuConnectDomainXMLToNative() we set up the monitor, but we never
memset() it to zeros.  Thanks to the introduction of the logfile
parameter of chardevs (and the logfile member of the struct), we started
checking whether that's non-NULL and that exposed this old error.
Signed-off-by: NMartin Kletzander <mkletzan@redhat.com>

These functions already report fine grained errors, there's no
benefit to overwriting the error here.

Reverting to a snapshot may change domain configuration. New
configuration should be saved if domain has persistent flag.

VIR_DOMAIN_EVENT_DEFINED_FROM_SNAPSHOT is emitted in case of
configuration update.

If use of virtlogd is enabled, then use it for backing the
character device log files too. This avoids the possibility
of a guest denial of service by writing too much data to
the log file.

After adding support for offline vcpu pinning the code that removes the
pinning for cpu cold-unplug was forgotten. This fixes up commit 02ae21de

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1316371

Memory returned from virStringSplit shall be freed with
virStringFreeList rather than VIR_FREE. Introduced in commit 511e7c5b.

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1316433

Now that the function was extracted we can get rid of some temp
variables. Additionally formatting of the bitmap string for the event
code should be checked.

The function was now beyond maintainability.

Allow pinning for inactive vcpus. The pinning mask will be automatically
applied as we would apply the default mask in case of a cpu hotplug.

Setting the scheduler settings for a vcpu has the same semantics.

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1306556

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.

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>

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

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>