Valgrind complained:

==23975== Conditional jump or move depends on uninitialised value(s)
==23975==    at 0x22255FA6: qemuDomainGetBlockJobInfo (qemu_driver.c:16538)
==23975==    by 0x538E97C: virDomainGetBlockJobInfo (libvirt-domain.c:9685)
==23975==    by 0x12F740: remoteDispatchDomainGetBlockJobInfoHelper (remote.c:2834)
==23975==    by 0x53FF287: virNetServerProgramDispatch (virnetserverprogram.c:437)
==23975==    by 0x540523D: virNetServerProcessMsg (virnetserver.c:135)
==23975==    by 0x54052C7: virNetServerHandleJob (virnetserver.c:156)
==23975==    by 0x52F515B: virThreadPoolWorker (virthreadpool.c:145)
==23975==    by 0x52F4668: virThreadHelper (virthread.c:206)
==23975==    by 0x6E08A50: start_thread (in /lib64/libpthread-2.12.so)
==23975==    by 0x82BE93C: clone (in /lib64/libc-2.12.so)
==23975==
==23975== Conditional jump or move depends on uninitialised value(s)
==23975==    at 0x22255FB4: qemuDomainGetBlockJobInfo (qemu_driver.c:16542)
==23975==    by 0x538E97C: virDomainGetBlockJobInfo (libvirt-domain.c:9685)
==23975==    by 0x12F740: remoteDispatchDomainGetBlockJobInfoHelper (remote.c:2834)
==23975==    by 0x53FF287: virNetServerProgramDispatch (virnetserverprogram.c:437)
==23975==    by 0x540523D: virNetServerProcessMsg (virnetserver.c:135)
==23975==    by 0x54052C7: virNetServerHandleJob (virnetserver.c:156)
==23975==    by 0x52F515B: virThreadPoolWorker (virthreadpool.c:145)
==23975==    by 0x52F4668: virThreadHelper (virthread.c:206)
==23975==    by 0x6E08A50: start_thread (in /lib64/libpthread-2.12.so)
==23975==    by 0x82BE93C: clone (in /lib64/libc-2.12.so)

If no matching block job is found, qemuMonitorGetBlockJobInfo returns 0
and we should not write anything to the caller-supplied
virDomainBlockJobInfo pointer.
Signed-off-by: NMichael Chapman <mike@very.puzzling.org>

While 'perl test-wrap-argv.pl' is not too long,
'./test-wrap-argv.pl' is shorter.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

So, after bec787ee we are building virt-login-shell
independent of LXC driver. This is nice, but the binary is
enabled by default which makes no sense on mingw. In fact, it
triggers some compilation errors there:

  CC       virt_login_shell-virt-login-shell.o
../../tools/virt-login-shell.c: In function 'main':
../../tools/virt-login-shell.c:289:15: error: implicit declaration of function 'sysconf' [-Werror=implicit-function-declaration]
     openmax = sysconf(_SC_OPEN_MAX);
               ^
../../tools/virt-login-shell.c:289:5: error: nested extern declaration of 'sysconf' [-Werror=nested-externs]
     openmax = sysconf(_SC_OPEN_MAX);
     ^
../../tools/virt-login-shell.c:289:23: error: '_SC_OPEN_MAX' undeclared (first use in this function)
     openmax = sysconf(_SC_OPEN_MAX);
                       ^
../../tools/virt-login-shell.c:289:23: note: each undeclared identifier is reported only once for each function it appears in
cc1: all warnings being treated as errors

While we could workaround sysconf(_SC_OPEN_MAX) issue, the binary
itself makes no sense on systems where no LXC can be spawned.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

This is no functional change, but I find it disturbing that
something_LDADD contains PIE_LDFLAGS while something_LDFLAGS
doesn't.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

The manpage for sysconf() suggest including unistd.h as the
function is declared there. Even though we are not hitting any
compile issues currently, let's include the correct header file
instead of relying on some hidden include chain.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

So you have a libvirt volume that you want to wipe out. But lets
say that the volume is actually a file stored on a journaled
filesystem. Overwriting it with zeroes or a pattern does not mean
that corresponding physical location on the disk is overwritten
too, due to journaling. It's the same story with network based
volumes, copy-on-write filesystems, and so on. Since there is no
way that an userland application can write onto specific areas on
disk, all that we can do is document the fact.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

In case of prlsdkLoadDomains fails, vzOpenDefault should
clear connection privateData pointer every time its
memory is actually freed.
Also it is not necessary to call vzConnectClose if a call
to vzOpenDefault fails, because they both make cleanup of
connection privateData.
Signed-off-by: NMaxim Nestratov <mnestratov@virtuozzo.com>

By default, QEMU truncates serial file on open. Sometimes, it could be weird -
for example, when we are trying to investigate some event, which occured several
restarts ago. This patch adds an ability to preserve previous content.
Signed-off-by: NDmitry Mishin <dim@virtuozzo.com>

Currently, there is no possibility for user to specify desired behaviour of
output to file - truncate or append. This patch adds an ability to explicitly
specify that user wants to preserve file's content on reopen.
Signed-off-by: NDmitry Mishin <dim@virtuozzo.com>

Signed-off-by: NDmitry Mishin <dim@virtuozzo.com>

Implement VIR_DOMAIN_UNDEFINE_MANAGED_SAVE and
VIR_DOMAIN_UNDEFINE_SNAPSHOTS_METADATA flags support.
Signed-off-by: NMaxim Nestratov <mnestratov@virtuozzo.com>

prlsdkCleanupBridgedNet call should be made strongly after
any actual domain deletion accurs. By doing this we avoid
any potential problems connected with second undefine call
when it is made after first one fails by some reason, and
we detect that network is already deleted.
Signed-off-by: NMaxim Nestratov <mnestratov@virtuozzo.com>

Currently vz driver unregisters domains when undefine is called,
which is wrong because it contradicts with expected behavior.
All vz domains are persistent, which means that when one is
defined a new bundle directory containing meta data is created.
Undefining domains in a way we do now leaves those directories
undeleted, which prevents subsequent define call for the same
domain xml. I.e. the following sequence define->undefine->define
doesn't work now.
The patch fixes the problem by calling PrlVm_Delete instead of
PrlVm_Unreg detaching all disks prior actually doing this to
prevent images deletion.
Signed-off-by: NMaxim Nestratov <mnestratov@virtuozzo.com>

Both detach and reattach are complex operations involving several steps,
and it can be useful to be able to follow along by reading the log.

Since we don't detach unmanaged devices before attaching them to a
domain, we shouldn't reattach them to rollback an error either.

We want to eventually factor out the code dealing with device detaching
and reattaching, so that we can share it and make sure it's called eg.
when 'virsh nodedev-detach' is used.

For that to happen, it's important that the lists of active and inactive
PCI devices are updated every time a device changes its state.

Instead of passing NULL as the last argument of virPCIDeviceDetach() and
virPCIDeviceReattach(), pass the proper list so that it can be updated.

This replaces the virPCIKnownStubs string array that was used
internally for stub driver validation.

Advantages:

  * possible values are well-defined
  * typos in driver names will be detected at compile time
  * avoids having several copies of the same string around
  * no error checking required when setting / getting value

The names used mirror those in the
virDomainHostdevSubsysPCIBackendType enumeration.

The value is not inspected inside the function, so it makes more
sense for the caller to change the device's setting explicitly.

This internal function supports, in theory, binding to a different
stub driver than the one the PCI device has been configured to use.

In practice, it is only ever called like

  virPCIDeviceBindToStub(dev, dev->stubDriver);

which makes its second parameter redundant. Get rid of it, along
with the extra string copy required to support it.

Commmit df8192aa introduced admin related rename and some minor
(caused by automated approach, aka sed) and some more severe isues along with
it. First reason to revert is the inconsistency with libvirt library.
Although we deal with the daemon directly rather than with a specific
hypervisor, we still do have a connection. That being said, contributors might
get under the impression that AdmDaemonNew would spawn/start a new daemon
(since it's admin API, why not...), or AdmDaemonClose would do the exact
opposite or they might expect DaemonIsAlive report overall status of the daemon
which definitely isn't the case.
The second reason to revert this patch is renaming virt-admin client. The
client tool does not necessarily have to reflect the names of the API's it's
using in his internals. An example would be 's/vshAdmConnect/vshAdmDaemon'
where noone can be certain of what the latter function really does. The former
is quite expressive about some connection magic it performs, but the latter does
not say anything, especially when vshAdmReconnect and vshAdmDisconnect were
left untouched.

From: Ian Campbell <ian.campbell@citrix.com>

xend prior to 4.0 understands vcpus as maxvcpus and vcpu_avail
as a bit map of which cpus are online (default is all).

xend from 4.0 onwards understands maxvcpus as maxvcpus and
vcpus as the number which are online (from 0..N-1). The
upstream commit (68a94cf528e6 "xm: Add maxvcpus support")
claims that if maxvcpus is omitted then the old behaviour
(i.e. obeying vcpu_avail) is retained, but AFAICT it was not,
in this case vcpu==maxcpus==online cpus. This is good for us
because handling anything else would be fiddly.

This patch changes parsing of the virDomainDef maxvcpus and vcpus
entries to use the corresponding 'maxvcpus' and 'vcpus' settings
from xm and xl config. It also drops use of the old Xen 3.x
'vcpu_avail' setting.

The change also removes the maxvcpus limit of MAX_VIRT_VCPUS (since
maxvcpus is simply a count, not a bit mask), which is particularly
crucial on ARM where MAX_VIRT_CPUS == 1 (since all guests are
expected to support vcpu placement, and therefore only the boot
vcpu's info lives in the shared info page).

Existing tests adjusted accordingly, and new tests added for the
'maxvcpus' setting.

https://bugzilla.redhat.com/show_bug.cgi?id=1281710

Commit id '3c7590e0' added the flag to the rbd backend, but provided
no means via virsh to use the flag.  This patch adds a '--delete-snapshots'
option to both the "undefine" and "vol-delete" commands.

For "undefine", the flag is combined with the "--remove-all-storage" flag
in order to add the appropriate flag for the virStorageVolDelete call;
whereas, for the "vol-delete" command, just the flag is sufficient since
it's only operating on one volume.

Currently only supported for rbd backends.

Although they've been present for quite a while, they weren't added
to the API definition, so add them there to make it clearer.

Currently only the RBD backend even checks for any flags.

The initial commit '74951ead' did not include the proper check for whether
any flags are supported by the driver.

Even though the driver doesn't support VIR_STORAGE_VOL_DELETE_ZEROED,
it still checks and allows the processing to continue

Also add the new VIR_STORAGE_VOL_DELETE_WITH_SNAPSHOTS since it is handled
as of commit id '3c7590e0'.

Commit id '71ce4759' altered the cgroup processing with respect to the
call to virCgroupAddTask being moved out from lower layers into the calling
layers especially for qemu processing of emulator and vcpu threads. The
movement affected lxc insomuch as it is possible for a code path to
return a NULL cgroup *and* a 0 return status via virCgroupNewPartition
failure when virCgroupNewIgnoreError succeeded when virCgroupNewMachineManual
returns. Coverity pointed out that would cause virCgroupAddTask to core.

This patch will check for a NULL cgroup as well as the negative return
and just return the NULL cgroup to the caller (as it would have previously)

xendConfigVersion is no longer used, so remove it from the
xenUnifiedPrivate struct.
Signed-off-by: NJim Fehlig <jfehlig@suse.com>

Remove use of xendConfigVersion in the s-expresion config formatter/parser
in src/xenconfig/. Adjust callers in the xen and libxl drivers accordingly.
Signed-off-by: NJim Fehlig <jfehlig@suse.com>

Remove use of XEND_CONFIG_VERSION_* in xend_internal.c
Signed-off-by: NJim Fehlig <jfehlig@suse.com>

Remove use of XEND_CONFIG_VERSION_* in the Xen unified driver.
Signed-off-by: NJim Fehlig <jfehlig@suse.com>

Remove use of XEND_CONFIG_VERSION_* in s-expression parser/formatter.
Signed-off-by: NJim Fehlig <jfehlig@suse.com>

Change all xml2sexpr tests to use the latest XEND_CONFIG_VERSION
(XEND_CONFIG_VERSION_3_1_0 = 4). Fix tests that do not conform to
the latest version.
Signed-off-by: NJim Fehlig <jfehlig@suse.com>

It has been quite some time since xend required specifying cdroms
and fds in '(image (hvm ...))'. Remove the code from the parsing
and formatting functions and fixup the associated tests.
Signed-off-by: NJim Fehlig <jfehlig@suse.com>

Change all sexpr2xml tests to use the latest XEND_CONFIG_VERSION
(XEND_CONFIG_VERSION_3_1_0 = 4). Fix tests that do not conform to
the latest version.
Signed-off-by: NJim Fehlig <jfehlig@suse.com>

Remove use of xendConfigVersion in the xm and xl config formatter/parsers
in src/xenconfig/. Adjust callers in the xen and libxl drivers accordingly.
Signed-off-by: NJim Fehlig <jfehlig@suse.com>

Remove use of XEND_CONFIG_VERSION_* in xm parser/formatter.
Signed-off-by: NJim Fehlig <jfehlig@suse.com>

Remove use of XEND_CONFIG_VERSION_* from xenconfig/xen_common.c
Signed-off-by: NJim Fehlig <jfehlig@suse.com>

Change all tests to use the latest XEND_CONFIG_VERSION
(XEND_CONFIG_VERSION_3_1_0 = 4). Fix tests that do not conform to
the latest version.
Signed-off-by: NJim Fehlig <jfehlig@suse.com>

Remove XML to s-expression converstion tests for old xend 3.0.2
config format.
Signed-off-by: NJim Fehlig <jfehlig@suse.com>

Remove s-expression to XML conversion tests for old xend 3.0.2
config format.
Signed-off-by: NJim Fehlig <jfehlig@suse.com>

Remove the fullvirt-net-ioemu test since explicitly specifying
'type=ioemu' has not been needed in xm/xend for a long time. It is
not used at all in xl/libxl.
Signed-off-by: NJim Fehlig <jfehlig@suse.com>