When adding variants of parameter setting APIs which accepted
flags, the existing APIs were all adapted internally to pass
VIR_DOMAIN_AFFECT_CURRENT to the new API. The QEMU impl
qemuSetSchedularParameters was an exception, which instead
used VIR_DOMAIN_AFFECT_LIVE. Change this to match other
compatibility scenarios, so that calling

   virDomainSetSchedularParameters(dom, params, nparams);

Has the same semantics as

   virDomainSetSchedularParametersFlags(dom, params, nparams, 0);

And

   virDomainSetSchedularParametersFlags(dom, params, nparams, VIR_DOMAIN_AFFECT_CURRENT);
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>
(cherry picked from commit 4da9b2c1)

With our latest s/[a-z]+ReportError/virReportError/ rewrite
(47ab34e2) we forgot to update arm part of the code.
(cherry picked from commit 84a8917b)

curl_global_init is not thread-safe. curl_easy_init might call
curl_global_init when it was no called before. But curl_easy_init
can be called from different threads by the ESX driver. Therefore,
call curl_global_init from virInitialize to stop curl_easy_init from
calling it.

Reported by Benjamin Wang.
(cherry picked from commit 458c4998)

When both kvmclock and kvm_pv_eoi are configured (either disabled or
enabled) libvirt will generate invalid CPU specification due to the
fact that even though kvmclock causes the CPU to be specified, it
doesn't set have_cpu flag to true (and the new kvm_pv_eoi as well).
This patch fixes the issue and adds a test exactly for that to show
that it is fixed correctly (and also to keep it that way in the future
of course).
(cherry picked from commit 5d692cc7)

libcurl uses a SIGALRM in combination with sigsetjmp/siglongjmp to be
able to abort a DNS lookup when it takes too long. The problem with this
in a multi-threaded application is that the signal handler for SIGALRM
and the call to siglongjmp can be executed on a thread that is different
from the one that initially did the SIGALRM setup and the call to
sigsetjmp. In the reported case this triggered a segfault.

Disable libcurl's use of signals to avoid this situation. This has the
disadvantage of losing the ability to abort synchronous DNS lookups which
might result in libcurl getting stuck in a DNS lookup in the worst case.
When libcurl was build with an asynchronous DNS backend such as c-ares
then there is no problem because the timeout mechanism works without
signals here anyway.

Reported by Benjamin Wang.
(cherry picked from commit 0821ea6b)

The output buffer for virFileReadAll was too small for systems with
more than 30 CPUs which leads to a log entry and incorrect behavior.
The new size will be sufficient for the current
architectural limits.
Signed-off-by: NViktor Mihajlovski <mihajlov@linux.vnet.ibm.com>
(cherry picked from commit 4bdc8606)

I noticed that in two places, we require util-linux, and in a third,
we require util-linux-ng.  On Fedora (I tested F15 through rawhide),
util-linux-ng is obsoleted by util-linux; on RHEL 6, util-linux
is obsoleted by util-linux-ng.  That is, on either platform, either
name will get you the correct package installed (where the preferred
name on fedora is util-linux, and on RHEL 6 is util-linux-ng).  But
on RHEL 5, there is no util-linux-ng

* libvirt.spec.in (Requires): Use util-linux, not util-linux-ng.
(cherry picked from commit a9087ad1)

Use of the wrong attribute name caused the table of contents to
be useless.  Fix suggested by Daniel P. Berrange.

* docs/migration.html.in: Use correct anchoring attribute.
(cherry picked from commit eeb8c924)

Correct the check for the return value of virStrcpyStatic()
when copying port-profile names. Fixes Open vSwitch ports
which utilize port-profiles from network definitions.
Signed-off-by: NKyle Mestery <kmestery@cisco.com>
(cherry picked from commit 83aebf6d)

Commit c579d6b3 added a sledgehammer to silence spurious warnings from
gcc 4.2, but in the process, it also silenced useful warnings from
gcc 4.3 through 4.5.  As a result, a bug slipped in to commit 0caccb58.

Tested with FreeBSD (gcc 4.2.1), RHEL 6.3 (gcc 4.4), and F17 (gcc 4.7.2),
where the former didn't trip on spurious warnings, and where the latter
two detected a revert of 2b804cfa.

* m4/virt-compile-warnings.m4 (-Wno-format): Probe for the actual
spurious message, to once again allow gcc 4.4 to use -Wformat.
(cherry picked from commit 814a8dea)

When doing snapshots, the filesystem freeze function used the agent
entering function that expects the qemud_driver unlocked. This might
cause a deadlock of the qemu driver if the agent does not respond.

The only call path of this function has the qemud_driver locked, so this
patch changes the entering functions to those expecting the driver
locked.
(cherry picked from commit e0316b5e)

There was an inverted return value in lxcCgroupControllerActive().
The function assumes cgroups are active and do couple of checks
to prove that. If any of them fails, false is returned. Therefore,
at the end, after all checks are done we must return true, not false.
(cherry picked from commit 0dddd680)

Commit f1a43a8e missed one side of an #if/#else.

* src/util/processinfo.c (virProcessInfoGetAffinity): Use correct
bitmap operation.
(cherry picked from commit 9038ac65)

Clarify that domains with numeric names can only be identified by
their domain id.
(cherry picked from commit 13c69cd0)

Currently if you build on a machine that does not support SELinux we end up
with the default mount point being /selinux, since this is moved to
/sys/fs/selinux, we should start defaulting there.

I believe this is causing a bug in libvirt-lxc when /selinux does not exists,
even though /sys/fs/selinux exists.
(cherry picked from commit aa696e18)

Minimal CPU "parser" for armhf to avoid compile time warning.
Signed-off-by: NChuck Short <chuck.short@canonical.com>
(cherry picked from commit 2d0a777b)

The result is indeterminate for NULL argument to python
functions as follows. It's better to return negative value in
these situations.

PyObject_IsTrue will segfault if the argument is NULL
PyFloat_AsDouble(NULL) is -1.000000
PyLong_AsUnsignedLongLong(NULL) is 0.000000
(cherry picked from commit 4c6be02a)

In Xen 4.2, xs.h is deprecated in favor of xenstore.h.  xs.h now
contains

#warning xs.h is deprecated use xenstore.h instead
#include <xenstore.h>

which fails compilation when warnings are treated as errors.

Introduce a configure-time check for xenstore.h and if found,
use it instead of xs.h.
(cherry picked from commit 416eca18)

For historical compat we use 'itanium' as the arch name, so
if the QEMU binary suffix is 'ia64' we need to translate it
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>
(cherry picked from commit 3887afbb)

If the qemuAgentClose method is called from a place which holds
the domain lock, it is theoretically possible to get a deadlock
in the agent destroy callback. This has not been observed, but
the equivalent code in the QEMU monitor destroy callback has seen
a deadlock.

Remove the redundant locking while unrefing the object and the
bogus assignment
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>
(cherry picked from commit 362d0477)

Some users report (very rarely) seeing a deadlock in the QEMU
monitor callbacks

 Thread 10 (Thread 0x7fcd11e20700 (LWP 26753)):
 #0  0x00000030d0e0de4d in __lll_lock_wait () from /lib64/libpthread.so.0
 #1  0x00000030d0e09ca6 in _L_lock_840 () from /lib64/libpthread.so.0
 #2  0x00000030d0e09ba8 in pthread_mutex_lock () from /lib64/libpthread.so.0
 #3  0x00007fcd162f416d in virMutexLock (m=<optimized out>)
     at util/threads-pthread.c:85
 #4  0x00007fcd1632c651 in virDomainObjLock (obj=<optimized out>)
     at conf/domain_conf.c:14256
 #5  0x00007fcd0daf05cc in qemuProcessHandleMonitorDestroy (mon=0x7fcccc0029e0,
     vm=0x7fcccc00a850) at qemu/qemu_process.c:1026
 #6  0x00007fcd0db01710 in qemuMonitorDispose (obj=0x7fcccc0029e0)
     at qemu/qemu_monitor.c:249
 #7  0x00007fcd162fd4e3 in virObjectUnref (anyobj=<optimized out>)
     at util/virobject.c:139
 #8  0x00007fcd0db027a9 in qemuMonitorClose (mon=<optimized out>)
     at qemu/qemu_monitor.c:860
 #9  0x00007fcd0daf61ad in qemuProcessStop (driver=driver@entry=0x7fcd04079d50,
     vm=vm@entry=0x7fcccc00a850,
     reason=reason@entry=VIR_DOMAIN_SHUTOFF_DESTROYED, flags=flags@entry=0)
     at qemu/qemu_process.c:4057
 #10 0x00007fcd0db323cf in qemuDomainDestroyFlags (dom=<optimized out>,
     flags=<optimized out>) at qemu/qemu_driver.c:1977
 #11 0x00007fcd1637ff51 in virDomainDestroyFlags (
     domain=domain@entry=0x7fccf00c1830, flags=1) at libvirt.c:2256

At frame #10 we are holding the domain lock, we call into
qemuProcessStop() to cleanup QEMU, which triggers the monitor
to close, which invokes qemuProcessHandleMonitorDestroy() which
tries to obtain the domain lock again. This is a non-recursive
lock, hence hang.

Since qemuMonitorPtr is a virObject, the unref call in
qemuProcessHandleMonitorDestroy no longer needs mutex
protection. The assignment of priv->mon = NULL, can be
instead done by the caller of qemuMonitorClose(), thus
removing all need for locking.
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>
(cherry picked from commit 25f582e3)

If QEMU quits immediately after we opened the monitor it was
possible we would skip the clearing of the SELinux process
socket context
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>
(cherry picked from commit 0b62c073)

When calling qemuProcessKill from the virDomainDestroy impl
in QEMU, do not ignore the return value. This ensures that
if QEMU fails to respond to SIGKILL, the caller will know
about the failure.
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>
(cherry picked from commit f1b4021b)

Depending on the scenario in which LXC containers exit, it is
possible for the EOF callback of the LXC monitor to deadlock
the driver.

  #0  0x00000038a0a0de4d in __lll_lock_wait () from /lib64/libpthread.so.0
  #1  0x00000038a0a09ca6 in _L_lock_840 () from /lib64/libpthread.so.0
  #2  0x00000038a0a09ba8 in pthread_mutex_lock () from /lib64/libpthread.so.0
  #3  0x00007f4bd9579d55 in virMutexLock (m=<optimized out>) at util/threads-pthread.c:85
  #4  0x00007f4bcacc7597 in lxcDriverLock (driver=0x7f4bc40c8290) at lxc/lxc_conf.h:81
  #5  virLXCProcessMonitorEOFNotify (mon=<optimized out>, vm=0x7f4bb4000b00) at lxc/lxc_process.c:581
  #6  0x00007f4bd9645c91 in virNetClientCloseLocked (client=client@entry=0x7f4bb4009e60)
      at rpc/virnetclient.c:554
  #7  0x00007f4bd96460f8 in virNetClientIOEventLoopPassTheBuck (thiscall=0x0, client=0x7f4bb4009e60)
      at rpc/virnetclient.c:1306
  #8  virNetClientIOEventLoopPassTheBuck (client=0x7f4bb4009e60, thiscall=0x0)
      at rpc/virnetclient.c:1287
  #9  0x00007f4bd96467a2 in virNetClientCloseInternal (reason=3, client=0x7f4bb4009e60)
      at rpc/virnetclient.c:589
  #10 virNetClientCloseInternal (client=0x7f4bb4009e60, reason=3) at rpc/virnetclient.c:561
  #11 0x00007f4bcacc4a82 in virLXCMonitorClose (mon=0x7f4bb4000a00) at lxc/lxc_monitor.c:201
  #12 0x00007f4bcacc55ac in virLXCProcessCleanup (reason=<optimized out>, vm=0x7f4bb4000b00,
      driver=0x7f4bc40c8290) at lxc/lxc_process.c:240
  #13 virLXCProcessStop (driver=0x7f4bc40c8290, vm=vm@entry=0x7f4bb4000b00,
      reason=reason@entry=VIR_DOMAIN_SHUTOFF_DESTROYED) at lxc/lxc_process.c:735
  #14 0x00007f4bcacc5bd2 in virLXCProcessAutoDestroyDom (payload=<optimized out>,
      name=0x7f4bb4003c80, opaque=0x7fff41af2df0) at lxc/lxc_process.c:94
  #15 0x00007f4bd9586649 in virHashForEach (table=0x7f4bc409b270,
      iter=iter@entry=0x7f4bcacc5ab0 <virLXCProcessAutoDestroyDom>, data=data@entry=0x7fff41af2df0)
      at util/virhash.c:514
  #16 0x00007f4bcacc52d7 in virLXCProcessAutoDestroyRun (driver=driver@entry=0x7f4bc40c8290,
      conn=conn@entry=0x7f4bb8000ab0) at lxc/lxc_process.c:120
  #17 0x00007f4bcacca628 in lxcClose (conn=0x7f4bb8000ab0) at lxc/lxc_driver.c:128
  #18 0x00007f4bd95e67ab in virReleaseConnect (conn=conn@entry=0x7f4bb8000ab0) at datatypes.c:114

When the driver calls virLXCMonitorClose, there is really no
need for the EOF callback to be invoked in this case, since
the caller can easily handle events itself. In changing this,
the monitor needs to take a deep copy of the callback list,
not merely a reference.

Also adds debug statements in various places to aid
troubleshooting
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>
(cherry picked from commit 36c1fc18)

Xen upstream c/s 24102:dc8e55c9 bumped the sysctl version to 9.
Support this sysctl version in the xen_hypervisor sub-driver.
(cherry picked from commit 371ddc98)

Jim Fehlig reported a compilation error with older gcc 4.3.4:

libvirt.c: In function 'virDomainGetEmulatorPinInfo':
libvirt.c:9111: error: logical '&&' with non-zero constant will always evaluate as true [-Wlogical-op]

It looks like someone programmed via too much copy-and-paste.

* src/libvirt.c (virDomainGetEmulatorPinInfo): Multiplying by 1 is
a no-op, and thus will never overflow.
(cherry picked from commit 3da355e8)

Signed-off-by: NDmitry Guryanov <dguryanov@parallels.com>
(cherry picked from commit adae5cf7)

size of videos array must be increased.
Signed-off-by: NDmitry Guryanov <dguryanov@parallels.com>
(cherry picked from commit 9ca569de)

SELinux wants all log files opened with O_APPEND. When
running non-root though, libvirtd likes to use O_TRUNC
to avoid log files growing in size indefinitely. Instead
of using O_TRUNC though, we can use O_APPEND and then
call ftruncate() which keeps SELinux happier.
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>
(cherry picked from commit 639d5c49)

There is no need to hold the mutex when unref'ing
virObject instances
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>
(cherry picked from commit 7307c3c0)

Asynchronously setting priv->mon to NULL was pointless,
just remove the destroy callback entirely.
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>
(cherry picked from commit dd037176)

Remove custom reference counting from virLXCMonitor, using
virObject instead
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>
(cherry picked from commit 09e0cb42)

Continue consolidation of process functions by moving some
helpers out of command.{c,h} into virprocess.{c,h}
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>
(cherry picked from commit 9467ab60)

There are a number of process related functions spread
across multiple files. Start to consolidate them by
creating a virprocess.{c,h} file
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>
(cherry picked from commit e5e2b65c)

The virCommand prefix was inappropriate because the API
does not use any virCommandPtr object instance. This
API closely related to waitpid/exit, so use virProcess
as the prefix
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>
(cherry picked from commit 49ecf8b4)

Change "Pid" to "Process" to align with the virProcessKill
API naming prefix
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>
(cherry picked from commit 0fb58ef5)

Changing naming to follow the convention of "object" followed
by "action"
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>
(cherry picked from commit cf470068)

A prefix change to unmount the SELinux filesystem broke starting
of LXC containers with a custom root filesystem
(cherry picked from commit 1532bd49)

--enable-compile-warnings=error has been renamed to --enable-werror so
update the HACKING and the hacking.html to reflect that.
(cherry picked from commit 07cbb610)

Commit 9298bfbc introduced code to detect if netcf is linked with
libnl1, and to prefer libnl1 over libnl3 when this is the case.
This behaviour can be disabled by setting LIBNL_CFLAGS to any value,
including the empty string.
However, configure.ac sets LIBNL_CFLAGS to "" before attempting
libnl detection, so the libnl1 detection code is always disabled.
This caused issues on my f17 system where netcf is linked with libnl1
but libvirt got built with libnl3.

This commit removes the setting of the LIBNL_* variables to "" as
this does not appear to be needed. After this change, libnl1 is
used when building libvirt on my f17 system.
(cherry picked from commit f6c29515)