Replace:
if (virBufferError(&buf)) {
    virBufferFreeAndReset(&buf);
    virReportOOMError();
    ...
}

with:
if (virBufferCheckError(&buf) < 0)
    ...

This should not be a functional change (unless some callers
misused the virBuffer APIs - a different error would be reported
then)

So far, we only report an error if formatting the siblings bitmap
in NUMA topology fails.

Be consistent and always report error in virCapabilitiesFormatXML.

Check if the buffer is in error state and report an error if it is.

This replaces the pattern:
if (virBufferError(buf)) {
    virReportOOMError();
    goto cleanup;
}
with:

if (virBufferCheckError(buf) < 0)
    goto cleanup;

Document typical buffer usage to favor this.
Also remove the redundant FreeAndReset - if an error has
been set via virBufferSetError, the content is already freed.

This function didn't report an error on OOM. Better delete it
and use virStringReplace instead. :)

If v6present is false, this code is not reachable.
Also, there is no need to check for errors twice.

Reindent nwfilter gentech driver and one block in rbd storage backend.

https://bugzilla.redhat.com/show_bug.cgi?id=1086121

We now support startupPolicy='optional' for disks, but this
should work only for cold boot, not for restore or migrate.
Signed-off-by: NPavel Hrdina <phrdina@redhat.com>

The comments for lxcDomainCreateXMLWithFiles are out of date. So update them.
And add comments for lxcDomainCreateXML
Signed-off-by: NWang Rui <moon.wangrui@huawei.com>
Signed-off-by: NYue wenyuan <yuewenyuan@huawei.com>
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

My commit fba6bc47 iterated over the features in cpu definition
without checking if there is one.

This introduces two new attributes "cmd_per_lun" and "max_sectors" same
with the names QEMU uses for virtio-scsi. An example of the XML:

<controller type='scsi' index='0' model='virtio-scsi' cmd_per_lun='50'
max_sectors='512'/>

The corresponding QEMU command line:

-device virtio-scsi-pci,id=scsi0,cmd_per_lun=50,max_sectors=512,
bus=pci.0,addr=0x3
Signed-off-by: NMike Perez <thingee@gmail.com>
Signed-off-by: NJán Tomko <jtomko@redhat.com>

Add suport for invariant TSC flag (CPUID 0x80000007, bit 8 of EDX).
If this flag is enabled, the TSC ticks at a constant rate across
all ACPI P-, C- and T-states.

This can be enabled by adding:
<feature name='invtsc'/>
to the <cpu> element.

Migration and saving the domain does not work with this flag.

QEMU support: http://git.qemu.org/?p=qemu.git;a=commitdiff;h=303752a

The feature name "invtsc" differs from the name "" used by the linux kernel:
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/arch/x86/kernel/cpu/powerflags.c?id=30321c7b#n18

The IDE bus doesn't support readonly disks, so inform the user with an
error message instead of let qemu fail with a more obscure "Device
'ide-hd' could not be initialized" error message.

Closes: https://bugzilla.redhat.com/show_bug.cgi?id=1112939Signed-off-by: NGiuseppe Scrivano <gscrivan@redhat.com>

Signed-off-by: NMartin Kletzander <mkletzan@redhat.com>

We have the following matrix of possible arguments handled by the logic
statement touched by this patch:
       | flags & _REUSE_EXT | !(flags & _REUSE_EXT)
-------+--------------------+----------------------
 format| (1)                | (2)
-------+--------------------+----------------------
!format| (3)                | (4)
-------+--------------------+----------------------

In cases 1 and 2 the user provided a format, in cases 3 and 4 not. The
user requests to use a pre-existing image in 1 and 3 and libvirt will
create a new image in 2 and 4.

The difference between cases 3 and 4 is that for 3 the format is probed
from the user-provided image, whereas in 4 we just use the existing disk
format.

The current code would treat cases 1,3 and 4 correctly but in case 2 the
format provided by the user would be ignored.

The particular piece of code was broken in commit 35c7701c
but since it was introduced a few commits before that it was never
released as working.

Advance the right pointer to actually append to the buffer. We were
lucky that all reads were completed in one try.

Libvirt didn't output feature flags for images stored on native gluster.
Fix this trivially by adding a feature formatter callback.

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1095035

Since there is code using functions from the libxml library,
libvirt_conf should have that in LIBADD so it can be linked against
even without libvirt_util (which usually deals with the error itself,
since libvirt_util has libxml in LIBADD).  The same applies to
storage_backend.c.
Signed-off-by: NMartin Kletzander <mkletzan@redhat.com>

virFileReadAll already logs an error. If reading the 'speed' file
fails with EINVAL, we log an error even though we ignore it. If it
fails with other errors, we log two errors.

Use virFileReadAllQuiet - ignore EINVAL and report just one error
in other cases.

Fixes this error on libvirtd startup:
2014-06-30 12:47:14.583+0000: 20971: error : virFileReadAll:1297 :
Failed to read file '/sys/class/net/wlan0/speed': Invalid argument

Just like virFileReadAll, but returns -errno instead
of reporting errors. Useful for ignoring some errors.

This stops the error message spam when running unprivileged
libvirtd:
2014-06-30 12:38:47.990+0000: 631: error : virPCIDeviceConfigOpen:300 :
Failed to open config space file
'/sys/bus/pci/devices/0000:00:00.0/config': Permission denied

Reported by Daniel Berrange:
https://www.redhat.com/archives/libvir-list/2014-June/msg01082.html

Remember if libvirtd is running as root or not.

Xen PV domains always have a PV console, so add one to the domain
config via post-parse callback if not explicitly specified in
the XML.  The legacy Xen driver behaves similarly, causing a
regression when switching to the new Xen toolstack.  I.e.

  virsh console pv-domain

will no longer work after upgrading a xm/xend stack to xl/libxl.

The commit caused prohibit_long_lines to fail in src/Makefile.am.

Noticed the following error when building the vbox driver
in the openSUSE build service

CCLD     vboxsnapshotxmltest
/usr/lib64/gcc/x86_64-suse-linux/4.8/../../../../x86_64-suse-linux/bin/ld:
../src/.libs/libvirt_driver_vbox_impl.a
(libvirt_driver_vbox_impl_la-vbox_snapshot_conf.o):
undefined reference to symbol 'xmlXPathRegisterNs@@LIBXML2_2.4.30'
/usr/lib64/libxml2.so: error adding symbols: DSO missing from command line
collect2: error: ld returned 1 exit status

Fixed by adding LIBXML_LIBS to libvirt_driver_vbox_impl_la_LIBADD

libxl interface for vcpu pinning is changing in Xen 4.5. Basically,
libxl_set_vcpuaffinity() now wants one more parameter. That is
representative of 'VCPU soft affinity', which libvirt does not use.

To mark such change, the macro LIBXL_HAVE_VCPUINFO_SOFT_AFFINITY is
defined. Use it as a gate and, if present, re-#define the calls from
the old to the new interface, to avoid breaking the build.
Signed-off-by: NDario Faggioli <dario.faggioli@citrix.com>
Cc: Jim Fehlig <jfehlig@suse.com>
Cc: Ian Campbell <Ian.Campbell@citrix.com>
Cc: Ian Jackson <Ian.Jackson@eu.citrix.com>

Throwing an error is much friendly than just
"error: An error occurred, but the cause is unknown"
Signed-off-by: NChen Hanxiao <chenhanxiao@cn.fujitsu.com>

Commit 55bbb011 introduced a regression
where we forgot to save the persistent domain configuration after an
external snapshot. This would make libvirt forget the snapshots and
effectively revert to the previous state in the following scenario:

1) Start VM
2) Take snapshot
3) Destroy VM
4) Restart libvirtd

Also fix spurious blank line added by patch mentioned above.

Commit 80d0918b introduced a typo in variable name:

s/failIncomaptible/failIncompatible/

Pushed under the build breaker rule.

Instead of maintaining two very similar APIs, add the "@mac" parameter
to virNetworkGetDHCPLeases and kill virNetworkGetDHCPLeasesForMAC. Both
of those functions would return data the same way, so making @mac an
optional filter simplifies a lot of stuff.

libxl does not support save, restore, or migrate on all architectures,
notably ARM.  Detect whether libxl supports these operations using
LIBXL_HAVE_NO_SUSPEND_RESUME.  If not supported, drop advertisement of
<migration_features>.

Found by Ian Campbell while improving Xen's OSSTEST infrastructure

http://lists.xen.org/archives/html/xen-devel/2014-06/msg02171.html

Since commit d86c876a we are using
guestfwd=tcp:IP:PORT,chardev=ID for guestfwd specification, however,
that has not changed in qemu, so guestfwd does not work since.

Apart from that, guestfwd is not working with older qemu that doesn't
have QEMU_CAPS_DEVICE.

Both regressions exist since late 2009 and nobody found that (until
now), so I'm only fixing the first one.

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1112066Signed-off-by: NMartin Kletzander <mkletzan@redhat.com>

The QEMU VNC client arg code has a long standing typo
of SASL_CONF_DIR when it should be SASL_CONF_PATH for
the env variable name.
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>

When creating a new disk mirror the new struct is stored in a separate
variable until everything went well. The removed hunk would actually
remove existing mirror information for example when the api would be run
if a mirror still exists.

The function headers contain type on the same line as the name. When
combined with usage of ATTRIBUTE_UNUSED, the function headers were very
long. Shorten them by breaking the line after the type.

Some of the functions in the storage driver had their headers formatted
incorrectly.

virSecurityManagerSetDiskLabel and virSecurityManagerRestoreDiskLabel
don't have complementary semantics. Document the semantics to avoid
possible problems.