This new module holds and formats capabilities for emulator. If you
are about to create a new domain, you may want to know what is the
host or hypervisor capable of. To make sure we don't regress on the
XML, the formatting is not something left for each driver to
implement, rather there's general format function.

The domain capabilities is a lockable object (even though the locking
is not necessary yet) which uses reference counter.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

In the lastest rework (9e7ecabf) a cleanup label was left over which
results in compilation error.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

The functions called here report an OOM error when the allocation
fails, or quietly return -1 on wrong usage (which is not the case
here)

They report errors in all other cases.

It sets the errno on all other errors, do it here too.
Also report an error.

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The comments for lxcDomainCreateXMLWithFiles are out of date.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>

By default, the bus type is inferred from the style of the device
name('target' in this command), e.g. a device named 'sda' will
typically be exported using a SCSI bus. Actually, not only SCSI bus,
but USB/SATA bus also use this kind of device name. So add '--bus'
option for attach-disk command to allow user specify the target bus.
Signed-off-by: NYanbing Du <ydu@redhat.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>

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>

In the test, the snapshot XML is written into a file that's located
under:

  abs_srcdir/vboxsnapshotxmldata/testResult.vbox

However, the abs_srcdir doesn't have to be necessarily writable. It
should have been abs_builddir instead. Moreover, the label in the func
creating the file is called 'fail' while it fulfils the duty of
'cleanup' label.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

At the very beginning of the test we check if the underlying
filesystem supports extended attributes as they are used to store fake
SELinux labels. In order to check that, a dummy file is created and
semi-random attribute is set. However, the file is created under:

  abs_srcdir "/securityselinuxlabeldata/testxattr"

which has two problems: abs_srcdir is not required to be writable, so
it should have been abs_builddir. The second one is - there's no
"securityselinuxlabeldata" folder under abs_builddir. The problem was
introduced in caf164f1.
Signed-off-by: NMichal Privoznik <mprivozn@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.