LXC network devices can now be assigned a custom NIC device name on the
container side. For example, this is configured with:
<interface type='network'>
<source network='default'/>
<guest dev="eth1"/>
</interface>
In this example the network card will appear as eth1 in the guest.
https://bugzilla.redhat.com/show_bug.cgi?id=1091866
Add a new boolean 'sparse'. This will be used by the logical backend
storage driver to determine whether the target volume is sparse or not
(also known by a snapshot or thin logical volume). Although setting sparse
to true at creation could be seen as duplicitous to setting during
virStorageBackendLogicalMakeVol() in case there are ever other code paths
between Create and FindLVs that need to know about the volume be sparse.
Use the 'sparse' in a new virStorageBackendLogicalVolWipe() to decide whether
to attempt to wipe the logical volume or not. For now, I have found no
means to wipe the volume without writing to it. Writing to the sparse
volume causes it to be filled. A sparse logical volume is not completely
writeable as there exists metadata which if overwritten will cause the
sparse lv to go INACTIVE which means pool-refresh will not find it.
Access to whatever lvm uses to manage data blocks is not provided by
any API I could find.
Commit 93e82727 introduced numatune_conf.h file that contains
typedefs already defined in domain_conf.h, such as:
- virDomainNumatune
- virDomainNumatunePtr
- virDomainDef
- virDomainDefPtr
As numatune_conf.h is included by domain_conf.h, clang
complains about redefinition of typedef and the build fails.
In order to fix it, drop typedefs already defined by numatume_conf.h
from domain_conf.h.
Coverity complains about the return value of ioctl not being checked.
Even though we carry on when this fails (just like qemu-img does),
we can log an error.
For non-local storage drivers we can't expect to use the "scrub" tool to
wipe the volume. Split the code into a separate backend function so that
we can add protocol specific code later.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1118710
The next patch will move the storage volume wiping code into the
individual backends. This patch splits out the common code to wipe a
local volume into a separate backend helper so that the next patch is
simpler.
When domain is started with numatune memory mode strict and the
nodeset does not include host NUMA node with DMA and DMA32 zones, KVM
initialization fails. This is because cgroup restrict even kernel
allocations. We are already doing numa_set_membind() which does the
same thing, only it does not restrict kernel allocations.
This patch leaves the userspace numa_set_membind() in place and moves
the cpuset.mems setting after the point where monitor comes up, but
before vcpu and emulator sub-groups are created.
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
Currently, we only bind the whole QEMU domain to memory nodes
specified in nodemask altogether. That, however, doesn't make much
sense when one wants to control from where the memory for particular
guest nodes should be allocated. QEMU allows us to do that by
specifying 'host-nodes' parameter for the 'memory-backend-ram' object,
so let's use that.
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
When qemu switched to using OptsVisitor for -numa parameter, it did
two things in the same patch. One of them is that the numa parameter
is now visible in "query-command-line-options", the second one is that
it enabled using disjoint cpu ranges for -numa specification. This
will be used in later patch.
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
The numa patch series in qemu adds "memory-backend-ram" object type by
which we can tell whether we can use such objects.
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
That can be lately achieved with by having .param == NULL in the
virQEMUCapsCommandLineProps struct.
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
There were numerous places where numatune configuration (and thus
domain config as well) was changed in different ways. On some
places this even resulted in persistent domain definition not to be
stable (it would change with daemon's restart).
In order to uniformly change how numatune config is dealt with, all
the internals are now accessible directly only in numatune_conf.c and
outside this file accessors must be used.
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
Since there was already public virDomainNumatune*, I changed the
private virNumaTune to match the same, so all the uses are unified and
public API is kept:
s/vir\(Domain\)\?Numa[tT]une/virDomainNumatune/g
then shrunk long lines, and mainly functions, that were created after
that:
sed -i 's/virDomainNumatuneMemPlacementMode/virDomainNumatunePlacement/g'
And to cope with the enum name, I haad to change the constants as
well:
s/VIR_NUMA_TUNE_MEM_PLACEMENT_MODE/VIR_DOMAIN_NUMATUNE_PLACEMENT/g
Last thing I did was at least a little shortening of already long
name:
s/virDomainNumatuneDef/virDomainNumatune/g
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
There are many places with numatune-related code that should be put
into special numatune_conf and this patch creates a basis for that.
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
In XML format, by definition, order of fields should not matter, so
order of parsing the elements doesn't affect the end result. When
specifying guest NUMA cells, we depend only on the order of the 'cell'
elements. With this patch all older domain XMLs are parsed as before,
but with the 'id' attribute they are parsed and formatted according to
that field. This will be useful when we have tuning settings for
particular guest NUMA node.
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
Excerpt from the virCommandAddArgBuffer() description: "Correctly
transfers memory errors or contents from buf to cmd."
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
This patch adds support for the QEMU vhost-user feature to libvirt.
vhost-user enables the communication between a QEMU virtual machine
and other userspace process using the Virtio transport protocol.
It uses a char dev (e.g. Unix socket) for the control plane,
while the data plane based on shared memory.
The XML looks like:
<interface type='vhostuser'>
<mac address='52:54:00:3b:83:1a'/>
<source type='unix' path='/tmp/vhost.sock' mode='server'/>
<model type='virtio'/>
</interface>
Signed-off-by: Michele Paolino <m.paolino@virtualopensystems.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
https://bugzilla.redhat.com/show_bug.cgi?id=1119173 documents that
commit eaba79d was flawed in the implementation of the
VIR_DOMAIN_BLOCK_JOB_ABORT_ASYNC flag when it comes to completing
a blockcopy. Basically, the qemu pivot action is async (the QMP
command returns immediately, but the user must wait for the
BLOCK_JOB_COMPLETE event to know that all I/O related to the job
has finally been flushed), but the libvirt command was documented
as synchronous by default. As active block commit will also be
using this code, it is worth fixing now.
* src/qemu/qemu_driver.c (qemuDomainBlockJobImpl): Don't skip wait
loop after pivot.
Signed-off-by: Eric Blake <eblake@redhat.com>
Now that we've finally fixed all the violators, it's time to
enforce that any pointer to a const object is never freed (it
is aliasing some other memory, where the non-const original
should be freed instead). Alas, the code still needs a normal
vs. Coverity version, but at least we are still guaranteeing
that the macro call evaluates its argument exactly once.
I verified that we still get the following compiler warnings,
which in turn halts the build thanks to -Werror on gcc (hmm,
gcc 4.8.3's placement of the ^ for ?: type mismatch is a bit
off, but that's not our problem):
int oops1 = 0;
VIR_FREE(oops1);
const char *oops2 = NULL;
VIR_FREE(oops2);
struct blah { int dummy; } oops3;
VIR_FREE(oops3);
util/virauthconfig.c:159:35: error: pointer/integer type mismatch in conditional expression [-Werror]
VIR_FREE(oops1);
^
util/virauthconfig.c:161:5: error: passing argument 1 of 'virFree' discards 'const' qualifier from pointer target type [-Werror]
VIR_FREE(oops2);
^
In file included from util/virauthconfig.c:28:0:
util/viralloc.h:79:6: note: expected 'void *' but argument is of type 'const void *'
void virFree(void *ptrptr) ATTRIBUTE_NONNULL(1);
^
util/virauthconfig.c:163:35: error: type mismatch in conditional expression
VIR_FREE(oops3);
^
* src/util/viralloc.h (VIR_FREE): No longer cast away const.
* src/xenapi/xenapi_utils.c (xenSessionFree): Work around bogus
header.
Signed-off-by: Eric Blake <eblake@redhat.com>
Add 'nocow' to storage volume xml so that user can have an option
to set NOCOW flag to the newly created volume. It's useful on btrfs
file system to enhance performance.
Btrfs has low performance when hosting VM images, even more when the guest
in those VM are also using btrfs as file system. One way to mitigate this
bad performance is to turn off COW attributes on VM files. Generally, there
are two ways to turn off COW on btrfs: a) by mounting fs with nodatacow,
then all newly created files will be NOCOW. b) per file. Add the NOCOW file
attribute. It could only be done to empty or new files.
This patch tries the second way, according to 'nocow' option, it could set
NOCOW flag per file:
for raw file images, handle 'nocow' in libvirt code; for non-raw file images,
pass 'nocow=on' option to qemu-img, and let qemu-img to handle that (requires
qemu-img version >= 2.1).
Signed-off-by: Chunyan Liu <cyliu@suse.com>
In many places we define a variable as a 'const char *' when in fact
we modify it just a few lines below. Or even free it. We should not do
that.
There's one exception though, in xenSessionFree() xenapi_utils.c. We
are freeing the xen_session structure which is defined in
xen/api/xen_common.h public header. The structure contains session_id
which is type of 'const char *' when in fact it should have been just
'char *'. So I'm leaving this unmodified, just noticing the fact in
comment.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
When the backing store of a volume wasn't accessible while updating the
volume definition the call would fail altogether. In cases where we
currently (incorrectly) treat remote backing stores as local one this
might lead to strange errors.
Ignore the opening errors until we figure out how to track proper volume
metadata.
Use the backing store parser to properly create the information about a
volume's backing store. Unfortunately as the storage driver isn't
prepared to allow volumes backed by networked filesystems add a
workaround that will avoid changing the XML output.
Rework the apparmor lxc profile abstraction to mimic ubuntu's container-default.
This profile allows quite a lot, but strives to restrict access to
dangerous resources.
Removing the explicit authorizations to bash, systemd and cron files,
forces them to keep the lxc profile for all applications inside the
container. PUx permissions where leading to running systemd (and others
tasks) unconfined.
Put the generic files, network and capabilities restrictions directly
in the TEMPLATE.lxc: this way, users can restrict them on a per
container basis.
Rename linuxDomainInterfaceStats to virNetInterfaceStats in order
to allow adding platform specific implementations without
making consumer worrying about specific implementation to be used.
Also, rename util/virstatslinux.c to util/virstats.c so placing
other platform specific implementations into this file don't
look unexpected from the file name.
Code logic in libxlDomainAttachDeviceFlags and libxlDomainDetachDeviceFlags
is wrong with return value in error cases.
'ret' was being set to 0 if 'flags & VIR_DOMAIN_DEVICE_MODIFY_CONFIG' was
false. Then if something like virDomainDeviceDefParse() failed in the
VIR_DOMAIN_DEVICE_MODIFY_LIVE logic, the error would be reported but the
function would return success.
Signed-off-by: Chunyan Liu <cyliu@suse.com>
4cc1f1a01fb338de939ba88eb933931687b22336 introduced a crash when doing a
block copy as virStorageSourceInitChainElement was called on
"disk->mirror" that is still NULL at that point instead of "mirror"
which temporarily holds the mirror source struct until it's fully
initialized. This resulted into a crash as a NULL was dereferenced.
Reported by: Shanzi Yu <shyu@redhat.com>
Commit id '3ea661de' refactored the code to use the 'disk->src->path'
instead of getting the path from virDomainDiskGetSource(). The one
call to qemuOpenFile() didn't use the disk source path, rather it used
the path as passed from the caller (in this case 'vda') - this caused
a failure with the virt-test/tp-libvirt as follows:
$ virsh domblkinfo virt-tests-vm1 vda
error: cannot stat file '/home/virt-test/shared/data/images/jeos-20-64.qcow2': Bad file descriptor
$
If the openvswitch service is stopped, and is followed by destroying a
VM, the openvswitch bridge translates into a state where it doesn't
recover the port configuration. While it successfully fetches data
from the internal DB, since the corresponding virtual interface does
not exists anymore the whole recovery process fails leaving restarted
VM with inability to connect to the bridge. The following set of
commands will trigger the problem:
virsh start vm
service openvswitch-switch stop
virsh destroy vm
service openvswitch-switch start
virsh start vm
Signed-off-by: Chunhe Li <lichunhe@huawei.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Instead of allocating the virSecurityLabelDef structure ourselves, we
can utilize virSecurityLabelDefNew which even sets the default values
for us.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
