Implementation of iolimits for the qemu driver with
capability probing for block size attribute and
command line generation for block sizes.
Including testcase for qemuxml2argvtest.
Signed-off-by: Viktor Mihajlovski <mihajlov@linux.vnet.ibm.com>
Introducing a new iolimits element allowing to override certain
properties of a guest block device like the physical and logical
block size.
This can be useful for platforms with 'non-standard' disk formats
like S390 DASD with its 4K block size.
Signed-off-by: Viktor Mihajlovski <mihajlov@linux.vnet.ibm.com>
Without this patch, logged command executions can be ambiguous if
the command contained any shell metacharacters. This has caused
more than one person to attempt to patch clients to add unnecessary
quoting, without realizing that the command itself was run with
correct args, and only the logged output was ambiguous.
* src/util/command.c (virCommandToString): Add shell escapes.
* tests/commandtest.c (test16): Test new behavior.
* tests/commanddata/test16.log: Update expected output.
* tests/qemuxml2argvdata/qemuxml2argv-*.args: Likewise.
* tests/networkxml2argvdata/*.argv: Likewise.
After fixing the last review comments on remote port searching (commit
a14b4aea51), the commit right after that
wasn't modified accordingly, therefore two values weren't changed as
they should and the configurable ports don't work as expected.
This simple commit changes last two values missed and fixes the issue.
The codes were updated to allow to reset the device as long as
there is no devices/functions behind the same bus. However, the
comments were kept without touched.
To avoid backward compatibility issues, this patch suppresses
auto-generated DAC labels from XML. This change affects commands such as
dumpxml and save.
Signed-off-by: Marcelo Cerri <mhcerri@linux.vnet.ibm.com>
With this patch libvirt tries to assign a model to a single seclabel
when model is missing. Libvirt will look up at host's capabilities and
assign the first model to seclabel.
This patch fixes:
1. The problem with existing guests that have a seclabel defined in its XML.
2. A XML parse error when a guest is restored.
Signed-off-by: Marcelo Cerri <mhcerri@linux.vnet.ibm.com>
When domain XML contains any of the elements for setting up CPU
scheduling parameters (period, quota, emulator_period, or
emulator_quota) we need cpu cgroup to enforce the configuration.
However, the existing code would just ignore silently such settings if
either cgroups were not available at all cpu cgroup was not available.
Moreover, APIs for manipulating CPU scheduler parameters were already
failing if cpu cgroup was not available. This patch makes cpu cgroup
mandatory for all domains that use CPU scheduling elements in their XML.
The variable max_id is initialized again in the step of
getting cpu mapping variable map2. But in the next for loop
we still expect original value of max_id, the bug will
crash libvirtd when using on NUMA machine with big number
of cpus.
On NUMA machine, the length of string got from file
cpuacct.usage_percpu is quite large, so expand the
limit of 1024 bytes.
errors like:
Failed to read file \
'/cgroup/cpuacct/libvirt/qemu/rhel6q/cpuacct.usage_percpu': \
Value too large for defined data type
Some DHCP servers send their DHCP replies to the broadcast MAC address
rather than to the MAC address of the VM. The existing DHCP snooping
code assumes that the reply always goes to the MAC address of the VM
thus filtering the traffic of some DHCP servers' replies.
The below patch adapts the code to
1) filter DHCP replies by comparing the MAC address in the reply against
the MAC address of the VM (held in the snoop request)
2) adapts the pcap filter for traffic towards the VM to accept DHCP replies
sent to any MAC address; for further filtering we rely on 1)
3) creates initial rules that are active while waiting for DHCP replies;
these rules now accept DHCP replies to the VM's MAC address or to the
MAC broadcast address
The introduction of the new VLAN code, along with the fix
from 5e465df6be, caused the
addition of OVS ports to fail with the following message:
ovs-vsctl: 00002|vsctl|ERR|: missing column name
This fix takes into account the VLAN arguments are optional,
and correctly sets up the command line to run the "ovs-vsctl"
command to add ports to the OVS bridge.
Signed-off-by: Kyle Mestery <kmestery@cisco.com>
CC: Eric Blake <eblake@redhat.com>
If a 8021.Qbh network device supports SRIOV and its VF is being used
in pci passthrough mode, when the guest is shutdown or destroyed, the
PF inteface is also brought down. qemuDomainHostdevNetConfigRestore()
finds out the PF for provided hostdev (which is VF) and passes it to
virNetDevPortProfileDisassociate() as linkdev. Later, linkdev gets passed
to virNetDevSetOnline() where the interface is brought down by clearing
IFF_UP flag.
Bringing down a PF, when only VF is being brought down is not expected
behavior. This patch adds a check so that virNetDevSetOnline() is called
only for PF and not if device is a VF.
Signed-off-by: Nishank Trivedi <nistrive@cisco.com>
The loop processing the trusted DHCP server generated one too
many rules and added one final rules that accepted responses
from all DHCP servers. Below patch fixes this.
virDomainVcpuPinAdd does a realloc on vcpupin_list if the new vcpu pin
definition doesn't fit into the array. The list is an array of pointers
but the function definition didn't support returning the changed pointer
to the caller if it was realloced. This caused segfaults if realloc
would change the base pointer.
virDomainVcpuPinDefCopy when the control flow reaches out of memory
cleanup code, the flow would end in a infinite loop as the loop variable
wasn't decremented.
Also a dereference of NULL pointers was possible if allocation of the
Vcpu pinning definiton structure failed.
Commit d0c0e79ac6 left behind some dead
code (hasDAC can't be efectively set to true, because
virSecurityManagerNew fails to load the "dac" driver).
This patch also enhances the condition for adding the default
auto-detected security manager if the manager array is allocated but
empty.
Also the configuration file for qemu driver still contains reference to
the DAC driver that can't be enabled manualy.
Before commit 05447e3af4, qemuAgentCommand
blocked until it got a reply or appropriate event. When new parameter
was added to qemuAgentCommand in the above commit, all existing callers
of it were updated in a wrong way changing them from blocking to
5-seconds timeout.
This bug was revealed by the crash described in
https://bugzilla.redhat.com/show_bug.cgi?id=852383
The vlan info pointer sent to virNetDevOpenvswitchAddPort should never
be non-NULL unless there is at least one tag. The factthat such a vlan
info pointer was receveid pointed out that a caller was passing the
wrong pointer. Instead of sending &net->vlan, the result of
virDomainNetGetActualVlan(net) should be sent - that function will
look for vlan info in net->data.network.actual->vlan, and in cany case
return NULL instead of a pointer if the vlan info it finds has no
tags.
Aside from causing the crash, sending a hardcoded &net->vlan has the
effect of ignoring vlan info from a <network> or <portgroup> config.
Fixup buffer usage when handling VLANs. Also fix the logic
used to determine if the virNetDevVlanPtr is valid or not.
Fixes crashes in the latest code when using Open vSwitch
virtualports.
Signed-off-by: Kyle Mestery <kmestery@cisco.com>
If no 'security_driver' config option was set, then the code
just loaded the 'dac' security driver. This is a regression
on previous behaviour, where we would probe for a possible
security driver. ie default to SELinux if available.
This changes things so that it 'security_driver' is not set,
we once again do probing. For simplicity we also always
create the stack driver, even if there is only one driver
active.
The desired semantics are:
- security_driver not set
-> probe for selinux/apparmour/nop
-> auto-add DAC driver
- security_driver set to a string
-> add that one driver
-> auto-add DAC driver
- security_driver set to a list
-> add all drivers in list
-> auto-add DAC driver
It is not allowed, or possible to specify 'dac' in the
security_driver config param, since that is always
enabled.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
The security driver loading code in qemu has a flaw that causes it to
register the DAC security driver twice. This causes problems (machines
unable to start) as the two DAC drivers clash together.
This patch refactors the code to allow loading the DAC driver even if
its specified in configuration (it can't be registered as a common
security driver), and does not add the driver twice.
This reverts commit 9f9b7b85c9.
The DAC security driver needs special handling and extra parameters and
can't just be added to regular security drivers.
If cgroups are enabled in general but cpu cgroup is disabled in
qemu.conf or not mounted at all, libvirt would refuse to start any
domain even though scheduler parameters are not set in domain XML.
This patch makes cpu cgroup mandatory only for domains that actually
want to use it.
* src/util/virnetdevopenvswitch.c (virNetDevOpenvswitchAddPort): avoid libvirtd
crash due to derefing a NULL virtVlan->tag.
RHBZ: https://bugzilla.redhat.com/show_bug.cgi?id=852383
Signed-off-by: Alex Jia <ajia@redhat.com>
When starting a machine the DAC security driver tries to set the UID and
GID of the newly spawned process. This worked as desired if the desired
label was set. When the label was missing a logical bug in
virSecurityDACGenLabel() caused that uninitialised values were used as
uid and gid for the new process.
With this patch, default values (from qemu driver configuration)
are used if the label is not found.
getpwuid_r returns success but sets the return structure to NULL when it
fails to deliver data about the requested uid. In our helper code this
created following strange error messages:
" ... cannot getpwuid_r(1234): Success"
This patch creates a more helpful message:
" ... getpwuid_r failed to retrieve data for uid '1234'"
Previous commit 0b4b53bb80 defined 'inline' to prevent broken build on
systems with libnl1 headers. However, it broke build on systems with
libnl3 headers. Therefore we must make that fix conditional.
Ubuntu 10.04 shipped with out-of-the-box libnl1 headers, which
assumed the old gcc semantics of 'extern inline' as a C89 extension:
the function will _always_ be inline if it is used, and that
it may be declared extern inline in headers without a definition,
as long as the definition occurs before any use. But when C99
added 'extern inline' as a mandatory feature of the language, with
slightly different semantics than gcc (the function MUST have
external linkage, and the inline definition MUST be present
alongside any declaration, where the compiler can then choose
which of the two versions to use), this rendered the use of
'inline' in libnl's header obsolete. Most distros already solved
this by removing 'inline' (the resulting 'extern' is correct,
regardless of gcc semantics), and libnl-3 does not have the
problem (where it has switched to 'static inline' instead, again
with the definition present, and again, our hack will result in
plain 'static' with no ill effects). But for the case of building
out of the box, we hack around the broken Ubuntu header.
* src/util/virnetlink.h: Work around libnl issue.
With current flow in qemudDomainDefine we might lose data
when updating an existing domain. We parse given XML and
overwrite the configuration. Then we try to save the new
config. However, this step may fail and we don't perform any
roll back. In fact, we remove the domain from the list of
domains held up by qemu driver. This is okay as long as the
domain was brand new one.
Currently, when guest agent is configured but not responsive
(e.g. due to appropriate service not running in the guest)
we return VIR_ERR_INTERNAL_ERROR. Both are wrong. Therefore
we need to introduce new error code to reflect this case.
When checking for seclabels without security models, def->nseclabels is
already set to n. In the case of an error def->seclabels is freed but
nseclabels is left untouched. This leads to a segmentation fault when
def is freed in virDomainDefParseXML.
With the latest patches libvirt supports qemu agent monitor
passthrough. However, function in qemu driver is called
qemuDrvDomainAgentCommand. s/Drv// as used in all other names.
In my quest for reusing variables I failed to edit one variable when
fixing details between two patch versions. That results in a failure
to start qemu with autoport and spice tls, because qemu is trying to
bind two sockets to the same port.
Commit 4b03d59167 changed the pinning
behavior in a way that makes some machines non-startable.
The comment mentioning that we cannot control each vcpu when there is
not VCPU<-> PID mapping available is true, however, this isn't
necessarily an error, because this can be caused by old QEMU without
support for "query-cpus" command as well as a software emulated
machines that don't create more than one process.
When libvirt_lxc is built, it uses the utility library and #includes
virnetdev.h, which #includes virnetlink.h, which includes
<netlink/msg.h>.
Normally, the netlink include directory would be just off
/usr/include, so that wouldn't create a problem, but on Fedora and
RHEL systems using libnl3, the libnl includes have been moved into
/usr/include/libnl3 (to allow concurrent installation of libnl-1.1).
All other binaries that need it have added $(LIBNL_CFLAGS) to their
CFLAGS, but not libvirt_lxc, so it fails to build on Fedora and RHEL
that have only libnl3-devel installed. This was previously unnoticed
because everyone was building with libnl headers in
/usr/include/netlink (even on systems with the headers in
/usr/include/libnl3/netlink, many people (like me) usually also have
the libnl1.1 headers in /usr/include/netlink).
This patch adds the necessary CFLAGS for libvirt_lxc.
Note that we don't need to add $(LIBNL_LIBS) to the LDADD for this
binary, because it never directly calls libnl functions, but only
calls them indirectly through the util library, which it's already
linking against.
The name 'virDomainDiskSnapshot' didn't fit in with our normal
conventions of using a prefix hinting that it is related to a
virDomainSnapshotPtr. Also, a future patch will reuse the
enum for declaring where the VM memory is stored.
* src/conf/snapshot_conf.h (virDomainDiskSnapshot): Rename...
(virDomainSnapshotLocation): ...to this.
(_virDomainSnapshotDiskDef): Update clients.
* src/conf/domain_conf.h (_virDomainDiskDef): Likewise.
* src/libvirt_private.syms (domain_conf.h): Likewise.
* src/conf/domain_conf.c (virDomainDiskDefParseXML)
(virDomainDiskDefFormat): Likewise.
* src/conf/snapshot_conf.c: (virDomainSnapshotDiskDefParseXML)
(virDomainSnapshotAlignDisks, virDomainSnapshotDefFormat):
Likewise.
* src/qemu/qemu_driver.c (qemuDomainSnapshotDiskPrepare)
(qemuDomainSnapshotCreateSingleDiskActive)
(qemuDomainSnapshotCreateDiskActive, qemuDomainSnapshotCreateXML):
Likewise.
This has several benefits:
1. Future snapshot-related code has a definite place to go (and I
_will_ be adding some)
2. Snapshot errors now use the VIR_FROM_DOMAIN_SNAPSHOT error
classification, which has been underutilized (previously only in
libvirt.c)
* src/conf/domain_conf.h, domain_conf.c: Split...
* src/conf/snapshot_conf.h, snapshot_conf.c: ...into new files.
* src/Makefile.am (DOMAIN_CONF_SOURCES): Build new files.
* po/POTFILES.in: Mark new file for translation.
* src/vbox/vbox_tmpl.c: Update caller.
* src/esx/esx_driver.c: Likewise.
* src/qemu/qemu_command.c: Likewise.
* src/qemu/qemu_domain.h: Likewise.
We were failing to react to allocation failure when initializing
a snapshot object list. Changing things to store a pointer
instead of a complete object adds one more possible point of
allocation failure, but at the same time, will make it easier to
react to failure now, as well as making it easier for a future
patch to split all virDomainSnapshotPtr handling into a separate
file, as I continue to add even more snapshot code.
Luckily, there was only one client outside of domain_conf.c that
was actually peeking inside the object, and a new wrapper function
was easy.
* src/conf/domain_conf.h (_virDomainObj): Use a pointer.
(virDomainSnapshotObjListInit): Rename.
(virDomainSnapshotObjListFree, virDomainSnapshotForEach): New
declarations.
(_virDomainSnapshotObjList): Move definitions...
* src/conf/domain_conf.c: ...here.
(virDomainSnapshotObjListInit, virDomainSnapshotObjListDeinit):
Rename...
(virDomainSnapshotObjListNew, virDomainSnapshotObjListFree): ...to
these.
(virDomainSnapshotForEach): New function.
(virDomainObjDispose, virDomainListPopulate): Adjust callers.
* src/qemu/qemu_domain.c (qemuDomainSnapshotDiscard)
(qemuDomainSnapshotDiscardAllMetadata): Likewise.
* src/qemu/qemu_migration.c (qemuMigrationIsAllowed): Likewise.
* src/qemu/qemu_driver.c (qemuDomainSnapshotLoad)
(qemuDomainUndefineFlags, qemuDomainSnapshotCreateXML)
(qemuDomainSnapshotListNames, qemuDomainSnapshotNum)
(qemuDomainListAllSnapshots)
(qemuDomainSnapshotListChildrenNames)
(qemuDomainSnapshotNumChildren)
(qemuDomainSnapshotListAllChildren)
(qemuDomainSnapshotLookupByName, qemuDomainSnapshotGetParent)
(qemuDomainSnapshotGetXMLDesc, qemuDomainSnapshotIsCurrent)
(qemuDomainSnapshotHasMetadata, qemuDomainRevertToSnapshot)
(qemuDomainSnapshotDelete): Likewise.
* src/libvirt_private.syms (domain_conf.h): Export new function.
When the XenStore tdb lives persistently and is not cleared between host
reboots, Xend (version 3.4 and 4.1) re-creates the domain information
located in XenStore below /vm/$UUID. (According to the xen-3.2-commit
hg265950e3df69 to fix a problem when locally migrating a domain to the
host itself.)
When doing so a version number is added to the UUID separated by one
dash, which confuses xenStoreDomainIntroduced(): It iterates over all
domains and tries to lookup all inactive domains using
xenStoreDomainGetUUID(), which fails if the running domain is renamed:
virUUIDParse() fails to parse the versioned UUID and the domain is
flagged as missing. When this happens the function delays .2s and
re-tries 20 times again, multiplied by the number of renamed VMs.
14:48:38.878: 4285: debug : xenStoreDomainIntroduced:1354 : Some domains were missing, trying again
This adds a significant delay:
# time virsh list >/dev/null
real 0m6.529s
# xenstore-list /vm
00000000-0000-0000-0000-000000000000
00000000-0000-0000-0000-000000000000-1
00000000-0000-0000-0000-000000000000-2
00000000-0000-0000-0000-000000000000-3
00000000-0000-0000-0000-000000000000-4
00000000-0000-0000-0000-000000000000-5
7c06121e-90c3-93d4-0126-50481d485cca
00000000-0000-0000-0000-000000000000-6
00000000-0000-0000-0000-000000000000-7
144ad19d-dfb4-2f80-8045-09196bb8784f
00000000-0000-0000-0000-000000000000-8
144ad19d-dfb4-2f80-8045-09196bb8784f-1
00000000-0000-0000-0000-000000000000-9
00000000-0000-0000-0000-000000000000-10
00000000-0000-0000-0000-000000000000-11
00000000-0000-0000-0000-000000000000-12
00000000-0000-0000-0000-000000000000-13
00000000-0000-0000-0000-000000000000-14
144ad19d-dfb4-2f80-8045-09196bb8784f-2
00000000-0000-0000-0000-000000000000-15
144ad19d-dfb4-2f80-8045-09196bb8784f-3
00000000-0000-0000-0000-000000000000-16
The patch adds truncation of the UUID as read from the XenStore path
before passing it to virUUIDParse().
The same issue is reported at
<http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=666135>
Signed-off-by: Philipp Hahn <hahn@univention.de>
Currently, if users set 'security_driver="dac"' in qemu.conf libvirtd
fails to initialize as DAC driver is not found because it is missing
in our security drivers array.
The original patch to support firewalld in nwfilter wasn't personally
checking the exit status of firewall-cmd, but was instead sending NULL
in the *exitstatus arg, which meant that virCommandWait would log an
error just for the exit status being non-0 (and a "more scary than
useful" error at that).
We don't want to treat this as an error, though, just as a reason to
use standard (ip|eb)tables commands instead of firewall-cmd.
This patch modifies the virCommandRun in the nwfilter code to request
status back from the caller. This avoids virCommandWait logging an
error message, and allows the caller to do as it likes after examining
the status.
The VIR_DEBUG() logged when firewalld is enabled has also been
reworded and changed to a VIR_INFO, and a similar VIR_INFO has been
added in the case that firewalld is *not* found+enabled.
I noticed this while auditing all calls to virCommandRun that request
an exit status from virCommandRun. Two functions in the openvz driver
openvzDomainGetBarrierLimit
openvzDomainSetBarrierLimit
request an exit status from virCommandRun (thus assuring that
virCommandRun won't log any errors just due to a non-0 exit status),
but then fail to examine that exit status. This could result in the
functions believing that the call to "vzlist" was successful, even
though it may have encountered an error.
The recent virDomainQemuAgentCommand addition is part of 0.10.0;
also, grouping all libvirt-qemu.so callbacks together makes them
easier to identify.
* src/libvirt_qemu.syms: Fix release symbol.
* src/qemu/qemu_driver.c (qemuDriver): Likewise.
* src/remote/remote_driver.c (remote_driver): Likewise.
* src/driver.h (_virDriver): Group qemu-specific callbacks.
libvirt's network config documents that a bridge's STP "forward delay"
(called "delay" in the XML) should be specified in seconds, but
virNetDevBridgeSetSTPDelay() assumes that it is given a delay in
milliseconds (although the comment at the top of the function
incorrectly says "seconds".
This fixes the comment, and converts the delay to milliseconds before
calling virNetDevBridgeSetSTPDelay().
If a domain is pmsuspended then virsh suspend will succeed. Beside
obvious flaw, virsh resume will report success and change domain
state to running which is another mistake. Therefore we must forbid
any attempts for suspend and resume when pmsuspended.
Add qemuDomainAgentCommand() which is generated automatically,
for .qemuDomainArbitraryAgentCommand to remote driver.
Signed-off-by: MATSUDA Daiki <matsudadik@intellilink.co.jp>
Add @seconds variable to qemuAgentSend().
When @timemout is true, @seconds controls how long to wait for a
response (if @seconds is VIR_DOMAIN_QEMU_AGENT_COMMAND_DEFAULT,
default to QEMU_AGENT_WAIT_TIME).
In addition, @seconds must be >= 0 or VIR_DOMAIN_QEMU_AGENT_COMMAND_DEFAULT.
If @timeout is false, @seconds is ignored.
Signed-off-by: MATSUDA Daiki <matsudadik@intellilink.co.jp>
Several VIR_DEBUG()'s were changed to VIR_WARN() while I was testing
the firewalld support patch, and I neglected to change them back
before I pushed.
In the meantime I've decided that it would be useful to have them be
VIR_INFO(), just so there will be logged evidence of which method is
being used (firewall-cmd vs. (eb|ip)tables) without needing to crank
logging to 11. (at most this adds 2 lines to libvirtd's logs per
libvirtd start).
dnsmasq is forwarding a number of queries upstream that should not
be done. There still remains an MX query for a plain name with no
domain specified that will be forwarded is dnsmasq has --domain=xxx
--local=/xxx/ specified. This does not happen with no domain name
and --local=// ... not a libvirt problem.
BTW, thanks again to Claudio Bley!
The bandwidth units for blockpull and blockcopy are in Megabytes per
Second, not Megabits per Second.
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
The virNetlinkEventAddClient / virNetlinkEventRemoveClient stub
impls had syntax errors in their parameter lists, using a ')'
after the second-to-last parameter instead of a ','
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
This patch introduce virNetlinkEventServiceStopAll() to stop
all the monitors to receive netlink messages for libvirtd.
Signed-off-by: Tang Chen <tangchen@cn.fujitsu.com>
This patch improve all the API in virnetlink.c to support
all kinds of netlink protocols, and make all netlink sockets
be able to join in groups.
Signed-off-by: Tang Chen <tangchen@cn.fujitsu.com>
Unfortunately libssh2 doesn't support all types of host keys that can be
saved in the known_hosts file. Also it does not report that parsing of
the file failed. This results into truncated known_hosts files where the
standard client stores keys also in other formats (eg.
ecdsa-sha2-nistp256).
This patch changes the default location of the known_hosts file into the
libvirt private configuration directory, where it will be only written
by the libssh2 layer itself. This prevents trashing user's known_host
file.
The libssh2 code wasn't supposed to create the known_hosts file, but
recent findings show, that we can't use the default created by OpenSSH
as libssh2 might damage it. We need to create a private known_hosts file
in the config path.
This patch adds support for skipping error if the known_hosts file is
not present and let libssh2 create a new one.
This patch introduces support of setting emulator's period and
quota to limit cpu bandwidth when the vm starts. Also updates
XML Schema for new entries and docs.
This patch changes the behaviour of xml element cputune.period
and cputune.quota to limit cpu bandwidth only for vcpus, and no
longer limit cpu bandwidth for the whole guest.
The reasons to do this are:
- This matches docs of cputune.period and cputune.quota.
- The other parts excepting vcpus are treated as "emulator",
and there are separate period/quota settings for emulator
in the subsequent patches
Introduce 2 APIs to support emulator threads in remote driver.
1) remoteDomainPinEmulator: call driver api, such as qemudDomainPinEmulator.
2) remoteDomainGetEmulatorPinInfo: call driver api, such as qemudDomainGetEmulatorPinInfo.
They are similar to remoteDomainPinVcpuFlags and remoteDomainGetVcpuPinInfo.
Signed-off-by: Tang Chen <tangchen@cn.fujitsu.com>
Signed-off-by: Hu Tao <hutao@cn.fujitsu.com>
Introduce 2 APIs to support emulator threads pin in qemu driver.
1) qemudDomainPinEmulator: setup emulator threads pin info.
2) qemudDomainGetEmulatorPinInfo: get all emulator threads pin info.
They are similar to qemudDomainPinVcpuFlags and qemudDomainGetVcpuPinInfo.
And also, remoteDispatchDomainPinEmulatorFlags and remoteDispatchDomainGetEmulatorPinInfo
functions are introduced.
Signed-off-by: Tang Chen <tangchen@cn.fujitsu.com>
Signed-off-by: Hu Tao <hutao@cn.fujitsu.com>
Introduce 2 APIs to support emulator threads pin.
1) virDomainEmulatorPinAdd: setup emulator threads pin with a given cpumap string.
2) virDomainEmulatorPinDel: remove all emulator threads pin.
Signed-off-by: Tang Chen <tangchen@cn.fujitsu.com>
Signed-off-by: Hu Tao <hutao@cn.fujitsu.com>
Introduce 2 APIs to set/get physical cpu pinning info of emulator threads.
Signed-off-by: Tang Chen <tangchen@cn.fujitsu.com>
Signed-off-by: Hu Tao <hutao@cn.fujitsu.com>
Emulator threads should also be pinned by sched_setaffinity(), just
the same as vcpu threads.
Signed-off-by: Tang Chen <tangchen@cn.fujitsu.com>
Signed-off-by: Hu Tao <hutao@cn.fujitsu.com>
Introduce qemuSetupCgroupEmulatorPin() function to add emulator
threads pin info to cpuset cgroup, the same as vcpupin.
Signed-off-by: Tang Chen <tangchen@cn.fujitsu.com>
Signed-off-by: Hu Tao <hutao@cn.fujitsu.com>
This patch adds a new xml element <emulatorpin>, which is a sibling
to the existing <vcpupin> element under the <cputune>, to pin emulator
threads to specified physical CPUs.
Signed-off-by: Tang Chen <tangchen@cn.fujitsu.com>
Signed-off-by: Hu Tao <hutao@cn.fujitsu.com>
vcpu threads pin are implemented using sched_setaffinity(), but
not controlled by cgroup. This patch does the following things:
1) enable cpuset cgroup
2) reflect all the vcpu threads pin info to cgroup
Signed-off-by: Tang Chen <tangchen@cn.fujitsu.com>
Signed-off-by: Hu Tao <hutao@cn.fujitsu.com>
Create a new cgroup and move all emulator threads to the new cgroup.
And then we can do the other things:
1. limit only vcpu usage rather than the whole qemu
2. limit for emulator threads(include vhost-net threads)
Signed-off-by: Wen Congyang <wency@cn.fujitsu.com>
Signed-off-by: Tang Chen <tangchen@cn.fujitsu.com>
Signed-off-by: Hu Tao <hutao@cn.fujitsu.com>
Introduce a new API to move tasks of one controller from a cgroup to another cgroup
Signed-off-by: Wen Congyang <wency@cn.fujitsu.com>
Signed-off-by: Tang Chen <tangchen@cn.fujitsu.com>
Signed-off-by: Hu Tao <hutao@cn.fujitsu.com>
Introduce the function virCgroupForEmulator() to create sub directory
for simulator thread(include I/O thread, vhost-net thread)
Signed-off-by: Wen Congyang <wency@cn.fujitsu.com>
Signed-off-by: Tang Chen <tangchen@cn.fujitsu.com>
Signed-off-by: Hu Tao <hutao@cn.fujitsu.com>
Qemu command line generation for geometry override and testcases.
Signed-off-by: J.B. Joret <jb@linux.vnet.ibm.com>
Signed-off-by: Viktor Mihajlovski <mihajlov@linux.vnet.ibm.com>
A hypervisor may allow to override the disk geometry of drives.
Qemu, as an example with cyls=,heads=,secs=[,trans=].
This patch extends the domain config to allow the specification of
disk geometry with libvirt.
Signed-off-by: J.B. Joret <jb@linux.vnet.ibm.com>
Signed-off-by: Viktor Mihajlovski <mihajlov@linux.vnet.ibm.com>
Older automake 1.9.6 (hello there, RHEL 5) did not populate
$(builddir), which meant 'make check' failed with:
make[3]: *** No rule to make target `/.libs/libvirt.la', needed by `check-symfile'. Stop.
For that matter, even newer automake doesn't directly emit rules
to build .libs/libvirt.la; we are better off basing our rules
on the public ./libvirt.la.
* src/Makefile.am (check-symfile): Delete useless variable.
Without this patch, RHEL 5 fails to compile, since the dbus
files lives under /usr/include/dbus-1.0/dbus/dbus.h, and
DBUS_CFLAGS contains -I/usr/include/dbus-1.0.
In file included from network/bridge_driver.c:67:
../src/util/virdbus.h:26:25: error: dbus/dbus.h: No such file or directory
* src/Makefile.am (libvirt_driver_network_impl_la_CFLAGS): Add
DBUS_CFLAGS.
When gcc atomic intrinsics are not available (such as on RHEL 5
with gcc 4.1.2), we were getting link errors due to multiple
definitions:
./.libs/libvirt_util.a(libvirt_util_la-virobject.o): In function `virAtomicIntXor':
/home/dummy/l,ibvirt/src/util/viratomoic.h:404: multiple definition of `virAtomicIntXor'
./.libs/libvirt_util.a(libvirt_util_la-viratomic.o):/home/dummy/libvirt/src/util/viratomic.h:404: first defined here
Solve this by conditionally marking the functions static (the
condition avoids falling foul of gcc warnings about unused
static function declarations).
* src/util/viratomic.h: When not using gcc intrinsics, use static
functions to avoid linker errors on duplicate functions.
Building on RHEL 5 warned:
nodeinfo.c: 305: warning: implicit declaration of function 'CPU_COUNT'
This extension macro in <sched.h> was not added until later glibc.
* src/nodeinfo.c (CPU_COUNT): Add fallback implementation.
We already skip out on building the LXC under RHEL 5, because the
kernel is too old (commits 4c18acf, 2dee896); but commit 9612e4b
moved some LXC-only code into common files, resulting in this
build failure:
util/virfile.c: In function 'virFileLoopDeviceAssociate':
util/virfile.c:580: error: 'LO_FLAGS_AUTOCLEAR' undeclared (first use in this function)
Unfortunately, the kernel folks only made it an enum, rather than
also a #define, so we have to modify configure.ac to record when
it is usable.
* configure.ac (with_lxc): Mark when LO_FLAGS_AUTOCLEAR was found.
* src/util/virfile.c (virFileLoopDeviceAssociate): Avoid
compilation when kernel is too old.
Fix possible double close in the child process after the fork in case
infd and outfd are equal, just like they are after being called from
virNetSocketNewConnectCommand.
* configure.ac, spec file: firewalld defaults to enabled if dbus is
available, otherwise is disabled. If --with_firewalld is explicitly
requested and dbus is not available, configure will fail.
* bridge_driver: add dbus filters to get the FirewallD1.Reloaded
signal and DBus.NameOwnerChanged on org.fedoraproject.FirewallD1.
When these are encountered, reload all the iptables reuls of all
libvirt's virtual networks (similar to what happens when libvirtd is
restarted).
* iptables, ebtables: use firewall-cmd's direct passthrough interface
when available, otherwise use iptables and ebtables commands. This
decision is made once the first time libvirt calls
iptables/ebtables, and that decision is maintained for the life of
libvirtd.
* Note that the nwfilter part of this patch was separated out into
another patch by Stefan in V2, so that needs to be revised and
re-reviewed as well.
================
All the configure.ac and specfile changes are unchanged from Thomas'
V3.
V3 re-ran "firewall-cmd --state" every time a new rule was added,
which was extremely inefficient. V4 uses VIR_ONCE_GLOBAL_INIT to set
up a one-time initialization function.
The VIR_ONCE_GLOBAL_INIT(x) macro references a static function called
vir(Ip|Eb)OnceInit(), which will then be called the first time that
the static function vir(Ip|Eb)TablesInitialize() is called (that
function is defined for you by the macro). This is
thread-safe, so there is no chance of any race.
IMPORTANT NOTE: I've left the VIR_DEBUG messages in these two init
functions (one for iptables, on for ebtables) as VIR_WARN so that I
don't have to turn on all the other debug message just to see
these. Even if this patch doesn't need any other modification, those
messages need to be changed to VIR_DEBUG before pushing.
This one-time initialization works well. However, I've encountered
problems with testing:
1) Whenever I have enabled the firewalld service, *all* attempts to
call firewall-cmd from within libvirtd end with firewall-cmd hanging
internally somewhere. This is *not* the case if firewall-cmd returns
non-0 in response to "firewall-cmd --state" (i.e. *that* command runs
and returns to libvirt successfully.)
2) If I start libvirtd while firewalld is stopped, then start
firewalld later, this triggers libvirtd to reload its iptables rules,
however it also spits out a *ton* of complaints about deletion failing
(I suppose because firewalld has nuked all of libvirt's rules). I
guess we need to suppress those messages (which is a more annoying
problem to fix than you might think, but that's another story).
3) I noticed a few times during this long line of errors that
firewalld made a complaint about "Resource Temporarily
unavailable. Having libvirtd access iptables commands directly at the
same time as firewalld is doing so is apparently problematic.
4) In general, I'm concerned about the "set it once and never change
it" method - if firewalld is disabled at libvirtd startup, causing
libvirtd to always use iptables/ebtables directly, this won't cause
*terrible* problems, but if libvirtd decides to use firewall-cmd and
firewalld is later disabled, libvirtd will not be able to recover.
Generating "Unable to add lockspace /lock/space/dir/__LIBVIRT__DISKS__:
No such file or directory" is correct but not exactly clear. This patch
changes the error message to "Unable to create lockspace
/lock/space/dir/__LIBVIRT__DISKS__: parent directory does not exist or
is not a directory".
When running libvirtd from a build directory, libvirtd would load lock
drivers from system directory unless explicitly overridden by setting
LIBVIRT_LOCK_MANAGER_PLUGIN_DIR environment variable. Since we already
autodetect driver directory if libvirt is build with driver modules, we
can use the same trick to automagically set lock driver directory.
Commit 1d22ba95 was complete at the time, but we have since
reintroduced a warning that is fixed in the same manner:
CCLD storagebackendsheepdogtest
*** Warning: Linking the executable storagebackendsheepdogtest against the loadable module
*** libvirt_driver_storage.so is not portable!
* src/Makefile.am (libvirt_driver_storage.la): Factor into new
convenience library libvirt_driver_storage_impl.la.
* tests/Makefile.am (storagebackendsheepdogtest_LDADD): Link to
convenience library, not shared library.
Our existing STRNEQ_NULLABLE() triggered a warning in gcc 4.7 when
used with a literal NULL argument:
qemumonitorjsontest.c: In function 'testQemuMonitorJSONGetMachines':
qemumonitorjsontest.c:289:5: error: null argument where non-null required (argument 1) [-Werror=nonnull]
even though the strcmp is provably dead when a null argument is
present. Squelch the warning by refactoring things so that gcc
never sees strcmp() called with NULL arguments (we still compare
NULL as not equal to "", this rewrite merely aids gcc).
Next, gcc has a valid warning about a literal NULLSTR(NULL):
qemumonitorjsontest.c:289:5: error: invalid application of 'sizeof' to a void type [-Werror=pointer-arith]
Of course, you'd never write NULLSTR(NULL) directly, but it is
handy to use through macros. But the entire part about verify_true()
is unnecessary - gcc already warns about type mismatch with ?:,
without needing to make it more complex.
* src/internal.h (STREQ_NULLABLE, STRNEQ_NULLABLE): Avoid gcc 4.7
stupidity.
(NULLSTR): Simplify, to allow passing compile-time constants.
The DAC security driver uses the virStrToLong_ui function to
parse the uid/gid out of the seclabel string. This works on
Linux where 'uid_t' is an unsigned int, but on Mingw32 it is
just an 'int'. This causes compiler warnings about signed/
unsigned int pointer mis-match.
To avoid this, use explicit 'unsigned int ouruid' local
vars to pass into virStrToLong_ui, and then simply assign
to the 'uid_t' type after parsing
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
This patch adds URI options to support libssh2 transport in the remote
driver.
A new transport sceme is introduced eg. "qemu+libssh2://..." that
utilizes the libssh2 code added in previous patches.
The libssh2 code requires the authentication callback to be able to
perform keyboard-interactive authentication or to ask t passprhases or
add host keys to known hosts database.
Added URI components:
- known_hosts - path to a knownHosts file in OpenSSH format to check
for known ssh host keys
- known_hosts_verify - how to deal with server key verification:
* "normal" (default) - ask to add new keys
* "auto" - automaticaly add new keys
* "ignore" - don't validate host keys
- sshauth - authentication methods to use. Default is
"agent,privkey,keyboard-interactive". It's a comma separated
string of methods to try while authenticating. The order is
preserved. Some of the methods may require additional
parameters.
Locations of the known_hosts file and private keys are set to default
values if they're present. (~/.ssh/known_hosts, ~/.ssh/id_rsa,
~/.ssh/id_dsa)
This patch adds a glue layer to enable using libssh2 code with the
network client code.
As in the original client implementation, shell code is sent to the
server to detect correct options for netcat and connect to libvirt's
unix socket.
This patch enables virNetSocket to be used as an ssh client when
properly configured.
This patch adds function virNetSocketNewConnectLibSSH2() that takes all
needed parameters and creates a libssh2 session and performs steps
needed to open the connection and then create a virNetSocket that
seamlesly encapsulates the communication.
This patch adds helper functions that enable us to use libssh2 in
conjunction with libvirt's virNetSockets for ssh transport instead of
spawning "ssh" client process.
This implemetation supports tunneled plaintext, keyboard-interactive,
private key, ssh agent based and null authentication. Libvirt's Auth
callback is used for interaction with the user. (Keyboard interactive
authentication, adding of host keys, private key passphrases). This
enables seamless integration into the application using libvirt. No
helpers as "ssh-askpass" are needed.
Reading and writing of OpenSSH style "known_hosts" files is supported.
Communication is done using SSH exec channel, where the user may specify
arbitrary command to be executed on the remote side and reads and writes
to/from stdin/out are sent through the ssh channel. Usage of stderr is
not (yet) supported.
Currently the dynamic label generation code will create labels
with a sensitivity of s0, and a category pair in the range
0-1023. This is fine when running a standard MCS policy because
libvirtd will run with a label
system_u:system_r:virtd_t:s0-s0:c0.c1023
With custom policies though, it is possible for libvirtd to have
a different sensitivity, or category range. For example
system_u:system_r:virtd_t:s2-s3:c512.c1023
In this case we must assign the VM a sensitivity matching the
current lower sensitivity value, and categories in the range
512-1023
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
The code to refactor sec label handling accidentally changed the
SELinux driver to use the 'domain_context' when generating the
image label instead of the 'file_context'
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
After the cleanup of remote display port allocation, I noticed some
messages that didn't make a lot of sense the way they were written. So
I rephrased them.
The defines QEMU_REMOTE_PORT_MIN and QEMU_REMOTE_PORT_MAX were used to
find free port when starting domains. As this was hard-coded to the
same ports as default VNC servers, there were races with these other
programs. This patch includes the possibility to change the default
starting port as well as the maximum port (mostly for completeness) in
qemu config file.
Support for two new config options in qemu.conf is added:
- remote_port_min (defaults to QEMU_REMOTE_PORT_MIN and
must be >= than this value)
- remote_port_max (defaults to QEMU_REMOTE_PORT_MAX and
must be <= than this value)
Port allocations for SPICE and VNC behave almost the same (with
default ports), but there is some mess in the code. This patch clears
these inconsistencies and makes sure the same behavior will be used
when ports for remote displays are changed.
Changes:
- hard-coded number 5900 removed (handled elsewhere like with VNC)
- reservedVNCPorts renamed to reservedRemotePorts (it's not just for
VNC anymore)
- QEMU_VNC_PORT_{MIN,MAX} renamed to QEMU_REMOTE_PORT_{MIN,MAX}
- port allocation unified for VNC and SPICE
This patch updates libvirt's API to allow applications to inspect the
full list of security labels of a domain.
Signed-off-by: Marcelo Cerri <mhcerri@linux.vnet.ibm.com>
This patch updates the key "security_driver" in QEMU config to suport
both a sigle default driver or a list of default drivers. This ensures
that it will remain compatible with older versions of the config file.
Signed-off-by: Marcelo Cerri <mhcerri@linux.vnet.ibm.com>
These changes make the security drivers able to find and handle the
correct security label information when more than one label is
available. They also update the DAC driver to be used as an usual
security driver.
Signed-off-by: Marcelo Cerri <mhcerri@linux.vnet.ibm.com>
This patch updates the domain and capability XML parser and formatter to
support more than one "seclabel" element for each domain and device. The
RNG schema and the tests related to this are also updated by this patch.
Signed-off-by: Marcelo Cerri <mhcerri@linux.vnet.ibm.com>
This patch updates the structures that store information about each
domain and each hypervisor to support multiple security labels and
drivers. It also updates all the remaining code to use the new fields.
Signed-off-by: Marcelo Cerri <mhcerri@linux.vnet.ibm.com>
This is a fix for the object label generation. It uses a new flag for
virSecuritySELinuxGenNewContext that specifies whether the context is
for an object. If so the context role remains unchanged.
Without this fix it is not possible to start domains with image file or
block device backed storage when selinux is enabled.
Signed-off-by: Viktor Mihajlovski <mihajlov@linux.vnet.ibm.com>
In order to support systemd socket based activation, it needs to
be possible to create virNetSocketPtr and virNetServerServicePtr
instance from a pre-opened file descriptor
In preparation for adding further constructors, refactor
the virNetServerClientNew method to move most of the code
into a common virNetServerClientNewInternal helper API.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Currently the virNetServerDispatchNewClient both creates the
virNetServerClientPtr instance and registers it with the
virNetServerPtr internal state. Split the client registration
code out into a separate virNetServerAddClient method to
allow future reuse from other contexts
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
For network devices allocated from a network with <forward
mode='hostdev'>, there is a need to add the newly minted hostdev to
the hostdevs array.
In this case we also need to call qemuPrepareHostDevices just for this
one device, as the standard call to initialize all the hostdevs that
were defined directly in the domain's configuration has already been
made by the time we allocate a device from a libvirt network, and thus
have something that needs initializing.
Signed-off-by: Shradha Shah <sshah@solarflare.com>
This patch updates the network driver to properly utilize the new
attributes/elements that are now in virNetworkDef
Signed-off-by: Shradha Shah <sshah@solarflare.com>
Signed-off-by: Laine Stump <laine@laine.org>
This function is needed by the network driver in a later commit.
It is useful in functions like networkNotifyActualDevice and
networkReleaseActualDevice
The network pool should be able to keep track of both network device
names and PCI addresses, and return the appropriate one in the
actualDevice when networkAllocateActualDevice is called.
Signed-off-by: Shradha Shah <sshah@solarflare.com>
This patch introduces the new forward mode='hostdev' along with
attribute managed. Includes updates to the network RNG and new xml
parser/formatter code.
Signed-off-by: Shradha Shah <sshah@solarflare.com>
Existing code that creates a list of forwardIfs from a single PF
was moved to the new utility function networkCreateInterfacePool.
No functional change.
Signed-off-by: Shradha Shah <sshah@solarflare.com>
Move the functions the parse/format, and validate PCI addresses to
their own file so they can be conveniently used in other places
besides device_conf.c
Refactoring existing code without causing any functional changes to
prepare for new code.
This patch makes the code reusable.
Signed-off-by: Shradha Shah <sshah@solarflare.com>
Change device type of a virtio channel from/to spicevmc is not a user
visible change. However, spicevmc channels use different default target
name than other virtio channels. To maintain ABI stability during this
change target name must be explicitly specified (and equal) in both
configurations.
Add the ability to support VLAN tags for Open vSwitch virtual port
types. To accomplish this, modify virNetDevOpenvswitchAddPort and
virNetDevTapCreateInBridgePort to take a virNetDevVlanPtr
argument. When adding the port to the OVS bridge, setup either a
single VLAN or a trunk port based on the configuration from the
virNetDevVlanPtr.
Signed-off-by: Kyle Mestery <kmestery@cisco.com>
Setting hard_limit larger than previous swap_hard_limit must fail,
it's not that good if one wants to change the swap_hard_limit
and hard_limit together. E.g.
% virsh memtune rhel6
hard_limit : 1000000
soft_limit : 1000000
swap_hard_limit: 1000000
% virsh memtune rhel6 --hard-limit 1000020 --soft-limit 1000020 \
--swap-hard-limit 1000020 --live
This patch reorder the limits setting to set the swap_hard_limit
first, hard_limit then, and soft_limit last if it's greater than
current swap_hard_limit. And soft_limit first, hard_limit then,
swap_hard_limit last, if not.
'make distcheck' fails because the generated ESX and HyperV files
are (intentionally) marked read-only, but since the stamp file was
missing, make assumes they need to be rebuilt. Shipping the stamp
file solves the problem.
* src/Makefile.am (EXTRA_DIST): Ship stamp files.
The underlying function to set the vlan tag of an SR-IOV network
device was already in place (although an extra patch to save/restore
the original vlan tag was needed), and recent patches added the
ability to configure a vlan tag. This patch just ties those two
together.
An SR-IOV device doesn't support vlan trunking, so if anyone tries to
configure more than a single tag, or set the trunk flag, and error is
logged.
When a network device that is a VF of an SR-IOV card was assigned to a
guest using <interface type='hostdev'>, only the MAC address was being
saved/restored, but the VLAN tag was left untouched. Up to now we
haven't actually used vlan tags on SR-IOV devices, so the guest would
have used whatever was set, and left it the same at the end.
The patch following this one will hook up the <vlan> element from the
interface config, so save/restore of the device state needs to also
include the vlan tag.
MAC address is being saved as a simple ASCII string in a file named
for the device under /var/run. The VLAN tag is now just added at the
end of that file, after a newline. It might be nicer if the file was
XML (in case it ever gets more complicated) but at the moment there's
nothing else on the horizon, and this makes backward compatibility
easier.
The parameter value for cpuset could be in special format like
"0-10,^7", which is not recognized by cgroup. This patch is to
ensure the cpuset is formatted as expected before passing it to
cgroup. As a side effect, after the patch, it parses the cpuset
early before cgroup setting, to avoid the rollback if cpuset
parsing fails afterwards.
Previous commit:
commit 9093ab7734
Author: Daniel P. Berrange <berrange@redhat.com>
Date: Wed Jul 18 17:03:17 2012 +0100
Add lots of internal symbols to libvirt_private.syms
mistakenly put some conditional SASL symbols in libvirt_private.syms
instead of libvirt_sasl.syms
The network driver now looks for the vlan element in network and
portgroup objects, and logs an error at network define time if a vlan
is requested for a network type that doesn't support it. (Currently
vlan configuration is only supported for openvswitch networks, and
networks used to do hostdev assignment of SR-IOV VFs.)
At runtime, the three potential sources of vlan information are
examined in this order: interface, chosen portgroup, network, and the
first that is non-empty is used. Another check for valid network type
is made at this time, since the interface may have requested a vlan (a
legal thing to have in the interface config, since it's not known
until runtime if the chosen network will actually support it).
Since we must also check for domains requesting vlans for unsupported
connection types even if they are type='network', and since
networkAllocateActualDevice() is being called in exactly the correct
places, and has all of the necessary information to check, I slightly
modified the logic of that function so that interfaces that aren't
type='network' don't just return immediately. Instead, they also
perform all the same validation for supported features. Because of
this, it's not necessary to make this identical check in the other
three places that would normally require it: 1) qemu domain startup,
2) qemu device hotplug, 3) lxc domain startup.
This can be seen as a first step in consolidating network-related
functionality into the network driver, rather than having copies of
the same code spread around in multiple places; this will make it
easier to split the network parts off into a separate daemon, as we've
discussed recently.
The following config elements now support a <vlan> subelements:
within a domain: <interface>, and the <actual> subelement of <interface>
within a network: the toplevel, as well as any <portgroup>
Each vlan element must have one or more <tag id='n'/> subelements. If
there is more than one tag, it is assumed that vlan trunking is being
requested. If trunking is required with only a single tag, the
attribute "trunk='yes'" should be added to the toplevel <vlan>
element.
Some examples:
<interface type='hostdev'/>
<vlan>
<tag id='42'/>
</vlan>
<mac address='52:54:00:12:34:56'/>
...
</interface>
<network>
<name>vlan-net</name>
<vlan trunk='yes'>
<tag id='30'/>
</vlan>
<virtualport type='openvswitch'/>
</network>
<interface type='network'/>
<source network='vlan-net'/>
...
</interface>
<network>
<name>trunk-vlan</name>
<vlan>
<tag id='42'/>
<tag id='43'/>
</vlan>
...
</network>
<network>
<name>multi</name>
...
<portgroup name='production'/>
<vlan>
<tag id='42'/>
</vlan>
</portgroup>
<portgroup name='test'/>
<vlan>
<tag id='666'/>
</vlan>
</portgroup>
</network>
<interface type='network'/>
<source network='multi' portgroup='test'/>
...
</interface>
IMPORTANT NOTE: As of this patch there is no backend support for the
vlan element for *any* network device type. When support is added in
later patches, it will only be for those select network types that
support setting up a vlan on the host side, without the guest's
involvement. (For example, it will be possible to configure a vlan for
a guest connected to an openvswitch bridge, but it won't be possible
to do that for one that is connected to a standard Linux host bridge.)
To allow for the possibility of vlan "trunks", which have more than
one vlan tag associated with them, we need a vlan struct. Since it
will be used by multiple files in src/util, src/conf, src/network, and
src/qemu, it must be defined in src/util. Unfortunately there isn't
currently a common file for simple netdev data definitions, so I
created a new file.
This caused compilation of virnetdevvportprofile.c to fail on systems
without IFLA support in netlink (these are netlink commands used to
configure the VF's of SR-IOV network devices).
