pointed out that we weren't honoring the <bandwidth> element in
libvirt networks using <forward mode='bridge'/>. In fact, these
networks are just a method of giving a libvirt network name to an
existing Linux host bridge on the system, and libvirt doesn't have
enough information to know where to set such limits. We are working on
a method of supporting network bandwidths for some specific cases of
<forward mode='bridge'/>, but currently libvirt doesn't support it. So
the proper thing to do now is just log an error when someone tries to
put a <bandwidth> element in that type of network. (It's unclear if we
will be able to do proper bandwidth limiting for macvtap networks, and
most definitely we will not be able to support it for hostdev
networks).
While looking through the network XML documentation and comparing it
to the networkValidate function, I noticed that we also ignore the
presence of a mac address in the config in the same cases, rather than
failing so that the user will understand that their desired action has
not been taken.
This patch updates networkValidate() (which is called any time a
persistent network is defined, or a transient network created) to log
an error and fail if it finds either a <bandwidth> or <mac> element
and the network forward mode is anything except 'route'. 'nat', or
nothing. (Yes, neither of those elements is acceptable for any macvtap
mode, nor for a hostdev network).
NB: This does *not* cause failure to start any existing network that
contains one of those elements, so someone might have erroneously
defined such a network in the past, and that network will continue to
function unmodified. I considered it too disruptive to suddenly break
working configs on the next reboot after a libvirt upgrade.
When loading modules, libvirt does not honor the modprobe blacklist.
Use the new virKModLoad() API in order to attempt load with blacklist check.
Use the new virKModIsBlacklisted() API to check if the failure to load
was due to the blacklist
John Ferlan [Wed, 29 Jan 2014 14:36:26 +0000 (09:36 -0500)]
utils: Introduce functions for kernel module manipulation
virKModConfig() - Return a buffer containing kernel module configuration
virKModLoad() - Load a specific module into the kernel configuration
virKModUnload() - Unload a specific module from the kernel configuration
virKModIsBlacklisted() - Determine whether a module is blacklisted within
the kernel configuration
Laine Stump [Tue, 4 Feb 2014 11:12:47 +0000 (13:12 +0200)]
qemu: be sure we're using the updated value of backend during hotplug
commit f094aaac changed qemuPrepareHostdevPCIDevices() such that it
may modify the "backend" (vfio vs. legacy kvm) setting in the
virHostdevDef. However, qemuDomainAttachHostPciDevice() (used by
hotplug) copies the backend setting into a local *before* calling
qemuPrepareHostdevPCIDevices(), and then later makes a decision based
on that pre-change value.
The result is that, if the backend had been set to "default" (i.e. not
specified in the config) and was later updated to "VFIO" by
qemuPrepareHostdevPCIDevices(), the qemu process' MacMemLock is not
increased (as is required for VFIO device assignment).
This patch delays making the local copy of backend until after its
potential modification.
The project has historically operated as a meritocratic
consensus based community. Formally document what has
always been an unwritten assumption amongst the community
participants. Also include an explicit code of conduct
to preempt any potential, but unlikely, future problems.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Laine Stump [Fri, 31 Jan 2014 13:50:16 +0000 (15:50 +0200)]
network: change default of forwardPlainNames to 'yes'
The previous patch fixed "forwardPlainNames" so that it really is
doing only what is intended, but left the default to be
"forwardPlainNames='no'". Discussion around the initial version of
that patch led to the decision that the default should instead be
"forwardPlainNames='yes'" (i.e. the original behavior before commit f3886825). This patch makes that change to the default.
to all dnsmasq commandlines with the stated reason of preventing
forwarding of DNS queries for names that weren't fully qualified
domain names ("FQDN", i.e. a name that included some "."s and a domain
name). This was later changed to
domain-needed
local=/$mydomain/
when we moved the options from the dnsmasq commandline to a conf file.
The original patch on the list, and discussion about it, is here:
When a domain name isn't specified (mydomain == ""), the addition of
"domain-needed local=//" will prevent forwarding of domain-less
requests to the virtualization host's DNS resolver, but if a domain
*is* specified, the addition of "local=/domain/" will prevent
forwarding of any requests for *qualified* names within that domain
that aren't resolvable by libvirt's dnsmasq itself.
An example of the problems this causes - let's say a network is
defined with:
This results in "local=/example.com/" being added to the dnsmasq options.
If a guest requests "myguest" or "myguest.example.com", that will be
resolved by dnsmasq. If the guest asks for "www.example.com", dnsmasq
will not know the answer, but instead of forwarding it to the host, it
will return NOT FOUND to the guest. In most cases that isn't the
behavior an admin is looking for.
A later patch (commit 4f595ba) attempted to remedy this by adding a
"forwardPlainNames" attribute to the <dns> element. The idea was that
if forwardPlainNames='yes' (default is 'no'), we would allow
unresolved names to be forwarded. However, that patch was botched, in
that it only removed the "domain-needed" option when
forwardPlainNames='yes', and left the "local=/mydomain/".
Really we should have been just including the option "--domain-needed
--local=//" (note the lack of domain name) regardless of the
configured domain of the network, so that requests for names without a
domain would be treated as "local to dnsmasq" and not forwarded, but
all others (including those in the network's configured domain) would
be forwarded. We also shouldn't include *either* of those options if
forwardPlainNames='yes'. This patch makes those corrections.
This patch doesn't remedy the fact that default behavior was changed
by the addition of this feature. That will be handled in a subsequent
patch.
I've received a notice over IRC that on some systems, the
virnetdevbandwidthtest is not linked with libxml:
/usr/bin/ld: virnetdevbandwidthtest.o: undefined reference to symbol 'xmlStrEqual@@LIBXML2_2.4.30'
/usr/lib/x86_64-linux-gnu/libxml2.so.2: error adding symbols: DSO missing from command line
Trivial way avoiding this is to add LIBXML_LIBS to
virnetdevbandwidthtest_LDADD.
spice: don't force user to specify spicevmc channel
We support only one spicevmc channel name anyway and the code is
prepared to use the default one, there's only one check missing. It
is also mentioned in the documentation already and helps defining
domains with spice vdagent for people using virsh.
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
John Ferlan [Fri, 31 Jan 2014 16:32:28 +0000 (11:32 -0500)]
Resolve Coverity dead_error_begin
Coverity complains about default: label in libxl_driver.c not be able
to be reached. It's by design for the code and since it's not necessary
in the code nor does it elicit any compiler/make check warnings - just
remove it rather than adding a coverity[dead_error_begin] tag.
While I'm at it, lxc_driver.c and nodeinfo.c have the same design, so I
removed the default labels and the existing coverity tags.
Michal Privoznik [Fri, 31 Jan 2014 14:04:03 +0000 (15:04 +0100)]
virnetdevbandwidthtest: Introduce some more tests
And while doing this, fix one error raised by coverity. With
current code, @actual_cmd is allowed to be NULL for the whole
run of testVirNetDevBandwidthSet. However, if something else
was expected, the @actal_cmd is passed to virtTestDifference
which dereference it immediately.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Cédric Bosdonnat [Fri, 31 Jan 2014 08:52:30 +0000 (09:52 +0100)]
virnetdevbandwidthtest: fix hard coded /sbin/tc
On openSuse, (and possibly other distros), tc isn't located in
/sbin/tc. To get rid of that problem, use TC constant instead of hard
coded /sbin/tc in the expected string
The NWFilter code has as a deadlock race condition between
the virNWFilter{Define,Undefine} APIs and starting of guest
VMs due to mis-matched lock ordering.
In the virNWFilter{Define,Undefine} codepaths the lock ordering
is
This has the effect of serializing VM startup once again, even if
no nwfilters are applied to the guest. There is also the possibility
of deadlock due to a call graph loop via virNWFilterInstantiate
and virNWFilterInstantiateFilterLate.
These two problems mean the lock must be turned into a read/write
lock instead of a plain mutex at the same time. The lock is used to
serialize changes to the "driver->nwfilters" hash, so the write lock
only needs to be held by the define/undefine methods. All other
methods can rely on a read lock which allows good concurrency.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Remove windows thread implementation in favour of pthreads
There are a number of pthreads impls available on Win32
these days, in particular the mingw64 project has a good
impl. Delete the native windows thread implementation and
rely on using pthreads everywhere.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Fix pthread_sigmask check for mingw32 without winpthreads
On Fedora 19 and older the pthreads impl provided with
mingw does not have any pthread_sigmask impl at all. The
configure.ac check was not distinguishing this scenario
from that of a broken pthread_sigmask impl, so was
mistakenly enabling the libvirt workaround even when it
was not needed. This in turn conflicted with the gnulib
provided pthread_sigmask impl.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Osier Yang [Thu, 30 Jan 2014 11:48:23 +0000 (19:48 +0800)]
tests: Modify the scsi util tests
Add tests/virscsidata/sg0 and tests/virscsidata/sg8 as the test
input for constructing scsi->sg_path. And change the scsi generic
number of "1:0:0:0", because it's easy to hide the problem (assuming
most machines have a CDROM drive).
Osier Yang [Thu, 30 Jan 2014 11:48:22 +0000 (19:48 +0800)]
util: Accept test data path for scsi device's sg_path
Commit 10c9ceff6d intended to introduce new argument for the
testing purpose, but it missed the similar changing of the
device's sg_path. The problem was hidden since my laptop has
the /dev/sg0 and /dev/sg1. A later patch will modify the tests
accordingly.
Signed-off-by: Osier Yang <jyang@redhat.com> Reported-by: Pavel Hrdina <phrdina@redhat.com>
It breaks the build on RHEL-5.10 and because it's only optional we
could remove it from the code. The default namespace will be used.
This hunk was introduced by commit 237a088ba44633b08e0528fe5103d99b1e213b71.
Osier Yang [Thu, 30 Jan 2014 07:05:59 +0000 (15:05 +0800)]
util: Add one argument for several scsi utils
To support passing the path of the test data to the utils, one
more argument is added to virSCSIDeviceGetSgName,
virSCSIDeviceGetDevName, and virSCSIDeviceNew, and the related
code is changed accordingly.
Later tests for the scsi utils will be based on this patch.
Osier Yang [Wed, 29 Jan 2014 17:22:42 +0000 (01:22 +0800)]
qemu: Don't fail if the SCSI host device is shareable between domains
It doesn't make sense to fail if the SCSI host device is specified
as "shareable" explicitly between domains (NB, it works if and only
if the device is specified as "shareable" for *all* domains,
otherwise it fails).
To fix the problem, this patch introduces an array for virSCSIDevice
struct, which records all the names of domain which are using the
device (note that the recorded domains must specify the device as
shareable). And the change on the data struct brings on many
subsequent changes in the code.
Prior to this patch, the "shareable" tag didn't work as expected,
it actually work like "non-shareable". So this patch also added notes
in formatdomain.html to declare the fact.
* src/util/virscsi.h:
- Remove virSCSIDeviceGetUsedBy
- Change definition of virSCSIDeviceGetUsedBy and virSCSIDeviceListDel
- Add virSCSIDeviceIsAvailable
* src/util/virscsi.c:
- struct virSCSIDevice: Change "used_by" to be an array; Add
"n_used_by" as the array count
- virSCSIDeviceGetUsedBy: Removed
- virSCSIDeviceFree: frees the "used_by" array
- virSCSIDeviceSetUsedBy: Copy the domain name to avoid potential
memory corruption
- virSCSIDeviceIsAvailable: New
- virSCSIDeviceListDel: Change the logic, for device which is already
in the list, just remove the corresponding entry in "used_by". And
since it's only used in one place, we can safely removing the code
to find out the dev in the list first.
- Copyright updating
* src/libvirt_private.sys:
- virSCSIDeviceGetUsedBy: Remove
- virSCSIDeviceIsAvailable: New
* src/qemu/qemu_hostdev.c:
- qemuUpdateActiveScsiHostdevs: Check if the device existing before
adding it to the list;
- qemuPrepareHostdevSCSIDevices: Error out if the not all domains
use the device as "shareable"; Also don't try to add the device
to the activeScsiHostdevs list if it already there; And make
more sensible error w.r.t the current "shareable" value in
driver->activeScsiHostdevs.
- qemuDomainReAttachHostScsiDevices: Change the logic according
to the changes on helpers.
The former one tried to implement QoS setting on bridgeless networks.
However, as discussed upstream [1], the patch is far away from being
useful in even a single case. The whole idea of network QoS is to have
aggregated limits over several interfaces. This patch is doing
completely the opposite when merging two QoS settings (from the network
and the domain interface) into one which is then set at the domain
interface itself, not the network.
The latter one is the test for the previous one. Now none of them makes
sense.
Michal Privoznik [Tue, 28 Jan 2014 18:18:43 +0000 (19:18 +0100)]
virCommand: Introduce virCommandSetDryRun
There are some units within libvirt that utilize virCommand API to run
some commands and deserve own unit testing. These units are, however,
not desired to be rewritten to dig virCommand API usage out. As a great
example virNetDevBandwidth could be used. The problem with the bandwidth
unit is: it uses virCommand API heavily. Therefore we need a mechanism
to not really run a command, but rather see its string representation
after which we can decide if the unit construct the correct sequence of
commands or not.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Peter Krempa [Tue, 12 Nov 2013 13:15:51 +0000 (14:15 +0100)]
snapshot: Add support for specifying snapshot disk backing type
Add support for specifying various types when doing snapshots. This will
later allow to do snapshots on network backed volumes. Disks of type
'volume' are not supported by snapshots (yet).
Also amend the test suite to check parsing of the various new disk
types that can now be specified.
Jim Fehlig [Wed, 29 Jan 2014 01:15:48 +0000 (18:15 -0700)]
xen: fix parsing xend http response
Commit df36af58 broke parsing of http response from xend. The prior
use of atoi() would happily parse e.g. a string containing "200 OK\r\n",
whereas virStrToLong_i() will fail when called with a NULL end_ptr.
Change the calls to virStrToLong_i() to provide a non-NULL end_ptr.
When all source CPU XMLs contain just a single CPU model (with a
possibly varying set of additional feature elements),
virConnectBaselineCPU will try to use this CPU model in the computed
guest CPU. Thus, when used on just a single CPU (useful with
VIR_CONNECT_BASELINE_CPU_EXPAND_FEATURES), the result will not use a
different CPU model.
If the computed CPU uses the source model, set fallback mode to 'forbid'
to make sure the guest CPU will always be as close as possible to the
source CPUs.
VIR_CONNECT_BASELINE_CPU_EXPAND_FEATURES flag for virConnectBaselineCPU
did not work if the resulting guest CPU would disable some features
present in its base model. This patch makes sure we won't try to add
such features twice.
Implement virProcess{Get,Set}Affinity() using cpuset_getaffinity()
and cpuset_setaffinity() calls. Quick search showed that they are
only available on FreeBSD, so placed it inside existing #ifdef
blocks for FreeBSD instead of adding configure checks.
Add hw random number generator (/dev/hwrng) to cgroup ACL
Creating a qemu VM with /dev/hwrng as backend RNG device throws the
following error - "Could not open '/dev/hwrng': Permission denied"
This patch fixes the issue
Signed-off-by: Pradipta Kr. Banerjee <bpradip@in.ibm.com> Signed-off-by: Eric Blake <eblake@redhat.com>
The bandwidth limitations can be, however, applied even on such
networks. In fact, they are going to be applied on the interface that
will be connected to the network on a domain startup. This approach,
however, has one limitation. With bridged networks, there are two points
where QoS can be set: bridge and domain interface. The lower limit of
the two is enforced then. For instance, if the interface has 10Mbps
average, but the network only 1Mbps, there's no way for interface to
transmit packets faster than the 1Mbps limit. With two points this is
enforced by kernel. With only one point, we must combine both QoS
settings into one which is set afterwards. Look at
virNetDevBandwidthMinimal() and you'll understand immediately what I
mean.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Dan Kenigsberg [Sun, 8 Dec 2013 14:05:46 +0000 (14:05 +0000)]
docs: add a permalink to html headers
Quite often, I need to cite URLs like
http://libvirt.org/formatnetwork.html#elementQoS
but it is annoying to copy them from the table of contents or the html
source.
This patch borrows from the Python documentation in order to make it
easier to cite headers on libvirt's oneline documentation.
Oleg Strikov [Thu, 23 Jan 2014 15:19:44 +0000 (19:19 +0400)]
qemu: Enable 'host-passthrough' cpu mode for aarch64
This patch allows libvirt user to specify 'host-passthrough'
cpu mode while using qemu/kvm backend on aarch64.
It uses 'host' as a CPU model name instead of some other stub
(correct CPU detection is not implemented yet) to allow libvirt
user to specify 'host-model' cpu mode as well.
Signed-off-by: Oleg Strikov <oleg.strikov@canonical.com>
(crobinso: fix some indentation)
Matthias Bolte [Wed, 22 Jan 2014 21:26:48 +0000 (22:26 +0100)]
tests: Fix PCI test data filenames for Windows
Windows doesn't allow : in filenames.
Commit 21685c955e546676a5b2a01f7b788d222e0ee0f5 added files with a : in
their names. This broke git operations on Windows as git is not able to
create those files on clone or pull.
Replace : with - in the offending filenames and adapt the test case.
John Ferlan [Tue, 17 Dec 2013 21:47:28 +0000 (16:47 -0500)]
Block info query: Add check for transient domain
Currently the qemuDomainGetBlockInfo will return allocation == physical
for most backing stores. For a qcow2 block backed device it's possible
to return the highest lv extent allocated from qemu for an active guest.
That is a value where allocation != physical and one would hope be less.
However, if the guest is not running, then the code falls back to returning
allocation == physical. This turns out to be problematic for rhev which
monitors the size of the backing store. During a migration, before the
VM has been started on the target and while it is deemed inactive on the
source, there's a small window of time where the allocation is returned
as physical triggering the code to extend the file unnecessarily.
Since rhev uses transient domains and this is edge condition for a transient
domain, rather than returning good status and allocation == physical when
this "window of opportunity" exists, this patch will check for a transient
(or non persistent) domain and return a failure to the caller rather than
returning the defaults. For a persistent domain, the defaults will be
returned. The description for the virDomainGetBlockInfo has been updated
to describe the phenomena.
Gao feng [Wed, 15 Jan 2014 08:19:28 +0000 (16:19 +0800)]
qemu: remove memset params array to zero in qemuDomainGetPercpuStats
the array params is allocated by VIR_ALLOC_N in
remoteDispatchDomainGetCPUStats. it had been set
to zero. No need to reset it to zero again, and
this reset here is incorrect too, nparams * ncpus
is the array length not the size of params array.
Eric Blake [Thu, 23 Jan 2014 22:21:59 +0000 (15:21 -0700)]
maint: update to latest gnulib, for mingw improvements
On Fedora 20, mingw-headers has switched over to winpthreads as
the provider for its <pthread.h>. winpthreads is notorious for
providing a less-than-stellar header, and needs several workarounds
before it can be used in a project assuming POSIX semantics. While
we still use Windows primitives rather than pthread when compiling
for mingw, this update will make it possible to switch to mingw
pthreads.
Osier Yang [Wed, 8 Jan 2014 14:51:29 +0000 (22:51 +0800)]
util: Add "shareable" field for virSCSIDevice struct
Unlike the host devices of other types, SCSI host device XML supports
"shareable" tag. This patch introduces it for the virSCSIDevice struct
for a later patch use (to detect if the SCSI device is shareable when
preparing the SCSI host device in QEMU driver).
Osier Yang [Mon, 6 Jan 2014 10:19:34 +0000 (18:19 +0800)]
storage: Fix autostart of pool with "fc_host" type adapter
The "checkPool" is a bit different for pool with "fc_host"
type source adapter, since the vHBA it's based on might be
not created yet (it's created by "startPool", which is
involked after "checkPool" in storageDriverAutostart). So it
should not fail, otherwise the "autostart" of the pool will
fail either.
The problem is easy to reproduce:
* Enable "autostart" for the pool
* Restart libvirtd service
* Check the pool's state
Osier Yang [Wed, 22 Jan 2014 14:39:42 +0000 (22:39 +0800)]
storage: Add document for possible problem on volume detection
For pool which relies on remote resources, such as a "iscsi" type
pool, since how long it takes to export the corresponding devices
to host's sysfs is really depended, it could depend on the network
connection, it also could depend on the host's udev procedures. So
it's likely that the volumes are not able to be detected during pool
starting process, polling the sysfs doesn't work, since we don't
know how much time is best for the polling, and even worse, the
volumes could still be not detected or partly not detected even after
the polling. So we end up with a documentation to prompt the fact,
in virsh manual.
And as a small improvement, let's explicitly say no LUNs found in
the debug log in that case.
Osier Yang [Wed, 22 Jan 2014 09:18:44 +0000 (17:18 +0800)]
util: Correct the NUMA node range checking
There are 2 issues here: First we shouldn't add "1" to the return
value of numa_max_node(), since the semanteme of the error message
was changed, it's not saying about the number of total NUMA nodes
anymore. Second, the value of "bit" is the position of the first
bit which exceeds either numa_max_node() or NUMA_NUM_NODES, it can
be any number in the range, so saying "bigger than $bit" is quite
confused now. For example, assuming there is a NUMA machine which
has 10 NUMA nodes, and one specifies the "nodeset" as "0,5,88",
the error message will be like:
Nodeset is out of range, host cannot support NUMA node bigger than 88
It sounds like all NUMA node number less than 88 is fine, but
actually the maximum NUMA node number the machine supports is 9.
This patch fixes the issues by removing the addition with "1" and
simplifies the error message as "NUMA node $bit is out of range".
Also simplifies the comparision in the while loop by getting the
smaller one of numa_max_node() and NUMA_NUM_NODES up front.
Eric Blake [Tue, 21 Jan 2014 17:37:29 +0000 (10:37 -0700)]
api: require write permission for guest agent interaction
I noticed that we allow virDomainGetVcpusFlags even for read-only
connections, but that with a flag, it can require guest agent
interaction. It is feasible that a malicious guest could
intentionally abuse the replies it sends over the guest agent
connection to possibly trigger a bug in libvirt's JSON parser,
or withhold an answer so as to prevent the use of the agent
in a later command such as a shutdown request. Although we
don't know of any such exploits now (and therefore don't mind
posting this patch publicly without trying to get a CVE assigned),
it is better to err on the side of caution and explicitly require
full access to any domain where the API requires guest interaction
to operate correctly.
I audited all commands that are marked as conditionally using a
guest agent. Note that at least virDomainFSTrim is documented
as needing a guest agent, but that such use is unconditional
depending on the hypervisor (so the existing domain:fs_trim ACL
should be sufficient there, rather than also requirng domain:write).
But when designing future APIs, such as the plans for obtaining
a domain's IP addresses, we should copy the approach of this patch
in making interaction with the guest be specified via a flag, and
use that flag to also require stricter access checks.
* src/libvirt.c (virDomainGetVcpusFlags): Forbid guest interaction
on read-only connection.
(virDomainShutdownFlags, virDomainReboot): Improve docs on agent
interaction.
* src/remote/remote_protocol.x
(REMOTE_PROC_DOMAIN_SNAPSHOT_CREATE_XML)
(REMOTE_PROC_DOMAIN_SET_VCPUS_FLAGS)
(REMOTE_PROC_DOMAIN_GET_VCPUS_FLAGS, REMOTE_PROC_DOMAIN_REBOOT)
(REMOTE_PROC_DOMAIN_SHUTDOWN_FLAGS): Require domain:write for any
conditional use of a guest agent.
* src/xen/xen_driver.c: Fix clients.
* src/libxl/libxl_driver.c: Likewise.
* src/uml/uml_driver.c: Likewise.
* src/qemu/qemu_driver.c: Likewise.
* src/lxc/lxc_driver.c: Likewise.
Bugs have been found in the VirtualBox API C bindings. These bugs have
been fixed in versions 4.2.20 and 4.3.4. However, the changes in the
C bindings are incompatible with the vbox_CAPI_v4_2.h and vbox_CAPI_v4_3.h
files which are bundled in libvirt source code.
This is why the following patch adds vbox_CAPI_v4_2_20.h and
vbox_CAPI_v4_3_4.h.
The actual underlying problem here is that until now,
libvirt assumed that VirtualBox API can only change between minor
versions (4.2 -> 4.3), but we have a case here where it changed
(or got fixed) between patch versions (4.2.18 -> 4.2.20).
This patch makes the VBOX_API_VERSION represent the full API
version number (i.e 4002 => 4002000) so there are specific version
numbers for Vbox 4.2.20 (4002020) and 4.3.4 (4003004)
Peter Krempa [Wed, 22 Jan 2014 09:27:52 +0000 (10:27 +0100)]
qemu: Avoid crash in qemuDiskGetActualType
Libvirtd would crash if a domain contained an empty cdrom drive of
type='volume' as the disk def->srcpool member would be dereferenced. Fix
it by checking if the source pool is present before dereferencing it.
Also alter tests to catch this issue in the future.
Reported by: Kevin Shanahan
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1056328
Osier Yang [Wed, 22 Jan 2014 06:55:34 +0000 (14:55 +0800)]
Doc: Improve the document for nodesuspend
Explicitly lists the possible values for "--target" option;
Gets rid of the confused strings like "Suspend-to-RAM";
Emphasises the node *has to* be suspended in the time duration
specified by "--duration". And rewords the entire document a
bit according to the API's implementation and document.
Michael Chapman [Wed, 11 Dec 2013 08:07:45 +0000 (19:07 +1100)]
virtlockd: make re-exec more robust
- Use $XDG_RUNTIME_DIR for re-exec state file when running unprivileged.
- argv[0] may not contain a full path to the binary, however it should
contain something that can be looked up in the PATH. Use execvp() to
do path lookup on re-exec.
- As per list discussion [1], ignore --daemon on re-exec.
Bing Bu Cao [Thu, 16 Jan 2014 08:18:09 +0000 (16:18 +0800)]
linuxNodeGetCPUStats: Correctly handle cpu prefix
To retrieve node cpu statistics on Linux system, the
linuxNodeGetCPUstats function simply uses STRPREFIX() to match the cpuid
with the one read from /proc/stat. However, as the file is read line by
line it may happen, that some CPUs share the same prefix. So if user
requested stats for the first CPU, which is offline, then there's no
cpu1 in the stats file so the one that we match is cpu10. Which is
obviously wrong. Fortunately, the IDs are terminated by a space, so we
can utilize that.
Signed-off-by: Bing Bu Cao <mars@linux.vnet.ibm.com>
$ ./configure --prefix=$HOME/usr/libvirt-git
$ make install
results in libvirt trying to install in /usr/lib/wireshark/plugins/....
with predictable amounts of fail. The configure script should not be
hardcoding /usr/lib by default but rather honour $libdir
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
SCSI passthrough disks (<disk .. device="lun">) can't be used as backing
for snapshots. Currently with upstream qemu the vm crashes on such
attempt.
This patch adds a early check to catch an attempt to do such a snapshot
and rejects it right away. qemu will fix the issue but this will let us
control the error message.
Laine Stump [Fri, 17 Jan 2014 12:11:58 +0000 (14:11 +0200)]
build: add $(prefix) to SYSTEMD_UNIT_DIR
I noticed this problem when adding systemd support to netcf, because I
setup the configure.ac to automatically prefer using systemd over
initscripts when possible - although I had copied the
install-data-local target from the example of libvirt's
"libvirt-guests" service more or less verbatim, "make distcheck" would
fail because it was trying to install the service file directly into
/lib/systemd/system rather than into
/home/user/some/unimportant/name/lib/systemd/system.
This is caused by the install/uninstall rules for the systemd unit
files relying on $(DESTDIR) pointing the installed files to the right
place, but in reality $(DESTDIR) is empty during this part of make
distcheck - it instead sets $(prefix) with the toplevel directory used
for its test build/install/uninstall cycle.
(This problem hasn't been seen when running "make distcheck" in
libvirt because libvirt will never build/install systemd support
unless explicitly told to do so on the configure commandline, and
"make distcheck" doesn't put the "--with-initscript=..." option on the
configure commandline.)
I verified that the same problem does exist in libvirt by modifying
libvirt's configure.ac to set:
init_systemd=yes
with_init_script=systemd+redhat
This forces a build/install of the systemd unit files during
distcheck, which yields an error like this:
After adding $(prefix) to all the definitions of SYSTEMD_UNIT_DIR,
make distcheck now completes successfully with the modified
configure.ac, and the above lines change to something like this:
Peter Krempa [Mon, 16 Dec 2013 15:09:34 +0000 (16:09 +0100)]
qemu: snapshot: Avoid libvirtd crash when qemu crashes while snapshotting
We shouldn't access the domain definition while we are in the monitor
section as the domain is unlocked. Additionally after we exit from the
monitor we need to check if the VM is still alive. Not doing so resulted
in a crash if qemu exits while attempting to do an external VM snapshot.
Francesco Romani [Thu, 16 Jan 2014 16:11:15 +0000 (17:11 +0100)]
spice: expose the QEMU disable file transfer option
spice-server offers an API to disable file transfer messages
on the agent channel between the client and the guest.
This is supported in qemu through the disable-agent-file-xfer option.
This patch exposes this option to libvirt.
Adds a new element 'filetransfer', with one property,
'enable', which accepts a boolean.
Default is enabled, for backward compatibility.
Depends on the capability exported in the first patch of the series.
Signed-off-by: Francesco Romani <fromani@redhat.com>
Francesco Romani [Thu, 16 Jan 2014 16:11:14 +0000 (17:11 +0100)]
spice: detect if qemu can disable file transfer
spice-server offers an API to disable file transfer messages
on the agent channel between the client and the guest.
This is supported in qemu through the disable-agent-file-xfer option.
This patch detects if QEMU supports this option, and add
a capability if does.
Signed-off-by: Francesco Romani <fromani@redhat.com>
This is useful in certain circumstances, for example when
libvirtd is being executed by FreeBSD rc script, it cannot find
dmidecode installed from FreeBSD ports because it doesn't have
/usr/local (default prefix for ports) in PATH.
Introduce Wireshark dissector plugin which adds support to Wireshark
for dissecting libvirt RPC protocol.
Added following files to build Wireshark dissector from libvirt source
tree.
* tools/wireshark/*: Source tree of Wireshark dissector plugin.
Added followings to configure.ac or Makefile.am.
configure.ac
* --with-wireshark-dissector: Enable support for building Wireshark
dissector.
* --with-ws-plugindir: Specify wireshark plugin directory that dissector
will installed.
* Added tools/wireshark/{Makefile,src/Makefile} to AC_CONFIG_FILES.
Makefile.am
* Added tools/wireshark/ to SUBDIR.
If none (KVM, VFIO) of the supported PCI passthrough methods is known to
work on a host, it's better to fail right away with a nice error message
rather than letting attachment fail with a more cryptic message such as
Failed to bind PCI device '0000:07:05.0' to vfio-pci: No such device
Since commit v0.9.0-47-g4e8969e (released in 0.9.1) some failures during
device detach were reported to callers of virPCIDeviceBindToStub as
success. For example, even though a device seemed to be detached
When a PCI device is not bound to any driver, reattach should just
trigger driver probe rather than failing with
Invalid device 0000:00:19.0 driver file
/sys/bus/pci/devices/0000:00:19.0/driver is not a symlink
While virPCIDeviceGetDriverPathAndName was documented to return success
and NULL driver and path when a device is not attached to any driver but
didn't do so. Thus callers could not distinguish unbound devices from
failures.
Gao feng [Wed, 11 Dec 2013 08:29:50 +0000 (16:29 +0800)]
blkio: Setting throttle blkio cgroup for domain
This patch introduces virCgroupSetBlkioDeviceReadIops,
virCgroupSetBlkioDeviceWriteIops,
virCgroupSetBlkioDeviceReadBps and
virCgroupSetBlkioDeviceWriteBps,
we can use these interfaces to set up throttle
blkio cgroup for domain.
This patch also adds the new throttle blkio cgroup
elements to the test xml.
Gao feng [Wed, 11 Dec 2013 08:29:49 +0000 (16:29 +0800)]
domain: introduce xml elements for throttle blkio cgroup
This patch introduces new xml elements under <blkiotune>,
we use these new elements to setup the throttle blkio
cgroup for domain. The new blkiotune node looks like this:
When starting up a domain, the SELinux labeling is done depending on
current configuration. If the labeling fails we check for possible
causes, as not all labeling failures are fatal. For example, if the
labeled file is on NFS which lacks SELinux support, the file can still
be readable to qemu process. These cases are distinguished by the errno
code: NFS without SELinux support returns EOPNOTSUPP. However, we were
missing one scenario. In case there's a read-only disk on a read-only
NFS (and possibly any FS) and the labeling is just optional (not
explicitly requested in the XML) there's no need to make the labeling
error fatal. In other words, read-only file on read-only NFS can fail to
be labeled, but be readable at the same time.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Eric Blake [Tue, 14 Jan 2014 21:20:59 +0000 (14:20 -0700)]
maint: simplify driver registration at startup
We had a lot of repetition of errors that would occur if we
ever register too many drivers; this is unlikely to occur
unless we start adding a lot of new hypervisor modules, but
if it does occur, it's better to have uniform handling of the
situation, so that a one-line change is all that would be
needed if we decide that an internal error is not the best.
* src/libvirt.c (virDriverCheckTabMaxReturn): New define.
(virRegister*Driver): Use it for less code duplication.
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