The motivation for this API is that management layers that use libvirt
usually poll for statistics using various split up APIs we currently
provide. To get all the necessary stuff, the app needs to issue a lot of
calls and aggregate the results.
The APIs I'm introducing here:
1) Returns data in a format that we can expand in the future and is
(pseudo) hierarchical. The data is returned as typed parameters where
the fields are constructed as dot-separated strings containing names and
other stuff in a list of typed params.
2) Stats for multiple (all) domains can be queried at once and are
returned in one call. This will decrease the overhead necessary to issue
multiple calls per domain multiplied by the count of domains.
3) Selectable (bit mask) fields in the returned format. This will allow
to retrieve only specific stats according to the app's need.
The stats groups will be enabled using a bit field @stats passed as the
function argument. A few sample stats groups that this API will support:
VIR_DOMAIN_STATS_STATE
VIR_DOMAIN_STATS_CPU
VIR_DOMAIN_STATS_BLOCK
VIR_DOMAIN_STATS_INTERFACE
(Note that this is only an example, the initial implementation supports
only VIR_DOMAIN_STATS_STATE while others will be added later.)
the returned typed params will use the following scheme
state.state = VIR_DOMAIN_RUNNING
state.reason = VIR_DOMAIN_RUNNING_BOOTED (the actual values according to
the enum)
cpu.count = 8
cpu.0.state = running
cpu.0.time = 1234
According to docs/schemas/domaincommon.rng and _virDomainBlockIoTuneInfo
all the iotune values are interpreted as unsigned long long, however
according to qemu_monitor_json.c, qemu silently truncates numbers
larger than LLONG_MAX. There's really not much of a usage for such
large numbers anyway yet. This patch provides the same overflow
check during a domain start as it does during setting
a blkdeviotune element in qemu_driver.c and thus reports an error when
a larger number than LLONG_MAX is detected.
https://bugzilla.redhat.com/show_bug.cgi?id=1131876
QEMU 2.1 added support for the kvm=off option to the -cpu command,
allowing the KVM hypervisor signature to be hidden from the guest.
This enables disabling of some paravirualization features in the
guest as well as allowing certain drivers which test for the
hypervisor to load. Domain XML syntax is as follows:
<domain type='kvm>
...
<features>
...
<kvm>
<hidden state='on'/>
</kvm>
</features>
...
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Commit b55cc5f4e did a shallow copy of libxl_{sdl,vnc}_info from the
domain config to the build info, which resulted in double-freeing
strings contained in the structures during cleanup, which later
resulted in a libvirtd crash. Fix by performing a deep copy of the
structure, VIR_STRDUP'ing embedded strings instead of simply copying
their pointers.
Fixes the following issue reported on the libvirt dev list
https://www.redhat.com/archives/libvir-list/2014-August/msg01112.html
I noticed a line 'int nparams = 0;;' in remote_dispatch.h, and
tracked down where it was generated. While at it, I found a
couple of other double semicolons. Additionally, I noticed that
commit df0b57a95 left a stale reference to the file name
remote_dispatch_bodies.h.
* src/conf/numatune_conf.c (virDomainNumatuneNodeParseXML): Drop
empty statement.
* tests/virdbustest.c (testMessageStruct, testMessageSimple):
Likewise.
* src/rpc/gendispatch.pl (remote_dispatch_bodies.h): Likewise, and
update stale comments.
Signed-off-by: Eric Blake <eblake@redhat.com>
RHEL 5 is based on libvirt 0.8.2, as was Fedora 13. RHEL 5 also
happens to be the oldest box that we actively support with a
buildbot, so it is time to clean up some crufty conditionals in
the spec file that no longer are necessary for modern Fedora.
Although it is probably okay to make further simplifications to
a newer minimum Fedora version, that can be done as a later patch.
This patch just focuses on cleaning any comparison of %{?fedora}
that will always be true or false once we assume a minimum of F13.
* libvirt.spec.in: Make with_audit default to on. Move other
conditionals to a single RHEL-5 block. Simplify any fedora
comparison older than 13. Document our assumptions.
Signed-off-by: Eric Blake <eblake@redhat.com>
Introduce by 63fbcc692.
When start libvirtd with commandline "/usr/sbin/libvirtd -d -l -v",
we expect verbose(info level) log if neither environment variable
nor config file about logging controls is set. But in fact we can't
get any info priority log in the default output file.
The log priority of default output is VIR_LOG_DEFAULT(VIR_LOG_WARN),
so the info log is filtered out.
To record info priority log we must parse option -v before setting the
default output.
After this patch, we get all verbose log in the default output file.
Signed-off-by: Zhou Yimin <zhouyimin@huawei.com>
When trying to set an invalid value into iotune element, standard
behavior was to not report any error, rather to reset all affected
subelements of the iotune element back to 0 which results in ignoring
those particular subelements by XML generator. Patch further
examines the return code of the virXPathULongLong function
and in case of an invalid non-integer value raises an error.
Fixed to preserve consistency with invalid value checking
of other elements.
Resolves https://bugzilla.redhat.com/show_bug.cgi?id=1131811
The commit "f5b4c141" introduced new "force" parameter
for "virFDStreamOpenFileInternal" but forget to update
one call of that function.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
virStorageBackendVolDownloadLocal and virStorageBackendVolUploadLocal
use virFDStreamOpenFile function to work with the volume fd.
virFDStreamOpenFile calls virFDStreamOpenFileInternal that implements
handling of the non-blocking I/O. If a file is not a character device and
not a fifo, it uses libvirt_iohelper.
On FreeBSD, it doesn't work as expected because disk devices (including
ZFS volumes) are exposed as character devices, and ZFS volumes do not
support open(2) with O_NONBLOCK.
To overcome this, introduce a forceIOHelper flag to
virFDStreamOpenFileInternal that forces using libvirt_iohelper. And
introduce virFDStreamOpenBlockDevice that calls
virFDStreamOpenFileInternal with the forceIOHelper set to true.
virFDStreamOpenInternal terminates if virSetNonBlock fails. As
virSetNonBlock uses gnulib's set_nonblocking_flag that sets errno,
call virReportSystemError() to let user know the reason of fail.
Commit b606bbb41 reminded me that any time we drop locks to run
back-to-back guest interaction commands, we have to check that
the guest didn't disappear in between the two commands. A quick
audit found a couple of spots that were missing this check.
* src/qemu/qemu_driver.c (qemuDomainShutdownFlags)
(qemuDomainSetVcpusFlags): Check that domain is still up.
Signed-off-by: Eric Blake <eblake@redhat.com>
Since '337a13628' - Coverity complains that 'net' is VIR_ALLOC()'d, but
on various 'cleanup' exit paths from the code there is no corresponding
cleanup.
Since '1b807f92d' - Coverity complains that in the error paths of
both virFork() and virProcessWait() that the 'passfd' will not be closed.
Added the VIR_FORCE_CLOSE(passfd) and initialized it to -1.
Also noted that variable 'buf' was never really used - so I removed it
When trying to set numatune mode directly using virsh numatune command,
correct error is raised, however numatune structure was not deallocated,
thus resulting in creating an empty numatune element in the guest XML,
if none was present before. Running the same command aftewards results
in a successful change with broken XML structure. Patch fixes the
deallocation problem as well as checking for invalid attribute
combination VIR_DOMAIN_NUMATUNE_PLACEMENT_AUTO + a nonempty nodeset.
Resolves https://bugzilla.redhat.com/show_bug.cgi?id=1129998
The 'min_guarantee' is used by VMware ESX and OpenVZ drivers,
with qemu however, libvirt should report error when starting a domain,
because this element is not used.
Resolves https://bugzilla.redhat.com/show_bug.cgi?id=1122455
On some places in the libvirt code we have:
f(a,z)
instead of
f(a, z)
This trivial patch fixes couple of such occurrences.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Libvirt measures vram in Kbytes, not in bytes, so calculation
of Mbytes was incorrect. PCS server can take vram argument
with units, so I added K postfix to make params a little bit clearer.
That sets a new flag, but that flag does mean the child will get
LISTEN_FDS and LISTEN_PID environment variables properly set and
passed FDs reordered so that it corresponds with LISTEN_FDS (they must
start right after STDERR_FILENO).
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
Even line like this:
int asdf = i - somevar;
was matched by the regex, so this patch adds '=' to the list of
characters that break the regexp.
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
It's just a wrapper around NewFD and NewUNIX that selects the right
option and increments the number of used FDs.
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
Since not only systemd can do this (we'll be doing it as well few
patches later), change 'systemd' to 'caller' and fix LISTEN_FDS to
LISTEN_PID where applicable.
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
When formatting the forward mode addresses or interfaces the switch was
done based on the type of the network rather than of the type of the
individual <interface>/<address> element. In case a user would specify
an incorrect network type ("passhtrough") with <address> elements,
libvirtd would crash as it would attempt to format an <interface>.
Use the type of the individual element to format the XML.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1132347
https://bugzilla.redhat.com/show_bug.cgi?id=1078126
Using 'virsh attach-device --config' (or --persistent) to attach a
file backed lun device will succeed; however, subsequent domain restarts
will result in failure because the configuration of a file backed lun
is not supported.
Although allowing 'illegal configurations' is something that can be
allowed, it may not be practical in this case. Generally, when attaching
a device to a domain means the domain must be running. A way around
this is using the --config (or --persistent) option. When an attach
is done to a running domain, a temporary configuration is modified
first followed by the live update. The live update will make a number
of disk validity checks when building the qemu command to attach the
disk. If any fail, then change is rejected.
Rather than allow a potentially illegal combination, adjust the code
in the configuration path to make the same checks as the running path
will make with respect to disk validity checks. This way we avoid
having the potential for some subsequent start/reboot to fail because
an illegal combination was allowed.
NB: The live path still checks the configuration since it is possible
to just do --live guest modification...
