The default memlock limit is 64k which is not enough to start a single
VM. The requirements for one VM are 12k, 8k for eBPF map and 4k for eBPF
program, however, it fails to create eBPF map and program with 64k limit.
By testing I figured out that the minimal limit is 80k to start a single
VM with functional eBPF and if I add 12k I can start another one.
This leads into following calculation:
80k as memlock limit worked to start a VM with eBPF which means there
is 68k of lock memory that I was not able to figure out what was using
it. So to get a number for 4096 VMs:
68 + 12 * 4096 = 49220
If we round it up we will get 64M of memory lock limit to support 4096
VMs with default map size which can hold 64 entries for devices.
This should be good enough as a sane default and users can change it if
the need to.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1807090
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Whenever there is a guest CPU configured in domain XML, we will call
some CPU driver APIs to validate the CPU definition and check its
compatibility with the hypervisor. Thus domains with guest CPU
specification can only be started if the guest architecture is supported
by the CPU driver. But we would add a default CPU to any domain as long
as QEMU reports it causing failures to start any domain on affected
architectures.
https://bugzilla.redhat.com/show_bug.cgi?id=1805755
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
While our code can detect ISO as a separate format, qemu does not use it
as such and just passes it through as raw. Add conversion for detected
parts of the backing chain so that the validation code does not reject
it right away.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Include virutil.h in all files that use it,
instead of relying on it being pulled in somehow.
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Historically, this file was a dump for most of our helper
functions and needed almost everywhere.
With the introduction of virfile.h and virstring.h,
and more importantly, virenum.h and the introduction
of GLib, that is no longer true.
Remove its include from C files that don't even use it.
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Both callers pass false. Since we frown upon format probing, remove the
unused possibility to do the probing.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
The backend name is memory-backend-memfd but we've been checking
for memory-backend-memory.
Reported by GCC on rawhide:
../../../src/internal.h:75:22: error: 'strcmp' of a string of length 21 and
an array of size 21 evaluates to nonzero [-Werror=string-compare]
../../../src/qemu/qemu_command.c:3525:20: note: in expansion of macro 'STREQ'
3525 | } else if (STREQ(backendType, "memory-backend-memory") &&
| ^~~~~
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Fixes: 24b74d187c
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Another vircgroup helper to avoid code repetition between
the LXC and QEMU driver.
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
lxcDomainSetMemoryParameters() and qemuDomainSetMemoryParameters()
has duplicated chunks of code that can be put in a new
helper.
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
This new helper avoids more code repetition inside
lxcDomainSetBlkioParameters() and qemuDomainSetBlkioParameters().
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
After the introduction of virDomainDriverMergeBlkioDevice() in a
previous patch, it is now clear that lxcDomainSetBlkioParameters() and
qemuDomainSetBlkioParameters() uses the same loop to set cgroup
blkio parameter of a domain.
Avoid the repetition by adding a new helper called
virDomainCgroupSetupDomainBlkioParameters().
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
lxcDomainParseBlkioDeviceStr() and qemuDomainParseBlkioDeviceStr()
are the same function. Avoid code repetition by putting the code
in a new helper.
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
lxcDomainMergeBlkioDevice() and qemuDomainMergeBlkioDevice()
are the same functions. This duplicated code can't be put in
the existing domain_cgroup.c since it's not cgroup related.
This patch introduces a new src/hypervisor/domain_driver.c to
host this more generic code that can be shared between virt
drivers. This new file is then used to create a new helper
called virDomainDeivceMergeBlkioDevice() to eliminate the code
repetition mentioned above. Callers in LXC and QEMU files
were updated.
This change is a preliminary step for more code reduction of
cgroup related code inside lxcDomainSetBlkioParameters() and
qemuDomainSetBlkioParameters().
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
qemuSetupCgroupVcpuBW() and lxcSetVcpuBWLive() shares the
same code to set CPU CFS period and quota. This code can be
moved to a new virCgroupSetupCpuPeriodQuota() helper to
avoid code repetition.
A similar code is also executed in virLXCCgroupSetupCpuTune(),
but without the rollback on error. Use the new helper in this
function as well since the 'period' rollback, if not a
straight improvement for virLXCCgroupSetupCpuTune(), is
benign. And we end up cutting more code repetition.
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
The code that calls virCgroupSetCpuShares() and virCgroupGetCpuShares()
is repeated in 4 different places. Let's put it in a new
virCgroupSetupCpuShares() to avoid code repetition.
There's a reason of why we execute a Get in the same value we
just executed Set, explained in detail by commit 97814d8ab3.
Let's add a gist of the reasoning behind it as a comment in
this new function as well.
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
The code from qemuSetupCgroupCpusetCpus() and virLXCCgroupSetupCpusetTune()
can be centralized in a new helper called virCgroupSetupCpusetCpus().
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
virLXCCgroupSetupMemTune() and qemuSetupMemoryCgroup() shares
duplicated code that can be put in a new helper to avoid
code repetition.
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
There is duplicated code between virt drivers that needs to
be moved to avoid code repetition. In the case of duplicated
code between lxc_cgroup.c and qemu_cgroup.c a common place
would be utils/vircgroup.c. The problem is that this would
introduce /conf related definitions that shouldn't be imported
to vircgroup.c, which is supposed to be a place for utilitary
cgroups functions only. And syntax-check would forbid it anyway
due to cross-directory includes being used.
An alternative would be to overload domain_conf.c, which already
contains all the definitions required. But that file is already
crowded with XML handling code and we wouldn't do any favors to
it by putting more utilitary, non-XML parsing/formatting code
there.
In [1], Cole suggested a 'domain_cgroup' file to host common code
between lxc_cgroup and qemu_cgroup, and Daniel suggested a
'src/hypervisor' dir to host these type of files. This patch
introduces src/hypervisor/domain_cgroup.c and, to get started,
introduces a new virDomainCgroupSetupBlkio() function to host shared
code between virLXCCgroupSetupBlkioTune() and qemuSetupBlkioCgroup().
[1] https://www.redhat.com/archives/libvir-list/2019-December/msg00817.html
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
There are code repetition of set() and get() blkio device
parameters across lxc and qemu files. Use the new vircgroup
helpers to trim the repetition a bit.
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
This setting can be updating very easily on an already active
interface by just changing it in sysfs. If the bridge used for
connection is also changed, there is no need to separately update it,
because the new setting isf done as a part of connecting to the bridge
anyway.
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
This patch pushes the isolatedPort setting from the <interface> down
all the way to the callers of virNetDevBridgeAddPort(), and sets
BR_ISOLATED on the port (using virNetDevBridgePortSetIsolated()) after
the port has been successfully added to the bridge.
Signed-off-by: Laine Stump <laine@redhat.com>
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Not only was the original error code destroyed in the case of
encountering an error during recovery from a failed attach to the
bridge (and then *that* error was destroyed by logging a *second*
error about the failure to recover - virNetDevBridgeAddPort() already
logs an error, so the one about failing to recover was redundant), but
if the recovery was successful, the function would then return success
to the caller even though it had failed.
Fixes: 2711ac8716
(overwritten errors were introduced along with this functionality)
Fixes: 6bde0a1a37
(the wrong return value was introduced by a refactor)
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Firstly, the check for disk I/O error can be moved into 'if
(!offline)' section a few lines below.
Secondly, checks for vmstate and slirp should be moved under the
same section because they reflect live state of a domain. For
offline migration no QEMU is involved and thus these restrictions
are not valid.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
In two places where virPidFileForceCleanupPath() is called, we
try to unlink() the pidfile again. This is needless because
virPidFileForceCleanupPath() has done just that.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
qemuMonitorGetIOThreads returns a NULL-terminated list even when 0
iothreads are present. The caller didn't perform cleanup if there were 0
iothreads leaking the array.
https://bugzilla.redhat.com/show_bug.cgi?id=1804548
Fixes: d1eac92784
Reported-by: Jing Yan <jiyan@redhat.com>
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
QoS 'floor' setting is documented to be only supported for interfaces of
type 'network'. Fail with an error message on attempt to set 'floor' on
an interface of any other type.
Signed-off-by: Pavel Mores <pmores@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Implement support for the slice of type 'storage' which allows to set
the offset and size which modifies where qemu should look for the start
of the format container inside the image.
Since slicing is done using the 'raw' driver we need to add another
layer into the blockdev tree if there's any non-raw image format driver
used to access the data.
This patch adds the blockdev integration and setup of the image data so
that we can use the slices for any backing image.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
When creating overlay images e.g. for snapshots or when merging
snapshots we often specify the backing store string to use. Make the
formatter aware of backing chain entries which have a <slice>
configured so that we record it properly. Otherwise such images
would not work without the XML (when detecting the backing chain).
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
The storage slice will require a specific node name in cases when the
image format is not raw. Store and format them in the status XML.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Specifically creating such images via libvirt during blockjobs would
be much more hassle than it's worth. Just forbid them for now.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
We support explicit storage slices only when using blockdev. Storage
slices expressed via the backing store string are left to qemu to
open correctly.
Reject storage slices configured via the XML for non-blockdev usage.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
If we have a 'format' type slice for a raw driver we can directly format
the values.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
If a domain has a NVMe disk it already has the access configured.
Trying to configure it again on a commit or some other operation
is wrong and condemned to failure.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Its behavior is controlled by a KVM-specific CPU feature.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Masayoshi Mizuma <m.mizuma@jp.fujitsu.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Its use is limited to certain guest types, and it only supports
a subset of all possible tick policies.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Masayoshi Mizuma <m.mizuma@jp.fujitsu.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
This new timer model will be used to control the behavior of the
virtual timer for KVM ARM/virt guests.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Masayoshi Mizuma <m.mizuma@jp.fujitsu.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
We will use this capability to detect whether the QEMU binary
supports the kvm-no-adjvtime CPU feature.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Masayoshi Mizuma <m.mizuma@jp.fujitsu.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Make sure we are taking all possible virDomainTimerNameType values
into account. This will make upcoming changes easier.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Masayoshi Mizuma <m.mizuma@jp.fujitsu.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Libvirt switched to using a UNIX socket for monitors in
2009 for version 0.7.0. It seems unlikely that there is
a running QEMU process that hasn't been restarted for
11 years while also taking a libvirt upgrade. Therefore
we can drop support for opening a PTY for the QEMU
monitor.
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
My original implementation was completely broken because it attempted to
use object-add/del instead of blockdev-add/del.
https://bugzilla.redhat.com/show_bug.cgi?id=1798366
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Modify qemuMonitorBlockdevAdd so that it takes a double pointer for the
@props argument so that it's cleared inside the call. This allows
writing cleaner callers.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Use automatic variable freeing and get rid of the cleanup section.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Use automatic variable freeing and get rid of the cleanup section.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Few switch cases returned failure but didn't report an error. For a
situation when the backingStore type='volume' was not translated the
following error would occur:
$ virsh start VM
error: Failed to start domain VM
error: An error occurred, but the cause is unknown
After this patch:
$ virsh start VM
error: Failed to start domain VM
error: internal error: storage source pool 'tmp' volume 'pull3.qcow2' is not translated
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
We call APIs that reset the error in the rollback code.
Preserve the error from the original call that failed.
This turns the boringly cryptic:
error: Unable to set interface parameters
error: An error occurred, but the cause is unknown
to the unexpectedly anarchist:
error: internal error: Child process (/usr/sbin/tc filter add
dev vnet1 parent ffff: protocol all u32 match u32 0 0 police
rate 4294968kbps burst 4294968kb mtu 64kb drop flowid :1)
unexpected exit status 1: Illegal "rate"
Illegal "police"
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Fixes: f02e21cb33https://bugzilla.redhat.com/show_bug.cgi?id=1800505
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Otherwise an attempt to set an invalid value:
virsh domiftune rhel8.2 vnet0 --outbound 4294968
on an interface with no bandwidth set crashes.
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Fixes: f02e21cb33https://bugzilla.redhat.com/show_bug.cgi?id=1800505
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
This deletes all trace of gnulib from libvirt. We still
have the keycodemapdb submodule to deal with. The simple
solution taken was to update it when running autogen.sh.
Previously gnulib could auto-trigger refresh when running
'make' too. We could figure out a solution for this, but
with the pending meson rewrite it isn't worth worrying
about, given how infrequently keycodemapdb changes.
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Pvpanic device supports bit 1 as crashloaded event, it means that
guest actually panicked and run kexec to handle error by guest side.
Handle crashloaded as a lifecyle event in libvirt.
Test case:
Guest side:
before testing, we need make sure kdump is enabled,
1, build new pvpanic driver (with commit from upstream
e0b9a42735f2672ca2764cfbea6e55a81098d5ba
191941692a3d1b6a9614502b279be062926b70f5)
2, insmod new kmod
3, enable crash_kexec_post_notifiers,
# echo 1 > /sys/module/kernel/parameters/crash_kexec_post_notifiers
4, trigger kernel panic
# echo 1 > /proc/sys/kernel/sysrq
# echo c > /proc/sysrq-trigger
Host side:
1, build new qemu with pvpanic patches (with commit from upstream
600d7b47e8f5085919fd1d1157f25950ea8dbc11
7dc58deea79a343ac3adc5cadb97215086054c86)
2, build libvirt with this patch
3, handle lifecycle event and trigger guest side panic
# virsh event stretch --event lifecycle
event 'lifecycle' for domain stretch: Crashed Crashloaded
events received: 1
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: zhenwei pi <pizhenwei@bytedance.com>
Starting a KVM domain on s390 with old machine type (such as
s390-ccw-virtio-2.5) and without any guest CPU model configured fails
with
CPU models are not available: KVM doesn't support CPU models
QEMU error. This is cause by libvirt using host-model CPU as the default
CPU based on QEMU reporting "host" CPU model as being the default one
(see commit v5.9.0-402-g24d8202294: qemu: Use host-model CPU on s390 by
default). However, even though both QEMU and KVM support CPU models on
s390 and QEMU can give us the host-model CPU, we can't use it with old
machine types which only support -cpu host.
https://bugzilla.redhat.com/show_bug.cgi?id=1795651
Reported-by: Christian Ehrhardt <paelzer@gmail.com>
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
The usability of a specific CPU mode may depend on machine type, let's
prepare for this by passing it to virQEMUCapsIsCPUModeSupported.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Extend QEMU with tpm-spapr support. Assign a device address to the
vTPM device model.
Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Extend the QEMU capabilties with tpm-spapr support.
Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Signed-off-by: Ján Tomko <jtomko@redhat.com>
This patch adds support for the tpm-spapr device model for ppc64. The XML for
this type of TPM looks as follows:
<tpm model='tpm-spapr'>
<backend type='emulator'/>
</tpm>
Extend the documentation.
Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Introduce VIR_DOMAIN_TPM_MODEL_DEFAULT as a default model which we use
in case the user does not provide a model in the device XML. It has
the TIS's previous value of '0'. In the post parsing function
we change this default value to 'TIS' to have the same model as before.
Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Signed-off-by: Ján Tomko <jtomko@redhat.com>
All our supported Linux distros now have this header.
It has never existed on FreeBSD / macOS / Mingw.
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
This addreses portability to Windows and standardizes
error reporting. This fixes a number of places which
failed to set O_CLOEXEC or failed to report errors.
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Most code now uses the virProcess / virCommand APIs, so
the need for sys/wait.h is quite limited. Removing this
include removes the dependency on GNULIB providing a
dummy sys/wait.h for Windows.
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Use qemuBlockBitmapsHandleBlockcopy to calculate bitmaps to copy over
for a block-copy job.
We copy them when pivoting to the new image as at that point we are
certain that we don't dirty any bitmap unnecessarily.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Add a function calculating which bitmaps to copy to the mirror during
a block-copy operation.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Add a validator which checks that a bitmap spanning multiple backing
chain members doesn't look broken. The current rules are that no
intermediate birmaps are missing (unfortunately it's hard to know
whether the topmost or bottommost bitmap is missing) and none of the
components is inconsistent.
We can obviously improve it over time.
The validator is also tested against the existing bitmap data we have
for the backup merging test as well as some of the existing broken
bitmap synthetic test cases.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
The flags may control important aspects of the block job which may
influence also the termination of the job. Store the 'flags' for all
the block job types.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Add a variable which will store the contents of the 'flags' variable as
passed in by the individual block jobs. Since the flags may influence
behaviour of the jobs it's important to preserve them to the
finalization steps.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Use the glib allocation function that never returns NULL and remove the
now dead-code checks from all callers.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Create a wrapper for qemuBlockGetNamedNodeData named
qemuBlockGetNamedNodeData. The purpose of the wrapper is to integrate
the monitor handling functionality and in the future possible
qemuCaps-based flags.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Allow qemu access to modify backing files in case when we want to delete
a checkpoint.
This patch adds tracking of which images need to be relabelled when
calculating the transaction, the code to relabel them and rollback.
To verify that stuff works we also output the list of images to relabel
into the test case output files in qemublocktest.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Allow deleting of checkpoints when snapshots were created along. The
code tracks and modifies the checkpoint list so that backups can still
be taken with such a backing chain. This unfortunately requires to
rename few bitmaps (by copying and deleting them) in some cases.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
This requires stealing one cmd pointer before returning it.
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Mark eligible declarations as g_autofree and remove
the corresponding VIR_FREE calls.
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Always trim the full specified suffix.
All of the callers outside of tests were passing either
strlen or the actual length of the string.
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Now, that every use of virAtomic was replaced with its g_atomic
equivalent, let's remove the module.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
The rewrite to use GLib's atomic ops functions changed the behavior
of virAtomicIntInc - before it returned the pre-increment value.
Most of the callers using its value were adjusted, but the one
in qemuDriverAllocateID was not. If libvirtd would reconnect to
a running domain during startup, the next started domain would get
the same ID:
$ virsh list
Id Name State
--------------------------
1 f28live running
1 f28live1 running
Use the g_atomic_add function directly (as recommended in viratomic.h)
and add 1 to the result.
This also restores the usual numbering from 1 instead of 0.
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Fixes: 7b9645a7d1
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Starting on commit 1f43393283, qemuDomainFillDeviceIsolationGroup()
returns 0 in all circunstances. Let's turn it to 'void' make it
clearer that the function will not fail. This also spares a
check for < 0 return in qemu_hotplug.c. The
qemuDomainFillDeviceIsolationGroupIter() callback now returns
0 at all times - which is already happening anyway.
Refer to 1f43393283 commit message for more details on why
the function was changed to never return an error.
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
qemuDomainChrDefDropDefaultPath() returns an int, but it's
always returning 0. Callers are checking for result < 0 to
run their cleanup code needlessly.
Turn the function to 'void' and adjust the callers.
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Avoid some of the virObjectUnref() calls by using g_autoptr.
Aside from the 'cleanup' label in qemuDomainSetFakeReboot(),
all other now deprecated cleanup labels will be removed in
the next patch.
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Use g_autofree to remove VIR_FREE() calls used for cleanups.
Labels that became deprecated will be removed in a later
patch.
In qemuDomainSetupDisk(), the 'dst' variable is not used at
all and could be removed.
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
The 'caps' variable in qemuDomainObjPrivateXMLParseAutomaticPlacement()
is set to auto clean via g_autoptr(), but a 'virObjectUnref(caps)' is
being executed in the 'cleanup' label.
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
With -blockdev we must look up via the nodename rather than the 'drive'
alias which is not present any more.
This fixes the pre-creation of storage volumes on migration with
non-shared storage.
https://bugzilla.redhat.com/show_bug.cgi?id=1793263
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Swithc to the helper which doesn't require checking of the return value.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
The data is gathered only once so we can move the whole block which
fetches the data out of the loop and get rid of the logic which
prevents multiple calls.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Refactor the logic to skip the body of the function if there's nothing
to do.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
There are two calls to virHashNew which check the return value. It's not
necessary any more as virHashNew always returns a valid pointer.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Aside from itinerant error (actually warning) messages due to an
unrecognized response from qemu, this isn't even necessary - the
migration proceeds successfully to completion anyway.
(I'm not sure where to see this status reported in the API though - do
we need to add an extra state, or recognition of a new event somewhere?)
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Normally a PCI hostdev can't be migrated, so
qemuMigrationSrcIsAllowedHostdev() won't permit it. In the case of a a
hostdev network interface that has <teaming type='transient'/> set,
QEMU will automatically unplug the device prior to migration, and
re-plug a corresponding device on the destination. This patch modifies
qemuMigrationSrcIsAllowedHostdev() to allow domains with those devices
to be migrated.
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
The QEMU driver uses the <teaming type='persistent|transient'
persistent='blah'/> element to setup a "failover" pair of devices -
the persistent device must be a virtio emulated NIC, with the only
extra configuration being the addition of ",failover=on" to the device
commandline, and the transient device must be a hostdev NIC
(<interface type='hostdev'> or <interface type='network'> with a
network that is a pool of SRIOV VFs) where the extra configuration is
the addition of ",failover_pair_id=$aliasOfVirtio" to the device
commandline. These new options are supported in QEMU 4.2.0 and later.
Extra qemu-specific validation is added to ensure that the device
type/model is appropriate and that the qemu binary supports these
commandline options.
The result of this will be:
1) The virtio device presented to the guest will have an extra bit set
in its PCI capabilities indicating that it can be used as a failover
backup device. The virtio guest driver will need to be equipped to do
something with this information - this is included in the Linux
virtio-net driver in kernel 4.18 and above (and also backported to
some older distro kernels). Unfortunately there is no way for libvirt
to learn whether or not the guest driver supports failover - if it
doesn't then the extra PCI capability will be ignored and the guest OS
will just see two independent devices. (NB: the current virtio guest
driver also requires that the MAC addresses of the two NICs match in
order to pair them into a bond).
2) When a migration is requested, QEMu will automatically unplug the
transient/hostdev NIC from the guest on the source host before
starting migration, and automatically re-plug a similar device after
restarting the guest CPUs on the destination host. While the transient
NIC is unplugged, all network traffic will go through the
persistent/virtio device, but when the hostdev NIC is plugged in, it
will get all the traffic. This means that in normal circumstances the
guest gets the performance advantage of vfio-assigned "real hardware"
networking, but it can still be migrated with the only downside being
a performance penalty (due to using an emulated NIC) during the
migration.
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Presence of the virtio-net-pci option called "failover" indicates
support in a qemu binary of a simplistic bonding of a virtio-net
device with another PCI device. This feature allows migration of
guests that have a network device assigned to a guest with VFIO, by
creating a network bond device in the guest consisting of the
VFIO-assigned device and a virtio-net-pci device, then temporarily
(and automatically) unplugging the VFIO net device prior to migration
(and hotplugging an equivalent device on the migration
destination). (The feature is called "failover" because the bond
device uses the vfio-pci netdev for normal guest networking, but
"fails over" to the virtio-net-pci netdev once the vfio-pci device is
unplugged for migration.)
Full functioning of the feature also requires support in the
virtio-net driver in the guest OS (since that is where the bond device
resides), but if the "failover" commandline option is present for the
virtio-net-pci device in qemu, at least the qemu part of the feature
is available, and libvirt can add the proper options to both the
virtio-net-pci and vfio-pci device commandlines to indicate qemu
should attempt doing the failover during migration.
This patch just adds the qemu capabilities flag "virtio-net.failover".
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
There are a large number of different header files that
are related to the sockets APIs. The virsocket.h header
includes all of the relevant headers for Windows and UNIX
in one convenient place. If virsocketaddr.h is already
included, then there's no need for virsocket.h
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
This is a simplified variant of gnulib's passfd module
without the portability code that we do not require.
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Currently when disk is removed from iotune group (by setting
all tunables to zero) group name is leaved in config. Let's fix
it.
Given iotune defaults are taken from the destination group setting
tunables to zero may require different set of zero settings in API
call. Let's prohibit removing from group while specifying different
group name then current for the sanity sake.
Signed-off-by: Nikolay Shirokovskiy <nshirokovskiy@virtuozzo.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
For example if disk is not in the group and we want to move it
there then it makes sense to specify only the group name in API call.
Currently the destination group iotune settings will be overwritten
with the disk settings which I would say is not what one would expect.
Thus let's get defaults from the group we are moving to.
And if we are moving the brand new group then is makes sense to
copy the current disk iotune settings to the group.
Signed-off-by: Nikolay Shirokovskiy <nshirokovskiy@virtuozzo.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
virDomainSetBlockIoTune not simply sets the iotune params given in API
but use current settings for all the omitted params. Unfortunately
it uses current settings for active config when setting inactive
params. Let's fix it.
Signed-off-by: Nikolay Shirokovskiy <nshirokovskiy@virtuozzo.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Currently it is possible to start a domain which have disks
in same iotune group and at the same time having different iotune
params. Both params set are passed to qemu in command line and the one
that is passed later down command line is get actually set.
Let's prohibit such configurations.
Signed-off-by: Nikolay Shirokovskiy <nshirokovskiy@virtuozzo.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Currently upon successfull call to qemu's implementation of
virDomainSetBlockIoTune iotune settings are changed only for the
disk given in API if the disk is in iotune group while we need
to change the settings for all disks in the group.
Signed-off-by: Nikolay Shirokovskiy <nshirokovskiy@virtuozzo.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
And introduce virDomainBlockIoTuneInfoHasAny.
Signed-off-by: Nikolay Shirokovskiy <nshirokovskiy@virtuozzo.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
All the callees return either 0 or -1 so there is no need
for propagating the value. And we bail on the first error.
Remove the variable to make the function simpler.
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
We have a helper variable to make the code more concise,
use it consistently.
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Now that the cleanup section is empty, eliminate the cleanup
label as well as the 'ret' variable.
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Use the g_auto macros wherever possible to eliminate the cleanup
section.
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
The template still references libvirt-qemu-shim, which was at one
point the name used to refer to what we now know as virt-qemu-run.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
A recent commit added an error check for too-nested backing chains
followed by a return, even though errors above jump to cleanup.
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Fixes: b168fa88b8
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Andrea Bolognani <abologna@redhat.com>
Remove bogus G_GNUC_UNUSED attribute and add a missing space.
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Fixes: d600667278
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Andrea Bolognani <abologna@redhat.com>
The algorithm is used in two places to find the parent checkpoint object
which contains given disk and then uses data from the disk. Additionally
the code is written in a very non-obvious way. Factor out the lookup of
the disk into a function which also simplifies the callers.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
The function has no users now and there's no need for it as the common
pattern is to look up the whole disk object anyways.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
If a disk is unplugged and then the user tries to delete a checkpoint
the code would try to use NULL node name as it was not checked.
Fix this by fetching the whole disk definition object and verifying it
was found.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Lookup the whole disk definition rather than just the node name.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Upcoming patches will also use the domain disk definition. Rename disk
to chkdisk for clarity.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Upcoming patches will also use the domain disk definition. Rename disk
to chkdisk for clarity.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
qemuCheckpointDiscard is a massive function that can be separated into
smaller bits. Extract the part that actually modifies the disk from the
metadata handling.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Test code will need to know whether the virQEMUCaps object contains any
machine types already. Add a helper and expose it via 'qemu_capspriv.h'.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
The previous approac of just purging the alias combined with the fact
that we filled in fake machine types in the test data meant that if a
test case used an alias machine type such as 'pc' or 'q35' it would not
properly resolve to the actual data returned by qemu.
This started to be a problem since the CPU driver now looks at the
default CPU reported with the machine type.
This patch replaces the original approach of just removing the alias by
replacing it with a copy of the machine type data which the type would
alias to. This means that we are using the real data while we don't
modify the test output after every qemu upgrade.
Additionally this change will allow us to drop adding the fake machine
types later.
The test fallout is from actually excercising the CPU driver with
actual data.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Separate out the internals as they will become more complex soon.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Every supported qemu is able to return the list of machine types it
supports so we can start validating it against that list. The advantage
is a better error message, and the change will also prevent having stale
test data.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Debian/Ubuntu linkers are more strict that other distros requiring glib
to be linked explicitly.
macOS needs -export-dynamic instead of -Wl,--export-dynamic
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Similarly to 510d154a0b we need to prevent
doing too deeply nested backing chains and reject them with a sane error
message.
Add a loop to go through the snapshots prior to attempting actually
creating them to prevent some possible inconsistent scenarios.
We don't need to do it when reusing backing chains as we'll be
re-detecting the backing chain in that case anyways.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Don't adopt the backing store data when reusing images provided by the
user. This will force a backing chain re-probe as users might have
passed in something unexpected in the overlay where our view of the
backing chain would not correspond.
This is done only for inactive snapshots as there we have way less
verification.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
The previous "QEMU shim" proof of concept was taking an approach of only
caring about initial spawning of the QEMU process. It was then
registered with the libvirtd daemon who took over management of it. The
intent was that later libvirtd would be refactored so that the shim
retained control over the QEMU monitor and libvirt just forwarded APIs
to each shim as needed. This forwarding of APIs would require quite alot
of significant refactoring of libvirtd to achieve.
This impl thus takes a quite different approach, explicitly deciding to
keep the VMs completely separate from those seen & managed by libvirtd.
Instead it uses the new "qemu:///embed" URI scheme to embed the entire
QEMU driver in the shim, running with a custom root directory.
Once the driver is initialization, the shim starts a VM and then waits
to shutdown automatically when QEMU shuts down, or should kill QEMU if
it is terminated itself. This ought to use the AUTO_DESTROY feature but
that is not yet available in embedded mode, so we rely on installing a
few signal handlers to gracefully kill QEMU. This isn't reliable if
we crash of course, but you can restart with the same root dir.
Note this program does not expose any way to manage the QEMU process,
since there's no RPC interface enabled. It merely starts the VM and
cleans up when the guest shuts down at the end. This program is
installed to /usr/bin/virt-qemu-run enabling direct use by end users.
Most use cases will probably want to integrate the concept directly
into their respective application codebases. This standalone binary
serves as a nice demo though, and also provides a way to measure
performance of the startup process quite simply.
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
This enables support for running QEMU embedded to the calling
application process using a URI:
qemu:///embed?root=/some/path
Note that it is important to keep the path reasonably short to
avoid risk of hitting the limit on UNIX socket path names
which is 108 characters.
When using the embedded mode with a root=/var/tmp/embed, the
driver will use the following paths:
logDir: /var/tmp/embed/log/qemu
swtpmLogDir: /var/tmp/embed/log/swtpm
configBaseDir: /var/tmp/embed/etc/qemu
stateDir: /var/tmp/embed/run/qemu
swtpmStateDir: /var/tmp/embed/run/swtpm
cacheDir: /var/tmp/embed/cache/qemu
libDir: /var/tmp/embed/lib/qemu
swtpmStorageDir: /var/tmp/embed/lib/swtpm
defaultTLSx509certdir: /var/tmp/embed/etc/pki/qemu
These are identical whether the embedded driver is privileged
or unprivileged.
This compares with the system instance which uses
logDir: /var/log/libvirt/qemu
swtpmLogDir: /var/log/swtpm/libvirt/qemu
configBaseDir: /etc/libvirt/qemu
stateDir: /run/libvirt/qemu
swtpmStateDir: /run/libvirt/qemu/swtpm
cacheDir: /var/cache/libvirt/qemu
libDir: /var/lib/libvirt/qemu
swtpmStorageDir: /var/lib/libvirt/swtpm
defaultTLSx509certdir: /etc/pki/qemu
At this time all features present in the QEMU driver are available when
running in embedded mode, availability matching whether the embedded
driver is privileged or unprivileged.
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
The intent here is to allow the virt drivers to be run directly embedded
in an arbitrary process without interfering with libvirtd. To achieve
this they need to store all their configuration & state in a separate
directory tree from the main system or session libvirtd instances.
This can be useful for doing testing of the virt drivers in "make check"
without interfering with the user's own libvirtd instances.
It can also be used for applications using KVM/QEMU as a piece of
infrastructure to build an service, rather than for general purpose
OS hosting. A long standing example is libguestfs, which would prefer
if its temporary VMs did show up in the main libvirtd VM list, because
this confuses apps such as OpenStack Nova. A more recent example would
be Kata which is using KVM as a technology to build containers.
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
If a domain is configured to have an egl-headless display and a virtio
video device, virgl will be enabled automatically within the guest, even
if the video device is configured with accel3d='no'.
In this case we should explicitly pass 'virgl=off' to qemu.
See https://bugzilla.redhat.com/show_bug.cgi?id=1791236 for more
information.
Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Since v4.2-rc0, QEMU introduced a builtin rng backend that uses
getrandom() syscall to generate random. Add it to libvirt with the
backend model 'builtin'.
https://bugzilla.redhat.com/show_bug.cgi?id=1785091
Signed-off-by: Han Han <hhan@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
The 'builtin' rng backend model can be used as following:
<rng model='virtio'>
<backend model='builtin'/>
</rng>
Signed-off-by: Han Han <hhan@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
It is used to check if qemu is capable of rng-builtin object.
This object is added since qemu-4.2.0-rc0, commit 6c4e9d48.
Signed-off-by: Han Han <hhan@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Since v5.6.0-48-g270583ed98 we try to cache domain capabilities,
i.e. store filled virDomainCaps in a hash table in virQEMUCaps
for future use. However, there's a race condition in the way it's
implemented. We use virQEMUCapsGetDomainCapsCache() to obtain the
pointer to the hash table, then we search the hash table for
cached data and if none is found the domcaps is constructed and
put into the table. Problem is that this is all done without any
locking, so if there are two threads trying to do the same, one
will succeed and the other will fail inserting the data into the
table.
Also, the API looks a bit fishy - obtaining pointer to the hash
table is dangerous.
The solution is to use a mutex that guards the whole operation
with the hash table. Then, the API can be changes to return
virDomainCapsPtr directly.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1791790
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
When fixing [1] I've ran attached reproducer and had it spawn
1024 threads and query capabilities XML in each one of them. This
lead libvirtd to hit the RLIMIT_NOFILE limit which was kind of
expected. What wasn't expected was a subsequent segfault. It
happened because virCPUProbeHost failed and returned NULL. We've
taken the NULL and passed it to virCapabilitiesHostNUMARef()
which dereferenced it. Code inspection showed the same flas in
virQEMUDriverGetHostNUMACaps(), so I'm fixing both places.
1: https://bugzilla.redhat.com/show_bug.cgi?id=1791790
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Don't use ERANGE as it doesn't make much sense in the error message.
Also point out that the reply from qemu was too large which is not
obvious from the original error:
error: No complete monitor response found in 10485760 bytes: Numerical result out of range
The new message will read:
error: internal error: QEMU monitor reply exceeds buffer size (10485760 bytes)
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
libvirt treats 'luks' images as raw+encryption. The logic in
qemuBlockStorageSourceCreateFormat skipped the creation if the requested
image was raw but didn't take into account the encryption.
This manifested itself e.g. when attempting to do a virsh blockcopy with
the following XML:
<disk type='file' device='disk'>
<driver name='qemu' type='raw'/>
<source file='/tmp/enccpy'>
<encryption format='luks'>
<secret type='passphrase' uuid='0a81f5b2-8403-7b23-c8d6-21ccc2f80d6f'/>
</encryption>
</source>
</disk>
Where qemu would report the following error:
unable to execute QEMU command 'blockdev-add': Volume is not in LUKS format
rather than actually formatting the image first.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Use the user-configured name of the bitmap when merging the appropriate
bitmaps for an incremental backup so that the user can see it as
configured. Additionally expose the default bitmap name if nothing is
configured.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Pass the exportname as configured when exporting the image via NBD and
fill it with the default if it's not configured.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
When using blockdev configurations the 'device' argument of
'blockdev-commit' must correspond to the topmost node in the block node
graph. Libvirt didn't do this properly in case when 'copy_on_read'
option was enabled on the disk.
Use qemuDomainDiskGetTopNodename to fix it when calling block-commit.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
When using blockdev configurations the 'device' argument of
'blockdev-mirror' must correspond to the topmost node in the block node
graph. Libvirt didn't do this properly in case when 'copy_on_read'
option was enabled on the disk.
Use qemuDomainDiskGetTopNodename to fix it for the blockdev-mirror calls
in qemuDomainBlockCopy and the non-shared-storage migration.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
There are more places which require getting the topmost nodename to be
passed to qemu. Separate it out into a new function.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
If a mirror job fails to start in -blockdev mode we'd not unplug the
backing files we added first because the code on the error path checked
the wrong value. 'rc' is used as status of the code which added the
images, but the state of the 'block(dev)-mirror' call is stored in 'ret'
at that point.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
The virConnectGetDomainCapabilities API accepts either a binary path
to the emulator, or desired guest arch. If guest arch is not given,
then the host arch is assumed.
In the case where the binary is not given, the code tried to find the
emulator binary in the existing list of cached emulator capabilities.
This is not valid since we switched to lazy population of the cache in:
commit 3dd91af01f
Author: Daniel P. Berrangé <berrange@redhat.com>
Date: Mon Dec 2 13:04:26 2019 +0000
qemu: stop creating capabilities at driver startup
As a result of this change, if there are no persistent guests defined
using the requested guest architecture, virConnectGetDomainCapabilities
will fail to find an emulator binary.
The solution is to stop relying on the cached capabilities to find the
binary and instead use the same logic we use to pick default a binary
per arch when populating capabilities.
Tested-by: Boris Fiuczynski <fiuczy@linux.ibm.com>
Tested-by: Richard W.M. Jones <rjones@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
The "ps2" bus is only available on certain machines like x86. On
machines like s390x, we should refuse to add a device to this bus
instead of silently ignoring it.
Looking at the QEMU sources, PS/2 is only available if the QEMU binary
has the "i8042" device, so let's check for that and only allow "ps2"
devices if this QEMU device is available, or if we're on x86 anyway
(so we don't have to fake the QEMU_CAPS_DEVICE_I8042 capability in
all the tests that use <input ... bus='ps2'/> in their xml data).
Reported-by: Sebastian Mitterle <smitterl@redhat.com>
Buglink: https://bugzilla.redhat.com/show_bug.cgi?id=1763191
Signed-off-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
QEMU driver has two functions: qemuGetDHCPInterfaces() and
qemuARPGetInterfaces() that are being used inside only one single
function. They can be turned into generic functions that other drivers
can use. This commit move both from QEMU driver tree to domain conf
tree.
Signed-off-by: Julio Faracco <jcfaracco@gmail.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
The function virSecretGetSecretString calls into secret driver and is
used from other hypervisors drivers and as such makes more sense in
util.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
gmtime_r/localtime_r are mostly used in combination with
strftime to format timestamps in libvirt. This can all
be replaced with GDateTime resulting in simpler code
that is also more portable.
There is some boundary condition problem in parsing POSIX
timezone offsets in GLib which tickles our test suite.
The test suite is hacked to avoid the problem. The upsteam
GLib bug report is
https://gitlab.gnome.org/GNOME/glib/issues/1999
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
G_STATIC_ASSERT() is a drop-in functional equivalent of
the GNULIB verify() macro.
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Libvirt's original atomic ops impls were largely copied
from GLib's code at the time. The only API difference
was that libvirt's virAtomicIntInc() would return a
value, but g_atomic_int_inc was void. We thus use
g_atomic_int_add(v, 1) instead, though this means
virAtomicIntInc() now returns the original value,
instead of the new value.
This rewrites libvirt's impl in terms of g_atomic_int*
as a short term conversion. The key motivation was to
quickly eliminate use of GNULIB's verify_expr() macro
which is not a direct match for G_STATIC_ASSERT_EXPR.
Long term all the callers should be updated to use
g_atomic_int* directly.
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Switch from old VIR_ allocation APIs to glib equivalents.
Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
This function potentially grabs both a monitor job and an agent job at
the same time. This is problematic because it means that a malicious (or
just buggy) guest agent can cause a denial of service on the host. The
presence of this function makes it easy to do the wrong thing and hold
both jobs at the same time. All existing uses have already been removed
by previous commits.
Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
In order to avoid holding an agent job and a normal job at the same
time, we want to avoid accessing the domain's definition while holding
the agent job. To achieve this, qemuAgentGetFSInfo() only returns the
raw information from the agent query to the caller. The caller can then
release the agent job and then proceed to look up the disk alias from
the vm definition. This necessitates moving a few helper functions to
qemu_driver.c and exposing the agent data structure (qemuAgentFSInfo) in
the header.
In addition, because the agent function no longer returns the looked-up
disk alias, we can't test the alias within qemuagenttest. Instead we
simply test that we parse and return the raw agent data correctly.
Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
The qemuAgentDiskInfo structure is filled with information received from
the agent command response, except for the 'alias' field, which is
retrieved from the vm definition. Limit this structure only to data that
was received from the agent message.
This is another intermediate step in moving the responsibility for
searching the vmdef from qemu_agent.c to qemu_driver.c so that we can
avoid holding an agent job and a normal job at the same time.
Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
In an effort to avoid holding both an agent and normal job at the same
time, we shouldn't access the vm definition from within qemu_agent.c
(i.e. while the agent job is being held). In preparation, we need to
store the full filesystem disk information in qemuAgentDiskInfo. In a
following commit, we can pass this information back to the caller and
the caller can search the vm definition to match the filsystem disk to
an alias.
Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
The function name doesn't give a good idea of what the function does.
Rename to qemuAgentGetFSInfoFillDisks() to make it more obvious than it
is filling in the disk information in the fsinfo struct.
Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
QEMU since 4.1.0 supports the "dies" parameter for -smp
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Recently CPU hardware vendors have started to support a new structure
inside the CPU package topology known as a "die". Thus the hierarchy
is now:
sockets > dies > cores > threads
This adds support for "dies" in the XML parser, with the value
defaulting to 1 if not specified for backwards compatibility.
For example a system with 64 logical CPUs might report
<topology sockets="4" dies="2" cores="4" threads="2"/>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
When pause-before-switchover QEMU capability is enabled, we get STOP
event before MIGRATION event with postcopy-active state. To properly
handle post-copy migration and emit correct events commit
v4.10.0-rc1-4-geca9d21e6c added a hack to
qemuProcessHandleMigrationStatus which translates the paused state
reason to VIR_DOMAIN_PAUSED_POSTCOPY and emits
VIR_DOMAIN_EVENT_SUSPENDED_POSTCOPY event when migration state changes
to post-copy.
However, the code was effective on both sides of migration resulting in
a confusing VIR_DOMAIN_EVENT_SUSPENDED_POSTCOPY event on the destination
host, where entering post-copy mode is already properly advertised by
VIR_DOMAIN_EVENT_RESUMED_POSTCOPY event.
https://bugzilla.redhat.com/show_bug.cgi?id=1791458
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
When resuming a domain from a save file, we read the domain XML
from the file, add it onto our internal list of domains, start
the qemu process, let it load the incoming migration stream and
resume its vCPUs afterwards. If anything goes wrong, the domain
object is removed from the list of domains and error is returned
to the caller. However, the qemu process might be left behind -
if resuming vCPUs fails (e.g. because qemu is unable to acquire
write lock on a disk) then due to a bug the qemu process is not
killed but the domain object is removed from the list.
Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1718707
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
We have to keep the default - querying the agent if no flag is
set.
Signed-off-by: Julio Faracco <jcfaracco@gmail.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
libvirt currently always reports that USB is available as a bus subsystem
type when running "virsh domcapabilities". However, this is not always
true, for example the qemu-system-s390x binary normally never has support
for USB. Thus we should only report that USB is available if there is
also a USB host controller available where we can attach USB devices.
Reported-by: Sebastian Mitterle <smitterl@redhat.com>
Buglink: https://bugzilla.redhat.com/show_bug.cgi?id=1759849
Signed-off-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Historically there are two places where we format authentication and
encryption for a disk. The logich which formats it for backing files was
flawed though and didn't format it at all. This worked if the image
became a backing file through the means of a snapshot but not directly.
Force formatting of the source and encryption for any non-disk case to
fix the issue.
This caused problems in many places as we use the formatter to copy the
definition. Effectively any copy lost the secret definition.
https://bugzilla.redhat.com/show_bug.cgi?id=1789310https://bugzilla.redhat.com/show_bug.cgi?id=1788898
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
Internal snapshots of a non-running domain do not carry any memory state
and restoring such a snapshot will not replace existing saved memory
state. This allows a scenario, where a user first suspends a domain into
managedsave, restores a non-running snapshot and then resumes the domain
from managedsave. After that, the guest system will run with its
previous memory state atop a different disk state. The most obvious
possible fallout from this is extensive file system corruption. Swap
content and RAID bitmaps might also be off.
This has been discussed[1] and fixed[2] from the end-user perspective for
virt-manager.
This patch marks the restore operation as risky at the libvirt level,
requiring the user to remove the saved memory state first or force the
operation.
[1] https://www.redhat.com/archives/virt-tools-list/2019-November/msg00011.html
[2] https://www.redhat.com/archives/virt-tools-list/2019-December/msg00049.html
Signed-off-by: Michael Weiser <michael.weiser@gmx.de>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Commit v5.10.0-290-g3a4787a301 refactored qemuDomainGetHostdevPath to
return a single path rather than an array of paths. When the function is
called on a missing device, it will now return NULL in @path rather than
a NULL array with zero items and the callers need to be adapted
properly.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
src/qemu/qemu_domain_address.c:680:13: error: this statement may fall through [-Werror=implicit-fallthrough=]
switch ((virDomainFSModel) dev->data.fs->model) {
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Fixes: f363af7e35
The point of this function is to translate virDomainOsDefFirmware
enum to qemuFirmwareOSInterface enum. However, with my commit
v5.10.0-507-g8e1804f9f6 we are passing a variable type of
virDomainLoader enum. Make the function accept both enums and
make the enum members correspond to each other.
This fixes clang build.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Split the formatting by fsdriver type to allow adding a new type.
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Split the switch by fsdriver type to allow adding a new one.
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Wire up the allocation and disposal of private data.
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Remove the 'gluster' part and decouple the return from
the gluster_debug_level parsing to allow adding more options
to this section.
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Inactive VM doesn't have qemuCaps set thus we'd never properly report
that VM backups are supported only for running VMs.
Move the capability check after the active check.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
While we discourage people to use the old style of specifying
UEFI for their domains (the old style is putting path to the FW
image under /domain/os/loader/ whilst the new one is using
/domain/os/@firmware), some applications might have not adapted
yet. They still rely on libvirt autofilling NVRAM path and
figuring out NVRAM template when using the old way (notably
virt-install does this). We must preserve backcompat for this
previously supported config approach. However, since we really
want distro maintainers to leave --with-loader-nvram configure
option and rely on JSON descriptors, we need to implement
autofilling of NVRAM template for the old way too.
Fedora: https://bugzilla.redhat.com/show_bug.cgi?id=1782778
RHEL: https://bugzilla.redhat.com/show_bug.cgi?id=1776949
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
These functions are meant to replace verbose check for the old
style of specifying UEFI with a simple function call.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
This simplifies condition when matching FW interface by having a
single line condition instead of multiline one. Also, it prepares
the code for future expansion.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
This function needs domain definition really, we don't need to
pass the whole domain object. This saves couple of dereferences
and characters esp. in more checks to come.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
We insert the checkpoint metadata into the list of checkpoints prior to
actually creating the on-disk bits. If the 'transaction' or any other
steps done between inserting the checkpoint and creating the on-disk
data fail we'd end up with an unusable checkpoint that would vanish
after libvirtd restart.
Prevent this by rolling back the metadata if we didn't actually take and
record the checkpoint.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
If we are certain that the checkpoint creation failed we remove the
metadata from the list. To allow reusing this in the backup code add a
new helper and export it.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
The underlying resctrl monitoring is actually using 64 bit counters,
not the 32bit one. Correct this by using 64bit data type for reading
hardware value.
To keep the interface consistent, the result of CPU last level cache
that occupied by vcpu processors of specific restrl monitor group is
still reported with a truncated 32bit data type. because, in silicon
world, CPU cache size will never exceed 4GB.
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Wang Huaqiang <huaqiang.wang@intel.com>
Commit d75f865fb9 caused a job-deadlock if
a VM is running the backup job and being destroyed as it removed the
cleanup of the async job type and there was nothing to clean up the
backup job.
Add an explicit cleanup of the backup job when destroying a VM.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
When cancelling the blockjobs as part of failed backup job startup
recover we didn't pass in the correct async job type. Luckily the block
job handler and cancellation code paths use no block job at all
currently so those were correct.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Now that we delete the images elsewhere it's not required. Additionally
it's safe to do as we never released an upstream version which required
this being in place.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
While qemu is running both locations are identical in semantics, but the
move will allow us to fix the scenario when the VM is destroyed or
crashes where we'd leak the images.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
In contrast to snapshots the backup job does not complain when the
backup job's store file has backing pre-configured. It's actually
required so that the NBD server exposes all the data properly.
Remove our fake termination and use the existing disk source as backing.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
qemuDomainObjPrivateDataClear clears state which become invalid after VM
stopped running and the node name allocator belongs there.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
The waiting loop used QEMU_ASYNC_JOB_NONE rather than 'asyncJob' passed
from the caller.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
A few places were importing dirname.h without actually using it.
Reviewed-by: Fabiano Fidêncio <fidencio@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
g_get_real_time() returns the time since epoch in microseconds.
It uses gettimeofday() internally while libvirt used clock_gettime
because it is declared async signal safe. In practice gettimeofday
is also async signal safe *provided* the timezone parameter is
NULL. This is indeed the case in g_get_real_time().
Reviewed-by: Fabiano Fidêncio <fidencio@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
The g_pattern_match function_simple is an acceptably close
approximation of fnmatch for libvirt's needs.
In contrast to fnmatch(), the '/' character can be matched
by the wildcards, there are no '[...]' character ranges and
'*' and '?' can not be escaped to include them literally in
a pattern.
Reviewed-by: Fabiano Fidêncio <fidencio@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
The GLib g_lstat() function provides a portable impl for
Win32.
Reviewed-by: Fabiano Fidêncio <fidencio@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
If we use fake reboot then domain goes thru running->shutdown->running
state changes with shutdown state only for short period of time. At
least this is implementation details leaking into API. And also there is
one real case when this is not convinient. I'm doing a backup with the
help of temporary block snapshot (with the help of qemu's API which is
used in the newly created libvirt's backup API). If guest is shutdowned
I want to continue to backup so I don't kill the process and domain is
in shutdown state. Later when backup is finished I want to destroy qemu
process. So I check if it is in shutdowned state and destroy it if it
is. Now if instead of shutdown domain got fake reboot then I can destroy
process in the middle of fake reboot process.
After shutdown event we also get stop event and now as domain state is
running it will be transitioned to paused state and back to running
later. Though this is not critical for the described case I guess it is
better not to leak these details to user too. So let's leave domain in
running state on stop event if fake reboot is in process.
Reconnection code handles this patch without modification. It detects
that qemu is not running due to shutdown and then calls qemuProcessShutdownOrReboot
which reboots as fake reboot flag is set.
Signed-off-by: Nikolay Shirokovskiy <nshirokovskiy@virtuozzo.com>
Reviewed-by: Cole Robinson <crobinso@redhat.com>
We don't need this for any functional purpose, but when debugging hosts
it is useful to know what binary a given capabilities XML document is
associated with.
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Simplify repeated code patterns by providing a new constructor taking
the QEMU binary name.
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Currently if the binary path is NULL in the qemu capabilities object,
cache invalidation is skipped. A future patch will ensure that the
binary path is always non-NULL, so a way to explicitly skip invalidation
is required.
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
The 'cleanup' flag is doing no cleaup in this function. We can
remove it and return NULL on error or qemuBuildCommandLine().
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
The g_auto*() changes made by the previous patches made a lot
of 'cleanup' labels obsolete. Let's remove them.
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Change all feasible pointers to use g_autoptr().
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
This will allow us to g_autoptr qemuDomainLogContext pointers
in the following patch.
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Change all feasible strings and scalar pointers to use g_autofree.
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
virGetUserRuntimeDirectory() *never* *ever* returns NULL, making the
checks for it completely unnecessary.
Signed-off-by: Fabiano Fidêncio <fidencio@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
virGetUserConfigDirectory() *never* *ever* returns NULL, making the
checks for it completely unnecessary.
Signed-off-by: Fabiano Fidêncio <fidencio@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
virGetUserCacheDirectory() *never* *ever* returns NULL, making the
checks for it completely unnecessary.
Signed-off-by: Fabiano Fidêncio <fidencio@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
virGetUserDirectory() *never* *ever* returns NULL, making the checks for
it completely unnecessary.
Signed-off-by: Fabiano Fidêncio <fidencio@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Previous patch made it possible for the QEMU driver to check if
a given PCI hostdev is unassigned, by checking if dev->info->type is
VIR_DOMAIN_DEVICE_ADDRESS_TYPE_UNASSIGNED, meaning that this device
shouldn't be part of the actual guest launch.
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
This patch introduces a new PCI hostdev address type called
'unassigned'. This new type gives users the option to add
PCI hostdevs to the domain XML in an 'unassigned' state, meaning
that the device exists in the domain, is managed by Libvirt
like any regular PCI hostdev, but the guest does not have
access to it.
This adds extra options for managing PCI device binding
inside Libvirt, for example, making all the managed PCI hostdevs
declared in the domain XML to be detached from the host and bind
to the chosen driver and, at the same time, allowing just a
subset of these devices to be usable by the guest.
Next patch will use this new address type in the QEMU driver to
avoid adding unassigned devices to the QEMU launch command line.
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Move the validation of vmcoreinfo from qemuBuildVMCoreInfoCommandLine()
to qemuDomainDefValidateFeatures(), allowing for validation
at domain define time.
qemuxml2xmltest.c was changed to account for this caps being
now validated at this earlier stage.
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Move smartcard validation being done by qemuBuildSmartcardCommandLine()
to the existing qemuDomainSmartcardDefValidate() function. This
function is called by qemuDomainDeviceDefValidate(), allowing smartcard
validation in domain define time.
Tests were adapted to consider the new caps being needed in
this earlier stage.
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Move EGL Headless validation from qemuBuildGraphicsEGLHeadlessCommandLine()
to qemuDomainDeviceDefValidateGraphics(). This function is called by
qemuDomainDefValidate(), validating the graphics parameters in domain
define time.
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Move the NVDIMM validation from qemuBuildMachineCommandLine()
to a new function in qemu_domain.c, qemuDomainDeviceDefValidateMemory(),
which is called by qemuDomainDeviceDefValidate(). This allows
NVDIMM validation to occur in domain define time.
It also increments memory hotplug validation, which can be seen
by the failures in the hotplug tests in qemuxml2xmltest.c that
needed to be adjusted after the move.
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
The current 'for' loop with 5 consecutive 'ifs' inside
qemuBuildHostdevCommandLine can be a bit smarter:
- all 5 'ifs' fails if hostdev->mode is not equal to
VIR_DOMAIN_HOSTDEV_MODE_SUBSYS. This check can be moved to the
start of the loop, failing to the next element immediately
in case it fails;
- all 5 'ifs' checks for a specific subsys->type to build the proper
command line argument (virHostdevIsSCSIDevice and virHostdevIsMdevDevice
do that but within a helper). Problem is that the code will keep
checking for matches even if one was already found, and there is
no way a hostdev will fit more than one 'if' (i.e. a hostdev can't
have 2+ different types). This means that a SUBSYS_TYPE_USB will
create its command line argument in the first 'if', then all other
conditionals will surely fail but will end up being checked anyway.
All of this can be avoided by moving the hostdev->mode comparing
to the start of the loop and using a switch statement with
subsys->type to execute the proper code for a given hostdev
type.
Suggested-by: Ján Tomko <jtomko@redhat.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
When freeing qemu driver struct members, we forgot to free
@hostcpu and @hostnuma members.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
This function is supposed to clean up virQEMUDriver structure and
free individual members. However, it's doing that in random order
which makes it hard to track which members are being freed and
which are not. Do the free in reverse order than the structure
definition - assuming that the most important members (like
mutex) are declared first and freed last.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Prior to commit 55ce656463 (first in libvirt 4.6.0), the XML sent to
virDomainAttachDeviceFlags() was parsed only once, and the results of
that parse were inserted into both the live object of the running
domain and into the persistent config. Thus, if MAC address was
omitted from in XML for a network device (<interface>), both the live
and config object would have the same MAC address.
Commit 55ce656463 changed the code to parse the incoming XML twice -
once for live and once for config. This does eliminate the problem of
PCI (/scsi/sata) address conflicts caused by allocating an address
based on existing devices in live object, but then inserting the
result into the config (which may already have a device using that
address), BUT it also means that when the MAC address of a network
device hasn't been specified in the XML, each copy will get a
different auto-generated MAC address.
This results in the MAC address of the device changing the next time
the domain is shutdown and restarted, which creates havoc with the
guest OS's network config.
There have been several discussions about this in the last > 1 year,
attempting to find the ideal solution to this problem that makes MAC
addresses consistent and accounts for all sorts of corner cases with
PCI/scsi/sata addresses. All of these discussions fizzled out because
every proposal was either too difficult to implement or failed to fix
some esoteric case someone thought up.
So, in the interest of solving the MAC address problem while not
making the "other address" situation any worse than before, this patch
simply adds a qemuDomainAttachDeviceLiveAndConfigHomogenize() function
that (for now) copies the MAC address from the config object to the
live object (if the original xml had <mac address='blah'/> then this
will be an effective NOP (as the macs already match)).
Any downstream libvirt containing upstream commit
55ce656463 should have this patch as well.
https://bugzilla.redhat.com/1783411
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
If we use glib alloc functions, we can drop the 'cleanup' label
and @rv variable and also simplify the code a bit.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Some variables are not used outside of the for() loop. Move their
declaration to clean up the code a bit.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Cole Robinson <crobinso@redhat.com>
When using the monolithic daemon, then dom->conn has all driver
tables filled in properly and thus it's safe to call an API other
than virDomain*(). However, when using split daemons then
dom->conn has only hypervisor driver table set
(dom->conn->driver) and the rest is NULL. Therefore, if we want
to call a non-domain API (virNetworkLookupByName() in this case),
we have obtain the cached connection object accessible via
virGetConnectNetwork().
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Cole Robinson <crobinso@redhat.com>
If we place qemuDomainInterfaceAddresses() a few lines below the
two functions its using then we can drop forward declarations of
those functions.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Cole Robinson <crobinso@redhat.com>
While at bugfixing, convert the whole function to the new-style memory
allocation handling.
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Signed-off-by: Pavel Mores <pmores@redhat.com>
With NVMe disks, one can start a blockjob with a NVMe disk
that is not visible in domain XML (at least right away). Usually,
it's fairly easy to override this limitation of
qemuDomainGetMemLockLimitBytes() - for instance for hostdevs we
temporarily add the device to domain def, let the function
calculate the limit and then remove the device. But it's not so
easy with virStorageSourcePtr - in some cases they don't
necessarily are attached to a disk. And even if they are it's
done later in the process and frankly, I find it too complicated
to be able to use the simple trick we use with hostdevs.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Cole Robinson <crobinso@redhat.com>
At the very beginning of the attach function the
qemuDomainStorageSourceChainAccessAllow() is called which
modifies CGroups, locks and seclabels for new disk and its
backing chain. This must be followed by a counterpart which
reverts back all the changes if something goes wrong. This boils
down to calling qemuDomainStorageSourceChainAccessRevoke() which
is done under 'error' label. But not all failure branches jump
there. They just jump onto 'cleanup' label where no revoke is
done. Such mistake is easy to do because 'cleanup' label does
exist. Therefore, dissolve 'error' block in 'cleanup' and have
everything jump onto 'cleanup' label.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Because this is a HMP we're dealing with, there is nothing like
class of reply message, so we have to do some string comparison
to guess if the command fails. Well, with NVMe disks whole new
class of errors comes to play because qemu needs to initialize
IOMMU and VFIO for them. You can see all the messages it may
produce in qemu_vfio_init_pci().
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Now, that we have everything prepared, we can generate command
line for NVMe disks.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Cole Robinson <crobinso@redhat.com>
This capability tracks if qemu is capable of:
-drive file.driver=nvme
The feature was added in QEMU's commit of v2.12.0-rc0~104^2~2.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Cole Robinson <crobinso@redhat.com>
If a domain has an NVMe disk configured, then we need to allow it
on devices CGroup so that qemu can access it. There is one caveat
though - if an NVMe disk is read only we need CGroup to allow
write too. This is because when opening the device, qemu does
couple of ioctl()-s which are considered as write.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Cole Robinson <crobinso@redhat.com>
There are couple of places where a domain with a VFIO device gets
special treatment: in CGroups when enabling/disabling access to
/dev/vfio/vfio, and when creating/removing nodes in domain mount
namespace. Well, a NVMe disk is a VFIO device too. Fortunately,
we have this qemuDomainNeedsVFIO() function which is the only
place that needs adjustment.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Cole Robinson <crobinso@redhat.com>
If a domain has an NVMe disk configured, then we need to create
/dev/vfio/* paths in domain's namespace so that qemu can open
them.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Cole Robinson <crobinso@redhat.com>
We have this beautiful function that does crystal ball
divination. The function is named
qemuDomainGetMemLockLimitBytes() and it calculates the upper
limit of how much locked memory is given guest going to need. The
function bases its guess on devices defined for a domain. For
instance, if there is a VFIO hostdev defined then it adds 1GiB to
the guessed maximum. Since NVMe disks are pretty much VFIO
hostdevs (but not quite), we have to do the same sorcery.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
ACKed-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Cole Robinson <crobinso@redhat.com>
The qemu driver has its own wrappers around virHostdev module (so
that some arguments are filled in automatically). Extend these to
include NVMe devices too.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
ACKed-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Cole Robinson <crobinso@redhat.com>
To simplify implementation, some restrictions are added. For
instance, an NVMe disk can't go to any bus but virtio and has to
be type of 'disk' and can't have startupPolicy set.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Cole Robinson <crobinso@redhat.com>
There are going to be more disk types that are considered unsafe
with respect to migration. Therefore, move the error reporting
call outside of if() body and rework if-else combo to switch().
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Sometimes, we have a PCI address and not fully allocated
virPCIDevice and yet we still want to know its /dev/vfio/N path.
Introduce virPCIDeviceAddressGetIOMMUGroupDev() function exactly
for that.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Previous patches rendered some of 'cleanup' labels needless.
Drop them.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Now that all callers of qemuDomainGetHostdevPath() handle
/dev/vfio/vfio on their own, we can safely drop handling in this
function. In near future the decision whether domain needs VFIO
file is going to include more device types than just
virDomainHostdev.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Cole Robinson <crobinso@redhat.com>
There are several variables which could be automatically freed
upon return from the function. I'm not changing @tmpPaths (which
is a string list) because it is going to be removed in next
commit.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Cole Robinson <crobinso@redhat.com>
In near future, the decision what to do with /dev/vfio/vfio with
respect to domain namespace and CGroup is going to be moved out
of qemuDomainGetHostdevPath() because there will be some other
types of devices than hostdevs that need access to VFIO.
All functions that I'm changing (except qemuSetupHostdevCgroup())
assume that hostdev we are adding/removing to VM is not in the
definition yet (because of how qemuDomainNeedsVFIO() is written).
Fortunately, this assumption is true.
For qemuSetupHostdevCgroup(), the worst thing that may happen is
that we allow /dev/vfio/vfio which was already allowed.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Cole Robinson <crobinso@redhat.com>
qemuBuildSoundCodecStr() validates if a given QEMU binary
supports the sound codec. This validation can be moved to
qemu_domain.c to be executed in domain define time.
The codec validation was moved to the existing
qemuDomainDeviceDefValidateSound() function.
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Move QEMU caps validation of QEMU_CAPS_OBJECT_USB_AUDIO and
QEMU_CAPS_DEVICE_ICH9_INTEL_HDA to a new function in qemu_domain.c,
qemuDomainDeviceDefValidateSound(). This function is called by
qemuDomainDeviceDefValidate() to validate the sound device
in domain define time.
qemuxml2xmltest.c was adjusted to add the now required caps for
domain definition.
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
qemuBuildTPMDevStr() does TPM model validation that can be moved to
qemu_domain.c, allowing validation in domain define time. This patch
moves it to the existing qemuDomainDeviceDefValidateTPM() function.
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Console validation is currently being done by qemuBuildConsoleCommandLine().
This patch moves it to a new qemuDomainDefValidateConsole() function. This
new function is then called by qemuDomainDefValidate(), validating the
console in domain define time.
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Move the SPICE caps validation from qemuBuildGraphicsSPICECommandLine()
to a new function called qemuDomainDeviceDefValidateSPICEGraphics().
This function is called by qemuDomainDeviceDefValidateGraphics(),
which in turn is called by qemuDomainDefValidate(), validating the graphics
parameters in domain define time.
This validation move exposed a flaw in the 'default-video-type' tests
for PPC64, AARCH64 and s390 archs. The XML was considering 'spice' as
the default video type, which isn't true for those architectures.
This was flying under the radar until now because the SPICE validation
was being made in 'virsh start' time, while the XML validation done in
qemuxml2xmltest.c considers define time.
All other tests were adapted to consider SPICE validation in this
earlier stage.
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Move the VNC cap validation from qemuBuildGraphicsVNCCommandLine()
to qemuDomainDeviceDefValidateGraphics(). This function is called by
qemuDomainDefValidate(), validating the graphics parameters in domain
define time.
Tests were adapted to consider SDL validation in this earlier stage.
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
There are validations for SDL, VNC, SPICE and EGL_HEADLESS
around several BuildGraphics*CommandLine in qemu_command.c. This
patch starts to move all of them to qemu_domain.c, inside the
existent qemuDomainDeviceDefValidateGraphics() function. This
function is called by qemuDomainDefValidate(), validating the
graphics parameters in domain define time.
In this patch we'll move the SDL validation code from
qemuBuildGraphicsSDLCommandLine(). Tests were adapted to consider
SDL validation in this earlier stage.
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Move the pcihole64 validation being done by
qemuBuildGlobalControllerCommandLine() to the existing function
qemuDomainDeviceDefValidateControllerPCI(), which provides
domain define time validation.
The existing pcihole64 validations in qemu_domain.c were replaced
by the ones moved from qemu_command.c. The reason is that they
are more specific, allowing VIR_DOMAIN_CONTROLLER_MODEL_PCI_ROOT
and VIR_DOMAIN_CONTROLLER_MODEL_PCIE_ROOT to have distinct validation,
with exclusive QEMU caps and machine types.
Tests were adapted to consider the new caps being needed in
this earlier stage.
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Move the boot validation being done by qemuBuildBootCommandLine()
to to a new qemuDomainDefValidateBoot() function. This new function
is called by qemuDomainDefValidate(), allowing boot validation in
domain define time.
Tests were adapted to consider the new caps being needed in
this earlier stage.
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Move the PM validation being done by qemuBuildPMCommandLine() to
to a new qemuDomainDefValidatePM() function. This new function
is called by qemuDomainDefValidate(), promoting PM validation in
domain define time.
Tests were adapted to consider the new caps being needed in
this earlier stage.
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
@def->clock validation is done by qemuBuildClockCommandLine() and
qemuBuildClockArgStr(). This patch centralize the validation done
in both these functions to a new qemuDomainDefValidateClockTimers()
function. This new function is then called by qemuDomainDefValidate(),
promoting clock validation in domain define time.
Tests were adapted to consider the new caps being needed in
this earlier stage.
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
QEMU_CAPS_DEVICE_VMGENID is now being validated by
qemuDomainDefValidate().
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Move QEMU caps validation of qemuBuildHostdevCommandLine() to
qemuDomainDeviceDefValidateHostdev() and qemuDomainMdevDefValidate(),
allowing them to be validated at domain define time.
Tests were adapted to consider the new caps being needed in
this earlier stage.
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Move QEMU caps validation of QEMU_CAPS_CHARDEV_FILE_APPEND and
QEMU_CAPS_CHARDEV_LOGFILE to qemuDomainChrSourceDefValidate().
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Move QEMU caps validation of QEMU_CAPS_USB_HUB to a new function in
qemu_domain.c, qemuDomainDeviceDefValidateHub(). This function is
called by qemuDomainDeviceDefValidate() to validate the sound device
in domain define time.
qemuxml2xmltest.c was adjusted to add the now required caps for
domain definition.
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
A new function qemuDomainDeviceDefValidateNVRAM() was created
to validate the NVRAM in domain define time. Unit test was
adjusted to account for the extra QEMU_CAPS_DEVICE_NVRAM required
during domain define.
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
A new qemuDomainDefValidateNuma() function was created to host
all the QEMU caps validation being done inside qemuBuildNumaArgStr().
This new function is called by qemuDomainValidateCpuCount()
to allow NUMA validation in domain define time.
Tests were changed to account for the QEMU capabilities
that need to be present at domain define time.
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Next patch will validate QEMU_CAPS_NUMA_DIST in a new qemu_domain.c
function. The code to verify if a NUMA node distance is being
set will still be needed in qemuBuildNumaArgStr() though.
To avoid code repetition, let's put this logic in a helper to be
used in qemuBuildNumaArgStr() and in the new function.
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Validation of MACHINE_KERNEL_IRQCHIP and MACHINE_KERNEL_IRQCHIP_SPLIT
QEMU caps are now being done in qemuDomainDefValidateFeatures().
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
virQEMUCapsSupportsVmport() is now being called inside
qemuDomainDefValidateFeatures() for VIR_DOMAIN_FEATURE_VMPORT
feature.
qemuxml2xmltest.c was changed to account for this caps being
now validated at domain define time.
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Introduce a new function called qemuDomainDefValidatePSeriesFeature()
that will center all the PSeries validation done in qemu_command.c.
qemuDomainDefValidatePSeriesFeature() is then called during domain
define time, in qemuDomainDefValidateFeatures().
qemuxml2argvtest.c is also changed to include all the caps that now
are being validated in define time.
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
There is plenty of distributions that haven't switched to
systemd nor they force their users to (Gentoo, Alpine Linux to
name a few). With the daemon split merged their only option is to
still use the monolithic daemon which will go away eventually.
Provide init scripts for these distros too.
For now, I'm not introducing config files which would correspond
to the init files except for libvirtd and virtproxyd init scripts
where it might be desirable to tweak the command line of
corresponding daemons.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
As of commit 2a00ef6e71 which
was released in v5.2.0, we require YAJL to build the QEMU driver.
Remove the checks from code that requires the QEMU driver
or checks that also check for WITH_QEMU.
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
To allow backups work across external snapshots we need to improve the
algorithm which calculates which bitmaps to merge.
The algorithm must look for appropriately named bitmaps in the image and
possibly descend into a backing image if the current image does not have
the bitmap.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
This function looks up a named bitmap for a virStorageSource in the data
returned from query-named-block-nodes.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
The function will require the bitmap topology for the full
implementation. To facilitate testing, add the propagation of the
necessary data beforehand so that the test code can stay unchanged
during the changes.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Separate the for now incomplete code that collects the bitmaps to be
merged for an incremental backup into a separate function. This will
allow adding testing prior to the improvement of the algorithm to
include snapshots.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
The object itself has no extra value and it would make testing the code
harder. Refactor it to remove just the definition pointer.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Re-create any active persistent bitmap in the snapshot overlay image so
that tracking for a checkpoint is persisted. While this basically
duplicates data in the allocation map it's currently the only possible
way as qemu can't mirror the allocation map into a dirty bitmap if we'd
ever want to do a backup.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
qemuDomainSnapshotDiskPrepareOne is already called for each disk which
is member of the snapshot so we don't need to iterate through the
snapshot list again to generate members of the 'transaction' command for
each snapshot.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
For testing purposes it will be beneficial to be able to parse the data
from JSON directly rather than trying to simulate the monitor. Extract
the worker bits and export them.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
We will need to inspect the presence and attributes for dirty bitmaps.
Extract them when processing reply of query-named-block-nodes.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
The use of the parseOpaque parameter was mistakenly removed in
commit 4a4132b462
Author: Daniel P. Berrangé <berrange@redhat.com>
Date: Tue Dec 3 10:49:49 2019 +0000
conf: don't use passed in caps in post parse method
causing the method to re-fetch qemuCaps that were already just
fetched and put into parseOpaque.
This is inefficient when parsing incoming XML, but for live
XML this is more serious as it means we use the capabilities
for the current QEMU binary on disk, rather than the running
QEMU.
That commit, however, did have a useful side effect of fixing
a crasher bug in the qemu post parse callback introduced by
commit 5e939cea89
Author: Jiri Denemark <jdenemar@redhat.com>
Date: Thu Sep 26 18:42:02 2019 +0200
qemu: Store default CPU in domain XML
The qemuDomainDefSetDefaultCPU() method in that patch did not
allow for the possibility that qemuCaps would be NULL and thus
resulted in a SEGV.
This shows a risk in letting each check in the post parse
callback look for qemuCaps == NULL. The safer option is to
check once upfront and immediately stop (postpone) further
validation.
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Don't check os type / virt type / arch in the post-parse callback
because we can't assume qemuCaps is non-NULL at this point. It
also conceptually belongs to the validation callback.
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
This function will be removed in a future commit because it allows the
caller to acquire both monitor and agent jobs at the same time. Holding
both job types creates a vulnerability to denial of service from a
malicious guest agent.
qemuDomainSetVcpusFlags() always passes NONE for either the monitor job
or the agent job (and thus is not vulnerable to the DoS), so we can
simply replace this function with the functions for acquiring the
appropriate type of job.
Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
We have to assume that the guest agent may be malicious so we don't want
to allow any agent queries to block any other libvirt API. By holding
a monitor job while we're querying the agent, we open ourselves up to a
DoS.
Split the function so that the portion issuing the agent command only
holds an agent job and the portion issuing the monitor command holds
only a monitor job.
Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
We have to assume that the guest agent may be malicious so we don't want
to allow any agent queries to block any other libvirt API. By holding a
monitor job while we're querying the agent, we open ourselves up to a
DoS.
So split the function up a bit to only hold the monitor job while
querying qemu for whether the domain supports suspend. Then acquire only
an agent job while issuing the agent suspend command.
Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
We have to assume that the guest agent may be malicious so we don't want
to allow any agent queries to block any other libvirt API. By holding
a monitor job while we're querying the agent, we open ourselves up to a
DoS.
Split the function so that we only hold the appropriate type of job
while rebooting.
Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
We have to assume that the guest agent may be malicious so we don't want
to allow any agent queries to block any other libvirt API. By holding
a monitor job while we're querying the agent, we open ourselves up to a
DoS. So split the function into separate parts: one that does the agent
shutdown and one that does the monitor shutdown. Each part holds only a
job of the appropriate type.
Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Replace all the uses passing a single parameter as the length.
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
My hesitation to remove VIR_STRDUP without VIR_STRNDUP resulted
in these being able to sneak in.
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
This reverts commit 7be5fe66cd.
This commit broke resctrl, because it missed the fact that the
virResctrlInfoGetCache() has side-effects causing it to actually
change the virResctrlInfo parameter, not merely get data from
it.
This code will need some refactoring before we can try separating
it from virCapabilities again.
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
This commit aims to fix
https://bugzilla.redhat.com/show_bug.cgi?id=1610207
The cause was apparently incorrect handling of jobs in snapshot
revert code which allowed a thread executing snapshot delete to
begin job while snapshot revert was still running on another
thread. The snapshot delete thread then waited on a condition
variable in qemuMonitorSend() while the revert thread finished,
changing (and effectively corrupting) the qemuMonitor structure
under the delete thread which led to its crash.
The incorrect handling of jobs in revert code was due to the fact
that although qemuDomainRevertToSnapshot() correctly begins a job
at the start, the job was implicitly ended when qemuProcessStop()
was called because the job lives in the QEMU driver's private
data (qemuDomainObjPrivate) that was purged during
qemuProcessStop().
This fix prevents qemuProcessStop() from clearing jobs as the
idea of qemuProcessStop() clearing jobs seems wrong in the first
place. It was (inadvertently) introduced in commit
888aa4b6b9, which is effectively reverted by
the second hunk of this commit. To preserve the desired effects
of the faulty commit, the first hunk is included as suggested by
Michal.
Signed-off-by: Pavel Mores <pmores@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
When QEMU uid/gid is set to non-root this is pointless as if we just
used a regular setuid/setgid call, the process will have all its
capabilities cleared anyway by the kernel.
When QEMU uid/gid is set to root, this is almost (always?) never
what people actually want. People make QEMU run as root in order
to access some privileged resource that libvirt doesn't support
yet and this often requires capabilities. As a result they have
to go find the qemu.conf param to turn this off. This is not
viable for libguestfs - they want to control everything via the
XML security label to request running as root regardless of the
qemu.conf settings for user/group.
Clearing capabilities was implemented originally because there
was a proposal in Fedora to change permissions such that root,
with no capabilities would not be able to compromise the system.
ie a locked down root account. This never went anywhere though,
and as a result clearing capabilities when running as root does
not really get us any security benefit AFAICT. The root user
can easily do something like create a cronjob, which will then
faithfully be run with full capabilities, trivially bypassing
the restriction we place.
IOW, our clearing of capabilities is both useless from a security
POV, and breaks valid use cases when people need to run as root.
This removes the clear_emulator_capabilities configuration
option from qemu.conf, and always runs QEMU with capabilities
when root. The behaviour when non-root is unchanged.
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
With all plumbing in place, we can now enable the new functionality.
Signed-off-by: Pavel Mores <pmores@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Since blockcommit is asynchronous, libvirtd can be restarted while the
operation runs. To ensure the information necessary to finish up the job
is not lost, serialisation to and deserialisation from the status XML is
added.
To unittest this, the new element was only added to the active commit test,
the non-active commit test doesn't have the new element so as to test its
absence.
Signed-off-by: Pavel Mores <pmores@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
When blockcommit finishes successfully, one of the
qemuBlockJobProcessEventCompletedCommit() and
qemuBlockJobProcessEventCompletedActiveCommit() event handlers is called.
This is where the delete flag (stored in qemuBlockJobCommitData since the
previous commit) can actually be used to delete the committed snapshot
images if requested.
We use virFileRemove() instead of a simple unlink() to cover the case where
the image to be removed is on an NFS volume.
Signed-off-by: Pavel Mores <pmores@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Propagate the delete flag from qemuDomainBlockCommit() (which was just
ignoring it until now) to qemuBlockJobDiskNewCommit() where it can be
stored in the qemuBlockJobCommitData structure which holds information
necessary to finish the job asynchronously.
In the actual qemuBlockJobDiskNewCommit() in this commit, we temporarily
pass a literal 'false' to preserve the current behaviour until the whole
implementation of the feature is in place.
Signed-off-by: Pavel Mores <pmores@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
After the individual sub-blockjobs of a backup libvirt job finish we
must detect it and notify the parent job, so that it can be properly
terminated.
Since we update job information to determine success of a blockjob we
can directly report back also statistics of the blockjob.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Use the helper which cancels all blockjobs to perform the backup job
cancellation in qemuDomainAbortJob.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
We can use the output of 'query-jobs' to figure out some useful
information about a backup job. That is progress in case of a push job
and scratch file use in case of a pull job.
Add a worker which will total up the data and call it from
qemuDomainGetJobStatsInternal.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
A backup blockjob needs to be able to notify the parent backup job as
well as track all data to be able to clean up the bitmap and blockdev
used for the backup.
Add the data structure, job allocation function and status XML formatter
and parser.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Store the data of a backup job along with the index counter for new
backup jobs in the status XML. Currently we will support only one
backup job and thus there's no necessity to add arrays of jobs.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Implement the transaction actions generator for blockdev-backup.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
A backup job may consist of many backup sub-blockjobs. Add the new
blockjob type and add all type converter strings.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
We will want to use the async job infrastructure along with all the APIs
and event for the backup job so add the backup job as a new async job
type.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Introduce QEMU_DOMAIN_JOB_STATS_TYPE_BACKUP and the convertors and other
plumbing to be able to report statistics for the backup job.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
$ cat f | grep -e arch -e emulator
<type arch='mipsel'>hvm</type>
$ sudo virsh define f
error: Failed to define domain from f
error: An error occurred, but the cause is unknown
After:
$ sudo virsh define f
error: Failed to define domain from f
error: unsupported configuration: No emulator found for arch 'mipsel'
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Cole Robinson <crobinso@redhat.com>
'cfg' is never initialized here, which causes a crash
later in qemuCheckpointCreateFinalize
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Signed-off-by: Cole Robinson <crobinso@redhat.com>
For any backing file we set 'read-only' to true, but didn't do this when
modifying the recorded backing store when creating external snapshots.
This meant that qemu would attempt to open the backing-file read-write.
This would fail for example when selinux is used as qemu doesn't have
write permission for the backing file.
https://bugzilla.redhat.com/show_bug.cgi?id=1781079
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Now that nearly all internal APIs use the QEMU capabilities or other
QEMU driver data directly, there's no compelling benefit to create
virCapsPtr at driver startup.
Skipping this means we don't probe capabilities for all 30 system
emulator targets at startup, only those emulators which are referenced
by an XML doc. This massively improves libvirtd startup time when the
capabilities cache is not populated. It even improves startup time
when the cache is up to date, as we don't bother to load files from
the cache until we need them.
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
We always refresh the capabilities object when using virResctrlInfo
during process startup. This is undesirable overhead, because we can
just directly create a virResctrlInfo instead.
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Avoid grabbing the whole virCapsPtr object when we only need the
host CPU information.
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Annoyingly there was no existing constructor, and identifying all the
places which do a VIR_ALLOC(cpu) is a bit error prone. Hopefully this
has found & converted them all.
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Avoid grabbing the whole virCapsPtr object when we only need the
NUMA information.
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
The NUMA cells are stored directly in the virCapsHostPtr
struct. This moves them into their own struct allowing
them to be stored independantly of the rest of the host
capabilities. The change is used as an excuse to switch
the representation to use a GPtrArray too.
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Now that the domain XML APIs don't use virCapsPtr we can stop passing it
around many QEMU driver methods.
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
This parameter is now unused and can be removed entirely.
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
None of the impls of this callback require the virCapsPtr param.
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
None of the impls of this callback require the virCapsPtr param.
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
No impl of this callback requires the virCapsPtr anymore.
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
The only user of this callback did not require the virCapsPtr parameter.
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
The QEMU impl of the callback can directly use the QEMU capabilities
cache to resolve the emulator binary name, allowing virCapsPtr to be
dropped.
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
The virCapsPtr param is not used by any of the virt drivers providing
this callback.
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Instead of using the virCapsPtr to get the default security model,
pass this in via the parser config.
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Currently the disk and chardev seclabels are validated immediately at
the time their data is parsed. This forces the parser to fill in the
top level secmodel at time of parsing which is an undesirable thing.
This validation conceptually should be done in the post-parse phase
instead.
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
To enable the virCapsPtr parameter to the post parse method to be
eliminated, the drivers must fetch the virCapsPtr from their own
driver via the opaque parameter, or use an alternative approach
to validate the parsed data.
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
The XML parser currently calls virCapabilitiesDomainDataLookup during
parsing to find the domain capabilities matching the triple
(virt type, os type, arch)
This is, however, bogus with the QEMU driver as it assumes that there
is an emulator known to the default driver capabilities that matches
this triple. It is entirely possible for the driver to be parsing an
XML file with a custom emulator path specified pointing to a binary
that doesn't exist in the default driver capabilities. This will,
for example be the case on a RHEL host which only installs the host
native emulator to /usr/bin. The user can have built a custom QEMU
for non-native arches into $HOME and wish to use that.
Aside from validation, this call is also used to fill in a machine type
for the guest if not otherwise specified. Again, this data may be
incorrect for the QEMU driver because it is not taking account of
the emulator binary that is referenced.
To start fixing this, move the validation to the post-parse callbacks
where more intelligent driver specific logic can be applied.
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Moving their instance parameter to be the first one, and give consistent
ordering of other parameters across all functions. Ensure that the xml
options are passed into both functions in prep for future work.
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Our normal practice is for the object type to be the name prefix, and
the object instance be the first parameter passed in.
Rename these to virDomainObjSave and virDomainDefSave moving their
primary parameter to be the first one. Ensure that the xml options
are passed into both functions in prep for future work.
Finally enforce checking of the return type and mark all parameters
as non-NULL.
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Currently the virQEMUCapsPtr objects are just empty. Future patches are
going to expect them to contain real data. Start off by populating the
machine types and arch information.
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
