The function calls virSecurityManagerDomainRestorePathLabel()
after all.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
The new name is virSecurityManagerDomainRestorePathLabel().
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
After previous commit this function is used no more.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
After previous commit this function is used no more.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
There are two places within qemu driver that misuse
qemuSecuritySetSavedStateLabel() to set seclabels on tempfiles
that are not state files: qemuDomainScreenshot() and
qemuDomainMemoryPeek(). They are doing so because of lack of
qemuSecurityDomainSetPathLabel() at the time of their
introduction.
In all three secdrivers (well, four if you count NOP driver) the
implementation of .domainSetSavedStateLabel and
.domainSetPathLabel callbacks is the same anyway.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
Libvirt allows the user to define an incomplete NUMA topology, where
the sum of all CPUs in each cell is less than the total of VCPUs.
What ends up happening is that QEMU allocates the non-enumerated CPUs
in the first NUMA node. This behavior is being flagged as 'to be
deprecated' at least since QEMU commit ec78f8114bc4 ("numa: use
possible_cpus for not mapped CPUs check").
In [1], Maxiwell suggested that we forbid the user to define such
topologies. In his review [2], Peter Krempa pointed out that we can't
break existing guests, and suggested that Libvirt should emulate the
QEMU behavior of putting the remaining vCPUs in the first NUMA node
in these cases.
This patch implements Peter Krempa's suggestion. Since we're going
to most likely end up with disjointed NUMA configuration in node 0
after the auto-fill, we're making auto-fill dependent on QEMU_CAPS_NUMA.
A following patch will update the documentation not just to inform
about the auto-fill mechanic with incomplete NUMA topologies, but also
to discourage the user to create such topologies in the future. This
approach also makes Libvirt independent of whether QEMU changes
its current behavior since we're either auto-filling the CPUs in
node 0 or the user (hopefully) is aware that incomplete topologies,
although supported in Libvirt, are to be avoided.
[1] https://www.redhat.com/archives/libvir-list/2019-June/msg00224.html
[2] https://www.redhat.com/archives/libvir-list/2019-June/msg00263.html
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
These helpers will be used in an auto-fill feature for incomplete
NUMA topologies in the next patch.
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Given our supported platform matrix, we can safely assume that
all the capability constants we need are defined by the system
headers.
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Given our supported platform matrix, we can safely assume that
all the clone constants we need are defined by the system
headers.
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Given our supported platform matrix, we can safely assume that
all the mount constants we need are defined by the system
headers.
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
No default model should be added to the interface
entry at post parse when its actual network type is hostdev
as doing so might cause a mismatch between the interface
definition and its actual device type.
Signed-off-by: Paulo de Rezende Pinatti <ppinatti@linux.ibm.com>
Reviewed-by: Laine Stump <laine@redhat.com>
The same functionality can be achieved using migrate-set-parameters QMP
command with xbzrle-cache-size parameter.
https://bugzilla.redhat.com/show_bug.cgi?id=1845012
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
The same functionality can be achieved using query-migrate-parameters
QMP command and checking the xbzrle-cache-size parameter.
https://bugzilla.redhat.com/show_bug.cgi?id=1829544
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
The same functionality can be achieved using migrate-set-parameters QMP
command with downtime-limit parameter.
https://bugzilla.redhat.com/show_bug.cgi?id=1829543
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
The same functionality can be achieved using migrate-set-parameters QMP
command with max-bandwidth parameter.
https://bugzilla.redhat.com/show_bug.cgi?id=1829545
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
These parameters were originally set via dedicated commands which are
now deprecated. We want to use migrate-set-parameters instead if
possible.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
In v6.4.0-72-g3dda889a44 I've introduced parsing and formatting
of new sysinfo type 'fwcfg'. However, I've forgot to introduce
code that would free parsed data.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
This function handles the change of NUMA nodeset for a given
guest, setting CpusetMems for the emulator, vcpus and IOThread
sub-groups. It doesn't set the same nodeset to the root cgroup
though. This means that cpuset.mems of the root cgroup ends up
holding the new nodeset and the old nodeset as well. For
a guest with placement=strict, nodeset='0', doing
virsh numatune <vm> 0 8 --live
Will make cpuset.mems of emulator, vcpus and iothread to be
"8", but cpuset.mems of the root cgroup will be "0,8".
This means that any new tasks that ends up landing in the
root cgroup, aside from the emulator/vcpus/iothread sub-groups,
will be split between the old nodeset and the new nodeset,
which is not what we want.
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Since a08669c31, @tsc is not automatically free'd by any g_auto* method.
Found by Coverity.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Since 1f5deed9, @veid_str has been leaked in the error path.
Found by Coverity.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Since 60623a7c, @temp_file was not properly free'd on the non error path.
Found by Coverity.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Since 9ea90206, @drvpath could be overwritten if we jumped to recheck
Found by Coverity.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Since 5b82f7f3, @path should have been placed inside the for loop
since it'd need to be free'd for each pass through the loop; otherwise,
we'd leak like a sieve.
Found by Coverity.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Since 5084091a, @authcred is filled by a g_key_file_get_string which is
now an allocated string as opposed to some hash table lookup value, so
we need to treat it as so.
Found by Coverity
Signed-off-by: John Ferlan <jferlan@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Since 5084091a, @tmp is filled by a g_key_file_get_string which is
now an allocated string as opposed to some hash table lookup value,
so we need to treat it as so.
Found by Coverity
Signed-off-by: John Ferlan <jferlan@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Domains are now allowed to be pinned to host CPUs with IDs up to 16383.
The new limit is as arbitrary as the old one. It's just bigger.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Implement secure guest check for AMD SEV (Secure Encrypted
Virtualization) in order to invalidate the qemu capabilities
cache in case the availability of the feature changed.
For AMD SEV the verification consists of:
- checking if /sys/module/kvm_amd/parameters/sev contains the
value '1': meaning SEV is enabled in the host kernel;
- checking if /dev/sev exists
Signed-off-by: Paulo de Rezende Pinatti <ppinatti@linux.ibm.com>
Signed-off-by: Boris Fiuczynski <fiuczy@linux.ibm.com>
Reviewed-by: Bjoern Walk <bwalk@linux.ibm.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
This patch introduces a common function to verify if the
availability of the so-called Secure Guest feature on the host
has changed in order to invalidate the qemu capabilities cache.
It can be used as an entry point for verification on different
architectures.
For s390 the verification consists of:
- checking if /sys/firmware/uv is available: meaning the HW
facility is available and the host OS supports it;
- checking if the kernel cmdline contains 'prot_virt=1': meaning
the host OS wants to use the feature.
Whenever the availability of the feature does not match the secure
guest flag in the cache then libvirt will re-build it in order to
pick up the new set of capabilities available.
Signed-off-by: Paulo de Rezende Pinatti <ppinatti@linux.ibm.com>
Signed-off-by: Boris Fiuczynski <fiuczy@linux.ibm.com>
Tested-by: Viktor Mihajlovski <mihajlov@linux.ibm.com>
Reviewed-by: Bjoern Walk <bwalk@linux.ibm.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
Introduce two utility functions to parse a kernel command
line string according to the kernel code parsing rules in
order to enable the caller to perform operations such as
verifying whether certain argument=value combinations are
present or retrieving an argument's value.
Signed-off-by: Paulo de Rezende Pinatti <ppinatti@linux.ibm.com>
Signed-off-by: Boris Fiuczynski <fiuczy@linux.ibm.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
This was mostly boilerplate conversion, but in one case I needed to
define several differently named char* to take the place of a single
char *tmp that was re-used multiple times, and in another place there
was a single char* that was used at the toplevel of the function, and
then later used repeatedly inside a for loop, so I defined a new
separate char* inside the loop.
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
Now that we have support for IPv6 in the iptables helpers, and a new
option in the XML schema, we can wire up support for it in the network
driver.
Reviewed-by: Laine Stump <laine@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Historically IPv6 did not support NAT, so when IPv6 was added to
libvirt's virtual networks, when requesting <forward mode="nat"/>
libvirt will NOT apply NAT to IPv6 traffic, only IPv4 traffic.
This is an annoying historical design decision as it means we
cannot enable IPv6 automatically. We thus need to introduce a
new attribute
<forward mode="nat">
<nat ipv6="yes"/>
</forward>
Reviewed-by: Laine Stump <laine@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
IPv6 does support masquerade since Linux 3.9.0 / ip6tables 1.4.18,
which is Fedora 18 / RHEL-7 vintage, which covers all our supported
Linux versions.
Reviewed-by: Laine Stump <laine@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
In v6.4.0-rc1~143 I've introduced a check that is supposed to
return from the function early, if given path is not a dm target.
While the idea is still valid, the implementation had a flaw.
It calls stat() over given path and the uses major(sb.st_dev) to
learn the major of the device. This is then passed to
dm_is_dm_major() which returns true or false depending whether
the device is under devmapper's control or not.
The problem with this approach is in how the major of the device
is obtained - paths managed by devmapper are special files and
thus we want to be using st_rdev instead of st_dev to obtain the
major number. Well, that's what virIsDevMapperDevice() does
already so might as well us that.
Fixes: 01626c668e
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1839992
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
When introducing virdevmapper.c (in v4.3.0-rc1~427) I didn't
realize there is a function that calls in devmapper. The function
is called virIsDevMapperDevice() and lives in virutil.c. Now that
we have a special file for handling devmapper move it there.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
Compilers are not very good at detecting this problem. Fixed by manual
inspection of compilation warnings after replacing 'VIR_FREE' with an
empty macro.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com
If one of the early checks to get screen resolution fails 'screenData'
would be passed to VIR_FREE uninitialized. Unfortunately the compiler
isn't able to detect this when VIR_FREE is implemented using
g_clear_pointer.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com
'uri_out' may be passed to VIR_FREE uninitialized if 'conn' is NULL.
Unfortunately the compiler isn't able to detect this problem when
VIR_FREE is implemented using g_clear_pointer. Initialize the variable.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com
This is pretty straightforward and self explanatory.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1837990
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
For the case where -fw_cfg uses a file, we need to set the
seclabels on it to allow QEMU the access. While QEMU allows
writing into the file (if specified on the command line), so far
we are enabling reading only and thus we can use read only label
(in case of SELinux).
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
This capability tracks whether QEMU supports -fw_cfg command line
option, more specifically whether it allows specifying filename.
There are some releases of QEMU which support -fw_cfg but not
filename. If this is ever a problem we can refine the capability
later on.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
There are recommendations and limitations to the name of the
config blobs we need to follow [1].
We don't want users to change any value only add new blobs. This
means, that the name must have "opt/" prefix and at the same time
must not begin with "opt/ovmf" nor "opt/org.qemu" as these are
reserved for OVMF or QEMU respectively.
1: docs/specs/fw_cfg.txt from qemu.git
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
QEMU has -fw_cfg which allows users to tweak how firmware
configures itself and/or provide new configuration blobs.
Introduce new <sysinfo/> type "fwcfg" that will hold these
new blobs.
It's possible to either specify new value as a string or
provide a filename which contents then serve as the value.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Setting OEM strings for a domain was introduced in
v4.1.0-rc1~315. However, any application that wanted to use them
(e.g. to point to an URL where a config file is stored) had to
'dmidecode -u --oem-string N' (where N is index of the string).
Well, we can expose them under our <sysinfo/> XML and if the
domain is running Libvirt inside it can be obtained using
virConnectGetSysinfo() API.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Since nobody sets custom dmidecode path anymore, we can drop all
code that exists only because of that.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Problem with custom dmidecode scripts is that they are hard to
modify, especially if we will want them to act differently based
on passed arguments. So far, we have two scripts which do no more
than 'cat $sysinfo' where $sysinfo is saved dmidecode output.
The virCommandSetDryRun() can be used to trick
virSysinfoReadDMI() thinking it executed real dmidecode.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
When trying to decode DMI table, just before constructing
virCommand() the decoder is looked for in PATH using
virFindFileInPath(). Well, this is not necessary because
virCommandRun() will do this too (in virExec()).
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Virtually every variable defined in the function can be freed
automatically when going out of scope.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Before QEMU introduced migratable CPU property, "-cpu host" included all
features that could be enabled on the host, even those which would block
migration. In other words, the default was equivalent to migratable=off.
When the migratable property was introduced, the default changed to
migratable=on. Let's record the default in domain XML.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
The attribute is only allowed for host-passthrough CPUs and it can be
used to request only migratable or all supported features to be enabled
in the virtual CPU.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
There's no need to set ctxt->node outside of the function. The
function can set it itself - it has all the info needed.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
I think that since <qemu:commandline/> is kind of a hack, it
doesn't deserve place in the front row.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
The virStateInitialize() function has ATTRIBUTE_NONNULL()
referring to @root argument (incorrectly anyway) but in
daemonRunStateInit() NULL is passed in anyway.
Then there is virCommandAddArgPair() which also has
ATTRIBUTE_NONNULL() for one of its arguments and then checks the
argument for being NULL anyways.
Signed-off-by:Bihong Yu <yubihong@huawei.com>
Reviewed-by:Chuan Zheng <zhengchuan@huawei.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Commit b50a8354f6 added call to qemuDomainDiskBlockJobIsSupported prior
to filling the 'disk' variable resulting in a crash when attempting a
block commit.
https://gitlab.com/libvirt/libvirt/-/issues/31
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Juan Quintela noticed that when he restarted libvirt he was getting
extra iptables rules added by libvirt even though he didn't have any
libvirt networks that used iptables rules. It turns out this also
happens if the firewalld service is restarted. The extra rules are
just the private chains, and they're sometimes being added
unnecessarily because they are added separately in a global
networkPreReloadFirewallRules() that does the init if there are any
active networks, regardless of whether or not any of those networks
will actually add rules to the host firewall.
The fix is to change the check for "any active networks" to instead
check for "any active networks that add firewall rules".
(NB: although the timing seems suspicious, this isn't a new regression
caused by the recently pushed f5418b427 (which forces recreation of
private chains when firewalld is restarted); it was an existing bug
since iptables rules were first put into private chains, even after
commit c6cbe18771 delayed creation of the private chains. The
implication is that any downstream based on v5.1.0 or later that cares
about these extraneous (but harmless) private chains would want to
backport this patch (along with the other two if they aren't already
there))
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
If virDomainUpdateDeviceFlags() was used to update an <interface>, and
the interface type changed from type='network' where the network was
an unmanaged bridge (so actualType == bridge) to type='bridge'
(i.e. actualType *also* == bridge), the update would fail due to the
perceived change in type.
In practice it is okay to switch between any interface types that end
up using a tap device, since libvirt just needs to attach the device
to a new bridge. But in this case we were erroneously rejecting it due
to a conditional that was too restrictive. This is what the code was doing:
if (old->type != new->type)
[allow update]
else
if ((oldActual == bridge and newActual == network)
|| (oldActual == network and newActual == bridge)) {
[allow update]
else
[error]
In the case described above though, old->type and new->type don't match,
but oldActual and newActual are both 'bridge', so we get an error.
This patch changes the inner conditional so that any combination of
'network' and 'bridge' for oldActual and newActual, since they both
use a tap device connected to a bridge.
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
The previous fix accidentally picked up a debug change that put
alignment back at 4, not 8, bytes as it claimed:
commit 37ae042642
Author: Daniel P. Berrangé <berrange@redhat.com>
Date: Wed Jun 3 11:18:23 2020 +0100
conf: force 8 byte alignment for virObjectEvent
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
We need to be able to cast from virObjectEventPtr to one of
its many subclasses. Some of these subclasses have 8 byte
alignment on 32-bit platforms, but virObjectEventPtr only
has 4 byte alignment.
Previously the virObject base class had 8 byte alignment
but this dropped to 4 byte when converted to inherit from
GObject. This introduces cast alignment warnings on 32-bit:
../../src/conf/domain_event.c: In function 'virDomainEventDispatchDefaultFunc':
../../src/conf/domain_event.c:1656:30: error: cast increases required alignment of target type [-Werror=cast-align]
1656 | rtcChangeEvent = (virDomainEventRTCChangePtr)event;
| ^
../../src/conf/domain_event.c:1785:34: error: cast increases required alignment of target type [-Werror=cast-align]
1785 | balloonChangeEvent = (virDomainEventBalloonChangePtr)event;
| ^
../../src/conf/domain_event.c:1896:35: error: cast increases required alignment of target type [-Werror=cast-align]
1896 | blockThresholdEvent = (virDomainEventBlockThresholdPtr)event;
| ^
../../src/conf/domain_event.c: In function 'virDomainQemuMonitorEventDispatchFunc':
../../src/conf/domain_event.c:1974:24: error: cast increases required alignment of target type [-Werror=cast-align]
1974 | qemuMonitorEvent = (virDomainQemuMonitorEventPtr)event;
| ^
../../src/conf/domain_event.c: In function 'virDomainQemuMonitorEventFilter':
../../src/conf/domain_event.c:2179:20: error: cast increases required alignment of target type [-Werror=cast-align]
2179 | monitorEvent = (virDomainQemuMonitorEventPtr) event;
| ^
Forcing 8-byte alignment on virObjectEventPtr removes the
alignment increase during casts to subclasses.
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
This is convenience macro, use it more. This commit was generated
using the following spatch:
@@
symbol node;
identifier old;
identifier ctxt;
type xmlNodePtr;
@@
- xmlNodePtr old;
+ VIR_XPATH_NODE_AUTORESTORE(ctxt);
...
- old = ctxt->node;
... when != old
- ctxt->node = old;
@@
symbol node;
identifier old;
identifier ctxt;
type xmlNodePtr;
@@
- xmlNodePtr old = ctxt->node;
+ VIR_XPATH_NODE_AUTORESTORE(ctxt);
... when != old
- ctxt->node = old;
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
This reverts b897973f2e
Even though it may have been the case in the past, relative
XPaths don't overwrite the ctxt->node. Thus, there's no need to
save it.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Similar to commits 55ce656463 and 6c17606b7c in the qemu driver, make
separate copies of persistent and live device config and normalize the MAC
address between the two. This avoids having different MAC address for the
persistent and live config, ensuring the device has the same address when
the persistent config takes affect after a VM restart.
Signed-off-by: Jim Fehlig <jfehlig@suse.com>
Reviewed-by: Laine Stump <laine@redhat.com>
To avoid bugs with mixing of g_object_(ref|unref) vs
virObject(Ref|Unref), we want every virObject to be
a GObject.
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Memory allocated using g_object_new must never be released using
VIR_FREE/g_free because g_object_new uses a special allocation
strategy internally.
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
The ref count will be private to the GObject base class
and we must not peek at it, even for debugging messages.
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
GObject has an arbitrary limit on the object struct size of 0xffff
bytes. It is expected that any large fields be separately allocated.
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
To prepare for a conversion to GObject, we need virObjectUnref
to have the same API design as g_object_unref, which means it
needs to be void.
A few places do actually care about the return value though,
and in these cases a thread local flag is used to determine
if the dispose method was invoked.
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Some, but not all, of the monitor event handlers check
the virObjectUnref return value to see if the domain
was disposed.
It should not be possible for this to happen, since
the function already holds a lock on the domain and
has only just acquired an extra reference on the
domain a few lines earlier.
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Upon migration with disks, libvirt determines if each disk exists
on the destination and tries to pre-create missing ones. Well,
NVMe disks can't be pre-created, but they can be checked for
presence.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1823639
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
According to the context, here we are checking net->downscript's validity,
Signed-off-by: Liao Pingfang <liao.pingfang@zte.com.cn>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
If built without attr support removing any image will trigger
qemuBlockRemoveImageMetadata (the one that emits the warning)
-> qemuSecurityMoveImageMetadata
-> virSecurityManagerMoveImageMetadata
-> virSecurityDACMoveImageMetadata
-> virSecurityDACMoveImageMetadataHelper
-> virProcessRunInFork (spawns subprocess)
-> virSecurityMoveRememberedLabel
In there due to !HAVE_LIBATTR virFileGetXAttrQuiet will return
ENOSYS and from there the chain will error out.
That is wrong and looks like:
libvirtd[6320]: internal error: child reported (status=125):
libvirtd[6320]: Unable to remove disk metadata on vm testguest from
/var/lib/uvtool/libvirt/images/testguest.qcow (disk target vda)
This change makes virSecurityDACMoveImageMetadataHelper and
virSecuritySELinuxMoveImageMetadataHelper accept that
error code gracefully and in that sense it is an extension of:
5214b2f1a3 "security: Don't skip label restore on file systems lacking XATTRs"
which does the same for other call chains into the virFile*XAttr functions.
Signed-off-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Support downscript for booting vm,
and hotunplug interface device.
Signed-off-by: Chen Hanxiao <chen_han_xiao@126.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
The stepping range (10-11) is likely incomplete. QEMU uses 10 and the
CPUID data for Cooperlake show 11. We will update the range if needed
once more details about he CPU are available.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Commit v3.10.0-182-g237f045d9a ("qemu: Ignore fallback CPU attribute
on reconnect") forced CPU 'fallback' to ALLOW, regardless of user
choice. This fixed a situation in which guests created with older
Libvirt versions, which used CPU mode 'host-model' in runtime, would
fail to launch in a newer Libvirt if the fallback was set to FORBID.
This would lead to a scenario where the CPU was translated to 'host-model'
to 'custom', but then the FORBID setting would make the translation
process fail.
PSeries can operate with 'host-model' in runtime due to specific PPC64
mechanics regarding compatibility mode. The update() implementation of
the cpuDriverPPC64 driver is a NO-OP if CPU mode is 'host-model', and
the driver does not implement translate(). The commit mentioned above
is causing PSeries guests to get their 'fallback' setting to ALLOW,
overwriting user choice, exposing a design problem in
qemuProcessRefreshCPU() - for PSeries guests, handling 'host-model'
as it is being done does not apply.
All other cpuArchDrivers implements update() and changes guest mode
to VIR_CPU_MODE_CUSTOM, meaning that PSeries is currently the only
exception to this logic. Let's make it official.
https://bugzilla.redhat.com/show_bug.cgi?id=1660711
Suggested-by: Jiri Denemark <jdenemar@redhat.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Message-Id: <20200525123945.4049591-2-danielhb413@gmail.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
The host CPU related info stored in the capabilities cache is no longer
valid after the host CPU changes. This is not a frequent situation in
real world, but it can easily happen in nested scenarios when a disk
image is started with various CPUs.
https://bugzilla.redhat.com/show_bug.cgi?id=1778819
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
The purpose of this function is to give a short description that would
be change when a host CPU is replaced with a different model. This is
currently implemented by reading /proc/cpuinfo.
It should be implemented for all architectures for which the QEMU driver
stores host CPU data in the capabilities cache. In other words for archs
that support host-model CPUs.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Use automatic cleanup on qemuProcessUpdateCPU and the functions called
by it.
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Message-Id: <20200522195620.3843442-5-danielhb413@gmail.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
The intention of these split Load*Entry functions is to prevent
virQEMUDriverConfigLoadFile from getting too large.
There's no need to signal to the caller whether an entry was found
or not, only whether there was an error.
Remove the non-standard return 1.
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
virConfGetValueString returns an allocated string that needs to be
freed.
Fixes: 34a59fb570
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
qemuxml2argv test suite is way more comprehensive than the hotplug
suite. Since we share the code paths for monitor and command line
hotplug we can easily test the properties of devices against the QAPI
schema.
To achieve this we'll need to skip the JSON->commandline conversion for
the test run so that we can analyze the pure properties. This patch adds
flags for the comand line generator and hook them into the
JSON->commandline convertor for -netdev. An upcoming patch will make use
of this new infrastructure.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Now that all code paths generate JSON props we can remove the conversion
to command line arguments and back in the monitor code.
Note that the test which is removed in this commit will be replaced by a
stronger testsuite later.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Syntax of guestfwd channel also needs to be modified to conform to the
QAPI schema.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
QEMU models guestfwd as:
'guestfwd': [
{ "str": "tcp:10.0.2.1:4600-chardev:charchannel0" },
{ "str": "...."},
]
but the command line as:
guestfwd=tcp:10.0.2.1:4600-chardev:charchannel0,guestfwd=...
I guess the original idea was to make it extensible while not worrying
about adding another object for it. Either way it requires us to add yet
another JSON->cmdline convertor for arrays.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
The 'netdev_add' command was recently formally described in qemu via the
QMP schema. This means that it also requires the arguments to be
properly formatted. Our current approach is to generate the command line
and then use qemuMonitorJSONKeywordStringToJSON to get the JSON
properties for the monitor. This will not work if we need to pass some
fields as numbers or booleans.
In this step we re-do internals of qemuBuildHostNetStr to format a JSON
object which is converted back via virQEMUBuildNetdevCommandlineFromJSON
to the equivalent command line. This will later allow fixing of the
monitor code to use the JSON object directly rather than rely on the
conversion.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
In preparation for converting the generator of -netdev to generate JSON
which will be used to do the command line rather than the other way
around we need to introduce a convertor which properly configures
virQEMUBuildCommandLineJSON for the quirks of -netdev.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Use automatic pointer cleanup for virJSONValuePtrs to get rid of the
cleanup label and ret variable.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Add a variant similar to virJSONValueObjectAppendString which also
formats more complex value strings with printf syntax.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
The helper returns a list of arguments of a virCommand. This will be
useful in tests where we'll inspect certain already formatted arguments.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
In some cases we use 'on/off' for command line arguments. Add a switch
which will select the preferred spelling for a specific usage.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Allow reusing this for formatting of netdev_add arguments into -netdev.
We need to be able to skip the 'type' property as it's used without the
prefix by our generator.
Add infrastructure which allows skipping property with a specific name.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
In qemu the argument of 'ipv6-net' is split up into 'ipv6-prefix' and
'ipv6-prefixlen'. Additionally now that 'netdev_add' was qapified, only
the real properties are allowed. Switch to using them explicitly.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
The output of the function is fed as argument to '-device' command line
argument or 'device_add' monitor command except for 'guestfwd' channels
where it needs to be fed to -netdev/netdev_add. This is confusing and
error prone. Split it up since the caller needs to know which
command/option to use anyways, so the caller can call the appropriate
function without any magic.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Both active branches create the same backend chardev. Since there is no
other case, extract it before the switch so that we don't have to
duplicate it.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
'tftp' storage protocol was supported by qemu until 2.7.0. Add an
interlock when blockdev is used and drop the test case for it as it's
IMO not worth adding another test file just for that.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
The qemu.conf change broke our augeas test:
qemu/test_libvirtd_qemu.aug:96.3-203.1:exception thrown in test
qemu/test_libvirtd_qemu.aug:96.8-.34:exception: Iterated lens matched less than it should
Lens: ../../src/qemu/libvirtd_qemu.aug:170.13-.43:
Last match: ../../src/qemu/libvirtd_qemu.aug:18.52-.113:
Not matching: ../../src/qemu/libvirtd_qemu.aug:12.19-.31:
Error encountered at 48:27 (1615 characters into string)
<\n "/dev/ptmx", "/dev/kvm"|=|,\n]\nsave_image_format = "raw>
Fixes: ab5ba57012
Signed-off-by: Ján Tomko <jtomko@redhat.com>
The RTC and HPET modes for the QEMU emulation tick have been dropped
almost 9 years ago, in commit 25f3151ece1d5881826232bebccc21b588d4e03e.
Do not allow them in the devices cgroup policy.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Although the original patches to support controllers with
hotplug='off' were checking during hotplug/attach requests that the
device was being plugged into a PCI controller that didn't have
hotplug disabled, but I forgot to do the same for device detach (the
main impetus for adding the feature was to prevent unplugs originating
from within the guest, so it slipped my mind). So although the guest
OS was ultimately unable to honor the unplug request, libvirt could
still be used to make such a request, and since device attach/detach
are asynchronous operations, the caller to libvirt would receive a
success status back (the device would stubbornly/correctly remain in
the domain status XML however)
This patch remedies that, by looking at the controller for the device
in the detach request, and immediately failing the operation if that
controller has hotplug=off.
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
If the mirror destination is not a file but a NVMe disk, then
call qemuHostdevReAttachOneNVMeDisk() to reattach the NVMe back
to the host.
This would be done by blockjob code when the job finishes, but in
this case the job won't finish - QEMU is killed meanwhile.
Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1825785
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
In v5.10.0-rc1~42 (which was later fixed in v6.0.0-rc1~487) I am
removing XATTRs for a file that QEMU is mirroring a disk into but
it is killed meanwhile. Well, we can call
qemuSecurityRestoreImageLabel() which will not only remove XATTRs
but also use them to restore the original owner of the file.
This would be done by blockjob code when the job finishes, but in
this case the job won't finish - QEMU is killed meanwhile
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Use g_new0 to allocate and remove NULL checks from callers
and the lock will release properly
Signed-off-by: Yi Li <yili@winhong.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
In previous commit we started tracking whether QEMU supports
'-numa mem='. This is tied to the machine type because migration
from '-numa mem=' to '-numa memdev' is impossible (or vice
versa). But since it's tied to a machine type (where migration
from one to another is also unsupported) we can allow QEMU to get
rid of the deprecated command line.
Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1783355
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
When building -numa command line there is a for() loop that
builds '-numa memdev=' for each guest NUMA node. And also
records in a local variable whether any of memory-object-*
backends must be used to satisfy desired config. Well, instead of
checking in each iteration whether corresponding capabilities are
set, we can do swap if() and for() and check only once.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
There is 'numa-mem-supported' machine attribute which specifies
whether '-numa mem=' is supported. Store it in our capabilities
as it will be used in later commits when building the command
line.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
The AppArmor secdriver does not use labels to grant access to
resources. Therefore, it doesn't use XATTRs and hence it lacks
implementation of .domainMoveImageMetadata callback. This leads
to a harmless but needless error message appearing in the logs:
virSecurityManagerMoveImageMetadata:476 : this function is not
supported by the connection driver: virSecurityManagerMoveImageMetadata
Closes: https://gitlab.com/libvirt/libvirt/-/issues/25
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
The documented enum and its values do not exits. The real enum has
slightly different name.
Signed-off-by: Tomáš Golembiovský <tgolembi@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Introduce vendors and some commonly used models
for ARM arch, these will be used for virConnectionGetCapabilities
for ARM CPUs.
Signed-off-by: Zhenyu Zheng <zheng.zhenyu@outlook.com>
Message-Id: <TY2PR01MB3113973DDB36C7A5E18F451299BF0@TY2PR01MB3113.jpnprd01.prod.outlook.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
Introduce getHost support for ARM CPU driver,
read CPU vendor_id, part_id and flags from
registers directly. These codes will only be
compiled on aarch64 hardware.
Signed-off-by: Zhenyu Zheng <zheng.zhenyu@outlook.com>
Message-Id: <TY2PR01MB311380AFE294266B4E87B85699BF0@TY2PR01MB3113.jpnprd01.prod.outlook.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
Add helper functions to parse vendor and model for
ARM CPUs, and use them as callbacks when load cpu
maps.
Signed-off-by: Zhenyu Zheng <zheng.zhenyu@outlook.com>
Message-Id: <TY2PR01MB3113C158B8C2822E75DB5EAE99BF0@TY2PR01MB3113.jpnprd01.prod.outlook.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
Introduce virCPUarmData to virCPUData and related
structs to cpu_arm.c for ARM cpus.
Signed-off-by: Zhenyu Zheng <zheng.zhenyu@outlook.com>
Message-Id: <TY2PR01MB31130D12A95144FF88C1E32499BF0@TY2PR01MB3113.jpnprd01.prod.outlook.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
The structure is not specific to x86 and thus its cleanup function
should be defined in cpu.h and be available to all users.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
==179663== 35 (24 direct, 11 indirect) bytes in 1 blocks are definitely lost in loss record 205 of 461
==179663== at 0x4839EC6: calloc (vg_replace_malloc.c:762)
==179663== by 0x5791AC0: g_malloc0 (in /usr/lib64/libglib-2.0.so.0.6400.1)
==179663== by 0x190C79: qemuDomainObjPrivateXMLParseBlockjobDataCommit (qemu_domain.c:3295)
==179663== by 0x190DF7: qemuDomainObjPrivateXMLParseBlockjobDataSpecific (qemu_domain.c:3331)
==179663== by 0x19157D: qemuDomainObjPrivateXMLParseBlockjobData (qemu_domain.c:3469)
==179663== by 0x1918E8: qemuDomainObjPrivateXMLParseBlockjobs (qemu_domain.c:3498)
==179663== by 0x193841: qemuDomainObjPrivateXMLParse (qemu_domain.c:3944)
==179663== by 0x4A1BA9D: virDomainObjParseXML (domain_conf.c:22306)
==179663== by 0x4A1BFE9: virDomainObjParseNode (domain_conf.c:22429)
==179663== by 0x4A1C0B4: virDomainObjParseFile (domain_conf.c:22443)
==179663== by 0x1431E1: testCompareStatusXMLToXMLFiles (qemuxml2xmltest.c:61)
==179663== by 0x177722: virTestRun (testutils.c:142)
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
==156803== 58 (40 direct, 18 indirect) bytes in 1 blocks are definitely lost in loss record 306 of 463
==156803== at 0x4839EC6: calloc (vg_replace_malloc.c:762)
==156803== by 0x5791AC0: g_malloc0 (in /usr/lib64/libglib-2.0.so.0.6400.1)
==156803== by 0x48F60DC: virAlloc (viralloc.c:48)
==156803== by 0x18DD74: qemuStorageSourcePrivateDataAssignSecinfo (qemu_domain.c:2384)
==156803== by 0x18DFD5: qemuStorageSourcePrivateDataParse (qemu_domain.c:2433)
==156803== by 0x49EC884: virDomainStorageSourceParse (domain_conf.c:9857)
==156803== by 0x49ECBA3: virDomainDiskBackingStoreParse (domain_conf.c:9909)
==156803== by 0x49F129D: virDomainDiskDefParseXML (domain_conf.c:10785)
==156803== by 0x4A1804E: virDomainDefParseXML (domain_conf.c:21543)
==156803== by 0x4A1B60C: virDomainObjParseXML (domain_conf.c:22254)
==156803== by 0x4A1BFE9: virDomainObjParseNode (domain_conf.c:22429)
==156803== by 0x4A1C0B4: virDomainObjParseFile (domain_conf.c:22443
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
A failure in qemuProcessLaunch would lead to qemuExtDevicesStop
being called twice - once in the cleanup section and then again
in qemuProcessStop.
However, the first one is called while the QEMU process is
still running, which is too soon for the swtpm process, because
the swtmp_ioctl command can lock up:
https://bugzilla.redhat.com/show_bug.cgi?id=1822523
Remove the first call and only leave the one in qemuProcessStop,
which is called after the QEMU process is killed.
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
The @tmpIfname is a pointer into a const string. To avoid
mistakenly changing the const string via the pointer, make the
pointer const too.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
This is not yet supported by virtiofsd.
Fixes#23 a.k.a. https://gitlab.com/libvirt/libvirt/-/issues/23
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Andrea Bolognani <abologna@redhat.com>
It was never used since commit 57b5e27d3d introduced it.
Signed-off-by: Yan Wang <wangyan122@huawei.com>
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Availability of the vmpvscsi controller model is gated by the pvscsi
capability.
Signed-off-by: Chris Jester-Young <cky@cky.nz>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
This capability flags support for `-device pvscsi`, which provides the
VMware paravirtual SCSI controller.
Signed-off-by: Chris Jester-Young <cky@cky.nz>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
'blockdev-mirror' requires the write permission internally to do the
copy. This means that we have to force the image to be read-write for
the duration of the copy and can fix it after the copy is done.
https://bugzilla.redhat.com/show_bug.cgi?id=1832204
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
With -blockdev or when reusing externally created images and thus
without the need for formatting the image we actually can support
snapshots of read-only disks. Arguably it's not very useful so they are
not done by default but users of libvirt such as oVirt are actually
using this.
https://bugzilla.redhat.com/show_bug.cgi?id=1832204
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
We need qemu to be able to write the newly created images so that it can
format them to the specified storage format.
Force write access by relabelling the images when formatting.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
The 'Create' API of the two storage file backends is used only on
code-paths where we need to format the image after creating an empty
file. Since the DAC security driver only modifies the owner of the file
and not the mode we need to create all files which are going to be
formatted with the write bit set for the user.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Remember the preferred placement of <auth> and <encryption> for a disk
source across libvirtd restarts.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Modern way to store <auth> and <encryption> of a <disk> is under
<source>. This was added to mirror how <backingStore> handles these and
in fact they are relevant to the source rather than to any other part of
the disk. Historically we allowed them to be directly under <disk> and
we need to keep compatibility.
This wasn't a problem until introduction of -blockdev in qemu using of
<auth> or <encryption> plainly wouldn't work with backing chains.
Now that it works in backing chains and can be moved back and forth
using snapshots/block-commit we need to ensure that the original
placement is properly kept even if the source changes.
To achieve the above semantics we need to store the preferred placement
with the disk definition rather than the storage source definitions and
also ensure that the modern way is chosen when the VM started with
<source/encryption> only in the backing store.
https://bugzilla.redhat.com/show_bug.cgi?id=1822878
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Any non-raw block layer feature will not work with raw SCSI command
passthrough via 'scsi-block'. Explicitly refuse use of luks encryption,
storage slices and copy on read.
https://bugzilla.redhat.com/show_bug.cgi?id=1820040
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Historically the virtio-blk frontend by default enabled SCSI emulation
and tried to do SCSI command passthrough. As this was enabled by default
there's a fallback mechanism in place in cases when the backend doesn't
support SCSI for any reason.
This is not the case when disk type=lun is used with 'scsi-block' via
'virtio-scsi'.
We did not restrict configurations when the user picks 'qcow2' or any
other format as format of the disk, in which case the emulation is
disabled as such configuration doesn't make sense.
This patch unifies the approach so that 'raw' is required both when used
via 'virtio-blk' and 'virtio-scsi' so that the user is presented with
the expected configuration. Note that use of <disk type='lun'> is
already very restrictive as it requires a block device or iSCSI storage.
Additionally the scsi emulation is now deprecated by qemu with
virtio-blk as it conflicts with virtio-1 and the alternative is to use
'virtio-scsi' which performs better and is along for a very long time.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
The property was deprecated. Don't format it based on the new capability
if the user didn't explicitly request it.
https://bugzilla.redhat.com/show_bug.cgi?id=1829550
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Historically the 'scsi' passthrough feature of virtio-blk-pci
was enabled by default. Libvirt was disabling it due to security
implications outlined in libvirt commit v0.9.9-4-g177db08775 if it was
not explicitly requested. In qemu commit v2.4.0-1566-ged65fd1a27 the
default value was changed to disabled in preparation for virtio-1.
Starting from QEMU-5.0 the 'scsi' property was also deprecated. There
replacement for the functionality is to use 'virtio-scsi' for the
purpose. This isn't a direct replacement though.
Add capability named QEMU_CAPS_VIRTIO_BLK_SCSI_DEFAULT_DISABLED which
allows us to stop formatting the 'scsi=' property if it's disabled by
default and not requested so that we don't use deprecated features.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
QEMU-5.0 added 'default-value' field for any applicable property
returned by 'device-list-properties'. Add an optional callback for any
device property definition which will allow detection of features and
default values based on this new data.
This unfortunately means that the description of properties had to move
from the slightly-too-generic 'struct virQEMUCapsStringFlags' to a new
type (virQEMUCapsDevicePropsFlags) which also has the callback property
and the corresponding change in the initializers.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Create a hash table of device property names which also stores the
corresponding JSON object so that the detection code can look at the
recently added 'default-value' field and possibly others.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Use automatic cleanup of variables and current style of header.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
virQEMUCapsProbeQMPGenericProps is used only in one place now. Move the
code directly to virQEMUCapsProbeQMPObjectTypes.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Reimplement device property detection directly rather than using
virQEMUCapsProbeQMPGenericProps in preparation for changes to the
detection code.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
The function was parsing 'qom-list-types' and then also calling function
which parses 'device-list-properties' and also 'qom-list-properties'.
Split it up into individual functions.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Help QEMU in deprecation of -drive if=none without the need to refactor
all old boards. Stop masking out -blockdev support when -drive if=sd
needs to be used. We achieve this by forbidding blockjobs and
special-casing all other code paths. Blockjobs are sacrificed in this
case as SD cards are a corner case for some ARM boards and are thus not
used commonly.
https://bugzilla.redhat.com/show_bug.cgi?id=1821692
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
SD cards need to be instantiated via -drive if=sd. This means that all
cases where we use the blockdev path need to be special-cased for SD
cards.
Note that at this point QEMU_CAPS_BLOCKDEV is still cleared if the VM
config has a SD card.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Use the drive alias for all cases when we can't generate qomName. This
is meant to handle disks on 'sd' bus which are instantiated via -drive
if=sd as there isn't any specific QOM name for them.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
We still have to use -drive to instantiate sd disks. Combining that with
the new logic for blockjobs would be very complicated and not worth it
given that 'sd' cards work only on few rarely used machine types of
non-common architectures and libvirt didn't implement support for 'sd'
bus controllers. This will allow us to use -blockdev for other kinds on
such machines while sacrificing block jobs.
Note: this is currently no-op as we mask-out the QEMU_CAPS_BLOCKDEV
capability if any of the disks has bus='sd'.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
We can't set the type of the device on the 'sd' bus and realistically a
cdrom doesn't even make sense there. Forbid it.
Note that the output of in disk-cdrom-bus-other.x86_64-latest.args
switched to blockdev as it's no longer locked out due to use of a disk
on 'sd' bus.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
In case of 'sd' cards we'll use pre-blockdev code also if qemu supports
blockdev. In that specific case we'll need to mask out blockdev support
for 'sd' disks. Plumb in a boolean to allow it.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Make sure that we don't try to reload node names with -blockdev. If
something doesn't have a node name the update will not make the
situation better.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
There are no users for the qemu-specific enum values. Remove it.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
There's no point using the qemu-specific disk bus names in the error
message.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Remove all the universal code since the 'else' part formats commandline
only for the SD card based disk. Note that we can use virDiskNameToIndex
without the check as we already validate that 'disk->dst' contains a
properly formatted string in the validation code.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
For 'SD' disks and floppies in the pre-blockdev era we don't format
-device. Extract the logic so that it's more clear and add comments.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
The function effectively boils down to whether the disk is 'SD'. Since
we'll need to make more decisions based on the fact whether the disk is
on the SD bus, rename the function.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Remove the function and passing of 'def' through the callers.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Previously we've validated it in qemuCheckDiskConfig which was directly
called from the command line generator. Move the checks to the validator
where they belong.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Move the code from qemuCheckDiskConfigBlkdeviotune in
src/qemu/qemu_commandline.c to
qemuValidateDomainDeviceDefDiskBlkdeviotune.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Agregate validation of frontend properties in a new function called
qemuValidateDomainDeviceDefDiskFrontend.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
When firewalld is stopped, it removes *all* iptables rules and chains,
including those added by libvirt. Since restarting firewalld means
stopping and then starting it, any time it is restarted, libvirt needs
to recreate all the private iptables chains it uses, along with all
the rules it adds.
We already have code in place to call networkReloadFirewallRules() any
time we're notified of a firewalld start, and
networkReloadFirewallRules() will call
networkPreReloadFirewallRules(), which calls
networkSetupPrivateChains(); unfortunately that last call is called
using virOnce(), meaning that it will only be called the first time
through networkPreReloadFirewallRules() after libvirtd starts - so of
course when firewalld is later restarted, the call to
networkSetupPrivateChains() is skipped.
The neat and tidy way to fix this would be if there was a standard way
to reset a pthread_once_t object so that the next time virOnce was
called, it would think the function hadn't been called, and call it
again. Unfortunately, there isn't any official way of doing that (we
*could* just fill it with 0 and hope for the best, but that doesn't
seem very safe.
So instead, this patch just adds a static variable called
chainInitDone, which is set to true after networkSetupPrivateChains()
is called for the first time, and then during calls to
networkPreReloadFirewallRules(), if chainInitDone is set, we call
networkSetupPrivateChains() directly instead of via virOnce().
It may seem unsafe to directly call a function that is meant to be
called only once, but I think in this case we're safe - there's
nothing in the function that is inherently "once only" - it doesn't
initialize anything that can't safely be re-initialized (as long as
two threads don't try to do it at the same time), and it only happens
when responding to a dbus message that firewalld has been started (and
I don't think it's possible for us to be processing two of those at
once), and even then only if the initial call to the function has
already been completed (so we're safe if we receive a firewalld
restart call at a time when we haven't yet called it, or even if
another thread is already in the process of executing it. The only
problematic bit I can think of is if another thread is in the process
of adding an iptable rule at the time we're executing this function,
but 1) none of those threads will be trying to add chains, and 2) if
there was a concurrency problem with other threads adding iptables
rules while firewalld was being restarted, it would still be a problem
even without this change.
This is yet another patch that fixes an occurrence of this error:
COMMAND_FAILED: '/usr/sbin/iptables -w10 -w --table filter --insert LIBVIRT_INP --in-interface virbr0 --protocol tcp --destination-port 67 --jump ACCEPT' failed: iptables: No chain/target/match by that name.
In particular, this resolves: https://bugzilla.redhat.com/1813830
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
networkSetupPrivateChains() is currently called only once per run of
libvirtd, so it can assume that errInitV4 and errInitV6 are empty/null
when it is called. In preparation for potentially calling this
function multiple times during one run, this patch moves the reset of
errInitV[46] to the top of the function, to assure no memory is
leaked.
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
As suggested in the linked bug, libvirt should firstly check
whether the major number of the device is device mapper major.
Because if it isn't subsequent DM_DEVICE_DEPS task may not only
fail, but also yield different results. In the bugzilla this is
demonstrated by creating a devmapper target named 'loop0' and
then creating loop target /dev/loop0. When the latter is then
passed to a domain, our virDevMapperGetTargetsImpl() function
blindly asks devmapper to provide target dependencies for
/dev/loop0 and because of the way devmapper APIs work, it will
'sanitize' the input by using the last component only which is
'loop0' and thus return different results than expected.
Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1823976
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
We have a framework to register cleanup callbacks that are run
when a domain is shut down. The idea is to run callbacks in
reverse order than they were registered. However, looking at the
code this is not the case. Fortunately, this framework is used to
register a single callback and a single callback only -
qemuMigrationDstPrepareCleanup() - therefore there was no problem
just yet.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
When no video device is specified in config we should set both
hvm.nographic to 1 and hvm.vga.kind to NONE.
Without hvm.vga.kind=LIBXL_VGA_INTERFACE_TYPE_NONE both -nographic and
-device 'cirrus-vga' are on qemu cmdline.
Signed-off-by: Artur Puzio <contact@puzio.waw.pl>
Reviewed-by: Jim Fehlig <jfehlig@suse.com>
We need this for all tests that use virHostdevManager, because
during creation of this object for unprivileged connections
like those used in the test suite we would end up writing inside
the user's home directory.
That's bad manners in general, but when running the test suite
inside a purposefully constrained environment such as the one
exposed by pbuilder, it turns into an outright test failure:
Could not initialize HostdevManager - operation failed: Failed
to create state dir '/nonexistent/.cache/libvirt/hostdevmgr'
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
We never supported host-model CPUs on ARM and we don't want to support
them even once patches for direct detection of host CPU are merged. And
since using host CPU definition for host-model CPUs exists only for
backward compatibility, we should not use it for any host-model support
added in the future. Such enhancement should exclusively use the result
of query-cpu-model-expansion. Until proper host-model support is
implemented for ARM (if ever), we need to make sure the detected host
CPU is not accidentally used for host-model CPUs.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
When a system has enabled the iptables/ip6tables services rather than
firewalld, there is no explicit ordering of the start of those
services vs. libvirtd. This creates a problem when libvirtd.service is
started before ip[6]tables, as the latter, when it finally is started,
will remove all of the iptables rules that had previously been added
by libvirt, including the custom chains where libvirt's rules are
kept. This results in an error message similar to the following when a
user subsequently tries to start a new libvirt network:
"Error while activating network: Call to virNetworkCreate failed:
internal error: Failed to apply firewall rules
/usr/sbin/ip6tables -w --table filter --insert LIBVIRT_FWO \
--in-interface virbr2 --jump REJECT:
ip6tables: No chain/target/match by that name."
(Prior to logging this error, it also would have caused failure to
forward (or block) traffic in some cases, e.g. for guests on a NATed
network, since libvirt's rules to forward/block had all been deleted
and libvirt didn't know about it, so it couldn't fix the problem)
When this happens, the problem can be remedied by simply restarting
libvirtd.service (which has the side-effect of reloading all
libvirt-generated firewall rules)
Instead, we can just explicitly stating in the libvirtd.service file
that libvirtd.service should start after ip6tables.service and
ip6tables.service, eliminating the race condition that leads to the
error.
There is also nothing (that I can see) in the systemd .service files
to guarantee that firewalld.service will be started (if enabled) prior
to libvirtd.service. The same error scenario given above would occur
if libvirtd.service started before firewalld.service. Even before
that, though libvirtd would have detected that firewalld.service was
disabled, and then turn off all firewalld support. So, for example,
firewalld's libvirt zone wouldn't be used, and most likely traffic
from guests would therefore be blocked (all with no external
indication of the source of the problem other than a debug-level log
when libvirtd was started saying that firewalld wasn't in use); also
libvirtd wouldn't notice when firewalld reloaded its rules (which also
simultaneously deletes all of libvirt's rules).
I'm not aware of any reports that have been traced back to
libvirtd.service starting before firewalld.service, but have seen that
error reported multiple times, and also don't see an existing
dependency that would guarantee firewalld.service starts before
libvirtd.service, so it's possible it's been happening and we just
haven't gotten to the bottom of it.
This patch adds an After= line to the libvirtd.service file for each
of iptables.service, ip6tables.service, and firewalld.servicee, which
should guarantee that libvirtd.service isn't started until systemd has
started whichever of the others is enabled.
This race was diagnosed, and patch proposed, by Jason Montleon in
https://bugzilla.redhat.com/1723698 . At the time (April 2019) danpb
agreed with him that this change to libvirtd.service was a reasonable
thing to do, but I guess everyone thought someone else was going to
post a patch, so in the end nobody did.
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
The libxl driver has suffered an identity crisis since its introduction.
It took on the name 'libxl' since at the time libvirt already contained
a 'xen' driver for the old Xen toolstack implementation. 'libxl' is short
for libxenlight, which is often called xenlight. Unfortunately all forms
of the name are used in the libxl driver.
The only remaining use of the 'xenlight' form is when interacting with
the host device manager, which is difficult to change since it would
cause problems when upgrading the driver.
Rename the #define to make it clear the 'xenlight' form is internal and
add a comment describing why the name exists and that its use should be
discouraged.
Signed-off-by: Jim Fehlig <jfehlig@suse.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
The libxl driver declares its name as 'Xen' through the public
virConnectGetType() API. In the virHypervisorDriver table the name is
set to 'xenlight'. To add more confusion, the name is set to 'LIBXL'
in the virStateDriver. For consistency, use the same name in the driver
tables as reported in the public virConnectGetType() API.
Signed-off-by: Jim Fehlig <jfehlig@suse.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
The virConnectGetType() returns "Xen" for libxl, not "LIBXL".
This prevents users opening a connection to the libxl driver when using
the modular daemons.
Reviewed-by: Jim Fehlig <jfehlig@suse.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
In a few places we use 0 and false, or 1 and true interchangeably
even though the variable or return type in question is boolean.
Fix those places.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
There are few places where a return variable is introduced (ret
or retval), but then is never changed and is then passed to
return. Well, we can return the value that the variable is
initialized to directly.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
There are few functions that currently return an integer but in
fact they always return the same integer (zero). Make them void.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
