Use automatic memory freeing to remove the 'cleanup:' label and 'ret'
variable.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Use automatic memory freeing and remove the 'cleanup' label and 'ret'
variable.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
This allows simplification of the caller as well as will enable a later
refactor of qemuMonitorJSONMakeCommandInternal.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
The lookup didn't do anything apart from comparing the sysfs paths
anyway since that's what makes each mdev unique.
The most ridiculous usage of the old logic was in
virHostdevReAttachMediatedDevices where in order to drop an mdev
hostdev from the list of active devices we first had to create a new
mdev and use it in the lookup call. Why couldn't we have used the
hostdev directly? Because the hostdev and mdev structures are
incompatible.
The way mdevs are currently removed is via a write to a specific sysfs
attribute. If you do it while the machine which has the mdev assigned
is running, the write call may block (with a new enough kernel, with
older kernels it would return a write error!) until the device
is no longer in use which is when the QEMU process exits.
The interesting part here comes afterwards when we're cleaning up and
call virHostdevReAttachMediatedDevices. The domain doesn't exist
anymore, so the list of active hostdevs needs to be updated and the
respective hostdevs removed from the list, but remember we had to
create an mdev object in the memory in order to find it in the list
first which will fail because the write to sysfs had already removed
the mdev instance from the host system.
And so the next time you try to start the same domain you'll get:
"Requested operation is not valid: mediated device <path> is in use by
driver QEMU, domain <name>"
Fixes: https://gitlab.com/libvirt/libvirt/-/issues/119
Signed-off-by: Erik Skultety <eskultet@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
We set the pointer to some garbage packed structure data without
knowing whether we were actually handling the type of device we
expected to be handling. On its own, this was harmless, because we'd
never use the pointer as we'd skip the device if it were not the
expected type. However, it's better to make the logic even more
explicit - we first check the device and only when we're sure we have
the expected type we then update the pointer shortcut.
Signed-off-by: Erik Skultety <eskultet@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
virDeviceHasPCIExpressLink() wasn't checking that pcie_cap_pos was
valid before attempting to use it, which could lead to reading the
byte at offset 0 + PCI_CAP_ID_EXP instead of [valid offset] +
PCI_CAP_ID_EXP. In particular, this could happen for "integrated" PCI
devices (those that are on the PCIe root complex). If it happened that
the byte from the wrong address had the "right" bit set, then it would
lead to us innappropriately believing that Express Link info was
available when it wasn't, and the node device driver would then log an
error like this:
virPCIDeviceGetLinkCapSta:2754 :
internal error: pci device 0000:00:18.0 is not a PCI-Express device
during a libvirtd restart. (this didn't ever occur until after
virPCIDeviceIsPCIExpress() was made more intelligent in commit
c00b6b1ae, which hasn't yet been in any official release)
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
The two scenarios were found by Coverity after a seemingly-unrelated
change to virLXCProcessSetupInterfaceTap() (in commit ecfc2d5f43), and
explained by John Ferlan here:
https://www.redhat.com/archives/libvir-list/2020-December/msg00810.html
To re-explain:
a) On entry to virLXCProcessSetupInterfaceTap() if net->ifname != NULL
then a copy of net->ifname is made into parentVeth, and a reference
to *that* pointer is sent down to virNetDevVethCreate().
b) If parentVeth (aka net->ifname) is a template name (e.g. "blah%d"),
then virNetDevVethCreate() calls virNetDevGenerateName(), and if
virNetDevGenerateName() successfully generates a usable name
(e.g. "blah27") then it will free the original template string
(which is pointed to by net->ifname and by parentVeth), then
replace the pointer in parentVeth with a pointer to the new
string. Note that net->ifname still points to the now-freed
template string.
c) returning back up to virLXCProcessSetupInterfaceTap(), we check if
net->ifname == NULL - it *isn't* (still contains stale pointer to
template string), so we don't replace it with the pointer to the new
string that is in parentVeth.
d) Result: the new string is leaked once we return from
virLXCProcessSetupInterfaceTap(), while there is a dangling pointer
to the old string in net->ifname.
There is also a leak if there is a failure somewhere between steps (b)
and (c) above - the failure cleanup in virNetDevVethCreate() will only
free the newly-generated parentVeth string if the original pointer was
NULL (narrator: "It wasn't."). But it's a new string allocated by
virNetDevGenerateName(), not the original string from net->ifname, so
it really does need to be freed.
The solution is to make a copy of the entire original string into a
g_autofree pointer, then iff everything is successful we g_free() the
original net->ifname and replace it by stealing the string returned by
virNetDevVethCreate().
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
In all cases *except* when parsing status XML as libvirt is being
restarted, the XML parser will delete any manually specified interface
name (aka "<target dev='blah'/>" aka net->ifname) that could have been
generated by virNetDevGenerateName(). This means that during the setup
when a domain is being started (e.g. during
virLXCProcessSetupInterfaceTap()) it is pointless to call
virNetDevReserveName() with any setting of net->ifname that has come
from the XML parser - it is guaranteed to not fit the pattern of any
auto-generated name, and so the call is just a NOP anyway.
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Due to missing pdpe1gb support in the host CPU data, the CPU is still
incorrectly detected as Westmere-IBRS for host capabilities because we
don't have the option to disable features included in the base model
there.
Signed-off-by: Tim Wiederhake <twiederh@redhat.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
It's obvious the CPU model detection provides strange results, which
will be fixed by adding a new Snowridge CPU model few patches later.
Signed-off-by: Tim Wiederhake <twiederh@redhat.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
When defining/creating a network the bridge name may be filled in
automatically by libvirt (if none provided in the input XML or
the one provided is a pattern, e.g. "virbr%d"). During the
bridge name generation process a candidate name is generated
which is then checked with the rest of already defined/running
networks for collisions.
Problem is, that there is no mutex guarding this critical section
and thus if two threads line up so that they both generate the
same candidate they won't find any collision and the same name is
then stored.
Resolves: https://gitlab.com/libvirt/libvirt/-/issues/78
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Laine Stump <laine@redhat.com>
The @fds member of qemuMonitorFdsetInfo struct is an array and as
such, it's allocated in qemuMonitorJSONQueryFdsetsParse() but not
freed in qemuMonitorFdsetsFree().
Fixes: b8998cc670
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Stanzas like "0%{?fedora} && 0%{?fedora} >= %{min_fedora}" contain
redundant definitions, as "0%{?fedora} >= %{min_fedora}" implies that
"%fedora" is defined and has a value. Thus, we can simplify this.
Signed-off-by: Neal Gompa <ngompa13@gmail.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
This allows for the functionality of cpu-cpuid.py script to be
integrated more naturally in a later patch.
Changes the way this script should be called:
cpu-gather.py -> cpu-gather.py
cpu-gather.py --gather -> cpu-gather.py gather
cpu-gather.py --parse -> cpu-gather.py parse
cpu-gather.py --gather --parse -> cpu-gather.py full
Signed-off-by: Tim Wiederhake <twiederh@redhat.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
Prepare to deduplicate the list of relevant registers for cpuid and
msr information.
Signed-off-by: Tim Wiederhake <twiederh@redhat.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
Prepare to deduplicate the list of relevant registers for cpuid and
msr information.
Signed-off-by: Tim Wiederhake <twiederh@redhat.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
'xmltodict' is a Python module that is not installed by default.
Replace it, so the dependencies of cpu-gather.py do not change
when both scripts are merged.
Signed-off-by: Tim Wiederhake <twiederh@redhat.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
'xmltodict' is a Python module that is not installed by default.
Replace it, so the dependencies of cpu-gather.py do not change
when both scripts are merged.
Signed-off-by: Tim Wiederhake <twiederh@redhat.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
Using 'argparse' for argument handling simplifies merging this script
with cpu-gather.py in a later patch.
Signed-off-by: Tim Wiederhake <twiederh@redhat.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
@tmp that was copied just above is leaked on plain return.
The issue is found by Coverity.
Patch that inroduced a leak:
d4439a6b8 : src: adopt to VIR_DRV_SUPPORTS_FEATURE return -1
Signed-off-by: Nikolay Shirokovskiy <nshirokovskiy@virtuozzo.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Fixes compiler error:
src/qemu/qemu_migration.c:4814:20: error: ‘dstOffline’ may be used
uninitialized in this function [-Werror=maybe-uninitialized]
4814 | if (offline && !dstOffline) {
The commit that introduced the error:
910b94df: qemu: adopt to VIR_DRV_SUPPORTS_FEATURE return -1
Signed-off-by: Nick Shyrokovskiy <nshyrokovskiy@gmail.com>
Changes to a virtio network device such as
<interface type="network">
<model type="virtio"/>
<driver iommu="on" ats="on"/> <!-- this line added -->
...
</interface>
were quietly dismissed by `virsh update-device ... --live`.
Signed-off-by: Tim Wiederhake <twiederh@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Otherwise we can get misleading error messages. One example is when connection
is broken we got "this function is not supported by the connection driver:
virDomainMigrate3" from virDomainMigrate3.
Signed-off-by: Nikolay Shirokovskiy <nshirokovskiy@virtuozzo.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Otherwise in some places we can mistakenly report 'unsupported' error instead
of root cause. So let's handle root cause explicitly from the macro.
Signed-off-by: Nikolay Shirokovskiy <nshirokovskiy@virtuozzo.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Otherwise in some places we can mistakenly report 'unsupported' error instead
of root cause. So let's handle root cause explicitly from the macro.
Signed-off-by: Nikolay Shirokovskiy <nshirokovskiy@virtuozzo.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Otherwise in some places we can mistakenly report 'unsupported' error instead
of root cause. So let's handle root cause explicitly from the macro.
Signed-off-by: Nikolay Shirokovskiy <nshirokovskiy@virtuozzo.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Now that individual child elements allow their children to be
interleaved, let's allow direct children of <filesystem/> to be
interleaved too.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
The <binary/> element of <filesystem/> can have children elements
(<cache/> and <lock/>). Allow them to be interleaved.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Our <filesystem/> element can have <driver/> child element. But
with the way our schema is written it can't be interleaved and
has to go first.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
When an interface has some bandwidth limitation set (it's root
qdisc is htb in that case) but this gets cleared out via public
API call (virDomainSetInterfaceParameters() or
virDomainUpdateDeviceFlags()) then virNetDevBandwidthSet() clears
out whatever qdiscs were set on the interface and kernel places
the default qdisc at the root. What we need to do next is to
replace the root qdisc with the one we want.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1329644
Fixes: 0b66196d86
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
While the code that's setting default qdisc is clever enough to
not overwrite any bandwidth (potentially) set by
virNetDevBandwidthSet() (and thus the root qdisc htb is not
replaced with noqueue), it does print a debug message when that's
the case. It's needless. We can set the root qdisc beforehand and
let virNetDevBandwidthSet() overwrite it.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Some secdrivers (typically SELinux driver) generate unique
dynamic seclabel for each domain (unless a static one is
requested in domain XML). This is achieved by calling
qemuSecurityGenLabel() from qemuProcessPrepareDomain() which
allocates unique seclabel and stores it in domain def->seclabels.
The counterpart is qemuSecurityReleaseLabel() which releases the
label and removes it from def->seclabels. Problem is, that with
current code the qemuProcessStop() may still want to use the
seclabel after it was released, e.g. when it wants to restore the
label of a disk mirror.
What is happening now, is that in qemuProcessStop() the
qemuSecurityReleaseLabel() is called, which removes the SELinux
seclabel from def->seclabels, yada yada yada and eventually
qemuSecurityRestoreImageLabel() is called. This bubbles down to
virSecuritySELinuxRestoreImageLabelSingle() which find no SELinux
seclabel (using virDomainDefGetSecurityLabelDef()) and this
returns early doing nothing.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1751664
Fixes: 8fa0374c5b
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
The only reason why virstoragefile.h needs to be included in virfile.h
is that virFileNBDDeviceAssociate() takes virStorageFileFormat argument.
The function doesn't need the enum value as it converts the value to
string and uses only that.
Change the argument to string which will allow us to remove that
include.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
All these headers are indirectly included provided by virfile.h having
virstoragefile.h which will be removed in the following patch.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
The function doesn't take virStorageSource as argument and has nothing
in common with virStorageSource or storage file.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Function virQEMUBuildQemuImgKeySecretOpts is not used anywhere else
so there is no need to have it in util.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
The last usage outside of tests was removed by commit
<780f8c94ca8b3dee7eb59c1bfbc32f672f965df8>.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
The last user was removed by commit
<40f0e0348dfc84f28a500e262c4953b0d3b44fa0>.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
According to our parser (virDomainTPMDefParseXML()) the version
is an optional attribute and independent of TPM backend type.
Therefore, it's not a choice group, which is what our RNG schema
suggests.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
