There is a family of convenient macros: NULLSTR, NULLSTR_EMPTY,
NULLSTR_STAR, NULLSTR_MINUS which hides ternary operator.
Generated using the following spatch (and its obvious variants):
@@
expression s;
@@
<+...
- s ? s : "<null>"
+ NULLSTR(s)
...+>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Check for the last multipart message right as the first thing. The
presumption probably was that the last message might still contain a
payload we want to parse. However that cannot be true since that would
have to be a type RTM_NEWNEIGH. This was not caught because older
kernels were note sending NLMSG_DONE and probably relied on the fact
that the parsing just stops after all the messages are walked through,
which the NLMSG_OK macro successfully did.
Resolves: https://issues.redhat.com/browse/RHEL-52449
Resolves: https://bugzilla.redhat.com/2302245
Fixes: a176d67cdfaf5b8237a7e3a80d8be0e6bdf2d8fd
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
Reviewed-by: Laine Stump <laine@redhat.com>
The previous check was all wrong since it calculated the how long would
the netlink message be if the netlink header was the payload and then
subtracted that from the whole message length, a variable that was not
used later in the code. This check can fail if there are no additional
payloads, struct rtattr in particular, which we are parsing later,
however the RTA_OK macro would've caught that anyway.
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
Reviewed-by: Laine Stump <laine@redhat.com>
Use convenience macro which does almost the same thing we were doing,
but also pads out the payload length to a multiple of NLMSG_ALIGNTO (4)
bytes.
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
Reviewed-by: Laine Stump <laine@redhat.com>
This brings the tool's list of features in sync with qemu
commit 37fbfda8f4145ba1700f63f0cb7be4c108d545de.
Signed-off-by: Tim Wiederhake <twiederh@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
This adds an option to use libcpuinfo [1] as data source for
libvirt's list of x86 cpu features. This is purely optional and
does not change the script's behavior if libcpuinfo is not
installed.
libcpuinfo is a cross-vendor, cross-architecture source for CPU
related information that has the capability to replace libvirt's
dependence on qemu's cpu feature list.
[1] https://gitlab.com/twiederh/libcpuinfo
Signed-off-by: Tim Wiederhake <twiederh@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
On failure to plug the device the cleanup path didn't roll back the FD
passing to qemu thus qemu would hold the FDs indefinitely.
Resolves: https://issues.redhat.com/browse/RHEL-53964
Fixes: b79abf9c3cdab8bcecfa8769629a4cdf4bf0b6c3 (vdpafd)
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
As of libssh commit of libssh-0.11.0~70 [1] the
ssh_channel_get_exit_status() function is deprecated and a new
one is introduced instead: ssh_channel_get_exit_state().
It's not a drop-in replacement, but it's simple enough.
Adapt our libssh handling code to this change.
1: https://git.libssh.org/projects/libssh.git/commit/?id=04d86aeeae73c78af8b3dcdabb2e588cd31a8923
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
This mostly reverts commit 65491a2dfe00bfcf9f09a8d6eab60234b56c8cc4.
There was a bug introduced in glib 2.67.0 which impacted libvirt with
clang causing -Wincompatible-pointer-types-discards-qualifiers warnings.
This was actually fixed quite quickly in 2.67.1 with
https://gitlab.gnome.org/GNOME/glib/-/merge_requests/1719
Our workaround was then broken with glib 2.81.1 due to commit
14b3d5da9019150d821f6178a075d85044b4c255 changing the signature of the
(private) macro we were overriding.
Since odd-number glib releases are development snapshots, and the
original problem was only present in 2.67.0 and no other releases,
just drop the workaround entirely.
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Backport the implementation of 'g_string_replace' until we require at
least glib-2.68
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Invoke virCHProcessStop to kill CH process incase of any failures during
restore operation.
Signed-off-by: Purna Pavan Chandra <paekkaladevi@linux.microsoft.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Cloud-hypervisor now supports restoring with new net fds.
Ref: https://github.com/cloud-hypervisor/cloud-hypervisor/pull/6402
So, pass new tap fds via SCM_RIGHTS to CH's restore api.
Signed-off-by: Purna Pavan Chandra <paekkaladevi@linux.microsoft.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Remove the unwanted utility function and make api calls directly from
virCHMonitorSaveVM fn
Signed-off-by: Purna Pavan Chandra <paekkaladevi@linux.microsoft.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Instead of curl, use low-level socket connections to make restore api
request to CH. This will enable passing new net FDs to CH while
restoring domains with network configuration.
Signed-off-by: Purna Pavan Chandra <paekkaladevi@linux.microsoft.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
chSocketRecv fn can be used by operations such as restore, which cannot
have a specific poll timeout. The runtime of these operations at server
side (vmm) cannot be determined or capped as it depends on the guest
configuration. Hence, add a new parameter 'use_timeout' which when set
will pass -1 as timeout to poll, otherwise the default PKT_TIMEOUT_MS is
used.
Signed-off-by: Purna Pavan Chandra <paekkaladevi@linux.microsoft.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Move monitor socket connection, response handling and closing FDs code into
new functions in preparation for adding restore support for net devices.
Signed-off-by: Purna Pavan Chandra <paekkaladevi@linux.microsoft.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Pass "net_<index>" as net id to CH. This is to have better control over
the network configs. This id can be further used in performing
operations like restore etc.
Signed-off-by: Purna Pavan Chandra <paekkaladevi@linux.microsoft.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
The response message from CH for vm.add-net api will be more helpful in
debugging. Hence, log the message instead of just response code.
Signed-off-by: Purna Pavan Chandra <paekkaladevi@linux.microsoft.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Add dma-translation attribute to qemu command line if specified in
domain conf.
Signed-off-by: Sandesh Patel <sandesh.patel@nutanix.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Add dma_translation attribute to iommu to enable/disable dma traslation
for intel-iommu
Signed-off-by: Sandesh Patel <sandesh.patel@nutanix.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Depending on timing between QEMU and libvirt an attempt to resume failed
post-copy migration could immediately report a failure in post-copy
phase again even though the migration actually resumed and is
progressing just fine.
This is caused by QEMU reporting the original migration state (i.e.,
postcopy-paused) until migration is successfully resumed and QEMU
switches to postcopy-active. QEMU 9.1 introduced a new
postcopy-recover-setup migration state which is entered immediately
after requesting migration to be resumed and we can reliably wait for
the migration to either continue or fail without being confused by the
old state.
https://issues.redhat.com/browse/RHEL-22166
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
This patch adds support for recognizing the new migration state reported
by QEMU when post-copy recovery is requested. It is not actually used
for anything yet.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
The original condition caused (after adding modify option)
possibly access to not allocated memory. For consistency added
new check for multiple same records.
Resolves: https://gitlab.com/libvirt/libvirt/-/issues/654
Signed-off-by: Adam Julis <ajulis@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
The "modify" command allowed to replace an existing record, now
checks for the NULL string in the new value and throw error if
found.
Resolves: https://gitlab.com/libvirt/libvirt/-/issues/655
Signed-off-by: Adam Julis <ajulis@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
The QEMU package in Debian has recently moved the
qemu-bridge-helper binary under /usr/libexec/qemu. Update the
AppArmor profile accordingly.
https://bugs.debian.org/1077915
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Jim Fehlig <jfehlig@suse.com>
The s390(x) machines never supported ACPI. That didn't stop users
enabling ACPI in their config. As of libvirt-9.2 (98c4e3d073) with new
enough qemu we reject configs which require ACPI, but qemu can't satisfy
it.
This breaks migration of existing VMs with the old wrong configs to new
libvirt installations.
To address this introduce a post-parse fixup removing the ACPI flag
specifically for s390 machines which do enable it in the definition.
The advantage of doing it in post-parse, rather than simply relaxing the
ABI stability check to allow users providing an fixed XML when migrating
(allowing change of the ACPI flag for s390 in ABI stability check, as it
doesn't impact ABI), is that only the destination installation needs to
be patched in order to preserve migration.
To mitigate the disadvantage of simply stripping it from all s390(x)
configs the hack is not applied when defining or starting a new domain
from the XML, to preserve the error about unsupported configuration.
Resolves: https://issues.redhat.com/browse/RHEL-49516
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Boris Fiuczynski <fiuczy@linux.ibm.com>
This reverts commit cf934c87cca32149675020ea595712aad25978e6.
The matching logic is flawed and it would complicate support of
this command.
Signed-off-by: Adam Julis <ajulis@redhat.com>
Reviewed-by: Martin Kletzander <mkletzan@redhat.com>
The whole point of pstore device is that the guest writes crash
dumps into it. But the way SELinux label is set on the
corresponding file warrants RO access only. This is due to a
copy-paste from code around: kernel/initrd/DTB/SLIC - these are
RO indeed, but pstore MUST be writable too. In a sense it's
closer to NVRAM/disks - hence set imagelabel on it.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Andrea Bolognani <abologna@redhat.com>
So far we are relying on QEMU or sysadmin to create the file for
pstore. This is suboptimal as in the case of the former we can
not set proper seclabels (there's nothing to set seclabels on
until QEMU is started).
Therefore, make sure the file is created before launching QEMU
and that it has the correct size.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Andrea Bolognani <abologna@redhat.com>
Introduced only a couple of commits ago (in
v10.5.0-84-g90e50e67c6) the pstore device acts as a nonvolatile
storage, where guest kernel can store information about crashes.
This device, however, expects a file in the host from which the
crash data is read. So far, we expected users to provide a path,
but we can autogenerate one if missing. Just put it next to
per-domain's NVRAM stores.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Andrea Bolognani <abologna@redhat.com>
As can be seen in earlier commits, there can be two OEM strings
with the same index. But since our parser
(virSysinfoParseOEMStrings()) doesn't expect that, it increments
index in each run and thus skips over these strings.
Fortunately, we have the right index at hand - we're just
skipping over it in a loop. Just reconstruct the index back
inside the loop.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
On some systems, there are two or even more 'OEM Strings'
sections in DMI table. Here's an example of dmidecode output on
such system:
# dmidecode -q -t 11
OEM Strings
String 1: Default string
OEM Strings
String 1: ThunderX2 System
String 2: cavium.com
String 3: Comanche
Now, this poses a problem, because when one tries to obtain
individual strings, they get:
# dmidecode -q --oem-string 1
Default string
ThunderX2 System
# dmidecode -q --oem-string 2
No OEM string number 2
cavium.com
NB, the "No OEM string number 2" is printed onto stderr and
everything else onto stdout. Oh, and trying to get OEM strings
from just one section doesn't fly:
# dmidecode -q -H 0x1d --oem-string 2
Options --string, --type, --handle and --dump-bin are mutually exclusive
This means two things:
1) we have no way of distinguishing OEM strings at the same index
but in different sections,
2) because of how virSysinfoDMIDecodeOEMString() is written, we
fail in querying OEM string that exists in one section but not
in the others (for instance string #2 from example above).
While there's not much we can do about 1), there is something
that can be done about 2) - refine the error condition and make
the function return an error iff there's nothing on stdout and
there's something on stderr.
Resolves: https://issues.redhat.com/browse/RHEL-45952
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
If dry run of a command was requested (virCommandSetDryRun())
then a specified callback is called instead of running actual
command. This is meant to be used in tests. To mimic running the
command as closely as possible the callback can also set exit
status of the command it's implementing. To save some lines
though, the exit status is initialized to 0 so that callback has
to set it only on failures. Now, 0 is not exactly portable value
- that's why stdlib.h has EXIT_SUCCESS (and EXIT_FAILURE) values.
Initialize the exit status (held in dryRunStatus) to EXIT_SUCCESS
then.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
The acpi-erst backend for pstore device exposes a path in the
host accessible to the guest and as such we must set seclabels on
it to grant QEMU RW access.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Kristina Hanicova <khanicov@redhat.com>
Nothing special going on here.
Resolves: https://issues.redhat.com/browse/RHEL-24746
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Kristina Hanicova <khanicov@redhat.com>
The aim of pstore device is to provide a bit of NVRAM storage for
guest kernel to record oops/panic logs just before the it
crashes. Typical usage includes usage in combination with a
watchdog so that the logs can be inspected after the watchdog
rebooted the machine. While Linux kernel (and possibly Windows
too) support many backends, in QEMU there's just 'acpi-erst'
device so stick with that for now. The device must be attached to
a PCI bus and needs two additional values (well, corresponding
memory-backend-file needs them): size and path. Despite using
memory-backend-file this does NOT add any additional RAM to the
guest and thus I've decided to expose it as another device type
instead of memory model.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Kristina Hanicova <khanicov@redhat.com>
The new option style renamed one of the cache modes.
https://issues.redhat.com/browse/RHEL-50329
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
In cases when a QEMU process takes longer than the time sigterm and
sigkill are issued to kill the process do not simply fail and leave the
VM in state VIR_DOMAIN_SHUTDOWN until the daemon stops. Instead set up
an fd on /proc/$pid and get notified when the QEMU process finally has
terminated to cleanup the VM state.
Resolves: https://issues.redhat.com/browse/RHEL-28819
Signed-off-by: Boris Fiuczynski <fiuczy@linux.ibm.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
If there are absent values in an already existing element
specifying rom settings, we simply use the old ones. This
behaviour is not desired, as users might think that deleting the
element from XML would delete the setting (because the hotplug
succeeds) - which does not happen. Because of that, we should not
accept an interface without elements that cannot be changed.
Therefore, we should not allow absent values for already existing
rom setting during hotplug.
Resolves: https://issues.redhat.com/browse/RHEL-7109
Signed-off-by: Kristina Hanicova <khanicov@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
New element 'openfiles' had confusing name. Since the patch with
this new element wasn't propagate yet, old name ('rlimit_nofile')
was changed.
...
<binary>
<openfiles max='122333'/>
</binary>
...
Signed-off-by: Adam Julis <ajulis@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Since libvirt commit 3ef9b51b10e52886e8fe8d75e36d0714957616b7,
the pflash storage for the os loader file follows its read-only flag,
and qemu tries to open the file for writing if set so.
This patches virt-aa-helper to generate the VM's AppArmor rules
that allow this, using the same domain definition flag and default.
Signed-off-by: Miroslav Los <mirlos@cisco.com>
Tested-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>
Reviewed-by: Andrea Bolognani <abologna@redhat.com>
By definition. Accordingly, filter them out when looking for
a read/write image.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
If the configuration explicitly requests a specific type of
firmware image, be it pflash or ROM, we should ignore all images
that are not of that type.
If no specific type has been requested, of course, any type is
considered a match and the selection will be based upon the
other attributes.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Add an element to configure the rlimit nofile size:
...
<binary>
<rlimit_nofile size='122333'/>
</binary>
...
Non-positive values are forbidden in 'domaincommon.rng'. Added separate
test file, created by modifying the 'vhost-user-fs-fd-memory.xml'.
Signed-off-by: Adam Julis <ajulis@redhat.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
