Each time we need to check whether a given migration capability is
supported by QEMU, we call query-migrate-capabilities QMP command and
lookup the capability in the returned list. Asking for the list of
supported capabilities once when we connect to QEMU and storing the
result in a bitmap is much better and we don't need to enter a monitor
just to check whether a migration capability is supported.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: John Ferlan <jferlan@redhat.com>
The new function is called qemuProcessInitMonitor and it will enter/exit
the monitor so that the caller doesn't have to deal with this.
The goal of this patch is to simplify the code in qemuConnectMonitor
which would otherwise be a bit hairy after the following patch.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: John Ferlan <jferlan@redhat.com>
Since the encryption information can also be disk source specific
move it from qemuDomainDiskPrivate to qemuDomainStorageSourcePrivate
Since the last allocated element from qemuDomainDiskPrivate is
removed, that means we no longer need qemuDomainDiskPrivateDispose.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Since the secret information is really virStorageSource specific
piece of data, let's manage the privateData from there instead of
at the Disk level.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Add the object definition and helpers to store security-related private
data for virStorageSources.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
When commit id 'da86c6c22' added support for diskPriv->encinfo in
qemuDomainSecretDiskPrepare a change to qemuDomainSecretDiskDestroy
to was missed. Although qemuDomainDiskPrivateDispose probably would
do the trick.
Signed-off-by: John Ferlan <jferlan@redhat.com>
https://bugzilla.redhat.com/show_bug.cgi?id=1495511
When creating new /dev for domain ran in namespace we try to
preserve all sub-mounts of /dev. Well, not quite all. For
instance if /dev/foo/bar and /dev/foo are both mount points, only
/dev/foo needs preserving. /dev/foo/bar is preserved with it too.
Now, to identify such cases like this one STRPREFIX() is used.
That is not good enough. While it works for [/dev/foo/bar;
/dev/foo] case, it fails for [/dev/prefix; /dev/prefix2] where
the strings share the same prefix but are in fact two different
paths. The solution is to use STRSKIP().
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
Let's move all the virAsprintf()-s into separate functions for
better structure of the code. Later, when somebody wants to
generate a device alias, all they need is to expose the function.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
We have a special function for assigning aliases to RNG devices.
Use that instead of plain virAsprintf().
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Back in the times of using 'pci_del', unplugging a device without
a PCI address was not wired up.
After completely removing support for qemu without QEMU_CAPS_DEVICE,
aliases are used to uniquely identify devices in all cases.
Remove the pointless validation of data that was already present
in the domain definition.
There are two more cases where we set an S390/CCW/PCI address
type based on the machine type.
Reuse qemuDomainEnsureVirtioAddress to reduce repetition.
Split out the common code responsible for reserving/assigning
PCI/CCW addresses for virtio disks into a helper function
for reuse by other virtio devices.
We pass the source.file to qemuCheckCCWS390AddressSupport for
the purpose of reporting an error message without actually checking
that the rng device is of type VIR_DOMAIN_RNG_BACKEND_RANDOM.
Change it to a hardcoded "rng" string, which also avoids
referring to the device by a host-side attribute.
There is one limitation for using this API, when the guest is started
with all actions set to "destroy" we put "-no-reboot" on the QEMU
command line. That cannot be changed while QEMU is running and
the QEMU process is always terminated no matter what is configured
for any action.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1460677
Reviewed-by: John Ferlan <jferlan@redhat.com>
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
We need to send allowReboot in the migration cookie to ensure the same
behavior of the virDomainSetLifecycleAction() API on the destination.
Consider this scenario:
1. On the source the domain is started with:
<on_poweroff>destroy</on_poweroff>
<on_reboot>restart</on_reboot>
<on_crash>destroy</on_crash>
2. User calls an API to set "destroy" for <on_reboot>:
<on_poweroff>destroy</on_poweroff>
<on_reboot>destroy</on_reboot>
<on_crash>destroy</on_crash>
3. The guest is migrated to a different host
4a. Without the allowReboot in the migration cookie the QEMU
process on destination would be started with -no-reboot
which would prevent using the virDomainSetLifecycleAction() API
for the rest of the guest lifetime.
4b. With the allowReboot in the migration cookie the QEMU process
on destination is started without -no-reboot like it was started
on the source host and the virDomainSetLifecycleAction() API
continues to work.
The following patch adds a QEMU implementation of the
virDomainSetLifecycleAction() API and that implementation disallows
using the API if all actions are set to "destroy" because we add
"-no-reboot" on the QEMU command line. Changing the lifecycle action
is in this case pointless because the QEMU process is always terminated.
Reviewed-by: John Ferlan <jferlan@redhat.com>
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
This will be used later on in implementation of new API
virDomainSetLifecycleAction(). In order to use it, we need to store
the value in status XML to not lose the information if libvirtd is
restarted.
If some guest was started by old libvirt where it was not possible
to change the lifecycle action for running guest, we can safely
detect it based on the current actions from the status XML.
Reviewed-by: John Ferlan <jferlan@redhat.com>
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Extract the required data inside a function instead of passing it
all as arguments.
Reviewed-by: John Ferlan <jferlan@redhat.com>
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
There is no need to have two different enums where one has the same
values as the other one with some additions.
Currently for on_poweroff and on_reboot we allow only subset of actions
that are allowed for on_crash. This was covered in parse time using
two different enums. Now to make sure that we don't allow setting
actions that are not supported we need to check it while validating
domain config.
Reviewed-by: John Ferlan <jferlan@redhat.com>
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
So we have a syntax-check rule to catch all tab indents but it naturally
can't catch tab spacing, i.e. as a delimiter. This patch is a result of
running 'vim -en +retab +wq'
(using tabstop=8 softtabstop=4 shiftwidth=4 expandtab) on each file from
a list generated by the following:
find . -regextype gnu-awk \
-regex ".*\.(rng|syms|html|s?[ch]|py|pl|php(\.code)?)(\.in)?" \
| xargs git grep -lP "\t"
Signed-off-by: Erik Skultety <eskultet@redhat.com>
The file object is needed when formatting the command line, but it makes
nesting of the objects less easy for use with blockdev. Separate the
wrapping into the 'file' object into a helper used specifically for disk
sources in the old code path.
Move qemuFreeKeywords into qemu_parse_command.c as
qemuParseKeywordsFree and call it rather than inline code
in multiple places.
Signed-off-by: Kothapally Madhu Pavan <kmp@linux.vnet.ibm.com>
Even though only family and model are used for matching CPUID data with
CPU models from cpu_map.xml, stepping is used by x86DataFilterTSX which
is supposed to disable TSX on CPU models with broken TSX support. Thus
we need to start parsing stepping from QEMU to make sure we don't
disable TSX on CPUs which provide working TSX implementation. See the
following patch for a real world example of such CPU.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: John Ferlan <jferlan@redhat.com>
When libvirt older than 3.9.0 reconnected to a running domain started by
old libvirt it could have messed up the expansion of host-model by
adding features QEMU does not support (such as cmt). Thus whenever we
reconnect to a running domain, revert to an active snapshot, or restore
a saved domain we need to check the guest CPU model and remove the
CPU features unknown to QEMU. We can do this because we know the domain
was successfully started, which means the CPU did not contain the
features when libvirt started the domain.
https://bugzilla.redhat.com/show_bug.cgi?id=1495171
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
When reconnecting to a domain started with a host-model CPU which was
started by old libvirt that did not replace host-model with the real CPU
definition, libvirt replaces the host-model CPU with the CPU from
capabilities (because this is what the old libvirt did when it started
the domain). Without this patch libvirt could use features unknown to
QEMU in the CPU definition which replaced the original host-model CPU.
Such domain would keep running just fine, but any attempt to migrate it
will fail and once the domain is saved or snapshotted, restoring it
would fail too.
In other words whenever we want to use the CPU definition from host
capabilities as a guest CPU definition, we have to filter the unknown
features.
https://bugzilla.redhat.com/show_bug.cgi?id=1495171
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
When migration fails, QEMU may provide a description of the error in
the reply to query-migrate QMP command. We can fetch this error and use
it instead of the generic "unexpectedly failed" message.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Add helpers that will simplify checking if a backing file is valid or
whether it has backing store. The helper virStorageSourceIsBacking
returns true if the given virStorageSource is a valid backing store
member. virStorageSourceHasBacking returns true if the virStorageSource
has a backing store child.
Adding these functions creates a central points for further refactors.
