There are two places where the @model member of
_virDomainIOMMUDef struct is typecasted to virDomainIOMMUModel
which is completely unnecessary because the struct already
defines the member of that type.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
No sane firmware build will fail this check, but just to be on
the safe side let's check anyway.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Currently, a firmware configuration such as
<os firmware='efi'>
<firmware>
<feature enabled='yes' name='enrolled-keys'/>
</firmware>
</os>
will correctly pick a firmware that implements the Secure Boot
feature and initialize the NVRAM file so that it contains the
keys necessary to enforce the signing requirements. However, the
lack of a
<loader secure='yes'/>
element makes it possible for pflash writes to happen outside
of SMM mode. This means that the authenticated UEFI variables
where the keys are stored could potentially be overwritten by
malicious code running in the guest, thus making it possible to
circumvent Secure Boot.
To prevent that from happening, automatically turn on the
loader.secure feature whenever a firmware that implements Secure
Boot is chosen by the firmware autoselection logic. This is
identical to the way we already automatically enable SMM in such
a scenario.
Note that, while this is technically a guest-visible change, it
will not affect migration of existings VMs and will not prevent
legitimate guest code from running.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
When resuming post-copy migration users may want to limit the bandwidth
used by the migration and use a value that is different from the one
specified when the migration was originally started.
Resolves: https://gitlab.com/libvirt/libvirt/-/issues/333
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
So the we can apply selected migration parameters even when resuming
post-copy migration.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
We will need to annotate individual parameters a bit more than just
noting their type. Let's introduce qemuMigrationParamInfo replacing
simple qemuMigrationParamTypes with an array of structs.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
The flags will later be used to determine which parameters should
actually be applied.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
My original commit v8.4.0-288-gf01fc4d119 accidentally forgot to fix
both instances of the same problem. While it fixed the destination side
of migration, the source one remained broken.
However, that commit was also wrong in saying the issue could have
caused unlimited memory locking to be allowed for QEMU when RDMA
migration was used. It could not, because the code would refuse to even
think about starting RDMA migration if hard_limit was not set. But
avoiding the "mem.hard_limit > 0" check is useful anyway.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Introduced in v8.4.0-rc1~183 but the first real problem
introduced in v8.4.0-rc1~170, there's a
qemuBuildInterfaceConnect() call inside of
qemuDomainAttachNetDevice(). If the former fails, then the
function is immediately returned from instead of jumping onto the
cleanup label. This is crucial, because at this point the domain
definition contains 'borrowed' net definition, which is then
freed, since an error was met. The domain definition is then left
with a dangling pointer which leads to all sorts of different
crashes.
Fixes: 29d022b1eb
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=2102009
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
Our documentation says RDMA migration requires hard_limit to be set so
that we know how big memory locking limit should be set for the domain
during migration. But since commit v1.2.13-71-gcf521fc8ba (which changed
the default hard_limit value from 0 to
VIR_DOMAIN_MEMORY_PARAM_UNLIMITED) we were actually setting memlock
limit to unlimited if hard_limit was not set.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
For RDMA migration we update memory locking limit, but never set it back
once migration finishes (on the destination host) or aborts (on the
source host).
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
This helper will not try to set the limit if it is already big enough,
which may be useful when libvirt daemon is running in a containerized
environment and is not allowed to change memory locking limit.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
qemuDomainAdjustMaxMemLock combined computing the desired limit with
applying it. This patch separates the code to apply a memory locking
limit to a new qemuDomainSetMaxMemLock helper for better reusability.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Convert all the cases where we can unconditionally free
the virURI at the end of scope.
In libxlDomainMigrationDstPrepare, uri is only filled
if uri_in was present, so moving the virURIFree out of
the condition is safe.
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Replace tpm->type and tpm->model qemuCaps validation with the
similar logic in domcaps.
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Cole Robinson <crobinso@redhat.com>
The qemu `tpm-tis` device is an ISA device, so only really applicable
to x86 archs. For all non-x86 archs we should use `tpm-tis-device`
This fixes tpm-tis usage on armv7l and riscv
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Cole Robinson <crobinso@redhat.com>
Checking against qemu capabilities should be enough here
Resolves: https://gitlab.com/libvirt/libvirt/-/issues/329
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Cole Robinson <crobinso@redhat.com>
We explicitly check whether the value is YES or NO, which makes
it unnecessary to make sure it's not ABSENT beforehand.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
This patch introduces the logic to format and parse remote NVRAM.
Update NVRAM element schema, and docs for supporting network backed
NVRAM. NVRAM backed over network would give the flexibility to start
the VM on any host without having to worry about where to get the latest
nvram image.
<nvram type='network'>
<source protocol='iscsi' name='iqn.2013-07.com.example:iscsi-nopool/0'>
<host name='example.com' port='6000'/>
</source>
</nvram>
or
<nvram type='file'>
<source file='/var/lib/libvirt/nvram/guest_VARS.fd'/>
</nvram>
In the qemu driver we will support the new definition only with qemu's
supporting -blockdev.
Signed-off-by: Prerna Saxena <prerna.saxena@nutanix.com>
Signed-off-by: Florian Schmidt <flosch@nutanix.com>
Signed-off-by: Rohit Kumar <rohit.kumar3@nutanix.com>
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Tested-by: Rohit Kumar <rohit.kumar3@nutanix.com>
Prepare for network backed nvram by refusing the reset of nvram on boot
and don't check whether it exists. We will not support filling it from a
template.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Tested-by: Rohit Kumar <rohit.kumar3@nutanix.com>
Setup all fields for use with -blockdev.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Tested-by: Rohit Kumar <rohit.kumar3@nutanix.com>
We don't really use it besides when starting up the VM so when
reconnecting this step is totally pointless.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Tested-by: Rohit Kumar <rohit.kumar3@nutanix.com>
Use the designated helpers for virStorageSource instead using the
file-based ones with a check.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Tested-by: Rohit Kumar <rohit.kumar3@nutanix.com>
Since we now have a full virStorageSource for storing the nvram path we
don't need the extra dance of transferring the data into the 'pflash1'
variable which was an intermediary solution to use -blockdev.
For now we keep it functionally identical to the previous impl.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Tested-by: Rohit Kumar <rohit.kumar3@nutanix.com>
Currently, libvirt allows only local filepaths to specify the location
of the 'nvram' image. Changing it to virStorageSource type will allow
supporting remote storage for nvram.
Signed-off-by: Prerna Saxena <prerna.saxena@nutanix.com>
Signed-off-by: Florian Schmidt <flosch@nutanix.com>
Signed-off-by: Rohit Kumar <rohit.kumar3@nutanix.com>
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Tested-by: Rohit Kumar <rohit.kumar3@nutanix.com>
Extract the internals of qemuDomainPrepareStorageSourceBlockdev into
qemuDomainPrepareStorageSourceBlockdevNodename so that we can reuse it
when instantiating the virStorageSource for pflash backing.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Tested-by: Rohit Kumar <rohit.kumar3@nutanix.com>
This is a partial revert of 87a43a907f
The change to use g_clear_pointer() in more places was accidentally
applied to cases involving vir_g_source_unref().
In some cases, the ordering of g_source_destroy() and
vir_g_source_unref() was reversed, which resulted in the source being
marked as destroyed, after it is already unreferenced. This
use-after-free case might work in many cases, but with versions of
glib older than 2.64.0 it may defer unref to run within the main
thread to avoid a race condition, which creates a large distance
between the g_source_unref() and g_source_destroy().
In some cases, the call to vir_g_source_unref() was replaced with a
second call to g_source_destroy(), leading to a memory leak or worse.
In our experience, the symptoms were that use of libvirt-python became
slower over time, with OpenStack nova-compute initially taking around
one second to periodically query the host PCI devices, and within an
hour it was taking over a minute to complete the same operation, until
it is was eventually running this query back-to-back, resulting in the
nova-compute process consuming 100% of one CPU thread, losing its
RabbitMQ connection frequently, and showing up as down to the control
plane.
Signed-off-by: Mark Mielke <mark.mielke@gmail.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Signed-off-by: Ján Tomko <jtomko@redhat.com>
When creating a TAP interface we can end up with multiple FDs,
each representing one queue. However, these FDs must be
relabelled as they are then passed to QEMU. In case of
qemuBuildInterfaceConnect() we allocate the array for the FDs and
then let function corresponding to the <interface/> type to fill
the array with FDs. When any of the functions meets an error,
it's also responsible for closing previously opened FDs. However,
the functions take a shortcut: iterate through each member of the
array and close it (if it's non-negative). This assumes that the
array is initialized to negative values, which use to be the case
before rewrite in v8.4.0-rc1~170 but after it it's no longer the
case. Subsequently, "random" FDs are closed (okay, not that
random since the array is allocated via g_new0(), but hey - FD 0
is still valid FD and might be valuable, actually).
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=2075383#c18
Fixes: 7a38d3946b
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Since the main-loop and iothread classes are derived from the
same class (EventLoopBaseClass) we don't need new capability and
can use QEMU_CAPS_IOTHREAD_THREAD_POOL_MAX directly to check
whether QEMU's capable of setting defaultiothread pool size.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Introduced in previous commit, QEMU driver needs to be taught how
to set VIR_DOMAIN_IOTHREAD_THREAD_POOL_MIN and
VIR_DOMAIN_IOTHREAD_THREAD_POOL_MAX parameters on given IOThread.
Fortunately, this is fairly trivial to do and since these two
parameters are exposed in domain XML too the update of inactive
XML can be wired up too.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Now that we have a capability that reflects whether QEMU is
capable of setting iothread pool size, let's introduce a
validator check to make sure users are not trying to use this
feature with QEMU that doesn't support it.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
This capability reflects whether QEMU allows setting
thread-pool-min and thread-pool-max attributes on iothread
object. Since both attributes were introduced in the same commit
(v7.0.0-878-g71ad4713cc) and can't exist independently of each
other we can stick with one capability covering both of them.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
They were constructed from two separate strings using "%s: %s", which
is ugly and does not work well with translations.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Martin Kletzander <mkletzan@redhat.com>
When a domain has a guest agent channel enabled and the agent is running
in the guest, we will get VSERPORT_CHANGE event on a destination host as
soon as we start vCPUs there. This is not an issue for normal migration,
but post-copy migration will remain running after we started vCPUs on
the destination. If it runs for more than 30s, the VSERPORT_CHANGE event
handler will fail to get a job and log the following error message:
Timed out during operation: cannot acquire state change lock (held
by monitor=remoteDispatchDomainMigrateFinish3Params)
and of course we will think the guest agent is not connected and thus
all APIs talking to it will fail. Until the agent or libvirt daemon is
restarted.
Luckily we only need to update the channel state (to mark it as
connected) and connect to the agent neither of which conflicts with
migration. Thus we can safely enable processing this event during
migration.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
This is a special job for operations that need to modify domain state
during an active migration. The modification must not affect any state
that could conflict with the migration code. This is useful mainly for
event handlers that need to be processed during migration and which
could otherwise time out on acquiring a normal MODIFY job.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Since all parts of post-copy recovery have been implemented now, it's
time to enable the corresponding flag.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Every single call to qemuMigrationJobContinue needs to register a
cleanup callback in case the migrating domain dies between phases or
when migration is paused due to a failure in postcopy mode.
Let's integrate registering the callback in qemuMigrationJobContinue to
make sure the current thread does not release a migration job without
setting a cleanup callback.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
The callback will properly cleanup non-p2p migration job in case the
migrating domain dies between Begin and Perform while the client which
controls the migration is not cooperating (normally the API for the next
migration phase would handle this).
The same situation can happen even after Prepare and Perform phases, but
they both already register a suitable callback, so no fix is needed
there.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Normally the structure is created once the source reports completed
migration, but with post-copy migration we can get here even after
libvirt daemon was restarted. It doesn't make sense to preserve the
structure in our status XML as we're going to rewrite almost all of it
while refreshing the stats anyway. So we just create the structure here
if it doesn't exist to make sure we can properly report statistics of a
completed migration.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Everything was already done in the normal Finish phase and vCPUs are
running. We just need to wait for all remaining data to be transferred.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
The QEMU process is already running, all we need to do is to call
migrate-recover QMP command. Except for some checks and cookie handling,
of course.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Non-postcopy case talks to QEMU monitor and thus needs to create a
nested job. Since qemuMigrationAnyConnectionClosed is called in case
there's no thread processing a migration API, we need to make the
current thread a temporary owner of the migration job to avoid "This
thread doesn't seem to be the async job owner: 0". This is done by
starting a migration phase.
While no monitor interaction happens in postcopy case and just setting
the phase (to indicate a broken postcopy migration) would be enough,
being consistent and setting the owner does not hurt anything.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
To prepare the code for handling incoming migration too.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
The function is now called qemuMigrationAnyConnectionClosed to make it
clear it is supposed to handle broken connection during migration. It
will soon be used on both sides of migration so the "Src" part was changed
to "Any" to avoid renaming the function twice in a row.
The original *Cleanup name could easily be confused with cleanup
callbacks called when a domain is destroyed.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
This command tells QEMU to start listening for an incoming post-copy
recovery connection. Just like migrate-incoming is used for starting
fresh migration on the destination host.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Offline migration jumps over a big part of qemuMigrationDstPrepareFresh.
Let's move that part into a new qemuMigrationDstPrepareActive function
to make the code easier to follow.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Moves most of the code from qemuMigrationDstPrepareAny to a new
qemuMigrationDstPrepareFresh so that qemuMigrationDstPrepareAny can be
shared with post-copy resume.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
It just calls migrate QMP command with resume=true without having to
worry about migration capabilities or parameters, storage migration,
etc. since everything has already been done in the normal Perform phase.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
qemuMigrationSrcRun does a lot of thing before and after telling QEMU to
start the migration. Let's make the core reusable by moving it to a new
qemuMigrationSrcStart function.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
To make the code flow a bit more sensible.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Mostly we just need to check whether the domain is in a failed post-copy
migration that can be resumed.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
This phase marks a migration protocol as broken in a post-copy phase.
Libvirt is no longer actively watching the migration in this phase as
the migration API that started the migration failed.
This may either happen when post-copy migration really fails (QEMU
enters postcopy-paused migration state) or when the migration still
progresses between both QEMU processes, but libvirt lost control of it
because the connection between libvirt daemons (in p2p migration) or a
daemon and client (non-p2p migration) was closed. For example, when one
of the daemons was restarted.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Both qemuMigrationJobSetPhase and qemuMigrationJobStartPhase were doing
the same thing, which made little sense. Let's follow the difference
between qemuDomainObjSetJobPhase and qemuDomainObjStartJobPhase and
change job owner only in qemuMigrationJobStartPhase.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
We will want to update migration phase without affecting job ownership.
Either in the thread that already owns the job or from an event handler
which only changes the phase (of a job no-one owns) without assuming it.
Let's move the ownership change to a new qemuDomainObjStartJobPhase
helper and let qemuDomainObjSetJobPhase set the phase without touching
ownership.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
The check can reveal a serious bug in our migration code and we should
not silently ignore it.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Into a new qemuMigrationCheckPhase helper, which can be reused in other
places.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
When recovering from a failed post-copy migration, we need to go through
all migration phases again, but don't need to repeat all the steps in
each phase. Let's create a new set of migration phases dedicated to
post-copy recovery so that we can easily distinguish between normal and
recovery code.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Turn the final part of Begin phase formatting a domain XML for migration
into a reusable helper.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
When libvirt daemon is restarted during an active post-copy migration,
we do not always mark the migration as broken. In this phase libvirt is
not really needed for migration to finish successfully. In fact the
migration could have even finished while libvirt was not running or it
may still be happily running.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
We want to use query-migrate QMP command to check the current migration
state when reconnecting to active domains, but the reply we get to this
command may not contain any statistics at all if called on the
destination host.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
So far migration could only be completed while a migration API was
running and waiting for the migration to finish. In case such API could
not be called (the connection that initiated the migration is broken)
the migration would just be aborted or left in a "don't know what to do"
state. But this will change soon and we will be able to successfully
complete such migration once we get the corresponding event from QEMU.
This is specific to post-copy migration when vCPUs are already running
on the destination and we're only waiting for all memory pages to be
transferred. Such post-copy migration (which no-one is actively
watching) is called unattended migration.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
When reconnecting to an active domain we need to use a different job
structure than the one referenced from the VM object.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Normally migrationPort is released in the Finish phase, but we need to
make sure it is properly released also in case qemuMigrationDstFinish is
not called at all. Currently the only callback which is called in this
situation qemuMigrationDstPrepareCleanup which already releases
migrationPort. This patch adds similar handling to additional callbacks
which will be used in the future.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
By separating it into a dedicated qemuMigrationSrcComplete function
which can be later called in other places.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
The function which started a migration phase should also finish it by
calling qemuMigrationJobFinish/qemuMigrationJobContinue so that the code
is easier to follow.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Refactors qemuMigrationDstFinish by moving some parts to a dedicated
function for easier introduction of postcopy resume code without
duplicating common parts of the Finish phase. The goal is to have the
following call graph:
- qemuMigrationDstFinish
- qemuMigrationDstFinishOffline
- qemuMigrationDstFinishActive
- qemuMigrationDstFinishFresh
- qemuMigrationDstFinishResume
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
To keep all cookie handling (parsing and formatting) in the same
function.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Refactors qemuMigrationDstFinish by moving some parts to a dedicated
function for easier introduction of postcopy resume code without
duplicating common parts of the Finish phase. The goal is to have the
following call graph:
- qemuMigrationDstFinish
- qemuMigrationDstFinishOffline
- qemuMigrationDstFinishActive
- qemuMigrationDstFinishFresh
- qemuMigrationDstFinishResume
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Refactors qemuMigrationDstFinish by moving some parts to a dedicated
function for easier introduction of postcopy resume code without
duplicating common parts of the Finish phase. The goal is to have the
following call graph:
- qemuMigrationDstFinish
- qemuMigrationDstFinishOffline
- qemuMigrationDstFinishActive
- qemuMigrationDstFinishFresh
- qemuMigrationDstFinishResume
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
We want to prevent our error path that can potentially kill the domain
on the destination host from overwriting an error reported earlier, but
we were only doing so in one specific path when starting vCPUs fails.
Let's do it in all paths.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
The comment about QEMU < 0.10.6 has been irrelevant for years.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
By separating it into a dedicated qemuMigrationDstComplete function
which can be later called in other places.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
The final part of Finish phase will be refactored into a dedicated
function and we don't want to generate the cookie there.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Let's call it "error" so that it's clear the label is only used in
failure path.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Most of the code in "endjob" label is executed only on failure. Let's
duplicate the rest so that the label can be used only in error path
making the success path easier to follow and refactor.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Code executed only when dom != NULL can be moved before "endjob" label,
to the only place where dom is set.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
We don't need the object until we get to the "endjob" label.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
When connection breaks during post-copy migration, QEMU enters
'postcopy-paused' state. We need to handle this state and make the
situation visible to upper layers.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Even though a migration is paused, we still want to see the amount of
data transferred so far and that the migration is indeed not progressing
any further.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Migration is a job which takes some time and if it succeeds, there's
nothing to call another migration on. If a migration fails, it might
make sense to rerun it with different arguments, but this would only be
done once the first migration fails rather than while it is still
running.
If this was not enough, the migration job now stays active even if
post-copy migration fails and anyone possibly retrying the migration
would be waiting for the job timeout just to get a suboptimal error
message.
So let's special case getting a migration job when another one is
already active.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Jobs that are supposed to remain active even when libvirt daemon
restarts were reported as started at the time the daemon was restarted.
This is not very helpful, we should restore the original timestamp.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Since we keep the migration job active when post-copy migration fails,
we need to restore it when reconnecting to running domains.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
When migration fails after it already switched to post-copy phase on the
source, but early enough that we haven't called Finish on the
destination yet, we know the vCPUs were not started on the destination
and the source host still has a complete state of the domain. Thus we
can just ignore the fact post-copy phase started and normally abort the
migration and resume vCPUs on the source.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
When post-copy migration fails, we can't just abort the migration and
resume the domain on the source host as it is already running on the
destination host and no host has a complete state of the domain memory.
Instead of the current approach of just marking the domain on both ends
as paused/running with a post-copy failed sub state, we will keep the
migration job active (even though the migration API will return failure)
so that the state is more visible and we can better control what APIs
can be called on the domains and even allow for resuming the migration.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
The code for setting up a previously active backup job in
qemuProcessRecoverJob is generalized into a dedicated function so that
it can be later reused in other places.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
It is used for saving job out of domain object. Just like
virErrorPreserveLast is used for errors. Let's make the naming
consistent as Restore would suggest different semantics.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
The function can be used as a callback for qemuDomainCleanupAdd to
automatically clean up a migration job when a domain is destroyed.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
The function never returns anything but zero.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
The events would normally be triggered only if we're changing domain
state. But most of the time the domain is already in the right state and
we're just changing its substate from {PAUSED,RUNNING}_POSTCOPY to
*_POSTCOPY_FAILED. Let's emit lifecycle events explicitly when post-copy
migration fails to make the failure visible without polling.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
There's no need to artificially pause a domain when post-copy fails
from our point of view unless QEMU connection is broken too as migration
may still be progressing well.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
This new "post-copy failed" reason for the running state will be used on
the destination host when post-copy migration fails while the domain is
already running there.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
'STREQ' is used to compare the override alias with the device alias.
While the parser ensures that the override alias is non-NULL, the device
alias may be NULL and STREQ doesn't handle that.
Fixes: 38ab5c9ead
Resolves: https://gitlab.com/libvirt/libvirt/-/issues/321
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
We need to use the 'name' variable and just overwrite it with the FD
number when FDs are passed on the monitor. Otherwise we will read NULL
path if the FD is accessed before being passed on the monitor. The idea
of this helper is to simplify the monitor code so it would be
counterproductive to have other behaviour.
Fixes the following symptom:
$ virsh attach-interface cd network default --model virtio
error: Failed to attach interface
error: internal error: unable to execute QEMU command 'netdev_add': File descriptor named '(null)' has not been found
Fixes: bca9047906
Resolves: https://gitlab.com/libvirt/libvirt/-/issues/318
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=2092856
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Obtaining a screenshot via virDomainScreenshot() works like this:
1) we create a temp file, label it, then
2) tell QEMU to store the screenshot into it, and
3) finally, open the file for transfer via virStream
Since the file is just temporary and even explicitly unlinked at
the end, no seclabel restoration is done. This makes perfect
sense for security models which attach a label to file itself
(DAC, SELinux) because the label is gone with the file. However,
for models where a list of files and allowed actions is kept on a
side (AppArmor) this approach means we just append files into the
profile and never remove them. In turn, the file grows and policy
update takes longer with each entry.
Restore the seclabel for AppArmor's sake.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
The virStorageSourceGetActualType() function returns either
virStorageSource->type (which is of type virStorageType), or
virStorageSourcePoolDef->type, which really stores a value of the
same enum. Thus, the latter struct can be changed so that the
virStorageSourceGetActualType() function can return correct type
instead of generic int.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Boris Fiuczynski <fiuczy@linux.ibm.com>
There are three places (two in domain_conf.c and one in
qemu_migration.c) where a virStorageSource->type is typecasted to
virStorageType (for the purpose of catching missing enum member
in a switch() statement at compile time). This is needless,
because as of v8.2.0-rc1~120 the struct member is of proper type.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Boris Fiuczynski <fiuczy@linux.ibm.com>
There are two functions declared in qemu_capspriv.h:
1) virQEMUCapsInitHostCPUModel() which is not used anywhere but
qemu_capabilities.c,
2) virQEMUCapsSetSEVCapabilities() which is my personal favorite
but despite that it's never implemented nor called.
Drop them.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Boris Fiuczynski <fiuczy@linux.ibm.com>
The virDomainObj struct has @pid member where the domain's
hypervisor PID is stored (e.g. QEMU/bhyve/libvirt_lxc/... PID).
However, we are not consistent when it comes to shutoff state.
Initially, because virDomainObjNew() uses g_new0() the @pid is
initialized to 0. But when domain is shut off, some functions set
it to -1 (virBhyveProcessStop, virCHProcessStop, qemuProcessStop,
..).
In other places, the @pid is tested to be 0, on some other places
it's tested for being negative and in the rest for being
positive.
To solve this inconsistency we can stick with either value, -1 or
0. I've chosen the latter as it's safer IMO. For instance if by
mistake we'd kill(vm->pid, SIGTERM) we would kill ourselves
instead of init's process group.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Jonathon Jongsma <jjongsma@redhat.com>
When cleaning up after stopped domain, one of the things we do is
attempt to clear QoS settings on OVS type interfaces. Well, this
is needless because they were removed just a couple of lines
above. As a result, the attempt fails and a warning is printed
into logs, polluting them needlessly.
Closes: https://gitlab.com/libvirt/libvirt/-/issues/313
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Detected by gcc 11 -Wformat-overflow:
../../src/qemu/qemu_driver.c: In function ‘qemuDomainBlockJobAbort’:
../../src/util/virerror.h:176:5: warning: ‘%s’ directive argument is null [-Wformat-overflow=]
176 | virReportErrorHelper(VIR_FROM_THIS, code, __FILE__, \
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
177 | __FUNCTION__, __LINE__, __VA_ARGS__)
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../../src/qemu/qemu_driver.c:14475:17: note: in expansion of macro ‘virReportError’
14475 | virReportError(VIR_ERR_OPERATION_FAILED,
| ^~~~~~~~~~~~~~
../../src/qemu/qemu_driver.c:14476:73: note: format string is defined here
14476 | _("block job '%s' failed while pivoting: %s"),
| ^~
Signed-off-by: Scott Davis <scott.davis@starlab.io>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
It always points to QEMU driver, which is quite redundant as all
callbacks also get a pointer to a vm object. Let's get the driver
pointer from there instead.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
All callers (QMP event handlers) always pass non-NULL vm pointer. Let's
make the parameter mandatory.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Allocating and filling qemuProcessEvent structure is a repeated pattern
before all calls to qemuProcessEventSubmit. We can move the allocation
inside this function and let callers pass all arguments directly.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
In qemu_extdevice.c lives code that handles helper daemons that
are required for some types of devices (e.g. virtiofsd,
vhost-user-gpu, swtpm, etc.). These devices have their own
handling code in separate files, with only a very basic functions
exposed (e.g. for starting/stopping helper process, placing it
into given CGroup, etc.). And these functions all work over a
single instance of device (virDomainVideoDef *, virDomainFSDef *,
etc.), except for TPM handling code which takes virDomainDef *
and iterates over it inside its module.
Remove this oddness and make qemuExtTPM*() functions look closer
to the rest of the code.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
We have virDomainUpdateDeviceFlags() API that allows changing of
some attributes of a device whilst domain is still running (e.g.
setting different QoS, link state change on vNICs). But only very
limited set of attributes can be changed and we have to check
whether user isn't trying to sneak in a change that's not
allowed. Well, in case of a virtio vNIC we forgot to check for
@rss and @rss_hash_report attributes of <driver/>.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=2082540
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Laine Stump <laine@redhat.com>
Fix identation of virQEMUCapsUpdateHostCPUModel() params.
Reviewed-by: Martin Kletzander <mkletzan@redhat.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
My recent commit v8.3.0-201-gc500955e95 tried to fix a regression which
would cause the function to return success even if virCloseCallbacksSet
failed. But due to a strange code flow in the function introduced an
opposite regression. The function would return NULL on success when
called without VIR_MIGRATE_CHANGE_PROTECTION flag.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Refactor ccw data structure virDomainDeviceCCWAddress into util virccw.h
and rename it as virCCWDeviceAddress.
Signed-off-by: Boris Fiuczynski <fiuczy@linux.ibm.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Commit v8.3.0-152-g49ef0f95c6 removed explicit VIR_FREE from
qemuMigrationBegin, effectively reverting v1.2.14-57-g77ddd0bba2
The xml variable was used to hold the return value and thus had to be
unset when an error happened after xml was already non-NULL. Such code
may be quite confusing though and we usually avoid it by not storing
anything to a return variable until everything succeeded.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Like a Spice port, a dbus serial must specify an associated channel name.
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
By default, libvirt will start a private bus and tell QEMU to connect to
it. Instead, a D-Bus "address" to connect to can be specified, or the
p2p mode enabled.
D-Bus display works best with GL & a rendernode, which can be specified
with <gl> child element.
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Start the daemon if necessary (it is already stopped in qemuProcessStop)
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Remove the argument from the function prototypes and the callback
handler.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Access the 'driver' struct from the private data rather than the passed
opaque pointer in preparation to remove the opaque pointer.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Access the 'driver' struct from the private data rather than the passed
opaque pointer in preparation to remove the opaque pointer.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
When dealing with fdsets only we don't need to pass the FD first as we
now generate fdset name directly. Also there are no more caveats in
passing multiple FDs.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Now that the 'direct' mode was separated and thus we don't have any
possible error case we can stop returning any values and simplify
callers.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
