The current event loop test suite has two threads running
in lockstep. This was just about viable when we have full
control over the internal details of the event loop impl.
When we're using the GLib event loop though there are
things going on that we don't know about, such as use of
eventfd() file descriptors. This will break the assumptions
in the test suite, causing non-deterministic failures.

This change switches the event loop thread to run fully
asynchronously from the test suite cases. This is slightly
weaker validation, but the only way we can get a reliable
test suite.
Reviewed-by: NPavel Hrdina <phrdina@redhat.com>
Signed-off-by: NDaniel P. Berrangé <berrange@redhat.com>

This effectively reverts

  commit 39c77fe5
  Author: Michal Prívozník <mprivozn@redhat.com>
  Date:   Wed Jan 16 11:58:00 2013 +0100

    Introduce event loop to commandtest

because nothing in the current test suite needs this
event loop.
Reviewed-by: NPavel Hrdina <phrdina@redhat.com>
Signed-off-by: NDaniel P. Berrangé <berrange@redhat.com>

The event test directly calls the internal poll event impl
APIs. It does not rely on any specific details of the poll
impl, so it is better to use the public APIs.
Reviewed-by: NPavel Hrdina <phrdina@redhat.com>
Signed-off-by: NDaniel P. Berrangé <berrange@redhat.com>

The flag for the virDomainUndefine API is supported even if we report
that <backup supported='no'/>. Mention it in the docs.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NPavel Hrdina <phrdina@redhat.com>

Use qemuBlockBitmapsHandleBlockcopy to calculate bitmaps to copy over
for a block-copy job.

We copy them when pivoting to the new image as at that point we are
certain that we don't dirty any bitmap unnecessarily.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

Use some of the existing bitmap data to add tests for
qemuBlockBitmapsHandleBlockcopy.

As the output depends on the ordering in the hash table we must also
install the "virdeterministichash" mock preload library.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

Add a function calculating which bitmaps to copy to the mirror during
a block-copy operation.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

Add a case where a bitmap spanning multiple images is missing one of the
intermediate components.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

Add a validator which checks that a bitmap spanning multiple backing
chain members doesn't look broken. The current rules are that no
intermediate birmaps are missing (unfortunately it's hard to know
whether the topmost or bottommost bitmap is missing) and none of the
components is inconsistent.

We can obviously improve it over time.

The validator is also tested against the existing bitmap data we have
for the backup merging test as well as some of the existing broken
bitmap synthetic test cases.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

The flags may control important aspects of the block job which may
influence also the termination of the job. Store the 'flags' for all
the block job types.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

Add a variable which will store the contents of the 'flags' variable as
passed in by the individual block jobs. Since the flags may influence
behaviour of the jobs it's important to preserve them to the
finalization steps.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

Use g_new0 and skip checking of the return value of keyCopy callback
as both are bound to return a valid pointer.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

Tweak the return value expectation comment so that it doesn't
necessarily require to allocate memory and refactor the implementations.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

Use the glib allocation function that never returns NULL and remove the
now dead-code checks from all callers.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

Add a helper that concatenates the second array into the first.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

Create a wrapper for qemuBlockGetNamedNodeData named
qemuBlockGetNamedNodeData. The purpose of the wrapper is to integrate
the monitor handling functionality and in the future possible
qemuCaps-based flags.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

Allow qemu access to modify backing files in case when we want to delete
a checkpoint.

This patch adds tracking of which images need to be relabelled when
calculating the transaction, the code to relabel them and rollback.

To verify that stuff works we also output the list of images to relabel
into the test case output files in qemublocktest.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

Use the synthetic test data to verify that the algorithm correctly picks
bitmaps to merge when the bitmap is changed along with the image itself.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

Add test cases for merging various pairs of bitmaps when snapshots were
created together with checkpoints.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

Allow deleting of checkpoints when snapshots were created along. The
code tracks and modifies the checkpoint list so that backups can still
be taken with such a backing chain. This unfortunately requires to
rename few bitmaps (by copying and deleting them) in some cases.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

Add a faked qemu output which would simulate scenario where libvirt
would take a snapshot and checkpoint simultaneously. This is visible in
libvirt-2-format node where bitmap 'c' appears, but bitmap 'b' which is
active in the previous layer is not present.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

Add all intermediate steps and deletion of the current checkpoint on a
flat (single-image) disk image.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

Add test infrastructure and a basic test for bitmap deletion.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

The location of virt-aa-helper shown in the docs is incorrect.
The helper binary is installed under libexec dir.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>
Reviewed-by: NDaniel P. Berrangé <berrange@redhat.com>

The configure script allows users to specify different paths for
/etc/, /usr/sbin/, /var/run/ and /usr/libexec/. Instead of
assuming user will pass expected value, generate the apparmor
profiles using the actual values.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>
Reviewed-by: NDaniel P. Berrangé <berrange@redhat.com>

Remove all the labels that are now redundant.
Signed-off-by: NJán Tomko <jtomko@redhat.com>
Reviewed-by: NPeter Krempa <pkrempa@redhat.com>

This requires stealing one cmd pointer before returning it.
Signed-off-by: NJán Tomko <jtomko@redhat.com>
Reviewed-by: NPeter Krempa <pkrempa@redhat.com>

Mark eligible declarations as g_autofree and remove
the corresponding VIR_FREE calls.
Signed-off-by: NJán Tomko <jtomko@redhat.com>
Reviewed-by: NPeter Krempa <pkrempa@redhat.com>

qemuExtTPMSetupCgroup declares pidfile but never uses it.
Signed-off-by: NJán Tomko <jtomko@redhat.com>
Reviewed-by: NPeter Krempa <pkrempa@redhat.com>

Always trim the full specified suffix.

All of the callers outside of tests were passing either
strlen or the actual length of the string.
Signed-off-by: NJán Tomko <jtomko@redhat.com>
Reviewed-by: NPeter Krempa <pkrempa@redhat.com>

Replace all the cases that only supply the length
and do not care about matching a suffix, as well
as that one test case that does.
Signed-off-by: NJán Tomko <jtomko@redhat.com>
Reviewed-by: NPeter Krempa <pkrempa@redhat.com>

Just like the existing virBufferTrim, but only
does one thing at a time.
Signed-off-by: NJán Tomko <jtomko@redhat.com>
Reviewed-by: NPeter Krempa <pkrempa@redhat.com>

As discussed on the developer list, parallel migration connections
are not compatible with tunneled migration

https://www.redhat.com/archives/libvir-list/2020-January/msg00463.html

Prohibit the concurrent use of parallel and tunneled migration options.
Signed-off-by: NJim Fehlig <jfehlig@suse.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

LXC version 3 config files are still using network old style definition.
So, as LXC supports it now, they can be converted to use this new
definition.
Signed-off-by: NJulio Faracco <jcfaracco@gmail.com>
Reviewed-by: NMichal Privoznik <mprivozn@redhat.com>

Domain definition is useless now inside network structure. This pointer
was required because new network definition was being added each time
that a new network type appeared. So, this should be processed into
old function `lxcNetworkParseDataType()`. Now, as it was moved to an
array, it can be handle together each interface pointer.
Signed-off-by: NJulio Faracco <jcfaracco@gmail.com>
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>
Reviewed-by: NMichal Privoznik <mprivozn@redhat.com>

LXC version 3 or higher introduced indexes for network interfaces.
Libvirt should be able to parse entries like `lxc.net.2.KEY`. This
commit adds functions to parse this type of field. That's why array
structures are so important this time.
Signed-off-by: NJulio Faracco <jcfaracco@gmail.com>
Reviewed-by: NMichal Privoznik <mprivozn@redhat.com>

Struct lxcNetworkParseData is being used as a single pointer which
iterates through LXC config lines. It means that it will be applied as a
network each time that a new type appears. After, the same struct is
used to populate a new network interface. This commit changes this logic
to multiple lxcNetworkParseData to move this strcuture to an array. It
makes more sense if we are using indexes to fill interface settings.
This is better to improve code clarity.

This commit still introduces *Legacy() functions to keep support of
network old style definitions.
Signed-off-by: NJulio Faracco <jcfaracco@gmail.com>
Reviewed-by: NMichal Privoznik <mprivozn@redhat.com>

This will be the first QEMU version that will support the
kvm-no-adjvtime CPU feature.
Signed-off-by: NAndrea Bolognani <abologna@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

Now, that every use of virAtomic was replaced with its g_atomic
equivalent, let's remove the module.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>