In practical terms, passt doesn't benefit from the additional
protection offered by the AGPL over the GPL, because it's not
suitable to be executed over a computer network.

Further, restricting the distribution under the version 3 of the GPL
wouldn't provide any practical advantage either, as long as the passt
codebase is concerned, and might cause unnecessary compatibility
dilemmas.

Change licensing terms to the GNU General Public License Version 2,
or any later version, with written permission from all current and
past contributors, namely: myself, David Gibson, Laine Stump, Andrea
Bolognani, Paul Holzinger, Richard W.M. Jones, Chris Kuhn, Florian
Weimer, Giuseppe Scrivano, Stefan Hajnoczi, and Vasiliy Ulyanov.

Signed-off-by: Stefano Brivio <sbrivio@redhat.com>

qemu commit 13c6be96618c ("net: stream: add unix socket") introduces
support for native AF_UNIX support, finally making qrap useless.

We can't quite drop that yet until a qemu release includes it, and
then we'll need to wait a while for users to switch anyway, but at
least for tests, we can use that support.

Signed-off-by: Stefano Brivio <sbrivio@redhat.com>

If we use dhclient without creating a complete network configuration,
systemd-resolved will stop working after a while, and this sometimes
happens while we're still installing packages.

Disable it, together with systemd-networkd, while taking care of
removing the dhclient hook that prevents overriding /etc/resolv.conf.

While at it, it looks like removing snapd and needrestart actually
takes more time than keeping them: drop that line.

Signed-off-by: Stefano Brivio <sbrivio@redhat.com>

Instead of using the 'temp' and 'tempdir' DSL directives to create
temporary files, use fixed paths relative to __STATEDIR__.  This has two
advantages:
  1) The files are automatically cleaned up if the tests fail (and even if
     that doesn't work they're easier to clean up manuall)
  2) When debugging tests it's easier to figure out which of the temporary
     files are relevant to whatever's going wrong

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

On new Ubuntu 22.04 images, stopping systemd-resolved to get the
dhclient script override resolv.conf doesn't work anymore. I
originally used that hack to avoid introducing a delay which is
needed when running it on TCG.

Keep systemd-resolved running instead, and wait for it to be ready
by retrying to resolve a domain a few times before installing
packages, so that we don't add another ugly delay that might
unnecessarily slow down things even further.

Signed-off-by: Stefano Brivio <sbrivio@redhat.com>

We've recently converted most of our tests to use socat instead of
nc/netcat/ncat, because socat is more powerful and we don't need to deal
with the several possible variants of netcat.

We still use nc or ncat for the distro tests.  Because there we control
the guest environment and can pick our tools, there isn't the same reason
to switch to socat.  However, using socat here as well makes the tests
a bit easier to read, and doesn't require people reading or modifying them
to become familiar with an additional tool.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
[sbrivio: keep using netcat-openbsd in Ubuntu 16.04 ppc64 test, as socat
 is unavailable there]
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>

Distribution packages reasonably expect to have a human-readable
Markdown version of the README under /usr/share/doc/, but all we have
right now is a heavily web-oriented version.

Introduce a ugly hack to strip web-oriented parts from the current
README and install it.

It should probably work the other way around: a human-readable README
could be used as a source for the web page. But cgit needs a file
that's in the tree, not something that can be built, and
https://passt.top/ is based on cgit. It should eventually be doable
to work around this in cgit, instead.

Reported-by: Benson Muite <benson_muite@emailplus.org>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>

The Fedora test file extracts some information from the host resolv.conf
into a DNS6 variable which is then never used.  Remove this unnecessary
step, which is presumably a leftover from an earlier iteration.

This was the only user of 'head' and 'sed' in the test file, so those can
also be removed from the required tools.  The debian and ubuntu test files
also listed 'head' and 'sed' as tools, although they don't use them,
I'm guessing because of an earlier version which had the same DNS6 code.
Remove those as well.

The opensuse test file still actually uses DNS6, so leave it there for now.
The DNS handling and network config handling for SuSE looks to be kind of
broken, but fixing that is a job for another day.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

Before booting the guest images, the distro test cases need to modify the
guest images, using virt-edit and guestfish, to boot in the way we need.
At present this gets repeated on every test run, even though it's not
really doing anything we want to test for.

In addition many of the images have the same preparation steps leading to
a lot of duplicated stages in the tests.  A number of additional images can
be prepared using common steps, even if the ones used now have small
differences.

Therefore move the preparation of most of the guest images to the asset
build phase, where they can be done a single time for multiple test runs,
using a common preparation script.  We can even avoid making a copy of the
disk image for booting, by using qemu's -snapshot option.

A few of the distros (openSUSE and older Ubuntu) do need different steps.
For now we don't chage how they are run, they could possibly be handled
more like this in future.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

Rather than directly download distro images from the test scripts, handle
all the downloads during the test asset build, then just clone them for
the tests themselves.  This avoids repeated downloads which can be very
slow when debugging failing tests.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
[sbrivio: Add OPENSUSE_IMGS to DOWNLOAD_ASSETS in Makefile, and note
 that xzcat doesn't take a -O option in test/distro/opensuse]
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>