passt/test/lib/setup, branch 2024_05_10.7288448

test: Use "nstool exec" to slightly simplify tests

2023-04-07T23:12:08+00:00

Using this, rather than using "nstool info" to get the pid then manually
connecting with nsenter makes things a little simpler.

Signed-off-by: David Gibson 
Signed-off-by: Stefano Brivio

nstool: Replace "pid" subcommand with "info" subcommand

2023-04-07T23:11:52+00:00

The new subcommand gives more information about the holder process and its
namespace, and may be further extended in future.  Add some options which
give the old behaviour for existing scripts.

Signed-off-by: David Gibson 
Signed-off-by: Stefano Brivio

nstool: Reverse parameters to nstool

2023-04-07T23:11:43+00:00

Having the "subcommand" first is more conventional and will make it more
natural for future extensions I have planned.

Signed-off-by: David Gibson 
Signed-off-by: Stefano Brivio

nstool: Rename nsholder to nstool

2023-04-07T23:11:41+00:00

In preparation for extending what it does.

Signed-off-by: David Gibson 
Signed-off-by: Stefano Brivio

passt: Relicense to GPL 2.0, or any later version

2023-04-06T16:00:33+00:00

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

test: Switch to qemu -netdev stream option instead of using qrap

2022-11-04T11:04:32+00:00

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

test: Wait for network before starting passt in two_guests setup

2022-11-04T11:04:32+00:00

As pasta now configures that target network namespace with
--config-net, we need to wait for addresses and routes to be actually
present. Just sending netlink messages doesn't mean this is done
synchronously.

A more elegant alternative, which probably makes sense regardless of
this test setup, would be to query, from pasta, addresses and routes
we added, and wait until they're there, before proceeding.

Signed-off-by: Stefano Brivio

test/lib: Move screen-scraping setup and layout functions to _ugly files

2022-11-04T11:01:05+00:00

I'm going to add yet another one of those, for which I have no quick
solution. It's a regression in some sense, but at least if we make
this regression more observable and defined, it should be easier to
find a comprehensive solution later, within this or another testing
framework.

Signed-off-by: Stefano Brivio 
Reviewed-by: David Gibson

test: Add log file tests for pasta plus corresponding layout and setup

2022-10-26T04:28:41+00:00

To test log files on a tmpfs mount, we need to unshare the mount
namespace, which means using a context for the passt pane is not
really practical at the moment, as we can't open a shell there, so
we would have to encapsulate all the commands under 'unshare -rUm',
plus the "inner" pasta command, running in turn a tcp_rr server.

It might be worth fixing this by e.g. detecting we are trying to
spawn an interactive shell and adding a special path in the context
setup with some form of stdin redirection -- I'm not sure it's doable
though.

For this reason, add a new layout, using a context only for the host
pane, while keeping the old command dispatch mechanism for the passt
pane.

We also need a new setup function that doesn't start pasta: we want
to start and restart it with different options.

Further, we need a 'pint' directive, to send an interrupt to the
passt pane: add that in lib/test.

All the tests before the one involving tmpfs and a detached mount
namespace were also tested with the context mechanism. To make an
eventual conversion easier, pass tcp_crr directly as a command on
pasta's command line where feasible.

While at it, fix the comment to the teardown_pasta() function.

The new test set can be semi-conveniently run as:

  ./run pasta_options/log_to_file

and it checks basic log creation, size of the log file after flooding
it with debug entries, rotations, and basic consistency after
rotations, on both an existing filesystem and a tmpfs, chosen as
it doesn't support collapsing data ranges via fallocate(), hence
triggering the fall-back mechanism for logging rotation.

Signed-off-by: Stefano Brivio

test: Use --config-net for namespace setup

2022-09-29T10:21:13+00:00

The setup functions for passt_in_ns and two_guests perform some fairly slow
dhclient calls to configure the network in the namespace before starting
the guest.  This isn't really part of the tests, just necessary for the
operations later.

We can simplify and speed this up a bit by using pasta's '--config-net'
option to configure the networking for us.  As a bonus this means we have
at least a minimal test of the --config-net option itself.

Signed-off-by: David Gibson 
Signed-off-by: Stefano Brivio