passt/test/lib, branch 2023_06_27.289301b

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

test: Remove race between commands run in the same context

2023-04-07T23:11:36+00:00

context_run() has a race condition if two commands are run in close
proximity (generally involving at least one in the background).  Because we
always use the same name for the temporary fifo files, if another command
is issued while the fifos for the first still exist, mkfifo will fail,
typically causing the entire test script to jam.

Create unique names for the temporary fifos to avoid this problem.

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/lib/test: Clean up iperf3 JSON files before starting the server

2022-11-16T14:11:25+00:00

...instead of doing it after the test. Now that we have pre-built
guest images, we might also have old JSON files from previous,
interrupted test runs.

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: Add memory/passt test cases

2022-11-04T11:01:27+00:00

These show a summary of memory usage in kernel and userspace with
different port forwarding configurations, details of userspace usage
using 'nm' (passt only uses statically allocated memory), and details
of kernel memory from slab reporting facilities.

This adds a new test image, mbuto.mem.img, with harcoded IPv4 and
IPv6 addresses and routes, and just the tools we need to start and
stop passt, to report from /proc/slabinfo, /proc/meminfo, and to
print and parse symbol sizes using nm(1).

passt can't pivot_root() for sandboxing purposes on ramfs, so we need
to create another filesystem and chroot into it, first.

We don't want to use pane context functions, as we're checking memory
usage for sockets: resort to screen-scraping.

Configure a dummy interface to provide passt with an appearance of
working IPv4 and IPv6 connectivity, contributed by David.

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