passt/test/run, branch 2025_03_20.32f6212

test: Add migration tests

2025-02-17T07:29:36+00:00

PCAP=1 ./run migrate/bidirectional gives an overview of how the
whole thing is working.

Add 12 tests in total, checking basic functionality with and without
flows in both directions, with and without sockets in half-closed
states (both inbound and outbound), migration behaviour under traffic
flood, under traffic flood with > 253 flows, and strict checking of
sequences under flood with ramp patterns in both directions.

These tests need preparation and teardown for each case, as we need
to restore the source guest in its own context and pane before we can
test again. Eventually, we could consider alternating source and
target so that we don't need to restart from scratch every time, but
that's beyond the scope of this initial test implementation.

Trick: './run migrate/*' runs all the tests with preparation and
teardown steps.

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

test: Add tests for passt in vhost-user mode

2024-11-27T15:49:21+00:00

Run functional and performance tests for vhost-user mode as well. For
functional tests, we add passt_vu and passt_vu_in_ns as symbolic links
to their non-vhost-user counterparts, as no differences are intended
but we want to distinguish them in test logs.

For performance tests, instead, we add separate perf/passt_vu_tcp and
perf/passt_vu_udp files, as we need longer test duration, as well as
higher UDP sending bandwidths and larger TCP windows, to actually get
the highest throughput vhost-user mode offers.

For valgrind tests, vhost-user mode needs two extra system calls:
statx and readlink. Add them as EXTRA_SYSCALLS for the valgrind
target.

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

test: Kernel binary can now be passed via the KERNEL environmental variable

2024-10-02T12:50:34+00:00

This is quite useful at least for myself as I'm usually running tests
using a guest kernel that's not the same as the one on the host.

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

conf: Allow address remapped to host to be configured

2024-08-21T10:00:35+00:00

Because the host and guest share the same IP address with passt/pasta, it's
not possible for the guest to directly address the host.  Therefore we
allow packets from the guest going to a special "NAT to host" address to be
redirected to the host, appearing there as though they have both source and
destination address of loopback.

Currently that special address is always the address of the default
gateway (or none).  That can be a problem if we want that gateway to be
addressable by the guest.  Therefore, allow the special "NAT to host"
address to be overridden on the command line with a new --map-host-loopback
option.

In order to exercise and test it, update the passt_in_ns and perf
tests to use this option and give different mapping addresses for the
two layers of the environment.

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

test: Add Podman system test with bats for pasta

2023-09-07T09:25:41+00:00

Ugly as hell, but we keep breaking things otherwise, and I keep
forgetting to run this manually (as long as it's based on my local
Podman setup, that's the only alternative).

We need to clone the Podman repository as distribution packages don't
contain test scripts, typically. While at it, build the latest
version which is what really matters.

As we're planning anyway to revamp the test framework, I'd be
inclined to just add this without too many thoughts, and have it as
a nice-to-have requirement reminder for the new framework.

Link: https://github.com/containers/podman/pull/19699
Suggested-by: Paul Holzinger 
Signed-off-by: Stefano Brivio 
Reviewed-by: David Gibson

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

test: Initialise ${TRACE} properly

2023-04-07T23:12:05+00:00

Unlike ${DEBUG} we don't initialize ${TRACE} to 0 if not set, which cases
failures when testing it later.  That failure acts as though it is false,
however it emits spurious errors in script.log, which can make it harder to
spot real errors.

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: 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

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