kernel/linux.git/tools/testing/selftests/net/lib, branch v6.19.11

selftests: drv-net: Bring back tool() to driver inits

2026-01-07T01:52:08+00:00

The pp_alloc_fail.py test (which doesn't run in NIPA CI?) uses tool, add back the import. Resolves: ImportError: cannot import name 'tool' from 'lib.py' Fixes: 68a052239fc4 ("selftests: drv-net: update remaining Python init files") Reviewed-by: Nimrod Oren Signed-off-by: Gal Pressman Link: https://patch.msgid.link/20260105163319.47619-1-gal@nvidia.com Signed-off-by: Jakub Kicinski

selftests: net: Fix build warnings

2025-12-10T09:11:12+00:00

Fix ksft.h: In function ‘ksft_ready’: ksft.h:27:9: warning: ignoring return value of ‘write’ declared with attribute ‘warn_unused_result’ ksft.h: In function ‘ksft_wait’: ksft.h:51:9: warning: ignoring return value of ‘read’ declared with attribute ‘warn_unused_result’ by checking the return value of the affected functions and displaying an error message if an error is seen. Fixes: 2b6d490b82668 ("selftests: drv-net: Factor out ksft C helpers") Cc: Joe Damato Signed-off-by: Guenter Roeck Link: https://patch.msgid.link/20251205171010.515236-11-linux@roeck-us.net Signed-off-by: Jakub Kicinski

selftests: net: py: handle interrupt during cleanup

2025-12-01T20:01:29+00:00

Following up on the old discussion [1]. Let the BaseExceptions out of defer()'ed cleanup. And handle it in the main loop. This allows us to exit the tests if user hit Ctrl-C during defer(). Link: https://lore.kernel.org/20251119063228.3adfd743@kernel.org # [1] Reviewed-by: Simon Horman Reviewed-by: Petr Machata Link: https://patch.msgid.link/20251128004846.2602687-1-kuba@kernel.org Signed-off-by: Jakub Kicinski

selftests: net: remove old setup_* scripts

2025-11-21T02:19:31+00:00

gro.sh and toeplitz.sh used to source in one of two setup scripts depending on whether the test was expected to be run against veth or a real device. veth testing is replaced by netdevsim and existing "remote endpoint" support in our Python tests. Add a script which sets up loopback mode. The usage is a little bit more complicated than running the scripts used to be. Testing used to work like this: ./../gro.sh -i eth0 ... now the "setup script" has to be run explicitly: NETIF=eth0 ./../ksft_setup_loopback.sh ./../gro.sh But the functionality itself is retained. Reviewed-by: Petr Machata Reviewed-by: Willem de Bruijn Link: https://patch.msgid.link/20251120021024.2944527-13-kuba@kernel.org Signed-off-by: Jakub Kicinski

selftests: net: py: read ip link info about remote dev

2025-11-21T02:19:29+00:00

We're already saving the info about the local dev in env.dev for the tests, save remote dev as well. This is more symmetric, env generally provides the same info for local and remote end. While at it make sure that we reliably get the detailed info about the local dev. nsim used to read the dev info without -d. Reviewed-by: Petr Machata Reviewed-by: Willem de Bruijn Link: https://patch.msgid.link/20251120021024.2944527-8-kuba@kernel.org Signed-off-by: Jakub Kicinski

selftests: net: py: support ksft ready without wait

2025-11-21T02:19:29+00:00

There's a common synchronization problem when a script (Python test) uses a C program to set up some state (usually start a receiving process for traffic). The script needs to know when the process has fully initialized. The inverse of the problem exists for shutting the process down - we need a reliable way to tell the process to exit. We added helpers to do this safely in commit 71477137994f ("selftests: drv-net: add a way to wait for a local process") unfortunately the two operations (wait for init, and shutdown) are controlled by a single parameter (ksft_wait). Add support for using ksft_ready without using the second fd for exit. This is useful for programs which wait for a specific number of packets to rx so exit_wait is a good match, but we still need to wait for init. Reviewed-by: Petr Machata Reviewed-by: Willem de Bruijn Reviewed-by: breno Leitao Link: https://patch.msgid.link/20251120021024.2944527-7-kuba@kernel.org Signed-off-by: Jakub Kicinski

selftests: net: relocate gro and toeplitz tests to drivers/net

2025-11-21T02:19:29+00:00

The GRO test can run on a real device or a veth. The Toeplitz hash test can only run on a real device. Move them from net/ to drivers/net/ and drivers/net/hw/ respectively. There are two scripts which set up the environment for these tests setup_loopback.sh and setup_veth.sh. Move those scripts to net/lib. The paths to the setup files are a little ugly but they will be deleted shortly. toeplitz_client.sh is not a test in itself, but rather a helper to send traffic, so add it to TEST_FILES rather than TEST_PROGS. Reviewed-by: Petr Machata Reviewed-by: Willem de Bruijn Link: https://patch.msgid.link/20251120021024.2944527-6-kuba@kernel.org Signed-off-by: Jakub Kicinski

selftests: net: py: add test variants

2025-11-21T02:19:29+00:00

There's a lot of cases where we try to re-run the same code with different parameters. We currently need to either use a generator method or create a "main" case implementation which then gets called by trivial case functions: def _test(x, y, z): ... def case_int(): _test(1, 2, 3) def case_str(): _test('a', 'b', 'c') Add support for variants, similar to kselftests_harness.h and a lot of other frameworks. Variants can be added as decorator to test functions: @ksft_variants([(1, 2, 3), ('a', 'b', 'c')]) def case(x, y, z): ... ksft_run() will auto-generate case names: case.1_2_3 case.a_b_c Because the names may not always be pretty (and to avoid forcing classes to implement case-friendly __str__()) add a wrapper class KsftNamedVariant which lets the user specify the name for the variant. Note that ksft_run's args are still supported. ksft_run splices args and variant params together. Reviewed-by: Willem de Bruijn Reviewed-by: Petr Machata Link: https://patch.msgid.link/20251120021024.2944527-4-kuba@kernel.org Signed-off-by: Jakub Kicinski

selftests: net: py: extract the case generation logic

2025-11-21T02:19:29+00:00

In preparation for adding test variants move the test case collection logic to a dedicated function. New helper returns (function, args, name, ) tuples. The main test loop can simply run them, not much logic or discernment needed. Reviewed-by: Petr Machata Reviewed-by: Willem de Bruijn Link: https://patch.msgid.link/20251120021024.2944527-3-kuba@kernel.org Signed-off-by: Jakub Kicinski

selftests: net: py: coding style improvements

2025-11-21T02:19:28+00:00

We're about to add more features here and finding new issues with old ones in place is hard. Address ruff checks: - bare exceptions - f-string with no params - unused import We need to use BaseException when handling defer(), as Petr points out. This retains the old behavior of ignoring SIGTERM while running cleanups. Reviewed-by: Willem de Bruijn Reviewed-by: Petr Machata Link: https://patch.msgid.link/20251120021024.2944527-2-kuba@kernel.org Signed-off-by: Jakub Kicinski

kernel/linux.git/tools/testing/selftests/net/lib, branch v6.19.11

selftests: drv-net: Bring back tool() to driver __init__s

selftests: net: Fix build warnings

selftests: net: py: handle interrupt during cleanup

selftests: net: remove old setup_* scripts

selftests: net: py: read ip link info about remote dev

selftests: net: py: support ksft ready without wait

selftests: net: relocate gro and toeplitz tests to drivers/net

selftests: net: py: add test variants

selftests: net: py: extract the case generation logic

selftests: net: py: coding style improvements

selftests: drv-net: Bring back tool() to driver inits