linux/tools/testing/selftests/drivers/net/hw/lib/py, branch master

selftests/net: Add queue leasing tests with netkit

2026-04-10T01:21:47Z

Add extensive selftests for netkit queue leasing, using io_uring zero copy test binary inside of a netns with netkit. This checks that memory providers can be bound against virtual queues in a netkit within a netns that are leasing from a physical netdev in the default netns. Also add various test cases around corner cases for the queue creation itself as well as queue info dumping and teardown in case of netkit in device pair and single mode. Signed-off-by: David Wei Co-developed-by: Daniel Borkmann Signed-off-by: Daniel Borkmann Link: https://patch.msgid.link/20260402231031.447597-15-daniel@iogearbox.net Signed-off-by: Jakub Kicinski

selftests: drv-net: xdp: Add rss_hash metadata tests

2026-03-29T21:09:08Z

This test loads xdp_metadata.bpf which calls bpf_xdp_metadata_rx_hash() on incoming packets. The metadata from that packet is then sent to a BPF map for validation. It borrows structure from xdp.py, reusing common functions. The test checks the device's xdp-rx-metadata-features via netlink before running and skips on devices that do not advertise hash support. This can be run on veth devices as well as real hardware. The test is fairly simple and just verifies that a TCP or UDP packet can be identified as an L4 flow. This minimal test also passes if run on a veth device. Signed-off-by: Chris J Arges Link: https://patch.msgid.link/20260325201139.2501937-7-carges@cloudflare.com Signed-off-by: Jakub Kicinski

selftests/net: Add env for container based tests

2026-03-06T21:11:17Z

Add an env NetDrvContEnv for container based selftests. This automates the setup of a netns, netkit pair with one inside the netns, and a BPF program that forwards skbs from the NETIF host inside the container. Currently only netkit is used, but other virtual netdevs e.g. veth can be used too. Expect netkit container datapath selftests to have a publicly routable IP prefix to assign to netkit in a container, such that packets will land on eth0. The BPF skb forward program will then forward such packets from the host netns to the container netns. Signed-off-by: David Wei Signed-off-by: Daniel Borkmann Link: https://patch.msgid.link/20260305181803.2912736-4-dw@davidwei.uk Signed-off-by: Jakub Kicinski

selftests: net: py: Add rand_ports helper method

2026-02-26T03:42:02Z

Certain tests need a unique set of ports. Successive calls to the existing rand_port method may return a duplicate port, resulting in test flakiness. The new helper keeps sockets open while building a list of ephemeral ports, thus the kernel enforces their uniqueness. Signed-off-by: Dimitri Daskalakis Link: https://patch.msgid.link/20260224224659.1507082-2-dimitri.daskalakis1@gmail.com Signed-off-by: Jakub Kicinski

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

2026-01-07T01:52:08Z

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: drv-net: introduce Iperf3Runner for measurement use cases

2025-12-02T01:18:41Z

GenerateTraffic was added to spin up long-running iperf3 load, mainly to drive high PPS background traffic. It was never meant to provide stable throughput numbers, and trying to repurpose it for measurement does not make sense. Introduce Iperf3Runner to allow tests to split out server/client configuration, control start/stop, and collect JSON output for analysis. This makes it possible to measure bandwidth directly when validating egress shaping. GenerateTraffic stays as the background load generator, reusing the common iperf3 helpers under the hood. Signed-off-by: Carolina Jubran Reviewed-by: Cosmin Ratiu Reviewed-by: Nimrod Oren Link: https://patch.msgid.link/20251130091938.4109055-3-cjubran@nvidia.com Signed-off-by: Jakub Kicinski

selftests: net: py: add test variants

2025-11-21T02:19:29Z

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: drv-net: update remaining Python init files

2025-10-12T18:03:53Z

Convert remaining __init__ files similar to what we did in commit b615879dbfea ("selftests: drv-net: make linters happy with our imports") Signed-off-by: Jakub Kicinski Signed-off-by: Stanislav Fomichev Reviewed-by: Simon Horman Signed-off-by: David S. Miller

selftests: drv-net: psp: add tests for destroying devices

2025-09-30T13:17:22Z

Add tests for making sure device can disappear while associations exist. This is netdevsim-only since destroying real devices is more tricky. Signed-off-by: Jakub Kicinski Signed-off-by: Daniel Zahka Link: https://patch.msgid.link/20250927225420.1443468-9-kuba@kernel.org Reviewed-by: Willem de Bruijn Signed-off-by: Paolo Abeni

selftests: drv-net: psp: add association tests