kernel/linux.git/tools/testing/selftests/net/lib/py, branch v7.2-rc1

selftests: drv-net: add userns devmem RX test

2026-06-06T01:10:31+00:00

Add userns_devmem.py, which mirrors nk_devmem.py but places the netkit guest in a netns whose owning user_ns is non-init. ncdevmem is ran there via nsenter so the bind-rx call is issued with creds that hold CAP_NET_ADMIN only in the child user_ns. Without the preceding GENL_UNS_ADMIN_PERM patch the test fails at bind-rx with EPERM, but with the patch the transfer completes and tests pass. Signed-off-by: Bobby Eshleman Acked-by: Stanislav Fomichev Link: https://patch.msgid.link/20260602-nl-prov-v2-2-ad721142c641@meta.com Signed-off-by: Jakub Kicinski

selftests: net: py: add tc utility

2026-05-06T01:15:29+00:00

Add a wrapper similar to existing ip, ethtool, ... commands. Tc takes a slightly different syntax. Account for that. The first user is the next patch in this series, converting so_txtime to drv-net. Pacing offload is supported by selected qdiscs only. Signed-off-by: Willem de Bruijn Link: https://patch.msgid.link/20260504174056.565319-3-willemdebruijn.kernel@gmail.com Signed-off-by: Jakub Kicinski

selftests: net: py: support cmd verifying expected failure

2026-05-06T01:15:29+00:00

Support negative tests, where cmd raises an exception if the command succeeded. Add optional argument expect_fail to cmd and bkg. Where fail fails the test on unexpected error, expect_fail fails it on unexpected success. Both fail on negative return code. Python subprocess may set a negative return code on process crash or timeout. Those are never anticipated failures. Signed-off-by: Willem de Bruijn Link: https://patch.msgid.link/20260504174056.565319-2-willemdebruijn.kernel@gmail.com Signed-off-by: Jakub Kicinski

selftests: net: py: add test case filtering and listing

2026-04-12T16:09:09+00:00

When developing new test cases and reproducing failures in existing ones we currently have to run the entire test which can take minutes to finish. Add command line options for test selection, modeled after kselftest_harness.h: -l list tests (filtered, if filters were specified) -t name include test -T name exclude test Since we don't have as clean separation into fixture / variant / test as kselftest_harness this is not really a 1 to 1 match. We have to lean on glob patterns instead. Like in kselftest_harness filters are evaluated in order, first match wins. If only exclusions are specified everything else is included and vice versa. Glob patterns (*, ?, [) are supported in addition to exact matching. Reviewed-by: Willem de Bruijn Tested-by: Gal Pressman Reviewed-by: Breno Leitao Link: https://patch.msgid.link/20260410013921.1710295-1-kuba@kernel.org Signed-off-by: Jakub Kicinski

selftests: net: py: explicitly forbid multiple ksft_run() calls

2026-04-10T03:38:33+00:00

People (do people still write code or is it all AI?) seem to not get that ksft_run() can only be called once. If we call it multiple times KTAP parsers will likely cut off after the first batch has finished. Link: https://patch.msgid.link/20260408221952.819822-1-kuba@kernel.org Signed-off-by: Jakub Kicinski

selftests: net: py: color the basics in the output

2026-04-07T00:47:59+00:00

Sometimes it's hard to spot the ok / not ok lines in the output. This is especially true for the GRO tests which retries a lot so there's a wall of non-fatal output printed. Try to color the crucial lines green / red / yellow when running in a terminal. Acked-by: Stanislav Fomichev Reviewed-by: Willem de Bruijn Acked-by: Joe Damato Link: https://patch.msgid.link/20260402215444.1589893-1-kuba@kernel.org Signed-off-by: Jakub Kicinski

selftests: net: move common xdp.py functions into lib

2026-03-29T21:09:08+00:00

This moves a few functions which can be useful to other python programs that manipulate XDP programs. This also refactors xdp.py to use the refactored functions. Signed-off-by: Chris J Arges Link: https://patch.msgid.link/20260325201139.2501937-6-carges@cloudflare.com Signed-off-by: Jakub Kicinski

selftests: net: py: give bpftrace more time to start

2026-03-17T02:26:37+00:00

After commit under Fixes debug runners in the CI hit the following: # subprocess.TimeoutExpired: Command '['bpftrace', '-f', 'json', '-q', '-e', 'kprobe:netpoll_poll_dev { @hits = count(); } interval:s:10 { exit(); }']' timed out after 15 seconds # # Exception| net.lib.py.ksft.KsftFailEx: bpftrace failed to run!?: {} in netpoll_basic.py >10% of the time. Let's give bpftool more time to start, it can take a while on a debug kernel. Fixes: 82562972b854 ("selftests: net: pass bpftrace timeout to cmd()") Reviewed-by: Breno Leitao Reviewed-by: Petr Machata Reviewed-by: Nimrod Oren Link: https://patch.msgid.link/20260315160038.3187730-1-kuba@kernel.org Signed-off-by: Jakub Kicinski

selftests: net: add test for Netlink policy dumps

2026-03-13T01:02:13+00:00

Add validation for the nlctrl family, accessing family info and dumping policies. TAP version 13 1..4 ok 1 nl_nlctrl.getfamily_do ok 2 nl_nlctrl.getfamily_dump ok 3 nl_nlctrl.getpolicy_dump ok 4 nl_nlctrl.getpolicy_by_op # Totals: pass:4 fail:0 xfail:0 xpass:0 skip:0 error:0 Link: https://patch.msgid.link/20260311032839.417748-5-kuba@kernel.org Signed-off-by: Jakub Kicinski

selftests: net: fix timeout passed as positional argument to communicate()

2026-03-12T02:11:40+00:00

The cited commit refactored the hardcoded timeout=5 into a parameter, but dropped the keyword from the communicate() call. Since Popen.communicate()'s first positional argument is 'input' (not 'timeout'), the timeout value is silently treated as stdin input and the call never enforces a timeout. Pass timeout as a keyword argument to restore the intended behavior. Reviewed-by: Nimrod Oren Signed-off-by: Gal Pressman Link: https://patch.msgid.link/20260310115803.2521050-3-gal@nvidia.com Signed-off-by: Jakub Kicinski