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

selftests: drv-net: gro: signal over-coalescing more reliably

2026-06-09T10:24:04+00:00

GRO test is very timing-sensitive, packets may be delayed by the network or just sent slowly. Because of this we retry each test case up to 6 times. This makes perfect sense for positive cases, in which we want to see coalescing. Negative test cases, which modify headers and expect no coalescing should have opposite treatment. We should really try 6 times and make sure that each time the test failed. This would, however, require that we annotate each test to indicate whether its positive or negative. Let's start with a simpler improvement. Do not allow retries if we detected over-coalescing. Previously the negative case would have to get lucky at least once in 6 tries to pass. Now the first failure breaks the retry loop. For background - NICs tend to ignore the contents of the TCP timestamp option, so that test case commonly fails. In NIPA having 6 attempts, however, was enough for some NICs to get multiple successful runs in a row, getting the test cases auto-classified as expected to pass, even tho the NIC does not comply with the expectations. Signed-off-by: Jakub Kicinski Reviewed-by: Willem de Bruijn Link: https://patch.msgid.link/20260607002401.212976-1-kuba@kernel.org Signed-off-by: Paolo Abeni

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

Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

2026-05-21T22:09:02+00:00

Cross-merge networking fixes after downstream PR (net-7.1-rc5). No conflicts, adjacent changes: drivers/net/ethernet/mellanox/mlx5/core/en_txrx.c cc199cd1b912 ("net/mlx5e: Reduce branches in napi poll") c326f9c68921 ("net/mlx5e: xsk: Fix unlocked writing to ICOSQ") drivers/net/ethernet/mellanox/mlx5/core/eswitch.c c6df9a65cbb0 ("net/mlx5: Skip disabled vports when setting max TX speed") 1fba57c91416 ("net/mlx5: Add VHCA_ID page management mode support") net/mac80211/mlme.c a6e6ccd5bd07 ("wifi: mac80211: consume only present negotiated TTLM maps") 49e62ec6eb06 ("wifi: mac80211: move frame RX handling to type files") Signed-off-by: Jakub Kicinski

selftests: net: Fix checksums in xdp_native

2026-05-21T14:47:00+00:00

Data adjustment cases failed with "Data exchange failed" when using IPv4 because the program did not update the IP and UDP checksums in the IPv4 branch. The issue was masked when both IPv4 and IPv6 were configured, since the test harness prefers IPv6. While here, generalize csum_fold_helper() to fold twice so it works for any 32-bit input. Fixes: 0b65cfcef9c5 ("selftests: drv-net: Test tail-adjustment support") Reviewed-by: Carolina Jubran Reviewed-by: Dragos Tatulea Signed-off-by: Nimrod Oren Link: https://patch.msgid.link/20260520153928.3371765-1-noren@nvidia.com Signed-off-by: Jakub Kicinski

selftests: net: test PPPoE packets in gro.sh

2026-05-19T07:47:53+00:00

Add PPPoE test-cases to the GRO selftest. Only run a subset of common_tests to avoid changing the hardcoded L3 offsets everywhere. Add a new "pppoe_sid" test case to verify that packets with different PPPoE session IDs are correctly identified as separate flows and not coalesced. Signed-off-by: Qingfang Deng Link: https://patch.msgid.link/20260513013400.7467-2-qingfang.deng@linux.dev Signed-off-by: Paolo Abeni

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