kernel/git/next/linux-next.git/tools/testing/selftests/net, branch master

selftests: net: add ctl_file_write() helper

2026-09-11T01:46:40+00:00

Setting a sysctl or a sysfs attribute for the duration of a test and putting the old value back has been open coded multiple times. We generally avoid creating library helpers but this one is very common, and the defer is a little tricky as using the same function for defer as the initial write leads to an infinite loop (not that I would ever make such mistake!) Some of the conversions are not identical, but arguably ctl_file_write() semantics are more correct. Reviewed-by: Nimrod Oren Reviewed-by: Bobby Eshleman Link: https://patch.msgid.link/20260909180009.1894019-1-kuba@kernel.org Signed-off-by: Jakub Kicinski

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

2026-09-10T22:14:05+00:00

Cross-merge networking fixes after downstream PR (net-7.3-rc3). Conflicts: drivers/net/dsa/mt7530.c 3c18e3c9a54e ("net: dsa: mt7530: populate lpi_interfaces to fix EEE support") 10d9d8328e8a ("net: dsa: mt7530: replace mt7530_read with regmap_read") Adjacent changes: drivers/net/bonding/bond_alb.c 1746ef2e2df2 ("bonding: use skb_cow_head() in bond_do_alb_xmit() and rlb_arp_xmit()") 4cef95f72bbd ("bonding: fix u32 overflow in compute_gap()") Signed-off-by: Jakub Kicinski

selftests: net: fix repeated word 'use' in comment

2026-09-10T15:34:37+00:00

Drop the second 'use', reported by checkpatch.pl as a possible repeated word. Only touches a comment, no code changes. Signed-off-by: Hemanth Selam Reviewed-by: Andrew Lunn Link: https://patch.msgid.link/20260908052602.27497-3-hemanth.selam@gmail.com Signed-off-by: Jakub Kicinski

selftests: icmp_redirect: remove xfail support

2026-09-10T01:43:49+00:00

Commit 0a36a75c6818 ("selftests: icmp_redirect: support expected failures") added xfail support to icmp_redirect.sh because the test "IPv6: mtu exception plus redirect" was failing at the time due to a perceived kernel bug described in commit 99513cfa16c6 ("selftest: Fixes for icmp_redirect test"). However, commit 0e02bf5de46a ("selftests: icmp_redirect: IPv6 PMTU info should be cleared after redirect") subsequently fixed the test logic: after redirecting to a new path, the old PMTU information should indeed be cleared, so the test was adjusted to verify the redirect without the old PMTU. Since that fix, the test has been passing and is no longer expected to fail. Leaving xfail=1 in log_test() for all IPv6 tests was not only obsolete, but had the undesirable side effect of masking any future IPv6 failure as XFAIL instead of FAIL. Furthermore, commit 3748939bce3f ("selftests: icmp_redirect: pass xfail=0 to log_test()") had to work around a bash syntax error caused by the empty xfail argument on IPv4 tests. Remove the obsolete xfail support from log_test() and restore standard pass/fail reporting across all tests. Signed-off-by: Eric Dumazet Reviewed-by: Ido Schimmel Link: https://patch.msgid.link/20260908091327.349091-1-edumazet@google.com Signed-off-by: Jakub Kicinski

selftests/net: skip srv6_end_dt[4/6]_l3vpn_test.sh if vrftable not available

2026-09-10T00:49:10+00:00

In case iproute2 is older than version 5.11.0, released ~Feb 23, 2021, the vrftable support is not available and the tests contained in the following 2 test files - srv6_end_dt4_l3vpn_test.sh - srv6_end_dt6_l3vpn_test.sh are failing in some kernel backports. This is the result of one of those tests in an unsupported environment: ########################################################################## TEST SECTION: SRv6 VPN connectivity test among hosts in the same tenant ########################################################################## TEST: Hosts connectivity: hs-t100-1 -> hs-t100-2 (tenant 100) [FAIL] TEST: Hosts connectivity: hs-t100-2 -> hs-t100-1 (tenant 100) [FAIL] TEST: Hosts connectivity: hs-t200-3 -> hs-t200-4 (tenant 200) [FAIL] TEST: Hosts connectivity: hs-t200-4 -> hs-t200-3 (tenant 200) [FAIL] The test installs a route with the vrftable feature; if this feature is not available, the approach taken is to skip the test rather than failing it. Signed-off-by: Alessio Faina Reviewed-by: Andrea Mayer Link: https://patch.msgid.link/20260907100631.1923148-1-alessio.faina@canonical.com Signed-off-by: Jakub Kicinski

selftests: forwarding: use KHDR_INCLUDES in CFLAGS

2026-09-09T20:49:36+00:00

KHDR_INCLUDES is typically used to include headers from the kernel source directory instead of only relying on the ones from the host: they can be missing or outdated. The kselftest doc recommends assigning KHDR_INCLUDES to CFLAGS in a target Makefile. lib.mk will set KHDR_INCLUDES to "-isystem $(top_srcdir)/usr/include" if the user didn't set it, e.g. if the kernel was built in a different build directory. Other net targets have KHDR_INCLUDES added to their CFLAGS. Link: https://docs.kernel.org/dev-tools/kselftest.html#contributing-new-tests-details Signed-off-by: Matthieu Baerts (NGI0) Reviewed-by: Ilya Maximets Link: https://patch.msgid.link/20260904-net-sft-nf-khdr_includes-v1-2-92455af428e9@kernel.org Signed-off-by: Jakub Kicinski

selftests: netfilter: use KHDR_INCLUDES in CFLAGS

2026-09-09T20:49:21+00:00

KHDR_INCLUDES is typically used to include headers from the kernel source directory instead of only relying on the ones from the host: they can be missing or outdated. The kselftest doc recommends assigning KHDR_INCLUDES to CFLAGS in a target Makefile. lib.mk will set KHDR_INCLUDES to "-isystem $(top_srcdir)/usr/include" if the user didn't set it, e.g. if the kernel was built in a different build directory. Other net targets have KHDR_INCLUDES added to their CFLAGS. Link: https://docs.kernel.org/dev-tools/kselftest.html#contributing-new-tests-details Signed-off-by: Matthieu Baerts (NGI0) Reviewed-by: Ilya Maximets Link: https://patch.msgid.link/20260904-net-sft-nf-khdr_includes-v1-1-92455af428e9@kernel.org Signed-off-by: Jakub Kicinski

selftests: net: Skip so_incoming_cpu on single-CPU systems

2026-09-09T20:49:05+00:00

The test requires at least two CPUs to exercise the distribution of connections between per-CPU listeners. It currently enforces this prerequisite with an assertion, causing all test cases to fail on single-vCPU systems even though no kernel functionality was tested. Report the unsupported environment as a skip instead. Check the prerequisite before setting up the network namespace so skipped tests do not make unnecessary system changes. Link: https://bugs.launchpad.net/ubuntu-kernel-tests/+bug/2023546 Signed-off-by: Kuba Pawlak Link: https://patch.msgid.link/20260904140334.562593-1-kuba.pawlak@canonical.com Signed-off-by: Jakub Kicinski

selftests: rtnetlink: update ipsec_offload expected output

2026-09-09T20:35:24+00:00

The previous patch ("netdevsim: print IPsec salt/key in network byte order") makes the netdevsim IPsec debugfs file print salt/key in network byte order on every host, instead of host CPU byte order. Update the expected output of kci_test_ipsec_offload() to match: the values change from the little-endian-only representation to the new, endianness-independent one. No other changes are needed since the output is now the same on every architecture. This depends on the previous driver patch: applied on its own, this change would regress the test on little-endian hosts (which still print the old host-order value), though it happens to have no effect on big-endian hosts (whose old host-order output already matched). Reported-by: Kleber Sacilotto de Souza Link: https://lore.kernel.org/netdev/20220308135106.890270-1-kleber.souza@canonical.com/ Signed-off-by: Andrei Gherzan Link: https://patch.msgid.link/20260908140325.13367-3-andrei.gherzan@canonical.com Signed-off-by: Jakub Kicinski

selftests: mptcp: lib: get counters for the right test

2026-09-09T20:32:56+00:00

When the value for a MIB counter is required, mptcp_lib_get_counter is called. It tries to use the cache, if available. If not it falls back to calling 'nstat' directly by looking at the absolute counters. That's an issue for tests that don't recreate the netns for each subtest. In this case, 'nstat -a' will look at the counters for the netns. Instead, it should look at the increment for the current test, by using the history recorded in /tmp/.nstat, if available, and not using '-a' which was dumping the absolute values. While at it, rename the previous 'hist' variable to 'cache' as it was used to look at the cache, not the nstat history. Fixes: 71388a9f331d ("selftests: mptcp: lib: get counters from nstat history") Cc: stable@vger.kernel.org Reviewed-by: Geliang Tang Signed-off-by: Matthieu Baerts (NGI0) Link: https://patch.msgid.link/20260908-net-mptcp-misc-fixes-7-3-rc1-v2-12-df1de70348b6@kernel.org Signed-off-by: Jakub Kicinski