linux-toradex.git/tools/testing/selftests/net/.gitignore, branch master

selftests: net: add getsockopt_iter binary to .gitignore

2026-06-10T01:48:17+00:00

The generated binary for getsockopt_iter.c shouldn't show up as an
untracked git file after running:

make -C tools/testing/selftests TARGETS=net install

Let's just ignore it.

Fixes: d39887f55d8e ("net: selftests: add getsockopt_iter regression tests")
Signed-off-by: Fernando Fernandez Mancera 
Link: https://patch.msgid.link/20260608112259.4022-1-fmancera@suse.de
Signed-off-by: Jakub Kicinski

selftests: drv-net: convert so_txtime to drv-net

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

In preparation for extending to pacing hardware offload, convert the
so_txtime.sh test to a drv-net test that can be run against netdevsim
and real hardware.

Also update so_txtime.c to not exit on first failure, but run to
completion and report exit code there. This helps with debugging
unexpected results, especially when processing multiple packets,
as happens in the "reverse_order" testcase.

Signed-off-by: Willem de Bruijn 

----

v6 -> v7

- update test to use new argument expect_fail
- v6 received Reviewed-by, but dropped due to above (minor) change

v5 -> v6

- fix order in tools/testing/selftests/drivers/net/config

v4 -> v5

- move qdisc setup/restore into each test
- add tc to utils.py (separate patch)
- test expected failure (separate patch)
- fix pylint
- convert fail to pass for timing errors if KSFT_MACHINE_SLOW
  (cmd does not special case KSFT_SKIP process returncode yet)

Responses to sashiko review

- The test converts per packet failure to errors, to continue
  testing other packets, but other error() cases are not in scope.
- The test starts sender and receiver at an absolute future time,
  like the original test. This assumes ~msec scale sync'ed clocks.
- The tc qdisc replace command works fine with noqueue. Tested
  manually.

v3 -> v4

- restore original qdisc after test
- drop unnecessary underscore in tap test names

v2 -> v3

- Makefile: so_txtime from YNL_GEN_FILES to TEST_GEN_FILES (Sashiko, NIPA)

v1 -> v2
- move so_txtime.c for net/lib to drivers/net (Jakub)
- fix drivers/net/config order (Jakub)
- detect passing when failure is expected (Jakub, Sashiko)
- pass pylint --disable=R (Jakub)
- only call ksft_run once (Jakub)
- do not sleep if waiting time is negative (Sashiko)
- add \n when converting error() to fprintf() (Sashiko)
- 4 space indentation, instead of 2 space
- increase sync delay from 100 to 200ms, to fix rare vng flakes

Link: https://patch.msgid.link/20260504174056.565319-4-willemdebruijn.kernel@gmail.com
Signed-off-by: Jakub Kicinski

selftests: net: Add kernel selftest for RFC 4884

2026-01-23T02:29:49+00:00

RFC 4884 extended certain ICMP messages with a length attribute that
encodes the length of the "original datagram" field. This is needed so
that new information could be appended to these messages without
applications thinking that it is part of the "original datagram" field.

In version 5.9, the kernel was extended with two new socket options
(SOL_IP/IP_RECVERR_4884 and SOL_IPV6/IPV6_RECVERR_RFC4884) that allow
user space to retrieve this length which is basically the offset to the
ICMP Extension Structure at the end of the ICMP message. This is
required by user space applications that need to parse the information
contained in the ICMP Extension Structure. For example, the RFC 5837
extension for tracepath.

Add a selftest that verifies correct handling of the RFC 4884 length
field for both IPv4 and IPv6, with and without extension structures,
and validates that malformed extensions are correctly reported as invalid.

For each address family, the test creates:
  - a raw socket used to send locally crafted ICMP error packets to the
    loopback address, and
  - a datagram socket used to receive the encapsulated original datagram
    and associated error metadata from the kernel error queue.

ICMP packets are constructed entirely in user space rather than relying
on kernel-generated errors. This allows the test to exercise invalid
scenarios (such as corrupted checksums and incorrect length fields) and
verify that the SO_EE_RFC4884_FLAG_INVALID flag is set as expected.

Output Example:

$ ./icmp_rfc4884
Starting 18 tests from 18 test cases.
  RUN           rfc4884.ipv4_ext_small_payload.rfc4884 ...
            OK  rfc4884.ipv4_ext_small_payload.rfc4884
ok 1 rfc4884.ipv4_ext_small_payload.rfc4884
  RUN           rfc4884.ipv4_ext.rfc4884 ...
            OK  rfc4884.ipv4_ext.rfc4884
ok 2 rfc4884.ipv4_ext.rfc4884
  RUN           rfc4884.ipv4_ext_large_payload.rfc4884 ...
            OK  rfc4884.ipv4_ext_large_payload.rfc4884
ok 3 rfc4884.ipv4_ext_large_payload.rfc4884
  RUN           rfc4884.ipv4_no_ext_small_payload.rfc4884 ...
            OK  rfc4884.ipv4_no_ext_small_payload.rfc4884
ok 4 rfc4884.ipv4_no_ext_small_payload.rfc4884
  RUN           rfc4884.ipv4_no_ext_min_payload.rfc4884 ...
            OK  rfc4884.ipv4_no_ext_min_payload.rfc4884
ok 5 rfc4884.ipv4_no_ext_min_payload.rfc4884
  RUN           rfc4884.ipv4_no_ext_large_payload.rfc4884 ...
            OK  rfc4884.ipv4_no_ext_large_payload.rfc4884
ok 6 rfc4884.ipv4_no_ext_large_payload.rfc4884
  RUN           rfc4884.ipv4_invalid_ext_checksum.rfc4884 ...
            OK  rfc4884.ipv4_invalid_ext_checksum.rfc4884
ok 7 rfc4884.ipv4_invalid_ext_checksum.rfc4884
  RUN           rfc4884.ipv4_invalid_ext_length_small.rfc4884 ...
            OK  rfc4884.ipv4_invalid_ext_length_small.rfc4884
ok 8 rfc4884.ipv4_invalid_ext_length_small.rfc4884
  RUN           rfc4884.ipv4_invalid_ext_length_large.rfc4884 ...
            OK  rfc4884.ipv4_invalid_ext_length_large.rfc4884
ok 9 rfc4884.ipv4_invalid_ext_length_large.rfc4884
  RUN           rfc4884.ipv6_ext_small_payload.rfc4884 ...
            OK  rfc4884.ipv6_ext_small_payload.rfc4884
ok 10 rfc4884.ipv6_ext_small_payload.rfc4884
  RUN           rfc4884.ipv6_ext.rfc4884 ...
            OK  rfc4884.ipv6_ext.rfc4884
ok 11 rfc4884.ipv6_ext.rfc4884
  RUN           rfc4884.ipv6_ext_large_payload.rfc4884 ...
            OK  rfc4884.ipv6_ext_large_payload.rfc4884
ok 12 rfc4884.ipv6_ext_large_payload.rfc4884
  RUN           rfc4884.ipv6_no_ext_small_payload.rfc4884 ...
            OK  rfc4884.ipv6_no_ext_small_payload.rfc4884
ok 13 rfc4884.ipv6_no_ext_small_payload.rfc4884
  RUN           rfc4884.ipv6_no_ext_min_payload.rfc4884 ...
            OK  rfc4884.ipv6_no_ext_min_payload.rfc4884
ok 14 rfc4884.ipv6_no_ext_min_payload.rfc4884
  RUN           rfc4884.ipv6_no_ext_large_payload.rfc4884 ...
            OK  rfc4884.ipv6_no_ext_large_payload.rfc4884
ok 15 rfc4884.ipv6_no_ext_large_payload.rfc4884
  RUN           rfc4884.ipv6_invalid_ext_checksum.rfc4884 ...
            OK  rfc4884.ipv6_invalid_ext_checksum.rfc4884
ok 16 rfc4884.ipv6_invalid_ext_checksum.rfc4884
  RUN           rfc4884.ipv6_invalid_ext_length_small.rfc4884 ...
            OK  rfc4884.ipv6_invalid_ext_length_small.rfc4884
ok 17 rfc4884.ipv6_invalid_ext_length_small.rfc4884
  RUN           rfc4884.ipv6_invalid_ext_length_large.rfc4884 ...
            OK  rfc4884.ipv6_invalid_ext_length_large.rfc4884
ok 18 rfc4884.ipv6_invalid_ext_length_large.rfc4884
 PASSED: 18 / 18 tests passed.
 Totals: pass:18 fail:0 xfail:0 xpass:0 skip:0 error:0

Signed-off-by: Danielle Ratson 
Reviewed-by: Ido Schimmel 
Reviewed-by: Willem de Bruijn 
Link: https://patch.msgid.link/20260121114644.2863640-1-danieller@nvidia.com
Signed-off-by: Jakub Kicinski

selftest: af_unix: Create its own .gitignore.

2025-11-26T03:52:28+00:00

Somehow AF_UNIX tests have reused ../.gitignore,
but now NIPA warns about it.

Let's create .gitignore under af_unix/.

Signed-off-by: Kuniyuki Iwashima 
Link: https://patch.msgid.link/20251124212805.486235-2-kuniyu@google.com
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

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

2025-11-20T17:13:26+00:00

Cross-merge networking fixes after downstream PR (net-6.18-rc7).

No conflicts, adjacent changes:

tools/testing/selftests/net/af_unix/Makefile
  e1bb28bf13f4 ("selftest: af_unix: Add test for SO_PEEK_OFF.")
  45a1cd8346ca ("selftests: af_unix: Add tests for ECONNRESET and EOF semantics")

Signed-off-by: Jakub Kicinski

selftest: af_unix: Add test for SO_PEEK_OFF.

2025-11-19T03:19:09+00:00

The test covers various cases to verify SO_PEEK_OFF behaviour
for all AF_UNIX socket types.

two_chunks_blocking and two_chunks_overlap_blocking reproduce
the issue mentioned in the previous patch.

Without the patch, the two tests fail:

  #  RUN           so_peek_off.stream.two_chunks_blocking ...
  # so_peek_off.c:121:two_chunks_blocking:Expected 'bbbb' == 'aaaabbbb'.
  # two_chunks_blocking: Test terminated by assertion
  #          FAIL  so_peek_off.stream.two_chunks_blocking
  not ok 3 so_peek_off.stream.two_chunks_blocking

  #  RUN           so_peek_off.stream.two_chunks_overlap_blocking ...
  # so_peek_off.c:159:two_chunks_overlap_blocking:Expected 'bbbb' == 'aaaabbbb'.
  # two_chunks_overlap_blocking: Test terminated by assertion
  #          FAIL  so_peek_off.stream.two_chunks_overlap_blocking
  not ok 5 so_peek_off.stream.two_chunks_overlap_blocking

With the patch, all tests pass:

  # PASSED: 15 / 15 tests passed.
  # Totals: pass:15 fail:0 xfail:0 xpass:0 skip:0 error:0

Signed-off-by: Kuniyuki Iwashima 
Link: https://patch.msgid.link/20251117174740.3684604-3-kuniyu@google.com
Signed-off-by: Jakub Kicinski

selftests: af_unix: Add tests for ECONNRESET and EOF semantics

2025-11-18T10:33:17+00:00

Add selftests to verify and document Linux’s intended behaviour for
UNIX domain sockets (SOCK_STREAM and SOCK_DGRAM) when a peer closes.
The tests verify that:

 1. SOCK_STREAM returns EOF when the peer closes normally.
 2. SOCK_STREAM returns ECONNRESET if the peer closes with unread data.
 3. SOCK_SEQPACKET returns EOF when the peer closes normally.
 4. SOCK_SEQPACKET returns ECONNRESET if the peer closes with unread data.
 5. SOCK_DGRAM does not return ECONNRESET when the peer closes.

This follows up on review feedback suggesting a selftest to clarify
Linux’s semantics.

Suggested-by: Kuniyuki Iwashima 
Signed-off-by: Sunday Adelodun 
Link: https://patch.msgid.link/20251113112802.44657-1-adelodunolaoluwa@yahoo.com
Signed-off-by: Paolo Abeni

selftests/net: add tcp_port_share to .gitignore

2025-09-30T15:30:26+00:00

Add the tcp_port_share test binary to .gitignore to avoid
accidentally staging the build artifact.

Signed-off-by: Gopi Krishna Menon 
Reviewed-by: Simon Horman 
Link: https://patch.msgid.link/20250929163140.122383-1-krishnagopi487@gmail.com
Signed-off-by: Jakub Kicinski

selftests: net: add test for ipv6 fragmentation

2025-09-09T09:43:59+00:00

Add selftest for the IPv6 fragmentation regression which affected
several stable kernels.

Commit a18dfa9925b9 ("ipv6: save dontfrag in cork") was backported to
stable without some prerequisite commits.  This caused a regression when
sending IPv6 UDP packets by preventing fragmentation and instead
returning -1 (EMSGSIZE).

Add selftest to check for this issue by attempting to send a packet
larger than the interface MTU. The packet will be fragmented on a
working kernel, with sendmsg(2) correctly returning the expected number
of bytes sent.  When the regression is present, sendmsg returns -1 and
sets errno to EMSGSIZE.

Link: https://lore.kernel.org/stable/aElivdUXqd1OqgMY@karahi.gladserv.com
Signed-off-by: Brett A C Sheffield 
Reviewed-by: Willem de Bruijn 
Link: https://patch.msgid.link/20250903154925.13481-1-bacs@librecast.net
Signed-off-by: Paolo Abeni