linux-stable.git/tools/testing/selftests/net/lib/py, branch v6.15

selftests: net: report output format as TAP 13 in Python tests

2025-03-03T23:03:19+00:00

The Python lib based tests report that they are producing
"KTAP version 1", but really we aren't making use of any
KTAP features, like subtests. Our output is plain TAP.

Report TAP 13 instead of KTAP 1, this is what mptcp tests do,
and what NIPA knows how to parse best. For HW testing we need
precise subtest result tracking.

Acked-by: Matthieu Baerts (NGI0) 
Link: https://patch.msgid.link/20250228180007.83325-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski

selftests: drv-net-hw: Add a test for symmetric RSS hash

2025-02-26T02:31:05+00:00

Add a selftest that verifies symmetric RSS hash is working as intended.
The test runs iterations of traffic, swapping the src/dst UDP ports, and
verifies that the same RX queue is receiving the traffic in both cases.

Reviewed-by: Nimrod Oren 
Signed-off-by: Gal Pressman 
Link: https://patch.msgid.link/20250224174416.499070-5-gal@nvidia.com
Signed-off-by: Jakub Kicinski

selftests: drv-net: Make rand_port() get a port more reliably

2025-02-26T02:31:05+00:00

Instead of guessing a port and checking whether it's available, get an
available port from the OS.

Reviewed-by: Nimrod Oren 
Signed-off-by: Gal Pressman 
Link: https://patch.msgid.link/20250224174416.499070-4-gal@nvidia.com
Signed-off-by: Jakub Kicinski

selftests: net: Add python context manager for netns entering

2025-02-21T23:28:03+00:00

Change netns of current thread and switch back on context exit.
For example:

    with NetNSEnter("ns1"):
        ip("link add dummy0 type dummy")

The command be executed in netns "ns1".

Signed-off-by: Xiao Liang 
Link: https://patch.msgid.link/20250219125039.18024-13-shaw.leon@gmail.com
Signed-off-by: Jakub Kicinski

selftests: drv-net: improve the use of ksft helpers in XSK queue test

2025-02-21T01:58:25+00:00

Avoid exceptions when xsk attr is not present, and add a proper ksft
helper for "not in" condition.

Acked-by: Stanislav Fomichev 
Reviewed-by: Joe Damato 
Tested-by: Kurt Kanzenbach 
Tested-by: Joe Damato 
Link: https://patch.msgid.link/20250219234956.520599-7-kuba@kernel.org
Signed-off-by: Jakub Kicinski

selftests: drv-net: add a way to wait for a local process

2025-02-21T01:58:25+00:00

We use wait_port_listen() extensively to wait for a process
we spawned to be ready. Not all processes will open listening
sockets. Add a method of explicitly waiting for a child to
be ready. Pass a FD to the spawned process and wait for it
to write a message to us. FD number is passed via KSFT_READY_FD
env variable.

Similarly use KSFT_WAIT_FD to let the child process for a sign
that we are done and child should exit. Sending a signal to
a child with shell=True can get tricky.

Make use of this method in the queues test to make it less flaky.

Acked-by: Stanislav Fomichev 
Acked-by: Joe Damato 
Tested-by: Joe Damato 
Link: https://patch.msgid.link/20250219234956.520599-6-kuba@kernel.org
Signed-off-by: Jakub Kicinski

selftests: drv-net: add a warning for bkg + shell + terminate

2025-02-21T01:57:29+00:00

Joe Damato reports that some shells will fork before running
the command when python does "sh -c $cmd", while bash on my
machine does an exec of $cmd directly.

This will have implications for our ability to terminate
the child process on various configurations of bash and
other shells. Warn about using

	bkg(... shell=True, termininate=True)

most background commands can hopefully exit cleanly (exit_wait).

Link: https://lore.kernel.org/Z7Yld21sv_Ip3gQx@LQ3V64L9R2
Acked-by: Stanislav Fomichev 
Acked-by: Joe Damato 
Tested-by: Joe Damato 
Link: https://patch.msgid.link/20250219234956.520599-2-kuba@kernel.org
Signed-off-by: Jakub Kicinski

selftests/net: Add selftest for IPv4 RTM_GETMULTICAST support

2025-02-11T10:26:53+00:00

This change introduces a new selftest case to verify the functionality
of dumping IPv4 multicast addresses using the RTM_GETMULTICAST netlink
message. The test utilizes the ynl library to interact with the
netlink interface and validate that the kernel correctly reports the
joined IPv4 multicast addresses.

To run the test, execute the following command:

$ vng -v --user root --cpus 16 -- \
    make -C tools/testing/selftests TARGETS=net \
    TEST_PROGS=rtnetlink.py TEST_GEN_PROGS="" run_tests

Cc: Maciej Żenczykowski 
Cc: Lorenzo Colitti 
Signed-off-by: Yuyang Huang 
Link: https://patch.msgid.link/20250207110836.2407224-2-yuyanghuang@google.com
Signed-off-by: Paolo Abeni

tools: ynl: move python code to separate sub-directory

2025-01-09T20:53:27+00:00

Move python code to a separate directory so it can be
packaged as a python module. Updates existing references
in selftests and docs.

Also rename ynl-gen-[c|rst] to ynl_gen_[c|rst], avoid
dashes as these prevent easy imports for entrypoints.

Signed-off-by: Jan Stancek 
Reviewed-by: Donald Hunter 
Link: https://patch.msgid.link/a4151bad0e6984e7164d395125ce87fd2e048bf1.1736343575.git.jstancek@redhat.com
Signed-off-by: Jakub Kicinski

selftests: drv-net: test drivers sleeping in ndo_get_stats64

2025-01-09T03:36:46+00:00

Most of our tests use rtnetlink to read device stats, so they
don't expose the drivers much to paths in which device stats
are read under RCU. Add tests which hammer profcs reads to
make sure drivers:
 - don't sleep while reporting stats,
 - can handle parallel reads,
 - can handle device going down while reading.

Set ifname on the env class in NetDrvEnv, we already do that
in NetDrvEpEnv.

  KTAP version 1
  1..7
  ok 1 stats.check_pause
  ok 2 stats.check_fec
  ok 3 stats.pkt_byte_sum
  ok 4 stats.qstat_by_ifindex
  ok 5 stats.check_down
  ok 6 stats.procfs_hammer
  # completed up/down cycles: 6
  ok 7 stats.procfs_downup_hammer
  # Totals: pass:7 fail:0 xfail:0 xpass:0 skip:0 error:0

Reviewed-by: Petr Machata 
Reviewed-by: Willem de Bruijn 
Link: https://patch.msgid.link/20250107022932.2087744-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski