linux.git/tools/testing/selftests/net/forwarding, branch v6.17

selftest: forwarding: router: Add a test case for IPv4 link-local source IP

2025-08-15T17:44:48+00:00

Add a test case which checks that packets with an IPv4 link-local source
IP are forwarded and not dropped.

Signed-off-by: Ido Schimmel 
Signed-off-by: Petr Machata 
Link: https://patch.msgid.link/3c2e0b17d99530f57bef5ddff9af284fa0c9b667.1755174341.git.petrm@nvidia.com
Signed-off-by: Jakub Kicinski

selftests: net/forwarding: test purge of active DWRR classes

2025-08-14T01:11:48+00:00

Extend sch_ets.sh to add a reproducer for problematic list deletions when
active DWRR class are purged by ets_qdisc_change() [1] [2].

[1] https://lore.kernel.org/netdev/e08c7f4a6882f260011909a868311c6e9b54f3e4.1639153474.git.dcaratti@redhat.com/
[2] https://lore.kernel.org/netdev/f3b9bacc73145f265c19ab80785933da5b7cbdec.1754581577.git.dcaratti@redhat.com/

Suggested-by: Victor Nogueira 
Signed-off-by: Davide Caratti 
Acked-by: Victor Nogueira 
Link: https://patch.msgid.link/489497cb781af7389011ca1591fb702a7391f5e7.1755016081.git.dcaratti@redhat.com
Signed-off-by: Jakub Kicinski

selftests: tc: Add generic erspan_opts matching support for tc-flower

2025-07-21T23:12:09+00:00

Add test cases to tc_flower.sh to validate generic matching on ERSPAN
options. Both ERSPAN Type II and Type III are covered.

Also add check_tc_erspan_support() to verify whether tc supports
erspan_opts.

Signed-off-by: Li Shuang 
Reviewed-by: Xin Long 
Link: https://patch.msgid.link/1f354a1afd60f29bbbf02bd60cb52ecfc0b6bd17.1752848172.git.shuali@redhat.com
Signed-off-by: Jakub Kicinski

selftests: forwarding: lib: Split setup_wait()

2025-06-27T00:53:07+00:00

setup_wait() takes an optional argument and then is called from the top
level of the test script. That confuses shellcheck, which thinks that maybe
the intention is to pass $1 of the script to the function, which is never
the case. To avoid having to annotate every single new test with a SC
disable, split the function in two: one that takes a mandatory argument,
and one that takes no argument at all.

Convert the two existing users of that optional argument, both in Spectrum
resource selftest, to use the new form. Clean up vxlan_bridge_1q_mc_ul.sh
to not pass a now-unused argument.

Signed-off-by: Petr Machata 
Link: https://patch.msgid.link/8e13123236fe3912ae29bc04a1528bdd8551da1f.1750847794.git.petrm@nvidia.com
Signed-off-by: Jakub Kicinski

selftests: forwarding: Add a test for verifying VXLAN MC underlay

2025-06-18T01:18:46+00:00

Add tests for MC-routing underlay VXLAN traffic.

Signed-off-by: Petr Machata 
Link: https://patch.msgid.link/eecd2c0fefc754182e74be8e8e65751bf5749c21.1750113335.git.petrm@nvidia.com
Signed-off-by: Jakub Kicinski

selftests: forwarding: adf_mcd_start(): Allow configuring custom interfaces

2025-06-18T01:18:46+00:00

Tests may wish to add other interfaces to listen on. Notably locally
generated traffic uses dummy interfaces. The multicast daemon needs to know
about these so that it allows forming rules that involve these interfaces,
and so that net.ipv4.conf.X.mc_forwarding is set for the interfaces.

To that end, allow passing in a list of interfaces to configure in addition
to all the physical ones.

Signed-off-by: Petr Machata 
Reviewed-by: Nikolay Aleksandrov 
Link: https://patch.msgid.link/2e8d83297985933be4850f2b9f296b3c27110388.1750113335.git.petrm@nvidia.com
Signed-off-by: Jakub Kicinski

selftests: forwarding: lib: Move smcrouted helpers here

2025-06-18T01:18:46+00:00

router_multicast.sh has several helpers for work with smcrouted. Extract
them to lib.sh so that other selftests can use them as well. Convert the
helpers to defer in the process, because that simplifies the interface
quite a bit. Therefore have router_multicast.sh invoke
defer_scopes_cleanup() in its cleanup() function.

Signed-off-by: Petr Machata 
Link: https://patch.msgid.link/410411c1a81225ce6e44542289b9c3ec21e5786c.1750113335.git.petrm@nvidia.com
Signed-off-by: Jakub Kicinski

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

2025-05-01T22:11:38+00:00

Cross-merge networking fixes after downstream PR (net-6.15-rc5).

No conflicts or adjacent changes.

Signed-off-by: Jakub Kicinski

selftests: net: tc_taprio: new test

2025-04-29T21:44:34+00:00

Add a forwarding path test for tc-taprio, based on isochron. This is
specifically intended for NICs with an offloaded data path (switchdev/DSA)
and requires taprio 'flags 2'. Also, $h1 and $h2 must support hardware
timestamping, and $h1 tc-etf offload, for isochron to work.

Packets received by a switch while the egress port has a taprio schedule
with an open gate for the traffic class must be sent right away.

Packets received by the switch while the traffic class gate must be
delayed until it opens.

Packets received by the switch must be dropped if the gate for the
traffic class never opens.

Packets should pass if the maximum SDU for the traffic class allows it,
and should be dropped otherwise.

The schedule should auto-update itself if clock jumps take place while
taprio is installed. Repeat most of the above tests after forcing two
clock jumps, one backwards (in Jan 1970) and one back into the present.

Symlink it from tools/testing/selftests/drivers/net/dsa, because usually
DSA ports have the same MAC address, and we need STABLE_MAC_ADDRS=yes
from its forwarding.config for the test to run successfully.

Signed-off-by: Vladimir Oltean 
Link: https://patch.msgid.link/20250426144859.3128352-5-vladimir.oltean@nxp.com
Signed-off-by: Jakub Kicinski

selftests: net: tsn_lib: add window_size argument to isochron_do()

2025-04-29T21:44:34+00:00

Make out-of-band testing (send a packet when its traffic class gate is
closed, expecting it to be delayed) more predictable by allowing the
window size to be customized by isochron_do().

From man isochron-send, the window size alters the advance time (the
delta between the transmission time of the packet, and its expected TX
time when using SO_TXTIME or tc-taprio on the sender). In absence of the
argument, isochron-send defaults to maximizing the advance time (making
it equal to the cycle length).

The default behavior is exactly what is problematic. An advance time
that is too large will make packets intended to be out-of-band still be
potentially in-band with an open gate from the schedule's previous cycle.
We need to allow that advance time to be reduced.

Perhaps a bit confusingly, isochron_do() has a shift_time argument
currently, but that does not help here. The shift time shifts both the
user space wakeup time and the expected TX time by equal amounts, it is
unable of bringing them closer to one another.

Set the window size properly for the Ocelot PSFP selftest as well.
That used to work due to a very carefully chosen SHIFT_TIME_NS.
I've re-tested that the test still works properly.

Signed-off-by: Vladimir Oltean 
Link: https://patch.msgid.link/20250426144859.3128352-4-vladimir.oltean@nxp.com
Signed-off-by: Jakub Kicinski