[PATCH net-next v5 0/2] selftests: openvswitch: SCTP flow key coverage (IPv6 + NAT)

[Minxi Hou <houminxi@gmail.com>]

The merged IPv4 SCTP flow-key test covers only IPv4 and only the
plain forwarding path. This series adds SCTP over IPv6, and SCTP
across conntrack NAT (ovs_nat_update_key() rewrites L4 ports on the
recirculated skb). Patch 2 translates the destination port so that
SCTP branch is load-bearing; address-only NAT cannot tell a working
branch from a missing one.

Full OVS selftest suite is 19/19 OK on a freshly built kernel
(sctp_connect_v4, sctp_connect_v6, sctp_nat_connect_v4 included).

v5 restores the series title and patch 2 subject to the v1/v2 names.
I renamed them in v3 and v4; that was a mistake.

v1: https://lore.kernel.org/netdev/20260823020942.3101898-1-houminxi@gmail.com/
v2: https://lore.kernel.org/netdev/20260902125133.1828572-1-houminxi@gmail.com/
v3: https://lore.kernel.org/netdev/20260906165251.1176875-1-houminxi@gmail.com/
v4: https://lore.kernel.org/netdev/20260909122521.2687193-1-houminxi@gmail.com/

v2:
- rebase after net-next reopened (v1 was deferred while the tree was
  closed). no code change.

v3:
- usage() tab alignment
- wait for the payload with ovs_wait instead of a bare grep
- CONFIG_NF_CT_PROTO_SCTP in the config fragment
- probe with ct(commit,nat) so kernels without NAT skip
- NAT translates the destination port (4443 -> 5555)
- commit messages: drop the INIT/DATA claim; point patch 2 at
  ovs_nat_update_key()

v4:
- keyless ipv6(proto=132) install must be EINVAL 22
- wrap a few over-80 lines; checkpatch --strict clean
- rebase onto 548b86839f7f

v5:
- TEST_LIST descriptions sit at column 48 with the rest of the file;
  shortened so expand -t 8 stays under 80
- skip the v6 test when socat has no WITH_IP6
- CONFIG_NF_NAT=m in the ovs fragment so the NAT test is not skipped
  on the reference config
- CONFIG_NETFILTER_ADVANCED=y so CONFIG_NF_CT_PROTO_SCTP is visible
  (it depends on ADVANCED; without it the symbol is dropped and the
  NAT test skips)

Signed-off-by: Minxi Hou <houminxi@gmail.com>

Minxi Hou (2):
  selftests/net/openvswitch: add SCTP flow key test over IPv6
  selftests/net/openvswitch: add SCTP flow key test across conntrack NAT

 .../testing/selftests/net/openvswitch/config  |   3 +
 .../selftests/net/openvswitch/openvswitch.sh  | 202 ++++++++++++++++++
 2 files changed, 205 insertions(+)


base-commit: 548b86839f7fb819a4d6c83b71c73ec378d24275
-- 
2.55.0