selftests/net/openvswitch: add SCTP flow key support and test

The ovskey flow-string parser has no OVS_KEY_ATTR_SCTP entry, so a
flow string containing sctp(src=.../dst=...) parses without error but

selftests/net/openvswitch: add SCTP flow key support and test

The ovskey flow-string parser has no OVS_KEY_ATTR_SCTP entry, so a
flow string containing sctp(src=.../dst=...) parses without error but
silently drops the L4 key. The resulting flow carries only
ipv4(proto=132), and the kernel rejects it: match_validate() in
flow_netlink.c requires OVS_KEY_ATTR_SCTP when the IP protocol is
IPPROTO_SCTP and returns -EINVAL for the missing key.

Register OVS_KEY_ATTR_SCTP in the parse table and add a matching
selftest that verifies SCTP flow key matching (sctp src/dst port).

One listener serves the whole test. socat's fork option handles each
association in a child, so the flow rules are the only thing that
changes between the three phases and the listener is never restarted
underneath them. -t 1 bounds how long a forked child lingers after
its association closes, and the existing kill -TERM of the captured
pid on teardown removes the listener itself.

Also enable CONFIG_IP_SCTP in the selftest kernel config. The config
checker strips underscores before comparing keys, so the entry sorts
before CONFIG_IPV6 rather than after it.

Signed-off-by: Minxi Hou <houminxi@gmail.com>
Reviewed-by: Aaron Conole <aconole@redhat.com>
Link: https://patch.msgid.link/20260811181645.1918420-1-houminxi@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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openvswitch: remove support for legacy tunnel types

ovs-vswitchd doesn't use OVS_VPORT_TYPE_GRE/VXLAN/GENEVE with the
Linux kernel module since adding support for standard tunnel devices
with COLLEC

openvswitch: remove support for legacy tunnel types

ovs-vswitchd doesn't use OVS_VPORT_TYPE_GRE/VXLAN/GENEVE with the
Linux kernel module since adding support for standard tunnel devices
with COLLECT_METADATA back in 2017. The code to use them was only
activated as a fallback for old kernels, so not used in practice. And
it is now fully removed in the upcoming OVS 4.0 release.

Modern way to use tunnels with OVS is to create standard tunnel ports
with RTM_NEWLINK + COLLECT_METADATA and add them as OVS_VPORT_TYPE_NETDEV.

Device reference management and the netlink options parsing for these
legacy port types is complicated and was a CVE magnet in the previous
release cycles. Existence of these modules also makes locking analysis
for geneve module and other core tunnel devices unnecessarily more
complicated, especially in light of migration to per-netns locking.

Since there are no actual users for these port types for a very long
time, let's just remove the support entirely. There is no practical
reason to run OVS from 2017 on a recent kernel.

While it's technically a uAPI change in some sense, from the user's
perspective this removal looks indistinguishable from the kernel built
with CONFIG_OPENVSWITCH_GENEVE/VXLAN/GRE disabled. And it seems like
removal of unused drivers/modules is not a rare event these days.

A comment is added to the uAPI header noting that standard RTM_NEWLINK
with COLLECT_METADATA followed by OVS_VPORT_CMD_NEW with the simple
OVS_VPORT_TYPE_NETDEV should be used instead.

Modules responsible for these tunnel ports are removed as well as
selftests covering this functionality. Further cleanups will follow.

Signed-off-by: Ilya Maximets <i.maximets@ovn.org>
Link: https://patch.msgid.link/20260804182049.2289754-2-i.maximets@ovn.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

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

Cross-merge networking fixes after downstream PR (net-7.2-rc5).

Conflicts:

drivers/net/amt.c
3656a79f94c47 ("amt: re-read skb heade

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

Cross-merge networking fixes after downstream PR (net-7.2-rc5).

Conflicts:

drivers/net/amt.c
3656a79f94c47 ("amt: re-read skb header pointers after every pull")
586c4dcf28eb6 ("amt: no longer rely on RTNL in amt_fill_info()")
https://lore.kernel.org/amIaJr3aOQNS_Fvl@sirena.org.uk

Adjacent changes:

drivers/net/geneve.c
8efb8f8bbb35 ("geneve: require CAP_NET_ADMIN in the device netns for changelink")
0ba269933f73 ("geneve: convert config to RCU-protected pointer")

Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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selftests: openvswitch: add config file

The kselftests doc mentions that a config file should be present "if a
test needs specific kernel config options enabled". This selftest
requires some kernel

selftests: openvswitch: add config file

The kselftests doc mentions that a config file should be present "if a
test needs specific kernel config options enabled". This selftest
requires some kernel config, but no config file was provided.

We could say that a sub-target could use the parent's config file, but
the kselftests doc doesn't mention anything about that. Plus the
net/openvswitch target is the only net target without a config file.

Here is a new config file, which is a trimmed version of the net one,
with hopefully the minimal required kconfig on top of 'make defconfig'.

The Fixes tag points to the introduction of the net/openvswitch target,
just to help validating this target on stable kernels.

Fixes: 25f16c873fb1 ("selftests: add openvswitch selftest suite")
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Reviewed-by: Eelco Chaudron <echaudro@redhat.com>
Link: https://patch.msgid.link/20260710-net-sft-fix-containers-v1-2-a2915c294ef5@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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