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selftests: net: tests for add double tunneling GRO/GSO

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Create a simple, netns-based topology with double, nested UDP tunnels and
perform TSO transfers on top.

Explicitly enable GSO and/or GRO and check the skb layout consistency with
different configuration allowing (or not) GSO frames to be delivered on
the other end.

The trickest part is account in a robust way the aggregated/unaggregated
packets with double encapsulation: use a classic bpf filter for it.

Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Link: https://patch.msgid.link/61f2c98ba0f73057c2d6f6cb62eb807abd90bf6b.1769011015.git.pabeni@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Paolo Abeni
2026-01-21 17:11:36 +01:00
committed by Jakub Kicinski
parent fd0dd79657
commit 40146bf755
3 changed files with 395 additions and 0 deletions
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tools/testing/selftests/net/config
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@@ -77,6 +77,7 @@ CONFIG_NET_DROP_MONITOR=m
CONFIG_NETFILTER=y
CONFIG_NETFILTER_ADVANCED=y
CONFIG_NETFILTER_XTABLES_LEGACY=y
CONFIG_NETFILTER_XT_MATCH_BPF=m
CONFIG_NETFILTER_XT_MATCH_LENGTH=m
CONFIG_NETFILTER_XT_MATCH_POLICY=m
CONFIG_NETFILTER_XT_NAT=m