seg6_build_state() rejects invalid lwtunnel configurations with a bare -EINVAL, so "ip route add ... encap seg6 ..." always reports "Invalid argument".
Patch 1 attaches an extack message to each of them. Patch 2 adds a ksft/ynl selftest that hits some rejection paths and checks the error messages. Gabriel Goller (2): net: ipv6: seg6: report lwtunnel setup errors via extack selftests: seg6: check extack messages on SRv6 lwtunnel setup net/ipv6/seg6_iptunnel.c | 25 ++- tools/testing/selftests/net/Makefile | 1 + .../selftests/net/srv6_iptunnel_extack.py | 168 ++++++++++++++++++ 3 files changed, 189 insertions(+), 5 deletions(-) create mode 100755 tools/testing/selftests/net/srv6_iptunnel_extack.py base-commit: 4bb9710c6a68d35207f123aef55dcd50e7195ec5 -- 2.47.3
