[PATCH net-next v3 0/2] seg6: skip route refcounts in seg6local lookups

seg6local looks up the nexthop of its IPv6 and IPv4 behaviors from the
RCU read-side section of the receive path, yet takes and drops a route
reference for every packet.  Skip the reference, as ip6_route_input()
and ip_rcv_finish() do.

---
Changes in v3:
- Keep the refcounted lookup in seg6_lookup_nexthop() and give
  seg6_lookup_any_nexthop() a noref argument instead, so the BPF LWT
  helpers see no change while a route is released (Andrea Mayer,
  Gabriel Goller, Sashiko).
- Mention NFQUEUE reinjection and the release race in the commit
  messages (Andrea Mayer).
- Link to v2: https://patch.msgid.link/20261010-seg6-lookup-noref-v2-0-51c09dd98197@gmail.com (local)

Changes in v2:
- Split the lookup into a noref primitive for the seg6local input
  actions and a refcounted seg6_lookup_nexthop() wrapper, which the BPF
  LWT helpers also call (Andrea Mayer, Sashiko).
- Rebase onto net-next and re-measure.
- Link to v1: https://patch.msgid.link/20261005-seg6-lookup-noref-v1-0-092e84774e80@gmail.com (local)

---
Yuya Kusakabe (2):
      seg6: skip the route refcount in seg6local IPv6 lookups
      seg6: skip the route refcount in seg6local IPv4 lookups

 net/ipv6/seg6_local.c | 52 ++++++++++++++++++++++++++++++++++++---------------
 1 file changed, 37 insertions(+), 15 deletions(-)
---
base-commit: 758fe10f83a655bed0f7b98fcfacdfc3556fb9a1
change-id: 20261004-seg6-lookup-noref-e016495b60ed

Best regards,
--  
Yuya Kusakabe [off-list ref]