See description for patch 1.

Signed-off-by: Jakub Sitnicki <jakub@cloudflare.com>
---
Changes in v3:
- Clear metadata for non-BPF LWT encaps as well (Sashiko)
- Add selftests for LWT encap + XDP metadata
- Link to v2: https://lore.kernel.org/r/20260514-bpf-lwt-drop-skb-metadata-v2-1-458664edc2b5@cloudflare.com (local)

Changes in v2:
- Clear metadata in bpf_xmit to allow access from tc(x) egress (Daniel)
- Add WARNING snippet to the description
- Link to v1: https://lore.kernel.org/r/20260428-wip-skb-local-storage-from-scratch-v1-1-8f7ca9b378ce@cloudflare.com (local)

---
Jakub Sitnicki (2):
      net: lwtunnel: Drop skb metadata before LWT encapsulation
      selftests/bpf: Add LWT encap tests for skb metadata

 net/core/lwtunnel.c                                |   6 +
 tools/testing/selftests/bpf/config                 |   3 +
 .../bpf/prog_tests/xdp_context_test_run.c          | 175 +++++++++++++++++++++
 tools/testing/selftests/bpf/progs/test_xdp_meta.c  | 123 +++++++++------
 4 files changed, 255 insertions(+), 52 deletions(-)