Subject: [PATCH net-next v4 0/8] selftest: Extend tun/virtio coverage for GSO over UDP tunnel

From: Xu Du <[email-masked]>
Date: Tue, 6 Jan 2026 09:35:13 +0800

The primary goal is to add test validation for GSO when operating over
UDP tunnels, a scenario which is not currently covered.

The design strategy is to extend the existing tun/tap testing infrastructure
to support this new use-case, rather than introducing a new or parallel framework.
This allows for better integration and re-use of existing test logic.

---
v3 -> v4:
 - Rebase onto the latest net-next tree to resolve merge conflicts.

v3: https://lore.kernel.org/netdev/[email-masked]/
 - Re-send the patch series becasue Patchwork don't update them.

v2: https://lore.kernel.org/netdev/[email-masked]/
 - Addresse sporadic failures due to too early send.
 - Refactor environment address assign helper function.
 - Fix incorrect argument passing in build packet functions.

v1: https://lore.kernel.org/netdev/[email-masked]/

Xu Du (8):
  selftest: tun: Format tun.c existing code
  selftest: tun: Introduce tuntap_helpers.h header for TUN/TAP testing
  selftest: tun: Refactor tun_delete to use tuntap_helpers
  selftest: tap: Refactor tap test to use tuntap_helpers
  selftest: tun: Add helpers for GSO over UDP tunnel
  selftest: tun: Add test for sending gso packet into tun
  selftest: tun: Add test for receiving gso packet from tun
  selftest: tun: Add test data for success and failure paths

 tools/testing/selftests/net/tap.c            | 281 +-----
 tools/testing/selftests/net/tun.c            | 919 ++++++++++++++++++-
 tools/testing/selftests/net/tuntap_helpers.h | 602 ++++++++++++
 3 files changed, 1526 insertions(+), 276 deletions(-)
 create mode 100644 tools/testing/selftests/net/tuntap_helpers.h

base-commit: c303e8b86d9dbd6868f5216272973292f7f3b7f1
-- 
2.49.0