[PATCH net-next v6 0/6] selftests: net: make iou-zcrx tests multithreaded

This series extends the iou-zcrx selftests to be multithreaded while
preserving existing single-threaded tests.

Patches 1 and 2 are prep fixes/cleanups. Patch 3 refactors the server's
global state. Patches 4 and 5 add the multithreaded client and server.
Finally, patch 6 adds the python side multithreaded test case.

Changes since v5:
- early return in process_recvzc in the oneshot recvs branch (David)

v5: https://lore.kernel.org/all/20260814012348.46958-1-juanlu@fastmail.com/ (local)
v4: https://lore.kernel.org/netdev/20260729221825.42773-1-juanlu@fastmail.com/ (local)
v3: https://lore.kernel.org/netdev/20260722203950.58550-1-juanlu@fastmail.com/ (local)
v2: https://lore.kernel.org/netdev/cover.1776444379.git.juanlu@fastmail.com/ (local)
v1: https://lore.kernel.org/netdev/20260408163816.2760-1-juanlu@fastmail.com/ (local)

Assisted-by: Claude:claude-opus-4-8
Signed-off-by: Juanlu Herrero <redacted>
---
Juanlu Herrero (6):
      selftests: net: fix get_refill_ring_size() to use its local variable
      selftests: net: remove unused variable in process_recvzc()
      selftests: net: refactor server state into struct thread_ctx
      selftests: net: add multithread client support to iou-zcrx
      selftests: net: add multithread server support to iou-zcrx
      selftests: net: add rss_multiqueue test variant to iou-zcrx

 tools/testing/selftests/drivers/net/hw/Makefile    |   7 +-
 tools/testing/selftests/drivers/net/hw/iou-zcrx.c  | 407 ++++++++++++++-------
 tools/testing/selftests/drivers/net/hw/iou-zcrx.py |  50 ++-
 3 files changed, 333 insertions(+), 131 deletions(-)
---
base-commit: 1bb784eb6e38fd73143f021608e4ef3095d0c0d7
change-id: 20260817-iou-zcrx-e8e46108a0bc

Best regards,
--  
Juanlu Herrero [off-list ref]