[PATCH net-next v3 0/6] selftests: net: multithreaded multiqueue iou-zcrx

This series extends the iou-zcrx zero-copy receive selftest to be
multithreaded while preserving existing single-threaded tests.

The first two patches are preparatory fixes/cleanups. Patch 3 is a
refactor of the server's global state. Patches 4 and 5 add the
multithreaded client and server. Patch 6 adds the python-side
multithreaded test case.

Changes since v2:
- Moved the per-queue NAPI ID query from the Python test into the C
  binary, using the netdev netlink queue-get interface; the -n option
  that passed the NAPI IDs to the binary is dropped.
- Server startup now uses a per-worker eventfd handshake so each worker
  registers its zcrx queue before the main thread queries NAPI IDs and
  dispatches connections (with checked read()/write() return values).
- Minor checkpatch style fixes.

v2: https://lore.kernel.org/netdev/20260418094907.3cde57ca@kernel.org/ (local)
v1: https://lore.kernel.org/netdev/20260408163816.2760-1-juanlu@fastmail.com/ (local)

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

 .../testing/selftests/drivers/net/hw/Makefile |  10 +-
 .../selftests/drivers/net/hw/iou-zcrx.c       | 444 +++++++++++++-----
 .../selftests/drivers/net/hw/iou-zcrx.py      |  48 +-
 3 files changed, 375 insertions(+), 127 deletions(-)


base-commit: 6deab902b4c06abadeb5242db1488a17fd614e2b
-- 
2.53.0-Meta