[PATCH net-next v2 0/4] Fix netdevim to correctly mark NAPI IDs

[Joe Damato <jdamato@fastly.com>]

Greetings:

Welcome to v2.

This series fixes netdevsim to correctly set the NAPI ID on the skb.
This is helpful for writing tests around features that use
SO_INCOMING_NAPI_ID.

In addition to the netdevsim fix in patch 1, patches 2-4 do some self
test refactoring and add a test for NAPI IDs. The test itself (patch 4)
introduces a C helper because apparently python doesn't have
socket.SO_INCOMING_NAPI_ID.

Thanks,
Joe

v2:
  - No longer an RFC
  - Minor whitespace change in patch 1 (no functional change).
  - Patches 2-4 new in v2

rfcv1: https://lore.kernel.org/netdev/20250329000030.39543-1-jdamato@fastly.com/

Joe Damato (4):
  netdevsim: Mark NAPI ID on skb in nsim_rcv
  selftests: drv-net: Factor out ksft C helpers
  selftests: net: Allow custom net ns paths
  selftests: drv-net: Test that NAPI ID is non-zero

 drivers/net/netdevsim/netdev.c                |  2 +
 .../testing/selftests/drivers/net/.gitignore  |  1 +
 tools/testing/selftests/drivers/net/Makefile  |  6 +-
 tools/testing/selftests/drivers/net/ksft.h    | 56 +++++++++++++
 .../testing/selftests/drivers/net/napi_id.py  | 24 ++++++
 .../selftests/drivers/net/napi_id_helper.c    | 83 +++++++++++++++++++
 .../selftests/drivers/net/xdp_helper.c        | 49 +----------
 tools/testing/selftests/net/lib/py/netns.py   |  4 +-
 8 files changed, 175 insertions(+), 50 deletions(-)
 create mode 100644 tools/testing/selftests/drivers/net/ksft.h
 create mode 100755 tools/testing/selftests/drivers/net/napi_id.py
 create mode 100644 tools/testing/selftests/drivers/net/napi_id_helper.c


base-commit: bbfc077d457272bcea4f14b3a28247ade99b196d
-- 
2.43.0