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

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Message-ID: <20250417013301.39228-1-jdamato@fastly.com>
Date: Thu, 17 Apr 2025 01:32:38 +0000
From: Joe Damato <jdamato@...tly.com>
To: netdev@...r.kernel.org
Cc: kuba@...nel.org,
	Joe Damato <jdamato@...tly.com>,
	Alexei Starovoitov <ast@...nel.org>,
	Andrew Lunn <andrew+netdev@...n.ch>,
	bpf@...r.kernel.org (open list:XDP (eXpress Data Path):Keyword:(?:\b|_)xdp(?:\b|_)),
	Daniel Borkmann <daniel@...earbox.net>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jesper Dangaard Brouer <hawk@...nel.org>,
	John Fastabend <john.fastabend@...il.com>,
	linux-kernel@...r.kernel.org (open list),
	linux-kselftest@...r.kernel.org (open list:KERNEL SELFTEST FRAMEWORK),
	Paolo Abeni <pabeni@...hat.com>,
	Shuah Khan <shuah@...nel.org>,
	Simon Horman <horms@...nel.org>,
	Willem de Bruijn <willemb@...gle.com>,
	Xiao Liang <shaw.leon@...il.com>
Subject: [PATCH net-next v2 0/4] Fix netdevim to correctly mark NAPI IDs

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