netdev - [PATCH net-next v3 0/2] netdevgenl: Add an xsk attribute to queues

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Message-ID: <20250204191108.161046-1-jdamato@fastly.com>
Date: Tue,  4 Feb 2025 19:10:46 +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>,
	Daniel Jurgens <danielj@...dia.com>,
	"David S. Miller" <davem@...emloft.net>,
	Donald Hunter <donald.hunter@...il.com>,
	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),
	Martin Karsten <mkarsten@...terloo.ca>,
	Mina Almasry <almasrymina@...gle.com>,
	Paolo Abeni <pabeni@...hat.com>,
	Shuah Khan <shuah@...nel.org>,
	Simon Horman <horms@...nel.org>,
	Stanislav Fomichev <sdf@...ichev.me>,
	Xuan Zhuo <xuanzhuo@...ux.alibaba.com>
Subject: [PATCH net-next v3 0/2] netdevgenl: Add an xsk attribute to queues

Greetings:

Welcome to v3. No functional changes, see changelog below.

This is an attempt to followup on something Jakub asked me about [1],
adding an xsk attribute to queues and more clearly documenting which
queues are linked to NAPIs...

After the RFC [2], Jakub suggested creating an empty nest for queues
which have a pool, so I've adjusted this version to work that way.

The nest can be extended in the future to express attributes about XSK
as needed. Queues which are not used for AF_XDP do not have the xsk
attribute present.

I've run the included test on:
  - my mlx5 machine (via NETIF=)
  - without setting NETIF

And the test seems to pass in both cases.

Thanks,
Joe

[1]: https://lore.kernel.org/netdev/20250113143109.60afa59a@kernel.org/
[2]: https://lore.kernel.org/netdev/20250129172431.65773-1-jdamato@fastly.com/

v3:
  - Change comment format in patch 2 to avoid kdoc warnings. No other
    changes.

v2: https://lore.kernel.org/all/20250203185828.19334-1-jdamato@fastly.com/
  - Switched from RFC to actual submission now that net-next is open
  - Adjusted patch 1 to include an empty nest as suggested by Jakub
  - Adjusted patch 2 to update the test based on changes to patch 1, and
    to incorporate some Python feedback from Jakub :)

rfc: https://lore.kernel.org/netdev/20250129172431.65773-1-jdamato@fastly.com/

Joe Damato (2):
  netdev-genl: Add an XSK attribute to queues
  selftests: drv-net: Test queue xsk attribute

 Documentation/netlink/specs/netdev.yaml       | 13 ++-
 include/uapi/linux/netdev.h                   |  6 ++
 net/core/netdev-genl.c                        | 11 +++
 tools/include/uapi/linux/netdev.h             |  6 ++
 .../testing/selftests/drivers/net/.gitignore  |  2 +
 tools/testing/selftests/drivers/net/Makefile  |  3 +
 tools/testing/selftests/drivers/net/queues.py | 35 +++++++-
 .../selftests/drivers/net/xdp_helper.c        | 89 +++++++++++++++++++
 8 files changed, 162 insertions(+), 3 deletions(-)
 create mode 100644 tools/testing/selftests/drivers/net/.gitignore
 create mode 100644 tools/testing/selftests/drivers/net/xdp_helper.c


base-commit: c2933b2befe25309f4c5cfbea0ca80909735fd76
-- 
2.43.0