Message-ID: <20251029205123.286115-1-ast@fiberby.net>
Date: Wed, 29 Oct 2025 20:51:08 +0000
From: Asbjørn Sloth Tønnesen <ast@...erby.net>
To: "Jason A. Donenfeld" <Jason@...c4.com>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>
Cc: Asbjørn Sloth Tønnesen <ast@...erby.net>,
	Donald Hunter <donald.hunter@...il.com>,
	Simon Horman <horms@...nel.org>,
	Jacob Keller <jacob.e.keller@...el.com>,
	Andrew Lunn <andrew+netdev@...n.ch>,
	wireguard@...ts.zx2c4.com,
	netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH net-next v1 00/11] wireguard: netlink: ynl conversion

This series completes the implementation of YNL for wireguard,
as previously announced[1].

This series consist of 5 parts:
1) Patch 01-03 - Misc. changes
2) Patch    04 - Add YNL specification for wireguard
3) Patch 05-07 - Transition to a generated UAPI header
4) Patch    08 - Adds a sample program for the generated C library
5) Patch 09-11 - Transition to generated netlink policy code

The main benefit of having a YNL specification is unlocked after the
first 2 parts, the RFC version seems to already have spawned a new
Rust netlink binding[2] using wireguard as it's main example.

Part 3 and 5 validates that the specification is complete and aligned,
the generated code might have a few warts, but they don't matter too
much, and are mostly a transitional problem[3].

Part 4 is possible after part 2, but is ordered after part 3,
as it needs to duplicate the UAPI header in tools/include.

For the non-generated kernel C code the diff stat looks like this:

$ git diff --stat net-next/main..wg-ynl include/ drivers/ \
	':(exclude)*netlink_gen*'
 drivers/net/wireguard/Makefile  |   1 +
 drivers/net/wireguard/netlink.c |  70 +++---------
 include/uapi/linux/wireguard.h  | 190 ++++++--------------------------
 3 files changed, 47 insertions(+), 214 deletions(-)

[1] [PATCH net 0/4] tools: ynl-gen: misc fixes + wireguard ynl plan
    https://lore.kernel.org/r/20250901145034.525518-1-ast@fiberby.net/

[2] https://github.com/one-d-wide/netlink-bindings/

[3] https://lore.kernel.org/r/20251014123201.6ecfd146@kernel.org/

---
v1:
- Policy arguement to nla_parse_nested() changed to NULL (thanks Johannes).
- Added attr-cnt-name to the spec, to reduce the diff a bit.
- Refined the doc in the spec a bit.
- Reword commit messages a bit.
- Reordered the patches, and reduced the series from 14 to 11 patches.

RFC: https://lore.kernel.org/r/20250904-wg-ynl-rfc@fiberby.net/

diff -Naur a/sent/0904/b/0002-wireguard-netlink-validate-nested-arrays-in-policy.patch 0001-wireguard-netlink-validate-nested-arrays-in-policy.patch
diff -Naur a/sent/0904/b/0001-wireguard-netlink-use-WG_KEY_LEN-in-policies.patch 0002-wireguard-netlink-use-WG_KEY_LEN-in-policies.patch
diff -Naur a/sent/0904/b/0013-wireguard-netlink-enable-strict-genetlink-validation.patch 0003-wireguard-netlink-enable-strict-genetlink-validation.patch
diff -Naur a/sent/0904/b/0003-netlink-specs-add-specification-for-wireguard.patch 0004-netlink-specs-add-specification-for-wireguard.patch





Asbjørn Sloth Tønnesen (11):
  wireguard: netlink: validate nested arrays in policy
  wireguard: netlink: use WG_KEY_LEN in policies
  wireguard: netlink: enable strict genetlink validation
  netlink: specs: add specification for wireguard
  uapi: wireguard: move enum wg_cmd
  uapi: wireguard: move flag enums
  uapi: wireguard: generate header with ynl-gen
  tools: ynl: add sample for wireguard
  wireguard: netlink: convert to split ops
  wireguard: netlink: rename netlink handlers
  wireguard: netlink: generate netlink code

 Documentation/netlink/specs/wireguard.yaml | 307 +++++++++++++++++++++
 MAINTAINERS                                |   3 +
 drivers/net/wireguard/Makefile             |   1 +
 drivers/net/wireguard/netlink.c            |  70 +----
 drivers/net/wireguard/netlink_gen.c        |  77 ++++++
 drivers/net/wireguard/netlink_gen.h        |  29 ++
 include/uapi/linux/wireguard.h             | 190 +++----------
 tools/include/uapi/linux/wireguard.h       |  79 ++++++
 tools/net/ynl/samples/.gitignore           |   1 +
 tools/net/ynl/samples/wireguard.c          | 104 +++++++
 10 files changed, 647 insertions(+), 214 deletions(-)
 create mode 100644 Documentation/netlink/specs/wireguard.yaml
 create mode 100644 drivers/net/wireguard/netlink_gen.c
 create mode 100644 drivers/net/wireguard/netlink_gen.h
 create mode 100644 tools/include/uapi/linux/wireguard.h
 create mode 100644 tools/net/ynl/samples/wireguard.c

-- 
2.51.0

Powered by blists - more mailing lists