netdev - [PATCH RFC ipsec-next] pfkey: Deprecate pfkey

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Message-ID: <aGd60lOmCtytjTYU@gauss3.secunet.de>
Date: Fri, 4 Jul 2025 08:55:14 +0200
From: Steffen Klassert <steffen.klassert@...unet.com>
To: Herbert Xu <herbert@...dor.apana.org.au>, Paul Wouters <paul@...ats.ca>,
	Andreas Steffen <andreas.steffen@...ongswan.org>, Tobias Brunner
	<tobias@...ongswan.org>, Antony Antony <antony@...nome.org>, Tuomo Soini
	<tis@...bar.fi>, "David S. Miller" <davem@...emloft.net>
CC: <netdev@...r.kernel.org>, <devel@...ux-ipsec.org>
Subject: [PATCH RFC ipsec-next] pfkey: Deprecate pfkey

The pfkey user configuration interface was replaced by the netlink
user configuration interface more than a decade ago. In between
all maintained IKE implementations moved to the netlink interface.
So let 'config NET_KEY' default to no in Kconfig. The pfkey code
will be removed in a second step.

Signed-off-by: Steffen Klassert <steffen.klassert@...unet.com>
---
 net/xfrm/Kconfig | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/net/xfrm/Kconfig b/net/xfrm/Kconfig
index f0157702718f..aedea7a892db 100644
--- a/net/xfrm/Kconfig
+++ b/net/xfrm/Kconfig
@@ -110,14 +110,17 @@ config XFRM_IPCOMP
 	select CRYPTO_DEFLATE
 
 config NET_KEY
-	tristate "PF_KEY sockets"
+	tristate "PF_KEY sockets (deprecated)"
 	select XFRM_ALGO
+	default n
 	help
 	  PF_KEYv2 socket family, compatible to KAME ones.
-	  They are required if you are going to use IPsec tools ported
-	  from KAME.
 
-	  Say Y unless you know what you are doing.
+	  The PF_KEYv2 socket interface is deprecated and
+	  scheduled for removal. Please use the netlink
+	  interface (XFRM_USER) to configure IPsec.
+
+	  If unsure, say N.
 
 config NET_KEY_MIGRATE
 	bool "PF_KEY MIGRATE"
-- 
2.43.0