From: Jakub Kicinski <kuba@kernel.org>
Date: Wed, 12 Jun 2024 21:34:02 +0000 (-0700)
Subject: Merge branch 'net-flow-dissector-allow-explicit-passing-of-netns'
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=d2675fe95fc7e880aecad2d08626131527e084a6;p=users%2Fjedix%2Flinux-maple.git

Merge branch 'net-flow-dissector-allow-explicit-passing-of-netns'

Florian Westphal says:

====================
net: flow dissector: allow explicit passing of netns

Change since last version:
 fix kdoc comment warning reported by kbuild robot, no other changes,
 thus retaining RvB tags from Eric and Willem.
 v1: https://lore.kernel.org/netdev/20240607083205.3000-1-fw@strlen.de/

Years ago flow dissector gained ability to delegate flow dissection
to a bpf program, scoped per netns.

The netns is derived from skb->dev, and if that is not available, from
skb->sk.  If neither is set, we hit a (benign) WARN_ON_ONCE().

This WARN_ON_ONCE can be triggered from netfilter.
Known skb origins are nf_send_reset and ipv4 stack generated IGMP
messages.

Lets allow callers to pass the current netns explicitly and make
nf_tables use those instead.

This targets net-next instead of net because the WARN is benign and this
is not a regression.
====================

Link: https://lore.kernel.org/r/20240608221057.16070-1-fw@strlen.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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d2675fe95fc7e880aecad2d08626131527e084a6