netdev - [PATCH nf-next 0/5] netfilter: Prepare netfilter to future .flowi4

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Message-ID: <cover.1731599482.git.gnault@redhat.com>
Date: Thu, 14 Nov 2024 17:03:16 +0100
From: Guillaume Nault <gnault@...hat.com>
To: Pablo Neira Ayuso <pablo@...filter.org>,
	Jozsef Kadlecsik <kadlec@...filter.org>
Cc: netfilter-devel@...r.kernel.org,
	"David S. Miller" <davem@...emloft.net>,
	David Ahern <dsahern@...nel.org>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Simon Horman <horms@...nel.org>, coreteam@...filter.org,
	netdev@...r.kernel.org, Ido Schimmel <idosch@...dia.com>
Subject: [PATCH nf-next 0/5] netfilter: Prepare netfilter to future
 .flowi4_tos conversion.

There are multiple occasions where Netfilter code needs to perform
route lookups and initialise struct flowi4. As we're in the process of
converting the .flowi4_tos field to dscp_t, we need to convert the
users so that they have a dscp_t value at hand, rather than a __u8.

All netfilter users get the DSCP (TOS) value from IPv4 packet headers.
So we just need to use the new ip4h_dscp() helper to get a dscp_t
variable.

Converting .flowi4_tos to dscp_t will allow to detect regressions where
ECN bits are mistakenly treated as DSCP when doing route lookups.

Guillaume Nault (5):
  netfilter: ipv4: Convert ip_route_me_harder() to dscp_t.
  netfilter: flow_offload: Convert nft_flow_route() to dscp_t.
  netfilter: rpfilter: Convert rpfilter_mt() to dscp_t.
  netfilter: nft_fib: Convert nft_fib4_eval() to dscp_t.
  netfilter: nf_dup4: Convert nf_dup_ipv4_route() to dscp_t.

 net/ipv4/netfilter.c              | 2 +-
 net/ipv4/netfilter/ipt_rpfilter.c | 2 +-
 net/ipv4/netfilter/nf_dup_ipv4.c  | 2 +-
 net/ipv4/netfilter/nft_fib_ipv4.c | 3 ++-
 net/netfilter/nft_flow_offload.c  | 4 ++--
 5 files changed, 7 insertions(+), 6 deletions(-)

-- 
2.39.2