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From: Jakub Kicinski <kuba@kernel.org>
To: Jesper Dangaard Brouer <hawk@kernel.org>
Cc: Lorenzo Bianconi <lorenzo@kernel.org>,
	Donald Hunter <donald.hunter@gmail.com>,
	"David S. Miller" <davem@davemloft.net>,
	Eric Dumazet <edumazet@google.com>,
	Paolo Abeni <pabeni@redhat.com>, Simon Horman <horms@kernel.org>,
	Alexei Starovoitov <ast@kernel.org>,
	Daniel Borkmann <daniel@iogearbox.net>,
	John Fastabend <john.fastabend@gmail.com>,
	Stanislav Fomichev <sdf@fomichev.me>,
	Andrew Lunn <andrew+netdev@lunn.ch>,
	Tony Nguyen <anthony.l.nguyen@intel.com>,
	Przemek Kitszel <przemyslaw.kitszel@intel.com>,
	Alexander Lobakin <aleksander.lobakin@intel.com>,
	Andrii Nakryiko <andrii@kernel.org>,
	Martin KaFai Lau <martin.lau@linux.dev>,
	Eduard Zingerman <eddyz87@gmail.com>, Song Liu <song@kernel.org>,
	Yonghong Song <yonghong.song@linux.dev>,
	KP Singh <kpsingh@kernel.org>, Hao Luo <haoluo@google.com>,
	Jiri Olsa <jolsa@kernel.org>, Shuah Khan <shuah@kernel.org>,
	Maciej Fijalkowski <maciej.fijalkowski@intel.com>,
	netdev@vger.kernel.org, bpf@vger.kernel.org,
	intel-wired-lan@lists.osuosl.org,
	linux-kselftest@vger.kernel.org
Subject: Re: [PATCH RFC bpf-next v2 1/5] netlink: specs: Add XDP RX checksum capability to XDP metadata specs
Date: Fri, 26 Sep 2025 17:35:39 -0700	[thread overview]
Message-ID: <20250926173539.17403e94@kernel.org> (raw)
In-Reply-To: <0608935c-1c1c-4374-a058-bc78d114c630@kernel.org>

On Fri, 26 Sep 2025 11:53:25 +0200 Jesper Dangaard Brouer wrote:
> > + * In case of success, ``cksum_meta`` contains the hw computed checksum value
> > + * for ``XDP_CHECKSUM_COMPLETE`` or the ``csum_level`` for
> > + * ``XDP_CHECKSUM_UNNECESSARY``. It is set to 0 for ``XDP_CHECKSUM_NONE`` and
> > + * ``XDP_CHECKSUM_PARTIAL``.
> > + *  
> 
> It is very important that we explain the meaning of XDP_CHECKSUM_NONE.
> As I hinted in other email, this also covers the non-existing FAIL case.

Good idea, perhaps we should add this to the big comment about
checksums in skbuff.h and point to that? Avoid the duplication?

  reply	other threads:[~2025-09-27  0:35 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-09-25  9:30 [PATCH RFC bpf-next v2 0/5] Add the the capability to load HW RX checsum in eBPF programs Lorenzo Bianconi
2025-09-25  9:30 ` [PATCH RFC bpf-next v2 1/5] netlink: specs: Add XDP RX checksum capability to XDP metadata specs Lorenzo Bianconi
2025-09-26  4:20   ` Stanislav Fomichev
2025-09-26  8:59     ` Jesper Dangaard Brouer
2025-09-26 22:53       ` Stanislav Fomichev
2025-09-26  9:53   ` Jesper Dangaard Brouer
2025-09-27  0:35     ` Jakub Kicinski [this message]
2025-09-27  0:41     ` Jakub Kicinski
2025-09-25  9:30 ` [PATCH RFC bpf-next v2 2/5] net: veth: Add xmo_rx_checksum callback to veth driver Lorenzo Bianconi
2025-09-25  9:30 ` [PATCH RFC bpf-next v2 3/5] net: ice: Add xmo_rx_checksum callback Lorenzo Bianconi
2025-09-25  9:30 ` [PATCH RFC bpf-next v2 4/5] selftests/bpf: Add selftest support for bpf_xdp_metadata_rx_checksum Lorenzo Bianconi
2025-09-25  9:30 ` [PATCH RFC bpf-next v2 5/5] selftests/bpf: Add bpf_xdp_metadata_rx_checksum support to xdp_hw_metadat prog Lorenzo Bianconi
2025-09-25  9:51 ` [PATCH RFC bpf-next v2 0/5] Add the the capability to load HW RX checsum in eBPF programs Jakub Sitnicki
2025-09-25 10:39   ` Lorenzo Bianconi
2025-09-25 10:58     ` Jakub Sitnicki
2025-09-26 11:45       ` Jesper Dangaard Brouer
2025-09-26 11:58         ` Jakub Sitnicki
2025-09-26 12:55           ` Lorenzo Bianconi

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