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From: Larysa Zaremba <larysa.zaremba@intel.com>
To: Alexander Lobakin <aleksander.lobakin@intel.com>
Cc: bpf@vger.kernel.org, ast@kernel.org, daniel@iogearbox.net,
	andrii@kernel.org, martin.lau@linux.dev, song@kernel.org,
	yhs@fb.com, john.fastabend@gmail.com, kpsingh@kernel.org,
	sdf@google.com, haoluo@google.com, jolsa@kernel.org,
	David Ahern <dsahern@gmail.com>, Jakub Kicinski <kuba@kernel.org>,
	Willem de Bruijn <willemb@google.com>,
	Jesper Dangaard Brouer <brouer@redhat.com>,
	Anatoly Burakov <anatoly.burakov@intel.com>,
	Alexander Lobakin <alexandr.lobakin@intel.com>,
	Magnus Karlsson <magnus.karlsson@gmail.com>,
	Maryam Tahhan <mtahhan@redhat.com>,
	xdp-hints@xdp-project.net, netdev@vger.kernel.org,
	Willem de Bruijn <willemdebruijn.kernel@gmail.com>,
	Alexei Starovoitov <alexei.starovoitov@gmail.com>,
	Simon Horman <simon.horman@corigine.com>,
	Tariq Toukan <tariqt@mellanox.com>,
	Saeed Mahameed <saeedm@mellanox.com>
Subject: [xdp-hints] Re: [RFC bpf-next 09/23] xdp: Add VLAN tag hint
Date: Thu, 14 Sep 2023 18:21:16 +0200	[thread overview]
Message-ID: <ZQMy/FEgxaLsRb8n@lincoln> (raw)
In-Reply-To: <2c1f16fe-df92-08bc-e24f-a95edb2eadd0@intel.com>

On Thu, Sep 14, 2023 at 06:18:40PM +0200, Alexander Lobakin wrote:
> From: Larysa Zaremba <larysa.zaremba@intel.com>
> Date: Thu, 24 Aug 2023 21:26:48 +0200
> 
> > Implement functionality that enables drivers to expose VLAN tag
> > to XDP code.
> 
> I'd leave a couple more words here. Mention that it exports both tag and
> protocol, for example. That TCI is host-Endian and proto is BE (just
> like how skb stores them and it's fine).
>

OK

> > 
> > Signed-off-by: Larysa Zaremba <larysa.zaremba@intel.com>
> > ---
> >  Documentation/networking/xdp-rx-metadata.rst |  8 ++++-
> >  include/net/xdp.h                            |  4 +++
> >  kernel/bpf/offload.c                         |  2 ++
> >  net/core/xdp.c                               | 34 ++++++++++++++++++++
> >  4 files changed, 47 insertions(+), 1 deletion(-)
> > 
> > diff --git a/Documentation/networking/xdp-rx-metadata.rst b/Documentation/networking/xdp-rx-metadata.rst
> > index 25ce72af81c2..ea6dd79a21d3 100644
> > --- a/Documentation/networking/xdp-rx-metadata.rst
> > +++ b/Documentation/networking/xdp-rx-metadata.rst
> > @@ -18,7 +18,13 @@ Currently, the following kfuncs are supported. In the future, as more
> >  metadata is supported, this set will grow:
> >  
> >  .. kernel-doc:: net/core/xdp.c
> > -   :identifiers: bpf_xdp_metadata_rx_timestamp bpf_xdp_metadata_rx_hash
> > +   :identifiers: bpf_xdp_metadata_rx_timestamp
> > +
> > +.. kernel-doc:: net/core/xdp.c
> > +   :identifiers: bpf_xdp_metadata_rx_hash
> > +
> > +.. kernel-doc:: net/core/xdp.c
> > +   :identifiers: bpf_xdp_metadata_rx_vlan_tag
> >  
> >  An XDP program can use these kfuncs to read the metadata into stack
> >  variables for its own consumption. Or, to pass the metadata on to other
> > diff --git a/include/net/xdp.h b/include/net/xdp.h
> > index 1e9870d5f025..8bb64fc76498 100644
> > --- a/include/net/xdp.h
> > +++ b/include/net/xdp.h
> > @@ -388,6 +388,8 @@ void xdp_attachment_setup(struct xdp_attachment_info *info,
> >  			   bpf_xdp_metadata_rx_timestamp) \
> >  	XDP_METADATA_KFUNC(XDP_METADATA_KFUNC_RX_HASH, \
> >  			   bpf_xdp_metadata_rx_hash) \
> > +	XDP_METADATA_KFUNC(XDP_METADATA_KFUNC_RX_VLAN_TAG, \
> > +			   bpf_xdp_metadata_rx_vlan_tag) \
> >  
> >  enum {
> >  #define XDP_METADATA_KFUNC(name, _) name,
> > @@ -449,6 +451,8 @@ struct xdp_metadata_ops {
> >  	int	(*xmo_rx_timestamp)(const struct xdp_md *ctx, u64 *timestamp);
> >  	int	(*xmo_rx_hash)(const struct xdp_md *ctx, u32 *hash,
> >  			       enum xdp_rss_hash_type *rss_type);
> > +	int	(*xmo_rx_vlan_tag)(const struct xdp_md *ctx, u16 *vlan_tci,
> > +				   __be16 *vlan_proto);
> 
> Was "TCI first, proto second" aligned with something or I can ask "why
> not proto first, TCI second"?

No particular reason. Now I have looked it up and this is the other way in all 
places >_<. I do probably need to switch this. Time to put my regular expressions 
skills to the test.

> 
> >  };
> >  
> >  #ifdef CONFIG_NET
> 
> [...]
> 
> Thanks,
> Olek

  reply	other threads:[~2023-09-14 16:30 UTC|newest]

Thread overview: 70+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-08-24 19:26 [xdp-hints] [RFC bpf-next 00/23] XDP metadata via kfuncs for ice + mlx5 Larysa Zaremba
2023-08-24 19:26 ` [xdp-hints] [RFC bpf-next 01/23] ice: make RX hash reading code more reusable Larysa Zaremba
2023-09-04 14:37   ` [xdp-hints] " Maciej Fijalkowski
2023-09-06 12:23     ` Alexander Lobakin
2023-09-14 16:12   ` Alexander Lobakin
2023-09-14 16:15     ` Larysa Zaremba
2023-08-24 19:26 ` [xdp-hints] [RFC bpf-next 02/23] ice: make RX HW timestamp " Larysa Zaremba
2023-09-04 14:56   ` [xdp-hints] " Maciej Fijalkowski
2023-09-04 16:29     ` Larysa Zaremba
2023-09-05 15:22       ` Maciej Fijalkowski
2023-08-24 19:26 ` [xdp-hints] [RFC bpf-next 03/23] ice: make RX checksum checking " Larysa Zaremba
2023-09-04 15:02   ` [xdp-hints] " Maciej Fijalkowski
2023-09-04 18:01     ` Larysa Zaremba
2023-09-05 15:37       ` Maciej Fijalkowski
2023-09-05 16:53         ` Larysa Zaremba
2023-09-05 17:44           ` Maciej Fijalkowski
2023-09-06  9:28             ` Larysa Zaremba
2023-08-24 19:26 ` [xdp-hints] [RFC bpf-next 04/23] ice: Make ptype internal to descriptor info processing Larysa Zaremba
2023-09-04 15:04   ` [xdp-hints] " Maciej Fijalkowski
2023-08-24 19:26 ` [xdp-hints] [RFC bpf-next 05/23] ice: Introduce ice_xdp_buff Larysa Zaremba
2023-09-04 15:32   ` [xdp-hints] " Maciej Fijalkowski
2023-09-04 18:11     ` Larysa Zaremba
2023-09-05 17:53       ` Maciej Fijalkowski
2023-09-07 14:21         ` Larysa Zaremba
2023-09-07 16:33           ` Stanislav Fomichev
2023-09-07 16:42             ` Maciej Fijalkowski
2023-09-07 16:43               ` Maciej Fijalkowski
2023-09-13 15:40                 ` Larysa Zaremba
2023-08-24 19:26 ` [xdp-hints] [RFC bpf-next 06/23] ice: Support HW timestamp hint Larysa Zaremba
2023-09-04 15:38   ` [xdp-hints] " Maciej Fijalkowski
2023-09-04 18:12     ` Larysa Zaremba
2023-08-24 19:26 ` [xdp-hints] [RFC bpf-next 07/23] ice: Support RX hash XDP hint Larysa Zaremba
2023-09-05 15:42   ` [xdp-hints] " Maciej Fijalkowski
2023-09-05 17:09     ` Larysa Zaremba
2023-09-06 12:03     ` Alexander Lobakin
2023-09-14 16:54   ` Alexander Lobakin
2023-09-14 16:59     ` Larysa Zaremba
2023-08-24 19:26 ` [xdp-hints] [RFC bpf-next 08/23] ice: Support XDP hints in AF_XDP ZC mode Larysa Zaremba
2023-09-04 15:42   ` [xdp-hints] " Maciej Fijalkowski
2023-09-04 18:14     ` Larysa Zaremba
2023-08-24 19:26 ` [xdp-hints] [RFC bpf-next 09/23] xdp: Add VLAN tag hint Larysa Zaremba
2023-09-14 16:18   ` [xdp-hints] " Alexander Lobakin
2023-09-14 16:21     ` Larysa Zaremba [this message]
2023-08-24 19:26 ` [xdp-hints] [RFC bpf-next 10/23] ice: Implement " Larysa Zaremba
2023-09-04 16:00   ` [xdp-hints] " Maciej Fijalkowski
2023-09-04 18:18     ` Larysa Zaremba
2023-09-14 16:25   ` Alexander Lobakin
2023-09-14 16:28     ` Larysa Zaremba
2023-09-14 16:38       ` Alexander Lobakin
2023-09-14 17:02         ` Larysa Zaremba
2023-09-18 14:07         ` Larysa Zaremba
2023-08-24 19:26 ` [xdp-hints] [RFC bpf-next 11/23] ice: use VLAN proto from ring packet context in skb path Larysa Zaremba
2023-09-14 16:30   ` [xdp-hints] " Alexander Lobakin
2023-09-14 16:30     ` Larysa Zaremba
2023-08-24 19:26 ` [xdp-hints] [RFC bpf-next 12/23] xdp: Add checksum hint Larysa Zaremba
2023-09-14 16:34   ` [xdp-hints] " Alexander Lobakin
2023-08-24 19:26 ` [xdp-hints] [RFC bpf-next 13/23] ice: Implement " Larysa Zaremba
2023-08-24 19:26 ` [xdp-hints] [RFC bpf-next 14/23] selftests/bpf: Allow VLAN packets in xdp_hw_metadata Larysa Zaremba
2023-08-24 19:26 ` [xdp-hints] [RFC bpf-next 15/23] net, xdp: allow metadata > 32 Larysa Zaremba
2023-08-24 19:26 ` [xdp-hints] [RFC bpf-next 16/23] selftests/bpf: Add flags and new hints to xdp_hw_metadata Larysa Zaremba
2023-08-24 19:26 ` [xdp-hints] [RFC bpf-next 17/23] veth: Implement VLAN tag and checksum XDP hint Larysa Zaremba
2023-08-24 19:26 ` [xdp-hints] [RFC bpf-next 18/23] net: make vlan_get_tag() return -ENODATA instead of -EINVAL Larysa Zaremba
2023-08-24 19:26 ` [xdp-hints] [RFC bpf-next 19/23] selftests/bpf: Use AF_INET for TX in xdp_metadata Larysa Zaremba
2023-08-24 19:26 ` [xdp-hints] [RFC bpf-next 20/23] selftests/bpf: Check VLAN tag and proto " Larysa Zaremba
2023-08-24 19:27 ` [xdp-hints] [RFC bpf-next 21/23] selftests/bpf: check checksum state " Larysa Zaremba
2023-08-24 19:27 ` [xdp-hints] [RFC bpf-next 22/23] mlx5: implement VLAN tag XDP hint Larysa Zaremba
2023-08-24 19:27 ` [xdp-hints] [RFC bpf-next 23/23] mlx5: implement RX checksum " Larysa Zaremba
2023-08-31 14:50 ` [xdp-hints] Re: [RFC bpf-next 00/23] XDP metadata via kfuncs for ice + mlx5 Larysa Zaremba
2023-09-04 16:06 ` Maciej Fijalkowski
2023-09-06 14:09   ` Larysa Zaremba

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