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From: Larysa Zaremba <larysa.zaremba@intel.com>
To: bpf@vger.kernel.org
Cc: Larysa Zaremba <larysa.zaremba@intel.com>,
	Stanislav Fomichev <sdf@google.com>,
	Alexei Starovoitov <ast@kernel.org>,
	Daniel Borkmann <daniel@iogearbox.net>,
	Andrii Nakryiko <andrii@kernel.org>,
	Jakub Kicinski <kuba@kernel.org>,
	Martin KaFai Lau <martin.lau@linux.dev>,
	Song Liu <song@kernel.org>, Yonghong Song <yhs@fb.com>,
	John Fastabend <john.fastabend@gmail.com>,
	KP Singh <kpsingh@kernel.org>, Jiri Olsa <jolsa@kernel.org>,
	Jesse Brandeburg <jesse.brandeburg@intel.com>,
	Tony Nguyen <anthony.l.nguyen@intel.com>,
	Anatoly Burakov <anatoly.burakov@intel.com>,
	Jesper Dangaard Brouer <brouer@redhat.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,
	intel-wired-lan@lists.osuosl.org, linux-kernel@vger.kernel.org
Subject: [xdp-hints] [PATCH 11/15] xdp: Add checksum level hint
Date: Fri, 12 May 2023 17:16:35 +0200	[thread overview]
Message-ID: <20230512151639.992033-12-larysa.zaremba@intel.com> (raw)
In-Reply-To: <20230512151639.992033-1-larysa.zaremba@intel.com>

Implement functionality that enables drivers to expose to XDP code,
whether checksums was checked and on what level.

Signed-off-by: Larysa Zaremba <larysa.zaremba@intel.com>
---
 Documentation/networking/xdp-rx-metadata.rst |  3 +++
 include/linux/netdevice.h                    |  1 +
 include/net/xdp.h                            |  2 ++
 kernel/bpf/offload.c                         |  2 ++
 net/core/xdp.c                               | 12 ++++++++++++
 5 files changed, 20 insertions(+)

diff --git a/Documentation/networking/xdp-rx-metadata.rst b/Documentation/networking/xdp-rx-metadata.rst
index 73a78029c596..f74f0e283097 100644
--- a/Documentation/networking/xdp-rx-metadata.rst
+++ b/Documentation/networking/xdp-rx-metadata.rst
@@ -29,6 +29,9 @@ metadata is supported, this set will grow:
 .. kernel-doc:: net/core/xdp.c
    :identifiers: bpf_xdp_metadata_rx_stag
 
+.. kernel-doc:: net/core/xdp.c
+   :identifiers: bpf_xdp_metadata_rx_csum_lvl
+
 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
 consumers, an XDP program can store it into the metadata area carried
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index fdae37fe11f5..ddade3a15366 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -1657,6 +1657,7 @@ struct xdp_metadata_ops {
 			       enum xdp_rss_hash_type *rss_type);
 	int	(*xmo_rx_ctag)(const struct xdp_md *ctx, u16 *vlan_tag);
 	int	(*xmo_rx_stag)(const struct xdp_md *ctx, u16 *vlan_tag);
+	int	(*xmo_rx_csum_lvl)(const struct xdp_md *ctx, u8 *csum_level);
 };
 
 /**
diff --git a/include/net/xdp.h b/include/net/xdp.h
index 2db7439fc60f..0fbd25616241 100644
--- a/include/net/xdp.h
+++ b/include/net/xdp.h
@@ -393,6 +393,8 @@ void xdp_attachment_setup(struct xdp_attachment_info *info,
 			   bpf_xdp_metadata_rx_ctag) \
 	XDP_METADATA_KFUNC(XDP_METADATA_KFUNC_RX_STAG, \
 			   bpf_xdp_metadata_rx_stag) \
+	XDP_METADATA_KFUNC(XDP_METADATA_KFUNC_RX_CSUM_LVL, \
+			   bpf_xdp_metadata_rx_csum_lvl) \
 
 enum {
 #define XDP_METADATA_KFUNC(name, _) name,
diff --git a/kernel/bpf/offload.c b/kernel/bpf/offload.c
index 2c6b6e82cfac..8bd54fb4ac63 100644
--- a/kernel/bpf/offload.c
+++ b/kernel/bpf/offload.c
@@ -852,6 +852,8 @@ void *bpf_dev_bound_resolve_kfunc(struct bpf_prog *prog, u32 func_id)
 		p = ops->xmo_rx_ctag;
 	else if (func_id == bpf_xdp_metadata_kfunc_id(XDP_METADATA_KFUNC_RX_STAG))
 		p = ops->xmo_rx_stag;
+	else if (func_id == bpf_xdp_metadata_kfunc_id(XDP_METADATA_KFUNC_RX_CSUM_LVL))
+		p = ops->xmo_rx_csum_lvl;
 out:
 	up_read(&bpf_devs_lock);
 
diff --git a/net/core/xdp.c b/net/core/xdp.c
index eff21501609f..7dd45fd62983 100644
--- a/net/core/xdp.c
+++ b/net/core/xdp.c
@@ -762,6 +762,18 @@ __bpf_kfunc int bpf_xdp_metadata_rx_stag(const struct xdp_md *ctx, u16 *vlan_tag
 	return -EOPNOTSUPP;
 }
 
+/**
+ * bpf_xdp_metadata_rx_csum_lvl - Get depth at which HW has checked the checksum.
+ * @ctx: XDP context pointer.
+ * @csum_level: Return value pointer.
+ *
+ * Returns 0 on success (HW has checked the checksum) or ``-errno`` on error.
+ */
+__bpf_kfunc int bpf_xdp_metadata_rx_csum_lvl(const struct xdp_md *ctx, u8 *csum_level)
+{
+	return -EOPNOTSUPP;
+}
+
 __diag_pop();
 
 BTF_SET8_START(xdp_metadata_kfunc_ids)
-- 
2.35.3


  parent reply	other threads:[~2023-05-12 15:21 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-05-12 15:16 [xdp-hints] [PATCH bpf-next 00/15] new kfunc XDP hints and ice implementation Larysa Zaremba
2023-05-12 15:16 ` [xdp-hints] [PATCH 01/15] ice: make RX hash reading code more reusable Larysa Zaremba
2023-05-12 15:16 ` [xdp-hints] [PATCH 02/15] ice: make RX HW timestamp " Larysa Zaremba
2023-05-12 15:16 ` [xdp-hints] [PATCH 03/15] ice: make RX checksum checking " Larysa Zaremba
2023-05-12 15:16 ` [xdp-hints] [PATCH 04/15] ice: Make ptype internal to descriptor info processing Larysa Zaremba
2023-05-12 15:16 ` [xdp-hints] [PATCH 05/15] ice: Introduce ice_xdp_buff Larysa Zaremba
2023-05-12 15:16 ` [xdp-hints] [PATCH 06/15] ice: Support HW timestamp hint Larysa Zaremba
2023-05-12 15:16 ` [xdp-hints] [PATCH 07/15] ice: Support RX hash XDP hint Larysa Zaremba
2023-05-12 15:16 ` [xdp-hints] [PATCH 08/15] ice: Support XDP hints in AF_XDP ZC mode Larysa Zaremba
2023-05-12 15:16 ` [xdp-hints] [PATCH 09/15] xdp: Add VLAN tag hint Larysa Zaremba
2023-05-12 15:16 ` [xdp-hints] [PATCH 10/15] ice: Implement " Larysa Zaremba
2023-05-12 15:16 ` Larysa Zaremba [this message]
2023-05-12 15:16 ` [xdp-hints] [PATCH 12/15] ice: Implement checksum level hint Larysa Zaremba
2023-05-12 15:16 ` [xdp-hints] [PATCH 13/15] selftests/bpf: Allow VLAN packets in xdp_hw_metadata Larysa Zaremba
2023-05-12 15:16 ` [xdp-hints] [PATCH 14/15] net, xdp: allow metadata > 32 Larysa Zaremba
2023-05-12 15:16 ` [xdp-hints] [PATCH 15/15] selftests/bpf: Add flags and new hints to xdp_hw_metadata Larysa Zaremba

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