[PATCH bpf-next v4 4/6] selftests/bpf: Add selftest support for bpf_xdp_metadata_rx_checksum
From: Vladimir Vdovin <hidden>
Date: 2026-07-08 20:35:12
Also in:
bpf, intel-wired-lan, linux-kselftest
Subsystem:
bpf [general] (safe dynamic programs and tools), bpf [selftests] (test runners & infrastructure), kernel selftest framework, the rest, xdp (express data path) · Maintainers:
Alexei Starovoitov, Daniel Borkmann, Andrii Nakryiko, Eduard Zingerman, Kumar Kartikeya Dwivedi, Shuah Khan, Linus Torvalds, David S. Miller, Jakub Kicinski, Jesper Dangaard Brouer, John Fastabend
From: Lorenzo Bianconi <lorenzo@kernel.org> Introduce dedicated selftest for bpf_xdp_metadata_rx_checksum kfunc to bpf selftest framework. Reviewed-by: Aleksandr Loktionov <redacted> Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org> Signed-off-by: Vladimir Vdovin <redacted> --- tools/testing/selftests/bpf/prog_tests/xdp_metadata.c | 9 +++++++++ tools/testing/selftests/bpf/progs/xdp_metadata.c | 2 ++ tools/testing/selftests/bpf/xdp_metadata.h | 9 +++++++++ 3 files changed, 20 insertions(+)
diff --git a/tools/testing/selftests/bpf/prog_tests/xdp_metadata.c b/tools/testing/selftests/bpf/prog_tests/xdp_metadata.c
index 5c31054ad4a4..91de61c822f5 100644
--- a/tools/testing/selftests/bpf/prog_tests/xdp_metadata.c
+++ b/tools/testing/selftests/bpf/prog_tests/xdp_metadata.c@@ -310,6 +310,15 @@ static int verify_xsk_metadata(struct xsk *xsk, bool sent_from_af_xdp) if (!ASSERT_NEQ(meta->rx_hash, 0, "rx_hash")) return -1; + if (!ASSERT_EQ(meta->ip_summed, XDP_CHECKSUM_NONE, "rx_ip_summed")) + return -1; + + if (!ASSERT_EQ(meta->cksum, 0, "rx_cksum")) + return -1; + + if (!ASSERT_EQ(meta->cksum_level, 0, "rx_cksum_level")) + return -1; + if (!sent_from_af_xdp) { if (!ASSERT_NEQ(meta->rx_hash_type & XDP_RSS_TYPE_L4, 0, "rx_hash_type")) return -1;
diff --git a/tools/testing/selftests/bpf/progs/xdp_metadata.c b/tools/testing/selftests/bpf/progs/xdp_metadata.c
index 09bb8a038d52..af1e19d48d67 100644
--- a/tools/testing/selftests/bpf/progs/xdp_metadata.c
+++ b/tools/testing/selftests/bpf/progs/xdp_metadata.c@@ -98,6 +98,8 @@ int rx(struct xdp_md *ctx) bpf_xdp_metadata_rx_hash(ctx, &meta->rx_hash, &meta->rx_hash_type); bpf_xdp_metadata_rx_vlan_tag(ctx, &meta->rx_vlan_proto, &meta->rx_vlan_tci); + bpf_xdp_metadata_rx_checksum(ctx, &meta->ip_summed, &meta->cksum, + &meta->cksum_level); return bpf_redirect_map(&xsk, ctx->rx_queue_index, XDP_PASS); }
diff --git a/tools/testing/selftests/bpf/xdp_metadata.h b/tools/testing/selftests/bpf/xdp_metadata.h
index 87318ad1117a..bca09b94af26 100644
--- a/tools/testing/selftests/bpf/xdp_metadata.h
+++ b/tools/testing/selftests/bpf/xdp_metadata.h@@ -30,6 +30,10 @@ enum xdp_meta_field { XDP_META_FIELD_VLAN_TAG = BIT(2), }; +#define XDP_CHECKSUM_NONE BIT(0) +#define XDP_CHECKSUM_UNNECESSARY BIT(1) +#define XDP_CHECKSUM_COMPLETE BIT(2) + struct xdp_meta { union { __u64 rx_timestamp;
@@ -48,5 +52,10 @@ struct xdp_meta { }; __s32 rx_vlan_tag_err; }; + struct { + __u32 ip_summed; + __u32 cksum; + __u8 cksum_level; + }; enum xdp_meta_field hint_valid; };
--
2.47.0