[PATCH bpf-next v3 4/5] selftests/bpf: Add selftest support for bpf_xdp_metadata_rx_checksum
From: Lorenzo Bianconi <lorenzo@kernel.org>
Date: 2026-02-17 08:34:44
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
Introduce support to xdp_metadata selftest for bpf_xdp_metadata_rx_checksum kfunc. Reviewed-by: Aleksandr Loktionov <redacted> Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org> --- tools/testing/selftests/bpf/prog_tests/xdp_metadata.c | 6 ++++++ tools/testing/selftests/bpf/progs/xdp_metadata.c | 3 +++ tools/testing/selftests/bpf/xdp_metadata.h | 8 ++++++++ 3 files changed, 17 insertions(+)
diff --git a/tools/testing/selftests/bpf/prog_tests/xdp_metadata.c b/tools/testing/selftests/bpf/prog_tests/xdp_metadata.c
index 19f92affc2daa23fdd869554e7a0475b86350a4f..31f3629eb0681be656fa0af74fc0d419a3d135fc 100644
--- a/tools/testing/selftests/bpf/prog_tests/xdp_metadata.c
+++ b/tools/testing/selftests/bpf/prog_tests/xdp_metadata.c@@ -310,6 +310,12 @@ 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_meta, 0, "rx_cksum_meta")) + 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 09bb8a038d528cf26c5b314cc927915ac2796bf0..72f69c5c659592cca1f04a512868f2101aa2e962 100644
--- a/tools/testing/selftests/bpf/progs/xdp_metadata.c
+++ b/tools/testing/selftests/bpf/progs/xdp_metadata.c@@ -98,6 +98,9 @@ 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, + (enum xdp_checksum *)&meta->ip_summed, + &meta->cksum_meta); 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 87318ad1117a1d677af121f11778178532e2a562..837cd1efe6b5aebd0f62bae4c49d5bfd77db64bc 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 0 +#define XDP_CHECKSUM_UNNECESSARY 1 +#define XDP_CHECKSUM_COMPLETE 2 + struct xdp_meta { union { __u64 rx_timestamp;
@@ -48,5 +52,9 @@ struct xdp_meta { }; __s32 rx_vlan_tag_err; }; + struct { + __u8 ip_summed; + __u32 cksum_meta; + }; enum xdp_meta_field hint_valid; };
--
2.53.0