Introduce the capability to dump HW rx checksum in xdp_hw_metadat program via bpf_xdp_metadata_rx_checksum() kfunc.
Signed-off-by: Lorenzo Bianconi <[email protected]> --- .../testing/selftests/bpf/progs/xdp_hw_metadata.c | 7 ++++++ tools/testing/selftests/bpf/xdp_hw_metadata.c | 28 ++++++++++++++++++++++ tools/testing/selftests/bpf/xdp_metadata.h | 10 +++++--- 3 files changed, 42 insertions(+), 3 deletions(-) diff --git a/tools/testing/selftests/bpf/progs/xdp_hw_metadata.c b/tools/testing/selftests/bpf/progs/xdp_hw_metadata.c index 330ece2eabdb454da2bb2cbd297d2b2dd6efddc0..dc62d572e3ac6e2ef173b330da515757ea543415 100644 --- a/tools/testing/selftests/bpf/progs/xdp_hw_metadata.c +++ b/tools/testing/selftests/bpf/progs/xdp_hw_metadata.c @@ -110,6 +110,13 @@ int rx(struct xdp_md *ctx) else meta->hint_valid |= XDP_META_FIELD_VLAN_TAG; + err = bpf_xdp_metadata_rx_checksum(ctx, &meta->ip_summed, + &meta->cksum_meta); + if (err) + meta->rx_cksum_err = err; + else + meta->hint_valid |= XDP_META_FIELD_CHECKSUM; + __sync_add_and_fetch(&pkts_redir, 1); return bpf_redirect_map(&xsk, ctx->rx_queue_index, XDP_PASS); } diff --git a/tools/testing/selftests/bpf/xdp_hw_metadata.c b/tools/testing/selftests/bpf/xdp_hw_metadata.c index 3d8de0d4c96a7afdf5f60b2fdff73c22b876ce54..5f4bd63b8a31586353e58e4f6472ee8ac9531a06 100644 --- a/tools/testing/selftests/bpf/xdp_hw_metadata.c +++ b/tools/testing/selftests/bpf/xdp_hw_metadata.c @@ -8,6 +8,7 @@ * - Metadata verified: * - rx_timestamp * - rx_hash + * - rx_checksum * * TX: * - UDP 9091 packets trigger TX reply @@ -219,6 +220,28 @@ static void print_vlan_tci(__u16 tag) printf("PCP=%u, DEI=%d, VID=0x%X\n", pcp, dei, vlan_id); } +static void print_rx_cksum(__u8 ip_summed, __u32 cksum_meta) +{ + const char *cksum = "CHECKSUM_NONE"; + + switch (ip_summed) { + case XDP_CHECKSUM_UNNECESSARY: + cksum = "CHECKSUM_UNNECESSARY"; + break; + case XDP_CHECKSUM_COMPLETE: + cksum = "CHECKSUM_COMPLETE"; + break; + case XDP_CHECKSUM_PARTIAL: + cksum = "CHECKSUM_PARTIAL"; + break; + case XDP_CHECKSUM_NONE: + default: + break; + } + + printf("rx-cksum: %s, csum_meta=0x%x\n", cksum, cksum_meta); +} + static void verify_xdp_metadata(void *data, clockid_t clock_id) { struct xdp_meta *meta; @@ -254,6 +277,11 @@ static void verify_xdp_metadata(void *data, clockid_t clock_id) printf("No rx_vlan_tci or rx_vlan_proto, err=%d\n", meta->rx_vlan_tag_err); } + + if (meta->hint_valid & XDP_META_FIELD_CHECKSUM) + print_rx_cksum(meta->ip_summed, meta->cksum_meta); + else + printf("No rx_chsum, err=%d\n", meta->rx_cksum_err); } static void verify_skb_metadata(int fd) diff --git a/tools/testing/selftests/bpf/xdp_metadata.h b/tools/testing/selftests/bpf/xdp_metadata.h index a16f71488a34e6df23fec6dd7dde7b7989774618..b7ab112da8032405ec0e3d699499f4a9c5cb91dc 100644 --- a/tools/testing/selftests/bpf/xdp_metadata.h +++ b/tools/testing/selftests/bpf/xdp_metadata.h @@ -28,6 +28,7 @@ enum xdp_meta_field { XDP_META_FIELD_TS = BIT(0), XDP_META_FIELD_RSS = BIT(1), XDP_META_FIELD_VLAN_TAG = BIT(2), + XDP_META_FIELD_CHECKSUM = BIT(3), }; #define XDP_CHECKSUM_NONE 0 @@ -53,9 +54,12 @@ struct xdp_meta { }; __s32 rx_vlan_tag_err; }; - struct { - __u8 ip_summed; - __u32 cksum_meta; + union { + struct { + __u8 ip_summed; + __u32 cksum_meta; + }; + __s32 rx_cksum_err; }; enum xdp_meta_field hint_valid; }; -- 2.53.0
