On 07/03, Larysa Zaremba wrote:
> Verify, whether VLAN tag and proto are set correctly.
>
> To simulate "stripped" VLAN tag on veth, send test packet from VLAN
> interface.
>
> Signed-off-by: Larysa Zaremba <larysa.zaremba@xxxxxxxxx>
Acked-by: Stanislav Fomichev <sdf@xxxxxxxxxx>
> ---
> .../selftests/bpf/prog_tests/xdp_metadata.c | 21 +++++++++++++++++--
> .../selftests/bpf/progs/xdp_metadata.c | 4 ++++
> 2 files changed, 23 insertions(+), 2 deletions(-)
>
> diff --git a/tools/testing/selftests/bpf/prog_tests/xdp_metadata.c b/tools/testing/selftests/bpf/prog_tests/xdp_metadata.c
> index 53b32a641e8e..50ac9f570bc5 100644
> --- a/tools/testing/selftests/bpf/prog_tests/xdp_metadata.c
> +++ b/tools/testing/selftests/bpf/prog_tests/xdp_metadata.c
> @@ -38,6 +38,13 @@
> #define TX_MAC "00:00:00:00:00:01"
> #define RX_MAC "00:00:00:00:00:02"
>
> +#define VLAN_ID 59
> +#define VLAN_ID_STR "59"
> +#define VLAN_PROTO "802.1Q"
> +#define VLAN_PID htons(ETH_P_8021Q)
> +#define TX_NAME_VLAN TX_NAME "." VLAN_ID_STR
> +#define RX_NAME_VLAN RX_NAME "." VLAN_ID_STR
> +
> #define XDP_RSS_TYPE_L4 BIT(3)
>
> struct xsk {
> @@ -215,6 +222,12 @@ static int verify_xsk_metadata(struct xsk *xsk)
> if (!ASSERT_NEQ(meta->rx_hash_type & XDP_RSS_TYPE_L4, 0, "rx_hash_type"))
> return -1;
>
> + if (!ASSERT_EQ(meta->rx_vlan_tag, VLAN_ID, "rx_vlan_tag"))
> + return -1;
> +
> + if (!ASSERT_EQ(meta->rx_vlan_proto, VLAN_PID, "rx_vlan_proto"))
> + return -1;
> +
> xsk_ring_cons__release(&xsk->rx, 1);
> refill_rx(xsk, comp_addr);
>
> @@ -253,10 +266,14 @@ void test_xdp_metadata(void)
>
> SYS(out, "ip link set dev " TX_NAME " address " TX_MAC);
> SYS(out, "ip link set dev " TX_NAME " up");
> - SYS(out, "ip addr add " TX_ADDR "/" PREFIX_LEN " dev " TX_NAME);
> +
> + SYS(out, "ip link add link " TX_NAME " " TX_NAME_VLAN
> + " type vlan proto " VLAN_PROTO " id " VLAN_ID_STR);
> + SYS(out, "ip link set dev " TX_NAME_VLAN " up");
> + SYS(out, "ip addr add " TX_ADDR "/" PREFIX_LEN " dev " TX_NAME_VLAN);
>
> /* Avoid ARP calls */
> - SYS(out, "ip -4 neigh add " RX_ADDR " lladdr " RX_MAC " dev " TX_NAME);
> + SYS(out, "ip -4 neigh add " RX_ADDR " lladdr " RX_MAC " dev " TX_NAME_VLAN);
>
> set_netns(rx_netns);
> SYS(out, "ip link set dev " RX_NAME " address " RX_MAC);
> diff --git a/tools/testing/selftests/bpf/progs/xdp_metadata.c b/tools/testing/selftests/bpf/progs/xdp_metadata.c
> index d151d406a123..382984a5d1c9 100644
> --- a/tools/testing/selftests/bpf/progs/xdp_metadata.c
> +++ b/tools/testing/selftests/bpf/progs/xdp_metadata.c
> @@ -23,6 +23,9 @@ extern int bpf_xdp_metadata_rx_timestamp(const struct xdp_md *ctx,
> __u64 *timestamp) __ksym;
> extern int bpf_xdp_metadata_rx_hash(const struct xdp_md *ctx, __u32 *hash,
> enum xdp_rss_hash_type *rss_type) __ksym;
> +extern int bpf_xdp_metadata_rx_vlan_tag(const struct xdp_md *ctx,
> + __u16 *vlan_tag,
> + __be16 *vlan_proto) __ksym;
>
> SEC("xdp")
> int rx(struct xdp_md *ctx)
> @@ -57,6 +60,7 @@ int rx(struct xdp_md *ctx)
> meta->rx_timestamp = 1;
>
> bpf_xdp_metadata_rx_hash(ctx, &meta->rx_hash, &meta->rx_hash_type);
> + bpf_xdp_metadata_rx_vlan_tag(ctx, &meta->rx_vlan_tag, &meta->rx_vlan_proto);
>
> return bpf_redirect_map(&xsk, ctx->rx_queue_index, XDP_PASS);
> }
> --
> 2.41.0
>
