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selftests/bpf: Allow VLAN packets in xdp_hw_metadata

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Make VLAN c-tag and s-tag XDP hint testing more convenient
by not skipping VLAN-ed packets.

Allow both 802.1ad and 802.1Q headers.

Acked-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Larysa Zaremba <larysa.zaremba@intel.com>
Link: https://lore.kernel.org/r/20231205210847.28460-16-larysa.zaremba@intel.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Larysa Zaremba 2023-12-05 22:08:44 +01:00 committed by Alexei Starovoitov
parent 7978bad4b6
commit e71a9fa7fd
2 changed files with 17 additions and 1 deletions
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10
tools/testing/selftests/bpf/progs/xdp_hw_metadata.c
View file

@ -26,15 +26,23 @@ int rx(struct xdp_md *ctx)
{
void *data, *data_meta, *data_end;
struct ipv6hdr *ip6h = NULL;
struct ethhdr *eth = NULL;
struct udphdr *udp = NULL;
struct iphdr *iph = NULL;
struct xdp_meta *meta;
struct ethhdr *eth;
int err;
data = (void *)(long)ctx->data;
data_end = (void *)(long)ctx->data_end;
eth = data;
if (eth + 1 < data_end && (eth->h_proto == bpf_htons(ETH_P_8021AD) ||
eth->h_proto == bpf_htons(ETH_P_8021Q)))
eth = (void *)eth + sizeof(struct vlan_hdr);
if (eth + 1 < data_end && eth->h_proto == bpf_htons(ETH_P_8021Q))
eth = (void *)eth + sizeof(struct vlan_hdr);
if (eth + 1 < data_end) {
if (eth->h_proto == bpf_htons(ETH_P_IP)) {
iph = (void *)(eth + 1);

8
tools/testing/selftests/bpf/xdp_metadata.h
View file

@ -9,6 +9,14 @@
#define ETH_P_IPV6 0x86DD
#endif
#ifndef ETH_P_8021Q
#define ETH_P_8021Q 0x8100
#endif
#ifndef ETH_P_8021AD
#define ETH_P_8021AD 0x88A8
#endif
struct xdp_meta {
__u64 rx_timestamp;
__u64 xdp_timestamp;