diff options
| -rw-r--r-- | tools/testing/selftests/bpf/progs/test_sock_fields.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/tools/testing/selftests/bpf/progs/test_sock_fields.c b/tools/testing/selftests/bpf/progs/test_sock_fields.c index 43a17fdef226..9f4b8f9f1181 100644 --- a/tools/testing/selftests/bpf/progs/test_sock_fields.c +++ b/tools/testing/selftests/bpf/progs/test_sock_fields.c @@ -251,10 +251,16 @@ int ingress_read_sock_fields(struct __sk_buff *skb) return CG_OK; } +/* + * NOTE: 4-byte load from bpf_sock at dst_port offset is quirky. It + * gets rewritten by the access converter to a 2-byte load for + * backward compatibility. Treating the load result as a be16 value + * makes the code portable across little- and big-endian platforms. + */ static __noinline bool sk_dst_port__load_word(struct bpf_sock *sk) { __u32 *word = (__u32 *)&sk->dst_port; - return word[0] == bpf_htonl(0xcafe0000); + return word[0] == bpf_htons(0xcafe); } static __noinline bool sk_dst_port__load_half(struct bpf_sock *sk) |