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selftests/bpf: Cover 4-byte load from remote_port in bpf_sk_lookup

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Extend the context access tests for sk_lookup prog to cover the surprising
case of a 4-byte load from the remote_port field, where the expected value
is actually shifted by 16 bits.

Signed-off-by: Jakub Sitnicki <jakub@cloudflare.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/bpf/20220209184333.654927-3-jakub@cloudflare.com
This commit is contained in:
Jakub Sitnicki 2022-02-09 19:43:33 +01:00 • committed by Alexei Starovoitov
parent 9a69e2b385
commit 2ed0dc5937
2 changed files with 8 additions and 1 deletions
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3
tools/include/uapi/linux/bpf.h
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@ -6453,7 +6453,8 @@ struct bpf_sk_lookup {
__u32 protocol; /* IP protocol (IPPROTO_TCP, IPPROTO_UDP) */
__u32 remote_ip4; /* Network byte order */
__u32 remote_ip6[4]; /* Network byte order */
__u32 remote_port; /* Network byte order */
__be16 remote_port; /* Network byte order */
__u16 :16; /* Zero padding */
__u32 local_ip4; /* Network byte order */
__u32 local_ip6[4]; /* Network byte order */
__u32 local_port; /* Host byte order */