Jakub Sitnicki d4cc2fb138 bpf: Make remote_port field in struct bpf_sk_lookup 16-bit wide ... commit 9a69e2b385 upstream. remote_port is another case of a BPF context field documented as a 32-bit value in network byte order for which the BPF context access converter generates a load of a zero-padded 16-bit integer in network byte order. First such case was dst_port in bpf_sock which got addressed in commit 4421a58271 ("bpf: Make dst_port field in struct bpf_sock 16-bit wide"). Loading 4-bytes from the remote_port offset and converting the value with bpf_ntohl() leads to surprising results, as the expected value is shifted by 16 bits. Reduce the confusion by splitting the field in two - a 16-bit field holding a big-endian integer, and a 16-bit zero-padding anonymous field that follows it. Suggested-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Jakub Sitnicki <jakub@cloudflare.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20220209184333.654927-2-jakub@cloudflare.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2022-04-13 19:27:40 +02:00
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Makefile	bpf: Add dummy BPF STRUCT_OPS for test purpose	2021-11-01 14:10:00 -07:00
bpf_dummy_struct_ops.c	bpf: Add dummy BPF STRUCT_OPS for test purpose	2021-11-01 14:10:00 -07:00
test_run.c	bpf: Make remote_port field in struct bpf_sk_lookup 16-bit wide	2022-04-13 19:27:40 +02:00