[PATCH bpf v2 3/4] bpf: Use EOPNOTSUPP in bpf_tcp_check_syncookie
From: Maxim Mikityanskiy <hidden>
Date: 2022-01-24 15:13:14
Also in:
bpf
Subsystem:
bpf [general] (safe dynamic programs and tools), bpf [networking] (tcx & tc bpf, sock_addr), networking [general], the rest · Maintainers:
Alexei Starovoitov, Daniel Borkmann, Andrii Nakryiko, Eduard Zingerman, Kumar Kartikeya Dwivedi, Martin KaFai Lau, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
When CONFIG_SYN_COOKIES is off, bpf_tcp_check_syncookie returns
ENOTSUPP. It's a non-standard and deprecated code. The related function
bpf_tcp_gen_syncookie and most of the other functions use EOPNOTSUPP if
some feature is not available. This patch changes ENOTSUPP to EOPNOTSUPP
in bpf_tcp_check_syncookie.
Fixes: 399040847084 ("bpf: add helper to check for a valid SYN cookie")
Signed-off-by: Maxim Mikityanskiy <redacted>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
---
net/core/filter.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/core/filter.c b/net/core/filter.c
index 780e635fb52a..2c9106704821 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c@@ -6814,7 +6814,7 @@ BPF_CALL_5(bpf_tcp_check_syncookie, struct sock *, sk, void *, iph, u32, iph_len return -ENOENT; #else - return -ENOTSUPP; + return -EOPNOTSUPP; #endif }
--
2.30.2