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 <maximmi@xxxxxxxxxx>
Reviewed-by: Tariq Toukan <tariqt@xxxxxxxxxx>
---
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
