[PATCH bpf-next 12/17] bpf: Embed kernel CONFIG check into the if statement in bpf_getsockopt

[Martin KaFai Lau <kafai@xxxxxx>]

This patch moves the "#ifdef CONFIG_XXX" check into the "if/else"
statement itself.  The change is done for the bpf_getsockopt()
function only.  It will make the latter patches easier to follow
without the surrounding ifdef macro.

Signed-off-by: Martin KaFai Lau <kafai@xxxxxx>
---
 net/core/filter.c | 11 ++++-------
 1 file changed, 4 insertions(+), 7 deletions(-)

diff --git a/net/core/filter.c b/net/core/filter.c
index 8e7fc71160cd..347c38da1e0c 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -5218,8 +5218,8 @@ static int __bpf_getsockopt(struct sock *sk, int level, int optname,
 		default:
 			goto err_clear;
 		}
-#ifdef CONFIG_INET
-	} else if (level == SOL_TCP && sk->sk_prot->getsockopt == tcp_getsockopt) {
+	} else if (IS_ENABLED(CONFIG_INET) &&
+		   level == SOL_TCP && sk->sk_prot->getsockopt == tcp_getsockopt) {
 		struct inet_connection_sock *icsk;
 		struct tcp_sock *tp;
 
@@ -5243,7 +5243,7 @@ static int __bpf_getsockopt(struct sock *sk, int level, int optname,
 		default:
 			goto err_clear;
 		}
-	} else if (level == SOL_IP) {
+	} else if (IS_ENABLED(CONFIG_INET) && level == SOL_IP) {
 		struct inet_sock *inet = inet_sk(sk);
 
 		if (optlen != sizeof(int) || sk->sk_family != AF_INET)
@@ -5257,8 +5257,7 @@ static int __bpf_getsockopt(struct sock *sk, int level, int optname,
 		default:
 			goto err_clear;
 		}
-#if IS_ENABLED(CONFIG_IPV6)
-	} else if (level == SOL_IPV6) {
+	} else if (IS_ENABLED(CONFIG_IPV6) && level == SOL_IPV6) {
 		struct ipv6_pinfo *np = inet6_sk(sk);
 
 		if (optlen != sizeof(int) || sk->sk_family != AF_INET6)
@@ -5272,8 +5271,6 @@ static int __bpf_getsockopt(struct sock *sk, int level, int optname,
 		default:
 			goto err_clear;
 		}
-#endif
-#endif
 	} else {
 		goto err_clear;
 	}
-- 
2.30.2