netdev - [PATCH bpf v2 1/4] bpf: Use ipv6_only_sock in bpf_tcp_gen

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Message-ID: <20220124151146.376446-2-maximmi@nvidia.com>
Date:   Mon, 24 Jan 2022 17:11:43 +0200
From:   Maxim Mikityanskiy <maximmi@...dia.com>
To:     <bpf@...r.kernel.org>, Alexei Starovoitov <ast@...nel.org>,
        "Daniel Borkmann" <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>, <netdev@...r.kernel.org>
CC:     Tariq Toukan <tariqt@...dia.com>, Martin KaFai Lau <kafai@...com>,
        "Song Liu" <songliubraving@...com>, Yonghong Song <yhs@...com>,
        John Fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Petar Penkov <ppenkov@...gle.com>,
        Lorenz Bauer <lmb@...udflare.com>,
        Eric Dumazet <edumazet@...gle.com>,
        Maxim Mikityanskiy <maximmi@...dia.com>
Subject: [PATCH bpf v2 1/4] bpf: Use ipv6_only_sock in bpf_tcp_gen_syncookie

Instead of querying the sk_ipv6only field directly, use the dedicated
ipv6_only_sock helper.

Fixes: 70d66244317e ("bpf: add bpf_tcp_gen_syncookie helper")
Signed-off-by: Maxim Mikityanskiy <maximmi@...dia.com>
Reviewed-by: Tariq Toukan <tariqt@...dia.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 4603b7cd3cd1..05efa691b796 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -6848,7 +6848,7 @@ BPF_CALL_5(bpf_tcp_gen_syncookie, struct sock *, sk, void *, iph, u32, iph_len,
 	 */
 	switch (((struct iphdr *)iph)->version) {
 	case 4:
-		if (sk->sk_family == AF_INET6 && sk->sk_ipv6only)
+		if (sk->sk_family == AF_INET6 && ipv6_only_sock(sk))
 			return -EINVAL;
 
 		mss = tcp_v4_get_syncookie(sk, iph, th, &cookie);
-- 
2.30.2