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[bpf-next,v6,11/12] sock_map: update sock type checks for UDP

Message ID 20210323003808.16074-12-xiyou.wangcong@gmail.com
State Superseded
Headers show
Series sockmap: introduce BPF_SK_SKB_VERDICT and support UDP | expand

Commit Message

Cong Wang March 23, 2021, 12:38 a.m. UTC 
From: Cong Wang <cong.wang@bytedance.com>

Now UDP supports sockmap and redirection, we can safely update
the sock type checks for it accordingly.

Cc: John Fastabend <john.fastabend@gmail.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Jakub Sitnicki <jakub@cloudflare.com>
Cc: Lorenz Bauer <lmb@cloudflare.com>
Signed-off-by: Cong Wang <cong.wang@bytedance.com>
---
 net/core/sock_map.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
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Patch

diff --git a/net/core/sock_map.c b/net/core/sock_map.c
index d04b98fc8104..9ed040c7d9e7 100644
--- a/net/core/sock_map.c
+++ b/net/core/sock_map.c
@@ -549,7 +549,10 @@  static bool sk_is_udp(const struct sock *sk)
 
 static bool sock_map_redirect_allowed(const struct sock *sk)
 {
-	return sk_is_tcp(sk) && sk->sk_state != TCP_LISTEN;
+	if (sk_is_tcp(sk))
+		return sk->sk_state != TCP_LISTEN;
+	else
+		return sk->sk_state == TCP_ESTABLISHED;
 }
 
 static bool sock_map_sk_is_suitable(const struct sock *sk)