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Message-ID: <20250510015652.9931-5-kuniyu@amazon.com>
Date: Fri, 9 May 2025 18:56:27 -0700
From: Kuniyuki Iwashima <kuniyu@...zon.com>
To: "David S. Miller" <davem@...emloft.net>, Eric Dumazet
<edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni
<pabeni@...hat.com>, Willem de Bruijn <willemb@...gle.com>
CC: Simon Horman <horms@...nel.org>, Christian Brauner <brauner@...nel.org>,
Kuniyuki Iwashima <kuniyu@...zon.com>, Kuniyuki Iwashima
<kuni1840@...il.com>, <netdev@...r.kernel.org>
Subject: [PATCH v2 net-next 4/9] tcp: Restrict SO_TXREHASH to TCP socket.
sk->sk_txrehash is only used for TCP.
Let's restrict SO_TXREHASH to TCP to reflect this.
Later, we will make sk_txrehash a part of the union for other
protocol families, so we set 0 explicitly in getsockopt().
Signed-off-by: Kuniyuki Iwashima <kuniyu@...zon.com>
---
net/core/sock.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/net/core/sock.c b/net/core/sock.c
index b64df2463300..5c84a608ddd7 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -1276,6 +1276,8 @@ int sk_setsockopt(struct sock *sk, int level, int optname,
return 0;
}
case SO_TXREHASH:
+ if (!sk_is_tcp(sk))
+ return -EOPNOTSUPP;
if (val < -1 || val > 1)
return -EINVAL;
if ((u8)val == SOCK_TXREHASH_DEFAULT)
@@ -2102,8 +2104,11 @@ int sk_getsockopt(struct sock *sk, int level, int optname,
break;
case SO_TXREHASH:
- /* Paired with WRITE_ONCE() in sk_setsockopt() */
- v.val = READ_ONCE(sk->sk_txrehash);
+ if (sk_is_tcp(sk))
+ /* Paired with WRITE_ONCE() in sk_setsockopt() */
+ v.val = READ_ONCE(sk->sk_txrehash);
+ else
+ v.val = 0;
break;
default:
--
2.49.0
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