From nobody Sun Mar 22 09:57:55 2026 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E47AC379999 for ; Thu, 19 Mar 2026 10:09:12 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773914953; cv=none; b=jz8vLoCUkHj58SLU1BOsVB2uTU4Veve3u61kFQugH/tLZhsoA3zXgsDfjKyQcUFoCYf7GL16o9iyvIRd2g9eThXZTc83jS3ZRqyuzehL5dmMNONuI/6A2i2TWq0DGmnAxDCYTe078viKRbqYkAVknZWrOqYaRl/vDQPkQBtLhyA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773914953; c=relaxed/simple; bh=Br96xUOeotLpe4KwgDWfp58kFiwJy9hqm5vdUL2bFyI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=tnVq4mQcoXZsCrfwu6ZCLBwSQutg2VpaUj19easunQVbIJ2EXp3yPquN0vyQlR9i1j7DDIUNpgrtRcSF/pp9fcSIC96XWaxHnYk910hWcS3aCyaPCHYVsZW8DRv/BtX7bhmWiz03+IJUdekC52IHXJM0dvQh9gu6pI4QP6E0MYw= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=g6J9EobV; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="g6J9EobV" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 22561C19424; Thu, 19 Mar 2026 10:09:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1773914952; bh=Br96xUOeotLpe4KwgDWfp58kFiwJy9hqm5vdUL2bFyI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=g6J9EobVtADSU8GhiFqC8Ibjr/SB34/bJ3u0Waeovsi4kyQy6LnuVk2g+pCmpnkXQ eweAC1LdN1SexZEGDxu1Vi/ORbYHSmEeLVXzXZH5/HBMbbqxs4yCmksGA7oih4BI0q 5QUmMiEM0V8zVd4WVe6ZZIG9kDISuPxHrnDfEadmxG2cBugvh68YC6QAmL3jJKYmlm cP5vjZUCWHOLp1y9bwdAmlv3NOMlrzMcEHez0rGIcYnCnqGNqSm44lKw3n/B9f22Xs UP0XHBsL/xh6Sdo4yY1WGp51sn+Ov/9SZldnsAIm9fkmvRSZuNSdbJPPvJY7Wz7HhE ZlJsSauaFYbSw== From: Geliang Tang To: mptcp@lists.linux.dev Cc: Geliang Tang , Gang Yan Subject: [RFC mptcp-next v11 08/15] mptcp: update ULP getsockopt for TLS support Date: Thu, 19 Mar 2026 18:08:41 +0800 Message-ID: <1ed3c6bb8572953a1c0f6a0a1c457cc7b6c714cb.1773911536.git.tanggeliang@kylinos.cn> X-Mailer: git-send-email 2.53.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: mptcp@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Geliang Tang This patch extracts TCP_ULP getsockopt operation into a tcp_sock_get_ulp() helper so that it can also be used in MPTCP. TCP_ULP was obtained by calling mptcp_getsockopt_first_sf_only() to get ULP of the first subflow. Now that the mechanism has changed, a new helper mptcp_getsockopt_tcp_ulp() is added to get ULP of msk. Co-developed-by: Gang Yan Signed-off-by: Gang Yan Signed-off-by: Geliang Tang --- include/linux/tcp.h | 1 + net/ipv4/tcp.c | 36 ++++++++++++++++++++++-------------- net/mptcp/sockopt.c | 12 ++++++++++++ 3 files changed, 35 insertions(+), 14 deletions(-) diff --git a/include/linux/tcp.h b/include/linux/tcp.h index 6982f10e826b..2bb1cbd3eeab 100644 --- a/include/linux/tcp.h +++ b/include/linux/tcp.h @@ -653,6 +653,7 @@ void tcp_sock_set_quickack(struct sock *sk, int val); int tcp_sock_set_syncnt(struct sock *sk, int val); int tcp_sock_set_user_timeout(struct sock *sk, int val); int tcp_sock_set_maxseg(struct sock *sk, int val); +int tcp_sock_get_ulp(struct sock *sk, sockptr_t optval, sockptr_t optlen); =20 static inline bool dst_tcp_usec_ts(const struct dst_entry *dst) { diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c index 23a35201a05a..55d8fb848842 100644 --- a/net/ipv4/tcp.c +++ b/net/ipv4/tcp.c @@ -4495,6 +4495,27 @@ struct sk_buff *tcp_get_timestamping_opt_stats(const= struct sock *sk, return stats; } =20 +int tcp_sock_get_ulp(struct sock *sk, sockptr_t optval, sockptr_t optlen) +{ + struct inet_connection_sock *icsk =3D inet_csk(sk); + int len; + + if (copy_from_sockptr(&len, optlen, sizeof(int))) + return -EFAULT; + len =3D min_t(unsigned int, len, TCP_ULP_NAME_MAX); + if (!icsk->icsk_ulp_ops) { + len =3D 0; + if (copy_to_sockptr(optlen, &len, sizeof(int))) + return -EFAULT; + return 0; + } + if (copy_to_sockptr(optlen, &len, sizeof(int))) + return -EFAULT; + if (copy_to_sockptr(optval, icsk->icsk_ulp_ops->name, len)) + return -EFAULT; + return 0; +} + int do_tcp_getsockopt(struct sock *sk, int level, int optname, sockptr_t optval, sockptr_t optlen) { @@ -4604,20 +4625,7 @@ int do_tcp_getsockopt(struct sock *sk, int level, return 0; =20 case TCP_ULP: - if (copy_from_sockptr(&len, optlen, sizeof(int))) - return -EFAULT; - len =3D min_t(unsigned int, len, TCP_ULP_NAME_MAX); - if (!icsk->icsk_ulp_ops) { - len =3D 0; - if (copy_to_sockptr(optlen, &len, sizeof(int))) - return -EFAULT; - return 0; - } - if (copy_to_sockptr(optlen, &len, sizeof(int))) - return -EFAULT; - if (copy_to_sockptr(optval, icsk->icsk_ulp_ops->name, len)) - return -EFAULT; - return 0; + return tcp_sock_get_ulp(sk, optval, optlen); =20 case TCP_FASTOPEN_KEY: { u64 key[TCP_FASTOPEN_KEY_BUF_LENGTH / sizeof(u64)]; diff --git a/net/mptcp/sockopt.c b/net/mptcp/sockopt.c index de90a2897d2d..a6230f7910fd 100644 --- a/net/mptcp/sockopt.c +++ b/net/mptcp/sockopt.c @@ -1393,6 +1393,17 @@ static int mptcp_put_int_option(struct mptcp_sock *m= sk, char __user *optval, return 0; } =20 +static int mptcp_getsockopt_tcp_ulp(struct sock *sk, char __user *optval, + int __user *optlen) +{ + int ret; + + lock_sock(sk); + ret =3D tcp_sock_get_ulp(sk, USER_SOCKPTR(optval), USER_SOCKPTR(optlen)); + release_sock(sk); + return ret; +} + static int mptcp_getsockopt_sol_tcp(struct mptcp_sock *msk, int optname, char __user *optval, int __user *optlen) { @@ -1400,6 +1411,7 @@ static int mptcp_getsockopt_sol_tcp(struct mptcp_sock= *msk, int optname, =20 switch (optname) { case TCP_ULP: + return mptcp_getsockopt_tcp_ulp(sk, optval, optlen); case TCP_CONGESTION: case TCP_INFO: case TCP_CC_INFO: --=20 2.53.0