From nobody Wed Sep 17 19:38:44 2025 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 0D64DDDC3 for ; Tue, 12 Aug 2025 08:17:32 +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=1754986653; cv=none; b=st05/dM/R0+XFqwjQpY3UoRHIcZXP7wISD+uwKC+4LudeRtPj+ZFrg6DwdhmpgmAf+Z8o29dQxgwq2wSixOsftD77K6K6JCOOj/1gsWNKaaoW8jkj7DhnMI6PWfTbu1pcvIGz34y3ZU0+BWEECW/H5z7jGUUVcgbbpHqMns/9u4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1754986653; c=relaxed/simple; bh=9pJf1zRuo0TP5+4IWk2SSqRJMnP9mlqynIWJyZQ5+vA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=VZaHmUtBL5BbjBDjt1DGpUIgXOjt94WLyx3uaTlQSlWZBmP+Jcs5wu8Ke8pgrclNAIIO3AEuioDTY6Ehy6MCdHX/bbRKlqPQxB2MsVjsOGvZLMBeJ4Nw4/bvR8N2iHNKCkOLm8tJOwy9cWctNW228a/MVZ4NQrCkWVjh7Th1XG8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=topL40zy; 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="topL40zy" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D22E0C4CEF6; Tue, 12 Aug 2025 08:17:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1754986652; bh=9pJf1zRuo0TP5+4IWk2SSqRJMnP9mlqynIWJyZQ5+vA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=topL40zyxUQ0MWukzYiW5kw7TwbJOfWta48avE3lRTbk15V4Z/o4TQIncAiKmzG4S opMcM1US+ZW5i/ZW2k6Ij9A6XemHojs5IBGljDfvzrYzTcz3m8KpCyJ3z7RREbzaNx 1aEctVIy11ucdMWWq/jtF4/YRhzdmzQ8VNymUXxNKdfYACvc6SgR7MSrLpIieKiv6m t8AhmkatzOtEE5KaUB3OtR8EIgZ1XlvW49AusrIhYhSQDtCINl24viz1ObFA4Abaxs yABci/rjZXDdJTehBR3rnoGrlMWYHxYM4KEf2Z+PRczoT8ggS+rmZJd99+K/6bfPgz bpG43CB4QRnmg== From: Geliang Tang To: mptcp@lists.linux.dev Cc: Geliang Tang Subject: [PATCH mptcp-next 1/6] mptcp: add helper for setsockopt on first subflow only Date: Tue, 12 Aug 2025 16:17:16 +0800 Message-ID: X-Mailer: git-send-email 2.48.1 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 Implement mptcp_setsockopt_first_sf_only() helper to manage setsockopt operations applied solely to the first subflow. This centralizes handling of TCP-level options that require synchronization only with the initial subflow. Signed-off-by: Geliang Tang --- net/mptcp/sockopt.c | 19 ++++++++++++++++--- 1 file changed, 16 insertions(+), 3 deletions(-) diff --git a/net/mptcp/sockopt.c b/net/mptcp/sockopt.c index 2c267aff95be..6cc073fab17c 100644 --- a/net/mptcp/sockopt.c +++ b/net/mptcp/sockopt.c @@ -776,8 +776,8 @@ static int mptcp_setsockopt_v4(struct mptcp_sock *msk, = int optname, return -EOPNOTSUPP; } =20 -static int mptcp_setsockopt_first_sf_only(struct mptcp_sock *msk, int leve= l, int optname, - sockptr_t optval, unsigned int optlen) +static int mptcp_setsockopt_sol_tcp_first_sf_only(struct mptcp_sock *msk, = int optname, + sockptr_t optval, unsigned int optlen) { struct sock *sk =3D (struct sock *)msk; struct sock *ssk; @@ -791,13 +791,26 @@ static int mptcp_setsockopt_first_sf_only(struct mptc= p_sock *msk, int level, int goto unlock; } =20 - ret =3D tcp_setsockopt(ssk, level, optname, optval, optlen); + ret =3D tcp_setsockopt(ssk, SOL_TCP, optname, optval, optlen); =20 unlock: release_sock(sk); return ret; } =20 +static int mptcp_setsockopt_first_sf_only(struct mptcp_sock *msk, int leve= l, + int optname, sockptr_t optval, + unsigned int optlen) +{ + switch (level) { + case SOL_TCP: + return mptcp_setsockopt_sol_tcp_first_sf_only(msk, optname, + optval, optlen); + } + + return -EOPNOTSUPP; +} + static int mptcp_setsockopt_all_sf(struct mptcp_sock *msk, int level, int optname, sockptr_t optval, unsigned int optlen) --=20 2.48.1