From patchwork Thu Apr 15 23:44:55 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mat Martineau X-Patchwork-Id: 422183 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 87E96C43461 for ; Thu, 15 Apr 2021 23:45:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6A10C61074 for ; Thu, 15 Apr 2021 23:45:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237974AbhDOXpl (ORCPT ); Thu, 15 Apr 2021 19:45:41 -0400 Received: from mga01.intel.com ([192.55.52.88]:63174 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236787AbhDOXpc (ORCPT ); Thu, 15 Apr 2021 19:45:32 -0400 IronPort-SDR: Z5xYgPouBuMfx7Jst7ccg3nSop3KUccE0k1Q0AvZc8ylVZITDrbfTZMyv4Wj6UGdt1TUBuiuMH Ia/w4/rrfzAQ== X-IronPort-AV: E=McAfee;i="6200,9189,9955"; a="215480161" X-IronPort-AV: E=Sophos;i="5.82,226,1613462400"; d="scan'208";a="215480161" Received: from orsmga001.jf.intel.com ([10.7.209.18]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 15 Apr 2021 16:45:08 -0700 IronPort-SDR: oXcO+T70XrIKJyvX6gmp1SlRTF8xeOQIOPcgBEhYahqiNBFaQ7VZezvLFmdYVrUEEPLiF+CSHA qG/P7guI/buw== X-IronPort-AV: E=Sophos;i="5.82,226,1613462400"; d="scan'208";a="461793361" Received: from mjmartin-desk2.amr.corp.intel.com (HELO mjmartin-desk2.intel.com) ([10.212.243.150]) by orsmga001-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 15 Apr 2021 16:45:08 -0700 From: Mat Martineau To: netdev@vger.kernel.org Cc: Florian Westphal , davem@davemloft.net, kuba@kernel.org, matthieu.baerts@tessares.net, mptcp@lists.linux.dev, Paolo Abeni , Mat Martineau Subject: [PATCH net-next 06/13] mptcp: setsockopt: handle SO_KEEPALIVE and SO_PRIORITY Date: Thu, 15 Apr 2021 16:44:55 -0700 Message-Id: <20210415234502.224225-7-mathew.j.martineau@linux.intel.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210415234502.224225-1-mathew.j.martineau@linux.intel.com> References: <20210415234502.224225-1-mathew.j.martineau@linux.intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Florian Westphal start with something simple: both take an integer value, both need to be mirrored to all subflows. Acked-by: Paolo Abeni Signed-off-by: Florian Westphal Signed-off-by: Mat Martineau --- net/mptcp/sockopt.c | 106 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 106 insertions(+) diff --git a/net/mptcp/sockopt.c b/net/mptcp/sockopt.c index 27b49543fc58..9be4c94ff4d4 100644 --- a/net/mptcp/sockopt.c +++ b/net/mptcp/sockopt.c @@ -45,6 +45,90 @@ static u32 sockopt_seq_reset(const struct sock *sk) return (u32)sk->sk_state << 24u; } +static void sockopt_seq_inc(struct mptcp_sock *msk) +{ + u32 seq = (msk->setsockopt_seq + 1) & 0x00ffffff; + + msk->setsockopt_seq = sockopt_seq_reset((struct sock *)msk) + seq; +} + +static int mptcp_get_int_option(struct mptcp_sock *msk, sockptr_t optval, + unsigned int optlen, int *val) +{ + if (optlen < sizeof(int)) + return -EINVAL; + + if (copy_from_sockptr(val, optval, sizeof(*val))) + return -EFAULT; + + return 0; +} + +static void mptcp_sol_socket_sync_intval(struct mptcp_sock *msk, int optname, int val) +{ + struct mptcp_subflow_context *subflow; + struct sock *sk = (struct sock *)msk; + + lock_sock(sk); + sockopt_seq_inc(msk); + + mptcp_for_each_subflow(msk, subflow) { + struct sock *ssk = mptcp_subflow_tcp_sock(subflow); + bool slow = lock_sock_fast(ssk); + + switch (optname) { + case SO_KEEPALIVE: + if (ssk->sk_prot->keepalive) + ssk->sk_prot->keepalive(ssk, !!val); + sock_valbool_flag(ssk, SOCK_KEEPOPEN, !!val); + break; + case SO_PRIORITY: + ssk->sk_priority = val; + break; + } + + subflow->setsockopt_seq = msk->setsockopt_seq; + unlock_sock_fast(ssk, slow); + } + + release_sock(sk); +} + +static int mptcp_sol_socket_intval(struct mptcp_sock *msk, int optname, int val) +{ + sockptr_t optval = KERNEL_SOCKPTR(&val); + struct sock *sk = (struct sock *)msk; + int ret; + + ret = sock_setsockopt(sk->sk_socket, SOL_SOCKET, optname, + optval, sizeof(val)); + if (ret) + return ret; + + mptcp_sol_socket_sync_intval(msk, optname, val); + return 0; +} + +static int mptcp_setsockopt_sol_socket_int(struct mptcp_sock *msk, int optname, + sockptr_t optval, unsigned int optlen) +{ + int val, ret; + + ret = mptcp_get_int_option(msk, optval, optlen, &val); + if (ret) + return ret; + + switch (optname) { + case SO_KEEPALIVE: + mptcp_sol_socket_sync_intval(msk, optname, val); + return 0; + case SO_PRIORITY: + return mptcp_sol_socket_intval(msk, optname, val); + } + + return -ENOPROTOOPT; +} + static int mptcp_setsockopt_sol_socket(struct mptcp_sock *msk, int optname, sockptr_t optval, unsigned int optlen) { @@ -71,6 +155,9 @@ static int mptcp_setsockopt_sol_socket(struct mptcp_sock *msk, int optname, } release_sock(sk); return ret; + case SO_KEEPALIVE: + case SO_PRIORITY: + return mptcp_setsockopt_sol_socket_int(msk, optname, optval, optlen); } return sock_setsockopt(sk->sk_socket, SOL_SOCKET, optname, optval, optlen); @@ -371,8 +458,27 @@ int mptcp_getsockopt(struct sock *sk, int level, int optname, return -EOPNOTSUPP; } +static void sync_socket_options(struct mptcp_sock *msk, struct sock *ssk) +{ + struct sock *sk = (struct sock *)msk; + + if (ssk->sk_prot->keepalive) { + if (sock_flag(sk, SOCK_KEEPOPEN)) + ssk->sk_prot->keepalive(ssk, 1); + else + ssk->sk_prot->keepalive(ssk, 0); + } + + ssk->sk_priority = sk->sk_priority; +} + static void __mptcp_sockopt_sync(struct mptcp_sock *msk, struct sock *ssk) { + bool slow = lock_sock_fast(ssk); + + sync_socket_options(msk, ssk); + + unlock_sock_fast(ssk, slow); } void mptcp_sockopt_sync(struct mptcp_sock *msk, struct sock *ssk)