From patchwork Sat Jan 9 00:47:57 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mat Martineau X-Patchwork-Id: 360091 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, 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 1DE92C433E0 for ; Sat, 9 Jan 2021 00:52:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DB42723A7C for ; Sat, 9 Jan 2021 00:52:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726437AbhAIAwi (ORCPT ); Fri, 8 Jan 2021 19:52:38 -0500 Received: from mga03.intel.com ([134.134.136.65]:32283 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726077AbhAIAwh (ORCPT ); Fri, 8 Jan 2021 19:52:37 -0500 IronPort-SDR: s4llfa5MrvdQtLQaFpHn46HiFeFw5IQgNYbaWzakn+m3Pz7xtRBJGhxHlTY/V3E8tT8B7uJUG/ 0jPG/dFYlscQ== X-IronPort-AV: E=McAfee;i="6000,8403,9858"; a="177771954" X-IronPort-AV: E=Sophos;i="5.79,333,1602572400"; d="scan'208";a="177771954" Received: from orsmga001.jf.intel.com ([10.7.209.18]) by orsmga103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 Jan 2021 16:48:09 -0800 IronPort-SDR: EPpn8NpJ6qPTERx0XuVAc/fXULwFc9kQzSe058WYudRkuALO7ugrys1nSojLI9iG3WwRm9yPVE 02Q/+ZlXHeLQ== X-IronPort-AV: E=Sophos;i="5.79,333,1602572400"; d="scan'208";a="423124500" Received: from mjmartin-nuc02.amr.corp.intel.com ([10.251.4.171]) by orsmga001-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 Jan 2021 16:48:09 -0800 From: Mat Martineau To: netdev@vger.kernel.org Cc: Geliang Tang , davem@davemloft.net, kuba@kernel.org, mptcp@lists.01.org, Mat Martineau Subject: [PATCH net-next 3/8] mptcp: add the outgoing MP_PRIO support Date: Fri, 8 Jan 2021 16:47:57 -0800 Message-Id: <20210109004802.341602-4-mathew.j.martineau@linux.intel.com> X-Mailer: git-send-email 2.30.0 In-Reply-To: <20210109004802.341602-1-mathew.j.martineau@linux.intel.com> References: <20210109004802.341602-1-mathew.j.martineau@linux.intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Geliang Tang This patch added the outgoing MP_PRIO logic: In mptcp_pm_nl_mp_prio_send_ack, find the related subflow and subsocket according to the input parameter addr. Save the input priority value to suflow's backup, then set subflow's send_mp_prio flag to true, and save the input priority value to suflow's request_bkup. Finally, send out a pure ACK on the related subsocket. In mptcp_established_options_mp_prio, check whether the subflow's send_mp_prio is set. If it is, this is the packet for sending MP_PRIO. So save subflow->request_bkup value to mptcp_out_options's backup, and change the option type to OPTION_MPTCP_PRIO. In mptcp_write_options, clear the send_mp_prio flag and send out the MP_PRIO suboption with mptcp_out_options's backup value. Signed-off-by: Geliang Tang Signed-off-by: Mat Martineau --- net/mptcp/options.c | 40 ++++++++++++++++++++++++++++++++++++++++ net/mptcp/pm_netlink.c | 33 +++++++++++++++++++++++++++++++++ net/mptcp/protocol.h | 6 ++++++ 3 files changed, 79 insertions(+) diff --git a/net/mptcp/options.c b/net/mptcp/options.c index e0d21c0607e5..ef50a8628d77 100644 --- a/net/mptcp/options.c +++ b/net/mptcp/options.c @@ -679,6 +679,28 @@ static bool mptcp_established_options_rm_addr(struct sock *sk, return true; } +static bool mptcp_established_options_mp_prio(struct sock *sk, + unsigned int *size, + unsigned int remaining, + struct mptcp_out_options *opts) +{ + struct mptcp_subflow_context *subflow = mptcp_subflow_ctx(sk); + + if (!subflow->send_mp_prio) + return false; + + if (remaining < TCPOLEN_MPTCP_PRIO) + return false; + + *size = TCPOLEN_MPTCP_PRIO; + opts->suboptions |= OPTION_MPTCP_PRIO; + opts->backup = subflow->request_bkup; + + pr_debug("prio=%d", opts->backup); + + return true; +} + bool mptcp_established_options(struct sock *sk, struct sk_buff *skb, unsigned int *size, unsigned int remaining, struct mptcp_out_options *opts) @@ -721,6 +743,12 @@ bool mptcp_established_options(struct sock *sk, struct sk_buff *skb, ret = true; } + if (mptcp_established_options_mp_prio(sk, &opt_size, remaining, opts)) { + *size += opt_size; + remaining -= opt_size; + ret = true; + } + return ret; } @@ -1168,6 +1196,18 @@ void mptcp_write_options(__be32 *ptr, const struct tcp_sock *tp, 0, opts->rm_id); } + if (OPTION_MPTCP_PRIO & opts->suboptions) { + const struct sock *ssk = (const struct sock *)tp; + struct mptcp_subflow_context *subflow; + + subflow = mptcp_subflow_ctx(ssk); + subflow->send_mp_prio = 0; + + *ptr++ = mptcp_option(MPTCPOPT_MP_PRIO, + TCPOLEN_MPTCP_PRIO, + opts->backup, TCPOPT_NOP); + } + if (OPTION_MPTCP_MPJ_SYN & opts->suboptions) { *ptr++ = mptcp_option(MPTCPOPT_MP_JOIN, TCPOLEN_MPTCP_MPJ_SYN, diff --git a/net/mptcp/pm_netlink.c b/net/mptcp/pm_netlink.c index 7fe7be4eef7e..bf0d13c85a68 100644 --- a/net/mptcp/pm_netlink.c +++ b/net/mptcp/pm_netlink.c @@ -442,6 +442,39 @@ void mptcp_pm_nl_add_addr_send_ack(struct mptcp_sock *msk) } } +int mptcp_pm_nl_mp_prio_send_ack(struct mptcp_sock *msk, + struct mptcp_addr_info *addr, + u8 bkup) +{ + struct mptcp_subflow_context *subflow; + + pr_debug("bkup=%d", bkup); + + mptcp_for_each_subflow(msk, subflow) { + struct sock *ssk = mptcp_subflow_tcp_sock(subflow); + struct mptcp_addr_info local; + + local_address((struct sock_common *)ssk, &local); + if (!addresses_equal(&local, addr, addr->port)) + continue; + + subflow->backup = bkup; + subflow->send_mp_prio = 1; + subflow->request_bkup = bkup; + + spin_unlock_bh(&msk->pm.lock); + pr_debug("send ack for mp_prio"); + lock_sock(ssk); + tcp_send_ack(ssk); + release_sock(ssk); + spin_lock_bh(&msk->pm.lock); + + return 0; + } + + return -EINVAL; +} + void mptcp_pm_nl_rm_addr_received(struct mptcp_sock *msk) { struct mptcp_subflow_context *subflow, *tmp; diff --git a/net/mptcp/protocol.h b/net/mptcp/protocol.h index d67de793d363..21763e00d990 100644 --- a/net/mptcp/protocol.h +++ b/net/mptcp/protocol.h @@ -24,6 +24,7 @@ #define OPTION_MPTCP_ADD_ADDR6 BIT(7) #define OPTION_MPTCP_RM_ADDR BIT(8) #define OPTION_MPTCP_FASTCLOSE BIT(9) +#define OPTION_MPTCP_PRIO BIT(10) /* MPTCP option subtypes */ #define MPTCPOPT_MP_CAPABLE 0 @@ -59,6 +60,7 @@ #define TCPOLEN_MPTCP_ADD_ADDR6_BASE_PORT 24 #define TCPOLEN_MPTCP_PORT_LEN 4 #define TCPOLEN_MPTCP_RM_ADDR_BASE 4 +#define TCPOLEN_MPTCP_PRIO 4 #define TCPOLEN_MPTCP_FASTCLOSE 12 /* MPTCP MP_JOIN flags */ @@ -396,6 +398,7 @@ struct mptcp_subflow_context { map_valid : 1, mpc_map : 1, backup : 1, + send_mp_prio : 1, rx_eof : 1, can_ack : 1, /* only after processing the remote a key */ disposable : 1; /* ctx can be free at ulp release time */ @@ -550,6 +553,9 @@ void mptcp_pm_add_addr_received(struct mptcp_sock *msk, const struct mptcp_addr_info *addr); void mptcp_pm_add_addr_send_ack(struct mptcp_sock *msk); void mptcp_pm_rm_addr_received(struct mptcp_sock *msk, u8 rm_id); +int mptcp_pm_nl_mp_prio_send_ack(struct mptcp_sock *msk, + struct mptcp_addr_info *addr, + u8 bkup); void mptcp_pm_free_anno_list(struct mptcp_sock *msk); struct mptcp_pm_add_entry * mptcp_pm_del_add_timer(struct mptcp_sock *msk,