From patchwork Wed May 13 06:26:43 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 11544955 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 710D4159A for ; Wed, 13 May 2020 06:30:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5604820708 for ; Wed, 13 May 2020 06:30:50 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="sR5EMxLZ" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731620AbgEMG2v (ORCPT ); Wed, 13 May 2020 02:28:51 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46150 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730668AbgEMG2s (ORCPT ); Wed, 13 May 2020 02:28:48 -0400 Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:e::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id ED09BC061A0E; Tue, 12 May 2020 23:28:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender :Reply-To:Content-Type:Content-ID:Content-Description; bh=VriKupxRYsJlL2uxVcilvd0cTKLGSfORdeySMsHEWM0=; b=sR5EMxLZAt8B7bA1KxAxjuv6wd og2rytl6Jc0A+7hlcV8EXWIPDvh8UgyAUErFODUlIipxvuEJxEu+x0A+pFk4I9pySnf1f6T/pJsTu KUB2RdqvTmiJkfhDXGEnvLdf2lvs3k6LXxLu8DoXiOA5hsxN5fm073OAF4CTNSLl0Ep1EftErwAfc ruLPqbJ9CiN7AAnc5ZtNGwBAsO1fO1kYiDgavZXz4LAWVgsG1wmLD7Lx1Aqs0ZTJ+3mTtyrj5sjE6 Cyq8JY7tvf4boI1g+6bKr+ilMXPAkaVbj0N5rx+PLXDX6Fpi6bbyIG6W385vcDxJrl4RMddG0+l3X 3F/wY21g==; Received: from [2001:4bb8:180:9d3f:c70:4a89:bc61:2] (helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1jYksL-00054q-LC; Wed, 13 May 2020 06:28:18 +0000 From: Christoph Hellwig To: "David S. Miller" , Jakub Kicinski Cc: Eric Dumazet , Alexey Kuznetsov , Hideaki YOSHIFUJI , Vlad Yasevich , Neil Horman , Marcelo Ricardo Leitner , Jon Maloy , Ying Xue , drbd-dev@lists.linbit.com, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, linux-nvme@lists.infradead.org, target-devel@vger.kernel.org, linux-afs@lists.infradead.org, linux-cifs@vger.kernel.org, cluster-devel@redhat.com, ocfs2-devel@oss.oracle.com, netdev@vger.kernel.org, linux-sctp@vger.kernel.org, ceph-devel@vger.kernel.org, rds-devel@oss.oracle.com, linux-nfs@vger.kernel.org Subject: [PATCH 28/33] sctp: add sctp_sock_set_nodelay Date: Wed, 13 May 2020 08:26:43 +0200 Message-Id: <20200513062649.2100053-29-hch@lst.de> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200513062649.2100053-1-hch@lst.de> References: <20200513062649.2100053-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-rdma-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org Add a helper to directly set the SCTP_NODELAY sockopt from kernel space without going through a fake uaccess. Signed-off-by: Christoph Hellwig --- fs/dlm/lowcomms.c | 10 ++-------- include/net/sctp/sctp.h | 1 + net/sctp/socket.c | 8 ++++++++ 3 files changed, 11 insertions(+), 8 deletions(-) diff --git a/fs/dlm/lowcomms.c b/fs/dlm/lowcomms.c index e4939d770df53..6fa45365666a8 100644 --- a/fs/dlm/lowcomms.c +++ b/fs/dlm/lowcomms.c @@ -1034,7 +1034,6 @@ static int sctp_bind_addrs(struct connection *con, uint16_t port) static void sctp_connect_to_sock(struct connection *con) { struct sockaddr_storage daddr; - int one = 1; int result; int addr_len; struct socket *sock; @@ -1081,8 +1080,7 @@ static void sctp_connect_to_sock(struct connection *con) log_print("connecting to %d", con->nodeid); /* Turn off Nagle's algorithm */ - kernel_setsockopt(sock, SOL_SCTP, SCTP_NODELAY, (char *)&one, - sizeof(one)); + sctp_sock_set_nodelay(sock->sk, true); /* * Make sock->ops->connect() function return in specified time, @@ -1296,7 +1294,6 @@ static int sctp_listen_for_all(void) struct socket *sock = NULL; int result = -EINVAL; struct connection *con = nodeid2con(0, GFP_NOFS); - int one = 1; if (!con) return -ENOMEM; @@ -1311,10 +1308,7 @@ static int sctp_listen_for_all(void) } sock_set_rcvbuf(sock->sk, NEEDED_RMEM); - result = kernel_setsockopt(sock, SOL_SCTP, SCTP_NODELAY, (char *)&one, - sizeof(one)); - if (result < 0) - log_print("Could not set SCTP NODELAY error %d\n", result); + sctp_sock_set_nodelay(sock->sk, true); write_lock_bh(&sock->sk->sk_callback_lock); /* Init con struct */ diff --git a/include/net/sctp/sctp.h b/include/net/sctp/sctp.h index f702b14d768ba..b505fa082f254 100644 --- a/include/net/sctp/sctp.h +++ b/include/net/sctp/sctp.h @@ -617,5 +617,6 @@ static inline bool sctp_newsk_ready(const struct sock *sk) int sctp_setsockopt_bindx(struct sock *sk, struct sockaddr *kaddrs, int addrs_size, int op); +void sctp_sock_set_nodelay(struct sock *sk, bool val); #endif /* __net_sctp_h__ */ diff --git a/net/sctp/socket.c b/net/sctp/socket.c index 30c981d9f6158..64c395f7a86d5 100644 --- a/net/sctp/socket.c +++ b/net/sctp/socket.c @@ -3066,6 +3066,14 @@ static int sctp_setsockopt_nodelay(struct sock *sk, char __user *optval, return 0; } +void sctp_sock_set_nodelay(struct sock *sk, bool val) +{ + lock_sock(sk); + sctp_sk(sk)->nodelay = val; + release_sock(sk); +} +EXPORT_SYMBOL(sctp_sock_set_nodelay); + /* * * 7.1.1 SCTP_RTOINFO