From patchwork Tue May 15 19:48:12 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 10401923 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 53607601F7 for ; Tue, 15 May 2018 19:57:45 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 42FC928470 for ; Tue, 15 May 2018 19:57:45 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 37FE628477; Tue, 15 May 2018 19:57:45 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI, T_DKIM_INVALID autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id B1DF428470 for ; Tue, 15 May 2018 19:57:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752638AbeEOT53 (ORCPT ); Tue, 15 May 2018 15:57:29 -0400 Received: from bombadil.infradead.org ([198.137.202.133]:42252 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752697AbeEOTtX (ORCPT ); Tue, 15 May 2018 15:49:23 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=References:In-Reply-To:Message-Id: Date:Subject:Cc:To:From:Sender:Reply-To:MIME-Version:Content-Type: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=GphW0rfg2yRos++J2WZcDsC0d0XbeTKPWinFWFN0qao=; b=TGO0KdkU0Bh4zQor9/fBKvjlo bFDj1DwjsHHoxWqCVwnUh6Zc0fcA+psUvJSZcvdZ0ahgLMzLjaRIcSC82DjKK0y/NWkcS+5W1FXTL lHtF/Gb55uWnCgRdpiRgTT6WB3Djl2mWzsc7bcjJ4ar0hzRPDHUOO5oiznabMq6AxXUmIVWJRDX/U vfureM7fRCMqWXI8zjfsW6nxoqM+KKgqfUohDK3cmG1+9HIr8XkaIISNll8b0nP89bKTazEyVqGYN b/OR/Xt4klnK/89Om9dGHeca9PF3UKEVlJrDwJ7UmtDfVl3TGPGvepNVlTwlF7dwNgR5SYtcf559r SBmOVTgGA==; Received: from 089144199016.atnat0008.highway.a1.net ([89.144.199.16] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.90_1 #2 (Red Hat Linux)) id 1fIfwo-0000Uh-6v; Tue, 15 May 2018 19:49:22 +0000 From: Christoph Hellwig To: viro@zeniv.linux.org.uk Cc: Avi Kivity , linux-aio@kvack.org, linux-fsdevel@vger.kernel.org, netdev@vger.kernel.org, linux-api@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 11/32] net: refactor socket_poll Date: Tue, 15 May 2018 21:48:12 +0200 Message-Id: <20180515194833.6906-12-hch@lst.de> X-Mailer: git-send-email 2.17.0 In-Reply-To: <20180515194833.6906-1-hch@lst.de> References: <20180515194833.6906-1-hch@lst.de> X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Factor out two busy poll related helpers for late reuse, and remove a command that isn't very helpful, especially with the __poll_t annotations in place. Signed-off-by: Christoph Hellwig --- include/net/busy_poll.h | 15 +++++++++++++++ net/socket.c | 21 ++++----------------- 2 files changed, 19 insertions(+), 17 deletions(-) diff --git a/include/net/busy_poll.h b/include/net/busy_poll.h index 71c72a939bf8..c5187438af38 100644 --- a/include/net/busy_poll.h +++ b/include/net/busy_poll.h @@ -121,6 +121,21 @@ static inline void sk_busy_loop(struct sock *sk, int nonblock) #endif } +static inline void sock_poll_busy_loop(struct socket *sock, __poll_t events) +{ + if (sk_can_busy_loop(sock->sk) && + events && (events & POLL_BUSY_LOOP)) { + /* once, only if requested by syscall */ + sk_busy_loop(sock->sk, 1); + } +} + +/* if this socket can poll_ll, tell the system call */ +static inline __poll_t sock_poll_busy_flag(struct socket *sock) +{ + return sk_can_busy_loop(sock->sk) ? POLL_BUSY_LOOP : 0; +} + /* used in the NIC receive handler to mark the skb */ static inline void skb_mark_napi_id(struct sk_buff *skb, struct napi_struct *napi) diff --git a/net/socket.c b/net/socket.c index f10f1d947c78..571ee4005192 100644 --- a/net/socket.c +++ b/net/socket.c @@ -1117,24 +1117,11 @@ EXPORT_SYMBOL(sock_create_lite); /* No kernel lock held - perfect */ static __poll_t sock_poll(struct file *file, poll_table *wait) { - __poll_t busy_flag = 0; - struct socket *sock; - - /* - * We can't return errors to poll, so it's either yes or no. - */ - sock = file->private_data; - - if (sk_can_busy_loop(sock->sk)) { - /* this socket can poll_ll so tell the system call */ - busy_flag = POLL_BUSY_LOOP; - - /* once, only if requested by syscall */ - if (wait && (wait->_key & POLL_BUSY_LOOP)) - sk_busy_loop(sock->sk, 1); - } + struct socket *sock = file->private_data; + __poll_t events = poll_requested_events(wait); - return busy_flag | sock->ops->poll(file, sock, wait); + sock_poll_busy_loop(sock, events); + return sock->ops->poll(file, sock, wait) | sock_poll_busy_flag(sock); } static int sock_mmap(struct file *file, struct vm_area_struct *vma)