From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Cyrus-Session-Id: sloti22d1t05-2348587-1516652602-2-7849120305416123725 X-Sieve: CMU Sieve 3.0 X-Spam-known-sender: no X-Spam-score: 0.0 X-Spam-hits: BAYES_00 -1.9, HEADER_FROM_DIFFERENT_DOMAINS 0.25, RCVD_IN_DNSWL_HI -5, T_RP_MATCHES_RCVD -0.01, LANGUAGES unknown, BAYES_USED global, SA_VERSION 3.4.0 X-Spam-source: IP='209.132.180.67', Host='vger.kernel.org', Country='US', FromHeader='de', MailFrom='org' X-Spam-charsets: X-Resolved-to: greg@kroah.com X-Delivered-to: greg@kroah.com X-Mail-from: linux-api-owner@vger.kernel.org ARC-Seal: i=1; a=rsa-sha256; cv=none; d=messagingengine.com; s=arctest; t=1516652602; b=FO5bnmfux5hD3IFeXSR0YADOL7U36wjQn5NffqSLEL4kMgl umbKIUPrTileq4IEJ9n8OZk4XWABYZH2IElLdVAXD2UCQ0fa0s7/2tRF2qIWxI7B wdVFCPVZQi//b/SbC4dXWoQ/EuVnV1D9OAqeGB15h+MrXxhkOesyCax+f9yklm+k Ll+D99QggIXjJxBPwvzwBmtZuWnhmW+uT/SPemkuwT/L+bImX1Uf59lKDv70tZ8y bg5WEuWIIU3VRneRJUbsFxlkdQrLwGI+xfbhbkXX8E4l7Wo6pWESDyBlyunHdaQT rT56Pc55Gixo3M6LL7WU7IFnfuNoYm1cEkZ0xxg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=from:to:cc:subject:date:message-id :in-reply-to:references:sender:list-id; s=arctest; t=1516652602; bh=+f76z7ZngV3Djz15XjWGq0rkJ/1Kw/2rQh9b79LEXXM=; b=wBMspcx/4B1x JsBZacmvANtMVoOWrnahwjEs9PMWMQXYdzgzSH0wpiB2p41ZkwobCnvWc8rNgXXU lo6WJkkAga0d+D9f08noWihViagGtNChPm6N3Q5fsg0mJKBTiklxKL3Z0BPDFaBE syF+j1/2a7GvhMFjCEMIVX4KL445KK3jUuVN/SQA1BtZdB2E1FHLDMlR0Zp26GQr opC5TU+HWXRthtCBaFzjssdljeTkP//IaieD+iaWNJ0ELeZjhPzpizYLCX2G9Fou iRjAfy0baVERgyBlIudFyBk73IRpe6YJF/OOTHMq3Wl/lLtWx/f8qgqeQEuzMkMX mt9qaqJkFg== ARC-Authentication-Results: i=1; mx2.messagingengine.com; arc=none (no signatures found); dkim=fail (message has been altered; 2048-bit rsa key sha256) header.d=infradead.org header.i=@infradead.org header.b=Oltbx93W x-bits=2048 x-keytype=rsa x-algorithm=sha256 x-selector=bombadil.20170209; dmarc=none (p=none,has-list-id=yes,d=none) header.from=lst.de; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); spf=none smtp.mailfrom=linux-api-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=fail; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=lst.de header.result=pass header_is_org_domain=yes Authentication-Results: mx2.messagingengine.com; arc=none (no signatures found); dkim=fail (message has been altered; 2048-bit rsa key sha256) header.d=infradead.org header.i=@infradead.org header.b=Oltbx93W x-bits=2048 x-keytype=rsa x-algorithm=sha256 x-selector=bombadil.20170209; dmarc=none (p=none,has-list-id=yes,d=none) header.from=lst.de; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); spf=none smtp.mailfrom=linux-api-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=fail; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=lst.de header.result=pass header_is_org_domain=yes Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751546AbeAVUNj (ORCPT ); Mon, 22 Jan 2018 15:13:39 -0500 Received: from bombadil.infradead.org ([65.50.211.133]:56957 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750878AbeAVUNh (ORCPT ); Mon, 22 Jan 2018 15:13:37 -0500 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 15/36] net: refactor socket_poll Date: Mon, 22 Jan 2018 21:12:22 +0100 Message-Id: <20180122201243.31610-16-hch@lst.de> X-Mailer: git-send-email 2.14.2 In-Reply-To: <20180122201243.31610-1-hch@lst.de> References: <20180122201243.31610-1-hch@lst.de> X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-api-owner@vger.kernel.org X-Mailing-List: linux-api@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: 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 092baa464afc..db11e48a375b 100644 --- a/net/socket.c +++ b/net/socket.c @@ -1097,24 +1097,11 @@ 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) -- 2.14.2