From patchwork Wed Nov 25 06:48:56 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xuan Zhuo X-Patchwork-Id: 11930433 X-Patchwork-Delegate: bpf@iogearbox.net 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,UNPARSEABLE_RELAY,USER_AGENT_GIT autolearn=unavailable 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 BEE42C56201 for ; Wed, 25 Nov 2020 06:49:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7E74720DD4 for ; Wed, 25 Nov 2020 06:49:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727011AbgKYGtC (ORCPT ); Wed, 25 Nov 2020 01:49:02 -0500 Received: from out30-56.freemail.mail.aliyun.com ([115.124.30.56]:43647 "EHLO out30-56.freemail.mail.aliyun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726314AbgKYGtC (ORCPT ); Wed, 25 Nov 2020 01:49:02 -0500 X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R821e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e04395;MF=xuanzhuo@linux.alibaba.com;NM=1;PH=DS;RN=18;SR=0;TI=SMTPD_---0UGUMiM2_1606286938; Received: from localhost(mailfrom:xuanzhuo@linux.alibaba.com fp:SMTPD_---0UGUMiM2_1606286938) by smtp.aliyun-inc.com(127.0.0.1); Wed, 25 Nov 2020 14:48:59 +0800 From: Xuan Zhuo To: magnus.karlsson@gmail.com Cc: =?utf-8?b?QmrDtnJuIFTDtnBlbA==?= , Magnus Karlsson , Jonathan Lemon , "David S. Miller" , Jakub Kicinski , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , Martin KaFai Lau , Song Liu , Yonghong Song , Andrii Nakryiko , KP Singh , netdev@vger.kernel.org (open list:XDP SOCKETS (AF_XDP)), bpf@vger.kernel.org (open list:XDP SOCKETS (AF_XDP)), linux-kernel@vger.kernel.org (open list) Subject: [PATCH bpf v2 1/2] xsk: replace datagram_poll by sock_poll_wait Date: Wed, 25 Nov 2020 14:48:56 +0800 Message-Id: <01f59423cad1b634fe704fe238a0038fd74df3ba.1606285978.git.xuanzhuo@linux.alibaba.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: References: In-Reply-To: References: Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org X-Patchwork-Delegate: bpf@iogearbox.net datagram_poll will judge the current socket status (EPOLLIN, EPOLLOUT) based on the traditional socket information (eg: sk_wmem_alloc), but this does not apply to xsk. So this patch uses sock_poll_wait instead of datagram_poll, and the mask is calculated by xsk_poll. Signed-off-by: Xuan Zhuo Acked-by: Magnus Karlsson --- net/xdp/xsk.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/net/xdp/xsk.c b/net/xdp/xsk.c index b014197..0df8651 100644 --- a/net/xdp/xsk.c +++ b/net/xdp/xsk.c @@ -534,11 +534,13 @@ static int xsk_sendmsg(struct socket *sock, struct msghdr *m, size_t total_len) static __poll_t xsk_poll(struct file *file, struct socket *sock, struct poll_table_struct *wait) { - __poll_t mask = datagram_poll(file, sock, wait); + __poll_t mask = 0; struct sock *sk = sock->sk; struct xdp_sock *xs = xdp_sk(sk); struct xsk_buff_pool *pool; + sock_poll_wait(file, sock, wait); + if (unlikely(!xsk_is_bound(xs))) return mask;