From patchwork Mon Nov 30 18:51:58 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?b?QmrDtnJuIFTDtnBlbA==?= X-Patchwork-Id: 11941159 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=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 A5953C63777 for ; Mon, 30 Nov 2020 18:54:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4FCB822210 for ; Mon, 30 Nov 2020 18:54:14 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="f/N8v4Hy" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729545AbgK3Sxa (ORCPT ); Mon, 30 Nov 2020 13:53:30 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60692 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727994AbgK3Sx3 (ORCPT ); Mon, 30 Nov 2020 13:53:29 -0500 Received: from mail-pg1-x541.google.com (mail-pg1-x541.google.com [IPv6:2607:f8b0:4864:20::541]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7F141C0613D4; Mon, 30 Nov 2020 10:52:49 -0800 (PST) Received: by mail-pg1-x541.google.com with SMTP id l4so4555164pgu.5; Mon, 30 Nov 2020 10:52:49 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=ROQPewlDIZikhUQm8VWG2wYdta6lahk0LWlwgo5VsUU=; b=f/N8v4HywGPMyIs5jYMKdayJDHXJ+XxuqdxmWZ8SBOcSkyoYPFe7FzSxb3WREwvkPQ rjDZi2+M7F1V9OWwRmSn/SxyWOpeT80yTWUG1FNfOYqzsp5Vi+DbYolDNvsHOnl3swSx ClQPvYGUsCLhQAHAzGVUKMfcdbn2sxIFvssiPts5gi9GQuvSy+znDPjI/z9VCjo+U439 ZhIJMwLSatlxAdi4jdOdl09pfBX2bVNck8Bgr1MRpQkNg8LNt2AloRO9N0Mgcry/rGA7 7/vdeDeYVIAfjq6w1GVxhfx8ZPaMjVoBL6S3A8Nmfq93WAEZCsDTDBuIoqtdwzcytZE9 4jug== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=ROQPewlDIZikhUQm8VWG2wYdta6lahk0LWlwgo5VsUU=; b=AsKgYTjDArXdMv6wBhcYvz3vvUlbkWeZIbI9reXa30eS7j3C1XIn2wP1pz+/giZOIU BaglR6YvR4mhwPEBEoSS5+iBPJJz4Vk88TavCv/ywQQ2RKr/xe37e+2tKF/81nR1lnwi Be/1c4Aba1zPYaV9LfcjeNRIXdps3Hxgeigcj10ZEVDaTvFLwkf2Y5EDy+6aUbPn5fwu ZUVcSzi4MGyP0XIHvr7p0sacp4L2FEuhygqLQBfrIu+vxQs2/cUbtfuj/Bdut99tIRKk yZZjXTr5IIIR9wM535w++83pe1AcJgnpH3hDRKbgFR4Cn6VTuVIVIjI8ZZKzTVoZ7VdN zoJw== X-Gm-Message-State: AOAM532z769rIEGf+bG/EWfjYUW6f9lJUfxKV+BoYi6r+m3Wmj3kqwge jdu8viFkwwdj6yU05CGHocyzgI9k0oS4V1/i X-Google-Smtp-Source: ABdhPJxwGTC1uc2X1fuPER+0GYkFTroSL/pkerjOYqTcT4Mdjjs64SYS1bLFcZlbnP52+MoF5biX8g== X-Received: by 2002:a63:5f49:: with SMTP id t70mr13091194pgb.288.1606762368611; Mon, 30 Nov 2020 10:52:48 -0800 (PST) Received: from btopel-mobl.ger.intel.com ([192.55.55.41]) by smtp.gmail.com with ESMTPSA id i3sm12005978pgq.12.2020.11.30.10.52.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 30 Nov 2020 10:52:47 -0800 (PST) From: =?utf-8?b?QmrDtnJuIFTDtnBlbA==?= To: netdev@vger.kernel.org, bpf@vger.kernel.org Cc: =?utf-8?b?QmrDtnJuIFTDtnBlbA==?= , magnus.karlsson@intel.com, ast@kernel.org, daniel@iogearbox.net, maciej.fijalkowski@intel.com, sridhar.samudrala@intel.com, jesse.brandeburg@intel.com, qi.z.zhang@intel.com, kuba@kernel.org, edumazet@google.com, jonathan.lemon@gmail.com, maximmi@nvidia.com Subject: [PATCH bpf-next v4 03/10] xsk: add support for recvmsg() Date: Mon, 30 Nov 2020 19:51:58 +0100 Message-Id: <20201130185205.196029-4-bjorn.topel@gmail.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20201130185205.196029-1-bjorn.topel@gmail.com> References: <20201130185205.196029-1-bjorn.topel@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org X-Patchwork-Delegate: bpf@iogearbox.net From: Björn Töpel Add support for non-blocking recvmsg() to XDP sockets. Previously, only sendmsg() was supported by XDP socket. Now, for symmetry and the upcoming busy-polling support, recvmsg() is added. Acked-by: Magnus Karlsson Signed-off-by: Björn Töpel --- net/xdp/xsk.c | 22 +++++++++++++++++++++- 1 file changed, 21 insertions(+), 1 deletion(-) diff --git a/net/xdp/xsk.c b/net/xdp/xsk.c index 3e33cb6e68e6..1d1e0cd51a95 100644 --- a/net/xdp/xsk.c +++ b/net/xdp/xsk.c @@ -531,6 +531,26 @@ static int xsk_sendmsg(struct socket *sock, struct msghdr *m, size_t total_len) return __xsk_sendmsg(sk); } +static int xsk_recvmsg(struct socket *sock, struct msghdr *m, size_t len, int flags) +{ + bool need_wait = !(flags & MSG_DONTWAIT); + struct sock *sk = sock->sk; + struct xdp_sock *xs = xdp_sk(sk); + + if (unlikely(!(xs->dev->flags & IFF_UP))) + return -ENETDOWN; + if (unlikely(!xs->rx)) + return -ENOBUFS; + if (unlikely(!xsk_is_bound(xs))) + return -ENXIO; + if (unlikely(need_wait)) + return -EOPNOTSUPP; + + if (xs->pool->cached_need_wakeup & XDP_WAKEUP_RX && xs->zc) + return xsk_wakeup(xs, XDP_WAKEUP_RX); + return 0; +} + static __poll_t xsk_poll(struct file *file, struct socket *sock, struct poll_table_struct *wait) { @@ -1191,7 +1211,7 @@ static const struct proto_ops xsk_proto_ops = { .setsockopt = xsk_setsockopt, .getsockopt = xsk_getsockopt, .sendmsg = xsk_sendmsg, - .recvmsg = sock_no_recvmsg, + .recvmsg = xsk_recvmsg, .mmap = xsk_mmap, .sendpage = sock_no_sendpage, };