From patchwork Tue Mar 2 02:37:38 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cong Wang X-Patchwork-Id: 12111201 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=-15.7 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 0F137C4332D for ; Tue, 2 Mar 2021 08:50:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D1FF264DE8 for ; Tue, 2 Mar 2021 08:50:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1377945AbhCBIph (ORCPT ); Tue, 2 Mar 2021 03:45:37 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54810 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1443989AbhCBCim (ORCPT ); Mon, 1 Mar 2021 21:38:42 -0500 Received: from mail-ot1-x332.google.com (mail-ot1-x332.google.com [IPv6:2607:f8b0:4864:20::332]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0AD8FC061794; Mon, 1 Mar 2021 18:38:00 -0800 (PST) Received: by mail-ot1-x332.google.com with SMTP id v12so17502035ott.10; Mon, 01 Mar 2021 18:38:00 -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=GiB0NEAUfxf9GywTLDDCuaFjXeli5Cn9ox8fpeP4HHI=; b=WblbCjmTRubjTckCQ7GDNDx90zL0hklQRWqJhEtl1TlQe4ESx831lDFHR701MC1wBy Ii7Uzq2Rq+6MQbYC65UJsVzRp9nr9ogf9TtkShKZrK1KxjpSXP6dPQ9nJMrIDKWJQxR8 NQo2s5AgcEVBP0mqD6ESBG6S4bjqdCQLsn0HY81LVcv3YXnhwZr6uHbmw2xUjFbRSLB6 PgsnwMJMG/BqXojWEKH+FKlMf4eLU266gFgTf3/y1W+KRccaXaUPBkAAAsREPMbWEtdI 7u5aAGVf6UXK7RWUUXiBPktbqT9Ssau/t/BtJNYFq2e2HbM5YcmQDsSwRfCKlTRe11ZU 3lbA== 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=GiB0NEAUfxf9GywTLDDCuaFjXeli5Cn9ox8fpeP4HHI=; b=kM3zw2lLb/Jqmt6e4cPw6ytcwJYSUVGDDgoxg3oCPbAHmZXbUINXhp+SIPG2X0WJrE 2oPmgj0VyewE+6IoT0l+GZuEADoATk7Hj0lpy6qF9hx5hVz/Ujs9CZEX0fQ1KPOZpUGs ebKsXN+JECb8zZsn7TFZDqWg+iATC77A+EgUvTSoOAXISJUi18jUYo/PJyEkX12OFmaG +lJphcfMl1JBKYam9by/dTwewj2D/idDZPx/xLRTvCgCJhMaJzZxj2ZewvCZUNeTMtjr Nm80a5E0b7y3zPOj/XKy6VaTnEZLB4MOlx4/hNhGbYdhT87zmbrBUeOASBpclMGHbjee 5fpg== X-Gm-Message-State: AOAM533GyGvQsQAt5o5Qc2qaDrFi1ygNl2QT53UjvrGDCFcXlIsCHkzV BWktRPaZHoOmmL7ermvhNVJUzCe26Twrrg== X-Google-Smtp-Source: ABdhPJxtpkUitb0hkxcYiK7vaF8MpDkNE11YfGGPXUZwMGLLjg6JsbMhop2W7PTssiu8mNRXS5BnAQ== X-Received: by 2002:a9d:340b:: with SMTP id v11mr14334996otb.284.1614652679217; Mon, 01 Mar 2021 18:37:59 -0800 (PST) Received: from unknown.attlocal.net ([2600:1700:65a0:ab60:1bb:8d29:39ef:5fe5]) by smtp.gmail.com with ESMTPSA id a30sm100058oiy.42.2021.03.01.18.37.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 01 Mar 2021 18:37:58 -0800 (PST) From: Cong Wang To: netdev@vger.kernel.org Cc: bpf@vger.kernel.org, duanxiongchun@bytedance.com, wangdongdong.6@bytedance.com, jiang.wang@bytedance.com, Cong Wang , John Fastabend , Daniel Borkmann , Jakub Sitnicki , Lorenz Bauer Subject: [Patch bpf-next v2 4/9] udp: implement ->read_sock() for sockmap Date: Mon, 1 Mar 2021 18:37:38 -0800 Message-Id: <20210302023743.24123-5-xiyou.wangcong@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210302023743.24123-1-xiyou.wangcong@gmail.com> References: <20210302023743.24123-1-xiyou.wangcong@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: bpf@iogearbox.net From: Cong Wang Cc: John Fastabend Cc: Daniel Borkmann Cc: Jakub Sitnicki Cc: Lorenz Bauer Signed-off-by: Cong Wang --- include/net/udp.h | 2 ++ net/ipv4/af_inet.c | 1 + net/ipv4/udp.c | 34 ++++++++++++++++++++++++++++++++++ 3 files changed, 37 insertions(+) diff --git a/include/net/udp.h b/include/net/udp.h index 5264ba1439f9..44a94cfc63b5 100644 --- a/include/net/udp.h +++ b/include/net/udp.h @@ -330,6 +330,8 @@ struct sock *__udp6_lib_lookup(struct net *net, struct sk_buff *skb); struct sock *udp6_lib_lookup_skb(const struct sk_buff *skb, __be16 sport, __be16 dport); +int udp_read_sock(struct sock *sk, read_descriptor_t *desc, + sk_read_actor_t recv_actor); /* UDP uses skb->dev_scratch to cache as much information as possible and avoid * possibly multiple cache miss on dequeue() diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c index d8c73a848c53..df8e8e238756 100644 --- a/net/ipv4/af_inet.c +++ b/net/ipv4/af_inet.c @@ -1072,6 +1072,7 @@ const struct proto_ops inet_dgram_ops = { .getsockopt = sock_common_getsockopt, .sendmsg = inet_sendmsg, .sendmsg_locked = udp_sendmsg_locked, + .read_sock = udp_read_sock, .recvmsg = inet_recvmsg, .mmap = sock_no_mmap, .sendpage = inet_sendpage, diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c index 93db853601d7..54f24b1d4f65 100644 --- a/net/ipv4/udp.c +++ b/net/ipv4/udp.c @@ -1798,6 +1798,40 @@ struct sk_buff *__skb_recv_udp(struct sock *sk, unsigned int flags, } EXPORT_SYMBOL(__skb_recv_udp); +int udp_read_sock(struct sock *sk, read_descriptor_t *desc, + sk_read_actor_t recv_actor) +{ + int copied = 0; + + while (1) { + int offset = 0, err; + struct sk_buff *skb; + + skb = __skb_recv_udp(sk, 0, 1, &offset, &err); + if (!skb) + break; + if (offset < skb->len) { + int used; + size_t len; + + len = skb->len - offset; + used = recv_actor(desc, skb, offset, len); + if (used <= 0) { + if (!copied) + copied = used; + break; + } else if (used <= len) { + copied += used; + offset += used; + } + } + if (!desc->count) + break; + } + + return copied; +} + /* * This should be easy, if there is something there we * return it, otherwise we block.