From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 15028C433F5 for ; Wed, 23 Mar 2022 12:19:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242098AbiCWMUi (ORCPT ); Wed, 23 Mar 2022 08:20:38 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36384 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241232AbiCWMUf (ORCPT ); Wed, 23 Mar 2022 08:20:35 -0400 Received: from mail-pg1-x52a.google.com (mail-pg1-x52a.google.com [IPv6:2607:f8b0:4864:20::52a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A809B6FA01 for ; Wed, 23 Mar 2022 05:19:05 -0700 (PDT) Received: by mail-pg1-x52a.google.com with SMTP id s72so966829pgc.5 for ; Wed, 23 Mar 2022 05:19:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel-dk.20210112.gappssmtp.com; s=20210112; h=message-id:date:mime-version:user-agent:subject:content-language:to :references:cc:from:in-reply-to:content-transfer-encoding; bh=B5eLCL36NYw/oaCAy7BwB1k2vxjlIgP2L6gnk+5PM+w=; b=AgzKJOcIa7lmEYrEZmb8gO5PFNS86uCtEwssFfGTSgpX+W+MVOPT2990nPYqgNCPSg WazesvQOyy/KWNpmTmkzQwGja/IypBCD19DU/nGQZ9nMQTwXD++1jki3O+iCP6M/TPej c0m2mHxJ4NRzW9QdCtmPb8smcz7L0iYiAzzimFyc8a4H9Mjze3MAN5c1ttGke3rH6jA0 UCKlYQlLGhGY0cHCzwxvT2klgTQedOXmFWB/RAIJZ6si7i99MZvZuDuDi5c+97jHN5oS IUIkxbFHMFPHg6IO/xr+Fnvx5gfB+jJNIDCvT4Cq3Am5J6+AEtCqMIer8GdrYpFWDzNX KhOQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:message-id:date:mime-version:user-agent:subject :content-language:to:references:cc:from:in-reply-to :content-transfer-encoding; bh=B5eLCL36NYw/oaCAy7BwB1k2vxjlIgP2L6gnk+5PM+w=; b=JU7hdUs36kA75Prc8rGjjvX3igywORpxWFe6utBdVhU8FF22Fn/T+twx6K8cj85can WlgXXjHN+s2NdfmCkdrVQbHiP61UJ6nEU+O7EZrGkZ3AffptVNeiuaP8j1roD/EwweFt LyYqkNapTXYwSVnJRaOGjCXU06fFfd+CJx73UrAJT1OM4eQuyz/zBIcKK156/tZRCTCV noATEw4Eo5kRYoxFa8fD1UV+nE/fmUZmRBWapO92XytAywUeCXlOruQa6czLQC8609Hf SrsGXu3okaqEjn31FnSJXiKbIOMJFtNqnVAqhC10Cz+P+vOMgPaTLTyLXGwflURHa34P QwUg== X-Gm-Message-State: AOAM533hUzLs46ebXIuHTeNPKArzHn9tuUWhmLyNrQ6ftOVxdigxZyfa Q8cxZ0CCy3y1AAaOw9yCW6yZ/A== X-Google-Smtp-Source: ABdhPJx1i/SA5mqfLaoa5GFRdvsxuF920HgBhNL/+DR1yaAXnnOWXivQLRoX5SNa+0qn92cI42JhYw== X-Received: by 2002:a63:5c03:0:b0:382:70fa:4294 with SMTP id q3-20020a635c03000000b0038270fa4294mr13600823pgb.580.1648037945064; Wed, 23 Mar 2022 05:19:05 -0700 (PDT) Received: from [192.168.1.100] ([198.8.77.157]) by smtp.gmail.com with ESMTPSA id m19-20020a17090ab79300b001c5ddc6ff21sm5777042pjr.8.2022.03.23.05.19.04 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 23 Mar 2022 05:19:04 -0700 (PDT) Message-ID: <7e6f6467-6ac2-3926-9d7b-09f52f751481@kernel.dk> Date: Wed, 23 Mar 2022 06:19:03 -0600 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux aarch64; rv:91.0) Gecko/20100101 Thunderbird/91.7.0 Subject: Re: io_uring_enter() with opcode IORING_OP_RECV ignores MSG_WAITALL in msg_flags Content-Language: en-US To: Constantine Gavrilov , "linux-kernel@vger.kernel.org" References: Cc: io-uring From: Jens Axboe In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 3/23/22 4:31 AM, Constantine Gavrilov wrote: > I get partial receives on TCP socket, even though I specify > MSG_WAITALL with IORING_OP_RECV opcode. Looking at tcpdump in > wireshark, I see entire reassambled packet (+4k), so it is not a > disconnect. The MTU is smaller than 4k. > > From the mailing list history, looks like this was discussed before > and it seems the fix was supposed to be in. Can someone clarify the > expected behavior? > > I do not think rsvmsg() has this issue. Do you have a test case? I added the io-uring list, that's the appropriate forum for this kind of discussion. -- Jens Axboe