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 X-Spam-Level: X-Spam-Status: No, score=-8.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS 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 DB909C433E1 for ; Mon, 24 Aug 2020 13:41:45 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id B1C79204FD for ; Mon, 24 Aug 2020 13:41:45 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B1C79204FD Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=bugs.launchpad.net Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:53730 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kACjI-0003we-RK for qemu-devel@archiver.kernel.org; Mon, 24 Aug 2020 09:41:44 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:57270) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kACil-0003XH-8o for qemu-devel@nongnu.org; Mon, 24 Aug 2020 09:41:11 -0400 Received: from indium.canonical.com ([91.189.90.7]:40640) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1kACii-0004Zl-QX for qemu-devel@nongnu.org; Mon, 24 Aug 2020 09:41:10 -0400 Received: from loganberry.canonical.com ([91.189.90.37]) by indium.canonical.com with esmtp (Exim 4.86_2 #2 (Debian)) id 1kACig-0002gb-VI for ; Mon, 24 Aug 2020 13:41:06 +0000 Received: from loganberry.canonical.com (localhost [127.0.0.1]) by loganberry.canonical.com (Postfix) with ESMTP id EB77F2E80D2 for ; Mon, 24 Aug 2020 13:41:06 +0000 (UTC) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Date: Mon, 24 Aug 2020 13:33:39 -0000 From: Martin Grigorov <1884719@bugs.launchpad.net> To: qemu-devel@nongnu.org X-Launchpad-Notification-Type: bug X-Launchpad-Bug: product=qemu; status=New; importance=Undecided; assignee=None; X-Launchpad-Bug-Information-Type: Public X-Launchpad-Bug-Private: no X-Launchpad-Bug-Security-Vulnerability: no X-Launchpad-Bug-Commenters: laurent-vivier martingrigorov stefanha X-Launchpad-Bug-Reporter: Martin Grigorov (martingrigorov) X-Launchpad-Bug-Modifier: Martin Grigorov (martingrigorov) References: <159289799812.6175.17000319886186623286.malonedeb@soybean.canonical.com> Message-Id: <159827601927.811.12115098261936323638.malone@wampee.canonical.com> Subject: [Bug 1884719] Re: Function not implemented when using libaio X-Launchpad-Message-Rationale: Subscriber (QEMU) @qemu-devel-ml X-Launchpad-Message-For: qemu-devel-ml Precedence: bulk X-Generated-By: Launchpad (canonical.com); Revision="99c2d833c8d727fd05148486920aca032e908071"; Instance="production" X-Launchpad-Hash: cdc53b0f06fb2e59fb027e7ba6931faefe22e21a Received-SPF: none client-ip=91.189.90.7; envelope-from=bounces@canonical.com; helo=indium.canonical.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/08/24 09:41:07 X-ACL-Warn: Detected OS = Linux 3.11 and newer [fuzzy] X-Spam_score_int: -65 X-Spam_score: -6.6 X-Spam_bar: ------ X-Spam_report: (-6.6 / 5.0 requ) BAYES_00=-1.9, HEADER_FROM_DIFFERENT_DOMAINS=0.249, RCVD_IN_DNSWL_HI=-5, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_NONE=0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: Bug 1884719 <1884719@bugs.launchpad.net> Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Hey Laurent! I know it is the summer holidays season! I just wanted to ask you whether I should test your branch or you have more= planned work ? -- = You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1884719 Title: Function not implemented when using libaio Status in QEMU: New Bug description: Hello I experience "Function not implemented" errors when trying to use Linux libaio library in foreign architecture, e.g. aarch64. I've faced this problem while using https://github.com/multiarch/qemu-use= r-static, i.e. Docker+QEMU. = I understand that I do not use plain QEMU and you may count this report a= s a "distribution of QEMU"! Just let me know what are the steps to test it = with plain QEMU and I will test and update this ticket! = Here are the steps to reproduce the issue: 1) On x86_64 machine register QEMU: `docker run -it --rm --privileged multiarch/qemu-user-static --reset --credential yes --persistent yes` 2) Start a Docker image with foreign CPU architecture, e.g. aarch64 `docker run -it arm64v8/centos:8 bash` 3) Inside the Docker container install GCC and libaio `yum install gcc libaio libaio-devel` 4) Compile the following C program ``` #include #include #include #include struct io_control { io_context_t ioContext; }; int main() { int queueSize =3D 10; struct io_control * theControl =3D (struct io_control *) malloc(sizeo= f(struct io_control)); if (theControl =3D=3D NULL) { printf("theControl is NULL"); return 123; } int res =3D io_queue_init(queueSize, &theControl->ioContext); io_queue_release(theControl->ioContext); free(theControl); printf("res is: %d", res); } ``` ``` cat > test.c [PASTE THE CODE ABOVE HERE] ^D ``` `gcc test.c -o out -laio && ./out` = When executed directly on aarch64 machine (i.e. without emulation) or on = x86_64 Docker image (e.g. centos:8) it prints `res is: 0`, i.e. it successf= ully initialized a LibAIO queue. But when executed on Docker image with foreign/emulated CPU architecture it prints `res is: -38` (ENOSYS). `man io_queue_init` says that error ENOSYS is returned when "Not implemented." Environment: QEMU version: 5.0.0.2 (https://github.com/multiarch/qemu-user-static/blo= b/master/.travis.yml#L24-L28) Container application: Docker Output of `docker --version`: ``` Client: Version: 19.03.8 API version: 1.40 Go version: go1.13.8 Git commit: afacb8b7f0 Built: Wed Mar 11 23:42:35 2020 OS/Arch: linux/amd64 Experimental: false Server: Engine: Version: 19.03.8 API version: 1.40 (minimum version 1.12) Go version: go1.13.8 Git commit: afacb8b7f0 Built: Wed Mar 11 22:48:33 2020 OS/Arch: linux/amd64 Experimental: false containerd: Version: 1.3.3-0ubuntu2 GitCommit: = runc: Version: spec: 1.0.1-dev GitCommit: = docker-init: Version: 0.18.0 GitCommit: = ``` Same happens with Ubuntu (arm64v8/ubuntu:focal). I've tried to `strace` it but : ``` /usr/bin/strace: ptrace(PTRACE_TRACEME, ...): Function not implemented /usr/bin/strace: PTRACE_SETOPTIONS: Function not implemented /usr/bin/strace: detach: waitpid(112): No child processes /usr/bin/strace: Process 112 detached ``` Here are the steps to reproduce the problem with strace: ``` docker run --rm -it --security-opt seccomp:unconfined --security-opt= apparmor:unconfined --privileged --cap-add ALL arm64v8/centos:8 bash yum install -y strace` strace echo Test ``` Note: I used --privileged, disabled seccomp and apparmor, and added all capabilities Disabling security solves the "Permission denied" problem but then comes the "Not implemented" one. = Any idea what could be the problem and how to work it around ? I've googled a lot but I wasn't able to find any problems related to liba= io on QEMU. Thank you! Martin To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1884719/+subscriptions