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=-6.0 required=3.0 tests=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 18984C433E0 for ; Mon, 29 Jun 2020 10:51:31 +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 D005223884 for ; Mon, 29 Jun 2020 10:51:30 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D005223884 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]:34692 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jprNq-0003ra-3N for qemu-devel@archiver.kernel.org; Mon, 29 Jun 2020 06:51:30 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:37746) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jprN6-0003Qb-Vk for qemu-devel@nongnu.org; Mon, 29 Jun 2020 06:50:44 -0400 Received: from indium.canonical.com ([91.189.90.7]:35562) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1jprN4-0004HU-5l for qemu-devel@nongnu.org; Mon, 29 Jun 2020 06:50:44 -0400 Received: from loganberry.canonical.com ([91.189.90.37]) by indium.canonical.com with esmtp (Exim 4.86_2 #2 (Debian)) id 1jprN2-0005BD-5Q for ; Mon, 29 Jun 2020 10:50:40 +0000 Received: from loganberry.canonical.com (localhost [127.0.0.1]) by loganberry.canonical.com (Postfix) with ESMTP id 211E22E810B for ; Mon, 29 Jun 2020 10:50:40 +0000 (UTC) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Date: Mon, 29 Jun 2020 10:43:08 -0000 From: Stefan Hajnoczi <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: martingrigorov stefanha X-Launchpad-Bug-Reporter: Martin Grigorov (martingrigorov) X-Launchpad-Bug-Modifier: Stefan Hajnoczi (stefanha) References: <159289799812.6175.17000319886186623286.malonedeb@soybean.canonical.com> Message-ID: <20200629104308.GG31392@stefanha-x1.localdomain> Subject: Re: [Bug 1884719] [NEW] 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="1cbd0aa39df153c901321817f9b57cf3f232b507"; Instance="production-secrets-lazr.conf" X-Launchpad-Hash: d27b45d8b01f0505f72c03fca270b392e733c6b1 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 = 2020/06/29 06:50:40 X-ACL-Warn: Detected OS = Linux 3.11 and newer [fuzzy] X-Spam_score_int: -58 X-Spam_score: -5.9 X-Spam_bar: ----- X-Spam_report: (-5.9 / 5.0 requ) BAYES_00=-1.9, HEADER_FROM_DIFFERENT_DOMAINS=1, RCVD_IN_DNSWL_HI=-5, RCVD_IN_MSPIKE_H3=-0.01, RCVD_IN_MSPIKE_WL=-0.01, SPF_HELO_NONE=0.001, SPF_NONE=0.001 autolearn=_AUTOLEARN 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" Message-ID: <20200629104308.uc6SbUVpdU28Dou_LGkbYCGvn8ALLUA42fffPQrWJQU@z> On Tue, Jun 23, 2020 at 07:39:58AM -0000, Martin Grigorov wrote: > Public bug reported: CCing Filip and Laurent, who may be interested in adding Linux AIO syscalls to qemu-user. > = > 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 > = > ** Affects: qemu > Importance: Undecided > Status: New > = > -- = > 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-u= ser-static, i.e. Docker+QEMU. = > I understand that I do not use plain QEMU and you may count this report= as a "distribution of QEMU"! Just let me know what are the steps to test i= t 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(siz= eof(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 o= n x86_64 Docker image (e.g. centos:8) it prints `res is: 0`, i.e. it succes= sfully 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/b= lob/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-o= pt 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 li= baio on QEMU. > = > Thank you! > Martin > = > To manage notifications about this bug go to: > https://bugs.launchpad.net/qemu/+bug/1884719/+subscriptions > -- = 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