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Mon, 29 Jun 2020 12:20:39 +0000 (UTC) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Date: Mon, 29 Jun 2020 12:13:40 -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: <159343282086.1656.5257890853895072288.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="1cbd0aa39df153c901321817f9b57cf3f232b507"; Instance="production-secrets-lazr.conf" X-Launchpad-Hash: 0ab6db31628a1ee3cfa13ca905ca5b91e3a06c12 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" Executing `QEMU_STRACE=3D ./out` here gives: 259 brk(NULL) =3D 0x0000000000421000 259 uname(0x40008003d8) =3D 0 259 faccessat(AT_FDCWD,"/etc/ld.so.preload",R_OK,AT_SYMLINK_NOFOLLOW|0x50) = =3D -1 errno=3D2 (No such file or directory) 259 openat(AT_FDCWD,"/etc/ld.so.cache",O_RDONLY|O_CLOEXEC) =3D 3 259 fstat(3,0x00000040007ff960) =3D 0 259 mmap(NULL,13646,PROT_READ,MAP_PRIVATE,3,0) =3D 0x0000004000843000 259 close(3) =3D 0 259 openat(AT_FDCWD,"/lib64/libaio.so.1",O_RDONLY|O_CLOEXEC) =3D 3 259 read(3,0x7ffb20,832) =3D 832 259 fstat(3,0x00000040007ff9b0) =3D 0 259 mmap(NULL,131096,PROT_EXEC|PROT_READ,MAP_PRIVATE|MAP_DENYWRITE,3,0) =3D= 0x0000004000847000 259 mprotect(0x0000004000849000,118784,PROT_NONE) =3D 0 259 mmap(0x0000004000866000,4096,PROT_READ|PROT_WRITE,MAP_PRIVATE|MAP_DENYW= RITE|MAP_FIXED,3,0xf000) =3D 0x0000004000866000 259 mmap(0x0000004000867000,24,PROT_READ|PROT_WRITE,MAP_PRIVATE|MAP_ANONYMO= US|MAP_FIXED,-1,0) =3D 0x0000004000867000 259 close(3) =3D 0 259 openat(AT_FDCWD,"/lib64/libc.so.6",O_RDONLY|O_CLOEXEC) =3D 3 259 read(3,0x7ffb00,832) =3D 832 259 fstat(3,0x00000040007ff990) =3D 0 259 mmap(NULL,8192,PROT_READ|PROT_WRITE,MAP_PRIVATE|MAP_ANONYMOUS,-1,0) =3D= 0x0000004000868000 259 mmap(NULL,1527680,PROT_EXEC|PROT_READ,MAP_PRIVATE|MAP_DENYWRITE,3,0) = =3D 0x000000400086a000 259 mprotect(0x00000040009c3000,77824,PROT_NONE) =3D 0 259 mmap(0x00000040009d6000,24576,PROT_READ|PROT_WRITE,MAP_PRIVATE|MAP_DENY= WRITE|MAP_FIXED,3,0x15c000) =3D 0x00000040009d6000 259 mmap(0x00000040009dc000,12160,PROT_READ|PROT_WRITE,MAP_PRIVATE|MAP_ANON= YMOUS|MAP_FIXED,-1,0) =3D 0x00000040009dc000 259 close(3) =3D 0 259 mprotect(0x00000040009d6000,16384,PROT_READ) =3D 0 259 mprotect(0x0000004000866000,4096,PROT_READ) =3D 0 259 mprotect(0x000000000041f000,4096,PROT_READ) =3D 0 259 mprotect(0x0000004000840000,4096,PROT_READ) =3D 0 259 munmap(0x0000004000843000,13646) =3D 0 259 brk(NULL) =3D 0x0000000000421000 259 brk(0x0000000000442000) =3D 0x0000000000442000 259 brk(NULL) =3D 0x0000000000442000 259 io_setup(10,4330144,4330160,4330144,274886726560,511) =3D -1 errno=3D38= (Function not implemented) 259 io_destroy(0,274886726560,38,274886726560,511,512) =3D -1 errno=3D38 (F= unction not implemented) 259 fstat(1,0x0000004000800388) =3D 0 259 write(1,0x4212c0,11)res is: -38 =3D 11 259 exit_group(0) Thanks for looking into this issue, Laurent Vivier! -- = 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