[Bug 1094019] Re: Linux's getdents gets /.. inode number from host system under LXC
I can't reproduce this on my raring laptop. ubuntu@r2:~$ ls -lid / /.. 2783189 drwxr-xr-x 22 root root 4096 Jan 2 15:58 / 2783189 drwxr-xr-x 22 root root 4096 Jan 2 15:58 /.. -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to lxc in Ubuntu. https://bugs.launchpad.net/bugs/1094019 Title: Linux's getdents gets /.. inode number from host system under LXC To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1094019/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 1094019] Re: Linux's getdents gets /.. inode number from host system under LXC
Nor can I reproduce it on a precise instance running 3.2.0-35-virtual #55-Ubuntu: ubuntu@p1:~$ ls -lid / /.. 139754 drwxr-xr-x 22 root root 4096 Jan 2 16:09 / 139754 drwxr-xr-x 22 root root 4096 Jan 2 16:09 /.. ** Changed in: lxc (Ubuntu) Importance: Undecided = Critical ** Changed in: lxc (Ubuntu) Importance: Critical = Medium -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to lxc in Ubuntu. https://bugs.launchpad.net/bugs/1094019 Title: Linux's getdents gets /.. inode number from host system under LXC To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1094019/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 1094019] Re: Linux's getdents gets /.. inode number from host system under LXC
Ok, sorry, I see now. Yes i can reproduce this with getdents of course. This has nothing to do with lxc lying, and yes if you need to work around this you'll need to use blockdev-backed rootfs for the containers. The container is set up with the tasks pivot_root'd into the container's /, which in your case is a bind mount. Resolution of '..' respects the fact that the /var/lib/lxc/container/rootfs should be root, and returns itself. However, there is only one actual directory entry for /var/lib/lxc/container/rootfs in all the kernel, and it's '..' (d_parent) points to /var/lib/lxc/container. Lxc can't do anything about that. The kernel's flexible mounts, bind mounts, and mounts namespaces provide different *views* of the filesystems, don't change what is in the actual filesystems. ** Changed in: lxc (Ubuntu) Status: New = Won't Fix -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to lxc in Ubuntu. https://bugs.launchpad.net/bugs/1094019 Title: Linux's getdents gets /.. inode number from host system under LXC To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1094019/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
Re: [Bug 1094019] Re: Linux's getdents gets /.. inode number from host system under LXC
Hi Serge, You need to compile the C code on http://www.kernel.org/doc/man-pages/online/pages/man2/getdents.2.html and run it to see this issue. It's getdent sys-call that sees different numbers. Please confirm On Wed, Jan 2, 2013 at 6:10 PM, Serge Hallyn 1094...@bugs.launchpad.netwrote: Nor can I reproduce it on a precise instance running 3.2.0-35-virtual #55-Ubuntu: ubuntu@p1:~$ ls -lid / /.. 139754 drwxr-xr-x 22 root root 4096 Jan 2 16:09 / 139754 drwxr-xr-x 22 root root 4096 Jan 2 16:09 /.. ** Changed in: lxc (Ubuntu) Importance: Undecided = Critical ** Changed in: lxc (Ubuntu) Importance: Critical = Medium -- You received this bug notification because you are subscribed to the bug report. https://bugs.launchpad.net/bugs/1094019 Title: Linux's getdents gets /.. inode number from host system under LXC Status in “lxc” package in Ubuntu: New Bug description: Calling getdents on / gets the host system's inode number for /.., which is different from /. unlike real (non lxc) systems. This causes flexlm to fail More info at http://foss-boss.blogspot.com/2012/12/LXC-lies-about -..-inode-number-making-flexlm-unhappy.html ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: lxc 0.7.5-3ubuntu65 ProcVersionSignature: User Name 3.2.0-34.53-virtual 3.2.33 Uname: Linux 3.2.0-34-virtual x86_64 ApportVersion: 2.0.1-0ubuntu15 Architecture: amd64 Date: Thu Dec 27 13:13:46 2012 Ec2AMI: ami-2737b74e Ec2AMIManifest: (unknown) Ec2AvailabilityZone: us-east-1d Ec2InstanceType: t1.micro Ec2Kernel: aki-825ea7eb Ec2Ramdisk: unavailable KernLog: MarkForUpload: True ProcEnviron: TERM=xterm LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: lxc UpgradeStatus: No upgrade log present (probably fresh install) lxcsyslog: modified.conffile..etc.lxc.lxc.conf: [modified] mtime.conffile..etc.lxc.lxc.conf: 2012-12-04T17:17:14.072195 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1094019/+subscriptions -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to lxc in Ubuntu. https://bugs.launchpad.net/bugs/1094019 Title: Linux's getdents gets /.. inode number from host system under LXC To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1094019/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
Re: [Bug 1094019] Re: Linux's getdents gets /.. inode number from host system under LXC
Ok I see, will use block backed lxc then. Thanks On Wed, Jan 2, 2013 at 6:32 PM, Serge Hallyn 1094...@bugs.launchpad.netwrote: Ok, sorry, I see now. Yes i can reproduce this with getdents of course. This has nothing to do with lxc lying, and yes if you need to work around this you'll need to use blockdev-backed rootfs for the containers. The container is set up with the tasks pivot_root'd into the container's /, which in your case is a bind mount. Resolution of '..' respects the fact that the /var/lib/lxc/container/rootfs should be root, and returns itself. However, there is only one actual directory entry for /var/lib/lxc/container/rootfs in all the kernel, and it's '..' (d_parent) points to /var/lib/lxc/container. Lxc can't do anything about that. The kernel's flexible mounts, bind mounts, and mounts namespaces provide different *views* of the filesystems, don't change what is in the actual filesystems. ** Changed in: lxc (Ubuntu) Status: New = Won't Fix -- You received this bug notification because you are subscribed to the bug report. https://bugs.launchpad.net/bugs/1094019 Title: Linux's getdents gets /.. inode number from host system under LXC Status in “lxc” package in Ubuntu: Won't Fix Bug description: Calling getdents on / gets the host system's inode number for /.., which is different from /. unlike real (non lxc) systems. This causes flexlm to fail More info at http://foss-boss.blogspot.com/2012/12/LXC-lies-about -..-inode-number-making-flexlm-unhappy.html ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: lxc 0.7.5-3ubuntu65 ProcVersionSignature: User Name 3.2.0-34.53-virtual 3.2.33 Uname: Linux 3.2.0-34-virtual x86_64 ApportVersion: 2.0.1-0ubuntu15 Architecture: amd64 Date: Thu Dec 27 13:13:46 2012 Ec2AMI: ami-2737b74e Ec2AMIManifest: (unknown) Ec2AvailabilityZone: us-east-1d Ec2InstanceType: t1.micro Ec2Kernel: aki-825ea7eb Ec2Ramdisk: unavailable KernLog: MarkForUpload: True ProcEnviron: TERM=xterm LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: lxc UpgradeStatus: No upgrade log present (probably fresh install) lxcsyslog: modified.conffile..etc.lxc.lxc.conf: [modified] mtime.conffile..etc.lxc.lxc.conf: 2012-12-04T17:17:14.072195 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1094019/+subscriptions -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to lxc in Ubuntu. https://bugs.launchpad.net/bugs/1094019 Title: Linux's getdents gets /.. inode number from host system under LXC To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1094019/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
