[Bug 1589289] Re: fstrim: cannot open /dev/.lxd-mounts: Permission denied

[Johan Ehnberg]

** Description changed:

- fstrun daily cronjob output in an unprivileged LXD container:
+ fstrun weekly cronjob output in an unprivileged LXD container:
  
  /etc/cron.weekly/fstrim:
  fstrim: cannot open /dev/.lxd-mounts: Permission denied
  fstrim: /dev/fuse: not a directory
  fstrim: /dev/lxd: FITRIM ioctl failed: Operation not permitted
  
- 
  There is a github issue:
  
  https://github.com/lxc/lxd/issues/2030
  
- 
- The outcome is that it's purely an fstrim misbehaviour, it could be smarter.
- 
+ The outcome is that it's purely an fstrim misbehaviour, it could be
+ smarter.
  
  Stephane Graber comment:
  
- 
- 
- As all of this is handled by the kernel, there isn't anything we can do about it in LXD.
+ As all of this is handled by the kernel, there isn't anything we can do
+ about it in LXD.
  
  I think fstrim should be made slightly more clever:
  
  * Don't run on bind-mounts (you can detect bind-mounts by parsing /proc/self/mountinfo instead of /proc/mounts)
  * Maybe not be as noisy on expected errors like EACCES, EPERM and ENOENT, only log actual failures which would likely be EINVAL or memory related errors.
  
  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: util-linux 2.27.1-6ubuntu3
  ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6
  Uname: Linux 4.4.0-21-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.1
  Architecture: amd64
  Date: Sun Jun  5 19:49:04 2016
  ProcEnviron:
-  LANGUAGE=en_US:en
-  TERM=xterm
-  PATH=(custom, no user)
-  LANG=en_US.UTF-8
-  SHELL=/bin/bash
+  LANGUAGE=en_US:en
+  TERM=xterm
+  PATH=(custom, no user)
+  LANG=en_US.UTF-8
+  SHELL=/bin/bash
  SourcePackage: util-linux
  UpgradeStatus: No upgrade log present (probably fresh install)

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to util-linux in Ubuntu.
https://bugs.launchpad.net/bugs/1589289

Title:
  fstrim: cannot open /dev/.lxd-mounts: Permission denied

Status in util-linux package in Ubuntu:
  Confirmed

Bug description:
  fstrun weekly cronjob output in an unprivileged LXD container:

  /etc/cron.weekly/fstrim:
  fstrim: cannot open /dev/.lxd-mounts: Permission denied
  fstrim: /dev/fuse: not a directory
  fstrim: /dev/lxd: FITRIM ioctl failed: Operation not permitted

  There is a github issue:

  https://github.com/lxc/lxd/issues/2030

  The outcome is that it's purely an fstrim misbehaviour, it could be
  smarter.

  Stephane Graber comment:

  As all of this is handled by the kernel, there isn't anything we can
  do about it in LXD.

  I think fstrim should be made slightly more clever:

  * Don't run on bind-mounts (you can detect bind-mounts by parsing /proc/self/mountinfo instead of /proc/mounts)
  * Maybe not be as noisy on expected errors like EACCES, EPERM and ENOENT, only log actual failures which would likely be EINVAL or memory related errors.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: util-linux 2.27.1-6ubuntu3
  ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6
  Uname: Linux 4.4.0-21-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.1
  Architecture: amd64
  Date: Sun Jun  5 19:49:04 2016
  ProcEnviron:
   LANGUAGE=en_US:en
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: util-linux
  UpgradeStatus: No upgrade log present (probably fresh install)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/util-linux/+bug/1589289/+subscriptions