[Bug 1754506] Re: AutoFS does not automatically umount SMB shares

[ChristianEhrhardt]

Thanks for debugging this issue down to your configuration bit that triggered it.
As well as to point out the existing upstream fix.

The issue isn't sever enough to qualify for an SRU IMHO, but it would be
good to pick it up on the next merge cycle for the follow on release.

There is no 5.1.5 release yet upstream to contain that fix, but sooner
or later there hoefully should be one that we can then easily pick up to
fix this issue avoiding the need that users take care of trailing
slashes in their config.

** Tags added: merge server-next upgrade-software-version

** Changed in: autofs (Ubuntu)
       Status: Incomplete => Triaged

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Title:
  AutoFS does not automatically umount SMB shares

Status in autofs package in Ubuntu:
  Triaged

Bug description:
  Description:    Ubuntu 17.10
  Release:        17.10

  autofs:
    Installed: 5.1.2-1ubuntu1
    Candidate: 5.1.2-1ubuntu1
    Version table:
   *** 5.1.2-1ubuntu1 500
          500 http://de.archive.ubuntu.com/ubuntu artful/main amd64 Packages
          100 /var/lib/dpkg/status

  Kernel: self-built 4.15.6

  What I expect:
  I expect AutoFS to automatically unmount my samba share after the timeout. However, it does not. The share is still mounted.
  I've turned the autofs debug output in the kernel module. As far as I can tell, the kernel thinks the cifs mount is still busy.

  I'm using the smb automount script provided by the package: /etc/auto.smb. I've just added an additional cifs parameter(vers=2.0).
  My auto.master looks as follows:
  /media/smb/      program:/etc/auto.smb

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