[Bug 1735953] Re: samba mount fails to write

[NBR]

I was mistaken about the cause of this bug. It appears that some default
setting has changed, and cifs mounts need uid and gid options passed
explicitly. In previous Ubuntu versions, I could mount cifs with just
credentials provided I set the owners of the mount point and remote
files correctly, a one-time detail. In Ubuntu 17.10, if I fail to pass
uid,gid to cifs mount options, it's mounted as root:root and the only
access is by everyone permissions or if I'm root.

Workaround: when mounting cifs, use options as such:
defaults,uid=1001,gid=1001,credentials=[path]

Where the ids can be retrieved using 'id [name]' from the shell.

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https://bugs.launchpad.net/bugs/1735953

Title:
  samba mount fails to write

Status in samba:
  Unknown
Status in samba package in Ubuntu:
  New

Bug description:
  Ubuntu 17.10 appears to aggressively trigger Samba bug 10541 (
  https://bugzilla.samba.org/show_bug.cgi?id=10541 ). Previous versions
  of Ubuntu worked fine, but 17.10 appears to request quota information
  on every write, resulting in a complete inability to write to files.

  Remote Samba share is mounted as cifs as read-write, and has been
  working for years and many software releases. Unable to write/create
  files from bash, from GUI file browser, or even from a Windows VM with
  access to the mounted location. I haven't seen any scenario where
  Ubuntu 17.10 can write to the share.

  Server is running Samba 4.7.3 with a long-running good configuration.

  Every write request from my Ubuntu desktop results in the following
  server log:

  [2017/12/02 16:44:25.306674,  0] ../source3/lib/sysquotas.c:461(sys_get_quota)
    sys_path_to_bdev() failed for path [.]!

  There are no other log entries.

  The root bug appears to be in Samba, but recent changes to Ubuntu have
  triggered the bug in a way that breaks write functionality.

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