[Bug 1605230] Re: sub-directories initially only accessible by root

[KeithP]

We are also experiencing this issue -- any additional information on how
to address this would be greatly appreciated.

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Title:
  sub-directories initially only accessible by root

Status in nfs-utils package in Ubuntu:
  Confirmed

Bug description:
  sub-directories initially only accessible by root

  Client: (K)Ubuntu 16.04 LTS - new install (not upgrade) fully up-to-date
  Server: Ubuntu 14.04 LTS - fully up-to-date
  Client Package: nfs-common 1:1.2.8-9ubuntu12

  No access issues using Kubuntu 15.04 client in the past or currently.
  Server configuration unchanged.

  Attempting to access all subfolders of NFS mount fails for user.
  Primary folder is listable, subfolders are not, files in first level
  folder are accessable. If a subfolder is accessed by root user, it
  (and all nested subfolders and files) becomes accessible by users.
  After an unknown amount of time, subfolders revert back to
  inaccessible by user unless subfolder is kept "active" - like having
  it open in Dolphin. Permissions appear correct.

  :~$ ll /shared
  total 148
  drwxrwsr-x 1 nobody shared    274 Jul 18 14:03 ./
  drwxr-xr-x 1 root   root      262 Jul 16 12:41 ../
  drwxrwsr-x 1 nobody shared    120 Jul  6 11:49 Audio/
  drwxrwsr-x 1 nobody shared     18 Jul  6 11:49 Backups/
  -rw------- 1 nobody shared     35 Jul  7 13:42 .directory
  drwxrwsr-x 1 nobody shared    612 Jul  8 09:12 Documents/

  ~$ ll /shared/Audio/
  ls: cannot access '/shared/Audio/': Operation not permitted

  ~$ sudo ls /shared/Audio/
  [sudo] password: 
  Audio Books  Comedy  Holiday  Ringtones

  :~$ ll /shared/Audio/
  total 0
  drwxrwsr-x 1 nobody shared  120 Jul  6 11:49 ./
  drwxrwsr-x 1 nobody shared  274 Jul 18 14:03 ../
  drwxrwsr-x 1 nobody shared  390 Jun 12  2011 Audio Books/
  drwxrwsr-x 1 nobody shared 4882 May 22 14:49 Comedy/
  drwxrwsr-x 1 nobody shared  166 Nov 22  2013 Holiday/
  drwxrwsr-x 1 nobody shared 1290 Jul  7  2015 Ringtones/

  fstab same for both client versions (15.04, 16.04):
  server:/ /shared nfs4 auto,bg,soft,users,rsize=65536,wsize=65536,noatime,x-systemd.automount 0 0
  server:/ /shared nfs4 auto,bg,soft,users,rsize=65536,wsize=65536,noatime,x-systemd.automount 0 0

  export line from server:
  /exports 192.168.1.0/24(rw,fsid=0,crossmnt,no_subtree_check,async,secure,nohide,all_squash,anonuid=65534,anongid=560)

  client-side user groups: adm cdrom sudo dip backup plugdev users
  lpadmin sambashare wireshark shared

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