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Intermittent access denied on Flexgroup with NFSv4 or NTFS ACLs

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Category:
ontap-9
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Applies to

  • ONTAP 9
  • Flexgroup
  • NFSv4 ACLs
  • NTFS ACLs

Issue

  • Access is denied intermittently on a Flexgroup volume on files/folders that have NFSv4_acls or Windows NTFS ACLs configured.
  • After some time access is restored without intervention
  • Security traces capturing success and failure cases show that NFSv4 ACL is not present at the time of the issue and access is determined based on UNIX mode bits:

  •                       Protocol: cifs
                          Volume: -
                          Share: share1
                          Path: /folder1/folder2/
                          file1
                          Win-User: DOMAIN\user
                          UNIX-User: user
                          Session-ID: 1122334455667788990
    node-01         1     Security Style: UNIX    <<<   Access is denied by UNIX  <<<
                          permissions                permissions while traversing
                                                     the directory. Access is not
                                                     granted for: "Synchronize",
                                                     "Read Control", "Read
                                                     Attributes", "Execute"

                          Protocol: cifs
                          Volume: -
                          Share: share1
                          Path: /folder1/folder2/
                          file1
                          Win-User: DOMAIN\user
                          UNIX-User: user
                          Session-ID: 1122334455667788990
    node=01         1     Security Style: UNIX and   <<<<  Access is allowed because <<<
                          NFSv4 ACL                  explicit ACE grants requested
                                                     access while opening existing
                                                     file or directory. Access is
                                                     granted for: "Read Control",
                                                     "Read Attributes", "Read EA",
                                                     "Read"

 

 

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