[gpfsug-discuss] Filesystem sometimes does not correctly inherit acls

[Losen, Stephen C (scl)]

Hi Iban,
What you are seeing is what you get if you call mkdir(2) like this from C

mkdir(“dirname”, 0700);

or in a python script like this

import os
os.mkdir(“dirname”, Oo700)

Or you could use chmod on the directory like this: chmod 700 dirname

All of these modify the ACL mask entry so that it no longer matches the default ACL mask. Notice how everything else in the ACL still matches the default ACL. You can easily set the mask back with

chmod g+rwx dirname

(assuming that your fileset is configured to allow chmod).


Steve Losen
Research Computing
University of Virginia
scl at virginia.edu<mailto:scl at virginia.edu>  434-924-0640

From: <gpfsug-discuss-bounces at spectrumscale.org> on behalf of Iban Cabrillo <cabrillo at ifca.unican.es>
Reply-To: gpfsug main discussion list <gpfsug-discuss at spectrumscale.org>
Date: Tuesday, January 18, 2022 at 11:26 AM
To: gpfsug-discuss <gpfsug-discuss at spectrumscale.org>
Subject: [gpfsug-discuss] Filesystem sometimes does not correctly inherit acls

Dear Scalers,
  We are running 5.1.1-0 version.

 Since a couple of months we have noticed, that the directory permissions are not inherited correctly even if the default acl is set correctly:

  For example this is the default acl for a directory (mmgetacl -d):
  #owner:100
  #group:101
  user::rwxc
  group::r-x-
  other::----
  mask::rwxc
  user:user1:rwxc
  group:group1:rwx-
  group:group2:rwx-
  group:group3:rwx-

But sometimes when a new dir is creted under this directory i see this:

  #owner:100
  #group:101
  user::rwxc
  group::r-x-  #effective: ----
  other::----
  mask::---c
  user:user1:rwxc  #effective: ---c
  group:group1:rwx-  #effective: ----
  group:group2:rwx-  #effective: ----
  group:group3:rwx-  #effective: ----

Any Idea about this behavior ?

Regards, I



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