[LU-974] Lustre does not ignore umask when default ACL with mask is set

Duplicate — Tue, 12 Mar 2019 19:20:47 +0000

One of our users recently requested us to turn on ACLs on a new Lustre filesystem.
After doing so, we discovered that one of the features this user group needs,
does not seem to be supported by Lustre: setting a mask in the ACL that
overrides the umask of the user creating files/directories.

We thinks this is the same as https://bugzilla.lustre.org/show_bug.cgi?id=23194

We include logs showing behavious with Lustre, and for comparison NFS (backed by XFS)
and a local ext4 filesystem.

LUSTRE
======

Client: lustre-1.8.7.80-2.6.18_274.12.1.el5_g27e7ce7
(patchless build a few commits beyond 1.8.7-wc1 in order
to get the fix for ~~LU-645~~).

Server: lustre-1.8.5-2.6.18_194.17.1.el5_lustre.1.8.5.nsc1_201105161812
(1.8.5 with a single patch for ~~LU-274~~)

[kent@server ~]$ umask
0022

[kent@server ~]$ cd /nobackup/rossby16/kent

[kent@server kent]$ mkdir subdir

[kent@server kent]$ setfacl -R -d -m mask:007 subdir

[kent@server kent]$ getfacl subdir

file: subdir
owner: kent
group: nsc
user::rwx
group::r-x
other::r-x
default:user::rwx
default:group::r-x
default:mask::rwx
default:other::r-x

[kent@server kent]$ mkdir subdir/dir

[kent@server kent]$ touch subdir/file

[kent@server kent]$ ls -lrt subdir/
total 4
drwxr-xr-x+ 2 kent nsc 4096 Jan 9 14:45 dir
~~rw-r~~r-+ 1 kent nsc 0 Jan 9 14:45 file

[kent@server kent]$ ls -lrtd subdir
drwxr-xr-x+ 3 kent nsc 4096 Jan 9 14:45 subdir

COMPARISON: NFS BACKED BY XFS
=============================

Client/server: CentOS 5 kernel 2.6.18-274.12.1.el5

[kent@server ~]$ umask
0022

[kent@server ~]$ mkdir subdir

[kent@server ~]$ setfacl -R -d -m mask:007 subdir

[kent@server ~]$ getfacl subdir

file: subdir
owner: kent
group: nsc
user::rwx
group::r-x
other::r-x
default:user::rwx
default:group::r-x
default:mask::rwx
default:other::r-x

[kent@server ~]$ mkdir subdir/dir

[kent@server ~]$ touch subdir/file

[kent@server ~]$ ls -lrt subdir/
total 8
drwxrwxr-x+ 2 kent nsc 6 Jan 9 14:48 dir
~~rw-rw-r~~-+ 1 kent nsc 0 Jan 9 14:48 file

[kent@server ~]$ ls -lrtd subdir
drwxr-xr-x+ 3 kent nsc 27 Jan 9 14:48 subdir

COMPARISION: FEDORA 16
======================

Local ext4 filesystem on kernel 3.1.6-1.fc16.x86_64

[kent@workstation]~% umask
022

[kent@workstation]~% mkdir subdir

[kent@workstation]~% setfacl -R -d -m mask:007 subdir

[kent@workstation]~% getfacl subdir

file: subdir
owner: kent
group: kent
user::rwx
group::r-x
other::r-x
default:user::rwx
default:group::r-x
default:mask::rwx
default:other::r-x

[kent@workstation]~% mkdir subdir/dir

[kent@workstation]~% touch subdir/file

[kent@workstation]~% ls -lrt subdir/
total 12
drwxrwxr-x+ 2 kent kent 4096 Jan 9 14:50 dir
~~rw-rw-r~~-+ 1 kent kent 0 Jan 9 14:50 file

[kent@workstation]~% ls -lrtd subdir
drwxr-xr-x+ 3 kent kent 4096 Jan 9 14:50 subdir

Whamcloud Community JIRA

[LU-974] Lustre does not ignore umask when default ACL with mask is set