The default NFSv4 acls may be a poor choice on ZOL. This keeps biting
people unexpectedly, I wonder how many people this has affected and they
never spot it?
Thanks
** Also affects: zfs-linux (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1779736
Title:
umask ignored on NFSv4.2 mounts
Status in linux package in Ubuntu:
Confirmed
Status in nfs-utils package in Ubuntu:
Confirmed
Status in zfs-linux package in Ubuntu:
New
Bug description:
After upgrading to kernel 4.15.0-24-generic (on Ubuntu 18.04 LTS)
NFSv4.2 mounts ignore the umask when creating files and directories.
Files get permissions 666 and directories get 777. Therefore, a umask
of 000 is seemingly being forced when creating files/directories in
NFS mounts. Mounting with noacl does not resolve the issue.
How to replicate:
1. Mount an NFS share (defaults to NFSv4.2)
2. Ensure restrictive umask: umask 022
3. Create directory: mkdir test_dir
4. Create file: touch test_file
5. List: ls -l
The result will be:
drwxrwxrwx 2 user user 2 Jul 2 12:16 test_dir
-rw-rw-rw- 1 user user 0 Jul 2 12:16 test_file
while the expected result would be
drwxr-xr-x 2 user user 2 Jul 2 12:16 test_dir
-rw-r--r-- 1 user user 0 Jul 2 12:16 test_file
Bug does not occur when mounting with any of:
vers=3
vers=4.0
vers=4.1
I have a suspicion this is related to:
https://tools.ietf.org/id/draft-ietf-nfsv4-umask-03.html
But since the server does not have ACL's enabled, and mounting with noacl
does not resolve the issue this is unexpected behavior.
Both server and client are running kernel 4.15.0-24-generic on Ubuntu
18.04 LTS. NFS package versions are:
nfs-kernel-server 1:1.3.4-2.1ubuntu5
nfs-common 1:1.3.4-2.1ubuntu5
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