Unable to create NFSv4 ACLs on Linux client with Azure Files enabled with NFS

Question

Storage Account
Performance: Premium
Type: FileStorage
FileShare Protocol: NFS

Client
Ubuntu Focal

I am able to mount the file share with and confirmed its mounting with NFSv4:

nfsstat -m
/<mount> from <sto-acct>.privatelink.file.core.windows.net:/<sto-acct>/<fs>
 Flags:rw,relatime,vers=4.1,rsize=1048576,wsize=1048576,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,clientaddr=<client-ip>,
local_lock=none,addr=<ip>

However getting or setting ACLs fails:

nfs4_getfacl /<mount>
Operation to request attribute not supported.

nfs4_editfacl /<mount>
Operation to request attribute not supported.
Failed to instantiate ACL.

Answer 1

@Eli Miller Thanks for reaching out to Microsoft Q&A.

I confirmed with our team that at this time, this feature is not supported i.e., NFSv4 ACLs are not supported.

This link here mentions that most features are supported here- NFS file shares currently only support most features from the 4.1 protocol specification. Some features such as delegations and callback of all kinds, Kerberos authentication, and encryption-in-transit are not supported. Unfortunately, ACLs are not one of them.

Please let me know if you have any further questions or concerns and

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Please let me know if you have any further questions or concerns and I will be glad to assist further. Thank you!