"Currently, the filesystems that support NFSv4 ACL in IBM AIX 5L version 5.3 and above are NFSv4, JFS2 with EAv2 (Extended Journaled Filesystem with Extended Attributes format version 2), and General Parallel Filesystem (GPFS). In Sun Solaris, this ACL model is supported by ZFS. In RedHat Linux, NFSv4 supports NFSv4 ACLs.
"What is an ACL?
"An Access Control List (ACL) is used to specify access permissions to filesystem objects, like files and directories. Is a list of many Access Control Entries (ACEs), in which each entry defines a user or a group, and different permissions to each of them.
"About ZFS ACLs
"ZFS file system, introduced by Sun, is available in the Solaris 10 OS pack.
"ZFS supports the NFSv4 ACL model, and has implemented the commands in the form of new options to the existing ls and chmod commands. Thus, the ACLs can be set and displayed using the chmod and ls commands; no new command has been introduced. Because of this, it is very easy to work with ACLs in ZFS."
