nfs: Add richacl support

Add support for the "system.richacl" xattr in nfs.  The existing
"system.nfs4_acl" xattr on nfs doesn't map user and group names to uids
and gids; the "system.richacl" xattr does, and only keeps the
on-the-wire names when there is no mapping.  This allows to copy
permissions across different file systems.

Signed-off-by: Andreas Gruenbacher <>
7 files changed