As per nfs4acl-0.9/lib/nfs4acl.c (the package where this structure is originally defined)
Andrew Bartlett
Reviewed-by: Jeremy Allison <jra@samba.org>
{
const char *NFS4ACL_XATTR_NAME = "system.nfs4acl";
+ const char *NFS4ACL_XATTR_OWNER_WHO = "OWNER@";
+ const char *NFS4ACL_XATTR_GROUP_WHO = "GROUP@";
+ const char *NFS4ACL_XATTR_EVERYONE_WHO = "EVERYONE@";
+
/* these structures use the same bit values and other constants as
in security.idl */
typedef [flag(NDR_BIG_ENDIAN)] struct {