mask_from_posix
ace->access_mask = mask_from_posix(pa->e_perm, flags | NFS4_ACL_OWNER);
ace->access_mask = mask_from_posix(pa->e_perm & pas.mask,
ace->access_mask = mask_from_posix(pas.group, flags);
ace->access_mask = mask_from_posix(pa->e_perm & pas.mask,
ace->access_mask = mask_from_posix(pa->e_perm, flags);