ACE_ALL_WRITE_PERMS
access = ACE_ALL_PERMS & ~ACE_ALL_WRITE_PERMS;
tree->t_access &= ~ACE_ALL_WRITE_PERMS;
if (mode & ACE_ALL_WRITE_PERMS)
!((sr)->tid_tree->t_access & ACE_ALL_WRITE_PERMS))