find_lock_owner
lop = find_lock_owner(rp, pid, LOWN_VALID_STATEID);
lop = find_lock_owner(rp, pid, LOWN_VALID_STATEID);
lop = find_lock_owner(rp, pid, LOWN_ANY);
lop = find_lock_owner(rp, curproc->p_pid, LOWN_ANY);
lop = find_lock_owner(rp, curproc->p_pid, LOWN_ANY);
lop = find_lock_owner(rp, curproc->p_pid, LOWN_ANY);
extern nfs4_lock_owner_t *find_lock_owner(struct rnode4 *, pid_t, lown_which_t);