-/**
- * This function makes sure dead exports are evicted in a timely manner.
- * This function is only called when some export receives a message (i.e.,
- * the network is up.)
- */
-static void ptlrpc_update_export_timer(struct obd_export *exp, long extra_delay)
-{
- struct obd_export *oldest_exp;
- time_t oldest_time, new_time;
-
- LASSERT(exp);
-
- /* Compensate for slow machines, etc, by faking our request time
- into the future. Although this can break the strict time-ordering
- of the list, we can be really lazy here - we don't have to evict
- at the exact right moment. Eventually, all silent exports
- will make it to the top of the list. */
-
- /* Do not pay attention on 1sec or smaller renewals. */
- new_time = get_seconds() + extra_delay;
- if (exp->exp_last_request_time + 1 /*second */ >= new_time)
- return;
-
- exp->exp_last_request_time = new_time;
-
- /* exports may get disconnected from the chain even though the
- export has references, so we must keep the spin lock while
- manipulating the lists */
- spin_lock(&exp->exp_obd->obd_dev_lock);
-
- if (list_empty(&exp->exp_obd_chain_timed)) {
- /* this one is not timed */
- spin_unlock(&exp->exp_obd->obd_dev_lock);
- return;
- }
-
- list_move_tail(&exp->exp_obd_chain_timed,
- &exp->exp_obd->obd_exports_timed);
-
- oldest_exp = list_entry(exp->exp_obd->obd_exports_timed.next,
- struct obd_export, exp_obd_chain_timed);
- oldest_time = oldest_exp->exp_last_request_time;
- spin_unlock(&exp->exp_obd->obd_dev_lock);
-
- if (exp->exp_obd->obd_recovering) {
- /* be nice to everyone during recovery */
- return;
- }
-
- /* Note - racing to start/reset the obd_eviction timer is safe */
- if (exp->exp_obd->obd_eviction_timer == 0) {
- /* Check if the oldest entry is expired. */
- if (get_seconds() > (oldest_time + PING_EVICT_TIMEOUT +
- extra_delay)) {
- /* We need a second timer, in case the net was down and
- * it just came back. Since the pinger may skip every
- * other PING_INTERVAL (see note in ptlrpc_pinger_main),
- * we better wait for 3. */
- exp->exp_obd->obd_eviction_timer =
- get_seconds() + 3 * PING_INTERVAL;
- CDEBUG(D_HA, "%s: Think about evicting %s from "CFS_TIME_T"\n",
- exp->exp_obd->obd_name,
- obd_export_nid2str(oldest_exp), oldest_time);
- }
- } else {
- if (get_seconds() >
- (exp->exp_obd->obd_eviction_timer + extra_delay)) {
- /* The evictor won't evict anyone who we've heard from
- * recently, so we don't have to check before we start
- * it. */
- if (!ping_evictor_wake(exp))
- exp->exp_obd->obd_eviction_timer = 0;
- }
- }
-}
-