+ LASSERT(ni->ni_ncpts >= 1);
+
+ if (ni->ni_ncpts == 1)
+ return ni->ni_maxtxcredits;
+
+ credits = ni->ni_maxtxcredits / ni->ni_ncpts;
+ credits = max(credits, 8 * ni->ni_peertxcredits);
+ credits = min(credits, ni->ni_maxtxcredits);
+
+ return credits;
+}
+
+void
+lnet_shutdown_lndnis (void)
+{
+ int i;
+ int islo;
+ lnet_ni_t *ni;
+
+ /* NB called holding the global mutex */
+
+ /* All quiet on the API front */
+ LASSERT(!the_lnet.ln_shutdown);
+ LASSERT(the_lnet.ln_refcount == 0);
+ LASSERT(cfs_list_empty(&the_lnet.ln_nis_zombie));
+
+ lnet_net_lock(LNET_LOCK_EX);
+ the_lnet.ln_shutdown = 1; /* flag shutdown */
+
+ /* Unlink NIs from the global table */
+ while (!cfs_list_empty(&the_lnet.ln_nis)) {
+ ni = cfs_list_entry(the_lnet.ln_nis.next,
+ lnet_ni_t, ni_list);
+ /* move it to zombie list and nobody can find it anymore */
+ cfs_list_move(&ni->ni_list, &the_lnet.ln_nis_zombie);
+ lnet_ni_decref_locked(ni, 0); /* drop ln_nis' ref */
+
+ if (!cfs_list_empty(&ni->ni_cptlist)) {
+ cfs_list_del_init(&ni->ni_cptlist);
+ lnet_ni_decref_locked(ni, 0);
+ }
+ }
+
+ /* Drop the cached eqwait NI. */
+ if (the_lnet.ln_eq_waitni != NULL) {
+ lnet_ni_decref_locked(the_lnet.ln_eq_waitni, 0);
+ the_lnet.ln_eq_waitni = NULL;
+ }
+
+ /* Drop the cached loopback NI. */
+ if (the_lnet.ln_loni != NULL) {
+ lnet_ni_decref_locked(the_lnet.ln_loni, 0);
+ the_lnet.ln_loni = NULL;
+ }
+
+ lnet_net_unlock(LNET_LOCK_EX);
+
+ /* Clear lazy portals and drop delayed messages which hold refs
+ * on their lnet_msg_t::msg_rxpeer */
+ for (i = 0; i < the_lnet.ln_nportals; i++)
+ LNetClearLazyPortal(i);
+
+ /* Clear the peer table and wait for all peers to go (they hold refs on
+ * their NIs) */
+ lnet_peer_tables_cleanup();
+
+ lnet_net_lock(LNET_LOCK_EX);
+ /* Now wait for the NI's I just nuked to show up on ln_zombie_nis
+ * and shut them down in guaranteed thread context */
+ i = 2;
+ while (!cfs_list_empty(&the_lnet.ln_nis_zombie)) {
+ int *ref;
+ int j;
+
+ ni = cfs_list_entry(the_lnet.ln_nis_zombie.next,
+ lnet_ni_t, ni_list);
+ cfs_list_del_init(&ni->ni_list);
+ cfs_percpt_for_each(ref, j, ni->ni_refs) {
+ if (*ref == 0)
+ continue;
+ /* still busy, add it back to zombie list */
+ cfs_list_add(&ni->ni_list, &the_lnet.ln_nis_zombie);
+ break;
+ }
+
+ while (!cfs_list_empty(&ni->ni_list)) {
+ lnet_net_unlock(LNET_LOCK_EX);
+ ++i;
+ if ((i & (-i)) == i) {
+ CDEBUG(D_WARNING,
+ "Waiting for zombie LNI %s\n",
+ libcfs_nid2str(ni->ni_nid));
+ }
+ cfs_pause(cfs_time_seconds(1));
+ lnet_net_lock(LNET_LOCK_EX);
+ continue;
+ }
+
+ ni->ni_lnd->lnd_refcount--;
+ lnet_net_unlock(LNET_LOCK_EX);
+
+ islo = ni->ni_lnd->lnd_type == LOLND;
+
+ LASSERT (!in_interrupt ());
+ (ni->ni_lnd->lnd_shutdown)(ni);
+
+ /* can't deref lnd anymore now; it might have unregistered
+ * itself... */