OS-2001 disk-monitor should activate fault/fail indicators

*** 835,839 ****
--- 835,891 ----
          wp->tw_thp = thp;
          wp->tw_mod = mod;
  
          return (wp);
  }
+ 
+ /*
+  * Walk the direct children of the given node.
+  */
+ int
+ topo_node_child_walk(topo_hdl_t *thp, tnode_t *pnode, topo_walk_cb_t cb_f,
+     void *arg, int *errp)
+ {
+         int ret = TOPO_WALK_TERMINATE;
+         tnode_t *cnode;
+ 
+         topo_node_hold(pnode);
+ 
+         /*
+          * First Child:
+          */
+         topo_node_lock(pnode);
+         cnode = topo_child_first(pnode);
+         topo_node_unlock(pnode);
+ 
+         if (cnode == NULL) {
+                 *errp = ETOPO_WALK_EMPTY;
+                 ret = TOPO_WALK_ERR;
+                 goto out;
+         }
+ 
+         while (cnode != NULL) {
+                 int iret;
+ 
+                 /*
+                  * Call the walker callback:
+                  */
+                 topo_node_hold(cnode);
+                 iret = cb_f(thp, cnode, arg);
+                 topo_node_rele(cnode);
+                 if (iret != TOPO_WALK_NEXT) {
+                         ret = iret;
+                         break;
+                 }
+ 
+                 /*
+                  * Next child:
+                  */
+                 topo_node_lock(pnode);
+                 cnode = topo_child_next(pnode, cnode);
+                 topo_node_unlock(pnode);
+         }
+ 
+ out:
+         topo_node_rele(pnode);
+         return (ret);
+ }