NEX-3622 COMSTAR should have per remote port kstats for I/O and latency
Reviewed by: Rob Gittins <rob.gittins@nexenta.com>
Reviewed by: Yuri Pankov <yuri.pankov@nexenta.com>

*** 35,44 ****
--- 35,45 ----
  
  #include <sys/socket.h>
  #include <sys/strsubr.h>
  #include <sys/note.h>
  #include <sys/sdt.h>
+ #include <sys/kstat.h>
  
  #include <sys/stmf.h>
  #include <sys/stmf_ioctl.h>
  #include <sys/portif.h>
  #include <sys/idm/idm.h>
*** 209,218 ****
--- 210,220 ----
  static void
  iscsit_sess_unref(void *ist_void)
  {
          iscsit_sess_t *ist = ist_void;
          stmf_scsi_session_t *iss;
+         char prop_buf[KSTAT_STRLEN + 1];
  
          /*
           * State machine has run to completion, destroy session
           *
           * If we have an associated STMF session we should clean it
*** 223,232 ****
--- 225,237 ----
           */
          mutex_enter(&ist->ist_mutex);
          ASSERT(ist->ist_conn_count == 0);
          iss = ist->ist_stmf_sess;
          if (iss != NULL) {
+                 (void) snprintf(prop_buf, sizeof (prop_buf),
+                     "peername_%"PRIxPTR"", (uintptr_t)ist);
+                 stmf_remove_rport_info(iss, prop_buf);
                  stmf_deregister_scsi_session(ist->ist_lport, iss);
                  kmem_free(iss->ss_rport_id, sizeof (scsi_devid_desc_t) +
                      strlen(ist->ist_initiator_name) + 1);
                  stmf_remote_port_free(iss->ss_rport);
                  if (iss->ss_rport_alias)