lnet/router/router.h

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * Copyright (C) 2002 Cluster File Systems, Inc.
   5  *
   6  *   This file is part of Portals
   7  *   http://sourceforge.net/projects/sandiaportals/
   8  *
   9  *   Portals is free software; you can redistribute it and/or
  10  *   modify it under the terms of version 2 of the GNU General Public
  11  *   License as published by the Free Software Foundation.
  12  *
  13  *   Portals is distributed in the hope that it will be useful,
  14  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *   GNU General Public License for more details.
  17  *
  18  *   You should have received a copy of the GNU General Public License
  19  *   along with Portals; if not, write to the Free Software
  20  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21  *
  22  */
  23
  24 #ifndef _KPTLROUTER_H
  25 #define _KPTLROUTER_H
  26 #define EXPORT_SYMTAB
  27
  28 #include <linux/config.h>
  29 #include <linux/module.h>
  30 #include <linux/kernel.h>
  31 #include <linux/mm.h>
  32 #include <linux/string.h>
  33 #include <linux/errno.h>
  34 #include <linux/proc_fs.h>
  35 #include <linux/init.h>
  36
  37 #define DEBUG_SUBSYSTEM S_PTLROUTER
  38
  39 #include <linux/kp30.h>
  40 #include <portals/p30.h>
  41 #include <portals/lib-p30.h>
  42
  43 typedef struct
  44 {
  45         struct list_head        kpne_list;
  46         kpr_nal_interface_t     kpne_interface;
  47         atomic_t                kpne_refcount;
  48         int                     kpne_shutdown;
  49 } kpr_nal_entry_t;
  50
  51 typedef struct
  52 {
  53         struct list_head        kpge_list;
  54         atomic_t                kpge_weight;
  55         time_t                  kpge_timestamp;
  56         int                     kpge_alive;
  57         int                     kpge_nalid;
  58         int                     kpge_refcount;
  59         ptl_nid_t               kpge_nid;
  60 } kpr_gateway_entry_t;
  61
  62 typedef struct
  63 {
  64         struct list_head        kpre_list;
  65         kpr_gateway_entry_t    *kpre_gateway;
  66         ptl_nid_t               kpre_lo_nid;
  67         ptl_nid_t               kpre_hi_nid;
  68 } kpr_route_entry_t;
  69
  70 typedef struct
  71 {
  72         struct tq_struct        kpru_tq;
  73         int                     kpru_nal_id;
  74         ptl_nid_t               kpru_nid;
  75         int                     kpru_alive;
  76         time_t                  kpru_when;
  77 } kpr_upcall_t;
  78
  79 extern int kpr_register_nal (kpr_nal_interface_t *nalif, void **argp);
  80 extern int kpr_lookup_target (void *arg, ptl_nid_t target_nid, int nob,
  81                               ptl_nid_t *gateway_nidp);
  82 extern kpr_nal_entry_t *kpr_find_nal_entry_locked (int nal_id);
  83 extern void kpr_forward_packet (void *arg, kpr_fwd_desc_t *fwd);
  84 extern void kpr_complete_packet (void *arg, kpr_fwd_desc_t *fwd, int error);
  85 extern void kpr_nal_notify (void *arg, ptl_nid_t peer,
  86                             int alive, time_t when);
  87 extern void kpr_shutdown_nal (void *arg);
  88 extern void kpr_deregister_nal (void *arg);
  89
  90 extern void kpr_proc_init (void);
  91 extern void kpr_proc_fini (void);
  92
  93 extern int kpr_add_route (int gateway_nal, ptl_nid_t gateway_nid,
  94                           ptl_nid_t lo_nid, ptl_nid_t hi_nid);
  95 extern int kpr_del_route (int gw_nal, ptl_nid_t gw_nid,
  96                           ptl_nid_t lo, ptl_nid_t hi);
  97 extern int kpr_get_route (int idx, int *gateway_nal, ptl_nid_t *gateway_nid,
  98                           ptl_nid_t *lo_nid, ptl_nid_t *hi_nid, int *alive);
  99 extern int kpr_sys_notify (int gw_nalid, ptl_nid_t gw_nid,
 100                            int alive, time_t when);
 101
 102 extern unsigned long long kpr_fwd_bytes;
 103 extern unsigned long      kpr_fwd_packets;
 104 extern unsigned long      kpr_fwd_errors;
 105 extern atomic_t           kpr_queue_depth;
 106
 107 #endif /* _KPLROUTER_H */