lustre/portals/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 #ifndef EXPORT_SYMTAB
  27 # define EXPORT_SYMTAB
  28 #endif
  29
  30 #include <linux/config.h>
  31 #include <linux/module.h>
  32 #include <linux/kernel.h>
  33 #include <linux/mm.h>
  34 #include <linux/string.h>
  35 #include <linux/errno.h>
  36 #include <linux/proc_fs.h>
  37 #include <linux/init.h>
  38
  39 #define DEBUG_SUBSYSTEM S_PTLROUTER
  40
  41 #include <linux/kp30.h>
  42 #include <linux/kpr.h>
  43 #include <portals/p30.h>
  44 #include <portals/lib-p30.h>
  45
  46 typedef struct
  47 {
  48         struct list_head        kpne_list;
  49         kpr_nal_interface_t     kpne_interface;
  50         atomic_t                kpne_refcount;
  51         int                     kpne_shutdown;
  52 } kpr_nal_entry_t;
  53
  54 typedef struct
  55 {
  56         struct list_head        kpge_list;
  57         atomic_t                kpge_weight;
  58         time_t                  kpge_timestamp;
  59         int                     kpge_alive;
  60         int                     kpge_nalid;
  61         int                     kpge_refcount;
  62         ptl_nid_t               kpge_nid;
  63 } kpr_gateway_entry_t;
  64
  65 typedef struct
  66 {
  67         struct list_head        kpre_list;
  68         kpr_gateway_entry_t    *kpre_gateway;
  69         ptl_nid_t               kpre_lo_nid;
  70         ptl_nid_t               kpre_hi_nid;
  71 } kpr_route_entry_t;
  72
  73 typedef struct
  74 {
  75         work_struct_t           kpru_tq;
  76         int                     kpru_nal_id;
  77         ptl_nid_t               kpru_nid;
  78         int                     kpru_alive;
  79         time_t                  kpru_when;
  80 } kpr_upcall_t;
  81
  82 extern int kpr_register_nal (kpr_nal_interface_t *nalif, void **argp);
  83 extern int kpr_lookup_target (void *arg, ptl_nid_t target_nid, int nob,
  84                               ptl_nid_t *gateway_nidp);
  85 extern kpr_nal_entry_t *kpr_find_nal_entry_locked (int nal_id);
  86 extern void kpr_forward_packet (void *arg, kpr_fwd_desc_t *fwd);
  87 extern void kpr_complete_packet (void *arg, kpr_fwd_desc_t *fwd, int error);
  88 extern void kpr_nal_notify (void *arg, ptl_nid_t peer,
  89                             int alive, time_t when);
  90 extern void kpr_shutdown_nal (void *arg);
  91 extern void kpr_deregister_nal (void *arg);
  92
  93 extern void kpr_proc_init (void);
  94 extern void kpr_proc_fini (void);
  95
  96 extern int kpr_add_route (int gateway_nal, ptl_nid_t gateway_nid,
  97                           ptl_nid_t lo_nid, ptl_nid_t hi_nid);
  98 extern int kpr_del_route (int gw_nal, ptl_nid_t gw_nid,
  99                           ptl_nid_t lo, ptl_nid_t hi);
 100 extern int kpr_get_route (int idx, int *gateway_nal, ptl_nid_t *gateway_nid,
 101                           ptl_nid_t *lo_nid, ptl_nid_t *hi_nid, int *alive);
 102 extern int kpr_sys_notify (int gw_nalid, ptl_nid_t gw_nid,
 103                            int alive, time_t when);
 104
 105 extern unsigned long long kpr_fwd_bytes;
 106 extern unsigned long      kpr_fwd_packets;
 107 extern unsigned long      kpr_fwd_errors;
 108 extern atomic_t           kpr_queue_depth;
 109
 110 #endif /* _KPLROUTER_H */