drivers/staging/lustre/lustre/ptlrpc/ptlrpc_module.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.gnu.org/licenses/gpl-2.0.html
  19  *
  20  * GPL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Use is subject to license terms.
  25  *
  26  * Copyright (c) 2011, 2012, Intel Corporation.
  27  */
  28 /*
  29  * This file is part of Lustre, http://www.lustre.org/
  30  * Lustre is a trademark of Sun Microsystems, Inc.
  31  */
  32
  33 #define DEBUG_SUBSYSTEM S_RPC
  34
  35 #include "../include/obd_support.h"
  36 #include "../include/obd_class.h"
  37 #include "../include/lustre_net.h"
  38 #include "../include/lustre_req_layout.h"
  39
  40 #include "ptlrpc_internal.h"
  41
  42 extern spinlock_t ptlrpc_last_xid_lock;
  43 #if RS_DEBUG
  44 extern spinlock_t ptlrpc_rs_debug_lock;
  45 #endif
  46
  47 static int __init ptlrpc_init(void)
  48 {
  49         int rc, cleanup_phase = 0;
  50
  51         lustre_assert_wire_constants();
  52 #if RS_DEBUG
  53         spin_lock_init(&ptlrpc_rs_debug_lock);
  54 #endif
  55         mutex_init(&ptlrpc_all_services_mutex);
  56         mutex_init(&pinger_mutex);
  57         mutex_init(&ptlrpcd_mutex);
  58         ptlrpc_init_xid();
  59
  60         rc = req_layout_init();
  61         if (rc)
  62                 return rc;
  63
  64         rc = ptlrpc_hr_init();
  65         if (rc)
  66                 return rc;
  67
  68         cleanup_phase = 1;
  69         rc = ptlrpc_request_cache_init();
  70         if (rc)
  71                 goto cleanup;
  72
  73         cleanup_phase = 2;
  74         rc = ptlrpc_init_portals();
  75         if (rc)
  76                 goto cleanup;
  77
  78         cleanup_phase = 3;
  79
  80         rc = ptlrpc_connection_init();
  81         if (rc)
  82                 goto cleanup;
  83
  84         cleanup_phase = 4;
  85         ptlrpc_put_connection_superhack = ptlrpc_connection_put;
  86
  87         rc = ptlrpc_start_pinger();
  88         if (rc)
  89                 goto cleanup;
  90
  91         cleanup_phase = 5;
  92         rc = ldlm_init();
  93         if (rc)
  94                 goto cleanup;
  95
  96         cleanup_phase = 6;
  97         rc = sptlrpc_init();
  98         if (rc)
  99                 goto cleanup;
 100
 101         cleanup_phase = 7;
 102         rc = ptlrpc_nrs_init();
 103         if (rc)
 104                 goto cleanup;
 105
 106         cleanup_phase = 8;
 107         rc = tgt_mod_init();
 108         if (rc)
 109                 goto cleanup;
 110         return 0;
 111
 112 cleanup:
 113         switch (cleanup_phase) {
 114         case 8:
 115                 ptlrpc_nrs_fini();
 116                 /* Fall through */
 117         case 7:
 118                 sptlrpc_fini();
 119                 /* Fall through */
 120         case 6:
 121                 ldlm_exit();
 122                 /* Fall through */
 123         case 5:
 124                 ptlrpc_stop_pinger();
 125                 /* Fall through */
 126         case 4:
 127                 ptlrpc_connection_fini();
 128                 /* Fall through */
 129         case 3:
 130                 ptlrpc_exit_portals();
 131                 /* Fall through */
 132         case 2:
 133                 ptlrpc_request_cache_fini();
 134                 /* Fall through */
 135         case 1:
 136                 ptlrpc_hr_fini();
 137                 req_layout_fini();
 138                 /* Fall through */
 139         default:
 140                 ;
 141         }
 142
 143         return rc;
 144 }
 145
 146 static void __exit ptlrpc_exit(void)
 147 {
 148         tgt_mod_exit();
 149         ptlrpc_nrs_fini();
 150         sptlrpc_fini();
 151         ldlm_exit();
 152         ptlrpc_stop_pinger();
 153         ptlrpc_exit_portals();
 154         ptlrpc_request_cache_fini();
 155         ptlrpc_hr_fini();
 156         ptlrpc_connection_fini();
 157 }
 158
 159 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
 160 MODULE_DESCRIPTION("Lustre Request Processor and Lock Management");
 161 MODULE_VERSION(LUSTRE_VERSION_STRING);
 162 MODULE_LICENSE("GPL");
 163
 164 module_init(ptlrpc_init);
 165 module_exit(ptlrpc_exit);