kernel/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.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, 2012, Intel Corporation.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  */
  36
  37 #define DEBUG_SUBSYSTEM S_RPC
  38
  39 #include "../include/obd_support.h"
  40 #include "../include/obd_class.h"
  41 #include "../include/lustre_net.h"
  42 #include "../include/lustre_req_layout.h"
  43
  44 #include "ptlrpc_internal.h"
  45
  46 extern spinlock_t ptlrpc_last_xid_lock;
  47 #if RS_DEBUG
  48 extern spinlock_t ptlrpc_rs_debug_lock;
  49 #endif
  50
  51 static int __init ptlrpc_init(void)
  52 {
  53         int rc, cleanup_phase = 0;
  54
  55         lustre_assert_wire_constants();
  56 #if RS_DEBUG
  57         spin_lock_init(&ptlrpc_rs_debug_lock);
  58 #endif
  59         mutex_init(&ptlrpc_all_services_mutex);
  60         mutex_init(&pinger_mutex);
  61         mutex_init(&ptlrpcd_mutex);
  62         ptlrpc_init_xid();
  63
  64         rc = req_layout_init();
  65         if (rc)
  66                 return rc;
  67
  68         rc = ptlrpc_hr_init();
  69         if (rc)
  70                 return rc;
  71
  72         cleanup_phase = 1;
  73         rc = ptlrpc_request_cache_init();
  74         if (rc)
  75                 goto cleanup;
  76
  77         cleanup_phase = 2;
  78         rc = ptlrpc_init_portals();
  79         if (rc)
  80                 goto cleanup;
  81
  82         cleanup_phase = 3;
  83
  84         rc = ptlrpc_connection_init();
  85         if (rc)
  86                 goto cleanup;
  87
  88         cleanup_phase = 4;
  89         ptlrpc_put_connection_superhack = ptlrpc_connection_put;
  90
  91         rc = ptlrpc_start_pinger();
  92         if (rc)
  93                 goto cleanup;
  94
  95         cleanup_phase = 5;
  96         rc = ldlm_init();
  97         if (rc)
  98                 goto cleanup;
  99
 100         cleanup_phase = 6;
 101         rc = sptlrpc_init();
 102         if (rc)
 103                 goto cleanup;
 104
 105         cleanup_phase = 7;
 106         rc = ptlrpc_nrs_init();
 107         if (rc)
 108                 goto cleanup;
 109
 110         cleanup_phase = 8;
 111         rc = tgt_mod_init();
 112         if (rc)
 113                 goto cleanup;
 114         return 0;
 115
 116 cleanup:
 117         switch (cleanup_phase) {
 118         case 8:
 119                 ptlrpc_nrs_fini();
 120                 /* Fall through */
 121         case 7:
 122                 sptlrpc_fini();
 123                 /* Fall through */
 124         case 6:
 125                 ldlm_exit();
 126                 /* Fall through */
 127         case 5:
 128                 ptlrpc_stop_pinger();
 129                 /* Fall through */
 130         case 4:
 131                 ptlrpc_connection_fini();
 132                 /* Fall through */
 133         case 3:
 134                 ptlrpc_exit_portals();
 135                 /* Fall through */
 136         case 2:
 137                 ptlrpc_request_cache_fini();
 138                 /* Fall through */
 139         case 1:
 140                 ptlrpc_hr_fini();
 141                 req_layout_fini();
 142                 /* Fall through */
 143         default:
 144                 ;
 145         }
 146
 147         return rc;
 148 }
 149
 150 static void __exit ptlrpc_exit(void)
 151 {
 152         tgt_mod_exit();
 153         ptlrpc_nrs_fini();
 154         sptlrpc_fini();
 155         ldlm_exit();
 156         ptlrpc_stop_pinger();
 157         ptlrpc_exit_portals();
 158         ptlrpc_request_cache_fini();
 159         ptlrpc_hr_fini();
 160         ptlrpc_connection_fini();
 161 }
 162
 163 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
 164 MODULE_DESCRIPTION("Lustre Request Processor and Lock Management");
 165 MODULE_LICENSE("GPL");
 166 MODULE_VERSION("1.0.0");
 167
 168 module_init(ptlrpc_init);
 169 module_exit(ptlrpc_exit);