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
  40 #include "../include/obd_support.h"
  41 #include "../include/obd_class.h"
  42 #include "../include/lustre_net.h"
  43 #include "../include/lustre_req_layout.h"
  44
  45 #include "ptlrpc_internal.h"
  46
  47 extern spinlock_t ptlrpc_last_xid_lock;
  48 #if RS_DEBUG
  49 extern spinlock_t ptlrpc_rs_debug_lock;
  50 #endif
  51 extern struct mutex pinger_mutex;
  52 extern struct mutex ptlrpcd_mutex;
  53
  54 __init int ptlrpc_init(void)
  55 {
  56         int rc, cleanup_phase = 0;
  57
  58         lustre_assert_wire_constants();
  59 #if RS_DEBUG
  60         spin_lock_init(&ptlrpc_rs_debug_lock);
  61 #endif
  62         mutex_init(&ptlrpc_all_services_mutex);
  63         mutex_init(&pinger_mutex);
  64         mutex_init(&ptlrpcd_mutex);
  65         ptlrpc_init_xid();
  66
  67         rc = req_layout_init();
  68         if (rc)
  69                 return rc;
  70
  71         rc = ptlrpc_hr_init();
  72         if (rc)
  73                 return rc;
  74
  75         cleanup_phase = 1;
  76         rc = ptlrpc_request_cache_init();
  77         if (rc)
  78                 goto cleanup;
  79
  80         cleanup_phase = 2;
  81         rc = ptlrpc_init_portals();
  82         if (rc)
  83                 goto cleanup;
  84
  85         cleanup_phase = 3;
  86
  87         rc = ptlrpc_connection_init();
  88         if (rc)
  89                 goto cleanup;
  90
  91         cleanup_phase = 4;
  92         ptlrpc_put_connection_superhack = ptlrpc_connection_put;
  93
  94         rc = ptlrpc_start_pinger();
  95         if (rc)
  96                 goto cleanup;
  97
  98         cleanup_phase = 5;
  99         rc = ldlm_init();
 100         if (rc)
 101                 goto cleanup;
 102
 103         cleanup_phase = 6;
 104         rc = sptlrpc_init();
 105         if (rc)
 106                 goto cleanup;
 107
 108         cleanup_phase = 7;
 109         rc = ptlrpc_nrs_init();
 110         if (rc)
 111                 goto cleanup;
 112
 113         cleanup_phase = 8;
 114         rc = tgt_mod_init();
 115         if (rc)
 116                 goto cleanup;
 117         return 0;
 118
 119 cleanup:
 120         switch (cleanup_phase) {
 121         case 8:
 122                 ptlrpc_nrs_fini();
 123                 /* Fall through */
 124         case 7:
 125                 sptlrpc_fini();
 126                 /* Fall through */
 127         case 6:
 128                 ldlm_exit();
 129                 /* Fall through */
 130         case 5:
 131                 ptlrpc_stop_pinger();
 132                 /* Fall through */
 133         case 4:
 134                 ptlrpc_connection_fini();
 135                 /* Fall through */
 136         case 3:
 137                 ptlrpc_exit_portals();
 138                 /* Fall through */
 139         case 2:
 140                 ptlrpc_request_cache_fini();
 141                 /* Fall through */
 142         case 1:
 143                 ptlrpc_hr_fini();
 144                 req_layout_fini();
 145                 /* Fall through */
 146         default: ;
 147         }
 148
 149         return rc;
 150 }
 151
 152 static void __exit ptlrpc_exit(void)
 153 {
 154         tgt_mod_exit();
 155         ptlrpc_nrs_fini();
 156         sptlrpc_fini();
 157         ldlm_exit();
 158         ptlrpc_stop_pinger();
 159         ptlrpc_exit_portals();
 160         ptlrpc_request_cache_fini();
 161         ptlrpc_hr_fini();
 162         ptlrpc_connection_fini();
 163 }
 164
 165 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
 166 MODULE_DESCRIPTION("Lustre Request Processor and Lock Management");
 167 MODULE_LICENSE("GPL");
 168 MODULE_VERSION("1.0.0");
 169
 170 module_init(ptlrpc_init);
 171 module_exit(ptlrpc_exit);