fs/dlm/main.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /******************************************************************************
   3 *******************************************************************************
   4 **
   5 **  Copyright (C) Sistina Software, Inc.  1997-2003  All rights reserved.
   6 **  Copyright (C) 2004-2007 Red Hat, Inc.  All rights reserved.
   7 **
   8 **
   9 *******************************************************************************
  10 ******************************************************************************/
  11
  12 #include <linux/module.h>
  13
  14 #include "dlm_internal.h"
  15 #include "lockspace.h"
  16 #include "lock.h"
  17 #include "user.h"
  18 #include "memory.h"
  19 #include "config.h"
  20 #include "midcomms.h"
  21
  22 #define CREATE_TRACE_POINTS
  23 #include <trace/events/dlm.h>
  24
  25 struct workqueue_struct *dlm_wq;
  26
  27 static int __init init_dlm(void)
  28 {
  29         int error;
  30
  31         error = dlm_memory_init();
  32         if (error)
  33                 goto out;
  34
  35         dlm_midcomms_init();
  36
  37         error = dlm_lockspace_init();
  38         if (error)
  39                 goto out_mem;
  40
  41         error = dlm_config_init();
  42         if (error)
  43                 goto out_lockspace;
  44
  45         dlm_register_debugfs();
  46
  47         error = dlm_user_init();
  48         if (error)
  49                 goto out_debug;
  50
  51         error = dlm_plock_init();
  52         if (error)
  53                 goto out_user;
  54
  55         dlm_wq = alloc_workqueue("dlm_wq", 0, 0);
  56         if (!dlm_wq) {
  57                 error = -ENOMEM;
  58                 goto out_plock;
  59         }
  60
  61         printk("DLM installed\n");
  62
  63         return 0;
  64
  65  out_plock:
  66         dlm_plock_exit();
  67  out_user:
  68         dlm_user_exit();
  69  out_debug:
  70         dlm_unregister_debugfs();
  71         dlm_config_exit();
  72  out_lockspace:
  73         dlm_lockspace_exit();
  74  out_mem:
  75         dlm_midcomms_exit();
  76         dlm_memory_exit();
  77  out:
  78         return error;
  79 }
  80
  81 static void __exit exit_dlm(void)
  82 {
  83         /* be sure every pending work e.g. freeing is done */
  84         destroy_workqueue(dlm_wq);
  85         dlm_plock_exit();
  86         dlm_user_exit();
  87         dlm_config_exit();
  88         dlm_lockspace_exit();
  89         dlm_midcomms_exit();
  90         dlm_unregister_debugfs();
  91         dlm_memory_exit();
  92 }
  93
  94 module_init(init_dlm);
  95 module_exit(exit_dlm);
  96
  97 MODULE_DESCRIPTION("Distributed Lock Manager");
  98 MODULE_AUTHOR("Red Hat, Inc.");
  99 MODULE_LICENSE("GPL");
 100
 101 EXPORT_SYMBOL_GPL(dlm_new_lockspace);
 102 EXPORT_SYMBOL_GPL(dlm_release_lockspace);
 103 EXPORT_SYMBOL_GPL(dlm_lock);
 104 EXPORT_SYMBOL_GPL(dlm_unlock);
 105