fs/gfs2/main.c

   1 /*
   2  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
   3  * Copyright (C) 2004-2005 Red Hat, Inc.  All rights reserved.
   4  *
   5  * This copyrighted material is made available to anyone wishing to use,
   6  * modify, copy, or redistribute it subject to the terms and conditions
   7  * of the GNU General Public License v.2.
   8  */
   9
  10 #include <linux/sched.h>
  11 #include <linux/slab.h>
  12 #include <linux/spinlock.h>
  13 #include <linux/completion.h>
  14 #include <linux/buffer_head.h>
  15 #include <linux/module.h>
  16 #include <linux/init.h>
  17 #include <asm/semaphore.h>
  18
  19 #include "gfs2.h"
  20 #include "ops_fstype.h"
  21 #include "sys.h"
  22
  23 /**
  24  * init_gfs2_fs - Register GFS2 as a filesystem
  25  *
  26  * Returns: 0 on success, error code on failure
  27  */
  28
  29 static int __init init_gfs2_fs(void)
  30 {
  31         int error;
  32
  33         gfs2_init_lmh();
  34
  35         error = gfs2_sys_init();
  36         if (error)
  37                 return error;
  38
  39         error = -ENOMEM;
  40
  41         gfs2_glock_cachep = kmem_cache_create("gfs2_glock",
  42                                               sizeof(struct gfs2_glock),
  43                                               0, 0, NULL, NULL);
  44         if (!gfs2_glock_cachep)
  45                 goto fail;
  46
  47         gfs2_inode_cachep = kmem_cache_create("gfs2_inode",
  48                                               sizeof(struct gfs2_inode),
  49                                               0, 0, NULL, NULL);
  50         if (!gfs2_inode_cachep)
  51                 goto fail;
  52
  53         gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata",
  54                                                 sizeof(struct gfs2_bufdata),
  55                                                 0, 0, NULL, NULL);
  56         if (!gfs2_bufdata_cachep)
  57                 goto fail;
  58
  59         error = register_filesystem(&gfs2_fs_type);
  60         if (error)
  61                 goto fail;
  62
  63         printk("GFS2 (built %s %s) installed\n", __DATE__, __TIME__);
  64
  65         return 0;
  66
  67  fail:
  68         if (gfs2_bufdata_cachep)
  69                 kmem_cache_destroy(gfs2_bufdata_cachep);
  70
  71         if (gfs2_inode_cachep)
  72                 kmem_cache_destroy(gfs2_inode_cachep);
  73
  74         if (gfs2_glock_cachep)
  75                 kmem_cache_destroy(gfs2_glock_cachep);
  76
  77         gfs2_sys_uninit();
  78         return error;
  79 }
  80
  81 /**
  82  * exit_gfs2_fs - Unregister the file system
  83  *
  84  */
  85
  86 static void __exit exit_gfs2_fs(void)
  87 {
  88         unregister_filesystem(&gfs2_fs_type);
  89
  90         kmem_cache_destroy(gfs2_bufdata_cachep);
  91         kmem_cache_destroy(gfs2_inode_cachep);
  92         kmem_cache_destroy(gfs2_glock_cachep);
  93
  94         gfs2_sys_uninit();
  95 }
  96
  97 MODULE_DESCRIPTION("Global File System");
  98 MODULE_AUTHOR("Red Hat, Inc.");
  99 MODULE_LICENSE("GPL");
 100
 101 module_init(init_gfs2_fs);
 102 module_exit(exit_gfs2_fs);
 103