fs/gfs2/main.c

   1 /*
   2  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
   3  * Copyright (C) 2004-2006 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 <linux/gfs2_ondisk.h>
  18
  19 #include "gfs2.h"
  20 #include "lm_interface.h"
  21 #include "incore.h"
  22 #include "ops_fstype.h"
  23 #include "sys.h"
  24 #include "util.h"
  25
  26 /**
  27  * init_gfs2_fs - Register GFS2 as a filesystem
  28  *
  29  * Returns: 0 on success, error code on failure
  30  */
  31
  32 static int __init init_gfs2_fs(void)
  33 {
  34         int error;
  35
  36         gfs2_init_lmh();
  37
  38         error = gfs2_sys_init();
  39         if (error)
  40                 return error;
  41
  42         error = -ENOMEM;
  43
  44         gfs2_glock_cachep = kmem_cache_create("gfs2_glock",
  45                                               sizeof(struct gfs2_glock),
  46                                               0, 0, NULL, NULL);
  47         if (!gfs2_glock_cachep)
  48                 goto fail;
  49
  50         gfs2_inode_cachep = kmem_cache_create("gfs2_inode",
  51                                               sizeof(struct gfs2_inode),
  52                                               0, 0, NULL, NULL);
  53         if (!gfs2_inode_cachep)
  54                 goto fail;
  55
  56         gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata",
  57                                                 sizeof(struct gfs2_bufdata),
  58                                                 0, 0, NULL, NULL);
  59         if (!gfs2_bufdata_cachep)
  60                 goto fail;
  61
  62         error = register_filesystem(&gfs2_fs_type);
  63         if (error)
  64                 goto fail;
  65
  66         error = register_filesystem(&gfs2meta_fs_type);
  67         if (error)
  68                 goto fail_unregister;
  69
  70         printk("GFS2 (built %s %s) installed\n", __DATE__, __TIME__);
  71
  72         return 0;
  73
  74 fail_unregister:
  75         unregister_filesystem(&gfs2_fs_type);
  76 fail:
  77         if (gfs2_bufdata_cachep)
  78                 kmem_cache_destroy(gfs2_bufdata_cachep);
  79
  80         if (gfs2_inode_cachep)
  81                 kmem_cache_destroy(gfs2_inode_cachep);
  82
  83         if (gfs2_glock_cachep)
  84                 kmem_cache_destroy(gfs2_glock_cachep);
  85
  86         gfs2_sys_uninit();
  87         return error;
  88 }
  89
  90 /**
  91  * exit_gfs2_fs - Unregister the file system
  92  *
  93  */
  94
  95 static void __exit exit_gfs2_fs(void)
  96 {
  97         unregister_filesystem(&gfs2_fs_type);
  98         unregister_filesystem(&gfs2meta_fs_type);
  99
 100         kmem_cache_destroy(gfs2_bufdata_cachep);
 101         kmem_cache_destroy(gfs2_inode_cachep);
 102         kmem_cache_destroy(gfs2_glock_cachep);
 103
 104         gfs2_sys_uninit();
 105 }
 106
 107 MODULE_DESCRIPTION("Global File System");
 108 MODULE_AUTHOR("Red Hat, Inc.");
 109 MODULE_LICENSE("GPL");
 110
 111 module_init(init_gfs2_fs);
 112 module_exit(exit_gfs2_fs);
 113