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 <linux/gfs2_ondisk.h>
  18 #include <asm/semaphore.h>
  19
  20 #include "gfs2.h"
  21 #include "lm_interface.h"
  22 #include "incore.h"
  23 #include "ops_fstype.h"
  24 #include "sys.h"
  25 #include "util.h"
  26
  27 /**
  28  * init_gfs2_fs - Register GFS2 as a filesystem
  29  *
  30  * Returns: 0 on success, error code on failure
  31  */
  32
  33 static int __init init_gfs2_fs(void)
  34 {
  35         int error;
  36
  37         gfs2_init_lmh();
  38
  39         error = gfs2_sys_init();
  40         if (error)
  41                 return error;
  42
  43         error = -ENOMEM;
  44
  45         gfs2_glock_cachep = kmem_cache_create("gfs2_glock",
  46                                               sizeof(struct gfs2_glock),
  47                                               0, 0, NULL, NULL);
  48         if (!gfs2_glock_cachep)
  49                 goto fail;
  50
  51         gfs2_inode_cachep = kmem_cache_create("gfs2_inode",
  52                                               sizeof(struct gfs2_inode),
  53                                               0, 0, NULL, NULL);
  54         if (!gfs2_inode_cachep)
  55                 goto fail;
  56
  57         gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata",
  58                                                 sizeof(struct gfs2_bufdata),
  59                                                 0, 0, NULL, NULL);
  60         if (!gfs2_bufdata_cachep)
  61                 goto fail;
  62
  63         error = register_filesystem(&gfs2_fs_type);
  64         if (error)
  65                 goto fail;
  66
  67         error = register_filesystem(&gfs2meta_fs_type);
  68         if (error)
  69                 goto fail_unregister;
  70
  71         printk("GFS2 (built %s %s) installed\n", __DATE__, __TIME__);
  72
  73         return 0;
  74
  75 fail_unregister:
  76         unregister_filesystem(&gfs2_fs_type);
  77 fail:
  78         if (gfs2_bufdata_cachep)
  79                 kmem_cache_destroy(gfs2_bufdata_cachep);
  80
  81         if (gfs2_inode_cachep)
  82                 kmem_cache_destroy(gfs2_inode_cachep);
  83
  84         if (gfs2_glock_cachep)
  85                 kmem_cache_destroy(gfs2_glock_cachep);
  86
  87         gfs2_sys_uninit();
  88         return error;
  89 }
  90
  91 /**
  92  * exit_gfs2_fs - Unregister the file system
  93  *
  94  */
  95
  96 static void __exit exit_gfs2_fs(void)
  97 {
  98         unregister_filesystem(&gfs2_fs_type);
  99         unregister_filesystem(&gfs2meta_fs_type);
 100
 101         kmem_cache_destroy(gfs2_bufdata_cachep);
 102         kmem_cache_destroy(gfs2_inode_cachep);
 103         kmem_cache_destroy(gfs2_glock_cachep);
 104
 105         gfs2_sys_uninit();
 106 }
 107
 108 MODULE_DESCRIPTION("Global File System");
 109 MODULE_AUTHOR("Red Hat, Inc.");
 110 MODULE_LICENSE("GPL");
 111
 112 module_init(init_gfs2_fs);
 113 module_exit(exit_gfs2_fs);
 114