[GFS2] The core of GFS2
[linux-2.6.git] / 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