b0a4582e78db0c4d28bd8fe53aef982c8167e37c
[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 <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