Slab API: remove useless ctor parameter and reorder parameters
[linux-3.10.git] / 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 version 2.
8  */
9
10 #include <linux/slab.h>
11 #include <linux/spinlock.h>
12 #include <linux/completion.h>
13 #include <linux/buffer_head.h>
14 #include <linux/module.h>
15 #include <linux/init.h>
16 #include <linux/gfs2_ondisk.h>
17 #include <linux/lm_interface.h>
18 #include <asm/atomic.h>
19
20 #include "gfs2.h"
21 #include "incore.h"
22 #include "ops_fstype.h"
23 #include "sys.h"
24 #include "util.h"
25 #include "glock.h"
26
27 static void gfs2_init_inode_once(struct kmem_cache *cachep, void *foo)
28 {
29         struct gfs2_inode *ip = foo;
30
31         inode_init_once(&ip->i_inode);
32         spin_lock_init(&ip->i_spin);
33         init_rwsem(&ip->i_rw_mutex);
34         memset(ip->i_cache, 0, sizeof(ip->i_cache));
35 }
36
37 static void gfs2_init_glock_once(struct kmem_cache *cachep, void *foo)
38 {
39         struct gfs2_glock *gl = foo;
40
41         INIT_HLIST_NODE(&gl->gl_list);
42         spin_lock_init(&gl->gl_spin);
43         INIT_LIST_HEAD(&gl->gl_holders);
44         INIT_LIST_HEAD(&gl->gl_waiters1);
45         INIT_LIST_HEAD(&gl->gl_waiters3);
46         gl->gl_lvb = NULL;
47         atomic_set(&gl->gl_lvb_count, 0);
48         INIT_LIST_HEAD(&gl->gl_reclaim);
49         INIT_LIST_HEAD(&gl->gl_ail_list);
50         atomic_set(&gl->gl_ail_count, 0);
51 }
52
53 /**
54  * init_gfs2_fs - Register GFS2 as a filesystem
55  *
56  * Returns: 0 on success, error code on failure
57  */
58
59 static int __init init_gfs2_fs(void)
60 {
61         int error;
62
63         error = gfs2_sys_init();
64         if (error)
65                 return error;
66
67         error = gfs2_glock_init();
68         if (error)
69                 goto fail;
70
71         error = -ENOMEM;
72         gfs2_glock_cachep = kmem_cache_create("gfs2_glock",
73                                               sizeof(struct gfs2_glock),
74                                               0, 0,
75                                               gfs2_init_glock_once);
76         if (!gfs2_glock_cachep)
77                 goto fail;
78
79         gfs2_inode_cachep = kmem_cache_create("gfs2_inode",
80                                               sizeof(struct gfs2_inode),
81                                               0,  SLAB_RECLAIM_ACCOUNT|
82                                                   SLAB_MEM_SPREAD,
83                                               gfs2_init_inode_once);
84         if (!gfs2_inode_cachep)
85                 goto fail;
86
87         gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata",
88                                                 sizeof(struct gfs2_bufdata),
89                                                 0, 0, NULL);
90         if (!gfs2_bufdata_cachep)
91                 goto fail;
92
93         error = register_filesystem(&gfs2_fs_type);
94         if (error)
95                 goto fail;
96
97         error = register_filesystem(&gfs2meta_fs_type);
98         if (error)
99                 goto fail_unregister;
100
101         gfs2_register_debugfs();
102
103         printk("GFS2 (built %s %s) installed\n", __DATE__, __TIME__);
104
105         return 0;
106
107 fail_unregister:
108         unregister_filesystem(&gfs2_fs_type);
109 fail:
110         gfs2_glock_exit();
111
112         if (gfs2_bufdata_cachep)
113                 kmem_cache_destroy(gfs2_bufdata_cachep);
114
115         if (gfs2_inode_cachep)
116                 kmem_cache_destroy(gfs2_inode_cachep);
117
118         if (gfs2_glock_cachep)
119                 kmem_cache_destroy(gfs2_glock_cachep);
120
121         gfs2_sys_uninit();
122         return error;
123 }
124
125 /**
126  * exit_gfs2_fs - Unregister the file system
127  *
128  */
129
130 static void __exit exit_gfs2_fs(void)
131 {
132         gfs2_glock_exit();
133         gfs2_unregister_debugfs();
134         unregister_filesystem(&gfs2_fs_type);
135         unregister_filesystem(&gfs2meta_fs_type);
136
137         kmem_cache_destroy(gfs2_bufdata_cachep);
138         kmem_cache_destroy(gfs2_inode_cachep);
139         kmem_cache_destroy(gfs2_glock_cachep);
140
141         gfs2_sys_uninit();
142 }
143
144 MODULE_DESCRIPTION("Global File System");
145 MODULE_AUTHOR("Red Hat, Inc.");
146 MODULE_LICENSE("GPL");
147
148 module_init(init_gfs2_fs);
149 module_exit(exit_gfs2_fs);
150