GFS2: Clean up & move gfs2_quotad
[linux-2.6.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 "super.h"
23 #include "sys.h"
24 #include "util.h"
25 #include "glock.h"
26
27 static void gfs2_init_inode_once(void *foo)
28 {
29         struct gfs2_inode *ip = foo;
30
31         inode_init_once(&ip->i_inode);
32         init_rwsem(&ip->i_rw_mutex);
33         ip->i_alloc = NULL;
34 }
35
36 static void gfs2_init_glock_once(void *foo)
37 {
38         struct gfs2_glock *gl = foo;
39
40         INIT_HLIST_NODE(&gl->gl_list);
41         spin_lock_init(&gl->gl_spin);
42         INIT_LIST_HEAD(&gl->gl_holders);
43         gl->gl_lvb = NULL;
44         atomic_set(&gl->gl_lvb_count, 0);
45         INIT_LIST_HEAD(&gl->gl_reclaim);
46         INIT_LIST_HEAD(&gl->gl_ail_list);
47         atomic_set(&gl->gl_ail_count, 0);
48 }
49
50 /**
51  * init_gfs2_fs - Register GFS2 as a filesystem
52  *
53  * Returns: 0 on success, error code on failure
54  */
55
56 static int __init init_gfs2_fs(void)
57 {
58         int error;
59
60         error = gfs2_sys_init();
61         if (error)
62                 return error;
63
64         error = gfs2_glock_init();
65         if (error)
66                 goto fail;
67
68         error = -ENOMEM;
69         gfs2_glock_cachep = kmem_cache_create("gfs2_glock",
70                                               sizeof(struct gfs2_glock),
71                                               0, 0,
72                                               gfs2_init_glock_once);
73         if (!gfs2_glock_cachep)
74                 goto fail;
75
76         gfs2_inode_cachep = kmem_cache_create("gfs2_inode",
77                                               sizeof(struct gfs2_inode),
78                                               0,  SLAB_RECLAIM_ACCOUNT|
79                                                   SLAB_MEM_SPREAD,
80                                               gfs2_init_inode_once);
81         if (!gfs2_inode_cachep)
82                 goto fail;
83
84         gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata",
85                                                 sizeof(struct gfs2_bufdata),
86                                                 0, 0, NULL);
87         if (!gfs2_bufdata_cachep)
88                 goto fail;
89
90         gfs2_rgrpd_cachep = kmem_cache_create("gfs2_rgrpd",
91                                               sizeof(struct gfs2_rgrpd),
92                                               0, 0, NULL);
93         if (!gfs2_rgrpd_cachep)
94                 goto fail;
95
96         gfs2_quotad_cachep = kmem_cache_create("gfs2_quotad",
97                                                sizeof(struct gfs2_quota_data),
98                                                0, 0, NULL);
99         if (!gfs2_quotad_cachep)
100                 goto fail;
101
102         error = register_filesystem(&gfs2_fs_type);
103         if (error)
104                 goto fail;
105
106         error = register_filesystem(&gfs2meta_fs_type);
107         if (error)
108                 goto fail_unregister;
109
110         gfs2_register_debugfs();
111
112         printk("GFS2 (built %s %s) installed\n", __DATE__, __TIME__);
113
114         return 0;
115
116 fail_unregister:
117         unregister_filesystem(&gfs2_fs_type);
118 fail:
119         gfs2_glock_exit();
120
121         if (gfs2_quotad_cachep)
122                 kmem_cache_destroy(gfs2_quotad_cachep);
123
124         if (gfs2_rgrpd_cachep)
125                 kmem_cache_destroy(gfs2_rgrpd_cachep);
126
127         if (gfs2_bufdata_cachep)
128                 kmem_cache_destroy(gfs2_bufdata_cachep);
129
130         if (gfs2_inode_cachep)
131                 kmem_cache_destroy(gfs2_inode_cachep);
132
133         if (gfs2_glock_cachep)
134                 kmem_cache_destroy(gfs2_glock_cachep);
135
136         gfs2_sys_uninit();
137         return error;
138 }
139
140 /**
141  * exit_gfs2_fs - Unregister the file system
142  *
143  */
144
145 static void __exit exit_gfs2_fs(void)
146 {
147         gfs2_glock_exit();
148         gfs2_unregister_debugfs();
149         unregister_filesystem(&gfs2_fs_type);
150         unregister_filesystem(&gfs2meta_fs_type);
151
152         kmem_cache_destroy(gfs2_quotad_cachep);
153         kmem_cache_destroy(gfs2_rgrpd_cachep);
154         kmem_cache_destroy(gfs2_bufdata_cachep);
155         kmem_cache_destroy(gfs2_inode_cachep);
156         kmem_cache_destroy(gfs2_glock_cachep);
157
158         gfs2_sys_uninit();
159 }
160
161 MODULE_DESCRIPTION("Global File System");
162 MODULE_AUTHOR("Red Hat, Inc.");
163 MODULE_LICENSE("GPL");
164
165 module_init(init_gfs2_fs);
166 module_exit(exit_gfs2_fs);
167