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
gfs2_init_inode_once(void * foo)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 INIT_LIST_HEAD(&ip->i_trunc_list);
34 ip->i_alloc = NULL;
35 }
36
gfs2_init_glock_once(void * foo)37 static void gfs2_init_glock_once(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 gl->gl_lvb = NULL;
45 atomic_set(&gl->gl_lvb_count, 0);
46 INIT_LIST_HEAD(&gl->gl_lru);
47 INIT_LIST_HEAD(&gl->gl_ail_list);
48 atomic_set(&gl->gl_ail_count, 0);
49 }
50
51 /**
52 * init_gfs2_fs - Register GFS2 as a filesystem
53 *
54 * Returns: 0 on success, error code on failure
55 */
56
init_gfs2_fs(void)57 static int __init init_gfs2_fs(void)
58 {
59 int error;
60
61 error = gfs2_sys_init();
62 if (error)
63 return error;
64
65 error = gfs2_glock_init();
66 if (error)
67 goto fail;
68
69 error = -ENOMEM;
70 gfs2_glock_cachep = kmem_cache_create("gfs2_glock",
71 sizeof(struct gfs2_glock),
72 0, 0,
73 gfs2_init_glock_once);
74 if (!gfs2_glock_cachep)
75 goto fail;
76
77 gfs2_inode_cachep = kmem_cache_create("gfs2_inode",
78 sizeof(struct gfs2_inode),
79 0, SLAB_RECLAIM_ACCOUNT|
80 SLAB_MEM_SPREAD,
81 gfs2_init_inode_once);
82 if (!gfs2_inode_cachep)
83 goto fail;
84
85 gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata",
86 sizeof(struct gfs2_bufdata),
87 0, 0, NULL);
88 if (!gfs2_bufdata_cachep)
89 goto fail;
90
91 gfs2_rgrpd_cachep = kmem_cache_create("gfs2_rgrpd",
92 sizeof(struct gfs2_rgrpd),
93 0, 0, NULL);
94 if (!gfs2_rgrpd_cachep)
95 goto fail;
96
97 gfs2_quotad_cachep = kmem_cache_create("gfs2_quotad",
98 sizeof(struct gfs2_quota_data),
99 0, 0, NULL);
100 if (!gfs2_quotad_cachep)
101 goto fail;
102
103 error = register_filesystem(&gfs2_fs_type);
104 if (error)
105 goto fail;
106
107 error = register_filesystem(&gfs2meta_fs_type);
108 if (error)
109 goto fail_unregister;
110
111 gfs2_register_debugfs();
112
113 printk("GFS2 (built %s %s) installed\n", __DATE__, __TIME__);
114
115 return 0;
116
117 fail_unregister:
118 unregister_filesystem(&gfs2_fs_type);
119 fail:
120 gfs2_glock_exit();
121
122 if (gfs2_quotad_cachep)
123 kmem_cache_destroy(gfs2_quotad_cachep);
124
125 if (gfs2_rgrpd_cachep)
126 kmem_cache_destroy(gfs2_rgrpd_cachep);
127
128 if (gfs2_bufdata_cachep)
129 kmem_cache_destroy(gfs2_bufdata_cachep);
130
131 if (gfs2_inode_cachep)
132 kmem_cache_destroy(gfs2_inode_cachep);
133
134 if (gfs2_glock_cachep)
135 kmem_cache_destroy(gfs2_glock_cachep);
136
137 gfs2_sys_uninit();
138 return error;
139 }
140
141 /**
142 * exit_gfs2_fs - Unregister the file system
143 *
144 */
145
exit_gfs2_fs(void)146 static void __exit exit_gfs2_fs(void)
147 {
148 gfs2_glock_exit();
149 gfs2_unregister_debugfs();
150 unregister_filesystem(&gfs2_fs_type);
151 unregister_filesystem(&gfs2meta_fs_type);
152
153 kmem_cache_destroy(gfs2_quotad_cachep);
154 kmem_cache_destroy(gfs2_rgrpd_cachep);
155 kmem_cache_destroy(gfs2_bufdata_cachep);
156 kmem_cache_destroy(gfs2_inode_cachep);
157 kmem_cache_destroy(gfs2_glock_cachep);
158
159 gfs2_sys_uninit();
160 }
161
162 MODULE_DESCRIPTION("Global File System");
163 MODULE_AUTHOR("Red Hat, Inc.");
164 MODULE_LICENSE("GPL");
165
166 module_init(init_gfs2_fs);
167 module_exit(exit_gfs2_fs);
168
169