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/rcupdate.h>
18 #include <linux/rculist_bl.h>
19 #include <asm/atomic.h>
20
21 #include "gfs2.h"
22 #include "incore.h"
23 #include "super.h"
24 #include "sys.h"
25 #include "util.h"
26 #include "glock.h"
27 #include "quota.h"
28 #include "recovery.h"
29 #include "dir.h"
30
31 static struct shrinker qd_shrinker = {
32 .shrink = gfs2_shrink_qd_memory,
33 .seeks = DEFAULT_SEEKS,
34 };
35
gfs2_init_inode_once(void * foo)36 static void gfs2_init_inode_once(void *foo)
37 {
38 struct gfs2_inode *ip = foo;
39
40 inode_init_once(&ip->i_inode);
41 init_rwsem(&ip->i_rw_mutex);
42 INIT_LIST_HEAD(&ip->i_trunc_list);
43 ip->i_alloc = NULL;
44 }
45
gfs2_init_glock_once(void * foo)46 static void gfs2_init_glock_once(void *foo)
47 {
48 struct gfs2_glock *gl = foo;
49
50 INIT_HLIST_BL_NODE(&gl->gl_list);
51 spin_lock_init(&gl->gl_spin);
52 INIT_LIST_HEAD(&gl->gl_holders);
53 INIT_LIST_HEAD(&gl->gl_lru);
54 INIT_LIST_HEAD(&gl->gl_ail_list);
55 atomic_set(&gl->gl_ail_count, 0);
56 }
57
gfs2_init_gl_aspace_once(void * foo)58 static void gfs2_init_gl_aspace_once(void *foo)
59 {
60 struct gfs2_glock *gl = foo;
61 struct address_space *mapping = (struct address_space *)(gl + 1);
62
63 gfs2_init_glock_once(gl);
64 address_space_init_once(mapping);
65 }
66
67 /**
68 * init_gfs2_fs - Register GFS2 as a filesystem
69 *
70 * Returns: 0 on success, error code on failure
71 */
72
init_gfs2_fs(void)73 static int __init init_gfs2_fs(void)
74 {
75 int error;
76
77 gfs2_str2qstr(&gfs2_qdot, ".");
78 gfs2_str2qstr(&gfs2_qdotdot, "..");
79
80 error = gfs2_sys_init();
81 if (error)
82 return error;
83
84 error = gfs2_glock_init();
85 if (error)
86 goto fail;
87
88 error = -ENOMEM;
89 gfs2_glock_cachep = kmem_cache_create("gfs2_glock",
90 sizeof(struct gfs2_glock),
91 0, 0,
92 gfs2_init_glock_once);
93 if (!gfs2_glock_cachep)
94 goto fail;
95
96 gfs2_glock_aspace_cachep = kmem_cache_create("gfs2_glock(aspace)",
97 sizeof(struct gfs2_glock) +
98 sizeof(struct address_space),
99 0, 0, gfs2_init_gl_aspace_once);
100
101 if (!gfs2_glock_aspace_cachep)
102 goto fail;
103
104 gfs2_inode_cachep = kmem_cache_create("gfs2_inode",
105 sizeof(struct gfs2_inode),
106 0, SLAB_RECLAIM_ACCOUNT|
107 SLAB_MEM_SPREAD,
108 gfs2_init_inode_once);
109 if (!gfs2_inode_cachep)
110 goto fail;
111
112 gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata",
113 sizeof(struct gfs2_bufdata),
114 0, 0, NULL);
115 if (!gfs2_bufdata_cachep)
116 goto fail;
117
118 gfs2_rgrpd_cachep = kmem_cache_create("gfs2_rgrpd",
119 sizeof(struct gfs2_rgrpd),
120 0, 0, NULL);
121 if (!gfs2_rgrpd_cachep)
122 goto fail;
123
124 gfs2_quotad_cachep = kmem_cache_create("gfs2_quotad",
125 sizeof(struct gfs2_quota_data),
126 0, 0, NULL);
127 if (!gfs2_quotad_cachep)
128 goto fail;
129
130 register_shrinker(&qd_shrinker);
131
132 error = register_filesystem(&gfs2_fs_type);
133 if (error)
134 goto fail;
135
136 error = register_filesystem(&gfs2meta_fs_type);
137 if (error)
138 goto fail_unregister;
139
140 error = -ENOMEM;
141 gfs_recovery_wq = alloc_workqueue("gfs_recovery",
142 WQ_MEM_RECLAIM | WQ_FREEZABLE, 0);
143 if (!gfs_recovery_wq)
144 goto fail_wq;
145
146 gfs2_register_debugfs();
147
148 printk("GFS2 (built %s %s) installed\n", __DATE__, __TIME__);
149
150 return 0;
151
152 fail_wq:
153 unregister_filesystem(&gfs2meta_fs_type);
154 fail_unregister:
155 unregister_filesystem(&gfs2_fs_type);
156 fail:
157 unregister_shrinker(&qd_shrinker);
158 gfs2_glock_exit();
159
160 if (gfs2_quotad_cachep)
161 kmem_cache_destroy(gfs2_quotad_cachep);
162
163 if (gfs2_rgrpd_cachep)
164 kmem_cache_destroy(gfs2_rgrpd_cachep);
165
166 if (gfs2_bufdata_cachep)
167 kmem_cache_destroy(gfs2_bufdata_cachep);
168
169 if (gfs2_inode_cachep)
170 kmem_cache_destroy(gfs2_inode_cachep);
171
172 if (gfs2_glock_aspace_cachep)
173 kmem_cache_destroy(gfs2_glock_aspace_cachep);
174
175 if (gfs2_glock_cachep)
176 kmem_cache_destroy(gfs2_glock_cachep);
177
178 gfs2_sys_uninit();
179 return error;
180 }
181
182 /**
183 * exit_gfs2_fs - Unregister the file system
184 *
185 */
186
exit_gfs2_fs(void)187 static void __exit exit_gfs2_fs(void)
188 {
189 unregister_shrinker(&qd_shrinker);
190 gfs2_glock_exit();
191 gfs2_unregister_debugfs();
192 unregister_filesystem(&gfs2_fs_type);
193 unregister_filesystem(&gfs2meta_fs_type);
194 destroy_workqueue(gfs_recovery_wq);
195
196 rcu_barrier();
197
198 kmem_cache_destroy(gfs2_quotad_cachep);
199 kmem_cache_destroy(gfs2_rgrpd_cachep);
200 kmem_cache_destroy(gfs2_bufdata_cachep);
201 kmem_cache_destroy(gfs2_inode_cachep);
202 kmem_cache_destroy(gfs2_glock_aspace_cachep);
203 kmem_cache_destroy(gfs2_glock_cachep);
204
205 gfs2_sys_uninit();
206 }
207
208 MODULE_DESCRIPTION("Global File System");
209 MODULE_AUTHOR("Red Hat, Inc.");
210 MODULE_LICENSE("GPL");
211
212 module_init(init_gfs2_fs);
213 module_exit(exit_gfs2_fs);
214
215