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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 <linux/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
31struct workqueue_struct *gfs2_control_wq;
32
33static struct shrinker qd_shrinker = {
34 .shrink = gfs2_shrink_qd_memory,
35 .seeks = DEFAULT_SEEKS,
36};
37
38static void gfs2_init_inode_once(void *foo)
39{
40 struct gfs2_inode *ip = foo;
41
42 inode_init_once(&ip->i_inode);
43 init_rwsem(&ip->i_rw_mutex);
44 INIT_LIST_HEAD(&ip->i_trunc_list);
45 ip->i_qadata = NULL;
46 ip->i_res = NULL;
47 ip->i_hash_cache = NULL;
48}
49
50static void gfs2_init_glock_once(void *foo)
51{
52 struct gfs2_glock *gl = foo;
53
54 INIT_HLIST_BL_NODE(&gl->gl_list);
55 spin_lock_init(&gl->gl_spin);
56 INIT_LIST_HEAD(&gl->gl_holders);
57 INIT_LIST_HEAD(&gl->gl_lru);
58 INIT_LIST_HEAD(&gl->gl_ail_list);
59 atomic_set(&gl->gl_ail_count, 0);
60 atomic_set(&gl->gl_revokes, 0);
61}
62
63static void gfs2_init_gl_aspace_once(void *foo)
64{
65 struct gfs2_glock *gl = foo;
66 struct address_space *mapping = (struct address_space *)(gl + 1);
67
68 gfs2_init_glock_once(gl);
69 address_space_init_once(mapping);
70}
71
72
73
74
75
76
77
78static int __init init_gfs2_fs(void)
79{
80 int error;
81
82 gfs2_str2qstr(&gfs2_qdot, ".");
83 gfs2_str2qstr(&gfs2_qdotdot, "..");
84
85 error = gfs2_sys_init();
86 if (error)
87 return error;
88
89 error = gfs2_glock_init();
90 if (error)
91 goto fail;
92
93 error = -ENOMEM;
94 gfs2_glock_cachep = kmem_cache_create("gfs2_glock",
95 sizeof(struct gfs2_glock),
96 0, 0,
97 gfs2_init_glock_once);
98 if (!gfs2_glock_cachep)
99 goto fail;
100
101 gfs2_glock_aspace_cachep = kmem_cache_create("gfs2_glock(aspace)",
102 sizeof(struct gfs2_glock) +
103 sizeof(struct address_space),
104 0, 0, gfs2_init_gl_aspace_once);
105
106 if (!gfs2_glock_aspace_cachep)
107 goto fail;
108
109 gfs2_inode_cachep = kmem_cache_create("gfs2_inode",
110 sizeof(struct gfs2_inode),
111 0, SLAB_RECLAIM_ACCOUNT|
112 SLAB_MEM_SPREAD,
113 gfs2_init_inode_once);
114 if (!gfs2_inode_cachep)
115 goto fail;
116
117 gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata",
118 sizeof(struct gfs2_bufdata),
119 0, 0, NULL);
120 if (!gfs2_bufdata_cachep)
121 goto fail;
122
123 gfs2_rgrpd_cachep = kmem_cache_create("gfs2_rgrpd",
124 sizeof(struct gfs2_rgrpd),
125 0, 0, NULL);
126 if (!gfs2_rgrpd_cachep)
127 goto fail;
128
129 gfs2_quotad_cachep = kmem_cache_create("gfs2_quotad",
130 sizeof(struct gfs2_quota_data),
131 0, 0, NULL);
132 if (!gfs2_quotad_cachep)
133 goto fail;
134
135 register_shrinker(&qd_shrinker);
136
137 error = register_filesystem(&gfs2_fs_type);
138 if (error)
139 goto fail;
140
141 error = register_filesystem(&gfs2meta_fs_type);
142 if (error)
143 goto fail_unregister;
144
145 error = -ENOMEM;
146 gfs_recovery_wq = alloc_workqueue("gfs_recovery",
147 WQ_MEM_RECLAIM | WQ_FREEZABLE, 0);
148 if (!gfs_recovery_wq)
149 goto fail_wq;
150
151 gfs2_control_wq = alloc_workqueue("gfs2_control",
152 WQ_NON_REENTRANT | WQ_UNBOUND | WQ_FREEZABLE, 0);
153 if (!gfs2_control_wq)
154 goto fail_control;
155
156 gfs2_register_debugfs();
157
158 printk("GFS2 installed\n");
159
160 return 0;
161
162fail_control:
163 destroy_workqueue(gfs_recovery_wq);
164fail_wq:
165 unregister_filesystem(&gfs2meta_fs_type);
166fail_unregister:
167 unregister_filesystem(&gfs2_fs_type);
168fail:
169 unregister_shrinker(&qd_shrinker);
170 gfs2_glock_exit();
171
172 if (gfs2_quotad_cachep)
173 kmem_cache_destroy(gfs2_quotad_cachep);
174
175 if (gfs2_rgrpd_cachep)
176 kmem_cache_destroy(gfs2_rgrpd_cachep);
177
178 if (gfs2_bufdata_cachep)
179 kmem_cache_destroy(gfs2_bufdata_cachep);
180
181 if (gfs2_inode_cachep)
182 kmem_cache_destroy(gfs2_inode_cachep);
183
184 if (gfs2_glock_aspace_cachep)
185 kmem_cache_destroy(gfs2_glock_aspace_cachep);
186
187 if (gfs2_glock_cachep)
188 kmem_cache_destroy(gfs2_glock_cachep);
189
190 gfs2_sys_uninit();
191 return error;
192}
193
194
195
196
197
198
199static void __exit exit_gfs2_fs(void)
200{
201 unregister_shrinker(&qd_shrinker);
202 gfs2_glock_exit();
203 gfs2_unregister_debugfs();
204 unregister_filesystem(&gfs2_fs_type);
205 unregister_filesystem(&gfs2meta_fs_type);
206 destroy_workqueue(gfs_recovery_wq);
207 destroy_workqueue(gfs2_control_wq);
208
209 rcu_barrier();
210
211 kmem_cache_destroy(gfs2_quotad_cachep);
212 kmem_cache_destroy(gfs2_rgrpd_cachep);
213 kmem_cache_destroy(gfs2_bufdata_cachep);
214 kmem_cache_destroy(gfs2_inode_cachep);
215 kmem_cache_destroy(gfs2_glock_aspace_cachep);
216 kmem_cache_destroy(gfs2_glock_cachep);
217
218 gfs2_sys_uninit();
219}
220
221MODULE_DESCRIPTION("Global File System");
222MODULE_AUTHOR("Red Hat, Inc.");
223MODULE_LICENSE("GPL");
224
225module_init(init_gfs2_fs);
226module_exit(exit_gfs2_fs);
227
228
