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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#include <linux/mempool.h>
21
22#include "gfs2.h"
23#include "incore.h"
24#include "super.h"
25#include "sys.h"
26#include "util.h"
27#include "glock.h"
28#include "quota.h"
29#include "recovery.h"
30#include "dir.h"
31
32struct workqueue_struct *gfs2_control_wq;
33
34static struct shrinker qd_shrinker = {
35 .shrink = gfs2_shrink_qd_memory,
36 .seeks = DEFAULT_SEEKS,
37};
38
39static void gfs2_init_inode_once(void *foo)
40{
41 struct gfs2_inode *ip = foo;
42
43 inode_init_once(&ip->i_inode);
44 init_rwsem(&ip->i_rw_mutex);
45 INIT_LIST_HEAD(&ip->i_trunc_list);
46 ip->i_qadata = NULL;
47 ip->i_res = NULL;
48 ip->i_hash_cache = NULL;
49}
50
51static void gfs2_init_glock_once(void *foo)
52{
53 struct gfs2_glock *gl = foo;
54
55 INIT_HLIST_BL_NODE(&gl->gl_list);
56 spin_lock_init(&gl->gl_spin);
57 INIT_LIST_HEAD(&gl->gl_holders);
58 INIT_LIST_HEAD(&gl->gl_lru);
59 INIT_LIST_HEAD(&gl->gl_ail_list);
60 atomic_set(&gl->gl_ail_count, 0);
61 atomic_set(&gl->gl_revokes, 0);
62}
63
64static void gfs2_init_gl_aspace_once(void *foo)
65{
66 struct gfs2_glock *gl = foo;
67 struct address_space *mapping = (struct address_space *)(gl + 1);
68
69 gfs2_init_glock_once(gl);
70 address_space_init_once(mapping);
71}
72
73static void *gfs2_bh_alloc(gfp_t mask, void *data)
74{
75 return alloc_buffer_head(mask);
76}
77
78static void gfs2_bh_free(void *ptr, void *data)
79{
80 return free_buffer_head(ptr);
81}
82
83
84
85
86
87
88
89static int __init init_gfs2_fs(void)
90{
91 int error;
92
93 gfs2_str2qstr(&gfs2_qdot, ".");
94 gfs2_str2qstr(&gfs2_qdotdot, "..");
95
96 error = gfs2_sys_init();
97 if (error)
98 return error;
99
100 error = gfs2_glock_init();
101 if (error)
102 goto fail;
103
104 error = -ENOMEM;
105 gfs2_glock_cachep = kmem_cache_create("gfs2_glock",
106 sizeof(struct gfs2_glock),
107 0, 0,
108 gfs2_init_glock_once);
109 if (!gfs2_glock_cachep)
110 goto fail;
111
112 gfs2_glock_aspace_cachep = kmem_cache_create("gfs2_glock(aspace)",
113 sizeof(struct gfs2_glock) +
114 sizeof(struct address_space),
115 0, 0, gfs2_init_gl_aspace_once);
116
117 if (!gfs2_glock_aspace_cachep)
118 goto fail;
119
120 gfs2_inode_cachep = kmem_cache_create("gfs2_inode",
121 sizeof(struct gfs2_inode),
122 0, SLAB_RECLAIM_ACCOUNT|
123 SLAB_MEM_SPREAD,
124 gfs2_init_inode_once);
125 if (!gfs2_inode_cachep)
126 goto fail;
127
128 gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata",
129 sizeof(struct gfs2_bufdata),
130 0, 0, NULL);
131 if (!gfs2_bufdata_cachep)
132 goto fail;
133
134 gfs2_rgrpd_cachep = kmem_cache_create("gfs2_rgrpd",
135 sizeof(struct gfs2_rgrpd),
136 0, 0, NULL);
137 if (!gfs2_rgrpd_cachep)
138 goto fail;
139
140 gfs2_quotad_cachep = kmem_cache_create("gfs2_quotad",
141 sizeof(struct gfs2_quota_data),
142 0, 0, NULL);
143 if (!gfs2_quotad_cachep)
144 goto fail;
145
146 register_shrinker(&qd_shrinker);
147
148 error = register_filesystem(&gfs2_fs_type);
149 if (error)
150 goto fail;
151
152 error = register_filesystem(&gfs2meta_fs_type);
153 if (error)
154 goto fail_unregister;
155
156 error = -ENOMEM;
157 gfs_recovery_wq = alloc_workqueue("gfs_recovery",
158 WQ_MEM_RECLAIM | WQ_FREEZABLE, 0);
159 if (!gfs_recovery_wq)
160 goto fail_wq;
161
162 gfs2_control_wq = alloc_workqueue("gfs2_control",
163 WQ_NON_REENTRANT | WQ_UNBOUND | WQ_FREEZABLE, 0);
164 if (!gfs2_control_wq)
165 goto fail_recovery;
166
167 gfs2_bh_pool = mempool_create(1024, gfs2_bh_alloc, gfs2_bh_free, NULL);
168 if (!gfs2_bh_pool)
169 goto fail_control;
170
171 gfs2_register_debugfs();
172
173 printk("GFS2 installed\n");
174
175 return 0;
176
177fail_control:
178 destroy_workqueue(gfs2_control_wq);
179fail_recovery:
180 destroy_workqueue(gfs_recovery_wq);
181fail_wq:
182 unregister_filesystem(&gfs2meta_fs_type);
183fail_unregister:
184 unregister_filesystem(&gfs2_fs_type);
185fail:
186 unregister_shrinker(&qd_shrinker);
187 gfs2_glock_exit();
188
189 if (gfs2_quotad_cachep)
190 kmem_cache_destroy(gfs2_quotad_cachep);
191
192 if (gfs2_rgrpd_cachep)
193 kmem_cache_destroy(gfs2_rgrpd_cachep);
194
195 if (gfs2_bufdata_cachep)
196 kmem_cache_destroy(gfs2_bufdata_cachep);
197
198 if (gfs2_inode_cachep)
199 kmem_cache_destroy(gfs2_inode_cachep);
200
201 if (gfs2_glock_aspace_cachep)
202 kmem_cache_destroy(gfs2_glock_aspace_cachep);
203
204 if (gfs2_glock_cachep)
205 kmem_cache_destroy(gfs2_glock_cachep);
206
207 gfs2_sys_uninit();
208 return error;
209}
210
211
212
213
214
215
216static void __exit exit_gfs2_fs(void)
217{
218 unregister_shrinker(&qd_shrinker);
219 gfs2_glock_exit();
220 gfs2_unregister_debugfs();
221 unregister_filesystem(&gfs2_fs_type);
222 unregister_filesystem(&gfs2meta_fs_type);
223 destroy_workqueue(gfs_recovery_wq);
224 destroy_workqueue(gfs2_control_wq);
225
226 rcu_barrier();
227
228 mempool_destroy(gfs2_bh_pool);
229 kmem_cache_destroy(gfs2_quotad_cachep);
230 kmem_cache_destroy(gfs2_rgrpd_cachep);
231 kmem_cache_destroy(gfs2_bufdata_cachep);
232 kmem_cache_destroy(gfs2_inode_cachep);
233 kmem_cache_destroy(gfs2_glock_aspace_cachep);
234 kmem_cache_destroy(gfs2_glock_cachep);
235
236 gfs2_sys_uninit();
237}
238
239MODULE_DESCRIPTION("Global File System");
240MODULE_AUTHOR("Red Hat, Inc.");
241MODULE_LICENSE("GPL");
242
243module_init(init_gfs2_fs);
244module_exit(exit_gfs2_fs);
245
246
