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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
73
74
75
76
77
78
79static int __init init_gfs2_fs(void)
80{
81 int error;
82
83 gfs2_str2qstr(&gfs2_qdot, ".");
84 gfs2_str2qstr(&gfs2_qdotdot, "..");
85
86 error = gfs2_sys_init();
87 if (error)
88 return error;
89
90 error = gfs2_glock_init();
91 if (error)
92 goto fail;
93
94 error = -ENOMEM;
95 gfs2_glock_cachep = kmem_cache_create("gfs2_glock",
96 sizeof(struct gfs2_glock),
97 0, 0,
98 gfs2_init_glock_once);
99 if (!gfs2_glock_cachep)
100 goto fail;
101
102 gfs2_glock_aspace_cachep = kmem_cache_create("gfs2_glock(aspace)",
103 sizeof(struct gfs2_glock) +
104 sizeof(struct address_space),
105 0, 0, gfs2_init_gl_aspace_once);
106
107 if (!gfs2_glock_aspace_cachep)
108 goto fail;
109
110 gfs2_inode_cachep = kmem_cache_create("gfs2_inode",
111 sizeof(struct gfs2_inode),
112 0, SLAB_RECLAIM_ACCOUNT|
113 SLAB_MEM_SPREAD,
114 gfs2_init_inode_once);
115 if (!gfs2_inode_cachep)
116 goto fail;
117
118 gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata",
119 sizeof(struct gfs2_bufdata),
120 0, 0, NULL);
121 if (!gfs2_bufdata_cachep)
122 goto fail;
123
124 gfs2_rgrpd_cachep = kmem_cache_create("gfs2_rgrpd",
125 sizeof(struct gfs2_rgrpd),
126 0, 0, NULL);
127 if (!gfs2_rgrpd_cachep)
128 goto fail;
129
130 gfs2_quotad_cachep = kmem_cache_create("gfs2_quotad",
131 sizeof(struct gfs2_quota_data),
132 0, 0, NULL);
133 if (!gfs2_quotad_cachep)
134 goto fail;
135
136 gfs2_rsrv_cachep = kmem_cache_create("gfs2_mblk",
137 sizeof(struct gfs2_blkreserv),
138 0, 0, NULL);
139 if (!gfs2_rsrv_cachep)
140 goto fail;
141
142 register_shrinker(&qd_shrinker);
143
144 error = register_filesystem(&gfs2_fs_type);
145 if (error)
146 goto fail;
147
148 error = register_filesystem(&gfs2meta_fs_type);
149 if (error)
150 goto fail_unregister;
151
152 error = -ENOMEM;
153 gfs_recovery_wq = alloc_workqueue("gfs_recovery",
154 WQ_MEM_RECLAIM | WQ_FREEZABLE, 0);
155 if (!gfs_recovery_wq)
156 goto fail_wq;
157
158 gfs2_control_wq = alloc_workqueue("gfs2_control",
159 WQ_NON_REENTRANT | WQ_UNBOUND | WQ_FREEZABLE, 0);
160 if (!gfs2_control_wq)
161 goto fail_recovery;
162
163 gfs2_page_pool = mempool_create_page_pool(64, 0);
164 if (!gfs2_page_pool)
165 goto fail_control;
166
167 gfs2_register_debugfs();
168
169 printk("GFS2 installed\n");
170
171 return 0;
172
173fail_control:
174 destroy_workqueue(gfs2_control_wq);
175fail_recovery:
176 destroy_workqueue(gfs_recovery_wq);
177fail_wq:
178 unregister_filesystem(&gfs2meta_fs_type);
179fail_unregister:
180 unregister_filesystem(&gfs2_fs_type);
181fail:
182 unregister_shrinker(&qd_shrinker);
183 gfs2_glock_exit();
184
185 if (gfs2_rsrv_cachep)
186 kmem_cache_destroy(gfs2_rsrv_cachep);
187
188 if (gfs2_quotad_cachep)
189 kmem_cache_destroy(gfs2_quotad_cachep);
190
191 if (gfs2_rgrpd_cachep)
192 kmem_cache_destroy(gfs2_rgrpd_cachep);
193
194 if (gfs2_bufdata_cachep)
195 kmem_cache_destroy(gfs2_bufdata_cachep);
196
197 if (gfs2_inode_cachep)
198 kmem_cache_destroy(gfs2_inode_cachep);
199
200 if (gfs2_glock_aspace_cachep)
201 kmem_cache_destroy(gfs2_glock_aspace_cachep);
202
203 if (gfs2_glock_cachep)
204 kmem_cache_destroy(gfs2_glock_cachep);
205
206 gfs2_sys_uninit();
207 return error;
208}
209
210
211
212
213
214
215static void __exit exit_gfs2_fs(void)
216{
217 unregister_shrinker(&qd_shrinker);
218 gfs2_glock_exit();
219 gfs2_unregister_debugfs();
220 unregister_filesystem(&gfs2_fs_type);
221 unregister_filesystem(&gfs2meta_fs_type);
222 destroy_workqueue(gfs_recovery_wq);
223 destroy_workqueue(gfs2_control_wq);
224
225 rcu_barrier();
226
227 mempool_destroy(gfs2_page_pool);
228 kmem_cache_destroy(gfs2_rsrv_cachep);
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
