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9
10#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
11
12#include <linux/slab.h>
13#include <linux/spinlock.h>
14#include <linux/completion.h>
15#include <linux/buffer_head.h>
16#include <linux/module.h>
17#include <linux/init.h>
18#include <linux/gfs2_ondisk.h>
19#include <linux/rcupdate.h>
20#include <linux/rculist_bl.h>
21#include <linux/atomic.h>
22#include <linux/mempool.h>
23
24#include "gfs2.h"
25#include "incore.h"
26#include "super.h"
27#include "sys.h"
28#include "util.h"
29#include "glock.h"
30#include "quota.h"
31#include "recovery.h"
32#include "dir.h"
33#include "glops.h"
34
35struct workqueue_struct *gfs2_control_wq;
36
37static void gfs2_init_inode_once(void *foo)
38{
39 struct gfs2_inode *ip = foo;
40
41 inode_init_once(&ip->i_inode);
42 init_rwsem(&ip->i_rw_mutex);
43 INIT_LIST_HEAD(&ip->i_trunc_list);
44 ip->i_qadata = NULL;
45 memset(&ip->i_res, 0, sizeof(ip->i_res));
46 RB_CLEAR_NODE(&ip->i_res.rs_node);
47 ip->i_hash_cache = NULL;
48 gfs2_holder_mark_uninitialized(&ip->i_iopen_gh);
49}
50
51static void gfs2_init_glock_once(void *foo)
52{
53 struct gfs2_glock *gl = foo;
54
55 spin_lock_init(&gl->gl_lockref.lock);
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 gfs2_quota_hash_init();
85
86 error = gfs2_sys_init();
87 if (error)
88 return error;
89
90 error = list_lru_init(&gfs2_qd_lru);
91 if (error)
92 goto fail_lru;
93
94 error = gfs2_glock_init();
95 if (error)
96 goto fail_glock;
97
98 error = -ENOMEM;
99 gfs2_glock_cachep = kmem_cache_create("gfs2_glock",
100 sizeof(struct gfs2_glock),
101 0, 0,
102 gfs2_init_glock_once);
103 if (!gfs2_glock_cachep)
104 goto fail_cachep1;
105
106 gfs2_glock_aspace_cachep = kmem_cache_create("gfs2_glock(aspace)",
107 sizeof(struct gfs2_glock) +
108 sizeof(struct address_space),
109 0, 0, gfs2_init_gl_aspace_once);
110
111 if (!gfs2_glock_aspace_cachep)
112 goto fail_cachep2;
113
114 gfs2_inode_cachep = kmem_cache_create("gfs2_inode",
115 sizeof(struct gfs2_inode),
116 0, SLAB_RECLAIM_ACCOUNT|
117 SLAB_MEM_SPREAD|
118 SLAB_ACCOUNT,
119 gfs2_init_inode_once);
120 if (!gfs2_inode_cachep)
121 goto fail_cachep3;
122
123 gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata",
124 sizeof(struct gfs2_bufdata),
125 0, 0, NULL);
126 if (!gfs2_bufdata_cachep)
127 goto fail_cachep4;
128
129 gfs2_rgrpd_cachep = kmem_cache_create("gfs2_rgrpd",
130 sizeof(struct gfs2_rgrpd),
131 0, 0, NULL);
132 if (!gfs2_rgrpd_cachep)
133 goto fail_cachep5;
134
135 gfs2_quotad_cachep = kmem_cache_create("gfs2_quotad",
136 sizeof(struct gfs2_quota_data),
137 0, 0, NULL);
138 if (!gfs2_quotad_cachep)
139 goto fail_cachep6;
140
141 gfs2_qadata_cachep = kmem_cache_create("gfs2_qadata",
142 sizeof(struct gfs2_qadata),
143 0, 0, NULL);
144 if (!gfs2_qadata_cachep)
145 goto fail_cachep7;
146
147 error = register_shrinker(&gfs2_qd_shrinker);
148 if (error)
149 goto fail_shrinker;
150
151 error = register_filesystem(&gfs2_fs_type);
152 if (error)
153 goto fail_fs1;
154
155 error = register_filesystem(&gfs2meta_fs_type);
156 if (error)
157 goto fail_fs2;
158
159 error = -ENOMEM;
160 gfs_recovery_wq = alloc_workqueue("gfs_recovery",
161 WQ_MEM_RECLAIM | WQ_FREEZABLE, 0);
162 if (!gfs_recovery_wq)
163 goto fail_wq1;
164
165 gfs2_control_wq = alloc_workqueue("gfs2_control",
166 WQ_UNBOUND | WQ_FREEZABLE, 0);
167 if (!gfs2_control_wq)
168 goto fail_wq2;
169
170 gfs2_freeze_wq = alloc_workqueue("freeze_workqueue", 0, 0);
171
172 if (!gfs2_freeze_wq)
173 goto fail_wq3;
174
175 gfs2_page_pool = mempool_create_page_pool(64, 0);
176 if (!gfs2_page_pool)
177 goto fail_mempool;
178
179 error = gfs2_register_debugfs();
180 if (error)
181 goto fail_debugfs;
182
183 pr_info("GFS2 installed\n");
184
185 return 0;
186
187fail_debugfs:
188 mempool_destroy(gfs2_page_pool);
189fail_mempool:
190 destroy_workqueue(gfs2_freeze_wq);
191fail_wq3:
192 destroy_workqueue(gfs2_control_wq);
193fail_wq2:
194 destroy_workqueue(gfs_recovery_wq);
195fail_wq1:
196 unregister_filesystem(&gfs2meta_fs_type);
197fail_fs2:
198 unregister_filesystem(&gfs2_fs_type);
199fail_fs1:
200 unregister_shrinker(&gfs2_qd_shrinker);
201fail_shrinker:
202 kmem_cache_destroy(gfs2_qadata_cachep);
203fail_cachep7:
204 kmem_cache_destroy(gfs2_quotad_cachep);
205fail_cachep6:
206 kmem_cache_destroy(gfs2_rgrpd_cachep);
207fail_cachep5:
208 kmem_cache_destroy(gfs2_bufdata_cachep);
209fail_cachep4:
210 kmem_cache_destroy(gfs2_inode_cachep);
211fail_cachep3:
212 kmem_cache_destroy(gfs2_glock_aspace_cachep);
213fail_cachep2:
214 kmem_cache_destroy(gfs2_glock_cachep);
215fail_cachep1:
216 gfs2_glock_exit();
217fail_glock:
218 list_lru_destroy(&gfs2_qd_lru);
219fail_lru:
220 gfs2_sys_uninit();
221 return error;
222}
223
224
225
226
227
228
229static void __exit exit_gfs2_fs(void)
230{
231 unregister_shrinker(&gfs2_qd_shrinker);
232 gfs2_glock_exit();
233 gfs2_unregister_debugfs();
234 unregister_filesystem(&gfs2_fs_type);
235 unregister_filesystem(&gfs2meta_fs_type);
236 destroy_workqueue(gfs_recovery_wq);
237 destroy_workqueue(gfs2_control_wq);
238 destroy_workqueue(gfs2_freeze_wq);
239 list_lru_destroy(&gfs2_qd_lru);
240
241 rcu_barrier();
242
243 mempool_destroy(gfs2_page_pool);
244 kmem_cache_destroy(gfs2_qadata_cachep);
245 kmem_cache_destroy(gfs2_quotad_cachep);
246 kmem_cache_destroy(gfs2_rgrpd_cachep);
247 kmem_cache_destroy(gfs2_bufdata_cachep);
248 kmem_cache_destroy(gfs2_inode_cachep);
249 kmem_cache_destroy(gfs2_glock_aspace_cachep);
250 kmem_cache_destroy(gfs2_glock_cachep);
251
252 gfs2_sys_uninit();
253}
254
255MODULE_DESCRIPTION("Global File System");
256MODULE_AUTHOR("Red Hat, Inc.");
257MODULE_LICENSE("GPL");
258
259module_init(init_gfs2_fs);
260module_exit(exit_gfs2_fs);
261
262
