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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 INIT_HLIST_BL_NODE(&gl->gl_list);
56 spin_lock_init(&gl->gl_lockref.lock);
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 gfs2_quota_hash_init();
86
87 error = gfs2_sys_init();
88 if (error)
89 return error;
90
91 error = list_lru_init(&gfs2_qd_lru);
92 if (error)
93 goto fail_lru;
94
95 error = gfs2_glock_init();
96 if (error)
97 goto fail;
98
99 error = -ENOMEM;
100 gfs2_glock_cachep = kmem_cache_create("gfs2_glock",
101 sizeof(struct gfs2_glock),
102 0, 0,
103 gfs2_init_glock_once);
104 if (!gfs2_glock_cachep)
105 goto fail;
106
107 gfs2_glock_aspace_cachep = kmem_cache_create("gfs2_glock(aspace)",
108 sizeof(struct gfs2_glock) +
109 sizeof(struct address_space),
110 0, 0, gfs2_init_gl_aspace_once);
111
112 if (!gfs2_glock_aspace_cachep)
113 goto fail;
114
115 gfs2_inode_cachep = kmem_cache_create("gfs2_inode",
116 sizeof(struct gfs2_inode),
117 0, SLAB_RECLAIM_ACCOUNT|
118 SLAB_MEM_SPREAD|
119 SLAB_ACCOUNT,
120 gfs2_init_inode_once);
121 if (!gfs2_inode_cachep)
122 goto fail;
123
124 gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata",
125 sizeof(struct gfs2_bufdata),
126 0, 0, NULL);
127 if (!gfs2_bufdata_cachep)
128 goto fail;
129
130 gfs2_rgrpd_cachep = kmem_cache_create("gfs2_rgrpd",
131 sizeof(struct gfs2_rgrpd),
132 0, 0, NULL);
133 if (!gfs2_rgrpd_cachep)
134 goto fail;
135
136 gfs2_quotad_cachep = kmem_cache_create("gfs2_quotad",
137 sizeof(struct gfs2_quota_data),
138 0, 0, NULL);
139 if (!gfs2_quotad_cachep)
140 goto fail;
141
142 gfs2_qadata_cachep = kmem_cache_create("gfs2_qadata",
143 sizeof(struct gfs2_qadata),
144 0, 0, NULL);
145 if (!gfs2_qadata_cachep)
146 goto fail;
147
148 error = register_shrinker(&gfs2_qd_shrinker);
149 if (error)
150 goto fail;
151
152 error = register_filesystem(&gfs2_fs_type);
153 if (error)
154 goto fail;
155
156 error = register_filesystem(&gfs2meta_fs_type);
157 if (error)
158 goto fail_unregister;
159
160 error = -ENOMEM;
161 gfs_recovery_wq = alloc_workqueue("gfs_recovery",
162 WQ_MEM_RECLAIM | WQ_FREEZABLE, 0);
163 if (!gfs_recovery_wq)
164 goto fail_wq;
165
166 gfs2_control_wq = alloc_workqueue("gfs2_control",
167 WQ_UNBOUND | WQ_FREEZABLE, 0);
168 if (!gfs2_control_wq)
169 goto fail_recovery;
170
171 gfs2_freeze_wq = alloc_workqueue("freeze_workqueue", 0, 0);
172
173 if (!gfs2_freeze_wq)
174 goto fail_control;
175
176 gfs2_page_pool = mempool_create_page_pool(64, 0);
177 if (!gfs2_page_pool)
178 goto fail_freeze;
179
180 gfs2_register_debugfs();
181
182 pr_info("GFS2 installed\n");
183
184 return 0;
185
186fail_freeze:
187 destroy_workqueue(gfs2_freeze_wq);
188fail_control:
189 destroy_workqueue(gfs2_control_wq);
190fail_recovery:
191 destroy_workqueue(gfs_recovery_wq);
192fail_wq:
193 unregister_filesystem(&gfs2meta_fs_type);
194fail_unregister:
195 unregister_filesystem(&gfs2_fs_type);
196fail:
197 list_lru_destroy(&gfs2_qd_lru);
198fail_lru:
199 unregister_shrinker(&gfs2_qd_shrinker);
200 gfs2_glock_exit();
201
202 if (gfs2_qadata_cachep)
203 kmem_cache_destroy(gfs2_qadata_cachep);
204
205 if (gfs2_quotad_cachep)
206 kmem_cache_destroy(gfs2_quotad_cachep);
207
208 if (gfs2_rgrpd_cachep)
209 kmem_cache_destroy(gfs2_rgrpd_cachep);
210
211 if (gfs2_bufdata_cachep)
212 kmem_cache_destroy(gfs2_bufdata_cachep);
213
214 if (gfs2_inode_cachep)
215 kmem_cache_destroy(gfs2_inode_cachep);
216
217 if (gfs2_glock_aspace_cachep)
218 kmem_cache_destroy(gfs2_glock_aspace_cachep);
219
220 if (gfs2_glock_cachep)
221 kmem_cache_destroy(gfs2_glock_cachep);
222
223 gfs2_sys_uninit();
224 return error;
225}
226
227
228
229
230
231
232static void __exit exit_gfs2_fs(void)
233{
234 unregister_shrinker(&gfs2_qd_shrinker);
235 gfs2_glock_exit();
236 gfs2_unregister_debugfs();
237 unregister_filesystem(&gfs2_fs_type);
238 unregister_filesystem(&gfs2meta_fs_type);
239 destroy_workqueue(gfs_recovery_wq);
240 destroy_workqueue(gfs2_control_wq);
241 destroy_workqueue(gfs2_freeze_wq);
242 list_lru_destroy(&gfs2_qd_lru);
243
244 rcu_barrier();
245
246 mempool_destroy(gfs2_page_pool);
247 kmem_cache_destroy(gfs2_qadata_cachep);
248 kmem_cache_destroy(gfs2_quotad_cachep);
249 kmem_cache_destroy(gfs2_rgrpd_cachep);
250 kmem_cache_destroy(gfs2_bufdata_cachep);
251 kmem_cache_destroy(gfs2_inode_cachep);
252 kmem_cache_destroy(gfs2_glock_aspace_cachep);
253 kmem_cache_destroy(gfs2_glock_cachep);
254
255 gfs2_sys_uninit();
256}
257
258MODULE_DESCRIPTION("Global File System");
259MODULE_AUTHOR("Red Hat, Inc.");
260MODULE_LICENSE("GPL");
261
262module_init(init_gfs2_fs);
263module_exit(exit_gfs2_fs);
264
265
