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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
34struct workqueue_struct *gfs2_control_wq;
35
36static void gfs2_init_inode_once(void *foo)
37{
38 struct gfs2_inode *ip = foo;
39
40 inode_init_once(&ip->i_inode);
41 init_rwsem(&ip->i_rw_mutex);
42 INIT_LIST_HEAD(&ip->i_trunc_list);
43 ip->i_res = NULL;
44 ip->i_hash_cache = NULL;
45}
46
47static void gfs2_init_glock_once(void *foo)
48{
49 struct gfs2_glock *gl = foo;
50
51 INIT_HLIST_BL_NODE(&gl->gl_list);
52 spin_lock_init(&gl->gl_spin);
53 INIT_LIST_HEAD(&gl->gl_holders);
54 INIT_LIST_HEAD(&gl->gl_lru);
55 INIT_LIST_HEAD(&gl->gl_ail_list);
56 atomic_set(&gl->gl_ail_count, 0);
57 atomic_set(&gl->gl_revokes, 0);
58}
59
60static void gfs2_init_gl_aspace_once(void *foo)
61{
62 struct gfs2_glock *gl = foo;
63 struct address_space *mapping = (struct address_space *)(gl + 1);
64
65 gfs2_init_glock_once(gl);
66 address_space_init_once(mapping);
67}
68
69
70
71
72
73
74
75static int __init init_gfs2_fs(void)
76{
77 int error;
78
79 gfs2_str2qstr(&gfs2_qdot, ".");
80 gfs2_str2qstr(&gfs2_qdotdot, "..");
81 gfs2_quota_hash_init();
82
83 error = gfs2_sys_init();
84 if (error)
85 return error;
86
87 error = list_lru_init(&gfs2_qd_lru);
88 if (error)
89 goto fail_lru;
90
91 error = gfs2_glock_init();
92 if (error)
93 goto fail;
94
95 error = -ENOMEM;
96 gfs2_glock_cachep = kmem_cache_create("gfs2_glock",
97 sizeof(struct gfs2_glock),
98 0, 0,
99 gfs2_init_glock_once);
100 if (!gfs2_glock_cachep)
101 goto fail;
102
103 gfs2_glock_aspace_cachep = kmem_cache_create("gfs2_glock(aspace)",
104 sizeof(struct gfs2_glock) +
105 sizeof(struct address_space),
106 0, 0, gfs2_init_gl_aspace_once);
107
108 if (!gfs2_glock_aspace_cachep)
109 goto fail;
110
111 gfs2_inode_cachep = kmem_cache_create("gfs2_inode",
112 sizeof(struct gfs2_inode),
113 0, SLAB_RECLAIM_ACCOUNT|
114 SLAB_MEM_SPREAD,
115 gfs2_init_inode_once);
116 if (!gfs2_inode_cachep)
117 goto fail;
118
119 gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata",
120 sizeof(struct gfs2_bufdata),
121 0, 0, NULL);
122 if (!gfs2_bufdata_cachep)
123 goto fail;
124
125 gfs2_rgrpd_cachep = kmem_cache_create("gfs2_rgrpd",
126 sizeof(struct gfs2_rgrpd),
127 0, 0, NULL);
128 if (!gfs2_rgrpd_cachep)
129 goto fail;
130
131 gfs2_quotad_cachep = kmem_cache_create("gfs2_quotad",
132 sizeof(struct gfs2_quota_data),
133 0, 0, NULL);
134 if (!gfs2_quotad_cachep)
135 goto fail;
136
137 gfs2_rsrv_cachep = kmem_cache_create("gfs2_mblk",
138 sizeof(struct gfs2_blkreserv),
139 0, 0, NULL);
140 if (!gfs2_rsrv_cachep)
141 goto fail;
142
143 register_shrinker(&gfs2_qd_shrinker);
144
145 error = register_filesystem(&gfs2_fs_type);
146 if (error)
147 goto fail;
148
149 error = register_filesystem(&gfs2meta_fs_type);
150 if (error)
151 goto fail_unregister;
152
153 error = -ENOMEM;
154 gfs_recovery_wq = alloc_workqueue("gfs_recovery",
155 WQ_MEM_RECLAIM | WQ_FREEZABLE, 0);
156 if (!gfs_recovery_wq)
157 goto fail_wq;
158
159 gfs2_control_wq = alloc_workqueue("gfs2_control",
160 WQ_UNBOUND | WQ_FREEZABLE, 0);
161 if (!gfs2_control_wq)
162 goto fail_recovery;
163
164 gfs2_page_pool = mempool_create_page_pool(64, 0);
165 if (!gfs2_page_pool)
166 goto fail_control;
167
168 gfs2_register_debugfs();
169
170 pr_info("GFS2 installed\n");
171
172 return 0;
173
174fail_control:
175 destroy_workqueue(gfs2_control_wq);
176fail_recovery:
177 destroy_workqueue(gfs_recovery_wq);
178fail_wq:
179 unregister_filesystem(&gfs2meta_fs_type);
180fail_unregister:
181 unregister_filesystem(&gfs2_fs_type);
182fail:
183 list_lru_destroy(&gfs2_qd_lru);
184fail_lru:
185 unregister_shrinker(&gfs2_qd_shrinker);
186 gfs2_glock_exit();
187
188 if (gfs2_rsrv_cachep)
189 kmem_cache_destroy(gfs2_rsrv_cachep);
190
191 if (gfs2_quotad_cachep)
192 kmem_cache_destroy(gfs2_quotad_cachep);
193
194 if (gfs2_rgrpd_cachep)
195 kmem_cache_destroy(gfs2_rgrpd_cachep);
196
197 if (gfs2_bufdata_cachep)
198 kmem_cache_destroy(gfs2_bufdata_cachep);
199
200 if (gfs2_inode_cachep)
201 kmem_cache_destroy(gfs2_inode_cachep);
202
203 if (gfs2_glock_aspace_cachep)
204 kmem_cache_destroy(gfs2_glock_aspace_cachep);
205
206 if (gfs2_glock_cachep)
207 kmem_cache_destroy(gfs2_glock_cachep);
208
209 gfs2_sys_uninit();
210 return error;
211}
212
213
214
215
216
217
218static void __exit exit_gfs2_fs(void)
219{
220 unregister_shrinker(&gfs2_qd_shrinker);
221 gfs2_glock_exit();
222 gfs2_unregister_debugfs();
223 unregister_filesystem(&gfs2_fs_type);
224 unregister_filesystem(&gfs2meta_fs_type);
225 destroy_workqueue(gfs_recovery_wq);
226 destroy_workqueue(gfs2_control_wq);
227 list_lru_destroy(&gfs2_qd_lru);
228
229 rcu_barrier();
230
231 mempool_destroy(gfs2_page_pool);
232 kmem_cache_destroy(gfs2_rsrv_cachep);
233 kmem_cache_destroy(gfs2_quotad_cachep);
234 kmem_cache_destroy(gfs2_rgrpd_cachep);
235 kmem_cache_destroy(gfs2_bufdata_cachep);
236 kmem_cache_destroy(gfs2_inode_cachep);
237 kmem_cache_destroy(gfs2_glock_aspace_cachep);
238 kmem_cache_destroy(gfs2_glock_cachep);
239
240 gfs2_sys_uninit();
241}
242
243MODULE_DESCRIPTION("Global File System");
244MODULE_AUTHOR("Red Hat, Inc.");
245MODULE_LICENSE("GPL");
246
247module_init(init_gfs2_fs);
248module_exit(exit_gfs2_fs);
249
250
