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1 | /* |
2 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. |
3 | * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. |
4 | * |
5 | * This copyrighted material is made available to anyone wishing to use, |
6 | * modify, copy, or redistribute it subject to the terms and conditions |
7 | * of the GNU General Public License version 2. |
8 | */ |
9 | |
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 <asm/atomic.h> |
18 | #include <linux/slow-work.h> |
19 | |
20 | #include "gfs2.h" |
21 | #include "incore.h" |
22 | #include "super.h" |
23 | #include "sys.h" |
24 | #include "util.h" |
25 | #include "glock.h" |
26 | #include "quota.h" |
27 | |
28 | static struct shrinker qd_shrinker = { |
29 | .shrink = gfs2_shrink_qd_memory, |
30 | .seeks = DEFAULT_SEEKS, |
31 | }; |
32 | |
33 | static void gfs2_init_inode_once(void *foo) |
34 | { |
35 | struct gfs2_inode *ip = foo; |
36 | |
37 | inode_init_once(&ip->i_inode); |
38 | init_rwsem(&ip->i_rw_mutex); |
39 | INIT_LIST_HEAD(&ip->i_trunc_list); |
40 | ip->i_alloc = NULL; |
41 | } |
42 | |
43 | static void gfs2_init_glock_once(void *foo) |
44 | { |
45 | struct gfs2_glock *gl = foo; |
46 | |
47 | INIT_HLIST_NODE(&gl->gl_list); |
48 | spin_lock_init(&gl->gl_spin); |
49 | INIT_LIST_HEAD(&gl->gl_holders); |
50 | INIT_LIST_HEAD(&gl->gl_lru); |
51 | INIT_LIST_HEAD(&gl->gl_ail_list); |
52 | atomic_set(&gl->gl_ail_count, 0); |
53 | } |
54 | |
55 | static void gfs2_init_gl_aspace_once(void *foo) |
56 | { |
57 | struct gfs2_glock *gl = foo; |
58 | struct address_space *mapping = (struct address_space *)(gl + 1); |
59 | |
60 | gfs2_init_glock_once(gl); |
61 | memset(mapping, 0, sizeof(*mapping)); |
62 | INIT_RADIX_TREE(&mapping->page_tree, GFP_ATOMIC); |
63 | spin_lock_init(&mapping->tree_lock); |
64 | spin_lock_init(&mapping->i_mmap_lock); |
65 | INIT_LIST_HEAD(&mapping->private_list); |
66 | spin_lock_init(&mapping->private_lock); |
67 | INIT_RAW_PRIO_TREE_ROOT(&mapping->i_mmap); |
68 | INIT_LIST_HEAD(&mapping->i_mmap_nonlinear); |
69 | } |
70 | |
71 | /** |
72 | * init_gfs2_fs - Register GFS2 as a filesystem |
73 | * |
74 | * Returns: 0 on success, error code on failure |
75 | */ |
76 | |
77 | static int __init init_gfs2_fs(void) |
78 | { |
79 | int error; |
80 | |
81 | error = gfs2_sys_init(); |
82 | if (error) |
83 | return error; |
84 | |
85 | error = gfs2_glock_init(); |
86 | if (error) |
87 | goto fail; |
88 | |
89 | error = -ENOMEM; |
90 | gfs2_glock_cachep = kmem_cache_create("gfs2_glock", |
91 | sizeof(struct gfs2_glock), |
92 | 0, 0, |
93 | gfs2_init_glock_once); |
94 | if (!gfs2_glock_cachep) |
95 | goto fail; |
96 | |
97 | gfs2_glock_aspace_cachep = kmem_cache_create("gfs2_glock (aspace)", |
98 | sizeof(struct gfs2_glock) + |
99 | sizeof(struct address_space), |
100 | 0, 0, gfs2_init_gl_aspace_once); |
101 | |
102 | if (!gfs2_glock_aspace_cachep) |
103 | goto fail; |
104 | |
105 | gfs2_inode_cachep = kmem_cache_create("gfs2_inode", |
106 | sizeof(struct gfs2_inode), |
107 | 0, SLAB_RECLAIM_ACCOUNT| |
108 | SLAB_MEM_SPREAD, |
109 | gfs2_init_inode_once); |
110 | if (!gfs2_inode_cachep) |
111 | goto fail; |
112 | |
113 | gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata", |
114 | sizeof(struct gfs2_bufdata), |
115 | 0, 0, NULL); |
116 | if (!gfs2_bufdata_cachep) |
117 | goto fail; |
118 | |
119 | gfs2_rgrpd_cachep = kmem_cache_create("gfs2_rgrpd", |
120 | sizeof(struct gfs2_rgrpd), |
121 | 0, 0, NULL); |
122 | if (!gfs2_rgrpd_cachep) |
123 | goto fail; |
124 | |
125 | gfs2_quotad_cachep = kmem_cache_create("gfs2_quotad", |
126 | sizeof(struct gfs2_quota_data), |
127 | 0, 0, NULL); |
128 | if (!gfs2_quotad_cachep) |
129 | goto fail; |
130 | |
131 | register_shrinker(&qd_shrinker); |
132 | |
133 | error = register_filesystem(&gfs2_fs_type); |
134 | if (error) |
135 | goto fail; |
136 | |
137 | error = register_filesystem(&gfs2meta_fs_type); |
138 | if (error) |
139 | goto fail_unregister; |
140 | |
141 | error = slow_work_register_user(THIS_MODULE); |
142 | if (error) |
143 | goto fail_slow; |
144 | |
145 | gfs2_register_debugfs(); |
146 | |
147 | printk("GFS2 (built %s %s) installed\n", __DATE__, __TIME__); |
148 | |
149 | return 0; |
150 | |
151 | fail_slow: |
152 | unregister_filesystem(&gfs2meta_fs_type); |
153 | fail_unregister: |
154 | unregister_filesystem(&gfs2_fs_type); |
155 | fail: |
156 | unregister_shrinker(&qd_shrinker); |
157 | gfs2_glock_exit(); |
158 | |
159 | if (gfs2_quotad_cachep) |
160 | kmem_cache_destroy(gfs2_quotad_cachep); |
161 | |
162 | if (gfs2_rgrpd_cachep) |
163 | kmem_cache_destroy(gfs2_rgrpd_cachep); |
164 | |
165 | if (gfs2_bufdata_cachep) |
166 | kmem_cache_destroy(gfs2_bufdata_cachep); |
167 | |
168 | if (gfs2_inode_cachep) |
169 | kmem_cache_destroy(gfs2_inode_cachep); |
170 | |
171 | if (gfs2_glock_aspace_cachep) |
172 | kmem_cache_destroy(gfs2_glock_aspace_cachep); |
173 | |
174 | if (gfs2_glock_cachep) |
175 | kmem_cache_destroy(gfs2_glock_cachep); |
176 | |
177 | gfs2_sys_uninit(); |
178 | return error; |
179 | } |
180 | |
181 | /** |
182 | * exit_gfs2_fs - Unregister the file system |
183 | * |
184 | */ |
185 | |
186 | static void __exit exit_gfs2_fs(void) |
187 | { |
188 | unregister_shrinker(&qd_shrinker); |
189 | gfs2_glock_exit(); |
190 | gfs2_unregister_debugfs(); |
191 | unregister_filesystem(&gfs2_fs_type); |
192 | unregister_filesystem(&gfs2meta_fs_type); |
193 | slow_work_unregister_user(THIS_MODULE); |
194 | |
195 | kmem_cache_destroy(gfs2_quotad_cachep); |
196 | kmem_cache_destroy(gfs2_rgrpd_cachep); |
197 | kmem_cache_destroy(gfs2_bufdata_cachep); |
198 | kmem_cache_destroy(gfs2_inode_cachep); |
199 | kmem_cache_destroy(gfs2_glock_aspace_cachep); |
200 | kmem_cache_destroy(gfs2_glock_cachep); |
201 | |
202 | gfs2_sys_uninit(); |
203 | } |
204 | |
205 | MODULE_DESCRIPTION("Global File System"); |
206 | MODULE_AUTHOR("Red Hat, Inc."); |
207 | MODULE_LICENSE("GPL"); |
208 | |
209 | module_init(init_gfs2_fs); |
210 | module_exit(exit_gfs2_fs); |
211 | |
212 |
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v2.6.34-rc5
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