2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3 * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
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.
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>
32 struct workqueue_struct *gfs2_control_wq;
34 static void gfs2_init_inode_once(void *foo)
36 struct gfs2_inode *ip = foo;
38 inode_init_once(&ip->i_inode);
39 init_rwsem(&ip->i_rw_mutex);
40 INIT_LIST_HEAD(&ip->i_trunc_list);
42 ip->i_hash_cache = NULL;
45 static void gfs2_init_glock_once(void *foo)
47 struct gfs2_glock *gl = foo;
49 INIT_HLIST_BL_NODE(&gl->gl_list);
50 spin_lock_init(&gl->gl_spin);
51 INIT_LIST_HEAD(&gl->gl_holders);
52 INIT_LIST_HEAD(&gl->gl_lru);
53 INIT_LIST_HEAD(&gl->gl_ail_list);
54 atomic_set(&gl->gl_ail_count, 0);
55 atomic_set(&gl->gl_revokes, 0);
58 static void gfs2_init_gl_aspace_once(void *foo)
60 struct gfs2_glock *gl = foo;
61 struct address_space *mapping = (struct address_space *)(gl + 1);
63 gfs2_init_glock_once(gl);
64 address_space_init_once(mapping);
68 * init_gfs2_fs - Register GFS2 as a filesystem
70 * Returns: 0 on success, error code on failure
73 static int __init init_gfs2_fs(void)
77 gfs2_str2qstr(&gfs2_qdot, ".");
78 gfs2_str2qstr(&gfs2_qdotdot, "..");
79 gfs2_quota_hash_init();
81 error = gfs2_sys_init();
85 error = list_lru_init(&gfs2_qd_lru);
89 error = gfs2_glock_init();
94 gfs2_glock_cachep = kmem_cache_create("gfs2_glock",
95 sizeof(struct gfs2_glock),
97 gfs2_init_glock_once);
98 if (!gfs2_glock_cachep)
101 gfs2_glock_aspace_cachep = kmem_cache_create("gfs2_glock(aspace)",
102 sizeof(struct gfs2_glock) +
103 sizeof(struct address_space),
104 0, 0, gfs2_init_gl_aspace_once);
106 if (!gfs2_glock_aspace_cachep)
109 gfs2_inode_cachep = kmem_cache_create("gfs2_inode",
110 sizeof(struct gfs2_inode),
111 0, SLAB_RECLAIM_ACCOUNT|
113 gfs2_init_inode_once);
114 if (!gfs2_inode_cachep)
117 gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata",
118 sizeof(struct gfs2_bufdata),
120 if (!gfs2_bufdata_cachep)
123 gfs2_rgrpd_cachep = kmem_cache_create("gfs2_rgrpd",
124 sizeof(struct gfs2_rgrpd),
126 if (!gfs2_rgrpd_cachep)
129 gfs2_quotad_cachep = kmem_cache_create("gfs2_quotad",
130 sizeof(struct gfs2_quota_data),
132 if (!gfs2_quotad_cachep)
135 gfs2_rsrv_cachep = kmem_cache_create("gfs2_mblk",
136 sizeof(struct gfs2_blkreserv),
138 if (!gfs2_rsrv_cachep)
141 register_shrinker(&gfs2_qd_shrinker);
143 error = register_filesystem(&gfs2_fs_type);
147 error = register_filesystem(&gfs2meta_fs_type);
149 goto fail_unregister;
152 gfs_recovery_wq = alloc_workqueue("gfs_recovery",
153 WQ_MEM_RECLAIM | WQ_FREEZABLE, 0);
154 if (!gfs_recovery_wq)
157 gfs2_control_wq = alloc_workqueue("gfs2_control",
158 WQ_UNBOUND | WQ_FREEZABLE, 0);
159 if (!gfs2_control_wq)
162 gfs2_page_pool = mempool_create_page_pool(64, 0);
166 gfs2_register_debugfs();
168 printk("GFS2 installed\n");
173 destroy_workqueue(gfs2_control_wq);
175 destroy_workqueue(gfs_recovery_wq);
177 unregister_filesystem(&gfs2meta_fs_type);
179 unregister_filesystem(&gfs2_fs_type);
181 list_lru_destroy(&gfs2_qd_lru);
183 unregister_shrinker(&gfs2_qd_shrinker);
186 if (gfs2_rsrv_cachep)
187 kmem_cache_destroy(gfs2_rsrv_cachep);
189 if (gfs2_quotad_cachep)
190 kmem_cache_destroy(gfs2_quotad_cachep);
192 if (gfs2_rgrpd_cachep)
193 kmem_cache_destroy(gfs2_rgrpd_cachep);
195 if (gfs2_bufdata_cachep)
196 kmem_cache_destroy(gfs2_bufdata_cachep);
198 if (gfs2_inode_cachep)
199 kmem_cache_destroy(gfs2_inode_cachep);
201 if (gfs2_glock_aspace_cachep)
202 kmem_cache_destroy(gfs2_glock_aspace_cachep);
204 if (gfs2_glock_cachep)
205 kmem_cache_destroy(gfs2_glock_cachep);
212 * exit_gfs2_fs - Unregister the file system
216 static void __exit exit_gfs2_fs(void)
218 unregister_shrinker(&gfs2_qd_shrinker);
220 gfs2_unregister_debugfs();
221 unregister_filesystem(&gfs2_fs_type);
222 unregister_filesystem(&gfs2meta_fs_type);
223 destroy_workqueue(gfs_recovery_wq);
224 destroy_workqueue(gfs2_control_wq);
225 list_lru_destroy(&gfs2_qd_lru);
229 mempool_destroy(gfs2_page_pool);
230 kmem_cache_destroy(gfs2_rsrv_cachep);
231 kmem_cache_destroy(gfs2_quotad_cachep);
232 kmem_cache_destroy(gfs2_rgrpd_cachep);
233 kmem_cache_destroy(gfs2_bufdata_cachep);
234 kmem_cache_destroy(gfs2_inode_cachep);
235 kmem_cache_destroy(gfs2_glock_aspace_cachep);
236 kmem_cache_destroy(gfs2_glock_cachep);
241 MODULE_DESCRIPTION("Global File System");
242 MODULE_AUTHOR("Red Hat, Inc.");
243 MODULE_LICENSE("GPL");
245 module_init(init_gfs2_fs);
246 module_exit(exit_gfs2_fs);