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>
31 struct workqueue_struct *gfs2_control_wq;
33 static struct shrinker qd_shrinker = {
34 .shrink = gfs2_shrink_qd_memory,
35 .seeks = DEFAULT_SEEKS,
38 static void gfs2_init_inode_once(void *foo)
40 struct gfs2_inode *ip = foo;
42 inode_init_once(&ip->i_inode);
43 init_rwsem(&ip->i_rw_mutex);
44 INIT_LIST_HEAD(&ip->i_trunc_list);
47 ip->i_hash_cache = NULL;
50 static void gfs2_init_glock_once(void *foo)
52 struct gfs2_glock *gl = foo;
54 INIT_HLIST_BL_NODE(&gl->gl_list);
55 spin_lock_init(&gl->gl_spin);
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);
63 static void gfs2_init_gl_aspace_once(void *foo)
65 struct gfs2_glock *gl = foo;
66 struct address_space *mapping = (struct address_space *)(gl + 1);
68 gfs2_init_glock_once(gl);
69 address_space_init_once(mapping);
73 * init_gfs2_fs - Register GFS2 as a filesystem
75 * Returns: 0 on success, error code on failure
78 static int __init init_gfs2_fs(void)
82 gfs2_str2qstr(&gfs2_qdot, ".");
83 gfs2_str2qstr(&gfs2_qdotdot, "..");
85 error = gfs2_sys_init();
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 register_shrinker(&qd_shrinker);
137 error = register_filesystem(&gfs2_fs_type);
141 error = register_filesystem(&gfs2meta_fs_type);
143 goto fail_unregister;
146 gfs_recovery_wq = alloc_workqueue("gfs_recovery",
147 WQ_MEM_RECLAIM | WQ_FREEZABLE, 0);
148 if (!gfs_recovery_wq)
151 gfs2_control_wq = alloc_workqueue("gfs2_control",
152 WQ_NON_REENTRANT | WQ_UNBOUND | WQ_FREEZABLE, 0);
153 if (!gfs2_control_wq)
156 gfs2_register_debugfs();
158 printk("GFS2 installed\n");
163 destroy_workqueue(gfs_recovery_wq);
165 unregister_filesystem(&gfs2meta_fs_type);
167 unregister_filesystem(&gfs2_fs_type);
169 unregister_shrinker(&qd_shrinker);
172 if (gfs2_quotad_cachep)
173 kmem_cache_destroy(gfs2_quotad_cachep);
175 if (gfs2_rgrpd_cachep)
176 kmem_cache_destroy(gfs2_rgrpd_cachep);
178 if (gfs2_bufdata_cachep)
179 kmem_cache_destroy(gfs2_bufdata_cachep);
181 if (gfs2_inode_cachep)
182 kmem_cache_destroy(gfs2_inode_cachep);
184 if (gfs2_glock_aspace_cachep)
185 kmem_cache_destroy(gfs2_glock_aspace_cachep);
187 if (gfs2_glock_cachep)
188 kmem_cache_destroy(gfs2_glock_cachep);
195 * exit_gfs2_fs - Unregister the file system
199 static void __exit exit_gfs2_fs(void)
201 unregister_shrinker(&qd_shrinker);
203 gfs2_unregister_debugfs();
204 unregister_filesystem(&gfs2_fs_type);
205 unregister_filesystem(&gfs2meta_fs_type);
206 destroy_workqueue(gfs_recovery_wq);
207 destroy_workqueue(gfs2_control_wq);
211 kmem_cache_destroy(gfs2_quotad_cachep);
212 kmem_cache_destroy(gfs2_rgrpd_cachep);
213 kmem_cache_destroy(gfs2_bufdata_cachep);
214 kmem_cache_destroy(gfs2_inode_cachep);
215 kmem_cache_destroy(gfs2_glock_aspace_cachep);
216 kmem_cache_destroy(gfs2_glock_cachep);
221 MODULE_DESCRIPTION("Global File System");
222 MODULE_AUTHOR("Red Hat, Inc.");
223 MODULE_LICENSE("GPL");
225 module_init(init_gfs2_fs);
226 module_exit(exit_gfs2_fs);