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 static struct shrinker qd_shrinker = {
32 .shrink = gfs2_shrink_qd_memory,
33 .seeks = DEFAULT_SEEKS,
36 static void gfs2_init_inode_once(void *foo)
38 struct gfs2_inode *ip = foo;
40 inode_init_once(&ip->i_inode);
41 init_rwsem(&ip->i_rw_mutex);
42 INIT_LIST_HEAD(&ip->i_trunc_list);
45 ip->i_hash_cache = NULL;
48 static void gfs2_init_glock_once(void *foo)
50 struct gfs2_glock *gl = foo;
52 INIT_HLIST_BL_NODE(&gl->gl_list);
53 spin_lock_init(&gl->gl_spin);
54 INIT_LIST_HEAD(&gl->gl_holders);
55 INIT_LIST_HEAD(&gl->gl_lru);
56 INIT_LIST_HEAD(&gl->gl_ail_list);
57 atomic_set(&gl->gl_ail_count, 0);
58 atomic_set(&gl->gl_revokes, 0);
61 static void gfs2_init_gl_aspace_once(void *foo)
63 struct gfs2_glock *gl = foo;
64 struct address_space *mapping = (struct address_space *)(gl + 1);
66 gfs2_init_glock_once(gl);
67 address_space_init_once(mapping);
71 * init_gfs2_fs - Register GFS2 as a filesystem
73 * Returns: 0 on success, error code on failure
76 static int __init init_gfs2_fs(void)
80 gfs2_str2qstr(&gfs2_qdot, ".");
81 gfs2_str2qstr(&gfs2_qdotdot, "..");
83 error = gfs2_sys_init();
87 error = gfs2_glock_init();
92 gfs2_glock_cachep = kmem_cache_create("gfs2_glock",
93 sizeof(struct gfs2_glock),
95 gfs2_init_glock_once);
96 if (!gfs2_glock_cachep)
99 gfs2_glock_aspace_cachep = kmem_cache_create("gfs2_glock(aspace)",
100 sizeof(struct gfs2_glock) +
101 sizeof(struct address_space),
102 0, 0, gfs2_init_gl_aspace_once);
104 if (!gfs2_glock_aspace_cachep)
107 gfs2_inode_cachep = kmem_cache_create("gfs2_inode",
108 sizeof(struct gfs2_inode),
109 0, SLAB_RECLAIM_ACCOUNT|
111 gfs2_init_inode_once);
112 if (!gfs2_inode_cachep)
115 gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata",
116 sizeof(struct gfs2_bufdata),
118 if (!gfs2_bufdata_cachep)
121 gfs2_rgrpd_cachep = kmem_cache_create("gfs2_rgrpd",
122 sizeof(struct gfs2_rgrpd),
124 if (!gfs2_rgrpd_cachep)
127 gfs2_quotad_cachep = kmem_cache_create("gfs2_quotad",
128 sizeof(struct gfs2_quota_data),
130 if (!gfs2_quotad_cachep)
133 register_shrinker(&qd_shrinker);
135 error = register_filesystem(&gfs2_fs_type);
139 error = register_filesystem(&gfs2meta_fs_type);
141 goto fail_unregister;
144 gfs_recovery_wq = alloc_workqueue("gfs_recovery",
145 WQ_MEM_RECLAIM | WQ_FREEZABLE, 0);
146 if (!gfs_recovery_wq)
149 gfs2_register_debugfs();
151 printk("GFS2 installed\n");
156 unregister_filesystem(&gfs2meta_fs_type);
158 unregister_filesystem(&gfs2_fs_type);
160 unregister_shrinker(&qd_shrinker);
163 if (gfs2_quotad_cachep)
164 kmem_cache_destroy(gfs2_quotad_cachep);
166 if (gfs2_rgrpd_cachep)
167 kmem_cache_destroy(gfs2_rgrpd_cachep);
169 if (gfs2_bufdata_cachep)
170 kmem_cache_destroy(gfs2_bufdata_cachep);
172 if (gfs2_inode_cachep)
173 kmem_cache_destroy(gfs2_inode_cachep);
175 if (gfs2_glock_aspace_cachep)
176 kmem_cache_destroy(gfs2_glock_aspace_cachep);
178 if (gfs2_glock_cachep)
179 kmem_cache_destroy(gfs2_glock_cachep);
186 * exit_gfs2_fs - Unregister the file system
190 static void __exit exit_gfs2_fs(void)
192 unregister_shrinker(&qd_shrinker);
194 gfs2_unregister_debugfs();
195 unregister_filesystem(&gfs2_fs_type);
196 unregister_filesystem(&gfs2meta_fs_type);
197 destroy_workqueue(gfs_recovery_wq);
201 kmem_cache_destroy(gfs2_quotad_cachep);
202 kmem_cache_destroy(gfs2_rgrpd_cachep);
203 kmem_cache_destroy(gfs2_bufdata_cachep);
204 kmem_cache_destroy(gfs2_inode_cachep);
205 kmem_cache_destroy(gfs2_glock_aspace_cachep);
206 kmem_cache_destroy(gfs2_glock_cachep);
211 MODULE_DESCRIPTION("Global File System");
212 MODULE_AUTHOR("Red Hat, Inc.");
213 MODULE_LICENSE("GPL");
215 module_init(init_gfs2_fs);
216 module_exit(exit_gfs2_fs);