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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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>
34 struct workqueue_struct *gfs2_control_wq;
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);
44 ip->i_hash_cache = NULL;
47 static void gfs2_init_glock_once(void *foo)
49 struct gfs2_glock *gl = foo;
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);
60 static void gfs2_init_gl_aspace_once(void *foo)
62 struct gfs2_glock *gl = foo;
63 struct address_space *mapping = (struct address_space *)(gl + 1);
65 gfs2_init_glock_once(gl);
66 address_space_init_once(mapping);
70 * init_gfs2_fs - Register GFS2 as a filesystem
72 * Returns: 0 on success, error code on failure
75 static int __init init_gfs2_fs(void)
79 gfs2_str2qstr(&gfs2_qdot, ".");
80 gfs2_str2qstr(&gfs2_qdotdot, "..");
81 gfs2_quota_hash_init();
83 error = gfs2_sys_init();
87 error = list_lru_init(&gfs2_qd_lru);
91 error = gfs2_glock_init();
96 gfs2_glock_cachep = kmem_cache_create("gfs2_glock",
97 sizeof(struct gfs2_glock),
99 gfs2_init_glock_once);
100 if (!gfs2_glock_cachep)
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);
108 if (!gfs2_glock_aspace_cachep)
111 gfs2_inode_cachep = kmem_cache_create("gfs2_inode",
112 sizeof(struct gfs2_inode),
113 0, SLAB_RECLAIM_ACCOUNT|
115 gfs2_init_inode_once);
116 if (!gfs2_inode_cachep)
119 gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata",
120 sizeof(struct gfs2_bufdata),
122 if (!gfs2_bufdata_cachep)
125 gfs2_rgrpd_cachep = kmem_cache_create("gfs2_rgrpd",
126 sizeof(struct gfs2_rgrpd),
128 if (!gfs2_rgrpd_cachep)
131 gfs2_quotad_cachep = kmem_cache_create("gfs2_quotad",
132 sizeof(struct gfs2_quota_data),
134 if (!gfs2_quotad_cachep)
137 gfs2_rsrv_cachep = kmem_cache_create("gfs2_mblk",
138 sizeof(struct gfs2_blkreserv),
140 if (!gfs2_rsrv_cachep)
143 register_shrinker(&gfs2_qd_shrinker);
145 error = register_filesystem(&gfs2_fs_type);
149 error = register_filesystem(&gfs2meta_fs_type);
151 goto fail_unregister;
154 gfs_recovery_wq = alloc_workqueue("gfs_recovery",
155 WQ_MEM_RECLAIM | WQ_FREEZABLE, 0);
156 if (!gfs_recovery_wq)
159 gfs2_control_wq = alloc_workqueue("gfs2_control",
160 WQ_UNBOUND | WQ_FREEZABLE, 0);
161 if (!gfs2_control_wq)
164 gfs2_page_pool = mempool_create_page_pool(64, 0);
168 gfs2_register_debugfs();
170 pr_info("GFS2 installed\n");
175 destroy_workqueue(gfs2_control_wq);
177 destroy_workqueue(gfs_recovery_wq);
179 unregister_filesystem(&gfs2meta_fs_type);
181 unregister_filesystem(&gfs2_fs_type);
183 list_lru_destroy(&gfs2_qd_lru);
185 unregister_shrinker(&gfs2_qd_shrinker);
188 if (gfs2_rsrv_cachep)
189 kmem_cache_destroy(gfs2_rsrv_cachep);
191 if (gfs2_quotad_cachep)
192 kmem_cache_destroy(gfs2_quotad_cachep);
194 if (gfs2_rgrpd_cachep)
195 kmem_cache_destroy(gfs2_rgrpd_cachep);
197 if (gfs2_bufdata_cachep)
198 kmem_cache_destroy(gfs2_bufdata_cachep);
200 if (gfs2_inode_cachep)
201 kmem_cache_destroy(gfs2_inode_cachep);
203 if (gfs2_glock_aspace_cachep)
204 kmem_cache_destroy(gfs2_glock_aspace_cachep);
206 if (gfs2_glock_cachep)
207 kmem_cache_destroy(gfs2_glock_cachep);
214 * exit_gfs2_fs - Unregister the file system
218 static void __exit exit_gfs2_fs(void)
220 unregister_shrinker(&gfs2_qd_shrinker);
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);
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);
243 MODULE_DESCRIPTION("Global File System");
244 MODULE_AUTHOR("Red Hat, Inc.");
245 MODULE_LICENSE("GPL");
247 module_init(init_gfs2_fs);
248 module_exit(exit_gfs2_fs);