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>
35 struct workqueue_struct *gfs2_control_wq;
37 static void gfs2_init_inode_once(void *foo)
39 struct gfs2_inode *ip = foo;
41 inode_init_once(&ip->i_inode);
42 init_rwsem(&ip->i_rw_mutex);
43 INIT_LIST_HEAD(&ip->i_trunc_list);
45 memset(&ip->i_res, 0, sizeof(ip->i_res));
46 RB_CLEAR_NODE(&ip->i_res.rs_node);
47 ip->i_hash_cache = NULL;
48 gfs2_holder_mark_uninitialized(&ip->i_iopen_gh);
51 static void gfs2_init_glock_once(void *foo)
53 struct gfs2_glock *gl = foo;
55 INIT_HLIST_BL_NODE(&gl->gl_list);
56 spin_lock_init(&gl->gl_lockref.lock);
57 INIT_LIST_HEAD(&gl->gl_holders);
58 INIT_LIST_HEAD(&gl->gl_lru);
59 INIT_LIST_HEAD(&gl->gl_ail_list);
60 atomic_set(&gl->gl_ail_count, 0);
61 atomic_set(&gl->gl_revokes, 0);
64 static void gfs2_init_gl_aspace_once(void *foo)
66 struct gfs2_glock *gl = foo;
67 struct address_space *mapping = (struct address_space *)(gl + 1);
69 gfs2_init_glock_once(gl);
70 address_space_init_once(mapping);
74 * init_gfs2_fs - Register GFS2 as a filesystem
76 * Returns: 0 on success, error code on failure
79 static int __init init_gfs2_fs(void)
83 gfs2_str2qstr(&gfs2_qdot, ".");
84 gfs2_str2qstr(&gfs2_qdotdot, "..");
85 gfs2_quota_hash_init();
87 error = gfs2_sys_init();
91 error = list_lru_init(&gfs2_qd_lru);
95 error = gfs2_glock_init();
100 gfs2_glock_cachep = kmem_cache_create("gfs2_glock",
101 sizeof(struct gfs2_glock),
103 gfs2_init_glock_once);
104 if (!gfs2_glock_cachep)
107 gfs2_glock_aspace_cachep = kmem_cache_create("gfs2_glock(aspace)",
108 sizeof(struct gfs2_glock) +
109 sizeof(struct address_space),
110 0, 0, gfs2_init_gl_aspace_once);
112 if (!gfs2_glock_aspace_cachep)
115 gfs2_inode_cachep = kmem_cache_create("gfs2_inode",
116 sizeof(struct gfs2_inode),
117 0, SLAB_RECLAIM_ACCOUNT|
120 gfs2_init_inode_once);
121 if (!gfs2_inode_cachep)
124 gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata",
125 sizeof(struct gfs2_bufdata),
127 if (!gfs2_bufdata_cachep)
130 gfs2_rgrpd_cachep = kmem_cache_create("gfs2_rgrpd",
131 sizeof(struct gfs2_rgrpd),
133 if (!gfs2_rgrpd_cachep)
136 gfs2_quotad_cachep = kmem_cache_create("gfs2_quotad",
137 sizeof(struct gfs2_quota_data),
139 if (!gfs2_quotad_cachep)
142 gfs2_qadata_cachep = kmem_cache_create("gfs2_qadata",
143 sizeof(struct gfs2_qadata),
145 if (!gfs2_qadata_cachep)
148 error = register_shrinker(&gfs2_qd_shrinker);
152 error = register_filesystem(&gfs2_fs_type);
156 error = register_filesystem(&gfs2meta_fs_type);
158 goto fail_unregister;
161 gfs_recovery_wq = alloc_workqueue("gfs_recovery",
162 WQ_MEM_RECLAIM | WQ_FREEZABLE, 0);
163 if (!gfs_recovery_wq)
166 gfs2_control_wq = alloc_workqueue("gfs2_control",
167 WQ_UNBOUND | WQ_FREEZABLE, 0);
168 if (!gfs2_control_wq)
171 gfs2_freeze_wq = alloc_workqueue("freeze_workqueue", 0, 0);
176 gfs2_page_pool = mempool_create_page_pool(64, 0);
180 gfs2_register_debugfs();
182 pr_info("GFS2 installed\n");
187 destroy_workqueue(gfs2_freeze_wq);
189 destroy_workqueue(gfs2_control_wq);
191 destroy_workqueue(gfs_recovery_wq);
193 unregister_filesystem(&gfs2meta_fs_type);
195 unregister_filesystem(&gfs2_fs_type);
197 list_lru_destroy(&gfs2_qd_lru);
199 unregister_shrinker(&gfs2_qd_shrinker);
202 if (gfs2_qadata_cachep)
203 kmem_cache_destroy(gfs2_qadata_cachep);
205 if (gfs2_quotad_cachep)
206 kmem_cache_destroy(gfs2_quotad_cachep);
208 if (gfs2_rgrpd_cachep)
209 kmem_cache_destroy(gfs2_rgrpd_cachep);
211 if (gfs2_bufdata_cachep)
212 kmem_cache_destroy(gfs2_bufdata_cachep);
214 if (gfs2_inode_cachep)
215 kmem_cache_destroy(gfs2_inode_cachep);
217 if (gfs2_glock_aspace_cachep)
218 kmem_cache_destroy(gfs2_glock_aspace_cachep);
220 if (gfs2_glock_cachep)
221 kmem_cache_destroy(gfs2_glock_cachep);
228 * exit_gfs2_fs - Unregister the file system
232 static void __exit exit_gfs2_fs(void)
234 unregister_shrinker(&gfs2_qd_shrinker);
236 gfs2_unregister_debugfs();
237 unregister_filesystem(&gfs2_fs_type);
238 unregister_filesystem(&gfs2meta_fs_type);
239 destroy_workqueue(gfs_recovery_wq);
240 destroy_workqueue(gfs2_control_wq);
241 destroy_workqueue(gfs2_freeze_wq);
242 list_lru_destroy(&gfs2_qd_lru);
246 mempool_destroy(gfs2_page_pool);
247 kmem_cache_destroy(gfs2_qadata_cachep);
248 kmem_cache_destroy(gfs2_quotad_cachep);
249 kmem_cache_destroy(gfs2_rgrpd_cachep);
250 kmem_cache_destroy(gfs2_bufdata_cachep);
251 kmem_cache_destroy(gfs2_inode_cachep);
252 kmem_cache_destroy(gfs2_glock_aspace_cachep);
253 kmem_cache_destroy(gfs2_glock_cachep);
258 MODULE_DESCRIPTION("Global File System");
259 MODULE_AUTHOR("Red Hat, Inc.");
260 MODULE_LICENSE("GPL");
262 module_init(init_gfs2_fs);
263 module_exit(exit_gfs2_fs);