1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
4 * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
7 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
9 #include <linux/slab.h>
10 #include <linux/spinlock.h>
11 #include <linux/completion.h>
12 #include <linux/buffer_head.h>
13 #include <linux/module.h>
14 #include <linux/init.h>
15 #include <linux/gfs2_ondisk.h>
16 #include <linux/rcupdate.h>
17 #include <linux/rculist_bl.h>
18 #include <linux/atomic.h>
19 #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 atomic_set(&ip->i_sizehint, 0);
40 init_rwsem(&ip->i_rw_mutex);
41 INIT_LIST_HEAD(&ip->i_trunc_list);
42 INIT_LIST_HEAD(&ip->i_ordered);
44 gfs2_holder_mark_uninitialized(&ip->i_rgd_gh);
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 spin_lock_init(&gl->gl_lockref.lock);
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_aspace *gla = foo;
67 gfs2_init_glock_once(&gla->glock);
68 address_space_init_once(&gla->mapping);
72 * init_gfs2_fs - Register GFS2 as a filesystem
74 * Returns: 0 on success, error code on failure
77 static int __init init_gfs2_fs(void)
81 gfs2_str2qstr(&gfs2_qdot, ".");
82 gfs2_str2qstr(&gfs2_qdotdot, "..");
83 gfs2_quota_hash_init();
85 error = gfs2_sys_init();
89 error = list_lru_init(&gfs2_qd_lru);
93 error = gfs2_glock_init();
98 gfs2_glock_cachep = kmem_cache_create("gfs2_glock",
99 sizeof(struct gfs2_glock),
100 0, SLAB_RECLAIM_ACCOUNT,
101 gfs2_init_glock_once);
102 if (!gfs2_glock_cachep)
105 gfs2_glock_aspace_cachep = kmem_cache_create("gfs2_glock(aspace)",
106 sizeof(struct gfs2_glock_aspace),
107 0, 0, gfs2_init_gl_aspace_once);
109 if (!gfs2_glock_aspace_cachep)
112 gfs2_inode_cachep = kmem_cache_create("gfs2_inode",
113 sizeof(struct gfs2_inode),
114 0, SLAB_RECLAIM_ACCOUNT|
117 gfs2_init_inode_once);
118 if (!gfs2_inode_cachep)
121 gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata",
122 sizeof(struct gfs2_bufdata),
124 if (!gfs2_bufdata_cachep)
127 gfs2_rgrpd_cachep = kmem_cache_create("gfs2_rgrpd",
128 sizeof(struct gfs2_rgrpd),
130 if (!gfs2_rgrpd_cachep)
133 gfs2_quotad_cachep = kmem_cache_create("gfs2_quotad",
134 sizeof(struct gfs2_quota_data),
135 0, SLAB_RECLAIM_ACCOUNT, NULL);
136 if (!gfs2_quotad_cachep)
139 gfs2_qadata_cachep = kmem_cache_create("gfs2_qadata",
140 sizeof(struct gfs2_qadata),
142 if (!gfs2_qadata_cachep)
145 gfs2_trans_cachep = kmem_cache_create("gfs2_trans",
146 sizeof(struct gfs2_trans),
148 if (!gfs2_trans_cachep)
151 error = register_shrinker(&gfs2_qd_shrinker);
155 error = register_filesystem(&gfs2_fs_type);
159 error = register_filesystem(&gfs2meta_fs_type);
164 gfs_recovery_wq = alloc_workqueue("gfs_recovery",
165 WQ_MEM_RECLAIM | WQ_FREEZABLE, 0);
166 if (!gfs_recovery_wq)
169 gfs2_control_wq = alloc_workqueue("gfs2_control",
170 WQ_UNBOUND | WQ_FREEZABLE, 0);
171 if (!gfs2_control_wq)
174 gfs2_freeze_wq = alloc_workqueue("freeze_workqueue", 0, 0);
179 gfs2_page_pool = mempool_create_page_pool(64, 0);
183 gfs2_register_debugfs();
185 pr_info("GFS2 installed\n");
190 destroy_workqueue(gfs2_freeze_wq);
192 destroy_workqueue(gfs2_control_wq);
194 destroy_workqueue(gfs_recovery_wq);
196 unregister_filesystem(&gfs2meta_fs_type);
198 unregister_filesystem(&gfs2_fs_type);
200 unregister_shrinker(&gfs2_qd_shrinker);
202 kmem_cache_destroy(gfs2_trans_cachep);
204 kmem_cache_destroy(gfs2_qadata_cachep);
206 kmem_cache_destroy(gfs2_quotad_cachep);
208 kmem_cache_destroy(gfs2_rgrpd_cachep);
210 kmem_cache_destroy(gfs2_bufdata_cachep);
212 kmem_cache_destroy(gfs2_inode_cachep);
214 kmem_cache_destroy(gfs2_glock_aspace_cachep);
216 kmem_cache_destroy(gfs2_glock_cachep);
220 list_lru_destroy(&gfs2_qd_lru);
227 * exit_gfs2_fs - Unregister the file system
231 static void __exit exit_gfs2_fs(void)
233 unregister_shrinker(&gfs2_qd_shrinker);
235 gfs2_unregister_debugfs();
236 unregister_filesystem(&gfs2_fs_type);
237 unregister_filesystem(&gfs2meta_fs_type);
238 destroy_workqueue(gfs_recovery_wq);
239 destroy_workqueue(gfs2_control_wq);
240 destroy_workqueue(gfs2_freeze_wq);
241 list_lru_destroy(&gfs2_qd_lru);
245 mempool_destroy(gfs2_page_pool);
246 kmem_cache_destroy(gfs2_trans_cachep);
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);