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);
43 gfs2_holder_mark_uninitialized(&ip->i_rgd_gh);
44 memset(&ip->i_res, 0, sizeof(ip->i_res));
45 RB_CLEAR_NODE(&ip->i_res.rs_node);
46 ip->i_hash_cache = NULL;
47 gfs2_holder_mark_uninitialized(&ip->i_iopen_gh);
50 static void gfs2_init_glock_once(void *foo)
52 struct gfs2_glock *gl = foo;
54 spin_lock_init(&gl->gl_lockref.lock);
55 INIT_LIST_HEAD(&gl->gl_holders);
56 INIT_LIST_HEAD(&gl->gl_lru);
57 INIT_LIST_HEAD(&gl->gl_ail_list);
58 atomic_set(&gl->gl_ail_count, 0);
59 atomic_set(&gl->gl_revokes, 0);
62 static void gfs2_init_gl_aspace_once(void *foo)
64 struct gfs2_glock *gl = foo;
65 struct address_space *mapping = (struct address_space *)(gl + 1);
67 gfs2_init_glock_once(gl);
68 address_space_init_once(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),
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) +
107 sizeof(struct address_space),
108 0, 0, gfs2_init_gl_aspace_once);
110 if (!gfs2_glock_aspace_cachep)
113 gfs2_inode_cachep = kmem_cache_create("gfs2_inode",
114 sizeof(struct gfs2_inode),
115 0, SLAB_RECLAIM_ACCOUNT|
118 gfs2_init_inode_once);
119 if (!gfs2_inode_cachep)
122 gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata",
123 sizeof(struct gfs2_bufdata),
125 if (!gfs2_bufdata_cachep)
128 gfs2_rgrpd_cachep = kmem_cache_create("gfs2_rgrpd",
129 sizeof(struct gfs2_rgrpd),
131 if (!gfs2_rgrpd_cachep)
134 gfs2_quotad_cachep = kmem_cache_create("gfs2_quotad",
135 sizeof(struct gfs2_quota_data),
137 if (!gfs2_quotad_cachep)
140 gfs2_qadata_cachep = kmem_cache_create("gfs2_qadata",
141 sizeof(struct gfs2_qadata),
143 if (!gfs2_qadata_cachep)
146 error = register_shrinker(&gfs2_qd_shrinker);
150 error = register_filesystem(&gfs2_fs_type);
154 error = register_filesystem(&gfs2meta_fs_type);
159 gfs_recovery_wq = alloc_workqueue("gfs_recovery",
160 WQ_MEM_RECLAIM | WQ_FREEZABLE, 0);
161 if (!gfs_recovery_wq)
164 gfs2_control_wq = alloc_workqueue("gfs2_control",
165 WQ_UNBOUND | WQ_FREEZABLE, 0);
166 if (!gfs2_control_wq)
169 gfs2_freeze_wq = alloc_workqueue("freeze_workqueue", 0, 0);
174 gfs2_page_pool = mempool_create_page_pool(64, 0);
178 gfs2_register_debugfs();
180 pr_info("GFS2 installed\n");
185 destroy_workqueue(gfs2_freeze_wq);
187 destroy_workqueue(gfs2_control_wq);
189 destroy_workqueue(gfs_recovery_wq);
191 unregister_filesystem(&gfs2meta_fs_type);
193 unregister_filesystem(&gfs2_fs_type);
195 unregister_shrinker(&gfs2_qd_shrinker);
197 kmem_cache_destroy(gfs2_qadata_cachep);
199 kmem_cache_destroy(gfs2_quotad_cachep);
201 kmem_cache_destroy(gfs2_rgrpd_cachep);
203 kmem_cache_destroy(gfs2_bufdata_cachep);
205 kmem_cache_destroy(gfs2_inode_cachep);
207 kmem_cache_destroy(gfs2_glock_aspace_cachep);
209 kmem_cache_destroy(gfs2_glock_cachep);
213 list_lru_destroy(&gfs2_qd_lru);
220 * exit_gfs2_fs - Unregister the file system
224 static void __exit exit_gfs2_fs(void)
226 unregister_shrinker(&gfs2_qd_shrinker);
228 gfs2_unregister_debugfs();
229 unregister_filesystem(&gfs2_fs_type);
230 unregister_filesystem(&gfs2meta_fs_type);
231 destroy_workqueue(gfs_recovery_wq);
232 destroy_workqueue(gfs2_control_wq);
233 destroy_workqueue(gfs2_freeze_wq);
234 list_lru_destroy(&gfs2_qd_lru);
238 mempool_destroy(gfs2_page_pool);
239 kmem_cache_destroy(gfs2_qadata_cachep);
240 kmem_cache_destroy(gfs2_quotad_cachep);
241 kmem_cache_destroy(gfs2_rgrpd_cachep);
242 kmem_cache_destroy(gfs2_bufdata_cachep);
243 kmem_cache_destroy(gfs2_inode_cachep);
244 kmem_cache_destroy(gfs2_glock_aspace_cachep);
245 kmem_cache_destroy(gfs2_glock_cachep);
250 MODULE_DESCRIPTION("Global File System");
251 MODULE_AUTHOR("Red Hat, Inc.");
252 MODULE_LICENSE("GPL");
254 module_init(init_gfs2_fs);
255 module_exit(exit_gfs2_fs);