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git.ipfire.org Git - people/ms/linux.git/blob - fs/gfs2/main.c
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_ordered
);
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_aspace
*gla
= foo
;
66 gfs2_init_glock_once(&gla
->glock
);
67 address_space_init_once(&gla
->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
, "..");
82 gfs2_quota_hash_init();
84 error
= gfs2_sys_init();
88 error
= list_lru_init(&gfs2_qd_lru
);
92 error
= gfs2_glock_init();
97 gfs2_glock_cachep
= kmem_cache_create("gfs2_glock",
98 sizeof(struct gfs2_glock
),
99 0, SLAB_RECLAIM_ACCOUNT
,
100 gfs2_init_glock_once
);
101 if (!gfs2_glock_cachep
)
104 gfs2_glock_aspace_cachep
= kmem_cache_create("gfs2_glock(aspace)",
105 sizeof(struct gfs2_glock_aspace
),
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
|
116 gfs2_init_inode_once
);
117 if (!gfs2_inode_cachep
)
120 gfs2_bufdata_cachep
= kmem_cache_create("gfs2_bufdata",
121 sizeof(struct gfs2_bufdata
),
123 if (!gfs2_bufdata_cachep
)
126 gfs2_rgrpd_cachep
= kmem_cache_create("gfs2_rgrpd",
127 sizeof(struct gfs2_rgrpd
),
129 if (!gfs2_rgrpd_cachep
)
132 gfs2_quotad_cachep
= kmem_cache_create("gfs2_quotad",
133 sizeof(struct gfs2_quota_data
),
134 0, SLAB_RECLAIM_ACCOUNT
, NULL
);
135 if (!gfs2_quotad_cachep
)
138 gfs2_qadata_cachep
= kmem_cache_create("gfs2_qadata",
139 sizeof(struct gfs2_qadata
),
141 if (!gfs2_qadata_cachep
)
144 gfs2_trans_cachep
= kmem_cache_create("gfs2_trans",
145 sizeof(struct gfs2_trans
),
147 if (!gfs2_trans_cachep
)
150 error
= register_shrinker(&gfs2_qd_shrinker
, "gfs2-qd");
154 error
= register_filesystem(&gfs2_fs_type
);
158 error
= register_filesystem(&gfs2meta_fs_type
);
163 gfs_recovery_wq
= alloc_workqueue("gfs_recovery",
164 WQ_MEM_RECLAIM
| WQ_FREEZABLE
, 0);
165 if (!gfs_recovery_wq
)
168 gfs2_control_wq
= alloc_workqueue("gfs2_control",
169 WQ_UNBOUND
| WQ_FREEZABLE
, 0);
170 if (!gfs2_control_wq
)
173 gfs2_freeze_wq
= alloc_workqueue("freeze_workqueue", 0, 0);
178 gfs2_page_pool
= mempool_create_page_pool(64, 0);
182 gfs2_register_debugfs();
184 pr_info("GFS2 installed\n");
189 destroy_workqueue(gfs2_freeze_wq
);
191 destroy_workqueue(gfs2_control_wq
);
193 destroy_workqueue(gfs_recovery_wq
);
195 unregister_filesystem(&gfs2meta_fs_type
);
197 unregister_filesystem(&gfs2_fs_type
);
199 unregister_shrinker(&gfs2_qd_shrinker
);
201 kmem_cache_destroy(gfs2_trans_cachep
);
203 kmem_cache_destroy(gfs2_qadata_cachep
);
205 kmem_cache_destroy(gfs2_quotad_cachep
);
207 kmem_cache_destroy(gfs2_rgrpd_cachep
);
209 kmem_cache_destroy(gfs2_bufdata_cachep
);
211 kmem_cache_destroy(gfs2_inode_cachep
);
213 kmem_cache_destroy(gfs2_glock_aspace_cachep
);
215 kmem_cache_destroy(gfs2_glock_cachep
);
219 list_lru_destroy(&gfs2_qd_lru
);
226 * exit_gfs2_fs - Unregister the file system
230 static void __exit
exit_gfs2_fs(void)
232 unregister_shrinker(&gfs2_qd_shrinker
);
234 gfs2_unregister_debugfs();
235 unregister_filesystem(&gfs2_fs_type
);
236 unregister_filesystem(&gfs2meta_fs_type
);
237 destroy_workqueue(gfs_recovery_wq
);
238 destroy_workqueue(gfs2_control_wq
);
239 destroy_workqueue(gfs2_freeze_wq
);
240 list_lru_destroy(&gfs2_qd_lru
);
244 mempool_destroy(gfs2_page_pool
);
245 kmem_cache_destroy(gfs2_trans_cachep
);
246 kmem_cache_destroy(gfs2_qadata_cachep
);
247 kmem_cache_destroy(gfs2_quotad_cachep
);
248 kmem_cache_destroy(gfs2_rgrpd_cachep
);
249 kmem_cache_destroy(gfs2_bufdata_cachep
);
250 kmem_cache_destroy(gfs2_inode_cachep
);
251 kmem_cache_destroy(gfs2_glock_aspace_cachep
);
252 kmem_cache_destroy(gfs2_glock_cachep
);
257 MODULE_DESCRIPTION("Global File System");
258 MODULE_AUTHOR("Red Hat, Inc.");
259 MODULE_LICENSE("GPL");
261 module_init(init_gfs2_fs
);
262 module_exit(exit_gfs2_fs
);