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1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
4 * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
5 */
6
7 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
8
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>
20
21 #include "gfs2.h"
22 #include "incore.h"
23 #include "super.h"
24 #include "sys.h"
25 #include "util.h"
26 #include "glock.h"
27 #include "quota.h"
28 #include "recovery.h"
29 #include "dir.h"
30 #include "glops.h"
31
32 struct workqueue_struct *gfs2_control_wq;
33
34 static void gfs2_init_inode_once(void *foo)
35 {
36 struct gfs2_inode *ip = foo;
37
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);
43 ip->i_qadata = NULL;
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);
49 }
50
51 static void gfs2_init_glock_once(void *foo)
52 {
53 struct gfs2_glock *gl = foo;
54
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);
61 }
62
63 static void gfs2_init_gl_aspace_once(void *foo)
64 {
65 struct gfs2_glock *gl = foo;
66 struct address_space *mapping = (struct address_space *)(gl + 1);
67
68 gfs2_init_glock_once(gl);
69 address_space_init_once(mapping);
70 }
71
72 /**
73 * init_gfs2_fs - Register GFS2 as a filesystem
74 *
75 * Returns: 0 on success, error code on failure
76 */
77
78 static int __init init_gfs2_fs(void)
79 {
80 int error;
81
82 gfs2_str2qstr(&gfs2_qdot, ".");
83 gfs2_str2qstr(&gfs2_qdotdot, "..");
84 gfs2_quota_hash_init();
85
86 error = gfs2_sys_init();
87 if (error)
88 return error;
89
90 error = list_lru_init(&gfs2_qd_lru);
91 if (error)
92 goto fail_lru;
93
94 error = gfs2_glock_init();
95 if (error)
96 goto fail_glock;
97
98 error = -ENOMEM;
99 gfs2_glock_cachep = kmem_cache_create("gfs2_glock",
100 sizeof(struct gfs2_glock),
101 0, 0,
102 gfs2_init_glock_once);
103 if (!gfs2_glock_cachep)
104 goto fail_cachep1;
105
106 gfs2_glock_aspace_cachep = kmem_cache_create("gfs2_glock(aspace)",
107 sizeof(struct gfs2_glock) +
108 sizeof(struct address_space),
109 0, 0, gfs2_init_gl_aspace_once);
110
111 if (!gfs2_glock_aspace_cachep)
112 goto fail_cachep2;
113
114 gfs2_inode_cachep = kmem_cache_create("gfs2_inode",
115 sizeof(struct gfs2_inode),
116 0, SLAB_RECLAIM_ACCOUNT|
117 SLAB_MEM_SPREAD|
118 SLAB_ACCOUNT,
119 gfs2_init_inode_once);
120 if (!gfs2_inode_cachep)
121 goto fail_cachep3;
122
123 gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata",
124 sizeof(struct gfs2_bufdata),
125 0, 0, NULL);
126 if (!gfs2_bufdata_cachep)
127 goto fail_cachep4;
128
129 gfs2_rgrpd_cachep = kmem_cache_create("gfs2_rgrpd",
130 sizeof(struct gfs2_rgrpd),
131 0, 0, NULL);
132 if (!gfs2_rgrpd_cachep)
133 goto fail_cachep5;
134
135 gfs2_quotad_cachep = kmem_cache_create("gfs2_quotad",
136 sizeof(struct gfs2_quota_data),
137 0, 0, NULL);
138 if (!gfs2_quotad_cachep)
139 goto fail_cachep6;
140
141 gfs2_qadata_cachep = kmem_cache_create("gfs2_qadata",
142 sizeof(struct gfs2_qadata),
143 0, 0, NULL);
144 if (!gfs2_qadata_cachep)
145 goto fail_cachep7;
146
147 gfs2_trans_cachep = kmem_cache_create("gfs2_trans",
148 sizeof(struct gfs2_trans),
149 0, 0, NULL);
150 if (!gfs2_trans_cachep)
151 goto fail_cachep8;
152
153 error = register_shrinker(&gfs2_qd_shrinker);
154 if (error)
155 goto fail_shrinker;
156
157 error = register_filesystem(&gfs2_fs_type);
158 if (error)
159 goto fail_fs1;
160
161 error = register_filesystem(&gfs2meta_fs_type);
162 if (error)
163 goto fail_fs2;
164
165 error = -ENOMEM;
166 gfs_recovery_wq = alloc_workqueue("gfs_recovery",
167 WQ_MEM_RECLAIM | WQ_FREEZABLE, 0);
168 if (!gfs_recovery_wq)
169 goto fail_wq1;
170
171 gfs2_control_wq = alloc_workqueue("gfs2_control",
172 WQ_UNBOUND | WQ_FREEZABLE, 0);
173 if (!gfs2_control_wq)
174 goto fail_wq2;
175
176 gfs2_freeze_wq = alloc_workqueue("freeze_workqueue", 0, 0);
177
178 if (!gfs2_freeze_wq)
179 goto fail_wq3;
180
181 gfs2_page_pool = mempool_create_page_pool(64, 0);
182 if (!gfs2_page_pool)
183 goto fail_mempool;
184
185 gfs2_register_debugfs();
186
187 pr_info("GFS2 installed\n");
188
189 return 0;
190
191 fail_mempool:
192 destroy_workqueue(gfs2_freeze_wq);
193 fail_wq3:
194 destroy_workqueue(gfs2_control_wq);
195 fail_wq2:
196 destroy_workqueue(gfs_recovery_wq);
197 fail_wq1:
198 unregister_filesystem(&gfs2meta_fs_type);
199 fail_fs2:
200 unregister_filesystem(&gfs2_fs_type);
201 fail_fs1:
202 unregister_shrinker(&gfs2_qd_shrinker);
203 fail_shrinker:
204 kmem_cache_destroy(gfs2_trans_cachep);
205 fail_cachep8:
206 kmem_cache_destroy(gfs2_qadata_cachep);
207 fail_cachep7:
208 kmem_cache_destroy(gfs2_quotad_cachep);
209 fail_cachep6:
210 kmem_cache_destroy(gfs2_rgrpd_cachep);
211 fail_cachep5:
212 kmem_cache_destroy(gfs2_bufdata_cachep);
213 fail_cachep4:
214 kmem_cache_destroy(gfs2_inode_cachep);
215 fail_cachep3:
216 kmem_cache_destroy(gfs2_glock_aspace_cachep);
217 fail_cachep2:
218 kmem_cache_destroy(gfs2_glock_cachep);
219 fail_cachep1:
220 gfs2_glock_exit();
221 fail_glock:
222 list_lru_destroy(&gfs2_qd_lru);
223 fail_lru:
224 gfs2_sys_uninit();
225 return error;
226 }
227
228 /**
229 * exit_gfs2_fs - Unregister the file system
230 *
231 */
232
233 static void __exit exit_gfs2_fs(void)
234 {
235 unregister_shrinker(&gfs2_qd_shrinker);
236 gfs2_glock_exit();
237 gfs2_unregister_debugfs();
238 unregister_filesystem(&gfs2_fs_type);
239 unregister_filesystem(&gfs2meta_fs_type);
240 destroy_workqueue(gfs_recovery_wq);
241 destroy_workqueue(gfs2_control_wq);
242 destroy_workqueue(gfs2_freeze_wq);
243 list_lru_destroy(&gfs2_qd_lru);
244
245 rcu_barrier();
246
247 mempool_destroy(gfs2_page_pool);
248 kmem_cache_destroy(gfs2_trans_cachep);
249 kmem_cache_destroy(gfs2_qadata_cachep);
250 kmem_cache_destroy(gfs2_quotad_cachep);
251 kmem_cache_destroy(gfs2_rgrpd_cachep);
252 kmem_cache_destroy(gfs2_bufdata_cachep);
253 kmem_cache_destroy(gfs2_inode_cachep);
254 kmem_cache_destroy(gfs2_glock_aspace_cachep);
255 kmem_cache_destroy(gfs2_glock_cachep);
256
257 gfs2_sys_uninit();
258 }
259
260 MODULE_DESCRIPTION("Global File System");
261 MODULE_AUTHOR("Red Hat, Inc.");
262 MODULE_LICENSE("GPL");
263
264 module_init(init_gfs2_fs);
265 module_exit(exit_gfs2_fs);
266