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
gfs2_init_inode_once(void * foo)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_ordered);
42 ip->i_qadata = NULL;
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);
48 }
49
gfs2_init_glock_once(void * foo)50 static void gfs2_init_glock_once(void *foo)
51 {
52 struct gfs2_glock *gl = foo;
53
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);
60 }
61
gfs2_init_gl_aspace_once(void * foo)62 static void gfs2_init_gl_aspace_once(void *foo)
63 {
64 struct gfs2_glock_aspace *gla = foo;
65
66 gfs2_init_glock_once(&gla->glock);
67 address_space_init_once(&gla->mapping);
68 }
69
70 /**
71 * init_gfs2_fs - Register GFS2 as a filesystem
72 *
73 * Returns: 0 on success, error code on failure
74 */
75
init_gfs2_fs(void)76 static int __init init_gfs2_fs(void)
77 {
78 int error;
79
80 gfs2_str2qstr(&gfs2_qdot, ".");
81 gfs2_str2qstr(&gfs2_qdotdot, "..");
82 gfs2_quota_hash_init();
83
84 error = gfs2_sys_init();
85 if (error)
86 return error;
87
88 error = list_lru_init(&gfs2_qd_lru);
89 if (error)
90 goto fail_lru;
91
92 error = gfs2_glock_init();
93 if (error)
94 goto fail_glock;
95
96 error = -ENOMEM;
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)
102 goto fail_cachep1;
103
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);
107
108 if (!gfs2_glock_aspace_cachep)
109 goto fail_cachep2;
110
111 gfs2_inode_cachep = kmem_cache_create("gfs2_inode",
112 sizeof(struct gfs2_inode),
113 0, SLAB_RECLAIM_ACCOUNT|
114 SLAB_ACCOUNT,
115 gfs2_init_inode_once);
116 if (!gfs2_inode_cachep)
117 goto fail_cachep3;
118
119 gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata",
120 sizeof(struct gfs2_bufdata),
121 0, 0, NULL);
122 if (!gfs2_bufdata_cachep)
123 goto fail_cachep4;
124
125 gfs2_rgrpd_cachep = kmem_cache_create("gfs2_rgrpd",
126 sizeof(struct gfs2_rgrpd),
127 0, 0, NULL);
128 if (!gfs2_rgrpd_cachep)
129 goto fail_cachep5;
130
131 gfs2_quotad_cachep = kmem_cache_create("gfs2_quotad",
132 sizeof(struct gfs2_quota_data),
133 0, SLAB_RECLAIM_ACCOUNT, NULL);
134 if (!gfs2_quotad_cachep)
135 goto fail_cachep6;
136
137 gfs2_qadata_cachep = kmem_cache_create("gfs2_qadata",
138 sizeof(struct gfs2_qadata),
139 0, 0, NULL);
140 if (!gfs2_qadata_cachep)
141 goto fail_cachep7;
142
143 gfs2_trans_cachep = kmem_cache_create("gfs2_trans",
144 sizeof(struct gfs2_trans),
145 0, 0, NULL);
146 if (!gfs2_trans_cachep)
147 goto fail_cachep8;
148
149 error = gfs2_qd_shrinker_init();
150 if (error)
151 goto fail_shrinker;
152
153 error = -ENOMEM;
154 gfs2_recovery_wq = alloc_workqueue("gfs2_recovery",
155 WQ_MEM_RECLAIM | WQ_FREEZABLE, 0);
156 if (!gfs2_recovery_wq)
157 goto fail_wq1;
158
159 gfs2_control_wq = alloc_workqueue("gfs2_control",
160 WQ_UNBOUND | WQ_FREEZABLE, 0);
161 if (!gfs2_control_wq)
162 goto fail_wq2;
163
164 gfs2_freeze_wq = alloc_workqueue("gfs2_freeze", 0, 0);
165
166 if (!gfs2_freeze_wq)
167 goto fail_wq3;
168
169 gfs2_page_pool = mempool_create_page_pool(64, 0);
170 if (!gfs2_page_pool)
171 goto fail_mempool;
172
173 gfs2_register_debugfs();
174 error = register_filesystem(&gfs2_fs_type);
175 if (error)
176 goto fail_fs1;
177
178 error = register_filesystem(&gfs2meta_fs_type);
179 if (error)
180 goto fail_fs2;
181
182
183 pr_info("GFS2 installed\n");
184
185 return 0;
186
187 fail_fs2:
188 unregister_filesystem(&gfs2_fs_type);
189 fail_fs1:
190 mempool_destroy(gfs2_page_pool);
191 fail_mempool:
192 destroy_workqueue(gfs2_freeze_wq);
193 fail_wq3:
194 destroy_workqueue(gfs2_control_wq);
195 fail_wq2:
196 destroy_workqueue(gfs2_recovery_wq);
197 fail_wq1:
198 gfs2_qd_shrinker_exit();
199 fail_shrinker:
200 kmem_cache_destroy(gfs2_trans_cachep);
201 fail_cachep8:
202 kmem_cache_destroy(gfs2_qadata_cachep);
203 fail_cachep7:
204 kmem_cache_destroy(gfs2_quotad_cachep);
205 fail_cachep6:
206 kmem_cache_destroy(gfs2_rgrpd_cachep);
207 fail_cachep5:
208 kmem_cache_destroy(gfs2_bufdata_cachep);
209 fail_cachep4:
210 kmem_cache_destroy(gfs2_inode_cachep);
211 fail_cachep3:
212 kmem_cache_destroy(gfs2_glock_aspace_cachep);
213 fail_cachep2:
214 kmem_cache_destroy(gfs2_glock_cachep);
215 fail_cachep1:
216 gfs2_glock_exit();
217 fail_glock:
218 list_lru_destroy(&gfs2_qd_lru);
219 fail_lru:
220 gfs2_sys_uninit();
221 return error;
222 }
223
224 /**
225 * exit_gfs2_fs - Unregister the file system
226 *
227 */
228
exit_gfs2_fs(void)229 static void __exit exit_gfs2_fs(void)
230 {
231 gfs2_qd_shrinker_exit();
232 gfs2_glock_exit();
233 gfs2_unregister_debugfs();
234 unregister_filesystem(&gfs2_fs_type);
235 unregister_filesystem(&gfs2meta_fs_type);
236 destroy_workqueue(gfs2_recovery_wq);
237 destroy_workqueue(gfs2_control_wq);
238 destroy_workqueue(gfs2_freeze_wq);
239 list_lru_destroy(&gfs2_qd_lru);
240
241 rcu_barrier();
242
243 mempool_destroy(gfs2_page_pool);
244 kmem_cache_destroy(gfs2_trans_cachep);
245 kmem_cache_destroy(gfs2_qadata_cachep);
246 kmem_cache_destroy(gfs2_quotad_cachep);
247 kmem_cache_destroy(gfs2_rgrpd_cachep);
248 kmem_cache_destroy(gfs2_bufdata_cachep);
249 kmem_cache_destroy(gfs2_inode_cachep);
250 kmem_cache_destroy(gfs2_glock_aspace_cachep);
251 kmem_cache_destroy(gfs2_glock_cachep);
252
253 gfs2_sys_uninit();
254 }
255
256 MODULE_DESCRIPTION("Global File System");
257 MODULE_AUTHOR("Red Hat, Inc.");
258 MODULE_LICENSE("GPL");
259
260 module_init(init_gfs2_fs);
261 module_exit(exit_gfs2_fs);
262
263