Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1/*
2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3 * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
4 *
5 * This copyrighted material is made available to anyone wishing to use,
6 * modify, copy, or redistribute it subject to the terms and conditions
7 * of the GNU General Public License version 2.
8 */
9
10#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
11
12#include <linux/slab.h>
13#include <linux/spinlock.h>
14#include <linux/completion.h>
15#include <linux/buffer_head.h>
16#include <linux/module.h>
17#include <linux/init.h>
18#include <linux/gfs2_ondisk.h>
19#include <linux/rcupdate.h>
20#include <linux/rculist_bl.h>
21#include <linux/atomic.h>
22#include <linux/mempool.h>
23
24#include "gfs2.h"
25#include "incore.h"
26#include "super.h"
27#include "sys.h"
28#include "util.h"
29#include "glock.h"
30#include "quota.h"
31#include "recovery.h"
32#include "dir.h"
33#include "glops.h"
34
35struct workqueue_struct *gfs2_control_wq;
36
37static void gfs2_init_inode_once(void *foo)
38{
39 struct gfs2_inode *ip = foo;
40
41 inode_init_once(&ip->i_inode);
42 atomic_set(&ip->i_sizehint, 0);
43 init_rwsem(&ip->i_rw_mutex);
44 INIT_LIST_HEAD(&ip->i_trunc_list);
45 ip->i_qadata = NULL;
46 gfs2_holder_mark_uninitialized(&ip->i_rgd_gh);
47 memset(&ip->i_res, 0, sizeof(ip->i_res));
48 RB_CLEAR_NODE(&ip->i_res.rs_node);
49 ip->i_hash_cache = NULL;
50 gfs2_holder_mark_uninitialized(&ip->i_iopen_gh);
51}
52
53static void gfs2_init_glock_once(void *foo)
54{
55 struct gfs2_glock *gl = foo;
56
57 spin_lock_init(&gl->gl_lockref.lock);
58 INIT_LIST_HEAD(&gl->gl_holders);
59 INIT_LIST_HEAD(&gl->gl_lru);
60 INIT_LIST_HEAD(&gl->gl_ail_list);
61 atomic_set(&gl->gl_ail_count, 0);
62 atomic_set(&gl->gl_revokes, 0);
63}
64
65static void gfs2_init_gl_aspace_once(void *foo)
66{
67 struct gfs2_glock *gl = foo;
68 struct address_space *mapping = (struct address_space *)(gl + 1);
69
70 gfs2_init_glock_once(gl);
71 address_space_init_once(mapping);
72}
73
74/**
75 * init_gfs2_fs - Register GFS2 as a filesystem
76 *
77 * Returns: 0 on success, error code on failure
78 */
79
80static int __init init_gfs2_fs(void)
81{
82 int error;
83
84 gfs2_str2qstr(&gfs2_qdot, ".");
85 gfs2_str2qstr(&gfs2_qdotdot, "..");
86 gfs2_quota_hash_init();
87
88 error = gfs2_sys_init();
89 if (error)
90 return error;
91
92 error = list_lru_init(&gfs2_qd_lru);
93 if (error)
94 goto fail_lru;
95
96 error = gfs2_glock_init();
97 if (error)
98 goto fail_glock;
99
100 error = -ENOMEM;
101 gfs2_glock_cachep = kmem_cache_create("gfs2_glock",
102 sizeof(struct gfs2_glock),
103 0, 0,
104 gfs2_init_glock_once);
105 if (!gfs2_glock_cachep)
106 goto fail_cachep1;
107
108 gfs2_glock_aspace_cachep = kmem_cache_create("gfs2_glock(aspace)",
109 sizeof(struct gfs2_glock) +
110 sizeof(struct address_space),
111 0, 0, gfs2_init_gl_aspace_once);
112
113 if (!gfs2_glock_aspace_cachep)
114 goto fail_cachep2;
115
116 gfs2_inode_cachep = kmem_cache_create("gfs2_inode",
117 sizeof(struct gfs2_inode),
118 0, SLAB_RECLAIM_ACCOUNT|
119 SLAB_MEM_SPREAD|
120 SLAB_ACCOUNT,
121 gfs2_init_inode_once);
122 if (!gfs2_inode_cachep)
123 goto fail_cachep3;
124
125 gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata",
126 sizeof(struct gfs2_bufdata),
127 0, 0, NULL);
128 if (!gfs2_bufdata_cachep)
129 goto fail_cachep4;
130
131 gfs2_rgrpd_cachep = kmem_cache_create("gfs2_rgrpd",
132 sizeof(struct gfs2_rgrpd),
133 0, 0, NULL);
134 if (!gfs2_rgrpd_cachep)
135 goto fail_cachep5;
136
137 gfs2_quotad_cachep = kmem_cache_create("gfs2_quotad",
138 sizeof(struct gfs2_quota_data),
139 0, 0, NULL);
140 if (!gfs2_quotad_cachep)
141 goto fail_cachep6;
142
143 gfs2_qadata_cachep = kmem_cache_create("gfs2_qadata",
144 sizeof(struct gfs2_qadata),
145 0, 0, NULL);
146 if (!gfs2_qadata_cachep)
147 goto fail_cachep7;
148
149 error = register_shrinker(&gfs2_qd_shrinker);
150 if (error)
151 goto fail_shrinker;
152
153 error = register_filesystem(&gfs2_fs_type);
154 if (error)
155 goto fail_fs1;
156
157 error = register_filesystem(&gfs2meta_fs_type);
158 if (error)
159 goto fail_fs2;
160
161 error = -ENOMEM;
162 gfs_recovery_wq = alloc_workqueue("gfs_recovery",
163 WQ_MEM_RECLAIM | WQ_FREEZABLE, 0);
164 if (!gfs_recovery_wq)
165 goto fail_wq1;
166
167 gfs2_control_wq = alloc_workqueue("gfs2_control",
168 WQ_UNBOUND | WQ_FREEZABLE, 0);
169 if (!gfs2_control_wq)
170 goto fail_wq2;
171
172 gfs2_freeze_wq = alloc_workqueue("freeze_workqueue", 0, 0);
173
174 if (!gfs2_freeze_wq)
175 goto fail_wq3;
176
177 gfs2_page_pool = mempool_create_page_pool(64, 0);
178 if (!gfs2_page_pool)
179 goto fail_mempool;
180
181 gfs2_register_debugfs();
182
183 pr_info("GFS2 installed\n");
184
185 return 0;
186
187fail_mempool:
188 destroy_workqueue(gfs2_freeze_wq);
189fail_wq3:
190 destroy_workqueue(gfs2_control_wq);
191fail_wq2:
192 destroy_workqueue(gfs_recovery_wq);
193fail_wq1:
194 unregister_filesystem(&gfs2meta_fs_type);
195fail_fs2:
196 unregister_filesystem(&gfs2_fs_type);
197fail_fs1:
198 unregister_shrinker(&gfs2_qd_shrinker);
199fail_shrinker:
200 kmem_cache_destroy(gfs2_qadata_cachep);
201fail_cachep7:
202 kmem_cache_destroy(gfs2_quotad_cachep);
203fail_cachep6:
204 kmem_cache_destroy(gfs2_rgrpd_cachep);
205fail_cachep5:
206 kmem_cache_destroy(gfs2_bufdata_cachep);
207fail_cachep4:
208 kmem_cache_destroy(gfs2_inode_cachep);
209fail_cachep3:
210 kmem_cache_destroy(gfs2_glock_aspace_cachep);
211fail_cachep2:
212 kmem_cache_destroy(gfs2_glock_cachep);
213fail_cachep1:
214 gfs2_glock_exit();
215fail_glock:
216 list_lru_destroy(&gfs2_qd_lru);
217fail_lru:
218 gfs2_sys_uninit();
219 return error;
220}
221
222/**
223 * exit_gfs2_fs - Unregister the file system
224 *
225 */
226
227static void __exit exit_gfs2_fs(void)
228{
229 unregister_shrinker(&gfs2_qd_shrinker);
230 gfs2_glock_exit();
231 gfs2_unregister_debugfs();
232 unregister_filesystem(&gfs2_fs_type);
233 unregister_filesystem(&gfs2meta_fs_type);
234 destroy_workqueue(gfs_recovery_wq);
235 destroy_workqueue(gfs2_control_wq);
236 destroy_workqueue(gfs2_freeze_wq);
237 list_lru_destroy(&gfs2_qd_lru);
238
239 rcu_barrier();
240
241 mempool_destroy(gfs2_page_pool);
242 kmem_cache_destroy(gfs2_qadata_cachep);
243 kmem_cache_destroy(gfs2_quotad_cachep);
244 kmem_cache_destroy(gfs2_rgrpd_cachep);
245 kmem_cache_destroy(gfs2_bufdata_cachep);
246 kmem_cache_destroy(gfs2_inode_cachep);
247 kmem_cache_destroy(gfs2_glock_aspace_cachep);
248 kmem_cache_destroy(gfs2_glock_cachep);
249
250 gfs2_sys_uninit();
251}
252
253MODULE_DESCRIPTION("Global File System");
254MODULE_AUTHOR("Red Hat, Inc.");
255MODULE_LICENSE("GPL");
256
257module_init(init_gfs2_fs);
258module_exit(exit_gfs2_fs);
259