Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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kernel
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linux
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
32struct workqueue_struct *gfs2_control_wq;
33
34static 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 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
50static 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
62static void gfs2_init_gl_aspace_once(void *foo)
63{
64 struct gfs2_glock *gl = foo;
65 struct address_space *mapping = (struct address_space *)(gl + 1);
66
67 gfs2_init_glock_once(gl);
68 address_space_init_once(mapping);
69}
70
71/**
72 * init_gfs2_fs - Register GFS2 as a filesystem
73 *
74 * Returns: 0 on success, error code on failure
75 */
76
77static int __init init_gfs2_fs(void)
78{
79 int error;
80
81 gfs2_str2qstr(&gfs2_qdot, ".");
82 gfs2_str2qstr(&gfs2_qdotdot, "..");
83 gfs2_quota_hash_init();
84
85 error = gfs2_sys_init();
86 if (error)
87 return error;
88
89 error = list_lru_init(&gfs2_qd_lru);
90 if (error)
91 goto fail_lru;
92
93 error = gfs2_glock_init();
94 if (error)
95 goto fail_glock;
96
97 error = -ENOMEM;
98 gfs2_glock_cachep = kmem_cache_create("gfs2_glock",
99 sizeof(struct gfs2_glock),
100 0, 0,
101 gfs2_init_glock_once);
102 if (!gfs2_glock_cachep)
103 goto fail_cachep1;
104
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);
109
110 if (!gfs2_glock_aspace_cachep)
111 goto fail_cachep2;
112
113 gfs2_inode_cachep = kmem_cache_create("gfs2_inode",
114 sizeof(struct gfs2_inode),
115 0, SLAB_RECLAIM_ACCOUNT|
116 SLAB_MEM_SPREAD|
117 SLAB_ACCOUNT,
118 gfs2_init_inode_once);
119 if (!gfs2_inode_cachep)
120 goto fail_cachep3;
121
122 gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata",
123 sizeof(struct gfs2_bufdata),
124 0, 0, NULL);
125 if (!gfs2_bufdata_cachep)
126 goto fail_cachep4;
127
128 gfs2_rgrpd_cachep = kmem_cache_create("gfs2_rgrpd",
129 sizeof(struct gfs2_rgrpd),
130 0, 0, NULL);
131 if (!gfs2_rgrpd_cachep)
132 goto fail_cachep5;
133
134 gfs2_quotad_cachep = kmem_cache_create("gfs2_quotad",
135 sizeof(struct gfs2_quota_data),
136 0, 0, NULL);
137 if (!gfs2_quotad_cachep)
138 goto fail_cachep6;
139
140 gfs2_qadata_cachep = kmem_cache_create("gfs2_qadata",
141 sizeof(struct gfs2_qadata),
142 0, 0, NULL);
143 if (!gfs2_qadata_cachep)
144 goto fail_cachep7;
145
146 error = register_shrinker(&gfs2_qd_shrinker);
147 if (error)
148 goto fail_shrinker;
149
150 error = register_filesystem(&gfs2_fs_type);
151 if (error)
152 goto fail_fs1;
153
154 error = register_filesystem(&gfs2meta_fs_type);
155 if (error)
156 goto fail_fs2;
157
158 error = -ENOMEM;
159 gfs_recovery_wq = alloc_workqueue("gfs_recovery",
160 WQ_MEM_RECLAIM | WQ_FREEZABLE, 0);
161 if (!gfs_recovery_wq)
162 goto fail_wq1;
163
164 gfs2_control_wq = alloc_workqueue("gfs2_control",
165 WQ_UNBOUND | WQ_FREEZABLE, 0);
166 if (!gfs2_control_wq)
167 goto fail_wq2;
168
169 gfs2_freeze_wq = alloc_workqueue("freeze_workqueue", 0, 0);
170
171 if (!gfs2_freeze_wq)
172 goto fail_wq3;
173
174 gfs2_page_pool = mempool_create_page_pool(64, 0);
175 if (!gfs2_page_pool)
176 goto fail_mempool;
177
178 gfs2_register_debugfs();
179
180 pr_info("GFS2 installed\n");
181
182 return 0;
183
184fail_mempool:
185 destroy_workqueue(gfs2_freeze_wq);
186fail_wq3:
187 destroy_workqueue(gfs2_control_wq);
188fail_wq2:
189 destroy_workqueue(gfs_recovery_wq);
190fail_wq1:
191 unregister_filesystem(&gfs2meta_fs_type);
192fail_fs2:
193 unregister_filesystem(&gfs2_fs_type);
194fail_fs1:
195 unregister_shrinker(&gfs2_qd_shrinker);
196fail_shrinker:
197 kmem_cache_destroy(gfs2_qadata_cachep);
198fail_cachep7:
199 kmem_cache_destroy(gfs2_quotad_cachep);
200fail_cachep6:
201 kmem_cache_destroy(gfs2_rgrpd_cachep);
202fail_cachep5:
203 kmem_cache_destroy(gfs2_bufdata_cachep);
204fail_cachep4:
205 kmem_cache_destroy(gfs2_inode_cachep);
206fail_cachep3:
207 kmem_cache_destroy(gfs2_glock_aspace_cachep);
208fail_cachep2:
209 kmem_cache_destroy(gfs2_glock_cachep);
210fail_cachep1:
211 gfs2_glock_exit();
212fail_glock:
213 list_lru_destroy(&gfs2_qd_lru);
214fail_lru:
215 gfs2_sys_uninit();
216 return error;
217}
218
219/**
220 * exit_gfs2_fs - Unregister the file system
221 *
222 */
223
224static void __exit exit_gfs2_fs(void)
225{
226 unregister_shrinker(&gfs2_qd_shrinker);
227 gfs2_glock_exit();
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);
235
236 rcu_barrier();
237
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);
246
247 gfs2_sys_uninit();
248}
249
250MODULE_DESCRIPTION("Global File System");
251MODULE_AUTHOR("Red Hat, Inc.");
252MODULE_LICENSE("GPL");
253
254module_init(init_gfs2_fs);
255module_exit(exit_gfs2_fs);
256