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 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
51static 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
63static void gfs2_init_gl_aspace_once(void *foo)
64{
65 struct gfs2_glock_aspace *gla = foo;
66
67 gfs2_init_glock_once(&gla->glock);
68 address_space_init_once(&gla->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, SLAB_RECLAIM_ACCOUNT,
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_aspace),
107 0, 0, gfs2_init_gl_aspace_once);
108
109 if (!gfs2_glock_aspace_cachep)
110 goto fail_cachep2;
111
112 gfs2_inode_cachep = kmem_cache_create("gfs2_inode",
113 sizeof(struct gfs2_inode),
114 0, SLAB_RECLAIM_ACCOUNT|
115 SLAB_MEM_SPREAD|
116 SLAB_ACCOUNT,
117 gfs2_init_inode_once);
118 if (!gfs2_inode_cachep)
119 goto fail_cachep3;
120
121 gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata",
122 sizeof(struct gfs2_bufdata),
123 0, 0, NULL);
124 if (!gfs2_bufdata_cachep)
125 goto fail_cachep4;
126
127 gfs2_rgrpd_cachep = kmem_cache_create("gfs2_rgrpd",
128 sizeof(struct gfs2_rgrpd),
129 0, 0, NULL);
130 if (!gfs2_rgrpd_cachep)
131 goto fail_cachep5;
132
133 gfs2_quotad_cachep = kmem_cache_create("gfs2_quotad",
134 sizeof(struct gfs2_quota_data),
135 0, SLAB_RECLAIM_ACCOUNT, NULL);
136 if (!gfs2_quotad_cachep)
137 goto fail_cachep6;
138
139 gfs2_qadata_cachep = kmem_cache_create("gfs2_qadata",
140 sizeof(struct gfs2_qadata),
141 0, 0, NULL);
142 if (!gfs2_qadata_cachep)
143 goto fail_cachep7;
144
145 gfs2_trans_cachep = kmem_cache_create("gfs2_trans",
146 sizeof(struct gfs2_trans),
147 0, 0, NULL);
148 if (!gfs2_trans_cachep)
149 goto fail_cachep8;
150
151 error = register_shrinker(&gfs2_qd_shrinker);
152 if (error)
153 goto fail_shrinker;
154
155 error = register_filesystem(&gfs2_fs_type);
156 if (error)
157 goto fail_fs1;
158
159 error = register_filesystem(&gfs2meta_fs_type);
160 if (error)
161 goto fail_fs2;
162
163 error = -ENOMEM;
164 gfs_recovery_wq = alloc_workqueue("gfs_recovery",
165 WQ_MEM_RECLAIM | WQ_FREEZABLE, 0);
166 if (!gfs_recovery_wq)
167 goto fail_wq1;
168
169 gfs2_control_wq = alloc_workqueue("gfs2_control",
170 WQ_UNBOUND | WQ_FREEZABLE, 0);
171 if (!gfs2_control_wq)
172 goto fail_wq2;
173
174 gfs2_freeze_wq = alloc_workqueue("freeze_workqueue", 0, 0);
175
176 if (!gfs2_freeze_wq)
177 goto fail_wq3;
178
179 gfs2_page_pool = mempool_create_page_pool(64, 0);
180 if (!gfs2_page_pool)
181 goto fail_mempool;
182
183 gfs2_register_debugfs();
184
185 pr_info("GFS2 installed\n");
186
187 return 0;
188
189fail_mempool:
190 destroy_workqueue(gfs2_freeze_wq);
191fail_wq3:
192 destroy_workqueue(gfs2_control_wq);
193fail_wq2:
194 destroy_workqueue(gfs_recovery_wq);
195fail_wq1:
196 unregister_filesystem(&gfs2meta_fs_type);
197fail_fs2:
198 unregister_filesystem(&gfs2_fs_type);
199fail_fs1:
200 unregister_shrinker(&gfs2_qd_shrinker);
201fail_shrinker:
202 kmem_cache_destroy(gfs2_trans_cachep);
203fail_cachep8:
204 kmem_cache_destroy(gfs2_qadata_cachep);
205fail_cachep7:
206 kmem_cache_destroy(gfs2_quotad_cachep);
207fail_cachep6:
208 kmem_cache_destroy(gfs2_rgrpd_cachep);
209fail_cachep5:
210 kmem_cache_destroy(gfs2_bufdata_cachep);
211fail_cachep4:
212 kmem_cache_destroy(gfs2_inode_cachep);
213fail_cachep3:
214 kmem_cache_destroy(gfs2_glock_aspace_cachep);
215fail_cachep2:
216 kmem_cache_destroy(gfs2_glock_cachep);
217fail_cachep1:
218 gfs2_glock_exit();
219fail_glock:
220 list_lru_destroy(&gfs2_qd_lru);
221fail_lru:
222 gfs2_sys_uninit();
223 return error;
224}
225
226/**
227 * exit_gfs2_fs - Unregister the file system
228 *
229 */
230
231static void __exit exit_gfs2_fs(void)
232{
233 unregister_shrinker(&gfs2_qd_shrinker);
234 gfs2_glock_exit();
235 gfs2_unregister_debugfs();
236 unregister_filesystem(&gfs2_fs_type);
237 unregister_filesystem(&gfs2meta_fs_type);
238 destroy_workqueue(gfs_recovery_wq);
239 destroy_workqueue(gfs2_control_wq);
240 destroy_workqueue(gfs2_freeze_wq);
241 list_lru_destroy(&gfs2_qd_lru);
242
243 rcu_barrier();
244
245 mempool_destroy(gfs2_page_pool);
246 kmem_cache_destroy(gfs2_trans_cachep);
247 kmem_cache_destroy(gfs2_qadata_cachep);
248 kmem_cache_destroy(gfs2_quotad_cachep);
249 kmem_cache_destroy(gfs2_rgrpd_cachep);
250 kmem_cache_destroy(gfs2_bufdata_cachep);
251 kmem_cache_destroy(gfs2_inode_cachep);
252 kmem_cache_destroy(gfs2_glock_aspace_cachep);
253 kmem_cache_destroy(gfs2_glock_cachep);
254
255 gfs2_sys_uninit();
256}
257
258MODULE_DESCRIPTION("Global File System");
259MODULE_AUTHOR("Red Hat, Inc.");
260MODULE_LICENSE("GPL");
261
262module_init(init_gfs2_fs);
263module_exit(exit_gfs2_fs);
264