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_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
50static void gfs2_init_glock_once(void *foo)
51{
52 struct gfs2_glock *gl = foo;
53
54 INIT_LIST_HEAD(&gl->gl_holders);
55 INIT_LIST_HEAD(&gl->gl_lru);
56 INIT_LIST_HEAD(&gl->gl_ail_list);
57 atomic_set(&gl->gl_ail_count, 0);
58 atomic_set(&gl->gl_revokes, 0);
59}
60
61static void gfs2_init_gl_aspace_once(void *foo)
62{
63 struct gfs2_glock_aspace *gla = foo;
64
65 gfs2_init_glock_once(&gla->glock);
66 address_space_init_once(&gla->mapping);
67}
68
69/**
70 * init_gfs2_fs - Register GFS2 as a filesystem
71 *
72 * Returns: 0 on success, error code on failure
73 */
74
75static int __init init_gfs2_fs(void)
76{
77 int error;
78
79 gfs2_str2qstr(&gfs2_qdot, ".");
80 gfs2_str2qstr(&gfs2_qdotdot, "..");
81 gfs2_quota_hash_init();
82
83 error = gfs2_sys_init();
84 if (error)
85 return error;
86
87 error = list_lru_init(&gfs2_qd_lru);
88 if (error)
89 goto fail_lru;
90
91 error = gfs2_glock_init();
92 if (error)
93 goto fail_glock;
94
95 error = -ENOMEM;
96 gfs2_glock_cachep = kmem_cache_create("gfs2_glock",
97 sizeof(struct gfs2_glock),
98 0, SLAB_RECLAIM_ACCOUNT,
99 gfs2_init_glock_once);
100 if (!gfs2_glock_cachep)
101 goto fail_cachep1;
102
103 gfs2_glock_aspace_cachep = kmem_cache_create("gfs2_glock(aspace)",
104 sizeof(struct gfs2_glock_aspace),
105 0, 0, gfs2_init_gl_aspace_once);
106
107 if (!gfs2_glock_aspace_cachep)
108 goto fail_cachep2;
109
110 gfs2_inode_cachep = kmem_cache_create("gfs2_inode",
111 sizeof(struct gfs2_inode),
112 0, SLAB_RECLAIM_ACCOUNT|
113 SLAB_ACCOUNT,
114 gfs2_init_inode_once);
115 if (!gfs2_inode_cachep)
116 goto fail_cachep3;
117
118 gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata",
119 sizeof(struct gfs2_bufdata),
120 0, 0, NULL);
121 if (!gfs2_bufdata_cachep)
122 goto fail_cachep4;
123
124 gfs2_rgrpd_cachep = kmem_cache_create("gfs2_rgrpd",
125 sizeof(struct gfs2_rgrpd),
126 0, 0, NULL);
127 if (!gfs2_rgrpd_cachep)
128 goto fail_cachep5;
129
130 gfs2_quotad_cachep = kmem_cache_create("gfs2_quotad",
131 sizeof(struct gfs2_quota_data),
132 0, SLAB_RECLAIM_ACCOUNT, NULL);
133 if (!gfs2_quotad_cachep)
134 goto fail_cachep6;
135
136 gfs2_qadata_cachep = kmem_cache_create("gfs2_qadata",
137 sizeof(struct gfs2_qadata),
138 0, 0, NULL);
139 if (!gfs2_qadata_cachep)
140 goto fail_cachep7;
141
142 gfs2_trans_cachep = kmem_cache_create("gfs2_trans",
143 sizeof(struct gfs2_trans),
144 0, 0, NULL);
145 if (!gfs2_trans_cachep)
146 goto fail_cachep8;
147
148 error = gfs2_qd_shrinker_init();
149 if (error)
150 goto fail_shrinker;
151
152 error = -ENOMEM;
153 gfs2_recovery_wq = alloc_workqueue("gfs2_recovery",
154 WQ_MEM_RECLAIM | WQ_FREEZABLE | WQ_PERCPU,
155 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", WQ_PERCPU, 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
187fail_fs2:
188 unregister_filesystem(&gfs2_fs_type);
189fail_fs1:
190 mempool_destroy(gfs2_page_pool);
191fail_mempool:
192 destroy_workqueue(gfs2_freeze_wq);
193fail_wq3:
194 destroy_workqueue(gfs2_control_wq);
195fail_wq2:
196 destroy_workqueue(gfs2_recovery_wq);
197fail_wq1:
198 gfs2_qd_shrinker_exit();
199fail_shrinker:
200 kmem_cache_destroy(gfs2_trans_cachep);
201fail_cachep8:
202 kmem_cache_destroy(gfs2_qadata_cachep);
203fail_cachep7:
204 kmem_cache_destroy(gfs2_quotad_cachep);
205fail_cachep6:
206 kmem_cache_destroy(gfs2_rgrpd_cachep);
207fail_cachep5:
208 kmem_cache_destroy(gfs2_bufdata_cachep);
209fail_cachep4:
210 kmem_cache_destroy(gfs2_inode_cachep);
211fail_cachep3:
212 kmem_cache_destroy(gfs2_glock_aspace_cachep);
213fail_cachep2:
214 kmem_cache_destroy(gfs2_glock_cachep);
215fail_cachep1:
216 gfs2_glock_exit();
217fail_glock:
218 list_lru_destroy(&gfs2_qd_lru);
219fail_lru:
220 gfs2_sys_uninit();
221 return error;
222}
223
224/**
225 * exit_gfs2_fs - Unregister the file system
226 *
227 */
228
229static 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
256MODULE_DESCRIPTION("Global File System");
257MODULE_AUTHOR("Red Hat, Inc.");
258MODULE_LICENSE("GPL");
259
260module_init(init_gfs2_fs);
261module_exit(exit_gfs2_fs);
262