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	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_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
76static 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
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
263