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#include <linux/slab.h>
 11#include <linux/spinlock.h>
 12#include <linux/completion.h>
 13#include <linux/buffer_head.h>
 14#include <linux/module.h>
 15#include <linux/init.h>
 16#include <linux/gfs2_ondisk.h>
 17#include <linux/rcupdate.h>
 18#include <linux/rculist_bl.h>
 19#include <linux/atomic.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
 31static struct shrinker qd_shrinker = {
 32	.shrink = gfs2_shrink_qd_memory,
 33	.seeks = DEFAULT_SEEKS,
 34};
 35
 36static void gfs2_init_inode_once(void *foo)
 37{
 38	struct gfs2_inode *ip = foo;
 39
 40	inode_init_once(&ip->i_inode);
 
 41	init_rwsem(&ip->i_rw_mutex);
 42	INIT_LIST_HEAD(&ip->i_trunc_list);
 43	ip->i_alloc = NULL;
 
 
 
 44	ip->i_hash_cache = NULL;
 
 45}
 46
 47static void gfs2_init_glock_once(void *foo)
 48{
 49	struct gfs2_glock *gl = foo;
 50
 51	INIT_HLIST_BL_NODE(&gl->gl_list);
 52	spin_lock_init(&gl->gl_spin);
 53	INIT_LIST_HEAD(&gl->gl_holders);
 54	INIT_LIST_HEAD(&gl->gl_lru);
 55	INIT_LIST_HEAD(&gl->gl_ail_list);
 56	atomic_set(&gl->gl_ail_count, 0);
 57	atomic_set(&gl->gl_revokes, 0);
 58}
 59
 60static void gfs2_init_gl_aspace_once(void *foo)
 61{
 62	struct gfs2_glock *gl = foo;
 63	struct address_space *mapping = (struct address_space *)(gl + 1);
 64
 65	gfs2_init_glock_once(gl);
 66	address_space_init_once(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
 82	error = gfs2_sys_init();
 83	if (error)
 84		return error;
 85
 
 
 
 
 86	error = gfs2_glock_init();
 87	if (error)
 88		goto fail;
 89
 90	error = -ENOMEM;
 91	gfs2_glock_cachep = kmem_cache_create("gfs2_glock",
 92					      sizeof(struct gfs2_glock),
 93					      0, 0,
 94					      gfs2_init_glock_once);
 95	if (!gfs2_glock_cachep)
 96		goto fail;
 97
 98	gfs2_glock_aspace_cachep = kmem_cache_create("gfs2_glock(aspace)",
 99					sizeof(struct gfs2_glock) +
100					sizeof(struct address_space),
101					0, 0, gfs2_init_gl_aspace_once);
102
103	if (!gfs2_glock_aspace_cachep)
104		goto fail;
105
106	gfs2_inode_cachep = kmem_cache_create("gfs2_inode",
107					      sizeof(struct gfs2_inode),
108					      0,  SLAB_RECLAIM_ACCOUNT|
109					          SLAB_MEM_SPREAD,
110					      gfs2_init_inode_once);
111	if (!gfs2_inode_cachep)
112		goto fail;
113
114	gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata",
115						sizeof(struct gfs2_bufdata),
116					        0, 0, NULL);
117	if (!gfs2_bufdata_cachep)
118		goto fail;
119
120	gfs2_rgrpd_cachep = kmem_cache_create("gfs2_rgrpd",
121					      sizeof(struct gfs2_rgrpd),
122					      0, 0, NULL);
123	if (!gfs2_rgrpd_cachep)
124		goto fail;
125
126	gfs2_quotad_cachep = kmem_cache_create("gfs2_quotad",
127					       sizeof(struct gfs2_quota_data),
128					       0, 0, NULL);
129	if (!gfs2_quotad_cachep)
130		goto fail;
131
132	register_shrinker(&qd_shrinker);
 
 
 
 
133
134	error = register_filesystem(&gfs2_fs_type);
135	if (error)
136		goto fail;
 
 
137
138	error = register_filesystem(&gfs2meta_fs_type);
139	if (error)
140		goto fail_unregister;
141
142	error = -ENOMEM;
143	gfs_recovery_wq = alloc_workqueue("gfs_recovery",
144					  WQ_MEM_RECLAIM | WQ_FREEZABLE, 0);
145	if (!gfs_recovery_wq)
146		goto fail_wq;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
147
148	gfs2_register_debugfs();
 
 
 
 
 
 
 
149
150	printk("GFS2 installed\n");
 
151
152	return 0;
153
154fail_wq:
155	unregister_filesystem(&gfs2meta_fs_type);
156fail_unregister:
157	unregister_filesystem(&gfs2_fs_type);
158fail:
159	unregister_shrinker(&qd_shrinker);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
160	gfs2_glock_exit();
161
162	if (gfs2_quotad_cachep)
163		kmem_cache_destroy(gfs2_quotad_cachep);
164
165	if (gfs2_rgrpd_cachep)
166		kmem_cache_destroy(gfs2_rgrpd_cachep);
167
168	if (gfs2_bufdata_cachep)
169		kmem_cache_destroy(gfs2_bufdata_cachep);
170
171	if (gfs2_inode_cachep)
172		kmem_cache_destroy(gfs2_inode_cachep);
173
174	if (gfs2_glock_aspace_cachep)
175		kmem_cache_destroy(gfs2_glock_aspace_cachep);
176
177	if (gfs2_glock_cachep)
178		kmem_cache_destroy(gfs2_glock_cachep);
179
180	gfs2_sys_uninit();
181	return error;
182}
183
184/**
185 * exit_gfs2_fs - Unregister the file system
186 *
187 */
188
189static void __exit exit_gfs2_fs(void)
190{
191	unregister_shrinker(&qd_shrinker);
192	gfs2_glock_exit();
193	gfs2_unregister_debugfs();
194	unregister_filesystem(&gfs2_fs_type);
195	unregister_filesystem(&gfs2meta_fs_type);
196	destroy_workqueue(gfs_recovery_wq);
 
 
 
197
198	rcu_barrier();
199
 
 
 
200	kmem_cache_destroy(gfs2_quotad_cachep);
201	kmem_cache_destroy(gfs2_rgrpd_cachep);
202	kmem_cache_destroy(gfs2_bufdata_cachep);
203	kmem_cache_destroy(gfs2_inode_cachep);
204	kmem_cache_destroy(gfs2_glock_aspace_cachep);
205	kmem_cache_destroy(gfs2_glock_cachep);
206
207	gfs2_sys_uninit();
208}
209
210MODULE_DESCRIPTION("Global File System");
211MODULE_AUTHOR("Red Hat, Inc.");
212MODULE_LICENSE("GPL");
213
214module_init(init_gfs2_fs);
215module_exit(exit_gfs2_fs);
216

  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