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_MEM_SPREAD|
115						  SLAB_ACCOUNT,
116					      gfs2_init_inode_once);
117	if (!gfs2_inode_cachep)
118		goto fail_cachep3;
119
120	gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata",
121						sizeof(struct gfs2_bufdata),
122					        0, 0, NULL);
123	if (!gfs2_bufdata_cachep)
124		goto fail_cachep4;
125
126	gfs2_rgrpd_cachep = kmem_cache_create("gfs2_rgrpd",
127					      sizeof(struct gfs2_rgrpd),
128					      0, 0, NULL);
129	if (!gfs2_rgrpd_cachep)
130		goto fail_cachep5;
131
132	gfs2_quotad_cachep = kmem_cache_create("gfs2_quotad",
133					       sizeof(struct gfs2_quota_data),
134					       0, SLAB_RECLAIM_ACCOUNT, NULL);
135	if (!gfs2_quotad_cachep)
136		goto fail_cachep6;
137
138	gfs2_qadata_cachep = kmem_cache_create("gfs2_qadata",
139					       sizeof(struct gfs2_qadata),
140					       0, 0, NULL);
141	if (!gfs2_qadata_cachep)
142		goto fail_cachep7;
143
144	gfs2_trans_cachep = kmem_cache_create("gfs2_trans",
145					       sizeof(struct gfs2_trans),
146					       0, 0, NULL);
147	if (!gfs2_trans_cachep)
148		goto fail_cachep8;
149
150	error = register_shrinker(&gfs2_qd_shrinker, "gfs2-qd");
 
 
 
 
151	if (error)
152		goto fail_shrinker;
153
154	error = -ENOMEM;
155	gfs_recovery_wq = alloc_workqueue("gfs_recovery",
156					  WQ_MEM_RECLAIM | WQ_FREEZABLE, 0);
157	if (!gfs_recovery_wq)
158		goto fail_wq1;
159
160	gfs2_control_wq = alloc_workqueue("gfs2_control",
161					  WQ_UNBOUND | WQ_FREEZABLE, 0);
162	if (!gfs2_control_wq)
163		goto fail_wq2;
164
165	gfs2_freeze_wq = alloc_workqueue("freeze_workqueue", 0, 0);
166
167	if (!gfs2_freeze_wq)
168		goto fail_wq3;
169
170	gfs2_page_pool = mempool_create_page_pool(64, 0);
171	if (!gfs2_page_pool)
172		goto fail_mempool;
173
174	gfs2_register_debugfs();
175	error = register_filesystem(&gfs2_fs_type);
176	if (error)
177		goto fail_fs1;
178
179	error = register_filesystem(&gfs2meta_fs_type);
180	if (error)
181		goto fail_fs2;
182
183
184	pr_info("GFS2 installed\n");
185
186	return 0;
187
188fail_fs2:
189	unregister_filesystem(&gfs2_fs_type);
190fail_fs1:
191	mempool_destroy(gfs2_page_pool);
192fail_mempool:
193	destroy_workqueue(gfs2_freeze_wq);
194fail_wq3:
195	destroy_workqueue(gfs2_control_wq);
196fail_wq2:
197	destroy_workqueue(gfs_recovery_wq);
198fail_wq1:
199	unregister_shrinker(&gfs2_qd_shrinker);
200fail_shrinker:
201	kmem_cache_destroy(gfs2_trans_cachep);
202fail_cachep8:
203	kmem_cache_destroy(gfs2_qadata_cachep);
204fail_cachep7:
205	kmem_cache_destroy(gfs2_quotad_cachep);
206fail_cachep6:
207	kmem_cache_destroy(gfs2_rgrpd_cachep);
208fail_cachep5:
209	kmem_cache_destroy(gfs2_bufdata_cachep);
210fail_cachep4:
211	kmem_cache_destroy(gfs2_inode_cachep);
212fail_cachep3:
213	kmem_cache_destroy(gfs2_glock_aspace_cachep);
214fail_cachep2:
215	kmem_cache_destroy(gfs2_glock_cachep);
216fail_cachep1:
217	gfs2_glock_exit();
218fail_glock:
219	list_lru_destroy(&gfs2_qd_lru);
220fail_lru:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
221	gfs2_sys_uninit();
222	return error;
223}
224
225/**
226 * exit_gfs2_fs - Unregister the file system
227 *
228 */
229
230static void __exit exit_gfs2_fs(void)
231{
232	unregister_shrinker(&gfs2_qd_shrinker);
233	gfs2_glock_exit();
234	gfs2_unregister_debugfs();
235	unregister_filesystem(&gfs2_fs_type);
236	unregister_filesystem(&gfs2meta_fs_type);
237	destroy_workqueue(gfs_recovery_wq);
238	destroy_workqueue(gfs2_control_wq);
239	destroy_workqueue(gfs2_freeze_wq);
240	list_lru_destroy(&gfs2_qd_lru);
241
242	rcu_barrier();
243
244	mempool_destroy(gfs2_page_pool);
245	kmem_cache_destroy(gfs2_trans_cachep);
246	kmem_cache_destroy(gfs2_qadata_cachep);
247	kmem_cache_destroy(gfs2_quotad_cachep);
248	kmem_cache_destroy(gfs2_rgrpd_cachep);
249	kmem_cache_destroy(gfs2_bufdata_cachep);
250	kmem_cache_destroy(gfs2_inode_cachep);
251	kmem_cache_destroy(gfs2_glock_aspace_cachep);
252	kmem_cache_destroy(gfs2_glock_cachep);
253
254	gfs2_sys_uninit();
255}
256
257MODULE_DESCRIPTION("Global File System");
258MODULE_AUTHOR("Red Hat, Inc.");
259MODULE_LICENSE("GPL");
260
261module_init(init_gfs2_fs);
262module_exit(exit_gfs2_fs);
263

 
  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#include <linux/mempool.h>
 21
 22#include "gfs2.h"
 23#include "incore.h"
 24#include "super.h"
 25#include "sys.h"
 26#include "util.h"
 27#include "glock.h"
 28#include "quota.h"
 29#include "recovery.h"
 30#include "dir.h"
 
 31
 32struct workqueue_struct *gfs2_control_wq;
 33
 34static struct shrinker qd_shrinker = {
 35	.shrink = gfs2_shrink_qd_memory,
 36	.seeks = DEFAULT_SEEKS,
 37};
 38
 39static void gfs2_init_inode_once(void *foo)
 40{
 41	struct gfs2_inode *ip = foo;
 42
 43	inode_init_once(&ip->i_inode);
 
 44	init_rwsem(&ip->i_rw_mutex);
 45	INIT_LIST_HEAD(&ip->i_trunc_list);
 46	ip->i_qadata = NULL;
 47	ip->i_res = NULL;
 
 
 48	ip->i_hash_cache = NULL;
 
 49}
 50
 51static void gfs2_init_glock_once(void *foo)
 52{
 53	struct gfs2_glock *gl = foo;
 54
 55	INIT_HLIST_BL_NODE(&gl->gl_list);
 56	spin_lock_init(&gl->gl_spin);
 57	INIT_LIST_HEAD(&gl->gl_holders);
 58	INIT_LIST_HEAD(&gl->gl_lru);
 59	INIT_LIST_HEAD(&gl->gl_ail_list);
 60	atomic_set(&gl->gl_ail_count, 0);
 61	atomic_set(&gl->gl_revokes, 0);
 62}
 63
 64static void gfs2_init_gl_aspace_once(void *foo)
 65{
 66	struct gfs2_glock *gl = foo;
 67	struct address_space *mapping = (struct address_space *)(gl + 1);
 68
 69	gfs2_init_glock_once(gl);
 70	address_space_init_once(mapping);
 71}
 72
 73/**
 74 * init_gfs2_fs - Register GFS2 as a filesystem
 75 *
 76 * Returns: 0 on success, error code on failure
 77 */
 78
 79static int __init init_gfs2_fs(void)
 80{
 81	int error;
 82
 83	gfs2_str2qstr(&gfs2_qdot, ".");
 84	gfs2_str2qstr(&gfs2_qdotdot, "..");
 
 85
 86	error = gfs2_sys_init();
 87	if (error)
 88		return error;
 89
 
 
 
 
 90	error = gfs2_glock_init();
 91	if (error)
 92		goto fail;
 93
 94	error = -ENOMEM;
 95	gfs2_glock_cachep = kmem_cache_create("gfs2_glock",
 96					      sizeof(struct gfs2_glock),
 97					      0, 0,
 98					      gfs2_init_glock_once);
 99	if (!gfs2_glock_cachep)
100		goto fail;
101
102	gfs2_glock_aspace_cachep = kmem_cache_create("gfs2_glock(aspace)",
103					sizeof(struct gfs2_glock) +
104					sizeof(struct address_space),
105					0, 0, gfs2_init_gl_aspace_once);
106
107	if (!gfs2_glock_aspace_cachep)
108		goto fail;
109
110	gfs2_inode_cachep = kmem_cache_create("gfs2_inode",
111					      sizeof(struct gfs2_inode),
112					      0,  SLAB_RECLAIM_ACCOUNT|
113					          SLAB_MEM_SPREAD,
 
114					      gfs2_init_inode_once);
115	if (!gfs2_inode_cachep)
116		goto fail;
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;
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;
129
130	gfs2_quotad_cachep = kmem_cache_create("gfs2_quotad",
131					       sizeof(struct gfs2_quota_data),
132					       0, 0, NULL);
133	if (!gfs2_quotad_cachep)
134		goto fail;
135
136	gfs2_rsrv_cachep = kmem_cache_create("gfs2_mblk",
137					     sizeof(struct gfs2_blkreserv),
138					       0, 0, NULL);
139	if (!gfs2_rsrv_cachep)
140		goto fail;
141
142	register_shrinker(&qd_shrinker);
 
 
 
 
143
144	error = register_filesystem(&gfs2_fs_type);
145	if (error)
146		goto fail;
147
148	error = register_filesystem(&gfs2meta_fs_type);
149	if (error)
150		goto fail_unregister;
151
152	error = -ENOMEM;
153	gfs_recovery_wq = alloc_workqueue("gfs_recovery",
154					  WQ_MEM_RECLAIM | WQ_FREEZABLE, 0);
155	if (!gfs_recovery_wq)
156		goto fail_wq;
157
158	gfs2_control_wq = alloc_workqueue("gfs2_control",
159			       WQ_NON_REENTRANT | WQ_UNBOUND | WQ_FREEZABLE, 0);
160	if (!gfs2_control_wq)
161		goto fail_recovery;
 
 
 
 
 
162
163	gfs2_page_pool = mempool_create_page_pool(64, 0);
164	if (!gfs2_page_pool)
165		goto fail_control;
166
167	gfs2_register_debugfs();
 
 
 
168
169	printk("GFS2 installed\n");
 
 
 
 
 
170
171	return 0;
172
173fail_control:
 
 
 
 
 
 
174	destroy_workqueue(gfs2_control_wq);
175fail_recovery:
176	destroy_workqueue(gfs_recovery_wq);
177fail_wq:
178	unregister_filesystem(&gfs2meta_fs_type);
179fail_unregister:
180	unregister_filesystem(&gfs2_fs_type);
181fail:
182	unregister_shrinker(&qd_shrinker);
 
 
 
 
 
 
 
 
 
 
 
 
 
183	gfs2_glock_exit();
184
185	if (gfs2_rsrv_cachep)
186		kmem_cache_destroy(gfs2_rsrv_cachep);
187
188	if (gfs2_quotad_cachep)
189		kmem_cache_destroy(gfs2_quotad_cachep);
190
191	if (gfs2_rgrpd_cachep)
192		kmem_cache_destroy(gfs2_rgrpd_cachep);
193
194	if (gfs2_bufdata_cachep)
195		kmem_cache_destroy(gfs2_bufdata_cachep);
196
197	if (gfs2_inode_cachep)
198		kmem_cache_destroy(gfs2_inode_cachep);
199
200	if (gfs2_glock_aspace_cachep)
201		kmem_cache_destroy(gfs2_glock_aspace_cachep);
202
203	if (gfs2_glock_cachep)
204		kmem_cache_destroy(gfs2_glock_cachep);
205
206	gfs2_sys_uninit();
207	return error;
208}
209
210/**
211 * exit_gfs2_fs - Unregister the file system
212 *
213 */
214
215static void __exit exit_gfs2_fs(void)
216{
217	unregister_shrinker(&qd_shrinker);
218	gfs2_glock_exit();
219	gfs2_unregister_debugfs();
220	unregister_filesystem(&gfs2_fs_type);
221	unregister_filesystem(&gfs2meta_fs_type);
222	destroy_workqueue(gfs_recovery_wq);
223	destroy_workqueue(gfs2_control_wq);
 
 
224
225	rcu_barrier();
226
227	mempool_destroy(gfs2_page_pool);
228	kmem_cache_destroy(gfs2_rsrv_cachep);
 
229	kmem_cache_destroy(gfs2_quotad_cachep);
230	kmem_cache_destroy(gfs2_rgrpd_cachep);
231	kmem_cache_destroy(gfs2_bufdata_cachep);
232	kmem_cache_destroy(gfs2_inode_cachep);
233	kmem_cache_destroy(gfs2_glock_aspace_cachep);
234	kmem_cache_destroy(gfs2_glock_cachep);
235
236	gfs2_sys_uninit();
237}
238
239MODULE_DESCRIPTION("Global File System");
240MODULE_AUTHOR("Red Hat, Inc.");
241MODULE_LICENSE("GPL");
242
243module_init(init_gfs2_fs);
244module_exit(exit_gfs2_fs);
245