main.c

  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