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David Teiglandb3b94fa2006-01-16 16:50:04 +00001/*
2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
Steven Whitehouse3a8a9a12006-05-18 15:09:15 -04003 * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
David Teiglandb3b94fa2006-01-16 16:50:04 +00004 *
5 * This copyrighted material is made available to anyone wishing to use,
6 * modify, copy, or redistribute it subject to the terms and conditions
Steven Whitehousee9fc2aa2006-09-01 11:05:15 -04007 * of the GNU General Public License version 2.
David Teiglandb3b94fa2006-01-16 16:50:04 +00008 */
9
David Teiglandb3b94fa2006-01-16 16:50:04 +000010#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>
Steven Whitehouse5c676f62006-02-27 17:23:27 -050016#include <linux/gfs2_ondisk.h>
Steven Whitehouseec45d9f2006-08-30 10:36:52 -040017#include <asm/atomic.h>
Steven Whitehousefe64d512009-05-19 10:01:18 +010018#include <linux/slow-work.h>
David Teiglandb3b94fa2006-01-16 16:50:04 +000019
20#include "gfs2.h"
Steven Whitehouse5c676f62006-02-27 17:23:27 -050021#include "incore.h"
Steven Whitehouseb2760582008-10-14 16:05:55 +010022#include "super.h"
David Teiglandb3b94fa2006-01-16 16:50:04 +000023#include "sys.h"
Steven Whitehouse5c676f62006-02-27 17:23:27 -050024#include "util.h"
Steven Whitehouse85d1da62006-09-07 14:40:21 -040025#include "glock.h"
Abhijith Das0a7ab792009-01-07 16:03:37 -060026#include "quota.h"
27
28static struct shrinker qd_shrinker = {
29 .shrink = gfs2_shrink_qd_memory,
30 .seeks = DEFAULT_SEEKS,
31};
David Teiglandb3b94fa2006-01-16 16:50:04 +000032
Alexey Dobriyan51cc5062008-07-25 19:45:34 -070033static void gfs2_init_inode_once(void *foo)
Steven Whitehouse320dd102006-05-18 16:25:27 -040034{
35 struct gfs2_inode *ip = foo;
Christoph Lametera35afb82007-05-16 22:10:57 -070036
37 inode_init_once(&ip->i_inode);
Christoph Lametera35afb82007-05-16 22:10:57 -070038 init_rwsem(&ip->i_rw_mutex);
Steven Whitehouse813e0c42008-11-18 13:38:48 +000039 INIT_LIST_HEAD(&ip->i_trunc_list);
Steven Whitehouse6dbd8222008-01-10 15:18:55 +000040 ip->i_alloc = NULL;
Steven Whitehouse320dd102006-05-18 16:25:27 -040041}
42
Alexey Dobriyan51cc5062008-07-25 19:45:34 -070043static void gfs2_init_glock_once(void *foo)
Steven Whitehouseec45d9f2006-08-30 10:36:52 -040044{
45 struct gfs2_glock *gl = foo;
Christoph Lametera35afb82007-05-16 22:10:57 -070046
47 INIT_HLIST_NODE(&gl->gl_list);
48 spin_lock_init(&gl->gl_spin);
49 INIT_LIST_HEAD(&gl->gl_holders);
Steven Whitehouse97cc1022008-11-20 13:39:47 +000050 INIT_LIST_HEAD(&gl->gl_lru);
Christoph Lametera35afb82007-05-16 22:10:57 -070051 INIT_LIST_HEAD(&gl->gl_ail_list);
52 atomic_set(&gl->gl_ail_count, 0);
Steven Whitehouseec45d9f2006-08-30 10:36:52 -040053}
54
David Teiglandb3b94fa2006-01-16 16:50:04 +000055/**
56 * init_gfs2_fs - Register GFS2 as a filesystem
57 *
58 * Returns: 0 on success, error code on failure
59 */
60
61static int __init init_gfs2_fs(void)
62{
63 int error;
64
David Teiglandb3b94fa2006-01-16 16:50:04 +000065 error = gfs2_sys_init();
66 if (error)
67 return error;
68
Steven Whitehouse85d1da62006-09-07 14:40:21 -040069 error = gfs2_glock_init();
70 if (error)
71 goto fail;
David Teiglandb3b94fa2006-01-16 16:50:04 +000072
Steven Whitehouse85d1da62006-09-07 14:40:21 -040073 error = -ENOMEM;
David Teiglandb3b94fa2006-01-16 16:50:04 +000074 gfs2_glock_cachep = kmem_cache_create("gfs2_glock",
75 sizeof(struct gfs2_glock),
Steven Whitehouse907b9bc2006-09-25 09:26:04 -040076 0, 0,
Paul Mundt20c2df82007-07-20 10:11:58 +090077 gfs2_init_glock_once);
David Teiglandb3b94fa2006-01-16 16:50:04 +000078 if (!gfs2_glock_cachep)
79 goto fail;
80
81 gfs2_inode_cachep = kmem_cache_create("gfs2_inode",
82 sizeof(struct gfs2_inode),
Alexey Dobriyaneb1dc332006-10-28 03:03:48 +040083 0, SLAB_RECLAIM_ACCOUNT|
84 SLAB_MEM_SPREAD,
Paul Mundt20c2df82007-07-20 10:11:58 +090085 gfs2_init_inode_once);
David Teiglandb3b94fa2006-01-16 16:50:04 +000086 if (!gfs2_inode_cachep)
87 goto fail;
88
89 gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata",
90 sizeof(struct gfs2_bufdata),
Paul Mundt20c2df82007-07-20 10:11:58 +090091 0, 0, NULL);
David Teiglandb3b94fa2006-01-16 16:50:04 +000092 if (!gfs2_bufdata_cachep)
93 goto fail;
94
Bob Peterson6bdd9be2008-01-28 17:20:26 -060095 gfs2_rgrpd_cachep = kmem_cache_create("gfs2_rgrpd",
96 sizeof(struct gfs2_rgrpd),
97 0, 0, NULL);
98 if (!gfs2_rgrpd_cachep)
99 goto fail;
100
Steven Whitehouse37b2c832008-11-17 14:25:37 +0000101 gfs2_quotad_cachep = kmem_cache_create("gfs2_quotad",
102 sizeof(struct gfs2_quota_data),
103 0, 0, NULL);
104 if (!gfs2_quotad_cachep)
105 goto fail;
106
Abhijith Das0a7ab792009-01-07 16:03:37 -0600107 register_shrinker(&qd_shrinker);
108
David Teiglandb3b94fa2006-01-16 16:50:04 +0000109 error = register_filesystem(&gfs2_fs_type);
110 if (error)
111 goto fail;
112
Steven Whitehouse419c93e2006-03-02 16:33:41 -0500113 error = register_filesystem(&gfs2meta_fs_type);
114 if (error)
115 goto fail_unregister;
116
Steven Whitehousefe64d512009-05-19 10:01:18 +0100117 error = slow_work_register_user();
118 if (error)
119 goto fail_slow;
120
Robert Peterson7c52b162007-03-16 10:26:37 +0000121 gfs2_register_debugfs();
122
David Teiglandb3b94fa2006-01-16 16:50:04 +0000123 printk("GFS2 (built %s %s) installed\n", __DATE__, __TIME__);
124
125 return 0;
126
Steven Whitehousefe64d512009-05-19 10:01:18 +0100127fail_slow:
128 unregister_filesystem(&gfs2meta_fs_type);
Steven Whitehouse419c93e2006-03-02 16:33:41 -0500129fail_unregister:
130 unregister_filesystem(&gfs2_fs_type);
131fail:
Abhijith Das0a7ab792009-01-07 16:03:37 -0600132 unregister_shrinker(&qd_shrinker);
Steven Whitehouse8fbbfd22007-08-01 13:57:10 +0100133 gfs2_glock_exit();
134
Steven Whitehouse37b2c832008-11-17 14:25:37 +0000135 if (gfs2_quotad_cachep)
136 kmem_cache_destroy(gfs2_quotad_cachep);
137
Bob Peterson6bdd9be2008-01-28 17:20:26 -0600138 if (gfs2_rgrpd_cachep)
139 kmem_cache_destroy(gfs2_rgrpd_cachep);
140
David Teiglandb3b94fa2006-01-16 16:50:04 +0000141 if (gfs2_bufdata_cachep)
142 kmem_cache_destroy(gfs2_bufdata_cachep);
143
144 if (gfs2_inode_cachep)
145 kmem_cache_destroy(gfs2_inode_cachep);
146
147 if (gfs2_glock_cachep)
148 kmem_cache_destroy(gfs2_glock_cachep);
149
150 gfs2_sys_uninit();
151 return error;
152}
153
154/**
155 * exit_gfs2_fs - Unregister the file system
156 *
157 */
158
159static void __exit exit_gfs2_fs(void)
160{
Abhijith Das0a7ab792009-01-07 16:03:37 -0600161 unregister_shrinker(&qd_shrinker);
Steven Whitehouse8fbbfd22007-08-01 13:57:10 +0100162 gfs2_glock_exit();
Robert Peterson7c52b162007-03-16 10:26:37 +0000163 gfs2_unregister_debugfs();
David Teiglandb3b94fa2006-01-16 16:50:04 +0000164 unregister_filesystem(&gfs2_fs_type);
Steven Whitehouse419c93e2006-03-02 16:33:41 -0500165 unregister_filesystem(&gfs2meta_fs_type);
Steven Whitehousefe64d512009-05-19 10:01:18 +0100166 slow_work_unregister_user();
David Teiglandb3b94fa2006-01-16 16:50:04 +0000167
Steven Whitehouse37b2c832008-11-17 14:25:37 +0000168 kmem_cache_destroy(gfs2_quotad_cachep);
Bob Peterson6bdd9be2008-01-28 17:20:26 -0600169 kmem_cache_destroy(gfs2_rgrpd_cachep);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000170 kmem_cache_destroy(gfs2_bufdata_cachep);
171 kmem_cache_destroy(gfs2_inode_cachep);
172 kmem_cache_destroy(gfs2_glock_cachep);
173
174 gfs2_sys_uninit();
175}
176
177MODULE_DESCRIPTION("Global File System");
178MODULE_AUTHOR("Red Hat, Inc.");
179MODULE_LICENSE("GPL");
180
181module_init(init_gfs2_fs);
182module_exit(exit_gfs2_fs);
183