blob: 9c7765c12d62eeac6443d853cf6bde4584019690 [file] [log] [blame]
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>
Fabio Massimo Di Nitto7d308592006-09-19 07:56:29 +020017#include <linux/lm_interface.h>
Steven Whitehouseec45d9f2006-08-30 10:36:52 -040018#include <asm/atomic.h>
David Teiglandb3b94fa2006-01-16 16:50:04 +000019
20#include "gfs2.h"
Steven Whitehouse5c676f62006-02-27 17:23:27 -050021#include "incore.h"
David Teiglandb3b94fa2006-01-16 16:50:04 +000022#include "ops_fstype.h"
23#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"
David Teiglandb3b94fa2006-01-16 16:50:04 +000026
Christoph Lameter4ba9b9d2007-10-16 23:25:51 -070027static void gfs2_init_inode_once(struct kmem_cache *cachep, void *foo)
Steven Whitehouse320dd102006-05-18 16:25:27 -040028{
29 struct gfs2_inode *ip = foo;
Christoph Lametera35afb82007-05-16 22:10:57 -070030
31 inode_init_once(&ip->i_inode);
Christoph Lametera35afb82007-05-16 22:10:57 -070032 init_rwsem(&ip->i_rw_mutex);
Steven Whitehouse6dbd8222008-01-10 15:18:55 +000033 ip->i_alloc = NULL;
Steven Whitehouse320dd102006-05-18 16:25:27 -040034}
35
Christoph Lameter4ba9b9d2007-10-16 23:25:51 -070036static void gfs2_init_glock_once(struct kmem_cache *cachep, void *foo)
Steven Whitehouseec45d9f2006-08-30 10:36:52 -040037{
38 struct gfs2_glock *gl = foo;
Christoph Lametera35afb82007-05-16 22:10:57 -070039
40 INIT_HLIST_NODE(&gl->gl_list);
41 spin_lock_init(&gl->gl_spin);
42 INIT_LIST_HEAD(&gl->gl_holders);
43 INIT_LIST_HEAD(&gl->gl_waiters1);
44 INIT_LIST_HEAD(&gl->gl_waiters3);
45 gl->gl_lvb = NULL;
46 atomic_set(&gl->gl_lvb_count, 0);
47 INIT_LIST_HEAD(&gl->gl_reclaim);
48 INIT_LIST_HEAD(&gl->gl_ail_list);
49 atomic_set(&gl->gl_ail_count, 0);
Steven Whitehouseec45d9f2006-08-30 10:36:52 -040050}
51
David Teiglandb3b94fa2006-01-16 16:50:04 +000052/**
53 * init_gfs2_fs - Register GFS2 as a filesystem
54 *
55 * Returns: 0 on success, error code on failure
56 */
57
58static int __init init_gfs2_fs(void)
59{
60 int error;
61
David Teiglandb3b94fa2006-01-16 16:50:04 +000062 error = gfs2_sys_init();
63 if (error)
64 return error;
65
Steven Whitehouse85d1da62006-09-07 14:40:21 -040066 error = gfs2_glock_init();
67 if (error)
68 goto fail;
David Teiglandb3b94fa2006-01-16 16:50:04 +000069
Steven Whitehouse85d1da62006-09-07 14:40:21 -040070 error = -ENOMEM;
David Teiglandb3b94fa2006-01-16 16:50:04 +000071 gfs2_glock_cachep = kmem_cache_create("gfs2_glock",
72 sizeof(struct gfs2_glock),
Steven Whitehouse907b9bc2006-09-25 09:26:04 -040073 0, 0,
Paul Mundt20c2df82007-07-20 10:11:58 +090074 gfs2_init_glock_once);
David Teiglandb3b94fa2006-01-16 16:50:04 +000075 if (!gfs2_glock_cachep)
76 goto fail;
77
78 gfs2_inode_cachep = kmem_cache_create("gfs2_inode",
79 sizeof(struct gfs2_inode),
Alexey Dobriyaneb1dc332006-10-28 03:03:48 +040080 0, SLAB_RECLAIM_ACCOUNT|
81 SLAB_MEM_SPREAD,
Paul Mundt20c2df82007-07-20 10:11:58 +090082 gfs2_init_inode_once);
David Teiglandb3b94fa2006-01-16 16:50:04 +000083 if (!gfs2_inode_cachep)
84 goto fail;
85
86 gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata",
87 sizeof(struct gfs2_bufdata),
Paul Mundt20c2df82007-07-20 10:11:58 +090088 0, 0, NULL);
David Teiglandb3b94fa2006-01-16 16:50:04 +000089 if (!gfs2_bufdata_cachep)
90 goto fail;
91
92 error = register_filesystem(&gfs2_fs_type);
93 if (error)
94 goto fail;
95
Steven Whitehouse419c93e2006-03-02 16:33:41 -050096 error = register_filesystem(&gfs2meta_fs_type);
97 if (error)
98 goto fail_unregister;
99
Robert Peterson7c52b162007-03-16 10:26:37 +0000100 gfs2_register_debugfs();
101
David Teiglandb3b94fa2006-01-16 16:50:04 +0000102 printk("GFS2 (built %s %s) installed\n", __DATE__, __TIME__);
103
104 return 0;
105
Steven Whitehouse419c93e2006-03-02 16:33:41 -0500106fail_unregister:
107 unregister_filesystem(&gfs2_fs_type);
108fail:
Steven Whitehouse8fbbfd22007-08-01 13:57:10 +0100109 gfs2_glock_exit();
110
David Teiglandb3b94fa2006-01-16 16:50:04 +0000111 if (gfs2_bufdata_cachep)
112 kmem_cache_destroy(gfs2_bufdata_cachep);
113
114 if (gfs2_inode_cachep)
115 kmem_cache_destroy(gfs2_inode_cachep);
116
117 if (gfs2_glock_cachep)
118 kmem_cache_destroy(gfs2_glock_cachep);
119
120 gfs2_sys_uninit();
121 return error;
122}
123
124/**
125 * exit_gfs2_fs - Unregister the file system
126 *
127 */
128
129static void __exit exit_gfs2_fs(void)
130{
Steven Whitehouse8fbbfd22007-08-01 13:57:10 +0100131 gfs2_glock_exit();
Robert Peterson7c52b162007-03-16 10:26:37 +0000132 gfs2_unregister_debugfs();
David Teiglandb3b94fa2006-01-16 16:50:04 +0000133 unregister_filesystem(&gfs2_fs_type);
Steven Whitehouse419c93e2006-03-02 16:33:41 -0500134 unregister_filesystem(&gfs2meta_fs_type);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000135
136 kmem_cache_destroy(gfs2_bufdata_cachep);
137 kmem_cache_destroy(gfs2_inode_cachep);
138 kmem_cache_destroy(gfs2_glock_cachep);
139
140 gfs2_sys_uninit();
141}
142
143MODULE_DESCRIPTION("Global File System");
144MODULE_AUTHOR("Red Hat, Inc.");
145MODULE_LICENSE("GPL");
146
147module_init(init_gfs2_fs);
148module_exit(exit_gfs2_fs);
149