blob: d5d4e68b88070430e667aec80d1bb91b6e571c28 [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 Lametere18b8902006-12-06 20:33:20 -080027static void gfs2_init_inode_once(void *foo, struct kmem_cache *cachep, unsigned long flags)
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);
32 spin_lock_init(&ip->i_spin);
33 init_rwsem(&ip->i_rw_mutex);
34 memset(ip->i_cache, 0, sizeof(ip->i_cache));
Steven Whitehouse320dd102006-05-18 16:25:27 -040035}
36
Christoph Lametere18b8902006-12-06 20:33:20 -080037static void gfs2_init_glock_once(void *foo, struct kmem_cache *cachep, unsigned long flags)
Steven Whitehouseec45d9f2006-08-30 10:36:52 -040038{
39 struct gfs2_glock *gl = foo;
Christoph Lametera35afb82007-05-16 22:10:57 -070040
41 INIT_HLIST_NODE(&gl->gl_list);
42 spin_lock_init(&gl->gl_spin);
43 INIT_LIST_HEAD(&gl->gl_holders);
44 INIT_LIST_HEAD(&gl->gl_waiters1);
45 INIT_LIST_HEAD(&gl->gl_waiters3);
46 gl->gl_lvb = NULL;
47 atomic_set(&gl->gl_lvb_count, 0);
48 INIT_LIST_HEAD(&gl->gl_reclaim);
49 INIT_LIST_HEAD(&gl->gl_ail_list);
50 atomic_set(&gl->gl_ail_count, 0);
Steven Whitehouseec45d9f2006-08-30 10:36:52 -040051}
52
David Teiglandb3b94fa2006-01-16 16:50:04 +000053/**
54 * init_gfs2_fs - Register GFS2 as a filesystem
55 *
56 * Returns: 0 on success, error code on failure
57 */
58
59static int __init init_gfs2_fs(void)
60{
61 int error;
62
David Teiglandb3b94fa2006-01-16 16:50:04 +000063 error = gfs2_sys_init();
64 if (error)
65 return error;
66
Steven Whitehouse85d1da62006-09-07 14:40:21 -040067 error = gfs2_glock_init();
68 if (error)
69 goto fail;
David Teiglandb3b94fa2006-01-16 16:50:04 +000070
Steven Whitehouse85d1da62006-09-07 14:40:21 -040071 error = -ENOMEM;
David Teiglandb3b94fa2006-01-16 16:50:04 +000072 gfs2_glock_cachep = kmem_cache_create("gfs2_glock",
73 sizeof(struct gfs2_glock),
Steven Whitehouse907b9bc2006-09-25 09:26:04 -040074 0, 0,
Paul Mundt20c2df82007-07-20 10:11:58 +090075 gfs2_init_glock_once);
David Teiglandb3b94fa2006-01-16 16:50:04 +000076 if (!gfs2_glock_cachep)
77 goto fail;
78
79 gfs2_inode_cachep = kmem_cache_create("gfs2_inode",
80 sizeof(struct gfs2_inode),
Alexey Dobriyaneb1dc332006-10-28 03:03:48 +040081 0, SLAB_RECLAIM_ACCOUNT|
82 SLAB_MEM_SPREAD,
Paul Mundt20c2df82007-07-20 10:11:58 +090083 gfs2_init_inode_once);
David Teiglandb3b94fa2006-01-16 16:50:04 +000084 if (!gfs2_inode_cachep)
85 goto fail;
86
87 gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata",
88 sizeof(struct gfs2_bufdata),
Paul Mundt20c2df82007-07-20 10:11:58 +090089 0, 0, NULL);
David Teiglandb3b94fa2006-01-16 16:50:04 +000090 if (!gfs2_bufdata_cachep)
91 goto fail;
92
93 error = register_filesystem(&gfs2_fs_type);
94 if (error)
95 goto fail;
96
Steven Whitehouse419c93e2006-03-02 16:33:41 -050097 error = register_filesystem(&gfs2meta_fs_type);
98 if (error)
99 goto fail_unregister;
100
Robert Peterson7c52b162007-03-16 10:26:37 +0000101 gfs2_register_debugfs();
102
David Teiglandb3b94fa2006-01-16 16:50:04 +0000103 printk("GFS2 (built %s %s) installed\n", __DATE__, __TIME__);
104
105 return 0;
106
Steven Whitehouse419c93e2006-03-02 16:33:41 -0500107fail_unregister:
108 unregister_filesystem(&gfs2_fs_type);
109fail:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000110 if (gfs2_bufdata_cachep)
111 kmem_cache_destroy(gfs2_bufdata_cachep);
112
113 if (gfs2_inode_cachep)
114 kmem_cache_destroy(gfs2_inode_cachep);
115
116 if (gfs2_glock_cachep)
117 kmem_cache_destroy(gfs2_glock_cachep);
118
119 gfs2_sys_uninit();
120 return error;
121}
122
123/**
124 * exit_gfs2_fs - Unregister the file system
125 *
126 */
127
128static void __exit exit_gfs2_fs(void)
129{
Robert Peterson7c52b162007-03-16 10:26:37 +0000130 gfs2_unregister_debugfs();
David Teiglandb3b94fa2006-01-16 16:50:04 +0000131 unregister_filesystem(&gfs2_fs_type);
Steven Whitehouse419c93e2006-03-02 16:33:41 -0500132 unregister_filesystem(&gfs2meta_fs_type);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000133
134 kmem_cache_destroy(gfs2_bufdata_cachep);
135 kmem_cache_destroy(gfs2_inode_cachep);
136 kmem_cache_destroy(gfs2_glock_cachep);
137
138 gfs2_sys_uninit();
139}
140
141MODULE_DESCRIPTION("Global File System");
142MODULE_AUTHOR("Red Hat, Inc.");
143MODULE_LICENSE("GPL");
144
145module_init(init_gfs2_fs);
146module_exit(exit_gfs2_fs);
147