2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3 * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
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.
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/lm_interface.h>
18 #include <asm/atomic.h>
22 #include "ops_fstype.h"
27 static void gfs2_init_inode_once(void *foo, struct kmem_cache *cachep, unsigned long flags)
29 struct gfs2_inode *ip = foo;
30 if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
31 SLAB_CTOR_CONSTRUCTOR) {
32 inode_init_once(&ip->i_inode);
33 spin_lock_init(&ip->i_spin);
34 init_rwsem(&ip->i_rw_mutex);
35 memset(ip->i_cache, 0, sizeof(ip->i_cache));
39 static void gfs2_init_glock_once(void *foo, struct kmem_cache *cachep, unsigned long flags)
41 struct gfs2_glock *gl = foo;
42 if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
43 SLAB_CTOR_CONSTRUCTOR) {
44 INIT_HLIST_NODE(&gl->gl_list);
45 spin_lock_init(&gl->gl_spin);
46 INIT_LIST_HEAD(&gl->gl_holders);
47 INIT_LIST_HEAD(&gl->gl_waiters1);
48 INIT_LIST_HEAD(&gl->gl_waiters2);
49 INIT_LIST_HEAD(&gl->gl_waiters3);
51 atomic_set(&gl->gl_lvb_count, 0);
52 INIT_LIST_HEAD(&gl->gl_reclaim);
53 INIT_LIST_HEAD(&gl->gl_ail_list);
54 atomic_set(&gl->gl_ail_count, 0);
59 * init_gfs2_fs - Register GFS2 as a filesystem
61 * Returns: 0 on success, error code on failure
64 static int __init init_gfs2_fs(void)
68 error = gfs2_sys_init();
72 error = gfs2_glock_init();
77 gfs2_glock_cachep = kmem_cache_create("gfs2_glock",
78 sizeof(struct gfs2_glock),
80 gfs2_init_glock_once, NULL);
81 if (!gfs2_glock_cachep)
84 gfs2_inode_cachep = kmem_cache_create("gfs2_inode",
85 sizeof(struct gfs2_inode),
86 0, SLAB_RECLAIM_ACCOUNT|
88 gfs2_init_inode_once, NULL);
89 if (!gfs2_inode_cachep)
92 gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata",
93 sizeof(struct gfs2_bufdata),
95 if (!gfs2_bufdata_cachep)
98 error = register_filesystem(&gfs2_fs_type);
102 error = register_filesystem(&gfs2meta_fs_type);
104 goto fail_unregister;
106 printk("GFS2 (built %s %s) installed\n", __DATE__, __TIME__);
111 unregister_filesystem(&gfs2_fs_type);
113 if (gfs2_bufdata_cachep)
114 kmem_cache_destroy(gfs2_bufdata_cachep);
116 if (gfs2_inode_cachep)
117 kmem_cache_destroy(gfs2_inode_cachep);
119 if (gfs2_glock_cachep)
120 kmem_cache_destroy(gfs2_glock_cachep);
127 * exit_gfs2_fs - Unregister the file system
131 static void __exit exit_gfs2_fs(void)
133 unregister_filesystem(&gfs2_fs_type);
134 unregister_filesystem(&gfs2meta_fs_type);
136 kmem_cache_destroy(gfs2_bufdata_cachep);
137 kmem_cache_destroy(gfs2_inode_cachep);
138 kmem_cache_destroy(gfs2_glock_cachep);
143 MODULE_DESCRIPTION("Global File System");
144 MODULE_AUTHOR("Red Hat, Inc.");
145 MODULE_LICENSE("GPL");
147 module_init(init_gfs2_fs);
148 module_exit(exit_gfs2_fs);