[libata] sata_sx4: named constant cleanup
[pohmelfs.git] / fs / gfs2 / main.c
blob787a0edef100504727184274622d21c48385af93
1 /*
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.
8 */
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>
20 #include "gfs2.h"
21 #include "incore.h"
22 #include "ops_fstype.h"
23 #include "sys.h"
24 #include "util.h"
25 #include "glock.h"
27 static void gfs2_init_inode_once(void *foo, struct kmem_cache *cachep, unsigned long flags)
29 struct gfs2_inode *ip = foo;
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));
37 static void gfs2_init_glock_once(void *foo, struct kmem_cache *cachep, unsigned long flags)
39 struct gfs2_glock *gl = foo;
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);
53 /**
54 * init_gfs2_fs - Register GFS2 as a filesystem
56 * Returns: 0 on success, error code on failure
59 static int __init init_gfs2_fs(void)
61 int error;
63 error = gfs2_sys_init();
64 if (error)
65 return error;
67 error = gfs2_glock_init();
68 if (error)
69 goto fail;
71 error = -ENOMEM;
72 gfs2_glock_cachep = kmem_cache_create("gfs2_glock",
73 sizeof(struct gfs2_glock),
74 0, 0,
75 gfs2_init_glock_once, NULL);
76 if (!gfs2_glock_cachep)
77 goto fail;
79 gfs2_inode_cachep = kmem_cache_create("gfs2_inode",
80 sizeof(struct gfs2_inode),
81 0, SLAB_RECLAIM_ACCOUNT|
82 SLAB_MEM_SPREAD,
83 gfs2_init_inode_once, NULL);
84 if (!gfs2_inode_cachep)
85 goto fail;
87 gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata",
88 sizeof(struct gfs2_bufdata),
89 0, 0, NULL, NULL);
90 if (!gfs2_bufdata_cachep)
91 goto fail;
93 error = register_filesystem(&gfs2_fs_type);
94 if (error)
95 goto fail;
97 error = register_filesystem(&gfs2meta_fs_type);
98 if (error)
99 goto fail_unregister;
101 gfs2_register_debugfs();
103 printk("GFS2 (built %s %s) installed\n", __DATE__, __TIME__);
105 return 0;
107 fail_unregister:
108 unregister_filesystem(&gfs2_fs_type);
109 fail:
110 if (gfs2_bufdata_cachep)
111 kmem_cache_destroy(gfs2_bufdata_cachep);
113 if (gfs2_inode_cachep)
114 kmem_cache_destroy(gfs2_inode_cachep);
116 if (gfs2_glock_cachep)
117 kmem_cache_destroy(gfs2_glock_cachep);
119 gfs2_sys_uninit();
120 return error;
124 * exit_gfs2_fs - Unregister the file system
128 static void __exit exit_gfs2_fs(void)
130 gfs2_unregister_debugfs();
131 unregister_filesystem(&gfs2_fs_type);
132 unregister_filesystem(&gfs2meta_fs_type);
134 kmem_cache_destroy(gfs2_bufdata_cachep);
135 kmem_cache_destroy(gfs2_inode_cachep);
136 kmem_cache_destroy(gfs2_glock_cachep);
138 gfs2_sys_uninit();
141 MODULE_DESCRIPTION("Global File System");
142 MODULE_AUTHOR("Red Hat, Inc.");
143 MODULE_LICENSE("GPL");
145 module_init(init_gfs2_fs);
146 module_exit(exit_gfs2_fs);