Merge branch 'media_fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab...
[cris-mirror.git] / fs / gfs2 / main.c
blobebef7ab6e17e4f55396888bce84287d1e5b4a240
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 <asm/atomic.h>
19 #include "gfs2.h"
20 #include "incore.h"
21 #include "super.h"
22 #include "sys.h"
23 #include "util.h"
24 #include "glock.h"
25 #include "quota.h"
26 #include "recovery.h"
27 #include "dir.h"
29 static struct shrinker qd_shrinker = {
30 .shrink = gfs2_shrink_qd_memory,
31 .seeks = DEFAULT_SEEKS,
34 static void gfs2_init_inode_once(void *foo)
36 struct gfs2_inode *ip = foo;
38 inode_init_once(&ip->i_inode);
39 init_rwsem(&ip->i_rw_mutex);
40 INIT_LIST_HEAD(&ip->i_trunc_list);
41 ip->i_alloc = NULL;
44 static void gfs2_init_glock_once(void *foo)
46 struct gfs2_glock *gl = foo;
48 INIT_HLIST_NODE(&gl->gl_list);
49 spin_lock_init(&gl->gl_spin);
50 INIT_LIST_HEAD(&gl->gl_holders);
51 INIT_LIST_HEAD(&gl->gl_lru);
52 INIT_LIST_HEAD(&gl->gl_ail_list);
53 atomic_set(&gl->gl_ail_count, 0);
56 static void gfs2_init_gl_aspace_once(void *foo)
58 struct gfs2_glock *gl = foo;
59 struct address_space *mapping = (struct address_space *)(gl + 1);
61 gfs2_init_glock_once(gl);
62 memset(mapping, 0, sizeof(*mapping));
63 INIT_RADIX_TREE(&mapping->page_tree, GFP_ATOMIC);
64 spin_lock_init(&mapping->tree_lock);
65 spin_lock_init(&mapping->i_mmap_lock);
66 INIT_LIST_HEAD(&mapping->private_list);
67 spin_lock_init(&mapping->private_lock);
68 INIT_RAW_PRIO_TREE_ROOT(&mapping->i_mmap);
69 INIT_LIST_HEAD(&mapping->i_mmap_nonlinear);
72 /**
73 * init_gfs2_fs - Register GFS2 as a filesystem
75 * Returns: 0 on success, error code on failure
78 static int __init init_gfs2_fs(void)
80 int error;
82 gfs2_str2qstr(&gfs2_qdot, ".");
83 gfs2_str2qstr(&gfs2_qdotdot, "..");
85 error = gfs2_sys_init();
86 if (error)
87 return error;
89 error = gfs2_glock_init();
90 if (error)
91 goto fail;
93 error = -ENOMEM;
94 gfs2_glock_cachep = kmem_cache_create("gfs2_glock",
95 sizeof(struct gfs2_glock),
96 0, 0,
97 gfs2_init_glock_once);
98 if (!gfs2_glock_cachep)
99 goto fail;
101 gfs2_glock_aspace_cachep = kmem_cache_create("gfs2_glock(aspace)",
102 sizeof(struct gfs2_glock) +
103 sizeof(struct address_space),
104 0, 0, gfs2_init_gl_aspace_once);
106 if (!gfs2_glock_aspace_cachep)
107 goto fail;
109 gfs2_inode_cachep = kmem_cache_create("gfs2_inode",
110 sizeof(struct gfs2_inode),
111 0, SLAB_RECLAIM_ACCOUNT|
112 SLAB_MEM_SPREAD,
113 gfs2_init_inode_once);
114 if (!gfs2_inode_cachep)
115 goto fail;
117 gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata",
118 sizeof(struct gfs2_bufdata),
119 0, 0, NULL);
120 if (!gfs2_bufdata_cachep)
121 goto fail;
123 gfs2_rgrpd_cachep = kmem_cache_create("gfs2_rgrpd",
124 sizeof(struct gfs2_rgrpd),
125 0, 0, NULL);
126 if (!gfs2_rgrpd_cachep)
127 goto fail;
129 gfs2_quotad_cachep = kmem_cache_create("gfs2_quotad",
130 sizeof(struct gfs2_quota_data),
131 0, 0, NULL);
132 if (!gfs2_quotad_cachep)
133 goto fail;
135 register_shrinker(&qd_shrinker);
137 error = register_filesystem(&gfs2_fs_type);
138 if (error)
139 goto fail;
141 error = register_filesystem(&gfs2meta_fs_type);
142 if (error)
143 goto fail_unregister;
145 error = -ENOMEM;
146 gfs_recovery_wq = alloc_workqueue("gfs_recovery",
147 WQ_MEM_RECLAIM | WQ_FREEZEABLE, 0);
148 if (!gfs_recovery_wq)
149 goto fail_wq;
151 gfs2_register_debugfs();
153 printk("GFS2 (built %s %s) installed\n", __DATE__, __TIME__);
155 return 0;
157 fail_wq:
158 unregister_filesystem(&gfs2meta_fs_type);
159 fail_unregister:
160 unregister_filesystem(&gfs2_fs_type);
161 fail:
162 unregister_shrinker(&qd_shrinker);
163 gfs2_glock_exit();
165 if (gfs2_quotad_cachep)
166 kmem_cache_destroy(gfs2_quotad_cachep);
168 if (gfs2_rgrpd_cachep)
169 kmem_cache_destroy(gfs2_rgrpd_cachep);
171 if (gfs2_bufdata_cachep)
172 kmem_cache_destroy(gfs2_bufdata_cachep);
174 if (gfs2_inode_cachep)
175 kmem_cache_destroy(gfs2_inode_cachep);
177 if (gfs2_glock_aspace_cachep)
178 kmem_cache_destroy(gfs2_glock_aspace_cachep);
180 if (gfs2_glock_cachep)
181 kmem_cache_destroy(gfs2_glock_cachep);
183 gfs2_sys_uninit();
184 return error;
188 * exit_gfs2_fs - Unregister the file system
192 static void __exit exit_gfs2_fs(void)
194 unregister_shrinker(&qd_shrinker);
195 gfs2_glock_exit();
196 gfs2_unregister_debugfs();
197 unregister_filesystem(&gfs2_fs_type);
198 unregister_filesystem(&gfs2meta_fs_type);
199 destroy_workqueue(gfs_recovery_wq);
201 kmem_cache_destroy(gfs2_quotad_cachep);
202 kmem_cache_destroy(gfs2_rgrpd_cachep);
203 kmem_cache_destroy(gfs2_bufdata_cachep);
204 kmem_cache_destroy(gfs2_inode_cachep);
205 kmem_cache_destroy(gfs2_glock_aspace_cachep);
206 kmem_cache_destroy(gfs2_glock_cachep);
208 gfs2_sys_uninit();
211 MODULE_DESCRIPTION("Global File System");
212 MODULE_AUTHOR("Red Hat, Inc.");
213 MODULE_LICENSE("GPL");
215 module_init(init_gfs2_fs);
216 module_exit(exit_gfs2_fs);