[PATCH] slab: remove kmem_cache_t
[linux-3.10.git] / fs / gfs2 / main.c
1 /*
2  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
3  * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
4  *
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  */
9
10 #include <linux/sched.h>
11 #include <linux/slab.h>
12 #include <linux/spinlock.h>
13 #include <linux/completion.h>
14 #include <linux/buffer_head.h>
15 #include <linux/module.h>
16 #include <linux/init.h>
17 #include <linux/gfs2_ondisk.h>
18 #include <linux/lm_interface.h>
19 #include <asm/atomic.h>
20
21 #include "gfs2.h"
22 #include "incore.h"
23 #include "ops_fstype.h"
24 #include "sys.h"
25 #include "util.h"
26 #include "glock.h"
27
28 static void gfs2_init_inode_once(void *foo, struct kmem_cache *cachep, unsigned long flags)
29 {
30         struct gfs2_inode *ip = foo;
31         if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
32             SLAB_CTOR_CONSTRUCTOR) {
33                 inode_init_once(&ip->i_inode);
34                 spin_lock_init(&ip->i_spin);
35                 init_rwsem(&ip->i_rw_mutex);
36                 memset(ip->i_cache, 0, sizeof(ip->i_cache));
37         }
38 }
39
40 static void gfs2_init_glock_once(void *foo, struct kmem_cache *cachep, unsigned long flags)
41 {
42         struct gfs2_glock *gl = foo;
43         if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
44             SLAB_CTOR_CONSTRUCTOR) {
45                 INIT_HLIST_NODE(&gl->gl_list);
46                 spin_lock_init(&gl->gl_spin);
47                 INIT_LIST_HEAD(&gl->gl_holders);
48                 INIT_LIST_HEAD(&gl->gl_waiters1);
49                 INIT_LIST_HEAD(&gl->gl_waiters2);
50                 INIT_LIST_HEAD(&gl->gl_waiters3);
51                 gl->gl_lvb = NULL;
52                 atomic_set(&gl->gl_lvb_count, 0);
53                 INIT_LIST_HEAD(&gl->gl_reclaim);
54                 INIT_LIST_HEAD(&gl->gl_ail_list);
55                 atomic_set(&gl->gl_ail_count, 0);
56         }
57 }
58
59 /**
60  * init_gfs2_fs - Register GFS2 as a filesystem
61  *
62  * Returns: 0 on success, error code on failure
63  */
64
65 static int __init init_gfs2_fs(void)
66 {
67         int error;
68
69         error = gfs2_sys_init();
70         if (error)
71                 return error;
72
73         error = gfs2_glock_init();
74         if (error)
75                 goto fail;
76
77         error = -ENOMEM;
78         gfs2_glock_cachep = kmem_cache_create("gfs2_glock",
79                                               sizeof(struct gfs2_glock),
80                                               0, 0,
81                                               gfs2_init_glock_once, NULL);
82         if (!gfs2_glock_cachep)
83                 goto fail;
84
85         gfs2_inode_cachep = kmem_cache_create("gfs2_inode",
86                                               sizeof(struct gfs2_inode),
87                                               0,  SLAB_RECLAIM_ACCOUNT|
88                                                   SLAB_MEM_SPREAD,
89                                               gfs2_init_inode_once, NULL);
90         if (!gfs2_inode_cachep)
91                 goto fail;
92
93         gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata",
94                                                 sizeof(struct gfs2_bufdata),
95                                                 0, 0, NULL, NULL);
96         if (!gfs2_bufdata_cachep)
97                 goto fail;
98
99         error = register_filesystem(&gfs2_fs_type);
100         if (error)
101                 goto fail;
102
103         error = register_filesystem(&gfs2meta_fs_type);
104         if (error)
105                 goto fail_unregister;
106
107         printk("GFS2 (built %s %s) installed\n", __DATE__, __TIME__);
108
109         return 0;
110
111 fail_unregister:
112         unregister_filesystem(&gfs2_fs_type);
113 fail:
114         if (gfs2_bufdata_cachep)
115                 kmem_cache_destroy(gfs2_bufdata_cachep);
116
117         if (gfs2_inode_cachep)
118                 kmem_cache_destroy(gfs2_inode_cachep);
119
120         if (gfs2_glock_cachep)
121                 kmem_cache_destroy(gfs2_glock_cachep);
122
123         gfs2_sys_uninit();
124         return error;
125 }
126
127 /**
128  * exit_gfs2_fs - Unregister the file system
129  *
130  */
131
132 static void __exit exit_gfs2_fs(void)
133 {
134         unregister_filesystem(&gfs2_fs_type);
135         unregister_filesystem(&gfs2meta_fs_type);
136
137         kmem_cache_destroy(gfs2_bufdata_cachep);
138         kmem_cache_destroy(gfs2_inode_cachep);
139         kmem_cache_destroy(gfs2_glock_cachep);
140
141         gfs2_sys_uninit();
142 }
143
144 MODULE_DESCRIPTION("Global File System");
145 MODULE_AUTHOR("Red Hat, Inc.");
146 MODULE_LICENSE("GPL");
147
148 module_init(init_gfs2_fs);
149 module_exit(exit_gfs2_fs);
150