[deliverable/linux.git] / fs / gfs2 / main.c

/*
 * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
 * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
 *
 * This copyrighted material is made available to anyone wishing to use,
 * modify, copy, or redistribute it subject to the terms and conditions
 * of the GNU General Public License version 2.
 */

#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/completion.h>
#include <linux/buffer_head.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/gfs2_ondisk.h>
#include <linux/lm_interface.h>
#include <asm/atomic.h>

#include "gfs2.h"
#include "incore.h"
#include "ops_fstype.h"
#include "sys.h"
#include "util.h"
#include "glock.h"

static void gfs2_init_inode_once(struct kmem_cache *cachep, void *foo)
{
	struct gfs2_inode *ip = foo;

	inode_init_once(&ip->i_inode);
	init_rwsem(&ip->i_rw_mutex);
	ip->i_alloc = NULL;
}

static void gfs2_init_glock_once(struct kmem_cache *cachep, void *foo)
{
	struct gfs2_glock *gl = foo;

	INIT_HLIST_NODE(&gl->gl_list);
	spin_lock_init(&gl->gl_spin);
	INIT_LIST_HEAD(&gl->gl_holders);
	INIT_LIST_HEAD(&gl->gl_waiters1);
	INIT_LIST_HEAD(&gl->gl_waiters3);
	gl->gl_lvb = NULL;
	atomic_set(&gl->gl_lvb_count, 0);
	INIT_LIST_HEAD(&gl->gl_reclaim);
	INIT_LIST_HEAD(&gl->gl_ail_list);
	atomic_set(&gl->gl_ail_count, 0);
}

/**
 * init_gfs2_fs - Register GFS2 as a filesystem
 *
 * Returns: 0 on success, error code on failure
 */

static int __init init_gfs2_fs(void)
{
	int error;

	error = gfs2_sys_init();
	if (error)
		return error;

	error = gfs2_glock_init();
	if (error)
		goto fail;

	error = -ENOMEM;
	gfs2_glock_cachep = kmem_cache_create("gfs2_glock",
					      sizeof(struct gfs2_glock),
					      0, 0,
					      gfs2_init_glock_once);
	if (!gfs2_glock_cachep)
		goto fail;

	gfs2_inode_cachep = kmem_cache_create("gfs2_inode",
					      sizeof(struct gfs2_inode),
					      0,  SLAB_RECLAIM_ACCOUNT|
					          SLAB_MEM_SPREAD,
					      gfs2_init_inode_once);
	if (!gfs2_inode_cachep)
		goto fail;

	gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata",
						sizeof(struct gfs2_bufdata),
					        0, 0, NULL);
	if (!gfs2_bufdata_cachep)
		goto fail;

	error = register_filesystem(&gfs2_fs_type);
	if (error)
		goto fail;

	error = register_filesystem(&gfs2meta_fs_type);
	if (error)
		goto fail_unregister;

	gfs2_register_debugfs();

	printk("GFS2 (built %s %s) installed\n", __DATE__, __TIME__);

	return 0;

fail_unregister:
	unregister_filesystem(&gfs2_fs_type);
fail:
	gfs2_glock_exit();

	if (gfs2_bufdata_cachep)
		kmem_cache_destroy(gfs2_bufdata_cachep);

	if (gfs2_inode_cachep)
		kmem_cache_destroy(gfs2_inode_cachep);

	if (gfs2_glock_cachep)
		kmem_cache_destroy(gfs2_glock_cachep);

	gfs2_sys_uninit();
	return error;
}

/**
 * exit_gfs2_fs - Unregister the file system
 *
 */

static void __exit exit_gfs2_fs(void)
{
	gfs2_glock_exit();
	gfs2_unregister_debugfs();
	unregister_filesystem(&gfs2_fs_type);
	unregister_filesystem(&gfs2meta_fs_type);

	kmem_cache_destroy(gfs2_bufdata_cachep);
	kmem_cache_destroy(gfs2_inode_cachep);
	kmem_cache_destroy(gfs2_glock_cachep);

	gfs2_sys_uninit();
}

MODULE_DESCRIPTION("Global File System");
MODULE_AUTHOR("Red Hat, Inc.");
MODULE_LICENSE("GPL");

module_init(init_gfs2_fs);
module_exit(exit_gfs2_fs);
Commit	Line	Data
b3b94faa DT	1	/*
b3b94faa DT	2	* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3a8a9a10	3	* Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
b3b94faa DT	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
e9fc2aa0	7	* of the GNU General Public License version 2.
b3b94faa DT	8	*/
b3b94faa DT	9
b3b94faa DT	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>
5c676f6d	16	#include <linux/gfs2_ondisk.h>
7d308590	17	#include <linux/lm_interface.h>
ec45d9f5	18	#include <asm/atomic.h>
b3b94faa DT	19
b3b94faa DT	20	#include "gfs2.h"
5c676f6d	21	#include "incore.h"
b3b94faa DT	22	#include "ops_fstype.h"
b3b94faa DT	23	#include "sys.h"
5c676f6d	24	#include "util.h"
85d1da67	25	#include "glock.h"
b3b94faa	26
4ba9b9d0	27	static void gfs2_init_inode_once(struct kmem_cache cachep, void foo)
320dd101 SW	28	{
320dd101 SW	29	struct gfs2_inode *ip = foo;
a35afb83 CL	30
a35afb83 CL	31	inode_init_once(&ip->i_inode);
a35afb83	32	init_rwsem(&ip->i_rw_mutex);
6dbd8224	33	ip->i_alloc = NULL;
320dd101 SW	34	}
320dd101 SW	35
4ba9b9d0	36	static void gfs2_init_glock_once(struct kmem_cache cachep, void foo)
ec45d9f5 SW	37	{
ec45d9f5 SW	38	struct gfs2_glock *gl = foo;
a35afb83 CL	39
	40	INIT_HLIST_NODE(&gl->gl_list);
	41	spin_lock_init(&gl->gl_spin);
	42	INIT_LIST_HEAD(&gl->gl_holders);
	43	INIT_LIST_HEAD(&gl->gl_waiters1);
	44	INIT_LIST_HEAD(&gl->gl_waiters3);
	45	gl->gl_lvb = NULL;
	46	atomic_set(&gl->gl_lvb_count, 0);
	47	INIT_LIST_HEAD(&gl->gl_reclaim);
	48	INIT_LIST_HEAD(&gl->gl_ail_list);
	49	atomic_set(&gl->gl_ail_count, 0);
ec45d9f5 SW	50	}
ec45d9f5 SW	51
b3b94faa DT	52	/**
	53	* init_gfs2_fs - Register GFS2 as a filesystem
	54	*
	55	* Returns: 0 on success, error code on failure
	56	*/
	57
	58	static int __init init_gfs2_fs(void)
	59	{
	60	int error;
	61
b3b94faa DT	62	error = gfs2_sys_init();
	63	if (error)
	64	return error;
	65
85d1da67 SW	66	error = gfs2_glock_init();
	67	if (error)
	68	goto fail;
b3b94faa	69
85d1da67	70	error = -ENOMEM;
b3b94faa DT	71	gfs2_glock_cachep = kmem_cache_create("gfs2_glock",
b3b94faa DT	72	sizeof(struct gfs2_glock),
907b9bce	73	0, 0,
20c2df83	74	gfs2_init_glock_once);
b3b94faa DT	75	if (!gfs2_glock_cachep)
	76	goto fail;
	77
	78	gfs2_inode_cachep = kmem_cache_create("gfs2_inode",
	79	sizeof(struct gfs2_inode),
eb1dc33a AD	80	0, SLAB_RECLAIM_ACCOUNT\|
eb1dc33a AD	81	SLAB_MEM_SPREAD,
20c2df83	82	gfs2_init_inode_once);
b3b94faa DT	83	if (!gfs2_inode_cachep)
	84	goto fail;
	85
	86	gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata",
	87	sizeof(struct gfs2_bufdata),
20c2df83	88	0, 0, NULL);
b3b94faa DT	89	if (!gfs2_bufdata_cachep)
	90	goto fail;
	91
	92	error = register_filesystem(&gfs2_fs_type);
	93	if (error)
	94	goto fail;
	95
419c93e0 SW	96	error = register_filesystem(&gfs2meta_fs_type);
	97	if (error)
	98	goto fail_unregister;
	99
7c52b166 RP	100	gfs2_register_debugfs();
7c52b166 RP	101
b3b94faa DT	102	printk("GFS2 (built %s %s) installed\n", __DATE__, __TIME__);
	103
	104	return 0;
	105
419c93e0 SW	106	fail_unregister:
	107	unregister_filesystem(&gfs2_fs_type);
	108	fail:
8fbbfd21 SW	109	gfs2_glock_exit();
8fbbfd21 SW	110
b3b94faa DT	111	if (gfs2_bufdata_cachep)
	112	kmem_cache_destroy(gfs2_bufdata_cachep);
	113
	114	if (gfs2_inode_cachep)
	115	kmem_cache_destroy(gfs2_inode_cachep);
	116
	117	if (gfs2_glock_cachep)
	118	kmem_cache_destroy(gfs2_glock_cachep);
	119
	120	gfs2_sys_uninit();
	121	return error;
	122	}
	123
	124	/**
	125	* exit_gfs2_fs - Unregister the file system
	126	*
	127	*/
	128
	129	static void __exit exit_gfs2_fs(void)
	130	{
8fbbfd21	131	gfs2_glock_exit();
7c52b166	132	gfs2_unregister_debugfs();
b3b94faa	133	unregister_filesystem(&gfs2_fs_type);
419c93e0	134	unregister_filesystem(&gfs2meta_fs_type);
b3b94faa DT	135
	136	kmem_cache_destroy(gfs2_bufdata_cachep);
	137	kmem_cache_destroy(gfs2_inode_cachep);
	138	kmem_cache_destroy(gfs2_glock_cachep);
	139
	140	gfs2_sys_uninit();
	141	}
	142
	143	MODULE_DESCRIPTION("Global File System");
	144	MODULE_AUTHOR("Red Hat, Inc.");
	145	MODULE_LICENSE("GPL");
	146
	147	module_init(init_gfs2_fs);
	148	module_exit(exit_gfs2_fs);
	149