[GitHub/mt8127/android_kernel_alcatel_ttab.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(void *foo, struct kmem_cache *cachep, unsigned long flags)
{
	struct gfs2_inode *ip = foo;

	inode_init_once(&ip->i_inode);
	spin_lock_init(&ip->i_spin);
	init_rwsem(&ip->i_rw_mutex);
	memset(ip->i_cache, 0, sizeof(ip->i_cache));
}

static void gfs2_init_glock_once(void *foo, struct kmem_cache *cachep, unsigned long flags)
{
	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:
	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_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
e18b890b	27	static void gfs2_init_inode_once(void foo, struct kmem_cache cachep, unsigned long flags)
320dd101 SW	28	{
320dd101 SW	29	struct gfs2_inode *ip = foo;
a35afb83 CL	30
	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));
320dd101 SW	35	}
320dd101 SW	36
e18b890b	37	static void gfs2_init_glock_once(void foo, struct kmem_cache cachep, unsigned long flags)
ec45d9f5 SW	38	{
ec45d9f5 SW	39	struct gfs2_glock *gl = foo;
a35afb83 CL	40
	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);
ec45d9f5 SW	51	}
ec45d9f5 SW	52
b3b94faa DT	53	/**
	54	* init_gfs2_fs - Register GFS2 as a filesystem
	55	*
	56	* Returns: 0 on success, error code on failure
	57	*/
	58
	59	static int __init init_gfs2_fs(void)
	60	{
	61	int error;
	62
b3b94faa DT	63	error = gfs2_sys_init();
	64	if (error)
	65	return error;
	66
85d1da67 SW	67	error = gfs2_glock_init();
	68	if (error)
	69	goto fail;
b3b94faa	70
85d1da67	71	error = -ENOMEM;
b3b94faa DT	72	gfs2_glock_cachep = kmem_cache_create("gfs2_glock",
b3b94faa DT	73	sizeof(struct gfs2_glock),
907b9bce	74	0, 0,
20c2df83	75	gfs2_init_glock_once);
b3b94faa DT	76	if (!gfs2_glock_cachep)
	77	goto fail;
	78
	79	gfs2_inode_cachep = kmem_cache_create("gfs2_inode",
	80	sizeof(struct gfs2_inode),
eb1dc33a AD	81	0, SLAB_RECLAIM_ACCOUNT\|
eb1dc33a AD	82	SLAB_MEM_SPREAD,
20c2df83	83	gfs2_init_inode_once);
b3b94faa DT	84	if (!gfs2_inode_cachep)
	85	goto fail;
	86
	87	gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata",
	88	sizeof(struct gfs2_bufdata),
20c2df83	89	0, 0, NULL);
b3b94faa DT	90	if (!gfs2_bufdata_cachep)
	91	goto fail;
	92
	93	error = register_filesystem(&gfs2_fs_type);
	94	if (error)
	95	goto fail;
	96
419c93e0 SW	97	error = register_filesystem(&gfs2meta_fs_type);
	98	if (error)
	99	goto fail_unregister;
	100
7c52b166 RP	101	gfs2_register_debugfs();
7c52b166 RP	102
b3b94faa DT	103	printk("GFS2 (built %s %s) installed\n", __DATE__, __TIME__);
	104
	105	return 0;
	106
419c93e0 SW	107	fail_unregister:
	108	unregister_filesystem(&gfs2_fs_type);
	109	fail:
b3b94faa DT	110	if (gfs2_bufdata_cachep)
	111	kmem_cache_destroy(gfs2_bufdata_cachep);
	112
	113	if (gfs2_inode_cachep)
	114	kmem_cache_destroy(gfs2_inode_cachep);
	115
	116	if (gfs2_glock_cachep)
	117	kmem_cache_destroy(gfs2_glock_cachep);
	118
	119	gfs2_sys_uninit();
	120	return error;
	121	}
	122
	123	/**
	124	* exit_gfs2_fs - Unregister the file system
	125	*
	126	*/
	127
	128	static void __exit exit_gfs2_fs(void)
	129	{
7c52b166	130	gfs2_unregister_debugfs();
b3b94faa	131	unregister_filesystem(&gfs2_fs_type);
419c93e0	132	unregister_filesystem(&gfs2meta_fs_type);
b3b94faa DT	133
	134	kmem_cache_destroy(gfs2_bufdata_cachep);
	135	kmem_cache_destroy(gfs2_inode_cachep);
	136	kmem_cache_destroy(gfs2_glock_cachep);
	137
	138	gfs2_sys_uninit();
	139	}
	140
	141	MODULE_DESCRIPTION("Global File System");
	142	MODULE_AUTHOR("Red Hat, Inc.");
	143	MODULE_LICENSE("GPL");
	144
	145	module_init(init_gfs2_fs);
	146	module_exit(exit_gfs2_fs);
	147