[net-next-2.6.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;
	if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
	    SLAB_CTOR_CONSTRUCTOR) {
		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;
	if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
	    SLAB_CTOR_CONSTRUCTOR) {
		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_waiters2);
		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, NULL);
	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, NULL);
	if (!gfs2_inode_cachep)
		goto fail;

	gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata",
						sizeof(struct gfs2_bufdata),
					        0, 0, NULL, 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;

	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)
{
	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	{
	29	struct gfs2_inode *ip = foo;
	30	if ((flags & (SLAB_CTOR_VERIFY\|SLAB_CTOR_CONSTRUCTOR)) ==
	31	SLAB_CTOR_CONSTRUCTOR) {
	32	inode_init_once(&ip->i_inode);
320dd101 SW	33	spin_lock_init(&ip->i_spin);
	34	init_rwsem(&ip->i_rw_mutex);
	35	memset(ip->i_cache, 0, sizeof(ip->i_cache));
	36	}
	37	}
	38
e18b890b	39	static void gfs2_init_glock_once(void foo, struct kmem_cache cachep, unsigned long flags)
ec45d9f5 SW	40	{
	41	struct gfs2_glock *gl = foo;
	42	if ((flags & (SLAB_CTOR_VERIFY\|SLAB_CTOR_CONSTRUCTOR)) ==
	43	SLAB_CTOR_CONSTRUCTOR) {
b6397893	44	INIT_HLIST_NODE(&gl->gl_list);
ec45d9f5 SW	45	spin_lock_init(&gl->gl_spin);
	46	INIT_LIST_HEAD(&gl->gl_holders);
	47	INIT_LIST_HEAD(&gl->gl_waiters1);
	48	INIT_LIST_HEAD(&gl->gl_waiters2);
	49	INIT_LIST_HEAD(&gl->gl_waiters3);
	50	gl->gl_lvb = NULL;
	51	atomic_set(&gl->gl_lvb_count, 0);
	52	INIT_LIST_HEAD(&gl->gl_reclaim);
	53	INIT_LIST_HEAD(&gl->gl_ail_list);
	54	atomic_set(&gl->gl_ail_count, 0);
	55	}
	56	}
	57
b3b94faa DT	58	/**
	59	* init_gfs2_fs - Register GFS2 as a filesystem
	60	*
	61	* Returns: 0 on success, error code on failure
	62	*/
	63
	64	static int __init init_gfs2_fs(void)
	65	{
	66	int error;
	67
b3b94faa DT	68	error = gfs2_sys_init();
	69	if (error)
	70	return error;
	71
85d1da67 SW	72	error = gfs2_glock_init();
	73	if (error)
	74	goto fail;
b3b94faa	75
85d1da67	76	error = -ENOMEM;
b3b94faa DT	77	gfs2_glock_cachep = kmem_cache_create("gfs2_glock",
b3b94faa DT	78	sizeof(struct gfs2_glock),
907b9bce	79	0, 0,
ec45d9f5	80	gfs2_init_glock_once, NULL);
b3b94faa DT	81	if (!gfs2_glock_cachep)
	82	goto fail;
	83
	84	gfs2_inode_cachep = kmem_cache_create("gfs2_inode",
	85	sizeof(struct gfs2_inode),
eb1dc33a AD	86	0, SLAB_RECLAIM_ACCOUNT\|
eb1dc33a AD	87	SLAB_MEM_SPREAD,
320dd101	88	gfs2_init_inode_once, NULL);
b3b94faa DT	89	if (!gfs2_inode_cachep)
	90	goto fail;
	91
	92	gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata",
	93	sizeof(struct gfs2_bufdata),
	94	0, 0, NULL, NULL);
	95	if (!gfs2_bufdata_cachep)
	96	goto fail;
	97
	98	error = register_filesystem(&gfs2_fs_type);
	99	if (error)
	100	goto fail;
	101
419c93e0 SW	102	error = register_filesystem(&gfs2meta_fs_type);
	103	if (error)
	104	goto fail_unregister;
	105
b3b94faa DT	106	printk("GFS2 (built %s %s) installed\n", __DATE__, __TIME__);
	107
	108	return 0;
	109
419c93e0 SW	110	fail_unregister:
	111	unregister_filesystem(&gfs2_fs_type);
	112	fail:
b3b94faa DT	113	if (gfs2_bufdata_cachep)
	114	kmem_cache_destroy(gfs2_bufdata_cachep);
	115
	116	if (gfs2_inode_cachep)
	117	kmem_cache_destroy(gfs2_inode_cachep);
	118
	119	if (gfs2_glock_cachep)
	120	kmem_cache_destroy(gfs2_glock_cachep);
	121
	122	gfs2_sys_uninit();
	123	return error;
	124	}
	125
	126	/**
	127	* exit_gfs2_fs - Unregister the file system
	128	*
	129	*/
	130
	131	static void __exit exit_gfs2_fs(void)
	132	{
	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