[mirror_ubuntu-artful-kernel.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/sched.h>
#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 <asm/atomic.h>

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

static void gfs2_init_inode_once(void *foo, kmem_cache_t *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, kmem_cache_t *cachep, unsigned long flags)
{
	struct gfs2_glock *gl = foo;
	if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
	    SLAB_CTOR_CONSTRUCTOR) {
		INIT_LIST_HEAD(&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 = -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_PANIC|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	*/
	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>
5c676f6d	17	#include <linux/gfs2_ondisk.h>
ec45d9f5	18	#include <asm/atomic.h>
b3b94faa DT	19
b3b94faa DT	20	#include "gfs2.h"
5c676f6d SW	21	#include "lm_interface.h"
5c676f6d SW	22	#include "incore.h"
b3b94faa DT	23	#include "ops_fstype.h"
b3b94faa DT	24	#include "sys.h"
5c676f6d	25	#include "util.h"
b3b94faa	26
320dd101 SW	27	static void gfs2_init_inode_once(void foo, kmem_cache_t cachep, unsigned long flags)
	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
ec45d9f5 SW	39	static void gfs2_init_glock_once(void foo, kmem_cache_t cachep, unsigned long flags)
	40	{
	41	struct gfs2_glock *gl = foo;
	42	if ((flags & (SLAB_CTOR_VERIFY\|SLAB_CTOR_CONSTRUCTOR)) ==
	43	SLAB_CTOR_CONSTRUCTOR) {
	44	INIT_LIST_HEAD(&gl->gl_list);
	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
	72	error = -ENOMEM;
	73
	74	gfs2_glock_cachep = kmem_cache_create("gfs2_glock",
	75	sizeof(struct gfs2_glock),
ec45d9f5 SW	76	0, 0,
ec45d9f5 SW	77	gfs2_init_glock_once, NULL);
b3b94faa DT	78	if (!gfs2_glock_cachep)
	79	goto fail;
	80
	81	gfs2_inode_cachep = kmem_cache_create("gfs2_inode",
	82	sizeof(struct gfs2_inode),
320dd101 SW	83	0, (SLAB_RECLAIM_ACCOUNT\|
	84	SLAB_PANIC\|SLAB_MEM_SPREAD),
	85	gfs2_init_inode_once, NULL);
b3b94faa DT	86	if (!gfs2_inode_cachep)
	87	goto fail;
	88
	89	gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata",
	90	sizeof(struct gfs2_bufdata),
	91	0, 0, NULL, NULL);
	92	if (!gfs2_bufdata_cachep)
	93	goto fail;
	94
	95	error = register_filesystem(&gfs2_fs_type);
	96	if (error)
	97	goto fail;
	98
419c93e0 SW	99	error = register_filesystem(&gfs2meta_fs_type);
	100	if (error)
	101	goto fail_unregister;
	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	{
	130	unregister_filesystem(&gfs2_fs_type);
419c93e0	131	unregister_filesystem(&gfs2meta_fs_type);
b3b94faa DT	132
	133	kmem_cache_destroy(gfs2_bufdata_cachep);
	134	kmem_cache_destroy(gfs2_inode_cachep);
	135	kmem_cache_destroy(gfs2_glock_cachep);
	136
	137	gfs2_sys_uninit();
	138	}
	139
	140	MODULE_DESCRIPTION("Global File System");
	141	MODULE_AUTHOR("Red Hat, Inc.");
	142	MODULE_LICENSE("GPL");
	143
	144	module_init(init_gfs2_fs);
	145	module_exit(exit_gfs2_fs);
	146