[mirror_ubuntu-jammy-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 v.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 "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));
	}
}

/**
 * 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;

	gfs2_init_lmh();

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

	error = -ENOMEM;

	gfs2_glock_cachep = kmem_cache_create("gfs2_glock",
					      sizeof(struct gfs2_glock),
					      0, 0, NULL, 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
	7	* of the GNU General Public License v.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>
5c676f6d	17	#include <linux/gfs2_ondisk.h>
b3b94faa DT	18
b3b94faa DT	19	#include "gfs2.h"
5c676f6d SW	20	#include "lm_interface.h"
5c676f6d SW	21	#include "incore.h"
b3b94faa DT	22	#include "ops_fstype.h"
b3b94faa DT	23	#include "sys.h"
5c676f6d	24	#include "util.h"
b3b94faa	25
320dd101 SW	26	static void gfs2_init_inode_once(void foo, kmem_cache_t cachep, unsigned long flags)
	27	{
	28	struct gfs2_inode *ip = foo;
	29	if ((flags & (SLAB_CTOR_VERIFY\|SLAB_CTOR_CONSTRUCTOR)) ==
	30	SLAB_CTOR_CONSTRUCTOR) {
	31	inode_init_once(&ip->i_inode);
320dd101 SW	32	spin_lock_init(&ip->i_spin);
	33	init_rwsem(&ip->i_rw_mutex);
	34	memset(ip->i_cache, 0, sizeof(ip->i_cache));
	35	}
	36	}
	37
b3b94faa DT	38	/**
	39	* init_gfs2_fs - Register GFS2 as a filesystem
	40	*
	41	* Returns: 0 on success, error code on failure
	42	*/
	43
	44	static int __init init_gfs2_fs(void)
	45	{
	46	int error;
	47
	48	gfs2_init_lmh();
	49
	50	error = gfs2_sys_init();
	51	if (error)
	52	return error;
	53
	54	error = -ENOMEM;
	55
	56	gfs2_glock_cachep = kmem_cache_create("gfs2_glock",
	57	sizeof(struct gfs2_glock),
	58	0, 0, NULL, NULL);
	59	if (!gfs2_glock_cachep)
	60	goto fail;
	61
	62	gfs2_inode_cachep = kmem_cache_create("gfs2_inode",
	63	sizeof(struct gfs2_inode),
320dd101 SW	64	0, (SLAB_RECLAIM_ACCOUNT\|
	65	SLAB_PANIC\|SLAB_MEM_SPREAD),
	66	gfs2_init_inode_once, NULL);
b3b94faa DT	67	if (!gfs2_inode_cachep)
	68	goto fail;
	69
	70	gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata",
	71	sizeof(struct gfs2_bufdata),
	72	0, 0, NULL, NULL);
	73	if (!gfs2_bufdata_cachep)
	74	goto fail;
	75
	76	error = register_filesystem(&gfs2_fs_type);
	77	if (error)
	78	goto fail;
	79
419c93e0 SW	80	error = register_filesystem(&gfs2meta_fs_type);
	81	if (error)
	82	goto fail_unregister;
	83
b3b94faa DT	84	printk("GFS2 (built %s %s) installed\n", __DATE__, __TIME__);
	85
	86	return 0;
	87
419c93e0 SW	88	fail_unregister:
	89	unregister_filesystem(&gfs2_fs_type);
	90	fail:
b3b94faa DT	91	if (gfs2_bufdata_cachep)
	92	kmem_cache_destroy(gfs2_bufdata_cachep);
	93
	94	if (gfs2_inode_cachep)
	95	kmem_cache_destroy(gfs2_inode_cachep);
	96
	97	if (gfs2_glock_cachep)
	98	kmem_cache_destroy(gfs2_glock_cachep);
	99
	100	gfs2_sys_uninit();
	101	return error;
	102	}
	103
	104	/**
	105	* exit_gfs2_fs - Unregister the file system
	106	*
	107	*/
	108
	109	static void __exit exit_gfs2_fs(void)
	110	{
	111	unregister_filesystem(&gfs2_fs_type);
419c93e0	112	unregister_filesystem(&gfs2meta_fs_type);
b3b94faa DT	113
	114	kmem_cache_destroy(gfs2_bufdata_cachep);
	115	kmem_cache_destroy(gfs2_inode_cachep);
	116	kmem_cache_destroy(gfs2_glock_cachep);
	117
	118	gfs2_sys_uninit();
	119	}
	120
	121	MODULE_DESCRIPTION("Global File System");
	122	MODULE_AUTHOR("Red Hat, Inc.");
	123	MODULE_LICENSE("GPL");
	124
	125	module_init(init_gfs2_fs);
	126	module_exit(exit_gfs2_fs);
	127