184 lines
4.0 KiB
C
184 lines
4.0 KiB
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 <asm/atomic.h>
|
|
#include <linux/slow-work.h>
|
|
|
|
#include "gfs2.h"
|
|
#include "incore.h"
|
|
#include "super.h"
|
|
#include "sys.h"
|
|
#include "util.h"
|
|
#include "glock.h"
|
|
#include "quota.h"
|
|
|
|
static struct shrinker qd_shrinker = {
|
|
.shrink = gfs2_shrink_qd_memory,
|
|
.seeks = DEFAULT_SEEKS,
|
|
};
|
|
|
|
static void gfs2_init_inode_once(void *foo)
|
|
{
|
|
struct gfs2_inode *ip = foo;
|
|
|
|
inode_init_once(&ip->i_inode);
|
|
init_rwsem(&ip->i_rw_mutex);
|
|
INIT_LIST_HEAD(&ip->i_trunc_list);
|
|
ip->i_alloc = NULL;
|
|
}
|
|
|
|
static void gfs2_init_glock_once(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_lru);
|
|
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;
|
|
|
|
gfs2_rgrpd_cachep = kmem_cache_create("gfs2_rgrpd",
|
|
sizeof(struct gfs2_rgrpd),
|
|
0, 0, NULL);
|
|
if (!gfs2_rgrpd_cachep)
|
|
goto fail;
|
|
|
|
gfs2_quotad_cachep = kmem_cache_create("gfs2_quotad",
|
|
sizeof(struct gfs2_quota_data),
|
|
0, 0, NULL);
|
|
if (!gfs2_quotad_cachep)
|
|
goto fail;
|
|
|
|
register_shrinker(&qd_shrinker);
|
|
|
|
error = register_filesystem(&gfs2_fs_type);
|
|
if (error)
|
|
goto fail;
|
|
|
|
error = register_filesystem(&gfs2meta_fs_type);
|
|
if (error)
|
|
goto fail_unregister;
|
|
|
|
error = slow_work_register_user(THIS_MODULE);
|
|
if (error)
|
|
goto fail_slow;
|
|
|
|
gfs2_register_debugfs();
|
|
|
|
printk("GFS2 (built %s %s) installed\n", __DATE__, __TIME__);
|
|
|
|
return 0;
|
|
|
|
fail_slow:
|
|
unregister_filesystem(&gfs2meta_fs_type);
|
|
fail_unregister:
|
|
unregister_filesystem(&gfs2_fs_type);
|
|
fail:
|
|
unregister_shrinker(&qd_shrinker);
|
|
gfs2_glock_exit();
|
|
|
|
if (gfs2_quotad_cachep)
|
|
kmem_cache_destroy(gfs2_quotad_cachep);
|
|
|
|
if (gfs2_rgrpd_cachep)
|
|
kmem_cache_destroy(gfs2_rgrpd_cachep);
|
|
|
|
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_shrinker(&qd_shrinker);
|
|
gfs2_glock_exit();
|
|
gfs2_unregister_debugfs();
|
|
unregister_filesystem(&gfs2_fs_type);
|
|
unregister_filesystem(&gfs2meta_fs_type);
|
|
slow_work_unregister_user(THIS_MODULE);
|
|
|
|
kmem_cache_destroy(gfs2_quotad_cachep);
|
|
kmem_cache_destroy(gfs2_rgrpd_cachep);
|
|
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);
|
|
|