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/*
* 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.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#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/rcupdate.h>
#include <linux/rculist_bl.h>
#include <linux/atomic.h>
#include <linux/mempool.h>
#include "gfs2.h"
#include "incore.h"
#include "super.h"
#include "sys.h"
#include "util.h"
#include "glock.h"
#include "quota.h"
#include "recovery.h"
#include "dir.h"
#include "glops.h"
struct workqueue_struct *gfs2_control_wq;
static void gfs2_init_inode_once(void *foo)
{
struct gfs2_inode *ip = foo;
inode_init_once(&ip->i_inode);
atomic_set(&ip->i_sizehint, 0);
init_rwsem(&ip->i_rw_mutex);
INIT_LIST_HEAD(&ip->i_trunc_list);
ip->i_qadata = NULL;
gfs2_holder_mark_uninitialized(&ip->i_rgd_gh);
memset(&ip->i_res, 0, sizeof(ip->i_res));
RB_CLEAR_NODE(&ip->i_res.rs_node);
ip->i_hash_cache = NULL;
gfs2_holder_mark_uninitialized(&ip->i_iopen_gh);
}
static void gfs2_init_glock_once(void *foo)
{
struct gfs2_glock *gl = foo;
spin_lock_init(&gl->gl_lockref.lock);
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);
atomic_set(&gl->gl_revokes, 0);
}
static void gfs2_init_gl_aspace_once(void *foo)
{
struct gfs2_glock *gl = foo;
struct address_space *mapping = (struct address_space *)(gl + 1);
gfs2_init_glock_once(gl);
address_space_init_once(mapping);
}
/**
* 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_str2qstr(&gfs2_qdot, ".");
gfs2_str2qstr(&gfs2_qdotdot, "..");
gfs2_quota_hash_init();
error = gfs2_sys_init();
if (error)
return error;
error = list_lru_init(&gfs2_qd_lru);
if (error)
goto fail_lru;
error = gfs2_glock_init();
if (error)
goto fail_glock;
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_cachep1;
gfs2_glock_aspace_cachep = kmem_cache_create("gfs2_glock(aspace)",
sizeof(struct gfs2_glock) +
sizeof(struct address_space),
0, 0, gfs2_init_gl_aspace_once);
if (!gfs2_glock_aspace_cachep)
goto fail_cachep2;
gfs2_inode_cachep = kmem_cache_create("gfs2_inode",
sizeof(struct gfs2_inode),
0, SLAB_RECLAIM_ACCOUNT|
SLAB_MEM_SPREAD|
SLAB_ACCOUNT,
gfs2_init_inode_once);
if (!gfs2_inode_cachep)
goto fail_cachep3;
gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata",
sizeof(struct gfs2_bufdata),
0, 0, NULL);
if (!gfs2_bufdata_cachep)
goto fail_cachep4;
gfs2_rgrpd_cachep = kmem_cache_create("gfs2_rgrpd",
sizeof(struct gfs2_rgrpd),
0, 0, NULL);
if (!gfs2_rgrpd_cachep)
goto fail_cachep5;
gfs2_quotad_cachep = kmem_cache_create("gfs2_quotad",
sizeof(struct gfs2_quota_data),
0, 0, NULL);
if (!gfs2_quotad_cachep)
goto fail_cachep6;
gfs2_qadata_cachep = kmem_cache_create("gfs2_qadata",
sizeof(struct gfs2_qadata),
0, 0, NULL);
if (!gfs2_qadata_cachep)
goto fail_cachep7;
error = register_shrinker(&gfs2_qd_shrinker);
if (error)
goto fail_shrinker;
error = register_filesystem(&gfs2_fs_type);
if (error)
goto fail_fs1;
error = register_filesystem(&gfs2meta_fs_type);
if (error)
goto fail_fs2;
error = -ENOMEM;
gfs_recovery_wq = alloc_workqueue("gfs_recovery",
WQ_MEM_RECLAIM | WQ_FREEZABLE, 0);
if (!gfs_recovery_wq)
goto fail_wq1;
gfs2_control_wq = alloc_workqueue("gfs2_control",
WQ_UNBOUND | WQ_FREEZABLE, 0);
if (!gfs2_control_wq)
goto fail_wq2;
gfs2_freeze_wq = alloc_workqueue("freeze_workqueue", 0, 0);
if (!gfs2_freeze_wq)
goto fail_wq3;
gfs2_page_pool = mempool_create_page_pool(64, 0);
if (!gfs2_page_pool)
goto fail_mempool;
error = gfs2_register_debugfs();
if (error)
goto fail_debugfs;
pr_info("GFS2 installed\n");
return 0;
fail_debugfs:
mempool_destroy(gfs2_page_pool);
fail_mempool:
destroy_workqueue(gfs2_freeze_wq);
fail_wq3:
destroy_workqueue(gfs2_control_wq);
fail_wq2:
destroy_workqueue(gfs_recovery_wq);
fail_wq1:
unregister_filesystem(&gfs2meta_fs_type);
fail_fs2:
unregister_filesystem(&gfs2_fs_type);
fail_fs1:
unregister_shrinker(&gfs2_qd_shrinker);
fail_shrinker:
kmem_cache_destroy(gfs2_qadata_cachep);
fail_cachep7:
kmem_cache_destroy(gfs2_quotad_cachep);
fail_cachep6:
kmem_cache_destroy(gfs2_rgrpd_cachep);
fail_cachep5:
kmem_cache_destroy(gfs2_bufdata_cachep);
fail_cachep4:
kmem_cache_destroy(gfs2_inode_cachep);
fail_cachep3:
kmem_cache_destroy(gfs2_glock_aspace_cachep);
fail_cachep2:
kmem_cache_destroy(gfs2_glock_cachep);
fail_cachep1:
gfs2_glock_exit();
fail_glock:
list_lru_destroy(&gfs2_qd_lru);
fail_lru:
gfs2_sys_uninit();
return error;
}
/**
* exit_gfs2_fs - Unregister the file system
*
*/
static void __exit exit_gfs2_fs(void)
{
unregister_shrinker(&gfs2_qd_shrinker);
gfs2_glock_exit();
gfs2_unregister_debugfs();
unregister_filesystem(&gfs2_fs_type);
unregister_filesystem(&gfs2meta_fs_type);
destroy_workqueue(gfs_recovery_wq);
destroy_workqueue(gfs2_control_wq);
destroy_workqueue(gfs2_freeze_wq);
list_lru_destroy(&gfs2_qd_lru);
rcu_barrier();
mempool_destroy(gfs2_page_pool);
kmem_cache_destroy(gfs2_qadata_cachep);
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_aspace_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);
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