[linux-2.6-block.git] / fs / gfs2 / main.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
 * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
 */

#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;

	gfs2_register_debugfs();

	pr_info("GFS2 installed\n");

	return 0;

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);
Commit	Line	Data
7336d0e6	1	// SPDX-License-Identifier: GPL-2.0-only
b3b94faa DT	2	/*
b3b94faa DT	3	* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3a8a9a10	4	* Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
b3b94faa DT	5	*/
b3b94faa DT	6
d77d1b58 JP	7	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
d77d1b58 JP	8
b3b94faa DT	9	#include <linux/slab.h>
	10	#include <linux/spinlock.h>
	11	#include <linux/completion.h>
	12	#include <linux/buffer_head.h>
	13	#include <linux/module.h>
	14	#include <linux/init.h>
5c676f6d	15	#include <linux/gfs2_ondisk.h>
bc015cb8 SW	16	#include <linux/rcupdate.h>
bc015cb8 SW	17	#include <linux/rculist_bl.h>
60063497	18	#include <linux/atomic.h>
75ca61c1	19	#include <linux/mempool.h>
b3b94faa DT	20
b3b94faa DT	21	#include "gfs2.h"
5c676f6d	22	#include "incore.h"
b2760583	23	#include "super.h"
b3b94faa	24	#include "sys.h"
5c676f6d	25	#include "util.h"
85d1da67	26	#include "glock.h"
0a7ab79c	27	#include "quota.h"
6ecd7c2d	28	#include "recovery.h"
8d123585	29	#include "dir.h"
2e60d768	30	#include "glops.h"
0a7ab79c	31
e0c2a9aa DT	32	struct workqueue_struct *gfs2_control_wq;
e0c2a9aa DT	33
51cc5068	34	static void gfs2_init_inode_once(void *foo)
320dd101 SW	35	{
320dd101 SW	36	struct gfs2_inode *ip = foo;
a35afb83 CL	37
a35afb83 CL	38	inode_init_once(&ip->i_inode);
21f09c43	39	atomic_set(&ip->i_sizehint, 0);
a35afb83	40	init_rwsem(&ip->i_rw_mutex);
813e0c46	41	INIT_LIST_HEAD(&ip->i_trunc_list);
b54e9a0b	42	ip->i_qadata = NULL;
21f09c43	43	gfs2_holder_mark_uninitialized(&ip->i_rgd_gh);
a097dc7e BP	44	memset(&ip->i_res, 0, sizeof(ip->i_res));
a097dc7e BP	45	RB_CLEAR_NODE(&ip->i_res.rs_node);
17d539f0	46	ip->i_hash_cache = NULL;
6df9f9a2	47	gfs2_holder_mark_uninitialized(&ip->i_iopen_gh);
320dd101 SW	48	}
320dd101 SW	49
51cc5068	50	static void gfs2_init_glock_once(void *foo)
ec45d9f5 SW	51	{
ec45d9f5 SW	52	struct gfs2_glock *gl = foo;
a35afb83	53
f3dd1649	54	spin_lock_init(&gl->gl_lockref.lock);
a35afb83	55	INIT_LIST_HEAD(&gl->gl_holders);
97cc1025	56	INIT_LIST_HEAD(&gl->gl_lru);
a35afb83 CL	57	INIT_LIST_HEAD(&gl->gl_ail_list);
a35afb83 CL	58	atomic_set(&gl->gl_ail_count, 0);
638803d4	59	atomic_set(&gl->gl_revokes, 0);
ec45d9f5 SW	60	}
ec45d9f5 SW	61
009d8518 SW	62	static void gfs2_init_gl_aspace_once(void *foo)
	63	{
	64	struct gfs2_glock *gl = foo;
	65	struct address_space mapping = (struct address_space )(gl + 1);
	66
	67	gfs2_init_glock_once(gl);
2aa15890	68	address_space_init_once(mapping);
009d8518 SW	69	}
009d8518 SW	70
b3b94faa DT	71	/**
	72	* init_gfs2_fs - Register GFS2 as a filesystem
	73	*
	74	* Returns: 0 on success, error code on failure
	75	*/
	76
	77	static int __init init_gfs2_fs(void)
	78	{
	79	int error;
	80
8d123585 SW	81	gfs2_str2qstr(&gfs2_qdot, ".");
8d123585 SW	82	gfs2_str2qstr(&gfs2_qdotdot, "..");
c754fbbb	83	gfs2_quota_hash_init();
8d123585	84
b3b94faa DT	85	error = gfs2_sys_init();
	86	if (error)
	87	return error;
	88
2147dbfd SW	89	error = list_lru_init(&gfs2_qd_lru);
	90	if (error)
	91	goto fail_lru;
	92
85d1da67 SW	93	error = gfs2_glock_init();
85d1da67 SW	94	if (error)
8b0d7f56	95	goto fail_glock;
b3b94faa	96
85d1da67	97	error = -ENOMEM;
b3b94faa DT	98	gfs2_glock_cachep = kmem_cache_create("gfs2_glock",
b3b94faa DT	99	sizeof(struct gfs2_glock),
907b9bce	100	0, 0,
20c2df83	101	gfs2_init_glock_once);
b3b94faa	102	if (!gfs2_glock_cachep)
8b0d7f56	103	goto fail_cachep1;
b3b94faa	104
7c9a84a5	105	gfs2_glock_aspace_cachep = kmem_cache_create("gfs2_glock(aspace)",
009d8518 SW	106	sizeof(struct gfs2_glock) +
	107	sizeof(struct address_space),
	108	0, 0, gfs2_init_gl_aspace_once);
	109
	110	if (!gfs2_glock_aspace_cachep)
8b0d7f56	111	goto fail_cachep2;
009d8518	112
b3b94faa DT	113	gfs2_inode_cachep = kmem_cache_create("gfs2_inode",
b3b94faa DT	114	sizeof(struct gfs2_inode),
eb1dc33a	115	0, SLAB_RECLAIM_ACCOUNT\|
5d097056 VD	116	SLAB_MEM_SPREAD\|
5d097056 VD	117	SLAB_ACCOUNT,
20c2df83	118	gfs2_init_inode_once);
b3b94faa	119	if (!gfs2_inode_cachep)
8b0d7f56	120	goto fail_cachep3;
b3b94faa DT	121
	122	gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata",
	123	sizeof(struct gfs2_bufdata),
20c2df83	124	0, 0, NULL);
b3b94faa	125	if (!gfs2_bufdata_cachep)
8b0d7f56	126	goto fail_cachep4;
b3b94faa	127
6bdd9be6 BP	128	gfs2_rgrpd_cachep = kmem_cache_create("gfs2_rgrpd",
	129	sizeof(struct gfs2_rgrpd),
	130	0, 0, NULL);
	131	if (!gfs2_rgrpd_cachep)
8b0d7f56	132	goto fail_cachep5;
6bdd9be6	133
37b2c837 SW	134	gfs2_quotad_cachep = kmem_cache_create("gfs2_quotad",
	135	sizeof(struct gfs2_quota_data),
	136	0, 0, NULL);
	137	if (!gfs2_quotad_cachep)
8b0d7f56	138	goto fail_cachep6;
37b2c837	139
b54e9a0b BP	140	gfs2_qadata_cachep = kmem_cache_create("gfs2_qadata",
	141	sizeof(struct gfs2_qadata),
	142	0, 0, NULL);
	143	if (!gfs2_qadata_cachep)
8b0d7f56	144	goto fail_cachep7;
b54e9a0b	145
e0d735c1 CY	146	error = register_shrinker(&gfs2_qd_shrinker);
e0d735c1 CY	147	if (error)
8b0d7f56	148	goto fail_shrinker;
0a7ab79c	149
b3b94faa DT	150	error = register_filesystem(&gfs2_fs_type);
b3b94faa DT	151	if (error)
8b0d7f56	152	goto fail_fs1;
b3b94faa	153
419c93e0 SW	154	error = register_filesystem(&gfs2meta_fs_type);
419c93e0 SW	155	if (error)
8b0d7f56	156	goto fail_fs2;
419c93e0	157
6ecd7c2d TH	158	error = -ENOMEM;
6ecd7c2d TH	159	gfs_recovery_wq = alloc_workqueue("gfs_recovery",
58a69cb4	160	WQ_MEM_RECLAIM \| WQ_FREEZABLE, 0);
6ecd7c2d	161	if (!gfs_recovery_wq)
8b0d7f56	162	goto fail_wq1;
fe64d517	163
e0c2a9aa	164	gfs2_control_wq = alloc_workqueue("gfs2_control",
d08fa65a	165	WQ_UNBOUND \| WQ_FREEZABLE, 0);
e0c2a9aa	166	if (!gfs2_control_wq)
8b0d7f56	167	goto fail_wq2;
75ca61c1	168
2e60d768 BM	169	gfs2_freeze_wq = alloc_workqueue("freeze_workqueue", 0, 0);
	170
	171	if (!gfs2_freeze_wq)
8b0d7f56	172	goto fail_wq3;
2e60d768	173
e8c92ed7 SW	174	gfs2_page_pool = mempool_create_page_pool(64, 0);
e8c92ed7 SW	175	if (!gfs2_page_pool)
8b0d7f56	176	goto fail_mempool;
e0c2a9aa	177
2abbf9a4	178	gfs2_register_debugfs();
7c52b166	179
fc554ed3	180	pr_info("GFS2 installed\n");
b3b94faa DT	181
	182	return 0;
	183
8b0d7f56	184	fail_mempool:
2e60d768	185	destroy_workqueue(gfs2_freeze_wq);
8b0d7f56	186	fail_wq3:
75ca61c1	187	destroy_workqueue(gfs2_control_wq);
8b0d7f56	188	fail_wq2:
e0c2a9aa	189	destroy_workqueue(gfs_recovery_wq);
8b0d7f56	190	fail_wq1:
fe64d517	191	unregister_filesystem(&gfs2meta_fs_type);
8b0d7f56	192	fail_fs2:
419c93e0	193	unregister_filesystem(&gfs2_fs_type);
8b0d7f56	194	fail_fs1:
2147dbfd	195	unregister_shrinker(&gfs2_qd_shrinker);
8b0d7f56 TH	196	fail_shrinker:
	197	kmem_cache_destroy(gfs2_qadata_cachep);
	198	fail_cachep7:
	199	kmem_cache_destroy(gfs2_quotad_cachep);
	200	fail_cachep6:
	201	kmem_cache_destroy(gfs2_rgrpd_cachep);
	202	fail_cachep5:
	203	kmem_cache_destroy(gfs2_bufdata_cachep);
	204	fail_cachep4:
	205	kmem_cache_destroy(gfs2_inode_cachep);
	206	fail_cachep3:
	207	kmem_cache_destroy(gfs2_glock_aspace_cachep);
	208	fail_cachep2:
	209	kmem_cache_destroy(gfs2_glock_cachep);
	210	fail_cachep1:
8fbbfd21	211	gfs2_glock_exit();
8b0d7f56 TH	212	fail_glock:
	213	list_lru_destroy(&gfs2_qd_lru);
	214	fail_lru:
b3b94faa DT	215	gfs2_sys_uninit();
	216	return error;
	217	}
	218
	219	/**
	220	* exit_gfs2_fs - Unregister the file system
	221	*
	222	*/
	223
	224	static void __exit exit_gfs2_fs(void)
	225	{
2147dbfd	226	unregister_shrinker(&gfs2_qd_shrinker);
8fbbfd21	227	gfs2_glock_exit();
7c52b166	228	gfs2_unregister_debugfs();
b3b94faa	229	unregister_filesystem(&gfs2_fs_type);
419c93e0	230	unregister_filesystem(&gfs2meta_fs_type);
6ecd7c2d	231	destroy_workqueue(gfs_recovery_wq);
e0c2a9aa	232	destroy_workqueue(gfs2_control_wq);
2e60d768	233	destroy_workqueue(gfs2_freeze_wq);
2147dbfd	234	list_lru_destroy(&gfs2_qd_lru);
b3b94faa	235
bc015cb8 SW	236	rcu_barrier();
bc015cb8 SW	237
e8c92ed7	238	mempool_destroy(gfs2_page_pool);
b54e9a0b	239	kmem_cache_destroy(gfs2_qadata_cachep);
37b2c837	240	kmem_cache_destroy(gfs2_quotad_cachep);
6bdd9be6	241	kmem_cache_destroy(gfs2_rgrpd_cachep);
b3b94faa DT	242	kmem_cache_destroy(gfs2_bufdata_cachep);
b3b94faa DT	243	kmem_cache_destroy(gfs2_inode_cachep);
009d8518	244	kmem_cache_destroy(gfs2_glock_aspace_cachep);
b3b94faa DT	245	kmem_cache_destroy(gfs2_glock_cachep);
	246
	247	gfs2_sys_uninit();
	248	}
	249
	250	MODULE_DESCRIPTION("Global File System");
	251	MODULE_AUTHOR("Red Hat, Inc.");
	252	MODULE_LICENSE("GPL");
	253
	254	module_init(init_gfs2_fs);
	255	module_exit(exit_gfs2_fs);
	256