[linux.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_ordered);
	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;

	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_aspace *gla = foo;

	gfs2_init_glock_once(&gla->glock);
	address_space_init_once(&gla->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, SLAB_RECLAIM_ACCOUNT,
					      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_aspace),
					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_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, SLAB_RECLAIM_ACCOUNT, 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;

	gfs2_trans_cachep = kmem_cache_create("gfs2_trans",
					       sizeof(struct gfs2_trans),
					       0, 0, NULL);
	if (!gfs2_trans_cachep)
		goto fail_cachep8;

	error = gfs2_qd_shrinker_init();
	if (error)
		goto fail_shrinker;

	error = -ENOMEM;
	gfs2_recovery_wq = alloc_workqueue("gfs2_recovery",
					  WQ_MEM_RECLAIM | WQ_FREEZABLE, 0);
	if (!gfs2_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("gfs2_freeze", 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();
	error = register_filesystem(&gfs2_fs_type);
	if (error)
		goto fail_fs1;

	error = register_filesystem(&gfs2meta_fs_type);
	if (error)
		goto fail_fs2;


	pr_info("GFS2 installed\n");

	return 0;

fail_fs2:
	unregister_filesystem(&gfs2_fs_type);
fail_fs1:
	mempool_destroy(gfs2_page_pool);
fail_mempool:
	destroy_workqueue(gfs2_freeze_wq);
fail_wq3:
	destroy_workqueue(gfs2_control_wq);
fail_wq2:
	destroy_workqueue(gfs2_recovery_wq);
fail_wq1:
	gfs2_qd_shrinker_exit();
fail_shrinker:
	kmem_cache_destroy(gfs2_trans_cachep);
fail_cachep8:
	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)
{
	gfs2_qd_shrinker_exit();
	gfs2_glock_exit();
	gfs2_unregister_debugfs();
	unregister_filesystem(&gfs2_fs_type);
	unregister_filesystem(&gfs2meta_fs_type);
	destroy_workqueue(gfs2_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_trans_cachep);
	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);
7542486b	41	INIT_LIST_HEAD(&ip->i_ordered);
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
a35afb83	54	INIT_LIST_HEAD(&gl->gl_holders);
97cc1025	55	INIT_LIST_HEAD(&gl->gl_lru);
a35afb83 CL	56	INIT_LIST_HEAD(&gl->gl_ail_list);
a35afb83 CL	57	atomic_set(&gl->gl_ail_count, 0);
638803d4	58	atomic_set(&gl->gl_revokes, 0);
ec45d9f5 SW	59	}
ec45d9f5 SW	60
009d8518 SW	61	static void gfs2_init_gl_aspace_once(void *foo)
009d8518 SW	62	{
11d8b79e	63	struct gfs2_glock_aspace *gla = foo;
009d8518	64
11d8b79e KC	65	gfs2_init_glock_once(&gla->glock);
11d8b79e KC	66	address_space_init_once(&gla->mapping);
009d8518 SW	67	}
009d8518 SW	68
b3b94faa DT	69	/**
	70	* init_gfs2_fs - Register GFS2 as a filesystem
	71	*
	72	* Returns: 0 on success, error code on failure
	73	*/
	74
	75	static int __init init_gfs2_fs(void)
	76	{
	77	int error;
	78
8d123585 SW	79	gfs2_str2qstr(&gfs2_qdot, ".");
8d123585 SW	80	gfs2_str2qstr(&gfs2_qdotdot, "..");
c754fbbb	81	gfs2_quota_hash_init();
8d123585	82
b3b94faa DT	83	error = gfs2_sys_init();
	84	if (error)
	85	return error;
	86
2147dbfd SW	87	error = list_lru_init(&gfs2_qd_lru);
	88	if (error)
	89	goto fail_lru;
	90
85d1da67 SW	91	error = gfs2_glock_init();
85d1da67 SW	92	if (error)
8b0d7f56	93	goto fail_glock;
b3b94faa	94
85d1da67	95	error = -ENOMEM;
b3b94faa DT	96	gfs2_glock_cachep = kmem_cache_create("gfs2_glock",
b3b94faa DT	97	sizeof(struct gfs2_glock),
00e8e9bc	98	0, SLAB_RECLAIM_ACCOUNT,
20c2df83	99	gfs2_init_glock_once);
b3b94faa	100	if (!gfs2_glock_cachep)
8b0d7f56	101	goto fail_cachep1;
b3b94faa	102
7c9a84a5	103	gfs2_glock_aspace_cachep = kmem_cache_create("gfs2_glock(aspace)",
11d8b79e	104	sizeof(struct gfs2_glock_aspace),
009d8518 SW	105	0, 0, gfs2_init_gl_aspace_once);
	106
	107	if (!gfs2_glock_aspace_cachep)
8b0d7f56	108	goto fail_cachep2;
009d8518	109
b3b94faa DT	110	gfs2_inode_cachep = kmem_cache_create("gfs2_inode",
b3b94faa DT	111	sizeof(struct gfs2_inode),
eb1dc33a	112	0, SLAB_RECLAIM_ACCOUNT\|
5d097056	113	SLAB_ACCOUNT,
20c2df83	114	gfs2_init_inode_once);
b3b94faa	115	if (!gfs2_inode_cachep)
8b0d7f56	116	goto fail_cachep3;
b3b94faa DT	117
	118	gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata",
	119	sizeof(struct gfs2_bufdata),
20c2df83	120	0, 0, NULL);
b3b94faa	121	if (!gfs2_bufdata_cachep)
8b0d7f56	122	goto fail_cachep4;
b3b94faa	123
6bdd9be6 BP	124	gfs2_rgrpd_cachep = kmem_cache_create("gfs2_rgrpd",
	125	sizeof(struct gfs2_rgrpd),
	126	0, 0, NULL);
	127	if (!gfs2_rgrpd_cachep)
8b0d7f56	128	goto fail_cachep5;
6bdd9be6	129
37b2c837 SW	130	gfs2_quotad_cachep = kmem_cache_create("gfs2_quotad",
37b2c837 SW	131	sizeof(struct gfs2_quota_data),
00e8e9bc	132	0, SLAB_RECLAIM_ACCOUNT, NULL);
37b2c837	133	if (!gfs2_quotad_cachep)
8b0d7f56	134	goto fail_cachep6;
37b2c837	135
b54e9a0b BP	136	gfs2_qadata_cachep = kmem_cache_create("gfs2_qadata",
	137	sizeof(struct gfs2_qadata),
	138	0, 0, NULL);
	139	if (!gfs2_qadata_cachep)
8b0d7f56	140	goto fail_cachep7;
b54e9a0b	141
b839dada BP	142	gfs2_trans_cachep = kmem_cache_create("gfs2_trans",
	143	sizeof(struct gfs2_trans),
	144	0, 0, NULL);
	145	if (!gfs2_trans_cachep)
	146	goto fail_cachep8;
	147
8ee0fd9c	148	error = gfs2_qd_shrinker_init();
e0d735c1	149	if (error)
8b0d7f56	150	goto fail_shrinker;
0a7ab79c	151
6ecd7c2d	152	error = -ENOMEM;
5c0dc371	153	gfs2_recovery_wq = alloc_workqueue("gfs2_recovery",
58a69cb4	154	WQ_MEM_RECLAIM \| WQ_FREEZABLE, 0);
5c0dc371	155	if (!gfs2_recovery_wq)
8b0d7f56	156	goto fail_wq1;
fe64d517	157
e0c2a9aa	158	gfs2_control_wq = alloc_workqueue("gfs2_control",
d08fa65a	159	WQ_UNBOUND \| WQ_FREEZABLE, 0);
e0c2a9aa	160	if (!gfs2_control_wq)
8b0d7f56	161	goto fail_wq2;
75ca61c1	162
ab8eecf5	163	gfs2_freeze_wq = alloc_workqueue("gfs2_freeze", 0, 0);
2e60d768 BM	164
2e60d768 BM	165	if (!gfs2_freeze_wq)
8b0d7f56	166	goto fail_wq3;
2e60d768	167
e8c92ed7 SW	168	gfs2_page_pool = mempool_create_page_pool(64, 0);
e8c92ed7 SW	169	if (!gfs2_page_pool)
8b0d7f56	170	goto fail_mempool;
e0c2a9aa	171
2abbf9a4	172	gfs2_register_debugfs();
74b1b10e BP	173	error = register_filesystem(&gfs2_fs_type);
	174	if (error)
	175	goto fail_fs1;
	176
	177	error = register_filesystem(&gfs2meta_fs_type);
	178	if (error)
	179	goto fail_fs2;
	180
7c52b166	181
fc554ed3	182	pr_info("GFS2 installed\n");
b3b94faa DT	183
	184	return 0;
	185
74b1b10e BP	186	fail_fs2:
	187	unregister_filesystem(&gfs2_fs_type);
	188	fail_fs1:
	189	mempool_destroy(gfs2_page_pool);
8b0d7f56	190	fail_mempool:
2e60d768	191	destroy_workqueue(gfs2_freeze_wq);
8b0d7f56	192	fail_wq3:
75ca61c1	193	destroy_workqueue(gfs2_control_wq);
8b0d7f56	194	fail_wq2:
5c0dc371	195	destroy_workqueue(gfs2_recovery_wq);
8b0d7f56	196	fail_wq1:
8ee0fd9c	197	gfs2_qd_shrinker_exit();
8b0d7f56	198	fail_shrinker:
b839dada BP	199	kmem_cache_destroy(gfs2_trans_cachep);
b839dada BP	200	fail_cachep8:
8b0d7f56 TH	201	kmem_cache_destroy(gfs2_qadata_cachep);
	202	fail_cachep7:
	203	kmem_cache_destroy(gfs2_quotad_cachep);
	204	fail_cachep6:
	205	kmem_cache_destroy(gfs2_rgrpd_cachep);
	206	fail_cachep5:
	207	kmem_cache_destroy(gfs2_bufdata_cachep);
	208	fail_cachep4:
	209	kmem_cache_destroy(gfs2_inode_cachep);
	210	fail_cachep3:
	211	kmem_cache_destroy(gfs2_glock_aspace_cachep);
	212	fail_cachep2:
	213	kmem_cache_destroy(gfs2_glock_cachep);
	214	fail_cachep1:
8fbbfd21	215	gfs2_glock_exit();
8b0d7f56 TH	216	fail_glock:
	217	list_lru_destroy(&gfs2_qd_lru);
	218	fail_lru:
b3b94faa DT	219	gfs2_sys_uninit();
	220	return error;
	221	}
	222
	223	/**
	224	* exit_gfs2_fs - Unregister the file system
	225	*
	226	*/
	227
	228	static void __exit exit_gfs2_fs(void)
	229	{
8ee0fd9c	230	gfs2_qd_shrinker_exit();
8fbbfd21	231	gfs2_glock_exit();
7c52b166	232	gfs2_unregister_debugfs();
b3b94faa	233	unregister_filesystem(&gfs2_fs_type);
419c93e0	234	unregister_filesystem(&gfs2meta_fs_type);
5c0dc371	235	destroy_workqueue(gfs2_recovery_wq);
e0c2a9aa	236	destroy_workqueue(gfs2_control_wq);
2e60d768	237	destroy_workqueue(gfs2_freeze_wq);
2147dbfd	238	list_lru_destroy(&gfs2_qd_lru);
b3b94faa	239
bc015cb8 SW	240	rcu_barrier();
bc015cb8 SW	241
e8c92ed7	242	mempool_destroy(gfs2_page_pool);
b839dada	243	kmem_cache_destroy(gfs2_trans_cachep);
b54e9a0b	244	kmem_cache_destroy(gfs2_qadata_cachep);
37b2c837	245	kmem_cache_destroy(gfs2_quotad_cachep);
6bdd9be6	246	kmem_cache_destroy(gfs2_rgrpd_cachep);
b3b94faa DT	247	kmem_cache_destroy(gfs2_bufdata_cachep);
b3b94faa DT	248	kmem_cache_destroy(gfs2_inode_cachep);
009d8518	249	kmem_cache_destroy(gfs2_glock_aspace_cachep);
b3b94faa DT	250	kmem_cache_destroy(gfs2_glock_cachep);
	251
	252	gfs2_sys_uninit();
	253	}
	254
	255	MODULE_DESCRIPTION("Global File System");
	256	MODULE_AUTHOR("Red Hat, Inc.");
	257	MODULE_LICENSE("GPL");
	258
	259	module_init(init_gfs2_fs);
	260	module_exit(exit_gfs2_fs);
	261