[people/ms/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;

	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_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_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, 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 = register_shrinker(&gfs2_qd_shrinker, "gfs2-qd");
	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_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)
{
	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_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
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)
009d8518 SW	63	{
11d8b79e	64	struct gfs2_glock_aspace *gla = foo;
009d8518	65
11d8b79e KC	66	gfs2_init_glock_once(&gla->glock);
11d8b79e KC	67	address_space_init_once(&gla->mapping);
009d8518 SW	68	}
009d8518 SW	69
b3b94faa DT	70	/**
	71	* init_gfs2_fs - Register GFS2 as a filesystem
	72	*
	73	* Returns: 0 on success, error code on failure
	74	*/
	75
	76	static int __init init_gfs2_fs(void)
	77	{
	78	int error;
	79
8d123585 SW	80	gfs2_str2qstr(&gfs2_qdot, ".");
8d123585 SW	81	gfs2_str2qstr(&gfs2_qdotdot, "..");
c754fbbb	82	gfs2_quota_hash_init();
8d123585	83
b3b94faa DT	84	error = gfs2_sys_init();
	85	if (error)
	86	return error;
	87
2147dbfd SW	88	error = list_lru_init(&gfs2_qd_lru);
	89	if (error)
	90	goto fail_lru;
	91
85d1da67 SW	92	error = gfs2_glock_init();
85d1da67 SW	93	if (error)
8b0d7f56	94	goto fail_glock;
b3b94faa	95
85d1da67	96	error = -ENOMEM;
b3b94faa DT	97	gfs2_glock_cachep = kmem_cache_create("gfs2_glock",
b3b94faa DT	98	sizeof(struct gfs2_glock),
00e8e9bc	99	0, SLAB_RECLAIM_ACCOUNT,
20c2df83	100	gfs2_init_glock_once);
b3b94faa	101	if (!gfs2_glock_cachep)
8b0d7f56	102	goto fail_cachep1;
b3b94faa	103
7c9a84a5	104	gfs2_glock_aspace_cachep = kmem_cache_create("gfs2_glock(aspace)",
11d8b79e	105	sizeof(struct gfs2_glock_aspace),
009d8518 SW	106	0, 0, gfs2_init_gl_aspace_once);
	107
	108	if (!gfs2_glock_aspace_cachep)
8b0d7f56	109	goto fail_cachep2;
009d8518	110
b3b94faa DT	111	gfs2_inode_cachep = kmem_cache_create("gfs2_inode",
b3b94faa DT	112	sizeof(struct gfs2_inode),
eb1dc33a	113	0, SLAB_RECLAIM_ACCOUNT\|
5d097056 VD	114	SLAB_MEM_SPREAD\|
5d097056 VD	115	SLAB_ACCOUNT,
20c2df83	116	gfs2_init_inode_once);
b3b94faa	117	if (!gfs2_inode_cachep)
8b0d7f56	118	goto fail_cachep3;
b3b94faa DT	119
	120	gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata",
	121	sizeof(struct gfs2_bufdata),
20c2df83	122	0, 0, NULL);
b3b94faa	123	if (!gfs2_bufdata_cachep)
8b0d7f56	124	goto fail_cachep4;
b3b94faa	125
6bdd9be6 BP	126	gfs2_rgrpd_cachep = kmem_cache_create("gfs2_rgrpd",
	127	sizeof(struct gfs2_rgrpd),
	128	0, 0, NULL);
	129	if (!gfs2_rgrpd_cachep)
8b0d7f56	130	goto fail_cachep5;
6bdd9be6	131
37b2c837 SW	132	gfs2_quotad_cachep = kmem_cache_create("gfs2_quotad",
37b2c837 SW	133	sizeof(struct gfs2_quota_data),
00e8e9bc	134	0, SLAB_RECLAIM_ACCOUNT, NULL);
37b2c837	135	if (!gfs2_quotad_cachep)
8b0d7f56	136	goto fail_cachep6;
37b2c837	137
b54e9a0b BP	138	gfs2_qadata_cachep = kmem_cache_create("gfs2_qadata",
	139	sizeof(struct gfs2_qadata),
	140	0, 0, NULL);
	141	if (!gfs2_qadata_cachep)
8b0d7f56	142	goto fail_cachep7;
b54e9a0b	143
b839dada BP	144	gfs2_trans_cachep = kmem_cache_create("gfs2_trans",
	145	sizeof(struct gfs2_trans),
	146	0, 0, NULL);
	147	if (!gfs2_trans_cachep)
	148	goto fail_cachep8;
	149
e33c267a	150	error = register_shrinker(&gfs2_qd_shrinker, "gfs2-qd");
e0d735c1	151	if (error)
8b0d7f56	152	goto fail_shrinker;
0a7ab79c	153
b3b94faa DT	154	error = register_filesystem(&gfs2_fs_type);
b3b94faa DT	155	if (error)
8b0d7f56	156	goto fail_fs1;
b3b94faa	157
419c93e0 SW	158	error = register_filesystem(&gfs2meta_fs_type);
419c93e0 SW	159	if (error)
8b0d7f56	160	goto fail_fs2;
419c93e0	161
6ecd7c2d TH	162	error = -ENOMEM;
6ecd7c2d TH	163	gfs_recovery_wq = alloc_workqueue("gfs_recovery",
58a69cb4	164	WQ_MEM_RECLAIM \| WQ_FREEZABLE, 0);
6ecd7c2d	165	if (!gfs_recovery_wq)
8b0d7f56	166	goto fail_wq1;
fe64d517	167
e0c2a9aa	168	gfs2_control_wq = alloc_workqueue("gfs2_control",
d08fa65a	169	WQ_UNBOUND \| WQ_FREEZABLE, 0);
e0c2a9aa	170	if (!gfs2_control_wq)
8b0d7f56	171	goto fail_wq2;
75ca61c1	172
2e60d768 BM	173	gfs2_freeze_wq = alloc_workqueue("freeze_workqueue", 0, 0);
	174
	175	if (!gfs2_freeze_wq)
8b0d7f56	176	goto fail_wq3;
2e60d768	177
e8c92ed7 SW	178	gfs2_page_pool = mempool_create_page_pool(64, 0);
e8c92ed7 SW	179	if (!gfs2_page_pool)
8b0d7f56	180	goto fail_mempool;
e0c2a9aa	181
2abbf9a4	182	gfs2_register_debugfs();
7c52b166	183
fc554ed3	184	pr_info("GFS2 installed\n");
b3b94faa DT	185
	186	return 0;
	187
8b0d7f56	188	fail_mempool:
2e60d768	189	destroy_workqueue(gfs2_freeze_wq);
8b0d7f56	190	fail_wq3:
75ca61c1	191	destroy_workqueue(gfs2_control_wq);
8b0d7f56	192	fail_wq2:
e0c2a9aa	193	destroy_workqueue(gfs_recovery_wq);
8b0d7f56	194	fail_wq1:
fe64d517	195	unregister_filesystem(&gfs2meta_fs_type);
8b0d7f56	196	fail_fs2:
419c93e0	197	unregister_filesystem(&gfs2_fs_type);
8b0d7f56	198	fail_fs1:
2147dbfd	199	unregister_shrinker(&gfs2_qd_shrinker);
8b0d7f56	200	fail_shrinker:
b839dada BP	201	kmem_cache_destroy(gfs2_trans_cachep);
b839dada BP	202	fail_cachep8:
8b0d7f56 TH	203	kmem_cache_destroy(gfs2_qadata_cachep);
	204	fail_cachep7:
	205	kmem_cache_destroy(gfs2_quotad_cachep);
	206	fail_cachep6:
	207	kmem_cache_destroy(gfs2_rgrpd_cachep);
	208	fail_cachep5:
	209	kmem_cache_destroy(gfs2_bufdata_cachep);
	210	fail_cachep4:
	211	kmem_cache_destroy(gfs2_inode_cachep);
	212	fail_cachep3:
	213	kmem_cache_destroy(gfs2_glock_aspace_cachep);
	214	fail_cachep2:
	215	kmem_cache_destroy(gfs2_glock_cachep);
	216	fail_cachep1:
8fbbfd21	217	gfs2_glock_exit();
8b0d7f56 TH	218	fail_glock:
	219	list_lru_destroy(&gfs2_qd_lru);
	220	fail_lru:
b3b94faa DT	221	gfs2_sys_uninit();
	222	return error;
	223	}
	224
	225	/**
	226	* exit_gfs2_fs - Unregister the file system
	227	*
	228	*/
	229
	230	static void __exit exit_gfs2_fs(void)
	231	{
2147dbfd	232	unregister_shrinker(&gfs2_qd_shrinker);
8fbbfd21	233	gfs2_glock_exit();
7c52b166	234	gfs2_unregister_debugfs();
b3b94faa	235	unregister_filesystem(&gfs2_fs_type);
419c93e0	236	unregister_filesystem(&gfs2meta_fs_type);
6ecd7c2d	237	destroy_workqueue(gfs_recovery_wq);
e0c2a9aa	238	destroy_workqueue(gfs2_control_wq);
2e60d768	239	destroy_workqueue(gfs2_freeze_wq);
2147dbfd	240	list_lru_destroy(&gfs2_qd_lru);
b3b94faa	241
bc015cb8 SW	242	rcu_barrier();
bc015cb8 SW	243
e8c92ed7	244	mempool_destroy(gfs2_page_pool);
b839dada	245	kmem_cache_destroy(gfs2_trans_cachep);
b54e9a0b	246	kmem_cache_destroy(gfs2_qadata_cachep);
37b2c837	247	kmem_cache_destroy(gfs2_quotad_cachep);
6bdd9be6	248	kmem_cache_destroy(gfs2_rgrpd_cachep);
b3b94faa DT	249	kmem_cache_destroy(gfs2_bufdata_cachep);
b3b94faa DT	250	kmem_cache_destroy(gfs2_inode_cachep);
009d8518	251	kmem_cache_destroy(gfs2_glock_aspace_cachep);
b3b94faa DT	252	kmem_cache_destroy(gfs2_glock_cachep);
	253
	254	gfs2_sys_uninit();
	255	}
	256
	257	MODULE_DESCRIPTION("Global File System");
	258	MODULE_AUTHOR("Red Hat, Inc.");
	259	MODULE_LICENSE("GPL");
	260
	261	module_init(init_gfs2_fs);
	262	module_exit(exit_gfs2_fs);
	263