main.c (6288B)
1// SPDX-License-Identifier: GPL-2.0-only 2/* 3 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. 4 * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. 5 */ 6 7#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 8 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> 15#include <linux/gfs2_ondisk.h> 16#include <linux/rcupdate.h> 17#include <linux/rculist_bl.h> 18#include <linux/atomic.h> 19#include <linux/mempool.h> 20 21#include "gfs2.h" 22#include "incore.h" 23#include "super.h" 24#include "sys.h" 25#include "util.h" 26#include "glock.h" 27#include "quota.h" 28#include "recovery.h" 29#include "dir.h" 30#include "glops.h" 31 32struct workqueue_struct *gfs2_control_wq; 33 34static void gfs2_init_inode_once(void *foo) 35{ 36 struct gfs2_inode *ip = foo; 37 38 inode_init_once(&ip->i_inode); 39 atomic_set(&ip->i_sizehint, 0); 40 init_rwsem(&ip->i_rw_mutex); 41 INIT_LIST_HEAD(&ip->i_trunc_list); 42 INIT_LIST_HEAD(&ip->i_ordered); 43 ip->i_qadata = NULL; 44 gfs2_holder_mark_uninitialized(&ip->i_rgd_gh); 45 memset(&ip->i_res, 0, sizeof(ip->i_res)); 46 RB_CLEAR_NODE(&ip->i_res.rs_node); 47 ip->i_hash_cache = NULL; 48 gfs2_holder_mark_uninitialized(&ip->i_iopen_gh); 49} 50 51static void gfs2_init_glock_once(void *foo) 52{ 53 struct gfs2_glock *gl = foo; 54 55 spin_lock_init(&gl->gl_lockref.lock); 56 INIT_LIST_HEAD(&gl->gl_holders); 57 INIT_LIST_HEAD(&gl->gl_lru); 58 INIT_LIST_HEAD(&gl->gl_ail_list); 59 atomic_set(&gl->gl_ail_count, 0); 60 atomic_set(&gl->gl_revokes, 0); 61} 62 63static void gfs2_init_gl_aspace_once(void *foo) 64{ 65 struct gfs2_glock_aspace *gla = foo; 66 67 gfs2_init_glock_once(&gla->glock); 68 address_space_init_once(&gla->mapping); 69} 70 71/** 72 * init_gfs2_fs - Register GFS2 as a filesystem 73 * 74 * Returns: 0 on success, error code on failure 75 */ 76 77static int __init init_gfs2_fs(void) 78{ 79 int error; 80 81 gfs2_str2qstr(&gfs2_qdot, "."); 82 gfs2_str2qstr(&gfs2_qdotdot, ".."); 83 gfs2_quota_hash_init(); 84 85 error = gfs2_sys_init(); 86 if (error) 87 return error; 88 89 error = list_lru_init(&gfs2_qd_lru); 90 if (error) 91 goto fail_lru; 92 93 error = gfs2_glock_init(); 94 if (error) 95 goto fail_glock; 96 97 error = -ENOMEM; 98 gfs2_glock_cachep = kmem_cache_create("gfs2_glock", 99 sizeof(struct gfs2_glock), 100 0, SLAB_RECLAIM_ACCOUNT, 101 gfs2_init_glock_once); 102 if (!gfs2_glock_cachep) 103 goto fail_cachep1; 104 105 gfs2_glock_aspace_cachep = kmem_cache_create("gfs2_glock(aspace)", 106 sizeof(struct gfs2_glock_aspace), 107 0, 0, gfs2_init_gl_aspace_once); 108 109 if (!gfs2_glock_aspace_cachep) 110 goto fail_cachep2; 111 112 gfs2_inode_cachep = kmem_cache_create("gfs2_inode", 113 sizeof(struct gfs2_inode), 114 0, SLAB_RECLAIM_ACCOUNT| 115 SLAB_MEM_SPREAD| 116 SLAB_ACCOUNT, 117 gfs2_init_inode_once); 118 if (!gfs2_inode_cachep) 119 goto fail_cachep3; 120 121 gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata", 122 sizeof(struct gfs2_bufdata), 123 0, 0, NULL); 124 if (!gfs2_bufdata_cachep) 125 goto fail_cachep4; 126 127 gfs2_rgrpd_cachep = kmem_cache_create("gfs2_rgrpd", 128 sizeof(struct gfs2_rgrpd), 129 0, 0, NULL); 130 if (!gfs2_rgrpd_cachep) 131 goto fail_cachep5; 132 133 gfs2_quotad_cachep = kmem_cache_create("gfs2_quotad", 134 sizeof(struct gfs2_quota_data), 135 0, SLAB_RECLAIM_ACCOUNT, NULL); 136 if (!gfs2_quotad_cachep) 137 goto fail_cachep6; 138 139 gfs2_qadata_cachep = kmem_cache_create("gfs2_qadata", 140 sizeof(struct gfs2_qadata), 141 0, 0, NULL); 142 if (!gfs2_qadata_cachep) 143 goto fail_cachep7; 144 145 gfs2_trans_cachep = kmem_cache_create("gfs2_trans", 146 sizeof(struct gfs2_trans), 147 0, 0, NULL); 148 if (!gfs2_trans_cachep) 149 goto fail_cachep8; 150 151 error = register_shrinker(&gfs2_qd_shrinker); 152 if (error) 153 goto fail_shrinker; 154 155 error = register_filesystem(&gfs2_fs_type); 156 if (error) 157 goto fail_fs1; 158 159 error = register_filesystem(&gfs2meta_fs_type); 160 if (error) 161 goto fail_fs2; 162 163 error = -ENOMEM; 164 gfs_recovery_wq = alloc_workqueue("gfs_recovery", 165 WQ_MEM_RECLAIM | WQ_FREEZABLE, 0); 166 if (!gfs_recovery_wq) 167 goto fail_wq1; 168 169 gfs2_control_wq = alloc_workqueue("gfs2_control", 170 WQ_UNBOUND | WQ_FREEZABLE, 0); 171 if (!gfs2_control_wq) 172 goto fail_wq2; 173 174 gfs2_freeze_wq = alloc_workqueue("freeze_workqueue", 0, 0); 175 176 if (!gfs2_freeze_wq) 177 goto fail_wq3; 178 179 gfs2_page_pool = mempool_create_page_pool(64, 0); 180 if (!gfs2_page_pool) 181 goto fail_mempool; 182 183 gfs2_register_debugfs(); 184 185 pr_info("GFS2 installed\n"); 186 187 return 0; 188 189fail_mempool: 190 destroy_workqueue(gfs2_freeze_wq); 191fail_wq3: 192 destroy_workqueue(gfs2_control_wq); 193fail_wq2: 194 destroy_workqueue(gfs_recovery_wq); 195fail_wq1: 196 unregister_filesystem(&gfs2meta_fs_type); 197fail_fs2: 198 unregister_filesystem(&gfs2_fs_type); 199fail_fs1: 200 unregister_shrinker(&gfs2_qd_shrinker); 201fail_shrinker: 202 kmem_cache_destroy(gfs2_trans_cachep); 203fail_cachep8: 204 kmem_cache_destroy(gfs2_qadata_cachep); 205fail_cachep7: 206 kmem_cache_destroy(gfs2_quotad_cachep); 207fail_cachep6: 208 kmem_cache_destroy(gfs2_rgrpd_cachep); 209fail_cachep5: 210 kmem_cache_destroy(gfs2_bufdata_cachep); 211fail_cachep4: 212 kmem_cache_destroy(gfs2_inode_cachep); 213fail_cachep3: 214 kmem_cache_destroy(gfs2_glock_aspace_cachep); 215fail_cachep2: 216 kmem_cache_destroy(gfs2_glock_cachep); 217fail_cachep1: 218 gfs2_glock_exit(); 219fail_glock: 220 list_lru_destroy(&gfs2_qd_lru); 221fail_lru: 222 gfs2_sys_uninit(); 223 return error; 224} 225 226/** 227 * exit_gfs2_fs - Unregister the file system 228 * 229 */ 230 231static void __exit exit_gfs2_fs(void) 232{ 233 unregister_shrinker(&gfs2_qd_shrinker); 234 gfs2_glock_exit(); 235 gfs2_unregister_debugfs(); 236 unregister_filesystem(&gfs2_fs_type); 237 unregister_filesystem(&gfs2meta_fs_type); 238 destroy_workqueue(gfs_recovery_wq); 239 destroy_workqueue(gfs2_control_wq); 240 destroy_workqueue(gfs2_freeze_wq); 241 list_lru_destroy(&gfs2_qd_lru); 242 243 rcu_barrier(); 244 245 mempool_destroy(gfs2_page_pool); 246 kmem_cache_destroy(gfs2_trans_cachep); 247 kmem_cache_destroy(gfs2_qadata_cachep); 248 kmem_cache_destroy(gfs2_quotad_cachep); 249 kmem_cache_destroy(gfs2_rgrpd_cachep); 250 kmem_cache_destroy(gfs2_bufdata_cachep); 251 kmem_cache_destroy(gfs2_inode_cachep); 252 kmem_cache_destroy(gfs2_glock_aspace_cachep); 253 kmem_cache_destroy(gfs2_glock_cachep); 254 255 gfs2_sys_uninit(); 256} 257 258MODULE_DESCRIPTION("Global File System"); 259MODULE_AUTHOR("Red Hat, Inc."); 260MODULE_LICENSE("GPL"); 261 262module_init(init_gfs2_fs); 263module_exit(exit_gfs2_fs); 264