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 *gl = foo; 66 struct address_space *mapping = (struct address_space *)(gl + 1); 67 68 gfs2_init_glock_once(gl); 69 address_space_init_once(mapping); 70} 71 72/** 73 * init_gfs2_fs - Register GFS2 as a filesystem 74 * 75 * Returns: 0 on success, error code on failure 76 */ 77 78static int __init init_gfs2_fs(void) 79{ 80 int error; 81 82 gfs2_str2qstr(&gfs2_qdot, "."); 83 gfs2_str2qstr(&gfs2_qdotdot, ".."); 84 gfs2_quota_hash_init(); 85 86 error = gfs2_sys_init(); 87 if (error) 88 return error; 89 90 error = list_lru_init(&gfs2_qd_lru); 91 if (error) 92 goto fail_lru; 93 94 error = gfs2_glock_init(); 95 if (error) 96 goto fail_glock; 97 98 error = -ENOMEM; 99 gfs2_glock_cachep = kmem_cache_create("gfs2_glock", 100 sizeof(struct gfs2_glock), 101 0, 0, 102 gfs2_init_glock_once); 103 if (!gfs2_glock_cachep) 104 goto fail_cachep1; 105 106 gfs2_glock_aspace_cachep = kmem_cache_create("gfs2_glock(aspace)", 107 sizeof(struct gfs2_glock) + 108 sizeof(struct address_space), 109 0, 0, gfs2_init_gl_aspace_once); 110 111 if (!gfs2_glock_aspace_cachep) 112 goto fail_cachep2; 113 114 gfs2_inode_cachep = kmem_cache_create("gfs2_inode", 115 sizeof(struct gfs2_inode), 116 0, SLAB_RECLAIM_ACCOUNT| 117 SLAB_MEM_SPREAD| 118 SLAB_ACCOUNT, 119 gfs2_init_inode_once); 120 if (!gfs2_inode_cachep) 121 goto fail_cachep3; 122 123 gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata", 124 sizeof(struct gfs2_bufdata), 125 0, 0, NULL); 126 if (!gfs2_bufdata_cachep) 127 goto fail_cachep4; 128 129 gfs2_rgrpd_cachep = kmem_cache_create("gfs2_rgrpd", 130 sizeof(struct gfs2_rgrpd), 131 0, 0, NULL); 132 if (!gfs2_rgrpd_cachep) 133 goto fail_cachep5; 134 135 gfs2_quotad_cachep = kmem_cache_create("gfs2_quotad", 136 sizeof(struct gfs2_quota_data), 137 0, 0, NULL); 138 if (!gfs2_quotad_cachep) 139 goto fail_cachep6; 140 141 gfs2_qadata_cachep = kmem_cache_create("gfs2_qadata", 142 sizeof(struct gfs2_qadata), 143 0, 0, NULL); 144 if (!gfs2_qadata_cachep) 145 goto fail_cachep7; 146 147 gfs2_trans_cachep = kmem_cache_create("gfs2_trans", 148 sizeof(struct gfs2_trans), 149 0, 0, NULL); 150 if (!gfs2_trans_cachep) 151 goto fail_cachep8; 152 153 error = register_shrinker(&gfs2_qd_shrinker); 154 if (error) 155 goto fail_shrinker; 156 157 error = register_filesystem(&gfs2_fs_type); 158 if (error) 159 goto fail_fs1; 160 161 error = register_filesystem(&gfs2meta_fs_type); 162 if (error) 163 goto fail_fs2; 164 165 error = -ENOMEM; 166 gfs_recovery_wq = alloc_workqueue("gfs_recovery", 167 WQ_MEM_RECLAIM | WQ_FREEZABLE, 0); 168 if (!gfs_recovery_wq) 169 goto fail_wq1; 170 171 gfs2_control_wq = alloc_workqueue("gfs2_control", 172 WQ_UNBOUND | WQ_FREEZABLE, 0); 173 if (!gfs2_control_wq) 174 goto fail_wq2; 175 176 gfs2_freeze_wq = alloc_workqueue("freeze_workqueue", 0, 0); 177 178 if (!gfs2_freeze_wq) 179 goto fail_wq3; 180 181 gfs2_page_pool = mempool_create_page_pool(64, 0); 182 if (!gfs2_page_pool) 183 goto fail_mempool; 184 185 gfs2_register_debugfs(); 186 187 pr_info("GFS2 installed\n"); 188 189 return 0; 190 191fail_mempool: 192 destroy_workqueue(gfs2_freeze_wq); 193fail_wq3: 194 destroy_workqueue(gfs2_control_wq); 195fail_wq2: 196 destroy_workqueue(gfs_recovery_wq); 197fail_wq1: 198 unregister_filesystem(&gfs2meta_fs_type); 199fail_fs2: 200 unregister_filesystem(&gfs2_fs_type); 201fail_fs1: 202 unregister_shrinker(&gfs2_qd_shrinker); 203fail_shrinker: 204 kmem_cache_destroy(gfs2_trans_cachep); 205fail_cachep8: 206 kmem_cache_destroy(gfs2_qadata_cachep); 207fail_cachep7: 208 kmem_cache_destroy(gfs2_quotad_cachep); 209fail_cachep6: 210 kmem_cache_destroy(gfs2_rgrpd_cachep); 211fail_cachep5: 212 kmem_cache_destroy(gfs2_bufdata_cachep); 213fail_cachep4: 214 kmem_cache_destroy(gfs2_inode_cachep); 215fail_cachep3: 216 kmem_cache_destroy(gfs2_glock_aspace_cachep); 217fail_cachep2: 218 kmem_cache_destroy(gfs2_glock_cachep); 219fail_cachep1: 220 gfs2_glock_exit(); 221fail_glock: 222 list_lru_destroy(&gfs2_qd_lru); 223fail_lru: 224 gfs2_sys_uninit(); 225 return error; 226} 227 228/** 229 * exit_gfs2_fs - Unregister the file system 230 * 231 */ 232 233static void __exit exit_gfs2_fs(void) 234{ 235 unregister_shrinker(&gfs2_qd_shrinker); 236 gfs2_glock_exit(); 237 gfs2_unregister_debugfs(); 238 unregister_filesystem(&gfs2_fs_type); 239 unregister_filesystem(&gfs2meta_fs_type); 240 destroy_workqueue(gfs_recovery_wq); 241 destroy_workqueue(gfs2_control_wq); 242 destroy_workqueue(gfs2_freeze_wq); 243 list_lru_destroy(&gfs2_qd_lru); 244 245 rcu_barrier(); 246 247 mempool_destroy(gfs2_page_pool); 248 kmem_cache_destroy(gfs2_trans_cachep); 249 kmem_cache_destroy(gfs2_qadata_cachep); 250 kmem_cache_destroy(gfs2_quotad_cachep); 251 kmem_cache_destroy(gfs2_rgrpd_cachep); 252 kmem_cache_destroy(gfs2_bufdata_cachep); 253 kmem_cache_destroy(gfs2_inode_cachep); 254 kmem_cache_destroy(gfs2_glock_aspace_cachep); 255 kmem_cache_destroy(gfs2_glock_cachep); 256 257 gfs2_sys_uninit(); 258} 259 260MODULE_DESCRIPTION("Global File System"); 261MODULE_AUTHOR("Red Hat, Inc."); 262MODULE_LICENSE("GPL"); 263 264module_init(init_gfs2_fs); 265module_exit(exit_gfs2_fs); 266 267