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 32 struct workqueue_struct *gfs2_control_wq; 33 34 static 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_ordered); 42 ip->i_qadata = NULL; 43 gfs2_holder_mark_uninitialized(&ip->i_rgd_gh); 44 memset(&ip->i_res, 0, sizeof(ip->i_res)); 45 RB_CLEAR_NODE(&ip->i_res.rs_node); 46 ip->i_hash_cache = NULL; 47 gfs2_holder_mark_uninitialized(&ip->i_iopen_gh); 48 } 49 50 static void gfs2_init_glock_once(void *foo) 51 { 52 struct gfs2_glock *gl = foo; 53 54 spin_lock_init(&gl->gl_lockref.lock); 55 INIT_LIST_HEAD(&gl->gl_holders); 56 INIT_LIST_HEAD(&gl->gl_lru); 57 INIT_LIST_HEAD(&gl->gl_ail_list); 58 atomic_set(&gl->gl_ail_count, 0); 59 atomic_set(&gl->gl_revokes, 0); 60 } 61 62 static void gfs2_init_gl_aspace_once(void *foo) 63 { 64 struct gfs2_glock_aspace *gla = foo; 65 66 gfs2_init_glock_once(&gla->glock); 67 address_space_init_once(&gla->mapping); 68 } 69 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 80 gfs2_str2qstr(&gfs2_qdot, "."); 81 gfs2_str2qstr(&gfs2_qdotdot, ".."); 82 gfs2_quota_hash_init(); 83 84 error = gfs2_sys_init(); 85 if (error) 86 return error; 87 88 error = list_lru_init(&gfs2_qd_lru); 89 if (error) 90 goto fail_lru; 91 92 error = gfs2_glock_init(); 93 if (error) 94 goto fail_glock; 95 96 error = -ENOMEM; 97 gfs2_glock_cachep = kmem_cache_create("gfs2_glock", 98 sizeof(struct gfs2_glock), 99 0, SLAB_RECLAIM_ACCOUNT, 100 gfs2_init_glock_once); 101 if (!gfs2_glock_cachep) 102 goto fail_cachep1; 103 104 gfs2_glock_aspace_cachep = kmem_cache_create("gfs2_glock(aspace)", 105 sizeof(struct gfs2_glock_aspace), 106 0, 0, gfs2_init_gl_aspace_once); 107 108 if (!gfs2_glock_aspace_cachep) 109 goto fail_cachep2; 110 111 gfs2_inode_cachep = kmem_cache_create("gfs2_inode", 112 sizeof(struct gfs2_inode), 113 0, SLAB_RECLAIM_ACCOUNT| 114 SLAB_MEM_SPREAD| 115 SLAB_ACCOUNT, 116 gfs2_init_inode_once); 117 if (!gfs2_inode_cachep) 118 goto fail_cachep3; 119 120 gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata", 121 sizeof(struct gfs2_bufdata), 122 0, 0, NULL); 123 if (!gfs2_bufdata_cachep) 124 goto fail_cachep4; 125 126 gfs2_rgrpd_cachep = kmem_cache_create("gfs2_rgrpd", 127 sizeof(struct gfs2_rgrpd), 128 0, 0, NULL); 129 if (!gfs2_rgrpd_cachep) 130 goto fail_cachep5; 131 132 gfs2_quotad_cachep = kmem_cache_create("gfs2_quotad", 133 sizeof(struct gfs2_quota_data), 134 0, SLAB_RECLAIM_ACCOUNT, NULL); 135 if (!gfs2_quotad_cachep) 136 goto fail_cachep6; 137 138 gfs2_qadata_cachep = kmem_cache_create("gfs2_qadata", 139 sizeof(struct gfs2_qadata), 140 0, 0, NULL); 141 if (!gfs2_qadata_cachep) 142 goto fail_cachep7; 143 144 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; 149 150 error = register_shrinker(&gfs2_qd_shrinker, "gfs2-qd"); 151 if (error) 152 goto fail_shrinker; 153 154 error = register_filesystem(&gfs2_fs_type); 155 if (error) 156 goto fail_fs1; 157 158 error = register_filesystem(&gfs2meta_fs_type); 159 if (error) 160 goto fail_fs2; 161 162 error = -ENOMEM; 163 gfs_recovery_wq = alloc_workqueue("gfs_recovery", 164 WQ_MEM_RECLAIM | WQ_FREEZABLE, 0); 165 if (!gfs_recovery_wq) 166 goto fail_wq1; 167 168 gfs2_control_wq = alloc_workqueue("gfs2_control", 169 WQ_UNBOUND | WQ_FREEZABLE, 0); 170 if (!gfs2_control_wq) 171 goto fail_wq2; 172 173 gfs2_freeze_wq = alloc_workqueue("freeze_workqueue", 0, 0); 174 175 if (!gfs2_freeze_wq) 176 goto fail_wq3; 177 178 gfs2_page_pool = mempool_create_page_pool(64, 0); 179 if (!gfs2_page_pool) 180 goto fail_mempool; 181 182 gfs2_register_debugfs(); 183 184 pr_info("GFS2 installed\n"); 185 186 return 0; 187 188 fail_mempool: 189 destroy_workqueue(gfs2_freeze_wq); 190 fail_wq3: 191 destroy_workqueue(gfs2_control_wq); 192 fail_wq2: 193 destroy_workqueue(gfs_recovery_wq); 194 fail_wq1: 195 unregister_filesystem(&gfs2meta_fs_type); 196 fail_fs2: 197 unregister_filesystem(&gfs2_fs_type); 198 fail_fs1: 199 unregister_shrinker(&gfs2_qd_shrinker); 200 fail_shrinker: 201 kmem_cache_destroy(gfs2_trans_cachep); 202 fail_cachep8: 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: 217 gfs2_glock_exit(); 218 fail_glock: 219 list_lru_destroy(&gfs2_qd_lru); 220 fail_lru: 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 { 232 unregister_shrinker(&gfs2_qd_shrinker); 233 gfs2_glock_exit(); 234 gfs2_unregister_debugfs(); 235 unregister_filesystem(&gfs2_fs_type); 236 unregister_filesystem(&gfs2meta_fs_type); 237 destroy_workqueue(gfs_recovery_wq); 238 destroy_workqueue(gfs2_control_wq); 239 destroy_workqueue(gfs2_freeze_wq); 240 list_lru_destroy(&gfs2_qd_lru); 241 242 rcu_barrier(); 243 244 mempool_destroy(gfs2_page_pool); 245 kmem_cache_destroy(gfs2_trans_cachep); 246 kmem_cache_destroy(gfs2_qadata_cachep); 247 kmem_cache_destroy(gfs2_quotad_cachep); 248 kmem_cache_destroy(gfs2_rgrpd_cachep); 249 kmem_cache_destroy(gfs2_bufdata_cachep); 250 kmem_cache_destroy(gfs2_inode_cachep); 251 kmem_cache_destroy(gfs2_glock_aspace_cachep); 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); 263 264