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 INIT_LIST_HEAD(&gl->gl_holders); 55 INIT_LIST_HEAD(&gl->gl_lru); 56 INIT_LIST_HEAD(&gl->gl_ail_list); 57 atomic_set(&gl->gl_ail_count, 0); 58 atomic_set(&gl->gl_revokes, 0); 59 } 60 61 static void gfs2_init_gl_aspace_once(void *foo) 62 { 63 struct gfs2_glock_aspace *gla = foo; 64 65 gfs2_init_glock_once(&gla->glock); 66 address_space_init_once(&gla->mapping); 67 } 68 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 79 gfs2_str2qstr(&gfs2_qdot, "."); 80 gfs2_str2qstr(&gfs2_qdotdot, ".."); 81 gfs2_quota_hash_init(); 82 83 error = gfs2_sys_init(); 84 if (error) 85 return error; 86 87 error = list_lru_init(&gfs2_qd_lru); 88 if (error) 89 goto fail_lru; 90 91 error = gfs2_glock_init(); 92 if (error) 93 goto fail_glock; 94 95 error = -ENOMEM; 96 gfs2_glock_cachep = kmem_cache_create("gfs2_glock", 97 sizeof(struct gfs2_glock), 98 0, SLAB_RECLAIM_ACCOUNT, 99 gfs2_init_glock_once); 100 if (!gfs2_glock_cachep) 101 goto fail_cachep1; 102 103 gfs2_glock_aspace_cachep = kmem_cache_create("gfs2_glock(aspace)", 104 sizeof(struct gfs2_glock_aspace), 105 0, 0, gfs2_init_gl_aspace_once); 106 107 if (!gfs2_glock_aspace_cachep) 108 goto fail_cachep2; 109 110 gfs2_inode_cachep = kmem_cache_create("gfs2_inode", 111 sizeof(struct gfs2_inode), 112 0, SLAB_RECLAIM_ACCOUNT| 113 SLAB_ACCOUNT, 114 gfs2_init_inode_once); 115 if (!gfs2_inode_cachep) 116 goto fail_cachep3; 117 118 gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata", 119 sizeof(struct gfs2_bufdata), 120 0, 0, NULL); 121 if (!gfs2_bufdata_cachep) 122 goto fail_cachep4; 123 124 gfs2_rgrpd_cachep = kmem_cache_create("gfs2_rgrpd", 125 sizeof(struct gfs2_rgrpd), 126 0, 0, NULL); 127 if (!gfs2_rgrpd_cachep) 128 goto fail_cachep5; 129 130 gfs2_quotad_cachep = kmem_cache_create("gfs2_quotad", 131 sizeof(struct gfs2_quota_data), 132 0, SLAB_RECLAIM_ACCOUNT, NULL); 133 if (!gfs2_quotad_cachep) 134 goto fail_cachep6; 135 136 gfs2_qadata_cachep = kmem_cache_create("gfs2_qadata", 137 sizeof(struct gfs2_qadata), 138 0, 0, NULL); 139 if (!gfs2_qadata_cachep) 140 goto fail_cachep7; 141 142 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; 147 148 error = gfs2_qd_shrinker_init(); 149 if (error) 150 goto fail_shrinker; 151 152 error = -ENOMEM; 153 gfs2_recovery_wq = alloc_workqueue("gfs2_recovery", 154 WQ_MEM_RECLAIM | WQ_FREEZABLE, 0); 155 if (!gfs2_recovery_wq) 156 goto fail_wq1; 157 158 gfs2_control_wq = alloc_workqueue("gfs2_control", 159 WQ_UNBOUND | WQ_FREEZABLE, 0); 160 if (!gfs2_control_wq) 161 goto fail_wq2; 162 163 gfs2_freeze_wq = alloc_workqueue("gfs2_freeze", 0, 0); 164 165 if (!gfs2_freeze_wq) 166 goto fail_wq3; 167 168 gfs2_page_pool = mempool_create_page_pool(64, 0); 169 if (!gfs2_page_pool) 170 goto fail_mempool; 171 172 gfs2_register_debugfs(); 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; 180 181 182 pr_info("GFS2 installed\n"); 183 184 return 0; 185 186 fail_fs2: 187 unregister_filesystem(&gfs2_fs_type); 188 fail_fs1: 189 mempool_destroy(gfs2_page_pool); 190 fail_mempool: 191 destroy_workqueue(gfs2_freeze_wq); 192 fail_wq3: 193 destroy_workqueue(gfs2_control_wq); 194 fail_wq2: 195 destroy_workqueue(gfs2_recovery_wq); 196 fail_wq1: 197 gfs2_qd_shrinker_exit(); 198 fail_shrinker: 199 kmem_cache_destroy(gfs2_trans_cachep); 200 fail_cachep8: 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: 215 gfs2_glock_exit(); 216 fail_glock: 217 list_lru_destroy(&gfs2_qd_lru); 218 fail_lru: 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 { 230 gfs2_qd_shrinker_exit(); 231 gfs2_glock_exit(); 232 gfs2_unregister_debugfs(); 233 unregister_filesystem(&gfs2_fs_type); 234 unregister_filesystem(&gfs2meta_fs_type); 235 destroy_workqueue(gfs2_recovery_wq); 236 destroy_workqueue(gfs2_control_wq); 237 destroy_workqueue(gfs2_freeze_wq); 238 list_lru_destroy(&gfs2_qd_lru); 239 240 rcu_barrier(); 241 242 mempool_destroy(gfs2_page_pool); 243 kmem_cache_destroy(gfs2_trans_cachep); 244 kmem_cache_destroy(gfs2_qadata_cachep); 245 kmem_cache_destroy(gfs2_quotad_cachep); 246 kmem_cache_destroy(gfs2_rgrpd_cachep); 247 kmem_cache_destroy(gfs2_bufdata_cachep); 248 kmem_cache_destroy(gfs2_inode_cachep); 249 kmem_cache_destroy(gfs2_glock_aspace_cachep); 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); 261 262