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 | WQ_PERCPU, 155 0); 156 if (!gfs2_recovery_wq) 157 goto fail_wq1; 158 159 gfs2_control_wq = alloc_workqueue("gfs2_control", 160 WQ_UNBOUND | WQ_FREEZABLE, 0); 161 if (!gfs2_control_wq) 162 goto fail_wq2; 163 164 gfs2_freeze_wq = alloc_workqueue("gfs2_freeze", WQ_PERCPU, 0); 165 166 if (!gfs2_freeze_wq) 167 goto fail_wq3; 168 169 gfs2_page_pool = mempool_create_page_pool(64, 0); 170 if (!gfs2_page_pool) 171 goto fail_mempool; 172 173 gfs2_register_debugfs(); 174 error = register_filesystem(&gfs2_fs_type); 175 if (error) 176 goto fail_fs1; 177 178 error = register_filesystem(&gfs2meta_fs_type); 179 if (error) 180 goto fail_fs2; 181 182 183 pr_info("GFS2 installed\n"); 184 185 return 0; 186 187 fail_fs2: 188 unregister_filesystem(&gfs2_fs_type); 189 fail_fs1: 190 mempool_destroy(gfs2_page_pool); 191 fail_mempool: 192 destroy_workqueue(gfs2_freeze_wq); 193 fail_wq3: 194 destroy_workqueue(gfs2_control_wq); 195 fail_wq2: 196 destroy_workqueue(gfs2_recovery_wq); 197 fail_wq1: 198 gfs2_qd_shrinker_exit(); 199 fail_shrinker: 200 kmem_cache_destroy(gfs2_trans_cachep); 201 fail_cachep8: 202 kmem_cache_destroy(gfs2_qadata_cachep); 203 fail_cachep7: 204 kmem_cache_destroy(gfs2_quotad_cachep); 205 fail_cachep6: 206 kmem_cache_destroy(gfs2_rgrpd_cachep); 207 fail_cachep5: 208 kmem_cache_destroy(gfs2_bufdata_cachep); 209 fail_cachep4: 210 kmem_cache_destroy(gfs2_inode_cachep); 211 fail_cachep3: 212 kmem_cache_destroy(gfs2_glock_aspace_cachep); 213 fail_cachep2: 214 kmem_cache_destroy(gfs2_glock_cachep); 215 fail_cachep1: 216 gfs2_glock_exit(); 217 fail_glock: 218 list_lru_destroy(&gfs2_qd_lru); 219 fail_lru: 220 gfs2_sys_uninit(); 221 return error; 222 } 223 224 /** 225 * exit_gfs2_fs - Unregister the file system 226 * 227 */ 228 229 static void __exit exit_gfs2_fs(void) 230 { 231 gfs2_qd_shrinker_exit(); 232 gfs2_glock_exit(); 233 gfs2_unregister_debugfs(); 234 unregister_filesystem(&gfs2_fs_type); 235 unregister_filesystem(&gfs2meta_fs_type); 236 destroy_workqueue(gfs2_recovery_wq); 237 destroy_workqueue(gfs2_control_wq); 238 destroy_workqueue(gfs2_freeze_wq); 239 list_lru_destroy(&gfs2_qd_lru); 240 241 rcu_barrier(); 242 243 mempool_destroy(gfs2_page_pool); 244 kmem_cache_destroy(gfs2_trans_cachep); 245 kmem_cache_destroy(gfs2_qadata_cachep); 246 kmem_cache_destroy(gfs2_quotad_cachep); 247 kmem_cache_destroy(gfs2_rgrpd_cachep); 248 kmem_cache_destroy(gfs2_bufdata_cachep); 249 kmem_cache_destroy(gfs2_inode_cachep); 250 kmem_cache_destroy(gfs2_glock_aspace_cachep); 251 kmem_cache_destroy(gfs2_glock_cachep); 252 253 gfs2_sys_uninit(); 254 } 255 256 MODULE_DESCRIPTION("Global File System"); 257 MODULE_AUTHOR("Red Hat, Inc."); 258 MODULE_LICENSE("GPL"); 259 260 module_init(init_gfs2_fs); 261 module_exit(exit_gfs2_fs); 262 263