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_trunc_list); 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 } 60 61 static void gfs2_init_gl_aspace_once(void *foo) 62 { 63 struct gfs2_glock *gl = foo; 64 struct address_space *mapping = (struct address_space *)(gl + 1); 65 66 gfs2_init_glock_once(gl); 67 address_space_init_once(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, 0, 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) + 106 sizeof(struct address_space), 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, 0, 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 error = register_shrinker(&gfs2_qd_shrinker); 146 if (error) 147 goto fail_shrinker; 148 149 error = register_filesystem(&gfs2_fs_type); 150 if (error) 151 goto fail_fs1; 152 153 error = register_filesystem(&gfs2meta_fs_type); 154 if (error) 155 goto fail_fs2; 156 157 error = -ENOMEM; 158 gfs_recovery_wq = alloc_workqueue("gfs_recovery", 159 WQ_MEM_RECLAIM | WQ_FREEZABLE, 0); 160 if (!gfs_recovery_wq) 161 goto fail_wq1; 162 163 gfs2_control_wq = alloc_workqueue("gfs2_control", 164 WQ_UNBOUND | WQ_FREEZABLE, 0); 165 if (!gfs2_control_wq) 166 goto fail_wq2; 167 168 gfs2_freeze_wq = alloc_workqueue("freeze_workqueue", 0, 0); 169 170 if (!gfs2_freeze_wq) 171 goto fail_wq3; 172 173 gfs2_page_pool = mempool_create_page_pool(64, 0); 174 if (!gfs2_page_pool) 175 goto fail_mempool; 176 177 gfs2_register_debugfs(); 178 179 pr_info("GFS2 installed\n"); 180 181 return 0; 182 183 fail_mempool: 184 destroy_workqueue(gfs2_freeze_wq); 185 fail_wq3: 186 destroy_workqueue(gfs2_control_wq); 187 fail_wq2: 188 destroy_workqueue(gfs_recovery_wq); 189 fail_wq1: 190 unregister_filesystem(&gfs2meta_fs_type); 191 fail_fs2: 192 unregister_filesystem(&gfs2_fs_type); 193 fail_fs1: 194 unregister_shrinker(&gfs2_qd_shrinker); 195 fail_shrinker: 196 kmem_cache_destroy(gfs2_qadata_cachep); 197 fail_cachep7: 198 kmem_cache_destroy(gfs2_quotad_cachep); 199 fail_cachep6: 200 kmem_cache_destroy(gfs2_rgrpd_cachep); 201 fail_cachep5: 202 kmem_cache_destroy(gfs2_bufdata_cachep); 203 fail_cachep4: 204 kmem_cache_destroy(gfs2_inode_cachep); 205 fail_cachep3: 206 kmem_cache_destroy(gfs2_glock_aspace_cachep); 207 fail_cachep2: 208 kmem_cache_destroy(gfs2_glock_cachep); 209 fail_cachep1: 210 gfs2_glock_exit(); 211 fail_glock: 212 list_lru_destroy(&gfs2_qd_lru); 213 fail_lru: 214 gfs2_sys_uninit(); 215 return error; 216 } 217 218 /** 219 * exit_gfs2_fs - Unregister the file system 220 * 221 */ 222 223 static void __exit exit_gfs2_fs(void) 224 { 225 unregister_shrinker(&gfs2_qd_shrinker); 226 gfs2_glock_exit(); 227 gfs2_unregister_debugfs(); 228 unregister_filesystem(&gfs2_fs_type); 229 unregister_filesystem(&gfs2meta_fs_type); 230 destroy_workqueue(gfs_recovery_wq); 231 destroy_workqueue(gfs2_control_wq); 232 destroy_workqueue(gfs2_freeze_wq); 233 list_lru_destroy(&gfs2_qd_lru); 234 235 rcu_barrier(); 236 237 mempool_destroy(gfs2_page_pool); 238 kmem_cache_destroy(gfs2_qadata_cachep); 239 kmem_cache_destroy(gfs2_quotad_cachep); 240 kmem_cache_destroy(gfs2_rgrpd_cachep); 241 kmem_cache_destroy(gfs2_bufdata_cachep); 242 kmem_cache_destroy(gfs2_inode_cachep); 243 kmem_cache_destroy(gfs2_glock_aspace_cachep); 244 kmem_cache_destroy(gfs2_glock_cachep); 245 246 gfs2_sys_uninit(); 247 } 248 249 MODULE_DESCRIPTION("Global File System"); 250 MODULE_AUTHOR("Red Hat, Inc."); 251 MODULE_LICENSE("GPL"); 252 253 module_init(init_gfs2_fs); 254 module_exit(exit_gfs2_fs); 255 256