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 atomic_set(&gl->gl_revokes, 0); 60 } 61 62 static void gfs2_init_gl_aspace_once(void *foo) 63 { 64 struct gfs2_glock *gl = foo; 65 struct address_space *mapping = (struct address_space *)(gl + 1); 66 67 gfs2_init_glock_once(gl); 68 address_space_init_once(mapping); 69 } 70 71 /** 72 * init_gfs2_fs - Register GFS2 as a filesystem 73 * 74 * Returns: 0 on success, error code on failure 75 */ 76 77 static int __init init_gfs2_fs(void) 78 { 79 int error; 80 81 gfs2_str2qstr(&gfs2_qdot, "."); 82 gfs2_str2qstr(&gfs2_qdotdot, ".."); 83 gfs2_quota_hash_init(); 84 85 error = gfs2_sys_init(); 86 if (error) 87 return error; 88 89 error = list_lru_init(&gfs2_qd_lru); 90 if (error) 91 goto fail_lru; 92 93 error = gfs2_glock_init(); 94 if (error) 95 goto fail_glock; 96 97 error = -ENOMEM; 98 gfs2_glock_cachep = kmem_cache_create("gfs2_glock", 99 sizeof(struct gfs2_glock), 100 0, 0, 101 gfs2_init_glock_once); 102 if (!gfs2_glock_cachep) 103 goto fail_cachep1; 104 105 gfs2_glock_aspace_cachep = kmem_cache_create("gfs2_glock(aspace)", 106 sizeof(struct gfs2_glock) + 107 sizeof(struct address_space), 108 0, 0, gfs2_init_gl_aspace_once); 109 110 if (!gfs2_glock_aspace_cachep) 111 goto fail_cachep2; 112 113 gfs2_inode_cachep = kmem_cache_create("gfs2_inode", 114 sizeof(struct gfs2_inode), 115 0, SLAB_RECLAIM_ACCOUNT| 116 SLAB_MEM_SPREAD| 117 SLAB_ACCOUNT, 118 gfs2_init_inode_once); 119 if (!gfs2_inode_cachep) 120 goto fail_cachep3; 121 122 gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata", 123 sizeof(struct gfs2_bufdata), 124 0, 0, NULL); 125 if (!gfs2_bufdata_cachep) 126 goto fail_cachep4; 127 128 gfs2_rgrpd_cachep = kmem_cache_create("gfs2_rgrpd", 129 sizeof(struct gfs2_rgrpd), 130 0, 0, NULL); 131 if (!gfs2_rgrpd_cachep) 132 goto fail_cachep5; 133 134 gfs2_quotad_cachep = kmem_cache_create("gfs2_quotad", 135 sizeof(struct gfs2_quota_data), 136 0, 0, NULL); 137 if (!gfs2_quotad_cachep) 138 goto fail_cachep6; 139 140 gfs2_qadata_cachep = kmem_cache_create("gfs2_qadata", 141 sizeof(struct gfs2_qadata), 142 0, 0, NULL); 143 if (!gfs2_qadata_cachep) 144 goto fail_cachep7; 145 146 error = register_shrinker(&gfs2_qd_shrinker); 147 if (error) 148 goto fail_shrinker; 149 150 error = register_filesystem(&gfs2_fs_type); 151 if (error) 152 goto fail_fs1; 153 154 error = register_filesystem(&gfs2meta_fs_type); 155 if (error) 156 goto fail_fs2; 157 158 error = -ENOMEM; 159 gfs_recovery_wq = alloc_workqueue("gfs_recovery", 160 WQ_MEM_RECLAIM | WQ_FREEZABLE, 0); 161 if (!gfs_recovery_wq) 162 goto fail_wq1; 163 164 gfs2_control_wq = alloc_workqueue("gfs2_control", 165 WQ_UNBOUND | WQ_FREEZABLE, 0); 166 if (!gfs2_control_wq) 167 goto fail_wq2; 168 169 gfs2_freeze_wq = alloc_workqueue("freeze_workqueue", 0, 0); 170 171 if (!gfs2_freeze_wq) 172 goto fail_wq3; 173 174 gfs2_page_pool = mempool_create_page_pool(64, 0); 175 if (!gfs2_page_pool) 176 goto fail_mempool; 177 178 gfs2_register_debugfs(); 179 180 pr_info("GFS2 installed\n"); 181 182 return 0; 183 184 fail_mempool: 185 destroy_workqueue(gfs2_freeze_wq); 186 fail_wq3: 187 destroy_workqueue(gfs2_control_wq); 188 fail_wq2: 189 destroy_workqueue(gfs_recovery_wq); 190 fail_wq1: 191 unregister_filesystem(&gfs2meta_fs_type); 192 fail_fs2: 193 unregister_filesystem(&gfs2_fs_type); 194 fail_fs1: 195 unregister_shrinker(&gfs2_qd_shrinker); 196 fail_shrinker: 197 kmem_cache_destroy(gfs2_qadata_cachep); 198 fail_cachep7: 199 kmem_cache_destroy(gfs2_quotad_cachep); 200 fail_cachep6: 201 kmem_cache_destroy(gfs2_rgrpd_cachep); 202 fail_cachep5: 203 kmem_cache_destroy(gfs2_bufdata_cachep); 204 fail_cachep4: 205 kmem_cache_destroy(gfs2_inode_cachep); 206 fail_cachep3: 207 kmem_cache_destroy(gfs2_glock_aspace_cachep); 208 fail_cachep2: 209 kmem_cache_destroy(gfs2_glock_cachep); 210 fail_cachep1: 211 gfs2_glock_exit(); 212 fail_glock: 213 list_lru_destroy(&gfs2_qd_lru); 214 fail_lru: 215 gfs2_sys_uninit(); 216 return error; 217 } 218 219 /** 220 * exit_gfs2_fs - Unregister the file system 221 * 222 */ 223 224 static void __exit exit_gfs2_fs(void) 225 { 226 unregister_shrinker(&gfs2_qd_shrinker); 227 gfs2_glock_exit(); 228 gfs2_unregister_debugfs(); 229 unregister_filesystem(&gfs2_fs_type); 230 unregister_filesystem(&gfs2meta_fs_type); 231 destroy_workqueue(gfs_recovery_wq); 232 destroy_workqueue(gfs2_control_wq); 233 destroy_workqueue(gfs2_freeze_wq); 234 list_lru_destroy(&gfs2_qd_lru); 235 236 rcu_barrier(); 237 238 mempool_destroy(gfs2_page_pool); 239 kmem_cache_destroy(gfs2_qadata_cachep); 240 kmem_cache_destroy(gfs2_quotad_cachep); 241 kmem_cache_destroy(gfs2_rgrpd_cachep); 242 kmem_cache_destroy(gfs2_bufdata_cachep); 243 kmem_cache_destroy(gfs2_inode_cachep); 244 kmem_cache_destroy(gfs2_glock_aspace_cachep); 245 kmem_cache_destroy(gfs2_glock_cachep); 246 247 gfs2_sys_uninit(); 248 } 249 250 MODULE_DESCRIPTION("Global File System"); 251 MODULE_AUTHOR("Red Hat, Inc."); 252 MODULE_LICENSE("GPL"); 253 254 module_init(init_gfs2_fs); 255 module_exit(exit_gfs2_fs); 256 257