1 /* 2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. 3 * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. 4 * 5 * This copyrighted material is made available to anyone wishing to use, 6 * modify, copy, or redistribute it subject to the terms and conditions 7 * of the GNU General Public License version 2. 8 */ 9 10 #include <linux/slab.h> 11 #include <linux/spinlock.h> 12 #include <linux/completion.h> 13 #include <linux/buffer_head.h> 14 #include <linux/module.h> 15 #include <linux/init.h> 16 #include <linux/gfs2_ondisk.h> 17 #include <linux/rcupdate.h> 18 #include <linux/rculist_bl.h> 19 #include <linux/atomic.h> 20 #include <linux/mempool.h> 21 22 #include "gfs2.h" 23 #include "incore.h" 24 #include "super.h" 25 #include "sys.h" 26 #include "util.h" 27 #include "glock.h" 28 #include "quota.h" 29 #include "recovery.h" 30 #include "dir.h" 31 32 struct workqueue_struct *gfs2_control_wq; 33 34 static struct shrinker qd_shrinker = { 35 .shrink = gfs2_shrink_qd_memory, 36 .seeks = DEFAULT_SEEKS, 37 }; 38 39 static void gfs2_init_inode_once(void *foo) 40 { 41 struct gfs2_inode *ip = foo; 42 43 inode_init_once(&ip->i_inode); 44 init_rwsem(&ip->i_rw_mutex); 45 INIT_LIST_HEAD(&ip->i_trunc_list); 46 ip->i_qadata = NULL; 47 ip->i_res = NULL; 48 ip->i_hash_cache = NULL; 49 } 50 51 static void gfs2_init_glock_once(void *foo) 52 { 53 struct gfs2_glock *gl = foo; 54 55 INIT_HLIST_BL_NODE(&gl->gl_list); 56 spin_lock_init(&gl->gl_spin); 57 INIT_LIST_HEAD(&gl->gl_holders); 58 INIT_LIST_HEAD(&gl->gl_lru); 59 INIT_LIST_HEAD(&gl->gl_ail_list); 60 atomic_set(&gl->gl_ail_count, 0); 61 atomic_set(&gl->gl_revokes, 0); 62 } 63 64 static void gfs2_init_gl_aspace_once(void *foo) 65 { 66 struct gfs2_glock *gl = foo; 67 struct address_space *mapping = (struct address_space *)(gl + 1); 68 69 gfs2_init_glock_once(gl); 70 address_space_init_once(mapping); 71 } 72 73 /** 74 * init_gfs2_fs - Register GFS2 as a filesystem 75 * 76 * Returns: 0 on success, error code on failure 77 */ 78 79 static int __init init_gfs2_fs(void) 80 { 81 int error; 82 83 gfs2_str2qstr(&gfs2_qdot, "."); 84 gfs2_str2qstr(&gfs2_qdotdot, ".."); 85 86 error = gfs2_sys_init(); 87 if (error) 88 return error; 89 90 error = gfs2_glock_init(); 91 if (error) 92 goto fail; 93 94 error = -ENOMEM; 95 gfs2_glock_cachep = kmem_cache_create("gfs2_glock", 96 sizeof(struct gfs2_glock), 97 0, 0, 98 gfs2_init_glock_once); 99 if (!gfs2_glock_cachep) 100 goto fail; 101 102 gfs2_glock_aspace_cachep = kmem_cache_create("gfs2_glock(aspace)", 103 sizeof(struct gfs2_glock) + 104 sizeof(struct address_space), 105 0, 0, gfs2_init_gl_aspace_once); 106 107 if (!gfs2_glock_aspace_cachep) 108 goto fail; 109 110 gfs2_inode_cachep = kmem_cache_create("gfs2_inode", 111 sizeof(struct gfs2_inode), 112 0, SLAB_RECLAIM_ACCOUNT| 113 SLAB_MEM_SPREAD, 114 gfs2_init_inode_once); 115 if (!gfs2_inode_cachep) 116 goto fail; 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; 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; 129 130 gfs2_quotad_cachep = kmem_cache_create("gfs2_quotad", 131 sizeof(struct gfs2_quota_data), 132 0, 0, NULL); 133 if (!gfs2_quotad_cachep) 134 goto fail; 135 136 gfs2_rsrv_cachep = kmem_cache_create("gfs2_mblk", 137 sizeof(struct gfs2_blkreserv), 138 0, 0, NULL); 139 if (!gfs2_rsrv_cachep) 140 goto fail; 141 142 register_shrinker(&qd_shrinker); 143 144 error = register_filesystem(&gfs2_fs_type); 145 if (error) 146 goto fail; 147 148 error = register_filesystem(&gfs2meta_fs_type); 149 if (error) 150 goto fail_unregister; 151 152 error = -ENOMEM; 153 gfs_recovery_wq = alloc_workqueue("gfs_recovery", 154 WQ_MEM_RECLAIM | WQ_FREEZABLE, 0); 155 if (!gfs_recovery_wq) 156 goto fail_wq; 157 158 gfs2_control_wq = alloc_workqueue("gfs2_control", 159 WQ_NON_REENTRANT | WQ_UNBOUND | WQ_FREEZABLE, 0); 160 if (!gfs2_control_wq) 161 goto fail_recovery; 162 163 gfs2_page_pool = mempool_create_page_pool(64, 0); 164 if (!gfs2_page_pool) 165 goto fail_control; 166 167 gfs2_register_debugfs(); 168 169 printk("GFS2 installed\n"); 170 171 return 0; 172 173 fail_control: 174 destroy_workqueue(gfs2_control_wq); 175 fail_recovery: 176 destroy_workqueue(gfs_recovery_wq); 177 fail_wq: 178 unregister_filesystem(&gfs2meta_fs_type); 179 fail_unregister: 180 unregister_filesystem(&gfs2_fs_type); 181 fail: 182 unregister_shrinker(&qd_shrinker); 183 gfs2_glock_exit(); 184 185 if (gfs2_rsrv_cachep) 186 kmem_cache_destroy(gfs2_rsrv_cachep); 187 188 if (gfs2_quotad_cachep) 189 kmem_cache_destroy(gfs2_quotad_cachep); 190 191 if (gfs2_rgrpd_cachep) 192 kmem_cache_destroy(gfs2_rgrpd_cachep); 193 194 if (gfs2_bufdata_cachep) 195 kmem_cache_destroy(gfs2_bufdata_cachep); 196 197 if (gfs2_inode_cachep) 198 kmem_cache_destroy(gfs2_inode_cachep); 199 200 if (gfs2_glock_aspace_cachep) 201 kmem_cache_destroy(gfs2_glock_aspace_cachep); 202 203 if (gfs2_glock_cachep) 204 kmem_cache_destroy(gfs2_glock_cachep); 205 206 gfs2_sys_uninit(); 207 return error; 208 } 209 210 /** 211 * exit_gfs2_fs - Unregister the file system 212 * 213 */ 214 215 static void __exit exit_gfs2_fs(void) 216 { 217 unregister_shrinker(&qd_shrinker); 218 gfs2_glock_exit(); 219 gfs2_unregister_debugfs(); 220 unregister_filesystem(&gfs2_fs_type); 221 unregister_filesystem(&gfs2meta_fs_type); 222 destroy_workqueue(gfs_recovery_wq); 223 destroy_workqueue(gfs2_control_wq); 224 225 rcu_barrier(); 226 227 mempool_destroy(gfs2_page_pool); 228 kmem_cache_destroy(gfs2_rsrv_cachep); 229 kmem_cache_destroy(gfs2_quotad_cachep); 230 kmem_cache_destroy(gfs2_rgrpd_cachep); 231 kmem_cache_destroy(gfs2_bufdata_cachep); 232 kmem_cache_destroy(gfs2_inode_cachep); 233 kmem_cache_destroy(gfs2_glock_aspace_cachep); 234 kmem_cache_destroy(gfs2_glock_cachep); 235 236 gfs2_sys_uninit(); 237 } 238 239 MODULE_DESCRIPTION("Global File System"); 240 MODULE_AUTHOR("Red Hat, Inc."); 241 MODULE_LICENSE("GPL"); 242 243 module_init(init_gfs2_fs); 244 module_exit(exit_gfs2_fs); 245 246