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 <asm/atomic.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 31 static struct shrinker qd_shrinker = { 32 .shrink = gfs2_shrink_qd_memory, 33 .seeks = DEFAULT_SEEKS, 34 }; 35 36 static void gfs2_init_inode_once(void *foo) 37 { 38 struct gfs2_inode *ip = foo; 39 40 inode_init_once(&ip->i_inode); 41 init_rwsem(&ip->i_rw_mutex); 42 INIT_LIST_HEAD(&ip->i_trunc_list); 43 ip->i_alloc = NULL; 44 } 45 46 static void gfs2_init_glock_once(void *foo) 47 { 48 struct gfs2_glock *gl = foo; 49 50 INIT_HLIST_BL_NODE(&gl->gl_list); 51 spin_lock_init(&gl->gl_spin); 52 INIT_LIST_HEAD(&gl->gl_holders); 53 INIT_LIST_HEAD(&gl->gl_lru); 54 INIT_LIST_HEAD(&gl->gl_ail_list); 55 atomic_set(&gl->gl_ail_count, 0); 56 atomic_set(&gl->gl_revokes, 0); 57 } 58 59 static void gfs2_init_gl_aspace_once(void *foo) 60 { 61 struct gfs2_glock *gl = foo; 62 struct address_space *mapping = (struct address_space *)(gl + 1); 63 64 gfs2_init_glock_once(gl); 65 address_space_init_once(mapping); 66 } 67 68 /** 69 * init_gfs2_fs - Register GFS2 as a filesystem 70 * 71 * Returns: 0 on success, error code on failure 72 */ 73 74 static int __init init_gfs2_fs(void) 75 { 76 int error; 77 78 gfs2_str2qstr(&gfs2_qdot, "."); 79 gfs2_str2qstr(&gfs2_qdotdot, ".."); 80 81 error = gfs2_sys_init(); 82 if (error) 83 return error; 84 85 error = gfs2_glock_init(); 86 if (error) 87 goto fail; 88 89 error = -ENOMEM; 90 gfs2_glock_cachep = kmem_cache_create("gfs2_glock", 91 sizeof(struct gfs2_glock), 92 0, 0, 93 gfs2_init_glock_once); 94 if (!gfs2_glock_cachep) 95 goto fail; 96 97 gfs2_glock_aspace_cachep = kmem_cache_create("gfs2_glock(aspace)", 98 sizeof(struct gfs2_glock) + 99 sizeof(struct address_space), 100 0, 0, gfs2_init_gl_aspace_once); 101 102 if (!gfs2_glock_aspace_cachep) 103 goto fail; 104 105 gfs2_inode_cachep = kmem_cache_create("gfs2_inode", 106 sizeof(struct gfs2_inode), 107 0, SLAB_RECLAIM_ACCOUNT| 108 SLAB_MEM_SPREAD, 109 gfs2_init_inode_once); 110 if (!gfs2_inode_cachep) 111 goto fail; 112 113 gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata", 114 sizeof(struct gfs2_bufdata), 115 0, 0, NULL); 116 if (!gfs2_bufdata_cachep) 117 goto fail; 118 119 gfs2_rgrpd_cachep = kmem_cache_create("gfs2_rgrpd", 120 sizeof(struct gfs2_rgrpd), 121 0, 0, NULL); 122 if (!gfs2_rgrpd_cachep) 123 goto fail; 124 125 gfs2_quotad_cachep = kmem_cache_create("gfs2_quotad", 126 sizeof(struct gfs2_quota_data), 127 0, 0, NULL); 128 if (!gfs2_quotad_cachep) 129 goto fail; 130 131 register_shrinker(&qd_shrinker); 132 133 error = register_filesystem(&gfs2_fs_type); 134 if (error) 135 goto fail; 136 137 error = register_filesystem(&gfs2meta_fs_type); 138 if (error) 139 goto fail_unregister; 140 141 error = -ENOMEM; 142 gfs_recovery_wq = alloc_workqueue("gfs_recovery", 143 WQ_MEM_RECLAIM | WQ_FREEZABLE, 0); 144 if (!gfs_recovery_wq) 145 goto fail_wq; 146 147 gfs2_register_debugfs(); 148 149 printk("GFS2 (built %s %s) installed\n", __DATE__, __TIME__); 150 151 return 0; 152 153 fail_wq: 154 unregister_filesystem(&gfs2meta_fs_type); 155 fail_unregister: 156 unregister_filesystem(&gfs2_fs_type); 157 fail: 158 unregister_shrinker(&qd_shrinker); 159 gfs2_glock_exit(); 160 161 if (gfs2_quotad_cachep) 162 kmem_cache_destroy(gfs2_quotad_cachep); 163 164 if (gfs2_rgrpd_cachep) 165 kmem_cache_destroy(gfs2_rgrpd_cachep); 166 167 if (gfs2_bufdata_cachep) 168 kmem_cache_destroy(gfs2_bufdata_cachep); 169 170 if (gfs2_inode_cachep) 171 kmem_cache_destroy(gfs2_inode_cachep); 172 173 if (gfs2_glock_aspace_cachep) 174 kmem_cache_destroy(gfs2_glock_aspace_cachep); 175 176 if (gfs2_glock_cachep) 177 kmem_cache_destroy(gfs2_glock_cachep); 178 179 gfs2_sys_uninit(); 180 return error; 181 } 182 183 /** 184 * exit_gfs2_fs - Unregister the file system 185 * 186 */ 187 188 static void __exit exit_gfs2_fs(void) 189 { 190 unregister_shrinker(&qd_shrinker); 191 gfs2_glock_exit(); 192 gfs2_unregister_debugfs(); 193 unregister_filesystem(&gfs2_fs_type); 194 unregister_filesystem(&gfs2meta_fs_type); 195 destroy_workqueue(gfs_recovery_wq); 196 197 rcu_barrier(); 198 199 kmem_cache_destroy(gfs2_quotad_cachep); 200 kmem_cache_destroy(gfs2_rgrpd_cachep); 201 kmem_cache_destroy(gfs2_bufdata_cachep); 202 kmem_cache_destroy(gfs2_inode_cachep); 203 kmem_cache_destroy(gfs2_glock_aspace_cachep); 204 kmem_cache_destroy(gfs2_glock_cachep); 205 206 gfs2_sys_uninit(); 207 } 208 209 MODULE_DESCRIPTION("Global File System"); 210 MODULE_AUTHOR("Red Hat, Inc."); 211 MODULE_LICENSE("GPL"); 212 213 module_init(init_gfs2_fs); 214 module_exit(exit_gfs2_fs); 215 216