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