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 <asm/atomic.h> 18 19 #include "gfs2.h" 20 #include "incore.h" 21 #include "super.h" 22 #include "sys.h" 23 #include "util.h" 24 #include "glock.h" 25 #include "quota.h" 26 #include "recovery.h" 27 #include "dir.h" 28 29 static struct shrinker qd_shrinker = { 30 .shrink = gfs2_shrink_qd_memory, 31 .seeks = DEFAULT_SEEKS, 32 }; 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 init_rwsem(&ip->i_rw_mutex); 40 INIT_LIST_HEAD(&ip->i_trunc_list); 41 ip->i_alloc = NULL; 42 } 43 44 static void gfs2_init_glock_once(void *foo) 45 { 46 struct gfs2_glock *gl = foo; 47 48 INIT_HLIST_NODE(&gl->gl_list); 49 spin_lock_init(&gl->gl_spin); 50 INIT_LIST_HEAD(&gl->gl_holders); 51 INIT_LIST_HEAD(&gl->gl_lru); 52 INIT_LIST_HEAD(&gl->gl_ail_list); 53 atomic_set(&gl->gl_ail_count, 0); 54 } 55 56 static void gfs2_init_gl_aspace_once(void *foo) 57 { 58 struct gfs2_glock *gl = foo; 59 struct address_space *mapping = (struct address_space *)(gl + 1); 60 61 gfs2_init_glock_once(gl); 62 memset(mapping, 0, sizeof(*mapping)); 63 INIT_RADIX_TREE(&mapping->page_tree, GFP_ATOMIC); 64 spin_lock_init(&mapping->tree_lock); 65 spin_lock_init(&mapping->i_mmap_lock); 66 INIT_LIST_HEAD(&mapping->private_list); 67 spin_lock_init(&mapping->private_lock); 68 INIT_RAW_PRIO_TREE_ROOT(&mapping->i_mmap); 69 INIT_LIST_HEAD(&mapping->i_mmap_nonlinear); 70 } 71 72 /** 73 * init_gfs2_fs - Register GFS2 as a filesystem 74 * 75 * Returns: 0 on success, error code on failure 76 */ 77 78 static int __init init_gfs2_fs(void) 79 { 80 int error; 81 82 gfs2_str2qstr(&gfs2_qdot, "."); 83 gfs2_str2qstr(&gfs2_qdotdot, ".."); 84 85 error = gfs2_sys_init(); 86 if (error) 87 return error; 88 89 error = gfs2_glock_init(); 90 if (error) 91 goto fail; 92 93 error = -ENOMEM; 94 gfs2_glock_cachep = kmem_cache_create("gfs2_glock", 95 sizeof(struct gfs2_glock), 96 0, 0, 97 gfs2_init_glock_once); 98 if (!gfs2_glock_cachep) 99 goto fail; 100 101 gfs2_glock_aspace_cachep = kmem_cache_create("gfs2_glock(aspace)", 102 sizeof(struct gfs2_glock) + 103 sizeof(struct address_space), 104 0, 0, gfs2_init_gl_aspace_once); 105 106 if (!gfs2_glock_aspace_cachep) 107 goto fail; 108 109 gfs2_inode_cachep = kmem_cache_create("gfs2_inode", 110 sizeof(struct gfs2_inode), 111 0, SLAB_RECLAIM_ACCOUNT| 112 SLAB_MEM_SPREAD, 113 gfs2_init_inode_once); 114 if (!gfs2_inode_cachep) 115 goto fail; 116 117 gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata", 118 sizeof(struct gfs2_bufdata), 119 0, 0, NULL); 120 if (!gfs2_bufdata_cachep) 121 goto fail; 122 123 gfs2_rgrpd_cachep = kmem_cache_create("gfs2_rgrpd", 124 sizeof(struct gfs2_rgrpd), 125 0, 0, NULL); 126 if (!gfs2_rgrpd_cachep) 127 goto fail; 128 129 gfs2_quotad_cachep = kmem_cache_create("gfs2_quotad", 130 sizeof(struct gfs2_quota_data), 131 0, 0, NULL); 132 if (!gfs2_quotad_cachep) 133 goto fail; 134 135 register_shrinker(&qd_shrinker); 136 137 error = register_filesystem(&gfs2_fs_type); 138 if (error) 139 goto fail; 140 141 error = register_filesystem(&gfs2meta_fs_type); 142 if (error) 143 goto fail_unregister; 144 145 error = -ENOMEM; 146 gfs_recovery_wq = alloc_workqueue("gfs_recovery", 147 WQ_MEM_RECLAIM | WQ_FREEZEABLE, 0); 148 if (!gfs_recovery_wq) 149 goto fail_wq; 150 151 gfs2_register_debugfs(); 152 153 printk("GFS2 (built %s %s) installed\n", __DATE__, __TIME__); 154 155 return 0; 156 157 fail_wq: 158 unregister_filesystem(&gfs2meta_fs_type); 159 fail_unregister: 160 unregister_filesystem(&gfs2_fs_type); 161 fail: 162 unregister_shrinker(&qd_shrinker); 163 gfs2_glock_exit(); 164 165 if (gfs2_quotad_cachep) 166 kmem_cache_destroy(gfs2_quotad_cachep); 167 168 if (gfs2_rgrpd_cachep) 169 kmem_cache_destroy(gfs2_rgrpd_cachep); 170 171 if (gfs2_bufdata_cachep) 172 kmem_cache_destroy(gfs2_bufdata_cachep); 173 174 if (gfs2_inode_cachep) 175 kmem_cache_destroy(gfs2_inode_cachep); 176 177 if (gfs2_glock_aspace_cachep) 178 kmem_cache_destroy(gfs2_glock_aspace_cachep); 179 180 if (gfs2_glock_cachep) 181 kmem_cache_destroy(gfs2_glock_cachep); 182 183 gfs2_sys_uninit(); 184 return error; 185 } 186 187 /** 188 * exit_gfs2_fs - Unregister the file system 189 * 190 */ 191 192 static void __exit exit_gfs2_fs(void) 193 { 194 unregister_shrinker(&qd_shrinker); 195 gfs2_glock_exit(); 196 gfs2_unregister_debugfs(); 197 unregister_filesystem(&gfs2_fs_type); 198 unregister_filesystem(&gfs2meta_fs_type); 199 destroy_workqueue(gfs_recovery_wq); 200 201 kmem_cache_destroy(gfs2_quotad_cachep); 202 kmem_cache_destroy(gfs2_rgrpd_cachep); 203 kmem_cache_destroy(gfs2_bufdata_cachep); 204 kmem_cache_destroy(gfs2_inode_cachep); 205 kmem_cache_destroy(gfs2_glock_aspace_cachep); 206 kmem_cache_destroy(gfs2_glock_cachep); 207 208 gfs2_sys_uninit(); 209 } 210 211 MODULE_DESCRIPTION("Global File System"); 212 MODULE_AUTHOR("Red Hat, Inc."); 213 MODULE_LICENSE("GPL"); 214 215 module_init(init_gfs2_fs); 216 module_exit(exit_gfs2_fs); 217 218