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 #include <linux/slow-work.h> 19 20 #include "gfs2.h" 21 #include "incore.h" 22 #include "super.h" 23 #include "sys.h" 24 #include "util.h" 25 #include "glock.h" 26 #include "quota.h" 27 28 static struct shrinker qd_shrinker = { 29 .shrink = gfs2_shrink_qd_memory, 30 .seeks = DEFAULT_SEEKS, 31 }; 32 33 static void gfs2_init_inode_once(void *foo) 34 { 35 struct gfs2_inode *ip = foo; 36 37 inode_init_once(&ip->i_inode); 38 init_rwsem(&ip->i_rw_mutex); 39 INIT_LIST_HEAD(&ip->i_trunc_list); 40 ip->i_alloc = NULL; 41 } 42 43 static void gfs2_init_glock_once(void *foo) 44 { 45 struct gfs2_glock *gl = foo; 46 47 INIT_HLIST_NODE(&gl->gl_list); 48 spin_lock_init(&gl->gl_spin); 49 INIT_LIST_HEAD(&gl->gl_holders); 50 INIT_LIST_HEAD(&gl->gl_lru); 51 INIT_LIST_HEAD(&gl->gl_ail_list); 52 atomic_set(&gl->gl_ail_count, 0); 53 } 54 55 /** 56 * init_gfs2_fs - Register GFS2 as a filesystem 57 * 58 * Returns: 0 on success, error code on failure 59 */ 60 61 static int __init init_gfs2_fs(void) 62 { 63 int error; 64 65 error = gfs2_sys_init(); 66 if (error) 67 return error; 68 69 error = gfs2_glock_init(); 70 if (error) 71 goto fail; 72 73 error = -ENOMEM; 74 gfs2_glock_cachep = kmem_cache_create("gfs2_glock", 75 sizeof(struct gfs2_glock), 76 0, 0, 77 gfs2_init_glock_once); 78 if (!gfs2_glock_cachep) 79 goto fail; 80 81 gfs2_inode_cachep = kmem_cache_create("gfs2_inode", 82 sizeof(struct gfs2_inode), 83 0, SLAB_RECLAIM_ACCOUNT| 84 SLAB_MEM_SPREAD, 85 gfs2_init_inode_once); 86 if (!gfs2_inode_cachep) 87 goto fail; 88 89 gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata", 90 sizeof(struct gfs2_bufdata), 91 0, 0, NULL); 92 if (!gfs2_bufdata_cachep) 93 goto fail; 94 95 gfs2_rgrpd_cachep = kmem_cache_create("gfs2_rgrpd", 96 sizeof(struct gfs2_rgrpd), 97 0, 0, NULL); 98 if (!gfs2_rgrpd_cachep) 99 goto fail; 100 101 gfs2_quotad_cachep = kmem_cache_create("gfs2_quotad", 102 sizeof(struct gfs2_quota_data), 103 0, 0, NULL); 104 if (!gfs2_quotad_cachep) 105 goto fail; 106 107 register_shrinker(&qd_shrinker); 108 109 error = register_filesystem(&gfs2_fs_type); 110 if (error) 111 goto fail; 112 113 error = register_filesystem(&gfs2meta_fs_type); 114 if (error) 115 goto fail_unregister; 116 117 error = slow_work_register_user(); 118 if (error) 119 goto fail_slow; 120 121 gfs2_register_debugfs(); 122 123 printk("GFS2 (built %s %s) installed\n", __DATE__, __TIME__); 124 125 return 0; 126 127 fail_slow: 128 unregister_filesystem(&gfs2meta_fs_type); 129 fail_unregister: 130 unregister_filesystem(&gfs2_fs_type); 131 fail: 132 unregister_shrinker(&qd_shrinker); 133 gfs2_glock_exit(); 134 135 if (gfs2_quotad_cachep) 136 kmem_cache_destroy(gfs2_quotad_cachep); 137 138 if (gfs2_rgrpd_cachep) 139 kmem_cache_destroy(gfs2_rgrpd_cachep); 140 141 if (gfs2_bufdata_cachep) 142 kmem_cache_destroy(gfs2_bufdata_cachep); 143 144 if (gfs2_inode_cachep) 145 kmem_cache_destroy(gfs2_inode_cachep); 146 147 if (gfs2_glock_cachep) 148 kmem_cache_destroy(gfs2_glock_cachep); 149 150 gfs2_sys_uninit(); 151 return error; 152 } 153 154 /** 155 * exit_gfs2_fs - Unregister the file system 156 * 157 */ 158 159 static void __exit exit_gfs2_fs(void) 160 { 161 unregister_shrinker(&qd_shrinker); 162 gfs2_glock_exit(); 163 gfs2_unregister_debugfs(); 164 unregister_filesystem(&gfs2_fs_type); 165 unregister_filesystem(&gfs2meta_fs_type); 166 slow_work_unregister_user(); 167 168 kmem_cache_destroy(gfs2_quotad_cachep); 169 kmem_cache_destroy(gfs2_rgrpd_cachep); 170 kmem_cache_destroy(gfs2_bufdata_cachep); 171 kmem_cache_destroy(gfs2_inode_cachep); 172 kmem_cache_destroy(gfs2_glock_cachep); 173 174 gfs2_sys_uninit(); 175 } 176 177 MODULE_DESCRIPTION("Global File System"); 178 MODULE_AUTHOR("Red Hat, Inc."); 179 MODULE_LICENSE("GPL"); 180 181 module_init(init_gfs2_fs); 182 module_exit(exit_gfs2_fs); 183 184