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/lm_interface.h> 18 #include <asm/atomic.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 27 static void gfs2_init_inode_once(void *foo) 28 { 29 struct gfs2_inode *ip = foo; 30 31 inode_init_once(&ip->i_inode); 32 init_rwsem(&ip->i_rw_mutex); 33 INIT_LIST_HEAD(&ip->i_trunc_list); 34 ip->i_alloc = NULL; 35 } 36 37 static void gfs2_init_glock_once(void *foo) 38 { 39 struct gfs2_glock *gl = foo; 40 41 INIT_HLIST_NODE(&gl->gl_list); 42 spin_lock_init(&gl->gl_spin); 43 INIT_LIST_HEAD(&gl->gl_holders); 44 gl->gl_lvb = NULL; 45 atomic_set(&gl->gl_lvb_count, 0); 46 INIT_LIST_HEAD(&gl->gl_lru); 47 INIT_LIST_HEAD(&gl->gl_ail_list); 48 atomic_set(&gl->gl_ail_count, 0); 49 } 50 51 /** 52 * init_gfs2_fs - Register GFS2 as a filesystem 53 * 54 * Returns: 0 on success, error code on failure 55 */ 56 57 static int __init init_gfs2_fs(void) 58 { 59 int error; 60 61 error = gfs2_sys_init(); 62 if (error) 63 return error; 64 65 error = gfs2_glock_init(); 66 if (error) 67 goto fail; 68 69 error = -ENOMEM; 70 gfs2_glock_cachep = kmem_cache_create("gfs2_glock", 71 sizeof(struct gfs2_glock), 72 0, 0, 73 gfs2_init_glock_once); 74 if (!gfs2_glock_cachep) 75 goto fail; 76 77 gfs2_inode_cachep = kmem_cache_create("gfs2_inode", 78 sizeof(struct gfs2_inode), 79 0, SLAB_RECLAIM_ACCOUNT| 80 SLAB_MEM_SPREAD, 81 gfs2_init_inode_once); 82 if (!gfs2_inode_cachep) 83 goto fail; 84 85 gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata", 86 sizeof(struct gfs2_bufdata), 87 0, 0, NULL); 88 if (!gfs2_bufdata_cachep) 89 goto fail; 90 91 gfs2_rgrpd_cachep = kmem_cache_create("gfs2_rgrpd", 92 sizeof(struct gfs2_rgrpd), 93 0, 0, NULL); 94 if (!gfs2_rgrpd_cachep) 95 goto fail; 96 97 gfs2_quotad_cachep = kmem_cache_create("gfs2_quotad", 98 sizeof(struct gfs2_quota_data), 99 0, 0, NULL); 100 if (!gfs2_quotad_cachep) 101 goto fail; 102 103 error = register_filesystem(&gfs2_fs_type); 104 if (error) 105 goto fail; 106 107 error = register_filesystem(&gfs2meta_fs_type); 108 if (error) 109 goto fail_unregister; 110 111 gfs2_register_debugfs(); 112 113 printk("GFS2 (built %s %s) installed\n", __DATE__, __TIME__); 114 115 return 0; 116 117 fail_unregister: 118 unregister_filesystem(&gfs2_fs_type); 119 fail: 120 gfs2_glock_exit(); 121 122 if (gfs2_quotad_cachep) 123 kmem_cache_destroy(gfs2_quotad_cachep); 124 125 if (gfs2_rgrpd_cachep) 126 kmem_cache_destroy(gfs2_rgrpd_cachep); 127 128 if (gfs2_bufdata_cachep) 129 kmem_cache_destroy(gfs2_bufdata_cachep); 130 131 if (gfs2_inode_cachep) 132 kmem_cache_destroy(gfs2_inode_cachep); 133 134 if (gfs2_glock_cachep) 135 kmem_cache_destroy(gfs2_glock_cachep); 136 137 gfs2_sys_uninit(); 138 return error; 139 } 140 141 /** 142 * exit_gfs2_fs - Unregister the file system 143 * 144 */ 145 146 static void __exit exit_gfs2_fs(void) 147 { 148 gfs2_glock_exit(); 149 gfs2_unregister_debugfs(); 150 unregister_filesystem(&gfs2_fs_type); 151 unregister_filesystem(&gfs2meta_fs_type); 152 153 kmem_cache_destroy(gfs2_quotad_cachep); 154 kmem_cache_destroy(gfs2_rgrpd_cachep); 155 kmem_cache_destroy(gfs2_bufdata_cachep); 156 kmem_cache_destroy(gfs2_inode_cachep); 157 kmem_cache_destroy(gfs2_glock_cachep); 158 159 gfs2_sys_uninit(); 160 } 161 162 MODULE_DESCRIPTION("Global File System"); 163 MODULE_AUTHOR("Red Hat, Inc."); 164 MODULE_LICENSE("GPL"); 165 166 module_init(init_gfs2_fs); 167 module_exit(exit_gfs2_fs); 168 169