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 "ops_fstype.h" 23 #include "sys.h" 24 #include "util.h" 25 #include "glock.h" 26 27 static void gfs2_init_inode_once(struct kmem_cache *cachep, 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 ip->i_alloc = NULL; 34 } 35 36 static void gfs2_init_glock_once(struct kmem_cache *cachep, void *foo) 37 { 38 struct gfs2_glock *gl = foo; 39 40 INIT_HLIST_NODE(&gl->gl_list); 41 spin_lock_init(&gl->gl_spin); 42 INIT_LIST_HEAD(&gl->gl_holders); 43 INIT_LIST_HEAD(&gl->gl_waiters1); 44 INIT_LIST_HEAD(&gl->gl_waiters3); 45 gl->gl_lvb = NULL; 46 atomic_set(&gl->gl_lvb_count, 0); 47 INIT_LIST_HEAD(&gl->gl_reclaim); 48 INIT_LIST_HEAD(&gl->gl_ail_list); 49 atomic_set(&gl->gl_ail_count, 0); 50 } 51 52 /** 53 * init_gfs2_fs - Register GFS2 as a filesystem 54 * 55 * Returns: 0 on success, error code on failure 56 */ 57 58 static int __init init_gfs2_fs(void) 59 { 60 int error; 61 62 error = gfs2_sys_init(); 63 if (error) 64 return error; 65 66 error = gfs2_glock_init(); 67 if (error) 68 goto fail; 69 70 error = -ENOMEM; 71 gfs2_glock_cachep = kmem_cache_create("gfs2_glock", 72 sizeof(struct gfs2_glock), 73 0, 0, 74 gfs2_init_glock_once); 75 if (!gfs2_glock_cachep) 76 goto fail; 77 78 gfs2_inode_cachep = kmem_cache_create("gfs2_inode", 79 sizeof(struct gfs2_inode), 80 0, SLAB_RECLAIM_ACCOUNT| 81 SLAB_MEM_SPREAD, 82 gfs2_init_inode_once); 83 if (!gfs2_inode_cachep) 84 goto fail; 85 86 gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata", 87 sizeof(struct gfs2_bufdata), 88 0, 0, NULL); 89 if (!gfs2_bufdata_cachep) 90 goto fail; 91 92 error = register_filesystem(&gfs2_fs_type); 93 if (error) 94 goto fail; 95 96 error = register_filesystem(&gfs2meta_fs_type); 97 if (error) 98 goto fail_unregister; 99 100 gfs2_register_debugfs(); 101 102 printk("GFS2 (built %s %s) installed\n", __DATE__, __TIME__); 103 104 return 0; 105 106 fail_unregister: 107 unregister_filesystem(&gfs2_fs_type); 108 fail: 109 gfs2_glock_exit(); 110 111 if (gfs2_bufdata_cachep) 112 kmem_cache_destroy(gfs2_bufdata_cachep); 113 114 if (gfs2_inode_cachep) 115 kmem_cache_destroy(gfs2_inode_cachep); 116 117 if (gfs2_glock_cachep) 118 kmem_cache_destroy(gfs2_glock_cachep); 119 120 gfs2_sys_uninit(); 121 return error; 122 } 123 124 /** 125 * exit_gfs2_fs - Unregister the file system 126 * 127 */ 128 129 static void __exit exit_gfs2_fs(void) 130 { 131 gfs2_glock_exit(); 132 gfs2_unregister_debugfs(); 133 unregister_filesystem(&gfs2_fs_type); 134 unregister_filesystem(&gfs2meta_fs_type); 135 136 kmem_cache_destroy(gfs2_bufdata_cachep); 137 kmem_cache_destroy(gfs2_inode_cachep); 138 kmem_cache_destroy(gfs2_glock_cachep); 139 140 gfs2_sys_uninit(); 141 } 142 143 MODULE_DESCRIPTION("Global File System"); 144 MODULE_AUTHOR("Red Hat, Inc."); 145 MODULE_LICENSE("GPL"); 146 147 module_init(init_gfs2_fs); 148 module_exit(exit_gfs2_fs); 149 150