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(void *foo, struct kmem_cache *cachep, unsigned long flags) 28 { 29 struct gfs2_inode *ip = foo; 30 31 inode_init_once(&ip->i_inode); 32 spin_lock_init(&ip->i_spin); 33 init_rwsem(&ip->i_rw_mutex); 34 memset(ip->i_cache, 0, sizeof(ip->i_cache)); 35 } 36 37 static void gfs2_init_glock_once(void *foo, struct kmem_cache *cachep, unsigned long flags) 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 INIT_LIST_HEAD(&gl->gl_waiters1); 45 INIT_LIST_HEAD(&gl->gl_waiters3); 46 gl->gl_lvb = NULL; 47 atomic_set(&gl->gl_lvb_count, 0); 48 INIT_LIST_HEAD(&gl->gl_reclaim); 49 INIT_LIST_HEAD(&gl->gl_ail_list); 50 atomic_set(&gl->gl_ail_count, 0); 51 } 52 53 /** 54 * init_gfs2_fs - Register GFS2 as a filesystem 55 * 56 * Returns: 0 on success, error code on failure 57 */ 58 59 static int __init init_gfs2_fs(void) 60 { 61 int error; 62 63 error = gfs2_sys_init(); 64 if (error) 65 return error; 66 67 error = gfs2_glock_init(); 68 if (error) 69 goto fail; 70 71 error = -ENOMEM; 72 gfs2_glock_cachep = kmem_cache_create("gfs2_glock", 73 sizeof(struct gfs2_glock), 74 0, 0, 75 gfs2_init_glock_once); 76 if (!gfs2_glock_cachep) 77 goto fail; 78 79 gfs2_inode_cachep = kmem_cache_create("gfs2_inode", 80 sizeof(struct gfs2_inode), 81 0, SLAB_RECLAIM_ACCOUNT| 82 SLAB_MEM_SPREAD, 83 gfs2_init_inode_once); 84 if (!gfs2_inode_cachep) 85 goto fail; 86 87 gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata", 88 sizeof(struct gfs2_bufdata), 89 0, 0, NULL); 90 if (!gfs2_bufdata_cachep) 91 goto fail; 92 93 error = register_filesystem(&gfs2_fs_type); 94 if (error) 95 goto fail; 96 97 error = register_filesystem(&gfs2meta_fs_type); 98 if (error) 99 goto fail_unregister; 100 101 gfs2_register_debugfs(); 102 103 printk("GFS2 (built %s %s) installed\n", __DATE__, __TIME__); 104 105 return 0; 106 107 fail_unregister: 108 unregister_filesystem(&gfs2_fs_type); 109 fail: 110 if (gfs2_bufdata_cachep) 111 kmem_cache_destroy(gfs2_bufdata_cachep); 112 113 if (gfs2_inode_cachep) 114 kmem_cache_destroy(gfs2_inode_cachep); 115 116 if (gfs2_glock_cachep) 117 kmem_cache_destroy(gfs2_glock_cachep); 118 119 gfs2_sys_uninit(); 120 return error; 121 } 122 123 /** 124 * exit_gfs2_fs - Unregister the file system 125 * 126 */ 127 128 static void __exit exit_gfs2_fs(void) 129 { 130 gfs2_unregister_debugfs(); 131 unregister_filesystem(&gfs2_fs_type); 132 unregister_filesystem(&gfs2meta_fs_type); 133 134 kmem_cache_destroy(gfs2_bufdata_cachep); 135 kmem_cache_destroy(gfs2_inode_cachep); 136 kmem_cache_destroy(gfs2_glock_cachep); 137 138 gfs2_sys_uninit(); 139 } 140 141 MODULE_DESCRIPTION("Global File System"); 142 MODULE_AUTHOR("Red Hat, Inc."); 143 MODULE_LICENSE("GPL"); 144 145 module_init(init_gfs2_fs); 146 module_exit(exit_gfs2_fs); 147 148