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 if (flags & SLAB_CTOR_CONSTRUCTOR) { 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 38 static void gfs2_init_glock_once(void *foo, struct kmem_cache *cachep, unsigned long flags) 39 { 40 struct gfs2_glock *gl = foo; 41 if (flags & SLAB_CTOR_CONSTRUCTOR) { 42 INIT_HLIST_NODE(&gl->gl_list); 43 spin_lock_init(&gl->gl_spin); 44 INIT_LIST_HEAD(&gl->gl_holders); 45 INIT_LIST_HEAD(&gl->gl_waiters1); 46 INIT_LIST_HEAD(&gl->gl_waiters3); 47 gl->gl_lvb = NULL; 48 atomic_set(&gl->gl_lvb_count, 0); 49 INIT_LIST_HEAD(&gl->gl_reclaim); 50 INIT_LIST_HEAD(&gl->gl_ail_list); 51 atomic_set(&gl->gl_ail_count, 0); 52 } 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, NULL); 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, NULL); 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, NULL); 92 if (!gfs2_bufdata_cachep) 93 goto fail; 94 95 error = register_filesystem(&gfs2_fs_type); 96 if (error) 97 goto fail; 98 99 error = register_filesystem(&gfs2meta_fs_type); 100 if (error) 101 goto fail_unregister; 102 103 gfs2_register_debugfs(); 104 105 printk("GFS2 (built %s %s) installed\n", __DATE__, __TIME__); 106 107 return 0; 108 109 fail_unregister: 110 unregister_filesystem(&gfs2_fs_type); 111 fail: 112 if (gfs2_bufdata_cachep) 113 kmem_cache_destroy(gfs2_bufdata_cachep); 114 115 if (gfs2_inode_cachep) 116 kmem_cache_destroy(gfs2_inode_cachep); 117 118 if (gfs2_glock_cachep) 119 kmem_cache_destroy(gfs2_glock_cachep); 120 121 gfs2_sys_uninit(); 122 return error; 123 } 124 125 /** 126 * exit_gfs2_fs - Unregister the file system 127 * 128 */ 129 130 static void __exit exit_gfs2_fs(void) 131 { 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