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/sched.h> 11 #include <linux/slab.h> 12 #include <linux/spinlock.h> 13 #include <linux/completion.h> 14 #include <linux/buffer_head.h> 15 #include <linux/module.h> 16 #include <linux/init.h> 17 #include <linux/gfs2_ondisk.h> 18 #include <asm/atomic.h> 19 20 #include "gfs2.h" 21 #include "lm_interface.h" 22 #include "incore.h" 23 #include "ops_fstype.h" 24 #include "sys.h" 25 #include "util.h" 26 27 static void gfs2_init_inode_once(void *foo, kmem_cache_t *cachep, unsigned long flags) 28 { 29 struct gfs2_inode *ip = foo; 30 if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) == 31 SLAB_CTOR_CONSTRUCTOR) { 32 inode_init_once(&ip->i_inode); 33 spin_lock_init(&ip->i_spin); 34 init_rwsem(&ip->i_rw_mutex); 35 memset(ip->i_cache, 0, sizeof(ip->i_cache)); 36 } 37 } 38 39 static void gfs2_init_glock_once(void *foo, kmem_cache_t *cachep, unsigned long flags) 40 { 41 struct gfs2_glock *gl = foo; 42 if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) == 43 SLAB_CTOR_CONSTRUCTOR) { 44 INIT_LIST_HEAD(&gl->gl_list); 45 spin_lock_init(&gl->gl_spin); 46 INIT_LIST_HEAD(&gl->gl_holders); 47 INIT_LIST_HEAD(&gl->gl_waiters1); 48 INIT_LIST_HEAD(&gl->gl_waiters2); 49 INIT_LIST_HEAD(&gl->gl_waiters3); 50 gl->gl_lvb = NULL; 51 atomic_set(&gl->gl_lvb_count, 0); 52 INIT_LIST_HEAD(&gl->gl_reclaim); 53 INIT_LIST_HEAD(&gl->gl_ail_list); 54 atomic_set(&gl->gl_ail_count, 0); 55 } 56 } 57 58 /** 59 * init_gfs2_fs - Register GFS2 as a filesystem 60 * 61 * Returns: 0 on success, error code on failure 62 */ 63 64 static int __init init_gfs2_fs(void) 65 { 66 int error; 67 68 gfs2_init_lmh(); 69 70 error = gfs2_sys_init(); 71 if (error) 72 return error; 73 74 error = -ENOMEM; 75 76 gfs2_glock_cachep = kmem_cache_create("gfs2_glock", 77 sizeof(struct gfs2_glock), 78 0, 0, 79 gfs2_init_glock_once, NULL); 80 if (!gfs2_glock_cachep) 81 goto fail; 82 83 gfs2_inode_cachep = kmem_cache_create("gfs2_inode", 84 sizeof(struct gfs2_inode), 85 0, (SLAB_RECLAIM_ACCOUNT| 86 SLAB_PANIC|SLAB_MEM_SPREAD), 87 gfs2_init_inode_once, NULL); 88 if (!gfs2_inode_cachep) 89 goto fail; 90 91 gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata", 92 sizeof(struct gfs2_bufdata), 93 0, 0, NULL, NULL); 94 if (!gfs2_bufdata_cachep) 95 goto fail; 96 97 error = register_filesystem(&gfs2_fs_type); 98 if (error) 99 goto fail; 100 101 error = register_filesystem(&gfs2meta_fs_type); 102 if (error) 103 goto fail_unregister; 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 unregister_filesystem(&gfs2_fs_type); 133 unregister_filesystem(&gfs2meta_fs_type); 134 135 kmem_cache_destroy(gfs2_bufdata_cachep); 136 kmem_cache_destroy(gfs2_inode_cachep); 137 kmem_cache_destroy(gfs2_glock_cachep); 138 139 gfs2_sys_uninit(); 140 } 141 142 MODULE_DESCRIPTION("Global File System"); 143 MODULE_AUTHOR("Red Hat, Inc."); 144 MODULE_LICENSE("GPL"); 145 146 module_init(init_gfs2_fs); 147 module_exit(exit_gfs2_fs); 148 149