1 /* AFS client file system 2 * 3 * Copyright (C) 2002,5 Red Hat, Inc. All Rights Reserved. 4 * Written by David Howells (dhowells@redhat.com) 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License 8 * as published by the Free Software Foundation; either version 9 * 2 of the License, or (at your option) any later version. 10 */ 11 12 #include <linux/module.h> 13 #include <linux/moduleparam.h> 14 #include <linux/init.h> 15 #include <linux/completion.h> 16 #include <linux/sched.h> 17 #include <linux/random.h> 18 #include "internal.h" 19 20 MODULE_DESCRIPTION("AFS Client File System"); 21 MODULE_AUTHOR("Red Hat, Inc."); 22 MODULE_LICENSE("GPL"); 23 24 unsigned afs_debug; 25 module_param_named(debug, afs_debug, uint, S_IWUSR | S_IRUGO); 26 MODULE_PARM_DESC(debug, "AFS debugging mask"); 27 28 static char *rootcell; 29 30 module_param(rootcell, charp, 0); 31 MODULE_PARM_DESC(rootcell, "root AFS cell name and VL server IP addr list"); 32 33 struct afs_uuid afs_uuid; 34 struct workqueue_struct *afs_wq; 35 36 /* 37 * get a client UUID 38 */ 39 static int __init afs_get_client_UUID(void) 40 { 41 struct timespec ts; 42 u64 uuidtime; 43 u16 clockseq; 44 int ret; 45 46 /* read the MAC address of one of the external interfaces and construct 47 * a UUID from it */ 48 ret = afs_get_MAC_address(afs_uuid.node, sizeof(afs_uuid.node)); 49 if (ret < 0) 50 return ret; 51 52 getnstimeofday(&ts); 53 uuidtime = (u64) ts.tv_sec * 1000 * 1000 * 10; 54 uuidtime += ts.tv_nsec / 100; 55 uuidtime += AFS_UUID_TO_UNIX_TIME; 56 afs_uuid.time_low = uuidtime; 57 afs_uuid.time_mid = uuidtime >> 32; 58 afs_uuid.time_hi_and_version = (uuidtime >> 48) & AFS_UUID_TIMEHI_MASK; 59 afs_uuid.time_hi_and_version |= AFS_UUID_VERSION_TIME; 60 61 get_random_bytes(&clockseq, 2); 62 afs_uuid.clock_seq_low = clockseq; 63 afs_uuid.clock_seq_hi_and_reserved = 64 (clockseq >> 8) & AFS_UUID_CLOCKHI_MASK; 65 afs_uuid.clock_seq_hi_and_reserved |= AFS_UUID_VARIANT_STD; 66 67 _debug("AFS UUID: %08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x", 68 afs_uuid.time_low, 69 afs_uuid.time_mid, 70 afs_uuid.time_hi_and_version, 71 afs_uuid.clock_seq_hi_and_reserved, 72 afs_uuid.clock_seq_low, 73 afs_uuid.node[0], afs_uuid.node[1], afs_uuid.node[2], 74 afs_uuid.node[3], afs_uuid.node[4], afs_uuid.node[5]); 75 76 return 0; 77 } 78 79 /* 80 * initialise the AFS client FS module 81 */ 82 static int __init afs_init(void) 83 { 84 int ret; 85 86 printk(KERN_INFO "kAFS: Red Hat AFS client v0.1 registering.\n"); 87 88 ret = afs_get_client_UUID(); 89 if (ret < 0) 90 return ret; 91 92 /* create workqueue */ 93 ret = -ENOMEM; 94 afs_wq = alloc_workqueue("afs", 0, 0); 95 if (!afs_wq) 96 return ret; 97 98 /* register the /proc stuff */ 99 ret = afs_proc_init(); 100 if (ret < 0) 101 goto error_proc; 102 103 #ifdef CONFIG_AFS_FSCACHE 104 /* we want to be able to cache */ 105 ret = fscache_register_netfs(&afs_cache_netfs); 106 if (ret < 0) 107 goto error_cache; 108 #endif 109 110 /* initialise the cell DB */ 111 ret = afs_cell_init(rootcell); 112 if (ret < 0) 113 goto error_cell_init; 114 115 /* initialise the VL update process */ 116 ret = afs_vlocation_update_init(); 117 if (ret < 0) 118 goto error_vl_update_init; 119 120 /* initialise the callback update process */ 121 ret = afs_callback_update_init(); 122 if (ret < 0) 123 goto error_callback_update_init; 124 125 /* create the RxRPC transport */ 126 ret = afs_open_socket(); 127 if (ret < 0) 128 goto error_open_socket; 129 130 /* register the filesystems */ 131 ret = afs_fs_init(); 132 if (ret < 0) 133 goto error_fs; 134 135 return ret; 136 137 error_fs: 138 afs_close_socket(); 139 error_open_socket: 140 afs_callback_update_kill(); 141 error_callback_update_init: 142 afs_vlocation_purge(); 143 error_vl_update_init: 144 afs_cell_purge(); 145 error_cell_init: 146 #ifdef CONFIG_AFS_FSCACHE 147 fscache_unregister_netfs(&afs_cache_netfs); 148 error_cache: 149 #endif 150 afs_proc_cleanup(); 151 error_proc: 152 destroy_workqueue(afs_wq); 153 rcu_barrier(); 154 printk(KERN_ERR "kAFS: failed to register: %d\n", ret); 155 return ret; 156 } 157 158 /* XXX late_initcall is kludgy, but the only alternative seems to create 159 * a transport upon the first mount, which is worse. Or is it? 160 */ 161 late_initcall(afs_init); /* must be called after net/ to create socket */ 162 163 /* 164 * clean up on module removal 165 */ 166 static void __exit afs_exit(void) 167 { 168 printk(KERN_INFO "kAFS: Red Hat AFS client v0.1 unregistering.\n"); 169 170 afs_fs_exit(); 171 afs_kill_lock_manager(); 172 afs_close_socket(); 173 afs_purge_servers(); 174 afs_callback_update_kill(); 175 afs_vlocation_purge(); 176 destroy_workqueue(afs_wq); 177 afs_cell_purge(); 178 #ifdef CONFIG_AFS_FSCACHE 179 fscache_unregister_netfs(&afs_cache_netfs); 180 #endif 181 afs_proc_cleanup(); 182 rcu_barrier(); 183 } 184 185 module_exit(afs_exit); 186