1 /* AFS client file system 2 * 3 * Copyright (C) 2002 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 "internal.h" 18 19 MODULE_DESCRIPTION("AFS Client File System"); 20 MODULE_AUTHOR("Red Hat, Inc."); 21 MODULE_LICENSE("GPL"); 22 23 unsigned afs_debug; 24 module_param_named(debug, afs_debug, uint, S_IWUSR | S_IRUGO); 25 MODULE_PARM_DESC(debug, "AFS debugging mask"); 26 27 static char *rootcell; 28 29 module_param(rootcell, charp, 0); 30 MODULE_PARM_DESC(rootcell, "root AFS cell name and VL server IP addr list"); 31 32 #ifdef AFS_CACHING_SUPPORT 33 static struct cachefs_netfs_operations afs_cache_ops = { 34 .get_page_cookie = afs_cache_get_page_cookie, 35 }; 36 37 struct cachefs_netfs afs_cache_netfs = { 38 .name = "afs", 39 .version = 0, 40 .ops = &afs_cache_ops, 41 }; 42 #endif 43 44 struct afs_uuid afs_uuid; 45 46 /* 47 * get a client UUID 48 */ 49 static int __init afs_get_client_UUID(void) 50 { 51 struct timespec ts; 52 u64 uuidtime; 53 u16 clockseq; 54 int ret; 55 56 /* read the MAC address of one of the external interfaces and construct 57 * a UUID from it */ 58 ret = afs_get_MAC_address(afs_uuid.node, sizeof(afs_uuid.node)); 59 if (ret < 0) 60 return ret; 61 62 getnstimeofday(&ts); 63 uuidtime = (u64) ts.tv_sec * 1000 * 1000 * 10; 64 uuidtime += ts.tv_nsec / 100; 65 uuidtime += AFS_UUID_TO_UNIX_TIME; 66 afs_uuid.time_low = uuidtime; 67 afs_uuid.time_mid = uuidtime >> 32; 68 afs_uuid.time_hi_and_version = (uuidtime >> 48) & AFS_UUID_TIMEHI_MASK; 69 afs_uuid.time_hi_and_version = AFS_UUID_VERSION_TIME; 70 71 get_random_bytes(&clockseq, 2); 72 afs_uuid.clock_seq_low = clockseq; 73 afs_uuid.clock_seq_hi_and_reserved = 74 (clockseq >> 8) & AFS_UUID_CLOCKHI_MASK; 75 afs_uuid.clock_seq_hi_and_reserved = AFS_UUID_VARIANT_STD; 76 77 _debug("AFS UUID: %08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x", 78 afs_uuid.time_low, 79 afs_uuid.time_mid, 80 afs_uuid.time_hi_and_version, 81 afs_uuid.clock_seq_hi_and_reserved, 82 afs_uuid.clock_seq_low, 83 afs_uuid.node[0], afs_uuid.node[1], afs_uuid.node[2], 84 afs_uuid.node[3], afs_uuid.node[4], afs_uuid.node[5]); 85 86 return 0; 87 } 88 89 /* 90 * initialise the AFS client FS module 91 */ 92 static int __init afs_init(void) 93 { 94 int ret; 95 96 printk(KERN_INFO "kAFS: Red Hat AFS client v0.1 registering.\n"); 97 98 ret = afs_get_client_UUID(); 99 if (ret < 0) 100 return ret; 101 102 /* register the /proc stuff */ 103 ret = afs_proc_init(); 104 if (ret < 0) 105 return ret; 106 107 #ifdef AFS_CACHING_SUPPORT 108 /* we want to be able to cache */ 109 ret = cachefs_register_netfs(&afs_cache_netfs, 110 &afs_cache_cell_index_def); 111 if (ret < 0) 112 goto error_cache; 113 #endif 114 115 /* initialise the cell DB */ 116 ret = afs_cell_init(rootcell); 117 if (ret < 0) 118 goto error_cell_init; 119 120 /* initialise the VL update process */ 121 ret = afs_vlocation_update_init(); 122 if (ret < 0) 123 goto error_vl_update_init; 124 125 /* initialise the callback update process */ 126 ret = afs_callback_update_init(); 127 128 /* create the RxRPC transport */ 129 ret = afs_open_socket(); 130 if (ret < 0) 131 goto error_open_socket; 132 133 /* register the filesystems */ 134 ret = afs_fs_init(); 135 if (ret < 0) 136 goto error_fs; 137 138 return ret; 139 140 error_fs: 141 afs_close_socket(); 142 error_open_socket: 143 error_vl_update_init: 144 error_cell_init: 145 #ifdef AFS_CACHING_SUPPORT 146 cachefs_unregister_netfs(&afs_cache_netfs); 147 error_cache: 148 #endif 149 afs_callback_update_kill(); 150 afs_vlocation_purge(); 151 afs_cell_purge(); 152 afs_proc_cleanup(); 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 flush_scheduled_work(); 177 afs_cell_purge(); 178 #ifdef AFS_CACHING_SUPPORT 179 cachefs_unregister_netfs(&afs_cache_netfs); 180 #endif 181 afs_proc_cleanup(); 182 rcu_barrier(); 183 } 184 185 module_exit(afs_exit); 186