text: /* AFS client file system
   *
   * Copyright (C) 2002,5 Red Hat, Inc. All Rights Reserved.
   * Written by David Howells (dhowells@redhat.com)
   *
   * This program is free software; you can redistribute it and/or
   * modify it under the terms of the GNU General Public License
   * as published by the Free Software Foundation; either version
   * 2 of the License, or (at your option) any later version.
   */
  
  #include <linux/module.h>
  #include <linux/moduleparam.h>
  #include <linux/init.h>
  #include <linux/completion.h>
  #include <linux/sched.h>
  #include "internal.h"
  
  MODULE_DESCRIPTION("AFS Client File System");
  MODULE_AUTHOR("Red Hat, Inc.");
  MODULE_LICENSE("GPL");
  
  unsigned afs_debug;
  module_param_named(debug, afs_debug, uint, S_IWUSR | S_IRUGO);
  MODULE_PARM_DESC(debug, "AFS debugging mask");
  
  static char *rootcell;
  
  module_param(rootcell, charp, 0);
  MODULE_PARM_DESC(rootcell, "root AFS cell name and VL server IP addr list");
  
  struct afs_uuid afs_uuid;
  
  /*
   * get a client UUID
   */
  static int __init afs_get_client_UUID(void)
  {
  	struct timespec ts;
  	u64 uuidtime;
  	u16 clockseq;
  	int ret;
  
  	/* read the MAC address of one of the external interfaces and construct
  	 * a UUID from it */
  	ret = afs_get_MAC_address(afs_uuid.node, sizeof(afs_uuid.node));
  	if (ret < 0)
  		return ret;
  
  	getnstimeofday(&ts);
  	uuidtime = (u64) ts.tv_sec * 1000 * 1000 * 10;
  	uuidtime += ts.tv_nsec / 100;
  	uuidtime += AFS_UUID_TO_UNIX_TIME;
  	afs_uuid.time_low = uuidtime;
  	afs_uuid.time_mid = uuidtime >> 32;
  	afs_uuid.time_hi_and_version = (uuidtime >> 48) & AFS_UUID_TIMEHI_MASK;
  	afs_uuid.time_hi_and_version = AFS_UUID_VERSION_TIME;
  
  	get_random_bytes(&clockseq, 2);
  	afs_uuid.clock_seq_low = clockseq;
  	afs_uuid.clock_seq_hi_and_reserved =
  		(clockseq >> 8) & AFS_UUID_CLOCKHI_MASK;
  	afs_uuid.clock_seq_hi_and_reserved = AFS_UUID_VARIANT_STD;
  
  	_debug("AFS UUID: %08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x",
  	       afs_uuid.time_low,
  	       afs_uuid.time_mid,
  	       afs_uuid.time_hi_and_version,
  	       afs_uuid.clock_seq_hi_and_reserved,
  	       afs_uuid.clock_seq_low,
  	       afs_uuid.node[0], afs_uuid.node[1], afs_uuid.node[2],
  	       afs_uuid.node[3], afs_uuid.node[4], afs_uuid.node[5]);
  
  	return 0;
  }
  
  /*
   * initialise the AFS client FS module
   */
  static int __init afs_init(void)
  {
  	int ret;
  
  	printk(KERN_INFO "kAFS: Red Hat AFS client v0.1 registering.\n");
  
  	ret = afs_get_client_UUID();
  	if (ret < 0)
  		return ret;
  
  	/* register the /proc stuff */
  	ret = afs_proc_init();
  	if (ret < 0)
  		return ret;
  
  #ifdef CONFIG_AFS_FSCACHE
  	/* we want to be able to cache */
  	ret = fscache_register_netfs(&afs_cache_netfs);
  	if (ret < 0)
  		goto error_cache;
  #endif
  
  	/* initialise the cell DB */
  	ret = afs_cell_init(rootcell);
  	if (ret < 0)
  		goto error_cell_init;
  
  	/* initialise the VL update process */
  	ret = afs_vlocation_update_init();
  	if (ret < 0)
  		goto error_vl_update_init;
  
  	/* initialise the callback update process */
  	ret = afs_callback_update_init();
  
  	/* create the RxRPC transport */
  	ret = afs_open_socket();
  	if (ret < 0)
  		goto error_open_socket;
  
  	/* register the filesystems */
  	ret = afs_fs_init();
  	if (ret < 0)
  		goto error_fs;
  
  	return ret;
  
  error_fs:
  	afs_close_socket();
  error_open_socket:
  error_vl_update_init:
  error_cell_init:
  #ifdef CONFIG_AFS_FSCACHE
  	fscache_unregister_netfs(&afs_cache_netfs);
  error_cache:
  #endif
  	afs_callback_update_kill();
  	afs_vlocation_purge();
  	afs_cell_purge();
  	afs_proc_cleanup();
  	rcu_barrier();
  	printk(KERN_ERR "kAFS: failed to register: %d\n", ret);
  	return ret;
  }
  
  /* XXX late_initcall is kludgy, but the only alternative seems to create
   * a transport upon the first mount, which is worse. Or is it?
   */
  late_initcall(afs_init);	/* must be called after net/ to create socket */
  
  /*
   * clean up on module removal
   */
  static void __exit afs_exit(void)
  {
  	printk(KERN_INFO "kAFS: Red Hat AFS client v0.1 unregistering.\n");
  
  	afs_fs_exit();
  	afs_kill_lock_manager();
  	afs_close_socket();
  	afs_purge_servers();
  	afs_callback_update_kill();
  	afs_vlocation_purge();
  	flush_scheduled_work();
  	afs_cell_purge();
  #ifdef CONFIG_AFS_FSCACHE
  	fscache_unregister_netfs(&afs_cache_netfs);
  #endif
  	afs_proc_cleanup();
  	rcu_barrier();
  }
  
  module_exit(afs_exit);
  