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 "internal.h"
18
19MODULE_DESCRIPTION("AFS Client File System");
20MODULE_AUTHOR("Red Hat, Inc.");
21MODULE_LICENSE("GPL");
22
23unsigned afs_debug;
24module_param_named(debug, afs_debug, uint, S_IWUSR | S_IRUGO);
25MODULE_PARM_DESC(debug, "AFS debugging mask");
26
27static char *rootcell;
28
29module_param(rootcell, charp, 0);
30MODULE_PARM_DESC(rootcell, "root AFS cell name and VL server IP addr list");
31
32struct afs_uuid afs_uuid;
33
34/*
35 * get a client UUID
36 */
37static int __init afs_get_client_UUID(void)
38{
39	struct timespec ts;
40	u64 uuidtime;
41	u16 clockseq;
42	int ret;
43
44	/* read the MAC address of one of the external interfaces and construct
45	 * a UUID from it */
46	ret = afs_get_MAC_address(afs_uuid.node, sizeof(afs_uuid.node));
47	if (ret < 0)
48		return ret;
49
50	getnstimeofday(&ts);
51	uuidtime = (u64) ts.tv_sec * 1000 * 1000 * 10;
52	uuidtime += ts.tv_nsec / 100;
53	uuidtime += AFS_UUID_TO_UNIX_TIME;
54	afs_uuid.time_low = uuidtime;
55	afs_uuid.time_mid = uuidtime >> 32;
56	afs_uuid.time_hi_and_version = (uuidtime >> 48) & AFS_UUID_TIMEHI_MASK;
57	afs_uuid.time_hi_and_version = AFS_UUID_VERSION_TIME;
58
59	get_random_bytes(&clockseq, 2);
60	afs_uuid.clock_seq_low = clockseq;
61	afs_uuid.clock_seq_hi_and_reserved =
62		(clockseq >> 8) & AFS_UUID_CLOCKHI_MASK;
63	afs_uuid.clock_seq_hi_and_reserved = AFS_UUID_VARIANT_STD;
64
65	_debug("AFS UUID: %08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x",
66	       afs_uuid.time_low,
67	       afs_uuid.time_mid,
68	       afs_uuid.time_hi_and_version,
69	       afs_uuid.clock_seq_hi_and_reserved,
70	       afs_uuid.clock_seq_low,
71	       afs_uuid.node[0], afs_uuid.node[1], afs_uuid.node[2],
72	       afs_uuid.node[3], afs_uuid.node[4], afs_uuid.node[5]);
73
74	return 0;
75}
76
77/*
78 * initialise the AFS client FS module
79 */
80static int __init afs_init(void)
81{
82	int ret;
83
84	printk(KERN_INFO "kAFS: Red Hat AFS client v0.1 registering.\n");
85
86	ret = afs_get_client_UUID();
87	if (ret < 0)
88		return ret;
89
90	/* register the /proc stuff */
91	ret = afs_proc_init();
92	if (ret < 0)
93		return ret;
94
95#ifdef CONFIG_AFS_FSCACHE
96	/* we want to be able to cache */
97	ret = fscache_register_netfs(&afs_cache_netfs);
98	if (ret < 0)
99		goto error_cache;
100#endif
101
102	/* initialise the cell DB */
103	ret = afs_cell_init(rootcell);
104	if (ret < 0)
105		goto error_cell_init;
106
107	/* initialise the VL update process */
108	ret = afs_vlocation_update_init();
109	if (ret < 0)
110		goto error_vl_update_init;
111
112	/* initialise the callback update process */
113	ret = afs_callback_update_init();
114	if (ret < 0)
115		goto error_callback_update_init;
116
117	/* create the RxRPC transport */
118	ret = afs_open_socket();
119	if (ret < 0)
120		goto error_open_socket;
121
122	/* register the filesystems */
123	ret = afs_fs_init();
124	if (ret < 0)
125		goto error_fs;
126
127	return ret;
128
129error_fs:
130	afs_close_socket();
131error_open_socket:
132	afs_callback_update_kill();
133error_callback_update_init:
134	afs_vlocation_purge();
135error_vl_update_init:
136	afs_cell_purge();
137error_cell_init:
138#ifdef CONFIG_AFS_FSCACHE
139	fscache_unregister_netfs(&afs_cache_netfs);
140error_cache:
141#endif
142	afs_proc_cleanup();
143	rcu_barrier();
144	printk(KERN_ERR "kAFS: failed to register: %d\n", ret);
145	return ret;
146}
147
148late_initcall(afs_init);	/* must be called after net/ to create socket */
149
150/*
151 * clean up on module removal
152 */
153static void __exit afs_exit(void)
154{
155	printk(KERN_INFO "kAFS: Red Hat AFS client v0.1 unregistering.\n");
156
157	afs_fs_exit();
158	afs_kill_lock_manager();
159	afs_close_socket();
160	afs_purge_servers();
161	afs_callback_update_kill();
162	afs_vlocation_purge();
163	flush_scheduled_work();
164	afs_cell_purge();
165#ifdef CONFIG_AFS_FSCACHE
166	fscache_unregister_netfs(&afs_cache_netfs);
167#endif
168	afs_proc_cleanup();
169	rcu_barrier();
170}
171
172module_exit(afs_exit);
173