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
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(afs_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
32#ifdef AFS_CACHING_SUPPORT
33static struct cachefs_netfs_operations afs_cache_ops = {
34	.get_page_cookie	= afs_cache_get_page_cookie,
35};
36
37struct cachefs_netfs afs_cache_netfs = {
38	.name			= "afs",
39	.version		= 0,
40	.ops			= &afs_cache_ops,
41};
42#endif
43
44struct afs_uuid afs_uuid;
45
46/*
47 * get a client UUID
48 */
49static 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 */
92static 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
140error_fs:
141	afs_close_socket();
142error_open_socket:
143error_vl_update_init:
144error_cell_init:
145#ifdef AFS_CACHING_SUPPORT
146	cachefs_unregister_netfs(&afs_cache_netfs);
147error_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
158late_initcall(afs_init);	/* must be called after net/ to create socket */
159
160/*
161 * clean up on module removal
162 */
163static void __exit afs_exit(void)
164{
165	printk(KERN_INFO "kAFS: Red Hat AFS client v0.1 unregistering.\n");
166
167	afs_fs_exit();
168	afs_close_socket();
169	afs_purge_servers();
170	afs_callback_update_kill();
171	afs_vlocation_purge();
172	flush_scheduled_work();
173	afs_cell_purge();
174#ifdef AFS_CACHING_SUPPORT
175	cachefs_unregister_netfs(&afs_cache_netfs);
176#endif
177	afs_proc_cleanup();
178	rcu_barrier();
179}
180
181module_exit(afs_exit);
182