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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
148/* XXX late_initcall is kludgy, but the only alternative seems to create
149 * a transport upon the first mount, which is worse. Or is it?
150 */
151late_initcall(afs_init); /* must be called after net/ to create socket */
152
153/*
154 * clean up on module removal
155 */
156static void __exit afs_exit(void)
157{
158 printk(KERN_INFO "kAFS: Red Hat AFS client v0.1 unregistering.\n");
159
160 afs_fs_exit();
161 afs_kill_lock_manager();
162 afs_close_socket();
163 afs_purge_servers();
164 afs_callback_update_kill();
165 afs_vlocation_purge();
166 flush_scheduled_work();
167 afs_cell_purge();
168#ifdef CONFIG_AFS_FSCACHE
169 fscache_unregister_netfs(&afs_cache_netfs);
170#endif
171 afs_proc_cleanup();
172 rcu_barrier();
173}
174
175module_exit(afs_exit);