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
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 struct afs_uuid afs_uuid;
33 struct workqueue_struct *afs_wq;
34
35 /*
36 * get a client UUID
37 */
afs_get_client_UUID(void)38 static int __init afs_get_client_UUID(void)
39 {
40 struct timespec ts;
41 u64 uuidtime;
42 u16 clockseq;
43 int ret;
44
45 /* read the MAC address of one of the external interfaces and construct
46 * a UUID from it */
47 ret = afs_get_MAC_address(afs_uuid.node, sizeof(afs_uuid.node));
48 if (ret < 0)
49 return ret;
50
51 getnstimeofday(&ts);
52 uuidtime = (u64) ts.tv_sec * 1000 * 1000 * 10;
53 uuidtime += ts.tv_nsec / 100;
54 uuidtime += AFS_UUID_TO_UNIX_TIME;
55 afs_uuid.time_low = uuidtime;
56 afs_uuid.time_mid = uuidtime >> 32;
57 afs_uuid.time_hi_and_version = (uuidtime >> 48) & AFS_UUID_TIMEHI_MASK;
58 afs_uuid.time_hi_and_version = AFS_UUID_VERSION_TIME;
59
60 get_random_bytes(&clockseq, 2);
61 afs_uuid.clock_seq_low = clockseq;
62 afs_uuid.clock_seq_hi_and_reserved =
63 (clockseq >> 8) & AFS_UUID_CLOCKHI_MASK;
64 afs_uuid.clock_seq_hi_and_reserved = AFS_UUID_VARIANT_STD;
65
66 _debug("AFS UUID: %08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x",
67 afs_uuid.time_low,
68 afs_uuid.time_mid,
69 afs_uuid.time_hi_and_version,
70 afs_uuid.clock_seq_hi_and_reserved,
71 afs_uuid.clock_seq_low,
72 afs_uuid.node[0], afs_uuid.node[1], afs_uuid.node[2],
73 afs_uuid.node[3], afs_uuid.node[4], afs_uuid.node[5]);
74
75 return 0;
76 }
77
78 /*
79 * initialise the AFS client FS module
80 */
afs_init(void)81 static int __init afs_init(void)
82 {
83 int ret;
84
85 printk(KERN_INFO "kAFS: Red Hat AFS client v0.1 registering.\n");
86
87 ret = afs_get_client_UUID();
88 if (ret < 0)
89 return ret;
90
91 /* create workqueue */
92 ret = -ENOMEM;
93 afs_wq = alloc_workqueue("afs", 0, 0);
94 if (!afs_wq)
95 return ret;
96
97 /* register the /proc stuff */
98 ret = afs_proc_init();
99 if (ret < 0)
100 goto error_proc;
101
102 #ifdef CONFIG_AFS_FSCACHE
103 /* we want to be able to cache */
104 ret = fscache_register_netfs(&afs_cache_netfs);
105 if (ret < 0)
106 goto error_cache;
107 #endif
108
109 /* initialise the cell DB */
110 ret = afs_cell_init(rootcell);
111 if (ret < 0)
112 goto error_cell_init;
113
114 /* initialise the VL update process */
115 ret = afs_vlocation_update_init();
116 if (ret < 0)
117 goto error_vl_update_init;
118
119 /* initialise the callback update process */
120 ret = afs_callback_update_init();
121 if (ret < 0)
122 goto error_callback_update_init;
123
124 /* create the RxRPC transport */
125 ret = afs_open_socket();
126 if (ret < 0)
127 goto error_open_socket;
128
129 /* register the filesystems */
130 ret = afs_fs_init();
131 if (ret < 0)
132 goto error_fs;
133
134 return ret;
135
136 error_fs:
137 afs_close_socket();
138 error_open_socket:
139 afs_callback_update_kill();
140 error_callback_update_init:
141 afs_vlocation_purge();
142 error_vl_update_init:
143 afs_cell_purge();
144 error_cell_init:
145 #ifdef CONFIG_AFS_FSCACHE
146 fscache_unregister_netfs(&afs_cache_netfs);
147 error_cache:
148 #endif
149 afs_proc_cleanup();
150 error_proc:
151 destroy_workqueue(afs_wq);
152 rcu_barrier();
153 printk(KERN_ERR "kAFS: failed to register: %d\n", ret);
154 return ret;
155 }
156
157 /* XXX late_initcall is kludgy, but the only alternative seems to create
158 * a transport upon the first mount, which is worse. Or is it?
159 */
160 late_initcall(afs_init); /* must be called after net/ to create socket */
161
162 /*
163 * clean up on module removal
164 */
afs_exit(void)165 static void __exit afs_exit(void)
166 {
167 printk(KERN_INFO "kAFS: Red Hat AFS client v0.1 unregistering.\n");
168
169 afs_fs_exit();
170 afs_kill_lock_manager();
171 afs_close_socket();
172 afs_purge_servers();
173 afs_callback_update_kill();
174 afs_vlocation_purge();
175 destroy_workqueue(afs_wq);
176 afs_cell_purge();
177 #ifdef CONFIG_AFS_FSCACHE
178 fscache_unregister_netfs(&afs_cache_netfs);
179 #endif
180 afs_proc_cleanup();
181 rcu_barrier();
182 }
183
184 module_exit(afs_exit);
185