Linux 2.6.31.6
[linux/fpc-iii.git] / fs / afs / main.c
blob66d54d348c55f2c232bd362f1b432ab242d4256b
1 /* AFS client file system
3 * Copyright (C) 2002,5 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
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.
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"
19 MODULE_DESCRIPTION("AFS Client File System");
20 MODULE_AUTHOR("Red Hat, Inc.");
21 MODULE_LICENSE("GPL");
23 unsigned afs_debug;
24 module_param_named(debug, afs_debug, uint, S_IWUSR | S_IRUGO);
25 MODULE_PARM_DESC(debug, "AFS debugging mask");
27 static char *rootcell;
29 module_param(rootcell, charp, 0);
30 MODULE_PARM_DESC(rootcell, "root AFS cell name and VL server IP addr list");
32 struct afs_uuid afs_uuid;
35 * get a client UUID
37 static int __init afs_get_client_UUID(void)
39 struct timespec ts;
40 u64 uuidtime;
41 u16 clockseq;
42 int ret;
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;
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;
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;
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]);
74 return 0;
78 * initialise the AFS client FS module
80 static int __init afs_init(void)
82 int ret;
84 printk(KERN_INFO "kAFS: Red Hat AFS client v0.1 registering.\n");
86 ret = afs_get_client_UUID();
87 if (ret < 0)
88 return ret;
90 /* register the /proc stuff */
91 ret = afs_proc_init();
92 if (ret < 0)
93 return ret;
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
102 /* initialise the cell DB */
103 ret = afs_cell_init(rootcell);
104 if (ret < 0)
105 goto error_cell_init;
107 /* initialise the VL update process */
108 ret = afs_vlocation_update_init();
109 if (ret < 0)
110 goto error_vl_update_init;
112 /* initialise the callback update process */
113 ret = afs_callback_update_init();
115 /* create the RxRPC transport */
116 ret = afs_open_socket();
117 if (ret < 0)
118 goto error_open_socket;
120 /* register the filesystems */
121 ret = afs_fs_init();
122 if (ret < 0)
123 goto error_fs;
125 return ret;
127 error_fs:
128 afs_close_socket();
129 error_open_socket:
130 error_vl_update_init:
131 error_cell_init:
132 #ifdef CONFIG_AFS_FSCACHE
133 fscache_unregister_netfs(&afs_cache_netfs);
134 error_cache:
135 #endif
136 afs_callback_update_kill();
137 afs_vlocation_purge();
138 afs_cell_purge();
139 afs_proc_cleanup();
140 rcu_barrier();
141 printk(KERN_ERR "kAFS: failed to register: %d\n", ret);
142 return ret;
145 /* XXX late_initcall is kludgy, but the only alternative seems to create
146 * a transport upon the first mount, which is worse. Or is it?
148 late_initcall(afs_init); /* must be called after net/ to create socket */
151 * clean up on module removal
153 static void __exit afs_exit(void)
155 printk(KERN_INFO "kAFS: Red Hat AFS client v0.1 unregistering.\n");
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();
172 module_exit(afs_exit);