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David Howellsec268152007-04-26 15:49:28 -07001/* AFS client file system
Linus Torvalds1da177e2005-04-16 15:20:36 -07002 *
David Howells9b3f26c2009-04-03 16:42:41 +01003 * Copyright (C) 2002,5 Red Hat, Inc. All Rights Reserved.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 * 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>
Linus Torvalds1da177e2005-04-16 15:20:36 -070015#include <linux/completion.h>
Alexey Dobriyane8edc6e2007-05-21 01:22:52 +040016#include <linux/sched.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070017#include "internal.h"
18
Linus Torvalds1da177e2005-04-16 15:20:36 -070019MODULE_DESCRIPTION("AFS Client File System");
20MODULE_AUTHOR("Red Hat, Inc.");
21MODULE_LICENSE("GPL");
22
David Howells08e0e7c2007-04-26 15:55:03 -070023unsigned afs_debug;
24module_param_named(debug, afs_debug, uint, S_IWUSR | S_IRUGO);
Paul Bolle424b00e2008-04-16 11:08:22 +010025MODULE_PARM_DESC(debug, "AFS debugging mask");
David Howells08e0e7c2007-04-26 15:55:03 -070026
Linus Torvalds1da177e2005-04-16 15:20:36 -070027static char *rootcell;
28
29module_param(rootcell, charp, 0);
30MODULE_PARM_DESC(rootcell, "root AFS cell name and VL server IP addr list");
31
David Howellsb908fe62007-04-26 15:58:17 -070032struct afs_uuid afs_uuid;
Tejun Heo0ad53ee2011-01-14 15:56:37 +000033struct workqueue_struct *afs_wq;
David Howellsb908fe62007-04-26 15:58:17 -070034
35/*
36 * get a client UUID
37 */
38static 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 */
David Howellsec9c9482007-05-03 03:29:41 -070047 ret = afs_get_MAC_address(afs_uuid.node, sizeof(afs_uuid.node));
David Howellsb908fe62007-04-26 15:58:17 -070048 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;
David Howells0ef13512014-07-29 17:53:23 +010058 afs_uuid.time_hi_and_version |= AFS_UUID_VERSION_TIME;
David Howellsb908fe62007-04-26 15:58:17 -070059
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;
David Howells0ef13512014-07-29 17:53:23 +010064 afs_uuid.clock_seq_hi_and_reserved |= AFS_UUID_VARIANT_STD;
David Howellsb908fe62007-04-26 15:58:17 -070065
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
Linus Torvalds1da177e2005-04-16 15:20:36 -070078/*
79 * initialise the AFS client FS module
80 */
81static int __init afs_init(void)
82{
David Howells08e0e7c2007-04-26 15:55:03 -070083 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -070084
85 printk(KERN_INFO "kAFS: Red Hat AFS client v0.1 registering.\n");
86
David Howellsb908fe62007-04-26 15:58:17 -070087 ret = afs_get_client_UUID();
88 if (ret < 0)
89 return ret;
90
Tejun Heo0ad53ee2011-01-14 15:56:37 +000091 /* create workqueue */
92 ret = -ENOMEM;
93 afs_wq = alloc_workqueue("afs", 0, 0);
94 if (!afs_wq)
95 return ret;
96
Linus Torvalds1da177e2005-04-16 15:20:36 -070097 /* register the /proc stuff */
98 ret = afs_proc_init();
99 if (ret < 0)
Tejun Heo0ad53ee2011-01-14 15:56:37 +0000100 goto error_proc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101
David Howells9b3f26c2009-04-03 16:42:41 +0100102#ifdef CONFIG_AFS_FSCACHE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103 /* we want to be able to cache */
David Howells9b3f26c2009-04-03 16:42:41 +0100104 ret = fscache_register_netfs(&afs_cache_netfs);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105 if (ret < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106 goto error_cache;
107#endif
108
109 /* initialise the cell DB */
110 ret = afs_cell_init(rootcell);
111 if (ret < 0)
David Howellsec268152007-04-26 15:49:28 -0700112 goto error_cell_init;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113
David Howells08e0e7c2007-04-26 15:55:03 -0700114 /* initialise the VL update process */
115 ret = afs_vlocation_update_init();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116 if (ret < 0)
David Howells08e0e7c2007-04-26 15:55:03 -0700117 goto error_vl_update_init;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118
David Howells08e0e7c2007-04-26 15:55:03 -0700119 /* initialise the callback update process */
120 ret = afs_callback_update_init();
David Howellsdf44f9f2010-08-06 17:26:48 +0100121 if (ret < 0)
122 goto error_callback_update_init;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123
124 /* create the RxRPC transport */
David Howells08e0e7c2007-04-26 15:55:03 -0700125 ret = afs_open_socket();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126 if (ret < 0)
David Howells08e0e7c2007-04-26 15:55:03 -0700127 goto error_open_socket;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128
129 /* register the filesystems */
130 ret = afs_fs_init();
131 if (ret < 0)
David Howellsec268152007-04-26 15:49:28 -0700132 goto error_fs;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133
134 return ret;
135
David Howellsec268152007-04-26 15:49:28 -0700136error_fs:
David Howells08e0e7c2007-04-26 15:55:03 -0700137 afs_close_socket();
138error_open_socket:
David Howellsdf44f9f2010-08-06 17:26:48 +0100139 afs_callback_update_kill();
140error_callback_update_init:
141 afs_vlocation_purge();
David Howells08e0e7c2007-04-26 15:55:03 -0700142error_vl_update_init:
David Howellsdf44f9f2010-08-06 17:26:48 +0100143 afs_cell_purge();
David Howellsec268152007-04-26 15:49:28 -0700144error_cell_init:
David Howells9b3f26c2009-04-03 16:42:41 +0100145#ifdef CONFIG_AFS_FSCACHE
146 fscache_unregister_netfs(&afs_cache_netfs);
David Howellsec268152007-04-26 15:49:28 -0700147error_cache:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149 afs_proc_cleanup();
Tejun Heo0ad53ee2011-01-14 15:56:37 +0000150error_proc:
151 destroy_workqueue(afs_wq);
David Howells416351f2007-05-09 02:33:45 -0700152 rcu_barrier();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153 printk(KERN_ERR "kAFS: failed to register: %d\n", ret);
154 return ret;
David Howellsec268152007-04-26 15:49:28 -0700155}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156
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 */
160late_initcall(afs_init); /* must be called after net/ to create socket */
David Howellsec268152007-04-26 15:49:28 -0700161
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162/*
163 * clean up on module removal
164 */
165static void __exit afs_exit(void)
166{
167 printk(KERN_INFO "kAFS: Red Hat AFS client v0.1 unregistering.\n");
168
169 afs_fs_exit();
David Howellse8d6c552007-07-15 23:40:12 -0700170 afs_kill_lock_manager();
David Howells08e0e7c2007-04-26 15:55:03 -0700171 afs_close_socket();
172 afs_purge_servers();
173 afs_callback_update_kill();
174 afs_vlocation_purge();
Tejun Heo0ad53ee2011-01-14 15:56:37 +0000175 destroy_workqueue(afs_wq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176 afs_cell_purge();
David Howells9b3f26c2009-04-03 16:42:41 +0100177#ifdef CONFIG_AFS_FSCACHE
178 fscache_unregister_netfs(&afs_cache_netfs);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179#endif
180 afs_proc_cleanup();
David Howells416351f2007-05-09 02:33:45 -0700181 rcu_barrier();
David Howellsec268152007-04-26 15:49:28 -0700182}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183
184module_exit(afs_exit);