tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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 <linux/random.h>
18#define CREATE_TRACE_POINTS
19#include "internal.h"
20
21MODULE_DESCRIPTION("AFS Client File System");
22MODULE_AUTHOR("Red Hat, Inc.");
23MODULE_LICENSE("GPL");
24
25unsigned afs_debug;
26module_param_named(debug, afs_debug, uint, S_IWUSR | S_IRUGO);
27MODULE_PARM_DESC(debug, "AFS debugging mask");
28
29static char *rootcell;
30
31module_param(rootcell, charp, 0);
32MODULE_PARM_DESC(rootcell, "root AFS cell name and VL server IP addr list");
33
34struct uuid_v1 afs_uuid;
35struct workqueue_struct *afs_wq;
36
37/*
38 * initialise the AFS client FS module
39 */
40static int __init afs_init(void)
41{
42 int ret;
43
44 printk(KERN_INFO "kAFS: Red Hat AFS client v0.1 registering.\n");
45
46 generate_random_uuid((unsigned char *)&afs_uuid);
47
48 /* create workqueue */
49 ret = -ENOMEM;
50 afs_wq = alloc_workqueue("afs", 0, 0);
51 if (!afs_wq)
52 return ret;
53
54 /* register the /proc stuff */
55 ret = afs_proc_init();
56 if (ret < 0)
57 goto error_proc;
58
59#ifdef CONFIG_AFS_FSCACHE
60 /* we want to be able to cache */
61 ret = fscache_register_netfs(&afs_cache_netfs);
62 if (ret < 0)
63 goto error_cache;
64#endif
65
66 /* initialise the cell DB */
67 ret = afs_cell_init(rootcell);
68 if (ret < 0)
69 goto error_cell_init;
70
71 /* initialise the VL update process */
72 ret = afs_vlocation_update_init();
73 if (ret < 0)
74 goto error_vl_update_init;
75
76 /* initialise the callback update process */
77 ret = afs_callback_update_init();
78 if (ret < 0)
79 goto error_callback_update_init;
80
81 /* create the RxRPC transport */
82 ret = afs_open_socket();
83 if (ret < 0)
84 goto error_open_socket;
85
86 /* register the filesystems */
87 ret = afs_fs_init();
88 if (ret < 0)
89 goto error_fs;
90
91 return ret;
92
93error_fs:
94 afs_close_socket();
95error_open_socket:
96 afs_callback_update_kill();
97error_callback_update_init:
98 afs_vlocation_purge();
99error_vl_update_init:
100 afs_cell_purge();
101error_cell_init:
102#ifdef CONFIG_AFS_FSCACHE
103 fscache_unregister_netfs(&afs_cache_netfs);
104error_cache:
105#endif
106 afs_proc_cleanup();
107error_proc:
108 destroy_workqueue(afs_wq);
109 rcu_barrier();
110 printk(KERN_ERR "kAFS: failed to register: %d\n", ret);
111 return ret;
112}
113
114/* XXX late_initcall is kludgy, but the only alternative seems to create
115 * a transport upon the first mount, which is worse. Or is it?
116 */
117late_initcall(afs_init); /* must be called after net/ to create socket */
118
119/*
120 * clean up on module removal
121 */
122static void __exit afs_exit(void)
123{
124 printk(KERN_INFO "kAFS: Red Hat AFS client v0.1 unregistering.\n");
125
126 afs_fs_exit();
127 afs_kill_lock_manager();
128 afs_close_socket();
129 afs_purge_servers();
130 afs_callback_update_kill();
131 afs_vlocation_purge();
132 destroy_workqueue(afs_wq);
133 afs_cell_purge();
134#ifdef CONFIG_AFS_FSCACHE
135 fscache_unregister_netfs(&afs_cache_netfs);
136#endif
137 afs_proc_cleanup();
138 rcu_barrier();
139}
140
141module_exit(afs_exit);