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 <linux/random.h>
18 #define CREATE_TRACE_POINTS
21 MODULE_DESCRIPTION("AFS Client File System");
22 MODULE_AUTHOR("Red Hat, Inc.");
23 MODULE_LICENSE("GPL");
26 module_param_named(debug, afs_debug, uint, S_IWUSR | S_IRUGO);
27 MODULE_PARM_DESC(debug, "AFS debugging mask");
29 static char *rootcell;
31 module_param(rootcell, charp, 0);
32 MODULE_PARM_DESC(rootcell, "root AFS cell name and VL server IP addr list");
34 struct workqueue_struct *afs_wq;
35 struct afs_net __afs_net;
37 #if defined(CONFIG_ALPHA)
38 const char afs_init_sysname[] = "alpha_linux26";
39 #elif defined(CONFIG_X86_64)
40 const char afs_init_sysname[] = "amd64_linux26";
41 #elif defined(CONFIG_ARM)
42 const char afs_init_sysname[] = "arm_linux26";
43 #elif defined(CONFIG_ARM64)
44 const char afs_init_sysname[] = "aarch64_linux26";
45 #elif defined(CONFIG_X86_32)
46 const char afs_init_sysname[] = "i386_linux26";
47 #elif defined(CONFIG_IA64)
48 const char afs_init_sysname[] = "ia64_linux26";
49 #elif defined(CONFIG_PPC64)
50 const char afs_init_sysname[] = "ppc64_linux26";
51 #elif defined(CONFIG_PPC32)
52 const char afs_init_sysname[] = "ppc_linux26";
53 #elif defined(CONFIG_S390)
55 const char afs_init_sysname[] = "s390x_linux26";
57 const char afs_init_sysname[] = "s390_linux26";
59 #elif defined(CONFIG_SPARC64)
60 const char afs_init_sysname[] = "sparc64_linux26";
61 #elif defined(CONFIG_SPARC32)
62 const char afs_init_sysname[] = "sparc_linux26";
64 const char afs_init_sysname[] = "unknown_linux26";
68 * Initialise an AFS network namespace record.
70 static int __net_init afs_net_init(struct afs_net *net)
72 struct afs_sysnames *sysnames;
76 generate_random_uuid((unsigned char *)&net->uuid);
78 INIT_WORK(&net->charge_preallocation_work, afs_charge_preallocation);
79 mutex_init(&net->socket_mutex);
82 seqlock_init(&net->cells_lock);
83 INIT_WORK(&net->cells_manager, afs_manage_cells);
84 timer_setup(&net->cells_timer, afs_cells_timer, 0);
86 spin_lock_init(&net->proc_cells_lock);
87 INIT_LIST_HEAD(&net->proc_cells);
89 seqlock_init(&net->fs_lock);
90 net->fs_servers = RB_ROOT;
91 INIT_LIST_HEAD(&net->fs_updates);
92 INIT_HLIST_HEAD(&net->fs_proc);
94 INIT_HLIST_HEAD(&net->fs_addresses4);
95 INIT_HLIST_HEAD(&net->fs_addresses6);
96 seqlock_init(&net->fs_addr_lock);
98 INIT_WORK(&net->fs_manager, afs_manage_servers);
99 timer_setup(&net->fs_timer, afs_servers_timer, 0);
102 sysnames = kzalloc(sizeof(*sysnames), GFP_KERNEL);
105 sysnames->subs[0] = (char *)&afs_init_sysname;
107 refcount_set(&sysnames->usage, 1);
108 net->sysnames = sysnames;
109 rwlock_init(&net->sysnames_lock);
111 /* Register the /proc stuff */
112 ret = afs_proc_init(net);
116 /* Initialise the cell DB */
117 ret = afs_cell_init(net, rootcell);
119 goto error_cell_init;
121 /* Create the RxRPC transport */
122 ret = afs_open_socket(net);
124 goto error_open_socket;
131 afs_purge_servers(net);
134 afs_proc_cleanup(net);
136 afs_put_sysnames(net->sysnames);
143 * Clean up and destroy an AFS network namespace record.
145 static void __net_exit afs_net_exit(struct afs_net *net)
149 afs_purge_servers(net);
150 afs_close_socket(net);
151 afs_proc_cleanup(net);
152 afs_put_sysnames(net->sysnames);
156 * initialise the AFS client FS module
158 static int __init afs_init(void)
162 printk(KERN_INFO "kAFS: Red Hat AFS client v0.1 registering.\n");
164 afs_wq = alloc_workqueue("afs", 0, 0);
167 afs_async_calls = alloc_workqueue("kafsd", WQ_MEM_RECLAIM, 0);
168 if (!afs_async_calls)
170 afs_lock_manager = alloc_workqueue("kafs_lockd", WQ_MEM_RECLAIM, 0);
171 if (!afs_lock_manager)
174 #ifdef CONFIG_AFS_FSCACHE
175 /* we want to be able to cache */
176 ret = fscache_register_netfs(&afs_cache_netfs);
181 ret = afs_net_init(&__afs_net);
185 /* register the filesystems */
193 afs_net_exit(&__afs_net);
195 #ifdef CONFIG_AFS_FSCACHE
196 fscache_unregister_netfs(&afs_cache_netfs);
199 destroy_workqueue(afs_lock_manager);
201 destroy_workqueue(afs_async_calls);
203 destroy_workqueue(afs_wq);
206 printk(KERN_ERR "kAFS: failed to register: %d\n", ret);
210 /* XXX late_initcall is kludgy, but the only alternative seems to create
211 * a transport upon the first mount, which is worse. Or is it?
213 late_initcall(afs_init); /* must be called after net/ to create socket */
216 * clean up on module removal
218 static void __exit afs_exit(void)
220 printk(KERN_INFO "kAFS: Red Hat AFS client v0.1 unregistering.\n");
223 afs_net_exit(&__afs_net);
224 #ifdef CONFIG_AFS_FSCACHE
225 fscache_unregister_netfs(&afs_cache_netfs);
227 destroy_workqueue(afs_lock_manager);
228 destroy_workqueue(afs_async_calls);
229 destroy_workqueue(afs_wq);
230 afs_clean_up_permit_cache();
234 module_exit(afs_exit);