1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /* AFS client file system
4 * Copyright (C) 2002,5 Red Hat, Inc. All Rights Reserved.
5 * Written by David Howells (dhowells@redhat.com)
8 #include <linux/module.h>
9 #include <linux/moduleparam.h>
10 #include <linux/init.h>
11 #include <linux/completion.h>
12 #include <linux/sched.h>
13 #include <linux/random.h>
14 #include <linux/proc_fs.h>
15 #define CREATE_TRACE_POINTS
18 MODULE_DESCRIPTION("AFS Client File System");
19 MODULE_AUTHOR("Red Hat, Inc.");
20 MODULE_LICENSE("GPL");
23 module_param_named(debug, afs_debug, uint, S_IWUSR | S_IRUGO);
24 MODULE_PARM_DESC(debug, "AFS debugging mask");
26 static char *rootcell;
28 module_param(rootcell, charp, 0);
29 MODULE_PARM_DESC(rootcell, "root AFS cell name and VL server IP addr list");
31 struct workqueue_struct *afs_wq;
32 static struct proc_dir_entry *afs_proc_symlink;
34 #if defined(CONFIG_ALPHA)
35 const char afs_init_sysname[] = "alpha_linux26";
36 #elif defined(CONFIG_X86_64)
37 const char afs_init_sysname[] = "amd64_linux26";
38 #elif defined(CONFIG_ARM)
39 const char afs_init_sysname[] = "arm_linux26";
40 #elif defined(CONFIG_ARM64)
41 const char afs_init_sysname[] = "aarch64_linux26";
42 #elif defined(CONFIG_X86_32)
43 const char afs_init_sysname[] = "i386_linux26";
44 #elif defined(CONFIG_IA64)
45 const char afs_init_sysname[] = "ia64_linux26";
46 #elif defined(CONFIG_PPC64)
47 const char afs_init_sysname[] = "ppc64_linux26";
48 #elif defined(CONFIG_PPC32)
49 const char afs_init_sysname[] = "ppc_linux26";
50 #elif defined(CONFIG_S390)
52 const char afs_init_sysname[] = "s390x_linux26";
54 const char afs_init_sysname[] = "s390_linux26";
56 #elif defined(CONFIG_SPARC64)
57 const char afs_init_sysname[] = "sparc64_linux26";
58 #elif defined(CONFIG_SPARC32)
59 const char afs_init_sysname[] = "sparc_linux26";
61 const char afs_init_sysname[] = "unknown_linux26";
65 * Initialise an AFS network namespace record.
67 static int __net_init afs_net_init(struct net *net_ns)
69 struct afs_sysnames *sysnames;
70 struct afs_net *net = afs_net(net_ns);
75 generate_random_uuid((unsigned char *)&net->uuid);
77 INIT_WORK(&net->charge_preallocation_work, afs_charge_preallocation);
78 mutex_init(&net->socket_mutex);
81 init_rwsem(&net->cells_lock);
82 INIT_WORK(&net->cells_manager, afs_manage_cells);
83 timer_setup(&net->cells_timer, afs_cells_timer, 0);
85 mutex_init(&net->cells_alias_lock);
86 mutex_init(&net->proc_cells_lock);
87 INIT_HLIST_HEAD(&net->proc_cells);
89 seqlock_init(&net->fs_lock);
90 net->fs_servers = RB_ROOT;
91 INIT_LIST_HEAD(&net->fs_probe_fast);
92 INIT_LIST_HEAD(&net->fs_probe_slow);
93 INIT_HLIST_HEAD(&net->fs_proc);
95 INIT_HLIST_HEAD(&net->fs_addresses4);
96 INIT_HLIST_HEAD(&net->fs_addresses6);
97 seqlock_init(&net->fs_addr_lock);
99 INIT_WORK(&net->fs_manager, afs_manage_servers);
100 timer_setup(&net->fs_timer, afs_servers_timer, 0);
101 INIT_WORK(&net->fs_prober, afs_fs_probe_dispatcher);
102 timer_setup(&net->fs_probe_timer, afs_fs_probe_timer, 0);
103 atomic_set(&net->servers_outstanding, 1);
106 sysnames = kzalloc(sizeof(*sysnames), GFP_KERNEL);
109 sysnames->subs[0] = (char *)&afs_init_sysname;
111 refcount_set(&sysnames->usage, 1);
112 net->sysnames = sysnames;
113 rwlock_init(&net->sysnames_lock);
115 /* Register the /proc stuff */
116 ret = afs_proc_init(net);
120 /* Initialise the cell DB */
121 ret = afs_cell_init(net, rootcell);
123 goto error_cell_init;
125 /* Create the RxRPC transport */
126 ret = afs_open_socket(net);
128 goto error_open_socket;
134 afs_fs_probe_cleanup(net);
136 afs_purge_servers(net);
139 afs_proc_cleanup(net);
141 afs_put_sysnames(net->sysnames);
148 * Clean up and destroy an AFS network namespace record.
150 static void __net_exit afs_net_exit(struct net *net_ns)
152 struct afs_net *net = afs_net(net_ns);
155 afs_fs_probe_cleanup(net);
157 afs_purge_servers(net);
158 afs_close_socket(net);
159 afs_proc_cleanup(net);
160 afs_put_sysnames(net->sysnames);
163 static struct pernet_operations afs_net_ops = {
164 .init = afs_net_init,
165 .exit = afs_net_exit,
167 .size = sizeof(struct afs_net),
171 * initialise the AFS client FS module
173 static int __init afs_init(void)
177 printk(KERN_INFO "kAFS: Red Hat AFS client v0.1 registering.\n");
179 afs_wq = alloc_workqueue("afs", 0, 0);
182 afs_async_calls = alloc_workqueue("kafsd", WQ_MEM_RECLAIM, 0);
183 if (!afs_async_calls)
185 afs_lock_manager = alloc_workqueue("kafs_lockd", WQ_MEM_RECLAIM, 0);
186 if (!afs_lock_manager)
189 #ifdef CONFIG_AFS_FSCACHE
190 /* we want to be able to cache */
191 ret = fscache_register_netfs(&afs_cache_netfs);
196 ret = register_pernet_device(&afs_net_ops);
200 /* register the filesystems */
205 afs_proc_symlink = proc_symlink("fs/afs", NULL, "../self/net/afs");
206 if (!afs_proc_symlink) {
216 unregister_pernet_device(&afs_net_ops);
218 #ifdef CONFIG_AFS_FSCACHE
219 fscache_unregister_netfs(&afs_cache_netfs);
222 destroy_workqueue(afs_lock_manager);
224 destroy_workqueue(afs_async_calls);
226 destroy_workqueue(afs_wq);
229 printk(KERN_ERR "kAFS: failed to register: %d\n", ret);
233 /* XXX late_initcall is kludgy, but the only alternative seems to create
234 * a transport upon the first mount, which is worse. Or is it?
236 late_initcall(afs_init); /* must be called after net/ to create socket */
239 * clean up on module removal
241 static void __exit afs_exit(void)
243 printk(KERN_INFO "kAFS: Red Hat AFS client v0.1 unregistering.\n");
245 proc_remove(afs_proc_symlink);
247 unregister_pernet_device(&afs_net_ops);
248 #ifdef CONFIG_AFS_FSCACHE
249 fscache_unregister_netfs(&afs_cache_netfs);
251 destroy_workqueue(afs_lock_manager);
252 destroy_workqueue(afs_async_calls);
253 destroy_workqueue(afs_wq);
254 afs_clean_up_permit_cache();
258 module_exit(afs_exit);