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1// SPDX-License-Identifier: GPL-2.0-or-later
2/* AFS client file system
3 *
4 * Copyright (C) 2002,5 Red Hat, Inc. All Rights Reserved.
5 * Written by David Howells (dhowells@redhat.com)
6 */
7
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
16#include "internal.h"
17
18MODULE_DESCRIPTION("AFS Client File System");
19MODULE_AUTHOR("Red Hat, Inc.");
20MODULE_LICENSE("GPL");
21
22unsigned afs_debug;
23module_param_named(debug, afs_debug, uint, S_IWUSR | S_IRUGO);
24MODULE_PARM_DESC(debug, "AFS debugging mask");
25
26static char *rootcell;
27
28module_param(rootcell, charp, 0);
29MODULE_PARM_DESC(rootcell, "root AFS cell name and VL server IP addr list");
30
31struct workqueue_struct *afs_wq;
32static struct proc_dir_entry *afs_proc_symlink;
33
34#if defined(CONFIG_ALPHA)
35const char afs_init_sysname[] = "alpha_linux26";
36#elif defined(CONFIG_X86_64)
37const char afs_init_sysname[] = "amd64_linux26";
38#elif defined(CONFIG_ARM)
39const char afs_init_sysname[] = "arm_linux26";
40#elif defined(CONFIG_ARM64)
41const char afs_init_sysname[] = "aarch64_linux26";
42#elif defined(CONFIG_X86_32)
43const char afs_init_sysname[] = "i386_linux26";
44#elif defined(CONFIG_IA64)
45const char afs_init_sysname[] = "ia64_linux26";
46#elif defined(CONFIG_PPC64)
47const char afs_init_sysname[] = "ppc64_linux26";
48#elif defined(CONFIG_PPC32)
49const char afs_init_sysname[] = "ppc_linux26";
50#elif defined(CONFIG_S390)
51#ifdef CONFIG_64BIT
52const char afs_init_sysname[] = "s390x_linux26";
53#else
54const char afs_init_sysname[] = "s390_linux26";
55#endif
56#elif defined(CONFIG_SPARC64)
57const char afs_init_sysname[] = "sparc64_linux26";
58#elif defined(CONFIG_SPARC32)
59const char afs_init_sysname[] = "sparc_linux26";
60#else
61const char afs_init_sysname[] = "unknown_linux26";
62#endif
63
64/*
65 * Initialise an AFS network namespace record.
66 */
67static int __net_init afs_net_init(struct net *net_ns)
68{
69 struct afs_sysnames *sysnames;
70 struct afs_net *net = afs_net(net_ns);
71 int ret;
72
73 net->net = net_ns;
74 net->live = true;
75 generate_random_uuid((unsigned char *)&net->uuid);
76
77 INIT_WORK(&net->charge_preallocation_work, afs_charge_preallocation);
78 mutex_init(&net->socket_mutex);
79
80 net->cells = RB_ROOT;
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);
84
85 mutex_init(&net->cells_alias_lock);
86 mutex_init(&net->proc_cells_lock);
87 INIT_HLIST_HEAD(&net->proc_cells);
88
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);
94
95 INIT_HLIST_HEAD(&net->fs_addresses4);
96 INIT_HLIST_HEAD(&net->fs_addresses6);
97 seqlock_init(&net->fs_addr_lock);
98
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);
104
105 ret = -ENOMEM;
106 sysnames = kzalloc(sizeof(*sysnames), GFP_KERNEL);
107 if (!sysnames)
108 goto error_sysnames;
109 sysnames->subs[0] = (char *)&afs_init_sysname;
110 sysnames->nr = 1;
111 refcount_set(&sysnames->usage, 1);
112 net->sysnames = sysnames;
113 rwlock_init(&net->sysnames_lock);
114
115 /* Register the /proc stuff */
116 ret = afs_proc_init(net);
117 if (ret < 0)
118 goto error_proc;
119
120 /* Initialise the cell DB */
121 ret = afs_cell_init(net, rootcell);
122 if (ret < 0)
123 goto error_cell_init;
124
125 /* Create the RxRPC transport */
126 ret = afs_open_socket(net);
127 if (ret < 0)
128 goto error_open_socket;
129
130 return 0;
131
132error_open_socket:
133 net->live = false;
134 afs_fs_probe_cleanup(net);
135 afs_cell_purge(net);
136 afs_purge_servers(net);
137error_cell_init:
138 net->live = false;
139 afs_proc_cleanup(net);
140error_proc:
141 afs_put_sysnames(net->sysnames);
142error_sysnames:
143 net->live = false;
144 return ret;
145}
146
147/*
148 * Clean up and destroy an AFS network namespace record.
149 */
150static void __net_exit afs_net_exit(struct net *net_ns)
151{
152 struct afs_net *net = afs_net(net_ns);
153
154 net->live = false;
155 afs_fs_probe_cleanup(net);
156 afs_cell_purge(net);
157 afs_purge_servers(net);
158 afs_close_socket(net);
159 afs_proc_cleanup(net);
160 afs_put_sysnames(net->sysnames);
161}
162
163static struct pernet_operations afs_net_ops = {
164 .init = afs_net_init,
165 .exit = afs_net_exit,
166 .id = &afs_net_id,
167 .size = sizeof(struct afs_net),
168};
169
170/*
171 * initialise the AFS client FS module
172 */
173static int __init afs_init(void)
174{
175 int ret = -ENOMEM;
176
177 printk(KERN_INFO "kAFS: Red Hat AFS client v0.1 registering.\n");
178
179 afs_wq = alloc_workqueue("afs", 0, 0);
180 if (!afs_wq)
181 goto error_afs_wq;
182 afs_async_calls = alloc_workqueue("kafsd", WQ_MEM_RECLAIM, 0);
183 if (!afs_async_calls)
184 goto error_async;
185 afs_lock_manager = alloc_workqueue("kafs_lockd", WQ_MEM_RECLAIM, 0);
186 if (!afs_lock_manager)
187 goto error_lockmgr;
188
189#ifdef CONFIG_AFS_FSCACHE
190 /* we want to be able to cache */
191 ret = fscache_register_netfs(&afs_cache_netfs);
192 if (ret < 0)
193 goto error_cache;
194#endif
195
196 ret = register_pernet_device(&afs_net_ops);
197 if (ret < 0)
198 goto error_net;
199
200 /* register the filesystems */
201 ret = afs_fs_init();
202 if (ret < 0)
203 goto error_fs;
204
205 afs_proc_symlink = proc_symlink("fs/afs", NULL, "../self/net/afs");
206 if (!afs_proc_symlink) {
207 ret = -ENOMEM;
208 goto error_proc;
209 }
210
211 return ret;
212
213error_proc:
214 afs_fs_exit();
215error_fs:
216 unregister_pernet_device(&afs_net_ops);
217error_net:
218#ifdef CONFIG_AFS_FSCACHE
219 fscache_unregister_netfs(&afs_cache_netfs);
220error_cache:
221#endif
222 destroy_workqueue(afs_lock_manager);
223error_lockmgr:
224 destroy_workqueue(afs_async_calls);
225error_async:
226 destroy_workqueue(afs_wq);
227error_afs_wq:
228 rcu_barrier();
229 printk(KERN_ERR "kAFS: failed to register: %d\n", ret);
230 return ret;
231}
232
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?
235 */
236late_initcall(afs_init); /* must be called after net/ to create socket */
237
238/*
239 * clean up on module removal
240 */
241static void __exit afs_exit(void)
242{
243 printk(KERN_INFO "kAFS: Red Hat AFS client v0.1 unregistering.\n");
244
245 proc_remove(afs_proc_symlink);
246 afs_fs_exit();
247 unregister_pernet_device(&afs_net_ops);
248#ifdef CONFIG_AFS_FSCACHE
249 fscache_unregister_netfs(&afs_cache_netfs);
250#endif
251 destroy_workqueue(afs_lock_manager);
252 destroy_workqueue(afs_async_calls);
253 destroy_workqueue(afs_wq);
254 afs_clean_up_permit_cache();
255 rcu_barrier();
256}
257
258module_exit(afs_exit);
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 workqueue_struct *afs_wq;
35struct afs_net __afs_net;
36
37#if defined(CONFIG_ALPHA)
38const char afs_init_sysname[] = "alpha_linux26";
39#elif defined(CONFIG_X86_64)
40const char afs_init_sysname[] = "amd64_linux26";
41#elif defined(CONFIG_ARM)
42const char afs_init_sysname[] = "arm_linux26";
43#elif defined(CONFIG_ARM64)
44const char afs_init_sysname[] = "aarch64_linux26";
45#elif defined(CONFIG_X86_32)
46const char afs_init_sysname[] = "i386_linux26";
47#elif defined(CONFIG_IA64)
48const char afs_init_sysname[] = "ia64_linux26";
49#elif defined(CONFIG_PPC64)
50const char afs_init_sysname[] = "ppc64_linux26";
51#elif defined(CONFIG_PPC32)
52const char afs_init_sysname[] = "ppc_linux26";
53#elif defined(CONFIG_S390)
54#ifdef CONFIG_64BIT
55const char afs_init_sysname[] = "s390x_linux26";
56#else
57const char afs_init_sysname[] = "s390_linux26";
58#endif
59#elif defined(CONFIG_SPARC64)
60const char afs_init_sysname[] = "sparc64_linux26";
61#elif defined(CONFIG_SPARC32)
62const char afs_init_sysname[] = "sparc_linux26";
63#else
64const char afs_init_sysname[] = "unknown_linux26";
65#endif
66
67/*
68 * Initialise an AFS network namespace record.
69 */
70static int __net_init afs_net_init(struct afs_net *net)
71{
72 struct afs_sysnames *sysnames;
73 int ret;
74
75 net->live = true;
76 generate_random_uuid((unsigned char *)&net->uuid);
77
78 INIT_WORK(&net->charge_preallocation_work, afs_charge_preallocation);
79 mutex_init(&net->socket_mutex);
80
81 net->cells = RB_ROOT;
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);
85
86 spin_lock_init(&net->proc_cells_lock);
87 INIT_LIST_HEAD(&net->proc_cells);
88
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);
93
94 INIT_HLIST_HEAD(&net->fs_addresses4);
95 INIT_HLIST_HEAD(&net->fs_addresses6);
96 seqlock_init(&net->fs_addr_lock);
97
98 INIT_WORK(&net->fs_manager, afs_manage_servers);
99 timer_setup(&net->fs_timer, afs_servers_timer, 0);
100
101 ret = -ENOMEM;
102 sysnames = kzalloc(sizeof(*sysnames), GFP_KERNEL);
103 if (!sysnames)
104 goto error_sysnames;
105 sysnames->subs[0] = (char *)&afs_init_sysname;
106 sysnames->nr = 1;
107 refcount_set(&sysnames->usage, 1);
108 net->sysnames = sysnames;
109 rwlock_init(&net->sysnames_lock);
110
111 /* Register the /proc stuff */
112 ret = afs_proc_init(net);
113 if (ret < 0)
114 goto error_proc;
115
116 /* Initialise the cell DB */
117 ret = afs_cell_init(net, rootcell);
118 if (ret < 0)
119 goto error_cell_init;
120
121 /* Create the RxRPC transport */
122 ret = afs_open_socket(net);
123 if (ret < 0)
124 goto error_open_socket;
125
126 return 0;
127
128error_open_socket:
129 net->live = false;
130 afs_cell_purge(net);
131 afs_purge_servers(net);
132error_cell_init:
133 net->live = false;
134 afs_proc_cleanup(net);
135error_proc:
136 afs_put_sysnames(net->sysnames);
137error_sysnames:
138 net->live = false;
139 return ret;
140}
141
142/*
143 * Clean up and destroy an AFS network namespace record.
144 */
145static void __net_exit afs_net_exit(struct afs_net *net)
146{
147 net->live = false;
148 afs_cell_purge(net);
149 afs_purge_servers(net);
150 afs_close_socket(net);
151 afs_proc_cleanup(net);
152 afs_put_sysnames(net->sysnames);
153}
154
155/*
156 * initialise the AFS client FS module
157 */
158static int __init afs_init(void)
159{
160 int ret = -ENOMEM;
161
162 printk(KERN_INFO "kAFS: Red Hat AFS client v0.1 registering.\n");
163
164 afs_wq = alloc_workqueue("afs", 0, 0);
165 if (!afs_wq)
166 goto error_afs_wq;
167 afs_async_calls = alloc_workqueue("kafsd", WQ_MEM_RECLAIM, 0);
168 if (!afs_async_calls)
169 goto error_async;
170 afs_lock_manager = alloc_workqueue("kafs_lockd", WQ_MEM_RECLAIM, 0);
171 if (!afs_lock_manager)
172 goto error_lockmgr;
173
174#ifdef CONFIG_AFS_FSCACHE
175 /* we want to be able to cache */
176 ret = fscache_register_netfs(&afs_cache_netfs);
177 if (ret < 0)
178 goto error_cache;
179#endif
180
181 ret = afs_net_init(&__afs_net);
182 if (ret < 0)
183 goto error_net;
184
185 /* register the filesystems */
186 ret = afs_fs_init();
187 if (ret < 0)
188 goto error_fs;
189
190 return ret;
191
192error_fs:
193 afs_net_exit(&__afs_net);
194error_net:
195#ifdef CONFIG_AFS_FSCACHE
196 fscache_unregister_netfs(&afs_cache_netfs);
197error_cache:
198#endif
199 destroy_workqueue(afs_lock_manager);
200error_lockmgr:
201 destroy_workqueue(afs_async_calls);
202error_async:
203 destroy_workqueue(afs_wq);
204error_afs_wq:
205 rcu_barrier();
206 printk(KERN_ERR "kAFS: failed to register: %d\n", ret);
207 return ret;
208}
209
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?
212 */
213late_initcall(afs_init); /* must be called after net/ to create socket */
214
215/*
216 * clean up on module removal
217 */
218static void __exit afs_exit(void)
219{
220 printk(KERN_INFO "kAFS: Red Hat AFS client v0.1 unregistering.\n");
221
222 afs_fs_exit();
223 afs_net_exit(&__afs_net);
224#ifdef CONFIG_AFS_FSCACHE
225 fscache_unregister_netfs(&afs_cache_netfs);
226#endif
227 destroy_workqueue(afs_lock_manager);
228 destroy_workqueue(afs_async_calls);
229 destroy_workqueue(afs_wq);
230 afs_clean_up_permit_cache();
231 rcu_barrier();
232}
233
234module_exit(afs_exit);