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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_PPC64)
45const char afs_init_sysname[] = "ppc64_linux26";
46#elif defined(CONFIG_PPC32)
47const char afs_init_sysname[] = "ppc_linux26";
48#elif defined(CONFIG_S390)
49#ifdef CONFIG_64BIT
50const char afs_init_sysname[] = "s390x_linux26";
51#else
52const char afs_init_sysname[] = "s390_linux26";
53#endif
54#elif defined(CONFIG_SPARC64)
55const char afs_init_sysname[] = "sparc64_linux26";
56#elif defined(CONFIG_SPARC32)
57const char afs_init_sysname[] = "sparc_linux26";
58#else
59const char afs_init_sysname[] = "unknown_linux26";
60#endif
61
62/*
63 * Initialise an AFS network namespace record.
64 */
65static int __net_init afs_net_init(struct net *net_ns)
66{
67 struct afs_sysnames *sysnames;
68 struct afs_net *net = afs_net(net_ns);
69 int ret;
70
71 net->net = net_ns;
72 net->live = true;
73 generate_random_uuid((unsigned char *)&net->uuid);
74
75 INIT_WORK(&net->charge_preallocation_work, afs_charge_preallocation);
76 mutex_init(&net->socket_mutex);
77
78 net->cells = RB_ROOT;
79 init_rwsem(&net->cells_lock);
80 INIT_WORK(&net->cells_manager, afs_manage_cells);
81 timer_setup(&net->cells_timer, afs_cells_timer, 0);
82
83 mutex_init(&net->cells_alias_lock);
84 mutex_init(&net->proc_cells_lock);
85 INIT_HLIST_HEAD(&net->proc_cells);
86
87 seqlock_init(&net->fs_lock);
88 net->fs_servers = RB_ROOT;
89 INIT_LIST_HEAD(&net->fs_probe_fast);
90 INIT_LIST_HEAD(&net->fs_probe_slow);
91 INIT_HLIST_HEAD(&net->fs_proc);
92
93 INIT_HLIST_HEAD(&net->fs_addresses);
94 seqlock_init(&net->fs_addr_lock);
95
96 INIT_WORK(&net->fs_manager, afs_manage_servers);
97 timer_setup(&net->fs_timer, afs_servers_timer, 0);
98 INIT_WORK(&net->fs_prober, afs_fs_probe_dispatcher);
99 timer_setup(&net->fs_probe_timer, afs_fs_probe_timer, 0);
100 atomic_set(&net->servers_outstanding, 1);
101
102 ret = -ENOMEM;
103 sysnames = kzalloc(sizeof(*sysnames), GFP_KERNEL);
104 if (!sysnames)
105 goto error_sysnames;
106 sysnames->subs[0] = (char *)&afs_init_sysname;
107 sysnames->nr = 1;
108 refcount_set(&sysnames->usage, 1);
109 net->sysnames = sysnames;
110 rwlock_init(&net->sysnames_lock);
111
112 /* Register the /proc stuff */
113 ret = afs_proc_init(net);
114 if (ret < 0)
115 goto error_proc;
116
117 /* Initialise the cell DB */
118 ret = afs_cell_init(net, rootcell);
119 if (ret < 0)
120 goto error_cell_init;
121
122 /* Create the RxRPC transport */
123 ret = afs_open_socket(net);
124 if (ret < 0)
125 goto error_open_socket;
126
127 return 0;
128
129error_open_socket:
130 net->live = false;
131 afs_fs_probe_cleanup(net);
132 afs_cell_purge(net);
133 afs_purge_servers(net);
134error_cell_init:
135 net->live = false;
136 afs_proc_cleanup(net);
137error_proc:
138 afs_put_sysnames(net->sysnames);
139error_sysnames:
140 net->live = false;
141 return ret;
142}
143
144/*
145 * Clean up and destroy an AFS network namespace record.
146 */
147static void __net_exit afs_net_exit(struct net *net_ns)
148{
149 struct afs_net *net = afs_net(net_ns);
150
151 net->live = false;
152 afs_fs_probe_cleanup(net);
153 afs_cell_purge(net);
154 afs_purge_servers(net);
155 afs_close_socket(net);
156 afs_proc_cleanup(net);
157 afs_put_sysnames(net->sysnames);
158 kfree_rcu(rcu_access_pointer(net->address_prefs), rcu);
159}
160
161static struct pernet_operations afs_net_ops = {
162 .init = afs_net_init,
163 .exit = afs_net_exit,
164 .id = &afs_net_id,
165 .size = sizeof(struct afs_net),
166};
167
168/*
169 * initialise the AFS client FS module
170 */
171static int __init afs_init(void)
172{
173 int ret = -ENOMEM;
174
175 printk(KERN_INFO "kAFS: Red Hat AFS client v0.1 registering.\n");
176
177 afs_wq = alloc_workqueue("afs", 0, 0);
178 if (!afs_wq)
179 goto error_afs_wq;
180 afs_async_calls = alloc_workqueue("kafsd", WQ_MEM_RECLAIM, 0);
181 if (!afs_async_calls)
182 goto error_async;
183 afs_lock_manager = alloc_workqueue("kafs_lockd", WQ_MEM_RECLAIM, 0);
184 if (!afs_lock_manager)
185 goto error_lockmgr;
186
187 ret = register_pernet_device(&afs_net_ops);
188 if (ret < 0)
189 goto error_net;
190
191 /* register the filesystems */
192 ret = afs_fs_init();
193 if (ret < 0)
194 goto error_fs;
195
196 afs_proc_symlink = proc_symlink("fs/afs", NULL, "../self/net/afs");
197 if (!afs_proc_symlink) {
198 ret = -ENOMEM;
199 goto error_proc;
200 }
201
202 return ret;
203
204error_proc:
205 afs_fs_exit();
206error_fs:
207 unregister_pernet_device(&afs_net_ops);
208error_net:
209 destroy_workqueue(afs_lock_manager);
210error_lockmgr:
211 destroy_workqueue(afs_async_calls);
212error_async:
213 destroy_workqueue(afs_wq);
214error_afs_wq:
215 rcu_barrier();
216 printk(KERN_ERR "kAFS: failed to register: %d\n", ret);
217 return ret;
218}
219
220/* XXX late_initcall is kludgy, but the only alternative seems to create
221 * a transport upon the first mount, which is worse. Or is it?
222 */
223late_initcall(afs_init); /* must be called after net/ to create socket */
224
225/*
226 * clean up on module removal
227 */
228static void __exit afs_exit(void)
229{
230 printk(KERN_INFO "kAFS: Red Hat AFS client v0.1 unregistering.\n");
231
232 proc_remove(afs_proc_symlink);
233 afs_fs_exit();
234 unregister_pernet_device(&afs_net_ops);
235 destroy_workqueue(afs_lock_manager);
236 destroy_workqueue(afs_async_calls);
237 destroy_workqueue(afs_wq);
238 afs_clean_up_permit_cache();
239 rcu_barrier();
240}
241
242module_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 "internal.h"
18
19MODULE_DESCRIPTION("AFS Client File System");
20MODULE_AUTHOR("Red Hat, Inc.");
21MODULE_LICENSE("GPL");
22
23unsigned afs_debug;
24module_param_named(debug, afs_debug, uint, S_IWUSR | S_IRUGO);
25MODULE_PARM_DESC(debug, "AFS debugging mask");
26
27static char *rootcell;
28
29module_param(rootcell, charp, 0);
30MODULE_PARM_DESC(rootcell, "root AFS cell name and VL server IP addr list");
31
32struct afs_uuid afs_uuid;
33struct workqueue_struct *afs_wq;
34
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 */
47 ret = afs_get_MAC_address(afs_uuid.node, sizeof(afs_uuid.node));
48 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;
58 afs_uuid.time_hi_and_version = AFS_UUID_VERSION_TIME;
59
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;
64 afs_uuid.clock_seq_hi_and_reserved = AFS_UUID_VARIANT_STD;
65
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
78/*
79 * initialise the AFS client FS module
80 */
81static int __init afs_init(void)
82{
83 int ret;
84
85 printk(KERN_INFO "kAFS: Red Hat AFS client v0.1 registering.\n");
86
87 ret = afs_get_client_UUID();
88 if (ret < 0)
89 return ret;
90
91 /* create workqueue */
92 ret = -ENOMEM;
93 afs_wq = alloc_workqueue("afs", 0, 0);
94 if (!afs_wq)
95 return ret;
96
97 /* register the /proc stuff */
98 ret = afs_proc_init();
99 if (ret < 0)
100 goto error_proc;
101
102#ifdef CONFIG_AFS_FSCACHE
103 /* we want to be able to cache */
104 ret = fscache_register_netfs(&afs_cache_netfs);
105 if (ret < 0)
106 goto error_cache;
107#endif
108
109 /* initialise the cell DB */
110 ret = afs_cell_init(rootcell);
111 if (ret < 0)
112 goto error_cell_init;
113
114 /* initialise the VL update process */
115 ret = afs_vlocation_update_init();
116 if (ret < 0)
117 goto error_vl_update_init;
118
119 /* initialise the callback update process */
120 ret = afs_callback_update_init();
121 if (ret < 0)
122 goto error_callback_update_init;
123
124 /* create the RxRPC transport */
125 ret = afs_open_socket();
126 if (ret < 0)
127 goto error_open_socket;
128
129 /* register the filesystems */
130 ret = afs_fs_init();
131 if (ret < 0)
132 goto error_fs;
133
134 return ret;
135
136error_fs:
137 afs_close_socket();
138error_open_socket:
139 afs_callback_update_kill();
140error_callback_update_init:
141 afs_vlocation_purge();
142error_vl_update_init:
143 afs_cell_purge();
144error_cell_init:
145#ifdef CONFIG_AFS_FSCACHE
146 fscache_unregister_netfs(&afs_cache_netfs);
147error_cache:
148#endif
149 afs_proc_cleanup();
150error_proc:
151 destroy_workqueue(afs_wq);
152 rcu_barrier();
153 printk(KERN_ERR "kAFS: failed to register: %d\n", ret);
154 return ret;
155}
156
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 */
161
162/*
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();
170 afs_kill_lock_manager();
171 afs_close_socket();
172 afs_purge_servers();
173 afs_callback_update_kill();
174 afs_vlocation_purge();
175 destroy_workqueue(afs_wq);
176 afs_cell_purge();
177#ifdef CONFIG_AFS_FSCACHE
178 fscache_unregister_netfs(&afs_cache_netfs);
179#endif
180 afs_proc_cleanup();
181 rcu_barrier();
182}
183
184module_exit(afs_exit);