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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);
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);