1 /*
2 * X.25 Packet Layer release 002
3 *
4 * This is ALPHA test software. This code may break your machine,
5 * randomly fail to work with new releases, misbehave and/or generally
6 * screw up. It might even work.
7 *
8 * This code REQUIRES 2.4 with seq_file support
9 *
10 * This module:
11 * This module is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version
14 * 2 of the License, or (at your option) any later version.
15 *
16 * History
17 * 2002/10/06 Arnaldo Carvalho de Melo seq_file support
18 */
19
20 #include <linux/init.h>
21 #include <linux/proc_fs.h>
22 #include <linux/seq_file.h>
23 #include <net/net_namespace.h>
24 #include <net/sock.h>
25 #include <net/x25.h>
26
27 #ifdef CONFIG_PROC_FS
28 static __inline__ struct x25_route *x25_get_route_idx(loff_t pos)
29 {
30 struct list_head *route_entry;
31 struct x25_route *rt = NULL;
32
33 list_for_each(route_entry, &x25_route_list) {
34 rt = list_entry(route_entry, struct x25_route, node);
35 if (!pos--)
36 goto found;
37 }
38 rt = NULL;
39 found:
40 return rt;
41 }
42
43 static void *x25_seq_route_start(struct seq_file *seq, loff_t *pos)
44 __acquires(x25_route_list_lock)
45 {
46 loff_t l = *pos;
47
48 read_lock_bh(&x25_route_list_lock);
49 return l ? x25_get_route_idx(--l) : SEQ_START_TOKEN;
50 }
51
52 static void *x25_seq_route_next(struct seq_file *seq, void *v, loff_t *pos)
53 {
54 struct x25_route *rt;
55
56 ++*pos;
57 if (v == SEQ_START_TOKEN) {
58 rt = NULL;
59 if (!list_empty(&x25_route_list))
60 rt = list_entry(x25_route_list.next,
61 struct x25_route, node);
62 goto out;
63 }
64 rt = v;
65 if (rt->node.next != &x25_route_list)
66 rt = list_entry(rt->node.next, struct x25_route, node);
67 else
68 rt = NULL;
69 out:
70 return rt;
71 }
72
73 static void x25_seq_route_stop(struct seq_file *seq, void *v)
74 __releases(x25_route_list_lock)
75 {
76 read_unlock_bh(&x25_route_list_lock);
77 }
78
79 static int x25_seq_route_show(struct seq_file *seq, void *v)
80 {
81 struct x25_route *rt;
82
83 if (v == SEQ_START_TOKEN) {
84 seq_puts(seq, "Address Digits Device\n");
85 goto out;
86 }
87
88 rt = v;
89 seq_printf(seq, "%-15s %-6d %-5s\n",
90 rt->address.x25_addr, rt->sigdigits,
91 rt->dev ? rt->dev->name : "???");
92 out:
93 return 0;
94 }
95
96 static __inline__ struct sock *x25_get_socket_idx(loff_t pos)
97 {
98 struct sock *s;
99 struct hlist_node *node;
100
101 sk_for_each(s, node, &x25_list)
102 if (!pos--)
103 goto found;
104 s = NULL;
105 found:
106 return s;
107 }
108
109 static void *x25_seq_socket_start(struct seq_file *seq, loff_t *pos)
110 __acquires(x25_list_lock)
111 {
112 loff_t l = *pos;
113
114 read_lock_bh(&x25_list_lock);
115 return l ? x25_get_socket_idx(--l) : SEQ_START_TOKEN;
116 }
117
118 static void *x25_seq_socket_next(struct seq_file *seq, void *v, loff_t *pos)
119 {
120 struct sock *s;
121
122 ++*pos;
123 if (v == SEQ_START_TOKEN) {
124 s = sk_head(&x25_list);
125 goto out;
126 }
127 s = sk_next(v);
128 out:
129 return s;
130 }
131
132 static void x25_seq_socket_stop(struct seq_file *seq, void *v)
133 __releases(x25_list_lock)
134 {
135 read_unlock_bh(&x25_list_lock);
136 }
137
138 static int x25_seq_socket_show(struct seq_file *seq, void *v)
139 {
140 struct sock *s;
141 struct x25_sock *x25;
142 struct net_device *dev;
143 const char *devname;
144
145 if (v == SEQ_START_TOKEN) {
146 seq_printf(seq, "dest_addr src_addr dev lci st vs vr "
147 "va t t2 t21 t22 t23 Snd-Q Rcv-Q inode\n");
148 goto out;
149 }
150
151 s = v;
152 x25 = x25_sk(s);
153
154 if (!x25->neighbour || (dev = x25->neighbour->dev) == NULL)
155 devname = "???";
156 else
157 devname = x25->neighbour->dev->name;
158
159 seq_printf(seq, "%-10s %-10s %-5s %3.3X %d %d %d %d %3lu %3lu "
160 "%3lu %3lu %3lu %5d %5d %ld\n",
161 !x25->dest_addr.x25_addr[0] ? "*" : x25->dest_addr.x25_addr,
162 !x25->source_addr.x25_addr[0] ? "*" : x25->source_addr.x25_addr,
163 devname, x25->lci & 0x0FFF, x25->state, x25->vs, x25->vr,
164 x25->va, x25_display_timer(s) / HZ, x25->t2 / HZ,
165 x25->t21 / HZ, x25->t22 / HZ, x25->t23 / HZ,
166 sk_wmem_alloc_get(s),
167 sk_rmem_alloc_get(s),
168 s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
169 out:
170 return 0;
171 }
172
173 static __inline__ struct x25_forward *x25_get_forward_idx(loff_t pos)
174 {
175 struct x25_forward *f;
176 struct list_head *entry;
177
178 list_for_each(entry, &x25_forward_list) {
179 f = list_entry(entry, struct x25_forward, node);
180 if (!pos--)
181 goto found;
182 }
183
184 f = NULL;
185 found:
186 return f;
187 }
188
189 static void *x25_seq_forward_start(struct seq_file *seq, loff_t *pos)
190 __acquires(x25_forward_list_lock)
191 {
192 loff_t l = *pos;
193
194 read_lock_bh(&x25_forward_list_lock);
195 return l ? x25_get_forward_idx(--l) : SEQ_START_TOKEN;
196 }
197
198 static void *x25_seq_forward_next(struct seq_file *seq, void *v, loff_t *pos)
199 {
200 struct x25_forward *f;
201
202 ++*pos;
203 if (v == SEQ_START_TOKEN) {
204 f = NULL;
205 if (!list_empty(&x25_forward_list))
206 f = list_entry(x25_forward_list.next,
207 struct x25_forward, node);
208 goto out;
209 }
210 f = v;
211 if (f->node.next != &x25_forward_list)
212 f = list_entry(f->node.next, struct x25_forward, node);
213 else
214 f = NULL;
215 out:
216 return f;
217
218 }
219
220 static void x25_seq_forward_stop(struct seq_file *seq, void *v)
221 __releases(x25_forward_list_lock)
222 {
223 read_unlock_bh(&x25_forward_list_lock);
224 }
225
226 static int x25_seq_forward_show(struct seq_file *seq, void *v)
227 {
228 struct x25_forward *f;
229
230 if (v == SEQ_START_TOKEN) {
231 seq_printf(seq, "lci dev1 dev2\n");
232 goto out;
233 }
234
235 f = v;
236
237 seq_printf(seq, "%d %-10s %-10s\n",
238 f->lci, f->dev1->name, f->dev2->name);
239
240 out:
241 return 0;
242 }
243
244 static const struct seq_operations x25_seq_route_ops = {
245 .start = x25_seq_route_start,
246 .next = x25_seq_route_next,
247 .stop = x25_seq_route_stop,
248 .show = x25_seq_route_show,
249 };
250
251 static const struct seq_operations x25_seq_socket_ops = {
252 .start = x25_seq_socket_start,
253 .next = x25_seq_socket_next,
254 .stop = x25_seq_socket_stop,
255 .show = x25_seq_socket_show,
256 };
257
258 static const struct seq_operations x25_seq_forward_ops = {
259 .start = x25_seq_forward_start,
260 .next = x25_seq_forward_next,
261 .stop = x25_seq_forward_stop,
262 .show = x25_seq_forward_show,
263 };
264
265 static int x25_seq_socket_open(struct inode *inode, struct file *file)
266 {
267 return seq_open(file, &x25_seq_socket_ops);
268 }
269
270 static int x25_seq_route_open(struct inode *inode, struct file *file)
271 {
272 return seq_open(file, &x25_seq_route_ops);
273 }
274
275 static int x25_seq_forward_open(struct inode *inode, struct file *file)
276 {
277 return seq_open(file, &x25_seq_forward_ops);
278 }
279
280 static const struct file_operations x25_seq_socket_fops = {
281 .owner = THIS_MODULE,
282 .open = x25_seq_socket_open,
283 .read = seq_read,
284 .llseek = seq_lseek,
285 .release = seq_release,
286 };
287
288 static const struct file_operations x25_seq_route_fops = {
289 .owner = THIS_MODULE,
290 .open = x25_seq_route_open,
291 .read = seq_read,
292 .llseek = seq_lseek,
293 .release = seq_release,
294 };
295
296 static const struct file_operations x25_seq_forward_fops = {
297 .owner = THIS_MODULE,
298 .open = x25_seq_forward_open,
299 .read = seq_read,
300 .llseek = seq_lseek,
301 .release = seq_release,
302 };
303
304 static struct proc_dir_entry *x25_proc_dir;
305
306 int __init x25_proc_init(void)
307 {
308 struct proc_dir_entry *p;
309 int rc = -ENOMEM;
310
311 x25_proc_dir = proc_mkdir("x25", init_net.proc_net);
312 if (!x25_proc_dir)
313 goto out;
314
315 p = proc_create("route", S_IRUGO, x25_proc_dir, &x25_seq_route_fops);
316 if (!p)
317 goto out_route;
318
319 p = proc_create("socket", S_IRUGO, x25_proc_dir, &x25_seq_socket_fops);
320 if (!p)
321 goto out_socket;
322
323 p = proc_create("forward", S_IRUGO, x25_proc_dir,
324 &x25_seq_forward_fops);
325 if (!p)
326 goto out_forward;
327 rc = 0;
328
329 out:
330 return rc;
331 out_forward:
332 remove_proc_entry("socket", x25_proc_dir);
333 out_socket:
334 remove_proc_entry("route", x25_proc_dir);
335 out_route:
336 remove_proc_entry("x25", init_net.proc_net);
337 goto out;
338 }
339
340 void __exit x25_proc_exit(void)
341 {
342 remove_proc_entry("forward", x25_proc_dir);
343 remove_proc_entry("route", x25_proc_dir);
344 remove_proc_entry("socket", x25_proc_dir);
345 remove_proc_entry("x25", init_net.proc_net);
346 }
347
348 #else /* CONFIG_PROC_FS */
349
350 int __init x25_proc_init(void)
351 {
352 return 0;
353 }
354
355 void __exit x25_proc_exit(void)
356 {
357 }
358 #endif /* CONFIG_PROC_FS */
359
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