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 <linux/export.h>
24#include <net/net_namespace.h>
25#include <net/sock.h>
26#include <net/x25.h>
27
28#ifdef CONFIG_PROC_FS
29
30static void *x25_seq_route_start(struct seq_file *seq, loff_t *pos)
31	__acquires(x25_route_list_lock)
32{
33	read_lock_bh(&x25_route_list_lock);
34	return seq_list_start_head(&x25_route_list, *pos);
35}
36
37static void *x25_seq_route_next(struct seq_file *seq, void *v, loff_t *pos)
38{
39	return seq_list_next(v, &x25_route_list, pos);
40}
41
42static void x25_seq_route_stop(struct seq_file *seq, void *v)
43	__releases(x25_route_list_lock)
44{
45	read_unlock_bh(&x25_route_list_lock);
46}
47
48static int x25_seq_route_show(struct seq_file *seq, void *v)
49{
50	struct x25_route *rt = list_entry(v, struct x25_route, node);
51
52	if (v == &x25_route_list) {
53		seq_puts(seq, "Address          Digits  Device\n");
54		goto out;
55	}
56
57	rt = v;
58	seq_printf(seq, "%-15s  %-6d  %-5s\n",
59		   rt->address.x25_addr, rt->sigdigits,
60		   rt->dev ? rt->dev->name : "???");
61out:
62	return 0;
63}
64
65static void *x25_seq_socket_start(struct seq_file *seq, loff_t *pos)
66	__acquires(x25_list_lock)
67{
68	read_lock_bh(&x25_list_lock);
69	return seq_hlist_start_head(&x25_list, *pos);
70}
71
72static void *x25_seq_socket_next(struct seq_file *seq, void *v, loff_t *pos)
73{
74	return seq_hlist_next(v, &x25_list, pos);
75}
76
77static void x25_seq_socket_stop(struct seq_file *seq, void *v)
78	__releases(x25_list_lock)
79{
80	read_unlock_bh(&x25_list_lock);
81}
82
83static int x25_seq_socket_show(struct seq_file *seq, void *v)
84{
85	struct sock *s;
86	struct x25_sock *x25;
87	struct net_device *dev;
88	const char *devname;
89
90	if (v == SEQ_START_TOKEN) {
91		seq_printf(seq, "dest_addr  src_addr   dev   lci st vs vr "
92				"va   t  t2 t21 t22 t23 Snd-Q Rcv-Q inode\n");
93		goto out;
94	}
95
96	s = sk_entry(v);
97	x25 = x25_sk(s);
98
99	if (!x25->neighbour || (dev = x25->neighbour->dev) == NULL)
100		devname = "???";
101	else
102		devname = x25->neighbour->dev->name;
103
104	seq_printf(seq, "%-10s %-10s %-5s %3.3X  %d  %d  %d  %d %3lu %3lu "
105			"%3lu %3lu %3lu %5d %5d %ld\n",
106		   !x25->dest_addr.x25_addr[0] ? "*" : x25->dest_addr.x25_addr,
107		   !x25->source_addr.x25_addr[0] ? "*" : x25->source_addr.x25_addr,
108		   devname, x25->lci & 0x0FFF, x25->state, x25->vs, x25->vr,
109		   x25->va, x25_display_timer(s) / HZ, x25->t2  / HZ,
110		   x25->t21 / HZ, x25->t22 / HZ, x25->t23 / HZ,
111		   sk_wmem_alloc_get(s),
112		   sk_rmem_alloc_get(s),
113		   s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
114out:
115	return 0;
116}
117
118static void *x25_seq_forward_start(struct seq_file *seq, loff_t *pos)
119	__acquires(x25_forward_list_lock)
120{
121	read_lock_bh(&x25_forward_list_lock);
122	return seq_list_start_head(&x25_forward_list, *pos);
123}
124
125static void *x25_seq_forward_next(struct seq_file *seq, void *v, loff_t *pos)
126{
127	return seq_list_next(v, &x25_forward_list, pos);
128}
129
130static void x25_seq_forward_stop(struct seq_file *seq, void *v)
131	__releases(x25_forward_list_lock)
132{
133	read_unlock_bh(&x25_forward_list_lock);
134}
135
136static int x25_seq_forward_show(struct seq_file *seq, void *v)
137{
138	struct x25_forward *f = list_entry(v, struct x25_forward, node);
139
140	if (v == &x25_forward_list) {
141		seq_printf(seq, "lci dev1       dev2\n");
142		goto out;
143	}
144
145	f = v;
146
147	seq_printf(seq, "%d %-10s %-10s\n",
148			f->lci, f->dev1->name, f->dev2->name);
149out:
150	return 0;
151}
152
153static const struct seq_operations x25_seq_route_ops = {
154	.start  = x25_seq_route_start,
155	.next   = x25_seq_route_next,
156	.stop   = x25_seq_route_stop,
157	.show   = x25_seq_route_show,
158};
159
160static const struct seq_operations x25_seq_socket_ops = {
161	.start  = x25_seq_socket_start,
162	.next   = x25_seq_socket_next,
163	.stop   = x25_seq_socket_stop,
164	.show   = x25_seq_socket_show,
165};
166
167static const struct seq_operations x25_seq_forward_ops = {
168	.start  = x25_seq_forward_start,
169	.next   = x25_seq_forward_next,
170	.stop   = x25_seq_forward_stop,
171	.show   = x25_seq_forward_show,
172};
173
174static int x25_seq_socket_open(struct inode *inode, struct file *file)
175{
176	return seq_open(file, &x25_seq_socket_ops);
177}
178
179static int x25_seq_route_open(struct inode *inode, struct file *file)
180{
181	return seq_open(file, &x25_seq_route_ops);
182}
183
184static int x25_seq_forward_open(struct inode *inode, struct file *file)
185{
186	return seq_open(file, &x25_seq_forward_ops);
187}
188
189static const struct file_operations x25_seq_socket_fops = {
190	.open		= x25_seq_socket_open,
191	.read		= seq_read,
192	.llseek		= seq_lseek,
193	.release	= seq_release,
194};
195
196static const struct file_operations x25_seq_route_fops = {
197	.open		= x25_seq_route_open,
198	.read		= seq_read,
199	.llseek		= seq_lseek,
200	.release	= seq_release,
201};
202
203static const struct file_operations x25_seq_forward_fops = {
204	.open		= x25_seq_forward_open,
205	.read		= seq_read,
206	.llseek		= seq_lseek,
207	.release	= seq_release,
208};
209
210int __init x25_proc_init(void)
211{
212	if (!proc_mkdir("x25", init_net.proc_net))
213		return -ENOMEM;
214
215	if (!proc_create("x25/route", S_IRUGO, init_net.proc_net,
216			&x25_seq_route_fops))
217		goto out;
218
219	if (!proc_create("x25/socket", S_IRUGO, init_net.proc_net,
220			&x25_seq_socket_fops))
221		goto out;
222
223	if (!proc_create("x25/forward", S_IRUGO, init_net.proc_net,
224			&x25_seq_forward_fops))
225		goto out;
226	return 0;
227
228out:
229	remove_proc_subtree("x25", init_net.proc_net);
230	return -ENOMEM;
231}
232
233void __exit x25_proc_exit(void)
234{
235	remove_proc_subtree("x25", init_net.proc_net);
236}
237
238#else /* CONFIG_PROC_FS */
239
240int __init x25_proc_init(void)
241{
242	return 0;
243}
244
245void __exit x25_proc_exit(void)
246{
247}
248#endif /* CONFIG_PROC_FS */
249