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
29static void *x25_seq_route_start(struct seq_file *seq, loff_t *pos)
30	__acquires(x25_route_list_lock)
31{
32	read_lock_bh(&x25_route_list_lock);
33	return seq_list_start_head(&x25_route_list, *pos);
34}
35
36static void *x25_seq_route_next(struct seq_file *seq, void *v, loff_t *pos)
37{
38	return seq_list_next(v, &x25_route_list, pos);
39}
40
41static void x25_seq_route_stop(struct seq_file *seq, void *v)
42	__releases(x25_route_list_lock)
43{
44	read_unlock_bh(&x25_route_list_lock);
45}
46
47static int x25_seq_route_show(struct seq_file *seq, void *v)
48{
49	struct x25_route *rt = list_entry(v, struct x25_route, node);
50
51	if (v == &x25_route_list) {
52		seq_puts(seq, "Address          Digits  Device\n");
53		goto out;
54	}
55
56	rt = v;
57	seq_printf(seq, "%-15s  %-6d  %-5s\n",
58		   rt->address.x25_addr, rt->sigdigits,
59		   rt->dev ? rt->dev->name : "???");
60out:
61	return 0;
62}
63
64static void *x25_seq_socket_start(struct seq_file *seq, loff_t *pos)
65	__acquires(x25_list_lock)
66{
67	read_lock_bh(&x25_list_lock);
68	return seq_hlist_start_head(&x25_list, *pos);
69}
70
71static void *x25_seq_socket_next(struct seq_file *seq, void *v, loff_t *pos)
72{
73	return seq_hlist_next(v, &x25_list, pos);
74}
75
76static void x25_seq_socket_stop(struct seq_file *seq, void *v)
77	__releases(x25_list_lock)
78{
79	read_unlock_bh(&x25_list_lock);
80}
81
82static int x25_seq_socket_show(struct seq_file *seq, void *v)
83{
84	struct sock *s;
85	struct x25_sock *x25;
86	struct net_device *dev;
87	const char *devname;
88
89	if (v == SEQ_START_TOKEN) {
90		seq_printf(seq, "dest_addr  src_addr   dev   lci st vs vr "
91				"va   t  t2 t21 t22 t23 Snd-Q Rcv-Q inode\n");
92		goto out;
93	}
94
95	s = sk_entry(v);
96	x25 = x25_sk(s);
97
98	if (!x25->neighbour || (dev = x25->neighbour->dev) == NULL)
99		devname = "???";
100	else
101		devname = x25->neighbour->dev->name;
102
103	seq_printf(seq, "%-10s %-10s %-5s %3.3X  %d  %d  %d  %d %3lu %3lu "
104			"%3lu %3lu %3lu %5d %5d %ld\n",
105		   !x25->dest_addr.x25_addr[0] ? "*" : x25->dest_addr.x25_addr,
106		   !x25->source_addr.x25_addr[0] ? "*" : x25->source_addr.x25_addr,
107		   devname, x25->lci & 0x0FFF, x25->state, x25->vs, x25->vr,
108		   x25->va, x25_display_timer(s) / HZ, x25->t2  / HZ,
109		   x25->t21 / HZ, x25->t22 / HZ, x25->t23 / HZ,
110		   sk_wmem_alloc_get(s),
111		   sk_rmem_alloc_get(s),
112		   s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
113out:
114	return 0;
115}
116
117static void *x25_seq_forward_start(struct seq_file *seq, loff_t *pos)
118	__acquires(x25_forward_list_lock)
119{
120	read_lock_bh(&x25_forward_list_lock);
121	return seq_list_start_head(&x25_forward_list, *pos);
122}
123
124static void *x25_seq_forward_next(struct seq_file *seq, void *v, loff_t *pos)
125{
126	return seq_list_next(v, &x25_forward_list, pos);
127}
128
129static void x25_seq_forward_stop(struct seq_file *seq, void *v)
130	__releases(x25_forward_list_lock)
131{
132	read_unlock_bh(&x25_forward_list_lock);
133}
134
135static int x25_seq_forward_show(struct seq_file *seq, void *v)
136{
137	struct x25_forward *f = list_entry(v, struct x25_forward, node);
138
139	if (v == &x25_forward_list) {
140		seq_printf(seq, "lci dev1       dev2\n");
141		goto out;
142	}
143
144	f = v;
145
146	seq_printf(seq, "%d %-10s %-10s\n",
147			f->lci, f->dev1->name, f->dev2->name);
148out:
149	return 0;
150}
151
152static const struct seq_operations x25_seq_route_ops = {
153	.start  = x25_seq_route_start,
154	.next   = x25_seq_route_next,
155	.stop   = x25_seq_route_stop,
156	.show   = x25_seq_route_show,
157};
158
159static const struct seq_operations x25_seq_socket_ops = {
160	.start  = x25_seq_socket_start,
161	.next   = x25_seq_socket_next,
162	.stop   = x25_seq_socket_stop,
163	.show   = x25_seq_socket_show,
164};
165
166static const struct seq_operations x25_seq_forward_ops = {
167	.start  = x25_seq_forward_start,
168	.next   = x25_seq_forward_next,
169	.stop   = x25_seq_forward_stop,
170	.show   = x25_seq_forward_show,
171};
172
173static int x25_seq_socket_open(struct inode *inode, struct file *file)
174{
175	return seq_open(file, &x25_seq_socket_ops);
176}
177
178static int x25_seq_route_open(struct inode *inode, struct file *file)
179{
180	return seq_open(file, &x25_seq_route_ops);
181}
182
183static int x25_seq_forward_open(struct inode *inode, struct file *file)
184{
185	return seq_open(file, &x25_seq_forward_ops);
186}
187
188static const struct file_operations x25_seq_socket_fops = {
189	.owner		= THIS_MODULE,
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	.owner		= THIS_MODULE,
198	.open		= x25_seq_route_open,
199	.read		= seq_read,
200	.llseek		= seq_lseek,
201	.release	= seq_release,
202};
203
204static const struct file_operations x25_seq_forward_fops = {
205	.owner		= THIS_MODULE,
206	.open		= x25_seq_forward_open,
207	.read		= seq_read,
208	.llseek		= seq_lseek,
209	.release	= seq_release,
210};
211
212static struct proc_dir_entry *x25_proc_dir;
213
214int __init x25_proc_init(void)
215{
216	struct proc_dir_entry *p;
217	int rc = -ENOMEM;
218
219	x25_proc_dir = proc_mkdir("x25", init_net.proc_net);
220	if (!x25_proc_dir)
221		goto out;
222
223	p = proc_create("route", S_IRUGO, x25_proc_dir, &x25_seq_route_fops);
224	if (!p)
225		goto out_route;
226
227	p = proc_create("socket", S_IRUGO, x25_proc_dir, &x25_seq_socket_fops);
228	if (!p)
229		goto out_socket;
230
231	p = proc_create("forward", S_IRUGO, x25_proc_dir,
232			&x25_seq_forward_fops);
233	if (!p)
234		goto out_forward;
235	rc = 0;
236
237out:
238	return rc;
239out_forward:
240	remove_proc_entry("socket", x25_proc_dir);
241out_socket:
242	remove_proc_entry("route", x25_proc_dir);
243out_route:
244	remove_proc_entry("x25", init_net.proc_net);
245	goto out;
246}
247
248void __exit x25_proc_exit(void)
249{
250	remove_proc_entry("forward", x25_proc_dir);
251	remove_proc_entry("route", x25_proc_dir);
252	remove_proc_entry("socket", x25_proc_dir);
253	remove_proc_entry("x25", init_net.proc_net);
254}
255
256#else /* CONFIG_PROC_FS */
257
258int __init x25_proc_init(void)
259{
260	return 0;
261}
262
263void __exit x25_proc_exit(void)
264{
265}
266#endif /* CONFIG_PROC_FS */
267