xref: /openbmc/linux/net/x25/x25_proc.c (revision 25985edc)
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 
29 static 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 
36 static 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 
41 static 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 
47 static 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 : "???");
60 out:
61 	return 0;
62 }
63 
64 static 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 
71 static 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 
76 static 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 
82 static 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);
113 out:
114 	return 0;
115 }
116 
117 static 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 
124 static 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 
129 static 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 
135 static 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);
148 out:
149 	return 0;
150 }
151 
152 static 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 
159 static 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 
166 static 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 
173 static int x25_seq_socket_open(struct inode *inode, struct file *file)
174 {
175 	return seq_open(file, &x25_seq_socket_ops);
176 }
177 
178 static int x25_seq_route_open(struct inode *inode, struct file *file)
179 {
180 	return seq_open(file, &x25_seq_route_ops);
181 }
182 
183 static int x25_seq_forward_open(struct inode *inode, struct file *file)
184 {
185 	return seq_open(file, &x25_seq_forward_ops);
186 }
187 
188 static 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 
196 static 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 
204 static 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 
212 static struct proc_dir_entry *x25_proc_dir;
213 
214 int __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 
237 out:
238 	return rc;
239 out_forward:
240 	remove_proc_entry("socket", x25_proc_dir);
241 out_socket:
242 	remove_proc_entry("route", x25_proc_dir);
243 out_route:
244 	remove_proc_entry("x25", init_net.proc_net);
245 	goto out;
246 }
247 
248 void __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 
258 int __init x25_proc_init(void)
259 {
260 	return 0;
261 }
262 
263 void __exit x25_proc_exit(void)
264 {
265 }
266 #endif /* CONFIG_PROC_FS */
267