1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * X.25 Packet Layer release 002
4 *
5 * This is ALPHA test software. This code may break your machine,
6 * randomly fail to work with new releases, misbehave and/or generally
7 * screw up. It might even work.
8 *
9 * This code REQUIRES 2.4 with seq_file support
10 *
11 * History
12 * 2002/10/06 Arnaldo Carvalho de Melo seq_file support
13 */
14
15 #include <linux/init.h>
16 #include <linux/proc_fs.h>
17 #include <linux/seq_file.h>
18 #include <linux/export.h>
19 #include <net/net_namespace.h>
20 #include <net/sock.h>
21 #include <net/x25.h>
22
23 #ifdef CONFIG_PROC_FS
24
25 static void *x25_seq_route_start(struct seq_file *seq, loff_t *pos)
26 __acquires(x25_route_list_lock)
27 {
28 read_lock_bh(&x25_route_list_lock);
29 return seq_list_start_head(&x25_route_list, *pos);
30 }
31
32 static void *x25_seq_route_next(struct seq_file *seq, void *v, loff_t *pos)
33 {
34 return seq_list_next(v, &x25_route_list, pos);
35 }
36
37 static void x25_seq_route_stop(struct seq_file *seq, void *v)
38 __releases(x25_route_list_lock)
39 {
40 read_unlock_bh(&x25_route_list_lock);
41 }
42
43 static int x25_seq_route_show(struct seq_file *seq, void *v)
44 {
45 struct x25_route *rt = list_entry(v, struct x25_route, node);
46
47 if (v == &x25_route_list) {
48 seq_puts(seq, "Address Digits Device\n");
49 goto out;
50 }
51
52 rt = v;
53 seq_printf(seq, "%-15s %-6d %-5s\n",
54 rt->address.x25_addr, rt->sigdigits,
55 rt->dev ? rt->dev->name : "???");
56 out:
57 return 0;
58 }
59
60 static void *x25_seq_socket_start(struct seq_file *seq, loff_t *pos)
61 __acquires(x25_list_lock)
62 {
63 read_lock_bh(&x25_list_lock);
64 return seq_hlist_start_head(&x25_list, *pos);
65 }
66
67 static void *x25_seq_socket_next(struct seq_file *seq, void *v, loff_t *pos)
68 {
69 return seq_hlist_next(v, &x25_list, pos);
70 }
71
72 static void x25_seq_socket_stop(struct seq_file *seq, void *v)
73 __releases(x25_list_lock)
74 {
75 read_unlock_bh(&x25_list_lock);
76 }
77
78 static int x25_seq_socket_show(struct seq_file *seq, void *v)
79 {
80 struct sock *s;
81 struct x25_sock *x25;
82 const char *devname;
83
84 if (v == SEQ_START_TOKEN) {
85 seq_printf(seq, "dest_addr src_addr dev lci st vs vr "
86 "va t t2 t21 t22 t23 Snd-Q Rcv-Q inode\n");
87 goto out;
88 }
89
90 s = sk_entry(v);
91 x25 = x25_sk(s);
92
93 if (!x25->neighbour || !x25->neighbour->dev)
94 devname = "???";
95 else
96 devname = x25->neighbour->dev->name;
97
98 seq_printf(seq, "%-10s %-10s %-5s %3.3X %d %d %d %d %3lu %3lu "
99 "%3lu %3lu %3lu %5d %5d %ld\n",
100 !x25->dest_addr.x25_addr[0] ? "*" : x25->dest_addr.x25_addr,
101 !x25->source_addr.x25_addr[0] ? "*" : x25->source_addr.x25_addr,
102 devname, x25->lci & 0x0FFF, x25->state, x25->vs, x25->vr,
103 x25->va, x25_display_timer(s) / HZ, x25->t2 / HZ,
104 x25->t21 / HZ, x25->t22 / HZ, x25->t23 / HZ,
105 sk_wmem_alloc_get(s),
106 sk_rmem_alloc_get(s),
107 s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
108 out:
109 return 0;
110 }
111
112 static void *x25_seq_forward_start(struct seq_file *seq, loff_t *pos)
113 __acquires(x25_forward_list_lock)
114 {
115 read_lock_bh(&x25_forward_list_lock);
116 return seq_list_start_head(&x25_forward_list, *pos);
117 }
118
119 static void *x25_seq_forward_next(struct seq_file *seq, void *v, loff_t *pos)
120 {
121 return seq_list_next(v, &x25_forward_list, pos);
122 }
123
124 static void x25_seq_forward_stop(struct seq_file *seq, void *v)
125 __releases(x25_forward_list_lock)
126 {
127 read_unlock_bh(&x25_forward_list_lock);
128 }
129
130 static int x25_seq_forward_show(struct seq_file *seq, void *v)
131 {
132 struct x25_forward *f = list_entry(v, struct x25_forward, node);
133
134 if (v == &x25_forward_list) {
135 seq_printf(seq, "lci dev1 dev2\n");
136 goto out;
137 }
138
139 f = v;
140
141 seq_printf(seq, "%d %-10s %-10s\n",
142 f->lci, f->dev1->name, f->dev2->name);
143 out:
144 return 0;
145 }
146
147 static const struct seq_operations x25_seq_route_ops = {
148 .start = x25_seq_route_start,
149 .next = x25_seq_route_next,
150 .stop = x25_seq_route_stop,
151 .show = x25_seq_route_show,
152 };
153
154 static const struct seq_operations x25_seq_socket_ops = {
155 .start = x25_seq_socket_start,
156 .next = x25_seq_socket_next,
157 .stop = x25_seq_socket_stop,
158 .show = x25_seq_socket_show,
159 };
160
161 static const struct seq_operations x25_seq_forward_ops = {
162 .start = x25_seq_forward_start,
163 .next = x25_seq_forward_next,
164 .stop = x25_seq_forward_stop,
165 .show = x25_seq_forward_show,
166 };
167
168 int __init x25_proc_init(void)
169 {
170 if (!proc_mkdir("x25", init_net.proc_net))
171 return -ENOMEM;
172
173 if (!proc_create_seq("x25/route", 0444, init_net.proc_net,
174 &x25_seq_route_ops))
175 goto out;
176
177 if (!proc_create_seq("x25/socket", 0444, init_net.proc_net,
178 &x25_seq_socket_ops))
179 goto out;
180
181 if (!proc_create_seq("x25/forward", 0444, init_net.proc_net,
182 &x25_seq_forward_ops))
183 goto out;
184 return 0;
185
186 out:
187 remove_proc_subtree("x25", init_net.proc_net);
188 return -ENOMEM;
189 }
190
191 void __exit x25_proc_exit(void)
192 {
193 remove_proc_subtree("x25", init_net.proc_net);
194 }
195
196 #else /* CONFIG_PROC_FS */
197
198 int __init x25_proc_init(void)
199 {
200 return 0;
201 }
202
203 void __exit x25_proc_exit(void)
204 {
205 }
206 #endif /* CONFIG_PROC_FS */
207
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