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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
28static __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;
39found:
40 return rt;
41}
42
43static 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
52static 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;
69out:
70 return rt;
71}
72
73static 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
79static 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 : "???");
92out:
93 return 0;
94}
95
96static __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;
105found:
106 return s;
107}
108
109static 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
118static 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);
128out:
129 return s;
130}
131
132static 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
138static 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 atomic_read(&s->sk_wmem_alloc),
167 atomic_read(&s->sk_rmem_alloc),
168 s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
169out:
170 return 0;
171}
172
173static __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;
185found:
186 return f;
187}
188
189static 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
198static 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;
215out:
216 return f;
217
218}
219
220static 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
226static 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
240out:
241 return 0;
242}
243
244static 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
251static 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
258static 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
265static int x25_seq_socket_open(struct inode *inode, struct file *file)
266{
267 return seq_open(file, &x25_seq_socket_ops);
268}
269
270static int x25_seq_route_open(struct inode *inode, struct file *file)
271{
272 return seq_open(file, &x25_seq_route_ops);
273}
274
275static int x25_seq_forward_open(struct inode *inode, struct file *file)
276{
277 return seq_open(file, &x25_seq_forward_ops);
278}
279
280static 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
288static 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
296static 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
304static struct proc_dir_entry *x25_proc_dir;
305
306int __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
329out:
330 return rc;
331out_forward:
332 remove_proc_entry("socket", x25_proc_dir);
333out_socket:
334 remove_proc_entry("route", x25_proc_dir);
335out_route:
336 remove_proc_entry("x25", init_net.proc_net);
337 goto out;
338}
339
340void __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
349
350int __init x25_proc_init(void)
351{
352 return 0;
353}
354
355void __exit x25_proc_exit(void)
356{
357}
358#endif