1 /* ip_conntrack proc compat - based on ip_conntrack_standalone.c
2 *
3 * (C) 1999-2001 Paul `Rusty' Russell
4 * (C) 2002-2006 Netfilter Core Team <coreteam@netfilter.org>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10 #include <linux/types.h>
11 #include <linux/proc_fs.h>
12 #include <linux/seq_file.h>
13 #include <linux/percpu.h>
14 #include <net/net_namespace.h>
15
16 #include <linux/netfilter.h>
17 #include <net/netfilter/nf_conntrack_core.h>
18 #include <net/netfilter/nf_conntrack_l3proto.h>
19 #include <net/netfilter/nf_conntrack_l4proto.h>
20 #include <net/netfilter/nf_conntrack_expect.h>
21
22 #ifdef CONFIG_NF_CT_ACCT
23 static unsigned int
24 seq_print_counters(struct seq_file *s,
25 const struct ip_conntrack_counter *counter)
26 {
27 return seq_printf(s, "packets=%llu bytes=%llu ",
28 (unsigned long long)counter->packets,
29 (unsigned long long)counter->bytes);
30 }
31 #else
32 #define seq_print_counters(x, y) 0
33 #endif
34
35 struct ct_iter_state {
36 unsigned int bucket;
37 };
38
39 static struct hlist_node *ct_get_first(struct seq_file *seq)
40 {
41 struct ct_iter_state *st = seq->private;
42 struct hlist_node *n;
43
44 for (st->bucket = 0;
45 st->bucket < nf_conntrack_htable_size;
46 st->bucket++) {
47 n = rcu_dereference(nf_conntrack_hash[st->bucket].first);
48 if (n)
49 return n;
50 }
51 return NULL;
52 }
53
54 static struct hlist_node *ct_get_next(struct seq_file *seq,
55 struct hlist_node *head)
56 {
57 struct ct_iter_state *st = seq->private;
58
59 head = rcu_dereference(head->next);
60 while (head == NULL) {
61 if (++st->bucket >= nf_conntrack_htable_size)
62 return NULL;
63 head = rcu_dereference(nf_conntrack_hash[st->bucket].first);
64 }
65 return head;
66 }
67
68 static struct hlist_node *ct_get_idx(struct seq_file *seq, loff_t pos)
69 {
70 struct hlist_node *head = ct_get_first(seq);
71
72 if (head)
73 while (pos && (head = ct_get_next(seq, head)))
74 pos--;
75 return pos ? NULL : head;
76 }
77
78 static void *ct_seq_start(struct seq_file *seq, loff_t *pos)
79 __acquires(RCU)
80 {
81 rcu_read_lock();
82 return ct_get_idx(seq, *pos);
83 }
84
85 static void *ct_seq_next(struct seq_file *s, void *v, loff_t *pos)
86 {
87 (*pos)++;
88 return ct_get_next(s, v);
89 }
90
91 static void ct_seq_stop(struct seq_file *s, void *v)
92 __releases(RCU)
93 {
94 rcu_read_unlock();
95 }
96
97 static int ct_seq_show(struct seq_file *s, void *v)
98 {
99 const struct nf_conntrack_tuple_hash *hash = v;
100 const struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(hash);
101 const struct nf_conntrack_l3proto *l3proto;
102 const struct nf_conntrack_l4proto *l4proto;
103
104 NF_CT_ASSERT(ct);
105
106 /* we only want to print DIR_ORIGINAL */
107 if (NF_CT_DIRECTION(hash))
108 return 0;
109 if (ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.l3num != AF_INET)
110 return 0;
111
112 l3proto = __nf_ct_l3proto_find(ct->tuplehash[IP_CT_DIR_ORIGINAL]
113 .tuple.src.l3num);
114 NF_CT_ASSERT(l3proto);
115 l4proto = __nf_ct_l4proto_find(ct->tuplehash[IP_CT_DIR_ORIGINAL]
116 .tuple.src.l3num,
117 ct->tuplehash[IP_CT_DIR_ORIGINAL]
118 .tuple.dst.protonum);
119 NF_CT_ASSERT(l4proto);
120
121 if (seq_printf(s, "%-8s %u %ld ",
122 l4proto->name,
123 ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.protonum,
124 timer_pending(&ct->timeout)
125 ? (long)(ct->timeout.expires - jiffies)/HZ : 0) != 0)
126 return -ENOSPC;
127
128 if (l4proto->print_conntrack && l4proto->print_conntrack(s, ct))
129 return -ENOSPC;
130
131 if (print_tuple(s, &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
132 l3proto, l4proto))
133 return -ENOSPC;
134
135 if (seq_print_counters(s, &ct->counters[IP_CT_DIR_ORIGINAL]))
136 return -ENOSPC;
137
138 if (!(test_bit(IPS_SEEN_REPLY_BIT, &ct->status)))
139 if (seq_printf(s, "[UNREPLIED] "))
140 return -ENOSPC;
141
142 if (print_tuple(s, &ct->tuplehash[IP_CT_DIR_REPLY].tuple,
143 l3proto, l4proto))
144 return -ENOSPC;
145
146 if (seq_print_counters(s, &ct->counters[IP_CT_DIR_REPLY]))
147 return -ENOSPC;
148
149 if (test_bit(IPS_ASSURED_BIT, &ct->status))
150 if (seq_printf(s, "[ASSURED] "))
151 return -ENOSPC;
152
153 #ifdef CONFIG_NF_CONNTRACK_MARK
154 if (seq_printf(s, "mark=%u ", ct->mark))
155 return -ENOSPC;
156 #endif
157
158 #ifdef CONFIG_NF_CONNTRACK_SECMARK
159 if (seq_printf(s, "secmark=%u ", ct->secmark))
160 return -ENOSPC;
161 #endif
162
163 if (seq_printf(s, "use=%u\n", atomic_read(&ct->ct_general.use)))
164 return -ENOSPC;
165
166 return 0;
167 }
168
169 static const struct seq_operations ct_seq_ops = {
170 .start = ct_seq_start,
171 .next = ct_seq_next,
172 .stop = ct_seq_stop,
173 .show = ct_seq_show
174 };
175
176 static int ct_open(struct inode *inode, struct file *file)
177 {
178 return seq_open_private(file, &ct_seq_ops,
179 sizeof(struct ct_iter_state));
180 }
181
182 static const struct file_operations ct_file_ops = {
183 .owner = THIS_MODULE,
184 .open = ct_open,
185 .read = seq_read,
186 .llseek = seq_lseek,
187 .release = seq_release_private,
188 };
189
190 /* expects */
191 struct ct_expect_iter_state {
192 unsigned int bucket;
193 };
194
195 static struct hlist_node *ct_expect_get_first(struct seq_file *seq)
196 {
197 struct ct_expect_iter_state *st = seq->private;
198 struct hlist_node *n;
199
200 for (st->bucket = 0; st->bucket < nf_ct_expect_hsize; st->bucket++) {
201 n = rcu_dereference(nf_ct_expect_hash[st->bucket].first);
202 if (n)
203 return n;
204 }
205 return NULL;
206 }
207
208 static struct hlist_node *ct_expect_get_next(struct seq_file *seq,
209 struct hlist_node *head)
210 {
211 struct ct_expect_iter_state *st = seq->private;
212
213 head = rcu_dereference(head->next);
214 while (head == NULL) {
215 if (++st->bucket >= nf_ct_expect_hsize)
216 return NULL;
217 head = rcu_dereference(nf_ct_expect_hash[st->bucket].first);
218 }
219 return head;
220 }
221
222 static struct hlist_node *ct_expect_get_idx(struct seq_file *seq, loff_t pos)
223 {
224 struct hlist_node *head = ct_expect_get_first(seq);
225
226 if (head)
227 while (pos && (head = ct_expect_get_next(seq, head)))
228 pos--;
229 return pos ? NULL : head;
230 }
231
232 static void *exp_seq_start(struct seq_file *seq, loff_t *pos)
233 __acquires(RCU)
234 {
235 rcu_read_lock();
236 return ct_expect_get_idx(seq, *pos);
237 }
238
239 static void *exp_seq_next(struct seq_file *seq, void *v, loff_t *pos)
240 {
241 (*pos)++;
242 return ct_expect_get_next(seq, v);
243 }
244
245 static void exp_seq_stop(struct seq_file *seq, void *v)
246 __releases(RCU)
247 {
248 rcu_read_unlock();
249 }
250
251 static int exp_seq_show(struct seq_file *s, void *v)
252 {
253 struct nf_conntrack_expect *exp;
254 const struct hlist_node *n = v;
255
256 exp = hlist_entry(n, struct nf_conntrack_expect, hnode);
257
258 if (exp->tuple.src.l3num != AF_INET)
259 return 0;
260
261 if (exp->timeout.function)
262 seq_printf(s, "%ld ", timer_pending(&exp->timeout)
263 ? (long)(exp->timeout.expires - jiffies)/HZ : 0);
264 else
265 seq_printf(s, "- ");
266
267 seq_printf(s, "proto=%u ", exp->tuple.dst.protonum);
268
269 print_tuple(s, &exp->tuple,
270 __nf_ct_l3proto_find(exp->tuple.src.l3num),
271 __nf_ct_l4proto_find(exp->tuple.src.l3num,
272 exp->tuple.dst.protonum));
273 return seq_putc(s, '\n');
274 }
275
276 static const struct seq_operations exp_seq_ops = {
277 .start = exp_seq_start,
278 .next = exp_seq_next,
279 .stop = exp_seq_stop,
280 .show = exp_seq_show
281 };
282
283 static int exp_open(struct inode *inode, struct file *file)
284 {
285 return seq_open_private(file, &exp_seq_ops,
286 sizeof(struct ct_expect_iter_state));
287 }
288
289 static const struct file_operations ip_exp_file_ops = {
290 .owner = THIS_MODULE,
291 .open = exp_open,
292 .read = seq_read,
293 .llseek = seq_lseek,
294 .release = seq_release_private,
295 };
296
297 static void *ct_cpu_seq_start(struct seq_file *seq, loff_t *pos)
298 {
299 int cpu;
300
301 if (*pos == 0)
302 return SEQ_START_TOKEN;
303
304 for (cpu = *pos-1; cpu < NR_CPUS; ++cpu) {
305 if (!cpu_possible(cpu))
306 continue;
307 *pos = cpu+1;
308 return &per_cpu(nf_conntrack_stat, cpu);
309 }
310
311 return NULL;
312 }
313
314 static void *ct_cpu_seq_next(struct seq_file *seq, void *v, loff_t *pos)
315 {
316 int cpu;
317
318 for (cpu = *pos; cpu < NR_CPUS; ++cpu) {
319 if (!cpu_possible(cpu))
320 continue;
321 *pos = cpu+1;
322 return &per_cpu(nf_conntrack_stat, cpu);
323 }
324
325 return NULL;
326 }
327
328 static void ct_cpu_seq_stop(struct seq_file *seq, void *v)
329 {
330 }
331
332 static int ct_cpu_seq_show(struct seq_file *seq, void *v)
333 {
334 unsigned int nr_conntracks = atomic_read(&nf_conntrack_count);
335 const struct ip_conntrack_stat *st = v;
336
337 if (v == SEQ_START_TOKEN) {
338 seq_printf(seq, "entries searched found new invalid ignore delete delete_list insert insert_failed drop early_drop icmp_error expect_new expect_create expect_delete\n");
339 return 0;
340 }
341
342 seq_printf(seq, "%08x %08x %08x %08x %08x %08x %08x %08x "
343 "%08x %08x %08x %08x %08x %08x %08x %08x \n",
344 nr_conntracks,
345 st->searched,
346 st->found,
347 st->new,
348 st->invalid,
349 st->ignore,
350 st->delete,
351 st->delete_list,
352 st->insert,
353 st->insert_failed,
354 st->drop,
355 st->early_drop,
356 st->error,
357
358 st->expect_new,
359 st->expect_create,
360 st->expect_delete
361 );
362 return 0;
363 }
364
365 static const struct seq_operations ct_cpu_seq_ops = {
366 .start = ct_cpu_seq_start,
367 .next = ct_cpu_seq_next,
368 .stop = ct_cpu_seq_stop,
369 .show = ct_cpu_seq_show,
370 };
371
372 static int ct_cpu_seq_open(struct inode *inode, struct file *file)
373 {
374 return seq_open(file, &ct_cpu_seq_ops);
375 }
376
377 static const struct file_operations ct_cpu_seq_fops = {
378 .owner = THIS_MODULE,
379 .open = ct_cpu_seq_open,
380 .read = seq_read,
381 .llseek = seq_lseek,
382 .release = seq_release_private,
383 };
384
385 int __init nf_conntrack_ipv4_compat_init(void)
386 {
387 struct proc_dir_entry *proc, *proc_exp, *proc_stat;
388
389 proc = proc_net_fops_create(&init_net, "ip_conntrack", 0440, &ct_file_ops);
390 if (!proc)
391 goto err1;
392
393 proc_exp = proc_net_fops_create(&init_net, "ip_conntrack_expect", 0440,
394 &ip_exp_file_ops);
395 if (!proc_exp)
396 goto err2;
397
398 proc_stat = proc_create("ip_conntrack", S_IRUGO,
399 init_net.proc_net_stat, &ct_cpu_seq_fops);
400 if (!proc_stat)
401 goto err3;
402 return 0;
403
404 err3:
405 proc_net_remove(&init_net, "ip_conntrack_expect");
406 err2:
407 proc_net_remove(&init_net, "ip_conntrack");
408 err1:
409 return -ENOMEM;
410 }
411
412 void __exit nf_conntrack_ipv4_compat_fini(void)
413 {
414 remove_proc_entry("ip_conntrack", init_net.proc_net_stat);
415 proc_net_remove(&init_net, "ip_conntrack_expect");
416 proc_net_remove(&init_net, "ip_conntrack");
417 }
418
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