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Commit | Line | Data |
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e4bd8bce PM |
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> | |
1ae4de0c | 14 | #include <linux/security.h> |
457c4cbc | 15 | #include <net/net_namespace.h> |
e4bd8bce PM |
16 | |
17 | #include <linux/netfilter.h> | |
18 | #include <net/netfilter/nf_conntrack_core.h> | |
19 | #include <net/netfilter/nf_conntrack_l3proto.h> | |
20 | #include <net/netfilter/nf_conntrack_l4proto.h> | |
21 | #include <net/netfilter/nf_conntrack_expect.h> | |
58401572 | 22 | #include <net/netfilter/nf_conntrack_acct.h> |
e4bd8bce PM |
23 | |
24 | struct ct_iter_state { | |
5e6b2997 | 25 | struct seq_net_private p; |
e4bd8bce PM |
26 | unsigned int bucket; |
27 | }; | |
28 | ||
ea781f19 | 29 | static struct hlist_nulls_node *ct_get_first(struct seq_file *seq) |
e4bd8bce | 30 | { |
5e6b2997 | 31 | struct net *net = seq_file_net(seq); |
e4bd8bce | 32 | struct ct_iter_state *st = seq->private; |
ea781f19 | 33 | struct hlist_nulls_node *n; |
e4bd8bce PM |
34 | |
35 | for (st->bucket = 0; | |
d696c7bd | 36 | st->bucket < net->ct.htable_size; |
e4bd8bce | 37 | st->bucket++) { |
5e6b2997 | 38 | n = rcu_dereference(net->ct.hash[st->bucket].first); |
ea781f19 | 39 | if (!is_a_nulls(n)) |
76507f69 | 40 | return n; |
e4bd8bce PM |
41 | } |
42 | return NULL; | |
43 | } | |
44 | ||
ea781f19 ED |
45 | static struct hlist_nulls_node *ct_get_next(struct seq_file *seq, |
46 | struct hlist_nulls_node *head) | |
e4bd8bce | 47 | { |
5e6b2997 | 48 | struct net *net = seq_file_net(seq); |
e4bd8bce PM |
49 | struct ct_iter_state *st = seq->private; |
50 | ||
76507f69 | 51 | head = rcu_dereference(head->next); |
ea781f19 ED |
52 | while (is_a_nulls(head)) { |
53 | if (likely(get_nulls_value(head) == st->bucket)) { | |
d696c7bd | 54 | if (++st->bucket >= net->ct.htable_size) |
ea781f19 ED |
55 | return NULL; |
56 | } | |
5e6b2997 | 57 | head = rcu_dereference(net->ct.hash[st->bucket].first); |
e4bd8bce PM |
58 | } |
59 | return head; | |
60 | } | |
61 | ||
ea781f19 | 62 | static struct hlist_nulls_node *ct_get_idx(struct seq_file *seq, loff_t pos) |
e4bd8bce | 63 | { |
ea781f19 | 64 | struct hlist_nulls_node *head = ct_get_first(seq); |
e4bd8bce PM |
65 | |
66 | if (head) | |
67 | while (pos && (head = ct_get_next(seq, head))) | |
68 | pos--; | |
69 | return pos ? NULL : head; | |
70 | } | |
71 | ||
72 | static void *ct_seq_start(struct seq_file *seq, loff_t *pos) | |
76507f69 | 73 | __acquires(RCU) |
e4bd8bce | 74 | { |
76507f69 | 75 | rcu_read_lock(); |
e4bd8bce PM |
76 | return ct_get_idx(seq, *pos); |
77 | } | |
78 | ||
79 | static void *ct_seq_next(struct seq_file *s, void *v, loff_t *pos) | |
80 | { | |
81 | (*pos)++; | |
82 | return ct_get_next(s, v); | |
83 | } | |
84 | ||
85 | static void ct_seq_stop(struct seq_file *s, void *v) | |
76507f69 | 86 | __releases(RCU) |
e4bd8bce | 87 | { |
76507f69 | 88 | rcu_read_unlock(); |
e4bd8bce PM |
89 | } |
90 | ||
1ae4de0c EP |
91 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
92 | static int ct_show_secctx(struct seq_file *s, const struct nf_conn *ct) | |
93 | { | |
94 | int ret; | |
95 | u32 len; | |
96 | char *secctx; | |
97 | ||
98 | ret = security_secid_to_secctx(ct->secmark, &secctx, &len); | |
99 | if (ret) | |
100 | return ret; | |
101 | ||
102 | ret = seq_printf(s, "secctx=%s ", secctx); | |
103 | ||
104 | security_release_secctx(secctx, len); | |
105 | return ret; | |
106 | } | |
107 | #else | |
108 | static inline int ct_show_secctx(struct seq_file *s, const struct nf_conn *ct) | |
109 | { | |
110 | return 0; | |
111 | } | |
112 | #endif | |
113 | ||
e4bd8bce PM |
114 | static int ct_seq_show(struct seq_file *s, void *v) |
115 | { | |
ea781f19 ED |
116 | struct nf_conntrack_tuple_hash *hash = v; |
117 | struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(hash); | |
32948588 JE |
118 | const struct nf_conntrack_l3proto *l3proto; |
119 | const struct nf_conntrack_l4proto *l4proto; | |
ea781f19 | 120 | int ret = 0; |
e4bd8bce PM |
121 | |
122 | NF_CT_ASSERT(ct); | |
ea781f19 ED |
123 | if (unlikely(!atomic_inc_not_zero(&ct->ct_general.use))) |
124 | return 0; | |
125 | ||
e4bd8bce PM |
126 | |
127 | /* we only want to print DIR_ORIGINAL */ | |
128 | if (NF_CT_DIRECTION(hash)) | |
ea781f19 | 129 | goto release; |
5e8fbe2a | 130 | if (nf_ct_l3num(ct) != AF_INET) |
ea781f19 | 131 | goto release; |
e4bd8bce | 132 | |
5e8fbe2a | 133 | l3proto = __nf_ct_l3proto_find(nf_ct_l3num(ct)); |
e4bd8bce | 134 | NF_CT_ASSERT(l3proto); |
5e8fbe2a | 135 | l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct)); |
e4bd8bce PM |
136 | NF_CT_ASSERT(l4proto); |
137 | ||
ea781f19 | 138 | ret = -ENOSPC; |
e4bd8bce | 139 | if (seq_printf(s, "%-8s %u %ld ", |
5e8fbe2a | 140 | l4proto->name, nf_ct_protonum(ct), |
e4bd8bce PM |
141 | timer_pending(&ct->timeout) |
142 | ? (long)(ct->timeout.expires - jiffies)/HZ : 0) != 0) | |
ea781f19 | 143 | goto release; |
e4bd8bce | 144 | |
c71e9167 | 145 | if (l4proto->print_conntrack && l4proto->print_conntrack(s, ct)) |
ea781f19 | 146 | goto release; |
e4bd8bce PM |
147 | |
148 | if (print_tuple(s, &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple, | |
149 | l3proto, l4proto)) | |
ea781f19 | 150 | goto release; |
e4bd8bce | 151 | |
58401572 | 152 | if (seq_print_acct(s, ct, IP_CT_DIR_ORIGINAL)) |
ea781f19 | 153 | goto release; |
e4bd8bce PM |
154 | |
155 | if (!(test_bit(IPS_SEEN_REPLY_BIT, &ct->status))) | |
156 | if (seq_printf(s, "[UNREPLIED] ")) | |
ea781f19 | 157 | goto release; |
e4bd8bce PM |
158 | |
159 | if (print_tuple(s, &ct->tuplehash[IP_CT_DIR_REPLY].tuple, | |
160 | l3proto, l4proto)) | |
ea781f19 | 161 | goto release; |
e4bd8bce | 162 | |
58401572 | 163 | if (seq_print_acct(s, ct, IP_CT_DIR_REPLY)) |
ea781f19 | 164 | goto release; |
e4bd8bce PM |
165 | |
166 | if (test_bit(IPS_ASSURED_BIT, &ct->status)) | |
167 | if (seq_printf(s, "[ASSURED] ")) | |
ea781f19 | 168 | goto release; |
e4bd8bce PM |
169 | |
170 | #ifdef CONFIG_NF_CONNTRACK_MARK | |
171 | if (seq_printf(s, "mark=%u ", ct->mark)) | |
ea781f19 | 172 | goto release; |
e4bd8bce PM |
173 | #endif |
174 | ||
1ae4de0c | 175 | if (ct_show_secctx(s, ct)) |
ea781f19 | 176 | goto release; |
e4bd8bce PM |
177 | |
178 | if (seq_printf(s, "use=%u\n", atomic_read(&ct->ct_general.use))) | |
ea781f19 ED |
179 | goto release; |
180 | ret = 0; | |
181 | release: | |
182 | nf_ct_put(ct); | |
183 | return ret; | |
e4bd8bce PM |
184 | } |
185 | ||
56b3d975 | 186 | static const struct seq_operations ct_seq_ops = { |
e4bd8bce PM |
187 | .start = ct_seq_start, |
188 | .next = ct_seq_next, | |
189 | .stop = ct_seq_stop, | |
190 | .show = ct_seq_show | |
191 | }; | |
192 | ||
193 | static int ct_open(struct inode *inode, struct file *file) | |
194 | { | |
5e6b2997 AD |
195 | return seq_open_net(inode, file, &ct_seq_ops, |
196 | sizeof(struct ct_iter_state)); | |
e4bd8bce PM |
197 | } |
198 | ||
9a32144e | 199 | static const struct file_operations ct_file_ops = { |
e4bd8bce PM |
200 | .owner = THIS_MODULE, |
201 | .open = ct_open, | |
202 | .read = seq_read, | |
203 | .llseek = seq_lseek, | |
5e6b2997 | 204 | .release = seq_release_net, |
e4bd8bce PM |
205 | }; |
206 | ||
207 | /* expects */ | |
5d08ad44 | 208 | struct ct_expect_iter_state { |
5e6b2997 | 209 | struct seq_net_private p; |
5d08ad44 PM |
210 | unsigned int bucket; |
211 | }; | |
212 | ||
213 | static struct hlist_node *ct_expect_get_first(struct seq_file *seq) | |
e4bd8bce | 214 | { |
5e6b2997 | 215 | struct net *net = seq_file_net(seq); |
5d08ad44 | 216 | struct ct_expect_iter_state *st = seq->private; |
7d0742da | 217 | struct hlist_node *n; |
e4bd8bce | 218 | |
5d08ad44 | 219 | for (st->bucket = 0; st->bucket < nf_ct_expect_hsize; st->bucket++) { |
9b03f38d | 220 | n = rcu_dereference(net->ct.expect_hash[st->bucket].first); |
7d0742da PM |
221 | if (n) |
222 | return n; | |
5d08ad44 PM |
223 | } |
224 | return NULL; | |
225 | } | |
e4bd8bce | 226 | |
5d08ad44 PM |
227 | static struct hlist_node *ct_expect_get_next(struct seq_file *seq, |
228 | struct hlist_node *head) | |
229 | { | |
5e6b2997 | 230 | struct net *net = seq_file_net(seq); |
5d08ad44 | 231 | struct ct_expect_iter_state *st = seq->private; |
e4bd8bce | 232 | |
7d0742da | 233 | head = rcu_dereference(head->next); |
5d08ad44 PM |
234 | while (head == NULL) { |
235 | if (++st->bucket >= nf_ct_expect_hsize) | |
e4bd8bce | 236 | return NULL; |
9b03f38d | 237 | head = rcu_dereference(net->ct.expect_hash[st->bucket].first); |
e4bd8bce | 238 | } |
5d08ad44 | 239 | return head; |
e4bd8bce PM |
240 | } |
241 | ||
5d08ad44 | 242 | static struct hlist_node *ct_expect_get_idx(struct seq_file *seq, loff_t pos) |
e4bd8bce | 243 | { |
5d08ad44 | 244 | struct hlist_node *head = ct_expect_get_first(seq); |
e4bd8bce | 245 | |
5d08ad44 PM |
246 | if (head) |
247 | while (pos && (head = ct_expect_get_next(seq, head))) | |
248 | pos--; | |
249 | return pos ? NULL : head; | |
250 | } | |
e4bd8bce | 251 | |
5d08ad44 | 252 | static void *exp_seq_start(struct seq_file *seq, loff_t *pos) |
76507f69 | 253 | __acquires(RCU) |
5d08ad44 | 254 | { |
7d0742da | 255 | rcu_read_lock(); |
5d08ad44 PM |
256 | return ct_expect_get_idx(seq, *pos); |
257 | } | |
e4bd8bce | 258 | |
5d08ad44 PM |
259 | static void *exp_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
260 | { | |
261 | (*pos)++; | |
262 | return ct_expect_get_next(seq, v); | |
e4bd8bce PM |
263 | } |
264 | ||
5d08ad44 | 265 | static void exp_seq_stop(struct seq_file *seq, void *v) |
76507f69 | 266 | __releases(RCU) |
e4bd8bce | 267 | { |
7d0742da | 268 | rcu_read_unlock(); |
e4bd8bce PM |
269 | } |
270 | ||
271 | static int exp_seq_show(struct seq_file *s, void *v) | |
272 | { | |
5d08ad44 | 273 | struct nf_conntrack_expect *exp; |
32948588 | 274 | const struct hlist_node *n = v; |
5d08ad44 PM |
275 | |
276 | exp = hlist_entry(n, struct nf_conntrack_expect, hnode); | |
e4bd8bce PM |
277 | |
278 | if (exp->tuple.src.l3num != AF_INET) | |
279 | return 0; | |
280 | ||
281 | if (exp->timeout.function) | |
282 | seq_printf(s, "%ld ", timer_pending(&exp->timeout) | |
283 | ? (long)(exp->timeout.expires - jiffies)/HZ : 0); | |
284 | else | |
285 | seq_printf(s, "- "); | |
286 | ||
287 | seq_printf(s, "proto=%u ", exp->tuple.dst.protonum); | |
288 | ||
289 | print_tuple(s, &exp->tuple, | |
290 | __nf_ct_l3proto_find(exp->tuple.src.l3num), | |
291 | __nf_ct_l4proto_find(exp->tuple.src.l3num, | |
e905a9ed | 292 | exp->tuple.dst.protonum)); |
e4bd8bce PM |
293 | return seq_putc(s, '\n'); |
294 | } | |
295 | ||
56b3d975 | 296 | static const struct seq_operations exp_seq_ops = { |
e4bd8bce PM |
297 | .start = exp_seq_start, |
298 | .next = exp_seq_next, | |
299 | .stop = exp_seq_stop, | |
300 | .show = exp_seq_show | |
301 | }; | |
302 | ||
303 | static int exp_open(struct inode *inode, struct file *file) | |
304 | { | |
5e6b2997 AD |
305 | return seq_open_net(inode, file, &exp_seq_ops, |
306 | sizeof(struct ct_expect_iter_state)); | |
e4bd8bce PM |
307 | } |
308 | ||
9a32144e | 309 | static const struct file_operations ip_exp_file_ops = { |
e4bd8bce PM |
310 | .owner = THIS_MODULE, |
311 | .open = exp_open, | |
312 | .read = seq_read, | |
313 | .llseek = seq_lseek, | |
5e6b2997 | 314 | .release = seq_release_net, |
e4bd8bce PM |
315 | }; |
316 | ||
317 | static void *ct_cpu_seq_start(struct seq_file *seq, loff_t *pos) | |
318 | { | |
8e9df801 | 319 | struct net *net = seq_file_net(seq); |
e4bd8bce PM |
320 | int cpu; |
321 | ||
322 | if (*pos == 0) | |
323 | return SEQ_START_TOKEN; | |
324 | ||
0f23174a | 325 | for (cpu = *pos-1; cpu < nr_cpu_ids; ++cpu) { |
e4bd8bce PM |
326 | if (!cpu_possible(cpu)) |
327 | continue; | |
328 | *pos = cpu+1; | |
8e9df801 | 329 | return per_cpu_ptr(net->ct.stat, cpu); |
e4bd8bce PM |
330 | } |
331 | ||
332 | return NULL; | |
333 | } | |
334 | ||
335 | static void *ct_cpu_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
336 | { | |
8e9df801 | 337 | struct net *net = seq_file_net(seq); |
e4bd8bce PM |
338 | int cpu; |
339 | ||
0f23174a | 340 | for (cpu = *pos; cpu < nr_cpu_ids; ++cpu) { |
e4bd8bce PM |
341 | if (!cpu_possible(cpu)) |
342 | continue; | |
343 | *pos = cpu+1; | |
8e9df801 | 344 | return per_cpu_ptr(net->ct.stat, cpu); |
e4bd8bce PM |
345 | } |
346 | ||
347 | return NULL; | |
348 | } | |
349 | ||
350 | static void ct_cpu_seq_stop(struct seq_file *seq, void *v) | |
351 | { | |
352 | } | |
353 | ||
354 | static int ct_cpu_seq_show(struct seq_file *seq, void *v) | |
355 | { | |
8e9df801 AD |
356 | struct net *net = seq_file_net(seq); |
357 | unsigned int nr_conntracks = atomic_read(&net->ct.count); | |
32948588 | 358 | const struct ip_conntrack_stat *st = v; |
e4bd8bce PM |
359 | |
360 | if (v == SEQ_START_TOKEN) { | |
af740b2c | 361 | 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 search_restart\n"); |
e4bd8bce PM |
362 | return 0; |
363 | } | |
364 | ||
365 | seq_printf(seq, "%08x %08x %08x %08x %08x %08x %08x %08x " | |
af740b2c | 366 | "%08x %08x %08x %08x %08x %08x %08x %08x %08x\n", |
e4bd8bce PM |
367 | nr_conntracks, |
368 | st->searched, | |
369 | st->found, | |
370 | st->new, | |
371 | st->invalid, | |
372 | st->ignore, | |
373 | st->delete, | |
374 | st->delete_list, | |
375 | st->insert, | |
376 | st->insert_failed, | |
377 | st->drop, | |
378 | st->early_drop, | |
379 | st->error, | |
380 | ||
381 | st->expect_new, | |
382 | st->expect_create, | |
af740b2c JDB |
383 | st->expect_delete, |
384 | st->search_restart | |
e4bd8bce PM |
385 | ); |
386 | return 0; | |
387 | } | |
388 | ||
56b3d975 | 389 | static const struct seq_operations ct_cpu_seq_ops = { |
e4bd8bce PM |
390 | .start = ct_cpu_seq_start, |
391 | .next = ct_cpu_seq_next, | |
392 | .stop = ct_cpu_seq_stop, | |
393 | .show = ct_cpu_seq_show, | |
394 | }; | |
395 | ||
396 | static int ct_cpu_seq_open(struct inode *inode, struct file *file) | |
397 | { | |
8e9df801 AD |
398 | return seq_open_net(inode, file, &ct_cpu_seq_ops, |
399 | sizeof(struct seq_net_private)); | |
e4bd8bce PM |
400 | } |
401 | ||
9a32144e | 402 | static const struct file_operations ct_cpu_seq_fops = { |
e4bd8bce PM |
403 | .owner = THIS_MODULE, |
404 | .open = ct_cpu_seq_open, | |
405 | .read = seq_read, | |
406 | .llseek = seq_lseek, | |
8e9df801 | 407 | .release = seq_release_net, |
e4bd8bce PM |
408 | }; |
409 | ||
5e6b2997 | 410 | static int __net_init ip_conntrack_net_init(struct net *net) |
e4bd8bce PM |
411 | { |
412 | struct proc_dir_entry *proc, *proc_exp, *proc_stat; | |
413 | ||
5e6b2997 | 414 | proc = proc_net_fops_create(net, "ip_conntrack", 0440, &ct_file_ops); |
e4bd8bce PM |
415 | if (!proc) |
416 | goto err1; | |
417 | ||
5e6b2997 | 418 | proc_exp = proc_net_fops_create(net, "ip_conntrack_expect", 0440, |
e4bd8bce PM |
419 | &ip_exp_file_ops); |
420 | if (!proc_exp) | |
421 | goto err2; | |
422 | ||
8eeee8b1 | 423 | proc_stat = proc_create("ip_conntrack", S_IRUGO, |
5e6b2997 | 424 | net->proc_net_stat, &ct_cpu_seq_fops); |
e4bd8bce PM |
425 | if (!proc_stat) |
426 | goto err3; | |
e4bd8bce PM |
427 | return 0; |
428 | ||
429 | err3: | |
5e6b2997 | 430 | proc_net_remove(net, "ip_conntrack_expect"); |
e4bd8bce | 431 | err2: |
5e6b2997 | 432 | proc_net_remove(net, "ip_conntrack"); |
e4bd8bce PM |
433 | err1: |
434 | return -ENOMEM; | |
435 | } | |
436 | ||
5e6b2997 AD |
437 | static void __net_exit ip_conntrack_net_exit(struct net *net) |
438 | { | |
439 | remove_proc_entry("ip_conntrack", net->proc_net_stat); | |
440 | proc_net_remove(net, "ip_conntrack_expect"); | |
441 | proc_net_remove(net, "ip_conntrack"); | |
442 | } | |
443 | ||
444 | static struct pernet_operations ip_conntrack_net_ops = { | |
445 | .init = ip_conntrack_net_init, | |
446 | .exit = ip_conntrack_net_exit, | |
447 | }; | |
448 | ||
449 | int __init nf_conntrack_ipv4_compat_init(void) | |
450 | { | |
451 | return register_pernet_subsys(&ip_conntrack_net_ops); | |
452 | } | |
453 | ||
e4bd8bce PM |
454 | void __exit nf_conntrack_ipv4_compat_fini(void) |
455 | { | |
5e6b2997 | 456 | unregister_pernet_subsys(&ip_conntrack_net_ops); |
e4bd8bce | 457 | } |