1 /* ip_conntrack proc compat - based on ip_conntrack_standalone.c
3 * (C) 1999-2001 Paul `Rusty' Russell
4 * (C) 2002-2006 Netfilter Core Team <coreteam@netfilter.org>
5 * (C) 2006-2010 Patrick McHardy <kaber@trash.net>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
11 #include <linux/types.h>
12 #include <linux/proc_fs.h>
13 #include <linux/seq_file.h>
14 #include <linux/percpu.h>
15 #include <linux/security.h>
16 #include <net/net_namespace.h>
18 #include <linux/netfilter.h>
19 #include <net/netfilter/nf_conntrack_core.h>
20 #include <net/netfilter/nf_conntrack_l3proto.h>
21 #include <net/netfilter/nf_conntrack_l4proto.h>
22 #include <net/netfilter/nf_conntrack_expect.h>
23 #include <net/netfilter/nf_conntrack_acct.h>
24 #include <linux/rculist_nulls.h>
25 #include <linux/export.h>
27 struct ct_iter_state {
28 struct seq_net_private p;
29 struct hlist_nulls_head *hash;
30 unsigned int htable_size;
34 static struct hlist_nulls_node *ct_get_first(struct seq_file *seq)
36 struct ct_iter_state *st = seq->private;
37 struct hlist_nulls_node *n;
40 st->bucket < st->htable_size;
43 hlist_nulls_first_rcu(&st->hash[st->bucket]));
50 static struct hlist_nulls_node *ct_get_next(struct seq_file *seq,
51 struct hlist_nulls_node *head)
53 struct ct_iter_state *st = seq->private;
55 head = rcu_dereference(hlist_nulls_next_rcu(head));
56 while (is_a_nulls(head)) {
57 if (likely(get_nulls_value(head) == st->bucket)) {
58 if (++st->bucket >= st->htable_size)
61 head = rcu_dereference(
62 hlist_nulls_first_rcu(&st->hash[st->bucket]));
67 static struct hlist_nulls_node *ct_get_idx(struct seq_file *seq, loff_t pos)
69 struct hlist_nulls_node *head = ct_get_first(seq);
72 while (pos && (head = ct_get_next(seq, head)))
74 return pos ? NULL : head;
77 static void *ct_seq_start(struct seq_file *seq, loff_t *pos)
80 struct ct_iter_state *st = seq->private;
84 nf_conntrack_get_ht(&st->hash, &st->htable_size);
85 return ct_get_idx(seq, *pos);
88 static void *ct_seq_next(struct seq_file *s, void *v, loff_t *pos)
91 return ct_get_next(s, v);
94 static void ct_seq_stop(struct seq_file *s, void *v)
100 #ifdef CONFIG_NF_CONNTRACK_SECMARK
101 static void ct_show_secctx(struct seq_file *s, const struct nf_conn *ct)
107 ret = security_secid_to_secctx(ct->secmark, &secctx, &len);
111 seq_printf(s, "secctx=%s ", secctx);
113 security_release_secctx(secctx, len);
116 static inline void ct_show_secctx(struct seq_file *s, const struct nf_conn *ct)
121 static bool ct_seq_should_skip(const struct nf_conn *ct,
122 const struct net *net,
123 const struct nf_conntrack_tuple_hash *hash)
125 /* we only want to print DIR_ORIGINAL */
126 if (NF_CT_DIRECTION(hash))
129 if (nf_ct_l3num(ct) != AF_INET)
132 if (!net_eq(nf_ct_net(ct), net))
138 static int ct_seq_show(struct seq_file *s, void *v)
140 struct nf_conntrack_tuple_hash *hash = v;
141 struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(hash);
142 const struct nf_conntrack_l3proto *l3proto;
143 const struct nf_conntrack_l4proto *l4proto;
147 if (ct_seq_should_skip(ct, seq_file_net(s), hash))
150 if (unlikely(!atomic_inc_not_zero(&ct->ct_general.use)))
153 /* check if we raced w. object reuse */
154 if (!nf_ct_is_confirmed(ct) ||
155 ct_seq_should_skip(ct, seq_file_net(s), hash))
158 l3proto = __nf_ct_l3proto_find(nf_ct_l3num(ct));
159 NF_CT_ASSERT(l3proto);
160 l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct));
161 NF_CT_ASSERT(l4proto);
164 seq_printf(s, "%-8s %u %ld ",
165 l4proto->name, nf_ct_protonum(ct),
166 timer_pending(&ct->timeout)
167 ? (long)(ct->timeout.expires - jiffies)/HZ : 0);
169 if (l4proto->print_conntrack)
170 l4proto->print_conntrack(s, ct);
172 if (seq_has_overflowed(s))
175 print_tuple(s, &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
178 if (seq_has_overflowed(s))
181 if (seq_print_acct(s, ct, IP_CT_DIR_ORIGINAL))
184 if (!(test_bit(IPS_SEEN_REPLY_BIT, &ct->status)))
185 seq_printf(s, "[UNREPLIED] ");
187 print_tuple(s, &ct->tuplehash[IP_CT_DIR_REPLY].tuple,
190 if (seq_has_overflowed(s))
193 if (seq_print_acct(s, ct, IP_CT_DIR_REPLY))
196 if (test_bit(IPS_ASSURED_BIT, &ct->status))
197 seq_printf(s, "[ASSURED] ");
199 #ifdef CONFIG_NF_CONNTRACK_MARK
200 seq_printf(s, "mark=%u ", ct->mark);
203 ct_show_secctx(s, ct);
205 seq_printf(s, "use=%u\n", atomic_read(&ct->ct_general.use));
207 if (seq_has_overflowed(s))
216 static const struct seq_operations ct_seq_ops = {
217 .start = ct_seq_start,
223 static int ct_open(struct inode *inode, struct file *file)
225 return seq_open_net(inode, file, &ct_seq_ops,
226 sizeof(struct ct_iter_state));
229 static const struct file_operations ct_file_ops = {
230 .owner = THIS_MODULE,
234 .release = seq_release_net,
238 struct ct_expect_iter_state {
239 struct seq_net_private p;
243 static struct hlist_node *ct_expect_get_first(struct seq_file *seq)
245 struct ct_expect_iter_state *st = seq->private;
246 struct hlist_node *n;
248 for (st->bucket = 0; st->bucket < nf_ct_expect_hsize; st->bucket++) {
250 hlist_first_rcu(&nf_ct_expect_hash[st->bucket]));
257 static struct hlist_node *ct_expect_get_next(struct seq_file *seq,
258 struct hlist_node *head)
260 struct ct_expect_iter_state *st = seq->private;
262 head = rcu_dereference(hlist_next_rcu(head));
263 while (head == NULL) {
264 if (++st->bucket >= nf_ct_expect_hsize)
266 head = rcu_dereference(
267 hlist_first_rcu(&nf_ct_expect_hash[st->bucket]));
272 static struct hlist_node *ct_expect_get_idx(struct seq_file *seq, loff_t pos)
274 struct hlist_node *head = ct_expect_get_first(seq);
277 while (pos && (head = ct_expect_get_next(seq, head)))
279 return pos ? NULL : head;
282 static void *exp_seq_start(struct seq_file *seq, loff_t *pos)
286 return ct_expect_get_idx(seq, *pos);
289 static void *exp_seq_next(struct seq_file *seq, void *v, loff_t *pos)
292 return ct_expect_get_next(seq, v);
295 static void exp_seq_stop(struct seq_file *seq, void *v)
301 static int exp_seq_show(struct seq_file *s, void *v)
303 struct nf_conntrack_expect *exp;
304 const struct hlist_node *n = v;
306 exp = hlist_entry(n, struct nf_conntrack_expect, hnode);
308 if (!net_eq(nf_ct_net(exp->master), seq_file_net(s)))
311 if (exp->tuple.src.l3num != AF_INET)
314 if (exp->timeout.function)
315 seq_printf(s, "%ld ", timer_pending(&exp->timeout)
316 ? (long)(exp->timeout.expires - jiffies)/HZ : 0);
320 seq_printf(s, "proto=%u ", exp->tuple.dst.protonum);
322 print_tuple(s, &exp->tuple,
323 __nf_ct_l3proto_find(exp->tuple.src.l3num),
324 __nf_ct_l4proto_find(exp->tuple.src.l3num,
325 exp->tuple.dst.protonum));
331 static const struct seq_operations exp_seq_ops = {
332 .start = exp_seq_start,
333 .next = exp_seq_next,
334 .stop = exp_seq_stop,
338 static int exp_open(struct inode *inode, struct file *file)
340 return seq_open_net(inode, file, &exp_seq_ops,
341 sizeof(struct ct_expect_iter_state));
344 static const struct file_operations ip_exp_file_ops = {
345 .owner = THIS_MODULE,
349 .release = seq_release_net,
352 static void *ct_cpu_seq_start(struct seq_file *seq, loff_t *pos)
354 struct net *net = seq_file_net(seq);
358 return SEQ_START_TOKEN;
360 for (cpu = *pos-1; cpu < nr_cpu_ids; ++cpu) {
361 if (!cpu_possible(cpu))
364 return per_cpu_ptr(net->ct.stat, cpu);
370 static void *ct_cpu_seq_next(struct seq_file *seq, void *v, loff_t *pos)
372 struct net *net = seq_file_net(seq);
375 for (cpu = *pos; cpu < nr_cpu_ids; ++cpu) {
376 if (!cpu_possible(cpu))
379 return per_cpu_ptr(net->ct.stat, cpu);
385 static void ct_cpu_seq_stop(struct seq_file *seq, void *v)
389 static int ct_cpu_seq_show(struct seq_file *seq, void *v)
391 struct net *net = seq_file_net(seq);
392 unsigned int nr_conntracks = atomic_read(&net->ct.count);
393 const struct ip_conntrack_stat *st = v;
395 if (v == SEQ_START_TOKEN) {
396 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");
400 seq_printf(seq, "%08x %08x %08x %08x %08x %08x %08x %08x "
401 "%08x %08x %08x %08x %08x %08x %08x %08x %08x\n",
424 static const struct seq_operations ct_cpu_seq_ops = {
425 .start = ct_cpu_seq_start,
426 .next = ct_cpu_seq_next,
427 .stop = ct_cpu_seq_stop,
428 .show = ct_cpu_seq_show,
431 static int ct_cpu_seq_open(struct inode *inode, struct file *file)
433 return seq_open_net(inode, file, &ct_cpu_seq_ops,
434 sizeof(struct seq_net_private));
437 static const struct file_operations ct_cpu_seq_fops = {
438 .owner = THIS_MODULE,
439 .open = ct_cpu_seq_open,
442 .release = seq_release_net,
445 static int __net_init ip_conntrack_net_init(struct net *net)
447 struct proc_dir_entry *proc, *proc_exp, *proc_stat;
449 proc = proc_create("ip_conntrack", 0440, net->proc_net, &ct_file_ops);
453 proc_exp = proc_create("ip_conntrack_expect", 0440, net->proc_net,
458 proc_stat = proc_create("ip_conntrack", S_IRUGO,
459 net->proc_net_stat, &ct_cpu_seq_fops);
465 remove_proc_entry("ip_conntrack_expect", net->proc_net);
467 remove_proc_entry("ip_conntrack", net->proc_net);
472 static void __net_exit ip_conntrack_net_exit(struct net *net)
474 remove_proc_entry("ip_conntrack", net->proc_net_stat);
475 remove_proc_entry("ip_conntrack_expect", net->proc_net);
476 remove_proc_entry("ip_conntrack", net->proc_net);
479 static struct pernet_operations ip_conntrack_net_ops = {
480 .init = ip_conntrack_net_init,
481 .exit = ip_conntrack_net_exit,
484 int __init nf_conntrack_ipv4_compat_init(void)
486 return register_pernet_subsys(&ip_conntrack_net_ops);
489 void __exit nf_conntrack_ipv4_compat_fini(void)
491 unregister_pernet_subsys(&ip_conntrack_net_ops);