Commit | Line | Data |
---|---|---|
9fb9cbb1 YK |
1 | /* (C) 1999-2001 Paul `Rusty' Russell |
2 | * (C) 2002-2004 Netfilter Core Team <coreteam@netfilter.org> | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License version 2 as | |
6 | * published by the Free Software Foundation. | |
9fb9cbb1 YK |
7 | */ |
8 | ||
9fb9cbb1 YK |
9 | #include <linux/types.h> |
10 | #include <linux/netfilter.h> | |
5a0e3ad6 | 11 | #include <linux/slab.h> |
9fb9cbb1 YK |
12 | #include <linux/module.h> |
13 | #include <linux/skbuff.h> | |
14 | #include <linux/proc_fs.h> | |
15 | #include <linux/seq_file.h> | |
16 | #include <linux/percpu.h> | |
17 | #include <linux/netdevice.h> | |
1ae4de0c | 18 | #include <linux/security.h> |
457c4cbc | 19 | #include <net/net_namespace.h> |
9fb9cbb1 YK |
20 | #ifdef CONFIG_SYSCTL |
21 | #include <linux/sysctl.h> | |
22 | #endif | |
23 | ||
9fb9cbb1 | 24 | #include <net/netfilter/nf_conntrack.h> |
f6180121 | 25 | #include <net/netfilter/nf_conntrack_core.h> |
9fb9cbb1 | 26 | #include <net/netfilter/nf_conntrack_l3proto.h> |
605dcad6 | 27 | #include <net/netfilter/nf_conntrack_l4proto.h> |
77ab9cff | 28 | #include <net/netfilter/nf_conntrack_expect.h> |
9fb9cbb1 | 29 | #include <net/netfilter/nf_conntrack_helper.h> |
58401572 | 30 | #include <net/netfilter/nf_conntrack_acct.h> |
5d0aa2cc | 31 | #include <net/netfilter/nf_conntrack_zones.h> |
0e60ebe0 | 32 | #include <linux/rculist_nulls.h> |
9fb9cbb1 | 33 | |
9fb9cbb1 YK |
34 | MODULE_LICENSE("GPL"); |
35 | ||
9fb9cbb1 | 36 | #ifdef CONFIG_PROC_FS |
77ab9cff | 37 | int |
9fb9cbb1 | 38 | print_tuple(struct seq_file *s, const struct nf_conntrack_tuple *tuple, |
32948588 JE |
39 | const struct nf_conntrack_l3proto *l3proto, |
40 | const struct nf_conntrack_l4proto *l4proto) | |
9fb9cbb1 | 41 | { |
605dcad6 | 42 | return l3proto->print_tuple(s, tuple) || l4proto->print_tuple(s, tuple); |
9fb9cbb1 | 43 | } |
e4bd8bce | 44 | EXPORT_SYMBOL_GPL(print_tuple); |
9fb9cbb1 | 45 | |
9fb9cbb1 | 46 | struct ct_iter_state { |
b2ce2c74 | 47 | struct seq_net_private p; |
9fb9cbb1 YK |
48 | unsigned int bucket; |
49 | }; | |
50 | ||
ea781f19 | 51 | static struct hlist_nulls_node *ct_get_first(struct seq_file *seq) |
9fb9cbb1 | 52 | { |
b2ce2c74 | 53 | struct net *net = seq_file_net(seq); |
9fb9cbb1 | 54 | struct ct_iter_state *st = seq->private; |
ea781f19 | 55 | struct hlist_nulls_node *n; |
9fb9cbb1 YK |
56 | |
57 | for (st->bucket = 0; | |
d696c7bd | 58 | st->bucket < net->ct.htable_size; |
9fb9cbb1 | 59 | st->bucket++) { |
0e60ebe0 | 60 | n = rcu_dereference(hlist_nulls_first_rcu(&net->ct.hash[st->bucket])); |
ea781f19 | 61 | if (!is_a_nulls(n)) |
76507f69 | 62 | return n; |
9fb9cbb1 YK |
63 | } |
64 | return NULL; | |
65 | } | |
66 | ||
ea781f19 ED |
67 | static struct hlist_nulls_node *ct_get_next(struct seq_file *seq, |
68 | struct hlist_nulls_node *head) | |
9fb9cbb1 | 69 | { |
b2ce2c74 | 70 | struct net *net = seq_file_net(seq); |
9fb9cbb1 YK |
71 | struct ct_iter_state *st = seq->private; |
72 | ||
0e60ebe0 | 73 | head = rcu_dereference(hlist_nulls_next_rcu(head)); |
ea781f19 ED |
74 | while (is_a_nulls(head)) { |
75 | if (likely(get_nulls_value(head) == st->bucket)) { | |
d696c7bd | 76 | if (++st->bucket >= net->ct.htable_size) |
ea781f19 ED |
77 | return NULL; |
78 | } | |
0e60ebe0 ED |
79 | head = rcu_dereference( |
80 | hlist_nulls_first_rcu( | |
81 | &net->ct.hash[st->bucket])); | |
9fb9cbb1 YK |
82 | } |
83 | return head; | |
84 | } | |
85 | ||
ea781f19 | 86 | static struct hlist_nulls_node *ct_get_idx(struct seq_file *seq, loff_t pos) |
9fb9cbb1 | 87 | { |
ea781f19 | 88 | struct hlist_nulls_node *head = ct_get_first(seq); |
9fb9cbb1 YK |
89 | |
90 | if (head) | |
91 | while (pos && (head = ct_get_next(seq, head))) | |
92 | pos--; | |
93 | return pos ? NULL : head; | |
94 | } | |
95 | ||
96 | static void *ct_seq_start(struct seq_file *seq, loff_t *pos) | |
76507f69 | 97 | __acquires(RCU) |
9fb9cbb1 | 98 | { |
76507f69 | 99 | rcu_read_lock(); |
9fb9cbb1 YK |
100 | return ct_get_idx(seq, *pos); |
101 | } | |
102 | ||
103 | static void *ct_seq_next(struct seq_file *s, void *v, loff_t *pos) | |
104 | { | |
105 | (*pos)++; | |
106 | return ct_get_next(s, v); | |
107 | } | |
108 | ||
109 | static void ct_seq_stop(struct seq_file *s, void *v) | |
76507f69 | 110 | __releases(RCU) |
9fb9cbb1 | 111 | { |
76507f69 | 112 | rcu_read_unlock(); |
9fb9cbb1 YK |
113 | } |
114 | ||
1ae4de0c EP |
115 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
116 | static int ct_show_secctx(struct seq_file *s, const struct nf_conn *ct) | |
117 | { | |
118 | int ret; | |
119 | u32 len; | |
120 | char *secctx; | |
121 | ||
122 | ret = security_secid_to_secctx(ct->secmark, &secctx, &len); | |
123 | if (ret) | |
cba85b53 | 124 | return 0; |
1ae4de0c EP |
125 | |
126 | ret = seq_printf(s, "secctx=%s ", secctx); | |
127 | ||
128 | security_release_secctx(secctx, len); | |
129 | return ret; | |
130 | } | |
131 | #else | |
132 | static inline int ct_show_secctx(struct seq_file *s, const struct nf_conn *ct) | |
133 | { | |
134 | return 0; | |
135 | } | |
136 | #endif | |
137 | ||
9fb9cbb1 YK |
138 | /* return 0 on success, 1 in case of error */ |
139 | static int ct_seq_show(struct seq_file *s, void *v) | |
140 | { | |
ea781f19 ED |
141 | struct nf_conntrack_tuple_hash *hash = v; |
142 | struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(hash); | |
32948588 JE |
143 | const struct nf_conntrack_l3proto *l3proto; |
144 | const struct nf_conntrack_l4proto *l4proto; | |
ea781f19 | 145 | int ret = 0; |
9fb9cbb1 | 146 | |
c88130bc | 147 | NF_CT_ASSERT(ct); |
ea781f19 ED |
148 | if (unlikely(!atomic_inc_not_zero(&ct->ct_general.use))) |
149 | return 0; | |
9fb9cbb1 YK |
150 | |
151 | /* we only want to print DIR_ORIGINAL */ | |
152 | if (NF_CT_DIRECTION(hash)) | |
ea781f19 | 153 | goto release; |
9fb9cbb1 | 154 | |
5e8fbe2a | 155 | l3proto = __nf_ct_l3proto_find(nf_ct_l3num(ct)); |
9fb9cbb1 | 156 | NF_CT_ASSERT(l3proto); |
5e8fbe2a | 157 | l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct)); |
605dcad6 | 158 | NF_CT_ASSERT(l4proto); |
9fb9cbb1 | 159 | |
ea781f19 | 160 | ret = -ENOSPC; |
9fb9cbb1 | 161 | if (seq_printf(s, "%-8s %u %-8s %u %ld ", |
5e8fbe2a PM |
162 | l3proto->name, nf_ct_l3num(ct), |
163 | l4proto->name, nf_ct_protonum(ct), | |
c88130bc PM |
164 | timer_pending(&ct->timeout) |
165 | ? (long)(ct->timeout.expires - jiffies)/HZ : 0) != 0) | |
ea781f19 | 166 | goto release; |
9fb9cbb1 | 167 | |
c88130bc | 168 | if (l4proto->print_conntrack && l4proto->print_conntrack(s, ct)) |
ea781f19 | 169 | goto release; |
9fb9cbb1 | 170 | |
c88130bc | 171 | if (print_tuple(s, &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple, |
605dcad6 | 172 | l3proto, l4proto)) |
ea781f19 | 173 | goto release; |
9fb9cbb1 | 174 | |
58401572 | 175 | if (seq_print_acct(s, ct, IP_CT_DIR_ORIGINAL)) |
ea781f19 | 176 | goto release; |
9fb9cbb1 | 177 | |
c88130bc | 178 | if (!(test_bit(IPS_SEEN_REPLY_BIT, &ct->status))) |
9fb9cbb1 | 179 | if (seq_printf(s, "[UNREPLIED] ")) |
ea781f19 | 180 | goto release; |
9fb9cbb1 | 181 | |
c88130bc | 182 | if (print_tuple(s, &ct->tuplehash[IP_CT_DIR_REPLY].tuple, |
605dcad6 | 183 | l3proto, l4proto)) |
ea781f19 | 184 | goto release; |
9fb9cbb1 | 185 | |
58401572 | 186 | if (seq_print_acct(s, ct, IP_CT_DIR_REPLY)) |
ea781f19 | 187 | goto release; |
9fb9cbb1 | 188 | |
c88130bc | 189 | if (test_bit(IPS_ASSURED_BIT, &ct->status)) |
9fb9cbb1 | 190 | if (seq_printf(s, "[ASSURED] ")) |
ea781f19 | 191 | goto release; |
9fb9cbb1 YK |
192 | |
193 | #if defined(CONFIG_NF_CONNTRACK_MARK) | |
c88130bc | 194 | if (seq_printf(s, "mark=%u ", ct->mark)) |
ea781f19 | 195 | goto release; |
9fb9cbb1 YK |
196 | #endif |
197 | ||
1ae4de0c | 198 | if (ct_show_secctx(s, ct)) |
ea781f19 | 199 | goto release; |
7c9728c3 | 200 | |
5d0aa2cc PM |
201 | #ifdef CONFIG_NF_CONNTRACK_ZONES |
202 | if (seq_printf(s, "zone=%u ", nf_ct_zone(ct))) | |
203 | goto release; | |
204 | #endif | |
205 | ||
c88130bc | 206 | if (seq_printf(s, "use=%u\n", atomic_read(&ct->ct_general.use))) |
ea781f19 | 207 | goto release; |
a5d29264 | 208 | |
ea781f19 ED |
209 | ret = 0; |
210 | release: | |
211 | nf_ct_put(ct); | |
9fb9cbb1 YK |
212 | return 0; |
213 | } | |
214 | ||
56b3d975 | 215 | static const struct seq_operations ct_seq_ops = { |
9fb9cbb1 YK |
216 | .start = ct_seq_start, |
217 | .next = ct_seq_next, | |
218 | .stop = ct_seq_stop, | |
219 | .show = ct_seq_show | |
220 | }; | |
221 | ||
222 | static int ct_open(struct inode *inode, struct file *file) | |
223 | { | |
b2ce2c74 | 224 | return seq_open_net(inode, file, &ct_seq_ops, |
e2da5913 | 225 | sizeof(struct ct_iter_state)); |
9fb9cbb1 YK |
226 | } |
227 | ||
da7071d7 | 228 | static const struct file_operations ct_file_ops = { |
9fb9cbb1 YK |
229 | .owner = THIS_MODULE, |
230 | .open = ct_open, | |
231 | .read = seq_read, | |
232 | .llseek = seq_lseek, | |
b2ce2c74 | 233 | .release = seq_release_net, |
9fb9cbb1 YK |
234 | }; |
235 | ||
9fb9cbb1 YK |
236 | static void *ct_cpu_seq_start(struct seq_file *seq, loff_t *pos) |
237 | { | |
8e9df801 | 238 | struct net *net = seq_file_net(seq); |
9fb9cbb1 YK |
239 | int cpu; |
240 | ||
241 | if (*pos == 0) | |
242 | return SEQ_START_TOKEN; | |
243 | ||
0f23174a | 244 | for (cpu = *pos-1; cpu < nr_cpu_ids; ++cpu) { |
9fb9cbb1 YK |
245 | if (!cpu_possible(cpu)) |
246 | continue; | |
247 | *pos = cpu + 1; | |
8e9df801 | 248 | return per_cpu_ptr(net->ct.stat, cpu); |
9fb9cbb1 YK |
249 | } |
250 | ||
251 | return NULL; | |
252 | } | |
253 | ||
254 | static void *ct_cpu_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
255 | { | |
8e9df801 | 256 | struct net *net = seq_file_net(seq); |
9fb9cbb1 YK |
257 | int cpu; |
258 | ||
0f23174a | 259 | for (cpu = *pos; cpu < nr_cpu_ids; ++cpu) { |
9fb9cbb1 YK |
260 | if (!cpu_possible(cpu)) |
261 | continue; | |
262 | *pos = cpu + 1; | |
8e9df801 | 263 | return per_cpu_ptr(net->ct.stat, cpu); |
9fb9cbb1 YK |
264 | } |
265 | ||
266 | return NULL; | |
267 | } | |
268 | ||
269 | static void ct_cpu_seq_stop(struct seq_file *seq, void *v) | |
270 | { | |
271 | } | |
272 | ||
273 | static int ct_cpu_seq_show(struct seq_file *seq, void *v) | |
274 | { | |
8e9df801 AD |
275 | struct net *net = seq_file_net(seq); |
276 | unsigned int nr_conntracks = atomic_read(&net->ct.count); | |
32948588 | 277 | const struct ip_conntrack_stat *st = v; |
9fb9cbb1 YK |
278 | |
279 | if (v == SEQ_START_TOKEN) { | |
af740b2c | 280 | 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"); |
9fb9cbb1 YK |
281 | return 0; |
282 | } | |
283 | ||
284 | seq_printf(seq, "%08x %08x %08x %08x %08x %08x %08x %08x " | |
af740b2c | 285 | "%08x %08x %08x %08x %08x %08x %08x %08x %08x\n", |
9fb9cbb1 YK |
286 | nr_conntracks, |
287 | st->searched, | |
288 | st->found, | |
289 | st->new, | |
290 | st->invalid, | |
291 | st->ignore, | |
292 | st->delete, | |
293 | st->delete_list, | |
294 | st->insert, | |
295 | st->insert_failed, | |
296 | st->drop, | |
297 | st->early_drop, | |
298 | st->error, | |
299 | ||
300 | st->expect_new, | |
301 | st->expect_create, | |
af740b2c JDB |
302 | st->expect_delete, |
303 | st->search_restart | |
9fb9cbb1 YK |
304 | ); |
305 | return 0; | |
306 | } | |
307 | ||
56b3d975 | 308 | static const struct seq_operations ct_cpu_seq_ops = { |
9fb9cbb1 YK |
309 | .start = ct_cpu_seq_start, |
310 | .next = ct_cpu_seq_next, | |
311 | .stop = ct_cpu_seq_stop, | |
312 | .show = ct_cpu_seq_show, | |
313 | }; | |
314 | ||
315 | static int ct_cpu_seq_open(struct inode *inode, struct file *file) | |
316 | { | |
8e9df801 AD |
317 | return seq_open_net(inode, file, &ct_cpu_seq_ops, |
318 | sizeof(struct seq_net_private)); | |
9fb9cbb1 YK |
319 | } |
320 | ||
da7071d7 | 321 | static const struct file_operations ct_cpu_seq_fops = { |
9fb9cbb1 YK |
322 | .owner = THIS_MODULE, |
323 | .open = ct_cpu_seq_open, | |
324 | .read = seq_read, | |
325 | .llseek = seq_lseek, | |
8e9df801 | 326 | .release = seq_release_net, |
9fb9cbb1 | 327 | }; |
b916f7d4 | 328 | |
b2ce2c74 | 329 | static int nf_conntrack_standalone_init_proc(struct net *net) |
b916f7d4 AD |
330 | { |
331 | struct proc_dir_entry *pde; | |
332 | ||
b2ce2c74 | 333 | pde = proc_net_fops_create(net, "nf_conntrack", 0440, &ct_file_ops); |
b916f7d4 AD |
334 | if (!pde) |
335 | goto out_nf_conntrack; | |
52c0e111 | 336 | |
b2ce2c74 | 337 | pde = proc_create("nf_conntrack", S_IRUGO, net->proc_net_stat, |
52c0e111 | 338 | &ct_cpu_seq_fops); |
b916f7d4 AD |
339 | if (!pde) |
340 | goto out_stat_nf_conntrack; | |
b916f7d4 AD |
341 | return 0; |
342 | ||
343 | out_stat_nf_conntrack: | |
b2ce2c74 | 344 | proc_net_remove(net, "nf_conntrack"); |
b916f7d4 AD |
345 | out_nf_conntrack: |
346 | return -ENOMEM; | |
347 | } | |
348 | ||
b2ce2c74 | 349 | static void nf_conntrack_standalone_fini_proc(struct net *net) |
b916f7d4 | 350 | { |
b2ce2c74 AD |
351 | remove_proc_entry("nf_conntrack", net->proc_net_stat); |
352 | proc_net_remove(net, "nf_conntrack"); | |
b916f7d4 AD |
353 | } |
354 | #else | |
b2ce2c74 | 355 | static int nf_conntrack_standalone_init_proc(struct net *net) |
b916f7d4 AD |
356 | { |
357 | return 0; | |
358 | } | |
359 | ||
b2ce2c74 | 360 | static void nf_conntrack_standalone_fini_proc(struct net *net) |
b916f7d4 AD |
361 | { |
362 | } | |
9fb9cbb1 YK |
363 | #endif /* CONFIG_PROC_FS */ |
364 | ||
365 | /* Sysctl support */ | |
366 | ||
367 | #ifdef CONFIG_SYSCTL | |
9fb9cbb1 YK |
368 | /* Log invalid packets of a given protocol */ |
369 | static int log_invalid_proto_min = 0; | |
370 | static int log_invalid_proto_max = 255; | |
371 | ||
9714be7d | 372 | static struct ctl_table_header *nf_ct_netfilter_header; |
9fb9cbb1 YK |
373 | |
374 | static ctl_table nf_ct_sysctl_table[] = { | |
375 | { | |
9fb9cbb1 YK |
376 | .procname = "nf_conntrack_max", |
377 | .data = &nf_conntrack_max, | |
378 | .maxlen = sizeof(int), | |
379 | .mode = 0644, | |
6d9f239a | 380 | .proc_handler = proc_dointvec, |
9fb9cbb1 YK |
381 | }, |
382 | { | |
9fb9cbb1 | 383 | .procname = "nf_conntrack_count", |
49ac8713 | 384 | .data = &init_net.ct.count, |
9fb9cbb1 YK |
385 | .maxlen = sizeof(int), |
386 | .mode = 0444, | |
6d9f239a | 387 | .proc_handler = proc_dointvec, |
9fb9cbb1 YK |
388 | }, |
389 | { | |
9fb9cbb1 | 390 | .procname = "nf_conntrack_buckets", |
d696c7bd | 391 | .data = &init_net.ct.htable_size, |
9fb9cbb1 YK |
392 | .maxlen = sizeof(unsigned int), |
393 | .mode = 0444, | |
6d9f239a | 394 | .proc_handler = proc_dointvec, |
9fb9cbb1 | 395 | }, |
39a27a35 | 396 | { |
39a27a35 | 397 | .procname = "nf_conntrack_checksum", |
c04d0552 | 398 | .data = &init_net.ct.sysctl_checksum, |
39a27a35 PM |
399 | .maxlen = sizeof(unsigned int), |
400 | .mode = 0644, | |
6d9f239a | 401 | .proc_handler = proc_dointvec, |
39a27a35 | 402 | }, |
9fb9cbb1 | 403 | { |
9fb9cbb1 | 404 | .procname = "nf_conntrack_log_invalid", |
c2a2c7e0 | 405 | .data = &init_net.ct.sysctl_log_invalid, |
9fb9cbb1 YK |
406 | .maxlen = sizeof(unsigned int), |
407 | .mode = 0644, | |
6d9f239a | 408 | .proc_handler = proc_dointvec_minmax, |
9fb9cbb1 YK |
409 | .extra1 = &log_invalid_proto_min, |
410 | .extra2 = &log_invalid_proto_max, | |
411 | }, | |
f264a7df | 412 | { |
f264a7df PM |
413 | .procname = "nf_conntrack_expect_max", |
414 | .data = &nf_ct_expect_max, | |
415 | .maxlen = sizeof(int), | |
416 | .mode = 0644, | |
6d9f239a | 417 | .proc_handler = proc_dointvec, |
f264a7df | 418 | }, |
f8572d8f | 419 | { } |
9fb9cbb1 YK |
420 | }; |
421 | ||
422 | #define NET_NF_CONNTRACK_MAX 2089 | |
423 | ||
424 | static ctl_table nf_ct_netfilter_table[] = { | |
9fb9cbb1 | 425 | { |
9fb9cbb1 YK |
426 | .procname = "nf_conntrack_max", |
427 | .data = &nf_conntrack_max, | |
428 | .maxlen = sizeof(int), | |
429 | .mode = 0644, | |
6d9f239a | 430 | .proc_handler = proc_dointvec, |
9fb9cbb1 | 431 | }, |
f8572d8f | 432 | { } |
9fb9cbb1 YK |
433 | }; |
434 | ||
9e232495 | 435 | static struct ctl_path nf_ct_path[] = { |
f8572d8f | 436 | { .procname = "net", }, |
3d7cc2ba | 437 | { } |
9fb9cbb1 | 438 | }; |
3d7cc2ba | 439 | |
80250707 | 440 | static int nf_conntrack_standalone_init_sysctl(struct net *net) |
b916f7d4 | 441 | { |
80250707 AD |
442 | struct ctl_table *table; |
443 | ||
444 | if (net_eq(net, &init_net)) { | |
445 | nf_ct_netfilter_header = | |
446 | register_sysctl_paths(nf_ct_path, nf_ct_netfilter_table); | |
447 | if (!nf_ct_netfilter_header) | |
448 | goto out; | |
449 | } | |
450 | ||
451 | table = kmemdup(nf_ct_sysctl_table, sizeof(nf_ct_sysctl_table), | |
452 | GFP_KERNEL); | |
453 | if (!table) | |
454 | goto out_kmemdup; | |
455 | ||
456 | table[1].data = &net->ct.count; | |
d696c7bd | 457 | table[2].data = &net->ct.htable_size; |
c04d0552 | 458 | table[3].data = &net->ct.sysctl_checksum; |
c2a2c7e0 | 459 | table[4].data = &net->ct.sysctl_log_invalid; |
80250707 AD |
460 | |
461 | net->ct.sysctl_header = register_net_sysctl_table(net, | |
462 | nf_net_netfilter_sysctl_path, table); | |
463 | if (!net->ct.sysctl_header) | |
9714be7d KPO |
464 | goto out_unregister_netfilter; |
465 | ||
b916f7d4 AD |
466 | return 0; |
467 | ||
9714be7d | 468 | out_unregister_netfilter: |
80250707 AD |
469 | kfree(table); |
470 | out_kmemdup: | |
471 | if (net_eq(net, &init_net)) | |
472 | unregister_sysctl_table(nf_ct_netfilter_header); | |
9714be7d | 473 | out: |
654d0fbd | 474 | printk(KERN_ERR "nf_conntrack: can't register to sysctl.\n"); |
9714be7d | 475 | return -ENOMEM; |
b916f7d4 AD |
476 | } |
477 | ||
80250707 | 478 | static void nf_conntrack_standalone_fini_sysctl(struct net *net) |
b916f7d4 | 479 | { |
80250707 AD |
480 | struct ctl_table *table; |
481 | ||
482 | if (net_eq(net, &init_net)) | |
483 | unregister_sysctl_table(nf_ct_netfilter_header); | |
484 | table = net->ct.sysctl_header->ctl_table_arg; | |
485 | unregister_net_sysctl_table(net->ct.sysctl_header); | |
486 | kfree(table); | |
b916f7d4 AD |
487 | } |
488 | #else | |
80250707 | 489 | static int nf_conntrack_standalone_init_sysctl(struct net *net) |
b916f7d4 AD |
490 | { |
491 | return 0; | |
492 | } | |
493 | ||
80250707 | 494 | static void nf_conntrack_standalone_fini_sysctl(struct net *net) |
b916f7d4 AD |
495 | { |
496 | } | |
9fb9cbb1 YK |
497 | #endif /* CONFIG_SYSCTL */ |
498 | ||
dfdb8d79 AD |
499 | static int nf_conntrack_net_init(struct net *net) |
500 | { | |
b2ce2c74 AD |
501 | int ret; |
502 | ||
503 | ret = nf_conntrack_init(net); | |
504 | if (ret < 0) | |
505 | goto out_init; | |
506 | ret = nf_conntrack_standalone_init_proc(net); | |
507 | if (ret < 0) | |
508 | goto out_proc; | |
c04d0552 | 509 | net->ct.sysctl_checksum = 1; |
c2a2c7e0 | 510 | net->ct.sysctl_log_invalid = 0; |
80250707 AD |
511 | ret = nf_conntrack_standalone_init_sysctl(net); |
512 | if (ret < 0) | |
513 | goto out_sysctl; | |
b2ce2c74 AD |
514 | return 0; |
515 | ||
80250707 AD |
516 | out_sysctl: |
517 | nf_conntrack_standalone_fini_proc(net); | |
b2ce2c74 AD |
518 | out_proc: |
519 | nf_conntrack_cleanup(net); | |
520 | out_init: | |
521 | return ret; | |
dfdb8d79 AD |
522 | } |
523 | ||
524 | static void nf_conntrack_net_exit(struct net *net) | |
525 | { | |
80250707 | 526 | nf_conntrack_standalone_fini_sysctl(net); |
b2ce2c74 | 527 | nf_conntrack_standalone_fini_proc(net); |
dfdb8d79 AD |
528 | nf_conntrack_cleanup(net); |
529 | } | |
530 | ||
531 | static struct pernet_operations nf_conntrack_net_ops = { | |
532 | .init = nf_conntrack_net_init, | |
533 | .exit = nf_conntrack_net_exit, | |
534 | }; | |
535 | ||
65b4b4e8 | 536 | static int __init nf_conntrack_standalone_init(void) |
9fb9cbb1 | 537 | { |
80250707 | 538 | return register_pernet_subsys(&nf_conntrack_net_ops); |
9fb9cbb1 YK |
539 | } |
540 | ||
65b4b4e8 | 541 | static void __exit nf_conntrack_standalone_fini(void) |
9fb9cbb1 | 542 | { |
dfdb8d79 | 543 | unregister_pernet_subsys(&nf_conntrack_net_ops); |
9fb9cbb1 YK |
544 | } |
545 | ||
65b4b4e8 AM |
546 | module_init(nf_conntrack_standalone_init); |
547 | module_exit(nf_conntrack_standalone_fini); | |
9fb9cbb1 YK |
548 | |
549 | /* Some modules need us, but don't depend directly on any symbol. | |
550 | They should call this. */ | |
2e4e6a17 | 551 | void need_conntrack(void) |
9fb9cbb1 YK |
552 | { |
553 | } | |
13b18339 | 554 | EXPORT_SYMBOL_GPL(need_conntrack); |