Commit | Line | Data |
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9fb9cbb1 YK |
1 | /* (C) 1999-2001 Paul `Rusty' Russell |
2 | * (C) 2002-2004 Netfilter Core Team <coreteam@netfilter.org> | |
f229f6ce | 3 | * (C) 2005-2012 Patrick McHardy <kaber@trash.net> |
9fb9cbb1 YK |
4 | * |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License version 2 as | |
7 | * published by the Free Software Foundation. | |
9fb9cbb1 YK |
8 | */ |
9 | ||
9fb9cbb1 YK |
10 | #include <linux/types.h> |
11 | #include <linux/netfilter.h> | |
5a0e3ad6 | 12 | #include <linux/slab.h> |
9fb9cbb1 YK |
13 | #include <linux/module.h> |
14 | #include <linux/skbuff.h> | |
15 | #include <linux/proc_fs.h> | |
16 | #include <linux/seq_file.h> | |
17 | #include <linux/percpu.h> | |
18 | #include <linux/netdevice.h> | |
1ae4de0c | 19 | #include <linux/security.h> |
457c4cbc | 20 | #include <net/net_namespace.h> |
9fb9cbb1 YK |
21 | #ifdef CONFIG_SYSCTL |
22 | #include <linux/sysctl.h> | |
23 | #endif | |
24 | ||
9fb9cbb1 | 25 | #include <net/netfilter/nf_conntrack.h> |
f6180121 | 26 | #include <net/netfilter/nf_conntrack_core.h> |
9fb9cbb1 | 27 | #include <net/netfilter/nf_conntrack_l3proto.h> |
605dcad6 | 28 | #include <net/netfilter/nf_conntrack_l4proto.h> |
77ab9cff | 29 | #include <net/netfilter/nf_conntrack_expect.h> |
9fb9cbb1 | 30 | #include <net/netfilter/nf_conntrack_helper.h> |
58401572 | 31 | #include <net/netfilter/nf_conntrack_acct.h> |
5d0aa2cc | 32 | #include <net/netfilter/nf_conntrack_zones.h> |
a992ca2a | 33 | #include <net/netfilter/nf_conntrack_timestamp.h> |
0e60ebe0 | 34 | #include <linux/rculist_nulls.h> |
9fb9cbb1 | 35 | |
9fb9cbb1 YK |
36 | MODULE_LICENSE("GPL"); |
37 | ||
54b07dca | 38 | #ifdef CONFIG_NF_CONNTRACK_PROCFS |
824f1fbe | 39 | void |
9fb9cbb1 | 40 | print_tuple(struct seq_file *s, const struct nf_conntrack_tuple *tuple, |
32948588 JE |
41 | const struct nf_conntrack_l3proto *l3proto, |
42 | const struct nf_conntrack_l4proto *l4proto) | |
9fb9cbb1 | 43 | { |
824f1fbe JP |
44 | l3proto->print_tuple(s, tuple); |
45 | l4proto->print_tuple(s, tuple); | |
9fb9cbb1 | 46 | } |
e4bd8bce | 47 | EXPORT_SYMBOL_GPL(print_tuple); |
9fb9cbb1 | 48 | |
9fb9cbb1 | 49 | struct ct_iter_state { |
b2ce2c74 | 50 | struct seq_net_private p; |
9fb9cbb1 | 51 | unsigned int bucket; |
a992ca2a | 52 | u_int64_t time_now; |
9fb9cbb1 YK |
53 | }; |
54 | ||
ea781f19 | 55 | static struct hlist_nulls_node *ct_get_first(struct seq_file *seq) |
9fb9cbb1 | 56 | { |
b2ce2c74 | 57 | struct net *net = seq_file_net(seq); |
9fb9cbb1 | 58 | struct ct_iter_state *st = seq->private; |
ea781f19 | 59 | struct hlist_nulls_node *n; |
9fb9cbb1 YK |
60 | |
61 | for (st->bucket = 0; | |
d696c7bd | 62 | st->bucket < net->ct.htable_size; |
9fb9cbb1 | 63 | st->bucket++) { |
0e60ebe0 | 64 | n = rcu_dereference(hlist_nulls_first_rcu(&net->ct.hash[st->bucket])); |
ea781f19 | 65 | if (!is_a_nulls(n)) |
76507f69 | 66 | return n; |
9fb9cbb1 YK |
67 | } |
68 | return NULL; | |
69 | } | |
70 | ||
ea781f19 ED |
71 | static struct hlist_nulls_node *ct_get_next(struct seq_file *seq, |
72 | struct hlist_nulls_node *head) | |
9fb9cbb1 | 73 | { |
b2ce2c74 | 74 | struct net *net = seq_file_net(seq); |
9fb9cbb1 YK |
75 | struct ct_iter_state *st = seq->private; |
76 | ||
0e60ebe0 | 77 | head = rcu_dereference(hlist_nulls_next_rcu(head)); |
ea781f19 ED |
78 | while (is_a_nulls(head)) { |
79 | if (likely(get_nulls_value(head) == st->bucket)) { | |
d696c7bd | 80 | if (++st->bucket >= net->ct.htable_size) |
ea781f19 ED |
81 | return NULL; |
82 | } | |
0e60ebe0 ED |
83 | head = rcu_dereference( |
84 | hlist_nulls_first_rcu( | |
85 | &net->ct.hash[st->bucket])); | |
9fb9cbb1 YK |
86 | } |
87 | return head; | |
88 | } | |
89 | ||
ea781f19 | 90 | static struct hlist_nulls_node *ct_get_idx(struct seq_file *seq, loff_t pos) |
9fb9cbb1 | 91 | { |
ea781f19 | 92 | struct hlist_nulls_node *head = ct_get_first(seq); |
9fb9cbb1 YK |
93 | |
94 | if (head) | |
95 | while (pos && (head = ct_get_next(seq, head))) | |
96 | pos--; | |
97 | return pos ? NULL : head; | |
98 | } | |
99 | ||
100 | static void *ct_seq_start(struct seq_file *seq, loff_t *pos) | |
76507f69 | 101 | __acquires(RCU) |
9fb9cbb1 | 102 | { |
a992ca2a PNA |
103 | struct ct_iter_state *st = seq->private; |
104 | ||
d2de875c | 105 | st->time_now = ktime_get_real_ns(); |
76507f69 | 106 | rcu_read_lock(); |
9fb9cbb1 YK |
107 | return ct_get_idx(seq, *pos); |
108 | } | |
109 | ||
110 | static void *ct_seq_next(struct seq_file *s, void *v, loff_t *pos) | |
111 | { | |
112 | (*pos)++; | |
113 | return ct_get_next(s, v); | |
114 | } | |
115 | ||
116 | static void ct_seq_stop(struct seq_file *s, void *v) | |
76507f69 | 117 | __releases(RCU) |
9fb9cbb1 | 118 | { |
76507f69 | 119 | rcu_read_unlock(); |
9fb9cbb1 YK |
120 | } |
121 | ||
1ae4de0c | 122 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
e71456ae | 123 | static void ct_show_secctx(struct seq_file *s, const struct nf_conn *ct) |
1ae4de0c EP |
124 | { |
125 | int ret; | |
126 | u32 len; | |
127 | char *secctx; | |
128 | ||
129 | ret = security_secid_to_secctx(ct->secmark, &secctx, &len); | |
130 | if (ret) | |
e71456ae | 131 | return; |
1ae4de0c | 132 | |
e71456ae | 133 | seq_printf(s, "secctx=%s ", secctx); |
1ae4de0c EP |
134 | |
135 | security_release_secctx(secctx, len); | |
1ae4de0c EP |
136 | } |
137 | #else | |
e71456ae | 138 | static inline void ct_show_secctx(struct seq_file *s, const struct nf_conn *ct) |
1ae4de0c | 139 | { |
1ae4de0c EP |
140 | } |
141 | #endif | |
142 | ||
a992ca2a | 143 | #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP |
e71456ae | 144 | static void ct_show_delta_time(struct seq_file *s, const struct nf_conn *ct) |
a992ca2a | 145 | { |
f5c88f56 | 146 | struct ct_iter_state *st = s->private; |
a992ca2a | 147 | struct nf_conn_tstamp *tstamp; |
f5c88f56 | 148 | s64 delta_time; |
a992ca2a PNA |
149 | |
150 | tstamp = nf_conn_tstamp_find(ct); | |
151 | if (tstamp) { | |
f5c88f56 PM |
152 | delta_time = st->time_now - tstamp->start; |
153 | if (delta_time > 0) | |
154 | delta_time = div_s64(delta_time, NSEC_PER_SEC); | |
155 | else | |
156 | delta_time = 0; | |
157 | ||
e71456ae SRRH |
158 | seq_printf(s, "delta-time=%llu ", |
159 | (unsigned long long)delta_time); | |
a992ca2a | 160 | } |
e71456ae | 161 | return; |
a992ca2a PNA |
162 | } |
163 | #else | |
e71456ae | 164 | static inline void |
a992ca2a PNA |
165 | ct_show_delta_time(struct seq_file *s, const struct nf_conn *ct) |
166 | { | |
a992ca2a PNA |
167 | } |
168 | #endif | |
169 | ||
9fb9cbb1 YK |
170 | /* return 0 on success, 1 in case of error */ |
171 | static int ct_seq_show(struct seq_file *s, void *v) | |
172 | { | |
ea781f19 ED |
173 | struct nf_conntrack_tuple_hash *hash = v; |
174 | struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(hash); | |
32948588 JE |
175 | const struct nf_conntrack_l3proto *l3proto; |
176 | const struct nf_conntrack_l4proto *l4proto; | |
ea781f19 | 177 | int ret = 0; |
9fb9cbb1 | 178 | |
c88130bc | 179 | NF_CT_ASSERT(ct); |
ea781f19 ED |
180 | if (unlikely(!atomic_inc_not_zero(&ct->ct_general.use))) |
181 | return 0; | |
9fb9cbb1 YK |
182 | |
183 | /* we only want to print DIR_ORIGINAL */ | |
184 | if (NF_CT_DIRECTION(hash)) | |
ea781f19 | 185 | goto release; |
9fb9cbb1 | 186 | |
5e8fbe2a | 187 | l3proto = __nf_ct_l3proto_find(nf_ct_l3num(ct)); |
9fb9cbb1 | 188 | NF_CT_ASSERT(l3proto); |
5e8fbe2a | 189 | l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct)); |
605dcad6 | 190 | NF_CT_ASSERT(l4proto); |
9fb9cbb1 | 191 | |
ea781f19 | 192 | ret = -ENOSPC; |
e71456ae SRRH |
193 | seq_printf(s, "%-8s %u %-8s %u %ld ", |
194 | l3proto->name, nf_ct_l3num(ct), | |
195 | l4proto->name, nf_ct_protonum(ct), | |
196 | timer_pending(&ct->timeout) | |
197 | ? (long)(ct->timeout.expires - jiffies)/HZ : 0); | |
9fb9cbb1 | 198 | |
37246a58 SRRH |
199 | if (l4proto->print_conntrack) |
200 | l4proto->print_conntrack(s, ct); | |
9fb9cbb1 | 201 | |
824f1fbe JP |
202 | print_tuple(s, &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple, |
203 | l3proto, l4proto); | |
9fb9cbb1 | 204 | |
e71456ae SRRH |
205 | if (seq_has_overflowed(s)) |
206 | goto release; | |
207 | ||
58401572 | 208 | if (seq_print_acct(s, ct, IP_CT_DIR_ORIGINAL)) |
ea781f19 | 209 | goto release; |
9fb9cbb1 | 210 | |
c88130bc | 211 | if (!(test_bit(IPS_SEEN_REPLY_BIT, &ct->status))) |
e71456ae | 212 | seq_printf(s, "[UNREPLIED] "); |
9fb9cbb1 | 213 | |
824f1fbe JP |
214 | print_tuple(s, &ct->tuplehash[IP_CT_DIR_REPLY].tuple, |
215 | l3proto, l4proto); | |
9fb9cbb1 | 216 | |
58401572 | 217 | if (seq_print_acct(s, ct, IP_CT_DIR_REPLY)) |
ea781f19 | 218 | goto release; |
9fb9cbb1 | 219 | |
c88130bc | 220 | if (test_bit(IPS_ASSURED_BIT, &ct->status)) |
e71456ae | 221 | seq_printf(s, "[ASSURED] "); |
9fb9cbb1 | 222 | |
e71456ae | 223 | if (seq_has_overflowed(s)) |
ea781f19 | 224 | goto release; |
e71456ae SRRH |
225 | |
226 | #if defined(CONFIG_NF_CONNTRACK_MARK) | |
227 | seq_printf(s, "mark=%u ", ct->mark); | |
9fb9cbb1 YK |
228 | #endif |
229 | ||
e71456ae | 230 | ct_show_secctx(s, ct); |
7c9728c3 | 231 | |
5d0aa2cc | 232 | #ifdef CONFIG_NF_CONNTRACK_ZONES |
e71456ae | 233 | seq_printf(s, "zone=%u ", nf_ct_zone(ct)); |
5d0aa2cc PM |
234 | #endif |
235 | ||
e71456ae SRRH |
236 | ct_show_delta_time(s, ct); |
237 | ||
238 | seq_printf(s, "use=%u\n", atomic_read(&ct->ct_general.use)); | |
a992ca2a | 239 | |
e71456ae | 240 | if (seq_has_overflowed(s)) |
ea781f19 | 241 | goto release; |
a5d29264 | 242 | |
ea781f19 ED |
243 | ret = 0; |
244 | release: | |
245 | nf_ct_put(ct); | |
d88d7de0 | 246 | return ret; |
9fb9cbb1 YK |
247 | } |
248 | ||
56b3d975 | 249 | static const struct seq_operations ct_seq_ops = { |
9fb9cbb1 YK |
250 | .start = ct_seq_start, |
251 | .next = ct_seq_next, | |
252 | .stop = ct_seq_stop, | |
253 | .show = ct_seq_show | |
254 | }; | |
255 | ||
256 | static int ct_open(struct inode *inode, struct file *file) | |
257 | { | |
b2ce2c74 | 258 | return seq_open_net(inode, file, &ct_seq_ops, |
e2da5913 | 259 | sizeof(struct ct_iter_state)); |
9fb9cbb1 YK |
260 | } |
261 | ||
da7071d7 | 262 | static const struct file_operations ct_file_ops = { |
9fb9cbb1 YK |
263 | .owner = THIS_MODULE, |
264 | .open = ct_open, | |
265 | .read = seq_read, | |
266 | .llseek = seq_lseek, | |
b2ce2c74 | 267 | .release = seq_release_net, |
9fb9cbb1 YK |
268 | }; |
269 | ||
9fb9cbb1 YK |
270 | static void *ct_cpu_seq_start(struct seq_file *seq, loff_t *pos) |
271 | { | |
8e9df801 | 272 | struct net *net = seq_file_net(seq); |
9fb9cbb1 YK |
273 | int cpu; |
274 | ||
275 | if (*pos == 0) | |
276 | return SEQ_START_TOKEN; | |
277 | ||
0f23174a | 278 | for (cpu = *pos-1; cpu < nr_cpu_ids; ++cpu) { |
9fb9cbb1 YK |
279 | if (!cpu_possible(cpu)) |
280 | continue; | |
281 | *pos = cpu + 1; | |
8e9df801 | 282 | return per_cpu_ptr(net->ct.stat, cpu); |
9fb9cbb1 YK |
283 | } |
284 | ||
285 | return NULL; | |
286 | } | |
287 | ||
288 | static void *ct_cpu_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
289 | { | |
8e9df801 | 290 | struct net *net = seq_file_net(seq); |
9fb9cbb1 YK |
291 | int cpu; |
292 | ||
0f23174a | 293 | for (cpu = *pos; cpu < nr_cpu_ids; ++cpu) { |
9fb9cbb1 YK |
294 | if (!cpu_possible(cpu)) |
295 | continue; | |
296 | *pos = cpu + 1; | |
8e9df801 | 297 | return per_cpu_ptr(net->ct.stat, cpu); |
9fb9cbb1 YK |
298 | } |
299 | ||
300 | return NULL; | |
301 | } | |
302 | ||
303 | static void ct_cpu_seq_stop(struct seq_file *seq, void *v) | |
304 | { | |
305 | } | |
306 | ||
307 | static int ct_cpu_seq_show(struct seq_file *seq, void *v) | |
308 | { | |
8e9df801 AD |
309 | struct net *net = seq_file_net(seq); |
310 | unsigned int nr_conntracks = atomic_read(&net->ct.count); | |
32948588 | 311 | const struct ip_conntrack_stat *st = v; |
9fb9cbb1 YK |
312 | |
313 | if (v == SEQ_START_TOKEN) { | |
af740b2c | 314 | 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 |
315 | return 0; |
316 | } | |
317 | ||
318 | seq_printf(seq, "%08x %08x %08x %08x %08x %08x %08x %08x " | |
af740b2c | 319 | "%08x %08x %08x %08x %08x %08x %08x %08x %08x\n", |
9fb9cbb1 YK |
320 | nr_conntracks, |
321 | st->searched, | |
322 | st->found, | |
323 | st->new, | |
324 | st->invalid, | |
325 | st->ignore, | |
326 | st->delete, | |
327 | st->delete_list, | |
328 | st->insert, | |
329 | st->insert_failed, | |
330 | st->drop, | |
331 | st->early_drop, | |
332 | st->error, | |
333 | ||
334 | st->expect_new, | |
335 | st->expect_create, | |
af740b2c JDB |
336 | st->expect_delete, |
337 | st->search_restart | |
9fb9cbb1 YK |
338 | ); |
339 | return 0; | |
340 | } | |
341 | ||
56b3d975 | 342 | static const struct seq_operations ct_cpu_seq_ops = { |
9fb9cbb1 YK |
343 | .start = ct_cpu_seq_start, |
344 | .next = ct_cpu_seq_next, | |
345 | .stop = ct_cpu_seq_stop, | |
346 | .show = ct_cpu_seq_show, | |
347 | }; | |
348 | ||
349 | static int ct_cpu_seq_open(struct inode *inode, struct file *file) | |
350 | { | |
8e9df801 AD |
351 | return seq_open_net(inode, file, &ct_cpu_seq_ops, |
352 | sizeof(struct seq_net_private)); | |
9fb9cbb1 YK |
353 | } |
354 | ||
da7071d7 | 355 | static const struct file_operations ct_cpu_seq_fops = { |
9fb9cbb1 YK |
356 | .owner = THIS_MODULE, |
357 | .open = ct_cpu_seq_open, | |
358 | .read = seq_read, | |
359 | .llseek = seq_lseek, | |
8e9df801 | 360 | .release = seq_release_net, |
9fb9cbb1 | 361 | }; |
b916f7d4 | 362 | |
b2ce2c74 | 363 | static int nf_conntrack_standalone_init_proc(struct net *net) |
b916f7d4 AD |
364 | { |
365 | struct proc_dir_entry *pde; | |
366 | ||
d4beaa66 | 367 | pde = proc_create("nf_conntrack", 0440, net->proc_net, &ct_file_ops); |
b916f7d4 AD |
368 | if (!pde) |
369 | goto out_nf_conntrack; | |
52c0e111 | 370 | |
b2ce2c74 | 371 | pde = proc_create("nf_conntrack", S_IRUGO, net->proc_net_stat, |
52c0e111 | 372 | &ct_cpu_seq_fops); |
b916f7d4 AD |
373 | if (!pde) |
374 | goto out_stat_nf_conntrack; | |
b916f7d4 AD |
375 | return 0; |
376 | ||
377 | out_stat_nf_conntrack: | |
ece31ffd | 378 | remove_proc_entry("nf_conntrack", net->proc_net); |
b916f7d4 AD |
379 | out_nf_conntrack: |
380 | return -ENOMEM; | |
381 | } | |
382 | ||
b2ce2c74 | 383 | static void nf_conntrack_standalone_fini_proc(struct net *net) |
b916f7d4 | 384 | { |
b2ce2c74 | 385 | remove_proc_entry("nf_conntrack", net->proc_net_stat); |
ece31ffd | 386 | remove_proc_entry("nf_conntrack", net->proc_net); |
b916f7d4 AD |
387 | } |
388 | #else | |
b2ce2c74 | 389 | static int nf_conntrack_standalone_init_proc(struct net *net) |
b916f7d4 AD |
390 | { |
391 | return 0; | |
392 | } | |
393 | ||
b2ce2c74 | 394 | static void nf_conntrack_standalone_fini_proc(struct net *net) |
b916f7d4 AD |
395 | { |
396 | } | |
54b07dca | 397 | #endif /* CONFIG_NF_CONNTRACK_PROCFS */ |
9fb9cbb1 YK |
398 | |
399 | /* Sysctl support */ | |
400 | ||
401 | #ifdef CONFIG_SYSCTL | |
9fb9cbb1 YK |
402 | /* Log invalid packets of a given protocol */ |
403 | static int log_invalid_proto_min = 0; | |
404 | static int log_invalid_proto_max = 255; | |
405 | ||
9714be7d | 406 | static struct ctl_table_header *nf_ct_netfilter_header; |
9fb9cbb1 | 407 | |
fe2c6338 | 408 | static struct ctl_table nf_ct_sysctl_table[] = { |
9fb9cbb1 | 409 | { |
9fb9cbb1 YK |
410 | .procname = "nf_conntrack_max", |
411 | .data = &nf_conntrack_max, | |
412 | .maxlen = sizeof(int), | |
413 | .mode = 0644, | |
6d9f239a | 414 | .proc_handler = proc_dointvec, |
9fb9cbb1 YK |
415 | }, |
416 | { | |
9fb9cbb1 | 417 | .procname = "nf_conntrack_count", |
49ac8713 | 418 | .data = &init_net.ct.count, |
9fb9cbb1 YK |
419 | .maxlen = sizeof(int), |
420 | .mode = 0444, | |
6d9f239a | 421 | .proc_handler = proc_dointvec, |
9fb9cbb1 YK |
422 | }, |
423 | { | |
9fb9cbb1 | 424 | .procname = "nf_conntrack_buckets", |
d696c7bd | 425 | .data = &init_net.ct.htable_size, |
9fb9cbb1 YK |
426 | .maxlen = sizeof(unsigned int), |
427 | .mode = 0444, | |
6d9f239a | 428 | .proc_handler = proc_dointvec, |
9fb9cbb1 | 429 | }, |
39a27a35 | 430 | { |
39a27a35 | 431 | .procname = "nf_conntrack_checksum", |
c04d0552 | 432 | .data = &init_net.ct.sysctl_checksum, |
39a27a35 PM |
433 | .maxlen = sizeof(unsigned int), |
434 | .mode = 0644, | |
6d9f239a | 435 | .proc_handler = proc_dointvec, |
39a27a35 | 436 | }, |
9fb9cbb1 | 437 | { |
9fb9cbb1 | 438 | .procname = "nf_conntrack_log_invalid", |
c2a2c7e0 | 439 | .data = &init_net.ct.sysctl_log_invalid, |
9fb9cbb1 YK |
440 | .maxlen = sizeof(unsigned int), |
441 | .mode = 0644, | |
6d9f239a | 442 | .proc_handler = proc_dointvec_minmax, |
9fb9cbb1 YK |
443 | .extra1 = &log_invalid_proto_min, |
444 | .extra2 = &log_invalid_proto_max, | |
445 | }, | |
f264a7df | 446 | { |
f264a7df PM |
447 | .procname = "nf_conntrack_expect_max", |
448 | .data = &nf_ct_expect_max, | |
449 | .maxlen = sizeof(int), | |
450 | .mode = 0644, | |
6d9f239a | 451 | .proc_handler = proc_dointvec, |
f264a7df | 452 | }, |
f8572d8f | 453 | { } |
9fb9cbb1 YK |
454 | }; |
455 | ||
456 | #define NET_NF_CONNTRACK_MAX 2089 | |
457 | ||
fe2c6338 | 458 | static struct ctl_table nf_ct_netfilter_table[] = { |
9fb9cbb1 | 459 | { |
9fb9cbb1 YK |
460 | .procname = "nf_conntrack_max", |
461 | .data = &nf_conntrack_max, | |
462 | .maxlen = sizeof(int), | |
463 | .mode = 0644, | |
6d9f239a | 464 | .proc_handler = proc_dointvec, |
9fb9cbb1 | 465 | }, |
f8572d8f | 466 | { } |
9fb9cbb1 YK |
467 | }; |
468 | ||
80250707 | 469 | static int nf_conntrack_standalone_init_sysctl(struct net *net) |
b916f7d4 | 470 | { |
80250707 AD |
471 | struct ctl_table *table; |
472 | ||
80250707 AD |
473 | table = kmemdup(nf_ct_sysctl_table, sizeof(nf_ct_sysctl_table), |
474 | GFP_KERNEL); | |
475 | if (!table) | |
476 | goto out_kmemdup; | |
477 | ||
478 | table[1].data = &net->ct.count; | |
d696c7bd | 479 | table[2].data = &net->ct.htable_size; |
c04d0552 | 480 | table[3].data = &net->ct.sysctl_checksum; |
c2a2c7e0 | 481 | table[4].data = &net->ct.sysctl_log_invalid; |
80250707 | 482 | |
464dc801 EB |
483 | /* Don't export sysctls to unprivileged users */ |
484 | if (net->user_ns != &init_user_ns) | |
485 | table[0].procname = NULL; | |
486 | ||
ec8f23ce | 487 | net->ct.sysctl_header = register_net_sysctl(net, "net/netfilter", table); |
80250707 | 488 | if (!net->ct.sysctl_header) |
9714be7d KPO |
489 | goto out_unregister_netfilter; |
490 | ||
b916f7d4 AD |
491 | return 0; |
492 | ||
9714be7d | 493 | out_unregister_netfilter: |
80250707 AD |
494 | kfree(table); |
495 | out_kmemdup: | |
9714be7d | 496 | return -ENOMEM; |
b916f7d4 AD |
497 | } |
498 | ||
80250707 | 499 | static void nf_conntrack_standalone_fini_sysctl(struct net *net) |
b916f7d4 | 500 | { |
80250707 AD |
501 | struct ctl_table *table; |
502 | ||
80250707 AD |
503 | table = net->ct.sysctl_header->ctl_table_arg; |
504 | unregister_net_sysctl_table(net->ct.sysctl_header); | |
505 | kfree(table); | |
b916f7d4 AD |
506 | } |
507 | #else | |
80250707 | 508 | static int nf_conntrack_standalone_init_sysctl(struct net *net) |
b916f7d4 AD |
509 | { |
510 | return 0; | |
511 | } | |
512 | ||
80250707 | 513 | static void nf_conntrack_standalone_fini_sysctl(struct net *net) |
b916f7d4 AD |
514 | { |
515 | } | |
9fb9cbb1 YK |
516 | #endif /* CONFIG_SYSCTL */ |
517 | ||
f94161c1 | 518 | static int nf_conntrack_pernet_init(struct net *net) |
dfdb8d79 | 519 | { |
b2ce2c74 AD |
520 | int ret; |
521 | ||
f94161c1 | 522 | ret = nf_conntrack_init_net(net); |
b2ce2c74 AD |
523 | if (ret < 0) |
524 | goto out_init; | |
f94161c1 | 525 | |
b2ce2c74 AD |
526 | ret = nf_conntrack_standalone_init_proc(net); |
527 | if (ret < 0) | |
528 | goto out_proc; | |
f94161c1 | 529 | |
c04d0552 | 530 | net->ct.sysctl_checksum = 1; |
c2a2c7e0 | 531 | net->ct.sysctl_log_invalid = 0; |
80250707 AD |
532 | ret = nf_conntrack_standalone_init_sysctl(net); |
533 | if (ret < 0) | |
534 | goto out_sysctl; | |
f94161c1 | 535 | |
b2ce2c74 AD |
536 | return 0; |
537 | ||
80250707 AD |
538 | out_sysctl: |
539 | nf_conntrack_standalone_fini_proc(net); | |
b2ce2c74 | 540 | out_proc: |
f94161c1 | 541 | nf_conntrack_cleanup_net(net); |
b2ce2c74 AD |
542 | out_init: |
543 | return ret; | |
dfdb8d79 AD |
544 | } |
545 | ||
dece40e8 | 546 | static void nf_conntrack_pernet_exit(struct list_head *net_exit_list) |
dfdb8d79 | 547 | { |
dece40e8 VD |
548 | struct net *net; |
549 | ||
550 | list_for_each_entry(net, net_exit_list, exit_list) { | |
551 | nf_conntrack_standalone_fini_sysctl(net); | |
552 | nf_conntrack_standalone_fini_proc(net); | |
553 | } | |
554 | nf_conntrack_cleanup_net_list(net_exit_list); | |
dfdb8d79 AD |
555 | } |
556 | ||
557 | static struct pernet_operations nf_conntrack_net_ops = { | |
dece40e8 VD |
558 | .init = nf_conntrack_pernet_init, |
559 | .exit_batch = nf_conntrack_pernet_exit, | |
dfdb8d79 AD |
560 | }; |
561 | ||
65b4b4e8 | 562 | static int __init nf_conntrack_standalone_init(void) |
9fb9cbb1 | 563 | { |
f94161c1 G |
564 | int ret = nf_conntrack_init_start(); |
565 | if (ret < 0) | |
566 | goto out_start; | |
567 | ||
5f9f946b | 568 | #ifdef CONFIG_SYSCTL |
f94161c1 G |
569 | nf_ct_netfilter_header = |
570 | register_net_sysctl(&init_net, "net", nf_ct_netfilter_table); | |
5f9f946b PNA |
571 | if (!nf_ct_netfilter_header) { |
572 | pr_err("nf_conntrack: can't register to sysctl.\n"); | |
5389090b | 573 | ret = -ENOMEM; |
f94161c1 | 574 | goto out_sysctl; |
5f9f946b PNA |
575 | } |
576 | #endif | |
f94161c1 G |
577 | |
578 | ret = register_pernet_subsys(&nf_conntrack_net_ops); | |
579 | if (ret < 0) | |
580 | goto out_pernet; | |
581 | ||
582 | nf_conntrack_init_end(); | |
583 | return 0; | |
584 | ||
585 | out_pernet: | |
5f9f946b | 586 | #ifdef CONFIG_SYSCTL |
f94161c1 G |
587 | unregister_net_sysctl_table(nf_ct_netfilter_header); |
588 | out_sysctl: | |
5f9f946b | 589 | #endif |
f94161c1 G |
590 | nf_conntrack_cleanup_end(); |
591 | out_start: | |
592 | return ret; | |
9fb9cbb1 YK |
593 | } |
594 | ||
65b4b4e8 | 595 | static void __exit nf_conntrack_standalone_fini(void) |
9fb9cbb1 | 596 | { |
f94161c1 | 597 | nf_conntrack_cleanup_start(); |
dfdb8d79 | 598 | unregister_pernet_subsys(&nf_conntrack_net_ops); |
5f9f946b | 599 | #ifdef CONFIG_SYSCTL |
f94161c1 | 600 | unregister_net_sysctl_table(nf_ct_netfilter_header); |
5f9f946b | 601 | #endif |
1e47ee83 | 602 | nf_conntrack_cleanup_end(); |
9fb9cbb1 YK |
603 | } |
604 | ||
65b4b4e8 AM |
605 | module_init(nf_conntrack_standalone_init); |
606 | module_exit(nf_conntrack_standalone_fini); | |
9fb9cbb1 YK |
607 | |
608 | /* Some modules need us, but don't depend directly on any symbol. | |
609 | They should call this. */ | |
2e4e6a17 | 610 | void need_conntrack(void) |
9fb9cbb1 YK |
611 | { |
612 | } | |
13b18339 | 613 | EXPORT_SYMBOL_GPL(need_conntrack); |