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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 |
77ab9cff | 39 | int |
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 | { |
605dcad6 | 44 | return l3proto->print_tuple(s, tuple) || l4proto->print_tuple(s, tuple); |
9fb9cbb1 | 45 | } |
e4bd8bce | 46 | EXPORT_SYMBOL_GPL(print_tuple); |
9fb9cbb1 | 47 | |
9fb9cbb1 | 48 | struct ct_iter_state { |
b2ce2c74 | 49 | struct seq_net_private p; |
9fb9cbb1 | 50 | unsigned int bucket; |
a992ca2a | 51 | u_int64_t time_now; |
9fb9cbb1 YK |
52 | }; |
53 | ||
ea781f19 | 54 | static struct hlist_nulls_node *ct_get_first(struct seq_file *seq) |
9fb9cbb1 | 55 | { |
b2ce2c74 | 56 | struct net *net = seq_file_net(seq); |
9fb9cbb1 | 57 | struct ct_iter_state *st = seq->private; |
ea781f19 | 58 | struct hlist_nulls_node *n; |
9fb9cbb1 YK |
59 | |
60 | for (st->bucket = 0; | |
d696c7bd | 61 | st->bucket < net->ct.htable_size; |
9fb9cbb1 | 62 | st->bucket++) { |
0e60ebe0 | 63 | n = rcu_dereference(hlist_nulls_first_rcu(&net->ct.hash[st->bucket])); |
ea781f19 | 64 | if (!is_a_nulls(n)) |
76507f69 | 65 | return n; |
9fb9cbb1 YK |
66 | } |
67 | return NULL; | |
68 | } | |
69 | ||
ea781f19 ED |
70 | static struct hlist_nulls_node *ct_get_next(struct seq_file *seq, |
71 | struct hlist_nulls_node *head) | |
9fb9cbb1 | 72 | { |
b2ce2c74 | 73 | struct net *net = seq_file_net(seq); |
9fb9cbb1 YK |
74 | struct ct_iter_state *st = seq->private; |
75 | ||
0e60ebe0 | 76 | head = rcu_dereference(hlist_nulls_next_rcu(head)); |
ea781f19 ED |
77 | while (is_a_nulls(head)) { |
78 | if (likely(get_nulls_value(head) == st->bucket)) { | |
d696c7bd | 79 | if (++st->bucket >= net->ct.htable_size) |
ea781f19 ED |
80 | return NULL; |
81 | } | |
0e60ebe0 ED |
82 | head = rcu_dereference( |
83 | hlist_nulls_first_rcu( | |
84 | &net->ct.hash[st->bucket])); | |
9fb9cbb1 YK |
85 | } |
86 | return head; | |
87 | } | |
88 | ||
ea781f19 | 89 | static struct hlist_nulls_node *ct_get_idx(struct seq_file *seq, loff_t pos) |
9fb9cbb1 | 90 | { |
ea781f19 | 91 | struct hlist_nulls_node *head = ct_get_first(seq); |
9fb9cbb1 YK |
92 | |
93 | if (head) | |
94 | while (pos && (head = ct_get_next(seq, head))) | |
95 | pos--; | |
96 | return pos ? NULL : head; | |
97 | } | |
98 | ||
99 | static void *ct_seq_start(struct seq_file *seq, loff_t *pos) | |
76507f69 | 100 | __acquires(RCU) |
9fb9cbb1 | 101 | { |
a992ca2a PNA |
102 | struct ct_iter_state *st = seq->private; |
103 | ||
d2de875c | 104 | st->time_now = ktime_get_real_ns(); |
76507f69 | 105 | rcu_read_lock(); |
9fb9cbb1 YK |
106 | return ct_get_idx(seq, *pos); |
107 | } | |
108 | ||
109 | static void *ct_seq_next(struct seq_file *s, void *v, loff_t *pos) | |
110 | { | |
111 | (*pos)++; | |
112 | return ct_get_next(s, v); | |
113 | } | |
114 | ||
115 | static void ct_seq_stop(struct seq_file *s, void *v) | |
76507f69 | 116 | __releases(RCU) |
9fb9cbb1 | 117 | { |
76507f69 | 118 | rcu_read_unlock(); |
9fb9cbb1 YK |
119 | } |
120 | ||
1ae4de0c EP |
121 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
122 | static int ct_show_secctx(struct seq_file *s, const struct nf_conn *ct) | |
123 | { | |
124 | int ret; | |
125 | u32 len; | |
126 | char *secctx; | |
127 | ||
128 | ret = security_secid_to_secctx(ct->secmark, &secctx, &len); | |
129 | if (ret) | |
cba85b53 | 130 | return 0; |
1ae4de0c EP |
131 | |
132 | ret = seq_printf(s, "secctx=%s ", secctx); | |
133 | ||
134 | security_release_secctx(secctx, len); | |
135 | return ret; | |
136 | } | |
137 | #else | |
138 | static inline int ct_show_secctx(struct seq_file *s, const struct nf_conn *ct) | |
139 | { | |
140 | return 0; | |
141 | } | |
142 | #endif | |
143 | ||
a992ca2a | 144 | #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP |
f5c88f56 | 145 | static int ct_show_delta_time(struct seq_file *s, const struct nf_conn *ct) |
a992ca2a | 146 | { |
f5c88f56 | 147 | struct ct_iter_state *st = s->private; |
a992ca2a | 148 | struct nf_conn_tstamp *tstamp; |
f5c88f56 | 149 | s64 delta_time; |
a992ca2a PNA |
150 | |
151 | tstamp = nf_conn_tstamp_find(ct); | |
152 | if (tstamp) { | |
f5c88f56 PM |
153 | delta_time = st->time_now - tstamp->start; |
154 | if (delta_time > 0) | |
155 | delta_time = div_s64(delta_time, NSEC_PER_SEC); | |
156 | else | |
157 | delta_time = 0; | |
158 | ||
159 | return seq_printf(s, "delta-time=%llu ", | |
160 | (unsigned long long)delta_time); | |
a992ca2a | 161 | } |
f5c88f56 | 162 | return 0; |
a992ca2a PNA |
163 | } |
164 | #else | |
165 | static inline int | |
166 | ct_show_delta_time(struct seq_file *s, const struct nf_conn *ct) | |
167 | { | |
168 | return 0; | |
169 | } | |
170 | #endif | |
171 | ||
9fb9cbb1 YK |
172 | /* return 0 on success, 1 in case of error */ |
173 | static int ct_seq_show(struct seq_file *s, void *v) | |
174 | { | |
ea781f19 ED |
175 | struct nf_conntrack_tuple_hash *hash = v; |
176 | struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(hash); | |
32948588 JE |
177 | const struct nf_conntrack_l3proto *l3proto; |
178 | const struct nf_conntrack_l4proto *l4proto; | |
ea781f19 | 179 | int ret = 0; |
9fb9cbb1 | 180 | |
c88130bc | 181 | NF_CT_ASSERT(ct); |
ea781f19 ED |
182 | if (unlikely(!atomic_inc_not_zero(&ct->ct_general.use))) |
183 | return 0; | |
9fb9cbb1 YK |
184 | |
185 | /* we only want to print DIR_ORIGINAL */ | |
186 | if (NF_CT_DIRECTION(hash)) | |
ea781f19 | 187 | goto release; |
9fb9cbb1 | 188 | |
5e8fbe2a | 189 | l3proto = __nf_ct_l3proto_find(nf_ct_l3num(ct)); |
9fb9cbb1 | 190 | NF_CT_ASSERT(l3proto); |
5e8fbe2a | 191 | l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct)); |
605dcad6 | 192 | NF_CT_ASSERT(l4proto); |
9fb9cbb1 | 193 | |
ea781f19 | 194 | ret = -ENOSPC; |
9fb9cbb1 | 195 | if (seq_printf(s, "%-8s %u %-8s %u %ld ", |
5e8fbe2a PM |
196 | l3proto->name, nf_ct_l3num(ct), |
197 | l4proto->name, nf_ct_protonum(ct), | |
c88130bc PM |
198 | timer_pending(&ct->timeout) |
199 | ? (long)(ct->timeout.expires - jiffies)/HZ : 0) != 0) | |
ea781f19 | 200 | goto release; |
9fb9cbb1 | 201 | |
c88130bc | 202 | if (l4proto->print_conntrack && l4proto->print_conntrack(s, ct)) |
ea781f19 | 203 | goto release; |
9fb9cbb1 | 204 | |
c88130bc | 205 | if (print_tuple(s, &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple, |
605dcad6 | 206 | l3proto, l4proto)) |
ea781f19 | 207 | goto release; |
9fb9cbb1 | 208 | |
58401572 | 209 | if (seq_print_acct(s, ct, IP_CT_DIR_ORIGINAL)) |
ea781f19 | 210 | goto release; |
9fb9cbb1 | 211 | |
c88130bc | 212 | if (!(test_bit(IPS_SEEN_REPLY_BIT, &ct->status))) |
9fb9cbb1 | 213 | if (seq_printf(s, "[UNREPLIED] ")) |
ea781f19 | 214 | goto release; |
9fb9cbb1 | 215 | |
c88130bc | 216 | if (print_tuple(s, &ct->tuplehash[IP_CT_DIR_REPLY].tuple, |
605dcad6 | 217 | l3proto, l4proto)) |
ea781f19 | 218 | goto release; |
9fb9cbb1 | 219 | |
58401572 | 220 | if (seq_print_acct(s, ct, IP_CT_DIR_REPLY)) |
ea781f19 | 221 | goto release; |
9fb9cbb1 | 222 | |
c88130bc | 223 | if (test_bit(IPS_ASSURED_BIT, &ct->status)) |
9fb9cbb1 | 224 | if (seq_printf(s, "[ASSURED] ")) |
ea781f19 | 225 | goto release; |
9fb9cbb1 YK |
226 | |
227 | #if defined(CONFIG_NF_CONNTRACK_MARK) | |
c88130bc | 228 | if (seq_printf(s, "mark=%u ", ct->mark)) |
ea781f19 | 229 | goto release; |
9fb9cbb1 YK |
230 | #endif |
231 | ||
1ae4de0c | 232 | if (ct_show_secctx(s, ct)) |
ea781f19 | 233 | goto release; |
7c9728c3 | 234 | |
5d0aa2cc PM |
235 | #ifdef CONFIG_NF_CONNTRACK_ZONES |
236 | if (seq_printf(s, "zone=%u ", nf_ct_zone(ct))) | |
237 | goto release; | |
238 | #endif | |
239 | ||
a992ca2a PNA |
240 | if (ct_show_delta_time(s, ct)) |
241 | goto release; | |
242 | ||
c88130bc | 243 | if (seq_printf(s, "use=%u\n", atomic_read(&ct->ct_general.use))) |
ea781f19 | 244 | goto release; |
a5d29264 | 245 | |
ea781f19 ED |
246 | ret = 0; |
247 | release: | |
248 | nf_ct_put(ct); | |
d88d7de0 | 249 | return ret; |
9fb9cbb1 YK |
250 | } |
251 | ||
56b3d975 | 252 | static const struct seq_operations ct_seq_ops = { |
9fb9cbb1 YK |
253 | .start = ct_seq_start, |
254 | .next = ct_seq_next, | |
255 | .stop = ct_seq_stop, | |
256 | .show = ct_seq_show | |
257 | }; | |
258 | ||
259 | static int ct_open(struct inode *inode, struct file *file) | |
260 | { | |
b2ce2c74 | 261 | return seq_open_net(inode, file, &ct_seq_ops, |
e2da5913 | 262 | sizeof(struct ct_iter_state)); |
9fb9cbb1 YK |
263 | } |
264 | ||
da7071d7 | 265 | static const struct file_operations ct_file_ops = { |
9fb9cbb1 YK |
266 | .owner = THIS_MODULE, |
267 | .open = ct_open, | |
268 | .read = seq_read, | |
269 | .llseek = seq_lseek, | |
b2ce2c74 | 270 | .release = seq_release_net, |
9fb9cbb1 YK |
271 | }; |
272 | ||
9fb9cbb1 YK |
273 | static void *ct_cpu_seq_start(struct seq_file *seq, loff_t *pos) |
274 | { | |
8e9df801 | 275 | struct net *net = seq_file_net(seq); |
9fb9cbb1 YK |
276 | int cpu; |
277 | ||
278 | if (*pos == 0) | |
279 | return SEQ_START_TOKEN; | |
280 | ||
0f23174a | 281 | for (cpu = *pos-1; cpu < nr_cpu_ids; ++cpu) { |
9fb9cbb1 YK |
282 | if (!cpu_possible(cpu)) |
283 | continue; | |
284 | *pos = cpu + 1; | |
8e9df801 | 285 | return per_cpu_ptr(net->ct.stat, cpu); |
9fb9cbb1 YK |
286 | } |
287 | ||
288 | return NULL; | |
289 | } | |
290 | ||
291 | static void *ct_cpu_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
292 | { | |
8e9df801 | 293 | struct net *net = seq_file_net(seq); |
9fb9cbb1 YK |
294 | int cpu; |
295 | ||
0f23174a | 296 | for (cpu = *pos; cpu < nr_cpu_ids; ++cpu) { |
9fb9cbb1 YK |
297 | if (!cpu_possible(cpu)) |
298 | continue; | |
299 | *pos = cpu + 1; | |
8e9df801 | 300 | return per_cpu_ptr(net->ct.stat, cpu); |
9fb9cbb1 YK |
301 | } |
302 | ||
303 | return NULL; | |
304 | } | |
305 | ||
306 | static void ct_cpu_seq_stop(struct seq_file *seq, void *v) | |
307 | { | |
308 | } | |
309 | ||
310 | static int ct_cpu_seq_show(struct seq_file *seq, void *v) | |
311 | { | |
8e9df801 AD |
312 | struct net *net = seq_file_net(seq); |
313 | unsigned int nr_conntracks = atomic_read(&net->ct.count); | |
32948588 | 314 | const struct ip_conntrack_stat *st = v; |
9fb9cbb1 YK |
315 | |
316 | if (v == SEQ_START_TOKEN) { | |
af740b2c | 317 | 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 |
318 | return 0; |
319 | } | |
320 | ||
321 | seq_printf(seq, "%08x %08x %08x %08x %08x %08x %08x %08x " | |
af740b2c | 322 | "%08x %08x %08x %08x %08x %08x %08x %08x %08x\n", |
9fb9cbb1 YK |
323 | nr_conntracks, |
324 | st->searched, | |
325 | st->found, | |
326 | st->new, | |
327 | st->invalid, | |
328 | st->ignore, | |
329 | st->delete, | |
330 | st->delete_list, | |
331 | st->insert, | |
332 | st->insert_failed, | |
333 | st->drop, | |
334 | st->early_drop, | |
335 | st->error, | |
336 | ||
337 | st->expect_new, | |
338 | st->expect_create, | |
af740b2c JDB |
339 | st->expect_delete, |
340 | st->search_restart | |
9fb9cbb1 YK |
341 | ); |
342 | return 0; | |
343 | } | |
344 | ||
56b3d975 | 345 | static const struct seq_operations ct_cpu_seq_ops = { |
9fb9cbb1 YK |
346 | .start = ct_cpu_seq_start, |
347 | .next = ct_cpu_seq_next, | |
348 | .stop = ct_cpu_seq_stop, | |
349 | .show = ct_cpu_seq_show, | |
350 | }; | |
351 | ||
352 | static int ct_cpu_seq_open(struct inode *inode, struct file *file) | |
353 | { | |
8e9df801 AD |
354 | return seq_open_net(inode, file, &ct_cpu_seq_ops, |
355 | sizeof(struct seq_net_private)); | |
9fb9cbb1 YK |
356 | } |
357 | ||
da7071d7 | 358 | static const struct file_operations ct_cpu_seq_fops = { |
9fb9cbb1 YK |
359 | .owner = THIS_MODULE, |
360 | .open = ct_cpu_seq_open, | |
361 | .read = seq_read, | |
362 | .llseek = seq_lseek, | |
8e9df801 | 363 | .release = seq_release_net, |
9fb9cbb1 | 364 | }; |
b916f7d4 | 365 | |
b2ce2c74 | 366 | static int nf_conntrack_standalone_init_proc(struct net *net) |
b916f7d4 AD |
367 | { |
368 | struct proc_dir_entry *pde; | |
369 | ||
d4beaa66 | 370 | pde = proc_create("nf_conntrack", 0440, net->proc_net, &ct_file_ops); |
b916f7d4 AD |
371 | if (!pde) |
372 | goto out_nf_conntrack; | |
52c0e111 | 373 | |
b2ce2c74 | 374 | pde = proc_create("nf_conntrack", S_IRUGO, net->proc_net_stat, |
52c0e111 | 375 | &ct_cpu_seq_fops); |
b916f7d4 AD |
376 | if (!pde) |
377 | goto out_stat_nf_conntrack; | |
b916f7d4 AD |
378 | return 0; |
379 | ||
380 | out_stat_nf_conntrack: | |
ece31ffd | 381 | remove_proc_entry("nf_conntrack", net->proc_net); |
b916f7d4 AD |
382 | out_nf_conntrack: |
383 | return -ENOMEM; | |
384 | } | |
385 | ||
b2ce2c74 | 386 | static void nf_conntrack_standalone_fini_proc(struct net *net) |
b916f7d4 | 387 | { |
b2ce2c74 | 388 | remove_proc_entry("nf_conntrack", net->proc_net_stat); |
ece31ffd | 389 | remove_proc_entry("nf_conntrack", net->proc_net); |
b916f7d4 AD |
390 | } |
391 | #else | |
b2ce2c74 | 392 | static int nf_conntrack_standalone_init_proc(struct net *net) |
b916f7d4 AD |
393 | { |
394 | return 0; | |
395 | } | |
396 | ||
b2ce2c74 | 397 | static void nf_conntrack_standalone_fini_proc(struct net *net) |
b916f7d4 AD |
398 | { |
399 | } | |
54b07dca | 400 | #endif /* CONFIG_NF_CONNTRACK_PROCFS */ |
9fb9cbb1 YK |
401 | |
402 | /* Sysctl support */ | |
403 | ||
404 | #ifdef CONFIG_SYSCTL | |
9fb9cbb1 YK |
405 | /* Log invalid packets of a given protocol */ |
406 | static int log_invalid_proto_min = 0; | |
407 | static int log_invalid_proto_max = 255; | |
408 | ||
9714be7d | 409 | static struct ctl_table_header *nf_ct_netfilter_header; |
9fb9cbb1 | 410 | |
fe2c6338 | 411 | static struct ctl_table nf_ct_sysctl_table[] = { |
9fb9cbb1 | 412 | { |
9fb9cbb1 YK |
413 | .procname = "nf_conntrack_max", |
414 | .data = &nf_conntrack_max, | |
415 | .maxlen = sizeof(int), | |
416 | .mode = 0644, | |
6d9f239a | 417 | .proc_handler = proc_dointvec, |
9fb9cbb1 YK |
418 | }, |
419 | { | |
9fb9cbb1 | 420 | .procname = "nf_conntrack_count", |
49ac8713 | 421 | .data = &init_net.ct.count, |
9fb9cbb1 YK |
422 | .maxlen = sizeof(int), |
423 | .mode = 0444, | |
6d9f239a | 424 | .proc_handler = proc_dointvec, |
9fb9cbb1 YK |
425 | }, |
426 | { | |
9fb9cbb1 | 427 | .procname = "nf_conntrack_buckets", |
d696c7bd | 428 | .data = &init_net.ct.htable_size, |
9fb9cbb1 YK |
429 | .maxlen = sizeof(unsigned int), |
430 | .mode = 0444, | |
6d9f239a | 431 | .proc_handler = proc_dointvec, |
9fb9cbb1 | 432 | }, |
39a27a35 | 433 | { |
39a27a35 | 434 | .procname = "nf_conntrack_checksum", |
c04d0552 | 435 | .data = &init_net.ct.sysctl_checksum, |
39a27a35 PM |
436 | .maxlen = sizeof(unsigned int), |
437 | .mode = 0644, | |
6d9f239a | 438 | .proc_handler = proc_dointvec, |
39a27a35 | 439 | }, |
9fb9cbb1 | 440 | { |
9fb9cbb1 | 441 | .procname = "nf_conntrack_log_invalid", |
c2a2c7e0 | 442 | .data = &init_net.ct.sysctl_log_invalid, |
9fb9cbb1 YK |
443 | .maxlen = sizeof(unsigned int), |
444 | .mode = 0644, | |
6d9f239a | 445 | .proc_handler = proc_dointvec_minmax, |
9fb9cbb1 YK |
446 | .extra1 = &log_invalid_proto_min, |
447 | .extra2 = &log_invalid_proto_max, | |
448 | }, | |
f264a7df | 449 | { |
f264a7df PM |
450 | .procname = "nf_conntrack_expect_max", |
451 | .data = &nf_ct_expect_max, | |
452 | .maxlen = sizeof(int), | |
453 | .mode = 0644, | |
6d9f239a | 454 | .proc_handler = proc_dointvec, |
f264a7df | 455 | }, |
f8572d8f | 456 | { } |
9fb9cbb1 YK |
457 | }; |
458 | ||
459 | #define NET_NF_CONNTRACK_MAX 2089 | |
460 | ||
fe2c6338 | 461 | static struct ctl_table nf_ct_netfilter_table[] = { |
9fb9cbb1 | 462 | { |
9fb9cbb1 YK |
463 | .procname = "nf_conntrack_max", |
464 | .data = &nf_conntrack_max, | |
465 | .maxlen = sizeof(int), | |
466 | .mode = 0644, | |
6d9f239a | 467 | .proc_handler = proc_dointvec, |
9fb9cbb1 | 468 | }, |
f8572d8f | 469 | { } |
9fb9cbb1 YK |
470 | }; |
471 | ||
80250707 | 472 | static int nf_conntrack_standalone_init_sysctl(struct net *net) |
b916f7d4 | 473 | { |
80250707 AD |
474 | struct ctl_table *table; |
475 | ||
80250707 AD |
476 | table = kmemdup(nf_ct_sysctl_table, sizeof(nf_ct_sysctl_table), |
477 | GFP_KERNEL); | |
478 | if (!table) | |
479 | goto out_kmemdup; | |
480 | ||
481 | table[1].data = &net->ct.count; | |
d696c7bd | 482 | table[2].data = &net->ct.htable_size; |
c04d0552 | 483 | table[3].data = &net->ct.sysctl_checksum; |
c2a2c7e0 | 484 | table[4].data = &net->ct.sysctl_log_invalid; |
80250707 | 485 | |
464dc801 EB |
486 | /* Don't export sysctls to unprivileged users */ |
487 | if (net->user_ns != &init_user_ns) | |
488 | table[0].procname = NULL; | |
489 | ||
ec8f23ce | 490 | net->ct.sysctl_header = register_net_sysctl(net, "net/netfilter", table); |
80250707 | 491 | if (!net->ct.sysctl_header) |
9714be7d KPO |
492 | goto out_unregister_netfilter; |
493 | ||
b916f7d4 AD |
494 | return 0; |
495 | ||
9714be7d | 496 | out_unregister_netfilter: |
80250707 AD |
497 | kfree(table); |
498 | out_kmemdup: | |
9714be7d | 499 | return -ENOMEM; |
b916f7d4 AD |
500 | } |
501 | ||
80250707 | 502 | static void nf_conntrack_standalone_fini_sysctl(struct net *net) |
b916f7d4 | 503 | { |
80250707 AD |
504 | struct ctl_table *table; |
505 | ||
80250707 AD |
506 | table = net->ct.sysctl_header->ctl_table_arg; |
507 | unregister_net_sysctl_table(net->ct.sysctl_header); | |
508 | kfree(table); | |
b916f7d4 AD |
509 | } |
510 | #else | |
80250707 | 511 | static int nf_conntrack_standalone_init_sysctl(struct net *net) |
b916f7d4 AD |
512 | { |
513 | return 0; | |
514 | } | |
515 | ||
80250707 | 516 | static void nf_conntrack_standalone_fini_sysctl(struct net *net) |
b916f7d4 AD |
517 | { |
518 | } | |
9fb9cbb1 YK |
519 | #endif /* CONFIG_SYSCTL */ |
520 | ||
f94161c1 | 521 | static int nf_conntrack_pernet_init(struct net *net) |
dfdb8d79 | 522 | { |
b2ce2c74 AD |
523 | int ret; |
524 | ||
f94161c1 | 525 | ret = nf_conntrack_init_net(net); |
b2ce2c74 AD |
526 | if (ret < 0) |
527 | goto out_init; | |
f94161c1 | 528 | |
b2ce2c74 AD |
529 | ret = nf_conntrack_standalone_init_proc(net); |
530 | if (ret < 0) | |
531 | goto out_proc; | |
f94161c1 | 532 | |
c04d0552 | 533 | net->ct.sysctl_checksum = 1; |
c2a2c7e0 | 534 | net->ct.sysctl_log_invalid = 0; |
80250707 AD |
535 | ret = nf_conntrack_standalone_init_sysctl(net); |
536 | if (ret < 0) | |
537 | goto out_sysctl; | |
f94161c1 | 538 | |
b2ce2c74 AD |
539 | return 0; |
540 | ||
80250707 AD |
541 | out_sysctl: |
542 | nf_conntrack_standalone_fini_proc(net); | |
b2ce2c74 | 543 | out_proc: |
f94161c1 | 544 | nf_conntrack_cleanup_net(net); |
b2ce2c74 AD |
545 | out_init: |
546 | return ret; | |
dfdb8d79 AD |
547 | } |
548 | ||
dece40e8 | 549 | static void nf_conntrack_pernet_exit(struct list_head *net_exit_list) |
dfdb8d79 | 550 | { |
dece40e8 VD |
551 | struct net *net; |
552 | ||
553 | list_for_each_entry(net, net_exit_list, exit_list) { | |
554 | nf_conntrack_standalone_fini_sysctl(net); | |
555 | nf_conntrack_standalone_fini_proc(net); | |
556 | } | |
557 | nf_conntrack_cleanup_net_list(net_exit_list); | |
dfdb8d79 AD |
558 | } |
559 | ||
560 | static struct pernet_operations nf_conntrack_net_ops = { | |
dece40e8 VD |
561 | .init = nf_conntrack_pernet_init, |
562 | .exit_batch = nf_conntrack_pernet_exit, | |
dfdb8d79 AD |
563 | }; |
564 | ||
65b4b4e8 | 565 | static int __init nf_conntrack_standalone_init(void) |
9fb9cbb1 | 566 | { |
f94161c1 G |
567 | int ret = nf_conntrack_init_start(); |
568 | if (ret < 0) | |
569 | goto out_start; | |
570 | ||
5f9f946b | 571 | #ifdef CONFIG_SYSCTL |
f94161c1 G |
572 | nf_ct_netfilter_header = |
573 | register_net_sysctl(&init_net, "net", nf_ct_netfilter_table); | |
5f9f946b PNA |
574 | if (!nf_ct_netfilter_header) { |
575 | pr_err("nf_conntrack: can't register to sysctl.\n"); | |
5389090b | 576 | ret = -ENOMEM; |
f94161c1 | 577 | goto out_sysctl; |
5f9f946b PNA |
578 | } |
579 | #endif | |
f94161c1 G |
580 | |
581 | ret = register_pernet_subsys(&nf_conntrack_net_ops); | |
582 | if (ret < 0) | |
583 | goto out_pernet; | |
584 | ||
585 | nf_conntrack_init_end(); | |
586 | return 0; | |
587 | ||
588 | out_pernet: | |
5f9f946b | 589 | #ifdef CONFIG_SYSCTL |
f94161c1 G |
590 | unregister_net_sysctl_table(nf_ct_netfilter_header); |
591 | out_sysctl: | |
5f9f946b | 592 | #endif |
f94161c1 G |
593 | nf_conntrack_cleanup_end(); |
594 | out_start: | |
595 | return ret; | |
9fb9cbb1 YK |
596 | } |
597 | ||
65b4b4e8 | 598 | static void __exit nf_conntrack_standalone_fini(void) |
9fb9cbb1 | 599 | { |
f94161c1 | 600 | nf_conntrack_cleanup_start(); |
dfdb8d79 | 601 | unregister_pernet_subsys(&nf_conntrack_net_ops); |
5f9f946b | 602 | #ifdef CONFIG_SYSCTL |
f94161c1 | 603 | unregister_net_sysctl_table(nf_ct_netfilter_header); |
5f9f946b | 604 | #endif |
1e47ee83 | 605 | nf_conntrack_cleanup_end(); |
9fb9cbb1 YK |
606 | } |
607 | ||
65b4b4e8 AM |
608 | module_init(nf_conntrack_standalone_init); |
609 | module_exit(nf_conntrack_standalone_fini); | |
9fb9cbb1 YK |
610 | |
611 | /* Some modules need us, but don't depend directly on any symbol. | |
612 | They should call this. */ | |
2e4e6a17 | 613 | void need_conntrack(void) |
9fb9cbb1 YK |
614 | { |
615 | } | |
13b18339 | 616 | EXPORT_SYMBOL_GPL(need_conntrack); |