Commit | Line | Data |
---|---|---|
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 YK |
56 | { |
57 | struct ct_iter_state *st = seq->private; | |
ea781f19 | 58 | struct hlist_nulls_node *n; |
9fb9cbb1 YK |
59 | |
60 | for (st->bucket = 0; | |
56d52d48 | 61 | st->bucket < nf_conntrack_htable_size; |
9fb9cbb1 | 62 | st->bucket++) { |
56d52d48 | 63 | n = rcu_dereference(hlist_nulls_first_rcu(&nf_conntrack_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 YK |
72 | { |
73 | struct ct_iter_state *st = seq->private; | |
74 | ||
0e60ebe0 | 75 | head = rcu_dereference(hlist_nulls_next_rcu(head)); |
ea781f19 ED |
76 | while (is_a_nulls(head)) { |
77 | if (likely(get_nulls_value(head) == st->bucket)) { | |
56d52d48 | 78 | if (++st->bucket >= nf_conntrack_htable_size) |
ea781f19 ED |
79 | return NULL; |
80 | } | |
0e60ebe0 ED |
81 | head = rcu_dereference( |
82 | hlist_nulls_first_rcu( | |
56d52d48 | 83 | &nf_conntrack_hash[st->bucket])); |
9fb9cbb1 YK |
84 | } |
85 | return head; | |
86 | } | |
87 | ||
ea781f19 | 88 | static struct hlist_nulls_node *ct_get_idx(struct seq_file *seq, loff_t pos) |
9fb9cbb1 | 89 | { |
ea781f19 | 90 | struct hlist_nulls_node *head = ct_get_first(seq); |
9fb9cbb1 YK |
91 | |
92 | if (head) | |
93 | while (pos && (head = ct_get_next(seq, head))) | |
94 | pos--; | |
95 | return pos ? NULL : head; | |
96 | } | |
97 | ||
98 | static void *ct_seq_start(struct seq_file *seq, loff_t *pos) | |
76507f69 | 99 | __acquires(RCU) |
9fb9cbb1 | 100 | { |
a992ca2a PNA |
101 | struct ct_iter_state *st = seq->private; |
102 | ||
d2de875c | 103 | st->time_now = ktime_get_real_ns(); |
76507f69 | 104 | rcu_read_lock(); |
9fb9cbb1 YK |
105 | return ct_get_idx(seq, *pos); |
106 | } | |
107 | ||
108 | static void *ct_seq_next(struct seq_file *s, void *v, loff_t *pos) | |
109 | { | |
110 | (*pos)++; | |
111 | return ct_get_next(s, v); | |
112 | } | |
113 | ||
114 | static void ct_seq_stop(struct seq_file *s, void *v) | |
76507f69 | 115 | __releases(RCU) |
9fb9cbb1 | 116 | { |
76507f69 | 117 | rcu_read_unlock(); |
9fb9cbb1 YK |
118 | } |
119 | ||
1ae4de0c | 120 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
e71456ae | 121 | static void ct_show_secctx(struct seq_file *s, const struct nf_conn *ct) |
1ae4de0c EP |
122 | { |
123 | int ret; | |
124 | u32 len; | |
125 | char *secctx; | |
126 | ||
127 | ret = security_secid_to_secctx(ct->secmark, &secctx, &len); | |
128 | if (ret) | |
e71456ae | 129 | return; |
1ae4de0c | 130 | |
e71456ae | 131 | seq_printf(s, "secctx=%s ", secctx); |
1ae4de0c EP |
132 | |
133 | security_release_secctx(secctx, len); | |
1ae4de0c EP |
134 | } |
135 | #else | |
e71456ae | 136 | static inline void ct_show_secctx(struct seq_file *s, const struct nf_conn *ct) |
1ae4de0c | 137 | { |
1ae4de0c EP |
138 | } |
139 | #endif | |
140 | ||
308ac914 | 141 | #ifdef CONFIG_NF_CONNTRACK_ZONES |
deedb590 DB |
142 | static void ct_show_zone(struct seq_file *s, const struct nf_conn *ct, |
143 | int dir) | |
308ac914 | 144 | { |
deedb590 DB |
145 | const struct nf_conntrack_zone *zone = nf_ct_zone(ct); |
146 | ||
147 | if (zone->dir != dir) | |
148 | return; | |
149 | switch (zone->dir) { | |
150 | case NF_CT_DEFAULT_ZONE_DIR: | |
151 | seq_printf(s, "zone=%u ", zone->id); | |
152 | break; | |
153 | case NF_CT_ZONE_DIR_ORIG: | |
154 | seq_printf(s, "zone-orig=%u ", zone->id); | |
155 | break; | |
156 | case NF_CT_ZONE_DIR_REPL: | |
157 | seq_printf(s, "zone-reply=%u ", zone->id); | |
158 | break; | |
159 | default: | |
160 | break; | |
161 | } | |
308ac914 DB |
162 | } |
163 | #else | |
deedb590 DB |
164 | static inline void ct_show_zone(struct seq_file *s, const struct nf_conn *ct, |
165 | int dir) | |
308ac914 DB |
166 | { |
167 | } | |
168 | #endif | |
169 | ||
a992ca2a | 170 | #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP |
e71456ae | 171 | static void ct_show_delta_time(struct seq_file *s, const struct nf_conn *ct) |
a992ca2a | 172 | { |
f5c88f56 | 173 | struct ct_iter_state *st = s->private; |
a992ca2a | 174 | struct nf_conn_tstamp *tstamp; |
f5c88f56 | 175 | s64 delta_time; |
a992ca2a PNA |
176 | |
177 | tstamp = nf_conn_tstamp_find(ct); | |
178 | if (tstamp) { | |
f5c88f56 PM |
179 | delta_time = st->time_now - tstamp->start; |
180 | if (delta_time > 0) | |
181 | delta_time = div_s64(delta_time, NSEC_PER_SEC); | |
182 | else | |
183 | delta_time = 0; | |
184 | ||
e71456ae SRRH |
185 | seq_printf(s, "delta-time=%llu ", |
186 | (unsigned long long)delta_time); | |
a992ca2a | 187 | } |
e71456ae | 188 | return; |
a992ca2a PNA |
189 | } |
190 | #else | |
e71456ae | 191 | static inline void |
a992ca2a PNA |
192 | ct_show_delta_time(struct seq_file *s, const struct nf_conn *ct) |
193 | { | |
a992ca2a PNA |
194 | } |
195 | #endif | |
196 | ||
9fb9cbb1 YK |
197 | /* return 0 on success, 1 in case of error */ |
198 | static int ct_seq_show(struct seq_file *s, void *v) | |
199 | { | |
ea781f19 ED |
200 | struct nf_conntrack_tuple_hash *hash = v; |
201 | struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(hash); | |
32948588 JE |
202 | const struct nf_conntrack_l3proto *l3proto; |
203 | const struct nf_conntrack_l4proto *l4proto; | |
ea781f19 | 204 | int ret = 0; |
9fb9cbb1 | 205 | |
c88130bc | 206 | NF_CT_ASSERT(ct); |
ea781f19 ED |
207 | if (unlikely(!atomic_inc_not_zero(&ct->ct_general.use))) |
208 | return 0; | |
9fb9cbb1 YK |
209 | |
210 | /* we only want to print DIR_ORIGINAL */ | |
211 | if (NF_CT_DIRECTION(hash)) | |
ea781f19 | 212 | goto release; |
9fb9cbb1 | 213 | |
5e8fbe2a | 214 | l3proto = __nf_ct_l3proto_find(nf_ct_l3num(ct)); |
9fb9cbb1 | 215 | NF_CT_ASSERT(l3proto); |
5e8fbe2a | 216 | l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct)); |
605dcad6 | 217 | NF_CT_ASSERT(l4proto); |
9fb9cbb1 | 218 | |
ea781f19 | 219 | ret = -ENOSPC; |
e71456ae SRRH |
220 | seq_printf(s, "%-8s %u %-8s %u %ld ", |
221 | l3proto->name, nf_ct_l3num(ct), | |
222 | l4proto->name, nf_ct_protonum(ct), | |
223 | timer_pending(&ct->timeout) | |
224 | ? (long)(ct->timeout.expires - jiffies)/HZ : 0); | |
9fb9cbb1 | 225 | |
37246a58 SRRH |
226 | if (l4proto->print_conntrack) |
227 | l4proto->print_conntrack(s, ct); | |
9fb9cbb1 | 228 | |
824f1fbe JP |
229 | print_tuple(s, &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple, |
230 | l3proto, l4proto); | |
9fb9cbb1 | 231 | |
deedb590 DB |
232 | ct_show_zone(s, ct, NF_CT_ZONE_DIR_ORIG); |
233 | ||
e71456ae SRRH |
234 | if (seq_has_overflowed(s)) |
235 | goto release; | |
236 | ||
58401572 | 237 | if (seq_print_acct(s, ct, IP_CT_DIR_ORIGINAL)) |
ea781f19 | 238 | goto release; |
9fb9cbb1 | 239 | |
c88130bc | 240 | if (!(test_bit(IPS_SEEN_REPLY_BIT, &ct->status))) |
e71456ae | 241 | seq_printf(s, "[UNREPLIED] "); |
9fb9cbb1 | 242 | |
824f1fbe JP |
243 | print_tuple(s, &ct->tuplehash[IP_CT_DIR_REPLY].tuple, |
244 | l3proto, l4proto); | |
9fb9cbb1 | 245 | |
deedb590 DB |
246 | ct_show_zone(s, ct, NF_CT_ZONE_DIR_REPL); |
247 | ||
58401572 | 248 | if (seq_print_acct(s, ct, IP_CT_DIR_REPLY)) |
ea781f19 | 249 | goto release; |
9fb9cbb1 | 250 | |
c88130bc | 251 | if (test_bit(IPS_ASSURED_BIT, &ct->status)) |
e71456ae | 252 | seq_printf(s, "[ASSURED] "); |
9fb9cbb1 | 253 | |
e71456ae | 254 | if (seq_has_overflowed(s)) |
ea781f19 | 255 | goto release; |
e71456ae SRRH |
256 | |
257 | #if defined(CONFIG_NF_CONNTRACK_MARK) | |
258 | seq_printf(s, "mark=%u ", ct->mark); | |
9fb9cbb1 YK |
259 | #endif |
260 | ||
e71456ae | 261 | ct_show_secctx(s, ct); |
deedb590 | 262 | ct_show_zone(s, ct, NF_CT_DEFAULT_ZONE_DIR); |
e71456ae SRRH |
263 | ct_show_delta_time(s, ct); |
264 | ||
265 | seq_printf(s, "use=%u\n", atomic_read(&ct->ct_general.use)); | |
a992ca2a | 266 | |
e71456ae | 267 | if (seq_has_overflowed(s)) |
ea781f19 | 268 | goto release; |
a5d29264 | 269 | |
ea781f19 ED |
270 | ret = 0; |
271 | release: | |
272 | nf_ct_put(ct); | |
d88d7de0 | 273 | return ret; |
9fb9cbb1 YK |
274 | } |
275 | ||
56b3d975 | 276 | static const struct seq_operations ct_seq_ops = { |
9fb9cbb1 YK |
277 | .start = ct_seq_start, |
278 | .next = ct_seq_next, | |
279 | .stop = ct_seq_stop, | |
280 | .show = ct_seq_show | |
281 | }; | |
282 | ||
283 | static int ct_open(struct inode *inode, struct file *file) | |
284 | { | |
b2ce2c74 | 285 | return seq_open_net(inode, file, &ct_seq_ops, |
e2da5913 | 286 | sizeof(struct ct_iter_state)); |
9fb9cbb1 YK |
287 | } |
288 | ||
da7071d7 | 289 | static const struct file_operations ct_file_ops = { |
9fb9cbb1 YK |
290 | .owner = THIS_MODULE, |
291 | .open = ct_open, | |
292 | .read = seq_read, | |
293 | .llseek = seq_lseek, | |
b2ce2c74 | 294 | .release = seq_release_net, |
9fb9cbb1 YK |
295 | }; |
296 | ||
9fb9cbb1 YK |
297 | static void *ct_cpu_seq_start(struct seq_file *seq, loff_t *pos) |
298 | { | |
8e9df801 | 299 | struct net *net = seq_file_net(seq); |
9fb9cbb1 YK |
300 | int cpu; |
301 | ||
302 | if (*pos == 0) | |
303 | return SEQ_START_TOKEN; | |
304 | ||
0f23174a | 305 | for (cpu = *pos-1; cpu < nr_cpu_ids; ++cpu) { |
9fb9cbb1 YK |
306 | if (!cpu_possible(cpu)) |
307 | continue; | |
308 | *pos = cpu + 1; | |
8e9df801 | 309 | return per_cpu_ptr(net->ct.stat, cpu); |
9fb9cbb1 YK |
310 | } |
311 | ||
312 | return NULL; | |
313 | } | |
314 | ||
315 | static void *ct_cpu_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
316 | { | |
8e9df801 | 317 | struct net *net = seq_file_net(seq); |
9fb9cbb1 YK |
318 | int cpu; |
319 | ||
0f23174a | 320 | for (cpu = *pos; cpu < nr_cpu_ids; ++cpu) { |
9fb9cbb1 YK |
321 | if (!cpu_possible(cpu)) |
322 | continue; | |
323 | *pos = cpu + 1; | |
8e9df801 | 324 | return per_cpu_ptr(net->ct.stat, cpu); |
9fb9cbb1 YK |
325 | } |
326 | ||
327 | return NULL; | |
328 | } | |
329 | ||
330 | static void ct_cpu_seq_stop(struct seq_file *seq, void *v) | |
331 | { | |
332 | } | |
333 | ||
334 | static int ct_cpu_seq_show(struct seq_file *seq, void *v) | |
335 | { | |
8e9df801 AD |
336 | struct net *net = seq_file_net(seq); |
337 | unsigned int nr_conntracks = atomic_read(&net->ct.count); | |
32948588 | 338 | const struct ip_conntrack_stat *st = v; |
9fb9cbb1 YK |
339 | |
340 | if (v == SEQ_START_TOKEN) { | |
af740b2c | 341 | 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 |
342 | return 0; |
343 | } | |
344 | ||
345 | seq_printf(seq, "%08x %08x %08x %08x %08x %08x %08x %08x " | |
af740b2c | 346 | "%08x %08x %08x %08x %08x %08x %08x %08x %08x\n", |
9fb9cbb1 YK |
347 | nr_conntracks, |
348 | st->searched, | |
349 | st->found, | |
350 | st->new, | |
351 | st->invalid, | |
352 | st->ignore, | |
353 | st->delete, | |
354 | st->delete_list, | |
355 | st->insert, | |
356 | st->insert_failed, | |
357 | st->drop, | |
358 | st->early_drop, | |
359 | st->error, | |
360 | ||
361 | st->expect_new, | |
362 | st->expect_create, | |
af740b2c JDB |
363 | st->expect_delete, |
364 | st->search_restart | |
9fb9cbb1 YK |
365 | ); |
366 | return 0; | |
367 | } | |
368 | ||
56b3d975 | 369 | static const struct seq_operations ct_cpu_seq_ops = { |
9fb9cbb1 YK |
370 | .start = ct_cpu_seq_start, |
371 | .next = ct_cpu_seq_next, | |
372 | .stop = ct_cpu_seq_stop, | |
373 | .show = ct_cpu_seq_show, | |
374 | }; | |
375 | ||
376 | static int ct_cpu_seq_open(struct inode *inode, struct file *file) | |
377 | { | |
8e9df801 AD |
378 | return seq_open_net(inode, file, &ct_cpu_seq_ops, |
379 | sizeof(struct seq_net_private)); | |
9fb9cbb1 YK |
380 | } |
381 | ||
da7071d7 | 382 | static const struct file_operations ct_cpu_seq_fops = { |
9fb9cbb1 YK |
383 | .owner = THIS_MODULE, |
384 | .open = ct_cpu_seq_open, | |
385 | .read = seq_read, | |
386 | .llseek = seq_lseek, | |
8e9df801 | 387 | .release = seq_release_net, |
9fb9cbb1 | 388 | }; |
b916f7d4 | 389 | |
b2ce2c74 | 390 | static int nf_conntrack_standalone_init_proc(struct net *net) |
b916f7d4 AD |
391 | { |
392 | struct proc_dir_entry *pde; | |
f13f2aee PW |
393 | kuid_t root_uid; |
394 | kgid_t root_gid; | |
b916f7d4 | 395 | |
d4beaa66 | 396 | pde = proc_create("nf_conntrack", 0440, net->proc_net, &ct_file_ops); |
b916f7d4 AD |
397 | if (!pde) |
398 | goto out_nf_conntrack; | |
52c0e111 | 399 | |
f13f2aee PW |
400 | root_uid = make_kuid(net->user_ns, 0); |
401 | root_gid = make_kgid(net->user_ns, 0); | |
402 | if (uid_valid(root_uid) && gid_valid(root_gid)) | |
403 | proc_set_user(pde, root_uid, root_gid); | |
404 | ||
b2ce2c74 | 405 | pde = proc_create("nf_conntrack", S_IRUGO, net->proc_net_stat, |
52c0e111 | 406 | &ct_cpu_seq_fops); |
b916f7d4 AD |
407 | if (!pde) |
408 | goto out_stat_nf_conntrack; | |
b916f7d4 AD |
409 | return 0; |
410 | ||
411 | out_stat_nf_conntrack: | |
ece31ffd | 412 | remove_proc_entry("nf_conntrack", net->proc_net); |
b916f7d4 AD |
413 | out_nf_conntrack: |
414 | return -ENOMEM; | |
415 | } | |
416 | ||
b2ce2c74 | 417 | static void nf_conntrack_standalone_fini_proc(struct net *net) |
b916f7d4 | 418 | { |
b2ce2c74 | 419 | remove_proc_entry("nf_conntrack", net->proc_net_stat); |
ece31ffd | 420 | remove_proc_entry("nf_conntrack", net->proc_net); |
b916f7d4 AD |
421 | } |
422 | #else | |
b2ce2c74 | 423 | static int nf_conntrack_standalone_init_proc(struct net *net) |
b916f7d4 AD |
424 | { |
425 | return 0; | |
426 | } | |
427 | ||
b2ce2c74 | 428 | static void nf_conntrack_standalone_fini_proc(struct net *net) |
b916f7d4 AD |
429 | { |
430 | } | |
54b07dca | 431 | #endif /* CONFIG_NF_CONNTRACK_PROCFS */ |
9fb9cbb1 YK |
432 | |
433 | /* Sysctl support */ | |
434 | ||
435 | #ifdef CONFIG_SYSCTL | |
9fb9cbb1 | 436 | /* Log invalid packets of a given protocol */ |
3183ab89 FW |
437 | static int log_invalid_proto_min __read_mostly; |
438 | static int log_invalid_proto_max __read_mostly = 255; | |
439 | ||
440 | /* size the user *wants to set */ | |
441 | static unsigned int nf_conntrack_htable_size_user __read_mostly; | |
442 | ||
443 | static int | |
444 | nf_conntrack_hash_sysctl(struct ctl_table *table, int write, | |
445 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
446 | { | |
447 | int ret; | |
448 | ||
449 | ret = proc_dointvec(table, write, buffer, lenp, ppos); | |
450 | if (ret < 0 || !write) | |
451 | return ret; | |
452 | ||
453 | /* update ret, we might not be able to satisfy request */ | |
454 | ret = nf_conntrack_hash_resize(nf_conntrack_htable_size_user); | |
455 | ||
456 | /* update it to the actual value used by conntrack */ | |
457 | nf_conntrack_htable_size_user = nf_conntrack_htable_size; | |
458 | return ret; | |
459 | } | |
9fb9cbb1 | 460 | |
9714be7d | 461 | static struct ctl_table_header *nf_ct_netfilter_header; |
9fb9cbb1 | 462 | |
fe2c6338 | 463 | static struct ctl_table nf_ct_sysctl_table[] = { |
9fb9cbb1 | 464 | { |
9fb9cbb1 YK |
465 | .procname = "nf_conntrack_max", |
466 | .data = &nf_conntrack_max, | |
467 | .maxlen = sizeof(int), | |
468 | .mode = 0644, | |
6d9f239a | 469 | .proc_handler = proc_dointvec, |
9fb9cbb1 YK |
470 | }, |
471 | { | |
9fb9cbb1 | 472 | .procname = "nf_conntrack_count", |
49ac8713 | 473 | .data = &init_net.ct.count, |
9fb9cbb1 YK |
474 | .maxlen = sizeof(int), |
475 | .mode = 0444, | |
6d9f239a | 476 | .proc_handler = proc_dointvec, |
9fb9cbb1 YK |
477 | }, |
478 | { | |
9fb9cbb1 | 479 | .procname = "nf_conntrack_buckets", |
3183ab89 | 480 | .data = &nf_conntrack_htable_size_user, |
9fb9cbb1 | 481 | .maxlen = sizeof(unsigned int), |
3183ab89 FW |
482 | .mode = 0644, |
483 | .proc_handler = nf_conntrack_hash_sysctl, | |
9fb9cbb1 | 484 | }, |
39a27a35 | 485 | { |
39a27a35 | 486 | .procname = "nf_conntrack_checksum", |
c04d0552 | 487 | .data = &init_net.ct.sysctl_checksum, |
39a27a35 PM |
488 | .maxlen = sizeof(unsigned int), |
489 | .mode = 0644, | |
6d9f239a | 490 | .proc_handler = proc_dointvec, |
39a27a35 | 491 | }, |
9fb9cbb1 | 492 | { |
9fb9cbb1 | 493 | .procname = "nf_conntrack_log_invalid", |
c2a2c7e0 | 494 | .data = &init_net.ct.sysctl_log_invalid, |
9fb9cbb1 YK |
495 | .maxlen = sizeof(unsigned int), |
496 | .mode = 0644, | |
6d9f239a | 497 | .proc_handler = proc_dointvec_minmax, |
9fb9cbb1 YK |
498 | .extra1 = &log_invalid_proto_min, |
499 | .extra2 = &log_invalid_proto_max, | |
500 | }, | |
f264a7df | 501 | { |
f264a7df PM |
502 | .procname = "nf_conntrack_expect_max", |
503 | .data = &nf_ct_expect_max, | |
504 | .maxlen = sizeof(int), | |
505 | .mode = 0644, | |
6d9f239a | 506 | .proc_handler = proc_dointvec, |
f264a7df | 507 | }, |
f8572d8f | 508 | { } |
9fb9cbb1 YK |
509 | }; |
510 | ||
fe2c6338 | 511 | static struct ctl_table nf_ct_netfilter_table[] = { |
9fb9cbb1 | 512 | { |
9fb9cbb1 YK |
513 | .procname = "nf_conntrack_max", |
514 | .data = &nf_conntrack_max, | |
515 | .maxlen = sizeof(int), | |
516 | .mode = 0644, | |
6d9f239a | 517 | .proc_handler = proc_dointvec, |
9fb9cbb1 | 518 | }, |
f8572d8f | 519 | { } |
9fb9cbb1 YK |
520 | }; |
521 | ||
80250707 | 522 | static int nf_conntrack_standalone_init_sysctl(struct net *net) |
b916f7d4 | 523 | { |
80250707 AD |
524 | struct ctl_table *table; |
525 | ||
80250707 AD |
526 | table = kmemdup(nf_ct_sysctl_table, sizeof(nf_ct_sysctl_table), |
527 | GFP_KERNEL); | |
528 | if (!table) | |
529 | goto out_kmemdup; | |
530 | ||
531 | table[1].data = &net->ct.count; | |
c04d0552 | 532 | table[3].data = &net->ct.sysctl_checksum; |
c2a2c7e0 | 533 | table[4].data = &net->ct.sysctl_log_invalid; |
80250707 | 534 | |
464dc801 EB |
535 | /* Don't export sysctls to unprivileged users */ |
536 | if (net->user_ns != &init_user_ns) | |
537 | table[0].procname = NULL; | |
538 | ||
3183ab89 FW |
539 | if (!net_eq(&init_net, net)) |
540 | table[2].mode = 0444; | |
541 | ||
ec8f23ce | 542 | net->ct.sysctl_header = register_net_sysctl(net, "net/netfilter", table); |
80250707 | 543 | if (!net->ct.sysctl_header) |
9714be7d KPO |
544 | goto out_unregister_netfilter; |
545 | ||
b916f7d4 AD |
546 | return 0; |
547 | ||
9714be7d | 548 | out_unregister_netfilter: |
80250707 AD |
549 | kfree(table); |
550 | out_kmemdup: | |
9714be7d | 551 | return -ENOMEM; |
b916f7d4 AD |
552 | } |
553 | ||
80250707 | 554 | static void nf_conntrack_standalone_fini_sysctl(struct net *net) |
b916f7d4 | 555 | { |
80250707 AD |
556 | struct ctl_table *table; |
557 | ||
80250707 AD |
558 | table = net->ct.sysctl_header->ctl_table_arg; |
559 | unregister_net_sysctl_table(net->ct.sysctl_header); | |
560 | kfree(table); | |
b916f7d4 AD |
561 | } |
562 | #else | |
80250707 | 563 | static int nf_conntrack_standalone_init_sysctl(struct net *net) |
b916f7d4 AD |
564 | { |
565 | return 0; | |
566 | } | |
567 | ||
80250707 | 568 | static void nf_conntrack_standalone_fini_sysctl(struct net *net) |
b916f7d4 AD |
569 | { |
570 | } | |
9fb9cbb1 YK |
571 | #endif /* CONFIG_SYSCTL */ |
572 | ||
f94161c1 | 573 | static int nf_conntrack_pernet_init(struct net *net) |
dfdb8d79 | 574 | { |
b2ce2c74 AD |
575 | int ret; |
576 | ||
f94161c1 | 577 | ret = nf_conntrack_init_net(net); |
b2ce2c74 AD |
578 | if (ret < 0) |
579 | goto out_init; | |
f94161c1 | 580 | |
b2ce2c74 AD |
581 | ret = nf_conntrack_standalone_init_proc(net); |
582 | if (ret < 0) | |
583 | goto out_proc; | |
f94161c1 | 584 | |
c04d0552 | 585 | net->ct.sysctl_checksum = 1; |
c2a2c7e0 | 586 | net->ct.sysctl_log_invalid = 0; |
80250707 AD |
587 | ret = nf_conntrack_standalone_init_sysctl(net); |
588 | if (ret < 0) | |
589 | goto out_sysctl; | |
f94161c1 | 590 | |
b2ce2c74 AD |
591 | return 0; |
592 | ||
80250707 AD |
593 | out_sysctl: |
594 | nf_conntrack_standalone_fini_proc(net); | |
b2ce2c74 | 595 | out_proc: |
f94161c1 | 596 | nf_conntrack_cleanup_net(net); |
b2ce2c74 AD |
597 | out_init: |
598 | return ret; | |
dfdb8d79 AD |
599 | } |
600 | ||
dece40e8 | 601 | static void nf_conntrack_pernet_exit(struct list_head *net_exit_list) |
dfdb8d79 | 602 | { |
dece40e8 VD |
603 | struct net *net; |
604 | ||
605 | list_for_each_entry(net, net_exit_list, exit_list) { | |
606 | nf_conntrack_standalone_fini_sysctl(net); | |
607 | nf_conntrack_standalone_fini_proc(net); | |
608 | } | |
609 | nf_conntrack_cleanup_net_list(net_exit_list); | |
dfdb8d79 AD |
610 | } |
611 | ||
612 | static struct pernet_operations nf_conntrack_net_ops = { | |
dece40e8 VD |
613 | .init = nf_conntrack_pernet_init, |
614 | .exit_batch = nf_conntrack_pernet_exit, | |
dfdb8d79 AD |
615 | }; |
616 | ||
65b4b4e8 | 617 | static int __init nf_conntrack_standalone_init(void) |
9fb9cbb1 | 618 | { |
f94161c1 G |
619 | int ret = nf_conntrack_init_start(); |
620 | if (ret < 0) | |
621 | goto out_start; | |
622 | ||
5f9f946b | 623 | #ifdef CONFIG_SYSCTL |
f94161c1 G |
624 | nf_ct_netfilter_header = |
625 | register_net_sysctl(&init_net, "net", nf_ct_netfilter_table); | |
5f9f946b PNA |
626 | if (!nf_ct_netfilter_header) { |
627 | pr_err("nf_conntrack: can't register to sysctl.\n"); | |
5389090b | 628 | ret = -ENOMEM; |
f94161c1 | 629 | goto out_sysctl; |
5f9f946b | 630 | } |
3183ab89 FW |
631 | |
632 | nf_conntrack_htable_size_user = nf_conntrack_htable_size; | |
5f9f946b | 633 | #endif |
f94161c1 G |
634 | |
635 | ret = register_pernet_subsys(&nf_conntrack_net_ops); | |
636 | if (ret < 0) | |
637 | goto out_pernet; | |
638 | ||
639 | nf_conntrack_init_end(); | |
640 | return 0; | |
641 | ||
642 | out_pernet: | |
5f9f946b | 643 | #ifdef CONFIG_SYSCTL |
f94161c1 G |
644 | unregister_net_sysctl_table(nf_ct_netfilter_header); |
645 | out_sysctl: | |
5f9f946b | 646 | #endif |
f94161c1 G |
647 | nf_conntrack_cleanup_end(); |
648 | out_start: | |
649 | return ret; | |
9fb9cbb1 YK |
650 | } |
651 | ||
65b4b4e8 | 652 | static void __exit nf_conntrack_standalone_fini(void) |
9fb9cbb1 | 653 | { |
f94161c1 | 654 | nf_conntrack_cleanup_start(); |
dfdb8d79 | 655 | unregister_pernet_subsys(&nf_conntrack_net_ops); |
5f9f946b | 656 | #ifdef CONFIG_SYSCTL |
f94161c1 | 657 | unregister_net_sysctl_table(nf_ct_netfilter_header); |
5f9f946b | 658 | #endif |
1e47ee83 | 659 | nf_conntrack_cleanup_end(); |
9fb9cbb1 YK |
660 | } |
661 | ||
65b4b4e8 AM |
662 | module_init(nf_conntrack_standalone_init); |
663 | module_exit(nf_conntrack_standalone_fini); | |
9fb9cbb1 YK |
664 | |
665 | /* Some modules need us, but don't depend directly on any symbol. | |
666 | They should call this. */ | |
2e4e6a17 | 667 | void need_conntrack(void) |
9fb9cbb1 YK |
668 | { |
669 | } | |
13b18339 | 670 | EXPORT_SYMBOL_GPL(need_conntrack); |