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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 |
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 | { |
91950833 FW |
44 | switch (l3proto->l3proto) { |
45 | case NFPROTO_IPV4: | |
46 | seq_printf(s, "src=%pI4 dst=%pI4 ", | |
47 | &tuple->src.u3.ip, &tuple->dst.u3.ip); | |
48 | break; | |
49 | case NFPROTO_IPV6: | |
50 | seq_printf(s, "src=%pI6 dst=%pI6 ", | |
51 | tuple->src.u3.ip6, tuple->dst.u3.ip6); | |
52 | break; | |
53 | default: | |
54 | break; | |
55 | } | |
56 | ||
57 | switch (l4proto->l4proto) { | |
58 | case IPPROTO_ICMP: | |
59 | seq_printf(s, "type=%u code=%u id=%u ", | |
60 | tuple->dst.u.icmp.type, | |
61 | tuple->dst.u.icmp.code, | |
62 | ntohs(tuple->src.u.icmp.id)); | |
63 | break; | |
64 | case IPPROTO_TCP: | |
65 | seq_printf(s, "sport=%hu dport=%hu ", | |
66 | ntohs(tuple->src.u.tcp.port), | |
67 | ntohs(tuple->dst.u.tcp.port)); | |
68 | break; | |
69 | case IPPROTO_UDPLITE: /* fallthrough */ | |
70 | case IPPROTO_UDP: | |
71 | seq_printf(s, "sport=%hu dport=%hu ", | |
72 | ntohs(tuple->src.u.udp.port), | |
73 | ntohs(tuple->dst.u.udp.port)); | |
74 | ||
75 | break; | |
76 | case IPPROTO_DCCP: | |
77 | seq_printf(s, "sport=%hu dport=%hu ", | |
78 | ntohs(tuple->src.u.dccp.port), | |
79 | ntohs(tuple->dst.u.dccp.port)); | |
80 | break; | |
81 | case IPPROTO_SCTP: | |
82 | seq_printf(s, "sport=%hu dport=%hu ", | |
83 | ntohs(tuple->src.u.sctp.port), | |
84 | ntohs(tuple->dst.u.sctp.port)); | |
85 | break; | |
86 | case IPPROTO_ICMPV6: | |
87 | seq_printf(s, "type=%u code=%u id=%u ", | |
88 | tuple->dst.u.icmp.type, | |
89 | tuple->dst.u.icmp.code, | |
90 | ntohs(tuple->src.u.icmp.id)); | |
91 | break; | |
92 | case IPPROTO_GRE: | |
93 | seq_printf(s, "srckey=0x%x dstkey=0x%x ", | |
94 | ntohs(tuple->src.u.gre.key), | |
95 | ntohs(tuple->dst.u.gre.key)); | |
96 | break; | |
97 | default: | |
98 | break; | |
99 | } | |
9fb9cbb1 | 100 | } |
e4bd8bce | 101 | EXPORT_SYMBOL_GPL(print_tuple); |
9fb9cbb1 | 102 | |
9fb9cbb1 | 103 | struct ct_iter_state { |
b2ce2c74 | 104 | struct seq_net_private p; |
64b87639 LZ |
105 | struct hlist_nulls_head *hash; |
106 | unsigned int htable_size; | |
9fb9cbb1 | 107 | unsigned int bucket; |
a992ca2a | 108 | u_int64_t time_now; |
9fb9cbb1 YK |
109 | }; |
110 | ||
ea781f19 | 111 | static struct hlist_nulls_node *ct_get_first(struct seq_file *seq) |
9fb9cbb1 YK |
112 | { |
113 | struct ct_iter_state *st = seq->private; | |
ea781f19 | 114 | struct hlist_nulls_node *n; |
9fb9cbb1 YK |
115 | |
116 | for (st->bucket = 0; | |
64b87639 | 117 | st->bucket < st->htable_size; |
9fb9cbb1 | 118 | st->bucket++) { |
64b87639 LZ |
119 | n = rcu_dereference( |
120 | hlist_nulls_first_rcu(&st->hash[st->bucket])); | |
ea781f19 | 121 | if (!is_a_nulls(n)) |
76507f69 | 122 | return n; |
9fb9cbb1 YK |
123 | } |
124 | return NULL; | |
125 | } | |
126 | ||
ea781f19 ED |
127 | static struct hlist_nulls_node *ct_get_next(struct seq_file *seq, |
128 | struct hlist_nulls_node *head) | |
9fb9cbb1 YK |
129 | { |
130 | struct ct_iter_state *st = seq->private; | |
131 | ||
0e60ebe0 | 132 | head = rcu_dereference(hlist_nulls_next_rcu(head)); |
ea781f19 ED |
133 | while (is_a_nulls(head)) { |
134 | if (likely(get_nulls_value(head) == st->bucket)) { | |
64b87639 | 135 | if (++st->bucket >= st->htable_size) |
ea781f19 ED |
136 | return NULL; |
137 | } | |
0e60ebe0 | 138 | head = rcu_dereference( |
64b87639 | 139 | hlist_nulls_first_rcu(&st->hash[st->bucket])); |
9fb9cbb1 YK |
140 | } |
141 | return head; | |
142 | } | |
143 | ||
ea781f19 | 144 | static struct hlist_nulls_node *ct_get_idx(struct seq_file *seq, loff_t pos) |
9fb9cbb1 | 145 | { |
ea781f19 | 146 | struct hlist_nulls_node *head = ct_get_first(seq); |
9fb9cbb1 YK |
147 | |
148 | if (head) | |
149 | while (pos && (head = ct_get_next(seq, head))) | |
150 | pos--; | |
151 | return pos ? NULL : head; | |
152 | } | |
153 | ||
154 | static void *ct_seq_start(struct seq_file *seq, loff_t *pos) | |
76507f69 | 155 | __acquires(RCU) |
9fb9cbb1 | 156 | { |
a992ca2a PNA |
157 | struct ct_iter_state *st = seq->private; |
158 | ||
d2de875c | 159 | st->time_now = ktime_get_real_ns(); |
76507f69 | 160 | rcu_read_lock(); |
64b87639 LZ |
161 | |
162 | nf_conntrack_get_ht(&st->hash, &st->htable_size); | |
9fb9cbb1 YK |
163 | return ct_get_idx(seq, *pos); |
164 | } | |
165 | ||
166 | static void *ct_seq_next(struct seq_file *s, void *v, loff_t *pos) | |
167 | { | |
168 | (*pos)++; | |
169 | return ct_get_next(s, v); | |
170 | } | |
171 | ||
172 | static void ct_seq_stop(struct seq_file *s, void *v) | |
76507f69 | 173 | __releases(RCU) |
9fb9cbb1 | 174 | { |
76507f69 | 175 | rcu_read_unlock(); |
9fb9cbb1 YK |
176 | } |
177 | ||
1ae4de0c | 178 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
e71456ae | 179 | static void ct_show_secctx(struct seq_file *s, const struct nf_conn *ct) |
1ae4de0c EP |
180 | { |
181 | int ret; | |
182 | u32 len; | |
183 | char *secctx; | |
184 | ||
185 | ret = security_secid_to_secctx(ct->secmark, &secctx, &len); | |
186 | if (ret) | |
e71456ae | 187 | return; |
1ae4de0c | 188 | |
e71456ae | 189 | seq_printf(s, "secctx=%s ", secctx); |
1ae4de0c EP |
190 | |
191 | security_release_secctx(secctx, len); | |
1ae4de0c EP |
192 | } |
193 | #else | |
e71456ae | 194 | static inline void ct_show_secctx(struct seq_file *s, const struct nf_conn *ct) |
1ae4de0c | 195 | { |
1ae4de0c EP |
196 | } |
197 | #endif | |
198 | ||
308ac914 | 199 | #ifdef CONFIG_NF_CONNTRACK_ZONES |
deedb590 DB |
200 | static void ct_show_zone(struct seq_file *s, const struct nf_conn *ct, |
201 | int dir) | |
308ac914 | 202 | { |
deedb590 DB |
203 | const struct nf_conntrack_zone *zone = nf_ct_zone(ct); |
204 | ||
205 | if (zone->dir != dir) | |
206 | return; | |
207 | switch (zone->dir) { | |
208 | case NF_CT_DEFAULT_ZONE_DIR: | |
209 | seq_printf(s, "zone=%u ", zone->id); | |
210 | break; | |
211 | case NF_CT_ZONE_DIR_ORIG: | |
212 | seq_printf(s, "zone-orig=%u ", zone->id); | |
213 | break; | |
214 | case NF_CT_ZONE_DIR_REPL: | |
215 | seq_printf(s, "zone-reply=%u ", zone->id); | |
216 | break; | |
217 | default: | |
218 | break; | |
219 | } | |
308ac914 DB |
220 | } |
221 | #else | |
deedb590 DB |
222 | static inline void ct_show_zone(struct seq_file *s, const struct nf_conn *ct, |
223 | int dir) | |
308ac914 DB |
224 | { |
225 | } | |
226 | #endif | |
227 | ||
a992ca2a | 228 | #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP |
e71456ae | 229 | static void ct_show_delta_time(struct seq_file *s, const struct nf_conn *ct) |
a992ca2a | 230 | { |
f5c88f56 | 231 | struct ct_iter_state *st = s->private; |
a992ca2a | 232 | struct nf_conn_tstamp *tstamp; |
f5c88f56 | 233 | s64 delta_time; |
a992ca2a PNA |
234 | |
235 | tstamp = nf_conn_tstamp_find(ct); | |
236 | if (tstamp) { | |
f5c88f56 PM |
237 | delta_time = st->time_now - tstamp->start; |
238 | if (delta_time > 0) | |
239 | delta_time = div_s64(delta_time, NSEC_PER_SEC); | |
240 | else | |
241 | delta_time = 0; | |
242 | ||
e71456ae SRRH |
243 | seq_printf(s, "delta-time=%llu ", |
244 | (unsigned long long)delta_time); | |
a992ca2a | 245 | } |
e71456ae | 246 | return; |
a992ca2a PNA |
247 | } |
248 | #else | |
e71456ae | 249 | static inline void |
a992ca2a PNA |
250 | ct_show_delta_time(struct seq_file *s, const struct nf_conn *ct) |
251 | { | |
a992ca2a PNA |
252 | } |
253 | #endif | |
254 | ||
a3134d53 FW |
255 | static const char* l3proto_name(u16 proto) |
256 | { | |
257 | switch (proto) { | |
258 | case AF_INET: return "ipv4"; | |
259 | case AF_INET6: return "ipv6"; | |
260 | } | |
261 | ||
262 | return "unknown"; | |
263 | } | |
264 | ||
09ec82f5 FW |
265 | static const char* l4proto_name(u16 proto) |
266 | { | |
267 | switch (proto) { | |
268 | case IPPROTO_ICMP: return "icmp"; | |
269 | case IPPROTO_TCP: return "tcp"; | |
270 | case IPPROTO_UDP: return "udp"; | |
271 | case IPPROTO_DCCP: return "dccp"; | |
272 | case IPPROTO_GRE: return "gre"; | |
273 | case IPPROTO_SCTP: return "sctp"; | |
274 | case IPPROTO_UDPLITE: return "udplite"; | |
275 | } | |
276 | ||
277 | return "unknown"; | |
278 | } | |
279 | ||
9fb9cbb1 YK |
280 | /* return 0 on success, 1 in case of error */ |
281 | static int ct_seq_show(struct seq_file *s, void *v) | |
282 | { | |
ea781f19 ED |
283 | struct nf_conntrack_tuple_hash *hash = v; |
284 | struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(hash); | |
32948588 JE |
285 | const struct nf_conntrack_l3proto *l3proto; |
286 | const struct nf_conntrack_l4proto *l4proto; | |
e77e6ff5 | 287 | struct net *net = seq_file_net(s); |
ea781f19 | 288 | int ret = 0; |
9fb9cbb1 | 289 | |
44d6e2f2 | 290 | WARN_ON(!ct); |
ea781f19 ED |
291 | if (unlikely(!atomic_inc_not_zero(&ct->ct_general.use))) |
292 | return 0; | |
9fb9cbb1 | 293 | |
58e207e4 FW |
294 | if (nf_ct_should_gc(ct)) { |
295 | nf_ct_kill(ct); | |
296 | goto release; | |
297 | } | |
298 | ||
9fb9cbb1 YK |
299 | /* we only want to print DIR_ORIGINAL */ |
300 | if (NF_CT_DIRECTION(hash)) | |
ea781f19 | 301 | goto release; |
9fb9cbb1 | 302 | |
e77e6ff5 LZ |
303 | if (!net_eq(nf_ct_net(ct), net)) |
304 | goto release; | |
305 | ||
5e8fbe2a | 306 | l3proto = __nf_ct_l3proto_find(nf_ct_l3num(ct)); |
44d6e2f2 | 307 | WARN_ON(!l3proto); |
5e8fbe2a | 308 | l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct)); |
44d6e2f2 | 309 | WARN_ON(!l4proto); |
9fb9cbb1 | 310 | |
ea781f19 | 311 | ret = -ENOSPC; |
e71456ae | 312 | seq_printf(s, "%-8s %u %-8s %u %ld ", |
a3134d53 | 313 | l3proto_name(l3proto->l3proto), nf_ct_l3num(ct), |
09ec82f5 | 314 | l4proto_name(l4proto->l4proto), nf_ct_protonum(ct), |
d0b35b93 | 315 | nf_ct_expires(ct) / HZ); |
9fb9cbb1 | 316 | |
37246a58 SRRH |
317 | if (l4proto->print_conntrack) |
318 | l4proto->print_conntrack(s, ct); | |
9fb9cbb1 | 319 | |
824f1fbe JP |
320 | print_tuple(s, &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple, |
321 | l3proto, l4proto); | |
9fb9cbb1 | 322 | |
deedb590 DB |
323 | ct_show_zone(s, ct, NF_CT_ZONE_DIR_ORIG); |
324 | ||
e71456ae SRRH |
325 | if (seq_has_overflowed(s)) |
326 | goto release; | |
327 | ||
58401572 | 328 | if (seq_print_acct(s, ct, IP_CT_DIR_ORIGINAL)) |
ea781f19 | 329 | goto release; |
9fb9cbb1 | 330 | |
c88130bc | 331 | if (!(test_bit(IPS_SEEN_REPLY_BIT, &ct->status))) |
cdec2685 | 332 | seq_puts(s, "[UNREPLIED] "); |
9fb9cbb1 | 333 | |
824f1fbe JP |
334 | print_tuple(s, &ct->tuplehash[IP_CT_DIR_REPLY].tuple, |
335 | l3proto, l4proto); | |
9fb9cbb1 | 336 | |
deedb590 DB |
337 | ct_show_zone(s, ct, NF_CT_ZONE_DIR_REPL); |
338 | ||
58401572 | 339 | if (seq_print_acct(s, ct, IP_CT_DIR_REPLY)) |
ea781f19 | 340 | goto release; |
9fb9cbb1 | 341 | |
c88130bc | 342 | if (test_bit(IPS_ASSURED_BIT, &ct->status)) |
cdec2685 | 343 | seq_puts(s, "[ASSURED] "); |
9fb9cbb1 | 344 | |
e71456ae | 345 | if (seq_has_overflowed(s)) |
ea781f19 | 346 | goto release; |
e71456ae SRRH |
347 | |
348 | #if defined(CONFIG_NF_CONNTRACK_MARK) | |
349 | seq_printf(s, "mark=%u ", ct->mark); | |
9fb9cbb1 YK |
350 | #endif |
351 | ||
e71456ae | 352 | ct_show_secctx(s, ct); |
deedb590 | 353 | ct_show_zone(s, ct, NF_CT_DEFAULT_ZONE_DIR); |
e71456ae SRRH |
354 | ct_show_delta_time(s, ct); |
355 | ||
356 | seq_printf(s, "use=%u\n", atomic_read(&ct->ct_general.use)); | |
a992ca2a | 357 | |
e71456ae | 358 | if (seq_has_overflowed(s)) |
ea781f19 | 359 | goto release; |
a5d29264 | 360 | |
ea781f19 ED |
361 | ret = 0; |
362 | release: | |
363 | nf_ct_put(ct); | |
d88d7de0 | 364 | return ret; |
9fb9cbb1 YK |
365 | } |
366 | ||
56b3d975 | 367 | static const struct seq_operations ct_seq_ops = { |
9fb9cbb1 YK |
368 | .start = ct_seq_start, |
369 | .next = ct_seq_next, | |
370 | .stop = ct_seq_stop, | |
371 | .show = ct_seq_show | |
372 | }; | |
373 | ||
374 | static int ct_open(struct inode *inode, struct file *file) | |
375 | { | |
b2ce2c74 | 376 | return seq_open_net(inode, file, &ct_seq_ops, |
e2da5913 | 377 | sizeof(struct ct_iter_state)); |
9fb9cbb1 YK |
378 | } |
379 | ||
da7071d7 | 380 | static const struct file_operations ct_file_ops = { |
9fb9cbb1 YK |
381 | .owner = THIS_MODULE, |
382 | .open = ct_open, | |
383 | .read = seq_read, | |
384 | .llseek = seq_lseek, | |
b2ce2c74 | 385 | .release = seq_release_net, |
9fb9cbb1 YK |
386 | }; |
387 | ||
9fb9cbb1 YK |
388 | static void *ct_cpu_seq_start(struct seq_file *seq, loff_t *pos) |
389 | { | |
8e9df801 | 390 | struct net *net = seq_file_net(seq); |
9fb9cbb1 YK |
391 | int cpu; |
392 | ||
393 | if (*pos == 0) | |
394 | return SEQ_START_TOKEN; | |
395 | ||
0f23174a | 396 | for (cpu = *pos-1; cpu < nr_cpu_ids; ++cpu) { |
9fb9cbb1 YK |
397 | if (!cpu_possible(cpu)) |
398 | continue; | |
399 | *pos = cpu + 1; | |
8e9df801 | 400 | return per_cpu_ptr(net->ct.stat, cpu); |
9fb9cbb1 YK |
401 | } |
402 | ||
403 | return NULL; | |
404 | } | |
405 | ||
406 | static void *ct_cpu_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
407 | { | |
8e9df801 | 408 | struct net *net = seq_file_net(seq); |
9fb9cbb1 YK |
409 | int cpu; |
410 | ||
0f23174a | 411 | for (cpu = *pos; cpu < nr_cpu_ids; ++cpu) { |
9fb9cbb1 YK |
412 | if (!cpu_possible(cpu)) |
413 | continue; | |
414 | *pos = cpu + 1; | |
8e9df801 | 415 | return per_cpu_ptr(net->ct.stat, cpu); |
9fb9cbb1 YK |
416 | } |
417 | ||
418 | return NULL; | |
419 | } | |
420 | ||
421 | static void ct_cpu_seq_stop(struct seq_file *seq, void *v) | |
422 | { | |
423 | } | |
424 | ||
425 | static int ct_cpu_seq_show(struct seq_file *seq, void *v) | |
426 | { | |
8e9df801 AD |
427 | struct net *net = seq_file_net(seq); |
428 | unsigned int nr_conntracks = atomic_read(&net->ct.count); | |
32948588 | 429 | const struct ip_conntrack_stat *st = v; |
9fb9cbb1 YK |
430 | |
431 | if (v == SEQ_START_TOKEN) { | |
cdec2685 | 432 | seq_puts(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 |
433 | return 0; |
434 | } | |
435 | ||
436 | seq_printf(seq, "%08x %08x %08x %08x %08x %08x %08x %08x " | |
af740b2c | 437 | "%08x %08x %08x %08x %08x %08x %08x %08x %08x\n", |
9fb9cbb1 | 438 | nr_conntracks, |
8e8118f8 | 439 | 0, |
9fb9cbb1 | 440 | st->found, |
8e8118f8 | 441 | 0, |
9fb9cbb1 YK |
442 | st->invalid, |
443 | st->ignore, | |
8e8118f8 FW |
444 | 0, |
445 | 0, | |
9fb9cbb1 YK |
446 | st->insert, |
447 | st->insert_failed, | |
448 | st->drop, | |
449 | st->early_drop, | |
450 | st->error, | |
451 | ||
452 | st->expect_new, | |
453 | st->expect_create, | |
af740b2c JDB |
454 | st->expect_delete, |
455 | st->search_restart | |
9fb9cbb1 YK |
456 | ); |
457 | return 0; | |
458 | } | |
459 | ||
56b3d975 | 460 | static const struct seq_operations ct_cpu_seq_ops = { |
9fb9cbb1 YK |
461 | .start = ct_cpu_seq_start, |
462 | .next = ct_cpu_seq_next, | |
463 | .stop = ct_cpu_seq_stop, | |
464 | .show = ct_cpu_seq_show, | |
465 | }; | |
466 | ||
467 | static int ct_cpu_seq_open(struct inode *inode, struct file *file) | |
468 | { | |
8e9df801 AD |
469 | return seq_open_net(inode, file, &ct_cpu_seq_ops, |
470 | sizeof(struct seq_net_private)); | |
9fb9cbb1 YK |
471 | } |
472 | ||
da7071d7 | 473 | static const struct file_operations ct_cpu_seq_fops = { |
9fb9cbb1 YK |
474 | .owner = THIS_MODULE, |
475 | .open = ct_cpu_seq_open, | |
476 | .read = seq_read, | |
477 | .llseek = seq_lseek, | |
8e9df801 | 478 | .release = seq_release_net, |
9fb9cbb1 | 479 | }; |
b916f7d4 | 480 | |
b2ce2c74 | 481 | static int nf_conntrack_standalone_init_proc(struct net *net) |
b916f7d4 AD |
482 | { |
483 | struct proc_dir_entry *pde; | |
f13f2aee PW |
484 | kuid_t root_uid; |
485 | kgid_t root_gid; | |
b916f7d4 | 486 | |
d4beaa66 | 487 | pde = proc_create("nf_conntrack", 0440, net->proc_net, &ct_file_ops); |
b916f7d4 AD |
488 | if (!pde) |
489 | goto out_nf_conntrack; | |
52c0e111 | 490 | |
f13f2aee PW |
491 | root_uid = make_kuid(net->user_ns, 0); |
492 | root_gid = make_kgid(net->user_ns, 0); | |
493 | if (uid_valid(root_uid) && gid_valid(root_gid)) | |
494 | proc_set_user(pde, root_uid, root_gid); | |
495 | ||
b2ce2c74 | 496 | pde = proc_create("nf_conntrack", S_IRUGO, net->proc_net_stat, |
52c0e111 | 497 | &ct_cpu_seq_fops); |
b916f7d4 AD |
498 | if (!pde) |
499 | goto out_stat_nf_conntrack; | |
b916f7d4 AD |
500 | return 0; |
501 | ||
502 | out_stat_nf_conntrack: | |
ece31ffd | 503 | remove_proc_entry("nf_conntrack", net->proc_net); |
b916f7d4 AD |
504 | out_nf_conntrack: |
505 | return -ENOMEM; | |
506 | } | |
507 | ||
b2ce2c74 | 508 | static void nf_conntrack_standalone_fini_proc(struct net *net) |
b916f7d4 | 509 | { |
b2ce2c74 | 510 | remove_proc_entry("nf_conntrack", net->proc_net_stat); |
ece31ffd | 511 | remove_proc_entry("nf_conntrack", net->proc_net); |
b916f7d4 AD |
512 | } |
513 | #else | |
b2ce2c74 | 514 | static int nf_conntrack_standalone_init_proc(struct net *net) |
b916f7d4 AD |
515 | { |
516 | return 0; | |
517 | } | |
518 | ||
b2ce2c74 | 519 | static void nf_conntrack_standalone_fini_proc(struct net *net) |
b916f7d4 AD |
520 | { |
521 | } | |
54b07dca | 522 | #endif /* CONFIG_NF_CONNTRACK_PROCFS */ |
9fb9cbb1 YK |
523 | |
524 | /* Sysctl support */ | |
525 | ||
526 | #ifdef CONFIG_SYSCTL | |
9fb9cbb1 | 527 | /* Log invalid packets of a given protocol */ |
3183ab89 FW |
528 | static int log_invalid_proto_min __read_mostly; |
529 | static int log_invalid_proto_max __read_mostly = 255; | |
530 | ||
531 | /* size the user *wants to set */ | |
532 | static unsigned int nf_conntrack_htable_size_user __read_mostly; | |
533 | ||
534 | static int | |
535 | nf_conntrack_hash_sysctl(struct ctl_table *table, int write, | |
536 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
537 | { | |
538 | int ret; | |
539 | ||
540 | ret = proc_dointvec(table, write, buffer, lenp, ppos); | |
541 | if (ret < 0 || !write) | |
542 | return ret; | |
543 | ||
544 | /* update ret, we might not be able to satisfy request */ | |
545 | ret = nf_conntrack_hash_resize(nf_conntrack_htable_size_user); | |
546 | ||
547 | /* update it to the actual value used by conntrack */ | |
548 | nf_conntrack_htable_size_user = nf_conntrack_htable_size; | |
549 | return ret; | |
550 | } | |
9fb9cbb1 | 551 | |
9714be7d | 552 | static struct ctl_table_header *nf_ct_netfilter_header; |
9fb9cbb1 | 553 | |
fe2c6338 | 554 | static struct ctl_table nf_ct_sysctl_table[] = { |
9fb9cbb1 | 555 | { |
9fb9cbb1 YK |
556 | .procname = "nf_conntrack_max", |
557 | .data = &nf_conntrack_max, | |
558 | .maxlen = sizeof(int), | |
559 | .mode = 0644, | |
6d9f239a | 560 | .proc_handler = proc_dointvec, |
9fb9cbb1 YK |
561 | }, |
562 | { | |
9fb9cbb1 | 563 | .procname = "nf_conntrack_count", |
49ac8713 | 564 | .data = &init_net.ct.count, |
9fb9cbb1 YK |
565 | .maxlen = sizeof(int), |
566 | .mode = 0444, | |
6d9f239a | 567 | .proc_handler = proc_dointvec, |
9fb9cbb1 YK |
568 | }, |
569 | { | |
9fb9cbb1 | 570 | .procname = "nf_conntrack_buckets", |
3183ab89 | 571 | .data = &nf_conntrack_htable_size_user, |
9fb9cbb1 | 572 | .maxlen = sizeof(unsigned int), |
3183ab89 FW |
573 | .mode = 0644, |
574 | .proc_handler = nf_conntrack_hash_sysctl, | |
9fb9cbb1 | 575 | }, |
39a27a35 | 576 | { |
39a27a35 | 577 | .procname = "nf_conntrack_checksum", |
c04d0552 | 578 | .data = &init_net.ct.sysctl_checksum, |
39a27a35 PM |
579 | .maxlen = sizeof(unsigned int), |
580 | .mode = 0644, | |
6d9f239a | 581 | .proc_handler = proc_dointvec, |
39a27a35 | 582 | }, |
9fb9cbb1 | 583 | { |
9fb9cbb1 | 584 | .procname = "nf_conntrack_log_invalid", |
c2a2c7e0 | 585 | .data = &init_net.ct.sysctl_log_invalid, |
9fb9cbb1 YK |
586 | .maxlen = sizeof(unsigned int), |
587 | .mode = 0644, | |
6d9f239a | 588 | .proc_handler = proc_dointvec_minmax, |
9fb9cbb1 YK |
589 | .extra1 = &log_invalid_proto_min, |
590 | .extra2 = &log_invalid_proto_max, | |
591 | }, | |
f264a7df | 592 | { |
f264a7df PM |
593 | .procname = "nf_conntrack_expect_max", |
594 | .data = &nf_ct_expect_max, | |
595 | .maxlen = sizeof(int), | |
596 | .mode = 0644, | |
6d9f239a | 597 | .proc_handler = proc_dointvec, |
f264a7df | 598 | }, |
f8572d8f | 599 | { } |
9fb9cbb1 YK |
600 | }; |
601 | ||
fe2c6338 | 602 | static struct ctl_table nf_ct_netfilter_table[] = { |
9fb9cbb1 | 603 | { |
9fb9cbb1 YK |
604 | .procname = "nf_conntrack_max", |
605 | .data = &nf_conntrack_max, | |
606 | .maxlen = sizeof(int), | |
607 | .mode = 0644, | |
6d9f239a | 608 | .proc_handler = proc_dointvec, |
9fb9cbb1 | 609 | }, |
f8572d8f | 610 | { } |
9fb9cbb1 YK |
611 | }; |
612 | ||
80250707 | 613 | static int nf_conntrack_standalone_init_sysctl(struct net *net) |
b916f7d4 | 614 | { |
80250707 AD |
615 | struct ctl_table *table; |
616 | ||
80250707 AD |
617 | table = kmemdup(nf_ct_sysctl_table, sizeof(nf_ct_sysctl_table), |
618 | GFP_KERNEL); | |
619 | if (!table) | |
620 | goto out_kmemdup; | |
621 | ||
622 | table[1].data = &net->ct.count; | |
c04d0552 | 623 | table[3].data = &net->ct.sysctl_checksum; |
c2a2c7e0 | 624 | table[4].data = &net->ct.sysctl_log_invalid; |
80250707 | 625 | |
464dc801 EB |
626 | /* Don't export sysctls to unprivileged users */ |
627 | if (net->user_ns != &init_user_ns) | |
628 | table[0].procname = NULL; | |
629 | ||
3183ab89 FW |
630 | if (!net_eq(&init_net, net)) |
631 | table[2].mode = 0444; | |
632 | ||
ec8f23ce | 633 | net->ct.sysctl_header = register_net_sysctl(net, "net/netfilter", table); |
80250707 | 634 | if (!net->ct.sysctl_header) |
9714be7d KPO |
635 | goto out_unregister_netfilter; |
636 | ||
b916f7d4 AD |
637 | return 0; |
638 | ||
9714be7d | 639 | out_unregister_netfilter: |
80250707 AD |
640 | kfree(table); |
641 | out_kmemdup: | |
9714be7d | 642 | return -ENOMEM; |
b916f7d4 AD |
643 | } |
644 | ||
80250707 | 645 | static void nf_conntrack_standalone_fini_sysctl(struct net *net) |
b916f7d4 | 646 | { |
80250707 AD |
647 | struct ctl_table *table; |
648 | ||
80250707 AD |
649 | table = net->ct.sysctl_header->ctl_table_arg; |
650 | unregister_net_sysctl_table(net->ct.sysctl_header); | |
651 | kfree(table); | |
b916f7d4 AD |
652 | } |
653 | #else | |
80250707 | 654 | static int nf_conntrack_standalone_init_sysctl(struct net *net) |
b916f7d4 AD |
655 | { |
656 | return 0; | |
657 | } | |
658 | ||
80250707 | 659 | static void nf_conntrack_standalone_fini_sysctl(struct net *net) |
b916f7d4 AD |
660 | { |
661 | } | |
9fb9cbb1 YK |
662 | #endif /* CONFIG_SYSCTL */ |
663 | ||
f94161c1 | 664 | static int nf_conntrack_pernet_init(struct net *net) |
dfdb8d79 | 665 | { |
b2ce2c74 AD |
666 | int ret; |
667 | ||
f94161c1 | 668 | ret = nf_conntrack_init_net(net); |
b2ce2c74 AD |
669 | if (ret < 0) |
670 | goto out_init; | |
f94161c1 | 671 | |
b2ce2c74 AD |
672 | ret = nf_conntrack_standalone_init_proc(net); |
673 | if (ret < 0) | |
674 | goto out_proc; | |
f94161c1 | 675 | |
c04d0552 | 676 | net->ct.sysctl_checksum = 1; |
c2a2c7e0 | 677 | net->ct.sysctl_log_invalid = 0; |
80250707 AD |
678 | ret = nf_conntrack_standalone_init_sysctl(net); |
679 | if (ret < 0) | |
680 | goto out_sysctl; | |
f94161c1 | 681 | |
b2ce2c74 AD |
682 | return 0; |
683 | ||
80250707 AD |
684 | out_sysctl: |
685 | nf_conntrack_standalone_fini_proc(net); | |
b2ce2c74 | 686 | out_proc: |
f94161c1 | 687 | nf_conntrack_cleanup_net(net); |
b2ce2c74 AD |
688 | out_init: |
689 | return ret; | |
dfdb8d79 AD |
690 | } |
691 | ||
dece40e8 | 692 | static void nf_conntrack_pernet_exit(struct list_head *net_exit_list) |
dfdb8d79 | 693 | { |
dece40e8 VD |
694 | struct net *net; |
695 | ||
696 | list_for_each_entry(net, net_exit_list, exit_list) { | |
697 | nf_conntrack_standalone_fini_sysctl(net); | |
698 | nf_conntrack_standalone_fini_proc(net); | |
699 | } | |
700 | nf_conntrack_cleanup_net_list(net_exit_list); | |
dfdb8d79 AD |
701 | } |
702 | ||
703 | static struct pernet_operations nf_conntrack_net_ops = { | |
dece40e8 VD |
704 | .init = nf_conntrack_pernet_init, |
705 | .exit_batch = nf_conntrack_pernet_exit, | |
dfdb8d79 AD |
706 | }; |
707 | ||
65b4b4e8 | 708 | static int __init nf_conntrack_standalone_init(void) |
9fb9cbb1 | 709 | { |
f94161c1 G |
710 | int ret = nf_conntrack_init_start(); |
711 | if (ret < 0) | |
712 | goto out_start; | |
713 | ||
a9e419dc FW |
714 | BUILD_BUG_ON(SKB_NFCT_PTRMASK != NFCT_PTRMASK); |
715 | BUILD_BUG_ON(NFCT_INFOMASK <= IP_CT_NUMBER); | |
716 | ||
5f9f946b | 717 | #ifdef CONFIG_SYSCTL |
f94161c1 G |
718 | nf_ct_netfilter_header = |
719 | register_net_sysctl(&init_net, "net", nf_ct_netfilter_table); | |
5f9f946b PNA |
720 | if (!nf_ct_netfilter_header) { |
721 | pr_err("nf_conntrack: can't register to sysctl.\n"); | |
5389090b | 722 | ret = -ENOMEM; |
f94161c1 | 723 | goto out_sysctl; |
5f9f946b | 724 | } |
3183ab89 FW |
725 | |
726 | nf_conntrack_htable_size_user = nf_conntrack_htable_size; | |
5f9f946b | 727 | #endif |
f94161c1 G |
728 | |
729 | ret = register_pernet_subsys(&nf_conntrack_net_ops); | |
730 | if (ret < 0) | |
731 | goto out_pernet; | |
732 | ||
733 | nf_conntrack_init_end(); | |
734 | return 0; | |
735 | ||
736 | out_pernet: | |
5f9f946b | 737 | #ifdef CONFIG_SYSCTL |
f94161c1 G |
738 | unregister_net_sysctl_table(nf_ct_netfilter_header); |
739 | out_sysctl: | |
5f9f946b | 740 | #endif |
f94161c1 G |
741 | nf_conntrack_cleanup_end(); |
742 | out_start: | |
743 | return ret; | |
9fb9cbb1 YK |
744 | } |
745 | ||
65b4b4e8 | 746 | static void __exit nf_conntrack_standalone_fini(void) |
9fb9cbb1 | 747 | { |
f94161c1 | 748 | nf_conntrack_cleanup_start(); |
dfdb8d79 | 749 | unregister_pernet_subsys(&nf_conntrack_net_ops); |
5f9f946b | 750 | #ifdef CONFIG_SYSCTL |
f94161c1 | 751 | unregister_net_sysctl_table(nf_ct_netfilter_header); |
5f9f946b | 752 | #endif |
1e47ee83 | 753 | nf_conntrack_cleanup_end(); |
9fb9cbb1 YK |
754 | } |
755 | ||
65b4b4e8 AM |
756 | module_init(nf_conntrack_standalone_init); |
757 | module_exit(nf_conntrack_standalone_fini); | |
9fb9cbb1 YK |
758 | |
759 | /* Some modules need us, but don't depend directly on any symbol. | |
760 | They should call this. */ | |
2e4e6a17 | 761 | void need_conntrack(void) |
9fb9cbb1 YK |
762 | { |
763 | } | |
13b18339 | 764 | EXPORT_SYMBOL_GPL(need_conntrack); |