Commit | Line | Data |
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a0ae2562 | 1 | // SPDX-License-Identifier: GPL-2.0 |
9fb9cbb1 YK |
2 | #include <linux/types.h> |
3 | #include <linux/netfilter.h> | |
5a0e3ad6 | 4 | #include <linux/slab.h> |
9fb9cbb1 YK |
5 | #include <linux/module.h> |
6 | #include <linux/skbuff.h> | |
7 | #include <linux/proc_fs.h> | |
8 | #include <linux/seq_file.h> | |
9 | #include <linux/percpu.h> | |
10 | #include <linux/netdevice.h> | |
1ae4de0c | 11 | #include <linux/security.h> |
457c4cbc | 12 | #include <net/net_namespace.h> |
9fb9cbb1 YK |
13 | #ifdef CONFIG_SYSCTL |
14 | #include <linux/sysctl.h> | |
15 | #endif | |
16 | ||
9fb9cbb1 | 17 | #include <net/netfilter/nf_conntrack.h> |
f6180121 | 18 | #include <net/netfilter/nf_conntrack_core.h> |
605dcad6 | 19 | #include <net/netfilter/nf_conntrack_l4proto.h> |
77ab9cff | 20 | #include <net/netfilter/nf_conntrack_expect.h> |
9fb9cbb1 | 21 | #include <net/netfilter/nf_conntrack_helper.h> |
58401572 | 22 | #include <net/netfilter/nf_conntrack_acct.h> |
5d0aa2cc | 23 | #include <net/netfilter/nf_conntrack_zones.h> |
a992ca2a | 24 | #include <net/netfilter/nf_conntrack_timestamp.h> |
0e60ebe0 | 25 | #include <linux/rculist_nulls.h> |
9fb9cbb1 | 26 | |
a0ae2562 | 27 | unsigned int nf_conntrack_net_id __read_mostly; |
9fb9cbb1 | 28 | |
54b07dca | 29 | #ifdef CONFIG_NF_CONNTRACK_PROCFS |
824f1fbe | 30 | void |
9fb9cbb1 | 31 | print_tuple(struct seq_file *s, const struct nf_conntrack_tuple *tuple, |
32948588 | 32 | const struct nf_conntrack_l4proto *l4proto) |
9fb9cbb1 | 33 | { |
f957be9d | 34 | switch (tuple->src.l3num) { |
91950833 FW |
35 | case NFPROTO_IPV4: |
36 | seq_printf(s, "src=%pI4 dst=%pI4 ", | |
37 | &tuple->src.u3.ip, &tuple->dst.u3.ip); | |
38 | break; | |
39 | case NFPROTO_IPV6: | |
40 | seq_printf(s, "src=%pI6 dst=%pI6 ", | |
41 | tuple->src.u3.ip6, tuple->dst.u3.ip6); | |
42 | break; | |
43 | default: | |
44 | break; | |
45 | } | |
46 | ||
47 | switch (l4proto->l4proto) { | |
48 | case IPPROTO_ICMP: | |
49 | seq_printf(s, "type=%u code=%u id=%u ", | |
50 | tuple->dst.u.icmp.type, | |
51 | tuple->dst.u.icmp.code, | |
52 | ntohs(tuple->src.u.icmp.id)); | |
53 | break; | |
54 | case IPPROTO_TCP: | |
55 | seq_printf(s, "sport=%hu dport=%hu ", | |
56 | ntohs(tuple->src.u.tcp.port), | |
57 | ntohs(tuple->dst.u.tcp.port)); | |
58 | break; | |
59 | case IPPROTO_UDPLITE: /* fallthrough */ | |
60 | case IPPROTO_UDP: | |
61 | seq_printf(s, "sport=%hu dport=%hu ", | |
62 | ntohs(tuple->src.u.udp.port), | |
63 | ntohs(tuple->dst.u.udp.port)); | |
64 | ||
65 | break; | |
66 | case IPPROTO_DCCP: | |
67 | seq_printf(s, "sport=%hu dport=%hu ", | |
68 | ntohs(tuple->src.u.dccp.port), | |
69 | ntohs(tuple->dst.u.dccp.port)); | |
70 | break; | |
71 | case IPPROTO_SCTP: | |
72 | seq_printf(s, "sport=%hu dport=%hu ", | |
73 | ntohs(tuple->src.u.sctp.port), | |
74 | ntohs(tuple->dst.u.sctp.port)); | |
75 | break; | |
76 | case IPPROTO_ICMPV6: | |
77 | seq_printf(s, "type=%u code=%u id=%u ", | |
78 | tuple->dst.u.icmp.type, | |
79 | tuple->dst.u.icmp.code, | |
80 | ntohs(tuple->src.u.icmp.id)); | |
81 | break; | |
82 | case IPPROTO_GRE: | |
83 | seq_printf(s, "srckey=0x%x dstkey=0x%x ", | |
84 | ntohs(tuple->src.u.gre.key), | |
85 | ntohs(tuple->dst.u.gre.key)); | |
86 | break; | |
87 | default: | |
88 | break; | |
89 | } | |
9fb9cbb1 | 90 | } |
e4bd8bce | 91 | EXPORT_SYMBOL_GPL(print_tuple); |
9fb9cbb1 | 92 | |
9fb9cbb1 | 93 | struct ct_iter_state { |
b2ce2c74 | 94 | struct seq_net_private p; |
64b87639 LZ |
95 | struct hlist_nulls_head *hash; |
96 | unsigned int htable_size; | |
9fb9cbb1 | 97 | unsigned int bucket; |
a992ca2a | 98 | u_int64_t time_now; |
9fb9cbb1 YK |
99 | }; |
100 | ||
ea781f19 | 101 | static struct hlist_nulls_node *ct_get_first(struct seq_file *seq) |
9fb9cbb1 YK |
102 | { |
103 | struct ct_iter_state *st = seq->private; | |
ea781f19 | 104 | struct hlist_nulls_node *n; |
9fb9cbb1 YK |
105 | |
106 | for (st->bucket = 0; | |
64b87639 | 107 | st->bucket < st->htable_size; |
9fb9cbb1 | 108 | st->bucket++) { |
64b87639 LZ |
109 | n = rcu_dereference( |
110 | hlist_nulls_first_rcu(&st->hash[st->bucket])); | |
ea781f19 | 111 | if (!is_a_nulls(n)) |
76507f69 | 112 | return n; |
9fb9cbb1 YK |
113 | } |
114 | return NULL; | |
115 | } | |
116 | ||
ea781f19 ED |
117 | static struct hlist_nulls_node *ct_get_next(struct seq_file *seq, |
118 | struct hlist_nulls_node *head) | |
9fb9cbb1 YK |
119 | { |
120 | struct ct_iter_state *st = seq->private; | |
121 | ||
0e60ebe0 | 122 | head = rcu_dereference(hlist_nulls_next_rcu(head)); |
ea781f19 ED |
123 | while (is_a_nulls(head)) { |
124 | if (likely(get_nulls_value(head) == st->bucket)) { | |
64b87639 | 125 | if (++st->bucket >= st->htable_size) |
ea781f19 ED |
126 | return NULL; |
127 | } | |
0e60ebe0 | 128 | head = rcu_dereference( |
64b87639 | 129 | hlist_nulls_first_rcu(&st->hash[st->bucket])); |
9fb9cbb1 YK |
130 | } |
131 | return head; | |
132 | } | |
133 | ||
ea781f19 | 134 | static struct hlist_nulls_node *ct_get_idx(struct seq_file *seq, loff_t pos) |
9fb9cbb1 | 135 | { |
ea781f19 | 136 | struct hlist_nulls_node *head = ct_get_first(seq); |
9fb9cbb1 YK |
137 | |
138 | if (head) | |
139 | while (pos && (head = ct_get_next(seq, head))) | |
140 | pos--; | |
141 | return pos ? NULL : head; | |
142 | } | |
143 | ||
144 | static void *ct_seq_start(struct seq_file *seq, loff_t *pos) | |
76507f69 | 145 | __acquires(RCU) |
9fb9cbb1 | 146 | { |
a992ca2a PNA |
147 | struct ct_iter_state *st = seq->private; |
148 | ||
d2de875c | 149 | st->time_now = ktime_get_real_ns(); |
76507f69 | 150 | rcu_read_lock(); |
64b87639 LZ |
151 | |
152 | nf_conntrack_get_ht(&st->hash, &st->htable_size); | |
9fb9cbb1 YK |
153 | return ct_get_idx(seq, *pos); |
154 | } | |
155 | ||
156 | static void *ct_seq_next(struct seq_file *s, void *v, loff_t *pos) | |
157 | { | |
158 | (*pos)++; | |
159 | return ct_get_next(s, v); | |
160 | } | |
161 | ||
162 | static void ct_seq_stop(struct seq_file *s, void *v) | |
76507f69 | 163 | __releases(RCU) |
9fb9cbb1 | 164 | { |
76507f69 | 165 | rcu_read_unlock(); |
9fb9cbb1 YK |
166 | } |
167 | ||
1ae4de0c | 168 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
e71456ae | 169 | static void ct_show_secctx(struct seq_file *s, const struct nf_conn *ct) |
1ae4de0c EP |
170 | { |
171 | int ret; | |
172 | u32 len; | |
173 | char *secctx; | |
174 | ||
175 | ret = security_secid_to_secctx(ct->secmark, &secctx, &len); | |
176 | if (ret) | |
e71456ae | 177 | return; |
1ae4de0c | 178 | |
e71456ae | 179 | seq_printf(s, "secctx=%s ", secctx); |
1ae4de0c EP |
180 | |
181 | security_release_secctx(secctx, len); | |
1ae4de0c EP |
182 | } |
183 | #else | |
e71456ae | 184 | static inline void ct_show_secctx(struct seq_file *s, const struct nf_conn *ct) |
1ae4de0c | 185 | { |
1ae4de0c EP |
186 | } |
187 | #endif | |
188 | ||
308ac914 | 189 | #ifdef CONFIG_NF_CONNTRACK_ZONES |
deedb590 DB |
190 | static void ct_show_zone(struct seq_file *s, const struct nf_conn *ct, |
191 | int dir) | |
308ac914 | 192 | { |
deedb590 DB |
193 | const struct nf_conntrack_zone *zone = nf_ct_zone(ct); |
194 | ||
195 | if (zone->dir != dir) | |
196 | return; | |
197 | switch (zone->dir) { | |
198 | case NF_CT_DEFAULT_ZONE_DIR: | |
199 | seq_printf(s, "zone=%u ", zone->id); | |
200 | break; | |
201 | case NF_CT_ZONE_DIR_ORIG: | |
202 | seq_printf(s, "zone-orig=%u ", zone->id); | |
203 | break; | |
204 | case NF_CT_ZONE_DIR_REPL: | |
205 | seq_printf(s, "zone-reply=%u ", zone->id); | |
206 | break; | |
207 | default: | |
208 | break; | |
209 | } | |
308ac914 DB |
210 | } |
211 | #else | |
deedb590 DB |
212 | static inline void ct_show_zone(struct seq_file *s, const struct nf_conn *ct, |
213 | int dir) | |
308ac914 DB |
214 | { |
215 | } | |
216 | #endif | |
217 | ||
a992ca2a | 218 | #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP |
e71456ae | 219 | static void ct_show_delta_time(struct seq_file *s, const struct nf_conn *ct) |
a992ca2a | 220 | { |
f5c88f56 | 221 | struct ct_iter_state *st = s->private; |
a992ca2a | 222 | struct nf_conn_tstamp *tstamp; |
f5c88f56 | 223 | s64 delta_time; |
a992ca2a PNA |
224 | |
225 | tstamp = nf_conn_tstamp_find(ct); | |
226 | if (tstamp) { | |
f5c88f56 PM |
227 | delta_time = st->time_now - tstamp->start; |
228 | if (delta_time > 0) | |
229 | delta_time = div_s64(delta_time, NSEC_PER_SEC); | |
230 | else | |
231 | delta_time = 0; | |
232 | ||
e71456ae SRRH |
233 | seq_printf(s, "delta-time=%llu ", |
234 | (unsigned long long)delta_time); | |
a992ca2a | 235 | } |
e71456ae | 236 | return; |
a992ca2a PNA |
237 | } |
238 | #else | |
e71456ae | 239 | static inline void |
a992ca2a PNA |
240 | ct_show_delta_time(struct seq_file *s, const struct nf_conn *ct) |
241 | { | |
a992ca2a PNA |
242 | } |
243 | #endif | |
244 | ||
a3134d53 FW |
245 | static const char* l3proto_name(u16 proto) |
246 | { | |
247 | switch (proto) { | |
248 | case AF_INET: return "ipv4"; | |
249 | case AF_INET6: return "ipv6"; | |
250 | } | |
251 | ||
252 | return "unknown"; | |
253 | } | |
254 | ||
09ec82f5 FW |
255 | static const char* l4proto_name(u16 proto) |
256 | { | |
257 | switch (proto) { | |
258 | case IPPROTO_ICMP: return "icmp"; | |
259 | case IPPROTO_TCP: return "tcp"; | |
260 | case IPPROTO_UDP: return "udp"; | |
261 | case IPPROTO_DCCP: return "dccp"; | |
262 | case IPPROTO_GRE: return "gre"; | |
263 | case IPPROTO_SCTP: return "sctp"; | |
264 | case IPPROTO_UDPLITE: return "udplite"; | |
265 | } | |
266 | ||
267 | return "unknown"; | |
268 | } | |
269 | ||
4b216e21 FW |
270 | static unsigned int |
271 | seq_print_acct(struct seq_file *s, const struct nf_conn *ct, int dir) | |
272 | { | |
273 | struct nf_conn_acct *acct; | |
274 | struct nf_conn_counter *counter; | |
275 | ||
276 | acct = nf_conn_acct_find(ct); | |
277 | if (!acct) | |
278 | return 0; | |
279 | ||
280 | counter = acct->counter; | |
281 | seq_printf(s, "packets=%llu bytes=%llu ", | |
282 | (unsigned long long)atomic64_read(&counter[dir].packets), | |
283 | (unsigned long long)atomic64_read(&counter[dir].bytes)); | |
284 | ||
285 | return 0; | |
286 | } | |
287 | ||
9fb9cbb1 YK |
288 | /* return 0 on success, 1 in case of error */ |
289 | static int ct_seq_show(struct seq_file *s, void *v) | |
290 | { | |
ea781f19 ED |
291 | struct nf_conntrack_tuple_hash *hash = v; |
292 | struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(hash); | |
32948588 | 293 | const struct nf_conntrack_l4proto *l4proto; |
e77e6ff5 | 294 | struct net *net = seq_file_net(s); |
ea781f19 | 295 | int ret = 0; |
9fb9cbb1 | 296 | |
44d6e2f2 | 297 | WARN_ON(!ct); |
ea781f19 ED |
298 | if (unlikely(!atomic_inc_not_zero(&ct->ct_general.use))) |
299 | return 0; | |
9fb9cbb1 | 300 | |
58e207e4 FW |
301 | if (nf_ct_should_gc(ct)) { |
302 | nf_ct_kill(ct); | |
303 | goto release; | |
304 | } | |
305 | ||
9fb9cbb1 YK |
306 | /* we only want to print DIR_ORIGINAL */ |
307 | if (NF_CT_DIRECTION(hash)) | |
ea781f19 | 308 | goto release; |
9fb9cbb1 | 309 | |
e77e6ff5 LZ |
310 | if (!net_eq(nf_ct_net(ct), net)) |
311 | goto release; | |
312 | ||
dd2934a9 | 313 | l4proto = __nf_ct_l4proto_find(nf_ct_protonum(ct)); |
44d6e2f2 | 314 | WARN_ON(!l4proto); |
9fb9cbb1 | 315 | |
ea781f19 | 316 | ret = -ENOSPC; |
90964016 | 317 | seq_printf(s, "%-8s %u %-8s %u ", |
f957be9d | 318 | l3proto_name(nf_ct_l3num(ct)), nf_ct_l3num(ct), |
90964016 PNA |
319 | l4proto_name(l4proto->l4proto), nf_ct_protonum(ct)); |
320 | ||
321 | if (!test_bit(IPS_OFFLOAD_BIT, &ct->status)) | |
322 | seq_printf(s, "%ld ", nf_ct_expires(ct) / HZ); | |
9fb9cbb1 | 323 | |
37246a58 SRRH |
324 | if (l4proto->print_conntrack) |
325 | l4proto->print_conntrack(s, ct); | |
9fb9cbb1 | 326 | |
824f1fbe | 327 | print_tuple(s, &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple, |
f957be9d | 328 | l4proto); |
9fb9cbb1 | 329 | |
deedb590 DB |
330 | ct_show_zone(s, ct, NF_CT_ZONE_DIR_ORIG); |
331 | ||
e71456ae SRRH |
332 | if (seq_has_overflowed(s)) |
333 | goto release; | |
334 | ||
58401572 | 335 | if (seq_print_acct(s, ct, IP_CT_DIR_ORIGINAL)) |
ea781f19 | 336 | goto release; |
9fb9cbb1 | 337 | |
c88130bc | 338 | if (!(test_bit(IPS_SEEN_REPLY_BIT, &ct->status))) |
cdec2685 | 339 | seq_puts(s, "[UNREPLIED] "); |
9fb9cbb1 | 340 | |
f957be9d | 341 | print_tuple(s, &ct->tuplehash[IP_CT_DIR_REPLY].tuple, l4proto); |
9fb9cbb1 | 342 | |
deedb590 DB |
343 | ct_show_zone(s, ct, NF_CT_ZONE_DIR_REPL); |
344 | ||
58401572 | 345 | if (seq_print_acct(s, ct, IP_CT_DIR_REPLY)) |
ea781f19 | 346 | goto release; |
9fb9cbb1 | 347 | |
90964016 PNA |
348 | if (test_bit(IPS_OFFLOAD_BIT, &ct->status)) |
349 | seq_puts(s, "[OFFLOAD] "); | |
350 | else if (test_bit(IPS_ASSURED_BIT, &ct->status)) | |
cdec2685 | 351 | seq_puts(s, "[ASSURED] "); |
9fb9cbb1 | 352 | |
e71456ae | 353 | if (seq_has_overflowed(s)) |
ea781f19 | 354 | goto release; |
e71456ae SRRH |
355 | |
356 | #if defined(CONFIG_NF_CONNTRACK_MARK) | |
357 | seq_printf(s, "mark=%u ", ct->mark); | |
9fb9cbb1 YK |
358 | #endif |
359 | ||
e71456ae | 360 | ct_show_secctx(s, ct); |
deedb590 | 361 | ct_show_zone(s, ct, NF_CT_DEFAULT_ZONE_DIR); |
e71456ae SRRH |
362 | ct_show_delta_time(s, ct); |
363 | ||
364 | seq_printf(s, "use=%u\n", atomic_read(&ct->ct_general.use)); | |
a992ca2a | 365 | |
e71456ae | 366 | if (seq_has_overflowed(s)) |
ea781f19 | 367 | goto release; |
a5d29264 | 368 | |
ea781f19 ED |
369 | ret = 0; |
370 | release: | |
371 | nf_ct_put(ct); | |
d88d7de0 | 372 | return ret; |
9fb9cbb1 YK |
373 | } |
374 | ||
56b3d975 | 375 | static const struct seq_operations ct_seq_ops = { |
9fb9cbb1 YK |
376 | .start = ct_seq_start, |
377 | .next = ct_seq_next, | |
378 | .stop = ct_seq_stop, | |
379 | .show = ct_seq_show | |
380 | }; | |
381 | ||
9fb9cbb1 YK |
382 | static void *ct_cpu_seq_start(struct seq_file *seq, loff_t *pos) |
383 | { | |
8e9df801 | 384 | struct net *net = seq_file_net(seq); |
9fb9cbb1 YK |
385 | int cpu; |
386 | ||
387 | if (*pos == 0) | |
388 | return SEQ_START_TOKEN; | |
389 | ||
0f23174a | 390 | for (cpu = *pos-1; cpu < nr_cpu_ids; ++cpu) { |
9fb9cbb1 YK |
391 | if (!cpu_possible(cpu)) |
392 | continue; | |
393 | *pos = cpu + 1; | |
8e9df801 | 394 | return per_cpu_ptr(net->ct.stat, cpu); |
9fb9cbb1 YK |
395 | } |
396 | ||
397 | return NULL; | |
398 | } | |
399 | ||
400 | static void *ct_cpu_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
401 | { | |
8e9df801 | 402 | struct net *net = seq_file_net(seq); |
9fb9cbb1 YK |
403 | int cpu; |
404 | ||
0f23174a | 405 | for (cpu = *pos; cpu < nr_cpu_ids; ++cpu) { |
9fb9cbb1 YK |
406 | if (!cpu_possible(cpu)) |
407 | continue; | |
408 | *pos = cpu + 1; | |
8e9df801 | 409 | return per_cpu_ptr(net->ct.stat, cpu); |
9fb9cbb1 YK |
410 | } |
411 | ||
412 | return NULL; | |
413 | } | |
414 | ||
415 | static void ct_cpu_seq_stop(struct seq_file *seq, void *v) | |
416 | { | |
417 | } | |
418 | ||
419 | static int ct_cpu_seq_show(struct seq_file *seq, void *v) | |
420 | { | |
8e9df801 AD |
421 | struct net *net = seq_file_net(seq); |
422 | unsigned int nr_conntracks = atomic_read(&net->ct.count); | |
32948588 | 423 | const struct ip_conntrack_stat *st = v; |
9fb9cbb1 YK |
424 | |
425 | if (v == SEQ_START_TOKEN) { | |
cdec2685 | 426 | 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 |
427 | return 0; |
428 | } | |
429 | ||
430 | seq_printf(seq, "%08x %08x %08x %08x %08x %08x %08x %08x " | |
af740b2c | 431 | "%08x %08x %08x %08x %08x %08x %08x %08x %08x\n", |
9fb9cbb1 | 432 | nr_conntracks, |
8e8118f8 | 433 | 0, |
9fb9cbb1 | 434 | st->found, |
8e8118f8 | 435 | 0, |
9fb9cbb1 YK |
436 | st->invalid, |
437 | st->ignore, | |
8e8118f8 FW |
438 | 0, |
439 | 0, | |
9fb9cbb1 YK |
440 | st->insert, |
441 | st->insert_failed, | |
442 | st->drop, | |
443 | st->early_drop, | |
444 | st->error, | |
445 | ||
446 | st->expect_new, | |
447 | st->expect_create, | |
af740b2c JDB |
448 | st->expect_delete, |
449 | st->search_restart | |
9fb9cbb1 YK |
450 | ); |
451 | return 0; | |
452 | } | |
453 | ||
56b3d975 | 454 | static const struct seq_operations ct_cpu_seq_ops = { |
9fb9cbb1 YK |
455 | .start = ct_cpu_seq_start, |
456 | .next = ct_cpu_seq_next, | |
457 | .stop = ct_cpu_seq_stop, | |
458 | .show = ct_cpu_seq_show, | |
459 | }; | |
460 | ||
b2ce2c74 | 461 | static int nf_conntrack_standalone_init_proc(struct net *net) |
b916f7d4 AD |
462 | { |
463 | struct proc_dir_entry *pde; | |
f13f2aee PW |
464 | kuid_t root_uid; |
465 | kgid_t root_gid; | |
b916f7d4 | 466 | |
c3506372 CH |
467 | pde = proc_create_net("nf_conntrack", 0440, net->proc_net, &ct_seq_ops, |
468 | sizeof(struct ct_iter_state)); | |
b916f7d4 AD |
469 | if (!pde) |
470 | goto out_nf_conntrack; | |
52c0e111 | 471 | |
f13f2aee PW |
472 | root_uid = make_kuid(net->user_ns, 0); |
473 | root_gid = make_kgid(net->user_ns, 0); | |
474 | if (uid_valid(root_uid) && gid_valid(root_gid)) | |
475 | proc_set_user(pde, root_uid, root_gid); | |
476 | ||
c3506372 CH |
477 | pde = proc_create_net("nf_conntrack", 0444, net->proc_net_stat, |
478 | &ct_cpu_seq_ops, sizeof(struct seq_net_private)); | |
b916f7d4 AD |
479 | if (!pde) |
480 | goto out_stat_nf_conntrack; | |
b916f7d4 AD |
481 | return 0; |
482 | ||
483 | out_stat_nf_conntrack: | |
ece31ffd | 484 | remove_proc_entry("nf_conntrack", net->proc_net); |
b916f7d4 AD |
485 | out_nf_conntrack: |
486 | return -ENOMEM; | |
487 | } | |
488 | ||
b2ce2c74 | 489 | static void nf_conntrack_standalone_fini_proc(struct net *net) |
b916f7d4 | 490 | { |
b2ce2c74 | 491 | remove_proc_entry("nf_conntrack", net->proc_net_stat); |
ece31ffd | 492 | remove_proc_entry("nf_conntrack", net->proc_net); |
b916f7d4 AD |
493 | } |
494 | #else | |
b2ce2c74 | 495 | static int nf_conntrack_standalone_init_proc(struct net *net) |
b916f7d4 AD |
496 | { |
497 | return 0; | |
498 | } | |
499 | ||
b2ce2c74 | 500 | static void nf_conntrack_standalone_fini_proc(struct net *net) |
b916f7d4 AD |
501 | { |
502 | } | |
54b07dca | 503 | #endif /* CONFIG_NF_CONNTRACK_PROCFS */ |
9fb9cbb1 YK |
504 | |
505 | /* Sysctl support */ | |
506 | ||
507 | #ifdef CONFIG_SYSCTL | |
9fb9cbb1 | 508 | /* Log invalid packets of a given protocol */ |
3183ab89 FW |
509 | static int log_invalid_proto_min __read_mostly; |
510 | static int log_invalid_proto_max __read_mostly = 255; | |
511 | ||
512 | /* size the user *wants to set */ | |
513 | static unsigned int nf_conntrack_htable_size_user __read_mostly; | |
514 | ||
515 | static int | |
516 | nf_conntrack_hash_sysctl(struct ctl_table *table, int write, | |
517 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
518 | { | |
519 | int ret; | |
520 | ||
521 | ret = proc_dointvec(table, write, buffer, lenp, ppos); | |
522 | if (ret < 0 || !write) | |
523 | return ret; | |
524 | ||
525 | /* update ret, we might not be able to satisfy request */ | |
526 | ret = nf_conntrack_hash_resize(nf_conntrack_htable_size_user); | |
527 | ||
528 | /* update it to the actual value used by conntrack */ | |
529 | nf_conntrack_htable_size_user = nf_conntrack_htable_size; | |
530 | return ret; | |
531 | } | |
9fb9cbb1 | 532 | |
9714be7d | 533 | static struct ctl_table_header *nf_ct_netfilter_header; |
9fb9cbb1 | 534 | |
4a65798a FW |
535 | enum nf_ct_sysctl_index { |
536 | NF_SYSCTL_CT_MAX, | |
537 | NF_SYSCTL_CT_COUNT, | |
538 | NF_SYSCTL_CT_BUCKETS, | |
539 | NF_SYSCTL_CT_CHECKSUM, | |
540 | NF_SYSCTL_CT_LOG_INVALID, | |
541 | NF_SYSCTL_CT_EXPECT_MAX, | |
542 | }; | |
543 | ||
fe2c6338 | 544 | static struct ctl_table nf_ct_sysctl_table[] = { |
4a65798a | 545 | [NF_SYSCTL_CT_MAX] = { |
9fb9cbb1 YK |
546 | .procname = "nf_conntrack_max", |
547 | .data = &nf_conntrack_max, | |
548 | .maxlen = sizeof(int), | |
549 | .mode = 0644, | |
6d9f239a | 550 | .proc_handler = proc_dointvec, |
9fb9cbb1 | 551 | }, |
4a65798a | 552 | [NF_SYSCTL_CT_COUNT] = { |
9fb9cbb1 | 553 | .procname = "nf_conntrack_count", |
49ac8713 | 554 | .data = &init_net.ct.count, |
9fb9cbb1 YK |
555 | .maxlen = sizeof(int), |
556 | .mode = 0444, | |
6d9f239a | 557 | .proc_handler = proc_dointvec, |
9fb9cbb1 | 558 | }, |
4a65798a | 559 | [NF_SYSCTL_CT_BUCKETS] = { |
9fb9cbb1 | 560 | .procname = "nf_conntrack_buckets", |
3183ab89 | 561 | .data = &nf_conntrack_htable_size_user, |
9fb9cbb1 | 562 | .maxlen = sizeof(unsigned int), |
3183ab89 FW |
563 | .mode = 0644, |
564 | .proc_handler = nf_conntrack_hash_sysctl, | |
9fb9cbb1 | 565 | }, |
4a65798a | 566 | [NF_SYSCTL_CT_CHECKSUM] = { |
39a27a35 | 567 | .procname = "nf_conntrack_checksum", |
c04d0552 | 568 | .data = &init_net.ct.sysctl_checksum, |
39a27a35 PM |
569 | .maxlen = sizeof(unsigned int), |
570 | .mode = 0644, | |
6d9f239a | 571 | .proc_handler = proc_dointvec, |
39a27a35 | 572 | }, |
4a65798a | 573 | [NF_SYSCTL_CT_LOG_INVALID] = { |
9fb9cbb1 | 574 | .procname = "nf_conntrack_log_invalid", |
c2a2c7e0 | 575 | .data = &init_net.ct.sysctl_log_invalid, |
9fb9cbb1 YK |
576 | .maxlen = sizeof(unsigned int), |
577 | .mode = 0644, | |
6d9f239a | 578 | .proc_handler = proc_dointvec_minmax, |
9fb9cbb1 YK |
579 | .extra1 = &log_invalid_proto_min, |
580 | .extra2 = &log_invalid_proto_max, | |
581 | }, | |
4a65798a | 582 | [NF_SYSCTL_CT_EXPECT_MAX] = { |
f264a7df PM |
583 | .procname = "nf_conntrack_expect_max", |
584 | .data = &nf_ct_expect_max, | |
585 | .maxlen = sizeof(int), | |
586 | .mode = 0644, | |
6d9f239a | 587 | .proc_handler = proc_dointvec, |
f264a7df | 588 | }, |
f8572d8f | 589 | { } |
9fb9cbb1 YK |
590 | }; |
591 | ||
fe2c6338 | 592 | static struct ctl_table nf_ct_netfilter_table[] = { |
9fb9cbb1 | 593 | { |
9fb9cbb1 YK |
594 | .procname = "nf_conntrack_max", |
595 | .data = &nf_conntrack_max, | |
596 | .maxlen = sizeof(int), | |
597 | .mode = 0644, | |
6d9f239a | 598 | .proc_handler = proc_dointvec, |
9fb9cbb1 | 599 | }, |
f8572d8f | 600 | { } |
9fb9cbb1 YK |
601 | }; |
602 | ||
80250707 | 603 | static int nf_conntrack_standalone_init_sysctl(struct net *net) |
b916f7d4 | 604 | { |
80250707 AD |
605 | struct ctl_table *table; |
606 | ||
80250707 AD |
607 | table = kmemdup(nf_ct_sysctl_table, sizeof(nf_ct_sysctl_table), |
608 | GFP_KERNEL); | |
609 | if (!table) | |
610 | goto out_kmemdup; | |
611 | ||
4a65798a FW |
612 | table[NF_SYSCTL_CT_COUNT].data = &net->ct.count; |
613 | table[NF_SYSCTL_CT_CHECKSUM].data = &net->ct.sysctl_checksum; | |
614 | table[NF_SYSCTL_CT_LOG_INVALID].data = &net->ct.sysctl_log_invalid; | |
80250707 | 615 | |
464dc801 EB |
616 | /* Don't export sysctls to unprivileged users */ |
617 | if (net->user_ns != &init_user_ns) | |
4a65798a | 618 | table[NF_SYSCTL_CT_MAX].procname = NULL; |
464dc801 | 619 | |
3183ab89 | 620 | if (!net_eq(&init_net, net)) |
4a65798a | 621 | table[NF_SYSCTL_CT_BUCKETS].mode = 0444; |
3183ab89 | 622 | |
ec8f23ce | 623 | net->ct.sysctl_header = register_net_sysctl(net, "net/netfilter", table); |
80250707 | 624 | if (!net->ct.sysctl_header) |
9714be7d KPO |
625 | goto out_unregister_netfilter; |
626 | ||
b916f7d4 AD |
627 | return 0; |
628 | ||
9714be7d | 629 | out_unregister_netfilter: |
80250707 AD |
630 | kfree(table); |
631 | out_kmemdup: | |
9714be7d | 632 | return -ENOMEM; |
b916f7d4 AD |
633 | } |
634 | ||
80250707 | 635 | static void nf_conntrack_standalone_fini_sysctl(struct net *net) |
b916f7d4 | 636 | { |
80250707 AD |
637 | struct ctl_table *table; |
638 | ||
80250707 AD |
639 | table = net->ct.sysctl_header->ctl_table_arg; |
640 | unregister_net_sysctl_table(net->ct.sysctl_header); | |
641 | kfree(table); | |
b916f7d4 AD |
642 | } |
643 | #else | |
80250707 | 644 | static int nf_conntrack_standalone_init_sysctl(struct net *net) |
b916f7d4 AD |
645 | { |
646 | return 0; | |
647 | } | |
648 | ||
80250707 | 649 | static void nf_conntrack_standalone_fini_sysctl(struct net *net) |
b916f7d4 AD |
650 | { |
651 | } | |
9fb9cbb1 YK |
652 | #endif /* CONFIG_SYSCTL */ |
653 | ||
f94161c1 | 654 | static int nf_conntrack_pernet_init(struct net *net) |
dfdb8d79 | 655 | { |
b2ce2c74 AD |
656 | int ret; |
657 | ||
f94161c1 | 658 | ret = nf_conntrack_init_net(net); |
b2ce2c74 AD |
659 | if (ret < 0) |
660 | goto out_init; | |
f94161c1 | 661 | |
b2ce2c74 AD |
662 | ret = nf_conntrack_standalone_init_proc(net); |
663 | if (ret < 0) | |
664 | goto out_proc; | |
f94161c1 | 665 | |
c04d0552 | 666 | net->ct.sysctl_checksum = 1; |
c2a2c7e0 | 667 | net->ct.sysctl_log_invalid = 0; |
80250707 AD |
668 | ret = nf_conntrack_standalone_init_sysctl(net); |
669 | if (ret < 0) | |
670 | goto out_sysctl; | |
f94161c1 | 671 | |
b2ce2c74 AD |
672 | return 0; |
673 | ||
80250707 AD |
674 | out_sysctl: |
675 | nf_conntrack_standalone_fini_proc(net); | |
b2ce2c74 | 676 | out_proc: |
f94161c1 | 677 | nf_conntrack_cleanup_net(net); |
b2ce2c74 AD |
678 | out_init: |
679 | return ret; | |
dfdb8d79 AD |
680 | } |
681 | ||
dece40e8 | 682 | static void nf_conntrack_pernet_exit(struct list_head *net_exit_list) |
dfdb8d79 | 683 | { |
dece40e8 VD |
684 | struct net *net; |
685 | ||
686 | list_for_each_entry(net, net_exit_list, exit_list) { | |
687 | nf_conntrack_standalone_fini_sysctl(net); | |
688 | nf_conntrack_standalone_fini_proc(net); | |
689 | } | |
690 | nf_conntrack_cleanup_net_list(net_exit_list); | |
dfdb8d79 AD |
691 | } |
692 | ||
693 | static struct pernet_operations nf_conntrack_net_ops = { | |
dece40e8 VD |
694 | .init = nf_conntrack_pernet_init, |
695 | .exit_batch = nf_conntrack_pernet_exit, | |
a0ae2562 FW |
696 | .id = &nf_conntrack_net_id, |
697 | .size = sizeof(struct nf_conntrack_net), | |
dfdb8d79 AD |
698 | }; |
699 | ||
65b4b4e8 | 700 | static int __init nf_conntrack_standalone_init(void) |
9fb9cbb1 | 701 | { |
f94161c1 G |
702 | int ret = nf_conntrack_init_start(); |
703 | if (ret < 0) | |
704 | goto out_start; | |
705 | ||
a9e419dc FW |
706 | BUILD_BUG_ON(SKB_NFCT_PTRMASK != NFCT_PTRMASK); |
707 | BUILD_BUG_ON(NFCT_INFOMASK <= IP_CT_NUMBER); | |
708 | ||
5f9f946b | 709 | #ifdef CONFIG_SYSCTL |
f94161c1 G |
710 | nf_ct_netfilter_header = |
711 | register_net_sysctl(&init_net, "net", nf_ct_netfilter_table); | |
5f9f946b PNA |
712 | if (!nf_ct_netfilter_header) { |
713 | pr_err("nf_conntrack: can't register to sysctl.\n"); | |
5389090b | 714 | ret = -ENOMEM; |
f94161c1 | 715 | goto out_sysctl; |
5f9f946b | 716 | } |
3183ab89 FW |
717 | |
718 | nf_conntrack_htable_size_user = nf_conntrack_htable_size; | |
5f9f946b | 719 | #endif |
f94161c1 G |
720 | |
721 | ret = register_pernet_subsys(&nf_conntrack_net_ops); | |
722 | if (ret < 0) | |
723 | goto out_pernet; | |
724 | ||
725 | nf_conntrack_init_end(); | |
726 | return 0; | |
727 | ||
728 | out_pernet: | |
5f9f946b | 729 | #ifdef CONFIG_SYSCTL |
f94161c1 G |
730 | unregister_net_sysctl_table(nf_ct_netfilter_header); |
731 | out_sysctl: | |
5f9f946b | 732 | #endif |
f94161c1 G |
733 | nf_conntrack_cleanup_end(); |
734 | out_start: | |
735 | return ret; | |
9fb9cbb1 YK |
736 | } |
737 | ||
65b4b4e8 | 738 | static void __exit nf_conntrack_standalone_fini(void) |
9fb9cbb1 | 739 | { |
f94161c1 | 740 | nf_conntrack_cleanup_start(); |
dfdb8d79 | 741 | unregister_pernet_subsys(&nf_conntrack_net_ops); |
5f9f946b | 742 | #ifdef CONFIG_SYSCTL |
f94161c1 | 743 | unregister_net_sysctl_table(nf_ct_netfilter_header); |
5f9f946b | 744 | #endif |
1e47ee83 | 745 | nf_conntrack_cleanup_end(); |
9fb9cbb1 YK |
746 | } |
747 | ||
65b4b4e8 AM |
748 | module_init(nf_conntrack_standalone_init); |
749 | module_exit(nf_conntrack_standalone_fini); |