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e4bd8bce PM |
1 | /* ip_conntrack proc compat - based on ip_conntrack_standalone.c |
2 | * | |
3 | * (C) 1999-2001 Paul `Rusty' Russell | |
4 | * (C) 2002-2006 Netfilter Core Team <coreteam@netfilter.org> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | */ | |
10 | #include <linux/types.h> | |
11 | #include <linux/proc_fs.h> | |
12 | #include <linux/seq_file.h> | |
13 | #include <linux/percpu.h> | |
457c4cbc | 14 | #include <net/net_namespace.h> |
e4bd8bce PM |
15 | |
16 | #include <linux/netfilter.h> | |
17 | #include <net/netfilter/nf_conntrack_core.h> | |
18 | #include <net/netfilter/nf_conntrack_l3proto.h> | |
19 | #include <net/netfilter/nf_conntrack_l4proto.h> | |
20 | #include <net/netfilter/nf_conntrack_expect.h> | |
21 | ||
e4bd8bce PM |
22 | #ifdef CONFIG_NF_CT_ACCT |
23 | static unsigned int | |
24 | seq_print_counters(struct seq_file *s, | |
25 | const struct ip_conntrack_counter *counter) | |
26 | { | |
27 | return seq_printf(s, "packets=%llu bytes=%llu ", | |
28 | (unsigned long long)counter->packets, | |
29 | (unsigned long long)counter->bytes); | |
30 | } | |
31 | #else | |
32 | #define seq_print_counters(x, y) 0 | |
33 | #endif | |
34 | ||
35 | struct ct_iter_state { | |
36 | unsigned int bucket; | |
37 | }; | |
38 | ||
f205c5e0 | 39 | static struct hlist_node *ct_get_first(struct seq_file *seq) |
e4bd8bce PM |
40 | { |
41 | struct ct_iter_state *st = seq->private; | |
42 | ||
43 | for (st->bucket = 0; | |
44 | st->bucket < nf_conntrack_htable_size; | |
45 | st->bucket++) { | |
f205c5e0 PM |
46 | if (!hlist_empty(&nf_conntrack_hash[st->bucket])) |
47 | return nf_conntrack_hash[st->bucket].first; | |
e4bd8bce PM |
48 | } |
49 | return NULL; | |
50 | } | |
51 | ||
f205c5e0 PM |
52 | static struct hlist_node *ct_get_next(struct seq_file *seq, |
53 | struct hlist_node *head) | |
e4bd8bce PM |
54 | { |
55 | struct ct_iter_state *st = seq->private; | |
56 | ||
57 | head = head->next; | |
f205c5e0 | 58 | while (head == NULL) { |
e4bd8bce PM |
59 | if (++st->bucket >= nf_conntrack_htable_size) |
60 | return NULL; | |
f205c5e0 | 61 | head = nf_conntrack_hash[st->bucket].first; |
e4bd8bce PM |
62 | } |
63 | return head; | |
64 | } | |
65 | ||
f205c5e0 | 66 | static struct hlist_node *ct_get_idx(struct seq_file *seq, loff_t pos) |
e4bd8bce | 67 | { |
f205c5e0 | 68 | struct hlist_node *head = ct_get_first(seq); |
e4bd8bce PM |
69 | |
70 | if (head) | |
71 | while (pos && (head = ct_get_next(seq, head))) | |
72 | pos--; | |
73 | return pos ? NULL : head; | |
74 | } | |
75 | ||
76 | static void *ct_seq_start(struct seq_file *seq, loff_t *pos) | |
77 | { | |
78 | read_lock_bh(&nf_conntrack_lock); | |
79 | return ct_get_idx(seq, *pos); | |
80 | } | |
81 | ||
82 | static void *ct_seq_next(struct seq_file *s, void *v, loff_t *pos) | |
83 | { | |
84 | (*pos)++; | |
85 | return ct_get_next(s, v); | |
86 | } | |
87 | ||
88 | static void ct_seq_stop(struct seq_file *s, void *v) | |
89 | { | |
90 | read_unlock_bh(&nf_conntrack_lock); | |
91 | } | |
92 | ||
93 | static int ct_seq_show(struct seq_file *s, void *v) | |
94 | { | |
95 | const struct nf_conntrack_tuple_hash *hash = v; | |
96 | const struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(hash); | |
97 | struct nf_conntrack_l3proto *l3proto; | |
98 | struct nf_conntrack_l4proto *l4proto; | |
99 | ||
100 | NF_CT_ASSERT(ct); | |
101 | ||
102 | /* we only want to print DIR_ORIGINAL */ | |
103 | if (NF_CT_DIRECTION(hash)) | |
104 | return 0; | |
105 | if (ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.l3num != AF_INET) | |
106 | return 0; | |
107 | ||
108 | l3proto = __nf_ct_l3proto_find(ct->tuplehash[IP_CT_DIR_ORIGINAL] | |
109 | .tuple.src.l3num); | |
110 | NF_CT_ASSERT(l3proto); | |
111 | l4proto = __nf_ct_l4proto_find(ct->tuplehash[IP_CT_DIR_ORIGINAL] | |
112 | .tuple.src.l3num, | |
113 | ct->tuplehash[IP_CT_DIR_ORIGINAL] | |
114 | .tuple.dst.protonum); | |
115 | NF_CT_ASSERT(l4proto); | |
116 | ||
117 | if (seq_printf(s, "%-8s %u %ld ", | |
118 | l4proto->name, | |
119 | ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.protonum, | |
120 | timer_pending(&ct->timeout) | |
121 | ? (long)(ct->timeout.expires - jiffies)/HZ : 0) != 0) | |
122 | return -ENOSPC; | |
123 | ||
124 | if (l3proto->print_conntrack(s, ct)) | |
125 | return -ENOSPC; | |
126 | ||
127 | if (l4proto->print_conntrack(s, ct)) | |
128 | return -ENOSPC; | |
129 | ||
130 | if (print_tuple(s, &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple, | |
131 | l3proto, l4proto)) | |
132 | return -ENOSPC; | |
133 | ||
e905a9ed | 134 | if (seq_print_counters(s, &ct->counters[IP_CT_DIR_ORIGINAL])) |
e4bd8bce PM |
135 | return -ENOSPC; |
136 | ||
137 | if (!(test_bit(IPS_SEEN_REPLY_BIT, &ct->status))) | |
138 | if (seq_printf(s, "[UNREPLIED] ")) | |
139 | return -ENOSPC; | |
140 | ||
141 | if (print_tuple(s, &ct->tuplehash[IP_CT_DIR_REPLY].tuple, | |
142 | l3proto, l4proto)) | |
143 | return -ENOSPC; | |
144 | ||
e905a9ed | 145 | if (seq_print_counters(s, &ct->counters[IP_CT_DIR_REPLY])) |
e4bd8bce PM |
146 | return -ENOSPC; |
147 | ||
148 | if (test_bit(IPS_ASSURED_BIT, &ct->status)) | |
149 | if (seq_printf(s, "[ASSURED] ")) | |
150 | return -ENOSPC; | |
151 | ||
152 | #ifdef CONFIG_NF_CONNTRACK_MARK | |
153 | if (seq_printf(s, "mark=%u ", ct->mark)) | |
154 | return -ENOSPC; | |
155 | #endif | |
156 | ||
157 | #ifdef CONFIG_NF_CONNTRACK_SECMARK | |
158 | if (seq_printf(s, "secmark=%u ", ct->secmark)) | |
159 | return -ENOSPC; | |
160 | #endif | |
161 | ||
162 | if (seq_printf(s, "use=%u\n", atomic_read(&ct->ct_general.use))) | |
163 | return -ENOSPC; | |
164 | ||
165 | return 0; | |
166 | } | |
167 | ||
56b3d975 | 168 | static const struct seq_operations ct_seq_ops = { |
e4bd8bce PM |
169 | .start = ct_seq_start, |
170 | .next = ct_seq_next, | |
171 | .stop = ct_seq_stop, | |
172 | .show = ct_seq_show | |
173 | }; | |
174 | ||
175 | static int ct_open(struct inode *inode, struct file *file) | |
176 | { | |
177 | struct seq_file *seq; | |
178 | struct ct_iter_state *st; | |
179 | int ret; | |
180 | ||
dd00cc48 | 181 | st = kzalloc(sizeof(struct ct_iter_state), GFP_KERNEL); |
e4bd8bce PM |
182 | if (st == NULL) |
183 | return -ENOMEM; | |
184 | ret = seq_open(file, &ct_seq_ops); | |
185 | if (ret) | |
186 | goto out_free; | |
187 | seq = file->private_data; | |
188 | seq->private = st; | |
e4bd8bce PM |
189 | return ret; |
190 | out_free: | |
191 | kfree(st); | |
192 | return ret; | |
193 | } | |
194 | ||
9a32144e | 195 | static const struct file_operations ct_file_ops = { |
e4bd8bce PM |
196 | .owner = THIS_MODULE, |
197 | .open = ct_open, | |
198 | .read = seq_read, | |
199 | .llseek = seq_lseek, | |
200 | .release = seq_release_private, | |
201 | }; | |
202 | ||
203 | /* expects */ | |
5d08ad44 PM |
204 | struct ct_expect_iter_state { |
205 | unsigned int bucket; | |
206 | }; | |
207 | ||
208 | static struct hlist_node *ct_expect_get_first(struct seq_file *seq) | |
e4bd8bce | 209 | { |
5d08ad44 | 210 | struct ct_expect_iter_state *st = seq->private; |
e4bd8bce | 211 | |
5d08ad44 PM |
212 | for (st->bucket = 0; st->bucket < nf_ct_expect_hsize; st->bucket++) { |
213 | if (!hlist_empty(&nf_ct_expect_hash[st->bucket])) | |
214 | return nf_ct_expect_hash[st->bucket].first; | |
215 | } | |
216 | return NULL; | |
217 | } | |
e4bd8bce | 218 | |
5d08ad44 PM |
219 | static struct hlist_node *ct_expect_get_next(struct seq_file *seq, |
220 | struct hlist_node *head) | |
221 | { | |
222 | struct ct_expect_iter_state *st = seq->private; | |
e4bd8bce | 223 | |
5d08ad44 PM |
224 | head = head->next; |
225 | while (head == NULL) { | |
226 | if (++st->bucket >= nf_ct_expect_hsize) | |
e4bd8bce | 227 | return NULL; |
5d08ad44 | 228 | head = nf_ct_expect_hash[st->bucket].first; |
e4bd8bce | 229 | } |
5d08ad44 | 230 | return head; |
e4bd8bce PM |
231 | } |
232 | ||
5d08ad44 | 233 | static struct hlist_node *ct_expect_get_idx(struct seq_file *seq, loff_t pos) |
e4bd8bce | 234 | { |
5d08ad44 | 235 | struct hlist_node *head = ct_expect_get_first(seq); |
e4bd8bce | 236 | |
5d08ad44 PM |
237 | if (head) |
238 | while (pos && (head = ct_expect_get_next(seq, head))) | |
239 | pos--; | |
240 | return pos ? NULL : head; | |
241 | } | |
e4bd8bce | 242 | |
5d08ad44 PM |
243 | static void *exp_seq_start(struct seq_file *seq, loff_t *pos) |
244 | { | |
245 | read_lock_bh(&nf_conntrack_lock); | |
246 | return ct_expect_get_idx(seq, *pos); | |
247 | } | |
e4bd8bce | 248 | |
5d08ad44 PM |
249 | static void *exp_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
250 | { | |
251 | (*pos)++; | |
252 | return ct_expect_get_next(seq, v); | |
e4bd8bce PM |
253 | } |
254 | ||
5d08ad44 | 255 | static void exp_seq_stop(struct seq_file *seq, void *v) |
e4bd8bce PM |
256 | { |
257 | read_unlock_bh(&nf_conntrack_lock); | |
258 | } | |
259 | ||
260 | static int exp_seq_show(struct seq_file *s, void *v) | |
261 | { | |
5d08ad44 PM |
262 | struct nf_conntrack_expect *exp; |
263 | struct hlist_node *n = v; | |
264 | ||
265 | exp = hlist_entry(n, struct nf_conntrack_expect, hnode); | |
e4bd8bce PM |
266 | |
267 | if (exp->tuple.src.l3num != AF_INET) | |
268 | return 0; | |
269 | ||
270 | if (exp->timeout.function) | |
271 | seq_printf(s, "%ld ", timer_pending(&exp->timeout) | |
272 | ? (long)(exp->timeout.expires - jiffies)/HZ : 0); | |
273 | else | |
274 | seq_printf(s, "- "); | |
275 | ||
276 | seq_printf(s, "proto=%u ", exp->tuple.dst.protonum); | |
277 | ||
278 | print_tuple(s, &exp->tuple, | |
279 | __nf_ct_l3proto_find(exp->tuple.src.l3num), | |
280 | __nf_ct_l4proto_find(exp->tuple.src.l3num, | |
e905a9ed | 281 | exp->tuple.dst.protonum)); |
e4bd8bce PM |
282 | return seq_putc(s, '\n'); |
283 | } | |
284 | ||
56b3d975 | 285 | static const struct seq_operations exp_seq_ops = { |
e4bd8bce PM |
286 | .start = exp_seq_start, |
287 | .next = exp_seq_next, | |
288 | .stop = exp_seq_stop, | |
289 | .show = exp_seq_show | |
290 | }; | |
291 | ||
292 | static int exp_open(struct inode *inode, struct file *file) | |
293 | { | |
5d08ad44 PM |
294 | struct seq_file *seq; |
295 | struct ct_expect_iter_state *st; | |
296 | int ret; | |
297 | ||
8adc5465 MK |
298 | st = kzalloc(sizeof(struct ct_expect_iter_state), GFP_KERNEL); |
299 | if (!st) | |
5d08ad44 PM |
300 | return -ENOMEM; |
301 | ret = seq_open(file, &exp_seq_ops); | |
302 | if (ret) | |
303 | goto out_free; | |
304 | seq = file->private_data; | |
305 | seq->private = st; | |
5d08ad44 PM |
306 | return ret; |
307 | out_free: | |
308 | kfree(st); | |
309 | return ret; | |
e4bd8bce PM |
310 | } |
311 | ||
9a32144e | 312 | static const struct file_operations ip_exp_file_ops = { |
e4bd8bce PM |
313 | .owner = THIS_MODULE, |
314 | .open = exp_open, | |
315 | .read = seq_read, | |
316 | .llseek = seq_lseek, | |
5d08ad44 | 317 | .release = seq_release_private, |
e4bd8bce PM |
318 | }; |
319 | ||
320 | static void *ct_cpu_seq_start(struct seq_file *seq, loff_t *pos) | |
321 | { | |
322 | int cpu; | |
323 | ||
324 | if (*pos == 0) | |
325 | return SEQ_START_TOKEN; | |
326 | ||
327 | for (cpu = *pos-1; cpu < NR_CPUS; ++cpu) { | |
328 | if (!cpu_possible(cpu)) | |
329 | continue; | |
330 | *pos = cpu+1; | |
331 | return &per_cpu(nf_conntrack_stat, cpu); | |
332 | } | |
333 | ||
334 | return NULL; | |
335 | } | |
336 | ||
337 | static void *ct_cpu_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
338 | { | |
339 | int cpu; | |
340 | ||
341 | for (cpu = *pos; cpu < NR_CPUS; ++cpu) { | |
342 | if (!cpu_possible(cpu)) | |
343 | continue; | |
344 | *pos = cpu+1; | |
345 | return &per_cpu(nf_conntrack_stat, cpu); | |
346 | } | |
347 | ||
348 | return NULL; | |
349 | } | |
350 | ||
351 | static void ct_cpu_seq_stop(struct seq_file *seq, void *v) | |
352 | { | |
353 | } | |
354 | ||
355 | static int ct_cpu_seq_show(struct seq_file *seq, void *v) | |
356 | { | |
357 | unsigned int nr_conntracks = atomic_read(&nf_conntrack_count); | |
358 | struct ip_conntrack_stat *st = v; | |
359 | ||
360 | if (v == SEQ_START_TOKEN) { | |
361 | 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\n"); | |
362 | return 0; | |
363 | } | |
364 | ||
365 | seq_printf(seq, "%08x %08x %08x %08x %08x %08x %08x %08x " | |
366 | "%08x %08x %08x %08x %08x %08x %08x %08x \n", | |
367 | nr_conntracks, | |
368 | st->searched, | |
369 | st->found, | |
370 | st->new, | |
371 | st->invalid, | |
372 | st->ignore, | |
373 | st->delete, | |
374 | st->delete_list, | |
375 | st->insert, | |
376 | st->insert_failed, | |
377 | st->drop, | |
378 | st->early_drop, | |
379 | st->error, | |
380 | ||
381 | st->expect_new, | |
382 | st->expect_create, | |
383 | st->expect_delete | |
384 | ); | |
385 | return 0; | |
386 | } | |
387 | ||
56b3d975 | 388 | static const struct seq_operations ct_cpu_seq_ops = { |
e4bd8bce PM |
389 | .start = ct_cpu_seq_start, |
390 | .next = ct_cpu_seq_next, | |
391 | .stop = ct_cpu_seq_stop, | |
392 | .show = ct_cpu_seq_show, | |
393 | }; | |
394 | ||
395 | static int ct_cpu_seq_open(struct inode *inode, struct file *file) | |
396 | { | |
397 | return seq_open(file, &ct_cpu_seq_ops); | |
398 | } | |
399 | ||
9a32144e | 400 | static const struct file_operations ct_cpu_seq_fops = { |
e4bd8bce PM |
401 | .owner = THIS_MODULE, |
402 | .open = ct_cpu_seq_open, | |
403 | .read = seq_read, | |
404 | .llseek = seq_lseek, | |
405 | .release = seq_release_private, | |
406 | }; | |
407 | ||
408 | int __init nf_conntrack_ipv4_compat_init(void) | |
409 | { | |
410 | struct proc_dir_entry *proc, *proc_exp, *proc_stat; | |
411 | ||
457c4cbc | 412 | proc = proc_net_fops_create(&init_net, "ip_conntrack", 0440, &ct_file_ops); |
e4bd8bce PM |
413 | if (!proc) |
414 | goto err1; | |
415 | ||
457c4cbc | 416 | proc_exp = proc_net_fops_create(&init_net, "ip_conntrack_expect", 0440, |
e4bd8bce PM |
417 | &ip_exp_file_ops); |
418 | if (!proc_exp) | |
419 | goto err2; | |
420 | ||
457c4cbc | 421 | proc_stat = create_proc_entry("ip_conntrack", S_IRUGO, init_net.proc_net_stat); |
e4bd8bce PM |
422 | if (!proc_stat) |
423 | goto err3; | |
424 | ||
425 | proc_stat->proc_fops = &ct_cpu_seq_fops; | |
426 | proc_stat->owner = THIS_MODULE; | |
427 | ||
428 | return 0; | |
429 | ||
430 | err3: | |
457c4cbc | 431 | proc_net_remove(&init_net, "ip_conntrack_expect"); |
e4bd8bce | 432 | err2: |
457c4cbc | 433 | proc_net_remove(&init_net, "ip_conntrack"); |
e4bd8bce PM |
434 | err1: |
435 | return -ENOMEM; | |
436 | } | |
437 | ||
438 | void __exit nf_conntrack_ipv4_compat_fini(void) | |
439 | { | |
457c4cbc EB |
440 | remove_proc_entry("ip_conntrack", init_net.proc_net_stat); |
441 | proc_net_remove(&init_net, "ip_conntrack_expect"); | |
442 | proc_net_remove(&init_net, "ip_conntrack"); | |
e4bd8bce | 443 | } |