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