Commit | Line | Data |
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457c8996 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
f6ebe77f HW |
2 | #include <linux/kernel.h> |
3 | #include <linux/init.h> | |
4 | #include <linux/module.h> | |
5 | #include <linux/proc_fs.h> | |
6 | #include <linux/skbuff.h> | |
7 | #include <linux/netfilter.h> | |
bbd86b9f | 8 | #include <linux/seq_file.h> |
f6ebe77f | 9 | #include <net/protocol.h> |
f01ffbd6 | 10 | #include <net/netfilter/nf_log.h> |
f6ebe77f HW |
11 | |
12 | #include "nf_internals.h" | |
13 | ||
a5d29264 | 14 | /* Internal logging interface, which relies on the real |
f6ebe77f HW |
15 | LOG target modules */ |
16 | ||
17625274 | 17 | #define NFLOGGER_NAME_LEN 64 |
f6ebe77f | 18 | |
2851940f MK |
19 | int sysctl_nf_log_all_netns __read_mostly; |
20 | EXPORT_SYMBOL(sysctl_nf_log_all_netns); | |
21 | ||
5962815a | 22 | static struct nf_logger __rcu *loggers[NFPROTO_NUMPROTO][NF_LOG_TYPE_MAX] __read_mostly; |
9b73534d | 23 | static DEFINE_MUTEX(nf_log_mutex); |
f6ebe77f | 24 | |
0c26ed1c ML |
25 | #define nft_log_dereference(logger) \ |
26 | rcu_dereference_protected(logger, lockdep_is_held(&nf_log_mutex)) | |
27 | ||
ca735b3a | 28 | static struct nf_logger *__find_logger(int pf, const char *str_logger) |
f6ebe77f | 29 | { |
5962815a PNA |
30 | struct nf_logger *log; |
31 | int i; | |
32 | ||
33 | for (i = 0; i < NF_LOG_TYPE_MAX; i++) { | |
34 | if (loggers[pf][i] == NULL) | |
35 | continue; | |
f6ebe77f | 36 | |
0c26ed1c | 37 | log = nft_log_dereference(loggers[pf][i]); |
18082746 | 38 | if (!strncasecmp(str_logger, log->name, strlen(log->name))) |
5962815a | 39 | return log; |
ca735b3a | 40 | } |
d72367b6 | 41 | |
ca735b3a | 42 | return NULL; |
601e68e1 | 43 | } |
f6ebe77f | 44 | |
779994fa | 45 | int nf_log_set(struct net *net, u_int8_t pf, const struct nf_logger *logger) |
30e0c6a6 G |
46 | { |
47 | const struct nf_logger *log; | |
48 | ||
779994fa GF |
49 | if (pf == NFPROTO_UNSPEC || pf >= ARRAY_SIZE(net->nf.nf_loggers)) |
50 | return -EOPNOTSUPP; | |
30e0c6a6 G |
51 | |
52 | mutex_lock(&nf_log_mutex); | |
0c26ed1c | 53 | log = nft_log_dereference(net->nf.nf_loggers[pf]); |
30e0c6a6 G |
54 | if (log == NULL) |
55 | rcu_assign_pointer(net->nf.nf_loggers[pf], logger); | |
56 | ||
57 | mutex_unlock(&nf_log_mutex); | |
779994fa GF |
58 | |
59 | return 0; | |
30e0c6a6 G |
60 | } |
61 | EXPORT_SYMBOL(nf_log_set); | |
62 | ||
63 | void nf_log_unset(struct net *net, const struct nf_logger *logger) | |
64 | { | |
65 | int i; | |
66 | const struct nf_logger *log; | |
67 | ||
30e0c6a6 G |
68 | mutex_lock(&nf_log_mutex); |
69 | for (i = 0; i < NFPROTO_NUMPROTO; i++) { | |
0c26ed1c | 70 | log = nft_log_dereference(net->nf.nf_loggers[i]); |
30e0c6a6 G |
71 | if (log == logger) |
72 | RCU_INIT_POINTER(net->nf.nf_loggers[i], NULL); | |
73 | } | |
74 | mutex_unlock(&nf_log_mutex); | |
30e0c6a6 G |
75 | } |
76 | EXPORT_SYMBOL(nf_log_unset); | |
77 | ||
d93cf068 | 78 | /* return EEXIST if the same logger is registered, 0 on success. */ |
ca735b3a | 79 | int nf_log_register(u_int8_t pf, struct nf_logger *logger) |
f6ebe77f | 80 | { |
b6f0a365 | 81 | int i; |
8ac2bde2 | 82 | int ret = 0; |
ca735b3a | 83 | |
30e0c6a6 | 84 | if (pf >= ARRAY_SIZE(init_net.nf.nf_loggers)) |
ca735b3a EL |
85 | return -EINVAL; |
86 | ||
9b73534d | 87 | mutex_lock(&nf_log_mutex); |
ca735b3a EL |
88 | |
89 | if (pf == NFPROTO_UNSPEC) { | |
8ac2bde2 ML |
90 | for (i = NFPROTO_UNSPEC; i < NFPROTO_NUMPROTO; i++) { |
91 | if (rcu_access_pointer(loggers[i][logger->type])) { | |
92 | ret = -EEXIST; | |
93 | goto unlock; | |
94 | } | |
95 | } | |
ca735b3a | 96 | for (i = NFPROTO_UNSPEC; i < NFPROTO_NUMPROTO; i++) |
5962815a | 97 | rcu_assign_pointer(loggers[i][logger->type], logger); |
ca735b3a | 98 | } else { |
8ac2bde2 ML |
99 | if (rcu_access_pointer(loggers[pf][logger->type])) { |
100 | ret = -EEXIST; | |
101 | goto unlock; | |
102 | } | |
5962815a | 103 | rcu_assign_pointer(loggers[pf][logger->type], logger); |
ca735b3a EL |
104 | } |
105 | ||
8ac2bde2 | 106 | unlock: |
9b73534d | 107 | mutex_unlock(&nf_log_mutex); |
8ac2bde2 | 108 | return ret; |
f6ebe77f | 109 | } |
ca735b3a | 110 | EXPORT_SYMBOL(nf_log_register); |
f6ebe77f | 111 | |
ca735b3a | 112 | void nf_log_unregister(struct nf_logger *logger) |
f6ebe77f | 113 | { |
205ee117 | 114 | const struct nf_logger *log; |
f6ebe77f HW |
115 | int i; |
116 | ||
9b73534d | 117 | mutex_lock(&nf_log_mutex); |
205ee117 FW |
118 | for (i = 0; i < NFPROTO_NUMPROTO; i++) { |
119 | log = nft_log_dereference(loggers[i][logger->type]); | |
120 | if (log == logger) | |
121 | RCU_INIT_POINTER(loggers[i][logger->type], NULL); | |
122 | } | |
9b73534d | 123 | mutex_unlock(&nf_log_mutex); |
ad5001cc | 124 | synchronize_rcu(); |
f6ebe77f | 125 | } |
e92ad99c | 126 | EXPORT_SYMBOL(nf_log_unregister); |
f6ebe77f | 127 | |
30e0c6a6 G |
128 | int nf_log_bind_pf(struct net *net, u_int8_t pf, |
129 | const struct nf_logger *logger) | |
ca735b3a | 130 | { |
30e0c6a6 | 131 | if (pf >= ARRAY_SIZE(net->nf.nf_loggers)) |
9ef0298a | 132 | return -EINVAL; |
ca735b3a EL |
133 | mutex_lock(&nf_log_mutex); |
134 | if (__find_logger(pf, logger->name) == NULL) { | |
135 | mutex_unlock(&nf_log_mutex); | |
136 | return -ENOENT; | |
137 | } | |
30e0c6a6 | 138 | rcu_assign_pointer(net->nf.nf_loggers[pf], logger); |
ca735b3a EL |
139 | mutex_unlock(&nf_log_mutex); |
140 | return 0; | |
141 | } | |
142 | EXPORT_SYMBOL(nf_log_bind_pf); | |
143 | ||
30e0c6a6 | 144 | void nf_log_unbind_pf(struct net *net, u_int8_t pf) |
ca735b3a | 145 | { |
30e0c6a6 | 146 | if (pf >= ARRAY_SIZE(net->nf.nf_loggers)) |
9ef0298a | 147 | return; |
ca735b3a | 148 | mutex_lock(&nf_log_mutex); |
30e0c6a6 | 149 | RCU_INIT_POINTER(net->nf.nf_loggers[pf], NULL); |
ca735b3a EL |
150 | mutex_unlock(&nf_log_mutex); |
151 | } | |
152 | EXPORT_SYMBOL(nf_log_unbind_pf); | |
153 | ||
fab4085f PNA |
154 | int nf_logger_find_get(int pf, enum nf_log_type type) |
155 | { | |
156 | struct nf_logger *logger; | |
157 | int ret = -ENOENT; | |
158 | ||
f3bb5333 LZ |
159 | if (pf == NFPROTO_INET) { |
160 | ret = nf_logger_find_get(NFPROTO_IPV4, type); | |
161 | if (ret < 0) | |
162 | return ret; | |
163 | ||
164 | ret = nf_logger_find_get(NFPROTO_IPV6, type); | |
165 | if (ret < 0) { | |
166 | nf_logger_put(NFPROTO_IPV4, type); | |
167 | return ret; | |
168 | } | |
169 | ||
170 | return 0; | |
171 | } | |
172 | ||
fab4085f PNA |
173 | rcu_read_lock(); |
174 | logger = rcu_dereference(loggers[pf][type]); | |
175 | if (logger == NULL) | |
176 | goto out; | |
177 | ||
7e53e7f8 | 178 | if (try_module_get(logger->me)) |
fab4085f PNA |
179 | ret = 0; |
180 | out: | |
181 | rcu_read_unlock(); | |
182 | return ret; | |
183 | } | |
184 | EXPORT_SYMBOL_GPL(nf_logger_find_get); | |
185 | ||
186 | void nf_logger_put(int pf, enum nf_log_type type) | |
187 | { | |
188 | struct nf_logger *logger; | |
189 | ||
f3bb5333 LZ |
190 | if (pf == NFPROTO_INET) { |
191 | nf_logger_put(NFPROTO_IPV4, type); | |
192 | nf_logger_put(NFPROTO_IPV6, type); | |
193 | return; | |
194 | } | |
195 | ||
fab4085f PNA |
196 | BUG_ON(loggers[pf][type] == NULL); |
197 | ||
198 | rcu_read_lock(); | |
199 | logger = rcu_dereference(loggers[pf][type]); | |
200 | module_put(logger->me); | |
201 | rcu_read_unlock(); | |
202 | } | |
203 | EXPORT_SYMBOL_GPL(nf_logger_put); | |
204 | ||
30e0c6a6 G |
205 | void nf_log_packet(struct net *net, |
206 | u_int8_t pf, | |
f6ebe77f HW |
207 | unsigned int hooknum, |
208 | const struct sk_buff *skb, | |
209 | const struct net_device *in, | |
210 | const struct net_device *out, | |
7b2f9631 | 211 | const struct nf_loginfo *loginfo, |
f6ebe77f HW |
212 | const char *fmt, ...) |
213 | { | |
214 | va_list args; | |
215 | char prefix[NF_LOG_PREFIXLEN]; | |
7b2f9631 | 216 | const struct nf_logger *logger; |
601e68e1 | 217 | |
f6ebe77f | 218 | rcu_read_lock(); |
fab4085f PNA |
219 | if (loginfo != NULL) |
220 | logger = rcu_dereference(loggers[pf][loginfo->type]); | |
221 | else | |
222 | logger = rcu_dereference(net->nf.nf_loggers[pf]); | |
223 | ||
f6ebe77f HW |
224 | if (logger) { |
225 | va_start(args, fmt); | |
226 | vsnprintf(prefix, sizeof(prefix), fmt, args); | |
227 | va_end(args); | |
8cdb46da | 228 | logger->logfn(net, pf, hooknum, skb, in, out, loginfo, prefix); |
f6ebe77f HW |
229 | } |
230 | rcu_read_unlock(); | |
231 | } | |
232 | EXPORT_SYMBOL(nf_log_packet); | |
233 | ||
4017a7ee PNA |
234 | void nf_log_trace(struct net *net, |
235 | u_int8_t pf, | |
236 | unsigned int hooknum, | |
237 | const struct sk_buff *skb, | |
238 | const struct net_device *in, | |
239 | const struct net_device *out, | |
240 | const struct nf_loginfo *loginfo, const char *fmt, ...) | |
241 | { | |
242 | va_list args; | |
243 | char prefix[NF_LOG_PREFIXLEN]; | |
244 | const struct nf_logger *logger; | |
245 | ||
246 | rcu_read_lock(); | |
247 | logger = rcu_dereference(net->nf.nf_loggers[pf]); | |
248 | if (logger) { | |
249 | va_start(args, fmt); | |
250 | vsnprintf(prefix, sizeof(prefix), fmt, args); | |
251 | va_end(args); | |
252 | logger->logfn(net, pf, hooknum, skb, in, out, loginfo, prefix); | |
253 | } | |
254 | rcu_read_unlock(); | |
255 | } | |
256 | EXPORT_SYMBOL(nf_log_trace); | |
257 | ||
27fd8d90 PNA |
258 | #define S_SIZE (1024 - (sizeof(unsigned int) + 1)) |
259 | ||
260 | struct nf_log_buf { | |
261 | unsigned int count; | |
262 | char buf[S_SIZE + 1]; | |
263 | }; | |
264 | static struct nf_log_buf emergency, *emergency_ptr = &emergency; | |
265 | ||
266 | __printf(2, 3) int nf_log_buf_add(struct nf_log_buf *m, const char *f, ...) | |
267 | { | |
268 | va_list args; | |
269 | int len; | |
270 | ||
271 | if (likely(m->count < S_SIZE)) { | |
272 | va_start(args, f); | |
273 | len = vsnprintf(m->buf + m->count, S_SIZE - m->count, f, args); | |
274 | va_end(args); | |
275 | if (likely(m->count + len < S_SIZE)) { | |
276 | m->count += len; | |
277 | return 0; | |
278 | } | |
279 | } | |
280 | m->count = S_SIZE; | |
281 | printk_once(KERN_ERR KBUILD_MODNAME " please increase S_SIZE\n"); | |
282 | return -1; | |
283 | } | |
284 | EXPORT_SYMBOL_GPL(nf_log_buf_add); | |
285 | ||
286 | struct nf_log_buf *nf_log_buf_open(void) | |
287 | { | |
288 | struct nf_log_buf *m = kmalloc(sizeof(*m), GFP_ATOMIC); | |
289 | ||
290 | if (unlikely(!m)) { | |
291 | local_bh_disable(); | |
292 | do { | |
293 | m = xchg(&emergency_ptr, NULL); | |
294 | } while (!m); | |
295 | } | |
296 | m->count = 0; | |
297 | return m; | |
298 | } | |
299 | EXPORT_SYMBOL_GPL(nf_log_buf_open); | |
300 | ||
301 | void nf_log_buf_close(struct nf_log_buf *m) | |
302 | { | |
303 | m->buf[m->count] = 0; | |
304 | printk("%s\n", m->buf); | |
305 | ||
306 | if (likely(m != &emergency)) | |
307 | kfree(m); | |
308 | else { | |
309 | emergency_ptr = m; | |
310 | local_bh_enable(); | |
311 | } | |
312 | } | |
313 | EXPORT_SYMBOL_GPL(nf_log_buf_close); | |
314 | ||
f6ebe77f HW |
315 | #ifdef CONFIG_PROC_FS |
316 | static void *seq_start(struct seq_file *seq, loff_t *pos) | |
317 | { | |
30e0c6a6 G |
318 | struct net *net = seq_file_net(seq); |
319 | ||
6440fe05 | 320 | mutex_lock(&nf_log_mutex); |
f6ebe77f | 321 | |
30e0c6a6 | 322 | if (*pos >= ARRAY_SIZE(net->nf.nf_loggers)) |
f6ebe77f HW |
323 | return NULL; |
324 | ||
325 | return pos; | |
326 | } | |
327 | ||
328 | static void *seq_next(struct seq_file *s, void *v, loff_t *pos) | |
329 | { | |
30e0c6a6 G |
330 | struct net *net = seq_file_net(s); |
331 | ||
f6ebe77f HW |
332 | (*pos)++; |
333 | ||
30e0c6a6 | 334 | if (*pos >= ARRAY_SIZE(net->nf.nf_loggers)) |
f6ebe77f HW |
335 | return NULL; |
336 | ||
337 | return pos; | |
338 | } | |
339 | ||
340 | static void seq_stop(struct seq_file *s, void *v) | |
341 | { | |
6440fe05 | 342 | mutex_unlock(&nf_log_mutex); |
f6ebe77f HW |
343 | } |
344 | ||
345 | static int seq_show(struct seq_file *s, void *v) | |
346 | { | |
347 | loff_t *pos = v; | |
348 | const struct nf_logger *logger; | |
e71456ae | 349 | int i; |
30e0c6a6 | 350 | struct net *net = seq_file_net(s); |
f6ebe77f | 351 | |
0c26ed1c | 352 | logger = nft_log_dereference(net->nf.nf_loggers[*pos]); |
f6ebe77f HW |
353 | |
354 | if (!logger) | |
e71456ae | 355 | seq_printf(s, "%2lld NONE (", *pos); |
c7a913cd | 356 | else |
e71456ae | 357 | seq_printf(s, "%2lld %s (", *pos, logger->name); |
c7a913cd | 358 | |
e71456ae SRRH |
359 | if (seq_has_overflowed(s)) |
360 | return -ENOSPC; | |
c7a913cd | 361 | |
5962815a PNA |
362 | for (i = 0; i < NF_LOG_TYPE_MAX; i++) { |
363 | if (loggers[*pos][i] == NULL) | |
364 | continue; | |
365 | ||
0c26ed1c | 366 | logger = nft_log_dereference(loggers[*pos][i]); |
eca27f14 | 367 | seq_puts(s, logger->name); |
e71456ae | 368 | if (i == 0 && loggers[*pos][i + 1] != NULL) |
cdec2685 | 369 | seq_puts(s, ","); |
e71456ae SRRH |
370 | |
371 | if (seq_has_overflowed(s)) | |
372 | return -ENOSPC; | |
c7a913cd | 373 | } |
601e68e1 | 374 | |
cdec2685 | 375 | seq_puts(s, ")\n"); |
e71456ae SRRH |
376 | |
377 | if (seq_has_overflowed(s)) | |
378 | return -ENOSPC; | |
379 | return 0; | |
f6ebe77f HW |
380 | } |
381 | ||
56b3d975 | 382 | static const struct seq_operations nflog_seq_ops = { |
f6ebe77f HW |
383 | .start = seq_start, |
384 | .next = seq_next, | |
385 | .stop = seq_stop, | |
386 | .show = seq_show, | |
387 | }; | |
f6ebe77f HW |
388 | #endif /* PROC_FS */ |
389 | ||
17625274 | 390 | #ifdef CONFIG_SYSCTL |
17625274 EL |
391 | static char nf_log_sysctl_fnames[NFPROTO_NUMPROTO-NFPROTO_UNSPEC][3]; |
392 | static struct ctl_table nf_log_sysctl_table[NFPROTO_NUMPROTO+1]; | |
2851940f MK |
393 | static struct ctl_table_header *nf_log_sysctl_fhdr; |
394 | ||
395 | static struct ctl_table nf_log_sysctl_ftable[] = { | |
396 | { | |
397 | .procname = "nf_log_all_netns", | |
398 | .data = &sysctl_nf_log_all_netns, | |
399 | .maxlen = sizeof(sysctl_nf_log_all_netns), | |
400 | .mode = 0644, | |
401 | .proc_handler = proc_dointvec, | |
402 | }, | |
403 | { } | |
404 | }; | |
f6ebe77f | 405 | |
fe2c6338 | 406 | static int nf_log_proc_dostring(struct ctl_table *table, int write, |
32927393 | 407 | void *buffer, size_t *lenp, loff_t *ppos) |
17625274 EL |
408 | { |
409 | const struct nf_logger *logger; | |
24955619 | 410 | char buf[NFLOGGER_NAME_LEN]; |
17625274 EL |
411 | int r = 0; |
412 | int tindex = (unsigned long)table->extra1; | |
dbb5918c | 413 | struct net *net = table->extra2; |
17625274 EL |
414 | |
415 | if (write) { | |
c6ac37d8 PT |
416 | struct ctl_table tmp = *table; |
417 | ||
dffd22ae JH |
418 | /* proc_dostring() can append to existing strings, so we need to |
419 | * initialize it as an empty string. | |
420 | */ | |
421 | buf[0] = '\0'; | |
c6ac37d8 PT |
422 | tmp.data = buf; |
423 | r = proc_dostring(&tmp, write, buffer, lenp, ppos); | |
424 | if (r) | |
425 | return r; | |
24955619 PM |
426 | |
427 | if (!strcmp(buf, "NONE")) { | |
30e0c6a6 | 428 | nf_log_unbind_pf(net, tindex); |
17625274 EL |
429 | return 0; |
430 | } | |
431 | mutex_lock(&nf_log_mutex); | |
24955619 | 432 | logger = __find_logger(tindex, buf); |
17625274 EL |
433 | if (logger == NULL) { |
434 | mutex_unlock(&nf_log_mutex); | |
435 | return -ENOENT; | |
436 | } | |
30e0c6a6 | 437 | rcu_assign_pointer(net->nf.nf_loggers[tindex], logger); |
17625274 EL |
438 | mutex_unlock(&nf_log_mutex); |
439 | } else { | |
ce00bf07 JH |
440 | struct ctl_table tmp = *table; |
441 | ||
442 | tmp.data = buf; | |
266d07cb | 443 | mutex_lock(&nf_log_mutex); |
0c26ed1c | 444 | logger = nft_log_dereference(net->nf.nf_loggers[tindex]); |
17625274 | 445 | if (!logger) |
ce00bf07 | 446 | strlcpy(buf, "NONE", sizeof(buf)); |
17625274 | 447 | else |
ce00bf07 | 448 | strlcpy(buf, logger->name, sizeof(buf)); |
266d07cb | 449 | mutex_unlock(&nf_log_mutex); |
ce00bf07 | 450 | r = proc_dostring(&tmp, write, buffer, lenp, ppos); |
17625274 EL |
451 | } |
452 | ||
453 | return r; | |
454 | } | |
455 | ||
30e0c6a6 | 456 | static int netfilter_log_sysctl_init(struct net *net) |
f6ebe77f | 457 | { |
ca735b3a | 458 | int i; |
30e0c6a6 G |
459 | struct ctl_table *table; |
460 | ||
461 | table = nf_log_sysctl_table; | |
462 | if (!net_eq(net, &init_net)) { | |
463 | table = kmemdup(nf_log_sysctl_table, | |
464 | sizeof(nf_log_sysctl_table), | |
465 | GFP_KERNEL); | |
466 | if (!table) | |
467 | goto err_alloc; | |
468 | } else { | |
469 | for (i = NFPROTO_UNSPEC; i < NFPROTO_NUMPROTO; i++) { | |
470 | snprintf(nf_log_sysctl_fnames[i], | |
471 | 3, "%d", i); | |
472 | nf_log_sysctl_table[i].procname = | |
473 | nf_log_sysctl_fnames[i]; | |
8aefc4d1 | 474 | nf_log_sysctl_table[i].maxlen = NFLOGGER_NAME_LEN; |
30e0c6a6 G |
475 | nf_log_sysctl_table[i].mode = 0644; |
476 | nf_log_sysctl_table[i].proc_handler = | |
477 | nf_log_proc_dostring; | |
478 | nf_log_sysctl_table[i].extra1 = | |
479 | (void *)(unsigned long) i; | |
480 | } | |
2851940f MK |
481 | nf_log_sysctl_fhdr = register_net_sysctl(net, "net/netfilter", |
482 | nf_log_sysctl_ftable); | |
483 | if (!nf_log_sysctl_fhdr) | |
484 | goto err_freg; | |
17625274 EL |
485 | } |
486 | ||
dbb5918c JH |
487 | for (i = NFPROTO_UNSPEC; i < NFPROTO_NUMPROTO; i++) |
488 | table[i].extra2 = net; | |
489 | ||
30e0c6a6 G |
490 | net->nf.nf_log_dir_header = register_net_sysctl(net, |
491 | "net/netfilter/nf_log", | |
492 | table); | |
493 | if (!net->nf.nf_log_dir_header) | |
494 | goto err_reg; | |
17625274 EL |
495 | |
496 | return 0; | |
30e0c6a6 G |
497 | |
498 | err_reg: | |
499 | if (!net_eq(net, &init_net)) | |
500 | kfree(table); | |
2851940f MK |
501 | else |
502 | unregister_net_sysctl_table(nf_log_sysctl_fhdr); | |
503 | err_freg: | |
30e0c6a6 G |
504 | err_alloc: |
505 | return -ENOMEM; | |
506 | } | |
507 | ||
508 | static void netfilter_log_sysctl_exit(struct net *net) | |
509 | { | |
510 | struct ctl_table *table; | |
511 | ||
512 | table = net->nf.nf_log_dir_header->ctl_table_arg; | |
513 | unregister_net_sysctl_table(net->nf.nf_log_dir_header); | |
514 | if (!net_eq(net, &init_net)) | |
515 | kfree(table); | |
2851940f MK |
516 | else |
517 | unregister_net_sysctl_table(nf_log_sysctl_fhdr); | |
17625274 EL |
518 | } |
519 | #else | |
30e0c6a6 | 520 | static int netfilter_log_sysctl_init(struct net *net) |
17625274 EL |
521 | { |
522 | return 0; | |
523 | } | |
30e0c6a6 G |
524 | |
525 | static void netfilter_log_sysctl_exit(struct net *net) | |
526 | { | |
527 | } | |
17625274 EL |
528 | #endif /* CONFIG_SYSCTL */ |
529 | ||
30e0c6a6 | 530 | static int __net_init nf_log_net_init(struct net *net) |
17625274 | 531 | { |
30e0c6a6 G |
532 | int ret = -ENOMEM; |
533 | ||
f6ebe77f | 534 | #ifdef CONFIG_PROC_FS |
c3506372 CH |
535 | if (!proc_create_net("nf_log", 0444, net->nf.proc_netfilter, |
536 | &nflog_seq_ops, sizeof(struct seq_net_private))) | |
30e0c6a6 | 537 | return ret; |
62243927 | 538 | #endif |
30e0c6a6 G |
539 | ret = netfilter_log_sysctl_init(net); |
540 | if (ret < 0) | |
541 | goto out_sysctl; | |
ca735b3a | 542 | |
30e0c6a6 G |
543 | return 0; |
544 | ||
545 | out_sysctl: | |
e778f56e | 546 | #ifdef CONFIG_PROC_FS |
6d11cfdb | 547 | remove_proc_entry("nf_log", net->nf.proc_netfilter); |
e778f56e | 548 | #endif |
30e0c6a6 G |
549 | return ret; |
550 | } | |
551 | ||
552 | static void __net_exit nf_log_net_exit(struct net *net) | |
553 | { | |
554 | netfilter_log_sysctl_exit(net); | |
e778f56e | 555 | #ifdef CONFIG_PROC_FS |
30e0c6a6 | 556 | remove_proc_entry("nf_log", net->nf.proc_netfilter); |
e778f56e | 557 | #endif |
30e0c6a6 G |
558 | } |
559 | ||
560 | static struct pernet_operations nf_log_net_ops = { | |
561 | .init = nf_log_net_init, | |
562 | .exit = nf_log_net_exit, | |
563 | }; | |
564 | ||
565 | int __init netfilter_log_init(void) | |
566 | { | |
5962815a | 567 | return register_pernet_subsys(&nf_log_net_ops); |
f6ebe77f | 568 | } |