Commit | Line | Data |
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f6ebe77f HW |
1 | #include <linux/kernel.h> |
2 | #include <linux/init.h> | |
3 | #include <linux/module.h> | |
4 | #include <linux/proc_fs.h> | |
5 | #include <linux/skbuff.h> | |
6 | #include <linux/netfilter.h> | |
bbd86b9f | 7 | #include <linux/seq_file.h> |
f6ebe77f | 8 | #include <net/protocol.h> |
f01ffbd6 | 9 | #include <net/netfilter/nf_log.h> |
f6ebe77f HW |
10 | |
11 | #include "nf_internals.h" | |
12 | ||
a5d29264 | 13 | /* Internal logging interface, which relies on the real |
f6ebe77f HW |
14 | LOG target modules */ |
15 | ||
16 | #define NF_LOG_PREFIXLEN 128 | |
17625274 | 17 | #define NFLOGGER_NAME_LEN 64 |
f6ebe77f | 18 | |
5962815a | 19 | static struct nf_logger __rcu *loggers[NFPROTO_NUMPROTO][NF_LOG_TYPE_MAX] __read_mostly; |
9b73534d | 20 | static DEFINE_MUTEX(nf_log_mutex); |
f6ebe77f | 21 | |
0c26ed1c ML |
22 | #define nft_log_dereference(logger) \ |
23 | rcu_dereference_protected(logger, lockdep_is_held(&nf_log_mutex)) | |
24 | ||
ca735b3a | 25 | static struct nf_logger *__find_logger(int pf, const char *str_logger) |
f6ebe77f | 26 | { |
5962815a PNA |
27 | struct nf_logger *log; |
28 | int i; | |
29 | ||
30 | for (i = 0; i < NF_LOG_TYPE_MAX; i++) { | |
31 | if (loggers[pf][i] == NULL) | |
32 | continue; | |
f6ebe77f | 33 | |
0c26ed1c | 34 | log = nft_log_dereference(loggers[pf][i]); |
18082746 | 35 | if (!strncasecmp(str_logger, log->name, strlen(log->name))) |
5962815a | 36 | return log; |
ca735b3a | 37 | } |
d72367b6 | 38 | |
ca735b3a | 39 | return NULL; |
601e68e1 | 40 | } |
f6ebe77f | 41 | |
30e0c6a6 G |
42 | void nf_log_set(struct net *net, u_int8_t pf, const struct nf_logger *logger) |
43 | { | |
44 | const struct nf_logger *log; | |
45 | ||
30e0c6a6 G |
46 | if (pf == NFPROTO_UNSPEC) |
47 | return; | |
48 | ||
49 | mutex_lock(&nf_log_mutex); | |
0c26ed1c | 50 | log = nft_log_dereference(net->nf.nf_loggers[pf]); |
30e0c6a6 G |
51 | if (log == NULL) |
52 | rcu_assign_pointer(net->nf.nf_loggers[pf], logger); | |
53 | ||
54 | mutex_unlock(&nf_log_mutex); | |
55 | } | |
56 | EXPORT_SYMBOL(nf_log_set); | |
57 | ||
58 | void nf_log_unset(struct net *net, const struct nf_logger *logger) | |
59 | { | |
60 | int i; | |
61 | const struct nf_logger *log; | |
62 | ||
30e0c6a6 G |
63 | mutex_lock(&nf_log_mutex); |
64 | for (i = 0; i < NFPROTO_NUMPROTO; i++) { | |
0c26ed1c | 65 | log = nft_log_dereference(net->nf.nf_loggers[i]); |
30e0c6a6 G |
66 | if (log == logger) |
67 | RCU_INIT_POINTER(net->nf.nf_loggers[i], NULL); | |
68 | } | |
69 | mutex_unlock(&nf_log_mutex); | |
70 | synchronize_rcu(); | |
71 | } | |
72 | EXPORT_SYMBOL(nf_log_unset); | |
73 | ||
d93cf068 | 74 | /* return EEXIST if the same logger is registered, 0 on success. */ |
ca735b3a | 75 | int nf_log_register(u_int8_t pf, struct nf_logger *logger) |
f6ebe77f | 76 | { |
b6f0a365 | 77 | int i; |
8ac2bde2 | 78 | int ret = 0; |
ca735b3a | 79 | |
30e0c6a6 | 80 | if (pf >= ARRAY_SIZE(init_net.nf.nf_loggers)) |
ca735b3a EL |
81 | return -EINVAL; |
82 | ||
9b73534d | 83 | mutex_lock(&nf_log_mutex); |
ca735b3a EL |
84 | |
85 | if (pf == NFPROTO_UNSPEC) { | |
8ac2bde2 ML |
86 | for (i = NFPROTO_UNSPEC; i < NFPROTO_NUMPROTO; i++) { |
87 | if (rcu_access_pointer(loggers[i][logger->type])) { | |
88 | ret = -EEXIST; | |
89 | goto unlock; | |
90 | } | |
91 | } | |
ca735b3a | 92 | for (i = NFPROTO_UNSPEC; i < NFPROTO_NUMPROTO; i++) |
5962815a | 93 | rcu_assign_pointer(loggers[i][logger->type], logger); |
ca735b3a | 94 | } else { |
8ac2bde2 ML |
95 | if (rcu_access_pointer(loggers[pf][logger->type])) { |
96 | ret = -EEXIST; | |
97 | goto unlock; | |
98 | } | |
5962815a | 99 | rcu_assign_pointer(loggers[pf][logger->type], logger); |
ca735b3a EL |
100 | } |
101 | ||
8ac2bde2 | 102 | unlock: |
9b73534d | 103 | mutex_unlock(&nf_log_mutex); |
8ac2bde2 | 104 | return ret; |
f6ebe77f | 105 | } |
ca735b3a | 106 | EXPORT_SYMBOL(nf_log_register); |
f6ebe77f | 107 | |
ca735b3a | 108 | void nf_log_unregister(struct nf_logger *logger) |
f6ebe77f | 109 | { |
205ee117 | 110 | const struct nf_logger *log; |
f6ebe77f HW |
111 | int i; |
112 | ||
9b73534d | 113 | mutex_lock(&nf_log_mutex); |
205ee117 FW |
114 | for (i = 0; i < NFPROTO_NUMPROTO; i++) { |
115 | log = nft_log_dereference(loggers[i][logger->type]); | |
116 | if (log == logger) | |
117 | RCU_INIT_POINTER(loggers[i][logger->type], NULL); | |
118 | } | |
9b73534d | 119 | mutex_unlock(&nf_log_mutex); |
ad5001cc | 120 | synchronize_rcu(); |
f6ebe77f | 121 | } |
e92ad99c | 122 | EXPORT_SYMBOL(nf_log_unregister); |
f6ebe77f | 123 | |
30e0c6a6 G |
124 | int nf_log_bind_pf(struct net *net, u_int8_t pf, |
125 | const struct nf_logger *logger) | |
ca735b3a | 126 | { |
30e0c6a6 | 127 | if (pf >= ARRAY_SIZE(net->nf.nf_loggers)) |
9ef0298a | 128 | return -EINVAL; |
ca735b3a EL |
129 | mutex_lock(&nf_log_mutex); |
130 | if (__find_logger(pf, logger->name) == NULL) { | |
131 | mutex_unlock(&nf_log_mutex); | |
132 | return -ENOENT; | |
133 | } | |
30e0c6a6 | 134 | rcu_assign_pointer(net->nf.nf_loggers[pf], logger); |
ca735b3a EL |
135 | mutex_unlock(&nf_log_mutex); |
136 | return 0; | |
137 | } | |
138 | EXPORT_SYMBOL(nf_log_bind_pf); | |
139 | ||
30e0c6a6 | 140 | void nf_log_unbind_pf(struct net *net, u_int8_t pf) |
ca735b3a | 141 | { |
30e0c6a6 | 142 | if (pf >= ARRAY_SIZE(net->nf.nf_loggers)) |
9ef0298a | 143 | return; |
ca735b3a | 144 | mutex_lock(&nf_log_mutex); |
30e0c6a6 | 145 | RCU_INIT_POINTER(net->nf.nf_loggers[pf], NULL); |
ca735b3a EL |
146 | mutex_unlock(&nf_log_mutex); |
147 | } | |
148 | EXPORT_SYMBOL(nf_log_unbind_pf); | |
149 | ||
960649d1 PNA |
150 | void nf_logger_request_module(int pf, enum nf_log_type type) |
151 | { | |
152 | if (loggers[pf][type] == NULL) | |
153 | request_module("nf-logger-%u-%u", pf, type); | |
154 | } | |
155 | EXPORT_SYMBOL_GPL(nf_logger_request_module); | |
156 | ||
fab4085f PNA |
157 | int nf_logger_find_get(int pf, enum nf_log_type type) |
158 | { | |
159 | struct nf_logger *logger; | |
160 | int ret = -ENOENT; | |
161 | ||
c5a589cc | 162 | if (rcu_access_pointer(loggers[pf][type]) == NULL) |
fab4085f PNA |
163 | request_module("nf-logger-%u-%u", pf, type); |
164 | ||
165 | rcu_read_lock(); | |
166 | logger = rcu_dereference(loggers[pf][type]); | |
167 | if (logger == NULL) | |
168 | goto out; | |
169 | ||
170 | if (logger && try_module_get(logger->me)) | |
171 | ret = 0; | |
172 | out: | |
173 | rcu_read_unlock(); | |
174 | return ret; | |
175 | } | |
176 | EXPORT_SYMBOL_GPL(nf_logger_find_get); | |
177 | ||
178 | void nf_logger_put(int pf, enum nf_log_type type) | |
179 | { | |
180 | struct nf_logger *logger; | |
181 | ||
182 | BUG_ON(loggers[pf][type] == NULL); | |
183 | ||
184 | rcu_read_lock(); | |
185 | logger = rcu_dereference(loggers[pf][type]); | |
186 | module_put(logger->me); | |
187 | rcu_read_unlock(); | |
188 | } | |
189 | EXPORT_SYMBOL_GPL(nf_logger_put); | |
190 | ||
30e0c6a6 G |
191 | void nf_log_packet(struct net *net, |
192 | u_int8_t pf, | |
f6ebe77f HW |
193 | unsigned int hooknum, |
194 | const struct sk_buff *skb, | |
195 | const struct net_device *in, | |
196 | const struct net_device *out, | |
7b2f9631 | 197 | const struct nf_loginfo *loginfo, |
f6ebe77f HW |
198 | const char *fmt, ...) |
199 | { | |
200 | va_list args; | |
201 | char prefix[NF_LOG_PREFIXLEN]; | |
7b2f9631 | 202 | const struct nf_logger *logger; |
601e68e1 | 203 | |
f6ebe77f | 204 | rcu_read_lock(); |
fab4085f PNA |
205 | if (loginfo != NULL) |
206 | logger = rcu_dereference(loggers[pf][loginfo->type]); | |
207 | else | |
208 | logger = rcu_dereference(net->nf.nf_loggers[pf]); | |
209 | ||
f6ebe77f HW |
210 | if (logger) { |
211 | va_start(args, fmt); | |
212 | vsnprintf(prefix, sizeof(prefix), fmt, args); | |
213 | va_end(args); | |
8cdb46da | 214 | logger->logfn(net, pf, hooknum, skb, in, out, loginfo, prefix); |
f6ebe77f HW |
215 | } |
216 | rcu_read_unlock(); | |
217 | } | |
218 | EXPORT_SYMBOL(nf_log_packet); | |
219 | ||
4017a7ee PNA |
220 | void nf_log_trace(struct net *net, |
221 | u_int8_t pf, | |
222 | unsigned int hooknum, | |
223 | const struct sk_buff *skb, | |
224 | const struct net_device *in, | |
225 | const struct net_device *out, | |
226 | const struct nf_loginfo *loginfo, const char *fmt, ...) | |
227 | { | |
228 | va_list args; | |
229 | char prefix[NF_LOG_PREFIXLEN]; | |
230 | const struct nf_logger *logger; | |
231 | ||
232 | rcu_read_lock(); | |
233 | logger = rcu_dereference(net->nf.nf_loggers[pf]); | |
234 | if (logger) { | |
235 | va_start(args, fmt); | |
236 | vsnprintf(prefix, sizeof(prefix), fmt, args); | |
237 | va_end(args); | |
238 | logger->logfn(net, pf, hooknum, skb, in, out, loginfo, prefix); | |
239 | } | |
240 | rcu_read_unlock(); | |
241 | } | |
242 | EXPORT_SYMBOL(nf_log_trace); | |
243 | ||
27fd8d90 PNA |
244 | #define S_SIZE (1024 - (sizeof(unsigned int) + 1)) |
245 | ||
246 | struct nf_log_buf { | |
247 | unsigned int count; | |
248 | char buf[S_SIZE + 1]; | |
249 | }; | |
250 | static struct nf_log_buf emergency, *emergency_ptr = &emergency; | |
251 | ||
252 | __printf(2, 3) int nf_log_buf_add(struct nf_log_buf *m, const char *f, ...) | |
253 | { | |
254 | va_list args; | |
255 | int len; | |
256 | ||
257 | if (likely(m->count < S_SIZE)) { | |
258 | va_start(args, f); | |
259 | len = vsnprintf(m->buf + m->count, S_SIZE - m->count, f, args); | |
260 | va_end(args); | |
261 | if (likely(m->count + len < S_SIZE)) { | |
262 | m->count += len; | |
263 | return 0; | |
264 | } | |
265 | } | |
266 | m->count = S_SIZE; | |
267 | printk_once(KERN_ERR KBUILD_MODNAME " please increase S_SIZE\n"); | |
268 | return -1; | |
269 | } | |
270 | EXPORT_SYMBOL_GPL(nf_log_buf_add); | |
271 | ||
272 | struct nf_log_buf *nf_log_buf_open(void) | |
273 | { | |
274 | struct nf_log_buf *m = kmalloc(sizeof(*m), GFP_ATOMIC); | |
275 | ||
276 | if (unlikely(!m)) { | |
277 | local_bh_disable(); | |
278 | do { | |
279 | m = xchg(&emergency_ptr, NULL); | |
280 | } while (!m); | |
281 | } | |
282 | m->count = 0; | |
283 | return m; | |
284 | } | |
285 | EXPORT_SYMBOL_GPL(nf_log_buf_open); | |
286 | ||
287 | void nf_log_buf_close(struct nf_log_buf *m) | |
288 | { | |
289 | m->buf[m->count] = 0; | |
290 | printk("%s\n", m->buf); | |
291 | ||
292 | if (likely(m != &emergency)) | |
293 | kfree(m); | |
294 | else { | |
295 | emergency_ptr = m; | |
296 | local_bh_enable(); | |
297 | } | |
298 | } | |
299 | EXPORT_SYMBOL_GPL(nf_log_buf_close); | |
300 | ||
f6ebe77f HW |
301 | #ifdef CONFIG_PROC_FS |
302 | static void *seq_start(struct seq_file *seq, loff_t *pos) | |
303 | { | |
30e0c6a6 G |
304 | struct net *net = seq_file_net(seq); |
305 | ||
6440fe05 | 306 | mutex_lock(&nf_log_mutex); |
f6ebe77f | 307 | |
30e0c6a6 | 308 | if (*pos >= ARRAY_SIZE(net->nf.nf_loggers)) |
f6ebe77f HW |
309 | return NULL; |
310 | ||
311 | return pos; | |
312 | } | |
313 | ||
314 | static void *seq_next(struct seq_file *s, void *v, loff_t *pos) | |
315 | { | |
30e0c6a6 G |
316 | struct net *net = seq_file_net(s); |
317 | ||
f6ebe77f HW |
318 | (*pos)++; |
319 | ||
30e0c6a6 | 320 | if (*pos >= ARRAY_SIZE(net->nf.nf_loggers)) |
f6ebe77f HW |
321 | return NULL; |
322 | ||
323 | return pos; | |
324 | } | |
325 | ||
326 | static void seq_stop(struct seq_file *s, void *v) | |
327 | { | |
6440fe05 | 328 | mutex_unlock(&nf_log_mutex); |
f6ebe77f HW |
329 | } |
330 | ||
331 | static int seq_show(struct seq_file *s, void *v) | |
332 | { | |
333 | loff_t *pos = v; | |
334 | const struct nf_logger *logger; | |
e71456ae | 335 | int i; |
30e0c6a6 | 336 | struct net *net = seq_file_net(s); |
f6ebe77f | 337 | |
0c26ed1c | 338 | logger = nft_log_dereference(net->nf.nf_loggers[*pos]); |
f6ebe77f HW |
339 | |
340 | if (!logger) | |
e71456ae | 341 | seq_printf(s, "%2lld NONE (", *pos); |
c7a913cd | 342 | else |
e71456ae | 343 | seq_printf(s, "%2lld %s (", *pos, logger->name); |
c7a913cd | 344 | |
e71456ae SRRH |
345 | if (seq_has_overflowed(s)) |
346 | return -ENOSPC; | |
c7a913cd | 347 | |
5962815a PNA |
348 | for (i = 0; i < NF_LOG_TYPE_MAX; i++) { |
349 | if (loggers[*pos][i] == NULL) | |
350 | continue; | |
351 | ||
0c26ed1c | 352 | logger = nft_log_dereference(loggers[*pos][i]); |
e71456ae SRRH |
353 | seq_printf(s, "%s", logger->name); |
354 | if (i == 0 && loggers[*pos][i + 1] != NULL) | |
355 | seq_printf(s, ","); | |
356 | ||
357 | if (seq_has_overflowed(s)) | |
358 | return -ENOSPC; | |
c7a913cd | 359 | } |
601e68e1 | 360 | |
e71456ae SRRH |
361 | seq_printf(s, ")\n"); |
362 | ||
363 | if (seq_has_overflowed(s)) | |
364 | return -ENOSPC; | |
365 | return 0; | |
f6ebe77f HW |
366 | } |
367 | ||
56b3d975 | 368 | static const struct seq_operations nflog_seq_ops = { |
f6ebe77f HW |
369 | .start = seq_start, |
370 | .next = seq_next, | |
371 | .stop = seq_stop, | |
372 | .show = seq_show, | |
373 | }; | |
374 | ||
375 | static int nflog_open(struct inode *inode, struct file *file) | |
376 | { | |
30e0c6a6 G |
377 | return seq_open_net(inode, file, &nflog_seq_ops, |
378 | sizeof(struct seq_net_private)); | |
f6ebe77f HW |
379 | } |
380 | ||
da7071d7 | 381 | static const struct file_operations nflog_file_ops = { |
f6ebe77f HW |
382 | .owner = THIS_MODULE, |
383 | .open = nflog_open, | |
384 | .read = seq_read, | |
385 | .llseek = seq_lseek, | |
30e0c6a6 | 386 | .release = seq_release_net, |
f6ebe77f HW |
387 | }; |
388 | ||
17625274 | 389 | |
f6ebe77f HW |
390 | #endif /* PROC_FS */ |
391 | ||
17625274 | 392 | #ifdef CONFIG_SYSCTL |
17625274 EL |
393 | static char nf_log_sysctl_fnames[NFPROTO_NUMPROTO-NFPROTO_UNSPEC][3]; |
394 | static struct ctl_table nf_log_sysctl_table[NFPROTO_NUMPROTO+1]; | |
f6ebe77f | 395 | |
fe2c6338 | 396 | static int nf_log_proc_dostring(struct ctl_table *table, int write, |
24955619 | 397 | void __user *buffer, size_t *lenp, loff_t *ppos) |
17625274 EL |
398 | { |
399 | const struct nf_logger *logger; | |
24955619 PM |
400 | char buf[NFLOGGER_NAME_LEN]; |
401 | size_t size = *lenp; | |
17625274 EL |
402 | int r = 0; |
403 | int tindex = (unsigned long)table->extra1; | |
21cc1a18 | 404 | struct net *net = table->extra2; |
17625274 EL |
405 | |
406 | if (write) { | |
24955619 PM |
407 | if (size > sizeof(buf)) |
408 | size = sizeof(buf); | |
409 | if (copy_from_user(buf, buffer, size)) | |
410 | return -EFAULT; | |
411 | ||
412 | if (!strcmp(buf, "NONE")) { | |
30e0c6a6 | 413 | nf_log_unbind_pf(net, tindex); |
17625274 EL |
414 | return 0; |
415 | } | |
416 | mutex_lock(&nf_log_mutex); | |
24955619 | 417 | logger = __find_logger(tindex, buf); |
17625274 EL |
418 | if (logger == NULL) { |
419 | mutex_unlock(&nf_log_mutex); | |
420 | return -ENOENT; | |
421 | } | |
30e0c6a6 | 422 | rcu_assign_pointer(net->nf.nf_loggers[tindex], logger); |
17625274 EL |
423 | mutex_unlock(&nf_log_mutex); |
424 | } else { | |
266d07cb | 425 | mutex_lock(&nf_log_mutex); |
0c26ed1c | 426 | logger = nft_log_dereference(net->nf.nf_loggers[tindex]); |
17625274 EL |
427 | if (!logger) |
428 | table->data = "NONE"; | |
429 | else | |
430 | table->data = logger->name; | |
8d65af78 | 431 | r = proc_dostring(table, write, buffer, lenp, ppos); |
266d07cb | 432 | mutex_unlock(&nf_log_mutex); |
17625274 EL |
433 | } |
434 | ||
435 | return r; | |
436 | } | |
437 | ||
30e0c6a6 | 438 | static int netfilter_log_sysctl_init(struct net *net) |
f6ebe77f | 439 | { |
ca735b3a | 440 | int i; |
30e0c6a6 G |
441 | struct ctl_table *table; |
442 | ||
443 | table = nf_log_sysctl_table; | |
444 | if (!net_eq(net, &init_net)) { | |
445 | table = kmemdup(nf_log_sysctl_table, | |
446 | sizeof(nf_log_sysctl_table), | |
447 | GFP_KERNEL); | |
448 | if (!table) | |
449 | goto err_alloc; | |
450 | } else { | |
451 | for (i = NFPROTO_UNSPEC; i < NFPROTO_NUMPROTO; i++) { | |
452 | snprintf(nf_log_sysctl_fnames[i], | |
453 | 3, "%d", i); | |
454 | nf_log_sysctl_table[i].procname = | |
455 | nf_log_sysctl_fnames[i]; | |
8aefc4d1 | 456 | nf_log_sysctl_table[i].maxlen = NFLOGGER_NAME_LEN; |
30e0c6a6 G |
457 | nf_log_sysctl_table[i].mode = 0644; |
458 | nf_log_sysctl_table[i].proc_handler = | |
459 | nf_log_proc_dostring; | |
460 | nf_log_sysctl_table[i].extra1 = | |
461 | (void *)(unsigned long) i; | |
462 | } | |
17625274 EL |
463 | } |
464 | ||
21cc1a18 JH |
465 | for (i = NFPROTO_UNSPEC; i < NFPROTO_NUMPROTO; i++) |
466 | table[i].extra2 = net; | |
467 | ||
30e0c6a6 G |
468 | net->nf.nf_log_dir_header = register_net_sysctl(net, |
469 | "net/netfilter/nf_log", | |
470 | table); | |
471 | if (!net->nf.nf_log_dir_header) | |
472 | goto err_reg; | |
17625274 EL |
473 | |
474 | return 0; | |
30e0c6a6 G |
475 | |
476 | err_reg: | |
477 | if (!net_eq(net, &init_net)) | |
478 | kfree(table); | |
479 | err_alloc: | |
480 | return -ENOMEM; | |
481 | } | |
482 | ||
483 | static void netfilter_log_sysctl_exit(struct net *net) | |
484 | { | |
485 | struct ctl_table *table; | |
486 | ||
487 | table = net->nf.nf_log_dir_header->ctl_table_arg; | |
488 | unregister_net_sysctl_table(net->nf.nf_log_dir_header); | |
489 | if (!net_eq(net, &init_net)) | |
490 | kfree(table); | |
17625274 EL |
491 | } |
492 | #else | |
30e0c6a6 | 493 | static int netfilter_log_sysctl_init(struct net *net) |
17625274 EL |
494 | { |
495 | return 0; | |
496 | } | |
30e0c6a6 G |
497 | |
498 | static void netfilter_log_sysctl_exit(struct net *net) | |
499 | { | |
500 | } | |
17625274 EL |
501 | #endif /* CONFIG_SYSCTL */ |
502 | ||
30e0c6a6 | 503 | static int __net_init nf_log_net_init(struct net *net) |
17625274 | 504 | { |
30e0c6a6 G |
505 | int ret = -ENOMEM; |
506 | ||
f6ebe77f | 507 | #ifdef CONFIG_PROC_FS |
8eeee8b1 | 508 | if (!proc_create("nf_log", S_IRUGO, |
30e0c6a6 G |
509 | net->nf.proc_netfilter, &nflog_file_ops)) |
510 | return ret; | |
62243927 | 511 | #endif |
30e0c6a6 G |
512 | ret = netfilter_log_sysctl_init(net); |
513 | if (ret < 0) | |
514 | goto out_sysctl; | |
ca735b3a | 515 | |
30e0c6a6 G |
516 | return 0; |
517 | ||
518 | out_sysctl: | |
e778f56e | 519 | #ifdef CONFIG_PROC_FS |
6d11cfdb | 520 | remove_proc_entry("nf_log", net->nf.proc_netfilter); |
e778f56e | 521 | #endif |
30e0c6a6 G |
522 | return ret; |
523 | } | |
524 | ||
525 | static void __net_exit nf_log_net_exit(struct net *net) | |
526 | { | |
527 | netfilter_log_sysctl_exit(net); | |
e778f56e | 528 | #ifdef CONFIG_PROC_FS |
30e0c6a6 | 529 | remove_proc_entry("nf_log", net->nf.proc_netfilter); |
e778f56e | 530 | #endif |
30e0c6a6 G |
531 | } |
532 | ||
533 | static struct pernet_operations nf_log_net_ops = { | |
534 | .init = nf_log_net_init, | |
535 | .exit = nf_log_net_exit, | |
536 | }; | |
537 | ||
538 | int __init netfilter_log_init(void) | |
539 | { | |
5962815a | 540 | return register_pernet_subsys(&nf_log_net_ops); |
f6ebe77f | 541 | } |