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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 | |
779994fa | 42 | int nf_log_set(struct net *net, u_int8_t pf, const struct nf_logger *logger) |
30e0c6a6 G |
43 | { |
44 | const struct nf_logger *log; | |
45 | ||
779994fa GF |
46 | if (pf == NFPROTO_UNSPEC || pf >= ARRAY_SIZE(net->nf.nf_loggers)) |
47 | return -EOPNOTSUPP; | |
30e0c6a6 G |
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); | |
779994fa GF |
55 | |
56 | return 0; | |
30e0c6a6 G |
57 | } |
58 | EXPORT_SYMBOL(nf_log_set); | |
59 | ||
60 | void nf_log_unset(struct net *net, const struct nf_logger *logger) | |
61 | { | |
62 | int i; | |
63 | const struct nf_logger *log; | |
64 | ||
30e0c6a6 G |
65 | mutex_lock(&nf_log_mutex); |
66 | for (i = 0; i < NFPROTO_NUMPROTO; i++) { | |
0c26ed1c | 67 | log = nft_log_dereference(net->nf.nf_loggers[i]); |
30e0c6a6 G |
68 | if (log == logger) |
69 | RCU_INIT_POINTER(net->nf.nf_loggers[i], NULL); | |
70 | } | |
71 | mutex_unlock(&nf_log_mutex); | |
72 | synchronize_rcu(); | |
73 | } | |
74 | EXPORT_SYMBOL(nf_log_unset); | |
75 | ||
d93cf068 | 76 | /* return EEXIST if the same logger is registered, 0 on success. */ |
ca735b3a | 77 | int nf_log_register(u_int8_t pf, struct nf_logger *logger) |
f6ebe77f | 78 | { |
b6f0a365 | 79 | int i; |
8ac2bde2 | 80 | int ret = 0; |
ca735b3a | 81 | |
30e0c6a6 | 82 | if (pf >= ARRAY_SIZE(init_net.nf.nf_loggers)) |
ca735b3a EL |
83 | return -EINVAL; |
84 | ||
9b73534d | 85 | mutex_lock(&nf_log_mutex); |
ca735b3a EL |
86 | |
87 | if (pf == NFPROTO_UNSPEC) { | |
8ac2bde2 ML |
88 | for (i = NFPROTO_UNSPEC; i < NFPROTO_NUMPROTO; i++) { |
89 | if (rcu_access_pointer(loggers[i][logger->type])) { | |
90 | ret = -EEXIST; | |
91 | goto unlock; | |
92 | } | |
93 | } | |
ca735b3a | 94 | for (i = NFPROTO_UNSPEC; i < NFPROTO_NUMPROTO; i++) |
5962815a | 95 | rcu_assign_pointer(loggers[i][logger->type], logger); |
ca735b3a | 96 | } else { |
8ac2bde2 ML |
97 | if (rcu_access_pointer(loggers[pf][logger->type])) { |
98 | ret = -EEXIST; | |
99 | goto unlock; | |
100 | } | |
5962815a | 101 | rcu_assign_pointer(loggers[pf][logger->type], logger); |
ca735b3a EL |
102 | } |
103 | ||
8ac2bde2 | 104 | unlock: |
9b73534d | 105 | mutex_unlock(&nf_log_mutex); |
8ac2bde2 | 106 | return ret; |
f6ebe77f | 107 | } |
ca735b3a | 108 | EXPORT_SYMBOL(nf_log_register); |
f6ebe77f | 109 | |
ca735b3a | 110 | void nf_log_unregister(struct nf_logger *logger) |
f6ebe77f | 111 | { |
205ee117 | 112 | const struct nf_logger *log; |
f6ebe77f HW |
113 | int i; |
114 | ||
9b73534d | 115 | mutex_lock(&nf_log_mutex); |
205ee117 FW |
116 | for (i = 0; i < NFPROTO_NUMPROTO; i++) { |
117 | log = nft_log_dereference(loggers[i][logger->type]); | |
118 | if (log == logger) | |
119 | RCU_INIT_POINTER(loggers[i][logger->type], NULL); | |
120 | } | |
9b73534d | 121 | mutex_unlock(&nf_log_mutex); |
ad5001cc | 122 | synchronize_rcu(); |
f6ebe77f | 123 | } |
e92ad99c | 124 | EXPORT_SYMBOL(nf_log_unregister); |
f6ebe77f | 125 | |
30e0c6a6 G |
126 | int nf_log_bind_pf(struct net *net, u_int8_t pf, |
127 | const struct nf_logger *logger) | |
ca735b3a | 128 | { |
30e0c6a6 | 129 | if (pf >= ARRAY_SIZE(net->nf.nf_loggers)) |
9ef0298a | 130 | return -EINVAL; |
ca735b3a EL |
131 | mutex_lock(&nf_log_mutex); |
132 | if (__find_logger(pf, logger->name) == NULL) { | |
133 | mutex_unlock(&nf_log_mutex); | |
134 | return -ENOENT; | |
135 | } | |
30e0c6a6 | 136 | rcu_assign_pointer(net->nf.nf_loggers[pf], logger); |
ca735b3a EL |
137 | mutex_unlock(&nf_log_mutex); |
138 | return 0; | |
139 | } | |
140 | EXPORT_SYMBOL(nf_log_bind_pf); | |
141 | ||
30e0c6a6 | 142 | void nf_log_unbind_pf(struct net *net, u_int8_t pf) |
ca735b3a | 143 | { |
30e0c6a6 | 144 | if (pf >= ARRAY_SIZE(net->nf.nf_loggers)) |
9ef0298a | 145 | return; |
ca735b3a | 146 | mutex_lock(&nf_log_mutex); |
30e0c6a6 | 147 | RCU_INIT_POINTER(net->nf.nf_loggers[pf], NULL); |
ca735b3a EL |
148 | mutex_unlock(&nf_log_mutex); |
149 | } | |
150 | EXPORT_SYMBOL(nf_log_unbind_pf); | |
151 | ||
960649d1 PNA |
152 | void nf_logger_request_module(int pf, enum nf_log_type type) |
153 | { | |
154 | if (loggers[pf][type] == NULL) | |
155 | request_module("nf-logger-%u-%u", pf, type); | |
156 | } | |
157 | EXPORT_SYMBOL_GPL(nf_logger_request_module); | |
158 | ||
fab4085f PNA |
159 | int nf_logger_find_get(int pf, enum nf_log_type type) |
160 | { | |
161 | struct nf_logger *logger; | |
162 | int ret = -ENOENT; | |
163 | ||
f3bb5333 LZ |
164 | if (pf == NFPROTO_INET) { |
165 | ret = nf_logger_find_get(NFPROTO_IPV4, type); | |
166 | if (ret < 0) | |
167 | return ret; | |
168 | ||
169 | ret = nf_logger_find_get(NFPROTO_IPV6, type); | |
170 | if (ret < 0) { | |
171 | nf_logger_put(NFPROTO_IPV4, type); | |
172 | return ret; | |
173 | } | |
174 | ||
175 | return 0; | |
176 | } | |
177 | ||
c5a589cc | 178 | if (rcu_access_pointer(loggers[pf][type]) == NULL) |
fab4085f PNA |
179 | request_module("nf-logger-%u-%u", pf, type); |
180 | ||
181 | rcu_read_lock(); | |
182 | logger = rcu_dereference(loggers[pf][type]); | |
183 | if (logger == NULL) | |
184 | goto out; | |
185 | ||
7e53e7f8 | 186 | if (try_module_get(logger->me)) |
fab4085f PNA |
187 | ret = 0; |
188 | out: | |
189 | rcu_read_unlock(); | |
190 | return ret; | |
191 | } | |
192 | EXPORT_SYMBOL_GPL(nf_logger_find_get); | |
193 | ||
194 | void nf_logger_put(int pf, enum nf_log_type type) | |
195 | { | |
196 | struct nf_logger *logger; | |
197 | ||
f3bb5333 LZ |
198 | if (pf == NFPROTO_INET) { |
199 | nf_logger_put(NFPROTO_IPV4, type); | |
200 | nf_logger_put(NFPROTO_IPV6, type); | |
201 | return; | |
202 | } | |
203 | ||
fab4085f PNA |
204 | BUG_ON(loggers[pf][type] == NULL); |
205 | ||
206 | rcu_read_lock(); | |
207 | logger = rcu_dereference(loggers[pf][type]); | |
208 | module_put(logger->me); | |
209 | rcu_read_unlock(); | |
210 | } | |
211 | EXPORT_SYMBOL_GPL(nf_logger_put); | |
212 | ||
30e0c6a6 G |
213 | void nf_log_packet(struct net *net, |
214 | u_int8_t pf, | |
f6ebe77f HW |
215 | unsigned int hooknum, |
216 | const struct sk_buff *skb, | |
217 | const struct net_device *in, | |
218 | const struct net_device *out, | |
7b2f9631 | 219 | const struct nf_loginfo *loginfo, |
f6ebe77f HW |
220 | const char *fmt, ...) |
221 | { | |
222 | va_list args; | |
223 | char prefix[NF_LOG_PREFIXLEN]; | |
7b2f9631 | 224 | const struct nf_logger *logger; |
601e68e1 | 225 | |
f6ebe77f | 226 | rcu_read_lock(); |
fab4085f PNA |
227 | if (loginfo != NULL) |
228 | logger = rcu_dereference(loggers[pf][loginfo->type]); | |
229 | else | |
230 | logger = rcu_dereference(net->nf.nf_loggers[pf]); | |
231 | ||
f6ebe77f HW |
232 | if (logger) { |
233 | va_start(args, fmt); | |
234 | vsnprintf(prefix, sizeof(prefix), fmt, args); | |
235 | va_end(args); | |
8cdb46da | 236 | logger->logfn(net, pf, hooknum, skb, in, out, loginfo, prefix); |
f6ebe77f HW |
237 | } |
238 | rcu_read_unlock(); | |
239 | } | |
240 | EXPORT_SYMBOL(nf_log_packet); | |
241 | ||
4017a7ee PNA |
242 | void nf_log_trace(struct net *net, |
243 | u_int8_t pf, | |
244 | unsigned int hooknum, | |
245 | const struct sk_buff *skb, | |
246 | const struct net_device *in, | |
247 | const struct net_device *out, | |
248 | const struct nf_loginfo *loginfo, const char *fmt, ...) | |
249 | { | |
250 | va_list args; | |
251 | char prefix[NF_LOG_PREFIXLEN]; | |
252 | const struct nf_logger *logger; | |
253 | ||
254 | rcu_read_lock(); | |
255 | logger = rcu_dereference(net->nf.nf_loggers[pf]); | |
256 | if (logger) { | |
257 | va_start(args, fmt); | |
258 | vsnprintf(prefix, sizeof(prefix), fmt, args); | |
259 | va_end(args); | |
260 | logger->logfn(net, pf, hooknum, skb, in, out, loginfo, prefix); | |
261 | } | |
262 | rcu_read_unlock(); | |
263 | } | |
264 | EXPORT_SYMBOL(nf_log_trace); | |
265 | ||
27fd8d90 PNA |
266 | #define S_SIZE (1024 - (sizeof(unsigned int) + 1)) |
267 | ||
268 | struct nf_log_buf { | |
269 | unsigned int count; | |
270 | char buf[S_SIZE + 1]; | |
271 | }; | |
272 | static struct nf_log_buf emergency, *emergency_ptr = &emergency; | |
273 | ||
274 | __printf(2, 3) int nf_log_buf_add(struct nf_log_buf *m, const char *f, ...) | |
275 | { | |
276 | va_list args; | |
277 | int len; | |
278 | ||
279 | if (likely(m->count < S_SIZE)) { | |
280 | va_start(args, f); | |
281 | len = vsnprintf(m->buf + m->count, S_SIZE - m->count, f, args); | |
282 | va_end(args); | |
283 | if (likely(m->count + len < S_SIZE)) { | |
284 | m->count += len; | |
285 | return 0; | |
286 | } | |
287 | } | |
288 | m->count = S_SIZE; | |
289 | printk_once(KERN_ERR KBUILD_MODNAME " please increase S_SIZE\n"); | |
290 | return -1; | |
291 | } | |
292 | EXPORT_SYMBOL_GPL(nf_log_buf_add); | |
293 | ||
294 | struct nf_log_buf *nf_log_buf_open(void) | |
295 | { | |
296 | struct nf_log_buf *m = kmalloc(sizeof(*m), GFP_ATOMIC); | |
297 | ||
298 | if (unlikely(!m)) { | |
299 | local_bh_disable(); | |
300 | do { | |
301 | m = xchg(&emergency_ptr, NULL); | |
302 | } while (!m); | |
303 | } | |
304 | m->count = 0; | |
305 | return m; | |
306 | } | |
307 | EXPORT_SYMBOL_GPL(nf_log_buf_open); | |
308 | ||
309 | void nf_log_buf_close(struct nf_log_buf *m) | |
310 | { | |
311 | m->buf[m->count] = 0; | |
312 | printk("%s\n", m->buf); | |
313 | ||
314 | if (likely(m != &emergency)) | |
315 | kfree(m); | |
316 | else { | |
317 | emergency_ptr = m; | |
318 | local_bh_enable(); | |
319 | } | |
320 | } | |
321 | EXPORT_SYMBOL_GPL(nf_log_buf_close); | |
322 | ||
f6ebe77f HW |
323 | #ifdef CONFIG_PROC_FS |
324 | static void *seq_start(struct seq_file *seq, loff_t *pos) | |
325 | { | |
30e0c6a6 G |
326 | struct net *net = seq_file_net(seq); |
327 | ||
6440fe05 | 328 | mutex_lock(&nf_log_mutex); |
f6ebe77f | 329 | |
30e0c6a6 | 330 | if (*pos >= ARRAY_SIZE(net->nf.nf_loggers)) |
f6ebe77f HW |
331 | return NULL; |
332 | ||
333 | return pos; | |
334 | } | |
335 | ||
336 | static void *seq_next(struct seq_file *s, void *v, loff_t *pos) | |
337 | { | |
30e0c6a6 G |
338 | struct net *net = seq_file_net(s); |
339 | ||
f6ebe77f HW |
340 | (*pos)++; |
341 | ||
30e0c6a6 | 342 | if (*pos >= ARRAY_SIZE(net->nf.nf_loggers)) |
f6ebe77f HW |
343 | return NULL; |
344 | ||
345 | return pos; | |
346 | } | |
347 | ||
348 | static void seq_stop(struct seq_file *s, void *v) | |
349 | { | |
6440fe05 | 350 | mutex_unlock(&nf_log_mutex); |
f6ebe77f HW |
351 | } |
352 | ||
353 | static int seq_show(struct seq_file *s, void *v) | |
354 | { | |
355 | loff_t *pos = v; | |
356 | const struct nf_logger *logger; | |
e71456ae | 357 | int i; |
30e0c6a6 | 358 | struct net *net = seq_file_net(s); |
f6ebe77f | 359 | |
0c26ed1c | 360 | logger = nft_log_dereference(net->nf.nf_loggers[*pos]); |
f6ebe77f HW |
361 | |
362 | if (!logger) | |
e71456ae | 363 | seq_printf(s, "%2lld NONE (", *pos); |
c7a913cd | 364 | else |
e71456ae | 365 | seq_printf(s, "%2lld %s (", *pos, logger->name); |
c7a913cd | 366 | |
e71456ae SRRH |
367 | if (seq_has_overflowed(s)) |
368 | return -ENOSPC; | |
c7a913cd | 369 | |
5962815a PNA |
370 | for (i = 0; i < NF_LOG_TYPE_MAX; i++) { |
371 | if (loggers[*pos][i] == NULL) | |
372 | continue; | |
373 | ||
0c26ed1c | 374 | logger = nft_log_dereference(loggers[*pos][i]); |
e71456ae SRRH |
375 | seq_printf(s, "%s", logger->name); |
376 | if (i == 0 && loggers[*pos][i + 1] != NULL) | |
377 | seq_printf(s, ","); | |
378 | ||
379 | if (seq_has_overflowed(s)) | |
380 | return -ENOSPC; | |
c7a913cd | 381 | } |
601e68e1 | 382 | |
e71456ae SRRH |
383 | seq_printf(s, ")\n"); |
384 | ||
385 | if (seq_has_overflowed(s)) | |
386 | return -ENOSPC; | |
387 | return 0; | |
f6ebe77f HW |
388 | } |
389 | ||
56b3d975 | 390 | static const struct seq_operations nflog_seq_ops = { |
f6ebe77f HW |
391 | .start = seq_start, |
392 | .next = seq_next, | |
393 | .stop = seq_stop, | |
394 | .show = seq_show, | |
395 | }; | |
396 | ||
397 | static int nflog_open(struct inode *inode, struct file *file) | |
398 | { | |
30e0c6a6 G |
399 | return seq_open_net(inode, file, &nflog_seq_ops, |
400 | sizeof(struct seq_net_private)); | |
f6ebe77f HW |
401 | } |
402 | ||
da7071d7 | 403 | static const struct file_operations nflog_file_ops = { |
f6ebe77f HW |
404 | .owner = THIS_MODULE, |
405 | .open = nflog_open, | |
406 | .read = seq_read, | |
407 | .llseek = seq_lseek, | |
30e0c6a6 | 408 | .release = seq_release_net, |
f6ebe77f HW |
409 | }; |
410 | ||
17625274 | 411 | |
f6ebe77f HW |
412 | #endif /* PROC_FS */ |
413 | ||
17625274 | 414 | #ifdef CONFIG_SYSCTL |
17625274 EL |
415 | static char nf_log_sysctl_fnames[NFPROTO_NUMPROTO-NFPROTO_UNSPEC][3]; |
416 | static struct ctl_table nf_log_sysctl_table[NFPROTO_NUMPROTO+1]; | |
f6ebe77f | 417 | |
fe2c6338 | 418 | static int nf_log_proc_dostring(struct ctl_table *table, int write, |
24955619 | 419 | void __user *buffer, size_t *lenp, loff_t *ppos) |
17625274 EL |
420 | { |
421 | const struct nf_logger *logger; | |
24955619 | 422 | char buf[NFLOGGER_NAME_LEN]; |
17625274 EL |
423 | int r = 0; |
424 | int tindex = (unsigned long)table->extra1; | |
dbb5918c | 425 | struct net *net = table->extra2; |
17625274 EL |
426 | |
427 | if (write) { | |
c6ac37d8 PT |
428 | struct ctl_table tmp = *table; |
429 | ||
430 | tmp.data = buf; | |
431 | r = proc_dostring(&tmp, write, buffer, lenp, ppos); | |
432 | if (r) | |
433 | return r; | |
24955619 PM |
434 | |
435 | if (!strcmp(buf, "NONE")) { | |
30e0c6a6 | 436 | nf_log_unbind_pf(net, tindex); |
17625274 EL |
437 | return 0; |
438 | } | |
439 | mutex_lock(&nf_log_mutex); | |
24955619 | 440 | logger = __find_logger(tindex, buf); |
17625274 EL |
441 | if (logger == NULL) { |
442 | mutex_unlock(&nf_log_mutex); | |
443 | return -ENOENT; | |
444 | } | |
30e0c6a6 | 445 | rcu_assign_pointer(net->nf.nf_loggers[tindex], logger); |
17625274 EL |
446 | mutex_unlock(&nf_log_mutex); |
447 | } else { | |
266d07cb | 448 | mutex_lock(&nf_log_mutex); |
0c26ed1c | 449 | logger = nft_log_dereference(net->nf.nf_loggers[tindex]); |
17625274 EL |
450 | if (!logger) |
451 | table->data = "NONE"; | |
452 | else | |
453 | table->data = logger->name; | |
8d65af78 | 454 | r = proc_dostring(table, write, buffer, lenp, ppos); |
266d07cb | 455 | mutex_unlock(&nf_log_mutex); |
17625274 EL |
456 | } |
457 | ||
458 | return r; | |
459 | } | |
460 | ||
30e0c6a6 | 461 | static int netfilter_log_sysctl_init(struct net *net) |
f6ebe77f | 462 | { |
ca735b3a | 463 | int i; |
30e0c6a6 G |
464 | struct ctl_table *table; |
465 | ||
466 | table = nf_log_sysctl_table; | |
467 | if (!net_eq(net, &init_net)) { | |
468 | table = kmemdup(nf_log_sysctl_table, | |
469 | sizeof(nf_log_sysctl_table), | |
470 | GFP_KERNEL); | |
471 | if (!table) | |
472 | goto err_alloc; | |
473 | } else { | |
474 | for (i = NFPROTO_UNSPEC; i < NFPROTO_NUMPROTO; i++) { | |
475 | snprintf(nf_log_sysctl_fnames[i], | |
476 | 3, "%d", i); | |
477 | nf_log_sysctl_table[i].procname = | |
478 | nf_log_sysctl_fnames[i]; | |
8aefc4d1 | 479 | nf_log_sysctl_table[i].maxlen = NFLOGGER_NAME_LEN; |
30e0c6a6 G |
480 | nf_log_sysctl_table[i].mode = 0644; |
481 | nf_log_sysctl_table[i].proc_handler = | |
482 | nf_log_proc_dostring; | |
483 | nf_log_sysctl_table[i].extra1 = | |
484 | (void *)(unsigned long) i; | |
485 | } | |
17625274 EL |
486 | } |
487 | ||
dbb5918c JH |
488 | for (i = NFPROTO_UNSPEC; i < NFPROTO_NUMPROTO; i++) |
489 | table[i].extra2 = net; | |
490 | ||
30e0c6a6 G |
491 | net->nf.nf_log_dir_header = register_net_sysctl(net, |
492 | "net/netfilter/nf_log", | |
493 | table); | |
494 | if (!net->nf.nf_log_dir_header) | |
495 | goto err_reg; | |
17625274 EL |
496 | |
497 | return 0; | |
30e0c6a6 G |
498 | |
499 | err_reg: | |
500 | if (!net_eq(net, &init_net)) | |
501 | kfree(table); | |
502 | err_alloc: | |
503 | return -ENOMEM; | |
504 | } | |
505 | ||
506 | static void netfilter_log_sysctl_exit(struct net *net) | |
507 | { | |
508 | struct ctl_table *table; | |
509 | ||
510 | table = net->nf.nf_log_dir_header->ctl_table_arg; | |
511 | unregister_net_sysctl_table(net->nf.nf_log_dir_header); | |
512 | if (!net_eq(net, &init_net)) | |
513 | kfree(table); | |
17625274 EL |
514 | } |
515 | #else | |
30e0c6a6 | 516 | static int netfilter_log_sysctl_init(struct net *net) |
17625274 EL |
517 | { |
518 | return 0; | |
519 | } | |
30e0c6a6 G |
520 | |
521 | static void netfilter_log_sysctl_exit(struct net *net) | |
522 | { | |
523 | } | |
17625274 EL |
524 | #endif /* CONFIG_SYSCTL */ |
525 | ||
30e0c6a6 | 526 | static int __net_init nf_log_net_init(struct net *net) |
17625274 | 527 | { |
30e0c6a6 G |
528 | int ret = -ENOMEM; |
529 | ||
f6ebe77f | 530 | #ifdef CONFIG_PROC_FS |
8eeee8b1 | 531 | if (!proc_create("nf_log", S_IRUGO, |
30e0c6a6 G |
532 | net->nf.proc_netfilter, &nflog_file_ops)) |
533 | return ret; | |
62243927 | 534 | #endif |
30e0c6a6 G |
535 | ret = netfilter_log_sysctl_init(net); |
536 | if (ret < 0) | |
537 | goto out_sysctl; | |
ca735b3a | 538 | |
30e0c6a6 G |
539 | return 0; |
540 | ||
541 | out_sysctl: | |
e778f56e | 542 | #ifdef CONFIG_PROC_FS |
6d11cfdb | 543 | remove_proc_entry("nf_log", net->nf.proc_netfilter); |
e778f56e | 544 | #endif |
30e0c6a6 G |
545 | return ret; |
546 | } | |
547 | ||
548 | static void __net_exit nf_log_net_exit(struct net *net) | |
549 | { | |
550 | netfilter_log_sysctl_exit(net); | |
e778f56e | 551 | #ifdef CONFIG_PROC_FS |
30e0c6a6 | 552 | remove_proc_entry("nf_log", net->nf.proc_netfilter); |
e778f56e | 553 | #endif |
30e0c6a6 G |
554 | } |
555 | ||
556 | static struct pernet_operations nf_log_net_ops = { | |
557 | .init = nf_log_net_init, | |
558 | .exit = nf_log_net_exit, | |
559 | }; | |
560 | ||
561 | int __init netfilter_log_init(void) | |
562 | { | |
5962815a | 563 | return register_pernet_subsys(&nf_log_net_ops); |
f6ebe77f | 564 | } |