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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 | ||
17625274 | 16 | #define NFLOGGER_NAME_LEN 64 |
f6ebe77f | 17 | |
5962815a | 18 | static struct nf_logger __rcu *loggers[NFPROTO_NUMPROTO][NF_LOG_TYPE_MAX] __read_mostly; |
9b73534d | 19 | static DEFINE_MUTEX(nf_log_mutex); |
f6ebe77f | 20 | |
0c26ed1c ML |
21 | #define nft_log_dereference(logger) \ |
22 | rcu_dereference_protected(logger, lockdep_is_held(&nf_log_mutex)) | |
23 | ||
ca735b3a | 24 | static struct nf_logger *__find_logger(int pf, const char *str_logger) |
f6ebe77f | 25 | { |
5962815a PNA |
26 | struct nf_logger *log; |
27 | int i; | |
28 | ||
29 | for (i = 0; i < NF_LOG_TYPE_MAX; i++) { | |
30 | if (loggers[pf][i] == NULL) | |
31 | continue; | |
f6ebe77f | 32 | |
0c26ed1c | 33 | log = nft_log_dereference(loggers[pf][i]); |
18082746 | 34 | if (!strncasecmp(str_logger, log->name, strlen(log->name))) |
5962815a | 35 | return log; |
ca735b3a | 36 | } |
d72367b6 | 37 | |
ca735b3a | 38 | return NULL; |
601e68e1 | 39 | } |
f6ebe77f | 40 | |
779994fa | 41 | int nf_log_set(struct net *net, u_int8_t pf, const struct nf_logger *logger) |
30e0c6a6 G |
42 | { |
43 | const struct nf_logger *log; | |
44 | ||
779994fa GF |
45 | if (pf == NFPROTO_UNSPEC || pf >= ARRAY_SIZE(net->nf.nf_loggers)) |
46 | return -EOPNOTSUPP; | |
30e0c6a6 G |
47 | |
48 | mutex_lock(&nf_log_mutex); | |
0c26ed1c | 49 | log = nft_log_dereference(net->nf.nf_loggers[pf]); |
30e0c6a6 G |
50 | if (log == NULL) |
51 | rcu_assign_pointer(net->nf.nf_loggers[pf], logger); | |
52 | ||
53 | mutex_unlock(&nf_log_mutex); | |
779994fa GF |
54 | |
55 | return 0; | |
30e0c6a6 G |
56 | } |
57 | EXPORT_SYMBOL(nf_log_set); | |
58 | ||
59 | void nf_log_unset(struct net *net, const struct nf_logger *logger) | |
60 | { | |
61 | int i; | |
62 | const struct nf_logger *log; | |
63 | ||
30e0c6a6 G |
64 | mutex_lock(&nf_log_mutex); |
65 | for (i = 0; i < NFPROTO_NUMPROTO; i++) { | |
0c26ed1c | 66 | log = nft_log_dereference(net->nf.nf_loggers[i]); |
30e0c6a6 G |
67 | if (log == logger) |
68 | RCU_INIT_POINTER(net->nf.nf_loggers[i], NULL); | |
69 | } | |
70 | mutex_unlock(&nf_log_mutex); | |
71 | synchronize_rcu(); | |
72 | } | |
73 | EXPORT_SYMBOL(nf_log_unset); | |
74 | ||
d93cf068 | 75 | /* return EEXIST if the same logger is registered, 0 on success. */ |
ca735b3a | 76 | int nf_log_register(u_int8_t pf, struct nf_logger *logger) |
f6ebe77f | 77 | { |
b6f0a365 | 78 | int i; |
8ac2bde2 | 79 | int ret = 0; |
ca735b3a | 80 | |
30e0c6a6 | 81 | if (pf >= ARRAY_SIZE(init_net.nf.nf_loggers)) |
ca735b3a EL |
82 | return -EINVAL; |
83 | ||
9b73534d | 84 | mutex_lock(&nf_log_mutex); |
ca735b3a EL |
85 | |
86 | if (pf == NFPROTO_UNSPEC) { | |
8ac2bde2 ML |
87 | for (i = NFPROTO_UNSPEC; i < NFPROTO_NUMPROTO; i++) { |
88 | if (rcu_access_pointer(loggers[i][logger->type])) { | |
89 | ret = -EEXIST; | |
90 | goto unlock; | |
91 | } | |
92 | } | |
ca735b3a | 93 | for (i = NFPROTO_UNSPEC; i < NFPROTO_NUMPROTO; i++) |
5962815a | 94 | rcu_assign_pointer(loggers[i][logger->type], logger); |
ca735b3a | 95 | } else { |
8ac2bde2 ML |
96 | if (rcu_access_pointer(loggers[pf][logger->type])) { |
97 | ret = -EEXIST; | |
98 | goto unlock; | |
99 | } | |
5962815a | 100 | rcu_assign_pointer(loggers[pf][logger->type], logger); |
ca735b3a EL |
101 | } |
102 | ||
8ac2bde2 | 103 | unlock: |
9b73534d | 104 | mutex_unlock(&nf_log_mutex); |
8ac2bde2 | 105 | return ret; |
f6ebe77f | 106 | } |
ca735b3a | 107 | EXPORT_SYMBOL(nf_log_register); |
f6ebe77f | 108 | |
ca735b3a | 109 | void nf_log_unregister(struct nf_logger *logger) |
f6ebe77f | 110 | { |
205ee117 | 111 | const struct nf_logger *log; |
f6ebe77f HW |
112 | int i; |
113 | ||
9b73534d | 114 | mutex_lock(&nf_log_mutex); |
205ee117 FW |
115 | for (i = 0; i < NFPROTO_NUMPROTO; i++) { |
116 | log = nft_log_dereference(loggers[i][logger->type]); | |
117 | if (log == logger) | |
118 | RCU_INIT_POINTER(loggers[i][logger->type], NULL); | |
119 | } | |
9b73534d | 120 | mutex_unlock(&nf_log_mutex); |
ad5001cc | 121 | synchronize_rcu(); |
f6ebe77f | 122 | } |
e92ad99c | 123 | EXPORT_SYMBOL(nf_log_unregister); |
f6ebe77f | 124 | |
30e0c6a6 G |
125 | int nf_log_bind_pf(struct net *net, u_int8_t pf, |
126 | const struct nf_logger *logger) | |
ca735b3a | 127 | { |
30e0c6a6 | 128 | if (pf >= ARRAY_SIZE(net->nf.nf_loggers)) |
9ef0298a | 129 | return -EINVAL; |
ca735b3a EL |
130 | mutex_lock(&nf_log_mutex); |
131 | if (__find_logger(pf, logger->name) == NULL) { | |
132 | mutex_unlock(&nf_log_mutex); | |
133 | return -ENOENT; | |
134 | } | |
30e0c6a6 | 135 | rcu_assign_pointer(net->nf.nf_loggers[pf], logger); |
ca735b3a EL |
136 | mutex_unlock(&nf_log_mutex); |
137 | return 0; | |
138 | } | |
139 | EXPORT_SYMBOL(nf_log_bind_pf); | |
140 | ||
30e0c6a6 | 141 | void nf_log_unbind_pf(struct net *net, u_int8_t pf) |
ca735b3a | 142 | { |
30e0c6a6 | 143 | if (pf >= ARRAY_SIZE(net->nf.nf_loggers)) |
9ef0298a | 144 | return; |
ca735b3a | 145 | mutex_lock(&nf_log_mutex); |
30e0c6a6 | 146 | RCU_INIT_POINTER(net->nf.nf_loggers[pf], NULL); |
ca735b3a EL |
147 | mutex_unlock(&nf_log_mutex); |
148 | } | |
149 | EXPORT_SYMBOL(nf_log_unbind_pf); | |
150 | ||
960649d1 PNA |
151 | void nf_logger_request_module(int pf, enum nf_log_type type) |
152 | { | |
153 | if (loggers[pf][type] == NULL) | |
154 | request_module("nf-logger-%u-%u", pf, type); | |
155 | } | |
156 | EXPORT_SYMBOL_GPL(nf_logger_request_module); | |
157 | ||
fab4085f PNA |
158 | int nf_logger_find_get(int pf, enum nf_log_type type) |
159 | { | |
160 | struct nf_logger *logger; | |
161 | int ret = -ENOENT; | |
162 | ||
f3bb5333 LZ |
163 | if (pf == NFPROTO_INET) { |
164 | ret = nf_logger_find_get(NFPROTO_IPV4, type); | |
165 | if (ret < 0) | |
166 | return ret; | |
167 | ||
168 | ret = nf_logger_find_get(NFPROTO_IPV6, type); | |
169 | if (ret < 0) { | |
170 | nf_logger_put(NFPROTO_IPV4, type); | |
171 | return ret; | |
172 | } | |
173 | ||
174 | return 0; | |
175 | } | |
176 | ||
c5a589cc | 177 | if (rcu_access_pointer(loggers[pf][type]) == NULL) |
fab4085f PNA |
178 | request_module("nf-logger-%u-%u", pf, type); |
179 | ||
180 | rcu_read_lock(); | |
181 | logger = rcu_dereference(loggers[pf][type]); | |
182 | if (logger == NULL) | |
183 | goto out; | |
184 | ||
7e53e7f8 | 185 | if (try_module_get(logger->me)) |
fab4085f PNA |
186 | ret = 0; |
187 | out: | |
188 | rcu_read_unlock(); | |
189 | return ret; | |
190 | } | |
191 | EXPORT_SYMBOL_GPL(nf_logger_find_get); | |
192 | ||
193 | void nf_logger_put(int pf, enum nf_log_type type) | |
194 | { | |
195 | struct nf_logger *logger; | |
196 | ||
f3bb5333 LZ |
197 | if (pf == NFPROTO_INET) { |
198 | nf_logger_put(NFPROTO_IPV4, type); | |
199 | nf_logger_put(NFPROTO_IPV6, type); | |
200 | return; | |
201 | } | |
202 | ||
fab4085f PNA |
203 | BUG_ON(loggers[pf][type] == NULL); |
204 | ||
205 | rcu_read_lock(); | |
206 | logger = rcu_dereference(loggers[pf][type]); | |
207 | module_put(logger->me); | |
208 | rcu_read_unlock(); | |
209 | } | |
210 | EXPORT_SYMBOL_GPL(nf_logger_put); | |
211 | ||
30e0c6a6 G |
212 | void nf_log_packet(struct net *net, |
213 | u_int8_t pf, | |
f6ebe77f HW |
214 | unsigned int hooknum, |
215 | const struct sk_buff *skb, | |
216 | const struct net_device *in, | |
217 | const struct net_device *out, | |
7b2f9631 | 218 | const struct nf_loginfo *loginfo, |
f6ebe77f HW |
219 | const char *fmt, ...) |
220 | { | |
221 | va_list args; | |
222 | char prefix[NF_LOG_PREFIXLEN]; | |
7b2f9631 | 223 | const struct nf_logger *logger; |
601e68e1 | 224 | |
f6ebe77f | 225 | rcu_read_lock(); |
fab4085f PNA |
226 | if (loginfo != NULL) |
227 | logger = rcu_dereference(loggers[pf][loginfo->type]); | |
228 | else | |
229 | logger = rcu_dereference(net->nf.nf_loggers[pf]); | |
230 | ||
f6ebe77f HW |
231 | if (logger) { |
232 | va_start(args, fmt); | |
233 | vsnprintf(prefix, sizeof(prefix), fmt, args); | |
234 | va_end(args); | |
8cdb46da | 235 | logger->logfn(net, pf, hooknum, skb, in, out, loginfo, prefix); |
f6ebe77f HW |
236 | } |
237 | rcu_read_unlock(); | |
238 | } | |
239 | EXPORT_SYMBOL(nf_log_packet); | |
240 | ||
4017a7ee PNA |
241 | void nf_log_trace(struct net *net, |
242 | u_int8_t pf, | |
243 | unsigned int hooknum, | |
244 | const struct sk_buff *skb, | |
245 | const struct net_device *in, | |
246 | const struct net_device *out, | |
247 | const struct nf_loginfo *loginfo, const char *fmt, ...) | |
248 | { | |
249 | va_list args; | |
250 | char prefix[NF_LOG_PREFIXLEN]; | |
251 | const struct nf_logger *logger; | |
252 | ||
253 | rcu_read_lock(); | |
254 | logger = rcu_dereference(net->nf.nf_loggers[pf]); | |
255 | if (logger) { | |
256 | va_start(args, fmt); | |
257 | vsnprintf(prefix, sizeof(prefix), fmt, args); | |
258 | va_end(args); | |
259 | logger->logfn(net, pf, hooknum, skb, in, out, loginfo, prefix); | |
260 | } | |
261 | rcu_read_unlock(); | |
262 | } | |
263 | EXPORT_SYMBOL(nf_log_trace); | |
264 | ||
27fd8d90 PNA |
265 | #define S_SIZE (1024 - (sizeof(unsigned int) + 1)) |
266 | ||
267 | struct nf_log_buf { | |
268 | unsigned int count; | |
269 | char buf[S_SIZE + 1]; | |
270 | }; | |
271 | static struct nf_log_buf emergency, *emergency_ptr = &emergency; | |
272 | ||
273 | __printf(2, 3) int nf_log_buf_add(struct nf_log_buf *m, const char *f, ...) | |
274 | { | |
275 | va_list args; | |
276 | int len; | |
277 | ||
278 | if (likely(m->count < S_SIZE)) { | |
279 | va_start(args, f); | |
280 | len = vsnprintf(m->buf + m->count, S_SIZE - m->count, f, args); | |
281 | va_end(args); | |
282 | if (likely(m->count + len < S_SIZE)) { | |
283 | m->count += len; | |
284 | return 0; | |
285 | } | |
286 | } | |
287 | m->count = S_SIZE; | |
288 | printk_once(KERN_ERR KBUILD_MODNAME " please increase S_SIZE\n"); | |
289 | return -1; | |
290 | } | |
291 | EXPORT_SYMBOL_GPL(nf_log_buf_add); | |
292 | ||
293 | struct nf_log_buf *nf_log_buf_open(void) | |
294 | { | |
295 | struct nf_log_buf *m = kmalloc(sizeof(*m), GFP_ATOMIC); | |
296 | ||
297 | if (unlikely(!m)) { | |
298 | local_bh_disable(); | |
299 | do { | |
300 | m = xchg(&emergency_ptr, NULL); | |
301 | } while (!m); | |
302 | } | |
303 | m->count = 0; | |
304 | return m; | |
305 | } | |
306 | EXPORT_SYMBOL_GPL(nf_log_buf_open); | |
307 | ||
308 | void nf_log_buf_close(struct nf_log_buf *m) | |
309 | { | |
310 | m->buf[m->count] = 0; | |
311 | printk("%s\n", m->buf); | |
312 | ||
313 | if (likely(m != &emergency)) | |
314 | kfree(m); | |
315 | else { | |
316 | emergency_ptr = m; | |
317 | local_bh_enable(); | |
318 | } | |
319 | } | |
320 | EXPORT_SYMBOL_GPL(nf_log_buf_close); | |
321 | ||
f6ebe77f HW |
322 | #ifdef CONFIG_PROC_FS |
323 | static void *seq_start(struct seq_file *seq, loff_t *pos) | |
324 | { | |
30e0c6a6 G |
325 | struct net *net = seq_file_net(seq); |
326 | ||
6440fe05 | 327 | mutex_lock(&nf_log_mutex); |
f6ebe77f | 328 | |
30e0c6a6 | 329 | if (*pos >= ARRAY_SIZE(net->nf.nf_loggers)) |
f6ebe77f HW |
330 | return NULL; |
331 | ||
332 | return pos; | |
333 | } | |
334 | ||
335 | static void *seq_next(struct seq_file *s, void *v, loff_t *pos) | |
336 | { | |
30e0c6a6 G |
337 | struct net *net = seq_file_net(s); |
338 | ||
f6ebe77f HW |
339 | (*pos)++; |
340 | ||
30e0c6a6 | 341 | if (*pos >= ARRAY_SIZE(net->nf.nf_loggers)) |
f6ebe77f HW |
342 | return NULL; |
343 | ||
344 | return pos; | |
345 | } | |
346 | ||
347 | static void seq_stop(struct seq_file *s, void *v) | |
348 | { | |
6440fe05 | 349 | mutex_unlock(&nf_log_mutex); |
f6ebe77f HW |
350 | } |
351 | ||
352 | static int seq_show(struct seq_file *s, void *v) | |
353 | { | |
354 | loff_t *pos = v; | |
355 | const struct nf_logger *logger; | |
e71456ae | 356 | int i; |
30e0c6a6 | 357 | struct net *net = seq_file_net(s); |
f6ebe77f | 358 | |
0c26ed1c | 359 | logger = nft_log_dereference(net->nf.nf_loggers[*pos]); |
f6ebe77f HW |
360 | |
361 | if (!logger) | |
e71456ae | 362 | seq_printf(s, "%2lld NONE (", *pos); |
c7a913cd | 363 | else |
e71456ae | 364 | seq_printf(s, "%2lld %s (", *pos, logger->name); |
c7a913cd | 365 | |
e71456ae SRRH |
366 | if (seq_has_overflowed(s)) |
367 | return -ENOSPC; | |
c7a913cd | 368 | |
5962815a PNA |
369 | for (i = 0; i < NF_LOG_TYPE_MAX; i++) { |
370 | if (loggers[*pos][i] == NULL) | |
371 | continue; | |
372 | ||
0c26ed1c | 373 | logger = nft_log_dereference(loggers[*pos][i]); |
e71456ae SRRH |
374 | seq_printf(s, "%s", logger->name); |
375 | if (i == 0 && loggers[*pos][i + 1] != NULL) | |
376 | seq_printf(s, ","); | |
377 | ||
378 | if (seq_has_overflowed(s)) | |
379 | return -ENOSPC; | |
c7a913cd | 380 | } |
601e68e1 | 381 | |
e71456ae SRRH |
382 | seq_printf(s, ")\n"); |
383 | ||
384 | if (seq_has_overflowed(s)) | |
385 | return -ENOSPC; | |
386 | return 0; | |
f6ebe77f HW |
387 | } |
388 | ||
56b3d975 | 389 | static const struct seq_operations nflog_seq_ops = { |
f6ebe77f HW |
390 | .start = seq_start, |
391 | .next = seq_next, | |
392 | .stop = seq_stop, | |
393 | .show = seq_show, | |
394 | }; | |
395 | ||
396 | static int nflog_open(struct inode *inode, struct file *file) | |
397 | { | |
30e0c6a6 G |
398 | return seq_open_net(inode, file, &nflog_seq_ops, |
399 | sizeof(struct seq_net_private)); | |
f6ebe77f HW |
400 | } |
401 | ||
da7071d7 | 402 | static const struct file_operations nflog_file_ops = { |
f6ebe77f HW |
403 | .owner = THIS_MODULE, |
404 | .open = nflog_open, | |
405 | .read = seq_read, | |
406 | .llseek = seq_lseek, | |
30e0c6a6 | 407 | .release = seq_release_net, |
f6ebe77f HW |
408 | }; |
409 | ||
17625274 | 410 | |
f6ebe77f HW |
411 | #endif /* PROC_FS */ |
412 | ||
17625274 | 413 | #ifdef CONFIG_SYSCTL |
17625274 EL |
414 | static char nf_log_sysctl_fnames[NFPROTO_NUMPROTO-NFPROTO_UNSPEC][3]; |
415 | static struct ctl_table nf_log_sysctl_table[NFPROTO_NUMPROTO+1]; | |
f6ebe77f | 416 | |
fe2c6338 | 417 | static int nf_log_proc_dostring(struct ctl_table *table, int write, |
24955619 | 418 | void __user *buffer, size_t *lenp, loff_t *ppos) |
17625274 EL |
419 | { |
420 | const struct nf_logger *logger; | |
24955619 | 421 | char buf[NFLOGGER_NAME_LEN]; |
17625274 EL |
422 | int r = 0; |
423 | int tindex = (unsigned long)table->extra1; | |
dbb5918c | 424 | struct net *net = table->extra2; |
17625274 EL |
425 | |
426 | if (write) { | |
c6ac37d8 PT |
427 | struct ctl_table tmp = *table; |
428 | ||
429 | tmp.data = buf; | |
430 | r = proc_dostring(&tmp, write, buffer, lenp, ppos); | |
431 | if (r) | |
432 | return r; | |
24955619 PM |
433 | |
434 | if (!strcmp(buf, "NONE")) { | |
30e0c6a6 | 435 | nf_log_unbind_pf(net, tindex); |
17625274 EL |
436 | return 0; |
437 | } | |
438 | mutex_lock(&nf_log_mutex); | |
24955619 | 439 | logger = __find_logger(tindex, buf); |
17625274 EL |
440 | if (logger == NULL) { |
441 | mutex_unlock(&nf_log_mutex); | |
442 | return -ENOENT; | |
443 | } | |
30e0c6a6 | 444 | rcu_assign_pointer(net->nf.nf_loggers[tindex], logger); |
17625274 EL |
445 | mutex_unlock(&nf_log_mutex); |
446 | } else { | |
266d07cb | 447 | mutex_lock(&nf_log_mutex); |
0c26ed1c | 448 | logger = nft_log_dereference(net->nf.nf_loggers[tindex]); |
17625274 EL |
449 | if (!logger) |
450 | table->data = "NONE"; | |
451 | else | |
452 | table->data = logger->name; | |
8d65af78 | 453 | r = proc_dostring(table, write, buffer, lenp, ppos); |
266d07cb | 454 | mutex_unlock(&nf_log_mutex); |
17625274 EL |
455 | } |
456 | ||
457 | return r; | |
458 | } | |
459 | ||
30e0c6a6 | 460 | static int netfilter_log_sysctl_init(struct net *net) |
f6ebe77f | 461 | { |
ca735b3a | 462 | int i; |
30e0c6a6 G |
463 | struct ctl_table *table; |
464 | ||
465 | table = nf_log_sysctl_table; | |
466 | if (!net_eq(net, &init_net)) { | |
467 | table = kmemdup(nf_log_sysctl_table, | |
468 | sizeof(nf_log_sysctl_table), | |
469 | GFP_KERNEL); | |
470 | if (!table) | |
471 | goto err_alloc; | |
472 | } else { | |
473 | for (i = NFPROTO_UNSPEC; i < NFPROTO_NUMPROTO; i++) { | |
474 | snprintf(nf_log_sysctl_fnames[i], | |
475 | 3, "%d", i); | |
476 | nf_log_sysctl_table[i].procname = | |
477 | nf_log_sysctl_fnames[i]; | |
8aefc4d1 | 478 | nf_log_sysctl_table[i].maxlen = NFLOGGER_NAME_LEN; |
30e0c6a6 G |
479 | nf_log_sysctl_table[i].mode = 0644; |
480 | nf_log_sysctl_table[i].proc_handler = | |
481 | nf_log_proc_dostring; | |
482 | nf_log_sysctl_table[i].extra1 = | |
483 | (void *)(unsigned long) i; | |
484 | } | |
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); | |
501 | err_alloc: | |
502 | return -ENOMEM; | |
503 | } | |
504 | ||
505 | static void netfilter_log_sysctl_exit(struct net *net) | |
506 | { | |
507 | struct ctl_table *table; | |
508 | ||
509 | table = net->nf.nf_log_dir_header->ctl_table_arg; | |
510 | unregister_net_sysctl_table(net->nf.nf_log_dir_header); | |
511 | if (!net_eq(net, &init_net)) | |
512 | kfree(table); | |
17625274 EL |
513 | } |
514 | #else | |
30e0c6a6 | 515 | static int netfilter_log_sysctl_init(struct net *net) |
17625274 EL |
516 | { |
517 | return 0; | |
518 | } | |
30e0c6a6 G |
519 | |
520 | static void netfilter_log_sysctl_exit(struct net *net) | |
521 | { | |
522 | } | |
17625274 EL |
523 | #endif /* CONFIG_SYSCTL */ |
524 | ||
30e0c6a6 | 525 | static int __net_init nf_log_net_init(struct net *net) |
17625274 | 526 | { |
30e0c6a6 G |
527 | int ret = -ENOMEM; |
528 | ||
f6ebe77f | 529 | #ifdef CONFIG_PROC_FS |
8eeee8b1 | 530 | if (!proc_create("nf_log", S_IRUGO, |
30e0c6a6 G |
531 | net->nf.proc_netfilter, &nflog_file_ops)) |
532 | return ret; | |
62243927 | 533 | #endif |
30e0c6a6 G |
534 | ret = netfilter_log_sysctl_init(net); |
535 | if (ret < 0) | |
536 | goto out_sysctl; | |
ca735b3a | 537 | |
30e0c6a6 G |
538 | return 0; |
539 | ||
540 | out_sysctl: | |
e778f56e | 541 | #ifdef CONFIG_PROC_FS |
6d11cfdb | 542 | remove_proc_entry("nf_log", net->nf.proc_netfilter); |
e778f56e | 543 | #endif |
30e0c6a6 G |
544 | return ret; |
545 | } | |
546 | ||
547 | static void __net_exit nf_log_net_exit(struct net *net) | |
548 | { | |
549 | netfilter_log_sysctl_exit(net); | |
e778f56e | 550 | #ifdef CONFIG_PROC_FS |
30e0c6a6 | 551 | remove_proc_entry("nf_log", net->nf.proc_netfilter); |
e778f56e | 552 | #endif |
30e0c6a6 G |
553 | } |
554 | ||
555 | static struct pernet_operations nf_log_net_ops = { | |
556 | .init = nf_log_net_init, | |
557 | .exit = nf_log_net_exit, | |
558 | }; | |
559 | ||
560 | int __init netfilter_log_init(void) | |
561 | { | |
5962815a | 562 | return register_pernet_subsys(&nf_log_net_ops); |
f6ebe77f | 563 | } |