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 | |
2851940f MK |
18 | int sysctl_nf_log_all_netns __read_mostly; |
19 | EXPORT_SYMBOL(sysctl_nf_log_all_netns); | |
20 | ||
5962815a | 21 | static struct nf_logger __rcu *loggers[NFPROTO_NUMPROTO][NF_LOG_TYPE_MAX] __read_mostly; |
9b73534d | 22 | static DEFINE_MUTEX(nf_log_mutex); |
f6ebe77f | 23 | |
0c26ed1c ML |
24 | #define nft_log_dereference(logger) \ |
25 | rcu_dereference_protected(logger, lockdep_is_held(&nf_log_mutex)) | |
26 | ||
ca735b3a | 27 | static struct nf_logger *__find_logger(int pf, const char *str_logger) |
f6ebe77f | 28 | { |
5962815a PNA |
29 | struct nf_logger *log; |
30 | int i; | |
31 | ||
32 | for (i = 0; i < NF_LOG_TYPE_MAX; i++) { | |
33 | if (loggers[pf][i] == NULL) | |
34 | continue; | |
f6ebe77f | 35 | |
0c26ed1c | 36 | log = nft_log_dereference(loggers[pf][i]); |
18082746 | 37 | if (!strncasecmp(str_logger, log->name, strlen(log->name))) |
5962815a | 38 | return log; |
ca735b3a | 39 | } |
d72367b6 | 40 | |
ca735b3a | 41 | return NULL; |
601e68e1 | 42 | } |
f6ebe77f | 43 | |
779994fa | 44 | int nf_log_set(struct net *net, u_int8_t pf, const struct nf_logger *logger) |
30e0c6a6 G |
45 | { |
46 | const struct nf_logger *log; | |
47 | ||
779994fa GF |
48 | if (pf == NFPROTO_UNSPEC || pf >= ARRAY_SIZE(net->nf.nf_loggers)) |
49 | return -EOPNOTSUPP; | |
30e0c6a6 G |
50 | |
51 | mutex_lock(&nf_log_mutex); | |
0c26ed1c | 52 | log = nft_log_dereference(net->nf.nf_loggers[pf]); |
30e0c6a6 G |
53 | if (log == NULL) |
54 | rcu_assign_pointer(net->nf.nf_loggers[pf], logger); | |
55 | ||
56 | mutex_unlock(&nf_log_mutex); | |
779994fa GF |
57 | |
58 | return 0; | |
30e0c6a6 G |
59 | } |
60 | EXPORT_SYMBOL(nf_log_set); | |
61 | ||
62 | void nf_log_unset(struct net *net, const struct nf_logger *logger) | |
63 | { | |
64 | int i; | |
65 | const struct nf_logger *log; | |
66 | ||
30e0c6a6 G |
67 | mutex_lock(&nf_log_mutex); |
68 | for (i = 0; i < NFPROTO_NUMPROTO; i++) { | |
0c26ed1c | 69 | log = nft_log_dereference(net->nf.nf_loggers[i]); |
30e0c6a6 G |
70 | if (log == logger) |
71 | RCU_INIT_POINTER(net->nf.nf_loggers[i], NULL); | |
72 | } | |
73 | mutex_unlock(&nf_log_mutex); | |
30e0c6a6 G |
74 | } |
75 | EXPORT_SYMBOL(nf_log_unset); | |
76 | ||
d93cf068 | 77 | /* return EEXIST if the same logger is registered, 0 on success. */ |
ca735b3a | 78 | int nf_log_register(u_int8_t pf, struct nf_logger *logger) |
f6ebe77f | 79 | { |
b6f0a365 | 80 | int i; |
8ac2bde2 | 81 | int ret = 0; |
ca735b3a | 82 | |
30e0c6a6 | 83 | if (pf >= ARRAY_SIZE(init_net.nf.nf_loggers)) |
ca735b3a EL |
84 | return -EINVAL; |
85 | ||
9b73534d | 86 | mutex_lock(&nf_log_mutex); |
ca735b3a EL |
87 | |
88 | if (pf == NFPROTO_UNSPEC) { | |
8ac2bde2 ML |
89 | for (i = NFPROTO_UNSPEC; i < NFPROTO_NUMPROTO; i++) { |
90 | if (rcu_access_pointer(loggers[i][logger->type])) { | |
91 | ret = -EEXIST; | |
92 | goto unlock; | |
93 | } | |
94 | } | |
ca735b3a | 95 | for (i = NFPROTO_UNSPEC; i < NFPROTO_NUMPROTO; i++) |
5962815a | 96 | rcu_assign_pointer(loggers[i][logger->type], logger); |
ca735b3a | 97 | } else { |
8ac2bde2 ML |
98 | if (rcu_access_pointer(loggers[pf][logger->type])) { |
99 | ret = -EEXIST; | |
100 | goto unlock; | |
101 | } | |
5962815a | 102 | rcu_assign_pointer(loggers[pf][logger->type], logger); |
ca735b3a EL |
103 | } |
104 | ||
8ac2bde2 | 105 | unlock: |
9b73534d | 106 | mutex_unlock(&nf_log_mutex); |
8ac2bde2 | 107 | return ret; |
f6ebe77f | 108 | } |
ca735b3a | 109 | EXPORT_SYMBOL(nf_log_register); |
f6ebe77f | 110 | |
ca735b3a | 111 | void nf_log_unregister(struct nf_logger *logger) |
f6ebe77f | 112 | { |
205ee117 | 113 | const struct nf_logger *log; |
f6ebe77f HW |
114 | int i; |
115 | ||
9b73534d | 116 | mutex_lock(&nf_log_mutex); |
205ee117 FW |
117 | for (i = 0; i < NFPROTO_NUMPROTO; i++) { |
118 | log = nft_log_dereference(loggers[i][logger->type]); | |
119 | if (log == logger) | |
120 | RCU_INIT_POINTER(loggers[i][logger->type], NULL); | |
121 | } | |
9b73534d | 122 | mutex_unlock(&nf_log_mutex); |
ad5001cc | 123 | synchronize_rcu(); |
f6ebe77f | 124 | } |
e92ad99c | 125 | EXPORT_SYMBOL(nf_log_unregister); |
f6ebe77f | 126 | |
30e0c6a6 G |
127 | int nf_log_bind_pf(struct net *net, u_int8_t pf, |
128 | const struct nf_logger *logger) | |
ca735b3a | 129 | { |
30e0c6a6 | 130 | if (pf >= ARRAY_SIZE(net->nf.nf_loggers)) |
9ef0298a | 131 | return -EINVAL; |
ca735b3a EL |
132 | mutex_lock(&nf_log_mutex); |
133 | if (__find_logger(pf, logger->name) == NULL) { | |
134 | mutex_unlock(&nf_log_mutex); | |
135 | return -ENOENT; | |
136 | } | |
30e0c6a6 | 137 | rcu_assign_pointer(net->nf.nf_loggers[pf], logger); |
ca735b3a EL |
138 | mutex_unlock(&nf_log_mutex); |
139 | return 0; | |
140 | } | |
141 | EXPORT_SYMBOL(nf_log_bind_pf); | |
142 | ||
30e0c6a6 | 143 | void nf_log_unbind_pf(struct net *net, u_int8_t pf) |
ca735b3a | 144 | { |
30e0c6a6 | 145 | if (pf >= ARRAY_SIZE(net->nf.nf_loggers)) |
9ef0298a | 146 | return; |
ca735b3a | 147 | mutex_lock(&nf_log_mutex); |
30e0c6a6 | 148 | RCU_INIT_POINTER(net->nf.nf_loggers[pf], NULL); |
ca735b3a EL |
149 | mutex_unlock(&nf_log_mutex); |
150 | } | |
151 | EXPORT_SYMBOL(nf_log_unbind_pf); | |
152 | ||
960649d1 PNA |
153 | void nf_logger_request_module(int pf, enum nf_log_type type) |
154 | { | |
155 | if (loggers[pf][type] == NULL) | |
156 | request_module("nf-logger-%u-%u", pf, type); | |
157 | } | |
158 | EXPORT_SYMBOL_GPL(nf_logger_request_module); | |
159 | ||
fab4085f PNA |
160 | int nf_logger_find_get(int pf, enum nf_log_type type) |
161 | { | |
162 | struct nf_logger *logger; | |
163 | int ret = -ENOENT; | |
164 | ||
f3bb5333 LZ |
165 | if (pf == NFPROTO_INET) { |
166 | ret = nf_logger_find_get(NFPROTO_IPV4, type); | |
167 | if (ret < 0) | |
168 | return ret; | |
169 | ||
170 | ret = nf_logger_find_get(NFPROTO_IPV6, type); | |
171 | if (ret < 0) { | |
172 | nf_logger_put(NFPROTO_IPV4, type); | |
173 | return ret; | |
174 | } | |
175 | ||
176 | return 0; | |
177 | } | |
178 | ||
c5a589cc | 179 | if (rcu_access_pointer(loggers[pf][type]) == NULL) |
fab4085f PNA |
180 | request_module("nf-logger-%u-%u", pf, type); |
181 | ||
182 | rcu_read_lock(); | |
183 | logger = rcu_dereference(loggers[pf][type]); | |
184 | if (logger == NULL) | |
185 | goto out; | |
186 | ||
7e53e7f8 | 187 | if (try_module_get(logger->me)) |
fab4085f PNA |
188 | ret = 0; |
189 | out: | |
190 | rcu_read_unlock(); | |
191 | return ret; | |
192 | } | |
193 | EXPORT_SYMBOL_GPL(nf_logger_find_get); | |
194 | ||
195 | void nf_logger_put(int pf, enum nf_log_type type) | |
196 | { | |
197 | struct nf_logger *logger; | |
198 | ||
f3bb5333 LZ |
199 | if (pf == NFPROTO_INET) { |
200 | nf_logger_put(NFPROTO_IPV4, type); | |
201 | nf_logger_put(NFPROTO_IPV6, type); | |
202 | return; | |
203 | } | |
204 | ||
fab4085f PNA |
205 | BUG_ON(loggers[pf][type] == NULL); |
206 | ||
207 | rcu_read_lock(); | |
208 | logger = rcu_dereference(loggers[pf][type]); | |
209 | module_put(logger->me); | |
210 | rcu_read_unlock(); | |
211 | } | |
212 | EXPORT_SYMBOL_GPL(nf_logger_put); | |
213 | ||
30e0c6a6 G |
214 | void nf_log_packet(struct net *net, |
215 | u_int8_t pf, | |
f6ebe77f HW |
216 | unsigned int hooknum, |
217 | const struct sk_buff *skb, | |
218 | const struct net_device *in, | |
219 | const struct net_device *out, | |
7b2f9631 | 220 | const struct nf_loginfo *loginfo, |
f6ebe77f HW |
221 | const char *fmt, ...) |
222 | { | |
223 | va_list args; | |
224 | char prefix[NF_LOG_PREFIXLEN]; | |
7b2f9631 | 225 | const struct nf_logger *logger; |
601e68e1 | 226 | |
f6ebe77f | 227 | rcu_read_lock(); |
fab4085f PNA |
228 | if (loginfo != NULL) |
229 | logger = rcu_dereference(loggers[pf][loginfo->type]); | |
230 | else | |
231 | logger = rcu_dereference(net->nf.nf_loggers[pf]); | |
232 | ||
f6ebe77f HW |
233 | if (logger) { |
234 | va_start(args, fmt); | |
235 | vsnprintf(prefix, sizeof(prefix), fmt, args); | |
236 | va_end(args); | |
8cdb46da | 237 | logger->logfn(net, pf, hooknum, skb, in, out, loginfo, prefix); |
f6ebe77f HW |
238 | } |
239 | rcu_read_unlock(); | |
240 | } | |
241 | EXPORT_SYMBOL(nf_log_packet); | |
242 | ||
4017a7ee PNA |
243 | void nf_log_trace(struct net *net, |
244 | u_int8_t pf, | |
245 | unsigned int hooknum, | |
246 | const struct sk_buff *skb, | |
247 | const struct net_device *in, | |
248 | const struct net_device *out, | |
249 | const struct nf_loginfo *loginfo, const char *fmt, ...) | |
250 | { | |
251 | va_list args; | |
252 | char prefix[NF_LOG_PREFIXLEN]; | |
253 | const struct nf_logger *logger; | |
254 | ||
255 | rcu_read_lock(); | |
256 | logger = rcu_dereference(net->nf.nf_loggers[pf]); | |
257 | if (logger) { | |
258 | va_start(args, fmt); | |
259 | vsnprintf(prefix, sizeof(prefix), fmt, args); | |
260 | va_end(args); | |
261 | logger->logfn(net, pf, hooknum, skb, in, out, loginfo, prefix); | |
262 | } | |
263 | rcu_read_unlock(); | |
264 | } | |
265 | EXPORT_SYMBOL(nf_log_trace); | |
266 | ||
27fd8d90 PNA |
267 | #define S_SIZE (1024 - (sizeof(unsigned int) + 1)) |
268 | ||
269 | struct nf_log_buf { | |
270 | unsigned int count; | |
271 | char buf[S_SIZE + 1]; | |
272 | }; | |
273 | static struct nf_log_buf emergency, *emergency_ptr = &emergency; | |
274 | ||
275 | __printf(2, 3) int nf_log_buf_add(struct nf_log_buf *m, const char *f, ...) | |
276 | { | |
277 | va_list args; | |
278 | int len; | |
279 | ||
280 | if (likely(m->count < S_SIZE)) { | |
281 | va_start(args, f); | |
282 | len = vsnprintf(m->buf + m->count, S_SIZE - m->count, f, args); | |
283 | va_end(args); | |
284 | if (likely(m->count + len < S_SIZE)) { | |
285 | m->count += len; | |
286 | return 0; | |
287 | } | |
288 | } | |
289 | m->count = S_SIZE; | |
290 | printk_once(KERN_ERR KBUILD_MODNAME " please increase S_SIZE\n"); | |
291 | return -1; | |
292 | } | |
293 | EXPORT_SYMBOL_GPL(nf_log_buf_add); | |
294 | ||
295 | struct nf_log_buf *nf_log_buf_open(void) | |
296 | { | |
297 | struct nf_log_buf *m = kmalloc(sizeof(*m), GFP_ATOMIC); | |
298 | ||
299 | if (unlikely(!m)) { | |
300 | local_bh_disable(); | |
301 | do { | |
302 | m = xchg(&emergency_ptr, NULL); | |
303 | } while (!m); | |
304 | } | |
305 | m->count = 0; | |
306 | return m; | |
307 | } | |
308 | EXPORT_SYMBOL_GPL(nf_log_buf_open); | |
309 | ||
310 | void nf_log_buf_close(struct nf_log_buf *m) | |
311 | { | |
312 | m->buf[m->count] = 0; | |
313 | printk("%s\n", m->buf); | |
314 | ||
315 | if (likely(m != &emergency)) | |
316 | kfree(m); | |
317 | else { | |
318 | emergency_ptr = m; | |
319 | local_bh_enable(); | |
320 | } | |
321 | } | |
322 | EXPORT_SYMBOL_GPL(nf_log_buf_close); | |
323 | ||
f6ebe77f HW |
324 | #ifdef CONFIG_PROC_FS |
325 | static void *seq_start(struct seq_file *seq, loff_t *pos) | |
326 | { | |
30e0c6a6 G |
327 | struct net *net = seq_file_net(seq); |
328 | ||
6440fe05 | 329 | mutex_lock(&nf_log_mutex); |
f6ebe77f | 330 | |
30e0c6a6 | 331 | if (*pos >= ARRAY_SIZE(net->nf.nf_loggers)) |
f6ebe77f HW |
332 | return NULL; |
333 | ||
334 | return pos; | |
335 | } | |
336 | ||
337 | static void *seq_next(struct seq_file *s, void *v, loff_t *pos) | |
338 | { | |
30e0c6a6 G |
339 | struct net *net = seq_file_net(s); |
340 | ||
f6ebe77f HW |
341 | (*pos)++; |
342 | ||
30e0c6a6 | 343 | if (*pos >= ARRAY_SIZE(net->nf.nf_loggers)) |
f6ebe77f HW |
344 | return NULL; |
345 | ||
346 | return pos; | |
347 | } | |
348 | ||
349 | static void seq_stop(struct seq_file *s, void *v) | |
350 | { | |
6440fe05 | 351 | mutex_unlock(&nf_log_mutex); |
f6ebe77f HW |
352 | } |
353 | ||
354 | static int seq_show(struct seq_file *s, void *v) | |
355 | { | |
356 | loff_t *pos = v; | |
357 | const struct nf_logger *logger; | |
e71456ae | 358 | int i; |
30e0c6a6 | 359 | struct net *net = seq_file_net(s); |
f6ebe77f | 360 | |
0c26ed1c | 361 | logger = nft_log_dereference(net->nf.nf_loggers[*pos]); |
f6ebe77f HW |
362 | |
363 | if (!logger) | |
e71456ae | 364 | seq_printf(s, "%2lld NONE (", *pos); |
c7a913cd | 365 | else |
e71456ae | 366 | seq_printf(s, "%2lld %s (", *pos, logger->name); |
c7a913cd | 367 | |
e71456ae SRRH |
368 | if (seq_has_overflowed(s)) |
369 | return -ENOSPC; | |
c7a913cd | 370 | |
5962815a PNA |
371 | for (i = 0; i < NF_LOG_TYPE_MAX; i++) { |
372 | if (loggers[*pos][i] == NULL) | |
373 | continue; | |
374 | ||
0c26ed1c | 375 | logger = nft_log_dereference(loggers[*pos][i]); |
e71456ae SRRH |
376 | seq_printf(s, "%s", logger->name); |
377 | if (i == 0 && loggers[*pos][i + 1] != NULL) | |
cdec2685 | 378 | seq_puts(s, ","); |
e71456ae SRRH |
379 | |
380 | if (seq_has_overflowed(s)) | |
381 | return -ENOSPC; | |
c7a913cd | 382 | } |
601e68e1 | 383 | |
cdec2685 | 384 | seq_puts(s, ")\n"); |
e71456ae SRRH |
385 | |
386 | if (seq_has_overflowed(s)) | |
387 | return -ENOSPC; | |
388 | return 0; | |
f6ebe77f HW |
389 | } |
390 | ||
56b3d975 | 391 | static const struct seq_operations nflog_seq_ops = { |
f6ebe77f HW |
392 | .start = seq_start, |
393 | .next = seq_next, | |
394 | .stop = seq_stop, | |
395 | .show = seq_show, | |
396 | }; | |
f6ebe77f HW |
397 | #endif /* PROC_FS */ |
398 | ||
17625274 | 399 | #ifdef CONFIG_SYSCTL |
17625274 EL |
400 | static char nf_log_sysctl_fnames[NFPROTO_NUMPROTO-NFPROTO_UNSPEC][3]; |
401 | static struct ctl_table nf_log_sysctl_table[NFPROTO_NUMPROTO+1]; | |
2851940f MK |
402 | static struct ctl_table_header *nf_log_sysctl_fhdr; |
403 | ||
404 | static struct ctl_table nf_log_sysctl_ftable[] = { | |
405 | { | |
406 | .procname = "nf_log_all_netns", | |
407 | .data = &sysctl_nf_log_all_netns, | |
408 | .maxlen = sizeof(sysctl_nf_log_all_netns), | |
409 | .mode = 0644, | |
410 | .proc_handler = proc_dointvec, | |
411 | }, | |
412 | { } | |
413 | }; | |
f6ebe77f | 414 | |
fe2c6338 | 415 | static int nf_log_proc_dostring(struct ctl_table *table, int write, |
24955619 | 416 | void __user *buffer, size_t *lenp, loff_t *ppos) |
17625274 EL |
417 | { |
418 | const struct nf_logger *logger; | |
24955619 | 419 | char buf[NFLOGGER_NAME_LEN]; |
17625274 EL |
420 | int r = 0; |
421 | int tindex = (unsigned long)table->extra1; | |
dbb5918c | 422 | struct net *net = table->extra2; |
17625274 EL |
423 | |
424 | if (write) { | |
c6ac37d8 PT |
425 | struct ctl_table tmp = *table; |
426 | ||
dffd22ae JH |
427 | /* proc_dostring() can append to existing strings, so we need to |
428 | * initialize it as an empty string. | |
429 | */ | |
430 | buf[0] = '\0'; | |
c6ac37d8 PT |
431 | tmp.data = buf; |
432 | r = proc_dostring(&tmp, write, buffer, lenp, ppos); | |
433 | if (r) | |
434 | return r; | |
24955619 PM |
435 | |
436 | if (!strcmp(buf, "NONE")) { | |
30e0c6a6 | 437 | nf_log_unbind_pf(net, tindex); |
17625274 EL |
438 | return 0; |
439 | } | |
440 | mutex_lock(&nf_log_mutex); | |
24955619 | 441 | logger = __find_logger(tindex, buf); |
17625274 EL |
442 | if (logger == NULL) { |
443 | mutex_unlock(&nf_log_mutex); | |
444 | return -ENOENT; | |
445 | } | |
30e0c6a6 | 446 | rcu_assign_pointer(net->nf.nf_loggers[tindex], logger); |
17625274 EL |
447 | mutex_unlock(&nf_log_mutex); |
448 | } else { | |
ce00bf07 JH |
449 | struct ctl_table tmp = *table; |
450 | ||
451 | tmp.data = buf; | |
266d07cb | 452 | mutex_lock(&nf_log_mutex); |
0c26ed1c | 453 | logger = nft_log_dereference(net->nf.nf_loggers[tindex]); |
17625274 | 454 | if (!logger) |
ce00bf07 | 455 | strlcpy(buf, "NONE", sizeof(buf)); |
17625274 | 456 | else |
ce00bf07 | 457 | strlcpy(buf, logger->name, sizeof(buf)); |
266d07cb | 458 | mutex_unlock(&nf_log_mutex); |
ce00bf07 | 459 | r = proc_dostring(&tmp, write, buffer, lenp, ppos); |
17625274 EL |
460 | } |
461 | ||
462 | return r; | |
463 | } | |
464 | ||
30e0c6a6 | 465 | static int netfilter_log_sysctl_init(struct net *net) |
f6ebe77f | 466 | { |
ca735b3a | 467 | int i; |
30e0c6a6 G |
468 | struct ctl_table *table; |
469 | ||
470 | table = nf_log_sysctl_table; | |
471 | if (!net_eq(net, &init_net)) { | |
472 | table = kmemdup(nf_log_sysctl_table, | |
473 | sizeof(nf_log_sysctl_table), | |
474 | GFP_KERNEL); | |
475 | if (!table) | |
476 | goto err_alloc; | |
477 | } else { | |
478 | for (i = NFPROTO_UNSPEC; i < NFPROTO_NUMPROTO; i++) { | |
479 | snprintf(nf_log_sysctl_fnames[i], | |
480 | 3, "%d", i); | |
481 | nf_log_sysctl_table[i].procname = | |
482 | nf_log_sysctl_fnames[i]; | |
8aefc4d1 | 483 | nf_log_sysctl_table[i].maxlen = NFLOGGER_NAME_LEN; |
30e0c6a6 G |
484 | nf_log_sysctl_table[i].mode = 0644; |
485 | nf_log_sysctl_table[i].proc_handler = | |
486 | nf_log_proc_dostring; | |
487 | nf_log_sysctl_table[i].extra1 = | |
488 | (void *)(unsigned long) i; | |
489 | } | |
2851940f MK |
490 | nf_log_sysctl_fhdr = register_net_sysctl(net, "net/netfilter", |
491 | nf_log_sysctl_ftable); | |
492 | if (!nf_log_sysctl_fhdr) | |
493 | goto err_freg; | |
17625274 EL |
494 | } |
495 | ||
dbb5918c JH |
496 | for (i = NFPROTO_UNSPEC; i < NFPROTO_NUMPROTO; i++) |
497 | table[i].extra2 = net; | |
498 | ||
30e0c6a6 G |
499 | net->nf.nf_log_dir_header = register_net_sysctl(net, |
500 | "net/netfilter/nf_log", | |
501 | table); | |
502 | if (!net->nf.nf_log_dir_header) | |
503 | goto err_reg; | |
17625274 EL |
504 | |
505 | return 0; | |
30e0c6a6 G |
506 | |
507 | err_reg: | |
508 | if (!net_eq(net, &init_net)) | |
509 | kfree(table); | |
2851940f MK |
510 | else |
511 | unregister_net_sysctl_table(nf_log_sysctl_fhdr); | |
512 | err_freg: | |
30e0c6a6 G |
513 | err_alloc: |
514 | return -ENOMEM; | |
515 | } | |
516 | ||
517 | static void netfilter_log_sysctl_exit(struct net *net) | |
518 | { | |
519 | struct ctl_table *table; | |
520 | ||
521 | table = net->nf.nf_log_dir_header->ctl_table_arg; | |
522 | unregister_net_sysctl_table(net->nf.nf_log_dir_header); | |
523 | if (!net_eq(net, &init_net)) | |
524 | kfree(table); | |
2851940f MK |
525 | else |
526 | unregister_net_sysctl_table(nf_log_sysctl_fhdr); | |
17625274 EL |
527 | } |
528 | #else | |
30e0c6a6 | 529 | static int netfilter_log_sysctl_init(struct net *net) |
17625274 EL |
530 | { |
531 | return 0; | |
532 | } | |
30e0c6a6 G |
533 | |
534 | static void netfilter_log_sysctl_exit(struct net *net) | |
535 | { | |
536 | } | |
17625274 EL |
537 | #endif /* CONFIG_SYSCTL */ |
538 | ||
30e0c6a6 | 539 | static int __net_init nf_log_net_init(struct net *net) |
17625274 | 540 | { |
30e0c6a6 G |
541 | int ret = -ENOMEM; |
542 | ||
f6ebe77f | 543 | #ifdef CONFIG_PROC_FS |
c3506372 CH |
544 | if (!proc_create_net("nf_log", 0444, net->nf.proc_netfilter, |
545 | &nflog_seq_ops, sizeof(struct seq_net_private))) | |
30e0c6a6 | 546 | return ret; |
62243927 | 547 | #endif |
30e0c6a6 G |
548 | ret = netfilter_log_sysctl_init(net); |
549 | if (ret < 0) | |
550 | goto out_sysctl; | |
ca735b3a | 551 | |
30e0c6a6 G |
552 | return 0; |
553 | ||
554 | out_sysctl: | |
e778f56e | 555 | #ifdef CONFIG_PROC_FS |
6d11cfdb | 556 | remove_proc_entry("nf_log", net->nf.proc_netfilter); |
e778f56e | 557 | #endif |
30e0c6a6 G |
558 | return ret; |
559 | } | |
560 | ||
561 | static void __net_exit nf_log_net_exit(struct net *net) | |
562 | { | |
563 | netfilter_log_sysctl_exit(net); | |
e778f56e | 564 | #ifdef CONFIG_PROC_FS |
30e0c6a6 | 565 | remove_proc_entry("nf_log", net->nf.proc_netfilter); |
e778f56e | 566 | #endif |
30e0c6a6 G |
567 | } |
568 | ||
569 | static struct pernet_operations nf_log_net_ops = { | |
570 | .init = nf_log_net_init, | |
571 | .exit = nf_log_net_exit, | |
572 | }; | |
573 | ||
574 | int __init netfilter_log_init(void) | |
575 | { | |
5962815a | 576 | return register_pernet_subsys(&nf_log_net_ops); |
f6ebe77f | 577 | } |