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Commit | Line | Data |
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0597f268 HW |
1 | /* |
2 | * This is a module which is used for logging packets to userspace via | |
3 | * nfetlink. | |
4 | * | |
5 | * (C) 2005 by Harald Welte <laforge@netfilter.org> | |
6 | * | |
7 | * Based on the old ipv4-only ipt_ULOG.c: | |
8 | * (C) 2000-2004 by Harald Welte <laforge@netfilter.org> | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License version 2 as | |
12 | * published by the Free Software Foundation. | |
0597f268 HW |
13 | */ |
14 | #include <linux/module.h> | |
15 | #include <linux/skbuff.h> | |
16 | #include <linux/init.h> | |
17 | #include <linux/ip.h> | |
18 | #include <linux/ipv6.h> | |
19 | #include <linux/netdevice.h> | |
20 | #include <linux/netfilter.h> | |
21 | #include <linux/netlink.h> | |
22 | #include <linux/netfilter/nfnetlink.h> | |
23 | #include <linux/netfilter/nfnetlink_log.h> | |
24 | #include <linux/spinlock.h> | |
25 | #include <linux/sysctl.h> | |
26 | #include <linux/proc_fs.h> | |
27 | #include <linux/security.h> | |
28 | #include <linux/list.h> | |
29 | #include <linux/jhash.h> | |
30 | #include <linux/random.h> | |
5a0e3ad6 | 31 | #include <linux/slab.h> |
0597f268 | 32 | #include <net/sock.h> |
f01ffbd6 | 33 | #include <net/netfilter/nf_log.h> |
d9e15007 | 34 | #include <net/netfilter/nfnetlink_log.h> |
0597f268 HW |
35 | |
36 | #include <asm/atomic.h> | |
37 | ||
fbcd923c HW |
38 | #ifdef CONFIG_BRIDGE_NETFILTER |
39 | #include "../bridge/br_private.h" | |
40 | #endif | |
41 | ||
c2db2924 | 42 | #define NFULNL_NLBUFSIZ_DEFAULT NLMSG_GOODSIZE |
2c6764b7 | 43 | #define NFULNL_TIMEOUT_DEFAULT 100 /* every second */ |
0597f268 | 44 | #define NFULNL_QTHRESH_DEFAULT 100 /* 100 packets */ |
6b6ec99a | 45 | #define NFULNL_COPY_RANGE_MAX 0xFFFF /* max packet size is limited by 16-bit struct nfattr nfa_len field */ |
0597f268 HW |
46 | |
47 | #define PRINTR(x, args...) do { if (net_ratelimit()) \ | |
48 | printk(x, ## args); } while (0); | |
49 | ||
0597f268 HW |
50 | struct nfulnl_instance { |
51 | struct hlist_node hlist; /* global list of instances */ | |
52 | spinlock_t lock; | |
53 | atomic_t use; /* use count */ | |
54 | ||
55 | unsigned int qlen; /* number of nlmsgs in skb */ | |
56 | struct sk_buff *skb; /* pre-allocatd skb */ | |
0597f268 HW |
57 | struct timer_list timer; |
58 | int peer_pid; /* PID of the peer process */ | |
59 | ||
60 | /* configurable parameters */ | |
61 | unsigned int flushtimeout; /* timeout until queue flush */ | |
62 | unsigned int nlbufsiz; /* netlink buffer allocation size */ | |
63 | unsigned int qthreshold; /* threshold of the queue */ | |
64 | u_int32_t copy_range; | |
0af5f6c1 | 65 | u_int32_t seq; /* instance-local sequential counter */ |
0597f268 | 66 | u_int16_t group_num; /* number of this queue */ |
0af5f6c1 | 67 | u_int16_t flags; |
601e68e1 | 68 | u_int8_t copy_mode; |
bed1be20 | 69 | struct rcu_head rcu; |
0597f268 HW |
70 | }; |
71 | ||
bed1be20 | 72 | static DEFINE_SPINLOCK(instances_lock); |
0af5f6c1 | 73 | static atomic_t global_seq; |
0597f268 HW |
74 | |
75 | #define INSTANCE_BUCKETS 16 | |
76 | static struct hlist_head instance_table[INSTANCE_BUCKETS]; | |
77 | static unsigned int hash_init; | |
78 | ||
79 | static inline u_int8_t instance_hashfn(u_int16_t group_num) | |
80 | { | |
81 | return ((group_num & 0xff) % INSTANCE_BUCKETS); | |
82 | } | |
83 | ||
84 | static struct nfulnl_instance * | |
85 | __instance_lookup(u_int16_t group_num) | |
86 | { | |
87 | struct hlist_head *head; | |
88 | struct hlist_node *pos; | |
89 | struct nfulnl_instance *inst; | |
90 | ||
0597f268 | 91 | head = &instance_table[instance_hashfn(group_num)]; |
bed1be20 | 92 | hlist_for_each_entry_rcu(inst, pos, head, hlist) { |
0597f268 HW |
93 | if (inst->group_num == group_num) |
94 | return inst; | |
95 | } | |
96 | return NULL; | |
97 | } | |
98 | ||
99 | static inline void | |
100 | instance_get(struct nfulnl_instance *inst) | |
101 | { | |
102 | atomic_inc(&inst->use); | |
103 | } | |
104 | ||
105 | static struct nfulnl_instance * | |
106 | instance_lookup_get(u_int16_t group_num) | |
107 | { | |
108 | struct nfulnl_instance *inst; | |
109 | ||
bed1be20 | 110 | rcu_read_lock_bh(); |
0597f268 | 111 | inst = __instance_lookup(group_num); |
f5c5440d ED |
112 | if (inst && !atomic_inc_not_zero(&inst->use)) |
113 | inst = NULL; | |
bed1be20 | 114 | rcu_read_unlock_bh(); |
0597f268 HW |
115 | |
116 | return inst; | |
117 | } | |
118 | ||
bed1be20 ED |
119 | static void nfulnl_instance_free_rcu(struct rcu_head *head) |
120 | { | |
121 | kfree(container_of(head, struct nfulnl_instance, rcu)); | |
122 | module_put(THIS_MODULE); | |
123 | } | |
124 | ||
0597f268 HW |
125 | static void |
126 | instance_put(struct nfulnl_instance *inst) | |
127 | { | |
bed1be20 ED |
128 | if (inst && atomic_dec_and_test(&inst->use)) |
129 | call_rcu_bh(&inst->rcu, nfulnl_instance_free_rcu); | |
0597f268 HW |
130 | } |
131 | ||
132 | static void nfulnl_timer(unsigned long data); | |
133 | ||
134 | static struct nfulnl_instance * | |
135 | instance_create(u_int16_t group_num, int pid) | |
136 | { | |
137 | struct nfulnl_instance *inst; | |
baab2ce7 | 138 | int err; |
0597f268 | 139 | |
bed1be20 | 140 | spin_lock_bh(&instances_lock); |
0597f268 | 141 | if (__instance_lookup(group_num)) { |
baab2ce7 | 142 | err = -EEXIST; |
0597f268 HW |
143 | goto out_unlock; |
144 | } | |
145 | ||
10dfdc69 | 146 | inst = kzalloc(sizeof(*inst), GFP_ATOMIC); |
baab2ce7 PM |
147 | if (!inst) { |
148 | err = -ENOMEM; | |
0597f268 | 149 | goto out_unlock; |
baab2ce7 | 150 | } |
0597f268 | 151 | |
aace57e0 MM |
152 | if (!try_module_get(THIS_MODULE)) { |
153 | kfree(inst); | |
baab2ce7 | 154 | err = -EAGAIN; |
aace57e0 MM |
155 | goto out_unlock; |
156 | } | |
157 | ||
0597f268 | 158 | INIT_HLIST_NODE(&inst->hlist); |
181a46a5 | 159 | spin_lock_init(&inst->lock); |
0597f268 HW |
160 | /* needs to be two, since we _put() after creation */ |
161 | atomic_set(&inst->use, 2); | |
162 | ||
e6f689db | 163 | setup_timer(&inst->timer, nfulnl_timer, (unsigned long)inst); |
0597f268 HW |
164 | |
165 | inst->peer_pid = pid; | |
166 | inst->group_num = group_num; | |
167 | ||
168 | inst->qthreshold = NFULNL_QTHRESH_DEFAULT; | |
169 | inst->flushtimeout = NFULNL_TIMEOUT_DEFAULT; | |
170 | inst->nlbufsiz = NFULNL_NLBUFSIZ_DEFAULT; | |
171 | inst->copy_mode = NFULNL_COPY_PACKET; | |
6b6ec99a | 172 | inst->copy_range = NFULNL_COPY_RANGE_MAX; |
0597f268 | 173 | |
f5c5440d | 174 | hlist_add_head_rcu(&inst->hlist, |
0597f268 HW |
175 | &instance_table[instance_hashfn(group_num)]); |
176 | ||
bed1be20 | 177 | spin_unlock_bh(&instances_lock); |
0597f268 HW |
178 | |
179 | return inst; | |
180 | ||
0597f268 | 181 | out_unlock: |
bed1be20 | 182 | spin_unlock_bh(&instances_lock); |
baab2ce7 | 183 | return ERR_PTR(err); |
0597f268 HW |
184 | } |
185 | ||
e3567061 | 186 | static void __nfulnl_flush(struct nfulnl_instance *inst); |
0597f268 | 187 | |
f5c5440d | 188 | /* called with BH disabled */ |
0597f268 | 189 | static void |
9afdb00c | 190 | __instance_destroy(struct nfulnl_instance *inst) |
0597f268 HW |
191 | { |
192 | /* first pull it out of the global list */ | |
f5c5440d | 193 | hlist_del_rcu(&inst->hlist); |
0597f268 | 194 | |
0597f268 HW |
195 | /* then flush all pending packets from skb */ |
196 | ||
f5c5440d ED |
197 | spin_lock(&inst->lock); |
198 | ||
199 | /* lockless readers wont be able to use us */ | |
200 | inst->copy_mode = NFULNL_COPY_DISABLED; | |
201 | ||
e3567061 MM |
202 | if (inst->skb) |
203 | __nfulnl_flush(inst); | |
f5c5440d | 204 | spin_unlock(&inst->lock); |
0597f268 HW |
205 | |
206 | /* and finally put the refcount */ | |
207 | instance_put(inst); | |
0597f268 HW |
208 | } |
209 | ||
0597f268 HW |
210 | static inline void |
211 | instance_destroy(struct nfulnl_instance *inst) | |
212 | { | |
bed1be20 | 213 | spin_lock_bh(&instances_lock); |
9afdb00c | 214 | __instance_destroy(inst); |
bed1be20 | 215 | spin_unlock_bh(&instances_lock); |
0597f268 HW |
216 | } |
217 | ||
218 | static int | |
219 | nfulnl_set_mode(struct nfulnl_instance *inst, u_int8_t mode, | |
220 | unsigned int range) | |
221 | { | |
222 | int status = 0; | |
223 | ||
224 | spin_lock_bh(&inst->lock); | |
601e68e1 | 225 | |
0597f268 HW |
226 | switch (mode) { |
227 | case NFULNL_COPY_NONE: | |
228 | case NFULNL_COPY_META: | |
229 | inst->copy_mode = mode; | |
230 | inst->copy_range = 0; | |
231 | break; | |
601e68e1 | 232 | |
0597f268 HW |
233 | case NFULNL_COPY_PACKET: |
234 | inst->copy_mode = mode; | |
6b6ec99a MM |
235 | inst->copy_range = min_t(unsigned int, |
236 | range, NFULNL_COPY_RANGE_MAX); | |
0597f268 | 237 | break; |
601e68e1 | 238 | |
0597f268 HW |
239 | default: |
240 | status = -EINVAL; | |
241 | break; | |
242 | } | |
243 | ||
244 | spin_unlock_bh(&inst->lock); | |
245 | ||
246 | return status; | |
247 | } | |
248 | ||
249 | static int | |
250 | nfulnl_set_nlbufsiz(struct nfulnl_instance *inst, u_int32_t nlbufsiz) | |
251 | { | |
252 | int status; | |
253 | ||
254 | spin_lock_bh(&inst->lock); | |
255 | if (nlbufsiz < NFULNL_NLBUFSIZ_DEFAULT) | |
256 | status = -ERANGE; | |
257 | else if (nlbufsiz > 131072) | |
258 | status = -ERANGE; | |
259 | else { | |
260 | inst->nlbufsiz = nlbufsiz; | |
261 | status = 0; | |
262 | } | |
263 | spin_unlock_bh(&inst->lock); | |
264 | ||
265 | return status; | |
266 | } | |
267 | ||
268 | static int | |
269 | nfulnl_set_timeout(struct nfulnl_instance *inst, u_int32_t timeout) | |
270 | { | |
271 | spin_lock_bh(&inst->lock); | |
272 | inst->flushtimeout = timeout; | |
273 | spin_unlock_bh(&inst->lock); | |
274 | ||
275 | return 0; | |
276 | } | |
277 | ||
278 | static int | |
279 | nfulnl_set_qthresh(struct nfulnl_instance *inst, u_int32_t qthresh) | |
280 | { | |
281 | spin_lock_bh(&inst->lock); | |
282 | inst->qthreshold = qthresh; | |
283 | spin_unlock_bh(&inst->lock); | |
284 | ||
285 | return 0; | |
286 | } | |
287 | ||
0af5f6c1 HW |
288 | static int |
289 | nfulnl_set_flags(struct nfulnl_instance *inst, u_int16_t flags) | |
290 | { | |
291 | spin_lock_bh(&inst->lock); | |
ee433530 | 292 | inst->flags = flags; |
0af5f6c1 HW |
293 | spin_unlock_bh(&inst->lock); |
294 | ||
295 | return 0; | |
296 | } | |
297 | ||
c6a8f648 MM |
298 | static struct sk_buff * |
299 | nfulnl_alloc_skb(unsigned int inst_size, unsigned int pkt_size) | |
0597f268 HW |
300 | { |
301 | struct sk_buff *skb; | |
ad2ad0f9 | 302 | unsigned int n; |
0597f268 | 303 | |
0597f268 HW |
304 | /* alloc skb which should be big enough for a whole multipart |
305 | * message. WARNING: has to be <= 128k due to slab restrictions */ | |
306 | ||
ad2ad0f9 PM |
307 | n = max(inst_size, pkt_size); |
308 | skb = alloc_skb(n, GFP_ATOMIC); | |
0597f268 | 309 | if (!skb) { |
654d0fbd | 310 | pr_notice("nfnetlink_log: can't alloc whole buffer (%u bytes)\n", |
0597f268 HW |
311 | inst_size); |
312 | ||
ad2ad0f9 PM |
313 | if (n > pkt_size) { |
314 | /* try to allocate only as much as we need for current | |
315 | * packet */ | |
0597f268 | 316 | |
ad2ad0f9 PM |
317 | skb = alloc_skb(pkt_size, GFP_ATOMIC); |
318 | if (!skb) | |
654d0fbd | 319 | pr_err("nfnetlink_log: can't even alloc %u " |
ad2ad0f9 PM |
320 | "bytes\n", pkt_size); |
321 | } | |
0597f268 HW |
322 | } |
323 | ||
324 | return skb; | |
325 | } | |
326 | ||
327 | static int | |
328 | __nfulnl_send(struct nfulnl_instance *inst) | |
329 | { | |
29c5d4af | 330 | int status = -1; |
0597f268 | 331 | |
0597f268 | 332 | if (inst->qlen > 1) |
29c5d4af EL |
333 | NLMSG_PUT(inst->skb, 0, 0, |
334 | NLMSG_DONE, | |
335 | sizeof(struct nfgenmsg)); | |
0597f268 | 336 | |
cd8c20b6 AD |
337 | status = nfnetlink_unicast(inst->skb, &init_net, inst->peer_pid, |
338 | MSG_DONTWAIT); | |
0597f268 HW |
339 | |
340 | inst->qlen = 0; | |
341 | inst->skb = NULL; | |
0597f268 | 342 | |
29c5d4af | 343 | nlmsg_failure: |
0597f268 HW |
344 | return status; |
345 | } | |
346 | ||
e3567061 MM |
347 | static void |
348 | __nfulnl_flush(struct nfulnl_instance *inst) | |
349 | { | |
350 | /* timer holds a reference */ | |
351 | if (del_timer(&inst->timer)) | |
352 | instance_put(inst); | |
353 | if (inst->skb) | |
354 | __nfulnl_send(inst); | |
355 | } | |
356 | ||
c6a8f648 MM |
357 | static void |
358 | nfulnl_timer(unsigned long data) | |
0597f268 | 359 | { |
601e68e1 | 360 | struct nfulnl_instance *inst = (struct nfulnl_instance *)data; |
0597f268 | 361 | |
0597f268 | 362 | spin_lock_bh(&inst->lock); |
370e6a87 MM |
363 | if (inst->skb) |
364 | __nfulnl_send(inst); | |
0597f268 | 365 | spin_unlock_bh(&inst->lock); |
05f7b7b3 | 366 | instance_put(inst); |
0597f268 HW |
367 | } |
368 | ||
0af5f6c1 HW |
369 | /* This is an inline function, we don't really care about a long |
370 | * list of arguments */ | |
601e68e1 | 371 | static inline int |
0597f268 | 372 | __build_packet_message(struct nfulnl_instance *inst, |
601e68e1 | 373 | const struct sk_buff *skb, |
0597f268 | 374 | unsigned int data_len, |
76108cea | 375 | u_int8_t pf, |
0597f268 HW |
376 | unsigned int hooknum, |
377 | const struct net_device *indev, | |
378 | const struct net_device *outdev, | |
379 | const struct nf_loginfo *li, | |
d7a5c324 | 380 | const char *prefix, unsigned int plen) |
0597f268 | 381 | { |
0597f268 HW |
382 | struct nfulnl_msg_packet_hdr pmsg; |
383 | struct nlmsghdr *nlh; | |
384 | struct nfgenmsg *nfmsg; | |
98a4a861 | 385 | __be32 tmp_uint; |
27a884dc | 386 | sk_buff_data_t old_tail = inst->skb->tail; |
0597f268 | 387 | |
601e68e1 | 388 | nlh = NLMSG_PUT(inst->skb, 0, 0, |
0597f268 HW |
389 | NFNL_SUBSYS_ULOG << 8 | NFULNL_MSG_PACKET, |
390 | sizeof(struct nfgenmsg)); | |
391 | nfmsg = NLMSG_DATA(nlh); | |
392 | nfmsg->nfgen_family = pf; | |
393 | nfmsg->version = NFNETLINK_V0; | |
394 | nfmsg->res_id = htons(inst->group_num); | |
395 | ||
febf0a43 | 396 | pmsg.hw_protocol = skb->protocol; |
0597f268 HW |
397 | pmsg.hook = hooknum; |
398 | ||
df6fb868 | 399 | NLA_PUT(inst->skb, NFULA_PACKET_HDR, sizeof(pmsg), &pmsg); |
0597f268 | 400 | |
d7a5c324 | 401 | if (prefix) |
df6fb868 | 402 | NLA_PUT(inst->skb, NFULA_PREFIX, plen, prefix); |
0597f268 HW |
403 | |
404 | if (indev) { | |
fbcd923c | 405 | #ifndef CONFIG_BRIDGE_NETFILTER |
0dfedd28 PM |
406 | NLA_PUT_BE32(inst->skb, NFULA_IFINDEX_INDEV, |
407 | htonl(indev->ifindex)); | |
fbcd923c HW |
408 | #else |
409 | if (pf == PF_BRIDGE) { | |
410 | /* Case 1: outdev is physical input device, we need to | |
411 | * look for bridge group (when called from | |
412 | * netfilter_bridge) */ | |
0dfedd28 PM |
413 | NLA_PUT_BE32(inst->skb, NFULA_IFINDEX_PHYSINDEV, |
414 | htonl(indev->ifindex)); | |
fbcd923c | 415 | /* this is the bridge group "brX" */ |
0dfedd28 PM |
416 | NLA_PUT_BE32(inst->skb, NFULA_IFINDEX_INDEV, |
417 | htonl(indev->br_port->br->dev->ifindex)); | |
fbcd923c HW |
418 | } else { |
419 | /* Case 2: indev is bridge group, we need to look for | |
420 | * physical device (when called from ipv4) */ | |
0dfedd28 PM |
421 | NLA_PUT_BE32(inst->skb, NFULA_IFINDEX_INDEV, |
422 | htonl(indev->ifindex)); | |
423 | if (skb->nf_bridge && skb->nf_bridge->physindev) | |
424 | NLA_PUT_BE32(inst->skb, NFULA_IFINDEX_PHYSINDEV, | |
425 | htonl(skb->nf_bridge->physindev->ifindex)); | |
fbcd923c HW |
426 | } |
427 | #endif | |
0597f268 HW |
428 | } |
429 | ||
430 | if (outdev) { | |
431 | tmp_uint = htonl(outdev->ifindex); | |
fbcd923c | 432 | #ifndef CONFIG_BRIDGE_NETFILTER |
0dfedd28 PM |
433 | NLA_PUT_BE32(inst->skb, NFULA_IFINDEX_OUTDEV, |
434 | htonl(outdev->ifindex)); | |
fbcd923c HW |
435 | #else |
436 | if (pf == PF_BRIDGE) { | |
437 | /* Case 1: outdev is physical output device, we need to | |
438 | * look for bridge group (when called from | |
439 | * netfilter_bridge) */ | |
0dfedd28 PM |
440 | NLA_PUT_BE32(inst->skb, NFULA_IFINDEX_PHYSOUTDEV, |
441 | htonl(outdev->ifindex)); | |
fbcd923c | 442 | /* this is the bridge group "brX" */ |
0dfedd28 PM |
443 | NLA_PUT_BE32(inst->skb, NFULA_IFINDEX_OUTDEV, |
444 | htonl(outdev->br_port->br->dev->ifindex)); | |
fbcd923c HW |
445 | } else { |
446 | /* Case 2: indev is a bridge group, we need to look | |
447 | * for physical device (when called from ipv4) */ | |
0dfedd28 PM |
448 | NLA_PUT_BE32(inst->skb, NFULA_IFINDEX_OUTDEV, |
449 | htonl(outdev->ifindex)); | |
450 | if (skb->nf_bridge && skb->nf_bridge->physoutdev) | |
451 | NLA_PUT_BE32(inst->skb, NFULA_IFINDEX_PHYSOUTDEV, | |
452 | htonl(skb->nf_bridge->physoutdev->ifindex)); | |
fbcd923c HW |
453 | } |
454 | #endif | |
0597f268 HW |
455 | } |
456 | ||
0dfedd28 PM |
457 | if (skb->mark) |
458 | NLA_PUT_BE32(inst->skb, NFULA_MARK, htonl(skb->mark)); | |
0597f268 | 459 | |
b95cce35 | 460 | if (indev && skb->dev) { |
0597f268 | 461 | struct nfulnl_msg_packet_hw phw; |
b95cce35 SH |
462 | int len = dev_parse_header(skb, phw.hw_addr); |
463 | if (len > 0) { | |
464 | phw.hw_addrlen = htons(len); | |
df6fb868 | 465 | NLA_PUT(inst->skb, NFULA_HWADDR, sizeof(phw), &phw); |
b95cce35 | 466 | } |
0597f268 HW |
467 | } |
468 | ||
72961ecf EL |
469 | if (indev && skb_mac_header_was_set(skb)) { |
470 | NLA_PUT_BE16(inst->skb, NFULA_HWTYPE, htons(skb->dev->type)); | |
471 | NLA_PUT_BE16(inst->skb, NFULA_HWLEN, | |
472 | htons(skb->dev->hard_header_len)); | |
473 | NLA_PUT(inst->skb, NFULA_HWHEADER, skb->dev->hard_header_len, | |
474 | skb_mac_header(skb)); | |
475 | } | |
476 | ||
b7aa0bf7 | 477 | if (skb->tstamp.tv64) { |
0597f268 | 478 | struct nfulnl_msg_packet_timestamp ts; |
b7aa0bf7 ED |
479 | struct timeval tv = ktime_to_timeval(skb->tstamp); |
480 | ts.sec = cpu_to_be64(tv.tv_sec); | |
481 | ts.usec = cpu_to_be64(tv.tv_usec); | |
0597f268 | 482 | |
df6fb868 | 483 | NLA_PUT(inst->skb, NFULA_TIMESTAMP, sizeof(ts), &ts); |
0597f268 HW |
484 | } |
485 | ||
486 | /* UID */ | |
487 | if (skb->sk) { | |
488 | read_lock_bh(&skb->sk->sk_callback_lock); | |
489 | if (skb->sk->sk_socket && skb->sk->sk_socket->file) { | |
d76b0d9b DH |
490 | struct file *file = skb->sk->sk_socket->file; |
491 | __be32 uid = htonl(file->f_cred->fsuid); | |
492 | __be32 gid = htonl(file->f_cred->fsgid); | |
df6fb868 | 493 | /* need to unlock here since NLA_PUT may goto */ |
0597f268 | 494 | read_unlock_bh(&skb->sk->sk_callback_lock); |
0dfedd28 | 495 | NLA_PUT_BE32(inst->skb, NFULA_UID, uid); |
76aa1ce1 | 496 | NLA_PUT_BE32(inst->skb, NFULA_GID, gid); |
0597f268 HW |
497 | } else |
498 | read_unlock_bh(&skb->sk->sk_callback_lock); | |
499 | } | |
500 | ||
0af5f6c1 | 501 | /* local sequence number */ |
0dfedd28 PM |
502 | if (inst->flags & NFULNL_CFG_F_SEQ) |
503 | NLA_PUT_BE32(inst->skb, NFULA_SEQ, htonl(inst->seq++)); | |
504 | ||
0af5f6c1 | 505 | /* global sequence number */ |
0dfedd28 PM |
506 | if (inst->flags & NFULNL_CFG_F_SEQ_GLOBAL) |
507 | NLA_PUT_BE32(inst->skb, NFULA_SEQ_GLOBAL, | |
508 | htonl(atomic_inc_return(&global_seq))); | |
0af5f6c1 | 509 | |
0597f268 | 510 | if (data_len) { |
df6fb868 PM |
511 | struct nlattr *nla; |
512 | int size = nla_attr_size(data_len); | |
0597f268 | 513 | |
df6fb868 | 514 | if (skb_tailroom(inst->skb) < nla_total_size(data_len)) { |
0597f268 HW |
515 | printk(KERN_WARNING "nfnetlink_log: no tailroom!\n"); |
516 | goto nlmsg_failure; | |
517 | } | |
518 | ||
df6fb868 PM |
519 | nla = (struct nlattr *)skb_put(inst->skb, nla_total_size(data_len)); |
520 | nla->nla_type = NFULA_PAYLOAD; | |
521 | nla->nla_len = size; | |
0597f268 | 522 | |
df6fb868 | 523 | if (skb_copy_bits(skb, 0, nla_data(nla), data_len)) |
0597f268 HW |
524 | BUG(); |
525 | } | |
601e68e1 | 526 | |
0597f268 HW |
527 | nlh->nlmsg_len = inst->skb->tail - old_tail; |
528 | return 0; | |
529 | ||
530 | nlmsg_failure: | |
df6fb868 | 531 | nla_put_failure: |
0597f268 HW |
532 | PRINTR(KERN_ERR "nfnetlink_log: error creating log nlmsg\n"); |
533 | return -1; | |
534 | } | |
535 | ||
536 | #define RCV_SKB_FAIL(err) do { netlink_ack(skb, nlh, (err)); return; } while (0) | |
537 | ||
538 | static struct nf_loginfo default_loginfo = { | |
539 | .type = NF_LOG_TYPE_ULOG, | |
540 | .u = { | |
541 | .ulog = { | |
542 | .copy_len = 0xffff, | |
543 | .group = 0, | |
544 | .qthreshold = 1, | |
545 | }, | |
546 | }, | |
547 | }; | |
548 | ||
549 | /* log handler for internal netfilter logging api */ | |
5f7340ef | 550 | void |
76108cea | 551 | nfulnl_log_packet(u_int8_t pf, |
0597f268 HW |
552 | unsigned int hooknum, |
553 | const struct sk_buff *skb, | |
554 | const struct net_device *in, | |
555 | const struct net_device *out, | |
556 | const struct nf_loginfo *li_user, | |
557 | const char *prefix) | |
558 | { | |
559 | unsigned int size, data_len; | |
560 | struct nfulnl_instance *inst; | |
561 | const struct nf_loginfo *li; | |
562 | unsigned int qthreshold; | |
d7a5c324 | 563 | unsigned int plen; |
0597f268 | 564 | |
601e68e1 | 565 | if (li_user && li_user->type == NF_LOG_TYPE_ULOG) |
0597f268 HW |
566 | li = li_user; |
567 | else | |
568 | li = &default_loginfo; | |
569 | ||
570 | inst = instance_lookup_get(li->u.ulog.group); | |
571 | if (!inst) | |
0597f268 | 572 | return; |
0597f268 | 573 | |
d7a5c324 PM |
574 | plen = 0; |
575 | if (prefix) | |
881dbfe8 | 576 | plen = strlen(prefix) + 1; |
d7a5c324 | 577 | |
0597f268 HW |
578 | /* FIXME: do we want to make the size calculation conditional based on |
579 | * what is actually present? way more branches and checks, but more | |
580 | * memory efficient... */ | |
7000d38d | 581 | size = NLMSG_SPACE(sizeof(struct nfgenmsg)) |
df6fb868 PM |
582 | + nla_total_size(sizeof(struct nfulnl_msg_packet_hdr)) |
583 | + nla_total_size(sizeof(u_int32_t)) /* ifindex */ | |
584 | + nla_total_size(sizeof(u_int32_t)) /* ifindex */ | |
fbcd923c | 585 | #ifdef CONFIG_BRIDGE_NETFILTER |
df6fb868 PM |
586 | + nla_total_size(sizeof(u_int32_t)) /* ifindex */ |
587 | + nla_total_size(sizeof(u_int32_t)) /* ifindex */ | |
fbcd923c | 588 | #endif |
df6fb868 PM |
589 | + nla_total_size(sizeof(u_int32_t)) /* mark */ |
590 | + nla_total_size(sizeof(u_int32_t)) /* uid */ | |
76aa1ce1 | 591 | + nla_total_size(sizeof(u_int32_t)) /* gid */ |
df6fb868 PM |
592 | + nla_total_size(plen) /* prefix */ |
593 | + nla_total_size(sizeof(struct nfulnl_msg_packet_hw)) | |
594 | + nla_total_size(sizeof(struct nfulnl_msg_packet_timestamp)); | |
0597f268 | 595 | |
eeff9bee PNA |
596 | if (in && skb_mac_header_was_set(skb)) { |
597 | size += nla_total_size(skb->dev->hard_header_len) | |
598 | + nla_total_size(sizeof(u_int16_t)) /* hwtype */ | |
599 | + nla_total_size(sizeof(u_int16_t)); /* hwlen */ | |
600 | } | |
601 | ||
0597f268 HW |
602 | spin_lock_bh(&inst->lock); |
603 | ||
0af5f6c1 | 604 | if (inst->flags & NFULNL_CFG_F_SEQ) |
df6fb868 | 605 | size += nla_total_size(sizeof(u_int32_t)); |
0af5f6c1 | 606 | if (inst->flags & NFULNL_CFG_F_SEQ_GLOBAL) |
df6fb868 | 607 | size += nla_total_size(sizeof(u_int32_t)); |
0af5f6c1 | 608 | |
0597f268 HW |
609 | qthreshold = inst->qthreshold; |
610 | /* per-rule qthreshold overrides per-instance */ | |
5ca431f9 EL |
611 | if (li->u.ulog.qthreshold) |
612 | if (qthreshold > li->u.ulog.qthreshold) | |
613 | qthreshold = li->u.ulog.qthreshold; | |
614 | ||
601e68e1 | 615 | |
0597f268 HW |
616 | switch (inst->copy_mode) { |
617 | case NFULNL_COPY_META: | |
618 | case NFULNL_COPY_NONE: | |
619 | data_len = 0; | |
620 | break; | |
601e68e1 | 621 | |
0597f268 | 622 | case NFULNL_COPY_PACKET: |
601e68e1 | 623 | if (inst->copy_range == 0 |
0597f268 HW |
624 | || inst->copy_range > skb->len) |
625 | data_len = skb->len; | |
626 | else | |
627 | data_len = inst->copy_range; | |
601e68e1 | 628 | |
df6fb868 | 629 | size += nla_total_size(data_len); |
0597f268 | 630 | break; |
601e68e1 | 631 | |
f5c5440d | 632 | case NFULNL_COPY_DISABLED: |
0597f268 | 633 | default: |
55b5a91e | 634 | goto unlock_and_release; |
0597f268 HW |
635 | } |
636 | ||
d63b043d MM |
637 | if (inst->skb && |
638 | size > skb_tailroom(inst->skb) - sizeof(struct nfgenmsg)) { | |
0597f268 HW |
639 | /* either the queue len is too high or we don't have |
640 | * enough room in the skb left. flush to userspace. */ | |
e3567061 | 641 | __nfulnl_flush(inst); |
55b5a91e | 642 | } |
0597f268 | 643 | |
55b5a91e MM |
644 | if (!inst->skb) { |
645 | inst->skb = nfulnl_alloc_skb(inst->nlbufsiz, size); | |
646 | if (!inst->skb) | |
0597f268 | 647 | goto alloc_failure; |
0597f268 HW |
648 | } |
649 | ||
0597f268 HW |
650 | inst->qlen++; |
651 | ||
652 | __build_packet_message(inst, skb, data_len, pf, | |
d7a5c324 | 653 | hooknum, in, out, li, prefix, plen); |
0597f268 | 654 | |
d63b043d MM |
655 | if (inst->qlen >= qthreshold) |
656 | __nfulnl_flush(inst); | |
0597f268 HW |
657 | /* timer_pending always called within inst->lock, so there |
658 | * is no chance of a race here */ | |
d63b043d | 659 | else if (!timer_pending(&inst->timer)) { |
0597f268 HW |
660 | instance_get(inst); |
661 | inst->timer.expires = jiffies + (inst->flushtimeout*HZ/100); | |
662 | add_timer(&inst->timer); | |
663 | } | |
0597f268 | 664 | |
ed32abea MM |
665 | unlock_and_release: |
666 | spin_unlock_bh(&inst->lock); | |
667 | instance_put(inst); | |
0597f268 HW |
668 | return; |
669 | ||
670 | alloc_failure: | |
0597f268 | 671 | /* FIXME: statistics */ |
ed32abea | 672 | goto unlock_and_release; |
0597f268 | 673 | } |
5f7340ef | 674 | EXPORT_SYMBOL_GPL(nfulnl_log_packet); |
0597f268 HW |
675 | |
676 | static int | |
677 | nfulnl_rcv_nl_event(struct notifier_block *this, | |
678 | unsigned long event, void *ptr) | |
679 | { | |
680 | struct netlink_notify *n = ptr; | |
681 | ||
dee5817e | 682 | if (event == NETLINK_URELEASE && n->protocol == NETLINK_NETFILTER) { |
0597f268 HW |
683 | int i; |
684 | ||
685 | /* destroy all instances for this pid */ | |
bed1be20 | 686 | spin_lock_bh(&instances_lock); |
0597f268 HW |
687 | for (i = 0; i < INSTANCE_BUCKETS; i++) { |
688 | struct hlist_node *tmp, *t2; | |
689 | struct nfulnl_instance *inst; | |
690 | struct hlist_head *head = &instance_table[i]; | |
691 | ||
692 | hlist_for_each_entry_safe(inst, tmp, t2, head, hlist) { | |
09ad9bc7 | 693 | if ((net_eq(n->net, &init_net)) && |
b4b51029 | 694 | (n->pid == inst->peer_pid)) |
0597f268 HW |
695 | __instance_destroy(inst); |
696 | } | |
697 | } | |
bed1be20 | 698 | spin_unlock_bh(&instances_lock); |
0597f268 HW |
699 | } |
700 | return NOTIFY_DONE; | |
701 | } | |
702 | ||
703 | static struct notifier_block nfulnl_rtnl_notifier = { | |
704 | .notifier_call = nfulnl_rcv_nl_event, | |
705 | }; | |
706 | ||
707 | static int | |
708 | nfulnl_recv_unsupp(struct sock *ctnl, struct sk_buff *skb, | |
39938324 PM |
709 | const struct nlmsghdr *nlh, |
710 | const struct nlattr * const nfqa[]) | |
0597f268 HW |
711 | { |
712 | return -ENOTSUPP; | |
713 | } | |
714 | ||
ca735b3a | 715 | static struct nf_logger nfulnl_logger __read_mostly = { |
0597f268 HW |
716 | .name = "nfnetlink_log", |
717 | .logfn = &nfulnl_log_packet, | |
718 | .me = THIS_MODULE, | |
719 | }; | |
720 | ||
fd8281ad PM |
721 | static const struct nla_policy nfula_cfg_policy[NFULA_CFG_MAX+1] = { |
722 | [NFULA_CFG_CMD] = { .len = sizeof(struct nfulnl_msg_config_cmd) }, | |
723 | [NFULA_CFG_MODE] = { .len = sizeof(struct nfulnl_msg_config_mode) }, | |
724 | [NFULA_CFG_TIMEOUT] = { .type = NLA_U32 }, | |
725 | [NFULA_CFG_QTHRESH] = { .type = NLA_U32 }, | |
726 | [NFULA_CFG_NLBUFSIZ] = { .type = NLA_U32 }, | |
727 | [NFULA_CFG_FLAGS] = { .type = NLA_U16 }, | |
0597f268 HW |
728 | }; |
729 | ||
730 | static int | |
731 | nfulnl_recv_config(struct sock *ctnl, struct sk_buff *skb, | |
39938324 PM |
732 | const struct nlmsghdr *nlh, |
733 | const struct nlattr * const nfula[]) | |
0597f268 HW |
734 | { |
735 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); | |
736 | u_int16_t group_num = ntohs(nfmsg->res_id); | |
737 | struct nfulnl_instance *inst; | |
b7047a1c | 738 | struct nfulnl_msg_config_cmd *cmd = NULL; |
0597f268 HW |
739 | int ret = 0; |
740 | ||
b7047a1c PM |
741 | if (nfula[NFULA_CFG_CMD]) { |
742 | u_int8_t pf = nfmsg->nfgen_family; | |
743 | cmd = nla_data(nfula[NFULA_CFG_CMD]); | |
744 | ||
745 | /* Commands without queue context */ | |
746 | switch (cmd->command) { | |
747 | case NFULNL_CFG_CMD_PF_BIND: | |
ca735b3a | 748 | return nf_log_bind_pf(pf, &nfulnl_logger); |
b7047a1c | 749 | case NFULNL_CFG_CMD_PF_UNBIND: |
ca735b3a | 750 | nf_log_unbind_pf(pf); |
b7047a1c PM |
751 | return 0; |
752 | } | |
753 | } | |
754 | ||
0597f268 | 755 | inst = instance_lookup_get(group_num); |
c0506365 PM |
756 | if (inst && inst->peer_pid != NETLINK_CB(skb).pid) { |
757 | ret = -EPERM; | |
758 | goto out_put; | |
759 | } | |
760 | ||
b7047a1c | 761 | if (cmd != NULL) { |
0597f268 HW |
762 | switch (cmd->command) { |
763 | case NFULNL_CFG_CMD_BIND: | |
764 | if (inst) { | |
765 | ret = -EBUSY; | |
766 | goto out_put; | |
767 | } | |
768 | ||
769 | inst = instance_create(group_num, | |
770 | NETLINK_CB(skb).pid); | |
baab2ce7 PM |
771 | if (IS_ERR(inst)) { |
772 | ret = PTR_ERR(inst); | |
f414c16c | 773 | goto out; |
0597f268 HW |
774 | } |
775 | break; | |
776 | case NFULNL_CFG_CMD_UNBIND: | |
777 | if (!inst) { | |
778 | ret = -ENODEV; | |
f414c16c | 779 | goto out; |
0597f268 HW |
780 | } |
781 | ||
0597f268 | 782 | instance_destroy(inst); |
a49c6503 | 783 | goto out_put; |
0597f268 | 784 | default: |
cd21f0ac | 785 | ret = -ENOTSUPP; |
0597f268 HW |
786 | break; |
787 | } | |
0597f268 HW |
788 | } |
789 | ||
df6fb868 | 790 | if (nfula[NFULA_CFG_MODE]) { |
0597f268 | 791 | struct nfulnl_msg_config_mode *params; |
df6fb868 | 792 | params = nla_data(nfula[NFULA_CFG_MODE]); |
0597f268 | 793 | |
c0506365 PM |
794 | if (!inst) { |
795 | ret = -ENODEV; | |
796 | goto out; | |
797 | } | |
0597f268 | 798 | nfulnl_set_mode(inst, params->copy_mode, |
d1208b99 | 799 | ntohl(params->copy_range)); |
0597f268 HW |
800 | } |
801 | ||
df6fb868 | 802 | if (nfula[NFULA_CFG_TIMEOUT]) { |
0dfedd28 | 803 | __be32 timeout = nla_get_be32(nfula[NFULA_CFG_TIMEOUT]); |
0597f268 | 804 | |
c0506365 PM |
805 | if (!inst) { |
806 | ret = -ENODEV; | |
807 | goto out; | |
808 | } | |
0597f268 HW |
809 | nfulnl_set_timeout(inst, ntohl(timeout)); |
810 | } | |
811 | ||
df6fb868 | 812 | if (nfula[NFULA_CFG_NLBUFSIZ]) { |
0dfedd28 | 813 | __be32 nlbufsiz = nla_get_be32(nfula[NFULA_CFG_NLBUFSIZ]); |
0597f268 | 814 | |
c0506365 PM |
815 | if (!inst) { |
816 | ret = -ENODEV; | |
817 | goto out; | |
818 | } | |
0597f268 HW |
819 | nfulnl_set_nlbufsiz(inst, ntohl(nlbufsiz)); |
820 | } | |
821 | ||
df6fb868 | 822 | if (nfula[NFULA_CFG_QTHRESH]) { |
0dfedd28 | 823 | __be32 qthresh = nla_get_be32(nfula[NFULA_CFG_QTHRESH]); |
0597f268 | 824 | |
c0506365 PM |
825 | if (!inst) { |
826 | ret = -ENODEV; | |
827 | goto out; | |
828 | } | |
0597f268 HW |
829 | nfulnl_set_qthresh(inst, ntohl(qthresh)); |
830 | } | |
831 | ||
df6fb868 | 832 | if (nfula[NFULA_CFG_FLAGS]) { |
0dfedd28 | 833 | __be16 flags = nla_get_be16(nfula[NFULA_CFG_FLAGS]); |
c0506365 PM |
834 | |
835 | if (!inst) { | |
836 | ret = -ENODEV; | |
837 | goto out; | |
838 | } | |
ee433530 | 839 | nfulnl_set_flags(inst, ntohs(flags)); |
0af5f6c1 HW |
840 | } |
841 | ||
0597f268 HW |
842 | out_put: |
843 | instance_put(inst); | |
dd16704e | 844 | out: |
0597f268 HW |
845 | return ret; |
846 | } | |
847 | ||
7c8d4cb4 | 848 | static const struct nfnl_callback nfulnl_cb[NFULNL_MSG_MAX] = { |
0597f268 | 849 | [NFULNL_MSG_PACKET] = { .call = nfulnl_recv_unsupp, |
37d2e7a2 | 850 | .attr_count = NFULA_MAX, }, |
0597f268 | 851 | [NFULNL_MSG_CONFIG] = { .call = nfulnl_recv_config, |
fd8281ad PM |
852 | .attr_count = NFULA_CFG_MAX, |
853 | .policy = nfula_cfg_policy }, | |
0597f268 HW |
854 | }; |
855 | ||
7c8d4cb4 | 856 | static const struct nfnetlink_subsystem nfulnl_subsys = { |
0597f268 HW |
857 | .name = "log", |
858 | .subsys_id = NFNL_SUBSYS_ULOG, | |
859 | .cb_count = NFULNL_MSG_MAX, | |
0597f268 HW |
860 | .cb = nfulnl_cb, |
861 | }; | |
862 | ||
863 | #ifdef CONFIG_PROC_FS | |
864 | struct iter_state { | |
865 | unsigned int bucket; | |
866 | }; | |
867 | ||
f76cdcee | 868 | static struct hlist_node *get_first(struct iter_state *st) |
0597f268 | 869 | { |
0597f268 HW |
870 | if (!st) |
871 | return NULL; | |
872 | ||
873 | for (st->bucket = 0; st->bucket < INSTANCE_BUCKETS; st->bucket++) { | |
874 | if (!hlist_empty(&instance_table[st->bucket])) | |
bed1be20 | 875 | return rcu_dereference_bh(instance_table[st->bucket].first); |
0597f268 HW |
876 | } |
877 | return NULL; | |
878 | } | |
879 | ||
f76cdcee | 880 | static struct hlist_node *get_next(struct iter_state *st, struct hlist_node *h) |
0597f268 | 881 | { |
bed1be20 | 882 | h = rcu_dereference_bh(h->next); |
0597f268 HW |
883 | while (!h) { |
884 | if (++st->bucket >= INSTANCE_BUCKETS) | |
885 | return NULL; | |
886 | ||
bed1be20 | 887 | h = rcu_dereference_bh(instance_table[st->bucket].first); |
0597f268 HW |
888 | } |
889 | return h; | |
890 | } | |
891 | ||
f76cdcee | 892 | static struct hlist_node *get_idx(struct iter_state *st, loff_t pos) |
0597f268 HW |
893 | { |
894 | struct hlist_node *head; | |
f76cdcee | 895 | head = get_first(st); |
0597f268 HW |
896 | |
897 | if (head) | |
f76cdcee | 898 | while (pos && (head = get_next(st, head))) |
0597f268 HW |
899 | pos--; |
900 | return pos ? NULL : head; | |
901 | } | |
902 | ||
903 | static void *seq_start(struct seq_file *seq, loff_t *pos) | |
bed1be20 | 904 | __acquires(rcu_bh) |
0597f268 | 905 | { |
bed1be20 | 906 | rcu_read_lock_bh(); |
f76cdcee | 907 | return get_idx(seq->private, *pos); |
0597f268 HW |
908 | } |
909 | ||
910 | static void *seq_next(struct seq_file *s, void *v, loff_t *pos) | |
911 | { | |
912 | (*pos)++; | |
f76cdcee | 913 | return get_next(s->private, v); |
0597f268 HW |
914 | } |
915 | ||
916 | static void seq_stop(struct seq_file *s, void *v) | |
bed1be20 | 917 | __releases(rcu_bh) |
0597f268 | 918 | { |
bed1be20 | 919 | rcu_read_unlock_bh(); |
0597f268 HW |
920 | } |
921 | ||
922 | static int seq_show(struct seq_file *s, void *v) | |
923 | { | |
924 | const struct nfulnl_instance *inst = v; | |
925 | ||
601e68e1 | 926 | return seq_printf(s, "%5d %6d %5d %1d %5d %6d %2d\n", |
0597f268 | 927 | inst->group_num, |
601e68e1 | 928 | inst->peer_pid, inst->qlen, |
0597f268 HW |
929 | inst->copy_mode, inst->copy_range, |
930 | inst->flushtimeout, atomic_read(&inst->use)); | |
931 | } | |
932 | ||
56b3d975 | 933 | static const struct seq_operations nful_seq_ops = { |
0597f268 HW |
934 | .start = seq_start, |
935 | .next = seq_next, | |
936 | .stop = seq_stop, | |
937 | .show = seq_show, | |
938 | }; | |
939 | ||
940 | static int nful_open(struct inode *inode, struct file *file) | |
941 | { | |
e2da5913 PE |
942 | return seq_open_private(file, &nful_seq_ops, |
943 | sizeof(struct iter_state)); | |
0597f268 HW |
944 | } |
945 | ||
da7071d7 | 946 | static const struct file_operations nful_file_ops = { |
0597f268 HW |
947 | .owner = THIS_MODULE, |
948 | .open = nful_open, | |
949 | .read = seq_read, | |
950 | .llseek = seq_lseek, | |
951 | .release = seq_release_private, | |
952 | }; | |
953 | ||
954 | #endif /* PROC_FS */ | |
955 | ||
32292a7f | 956 | static int __init nfnetlink_log_init(void) |
0597f268 HW |
957 | { |
958 | int i, status = -ENOMEM; | |
601e68e1 | 959 | |
0597f268 HW |
960 | for (i = 0; i < INSTANCE_BUCKETS; i++) |
961 | INIT_HLIST_HEAD(&instance_table[i]); | |
601e68e1 | 962 | |
0597f268 HW |
963 | /* it's not really all that important to have a random value, so |
964 | * we can do this from the init function, even if there hasn't | |
965 | * been that much entropy yet */ | |
966 | get_random_bytes(&hash_init, sizeof(hash_init)); | |
967 | ||
968 | netlink_register_notifier(&nfulnl_rtnl_notifier); | |
969 | status = nfnetlink_subsys_register(&nfulnl_subsys); | |
970 | if (status < 0) { | |
971 | printk(KERN_ERR "log: failed to create netlink socket\n"); | |
972 | goto cleanup_netlink_notifier; | |
973 | } | |
974 | ||
ca735b3a EL |
975 | status = nf_log_register(NFPROTO_UNSPEC, &nfulnl_logger); |
976 | if (status < 0) { | |
977 | printk(KERN_ERR "log: failed to register logger\n"); | |
978 | goto cleanup_subsys; | |
979 | } | |
980 | ||
0597f268 | 981 | #ifdef CONFIG_PROC_FS |
8eeee8b1 DL |
982 | if (!proc_create("nfnetlink_log", 0440, |
983 | proc_net_netfilter, &nful_file_ops)) | |
ca735b3a | 984 | goto cleanup_logger; |
0597f268 | 985 | #endif |
0597f268 HW |
986 | return status; |
987 | ||
0597f268 | 988 | #ifdef CONFIG_PROC_FS |
ca735b3a EL |
989 | cleanup_logger: |
990 | nf_log_unregister(&nfulnl_logger); | |
991 | #endif | |
0597f268 | 992 | cleanup_subsys: |
0597f268 HW |
993 | nfnetlink_subsys_unregister(&nfulnl_subsys); |
994 | cleanup_netlink_notifier: | |
995 | netlink_unregister_notifier(&nfulnl_rtnl_notifier); | |
996 | return status; | |
997 | } | |
998 | ||
65b4b4e8 | 999 | static void __exit nfnetlink_log_fini(void) |
0597f268 | 1000 | { |
e92ad99c | 1001 | nf_log_unregister(&nfulnl_logger); |
32292a7f PM |
1002 | #ifdef CONFIG_PROC_FS |
1003 | remove_proc_entry("nfnetlink_log", proc_net_netfilter); | |
1004 | #endif | |
1005 | nfnetlink_subsys_unregister(&nfulnl_subsys); | |
1006 | netlink_unregister_notifier(&nfulnl_rtnl_notifier); | |
0597f268 HW |
1007 | } |
1008 | ||
1009 | MODULE_DESCRIPTION("netfilter userspace logging"); | |
1010 | MODULE_AUTHOR("Harald Welte <laforge@netfilter.org>"); | |
1011 | MODULE_LICENSE("GPL"); | |
f682faef | 1012 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_ULOG); |
0597f268 | 1013 | |
65b4b4e8 AM |
1014 | module_init(nfnetlink_log_init); |
1015 | module_exit(nfnetlink_log_fini); |