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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 | 35 | |
60063497 | 36 | #include <linux/atomic.h> |
0597f268 | 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) { |
ad2ad0f9 PM |
310 | if (n > pkt_size) { |
311 | /* try to allocate only as much as we need for current | |
312 | * packet */ | |
0597f268 | 313 | |
ad2ad0f9 PM |
314 | skb = alloc_skb(pkt_size, GFP_ATOMIC); |
315 | if (!skb) | |
0a9ee813 JP |
316 | pr_err("nfnetlink_log: can't even alloc %u bytes\n", |
317 | pkt_size); | |
ad2ad0f9 | 318 | } |
0597f268 HW |
319 | } |
320 | ||
321 | return skb; | |
322 | } | |
323 | ||
324 | static int | |
325 | __nfulnl_send(struct nfulnl_instance *inst) | |
326 | { | |
29c5d4af | 327 | int status = -1; |
0597f268 | 328 | |
0597f268 | 329 | if (inst->qlen > 1) |
29c5d4af EL |
330 | NLMSG_PUT(inst->skb, 0, 0, |
331 | NLMSG_DONE, | |
332 | sizeof(struct nfgenmsg)); | |
0597f268 | 333 | |
cd8c20b6 AD |
334 | status = nfnetlink_unicast(inst->skb, &init_net, inst->peer_pid, |
335 | MSG_DONTWAIT); | |
0597f268 HW |
336 | |
337 | inst->qlen = 0; | |
338 | inst->skb = NULL; | |
0597f268 | 339 | |
29c5d4af | 340 | nlmsg_failure: |
0597f268 HW |
341 | return status; |
342 | } | |
343 | ||
e3567061 MM |
344 | static void |
345 | __nfulnl_flush(struct nfulnl_instance *inst) | |
346 | { | |
347 | /* timer holds a reference */ | |
348 | if (del_timer(&inst->timer)) | |
349 | instance_put(inst); | |
350 | if (inst->skb) | |
351 | __nfulnl_send(inst); | |
352 | } | |
353 | ||
c6a8f648 MM |
354 | static void |
355 | nfulnl_timer(unsigned long data) | |
0597f268 | 356 | { |
601e68e1 | 357 | struct nfulnl_instance *inst = (struct nfulnl_instance *)data; |
0597f268 | 358 | |
0597f268 | 359 | spin_lock_bh(&inst->lock); |
370e6a87 MM |
360 | if (inst->skb) |
361 | __nfulnl_send(inst); | |
0597f268 | 362 | spin_unlock_bh(&inst->lock); |
05f7b7b3 | 363 | instance_put(inst); |
0597f268 HW |
364 | } |
365 | ||
0af5f6c1 HW |
366 | /* This is an inline function, we don't really care about a long |
367 | * list of arguments */ | |
601e68e1 | 368 | static inline int |
0597f268 | 369 | __build_packet_message(struct nfulnl_instance *inst, |
601e68e1 | 370 | const struct sk_buff *skb, |
0597f268 | 371 | unsigned int data_len, |
76108cea | 372 | u_int8_t pf, |
0597f268 HW |
373 | unsigned int hooknum, |
374 | const struct net_device *indev, | |
375 | const struct net_device *outdev, | |
d7a5c324 | 376 | const char *prefix, unsigned int plen) |
0597f268 | 377 | { |
0597f268 HW |
378 | struct nfulnl_msg_packet_hdr pmsg; |
379 | struct nlmsghdr *nlh; | |
380 | struct nfgenmsg *nfmsg; | |
27a884dc | 381 | sk_buff_data_t old_tail = inst->skb->tail; |
0597f268 | 382 | |
601e68e1 | 383 | nlh = NLMSG_PUT(inst->skb, 0, 0, |
0597f268 HW |
384 | NFNL_SUBSYS_ULOG << 8 | NFULNL_MSG_PACKET, |
385 | sizeof(struct nfgenmsg)); | |
386 | nfmsg = NLMSG_DATA(nlh); | |
387 | nfmsg->nfgen_family = pf; | |
388 | nfmsg->version = NFNETLINK_V0; | |
389 | nfmsg->res_id = htons(inst->group_num); | |
390 | ||
febf0a43 | 391 | pmsg.hw_protocol = skb->protocol; |
0597f268 HW |
392 | pmsg.hook = hooknum; |
393 | ||
df6fb868 | 394 | NLA_PUT(inst->skb, NFULA_PACKET_HDR, sizeof(pmsg), &pmsg); |
0597f268 | 395 | |
d7a5c324 | 396 | if (prefix) |
df6fb868 | 397 | NLA_PUT(inst->skb, NFULA_PREFIX, plen, prefix); |
0597f268 HW |
398 | |
399 | if (indev) { | |
fbcd923c | 400 | #ifndef CONFIG_BRIDGE_NETFILTER |
0dfedd28 PM |
401 | NLA_PUT_BE32(inst->skb, NFULA_IFINDEX_INDEV, |
402 | htonl(indev->ifindex)); | |
fbcd923c HW |
403 | #else |
404 | if (pf == PF_BRIDGE) { | |
405 | /* Case 1: outdev is physical input device, we need to | |
406 | * look for bridge group (when called from | |
407 | * netfilter_bridge) */ | |
0dfedd28 PM |
408 | NLA_PUT_BE32(inst->skb, NFULA_IFINDEX_PHYSINDEV, |
409 | htonl(indev->ifindex)); | |
fbcd923c | 410 | /* this is the bridge group "brX" */ |
f350a0a8 | 411 | /* rcu_read_lock()ed by nf_hook_slow or nf_log_packet */ |
0dfedd28 | 412 | NLA_PUT_BE32(inst->skb, NFULA_IFINDEX_INDEV, |
f350a0a8 | 413 | htonl(br_port_get_rcu(indev)->br->dev->ifindex)); |
fbcd923c HW |
414 | } else { |
415 | /* Case 2: indev is bridge group, we need to look for | |
416 | * physical device (when called from ipv4) */ | |
0dfedd28 PM |
417 | NLA_PUT_BE32(inst->skb, NFULA_IFINDEX_INDEV, |
418 | htonl(indev->ifindex)); | |
419 | if (skb->nf_bridge && skb->nf_bridge->physindev) | |
420 | NLA_PUT_BE32(inst->skb, NFULA_IFINDEX_PHYSINDEV, | |
421 | htonl(skb->nf_bridge->physindev->ifindex)); | |
fbcd923c HW |
422 | } |
423 | #endif | |
0597f268 HW |
424 | } |
425 | ||
426 | if (outdev) { | |
fbcd923c | 427 | #ifndef CONFIG_BRIDGE_NETFILTER |
0dfedd28 PM |
428 | NLA_PUT_BE32(inst->skb, NFULA_IFINDEX_OUTDEV, |
429 | htonl(outdev->ifindex)); | |
fbcd923c HW |
430 | #else |
431 | if (pf == PF_BRIDGE) { | |
432 | /* Case 1: outdev is physical output device, we need to | |
433 | * look for bridge group (when called from | |
434 | * netfilter_bridge) */ | |
0dfedd28 PM |
435 | NLA_PUT_BE32(inst->skb, NFULA_IFINDEX_PHYSOUTDEV, |
436 | htonl(outdev->ifindex)); | |
fbcd923c | 437 | /* this is the bridge group "brX" */ |
f350a0a8 | 438 | /* rcu_read_lock()ed by nf_hook_slow or nf_log_packet */ |
0dfedd28 | 439 | NLA_PUT_BE32(inst->skb, NFULA_IFINDEX_OUTDEV, |
f350a0a8 | 440 | htonl(br_port_get_rcu(outdev)->br->dev->ifindex)); |
fbcd923c HW |
441 | } else { |
442 | /* Case 2: indev is a bridge group, we need to look | |
443 | * for physical device (when called from ipv4) */ | |
0dfedd28 PM |
444 | NLA_PUT_BE32(inst->skb, NFULA_IFINDEX_OUTDEV, |
445 | htonl(outdev->ifindex)); | |
446 | if (skb->nf_bridge && skb->nf_bridge->physoutdev) | |
447 | NLA_PUT_BE32(inst->skb, NFULA_IFINDEX_PHYSOUTDEV, | |
448 | htonl(skb->nf_bridge->physoutdev->ifindex)); | |
fbcd923c HW |
449 | } |
450 | #endif | |
0597f268 HW |
451 | } |
452 | ||
0dfedd28 PM |
453 | if (skb->mark) |
454 | NLA_PUT_BE32(inst->skb, NFULA_MARK, htonl(skb->mark)); | |
0597f268 | 455 | |
2c38de4c NC |
456 | if (indev && skb->dev && |
457 | skb->mac_header != skb->network_header) { | |
0597f268 | 458 | struct nfulnl_msg_packet_hw phw; |
b95cce35 SH |
459 | int len = dev_parse_header(skb, phw.hw_addr); |
460 | if (len > 0) { | |
461 | phw.hw_addrlen = htons(len); | |
df6fb868 | 462 | NLA_PUT(inst->skb, NFULA_HWADDR, sizeof(phw), &phw); |
b95cce35 | 463 | } |
0597f268 HW |
464 | } |
465 | ||
72961ecf EL |
466 | if (indev && skb_mac_header_was_set(skb)) { |
467 | NLA_PUT_BE16(inst->skb, NFULA_HWTYPE, htons(skb->dev->type)); | |
468 | NLA_PUT_BE16(inst->skb, NFULA_HWLEN, | |
469 | htons(skb->dev->hard_header_len)); | |
470 | NLA_PUT(inst->skb, NFULA_HWHEADER, skb->dev->hard_header_len, | |
471 | skb_mac_header(skb)); | |
472 | } | |
473 | ||
b7aa0bf7 | 474 | if (skb->tstamp.tv64) { |
0597f268 | 475 | struct nfulnl_msg_packet_timestamp ts; |
b7aa0bf7 ED |
476 | struct timeval tv = ktime_to_timeval(skb->tstamp); |
477 | ts.sec = cpu_to_be64(tv.tv_sec); | |
478 | ts.usec = cpu_to_be64(tv.tv_usec); | |
0597f268 | 479 | |
df6fb868 | 480 | NLA_PUT(inst->skb, NFULA_TIMESTAMP, sizeof(ts), &ts); |
0597f268 HW |
481 | } |
482 | ||
483 | /* UID */ | |
484 | if (skb->sk) { | |
485 | read_lock_bh(&skb->sk->sk_callback_lock); | |
486 | if (skb->sk->sk_socket && skb->sk->sk_socket->file) { | |
d76b0d9b DH |
487 | struct file *file = skb->sk->sk_socket->file; |
488 | __be32 uid = htonl(file->f_cred->fsuid); | |
489 | __be32 gid = htonl(file->f_cred->fsgid); | |
df6fb868 | 490 | /* need to unlock here since NLA_PUT may goto */ |
0597f268 | 491 | read_unlock_bh(&skb->sk->sk_callback_lock); |
0dfedd28 | 492 | NLA_PUT_BE32(inst->skb, NFULA_UID, uid); |
76aa1ce1 | 493 | NLA_PUT_BE32(inst->skb, NFULA_GID, gid); |
0597f268 HW |
494 | } else |
495 | read_unlock_bh(&skb->sk->sk_callback_lock); | |
496 | } | |
497 | ||
0af5f6c1 | 498 | /* local sequence number */ |
0dfedd28 PM |
499 | if (inst->flags & NFULNL_CFG_F_SEQ) |
500 | NLA_PUT_BE32(inst->skb, NFULA_SEQ, htonl(inst->seq++)); | |
501 | ||
0af5f6c1 | 502 | /* global sequence number */ |
0dfedd28 PM |
503 | if (inst->flags & NFULNL_CFG_F_SEQ_GLOBAL) |
504 | NLA_PUT_BE32(inst->skb, NFULA_SEQ_GLOBAL, | |
505 | htonl(atomic_inc_return(&global_seq))); | |
0af5f6c1 | 506 | |
0597f268 | 507 | if (data_len) { |
df6fb868 PM |
508 | struct nlattr *nla; |
509 | int size = nla_attr_size(data_len); | |
0597f268 | 510 | |
df6fb868 | 511 | if (skb_tailroom(inst->skb) < nla_total_size(data_len)) { |
0597f268 HW |
512 | printk(KERN_WARNING "nfnetlink_log: no tailroom!\n"); |
513 | goto nlmsg_failure; | |
514 | } | |
515 | ||
df6fb868 PM |
516 | nla = (struct nlattr *)skb_put(inst->skb, nla_total_size(data_len)); |
517 | nla->nla_type = NFULA_PAYLOAD; | |
518 | nla->nla_len = size; | |
0597f268 | 519 | |
df6fb868 | 520 | if (skb_copy_bits(skb, 0, nla_data(nla), data_len)) |
0597f268 HW |
521 | BUG(); |
522 | } | |
601e68e1 | 523 | |
0597f268 HW |
524 | nlh->nlmsg_len = inst->skb->tail - old_tail; |
525 | return 0; | |
526 | ||
527 | nlmsg_failure: | |
df6fb868 | 528 | nla_put_failure: |
0597f268 HW |
529 | PRINTR(KERN_ERR "nfnetlink_log: error creating log nlmsg\n"); |
530 | return -1; | |
531 | } | |
532 | ||
533 | #define RCV_SKB_FAIL(err) do { netlink_ack(skb, nlh, (err)); return; } while (0) | |
534 | ||
535 | static struct nf_loginfo default_loginfo = { | |
536 | .type = NF_LOG_TYPE_ULOG, | |
537 | .u = { | |
538 | .ulog = { | |
539 | .copy_len = 0xffff, | |
540 | .group = 0, | |
541 | .qthreshold = 1, | |
542 | }, | |
543 | }, | |
544 | }; | |
545 | ||
546 | /* log handler for internal netfilter logging api */ | |
5f7340ef | 547 | void |
76108cea | 548 | nfulnl_log_packet(u_int8_t pf, |
0597f268 HW |
549 | unsigned int hooknum, |
550 | const struct sk_buff *skb, | |
551 | const struct net_device *in, | |
552 | const struct net_device *out, | |
553 | const struct nf_loginfo *li_user, | |
554 | const char *prefix) | |
555 | { | |
556 | unsigned int size, data_len; | |
557 | struct nfulnl_instance *inst; | |
558 | const struct nf_loginfo *li; | |
559 | unsigned int qthreshold; | |
d7a5c324 | 560 | unsigned int plen; |
0597f268 | 561 | |
601e68e1 | 562 | if (li_user && li_user->type == NF_LOG_TYPE_ULOG) |
0597f268 HW |
563 | li = li_user; |
564 | else | |
565 | li = &default_loginfo; | |
566 | ||
567 | inst = instance_lookup_get(li->u.ulog.group); | |
568 | if (!inst) | |
0597f268 | 569 | return; |
0597f268 | 570 | |
d7a5c324 PM |
571 | plen = 0; |
572 | if (prefix) | |
881dbfe8 | 573 | plen = strlen(prefix) + 1; |
d7a5c324 | 574 | |
0597f268 HW |
575 | /* FIXME: do we want to make the size calculation conditional based on |
576 | * what is actually present? way more branches and checks, but more | |
577 | * memory efficient... */ | |
7000d38d | 578 | size = NLMSG_SPACE(sizeof(struct nfgenmsg)) |
df6fb868 PM |
579 | + nla_total_size(sizeof(struct nfulnl_msg_packet_hdr)) |
580 | + nla_total_size(sizeof(u_int32_t)) /* ifindex */ | |
581 | + nla_total_size(sizeof(u_int32_t)) /* ifindex */ | |
fbcd923c | 582 | #ifdef CONFIG_BRIDGE_NETFILTER |
df6fb868 PM |
583 | + nla_total_size(sizeof(u_int32_t)) /* ifindex */ |
584 | + nla_total_size(sizeof(u_int32_t)) /* ifindex */ | |
fbcd923c | 585 | #endif |
df6fb868 PM |
586 | + nla_total_size(sizeof(u_int32_t)) /* mark */ |
587 | + nla_total_size(sizeof(u_int32_t)) /* uid */ | |
76aa1ce1 | 588 | + nla_total_size(sizeof(u_int32_t)) /* gid */ |
df6fb868 PM |
589 | + nla_total_size(plen) /* prefix */ |
590 | + nla_total_size(sizeof(struct nfulnl_msg_packet_hw)) | |
591 | + nla_total_size(sizeof(struct nfulnl_msg_packet_timestamp)); | |
0597f268 | 592 | |
eeff9bee PNA |
593 | if (in && skb_mac_header_was_set(skb)) { |
594 | size += nla_total_size(skb->dev->hard_header_len) | |
595 | + nla_total_size(sizeof(u_int16_t)) /* hwtype */ | |
596 | + nla_total_size(sizeof(u_int16_t)); /* hwlen */ | |
597 | } | |
598 | ||
0597f268 HW |
599 | spin_lock_bh(&inst->lock); |
600 | ||
0af5f6c1 | 601 | if (inst->flags & NFULNL_CFG_F_SEQ) |
df6fb868 | 602 | size += nla_total_size(sizeof(u_int32_t)); |
0af5f6c1 | 603 | if (inst->flags & NFULNL_CFG_F_SEQ_GLOBAL) |
df6fb868 | 604 | size += nla_total_size(sizeof(u_int32_t)); |
0af5f6c1 | 605 | |
0597f268 HW |
606 | qthreshold = inst->qthreshold; |
607 | /* per-rule qthreshold overrides per-instance */ | |
5ca431f9 EL |
608 | if (li->u.ulog.qthreshold) |
609 | if (qthreshold > li->u.ulog.qthreshold) | |
610 | qthreshold = li->u.ulog.qthreshold; | |
611 | ||
601e68e1 | 612 | |
0597f268 HW |
613 | switch (inst->copy_mode) { |
614 | case NFULNL_COPY_META: | |
615 | case NFULNL_COPY_NONE: | |
616 | data_len = 0; | |
617 | break; | |
601e68e1 | 618 | |
0597f268 | 619 | case NFULNL_COPY_PACKET: |
601e68e1 | 620 | if (inst->copy_range == 0 |
0597f268 HW |
621 | || inst->copy_range > skb->len) |
622 | data_len = skb->len; | |
623 | else | |
624 | data_len = inst->copy_range; | |
601e68e1 | 625 | |
df6fb868 | 626 | size += nla_total_size(data_len); |
0597f268 | 627 | break; |
601e68e1 | 628 | |
f5c5440d | 629 | case NFULNL_COPY_DISABLED: |
0597f268 | 630 | default: |
55b5a91e | 631 | goto unlock_and_release; |
0597f268 HW |
632 | } |
633 | ||
d63b043d MM |
634 | if (inst->skb && |
635 | size > skb_tailroom(inst->skb) - sizeof(struct nfgenmsg)) { | |
0597f268 HW |
636 | /* either the queue len is too high or we don't have |
637 | * enough room in the skb left. flush to userspace. */ | |
e3567061 | 638 | __nfulnl_flush(inst); |
55b5a91e | 639 | } |
0597f268 | 640 | |
55b5a91e MM |
641 | if (!inst->skb) { |
642 | inst->skb = nfulnl_alloc_skb(inst->nlbufsiz, size); | |
643 | if (!inst->skb) | |
0597f268 | 644 | goto alloc_failure; |
0597f268 HW |
645 | } |
646 | ||
0597f268 HW |
647 | inst->qlen++; |
648 | ||
649 | __build_packet_message(inst, skb, data_len, pf, | |
8248779b | 650 | hooknum, in, out, prefix, plen); |
0597f268 | 651 | |
d63b043d MM |
652 | if (inst->qlen >= qthreshold) |
653 | __nfulnl_flush(inst); | |
0597f268 HW |
654 | /* timer_pending always called within inst->lock, so there |
655 | * is no chance of a race here */ | |
d63b043d | 656 | else if (!timer_pending(&inst->timer)) { |
0597f268 HW |
657 | instance_get(inst); |
658 | inst->timer.expires = jiffies + (inst->flushtimeout*HZ/100); | |
659 | add_timer(&inst->timer); | |
660 | } | |
0597f268 | 661 | |
ed32abea MM |
662 | unlock_and_release: |
663 | spin_unlock_bh(&inst->lock); | |
664 | instance_put(inst); | |
0597f268 HW |
665 | return; |
666 | ||
667 | alloc_failure: | |
0597f268 | 668 | /* FIXME: statistics */ |
ed32abea | 669 | goto unlock_and_release; |
0597f268 | 670 | } |
5f7340ef | 671 | EXPORT_SYMBOL_GPL(nfulnl_log_packet); |
0597f268 HW |
672 | |
673 | static int | |
674 | nfulnl_rcv_nl_event(struct notifier_block *this, | |
675 | unsigned long event, void *ptr) | |
676 | { | |
677 | struct netlink_notify *n = ptr; | |
678 | ||
dee5817e | 679 | if (event == NETLINK_URELEASE && n->protocol == NETLINK_NETFILTER) { |
0597f268 HW |
680 | int i; |
681 | ||
682 | /* destroy all instances for this pid */ | |
bed1be20 | 683 | spin_lock_bh(&instances_lock); |
0597f268 HW |
684 | for (i = 0; i < INSTANCE_BUCKETS; i++) { |
685 | struct hlist_node *tmp, *t2; | |
686 | struct nfulnl_instance *inst; | |
687 | struct hlist_head *head = &instance_table[i]; | |
688 | ||
689 | hlist_for_each_entry_safe(inst, tmp, t2, head, hlist) { | |
09ad9bc7 | 690 | if ((net_eq(n->net, &init_net)) && |
b4b51029 | 691 | (n->pid == inst->peer_pid)) |
0597f268 HW |
692 | __instance_destroy(inst); |
693 | } | |
694 | } | |
bed1be20 | 695 | spin_unlock_bh(&instances_lock); |
0597f268 HW |
696 | } |
697 | return NOTIFY_DONE; | |
698 | } | |
699 | ||
700 | static struct notifier_block nfulnl_rtnl_notifier = { | |
701 | .notifier_call = nfulnl_rcv_nl_event, | |
702 | }; | |
703 | ||
704 | static int | |
705 | nfulnl_recv_unsupp(struct sock *ctnl, struct sk_buff *skb, | |
39938324 PM |
706 | const struct nlmsghdr *nlh, |
707 | const struct nlattr * const nfqa[]) | |
0597f268 HW |
708 | { |
709 | return -ENOTSUPP; | |
710 | } | |
711 | ||
ca735b3a | 712 | static struct nf_logger nfulnl_logger __read_mostly = { |
0597f268 HW |
713 | .name = "nfnetlink_log", |
714 | .logfn = &nfulnl_log_packet, | |
715 | .me = THIS_MODULE, | |
716 | }; | |
717 | ||
fd8281ad PM |
718 | static const struct nla_policy nfula_cfg_policy[NFULA_CFG_MAX+1] = { |
719 | [NFULA_CFG_CMD] = { .len = sizeof(struct nfulnl_msg_config_cmd) }, | |
720 | [NFULA_CFG_MODE] = { .len = sizeof(struct nfulnl_msg_config_mode) }, | |
721 | [NFULA_CFG_TIMEOUT] = { .type = NLA_U32 }, | |
722 | [NFULA_CFG_QTHRESH] = { .type = NLA_U32 }, | |
723 | [NFULA_CFG_NLBUFSIZ] = { .type = NLA_U32 }, | |
724 | [NFULA_CFG_FLAGS] = { .type = NLA_U16 }, | |
0597f268 HW |
725 | }; |
726 | ||
727 | static int | |
728 | nfulnl_recv_config(struct sock *ctnl, struct sk_buff *skb, | |
39938324 PM |
729 | const struct nlmsghdr *nlh, |
730 | const struct nlattr * const nfula[]) | |
0597f268 HW |
731 | { |
732 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); | |
733 | u_int16_t group_num = ntohs(nfmsg->res_id); | |
734 | struct nfulnl_instance *inst; | |
b7047a1c | 735 | struct nfulnl_msg_config_cmd *cmd = NULL; |
0597f268 HW |
736 | int ret = 0; |
737 | ||
b7047a1c PM |
738 | if (nfula[NFULA_CFG_CMD]) { |
739 | u_int8_t pf = nfmsg->nfgen_family; | |
740 | cmd = nla_data(nfula[NFULA_CFG_CMD]); | |
741 | ||
742 | /* Commands without queue context */ | |
743 | switch (cmd->command) { | |
744 | case NFULNL_CFG_CMD_PF_BIND: | |
ca735b3a | 745 | return nf_log_bind_pf(pf, &nfulnl_logger); |
b7047a1c | 746 | case NFULNL_CFG_CMD_PF_UNBIND: |
ca735b3a | 747 | nf_log_unbind_pf(pf); |
b7047a1c PM |
748 | return 0; |
749 | } | |
750 | } | |
751 | ||
0597f268 | 752 | inst = instance_lookup_get(group_num); |
c0506365 PM |
753 | if (inst && inst->peer_pid != NETLINK_CB(skb).pid) { |
754 | ret = -EPERM; | |
755 | goto out_put; | |
756 | } | |
757 | ||
b7047a1c | 758 | if (cmd != NULL) { |
0597f268 HW |
759 | switch (cmd->command) { |
760 | case NFULNL_CFG_CMD_BIND: | |
761 | if (inst) { | |
762 | ret = -EBUSY; | |
763 | goto out_put; | |
764 | } | |
765 | ||
766 | inst = instance_create(group_num, | |
767 | NETLINK_CB(skb).pid); | |
baab2ce7 PM |
768 | if (IS_ERR(inst)) { |
769 | ret = PTR_ERR(inst); | |
f414c16c | 770 | goto out; |
0597f268 HW |
771 | } |
772 | break; | |
773 | case NFULNL_CFG_CMD_UNBIND: | |
774 | if (!inst) { | |
775 | ret = -ENODEV; | |
f414c16c | 776 | goto out; |
0597f268 HW |
777 | } |
778 | ||
0597f268 | 779 | instance_destroy(inst); |
a49c6503 | 780 | goto out_put; |
0597f268 | 781 | default: |
cd21f0ac | 782 | ret = -ENOTSUPP; |
0597f268 HW |
783 | break; |
784 | } | |
0597f268 HW |
785 | } |
786 | ||
df6fb868 | 787 | if (nfula[NFULA_CFG_MODE]) { |
0597f268 | 788 | struct nfulnl_msg_config_mode *params; |
df6fb868 | 789 | params = nla_data(nfula[NFULA_CFG_MODE]); |
0597f268 | 790 | |
c0506365 PM |
791 | if (!inst) { |
792 | ret = -ENODEV; | |
793 | goto out; | |
794 | } | |
0597f268 | 795 | nfulnl_set_mode(inst, params->copy_mode, |
d1208b99 | 796 | ntohl(params->copy_range)); |
0597f268 HW |
797 | } |
798 | ||
df6fb868 | 799 | if (nfula[NFULA_CFG_TIMEOUT]) { |
0dfedd28 | 800 | __be32 timeout = nla_get_be32(nfula[NFULA_CFG_TIMEOUT]); |
0597f268 | 801 | |
c0506365 PM |
802 | if (!inst) { |
803 | ret = -ENODEV; | |
804 | goto out; | |
805 | } | |
0597f268 HW |
806 | nfulnl_set_timeout(inst, ntohl(timeout)); |
807 | } | |
808 | ||
df6fb868 | 809 | if (nfula[NFULA_CFG_NLBUFSIZ]) { |
0dfedd28 | 810 | __be32 nlbufsiz = nla_get_be32(nfula[NFULA_CFG_NLBUFSIZ]); |
0597f268 | 811 | |
c0506365 PM |
812 | if (!inst) { |
813 | ret = -ENODEV; | |
814 | goto out; | |
815 | } | |
0597f268 HW |
816 | nfulnl_set_nlbufsiz(inst, ntohl(nlbufsiz)); |
817 | } | |
818 | ||
df6fb868 | 819 | if (nfula[NFULA_CFG_QTHRESH]) { |
0dfedd28 | 820 | __be32 qthresh = nla_get_be32(nfula[NFULA_CFG_QTHRESH]); |
0597f268 | 821 | |
c0506365 PM |
822 | if (!inst) { |
823 | ret = -ENODEV; | |
824 | goto out; | |
825 | } | |
0597f268 HW |
826 | nfulnl_set_qthresh(inst, ntohl(qthresh)); |
827 | } | |
828 | ||
df6fb868 | 829 | if (nfula[NFULA_CFG_FLAGS]) { |
0dfedd28 | 830 | __be16 flags = nla_get_be16(nfula[NFULA_CFG_FLAGS]); |
c0506365 PM |
831 | |
832 | if (!inst) { | |
833 | ret = -ENODEV; | |
834 | goto out; | |
835 | } | |
ee433530 | 836 | nfulnl_set_flags(inst, ntohs(flags)); |
0af5f6c1 HW |
837 | } |
838 | ||
0597f268 HW |
839 | out_put: |
840 | instance_put(inst); | |
dd16704e | 841 | out: |
0597f268 HW |
842 | return ret; |
843 | } | |
844 | ||
7c8d4cb4 | 845 | static const struct nfnl_callback nfulnl_cb[NFULNL_MSG_MAX] = { |
0597f268 | 846 | [NFULNL_MSG_PACKET] = { .call = nfulnl_recv_unsupp, |
37d2e7a2 | 847 | .attr_count = NFULA_MAX, }, |
0597f268 | 848 | [NFULNL_MSG_CONFIG] = { .call = nfulnl_recv_config, |
fd8281ad PM |
849 | .attr_count = NFULA_CFG_MAX, |
850 | .policy = nfula_cfg_policy }, | |
0597f268 HW |
851 | }; |
852 | ||
7c8d4cb4 | 853 | static const struct nfnetlink_subsystem nfulnl_subsys = { |
0597f268 HW |
854 | .name = "log", |
855 | .subsys_id = NFNL_SUBSYS_ULOG, | |
856 | .cb_count = NFULNL_MSG_MAX, | |
0597f268 HW |
857 | .cb = nfulnl_cb, |
858 | }; | |
859 | ||
860 | #ifdef CONFIG_PROC_FS | |
861 | struct iter_state { | |
862 | unsigned int bucket; | |
863 | }; | |
864 | ||
f76cdcee | 865 | static struct hlist_node *get_first(struct iter_state *st) |
0597f268 | 866 | { |
0597f268 HW |
867 | if (!st) |
868 | return NULL; | |
869 | ||
870 | for (st->bucket = 0; st->bucket < INSTANCE_BUCKETS; st->bucket++) { | |
871 | if (!hlist_empty(&instance_table[st->bucket])) | |
0e60ebe0 | 872 | return rcu_dereference_bh(hlist_first_rcu(&instance_table[st->bucket])); |
0597f268 HW |
873 | } |
874 | return NULL; | |
875 | } | |
876 | ||
f76cdcee | 877 | static struct hlist_node *get_next(struct iter_state *st, struct hlist_node *h) |
0597f268 | 878 | { |
0e60ebe0 | 879 | h = rcu_dereference_bh(hlist_next_rcu(h)); |
0597f268 HW |
880 | while (!h) { |
881 | if (++st->bucket >= INSTANCE_BUCKETS) | |
882 | return NULL; | |
883 | ||
0e60ebe0 | 884 | h = rcu_dereference_bh(hlist_first_rcu(&instance_table[st->bucket])); |
0597f268 HW |
885 | } |
886 | return h; | |
887 | } | |
888 | ||
f76cdcee | 889 | static struct hlist_node *get_idx(struct iter_state *st, loff_t pos) |
0597f268 HW |
890 | { |
891 | struct hlist_node *head; | |
f76cdcee | 892 | head = get_first(st); |
0597f268 HW |
893 | |
894 | if (head) | |
f76cdcee | 895 | while (pos && (head = get_next(st, head))) |
0597f268 HW |
896 | pos--; |
897 | return pos ? NULL : head; | |
898 | } | |
899 | ||
900 | static void *seq_start(struct seq_file *seq, loff_t *pos) | |
bed1be20 | 901 | __acquires(rcu_bh) |
0597f268 | 902 | { |
bed1be20 | 903 | rcu_read_lock_bh(); |
f76cdcee | 904 | return get_idx(seq->private, *pos); |
0597f268 HW |
905 | } |
906 | ||
907 | static void *seq_next(struct seq_file *s, void *v, loff_t *pos) | |
908 | { | |
909 | (*pos)++; | |
f76cdcee | 910 | return get_next(s->private, v); |
0597f268 HW |
911 | } |
912 | ||
913 | static void seq_stop(struct seq_file *s, void *v) | |
bed1be20 | 914 | __releases(rcu_bh) |
0597f268 | 915 | { |
bed1be20 | 916 | rcu_read_unlock_bh(); |
0597f268 HW |
917 | } |
918 | ||
919 | static int seq_show(struct seq_file *s, void *v) | |
920 | { | |
921 | const struct nfulnl_instance *inst = v; | |
922 | ||
601e68e1 | 923 | return seq_printf(s, "%5d %6d %5d %1d %5d %6d %2d\n", |
0597f268 | 924 | inst->group_num, |
601e68e1 | 925 | inst->peer_pid, inst->qlen, |
0597f268 HW |
926 | inst->copy_mode, inst->copy_range, |
927 | inst->flushtimeout, atomic_read(&inst->use)); | |
928 | } | |
929 | ||
56b3d975 | 930 | static const struct seq_operations nful_seq_ops = { |
0597f268 HW |
931 | .start = seq_start, |
932 | .next = seq_next, | |
933 | .stop = seq_stop, | |
934 | .show = seq_show, | |
935 | }; | |
936 | ||
937 | static int nful_open(struct inode *inode, struct file *file) | |
938 | { | |
e2da5913 PE |
939 | return seq_open_private(file, &nful_seq_ops, |
940 | sizeof(struct iter_state)); | |
0597f268 HW |
941 | } |
942 | ||
da7071d7 | 943 | static const struct file_operations nful_file_ops = { |
0597f268 HW |
944 | .owner = THIS_MODULE, |
945 | .open = nful_open, | |
946 | .read = seq_read, | |
947 | .llseek = seq_lseek, | |
948 | .release = seq_release_private, | |
949 | }; | |
950 | ||
951 | #endif /* PROC_FS */ | |
952 | ||
32292a7f | 953 | static int __init nfnetlink_log_init(void) |
0597f268 HW |
954 | { |
955 | int i, status = -ENOMEM; | |
601e68e1 | 956 | |
0597f268 HW |
957 | for (i = 0; i < INSTANCE_BUCKETS; i++) |
958 | INIT_HLIST_HEAD(&instance_table[i]); | |
601e68e1 | 959 | |
0597f268 HW |
960 | /* it's not really all that important to have a random value, so |
961 | * we can do this from the init function, even if there hasn't | |
962 | * been that much entropy yet */ | |
963 | get_random_bytes(&hash_init, sizeof(hash_init)); | |
964 | ||
965 | netlink_register_notifier(&nfulnl_rtnl_notifier); | |
966 | status = nfnetlink_subsys_register(&nfulnl_subsys); | |
967 | if (status < 0) { | |
968 | printk(KERN_ERR "log: failed to create netlink socket\n"); | |
969 | goto cleanup_netlink_notifier; | |
970 | } | |
971 | ||
ca735b3a EL |
972 | status = nf_log_register(NFPROTO_UNSPEC, &nfulnl_logger); |
973 | if (status < 0) { | |
974 | printk(KERN_ERR "log: failed to register logger\n"); | |
975 | goto cleanup_subsys; | |
976 | } | |
977 | ||
0597f268 | 978 | #ifdef CONFIG_PROC_FS |
8eeee8b1 DL |
979 | if (!proc_create("nfnetlink_log", 0440, |
980 | proc_net_netfilter, &nful_file_ops)) | |
ca735b3a | 981 | goto cleanup_logger; |
0597f268 | 982 | #endif |
0597f268 HW |
983 | return status; |
984 | ||
0597f268 | 985 | #ifdef CONFIG_PROC_FS |
ca735b3a EL |
986 | cleanup_logger: |
987 | nf_log_unregister(&nfulnl_logger); | |
988 | #endif | |
0597f268 | 989 | cleanup_subsys: |
0597f268 HW |
990 | nfnetlink_subsys_unregister(&nfulnl_subsys); |
991 | cleanup_netlink_notifier: | |
992 | netlink_unregister_notifier(&nfulnl_rtnl_notifier); | |
993 | return status; | |
994 | } | |
995 | ||
65b4b4e8 | 996 | static void __exit nfnetlink_log_fini(void) |
0597f268 | 997 | { |
e92ad99c | 998 | nf_log_unregister(&nfulnl_logger); |
32292a7f PM |
999 | #ifdef CONFIG_PROC_FS |
1000 | remove_proc_entry("nfnetlink_log", proc_net_netfilter); | |
1001 | #endif | |
1002 | nfnetlink_subsys_unregister(&nfulnl_subsys); | |
1003 | netlink_unregister_notifier(&nfulnl_rtnl_notifier); | |
0597f268 HW |
1004 | } |
1005 | ||
1006 | MODULE_DESCRIPTION("netfilter userspace logging"); | |
1007 | MODULE_AUTHOR("Harald Welte <laforge@netfilter.org>"); | |
1008 | MODULE_LICENSE("GPL"); | |
f682faef | 1009 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_ULOG); |
0597f268 | 1010 | |
65b4b4e8 AM |
1011 | module_init(nfnetlink_log_init); |
1012 | module_exit(nfnetlink_log_fini); |