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1 | /* | |
2 | * net/sched/cls_api.c Packet classifier API. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License | |
6 | * as published by the Free Software Foundation; either version | |
7 | * 2 of the License, or (at your option) any later version. | |
8 | * | |
9 | * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> | |
10 | * | |
11 | * Changes: | |
12 | * | |
13 | * Eduardo J. Blanco <ejbs@netlabs.com.uy> :990222: kmod support | |
14 | * | |
15 | */ | |
16 | ||
17 | #include <linux/module.h> | |
18 | #include <linux/types.h> | |
19 | #include <linux/kernel.h> | |
20 | #include <linux/string.h> | |
21 | #include <linux/errno.h> | |
22 | #include <linux/skbuff.h> | |
23 | #include <linux/init.h> | |
24 | #include <linux/kmod.h> | |
25 | #include <linux/netlink.h> | |
26 | #include <net/netlink.h> | |
27 | #include <net/pkt_sched.h> | |
28 | #include <net/pkt_cls.h> | |
29 | ||
30 | #if 0 /* control */ | |
31 | #define DPRINTK(format,args...) printk(KERN_DEBUG format,##args) | |
32 | #else | |
33 | #define DPRINTK(format,args...) | |
34 | #endif | |
35 | ||
36 | /* The list of all installed classifier types */ | |
37 | ||
38 | static struct tcf_proto_ops *tcf_proto_base; | |
39 | ||
40 | /* Protects list of registered TC modules. It is pure SMP lock. */ | |
41 | static DEFINE_RWLOCK(cls_mod_lock); | |
42 | ||
43 | /* Find classifier type by string name */ | |
44 | ||
45 | static struct tcf_proto_ops * tcf_proto_lookup_ops(struct rtattr *kind) | |
46 | { | |
47 | struct tcf_proto_ops *t = NULL; | |
48 | ||
49 | if (kind) { | |
50 | read_lock(&cls_mod_lock); | |
51 | for (t = tcf_proto_base; t; t = t->next) { | |
52 | if (rtattr_strcmp(kind, t->kind) == 0) { | |
53 | if (!try_module_get(t->owner)) | |
54 | t = NULL; | |
55 | break; | |
56 | } | |
57 | } | |
58 | read_unlock(&cls_mod_lock); | |
59 | } | |
60 | return t; | |
61 | } | |
62 | ||
63 | /* Register(unregister) new classifier type */ | |
64 | ||
65 | int register_tcf_proto_ops(struct tcf_proto_ops *ops) | |
66 | { | |
67 | struct tcf_proto_ops *t, **tp; | |
68 | int rc = -EEXIST; | |
69 | ||
70 | write_lock(&cls_mod_lock); | |
71 | for (tp = &tcf_proto_base; (t = *tp) != NULL; tp = &t->next) | |
72 | if (!strcmp(ops->kind, t->kind)) | |
73 | goto out; | |
74 | ||
75 | ops->next = NULL; | |
76 | *tp = ops; | |
77 | rc = 0; | |
78 | out: | |
79 | write_unlock(&cls_mod_lock); | |
80 | return rc; | |
81 | } | |
82 | ||
83 | int unregister_tcf_proto_ops(struct tcf_proto_ops *ops) | |
84 | { | |
85 | struct tcf_proto_ops *t, **tp; | |
86 | int rc = -ENOENT; | |
87 | ||
88 | write_lock(&cls_mod_lock); | |
89 | for (tp = &tcf_proto_base; (t=*tp) != NULL; tp = &t->next) | |
90 | if (t == ops) | |
91 | break; | |
92 | ||
93 | if (!t) | |
94 | goto out; | |
95 | *tp = t->next; | |
96 | rc = 0; | |
97 | out: | |
98 | write_unlock(&cls_mod_lock); | |
99 | return rc; | |
100 | } | |
101 | ||
102 | static int tfilter_notify(struct sk_buff *oskb, struct nlmsghdr *n, | |
103 | struct tcf_proto *tp, unsigned long fh, int event); | |
104 | ||
105 | ||
106 | /* Select new prio value from the range, managed by kernel. */ | |
107 | ||
108 | static __inline__ u32 tcf_auto_prio(struct tcf_proto *tp) | |
109 | { | |
110 | u32 first = TC_H_MAKE(0xC0000000U,0U); | |
111 | ||
112 | if (tp) | |
113 | first = tp->prio-1; | |
114 | ||
115 | return first; | |
116 | } | |
117 | ||
118 | /* Add/change/delete/get a filter node */ | |
119 | ||
120 | static int tc_ctl_tfilter(struct sk_buff *skb, struct nlmsghdr *n, void *arg) | |
121 | { | |
122 | struct rtattr **tca; | |
123 | struct tcmsg *t; | |
124 | u32 protocol; | |
125 | u32 prio; | |
126 | u32 nprio; | |
127 | u32 parent; | |
128 | struct net_device *dev; | |
129 | struct Qdisc *q; | |
130 | struct tcf_proto **back, **chain; | |
131 | struct tcf_proto *tp; | |
132 | struct tcf_proto_ops *tp_ops; | |
133 | struct Qdisc_class_ops *cops; | |
134 | unsigned long cl; | |
135 | unsigned long fh; | |
136 | int err; | |
137 | ||
138 | replay: | |
139 | tca = arg; | |
140 | t = NLMSG_DATA(n); | |
141 | protocol = TC_H_MIN(t->tcm_info); | |
142 | prio = TC_H_MAJ(t->tcm_info); | |
143 | nprio = prio; | |
144 | parent = t->tcm_parent; | |
145 | cl = 0; | |
146 | ||
147 | if (prio == 0) { | |
148 | /* If no priority is given, user wants we allocated it. */ | |
149 | if (n->nlmsg_type != RTM_NEWTFILTER || !(n->nlmsg_flags&NLM_F_CREATE)) | |
150 | return -ENOENT; | |
151 | prio = TC_H_MAKE(0x80000000U,0U); | |
152 | } | |
153 | ||
154 | /* Find head of filter chain. */ | |
155 | ||
156 | /* Find link */ | |
157 | if ((dev = __dev_get_by_index(t->tcm_ifindex)) == NULL) | |
158 | return -ENODEV; | |
159 | ||
160 | /* Find qdisc */ | |
161 | if (!parent) { | |
162 | q = dev->qdisc_sleeping; | |
163 | parent = q->handle; | |
164 | } else if ((q = qdisc_lookup(dev, TC_H_MAJ(t->tcm_parent))) == NULL) | |
165 | return -EINVAL; | |
166 | ||
167 | /* Is it classful? */ | |
168 | if ((cops = q->ops->cl_ops) == NULL) | |
169 | return -EINVAL; | |
170 | ||
171 | /* Do we search for filter, attached to class? */ | |
172 | if (TC_H_MIN(parent)) { | |
173 | cl = cops->get(q, parent); | |
174 | if (cl == 0) | |
175 | return -ENOENT; | |
176 | } | |
177 | ||
178 | /* And the last stroke */ | |
179 | chain = cops->tcf_chain(q, cl); | |
180 | err = -EINVAL; | |
181 | if (chain == NULL) | |
182 | goto errout; | |
183 | ||
184 | /* Check the chain for existence of proto-tcf with this priority */ | |
185 | for (back = chain; (tp=*back) != NULL; back = &tp->next) { | |
186 | if (tp->prio >= prio) { | |
187 | if (tp->prio == prio) { | |
188 | if (!nprio || (tp->protocol != protocol && protocol)) | |
189 | goto errout; | |
190 | } else | |
191 | tp = NULL; | |
192 | break; | |
193 | } | |
194 | } | |
195 | ||
196 | if (tp == NULL) { | |
197 | /* Proto-tcf does not exist, create new one */ | |
198 | ||
199 | if (tca[TCA_KIND-1] == NULL || !protocol) | |
200 | goto errout; | |
201 | ||
202 | err = -ENOENT; | |
203 | if (n->nlmsg_type != RTM_NEWTFILTER || !(n->nlmsg_flags&NLM_F_CREATE)) | |
204 | goto errout; | |
205 | ||
206 | ||
207 | /* Create new proto tcf */ | |
208 | ||
209 | err = -ENOBUFS; | |
210 | if ((tp = kzalloc(sizeof(*tp), GFP_KERNEL)) == NULL) | |
211 | goto errout; | |
212 | err = -EINVAL; | |
213 | tp_ops = tcf_proto_lookup_ops(tca[TCA_KIND-1]); | |
214 | if (tp_ops == NULL) { | |
215 | #ifdef CONFIG_KMOD | |
216 | struct rtattr *kind = tca[TCA_KIND-1]; | |
217 | char name[IFNAMSIZ]; | |
218 | ||
219 | if (kind != NULL && | |
220 | rtattr_strlcpy(name, kind, IFNAMSIZ) < IFNAMSIZ) { | |
221 | rtnl_unlock(); | |
222 | request_module("cls_%s", name); | |
223 | rtnl_lock(); | |
224 | tp_ops = tcf_proto_lookup_ops(kind); | |
225 | /* We dropped the RTNL semaphore in order to | |
226 | * perform the module load. So, even if we | |
227 | * succeeded in loading the module we have to | |
228 | * replay the request. We indicate this using | |
229 | * -EAGAIN. | |
230 | */ | |
231 | if (tp_ops != NULL) { | |
232 | module_put(tp_ops->owner); | |
233 | err = -EAGAIN; | |
234 | } | |
235 | } | |
236 | #endif | |
237 | kfree(tp); | |
238 | goto errout; | |
239 | } | |
240 | tp->ops = tp_ops; | |
241 | tp->protocol = protocol; | |
242 | tp->prio = nprio ? : tcf_auto_prio(*back); | |
243 | tp->q = q; | |
244 | tp->classify = tp_ops->classify; | |
245 | tp->classid = parent; | |
246 | if ((err = tp_ops->init(tp)) != 0) { | |
247 | module_put(tp_ops->owner); | |
248 | kfree(tp); | |
249 | goto errout; | |
250 | } | |
251 | ||
252 | qdisc_lock_tree(dev); | |
253 | tp->next = *back; | |
254 | *back = tp; | |
255 | qdisc_unlock_tree(dev); | |
256 | ||
257 | } else if (tca[TCA_KIND-1] && rtattr_strcmp(tca[TCA_KIND-1], tp->ops->kind)) | |
258 | goto errout; | |
259 | ||
260 | fh = tp->ops->get(tp, t->tcm_handle); | |
261 | ||
262 | if (fh == 0) { | |
263 | if (n->nlmsg_type == RTM_DELTFILTER && t->tcm_handle == 0) { | |
264 | qdisc_lock_tree(dev); | |
265 | *back = tp->next; | |
266 | qdisc_unlock_tree(dev); | |
267 | ||
268 | tfilter_notify(skb, n, tp, fh, RTM_DELTFILTER); | |
269 | tcf_destroy(tp); | |
270 | err = 0; | |
271 | goto errout; | |
272 | } | |
273 | ||
274 | err = -ENOENT; | |
275 | if (n->nlmsg_type != RTM_NEWTFILTER || !(n->nlmsg_flags&NLM_F_CREATE)) | |
276 | goto errout; | |
277 | } else { | |
278 | switch (n->nlmsg_type) { | |
279 | case RTM_NEWTFILTER: | |
280 | err = -EEXIST; | |
281 | if (n->nlmsg_flags&NLM_F_EXCL) | |
282 | goto errout; | |
283 | break; | |
284 | case RTM_DELTFILTER: | |
285 | err = tp->ops->delete(tp, fh); | |
286 | if (err == 0) | |
287 | tfilter_notify(skb, n, tp, fh, RTM_DELTFILTER); | |
288 | goto errout; | |
289 | case RTM_GETTFILTER: | |
290 | err = tfilter_notify(skb, n, tp, fh, RTM_NEWTFILTER); | |
291 | goto errout; | |
292 | default: | |
293 | err = -EINVAL; | |
294 | goto errout; | |
295 | } | |
296 | } | |
297 | ||
298 | err = tp->ops->change(tp, cl, t->tcm_handle, tca, &fh); | |
299 | if (err == 0) | |
300 | tfilter_notify(skb, n, tp, fh, RTM_NEWTFILTER); | |
301 | ||
302 | errout: | |
303 | if (cl) | |
304 | cops->put(q, cl); | |
305 | if (err == -EAGAIN) | |
306 | /* Replay the request. */ | |
307 | goto replay; | |
308 | return err; | |
309 | } | |
310 | ||
311 | static int | |
312 | tcf_fill_node(struct sk_buff *skb, struct tcf_proto *tp, unsigned long fh, | |
313 | u32 pid, u32 seq, u16 flags, int event) | |
314 | { | |
315 | struct tcmsg *tcm; | |
316 | struct nlmsghdr *nlh; | |
317 | unsigned char *b = skb_tail_pointer(skb); | |
318 | ||
319 | nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*tcm), flags); | |
320 | tcm = NLMSG_DATA(nlh); | |
321 | tcm->tcm_family = AF_UNSPEC; | |
322 | tcm->tcm__pad1 = 0; | |
323 | tcm->tcm__pad1 = 0; | |
324 | tcm->tcm_ifindex = tp->q->dev->ifindex; | |
325 | tcm->tcm_parent = tp->classid; | |
326 | tcm->tcm_info = TC_H_MAKE(tp->prio, tp->protocol); | |
327 | RTA_PUT(skb, TCA_KIND, IFNAMSIZ, tp->ops->kind); | |
328 | tcm->tcm_handle = fh; | |
329 | if (RTM_DELTFILTER != event) { | |
330 | tcm->tcm_handle = 0; | |
331 | if (tp->ops->dump && tp->ops->dump(tp, fh, skb, tcm) < 0) | |
332 | goto rtattr_failure; | |
333 | } | |
334 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; | |
335 | return skb->len; | |
336 | ||
337 | nlmsg_failure: | |
338 | rtattr_failure: | |
339 | nlmsg_trim(skb, b); | |
340 | return -1; | |
341 | } | |
342 | ||
343 | static int tfilter_notify(struct sk_buff *oskb, struct nlmsghdr *n, | |
344 | struct tcf_proto *tp, unsigned long fh, int event) | |
345 | { | |
346 | struct sk_buff *skb; | |
347 | u32 pid = oskb ? NETLINK_CB(oskb).pid : 0; | |
348 | ||
349 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); | |
350 | if (!skb) | |
351 | return -ENOBUFS; | |
352 | ||
353 | if (tcf_fill_node(skb, tp, fh, pid, n->nlmsg_seq, 0, event) <= 0) { | |
354 | kfree_skb(skb); | |
355 | return -EINVAL; | |
356 | } | |
357 | ||
358 | return rtnetlink_send(skb, pid, RTNLGRP_TC, n->nlmsg_flags&NLM_F_ECHO); | |
359 | } | |
360 | ||
361 | struct tcf_dump_args | |
362 | { | |
363 | struct tcf_walker w; | |
364 | struct sk_buff *skb; | |
365 | struct netlink_callback *cb; | |
366 | }; | |
367 | ||
368 | static int tcf_node_dump(struct tcf_proto *tp, unsigned long n, struct tcf_walker *arg) | |
369 | { | |
370 | struct tcf_dump_args *a = (void*)arg; | |
371 | ||
372 | return tcf_fill_node(a->skb, tp, n, NETLINK_CB(a->cb->skb).pid, | |
373 | a->cb->nlh->nlmsg_seq, NLM_F_MULTI, RTM_NEWTFILTER); | |
374 | } | |
375 | ||
376 | static int tc_dump_tfilter(struct sk_buff *skb, struct netlink_callback *cb) | |
377 | { | |
378 | int t; | |
379 | int s_t; | |
380 | struct net_device *dev; | |
381 | struct Qdisc *q; | |
382 | struct tcf_proto *tp, **chain; | |
383 | struct tcmsg *tcm = (struct tcmsg*)NLMSG_DATA(cb->nlh); | |
384 | unsigned long cl = 0; | |
385 | struct Qdisc_class_ops *cops; | |
386 | struct tcf_dump_args arg; | |
387 | ||
388 | if (cb->nlh->nlmsg_len < NLMSG_LENGTH(sizeof(*tcm))) | |
389 | return skb->len; | |
390 | if ((dev = dev_get_by_index(tcm->tcm_ifindex)) == NULL) | |
391 | return skb->len; | |
392 | ||
393 | if (!tcm->tcm_parent) | |
394 | q = dev->qdisc_sleeping; | |
395 | else | |
396 | q = qdisc_lookup(dev, TC_H_MAJ(tcm->tcm_parent)); | |
397 | if (!q) | |
398 | goto out; | |
399 | if ((cops = q->ops->cl_ops) == NULL) | |
400 | goto errout; | |
401 | if (TC_H_MIN(tcm->tcm_parent)) { | |
402 | cl = cops->get(q, tcm->tcm_parent); | |
403 | if (cl == 0) | |
404 | goto errout; | |
405 | } | |
406 | chain = cops->tcf_chain(q, cl); | |
407 | if (chain == NULL) | |
408 | goto errout; | |
409 | ||
410 | s_t = cb->args[0]; | |
411 | ||
412 | for (tp=*chain, t=0; tp; tp = tp->next, t++) { | |
413 | if (t < s_t) continue; | |
414 | if (TC_H_MAJ(tcm->tcm_info) && | |
415 | TC_H_MAJ(tcm->tcm_info) != tp->prio) | |
416 | continue; | |
417 | if (TC_H_MIN(tcm->tcm_info) && | |
418 | TC_H_MIN(tcm->tcm_info) != tp->protocol) | |
419 | continue; | |
420 | if (t > s_t) | |
421 | memset(&cb->args[1], 0, sizeof(cb->args)-sizeof(cb->args[0])); | |
422 | if (cb->args[1] == 0) { | |
423 | if (tcf_fill_node(skb, tp, 0, NETLINK_CB(cb->skb).pid, | |
424 | cb->nlh->nlmsg_seq, NLM_F_MULTI, RTM_NEWTFILTER) <= 0) { | |
425 | break; | |
426 | } | |
427 | cb->args[1] = 1; | |
428 | } | |
429 | if (tp->ops->walk == NULL) | |
430 | continue; | |
431 | arg.w.fn = tcf_node_dump; | |
432 | arg.skb = skb; | |
433 | arg.cb = cb; | |
434 | arg.w.stop = 0; | |
435 | arg.w.skip = cb->args[1]-1; | |
436 | arg.w.count = 0; | |
437 | tp->ops->walk(tp, &arg.w); | |
438 | cb->args[1] = arg.w.count+1; | |
439 | if (arg.w.stop) | |
440 | break; | |
441 | } | |
442 | ||
443 | cb->args[0] = t; | |
444 | ||
445 | errout: | |
446 | if (cl) | |
447 | cops->put(q, cl); | |
448 | out: | |
449 | dev_put(dev); | |
450 | return skb->len; | |
451 | } | |
452 | ||
453 | void | |
454 | tcf_exts_destroy(struct tcf_proto *tp, struct tcf_exts *exts) | |
455 | { | |
456 | #ifdef CONFIG_NET_CLS_ACT | |
457 | if (exts->action) { | |
458 | tcf_action_destroy(exts->action, TCA_ACT_UNBIND); | |
459 | exts->action = NULL; | |
460 | } | |
461 | #endif | |
462 | } | |
463 | ||
464 | ||
465 | int | |
466 | tcf_exts_validate(struct tcf_proto *tp, struct rtattr **tb, | |
467 | struct rtattr *rate_tlv, struct tcf_exts *exts, | |
468 | struct tcf_ext_map *map) | |
469 | { | |
470 | memset(exts, 0, sizeof(*exts)); | |
471 | ||
472 | #ifdef CONFIG_NET_CLS_ACT | |
473 | { | |
474 | int err; | |
475 | struct tc_action *act; | |
476 | ||
477 | if (map->police && tb[map->police-1]) { | |
478 | act = tcf_action_init_1(tb[map->police-1], rate_tlv, "police", | |
479 | TCA_ACT_NOREPLACE, TCA_ACT_BIND, &err); | |
480 | if (act == NULL) | |
481 | return err; | |
482 | ||
483 | act->type = TCA_OLD_COMPAT; | |
484 | exts->action = act; | |
485 | } else if (map->action && tb[map->action-1]) { | |
486 | act = tcf_action_init(tb[map->action-1], rate_tlv, NULL, | |
487 | TCA_ACT_NOREPLACE, TCA_ACT_BIND, &err); | |
488 | if (act == NULL) | |
489 | return err; | |
490 | ||
491 | exts->action = act; | |
492 | } | |
493 | } | |
494 | #else | |
495 | if ((map->action && tb[map->action-1]) || | |
496 | (map->police && tb[map->police-1])) | |
497 | return -EOPNOTSUPP; | |
498 | #endif | |
499 | ||
500 | return 0; | |
501 | } | |
502 | ||
503 | void | |
504 | tcf_exts_change(struct tcf_proto *tp, struct tcf_exts *dst, | |
505 | struct tcf_exts *src) | |
506 | { | |
507 | #ifdef CONFIG_NET_CLS_ACT | |
508 | if (src->action) { | |
509 | struct tc_action *act; | |
510 | tcf_tree_lock(tp); | |
511 | act = xchg(&dst->action, src->action); | |
512 | tcf_tree_unlock(tp); | |
513 | if (act) | |
514 | tcf_action_destroy(act, TCA_ACT_UNBIND); | |
515 | } | |
516 | #endif | |
517 | } | |
518 | ||
519 | int | |
520 | tcf_exts_dump(struct sk_buff *skb, struct tcf_exts *exts, | |
521 | struct tcf_ext_map *map) | |
522 | { | |
523 | #ifdef CONFIG_NET_CLS_ACT | |
524 | if (map->action && exts->action) { | |
525 | /* | |
526 | * again for backward compatible mode - we want | |
527 | * to work with both old and new modes of entering | |
528 | * tc data even if iproute2 was newer - jhs | |
529 | */ | |
530 | struct rtattr *p_rta = (struct rtattr *)skb_tail_pointer(skb); | |
531 | ||
532 | if (exts->action->type != TCA_OLD_COMPAT) { | |
533 | RTA_PUT(skb, map->action, 0, NULL); | |
534 | if (tcf_action_dump(skb, exts->action, 0, 0) < 0) | |
535 | goto rtattr_failure; | |
536 | p_rta->rta_len = skb_tail_pointer(skb) - (u8 *)p_rta; | |
537 | } else if (map->police) { | |
538 | RTA_PUT(skb, map->police, 0, NULL); | |
539 | if (tcf_action_dump_old(skb, exts->action, 0, 0) < 0) | |
540 | goto rtattr_failure; | |
541 | p_rta->rta_len = skb_tail_pointer(skb) - (u8 *)p_rta; | |
542 | } | |
543 | } | |
544 | #endif | |
545 | return 0; | |
546 | rtattr_failure: __attribute__ ((unused)) | |
547 | return -1; | |
548 | } | |
549 | ||
550 | int | |
551 | tcf_exts_dump_stats(struct sk_buff *skb, struct tcf_exts *exts, | |
552 | struct tcf_ext_map *map) | |
553 | { | |
554 | #ifdef CONFIG_NET_CLS_ACT | |
555 | if (exts->action) | |
556 | if (tcf_action_copy_stats(skb, exts->action, 1) < 0) | |
557 | goto rtattr_failure; | |
558 | #endif | |
559 | return 0; | |
560 | rtattr_failure: __attribute__ ((unused)) | |
561 | return -1; | |
562 | } | |
563 | ||
564 | static int __init tc_filter_init(void) | |
565 | { | |
566 | rtnl_register(PF_UNSPEC, RTM_NEWTFILTER, tc_ctl_tfilter, NULL); | |
567 | rtnl_register(PF_UNSPEC, RTM_DELTFILTER, tc_ctl_tfilter, NULL); | |
568 | rtnl_register(PF_UNSPEC, RTM_GETTFILTER, tc_ctl_tfilter, | |
569 | tc_dump_tfilter); | |
570 | ||
571 | return 0; | |
572 | } | |
573 | ||
574 | subsys_initcall(tc_filter_init); | |
575 | ||
576 | EXPORT_SYMBOL(register_tcf_proto_ops); | |
577 | EXPORT_SYMBOL(unregister_tcf_proto_ops); | |
578 | EXPORT_SYMBOL(tcf_exts_validate); | |
579 | EXPORT_SYMBOL(tcf_exts_destroy); | |
580 | EXPORT_SYMBOL(tcf_exts_change); | |
581 | EXPORT_SYMBOL(tcf_exts_dump); | |
582 | EXPORT_SYMBOL(tcf_exts_dump_stats); |