xref: /openbmc/linux/net/sched/act_pedit.c (revision d35ac6ac) 
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * net/sched/act_pedit.c	Generic packet editor
4  *
5  * Authors:	Jamal Hadi Salim (2002-4)
6  */
7 
8 #include <linux/types.h>
9 #include <linux/kernel.h>
10 #include <linux/string.h>
11 #include <linux/errno.h>
12 #include <linux/skbuff.h>
13 #include <linux/rtnetlink.h>
14 #include <linux/module.h>
15 #include <linux/init.h>
16 #include <linux/ip.h>
17 #include <linux/ipv6.h>
18 #include <linux/slab.h>
19 #include <net/ipv6.h>
20 #include <net/netlink.h>
21 #include <net/pkt_sched.h>
22 #include <linux/tc_act/tc_pedit.h>
23 #include <net/tc_act/tc_pedit.h>
24 #include <uapi/linux/tc_act/tc_pedit.h>
25 #include <net/pkt_cls.h>
26 #include <net/tc_wrapper.h>
27 
28 static struct tc_action_ops act_pedit_ops;
29 
30 static const struct nla_policy pedit_policy[TCA_PEDIT_MAX + 1] = {
31 	[TCA_PEDIT_PARMS]	= { .len = sizeof(struct tc_pedit) },
32 	[TCA_PEDIT_KEYS_EX]   = { .type = NLA_NESTED },
33 };
34 
35 static const struct nla_policy pedit_key_ex_policy[TCA_PEDIT_KEY_EX_MAX + 1] = {
36 	[TCA_PEDIT_KEY_EX_HTYPE] =
37 		NLA_POLICY_MAX(NLA_U16, TCA_PEDIT_HDR_TYPE_MAX),
38 	[TCA_PEDIT_KEY_EX_CMD] = NLA_POLICY_MAX(NLA_U16, TCA_PEDIT_CMD_MAX),
39 };
40 
41 static struct tcf_pedit_key_ex *tcf_pedit_keys_ex_parse(struct nlattr *nla,
42 							u8 n, struct netlink_ext_ack *extack)
43 {
44 	struct tcf_pedit_key_ex *keys_ex;
45 	struct tcf_pedit_key_ex *k;
46 	const struct nlattr *ka;
47 	int err = -EINVAL;
48 	int rem;
49 
50 	if (!nla)
51 		return NULL;
52 
53 	keys_ex = kcalloc(n, sizeof(*k), GFP_KERNEL);
54 	if (!keys_ex)
55 		return ERR_PTR(-ENOMEM);
56 
57 	k = keys_ex;
58 
59 	nla_for_each_nested(ka, nla, rem) {
60 		struct nlattr *tb[TCA_PEDIT_KEY_EX_MAX + 1];
61 
62 		if (!n) {
63 			NL_SET_ERR_MSG_MOD(extack, "Can't parse more extended keys than requested");
64 			err = -EINVAL;
65 			goto err_out;
66 		}
67 		n--;
68 
69 		if (nla_type(ka) != TCA_PEDIT_KEY_EX) {
70 			NL_SET_ERR_MSG_ATTR(extack, ka, "Unknown attribute, expected extended key");
71 			err = -EINVAL;
72 			goto err_out;
73 		}
74 
75 		err = nla_parse_nested_deprecated(tb, TCA_PEDIT_KEY_EX_MAX,
76 						  ka, pedit_key_ex_policy,
77 						  NULL);
78 		if (err)
79 			goto err_out;
80 
81 		if (NL_REQ_ATTR_CHECK(extack, nla, tb, TCA_PEDIT_KEY_EX_HTYPE)) {
82 			NL_SET_ERR_MSG(extack, "Missing required attribute");
83 			err = -EINVAL;
84 			goto err_out;
85 		}
86 
87 		if (NL_REQ_ATTR_CHECK(extack, nla, tb, TCA_PEDIT_KEY_EX_CMD)) {
88 			NL_SET_ERR_MSG(extack, "Missing required attribute");
89 			err = -EINVAL;
90 			goto err_out;
91 		}
92 
93 		k->htype = nla_get_u16(tb[TCA_PEDIT_KEY_EX_HTYPE]);
94 		k->cmd = nla_get_u16(tb[TCA_PEDIT_KEY_EX_CMD]);
95 
96 		k++;
97 	}
98 
99 	if (n) {
100 		NL_SET_ERR_MSG_MOD(extack, "Not enough extended keys to parse");
101 		err = -EINVAL;
102 		goto err_out;
103 	}
104 
105 	return keys_ex;
106 
107 err_out:
108 	kfree(keys_ex);
109 	return ERR_PTR(err);
110 }
111 
112 static int tcf_pedit_key_ex_dump(struct sk_buff *skb,
113 				 struct tcf_pedit_key_ex *keys_ex, int n)
114 {
115 	struct nlattr *keys_start = nla_nest_start_noflag(skb,
116 							  TCA_PEDIT_KEYS_EX);
117 
118 	if (!keys_start)
119 		goto nla_failure;
120 	for (; n > 0; n--) {
121 		struct nlattr *key_start;
122 
123 		key_start = nla_nest_start_noflag(skb, TCA_PEDIT_KEY_EX);
124 		if (!key_start)
125 			goto nla_failure;
126 
127 		if (nla_put_u16(skb, TCA_PEDIT_KEY_EX_HTYPE, keys_ex->htype) ||
128 		    nla_put_u16(skb, TCA_PEDIT_KEY_EX_CMD, keys_ex->cmd))
129 			goto nla_failure;
130 
131 		nla_nest_end(skb, key_start);
132 
133 		keys_ex++;
134 	}
135 
136 	nla_nest_end(skb, keys_start);
137 
138 	return 0;
139 nla_failure:
140 	nla_nest_cancel(skb, keys_start);
141 	return -EINVAL;
142 }
143 
144 static void tcf_pedit_cleanup_rcu(struct rcu_head *head)
145 {
146 	struct tcf_pedit_parms *parms =
147 		container_of(head, struct tcf_pedit_parms, rcu);
148 
149 	kfree(parms->tcfp_keys_ex);
150 	kfree(parms->tcfp_keys);
151 
152 	kfree(parms);
153 }
154 
155 static int tcf_pedit_init(struct net *net, struct nlattr *nla,
156 			  struct nlattr *est, struct tc_action **a,
157 			  struct tcf_proto *tp, u32 flags,
158 			  struct netlink_ext_ack *extack)
159 {
160 	struct tc_action_net *tn = net_generic(net, act_pedit_ops.net_id);
161 	bool bind = flags & TCA_ACT_FLAGS_BIND;
162 	struct tcf_chain *goto_ch = NULL;
163 	struct tcf_pedit_parms *oparms, *nparms;
164 	struct nlattr *tb[TCA_PEDIT_MAX + 1];
165 	struct tc_pedit *parm;
166 	struct nlattr *pattr;
167 	struct tcf_pedit *p;
168 	int ret = 0, err;
169 	int i, ksize;
170 	u32 index;
171 
172 	if (!nla) {
173 		NL_SET_ERR_MSG_MOD(extack, "Pedit requires attributes to be passed");
174 		return -EINVAL;
175 	}
176 
177 	err = nla_parse_nested_deprecated(tb, TCA_PEDIT_MAX, nla,
178 					  pedit_policy, NULL);
179 	if (err < 0)
180 		return err;
181 
182 	pattr = tb[TCA_PEDIT_PARMS];
183 	if (!pattr)
184 		pattr = tb[TCA_PEDIT_PARMS_EX];
185 	if (!pattr) {
186 		NL_SET_ERR_MSG_MOD(extack, "Missing required TCA_PEDIT_PARMS or TCA_PEDIT_PARMS_EX pedit attribute");
187 		return -EINVAL;
188 	}
189 
190 	parm = nla_data(pattr);
191 
192 	index = parm->index;
193 	err = tcf_idr_check_alloc(tn, &index, a, bind);
194 	if (!err) {
195 		ret = tcf_idr_create_from_flags(tn, index, est, a,
196 						&act_pedit_ops, bind, flags);
197 		if (ret) {
198 			tcf_idr_cleanup(tn, index);
199 			return ret;
200 		}
201 		ret = ACT_P_CREATED;
202 	} else if (err > 0) {
203 		if (bind)
204 			return 0;
205 		if (!(flags & TCA_ACT_FLAGS_REPLACE)) {
206 			ret = -EEXIST;
207 			goto out_release;
208 		}
209 	} else {
210 		return err;
211 	}
212 
213 	if (!parm->nkeys) {
214 		NL_SET_ERR_MSG_MOD(extack, "Pedit requires keys to be passed");
215 		ret = -EINVAL;
216 		goto out_release;
217 	}
218 	ksize = parm->nkeys * sizeof(struct tc_pedit_key);
219 	if (nla_len(pattr) < sizeof(*parm) + ksize) {
220 		NL_SET_ERR_MSG_ATTR(extack, pattr, "Length of TCA_PEDIT_PARMS or TCA_PEDIT_PARMS_EX pedit attribute is invalid");
221 		ret = -EINVAL;
222 		goto out_release;
223 	}
224 
225 	nparms = kzalloc(sizeof(*nparms), GFP_KERNEL);
226 	if (!nparms) {
227 		ret = -ENOMEM;
228 		goto out_release;
229 	}
230 
231 	nparms->tcfp_keys_ex =
232 		tcf_pedit_keys_ex_parse(tb[TCA_PEDIT_KEYS_EX], parm->nkeys, extack);
233 	if (IS_ERR(nparms->tcfp_keys_ex)) {
234 		ret = PTR_ERR(nparms->tcfp_keys_ex);
235 		goto out_free;
236 	}
237 
238 	err = tcf_action_check_ctrlact(parm->action, tp, &goto_ch, extack);
239 	if (err < 0) {
240 		ret = err;
241 		goto out_free_ex;
242 	}
243 
244 	nparms->tcfp_off_max_hint = 0;
245 	nparms->tcfp_flags = parm->flags;
246 	nparms->tcfp_nkeys = parm->nkeys;
247 
248 	nparms->tcfp_keys = kmemdup(parm->keys, ksize, GFP_KERNEL);
249 	if (!nparms->tcfp_keys) {
250 		ret = -ENOMEM;
251 		goto put_chain;
252 	}
253 
254 	for (i = 0; i < nparms->tcfp_nkeys; ++i) {
255 		u32 offmask = nparms->tcfp_keys[i].offmask;
256 		u32 cur = nparms->tcfp_keys[i].off;
257 
258 		/* The AT option can be added to static offsets in the datapath */
259 		if (!offmask && cur % 4) {
260 			NL_SET_ERR_MSG_MOD(extack, "Offsets must be on 32bit boundaries");
261 			ret = -EINVAL;
262 			goto out_free_keys;
263 		}
264 
265 		/* sanitize the shift value for any later use */
266 		nparms->tcfp_keys[i].shift = min_t(size_t,
267 						   BITS_PER_TYPE(int) - 1,
268 						   nparms->tcfp_keys[i].shift);
269 
270 		/* The AT option can read a single byte, we can bound the actual
271 		 * value with uchar max.
272 		 */
273 		cur += (0xff & offmask) >> nparms->tcfp_keys[i].shift;
274 
275 		/* Each key touches 4 bytes starting from the computed offset */
276 		nparms->tcfp_off_max_hint =
277 			max(nparms->tcfp_off_max_hint, cur + 4);
278 	}
279 
280 	p = to_pedit(*a);
281 
282 	spin_lock_bh(&p->tcf_lock);
283 	goto_ch = tcf_action_set_ctrlact(*a, parm->action, goto_ch);
284 	oparms = rcu_replace_pointer(p->parms, nparms, 1);
285 	spin_unlock_bh(&p->tcf_lock);
286 
287 	if (oparms)
288 		call_rcu(&oparms->rcu, tcf_pedit_cleanup_rcu);
289 
290 	if (goto_ch)
291 		tcf_chain_put_by_act(goto_ch);
292 
293 	return ret;
294 
295 out_free_keys:
296 	kfree(nparms->tcfp_keys);
297 put_chain:
298 	if (goto_ch)
299 		tcf_chain_put_by_act(goto_ch);
300 out_free_ex:
301 	kfree(nparms->tcfp_keys_ex);
302 out_free:
303 	kfree(nparms);
304 out_release:
305 	tcf_idr_release(*a, bind);
306 	return ret;
307 }
308 
309 static void tcf_pedit_cleanup(struct tc_action *a)
310 {
311 	struct tcf_pedit *p = to_pedit(a);
312 	struct tcf_pedit_parms *parms;
313 
314 	parms = rcu_dereference_protected(p->parms, 1);
315 
316 	if (parms)
317 		call_rcu(&parms->rcu, tcf_pedit_cleanup_rcu);
318 }
319 
320 static bool offset_valid(struct sk_buff *skb, int offset)
321 {
322 	if (offset > 0 && offset > skb->len)
323 		return false;
324 
325 	if  (offset < 0 && -offset > skb_headroom(skb))
326 		return false;
327 
328 	return true;
329 }
330 
331 static int pedit_l4_skb_offset(struct sk_buff *skb, int *hoffset, const int header_type)
332 {
333 	const int noff = skb_network_offset(skb);
334 	int ret = -EINVAL;
335 	struct iphdr _iph;
336 
337 	switch (skb->protocol) {
338 	case htons(ETH_P_IP): {
339 		const struct iphdr *iph = skb_header_pointer(skb, noff, sizeof(_iph), &_iph);
340 
341 		if (!iph)
342 			goto out;
343 		*hoffset = noff + iph->ihl * 4;
344 		ret = 0;
345 		break;
346 	}
347 	case htons(ETH_P_IPV6):
348 		ret = ipv6_find_hdr(skb, hoffset, header_type, NULL, NULL) == header_type ? 0 : -EINVAL;
349 		break;
350 	}
351 out:
352 	return ret;
353 }
354 
355 static int pedit_skb_hdr_offset(struct sk_buff *skb,
356 				 enum pedit_header_type htype, int *hoffset)
357 {
358 	int ret = -EINVAL;
359 	/* 'htype' is validated in the netlink parsing */
360 	switch (htype) {
361 	case TCA_PEDIT_KEY_EX_HDR_TYPE_ETH:
362 		if (skb_mac_header_was_set(skb)) {
363 			*hoffset = skb_mac_offset(skb);
364 			ret = 0;
365 		}
366 		break;
367 	case TCA_PEDIT_KEY_EX_HDR_TYPE_NETWORK:
368 	case TCA_PEDIT_KEY_EX_HDR_TYPE_IP4:
369 	case TCA_PEDIT_KEY_EX_HDR_TYPE_IP6:
370 		*hoffset = skb_network_offset(skb);
371 		ret = 0;
372 		break;
373 	case TCA_PEDIT_KEY_EX_HDR_TYPE_TCP:
374 		ret = pedit_l4_skb_offset(skb, hoffset, IPPROTO_TCP);
375 		break;
376 	case TCA_PEDIT_KEY_EX_HDR_TYPE_UDP:
377 		ret = pedit_l4_skb_offset(skb, hoffset, IPPROTO_UDP);
378 		break;
379 	default:
380 		break;
381 	}
382 	return ret;
383 }
384 
385 TC_INDIRECT_SCOPE int tcf_pedit_act(struct sk_buff *skb,
386 				    const struct tc_action *a,
387 				    struct tcf_result *res)
388 {
389 	enum pedit_header_type htype = TCA_PEDIT_KEY_EX_HDR_TYPE_NETWORK;
390 	enum pedit_cmd cmd = TCA_PEDIT_KEY_EX_CMD_SET;
391 	struct tcf_pedit *p = to_pedit(a);
392 	struct tcf_pedit_key_ex *tkey_ex;
393 	struct tcf_pedit_parms *parms;
394 	struct tc_pedit_key *tkey;
395 	u32 max_offset;
396 	int i;
397 
398 	parms = rcu_dereference_bh(p->parms);
399 
400 	max_offset = (skb_transport_header_was_set(skb) ?
401 		      skb_transport_offset(skb) :
402 		      skb_network_offset(skb)) +
403 		     parms->tcfp_off_max_hint;
404 	if (skb_ensure_writable(skb, min(skb->len, max_offset)))
405 		goto done;
406 
407 	tcf_lastuse_update(&p->tcf_tm);
408 	tcf_action_update_bstats(&p->common, skb);
409 
410 	tkey = parms->tcfp_keys;
411 	tkey_ex = parms->tcfp_keys_ex;
412 
413 	for (i = parms->tcfp_nkeys; i > 0; i--, tkey++) {
414 		int offset = tkey->off;
415 		int hoffset = 0;
416 		u32 *ptr, hdata;
417 		u32 val;
418 		int rc;
419 
420 		if (tkey_ex) {
421 			htype = tkey_ex->htype;
422 			cmd = tkey_ex->cmd;
423 
424 			tkey_ex++;
425 		}
426 
427 		rc = pedit_skb_hdr_offset(skb, htype, &hoffset);
428 		if (rc) {
429 			pr_info_ratelimited("tc action pedit unable to extract header offset for header type (0x%x)\n", htype);
430 			goto bad;
431 		}
432 
433 		if (tkey->offmask) {
434 			u8 *d, _d;
435 
436 			if (!offset_valid(skb, hoffset + tkey->at)) {
437 				pr_info_ratelimited("tc action pedit 'at' offset %d out of bounds\n",
438 						    hoffset + tkey->at);
439 				goto bad;
440 			}
441 			d = skb_header_pointer(skb, hoffset + tkey->at,
442 					       sizeof(_d), &_d);
443 			if (!d)
444 				goto bad;
445 
446 			offset += (*d & tkey->offmask) >> tkey->shift;
447 			if (offset % 4) {
448 				pr_info_ratelimited("tc action pedit offset must be on 32 bit boundaries\n");
449 				goto bad;
450 			}
451 		}
452 
453 		if (!offset_valid(skb, hoffset + offset)) {
454 			pr_info_ratelimited("tc action pedit offset %d out of bounds\n", hoffset + offset);
455 			goto bad;
456 		}
457 
458 		ptr = skb_header_pointer(skb, hoffset + offset,
459 					 sizeof(hdata), &hdata);
460 		if (!ptr)
461 			goto bad;
462 		/* just do it, baby */
463 		switch (cmd) {
464 		case TCA_PEDIT_KEY_EX_CMD_SET:
465 			val = tkey->val;
466 			break;
467 		case TCA_PEDIT_KEY_EX_CMD_ADD:
468 			val = (*ptr + tkey->val) & ~tkey->mask;
469 			break;
470 		default:
471 			pr_info_ratelimited("tc action pedit bad command (%d)\n", cmd);
472 			goto bad;
473 		}
474 
475 		*ptr = ((*ptr & tkey->mask) ^ val);
476 		if (ptr == &hdata)
477 			skb_store_bits(skb, hoffset + offset, ptr, 4);
478 	}
479 
480 	goto done;
481 
482 bad:
483 	tcf_action_inc_overlimit_qstats(&p->common);
484 done:
485 	return p->tcf_action;
486 }
487 
488 static void tcf_pedit_stats_update(struct tc_action *a, u64 bytes, u64 packets,
489 				   u64 drops, u64 lastuse, bool hw)
490 {
491 	struct tcf_pedit *d = to_pedit(a);
492 	struct tcf_t *tm = &d->tcf_tm;
493 
494 	tcf_action_update_stats(a, bytes, packets, drops, hw);
495 	tm->lastuse = max_t(u64, tm->lastuse, lastuse);
496 }
497 
498 static int tcf_pedit_dump(struct sk_buff *skb, struct tc_action *a,
499 			  int bind, int ref)
500 {
501 	unsigned char *b = skb_tail_pointer(skb);
502 	struct tcf_pedit *p = to_pedit(a);
503 	struct tcf_pedit_parms *parms;
504 	struct tc_pedit *opt;
505 	struct tcf_t t;
506 	int s;
507 
508 	spin_lock_bh(&p->tcf_lock);
509 	parms = rcu_dereference_protected(p->parms, 1);
510 	s = struct_size(opt, keys, parms->tcfp_nkeys);
511 
512 	opt = kzalloc(s, GFP_ATOMIC);
513 	if (unlikely(!opt)) {
514 		spin_unlock_bh(&p->tcf_lock);
515 		return -ENOBUFS;
516 	}
517 
518 	memcpy(opt->keys, parms->tcfp_keys,
519 	       flex_array_size(opt, keys, parms->tcfp_nkeys));
520 	opt->index = p->tcf_index;
521 	opt->nkeys = parms->tcfp_nkeys;
522 	opt->flags = parms->tcfp_flags;
523 	opt->action = p->tcf_action;
524 	opt->refcnt = refcount_read(&p->tcf_refcnt) - ref;
525 	opt->bindcnt = atomic_read(&p->tcf_bindcnt) - bind;
526 
527 	if (parms->tcfp_keys_ex) {
528 		if (tcf_pedit_key_ex_dump(skb, parms->tcfp_keys_ex,
529 					  parms->tcfp_nkeys))
530 			goto nla_put_failure;
531 
532 		if (nla_put(skb, TCA_PEDIT_PARMS_EX, s, opt))
533 			goto nla_put_failure;
534 	} else {
535 		if (nla_put(skb, TCA_PEDIT_PARMS, s, opt))
536 			goto nla_put_failure;
537 	}
538 
539 	tcf_tm_dump(&t, &p->tcf_tm);
540 	if (nla_put_64bit(skb, TCA_PEDIT_TM, sizeof(t), &t, TCA_PEDIT_PAD))
541 		goto nla_put_failure;
542 	spin_unlock_bh(&p->tcf_lock);
543 
544 	kfree(opt);
545 	return skb->len;
546 
547 nla_put_failure:
548 	spin_unlock_bh(&p->tcf_lock);
549 	nlmsg_trim(skb, b);
550 	kfree(opt);
551 	return -1;
552 }
553 
554 static int tcf_pedit_offload_act_setup(struct tc_action *act, void *entry_data,
555 				       u32 *index_inc, bool bind,
556 				       struct netlink_ext_ack *extack)
557 {
558 	if (bind) {
559 		struct flow_action_entry *entry = entry_data;
560 		int k;
561 
562 		for (k = 0; k < tcf_pedit_nkeys(act); k++) {
563 			switch (tcf_pedit_cmd(act, k)) {
564 			case TCA_PEDIT_KEY_EX_CMD_SET:
565 				entry->id = FLOW_ACTION_MANGLE;
566 				break;
567 			case TCA_PEDIT_KEY_EX_CMD_ADD:
568 				entry->id = FLOW_ACTION_ADD;
569 				break;
570 			default:
571 				NL_SET_ERR_MSG_MOD(extack, "Unsupported pedit command offload");
572 				return -EOPNOTSUPP;
573 			}
574 			entry->mangle.htype = tcf_pedit_htype(act, k);
575 			entry->mangle.mask = tcf_pedit_mask(act, k);
576 			entry->mangle.val = tcf_pedit_val(act, k);
577 			entry->mangle.offset = tcf_pedit_offset(act, k);
578 			entry->hw_stats = tc_act_hw_stats(act->hw_stats);
579 			entry++;
580 		}
581 		*index_inc = k;
582 	} else {
583 		struct flow_offload_action *fl_action = entry_data;
584 		u32 cmd = tcf_pedit_cmd(act, 0);
585 		int k;
586 
587 		switch (cmd) {
588 		case TCA_PEDIT_KEY_EX_CMD_SET:
589 			fl_action->id = FLOW_ACTION_MANGLE;
590 			break;
591 		case TCA_PEDIT_KEY_EX_CMD_ADD:
592 			fl_action->id = FLOW_ACTION_ADD;
593 			break;
594 		default:
595 			NL_SET_ERR_MSG_MOD(extack, "Unsupported pedit command offload");
596 			return -EOPNOTSUPP;
597 		}
598 
599 		for (k = 1; k < tcf_pedit_nkeys(act); k++) {
600 			if (cmd != tcf_pedit_cmd(act, k)) {
601 				NL_SET_ERR_MSG_MOD(extack, "Unsupported pedit command offload");
602 				return -EOPNOTSUPP;
603 			}
604 		}
605 	}
606 
607 	return 0;
608 }
609 
610 static struct tc_action_ops act_pedit_ops = {
611 	.kind		=	"pedit",
612 	.id		=	TCA_ID_PEDIT,
613 	.owner		=	THIS_MODULE,
614 	.act		=	tcf_pedit_act,
615 	.stats_update	=	tcf_pedit_stats_update,
616 	.dump		=	tcf_pedit_dump,
617 	.cleanup	=	tcf_pedit_cleanup,
618 	.init		=	tcf_pedit_init,
619 	.offload_act_setup =	tcf_pedit_offload_act_setup,
620 	.size		=	sizeof(struct tcf_pedit),
621 };
622 
623 static __net_init int pedit_init_net(struct net *net)
624 {
625 	struct tc_action_net *tn = net_generic(net, act_pedit_ops.net_id);
626 
627 	return tc_action_net_init(net, tn, &act_pedit_ops);
628 }
629 
630 static void __net_exit pedit_exit_net(struct list_head *net_list)
631 {
632 	tc_action_net_exit(net_list, act_pedit_ops.net_id);
633 }
634 
635 static struct pernet_operations pedit_net_ops = {
636 	.init = pedit_init_net,
637 	.exit_batch = pedit_exit_net,
638 	.id   = &act_pedit_ops.net_id,
639 	.size = sizeof(struct tc_action_net),
640 };
641 
642 MODULE_AUTHOR("Jamal Hadi Salim(2002-4)");
643 MODULE_DESCRIPTION("Generic Packet Editor actions");
644 MODULE_LICENSE("GPL");
645 
646 static int __init pedit_init_module(void)
647 {
648 	return tcf_register_action(&act_pedit_ops, &pedit_net_ops);
649 }
650 
651 static void __exit pedit_cleanup_module(void)
652 {
653 	tcf_unregister_action(&act_pedit_ops, &pedit_net_ops);
654 }
655 
656 module_init(pedit_init_module);
657 module_exit(pedit_cleanup_module);
658